:root {
  --bg: #ffffff;
  --text: #0b1020;
  --muted: rgba(11, 16, 32, 0.65);
  --card: rgba(255, 255, 255, 0.92);
  --border: rgba(11, 16, 32, 0.12);
  --shadow: 0 10px 25px rgba(11, 16, 32, 0.08);
  --primary: #2a74ff;
  --primary2: #42a5ff;
  --primary3: #7bd1ff;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

.top-gradient {
  background: linear-gradient(180deg, rgba(42, 116, 255, 0.95) 0%, rgba(66, 165, 255, 0.88) 35%, rgba(123, 209, 255, 0.35) 70%, rgba(255, 255, 255, 0) 100%);
  padding: 28px 0 18px;
}

.container {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  color: #fff;
  text-decoration: none;
}

.brand .logo {
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.5px;
}

.brand .name {
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.95);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.nav-links a:hover {
  background: rgba(255, 255, 255, 0.25);
}

.hero {
  margin: 26px 0 10px;
  color: #fff;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
}

.hero h1 {
  margin: 0 0 10px;
  font-size: 34px;
  line-height: 1.15;
}

.hero p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.92);
}

.hero .badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.18);
  font-weight: 700;
  font-size: 13px;
}

.hero .right {
  display: flex;
  justify-content: flex-end;
}

.hero-card {
  width: 100%;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 16px;
  padding: 14px 14px 12px;
}

.hero-card .title {
  font-weight: 800;
  font-size: 14px;
  margin: 0 0 10px;
}

.hero-card .kv {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.hero-card .kv .k {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 4px;
}

.hero-card .kv .v {
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 0.2px;
}

.main {
  padding: 18px 0 56px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
}

.card {
  grid-column: span 6;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  box-shadow: var(--shadow);
}

.card h2 {
  margin: 0 0 10px;
  font-size: 18px;
  letter-spacing: 0.2px;
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
  font-size: 14px;
}

.list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.75;
  font-size: 14px;
}

.wide {
  grid-column: span 12;
}

.cta-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 800;
  font-size: 14px;
}

.button.primary {
  color: #fff;
  background: linear-gradient(90deg, var(--primary), var(--primary2));
}

.button.ghost {
  color: var(--primary);
  background: rgba(42, 116, 255, 0.08);
  border: 1px solid rgba(42, 116, 255, 0.22);
}

.doc {
  padding: 22px 0 56px;
}

.doc h1 {
  margin: 18px 0 8px;
  font-size: 26px;
}

.doc .meta {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 14px;
}

.doc .content {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  box-shadow: var(--shadow);
}

.doc .content h2 {
  margin: 18px 0 8px;
  font-size: 17px;
}

.doc .content p, .doc .content li {
  color: var(--muted);
  line-height: 1.8;
  font-size: 14px;
}

.doc .content ul {
  margin: 8px 0 0;
  padding-left: 18px;
}

.footer {
  border-top: 1px solid rgba(11, 16, 32, 0.08);
  padding: 18px 0;
  background: #fff;
}

.footer .row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.footer .left {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.footer .right {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.footer a {
  color: rgba(11, 16, 32, 0.7);
  text-decoration: none;
  font-weight: 650;
  font-size: 13px;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(11, 16, 32, 0.04);
  border: 1px solid rgba(11, 16, 32, 0.08);
}

.footer a:hover {
  background: rgba(11, 16, 32, 0.06);
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .hero .right {
    justify-content: flex-start;
  }
  .card {
    grid-column: span 12;
  }
}