:root {
  color-scheme: light;
  --bg: #f7f8fb;
  --surface: #ffffff;
  --surface-strong: #eef3f8;
  --text: #17202a;
  --muted: #667085;
  --line: #d8dee8;
  --accent: #0f766e;
  --accent-strong: #115e59;
  --accent-soft: #dff5f1;
  --warning: #9a5b00;
  --warning-soft: #fff4d6;
  --danger: #b42318;
  --danger-soft: #fee4e2;
  --ok: #067647;
  --ok-soft: #dcfae6;
  --shadow: 0 18px 50px rgba(22, 34, 51, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

a {
  color: var(--accent-strong);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.nav {
  max-width: 1160px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand {
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 12px;
  overflow-x: auto;
  scrollbar-width: none;
}

.nav-links a {
  color: #344054;
  font-size: 14px;
  white-space: nowrap;
  padding: 6px 8px;
  border-radius: 6px;
}

.nav-links a:hover {
  background: var(--surface-strong);
  text-decoration: none;
}

.hero {
  background: linear-gradient(180deg, #e7f7f4 0%, #f7f8fb 100%);
  border-bottom: 1px solid var(--line);
}

.hero-inner,
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 34px 20px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  gap: 26px;
  align-items: center;
}

h1,
h2,
h3 {
  line-height: 1.25;
  margin: 0 0 12px;
}

h1 {
  font-size: clamp(32px, 5vw, 56px);
  letter-spacing: 0;
}

h2 {
  font-size: 26px;
}

h3 {
  font-size: 18px;
}

p {
  margin: 0 0 14px;
}

.lead {
  color: #475467;
  font-size: 18px;
  max-width: 760px;
}

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

.badge-row,
.quick-links,
.tool-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge,
.status,
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 9px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 650;
}

.badge {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.tag {
  background: var(--surface-strong);
  color: #344054;
}

.status.ok {
  background: var(--ok-soft);
  color: var(--ok);
}

.status.pending {
  background: var(--warning-soft);
  color: var(--warning);
}

.status.expired {
  background: var(--danger-soft);
  color: var(--danger);
}

.panel,
.card,
.table-wrap {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.panel {
  padding: 22px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  padding: 18px;
}

.card h3 a {
  color: var(--text);
}

.section {
  margin-top: 34px;
}

.quick-links a,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  color: var(--text);
  font-weight: 700;
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.button:hover,
.quick-links a:hover {
  text-decoration: none;
  border-color: var(--accent);
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

th,
td {
  padding: 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: #f2f5f8;
  font-size: 14px;
  color: #344054;
}

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

.copy-code {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--text);
  padding: 7px 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  cursor: pointer;
}

.notice {
  border-left: 4px solid var(--accent);
  background: #eefbf8;
  padding: 14px 16px;
  border-radius: 0 8px 8px 0;
}

.search-box,
select,
input {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 9px 11px;
  background: #fff;
  color: var(--text);
  font-size: 15px;
}

.filters {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
  gap: 12px;
  margin: 16px 0;
}

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

.result {
  margin-top: 18px;
  padding: 16px;
  background: #f2f8f7;
  border: 1px solid #b9e3db;
  border-radius: 8px;
}

.site-footer {
  margin-top: 36px;
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 22px 20px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 820px) {
  .hero-grid,
  .grid,
  .filters,
  .calc-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .hero-inner,
  .container {
    padding: 24px 16px;
  }
}