/* roulang page: index */
:root {
            --color-accent: #c9a96e;
            --color-accent-hover: #b8945e;
            --color-deep: #1a1815;
            --color-soft: #f7f4ef;
            --color-muted: #8c8984;
            --color-border: #e8e3da;
            --color-card-bg: #ffffff;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-sm: 0 1px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 2px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.7;
            color: #1a1815;
            background-color: #fdfcf9;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        input {
            font-family: inherit;
            outline: none;
        }

        /* Sticky Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid transparent;
            transition: all var(--transition-smooth);
        }
        .site-header.scrolled {
            border-bottom-color: var(--color-border);
            box-shadow: var(--shadow-sm);
        }

        /* Nav links */
        .nav-link {
            position: relative;
            font-size: 0.9rem;
            font-weight: 500;
            letter-spacing: 0.02em;
            color: #3d3a35;
            padding: 0.35rem 0;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
            transition: width var(--transition-smooth);
        }
        .nav-link:hover {
            color: #1a1815;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: #1a1815;
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
            background: var(--color-accent);
        }

        /* CTA Button */
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.65rem 1.6rem;
            background: var(--color-deep);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            border-radius: 9999px;
            letter-spacing: 0.03em;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            box-shadow: 0 2px 12px rgba(26, 24, 21, 0.15);
        }
        .btn-cta:hover {
            background: #2d2a25;
            box-shadow: 0 6px 24px rgba(26, 24, 21, 0.28);
            transform: translateY(-2px);
        }
        .btn-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(26, 24, 21, 0.2);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            background: transparent;
            color: var(--color-deep);
            font-weight: 600;
            font-size: 0.9rem;
            border-radius: 9999px;
            border: 1.5px solid var(--color-border);
            letter-spacing: 0.03em;
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }
        .btn-outline:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            background: rgba(201, 169, 110, 0.04);
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.65rem 1.8rem;
            background: var(--color-accent);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            border-radius: 9999px;
            letter-spacing: 0.03em;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(201, 169, 110, 0.3);
        }
        .btn-accent:hover {
            background: var(--color-accent-hover);
            box-shadow: 0 8px 28px rgba(180, 140, 80, 0.4);
            transform: translateY(-2px);
        }
        .btn-accent:active {
            transform: translateY(0);
        }

        /* Hero */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: #1a1815;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.55;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(26, 24, 21, 0.5) 0%, rgba(26, 24, 21, 0.75) 60%, rgba(26, 24, 21, 0.9) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }

        /* Card */
        .card-elevated {
            background: #fff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-md);
            transition: all var(--transition-smooth);
            overflow: hidden;
            border: 1px solid transparent;
        }
        .card-elevated:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-border);
        }

        .card-soft {
            background: var(--color-soft);
            border-radius: var(--radius-lg);
            transition: all var(--transition-smooth);
            overflow: hidden;
            border: 1px solid transparent;
        }
        .card-soft:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        /* Badge */
        .badge-tag {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            border-radius: 9999px;
            background: rgba(201, 169, 110, 0.12);
            color: #8a6d3b;
            white-space: nowrap;
        }

        /* Section title */
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 0.5rem;
        }
        .section-title {
            font-family: "Noto Serif SC", "Playfair Display", Georgia, serif;
            font-size: 2.25rem;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: 0.02em;
            color: #1a1815;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: #6b6862;
            line-height: 1.7;
            max-width: 640px;
        }

        /* FAQ Accordion */
        .faq-item {
            border-bottom: 1px solid var(--color-border);
            padding: 1.25rem 0;
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        .faq-item:first-child {
            border-top: 1px solid var(--color-border);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1.05rem;
            color: #1a1815;
            gap: 1rem;
            user-select: none;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-smooth);
            font-size: 0.75rem;
            color: var(--color-accent);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--color-accent);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            color: #5c5853;
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-top: 0.75rem;
        }

        /* Data card */
        .data-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 1.5rem 1.75rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            transition: all var(--transition-smooth);
        }
        .data-card:hover {
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }

        /* Footer */
        .site-footer {
            background: #1a1815;
            color: #b8b5ae;
        }
        .footer-link {
            color: #b8b5ae;
            transition: color var(--transition-fast);
            font-size: 0.9rem;
        }
        .footer-link:hover {
            color: #fff;
        }

        /* Mobile menu */
        .mobile-menu {
            position: fixed;
            top: 0;
            right: -100%;
            width: 300px;
            max-width: 85vw;
            height: 100vh;
            background: #fff;
            z-index: 2000;
            padding: 5rem 1.5rem 2rem;
            transition: right var(--transition-smooth);
            box-shadow: -4px 0 30px rgba(0, 0, 0, 0.15);
            overflow-y: auto;
        }
        .mobile-menu.open {
            right: 0;
        }
        .mobile-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1999;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }
        .mobile-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }

        /* Skeleton pulse for visual rhythm */
        @keyframes subtleShimmer {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.85;
            }
        }
        .shimmer {
            animation: subtleShimmer 4s ease-in-out infinite;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .section-title {
                font-size: 1.8rem;
            }
            .hero-section {
                min-height: 70vh;
            }
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.5rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }
            .hero-section {
                min-height: 60vh;
            }
            .card-elevated:hover,
            .card-soft:hover {
                transform: none;
            }
        }
        @media (max-width: 520px) {
            .section-title {
                font-size: 1.35rem;
            }
            .hero-section {
                min-height: 55vh;
            }
            .btn-cta,
            .btn-accent,
            .btn-outline {
                font-size: 0.8rem;
                padding: 0.55rem 1.2rem;
            }
        }

/* roulang page: category2 */
:root {
            --color-dark: #1a1815;
            --color-neutral: #3d3a35;
            --color-warm: #5c5853;
            --color-gold: #c9a96e;
            --color-gold-light: #d4ba82;
            --color-cream: #f7f4ef;
            --color-sand: #ede7db;
            --color-soft: #faf8f5;
            --color-white: #ffffff;
            --color-muted: #8c8984;
            --color-border: #e5e2dc;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 0.875rem;
            --radius-xl: 1.25rem;
            --radius-full: 9999px;
            --shadow-sm: 0 1px 2px rgba(26, 24, 21, 0.04);
            --shadow-md: 0 4px 16px rgba(26, 24, 21, 0.06);
            --shadow-lg: 0 8px 32px rgba(26, 24, 21, 0.08);
            --shadow-xl: 0 16px 48px rgba(26, 24, 21, 0.1);
            --transition-fast: 0.18s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--color-neutral);
            background-color: var(--color-soft);
            min-height: 100vh;
            -webkit-tap-highlight-color: transparent;
        }

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

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

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

        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--color-gold);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(229, 226, 220, 0.7);
            transition: box-shadow var(--transition-smooth);
        }

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

        .nav-link {
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--color-warm);
            padding: 0.35rem 0;
            position: relative;
            transition: color var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-gold);
            border-radius: 2px;
            transition: width var(--transition-smooth);
        }

        .nav-link:hover {
            color: var(--color-dark);
        }

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--color-dark);
            font-weight: 600;
        }

        .nav-link.active::after {
            width: 100%;
            background: var(--color-gold);
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            background: var(--color-dark);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            border-radius: var(--radius-full);
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }

        .btn-cta:hover {
            background: var(--color-neutral);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .btn-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.55rem 1.4rem;
            background: transparent;
            color: var(--color-dark);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            border-radius: var(--radius-full);
            border: 1.5px solid var(--color-border);
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }

        .btn-outline:hover {
            border-color: var(--color-gold);
            color: var(--color-gold);
            box-shadow: var(--shadow-sm);
        }

        .btn-gold {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.6rem;
            background: var(--color-gold);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            border-radius: var(--radius-full);
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }

        .btn-gold:hover {
            background: var(--color-gold-light);
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }

        .btn-gold:active {
            transform: translateY(0);
        }

        .card-craft {
            background: #fff;
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-sm);
        }

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

        .card-craft .card-image-wrap {
            overflow: hidden;
            position: relative;
            aspect-ratio: 16 / 11;
        }

        .card-craft .card-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .card-craft:hover .card-image-wrap img {
            transform: scale(1.06);
        }

        .card-craft .card-badge {
            position: absolute;
            top: 1rem;
            left: 1rem;
            background: rgba(26, 24, 21, 0.75);
            backdrop-filter: blur(8px);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            padding: 0.3rem 0.8rem;
            border-radius: var(--radius-full);
            z-index: 2;
        }

        .stat-block {
            text-align: center;
            padding: 1.5rem;
        }

        .stat-number {
            font-family: 'Noto Serif SC', 'Playfair Display', Georgia, serif;
            font-size: 2.6rem;
            font-weight: 700;
            color: var(--color-dark);
            line-height: 1.1;
            letter-spacing: -0.01em;
        }

        .stat-label {
            font-size: 0.8rem;
            color: var(--color-warm);
            margin-top: 0.35rem;
            font-weight: 500;
            letter-spacing: 0.03em;
        }

        .timeline-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--color-gold);
            flex-shrink: 0;
            position: relative;
            z-index: 1;
            box-shadow: 0 0 0 4px rgba(201, 169, 110, 0.15);
        }

        .timeline-line {
            position: absolute;
            left: 5px;
            top: 18px;
            bottom: 0;
            width: 2px;
            background: var(--color-sand);
            z-index: 0;
        }

        .faq-item {
            border-bottom: 1px solid var(--color-border);
            transition: all var(--transition-fast);
        }

        .faq-item summary {
            cursor: pointer;
            padding: 1.2rem 0;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--color-dark);
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            transition: color var(--transition-fast);
            letter-spacing: 0.01em;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            color: var(--color-gold);
        }

        .faq-item summary .faq-icon {
            font-size: 0.75rem;
            color: var(--color-gold);
            transition: transform var(--transition-smooth);
            flex-shrink: 0;
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            padding: 0 0 1.2rem 0;
            color: var(--color-warm);
            font-size: 0.875rem;
            line-height: 1.75;
            letter-spacing: 0.01em;
        }

        .footer-link {
            color: #b8b5ae;
            font-size: 0.8rem;
            transition: color var(--transition-fast);
            font-weight: 400;
            letter-spacing: 0.01em;
        }

        .footer-link:hover {
            color: var(--color-gold-light);
        }

        .mobile-menu-overlay {
            position: fixed;
            inset: 0;
            background: rgba(26, 24, 21, 0.7);
            z-index: 200;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
        }

        .mobile-menu-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-menu-panel {
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            max-width: 85vw;
            height: 100vh;
            background: #fff;
            z-index: 201;
            transition: right var(--transition-smooth);
            box-shadow: var(--shadow-xl);
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            overflow-y: auto;
        }

        .mobile-menu-panel.open {
            right: 0;
        }

        .mobile-nav-link {
            display: block;
            padding: 0.75rem 1rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-warm);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }

        .mobile-nav-link:hover {
            background: var(--color-cream);
            color: var(--color-dark);
        }

        .mobile-nav-link.active {
            background: var(--color-cream);
            color: var(--color-dark);
            font-weight: 600;
        }

        @media (max-width: 1024px) {
            .stat-number {
                font-size: 2.2rem;
            }
            .card-craft .card-image-wrap {
                aspect-ratio: 16 / 10;
            }
        }

        @media (max-width: 768px) {
            .stat-number {
                font-size: 1.8rem;
            }
            .card-craft .card-image-wrap {
                aspect-ratio: 4 / 3;
            }
            .page-banner {
                min-height: 280px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .timeline-line {
                left: 4px;
            }
            .timeline-dot {
                width: 10px;
                height: 10px;
            }
        }

        @media (max-width: 520px) {
            .page-banner {
                min-height: 240px;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .stat-block {
                padding: 1rem 0.5rem;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .card-craft .card-image-wrap {
                aspect-ratio: 3 / 2;
            }
        }

/* roulang page: category3 */
:root {
            --color-primary: #1a1815;
            --color-accent: #c9a96e;
            --color-accent-deep: #b8944f;
            --color-accent-light: rgba(201, 169, 110, 0.12);
            --color-accent-glow: rgba(201, 169, 110, 0.22);
            --color-bg: #fafaf8;
            --color-bg-warm: #f7f4ef;
            --color-surface: #ffffff;
            --color-text: #2c2824;
            --color-text-soft: #5c5853;
            --color-text-muted: #8c8984;
            --color-border: #e6e2da;
            --color-border-light: #f0ece5;
            --color-footer: #1c1a16;
            --color-footer-text: #b8b5ae;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --radius-full: 9999px;
            --shadow-xs: 0 1px 2px rgba(26, 24, 21, 0.04);
            --shadow-sm: 0 2px 8px rgba(26, 24, 21, 0.06);
            --shadow-md: 0 6px 20px rgba(26, 24, 21, 0.09);
            --shadow-lg: 0 14px 36px rgba(26, 24, 21, 0.11);
            --shadow-xl: 0 22px 50px rgba(26, 24, 21, 0.14);
            --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

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

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

        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        input {
            font-family: inherit;
        }
        ul {
            list-style: none;
        }

        /* ========== HEADER & NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border-light);
            transition: box-shadow var(--transition-smooth);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .nav-link {
            position: relative;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--color-text-soft);
            letter-spacing: 0.02em;
            padding: 0.35rem 0;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
            transition: width var(--transition-smooth);
        }
        .nav-link:hover {
            color: var(--color-primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--color-primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
            background: var(--color-accent-deep);
            height: 2.5px;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            background: var(--color-primary);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            letter-spacing: 0.03em;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            box-shadow: 0 2px 8px rgba(26, 24, 21, 0.15);
        }
        .btn-cta:hover {
            background: #2d2a25;
            box-shadow: 0 6px 18px rgba(26, 24, 21, 0.22);
            transform: translateY(-1px);
        }
        .btn-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(26, 24, 21, 0.12);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.55rem 1.4rem;
            background: transparent;
            color: var(--color-primary);
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            letter-spacing: 0.03em;
            border: 1.5px solid var(--color-border);
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }
        .btn-outline:hover {
            border-color: var(--color-accent);
            color: var(--color-accent-deep);
            background: var(--color-accent-light);
        }
        .btn-outline:active {
            transform: scale(0.97);
        }

        /* Mobile menu */
        .mobile-menu-overlay {
            position: fixed;
            inset: 0;
            background: rgba(26, 24, 21, 0.55);
            z-index: 45;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }
        .mobile-menu-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu-panel {
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            max-width: 85vw;
            height: 100vh;
            background: var(--color-surface);
            z-index: 46;
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 1rem;
            transition: right var(--transition-smooth);
            box-shadow: var(--shadow-xl);
            overflow-y: auto;
        }
        .mobile-menu-panel.open {
            right: 0;
        }
        .mobile-nav-link {
            display: block;
            padding: 0.75rem 1rem;
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-text);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
        }
        .mobile-nav-link:hover {
            background: var(--color-bg-warm);
            color: var(--color-accent-deep);
        }
        .mobile-nav-link.active {
            background: var(--color-accent-light);
            color: var(--color-accent-deep);
            font-weight: 600;
        }
        .mobile-close-btn {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--color-bg-warm);
            color: var(--color-primary);
            font-size: 1.1rem;
            transition: all var(--transition-fast);
            align-self: flex-end;
        }
        .mobile-close-btn:hover {
            background: #e8e3d8;
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center 35%;
            background-repeat: no-repeat;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(26, 24, 21, 0.5) 0%, rgba(26, 24, 21, 0.72) 60%, rgba(26, 24, 21, 0.85) 100%);
            z-index: 1;
        }
        .page-banner-content {
            position: relative;
            z-index: 2;
        }
        .badge-accent {
            display: inline-block;
            padding: 0.3rem 0.9rem;
            background: var(--color-accent-light);
            color: var(--color-accent-deep);
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            border: 1px solid rgba(201, 169, 110, 0.25);
        }
        .badge-trend {
            display: inline-block;
            padding: 0.25rem 0.7rem;
            background: #fff;
            color: var(--color-accent-deep);
            font-size: 0.7rem;
            font-weight: 700;
            border-radius: var(--radius-full);
            letter-spacing: 0.05em;
            text-transform: uppercase;
            border: 1px solid var(--color-accent);
        }

        /* ========== CARDS ========== */
        .trend-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-xs);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .trend-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-border);
        }
        .trend-card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--color-bg-warm);
        }
        .trend-card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .trend-card:hover .trend-card-img-wrap img {
            transform: scale(1.06);
        }
        .trend-card-body {
            padding: 1.25rem 1.4rem 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .trend-card-meta {
            font-size: 0.75rem;
            color: var(--color-text-muted);
            letter-spacing: 0.03em;
        }

        .featured-trend-card {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            background: var(--color-surface);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-smooth);
            display: grid;
            grid-template-columns: 1fr 1fr;
            min-height: 340px;
        }
        .featured-trend-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .featured-trend-img {
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 280px;
        }
        .featured-trend-content {
            padding: 2rem 2rem 2rem 2.2rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        /* ========== LIST STYLES ========== */
        .trend-list-item {
            display: flex;
            align-items: flex-start;
            gap: 1.2rem;
            padding: 1.1rem 1.3rem;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            border: 1px solid transparent;
            cursor: pointer;
        }
        .trend-list-item:hover {
            background: var(--color-bg-warm);
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-xs);
        }
        .trend-list-number {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--color-accent-light);
            color: var(--color-accent-deep);
            font-weight: 700;
            font-size: 0.9rem;
            border-radius: 50%;
            font-family: 'Playfair Display', 'Noto Serif SC', serif;
        }

        /* ========== SECTION STYLES ========== */
        .section-title {
            font-family: 'Noto Serif SC', 'Playfair Display', Georgia, serif;
            font-weight: 700;
            letter-spacing: 0.01em;
            line-height: 1.25;
        }
        .section-subtitle {
            color: var(--color-text-soft);
            line-height: 1.6;
            max-width: 620px;
        }
        .divider-accent {
            width: 48px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 3px;
        }
        .divider-accent-sm {
            width: 28px;
            height: 2.5px;
            background: var(--color-accent);
            border-radius: 2px;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--color-primary);
            border-radius: var(--radius-xl);
            overflow: hidden;
            position: relative;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(201, 169, 110, 0.18) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .btn-light {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.65rem 1.6rem;
            background: #fff;
            color: var(--color-primary);
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            letter-spacing: 0.03em;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
        }
        .btn-light:hover {
            background: #f0ece5;
            box-shadow: 0 8px 22px rgba(0, 0, 0, 0.16);
            transform: translateY(-2px);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--color-footer);
            color: var(--color-footer-text);
        }
        .footer-link {
            color: var(--color-footer-text);
            font-size: 0.875rem;
            transition: color var(--transition-fast);
        }
        .footer-link:hover {
            color: #fff;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .featured-trend-card {
                grid-template-columns: 1fr;
                min-height: auto;
            }
            .featured-trend-img {
                min-height: 220px;
                aspect-ratio: 16 / 9;
            }
            .featured-trend-content {
                padding: 1.5rem;
            }
            .page-banner {
                min-height: 300px;
            }
        }
        @media (max-width: 768px) {
            .page-banner {
                min-height: 260px;
                background-position: center 40%;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .trend-card-body {
                padding: 1rem 1.1rem 1.25rem;
            }
            .trend-list-item {
                padding: 0.9rem 1rem;
                gap: 0.8rem;
            }
            .trend-list-number {
                width: 30px;
                height: 30px;
                font-size: 0.8rem;
            }
            .cta-section {
                border-radius: var(--radius-lg);
                padding: 2rem 1.25rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .page-banner {
                min-height: 220px;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .badge-accent {
                font-size: 0.65rem;
                padding: 0.2rem 0.7rem;
            }
            .trend-card-img-wrap {
                aspect-ratio: 4 / 3;
            }
            .featured-trend-img {
                min-height: 180px;
            }
            .featured-trend-content {
                padding: 1.2rem;
            }
            .btn-cta,
            .btn-outline,
            .btn-light {
                padding: 0.5rem 1.2rem;
                font-size: 0.8rem;
            }
        }

        /* Focus accessibility */
        a:focus-visible,
        button:focus-visible {
            outline: 2.5px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }
        .nav-link:focus-visible {
            outline-offset: 5px;
        }

/* roulang page: category4 */
:root {
            --color-primary: #1a1815;
            --color-accent: #c9a96e;
            --color-accent-soft: #d4bc8b;
            --color-accent-light: rgba(201, 169, 110, 0.12);
            --color-accent-glow: rgba(201, 169, 110, 0.25);
            --color-bg: #fafaf8;
            --color-bg-warm: #f7f4ef;
            --color-bg-dark: #1a1815;
            --color-text: #2d2a25;
            --color-text-soft: #5c5853;
            --color-text-muted: #8c8984;
            --color-text-light: #b8b5ae;
            --color-border: #e5e1d9;
            --color-border-light: #ede7db;
            --color-white: #ffffff;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.13);
            --shadow-accent: 0 4px 18px rgba(201, 169, 110, 0.22);
            --spacing-xs: 0.5rem;
            --spacing-sm: 0.75rem;
            --spacing-md: 1rem;
            --spacing-lg: 1.5rem;
            --spacing-xl: 2rem;
            --spacing-2xl: 3rem;
            --spacing-3xl: 4rem;
            --spacing-4xl: 5rem;
            --font-serif: 'Noto Serif SC', 'Playfair Display', Georgia, 'Songti SC', serif;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            font-size: 16px;
            letter-spacing: 0.01em;
        }

        img {
            display: block;
            max-width: 100%;
            height: auto;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            letter-spacing: -0.01em;
        }

        /* Container */
        .container-site {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 640px) {
            .container-site {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-site {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(250, 250, 248, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border-light);
            transition: box-shadow var(--transition-base), background var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
            background: rgba(250, 250, 248, 0.95);
        }
        .nav-link {
            position: relative;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-soft);
            padding: 0.4rem 0.1rem;
            transition: color var(--transition-fast);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
            transition: width var(--transition-base);
        }
        .nav-link:hover {
            color: var(--color-primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--color-primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
            background: var(--color-accent);
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            border-radius: var(--radius-full);
            font-size: 0.88rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: var(--color-primary);
            color: #ffffff;
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .btn-cta:hover {
            background: #3d3832;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-cta:active {
            transform: translateY(0);
        }
        .btn-outline-accent {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            border-radius: var(--radius-full);
            font-size: 0.88rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            border: 1.5px solid var(--color-accent);
            color: var(--color-accent);
            background: transparent;
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .btn-outline-accent:hover {
            background: var(--color-accent);
            color: #ffffff;
            box-shadow: var(--shadow-accent);
            transform: translateY(-1px);
        }

        /* Footer */
        .site-footer {
            background: var(--color-bg-dark);
            color: var(--color-text-light);
        }
        .footer-link {
            color: var(--color-text-light);
            font-size: 0.875rem;
            transition: color var(--transition-fast);
            display: inline-flex;
            align-items: center;
        }
        .footer-link:hover {
            color: var(--color-accent-soft);
        }

        /* Page Banner */
        .page-banner {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
            overflow: hidden;
            background-color: #1a1815;
        }
        .page-banner .banner-bg {
            position: absolute;
            inset: 0;
            object-fit: cover;
            width: 100%;
            height: 100%;
            opacity: 0.45;
        }
        .page-banner .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(26, 24, 21, 0.55) 0%, rgba(26, 24, 21, 0.78) 60%, rgba(26, 24, 21, 0.92) 100%);
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 2;
            padding: 3rem 0;
        }

        /* Card Jewelry */
        .card-jewelry {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .card-jewelry:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-accent-soft);
        }
        .card-jewelry .card-image-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 4 / 3;
            background: var(--color-bg-warm);
        }
        .card-jewelry .card-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .card-jewelry:hover .card-image-wrap img {
            transform: scale(1.06);
        }
        .card-jewelry .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(26, 24, 21, 0.82);
            color: var(--color-accent-soft);
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            padding: 4px 10px;
            border-radius: var(--radius-full);
            text-transform: uppercase;
        }
        .card-jewelry .card-body {
            padding: 1.25rem 1.25rem 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-jewelry .card-body h3 {
            font-family: var(--font-serif);
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 0.5rem;
            line-height: 1.35;
        }
        .card-jewelry .card-body p {
            font-size: 0.875rem;
            color: var(--color-text-soft);
            line-height: 1.6;
            flex: 1;
        }
        .card-jewelry .card-meta {
            font-size: 0.75rem;
            color: var(--color-text-muted);
            margin-top: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        /* Gem stat card */
        .stat-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 1.5rem 1.25rem;
            border: 1px solid var(--color-border);
            text-align: center;
            transition: all var(--transition-base);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-accent-soft);
            transform: translateY(-2px);
        }
        .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--color-accent);
            margin-bottom: 0.6rem;
        }
        .stat-card .stat-value {
            font-family: var(--font-serif);
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.2;
        }
        .stat-card .stat-label {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-top: 0.3rem;
            letter-spacing: 0.03em;
        }

        /* FAQ accordion */
        .faq-item {
            border-bottom: 1px solid var(--color-border-light);
            overflow: hidden;
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 1.1rem 0.5rem;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            transition: color var(--transition-fast);
            background: none;
            border: none;
            cursor: pointer;
            font-family: var(--font-sans);
            letter-spacing: 0.01em;
        }
        .faq-question:hover {
            color: var(--color-accent);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-bg-warm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            color: var(--color-text-soft);
            transition: all var(--transition-base);
        }
        .faq-item.open .faq-question .faq-icon {
            background: var(--color-accent-light);
            color: var(--color-accent);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s cubic-bezier(0.25, 0.1, 0.25, 1), padding 0.45s ease;
            padding: 0 0.5rem;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 0.5rem 1.2rem;
        }
        .faq-answer p {
            font-size: 0.875rem;
            color: var(--color-text-soft);
            line-height: 1.7;
        }

        /* Divider */
        .divider-accent {
            width: 48px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 3px;
            margin: 0 auto;
        }
        .divider-accent.left {
            margin: 0;
        }

        /* Section title */
        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 0.5rem;
        }

        /* Mobile menu */
        .mobile-menu {
            position: fixed;
            top: 0;
            right: -100%;
            width: 80%;
            max-width: 380px;
            height: 100vh;
            background: var(--color-white);
            z-index: 200;
            padding: 5rem 1.5rem 2rem;
            transition: right 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
            box-shadow: var(--shadow-xl);
            overflow-y: auto;
        }
        .mobile-menu.open {
            right: 0;
        }
        .mobile-menu .mobile-nav-link {
            display: block;
            padding: 0.8rem 0;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--color-text);
            border-bottom: 1px solid var(--color-border-light);
            transition: color var(--transition-fast);
        }
        .mobile-menu .mobile-nav-link:hover,
        .mobile-menu .mobile-nav-link.active {
            color: var(--color-accent);
            font-weight: 600;
        }
        .mobile-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 150;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.35s ease;
        }
        .mobile-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }

        /* Responsive */
        @media (max-width: 1023px) {
            .page-banner {
                min-height: 300px;
            }
            .page-banner .banner-content {
                padding: 2rem 0;
            }
            .card-jewelry .card-body h3 {
                font-size: 1.05rem;
            }
            .stat-card .stat-value {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 767px) {
            .page-banner {
                min-height: 260px;
            }
            .page-banner .banner-content {
                padding: 1.5rem 0;
            }
            .page-banner h1 {
                font-size: 1.6rem;
            }
            .card-jewelry .card-image-wrap {
                aspect-ratio: 3 / 2;
            }
            .stat-card {
                padding: 1rem 0.75rem;
            }
            .stat-card .stat-value {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 520px) {
            .page-banner {
                min-height: 220px;
            }
            .page-banner h1 {
                font-size: 1.35rem;
            }
            .btn-cta,
            .btn-outline-accent {
                padding: 0.5rem 1.1rem;
                font-size: 0.8rem;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #1a1815;
            --color-accent: #c9a96e;
            --color-accent-light: #dcc898;
            --color-accent-subtle: rgba(201, 169, 110, 0.12);
            --color-bg: #faf9f6;
            --color-bg-warm: #f7f4ef;
            --color-bg-dark: #1e1c18;
            --color-text: #2c2925;
            --color-text-soft: #5c5853;
            --color-text-muted: #8c8984;
            --color-text-light: #b8b5ae;
            --color-border: #e8e4dc;
            --color-border-dark: #3a3630;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 2px rgba(26, 24, 21, 0.04);
            --shadow-sm: 0 2px 8px rgba(26, 24, 21, 0.06);
            --shadow-md: 0 6px 20px rgba(26, 24, 21, 0.08);
            --shadow-lg: 0 12px 36px rgba(26, 24, 21, 0.10);
            --shadow-xl: 0 20px 48px rgba(26, 24, 21, 0.12);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
        }

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

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

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            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: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

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

        input {
            font-family: inherit;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(250, 249, 246, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-base), background var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
            background: rgba(250, 249, 246, 0.95);
        }

        .nav-link {
            position: relative;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-soft);
            padding: 0.35rem 0;
            transition: color var(--transition-fast);
            letter-spacing: 0.01em;
            white-space: nowrap;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-accent);
            border-radius: 1px;
            transition: width var(--transition-base);
        }

        .nav-link:hover {
            color: var(--color-primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--color-primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
            background: var(--color-accent);
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            border-radius: 9999px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: var(--color-primary);
            color: #ffffff;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-cta:hover {
            background: #3a3530;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-xs);
        }
        .btn-cta:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.55rem 1.4rem;
            border-radius: 9999px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            border: 1.5px solid var(--color-border);
            background: transparent;
            color: var(--color-text);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-outline:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            background: var(--color-accent-subtle);
        }
        .btn-outline:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.6rem 1.6rem;
            border-radius: 9999px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: var(--color-accent);
            color: #ffffff;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-accent:hover {
            background: #b8954f;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-accent:active {
            transform: translateY(0);
        }
        .btn-accent:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
        }

        .footer-link {
            color: var(--color-text-light);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
            display: inline-block;
        }
        .footer-link:hover {
            color: #ffffff;
        }

        .card-hover {
            transition: all var(--transition-slow);
        }
        .card-hover:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-xl);
        }
        .card-hover:focus-within {
            outline: 2px solid var(--color-accent);
            outline-offset: 4px;
            border-radius: var(--radius-lg);
        }

        .brand-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: #ffffff;
            border: 1px solid var(--color-border);
            transition: all var(--transition-slow);
            cursor: pointer;
        }
        .brand-card:hover {
            box-shadow: var(--shadow-xl);
            border-color: transparent;
        }
        .brand-card:hover .brand-card-img img {
            transform: scale(1.06);
        }
        .brand-card-img {
            overflow: hidden;
            aspect-ratio: 4/3;
            background: #f0ede7;
        }
        .brand-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .brand-card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(26, 24, 21, 0.82);
            backdrop-filter: blur(6px);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            padding: 4px 12px;
            border-radius: 9999px;
            text-transform: uppercase;
        }

        .stat-number {
            font-family: 'Noto Serif SC', 'Playfair Display', 'Georgia', serif;
            font-weight: 700;
            letter-spacing: -0.02em;
        }

        .faq-item {
            border-bottom: 1px solid var(--color-border);
            transition: all var(--transition-fast);
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            cursor: pointer;
            padding: 1.1rem 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--color-primary);
            transition: color var(--transition-fast);
            user-select: none;
        }
        .faq-question:hover {
            color: var(--color-accent);
        }
        .faq-question i {
            transition: transform var(--transition-base);
            font-size: 0.8rem;
            color: var(--color-text-muted);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--color-accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
            color: var(--color-text-soft);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 1.1rem;
        }

        .mobile-menu-overlay {
            position: fixed;
            inset: 0;
            z-index: 200;
            background: rgba(26, 24, 21, 0.55);
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-base);
        }
        .mobile-menu-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -100%;
            width: min(340px, 82vw);
            height: 100vh;
            z-index: 210;
            background: #ffffff;
            box-shadow: var(--shadow-xl);
            transition: right var(--transition-slow);
            display: flex;
            flex-direction: column;
            padding: 1.5rem;
            overflow-y: auto;
        }
        .mobile-drawer.active {
            right: 0;
        }
        .mobile-nav-link {
            display: block;
            padding: 0.8rem 0;
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-text);
            border-bottom: 1px solid var(--color-border);
            transition: color var(--transition-fast);
        }
        .mobile-nav-link:hover,
        .mobile-nav-link.active {
            color: var(--color-accent);
        }

        @media (max-width: 767px) {
            .brand-card-badge {
                top: 10px;
                left: 10px;
                font-size: 0.65rem;
                padding: 3px 10px;
            }
            .stat-number {
                font-size: 2rem !important;
            }
            .btn-cta,
            .btn-outline,
            .btn-accent {
                padding: 0.55rem 1.2rem;
                font-size: 0.8rem;
            }
        }

        @media (min-width: 768px) and (max-width: 1023px) {
            .brand-card-img {
                aspect-ratio: 16/10;
            }
        }

/* roulang page: category5 */
:root {
            --color-primary: #1a1815;
            --color-accent: #c9a96e;
            --color-accent-deep: #9e7d3e;
            --color-bg: #faf8f4;
            --color-bg-alt: #f0ebe0;
            --color-surface: #ffffff;
            --color-text: #1a1815;
            --color-text-soft: #5c5853;
            --color-text-muted: #8c8984;
            --color-border: #e5dfd5;
            --color-border-light: #f0ebe0;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --radius-2xl: 1.5rem;
            --shadow-card: 0 1px 2px rgba(0, 0, 0, .04), 0 4px 16px rgba(0, 0, 0, .06);
            --shadow-card-hover: 0 2px 8px rgba(0, 0, 0, .06), 0 8px 32px rgba(0, 0, 0, .10);
            --shadow-nav: 0 1px 0 rgba(0, 0, 0, .04), 0 4px 12px rgba(0, 0, 0, .04);
            --transition-fast: 180ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 280ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: 'Inter', 'PingFang SC', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.65;
            color: #1a1815;
            background-color: #faf8f4;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

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

        .container-page {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 640px) {
            .container-page {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-page {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* Site Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-nav);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.97);
            box-shadow: 0 1px 0 rgba(0, 0, 0, .04), 0 6px 20px rgba(0, 0, 0, .07);
        }

        .nav-link {
            position: relative;
            font-size: 0.9rem;
            font-weight: 500;
            color: #5c5853;
            letter-spacing: 0.01em;
            padding: 0.4rem 0;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-accent);
            border-radius: 1px;
            transition: width var(--transition-smooth);
        }
        .nav-link:hover {
            color: #1a1815;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: #1a1815;
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
            background: var(--color-accent);
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            padding: 0.6rem 1.4rem;
            background: #1a1815;
            color: #ffffff;
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 9999px;
            letter-spacing: 0.02em;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }
        .btn-cta:hover {
            background: #3d2f1f;
            box-shadow: 0 4px 20px rgba(0, 0, 0, .15);
            transform: translateY(-1px);
        }
        .btn-cta:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-cta:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            padding: 0.55rem 1.3rem;
            background: transparent;
            color: #1a1815;
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 9999px;
            border: 1.5px solid #d9cfb7;
            letter-spacing: 0.02em;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            cursor: pointer;
        }
        .btn-outline:hover {
            border-color: #1a1815;
            background: #faf8f4;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .06);
        }
        .btn-outline:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
        }

        /* Mobile Menu */
        .mobile-menu-overlay {
            position: fixed;
            inset: 0;
            z-index: 200;
            background: rgba(0, 0, 0, .5);
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }
        .mobile-menu-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu-panel {
            position: fixed;
            top: 0;
            right: 0;
            z-index: 210;
            width: 300px;
            max-width: 85vw;
            height: 100vh;
            background: #ffffff;
            box-shadow: -4px 0 30px rgba(0, 0, 0, .12);
            transform: translateX(100%);
            transition: transform var(--transition-bounce);
            display: flex;
            flex-direction: column;
            padding: 1.5rem;
        }
        .mobile-menu-panel.open {
            transform: translateX(0);
        }
        .mobile-menu-close {
            align-self: flex-end;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #f7f4ef;
            border: none;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #1a1815;
            transition: background var(--transition-fast);
        }
        .mobile-menu-close:hover {
            background: #ede7db;
        }
        .mobile-nav-link {
            display: block;
            padding: 0.75rem 0;
            font-size: 1rem;
            font-weight: 500;
            color: #5c5853;
            border-bottom: 1px solid #f0ebe0;
            transition: color var(--transition-fast);
        }
        .mobile-nav-link:hover,
        .mobile-nav-link.active {
            color: #1a1815;
            font-weight: 600;
        }

        /* Card styles */
        .card-article {
            background: #ffffff;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .card-article:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .card-article .card-image-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #f0ebe0;
        }
        .card-article .card-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .card-article:hover .card-image-wrap img {
            transform: scale(1.04);
        }
        .card-article .card-body {
            padding: 1.25rem 1.25rem 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-tag {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: #9e7d3e;
            background: rgba(201, 169, 110, .1);
            padding: 0.25rem 0.7rem;
            border-radius: 9999px;
            margin-bottom: 0.6rem;
            align-self: flex-start;
        }
        .card-article .card-title {
            font-family: 'Noto Serif SC', 'Playfair Display', Georgia, serif;
            font-size: 1.1rem;
            font-weight: 600;
            color: #1a1815;
            line-height: 1.4;
            margin-bottom: 0.5rem;
        }
        .card-article .card-desc {
            font-size: 0.85rem;
            color: #5c5853;
            line-height: 1.55;
            flex: 1;
        }
        .card-article .card-meta {
            font-size: 0.75rem;
            color: #8c8984;
            margin-top: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        /* Data card */
        .data-card {
            background: #ffffff;
            border-radius: var(--radius-xl);
            padding: 1.5rem 1.25rem;
            box-shadow: var(--shadow-card);
            text-align: center;
            transition: all var(--transition-smooth);
            border: 1px solid transparent;
        }
        .data-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: #e5dfd5;
            transform: translateY(-2px);
        }
        .data-card .data-value {
            font-family: 'Noto Serif SC', 'Playfair Display', Georgia, serif;
            font-size: 2.4rem;
            font-weight: 700;
            color: #1a1815;
            line-height: 1.1;
        }
        .data-card .data-unit {
            font-size: 1rem;
            font-weight: 500;
            color: #c9a96e;
        }
        .data-card .data-label {
            font-size: 0.85rem;
            color: #5c5853;
            margin-top: 0.3rem;
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid #e5dfd5;
            padding: 0;
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            font-size: 1rem;
            font-weight: 600;
            color: #1a1815;
            padding: 1.1rem 0;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            transition: color var(--transition-fast);
            line-height: 1.5;
        }
        .faq-question:hover {
            color: #5c4830;
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: #f7f4ef;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            transition: all var(--transition-smooth);
            color: #5c5853;
        }
        .faq-item.open .faq-icon {
            background: #1a1815;
            color: #ffffff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-answer-inner {
            padding: 0 0 1.2rem;
            font-size: 0.9rem;
            color: #5c5853;
            line-height: 1.7;
        }

        /* Footer */
        .site-footer {
            background: #1a1815;
            color: #b8b5ae;
        }
        .footer-link {
            font-size: 0.85rem;
            color: #b8b5ae;
            transition: color var(--transition-fast);
            display: inline-block;
        }
        .footer-link:hover {
            color: #ffffff;
        }

        /* Banner overlay */
        .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(26, 24, 21, .55) 0%, rgba(26, 24, 21, .25) 40%, rgba(26, 24, 21, .6) 100%);
            pointer-events: none;
        }

        /* Section spacing */
        .section-gap {
            padding-top: 3.5rem;
            padding-bottom: 3.5rem;
        }
        @media (min-width: 768px) {
            .section-gap {
                padding-top: 5rem;
                padding-bottom: 5rem;
            }
        }
        @media (min-width: 1024px) {
            .section-gap {
                padding-top: 6rem;
                padding-bottom: 6rem;
            }
        }

        /* Divider */
        .divider-accent {
            width: 48px;
            height: 3px;
            background: #c9a96e;
            border-radius: 2px;
            margin: 0 auto;
        }

        /* Focus visible */
        *:focus-visible {
            outline: 2px solid #c9a96e;
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* Animation */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-in-up {
            animation: fadeInUp 0.55s cubic-bezier(0.4, 0, 0.2, 1) forwards;
        }
        .animate-delay-100 {
            animation-delay: 0.1s;
        }
        .animate-delay-200 {
            animation-delay: 0.2s;
        }
        .animate-delay-300 {
            animation-delay: 0.3s;
        }

        /* Responsive tweaks */
        @media (max-width: 767px) {
            .card-article .card-title {
                font-size: 1rem;
            }
            .data-card .data-value {
                font-size: 1.8rem;
            }
            .faq-question {
                font-size: 0.95rem;
            }
        }
        @media (max-width: 520px) {
            .btn-cta,
            .btn-outline {
                font-size: 0.8rem;
                padding: 0.5rem 1rem;
            }
            .card-article .card-body {
                padding: 1rem;
            }
            .data-card {
                padding: 1.2rem 0.8rem;
            }
            .data-card .data-value {
                font-size: 1.6rem;
            }
        }

/* roulang page: category6 */
:root {
            --color-brand: #1a1815;
            --color-accent: #c9a96e;
            --color-accent-light: #dcc89a;
            --color-warm: #f7f4ef;
            --color-warm-dark: #ede7db;
            --color-soft: #faf8f5;
            --color-text-primary: #1a1815;
            --color-text-secondary: #5c5853;
            --color-text-muted: #8c8984;
            --color-border-soft: #e5e0d8;
            --color-footer-bg: #1a1815;
            --color-footer-text: #b8b5ae;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-sm: 0 1px 3px rgba(26, 24, 21, 0.06);
            --shadow-md: 0 4px 16px rgba(26, 24, 21, 0.08);
            --shadow-lg: 0 8px 30px rgba(26, 24, 21, 0.1);
            --shadow-xl: 0 16px 48px rgba(26, 24, 21, 0.12);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
        }

        *,
        *::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: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'sans-serif';
            line-height: 1.7;
            color: var(--color-text-primary);
            background-color: #ffffff;
            min-height: 100vh;
        }

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

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

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

        input {
            font-family: inherit;
        }

        /* 导航栏 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border-soft);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-smooth);
        }

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

        .nav-link {
            position: relative;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            letter-spacing: 0.01em;
            padding: 0.4rem 0;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-accent);
            border-radius: 1px;
            transition: width var(--transition-smooth);
        }

        .nav-link:hover {
            color: var(--color-text-primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--color-accent);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 0.55rem 1.4rem;
            background: var(--color-brand);
            color: #ffffff;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            border: 2px solid var(--color-brand);
        }
        .btn-cta:hover {
            background: #2d2a25;
            border-color: #2d2a25;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-cta:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 2px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 0.55rem 1.4rem;
            background: transparent;
            color: var(--color-brand);
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            border: 2px solid var(--color-border-soft);
        }
        .btn-outline:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .btn-outline:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 2px;
        }

        /* 移动端菜单 */
        .mobile-menu-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 200;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }
        .mobile-menu-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-menu-panel {
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            max-width: 85vw;
            height: 100vh;
            background: #ffffff;
            z-index: 210;
            box-shadow: var(--shadow-xl);
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 1rem;
            transition: right var(--transition-smooth);
            overflow-y: auto;
        }
        .mobile-menu-panel.active {
            right: 0;
        }
        .mobile-menu-panel .mobile-nav-link {
            display: block;
            padding: 0.75rem 1rem;
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
        }
        .mobile-menu-panel .mobile-nav-link:hover,
        .mobile-menu-panel .mobile-nav-link.active {
            background: var(--color-warm);
            color: var(--color-accent);
            font-weight: 600;
        }
        .mobile-menu-close {
            align-self: flex-end;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--color-warm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--color-text-primary);
            transition: all var(--transition-fast);
        }
        .mobile-menu-close:hover {
            background: var(--color-warm-dark);
        }

        /* Banner */
        .page-banner {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 24, 21, 0.7) 0%, rgba(26, 24, 21, 0.35) 50%, rgba(26, 24, 21, 0.55) 100%);
            z-index: 1;
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 2;
        }

        /* 卡片 */
        .card-lifestyle {
            background: #ffffff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-soft);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .card-lifestyle:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .card-lifestyle .card-image-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 4 / 3;
        }
        .card-lifestyle .card-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card-lifestyle:hover .card-image-wrap img {
            transform: scale(1.06);
        }
        .card-lifestyle .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(26, 24, 21, 0.8);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: var(--radius-full);
            letter-spacing: 0.04em;
            backdrop-filter: blur(6px);
        }

        /* 文章卡片 */
        .article-card {
            display: flex;
            gap: 1.25rem;
            padding: 1.25rem;
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-soft);
            transition: all var(--transition-smooth);
        }
        .article-card:hover {
            box-shadow: var(--shadow-md);
            border-color: transparent;
            transform: translateY(-2px);
        }
        .article-card .article-thumb {
            flex-shrink: 0;
            width: 120px;
            height: 90px;
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .article-card .article-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .article-card:hover .article-thumb img {
            transform: scale(1.08);
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--color-border-soft);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
            background: #ffffff;
        }
        .faq-item:hover {
            border-color: var(--color-accent-light);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 1.1rem 1.3rem;
            font-weight: 600;
            font-size: 0.95rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            color: var(--color-text-primary);
            background: transparent;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--color-accent);
        }
        .faq-question i {
            transition: transform var(--transition-smooth);
            color: var(--color-text-muted);
            font-size: 0.8rem;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--color-accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-answer-inner {
            padding: 0 1.3rem 1.2rem;
            color: var(--color-text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        /* 页脚 */
        .site-footer {
            background: var(--color-footer-bg);
            color: var(--color-footer-text);
        }
        .footer-link {
            color: var(--color-footer-text);
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }
        .footer-link:hover {
            color: var(--color-accent);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .page-banner {
                min-height: 340px;
            }
            .article-card {
                flex-direction: column;
            }
            .article-card .article-thumb {
                width: 100%;
                height: 180px;
            }
        }
        @media (max-width: 768px) {
            .page-banner {
                min-height: 280px;
            }
            .card-lifestyle .card-image-wrap {
                aspect-ratio: 16 / 10;
            }
        }
        @media (max-width: 520px) {
            .page-banner {
                min-height: 240px;
            }
            .btn-cta,
            .btn-outline {
                padding: 0.5rem 1rem;
                font-size: 0.78rem;
            }
        }

        /* 数据卡片动画 */
        .stat-number {
            font-variant-numeric: tabular-nums;
            font-feature-settings: "tnum";
        }

        /* 分隔装饰 */
        .section-divider {
            width: 48px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 2px;
            margin: 0 auto 0.75rem;
        }

        /* 滚动吸顶阴影 */
        @media (min-width: 1024px) {
            .site-header.scrolled {
                box-shadow: 0 4px 24px rgba(26, 24, 21, 0.1);
            }
        }