:root {
  color-scheme: dark;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI Variable", "Segoe UI", system-ui, "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Source Han Sans CN", "Noto Sans CJK SC", Roboto, "Helvetica Neue", Arial, sans-serif;

  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  --space-0: 4px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;

  --container-pad: clamp(16px, 4vw, 32px);
  --section-gap: clamp(20px, 3.2vw, 32px);

  --fs-display: clamp(1.5rem, 1.05rem + 1.6vw, 2.2rem);
  --fs-title: clamp(1.1rem, 0.95rem + 0.6vw, 1.32rem);
  --fs-subtitle: clamp(0.95rem, 0.88rem + 0.3vw, 1.06rem);
  --fs-body: clamp(0.92rem, 0.88rem + 0.2vw, 1rem);
  --fs-meta: clamp(0.78rem, 0.74rem + 0.18vw, 0.86rem);

  --spring: cubic-bezier(0.22, 1, 0.36, 1);
  --spring-soft: cubic-bezier(0.32, 0.72, 0.24, 1);
  --dur-fast: 160ms;
  --dur-base: 240ms;
  --dur-slow: 420ms;

  --bg: oklch(0.16 0.02 260);
  --bg-elevated: oklch(0.22 0.025 260 / 0.72);
  --bg-overlay: oklch(0.16 0.02 260 / 0.72);
  --text: oklch(0.96 0.01 260);
  --text-muted: oklch(0.72 0.02 260);
  --border: oklch(0.92 0.02 260 / 0.08);
  --border-strong: oklch(0.92 0.02 260 / 0.16);
  --accent: oklch(0.72 0.16 250);
  --accent-soft: oklch(0.72 0.16 250 / 0.14);
  --success: oklch(0.78 0.12 150);
  --warning: oklch(0.82 0.12 85);

  --shadow-1: 0 2px 8px oklch(0.05 0.02 260 / 0.32), 0 12px 32px oklch(0.05 0.02 260 / 0.28);
  --shadow-2: 0 8px 24px oklch(0.05 0.02 260 / 0.32), 0 32px 64px oklch(0.05 0.02 260 / 0.42);
  --shadow-fab: 0 12px 32px oklch(0.05 0.02 260 / 0.55), 0 4px 10px oklch(0.05 0.02 260 / 0.35);

  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);

  --blur-strong: 18px;
  --blur-soft: 12px;
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: oklch(0.98 0.01 260);
  --bg-elevated: oklch(1 0 260 / 0.78);
  --bg-overlay: oklch(1 0 260 / 0.72);
  --text: oklch(0.2 0.02 260);
  --text-muted: oklch(0.48 0.02 260);
  --border: oklch(0.2 0.02 260 / 0.08);
  --border-strong: oklch(0.2 0.02 260 / 0.16);
  --accent: oklch(0.52 0.18 250);
  --accent-soft: oklch(0.52 0.18 250 / 0.12);
  --shadow-1: 0 2px 8px oklch(0.2 0.02 260 / 0.06), 0 12px 32px oklch(0.2 0.02 260 / 0.08);
  --shadow-2: 0 8px 24px oklch(0.2 0.02 260 / 0.08), 0 32px 64px oklch(0.2 0.02 260 / 0.12);
  --shadow-fab: 0 12px 32px oklch(0.2 0.02 260 / 0.18), 0 4px 10px oklch(0.2 0.02 260 / 0.12);
}

* {
  box-sizing: border-box;
}

*:focus-visible {
  outline: 2px solid oklch(from var(--accent) l c h / 0.7);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

html, body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  position: relative;
  overflow-x: hidden;
  min-height: 100dvh;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  padding-left: var(--safe-left);
  padding-right: var(--safe-right);
}

a {
  color: inherit;
}

input,
button,
select,
textarea {
  font-family: inherit;
}

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

.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 12% 18%, oklch(0.55 0.18 250 / 0.18), transparent 36%),
    radial-gradient(circle at 88% 12%, oklch(0.62 0.14 190 / 0.12), transparent 30%),
    radial-gradient(circle at 50% 100%, oklch(0.48 0.12 300 / 0.1), transparent 42%);
  z-index: 0;
  will-change: transform;
}

.container {
  position: relative;
  z-index: 1;
  width: min(1280px, 100%);
  margin: 0 auto var(--space-5);
  padding-inline: var(--container-pad);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: var(--space-2);
  padding: calc(var(--safe-top) + var(--space-2)) var(--container-pad) var(--space-2);
  background: var(--bg-overlay);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  border-bottom: 1px solid var(--border);
}

.topbar-start {
  justify-self: start;
  min-width: 0;
}

.topbar-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.topbar .site-branding {
  justify-self: center;
  text-align: center;
  max-width: min(520px, 42vw);
  margin: 0;
  color: var(--text-muted);
  font-size: var(--fs-meta);
  line-height: 1.45;
  letter-spacing: 0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}

.brand > div {
  min-width: 0;
}

.brand-mark {
  flex: none;
  width: 14px;
  height: 14px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--accent), oklch(0.68 0.16 190));
  box-shadow: 0 0 24px oklch(from var(--accent) l c h / 0.55);
}

.brand h1,
.hero h2 {
  margin: 0;
  font-size: var(--fs-title);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 650;
}

.brand p,
.hero-meta,
.panel-sub {
  margin: 4px 0 0;
  color: var(--text-muted);
  font-size: var(--fs-meta);
}

.brand p {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-footer {
  position: relative;
  z-index: 1;
  padding: var(--space-4) var(--container-pad) calc(var(--safe-bottom) + var(--space-5));
  text-align: center;
  border-top: 1px solid var(--border);
  background: oklch(from var(--bg) l c h / 0.55);
  backdrop-filter: blur(var(--blur-soft));
  -webkit-backdrop-filter: blur(var(--blur-soft));
}

.site-footer .site-branding {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--fs-meta);
  line-height: 1.55;
  white-space: normal;
}

.icon-btn,
.ghost-btn,
.back-link,
.chip,
.campus-tab {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  border-radius: var(--radius-pill);
  transition:
    transform var(--dur-base) var(--spring),
    background var(--dur-base) var(--spring),
    border-color var(--dur-base) var(--spring),
    box-shadow var(--dur-base) var(--spring);
  -webkit-tap-highlight-color: transparent;
}

.icon-btn,
.ghost-btn,
.back-link {
  cursor: pointer;
  padding: 10px 16px;
  font: inherit;
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.icon-btn {
  width: 44px;
  height: 44px;
  padding: 0;
  position: relative;
}

.icon-btn::before {
  content: "";
  position: absolute;
  inset: 11px;
  border-radius: var(--radius-pill);
  background: linear-gradient(var(--text), var(--text-muted));
  mask: radial-gradient(circle at 30% 30%, #000 42%, transparent 44%);
  -webkit-mask: radial-gradient(circle at 30% 30%, #000 42%, transparent 44%);
}

.icon-btn:active,
.ghost-btn:active,
.back-link:active,
.school-card:active,
.fab:active {
  transform: scale(0.96);
}

@media (hover: hover) {
  .ghost-btn:hover,
  .back-link:hover,
  .school-card:hover {
    border-color: oklch(from var(--accent) l c h / 0.35);
  }

  .icon-btn:hover,
  .fab:hover {
    border-color: oklch(from var(--accent) l c h / 0.4);
  }
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.stat-card,
.school-card,
.panel,
.hero,
.toolbar {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  box-shadow: var(--shadow-1);
}

.stat-card {
  border-radius: var(--radius-md);
  padding: clamp(16px, 3vw, 24px);
  animation: rise var(--dur-slow) var(--spring) both;
}

.stat-label {
  color: var(--text-muted);
  font-size: var(--fs-meta);
}

.stat-value {
  margin-top: var(--space-1);
  font-size: clamp(1.45rem, 1.1rem + 1.4vw, 1.85rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.toolbar {
  position: sticky;
  top: calc(var(--safe-top) + 64px);
  z-index: 10;
  margin-top: var(--space-3);
  border-radius: var(--radius-lg);
  padding: var(--space-1) var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.toolbar input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 16px;
  padding: 12px 8px;
  -webkit-appearance: none;
  appearance: none;
}

.toolbar input::placeholder {
  color: var(--text-muted);
}

.campus-preview {
  margin-top: var(--space-2);
  display: grid;
  gap: var(--space-1);
}

.campus-preview-item {
  padding-top: 10px;
  border-top: 1px solid var(--border);
  display: grid;
  gap: 4px;
}

.campus-preview-item strong {
  font-size: var(--fs-body);
  font-weight: 650;
}

.campus-preview-item span,
.campus-preview-item em {
  color: var(--text-muted);
  font-size: var(--fs-meta);
  font-style: normal;
  line-height: 1.45;
}

.campus-head h4 {
  margin: 0;
  font-size: var(--fs-subtitle);
  font-weight: 650;
}

.campus-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: var(--space-2) 0;
}

.panel-wide {
  grid-column: 1 / -1;
}

.overview-list {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.overview-item {
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--border);
}

.overview-item h4 {
  margin: 0 0 6px;
  font-size: var(--fs-body);
}

.overview-item p {
  margin: 0;
  color: var(--text-muted);
  font-size: var(--fs-meta);
  line-height: 1.5;
}

.overview-meta {
  display: flex;
  gap: 12px;
  margin-top: 8px;
  color: var(--accent);
  font-size: var(--fs-meta);
  font-weight: 550;
}

.school-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.school-card {
  display: block;
  text-decoration: none;
  color: inherit;
  border-radius: var(--radius-lg);
  padding: clamp(16px, 3vw, 24px);
  animation: rise calc(var(--dur-slow) + 60ms) var(--spring) both;
}

.school-card h3 {
  margin: 0;
  font-size: var(--fs-subtitle);
  line-height: 1.2;
  font-weight: 650;
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: var(--space-2);
}

.chip {
  padding: 6px 10px;
  font-size: var(--fs-meta);
  color: var(--text-muted);
  white-space: nowrap;
}

.chip.accent {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: transparent;
}

.card-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-1);
  margin-top: var(--space-2);
}

.metric {
  padding-top: var(--space-1);
  border-top: 1px solid var(--border);
}

.metric span {
  display: block;
  color: var(--text-muted);
  font-size: var(--fs-meta);
}

.metric strong {
  font-size: var(--fs-body);
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}

.hero {
  margin-top: var(--space-3);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 4vw, 32px);
  box-shadow: var(--shadow-2);
}

.hero-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
}

.hero h2 {
  font-size: var(--fs-display);
}

.hero-intro {
  margin: var(--space-3) 0 0;
  max-width: 78ch;
  color: var(--text-muted);
  font-size: var(--fs-body);
  line-height: 1.6;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-2);
}

.hero-links a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid oklch(from var(--accent) l c h / 0.35);
}

.detail-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.panel {
  border-radius: var(--radius-lg);
  padding: clamp(16px, 3vw, 24px);
  animation: rise calc(var(--dur-slow) + 100ms) var(--spring) both;
}

.panel h3 {
  margin: 0;
  font-size: var(--fs-body);
  font-weight: 650;
}

.campus-tabs {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  margin: var(--space-2) calc(var(--container-pad) * -1) var(--space-2);
  padding: 0 var(--container-pad);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
}

.campus-tabs::-webkit-scrollbar {
  display: none;
}

.campus-tab {
  padding: 8px 14px;
  cursor: pointer;
  font: inherit;
  font-size: var(--fs-meta);
  flex: none;
  scroll-snap-align: start;
  min-height: 36px;
}

.campus-tab.active {
  background: var(--accent-soft);
  border-color: oklch(from var(--accent) l c h / 0.35);
  color: var(--accent);
}

.campus-block {
  display: none;
}

.campus-block.active {
  display: block;
}

.campus-address {
  color: var(--text-muted);
  margin: 0 0 var(--space-2);
  font-size: var(--fs-meta);
}

.campus-detail p {
  margin: 0 0 10px;
  color: var(--text-muted);
  font-size: var(--fs-body);
}

.major-table-wrap {
  margin-top: var(--space-2);
  border-radius: var(--radius-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.major-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-meta);
}

.major-table th,
.major-table td {
  padding: 12px 8px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.major-table th {
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
}

.source-list {
  list-style: none;
  padding: 0;
  margin: var(--space-2) 0 0;
}

.source-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.source-list a {
  color: var(--text);
  text-decoration: none;
  font-weight: 550;
}

.source-list p {
  margin: 6px 0 0;
  color: var(--text-muted);
  font-size: var(--fs-meta);
}

.skeleton,
.skeleton-block {
  position: relative;
  overflow: hidden;
}

.skeleton {
  min-height: 96px;
  border-radius: var(--radius-md);
}

.skeleton-block {
  min-height: 180px;
  border-radius: var(--radius-lg);
}

.skeleton::after,
.skeleton-block::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(
    90deg,
    transparent,
    oklch(from var(--text) l c h / 0.06),
    transparent
  );
  animation: shimmer 1.4s infinite;
  will-change: transform;
}

@keyframes shimmer {
  100% { transform: translateX(100%); }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fab-pop {
  from { opacity: 0; transform: translateY(8px) scale(0.92); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.fab-stack {
  position: fixed;
  right: calc(var(--space-3) + var(--safe-right));
  bottom: calc(var(--space-3) + var(--safe-bottom));
  z-index: 30;
  display: none;
  flex-direction: column;
  gap: var(--space-1);
  pointer-events: none;
}

.fab {
  pointer-events: auto;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  background: var(--bg-overlay);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-fab);
  transition:
    transform var(--dur-base) var(--spring),
    opacity var(--dur-base) var(--spring),
    background var(--dur-base) var(--spring);
  animation: fab-pop var(--dur-base) var(--spring) both;
  -webkit-tap-highlight-color: transparent;
  padding: 0;
}

.fab svg {
  width: 22px;
  height: 22px;
}

.fab[hidden] {
  display: none;
}

.fab.is-hidden {
  opacity: 0;
  transform: translateY(12px) scale(0.92);
  pointer-events: none;
}

@media (max-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .topbar .site-branding {
    display: none;
  }

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

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .container {
    margin-bottom: calc(var(--space-4) + var(--safe-bottom) + 80px);
  }

  .topbar {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas: "brand actions";
  }

  .topbar-start { grid-area: brand; }
  .topbar-actions { display: none; }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-1);
  }

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

  .toolbar {
    top: calc(var(--safe-top) + 60px);
    border-radius: var(--radius-md);
  }

  .hero-top {
    flex-direction: column;
    align-items: flex-start;
  }

  .panel,
  .hero,
  .school-card,
  .stat-card {
    border-radius: var(--radius-md);
  }

  .major-table thead {
    border: 0;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    white-space: nowrap;
  }

  .major-table-wrap {
    overflow: visible;
  }

  .major-table,
  .major-table tbody,
  .major-table tr,
  .major-table td {
    display: block;
    width: 100%;
  }

  .major-table tr {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    margin-bottom: var(--space-1);
    background: oklch(from var(--bg) l c h / 0.35);
  }

  .major-table td {
    padding: 6px 0;
    border-bottom: 1px dashed var(--border);
    display: grid;
    grid-template-columns: minmax(72px, 32%) 1fr;
    gap: var(--space-1);
    text-align: left;
  }

  .major-table td:last-child {
    border-bottom: 0;
  }

  .major-table td::before {
    content: attr(data-label);
    color: var(--text-muted);
    font-size: var(--fs-meta);
  }

  .fab-stack {
    display: flex;
  }
}

@media (max-width: 420px) {
  :root {
    --container-pad: 14px;
  }

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

  .topbar {
    padding-block: calc(var(--safe-top) + 10px) 10px;
  }

  .brand h1 {
    font-size: 1.05rem;
  }

  .brand p {
    font-size: 0.78rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .skeleton::after,
  .skeleton-block::after {
    animation: none;
  }
}

@media (prefers-color-scheme: light) {
  html:not([data-theme]) {
    color-scheme: light;
  }
}

@media print {
  .topbar,
  .site-footer,
  .fab-stack,
  .toolbar {
    display: none !important;
  }
}