:root {
  color-scheme: light dark;
  --page: #f1f2f0;
  --surface: #f9faf8;
  --surface-strong: #ffffff;
  --ink: #181a18;
  --muted: #656a64;
  --quiet: #858b84;
  --line: #d6dad4;
  --line-strong: #b9c0b8;
  --accent: #c45132;
  --accent-soft: #f2ddd6;
  --focus: #8d321d;
  --shadow: 0 18px 42px rgba(60, 66, 59, 0.1);
  --radius-card: 14px;
  --radius-control: 10px;
  --shell: min(1480px, calc(100% - 64px));
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #141715;
    --surface: #1b1f1c;
    --surface-strong: #222723;
    --ink: #edf0ec;
    --muted: #aab1aa;
    --quiet: #858d86;
    --line: #343b35;
    --line-strong: #4b554d;
    --accent: #e27657;
    --accent-soft: #4a2b22;
    --focus: #ffa486;
    --shadow: 0 18px 42px rgba(0, 0, 0, 0.24);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--page);
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100dvh;
  background: var(--page);
  color: var(--ink);
  font-family: "Avenir Next", Avenir, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.5;
}

button,
input,
select {
  font: inherit;
}

button,
a,
input,
select {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

button {
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 10;
  transform: translateY(-160%);
  padding: 10px 14px;
  border-radius: var(--radius-control);
  background: var(--ink);
  color: var(--page);
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  border-bottom: 1px solid var(--line);
}

.top-nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
  white-space: nowrap;
}

.nav-actions {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 16px;
}

.nav-link {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.nav-link:hover {
  color: var(--accent);
}

.private-entry {
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  white-space: nowrap;
}

.private-entry:hover {
  border-color: var(--line-strong);
  background: var(--surface);
}

.intro {
  max-width: 900px;
  padding: clamp(54px, 8vw, 112px) 0 clamp(46px, 7vw, 88px);
}

.intro-label {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

h1,
h2,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-family: "Songti SC", STSong, "Noto Serif CJK SC", serif;
  font-size: clamp(48px, 7vw, 88px);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 1.02;
}

.intro-copy {
  max-width: 660px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 1.7vw, 22px);
  line-height: 1.65;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0;
  border-top: 1px solid var(--line);
}

.stat {
  min-width: 0;
  padding: 22px 24px 26px 0;
}

.stat + .stat {
  padding-left: 24px;
  border-left: 1px solid var(--line);
}

.stat dt {
  color: var(--muted);
  font-size: 13px;
}

.stat dd {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 8px 0 0;
}

.stat dd span {
  font-family: "Avenir Next", Avenir, system-ui, sans-serif;
  font-size: clamp(30px, 3vw, 46px);
  font-weight: 650;
  letter-spacing: -0.05em;
  line-height: 1;
}

.stat dd small {
  color: var(--quiet);
  font-size: 12px;
}

.filter-panel {
  position: sticky;
  top: 0;
  z-index: 2;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--page) 94%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.filter-panel .shell {
  padding-block: 20px 18px;
}

.search-row {
  display: grid;
  grid-template-columns: minmax(240px, 1.6fr) repeat(3, minmax(140px, 0.7fr)) auto;
  align-items: end;
  gap: 12px;
}

.field {
  min-width: 0;
}

.field label,
.category-wrap > p {
  display: block;
  margin: 0 0 7px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.field input,
.field select {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-control);
  background: var(--surface);
  color: var(--ink);
}

.field input {
  padding: 0 14px;
}

.field select {
  padding: 0 36px 0 12px;
}

.field input::placeholder {
  color: var(--quiet);
}

.field input:hover,
.field select:hover {
  border-color: var(--accent);
}

.clear-button,
.empty-state button {
  min-height: 46px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-control);
  background: var(--ink);
  color: var(--page);
  cursor: pointer;
  font-weight: 700;
  white-space: nowrap;
}

.clear-button {
  padding: 0 18px;
}

.clear-button:hover,
.empty-state button:hover {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff8f4;
}

.clear-button:active,
.empty-state button:active,
.category-filter:active {
  transform: translateY(1px);
}

.category-wrap {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  margin-top: 15px;
}

.category-wrap > p {
  margin: 0;
}

.category-filters {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 2px 5px;
  scrollbar-width: thin;
}

.category-filter {
  min-height: 38px;
  flex: 0 0 auto;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
  white-space: nowrap;
}

.category-filter:hover {
  border-color: var(--accent);
  color: var(--ink);
}

.category-filter[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--ink);
}

.catalog {
  padding-block: clamp(52px, 7vw, 96px) 110px;
}

.catalog-heading {
  margin-bottom: 28px;
}

.catalog-heading h2,
.empty-state h2,
.site-footer h2,
.noscript-list h2 {
  margin: 0;
  font-family: "Songti SC", STSong, "Noto Serif CJK SC", serif;
  font-size: clamp(30px, 3.6vw, 52px);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.1;
}

.catalog-heading p {
  margin: 10px 0 0;
  color: var(--muted);
}

.site-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-auto-rows: 8px;
  align-items: start;
  gap: 26px;
}

.site-card {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--surface);
  overflow: hidden;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.site-card:hover,
.site-card:focus-within {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow);
}

.site-card[data-status="archived"] {
  opacity: 0.82;
}

.site-card__link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.site-card__media {
  position: relative;
  margin: 0;
  border-bottom: 1px solid var(--line);
  background: var(--surface-strong);
}

.site-card__image-wrap {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--surface-strong);
}

.site-card[data-cover-ratio="wide"] .site-card__image-wrap {
  aspect-ratio: 16 / 9;
}

.site-card__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 180ms ease;
}

.site-card:hover .site-card__media img {
  transform: scale(1.015);
}

.site-card__fallback {
  position: absolute;
  inset: 0;
  display: none;
  align-items: flex-end;
  padding: 22px;
  background: var(--accent-soft);
  color: var(--ink);
  font-family: "Songti SC", STSong, serif;
  font-size: 24px;
}

.site-card.has-cover-error .site-card__media img {
  display: none;
}

.site-card.has-cover-error .site-card__fallback {
  display: flex;
}

.site-card__media figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 42px;
  padding: 10px 16px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.site-card__access {
  color: var(--accent);
}

.site-card__body {
  padding: 22px 20px 20px;
}

.site-card__category {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
}

.site-card h3 {
  margin: 0;
  font-family: "Songti SC", STSong, "Noto Serif CJK SC", serif;
  font-size: clamp(25px, 2.4vw, 36px);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.14;
}

.site-card__description {
  margin: 13px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.site-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 12px;
  margin: 18px 0 0;
  padding: 15px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.site-card__tags li {
  color: var(--quiet);
  font-size: 11px;
}

.site-card__tags li::before {
  content: "#";
  margin-right: 2px;
  color: var(--accent);
}

.site-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 19px;
  color: var(--muted);
  font-size: 12px;
}

.site-card__open {
  color: var(--ink);
  font-weight: 700;
  white-space: nowrap;
  transition: color 180ms ease, transform 180ms ease;
}

.site-card:hover .site-card__open {
  transform: translateX(2px);
  color: var(--accent);
}

.empty-state,
.noscript-list {
  padding: clamp(48px, 8vw, 96px);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--surface);
}

.empty-state[hidden] {
  display: none;
}

.empty-state p,
.noscript-list p,
.site-footer p {
  max-width: 680px;
  color: var(--muted);
  line-height: 1.7;
}

.empty-state button {
  margin-top: 12px;
  padding: 0 18px;
}

.noscript-list ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 28px;
  margin: 28px 0 0;
  padding-left: 20px;
}

.site-footer {
  border-top: 1px solid var(--line);
}

.footer-content {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 36px;
  padding-block: 64px 72px;
}

.site-footer h2 {
  max-width: 680px;
  font-size: clamp(30px, 3.2vw, 48px);
}

.site-footer p {
  margin: 16px 0 0;
}

.footer-meta {
  white-space: nowrap;
  font-size: 12px;
}

@media (max-width: 1100px) {
  .search-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .field-search {
    grid-column: span 3;
  }

  .clear-button {
    grid-column: 4;
    grid-row: 1;
  }
}

@media (max-width: 980px) {
  :root {
    --shell: min(100% - 40px, 1480px);
  }

  .site-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

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

  .stat:nth-child(3) {
    border-left: 0;
  }

  .stat:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 740px) {
  .filter-panel {
    position: static;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .search-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .field-search {
    grid-column: 1 / -1;
  }

  .clear-button {
    grid-column: auto;
    grid-row: auto;
    align-self: end;
  }

  .footer-content {
    grid-template-columns: 1fr;
    align-items: start;
  }
}

@media (max-width: 620px) {
  :root {
    --shell: min(100% - 28px, 1480px);
  }

  .top-nav {
    min-height: 62px;
    gap: 12px;
  }

  .nav-actions {
    gap: 6px;
  }

  .intro {
    padding: 44px 0 48px;
  }

  h1 {
    font-size: clamp(44px, 14vw, 62px);
    letter-spacing: -0.06em;
  }

  .intro-copy {
    margin-top: 20px;
    font-size: 16px;
  }

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

  .stat,
  .stat + .stat {
    padding: 18px 14px 20px 0;
  }

  .stat + .stat {
    padding-left: 14px;
  }

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

  .field-search,
  .clear-button {
    grid-column: auto;
  }

  .category-wrap {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .site-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
    gap: 18px;
  }

  .site-card {
    grid-row: auto !important;
  }

  .site-card h3 {
    font-size: 30px;
  }

  .noscript-list ul {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}