:root {
  --bg: #f3f5f8;
  --bg-elev: #ffffff;
  --bg-soft: #eef1f6;
  --text: #1a2230;
  --text-muted: #5c6678;
  --border: #d8dee8;
  --accent: #0f6e56;
  --accent-soft: rgba(15, 110, 86, 0.12);
  --accent-text: #0b5240;
  --shadow: 0 10px 30px rgba(26, 34, 48, 0.06);
  --sidebar-w: 248px;
  --sidebar-w-collapsed: 72px;
  --topbar-h: 56px;
  --radius: 14px;
  --font-display: "Fraunces", "Songti SC", "Noto Serif SC", Georgia, serif;
  --font-body: "Manrope", "PingFang SC", "Noto Sans SC", sans-serif;
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #11161d;
  --bg-elev: #1a222c;
  --bg-soft: #222b37;
  --text: #e8edf5;
  --text-muted: #9aa6b8;
  --border: #2d3745;
  --accent: #3dcfb0;
  --accent-soft: rgba(61, 207, 176, 0.14);
  --accent-text: #9aecd8;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-body);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(15, 110, 86, 0.08), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(36, 72, 120, 0.08), transparent 50%),
    linear-gradient(180deg, var(--bg), var(--bg-soft));
  color: var(--text);
  line-height: 1.5;
}

button,
a {
  font: inherit;
}

button {
  cursor: pointer;
  border: 0;
  background: none;
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

.app {
  min-height: 100vh;
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  transition: grid-template-columns 0.25s ease;
}

.app.sidebar-collapsed {
  grid-template-columns: var(--sidebar-w-collapsed) 1fr;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  background: color-mix(in srgb, var(--bg-elev) 92%, transparent);
  border-right: 1px solid var(--border);
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  z-index: 30;
  overflow: hidden;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 16px 14px;
  min-height: var(--topbar-h);
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  background: linear-gradient(145deg, var(--accent), #1f8f72 55%, #245a8c);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}

.brand-text {
  min-width: 0;
}

.brand-text strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 650;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.brand-text span {
  display: block;
  color: var(--text-muted);
  font-size: 0.75rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-nav {
  flex: 1;
  overflow: auto;
  padding: 8px 10px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--text);
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.nav-item:hover {
  background: var(--bg-soft);
}

.nav-item.active {
  background: var(--accent-soft);
  color: var(--accent-text);
  font-weight: 650;
}

.nav-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  font-size: 0.9rem;
}

.nav-item.active .nav-icon {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  background: color-mix(in srgb, var(--accent-soft) 70%, var(--bg-elev));
}

.nav-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-foot {
  padding: 12px;
  border-top: 1px solid var(--border);
}

.collapse-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text-muted);
}

.collapse-btn:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
}

.app.sidebar-collapsed .brand-text,
.app.sidebar-collapsed .nav-label,
.app.sidebar-collapsed .collapse-btn span {
  display: none;
}

.app.sidebar-collapsed .nav-item {
  justify-content: center;
  padding-inline: 8px;
}

.main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 18px;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
}

.top-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}

.content {
  padding: 22px 22px 96px;
  animation: fade-up 0.35s ease both;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.section-head {
  margin-bottom: 18px;
}

.section-head h1 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.2vw, 1.9rem);
  font-weight: 650;
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.catalog,
.catalog-inner {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.top-nav[hidden] {
  display: none !important;
}

.cat-block-head {
  margin-bottom: 12px;
}

.cat-block-head h2 {
  margin: 0 0 4px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.cat-block-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  font-size: 0.85rem;
  background: var(--accent-soft);
  color: var(--accent-text);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--border));
}

.cat-block-head p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

/* 热门首页：桌面一行 6，手机一行 3（两行） */
.grid-home {
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.grid-home .card {
  flex-direction: column;
  align-items: stretch;
  padding: 12px;
  min-width: 0;
}

.grid-home .card-icon {
  width: 36px;
  height: 36px;
}

.grid-home .card-body h3 {
  font-size: 0.9rem;
}

.grid-home .card-body p {
  font-size: 0.78rem;
  -webkit-line-clamp: 2;
}

.card {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px;
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--bg-elev) 94%, transparent);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
  box-shadow: 0 16px 36px rgba(26, 34, 48, 0.1);
}

.card-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  background: linear-gradient(160deg, var(--bg-soft), var(--bg-elev));
  border: 1px solid var(--border);
  font-weight: 700;
  font-family: var(--font-display);
  color: var(--accent-text);
  overflow: hidden;
}

.card-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-body {
  min-width: 0;
}

.card-body h3 {
  margin: 0 0 4px;
  font-size: 0.98rem;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-body p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.84rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.footer {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.82rem;
}

.social-dock {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.social-btn {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  color: var(--text);
  text-decoration: none;
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.social-btn:hover {
  transform: translateY(-2px) scale(1.03);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  color: var(--accent-text);
}

.overlay {
  display: none;
}

.empty {
  padding: 36px 18px;
  text-align: center;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--bg-elev) 70%, transparent);
}

@media (max-width: 1100px) {
  .grid-home {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .grid-home {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .app,
  .app.sidebar-collapsed {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: min(84vw, 300px);
    transform: translateX(-105%);
    transition: transform 0.25s ease;
    box-shadow: var(--shadow);
  }

  .app.drawer-open .sidebar {
    transform: none;
  }

  .menu-toggle {
    display: grid;
    place-items: center;
  }

  .collapse-btn {
    display: none;
  }

  .overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 20, 0.45);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    z-index: 25;
  }

  .app.drawer-open .overlay {
    opacity: 1;
    pointer-events: auto;
  }

  .content {
    padding: 16px 14px 110px;
  }

  .topbar {
    padding-inline: 12px;
  }

  .app.sidebar-collapsed .brand-text,
  .app.sidebar-collapsed .nav-label {
    display: block;
  }

  .app.sidebar-collapsed .nav-item {
    justify-content: flex-start;
    padding-inline: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}