:root {
  --bg: #f6f3ec;
  --bg-2: #f8f7f2;
  --glow: rgba(229, 140, 58, .18);
  --surface: rgba(255, 255, 255, .76);
  --surface-strong: #ffffff;
  --ink: #17212b;
  --muted: #65707d;
  --line: #e5dccb;
  --brand: #0f5b78;
  --brand-dark: #0b4258;
  --accent: #e58c3a;
  --green: #2f8f69;
  --shadow: 0 24px 70px rgba(23, 33, 43, .10);
  color-scheme: light;
}

html[data-theme="paper"] {
  --bg: #f6f3ec;
  --bg-2: #f8f7f2;
  --glow: rgba(229, 140, 58, .18);
  --surface: rgba(255, 255, 255, .76);
  --surface-strong: #ffffff;
  --ink: #17212b;
  --muted: #65707d;
  --line: #e5dccb;
  --brand: #0f5b78;
  --brand-dark: #0b4258;
  --accent: #e58c3a;
  --green: #2f8f69;
  --shadow: 0 24px 70px rgba(23, 33, 43, .10);
}

html[data-theme="ocean"] {
  --bg: #edf4fb;
  --bg-2: #f7fbff;
  --glow: rgba(67, 145, 213, .20);
  --surface: rgba(255, 255, 255, .80);
  --surface-strong: #ffffff;
  --ink: #12212d;
  --muted: #5d7181;
  --line: #cfe0ee;
  --brand: #1b6ea8;
  --brand-dark: #0f4f7b;
  --accent: #2a98cf;
  --green: #2f8f97;
  --shadow: 0 22px 60px rgba(19, 51, 76, .10);
}

html[data-theme="forest"] {
  --bg: #edf5ee;
  --bg-2: #f7fbf7;
  --glow: rgba(65, 147, 101, .18);
  --surface: rgba(255, 255, 255, .82);
  --surface-strong: #ffffff;
  --ink: #17231d;
  --muted: #5d6f64;
  --line: #d2e2d4;
  --brand: #2f7d57;
  --brand-dark: #215a3e;
  --accent: #76a84f;
  --green: #3f9a6b;
  --shadow: 0 22px 60px rgba(28, 62, 43, .10);
}

html[data-theme="sunset"] {
  --bg: #f9efe7;
  --bg-2: #fff8f1;
  --glow: rgba(236, 132, 84, .20);
  --surface: rgba(255, 255, 255, .82);
  --surface-strong: #ffffff;
  --ink: #24191a;
  --muted: #725d59;
  --line: #ead5c9;
  --brand: #b4532f;
  --brand-dark: #81361c;
  --accent: #e07a3f;
  --green: #8b6d3a;
  --shadow: 0 22px 60px rgba(77, 44, 28, .11);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans TC", "Microsoft JhengHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, var(--glow), transparent 34rem),
    linear-gradient(180deg, var(--surface-strong) 0%, var(--bg) 42%, var(--bg-2) 100%);
  line-height: 1.75;
}

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

a:hover {
  color: var(--brand-dark);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1rem clamp(1rem, 5vw, 4rem);
  background: rgba(255, 250, 240, .86);
  background: color-mix(in srgb, var(--bg) 82%, white 18%);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(229, 220, 203, .8);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  color: var(--ink);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: .9rem;
  color: white;
  background: linear-gradient(135deg, var(--brand), var(--green));
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.25;
}

.brand strong {
  white-space: nowrap;
  font-size: 1.3rem;
}

.brand small {
  color: var(--muted);
  font-size: .78rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: .35rem;
  align-items: center;
}

.site-nav a {
  color: var(--ink);
  padding: .55rem .85rem;
  border-radius: 999px;
  font-size: .95rem;
  min-height: 2.5rem;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

.site-nav a:hover {
  background: rgba(15, 91, 120, .09);
}

.nav-search,
.nav-search.compact-search {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  min-width: 0;
  flex: 0 0 auto;
  flex-wrap: nowrap;
  margin-left: .35rem;
  padding: .18rem .22rem .18rem .48rem;
  border: 1px solid var(--line);
  border-radius: .45rem;
  background: rgba(255, 255, 255, .72);
  white-space: nowrap;
}

.nav-search-label {
  color: var(--muted);
  font-size: .95rem;
  font-weight: 800;
  white-space: nowrap;
}

.nav-search input {
  width: 12ch;
  min-width: 12ch;
  padding: .18rem 0;
  border: 0;
  outline: 0;
  background: transparent;
  font-size: .95rem;
}

.nav-search input::placeholder {
  color: var(--muted);
  font-size: .95rem;
}

.nav-search button {
  min-height: 2rem;
  padding: .18rem .58rem;
  border: 1px solid var(--line);
  border-radius: .35rem;
  color: var(--ink);
  background: rgba(255, 255, 255, .72);
  font: inherit;
  font-size: .95rem;
  font-weight: 700;
  cursor: pointer;
}

.nav-search button:hover {
  background: rgba(15, 91, 120, .09);
}

main {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  align-items: center;
  min-height: auto;
  padding: clamp(1.6rem, 4vw, 2.75rem) 0 .75rem;
}

.hero h1,
.page-hero h1 {
  margin: .2rem 0 1rem;
  max-width: none;
  font-size: clamp(2.4rem, 7vw, 5.8rem);
  line-height: 1.03;
  letter-spacing: 0;
  white-space: nowrap;
}

.lead {
  max-width: 45rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: .8rem;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: .65rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: rgba(255, 255, 255, .6);
  font-weight: 700;
}

.button.primary {
  color: #fff;
  background: var(--brand);
  border-color: var(--brand);
}

.hero-card,
.card,
.knowledge-card,
.article-preview,
.course-card {
  background: var(--surface);
  border: 1px solid rgba(229, 220, 203, .86);
  border-radius: 1.5rem;
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 1.5rem;
}

.home-search-panel {
  display: grid;
  gap: .75rem;
  max-width: 48rem;
  margin-top: 1.5rem;
}

.home-search-panel label {
  color: var(--muted);
  font-weight: 800;
}

.home-search-row,
.compact-search:not(.nav-search) {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: .6rem;
}

.home-search-row input,
.compact-search:not(.nav-search) input {
  width: 100%;
  padding: .9rem 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: var(--surface-strong);
  font: inherit;
}

.site-nav .nav-search {
  display: inline-flex;
  width: auto;
  max-width: max-content;
}

.site-nav .nav-search input {
  width: 12ch;
  min-width: 12ch;
  padding: .18rem 0;
  border: 0;
  border-radius: 0;
}

.search-latest-card h2,
.search-latest-card h3 {
  margin: .4rem 0 .5rem;
}

.latest-list {
  display: grid;
  gap: .75rem;
  margin: .75rem 0 1rem;
  padding: 0;
  list-style: none;
}

.latest-list li {
  display: grid;
  gap: .2rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--line);
}

.latest-list li:last-child {
  border-bottom: 0;
}

.latest-section {
  padding-top: 0;
}

.latest-card-panel {
  display: grid;
  gap: 1rem;
  padding: 1.35rem;
  border: 1px solid rgba(229, 220, 203, .86);
  border-radius: 1.5rem;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.latest-list-single {
  grid-template-columns: 1fr;
  gap: .9rem;
  margin: 0;
}

.latest-list-single li {
  padding-bottom: 1rem;
}

.home-topic-section {
  padding-top: 1.25rem;
}

.home-topic-section .section-heading {
  margin-bottom: .85rem;
}

.mini-article-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .85rem;
}

.mini-article-card {
  display: grid;
  gap: .35rem;
  min-height: 100%;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: color-mix(in srgb, var(--surface-strong) 78%, var(--bg) 22%);
}

.mini-article-card h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.5;
}

.mini-article-card a {
  color: var(--ink);
}

.latest-list a {
  color: var(--ink);
  font-weight: 800;
  line-height: 1.45;
}

.latest-list span {
  color: var(--muted);
  font-size: .85rem;
}

.status-dot {
  display: inline-block;
  width: .75rem;
  height: .75rem;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 .35rem rgba(47, 143, 105, .14);
}

.section,
.page-hero {
  padding: clamp(2.25rem, 5vw, 4rem) 0;
}

.section-heading {
  margin-bottom: 1.5rem;
}

.section-heading h2,
.section h2,
.page-hero h1 {
  margin-top: .25rem;
}

.cards {
  display: grid;
  gap: 1rem;
}

.category-grid {
  display: grid;
  gap: 1rem;
}

.category-grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.category-grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cards.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.card {
  padding: 1.35rem;
}

.category-card {
  display: grid;
  gap: .5rem;
  padding: 1.35rem;
  background: var(--surface);
  border: 1px solid rgba(229, 220, 203, .86);
  border-radius: 1.5rem;
  box-shadow: var(--shadow);
}

.category-card h3 {
  margin: .1rem 0;
  font-size: 1.2rem;
}

.category-card p {
  margin: 0;
  color: var(--muted);
}

.category-card a {
  justify-self: start;
  margin-top: .35rem;
  font-weight: 800;
}

.social-topic-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .9rem;
  margin-top: 1.25rem;
}

.social-topic-card {
  display: grid;
  gap: .45rem;
  padding: 1.1rem;
  border: 1px solid rgba(229, 220, 203, .86);
  border-radius: 1.2rem;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.social-topic-card strong {
  font-size: 1rem;
}

.social-topic-card p {
  margin: 0;
  color: var(--muted);
  font-size: .95rem;
}

.social-topic-card a {
  font-weight: 800;
}

.card-icon {
  color: var(--accent);
  font-weight: 900;
}

.social-overview {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  gap: 1rem;
  align-items: start;
  padding-top: 0;
}

.feature-panel,
.checklist-panel {
  padding: 1.35rem;
  border: 1px solid rgba(229, 220, 203, .86);
  border-radius: 1.5rem;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.feature-panel h2,
.checklist-panel h2 {
  margin-top: .25rem;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  gap: 2rem;
  align-items: start;
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .85rem;
}

.steps li {
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 1rem;
}

.page {
  padding-bottom: 4rem;
}

.page-hero h1 {
  max-width: 18ch;
}

.search-box {
  display: grid;
  gap: .4rem;
  max-width: 38rem;
  margin-top: 1.5rem;
  color: var(--muted);
  font-weight: 700;
}

.search-box input {
  width: 100%;
  padding: .9rem 1rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  color: var(--ink);
  background: var(--surface-strong);
  font: inherit;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.wiki-shell {
  display: grid;
  grid-template-columns: minmax(240px, .72fr) minmax(0, 1.28fr);
  gap: 1.25rem;
  align-items: start;
}

.wiki-main {
  display: grid;
  gap: 1rem;
}

.wiki-article-panel {
  padding: 1.35rem;
  border: 1px solid rgba(229, 220, 203, .86);
  border-radius: 1.4rem;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.wiki-article-panel h2 {
  margin: .2rem 0 .75rem;
}

.wiki-article-list {
  display: grid;
  gap: .9rem;
}

.wiki-sidebar {
  position: sticky;
  top: 6rem;
  display: grid;
  gap: .9rem;
  padding: 1.15rem;
  border: 1px solid rgba(229, 220, 203, .86);
  border-radius: 1.4rem;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.wiki-sidebar h2 {
  margin: 0;
  font-size: 1.1rem;
}

.wiki-nav {
  display: grid;
  gap: .6rem;
}

.wiki-nav a {
  display: block;
  padding: .8rem .95rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  color: var(--ink);
  background: rgba(255, 255, 255, .72);
  font-weight: 700;
}

.wiki-nav a:hover {
  background: rgba(15, 91, 120, .09);
}

.wiki-nav a small {
  display: block;
  margin-top: .2rem;
  color: var(--muted);
  font-size: .82rem;
  font-weight: 600;
}

.course-list-grid {
  display: grid;
  gap: 1rem;
}

.knowledge-card,
.article-preview,
.course-card {
  padding: 1.35rem;
}

.tag,
.meta,
.course-card span {
  color: var(--accent);
  font-size: .85rem;
  font-weight: 800;
}

.knowledge-card h2,
.article-preview h2,
.course-card h2 {
  margin: .2rem 0 .5rem;
}

.article-list,
.timeline {
  display: grid;
  gap: 1rem;
}

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin-top: 1.25rem;
}

.filter-chip {
  min-height: 2.4rem;
  padding: .45rem .8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: var(--surface);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.filter-chip:hover,
.filter-chip.active {
  color: #fff;
  background: var(--brand);
  border-color: var(--brand);
}

.article-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .85rem;
  margin-bottom: 1rem;
}

.article-stats div {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--surface);
}

.article-stats strong,
.article-stats span {
  display: block;
}

.article-stats strong {
  color: var(--brand);
  font-size: 1.8rem;
  line-height: 1.1;
}

.article-stats span {
  color: var(--muted);
  font-size: .92rem;
}

.imported-preview h2 a {
  color: var(--ink);
}

.pagination-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .9rem;
  margin-top: 1.5rem;
}

.pagination-controls button {
  min-height: 2.7rem;
  padding: .65rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: rgba(255, 255, 255, .75);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.pagination-controls button:hover:not(:disabled) {
  background: rgba(15, 91, 120, .09);
}

.pagination-controls button:disabled {
  opacity: .45;
  cursor: not-allowed;
}

.pagination-status {
  color: var(--muted);
  font-weight: 700;
}

.search-empty-state {
  margin: 1.5rem 0 0;
  padding: 1rem 1.2rem;
  border: 1px dashed var(--line);
  border-radius: 1rem;
  color: var(--muted);
  background: rgba(255, 255, 255, .55);
}

.article-page {
  width: min(920px, calc(100% - 2rem));
}

.imported-article {
  padding: clamp(2rem, 5vw, 4rem) 0;
}

.back-link {
  display: inline-flex;
  margin-bottom: 1rem;
  color: var(--brand);
  font-weight: 800;
}

.imported-article h1 {
  margin: .35rem 0 1rem;
  max-width: 100%;
  font-size: 2.8rem;
  line-height: 1.28;
  overflow-wrap: break-word;
  word-break: normal;
}

.article-body {
  color: var(--ink);
  font-size: 1.05rem;
}

.article-body > * + * {
  margin-top: 1rem;
}

.article-body h1,
.article-body h2,
.article-body h3,
.article-body h4 {
  margin-top: 2rem;
  line-height: 1.35;
}

.article-body h1 {
  font-size: 2rem;
}

.article-body h2 {
  font-size: 1.55rem;
}

.article-body h3 {
  font-size: 1.25rem;
}

.article-body img {
  max-width: 100%;
  height: auto;
  border-radius: .75rem;
  border: 1px solid var(--line);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  overflow-wrap: anywhere;
}

.article-body th,
.article-body td {
  padding: .65rem;
  border: 1px solid var(--line);
  vertical-align: top;
}

.article-body blockquote {
  margin: 1rem 0;
  padding: .8rem 1rem;
  border-left: .25rem solid var(--accent);
  background: var(--surface);
}

.timeline {
  position: relative;
}

pre {
  overflow: auto;
  padding: 1rem;
  border-radius: 1rem;
  background: color-mix(in srgb, var(--ink) 92%, black 8%);
  color: #fffaf0;
  line-height: 1.6;
}

.site-footer {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, .7fr) minmax(0, 1.3fr);
  gap: 2rem;
  padding: 2rem 0 3rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.footer-home-link {
  grid-column: 1 / -1;
  justify-self: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.6rem;
  padding: .95rem 1.9rem;
  border: 2px solid var(--brand);
  border-radius: 999px;
  color: var(--brand);
  background: rgba(255, 255, 255, .75);
  font-size: 1.25rem;
  font-weight: 900;
  margin-bottom: .35rem;
}

.footer-home-link:hover {
  color: #fff;
  background: var(--brand);
}

.footer-brand h2 {
  margin: 0;
  color: var(--ink);
  font-size: 1.25rem;
}

.footer-brand p {
  margin: .2rem 0 0;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.footer-links h3 {
  margin: 0 0 .65rem;
  color: var(--ink);
  font-size: 1rem;
}

.footer-links ul {
  display: grid;
  gap: .35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links a {
  color: var(--muted);
}

.footer-links a:hover {
  color: var(--brand);
}

[hidden] {
  display: none !important;
}

@media (max-width: 820px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
  }

  .brand {
    max-width: 100%;
  }

  .brand strong {
    font-size: 1rem;
  }

  .site-nav {
    justify-content: flex-start;
    width: 100%;
  }

  .nav-search {
    width: 100%;
    margin-left: 0;
    border-radius: 1.2rem;
  }

  .hero,
  .split,
  .social-overview,
  .cards.three,
  .cards.two,
  .category-grid.three,
  .category-grid.four,
  .social-topic-grid,
  .mini-article-row,
  .content-grid,
  .wiki-shell {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 2rem;
    padding-bottom: 1rem;
  }

  .hero h1,
  .page-hero h1 {
    max-width: 100%;
    font-size: clamp(2rem, 10vw, 3.2rem);
    letter-spacing: 0;
    white-space: normal;
  }

  .lead {
    font-size: 1rem;
  }

  .hero-actions {
    gap: .6rem;
  }

  .button {
    width: 100%;
  }

  .home-search-row,
  .compact-search,
  .site-footer,
  .footer-links {
    grid-template-columns: 1fr;
  }

  .card,
  .hero-card,
  .feature-panel,
  .checklist-panel,
  .knowledge-card,
  .article-preview,
  .course-card,
  .steps li {
    border-radius: 1.1rem;
  }

  .card,
  .hero-card,
  .feature-panel,
  .checklist-panel,
  .knowledge-card,
  .article-preview,
  .course-card,
  .category-card {
    padding: 1.1rem;
  }

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

  .article-page {
    width: min(920px, calc(100% - 1rem));
  }

  .imported-article h1 {
    max-width: 100%;
    font-size: 2rem;
  }

  .article-body {
    font-size: 1rem;
  }

  .wiki-sidebar {
    position: static;
  }
}

@media (max-width: 520px) {
  main {
    width: min(1120px, calc(100% - 1rem));
  }

  .site-header {
    padding: .9rem .75rem;
  }

  .brand {
    gap: .6rem;
  }

  .brand-mark {
    width: 2.2rem;
    height: 2.2rem;
    border-radius: .75rem;
  }

  .site-nav {
    gap: .45rem;
  }

  .site-nav a {
    width: calc(50% - .225rem);
    justify-content: center;
    font-size: .9rem;
  }

  .nav-search {
    min-width: 100%;
  }

  .nav-search-label {
    padding-left: .15rem;
  }

  .nav-search input,
  .nav-search button {
    width: 100%;
  }

  .hero {
    padding-top: 1.5rem;
  }

  .eyebrow {
    letter-spacing: .12em;
  }

  .search-box input {
    padding: .85rem .9rem;
  }

  pre {
    font-size: .92rem;
  }

  .site-footer {
    width: min(1120px, calc(100% - 1rem));
    padding-bottom: 2rem;
  }
}