:root {
        --bg-main: #0f1115;
        --bg-card: #1a1d24;
        --text-main: #f0f2f5;
        --text-muted: #9aa2b1;
        --accent-1: #ff7e5f;
        --accent-2: #feb47b;
        --accent-3: #6a11cb;
        --accent-4: #2575fc;
        --accent-5: #11998e;
        --accent-6: #38ef7d;
        --accent-7: #cb2d3e;
        --accent-8: #ef473a;
        --accent-9: #8e2de2;
        --accent-10: #4a00e0;
        --border-radius: 12px;
        --nav-height: 60px;
    }

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

    body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        background-color: var(--bg-main);
        color: var(--text-main);
        line-height: 1.6;
        overflow-x: hidden;
    }

    a {
        text-decoration: none;
        color: inherit;
    }

    /* 顶部导航 */
    .top-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: var(--nav-height);
        background: rgba(15, 17, 21, 0.9);
        backdrop-filter: blur(10px);
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 20px;
        z-index: 1000;
        border-bottom: 1px solid rgba(255,255,255,0.05);
    }

    .brand {
        display: flex;
        align-items: center;
        gap: 10px;
        font-weight: 600;
        font-size: 18px;
    }

    .brand img {
        height: 32px;
        width: auto;
        border-radius: 6px;
    }

    .nav-links {
        display: flex;
        gap: 15px;
        overflow-x: auto;
        scrollbar-width: none;
        padding-left: 20px;
    }
    
    .nav-links::-webkit-scrollbar {
        display: none;
    }

    .nav-links a {
        font-size: 14px;
        color: var(--text-muted);
        white-space: nowrap;
        transition: color 0.3s;
    }

    .nav-links a:hover {
        color: var(--text-main);
    }

    /* 通用区块样式 */
    section {
        padding: 80px 20px 40px;
        max-width: 1200px;
        margin: 0 auto;
    }

    h1 {
        font-size: 32px;
        margin-bottom: 16px;
        line-height: 1.3;
        background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    h2 {
        font-size: 24px;
        margin-bottom: 24px;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    h2::before {
        content: '';
        display: block;
        width: 4px;
        height: 24px;
        border-radius: 2px;
        background: var(--accent-1);
    }

    h3 {
        font-size: 18px;
        margin-bottom: 12px;
    }

    p {
        color: var(--text-muted);
        margin-bottom: 16px;
        font-size: 15px;
    }

    /* 按钮 */
    .btn-download {
        display: inline-block;
        background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
        color: #fff;
        padding: 14px 32px;
        border-radius: 30px;
        font-size: 16px;
        font-weight: 600;
        text-align: center;
        transition: transform 0.2s, box-shadow 0.2s;
        box-shadow: 0 4px 15px rgba(255, 126, 95, 0.3);
        margin-top: 20px;
    }

    .btn-download:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(255, 126, 95, 0.4);
    }

    /* 首屏 */
    .hero {
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding-top: 120px;
        padding-bottom: 60px;
    }

    .hero p {
        font-size: 18px;
        max-width: 600px;
    }

    /* 截图墙 */
    .screenshot-wall {
        display: flex;
        overflow-x: auto;
        gap: 16px;
        padding-bottom: 20px;
        scroll-snap-type: x mandatory;
        scrollbar-width: none;
    }
    .screenshot-wall::-webkit-scrollbar {
        display: none;
    }

    .screenshot-wall img {
        height: 320px;
        width: auto;
        border-radius: var(--border-radius);
        object-fit: cover;
        scroll-snap-align: start;
        box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    }

    /* 特色功能网格 */
    .features-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .feature-card {
        background: var(--bg-card);
        padding: 24px;
        border-radius: var(--border-radius);
        border: 1px solid rgba(255,255,255,0.05);
    }

    /* TOP榜单 */
    .top-list {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .top-item {
        display: flex;
        align-items: center;
        background: var(--bg-card);
        padding: 16px;
        border-radius: var(--border-radius);
        gap: 16px;
    }

    .top-item img {
        width: 60px;
        height: 80px;
        object-fit: cover;
        border-radius: 8px;
    }

    .top-info h3 {
        margin-bottom: 4px;
        font-size: 16px;
    }

    .top-info p {
        margin-bottom: 0;
        font-size: 13px;
    }

    .rank {
        font-size: 20px;
        font-weight: 800;
        color: var(--accent-1);
        width: 30px;
        text-align: center;
    }

    /* 题材导览 */
    .genres {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
    }

    .genre-tag {
        background: rgba(255,255,255,0.1);
        padding: 8px 16px;
        border-radius: 20px;
        font-size: 14px;
        color: var(--text-main);
    }

    /* 问答 */
    .faq-item {
        background: var(--bg-card);
        padding: 20px;
        border-radius: var(--border-radius);
        margin-bottom: 16px;
    }
    .faq-item h3 {
        color: var(--accent-2);
        font-size: 16px;
    }

    /* 权威认证 */
    .cert-banner {
        background: linear-gradient(135deg, rgba(37, 117, 252, 0.1), rgba(106, 17, 203, 0.1));
        border: 1px solid rgba(37, 117, 252, 0.2);
        padding: 30px;
        border-radius: var(--border-radius);
        text-align: center;
    }

    /* 页脚 */
    footer {
        text-align: center;
        padding: 40px 20px;
        border-top: 1px solid rgba(255,255,255,0.05);
        font-size: 12px;
        color: var(--text-muted);
        margin-top: 40px;
    }

    footer p {
        margin-bottom: 8px;
        color: var(--text-muted);
    }

    footer a {
        color: var(--text-muted);
        text-decoration: underline;
    }

    /* 响应式 */
    @media (min-width: 768px) {
        section {
            padding: 100px 40px 60px;
        }
        .hero {
            padding-top: 160px;
        }
        h1 {
            font-size: 48px;
        }
        .screenshot-wall img {
            height: 420px;
        }
        .features-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .top-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
        }
    }

    @media (min-width: 1024px) {
        .features-grid {
            grid-template-columns: repeat(3, 1fr);
        }
        .hero {
            flex-direction: row;
            text-align: left;
            justify-content: space-between;
            max-width: 1000px;
        }
        .hero-text {
            max-width: 500px;
        }
        .hero-img {
            width: 300px;
            border-radius: var(--border-radius);
            box-shadow: 0 10px 30px rgba(0,0,0,0.5);
        }
        .top-list {
            grid-template-columns: repeat(3, 1fr);
        }
    }