:root {
            --ba-bg: #0a0e17;
            --ba-bg-soft: #0f1420;
            --ba-card: #141a29;
            --ba-card-light: #1c2333;
            --ba-card-dark: #0d111c;
            --ba-border: #1e2538;
            --ba-border-light: #2a3247;
            --ba-text: #eaecef;
            --ba-text-muted: #848e9c;
            --ba-text-light: #f5f7fa;
            --ba-yellow: #f0b90b;
            --ba-yellow-soft: #f8d12f;
            --ba-yellow-dark: #c9940a;
            --ba-red: #f84960;
            --ba-green: #02c076;
            --ba-blue: #3772ff;
            --ba-purple: #7c3aed;
            --ba-link: #f0b90b;
            --ba-radius-lg: 20px;
            --ba-radius-md: 12px;
            --ba-radius-sm: 8px;
            --ba-shadow-soft: 0 8px 24px rgba(0,0,0,0.25);
            --ba-shadow-card: 0 12px 28px rgba(0,0,0,0.35);
            --ba-shadow-elevated: 0 20px 40px rgba(0,0,0,0.4);
            --ba-gradient-primary: linear-gradient(135deg, #1c2333 0%, #141a29 100%);
            --ba-gradient-accent: linear-gradient(135deg, #f0b90b 0%, #f8d12f 100%);
            --ba-gradient-hero: linear-gradient(135deg, #0a0e17 0%, #141a29 50%, #0a0e17 100%);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft Yahei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background: var(--ba-bg);
            color: var(--ba-text);
            -webkit-font-smoothing: antialiased;
            line-height: 1.6;
            overflow-x: hidden;
            background-image: 
                radial-gradient(circle at 10% 20%, rgba(240, 185, 11, 0.05) 0%, transparent 20%),
                radial-gradient(circle at 90% 80%, rgba(55, 114, 255, 0.05) 0%, transparent 20%);
        }

        a {
            color: var(--ba-link);
            text-decoration: none;
            transition: all 0.3s ease;
        }
        a:hover {
            color: var(--ba-yellow-soft);
        }

        .ba-container {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px 80px;
        }

        /* 顶部导航 - 企业级风格 */
        .ba-header-wrap {
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(20px);
            background: rgba(10, 14, 23, 0.85);
            border-bottom: 1px solid rgba(255,255,255,0.08);
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
        }

        .ba-header {
            max-width: 1320px;
            margin: 0 auto;
            padding: 16px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .ba-logo {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .ba-logo-mark {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--ba-gradient-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 20px rgba(240, 185, 11, 0.3);
            font-size: 20px;
            font-weight: 800;
            color: #111827;
            position: relative;
            overflow: hidden;
        }
        .ba-logo-mark::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
        }

        .ba-logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .ba-logo-title {
            font-size: 22px;
            font-weight: 700;
            color: var(--ba-text-light);
            letter-spacing: -0.5px;
        }

        .ba-logo-sub {
            font-size: 12px;
            color: var(--ba-text-muted);
            letter-spacing: 0.5px;
        }

        .ba-nav {
            display: flex;
            gap: 8px;
            align-items: center;
            font-size: 15px;
        }
        .ba-nav a {
            padding: 10px 18px;
            border-radius: var(--ba-radius-sm);
            color: var(--ba-text);
            text-decoration: none;
            transition: all 0.3s ease;
            white-space: nowrap;
            font-weight: 500;
            position: relative;
        }
        .ba-nav a::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 18px;
            right: 18px;
            height: 2px;
            background: var(--ba-yellow);
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }
        .ba-nav a:hover,
        .ba-nav a.ba-nav-active {
            color: var(--ba-yellow);
            background: rgba(240, 185, 11, 0.08);
        }
        .ba-nav a:hover::after,
        .ba-nav a.ba-nav-active::after {
            transform: scaleX(1);
        }

        /* 按钮样式 - 高端设计 */
        .ba-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: var(--ba-radius-sm);
            border: none;
            font-size: 15px;
            cursor: pointer;
            background: var(--ba-gradient-accent);
            color: #0a0e17;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(240, 185, 11, 0.25);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .ba-btn::before {
            content: "";
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s ease;
        }
        .ba-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(240, 185, 11, 0.4);
        }
        .ba-btn:hover::before {
            left: 100%;
        }
        .ba-btn-outline {
            background: transparent;
            color: var(--ba-text);
            box-shadow: none;
            border: 1px solid rgba(255,255,255,0.15);
        }
        .ba-btn-outline:hover {
            background: rgba(255,255,255,0.05);
            color: var(--ba-yellow);
            border-color: var(--ba-yellow);
            transform: translateY(-2px);
        }
        .ba-btn-sm {
            padding: 10px 20px;
            font-size: 14px;
        }

        /* Font Awesome 图标样式 */
        .ba-icon {
            width: 20px;
            height: 20px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: currentColor;
        }
        .ba-icon-sm {
            width: 16px;
            height: 16px;
            font-size: 12px;
        }
        .ba-icon-lg {
            width: 24px;
            height: 24px;
            font-size: 16px;
        }

        /* 主体布局 */
        main {
            margin-top: 20px;
        }

        .ba-hero {
            display: grid;
            grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
            gap: 40px;
            margin-top: 40px;
            position: relative;
        }

        .ba-hero-left {
            background: var(--ba-gradient-primary);
            border-radius: var(--ba-radius-lg);
            padding: 40px 36px;
            box-shadow: var(--ba-shadow-elevated);
            border: 1px solid var(--ba-border-light);
            position: relative;
            overflow: hidden;
            z-index: 1;
        }
        .ba-hero-left::before {
            content: "";
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(240, 185, 11, 0.08) 0%, transparent 70%);
            z-index: -1;
        }
        .ba-hero-left::after {
            content: "";
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(55, 114, 255, 0.05) 0%, transparent 70%);
            z-index: -1;
        }

        .ba-tagline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 8px 16px;
            border-radius: 20px;
            background: rgba(240, 185, 11, 0.1);
            border: 1px solid rgba(240, 185, 11, 0.3);
            font-size: 13px;
            color: var(--ba-yellow);
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
            backdrop-filter: blur(10px);
        }
        .ba-tagline-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--ba-green);
            box-shadow: 0 0 0 4px rgba(2, 192, 118, 0.2);
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(2, 192, 118, 0.4); }
            70% { box-shadow: 0 0 0 8px rgba(2, 192, 118, 0); }
            100% { box-shadow: 0 0 0 0 rgba(2, 192, 118, 0); }
        }

        .ba-hero-title {
            font-size: 42px;
            font-weight: 700;
            margin: 12px 0 16px;
            line-height: 1.2;
            position: relative;
            z-index: 1;
            letter-spacing: -0.5px;
        }
        .ba-hero-title span {
            background: linear-gradient(90deg, var(--ba-yellow), var(--ba-yellow-soft));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            position: relative;
        }
        .ba-hero-title span::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--ba-gradient-accent);
            transform: scaleX(0.8);
            transform-origin: left;
        }

        .ba-hero-sub {
            font-size: 18px;
            color: var(--ba-text-muted);
            line-height: 1.7;
            margin-bottom: 32px;
            position: relative;
            z-index: 1;
        }

        .ba-hero-download {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }

        .ba-hero-download .ba-btn {
            flex: 1;
            min-width: 180px;
        }

        .ba-hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 24px;
            position: relative;

            z-index: 1;
        }
        .ba-hero-meta-item {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 8px 16px;
            border-radius: 20px;
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            font-size: 13px;
            color: var(--ba-text-muted);
            backdrop-filter: blur(10px);
        }

        .ba-risk-tip {
            padding: 18px 20px;
            border-radius: var(--ba-radius-md);
            background: rgba(248, 73, 96, 0.1);
            border: 1px solid rgba(248, 73, 96, 0.3);
            font-size: 14px;
            color: #fecaca;
            position: relative;
            z-index: 1;
            backdrop-filter: blur(10px);
        }
        .ba-risk-tip strong {
            color: #fee2e2;
        }

        .ba-hero-right {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .ba-phone-mockup {
            width: 100%;
            max-width: 340px;
            border-radius: 42px;
            padding: 18px;
            background: linear-gradient(145deg, #1c2333, #141a29);
            border: 1px solid rgba(255,255,255,0.1);
            box-shadow: 
                0 20px 40px rgba(0,0,0,0.4),
                inset 0 1px 0 rgba(255,255,255,0.1);
            position: relative;
            z-index: 1;
        }
        .ba-phone-mockup::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 30px;
            background: rgba(0,0,0,0.3);
            border-radius: 42px 42px 0 0;
            z-index: 1;
        }
        .ba-phone-inner {
            border-radius: 32px;
            overflow: hidden;
            background: var(--ba-card-light);
            border: 1px solid rgba(255,255,255,0.08);
            position: relative;
            z-index: 2;
        }
        .ba-phone-screen {
            padding: 24px 20px;
            background: linear-gradient(135deg, #1c2333, #141a29);
            position: relative;
        }
        .ba-phone-screen::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: 
                radial-gradient(circle at 20% 80%, rgba(240, 185, 11, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(55, 114, 255, 0.05) 0%, transparent 50%);
            z-index: 0;
        }
        .ba-phone-logo {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: var(--ba-gradient-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            font-weight: 800;
            color: #0a0e17;
            font-size: 26px;
            position: relative;
            z-index: 1;
            box-shadow: 0 8px 16px rgba(240, 185, 11, 0.3);
        }
        .ba-phone-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 6px;
            position: relative;
            z-index: 1;
        }
        .ba-phone-sub {
            font-size: 13px;
            color: var(--ba-text-muted);
            margin-bottom: 16px;
            line-height: 1.5;
            position: relative;
            z-index: 1;
        }
        .ba-phone-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }
        .ba-phone-tags span {
            font-size: 11px;
            padding: 6px 10px;
            border-radius: 14px;
            background: rgba(240, 185, 11, 0.1);
            color: var(--ba-yellow);
            border: 1px solid rgba(240, 185, 11, 0.2);
        }

        .ba-phone-card {
            margin-top: 16px;
            padding: 16px;
            border-radius: var(--ba-radius-md);
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.08);
            font-size: 12px;
            position: relative;
            z-index: 1;
            backdrop-filter: blur(10px);
        }
        .ba-phone-card strong {
            color: var(--ba-text);
        }
        .ba-phone-card p {
            margin-top: 6px;
            color: var(--ba-text-muted);
            line-height: 1.5;
        }
        .ba-phone-cta {
            margin-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            position: relative;
            z-index: 1;
        }
        .ba-phone-cta a {
            flex: 1;
            font-size: 13px;
            text-align: center;
            padding: 10px 16px;
            border-radius: var(--ba-radius-sm);
            border: 1px solid rgba(255,255,255,0.15);
            text-decoration: none;
            transition: all 0.3s ease;
            color: var(--ba-text);
        }
        .ba-phone-cta a.ba-phone-cta-main {
            background: var(--ba-yellow);
            color: #0a0e17;
            border-color: transparent;
            font-weight: 600;
        }
        .ba-phone-cta a:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.2);
        }

        /* 模块通用 */
        .ba-section {
            margin-top: 60px;
        }

        .ba-section-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            gap: 20px;
            margin-bottom: 28px;
        }
        .ba-section-title {
            font-size: 32px;
            font-weight: 700;
            letter-spacing: -0.5px;
        }
        .ba-section-sub {
            font-size: 18px;
            color: var(--ba-text-muted);
        }

        .ba-card {
            background: var(--ba-gradient-primary);
            border-radius: var(--ba-radius-lg);
            border: 1px solid var(--ba-border-light);
            padding: 32px;
            box-shadow: var(--ba-shadow-soft);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .ba-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: var(--ba-gradient-accent);
            transform: scaleX(0);
            transition: transform 0.5s ease;
        }
        .ba-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--ba-shadow-elevated);
        }
        .ba-card:hover::before {
            transform: scaleX(1);
        }

        /* 多端下载表格 */
        .ba-download-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
            gap: 32px;
        }

        .ba-table-container {
            overflow-x: auto;
            margin-bottom: 20px;
            border-radius: var(--ba-radius-md);
            border: 1px solid var(--ba-border);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }

        .ba-download-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 15px;
            min-width: 600px;
        }
        .ba-download-table th,
        .ba-download-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--ba-border);
            text-align: left;
        }
        .ba-download-table th {
            font-weight: 600;
            color: var(--ba-text-muted);
            background: rgba(255,255,255,0.03);
        }
        .ba-download-table tr:last-child td {
            border-bottom: none;
        }
        .ba-download-table tr:hover td {
            background: rgba(255,255,255,0.02);
        }
        .ba-download-table td.ba-col-platform {
            font-weight: 600;
        }
        .ba-tag {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
        }
        .ba-tag-android {
            background: rgba(61, 220, 132, 0.15);
            color: #3DDC84;
            border: 1px solid rgba(61, 220, 132, 0.3);
        }
        .ba-tag-ios {
            background: rgba(0, 0, 0, 0.15);
            color: #000;
            border: 1px solid rgba(0, 0, 0, 0.3);
        }
        .ba-tag-desktop {
            background: rgba(0, 120, 215, 0.15);
            color: #0078D7;
            border: 1px solid rgba(0, 120, 215, 0.3);
        }

        .ba-link-download {
            font-size: 14px;
            padding: 10px 18px;
            border-radius: var(--ba-radius-sm);
            background: rgba(240, 185, 11, 0.1);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
            transition: all 0.3s ease;
            color: var(--ba-yellow);
            border: 1px solid rgba(240, 185, 11, 0.2);
        }
        .ba-link-download:hover {
            background: rgba(240, 185, 11, 0.2);
            text-decoration: none;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(240, 185, 11, 0.2);
        }

        .ba-note {
            font-size: 14px;
            color: var(--ba-text-muted);
            margin-top: 16px;
            line-height: 1.6;
        }

        /* 安装教程 */
        .ba-tutorial-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 28px;
        }
        .ba-step {
            border-radius: var(--ba-radius-md);
            background: var(--ba-card-light);
            border: 1px solid var(--ba-border);
            padding: 28px 24px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
            position: relative;
            overflow: hidden;
        }
        .ba-step::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--ba-gradient-accent);
            transform: scaleX(0);
            transition: transform 0.5s ease;
        }
        .ba-step:hover {
            transform: translateY(-6px);
            box-shadow: var(--ba-shadow-elevated);
        }
        .ba-step:hover::before {
            transform: scaleX(1);
        }
        .ba-step-title {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .ba-step-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            padding: 8px 16px;
            border-radius: 20px;
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            margin-bottom: 16px;
            color: var(--ba-text);
        }

        .ba-step ul {
            margin: 0;
            padding-left: 24px;
            list-style: decimal;
            flex-grow: 1;
        }
        .ba-step li {
            margin-bottom: 12px;
            line-height: 1.6;
            color: var(--ba-text-muted);
        }
        .ba-step li strong {
            color: var(--ba-text);
        }

        /* 功能+风险+FAQ+公告 */
        .ba-3col-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
            gap: 32px;
        }

        .ba-feature-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .ba-feature-list li {
            display: flex;
            gap: 16px;
            margin-bottom: 20px;
            padding: 20px;
            border-radius: var(--ba-radius-md);
            background: rgba(255,255,255,0.03);
            border: 1px solid rgba(255,255,255,0.05);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .ba-feature-list li::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--ba-gradient-accent);
            transform: scaleY(0);
            transition: transform 0.3s ease;
        }
        .ba-feature-list li:hover {
            background: rgba(255,255,255,0.05);
            border-color: rgba(255,255,255,0.1);
            transform: translateY(-4px);
        }
        .ba-feature-list li:hover::before {
            transform: scaleY(1);
        }
        .ba-feature-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--ba-yellow);
            margin-top: 10px;
            flex-shrink: 0;
        }
        .ba-feature-content {
            flex: 1;
        }
        .ba-feature-content strong {
            display: block;
            margin-bottom: 6px;
            color: var(--ba-text);
            font-size: 16px;
        }
        .ba-feature-content span {
            color: var(--ba-text-muted);
            font-size: 14px;
            line-height: 1.6;
        }

        .ba-warning-list {
            list-style: none;
            margin: 0 0 24px 0;
            padding-left: 0;
        }
        .ba-warning-list li {
            margin-bottom: 16px;
            padding-left: 32px;
            position: relative;
            color: var(--ba-text-muted);
            line-height: 1.6;
        }
        .ba-warning-list li::before {
            content: "⚠";
            position: absolute;
            left: 0;
            top: 2px;
            width: 20px;
            height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--ba-yellow);
        }
        .ba-warning-list li strong {
            color: var(--ba-text);
        }

        details.ba-faq-item {
            border-radius: var(--ba-radius-md);
            background: var(--ba-card-light);
            border: 1px solid var(--ba-border);
            padding: 20px;
            margin-bottom: 16px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        details.ba-faq-item::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--ba-gradient-accent);
            transform: scaleY(0);
            transition: transform 0.3s ease;
        }
        details.ba-faq-item:hover {
            border-color: rgba(240, 185, 11, 0.3);
        }
        details.ba-faq-item[open] {
            background: rgba(240, 185, 11, 0.05);
            border-color: rgba(240, 185, 11, 0.3);
        }
        details.ba-faq-item[open]::before {
            transform: scaleY(1);
        }
        details.ba-faq-item summary {
            cursor: pointer;
            list-style: none;
            padding: 4px 0;
            font-weight: 600;
            color: var(--ba-text);
            font-size: 16px;
        }
        details.ba-faq-item summary::-webkit-details-marker {
            display: none;
        }
        details.ba-faq-item summary::after {
            content: "＋";
            float: right;
            color: var(--ba-yellow);
            font-size: 20px;
            transition: transform 0.3s ease;
        }
        details.ba-faq-item[open] summary::after {
            content: "－";
        }
        details.ba-faq-item p {
            margin: 16px 0 4px;
            color: var(--ba-text-muted);
            line-height: 1.6;
            font-size: 14px;
        }

        .ba-ann-list {
            list-style: none;
            margin: 0;
            padding-left: 0;
        }
        .ba-ann-list li {
            padding: 16px 0;
            border-bottom: 1px solid var(--ba-border);
            display: flex;
            justify-content: space-between;
            gap: 20px;
            transition: background-color 0.3s ease;
        }
        .ba-ann-list li:hover {
            background-color: rgba(255,255,255,0.03);
            border-radius: var(--ba-radius-sm);
            padding-left: 16px;
            padding-right: 16px;
        }
        .ba-ann-list li:last-child {
            border-bottom: none;
        }
        .ba-ann-title {
            color: var(--ba-text);
            font-weight: 500;
        }
        .ba-ann-date {
            color: var(--ba-text-muted);
            white-space: nowrap;
            font-size: 13px;
        }

        /* 版本历史 */
        .ba-history-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 15px;
        }
        .ba-history-table th,
        .ba-history-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--ba-border);
            text-align: left;
        }
        .ba-history-table th {
            color: var(--ba-text-muted);
            font-weight: 600;
            background: rgba(255,255,255,0.03);
        }
        .ba-history-table tr:last-child td {
            border-bottom: none;
        }
        .ba-history-table tr:hover td {
            background: rgba(255,255,255,0.02);
        }
        .ba-history-version {
            font-weight: 600;
        }
        .ba-history-tag {
            display: inline-block;
            padding: 6px 12px;
            border-radius: 20px;
            background: rgba(2, 192, 118, 0.15);
            color: var(--ba-green);
            border: 1px solid rgba(2, 192, 118, 0.3);
            font-size: 13px;
            font-weight: 600;
        }

        /* 页脚 */
        footer {
            border-top: 1px solid var(--ba-border);
            margin-top: 60px;
            padding-top: 32px;
            font-size: 14px;
            color: var(--ba-text-muted);
        }

        .ba-footer-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .ba-footer-links a {
            margin-right: 20px;
            font-size: 14px;
            color: var(--ba-text-muted);
            transition: color 0.3s ease;
        }
        .ba-footer-links a:hover {
            color: var(--ba-yellow);
        }

        /* 底部悬浮App下载导航广告 */
        .ba-app-download-ad {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: var(--ba-card);
            border-top: 1px solid var(--ba-border-light);
            padding: 20px 24px;
            box-shadow: 0 -4px 20px rgba(0,0,0,0.5);
            transform: translateY(0);
            transition: transform 0.3s ease;
        }
        
        .ba-app-download-ad.hidden {
            transform: translateY(100%);
        }
        
        .ba-app-download-content {
            max-width: 1320px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        
        .ba-app-download-left {
            display: flex;
            align-items: center;
            gap: 20px;
            flex: 1;
        }
        
        .ba-app-download-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: var(--ba-gradient-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            color: #0a0e17;
            font-size: 22px;
            box-shadow: 0 8px 16px rgba(240, 185, 11, 0.3);
        }
        
        .ba-app-download-text {
            flex: 1;
        }
        
        .ba-app-download-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        
        .ba-app-download-subtitle {
            font-size: 14px;
            color: var(--ba-text-muted);
        }
        
        .ba-app-download-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        
        .ba-app-download-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--ba-radius-sm);
            background: var(--ba-yellow);
            color: #0a0e17;
            font-size: 14px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        .ba-app-download-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(240, 185, 11, 0.4);
            background: var(--ba-yellow-soft);
            text-decoration: none;
        }
        
        .ba-app-download-btn-outline {
            background: transparent;
            color: var(--ba-text);
            border: 1px solid rgba(255,255,255,0.15);
        }
        
        .ba-app-download-btn-outline:hover {
            background: rgba(255,255,255,0.05);
            color: var(--ba-yellow);
            border-color: var(--ba-yellow);
            transform: translateY(-2px);
        }
        
        .ba-app-download-close {
            background: transparent;
            border: none;
            color: var(--ba-text-muted);
            cursor: pointer;
            padding: 8px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }
        
        .ba-app-download-close:hover {
            background: rgba(255,255,255,0.05);
            color: var(--ba-text);
        }

        /* 响应式优化 */
        @media (max-width: 1200px) {
            .ba-hero {
                gap: 32px;
            }
            
            .ba-download-grid,
            .ba-3col-grid {
                gap: 28px;
            }
            
            .ba-tutorial-grid {
                gap: 24px;
            }
        }

        @media (max-width: 1024px) {
            .ba-header {
                flex-wrap: wrap;
            }
            .ba-nav {
                order: 3;
                width: 100%;
                overflow-x: auto;
                padding-bottom: 8px;
                margin-top: 16px;
            }
            .ba-nav a {
                padding: 8px 16px;
                font-size: 14px;
            }

            .ba-hero {
                grid-template-columns: minmax(0, 1fr);
                gap: 32px;
            }

            .ba-hero-right {
                order: -1;
                max-width: 360px;
                margin: 0 auto;
            }

            .ba-download-grid,
            .ba-3col-grid {
                grid-template-columns: minmax(0, 1fr);
            }

            .ba-tutorial-grid {
                grid-template-columns: minmax(0, 1fr);
                gap: 24px;
            }

            .ba-container {
                padding-bottom: 100px;
            }
            
            .ba-section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            
            .ba-hero-left {
                padding: 32px 28px;
            }
            
            /* 移动端底部广告样式 */
            .ba-app-download-content {
                flex-direction: column;
                align-items: flex-start;
                gap: 20px;
            }
            
            .ba-app-download-left {
                width: 100%;
            }
            
            .ba-app-download-right {
                width: 100%;
                justify-content: space-between;
            }
            
            .ba-app-download-btn {
                flex: 1;
                justify-content: center;
            }
        }

        @media (max-width: 768px) {
            .ba-hero-title {
                font-size: 36px;
            }
            
            .ba-hero-sub {
                font-size: 16px;
            }
            
            .ba-hero-download {
                flex-direction: column;
            }
            
            .ba-hero-download .ba-btn {
                flex: 1 1 auto;
            }
            
            .ba-hero-meta {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .ba-3col-grid {
                gap: 28px;
            }
            
            .ba-card {
                padding: 28px 24px;
            }
            
            .ba-section-title {
                font-size: 28px;
            }
            
            .ba-section-sub {
                font-size: 16px;
            }
            
            .ba-step {
                padding: 24px 20px;
            }
        }

        @media (max-width: 640px) {
            .ba-hero-title {
                font-size: 32px;
            }
            .ba-hero-left {
                padding: 28px 24px;
            }
            .ba-header {
                padding-inline: 20px;
            }
            
            .ba-logo-title {
                font-size: 20px;
            }
            
            .ba-logo-sub {
                font-size: 11px;
            }
            
            .ba-btn {
                padding: 12px 24px;
                font-size: 14px;
            }
            
            .ba-table-container {
                margin-left: -20px;
                margin-right: -20px;
                padding-left: 20px;
                padding-right: 20px;
            }
            
            .ba-section {
                margin-top: 48px;
            }
            
            .ba-phone-mockup {
                max-width: 320px;
            }
            
            .ba-feature-list li {
                padding: 16px;
            }
        }
        
        @media (max-width: 480px) {
            .ba-hero-title {
                font-size: 28px;
            }
            
            .ba-hero-left {
                padding: 24px 20px;
            }
            
            .ba-container {
                padding-left: 20px;
                padding-right: 20px;
            }
            
            .ba-card {
                padding: 24px 20px;
            }
            
            .ba-step {
                padding: 20px 16px;
            }
            
            .ba-app-download-btn {
                padding: 10px 20px;
                font-size: 13px;
            }
            
            .ba-feature-list li {
                padding: 16px 12px;
            }
        }
        
        @media (max-width: 360px) {
            .ba-hero-title {
                font-size: 26px;
            }
            
            .ba-hero-sub {
                font-size: 15px;
            }
            
            .ba-phone-mockup {
                max-width: 300px;
            }
        }

        /* 加载动画 */
        .ba-loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 2px solid rgba(240, 185, 11, 0.3);
            border-radius: 50%;
            border-top-color: var(--ba-yellow);
            animation: spin 1s ease-in-out infinite;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        
        /* 触摸优化 */
        @media (hover: none) {
            .ba-btn:hover {
                transform: none;
            }
            
            .ba-step:hover {
                transform: none;
            }
            
            .ba-link-download:hover {
                background: rgba(240, 185, 11, 0.1);
                transform: none;
                box-shadow: none;
            }
            
            .ba-phone-cta a:hover {
                transform: none;
            }
            
            .ba-ann-list li:hover {
                background-color: transparent;
                padding-left: 0;
                padding-right: 0;
            }
            
            details.ba-faq-item:hover {
                border-color: var(--ba-border);
            }
            
            .ba-app-download-btn:hover {
                transform: none;
                box-shadow: none;
                background: var(--ba-yellow);
            }
            
            .ba-feature-list li:hover {
                background: rgba(255,255,255,0.03);
                border-color: rgba(255,255,255,0.05);
                transform: none;
            }
            
            .ba-card:hover {
                transform: none;
            }
        }
        
        #screenshots {
    margin-top: 60px;
}

.ba-screenshot-nav {
    display: flex;
    gap: 12px;
}

.ba-screenshot-nav-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--ba-card-light);
    border: 1px solid var(--ba-border);
    color: var(--ba-text);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.ba-screenshot-nav-btn:hover {
    background: var(--ba-yellow);
    color: #0a0e17;
    border-color: var(--ba-yellow);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(240, 185, 11, 0.3);
}

.ba-screenshot-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.ba-screenshot-viewer {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 500px;
    overflow: hidden;
    border-radius: var(--ba-radius-md);
    background: var(--ba-card-light);
    padding: 40px 20px;
}

.ba-screenshot-slide {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    width: 100%;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.ba-screenshot-slide.active {
    display: flex;
    opacity: 1;
}

.ba-screenshot-device {
    position: relative;
    max-width: 300px;
    width: 100%;
}

.ba-screenshot-frame {
    position: relative;
    border-radius: 24px;
    padding: 12px;
    background: linear-gradient(145deg, #1c2333, #141a29);
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 
        0 20px 40px rgba(0,0,0,0.4),
        inset 0 1px 0 rgba(255,255,255,0.1);
}

.ba-screenshot-screen {
    border-radius: 16px;
    overflow: hidden;
    background: var(--ba-card);
    border: 1px solid rgba(255,255,255,0.08);
}

.ba-screenshot-img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
}

.ba-screenshot-caption {
    text-align: center;
    max-width: 400px;
}

.ba-screenshot-caption h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--ba-text);
}

.ba-screenshot-caption p {
    font-size: 15px;
    color: var(--ba-text-muted);
    line-height: 1.6;
}

.ba-screenshot-thumbnails {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.ba-screenshot-thumb {
    width: 80px;
    height: 160px;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    opacity: 0.6;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
}

.ba-screenshot-thumb:hover {
    opacity: 0.8;
    transform: translateY(-4px);
}

.ba-screenshot-thumb.active {
    opacity: 1;
    border-color: var(--ba-yellow);
    box-shadow: 0 8px 20px rgba(240, 185, 11, 0.3);
}

.ba-screenshot-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .ba-screenshot-viewer {
        min-height: 400px;
        padding: 30px 15px;
    }
    
    .ba-screenshot-device {
        max-width: 250px;
    }
    
    .ba-screenshot-caption h3 {
        font-size: 18px;
    }
    
    .ba-screenshot-caption p {
        font-size: 14px;
    }
    
    .ba-screenshot-thumb {
        width: 60px;
        height: 120px;
    }
    
    .ba-screenshot-nav {
        display: none; /* 在移动端隐藏导航按钮，使用触摸滑动 */
    }
}

@media (max-width: 480px) {
    .ba-screenshot-viewer {
        min-height: 350px;
        padding: 20px 10px;
    }
    
    .ba-screenshot-device {
        max-width: 220px;
    }
    
    .ba-screenshot-thumb {
        width: 50px;
        height: 100px;
    }
    
    .ba-screenshot-thumbnails {
        gap: 12px;
    }
}

/* 截图轮播动画 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.ba-screenshot-slide.active {
    animation: fadeIn 0.5s ease;
}