:root {
    --glass-bg: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    --glass-hover: rgba(255, 255, 255, 0.35);
    --text-main: #1E293B;
    --text-muted: #475569;
    --primary: #3B82F6;
    --primary-hover: #2563EB;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Microsoft YaHei", sans-serif;
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    background-color: #f1f5f9;
    /* 模糊背景 - 几何图形 */
    background-image: 
        radial-gradient(at 0% 0%, hsla(253,16%,7%,1) 0, transparent 50%), 
        radial-gradient(at 50% 0%, hsla(225,39%,30%,1) 0, transparent 50%), 
        radial-gradient(at 100% 0%, hsla(339,49%,30%,1) 0, transparent 50%);
    background-attachment: fixed;
    background-size: cover;
    position: relative;
}

/* 覆盖一层浅色遮罩让文字更易读 */
body::after {
    content: '';
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(248, 250, 252, 0.85);
    z-index: -1;
}

/* 动态悬浮球 */
.blob {
    position: fixed; filter: blur(80px); z-index: -1; opacity: 0.6; border-radius: 50%;
    animation: move 15s infinite alternate;
}
.blob-1 { top: -10%; left: -10%; width: 500px; height: 500px; background: #93C5FD; }
.blob-2 { bottom: -10%; right: -10%; width: 600px; height: 600px; background: #A78BFA; animation-delay: -5s; }
.blob-3 { top: 40%; left: 40%; width: 400px; height: 400px; background: #6EE7B7; animation-delay: -10s; }

@keyframes move {
    from { transform: translate(0, 0) scale(1); }
    to { transform: translate(100px, 50px) scale(1.2); }
}

a { text-decoration: none; color: inherit; transition: 0.3s; }
img { max-width: 100%; display: block; border-radius: 12px; }

/* 核心毛玻璃类 */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

/* 导航 */
.header {
    position: sticky; top: 0; z-index: 1000;
    margin: 15px 20px; border-radius: 20px;
}
.nav-wrap { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 15px 24px; }
.logo { font-size: 22px; font-weight: 800; display: flex; align-items: center; gap: 12px; }
.logo-icon { width: 36px; height: 36px; border-radius: 10px; background: rgba(255,255,255,0.5); padding: 4px; }
.nav-links { display: flex; gap: 24px; }
.nav-links a { font-size: 15px; font-weight: 600; padding: 8px 16px; border-radius: 12px; }
.nav-links a:hover, .nav-links a.active { background: rgba(255,255,255,0.4); box-shadow: inset 0 0 10px rgba(255,255,255,0.2); }

/* 按钮 */
.btn {
    display: inline-flex; align-items: center; justify-content: center; padding: 14px 32px;
    border-radius: 30px; font-size: 16px; font-weight: bold; cursor: pointer; transition: 0.3s;
}
.btn-primary {
    background: var(--primary); color: #fff; box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4); border: none;
}
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6); }
.btn-glass {
    background: rgba(255,255,255,0.2); color: var(--text-main); border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.btn-glass:hover { background: rgba(255,255,255,0.4); transform: translateY(-2px); }

/* 通用容器 */
.container { max-width: 1200px; margin: 0 auto; padding: 60px 20px; position: relative; z-index: 1; }
.sec-title { text-align: center; font-size: 36px; font-weight: 800; margin-bottom: 16px; letter-spacing: -0.5px; }
.sec-subtitle { text-align: center; font-size: 16px; color: var(--text-muted); margin-bottom: 50px; font-weight: 500; }

/* Hero区 */
.hero { text-align: center; padding: 80px 20px 60px; }
.hero h1 { font-size: 56px; font-weight: 900; margin-bottom: 20px; letter-spacing: -1px; }
.hero .subtitle { font-size: 22px; color: var(--primary); font-weight: bold; margin-bottom: 40px; }
.hero-btns { display: flex; justify-content: center; gap: 24px; margin-bottom: 60px; }
.hero-visual { max-width: 900px; margin: 0 auto; padding: 15px; border-radius: 24px; }
.hero-visual img { border-radius: 16px; box-shadow: 0 20px 40px rgba(0,0,0,0.1); }

/* 核心卖点 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; }
.f-box { text-align: center; padding: 30px 15px; border-radius: 20px; transition: 0.3s; }
.f-box:hover { background: var(--glass-hover); transform: translateY(-5px); border-color: rgba(255,255,255,0.6); }
.f-icon { width: 64px; height: 64px; margin: 0 auto 20px; border-radius: 50%; background: rgba(255,255,255,0.5); display: flex; align-items: center; justify-content: center; border: 1px solid var(--glass-border); box-shadow: inset 0 2px 4px rgba(255,255,255,0.5); }
.f-box img { width: 36px; height: 36px; }
.f-box h3 { font-size: 16px; font-weight: bold; margin-bottom: 8px; }
.f-box p { font-size: 13px; color: var(--text-muted); }

/* 功能详情 */
.detail-item { display: flex; align-items: center; gap: 60px; margin-bottom: 60px; padding: 40px; border-radius: 30px; }
.detail-item:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 30px; font-weight: 800; margin-bottom: 20px; }
.d-text p { font-size: 16px; color: var(--text-muted); margin-bottom: 30px; line-height: 1.8; }
.d-data { display: inline-block; padding: 10px 20px; background: rgba(59, 130, 246, 0.1); color: var(--primary); border: 1px solid rgba(59, 130, 246, 0.2); border-radius: 12px; font-weight: bold; }
.d-visual { flex: 1; padding: 10px; border-radius: 20px; background: rgba(255,255,255,0.3); }

/* 浏览器对比 */
.compare-box { border-radius: 24px; overflow: hidden; padding: 30px; }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 20px; border-bottom: 1px solid var(--glass-border); }
.compare-table th { font-weight: 600; color: var(--text-muted); text-transform: uppercase; font-size: 13px; letter-spacing: 1px; }
.compare-table td { font-weight: 600; }
.compare-table .hl { color: var(--primary); font-weight: 800; font-size: 16px; background: rgba(255,255,255,0.2); border-radius: 8px; }
.compare-table tr:last-child td { border-bottom: none; }

/* 数据背书 */
.data-sec { margin: 60px 20px; padding: 60px 0; border-radius: 30px; }
.data-inner { max-width: 1000px; margin: 0 auto; display: flex; justify-content: space-around; align-items: center; text-align: center; }
.data-item h4 { font-size: 48px; font-weight: 900; color: var(--primary); margin-bottom: 10px; text-shadow: 0 2px 10px rgba(255,255,255,0.5); }
.data-item p { font-size: 16px; font-weight: 600; color: var(--text-main); }
.data-icon { width: 80px; height: 80px; background: rgba(255,255,255,0.4); border-radius: 24px; padding: 15px; border: 1px solid var(--glass-border); }

/* 下载版本区 */
.dl-wrap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.dl-card { padding: 40px 30px; border-radius: 24px; text-align: center; transition: 0.3s; }
.dl-card:hover { transform: translateY(-8px); background: var(--glass-hover); border-color: #fff; }
.dl-card.pro { background: rgba(255,255,255,0.4); border: 2px solid rgba(255,255,255,0.8); }
.dl-card h3 { font-size: 24px; font-weight: 800; margin-bottom: 15px; }
.dl-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 30px; height: 42px; }
.dl-card .btn { width: 100%; }

/* FAQ */
.faq-wrap { max-width: 900px; margin: 0 auto; }
.faq-item { margin-bottom: 20px; padding: 25px; border-radius: 16px; transition: 0.2s; }
.faq-item:hover { background: var(--glass-hover); }
.faq-item h4 { font-size: 18px; font-weight: bold; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.faq-item h4::before { content: ""; display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 10px var(--primary); }
.faq-item p { font-size: 15px; color: var(--text-muted); padding-left: 18px; }

/* Footer */
.footer { margin: 60px 20px 20px; padding: 30px 20px; text-align: center; border-radius: 20px; font-size: 14px; font-weight: 600; color: var(--text-muted); }