/* roulang page: index */
:root {
  color-scheme: light;
  --ink: #202a27;
  --muted: #687570;
  --soft: #edf2ef;
  --paper: #fff;
  --canvas: #f4f7f5;
  --line: #dce5e0;
  --green: #28745c;
  --green-dark: #205c49;
  --green-soft: #e4f1eb;
  --coral: #c95f4d;
  --radius: 8px;
  --shadow: 0 8px 24px rgba(29, 54, 44, .07);
  --container: 1160px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--green-dark); }
button, input { font: inherit; }
button, a, input { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, input:focus-visible {
  outline: 3px solid rgba(40, 116, 92, .3);
  outline-offset: 3px;
}
img { display: block; max-width: 100%; }
.container { width: min(var(--container), calc(100% - 48px)); margin-inline: auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  font-size: 17px;
  font-weight: 750;
  line-height: 1.25;
}
.brand-mark {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--green);
  border-radius: 7px;
  font-size: 14px;
  font-weight: 800;
}
.brand small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0;
}
.site-nav { display: flex; align-items: center; gap: 8px; }
.site-nav a {
  padding: 9px 13px;
  border-radius: 6px;
  color: #46534e;
  font-size: 14px;
  font-weight: 650;
  transition: background .18s ease, color .18s ease;
}
.site-nav a:hover, .site-nav a[aria-current="page"] {
  color: var(--green-dark);
  background: var(--green-soft);
}
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-size: 20px;
}
main { overflow: hidden; }
.hero {
  padding: 65px 0 54px;
  background: #eaf1ed;
  border-bottom: 1px solid #dce7e1;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(290px, .75fr);
  align-items: center;
  gap: 56px;
}
.eyebrow {
  margin: 0 0 13px;
  color: var(--green-dark);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0;
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 730px;
  margin-bottom: 17px;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.22;
  letter-spacing: 0;
}
.hero-copy {
  max-width: 650px;
  margin-bottom: 24px;
  color: #53615b;
  font-size: 17px;
}
.search-form {
  display: flex;
  max-width: 610px;
  padding: 5px;
  background: #fff;
  border: 1px solid #d5e1da;
  border-radius: 7px;
  box-shadow: 0 5px 15px rgba(29, 54, 44, .06);
}
.search-form input {
  width: 100%;
  min-width: 0;
  padding: 12px 14px;
  border: 0;
  outline: 0;
  color: var(--ink);
  background: transparent;
}
.search-form input:focus-visible { outline: 0; }
.search-form button, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--green);
  border-radius: 5px;
  color: #fff;
  background: var(--green);
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease, transform .18s ease;
}
.search-form button:hover, .button:hover {
  color: #fff;
  background: var(--green-dark);
  border-color: var(--green-dark);
  transform: translateY(-1px);
}
.button-secondary {
  color: var(--green-dark);
  background: #fff;
  border-color: #b9cec3;
}
.button-secondary:hover { color: #fff; }
.hero-topics { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.topic-chip {
  padding: 5px 10px;
  border: 1px solid #cfddd5;
  border-radius: 4px;
  color: #52615a;
  background: rgba(255,255,255,.58);
  font-size: 12px;
}
.hero-note {
  padding: 24px 25px;
  border-left: 3px solid var(--coral);
  background: rgba(255,255,255,.7);
}
.hero-note h2 { margin-bottom: 12px; font-size: 18px; }
.hero-note p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
.hero-note .note-label {
  display: block;
  margin-bottom: 10px;
  color: var(--coral);
  font-size: 11px;
  font-weight: 800;
}
.section { padding: 58px 0; }
.section-white { background: var(--paper); }
.section-soft { background: var(--canvas); }
.section-line { border-bottom: 1px solid var(--line); }
.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 25px;
}
.section-heading h2 { margin-bottom: 5px; font-size: 25px; line-height: 1.3; }
.section-heading p { margin: 0; color: var(--muted); font-size: 14px; }
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--green-dark);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.content-card {
  min-width: 0;
  padding: 19px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.content-card:hover {
  border-color: #b8d0c3;
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-bottom: 11px;
  color: var(--muted);
  font-size: 12px;
}
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 3px;
  color: var(--green-dark);
  background: var(--green-soft);
  font-size: 11px;
  font-weight: 700;
}
.card-title { margin-bottom: 8px; font-size: 17px; line-height: 1.45; }
.card-title a:hover { color: var(--green-dark); }
.card-summary { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.empty-state {
  padding: 28px;
  border: 1px dashed #bdcec4;
  color: var(--muted);
  background: #fbfcfb;
  text-align: center;
}
.update-layout {
  display: grid;
  grid-template-columns: .75fr 1.25fr;
  gap: 52px;
  align-items: start;
}
.update-intro { max-width: 340px; }
.update-intro h2 { margin-bottom: 11px; font-size: 26px; }
.update-intro p { color: var(--muted); }
.update-list { border-top: 1px solid var(--line); }
.update-row {
  display: grid;
  grid-template-columns: 100px minmax(0, 1fr);
  gap: 18px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}
.update-date { color: var(--muted); font-size: 12px; }
.update-row h3 { margin: 0 0 4px; font-size: 15px; line-height: 1.5; }
.update-row p { margin: 0; color: var(--muted); font-size: 13px; }
.index-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}
.index-group h3 { margin-bottom: 16px; font-size: 18px; }
.category-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.category-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: #fff;
  font-size: 14px;
  font-weight: 650;
  transition: border-color .18s ease, background .18s ease;
}
.category-link span:last-child { color: var(--green); }
.category-link:hover { border-color: #afcbbd; background: #f5faf7; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
.tag-cloud a {
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: #46534e;
  background: #fff;
  font-size: 13px;
  transition: background .18s ease, color .18s ease;
}
.tag-cloud a:hover { color: var(--green-dark); background: var(--green-soft); }
.year-strip {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border: 1px solid var(--line);
  background: #fff;
}
.year-item {
  padding: 17px 10px;
  border-right: 1px solid var(--line);
  color: #54615b;
  text-align: center;
  font-weight: 700;
}
.year-item:last-child { border-right: 0; }
.year-item:hover, .year-item[aria-current="true"] { color: var(--green-dark); background: var(--green-soft); }
.feature-band {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  align-items: center;
  gap: 30px;
  padding: 30px 32px;
  color: #fff;
  background: #28634f;
}
.feature-band h2 { max-width: 520px; margin-bottom: 10px; font-size: 25px; line-height: 1.35; }
.feature-band p { max-width: 560px; margin: 0; color: #e2eee8; font-size: 14px; }
.feature-band .button { justify-self: end; color: var(--green-dark); background: #fff; border-color: #fff; }
.feature-band .button:hover { background: #e9f2ed; color: var(--green-dark); }
.topic-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.topic-item {
  min-height: 94px;
  padding: 16px;
  border-top: 2px solid var(--green);
  background: #fff;
}
.topic-item strong { display: block; margin-bottom: 5px; font-size: 15px; }
.topic-item span { color: var(--muted); font-size: 12px; }
.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  counter-reset: item;
}
.step {
  position: relative;
  padding-top: 42px;
  border-top: 1px solid #cbd8d1;
  counter-increment: item;
}
.step::before {
  content: "0" counter(item);
  position: absolute;
  top: 10px;
  left: 0;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
}
.step h3 { margin-bottom: 7px; font-size: 16px; }
.step p { margin: 0; color: var(--muted); font-size: 13px; }
.field-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.field {
  min-height: 102px;
  padding: 16px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.field span { display: block; margin-bottom: 7px; color: var(--muted); font-size: 12px; }
.field strong { font-size: 15px; }
.guide-layout {
  display: grid;
  grid-template-columns: .7fr 1.3fr;
  gap: 55px;
}
.guide-layout h2 { max-width: 320px; font-size: 25px; line-height: 1.35; }
.guide-list { list-style: none; padding: 0; margin: 0; }
.guide-list li {
  display: flex;
  gap: 13px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.guide-list li:first-child { border-top: 1px solid var(--line); }
.guide-list b { color: var(--green); font-size: 13px; }
.guide-list span { color: #53615b; font-size: 14px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { padding: 16px 0; border-bottom: 1px solid var(--line); }
.faq-list summary {
  position: relative;
  padding-right: 30px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 3px; color: var(--green); font-size: 20px; line-height: 1; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { max-width: 850px; margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.closing-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}
.closing-band h2 { margin: 0; font-size: 20px; }
.site-footer { padding: 35px 0 22px; background: #202a27; color: #e9efec; }
.footer-top { display: flex; justify-content: space-between; gap: 36px; padding-bottom: 25px; }
.footer-brand { max-width: 350px; }
.footer-brand .brand { color: #fff; }
.footer-brand p { margin: 14px 0 0; color: #b8c5bf; font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; align-content: start; gap: 9px 22px; }
.footer-links a { color: #d2ddd7; font-size: 13px; }
.footer-links a:hover { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-top: 17px;
  border-top: 1px solid rgba(255,255,255,.15);
  color: #aab8b1;
  font-size: 12px;
}
@media (max-width: 1024px) {
  .hero-grid { gap: 32px; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .topic-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .field-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .index-layout { gap: 35px; }
}
@media (max-width: 768px) {
  .container { width: min(100% - 36px, var(--container)); }
  .header-inner { min-height: 66px; flex-wrap: wrap; gap: 10px; }
  .brand { font-size: 15px; }
  .menu-toggle { display: inline-grid; place-items: center; }
  .site-nav {
    display: none;
    width: 100%;
    padding: 0 0 14px;
    flex-direction: column;
    align-items: stretch;
    gap: 3px;
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 10px 12px; }
  .hero { padding: 45px 0 40px; }
  .hero-grid { grid-template-columns: 1fr; gap: 25px; }
  h1 { font-size: 36px; }
  .hero-note { max-width: 650px; }
  .section { padding: 44px 0; }
  .update-layout, .guide-layout { grid-template-columns: 1fr; gap: 22px; }
  .update-intro { max-width: 620px; }
  .index-layout { grid-template-columns: 1fr; gap: 32px; }
  .feature-band { grid-template-columns: 1fr; padding: 25px; }
  .feature-band .button { justify-self: start; }
  .steps { gap: 18px; }
  .year-strip { grid-template-columns: repeat(3, 1fr); }
  .year-item:nth-child(3) { border-right: 0; }
  .year-item:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
}
@media (max-width: 520px) {
  .container { width: calc(100% - 30px); }
  .hero { padding-top: 36px; }
  h1 { font-size: 31px; }
  .hero-copy { font-size: 15px; }
  .search-form { flex-wrap: wrap; }
  .search-form input { flex: 1 1 100%; padding: 10px 11px; }
  .search-form button { width: 100%; }
  .section-heading { align-items: start; flex-direction: column; gap: 10px; }
  .section-heading h2 { font-size: 22px; }
  .feature-grid, .topic-grid, .steps { grid-template-columns: 1fr; }
  .category-links { grid-template-columns: 1fr; }
  .year-item { padding: 13px 7px; font-size: 14px; }
  .update-row { grid-template-columns: 1fr; gap: 4px; }
  .field-grid { grid-template-columns: 1fr 1fr; }
  .field { min-height: 92px; padding: 13px; }
  .feature-band { padding: 22px 18px; }
  .feature-band h2 { font-size: 21px; }
  .closing-band, .footer-top, .footer-bottom { align-items: flex-start; flex-direction: column; }
  .footer-links { gap: 10px 17px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}

/* roulang page: article */
:root {
      color-scheme: light;
      --ink: #202a27;
      --muted: #687570;
      --soft: #edf2ef;
      --paper: #fff;
      --canvas: #f4f7f5;
      --line: #dce5e0;
      --green: #28745c;
      --green-dark: #205c49;
      --green-soft: #e4f1eb;
      --coral: #c95f4d;
      --radius: 8px;
      --shadow: 0 8px 24px rgba(29, 54, 44, .07);
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--canvas);
      font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    a { color: inherit; text-decoration: none; }
    a:hover { color: var(--green-dark); }
    button, input { font: inherit; }
    button, a, input { -webkit-tap-highlight-color: transparent; }
    button:focus-visible, a:focus-visible, input:focus-visible {
      outline: 3px solid rgba(40, 116, 92, .3);
      outline-offset: 3px;
    }
    img { display: block; max-width: 100%; }
    .container { width: min(var(--container), calc(100% - 48px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255,255,255,.96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .header-inner {
      min-height: 74px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 11px;
      min-width: 0;
      font-size: 17px;
      font-weight: 750;
      line-height: 1.25;
    }
    .brand-mark {
      width: 36px;
      height: 36px;
      flex: 0 0 36px;
      display: grid;
      place-items: center;
      color: #fff;
      background: var(--green);
      border-radius: 7px;
      font-size: 14px;
      font-weight: 800;
    }
    .brand small {
      display: block;
      margin-top: 3px;
      color: var(--muted);
      font-size: 10px;
      font-weight: 650;
    }
    .site-nav { display: flex; align-items: center; gap: 8px; }
    .site-nav a {
      padding: 9px 13px;
      border-radius: 6px;
      color: #46534e;
      font-size: 14px;
      font-weight: 650;
      transition: background .18s ease, color .18s ease;
    }
    .site-nav a:hover, .site-nav a[aria-current="page"] {
      color: var(--green-dark);
      background: var(--green-soft);
    }
    .menu-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border: 1px solid var(--line);
      border-radius: 6px;
      background: #fff;
      color: var(--ink);
      cursor: pointer;
      font-size: 20px;
    }
    main { overflow: hidden; }
    .container-narrow { width: min(820px, calc(100% - 48px)); margin-inline: auto; }
    .article-head {
      padding: 34px 0 36px;
      background: #eaf1ed;
      border-bottom: 1px solid #dce7e1;
    }
    .breadcrumbs {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 9px;
      margin: 0 0 25px;
      color: var(--muted);
      font-size: 13px;
    }
    .breadcrumbs a { color: var(--green-dark); font-weight: 650; }
    .breadcrumbs .separator { color: #98a69f; }
    .article-label {
      margin: 0 0 10px;
      color: var(--green-dark);
      font-size: 12px;
      font-weight: 750;
    }
    .article-title {
      max-width: 780px;
      margin: 0 0 16px;
      font-size: clamp(30px, 4vw, 42px);
      font-weight: 780;
      line-height: 1.35;
      overflow-wrap: anywhere;
    }
    .article-description {
      max-width: 730px;
      margin: 0;
      color: #53615b;
      font-size: 16px;
    }
    .article-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 20px;
      margin-top: 20px;
      color: var(--muted);
      font-size: 13px;
    }
    .article-meta span { display: inline-flex; align-items: center; gap: 7px; }
    .meta-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--coral); }
    .section { padding: 42px 0; }
    .section-white { background: var(--paper); }
    .section-soft { background: var(--canvas); }
    .section-line { border-bottom: 1px solid var(--line); }
    .article-body {
      color: #35413c;
      font-size: 16px;
      line-height: 1.9;
      overflow-wrap: anywhere;
    }
    .article-body > :first-child { margin-top: 0; }
    .article-body > :last-child { margin-bottom: 0; }
    .article-body h2, .article-body h3, .article-body h4 {
      margin: 34px 0 14px;
      color: var(--ink);
      font-weight: 750;
      line-height: 1.45;
    }
    .article-body h2 { padding-bottom: 10px; border-bottom: 1px solid var(--line); font-size: 25px; }
    .article-body h3 { font-size: 20px; }
    .article-body h4 { font-size: 17px; }
    .article-body p { margin: 0 0 20px; }
    .article-body ul, .article-body ol { margin: 0 0 22px; padding-left: 1.45em; }
    .article-body li { margin: 7px 0; padding-left: 4px; }
    .article-body blockquote {
      margin: 24px 0;
      padding: 16px 20px;
      border-left: 3px solid var(--coral);
      background: var(--canvas);
      color: #53615b;
    }
    .article-body img { height: auto; margin: 24px auto; border-radius: 5px; }
    .article-body figure { margin: 24px 0; }
    .article-body figcaption { margin-top: 8px; color: var(--muted); font-size: 13px; text-align: center; }
    .article-body table { width: 100%; margin: 22px 0; border-collapse: collapse; font-size: 14px; }
    .article-body th, .article-body td { padding: 11px 13px; border: 1px solid var(--line); text-align: left; }
    .article-body th { background: var(--soft); color: var(--ink); }
    .article-body a { color: var(--green-dark); text-decoration: underline; text-underline-offset: 3px; }
    .article-content-section { padding-top: 38px; padding-bottom: 55px; }
    .article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 50px; align-items: start; }
    .reading-note {
      position: sticky;
      top: 98px;
      padding: 18px 0 18px 18px;
      border-left: 2px solid var(--line);
    }
    .reading-note strong { display: block; margin-bottom: 8px; font-size: 14px; }
    .reading-note p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
    .article-end {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding-top: 22px;
      border-top: 1px solid var(--line);
    }
    .article-end p { margin: 0; color: var(--muted); font-size: 14px; }
    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 42px;
      padding: 9px 15px;
      border: 1px solid var(--green);
      border-radius: 5px;
      color: #fff;
      background: var(--green);
      font-size: 14px;
      font-weight: 700;
      transition: background .18s ease, border-color .18s ease, transform .18s ease;
    }
    .button:hover { color: #fff; background: var(--green-dark); border-color: var(--green-dark); transform: translateY(-1px); }
    .button-secondary { color: var(--green-dark); background: #fff; border-color: #b9cec3; }
    .button-secondary:hover { color: #fff; }
    .not-found {
      padding: 56px 0 64px;
      text-align: center;
    }
    .not-found-mark {
      width: 56px;
      height: 56px;
      display: grid;
      place-items: center;
      margin: 0 auto 18px;
      border-radius: 50%;
      color: var(--green-dark);
      background: var(--green-soft);
      font-size: 24px;
      font-weight: 700;
    }
    .not-found h1 { margin: 0 0 10px; font-size: 28px; }
    .not-found p { margin: 0 0 22px; color: var(--muted); }
    .site-footer {
      padding: 38px 0 20px;
      color: #eaf1ed;
      background: #202a27;
    }
    .footer-top {
      display: flex;
      justify-content: space-between;
      gap: 48px;
      padding-bottom: 28px;
    }
    .footer-brand { max-width: 400px; }
    .footer-brand .brand { color: #fff; }
    .footer-brand .brand-mark { color: var(--green-dark); background: #d8ebe1; }
    .footer-brand p { margin: 15px 0 0; color: #b8c5bf; font-size: 13px; }
    .footer-links {
      display: flex;
      flex-wrap: wrap;
      align-content: flex-start;
      gap: 10px 22px;
      max-width: 510px;
    }
    .footer-links a { color: #d9e2dd; font-size: 13px; }
    .footer-links a:hover { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
    .footer-bottom {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      padding-top: 17px;
      border-top: 1px solid rgba(255,255,255,.15);
      color: #b8c5bf;
      font-size: 12px;
    }
    @media (max-width: 1024px) {
      .article-layout { grid-template-columns: minmax(0, 1fr) 190px; gap: 34px; }
    }
    @media (max-width: 768px) {
      .container, .container-narrow { width: min(100% - 36px, var(--container)); }
      .header-inner { min-height: 68px; gap: 14px; }
      .brand { font-size: 14px; }
      .brand-mark { width: 34px; height: 34px; flex-basis: 34px; }
      .menu-toggle { display: grid; place-items: center; flex: 0 0 42px; }
      .site-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        padding: 10px 18px 15px;
        border-bottom: 1px solid var(--line);
        background: #fff;
      }
      .site-nav.is-open { display: flex; flex-direction: column; align-items: stretch; }
      .site-nav a { padding: 11px 13px; }
      .article-head { padding: 26px 0 30px; }
      .article-title { font-size: 32px; }
      .article-layout { display: block; }
      .reading-note { display: none; }
      .section { padding: 34px 0; }
      .article-content-section { padding-top: 30px; padding-bottom: 40px; }
      .footer-top { flex-direction: column; gap: 25px; }
    }
    @media (max-width: 520px) {
      .container, .container-narrow { width: calc(100% - 32px); }
      .brand { max-width: calc(100% - 58px); font-size: 13px; }
      .brand small { font-size: 9px; }
      .article-title { font-size: 28px; }
      .article-description { font-size: 15px; }
      .article-meta { gap: 8px 14px; }
      .article-body { font-size: 15px; }
      .article-body h2 { font-size: 22px; }
      .article-body h3 { font-size: 18px; }
      .article-body table { display: block; overflow-x: auto; white-space: nowrap; }
      .article-end { align-items: flex-start; flex-direction: column; }
      .footer-bottom { flex-direction: column; gap: 6px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
    }

/* roulang page: category1 */
:root{color-scheme:light;--ink:#202a27;--muted:#687570;--soft:#edf2ef;--paper:#fff;--canvas:#f4f7f5;--line:#dce5e0;--green:#28745c;--green-dark:#205c49;--green-soft:#e4f1eb;--coral:#c95f4d;--radius:8px;--shadow:0 8px 24px rgba(29,54,44,.07);--container:1160px}
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--canvas);font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}a:hover{color:var(--green-dark)}img{display:block;max-width:100%}button,input{font:inherit}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid rgba(40,116,92,.3);outline-offset:3px}.container{width:min(var(--container),calc(100% - 48px));margin-inline:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.header-inner{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:inline-flex;align-items:center;gap:11px;min-width:0;font-size:17px;font-weight:750;line-height:1.25}.brand-mark{width:36px;height:36px;flex:0 0 36px;display:grid;place-items:center;color:#fff;background:var(--green);border-radius:7px;font-size:14px;font-weight:800}.brand small{display:block;margin-top:3px;color:var(--muted);font-size:10px;font-weight:650}.site-nav{display:flex;align-items:center;gap:8px}.site-nav a{padding:9px 13px;border-radius:6px;color:#46534e;font-size:14px;font-weight:650;transition:.18s}.site-nav a:hover,.site-nav a[aria-current=page]{color:var(--green-dark);background:var(--green-soft)}.menu-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:6px;background:#fff;cursor:pointer}
    main{overflow:hidden}.hero{padding:60px 0 48px;background:#eaf1ed;border-bottom:1px solid #dce7e1}.breadcrumb{margin-bottom:18px;color:var(--muted);font-size:13px}.breadcrumb a{color:var(--green-dark)}.hero-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);gap:54px;align-items:center}.eyebrow{margin:0 0 12px;color:var(--green-dark);font-size:12px;font-weight:750}.hero h1{margin:0 0 16px;font-size:clamp(32px,4vw,52px);line-height:1.18;letter-spacing:0}.hero-copy{max-width:700px;margin:0 0 24px;color:#53615b;font-size:17px}.hero-note{padding:24px;border-left:3px solid var(--coral);background:rgba(255,255,255,.72)}.hero-note strong{display:block;margin-bottom:10px;color:var(--coral);font-size:12px}.hero-note p{margin:0;color:var(--muted);font-size:14px}.section{padding:58px 0}.section-white{background:var(--paper)}.section-line{border-bottom:1px solid var(--line)}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:24px}.section-heading h2{margin:0 0 5px;font-size:25px;line-height:1.3}.section-heading p{margin:0;color:var(--muted);font-size:14px}.text-link{color:var(--green-dark);font-size:14px;font-weight:700;white-space:nowrap}.text-link:hover{text-decoration:underline;text-underline-offset:4px}
    .filter-bar{display:flex;flex-wrap:wrap;gap:10px;padding:16px;margin-bottom:24px;border:1px solid var(--line);background:#fff;border-radius:var(--radius)}.filter-bar select{min-width:150px;padding:9px 12px;border:1px solid var(--line);border-radius:5px;color:var(--ink);background:#fff}.filter-state{display:inline-flex;align-items:center;padding:8px 12px;color:var(--green-dark);background:var(--green-soft);font-size:13px}.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.content-card{min-width:0;padding:19px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;transition:.18s}.content-card:hover{border-color:#b8d0c3;box-shadow:var(--shadow);transform:translateY(-2px)}.card-meta{display:flex;flex-wrap:wrap;gap:8px 12px;margin-bottom:10px;color:var(--muted);font-size:12px}.badge{display:inline-flex;padding:3px 8px;border-radius:3px;color:var(--green-dark);background:var(--green-soft);font-size:11px;font-weight:700}.card-title{margin:0 0 8px;font-size:17px;line-height:1.45}.card-summary{margin:0;color:var(--muted);font-size:13px}.index-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.index-item{display:flex;justify-content:space-between;gap:18px;padding:16px 18px;border-bottom:1px solid var(--line);background:#fff}.index-item span{color:var(--muted);font-size:13px}.topic-cloud{display:flex;flex-wrap:wrap;gap:9px}.topic-cloud a{padding:8px 12px;border:1px solid var(--line);border-radius:5px;background:#fff;color:#46534e;font-size:14px;transition:.18s}.topic-cloud a:hover{border-color:#a9c8b8;background:var(--green-soft);color:var(--green-dark)}.guide-layout{display:grid;grid-template-columns:1fr 1fr;gap:18px}.guide-box{padding:24px;background:#fff;border-left:3px solid var(--green)}.guide-box h3{margin:0 0 8px;font-size:18px}.guide-box p{margin:0;color:var(--muted);font-size:14px}.faq-list{border-top:1px solid var(--line)}details{padding:17px 0;border-bottom:1px solid var(--line)}summary{cursor:pointer;font-weight:700}details p{margin:10px 0 0;color:var(--muted);font-size:14px}.cta{padding:38px 0;background:var(--green);color:#fff}.cta-inner{display:flex;justify-content:space-between;align-items:center;gap:24px}.cta h2{margin:0 0 6px;font-size:25px}.cta p{margin:0;color:#d9ebe2}.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 18px;border:1px solid var(--green);border-radius:5px;color:#fff;background:var(--green);font-weight:700;transition:.18s}.button:hover{color:#fff;background:var(--green-dark);transform:translateY(-1px)}.button-light{color:var(--green-dark);background:#fff;border-color:#fff}.button-light:hover{color:var(--green-dark);background:var(--green-soft)}.site-footer{padding:38px 0 22px;color:#d7e2dc;background:#202a27}.footer-top{display:flex;justify-content:space-between;gap:36px}.footer-brand .brand{color:#fff}.footer-brand p{margin:16px 0 0;color:#b8c5bf;font-size:13px}.footer-links{display:flex;flex-wrap:wrap;gap:10px 20px;align-content:flex-start}.footer-links a{color:#d7e2dc;font-size:13px}.footer-links a:hover{color:#fff}.footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:30px;padding-top:18px;border-top:1px solid #3c4843;color:#9eada6;font-size:12px}
    @media(max-width:768px){.container{width:min(var(--container),calc(100% - 32px))}.header-inner{min-height:66px}.menu-toggle{display:block}.site-nav{display:none;position:absolute;top:67px;left:16px;right:16px;padding:8px;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}.site-nav.is-open{display:flex}.site-nav a{padding:12px}.hero{padding:42px 0 38px}.hero-grid,.guide-layout{grid-template-columns:1fr;gap:28px}.hero h1{font-size:34px}.section{padding:42px 0}.section-heading{align-items:flex-start;flex-direction:column;gap:8px}.feature-grid,.index-list{grid-template-columns:1fr}.cta-inner,.footer-top,.footer-bottom{align-items:flex-start;flex-direction:column}.footer-bottom{gap:6px}}
    @media(max-width:520px){.search-form{display:block;background:transparent;border:0;box-shadow:none}.search-form input{width:100%;margin-bottom:8px;padding:12px;border:1px solid var(--line);background:#fff;border-radius:5px}.search-form button{width:100%}.filter-bar select{width:100%}.index-item{display:block}.index-item span{display:block;margin-top:5px}}