:root {
  --side: #115e59;
  --side-text: #ecfdf5;
  --side-muted: #99f6e4;
  --accent: #0f766e;
  --bg: #f3efe6;
  --text: #1c1917;
  --muted: #57534e;
  --line: #d6d3d1;
  --card: #fffcf7;
  --font: "Trebuchet MS", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
}

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

a:hover {
  text-decoration: underline;
}

.layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}

.side-nav {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  background: var(--side);
  color: var(--side-text);
  padding: 28px 18px 32px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.side-nav .brand {
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.side-nav .brand:hover {
  text-decoration: none;
  color: var(--side-muted);
}

.side-nav nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.side-nav nav a {
  display: block;
  color: var(--side-muted);
  padding: 10px 12px;
  border-left: 3px solid transparent;
  font-size: 0.95rem;
}

.side-nav nav a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  text-decoration: none;
}

.side-nav nav a.is-active {
  color: #fff;
  border-left-color: #5eead4;
  background: rgba(255, 255, 255, 0.1);
}

.main {
  padding: 28px 36px 48px;
  max-width: 980px;
}

.split-hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: center;
  margin-bottom: 36px;
  padding: 8px 0 12px;
}

.split-hero h1 {
  margin: 0 0 14px;
  font-size: 1.85rem;
  line-height: 1.35;
  color: #134e4a;
}

.split-hero .lead {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 1.02rem;
}

.hero-art {
  background: linear-gradient(160deg, #ccfbf1 0%, #f3efe6 55%, #e7e5e4 100%);
  border: 1px solid #a8a29e;
  padding: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
}

.hero-art svg {
  width: 100%;
  max-width: 280px;
  height: auto;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 16px 0 8px;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff !important;
  padding: 12px 18px;
  border-radius: 0;
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid var(--accent);
  text-decoration: none !important;
}

.btn:hover {
  background: #0d9488;
  border-color: #0d9488;
  text-decoration: none !important;
}

.btn-ghost {
  background: transparent;
  color: var(--accent) !important;
}

.btn-ghost:hover {
  background: #ccfbf1;
  color: #134e4a !important;
}

.band-card {
  background: var(--card);
  border-left: 4px solid var(--accent);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 22px 24px 20px;
  margin: 0 0 28px;
}

.band-card h2 {
  margin: 0 0 14px;
  font-size: 1.28rem;
  color: #134e4a;
  line-height: 1.4;
}

.band-card h3 {
  margin: 18px 0 8px;
  font-size: 1.05rem;
  color: #1e293b;
}

.band-card p {
  margin: 0 0 14px;
  color: var(--text);
}

.band-card p:last-child {
  margin-bottom: 0;
}

.band-card ol {
  margin: 8px 0 12px;
  padding-left: 1.35em;
}

.band-card li {
  margin-bottom: 10px;
}

.time-news {
  list-style: none;
  margin: 8px 0 0;
  padding: 0 0 0 18px;
  border-left: 2px solid #99f6e4;
}

.time-news li {
  position: relative;
  padding: 0 0 22px 18px;
}

.time-news li:last-child {
  padding-bottom: 0;
}

.time-news li::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #ccfbf1;
}

.time-news .date {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 4px;
}

.time-news h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
}

.faq-list details {
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
}

.faq-list details:last-child {
  border-bottom: none;
}

.faq-list summary {
  list-style: none;
  cursor: default;
  font-weight: 700;
  color: #134e4a;
  margin-bottom: 8px;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list details p {
  margin: 0;
  color: var(--muted);
}

.site-footer {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0 0 8px;
}

.icon-inline {
  display: inline-block;
  vertical-align: -3px;
  margin-right: 6px;
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .side-nav {
    position: relative;
    height: auto;
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px 20px;
    padding: 16px 18px;
  }

  .side-nav nav {
    flex-direction: row;
    flex-wrap: wrap;
    width: 100%;
    gap: 4px 8px;
  }

  .side-nav nav a {
    border-left: none;
    border-bottom: 2px solid transparent;
    padding: 8px 10px;
  }

  .side-nav nav a.is-active {
    border-left: none;
    border-bottom-color: #5eead4;
  }

  .main {
    padding: 20px 16px 40px;
  }

  .split-hero {
    grid-template-columns: 1fr;
  }

  .split-hero > div:first-child {
    display: flex;
    flex-direction: column;
  }

  .split-hero > div:first-child h1 {
    order: 1;
  }

  .split-hero > div:first-child .btn-row {
    order: 2;
  }

  .split-hero > div:first-child .lead {
    order: 3;
  }

  .hero-art {
    min-height: 160px;
  }
}