/* roulang page: index */
:root {
            --primary: #0b1d33;
            --primary-light: #142f4f;
            --primary-lighter: #1e4470;
            --accent: #d4a643;
            --accent-light: #e8c06a;
            --accent-dark: #b8892f;
            --bg-body: #f4f6f9;
            --bg-white: #ffffff;
            --bg-soft: #eef1f6;
            --text-dark: #18212e;
            --text-body: #44505f;
            --text-light: #7b8794;
            --border-color: #e3e8ef;
            --shadow-sm: 0 2px 10px rgba(11, 29, 51, 0.06);
            --shadow-md: 0 8px 30px rgba(11, 29, 51, 0.1);
            --shadow-lg: 0 16px 48px rgba(11, 29, 51, 0.16);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --transition: all 0.3s ease;
            --container-width: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

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

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
        }

        .brand-logo {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .brand-logo i {
            color: var(--accent);
            font-size: 1.5rem;
        }

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

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 36px;
            list-style: none;
        }

        .nav-menu li a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            padding: 8px 2px;
            position: relative;
            letter-spacing: 0.02em;
        }

        .nav-menu li a::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
        }

        .nav-menu li a:hover {
            color: var(--primary);
        }

        .nav-menu li a:hover::after,
        .nav-menu li a.active::after {
            width: 100%;
        }

        .nav-menu li a.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            color: #fff;
            font-weight: 600;
            font-size: 0.92rem;
            padding: 10px 22px;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 14px rgba(212, 166, 67, 0.35);
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(212, 166, 67, 0.45);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--primary);
            cursor: pointer;
            padding: 6px;
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 74px;
                left: 0;
                right: 0;
                background: #fff;
                padding: 18px 24px 24px;
                gap: 14px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-cta {
                display: none;
            }
            .header-inner {
                height: 64px;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(11, 29, 51, 0.9) 0%, rgba(20, 47, 79, 0.75) 60%, rgba(30, 68, 112, 0.45) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 80px 24px;
            color: #fff;
            text-align: center;
            overflow: hidden;
        }

        .hero-section::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-body), transparent);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 850px;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.92);
            margin-bottom: 28px;
            letter-spacing: 0.04em;
            backdrop-filter: blur(8px);
        }

        .hero-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: 0.01em;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
        }

        .hero-content p {
            font-size: 1.15rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.88);
            margin-bottom: 36px;
            max-width: 680px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 34px;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 6px 20px rgba(212, 166, 67, 0.4);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(212, 166, 67, 0.5);
            color: #fff;
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-weight: 500;
            font-size: 1rem;
            padding: 12px 34px;
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, 0.45);
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
            backdrop-filter: blur(8px);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.2);
            color: #fff;
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .hero-section {
                min-height: 460px;
                padding: 60px 20px;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .hero-content p {
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.6rem;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 90px 0;
        }

        .section-subtle {
            background: var(--bg-white);
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 56px;
        }

        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent-dark);
            font-size: 0.85rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            margin-bottom: 14px;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .section-header p {
            font-size: 1rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }
            .section-header h2 {
                font-size: 1.55rem;
            }
        }

        /* ===== Trust Stats ===== */
        .stats-section {
            background: var(--primary);
            padding: 40px 0;
            margin-top: -1px;
        }

        .stat-block {
            text-align: center;
            padding: 20px;
            color: #fff;
        }

        .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.75);
            letter-spacing: 0.05em;
        }

        @media (max-width: 768px) {
            .stat-number {
                font-size: 1.8rem;
            }
            .stats-section{
                padding: 24px 0;
            }
        }

        /* ===== Services Cards ===== */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .service-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            transform: scaleX(0);
            transform-origin: left;
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .service-card:hover::before {
            transform: scaleX(1);
        }

        .service-icon {
            width: 60px;
            height: 60px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, rgba(212, 166, 67, 0.15), rgba(212, 166, 67, 0.06));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent-dark);
            margin-bottom: 22px;
        }

        .service-card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .service-card p {
            font-size: 0.93rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        @media (max-width: 1024px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .services-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Guide Steps ===== */
        .guide-section {
            background: linear-gradient(to bottom, var(--bg-white), var(--bg-soft));
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            position: relative;
        }

        .step-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            margin: 0 10px;
            transition: var(--transition);
        }

        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .step-num {
            width: 44px;
            height: 44px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: var(--accent);
            font-weight: 700;
            font-size: 1.1rem;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            box-shadow: 0 4px 12px rgba(11, 29, 51, 0.2);
        }

        .step-item h3 {
            font-size: 1.05rem;
            color: var(--primary);
            margin-bottom: 10px;
            font-weight: 600;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.65;
        }

        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .step-item {
                margin: 0;
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== News List ===== */
        .news-section {
            background: var(--bg-white);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .news-main-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .news-main-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .news-main-card .news-img {
            width: 100%;
            height: 220px;
            overflow: hidden;
        }

        .news-main-card .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .news-main-card:hover .news-img img {
            transform: scale(1.03);
        }

        .news-main-card .news-body {
            padding: 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 12px;
            flex-wrap: wrap;
        }

        .news-category {
            background: rgba(212, 166, 67, 0.15);
            color: var(--accent-dark);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
            letter-spacing: 0.03em;
        }

        .news-date {
            font-size: 0.83rem;
            color: var(--text-light);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .news-date i {
            font-size: 0.75rem;
        }

        .news-main-card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--primary);
            line-height: 1.5;
            margin-bottom: 10px;
        }

        .news-main-card h3 a {
            color: inherit;
        }

        .news-main-card h3 a:hover {
            color: var(--accent-dark);
        }

        .news-main-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary);
            margin-top: 16px;
            transition: var(--transition);
        }

        .read-more:hover {
            color: var(--accent-dark);
            gap: 10px;
        }

        .news-list-side {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .news-list-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 22px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            gap: 20px;
        }

        .news-list-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }

        .news-list-item .list-num {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--border-color);
            line-height: 1;
            min-width: 36px;
        }

        .news-list-item:hover .list-num {
            color: var(--accent);
        }

        .news-list-item h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
            line-height: 1.5;
        }

        .news-list-item h4 a {
            color: inherit;
        }

        .news-list-item h4 a:hover {
            color: var(--accent-dark);
        }

        .news-list-item .list-meta {
            font-size: 0.8rem;
            color: var(--text-light);
            display: flex;
            gap: 12px;
        }

        @media (max-width: 768px) {
            .news-layout {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Feature Split ===== */
        .feature-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .feature-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.18;
        }

        .feature-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .feature-content h2 {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 18px;
            color: #fff;
        }

        .feature-content p {
            font-size: 1.02rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 28px;
        }

        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0 0 32px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 14px;
            font-size: 0.98rem;
            color: rgba(255, 255, 255, 0.92);
        }

        .feature-list li i {
            color: var(--accent);
            margin-top: 4px;
        }

        .feature-visual {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .feature-visual .visual-card {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: var(--radius-md);
            padding: 26px 22px;
            text-align: center;
            backdrop-filter: blur(5px);
            transition: var(--transition);
        }

        .feature-visual .visual-card:hover {
            background: rgba(255, 255, 255, 0.18);
            transform: translateY(-4px);
        }

        .feature-visual .visual-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 14px;
        }

        .feature-visual .visual-card h4 {
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 8px;
        }

        .feature-visual .visual-card p {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .feature-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 520px) {
            .feature-visual {
                grid-template-columns: 1fr;
            }
            .feature-content h2 {
                font-size: 1.6rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-soft);
        }

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

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            padding: 22px 28px;
            font-size: 1.02rem;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }

        .faq-question .faq-icon {
            color: var(--accent);
            font-size: 0.9rem;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

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

        .faq-item.active .faq-answer {
            max-height: 600px;
        }

        .faq-answer p {
            padding: 0 28px 22px;
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.8;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 18px 20px;
                font-size: 0.95rem;
            }
            .faq-answer p {
                padding: 0 20px 18px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            padding: 80px 0;
            text-align: center;
            color: #fff;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.15;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: #fff;
        }

        .cta-content p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
            line-height: 1.7;
        }

        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 60px 0;
            }
            .cta-content h2 {
                font-size: 1.6rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #081322;
            color: rgba(255, 255, 255, 0.65);
            padding: 60px 0 24px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand i {
            color: var(--accent);
            margin-right: 8px;
        }

        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 1rem;
            color: #fff;
            margin-bottom: 16px;
            font-weight: 600;
        }

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

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

        .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        @media (max-width: 768px) {
            .footer-top {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }

        /* ===== Mobile menu button ===== */
        .nav-toggle:focus {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 6px;
        }

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 6px;
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --navy-950: #081c30;
            --navy-900: #0b2b47;
            --navy-800: #103a5e;
            --navy-700: #154a73;
            --gold-600: #c28a2d;
            --gold-500: #d9a441;
            --gold-400: #e4b865;
            --gold-300: #f0ce8a;
            --teal-500: #1e8e6e;
            --bg-soft: #f1f4f8;
            --bg-white: #ffffff;
            --text-title: #12233a;
            --text-body: #3d5066;
            --text-muted: #6b7f94;
            --border-soft: rgba(11, 43, 71, 0.1);
            --border-medium: rgba(11, 43, 71, 0.18);
            --radius-xl: 26px;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 10px rgba(8, 28, 48, 0.07);
            --shadow-md: 0 10px 30px rgba(8, 28, 48, 0.11);
            --shadow-lg: 0 20px 50px rgba(8, 28, 48, 0.16);
            --space-section: 92px;
            --space-section-md: 68px;
            --transition-fast: all 0.2s ease;
            --transition: all 0.3s ease;
            --transition-slow: all 0.55s ease;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
            background: var(--bg-white);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

        a:hover {
            text-decoration: none;
        }

        ul,
        ol {
            list-style: none;
        }

        button,
        input {
            font-family: inherit;
            border: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        /* ===== 通用容器 ===== */
        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--space-section) 0;
        }

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

        .section-title {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-title);
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 680px;
            line-height: 1.7;
        }

        .section-head {
            margin-bottom: 48px;
        }

        .section-head-center {
            text-align: center;
        }

        .section-head-center .section-subtitle {
            margin: 0 auto;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(217, 164, 65, 0.12);
            color: var(--gold-600);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 100px;
            letter-spacing: 0.04em;
            margin-bottom: 16px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 999;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-soft);
            box-shadow: 0 1px 12px rgba(8, 28, 48, 0.06);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 72px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 19px;
            font-weight: 800;
            color: var(--navy-900);
            letter-spacing: -0.01em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .brand-logo i {
            font-size: 24px;
            color: var(--gold-500);
            background: linear-gradient(135deg, rgba(217, 164, 65, 0.2), rgba(217, 164, 65, 0.05));
            border-radius: 12px;
            padding: 8px;
            width: 44px;
            height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex: 1;
            justify-content: center;
        }

        .nav-menu a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: 100px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
            position: relative;
        }

        .nav-menu a:hover {
            color: var(--navy-800);
            background: rgba(11, 43, 71, 0.05);
            transform: translateY(-1px);
        }

        .nav-menu a.active {
            color: var(--navy-900);
            background: rgba(217, 164, 65, 0.14);
            font-weight: 600;
        }

        .nav-menu a.active::after {
            content: "";
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--gold-500);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 100px;
            font-size: 14px;
            font-weight: 600;
            background: var(--navy-900);
            color: #fff;
            box-shadow: 0 4px 16px rgba(11, 43, 71, 0.25);
            transition: var(--transition);
            flex-shrink: 0;
            border: 1px solid transparent;
        }

        .nav-cta:hover {
            background: var(--navy-800);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(11, 43, 71, 0.3);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            border: 1px solid var(--border-soft);
            background: var(--bg-white);
            color: var(--navy-900);
            font-size: 20px;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: var(--bg-soft);
        }

        /* ===== 页面横幅 ===== */
        .page-hero {
            position: relative;
            min-height: 480px;
            display: flex;
            align-items: center;
            padding: 140px 0 80px;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            isolation: isolate;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(8, 28, 48, 0.9) 0%, rgba(11, 43, 71, 0.75) 50%, rgba(11, 43, 71, 0.35) 100%);
            z-index: -1;
        }

        .page-hero-inner {
            max-width: 760px;
            color: #fff;
            animation: fadeUp 0.8s ease both;
        }

        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 24px;
            letter-spacing: 0.02em;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--gold-300);
        }

        .breadcrumb span {
            color: rgba(255, 255, 255, 0.5);
        }

        .page-hero h1 {
            font-size: 52px;
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }

        .page-hero p {
            font-size: 18px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.88);
            max-width: 620px;
            margin-bottom: 32px;
        }

        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: 100px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            transition: var(--transition);
            border: 2px solid transparent;
            cursor: pointer;
            text-align: center;
            justify-content: center;
        }

        .btn-gold {
            background: var(--gold-500);
            color: var(--navy-950);
            box-shadow: 0 6px 20px rgba(217, 164, 65, 0.3);
        }

        .btn-gold:hover {
            background: var(--gold-400);
            color: var(--navy-950);
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(217, 164, 65, 0.4);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.55);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-3px);
        }

        /* ===== 简介区 ===== */
        .intro-wrap {
            display: flex;
            gap: 56px;
            align-items: center;
            flex-wrap: wrap;
        }

        .intro-text {
            flex: 1.2;
            min-width: 300px;
        }

        .intro-text p {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-body);
            margin-bottom: 18px;
        }

        .intro-stats {
            flex: 0.8;
            min-width: 280px;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .stat-card {
            background: var(--bg-white);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 24px 16px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

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

        .stat-number {
            font-size: 30px;
            font-weight: 800;
            color: var(--navy-800);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ===== 登录步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-card {
            background: var(--bg-white);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-lg);
            padding: 34px 26px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .step-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--gold-500);
            opacity: 0;
            transition: var(--transition);
        }

        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(217, 164, 65, 0.3);
        }

        .step-card:hover::before {
            opacity: 1;
        }

        .step-num {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--navy-900);
            color: var(--gold-300);
            font-size: 18px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            box-shadow: 0 6px 16px rgba(11, 43, 71, 0.2);
        }

        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .step-card p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-muted);
        }

        /* ===== 设备登录方式 ===== */
        .device-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .device-card {
            background: var(--bg-white);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .device-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(217, 164, 65, 0.25);
        }

        .device-cover {
            position: relative;
            overflow: hidden;
            height: 200px;
        }

        .device-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .device-card:hover .device-cover img {
            transform: scale(1.05);
        }

        .device-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(8, 28, 48, 0.3));
        }

        .device-body {
            padding: 26px 26px 30px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .device-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(217, 164, 65, 0.12);
            color: var(--gold-600);
            font-size: 12px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 100px;
            margin-bottom: 14px;
            width: fit-content;
        }

        .device-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 10px;
        }

        .device-body p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-muted);
            flex: 1;
            margin-bottom: 18px;
        }

        .device-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--navy-800);
            transition: var(--transition);
        }

        .device-link i {
            transition: transform 0.3s;
        }

        .device-link:hover {
            color: var(--gold-600);
        }

        .device-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 安全提示 ===== */
        .security-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: #fff;
            isolation: isolate;
        }

        .security-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(8, 28, 48, 0.93) 0%, rgba(11, 43, 71, 0.85) 100%);
            z-index: -1;
        }

        .security-inner {
            display: flex;
            gap: 56px;
            flex-wrap: wrap;
            align-items: center;
        }

        .security-content {
            flex: 1;
            min-width: 300px;
        }

        .security-content .section-title {
            color: #fff;
        }

        .security-content .section-subtitle {
            color: rgba(255, 255, 255, 0.75);
        }

        .security-list {
            flex: 1;
            min-width: 320px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .security-item {
            display: flex;
            gap: 16px;
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }

        .security-item:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.25);
            transform: translateX(6px);
        }

        .security-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: rgba(217, 164, 65, 0.2);
            color: var(--gold-300);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        .security-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
        }

        .security-item p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.75);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
            box-shadow: 0 1px 4px rgba(8, 28, 48, 0.04);
        }

        .faq-item.active {
            border-color: rgba(217, 164, 65, 0.35);
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 26px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-title);
            background: transparent;
            cursor: pointer;
            transition: var(--transition);
            text-align: left;
            gap: 20px;
        }

        .faq-question:hover {
            color: var(--navy-800);
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(217, 164, 65, 0.15);
            color: var(--gold-600);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            flex-shrink: 0;
            transition: all 0.4s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--gold-500);
            color: #fff;
        }

        .faq-answer {
            display: none;
            padding: 0 26px 24px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-body);
            border-top: 1px dashed var(--border-soft);
            margin-top: 0;
            padding-top: 16px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--navy-900);
            color: #fff;
            text-align: center;
            padding: 90px 0;
            background-image: linear-gradient(135deg, rgba(217, 164, 65, 0.18), transparent 60%), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(8, 28, 48, 0.55);
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: 38px;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            line-height: 1.25;
        }

        .cta-inner p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 32px;
            line-height: 1.7;
        }

        .cta-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0a1f33;
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 0;
            border-top: 4px solid var(--gold-500);
        }

        .footer-top {
            display: flex;
            gap: 48px;
            flex-wrap: wrap;
            padding-bottom: 44px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-top>div:first-child {
            flex: 1.4;
            min-width: 260px;
        }

        .footer-top>div:not(:first-child) {
            flex: 0.7;
            min-width: 150px;
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }

        .footer-brand i {
            color: var(--gold-500);
            font-size: 24px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 380px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h4::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2px;
            background: var(--gold-500);
            border-radius: 2px;
        }

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

        .footer-col ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul a:hover {
            color: var(--gold-300);
            padding-left: 4px;
        }

        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: 0;
        }

        .footer-bottom p {
            margin-bottom: 0;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .device-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .page-hero h1 {
                font-size: 42px;
            }

            .section {
                padding: var(--space-section-md) 0;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                height: 64px;
            }

            .header-inner {
                height: 64px;
            }

            .nav-menu {
                position: fixed;
                top: 64px;
                left: 0;
                width: 100%;
                background: #fff;
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                box-shadow: 0 12px 30px rgba(8, 28, 48, 0.12);
                transform: translateY(-120%);
                transition: transform 0.4s ease;
                border-bottom: 1px solid var(--border-soft);
                border-radius: 0 0 20px 20px;
                z-index: 998;
            }

            .nav-menu.open {
                transform: translateY(0);
            }

            .nav-menu a {
                width: 100%;
                justify-content: flex-start;
                padding: 14px 20px;
                border-radius: 10px;
            }

            .nav-cta {
                display: none;
            }

            .nav-toggle {
                display: inline-flex;
                margin-left: auto;
            }

            .brand-logo span {
                font-size: 16px;
            }

            .brand-logo i {
                width: 38px;
                height: 38px;
                font-size: 20px;
            }

            .page-hero {
                min-height: 420px;
                padding: 120px 0 64px;
            }

            .page-hero h1 {
                font-size: 34px;
            }

            .page-hero p {
                font-size: 16px;
            }

            .hero-btns {
                flex-direction: column;
                align-items: flex-start;
            }

            .hero-btns .btn {
                width: 100%;
            }

            .intro-wrap {
                gap: 32px;
            }

            .intro-stats {
                width: 100%;
                min-width: 0;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .device-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .section-title {
                font-size: 28px;
            }

            .security-inner {
                gap: 32px;
            }

            .security-list {
                min-width: 0;
            }

            .cta-section {
                padding: 64px 0;
            }

            .cta-inner h2 {
                font-size: 28px;
            }

            .footer-top {
                gap: 32px;
                flex-direction: column;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }

            .page-hero h1 {
                font-size: 28px;
            }

            .intro-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 10px;
            }

            .stat-card {
                padding: 18px 10px;
            }

            .stat-number {
                font-size: 22px;
            }

            .stat-label {
                font-size: 12px;
            }

            .step-card {
                padding: 24px 20px;
            }

            .device-body {
                padding: 20px;
            }

            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 0 18px 18px;
                font-size: 14px;
            }
        }

        /* ===== 焦点可访问性 ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(217, 164, 65, 0.5);
            outline-offset: 2px;
        }

/* roulang page: article */
/* ========== 设计变量 ========== */
        :root {
            --primary: #0d1c29;
            --primary-light: #1b3548;
            --primary-deep: #070f16;
            --accent: #d4a94a;
            --accent-light: #e6c87c;
            --accent-dark: #b68a35;
            --bg: #f5f2ec;
            --bg-dark: #0b1925;
            --text: #26313b;
            --text-light: #70808c;
            --border: #e3dcd2;
            --white: #ffffff;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-lg: 0 24px 60px rgba(13, 28, 41, .12);
            --shadow-md: 0 10px 30px rgba(13, 28, 41, .08);
            --shadow-sm: 0 4px 14px rgba(13, 28, 41, .06);
            --transition: all .32s cubic-bezier(.25, .74, .22, .99);
            --container: 1260px;
        }

        /* ========== Reset / 基础 ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: inline-block;
        }
        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        button,
        input {
            font-family: inherit;
        }
        ::selection {
            background: var(--accent);
            color: var(--primary);
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== 通用区块 ========== */
        .section {
            padding: 90px 0;
        }
        .section-head {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: .8rem;
            font-weight: 700;
            letter-spacing: 3px;
            color: var(--accent-dark);
            text-transform: uppercase;
            background: rgba(212, 169, 74, .1);
            border: 1px solid rgba(212, 169, 74, .3);
            padding: 6px 20px;
            border-radius: 999px;
            margin-bottom: 16px;
        }
        .section-head h2 {
            font-family: Georgia, "Noto Serif SC", "PingFang SC", serif;
            font-size: clamp(1.8rem, 3.4vw, 2.6rem);
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
        }
        .section-head p {
            color: var(--text-light);
            margin-top: 12px;
            font-size: 1rem;
            max-width: 660px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== 顶部导航 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(7, 15, 22, .9);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, .07);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(7, 15, 22, .97);
            box-shadow: 0 8px 30px rgba(0, 0, 0, .3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 24px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 700;
            font-size: 1.08rem;
            color: #fff;
            white-space: nowrap;
            letter-spacing: .5px;
        }
        .brand-logo i {
            font-size: 1.5rem;
            color: var(--accent);
            background: rgba(212, 169, 74, .15);
            width: 42px;
            height: 42px;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .brand-logo span {
            background: linear-gradient(90deg, #fff, #f0e2c0);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-menu a {
            color: rgba(255, 255, 255, .72);
            font-size: .94rem;
            font-weight: 500;
            padding: 9px 20px;
            border-radius: 999px;
            transition: var(--transition);
        }
        .nav-menu a:hover {
            color: #fff;
            background: rgba(255, 255, 255, .08);
        }
        .nav-menu a.active {
            color: var(--primary);
            background: var(--accent);
            font-weight: 600;
            box-shadow: 0 4px 18px rgba(212, 169, 74, .35);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            font-size: .9rem;
            padding: 11px 24px;
            border-radius: 999px;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(212, 169, 74, .3);
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(212, 169, 74, .42);
        }
        .nav-toggle {
            display: none;
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .15);
            border-radius: 10px;
            color: #fff;
            font-size: 1.2rem;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, .15);
        }

        /* ========== 文章 Hero ========== */
        .article-hero {
            position: relative;
            padding: 170px 0 90px;
            color: #fff;
            background-image: linear-gradient(135deg, rgba(5, 12, 19, .92) 0%, rgba(10, 25, 37, .78) 50%, rgba(22, 44, 60, .65) 100%),
                url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 20% 20%, rgba(212, 169, 74, .12), transparent 45%);
            pointer-events: none;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: .88rem;
            color: rgba(255, 255, 255, .6);
            margin-bottom: 32px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, .75);
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb i {
            font-size: .6rem;
            opacity: .6;
        }
        .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: .82rem;
            font-weight: 700;
            letter-spacing: 4px;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 20px;
            border-left: 3px solid var(--accent);
            padding-left: 14px;
        }
        .article-hero h1 {
            font-family: Georgia, "Noto Serif SC", "PingFang SC", serif;
            font-size: clamp(1.9rem, 4vw, 3rem);
            font-weight: 700;
            line-height: 1.25;
            max-width: 840px;
            margin-bottom: 24px;
            text-shadow: 0 4px 30px rgba(0, 0, 0, .3);
        }
        .article-hero-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: .92rem;
            color: rgba(255, 255, 255, .68);
        }
        .article-hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }
        .article-hero-meta i {
            color: var(--accent);
        }

        /* ========== 文章主体 ========== */
        .article-layout {
            padding-top: 70px;
        }
        .article-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 52px 46px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
            margin-bottom: 40px;
        }
        .article-content {
            font-size: 1.06rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-content h2 {
            font-family: Georgia, "Noto Serif SC", serif;
            font-size: 1.6rem;
            margin: 36px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border);
            color: var(--primary);
        }
        .article-content h3 {
            font-size: 1.28rem;
            margin: 28px 0 12px;
            color: var(--primary);
            font-weight: 700;
        }
        .article-content h4 {
            font-size: 1.1rem;
            margin: 22px 0 10px;
            color: var(--primary);
            font-weight: 600;
        }
        .article-content p {
            margin-bottom: 1.25em;
        }
        .article-content a {
            color: var(--accent-dark);
            text-decoration: underline;
            text-underline-offset: 4px;
        }
        .article-content a:hover {
            color: var(--primary);
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 1.3em;
            padding-left: 1.4em;
        }
        .article-content ul {
            list-style: disc;
        }
        .article-content ol {
            list-style: decimal;
        }
        .article-content li {
            margin-bottom: .5em;
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: rgba(212, 169, 74, .07);
            padding: 18px 24px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--primary);
            font-style: italic;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 1.2em 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.4em 0;
            font-size: .95rem;
        }
        .article-content table th {
            background: var(--primary);
            color: #fff;
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }
        .article-content table td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border);
        }
        .article-content table tr:hover td {
            background: rgba(13, 28, 41, .02);
        }
        .article-content hr {
            border: 0;
            height: 1px;
            background: var(--border);
            margin: 2em 0;
        }
        .article-content code {
            background: rgba(13, 28, 41, .06);
            padding: 2px 8px;
            border-radius: 5px;
            font-size: .9em;
        }
        .article-content pre {
            background: var(--primary-deep);
            color: #f0e2c0;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 1.4em 0;
        }
        .article-content pre code {
            background: none;
            color: inherit;
            padding: 0;
        }

        /* 内容未找到 */
        .not-found {
            text-align: center;
            padding: 70px 30px;
        }
        .not-found .nf-icon {
            font-size: 4rem;
            color: var(--accent);
            margin-bottom: 24px;
        }
        .not-found h2 {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 14px;
        }
        .not-found p {
            color: var(--text-light);
            margin-bottom: 30px;
        }
        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border-radius: 999px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-back:hover {
            background: var(--accent);
            color: var(--primary);
            transform: translateY(-2px);
        }

        /* ========== 侧边栏 ========== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 26px;
        }
        .sidebar-widget {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .widget-title {
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border);
        }
        .widget-title i {
            color: var(--accent);
        }
        .widget-title::after {
            content: '';
            flex: 1;
            height: 2px;
            background: linear-gradient(90deg, rgba(212, 169, 74, .3), transparent);
        }
        .about-widget p {
            font-size: .93rem;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .sidebar-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: .88rem;
            font-weight: 600;
            color: var(--accent-dark);
            transition: var(--transition);
        }
        .sidebar-link:hover {
            gap: 12px;
            color: var(--primary);
        }
        .process-steps {
            counter-reset: step;
        }
        .process-steps li {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 0;
            border-bottom: 1px dashed var(--border);
            font-size: .92rem;
            color: var(--text);
        }
        .process-steps li:last-child {
            border-bottom: 0;
        }
        .process-steps li span {
            width: 32px;
            height: 32px;
            border-radius: 10px;
            background: rgba(212, 169, 74, .12);
            color: var(--accent-dark);
            font-weight: 700;
            font-size: .9rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .links-widget ul li {
            margin-bottom: 8px;
        }
        .links-widget ul a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: .92rem;
            color: var(--text);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .links-widget ul a:hover {
            background: rgba(212, 169, 74, .08);
            color: var(--accent-dark);
            padding-left: 18px;
        }
        .links-widget ul a i {
            font-size: .7rem;
            color: var(--accent);
        }
        .widget-badge {
            display: inline-block;
            background: rgba(212, 169, 74, .12);
            color: var(--accent-dark);
            font-size: .75rem;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 999px;
            margin-top: 14px;
        }

        /* ========== 相关推荐 ========== */
        .related-section {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .related-grid .cell {
            margin-bottom: 24px;
        }
        .related-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg);
            border: 1px solid var(--border);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(212, 169, 74, .35);
        }
        .related-card-img {
            position: relative;
            height: 190px;
            overflow: hidden;
        }
        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .related-card:hover .related-card-img img {
            transform: scale(1.06);
        }
        .related-card-img::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60%;
            background: linear-gradient(transparent, rgba(7, 15, 22, .5));
        }
        .related-card-body {
            padding: 22px 24px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card-body h3 {
            font-size: 1.12rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
            line-height: 1.45;
        }
        .related-card-body p {
            font-size: .9rem;
            color: var(--text-light);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .related-card-link {
            font-size: .88rem;
            font-weight: 600;
            color: var(--accent-dark);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .related-card-link:hover {
            gap: 12px;
            color: var(--primary);
        }

        /* ========== 信息条 ========== */
        .info-strip {
            background: var(--bg-dark);
            padding: 38px 0;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .info-strip::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 80% 20%, rgba(212, 169, 74, .1), transparent 40%);
        }
        .info-strip .container {
            position: relative;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
        }
        .info-item {
            text-align: center;
            padding: 10px;
        }
        .info-item i {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 10px;
        }
        .info-item .num {
            font-size: 1.5rem;
            font-weight: 700;
            letter-spacing: 1px;
        }
        .info-item .label {
            font-size: .85rem;
            color: rgba(255, 255, 255, .65);
            margin-top: 4px;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 90px 0;
            background: var(--bg);
        }
        .cta-banner {
            border-radius: 30px;
            padding: 60px 50px;
            background-image: linear-gradient(100deg, rgba(5, 12, 19, .94), rgba(13, 28, 41, .8)), url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 36px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .cta-banner::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            border: 1px solid rgba(212, 169, 74, .3);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 12px;
            font-family: Georgia, "Noto Serif SC", serif;
        }
        .cta-text p {
            color: rgba(255, 255, 255, .7);
            max-width: 480px;
            font-size: .96rem;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            font-size: 1rem;
            padding: 15px 36px;
            border-radius: 999px;
            transition: var(--transition);
            box-shadow: 0 6px 24px rgba(212, 169, 74, .35);
            white-space: nowrap;
        }
        .cta-btn:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 12px 34px rgba(212, 169, 74, .45);
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: #fff;
        }
        .faq-section .section-head {
            margin-bottom: 40px;
        }
        .accordion {
            max-width: 900px;
            margin: 0 auto;
        }
        .accordion-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }
        .accordion-item:hover {
            border-color: rgba(212, 169, 74, .4);
        }
        .accordion-title {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 26px;
            font-size: 1.02rem;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            background: transparent;
            border: 0;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .accordion-title i {
            color: var(--accent);
            font-size: 1.1rem;
            transition: transform .3s ease;
        }
        .accordion-item.is-active .accordion-title {
            color: var(--accent-dark);
        }
        .accordion-item.is-active .accordion-title i {
            transform: rotate(180deg);
        }
        .accordion-content {
            padding: 0 26px 22px 54px;
            color: var(--text-light);
            font-size: .94rem;
            line-height: 1.85;
            display: none;
        }
        .accordion-item.is-active .accordion-content {
            display: block;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, .7);
            padding-top: 64px;
            position: relative;
        }
        .site-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(212, 169, 74, .4), transparent);
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-brand {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand i {
            color: var(--accent);
        }
        .footer-desc {
            font-size: .92rem;
            color: rgba(255, 255, 255, .55);
            line-height: 1.8;
            max-width: 420px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: .95rem;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 2px;
            text-transform: uppercase;
        }
        .footer-col ul li {
            margin-bottom: 12px;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, .55);
            font-size: .92rem;
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--accent);
            padding-left: 6px;
        }
        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: .85rem;
            color: rgba(255, 255, 255, .4);
        }

        /* ========== 响应式断点 ========== */
        @media screen and (max-width: 1024px) {
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
            .article-hero h1 {
                font-size: 2.3rem;
            }
            .cta-banner {
                padding: 48px 36px;
            }
        }

        @media screen and (max-width: 768px) {
            .section {
                padding: 64px 0;
            }
            .header-inner {
                height: 68px;
            }
            .nav-toggle {
                display: inline-flex;
                order: 3;
            }
            .nav-menu {
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(7, 15, 22, .98);
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 16px 20px 24px;
                border-bottom: 1px solid rgba(255, 255, 255, .08);
                transform: translateY(-12px);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                backdrop-filter: blur(20px);
                box-shadow: 0 20px 40px rgba(0, 0, 0, .3);
            }
            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-menu a {
                padding: 14px 20px;
                font-size: 1rem;
                border-radius: 12px;
            }
            .nav-cta {
                display: none;
            }
            .article-hero {
                padding: 130px 0 60px;
            }
            .article-hero h1 {
                font-size: 1.9rem;
            }
            .article-card {
                padding: 32px 24px;
                border-radius: var(--radius-md);
            }
            .info-strip .container {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .cta-banner {
                flex-direction: column;
                align-items: flex-start;
                padding: 40px 28px;
            }
            .cta-btn {
                width: 100%;
                justify-content: center;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 36px;
            }
        }

        @media screen and (max-width: 520px) {
            .container {
                padding: 0 18px;
            }
            .brand-logo {
                font-size: .92rem;
            }
            .brand-logo i {
                width: 34px;
                height: 34px;
                font-size: 1.15rem;
            }
            .section-head h2 {
                font-size: 1.6rem;
            }
            .article-hero h1 {
                font-size: 1.6rem;
            }
            .article-hero-meta {
                gap: 12px;
                font-size: .82rem;
            }
            .article-card {
                padding: 26px 18px;
            }
            .article-content {
                font-size: 1rem;
            }
            .related-card-img {
                height: 160px;
            }
            .info-strip .container {
                grid-template-columns: 1fr;
            }
            .accordion-title {
                padding: 16px 16px;
                font-size: .95rem;
            }
            .accordion-content {
                padding: 0 16px 18px 20px;
                font-size: .9rem;
            }
            .footer-top {
                gap: 28px;
            }
        }

        /* 打印与 accessibility */
        @media (prefers-reduced-motion: reduce) {
            * {
                transition-duration: .01ms !important;
                animation-duration: .01ms !important;
            }
        }
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(212, 169, 74, .6);
            outline-offset: 2px;
        }