:root {
    --bg-dark: #05050C;
    --panel-bg: rgba(15, 15, 30, 0.6);
    --text-main: #E2E8F0;
    --text-muted: #94A3B8;
    --ai-cyan: #00E5FF;
    --ai-cyan-glow: rgba(0, 229, 255, 0.5);
    --ai-purple: #B400FF;
    --ai-purple-glow: rgba(180, 0, 255, 0.5);
    --border-light: rgba(0, 229, 255, 0.2);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    /* 发光网格背景 */
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(0, 229, 255, 0.08), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(180, 0, 255, 0.08), transparent 25%);
    background-attachment: fixed;
}

/* AI 发光核心 */
.ai-core-bg {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; pointer-events: none;
    background: 
        linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    transform: perspective(500px) rotateX(60deg) translateY(-100px) scale(3);
    transform-origin: top center;
    opacity: 0.3;
}

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

/* 玻璃态面板基础类 */
.ai-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5), inset 0 0 20px rgba(0, 229, 255, 0.05);
}

/* 导航 */
.header {
    background: rgba(5, 5, 12, 0.8); backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 229, 255, 0.3);
    box-shadow: 0 0 20px var(--ai-cyan-glow);
    position: sticky; top: 0; z-index: 1000;
}
.nav-wrap { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; }
.logo { font-size: 22px; font-weight: 800; color: #FFF; display: flex; align-items: center; gap: 12px; letter-spacing: 1px; }
.logo-icon { width: 36px; height: 36px; border-radius: 50%; box-shadow: 0 0 15px var(--ai-cyan); border: 2px solid var(--ai-cyan); }
.nav-links { display: flex; gap: 30px; }
.nav-links a { font-size: 15px; font-weight: 600; color: var(--text-muted); transition: 0.3s; letter-spacing: 1px; }
.nav-links a:hover, .nav-links a.active { color: var(--ai-cyan); text-shadow: 0 0 10px var(--ai-cyan-glow); }

/* 按钮 */
.btn {
    display: inline-flex; align-items: center; justify-content: center; padding: 14px 36px;
    border-radius: 30px; font-size: 16px; font-weight: 700; cursor: pointer; transition: 0.3s;
    letter-spacing: 1px; position: relative; overflow: hidden;
}
.btn-primary {
    background: linear-gradient(90deg, var(--ai-cyan), var(--ai-purple));
    color: #FFF; border: none; box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
}
.btn-primary:hover { box-shadow: 0 0 40px rgba(180, 0, 255, 0.6); transform: translateY(-2px); }
.btn-outline {
    background: transparent; color: var(--ai-cyan); border: 1px solid var(--ai-cyan);
    box-shadow: inset 0 0 10px var(--ai-cyan-glow), 0 0 10px var(--ai-cyan-glow);
}
.btn-outline:hover { background: rgba(0, 229, 255, 0.1); box-shadow: inset 0 0 20px var(--ai-cyan-glow), 0 0 20px var(--ai-cyan-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: 40px; font-weight: 800; margin-bottom: 16px; 
    background: linear-gradient(90deg, #FFF, var(--ai-cyan)); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.sec-subtitle { text-align: center; font-size: 16px; color: var(--text-muted); margin-bottom: 60px; letter-spacing: 1px; }

/* Hero区 & AI搜索框 */
.hero { text-align: center; padding: 100px 20px 60px; position: relative; }
.hero h1 { font-size: 64px; font-weight: 900; margin-bottom: 20px; color: #FFF; text-shadow: 0 0 20px var(--ai-cyan-glow); letter-spacing: 2px; }
.hero .subtitle { font-size: 24px; color: var(--ai-cyan); font-weight: 600; margin-bottom: 40px; letter-spacing: 4px; }

.ai-search-box {
    max-width: 700px; margin: 0 auto 50px; display: flex; align-items: center;
    background: rgba(0, 0, 0, 0.5); border: 2px solid var(--ai-purple); border-radius: 40px;
    padding: 10px 10px 10px 30px; box-shadow: 0 0 30px var(--ai-purple-glow);
    backdrop-filter: blur(10px); transition: 0.3s;
}
.ai-search-box:focus-within { box-shadow: 0 0 50px var(--ai-cyan-glow); border-color: var(--ai-cyan); }
.ai-search-box input {
    flex: 1; background: transparent; border: none; outline: none; color: #FFF; font-size: 18px;
}
.ai-search-box input::placeholder { color: rgba(255,255,255,0.4); }
.ai-search-btn {
    background: linear-gradient(45deg, var(--ai-purple), var(--ai-cyan)); color: #FFF;
    border: none; padding: 12px 30px; border-radius: 30px; font-weight: bold; cursor: pointer; font-size: 16px;
}

.hero-btns { display: flex; justify-content: center; gap: 30px; margin-bottom: 60px; }
.hero-visual { max-width: 900px; margin: 0 auto; position: relative; }
.hero-visual img { border: 2px solid var(--border-light); box-shadow: 0 0 40px var(--ai-cyan-glow); }

/* 核心卖点 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.f-box { text-align: center; padding: 30px 15px; transition: 0.4s; position: relative; overflow: hidden; }
.f-box:hover { transform: translateY(-10px); border-color: var(--ai-cyan); box-shadow: 0 10px 30px var(--ai-cyan-glow); }
.f-icon { width: 64px; height: 64px; margin: 0 auto 20px; border-radius: 50%; background: rgba(0, 229, 255, 0.1); display: flex; align-items: center; justify-content: center; border: 1px solid var(--ai-cyan); box-shadow: inset 0 0 15px var(--ai-cyan-glow); }
.f-box img { width: 32px; height: 32px; filter: drop-shadow(0 0 5px var(--ai-cyan)); }
.f-box h3 { font-size: 18px; font-weight: 700; color: #FFF; 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: 60px; margin-bottom: 80px; }
.detail-item:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 32px; font-weight: 800; color: var(--ai-cyan); margin-bottom: 20px; text-shadow: 0 0 10px var(--ai-cyan-glow); }
.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(180, 0, 255, 0.1); color: #FFF; border: 1px solid var(--ai-purple); border-radius: 8px; font-weight: bold; box-shadow: inset 0 0 10px var(--ai-purple-glow); }
.d-visual { flex: 1; position: relative; }
.d-visual img { border-radius: 20px; border: 1px solid var(--border-light); box-shadow: 0 0 30px rgba(180, 0, 255, 0.3); }

/* 浏览器对比 */
.compare-box { padding: 40px; overflow: hidden; }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 20px; border-bottom: 1px solid rgba(255,255,255,0.05); }
.compare-table th { font-weight: 600; color: var(--text-muted); text-transform: uppercase; font-size: 14px; letter-spacing: 1px; }
.compare-table td { font-weight: 500; font-size: 15px; color: #CCC; }
.compare-table .hl { color: #FFF; font-weight: 800; background: rgba(0, 229, 255, 0.1); border-left: 3px solid var(--ai-cyan); text-shadow: 0 0 5px var(--ai-cyan-glow); }
.compare-table tr:hover td { background: rgba(255,255,255,0.02); }
.compare-table tr:last-child td { border-bottom: none; }

/* 数据背书 */
.data-sec { margin: 60px 0; padding: 80px 0; background: linear-gradient(90deg, rgba(0,0,0,0) 0%, rgba(0, 229, 255, 0.05) 50%, rgba(0,0,0,0) 100%); border-top: 1px solid var(--border-light); border-bottom: 1px solid var(--border-light); position: relative; }
.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: 64px; font-weight: 900; color: transparent; -webkit-text-stroke: 1px var(--ai-cyan); text-shadow: 0 0 20px var(--ai-cyan-glow); margin-bottom: 10px; }
.data-item p { font-size: 16px; font-weight: 600; color: var(--text-muted); letter-spacing: 2px; }
.data-icon { width: 90px; height: 90px; filter: drop-shadow(0 0 15px var(--ai-cyan)); }

/* 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; transition: 0.4s; }
.dl-card:hover { transform: translateY(-10px); border-color: var(--ai-purple); box-shadow: 0 15px 40px var(--ai-purple-glow); }
.dl-card h3 { font-size: 24px; font-weight: 800; color: #FFF; margin-bottom: 15px; letter-spacing: 1px; }
.dl-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 30px; height: 42px; }
.dl-card .btn { width: 100%; }
.dl-card.pro { border-color: var(--ai-cyan); box-shadow: 0 0 20px var(--ai-cyan-glow); background: rgba(0, 229, 255, 0.02); }
.dl-card.pro h3 { color: var(--ai-cyan); text-shadow: 0 0 10px var(--ai-cyan-glow); }

/* FAQ */
.faq-wrap { max-width: 900px; margin: 0 auto; }
.faq-item { margin-bottom: 20px; padding: 25px; transition: 0.3s; border-left: 2px solid var(--ai-purple); }
.faq-item:hover { border-left-color: var(--ai-cyan); background: rgba(0, 229, 255, 0.02); }
.faq-item h4 { font-size: 18px; font-weight: 700; color: #FFF; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.faq-item h4::before { content: "AI:"; font-size: 14px; color: var(--ai-cyan); font-weight: 900; background: rgba(0,229,255,0.1); padding: 2px 6px; border-radius: 4px; }
.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-light); color: var(--text-muted); font-size: 14px; margin-top: 80px; background: #020205; }