:root { --ink:#1f2d3d; --muted:#5f6368; --line:#e4e7ed; --blue:#1a73e8; --bg:#f7f9fc; }
* { box-sizing: border-box; }
body { margin:0; font-family: -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif; color:var(--ink); background:#fff; line-height:1.6; }
a { color: var(--blue); text-decoration: none; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
nav.top { border-bottom:1px solid var(--line); background:#fff; position:sticky; top:0; z-index:5; }
nav.top .wrap { display:flex; align-items:center; gap:22px; height:60px; }
.logo { font-weight:800; font-size:19px; color:var(--ink); display:flex; align-items:center; gap:8px; }
.logo i { font-style:normal; background:var(--blue); color:#fff; width:28px; height:28px; border-radius:7px; display:inline-flex; align-items:center; justify-content:center; font-size:16px; }
nav.top .links { margin-left:auto; display:flex; gap:20px; align-items:center; font-size:15px; }
nav.top .links a { color:var(--muted); }
.btn { display:inline-block; padding:10px 20px; border-radius:8px; font-weight:600; border:1px solid var(--blue); }
.btn.primary { background:var(--blue); color:#fff !important; }
.btn.ghost { color:var(--blue) !important; background:#fff; }
.hero { background: linear-gradient(135deg,#1f2d3d 0%,#2b4c7e 100%); color:#fff; padding:80px 0 70px; }
.hero h1 { font-size:42px; line-height:1.2; margin:0 0 14px; }
.hero p.lead { font-size:19px; opacity:.9; max-width:720px; margin:0 0 6px; }
.hero p.cn { opacity:.75; margin:0 0 28px; }
.hero .btn.ghost { background:transparent; color:#fff !important; border-color:rgba(255,255,255,.6); }
section { padding:64px 0; }
section.alt { background:var(--bg); }
h2 { font-size:30px; margin:0 0 6px; }
h2 + .cn { color:var(--muted); margin:0 0 30px; }
.grid3 { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:18px; }
.feat { background:#fff; border:1px solid var(--line); border-radius:12px; padding:22px; }
.feat h3 { margin:0 0 6px; font-size:17px; }
.feat p { margin:0; color:var(--muted); font-size:14px; }
.price { background:#fff; border:1px solid var(--line); border-radius:14px; padding:28px 24px; position:relative; }
.price.best { border:2px solid var(--blue); box-shadow:0 8px 26px rgba(26,115,232,.14); }
.price .tag { position:absolute; top:-12px; right:18px; background:var(--blue); color:#fff; font-size:12px; padding:3px 10px; border-radius:10px; }
.price .amt { font-size:40px; font-weight:800; margin:8px 0 0; }
.price .amt small { font-size:15px; color:var(--muted); font-weight:400; }
.price ul { padding-left:18px; color:var(--muted); font-size:14px; line-height:2; }
.note { color:var(--muted); font-size:13px; text-align:center; margin-top:22px; }
.steps { counter-reset: s; display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:18px; }
.steps div { counter-increment:s; padding-left:46px; position:relative; }
.steps div::before { content:counter(s); position:absolute; left:0; top:0; width:32px; height:32px; border-radius:50%; background:var(--blue); color:#fff; display:flex; align-items:center; justify-content:center; font-weight:700; }
.faq details { border-bottom:1px solid var(--line); padding:14px 0; }
.faq summary { cursor:pointer; font-weight:600; }
footer { border-top:1px solid var(--line); padding:28px 0; color:var(--muted); font-size:13px; }
footer .wrap { display:flex; flex-wrap:wrap; gap:14px 24px; align-items:center; }
footer .links { margin-left:auto; display:flex; gap:18px; }
.legal { max-width:820px; margin:0 auto; padding:40px 20px 60px; }
.legal h1 { font-size:32px; margin-bottom:4px; }
.legal h2 { font-size:20px; margin:30px 0 8px; }
.legal p, .legal li { color:#3c4043; }
.legal .meta { color:var(--muted); font-size:14px; }
@media (max-width: 820px) {
  .grid3, .steps { grid-template-columns: minmax(0,1fr); }
  .hero h1 { font-size:30px; }
  nav.top .links a.hide-m { display:none; }
}