/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --bg-body: #070A10;
            --bg-card: #10161F;
            --bg-elevated: #0E141D;
            --text-body: #B8C0CC;
            --text-muted: #7A8494;
            --text-heading: #F2F4F8;
            --border-color: rgba(255, 255, 255, 0.08);
            --brand-accent: #C9A96E;
            --brand-accent-rgb: 201, 169, 110;
            --button-bg: #C9A96E;
            --button-text: #0B1120;
            --radius: 10px;
            --radius-sm: 4px;
            --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.2);
            --transition-base: all 0.25s ease;
            --font-cn: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            --font-en: "Inter", "Helvetica Neue", Arial, sans-serif;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-cn);
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.8;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: 1200px;
            padding-left: 16px;
            padding-right: 16px;
        }
        .section {
            padding: 80px 0;
        }
        .section-sm {
            padding: 48px 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
        }

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4 {
            color: var(--text-heading);
            font-weight: 600;
            letter-spacing: -0.02em;
        }
        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 600;
            margin-bottom: 24px;
            margin-top: 0;
            color: var(--text-heading);
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--brand-accent);
            margin-bottom: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border: 1px solid rgba(var(--brand-accent-rgb), 0.3);
            border-radius: 999px;
            background: rgba(var(--brand-accent-rgb), 0.06);
        }
        .text-muted {
            color: var(--text-muted) !important;
        }

        /* ===== Buttons ===== */
        .btn-brand {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--button-bg);
            color: var(--button-text);
            border: none;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            letter-spacing: 0.02em;
            transition: var(--transition-base);
            cursor: pointer;
            line-height: 1;
        }
        .btn-brand:hover {
            background: #d4b57f;
            color: #070A10;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(var(--brand-accent-rgb), 0.22);
        }
        .btn-brand:focus-visible {
            outline: 2px solid var(--brand-accent);
            outline-offset: 2px;
        }
        .btn-link-arrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: none;
            border: none;
            color: var(--text-body);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 0;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .btn-link-arrow i {
            transition: transform 0.25s ease;
        }
        .btn-link-arrow:hover {
            color: var(--brand-accent);
        }
        .btn-link-arrow:hover i {
            transform: translateX(4px);
        }

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 64px;
            background: transparent;
            transition: var(--transition-base);
            border-bottom: 1px solid transparent;
        }
        .site-header.scrolled {
            background: rgba(7, 10, 16, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom-color: var(--border-color);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-heading);
            letter-spacing: 0.01em;
            white-space: nowrap;
        }
        .brand-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--brand-accent);
            flex-shrink: 0;
            display: inline-block;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .main-nav .nav-link {
            font-size: 0.95rem;
            font-weight: 400;
            color: var(--text-body);
            position: relative;
            padding: 6px 0;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .main-nav .nav-link:hover {
            color: var(--text-heading);
        }
        .main-nav .nav-link:hover::after {
            width: 100%;
        }
        .main-nav .nav-link.active {
            color: var(--text-heading);
            font-weight: 500;
        }
        .main-nav .nav-link.active::after {
            width: 100%;
        }
        .main-nav .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 1px;
            background: var(--brand-accent);
            transition: width 0.3s ease;
        }
        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .header-cta i {
            transition: transform 0.25s ease;
        }
        .header-cta:hover {
            color: var(--brand-accent);
        }
        .header-cta:hover i {
            transform: translateX(4px);
        }
        .nav-toggler {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            width: 40px;
            height: 40px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            cursor: pointer;
            padding: 0;
            transition: var(--transition-base);
            z-index: 1101;
        }
        .nav-toggler span {
            display: block;
            width: 16px;
            height: 1px;
            background: var(--text-heading);
            transition: var(--transition-base);
        }
        .nav-toggler:hover {
            border-color: var(--brand-accent);
        }
        .nav-toggler.active span:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }
        .nav-toggler.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggler.active span:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }

        /* Mobile nav overlay */
        .mobile-nav-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(7, 10, 16, 0.98);
            z-index: 1100;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
            backdrop-filter: blur(12px);
        }
        .mobile-nav-overlay.open {
            opacity: 1;
            visibility: visible;
        }
        .mobile-nav-overlay .mobile-nav-link {
            font-size: 1.2rem;
            color: var(--text-body);
            padding: 12px 0;
            transition: var(--transition-base);
            display: block;
            text-align: center;
        }
        .mobile-nav-overlay .mobile-nav-link:hover {
            color: var(--brand-accent);
        }
        .mobile-nav-overlay .mobile-nav-link.active {
            color: var(--text-heading);
            font-weight: 600;
        }
        .mobile-nav-overlay .mobile-cta {
            margin-top: 24px;
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .header-cta {
                display: none;
            }
            .nav-toggler {
                display: flex;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            background-image:
                linear-gradient(to bottom, rgba(7, 10, 16, 0.72), rgba(7, 10, 16, 0.9)),
                url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 120px 0 80px;
            overflow: hidden;
        }
        .hero-content {
            max-width: 720px;
        }
        .hero .hero-tagline {
            display: inline-block;
            font-size: 0.85rem;
            letter-spacing: 0.08em;
            color: var(--brand-accent);
            border: 1px solid rgba(var(--brand-accent-rgb), 0.3);
            border-radius: 999px;
            padding: 6px 16px;
            margin-bottom: 24px;
            background: rgba(var(--brand-accent-rgb), 0.05);
            opacity: 0;
            animation: heroUp 0.5s ease 0.1s forwards;
        }
        .hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.5rem);
            font-weight: 650;
            letter-spacing: -0.02em;
            line-height: 1.25;
            color: var(--text-heading);
            margin-bottom: 20px;
            opacity: 0;
            animation: heroUp 0.5s ease 0.2s forwards;
        }
        .hero .hero-sub {
            font-size: clamp(1rem, 1.5vw, 1.15rem);
            line-height: 1.8;
            color: var(--text-body);
            margin-bottom: 32px;
            max-width: 600px;
            opacity: 0;
            animation: heroUp 0.5s ease 0.3s forwards;
        }
        .hero .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            opacity: 0;
            animation: heroUp 0.5s ease 0.4s forwards;
        }
        .hero-bottom-bar {
            position: absolute;
            left: 0;
            right: 0;
            bottom: 40px;
            display: flex;
            justify-content: center;
            gap: 32px;
            font-size: 0.8rem;
            letter-spacing: 0.06em;
            color: var(--text-muted);
            padding: 0 16px;
            opacity: 0;
            animation: heroUp 0.5s ease 0.5s forwards;
        }
        .hero-bottom-bar span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .hero-bottom-bar span::before {
            content: "";
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--brand-accent);
            opacity: 0.7;
        }
        @keyframes heroUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        @media (max-width: 768px) {
            .hero {
                min-height: auto;
                padding: 100px 0 60px;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-bottom-bar {
                position: static;
                margin-top: 40px;
                flex-direction: column;
                align-items: center;
                gap: 8px;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            .hero .hero-tagline,
            .hero h1,
            .hero .hero-sub,
            .hero .hero-actions,
            .hero-bottom-bar {
                animation: none;
                opacity: 1;
            }
            .btn-brand:hover {
                transform: none;
            }
            .card-grid .card-img img:hover {
                transform: none;
            }
        }

        /* ===== Trust bar ===== */
        .trust-bar {
            background: #0B0F16;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            padding: 20px 0;
        }
        .trust-bar .trust-inner {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 32px;
        }
        .trust-bar .trust-item {
            font-size: 0.85rem;
            letter-spacing: 0.1em;
            color: var(--text-body);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }
        .trust-bar .trust-item::before {
            content: "✦";
            color: var(--brand-accent);
            font-size: 0.7rem;
        }
        @media (max-width: 768px) {
            .trust-bar .trust-inner {
                gap: 16px;
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Story Section ===== */
        .story-section {
            padding: 80px 0;
        }
        .story-media {
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition-base);
            aspect-ratio: 16/10;
        }
        .story-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .story-media:hover {
            border-color: rgba(var(--brand-accent-rgb), 0.3);
        }
        .story-media:hover img {
            transform: scale(1.01);
        }
        .story-content p {
            font-size: 1rem;
            line-height: 1.8;
            color: var(--text-body);
            margin-bottom: 16px;
        }
        @media (max-width: 992px) {
            .story-section .row {
                gap: 32px;
            }
        }

        /* ===== Featured Cards ===== */
        .featured-section {
            padding: 80px 0;
            border-top: 1px solid var(--border-color);
        }
        .featured-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }
        .featured-head .btn-link-arrow {
            font-size: 0.9rem;
        }
        .featured-main-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            height: 100%;
            transition: var(--transition-base);
        }
        .featured-main-card:hover {
            border-color: rgba(var(--brand-accent-rgb), 0.35);
        }
        .featured-main-card .card-media {
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
        }
        .featured-main-card .card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .featured-main-card:hover .card-media img {
            transform: scale(1.02);
        }
        .featured-main-card .card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            flex: 1;
        }
        .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            letter-spacing: 0.08em;
            color: var(--text-body);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 999px;
            padding: 4px 12px;
            font-weight: 500;
            transition: var(--transition-base);
            align-self: flex-start;
        }
        .card-tag:hover {
            border-color: var(--brand-accent);
            color: var(--brand-accent);
        }
        .featured-main-card .card-title {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-heading);
            line-height: 1.4;
            margin: 0;
        }
        .featured-main-card .card-summary {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
            flex: 1;
        }
        .featured-main-card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            letter-spacing: 0.04em;
            color: var(--text-muted);
        }
        .featured-main-card .card-meta .meta-time::before {
            content: "·";
            margin-right: 8px;
            color: var(--text-muted);
        }
        .featured-side-list {
            display: flex;
            flex-direction: column;
        }
        .side-list-item {
            display: flex;
            flex-direction: column;
            gap: 8px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition-base);
        }
        .side-list-item:first-child {
            padding-top: 0;
        }
        .side-list-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .side-list-item .item-title {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-heading);
            line-height: 1.5;
            transition: var(--transition-base);
        }
        .side-list-item:hover .item-title {
            color: var(--brand-accent);
        }
        .side-list-item .item-summary {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .side-list-item .item-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        .side-list-item .item-meta .tag {
            display: inline-block;
            font-size: 0.7rem;
            letter-spacing: 0.06em;
            color: var(--text-body);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 999px;
            padding: 2px 10px;
        }
        .side-list-item .item-meta .tag:hover {
            border-color: var(--brand-accent);
        }
        @media (max-width: 992px) {
            .featured-section .row {
                gap: 32px;
            }
        }

        /* ===== Info List / CMS Area ===== */
        .info-section {
            padding: 80px 0;
            border-top: 1px solid var(--border-color);
            background: var(--bg-body);
        }
        .info-list-wrap {
            border-top: 1px solid var(--border-color);
        }
        .info-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 24px 4px;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition-base);
        }
        .info-item:hover {
            background: rgba(255, 255, 255, 0.02);
            padding-left: 8px;
        }
        .info-item .info-tag {
            flex-shrink: 0;
            display: inline-block;
            font-size: 0.7rem;
            letter-spacing: 0.06em;
            color: var(--text-body);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 999px;
            padding: 3px 10px;
            margin-top: 2px;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .info-item .info-tag:hover {
            border-color: var(--brand-accent);
            color: var(--brand-accent);
        }
        .info-item .info-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .info-item .info-title {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-heading);
            line-height: 1.5;
            transition: var(--transition-base);
        }
        .info-item:hover .info-title {
            color: var(--brand-accent);
        }
        .info-item .info-summary {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .info-item .info-time {
            font-size: 0.75rem;
            color: var(--text-muted);
            letter-spacing: 0.04em;
        }
        .info-empty {
            text-align: center;
            padding: 48px 0;
            color: var(--text-muted);
            font-size: 0.95rem;
            border-top: 1px solid var(--border-color);
            margin-top: 24px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 24px;
            margin-bottom: 24px;
        }
        .sidebar-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-color);
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-cloud .tag-item {
            display: inline-block;
            font-size: 0.8rem;
            color: var(--text-body);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 999px;
            padding: 5px 14px;
            transition: var(--transition-base);
        }
        .tag-cloud .tag-item:hover {
            border-color: var(--brand-accent);
            color: var(--brand-accent);
        }
        @media (max-width: 992px) {
            .info-section .row {
                gap: 32px;
            }
        }
        @media (max-width: 576px) {
            .info-item {
                flex-direction: column;
                gap: 6px;
            }
        }

        /* ===== Topic Cards ===== */
        .topic-section {
            padding: 80px 0;
            border-top: 1px solid var(--border-color);
            background: var(--bg-card);
        }
        .topic-card {
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            height: 100%;
            transition: var(--transition-base);
        }
        .topic-card:hover {
            border-color: rgba(var(--brand-accent-rgb), 0.35);
        }
        .topic-card .topic-media {
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
        }
        .topic-card .topic-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .topic-card:hover .topic-media img {
            transform: scale(1.02);
        }
        .topic-card .topic-body {
            padding: 20px 24px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }
        .topic-card .topic-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin: 0;
            transition: var(--transition-base);
        }
        .topic-card:hover .topic-title {
            color: var(--brand-accent);
        }
        .topic-card .topic-summary {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
            flex: 1;
        }
        .topic-card .topic-meta {
            font-size: 0.75rem;
            color: var(--text-muted);
            letter-spacing: 0.04em;
            padding-top: 8px;
            border-top: 1px solid var(--border-color);
        }
        .topic-card .topic-meta a {
            color: var(--brand-accent);
        }
        .topic-card .topic-meta a:hover {
            text-decoration: underline;
        }
        @media (max-width: 992px) {
            .topic-section .row {
                gap: 24px;
            }
        }

        /* ===== Compare Section ===== */
        .compare-section {
            padding: 80px 0;
            border-top: 1px solid var(--border-color);
        }
        .compare-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 32px;
            transition: var(--transition-base);
            height: 100%;
        }
        .compare-card:hover {
            border-color: rgba(var(--brand-accent-rgb), 0.35);
        }
        .compare-card .compare-label {
            font-size: 0.75rem;
            letter-spacing: 0.1em;
            color: var(--brand-accent);
            text-transform: uppercase;
            margin-bottom: 12px;
            display: block;
        }
        .compare-card .compare-title {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 16px;
        }
        .compare-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .compare-card ul li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 10px;
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.7;
        }
        .compare-card ul li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 12px;
            width: 10px;
            height: 1px;
            background: var(--brand-accent);
        }
        @media (max-width: 992px) {
            .compare-section .row {
                gap: 24px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
            border-top: 1px solid var(--border-color);
        }
        .faq-section .section-title {
            text-align: center;
        }
        .faq-wrap {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-wrap .accordion-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid var(--border-color);
            border-radius: 0 !important;
        }
        .faq-wrap .accordion-button {
            background: transparent;
            color: var(--text-heading);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 20px 40px 20px 0;
            height: 56px;
            box-shadow: none;
            border: none;
            position: relative;
            transition: var(--transition-base);
        }
        .faq-wrap .accordion-button:hover {
            color: var(--brand-accent);
        }
        .faq-wrap .accordion-button:not(.collapsed) {
            background: transparent;
            color: var(--text-heading);
            box-shadow: none;
        }
        .faq-wrap .accordion-button::after {
            background-image: none !important;
            content: "+";
            font-size: 1.2rem;
            font-weight: 300;
            color: var(--brand-accent);
            width: auto;
            height: auto;
            line-height: 1;
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            transition: transform 0.3s ease;
        }
        .faq-wrap .accordion-button:not(.collapsed)::after {
            content: "−";
            transform: translateY(-50%);
        }
        .faq-wrap .accordion-body {
            padding: 0 40px 20px 0;
            color: var(--text-body);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        @media (max-width: 576px) {
            .faq-wrap .accordion-button {
                font-size: 0.85rem;
                padding-right: 32px;
            }
            .faq-wrap .accordion-body {
                padding-right: 24px;
            }
        }

        /* ===== Subscribe CTA ===== */
        .cta-section {
            padding: 100px 0;
            border-top: 1px solid var(--border-color);
            text-align: center;
        }
        .cta-section .cta-wrap {
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-section .section-title {
            margin-bottom: 16px;
        }
        .cta-section .cta-desc {
            font-size: 1rem;
            color: var(--text-body);
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .subscribe-form .row {
            align-items: stretch;
        }
        .subscribe-form .form-control {
            background: var(--bg-elevated);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            height: 48px;
            color: var(--text-heading);
            font-size: 0.95rem;
            padding: 0 16px;
            transition: var(--transition-base);
            width: 100%;
        }
        .subscribe-form .form-control::placeholder {
            color: var(--text-muted);
        }
        .subscribe-form .form-control:focus {
            border-color: var(--brand-accent);
            background: var(--bg-elevated);
            color: var(--text-heading);
            box-shadow: none;
        }
        .subscribe-form .btn-brand {
            width: 100%;
        }
        .cta-note {
            margin-top: 16px;
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        @media (max-width: 576px) {
            .subscribe-form .row {
                gap: 12px;
            }
            .subscribe-form .col-md-8,
            .subscribe-form .col-md-4 {
                width: 100%;
                flex: 0 0 100%;
                max-width: 100%;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #05070C;
            border-top: 1px solid var(--border-color);
            padding: 60px 0 0;
        }
        .footer-brand {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-heading);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .footer-brand .brand-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--brand-accent);
        }
        .footer-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
            max-width: 280px;
        }
        .footer-contact {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.8;
        }
        .footer-contact a {
            color: var(--text-body);
        }
        .footer-contact a:hover {
            color: var(--brand-accent);
        }
        .footer-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 0.85rem;
            color: var(--text-body);
            transition: var(--transition-base);
        }
        .footer-links a:hover {
            color: var(--brand-accent);
            text-decoration: none;
        }
        .footer-bottom {
            margin-top: 48px;
            padding: 20px 0;
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        @media (max-width: 768px) {
            .site-footer .row {
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Utility ===== */
        .divider-line {
            border: none;
            border-top: 1px solid var(--border-color);
            margin: 0;
        }
        @media (prefers-reduced-motion: reduce) {
            * {
                transition: none !important;
                animation: none !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: category1 */
:root {
            --bg-body: #070A10;
            --bg-card: #10161F;
            --bg-elevated: #0E141D;
            --text-body: #B8C0CC;
            --text-muted: #7A8494;
            --text-heading: #F2F4F8;
            --border-color: rgba(255, 255, 255, 0.08);
            --brand-accent: #C9A96E;
            --brand-accent-rgb: 201, 169, 110;
            --button-bg: #C9A96E;
            --button-text: #0B0F16;
            --radius: 10px;
            --radius-sm: 4px;
            --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.2);
            --transition-base: all 0.25s ease;
            --placeholder-color: #5A6474;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-body);
            color: var(--text-body);
            line-height: 1.8;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
        }

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

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

        a:hover {
            color: var(--brand-accent);
            text-decoration: none;
        }

        button {
            background: none;
            border: none;
            cursor: pointer;
        }

        .container {
            max-width: 1200px;
            padding-left: 16px;
            padding-right: 16px;
        }

        .section {
            padding: 80px 0;
        }

        @media (max-width: 767px) {
            .section {
                padding: 48px 0;
            }
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 64px;
            background: transparent;
            display: flex;
            align-items: center;
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(7, 10, 16, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-heading);
            letter-spacing: 0.01em;
            line-height: 1;
        }

        .brand-logo:hover {
            color: var(--text-heading);
        }

        .brand-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--brand-accent);
            display: inline-block;
            flex: none;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
            margin-left: 40px;
        }

        .nav-link {
            font-size: 0.95rem;
            font-weight: 400;
            color: var(--text-body);
            padding: 8px 0;
            position: relative;
            letter-spacing: 0.02em;
            line-height: 1.2;
            transition: var(--transition-base);
        }

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

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

        .nav-link.active {
            color: var(--text-heading);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 1px;
            background: var(--brand-accent);
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-body);
            font-weight: 500;
            letter-spacing: 0.03em;
            line-height: 1;
        }

        .header-cta:hover {
            color: var(--brand-accent);
        }

        .header-cta i {
            font-size: 0.8rem;
            transition: transform 0.25s ease;
        }

        .header-cta:hover i {
            transform: translateX(4px);
        }

        .nav-toggler {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            background: transparent;
            z-index: 1002;
        }

        .nav-toggler span {
            display: block;
            width: 18px;
            height: 1px;
            background: var(--text-heading);
            transition: var(--transition-base);
        }

        .nav-toggler.active span:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }

        .nav-toggler.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggler.active span:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }

        @media (max-width: 767px) {
            .header-inner {
                flex-wrap: wrap;
            }

            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: flex-start;
                background: rgba(7, 10, 16, 0.98);
                max-height: 0;
                overflow: hidden;
                margin: 0;
                padding: 0 24px;
                gap: 0;
                transition: max-height 0.35s ease, padding 0.3s ease;
            }

            .main-nav.open {
                max-height: 100vh;
                padding: 32px 24px;
                border-bottom: 1px solid var(--border-color);
            }

            .main-nav .nav-link {
                font-size: 1.2rem;
                padding: 14px 0;
                width: 100%;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }

            .main-nav .nav-link.active::after {
                display: none;
            }

            .main-nav .nav-link.active {
                color: var(--brand-accent);
            }

            .header-cta {
                display: none;
            }

            .nav-toggler {
                display: flex;
            }
        }

        /* ========== Category Hero ========== */
        .category-hero {
            position: relative;
            padding: 150px 0 70px;
            background:
                linear-gradient(rgba(7, 10, 16, 0.72), rgba(7, 10, 16, 0.9)),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            border-bottom: 1px solid var(--border-color);
        }

        .category-hero .breadcrumb {
            margin-bottom: 20px;
            background: transparent;
            padding: 0;
            font-size: 0.8rem;
            letter-spacing: 0.06em;
            color: var(--text-muted);
        }

        .category-hero .breadcrumb a {
            color: var(--text-muted);
        }

        .category-hero .breadcrumb a:hover {
            color: var(--brand-accent);
        }

        .category-hero .breadcrumb-item+.breadcrumb-item::before {
            content: '>';
            color: var(--text-muted);
            padding: 0 6px;
        }

        .hero-kicker {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 500;
            letter-spacing: 0.1em;
            text-transform: none;
            color: var(--brand-accent);
            border: 1px solid rgba(var(--brand-accent-rgb), 0.3);
            border-radius: 999px;
            padding: 4px 14px;
            margin-bottom: 18px;
        }

        .category-hero h1 {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            font-weight: 700;
            color: var(--text-heading);
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            max-width: 640px;
        }

        .category-hero .hero-desc {
            font-size: 1rem;
            line-height: 1.8;
            color: var(--text-body);
            max-width: 640px;
            margin: 0;
        }

        .category-hero .hero-bottom {
            margin-top: 40px;
            font-size: 0.8rem;
            letter-spacing: 0.06em;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .category-hero .hero-bottom i {
            color: var(--brand-accent);
            font-size: 0.7rem;
        }

        .category-hero .hero-title {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 0.5s ease forwards 0.1s;
        }

        .category-hero .hero-desc {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeUp 0.5s ease forwards 0.2s;
        }

        @keyframes fadeUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ========== Content Grid ========== */
        .content-grid-section {
            background: var(--bg-body);
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 32px;
            gap: 16px;
        }

        .section-title {
            font-size: clamp(1.6rem, 3vw, 2rem);
            font-weight: 600;
            color: var(--text-heading);
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin: 0;
        }

        .section-head .section-sub {
            margin: 8px 0 0;
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .section-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
            color: var(--text-body);
            white-space: nowrap;
        }

        .section-more:hover {
            color: var(--brand-accent);
        }

        .section-more i {
            font-size: 0.8rem;
            transition: transform 0.25s ease;
        }

        .section-more:hover i {
            transform: translateX(4px);
        }

        .category-card {
            background: var(--bg-card);
            border: 1px solid transparent;
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: var(--transition-base);
        }

        .category-card:hover {
            border-color: rgba(var(--brand-accent-rgb), 0.35);
        }

        .card-thumb {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-elevated);
        }

        .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }

        .category-card:hover .card-thumb img {
            transform: scale(1.02);
        }

        .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 14px;
            gap: 12px;
        }

        .badge-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 500;
            letter-spacing: 0.06em;
            color: var(--text-body);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 999px;
            padding: 3px 12px;
            line-height: 1.4;
            transition: var(--transition-base);
        }

        .badge-tag:hover {
            border-color: rgba(var(--brand-accent-rgb), 0.4);
            color: var(--text-heading);
        }

        .card-date {
            font-size: 0.8rem;
            letter-spacing: 0.06em;
            color: var(--text-muted);
        }

        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-heading);
            line-height: 1.4;
            margin: 0 0 12px;
            letter-spacing: -0.01em;
        }

        .category-card:hover .card-body h3 {
            color: var(--brand-accent);
        }

        .card-body p {
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--text-body);
            margin: 0;
            flex-grow: 1;
        }

        /* ========== Feature Highlights ========== */
        .feature-section {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .feature-item {
            padding: 32px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            background: transparent;
            height: 100%;
            transition: var(--transition-base);
        }

        .feature-item:hover {
            border-color: rgba(var(--brand-accent-rgb), 0.35);
            background: var(--bg-elevated);
        }

        .feature-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(var(--brand-accent-rgb), 0.1);
            color: var(--brand-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            margin-bottom: 20px;
        }

        .feature-item h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .feature-item p {
            font-size: 0.92rem;
            line-height: 1.7;
            color: var(--text-muted);
            margin: 0;
        }

        /* ========== Scene Section ========== */
        .scene-section .scene-intro {
            font-size: 0.95rem;
            line-height: 1.8;
            color: var(--text-muted);
            margin-top: 16px;
            margin-bottom: 0;
        }

        .scene-list {
            border-top: 1px solid var(--border-color);
        }

        .scene-item {
            display: flex;
            gap: 18px;
            padding: 20px 4px;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition-base);
        }

        .scene-item:hover {
            padding-left: 12px;
        }

        .scene-item .scene-index {
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--brand-accent);
            flex: none;
            width: 28px;
            line-height: 1.8;
        }

        .scene-item h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin: 0 0 6px;
            line-height: 1.4;
        }

        .scene-item p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: var(--text-muted);
            margin: 0;
        }

        /* ========== Process Section ========== */
        .process-section {
            background: var(--bg-body);
        }

        .process-step {
            text-align: center;
            padding: 20px 16px;
            position: relative;
            height: 100%;
        }

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            border: 1px solid rgba(var(--brand-accent-rgb), 0.35);
            color: var(--brand-accent);
            font-size: 1rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
            background: rgba(var(--brand-accent-rgb), 0.06);
        }

        .process-step h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .process-step p {
            font-size: 0.88rem;
            line-height: 1.7;
            color: var(--text-muted);
            margin: 0;
        }

        .process-step::after {
            content: '';
            position: absolute;
            top: 46px;
            right: -15px;
            width: 30px;
            height: 1px;
            background: rgba(var(--brand-accent-rgb), 0.2);
            display: block;
        }

        .col-md-3:last-child .process-step::after {
            display: none;
        }

        @media (max-width: 767px) {
            .process-step::after {
                display: none;
            }

            .process-step {
                margin-bottom: 24px;
            }
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
        }

        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }

        .accordion-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid var(--border-color);
            border-radius: 0 !important;
        }

        .accordion-button {
            background: transparent !important;
            color: var(--text-heading) !important;
            font-size: 0.95rem;
            font-weight: 500;
            height: 56px;
            padding: 0 40px 0 0;
            box-shadow: none !important;
            outline: none;
            line-height: 1.5;
            border: none !important;
            letter-spacing: 0.01em;
            transition: var(--transition-base);
        }

        .accordion-button:not(.collapsed) {
            background: transparent !important;
            color: var(--text-heading) !important;
        }

        .accordion-button:hover {
            color: var(--brand-accent) !important;
        }

        .accordion-button::after {
            background-image: none;
            content: '+';
            font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
            font-size: 1.4rem;
            font-weight: 300;
            color: var(--brand-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 20px;
            height: 20px;
            top: 50%;
            right: 0;
            transition: transform 0.25s ease;
        }

        .accordion-button:not(.collapsed)::after {
            background-image: none;
            content: '−';
            transform: none;
        }

        .accordion-body {
            padding: 0 0 20px;
            color: var(--text-body);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .accordion-body p {
            margin: 0;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: var(--bg-body);
            text-align: center;
            padding: 100px 0;
        }

        .cta-inner {
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2rem);
            font-weight: 600;
            color: var(--text-heading);
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .cta-section .cta-sub {
            font-size: 1rem;
            color: var(--text-muted);
            margin-bottom: 40px;
            line-height: 1.8;
        }

        .cta-form .form-control {
            height: 48px;
            background: var(--bg-elevated);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            color: var(--text-body);
            font-size: 0.95rem;
            padding: 0 16px;
        }

        .cta-form .form-control:focus {
            background: var(--bg-elevated);
            border-color: var(--brand-accent);
            box-shadow: none;
            color: var(--text-body);
        }

        .cta-form .form-control::placeholder {
            color: var(--placeholder-color);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 28px;
            background: var(--button-bg);
            color: var(--button-text);
            font-size: 0.95rem;
            font-weight: 500;
            border: none;
            border-radius: var(--radius-sm);
            letter-spacing: 0.02em;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: #D8B87F;
            color: var(--button-text);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            background: #B89A62;
            color: var(--button-text);
            transform: translateY(0);
        }

        .btn-primary:focus,
        .btn-primary:focus-visible {
            box-shadow: 0 0 0 3px rgba(var(--brand-accent-rgb), 0.25);
            outline: none;
            color: var(--button-text);
        }

        .btn-primary i {
            font-size: 0.85rem;
        }

        .cta-privacy {
            margin-top: 20px;
            font-size: 0.75rem;
            color: var(--placeholder-color);
            letter-spacing: 0.03em;
        }

        @media (max-width: 767px) {
            .cta-section {
                padding: 64px 0;
            }

            .cta-form .btn-primary {
                width: 100%;
                margin-top: 12px;
            }
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #05070C;
            border-top: 1px solid var(--border-color);
            padding-top: 60px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
        }

        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.7;
            color: var(--text-muted);
            margin-bottom: 20px;
            max-width: 280px;
        }

        .footer-contact {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.9;
        }

        .footer-contact a {
            color: var(--text-muted);
        }

        .footer-contact a:hover {
            color: var(--brand-accent);
        }

        .footer-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }

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

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            display: inline-block;
        }

        .footer-links a:hover {
            color: var(--brand-accent);
            padding-left: 4px;
        }

        .footer-bottom {
            margin-top: 48px;
            padding: 20px 0;
            border-top: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.78rem;
            color: var(--text-muted);
            letter-spacing: 0.04em;
        }

        @media (max-width: 767px) {
            .site-footer {
                padding-top: 40px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 6px;
                text-align: center;
            }
        }

        /* ========== Bootstrap Overrides ========== */
        .breadcrumb {
            margin-bottom: 0;
        }

        .form-control {
            background-color: var(--bg-elevated);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            color: var(--text-body);
            font-size: 0.95rem;
            height: 48px;
        }

        .form-control:focus {
            background-color: var(--bg-elevated);
            border-color: var(--brand-accent);
            box-shadow: none;
            color: var(--text-body);
        }

        .row> [class*="col-"] {
            margin-bottom: 24px;
        }

        @media (max-width: 767px) {
            .row> [class*="col-"] {
                margin-bottom: 16px;
            }
        }

        /* ========== Reduced Motion ========== */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }

            .category-hero .hero-title,
            .category-hero .hero-desc {
                opacity: 1;
                transform: none;
                animation: none;
            }

            a,
            button,
            .btn,
            .nav-link,
            .card,
            .form-control,
            .feature-item,
            .scene-item,
            .footer-links a {
                transition: none !important;
            }
        }

/* roulang page: article */
:root {
    --bg-body: #070A10;
    --bg-card: #10161F;
    --bg-elevated: #0E141D;
    --text-body: #B8C0CC;
    --text-muted: #7A8494;
    --text-heading: #F2F4F8;
    --text-placeholder: #5A6474;
    --border-color: rgba(255,255,255,0.08);
    --border-strong: rgba(255,255,255,0.15);
    --brand-accent: #C9A96E;
    --brand-accent-rgb: 201,169,110;
    --button-bg: #C9A96E;
    --button-text: #0A0C12;
    --radius: 10px;
    --radius-sm: 4px;
    --shadow-card: 0 2px 8px rgba(0,0,0,0.2);
    --transition-base: all 0.25s ease;
    --white-02: rgba(255,255,255,0.02);
    --white-04: rgba(255,255,255,0.04);
    --white-05: rgba(255,255,255,0.05);
    --white-10: rgba(255,255,255,0.1);
    --white-15: rgba(255,255,255,0.15);
}
*, *::before, *::after {
    box-sizing: border-box;
}
body {
    margin: 0;
    font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-body);
    color: var(--text-body);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img {
    max-width: 100%;
    display: block;
}
a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-base);
}
a:hover {
    text-decoration: none;
}
button, input, select, textarea {
    font-family: inherit;
}
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--text-heading);
    margin-top: 0;
    line-height: 1.4;
}
.container {
    max-width: 1200px;
}
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    z-index: 1030;
    background: transparent;
    border-bottom: 1px solid transparent;
    transition: var(--transition-base);
}
.site-header.scrolled {
    background: rgba(7,10,16,0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom-color: var(--border-color);
}
.header-inner {
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}
.brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-heading);
    letter-spacing: 0.02em;
    white-space: nowrap;
}
.brand-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--brand-accent);
    flex-shrink: 0;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}
.main-nav .nav-link {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-muted);
    padding: 0 2px;
    position: relative;
    transition: var(--transition-base);
}
.main-nav .nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 100%;
    height: 1px;
    background: var(--brand-accent);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.25s ease;
}
.main-nav .nav-link:hover,
.main-nav .nav-link.active {
    color: var(--text-heading);
}
.main-nav .nav-link:hover::after,
.main-nav .nav-link.active::after {
    transform: scaleX(1);
}
.nav-cta-mobile {
    display: none;
}
.header-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-body);
    white-space: nowrap;
    transition: var(--transition-base);
}
.header-cta i {
    font-size: 0.8rem;
    transition: transform 0.25s ease;
}
.header-cta:hover {
    color: var(--brand-accent);
}
.header-cta:hover i {
    transform: translateX(4px);
}
.nav-toggler {
    display: none;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-strong);
    border-radius: 50%;
    background: transparent;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    padding: 0;
    transition: var(--transition-base);
}
.nav-toggler span {
    display: block;
    width: 16px;
    height: 1px;
    background: var(--text-body);
    transition: var(--transition-base);
}
.nav-toggler:hover {
    border-color: var(--brand-accent);
}
.nav-toggler.open span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}
.nav-toggler.open span:nth-child(2) {
    opacity: 0;
}
.nav-toggler.open span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}
.article-page {
    padding-top: 64px;
}
.article-header {
    padding: 80px 0 40px;
    border-bottom: 1px solid var(--border-color);
}
.breadcrumb-line {
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    margin-bottom: 24px;
    font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
}
.breadcrumb-line a {
    color: var(--text-muted);
    transition: var(--transition-base);
}
.breadcrumb-line a:hover {
    color: var(--brand-accent);
}
.breadcrumb-line .sep {
    margin: 0 10px;
    color: var(--text-placeholder);
}
.breadcrumb-line .current {
    color: var(--text-body);
}
.article-title {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 700;
    color: var(--text-heading);
    margin: 0 0 16px;
    line-height: 1.4;
    letter-spacing: -0.02em;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 0.06em;
}
.article-meta i {
    margin-right: 4px;
    font-size: 0.75rem;
    color: var(--text-placeholder);
}
.meta-tag {
    display: inline-block;
    background: var(--white-05);
    border: 1px solid var(--white-10);
    border-radius: 999px;
    padding: 2px 14px;
    font-size: 0.75rem;
    color: var(--text-body);
    letter-spacing: 0.04em;
}
.article-body {
    padding: 48px 0 64px;
}
.article-content {
    max-width: 72ch;
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-body);
}
.article-content h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-heading);
    margin: 2.25rem 0 1rem;
}
.article-content h4 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-heading);
    margin: 1.75rem 0 0.75rem;
}
.article-content p {
    margin-bottom: 1.25rem;
}
.article-content img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1.5rem 0;
}
.article-content blockquote {
    border-left: 2px solid var(--brand-accent);
    background: var(--bg-elevated);
    padding: 18px 22px;
    margin: 1.5rem 0;
    border-radius: 0 8px 8px 0;
    color: var(--text-body);
}
.article-content a {
    color: var(--text-heading);
    text-decoration: underline;
    text-decoration-color: rgba(var(--brand-accent-rgb), 0.4);
    text-underline-offset: 4px;
    transition: var(--transition-base);
}
.article-content a:hover {
    color: var(--brand-accent);
    text-decoration-color: var(--brand-accent);
}
.article-content table {
    width: 100%;
    margin: 1.5rem 0;
    border-collapse: collapse;
}
.article-content th {
    background: var(--bg-elevated);
    color: var(--text-heading);
    font-weight: 600;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
}
.article-content td {
    padding: 12px 16px;
    border: 1px solid var(--border-color);
}
.article-content tr:hover td {
    background: var(--white-02);
}
.article-content ul,
.article-content ol {
    padding-left: 1.5rem;
    margin-bottom: 1.25rem;
}
.article-content li {
    margin-bottom: 0.5rem;
}
.article-tags {
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
    margin-top: 48px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.article-tags .tag {
    display: inline-block;
    border: 1px solid var(--white-10);
    border-radius: 999px;
    padding: 6px 16px;
    font-size: 0.8rem;
    color: var(--text-body);
    transition: var(--transition-base);
}
.article-tags .tag:hover {
    border-color: rgba(var(--brand-accent-rgb), 0.5);
    color: var(--brand-accent);
}
.article-empty {
    text-align: center;
    padding: 80px 0;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
}
.article-empty p {
    font-size: 1.05rem;
    margin-bottom: 20px;
}
.article-empty a {
    display: inline-block;
    color: var(--brand-accent);
    border: 1px solid rgba(var(--brand-accent-rgb), 0.4);
    border-radius: var(--radius-sm);
    padding: 10px 28px;
    font-size: 0.9rem;
    transition: var(--transition-base);
}
.article-empty a:hover {
    background: var(--brand-accent);
    color: var(--button-text);
    border-color: var(--brand-accent);
}
.article-sidebar {
    padding-left: 2rem;
}
.sidebar-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 24px;
    box-shadow: var(--shadow-card);
}
.sidebar-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-heading);
    letter-spacing: 0.04em;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}
.sidebar-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.sidebar-list li {
    padding: 9px 0;
    border-bottom: 1px solid var(--white-04);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-body);
}
.sidebar-list li:last-child {
    border-bottom: none;
}
.sidebar-list li::before {
    content: '';
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--brand-accent);
    flex-shrink: 0;
}
.sidebar-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.sidebar-tags a {
    display: inline-block;
    border: 1px solid var(--white-10);
    border-radius: 999px;
    padding: 4px 12px;
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: var(--transition-base);
}
.sidebar-tags a:hover {
    border-color: rgba(var(--brand-accent-rgb), 0.5);
    color: var(--brand-accent);
}
.related-section {
    padding: 64px 0;
    border-top: 1px solid var(--border-color);
}
.related-title {
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 24px;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}
.related-card {
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition-base);
    height: 100%;
}
.related-card:hover {
    border-color: rgba(var(--brand-accent-rgb), 0.35);
}
.related-card-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: var(--bg-elevated);
}
.related-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.related-card:hover .related-card-image img {
    transform: scale(1.02);
}
.related-card-body {
    padding: 1.25rem;
}
.related-card-body h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-heading);
    margin: 0 0 8px;
    line-height: 1.5;
    transition: var(--transition-base);
}
.related-card:hover .related-card-body h3 {
    color: var(--brand-accent);
}
.related-card-body p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0 0 12px;
}
.related-card-body .meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.06em;
}
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition-base);
}
.back-link i {
    font-size: 0.8rem;
    transition: transform 0.25s ease;
}
.back-link:hover {
    color: var(--brand-accent);
}
.back-link:hover i {
    transform: translateX(-4px);
}
.site-footer {
    background: #05070C;
    border-top: 1px solid var(--border-color);
    padding: 60px 0 24px;
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 16px;
}
.footer-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 16px;
    max-width: 280px;
}
.footer-contact {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.8;
}
.footer-contact a {
    color: var(--text-body);
    transition: var(--transition-base);
}
.footer-contact a:hover {
    color: var(--brand-accent);
}
.footer-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-heading);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 16px;
}
.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-links li {
    margin-bottom: 10px;
}
.footer-links a {
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: var(--transition-base);
}
.footer-links a:hover {
    color: var(--brand-accent);
}
.footer-bottom {
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.75rem;
    color: var(--text-muted);
}
.btn-brand {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 48px;
    padding: 0 28px;
    background: var(--button-bg);
    color: var(--button-text);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: var(--transition-base);
}
.btn-brand:hover {
    background: var(--button-bg);
    filter: brightness(1.08);
    color: var(--button-text);
    transform: translateY(-1px);
}
input[type="text"],
input[type="email"],
textarea,
select {
    width: 100%;
    height: 48px;
    padding: 0 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    color: var(--text-body);
    font-size: 0.95rem;
    transition: var(--transition-base);
}
textarea {
    height: auto;
    min-height: 120px;
    padding: 12px 16px;
}
input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--brand-accent);
}
input::placeholder,
textarea::placeholder {
    color: var(--text-placeholder);
}
@media (max-width: 991.98px) {
    .article-sidebar {
        padding-left: 0;
        margin-top: 48px;
    }
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 767.98px) {
    .header-cta {
        display: none;
    }
    .header-inner {
        gap: 1rem;
    }
    .nav-toggler {
        display: flex;
    }
    .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        background: rgba(7,10,16,0.98);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        padding: 32px 24px;
        transform: translateY(-12px);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition-base);
        border-bottom: 1px solid var(--border-color);
        z-index: 1029;
    }
    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    .main-nav .nav-link {
        font-size: 1.2rem;
        color: var(--text-body);
        padding: 14px 0;
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }
    .main-nav .nav-link::after {
        display: none;
    }
    .main-nav .nav-link.active,
    .main-nav .nav-link:hover {
        color: var(--text-heading);
    }
    .nav-cta-mobile {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        color: var(--brand-accent);
        font-size: 1rem;
        margin-top: 20px;
        padding-top: 20px;
        border-top: 1px solid var(--border-color);
        width: 100%;
    }
    .nav-cta-mobile i {
        font-size: 0.8rem;
    }
    .article-header {
        padding: 48px 0 32px;
    }
    .article-body {
        padding: 32px 0 48px;
    }
    .article-meta {
        gap: 12px;
    }
    .related-section {
        padding: 48px 0;
    }
    .related-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .site-footer {
        padding-top: 48px;
    }
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
}
@media (max-width: 575.98px) {
    .brand-logo {
        font-size: 1rem;
    }
    .breadcrumb-line {
        font-size: 0.72rem;
    }
    .breadcrumb-line .sep {
        margin: 0 6px;
    }
    .article-title {
        font-size: 1.5rem;
        line-height: 1.35;
    }
    .article-content {
        font-size: 1rem;
        line-height: 1.75;
    }
    .article-content h3 {
        font-size: 1.25rem;
    }
    .sidebar-box {
        padding: 1.25rem;
    }
    .related-card-body {
        padding: 1.1rem;
    }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
    }
}