/* roulang page: index */
:root {
            --dd-primary: #0F1F3D;
            --dd-primary-light: #1A3055;
            --dd-accent: #C8842E;
            --dd-accent-light: #E0A24B;
            --dd-accent-dark: #A06820;
            --dd-bg: #F9F8F6;
            --dd-bg-white: #FFFFFF;
            --dd-bg-warm: #F5F1EB;
            --dd-bg-dark: #0B1628;
            --dd-text: #1C1C1E;
            --dd-text-secondary: #5A5A5E;
            --dd-text-light: #8E8E93;
            --dd-text-on-dark: #E8E6E1;
            --dd-border: #E2DFD9;
            --dd-border-light: #EFEDE8;
            --dd-shadow-sm: 0 1px 3px rgba(15, 31, 61, 0.06);
            --dd-shadow-md: 0 4px 16px rgba(15, 31, 61, 0.09);
            --dd-shadow-lg: 0 12px 40px rgba(15, 31, 61, 0.13);
            --dd-shadow-xl: 0 20px 60px rgba(15, 31, 61, 0.18);
            --dd-radius-sm: 8px;
            --dd-radius-md: 14px;
            --dd-radius-lg: 20px;
            --dd-radius-xl: 26px;
            --dd-radius-full: 50px;
            --dd-transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --dd-font-heading: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --dd-font-body: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--dd-font-body);
            font-size: 1rem;
            line-height: 1.72;
            color: var(--dd-text);
            background-color: var(--dd-bg);
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--dd-transition);
        }
        a:hover {
            color: var(--dd-accent);
        }
        a:focus-visible {
            outline: 2px solid var(--dd-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--dd-accent);
            outline-offset: 2px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--dd-font-heading);
            font-weight: 700;
            line-height: 1.3;
            color: var(--dd-primary);
            margin-top: 0;
        }

        .container {
            max-width: 1240px;
        }

        /* ========== HEADER / NAV ========== */
        .dd-header {
            background: var(--dd-bg-white);
            border-bottom: 1px solid var(--dd-border-light);
            position: sticky;
            top: 0;
            z-index: 1050;
            box-shadow: var(--dd-shadow-sm);
            transition: box-shadow var(--dd-transition);
        }
        .dd-header.scrolled {
            box-shadow: var(--dd-shadow-md);
        }
        .dd-navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 0;
            min-height: 66px;
            flex-wrap: nowrap;
        }
        .dd-logo {
            font-family: var(--dd-font-heading);
            font-size: 1.55rem;
            font-weight: 800;
            color: var(--dd-primary);
            letter-spacing: 0.03em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: color var(--dd-transition);
            flex-shrink: 0;
        }
        .dd-logo:hover {
            color: var(--dd-accent);
        }
        .dd-logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: var(--dd-radius-sm);
            background: linear-gradient(135deg, var(--dd-primary) 0%, var(--dd-primary-light) 100%);
            color: #fff;
            font-size: 1.3rem;
            font-weight: 900;
            flex-shrink: 0;
        }
        .dd-nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: nowrap;
        }
        .dd-nav-links li {
            margin: 0;
        }
        .dd-nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 10px 16px;
            border-radius: var(--dd-radius-full);
            font-weight: 600;
            font-size: 0.93rem;
            color: var(--dd-text-secondary);
            transition: all var(--dd-transition);
            white-space: nowrap;
            position: relative;
        }
        .dd-nav-links a:hover {
            color: var(--dd-primary);
            background: var(--dd-bg-warm);
        }
        .dd-nav-links a.active-link {
            color: var(--dd-accent);
            background: #FDF7EF;
            font-weight: 700;
        }
        .dd-nav-cta {
            display: inline-flex;
            align-items: center;
            padding: 10px 22px;
            border-radius: var(--dd-radius-full);
            font-weight: 700;
            font-size: 0.93rem;
            background: var(--dd-accent);
            color: #fff;
            border: none;
            transition: all var(--dd-transition);
            white-space: nowrap;
            flex-shrink: 0;
            cursor: pointer;
        }
        .dd-nav-cta:hover {
            background: var(--dd-accent-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--dd-shadow-md);
        }
        .dd-mobile-toggle {
            display: none;
            border: none;
            background: transparent;
            font-size: 1.5rem;
            color: var(--dd-primary);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--dd-radius-sm);
            transition: background var(--dd-transition);
        }
        .dd-mobile-toggle:hover {
            background: var(--dd-bg-warm);
        }

        /* ========== HERO ========== */
        .dd-hero {
            position: relative;
            background: var(--dd-primary);
            overflow: hidden;
            min-height: 580px;
            display: flex;
            align-items: center;
            color: #fff;
        }
        .dd-hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            filter: brightness(0.7);
        }
        .dd-hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(180deg, rgba(11, 22, 40, 0.75) 0%, rgba(15, 31, 61, 0.9) 100%);
        }
        .dd-hero .container {
            position: relative;
            z-index: 2;
        }
        .dd-hero-content {
            max-width: 700px;
            padding: 50px 0;
        }
        .dd-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.22);
            border-radius: var(--dd-radius-full);
            padding: 6px 18px;
            font-size: 0.88rem;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 20px;
            letter-spacing: 0.04em;
            backdrop-filter: blur(6px);
        }
        .dd-hero-badge i {
            color: var(--dd-accent-light);
        }
        .dd-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
            line-height: 1.2;
        }
        .dd-hero h1 span {
            color: var(--dd-accent-light);
            position: relative;
        }
        .dd-hero-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.78);
            margin-bottom: 10px;
            line-height: 1.7;
        }
        .dd-hero-desc-long {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 28px;
            line-height: 1.75;
            max-width: 600px;
        }
        .dd-hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .dd-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--dd-radius-full);
            font-weight: 700;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: all var(--dd-transition);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .dd-btn-primary {
            background: var(--dd-accent);
            color: #fff;
        }
        .dd-btn-primary:hover {
            background: var(--dd-accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--dd-shadow-lg);
        }
        .dd-btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.45);
        }
        .dd-btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .dd-btn-outline-dark {
            background: transparent;
            color: var(--dd-primary);
            border: 2px solid var(--dd-primary);
        }
        .dd-btn-outline-dark:hover {
            background: var(--dd-primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--dd-shadow-md);
        }

        /* ========== SECTIONS ========== */
        .dd-section {
            padding: 70px 0;
        }
        .dd-section-sm {
            padding: 50px 0;
        }
        .dd-section-dark {
            background: var(--dd-bg-dark);
            color: var(--dd-text-on-dark);
        }
        .dd-section-warm {
            background: var(--dd-bg-warm);
        }
        .dd-section-title {
            text-align: center;
            margin-bottom: 12px;
            font-size: 2rem;
            font-weight: 800;
            color: var(--dd-primary);
        }
        .dd-section-subtitle {
            text-align: center;
            color: var(--dd-text-secondary);
            font-size: 1.05rem;
            margin-bottom: 44px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .dd-section-dark .dd-section-title {
            color: #fff;
        }
        .dd-section-dark .dd-section-subtitle {
            color: rgba(255, 255, 255, 0.6);
        }

        /* ========== STATS CARDS ========== */
        .dd-stat-card {
            background: var(--dd-bg-white);
            border-radius: var(--dd-radius-lg);
            padding: 30px 24px;
            text-align: center;
            box-shadow: var(--dd-shadow-sm);
            border: 1px solid var(--dd-border-light);
            transition: all var(--dd-transition);
            height: 100%;
        }
        .dd-stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--dd-shadow-lg);
            border-color: var(--dd-accent-light);
        }
        .dd-stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--dd-accent);
            font-family: var(--dd-font-heading);
            line-height: 1;
            margin-bottom: 8px;
        }
        .dd-stat-number span {
            font-size: 1.2rem;
            font-weight: 600;
            margin-left: 2px;
        }
        .dd-stat-label {
            font-size: 0.93rem;
            color: var(--dd-text-secondary);
            font-weight: 500;
        }

        /* ========== ADVANTAGE CARDS ========== */
        .dd-advantage-card {
            background: var(--dd-bg-white);
            border-radius: var(--dd-radius-lg);
            padding: 34px 26px;
            box-shadow: var(--dd-shadow-sm);
            border: 1px solid var(--dd-border-light);
            transition: all var(--dd-transition);
            height: 100%;
            text-align: center;
        }
        .dd-advantage-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--dd-shadow-lg);
        }
        .dd-advantage-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--dd-bg-warm);
            color: var(--dd-accent);
            font-size: 1.6rem;
            margin-bottom: 18px;
            transition: all var(--dd-transition);
        }
        .dd-advantage-card:hover .dd-advantage-icon {
            background: var(--dd-accent);
            color: #fff;
            transform: scale(1.08);
        }
        .dd-advantage-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dd-primary);
        }
        .dd-advantage-card p {
            font-size: 0.9rem;
            color: var(--dd-text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        /* ========== BRAND STORY ========== */
        .dd-story-block {
            display: flex;
            align-items: center;
            gap: 50px;
            flex-wrap: wrap;
        }
        .dd-story-img {
            flex: 0 0 420px;
            max-width: 100%;
            border-radius: var(--dd-radius-xl);
            overflow: hidden;
            box-shadow: var(--dd-shadow-lg);
        }
        .dd-story-img img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        .dd-story-text {
            flex: 1;
            min-width: 280px;
        }
        .dd-story-text h3 {
            font-size: 1.7rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--dd-primary);
        }
        .dd-story-text p {
            color: var(--dd-text-secondary);
            line-height: 1.8;
            margin-bottom: 12px;
            font-size: 0.98rem;
        }

        /* ========== CATEGORY / SERVICE CARDS ========== */
        .dd-cat-card {
            display: block;
            background: var(--dd-bg-white);
            border-radius: var(--dd-radius-lg);
            overflow: hidden;
            box-shadow: var(--dd-shadow-sm);
            border: 1px solid var(--dd-border-light);
            transition: all var(--dd-transition);
            height: 100%;
            color: inherit;
        }
        .dd-cat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--dd-shadow-lg);
            color: inherit;
            border-color: var(--dd-accent-light);
        }
        .dd-cat-card-img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            display: block;
        }
        .dd-cat-card-body {
            padding: 20px 18px;
        }
        .dd-cat-card-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--dd-primary);
        }
        .dd-cat-card-body p {
            font-size: 0.88rem;
            color: var(--dd-text-secondary);
            margin: 0;
            line-height: 1.55;
        }
        .dd-cat-card-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--dd-accent);
            background: #FDF7EF;
            padding: 4px 12px;
            border-radius: var(--dd-radius-full);
            margin-bottom: 10px;
        }

        /* ========== NEWS LIST ========== */
        .dd-news-item {
            display: flex;
            gap: 20px;
            padding: 22px 18px;
            background: var(--dd-bg-white);
            border-radius: var(--dd-radius-md);
            box-shadow: var(--dd-shadow-sm);
            border: 1px solid var(--dd-border-light);
            transition: all var(--dd-transition);
            margin-bottom: 14px;
            align-items: flex-start;
            flex-wrap: wrap;
        }
        .dd-news-item:hover {
            box-shadow: var(--dd-shadow-md);
            border-color: var(--dd-accent-light);
            transform: translateX(3px);
        }
        .dd-news-date {
            flex-shrink: 0;
            text-align: center;
            min-width: 60px;
            background: var(--dd-bg-warm);
            border-radius: var(--dd-radius-sm);
            padding: 10px 8px;
            font-weight: 700;
            color: var(--dd-accent);
            font-size: 0.9rem;
            line-height: 1.2;
        }
        .dd-news-date strong {
            display: block;
            font-size: 1.5rem;
            color: var(--dd-primary);
        }
        .dd-news-content {
            flex: 1;
            min-width: 200px;
        }
        .dd-news-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--dd-primary);
        }
        .dd-news-content p {
            font-size: 0.88rem;
            color: var(--dd-text-secondary);
            margin: 0;
            line-height: 1.5;
        }
        .dd-news-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--dd-accent);
            margin-top: 8px;
            transition: color var(--dd-transition);
        }
        .dd-news-link:hover {
            color: var(--dd-accent-dark);
        }

        /* ========== TESTIMONIALS ========== */
        .dd-testimonial-card {
            background: var(--dd-bg-white);
            border-radius: var(--dd-radius-lg);
            padding: 28px 22px;
            box-shadow: var(--dd-shadow-sm);
            border: 1px solid var(--dd-border-light);
            height: 100%;
            transition: all var(--dd-transition);
            position: relative;
        }
        .dd-testimonial-card:hover {
            box-shadow: var(--dd-shadow-md);
            transform: translateY(-3px);
        }
        .dd-testimonial-quote {
            font-size: 3rem;
            color: var(--dd-accent-light);
            line-height: 0;
            margin-bottom: 6px;
            opacity: 0.6;
        }
        .dd-testimonial-card p {
            font-size: 0.93rem;
            color: var(--dd-text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .dd-testimonial-author {
            font-weight: 700;
            color: var(--dd-primary);
            font-size: 0.95rem;
        }
        .dd-testimonial-role {
            font-size: 0.8rem;
            color: var(--dd-text-light);
        }

        /* ========== PARTNER LOGOS ========== */
        .dd-partner-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 30px 40px;
        }
        .dd-partner-item {
            font-weight: 700;
            color: var(--dd-text-light);
            font-size: 1.1rem;
            letter-spacing: 0.05em;
            opacity: 0.7;
            transition: all var(--dd-transition);
            cursor: default;
            white-space: nowrap;
        }
        .dd-partner-item:hover {
            opacity: 1;
            color: var(--dd-accent);
        }

        /* ========== FAQ ========== */
        .dd-faq-item {
            background: var(--dd-bg-white);
            border-radius: var(--dd-radius-md);
            margin-bottom: 10px;
            border: 1px solid var(--dd-border-light);
            overflow: hidden;
            transition: all var(--dd-transition);
        }
        .dd-faq-item:hover {
            box-shadow: var(--dd-shadow-sm);
        }
        .dd-faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            background: transparent;
            border: none;
            font-weight: 700;
            font-size: 1rem;
            color: var(--dd-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color var(--dd-transition);
            font-family: var(--dd-font-heading);
        }
        .dd-faq-question:hover {
            color: var(--dd-accent);
        }
        .dd-faq-question i {
            transition: transform var(--dd-transition);
            color: var(--dd-text-light);
            font-size: 0.85rem;
        }
        .dd-faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
            color: var(--dd-accent);
        }
        .dd-faq-answer {
            padding: 0 22px 18px;
            color: var(--dd-text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
            display: none;
        }
        .dd-faq-item.open .dd-faq-answer {
            display: block;
        }
        .dd-faq-item.open .dd-faq-question {
            color: var(--dd-accent);
        }

        /* ========== CTA BANNER ========== */
        .dd-cta-banner {
            background: linear-gradient(135deg, var(--dd-primary) 0%, var(--dd-primary-light) 100%);
            border-radius: var(--dd-radius-xl);
            padding: 48px 36px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .dd-cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('assets/images/backpic/back-3.webp') center/cover;
            opacity: 0.12;
            z-index: 0;
        }
        .dd-cta-banner>* {
            position: relative;
            z-index: 1;
        }
        .dd-cta-banner h2 {
            color: #fff;
            font-size: 1.9rem;
            font-weight: 800;
            margin-bottom: 10px;
        }
        .dd-cta-banner p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.02rem;
            margin-bottom: 24px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== FOOTER ========== */
        .dd-footer {
            background: var(--dd-bg-dark);
            color: var(--dd-text-on-dark);
            padding: 50px 0 30px;
        }
        .dd-footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .dd-footer h5 {
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .dd-footer p,
        .dd-footer a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            line-height: 2;
            transition: color var(--dd-transition);
        }
        .dd-footer a:hover {
            color: var(--dd-accent-light);
        }
        .dd-footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .dd-footer-links li {
            margin-bottom: 4px;
        }
        .dd-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .dd-hero h1 {
                font-size: 2.4rem;
            }
            .dd-story-block {
                flex-direction: column;
                gap: 30px;
            }
            .dd-story-img {
                flex: 0 0 auto;
                width: 100%;
                max-width: 500px;
            }
            .dd-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .dd-section {
                padding: 50px 0;
            }
            .dd-section-title {
                font-size: 1.7rem;
            }
        }

        @media (max-width: 768px) {
            .dd-nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--dd-bg-white);
                border-bottom: 1px solid var(--dd-border);
                box-shadow: var(--dd-shadow-lg);
                padding: 16px;
                gap: 4px;
                z-index: 1040;
            }
            .dd-nav-links.mobile-open {
                display: flex;
            }
            .dd-nav-links a {
                border-radius: var(--dd-radius-sm);
                padding: 12px 16px;
                width: 100%;
                justify-content: center;
            }
            .dd-mobile-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .dd-nav-cta {
                display: none;
            }
            .dd-nav-cta-mobile {
                display: inline-flex;
                margin-top: 8px;
                width: 100%;
                justify-content: center;
            }
            .dd-hero {
                min-height: 460px;
            }
            .dd-hero h1 {
                font-size: 1.9rem;
            }
            .dd-hero-desc {
                font-size: 1rem;
            }
            .dd-hero-desc-long {
                font-size: 0.85rem;
            }
            .dd-section {
                padding: 40px 0;
            }
            .dd-section-title {
                font-size: 1.45rem;
            }
            .dd-stat-number {
                font-size: 2rem;
            }
            .dd-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .dd-cta-banner {
                padding: 30px 20px;
            }
            .dd-cta-banner h2 {
                font-size: 1.4rem;
            }
            .dd-story-text h3 {
                font-size: 1.35rem;
            }
            .dd-news-item {
                flex-direction: column;
                gap: 10px;
            }
        }

        @media (max-width: 520px) {
            .dd-hero {
                min-height: 400px;
            }
            .dd-hero h1 {
                font-size: 1.55rem;
            }
            .dd-hero-btns {
                flex-direction: column;
                gap: 10px;
            }
            .dd-btn {
                width: 100%;
                justify-content: center;
                padding: 12px 20px;
                font-size: 0.93rem;
            }
            .dd-section-title {
                font-size: 1.25rem;
            }
            .dd-section-subtitle {
                font-size: 0.9rem;
                margin-bottom: 28px;
            }
            .dd-stat-card {
                padding: 20px 14px;
            }
            .dd-stat-number {
                font-size: 1.7rem;
            }
            .dd-advantage-card {
                padding: 22px 16px;
            }
            .dd-partner-row {
                gap: 16px 20px;
            }
            .dd-partner-item {
                font-size: 0.9rem;
            }
            .dd-footer {
                padding: 30px 0 20px;
            }
            .dd-cta-banner h2 {
                font-size: 1.2rem;
            }
            .dd-faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .dd-faq-answer {
                padding: 0 16px 14px;
                font-size: 0.84rem;
            }
        }

/* roulang page: category4 */
:root {
            --dd-primary: #1a1a2e;
            --dd-primary-light: #16213e;
            --dd-accent: #e94560;
            --dd-accent-hover: #d63852;
            --dd-accent-light: #fde8ec;
            --dd-gold: #c9a96e;
            --dd-gold-light: #f5ecd7;
            --dd-bg: #f8f9fb;
            --dd-white: #ffffff;
            --dd-text: #2c2c3a;
            --dd-text-weak: #6b7280;
            --dd-text-muted: #9ca3af;
            --dd-border: #e5e7eb;
            --dd-border-light: #f0f1f3;
            --dd-radius-sm: 8px;
            --dd-radius: 12px;
            --dd-radius-lg: 16px;
            --dd-radius-xl: 20px;
            --dd-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --dd-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
            --dd-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.10);
            --dd-shadow-xl: 0 14px 48px rgba(0, 0, 0, 0.12);
            --dd-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --dd-font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --dd-font-body: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, sans-serif;
            --dd-section-gap: 80px;
            --dd-section-gap-sm: 50px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--dd-font-body);
            line-height: 1.7;
            color: var(--dd-text);
            background-color: var(--dd-bg);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--dd-transition);
        }
        a:hover {
            color: var(--dd-accent);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (min-width: 1400px) {
            .container {
                max-width: 1260px;
            }
        }

        /* ========== HEADER ========== */
        .dd-header {
            background: var(--dd-white);
            border-bottom: 1px solid var(--dd-border-light);
            position: sticky;
            top: 0;
            z-index: 1050;
            box-shadow: var(--dd-shadow-sm);
            padding: 0;
            height: auto;
            min-height: 64px;
            display: flex;
            align-items: center;
        }

        .dd-navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            width: 100%;
            padding: 10px 0;
            gap: 8px;
        }

        .dd-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--dd-primary);
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: opacity var(--dd-transition);
            flex-shrink: 0;
        }
        .dd-logo:hover {
            opacity: 0.82;
            color: var(--dd-primary);
        }

        .dd-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--dd-radius-sm);
            background: linear-gradient(135deg, var(--dd-accent), #c0392b);
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
            letter-spacing: 0;
            flex-shrink: 0;
            box-shadow: 0 3px 10px rgba(233, 68, 96, 0.28);
        }

        .dd-nav-links {
            display: flex;
            align-items: center;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 6px;
            flex-wrap: wrap;
        }
        .dd-nav-links li a {
            display: block;
            padding: 9px 16px;
            border-radius: 20px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--dd-text);
            transition: all var(--dd-transition);
            white-space: nowrap;
            position: relative;
        }
        .dd-nav-links li a:hover {
            color: var(--dd-accent);
            background-color: var(--dd-accent-light);
        }
        .dd-nav-links li a.active-link {
            color: var(--dd-accent);
            font-weight: 600;
            background-color: var(--dd-accent-light);
            box-shadow: inset 0 0 0 1px rgba(233, 68, 96, 0.15);
        }

        .dd-nav-cta {
            display: inline-block;
            padding: 10px 22px;
            border-radius: 24px;
            font-weight: 600;
            font-size: 0.93rem;
            background: var(--dd-accent);
            color: #fff;
            white-space: nowrap;
            transition: all var(--dd-transition);
            box-shadow: 0 3px 12px rgba(233, 68, 96, 0.3);
            flex-shrink: 0;
        }
        .dd-nav-cta:hover {
            background: var(--dd-accent-hover);
            color: #fff;
            box-shadow: 0 6px 20px rgba(233, 68, 96, 0.4);
            transform: translateY(-1px);
        }

        .dd-mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--dd-text);
            padding: 8px 12px;
            border-radius: var(--dd-radius-sm);
            transition: all var(--dd-transition);
            line-height: 1;
        }
        .dd-mobile-toggle:hover {
            background-color: var(--dd-border-light);
            color: var(--dd-accent);
        }

        @media (max-width: 1024px) {
            .dd-nav-links {
                gap: 2px;
            }
            .dd-nav-links li a {
                padding: 7px 12px;
                font-size: 0.88rem;
                border-radius: 16px;
            }
            .dd-nav-cta {
                padding: 8px 16px;
                font-size: 0.85rem;
                border-radius: 20px;
            }
            .dd-logo {
                font-size: 1.2rem;
            }
            .dd-logo-icon {
                width: 34px;
                height: 34px;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 768px) {
            .dd-mobile-toggle {
                display: inline-block;
            }
            .dd-nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--dd-white);
                border-radius: var(--dd-radius);
                padding: 12px 8px;
                box-shadow: var(--dd-shadow-lg);
                margin-top: 6px;
                gap: 2px;
            }
            .dd-nav-links.show {
                display: flex;
            }
            .dd-nav-links li {
                width: 100%;
            }
            .dd-nav-links li a {
                width: 100%;
                padding: 10px 16px;
                font-size: 0.95rem;
                border-radius: var(--dd-radius-sm);
            }
            .dd-nav-cta {
                display: none !important;
            }
            .dd-nav-cta-mobile {
                display: block !important;
                text-align: center;
                margin-top: 6px;
                border-radius: var(--dd-radius-sm);
                background: var(--dd-accent);
                color: #fff;
                font-weight: 600;
                padding: 10px 16px;
                width: 100%;
            }
            .dd-navbar {
                padding: 8px 0;
            }
        }

        @media (max-width: 520px) {
            .dd-logo {
                font-size: 1.05rem;
                gap: 6px;
            }
            .dd-logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.75rem;
            }
            .dd-nav-links li a {
                font-size: 0.9rem;
                padding: 9px 12px;
            }
        }

        /* ========== PAGE BANNER ========== */
        .dd-page-banner {
            background: linear-gradient(150deg, #1a1a2e 0%, #16213e 35%, #1a2744 100%);
            color: #fff;
            padding: 70px 0 64px;
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .dd-page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .dd-page-banner .container {
            position: relative;
            z-index: 2;
        }
        .dd-page-banner .dd-badge-row {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: 30px;
            padding: 6px 18px 6px 8px;
            font-size: 0.85rem;
            font-weight: 500;
            color: #ffd6dc;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }
        .dd-page-banner .dd-badge-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--dd-accent);
            animation: ddPulse 2s ease-in-out infinite;
            flex-shrink: 0;
        }
        @keyframes ddPulse {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(233, 68, 96, 0.6);
            }
            50% {
                box-shadow: 0 0 0 14px rgba(233, 68, 96, 0);
            }
        }
        .dd-page-banner h1 {
            font-family: var(--dd-font-heading);
            font-size: 2.8rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            margin-bottom: 14px;
            color: #fff;
        }
        .dd-page-banner h1 .dd-highlight {
            color: var(--dd-accent);
            position: relative;
        }
        .dd-page-banner .dd-banner-sub {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.78);
            max-width: 620px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .dd-page-banner .dd-banner-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 10px;
        }
        .dd-stat-item-banner {
            text-align: center;
        }
        .dd-stat-item-banner .dd-stat-num {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
        }
        .dd-stat-item-banner .dd-stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .dd-page-banner {
                padding: 50px 0 40px;
            }
            .dd-page-banner h1 {
                font-size: 2rem;
            }
            .dd-page-banner .dd-banner-sub {
                font-size: 0.95rem;
            }
            .dd-page-banner .dd-banner-stats {
                gap: 24px;
            }
            .dd-stat-item-banner .dd-stat-num {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 520px) {
            .dd-page-banner h1 {
                font-size: 1.55rem;
            }
            .dd-page-banner .dd-banner-sub {
                font-size: 0.88rem;
            }
            .dd-stat-item-banner .dd-stat-num {
                font-size: 1.3rem;
            }
            .dd-page-banner .dd-banner-stats {
                gap: 16px;
            }
        }

        /* ========== SECTIONS ========== */
        .dd-section {
            padding: var(--dd-section-gap) 0;
        }
        .dd-section-sm {
            padding: var(--dd-section-gap-sm) 0;
        }
        .dd-section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--dd-accent);
            background: var(--dd-accent-light);
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 10px;
        }
        .dd-section-title {
            font-family: var(--dd-font-heading);
            font-size: 2rem;
            font-weight: 700;
            color: var(--dd-primary);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .dd-section-desc {
            font-size: 1.05rem;
            color: var(--dd-text-weak);
            max-width: 680px;
            line-height: 1.7;
        }
        .dd-section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        @media (max-width: 768px) {
            .dd-section {
                padding: var(--dd-section-gap-sm) 0;
            }
            .dd-section-sm {
                padding: 32px 0;
            }
            .dd-section-title {
                font-size: 1.55rem;
            }
            .dd-section-desc {
                font-size: 0.95rem;
            }
        }

        /* ========== CARDS ========== */
        .dd-card {
            background: var(--dd-white);
            border-radius: var(--dd-radius-lg);
            padding: 28px 24px;
            box-shadow: var(--dd-shadow);
            border: 1px solid var(--dd-border-light);
            transition: all var(--dd-transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .dd-card:hover {
            box-shadow: var(--dd-shadow-lg);
            transform: translateY(-3px);
            border-color: #e0d5c5;
        }
        .dd-card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--dd-radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 16px;
            flex-shrink: 0;
        }
        .dd-card-icon.red {
            background: #fde8ec;
            color: #e94560;
        }
        .dd-card-icon.gold {
            background: #f5ecd7;
            color: #c9a96e;
        }
        .dd-card-icon.blue {
            background: #e0ecf8;
            color: #3b6fb6;
        }
        .dd-card-icon.purple {
            background: #ede4f5;
            color: #7b4fa0;
        }
        .dd-card h3 {
            font-family: var(--dd-font-heading);
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--dd-primary);
            margin-bottom: 8px;
        }
        .dd-card p {
            font-size: 0.93rem;
            color: var(--dd-text-weak);
            line-height: 1.65;
            margin: 0;
            flex-grow: 1;
        }
        .dd-card .dd-card-tag {
            display: inline-block;
            margin-top: 12px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--dd-accent);
            background: var(--dd-accent-light);
            padding: 4px 10px;
            border-radius: 12px;
            align-self: flex-start;
        }

        /* ========== PARTNER LOGO CARD ========== */
        .dd-partner-card {
            background: var(--dd-white);
            border-radius: var(--dd-radius-lg);
            padding: 22px 18px;
            box-shadow: var(--dd-shadow-sm);
            border: 1px solid var(--dd-border-light);
            text-align: center;
            transition: all var(--dd-transition);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
            height: 100%;
        }
        .dd-partner-card:hover {
            box-shadow: var(--dd-shadow-lg);
            transform: translateY(-4px);
            border-color: #d5c8b0;
        }
        .dd-partner-card img {
            width: 80px;
            height: 80px;
            object-fit: cover;
            border-radius: var(--dd-radius);
            box-shadow: var(--dd-shadow-sm);
        }
        .dd-partner-card .dd-partner-name {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--dd-primary);
        }
        .dd-partner-card .dd-partner-type {
            font-size: 0.78rem;
            color: var(--dd-text-muted);
        }

        /* ========== FLOW TIMELINE ========== */
        .dd-flow-steps {
            display: flex;
            flex-wrap: wrap;
            gap: 0;
            position: relative;
            counter-reset: flowstep;
        }
        .dd-flow-step {
            flex: 1;
            min-width: 160px;
            text-align: center;
            position: relative;
            padding: 20px 16px 0;
        }
        .dd-flow-step::before {
            counter-increment: flowstep;
            content: counter(flowstep);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--dd-accent);
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            margin: 0 auto 14px;
            position: relative;
            z-index: 2;
            box-shadow: 0 4px 14px rgba(233, 68, 96, 0.35);
        }
        .dd-flow-step::after {
            content: '';
            position: absolute;
            top: 44px;
            left: 50%;
            width: 100%;
            height: 3px;
            background: var(--dd-border);
            z-index: 1;
        }
        .dd-flow-step:last-child::after {
            display: none;
        }
        .dd-flow-step h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--dd-primary);
            margin-bottom: 4px;
        }
        .dd-flow-step p {
            font-size: 0.85rem;
            color: var(--dd-text-weak);
            line-height: 1.5;
            margin: 0;
        }
        @media (max-width: 768px) {
            .dd-flow-steps {
                flex-direction: column;
                gap: 0;
            }
            .dd-flow-step {
                flex: none;
                padding: 10px 16px 10px 70px;
                text-align: left;
                min-width: auto;
            }
            .dd-flow-step::before {
                position: absolute;
                left: 8px;
                top: 50%;
                transform: translateY(-50%);
                margin: 0;
            }
            .dd-flow-step::after {
                display: none;
            }
            .dd-flow-step h4 {
                margin-bottom: 2px;
            }
        }

        /* ========== HIGHLIGHT BOX ========== */
        .dd-highlight-box {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            border-radius: var(--dd-radius-xl);
            padding: 44px 36px;
            color: #fff;
            position: relative;
            overflow: hidden;
            box-shadow: var(--dd-shadow-xl);
        }
        .dd-highlight-box::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(233, 68, 96, 0.12);
            z-index: 0;
        }
        .dd-highlight-box .row {
            position: relative;
            z-index: 2;
        }
        .dd-highlight-box h3 {
            font-family: var(--dd-font-heading);
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .dd-highlight-box p {
            color: rgba(255, 255, 255, 0.78);
            font-size: 0.95rem;
            line-height: 1.7;
            margin: 0;
        }

        /* ========== FAQ ========== */
        .dd-faq-item {
            background: var(--dd-white);
            border-radius: var(--dd-radius);
            border: 1px solid var(--dd-border-light);
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--dd-transition);
        }
        .dd-faq-item:hover {
            box-shadow: var(--dd-shadow);
            border-color: #e0d5c5;
        }
        .dd-faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            padding: 18px 20px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--dd-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            cursor: pointer;
            transition: color var(--dd-transition);
            line-height: 1.5;
        }
        .dd-faq-question:hover {
            color: var(--dd-accent);
        }
        .dd-faq-question i {
            transition: transform var(--dd-transition);
            color: var(--dd-text-muted);
            flex-shrink: 0;
        }
        .dd-faq-item.open .dd-faq-question i {
            transform: rotate(180deg);
            color: var(--dd-accent);
        }
        .dd-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.35s ease;
            padding: 0 20px;
            font-size: 0.92rem;
            color: var(--dd-text-weak);
            line-height: 1.7;
        }
        .dd-faq-item.open .dd-faq-answer {
            max-height: 400px;
            padding: 0 20px 18px;
        }
        .dd-faq-answer p {
            margin: 0;
        }

        /* ========== CTA SECTION ========== */
        .dd-cta-section {
            background: linear-gradient(150deg, #fde8ec 0%, #fdf2f4 40%, #f8f9fb 100%);
            border-radius: var(--dd-radius-xl);
            padding: 48px 36px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .dd-cta-section h3 {
            font-family: var(--dd-font-heading);
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--dd-primary);
            margin-bottom: 10px;
        }
        .dd-cta-section p {
            color: var(--dd-text-weak);
            max-width: 500px;
            margin: 0 auto 22px;
            font-size: 1rem;
            line-height: 1.6;
        }

        .dd-btn {
            display: inline-block;
            padding: 12px 28px;
            border-radius: 28px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--dd-transition);
            border: none;
            text-align: center;
            cursor: pointer;
        }
        .dd-btn-primary {
            background: var(--dd-accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(233, 68, 96, 0.35);
        }
        .dd-btn-primary:hover {
            background: var(--dd-accent-hover);
            color: #fff;
            box-shadow: 0 8px 24px rgba(233, 68, 96, 0.45);
            transform: translateY(-2px);
        }
        .dd-btn-outline {
            background: transparent;
            color: var(--dd-accent);
            border: 2px solid var(--dd-accent);
        }
        .dd-btn-outline:hover {
            background: var(--dd-accent);
            color: #fff;
            transform: translateY(-2px);
        }
        .dd-btn-lg {
            padding: 14px 36px;
            font-size: 1.05rem;
            border-radius: 30px;
        }

        /* ========== FOOTER ========== */
        .dd-footer {
            background: #1a1a2e;
            color: rgba(255, 255, 255, 0.75);
            padding: 50px 0 28px;
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .dd-footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 30px;
        }
        .dd-footer h5 {
            font-family: var(--dd-font-heading);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .dd-footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .dd-footer-links li {
            margin-bottom: 7px;
        }
        .dd-footer-links li a {
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--dd-transition);
            font-size: 0.88rem;
        }
        .dd-footer-links li a:hover {
            color: var(--dd-accent);
        }
        .dd-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 18px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .dd-footer-bottom p {
            margin: 0;
        }
        @media (max-width: 768px) {
            .dd-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .dd-footer {
                padding: 36px 0 20px;
            }
        }
        @media (max-width: 520px) {
            .dd-footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ========== MISC ========== */
        .dd-img-cover {
            width: 100%;
            height: auto;
            border-radius: var(--dd-radius-lg);
            object-fit: cover;
            box-shadow: var(--dd-shadow);
        }
        .dd-text-center {
            text-align: center;
        }
        .dd-mb-0 {
            margin-bottom: 0 !important;
        }
        .dd-mt-2 {
            margin-top: 8px;
        }
        .dd-mt-3 {
            margin-top: 16px;
        }
        .dd-mt-4 {
            margin-top: 24px;
        }
        .dd-gap-row>* {
            margin-bottom: 24px;
        }

/* roulang page: category2 */
:root {
            --dd-primary: #1e40af;
            --dd-primary-dark: #1a3590;
            --dd-primary-light: #3b5cc7;
            --dd-accent: #f59e0b;
            --dd-accent-hover: #e08f00;
            --dd-accent-light: #fef3c7;
            --dd-bg: #f8fafc;
            --dd-bg-alt: #f1f5f9;
            --dd-surface: #ffffff;
            --dd-text: #1e293b;
            --dd-text-secondary: #475569;
            --dd-muted: #64748b;
            --dd-border: #e2e8f0;
            --dd-border-light: #f1f5f9;
            --dd-radius-sm: 8px;
            --dd-radius: 12px;
            --dd-radius-lg: 16px;
            --dd-radius-xl: 20px;
            --dd-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
            --dd-shadow: 0 4px 24px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.04);
            --dd-shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
            --dd-shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.10), 0 8px 20px rgba(0, 0, 0, 0.05);
            --dd-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --dd-font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --dd-section-gap: 80px;
            --dd-section-gap-mobile: 48px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--dd-font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--dd-text);
            background-color: var(--dd-bg);
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--dd-transition);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== HEADER / NAV ========== */
        .dd-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--dd-border);
            box-shadow: var(--dd-shadow-sm);
            transition: box-shadow var(--dd-transition);
        }

        .dd-header.scrolled {
            box-shadow: var(--dd-shadow);
        }

        .dd-navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 24px;
        }

        .dd-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--dd-primary);
            white-space: nowrap;
            transition: opacity var(--dd-transition);
        }

        .dd-logo:hover {
            opacity: 0.85;
            color: var(--dd-primary-dark);
        }

        .dd-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--dd-radius-sm);
            background: linear-gradient(135deg, var(--dd-primary), var(--dd-primary-light));
            color: #ffffff;
            font-weight: 800;
            font-size: 1rem;
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }

        .dd-nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
        }

        .dd-nav-links li a {
            display: block;
            padding: 8px 16px;
            border-radius: var(--dd-radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--dd-text-secondary);
            transition: all var(--dd-transition);
            white-space: nowrap;
        }

        .dd-nav-links li a:hover {
            color: var(--dd-primary);
            background: rgba(30, 64, 175, 0.05);
        }

        .dd-nav-links li a.active-link {
            color: var(--dd-primary);
            background: rgba(30, 64, 175, 0.08);
            font-weight: 600;
        }

        .dd-nav-cta {
            display: inline-block;
            padding: 10px 22px;
            border-radius: var(--dd-radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            background: var(--dd-accent);
            color: #1e293b;
            white-space: nowrap;
            transition: all var(--dd-transition);
            border: none;
        }

        .dd-nav-cta:hover {
            background: var(--dd-accent-hover);
            color: #1e293b;
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
        }

        .dd-mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--dd-text);
            padding: 8px;
            border-radius: var(--dd-radius-sm);
            transition: background var(--dd-transition);
        }

        .dd-mobile-toggle:hover {
            background: var(--dd-bg-alt);
        }

        /* ========== PAGE BANNER ========== */
        .dd-page-banner {
            position: relative;
            padding: 80px 0 72px;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            z-index: 1;
            overflow: hidden;
        }

        .dd-page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.82) 0%, rgba(30, 64, 175, 0.75) 50%, rgba(15, 23, 42, 0.78) 100%);
            z-index: 0;
        }

        .dd-page-banner .container {
            position: relative;
            z-index: 1;
        }

        .dd-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 16px;
        }

        .dd-breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
            transition: color var(--dd-transition);
        }

        .dd-breadcrumb a:hover {
            color: #ffffff;
        }

        .dd-breadcrumb .dd-breadcrumb-sep {
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .dd-breadcrumb .dd-breadcrumb-current {
            color: var(--dd-accent);
            font-weight: 500;
        }

        .dd-page-banner-title {
            font-size: 2.6rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }

        .dd-page-banner-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            line-height: 1.7;
        }

        /* ========== SECTION COMMON ========== */
        .dd-section {
            padding: var(--dd-section-gap) 0;
        }

        .dd-section-alt {
            background: var(--dd-bg-alt);
        }

        .dd-section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .dd-section-label {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            background: rgba(30, 64, 175, 0.08);
            color: var(--dd-primary);
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        .dd-section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--dd-text);
            letter-spacing: -0.3px;
            margin-bottom: 8px;
        }

        .dd-section-subtitle {
            font-size: 1.05rem;
            color: var(--dd-muted);
            max-width: 560px;
            margin: 0 auto;
        }

        /* ========== STAT CARDS ROW ========== */
        .dd-stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .dd-stat-card {
            background: var(--dd-surface);
            border-radius: var(--dd-radius-lg);
            padding: 28px 24px;
            text-align: center;
            border: 1px solid var(--dd-border);
            box-shadow: var(--dd-shadow-sm);
            transition: all var(--dd-transition);
            position: relative;
            overflow: hidden;
        }

        .dd-stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--dd-primary), var(--dd-primary-light));
            border-radius: 3px 3px 0 0;
            opacity: 0;
            transition: opacity var(--dd-transition);
        }

        .dd-stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--dd-shadow-lg);
            border-color: transparent;
        }

        .dd-stat-card:hover::before {
            opacity: 1;
        }

        .dd-stat-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: var(--dd-radius);
            background: rgba(30, 64, 175, 0.07);
            color: var(--dd-primary);
            font-size: 1.4rem;
            margin-bottom: 14px;
            transition: all var(--dd-transition);
        }

        .dd-stat-card:hover .dd-stat-icon {
            background: var(--dd-primary);
            color: #ffffff;
            transform: scale(1.05);
        }

        .dd-stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--dd-text);
            letter-spacing: -0.5px;
            margin-bottom: 4px;
        }

        .dd-stat-label {
            font-size: 0.88rem;
            color: var(--dd-muted);
            font-weight: 500;
        }

        /* ========== INSIGHT REPORT CARDS ========== */
        .dd-report-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .dd-report-card {
            background: var(--dd-surface);
            border-radius: var(--dd-radius-lg);
            overflow: hidden;
            border: 1px solid var(--dd-border);
            box-shadow: var(--dd-shadow-sm);
            transition: all var(--dd-transition);
            display: flex;
            flex-direction: column;
        }

        .dd-report-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--dd-shadow-lg);
            border-color: transparent;
        }

        .dd-report-thumb {
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
        }

        .dd-report-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .dd-report-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(245, 158, 11, 0.12);
            color: #b45309;
            margin-bottom: 10px;
            align-self: flex-start;
        }

        .dd-report-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--dd-text);
            margin-bottom: 8px;
            line-height: 1.45;
        }

        .dd-report-excerpt {
            font-size: 0.9rem;
            color: var(--dd-muted);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }

        .dd-report-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--dd-muted);
            padding-top: 12px;
            border-top: 1px solid var(--dd-border-light);
        }

        .dd-report-link {
            font-weight: 600;
            color: var(--dd-primary);
            font-size: 0.85rem;
            transition: color var(--dd-transition);
        }

        .dd-report-link:hover {
            color: var(--dd-primary-dark);
        }

        .dd-report-link i {
            margin-left: 4px;
            font-size: 0.75rem;
            transition: transform var(--dd-transition);
        }

        .dd-report-link:hover i {
            transform: translateX(3px);
        }

        /* ========== CAPABILITY CARDS ========== */
        .dd-capability-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .dd-capability-card {
            background: var(--dd-surface);
            border-radius: var(--dd-radius-lg);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--dd-border);
            box-shadow: var(--dd-shadow-sm);
            transition: all var(--dd-transition);
        }

        .dd-capability-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--dd-shadow-lg);
            border-color: transparent;
            background: var(--dd-primary);
            color: #ffffff;
        }

        .dd-capability-card:hover .dd-capability-icon {
            background: rgba(255, 255, 255, 0.2);
            color: #ffffff;
        }

        .dd-capability-card:hover .dd-capability-title {
            color: #ffffff;
        }

        .dd-capability-card:hover .dd-capability-desc {
            color: rgba(255, 255, 255, 0.8);
        }

        .dd-capability-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: var(--dd-radius);
            background: rgba(30, 64, 175, 0.07);
            color: var(--dd-primary);
            font-size: 1.5rem;
            margin-bottom: 16px;
            transition: all var(--dd-transition);
        }

        .dd-capability-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--dd-text);
            margin-bottom: 8px;
            transition: color var(--dd-transition);
        }

        .dd-capability-desc {
            font-size: 0.88rem;
            color: var(--dd-muted);
            line-height: 1.6;
            transition: color var(--dd-transition);
        }

        /* ========== PROCESS STEPS ========== */
        .dd-process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .dd-process-step {
            text-align: center;
            position: relative;
            padding: 28px 20px;
            background: var(--dd-surface);
            border-radius: var(--dd-radius-lg);
            border: 1px solid var(--dd-border);
            box-shadow: var(--dd-shadow-sm);
            transition: all var(--dd-transition);
        }

        .dd-process-step:hover {
            transform: translateY(-3px);
            box-shadow: var(--dd-shadow-lg);
            border-color: transparent;
        }

        .dd-process-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--dd-primary);
            color: #ffffff;
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 14px;
        }

        .dd-process-step-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--dd-text);
            margin-bottom: 6px;
        }

        .dd-process-step-desc {
            font-size: 0.85rem;
            color: var(--dd-muted);
            line-height: 1.6;
        }

        .dd-process-connector {
            display: none;
        }

        /* ========== FAQ ========== */
        .dd-faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .dd-faq-item {
            background: var(--dd-surface);
            border-radius: var(--dd-radius);
            border: 1px solid var(--dd-border);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--dd-transition);
        }

        .dd-faq-item:hover {
            border-color: var(--dd-primary-light);
        }

        .dd-faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            background: none;
            border: none;
            font-size: 1rem;
            font-weight: 600;
            color: var(--dd-text);
            text-align: left;
            cursor: pointer;
            transition: all var(--dd-transition);
            gap: 16px;
        }

        .dd-faq-question:hover {
            color: var(--dd-primary);
        }

        .dd-faq-question i {
            flex-shrink: 0;
            transition: transform var(--dd-transition);
            color: var(--dd-muted);
            font-size: 0.85rem;
        }

        .dd-faq-item.open .dd-faq-question i {
            transform: rotate(180deg);
            color: var(--dd-primary);
        }

        .dd-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }

        .dd-faq-item.open .dd-faq-answer {
            max-height: 500px;
        }

        .dd-faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 0.9rem;
            color: var(--dd-text-secondary);
            line-height: 1.75;
        }

        /* ========== CTA SECTION ========== */
        .dd-cta-section {
            background: linear-gradient(135deg, var(--dd-primary) 0%, var(--dd-primary-dark) 100%);
            padding: 56px 0;
            text-align: center;
            border-radius: var(--dd-radius-xl);
            margin: 0 20px;
        }

        .dd-cta-wrapper {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .dd-cta-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 10px;
        }

        .dd-cta-desc {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 28px;
            max-width: 540px;
            margin-left: auto;
            margin-right: auto;
        }

        .dd-btn-cta {
            display: inline-block;
            padding: 14px 36px;
            border-radius: var(--dd-radius-sm);
            font-weight: 700;
            font-size: 1rem;
            background: var(--dd-accent);
            color: #1e293b;
            border: none;
            transition: all var(--dd-transition);
            box-shadow: 0 4px 18px rgba(245, 158, 11, 0.4);
        }

        .dd-btn-cta:hover {
            background: #ffffff;
            color: var(--dd-primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 255, 255, 0.3);
        }

        .dd-btn-outline-light {
            display: inline-block;
            padding: 14px 36px;
            border-radius: var(--dd-radius-sm);
            font-weight: 700;
            font-size: 1rem;
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255, 255, 255, 0.5);
            transition: all var(--dd-transition);
            margin-left: 12px;
        }

        .dd-btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #ffffff;
            color: #ffffff;
        }

        /* ========== FOOTER ========== */
        .dd-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 32px;
            margin-top: var(--dd-section-gap);
        }

        .dd-footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .dd-footer h5 {
            color: #ffffff;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 14px;
        }

        .dd-footer p {
            font-size: 0.9rem;
            line-height: 1.7;
            margin: 0;
        }

        .dd-footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .dd-footer-links li {
            margin-bottom: 8px;
        }

        .dd-footer-links li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: color var(--dd-transition);
        }

        .dd-footer-links li a:hover {
            color: var(--dd-accent);
        }

        .dd-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .dd-stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .dd-capability-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .dd-process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .dd-report-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .dd-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .dd-page-banner {
                padding: 60px 0 52px;
            }
            .dd-page-banner-title {
                font-size: 2rem;
            }
            .dd-section {
                padding: 56px 0;
            }
            .dd-section-title {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 768px) {
            .dd-mobile-toggle {
                display: block;
            }

            .dd-nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: #ffffff;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 16px 20px;
                gap: 2px;
                border-bottom: 1px solid var(--dd-border);
                box-shadow: var(--dd-shadow-lg);
                display: none;
                z-index: 1040;
            }

            .dd-nav-links.show {
                display: flex;
            }

            .dd-nav-links li a {
                padding: 12px 16px;
                border-radius: var(--dd-radius-sm);
                font-size: 1rem;
            }

            .dd-nav-links .dd-nav-cta-mobile {
                display: block !important;
                text-align: center;
                margin-top: 8px;
            }

            .dd-nav-cta {
                display: none;
            }

            .dd-stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .dd-capability-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .dd-process-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .dd-report-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .dd-report-thumb {
                height: 180px;
            }
            .dd-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .dd-page-banner {
                padding: 48px 0 40px;
            }
            .dd-page-banner-title {
                font-size: 1.7rem;
            }
            .dd-page-banner-desc {
                font-size: 0.95rem;
            }
            .dd-section {
                padding: 40px 0;
            }
            .dd-section-title {
                font-size: 1.4rem;
            }
            .dd-section-header {
                margin-bottom: 32px;
            }
            .dd-stat-number {
                font-size: 1.5rem;
            }
            .dd-cta-section {
                padding: 40px 20px;
                border-radius: var(--dd-radius-lg);
                margin: 0 12px;
            }
            .dd-cta-title {
                font-size: 1.4rem;
            }
            .dd-btn-outline-light {
                margin-left: 0;
                margin-top: 10px;
            }
        }

        @media (max-width: 520px) {
            .dd-stat-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .dd-capability-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .dd-process-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .dd-report-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .dd-report-thumb {
                height: 160px;
            }
            .dd-page-banner-title {
                font-size: 1.5rem;
            }
            .dd-stat-card {
                padding: 20px 16px;
            }
            .dd-capability-card {
                padding: 24px 16px;
            }
            .dd-process-step {
                padding: 20px 16px;
            }
            .dd-section-title {
                font-size: 1.2rem;
            }
            .dd-navbar {
                height: 56px;
            }
            .dd-nav-links {
                top: 56px;
            }
            .dd-logo {
                font-size: 1.1rem;
            }
            .dd-logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.85rem;
            }
        }

/* roulang page: category1 */
:root {
            --dd-primary: #1a3a5c;
            --dd-primary-dark: #0f2740;
            --dd-accent: #e8782a;
            --dd-accent-hover: #c95f1c;
            --dd-accent-light: #fef0e6;
            --dd-surface: #ffffff;
            --dd-bg: #f7f8fa;
            --dd-bg-alt: #edf1f5;
            --dd-text: #1e293b;
            --dd-text-secondary: #5c6b7d;
            --dd-text-muted: #8896a7;
            --dd-border: #dde2e8;
            --dd-border-light: #e8ecf1;
            --dd-radius-sm: 8px;
            --dd-radius: 12px;
            --dd-radius-lg: 18px;
            --dd-radius-xl: 24px;
            --dd-shadow-sm: 0 1px 3px rgba(15, 39, 64, 0.06);
            --dd-shadow: 0 4px 16px rgba(15, 39, 64, 0.08);
            --dd-shadow-lg: 0 12px 36px rgba(15, 39, 64, 0.12);
            --dd-shadow-xl: 0 20px 50px rgba(15, 39, 64, 0.16);
            --dd-transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
            --dd-font-stack: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --dd-section-gap: 80px;
            --dd-section-gap-md: 56px;
            --dd-section-gap-sm: 40px;
            --dd-container-max: 1200px;
            --dd-nav-height: 72px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--dd-font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--dd-text);
            background-color: var(--dd-bg);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--dd-transition);
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        select,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: var(--dd-container-max);
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== HEADER / NAV ========== */
        .dd-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--dd-border-light);
            box-shadow: var(--dd-shadow-sm);
            min-height: var(--dd-nav-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--dd-transition);
        }
        .dd-header.scrolled {
            box-shadow: var(--dd-shadow);
        }
        .dd-navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 28px;
            flex-wrap: nowrap;
        }
        .dd-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--dd-primary);
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: opacity var(--dd-transition);
            flex-shrink: 0;
        }
        .dd-logo:hover {
            opacity: 0.84;
            color: var(--dd-primary);
        }
        .dd-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--dd-radius-sm);
            background: linear-gradient(135deg, var(--dd-accent), #f59e4b);
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
            letter-spacing: 0;
            flex-shrink: 0;
        }
        .dd-nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: nowrap;
        }
        .dd-nav-links li a {
            display: inline-block;
            padding: 10px 16px;
            border-radius: var(--dd-radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--dd-text-secondary);
            white-space: nowrap;
            transition: all var(--dd-transition);
            position: relative;
        }
        .dd-nav-links li a:hover,
        .dd-nav-links li a:focus-visible {
            color: var(--dd-primary);
            background: var(--dd-bg-alt);
            outline: none;
        }
        .dd-nav-links li a.active-link,
        .dd-nav-links li a[aria-current="page"] {
            color: var(--dd-accent);
            font-weight: 600;
            background: var(--dd-accent-light);
        }
        .dd-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            background: var(--dd-accent);
            color: #fff;
            border: none;
            white-space: nowrap;
            transition: all var(--dd-transition);
            flex-shrink: 0;
            letter-spacing: 0.01em;
        }
        .dd-nav-cta:hover {
            background: var(--dd-accent-hover);
            color: #fff;
            box-shadow: 0 6px 18px rgba(232, 120, 42, 0.3);
            transform: translateY(-1px);
        }
        .dd-mobile-toggle {
            display: none;
            background: none;
            border: 2px solid var(--dd-border);
            border-radius: var(--dd-radius-sm);
            padding: 8px 12px;
            font-size: 1.3rem;
            color: var(--dd-text);
            transition: all var(--dd-transition);
            flex-shrink: 0;
        }
        .dd-mobile-toggle:hover {
            border-color: var(--dd-accent);
            color: var(--dd-accent);
        }

        @media (max-width: 1024px) {
            .dd-nav-links {
                gap: 0;
            }
            .dd-nav-links li a {
                padding: 8px 11px;
                font-size: 0.9rem;
            }
            .dd-nav-cta {
                padding: 9px 16px;
                font-size: 0.88rem;
            }
            .dd-logo {
                font-size: 1.2rem;
            }
            .dd-logo-icon {
                width: 34px;
                height: 34px;
                font-size: 0.85rem;
            }
        }
        @media (max-width: 768px) {
            .dd-nav-links {
                display: none;
                position: absolute;
                top: var(--dd-nav-height);
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 16px;
                border-bottom: 2px solid var(--dd-border);
                box-shadow: var(--dd-shadow-lg);
                gap: 4px;
                z-index: 1040;
            }
            .dd-nav-links.open {
                display: flex;
            }
            .dd-nav-links li a {
                display: block;
                padding: 12px 16px;
                border-radius: var(--dd-radius-sm);
                font-size: 0.95rem;
            }
            .dd-mobile-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .dd-nav-cta {
                display: none;
            }
            .dd-nav-cta-mobile {
                display: inline-flex !important;
            }
        }
        @media (max-width: 520px) {
            .dd-logo {
                font-size: 1.08rem;
                gap: 7px;
            }
            .dd-logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.78rem;
            }
            .dd-nav-links li a {
                font-size: 0.9rem;
                padding: 10px 14px;
            }
        }

        /* ========== PAGE BANNER ========== */
        .dd-page-banner {
            position: relative;
            background: linear-gradient(160deg, #1a3a5c 0%, #0f2740 55%, #1a3a3a 100%);
            color: #fff;
            padding: 72px 0 64px;
            overflow: hidden;
            isolation: isolate;
        }
        .dd-page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
            z-index: 0;
        }
        .dd-page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--dd-bg) 0%, transparent 100%);
            z-index: 1;
        }
        .dd-page-banner .container {
            position: relative;
            z-index: 2;
        }
        .dd-breadcrumb-row {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .dd-breadcrumb-row a {
            color: rgba(255, 255, 255, 0.8);
            transition: color var(--dd-transition);
        }
        .dd-breadcrumb-row a:hover {
            color: #fff;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .dd-breadcrumb-row .sep {
            color: rgba(255, 255, 255, 0.45);
            font-size: 0.75rem;
        }
        .dd-breadcrumb-row .current {
            color: #fff;
            font-weight: 600;
        }
        .dd-page-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            margin-bottom: 12px;
            line-height: 1.25;
        }
        .dd-page-banner .dd-banner-sub {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.82);
            max-width: 680px;
            line-height: 1.65;
        }
        @media (max-width: 768px) {
            .dd-page-banner {
                padding: 48px 0 40px;
            }
            .dd-page-banner h1 {
                font-size: 1.9rem;
            }
            .dd-page-banner .dd-banner-sub {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .dd-page-banner h1 {
                font-size: 1.5rem;
            }
        }

        /* ========== SECTIONS ========== */
        .dd-section {
            padding: var(--dd-section-gap) 0;
        }
        @media (max-width: 768px) {
            .dd-section {
                padding: var(--dd-section-gap-md) 0;
            }
        }
        @media (max-width: 520px) {
            .dd-section {
                padding: var(--dd-section-gap-sm) 0;
            }
        }
        .dd-section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--dd-primary);
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }
        .dd-section-subtitle {
            font-size: 0.98rem;
            color: var(--dd-text-secondary);
            margin-bottom: 36px;
            max-width: 600px;
        }
        .dd-section-header {
            margin-bottom: 32px;
        }
        .dd-section-header.text-center .dd-section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== EVENT CARDS ========== */
        .dd-event-card {
            background: var(--dd-surface);
            border-radius: var(--dd-radius-lg);
            overflow: hidden;
            box-shadow: var(--dd-shadow);
            transition: all var(--dd-transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            border: 1px solid var(--dd-border-light);
        }
        .dd-event-card:hover {
            box-shadow: var(--dd-shadow-lg);
            transform: translateY(-4px);
            border-color: var(--dd-border);
        }
        .dd-event-card-img {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--dd-bg-alt);
        }
        .dd-event-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .dd-event-card:hover .dd-event-card-img img {
            transform: scale(1.04);
        }
        .dd-event-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            display: inline-block;
            padding: 5px 13px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            z-index: 2;
        }
        .dd-tag-hot {
            background: #fde8e8;
            color: #c0392b;
        }
        .dd-tag-upcoming {
            background: #e8f4fd;
            color: #1a6fb5;
        }
        .dd-tag-live {
            background: #e8fdf0;
            color: #1a7a3a;
            animation: dd-pulse-dot 1.6s infinite;
        }
        @keyframes dd-pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.6;
            }
        }
        .dd-event-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .dd-event-card-body h3 {
            font-size: 1.12rem;
            font-weight: 700;
            color: var(--dd-text);
            line-height: 1.4;
            margin: 0;
        }
        .dd-event-card-body h3 a {
            color: inherit;
            transition: color var(--dd-transition);
        }
        .dd-event-card-body h3 a:hover {
            color: var(--dd-accent);
        }
        .dd-event-meta {
            font-size: 0.84rem;
            color: var(--dd-text-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }
        .dd-event-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .dd-event-excerpt {
            font-size: 0.9rem;
            color: var(--dd-text-secondary);
            line-height: 1.55;
            flex: 1;
        }
        .dd-event-card-body .dd-btn-sm {
            align-self: flex-start;
            margin-top: 4px;
        }

        /* ========== BUTTONS ========== */
        .dd-btn {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 12px 26px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            transition: all var(--dd-transition);
            letter-spacing: 0.01em;
            cursor: pointer;
            text-align: center;
            justify-content: center;
        }
        .dd-btn-primary {
            background: var(--dd-accent);
            color: #fff;
        }
        .dd-btn-primary:hover {
            background: var(--dd-accent-hover);
            box-shadow: 0 8px 22px rgba(232, 120, 42, 0.32);
            transform: translateY(-2px);
            color: #fff;
        }
        .dd-btn-outline {
            background: transparent;
            color: var(--dd-primary);
            border: 2px solid var(--dd-border);
        }
        .dd-btn-outline:hover {
            border-color: var(--dd-accent);
            color: var(--dd-accent);
            background: var(--dd-accent-light);
            transform: translateY(-2px);
        }
        .dd-btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: 50px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: all var(--dd-transition);
            background: var(--dd-accent-light);
            color: var(--dd-accent);
            border: none;
        }
        .dd-btn-sm:hover {
            background: var(--dd-accent);
            color: #fff;
            box-shadow: 0 4px 12px rgba(232, 120, 42, 0.25);
            transform: translateY(-1px);
        }

        /* ========== STATS ROW ========== */
        .dd-stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .dd-stat-card {
            background: var(--dd-surface);
            border-radius: var(--dd-radius-lg);
            padding: 28px 22px;
            text-align: center;
            box-shadow: var(--dd-shadow-sm);
            border: 1px solid var(--dd-border-light);
            transition: all var(--dd-transition);
        }
        .dd-stat-card:hover {
            box-shadow: var(--dd-shadow);
            transform: translateY(-3px);
        }
        .dd-stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--dd-accent);
            letter-spacing: 0.02em;
            line-height: 1.1;
        }
        .dd-stat-label {
            font-size: 0.9rem;
            color: var(--dd-text-secondary);
            margin-top: 6px;
        }
        @media (max-width: 768px) {
            .dd-stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .dd-stat-number {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 520px) {
            .dd-stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .dd-stat-card {
                padding: 20px 14px;
            }
            .dd-stat-number {
                font-size: 1.5rem;
            }
        }

        /* ========== TIMELINE ========== */
        .dd-timeline {
            position: relative;
            padding-left: 32px;
            border-left: 3px solid var(--dd-border);
            margin-left: 10px;
        }
        .dd-timeline-item {
            position: relative;
            margin-bottom: 28px;
            padding-left: 20px;
        }
        .dd-timeline-item::before {
            content: '';
            position: absolute;
            left: -42px;
            top: 5px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--dd-accent);
            border: 3px solid #fff;
            box-shadow: 0 0 0 3px var(--dd-accent);
        }
        .dd-timeline-item .dd-timeline-date {
            font-size: 0.84rem;
            font-weight: 700;
            color: var(--dd-accent);
            letter-spacing: 0.03em;
            margin-bottom: 4px;
        }
        .dd-timeline-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--dd-text);
            margin: 0 0 4px;
        }
        .dd-timeline-item p {
            font-size: 0.9rem;
            color: var(--dd-text-secondary);
            margin: 0;
        }
        @media (max-width: 520px) {
            .dd-timeline {
                padding-left: 22px;
                margin-left: 4px;
            }
            .dd-timeline-item {
                padding-left: 10px;
            }
            .dd-timeline-item::before {
                left: -30px;
                width: 12px;
                height: 12px;
            }
        }

        /* ========== TABLE WRAPPER ========== */
        .dd-table-wrap {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            border-radius: var(--dd-radius-lg);
            box-shadow: var(--dd-shadow);
            background: var(--dd-surface);
            border: 1px solid var(--dd-border-light);
        }
        .dd-table-wrap table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }
        .dd-table-wrap thead th {
            background: var(--dd-primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            padding: 14px 18px;
            text-align: left;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .dd-table-wrap tbody td {
            padding: 13px 18px;
            font-size: 0.92rem;
            border-bottom: 1px solid var(--dd-border-light);
            color: var(--dd-text);
            vertical-align: middle;
        }
        .dd-table-wrap tbody tr:hover {
            background: var(--dd-bg-alt);
        }
        .dd-table-wrap tbody tr:last-child td {
            border-bottom: none;
        }
        .dd-badge-status {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .dd-badge-ongoing {
            background: #fef3e2;
            color: #c0731a;
        }
        .dd-badge-done {
            background: #e8f4e8;
            color: #2d6a2d;
        }
        .dd-badge-soon {
            background: #e2eefb;
            color: #1a508b;
        }

        /* ========== FAQ ========== */
        .dd-faq-item {
            border: 1px solid var(--dd-border-light);
            border-radius: var(--dd-radius);
            margin-bottom: 12px;
            background: var(--dd-surface);
            overflow: hidden;
            transition: all var(--dd-transition);
        }
        .dd-faq-item:hover {
            box-shadow: var(--dd-shadow-sm);
        }
        .dd-faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 22px;
            text-align: left;
            font-weight: 600;
            font-size: 1rem;
            color: var(--dd-text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            cursor: pointer;
            transition: color var(--dd-transition);
            letter-spacing: 0.01em;
        }
        .dd-faq-question:hover {
            color: var(--dd-accent);
        }
        .dd-faq-question i {
            transition: transform 0.3s ease;
            color: var(--dd-text-muted);
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .dd-faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
            color: var(--dd-accent);
        }
        .dd-faq-answer {
            padding: 0 22px 18px;
            font-size: 0.92rem;
            color: var(--dd-text-secondary);
            line-height: 1.7;
            display: none;
        }
        .dd-faq-answer.open {
            display: block;
        }

        /* ========== CTA SECTION ========== */
        .dd-cta-section {
            background: linear-gradient(150deg, #1a3a5c 0%, #0f2740 60%, #1e2a3a 100%);
            color: #fff;
            padding: 64px 0;
            text-align: center;
            border-radius: var(--dd-radius-xl);
            position: relative;
            overflow: hidden;
            isolation: isolate;
        }
        .dd-cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: 0;
        }
        .dd-cta-section .container {
            position: relative;
            z-index: 1;
        }
        .dd-cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            margin-bottom: 10px;
        }
        .dd-cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.78);
            max-width: 550px;
            margin: 0 auto 28px;
            line-height: 1.6;
        }
        @media (max-width: 520px) {
            .dd-cta-section {
                padding: 44px 16px;
                border-radius: var(--dd-radius-lg);
            }
            .dd-cta-section h2 {
                font-size: 1.5rem;
            }
        }

        /* ========== FOOTER ========== */
        .dd-footer {
            background: #0f1e2e;
            color: #c8d2dc;
            padding: 52px 0 24px;
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .dd-footer h5 {
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .dd-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 28px;
        }
        .dd-footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .dd-footer-links li {
            margin-bottom: 7px;
        }
        .dd-footer-links li a {
            color: #a0b0c0;
            transition: color var(--dd-transition);
            font-size: 0.88rem;
        }
        .dd-footer-links li a:hover {
            color: #fff;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .dd-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 18px;
            text-align: center;
            font-size: 0.82rem;
            color: #7a8a9a;
        }
        @media (max-width: 768px) {
            .dd-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .dd-footer-grid>div:first-child {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .dd-footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

/* roulang page: category3 */
:root {
            --dd-primary: #1B3A5C;
            --dd-primary-dark: #0F2840;
            --dd-primary-light: #2A5A8A;
            --dd-accent: #D4940E;
            --dd-accent-light: #F0B840;
            --dd-accent-soft: #FFF8E7;
            --dd-bg: #F7F8FA;
            --dd-white: #FFFFFF;
            --dd-text: #1E293B;
            --dd-text-secondary: #475569;
            --dd-text-light: #64748B;
            --dd-border: #E4E8EE;
            --dd-border-light: #F0F2F5;
            --dd-radius-xl: 20px;
            --dd-radius-lg: 14px;
            --dd-radius: 10px;
            --dd-radius-sm: 8px;
            --dd-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --dd-shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
            --dd-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.10);
            --dd-shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --dd-transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --dd-font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --dd-section-gap: 80px;
            --dd-section-gap-md: 56px;
            --dd-section-gap-sm: 40px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--dd-font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--dd-text);
            background-color: var(--dd-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--dd-transition);
        }
        a:hover {
            color: var(--dd-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0;
            line-height: 1.35;
            font-weight: 700;
            color: var(--dd-text);
        }
        p {
            margin: 0;
            color: var(--dd-text-secondary);
        }
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        @media (min-width: 1400px) {
            .container {
                max-width: 1280px;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== HEADER / NAV ========== */
        .dd-header {
            background: var(--dd-white);
            border-bottom: 1px solid var(--dd-border);
            position: sticky;
            top: 0;
            z-index: 1050;
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }
        .dd-navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 66px;
            gap: 28px;
        }
        .dd-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--dd-primary);
            white-space: nowrap;
            flex-shrink: 0;
            transition: opacity var(--dd-transition);
        }
        .dd-logo:hover {
            opacity: 0.85;
            color: var(--dd-primary);
        }
        .dd-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--dd-primary);
            color: var(--dd-white);
            border-radius: var(--dd-radius-sm);
            font-size: 1.1rem;
            font-weight: 800;
            letter-spacing: -1px;
            flex-shrink: 0;
        }
        .dd-nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
            flex-wrap: nowrap;
        }
        .dd-nav-links li a {
            display: block;
            padding: 8px 16px;
            border-radius: var(--dd-radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--dd-text-secondary);
            white-space: nowrap;
            transition: all var(--dd-transition);
            position: relative;
        }
        .dd-nav-links li a:hover {
            color: var(--dd-primary);
            background: #F1F5F9;
        }
        .dd-nav-links li a.active-link {
            color: var(--dd-primary);
            font-weight: 600;
            background: #EEF2F7;
        }
        .dd-nav-links li a.active-link::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 16px;
            right: 16px;
            height: 3px;
            background: var(--dd-accent);
            border-radius: 3px 3px 0 0;
        }
        .dd-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            background: var(--dd-accent);
            color: #fff !important;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--dd-transition);
            box-shadow: 0 4px 14px rgba(212, 148, 14, 0.28);
        }
        .dd-nav-cta:hover {
            background: #c7870c;
            box-shadow: 0 6px 20px rgba(212, 148, 14, 0.4);
            transform: translateY(-1px);
            color: #fff !important;
        }
        .dd-mobile-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--dd-primary);
            padding: 8px;
            border-radius: var(--dd-radius-sm);
            transition: background var(--dd-transition);
            line-height: 1;
        }
        .dd-mobile-toggle:hover {
            background: #F1F5F9;
        }

        @media (max-width: 992px) {
            .dd-nav-links {
                position: fixed;
                top: 66px;
                left: 0;
                right: 0;
                background: var(--dd-white);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 12px 16px;
                border-bottom: 2px solid var(--dd-border);
                box-shadow: var(--dd-shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all var(--dd-transition);
                z-index: 1049;
            }
            .dd-nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .dd-nav-links li a {
                padding: 14px 16px;
                border-radius: var(--dd-radius-sm);
                font-size: 1rem;
                border-bottom: 1px solid var(--dd-border-light);
            }
            .dd-nav-links li:last-child a {
                border-bottom: none;
            }
            .dd-nav-links li a.active-link::after {
                display: none;
            }
            .dd-nav-links li a.active-link {
                background: #EEF2F7;
                border-radius: var(--dd-radius-sm);
            }
            .dd-nav-cta {
                display: none !important;
            }
            .dd-nav-cta-mobile {
                display: flex !important;
                justify-content: center;
                margin-top: 6px;
                border-radius: var(--dd-radius-sm) !important;
                font-size: 0.95rem !important;
                padding: 13px 20px !important;
            }
            .dd-mobile-toggle {
                display: block;
            }
        }
        @media (max-width: 520px) {
            .dd-navbar {
                height: 58px;
                gap: 16px;
            }
            .dd-logo {
                font-size: 1.15rem;
                gap: 7px;
            }
            .dd-logo-icon {
                width: 34px;
                height: 34px;
                font-size: 0.95rem;
            }
            .dd-nav-links {
                top: 58px;
            }
            .dd-mobile-toggle {
                font-size: 1.3rem;
                padding: 6px;
            }
        }

        /* ========== MAIN ========== */
        .dd-main {
            flex: 1;
        }

        /* ========== INNER BANNER ========== */
        .dd-inner-banner {
            position: relative;
            background: var(--dd-primary-dark) url('assets/images/backpic/back-2.webp') center/cover no-repeat;
            padding: 90px 0;
            min-height: 380px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .dd-inner-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 40, 64, 0.88) 0%, rgba(27, 58, 92, 0.78) 50%, rgba(15, 40, 64, 0.85) 100%);
            z-index: 1;
        }
        .dd-inner-banner .container {
            position: relative;
            z-index: 2;
        }
        .dd-inner-banner-content {
            max-width: 720px;
        }
        .dd-banner-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 18px;
            letter-spacing: 0.8px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.18);
        }
        .dd-inner-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
            line-height: 1.25;
        }
        .dd-inner-banner .dd-banner-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.75;
            max-width: 600px;
        }
        .dd-breadcrumb-row {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-top: 20px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.7);
        }
        .dd-breadcrumb-row a {
            color: rgba(255, 255, 255, 0.8);
        }
        .dd-breadcrumb-row a:hover {
            color: #fff;
            text-decoration: underline;
        }
        .dd-breadcrumb-row .dd-breadcrumb-sep {
            font-size: 0.7rem;
            opacity: 0.6;
        }
        @media (max-width: 768px) {
            .dd-inner-banner {
                padding: 56px 0;
                min-height: 280px;
            }
            .dd-inner-banner h1 {
                font-size: 2rem;
            }
            .dd-inner-banner .dd-banner-desc {
                font-size: 0.95rem;
            }
        }
        @media (max-width: 520px) {
            .dd-inner-banner {
                padding: 40px 0;
                min-height: 240px;
            }
            .dd-inner-banner h1 {
                font-size: 1.6rem;
            }
            .dd-inner-banner .dd-banner-desc {
                font-size: 0.88rem;
            }
            .dd-banner-badge {
                font-size: 0.78rem;
                padding: 4px 12px;
            }
        }

        /* ========== SECTIONS ========== */
        .dd-section {
            padding: var(--dd-section-gap) 0;
        }
        .dd-section-alt {
            background: var(--dd-white);
        }
        .dd-section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .dd-section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--dd-text);
            margin-bottom: 10px;
            letter-spacing: -0.3px;
        }
        .dd-section-header .dd-section-subtitle {
            font-size: 1rem;
            color: var(--dd-text-light);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .dd-section-header .dd-section-line {
            display: inline-block;
            width: 48px;
            height: 3px;
            background: var(--dd-accent);
            border-radius: 3px;
            margin-top: 12px;
        }
        @media (max-width: 768px) {
            .dd-section {
                padding: var(--dd-section-gap-md) 0;
            }
            .dd-section-header h2 {
                font-size: 1.6rem;
            }
            .dd-section-header {
                margin-bottom: 32px;
            }
        }
        @media (max-width: 520px) {
            .dd-section {
                padding: var(--dd-section-gap-sm) 0;
            }
            .dd-section-header h2 {
                font-size: 1.35rem;
            }
        }

        /* ========== SERVICE OVERVIEW CARDS ========== */
        .dd-overview-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .dd-overview-card {
            background: var(--dd-white);
            border-radius: var(--dd-radius-lg);
            padding: 30px 26px;
            text-align: center;
            box-shadow: var(--dd-shadow-sm);
            border: 1px solid var(--dd-border-light);
            transition: all var(--dd-transition);
            position: relative;
            overflow: hidden;
        }
        .dd-overview-card:hover {
            box-shadow: var(--dd-shadow-lg);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .dd-overview-card .dd-ov-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--dd-accent-soft);
            color: var(--dd-accent);
            font-size: 1.5rem;
            margin-bottom: 16px;
            transition: all var(--dd-transition);
        }
        .dd-overview-card:hover .dd-ov-icon {
            background: var(--dd-accent);
            color: #fff;
            transform: scale(1.08);
        }
        .dd-overview-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dd-text);
        }
        .dd-overview-card p {
            font-size: 0.9rem;
            color: var(--dd-text-light);
            line-height: 1.6;
        }
        .dd-ov-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--dd-primary);
            line-height: 1;
            margin-bottom: 4px;
        }
        .dd-ov-label {
            font-size: 0.85rem;
            color: var(--dd-text-light);
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .dd-overview-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .dd-overview-card {
                padding: 22px 16px;
            }
            .dd-ov-number {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 520px) {
            .dd-overview-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .dd-overview-card {
                padding: 20px 18px;
            }
        }

        /* ========== SERVICE CARDS GRID ========== */
        .dd-service-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .dd-service-card {
            background: var(--dd-white);
            border-radius: var(--dd-radius-xl);
            overflow: hidden;
            box-shadow: var(--dd-shadow);
            border: 1px solid var(--dd-border-light);
            transition: all var(--dd-transition);
            display: flex;
            flex-direction: column;
        }
        .dd-service-card:hover {
            box-shadow: var(--dd-shadow-xl);
            transform: translateY(-5px);
            border-color: transparent;
        }
        .dd-service-card-img {
            height: 220px;
            overflow: hidden;
            position: relative;
        }
        .dd-service-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .dd-service-card:hover .dd-service-card-img img {
            transform: scale(1.06);
        }
        .dd-service-card-body {
            padding: 24px 22px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .dd-service-card-tag {
            display: inline-block;
            background: var(--dd-accent-soft);
            color: var(--dd-accent);
            font-size: 0.78rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 14px;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .dd-service-card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dd-text);
        }
        .dd-service-card-body p {
            font-size: 0.92rem;
            color: var(--dd-text-light);
            line-height: 1.65;
            flex: 1;
            margin-bottom: 16px;
        }
        .dd-service-card-features {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 16px;
        }
        .dd-service-card-features span {
            font-size: 0.82rem;
            background: #F1F5F9;
            color: var(--dd-text-secondary);
            padding: 5px 12px;
            border-radius: 16px;
            font-weight: 500;
        }
        .dd-btn-outline-sm {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 20px;
            border: 2px solid var(--dd-primary);
            color: var(--dd-primary);
            border-radius: 25px;
            font-weight: 600;
            font-size: 0.88rem;
            transition: all var(--dd-transition);
            align-self: flex-start;
            background: transparent;
        }
        .dd-btn-outline-sm:hover {
            background: var(--dd-primary);
            color: #fff;
            border-color: var(--dd-primary);
        }
        @media (max-width: 768px) {
            .dd-service-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .dd-service-card-img {
                height: 180px;
            }
            .dd-service-card-body {
                padding: 18px 16px 22px;
            }
            .dd-service-card-body h3 {
                font-size: 1.05rem;
            }
        }
        @media (max-width: 520px) {
            .dd-service-card-img {
                height: 160px;
            }
            .dd-service-card-body {
                padding: 16px 14px 20px;
            }
            .dd-service-card-body p {
                font-size: 0.85rem;
            }
            .dd-btn-outline-sm {
                font-size: 0.82rem;
                padding: 7px 16px;
            }
        }

        /* ========== PROCESS TIMELINE ========== */
        .dd-process-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            position: relative;
        }
        .dd-process-list::before {
            content: '';
            position: absolute;
            top: 44px;
            left: 12%;
            right: 12%;
            height: 3px;
            background: linear-gradient(90deg, var(--dd-accent), var(--dd-primary-light), var(--dd-accent));
            border-radius: 3px;
            z-index: 0;
        }
        .dd-process-item {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 12px;
        }
        .dd-process-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--dd-white);
            border: 3px solid var(--dd-accent);
            color: var(--dd-accent);
            font-size: 1.3rem;
            font-weight: 800;
            margin-bottom: 18px;
            position: relative;
            z-index: 2;
            transition: all var(--dd-transition);
        }
        .dd-process-item:hover .dd-process-num {
            background: var(--dd-accent);
            color: #fff;
            box-shadow: 0 6px 22px rgba(212, 148, 14, 0.35);
            transform: scale(1.1);
        }
        .dd-process-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--dd-text);
        }
        .dd-process-item p {
            font-size: 0.85rem;
            color: var(--dd-text-light);
            line-height: 1.55;
        }
        @media (max-width: 768px) {
            .dd-process-list {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px 16px;
            }
            .dd-process-list::before {
                display: none;
            }
            .dd-process-item {
                padding: 0 8px;
            }
            .dd-process-num {
                width: 48px;
                height: 48px;
                font-size: 1.1rem;
                margin-bottom: 12px;
            }
        }
        @media (max-width: 520px) {
            .dd-process-list {
                grid-template-columns: 1fr 1fr;
                gap: 22px 10px;
            }
            .dd-process-item h4 {
                font-size: 0.9rem;
            }
            .dd-process-item p {
                font-size: 0.8rem;
            }
        }

        /* ========== ADVANTAGE CARDS ========== */
        .dd-adv-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .dd-adv-card {
            background: var(--dd-white);
            border-radius: var(--dd-radius-lg);
            padding: 28px 22px;
            box-shadow: var(--dd-shadow-sm);
            border-left: 4px solid var(--dd-accent);
            transition: all var(--dd-transition);
            position: relative;
        }
        .dd-adv-card:hover {
            box-shadow: var(--dd-shadow-lg);
            transform: translateY(-3px);
            border-left-color: var(--dd-primary);
        }
        .dd-adv-card .dd-adv-icon {
            font-size: 1.8rem;
            color: var(--dd-accent);
            margin-bottom: 14px;
            display: block;
            transition: color var(--dd-transition);
        }
        .dd-adv-card:hover .dd-adv-icon {
            color: var(--dd-primary-light);
        }
        .dd-adv-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dd-text);
        }
        .dd-adv-card p {
            font-size: 0.9rem;
            color: var(--dd-text-light);
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .dd-adv-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .dd-adv-card {
                padding: 22px 16px;
            }
        }
        @media (max-width: 520px) {
            .dd-adv-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .dd-adv-card {
                padding: 18px 16px;
            }
        }

        /* ========== FAQ ========== */
        .dd-faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .dd-faq-item {
            background: var(--dd-white);
            border-radius: var(--dd-radius-lg);
            border: 1px solid var(--dd-border-light);
            overflow: hidden;
            transition: all var(--dd-transition);
            box-shadow: var(--dd-shadow-sm);
        }
        .dd-faq-item:hover {
            box-shadow: var(--dd-shadow);
        }
        .dd-faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--dd-text);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            background: var(--dd-white);
            transition: background var(--dd-transition);
            border: none;
            cursor: pointer;
            line-height: 1.5;
        }
        .dd-faq-question:hover {
            background: #FAFBFC;
        }
        .dd-faq-question .dd-faq-icon {
            flex-shrink: 0;
            transition: transform var(--dd-transition);
            color: var(--dd-accent);
            font-size: 0.9rem;
        }
        .dd-faq-item.open .dd-faq-question .dd-faq-icon {
            transform: rotate(180deg);
        }
        .dd-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 22px;
        }
        .dd-faq-item.open .dd-faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }
        .dd-faq-answer p {
            font-size: 0.92rem;
            color: var(--dd-text-secondary);
            line-height: 1.75;
        }
        @media (max-width: 520px) {
            .dd-faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .dd-faq-answer {
                padding: 0 16px;
            }
            .dd-faq-item.open .dd-faq-answer {
                padding: 0 16px 16px;
            }
            .dd-faq-answer p {
                font-size: 0.85rem;
            }
        }

        /* ========== CTA ========== */
        .dd-cta-section {
            background: linear-gradient(135deg, var(--dd-primary-dark) 0%, var(--dd-primary) 50%, #1a3f5e 100%);
            padding: 64px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .dd-cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.03);
            pointer-events: none;
        }
        .dd-cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.03);
            pointer-events: none;
        }
        .dd-cta-section .container {
            position: relative;
            z-index: 1;
        }
        .dd-cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
        }
        .dd-cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 28px;
            max-width: 540px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.6;
        }
        .dd-btn-accent-lg {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: var(--dd-accent);
            color: #fff;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: all var(--dd-transition);
            box-shadow: 0 6px 22px rgba(212, 148, 14, 0.4);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .dd-btn-accent-lg:hover {
            background: #e6a40f;
            box-shadow: 0 10px 30px rgba(212, 148, 14, 0.55);
            transform: translateY(-2px);
            color: #fff;
        }
        .dd-btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
            border-radius: 30px;
            font-weight: 600;
            font-size: 1.05rem;
            transition: all var(--dd-transition);
            cursor: pointer;
            text-decoration: none;
            margin-left: 12px;
        }
        .dd-btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
        }
        @media (max-width: 520px) {
            .dd-cta-section {
                padding: 44px 0;
            }
            .dd-cta-section h2 {
                font-size: 1.5rem;
            }
            .dd-cta-section p {
                font-size: 0.9rem;
            }
            .dd-btn-accent-lg,
            .dd-btn-outline-white {
                font-size: 0.9rem;
                padding: 12px 24px;
                display: block;
                margin: 0 auto 12px;
                width: fit-content;
            }
            .dd-btn-outline-white {
                margin-left: auto;
            }
        }

        /* ========== FOOTER ========== */
        .dd-footer {
            background: #111827;
            color: #cbd5e1;
            padding: 56px 0 0;
            margin-top: auto;
        }
        .dd-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .dd-footer-grid h5 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .dd-footer-grid p {
            color: #94a3b8;
            font-size: 0.88rem;
            line-height: 1.7;
        }
        .dd-footer-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .dd-footer-links li a {
            color: #94a3b8;
            font-size: 0.88rem;
            transition: color var(--dd-transition);
            padding: 2px 0;
            display: inline-block;
        }
        .dd-footer-links li a:hover {
            color: #f0b840;
        }
        .dd-footer-bottom {
            padding: 18px 0;
            text-align: center;
            font-size: 0.82rem;
            color: #64748b;
        }
        @media (max-width: 768px) {
            .dd-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px 20px;
            }
            .dd-footer-grid > div:first-child {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .dd-footer {
                padding: 40px 0 0;
            }
            .dd-footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .dd-footer-grid > div:first-child {
                grid-column: auto;
            }
        }