@charset "UTF-8";

/*
 * GBA Guide — calm, product-led editorial system.
 * Local, dependency-free styles for the Typecho theme.
 */

:root {
  color-scheme: light;
  --color-bg: #f5f5f7;
  --color-surface: #ffffff;
  --color-surface-muted: #e8e8ed;
  --color-text: #1d1d1f;
  --color-heading: #1d1d1f;
  --color-muted: #6e6e73;
  --color-faint: #86868b;
  --color-line: #e1e1e5;
  --color-line-strong: #d2d2d7;
  --color-accent: #0066cc;
  --color-accent-strong: #004d99;
  --color-accent-soft: #e8f3ff;
  --color-risk: #9a4d45;
  --color-risk-soft: #fbefed;
  --color-success: #356c5d;
  --color-success-soft: #edf6f2;
  --color-header: rgba(250, 250, 252, 0.82);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --shadow-subtle: 0 18px 60px rgba(0, 0, 0, 0.07);
  --shell: 1200px;
  --reading: 760px;
  --header-height: 56px;
  --radius-sm: 12px;
  --radius-md: 28px;
  --transition: 220ms cubic-bezier(0.25, 0.1, 0.25, 1);
}

[data-theme="dark"] {
  color-scheme: dark;
  --color-bg: #000000;
  --color-surface: #1c1c1e;
  --color-surface-muted: #2c2c2e;
  --color-text: #f5f5f7;
  --color-heading: #f5f5f7;
  --color-muted: #a1a1a6;
  --color-faint: #8e8e93;
  --color-line: #333336;
  --color-line-strong: #48484a;
  --color-accent: #2997ff;
  --color-accent-strong: #64b5ff;
  --color-accent-soft: #0b2944;
  --color-risk: #e29a91;
  --color-risk-soft: #392522;
  --color-success: #8bc5b4;
  --color-success-soft: #1d352f;
  --color-header: rgba(22, 22, 23, 0.82);
  --shadow-subtle: 0 20px 60px rgba(0, 0, 0, 0.3);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --color-bg: #000000;
    --color-surface: #1c1c1e;
    --color-surface-muted: #2c2c2e;
    --color-text: #f5f5f7;
    --color-heading: #f5f5f7;
    --color-muted: #a1a1a6;
    --color-faint: #8e8e93;
    --color-line: #333336;
    --color-line-strong: #48484a;
    --color-accent: #2997ff;
    --color-accent-strong: #64b5ff;
    --color-accent-soft: #0b2944;
    --color-risk: #e29a91;
    --color-risk-soft: #392522;
    --color-success: #8bc5b4;
    --color-success-soft: #1d352f;
    --color-header: rgba(22, 22, 23, 0.82);
    --shadow-subtle: 0 20px 60px rgba(0, 0, 0, 0.3);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 28px);
  -webkit-text-size-adjust: 100%;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body,
button,
input,
textarea {
  font-family: var(--font-sans);
}

button,
input,
textarea {
  font-size: 1rem;
}

img,
svg,
video,
iframe {
  max-width: 100%;
}

img {
  height: auto;
}

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-accent-strong);
}

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

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline: 3px solid color-mix(in srgb, var(--color-accent) 35%, transparent);
  outline-offset: 3px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  color: var(--color-heading);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.035em;
}

p,
ul,
ol,
dl,
figure,
blockquote {
  margin-top: 0;
}

button,
input,
textarea {
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
}

input,
textarea {
  width: 100%;
  padding: 0.78rem 0.9rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

input:focus,
textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 13%, transparent);
  outline: none;
}

button {
  min-height: 44px;
  padding: 0.68rem 1.05rem;
  border-color: var(--color-heading);
  background: var(--color-heading);
  color: var(--color-surface);
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}

button:hover {
  border-color: var(--color-accent-strong);
  background: var(--color-accent-strong);
}

[hidden] {
  display: none !important;
}

.site-shell {
  width: min(calc(100% - 40px), var(--shell));
  margin-inline: auto;
}

.site-main {
  min-height: 60vh;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  padding: 0.65rem 0.9rem;
  transform: translateY(-160%);
  background: var(--color-heading);
  color: var(--color-surface);
  text-decoration: none;
}

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

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

.eyebrow,
.section-kicker {
  margin-bottom: 0.75rem;
  color: var(--color-accent);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  line-height: 1.4;
  text-transform: uppercase;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
}

/* Header */

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  height: var(--header-height);
  border-bottom: 1px solid var(--color-line);
  border-bottom-color: color-mix(in srgb, var(--color-line) 76%, transparent);
  background: var(--color-header);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1.25rem;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 0.62rem;
  color: var(--color-heading);
  text-decoration: none;
}

.site-brand:hover {
  color: var(--color-heading);
}

.site-brand__logo-frame {
  display: grid;
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  overflow: hidden;
  place-items: center;
  border-radius: 12px;
  background: #eef4fa;
}

.site-brand__logo {
  width: 52px;
  max-width: none;
  height: 52px;
  object-fit: cover;
  transform: scale(1.08);
}

.site-brand__text {
  display: grid;
  gap: 0.1rem;
  line-height: 1.1;
}

.site-brand__text strong {
  font-size: 0.86rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.site-brand__text small {
  color: var(--color-muted);
  font-size: 0.58rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.site-navigation {
  margin-left: auto;
}

.site-navigation > summary {
  list-style: none;
}

.site-navigation > summary::-webkit-details-marker {
  display: none;
}

.menu-toggle {
  display: none;
}

.site-menu {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.05rem;
}

.site-menu > a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.45rem 0.58rem;
  color: var(--color-text);
  font-size: 0.74rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}

.site-menu > a:hover,
.site-menu > a.is-active {
  color: var(--color-accent);
}

.site-menu > a.is-active {
  position: relative;
}

.site-menu > a.is-active::after {
  position: absolute;
  right: 0.66rem;
  bottom: 6px;
  left: 0.66rem;
  height: 1px;
  background: var(--color-accent);
  content: "";
}

.header-search {
  display: grid;
  grid-template-columns: minmax(92px, 126px) 46px;
  align-items: center;
  margin-left: 0.35rem;
}

.header-search input {
  height: 34px;
  padding: 0.4rem 0.7rem;
  border-right: 0;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  font-size: 0.74rem;
}

.header-search button {
  display: grid;
  min-height: 34px;
  height: 34px;
  padding: 0 0.65rem;
  place-items: center;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.7rem;
}

/* Homepage */

.home-hero {
  display: grid;
  grid-template-columns: 1fr;
  justify-items: center;
  gap: 0;
  padding-top: clamp(5.5rem, 10vw, 8.5rem);
  padding-bottom: clamp(4.5rem, 8vw, 7rem);
  text-align: center;
}

.home-hero__copy {
  max-width: 980px;
}

.home-hero h1 {
  text-wrap: balance;
  font-size: clamp(4rem, 9vw, 7.8rem);
  font-weight: 750;
  line-height: 0.95;
  letter-spacing: -0.075em;
}

.home-hero__tagline {
  margin: 1.5rem 0 0;
  color: var(--color-heading);
  font-size: clamp(1.25rem, 2.4vw, 1.75rem);
  font-weight: 600;
  letter-spacing: -0.015em;
}

.home-hero__intro {
  max-width: 700px;
  margin: 1.2rem auto 0;
  color: var(--color-muted);
  font-size: clamp(1rem, 1.5vw, 1.17rem);
  line-height: 1.75;
}

.home-hero__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.4rem;
  margin-top: 1.8rem;
}

.home-hero__links a {
  color: var(--color-accent);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
}

.home-hero__art {
  width: min(520px, 82vw);
  margin: clamp(2rem, 5vw, 4rem) 0 0;
  overflow: hidden;
  border-radius: 42px;
}

.home-hero__art img {
  display: block;
  width: 100%;
  border-radius: inherit;
}

.home-hero__art--built-in {
  aspect-ratio: 1.2;
  background: #f1f6fc;
}

.home-hero__art--built-in img {
  width: 135%;
  max-width: none;
  margin: -17% 0 0 -17.5%;
  border-radius: 0;
}

.home-stats {
  display: grid;
  width: min(900px, 100%);
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  margin: clamp(2rem, 5vw, 4rem) 0 0;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-color: color-mix(in srgb, var(--color-line) 82%, transparent);
  border-radius: 24px;
  background: var(--color-surface);
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  box-shadow: var(--shadow-subtle);
}

.home-stats > div {
  display: block;
  padding: 1.35rem 1.2rem;
  border-right: 1px solid var(--color-line);
}

.home-stats > div:last-child {
  border-right: 0;
}

.home-stats dt {
  color: var(--color-muted);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
}

.home-stats dd {
  margin: 0;
  color: var(--color-heading);
  margin-top: 0.35rem;
  font-size: 1.25rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.home-section {
  padding-top: clamp(4.5rem, 8vw, 7.5rem);
  padding-bottom: clamp(4.5rem, 8vw, 7.5rem);
}

.home-section--tinted {
  background: var(--color-surface-muted);
}

.home-section--bordered {
  border-top: 1px solid var(--color-line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(240px, 0.72fr);
  align-items: end;
  gap: 3rem;
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}

.section-heading h2 {
  font-size: clamp(2.5rem, 5vw, 4.25rem);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.section-heading > p {
  max-width: 500px;
  margin: 0 0 0.2rem;
  color: var(--color-muted);
  line-height: 1.75;
}

.section-heading--compact {
  margin-bottom: 2rem;
}

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

.domain-item {
  min-height: 280px;
  padding: 1.75rem;
  border: 1px solid var(--color-line);
  border-color: color-mix(in srgb, var(--color-line) 72%, transparent);
  border-radius: 26px;
  background: var(--color-surface);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.035);
  transition: transform var(--transition), box-shadow var(--transition);
}

.domain-item:hover {
  box-shadow: var(--shadow-subtle);
  transform: translateY(-4px);
}

.domain-item__number {
  display: block;
  margin-bottom: 3rem;
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.1em;
}

.domain-item h3 {
  font-size: 1.45rem;
}

.domain-item p {
  min-height: 4.8em;
  margin: 0.85rem 0 1.7rem;
  color: var(--color-muted);
  font-size: 0.9rem;
  line-height: 1.75;
}

.domain-item a {
  display: inline-flex;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
}

.featured-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
  gap: clamp(1rem, 3vw, 2rem);
}

.featured-lead {
  display: flex;
  min-height: 350px;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(2rem, 4vw, 3.2rem);
  overflow: hidden;
  border-radius: 30px;
  background: #0b2239;
  box-shadow: var(--shadow-subtle);
  color: #dce6ed;
}

.featured-lead__meta,
.featured-list__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--color-faint);
  font-size: 0.73rem;
  letter-spacing: 0.045em;
}

.featured-lead__meta a {
  color: #a9c8da;
  text-decoration: none;
}

.featured-lead h3 {
  max-width: 720px;
  margin-top: 1.3rem;
  color: #ffffff;
  font-size: clamp(1.8rem, 3.6vw, 3rem);
}

.featured-lead h3 a {
  color: inherit;
  text-decoration: none;
}

.featured-lead p {
  max-width: 620px;
  margin: 1.15rem 0 1.5rem;
  color: #b9c7d1;
}

.featured-lead > a {
  color: #b8d7e8;
}

.featured-list {
  margin: 0;
  padding: 0.7rem 1.7rem;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-color: color-mix(in srgb, var(--color-line) 72%, transparent);
  border-radius: 30px;
  background: var(--color-surface);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.035);
  list-style: none;
}

.featured-list li {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 1.15rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--color-line);
}

.featured-list__number {
  color: var(--color-faint);
  font-size: 0.72rem;
  font-weight: 700;
}

.featured-list__meta {
  justify-content: flex-start;
  margin-bottom: 0.55rem;
}

.featured-list__meta a {
  color: var(--color-accent);
  text-decoration: none;
}

.featured-list h3 {
  font-size: 1.05rem;
  line-height: 1.45;
}

.featured-list h3 a {
  color: var(--color-heading);
  text-decoration: none;
}

.featured-list h3 a:hover {
  color: var(--color-accent);
}

/* Shared article lists */

.article-list {
  padding-inline: clamp(1rem, 3vw, 2rem);
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-color: color-mix(in srgb, var(--color-line) 72%, transparent);
  border-radius: 28px;
  background: var(--color-surface);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.035);
}

.article-row {
  display: grid;
  grid-template-columns: minmax(110px, 150px) minmax(0, 1fr) 72px;
  align-items: start;
  gap: clamp(1.5rem, 4vw, 3.8rem);
  padding: clamp(1.8rem, 3vw, 2.6rem) 0;
  border-bottom: 1px solid var(--color-line);
}

.article-row__taxonomy {
  padding-top: 0.25rem;
  color: var(--color-accent);
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1.6;
}

.article-row__taxonomy a {
  color: inherit;
  text-decoration: none;
}

.article-row__body h3 {
  font-size: clamp(1.25rem, 2.2vw, 1.65rem);
  line-height: 1.38;
}

.article-row__body h3 a {
  color: var(--color-heading);
  text-decoration: none;
}

.article-row__body h3 a:hover {
  color: var(--color-accent);
}

.article-row__body > p {
  max-width: 760px;
  margin: 0.8rem 0 1rem;
  color: var(--color-muted);
  font-size: 0.92rem;
  line-height: 1.75;
}

.article-row__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1.1rem;
  color: var(--color-faint);
  font-size: 0.74rem;
  font-variant-numeric: tabular-nums;
}

.article-row__read {
  display: grid;
  justify-items: end;
  gap: 0.4rem;
  padding-top: 0.2rem;
  color: var(--color-muted);
  font-size: 0.76rem;
  font-weight: 700;
  text-decoration: none;
}

.article-row__read span:last-child {
  font-size: 1.2rem;
}

.article-row__read:hover {
  color: var(--color-accent);
}

.empty-state {
  padding: 4rem 0;
  border-bottom: 1px solid var(--color-line);
  text-align: center;
}

.empty-state h2,
.empty-state h3 {
  margin-bottom: 0.65rem;
}

.empty-state p {
  margin: 0;
  color: var(--color-muted);
}

.pagination {
  margin-top: 2.2rem;
}

.page-navigator {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-navigator li {
  margin: 0;
}

.page-navigator a,
.page-navigator span {
  display: grid;
  min-width: 42px;
  min-height: 42px;
  padding: 0.45rem 0.7rem;
  place-items: center;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  color: var(--color-text);
  font-size: 0.82rem;
  text-decoration: none;
}

.page-navigator a:hover,
.page-navigator .current a {
  border-color: var(--color-heading);
  background: var(--color-heading);
  color: var(--color-surface);
}

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

.topic-index__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  align-items: start;
  gap: 1rem;
  min-height: 136px;
  padding: 1.5rem;
  border: 1px solid var(--color-line);
  border-color: color-mix(in srgb, var(--color-line) 72%, transparent);
  border-radius: 22px;
  background: var(--color-surface);
  color: var(--color-heading);
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition);
}

.topic-index__item:nth-child(odd) {
  padding-right: 1.5rem;
}

.topic-index__item:nth-child(even) {
  padding-left: 1.5rem;
}

.topic-index__number {
  color: var(--color-faint);
  font-size: 0.72rem;
  font-weight: 700;
}

.topic-index__item strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1rem;
}

.topic-index__item small {
  display: block;
  color: var(--color-muted);
  font-size: 0.8rem;
  line-height: 1.6;
}

.topic-index__arrow {
  color: var(--color-accent);
  font-size: 1rem;
  transition: transform var(--transition);
}

.topic-index__item:hover .topic-index__arrow {
  transform: translate(3px, -3px);
}

.topic-index__item:hover {
  box-shadow: var(--shadow-subtle);
  transform: translateY(-3px);
}

.home-about {
  display: grid;
  grid-template-columns: minmax(240px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(3rem, 8vw, 8rem);
  margin-top: clamp(2rem, 4vw, 4rem);
  margin-bottom: clamp(2rem, 4vw, 4rem);
  padding: clamp(2rem, 6vw, 5rem);
  border-radius: 32px;
  background: #0b2239;
  color: #f5f5f7;
}

.home-about h2 {
  color: #ffffff;
  font-size: clamp(2.3rem, 4.5vw, 3.8rem);
  letter-spacing: -0.05em;
}

.home-about__content > p {
  max-width: 720px;
  margin-bottom: 1.7rem;
  color: #c6d2dc;
  font-size: 1.04rem;
  line-height: 1.9;
}

.home-about__content nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.home-about__content nav a {
  color: #ffffff;
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
}

.contact-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 2.2rem 0 0;
}

.contact-panel > div {
  min-width: 0;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.07);
}

.contact-panel dt {
  margin-bottom: 0.28rem;
  color: #8fb8d5;
  font-size: 0.68rem;
}

.contact-panel dd {
  margin: 0;
  overflow-wrap: anywhere;
  color: #ffffff;
  font-size: 0.86rem;
  font-weight: 600;
}

.contact-panel a {
  color: inherit;
  text-decoration: none;
}

/* Archive and search */

.archive-hero,
.search-hero {
  border-bottom: 1px solid var(--color-line);
  background: var(--color-surface-muted);
  background: color-mix(in srgb, var(--color-surface-muted) 58%, var(--color-bg));
}

.archive-hero__inner,
.search-hero__inner {
  padding-top: clamp(3.5rem, 7vw, 6rem);
  padding-bottom: clamp(3.5rem, 7vw, 5.5rem);
}

.archive-hero h1,
.search-hero h1 {
  max-width: 900px;
  font-size: clamp(3rem, 7vw, 5.8rem);
  letter-spacing: -0.06em;
}

.archive-hero__inner > p:not(.eyebrow),
.search-hero__inner > p:not(.eyebrow) {
  max-width: 680px;
  margin: 1.2rem 0 0;
  color: var(--color-muted);
  font-size: 1.02rem;
  line-height: 1.8;
}

.archive-hero__count {
  display: inline-block;
  margin-top: 1.5rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--color-line-strong);
  color: var(--color-accent);
  font-size: 0.78rem;
  font-weight: 700;
}

.archive-content,
.search-results {
  padding-top: clamp(3rem, 6vw, 5rem);
  padding-bottom: clamp(4rem, 7vw, 6rem);
}

.search-form {
  display: grid;
  grid-template-columns: minmax(0, 680px) auto;
  max-width: 810px;
  margin-top: 2rem;
}

.search-form input {
  min-height: 52px;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.search-form button {
  min-height: 52px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.category-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.4rem;
}

.category-chips a {
  padding: 0.42rem 0.7rem;
  border: 1px solid var(--color-line-strong);
  border-radius: 999px;
  color: var(--color-muted);
  font-size: 0.76rem;
  text-decoration: none;
}

.category-chips a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Post and page */

.article-main {
  padding-bottom: clamp(4rem, 8vw, 7rem);
}

.article-shell {
  width: min(calc(100% - 40px), 1120px);
  margin-inline: auto;
}

.article-hero {
  max-width: 900px;
  margin-inline: auto;
  padding-top: clamp(5rem, 10vw, 9rem);
  padding-bottom: clamp(2.5rem, 5vw, 4rem);
  border-bottom: 1px solid var(--color-line);
  text-align: center;
}

.article-hero__category {
  margin-bottom: 1.3rem;
  color: var(--color-accent);
  font-size: 0.76rem;
  font-weight: 750;
  letter-spacing: 0.07em;
}

.article-hero__category a {
  color: inherit;
  text-decoration: none;
}

.article-hero h1 {
  text-wrap: balance;
  font-size: clamp(2.6rem, 6.5vw, 5.4rem);
  line-height: 1.04;
  letter-spacing: -0.06em;
}

.article-byline {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.7rem 1.5rem;
  margin-top: 1.8rem;
  color: var(--color-muted);
  font-size: 0.76rem;
}

.article-byline a {
  color: var(--color-text);
  text-decoration: none;
}

.article-byline__label {
  margin-right: 0.3rem;
  color: var(--color-faint);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, var(--reading)) 220px;
  justify-content: center;
  align-items: start;
  gap: clamp(3rem, 6vw, 6rem);
  padding-top: clamp(3rem, 6vw, 5rem);
}

.article-content {
  min-width: 0;
  color: var(--color-text);
  font-size: clamp(1rem, 1.25vw, 1.08rem);
  line-height: 1.88;
}

.article-content > *:first-child {
  margin-top: 0;
}

.article-content p {
  margin-bottom: 1.35em;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4 {
  scroll-margin-top: calc(var(--header-height) + 28px);
}

.article-content h1 {
  margin: 2.5em 0 0.75em;
  font-size: 2rem;
}

.article-content h2 {
  margin: 2.6em 0 0.85em;
  padding-top: 0.8em;
  border-top: 1px solid var(--color-line);
  font-size: clamp(1.55rem, 3vw, 2rem);
}

.article-content h3 {
  margin: 2.1em 0 0.75em;
  font-size: clamp(1.22rem, 2vw, 1.45rem);
}

.article-content h4 {
  margin: 1.8em 0 0.65em;
  font-size: 1.08rem;
}

.article-content ul,
.article-content ol {
  margin: 0 0 1.4em;
  padding-left: 1.45em;
}

.article-content li {
  margin-bottom: 0.45em;
  padding-left: 0.2em;
}

.article-content a {
  overflow-wrap: anywhere;
  font-weight: 600;
}

.article-content blockquote {
  margin: 1.8em 0;
  padding: 1.1rem 1.25rem;
  border-left: 3px solid var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-text);
  border-radius: 0 14px 14px 0;
}

.article-content blockquote > :last-child {
  margin-bottom: 0;
}

.article-content hr {
  height: 1px;
  margin: 3rem 0;
  border: 0;
  background: var(--color-line-strong);
}

.article-content figure {
  margin: 2rem 0;
}

.article-content figcaption {
  margin-top: 0.65rem;
  color: var(--color-muted);
  font-size: 0.78rem;
  text-align: center;
}

.article-content img {
  display: block;
  max-width: 100%;
  height: auto;
  margin-inline: auto;
  border-radius: 18px;
}

.article-content table {
  display: block;
  width: 100%;
  max-width: 100%;
  margin: 1.8rem 0;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-collapse: collapse;
  border-spacing: 0;
  background: var(--color-surface);
  -webkit-overflow-scrolling: touch;
}

.article-content thead {
  background: var(--color-surface-muted);
}

.article-content th,
.article-content td {
  min-width: 130px;
  padding: 0.78rem 0.9rem;
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  font-size: 0.86rem;
  line-height: 1.55;
  text-align: left;
  vertical-align: top;
}

.article-content th {
  color: var(--color-heading);
  font-weight: 700;
  white-space: nowrap;
}

.article-content tr:last-child td {
  border-bottom: 0;
}

.article-content th:last-child,
.article-content td:last-child {
  border-right: 0;
}

.article-content code,
.article-content kbd {
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.article-content code {
  padding: 0.15em 0.36em;
  background: var(--color-surface-muted);
  color: var(--color-accent-strong);
}

.article-content pre {
  max-width: 100%;
  margin: 1.8rem 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-heading);
  color: #d8e2e9;
  line-height: 1.65;
}

.article-content pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.article-content .callout,
.article-content .callout-note,
.article-content .callout-update,
.article-content .callout-summary,
.article-content .callout-risk {
  margin: 1.8rem 0;
  padding: 1.05rem 1.2rem;
  border: 1px solid var(--color-line-strong);
  border-left: 4px solid var(--color-accent);
  background: var(--color-accent-soft);
}

.article-content .callout-update {
  border-left-color: var(--color-success);
  background: var(--color-success-soft);
}

.article-content .callout-risk {
  border-left-color: var(--color-risk);
  background: var(--color-risk-soft);
}

.article-content .callout,
.article-content .callout-note,
.article-content .callout-update,
.article-content .callout-summary,
.article-content .callout-risk {
  border-radius: 16px;
}

.article-content .callout > :last-child,
.article-content .callout-note > :last-child,
.article-content .callout-update > :last-child,
.article-content .callout-summary > :last-child,
.article-content .callout-risk > :last-child {
  margin-bottom: 0;
}

.article-content .protected {
  padding: 1.2rem;
  border: 1px solid var(--color-line);
  background: var(--color-surface-muted);
}

.article-toc {
  position: sticky;
  top: calc(var(--header-height) + 34px);
  max-height: calc(100vh - var(--header-height) - 68px);
  overflow-y: auto;
}

.article-toc__title {
  margin-bottom: 0.85rem;
  color: var(--color-heading);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.08em;
}

.article-toc__mobile {
  display: none;
}

.toc-list {
  margin: 0;
  padding: 0 0 0 0.85rem;
  border-left: 1px solid var(--color-line);
  list-style: none;
}

.toc-list__item {
  margin: 0;
}

.toc-list__item a {
  display: block;
  padding: 0.38rem 0;
  color: var(--color-muted);
  font-size: 0.76rem;
  line-height: 1.45;
  text-decoration: none;
  transition: color var(--transition), transform var(--transition);
}

.toc-list__item--h3 a {
  padding-left: 0.8rem;
  font-size: 0.72rem;
}

.toc-list__item a:hover,
.toc-list__item a.is-active {
  color: var(--color-accent);
}

.toc-list__item a.is-active {
  transform: translateX(3px);
  font-weight: 700;
}

.article-footer {
  max-width: var(--reading);
  margin: clamp(3rem, 6vw, 5rem) auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-line-strong);
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
}

.article-tags > span {
  margin-right: 0.35rem;
  color: var(--color-muted);
  font-weight: 700;
}

.article-tags a {
  padding: 0.34rem 0.62rem;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  color: var(--color-muted);
  text-decoration: none;
}

.article-tags a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.article-disclaimer {
  margin: 1.5rem 0 0;
  padding: 1rem 1.1rem;
  border-left: 3px solid var(--color-line-strong);
  background: var(--color-surface-muted);
  color: var(--color-muted);
  font-size: 0.76rem;
  line-height: 1.75;
  border-radius: 0 14px 14px 0;
}

.post-navigation {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 920px;
  margin: clamp(3rem, 6vw, 5rem) auto 0;
  border-block: 1px solid var(--color-line);
}

.post-navigation__item {
  display: grid;
  gap: 0.45rem;
  min-height: 130px;
  align-content: center;
  padding: 1.4rem;
}

.post-navigation__item + .post-navigation__item {
  border-left: 1px solid var(--color-line);
  text-align: right;
}

.post-navigation__item > span {
  color: var(--color-faint);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.post-navigation__item a {
  color: var(--color-heading);
  font-weight: 700;
  line-height: 1.5;
  text-decoration: none;
}

.post-navigation__item a:hover {
  color: var(--color-accent);
}

.page-main {
  padding-top: clamp(3.5rem, 7vw, 6rem);
  padding-bottom: clamp(4rem, 8vw, 7rem);
}

.page-shell {
  width: min(calc(100% - 40px), 880px);
  margin-inline: auto;
}

.page-hero {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-line);
}

.page-hero h1 {
  font-size: clamp(2.5rem, 5.5vw, 4.4rem);
}

.page-hero__updated {
  margin: 1.1rem 0 0;
  color: var(--color-muted);
  font-size: 0.78rem;
}

.page-content {
  max-width: var(--reading);
  font-size: 1.04rem;
  line-height: 1.85;
}

.page-content h2 {
  margin: 2.4em 0 0.8em;
  font-size: 1.75rem;
}

.page-content h3 {
  margin: 2em 0 0.7em;
  font-size: 1.35rem;
}

.page-content p,
.page-content ul,
.page-content ol {
  margin-bottom: 1.3em;
}

/* Comments */

.comments-shell {
  width: min(calc(100% - 40px), 880px);
  margin: clamp(4rem, 8vw, 7rem) auto 0;
  padding-top: clamp(3rem, 6vw, 5rem);
  border-top: 1px solid var(--color-line-strong);
}

.comments-shell--page {
  margin-top: 4rem;
}

.comments__heading,
.respond__heading {
  margin-bottom: 2rem;
}

.comments__heading h2,
.respond__heading h2 {
  font-size: clamp(1.65rem, 3vw, 2.2rem);
}

.respond__heading > p:last-child {
  margin: 0.7rem 0 0;
  color: var(--color-muted);
  font-size: 0.86rem;
}

.comment-list,
.comment-children {
  margin: 0;
  padding: 0;
  list-style: none;
}

.comment-list {
  border-top: 1px solid var(--color-line);
}

.comment-body {
  margin: 0;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--color-line);
}

.comment-children {
  margin-left: 2.2rem;
  padding-left: 1.2rem;
  border-left: 1px solid var(--color-line);
}

.comment-author {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.comment-author .avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
}

.comment-author cite,
.comment-author cite a {
  color: var(--color-heading);
  font-size: 0.86rem;
  font-style: normal;
  font-weight: 700;
  text-decoration: none;
}

.comment-by-author > .comment-body .comment-author::after,
.comment-by-author > .comment-author::after {
  padding: 0.12rem 0.38rem;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  content: "作者";
  font-size: 0.64rem;
  font-style: normal;
}

.comment-meta {
  display: inline-block;
  margin-left: 0.5rem;
}

.comment-meta a,
.comment-reply a {
  color: var(--color-faint);
  font-size: 0.72rem;
  text-decoration: none;
}

.comment-content {
  margin-top: 1rem;
  color: var(--color-text);
  font-size: 0.9rem;
  line-height: 1.75;
}

.comment-content > :last-child {
  margin-bottom: 0;
}

.comment-reply {
  margin-top: 0.75rem;
}

.comment-awaiting-moderation {
  display: inline-block;
  margin: 0.8rem 0 0;
  color: var(--color-risk);
  font-size: 0.74rem;
}

.respond {
  margin-top: 3.5rem;
}

.comment-body .respond {
  margin: 1.5rem 0 0;
  padding: 1.2rem;
  background: var(--color-surface-muted);
}

.cancel-comment-reply {
  margin-bottom: 0.8rem;
  font-size: 0.78rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.form-field {
  margin-bottom: 1.1rem;
}

.form-field label {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--color-heading);
  font-size: 0.78rem;
  font-weight: 700;
}

.form-field label span {
  color: var(--color-faint);
  font-weight: 400;
}

.comment-form textarea {
  resize: vertical;
}

.logged-in-as {
  color: var(--color-muted);
  font-size: 0.82rem;
}

.submit-button {
  min-width: 130px;
}

.comments-closed {
  color: var(--color-muted);
  text-align: center;
}

/* Footer */

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

.site-footer__grid {
  display: grid;
  grid-template-columns: minmax(240px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(3rem, 7vw, 7rem);
  padding-top: clamp(3rem, 6vw, 5rem);
  padding-bottom: clamp(3rem, 6vw, 5rem);
}

.site-footer__brand > a {
  display: inline-grid;
  color: var(--color-heading);
  text-decoration: none;
}

.site-footer__brand strong {
  font-size: 1.35rem;
  letter-spacing: -0.035em;
}

.site-footer__brand span {
  margin-top: 0.2rem;
  color: var(--color-muted);
  font-size: 0.68rem;
  font-weight: 650;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-footer__brand p {
  max-width: 440px;
  margin: 1.2rem 0 0;
  color: var(--color-muted);
  font-size: 0.88rem;
}

.site-footer__nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.site-footer__nav > div {
  display: grid;
  align-content: start;
  gap: 0.65rem;
}

.site-footer__nav strong {
  margin-bottom: 0.25rem;
  color: var(--color-heading);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
}

.site-footer__nav a,
.site-footer__nav span {
  color: var(--color-muted);
  font-size: 0.8rem;
  text-decoration: none;
}

.site-footer__nav a:hover {
  color: var(--color-accent);
}

.site-footer__contact span,
.site-footer__contact a {
  display: grid;
  gap: 0.08rem;
  overflow-wrap: anywhere;
}

.site-footer__contact small {
  color: var(--color-faint);
  font-size: 0.62rem;
  font-weight: 500;
}

.site-footer__legal {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
  border-top: 1px solid var(--color-line);
}

.site-footer__legal p {
  margin: 0;
  color: var(--color-faint);
  font-size: 0.68rem;
}

.site-footer__legal a {
  color: inherit;
}

/* Error page */

.error-page {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1.3fr);
  align-items: center;
  gap: clamp(2rem, 8vw, 8rem);
  min-height: calc(100vh - var(--header-height) - 260px);
  padding-top: 5rem;
  padding-bottom: 5rem;
}

.error-page__code {
  margin: 0;
  color: var(--color-line-strong);
  font-size: clamp(6rem, 18vw, 13rem);
  font-weight: 800;
  letter-spacing: -0.08em;
  line-height: 0.8;
}

.error-page h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
}

.error-page > div > p:not(.eyebrow) {
  max-width: 620px;
  margin: 1.2rem 0 0;
  color: var(--color-muted);
}

.error-page__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
}

.button-link {
  display: inline-grid;
  min-height: 46px;
  padding: 0.7rem 1.1rem;
  place-items: center;
  background: var(--color-heading);
  color: var(--color-surface);
  font-size: 0.86rem;
  font-weight: 700;
  text-decoration: none;
}

.button-link:hover {
  background: var(--color-accent-strong);
  color: #ffffff;
}

.error-search {
  display: grid;
  grid-template-columns: minmax(180px, 280px) auto;
}

.error-search input {
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.error-search button {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* Classic helper compatibility */

.entry-header {
  margin-bottom: 1.5rem;
}

.entry-title {
  margin-bottom: 0.75rem;
}

.entry-title a {
  color: var(--color-heading);
  text-decoration: none;
}

.entry-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  color: var(--color-muted);
  font-size: 0.78rem;
}

/* Responsive */

@media (max-width: 1020px) {
  .domain-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .article-layout {
    grid-template-columns: minmax(0, 700px) 190px;
    gap: 2.5rem;
  }
}

@media (max-width: 900px) {
  :root {
    --header-height: 56px;
  }

  .site-navigation {
    position: relative;
  }

  .menu-toggle {
    display: flex;
    min-width: 74px;
    min-height: 44px;
    align-items: center;
    justify-content: flex-end;
    gap: 0.65rem;
    color: var(--color-heading);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 700;
  }

  .menu-toggle__icon,
  .menu-toggle__icon::before,
  .menu-toggle__icon::after {
    display: block;
    width: 19px;
    height: 1.5px;
    background: currentColor;
    content: "";
    transition: transform var(--transition);
  }

  .menu-toggle__icon {
    position: relative;
  }

  .menu-toggle__icon::before {
    position: absolute;
    top: -6px;
  }

  .menu-toggle__icon::after {
    position: absolute;
    top: 6px;
  }

  .site-navigation[open] .menu-toggle__icon {
    background: transparent;
  }

  .site-navigation[open] .menu-toggle__icon::before {
    top: 0;
    transform: rotate(45deg);
  }

  .site-navigation[open] .menu-toggle__icon::after {
    top: 0;
    transform: rotate(-45deg);
  }

  .site-navigation:not([open]) .site-menu {
    display: none;
  }

  .site-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    display: grid;
    width: min(88vw, 360px);
    padding: 0.8rem;
    border: 1px solid var(--color-line);
    border-radius: 20px;
    background: var(--color-surface);
    box-shadow: var(--shadow-subtle);
  }

  .site-menu > a {
    justify-content: space-between;
    padding-inline: 0.8rem;
    border-bottom: 1px solid var(--color-line);
  }

  .site-menu > a.is-active::after {
    top: 50%;
    right: 0.4rem;
    bottom: auto;
    left: auto;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    transform: translateY(-50%);
  }

  .header-search {
    grid-template-columns: 1fr 44px;
    margin: 0.8rem 0 0;
  }

  .header-search input,
  .header-search button {
    height: 44px;
  }

  .home-hero {
    grid-template-columns: 1fr;
    gap: 0;
  }

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

  .home-stats > div {
    padding: 1rem;
    border-right: 1px solid var(--color-line);
  }

  .home-stats > div:last-child {
    border-right: 0;
  }

  .home-stats dd {
    margin-top: 0.35rem;
  }

  .featured-layout {
    grid-template-columns: 1fr;
  }

  .featured-lead {
    min-height: 320px;
  }

  .article-layout {
    display: flex;
    max-width: var(--reading);
    flex-direction: column;
    margin-inline: auto;
    gap: 2rem;
  }

  .article-toc {
    position: static;
    order: -1;
    width: 100%;
    max-height: none;
    overflow: visible;
  }

  .article-toc__desktop {
    display: none;
  }

  .article-toc__mobile {
    display: block;
    border-block: 1px solid var(--color-line);
  }

  .article-toc__mobile summary {
    min-height: 48px;
    padding: 0.75rem 0;
    color: var(--color-heading);
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 700;
  }

  .article-toc__mobile nav {
    padding-bottom: 1rem;
  }

  .toc-list {
    columns: 2;
    column-gap: 2rem;
  }

  .toc-list__item {
    break-inside: avoid;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .site-shell,
  .article-shell,
  .page-shell,
  .comments-shell {
    width: min(calc(100% - 32px), var(--shell));
  }

  .site-brand__text small {
    display: none;
  }

  .home-hero {
    padding-top: 4.5rem;
    padding-bottom: 4.5rem;
  }

  .home-hero h1 {
    font-size: clamp(3rem, 15vw, 4.7rem);
  }

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

  .home-stats > div {
    display: grid;
    padding: 0.9rem 0;
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
  }

  .home-stats > div:last-child {
    border-bottom: 0;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

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

  .domain-item,
  .domain-item:nth-child(2) {
    min-height: auto;
    border: 1px solid var(--color-line);
    border-color: color-mix(in srgb, var(--color-line) 72%, transparent);
  }

  .domain-item__number {
    margin-bottom: 1.4rem;
  }

  .domain-item p {
    min-height: 0;
  }

  .featured-lead {
    min-height: 360px;
  }

  .featured-lead__meta {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.35rem;
  }

  .article-row {
    grid-template-columns: 1fr auto;
    gap: 0.7rem 1rem;
  }

  .article-row__taxonomy {
    grid-column: 1 / -1;
  }

  .article-row__body {
    grid-column: 1;
  }

  .article-row__read {
    grid-column: 2;
    grid-row: 2;
  }

  .article-row__read span:first-child {
    display: none;
  }

  .article-row__body > p {
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
  }

  .topic-index {
    grid-template-columns: 1fr;
  }

  .topic-index__item,
  .topic-index__item:nth-child(odd),
  .topic-index__item:nth-child(even) {
    padding: 1.35rem;
    border: 1px solid var(--color-line);
    border-color: color-mix(in srgb, var(--color-line) 72%, transparent);
  }

  .home-about {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 2rem 1.35rem;
    border-radius: 24px;
  }

  .contact-panel {
    grid-template-columns: 1fr;
  }

  .search-form {
    grid-template-columns: 1fr;
    gap: 0.65rem;
  }

  .search-form input,
  .search-form button {
    border-radius: var(--radius-sm);
  }

  .article-hero {
    padding-top: 3.5rem;
  }

  .article-hero h1 {
    font-size: clamp(2.1rem, 10vw, 3.2rem);
  }

  .article-byline {
    justify-content: flex-start;
    padding-top: 1rem;
    border-top: 1px solid var(--color-line);
    text-align: left;
  }

  .article-content {
    font-size: 1rem;
    line-height: 1.82;
  }

  .article-content h2 {
    font-size: 1.5rem;
  }

  .article-content table {
    width: calc(100vw - 32px);
  }

  .toc-list {
    columns: 1;
  }

  .post-navigation {
    grid-template-columns: 1fr;
  }

  .post-navigation__item + .post-navigation__item {
    border-top: 1px solid var(--color-line);
    border-left: 0;
  }

  .comment-children {
    margin-left: 0.8rem;
    padding-left: 0.8rem;
  }

  .form-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .site-footer__nav {
    grid-template-columns: 1fr;
  }

  .site-footer__legal {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }

  .error-page {
    grid-template-columns: 1fr;
    min-height: auto;
    gap: 2.5rem;
  }

  .error-page__code {
    font-size: 7rem;
  }

  .error-search {
    grid-template-columns: 1fr;
    width: 100%;
    gap: 0.65rem;
  }

  .error-search input,
  .error-search button {
    border-radius: var(--radius-sm);
  }
}

@media (max-width: 420px) {
  .site-shell,
  .article-shell,
  .page-shell,
  .comments-shell {
    width: min(calc(100% - 24px), var(--shell));
  }

  .site-brand {
    gap: 0.5rem;
  }

  .site-brand__logo-frame {
    width: 34px;
    height: 34px;
    flex-basis: 34px;
  }

  .menu-toggle__label {
    display: none;
  }

  .menu-toggle {
    min-width: 44px;
  }

  .home-hero h1 {
    font-size: 3.1rem;
  }

  .home-hero__tagline {
    font-size: 1rem;
  }

  .home-hero__links {
    align-items: center;
    flex-direction: column;
    gap: 0.75rem;
  }

  .featured-lead {
    min-height: 330px;
    padding: 1.5rem;
  }

  .featured-lead h3 {
    font-size: 1.7rem;
  }

  .article-row__body h3 {
    font-size: 1.2rem;
  }

  .article-content table {
    width: calc(100vw - 24px);
  }

  .site-footer__nav {
    gap: 1rem;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms;
    animation-iteration-count: 1;
    scroll-behavior: auto;
    transition-duration: 0.01ms;
  }
}