/* ==================== 设计变量 ==================== */
        :root {
            --primary: #8c6a3f;
            --primary-dark: #6e4f2d;
            --primary-light: #c9ad7a;
            --secondary: #2d2a26;
            --accent: #b9915c;
            --bg-light: #faf7f2;
            --bg-white: #ffffff;
            --bg-dark: #1f1c18;
            --text-main: #2d2a26;
            --text-weak: #6b6359;
            --text-light: #f7f2ea;
            --border: #e5dfd5;
            --border-light: #f0ece4;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-md: 0 10px 30px rgba(0,0,0,0.06);
            --shadow-lg: 0 20px 45px rgba(0,0,0,0.09);
            --transition: all 0.3s ease;
            --container-width: 1180px;
            --section-pad: 72px;
        }

        /* ==================== 基础 Reset ==================== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-light);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button {
            font-family: inherit;
            border: none;
            cursor: pointer;
            background: none;
        }
        ul, ol {
            list-style: none;
        }
        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 72px 0;
        }
        h1, h2, h3, h4 {
            line-height: 1.3;
            font-weight: 700;
            letter-spacing: -0.01em;
        }

        /* ==================== Header / 导航 ==================== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 32px;
        }
        .logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--primary-dark);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            font-size: 24px;
            color: var(--primary);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 36px;
            margin-left: auto;
        }
        .nav-list a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            position: relative;
            padding: 6px 2px;
        }
        .nav-list a:hover,
        .nav-list a.active {
            color: var(--primary);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-ctas {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-primary, .btn-outline {
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(140, 106, 63, 0.25);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .menu-toggle {
            display: none;
            font-size: 24px;
            color: var(--text-main);
            padding: 8px;
        }

        /* ==================== Hero ==================== */
        .hero {
            position: relative;
            background: var(--bg-dark);
            background-image: linear-gradient(rgba(20, 15, 10, 0.75), rgba(20, 15, 10, 0.7)), url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            min-height: 500px;
            display: flex;
            align-items: center;
            color: var(--text-light);
            overflow: hidden;
        }
        .hero-inner {
            display: grid;
            grid-template-columns: 1.3fr 0.9fr;
            gap: 60px;
            align-items: center;
            padding: 80px 0 72px;
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 50px;
            padding: 6px 18px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.03em;
            margin-bottom: 24px;
            backdrop-filter: blur(6px);
        }
        .hero-badge i {
            color: var(--primary-light);
        }
        .hero h1 {
            font-size: 44px;
            line-height: 1.2;
            margin-bottom: 18px;
            font-weight: 800;
            letter-spacing: -0.02em;
        }
        .hero h1 .highlight {
            color: var(--primary-light);
        }
        .hero-desc {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 36px;
            max-width: 620px;
        }
        .hero-ctas {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-ctas .btn-primary {
            background: var(--primary-light);
            color: var(--bg-dark);
        }
        .hero-ctas .btn-primary:hover {
            background: #d9c29a;
            color: var(--bg-dark);
        }
        .hero-ctas .btn-outline {
            border-color: rgba(255, 255, 255, 0.5);
            color: #fff;
        }
        .hero-ctas .btn-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: #fff;
        }
        .hero-stat-row {
            display: flex;
            gap: 32px;
            margin-top: 44px;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-stat .num {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary-light);
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        /* 白皮书卡片 */
        .hero-card {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: 24px;
            padding: 36px;
            backdrop-filter: blur(10px);
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
        }
        .hero-card-label {
            font-size: 13px;
            color: var(--primary-light);
            font-weight: 600;
            letter-spacing: 0.06em;
            margin-bottom: 14px;
        }
        .hero-card h3 {
            font-size: 22px;
            color: #fff;
            margin-bottom: 12px;
        }
        .hero-card ul {
            margin-bottom: 24px;
        }
        .hero-card ul li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            color: rgba(255, 255, 255, 0.72);
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 10px;
        }
        .hero-card ul li i {
            color: var(--primary-light);
            font-size: 14px;
            margin-top: 4px;
        }
        .hero-form {
            display: flex;
            gap: 12px;
        }
        .hero-form input {
            flex: 1;
            padding: 12px 18px;
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 14px;
            outline: none;
        }
        .hero-form input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .hero-form input:focus {
            border-color: var(--primary-light);
            background: rgba(255, 255, 255, 0.15);
        }
        .hero-form .btn-primary {
            background: var(--primary-light);
            color: var(--bg-dark);
            white-space: nowrap;
            padding: 12px 26px;
        }

        /* ==================== 资讯区 ==================== */
        .news-section {
            background: var(--bg-light);
        }
        .news-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr;
            gap: 48px;
            align-items: start;
        }
        .section-title {
            font-size: 30px;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            color: var(--text-main);
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-weak);
            margin-bottom: 40px;
            max-width: 560px;
            line-height: 1.7;
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .news-item {
            padding: 22px 0;
            border-bottom: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
            gap: 6px;
            transition: var(--transition);
        }
        .news-item:first-child {
            padding-top: 0;
        }
        .news-item:hover .news-link {
            color: var(--primary);
        }
        .news-meta {
            font-size: 13px;
            color: var(--primary);
            font-weight: 500;
            letter-spacing: 0.04em;
        }
        .news-link {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            transition: var(--transition);
            line-height: 1.5;
        }
        .news-desc {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-sidebar {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-md);
        }
        .sidebar-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border-light);
            position: relative;
        }
        .sidebar-title::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 48px;
            height: 2px;
            background: var(--primary);
        }
        .sidebar-item {
            display: flex;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px dashed var(--border);
            align-items: flex-start;
        }
        .sidebar-item:last-child {
            border-bottom: none;
        }
        .sidebar-item .rank {
            font-size: 24px;
            font-weight: 800;
            color: var(--border);
            min-width: 36px;
            line-height: 1;
        }
        .sidebar-item:nth-child(5) .rank,
        .sidebar-item:nth-child(6) .rank,
        .sidebar-item:nth-child(7) .rank {
            color: var(--primary-light);
        }
        .sidebar-item-text {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            line-height: 1.4;
            transition: var(--transition);
            cursor: pointer;
        }
        .sidebar-item-text:hover {
            color: var(--primary);
        }
        .sidebar-tag-row {
            margin-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag {
            display: inline-block;
            padding: 6px 16px;
            background: var(--bg-light);
            border: 1px solid var(--border);
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-weak);
            transition: var(--transition);
            cursor: pointer;
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ==================== 服务 / 服务范围 ==================== */
        .services-section {
            background: var(--bg-white);
        }
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .service-card {
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 36px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--primary-light);
            opacity: 0;
            transition: var(--transition);
        }
        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-icon {
            width: 56px;
            height: 56px;
            background: rgba(140, 106, 63, 0.1);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .service-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ==================== 卖点三连 ==================== */
        .feature-section {
            background: var(--bg-dark);
            background-image: linear-gradient(rgba(20, 15, 10, 0.82), rgba(20, 15, 10, 0.82)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            color: var(--text-light);
        }
        .feature-section .section-title {
            color: var(--text-light);
        }
        .feature-section .section-subtitle {
            color: rgba(255, 255, 255, 0.6);
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .feature-card {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 36px;
            text-align: left;
            transition: var(--transition);
        }
        .feature-card:hover {
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-4px);
            border-color: rgba(255, 255, 255, 0.2);
        }
        .feature-card .icon {
            font-size: 36px;
            color: var(--primary-light);
            margin-bottom: 20px;
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
        }

        /* ==================== 使用指南 / App ==================== */
        .guide-section {
            background: var(--bg-light);
        }
        .guide-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .guide-steps {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .guide-step {
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }
        .step-num {
            width: 44px;
            height: 44px;
            min-width: 44px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            box-shadow: 0 8px 20px rgba(140, 106, 63, 0.2);
        }
        .step-content h4 {
            font-size: 18px;
            margin-bottom: 6px;
        }
        .step-content p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
        }
        .guide-media {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .guide-media img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }
        .guide-media-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 32px;
            background: linear-gradient(transparent, rgba(0, 0, 0, 0.75));
            color: #fff;
        }
        .guide-media-overlay h3 {
            font-size: 20px;
            margin-bottom: 6px;
        }
        .guide-media-overlay p {
            font-size: 14px;
            opacity: 0.8;
        }

        /* ==================== FAQ ==================== */
        .faq-section {
            background: var(--bg-white);
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            background: var(--bg-white);
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            padding: 22px 28px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            gap: 20px;
        }
        .faq-question h4 {
            font-size: 17px;
            font-weight: 600;
            flex: 1;
        }
        .faq-question i {
            font-size: 18px;
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 28px 24px;
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ==================== 关于 / 平台保障 ==================== */
        .about-section {
            background: var(--bg-light);
        }
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .about-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .about-media img {
            width: 100%;
            height: 400px;
            object-fit: cover;
        }
        .about-info h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .about-info > p {
            font-size: 16px;
            color: var(--text-weak);
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .about-points {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
        }
        .about-point {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 16px;
            border: 1px solid var(--border-light);
        }
        .about-point i {
            color: var(--primary);
            font-size: 20px;
            margin-top: 2px;
        }
        .about-point span {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            line-height: 1.5;
        }

        /* ==================== CTA ==================== */
        .cta-section {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            color: #fff;
            text-align: center;
            padding: 88px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(45, 35, 20, 0.62);
        }
        .cta-inner {
            position: relative;
            z-index: 2;
        }
        .cta-inner h2 {
            font-size: 38px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-inner p {
            font-size: 17px;
            opacity: 0.85;
            margin-bottom: 36px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .cta-buttons .btn-primary {
            background: #fff;
            color: var(--primary-dark);
        }
        .cta-buttons .btn-primary:hover {
            background: var(--bg-light);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
        }
        .cta-buttons .btn-outline {
            border-color: #fff;
            color: #fff;
        }

        /* ==================== Footer ==================== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.6);
            padding: 56px 0 36px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand .logo i {
            color: var(--primary-light);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            color: #fff;
            margin-bottom: 20px;
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

        /* ==================== 响应式 ==================== */
        @media (max-width: 1024px) {
            :root {
                --section-pad: 60px;
            }
            .hero h1 {
                font-size: 36px;
            }
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 40px;
                padding: 60px 0;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .services-grid,
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guide-wrapper,
            .about-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-pad: 48px;
            }
            .header-inner {
                height: 64px;
            }
            .nav-list {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 24px;
                gap: 20px;
                border-bottom: 1px solid var(--border-light);
                transform: translateY(-120%);
                transition: var(--transition);
                box-shadow: var(--shadow-lg);
            }
            .nav-list.active {
                transform: translateY(0);
            }
            .nav-ctas {
                margin-left: 0;
            }
            .menu-toggle {
                display: block;
            }
            .nav-list .nav-ctas {
                display: none;
            }
            .hero {
                min-height: auto;
            }
            .hero h1 {
                font-size: 30px;
            }
            .hero-card {
                padding: 24px;
            }
            .hero-form {
                flex-direction: column;
            }
            .hero-form .btn-primary {
                width: 100%;
                justify-content: center;
            }
            .hero-stat-row {
                flex-direction: column;
                gap: 16px;
            }
            .services-grid,
            .feature-grid,
            .about-points {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 26px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-inner h2 {
                font-size: 28px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }
            .nav-ctas .btn-outline {
                display: none;
            }
            .hero-ctas {
                flex-direction: column;
            }
            .hero-ctas .btn-primary,
            .hero-ctas .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .news-item {
                padding: 18px 0;
            }
            .news-link {
                font-size: 16px;
            }
            .faq-question {
                padding: 18px 20px;
            }
            .faq-answer {
                padding: 0 20px 20px;
            }
        }