:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --panel: #fff;
  --line: #d8e0ea;
  --text: #172033;
  --muted: #5e6c82;
  --accent: #0f766e;
  --accent-2: #1d4ed8;
  --soft: #e8f5f2;
  --warn: #9a3412;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  letter-spacing: 0;
}

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

.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.nav {
  max-width: 1180px;
  margin: 0 auto;
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 0 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  min-width: 205px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: #0f766e;
  color: #fff;
  font-weight: 800;
}

.nav-links {
  display: flex;
  gap: 4px;
  flex: 1;
  align-items: center;
}

.nav-links a {
  padding: 8px 10px;
  border-radius: 7px;
  color: #334155;
  font-size: 14px;
}

.nav-links a.active,
.nav-links a:hover {
  background: #e8f5f2;
  color: #0f766e;
}

.nav-menu-button {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 38px;
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: #334155;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.nav-menu-button i {
  color: #0f766e;
  font-size: 18px;
}

.nav-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 20px 44px;
  flex: 1;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: 30px;
  align-items: center;
  min-height: calc(100vh - 170px);
  padding: 18px 0 30px;
}

.hero h1 {
  margin: 8px 0 14px;
  font-size: 44px;
  line-height: 1.12;
  font-weight: 800;
}

.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
  max-width: 620px;
}

.eyebrow {
  color: #0f766e;
  font-size: 13px;
  font-weight: 700;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.hero-visual {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 10px;
  box-shadow: 0 18px 50px rgba(16, 24, 40, 0.12);
}

.hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 6px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: 1px solid var(--line);
  border-radius: 7px;
  min-height: 38px;
  padding: 8px 13px;
  font-weight: 600;
  background: #fff;
  color: #1f2937;
  white-space: nowrap;
}

.btn-primary {
  background: #0f766e;
  border-color: #0f766e;
  color: #fff;
}

.btn-outline {
  background: #fff;
}

.btn.disabled {
  opacity: 0.55;
  pointer-events: none;
}

.w-100 {
  width: 100%;
}

.metric-band {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 26px;
}

.metric-band div,
.section,
.status-panel,
.price-card,
.feature-card,
.auth-box {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04);
}

.metric-band div {
  padding: 14px;
}

.metric-band strong {
  display: block;
  color: #0f766e;
  font-size: 18px;
  margin-bottom: 5px;
}

.metric-band span,
.muted {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 18px;
  align-items: start;
}

h1 {
  margin: 0;
  font-size: 32px;
  line-height: 1.2;
}

h2 {
  margin: 0 0 12px;
  font-size: 18px;
  line-height: 1.35;
}

p {
  line-height: 1.75;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.feature-card {
  padding: 16px;
  min-height: 135px;
}

.feature-card i {
  color: #0f766e;
  font-size: 24px;
  margin-bottom: 10px;
}

.feature-card strong {
  display: block;
  margin-bottom: 6px;
}

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

.status-panel,
.section,
.price-card,
.auth-box {
  padding: 18px;
}

.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.price-card {
  min-height: 250px;
}

.price-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.price-head h2 {
  margin: 0;
}

.plan-badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 8px;
  border-radius: 999px;
  background: #e8f5f2;
  color: #0f766e;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.price {
  font-size: 30px;
  font-weight: 800;
  color: #0f766e;
  margin: 8px 0 12px;
}

.price span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}

.clean-list {
  margin: 0;
  padding-left: 18px;
  color: #344054;
  line-height: 1.9;
}

.kv {
  margin: 0;
  display: grid;
  gap: 8px;
}

.kv div {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 12px;
  border-bottom: 1px solid #edf1f6;
  padding: 7px 0;
}

.kv dt {
  color: var(--muted);
}

.kv dd {
  margin: 0;
  word-break: break-all;
}

.safety-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 18px;
  border-color: #b7d7d2;
  background: #f8fcfb;
}

.safety-panel p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.safety-kv code {
  display: inline-block;
  max-width: 100%;
  padding: 3px 6px;
  border: 1px solid #d8e0ea;
  border-radius: 6px;
  background: #fff;
  color: #0f172a;
  white-space: normal;
  overflow-wrap: anywhere;
}

.legal h2 {
  margin-top: 18px;
}

.legal h2:first-child {
  margin-top: 0;
}

.account-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 18px;
}

.account-tabs a,
.account-tabs button {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 7px;
  padding: 8px 12px;
  color: #334155;
}

.account-tabs a.active {
  background: #e8f5f2;
  color: #0f766e;
  border-color: #a8d8cf;
}

.account-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}

.stat {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}

.stat span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 7px;
}

.stat strong {
  font-size: 24px;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.section-title h2 {
  margin: 0;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.hint-box {
  border: 1px solid #bfdbfe;
  background: #eff6ff;
  color: #1e3a8a;
  border-radius: 7px;
  padding: 10px 12px;
  margin: 0 0 14px;
}

.notice {
  border: 1px solid #a7f3d0;
  background: #ecfdf5;
  color: #065f46;
  border-radius: 7px;
  padding: 10px 12px;
  margin: 0 0 14px;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 7px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th,
td {
  padding: 9px 10px;
  border-bottom: 1px solid #edf1f6;
  text-align: left;
  white-space: nowrap;
}

th {
  background: #f2f5f9;
  color: #334155;
  font-weight: 700;
}

.auth-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 430px;
  gap: 28px;
  align-items: center;
  min-height: calc(100vh - 170px);
}

.auth-copy h1 {
  font-size: 38px;
  margin-bottom: 12px;
}

.auth-copy p {
  color: var(--muted);
  font-size: 16px;
}

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

label {
  display: grid;
  gap: 6px;
  color: #475467;
  font-size: 13px;
}

input,
select,
textarea {
  border: 1px solid var(--line);
  border-radius: 7px;
  min-height: 38px;
  padding: 8px 10px;
  font: inherit;
  background: #fff;
}

textarea {
  resize: vertical;
  min-height: 84px;
}

.alert {
  border: 1px solid #f5b5ad;
  background: #fff5f3;
  color: #b42318;
  border-radius: 7px;
  padding: 10px 12px;
  margin-bottom: 12px;
}

.footer {
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 18px 20px;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 980px) {
  .hero,
  .split,
  .auth-layout {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero h1 {
    font-size: 34px;
  }

  .hero-visual {
    order: -1;
  }

  .metric-band,
  .account-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pricing-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .two-col,
  .safety-panel,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .download-actions {
    justify-content: flex-start;
    width: 100%;
  }
}

@media (max-width: 720px) {
  .nav {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 8px 10px;
    padding: 10px 14px;
  }

  .brand {
    min-width: 0;
    order: 1;
  }

  .nav-menu-button {
    display: inline-flex;
    order: 3;
  }

  .nav-links {
    display: none;
    grid-column: 1 / -1;
    order: 3;
    width: 100%;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 16px 38px rgba(16, 24, 40, 0.08);
    overflow: hidden;
  }

  body.nav-open .nav-links {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4px;
    order: 4;
  }

  .nav-links a {
    min-height: 42px;
    display: flex;
    align-items: center;
  }

  .nav-actions {
    order: 2;
    margin-left: 0;
  }

  .container {
    padding: 20px 14px 34px;
  }

  .metric-band,
  .feature-grid,
  .pricing-grid,
  .account-stats {
    grid-template-columns: 1fr;
  }

  .page-head,
  .section-title {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-inner {
    flex-direction: column;
  }
}