/* 颜色变量 */
:root{
    --primary:#165DFF;
    --gray-bg:#f2f3f5;
    --gray-text:#666;
    --gray-light:#eee;
    --shadow:0 4px 12px rgba(22,93,255,0.15);
}

/* 容器 */
.container{max-width:1200px;margin:0 auto;padding:0 16px}

/* 导航 */
.header{position:fixed;top:0;left:0;width:100%;background:rgba(255,255,255,.95);backdrop-filter:blur(4px);z-index:99;border-bottom:1px solid #eee}
.nav-wrap{display:flex;justify-content:space-between;align-items:center;height:64px}
.logo{font-size:20px;font-weight:bold;color:var(--primary)}
.pc-nav{display:flex;gap:28px;font-size:14px}
.pc-nav a:hover{color:var(--primary)}
.menu-btn{display:none;font-size:20px;border:none;background:transparent;cursor:pointer}
.mobile-nav{max-height:0;overflow:hidden;transition:max-height .3s;border-top:1px solid #eee}
.mobile-nav.open{max-height:240px}
.mobile-nav a{display:block;padding:10px 0;font-size:14px}
.mobile-nav a:hover{color:var(--primary)}

/* 首屏hero */
.hero{padding:120px 0 80px;background:linear-gradient(to bottom,#eef5ff,#fff)}
.hero-row{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.hero h1{font-size:clamp(2rem,5vw,3rem);line-height:1.2;margin-bottom:16px}
.hero-desc{font-size:18px;color:var(--gray-text);margin-bottom:20px}
.hero-tags{display:flex;flex-wrap:wrap;gap:16px;color:#555;font-size:14px;margin-bottom:28px}
.hero-btns{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.btn-main{background:var(--primary);color:#fff;padding:12px 24px;border-radius:8px;font-weight:500;box-shadow:var(--shadow)}
.btn-main:hover{opacity:.92}
.btn-outline{border:1px solid #ccc;color:#333;padding:12px 20px;border-radius:8px}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.hero-tip{margin-top:12px;font-size:13px;color:#888}
.hero-img{border-radius:12px;box-shadow:0 8px 24px rgba(0,0,0,0.08);border:1px solid #eee;width:100%}

/* 滚动logo区 */
.logo-sec{padding:60px 0;background:var(--gray-bg)}
.sec-title{text-align:center;margin-bottom:40px}
.sec-title h2{font-size:20px;margin-bottom:6px}
.sec-title p{color:var(--gray-text);font-size:14px}
.logo-roll{overflow:hidden}
.logo-track{display:flex;width:max-content;gap:60px;align-items:center;color:#999;font-size:18px}
.logo-track.animate{animation:scroll 20s linear infinite}
@keyframes scroll{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

/* 通用区块 */
.section{padding:70px 0}
.section.bg{background:var(--gray-bg)}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{border:1px solid #eee;border-radius:12px;padding:20px}
.card:hover{box-shadow:0 2px 12px rgba(0,0,0,0.06)}
.card .icon{width:44px;height:44px;background:#e8f0ff;color:var(--primary);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:12px}
.card h3{font-size:16px;margin-bottom:8px}
.card p{font-size:14px;color:var(--gray-text)}
.card-white{background:#fff;text-align:center}

/* 表格 */
.table-wrap{overflow-x:auto}
.table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;font-size:14px}
.table th,.table td{padding:12px;text-align:left;border-bottom:1px solid #eee}
.table th{background:var(--primary);color:#fff}
.table td{text-align:center}
.table tr td:first-child{text-align:left}

/* CTA */
.cta{padding:70px 0;background:var(--primary);color:#fff;text-align:center}
.cta h2{font-size:20px;margin-bottom:10px}
.cta p{opacity:0.85;margin-bottom:30px;font-size:14px}
.cta-btns{display:flex;justify-content:center;flex-wrap:wrap;gap:12px}
.cta .btn-white{background:#fff;color:var(--primary);padding:12px 24px;border-radius:8px;font-weight:500}
.cta .btn-trans{border:1px solid #fff;padding:12px 20px;border-radius:8px}

/* 页脚 */
.footer{padding:60px 0;background:#222;color:#aaa;font-size:14px}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.footer h4{color:#fff;margin-bottom:14px;font-size:16px}
.footer li{margin-bottom:8px}
.footer a:hover{color:#fff}
.footer-bottom{margin-top:40px;padding-top:24px;border-top:1px solid #333;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* 滚动渐显 */
.fade{opacity:0;transform:translateY(20px);transition:all .5s ease}
.fade.show{opacity:1;transform:translateY(0)}

/* 响应式 */
@media (max-width:768px){
    .pc-nav{display:none}
    .menu-btn{display:block}
    .hero-row{grid-template-columns:1fr}
    .hero-img{display:none}
    .grid4{grid-template-columns:repeat(2,1fr)}
    .grid3{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:480px){
    .grid4{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr}
}