:root {
            --bg-deep: #060b16;
            --bg-primary: #0b1120;
            --bg-secondary: #111b2e;
            --bg-card: rgba(255, 255, 255, 0.035);
            --bg-card-hover: rgba(255, 255, 255, 0.06);
            --border-glass: rgba(255, 255, 255, 0.07);
            --border-active: rgba(6, 182, 212, 0.3);
            --text-primary: #f0f4ff;
            --text-secondary: rgba(240, 244, 255, 0.7);
            --text-muted: rgba(240, 244, 255, 0.4);
            --accent-cyan: #06b6d4;
            --accent-teal: #34d399;
            --accent-indigo: #8b5cf6;
            --accent-blue: #3b82f6;
            --accent-amber: #f59e0b;
            --accent-gold: #fbbf24;
            --accent-rose: #f43f5e;
            --gradient-main: linear-gradient(135deg, #06b6d4, #34d399);
            --gradient-lets: linear-gradient(135deg, #f59e0b, #fbbf24, #f59e0b);
            --gradient-glow: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(52, 211, 153, 0.15));
            --gradient-glow-lets: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(251, 191, 36, 0.1));
            --shadow-glow: 0 0 80px rgba(6, 182, 212, 0.07), 0 0 160px rgba(52, 211, 153, 0.03);
            --shadow-glow-lets: 0 0 80px rgba(245, 158, 11, 0.07), 0 0 160px rgba(251, 191, 36, 0.04);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Roboto, sans-serif;
            --radius-xl: 32px;
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: 90px;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        ::-webkit-scrollbar {
            width: 5px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-deep);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--accent-cyan);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--accent-teal);
        }
        canvas#particles {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 0;
            pointer-events: none;
            opacity: 0.28;
        }
        .app {
            position: relative;
            z-index: 1;
        }
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 28px;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== HEADER ========== */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            padding: 12px 0;
            background: rgba(6, 11, 22, 0.55);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid var(--border-glass);
            transition: all var(--transition-smooth);
        }
        header.scrolled {
            background: rgba(6, 11, 22, 0.94);
            box-shadow: 0 4px 50px rgba(0, 0, 0, 0.55);
            padding: 8px 0;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            font-weight: 800;
            font-size: 20px;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            flex-shrink: 0;
            transition: opacity var(--transition-fast);
        }
        .logo:hover {
            opacity: 0.85;
        }
        .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: var(--gradient-main);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 900;
            color: #fff;
            box-shadow: 0 0 36px rgba(6, 182, 212, 0.22);
            transition: transform var(--transition-smooth);
        }
        .logo:hover .logo-icon {
            transform: scale(1.06) rotate(-5deg);
        }
        .logo span {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 2px;
            flex-wrap: wrap;
        }
        nav a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 13.5px;
            font-weight: 500;
            padding: 7px 14px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            position: relative;
            letter-spacing: 0.08px;
            white-space: nowrap;
        }
        nav a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.05);
        }
        nav a.active {
            color: #fff;
            background: rgba(6, 182, 212, 0.13);
            box-shadow: 0 0 18px rgba(6, 182, 212, 0.04);
            font-weight: 600;
        }
        nav a.active::after {
            content: '';
            position: absolute;
            bottom: 3px;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 2px;
            border-radius: 2px;
            background: var(--gradient-main);
        }
        nav a.nav-letsvpn {
            color: var(--accent-gold);
            font-weight: 700;
            border: 1px solid rgba(245, 158, 11, 0.25);
            background: rgba(245, 158, 11, 0.06);
            letter-spacing: 0.3px;
            animation: nav-pulse 3s ease-in-out infinite;
        }
        @keyframes nav-pulse {
            0%,
            100% {
                box-shadow: 0 0 6px rgba(245, 158, 11, 0.06);
            }
            50% {
                box-shadow: 0 0 20px rgba(245, 158, 11, 0.16);
            }
        }
        nav a.nav-letsvpn:hover {
            background: rgba(245, 158, 11, 0.14);
            border-color: rgba(245, 158, 11, 0.45);
            color: #fde68a;
            box-shadow: 0 0 26px rgba(245, 158, 11, 0.14);
        }
        nav a.nav-letsvpn::before {
            content: '⚡';
            font-size: 11px;
            margin-right: 3px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .btn-header {
            padding: 7px 18px;
            border-radius: var(--radius-sm);
            background: var(--gradient-main);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 28px rgba(6, 182, 212, 0.14);
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .btn-header:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 48px rgba(6, 182, 212, 0.28);
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 4px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
            z-index: 101;
        }
        .mobile-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .mobile-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 920px) {
            .mobile-toggle {
                display: flex;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 0 6px;
                gap: 1px;
                order: 10;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 11px 16px;
                font-size: 14px;
                text-align: center;
                border-radius: var(--radius-xs);
            }
            nav a.active::after {
                display: none;
            }
            nav a.nav-letsvpn::before {
                content: '⚡ ';
            }
            .header-actions .btn-header {
                display: none;
            }
            .header-actions .btn-header.mobile-show {
                display: inline-flex;
                font-size: 12px;
                padding: 6px 14px;
            }
        }
        @media (min-width: 921px) {
            .header-actions .btn-header.mobile-show {
                display: none;
            }
        }

        /* ========== PAGE HEADER ========== */
        .page-header {
            padding: 140px 0 50px;
            text-align: center;
            position: relative;
        }
        .page-header::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
            opacity: 0.1;
        }
        .page-header .section-label {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 2.8px;
            color: var(--accent-cyan);
            background: rgba(6, 182, 212, 0.06);
            padding: 4px 16px;
            border-radius: 50px;
            border: 1px solid rgba(6, 182, 212, 0.06);
            margin-bottom: 14px;
        }
        .page-header h1 {
            font-size: clamp(38px, 5.5vw, 58px);
            font-weight: 800;
            letter-spacing: -1.5px;
            margin-bottom: 10px;
            line-height: 1.08;
        }
        .page-header h1 .highlight {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-header .sub-desc {
            font-size: clamp(15px, 1.2vw, 18px);
            color: var(--text-secondary);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.75;
        }

        /* ========== DOWNLOAD GRID ========== */
        .download-section {
            padding: 50px 0 70px;
            position: relative;
        }
        .grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 26px;
            margin-top: 20px;
        }
        @media (max-width: 820px) {
            .grid {
                grid-template-columns: 1fr;
                max-width: 480px;
                margin-left: auto;
                margin-right: auto;
                gap: 18px;
            }
        }
        .download-card {
            padding: 28px 26px;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            backdrop-filter: blur(6px);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            position: relative;
            overflow: hidden;
            cursor: default;
        }
        .download-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background: var(--gradient-glow);
            opacity: 0;
            transition: opacity 0.5s ease;
            border-radius: var(--radius-lg);
        }
        .download-card:hover {
            transform: translateY(-5px);
            border-color: rgba(6, 182, 212, 0.14);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .download-card:hover::before {
            opacity: 1;
        }
        .download-card .top {
            display: flex;
            align-items: center;
            gap: 15px;
            width: 100%;
            position: relative;
            z-index: 1;
            margin-bottom: 12px;
        }
        .download-card .icon {
            width: 50px;
            height: 50px;
            border-radius: var(--radius-sm);
            background: rgba(6, 182, 212, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            flex-shrink: 0;
            border: 1px solid rgba(6, 182, 212, 0.04);
            transition: all var(--transition-smooth);
        }
        .download-card:hover .icon {
            box-shadow: 0 0 28px rgba(6, 182, 212, 0.06);
        }
        .download-card .info h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 3px;
            letter-spacing: -0.2px;
        }
        .download-card .info .version {
            font-size: 12.5px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .download-card .info .version .badge {
            background: rgba(6, 182, 212, 0.07);
            color: var(--accent-cyan);
            padding: 2px 10px;
            border-radius: 50px;
            font-size: 10.5px;
            font-weight: 600;
            letter-spacing: 0.2px;
        }
        .download-card .desc {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 4px 0 16px;
            position: relative;
            z-index: 1;
            flex-grow: 1;
        }
        .download-card .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 26px;
            border-radius: var(--radius-sm);
            background: var(--gradient-main);
            color: #fff;
            font-size: 13.5px;
            font-weight: 600;
            text-decoration: none;
            border: none;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 28px rgba(6, 182, 212, 0.13);
            position: relative;
            z-index: 1;
            margin-top: auto;
            letter-spacing: 0.1px;
        }
        .download-card .btn-download:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 48px rgba(6, 182, 212, 0.28);
        }
        .download-card .btn-download.outline {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            box-shadow: none;
            color: var(--text-primary);
        }
        .download-card .btn-download.outline:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(255, 255, 255, 0.14);
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
        }
        /* 平台图标颜色微调 */
        .download-card.windows .icon {
            background: rgba(6, 182, 212, 0.07);
            border-color: rgba(6, 182, 212, 0.07);
        }
        .download-card.windows:hover .icon {
            background: rgba(6, 182, 212, 0.14);
        }
        .download-card.macos .icon {
            background: rgba(52, 211, 153, 0.07);
            border-color: rgba(52, 211, 153, 0.07);
        }
        .download-card.macos:hover .icon {
            background: rgba(52, 211, 153, 0.14);
        }
        .download-card.ios .icon {
            background: rgba(139, 92, 246, 0.07);
            border-color: rgba(139, 92, 246, 0.07);
        }
        .download-card.ios:hover .icon {
            background: rgba(139, 92, 246, 0.14);
        }
        .download-card.android .icon {
            background: rgba(59, 130, 246, 0.07);
            border-color: rgba(59, 130, 246, 0.07);
        }
        .download-card.android:hover .icon {
            background: rgba(59, 130, 246, 0.14);
        }

        /* ========== 三步安装指南 ========== */
        .install-guide {
            padding: 40px 0 80px;
            position: relative;
        }
        .install-guide::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 50%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(6, 182, 212, 0.14), transparent);
        }
        .section-heading-center {
            text-align: center;
            margin-bottom: 36px;
        }
        .section-heading-center .section-label {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 2.8px;
            color: var(--accent-cyan);
            background: rgba(6, 182, 212, 0.06);
            padding: 4px 16px;
            border-radius: 50px;
            border: 1px solid rgba(6, 182, 212, 0.06);
            margin-bottom: 12px;
        }
        .section-heading-center h2 {
            font-size: clamp(24px, 3vw, 38px);
            font-weight: 700;
            letter-spacing: -0.5px;
            line-height: 1.12;
            margin-bottom: 6px;
        }
        .section-heading-center h2 .highlight {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-heading-center .subtitle {
            color: var(--text-secondary);
            font-size: 14px;
            max-width: 480px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            max-width: 900px;
            margin: 0 auto;
            position: relative;
        }
        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: 1fr;
                max-width: 380px;
                gap: 16px;
            }
        }
        .step-card {
            padding: 28px 22px;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            transition: all var(--transition-smooth);
            text-align: center;
            position: relative;
            cursor: default;
        }
        .step-card:hover {
            transform: translateY(-4px);
            border-color: rgba(6, 182, 212, 0.12);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .step-card .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--gradient-main);
            color: #fff;
            font-size: 17px;
            font-weight: 800;
            margin-bottom: 12px;
            box-shadow: 0 0 30px rgba(6, 182, 212, 0.16);
        }
        .step-card .step-icon {
            font-size: 36px;
            margin-bottom: 8px;
            display: block;
        }
        .step-card h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
            letter-spacing: -0.1px;
        }
        .step-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.55;
        }

        /* ========== 系统要求对比 ========== */
        .sys-req {
            padding: 30px 0 80px;
            position: relative;
        }
        .sys-req-table-wrap {
            max-width: 960px;
            margin: 0 auto;
            border-radius: var(--radius-xl);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }
        .sys-req-table-wrap:hover {
            border-color: rgba(6, 182, 212, 0.08);
            box-shadow: var(--shadow-glow);
        }
        .sys-req-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 13.5px;
        }
        .sys-req-table thead th {
            padding: 18px 16px;
            text-align: center;
            font-weight: 700;
            font-size: 14px;
            letter-spacing: -0.1px;
            background: rgba(6, 182, 212, 0.04);
            border-bottom: 1px solid var(--border-glass);
            color: var(--text-primary);
        }
        .sys-req-table thead th:first-child {
            text-align: left;
            padding-left: 24px;
            color: var(--accent-cyan);
        }
        .sys-req-table tbody td {
            padding: 13px 16px;
            text-align: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.03);
            color: var(--text-secondary);
            vertical-align: middle;
        }
        .sys-req-table tbody td:first-child {
            text-align: left;
            padding-left: 24px;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: -0.05px;
        }
        .sys-req-table tbody tr:last-child td {
            border-bottom: none;
        }
        .sys-req-table tbody tr:hover td {
            background: rgba(255, 255, 255, 0.015);
        }
        .sys-req-table .check-icon {
            color: var(--accent-teal);
            font-weight: 700;
        }
        @media (max-width: 768px) {
            .sys-req-table-wrap {
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
            }
            .sys-req-table {
                min-width: 600px;
                font-size: 12.5px;
            }
            .sys-req-table thead th,
            .sys-req-table tbody td {
                padding: 10px 10px;
            }
        }

        /* ========== 版本亮点 ========== */
        .version-highlights {
            padding: 30px 0 80px;
            position: relative;
        }
        .highlights-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            max-width: 900px;
            margin: 0 auto;
        }
        @media (max-width: 720px) {
            .highlights-grid {
                grid-template-columns: 1fr;
                max-width: 400px;
                gap: 14px;
            }
        }
        .highlight-item {
            padding: 22px 20px;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            transition: all var(--transition-smooth);
            display: flex;
            align-items: flex-start;
            gap: 14px;
            cursor: default;
        }
        .highlight-item:hover {
            transform: translateY(-3px);
            border-color: rgba(6, 182, 212, 0.1);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .highlight-item .hl-icon {
            font-size: 28px;
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: rgba(6, 182, 212, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(6, 182, 212, 0.04);
        }
        .highlight-item .hl-text h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 3px;
            letter-spacing: -0.1px;
        }
        .highlight-item .hl-text p {
            font-size: 12.5px;
            color: var(--text-secondary);
            line-height: 1.55;
        }
        .highlight-item .hl-text .hl-tag {
            display: inline-block;
            padding: 2px 10px;
            border-radius: 50px;
            font-size: 10px;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-top: 6px;
            background: rgba(6, 182, 212, 0.07);
            color: var(--accent-cyan);
            border: 1px solid rgba(6, 182, 212, 0.06);
        }

        /* ========== 下载统计 ========== */
        .download-stats-section {
            padding: 30px 0 70px;
            position: relative;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            max-width: 900px;
            margin: 0 auto;
        }
        @media (max-width: 720px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
        }
        @media (max-width: 420px) {
            .stats-grid {
                grid-template-columns: 1fr;
                max-width: 280px;
            }
        }
        .stat-card {
            padding: 24px 18px;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            transition: all var(--transition-smooth);
            text-align: center;
            cursor: default;
        }
        .stat-card:hover {
            transform: translateY(-3px);
            border-color: rgba(6, 182, 212, 0.1);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .stat-card .stat-num {
            font-size: clamp(28px, 3vw, 40px);
            font-weight: 800;
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
            letter-spacing: -1px;
            margin-bottom: 4px;
        }
        .stat-card .stat-label {
            font-size: 12.5px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ========== 兼容性条 ========== */
        .compat {
            padding: 20px 0 60px;
        }
        .compat-wrap {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 28px 45px;
            padding: 26px 20px;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            transition: all var(--transition-smooth);
        }
        .compat-wrap:hover {
            border-color: rgba(6, 182, 212, 0.07);
            box-shadow: var(--shadow-glow);
        }
        .compat-item {
            display: flex;
            align-items: center;
            gap: 9px;
            font-size: 13.5px;
            color: var(--text-secondary);
        }
        .compat-item .icon-sm {
            font-size: 19px;
        }
        .compat-item strong {
            color: var(--text-primary);
            font-weight: 600;
        }

        /* ========== 信任认证 ========== */
        .trust {
            padding: 20px 0 70px;
        }
        .trust-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
            padding: 26px 34px;
            border-radius: var(--radius-xl);
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            transition: all var(--transition-smooth);
        }
        .trust-wrap:hover {
            border-color: rgba(6, 182, 212, 0.07);
            box-shadow: var(--shadow-glow);
        }
        .trust-left {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .trust-left .badge-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: var(--gradient-main);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            font-weight: 700;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 0 36px rgba(6, 182, 212, 0.14);
        }
        .trust-left .text h4 {
            font-size: 16px;
            font-weight: 600;
            letter-spacing: -0.1px;
        }
        .trust-left .text p {
            font-size: 12.5px;
            color: var(--text-secondary);
        }
        .trust-right {
            display: flex;
            gap: 9px;
            flex-wrap: wrap;
        }
        .trust-right .tag {
            padding: 5px 14px;
            border-radius: 50px;
            font-size: 11.5px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.025);
            border: 1px solid var(--border-glass);
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }
        .trust-right .tag.verified {
            background: rgba(6, 182, 212, 0.04);
            border-color: rgba(6, 182, 212, 0.07);
            color: var(--accent-cyan);
        }
        .trust-right .tag:hover {
            border-color: rgba(255, 255, 255, 0.12);
            color: var(--text-primary);
        }
        @media (max-width: 640px) {
            .trust-wrap {
                padding: 20px 16px;
                flex-direction: column;
                align-items: flex-start;
            }
            .trust-right {
                width: 100%;
            }
        }

        /* ========== FOOTER ========== */
        footer {
            padding: 32px 0 24px;
            border-top: 1px solid var(--border-glass);
        }
        .footer-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-inner .copy {
            font-size: 12.5px;
            color: var(--text-muted);
        }
        .footer-inner .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .footer-inner .footer-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 12.5px;
            transition: color var(--transition-fast);
        }
        .footer-inner .footer-links a:hover {
            color: var(--text-primary);
        }
        @media (max-width: 600px) {
            .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            .footer-inner .footer-links {
                justify-content: center;
            }
        }

        /* ========== SCROLL TOP ========== */
        .scroll-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            color: var(--text-secondary);
            font-size: 17px;
            cursor: pointer;
            backdrop-filter: blur(10px);
            transition: all var(--transition-smooth);
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
            z-index: 50;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .scroll-top.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .scroll-top:hover {
            background: rgba(6, 182, 212, 0.07);
            border-color: rgba(6, 182, 212, 0.14);
            color: var(--accent-cyan);
            transform: translateY(-5px);
            box-shadow: 0 0 28px rgba(6, 182, 212, 0.05);
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }