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

        body {
            font-family: 'Inter', system-ui, -apple-system, 'BlinkMacSystemFont', 'Segoe UI', Roboto, Helvetica, sans-serif;
            background: #FDF9F2;
            color: #2F3E46;
            line-height: 1.5;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 28px;
        }

        .header {
            background: rgba(253, 249, 242, 0.96);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid #F0E2D0;
        }

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 18px 0;
            gap: 20px;
        }

        .logo {
            font-size: 2rem;
            font-weight: 750;
            background: linear-gradient(125deg, #8FAA80, #C49A6C);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            letter-spacing: -0.5px;
            text-decoration: none;
        }

        .nav-links {
            display: flex;
            gap: 34px;
            align-items: center;
            flex-wrap: wrap;
        }

        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #5A6E5A;
            transition: 0.2s;
            font-size: 1rem;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: #C49A6C;
        }

        .page-hero {
            padding: 56px 0 40px;
            text-align: center;
            background: #FDF9F2;
        }

        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #4A6A3F;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }

        .page-hero .accent-text {
            background: linear-gradient(125deg, #C49A6C, #E2BB88);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
        }

        .page-hero p {
            font-size: 1.1rem;
            color: #6F7D6A;
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.6;
        }

        /* 版本切换标签 */
        .version-tabs {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin: 32px 0 48px;
            flex-wrap: wrap;
        }

        .version-tab {
            background: #FFFDF8;
            border: 1px solid #EADFCB;
            padding: 12px 28px;
            border-radius: 60px;
            font-weight: 600;
            color: #5A6E5A;
            cursor: pointer;
            transition: all 0.25s;
            text-decoration: none;
            display: inline-block;
        }

        .version-tab.active-tab,
        .version-tab:hover {
            background: #8FAA80;
            color: #fff;
            border-color: #8FAA80;
            box-shadow: 0 6px 14px rgba(143, 170, 128, 0.2);
        }

        /* 下载卡片网格 */
        .download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
            margin-bottom: 56px;
        }

        .download-card {
            background: #FFFEFB;
            border-radius: 32px;
            padding: 32px 24px;
            border: 1px solid #F0E4D2;
            transition: all 0.3s;
            text-align: center;
            position: relative;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .download-card:hover {
            transform: translateY(-6px);
            border-color: #DCC8AA;
            box-shadow: 0 18px 36px -14px rgba(0, 0, 0, 0.08);
        }

        .platform-icon {
            width: 64px;
            height: 64px;
            background: #F5EDE2;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 1.8rem;
        }

        .download-card h3 {
            font-size: 1.4rem;
            color: #4A6A3F;
            margin-bottom: 6px;
        }

        .download-card .arch-tag {
            font-size: 0.8rem;
            background: #F0EADB;
            color: #7B6B56;
            padding: 4px 14px;
            border-radius: 30px;
            display: inline-block;
            margin: 8px 0 14px;
        }

        .download-card .desc {
            font-size: 0.9rem;
            color: #7E8D78;
            margin-bottom: 20px;
            line-height: 1.5;
            flex: 1;
        }

        .btn-download {
            background: #8FAA80;
            color: white;
            padding: 10px 28px;
            border-radius: 60px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.25s;
            box-shadow: 0 6px 14px rgba(143, 170, 128, 0.2);
            display: inline-block;
            margin-top: auto;
        }

        .btn-download:hover {
            background: #7A966A;
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            color: #C49A6C;
            border: 1.5px solid #E2D0B6;
            padding: 8px 22px;
            border-radius: 60px;
            text-decoration: none;
            font-weight: 600;
            transition: 0.25s;
            display: inline-block;
            font-size: 0.9rem;
            margin-top: 6px;
        }

        .btn-outline:hover {
            background: #FFF5E8;
            border-color: #C49A6C;
        }

        /* 安装教程手风琴 */
        .install-section {
            padding: 56px 0;
            background: #FFFFFF;
            border-top: 1px solid #F0E2D0;
        }

        .section-title {
            text-align: center;
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 40px;
            color: #4A6A3F;
            letter-spacing: -0.3px;
        }

        .accordion {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .accordion-item {
            background: #FFFDF8;
            border-radius: 24px;
            border: 1px solid #F0E4D2;
            overflow: hidden;
            transition: 0.2s;
        }

        .accordion-item[open] {
            border-color: #DCC8AA;
            box-shadow: 0 6px 18px -8px rgba(0, 0, 0, 0.05);
        }

        .accordion-summary {
            padding: 20px 28px;
            font-weight: 650;
            font-size: 1.15rem;
            color: #4A6A3F;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 12px;
            list-style: none;
            background: #FFFEFB;
            transition: 0.15s;
        }

        .accordion-summary::-webkit-details-marker {
            display: none;
        }

        .accordion-summary::before {
            content: '+';
            font-size: 1.4rem;
            color: #C49A6C;
            font-weight: 600;
            width: 28px;
            text-align: center;
            transition: 0.3s;
        }

        .accordion-item[open] .accordion-summary::before {
            content: '−';
        }

        .accordion-content {
            padding: 0 28px 24px 28px;
            color: #5A6E5A;
            line-height: 1.7;
        }

        .accordion-content ol {
            padding-left: 22px;
            margin: 8px 0;
        }

        .accordion-content li {
            margin-bottom: 10px;
        }

        /* 常见问题 */
        .faq-section {
            padding: 64px 0;
            background: #FDF9F2;
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: #FFFDF8;
            border-radius: 20px;
            padding: 22px 26px;
            border: 1px solid #F0E4D2;
        }

        .faq-item h4 {
            font-size: 1.08rem;
            color: #4A6A3F;
            margin-bottom: 8px;
            font-weight: 650;
        }

        .faq-item p {
            font-size: 0.92rem;
            color: #6F7D6A;
            line-height: 1.6;
        }

        /* CTA 号召区域 */
        .cta-band {
            padding: 64px 0;
            background: linear-gradient(135deg, #FDF9F2 0%, #F8F1E6 100%);
            text-align: center;
            border-top: 1px solid #EDE3D2;
            border-bottom: 1px solid #EDE3D2;
        }

        .cta-band h2 {
            font-size: 2rem;
            font-weight: 750;
            color: #4A6A3F;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }

        .cta-band p {
            font-size: 1.05rem;
            color: #6F7D6A;
            margin-bottom: 28px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-primary {
            background: #8FAA80;
            color: white;
            padding: 15px 42px;
            border-radius: 60px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.25s;
            box-shadow: 0 6px 14px rgba(143, 170, 128, 0.2);
            display: inline-block;
            font-size: 1.1rem;
        }

        .btn-primary:hover {
            background: #7A966A;
            transform: translateY(-2px);
        }

        /* 安卓区域特殊样式 */
        .android-card {
            background: #F9FBF6;
            border: 1px solid #D8E2CF;
        }

        .android-card .btn-download {
            background: #7A966A;
        }

        .footer {
            background: #EDE4D6;
            color: #6A5C4D;
            padding: 56px 0 32px;
            font-size: 0.9rem;
            border-top: 1px solid #E0D2BE;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h4 {
            color: #7B6B56;
            margin-bottom: 18px;
            font-weight: 600;
        }

        .footer-col a {
            display: block;
            color: #896F52;
            text-decoration: none;
            margin-bottom: 10px;
            transition: 0.2s;
        }

        .footer-col a:hover {
            color: #C49A6C;
        }

        .copyright {
            text-align: center;
            padding-top: 28px;
            border-top: 1px solid #D9CAB4;
            color: #A28C70;
        }

        @media (max-width: 768px) {
            .navbar {
                flex-direction: column;
            }
            .nav-links {
                justify-content: center;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .accordion-summary {
                font-size: 1rem;
                padding: 16px 20px;
            }
            .accordion-content {
                padding: 0 20px 20px;
            }
            .cta-band h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 480px) {
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .download-grid {
                grid-template-columns: 1fr;
            }
            .version-tab {
                padding: 10px 18px;
                font-size: 0.9rem;
            }
        }