:root{
  --ink:#131c26; --body:#2c3844; --mut:#68758a; --line:#e3e9ef;
  --acc:#0f766e; --acc-d:#0b5a54; --bg:#ffffff; --soft:#f4f7f9;
  --hero1:#0d1b2a; --hero2:#103b3a; --radius:14px;
  --shadow:0 1px 2px rgba(16,32,48,.05),0 10px 30px -12px rgba(16,32,48,.14);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--body);background:var(--bg);line-height:1.8;font-size:16px;-webkit-font-smoothing:antialiased}
.wrap{max-width:920px;margin:0 auto;padding:0 22px}
a{color:var(--acc);text-decoration:none}
a:hover{text-decoration:underline}

/* header */
header{position:sticky;top:0;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:10}
.hd{display:flex;justify-content:space-between;align-items:center;padding:15px 0}
.logo{font-weight:800;font-size:21px;letter-spacing:.2px;color:var(--ink);text-decoration:none}
.logo span{color:var(--acc)}
.logo:hover{text-decoration:none}
nav a{color:var(--mut);text-decoration:none;margin-left:26px;font-size:15px;font-weight:500}
nav a:hover{color:var(--ink);text-decoration:none}

/* hero */
.hero{background:linear-gradient(128deg,var(--hero1) 0%,var(--hero2) 92%);color:#eef4f3;margin:0 0 8px}
.hero .wrap{padding-top:56px;padding-bottom:52px}
.hero h1{color:#fff;font-size:40px;line-height:1.3;margin:0 0 16px;letter-spacing:.5px}
.hero .lede{font-size:19px;color:#cfe0dc;max-width:44em;margin:0 0 14px}
.hero p{color:#b9cdc9;max-width:46em}
.hero p strong,.hero .k{color:#fff}
.hero a{color:#7fe3d2;font-weight:600}
.stats{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.stat{border:1px solid rgba(255,255,255,.22);border-radius:12px;padding:10px 18px;min-width:132px;background:rgba(255,255,255,.05)}
.stat b{display:block;font-size:24px;color:#fff;line-height:1.25;font-weight:800}
.stat i{font-style:normal;font-size:13px;color:#a9c4bf}

/* main */
main{padding:30px 0 10px}
main .wrap{padding-top:6px}
h1{font-size:33px;line-height:1.35;margin:6px 0 14px;color:var(--ink);letter-spacing:.3px}
h2{font-size:22px;margin:44px 0 12px;color:var(--ink);padding-top:6px;letter-spacing:.2px}
h2::before{content:"";display:block;width:34px;height:3px;border-radius:2px;background:var(--acc);margin-bottom:12px}
.hero h2::before{display:none}
h3{font-size:17px;margin:8px 0 6px;color:var(--ink)}
p{margin:10px 0}
.lede{font-size:18px;color:#3c4a58}
.mut{color:var(--mut)}
.card{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin:18px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(248px,1fr));gap:16px;margin:18px 0}
.grid .card{margin:0;background:#fff;box-shadow:var(--shadow);border-color:var(--line);transition:transform .15s ease,box-shadow .15s ease}
.grid .card:hover{transform:translateY(-3px);box-shadow:0 2px 4px rgba(16,32,48,.06),0 16px 38px -12px rgba(16,32,48,.2)}
ul{margin:8px 0 8px 20px;padding:0}
li{margin:6px 0}
li::marker{color:var(--acc)}
.tag{display:inline-block;font-size:12px;font-weight:700;color:var(--acc-d);background:#e6f4f1;border:1px solid #bfe3dc;border-radius:20px;padding:2px 11px;margin-bottom:10px;letter-spacing:1px}
table{border-collapse:separate;border-spacing:0;width:100%;margin:16px 0;font-size:15px;border:1px solid var(--line);border-radius:12px;overflow:hidden}
th,td{padding:11px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
tr:last-child td{border-bottom:none}
th{background:var(--soft);color:var(--ink);font-weight:700}
strong.k{color:var(--ink)}
.btn{display:inline-block;background:var(--acc);color:#fff;font-weight:700;padding:11px 24px;border-radius:10px;margin-top:14px}
.btn:hover{background:var(--acc-d);text-decoration:none}

/* footer */
footer{background:var(--hero1);color:#9db4ad;margin-top:56px;padding:30px 0 36px;font-size:14px}
footer a{color:#cfe0dc}
footer p{margin:6px 0}
.note{font-size:14px;color:var(--mut)}
footer .note{color:#7e948c}
@media (max-width:640px){
  .hero h1{font-size:30px}
  h1{font-size:27px}
  nav a{margin-left:16px}
  .stat{min-width:108px;padding:8px 14px}
}