:root{
  --ink:#0f1c2e; --ink2:#33445c; --muted:#6b7c93; --line:#e3e8ef;
  --brand:#1d4ed8; --brand2:#6d28d9; --cyan:#0891b2;
  --bg:#ffffff; --soft:#f6f8fb; --soft2:#eef3fa;
  --ok:#0f8a5f; --warn:#b45309; --red:#c02626;
  --radius:14px; --shadow:0 1px 2px rgba(15,28,46,.06),0 8px 24px rgba(15,28,46,.06);
  --max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"Segoe UI",-apple-system,Roboto,Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.25;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:38px} h2{font-size:28px} h3{font-size:21px} h4{font-size:17px}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.muted{color:var(--muted)}
.small{font-size:14px}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{max-width:var(--max);margin:0 auto;padding:12px 24px;display:flex;align-items:center;gap:24px}
.logo{font-weight:800;letter-spacing:-.02em;font-size:18px;color:var(--ink);display:flex;align-items:center;gap:9px}
.logo .dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--brand2),var(--cyan))}
.nav a.n{color:var(--ink2);font-size:15px;font-weight:500}
.nav a.n.on{color:var(--brand)}
.nav .sp{flex:1}
.btn{display:inline-block;padding:10px 18px;border-radius:10px;font-weight:600;font-size:15px;
  background:var(--brand);color:#fff;border:1px solid var(--brand);cursor:pointer}
.btn:hover{background:#1740b8;text-decoration:none}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn.wa{background:#0f8a5f;border-color:#0f8a5f}
.btn.wa:hover{background:#0c6f4d}
.btn.sm{padding:7px 13px;font-size:14px}

/* hero */
.hero{background:linear-gradient(180deg,#f2f6fd 0%,#ffffff 100%);border-bottom:1px solid var(--line)}
.hero .wrap{padding:56px 24px 48px;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:var(--brand2);background:#f1ecfd;padding:5px 11px;border-radius:999px;margin-bottom:16px}
.hero h1{font-size:42px;margin-bottom:14px}
.hero .sub{font-size:18px;color:var(--ink2);max-width:60ch}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
.stats{display:flex;gap:28px;margin-top:28px;flex-wrap:wrap}
.stats div b{display:block;font-size:24px;line-height:1.2}
.stats div span{font-size:13px;color:var(--muted)}
.card-x{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}
.card-x h4{margin-bottom:10px}
.kv{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px dashed var(--line);font-size:14px}
.kv:last-child{border-bottom:0}
.kv b{color:var(--ink)}

/* sections */
section{padding:52px 0}
section.alt{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.lead{color:var(--ink2);max-width:78ch}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.card h4{margin-bottom:6px}
.card p{margin:0;font-size:14.5px;color:var(--ink2)}
.tag{display:inline-block;font-size:12px;font-weight:700;padding:3px 9px;border-radius:999px;
  background:var(--soft2);color:var(--brand2);margin:0 6px 8px 0}
.spec{list-style:none;padding:0;margin:10px 0 0;font-size:14px;color:var(--ink2)}
.spec li{padding:4px 0 4px 18px;position:relative}
.spec li:before{content:"";position:absolute;left:0;top:12px;width:7px;height:7px;border-radius:2px;
  background:linear-gradient(135deg,var(--brand2),var(--cyan))}

/* table */
table{width:100%;border-collapse:collapse;font-size:14.5px;background:#fff}
th,td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
th{background:var(--soft);font-size:13px;text-transform:uppercase;letter-spacing:.04em;color:var(--ink2)}
tbody tr:nth-child(even){background:#fbfcfe}

/* article */
.article{max-width:820px;margin:0 auto}
.article h2{margin-top:38px}
.article h3{margin-top:26px}
.article ul,.article ol{padding-left:22px}
.article li{margin-bottom:6px}
.article .meta{color:var(--muted);font-size:14px;margin-bottom:26px}
.article blockquote{margin:18px 0;padding:12px 18px;background:var(--soft);border-left:4px solid var(--brand2);
  color:var(--ink2);font-size:15px}
.code{background:#0f1c2e;color:#e6edf7;border-radius:10px;padding:14px 16px;font-size:13.5px;
  font-family:Consolas,Monaco,monospace;white-space:pre-wrap;line-height:1.6;overflow-x:auto}
.note{background:#fff8ec;border:1px solid #f5d9a8;border-radius:10px;padding:14px 16px;font-size:14.5px;color:#7a4a08}
.okbox{background:#eefaf4;border:1px solid #b6e5cf;border-radius:10px;padding:14px 16px;font-size:14.5px;color:#0b5c40}

/* form */
.form{display:grid;gap:12px;max-width:560px}
.form input,.form select,.form textarea{width:100%;padding:11px 13px;border:1px solid var(--line);
  border-radius:10px;font:inherit;font-size:15px;background:#fff;color:var(--ink)}
.form input:focus,.form textarea:focus{outline:2px solid #c7d7fb;border-color:var(--brand)}
.form label{font-size:14px;font-weight:600}

footer{background:#0f1c2e;color:#c7d4e6;padding:40px 0;margin-top:0}
footer a{color:#9dc0ff}
footer .wrap{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
footer h4{color:#fff;font-size:15px;margin-bottom:10px}
footer p,footer li{font-size:14px;color:#a9bbd1;margin:0}
footer ul{list-style:none;padding:0}

.placeholder{background:#fff2f2;color:#a11a1a;border:1px dashed #e08a8a;padding:1px 6px;border-radius:5px;font-weight:600}
@media(max-width:900px){
  .hero .wrap{grid-template-columns:1fr;gap:28px;padding:36px 24px}
  .hero h1{font-size:32px}
  .g2,.g3,.g4{grid-template-columns:1fr}
  footer .wrap{grid-template-columns:1fr}
  .nav{gap:14px;flex-wrap:wrap}
}