:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --line: #dde6ef;
  --text: #13263b;
  --muted: #5b6e83;
  --brand: #1b6cff;
  --brand-soft: #e9f1ff;
  --accent: #00a06e;
  --shadow: 0 20px 45px rgba(12, 33, 63, 0.1);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 450px at 20% -10%, #dbe9ff 0%, transparent 70%),
    radial-gradient(1000px 320px at 100% -20%, #d8f6ee 0%, transparent 72%),
    var(--bg);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

main {
  padding: 0 6vw 72px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(244, 247, 251, 0.85);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 6vw;
}

.brand {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.4px;
}

.nav-links {
  display: flex;
  gap: 20px;
  color: var(--muted);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 999px;
  padding: 10px 18px;
  background: linear-gradient(135deg, #307bff, #1b6cff);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 10px 26px rgba(27, 108, 255, 0.28);
}

.btn:hover {
  filter: brightness(1.04);
}

.btn.ghost {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--line);
  box-shadow: none;
}

.landing {
  padding-top: 40px;
}

.consult-hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  align-items: stretch;
}

.hero-copy,
.wechat-card,
.step-card,
.feature-card,
.download-card,
.auth-card,
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 28px;
}

.hero-badge {
  display: inline-flex;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
}

.hero-copy h1 {
  margin: 14px 0 12px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
}

.hero-copy p {
  margin: 0;
  color: var(--muted);
}

.hero-actions {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-note {
  margin-top: 16px;
  font-size: 15px;
}

.wechat-card {
  padding: 24px;
  display: grid;
  gap: 10px;
  align-content: start;
}

.wechat-title {
  font-size: 13px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.wechat-id {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--accent);
}

.wechat-card p {
  margin: 0;
  color: var(--muted);
}

.wechat-card img {
  margin-top: 8px;
  width: 100%;
  max-width: 220px;
}

.section-title h2 {
  margin: 0;
  font-size: 28px;
}

.steps,
.trust,
.download {
  margin-top: 34px;
}

.step-grid,
.trust,
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.step-card,
.feature-card {
  padding: 20px;
}

.step-card h3,
.feature-card h3,
.card h3 {
  margin: 0 0 8px;
}

.step-card p,
.feature-card p,
.card p {
  margin: 0;
  color: var(--muted);
}

.download-card {
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.download-card h2 {
  margin: 0 0 6px;
}

.download-card p {
  margin: 0;
  color: var(--muted);
}

.auth {
  display: grid;
  place-items: center;
  padding: 44px 6vw 72px;
}

.auth-card {
  width: min(430px, 90vw);
  padding: 28px;
}

.auth-card form {
  display: grid;
  gap: 12px;
}

.auth-card input,
.auth-card textarea,
.auth-card select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px 12px;
  font: inherit;
}

.auth-links {
  margin-top: 12px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
}

.auth-hint {
  margin-top: 12px;
  color: var(--muted);
}

.dashboard {
  padding-top: 34px;
}

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

.badge {
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 600;
}

.badge.vip {
  color: #fff;
  background: linear-gradient(135deg, #00b37d, #009c6c);
}

.badge.normal {
  color: #275f49;
  background: #dff8ee;
}

.card {
  padding: 20px;
}

.stat {
  font-size: 24px;
  font-weight: 700;
}

.stat-sub {
  margin-top: 6px;
  color: var(--muted);
}

.flash {
  margin: 16px 0;
  padding: 11px 14px;
  border-radius: 12px;
  border: 1px solid transparent;
}

.flash-error {
  background: #ffe9e9;
  border-color: #ffc9c9;
  color: #a43838;
}

.flash-success {
  background: #e9fff5;
  border-color: #b9f1d7;
  color: #0a6f4d;
}

.site-footer {
  padding: 30px 6vw;
  color: #d6e4f6;
  background: linear-gradient(160deg, #17273a, #102033);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.footer-title {
  margin-bottom: 8px;
  font-weight: 700;
}

.footer-grid a {
  display: block;
  margin-bottom: 4px;
}

.footer-note,
.footer-bottom {
  color: #9eb1c8;
}

.footer-bottom {
  margin-top: 20px;
  font-size: 12px;
}

@media (max-width: 820px) {
  .nav-links {
    display: none;
  }

  .brand {
    font-size: 20px;
  }
}