:root {
  color-scheme: light;
  --seo-paper: #f5f6f6;
  --seo-surface: #ffffff;
  --seo-ink: #202428;
  --seo-muted: #66717a;
  --seo-line: #cfd5d8;
  --seo-link: #2d6e73;
  --seo-accent: #a06d34;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --seo-paper: #121518;
  --seo-surface: #191d20;
  --seo-ink: #f1f3f3;
  --seo-muted: #b1babf;
  --seo-line: #444d52;
  --seo-link: #9bc6c6;
  --seo-accent: #d5a96d;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--seo-paper);
  color: var(--seo-ink);
  font-family: Inter, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

a { color: inherit; }

.seo-shell { min-height: 100vh; }

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

.seo-header__inner,
.seo-main,
.seo-footer__inner {
  width: min(1140px, calc(100% - 44px));
  margin: 0 auto;
}

.seo-header__inner {
  min-height: 92px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.seo-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--seo-ink);
  text-decoration: none;
  flex: 0 0 auto;
}

.seo-brand img {
  width: 52px;
  height: 52px;
  object-fit: contain;
}

:root[data-theme="dark"] .seo-brand img { filter: invert(1); }

.seo-brand strong {
  font-size: 1.25rem;
  letter-spacing: 0;
}

.seo-brand span {
  color: var(--seo-muted);
  font-size: 0.88rem;
}

.seo-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-left: auto;
  font-size: 0.96rem;
}

.seo-nav a,
.seo-language,
.seo-theme {
  text-decoration: none;
}

.seo-nav a {
  border-bottom: 1px solid transparent;
  padding: 4px 0;
}

.seo-nav a:hover,
.seo-nav a[aria-current="page"] { border-color: currentColor; }

.seo-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.seo-theme {
  width: 34px;
  height: 34px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--seo-line);
  border-radius: 50%;
  background: transparent;
  color: var(--seo-ink);
  cursor: pointer;
  font-size: 1rem;
}

.seo-language {
  color: var(--seo-ink);
  font-size: 0.88rem;
  font-weight: 700;
}

.seo-main { padding: 68px 0 90px; }

.seo-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, 0.8fr);
  gap: 72px;
  align-items: end;
  padding: 50px 0 62px;
  border-bottom: 1px solid var(--seo-line);
}

.seo-kicker {
  margin: 0 0 12px;
  color: var(--seo-accent);
  font-size: 0.95rem;
  font-weight: 700;
}

.seo-title {
  max-width: 850px;
  margin: 0;
  font-family: "Iowan Old Style", "Songti TC", "Noto Serif TC", Georgia, serif;
  font-size: clamp(2.35rem, 5vw, 4.65rem);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: 0;
}

.seo-lead {
  margin: 18px 0 0;
  max-width: 710px;
  color: var(--seo-muted);
  font-size: 1.08rem;
}

.seo-hero__aside {
  margin: 0;
  padding: 0 0 5px;
  color: var(--seo-muted);
  font-size: 0.95rem;
}

.seo-index-links { border-top: 1px solid var(--seo-line); }

.seo-index-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: 25px 0;
  border-bottom: 1px solid var(--seo-line);
  text-decoration: none;
}

.seo-index-link strong,
.seo-resource strong {
  display: block;
  font-size: 1.18rem;
}

.seo-index-link span,
.seo-resource small { color: var(--seo-muted); }

.seo-index-link__arrow,
.seo-resource__arrow { color: var(--seo-accent); font-size: 1.35rem; }

.seo-page-header {
  max-width: 800px;
  margin: 0 0 54px;
}

.seo-page-header .seo-title { font-size: clamp(2.2rem, 4vw, 3.65rem); }

.seo-page-header p { margin-bottom: 0; }

.seo-prose {
  max-width: 790px;
  font-size: 1.05rem;
}

.seo-prose p { margin: 0 0 1.45em; }

.seo-resource-list,
.seo-contact-list { border-top: 1px solid var(--seo-line); }

.seo-resource,
.seo-contact-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 24px;
  align-items: center;
  padding: 23px 0;
  border-bottom: 1px solid var(--seo-line);
  text-decoration: none;
}

.seo-resource__domain { color: var(--seo-muted); font-size: 0.92rem; }

.seo-contact-row { grid-template-columns: 190px minmax(0, 1fr); }

.seo-contact-row strong { font-size: 1rem; }

.seo-contact-row div { color: var(--seo-muted); }

.seo-contact-row a { color: var(--seo-link); }

.seo-note {
  max-width: 790px;
  margin: 46px 0 0;
  color: var(--seo-muted);
  font-size: 0.94rem;
}

.seo-not-found { max-width: 700px; padding: 12vh 0; }

.seo-not-found .seo-title { font-size: clamp(2.5rem, 6vw, 5.5rem); }

.seo-not-found a { color: var(--seo-link); }

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

.seo-footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0 32px;
  color: var(--seo-muted);
  font-size: 0.9rem;
}

.seo-footer a { color: inherit; }

@media (max-width: 820px) {
  .seo-header__inner { min-height: auto; padding: 15px 0; flex-wrap: wrap; gap: 14px 20px; }
  .seo-brand img { width: 42px; height: 42px; }
  .seo-brand strong { font-size: 1.1rem; }
  .seo-brand span { display: none; }
  .seo-nav { order: 3; width: 100%; margin-left: 0; gap: 14px; overflow-x: auto; white-space: nowrap; }
  .seo-controls { margin-left: auto; }
  .seo-main { padding: 36px 0 64px; }
  .seo-hero { grid-template-columns: 1fr; gap: 26px; padding: 28px 0 42px; }
  .seo-title { font-size: clamp(2.2rem, 11vw, 3.75rem); }
  .seo-page-header { margin-bottom: 36px; }
  .seo-resource, .seo-contact-row { gap: 16px; }
  .seo-contact-row { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .seo-header__inner, .seo-main, .seo-footer__inner { width: min(100% - 30px, 1140px); }
  .seo-nav { font-size: 0.9rem; }
  .seo-index-link, .seo-resource { gap: 13px; }
  .seo-index-link strong, .seo-resource strong { font-size: 1.06rem; }
  .seo-resource { grid-template-columns: minmax(0, 1fr) auto; }
  .seo-resource__domain { display: none; }
  .seo-footer__inner { display: block; }
  .seo-footer__inner span { display: block; margin-bottom: 6px; }
}