:root{
  --text:#0f172a; --muted:#475569; --muted2:#64748b;
  --line2:#eef2f7; --line:#e5e7eb;
  --brand:#2563eb; --brand2:#1d4ed8; --ok:#16a34a;
  --radius:18px; --shadow:0 12px 28px rgba(2,6,23,.08);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:radial-gradient(1200px 800px at 30% 0%, #eef6ff 0%, #ffffff 60%);
  color:var(--text);
  font:16px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{width:min(1120px,92vw);margin:0 auto}
.small{font-size:13px;color:var(--muted2)}
header{
  position:sticky;top:0;z-index:10;
  backdrop-filter:saturate(180%) blur(10px);
  background:rgba(255,255,255,.75);
  border-bottom:1px solid var(--line2);
}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:14px}
.brand{display:flex;align-items:center;gap:12px;color:var(--text);font-weight:800}
.logo{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,#60a5fa,#2563eb);box-shadow:0 10px 22px rgba(37,99,235,.25)}
.navlinks{display:flex;gap:14px;flex-wrap:wrap;align-items:center;justify-content:flex-end}
.navlinks a{color:var(--muted);font-weight:700}
.navlinks a.active{color:var(--text)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  border-radius:999px;padding:12px 16px;border:1px solid var(--line);
  background:#fff;color:var(--text);font-weight:800;cursor:pointer;
  transition:transform .06s ease, box-shadow .2s ease, border-color .2s ease;
}
.btn:hover{border-color:#cbd5e1;box-shadow:0 10px 20px rgba(2,6,23,.06)}
.btn:active{transform:translateY(1px)}
.btn.primary{background:linear-gradient(180deg,var(--brand),var(--brand2));color:#fff;border-color:transparent;box-shadow:0 12px 26px rgba(37,99,235,.22)}
.btn.primary:hover{box-shadow:0 16px 30px rgba(37,99,235,.26)}
.badge{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border:1px solid var(--line2);border-radius:999px;background:#fff}
.badge .dot{width:10px;height:10px;border-radius:999px;background:var(--ok)}
.hero{padding:30px 0 18px}
.heroGrid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}
@media (max-width:880px){.heroGrid{grid-template-columns:1fr}}
.card0{border:1px solid var(--line2);background:rgba(255,255,255,.82);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.hTitle{font-size:36px;line-height:1.15;margin:10px 0}
.hSub{margin:0 0 12px;color:var(--muted)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:10px}
@media (max-width:720px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:440px){.steps{grid-template-columns:1fr}}
.step{border:1px solid var(--line2);border-radius:14px;padding:12px;background:#fff}
.step .n{width:26px;height:26px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;background:#eff6ff;color:#1d4ed8;font-weight:900;margin-bottom:8px}
.kv{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}
@media (max-width:560px){.kv{grid-template-columns:1fr}}
.kv .item{border:1px solid var(--line2);border-radius:14px;padding:12px;background:#fff}
.kv .item b{display:block;font-size:14px}
.kv .item span{color:var(--muted);font-size:13px}
.section{padding:14px 0 24px}
.section h2{margin:0 0 12px;font-size:22px}
.section p{margin:8px 0;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media (max-width:960px){.grid{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.grid{grid-template-columns:1fr}}
.card{border:1px solid var(--line2);border-radius:18px;padding:16px;background:#fff}
.card .head{display:flex;align-items:center;justify-content:space-between;gap:10px}
.card h3{margin:0;font-size:16px}
.pill{font-size:12px;padding:6px 10px;border-radius:999px;border:1px solid var(--line2);background:#f8fafc;color:var(--muted2)}
.price{margin:10px 0 8px;font-size:34px;font-weight:950}
.price small{font-size:14px;color:var(--muted2);font-weight:800}
.ul{margin:10px 0 14px;padding-left:18px;color:var(--muted)}
.hr{height:1px;background:var(--line2);margin:10px 0}
.notice{border:1px dashed #c7d2fe;background:#eff6ff;border-radius:16px;padding:12px 14px;color:#1e3a8a}
.notice b{color:var(--text)}
.table{width:100%;border-collapse:collapse;border:1px solid var(--line2);border-radius:16px;overflow:hidden;background:#fff}
.table th,.table td{padding:10px 12px;border-bottom:1px solid var(--line2);text-align:left;vertical-align:top}
.table th{background:#f8fafc;font-size:13px;color:var(--muted)}
.table tr:last-child td{border-bottom:none}
.phone{border:1px solid var(--line2);border-radius:26px;padding:14px;background:linear-gradient(180deg,#fff,#fbfdff);box-shadow:var(--shadow)}
.phone .screen{border:1px solid #e2e8f0;border-radius:18px;padding:14px;background:#fff;min-height:280px}
.tag{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;border:1px solid var(--line2);background:#fff;font-size:12px;color:var(--muted)}
.toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);background:#0b1220;color:#fff;padding:10px 14px;border-radius:999px;box-shadow:0 14px 30px rgba(2,6,23,.25);font-size:13px;opacity:0;pointer-events:none;transition:opacity .18s ease, transform .18s ease}
.toast.show{opacity:1;transform:translateX(-50%) translateY(-4px)}
.footer{margin-top:20px;padding:22px 0 28px;border-top:1px solid var(--line2);color:var(--muted2)}
.footerGrid{display:grid;grid-template-columns:1.2fr .8fr;gap:16px}
@media (max-width:860px){.footerGrid{grid-template-columns:1fr}}
.listlinks{display:flex;gap:12px;flex-wrap:wrap;margin-top:10px}
kbd{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;background:#f1f5f9;padding:2px 6px;border-radius:8px;border:1px solid #e2e8f0;font-size:12px}