/* ——— Theme tokens ——— */
:root,
[data-theme="dark"] {
  --bg: #070c18;
  --bg-elevated: #0a1220;
  --surface: #0f1628;
  --surface2: #162035;
  --surface3: #1c2a45;
  --border: #1e3a5f;
  --border2: #2a4a7a;
  --accent: #3b82f6;
  --accent2: #8b5cf6;
  --accent3: #06b6d4;
  --green: #10b981;
  --yellow: #f59e0b;
  --orange: #f97316;
  --red: #ef4444;
  --pink: #ec4899;
  --text: #e2e8f0;
  --text-strong: #ffffff;
  --muted: #8899bb;
  --heading-grad-start: #ffffff;
  --heading-grad-end: #93c5fd;
  --hero-bg: linear-gradient(160deg, #07111f 0%, #0d1d40 60%, #070c18 100%);
  --hero-glow: rgba(59, 130, 246, 0.22);
  --nav-bg: rgba(7, 12, 24, 0.96);
  --nav-mobile-bg: rgba(7, 12, 24, 0.98);
  --code-bg: #0a1525;
  --code-text: #9cdcfe;
  --glow: rgba(59, 130, 246, 0.18);
  --shadow: 0 10px 36px rgba(0, 0, 0, 0.35);
  --search-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  --table-hover: rgba(59, 130, 246, 0.04);
  --disclaimer-bg: rgba(245, 158, 11, 0.08);
  --disclaimer-border: rgba(245, 158, 11, 0.35);
  --layer-l5: rgba(59, 130, 246, 0.12);
  --layer-l5-border: rgba(59, 130, 246, 0.3);
  --layer-l5-text: #93c5fd;
  --layer-l4: rgba(139, 92, 246, 0.12);
  --layer-l4-border: rgba(139, 92, 246, 0.3);
  --layer-l4-text: #c4b5fd;
  --layer-l3: rgba(6, 182, 212, 0.12);
  --layer-l3-border: rgba(6, 182, 212, 0.3);
  --layer-l3-text: #67e8f9;
  --layer-l2: rgba(16, 185, 129, 0.12);
  --layer-l2-border: rgba(16, 185, 129, 0.3);
  --layer-l2-text: #6ee7b7;
  --layer-l1: rgba(245, 158, 11, 0.12);
  --layer-l1-border: rgba(245, 158, 11, 0.3);
  --layer-l1-text: #fcd34d;
}

[data-theme="light"] {
  --bg: #f0f4fa;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --surface2: #f1f5f9;
  --surface3: #e8eef6;
  --border: #d8e2ef;
  --border2: #c5d3e3;
  --accent: #2563eb;
  --accent2: #7c3aed;
  --accent3: #0891b2;
  --green: #059669;
  --yellow: #d97706;
  --orange: #ea580c;
  --red: #dc2626;
  --pink: #db2777;
  --text: #1e293b;
  --text-strong: #0f172a;
  --muted: #64748b;
  --heading-grad-start: #0f172a;
  --heading-grad-end: #2563eb;
  --hero-bg: linear-gradient(160deg, #e8f0fe 0%, #f8fafc 55%, #eef2ff 100%);
  --hero-glow: rgba(37, 99, 235, 0.12);
  --nav-bg: rgba(255, 255, 255, 0.94);
  --nav-mobile-bg: rgba(255, 255, 255, 0.98);
  --code-bg: #f1f5f9;
  --code-text: #334155;
  --glow: rgba(37, 99, 235, 0.12);
  --shadow: 0 8px 28px rgba(15, 23, 42, 0.08);
  --search-shadow: 0 16px 48px rgba(15, 23, 42, 0.12);
  --table-hover: rgba(37, 99, 235, 0.06);
  --disclaimer-bg: rgba(245, 158, 11, 0.12);
  --disclaimer-border: rgba(217, 119, 6, 0.35);
  --layer-l5: rgba(37, 99, 235, 0.08);
  --layer-l5-border: rgba(37, 99, 235, 0.22);
  --layer-l5-text: #1d4ed8;
  --layer-l4: rgba(124, 58, 237, 0.08);
  --layer-l4-border: rgba(124, 58, 237, 0.22);
  --layer-l4-text: #6d28d9;
  --layer-l3: rgba(8, 145, 178, 0.08);
  --layer-l3-border: rgba(8, 145, 178, 0.22);
  --layer-l3-text: #0e7490;
  --layer-l2: rgba(5, 150, 105, 0.08);
  --layer-l2-border: rgba(5, 150, 105, 0.22);
  --layer-l2-text: #047857;
  --layer-l1: rgba(217, 119, 6, 0.08);
  --layer-l1-border: rgba(217, 119, 6, 0.22);
  --layer-l1-text: #b45309;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 15px;
  line-height: 1.75;
  min-height: 100vh;
  transition: background 0.25s, color 0.25s;
}

/* ——— NAV ——— */
.topnav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  height: 54px;
  gap: 8px;
}

.topnav .logo {
  font-size: 16px;
  font-weight: 800;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.5px;
  flex-shrink: 0;
  margin-right: 4px;
}

.nav-toggle {
  display: none;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 16px;
}

.nav-groups {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  overflow-x: auto;
  white-space: nowrap;
  min-width: 0;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.nav-groups::-webkit-scrollbar {
  display: none;
}

.nav-group {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding-right: 10px;
  margin-right: 6px;
  border-right: 1px solid var(--border);
  flex-shrink: 0;
}

.nav-group:last-child {
  border-right: none;
  margin-right: 0;
  padding-right: 0;
}

.nav-group-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 0 6px 0 2px;
  flex-shrink: 0;
}

.nav-group.has-active .nav-group-label {
  color: var(--accent);
}

.nav-groups a {
  color: var(--muted);
  text-decoration: none;
  padding: 5px 9px;
  border-radius: 7px;
  font-size: 12px;
  transition: 0.2s;
  flex-shrink: 0;
  border: 1px solid transparent;
}

.nav-groups a:hover {
  color: var(--text-strong);
  background: var(--surface2);
  border-color: var(--border);
}

.nav-groups a.active {
  color: #fff;
  background: var(--accent);
  border-color: rgba(255, 255, 255, 0.25);
  font-weight: 700;
  box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.45), 0 2px 10px var(--glow);
}

[data-theme="light"] .nav-groups a.active {
  color: #fff;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  margin-left: auto;
}

.nav-icon-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  transition: 0.2s;
}

.nav-icon-btn:hover {
  border-color: var(--accent);
  background: var(--surface3);
}

.search-panel {
  display: none;
  position: fixed;
  top: 54px;
  left: 50%;
  transform: translateX(-50%);
  width: min(560px, calc(100% - 32px));
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: 14px;
  padding: 14px;
  z-index: 10000;
  box-shadow: var(--search-shadow);
}

.search-panel.open {
  display: block;
}

.search-panel input {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  color: var(--text);
  font-size: 14px;
  margin-bottom: 10px;
}

.search-panel input:focus {
  outline: none;
  border-color: var(--accent);
}

#search-results {
  max-height: 320px;
  overflow-y: auto;
}

.search-hit {
  display: block;
  padding: 10px 12px;
  border-radius: 8px;
  text-decoration: none;
  margin-bottom: 4px;
  border: 1px solid transparent;
}

.search-hit:hover {
  border-color: var(--border);
  background: var(--surface2);
}

.search-hit strong {
  display: block;
  color: var(--text-strong);
  font-size: 14px;
}

.search-hit span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

.search-empty {
  font-size: 13px;
  color: var(--muted);
  padding: 12px;
}

/* ——— HERO ——— */
.hero {
  margin-top: 54px;
  padding: 56px 24px 44px;
  text-align: center;
  background: var(--hero-bg);
  position: relative;
  overflow: hidden;
}

.hero.hero-home {
  padding-top: 80px;
  min-height: 420px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 60% at 50% -10%, var(--hero-glow), transparent 70%);
  pointer-events: none;
}

.hero h1 {
  font-size: clamp(24px, 4.5vw, 48px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
  background: linear-gradient(135deg, var(--heading-grad-start) 30%, var(--heading-grad-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-home h1 {
  font-size: clamp(28px, 5vw, 56px);
  max-width: 800px;
}

.hero p {
  font-size: 16px;
  color: var(--muted);
  max-width: 680px;
  margin: 0 auto 24px;
  position: relative;
  z-index: 1;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.badge {
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 12px;
  color: var(--accent3);
}

/* ——— LAYOUT ——— */
.page-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.page-cols {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.page-main {
  min-width: 0;
}

.sticky-toc {
  position: sticky;
  top: 70px;
  max-height: calc(100vh - 88px);
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.sticky-toc a.is-active {
  color: var(--accent);
  background: var(--surface2);
  font-weight: 600;
}

.page-lead {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--muted);
}

.page-lead strong {
  color: var(--text);
}

.sticky-toc h5 {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.sticky-toc a {
  display: block;
  font-size: 12.5px;
  color: var(--muted);
  text-decoration: none;
  padding: 6px 8px;
  border-radius: 6px;
  margin-bottom: 2px;
  transition: 0.15s;
}

.sticky-toc a:hover {
  color: var(--text-strong);
  background: var(--surface2);
}

/* ——— SECTION ——— */
.sec-title {
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 700;
  margin-bottom: 6px;
  background: linear-gradient(135deg, var(--heading-grad-start), var(--heading-grad-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sec-sub {
  color: var(--muted);
  font-size: 13.5px;
  margin-bottom: 28px;
}

.sec-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: 36px 0 18px;
}

.sec-head:first-child {
  margin-top: 0;
}

.sec-head-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  color: #fff;
}

.sec-head-icon--intro {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
}

.sec-head-icon--cog {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
}

.sec-head-icon--skill {
  background: linear-gradient(135deg, var(--green), var(--accent3));
}

.sec-head-icon--app {
  background: linear-gradient(135deg, var(--orange), var(--red));
}

.sec-head-icon--adv {
  background: linear-gradient(135deg, var(--accent2), var(--pink));
}

.sec-head-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-strong);
  line-height: 1.3;
}

.sec-head-desc {
  font-size: 13px;
  color: var(--muted);
  margin-top: 2px;
}

hr.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

.data-disclaimer {
  background: var(--disclaimer-bg);
  border: 1px solid var(--disclaimer-border);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 24px;
  font-size: 13px;
  color: var(--text);
  line-height: 1.7;
}

.data-disclaimer strong {
  color: var(--yellow);
}

/* ——— GRIDS & CARDS ——— */
.grid-2,
.grid-3,
.grid-4,
.card-grid,
.paths-grid {
  display: grid;
  gap: 18px;
  align-items: stretch;
}

.grid-2,
.card-grid {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.paths-grid {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.grid-2 > a,
.grid-3 > a,
.card-grid > a {
  display: flex;
  text-decoration: none;
  color: inherit;
  min-height: 100%;
}

.grid-2 > a > .card,
.grid-3 > a > .card,
.card-grid > a > .card {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  cursor: pointer;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  transition: 0.25s;
  height: 100%;
}

.card:hover {
  border-color: var(--border2);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.card-icon {
  font-size: 28px;
  margin-bottom: 10px;
  line-height: 1;
}

.card-no {
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 4px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.card-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 6px;
}

.card-name a {
  color: var(--text-strong);
  text-decoration: none;
}

.card-name a:hover {
  color: var(--accent);
}

.card-co {
  font-size: 12px;
  margin-bottom: 10px;
}

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

.card-co a:hover {
  text-decoration: underline;
}

.card-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 10px;
  flex: 1;
}

.card-desc ul {
  padding-left: 16px;
  margin: 0;
}

.path-card-desc {
  margin-top: 8px;
}

.path-card-desc strong {
  color: var(--text-strong);
}

.path-step {
  color: var(--accent);
}

.hero-lead {
  font-size: 17px;
  max-width: 700px;
}

.hero-badges {
  margin-bottom: 24px;
}

.card-emoji {
  font-size: 28px;
  line-height: 1;
  flex-shrink: 0;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: auto;
  padding-top: 8px;
}

.tag {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 8px;
  font-size: 11px;
  color: var(--accent3);
}

.tag-g {
  color: var(--green);
  border-color: rgba(16, 185, 129, 0.3);
  background: rgba(16, 185, 129, 0.06);
}

.tag-r {
  color: #fca5a5;
  border-color: rgba(239, 68, 68, 0.3);
  background: rgba(239, 68, 68, 0.06);
}

[data-theme="light"] .tag-r {
  color: var(--red);
}

.tag-p {
  color: #c4b5fd;
  border-color: rgba(139, 92, 246, 0.3);
  background: rgba(139, 92, 246, 0.06);
}

[data-theme="light"] .tag-p {
  color: var(--accent2);
}

.tag-y {
  color: #fcd34d;
  border-color: rgba(245, 158, 11, 0.3);
  background: rgba(245, 158, 11, 0.06);
}

[data-theme="light"] .tag-y {
  color: var(--yellow);
}

.card--border-green {
  border-color: rgba(16, 185, 129, 0.4);
}

.card--border-red {
  border-color: rgba(239, 68, 68, 0.4);
}

.card-list {
  font-size: 13px;
  color: var(--muted);
  padding-left: 16px;
  margin: 0;
}

.card-list li {
  margin-bottom: 4px;
}

.card--accent-green {
  border-top: 3px solid var(--green);
}

.card--accent-blue {
  border-top: 3px solid var(--accent);
}

.card--accent-orange {
  border-top: 3px solid var(--orange);
}

.card--accent-indigo {
  border-top: 3px solid #6366f1;
}

.scores {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 10px;
}

.sc {
  background: var(--surface2);
  border-radius: 7px;
  padding: 3px 9px;
  font-size: 11.5px;
  color: var(--muted);
}

.sc b {
  color: var(--green);
}

/* ——— TABLES ——— */
.tbl-wrap {
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
  margin: 16px 0;
  background: var(--surface);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
}

th {
  background: var(--surface2);
  color: var(--accent3);
  font-size: 12px;
  font-weight: 600;
  padding: 11px 14px;
  text-align: left;
  letter-spacing: 0.4px;
  white-space: nowrap;
}

td {
  padding: 11px 14px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  vertical-align: top;
}

tr:hover td {
  background: var(--table-hover);
}

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

td a:hover {
  text-decoration: underline;
}

td strong {
  color: var(--text-strong);
}

/* ——— PILLS ——— */
.pill {
  display: inline-block;
  border-radius: 12px;
  padding: 2px 9px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}

.pill-b {
  background: rgba(59, 130, 246, 0.15);
  color: #93c5fd;
}

[data-theme="light"] .pill-b {
  color: #1d4ed8;
}

.pill-g {
  background: rgba(16, 185, 129, 0.15);
  color: #6ee7b7;
}

[data-theme="light"] .pill-g {
  color: #047857;
}

.pill-p {
  background: rgba(139, 92, 246, 0.15);
  color: #c4b5fd;
}

.pill-y {
  background: rgba(245, 158, 11, 0.15);
  color: #fcd34d;
}

.pill-r {
  background: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
}

.pill-o {
  background: rgba(249, 115, 22, 0.15);
  color: #fdba74;
}

.pill-c {
  background: rgba(6, 182, 212, 0.15);
  color: #67e8f9;
}

/* ——— BOXES ——— */
.dbox {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  margin-bottom: 24px;
}

.dbox h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.dbox h4 {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--accent3);
  margin: 18px 0 8px;
}

.dbox p {
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 10px;
  line-height: 1.7;
}

.dbox ul,
.dbox ol {
  padding-left: 20px;
  margin-bottom: 10px;
}

.dbox li {
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 6px;
  line-height: 1.65;
}

.dbox li strong {
  color: var(--text-strong);
}

.note,
.warn,
.tip,
.danger {
  border-radius: 0 8px 8px 0;
  padding: 12px 16px;
  margin: 12px 0;
  font-size: 13px;
  color: var(--text);
}

.note {
  background: rgba(59, 130, 246, 0.07);
  border-left: 3px solid var(--accent);
}

.warn {
  background: rgba(245, 158, 11, 0.07);
  border-left: 3px solid var(--yellow);
}

.tip {
  background: rgba(16, 185, 129, 0.07);
  border-left: 3px solid var(--green);
}

.danger {
  background: rgba(239, 68, 68, 0.07);
  border-left: 3px solid var(--red);
}

/* ——— LAYER STACK ——— */
.layer-stack {
  display: grid;
  gap: 10px;
}

.layer {
  border-radius: 10px;
  padding: 14px 16px;
}

.layer strong {
  display: block;
  margin-bottom: 4px;
}

.layer p {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}

.layer-l5 {
  background: var(--layer-l5);
  border: 1px solid var(--layer-l5-border);
}

.layer-l5 strong {
  color: var(--layer-l5-text);
}

.layer-l4 {
  background: var(--layer-l4);
  border: 1px solid var(--layer-l4-border);
}

.layer-l4 strong {
  color: var(--layer-l4-text);
}

.layer-l3 {
  background: var(--layer-l3);
  border: 1px solid var(--layer-l3-border);
}

.layer-l3 strong {
  color: var(--layer-l3-text);
}

.layer-l2 {
  background: var(--layer-l2);
  border: 1px solid var(--layer-l2-border);
}

.layer-l2 strong {
  color: var(--layer-l2-text);
}

.layer-l1 {
  background: var(--layer-l1);
  border: 1px solid var(--layer-l1-border);
}

.layer-l1 strong {
  color: var(--layer-l1-text);
}

/* ——— COMPARE ——— */
.cmp-table {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 12px 0;
}

.cmp-row {
  display: grid;
  grid-template-columns: minmax(120px, 28%) 1fr;
  gap: 2px;
}

.cmp-row > div {
  background: var(--surface);
  padding: 10px 12px;
  font-size: 13px;
  color: var(--muted);
  border-radius: 6px;
  text-align: left;
  line-height: 1.55;
}

.cmp-row .cmp-label {
  font-weight: 600;
  color: var(--text-strong);
  background: var(--surface2);
}

.cmp-h {
  display: grid;
  grid-template-columns: minmax(120px, 28%) 1fr;
  gap: 2px;
  margin-bottom: 2px;
}

.cmp-h div {
  background: var(--surface2);
  text-align: left;
  padding: 9px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent3);
  border-radius: 6px;
}

/* ——— TIMELINE ——— */
.tl {
  position: relative;
  padding-left: 30px;
}

.tl::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent2), var(--accent3));
  border-radius: 2px;
}

.tl-item {
  position: relative;
  margin-bottom: 28px;
}

.tl-dot {
  position: absolute;
  left: -24px;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 8px var(--accent);
}

.tl-yr {
  font-size: 11px;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 3px;
  letter-spacing: 1px;
}

.tl-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 14px 18px;
}

.tl-card h4 {
  font-size: 14.5px;
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--text-strong);
}

.tl-card p {
  font-size: 13px;
  color: var(--muted);
}

/* ——— INDUSTRY ——— */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 24px;
}

.ind-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: 0.25s;
  height: 100%;
}

.ind-card:hover {
  border-color: var(--accent3);
  box-shadow: var(--shadow);
}

.ind-header {
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 13px;
  border-bottom: 1px solid var(--border);
}

.ind-icon {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.ind-header h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-strong);
}

.ind-body {
  padding: 18px 20px;
}

.ind-body p {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
}

.prog {
  background: var(--surface2);
  border-radius: 5px;
  height: 5px;
  margin: 6px 0 14px;
}

.prog-fill {
  height: 5px;
  border-radius: 5px;
  background: linear-gradient(90deg, var(--accent), var(--accent3));
}

/* ——— MISC ——— */
.cost-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  margin: 14px 0;
}

.ci {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 15px;
  height: 100%;
}

.ci-name {
  font-weight: 600;
  color: var(--text-strong);
  font-size: 13.5px;
}

.ci-price {
  font-size: 22px;
  font-weight: 700;
  color: var(--green);
}

.ci-note {
  font-size: 12px;
  color: var(--muted);
  margin-top: 5px;
}

.steps {
  counter-reset: step;
}

.step {
  display: flex;
  gap: 14px;
  margin-bottom: 16px;
  align-items: flex-start;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  min-width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-body {
  font-size: 13.5px;
  color: var(--muted);
}

.step-body strong {
  color: var(--text-strong);
}

.code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 12.5px;
  color: var(--code-text);
  line-height: 1.8;
  overflow-x: auto;
  margin: 10px 0;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 14px;
  margin: 20px 0;
}

.stat {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
}

.stat-num {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 800;
  color: var(--accent);
  line-height: 1.1;
}

.stat-label {
  font-size: 12px;
  color: var(--muted);
  margin-top: 6px;
}

.stat-row--market {
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 10px;
  margin: 14px 0 18px;
}

.stat-row--market .stat {
  padding: 10px 8px;
  border-radius: 10px;
}

.stat-row--market .stat-num {
  font-size: clamp(14px, 1.8vw, 18px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.stat-row--market .stat-label {
  font-size: 10.5px;
  line-height: 1.35;
  margin-top: 4px;
  padding: 0 2px;
}

tr.table-tier td {
  background: var(--surface2);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  padding: 10px 12px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.related-links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
  margin: 16px 0 8px;
}

.related-links a.card-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  text-decoration: none;
  color: inherit;
  min-height: 72px;
}

.related-links a.card-link:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.related-links a.card-link .card-name {
  margin: 0;
  font-size: 14px;
}

.quiz-opt {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  margin: 6px 0;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
}

.quiz-opt:hover {
  border-color: var(--accent);
}

.quiz-opt.correct {
  border-color: var(--green);
  color: var(--green);
}

.quiz-opt.wrong {
  border-color: var(--red);
  color: var(--red);
}

footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 28px 20px;
  color: var(--muted);
  font-size: 12.5px;
  margin-top: 48px;
}

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

footer p + p {
  margin-top: 6px;
}

.chapter-nav {
  margin-top: 10px;
}

#back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: 0.3s;
  z-index: 9998;
  box-shadow: var(--glow);
}

#back-to-top.show {
  opacity: 1;
  visibility: visible;
}

/* ——— RESPONSIVE ——— */
@media (max-width: 1100px) {
  .nav-toggle {
    display: block;
  }

  .nav-groups {
    display: none;
    position: absolute;
    top: 54px;
    left: 0;
    right: 0;
    background: var(--nav-mobile-bg);
    border-bottom: 1px solid var(--border);
    padding: 12px 16px 16px;
    flex-direction: column;
    align-items: stretch;
    max-height: 70vh;
    overflow-y: auto;
    white-space: normal;
  }

  .nav-groups.open {
    display: flex;
  }

  .nav-group {
    flex-wrap: wrap;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding-bottom: 10px;
    margin-bottom: 8px;
    padding-right: 0;
    margin-right: 0;
  }
}

@media (max-width: 900px) {
  .page-cols {
    grid-template-columns: 1fr;
  }

  .sticky-toc {
    position: static;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 12px;
  }

  .sticky-toc h5 {
    width: 100%;
    margin-bottom: 6px;
  }

  .sticky-toc a {
    display: inline-block;
    margin: 0;
    font-size: 12px;
    padding: 4px 10px;
    background: var(--surface2);
    border: 1px solid var(--border);
  }
}

@media (max-width: 640px) {
  .page-wrap {
    padding: 32px 16px 60px;
  }

  .hero {
    padding: 44px 16px 32px;
  }

  .cmp-row {
    grid-template-columns: 1fr;
  }

  .cmp-row .cmp-label {
    border-radius: 6px 6px 0 0;
  }
}

/* ——— Copy blocks ——— */
.copy-block {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px 14px;
  margin: 12px 0;
}

.copy-block pre,
.copy-block .copy-block-body {
  margin: 0;
  padding-top: 8px;
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--code-text);
  white-space: pre-wrap;
  word-break: break-word;
}

.copy-block-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border2);
  background: var(--surface2);
  color: var(--muted);
  cursor: pointer;
  transition: 0.15s;
}

.copy-block-btn:hover,
.copy-block-btn.copied {
  color: var(--accent);
  border-color: var(--accent);
}

.copy-prompt-grid {
  display: grid;
  gap: 16px;
}

@media (min-width: 900px) {
  .copy-prompt-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.prompt-compare {
  display: grid;
  gap: 12px;
}

@media (min-width: 768px) {
  .prompt-compare {
    grid-template-columns: 1fr 1fr;
  }
}

.prompt-compare .card--bad {
  border-color: rgba(239, 68, 68, 0.45);
}

.prompt-compare .card--good {
  border-color: rgba(16, 185, 129, 0.45);
}

/* ——— Table source notes ——— */
.table-source-note {
  font-size: 12px;
  color: var(--muted);
  margin-top: 10px;
  line-height: 1.6;
  padding: 10px 12px;
  background: var(--surface2);
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

.table-source-note time {
  font-weight: 600;
  color: var(--text);
}

.td-verified,
.td-released {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}

a.model-link {
  color: var(--accent);
  text-decoration: underline;
  font-weight: 600;
}

a.model-link:hover {
  color: var(--accent2);
}

.page-cols-footer {
  grid-column: 1 / -1;
  margin-top: 8px;
}

.cmp-guide .cmp-row + .cmp-row {
  margin-top: 2px;
}

/* ——— Timeline eras ——— */
.tl-era {
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  background: var(--surface);
  overflow: hidden;
}

.tl-era-summary {
  cursor: pointer;
  padding: 14px 18px;
  font-weight: 700;
  font-size: 14px;
  color: var(--text-strong);
  list-style: none;
  user-select: none;
}

.tl-era-summary::-webkit-details-marker {
  display: none;
}

.tl-era-summary::before {
  content: '▸ ';
  color: var(--accent);
  display: inline-block;
  transition: transform 0.15s;
}

.tl-era[open] .tl-era-summary::before {
  transform: rotate(90deg);
}

.tl-era-body {
  padding: 0 12px 12px;
}

.tl-era-body .tl-item:first-child {
  margin-top: 8px;
}

/* ——— Grouped TOC (startup) ——— */
.sticky-toc .toc-group-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  margin: 14px 0 6px;
  padding: 0 8px;
  letter-spacing: 0.5px;
}

.sticky-toc a.toc-sub {
  padding-left: 16px;
  font-size: 12px;
}

/* ——— 18-module map (index) ——— */
.module-map-wrap {
  margin-bottom: 28px;
}

.module-map {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.module-map th,
.module-map td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.module-map th {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--muted);
  background: var(--surface2);
}

.module-map tr:hover td {
  background: var(--table-hover);
}

.module-map .ch-tag {
  display: inline-block;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--surface3);
  color: var(--muted);
  white-space: nowrap;
}

/* ——— AI 工具入口合集 hub ——— */
.hero-hub {
  padding-bottom: 36px;
}

.page-hub .page-main {
  min-width: 0;
}

.hub-sec-sub {
  margin-bottom: 14px;
}

.hub-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.hub-quick-btn {
  font-size: 12px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  text-decoration: none;
  transition: 0.15s;
}

.hub-quick-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--surface);
}

.hub-link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 10px;
  margin-bottom: 8px;
}

.hub-link-grid--compact {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.hub-link {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s;
}

.hub-link:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px var(--glow);
  transform: translateY(-1px);
}

.hub-link:hover .hub-url,
.hub-link:hover .hub-go {
  color: var(--accent);
}

.hub-rank {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  line-height: 26px;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  border-radius: 6px;
  background: var(--surface3);
  color: var(--accent);
}

.hub-body {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.hub-name {
  font-weight: 600;
  font-size: 14px;
  color: var(--text-strong);
}

.hub-desc {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.45;
}

.hub-tip {
  display: block;
  font-size: 11px;
  color: var(--text);
  line-height: 1.4;
  opacity: 0.88;
  margin-top: 1px;
}

.hub-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin: 6px 0 4px;
}

.hub-chip {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  line-height: 1.3;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--surface3);
  color: var(--muted);
  border: 1px solid var(--border);
}

.hub-chip--access-cn {
  color: #c0392b;
  background: color-mix(in srgb, #e74c3c 12%, var(--surface2));
  border-color: color-mix(in srgb, #e74c3c 28%, transparent);
}

.hub-chip--access-global {
  color: #1a7f4e;
  background: color-mix(in srgb, #27ae60 12%, var(--surface2));
  border-color: color-mix(in srgb, #27ae60 28%, transparent);
}

.hub-chip--access-proxy {
  color: #2471a3;
  background: color-mix(in srgb, #3498db 12%, var(--surface2));
  border-color: color-mix(in srgb, #3498db 28%, transparent);
}

.hub-chip--price-free {
  color: #1a7f4e;
}

.hub-chip--price-metered {
  color: #8e44ad;
}

.hub-chip--form {
  font-weight: 500;
}

[data-theme="dark"] .hub-chip--access-cn {
  color: #ff9a8a;
}

[data-theme="dark"] .hub-chip--access-proxy {
  color: #8ec8ff;
}

.hub-url {
  font-size: 11px;
  color: var(--accent3);
  font-family: ui-monospace, Menlo, monospace;
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent3) 45%, transparent);
  text-underline-offset: 2px;
  word-break: break-all;
}

.hub-go {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  margin-top: 2px;
}

.hub-name-row,
.hub-pill-top {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.hub-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  padding: 4px 8px;
  border-radius: 6px;
  letter-spacing: 0;
}

.hub-tag--cn {
  background: color-mix(in srgb, #e74c3c 18%, var(--surface2));
  border: 1px solid color-mix(in srgb, #e74c3c 35%, transparent);
}

.hub-tag--global {
  background: color-mix(in srgb, #3498db 18%, var(--surface2));
  border: 1px solid color-mix(in srgb, #3498db 35%, transparent);
}

.hub-tag--local {
  background: color-mix(in srgb, var(--accent) 15%, var(--surface2));
  color: var(--accent);
  border: 1px dashed color-mix(in srgb, var(--accent) 45%, transparent);
}

[data-theme="dark"] .hub-tag--cn {
  background: color-mix(in srgb, #ff8a7a 12%, var(--surface2));
}

[data-theme="dark"] .hub-tag--global {
  background: color-mix(in srgb, #7ec8ff 12%, var(--surface2));
}

.hub-link-grid--compact .hub-link {
  flex-direction: column;
  gap: 4px;
  padding: 10px 12px;
}

.hub-link-grid--compact .hub-rank {
  display: none;
}

.hub-footer-cta {
  margin-top: 32px;
  border-color: var(--accent);
}

.hub-footer {
  text-align: center;
  padding: 32px 24px 48px;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
}

.hub-footer a {
  color: var(--accent);
}

.topnav .logo {
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ——— 门户工具导航分区布局 ——— */
.page-hub-layout {
  display: grid;
  grid-template-columns: minmax(200px, 240px) minmax(0, 1fr);
  gap: 24px 28px;
  align-items: start;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px 48px;
}

.page-hub-layout--horizontal {
  grid-template-columns: 1fr;
  max-width: 1180px;
}

.page-hub-layout--horizontal .hub-zone:not(.hub-zone--panel-active) {
  display: none !important;
}

.page-hub-layout--horizontal .hub-zone.hub-zone--panel-active {
  margin-bottom: 24px;
}

.page-hub-layout--horizontal .hub-zone-tabs {
  flex-wrap: nowrap;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  gap: 8px;
  padding-bottom: 12px;
}

.page-hub-layout--horizontal .hub-zone-tabs::-webkit-scrollbar {
  height: 6px;
}

.page-hub-layout .hub-sidebar {
  position: sticky;
  top: 68px;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  padding: 14px 12px;
}

.page-hub-layout .hub-sidebar .toc-group-label {
  margin-top: 10px;
}

.page-hub-layout .hub-sidebar .toc-group-label:first-of-type {
  margin-top: 4px;
}

.page-hub-layout .hub-sidebar .toc-group-label a {
  color: var(--text-strong);
  text-decoration: none;
  font-size: 12px;
}

.page-hub-layout .hub-sidebar .toc-group-label a:hover {
  color: var(--accent);
}

.hub-filter-wrap {
  margin-bottom: 10px;
}

.hub-filter {
  width: 100%;
  box-sizing: border-box;
  padding: 8px 10px;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface2);
  color: var(--text);
}

.hub-filter:focus {
  outline: none;
  border-color: var(--accent);
}

.hub-zone-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  position: sticky;
  top: 56px;
  z-index: 5;
}

.hub-zone-tab {
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  text-decoration: none;
  transition: 0.15s;
  white-space: nowrap;
}

.hub-zone-tab:hover,
.hub-zone-tab.is-active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--surface);
}

.hub-zone {
  margin-bottom: 36px;
  padding: 20px 18px 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  scroll-margin-top: 100px;
}

.hub-zone-head {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.hub-zone-title {
  font-size: clamp(18px, 2.5vw, 22px);
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--text-strong);
}

.hub-zone-icon {
  margin-right: 4px;
}

.hub-zone-desc {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.hub-zone-body {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.hub-cat {
  padding: 14px 0 0;
  border-top: 1px dashed var(--border);
  scroll-margin-top: 110px;
}

.hub-zone-body > .hub-cat:first-child {
  border-top: none;
  padding-top: 0;
}

.hub-cat-title {
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--text-strong);
}

.hub-cat-sub {
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 10px;
  line-height: 1.5;
}

.hub-cat--ranked .hub-link-grid {
  margin-top: 4px;
}

.page-hub-layout--horizontal .hub-cat .hub-link-grid {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.hub-pill-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hub-pill {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 12px;
  min-width: 148px;
  max-width: 240px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: 0.12s;
}

.hub-pill:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 2px 12px var(--glow);
}

.hub-pill:hover .hub-pill-url,
.hub-pill:hover .hub-go {
  color: var(--accent);
}

.hub-pill-url {
  font-size: 11px;
  font-family: ui-monospace, Menlo, monospace;
  color: var(--accent3);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent3) 50%, transparent);
  text-underline-offset: 2px;
  word-break: break-all;
  line-height: 1.35;
}

.hub-pill .hub-go {
  font-size: 10px;
  font-weight: 600;
  color: var(--muted);
}

.hub-pill-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-strong);
  line-height: 1.3;
}

.hub-pill:hover .hub-pill-name {
  color: var(--accent);
}

.hub-pill-desc {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.35;
}

.hub-pill--local {
  border-style: dashed;
  border-color: var(--accent3);
}

.hub-cat--hidden,
.hub-zone--hidden {
  display: none !important;
}

.hub-sidebar a.is-active {
  color: var(--accent);
  background: var(--surface2);
  font-weight: 600;
}

@media (max-width: 960px) {
  .page-hub-layout {
    grid-template-columns: 1fr;
    padding: 0 16px 40px;
  }

  .page-hub-layout .hub-sidebar {
    position: static;
    max-height: none;
    display: flex;
    flex-wrap: wrap;
    gap: 4px 6px;
    align-items: center;
  }

  .page-hub-layout .hub-sidebar h5,
  .page-hub-layout .hub-filter-wrap {
    width: 100%;
  }

  .page-hub-layout .hub-sidebar .toc-group-label {
    width: auto;
    margin: 0;
    padding: 0;
  }

  .page-hub-layout .hub-sidebar .toc-group-label a {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--surface2);
    font-size: 11px;
  }

  .page-hub-layout .hub-sidebar .toc-sub {
    display: none;
  }

  .hub-zone-tabs {
    top: 52px;
  }
}

@media (max-width: 640px) {
  .hub-link-grid,
  .hub-link-grid--compact {
    grid-template-columns: 1fr;
  }

  .hub-pill {
    max-width: none;
    flex: 1 1 calc(50% - 8px);
  }
}

/* ——— 门户首页（index = 工具导航） ——— */
.portal-home-top {
  padding-top: 54px;
}

.hero-portal-home {
  margin-top: 0;
  padding-top: 36px;
  padding-bottom: 32px;
}

.portal-home-title {
  font-size: clamp(22px, 3.8vw, 36px);
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.portal-home-jumps {
  justify-content: center;
}

.badge--training-link {
  border: 1px dashed var(--accent);
  background: rgba(99, 102, 241, 0.08);
}

.topnav.topnav--portal {
  justify-content: flex-start;
}

.topnav.topnav--portal .logo--portal {
  font-size: 15px;
}

.nav-portal-spacer {
  flex: 1;
  min-width: 8px;
}

.nav-portal-cta {
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 700;
  padding: 8px 14px;
  border-radius: 10px;
  text-decoration: none;
  color: #fff;
  background: var(--accent);
  border: 1px solid var(--border);
  transition: opacity 0.15s, transform 0.12s;
}

.nav-portal-cta:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}

.nav-actions--portal {
  margin-left: 8px;
}

@media (max-width: 520px) {
  .nav-portal-cta {
    font-size: 12px;
    padding: 7px 10px;
  }
}

/* ——— MOBILE OPTIMIZATION (全站) ——— */
html {
  -webkit-text-size-adjust: 100%;
  overflow-x: clip;
}

body {
  overflow-x: clip;
}

body.nav-open {
  overflow: hidden;
}

.page-wrap--home {
  padding-top: 32px;
}

.tbl-wrap {
  position: relative;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.tbl-wrap::after {
  content: '← 左右滑动查看更多 →';
  display: block;
  text-align: center;
  font-size: 11px;
  color: var(--muted);
  padding: 8px 4px 2px;
  letter-spacing: 0.02em;
}

@media (min-width: 769px) {
  .tbl-wrap::after {
    display: none;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 16px;
  }

  .topnav {
    padding: env(safe-area-inset-top, 0) 12px 0;
    padding-left: max(12px, env(safe-area-inset-left, 0));
    padding-right: max(12px, env(safe-area-inset-right, 0));
  }

  .topnav .logo {
    font-size: 14px;
    max-width: 42vw;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .nav-toggle {
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .nav-icon-btn {
    min-width: 44px;
    min-height: 44px;
    padding: 8px 10px;
  }

  .nav-groups {
    max-height: calc(100vh - 54px);
    max-height: calc(100dvh - 54px);
  }

  .nav-groups a {
    display: block;
    padding: 10px 12px;
    font-size: 14px;
  }

  .search-panel {
    width: calc(100% - 20px);
    max-height: calc(100vh - 74px);
    max-height: calc(100dvh - 74px);
    overflow-y: auto;
  }

  .hero {
    padding: 36px 16px 28px;
  }

  .hero.hero-home {
    min-height: auto;
    padding-top: 48px;
    padding-bottom: 28px;
  }

  .hero p,
  .hero-lead {
    font-size: 15px;
    line-height: 1.65;
  }

  .badges {
    gap: 6px;
  }

  .badge {
    font-size: 11px;
    padding: 6px 12px;
  }

  .page-wrap {
    padding: 28px 16px calc(56px + env(safe-area-inset-bottom, 0));
  }

  .page-wrap--home {
    padding-top: 24px;
  }

  .sec-sub {
    font-size: 14px;
    margin-bottom: 20px;
  }

  .sec-head {
    flex-direction: column;
    gap: 8px;
    margin: 28px 0 14px;
  }

  .grid-2,
  .card-grid,
  .paths-grid {
    grid-template-columns: 1fr;
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 160px), 1fr));
  }

  .industry-grid {
    gap: 16px;
    grid-template-columns: 1fr;
  }

  .ind-header {
    padding: 14px 16px;
  }

  .ind-body {
    padding: 14px 16px;
  }

  .stat-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .stat {
    padding: 12px 10px;
  }

  .stat-num {
    font-size: 22px;
  }

  .stat-label {
    font-size: 11px;
  }

  .dbox {
    padding: 14px 16px;
  }

  .dbox h3 {
    font-size: 16px;
  }

  .card {
    padding: 14px 16px;
  }

  .card-name {
    font-size: 14px;
  }

  table {
    min-width: 520px;
  }

  table.module-map {
    min-width: 0;
  }

  .module-map th,
  .module-map td {
    padding: 8px 10px;
    font-size: 12px;
    white-space: normal;
  }

  th,
  td {
    padding: 10px 12px;
    font-size: 12px;
  }

  th {
    white-space: normal;
  }

  .cmp-h {
    display: none;
  }

  .cmp-row {
    grid-template-columns: 1fr;
    gap: 0;
    margin-bottom: 10px;
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
  }

  .cmp-row > div {
    border-radius: 0;
    padding: 10px 14px;
  }

  .cmp-row .cmp-label {
    background: var(--surface2);
    border-bottom: 1px solid var(--border);
    font-size: 12px;
  }

  .code,
  .copy-block pre,
  .copy-block .copy-block-body {
    font-size: 12px;
    line-height: 1.55;
  }

  .tl {
    padding-left: 22px;
  }

  .tl-dot {
    left: -18px;
  }

  .tl-card {
    padding: 12px 14px;
  }

  .layer-stack {
    gap: 8px;
  }

  .layer {
    padding: 12px 14px;
  }

  .cost-grid {
    grid-template-columns: 1fr;
  }

  .page-lead {
    padding: 14px 16px;
    font-size: 13px;
  }

  .data-disclaimer {
    padding: 12px 14px;
    font-size: 12px;
  }

  hr.divider {
    margin: 32px 0;
  }

  footer {
    padding: 24px 16px;
    font-size: 12px;
  }

  .chapter-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
    line-height: 1.6;
  }

  .chapter-nav a {
    display: inline-block;
    padding: 4px 0;
  }

  #back-to-top {
    bottom: calc(20px + env(safe-area-inset-bottom, 0));
    right: calc(16px + env(safe-area-inset-right, 0));
    width: 48px;
    height: 48px;
  }

  .page-hub-layout {
    padding: 0 12px 32px;
  }

  .page-hub-layout--horizontal .hub-zone-tabs {
    top: 54px;
    margin: 0 -4px;
    padding-bottom: 10px;
    gap: 6px;
  }

  .hub-zone-tab {
    font-size: 12px;
    padding: 10px 14px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
  }

  .hub-link {
    padding: 14px 16px;
    min-height: 48px;
  }

  .hub-quick {
    gap: 6px;
    margin-bottom: 16px;
  }

  .hub-quick-btn {
    font-size: 11px;
    padding: 6px 10px;
  }

  .hub-pill {
    flex: 1 1 100%;
    min-width: 0;
  }

  .hub-link-grid,
  .hub-link-grid--compact {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .hub-zone-title {
    font-size: 18px;
  }

  .hero-portal-home {
    padding-top: 28px;
    padding-bottom: 24px;
  }

  .portal-home-title {
    font-size: clamp(20px, 6vw, 28px);
    padding: 0 8px;
  }

  .topnav.topnav--portal .logo--portal {
    font-size: 13px;
    max-width: 55vw;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

@media (max-width: 480px) {
  .stat-row {
    grid-template-columns: 1fr 1fr;
  }

  .stat-row--market .stat-num {
    font-size: 18px;
  }

  .scores {
    gap: 5px;
  }

  .sc {
    font-size: 10.5px;
    padding: 2px 7px;
  }

  .sticky-toc a {
    font-size: 11px;
    padding: 6px 10px;
  }

  .nav-portal-cta {
    font-size: 11px;
    padding: 8px 10px;
  }

  .hero-home h1 {
    font-size: clamp(22px, 7vw, 32px);
  }
}

@media (max-width: 380px) {
  .topnav .logo {
    max-width: 36vw;
  }

  .stat-row {
    grid-template-columns: 1fr;
  }
}