/* roulang page: index */
/* ============================================
           设计变量与基础重置
        ============================================ */
        :root {
            --primary: #0F766E;
            --primary-dark: #134E4A;
            --primary-light: #CCFBF1;
            --accent: #D97706;
            --accent-hover: #F59E0B;
            --bg-warm: #F8F6F3;
            --white: #FFFFFF;
            --dark: #0F172A;
            --dark-deep: #0B1120;
            --text-main: #111827;
            --text-secondary: #4B5563;
            --text-muted: #9CA3AF;
            --text-invert: #F8FAFC;
            --border-light: rgba(15, 23, 42, 0.08);
            --radius-sm: 10px;
            --radius-md: 14px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.05);
            --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.10);
            --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg-warm);
            color: var(--text-main);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: all 0.25s ease;
        }

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

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

        .container {
            max-width: 1260px;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 575px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

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

        .text-muted-2 {
            color: var(--text-muted) !important;
        }

        .btn:focus,
        .btn-cta:focus,
        a:focus,
        button:focus,
        input:focus,
        textarea:focus,
        select:focus,
        .accordion-button:focus {
            outline: 2px solid var(--primary) !important;
            outline-offset: 3px;
            box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.15) !important;
        }

        /* ============================================
           导航
        ============================================ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--dark) 100%);
            padding: 0;
            box-shadow: 0 2px 8px rgba(15, 23, 42, 0.25);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            background: rgba(15, 23, 42, 0.92);
            backdrop-filter: blur(10px);
            box-shadow: 0 4px 16px rgba(15, 23, 42, 0.35);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            flex-wrap: wrap;
        }

        .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            margin: 0;
        }

        .brand-mark {
            width: 38px;
            height: 38px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.25);
            flex-shrink: 0;
        }

        .brand-mark i {
            color: var(--accent);
            font-size: 18px;
        }

        .brand-text {
            color: var(--text-invert);
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .site-nav {
            display: flex;
            align-items: center;
            gap: 32px;
            margin: 0 auto;
            padding: 0;
            list-style: none;
        }

        .site-nav li a {
            color: rgba(248, 250, 252, 0.8);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 4px;
            position: relative;
            transition: color 0.25s ease;
        }

        .site-nav li a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width 0.3s ease;
        }

        .site-nav li a:hover {
            color: var(--white);
        }

        .site-nav li a:hover::after {
            width: 100%;
        }

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

        .site-nav li a.active::after {
            width: 100%;
        }

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

        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.12);
            color: var(--text-invert);
            font-size: 13px;
            font-weight: 500;
            padding: 5px 12px;
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.12);
        }

        .status-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #10B981;
            display: inline-block;
        }

        .countdown-box {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.12);
            padding: 5px 10px;
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .countdown-label {
            font-size: 12px;
            color: rgba(248, 250, 252, 0.7);
        }

        .countdown-timer {
            font-variant-numeric: tabular-nums;
            font-weight: 700;
            color: var(--white);
            font-size: 15px;
            letter-spacing: 1px;
            background: rgba(255, 255, 255, 0.1);
            padding: 2px 8px;
            border-radius: 6px;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #1A1A1A !important;
            font-size: 15px;
            font-weight: 700;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            border: none;
            transition: all 0.25s ease;
            box-shadow: 0 4px 14px rgba(217, 119, 6, 0.3);
            min-height: 44px;
        }

        .btn-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(217, 119, 6, 0.4);
        }

        .btn-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(217, 119, 6, 0.3);
        }

        /* 移动端导航 */
        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: transparent;
            padding: 8px 10px;
            border-radius: 8px;
        }

        .navbar-toggler i {
            color: var(--white);
            font-size: 18px;
        }

        @media (max-width: 991px) {
            .header-inner {
                min-height: 60px;
            }
            .site-header .collapse {
                background: var(--dark);
                padding: 16px 20px;
                border-radius: 0 0 12px 12px;
            }
            .site-nav {
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                width: 100%;
                margin: 10px 0;
                padding: 0;
            }
            .site-nav li {
                width: 100%;
            }
            .site-nav li a {
                display: block;
                padding: 14px 8px;
                font-size: 16px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
            .site-nav li a::after {
                display: none;
            }
            .header-actions {
                width: 100%;
                flex-wrap: wrap;
                justify-content: space-between;
                padding-top: 14px;
                border-top: 1px solid rgba(255, 255, 255, 0.06);
            }
            .header-actions .btn-cta {
                order: 4;
                width: 100%;
                justify-content: center;
            }
            .brand-text {
                font-size: 17px;
            }
        }

        /* ============================================
           Hero 区块
        ============================================ */
        .hero-section {
            position: relative;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 45%, var(--dark) 100%);
            padding: 88px 0 96px;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 100%;
            height: 100%;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 80px;
            background: linear-gradient(to top right, var(--bg-warm) 0%, var(--bg-warm) 48%, transparent 50%);
            z-index: 1;
        }

        .hero-section .container {
            position: relative;
            z-index: 2;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 56px;
            align-items: center;
        }

        .hero-content {
            color: var(--text-invert);
        }

        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: var(--text-invert);
            font-size: 13px;
            padding: 4px 14px;
            border-radius: 30px;
            margin-bottom: 20px;
            letter-spacing: 0.3px;
        }

        .hero-content h1 {
            font-size: clamp(32px, 5vw, 50px);
            font-weight: 800;
            color: var(--white);
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .hero-content h1 .highlight {
            color: var(--accent-hover);
        }

        .hero-subtitle {
            font-size: 18px;
            color: rgba(248, 250, 252, 0.85);
            margin-bottom: 32px;
            line-height: 1.7;
            max-width: 480px;
        }

        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 20px;
        }

        .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #1A1A1A !important;
            font-size: 16px;
            font-weight: 700;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            box-shadow: 0 4px 14px rgba(217, 119, 6, 0.35);
            min-height: 50px;
            border: none;
        }

        .btn-download:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(217, 119, 6, 0.4);
        }

        .btn-secondary-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--text-invert);
            font-size: 16px;
            font-weight: 600;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            transition: all 0.25s ease;
            min-height: 50px;
        }

        .btn-secondary-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--white);
            color: var(--white);
        }

        .platform-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 18px;
            font-size: 13px;
            color: rgba(248, 250, 252, 0.7);
        }

        .platform-tags span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .platform-tags i {
            color: var(--accent-hover);
            font-size: 14px;
        }

        .trust-row {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 28px;
            padding-top: 22px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }

        .trust-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: rgba(248, 250, 252, 0.8);
            background: rgba(255, 255, 255, 0.06);
            padding: 4px 12px;
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .trust-item i {
            color: #10B981;
            font-size: 12px;
        }

        .hero-visual {
            position: relative;
        }

        .hero-visual .mock-window {
            background: rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            padding: 12px;
            border: 1px solid rgba(255, 255, 255, 0.18);
            box-shadow: 0 20px 50px rgba(15, 23, 42, 0.35);
            backdrop-filter: blur(8px);
        }

        .hero-visual .mock-window img {
            border-radius: 12px;
            width: 100%;
            object-fit: cover;
        }

        .hero-visual .mock-float {
            position: absolute;
            bottom: -24px;
            left: -20px;
            background: var(--white);
            border-radius: 12px;
            padding: 14px 18px;
            box-shadow: 0 8px 24px rgba(15, 23, 42, 0.18);
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .hero-visual .mock-float i {
            color: var(--primary);
            font-size: 16px;
        }

        @media (max-width: 991px) {
            .hero-section {
                padding: 64px 0 80px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 48px;
                text-align: center;
            }
            .hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-btns {
                justify-content: center;
            }
            .platform-tags {
                justify-content: center;
            }
            .trust-row {
                justify-content: center;
            }
            .hero-visual {
                max-width: 420px;
                margin: 0 auto;
            }
            .hero-visual .mock-float {
                left: 10px;
            }
        }

        @media (max-width: 575px) {
            .hero-section {
                padding: 48px 0 64px;
            }
            .hero-content h1 {
                font-size: 32px;
            }
            .hero-btns {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-download,
            .btn-secondary-light {
                justify-content: center;
            }
        }

        /* ============================================
           通用区块
        ============================================ */
        .section {
            padding: 88px 0;
        }

        .section-sm {
            padding: 56px 0;
        }

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

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

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-header .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 20px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .section-header h2 {
            font-size: clamp(28px, 3.5vw, 36px);
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        @media (max-width: 575px) {
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
        }

        /* ============================================
           功能轮播
        ============================================ */
        .feature-carousel-section {
            background: var(--white);
            padding: 88px 0;
        }

        .carousel-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 12px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            transition: box-shadow 0.3s ease;
            margin-bottom: 16px;
        }

        .carousel-card:hover {
            box-shadow: var(--shadow-lg);
        }

        .carousel-card img {
            border-radius: 12px;
            width: 100%;
            height: 280px;
            object-fit: cover;
        }

        .carousel-card-body {
            padding: 16px 8px 8px;
        }

        .carousel-card .feature-pill {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 20px;
            margin-bottom: 8px;
        }

        .carousel-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        .custom-carousel-indicators {
            display: flex;
            justify-content: center;
            gap: 6px;
            margin-top: 24px;
        }

        .custom-carousel-indicators [data-bs-target] {
            width: 26px;
            height: 4px;
            border-radius: 4px;
            background: #D1D5DB;
            border: none;
            padding: 0;
            transition: all 0.3s ease;
            opacity: 1;
        }

        .custom-carousel-indicators .active {
            background: var(--primary);
            width: 40px;
        }

        .carousel-control-prev,
        .carousel-control-next {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(15, 118, 110, 0.12);
            border: 1px solid rgba(15, 118, 110, 0.2);
            top: 50%;
            transform: translateY(-50%);
            opacity: 1;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .carousel-control-prev {
            left: -60px;
        }

        .carousel-control-next {
            right: -60px;
        }

        .carousel-control-prev:hover,
        .carousel-control-next:hover {
            background: var(--primary-light);
        }

        .carousel-control-prev i,
        .carousel-control-next i {
            color: var(--primary);
            font-size: 18px;
        }

        @media (max-width: 1199px) {
            .carousel-control-prev {
                left: -20px;
            }
            .carousel-control-next {
                right: -20px;
            }
        }

        @media (max-width: 575px) {
            .carousel-card img {
                height: 200px;
            }
            .carousel-control-prev,
            .carousel-control-next {
                display: none;
            }
        }

        /* ============================================
           系统要求
        ============================================ */
        .system-section {
            background: var(--bg-warm);
            padding: 88px 0;
        }

        .system-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .system-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }

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

        .system-card .icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            font-size: 24px;
            color: var(--primary);
        }

        .system-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .system-card .platform-badge {
            font-size: 12px;
            color: var(--accent);
            font-weight: 600;
        }

        .system-card ul {
            list-style: none;
            padding: 0;
            margin: 18px 0 0;
        }

        .system-card ul li {
            display: flex;
            justify-content: space-between;
            padding: 8px 0;
            border-bottom: 1px dashed rgba(15, 23, 42, 0.08);
            font-size: 14px;
        }

        .system-card ul li:last-child {
            border-bottom: none;
        }

        .system-card ul li .label {
            color: var(--text-muted);
        }

        .system-card ul li .value {
            font-weight: 600;
            color: var(--text-main);
        }

        .system-check-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 20px;
            font-size: 14px;
            color: var(--primary);
            font-weight: 500;
            background: transparent;
            border: none;
            padding: 8px 0;
        }

        .system-check-btn:hover {
            color: var(--primary-dark);
        }

        .system-check-btn i {
            transition: transform 0.3s ease;
        }

        .system-check-btn:hover i {
            transform: translateX(4px);
        }

        @media (max-width: 991px) {
            .system-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 575px) {
            .system-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ============================================
           评价墙
        ============================================ */
        .reviews-section {
            background: var(--white);
            padding: 88px 0;
        }

        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .review-card {
            background: var(--bg-warm);
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid var(--border-light);
            transition: all 0.3s ease;
        }

        .review-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .review-stars {
            color: var(--accent);
            font-size: 16px;
            margin-bottom: 16px;
            letter-spacing: 2px;
        }

        .review-text {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .review-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            overflow: hidden;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--primary);
            font-weight: 600;
        }

        .review-user .name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
        }

        .review-user .role {
            font-size: 13px;
            color: var(--text-muted);
        }

        @media (max-width: 991px) {
            .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 575px) {
            .reviews-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ============================================
           最新资讯列表
        ============================================ */
        .news-section {
            background: var(--bg-warm);
            padding: 88px 0;
        }

        .news-list-wrap {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 16px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }

        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 20px 12px;
            border-bottom: 1px solid rgba(15, 23, 42, 0.06);
            transition: background 0.25s ease;
            border-radius: 8px;
        }

        .news-item:last-child {
            border-bottom: none;
        }

        .news-item:hover {
            background: rgba(15, 118, 110, 0.04);
        }

        .news-left {
            display: flex;
            align-items: center;
            gap: 14px;
            min-width: 150px;
        }

        .news-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 20px;
            white-space: nowrap;
        }

        .news-date {
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
        }

        .news-main {
            flex: 1;
        }

        .news-main h4 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-main);
            transition: color 0.25s ease;
        }

        .news-item:hover .news-main h4 {
            color: var(--primary);
        }

        .news-main p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-arrow {
            color: var(--text-muted);
            font-size: 16px;
            transition: all 0.25s ease;
            align-self: center;
        }

        .news-item:hover .news-arrow {
            color: var(--primary);
            transform: translateX(4px);
        }

        .news-empty {
            text-align: center;
            padding: 48px 20px;
            color: var(--text-muted);
            font-size: 15px;
            border: 2px dashed rgba(15, 23, 42, 0.1);
            border-radius: 12px;
            background: rgba(248, 246, 243, 0.5);
        }

        .news-empty i {
            font-size: 32px;
            display: block;
            margin-bottom: 12px;
            color: rgba(15, 23, 42, 0.2);
        }

        .section-header .view-all-link {
            font-size: 14px;
            color: var(--primary);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 10px;
        }

        .section-header .view-all-link:hover {
            color: var(--primary-dark);
        }

        @media (max-width: 767px) {
            .news-item {
                flex-direction: column;
                gap: 8px;
            }
            .news-left {
                min-width: 0;
                flex-wrap: wrap;
            }
            .news-arrow {
                display: none;
            }
        }

        /* ============================================
           FAQ 区块
        ============================================ */
        .faq-section {
            background: var(--white);
            padding: 88px 0;
        }

        .faq-container {
            max-width: 860px;
            margin: 0 auto;
        }

        .accordion-item {
            border: 1px solid var(--border-light);
            border-radius: 12px;
            margin-bottom: 14px;
            overflow: hidden;
            background: var(--white);
            transition: all 0.3s ease;
        }

        .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.08);
        }

        .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            background: transparent;
            padding: 18px 22px;
            border: none;
            text-align: left;
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }

        .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: rgba(15, 118, 110, 0.03);
            box-shadow: none;
        }

        .accordion-button::after {
            display: none;
        }

        .accordion-button i {
            font-size: 16px;
            color: var(--text-muted);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .accordion-button:not(.collapsed) i {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .accordion-body {
            padding: 0 22px 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            border-left: 3px solid var(--primary);
            margin: 0 22px;
            padding-left: 18px;
            padding-top: 8px;
            padding-bottom: 18px;
        }

        /* ============================================
           底部 CTA
        ============================================ */
        .cta-section {
            position: relative;
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 70%, var(--primary) 100%);
            padding: 80px 0;
            overflow: hidden;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image:
                radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 40%),
                linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 100% 100%, 36px 36px, 36px 36px;
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 800;
            color: var(--white);
            margin-bottom: 16px;
        }

        .cta-section .cta-desc {
            font-size: 16px;
            color: rgba(248, 250, 252, 0.75);
            max-width: 580px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }

        .cta-btns {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 28px;
        }

        .cta-meta {
            font-size: 13px;
            color: rgba(248, 250, 252, 0.6);
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .cta-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .cta-meta i {
            color: var(--accent-hover);
            font-size: 12px;
        }

        @media (max-width: 575px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-btns {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-btns .btn-download,
            .cta-btns .btn-secondary-light {
                justify-content: center;
            }
            .cta-meta {
                flex-direction: column;
                gap: 10px;
            }
        }

        /* ============================================
           页脚
        ============================================ */
        .site-footer {
            background: var(--dark);
            padding: 64px 0 28px;
            color: rgba(248, 250, 252, 0.7);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 48px;
        }

        .footer-brand .brand-text {
            display: block;
            margin-bottom: 12px;
            font-size: 20px;
        }

        .footer-brand .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(248, 250, 252, 0.55);
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

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

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

        .footer-col ul li a {
            color: rgba(248, 250, 252, 0.55);
            font-size: 14px;
            transition: color 0.25s ease;
        }

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

        .footer-contact {
            font-size: 14px;
            line-height: 2;
            color: rgba(248, 250, 252, 0.55);
        }

        .footer-contact i {
            color: var(--accent-hover);
            margin-right: 8px;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: rgba(248, 250, 252, 0.4);
        }

        .footer-bottom span {
            margin: 0 8px;
        }

        @media (max-width: 991px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }
        }

        @media (max-width: 575px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ============================================
           通用工具类
        ============================================ */
        .section-divider {
            height: 1px;
            background: linear-gradient(to right, transparent, var(--border-light), transparent);
            margin: 0;
        }

        .text-primary-brand {
            color: var(--primary) !important;
        }

        .bg-warm {
            background: var(--bg-warm);
        }

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

        .shadow-sm-custom {
            box-shadow: var(--shadow-sm);
        }

        .shadow-md-custom {
            box-shadow: var(--shadow-md);
        }

        .shadow-lg-custom {
            box-shadow: var(--shadow-lg);
        }

/* roulang page: category1 */
:root {
            --primary: #0F766E;
            --primary-dark: #134E4A;
            --primary-light: #CCFBF1;
            --accent: #D97706;
            --accent-hover: #F59E0B;
            --bg: #F8F6F3;
            --white: #FFFFFF;
            --dark: #0F172A;
            --text: #111827;
            --text-secondary: #4B5563;
            --text-muted: #9CA3AF;
            --text-invert: #F8FAFC;
            --success: #059669;
            --warning: #D97706;
            --error: #DC2626;
            --info: #0284C7;
            --radius: 16px;
            --radius-sm: 12px;
            --radius-xs: 10px;
            --shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 10px 30px rgba(15, 23, 42, 0.1);
            --transition: all 0.3s ease;
            --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
            --container-w: 1280px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            height: auto;
            object-fit: cover;
            border-radius: var(--radius-sm);
        }

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

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

        ul,
        ol {
            padding-left: 1.2rem;
        }

        .container {
            max-width: var(--container-w);
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
        }

        section {
            padding: 88px 0;
        }

        @media (max-width: 767.98px) {
            section {
                padding: 56px 0;
            }
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            color: var(--primary);
            background: rgba(15, 118, 110, 0.08);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: clamp(28px, 3vw, 34px);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
            margin-bottom: 36px;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--accent);
            color: #1A1A1A;
            font-weight: 700;
            font-size: 16px;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-xs);
            border: none;
            box-shadow: 0 4px 14px rgba(217, 119, 6, 0.25);
            transition: var(--transition);
            cursor: pointer;
            min-width: 44px;
        }

        .btn-cta:hover {
            background: var(--accent-hover);
            color: #1A1A1A;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(217, 119, 6, 0.35);
        }

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

        .btn-cta:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 16px;
            height: 48px;
            padding: 0 26px;
            border-radius: var(--radius-xs);
            border: 1.5px solid var(--primary);
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-outline:hover {
            background: rgba(15, 118, 110, 0.08);
            border-color: var(--primary-dark);
            color: var(--primary-dark);
        }

        .btn-outline:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--text-invert);
            font-weight: 600;
            font-size: 16px;
            height: 48px;
            padding: 0 26px;
            border-radius: var(--radius-xs);
            border: 1.5px solid rgba(248, 250, 252, 0.7);
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-outline-light:hover {
            background: rgba(248, 250, 252, 0.1);
            border-color: var(--text-invert);
            color: var(--text-invert);
        }

        /* Header & Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--dark) 100%);
            box-shadow: 0 2px 12px rgba(15, 23, 42, 0.2);
        }

        .site-header.scrolled {
            background: rgba(15, 23, 42, 0.92);
            backdrop-filter: blur(12px);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }

        .site-header .navbar {
            padding: 14px 0;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-right: 0;
            padding: 0;
        }

        .navbar-brand:hover {
            opacity: 0.9;
        }

        .brand-mark {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary-dark);
            border-radius: 10px;
            font-size: 16px;
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-invert);
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .site-nav {
            display: flex;
            align-items: center;
            gap: 30px;
            margin: 0 auto;
            list-style: none;
            padding: 0;
        }

        .site-nav li a {
            color: rgba(248, 250, 252, 0.85);
            font-size: 15px;
            font-weight: 500;
            text-decoration: none;
            position: relative;
            padding: 6px 0;
            transition: var(--transition);
        }

        .site-nav li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent);
            transition: width 0.3s ease;
        }

        .site-nav li a:hover,
        .site-nav li a.active {
            color: var(--text-invert);
        }

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

        .header-actions {
            display: flex;
            align-items: center;
            gap: 18px;
            margin-left: 16px;
        }

        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: rgba(248, 250, 252, 0.9);
            background: rgba(255, 255, 255, 0.1);
            padding: 5px 14px;
            border-radius: 20px;
            white-space: nowrap;
        }

        .status-badge .dot {
            width: 6px;
            height: 6px;
            background: var(--success);
            border-radius: 50%;
            display: inline-block;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(5, 150, 105, 0.6);
            }
            50% {
                box-shadow: 0 0 0 4px rgba(5, 150, 105, 0);
            }
        }

        .countdown-box {
            display: flex;
            align-items: baseline;
            gap: 6px;
            background: rgba(255, 255, 255, 0.08);
            padding: 5px 14px;
            border-radius: 8px;
            white-space: nowrap;
        }

        .countdown-label {
            font-size: 11px;
            color: rgba(248, 250, 252, 0.6);
            text-align: center;
        }

        .countdown-timer {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-invert);
            font-variant-numeric: tabular-nums;
            letter-spacing: 1px;
        }

        .countdown-timer span {
            color: var(--accent);
            margin: 0 1px;
        }

        .navbar-toggler {
            border: 1px solid rgba(248, 250, 252, 0.3);
            color: var(--text-invert);
            padding: 8px 12px;
            border-radius: 8px;
            background: transparent;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.5);
            outline: none;
        }

        @media (max-width: 991.98px) {
            .site-header .navbar-collapse {
                background: rgba(15, 23, 42, 0.98);
                padding: 20px;
                border-radius: 0 0 16px 16px;
                margin-top: 12px;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                z-index: 1050;
            }

            .site-nav {
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                margin: 0 0 16px 0;
                width: 100%;
            }

            .site-nav li {
                width: 100%;
                border-bottom: 1px solid rgba(248, 250, 252, 0.08);
            }

            .site-nav li a {
                display: block;
                font-size: 16px;
                line-height: 48px;
                padding: 0 4px;
                color: rgba(248, 250, 252, 0.9);
            }

            .site-nav li a::after {
                display: none;
            }

            .header-actions {
                flex-wrap: wrap;
                gap: 12px;
                margin-left: 0;
                width: 100%;
            }

            .btn-cta {
                width: 100%;
            }
        }

        /* Page Hero (Category Page) */
        .page-hero {
            background: linear-gradient(135deg, var(--primary) 0%, var(--dark) 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image:
                radial-gradient(circle at 20% 60%, rgba(204, 251, 241, 0.15) 0%, transparent 300px),
                linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 60px 60px, 100% 100%;
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .page-hero .hero-breadcrumb {
            font-size: 14px;
            color: rgba(248, 250, 252, 0.7);
            margin-bottom: 18px;
        }

        .page-hero .hero-breadcrumb a {
            color: rgba(248, 250, 252, 0.85);
        }

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

        .page-hero .hero-breadcrumb span {
            margin: 0 8px;
            color: rgba(248, 250, 252, 0.4);
        }

        .page-hero h1 {
            font-size: clamp(32px, 5vw, 46px);
            font-weight: 800;
            color: var(--text-invert);
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .page-hero .lead {
            font-size: 17px;
            color: rgba(248, 250, 252, 0.85);
            max-width: 680px;
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* Alternating Feature Blocks */
        .feature-alternate {
            padding: 0;
            background: var(--white);
        }

        .feature-alternate .row {
            align-items: center;
        }

        .feature-block-row {
            padding: 80px 0;
        }

        .feature-block-row:nth-child(even) {
            background: var(--bg);
        }

        .feature-block-row:nth-child(odd) {
            background: var(--white);
        }

        .feature-number {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
            font-variant-numeric: tabular-nums;
            letter-spacing: 1px;
            margin-bottom: 10px;
            display: block;
        }

        .feature-block-row h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 18px;
            line-height: 1.35;
        }

        .feature-block-row p {
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .feature-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            text-decoration: none;
        }

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

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

        .feature-img-wrap {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            border: 1px solid rgba(15, 118, 110, 0.1);
            background: var(--white);
            padding: 12px;
        }

        .feature-img-wrap img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            border-radius: 10px;
            display: block;
        }

        .feature-img-wrap::after {
            content: '';
            position: absolute;
            bottom: 12px;
            left: 12px;
            right: 12px;
            height: 80px;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.4), transparent);
            border-radius: 0 0 10px 10px;
            pointer-events: none;
        }

        /* Steps Section */
        .steps-section {
            background: var(--white);
        }

        .step-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 32px 28px;
            height: 100%;
            border: 1px solid rgba(15, 118, 110, 0.06);
            transition: var(--transition);
            position: relative;
        }

        .step-card:hover {
            border-color: rgba(15, 118, 110, 0.2);
            box-shadow: var(--shadow-hover);
            background: var(--white);
        }

        .step-num {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: var(--text-invert);
            font-size: 20px;
            font-weight: 700;
            border-radius: 12px;
            margin-bottom: 20px;
        }

        .step-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text);
        }

        .step-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: radial-gradient(circle at 30% 30%, rgba(204, 251, 241, 0.1) 0%, transparent 400px);
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: clamp(28px, 3.5vw, 38px);
            font-weight: 800;
            color: var(--text-invert);
            margin-bottom: 14px;
        }

        .cta-section p {
            color: rgba(248, 250, 252, 0.75);
            margin-bottom: 28px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-meta {
            margin-top: 18px;
            font-size: 13px;
            color: rgba(248, 250, 252, 0.55);
            letter-spacing: 0.3px;
        }

        .cta-section .countdown-box {
            background: rgba(255, 255, 255, 0.1);
            padding: 8px 18px;
            border-radius: 8px;
            margin-bottom: 24px;
            display: inline-flex;
        }

        .cta-section .countdown-label {
            color: rgba(248, 250, 252, 0.7);
        }

        /* Footer */
        .site-footer {
            background: var(--dark);
            padding: 64px 0 0;
            color: rgba(248, 250, 252, 0.75);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .brand-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-invert);
            display: block;
            margin-bottom: 12px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(248, 250, 252, 0.6);
            max-width: 300px;
            margin-bottom: 0;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-invert);
            margin-bottom: 18px;
        }

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

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

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(248, 250, 252, 0.6);
            text-decoration: none;
            transition: var(--transition);
        }

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

        .footer-contact div {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            margin-bottom: 12px;
            color: rgba(248, 250, 252, 0.6);
        }

        .footer-contact i {
            color: var(--accent);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            padding: 24px 0;
            font-size: 14px;
            color: rgba(248, 250, 252, 0.4);
        }
        
        .footer-bottom span {
            color: rgba(248, 250, 252, 0.4);
        }

        @media (max-width: 991.98px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 575.98px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 4px;
            }
        }

        /* User Reviews Section */
        .reviews-section {
            background: var(--white);
        }

        .review-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 28px;
            height: 100%;
            border: 1px solid rgba(15, 118, 110, 0.05);
            transition: var(--transition);
            position: relative;
        }

        .review-card:hover {
            border-color: rgba(15, 118, 110, 0.2);
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }

        .review-stars {
            color: var(--accent);
            font-size: 14px;
            margin-bottom: 16px;
            letter-spacing: 2px;
        }

        .review-text {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .review-avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 16px;
            flex-shrink: 0;
        }

        .review-user-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
        }

        .review-user-role {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Responsive */
        @media (max-width: 767.98px) {
            .feature-block-row {
                padding: 48px 0;
            }
            .feature-img-wrap img {
                height: 220px;
            }
            .page-hero {
                padding: 56px 0 40px;
            }
        }

/* roulang page: category2 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #0F766E;
            --primary-dark: #134E4A;
            --primary-deep: #0B3B34;
            --primary-light: #CCFBF1;
            --primary-lighter: #E6FFF9;
            --accent: #D97706;
            --accent-hover: #F59E0B;
            --bg-soft: #F8F6F3;
            --bg-white: #FFFFFF;
            --bg-dark: #0F172A;
            --text-main: #111827;
            --text-secondary: #4B5563;
            --text-weak: #9CA3AF;
            --text-white: #F8FAFC;
            --border: #E5E7EB;
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-input: 8px;
            --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 10px 30px rgba(15, 23, 42, 0.10);
            --shadow-accent: 0 4px 14px rgba(217, 119, 6, 0.25);
            --font-main: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
        }

        /* ========== Reset / Base ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            background: var(--bg-soft);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        .container {
            max-width: 1240px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding: 88px 0;
        }
        .section-head {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 56px;
        }
        .section-title {
            font-size: clamp(28px, 4vw, 34px);
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            color: var(--text-secondary);
            font-size: 16px;
            margin-top: 12px;
        }

        /* ========== 按钮 ========== */
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #1A1A1A;
            font-weight: 700;
            font-size: 16px;
            height: 46px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            box-shadow: var(--shadow-accent);
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
            text-decoration: none;
        }
        .btn-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(217, 119, 6, 0.35);
            color: #1A1A1A;
        }
        .btn-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-accent);
        }
        .btn-cta:focus-visible,
        .btn-outline:focus-visible,
        .btn-link-more:focus-visible,
        .site-nav a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 16px;
            height: 46px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255, 255, 255, 0.6);
            cursor: pointer;
            transition: all 0.25s ease;
            text-decoration: none;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-link-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            background: none;
            border: none;
            padding: 0;
            cursor: pointer;
            transition: color 0.2s;
        }
        .btn-link-more i {
            transition: transform 0.2s;
        }
        .btn-link-more:hover {
            color: var(--primary-dark);
        }
        .btn-link-more:hover i {
            transform: translateX(4px);
        }

        /* ========== 导航 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1030;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--bg-dark) 100%);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            background: rgba(15, 23, 42, 0.92);
            backdrop-filter: blur(12px);
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18);
        }
        .navbar {
            padding: 14px 0;
        }
        .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            margin-right: 0;
        }
        .brand-mark {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
        }
        .brand-text {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .site-nav {
            margin: 0 auto;
            list-style: none;
            display: flex;
            align-items: center;
            gap: 32px;
            padding: 0;
        }
        .site-nav a {
            color: rgba(255, 255, 255, 0.8);
            font-size: 15px;
            font-weight: 500;
            position: relative;
            padding: 6px 2px;
            display: inline-block;
            transition: color 0.2s;
        }
        .site-nav a:hover {
            color: #fff;
        }
        .site-nav a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width 0.25s ease;
        }
        .site-nav a:hover::after,
        .site-nav a.active::after {
            width: 100%;
        }
        .site-nav a.active {
            color: #fff;
            font-weight: 700;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            font-size: 12px;
            padding: 6px 14px;
            border-radius: 20px;
            white-space: nowrap;
        }
        .status-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #34D399;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.5);
            }
            50% {
                box-shadow: 0 0 0 4px rgba(52, 211, 153, 0);
            }
        }
        .countdown-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            padding: 6px 14px;
            border-radius: 10px;
            white-space: nowrap;
        }
        .countdown-label {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.7);
        }
        .countdown-timer {
            font-family: "Courier New", monospace;
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 1px;
            font-variant-numeric: tabular-nums;
        }
        .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 22px;
            padding: 8px 10px;
            background: rgba(255, 255, 255, 0.12);
            border-radius: 10px;
        }
        .navbar-toggler:focus,
        .navbar-toggler:active {
            outline: none;
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
        }

        /* ========== 内页 Hero 条 ========== */
        .page-hero {
            position: relative;
            padding: 168px 0 110px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--bg-dark) 100%);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 48px 48px;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            right: -80px;
            top: -80px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(15, 118, 110, 0.35) 0%, transparent 70%);
            pointer-events: none;
        }
        .page-hero .hero-content {
            position: relative;
            z-index: 2;
        }
        .page-hero .breadcrumb-custom {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            margin-bottom: 22px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }
        .page-hero .breadcrumb-custom a {
            color: rgba(255, 255, 255, 0.7);
            transition: color 0.2s;
        }
        .page-hero .breadcrumb-custom a:hover {
            color: #fff;
        }
        .breadcrumb-custom .sep {
            margin: 0 10px;
            color: rgba(255, 255, 255, 0.4);
        }
        .breadcrumb-custom .current {
            color: #fff;
            font-weight: 500;
        }
        .page-hero h1 {
            font-size: clamp(32px, 5vw, 46px);
            color: #fff;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
        }
        .page-hero h1 .highlight {
            color: var(--accent-hover);
        }
        .page-hero .hero-lead {
            color: rgba(255, 255, 255, 0.85);
            font-size: 18px;
            max-width: 640px;
            line-height: 1.7;
        }

        /* ========== 信任数据指标 ========== */
        .trust-section {
            background: var(--bg-soft);
            padding-top: 0;
        }
        .trust-metrics {
            margin-top: -48px;
            position: relative;
            z-index: 5;
        }
        .metric-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 32px 24px 28px;
            text-align: center;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(229, 231, 235, 0.6);
            transition: all 0.3s ease;
            height: 100%;
        }
        .metric-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .metric-card .metric-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-lighter);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin: 0 auto 16px;
        }
        .metric-card .metric-value {
            font-size: 30px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }
        .metric-card .metric-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 10px;
            line-height: 1.5;
        }

        /* ========== 安全能力卡片 ========== */
        .capability-section {
            background: var(--bg-white);
        }
        .capability-card {
            background: #fff;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            height: 100%;
            border: 1px solid rgba(229, 231, 235, 0.5);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .capability-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-5px);
            border-color: var(--primary-light);
        }
        .capability-card .card-img-wrap {
            overflow: hidden;
            height: 200px;
        }
        .capability-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .capability-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .capability-card .card-body-custom {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }
        .capability-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .capability-card p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 0;
            flex-grow: 1;
        }
        .capability-card .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-lighter);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 14px;
            width: fit-content;
        }

        /* ========== FAQ + 表单区 ========== */
        .faq-form-section {
            background: var(--bg-soft);
        }
        .accordion-custom .accordion-item {
            border: 1px solid var(--border);
            border-radius: 14px;
            margin-bottom: 16px;
            overflow: hidden;
            box-shadow: none;
            transition: border-color 0.2s;
        }
        .accordion-custom .accordion-item:hover {
            border-color: rgba(15, 118, 110, 0.3);
        }
        .accordion-custom .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            padding: 18px 22px;
            background: #fff;
            box-shadow: none;
            position: relative;
            transition: background 0.2s, color 0.2s;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--primary-lighter);
            color: var(--primary-dark);
            border-left: 3px solid var(--primary);
            border-radius: 14px 14px 0 0;
        }
        .accordion-custom .accordion-button:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
        }
        .accordion-custom .accordion-button::after {
            background-size: 12px;
            transition: transform 0.3s;
        }
        .accordion-custom .accordion-button[aria-expanded="true"]::after {
            transform: rotate(180deg);
        }
        .accordion-custom .accordion-body {
            padding: 18px 22px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
            background: #fff;
            border-top: 1px solid rgba(15, 118, 110, 0.08);
        }

        /* ========== 联系表单 ========== */
        .contact-form-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 32px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
        }
        .contact-form-card h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
        }
        .contact-form-card .form-intro {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            line-height: 1.6;
        }
        .contact-form-card .form-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            margin-bottom: 6px;
        }
        .contact-form-card .form-control {
            border-radius: var(--radius-input);
            border: 1px solid var(--border);
            height: 44px;
            padding: 0 14px;
            font-size: 14px;
            color: var(--text-main);
            background: var(--bg-soft);
            transition: all 0.2s ease;
        }
        .contact-form-card textarea.form-control {
            height: auto;
            padding: 12px 14px;
            resize: vertical;
            min-height: 120px;
        }
        .contact-form-card .form-control:focus {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
        }
        .contact-form-card .form-select {
            border-radius: var(--radius-input);
            border: 1px solid var(--border);
            height: 44px;
            font-size: 14px;
            color: var(--text-main);
            background-color: var(--bg-soft);
            transition: all 0.2s;
        }
        .contact-form-card .form-select:focus {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
        }
        .contact-form-card .btn-cta {
            width: 100%;
            justify-content: center;
            height: 48px;
        }
        .form-agree {
            font-size: 12px;
            color: var(--text-weak);
            text-align: center;
            margin-top: 12px;
            line-height: 1.5;
        }

        /* ========== 底部 CTA ========== */
        .bottom-cta {
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary-dark) 100%);
            position: relative;
            overflow: hidden;
            padding: 72px 0;
        }
        .bottom-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
        }
        .bottom-cta .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .bottom-cta h2 {
            color: #fff;
            font-size: clamp(26px, 4vw, 36px);
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .bottom-cta .cta-lead {
            color: rgba(255, 255, 255, 0.75);
            font-size: 15px;
            margin-bottom: 32px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }
        .bottom-cta .btn-group-cta {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-meta {
            margin-top: 20px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .cta-meta span {
            font-variant-numeric: tabular-nums;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 64px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .brand-text {
            color: #fff;
            font-size: 20px;
            font-weight: 800;
        }
        .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            margin-top: 12px;
            line-height: 1.7;
            max-width: 300px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: var(--accent-hover);
        }
        .footer-contact div {
            margin-bottom: 12px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
        }
        .footer-contact i {
            margin-right: 8px;
            color: var(--primary-light);
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            display: flex;
            justify-content: center;
            gap: 8px;
            padding: 22px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            flex-wrap: wrap;
            align-items: center;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1199px) {
            .site-nav {
                gap: 24px;
            }
            .header-actions {
                gap: 12px;
            }
            .countdown-box {
                display: none;
            }
        }
        @media (max-width: 991px) {
            .navbar-collapse {
                background: var(--bg-dark);
                padding: 16px 20px;
                border-radius: 0 0 16px 16px;
                margin-top: 12px;
                max-height: calc(100vh - 100px);
                overflow-y: auto;
            }
            .site-nav {
                flex-direction: column;
                align-items: flex-start !important;
                gap: 0 !important;
                width: 100%;
            }
            .site-nav li {
                width: 100%;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            }
            .site-nav a {
                display: block;
                padding: 14px 0;
                font-size: 16px;
            }
            .site-nav a::after {
                display: none;
            }
            .header-actions {
                flex-direction: column;
                gap: 12px;
                align-items: stretch;
                padding: 16px 0 4px;
            }
            .status-badge,
            .countdown-box {
                width: fit-content;
            }
            .btn-cta {
                width: 100%;
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: span 2;
            }
            .faq-form-section .container .row .col-lg-4 {
                margin-top: 48px;
            }
        }
        @media (max-width: 767px) {
            .section {
                padding: 56px 0;
            }
            .page-hero {
                padding: 140px 0 90px;
            }
            .trust-metrics {
                margin-top: -36px;
            }
            .metric-card {
                padding: 24px 16px 20px;
            }
            .metric-card .metric-value {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: span 1;
            }
            .footer-col h4 {
                margin-bottom: 12px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 4px;
                padding: 18px 0 24px;
            }
            .contact-form-card {
                padding: 24px;
            }
            .bottom-cta .btn-group-cta {
                flex-direction: column;
                align-items: center;
            }
            .bottom-cta .btn-group-cta .btn-cta,
            .bottom-cta .btn-group-cta .btn-outline {
                width: 100%;
                justify-content: center;
                max-width: 320px;
            }
        }
        @media (max-width: 575px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .brand-text {
                font-size: 17px;
            }
            .brand-mark {
                width: 38px;
                height: 38px;
                font-size: 16px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero .hero-lead {
                font-size: 15px;
            }
            .section-title {
                font-size: 26px;
            }
        }

/* roulang page: article */
:root {
            --primary: #0F766E;
            --primary-dark: #134E4A;
            --primary-light: #CCFBF1;
            --accent: #D97706;
            --accent-hover: #F59E0B;
            --bg: #F8F6F3;
            --white: #FFFFFF;
            --dark: #0F172A;
            --text-main: #111827;
            --text-sub: #4B5563;
            --text-weak: #9CA3AF;
            --text-light: #F8FAFC;
            --border: #E5E7EB;
            --success: #059669;
            --warning: #D97706;
            --error: #DC2626;
            --info: #0284C7;
            --radius: 14px;
            --radius-sm: 10px;
            --shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 10px 30px rgba(15, 23, 42, 0.10);
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.7;
            padding-top: 80px;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        a:focus-visible,
        button:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            box-shadow: none;
        }

        .container {
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (min-width: 1200px) {
            .container {
                max-width: 1260px;
            }
        }

        @media (min-width: 1400px) {
            .container {
                max-width: 1280px;
            }
        }

        @media (max-width: 576px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: linear-gradient(135deg, #0F766E 0%, #0F172A 100%);
            transition: all 0.3s ease;
        }

        .site-header.scrolled {
            background: rgba(15, 23, 42, 0.92);
            backdrop-filter: blur(12px);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }

        .navbar {
            padding: 14px 0;
            min-height: 80px;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            margin: 0;
        }

        .brand-mark {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-hover);
            font-size: 16px;
            flex-shrink: 0;
        }

        .brand-text {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            padding: 6px 10px;
            border-radius: 8px;
            background: transparent;
        }

        .navbar-toggler:hover,
        .navbar-toggler:focus {
            border-color: var(--accent);
            color: var(--accent-hover);
        }

        .site-nav {
            margin: 0 auto;
            list-style: none;
            display: flex;
            align-items: center;
            gap: 32px;
            padding: 0;
        }

        .site-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-weight: 500;
            font-size: 15px;
            display: inline-block;
            padding: 6px 2px;
            position: relative;
            transition: color 0.3s ease;
        }

        .site-nav a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: width 0.3s ease;
        }

        .site-nav a:hover {
            color: #fff;
        }

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

        .site-nav a.active {
            color: #fff;
            font-weight: 700;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.12);
            border-radius: 999px;
            padding: 5px 12px;
            color: rgba(255, 255, 255, 0.9);
            font-size: 12px;
            font-weight: 500;
        }

        .status-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--success);
            box-shadow: 0 0 6px rgba(5, 150, 105, 0.8);
        }

        .countdown-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 10px;
            padding: 6px 12px;
        }

        .countdown-label {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.6);
            white-space: nowrap;
        }

        .countdown-timer {
            font-family: "SF Mono", "Consolas", "Courier New", monospace;
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            font-variant-numeric: tabular-nums;
            letter-spacing: 1px;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--accent);
            color: #1A1A1A;
            font-weight: 700;
            font-size: 15px;
            height: 46px;
            padding: 0 24px;
            border-radius: 10px;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 14px rgba(217, 119, 6, 0.25);
            text-decoration: none;
        }

        .btn-cta:hover {
            background: var(--accent-hover);
            color: #1A1A1A;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(217, 119, 6, 0.35);
        }

        .btn-cta:active {
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(217, 119, 6, 0.25);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            height: 46px;
            padding: 0 24px;
            border-radius: 10px;
            border: 2px solid var(--primary);
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
        }

        .btn-secondary:hover {
            background: rgba(15, 118, 110, 0.08);
            border-color: var(--primary-dark);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }

        @media (max-width: 991.98px) {
            body {
                padding-top: 70px;
            }

            .navbar {
                min-height: 70px;
                padding: 10px 0;
            }

            .navbar-collapse {
                background: #0F172A;
                border-radius: 14px;
                padding: 20px 20px 24px;
                margin-top: 12px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
            }

            .site-nav {
                flex-direction: column;
                align-items: stretch;
                gap: 0 !important;
                width: 100%;
            }

            .site-nav li {
                width: 100%;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }

            .site-nav li:last-child {
                border-bottom: none;
            }

            .site-nav a {
                display: block;
                padding: 14px 0;
                font-size: 16px;
                line-height: 24px;
                width: 100%;
            }

            .header-actions {
                flex-direction: column;
                align-items: stretch;
                gap: 14px;
                margin-top: 20px;
                width: 100%;
            }

            .status-badge,
            .countdown-box {
                justify-content: center;
            }

            .btn-cta {
                width: 100%;
            }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-nav {
            padding: 28px 0 8px;
            font-size: 14px;
            color: var(--text-weak);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }

        .breadcrumb-nav a {
            color: var(--primary);
            font-weight: 500;
        }

        .breadcrumb-nav a:hover {
            color: var(--primary-dark);
        }

        .breadcrumb-sep {
            color: var(--text-weak);
            margin: 0 2px;
        }

        .breadcrumb-current {
            color: var(--text-main);
            font-weight: 600;
            max-width: 400px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== 文章页 ===== */
        .article-page {
            padding: 0 0 40px;
        }

        .article-wrap {
            max-width: 960px;
            margin: 0 auto;
        }

        .article-card {
            background: var(--white);
            border-radius: 18px;
            box-shadow: var(--shadow);
            padding: 40px 40px 32px;
            margin-top: 16px;
        }

        .article-header {
            text-align: center;
            margin-bottom: 24px;
        }

        .article-header h1 {
            font-size: clamp(26px, 3.6vw, 38px);
            font-weight: 800;
            line-height: 1.35;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px 22px;
            font-size: 13px;
            color: var(--text-weak);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--primary);
            font-size: 13px;
        }

        .article-cover {
            border-radius: 16px;
            overflow: hidden;
            margin: 28px 0 32px;
            border: 1px solid var(--border);
            box-shadow: 0 6px 24px rgba(15, 23, 42, 0.08);
        }

        .article-cover img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .article-content {
            max-width: 720px;
            margin: 0 auto;
        }

        .article-content h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.4;
            margin: 40px 0 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary-light);
            color: var(--text-main);
        }

        .article-content h3 {
            font-size: 22px;
            font-weight: 600;
            line-height: 1.4;
            margin: 30px 0 14px;
            color: var(--text-main);
        }

        .article-content h4 {
            font-size: 18px;
            font-weight: 600;
            margin: 24px 0 12px;
            color: var(--text-main);
        }

        .article-content p {
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 24px;
            color: var(--text-sub);
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 24px;
            padding-left: 24px;
            color: var(--text-sub);
        }

        .article-content ul li {
            list-style: disc;
            margin-bottom: 8px;
            line-height: 1.7;
        }

        .article-content ul li::marker {
            color: var(--primary);
        }

        .article-content ol li {
            list-style: decimal;
            margin-bottom: 8px;
            line-height: 1.7;
            font-weight: 500;
        }

        .article-content ol li::marker {
            font-weight: 700;
            color: var(--primary);
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(15, 118, 110, 0.06);
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            margin: 28px 0;
            font-style: italic;
            color: var(--text-sub);
        }

        .article-content blockquote p {
            margin-bottom: 0;
        }

        .article-content img {
            border-radius: 12px;
            margin: 28px 0;
        }

        .article-content figure {
            margin: 28px 0;
        }

        .article-content figcaption {
            text-align: center;
            font-size: 13px;
            color: var(--text-weak);
            margin-top: 8px;
        }

        .article-content code {
            background: #EEF2F7;
            padding: 3px 8px;
            border-radius: 6px;
            font-size: 14px;
            color: var(--primary-dark);
            font-family: "SF Mono", "Consolas", monospace;
        }

        .article-content pre {
            background: var(--dark);
            color: #E2E8F0;
            padding: 22px 24px;
            border-radius: 12px;
            overflow-x: auto;
            margin: 28px 0;
            font-size: 14px;
            line-height: 1.6;
        }

        .article-content pre code {
            background: transparent;
            color: inherit;
            padding: 0;
            font-size: inherit;
        }

        .article-content table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            margin: 28px 0;
            font-size: 15px;
        }

        .article-content table th {
            background: #F1F5F9;
            padding: 12px 16px;
            font-weight: 600;
            text-align: left;
            border-bottom: 1px solid var(--border);
            color: var(--text-main);
        }

        .article-content table td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border);
            color: var(--text-sub);
        }

        .article-content table tr:last-child td {
            border-bottom: none;
        }

        .article-content table tr:hover td {
            background: rgba(15, 118, 110, 0.03);
        }

        .article-content hr {
            border: none;
            border-top: 1px solid var(--border);
            margin: 32px 0;
        }

        .article-footer {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }

        .article-tags {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 16px;
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(15, 118, 110, 0.08);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 500;
            padding: 5px 14px;
            border-radius: 999px;
            transition: var(--transition);
        }

        .tag-pill:hover {
            background: rgba(15, 118, 110, 0.16);
            color: var(--primary-dark);
        }

        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 16px;
        }

        .share-label {
            font-size: 14px;
            color: var(--text-weak);
            margin-right: 4px;
        }

        .share-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text-sub);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            cursor: pointer;
            transition: var(--transition);
        }

        .share-btn:hover {
            background: rgba(15, 118, 110, 0.08);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== 上一篇 / 下一篇 ===== */
        .article-pager {
            display: flex;
            gap: 20px;
            margin-top: 28px;
        }

        .pager-item {
            flex: 1;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 22px 24px;
            transition: var(--transition);
            min-height: 90px;
        }

        .pager-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
        }

        .pager-item a {
            display: flex;
            flex-direction: column;
            gap: 8px;
            text-decoration: none;
            color: inherit;
            height: 100%;
        }

        .pager-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
        }

        .pager-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            margin-top: 44px;
        }

        .related-section h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
            text-align: center;
        }

        .related-section .section-desc {
            text-align: center;
            color: var(--text-weak);
            font-size: 14px;
            margin-bottom: 28px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            text-decoration: none;
            border: 1px solid transparent;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .related-thumb {
            height: 180px;
            overflow: hidden;
        }

        .related-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .related-card:hover .related-thumb img {
            transform: scale(1.04);
        }

        .related-body {
            padding: 20px 22px 24px;
        }

        .related-body h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.45;
            color: var(--text-main);
            margin-bottom: 8px;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .related-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        /* ===== 返回按钮 ===== */
        .article-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-top: 36px;
            flex-wrap: wrap;
        }

        /* ===== 空态 ===== */
        .not-found {
            text-align: center;
            padding: 80px 24px;
            background: var(--white);
            border-radius: 18px;
            box-shadow: var(--shadow);
            margin-top: 16px;
        }

        .not-found i {
            font-size: 56px;
            color: var(--text-weak);
            margin-bottom: 20px;
            display: block;
        }

        .not-found h1 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .not-found p {
            color: var(--text-sub);
            font-size: 16px;
            margin-bottom: 28px;
        }

        /* ===== CTA ===== */
        .cta-section {
            margin-top: 60px;
            background: linear-gradient(135deg, #0F172A 0%, #134E4A 100%);
            border-radius: 20px;
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 40%),
                linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 100% 100%, 40px 40px, 40px 40px;
            pointer-events: none;
        }

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

        .cta-section h2 {
            font-size: clamp(24px, 3.2vw, 34px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .cta-desc {
            color: rgba(255, 255, 255, 0.75);
            font-size: 16px;
            margin-bottom: 30px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .cta-section .btn-cta {
            min-width: 180px;
            height: 50px;
            font-size: 16px;
        }

        .cta-section .btn-secondary {
            border-color: rgba(255, 255, 255, 0.5);
            color: #fff;
            height: 50px;
            min-width: 160px;
            font-size: 16px;
            background: transparent;
        }

        .cta-section .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
        }

        .cta-meta {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 20px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            flex-wrap: wrap;
        }

        .cta-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0F172A;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 28px;
            margin-top: 60px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .brand-text {
            font-size: 22px;
            color: #fff;
            display: block;
            margin-bottom: 10px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 280px;
        }

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

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

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color 0.3s ease;
            text-decoration: none;
        }

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

        .footer-contact div {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            margin-bottom: 12px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-contact i {
            color: var(--primary-light);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .article-card {
                padding: 28px 24px 24px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 767.98px) {
            .article-cover img {
                height: 300px;
            }

            .article-pager {
                flex-direction: column;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .cta-section {
                padding: 40px 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                gap: 8px;
            }
        }

        @media (max-width: 575.98px) {
            .breadcrumb-nav {
                font-size: 13px;
            }

            .breadcrumb-current {
                max-width: 200px;
            }

            .article-card {
                padding: 22px 16px 20px;
                border-radius: 14px;
            }

            .article-header h1 {
                font-size: 24px;
            }

            .article-meta {
                gap: 8px 14px;
                font-size: 12px;
            }

            .article-cover img {
                height: 220px;
            }

            .article-content h2 {
                font-size: 22px;
            }

            .article-content h3 {
                font-size: 19px;
            }

            .article-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .article-actions .btn-secondary {
                width: 100%;
            }

            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-section .btn-cta,
            .cta-section .btn-secondary {
                width: 100%;
            }
        }