:root{
  --ink:#0A2540; --ink-2:#123A57; --body:#3E5566; --muted:#6B7F8D;
  --teal:#0E7C86; --teal-d:#0A5C63; --mint:#E8F4F2; --mint-2:#F4FAF9;
  --line:#DCE7EA; --white:#fff; --bg:#F7FAFB;
  --warn:#B45309; --warn-bg:#FEF6E7; --danger:#B42318;
  --shadow:0 1px 2px rgba(10,37,64,.04),0 12px 32px rgba(10,37,64,.06);
  --shadow-lg:0 2px 6px rgba(10,37,64,.06),0 24px 60px rgba(10,37,64,.10);
  --r:16px; --r-sm:10px;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--body);font-family:var(--sans);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{color:var(--ink);font-weight:700;line-height:1.3;margin:0;letter-spacing:-.01em}
h1{font-size:clamp(30px,4.4vw,50px);letter-spacing:-.02em}
h2{font-size:clamp(24px,2.8vw,34px)}
h3{font-size:19px}
p{margin:0}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}
img,svg{max-width:100%}
.wrap{width:min(1160px,calc(100% - 48px));margin:0 auto}
.sec{padding:84px 0}
.sec--tight{padding:56px 0}
.sec--white{background:var(--white)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--teal);opacity:.6}
.lead{font-size:17px;color:var(--body);max-width:760px;margin-top:14px}
.center{text-align:center}
.center .lead{margin-left:auto;margin-right:auto}

/* ---------- header ---------- */
.hdr{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.86);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.hdr__in{display:flex;align-items:center;gap:26px;height:70px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);letter-spacing:-.01em}
.brand span small{display:block;font-size:10.5px;font-weight:600;letter-spacing:.12em;color:var(--muted);text-transform:uppercase}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{color:var(--ink-2);font-size:14.5px;padding:8px 12px;border-radius:8px;text-decoration:none}
.nav a:hover{background:var(--mint);color:var(--teal-d)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:999px;font-size:14.5px;font-weight:600;border:1px solid transparent;cursor:pointer;text-decoration:none;transition:.18s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn--p{background:var(--teal);color:#fff;box-shadow:0 6px 18px rgba(14,124,134,.28)}
.btn--p:hover{background:var(--teal-d)}
.btn--g{border-color:var(--line);color:var(--ink);background:#fff}
.btn--g:hover{border-color:var(--teal);color:var(--teal-d)}
.menu{display:none}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(900px 420px at 88% -10%,rgba(18,181,160,.20),transparent 62%),
  radial-gradient(680px 380px at 6% 110%,rgba(14,124,134,.16),transparent 60%),
  linear-gradient(150deg,#08203a 0%,#0A2E4A 46%,#0B4A5C 100%);
  color:#D9E8EF}
.hero::after{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:56px 56px;mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 78%);pointer-events:none}
.hero__in{position:relative;z-index:2;padding:92px 0 104px}
.hero h1{color:#fff;max-width:920px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#5FE0C8,#8FD8FF);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{margin-top:22px;max-width:760px;font-size:17.5px;color:#B7CFDB}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}
.hero .btn--g{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.28);color:#EAF6FA}
.hero .btn--g:hover{background:rgba(255,255,255,.16);color:#fff;border-color:rgba(255,255,255,.5)}
.ecg{position:absolute;right:-40px;top:58px;width:720px;opacity:.16;z-index:1}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.16);border-radius:16px;overflow:hidden;margin-top:56px;position:relative;z-index:2}
.stats div{background:rgba(8,32,58,.45);padding:20px 22px;backdrop-filter:blur(4px)}
.stats b{display:block;color:#fff;font-size:26px;letter-spacing:-.02em}
.stats span{font-size:12.5px;color:#9FBECC;letter-spacing:.02em}

/* ---------- cards ---------- */
.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(--r);padding:26px;box-shadow:var(--shadow);transition:.2s}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:#C8DDE2}
.card .ico{width:42px;height:42px;border-radius:12px;background:var(--mint);display:grid;place-items:center;margin-bottom:14px;color:var(--teal-d)}
.card h3{margin-bottom:8px}
.card p{font-size:14.5px;color:var(--body)}
.card ul{margin:12px 0 0;padding-left:18px;font-size:14px;color:var(--muted)}
.card ul li{margin:5px 0}
.tag{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.06em;color:var(--teal-d);background:var(--mint);border-radius:6px;padding:3px 9px;margin-bottom:10px}

/* ---------- steps ---------- */
.steps{counter-reset:s;display:grid;gap:18px;grid-template-columns:repeat(4,1fr)}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px 22px 22px;box-shadow:var(--shadow)}
.step::before{counter-increment:s;content:"0" counter(s);position:absolute;right:18px;top:14px;font-family:var(--mono);font-size:13px;color:#B9CDD4;letter-spacing:.08em}
.step h3{font-size:16.5px;margin-bottom:6px}
.step p{font-size:14px;color:var(--muted)}

/* ---------- pricing ---------- */
.price{display:grid;gap:18px;grid-template-columns:repeat(4,1fr);align-items:stretch}
.plan{position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px 22px;box-shadow:var(--shadow)}
.plan--hot{border-color:var(--teal);box-shadow:0 12px 40px rgba(14,124,134,.16)}
.plan--hot::before{content:"推荐";position:absolute;top:-11px;left:22px;background:var(--teal);color:#fff;font-size:11.5px;font-weight:700;letter-spacing:.1em;padding:2px 10px;border-radius:999px}
.plan h3{font-size:17px}
.plan .price-n{font-size:28px;font-weight:800;color:var(--ink);margin:12px 0 2px;letter-spacing:-.02em}
.plan .price-n small{font-size:13px;font-weight:600;color:var(--muted)}
.plan .desc{font-size:13.5px;color:var(--muted);min-height:40px}
.plan ul{list-style:none;padding:0;margin:16px 0 0;font-size:14px;flex:1}
.plan li{padding:7px 0 7px 22px;position:relative;border-top:1px dashed #E8EFF1}
.plan li:first-child{border-top:0}
.plan li::before{content:"";position:absolute;left:2px;top:16px;width:6px;height:6px;border-radius:50%;background:var(--teal);opacity:.55}

/* ---------- table ---------- */
.tbl{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;font-size:14.5px}
.tbl th{background:#F1F7F8;color:var(--ink);text-align:left;font-weight:700;padding:13px 16px;border-bottom:1px solid var(--line);white-space:nowrap}
.tbl td{padding:12px 16px;border-bottom:1px solid #EDF3F4;vertical-align:top}
.tbl tr:last-child td{border-bottom:0}
.tbl td:first-child{color:var(--ink);font-weight:600}

/* ---------- callout ---------- */
.note{border-left:3px solid var(--teal);background:var(--mint-2);border-radius:0 12px 12px 0;padding:18px 20px;font-size:14.5px}
.note--warn{border-left-color:#D97706;background:var(--warn-bg)}
.note b{color:var(--ink)}
.mono{font-family:var(--mono);font-size:13px;background:#0F2A3D;color:#CBE7EE;border-radius:12px;padding:18px 20px;overflow:auto;line-height:1.7}

/* ---------- faq ---------- */
details.qa{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0;margin-bottom:10px;overflow:hidden}
details.qa summary{cursor:pointer;list-style:none;padding:16px 20px;font-weight:600;color:var(--ink);position:relative;font-size:15px}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary::after{content:"+";position:absolute;right:20px;top:14px;color:var(--teal);font-weight:700;font-size:18px}
details.qa[open] summary::after{content:"–"}
details.qa .a{padding:0 20px 18px;font-size:14.5px;color:var(--body)}

/* ---------- footer ---------- */
.ftr{background:#08203A;color:#9FB6C4;padding:56px 0 26px;font-size:13.5px}
.ftr a{color:#C7DCE5}
.ftr h4{color:#fff;font-size:14px;margin-bottom:12px;letter-spacing:.02em}
.ftr__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px}
.ftr ul{list-style:none;padding:0;margin:0}
.ftr li{margin:7px 0}
.ftr__legal{margin-top:34px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:12.5px;color:#7E97A6;line-height:1.8}

/* ---------- misc ---------- */
.pill{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:13px;color:var(--ink-2);margin:0 8px 8px 0}
.kpi{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.kpi .card{padding:22px}
.kpi b{display:block;font-size:30px;color:var(--teal-d);letter-spacing:-.02em}
.kpi span{font-size:13px;color:var(--muted)}
.hr{height:1px;background:var(--line);margin:44px 0}
.two{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:start}
.list-check{list-style:none;padding:0;margin:18px 0 0;font-size:15px}
.list-check li{position:relative;padding:8px 0 8px 30px;border-bottom:1px dashed #E8EFF1}
.list-check li:last-child{border-bottom:0}
.list-check li::before{content:"";position:absolute;left:0;top:15px;width:16px;height:9px;border-left:2px solid var(--teal);border-bottom:2px solid var(--teal);transform:rotate(-45deg)}

@media (max-width:1024px){
  .g4,.price,.steps{grid-template-columns:repeat(2,1fr)}
  .ftr__grid{grid-template-columns:1fr 1fr}
  .two{grid-template-columns:1fr;gap:28px}
  .ecg{display:none}
}
@media (max-width:720px){
  .wrap{width:calc(100% - 32px)}
  .sec{padding:56px 0}
  .g2,.g3,.g4,.price,.steps,.kpi,.stats{grid-template-columns:1fr}
  .nav{display:none}
  .menu{display:inline-flex}
  .hero__in{padding:64px 0 72px}
  .ftr__grid{grid-template-columns:1fr}
}