:root {
    --bg-dark: #07090F; /* 深邃竞速黑 */
    --bg-panel: #111522;
    --neon-cyan: #00F0FF; /* 极速青 */
    --neon-blue: #0044FF; 
    --neon-orange: #FF4D00; /* 性能橙 */
    --text-main: #FFFFFF;
    --text-muted: #8A96AA;
    --border-light: rgba(0, 240, 255, 0.2);
    --glow-cyan: 0 0 15px rgba(0, 240, 255, 0.4);
    --glow-orange: 0 0 15px rgba(255, 77, 0, 0.4);
}

* { 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; }
a { text-decoration: none; color: inherit; transition: 0.3s; }
img { max-width: 100%; display: block; border-radius: 4px; }
ul { list-style: none; }

/* 极速线条背景 */
.speed-lines { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; pointer-events: none; overflow: hidden; }
.speed-line { position: absolute; height: 1px; background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent); width: 200px; animation: speedLine 3s linear infinite; opacity: 0; }
@keyframes speedLine { 0% { transform: translateX(-100%); opacity: 0; } 50% { opacity: 0.5; } 100% { transform: translateX(100vw); opacity: 0; } }

/* 导航 */
.header { background: rgba(7, 9, 15, 0.9); border-bottom: 1px solid var(--border-light); position: sticky; top: 0; z-index: 1000; backdrop-filter: blur(10px); }
.nav-wrap { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; height: 75px; padding: 0 20px; }
.logo { font-size: 24px; font-weight: 900; color: #FFF; display: flex; align-items: center; gap: 10px; font-style: italic; letter-spacing: 1px; }
.logo img { width: 36px; height: 36px; filter: drop-shadow(0 0 8px var(--neon-cyan)); }
.logo span { color: var(--neon-cyan); }
.nav-links { display: flex; gap: 30px; }
.nav-links a { font-size: 15px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; font-style: italic; position: relative; padding: 5px 0; }
.nav-links a:hover, .nav-links a.active { color: var(--neon-cyan); text-shadow: var(--glow-cyan); }
.nav-links a.active::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 100%; height: 2px; background: var(--neon-cyan); box-shadow: var(--glow-cyan); }

.container { max-width: 1200px; margin: 0 auto; padding: 80px 20px; position: relative; z-index: 2; }

/* 倾斜极速按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 40px; font-size: 18px; font-weight: 900; cursor: pointer; transition: 0.3s; text-transform: uppercase; font-style: italic; transform: skewX(-15deg); position: relative; overflow: hidden; }
.btn span { transform: skewX(15deg); display: inline-block; }
.btn-primary { background: linear-gradient(90deg, var(--neon-blue), var(--neon-cyan)); color: #FFF; border: none; box-shadow: var(--glow-cyan); }
.btn-primary:hover { background: linear-gradient(90deg, var(--neon-cyan), var(--neon-blue)); transform: skewX(-15deg) scale(1.05); }
.btn-outline { background: transparent; color: var(--neon-orange); border: 2px solid var(--neon-orange); box-shadow: inset 0 0 10px rgba(255,77,0,0.2); }
.btn-outline:hover { background: var(--neon-orange); color: #000; box-shadow: var(--glow-orange); }

/* 首屏 Hero */
.hero { display: flex; align-items: center; gap: 60px; padding: 100px 20px 120px; max-width: 1200px; margin: 0 auto; position: relative; z-index: 2; }
.hero-content { flex: 1.1; }
.speed-tag { display: inline-block; background: rgba(0, 240, 255, 0.1); border: 1px solid var(--neon-cyan); color: var(--neon-cyan); padding: 5px 15px; font-weight: 800; font-size: 14px; font-style: italic; transform: skewX(-15deg); margin-bottom: 20px; }
.speed-tag span { transform: skewX(15deg); display: block; }
.hero-content h1 { font-size: 64px; font-weight: 900; color: #FFF; margin-bottom: 10px; line-height: 1.1; font-style: italic; text-transform: uppercase; letter-spacing: 2px; }
.hero-content h1 .hl { color: var(--neon-cyan); text-shadow: var(--glow-cyan); }
.hero-content .subtitle { font-size: 24px; color: var(--neon-orange); font-weight: 800; font-style: italic; margin-bottom: 30px; letter-spacing: 4px; text-shadow: var(--glow-orange); }
.hero-content .desc { font-size: 16px; color: var(--text-muted); margin-bottom: 40px; line-height: 1.8; border-left: 3px solid var(--neon-cyan); padding-left: 15px; }
.hero-btns { display: flex; gap: 20px; }
.hero-visual { flex: 1; position: relative; }
.hero-visual img { border: 2px solid var(--neon-cyan); box-shadow: 0 0 40px rgba(0,240,255,0.3); transform: skewY(-3deg); transition: 0.5s; }
.hero-visual:hover img { transform: skewY(0deg) scale(1.02); box-shadow: 0 0 60px rgba(0,240,255,0.5); }

/* 模块标题 */
.sec-title { text-align: center; font-size: 38px; font-weight: 900; color: #FFF; margin-bottom: 60px; font-style: italic; text-transform: uppercase; letter-spacing: 2px; }
.sec-title span { color: var(--neon-cyan); }

/* 核心卖点 - 性能仪表盘风格 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.f-box { background: var(--bg-panel); padding: 35px 20px; text-align: center; border: 1px solid var(--border-light); transform: skewX(-5deg); transition: 0.3s; position: relative; overflow: hidden; }
.f-box > * { transform: skewX(5deg); }
.f-box::before { content: ''; position: absolute; top: 0; left: 0; width: 4px; height: 100%; background: var(--neon-cyan); box-shadow: var(--glow-cyan); opacity: 0; transition: 0.3s; }
.f-box:hover { border-color: var(--neon-cyan); box-shadow: 0 10px 30px rgba(0,0,0,0.5); }
.f-box:hover::before { opacity: 1; }
.f-box img { width: 50px; height: 50px; margin: 0 auto 15px; filter: drop-shadow(0 0 8px var(--neon-cyan)); }
.f-box h3 { font-size: 16px; font-weight: 900; color: #FFF; margin-bottom: 8px; font-style: italic; }
.f-box p { font-size: 13px; color: var(--text-muted); }

/* 功能详情 */
.detail-box { display: flex; align-items: center; gap: 60px; margin-bottom: 80px; background: linear-gradient(90deg, var(--bg-panel), transparent); padding: 40px; border-left: 4px solid var(--neon-cyan); }
.detail-box:nth-child(even) { flex-direction: row-reverse; background: linear-gradient(-90deg, var(--bg-panel), transparent); border-left: none; border-right: 4px solid var(--neon-orange); }
.d-text { flex: 1; }
.d-text h3 { font-size: 32px; font-weight: 900; color: #FFF; margin-bottom: 20px; font-style: italic; text-transform: uppercase; }
.d-text p { font-size: 16px; color: var(--text-muted); margin-bottom: 25px; line-height: 1.8; }
.d-data { display: inline-flex; align-items: baseline; gap: 10px; font-size: 36px; font-weight: 900; color: var(--neon-cyan); font-style: italic; text-shadow: var(--glow-cyan); }
.d-data span { font-size: 16px; color: var(--text-muted); font-weight: normal; font-style: normal; text-shadow: none; }
.d-visual { flex: 1.2; position: relative; }
.d-visual img { border: 1px solid var(--border-light); opacity: 0.9; transition: 0.3s; }
.d-visual:hover img { opacity: 1; border-color: var(--neon-cyan); box-shadow: var(--glow-cyan); }

/* 浏览器对比 - 赛道比拼 */
.compare-box { background: var(--bg-panel); border: 1px solid var(--border-light); padding: 40px; box-shadow: 0 10px 40px rgba(0,0,0,0.5); }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 22px 30px; border-bottom: 1px solid rgba(255,255,255,0.05); }
.compare-table th { color: var(--text-muted); font-size: 14px; font-weight: 800; text-transform: uppercase; font-style: italic; }
.compare-table td { font-size: 15px; color: #FFF; font-weight: 500; }
.compare-table .hl { color: var(--neon-cyan); font-weight: 900; font-size: 16px; background: rgba(0, 240, 255, 0.05); border-left: 2px solid var(--neon-cyan); text-shadow: 0 0 5px rgba(0, 240, 255, 0.3); font-style: italic; }
.compare-table tr:last-child td { border-bottom: none; }

/* 下载版本区 */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.dl-card { background: var(--bg-panel); border: 1px solid var(--border-light); padding: 50px 30px; text-align: center; transition: 0.3s; transform: skewX(-3deg); position: relative; }
.dl-card > * { transform: skewX(3deg); }
.dl-card:hover { border-color: var(--neon-cyan); box-shadow: var(--glow-cyan); transform: skewX(-3deg) translateY(-10px); }
.dl-card.rec { border: 2px solid var(--neon-orange); box-shadow: inset 0 0 20px rgba(255,77,0,0.1); }
.dl-card.rec::before { content: 'SPEED KING'; position: absolute; top: -1px; left: -1px; background: var(--neon-orange); color: #FFF; font-size: 12px; font-weight: 900; padding: 4px 15px; font-style: italic; }
.dl-card h3 { font-size: 24px; font-weight: 900; color: #FFF; margin-bottom: 15px; font-style: italic; }
.dl-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 35px; height: 42px; line-height: 1.6; }
.dl-card .btn { width: 100%; font-size: 16px; }

/* 数据背书 - 仪表盘数字 */
.data-sec { background: rgba(0,0,0,0.6); border-top: 1px solid var(--border-light); border-bottom: 1px solid var(--border-light); padding: 70px 20px; margin: 100px 0; }
.data-inner { max-width: 1000px; margin: 0 auto; display: flex; justify-content: space-around; }
.data-item { text-align: center; }
.data-item h4 { font-size: 56px; font-weight: 900; color: var(--neon-cyan); margin-bottom: 5px; font-style: italic; line-height: 1; text-shadow: var(--glow-cyan); font-family: Impact, sans-serif; }
.data-item p { font-size: 15px; font-weight: 800; color: #FFF; text-transform: uppercase; letter-spacing: 2px; }

/* FAQ */
.faq-grid { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 15px; }
.faq-box { background: var(--bg-panel); border: 1px solid rgba(255,255,255,0.05); padding: 25px 30px; transition: 0.3s; border-left: 3px solid transparent; }
.faq-box:hover { border-left-color: var(--neon-cyan); background: rgba(0, 240, 255, 0.03); }
.faq-box h4 { font-size: 16px; font-weight: 800; color: #FFF; margin-bottom: 12px; font-style: italic; }
.faq-box h4::before { content: '>> '; color: var(--neon-orange); margin-right: 8px; }
.faq-box p { font-size: 14px; color: var(--text-muted); line-height: 1.7; padding-left: 20px; }

/* Footer */
.footer { background: #030408; border-top: 1px solid var(--border-light); text-align: center; padding: 50px; color: var(--text-muted); font-size: 13px; font-weight: bold; letter-spacing: 1px; margin-top: 80px; text-transform: uppercase; }