:root {
  color-scheme: light;
  --bg: #f6f7fb;
  --panel: rgba(255, 255, 255, 0.86);
  --text: #1f2937;
  --muted: #667085;
  --line: rgba(31, 41, 55, 0.12);
  --primary: #3d7c78;
  --primary-dark: #275d59;
  --accent: #8b6fd6;
  --shadow: 0 24px 80px rgba(41, 52, 75, 0.12);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(135deg, rgba(101, 184, 176, 0.18), transparent 35%),
    linear-gradient(225deg, rgba(139, 111, 214, 0.14), transparent 38%),
    var(--bg);
}

a {
  color: inherit;
}

.site-header,
.site-footer {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-header {
  padding: 22px 0;
}

.site-footer {
  padding: 28px 0 36px;
  color: var(--muted);
}

.brand,
.top-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand {
  text-decoration: none;
  font-weight: 800;
  font-size: 18px;
}

.brand-mark {
  display: inline-grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

.top-nav a,
.text-button {
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  text-decoration: none;
  cursor: pointer;
}

.hero,
.section,
.info-band,
.admin-shell,
.version-card,
.versions-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  min-height: 520px;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  align-items: center;
  gap: 44px;
  padding: 42px 0 28px;
}

.hero h1,
.admin-panel h1 {
  margin: 0;
  font-size: clamp(44px, 7vw, 88px);
  line-height: 1;
  letter-spacing: 0;
}

.intro {
  max-width: 560px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.8;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 800;
}

.actions,
.panel-title {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.actions {
  margin-top: 30px;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.primary-button {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 12px 28px rgba(61, 124, 120, 0.24);
}

.secondary-button {
  color: var(--primary-dark);
  background: rgba(255, 255, 255, 0.76);
  border-color: var(--line);
}

.mascot-card {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 32px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.mascot-card img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: center;
}

.section {
  padding: 44px 0;
}

.section-heading h2,
.info-band h2,
.table-grid h2 {
  margin: 0;
  font-size: 28px;
  line-height: 1.25;
  letter-spacing: 0;
}

.feature-grid,
.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.feature-grid article,
.metric-grid article,
.info-band,
.admin-panel {
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: 0 18px 52px rgba(41, 52, 75, 0.08);
  backdrop-filter: blur(16px);
}

.feature-grid article {
  min-height: 150px;
  padding: 22px;
}

.feature-grid h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.feature-grid p,
.info-band p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.info-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
  padding: 28px;
}

.version-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 18px;
  padding: 24px 28px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: 0 18px 52px rgba(41, 52, 75, 0.08);
  backdrop-filter: blur(16px);
}

.version-card h2,
.versions-hero h1 {
  margin: 0;
  letter-spacing: 0;
}

.version-card p:last-child {
  margin: 8px 0 0;
  color: var(--muted);
}

.versions-shell {
  padding: 32px 0 56px;
}

.versions-hero {
  max-width: 760px;
}

.versions-hero h1 {
  font-size: clamp(42px, 7vw, 72px);
  line-height: 1;
}

.version-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.version-summary article,
.changelog-item {
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: 0 18px 52px rgba(41, 52, 75, 0.08);
  backdrop-filter: blur(16px);
}

.version-summary article {
  padding: 20px;
}

.version-summary span {
  display: block;
  color: var(--muted);
  font-weight: 700;
}

.version-summary strong {
  display: block;
  margin-top: 8px;
  font-size: 28px;
}

.changelog-list {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.changelog-item {
  padding: 24px 28px;
}

.changelog-item h2 {
  margin: 0;
  font-size: 24px;
}

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

.changelog-title span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  color: var(--primary-dark);
  background: rgba(61, 124, 120, 0.12);
  font-size: 13px;
  font-weight: 800;
}

.changelog-item ul {
  margin: 14px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.8;
}

.changelog-item.current {
  border-color: rgba(61, 124, 120, 0.24);
}

.back-home {
  margin: 28px 0 0;
}

.admin-shell {
  padding: 30px 0 56px;
}

.admin-panel {
  padding: 28px;
}

.panel-title {
  justify-content: space-between;
  margin-bottom: 18px;
}

.login-form {
  display: grid;
  gap: 16px;
  max-width: 420px;
  margin-top: 24px;
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 700;
}

input {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0 14px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.82);
  font: inherit;
}

.message {
  min-height: 24px;
  margin: 16px 0 0;
  color: var(--muted);
}

.message.error {
  color: #b42318;
}

.message.success {
  color: var(--primary-dark);
}

.metric-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metric-grid article {
  padding: 18px;
}

.metric-grid span {
  display: block;
  color: var(--muted);
  font-size: 14px;
}

.metric-grid strong {
  display: block;
  margin-top: 8px;
  font-size: 26px;
}

.table-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 26px;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}

th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-size: 13px;
}

tr:last-child td {
  border-bottom: 0;
}

.hidden {
  display: none;
}

@media (max-width: 860px) {
  .hero,
  .info-band,
  .table-grid,
  .version-summary {
    grid-template-columns: 1fr;
  }

  .version-card,
  .changelog-title {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    min-height: auto;
    padding-top: 20px;
  }

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

@media (max-width: 560px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero h1,
  .admin-panel h1 {
    font-size: 44px;
  }

  .intro {
    font-size: 17px;
  }

  .feature-grid,
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .admin-panel {
    padding: 20px;
  }
}