:root {
  --page: #f6f8f6;
  --surface: #ffffff;
  --surface-soft: #fbfcfb;
  --ink: #18211d;
  --body: #526059;
  --muted: #7b8781;
  --line: #dfe6e1;
  --line-strong: #cbd6cf;
  --accent: #176b54;
  --accent-strong: #0f5744;
  --accent-soft: #eaf4ef;
  --blue: #315f7d;
  --amber: #8b5e27;
  --serif: "Songti SC", STSong, "Noto Serif CJK SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --max: 1120px;
  --radius: 8px;
  color: var(--ink);
  background: var(--page);
}

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

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--page);
  color: var(--ink);
  font-family: var(--sans);
  text-rendering: optimizeLegibility;
}

[hidden] {
  display: none !important;
}

#top,
#essays,
#toolbox,
#about {
  scroll-margin-top: 76px;
}

.site-shell {
  width: min(var(--max), calc(100vw - 48px));
  margin-inline: auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid rgba(223, 230, 225, 0.92);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
}

.nav {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  border-radius: 8px;
}

.brand .brand-copy {
  display: grid;
  gap: 2px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: inherit;
  letter-spacing: 0;
  text-transform: none;
}

.brand strong {
  font-size: 17px;
  line-height: 1.05;
  letter-spacing: 0;
}

.brand .brand-copy > span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.06em;
  line-height: 1.1;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: nowrap;
  color: var(--body);
  font-size: 14px;
}

.nav-links a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  text-decoration: none;
  transition: background 160ms ease-out, color 160ms ease-out;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background: var(--accent-soft);
  color: var(--accent-strong);
  outline: none;
}

.nav-links .primary-link {
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink);
}

.hero {
  padding: 84px 0 72px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 0.42fr);
  gap: 72px;
  align-items: end;
}

.garden-label,
.kicker,
.section-eyebrow,
.focus-label {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.4;
  text-transform: uppercase;
}

.garden-label::before {
  display: inline-block;
  width: 28px;
  height: 1px;
  margin-right: 10px;
  vertical-align: middle;
  background: var(--accent);
  content: "";
}

.hero h1 {
  max-width: 760px;
  margin: 22px 0 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 60px;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: 0;
  text-wrap: balance;
}

.hero-role {
  margin-top: 18px;
  color: var(--accent-strong);
  font-size: 15px;
  font-weight: 650;
  line-height: 1.6;
}

.hero-intro {
  max-width: 720px;
  margin-top: 10px;
}

.hero-intro .lede {
  margin: 0;
  color: var(--body);
  font-size: 18px;
  line-height: 1.78;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0;
  line-height: 1;
  text-decoration: none;
  text-transform: none;
  transition: background 160ms ease-out, border-color 160ms ease-out, color 160ms ease-out, transform 160ms ease-out;
}

.button:hover,
.button:focus-visible {
  border-color: var(--accent);
  color: var(--accent-strong);
  outline: none;
  transform: translateY(-1px);
}

.button:active {
  transform: translateY(0);
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #ffffff;
}

.button.primary:hover,
.button.primary:focus-visible {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
  color: #ffffff;
}

.button.small {
  min-height: 40px;
  padding-inline: 13px;
  font-size: 13px;
}

.wechat-copy-button {
  border-color: #b9d5c9;
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.hero-focus {
  padding-left: 28px;
  border-left: 1px solid var(--line);
}

.hero-focus h2 {
  margin: 12px 0 4px;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 24px;
  line-height: 1.3;
  letter-spacing: 0;
}

.focus-list {
  display: grid;
  margin-top: 14px;
}

.focus-link {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  color: var(--body);
  font-size: 14px;
  line-height: 1.55;
  text-decoration: none;
}

.focus-link span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
}

.focus-link:hover,
.focus-link:focus-visible {
  color: var(--accent-strong);
  outline: none;
}

.section {
  padding: 80px 0;
  border-bottom: 1px solid var(--line);
  background: var(--page);
}

#essays,
#about {
  background: var(--surface);
}

.content-section-head,
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(300px, 1fr);
  gap: 72px;
  align-items: end;
  margin-bottom: 32px;
}

.content-section-head h2,
.section-head h2,
.about-card h2 {
  margin: 8px 0 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 38px;
  line-height: 1.2;
  letter-spacing: 0;
  text-wrap: balance;
}

.content-section-head p,
.section-copy {
  margin: 0;
  max-width: 610px;
  color: var(--body);
  font-size: 15px;
  line-height: 1.75;
  text-wrap: pretty;
}

.article-board {
  max-width: 940px;
}

.article-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.filter-button {
  min-height: 38px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--body);
  font-size: 13px;
  cursor: pointer;
  transition: background 160ms ease-out, border-color 160ms ease-out, color 160ms ease-out;
}

.filter-button:hover,
.filter-button:focus-visible,
.filter-button.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
  outline: none;
}

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

.essay-row {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.article-index {
  padding-top: 4px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1;
}

.essay-row h3 {
  margin: 7px 0 8px;
  font-family: var(--sans);
  font-size: 22px;
  line-height: 1.35;
  letter-spacing: 0;
  text-wrap: balance;
}

.essay-row.is-featured {
  padding-block: 30px;
}

.essay-row.is-featured h3 {
  max-width: 800px;
  font-size: 28px;
}

.essay-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  line-height: 1.4;
  text-transform: uppercase;
}

.essay-meta .featured-label {
  color: var(--accent);
}

.article-title-link,
.article-title-text {
  color: var(--ink);
  font-weight: 720;
  text-decoration: none;
}

.article-title-link:hover,
.article-title-link:focus-visible {
  color: var(--accent-strong);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
  outline: none;
}

.essay-row p {
  margin: 0;
  max-width: 800px;
  color: var(--body);
  font-size: 15px;
  line-height: 1.72;
  text-wrap: pretty;
}

.article-pagination {
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
}

.article-pagination[hidden] {
  display: none;
}

.page-button {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--surface);
  color: var(--body);
  font-family: var(--mono);
  font-size: 13px;
  cursor: pointer;
  transition: background 160ms ease-out, border-color 160ms ease-out, color 160ms ease-out;
}

.page-button:hover,
.page-button:focus-visible,
.page-button.is-active {
  border-color: var(--accent);
  background: var(--accent);
  color: #ffffff;
  outline: none;
  transform: none;
}

.resources-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.96fr) minmax(340px, 1.04fr);
  gap: 24px;
  align-items: start;
}

.resource-list {
  display: grid;
  gap: 12px;
}

.resource-item {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.resource-item:nth-child(n) {
  background: var(--surface);
}

.resource-kind {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.resource-status {
  margin-left: 0;
  color: var(--muted);
}

.resource-item h3 {
  margin: 8px 0 0;
  color: var(--ink);
  font-size: 17px;
  line-height: 1.4;
  letter-spacing: 0;
  text-wrap: pretty;
}

.resource-item p {
  margin: 8px 0 0;
  color: var(--body);
  font-size: 14px;
  line-height: 1.68;
  text-wrap: pretty;
}

.resource-file-meta {
  display: flex;
  gap: 10px;
  margin-top: 10px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.resource-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.template-panel {
  position: sticky;
  top: 84px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
}

.template-head,
.template-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  border-color: var(--line);
  color: var(--body);
  background: var(--surface-soft);
}

.template-head {
  border-bottom: 1px solid var(--line);
}

.template-head strong {
  color: var(--ink);
  font-size: 15px;
}

.template-head span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.04em;
}

.template-text {
  width: 100%;
  min-height: 330px;
  display: block;
  padding: 20px;
  border: 0;
  resize: none;
  outline: none;
  background: var(--surface);
  color: var(--body);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.75;
}

.template-foot {
  border-top: 1px solid var(--line);
  font-size: 12px;
}

.copy-status {
  color: var(--muted);
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.28fr);
  gap: 24px;
  align-items: stretch;
}

.about-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.identity-card {
  background: var(--accent-soft);
}

.identity-mark {
  width: 56px;
  height: 56px;
  border-radius: 12px;
}

.about-card h3 {
  margin: 22px 0 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 28px;
  line-height: 1.2;
}

.about-card p,
.identity-card p {
  margin: 14px 0 0;
  color: var(--body);
  font-size: 15px;
  line-height: 1.78;
  text-wrap: pretty;
}

.identity-facts,
.about-list {
  display: grid;
  gap: 0;
  margin: 22px 0 0;
}

.identity-fact,
.about-list-row {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid rgba(23, 107, 84, 0.16);
  color: var(--body);
  font-size: 14px;
  line-height: 1.65;
}

.about-list-row {
  grid-template-columns: 96px minmax(0, 1fr);
  border-color: var(--line);
}

.identity-fact strong,
.about-list-row strong {
  color: var(--ink);
  font-size: 13px;
}

.footer {
  padding: 58px 0 28px;
  border-top: 0;
  background: var(--surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.82fr) minmax(150px, 0.42fr) minmax(360px, 1fr);
  gap: 48px;
  align-items: start;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 750;
  text-decoration: none;
}

.footer-logo-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid #b9d5c9;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-family: var(--serif);
}

.footer-brand p {
  margin: 16px 0 0;
  color: var(--body);
  font-size: 14px;
  line-height: 1.7;
}

.footer-made {
  margin-top: 18px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  line-height: 1.6;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-col h3 {
  margin: 0 0 16px;
  color: var(--ink);
  font-size: 14px;
}

.footer-links {
  display: grid;
  gap: 11px;
}

.footer-links a {
  color: var(--body);
  font-size: 14px;
  text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent-strong);
  outline: none;
}

.social-qr-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.social-qr-card {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.social-qr-card .qr-image {
  width: 100%;
  height: 132px;
  display: block;
  object-fit: contain;
  border: 0;
  background: #ffffff;
}

.social-qr-card h4 {
  margin: 10px 0 0;
  color: var(--ink);
  font-size: 13px;
}

.social-qr-card p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

.footer-copy {
  min-height: 36px;
  margin-top: 10px;
  padding: 0 10px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--body);
  font-size: 12px;
  cursor: pointer;
}

.qr-caption {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.6;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
}

.footer-legal a {
  color: inherit;
  text-decoration: none;
}

.footer-legal a:hover,
.footer-legal a:focus-visible {
  color: var(--accent-strong);
  outline: none;
}

.resource-dialog {
  width: min(660px, calc(100vw - 28px));
  max-height: min(760px, calc(100dvh - 28px));
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 24px 70px rgba(24, 33, 29, 0.18);
}

.resource-dialog::backdrop {
  background: rgba(24, 33, 29, 0.36);
  backdrop-filter: blur(4px);
}

.resource-dialog-head,
.resource-dialog-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  background: var(--surface-soft);
}

.resource-dialog-head {
  border-bottom: 1px solid var(--line);
}

.resource-dialog-head strong {
  font-size: 16px;
}

.dialog-close {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  flex: 0 0 44px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--body);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}

.dialog-close:hover,
.dialog-close:focus-visible {
  background: var(--accent-soft);
  color: var(--accent-strong);
  outline: none;
}

.resource-dialog-text {
  max-height: calc(100dvh - 190px);
  margin: 0;
  padding: 20px;
  overflow: auto;
  white-space: pre-wrap;
  color: var(--body);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.75;
}

.resource-dialog-foot {
  justify-content: flex-end;
  border-top: 1px solid var(--line);
}

:focus-visible {
  outline: 2px solid rgba(23, 107, 84, 0.42);
  outline-offset: 3px;
}

@media (max-width: 900px) {
  .hero-grid,
  .content-section-head,
  .section-head {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .hero-focus {
    max-width: 720px;
    padding: 24px 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

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

  .template-panel {
    position: static;
  }

  .footer-grid {
    grid-template-columns: 1fr 0.5fr 1fr;
    gap: 28px;
  }
}

@media (max-width: 760px) {
  #top,
  #essays,
  #toolbox,
  #about {
    scroll-margin-top: 64px;
  }

  .site-shell {
    width: min(100% - 28px, var(--max));
  }

  .nav {
    min-height: 56px;
    flex-direction: row;
    align-items: center;
    gap: 10px;
    padding: 0;
  }

  .brand-mark {
    width: 30px;
    height: 30px;
    flex-basis: 30px;
  }

  .brand-copy span {
    display: none;
  }

  .brand .brand-copy {
    display: grid;
  }

  .brand strong {
    font-size: 15px;
  }

  .nav-links {
    gap: 0;
    font-size: 13px;
  }

  .nav-links a {
    min-width: 44px;
    min-height: 44px;
    padding-inline: 8px;
  }

  .nav-links a[href="#top"] {
    display: none;
  }

  .nav-links .primary-link {
    border: 0;
    background: transparent;
  }

  .hero {
    padding: 48px 0 42px;
  }

  .hero-grid {
    gap: 32px;
  }

  .garden-label {
    font-size: 9px;
  }

  .garden-label::before {
    width: 20px;
    margin-right: 8px;
  }

  .hero h1 {
    margin-top: 16px;
    font-size: 36px;
    line-height: 1.12;
  }

  .hero-role {
    margin-top: 14px;
    font-size: 14px;
  }

  .hero-intro .lede {
    font-size: 16px;
    line-height: 1.75;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 22px;
  }

  .hero-actions .button {
    width: 100%;
    padding-inline: 10px;
  }

  .hero-actions .wechat-copy-button {
    grid-column: 1 / -1;
  }

  .hero-focus h2 {
    font-size: 21px;
  }

  .focus-link {
    min-height: 48px;
  }

  .section {
    padding: 56px 0;
  }

  .content-section-head,
  .section-head {
    gap: 14px;
    margin-bottom: 24px;
  }

  .content-section-head h2,
  .section-head h2,
  .about-card h2 {
    font-size: 30px;
  }

  .content-section-head p,
  .section-copy {
    font-size: 14px;
  }

  .article-filters {
    width: calc(100vw - 14px);
    margin-right: -14px;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 0 14px 8px 0;
    scrollbar-width: none;
  }

  .article-filters::-webkit-scrollbar {
    display: none;
  }

  .filter-button {
    min-height: 44px;
    flex: 0 0 auto;
  }

  .essay-row,
  .essay-row.is-featured {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 22px 0;
  }

  .article-index {
    padding-top: 0;
  }

  .essay-row h3,
  .essay-row.is-featured h3 {
    margin-top: 6px;
    font-size: 21px;
    line-height: 1.4;
  }

  .essay-row p {
    display: -webkit-box;
    overflow: hidden;
    font-size: 14px;
    line-height: 1.72;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
  }

  .page-button {
    width: 44px;
    height: 44px;
  }

  .resource-item {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 18px;
  }

  .resource-actions {
    justify-content: flex-start;
  }

  .resource-actions .button {
    min-height: 44px;
  }

  .template-panel {
    display: none;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .about-card {
    padding: 22px;
  }

  .identity-fact,
  .about-list-row {
    grid-template-columns: 78px minmax(0, 1fr);
  }

  .footer {
    padding-top: 46px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-links a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  .social-qr-grid {
    grid-template-columns: 1fr;
  }

  .social-qr-card {
    display: grid;
    grid-template-columns: 104px minmax(0, 1fr);
    column-gap: 14px;
    align-items: center;
  }

  .social-qr-card .qr-image {
    grid-row: 1 / span 4;
    width: 104px;
    height: 104px;
  }

  .social-qr-card h4,
  .social-qr-card p,
  .social-qr-card .footer-copy {
    grid-column: 2;
  }

  .social-qr-card h4 {
    margin-top: 0;
  }

  .footer-copy {
    min-height: 44px;
  }

  .qr-caption {
    display: none;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .footer-legal {
    flex-direction: column;
    gap: 8px;
  }
}

@media (max-width: 380px) {
  .brand-mark {
    display: none;
  }

  .nav-links a {
    padding-inline: 6px;
  }

  .hero-actions {
    grid-template-columns: 1fr;
  }

  .hero-actions .wechat-copy-button {
    grid-column: auto;
  }

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

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

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

/* Enterprise AI assistant */
#assistant {
  scroll-margin-top: 76px;
}

.assistant-section {
  background: #f1f5f7;
}

.assistant-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(480px, 1.28fr);
  gap: 64px;
  align-items: start;
}

.assistant-intro {
  padding-top: 10px;
}

.assistant-intro h2 {
  margin: 10px 0 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 38px;
  line-height: 1.2;
  letter-spacing: 0;
  text-wrap: balance;
}

.assistant-intro > p {
  margin: 18px 0 0;
  color: var(--body);
  font-size: 15px;
  line-height: 1.78;
  text-wrap: pretty;
}

.assistant-prompts {
  display: grid;
  margin-top: 26px;
  border-top: 1px solid var(--line-strong);
}

.assistant-prompts button {
  min-height: 52px;
  display: grid;
  align-items: center;
  padding: 10px 32px 10px 0;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font-size: 14px;
  font-weight: 620;
  line-height: 1.45;
  text-align: left;
  transition: color 160ms ease-out, padding-left 160ms ease-out;
}

.assistant-prompts button::after {
  position: absolute;
  right: 2px;
  color: var(--blue);
  content: "→";
}

.assistant-prompts button {
  position: relative;
}

.assistant-prompts button:hover,
.assistant-prompts button:focus-visible {
  padding-left: 4px;
  color: var(--blue);
  outline: none;
}

.assistant-intro .assistant-scope {
  margin-top: 18px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.assistant-tool {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
}

.assistant-toolbar {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-soft);
}

.assistant-toolbar > div:first-child {
  min-width: 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
}

.assistant-toolbar strong {
  color: var(--ink);
  font-size: 15px;
  line-height: 1.35;
}

.assistant-mode {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  line-height: 1.4;
}

.assistant-mode-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 7px;
  border-radius: 50%;
  background: var(--amber);
}

.assistant-mode.is-live .assistant-mode-dot {
  background: var(--accent);
}

.assistant-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.assistant-text-button {
  min-width: 44px;
  min-height: 44px;
  padding: 0 9px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--body);
  font-size: 12px;
  transition: background 160ms ease-out, color 160ms ease-out;
}

.assistant-text-button:hover,
.assistant-text-button:focus-visible {
  background: var(--accent-soft);
  color: var(--accent-strong);
  outline: none;
}

.chat-messages {
  height: 410px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 22px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--surface);
  scrollbar-color: var(--line-strong) transparent;
}

.chat-message {
  width: fit-content;
  max-width: min(86%, 620px);
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f5f7f6;
  color: var(--ink);
}

.chat-message.is-user {
  align-self: flex-end;
  border-color: var(--accent);
  background: var(--accent);
  color: #ffffff;
}

.chat-message.is-error {
  border-color: #d5a4a4;
  background: #fff5f5;
  color: #7b2f2f;
}

.chat-speaker {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.05em;
  line-height: 1.4;
  text-transform: uppercase;
}

.chat-message.is-user .chat-speaker {
  color: rgba(255, 255, 255, 0.7);
}

.chat-message p {
  margin: 0;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  font-size: 14px;
  line-height: 1.75;
}

.chat-message.is-streaming p::after {
  display: inline-block;
  width: 6px;
  height: 1em;
  margin-left: 3px;
  vertical-align: -2px;
  background: var(--accent);
  content: "";
  animation: chat-caret 800ms steps(2, end) infinite;
}

@keyframes chat-caret {
  50% {
    opacity: 0;
  }
}

.chat-sources {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 11px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.chat-sources a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 7px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--blue);
  font-size: 11px;
  line-height: 1.35;
  text-decoration: none;
}

.chat-sources a:hover,
.chat-sources a:focus-visible {
  border-color: var(--blue);
  outline: none;
}

.chat-composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: end;
  padding: 14px;
  border-top: 1px solid var(--line);
  background: var(--surface-soft);
}

.chat-composer textarea {
  width: 100%;
  min-height: 48px;
  max-height: 132px;
  display: block;
  padding: 12px 13px;
  overflow-y: auto;
  resize: none;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.55;
}

.chat-composer textarea::placeholder {
  color: var(--muted);
}

.chat-composer textarea:focus {
  border-color: var(--accent);
  outline: 2px solid rgba(23, 107, 84, 0.14);
  outline-offset: 0;
}

.chat-send {
  min-width: 64px;
  height: 48px;
  padding: 0 15px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #ffffff;
  font-size: 14px;
  font-weight: 650;
  transition: background 160ms ease-out, border-color 160ms ease-out;
}

.chat-send:hover,
.chat-send:focus-visible {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
  outline: none;
}

.chat-send:disabled,
.chat-composer textarea:disabled {
  cursor: not-allowed;
  opacity: 0.58;
}

.chat-foot {
  min-height: 37px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 7px 14px 9px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 10px;
  line-height: 1.5;
}

@media (max-width: 900px) {
  .assistant-layout {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .assistant-intro {
    max-width: 720px;
  }
}

@media (max-width: 760px) {
  #assistant {
    scroll-margin-top: 64px;
  }

  .assistant-intro h2 {
    font-size: 30px;
  }

  .assistant-intro > p {
    margin-top: 14px;
    font-size: 14px;
  }

  .assistant-prompts {
    margin-top: 22px;
  }

  .assistant-tool {
    width: calc(100% + 28px);
    margin-left: -14px;
    border-right: 0;
    border-left: 0;
    border-radius: 0;
  }

  .chat-messages {
    height: 390px;
    padding: 16px 14px;
  }

  .chat-message {
    max-width: 91%;
  }

  .chat-composer {
    padding: 12px 14px;
  }

  .chat-foot {
    align-items: flex-start;
  }
}

@media (max-width: 380px) {
  .assistant-toolbar {
    padding-inline: 12px;
  }

  .chat-composer {
    grid-template-columns: 1fr;
  }

  .chat-send {
    width: 100%;
  }
}