:root {
    --bg-dark: #070B14;
    --text-main: #F8FAFC;
    --text-muted: #94A3B8;
    --primary: #00F0FF;
    --primary-glow: rgba(0, 240, 255, 0.4);
    --secondary: #7000FF;
    --panel-bg: rgba(15, 23, 42, 0.7);
    --border: rgba(0, 240, 255, 0.2);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* 科技光圈背景 */
body::before, body::after {
    content: ""; position: absolute; border-radius: 50%; filter: blur(120px); z-index: -1; opacity: 0.5;
}
body::before {
    width: 600px; height: 600px; background: var(--secondary); top: -200px; left: -100px; animation: float 10s infinite alternate;
}
body::after {
    width: 500px; height: 500px; background: var(--primary); top: 300px; right: -150px; animation: float 12s infinite alternate-reverse;
}
@keyframes float {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

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

/* 导航 */
.header {
    background: rgba(7, 11, 20, 0.8); backdrop-filter: blur(15px); border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 1000; padding: 15px 0;
}
.nav-wrap { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 0 20px; }
.logo { font-size: 24px; font-weight: bold; color: #FFF; display: flex; align-items: center; gap: 12px; }
.logo-icon { width: 36px; height: 36px; }
.nav-links { display: flex; gap: 25px; }
.nav-links a { font-size: 15px; color: var(--text-muted); position: relative; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); text-shadow: 0 0 10px var(--primary-glow); }
.nav-links a.active::after {
    content: ''; position: absolute; bottom: -20px; left: 0; width: 100%; height: 2px; background: var(--primary); box-shadow: 0 0 10px var(--primary);
}

/* 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; border: 1px solid var(--primary);
}
.btn-primary {
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    color: #fff; border: none; box-shadow: 0 0 20px var(--primary-glow);
}
.btn-primary:hover { box-shadow: 0 0 40px var(--primary-glow); transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--primary); }
.btn-outline:hover { background: var(--primary-glow); }

/* 通用容器 */
.container { max-width: 1200px; margin: 0 auto; padding: 80px 20px; position: relative; z-index: 1; }
.sec-title { text-align: center; font-size: 36px; font-weight: bold; margin-bottom: 15px; text-shadow: 0 0 15px var(--primary-glow); }
.sec-subtitle { text-align: center; font-size: 16px; color: var(--text-muted); margin-bottom: 60px; }

/* 玻璃态面板 */
.glass-panel {
    background: var(--panel-bg); backdrop-filter: blur(20px); border: 1px solid var(--border);
    border-radius: 20px; padding: 40px; box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

/* AI 搜索框 (Hero 区专属) */
.hero { text-align: center; padding: 80px 20px 60px; position: relative; z-index: 1; }
.hero h1 { font-size: 60px; font-weight: 900; background: linear-gradient(90deg, #fff, var(--primary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 20px; }
.hero .subtitle { font-size: 22px; color: var(--text-muted); margin-bottom: 50px; letter-spacing: 2px; }

.search-box-wrap { max-width: 700px; margin: 0 auto 40px; }
.search-bar {
    display: flex; align-items: center; background: rgba(0, 0, 0, 0.6); border: 2px solid var(--primary);
    border-radius: 50px; padding: 10px 10px 10px 30px; box-shadow: 0 0 30px var(--primary-glow); transition: 0.3s;
}
.search-bar:focus-within { box-shadow: 0 0 50px var(--primary-glow); background: rgba(15, 23, 42, 0.8); }
.search-bar input {
    flex: 1; background: transparent; border: none; outline: none; color: #FFF; font-size: 18px; padding-right: 20px;
}
.search-bar input::placeholder { color: var(--text-muted); }
.search-btn {
    background: var(--primary); color: #000; border: none; padding: 12px 30px; border-radius: 40px; font-size: 16px; font-weight: bold; cursor: pointer;
}
.smart-tags { margin-top: 15px; font-size: 14px; color: var(--text-muted); display: flex; justify-content: center; gap: 15px; align-items: center; }
.smart-tags a { color: var(--primary); background: rgba(0,240,255,0.1); padding: 4px 12px; border-radius: 20px; border: 1px solid var(--border); }
.smart-tags a:hover { background: var(--primary); color: #000; }

.hero-btns { display: flex; justify-content: center; gap: 30px; margin-bottom: 60px; }
.hero-visual img { border: 1px solid var(--border); box-shadow: 0 0 40px var(--primary-glow); margin: 0 auto; }

/* 核心卖点 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.f-box { text-align: center; padding: 30px 15px; border-radius: 16px; background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.05); transition: 0.3s; }
.f-box:hover { background: var(--panel-bg); border-color: var(--primary); box-shadow: 0 0 20px var(--primary-glow); transform: translateY(-5px); }
.f-box img { width: 60px; height: 60px; margin: 0 auto 20px; filter: drop-shadow(0 0 10px var(--primary)); }
.f-box h3 { font-size: 16px; font-weight: bold; margin-bottom: 10px; }
.f-box p { font-size: 13px; color: var(--text-muted); }

/* 功能详情 */
.detail-item { display: flex; align-items: center; gap: 50px; margin-bottom: 60px; }
.detail-item:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 30px; font-weight: bold; margin-bottom: 20px; color: var(--primary); }
.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(0,240,255,0.1); border: 1px solid var(--primary); border-radius: 8px; color: var(--primary); font-weight: bold; }
.d-visual { flex: 1; position: relative; }
.d-visual::after { content: ''; position: absolute; top: -10px; left: -10px; right: -10px; bottom: -10px; background: var(--primary-glow); filter: blur(30px); z-index: -1; }

/* 浏览器对比 */
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 20px; border-bottom: 1px solid var(--border); }
.compare-table th { color: var(--text-muted); font-weight: normal; }
.compare-table .hl { color: var(--primary); font-weight: bold; text-shadow: 0 0 10px var(--primary-glow); }
.compare-table tbody tr:hover { background: rgba(0, 240, 255, 0.05); }

/* 数据背书 */
.data-sec { background: rgba(0,0,0,0.5); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 60px 0; margin: 40px 0; }
.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; background: linear-gradient(90deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.data-item p { font-size: 16px; color: var(--text-muted); margin-top: 10px; }
.data-icon { width: 80px; height: 80px; filter: drop-shadow(0 0 20px var(--primary)); }

/* 下载版本区 */
.dl-wrap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.dl-card { padding: 40px 30px; text-align: center; border-radius: 20px; background: rgba(255,255,255,0.02); border: 1px solid var(--border); transition: 0.3s; position: relative; overflow: hidden; }
.dl-card:hover { border-color: var(--primary); box-shadow: 0 0 30px var(--primary-glow); transform: translateY(-10px); }
.dl-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: linear-gradient(90deg, var(--primary), var(--secondary)); opacity: 0; transition: 0.3s; }
.dl-card:hover::before { opacity: 1; }
.dl-card h3 { font-size: 24px; font-weight: bold; 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: 12px; background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.05); }
.faq-item h4 { font-size: 18px; color: var(--primary); margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.faq-item h4::before { content: "Q:"; font-weight: 900; color: #FFF; background: var(--secondary); padding: 2px 8px; border-radius: 6px; font-size: 14px; }
.faq-item p { font-size: 15px; color: var(--text-muted); line-height: 1.7; padding-left: 36px; }

/* Footer */
.footer { padding: 40px 20px; text-align: center; border-top: 1px solid var(--border); color: var(--text-muted); font-size: 14px; background: #000; margin-top: 50px; }