:root {
    --speed-orange: #FF4D00;
    --speed-yellow: #FFB800;
    --dark-bg: #0A0F16;
    --panel-bg: #121A25;
    --border-neon: rgba(255, 77, 0, 0.3);
    --text-main: #FFFFFF;
    --text-muted: #8E9BAE;
    --grad-orange: linear-gradient(135deg, #FF4D00 0%, #FFB800 100%);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
    font-family: 'Segoe UI', "Microsoft YaHei", sans-serif;
    color: var(--text-main); 
    background-color: var(--dark-bg);
    line-height: 1.6;
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }
img { max-width: 100%; display: block; border-radius: 8px; }

/* 导航 */
.header { background: rgba(10, 15, 22, 0.95); backdrop-filter: blur(10px); border-bottom: 1px solid rgba(255,255,255,0.05); position: sticky; top: 0; z-index: 100; }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; height: 72px; padding: 0 20px; }
.logo { font-size: 24px; font-weight: 800; color: #fff; display: flex; align-items: center; gap: 10px; font-style: italic; letter-spacing: -0.5px; }
.logo span { color: var(--speed-orange); }
.logo img { width: 32px; height: 32px; }
.nav-links { display: flex; gap: 30px; }
.nav-links a { font-size: 15px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.nav-links a:hover, .nav-links a.active { color: var(--speed-orange); text-shadow: 0 0 10px var(--border-neon); }

/* 按钮 */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 12px 32px; border-radius: 4px; font-weight: 700; font-size: 16px;
    cursor: pointer; transition: 0.3s; font-style: italic; letter-spacing: 1px; text-transform: uppercase;
    transform: skewX(-10deg);
}
.btn span { transform: skewX(10deg); } /* 抵消文字倾斜 */
.btn-primary { background: var(--grad-orange); color: #000; box-shadow: 0 4px 15px rgba(255, 77, 0, 0.4); border: none; }
.btn-primary:hover { box-shadow: 0 6px 20px rgba(255, 77, 0, 0.6); background: linear-gradient(135deg, #FF6A00 0%, #FFCC00 100%); }
.btn-outline { background: transparent; color: var(--speed-orange); border: 2px solid var(--speed-orange); }
.btn-outline:hover { background: rgba(255, 77, 0, 0.1); box-shadow: 0 0 15px rgba(255, 77, 0, 0.2); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 90px 0; border-bottom: 1px solid rgba(255,255,255,0.05); }
.sec-title { font-size: 36px; font-weight: 800; margin-bottom: 20px; text-align: center; font-style: italic; text-transform: uppercase; color: #fff; }
.sec-title span { color: var(--speed-orange); }

/* Hero区 (仪表盘背景) */
.hero { 
    padding: 100px 0; 
    background: radial-gradient(circle at 80% 50%, rgba(255, 77, 0, 0.1) 0%, transparent 60%);
    position: relative;
    overflow: hidden;
}
.speed-lines { position: absolute; top: 0; left: 0; width: 100%; height: 100%; opacity: 0.1; background-image: repeating-linear-gradient(90deg, transparent, transparent 100px, #fff 100px, #fff 101px); transform: skewX(-20deg) translateX(-10%); z-index: -1; }
.hero-content { display: flex; align-items: center; gap: 60px; }
.hero-text { flex: 1; }
.badge { display: inline-block; background: rgba(255, 77, 0, 0.15); border: 1px solid var(--speed-orange); color: var(--speed-orange); padding: 4px 12px; border-radius: 20px; font-size: 13px; font-weight: 700; margin-bottom: 20px; font-style: italic; }
.hero-text h1 { font-size: 58px; font-weight: 900; line-height: 1.1; margin-bottom: 16px; font-style: italic; text-transform: uppercase; text-shadow: 0 0 20px rgba(255,77,0,0.3); }
.hero-text .subtitle { font-size: 24px; font-weight: 600; color: var(--text-main); margin-bottom: 24px; }
.hero-text p { font-size: 16px; color: var(--text-muted); margin-bottom: 40px; }
.hero-btns { display: flex; gap: 20px; }
.hero-visual { flex: 1; position: relative; }
/* CSS 模拟仪表盘光环 */
.dashboard-ring { position: absolute; top: -20px; right: -20px; bottom: -20px; left: -20px; border-radius: 50%; border: 2px dashed rgba(255, 77, 0, 0.3); border-top-color: var(--speed-orange); animation: spin 10s linear infinite; z-index: -1; }
@keyframes spin { 100% { transform: rotate(360deg); } }
.hero-visual img { box-shadow: 0 20px 40px rgba(0,0,0,0.5); border: 2px solid var(--panel-bg); }

/* 核心卖点 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.f-card { background: var(--panel-bg); border: 1px solid rgba(255,255,255,0.05); padding: 30px 20px; text-align: center; border-radius: 8px; transition: 0.3s; position: relative; overflow: hidden; }
.f-card::before { content: ''; position: absolute; top: 0; left: 0; width: 3px; height: 100%; background: var(--speed-orange); transform: scaleY(0); transition: 0.3s; transform-origin: bottom; }
.f-card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.4); border-color: rgba(255, 77, 0, 0.3); }
.f-card:hover::before { transform: scaleY(1); }
.f-card img { width: 50px; height: 50px; margin: 0 auto 16px; filter: drop-shadow(0 0 5px rgba(255,77,0,0.5)); }
.f-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; font-style: italic; }
.f-card p { font-size: 13px; color: var(--text-muted); }

/* 功能详情 (带进度条/速度条) */
.detail-modules { display: flex; flex-direction: column; gap: 80px; margin-top: 50px; }
.detail-row { display: flex; align-items: center; gap: 60px; }
.detail-row:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 32px; font-weight: 800; margin-bottom: 20px; font-style: italic; }
.d-text p { font-size: 16px; color: var(--text-muted); margin-bottom: 30px; line-height: 1.8; }
.perf-bar { background: rgba(255,255,255,0.05); border-radius: 20px; height: 8px; width: 100%; position: relative; margin-top: 10px; overflow: hidden; }
.perf-fill { background: var(--grad-orange); height: 100%; border-radius: 20px; position: relative; }
.perf-fill::after { content: ''; position: absolute; top: 0; left: 0; bottom: 0; right: 0; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent); animation: sweep 2s infinite; }
@keyframes sweep { 0% { transform: translateX(-100%); } 100% { transform: translateX(100%); } }
.perf-label { display: flex; justify-content: space-between; font-size: 13px; color: var(--speed-orange); font-weight: 700; margin-top: 5px; font-family: monospace; }
.d-img { flex: 1.2; position: relative; }
.d-img img { box-shadow: 0 10px 30px rgba(0,0,0,0.5); border-radius: 8px; border: 1px solid rgba(255,255,255,0.1); }

/* 对比区 */
.compare-box { background: var(--panel-bg); border: 1px solid rgba(255,255,255,0.05); border-radius: 12px; overflow: hidden; margin-top: 40px; }
.compare-table { width: 100%; border-collapse: collapse; text-align: left; }
.compare-table th, .compare-table td { padding: 20px 25px; border-bottom: 1px solid rgba(255,255,255,0.05); }
.compare-table th { background: rgba(0,0,0,0.3); font-weight: 700; color: var(--text-muted); text-transform: uppercase; font-style: italic; }
.compare-table .hl { background: rgba(255, 77, 0, 0.05); color: var(--speed-orange); font-weight: 800; font-style: italic; border-left: 2px solid var(--speed-orange); }

/* 下载区 */
.download-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-top: 40px; }
.dl-card { background: var(--panel-bg); padding: 40px 30px; border-radius: 12px; text-align: center; border: 1px solid rgba(255,255,255,0.05); transition: 0.3s; display: flex; flex-direction: column; }
.dl-card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.3); }
.dl-card.rec { border-color: var(--speed-orange); position: relative; background: linear-gradient(180deg, rgba(255,77,0,0.05) 0%, var(--panel-bg) 100%); }
.dl-card.rec::after { content: 'MAX SPEED'; position: absolute; top: -14px; left: 50%; transform: translateX(-50%) skewX(-10deg); background: var(--speed-orange); color: #000; font-size: 13px; font-weight: 800; padding: 4px 16px; font-style: italic; }
.dl-card h3 { font-size: 24px; font-weight: 800; margin-bottom: 15px; font-style: italic; }
.dl-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 30px; flex-grow: 1; }
.dl-card .btn { width: 100%; }

/* 数据展示 (数字仪表) */
.data-flex { display: flex; justify-content: space-around; background: var(--panel-bg); border: 1px solid rgba(255,255,255,0.05); border-radius: 12px; padding: 50px 0; margin-top: 40px; }
.data-item { text-align: center; }
.data-item h4 { font-size: 54px; font-weight: 900; color: #fff; text-shadow: 0 0 15px var(--speed-orange); font-family: monospace; line-height: 1; margin-bottom: 10px; font-style: italic; }
.data-item p { font-size: 15px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }

/* FAQ */
.faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 40px; }
.faq-box { background: var(--panel-bg); padding: 25px; border-radius: 8px; border-left: 3px solid rgba(255,255,255,0.1); transition: 0.3s; }
.faq-box:hover { border-left-color: var(--speed-orange); background: rgba(255,255,255,0.02); }
.faq-box h4 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 10px; font-style: italic; }
.faq-box p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

footer { text-align: center; padding: 40px 0; color: var(--text-muted); font-size: 14px; border-top: 1px solid rgba(255,255,255,0.05); font-style: italic; }