:root {
  --brand: #0e9f8f;
  --brand-dark: #07796d;
  --brand-soft: #e6f7f5;
  --accent: #2b6cf6;
  --ink: #0f2430;
  --muted: #5b7180;
  --line: #e4ecf1;
  --bg: #ffffff;
  --bg-soft: #f7fbfc;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(16, 60, 80, .08);
  --shadow-sm: 0 2px 10px rgba(16, 60, 80, .06);
  --max: 1180px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-dark); }
img, svg { max-width: 100%; }
h1, h2, h3, h4 { line-height: 1.35; margin: 0 0 .6em; font-weight: 700; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
ul { padding-left: 1.1em; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.center { text-align: center; }
.mt0 { margin-top: 0; }
.mb0 { margin-bottom: 0; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 28px; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: var(--ink); }
.logo-mark {
  width: 32px; height: 32px; border-radius: 9px; flex: none;
  background: linear-gradient(135deg, var(--brand) 0%, #37c7bd 60%, var(--accent) 100%);
  display: grid; place-items: center; color: #fff; font-size: 15px; font-weight: 800;
}
.nav-links { display: flex; gap: 22px; margin-left: 8px; }
.nav-links a { color: var(--muted); font-weight: 500; font-size: 14.5px; padding: 6px 0; position: relative; }
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--brand); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px;
  background: var(--brand); border-radius: 2px;
}
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border-radius: 10px; border: 1px solid transparent;
  font-weight: 600; font-size: 14.5px; cursor: pointer; transition: .18s;
  background: var(--brand); color: #fff;
}
.btn:hover { background: var(--brand-dark); color: #fff; transform: translateY(-1px); }
.btn.ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--brand); color: var(--brand); }
.btn.light { background: rgba(255,255,255,.16); color: #fff; border-color: rgba(255,255,255,.35); }
.btn.light:hover { background: rgba(255,255,255,.26); color: #fff; }
.btn.sm { padding: 7px 13px; font-size: 13px; border-radius: 8px; }
.btn.danger { background: #fff; color: #d2453d; border-color: #f2ccc9; }
.btn.danger:hover { background: #d2453d; color: #fff; }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: radial-gradient(1200px 500px at 80% -10%, #dff5f2 0%, transparent 60%),
              linear-gradient(180deg, #f4fbfa 0%, #ffffff 70%);
  padding: 76px 0 56px;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; padding: 5px 12px; border-radius: 999px;
  background: var(--brand-soft); color: var(--brand-dark); font-size: 12.5px; font-weight: 600;
  border: 1px solid #cdecf7; margin-bottom: 18px;
}
.hero h1 { font-size: 40px; letter-spacing: -.02em; }
.hero .lead { font-size: 16.5px; color: var(--muted); margin-bottom: 26px; }
.hero-stats { display: flex; gap: 34px; margin-top: 34px; flex-wrap: wrap; }
.hero-stats div b { display: block; font-size: 22px; color: var(--ink); }
.hero-stats div span { font-size: 13px; color: var(--muted); }

.code-card {
  background: #0d2233; color: #d7e6ef; border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden; font-size: 13px;
}
.code-head { display: flex; align-items: center; gap: 8px; padding: 11px 14px; background: #0a1a27; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: #2c4256; }
.code-head span { margin-left: 8px; font-size: 12.5px; color: #7e9bb1; }
pre { margin: 0; padding: 16px; overflow-x: auto; font-family: "JetBrains Mono", Consolas, Menlo, monospace; line-height: 1.75; }
pre .k { color: #7fd1c1; }
pre .s { color: #ffd28a; }
pre .c { color: #5b7b91; }

/* ---------- 区块 ---------- */
section { padding: 66px 0; }
section.soft { background: var(--bg-soft); border-block: 1px solid var(--line); }
.sec-head { max-width: 720px; margin: 0 auto 40px; text-align: center; }
.sec-head h2 { font-size: 28px; }
.sec-head p { color: var(--muted); margin: 0; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-sm); transition: .2s;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #cfe6e2; }
.card h3 { font-size: 17px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
.card .more { display: inline-block; margin-top: 14px; font-size: 14px; font-weight: 600; }

.algo-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; }
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: var(--brand-soft); color: var(--brand-dark);
}
.badge.blue { background: #e9f0ff; color: #244bb5; }
.badge.grey { background: #eef2f5; color: var(--muted); }
.badge.green { background: #e4f7ec; color: #1a7f45; }
.badge.amber { background: #fff4e0; color: #96651a; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.tags span { font-size: 12px; color: var(--muted); background: #f3f7f9; padding: 3px 9px; border-radius: 6px; }
.metric-row { display: flex; gap: 18px; margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--line); }
.metric-row div b { font-size: 16px; }
.metric-row div span { font-size: 12px; color: var(--muted); display: block; }

.icon-box {
  width: 42px; height: 42px; border-radius: 11px; display: grid; place-items: center;
  background: var(--brand-soft); color: var(--brand-dark); margin-bottom: 14px;
}

.steps { counter-reset: s; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.step { position: relative; }
.step::before {
  counter-increment: s; content: counter(s);
  display: grid; place-items: center; width: 30px; height: 30px; border-radius: 9px;
  background: var(--brand); color: #fff; font-weight: 700; font-size: 14px; margin-bottom: 12px;
}
.step h4 { margin-bottom: 4px; font-size: 15.5px; }
.step p { color: var(--muted); font-size: 13.5px; margin: 0; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: #f6fafb; font-weight: 600; font-size: 13px; color: var(--muted); }
tbody tr:hover { background: #fbfdfd; }
.table-wrap { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
code {
  background: #f1f5f8; padding: 1.5px 6px; border-radius: 5px; font-size: 13px;
  font-family: "JetBrains Mono", Consolas, Menlo, monospace; color: #0b5a6f;
}

.plan { display: flex; flex-direction: column; }
.plan.hot { border-color: var(--brand); box-shadow: 0 14px 40px rgba(14, 159, 143, .16); }
.plan .price { font-size: 30px; font-weight: 800; margin: 6px 0 2px; }
.plan .unit { color: var(--muted); font-size: 13px; }
.plan ul { list-style: none; padding: 0; margin: 18px 0 22px; flex: 1; }
.plan li { font-size: 14px; color: var(--muted); padding: 6px 0 6px 22px; position: relative; }
.plan li::before { content: "✓"; position: absolute; left: 0; color: var(--brand); font-weight: 700; }

.faq { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; overflow: hidden; }
details + details { border-top: 1px solid var(--line); }
summary { cursor: pointer; padding: 15px 18px; font-weight: 600; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: var(--brand); font-weight: 700; }
details[open] summary::after { content: "−"; }
details p { margin: 0; padding: 0 18px 16px; color: var(--muted); font-size: 14px; }

.cta-band {
  background: linear-gradient(120deg, #0e9f8f 0%, #1276b8 100%);
  color: #fff; border-radius: 20px; padding: 44px; text-align: center;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: rgba(255,255,255,.85); }

/* ---------- 表单 ---------- */
.form { display: grid; gap: 14px; }
label { font-size: 13.5px; font-weight: 600; display: block; margin-bottom: 6px; }
input[type=text], input[type=email], input[type=password], select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 14.5px; font-family: inherit; background: #fff; color: var(--ink);
}
input:focus, select:focus, textarea:focus { outline: 2px solid #b9e7e1; border-color: var(--brand); }
.alert { padding: 10px 14px; border-radius: 10px; font-size: 14px; background: #fdecec; color: #b33a33; border: 1px solid #f6d4d1; }
.notice { padding: 12px 14px; border-radius: 10px; font-size: 13.5px; background: var(--brand-soft); color: var(--brand-dark); border: 1px solid #c7ebe5; }
.notice.amber { background: #fff4e0; color: #96651a; border-color: #f2dfb6; }
.plan-pick { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 10px; }
.plan-opt { display: flex; gap: 8px; align-items: flex-start; border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; cursor: pointer; }
.plan-opt b { margin-right: 6px; }
.algo-pick { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 8px; }
.algo-opt { display: flex; gap: 6px; align-items: center; border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; cursor: pointer; font-size: 14px; }
textarea { width: 100%; padding: 9px 11px; border: 1px solid var(--line); border-radius: 8px; font: inherit; resize: vertical; }

/* ---------- 文档页 ---------- */
.docs-layout { display: grid; grid-template-columns: 220px 1fr; gap: 36px; align-items: start; }
.docs-nav { position: sticky; top: 88px; }
.docs-nav a { display: block; padding: 7px 0; color: var(--muted); font-size: 14px; }
.docs-nav a:hover { color: var(--brand); }
.doc-block { padding-bottom: 34px; }
.doc-block h3 { font-size: 20px; margin-top: 0; }

/* ---------- 控制台 ---------- */
.console { display: grid; grid-template-columns: 216px 1fr; gap: 30px; padding: 30px 0 60px; align-items: start; }
.side { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; padding: 10px; position: sticky; top: 88px; }
.side a { display: block; padding: 10px 12px; border-radius: 9px; color: var(--muted); font-size: 14.5px; font-weight: 500; }
.side a:hover { background: var(--bg-soft); color: var(--ink); }
.side a.active { background: var(--brand-soft); color: var(--brand-dark); font-weight: 600; }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 22px; flex-wrap: wrap; }
.page-head h1 { font-size: 24px; margin: 0; }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 22px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.stat span { font-size: 12.5px; color: var(--muted); }
.stat b { display: block; font-size: 26px; margin-top: 2px; }
.stat small { color: var(--muted); font-size: 12px; }

.panel { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; margin-bottom: 20px; }
.panel-head { padding: 14px 18px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.panel-head h3 { margin: 0; font-size: 15.5px; }
.panel-body { padding: 18px; }

.chart { display: flex; align-items: flex-end; gap: 4px; height: 130px; padding-top: 8px; }
.chart .bar { flex: 1; background: linear-gradient(180deg, #3fc9b8, #0e9f8f); border-radius: 4px 4px 0 0; min-height: 2px; position: relative; }
.chart .bar:hover::after {
  content: attr(data-label); position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%);
  background: #0d2233; color: #fff; font-size: 11.5px; padding: 3px 7px; border-radius: 6px; white-space: nowrap;
}
.chart-axis { display: flex; gap: 4px; margin-top: 6px; }
.chart-axis span { flex: 1; text-align: center; font-size: 10px; color: var(--muted); overflow: hidden; }

.progress { height: 8px; background: #eef3f5; border-radius: 999px; overflow: hidden; }
.progress i { display: block; height: 100%; background: linear-gradient(90deg, #3fc9b8, #0e9f8f); }
.kv { display: flex; gap: 28px; flex-wrap: wrap; font-size: 14px; }
.kv b { display: block; font-size: 18px; }

.key-box {
  font-family: "JetBrains Mono", Consolas, Menlo, monospace; font-size: 13px;
  background: #0d2233; color: #b8f0e6; padding: 12px 14px; border-radius: 10px; word-break: break-all;
}
.mono { font-family: "JetBrains Mono", Consolas, Menlo, monospace; font-size: 13px; }

/* ---------- 页脚 ---------- */
footer { background: #0d2233; color: #9db6c7; padding: 50px 0 28px; margin-top: 20px; }
footer h4 { color: #fff; font-size: 14.5px; margin-bottom: 12px; }
footer a { color: #9db6c7; display: block; font-size: 13.5px; padding: 4px 0; }
footer a:hover { color: #fff; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 30px; }
.foot-bottom { border-top: 1px solid #1c3446; margin-top: 34px; padding-top: 18px; font-size: 12.5px; }
.disclaimer { color: #7f98aa; font-size: 12.5px; max-width: 860px; }

@media (max-width: 960px) {
  .hero-grid, .docs-layout, .console, .foot-grid { grid-template-columns: 1fr; }
  .grid-3, .grid-4, .steps, .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 31px; }
  .side, .docs-nav { position: static; }
  .nav-links { display: none; }
}
@media (max-width: 620px) {
  .grid-3, .grid-4, .steps, .stat-grid, .grid-2 { grid-template-columns: 1fr; }
  section { padding: 48px 0; }
  .cta-band { padding: 30px 20px; }
}