:root{
  --blue-600:#2563eb; --blue-700:#1d4ed8; --blue-50:#eef4ff;
  --cyan:#22d3ee; --cyan-soft:#67e8f9;
  --ink:#0b1220; --gray:#5b6b82; --line:#e3e9f2; --bg:#ffffff;
  --dark:#070d18; --dark-2:#0d1626;
  --radius:16px; --shadow:0 18px 50px rgba(11,18,32,.12);
  --mono:ui-monospace,"SFMono-Regular","JetBrains Mono",Menlo,Consolas,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
.container{max-width:1120px;margin:0 auto;padding:0 24px}
a{text-decoration:none;color:inherit}

/* 导航 */
.nav{position:sticky;top:0;background:rgba(7,13,24,.86);backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.09);z-index:100}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:#fff;letter-spacing:.5px}
.logo-mark{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,var(--cyan),var(--blue-600));display:inline-block;box-shadow:0 0 18px rgba(34,211,238,.55)}
.nav-links{display:flex;gap:32px}
.nav-links a{font-size:15px;color:#9fb0c7;transition:color .2s;position:relative;padding:4px 0}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--cyan);transition:width .25s}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-links a:hover,.nav-links a.active{color:#fff}
.menu-btn{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.menu-btn span{width:22px;height:2px;background:#fff;border-radius:2px;transition:.3s}
.menu-btn.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn.open span:nth-child(2){opacity:0}
.menu-btn.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* Hero —— 深色网格 + 光晕 */
.hero{position:relative;padding:130px 0 110px;color:#fff;overflow:hidden;
  background:
    radial-gradient(900px 480px at 78% 8%,rgba(34,211,238,.22),transparent 62%),
    radial-gradient(700px 420px at 12% 92%,rgba(37,99,235,.34),transparent 65%),
    linear-gradient(180deg,#070d18,#0b1524 70%,#070d18);
}
.hero::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%);
  pointer-events:none;
}
.hero .container{position:relative;z-index:2}
.hero-tag{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12.5px;letter-spacing:1.5px;color:var(--cyan-soft);background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.35);border-radius:999px;padding:6px 16px;margin-bottom:26px}
.hero-tag::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.25}}
.hero h1{font-size:52px;line-height:1.18;letter-spacing:-1.2px;font-weight:800}
.hero h1 em{font-style:normal;background:linear-gradient(100deg,var(--cyan),#7dd3fc 55%,#93c5fd);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin:24px 0 36px;max-width:580px;color:#a9b8cc;font-size:17px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-metrics{display:flex;gap:44px;flex-wrap:wrap;margin-top:64px;padding-top:32px;border-top:1px solid rgba(255,255,255,.1)}
.hero-metrics div strong{display:block;font-family:var(--mono);font-size:26px;color:#fff;letter-spacing:-.5px}
.hero-metrics div span{font-size:13px;color:#7e8fa6}

/* 按钮 */
.btn{display:inline-block;padding:13px 30px;border-radius:11px;font-size:15px;font-weight:600;transition:.25s;cursor:pointer;border:none}
.btn-primary{background:linear-gradient(120deg,var(--cyan),#3b82f6);color:#03121f;box-shadow:0 8px 26px rgba(34,211,238,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(34,211,238,.42)}
.btn-ghost{background:transparent;color:#dbeafe;border:1px solid rgba(255,255,255,.28)}
.btn-ghost:hover{border-color:var(--cyan);color:#fff;background:rgba(34,211,238,.08)}
.btn-block{width:100%}

/* 区块 */
.section{padding:90px 0}
.section-alt{background:#f5f8fd;position:relative}
.section-title{font-size:32px;text-align:center;margin-bottom:12px;letter-spacing:-.6px;font-weight:800}
.section-title.left{text-align:left}
.section-desc{text-align:center;color:var(--gray);margin-bottom:52px;max-width:620px;margin-left:auto;margin-right:auto}
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:1fr 1fr}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* 统计 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat strong{font-family:var(--mono);font-size:36px;color:var(--ink);display:block;letter-spacing:-1px}
.stat strong span{font-size:16px;margin-left:2px;color:var(--cyan)}
.stat p{color:var(--gray);font-size:14px;margin-top:4px}

/* 卡片 */
.card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 28px;transition:.3s;overflow:hidden}
.card::after{content:"";position:absolute;left:0;top:0;width:100%;height:3px;background:linear-gradient(90deg,var(--cyan),var(--blue-600));transform:scaleX(0);transform-origin:left;transition:transform .35s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#cfe0f5}
.card:hover::after{transform:scaleX(1)}
.card-icon{width:48px;height:48px;border-radius:13px;background:linear-gradient(140deg,#e6f6ff,#eaf0ff);color:var(--blue-700);font-size:22px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;border:1px solid #d7e6fb}
.card h3{font-size:18px;margin-bottom:10px;letter-spacing:-.2px}
.card p{color:var(--gray);font-size:14.5px}

/* 页头 */
.page-hero{position:relative;padding:96px 0 84px;text-align:center;color:#fff;overflow:hidden;
  background:
    radial-gradient(700px 340px at 50% 0%,rgba(34,211,238,.24),transparent 70%),
    linear-gradient(180deg,#070d18,#0c1728);
}
.page-hero::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:52px 52px;
  mask-image:radial-gradient(circle at 50% 0%,#000,transparent 75%);
  -webkit-mask-image:radial-gradient(circle at 50% 0%,#000,transparent 75%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{font-size:42px;letter-spacing:-1px;font-weight:800}
.page-hero p{color:#9fb0c7;margin-top:12px}

/* 企业信息卡 */
.fact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px}
.fact-card h3{margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.fact-card dl{display:grid;grid-template-columns:auto 1fr;gap:10px 20px;font-size:14.5px}
.fact-card dt{color:var(--gray);white-space:nowrap}
.fact-card dd{font-weight:500}

/* 时间线 */
.timeline{max-width:680px;margin:0 auto;position:relative;padding-left:8px}
.tl-item{display:flex;gap:24px;padding:26px 0 26px 22px;border-left:2px solid var(--line);position:relative}
.tl-item::before{content:"";position:absolute;left:-7px;top:34px;width:12px;height:12px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(34,211,238,.18)}
.tl-item:last-child{border-left-color:transparent}
.tl-year{flex-shrink:0;width:78px;font-family:var(--mono);font-weight:700;color:var(--blue-700);font-size:17px}
.tl-item h3{font-size:17px;margin-bottom:4px}
.tl-item p{color:var(--gray);font-size:14.5px}

/* 步骤 */
.step{text-align:center;padding:28px 18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:.3s}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.step span{font-family:var(--mono);font-size:26px;font-weight:800;color:#b9d4f2}
.step h3{margin:8px 0 6px;font-size:16px}
.step p{color:var(--gray);font-size:13.5px}

/* CTA */
.cta-box{position:relative;overflow:hidden;background:linear-gradient(135deg,#08111f,#0f2138 55%,#123056);border:1px solid rgba(34,211,238,.25);border-radius:22px;padding:60px 40px;text-align:center;color:#fff}
.cta-box::before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(34,211,238,.28),transparent 68%);top:-190px;right:-110px;pointer-events:none}
.cta-box h2{font-size:29px;margin-bottom:10px;position:relative;letter-spacing:-.5px}
.cta-box p{color:#a9b8cc;margin-bottom:28px;position:relative}
.cta-box .btn-primary{position:relative}

/* 联系页 */
.contact-item{padding:18px 0;border-bottom:1px solid var(--line)}
.contact-item strong{display:block;color:var(--blue-700);font-size:13px;letter-spacing:1px;font-family:var(--mono);margin-bottom:4px}
.contact-item p{color:var(--ink);font-size:15px}
.contact-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow)}
.contact-form h3{margin-bottom:20px}
.contact-form label{display:block;font-size:14px;font-weight:600;margin-bottom:16px}
.contact-form input,.contact-form textarea{width:100%;margin-top:6px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:14px;font-family:inherit;transition:border .2s,box-shadow .2s;background:#fbfcfe}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--blue-600);box-shadow:0 0 0 3px rgba(37,99,235,.12);background:#fff}
.form-tip{margin-top:14px;font-size:13px;color:#0e9f6e;text-align:center;opacity:0;transition:.3s}
.form-tip.show{opacity:1}

/* 页脚 */
.footer{background:var(--dark);color:#8b9cb3;padding:60px 0 32px;margin-top:0;border-top:1px solid rgba(255,255,255,.08)}
.footer-inner{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap}
.footer-logo{color:#fff;font-weight:700;font-size:17px;margin-bottom:8px}
.footer a{transition:color .2s}
.footer a:hover{color:var(--cyan)}
.footer-links{display:flex;gap:24px}
.copyright{width:100%;border-top:1px solid rgba(255,255,255,.08);padding-top:24px;font-size:13px}

/* 动画 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.visible{opacity:1;transform:none}

/* 响应式 */
@media(max-width:860px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-2{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .hero{padding:96px 0 80px}
  .hero h1{font-size:36px}
  .hero-metrics{gap:28px;margin-top:48px}
  .page-hero h1{font-size:32px}
  .menu-btn{display:flex}
  .nav-links{position:absolute;top:66px;left:0;right:0;background:#070d18;flex-direction:column;gap:0;border-bottom:1px solid rgba(255,255,255,.1);max-height:0;overflow:hidden;transition:max-height .3s}
  .nav-links.open{max-height:260px}
  .nav-links a{padding:15px 24px;border-top:1px solid rgba(255,255,255,.08)}
  .nav-links a::after{display:none}
}
@media(max-width:520px){
  .grid-4{grid-template-columns:1fr}
  .section{padding:60px 0}
  .hero h1{font-size:30px}
  .cta-box{padding:42px 24px}
  .hero-metrics div strong{font-size:22px}
}