:root {
    --cyber-bg: #030712;
    --cyber-grid: rgba(0, 240, 255, 0.08);
    --neon-cyan: #00f0ff;
    --neon-cyan-glow: rgba(0, 240, 255, 0.4);
    --neon-purple: #8a2be2;
    --neon-purple-glow: rgba(138, 43, 226, 0.4);
    --glass-bg: rgba(10, 15, 30, 0.65);
    --text-main: #f8fafc;
    --text-dark: #94a3b8;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    color: var(--text-main); 
    background-color: var(--cyber-bg);
    /* 速度光流与数字网格背景 */
    background-image: 
        linear-gradient(0deg, transparent 24%, var(--cyber-grid) 25%, var(--cyber-grid) 26%, transparent 27%, transparent 74%, var(--cyber-grid) 75%, var(--cyber-grid) 76%, transparent 77%, transparent),
        linear-gradient(90deg, transparent 24%, var(--cyber-grid) 25%, var(--cyber-grid) 26%, transparent 27%, transparent 74%, var(--cyber-grid) 75%, var(--cyber-grid) 76%, transparent 77%, transparent);
    background-size: 50px 50px;
    background-attachment: fixed;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}
/* 速度光流动画 */
body::before {
    content: '';
    position: fixed; top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle, var(--neon-cyan-glow) 0%, transparent 60%);
    opacity: 0.15; z-index: -1; animation: rotateGlow 20s linear infinite;
}
@keyframes rotateGlow { 100% { transform: rotate(360deg); } }
@keyframes float {
    0% { transform: translateY(0px) rotateX(0deg); box-shadow: 0 10px 30px var(--neon-cyan-glow); }
    50% { transform: translateY(-15px) rotateX(2deg); box-shadow: 0 25px 50px var(--neon-purple-glow); }
    100% { transform: translateY(0px) rotateX(0deg); box-shadow: 0 10px 30px var(--neon-cyan-glow); }
}
@keyframes stream {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }
img { max-width: 100%; display: block; border-radius: 8px; }

header {
    background: rgba(3, 7, 18, 0.8);
    backdrop-filter: blur(12px); border-bottom: 1px solid rgba(0, 240, 255, 0.2);
    position: sticky; top: 0; z-index: 1000;
}
.nav-inner { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; height: 70px; padding: 0 20px; }
.logo { font-size: 24px; font-weight: 800; color: #fff; text-shadow: 0 0 10px var(--neon-cyan); display: flex; align-items: center; gap: 10px; }
.logo img { width: 30px; height: 30px; }
.logo span { color: var(--neon-cyan); }
.nav-links { display: flex; gap: 30px; }
.nav-links a { font-size: 15px; font-weight: 500; letter-spacing: 1px; color: var(--text-dark); text-transform: uppercase; }
.nav-links a:hover, .nav-links a.active { color: var(--neon-cyan); text-shadow: 0 0 8px var(--neon-cyan); }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 12px 30px; border-radius: 4px; font-weight: 700; font-size: 16px;
    cursor: pointer; transition: 0.3s; text-transform: uppercase; letter-spacing: 1px;
    position: relative; overflow: hidden;
}
.btn-primary { 
    background: transparent; color: var(--neon-cyan); border: 1px solid var(--neon-cyan);
    box-shadow: 0 0 15px rgba(0,240,255,0.2), inset 0 0 10px rgba(0,240,255,0.1);
}
.btn-primary:hover {
    background: var(--neon-cyan); color: #000; box-shadow: 0 0 25px var(--neon-cyan);
}
.btn-outline { 
    background: transparent; color: var(--neon-purple); border: 1px solid var(--neon-purple);
    box-shadow: 0 0 15px rgba(138,43,226,0.2), inset 0 0 10px rgba(138,43,226,0.1);
}
.btn-outline:hover {
    background: var(--neon-purple); color: #fff; box-shadow: 0 0 25px var(--neon-purple);
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; position: relative; z-index: 10; }

section { padding: 90px 0; border-bottom: 1px solid rgba(255,255,255,0.05); }
.sec-title { 
    font-size: 36px; font-weight: 800; margin-bottom: 50px; text-align: center; 
    color: #fff; text-shadow: 0 0 15px var(--neon-cyan); 
    text-transform: uppercase; letter-spacing: 2px;
}

/* Hero区 */
.hero { padding: 120px 0; display: flex; align-items: center; gap: 50px; perspective: 1000px; }
.hero-text { flex: 1; }
.hero-title { font-size: 60px; font-weight: 900; line-height: 1.1; margin-bottom: 20px; 
    background: linear-gradient(to right, var(--neon-cyan), var(--neon-purple));
    -webkit-background-clip: text; color: transparent; text-shadow: 0 0 30px rgba(0,240,255,0.3); }
.hero-subtitle { font-size: 24px; font-weight: 600; color: #fff; margin-bottom: 15px; letter-spacing: 3px; }
.hero-desc { font-size: 16px; color: var(--text-dark); margin-bottom: 40px; }
.hero-btns { display: flex; gap: 20px; }
.hero-img { flex: 1; border-radius: 12px; }
.floating-screen { 
    background: var(--glass-bg); padding: 15px; border-radius: 12px;
    border: 1px solid rgba(0,240,255,0.3);
    animation: float 6s ease-in-out infinite; 
}

/* 核心卖点 */
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.f-card { 
    background: var(--glass-bg); border: 1px solid rgba(255,255,255,0.1); 
    padding: 30px 20px; text-align: center; border-radius: 8px; backdrop-filter: blur(10px);
    transition: 0.4s; position: relative; overflow: hidden;
}
.f-card::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 2px;
    background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
    background-size: 200% 100%; animation: stream 3s linear infinite; opacity: 0; transition: 0.4s;
}
.f-card:hover { border-color: rgba(0,240,255,0.5); transform: translateY(-5px); box-shadow: 0 10px 25px rgba(0,240,255,0.1); }
.f-card:hover::before { opacity: 1; }
.f-card img { width: 50px; height: 50px; margin: 0 auto 20px; filter: drop-shadow(0 0 8px var(--neon-cyan)); }
.f-card h3 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 10px; }
.f-card p { font-size: 13px; color: var(--text-dark); }

/* 功能详情 */
.detail-list { display: flex; flex-direction: column; gap: 80px; }
.detail-item { display: flex; gap: 50px; align-items: center; }
.detail-item:nth-child(even) { flex-direction: row-reverse; }
.d-text { flex: 1; }
.d-text h3 { font-size: 28px; font-weight: 700; margin-bottom: 20px; color: var(--neon-cyan); text-shadow: 0 0 10px rgba(0,240,255,0.3); }
.d-text p { font-size: 16px; color: var(--text-dark); margin-bottom: 20px; line-height: 1.8; }
.d-data { display: inline-block; background: rgba(0,240,255,0.1); border: 1px solid var(--neon-cyan); color: #fff; padding: 6px 15px; border-radius: 4px; font-size: 14px; font-weight: 600; box-shadow: 0 0 10px rgba(0,240,255,0.2); }
.d-img { flex: 1; }
.d-img img { border: 1px solid rgba(255,255,255,0.1); box-shadow: 0 15px 35px rgba(0,0,0,0.5); transition: 0.5s; }
.d-img:hover img { border-color: var(--neon-purple); box-shadow: 0 15px 35px rgba(138,43,226,0.3); }

/* 浏览器对比 */
.compare-wrapper { background: var(--glass-bg); backdrop-filter: blur(10px); border: 1px solid rgba(0,240,255,0.2); border-radius: 12px; padding: 2px; box-shadow: 0 0 30px rgba(0,0,0,0.5); }
.compare-table { width: 100%; border-collapse: collapse; text-align: center; }
.compare-table th, .compare-table td { padding: 20px; border-bottom: 1px solid rgba(255,255,255,0.05); }
.compare-table th { font-weight: 700; color: var(--text-dark); text-transform: uppercase; font-size: 14px; letter-spacing: 1px; }
.compare-table td { font-size: 15px; color: #fff; }
.compare-table .hl { background: rgba(0,240,255,0.05); color: var(--neon-cyan); font-weight: 700; border-left: 1px solid rgba(0,240,255,0.2); border-right: 1px solid rgba(0,240,255,0.2); text-shadow: 0 0 5px rgba(0,240,255,0.5); }
.compare-table th.hl { border-top: 1px solid rgba(0,240,255,0.2); border-radius: 8px 8px 0 0; }
.compare-table tr:last-child .hl { border-bottom: 1px solid rgba(0,240,255,0.2); border-radius: 0 0 8px 8px; }

/* 下载版本 */
.v-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.v-card { 
    background: linear-gradient(180deg, rgba(15,23,42,0.8), rgba(3,7,18,0.9)); 
    border: 1px solid rgba(255,255,255,0.1); padding: 40px 30px; text-align: center; border-radius: 12px;
    transition: 0.4s; backdrop-filter: blur(10px);
}
.v-card:hover { transform: translateY(-10px); box-shadow: 0 15px 30px rgba(0,0,0,0.5); }
.v-card.rec { border-color: var(--neon-cyan); box-shadow: 0 0 20px rgba(0,240,255,0.15); }
.v-card.rec::before { content: 'RECOMMENDED'; display: block; color: #000; background: var(--neon-cyan); font-size: 12px; font-weight: 800; padding: 4px 0; border-radius: 4px; margin-bottom: 20px; letter-spacing: 2px; }
.v-card h3 { font-size: 24px; font-weight: 800; color: #fff; margin-bottom: 15px; }
.v-card p { font-size: 14px; color: var(--text-dark); margin-bottom: 30px; height: 60px; }

/* 数据背书 */
.data-sec { display: flex; justify-content: space-around; padding: 60px; background: rgba(0,240,255,0.03); border: 1px solid rgba(0,240,255,0.1); border-radius: 12px; backdrop-filter: blur(5px); }
.data-item { text-align: center; }
.data-item h4 { font-size: 48px; font-weight: 900; color: var(--neon-cyan); text-shadow: 0 0 20px rgba(0,240,255,0.5); margin-bottom: 10px; font-family: monospace; }
.data-item p { font-size: 16px; color: var(--text-main); font-weight: 500; letter-spacing: 1px; }

/* FAQ */
.faq-grid { display: grid; grid-template-columns: 1fr; gap: 20px; max-width: 800px; margin: 0 auto; }
.faq-box { background: rgba(255,255,255,0.02); border-left: 3px solid var(--neon-purple); padding: 25px; border-radius: 0 8px 8px 0; transition: 0.3s; }
.faq-box:hover { background: rgba(138,43,226,0.05); box-shadow: 0 0 15px rgba(138,43,226,0.1); }
.faq-box h4 { font-size: 18px; font-weight: 600; color: #fff; margin-bottom: 10px; }
.faq-box p { font-size: 14px; color: var(--text-dark); line-height: 1.7; }

footer { text-align: center; padding: 40px 0; color: var(--text-dark); font-size: 13px; border-top: 1px solid rgba(255,255,255,0.05); }