/* roulang page: index */
:root {
            --color-primary: #1e3a4a;
            --color-primary-light: #2a5266;
            --color-accent: #4a8c8a;
            --color-accent-light: #5ca09e;
            --color-accent-pale: #e8f2f1;
            --color-bg: #f5f7f8;
            --color-surface: #ffffff;
            --color-text: #1a1f24;
            --color-text-secondary: #5a6470;
            --color-text-muted: #8895a3;
            --color-border: #e2e7ec;
            --color-border-light: #eef1f4;
            --color-success: #3b8c6e;
            --color-warning: #c8943e;
            --color-danger: #c4554d;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", "Courier New", monospace;
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
            --spacing-2xl: 48px;
            --spacing-3xl: 64px;
            --spacing-4xl: 80px;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s ease;
            --container-max: 1200px;
            --container-narrow: 960px;
        }

        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition-fast);
        }
        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
        }

        ul, ol {
            list-style: none;
        }

        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            color: var(--color-primary);
            font-weight: 700;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        .container--narrow {
            max-width: var(--container-narrow);
        }

        /* ========== TOP INFO BAR ========== */
        .top-bar {
            background-color: var(--color-primary);
            color: #ffffff;
            font-size: 0.8rem;
            padding: 6px 0;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .top-bar__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        .top-bar__info {
            display: flex;
            align-items: center;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
            color: rgba(255,255,255,0.85);
        }
        .top-bar__info span {
            display: flex;
            align-items: center;
            gap: 5px;
            white-space: nowrap;
        }
        .top-bar__info .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: #5cb88e;
            display: inline-block;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.6); }
        }
        .top-bar__action {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
        }
        .top-bar__btn {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(255,255,255,0.15);
            color: #ffffff;
            border: 1px solid rgba(255,255,255,0.25);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .top-bar__btn:hover {
            background: rgba(255,255,255,0.25);
            color: #ffffff;
            border-color: rgba(255,255,255,0.45);
        }
        .top-bar__btn--highlight {
            background: var(--color-accent);
            border-color: var(--color-accent);
            color: #fff;
        }
        .top-bar__btn--highlight:hover {
            background: var(--color-accent-light);
            border-color: var(--color-accent-light);
        }

        /* ========== HEADER / MAIN NAV ========== */
        .header {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-xs);
        }
        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 var(--spacing-lg);
            height: 62px;
            gap: var(--spacing-lg);
        }
        .header__logo {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-primary);
            white-space: nowrap;
            text-decoration: none;
            letter-spacing: -0.01em;
        }
        .header__logo:hover {
            color: var(--color-accent);
        }
        .header__logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 2px;
        }
        .nav__link {
            display: inline-flex;
            align-items: center;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.94rem;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav__link:hover {
            color: var(--color-primary);
            background: var(--color-accent-pale);
        }
        .nav__link--active {
            color: var(--color-accent);
            background: var(--color-accent-pale);
        }
        .nav__link--active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 18px;
            right: 18px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
        }
        .nav__cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 20px;
            border-radius: 24px;
            font-weight: 700;
            font-size: 0.9rem;
            background: var(--color-accent);
            color: #ffffff;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            white-space: nowrap;
            margin-left: var(--spacing-sm);
        }
        .nav__cta:hover {
            background: var(--color-primary);
            color: #ffffff;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .nav__toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--color-text);
            border: 1px solid var(--color-border);
            flex-shrink: 0;
        }
        .nav__toggle:hover {
            background: var(--color-bg);
        }

        /* ========== MOBILE NAV ========== */
        .mobile-nav {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            width: 280px;
            max-width: 85vw;
            height: 100vh;
            background: var(--color-surface);
            z-index: 2000;
            box-shadow: var(--shadow-xl);
            padding: var(--spacing-xl) var(--spacing-lg);
            flex-direction: column;
            gap: var(--spacing-sm);
            transform: translateX(100%);
            transition: transform var(--transition-base);
        }
        .mobile-nav--open {
            transform: translateX(0);
        }
        .mobile-nav__overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.5);
            z-index: 1999;
        }
        .mobile-nav__overlay--visible {
            display: block;
        }
        .mobile-nav__close {
            align-self: flex-end;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            border: 1px solid var(--color-border);
            color: var(--color-text);
        }
        .mobile-nav__link {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            color: var(--color-text-secondary);
            font-size: 0.95rem;
        }
        .mobile-nav__link:hover,
        .mobile-nav__link--active {
            background: var(--color-accent-pale);
            color: var(--color-accent);
        }

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

        /* ========== HERO ========== */
        .hero {
            position: relative;
            background: var(--color-primary);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: var(--spacing-4xl) 0;
            color: #ffffff;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30,58,74,0.88) 0%, rgba(30,58,74,0.7) 40%, rgba(74,140,138,0.55) 100%);
            z-index: 1;
        }
        .hero__content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-3xl);
            align-items: center;
        }
        .hero__text {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-lg);
        }
        .hero__badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.12);
            border: 1px solid rgba(255,255,255,0.25);
            border-radius: 30px;
            padding: 7px 18px;
            font-size: 0.85rem;
            font-weight: 600;
            width: fit-content;
            backdrop-filter: blur(6px);
            letter-spacing: 0.02em;
        }
        .hero__badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #5cb88e;
        }
        .hero__title {
            font-size: 2.8rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .hero__title span {
            color: #7dd4c8;
        }
        .hero__desc {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.85);
            max-width: 480px;
            line-height: 1.7;
        }
        .hero__actions {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 28px;
            font-weight: 700;
            font-size: 0.95rem;
            transition: all var(--transition-base);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .btn--primary {
            background: #ffffff;
            color: var(--color-primary);
            box-shadow: var(--shadow-md);
        }
        .btn--primary:hover {
            background: #e8f2f1;
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
            color: var(--color-primary);
        }
        .btn--outline {
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255,255,255,0.5);
        }
        .btn--outline:hover {
            background: rgba(255,255,255,0.1);
            border-color: #ffffff;
            color: #ffffff;
            transform: translateY(-2px);
        }
        .btn--accent {
            background: var(--color-accent);
            color: #ffffff;
            box-shadow: var(--shadow-sm);
        }
        .btn--accent:hover {
            background: var(--color-accent-light);
            color: #ffffff;
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .btn--sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: 22px;
        }
        .hero__visual {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero__stats-card {
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            backdrop-filter: blur(8px);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-lg);
        }
        .hero__stat {
            text-align: center;
        }
        .hero__stat-value {
            font-size: 2.2rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.01em;
        }
        .hero__stat-label {
            font-size: 0.8rem;
            color: rgba(255,255,255,0.7);
            margin-top: 2px;
        }

        /* ========== SECTION ========== */
        .section {
            padding: var(--spacing-4xl) 0;
        }
        .section--alt {
            background: var(--color-surface);
        }
        .section--accent-bg {
            background: var(--color-accent-pale);
        }
        .section__header {
            text-align: center;
            margin-bottom: var(--spacing-3xl);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .section__label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--color-accent);
            background: var(--color-accent-pale);
            padding: 5px 14px;
            border-radius: 20px;
            width: fit-content;
            margin: 0 auto;
        }
        .section__title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.01em;
        }
        .section__desc {
            color: var(--color-text-secondary);
            max-width: 600px;
            margin: 0 auto;
            font-size: 1rem;
        }

        /* ========== FEATURES GRID ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-xl);
        }
        .feature-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            padding: var(--spacing-2xl) var(--spacing-xl);
            text-align: center;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: var(--spacing-md);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-border);
        }
        .feature-card__icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: var(--color-accent-pale);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--color-accent);
            flex-shrink: 0;
        }
        .feature-card__title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-primary);
        }
        .feature-card__desc {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        /* ========== CATEGORY ENTRY ========== */
        .category-entry-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }
        .category-entry__image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .category-entry__image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        .category-entry__info {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-lg);
        }
        .category-entry__tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-accent-pale);
            color: var(--color-accent);
            padding: 6px 14px;
            border-radius: 20px;
            font-weight: 700;
            font-size: 0.82rem;
            width: fit-content;
        }
        .category-entry__title {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--color-primary);
        }
        .category-entry__desc {
            color: var(--color-text-secondary);
            font-size: 0.98rem;
            line-height: 1.7;
        }
        .category-entry__list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .category-entry__list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.93rem;
            color: var(--color-text);
        }
        .category-entry__list li::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-accent);
            flex-shrink: 0;
        }

        /* ========== KPI STRIP ========== */
        .kpi-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }
        .kpi-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl) var(--spacing-lg);
            text-align: center;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .kpi-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .kpi-card__value {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.02em;
            font-variant-numeric: tabular-nums;
            font-family: var(--font-mono);
        }
        .kpi-card__unit {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-accent);
            margin-left: 2px;
        }
        .kpi-card__label {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-top: var(--spacing-xs);
        }
        .kpi-card__trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--color-success);
            margin-top: var(--spacing-sm);
        }
        .kpi-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--color-accent);
            opacity: 0.3;
            border-radius: 0 0 var(--radius-lg) var(--radius-lg);
        }

        /* ========== CMS LIST ========== */
        .cms-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-xl);
        }
        .cms-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-xs);
        }
        .cms-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }
        .cms-card__image {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-bottom: 1px solid var(--color-border-light);
        }
        .cms-card__body {
            padding: var(--spacing-lg);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            flex: 1;
        }
        .cms-card__meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            font-size: 0.78rem;
            color: var(--color-text-muted);
        }
        .cms-card__category {
            display: inline-block;
            background: var(--color-accent-pale);
            color: var(--color-accent);
            padding: 3px 10px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 0.75rem;
        }
        .cms-card__title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.4;
        }
        .cms-card__title a {
            color: inherit;
        }
        .cms-card__title a:hover {
            color: var(--color-accent);
        }
        .cms-card__excerpt {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .cms-empty {
            text-align: center;
            padding: var(--spacing-3xl);
            color: var(--color-text-muted);
            font-size: 1rem;
            grid-column: 1 / -1;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--color-border);
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--color-border);
        }
        .faq-item__question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--spacing-lg);
            font-weight: 700;
            font-size: 1rem;
            color: var(--color-primary);
            text-align: left;
            cursor: pointer;
            gap: var(--spacing-md);
            transition: background var(--transition-fast);
        }
        .faq-item__question:hover {
            background: var(--color-accent-pale);
        }
        .faq-item__icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            flex-shrink: 0;
            transition: all var(--transition-fast);
            color: var(--color-accent);
        }
        .faq-item__answer {
            padding: 0 var(--spacing-lg) var(--spacing-lg);
            color: var(--color-text-secondary);
            font-size: 0.93rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item--open .faq-item__answer {
            display: block;
        }
        .faq-item--open .faq-item__icon {
            background: var(--color-accent);
            color: #fff;
            border-color: var(--color-accent);
            transform: rotate(45deg);
        }

        /* ========== CTA ========== */
        .cta-block {
            background: var(--color-primary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-xl);
            padding: var(--spacing-3xl) var(--spacing-2xl);
            text-align: center;
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30,58,74,0.85) 0%, rgba(30,58,74,0.6) 100%);
            border-radius: var(--radius-xl);
            z-index: 1;
        }
        .cta-block__content {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: var(--spacing-lg);
        }
        .cta-block__title {
            font-size: 1.8rem;
            font-weight: 800;
            color: #ffffff;
        }
        .cta-block__desc {
            color: rgba(255,255,255,0.8);
            max-width: 500px;
            font-size: 1rem;
        }

        /* ========== FOOTER ========== */
        .footer {
            background: var(--color-primary);
            color: rgba(255,255,255,0.75);
            padding: var(--spacing-3xl) 0 var(--spacing-xl);
            margin-top: auto;
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: var(--spacing-2xl);
            padding-bottom: var(--spacing-2xl);
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .footer__brand {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .footer__brand-name {
            font-size: 1.2rem;
            font-weight: 700;
            color: #ffffff;
        }
        .footer__brand-desc {
            font-size: 0.88rem;
            line-height: 1.6;
            max-width: 300px;
        }
        .footer__col-title {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: #ffffff;
            margin-bottom: var(--spacing-md);
        }
        .footer__links {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .footer__links a {
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .footer__links a:hover {
            color: #ffffff;
        }
        .footer__bottom {
            text-align: center;
            padding-top: var(--spacing-xl);
            font-size: 0.8rem;
            color: rgba(255,255,255,0.5);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .hero__content {
                grid-template-columns: 1fr;
                gap: var(--spacing-2xl);
            }
            .hero__title {
                font-size: 2.2rem;
            }
            .hero__stats-card {
                grid-template-columns: 1fr 1fr;
                max-width: 400px;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .kpi-strip {
                grid-template-columns: repeat(2, 1fr);
            }
            .cms-list {
                grid-template-columns: 1fr 1fr;
            }
            .category-entry-grid {
                grid-template-columns: 1fr;
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
            }
            .section__title {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 768px) {
            .top-bar__info {
                font-size: 0.72rem;
                gap: var(--spacing-sm);
            }
            .nav {
                display: none;
            }
            .nav__toggle {
                display: flex;
            }
            .mobile-nav {
                display: flex;
            }
            .hero {
                padding: var(--spacing-2xl) 0;
            }
            .hero__title {
                font-size: 1.7rem;
            }
            .hero__desc {
                font-size: 0.95rem;
            }
            .hero__stats-card {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
                padding: var(--spacing-lg);
            }
            .hero__stat-value {
                font-size: 1.6rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .kpi-strip {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
            .kpi-card__value {
                font-size: 2rem;
            }
            .cms-list {
                grid-template-columns: 1fr;
            }
            .section {
                padding: var(--spacing-2xl) 0;
            }
            .section__title {
                font-size: 1.4rem;
            }
            .footer__grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-xl);
            }
            .btn {
                padding: 11px 22px;
                font-size: 0.9rem;
            }
            .cta-block {
                padding: var(--spacing-2xl) var(--spacing-lg);
                border-radius: var(--radius-lg);
            }
            .cta-block__title {
                font-size: 1.4rem;
            }
            .header__inner {
                height: 54px;
            }
            .header__logo {
                font-size: 1.05rem;
            }
        }

        @media (max-width: 520px) {
            .top-bar {
                display: none;
            }
            .container {
                padding: 0 var(--spacing-md);
            }
            .hero {
                padding: var(--spacing-xl) 0;
            }
            .hero__title {
                font-size: 1.4rem;
            }
            .hero__desc {
                font-size: 0.88rem;
            }
            .hero__stats-card {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
                padding: var(--spacing-md);
            }
            .hero__stat-value {
                font-size: 1.3rem;
            }
            .hero__stat-label {
                font-size: 0.7rem;
            }
            .hero__actions {
                flex-direction: column;
                gap: var(--spacing-sm);
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .kpi-strip {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
            }
            .kpi-card {
                padding: var(--spacing-md);
            }
            .kpi-card__value {
                font-size: 1.6rem;
            }
            .section__title {
                font-size: 1.2rem;
            }
            .features-grid {
                gap: var(--spacing-md);
            }
            .faq-item__question {
                font-size: 0.9rem;
                padding: var(--spacing-md);
            }
            .category-entry__title {
                font-size: 1.3rem;
            }
            .cta-block__title {
                font-size: 1.2rem;
            }
            .header__inner {
                height: 48px;
                padding: 0 var(--spacing-md);
            }
            .header__logo {
                font-size: 0.95rem;
            }
            .header__logo-icon {
                width: 28px;
                height: 28px;
                font-size: 0.85rem;
            }
        }

/* roulang page: article */
:root {
            --color-primary: #1a5c63;
            --color-primary-hover: #154a50;
            --color-secondary: #0d9488;
            --color-accent: #f0a04b;
            --color-bg: #f5f6f8;
            --color-surface: #ffffff;
            --color-text: #1a1a2e;
            --color-text-soft: #5a6170;
            --color-text-muted: #8b919e;
            --color-border: #e2e5ea;
            --color-border-light: #eef0f4;
            --color-topbar: #143d42;
            --color-success: #059669;
            --color-warning: #d97706;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
            --shadow-lg: 0 8px 28px rgba(0,0,0,0.09), 0 4px 8px rgba(0,0,0,0.05);
            --shadow-xl: 0 16px 40px rgba(0,0,0,0.11), 0 6px 12px rgba(0,0,0,0.06);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
            --transition-fast: 0.15s ease;
            --transition-normal: 0.25s ease;
            --transition-slow: 0.35s ease;
            --max-width: 1240px;
            --max-width-article: 780px;
            --header-height: 64px;
            --topbar-height: 38px;
        }
        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
        body{
            font-family:var(--font-sans);
            font-size:16px;
            line-height:1.7;
            color:var(--color-text);
            background:var(--color-bg);
            min-height:100vh;
            -webkit-font-smoothing:antialiased;
            -moz-osx-font-smoothing:grayscale;
        }
        a{text-decoration:none;color:inherit;transition:color var(--transition-fast)}
        img{max-width:100%;height:auto;display:block}
        button{cursor:pointer;border:none;background:none;font-family:inherit;font-size:inherit}
        input,textarea{font-family:inherit;font-size:inherit}
        ul,ol{list-style:none}
        h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:var(--color-text)}
        .container{max-width:var(--max-width);margin:0 auto;padding:0 24px}
        .container--article{max-width:var(--max-width-article);margin:0 auto;padding:0 24px}
        /* Top Bar */
        .topbar{
            background:var(--color-topbar);
            color:rgba(255,255,255,0.9);
            font-size:13px;
            height:var(--topbar-height);
            line-height:var(--topbar-height);
            position:sticky;
            top:0;
            z-index:1001;
        }
        .topbar__inner{display:flex;justify-content:space-between;align-items:center;height:100%}
        .topbar__left{display:flex;align-items:center;gap:16px}
        .topbar__badge{
            display:inline-flex;align-items:center;gap:5px;
            background:rgba(255,255,255,0.12);padding:3px 10px;border-radius:20px;
            font-size:12px;line-height:1.6;
        }
        .topbar__badge-dot{width:7px;height:7px;border-radius:50%;background:#22c55e;animation:pulse-dot 2s infinite}
        @keyframes pulse-dot{0%,100%{opacity:1}50%{opacity:0.4}}
        .topbar__right{display:flex;align-items:center;gap:14px}
        .topbar__link{color:rgba(255,255,255,0.8);font-size:13px;transition:color var(--transition-fast)}
        .topbar__link:hover{color:#fff}
        .topbar__sep{width:1px;height:14px;background:rgba(255,255,255,0.2)}
        /* Header */
        .header{
            background:var(--color-surface);
            border-bottom:1px solid var(--color-border-light);
            position:sticky;
            top:var(--topbar-height);
            z-index:1000;
            height:var(--header-height);
            box-shadow:var(--shadow-sm);
        }
        .header__inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-height)}
        .header__logo{
            display:flex;align-items:center;gap:10px;
            font-size:20px;font-weight:700;color:var(--color-primary);
            letter-spacing:-0.3px;white-space:nowrap;
            transition:opacity var(--transition-fast);
        }
        .header__logo:hover{opacity:0.85}
        .header__logo-icon{
            display:inline-flex;align-items:center;justify-content:center;
            width:38px;height:38px;border-radius:var(--radius-md);
            background:linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color:#fff;font-size:18px;font-weight:700;
            box-shadow:0 2px 8px rgba(26,92,99,0.25);
        }
        .nav{display:flex;align-items:center;gap:6px}
        .nav__link{
            display:inline-flex;align-items:center;padding:8px 16px;
            border-radius:var(--radius-sm);font-size:15px;font-weight:500;
            color:var(--color-text-soft);transition:all var(--transition-fast);
            white-space:nowrap;
        }
        .nav__link:hover{color:var(--color-primary);background:rgba(26,92,99,0.04)}
        .nav__link--active{color:var(--color-primary);background:rgba(26,92,99,0.07);font-weight:600}
        .nav__cta{
            display:inline-flex;align-items:center;padding:9px 20px;
            border-radius:var(--radius-sm);font-size:14px;font-weight:600;
            background:var(--color-primary);color:#fff;
            transition:all var(--transition-fast);white-space:nowrap;
            box-shadow:0 2px 6px rgba(26,92,99,0.2);
        }
        .nav__cta:hover{background:var(--color-primary-hover);box-shadow:0 4px 12px rgba(26,92,99,0.3);transform:translateY(-1px);color:#fff}
        .nav__toggle{display:none;font-size:24px;color:var(--color-text);padding:8px;border-radius:var(--radius-sm);transition:background var(--transition-fast)}
        .nav__toggle:hover{background:var(--color-border-light)}
        /* Breadcrumb */
        .breadcrumb-wrap{padding:16px 0;background:var(--color-surface);border-bottom:1px solid var(--color-border-light)}
        .breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:6px;font-size:14px;color:var(--color-text-muted)}
        .breadcrumb a{color:var(--color-text-soft);transition:color var(--transition-fast)}
        .breadcrumb a:hover{color:var(--color-primary)}
        .breadcrumb__sep{color:var(--color-border);font-size:12px;user-select:none}
        .breadcrumb__current{color:var(--color-text);font-weight:500}
        /* Article Header */
        .article-header{padding:40px 0 24px;background:var(--color-surface)}
        .article-header__meta{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:16px}
        .article-header__category{
            display:inline-flex;align-items:center;padding:5px 14px;
            border-radius:20px;font-size:13px;font-weight:600;
            background:rgba(13,148,136,0.08);color:var(--color-secondary);
            letter-spacing:0.3px;transition:all var(--transition-fast);
        }
        .article-header__category:hover{background:rgba(13,148,136,0.16);color:#0b7d73}
        .article-header__date{font-size:14px;color:var(--color-text-muted);display:flex;align-items:center;gap:5px}
        .article-header__date::before{content:'';display:inline-block;width:4px;height:4px;border-radius:50%;background:var(--color-border)}
        .article-header__title{font-size:32px;font-weight:800;line-height:1.35;color:var(--color-text);letter-spacing:-0.4px;margin-bottom:12px}
        .article-header__desc{font-size:17px;color:var(--color-text-soft);line-height:1.65}
        /* Article Cover */
        .article-cover{padding:0 0 8px;background:var(--color-surface)}
        .article-cover img{width:100%;max-height:420px;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}
        /* Article Body */
        .article-body-wrap{background:var(--color-bg);padding:32px 0 48px}
        .article-body{
            background:var(--color-surface);
            border-radius:var(--radius-lg);
            padding:40px 44px;
            box-shadow:var(--shadow-sm);
            border:1px solid var(--color-border-light);
        }
        .article-body h2{font-size:24px;margin:32px 0 14px;padding-top:8px;color:var(--color-text)}
        .article-body h3{font-size:20px;margin:24px 0 10px;color:var(--color-text)}
        .article-body h2:first-child,.article-body h3:first-child{margin-top:0}
        .article-body p{margin-bottom:16px;font-size:16px;line-height:1.85;color:var(--color-text-soft)}
        .article-body ul,.article-body ol{margin:12px 0 20px 20px}
        .article-body li{margin-bottom:8px;line-height:1.75;color:var(--color-text-soft);list-style:disc}
        .article-body ol li{list-style:decimal}
        .article-body strong{color:var(--color-text);font-weight:600}
        .article-body a{color:var(--color-secondary);font-weight:500;border-bottom:1px solid rgba(13,148,136,0.3);transition:all var(--transition-fast)}
        .article-body a:hover{color:var(--color-primary);border-bottom-color:var(--color-primary)}
        .article-body blockquote{
            margin:20px 0;padding:16px 22px;
            border-left:4px solid var(--color-secondary);
            background:rgba(13,148,136,0.03);
            border-radius:0 var(--radius-sm) var(--radius-sm) 0;
            color:var(--color-text-soft);font-style:italic;
        }
        .article-body img{border-radius:var(--radius-md);margin:16px 0;box-shadow:var(--shadow-sm)}
        .article-body code{
            background:rgba(26,92,99,0.06);padding:2px 7px;
            border-radius:4px;font-family:var(--font-mono);font-size:14px;
            color:var(--color-primary);
        }
        .article-body pre{
            background:#1a1a2e;color:#e2e8f0;padding:20px 24px;
            border-radius:var(--radius-md);overflow-x:auto;
            margin:16px 0;font-size:14px;line-height:1.65;
        }
        .article-body pre code{background:none;padding:0;color:inherit;font-size:inherit}
        /* Article Footer Meta */
        .article-footer-meta{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:36px;padding-top:24px;border-top:1px solid var(--color-border-light)}
        .article-footer-meta__tags{display:flex;flex-wrap:wrap;gap:8px}
        .article-footer-meta__tag{
            display:inline-flex;padding:5px 12px;border-radius:16px;
            font-size:13px;color:var(--color-text-soft);background:var(--color-bg);
            border:1px solid var(--color-border);transition:all var(--transition-fast);
        }
        .article-footer-meta__tag:hover{background:var(--color-border-light);color:var(--color-text)}
        /* Related Section */
        .related-section{padding:48px 0 56px;background:var(--color-bg)}
        .related-section__title{font-size:22px;font-weight:700;margin-bottom:28px;color:var(--color-text);position:relative;display:inline-block}
        .related-section__title::after{content:'';display:block;width:40px;height:3px;background:var(--color-secondary);border-radius:3px;margin-top:6px}
        .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
        .related-card{
            background:var(--color-surface);border-radius:var(--radius-lg);
            overflow:hidden;box-shadow:var(--shadow-sm);
            border:1px solid var(--color-border-light);
            transition:all var(--transition-normal);
            display:flex;flex-direction:column;
        }
        .related-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);border-color:var(--color-border)}
        .related-card__img{width:100%;height:180px;object-fit:cover}
        .related-card__body{padding:18px 20px 20px;flex:1;display:flex;flex-direction:column}
        .related-card__cat{font-size:12px;font-weight:600;color:var(--color-secondary);margin-bottom:6px;letter-spacing:0.3px}
        .related-card__title{font-size:16px;font-weight:700;color:var(--color-text);line-height:1.4;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .related-card__desc{font-size:14px;color:var(--color-text-muted);line-height:1.55;flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:14px}
        .related-card__link{display:inline-flex;align-items:center;gap:5px;font-size:14px;font-weight:600;color:var(--color-primary);transition:gap var(--transition-fast);margin-top:auto}
        .related-card__link:hover{gap:9px;color:var(--color-primary-hover)}
        .related-card__link-arrow{font-size:16px;transition:transform var(--transition-fast)}
        .related-card__link:hover .related-card__link-arrow{transform:translateX(3px)}
        /* CTA Section */
        .cta-section{padding:52px 0;background:linear-gradient(160deg, #f0f7f8 0%, #e8f4f5 40%, #f5f6f8 100%);text-align:center}
        .cta-section__inner{max-width:620px;margin:0 auto}
        .cta-section__icon{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:50%;background:rgba(26,92,99,0.1);margin-bottom:20px;font-size:28px}
        .cta-section__title{font-size:24px;font-weight:700;color:var(--color-text);margin-bottom:10px}
        .cta-section__desc{font-size:16px;color:var(--color-text-soft);line-height:1.65;margin-bottom:26px}
        .btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;transition:all var(--transition-normal);letter-spacing:0.2px}
        .btn--primary{background:var(--color-primary);color:#fff;box-shadow:0 4px 14px rgba(26,92,99,0.25)}
        .btn--primary:hover{background:var(--color-primary-hover);box-shadow:0 6px 20px rgba(26,92,99,0.35);transform:translateY(-2px);color:#fff}
        .btn--outline{background:transparent;color:var(--color-primary);border:2px solid var(--color-primary)}
        .btn--outline:hover{background:var(--color-primary);color:#fff}
        .btn--lg{padding:15px 34px;font-size:16px;border-radius:var(--radius-md)}
        /* Not Found */
        .not-found{padding:60px 0;text-align:center;background:var(--color-surface)}
        .not-found__icon{font-size:64px;margin-bottom:16px;opacity:0.7}
        .not-found__title{font-size:24px;font-weight:700;color:var(--color-text);margin-bottom:8px}
        .not-found__desc{font-size:16px;color:var(--color-text-soft);margin-bottom:24px}
        /* Footer */
        .footer{background:#1a1f2b;color:rgba(255,255,255,0.75);padding:48px 0 24px;margin-top:0}
        .footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;margin-bottom:32px}
        .footer__brand-name{font-size:20px;font-weight:700;color:#fff;margin-bottom:10px}
        .footer__brand-desc{font-size:14px;line-height:1.7;color:rgba(255,255,255,0.55);max-width:280px}
        .footer__col-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px}
        .footer__links{display:flex;flex-direction:column;gap:8px}
        .footer__links a{color:rgba(255,255,255,0.6);font-size:14px;transition:color var(--transition-fast)}
        .footer__links a:hover{color:#fff}
        .footer__bottom{padding-top:20px;border-top:1px solid rgba(255,255,255,0.1);text-align:center;font-size:13px;color:rgba(255,255,255,0.4)}
        /* Mobile Nav Overlay */
        .nav__overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.45);z-index:999}
        .nav__overlay--active{display:block}
        /* Responsive */
        @media (max-width:1024px){
            .related-grid{grid-template-columns:repeat(2,1fr)}
            .article-body{padding:32px 28px}
            .article-header__title{font-size:26px}
        }
        @media (max-width:768px){
            :root{--header-height:56px;--topbar-height:34px}
            .topbar{font-size:12px}
            .topbar__badge{display:none}
            .topbar__left{font-size:12px}
            .topbar__right{gap:8px}
            .topbar__link{font-size:12px}
            .header__inner{height:56px}
            .header__logo{font-size:17px}
            .header__logo-icon{width:32px;height:32px;font-size:15px}
            .nav{position:fixed;top:calc(var(--topbar-height) + var(--header-height));left:0;right:0;background:var(--color-surface);flex-direction:column;padding:12px 20px 20px;gap:4px;border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-lg);transform:translateY(-110%);opacity:0;transition:all var(--transition-normal);z-index:998;pointer-events:none}
            .nav--open{transform:translateY(0);opacity:1;pointer-events:auto}
            .nav__link,.nav__cta{width:100%;justify-content:center;padding:12px 16px;font-size:15px;border-radius:var(--radius-sm)}
            .nav__cta{margin-top:6px}
            .nav__toggle{display:block}
            .nav__overlay--active{display:block}
            .related-grid{grid-template-columns:1fr;gap:14px}
            .related-card__img{height:160px}
            .article-body{padding:24px 18px;border-radius:var(--radius-md)}
            .article-header__title{font-size:22px}
            .article-header{padding:24px 0 16px}
            .article-body-wrap{padding:20px 0 32px}
            .cta-section{padding:36px 0}
            .cta-section__title{font-size:20px}
            .container{padding:0 16px}
            .container--article{padding:0 16px}
            .footer__grid{grid-template-columns:1fr;gap:24px}
        }
        @media (max-width:520px){
            .article-header__title{font-size:20px}
            .article-header__meta{gap:8px}
            .article-body{font-size:15px;padding:18px 14px}
            .article-body h2{font-size:20px}
            .article-body h3{font-size:17px}
            .article-cover img{max-height:220px;border-radius:var(--radius-md)}
            .related-section__title{font-size:18px}
            .btn--lg{padding:13px 22px;font-size:14px}
            .breadcrumb{font-size:13px}
        }

/* roulang page: category1 */
:root {
            --color-primary: #1b3b3a;
            --color-primary-light: #2a5c5a;
            --color-primary-lighter: #3d7a77;
            --color-accent: #c8963e;
            --color-accent-hover: #b88735;
            --color-accent-light: #f5e6d0;
            --color-bg: #f4f5f6;
            --color-bg-alt: #edf0f2;
            --color-surface: #ffffff;
            --color-text: #1a1a1a;
            --color-text-secondary: #4a4f55;
            --color-text-muted: #6b7280;
            --color-border: #dde1e5;
            --color-border-light: #e8ebee;
            --color-success: #10b981;
            --color-success-bg: #ecfdf5;
            --color-warning: #f59e0b;
            --color-warning-bg: #fffbeb;
            --color-info: #3b82f6;
            --color-info-bg: #eff6ff;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
            --shadow-lg: 0 10px 25px rgba(0,0,0,0.09), 0 4px 8px rgba(0,0,0,0.04);
            --shadow-xl: 0 16px 40px rgba(0,0,0,0.10), 0 6px 12px rgba(0,0,0,0.05);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", "Menlo", monospace;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --max-width: 1200px;
            --max-width-narrow: 960px;
            --header-height: 68px;
            --topbar-height: 34px;
        }

        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.65;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

        a {
            color: var(--color-primary-light);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--color-primary);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

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

        ul, ol {
            list-style: none;
        }

        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--color-text);
        }

        /* ========== Container ========== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .container--narrow {
            max-width: var(--max-width-narrow);
        }

        /* ========== Top Bar ========== */
        .topbar {
            background: var(--color-primary);
            color: rgba(255,255,255,0.85);
            font-size: 13px;
            height: var(--topbar-height);
            display: flex;
            align-items: center;
            z-index: 1001;
            position: relative;
        }

        .topbar__inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .topbar__msg {
            display: flex;
            align-items: center;
            gap: 7px;
        }

        .topbar__msg-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #4ade80;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.6); }
        }

        .topbar__actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .topbar__link {
            color: rgba(255,255,255,0.8);
            font-size: 12px;
            transition: color var(--transition-fast);
        }

        .topbar__link:hover {
            color: #ffffff;
        }

        /* ========== Header / Nav ========== */
        .header {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-xs);
        }

        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            gap: 24px;
        }

        .header__logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--color-primary);
            text-decoration: none;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .header__logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .header__logo:hover {
            color: var(--color-primary);
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav__link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-secondary);
            text-decoration: none;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav__link:hover {
            color: var(--color-primary);
            background: rgba(27,59,58,0.05);
        }

        .nav__link--active {
            color: var(--color-primary);
            background: rgba(27,59,58,0.08);
            font-weight: 600;
            pointer-events: none;
        }

        .nav__cta {
            display: inline-flex;
            align-items: center;
            padding: 9px 20px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--color-accent);
            text-decoration: none;
            transition: all var(--transition-fast);
            white-space: nowrap;
            margin-left: 6px;
            box-shadow: 0 2px 6px rgba(200,150,62,0.3);
        }

        .nav__cta:hover {
            background: var(--color-accent-hover);
            color: #fff;
            box-shadow: 0 4px 12px rgba(200,150,62,0.4);
            transform: translateY(-1px);
        }

        .nav__toggle {
            display: none;
            font-size: 24px;
            color: var(--color-text);
            padding: 8px;
            border-radius: var(--radius-sm);
            line-height: 1;
            transition: background var(--transition-fast);
        }

        .nav__toggle:hover {
            background: var(--color-bg-alt);
        }

        /* ========== Page Banner ========== */
        .page-banner {
            position: relative;
            background: linear-gradient(170deg, #1b3b3a 0%, #1f4542 40%, #1a3634 100%);
            color: #fff;
            padding: 64px 0 56px;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.18;
            mask-image: linear-gradient(to left, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0) 100%);
            -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0) 100%);
            pointer-events: none;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--color-accent);
            opacity: 0.7;
        }

        .page-banner__inner {
            position: relative;
            z-index: 1;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .page-banner__breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255,255,255,0.6);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .page-banner__breadcrumb a {
            color: rgba(255,255,255,0.75);
            font-size: 13px;
        }

        .page-banner__breadcrumb a:hover {
            color: #fff;
        }

        .page-banner__breadcrumb-sep {
            font-size: 11px;
            color: rgba(255,255,255,0.4);
        }

        .page-banner__title {
            font-size: 38px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .page-banner__subtitle {
            font-size: 17px;
            color: rgba(255,255,255,0.75);
            max-width: 620px;
            line-height: 1.6;
        }

        .page-banner__meta {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-top: 18px;
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            flex-wrap: wrap;
        }

        .page-banner__meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .page-banner__meta-num {
            font-weight: 700;
            font-size: 20px;
            color: var(--color-accent);
            font-family: var(--font-mono);
        }

        /* ========== Section ========== */
        .section {
            padding: 56px 0;
        }

        .section--alt {
            background: var(--color-surface);
        }

        .section--accent-bg {
            background: linear-gradient(180deg, #f9fafb 0%, #f4f5f6 100%);
        }

        .section__header {
            text-align: center;
            margin-bottom: 40px;
        }

        .section__header--left {
            text-align: left;
        }

        .section__label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--color-primary-lighter);
            background: rgba(27,59,58,0.06);
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
        }

        .section__title {
            font-size: 30px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .section__desc {
            font-size: 16px;
            color: var(--color-text-muted);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section__header--left .section__desc {
            margin: 0;
        }

        /* ========== Tutorial Grid ========== */
        .tutorial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .tutorial-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .tutorial-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }

        .tutorial-card__image-wrap {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--color-bg-alt);
        }

        .tutorial-card__image {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .tutorial-card:hover .tutorial-card__image {
            transform: scale(1.04);
        }

        .tutorial-card__badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--color-accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
            z-index: 2;
            letter-spacing: 0.03em;
        }

        .tutorial-card__body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .tutorial-card__tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }

        .tutorial-card__tag {
            font-size: 12px;
            color: var(--color-primary-lighter);
            background: rgba(27,59,58,0.06);
            padding: 3px 10px;
            border-radius: 12px;
            font-weight: 500;
        }

        .tutorial-card__title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .tutorial-card__excerpt {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.55;
            flex: 1;
            margin-bottom: 14px;
        }

        .tutorial-card__footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid var(--color-border-light);
            font-size: 13px;
            color: var(--color-text-muted);
        }

        .tutorial-card__read-more {
            font-weight: 600;
            font-size: 13px;
            color: var(--color-primary-light);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition-fast);
        }

        .tutorial-card__read-more:hover {
            color: var(--color-primary);
            gap: 7px;
        }

        .tutorial-card__read-more::after {
            content: '→';
            transition: transform var(--transition-fast);
        }

        .tutorial-card:hover .tutorial-card__read-more::after {
            transform: translateX(2px);
        }

        /* ========== Steps Flow ========== */
        .steps-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            border: 1px solid var(--color-border-light);
            position: relative;
            transition: all var(--transition-base);
        }

        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .step-card__num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-weight: 700;
            font-size: 20px;
            margin-bottom: 16px;
            font-family: var(--font-mono);
            box-shadow: 0 4px 10px rgba(27,59,58,0.25);
        }

        .step-card__icon {
            font-size: 28px;
            margin-bottom: 10px;
            display: block;
        }

        .step-card__title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--color-text);
        }

        .step-card__desc {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        .step-card__arrow {
            display: none;
        }

        /* ========== Info Highlight Box ========== */
        .info-highlight {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--color-border-light);
            display: flex;
            align-items: flex-start;
            gap: 20px;
            box-shadow: var(--shadow-sm);
        }

        .info-highlight__icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: var(--color-info-bg);
            color: var(--color-info);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }

        .info-highlight__content h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .info-highlight__content p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

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

        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-sm);
        }

        .faq-item__question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            text-align: left;
            background: none;
            border: none;
            cursor: pointer;
            gap: 12px;
            transition: background var(--transition-fast);
        }

        .faq-item__question:hover {
            background: var(--color-bg);
        }

        .faq-item__arrow {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: transform var(--transition-base);
            color: var(--color-text-muted);
        }

        .faq-item--open .faq-item__arrow {
            transform: rotate(180deg);
            background: var(--color-primary);
            color: #fff;
        }

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
        }

        .faq-item--open .faq-item__answer {
            max-height: 400px;
        }

        .faq-item__answer-inner {
            padding: 0 20px 20px;
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* ========== CTA Section ========== */
        .cta-section {
            background: linear-gradient(160deg, var(--color-primary) 0%, #1f4542 60%, #1a3634 100%);
            color: #fff;
            padding: 56px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(255,255,255,0.03);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255,255,255,0.025);
            pointer-events: none;
        }

        .cta-section__inner {
            position: relative;
            z-index: 1;
        }

        .cta-section__title {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .cta-section__desc {
            font-size: 16px;
            color: rgba(255,255,255,0.7);
            margin-bottom: 28px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            font-size: 16px;
            font-weight: 700;
            border-radius: var(--radius-md);
            background: var(--color-accent);
            color: #fff;
            text-decoration: none;
            transition: all var(--transition-base);
            box-shadow: 0 6px 20px rgba(200,150,62,0.45);
        }

        .btn-cta-large:hover {
            background: var(--color-accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(200,150,62,0.55);
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-md);
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.35);
            text-decoration: none;
            transition: all var(--transition-base);
            margin-left: 12px;
        }

        .btn-outline-light:hover {
            border-color: #fff;
            background: rgba(255,255,255,0.08);
            color: #fff;
        }

        /* ========== Footer ========== */
        .footer {
            background: #161e1d;
            color: rgba(255,255,255,0.7);
            padding: 48px 0 28px;
            margin-top: auto;
        }

        .footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer__brand-name {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .footer__brand-desc {
            font-size: 14px;
            line-height: 1.6;
            color: rgba(255,255,255,0.5);
            max-width: 340px;
        }

        .footer__col-title {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }

        .footer__links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer__links a {
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .footer__links a:hover {
            color: #fff;
        }

        .footer__bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.35);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .tutorial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-flow {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .footer__brand {
                grid-column: 1 / -1;
            }
            .page-banner__title {
                font-size: 30px;
            }
            .section__title {
                font-size: 26px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
            }
            .topbar {
                display: none;
            }
            .header__inner {
                height: var(--header-height);
                padding: 0 16px;
            }
            .header__logo {
                font-size: 17px;
            }
            .header__logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--color-surface);
                flex-direction: column;
                padding: 12px 16px;
                gap: 4px;
                border-bottom: 1px solid var(--color-border-light);
                box-shadow: var(--shadow-lg);
                transform: translateY(-110%);
                opacity: 0;
                transition: all var(--transition-base);
                z-index: 999;
                pointer-events: none;
            }
            .nav--open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav__link {
                width: 100%;
                padding: 13px 16px;
                font-size: 15px;
                border-radius: var(--radius-sm);
            }
            .nav__cta {
                width: 100%;
                text-align: center;
                justify-content: center;
                margin-left: 0;
                margin-top: 6px;
                padding: 13px 16px;
                font-size: 15px;
                border-radius: var(--radius-sm);
            }
            .nav__toggle {
                display: block;
            }
            .tutorial-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .steps-flow {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .step-card {
                padding: 20px 15px;
            }
            .step-card__num {
                width: 38px;
                height: 38px;
                font-size: 17px;
            }
            .page-banner {
                padding: 40px 0 36px;
            }
            .page-banner__title {
                font-size: 26px;
            }
            .page-banner__subtitle {
                font-size: 15px;
            }
            .page-banner::before {
                width: 100%;
                opacity: 0.1;
            }
            .section {
                padding: 40px 0;
            }
            .section__title {
                font-size: 23px;
            }
            .cta-section {
                padding: 40px 0;
            }
            .cta-section__title {
                font-size: 24px;
            }
            .btn-outline-light {
                margin-left: 0;
                margin-top: 10px;
            }
            .info-highlight {
                flex-direction: column;
                gap: 14px;
                padding: 22px 18px;
            }
            .footer__grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer {
                padding: 36px 0 22px;
            }
            .faq-item__question {
                font-size: 14px;
                padding: 15px 16px;
            }
            .faq-item__answer-inner {
                padding: 0 16px 16px;
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .steps-flow {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .page-banner__title {
                font-size: 22px;
            }
            .page-banner__meta {
                gap: 12px;
                font-size: 12px;
            }
            .page-banner__meta-num {
                font-size: 17px;
            }
            .section__title {
                font-size: 20px;
            }
            .cta-section__title {
                font-size: 21px;
            }
            .btn-cta-large {
                padding: 12px 24px;
                font-size: 15px;
            }
            .btn-outline-light {
                padding: 11px 22px;
                font-size: 14px;
            }
            .container {
                padding: 0 14px;
            }
            .tutorial-card__body {
                padding: 15px;
            }
        }

        /* ========== Utility ========== */
        .text-center { text-align: center; }
        .mt-0 { margin-top: 0; }
        .mt-2 { margin-top: 8px; }
        .mt-3 { margin-top: 12px; }
        .mt-4 { margin-top: 16px; }
        .mb-2 { margin-bottom: 8px; }
        .mb-3 { margin-bottom: 12px; }
        .mb-4 { margin-bottom: 16px; }