:root{
  --blue:#1d4ed8;
  --blue-deep:#0b1437;
  --blue-mid:#2563eb;
  --blue-light:#3b82f6;
  --cyan:#22d3ee;
  --bg:#f4f7fe;
  --text:#1f2937;
  --muted:#64748b;
  --card:#ffffff;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;
}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}

/* 顶栏 */
.topbar{
  background:rgba(11,20,55,.92);backdrop-filter:blur(8px);color:#fff;
  position:sticky;top:0;z-index:50;box-shadow:0 2px 16px rgba(11,20,55,.25);
}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px}
.logo{display:inline-flex;align-items:center;justify-content:center;height:34px;width:auto}
.logo img{height:34px;width:auto;max-width:180px;object-fit:contain}
.nav a{color:#dbe4ff;text-decoration:none;margin-left:24px;font-size:15px;opacity:.9;transition:.15s}
.nav a:hover{opacity:1;color:#fff}

/* Hero */
.hero{position:relative;color:#fff;text-align:center;padding:84px 20px 100px;overflow:hidden;
  background:linear-gradient(135deg,#0b1437 0%,#1d4ed8 60%,#2563eb 100%);}
.hero-bg{position:absolute;inset:0;
  background:
    radial-gradient(620px 320px at 18% 8%,rgba(34,211,238,.25),transparent 60%),
    radial-gradient(520px 300px at 86% 82%,rgba(59,130,246,.35),transparent 60%);}
.hero .wrap{position:relative}
/* Hero LOGO 图: 小白底刚好包住图形 */
.hero-logo{margin:0 auto 18px;display:inline-block;background:#fff;padding:8px;border-radius:12px;box-shadow:0 12px 40px rgba(0,0,0,.35)}.hero-logo img{display:block;width:auto;height:auto;max-height:240px;max-width:280px;object-fit:contain}
.eyebrow{letter-spacing:3px;font-size:12px;color:#9fc1ff;margin-bottom:14px;text-transform:uppercase}
.hero h1{font-size:52px;font-weight:800;letter-spacing:2px;margin-bottom:12px;
  background:linear-gradient(90deg,#fff,#bfe0ff);-webkit-background-clip:text;background-clip:text;color:transparent;}
.slogan{font-size:20px;font-weight:600;color:#e8f1ff;margin-bottom:18px;letter-spacing:1px}
.sub{font-size:16px;color:#cdd9f5;opacity:.95;margin-bottom:22px}
.hero-tags{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:30px}
.tag{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);color:#eaf2ff;
  padding:7px 18px;border-radius:999px;font-size:14px;font-weight:600;letter-spacing:.5px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 30px;border-radius:10px;font-size:16px;font-weight:600;text-decoration:none;transition:.18s}
.btn-primary{background:#fff;color:var(--blue)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,0,0,.22)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.65);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14)}

/* 通用区块 */
.section-title{text-align:center;font-size:28px;font-weight:800;margin-bottom:14px;color:var(--blue-deep)}
.section-sub{text-align:center;color:var(--muted);font-size:15px;margin-bottom:38px}
.about-brief{max-width:720px;margin:0 auto;text-align:center;color:#475569;font-size:16px;line-height:1.7}

/* 关于 */
.about{padding:72px 0 50px}
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center}
.about-text p{margin-bottom:16px;color:#475569;font-size:15.5px}
.about-stats{display:grid;grid-template-columns:1fr;gap:16px}
.stat{background:var(--card);border:1px solid #e6edff;border-radius:14px;padding:18px 22px;box-shadow:0 4px 16px rgba(11,20,55,.05)}
.stat .num{font-size:30px;font-weight:800;color:var(--blue);line-height:1.1}
.stat .label{font-size:13px;color:var(--muted);margin-top:4px}

/* 平台理念卡片 */
.platform{padding:40px 0 70px;background:linear-gradient(180deg,#fff 0%,#f4f7fe 100%)}
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:22px}
.card{background:var(--card);border-radius:16px;padding:30px 24px;border:1px solid #eaf0ff;
  box-shadow:0 6px 20px rgba(11,20,55,.06);transition:.2s}
.card:hover{transform:translateY(-5px);box-shadow:0 16px 34px rgba(29,78,216,.18);border-color:var(--blue-light)}
.card-icon{font-size:36px;margin-bottom:14px}
.card h3{font-size:19px;margin-bottom:10px;color:var(--blue)}
.card p{font-size:14px;color:var(--muted)}

/* 愿景 */
.vision{background:linear-gradient(135deg,#0b1437,#1d4ed8);color:#fff;text-align:center;padding:70px 20px}
.vision blockquote{font-size:26px;font-weight:700;line-height:1.6;max-width:760px;margin:0 auto 18px}
.vision-sign{color:#a9c4ff;font-size:15px}

/* 联系 */
.contact{padding:70px 0}
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;max-width:920px;margin:0 auto}
.contact-item{background:var(--card);border:1px solid #e6edff;border-radius:14px;padding:20px 22px}
.c-label{display:block;font-size:13px;color:var(--blue);font-weight:600;margin-bottom:6px}
.c-val{font-size:15px;color:#334155}

/* 页脚 */
.footer{background:var(--blue-deep);color:#cbd5e1;padding:28px 0;font-size:14px}
.footer .wrap{display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center}
.foot-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:center}
.footer a{color:#93c5fd;text-decoration:none}
.footer a:hover{text-decoration:underline}
.foot-sep{color:#64748b}

@media(max-width:760px){
  .hero h1{font-size:36px}.slogan{font-size:17px}.about-grid{grid-template-columns:1fr}
  .nav a{margin-left:14px;font-size:14px}.topbar .wrap{height:56px}
  .vision blockquote{font-size:20px}.hero-logo{padding:6px;border-radius:10px}.hero-logo img{max-height:200px;max-width:240px}
}