:root {
  --bg: #0b1220;
  --bg2: #101a2e;
  --card: #14213a;
  --line: #23365a;
  --fg: #e8eefc;
  --muted: #9db0d4;
  --accent: #3ec6ff;
  --accent2: #7c5cff;
  --ok: #3ddc97;
  --warn: #ffb454;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  background: var(--bg); color: var(--fg); line-height: 1.7;
}
a { color: var(--accent); text-decoration: none; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* 导航 */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(11, 18, 32, .85); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { font-weight: 800; font-size: 20px; letter-spacing: 1px; }
.brand b { color: var(--accent); }
.nav-links { display: flex; gap: 28px; }
.nav-links a { color: var(--muted); font-size: 15px; }
.nav-links a:hover { color: var(--fg); }
.nav-cta { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #04121f !important; padding: 8px 16px; border-radius: 999px; font-weight: 700; }

/* Hero */
.hero { padding: 90px 0 70px; background:
  radial-gradient(600px 300px at 80% 0%, rgba(124, 92, 255, .18), transparent),
  radial-gradient(500px 260px at 10% 10%, rgba(62, 198, 255, .14), transparent);
}
.hero h1 { font-size: clamp(30px, 5vw, 48px); font-weight: 800; line-height: 1.25; }
.hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--accent), var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { color: var(--muted); font-size: 17px; max-width: 640px; margin: 18px 0 30px; }
.btn { display: inline-block; background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #04121f; font-weight: 700; padding: 12px 26px; border-radius: 999px; font-size: 16px; }
.btn.ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); margin-left: 10px; }
.hero-tags { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 10px; }
.hero-tags span { background: var(--card); border: 1px solid var(--line); padding: 6px 14px; border-radius: 999px; font-size: 13px; color: var(--muted); }

/* 区块通用 */
.section { padding: 70px 0; }
.section-head { margin-bottom: 40px; }
.section-head .kicker { color: var(--accent); font-size: 14px; letter-spacing: 3px; font-weight: 700; }
.section-head h2 { font-size: clamp(24px, 3.4vw, 34px); margin-top: 6px; }
.section-head p { color: var(--muted); margin-top: 10px; max-width: 620px; }

/* 服务卡片 */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; transition: transform .2s, border-color .2s; }
.card:hover { transform: translateY(-4px); border-color: rgba(62, 198, 255, .5); }
.card .ic { font-size: 30px; }
.card h3 { margin: 14px 0 8px; font-size: 20px; }
.card p { color: var(--muted); font-size: 14.5px; }
.card .price { margin-top: 14px; font-weight: 800; font-size: 22px; color: var(--accent); }
.card .price small { font-size: 13px; color: var(--muted); font-weight: 400; }
.card .more { display: inline-block; margin-top: 14px; font-size: 14px; }

/* 优势 */
.why { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; }
.why .item { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.why .item b { display: block; margin-bottom: 6px; color: var(--fg); }
.why .item span { color: var(--muted); font-size: 14px; }

/* 流程 */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 14px; counter-reset: st; }
.steps .step { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; position: relative; }
.steps .step::before { counter-increment: st; content: counter(st); position: absolute; top: -10px; left: 14px; background: var(--accent); color: #04121f; font-weight: 800; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font-size: 14px; }
.steps .step b { display: block; margin-top: 8px; }
.steps .step span { color: var(--muted); font-size: 13.5px; }

/* CTA */
.cta { text-align: center; padding: 60px 20px; border: 1px solid var(--line); border-radius: 18px; background: linear-gradient(135deg, rgba(62,198,255,.08), rgba(124,92,255,.08)); }
.cta h2 { font-size: clamp(24px, 3.4vw, 32px); }
.cta p { color: var(--muted); margin: 12px 0 24px; }

/* 页脚 */
.footer { border-top: 1px solid var(--line); padding: 34px 0; color: var(--muted); font-size: 13.5px; }
.footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

/* 页面头 */
.pagehead { padding: 60px 0 30px; }
.pagehead h1 { font-size: clamp(26px, 4vw, 38px); }
.pagehead p { color: var(--muted); margin-top: 8px; max-width: 680px; }

/* 表格 */
table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14.5px; }
th, td { border: 1px solid var(--line); padding: 11px 14px; text-align: left; }
th { background: var(--bg2); color: var(--fg); }
td { color: var(--muted); }
td b { color: var(--fg); }

/* 表单 */
form { max-width: 620px; }
label { display: block; margin: 16px 0 6px; font-size: 14px; color: var(--muted); }
input, select, textarea { width: 100%; background: var(--bg2); border: 1px solid var(--line); color: var(--fg); padding: 12px 14px; border-radius: 10px; font-size: 15px; font-family: inherit; }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--accent); }
textarea { min-height: 120px; resize: vertical; }
.hint { font-size: 13px; color: var(--muted); margin-top: 6px; }

/* 博客 */
.post { padding: 26px 0; border-bottom: 1px solid var(--line); }
.post time { color: var(--muted); font-size: 13px; }
.post h3 { margin: 6px 0; }
.post p { color: var(--muted); font-size: 14.5px; }

@media (max-width: 640px) {
  .nav-links { gap: 14px; }
  .nav-links a:not(.nav-cta) { font-size: 13.5px; }
  .hero { padding: 60px 0 40px; }
  .section { padding: 50px 0; }
}