/* roulang page: index */
:root {
  --color-bg: #F6F3ED;
  --color-surface: #FFFFFF;
  --color-primary: #18544F;
  --color-primary-deep: #0D3A37;
  --color-primary-ink: #0A2B29;
  --color-accent: #BF623D;
  --color-accent-hover: #A24D2C;
  --color-text: #173331;
  --color-text-secondary: #5A6B68;
  --color-border: #E5DFD1;
  --color-border-strong: #C9C0AE;
  --color-success: #2E7D62;
  --color-error: #B44038;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --shadow-card: 0 1px 2px rgba(23,51,49,.04), 0 8px 20px rgba(23,51,49,.05);
  --shadow-hover: 0 12px 28px rgba(23,51,49,.10);
  --container-width: 1200px;
  --header-h: 72px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 1.0625rem;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 72px;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input { font-family: inherit; }
h1, h2, h3, h4 { line-height: 1.3; font-weight: 700; }
::selection { background: rgba(24,84,79,.18); }
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 575px) {
  .container { padding: 0 16px; }
}
.section { padding: var(--space-4xl) 0; }
.section-alt { background: var(--color-surface); }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.eyebrow::before {
  content: "";
  width: 16px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}
.section-title {
  font-size: clamp(1.5rem, 3.2vw, 2.25rem);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 12px;
}
.section-desc { color: var(--color-text-secondary); max-width: 680px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(246, 243, 237, .88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: background .3s, border-color .3s, box-shadow .3s;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, .92);
  border-bottom-color: var(--color-border);
  box-shadow: 0 4px 16px rgba(23,51,49,.06);
}
.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--color-primary-deep);
}
.brand-mark {
  display: inline-block;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(24,84,79,.24);
}
.brand-text {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -.01em;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0 auto;
}
.nav-item {
  position: relative;
  display: inline-block;
  padding: 8px 14px;
  color: var(--color-text);
  font-weight: 600;
  font-size: .9375rem;
  border-radius: 8px;
  transition: color .2s;
}
.nav-item::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}
.nav-item:hover { color: var(--color-primary); }
.nav-item:hover::after,
.nav-item.active::after { transform: scaleX(1); }
.nav-item.active { color: var(--color-primary); font-weight: 700; }
.nav-cta {
  flex-shrink: 0;
  background: var(--color-accent);
  color: #fff;
  height: 42px;
  line-height: 42px;
  padding: 0 22px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: .9375rem;
  transition: background .2s, transform .2s, box-shadow .2s;
}
.nav-cta:hover { background: var(--color-accent-hover); }
.mobile-menu-toggle { display: none; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1;
  padding: 0 28px;
  height: 48px;
  border: 0;
  cursor: pointer;
  transition: background .2s, transform .2s, box-shadow .2s, border-color .2s;
}
.btn:focus-visible { outline: 3px solid rgba(24,84,79,.38); outline-offset: 2px; }
.btn-accent { background: var(--color-accent); color: #fff; box-shadow: 0 6px 16px rgba(191,98,61,.24); }
.btn-accent:hover { background: var(--color-accent-hover); transform: translateY(-2px); box-shadow: 0 10px 22px rgba(191,98,61,.28); }
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn-outline:hover { background: rgba(24,84,79,.08); }
.btn-white-outline { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.7); }
.btn-white-outline:hover { background: rgba(255,255,255,.1); }
.btn-block { width: 100%; }

/* Hero */
.hero {
  min-height: 92vh;
  max-height: 96vh;
  position: relative;
  display: flex;
  align-items: center;
  background: var(--color-primary-ink);
  overflow: hidden;
  color: #fff;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: .36;
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(10,43,41,.92) 20%, rgba(13,58,55,.4) 60%, rgba(13,58,55,.12) 100%);
}
.hero-grid-lines {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}
.hero-content-wrap {
  position: relative;
  z-index: 2;
  padding: 72px 0;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 64px;
  align-items: center;
}
.hero-eyebrow {
  color: #C9D6D1;
  font-size: .875rem;
  letter-spacing: .06em;
  margin-bottom: 16px;
  display: inline-block;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.14);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
}
.hero h1 {
  font-size: clamp(2.1rem, 4.8vw, 3.5rem);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -.02em;
  margin: 0 0 22px;
  max-width: 16ch;
}
.hero h1 .underline-accent {
  background: linear-gradient(120deg, transparent 62%, rgba(191,98,61,.42) 0);
}
.hero-sub {
  font-size: 1.125rem;
  color: rgba(255,255,255,.86);
  max-width: 42rem;
  line-height: 1.8;
  margin-bottom: 32px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-note { margin-top: 16px; font-size: .8125rem; color: rgba(255,255,255,.55); }
.hero-visual {
  display: flex;
  justify-content: flex-end;
}
.hero-device {
  width: 100%;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  overflow: hidden;
  box-shadow: 0 26px 60px rgba(0,0,0,.35);
  padding: 12px;
  max-width: 480px;
}
.device-top {
  display: flex;
  gap: 6px;
  align-items: center;
  padding: 4px 6px 10px;
}
.device-dot { width: 9px; height: 9px; border-radius: 50%; }
.dev-dot-1 { background: #E9B3A0; }
.dev-dot-2 { background: #DED3B3; }
.dev-dot-3 { background: #B5CBBB; }
.device-screen {
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
}
.device-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-metrics { margin-top: 48px; display: flex; gap: 40px; flex-wrap: wrap; }
.hero-metric .m-value { font-size: 1.75rem; font-weight: 800; color: #fff; }
.hero-metric .m-label { font-size: .8125rem; color: rgba(255,255,255,.6); }

/* Feature Carousel / Capabilities */
.features-section { background: var(--color-bg); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 36px; flex-wrap: wrap; }
.carousel-controls { display: flex; gap: 10px; }
.carousel-btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--color-border-strong);
  background: #fff;
  color: var(--color-primary);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s, border-color .2s, transform .2s;
  min-width: 42px;
}
.carousel-btn:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.feature-slider-wrap { overflow: hidden; margin: 0 -12px; padding: 8px 12px 24px; }
.feature-slider {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: calc((100% - 24px) / 3);
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
}
.feature-slider::-webkit-scrollbar { display: none; }
.feature-card {
  scroll-snap-align: start;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 14px 14px 24px;
  box-shadow: var(--shadow-card);
  transition: transform .3s, box-shadow .3s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.fc-browser-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #F7F6F1;
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 10px;
}
.fc-browser-bar span { width: 8px; height: 8px; border-radius: 50%; background: #C9C0AE; }
.fc-browser-bar span:first-child { background: #E9B3A0; }
.fc-browser-bar span:nth-child(2) { background: #DED3B3; }
.fc-browser-bar span:nth-child(3) { background: #B5CBBB; }
.fc-preview {
  border-radius: 10px;
  overflow: hidden;
  aspect-ratio: 4/3;
  margin-bottom: 20px;
  background: #f4f2ed;
}
.fc-preview img { width: 100%; height: 100%; object-fit: cover; }
.feature-card h3 { font-size: 1.15rem; font-weight: 700; margin: 0 6px 6px; color: var(--color-text); }
.feature-card p { font-size: .9rem; color: var(--color-text-secondary); margin: 0 6px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* Requirements */
.req-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 36px; }
.req-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  transition: transform .25s, box-shadow .25s;
  height: 100%;
}
.req-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.req-icon {
  width: 48px;
  height: 48px;
  border-radius: 13px;
  background: rgba(24,84,79,.09);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: 18px;
}
.req-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 14px; color: var(--color-text); }
.req-list { list-style: none; }
.req-list li {
  display: flex;
  gap: 10px;
  padding: 6px 0;
  font-size: .9rem;
  color: var(--color-text-secondary);
  border-bottom: 1px dashed #EEE9DF;
  line-height: 1.6;
}
.req-list li:last-child { border-bottom: 0; }
.req-list .r-label { color: var(--color-primary); font-weight: 600; flex-shrink: 0; min-width: 62px; font-size: .85rem; }

/* News CMS */
.news-section { background: var(--color-bg); }
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 32px; }
.news-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 26px 24px;
  box-shadow: var(--shadow-card);
  transition: transform .25s, box-shadow .25s;
  height: 100%;
  color: var(--color-text);
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--color-border-strong); }
.news-badge {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  font-size: .8125rem;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(24,84,79,.08);
  border-radius: var(--radius-pill);
  padding: 4px 14px;
  margin-bottom: 14px;
  line-height: 1.4;
}
.news-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-excerpt {
  font-size: .9rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
  margin-bottom: 18px;
}
.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid #F1EDE5;
  padding-top: 14px;
}
.news-date { font-size: .8125rem; color: var(--color-text-secondary); }
.news-more-link {
  font-size: .875rem;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.news-more-link:hover { color: var(--color-accent); }
.empty-state {
  grid-column: 1 / -1;
  background: #fff;
  border: 1px dashed var(--color-border-strong);
  border-radius: 16px;
  padding: 70px 20px;
  text-align: center;
  color: var(--color-text-secondary);
  min-height: 240px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.empty-state .icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(24,84,79,.07);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

/* Testimonials */
.testimonials-section { background: var(--color-surface); position: relative; overflow: hidden; }
.testimonials-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  opacity: .05;
}
.t-wrap { position: relative; }
.t-head-row { margin-bottom: 36px; }
.rating-badge { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.rating-badge .score { font-size: 1.6rem; font-weight: 800; color: var(--color-accent); }
.stars { display: inline-flex; gap: 2px; color: var(--color-accent); }
.t-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.t-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  height: 100%;
  transition: box-shadow .25s;
}
.t-card:hover { box-shadow: var(--shadow-hover); }
.t-quote-icon { font-size: 2rem; line-height: 1; color: rgba(24,84,79,.25); font-family: Georgia, serif; margin-bottom: 8px; }
.t-card .t-text { font-size: .95rem; color: var(--color-text); margin-bottom: 20px; line-height: 1.8; }
.t-person { border-top: 1px solid var(--color-border); padding-top: 16px; display: flex; align-items: center; gap: 10px; }
.t-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .875rem;
  font-weight: 700;
  flex-shrink: 0;
}
.t-name { font-size: .9375rem; font-weight: 700; color: var(--color-text); line-height: 1.3; }
.t-role { font-size: .8125rem; color: var(--color-text-secondary); line-height: 1.3; }

/* Download CTA */
.download-cta { background: var(--color-primary-ink); position: relative; overflow: hidden; }
.download-cta .cta-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  opacity: .2;
}
.download-cta .cta-inner { position: relative; z-index: 1; text-align: center; padding: 96px 0; }
.download-cta h2 { color: #fff; font-size: clamp(1.6rem, 3.4vw, 2.4rem); font-weight: 800; max-width: 900px; margin: 0 auto 13px; }
.download-cta .cta-desc { color: rgba(255,255,255,.75); max-width: 640px; margin: 0 auto 40px; font-size: 1.0625rem; }
.platform-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-top: 8px;
}
.platform-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: #fff;
  color: var(--color-text);
  border-radius: 14px;
  padding: 12px 22px 12px 16px;
  min-width: 148px;
  text-align: left;
  transition: transform .2s, box-shadow .2s;
  box-shadow: 0 6px 18px rgba(0,0,0,.12);
  border: 1px solid rgba(255,255,255,.2);
}
.platform-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(0,0,0,.2); }
.platform-icon { width: 38px; height: 38px; border-radius: 9px; display: flex; align-items: center; justify-content: center; background: rgba(24,84,79,.1); color: var(--color-primary); flex-shrink: 0; }
.platform-label { display: flex; flex-direction: column; line-height: 1.2; }
.platform-label b { font-size: .9375rem; font-weight: 700; }
.platform-label span { font-size: .75rem; color: var(--color-text-secondary); }
.cta-note { margin-top: 28px; color: rgba(255,255,255,.45); font-size: .8125rem; }

/* Footer */
.site-footer { background: var(--color-primary-deep); color: #D9E4DF; padding: 64px 0 32px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; color: #fff; font-size: 1.3rem; font-weight: 800; }
.footer-brand p { font-size: .875rem; color: rgba(255,255,255,.65); max-width: 320px; line-height: 1.7; }
.footer-col h4 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 16px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: rgba(255,255,255,.62); font-size: .875rem; transition: color .2s; }
.footer-col a:hover { color: #fff; }
.footer-contacts p { font-size: .875rem; color: rgba(255,255,255,.65); margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: .8125rem;
  color: rgba(255,255,255,.45);
}

/* Mobile bottom tab */
.bottom-tabbar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  height: calc(60px + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
}
.bottom-tabbar .tab-inner {
  max-width: 560px;
  margin: 0 auto;
  height: 60px;
  display: flex;
}
.tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: var(--color-text-secondary);
  font-size: .6875rem;
  transition: color .2s;
}
.tab-item.active { color: var(--color-primary); font-weight: 700; }
.tab-item svg { width: 21px; height: 21px; }

/* Back to top */
.back-top {
  position: fixed;
  right: 22px;
  bottom: 92px;
  z-index: 60;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  border: none;
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(23,51,49,.18);
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s, transform .3s;
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { transform: translateY(-3px); }

/* Focus styles */
a:focus-visible, button:focus-visible { outline: 3px solid rgba(24,84,79,.45); outline-offset: 3px; border-radius: 4px; }

/* Media Queries */
@media (max-width: 1180px) {
  .feature-slider { grid-auto-columns: calc((100% - 20px) / 2); }
  .hero-inner { gap: 36px; }
}
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 36px; padding-top: 48px; }
  .hero h1 { max-width: unset; }
  .hero-visual { justify-content: center; margin-top: 12px; }
  .hero-device { max-width: 560px; }
  .req-grid { grid-template-columns: repeat(2, 1fr); }
  .t-grid { grid-template-columns: 1fr; max-width: 640px; margin: 0 auto; }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}
@media (max-width: 768px) {
  body { padding-bottom: calc(60px + env(safe-area-inset-bottom)); }
  .section { padding: var(--space-3xl) 0; }
  .main-nav { display: none; }
  .nav-cta { display: none; }
  .mobile-menu-toggle { display: inline-flex; width: 44px; height: 44px; background: transparent; border: 0; align-items: center; justify-content: center; border-radius: 12px; cursor: pointer; }
  .site-header { height: 60px; }
  .header-inner { height: 60px; }
  .brand-mark { width: 32px; height: 32px; border-radius: 9px; }
  .brand-text { font-size: 1.1rem; }
  .hero { min-height: auto; padding: 48px 0 40px; }
  .hero-content-wrap { padding: 32px 0 16px; }
  .hero-metrics { gap: 24px; margin-top: 24px; }
  .hero-visual { display: none; }
  .feature-slider { grid-auto-columns: 80%; }
  .req-grid { grid-template-columns: 1fr; gap: 18px; }
  .news-grid { grid-template-columns: 1fr; margin-top: 0; }
  .platform-buttons { gap: 10px; }
  .platform-btn { min-width: calc(50% - 5px); justify-content: flex-start; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; margin-bottom: 32px; }
  .footer-bottom { flex-direction: column; }
  .bottom-tabbar { display: block; }
}
@media (min-width: 769px) {
  .bottom-tabbar { display: none !important; }
  body { padding-bottom: 0; }
}

/* roulang page: category1 */
:root {
            --color-bg: #F6F3ED;
            --color-surface: #FFFFFF;
            --color-primary: #18544F;
            --color-primary-deep: #0D3A37;
            --color-primary-ink: #0A2B29;
            --color-accent: #BF623D;
            --color-accent-hover: #A24D2C;
            --color-text: #173331;
            --color-text-secondary: #5A6B68;
            --color-border: #E5DFD1;
            --color-border-strong: #C9C0AE;
            --color-light-text: #E9E1D3;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 1px 2px rgba(23, 51, 49, 0.04), 0 8px 20px rgba(23, 51, 49, 0.05);
            --shadow-hover: 0 12px 28px rgba(23, 51, 49, 0.10);
            --container: 1200px;
            --font-sans: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
        }

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

        html,
        body {
            margin: 0;
            padding: 0;
            background: var(--color-bg);
            color: var(--color-text);
            font-family: var(--font-sans);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        p {
            margin: 0 0 1rem;
        }

        h1,
        h2,
        h3,
        h4,
        h5 {
            margin: 0;
            line-height: 1.3;
            font-weight: 700;
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 90;
            height: 72px;
            background: rgba(255, 255, 255, 0.94);
            border-bottom: 1px solid transparent;
            transition: box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
            backdrop-filter: blur(10px);
        }

        .site-header.scrolled {
            border-color: var(--color-border);
            box-shadow: 0 6px 20px rgba(10, 43, 41, 0.05);
        }

        .header-inner {
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 6px 14px rgba(24, 84, 79, 0.18);
        }

        .brand-mark svg {
            display: block;
        }

        .brand-name {
            font-weight: 800;
            font-size: 1.2rem;
            letter-spacing: 0.01em;
            color: var(--color-primary-ink);
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 auto;
        }

        .nav-item {
            position: relative;
            display: inline-flex;
            align-items: center;
            min-height: 42px;
            padding: 0 16px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-secondary);
            border-radius: 8px;
            transition: color 0.18s ease, background 0.18s ease;
        }

        .nav-item::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 4px;
            height: 2px;
            border-radius: 2px;
            background: transparent;
            transition: background 0.18s ease;
        }

        .nav-item:hover {
            color: var(--color-primary);
            background: rgba(24, 84, 79, 0.06);
        }

        .nav-item.active {
            color: var(--color-primary);
            font-weight: 700;
        }

        .nav-item.active::after {
            background: var(--color-primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 0 26px;
            border-radius: var(--radius-pill);
            border: 1.5px solid transparent;
            font-weight: 700;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            cursor: pointer;
            transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
            outline: none;
            text-align: center;
            white-space: nowrap;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(24, 84, 79, 0.35);
            outline-offset: 3px;
        }

        .btn-accent {
            background: var(--color-accent);
            color: #fff;
            box-shadow: 0 8px 18px rgba(191, 98, 61, 0.2);
        }

        .btn-accent:hover {
            background: var(--color-accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(191, 98, 61, 0.24);
        }

        .btn-accent:active {
            transform: translateY(0);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(233, 225, 211, 0.75);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: #fff;
            color: #fff;
        }

        .nav-cta {
            min-height: 42px;
            padding: 0 20px;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .mobile-bottom-tab {
            display: none;
            position: fixed;
            left: 0;
            bottom: 0;
            z-index: 95;
            width: 100%;
            height: calc(64px + env(safe-area-inset-bottom));
            padding-bottom: env(safe-area-inset-bottom);
            background: var(--color-surface);
            border-top: 1px solid var(--color-border);
            box-shadow: 0 -4px 16px rgba(10, 43, 41, 0.04);
        }

        .mobile-bottom-tab a {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            color: var(--color-text-secondary);
            font-size: 0.6875rem;
            font-weight: 600;
            transition: color 0.15s ease;
            min-height: 60px;
        }

        .mobile-bottom-tab a .tab-icon {
            width: 24px;
            height: 24px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .mobile-bottom-tab a .tab-icon svg {
            width: 22px;
            height: 22px;
            display: block;
        }

        .mobile-bottom-tab a.active {
            color: var(--color-primary);
            font-weight: 700;
        }

        .page-hero {
            position: relative;
            overflow: hidden;
            background-color: var(--color-primary-deep);
            background-image: linear-gradient(rgba(10, 43, 41, 0.78), rgba(13, 58, 55, 0.92)), url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center 30%;
            color: #fff;
            padding: 96px 0 84px;
        }

        .breadcrumb {
            margin-bottom: 56px;
        }

        .crumb-list {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 0.875rem;
            color: rgba(233, 225, 211, 0.78);
        }

        .crumb-list li {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .crumb-list a {
            color: rgba(233, 225, 211, 0.85);
            transition: color 0.15s ease;
        }

        .crumb-list a:hover {
            color: #fff;
        }

        .crumb-sep {
            color: rgba(233, 225, 211, 0.45);
        }

        .page-hero-content {
            max-width: 860px;
        }

        .page-hero-content .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 18px;
            color: #E9D8C2;
            font-size: 0.9375rem;
            font-weight: 700;
            letter-spacing: 0.04em;
        }

        .page-hero-content .eyebrow::before {
            content: "";
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--color-accent);
        }

        .page-hero-content h1 {
            max-width: 680px;
            font-size: clamp(1.9rem, 4.2vw, 3.1rem);
            line-height: 1.18;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 22px;
        }

        .page-hero-content .hero-lead {
            max-width: 44rem;
            font-size: 1.0625rem;
            line-height: 1.8;
            color: rgba(233, 225, 211, 0.9);
            margin-bottom: 0;
        }

        .section {
            padding: 88px 0;
        }

        .section-alt {
            background: var(--color-surface);
        }

        .about-split {
            background: var(--color-surface);
            padding: 88px 0;
        }

        .split-media {
            margin-bottom: 0;
        }

        .split-media img {
            width: 100%;
            height: 100%;
            min-height: 280px;
            object-fit: cover;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
        }

        .split-copy {
            padding-left: 10px;
        }

        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
            color: var(--color-primary);
            font-size: 0.8125rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        .section-kicker::before {
            content: "";
            width: 18px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
        }

        .split-copy h2,
        .section-heading h2 {
            font-size: clamp(1.45rem, 3vw, 2.15rem);
            line-height: 1.3;
            font-weight: 800;
            margin-bottom: 18px;
            letter-spacing: -0.02em;
        }

        .split-copy .copy-lead {
            font-size: 1.0625rem;
            color: var(--color-text-secondary);
            margin-bottom: 20px;
        }

        .split-copy p {
            line-height: 1.85;
            color: var(--color-text-secondary);
        }

        .check-list {
            margin-top: 24px;
            border-top: 1px solid var(--color-border);
        }

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px 0;
            border-bottom: 1px solid var(--color-border);
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--color-text);
        }

        .check-list li svg {
            flex-shrink: 0;
            margin-top: 4px;
            color: var(--color-primary);
        }

        .metrics-band {
            padding: 72px 0;
            background: var(--color-bg);
        }

        .metric-header {
            margin-bottom: 44px;
        }

        .metric-header h2 {
            font-size: clamp(1.35rem, 2.6vw, 1.9rem);
            font-weight: 800;
            margin-top: 6px;
        }

        .metric-header p {
            color: var(--color-text-secondary);
            font-size: 1rem;
            max-width: 640px;
            margin-bottom: 0;
        }

        .stat-row {
            border-top: 2px solid var(--color-primary);
            display: grid;
            grid-template-columns: repeat(4, 1fr);
        }

        .stat-item {
            padding: 28px 24px 24px 0;
            border-right: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .stat-item + .stat-item {
            padding-left: 24px;
        }

        .stat-item:last-child {
            border-right: none;
        }

        .stat-num {
            font-size: clamp(2rem, 4vw, 2.9rem);
            font-weight: 800;
            line-height: 1.1;
            color: var(--color-primary);
            letter-spacing: -0.02em;
        }

        .stat-num small {
            font-size: 1rem;
            font-weight: 700;
            margin-left: 4px;
            color: var(--color-accent);
        }

        .stat-label {
            margin-top: 10px;
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--color-text);
        }

        .stat-hint {
            margin-top: 4px;
            font-size: 0.8125rem;
            color: var(--color-text-secondary);
        }

        .capability-section {
            background: var(--color-surface);
            padding: 88px 0 96px;
        }

        .section-heading {
            max-width: 760px;
            margin-bottom: 48px;
        }

        .section-heading p {
            color: var(--color-text-secondary);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .cap-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .cap-card {
            position: relative;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 34px 30px 28px;
            overflow: hidden;
            transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
        }

        .cap-card::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            width: 4px;
            height: 100%;
            background: var(--color-primary);
            border-radius: 0 4px 4px 0;
        }

        .cap-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--color-border-strong);
        }

        .cap-top {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 16px;
        }

        .cap-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: rgba(24, 84, 79, 0.1);
            color: var(--color-primary);
            font-weight: 800;
            font-size: 0.9rem;
        }

        .cap-card h3 {
            font-size: 1.15rem;
            font-weight: 800;
            margin-bottom: 0;
        }

        .cap-card p {
            color: var(--color-text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .cap-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 18px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 0.8125rem;
            font-weight: 600;
            background: rgba(24, 84, 79, 0.08);
            color: var(--color-primary);
        }

        .cta-section {
            padding: 0;
            background: transparent;
        }

        .cta-box {
            position: relative;
            overflow: hidden;
            border-radius: 20px;
            background-color: var(--color-primary-deep);
            background-image: linear-gradient(120deg, var(--color-primary-ink), var(--color-primary-deep));
            color: #fff;
            padding: 72px 56px;
            margin: 88px auto;
            box-shadow: 0 18px 40px rgba(10, 43, 41, 0.18);
        }

        .cta-box::after {
            content: "";
            position: absolute;
            right: -60px;
            top: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            border: 1px solid rgba(233, 225, 211, 0.12);
        }

        .cta-content {
            position: relative;
            z-index: 1;
            max-width: 740px;
        }

        .cta-content h2 {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 16px;
        }

        .cta-content p {
            color: rgba(233, 225, 211, 0.85);
            font-size: 1rem;
            line-height: 1.85;
            margin-bottom: 28px;
            max-width: 640px;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .site-footer {
            background: var(--color-primary-ink);
            color: var(--color-light-text);
            padding: 76px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2.2fr 1fr 1fr 2fr;
            gap: 44px;
            padding-bottom: 52px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.1rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-logo .brand-mark {
            background: var(--color-accent);
        }

        .footer-brand p {
            color: rgba(233, 225, 211, 0.68);
            font-size: 0.9rem;
            line-height: 1.8;
            max-width: 320px;
            margin-bottom: 0;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 0.9375rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col a {
            color: rgba(233, 225, 211, 0.68);
            font-size: 0.9rem;
            transition: color 0.15s ease;
        }

        .footer-col a:hover {
            color: #fff;
        }

        .footer-contacts p {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            margin-bottom: 10px;
            color: rgba(233, 225, 211, 0.68);
            font-size: 0.9rem;
        }

        .footer-contacts svg {
            flex-shrink: 0;
            margin-top: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(233, 225, 211, 0.15);
            padding: 22px 0 26px;
            display: flex;
            justify-content: space-between;
            gap: 16px;
            font-size: 0.8125rem;
            color: rgba(233, 225, 211, 0.55);
        }

        .footer-bottom span {
            opacity: 0.85;
        }

        @media (max-width: 1024px) {
            .main-nav {
                gap: 2px;
            }

            .nav-item {
                padding: 0 12px;
            }

            .header-inner {
                gap: 10px;
            }

            .nav-cta {
                padding: 0 16px;
                font-size: 0.875rem;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .site-header {
                height: 60px;
            }

            .header-inner {
                height: 60px;
            }

            .main-nav {
                display: none;
            }

            .brand-logo {
                gap: 8px;
            }

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

            .brand-name {
                font-size: 1.05rem;
            }

            .nav-cta {
                min-height: 40px;
                padding: 0 14px;
                font-size: 0.8125rem;
            }

            .mobile-bottom-tab {
                display: flex;
            }

            body {
                padding-bottom: calc(72px + env(safe-area-inset-bottom));
            }

            .page-hero {
                padding: 64px 0 56px;
            }

            .breadcrumb {
                margin-bottom: 40px;
            }

            .page-hero-content h1 {
                font-size: 1.75rem;
            }

            .page-hero-content .hero-lead {
                font-size: 1rem;
            }

            .section {
                padding: 56px 0;
            }

            .about-split {
                padding: 56px 0;
            }

            .split-copy {
                padding-left: 0;
                margin-top: 28px;
            }

            .split-media img {
                min-height: 220px;
                max-height: 300px;
            }

            .split-copy .copy-lead {
                font-size: 1rem;
            }

            .metrics-band {
                padding: 48px 0;
            }

            .stat-row {
                grid-template-columns: repeat(2, 1fr);
                border-top: 2px solid var(--color-primary);
            }

            .stat-item {
                padding: 22px 12px 18px 0;
                border-right: 1px solid var(--color-border);
                border-bottom: 1px solid var(--color-border);
            }

            .stat-item:nth-child(2n) {
                padding-left: 16px;
                border-right: none;
            }

            .capability-section {
                padding: 56px 0 64px;
            }

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

            .cap-card {
                padding: 28px 22px 24px;
            }

            .cap-card h3 {
                font-size: 1.05rem;
            }

            .cta-box {
                padding: 42px 28px;
                margin: 48px 0 56px;
                border-radius: 16px;
            }

            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-actions .btn {
                width: 100%;
            }

            .site-footer {
                padding-top: 48px;
                padding-bottom: 0;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px 24px;
                padding-bottom: 40px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }

            .footer-contacts {
                grid-column: 1 / -1;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                padding-bottom: 20px;
            }
        }

        @media (max-width: 520px) {
            .page-hero {
                padding: 44px 0 40px;
            }

            .page-hero-content h1 {
                font-size: 1.55rem;
            }

            .stat-row {
                grid-template-columns: 1fr;
            }

            .stat-item,
            .stat-item:nth-child(2n) {
                width: 100%;
                padding: 16px 0;
                border-right: none;
                border-bottom: 1px solid var(--color-border);
            }

            .stat-item:last-child {
                border-bottom: none;
            }

            .cap-card::before {
                width: 3px;
            }

            .cta-box {
                padding: 36px 20px;
                margin: 36px 0 40px;
            }

            .section-heading h2 {
                font-size: 1.45rem;
            }

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

            .footer-brand {
                grid-column: auto;
            }

            .footer-contacts {
                grid-column: auto;
            }
        }

/* roulang page: article */
:root {
            --color-bg: #F6F3ED;
            --color-surface: #FFFFFF;
            --color-primary: #18544F;
            --color-primary-deep: #0D3A37;
            --color-primary-ink: #0A2B29;
            --color-accent: #BF623D;
            --color-accent-hover: #A24D2C;
            --color-text: #173331;
            --color-text-secondary: #5A6B68;
            --color-border: #E5DFD1;
            --color-border-strong: #C9C0AE;
            --color-success: #2E7D62;
            --color-error: #B44038;
            --radius-card: 14px;
            --radius-field: 10px;
            --radius-pill: 999px;
            --shadow-card: 0 1px 2px rgba(23, 51, 49, .04), 0 8px 20px rgba(23, 51, 49, .05);
            --shadow-hover: 0 12px 28px rgba(23, 51, 49, .10);
            --font-main: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 90px;
        }

        body {
            margin: 0;
            font-family: var(--font-main);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        img {
            display: block;
            max-width: 100%;
            border: 0;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color .18s ease, background .18s ease, border .18s ease, box-shadow .18s ease, transform .18s ease;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
        }

        ul,
        ol,
        p,
        figure,
        blockquote,
        dl,
        dd {
            margin: 0;
            padding: 0;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .grid-container {
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-head {
            margin-bottom: 36px;
        }

        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: .8125rem;
            font-weight: 700;
            letter-spacing: .02em;
            color: var(--color-primary);
            text-transform: uppercase;
        }

        .section-kicker::before {
            content: "";
            width: 20px;
            height: 3px;
            border-radius: 999px;
            background: var(--color-accent);
        }

        .section-title {
            margin: 8px 0 0;
            font-size: clamp(1.55rem, 3vw, 2.25rem);
            font-weight: 800;
            line-height: 1.3;
            color: var(--color-text);
            letter-spacing: -.01em;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 0 24px;
            border-radius: var(--radius-pill);
            font-size: .9375rem;
            font-weight: 700;
            border: 1.5px solid transparent;
            cursor: pointer;
            transition: all .2s ease;
            outline: none;
            white-space: nowrap;
            line-height: 1.2;
        }

        .btn:focus-visible {
            box-shadow: 0 0 0 4px rgba(191, 98, 61, .25);
        }

        .btn-primary {
            background: var(--color-accent);
            color: #fff;
            border-color: var(--color-accent);
        }

        .btn-primary:hover {
            background: var(--color-accent-hover);
            border-color: var(--color-accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-outline {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: transparent;
        }

        .btn-outline:hover {
            background: rgba(24, 84, 79, .08);
            color: var(--color-primary-deep);
        }

        .btn-sm {
            min-height: 42px;
            padding: 0 18px;
        }

        .post-tag,
        .tag-pill {
            display: inline-flex;
            align-items: center;
            min-height: 24px;
            padding: 0 12px;
            border-radius: var(--radius-pill);
            background: rgba(24, 84, 79, .1);
            color: var(--color-primary);
            font-size: .75rem;
            font-weight: 700;
            line-height: 1;
        }

        .post-tag-accent {
            background: rgba(191, 98, 61, .12);
            color: var(--color-accent-hover);
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            height: 72px;
            background: rgba(246, 243, 237, .96);
            -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(201, 192, 174, .70);
        }

        .navbar {
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--color-primary-deep);
            letter-spacing: -.01em;
            flex-shrink: 0;
        }

        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 9px;
            background: var(--color-primary);
            color: #fff;
        }

        .desktop-menu {
            display: flex;
            align-items: center;
            gap: 2px;
            margin: 0 auto;
            padding: 0 8px;
        }

        .desktop-menu .nav-item {
            position: relative;
            display: inline-flex;
            align-items: center;
            min-height: 42px;
            padding: 0 16px;
            color: var(--color-text-secondary);
            font-weight: 600;
            font-size: .9375rem;
            border-radius: 999px;
        }

        .desktop-menu .nav-item:hover {
            color: var(--color-primary);
            background: rgba(24, 84, 79, .06);
        }

        .desktop-menu .nav-item.active {
            color: var(--color-primary);
            font-weight: 800;
            background: rgba(24, 84, 79, .10);
        }

        .desktop-menu .nav-item.active::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: 4px;
            width: 18px;
            height: 3px;
            border-radius: 99px;
            background: var(--color-accent);
            transform: translateX(-50%);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .mobile-mini-download {
            display: none;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 999px;
            background: var(--color-accent);
            color: #fff;
        }

        .mobile-mini-download:hover,
        .mobile-mini-download:active {
            background: var(--color-accent-hover);
            color: #fff;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-bar {
            padding: 22px 0 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: .875rem;
            color: var(--color-text-secondary);
        }

        .breadcrumb a {
            color: var(--color-text-secondary);
            font-weight: 500;
        }

        .breadcrumb a:hover {
            color: var(--color-primary);
        }

        .breadcrumb .sep {
            color: var(--color-border-strong);
        }

        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 700;
            max-width: 260px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* ===== 文章页头部 ===== */
        .post-heading {
            background: var(--color-primary-deep);
            color: #f7f2e9;
            margin-top: 18px;
            padding: 48px 0 52px;
        }

        .post-heading .breadcrumb {
            color: rgba(255, 255, 255, .66);
        }

        .post-heading .breadcrumb a {
            color: rgba(255, 255, 255, .72);
        }

        .post-heading .breadcrumb a:hover {
            color: #fff;
        }

        .post-heading .breadcrumb .sep {
            color: rgba(255, 255, 255, .36);
        }

        .post-heading .breadcrumb .current {
            color: #fff;
        }

        .post-heading-wrap {
            max-width: 900px;
        }

        .post-kicker {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        .post-meta-line {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            color: rgba(247, 242, 233, .76);
            font-size: .875rem;
            margin-top: 14px;
        }

        .post-meta-line span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .post-heading h1 {
            margin: 16px 0 0;
            font-size: clamp(1.85rem, 4vw, 3rem);
            font-weight: 800;
            line-height: 1.25;
            color: #fff;
            letter-spacing: -.02em;
        }

        .post-heading h1 a {
            color: #fff;
        }

        /* ===== 正文布局 ===== */
        .post-layout {
            padding-top: 36px;
            padding-bottom: 20px;
        }

        .post-cover {
            border-radius: var(--radius-card);
            overflow: hidden;
            background: var(--color-surface);
            box-shadow: var(--shadow-card);
            margin-bottom: 36px;
        }

        .post-cover img {
            width: 100%;
            aspect-ratio: 16 / 8.6;
            object-fit: cover;
        }

        .post-article {
            max-width: 820px;
            margin: 0 auto;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: 16px;
            box-shadow: var(--shadow-card);
            padding: 28px 32px 40px;
        }

        .article-content {
            max-width: 760px;
            margin: 0 auto;
            font-size: 1.0625rem;
            line-height: 1.85;
            color: var(--color-text);
            word-break: break-word;
        }

        .article-content p {
            margin: 0 0 1.4rem;
        }

        .article-content img {
            width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 28px 0 12px;
        }

        .article-content figure {
            margin: 28px 0;
        }

        .article-content figure img {
            margin: 0;
        }

        .article-content figcaption {
            margin-top: 10px;
            font-size: .875rem;
            color: var(--color-text-secondary);
            text-align: center;
        }

        .article-content h2 {
            margin: 64px 0 18px;
            font-size: 1.65rem;
            font-weight: 800;
            color: var(--color-text);
            line-height: 1.35;
            padding-top: 8px;
        }

        .article-content h3 {
            margin: 44px 0 14px;
            font-size: 1.28rem;
            font-weight: 700;
            color: var(--color-primary-deep);
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 1.5rem 24px;
        }

        .article-content ul li,
        .article-content ol li {
            margin: 10px 0;
            padding-left: 4px;
        }

        .article-content blockquote {
            margin: 30px 0;
            padding: 22px 26px;
            border-left: 5px solid var(--color-accent);
            background: rgba(191, 98, 61, .06);
            border-radius: 0 12px 12px 0;
            color: var(--color-text-secondary);
            font-size: 1.05rem;
        }

        .article-content a {
            color: var(--color-primary);
            border-bottom: 1px solid rgba(24, 84, 79, .4);
            font-weight: 600;
        }

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

        .article-content code {
            background: rgba(24, 84, 79, .08);
            border-radius: 6px;
            padding: 2px 6px;
            font-size: .92em;
            color: var(--color-primary-deep);
        }

        .article-content pre {
            background: var(--color-primary-ink);
            color: #f6f3ed;
            padding: 20px 22px;
            border-radius: 14px;
            overflow-x: auto;
            line-height: 1.6;
            font-size: .9rem;
            margin: 28px 0;
        }

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

        .article-content hr {
            border: 0;
            border-top: 2px solid var(--color-border);
            margin: 44px 0;
        }

        .post-footer-info {
            border-top: 1px solid var(--color-border);
            margin-top: 40px;
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            flex-wrap: wrap;
        }

        .back-cat-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            color: var(--color-primary);
            border-radius: 999px;
            padding: 10px 16px;
            border: 1.5px solid var(--color-primary);
            background: transparent;
            transition: all .2s ease;
        }

        .back-cat-link:hover {
            background: rgba(24, 84, 79, .08);
            transform: translateX(-2px);
        }

        /* ===== 内容未找到 ===== */
        .post-empty {
            max-width: 760px;
            margin: 56px auto 80px;
            text-align: center;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: 18px;
            box-shadow: var(--shadow-card);
            padding: 72px 32px;
        }

        .post-empty-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 22px;
            border-radius: 20px;
            background: rgba(24, 84, 79, .08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
        }

        .post-empty h1 {
            font-size: clamp(1.6rem, 3.4vw, 2.3rem);
            font-weight: 800;
            color: var(--color-text);
            margin: 0 0 14px;
        }

        .post-empty p {
            color: var(--color-text-secondary);
            font-size: 1rem;
            max-width: 440px;
            margin: 0 auto 28px;
        }

        /* ===== 相关阅读 ===== */
        .related-section {
            background: var(--color-surface);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            padding: 84px 0 88px;
            margin-top: 24px;
        }

        .related-card {
            display: flex;
            flex-direction: column;
            height: 100%;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: transform .2s ease, box-shadow .2s ease;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .related-card-img {
            position: relative;
            aspect-ratio: 16 / 10;
            background: rgba(24, 84, 79, .06);
        }

        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .related-card-body {
            padding: 22px 22px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .related-card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            line-height: 1.5;
            margin: 10px 0 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            color: var(--color-text);
        }

        .related-card-body p {
            color: var(--color-text-secondary);
            font-size: .9rem;
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 20px;
        }

        .related-card-foot {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: .8125rem;
            color: var(--color-text-secondary);
        }

        .related-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--color-primary);
            font-weight: 700;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-primary-deep);
            color: rgba(247, 242, 233, .82);
            padding-top: 70px;
            padding-bottom: 24px;
            border-top: 1px solid rgba(255, 255, 255, .06);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr .9fr .9fr 1fr;
            gap: 40px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 9px;
            color: #fff;
            font-size: 1.25rem;
            font-weight: 800;
        }

        .brand-mark,
        .footer-brand svg {
            width: 18px;
            height: 18px;
        }

        .footer-brand p {
            margin-top: 16px;
            max-width: 320px;
            font-size: .9rem;
            color: rgba(247, 242, 233, .68);
            line-height: 1.8;
        }

        .footer-col h4 {
            color: #fff;
            font-size: .9375rem;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: .02em;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul a {
            color: rgba(247, 242, 233, .74);
            font-size: .9rem;
        }

        .footer-col ul a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .footer-contacts p {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: .9rem;
            margin: 0 0 10px;
            color: rgba(247, 242, 233, .7);
            line-height: 1.6;
        }

        .footer-contacts svg {
            flex-shrink: 0;
            color: var(--color-accent);
        }

        .footer-bottom {
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, .08);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            color: rgba(247, 242, 233, .55);
            font-size: .8125rem;
        }

        /* ===== 移动端底部导航 ===== */
        .mobile-bottom-tabbar {
            display: none;
            position: fixed;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 200;
            height: 64px;
            padding-bottom: env(safe-area-inset-bottom);
            background: var(--color-surface);
            border-top: 1px solid var(--color-border);
            box-shadow: 0 -2px 12px rgba(23, 51, 49, .04);
        }

        .bottom-tab-inner {
            display: flex;
            height: 64px;
            max-width: 560px;
            margin: 0 auto;
            align-items: stretch;
        }

        .tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            color: var(--color-text-secondary);
            font-size: .75rem;
            font-weight: 600;
            min-width: 0;
        }

        .tab-item svg {
            width: 22px;
            height: 22px;
        }

        .tab-item:hover,
        .tab-item:active {
            color: var(--color-primary);
            background: rgba(24, 84, 79, .04);
        }

        .tab-item.active {
            color: var(--color-primary);
            font-weight: 800;
        }

        .tab-item.active svg path,
        .tab-item.active svg rect {
            stroke-width: 2.4;
        }

        /* ===== 通用网格卡片 ===== */
        .related-grid {
            margin: 0 -12px;
        }

        .related-grid .cell {
            padding: 0 12px 24px;
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .desktop-menu .nav-item {
                padding: 0 10px;
            }
        }

        @media (max-width: 768px) {
            body {
                padding-bottom: 76px;
            }

            .site-header,
            .navbar {
                height: 60px;
            }

            .navbar {
                padding: 0 16px;
            }

            .desktop-menu,
            .header-actions .btn-nav-cta {
                display: none;
            }

            .header-actions {
                display: flex;
            }

            .mobile-mini-download {
                display: inline-flex;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .post-heading {
                padding: 30px 0 34px;
                margin-top: 10px;
            }

            .post-heading h1 {
                font-size: 1.75rem;
            }

            .breadcrumb-bar {
                padding-top: 14px;
            }

            .post-article {
                padding: 20px 18px 32px;
            }

            .article-content h2 {
                font-size: 1.32rem;
                margin-top: 44px;
            }

            .related-section {
                padding: 48px 0;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 26px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
                margin-top: 30px;
            }

            .mobile-bottom-tabbar {
                display: block;
            }
        }

        @media (max-width: 520px) {
            .post-cover img {
                aspect-ratio: 4 / 3;
            }

            .post-meta-line {
                gap: 12px;
                font-size: .8125rem;
            }

            .post-footer-info {
                flex-direction: column;
                align-items: flex-start;
            }

            .post-heading .breadcrumb .current {
                max-width: 140px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: .01ms !important;
                transition-duration: .01ms !important;
            }
        }

/* roulang page: category2 */
:root{
  --color-bg:#F6F3ED;
  --color-surface:#FFFFFF;
  --color-primary:#18544F;
  --color-primary-deep:#0D3A37;
  --color-primary-ink:#0A2B29;
  --color-accent:#BF623D;
  --color-accent-hover:#A24D2C;
  --color-text:#173331;
  --color-text-secondary:#5A6B68;
  --color-border:#E5DFD1;
  --color-border-strong:#C9C0AE;
  --radius-large:16px;
  --radius-medium:12px;
  --radius-pill:999px;
  --shadow-card:0 1px 2px rgba(23,51,49,.04),0 8px 20px rgba(23,51,49,.05);
  --shadow-hover:0 12px 28px rgba(23,51,49,.10);
  --space-section-lg:96px;
  --space-section-md:64px;
  --space-section-sm:48px;
}

*{
  box-sizing:border-box;
}

html{
  scroll-behavior:smooth;
}

body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
  background:var(--color-bg);
  color:var(--color-text);
  line-height:1.75;
  font-size:1rem;
  -webkit-font-smoothing:antialiased;
}

img{
  max-width:100%;
  display:block;
}

a{
  text-decoration:none;
  color:inherit;
}

ul,ol,li{
  margin:0;
  padding:0;
  list-style:none;
}

button{
  font-family:inherit;
}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}

.page-main{
  min-height:70vh;
}

/* buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  border:0;
  border-radius:var(--radius-pill);
  font-weight:700;
  font-size:.9375rem;
  min-height:46px;
  padding:0 24px;
  cursor:pointer;
  transition:background .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  text-align:center;
}

.btn:focus-visible{
  outline:3px solid rgba(24,84,79,.35);
  outline-offset:2px;
}

.btn-primary{
  background:var(--color-accent);
  color:#fff;
}

.btn-primary:hover{
  background:var(--color-accent-hover);
  transform:translateY(-1px);
  box-shadow:var(--shadow-hover);
}

.btn-primary:active{
  transform:translateY(0);
}

.btn-outline{
  background:transparent;
  color:var(--color-primary);
  border:1.5px solid rgba(24,84,79,.65);
}

.btn-outline:hover{
  background:rgba(24,84,79,.08);
  border-color:var(--color-primary);
}

.btn-header{
  min-height:42px;
  padding:0 20px;
  font-size:.875rem;
}

/* header */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,243,237,.9);
  border-bottom:1px solid var(--color-border);
  backdrop-filter:blur(14px);
}

.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:72px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-right:16px;
  flex-shrink:0;
}

.brand-mark{
  width:40px;
  height:40px;
  border-radius:12px;
  background:var(--color-primary-deep);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  transition:background .2s ease;
}

.brand:hover .brand-mark{
  background:var(--color-primary);
}

.brand-name{
  font-weight:800;
  font-size:1.3125rem;
  letter-spacing:.01em;
  color:var(--color-text);
  white-space:nowrap;
}

.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
  flex:1;
}

.nav-item{
  position:relative;
  padding:9px 15px;
  border-radius:var(--radius-pill);
  font-size:.9375rem;
  font-weight:600;
  color:var(--color-text-secondary);
  transition:color .2s ease,background .2s ease;
}

.nav-item:hover{
  color:var(--color-primary);
  background:rgba(24,84,79,.07);
}

.nav-item.active{
  color:var(--color-primary);
  background:rgba(24,84,79,.10);
  font-weight:800;
}

.nav-item.active::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:0;
  width:16px;
  height:2px;
  background:var(--color-accent);
  border-radius:2px;
  transform:translateX(-50%);
}

.header-tools{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:auto;
}

.mobile-dl{
  display:none;
  width:42px;
  height:42px;
  align-items:center;
  justify-content:center;
  color:var(--color-primary);
  background:rgba(24,84,79,.08);
  border-radius:50%;
  transition:background .2s ease;
}

.mobile-dl:hover{
  background:rgba(24,84,79,.16);
}

.mobile-dl svg{
  width:20px;
  height:20px;
  stroke:currentColor;
  fill:none;
  stroke-width:1.9;
  stroke-linecap:round;
  stroke-linejoin:round;
}

/* bottom mobile tab */
.bottom-tab{
  display:none;
  position:fixed;
  bottom:0;
  left:0;
  right:0;
  z-index:80;
  background:var(--color-surface);
  border-top:1px solid var(--color-border);
  box-shadow:0 -6px 20px rgba(23,51,49,.05);
  padding-bottom:env(safe-area-inset-bottom);
}

.bottom-tab-inner{
  display:flex;
  height:64px;
  align-items:center;
  justify-content:space-around;
}

.tab-item{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  width:20%;
  height:100%;
  color:var(--color-text-secondary);
  font-size:.6875rem;
  border-radius:8px;
  transition:color .2s ease,background .2s ease;
}

.tab-item svg{
  width:22px;
  height:22px;
  fill:none;
  stroke:currentColor;
  stroke-width:1.8;
  stroke-linecap:round;
  stroke-linejoin:round;
}

.tab-item.active{
  color:var(--color-primary);
  background:rgba(24,84,79,.08);
  font-weight:800;
}

/* category hero */
.category-hero{
  position:relative;
  background:var(--color-primary-ink);
  background-image:linear-gradient(115deg,rgba(10,43,41,.96) 10%,rgba(13,58,55,.90) 72%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  color:rgba(244,240,230,.96);
  padding:64px 0 84px;
  overflow:hidden;
}

.category-hero::after{
  content:"";
  position:absolute;
  right:-90px;
  bottom:-120px;
  width:320px;
  height:320px;
  border:1px solid rgba(240,229,207,.14);
  border-radius:50%;
}

.category-hero .container{
  position:relative;
  z-index:1;
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  align-items:center;
  color:rgba(239,233,221,.72);
  font-size:.875rem;
  margin-bottom:34px;
}

.breadcrumb a{
  color:rgba(239,233,221,.82);
  transition:color .2s ease;
}

.breadcrumb a:hover{
  color:#fff;
}

.crumb-divider{
  opacity:.5;
}

.category-hero h1{
  font-size:clamp(2.1rem,4.8vw,3.4rem);
  line-height:1.18;
  font-weight:800;
  letter-spacing:-.01em;
  max-width:760px;
  color:#fff;
  margin:0 0 18px;
}

.hero-summary{
  max-width:640px;
  font-size:1.0625rem;
  color:rgba(239,233,221,.82);
  line-height:1.8;
  margin-bottom:28px;
}

.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}

.hero-actions .btn-outline{
  color:#fff;
  border-color:rgba(255,255,255,.75);
}

.hero-actions .btn-outline:hover{
  background:rgba(255,255,255,.14);
  border-color:#fff;
}

.hero-overview-card{
  color:var(--color-text);
  background:#fff;
  border-radius:var(--radius-large);
  padding:20px;
  box-shadow:var(--shadow-card);
}

.hero-overview-card-label{
  font-size:.8125rem;
  font-weight:700;
  color:var(--color-primary);
  letter-spacing:.06em;
  margin-bottom:14px;
  display:flex;
  align-items:center;
  gap:8px;
}

.hero-overview-card-label::before{
  content:"";
  width:20px;
  height:2px;
  background:var(--color-accent);
  border-radius:2px;
}

.hero-overview-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:10px;
}

.hero-ov-item{
  background:#F8F5EE;
  border:1px solid var(--color-border);
  border-radius:12px;
  padding:12px 14px;
}

.hero-ov-item strong{
  display:block;
  font-size:.9375rem;
  font-weight:700;
  color:var(--color-text);
  margin-bottom:3px;
}

.hero-ov-item span{
  font-size:.8125rem;
  color:var(--color-text-secondary);
}

/* sections */
.content-section{
  padding:var(--space-section-lg) 0;
}

.content-section.surface{
  background:var(--color-surface);
}

.content-section.tinted{
  background:var(--color-bg);
}

.section-head{
  max-width:780px;
  margin-bottom:48px;
}

.section-head.center{
  margin-left:auto;
  margin-right:auto;
  text-align:center;
}

.section-head h2{
  font-size:clamp(1.5rem,3.2vw,2.25rem);
  font-weight:800;
  color:var(--color-text);
  line-height:1.28;
  margin:10px 0 12px;
}

.section-head p{
  color:var(--color-text-secondary);
  font-size:1.0625rem;
  max-width:680px;
}

.section-head.center p{
  margin-left:auto;
  margin-right:auto;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:.8125rem;
  font-weight:800;
  letter-spacing:.08em;
  color:var(--color-primary);
}

.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--color-accent);
  border-radius:2px;
}

/* services list */
.service-list{
  border-top:1px solid var(--color-border);
}

.service-row{
  display:grid;
  grid-template-columns:120px minmax(0,1fr) minmax(220px,300px);
  gap:32px;
  padding:44px 12px;
  border-bottom:1px solid var(--color-border);
  transition:background .25s ease;
}

.service-row:hover{
  background:rgba(246,243,237,.6);
}

.service-no{
  font-size:2.2rem;
  font-weight:800;
  line-height:1;
  color:rgba(24,84,79,.2);
  letter-spacing:-.02em;
}

.service-main h3{
  font-size:1.25rem;
  font-weight:800;
  margin:0 0 10px;
  color:var(--color-text);
}

.service-main p{
  max-width:640px;
  margin:0;
  color:var(--color-text-secondary);
  font-size:1rem;
}

.service-tags{
  display:flex;
  flex-wrap:wrap;
  align-content:flex-start;
  gap:8px;
  padding-top:4px;
}

.service-tag{
  background:rgba(24,84,79,.08);
  color:var(--color-primary);
  border-radius:999px;
  padding:4px 14px;
  font-size:.8125rem;
  font-weight:600;
  border:1px solid rgba(24,84,79,.08);
}

/* metric panel */
.metric-panel{
  display:grid;
  grid-template-columns:1fr 1fr 1fr;
  gap:0;
  background:var(--color-primary-deep);
  border-radius:var(--radius-large);
  padding:26px 8px;
  color:#fff;
  box-shadow:var(--shadow-hover);
}

.metric-cell{
  padding:26px 36px;
  text-align:center;
  border-left:1px solid rgba(255,255,255,.15);
}

.metric-cell:first-child{
  border-left:0;
}

.metric-number{
  font-size:2rem;
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.1;
  color:#FFD5BD;
}

.metric-label{
  margin-top:8px;
  font-size:.9375rem;
  color:rgba(239,233,221,.85);
}

.metric-cell section-alt p{
  color:var(--color-text-secondary);
}

/* solution visual strip */
.solution-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
}

.visual-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--radius-large);
  border:1px solid var(--color-border);
  box-shadow:var(--shadow-hover);
}

.visual-media+.solution-summary{
  padding-left:0;
}

.solution-summary h3{
  font-size:1.4rem;
  font-weight:800;
  color:var(--color-text);
  margin:0 0 12px;
}

.solution-summary .lead-text{
  color:var(--color-text-secondary);
  font-size:1rem;
  line-height:1.8;
  margin:0 0 24px;
}

.check-list li{
  position:relative;
  padding-left:32px;
  font-size:1rem;
  margin-bottom:12px;
  color:var(--color-text);
}

.check-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:.35em;
  width:8px;
  height:16px;
  border:solid var(--color-primary);
  border-width:0 2px 2px 0;
  transform:rotate(45deg);
}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:700;
  color:var(--color-primary);
  font-size:.9375rem;
  margin-top:16px;
  transition:color .2s ease;
}

.link-arrow svg{
  width:16px;
  height:16px;
  stroke:currentColor;
  fill:none;
  stroke-width:2;
  stroke-linecap:round;
  stroke-linejoin:round;
  transition:transform .2s ease;
}

.link-arrow:hover{
  color:var(--color-accent-hover);
}

.link-arrow:hover svg{
  transform:translateX(4px);
}

/* scenes tag */
.scene-card{
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius-large);
  padding:40px 32px;
  text-align:center;
  box-shadow:var(--shadow-card);
}

.scene-card p{
  color:var(--color-text-secondary);
  max-width:640px;
  margin-left:auto;
  margin-right:auto;
}

.scene-tags{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:12px;
  margin-top:26px;
}

.scene-pill{
  background:var(--color-bg);
  border:1px solid var(--color-border);
  color:var(--color-text);
  border-radius:999px;
  font-size:.875rem;
  font-weight:600;
  padding:9px 18px;
  transition:transform .2s,border-color .2s,box-shadow .2s;
}

.scene-pill:hover{
  border-color:var(--color-primary);
  color:var(--color-primary);
  transform:translateY(-2px);
  box-shadow:var(--shadow-hover);
}

/* process */
.process-steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}

.process-item{
  position:relative;
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-top:3px solid var(--color-primary);
  border-radius:var(--radius-medium);
  padding:28px 22px;
  box-shadow:var(--shadow-card);
  transition:transform .2s ease,box-shadow .2s ease;
}

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

.process-index{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  border-radius:50%;
  background:rgba(24,84,79,.1);
  color:var(--color-primary);
  font-weight:800;
  font-size:1rem;
  margin-bottom:14px;
}

.process-item h3{
  font-size:1.0625rem;
  font-weight:800;
  color:var(--color-text);
  margin:0 0 8px;
}

.process-item p{
  margin:0;
  color:var(--color-text-secondary);
  font-size:.90625rem;
}

/* FAQ */
.faq-card{
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius-large);
  padding:16px 28px;
  box-shadow:var(--shadow-card);
}

details.faq-item{
  border-bottom:1px solid var(--color-border);
}

details.faq-item:last-of-type{
  border-bottom:0;
}

.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 0;
  font-size:1rem;
  font-weight:600;
  color:var(--color-text);
  transition:color .2s ease;
}

.faq-item summary::-webkit-details-marker{
  display:none;
}

.faq-item summary::marker{
  content:"";
}

.faq-item summary .faq-icon{
  position:relative;
  width:24px;
  height:24px;
  flex:0 0 24px;
  border-radius:50%;
  border:1.5px solid var(--color-border-strong);
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}

.faq-item summary .faq-icon::before,
.faq-item summary .faq-icon::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  width:11px;
  height:1.5px;
  background:var(--color-primary);
  transform:translate(-50%,-50%);
}

.faq-item summary .faq-icon::after{
  transform:translate(-50%,-50%) rotate(90deg);
  transition:transform .2s ease;
}

.faq-item summary:hover{
  color:var(--color-primary);
}

.faq-item[open] summary{
  color:var(--color-primary);
  font-weight:800;
}

.faq-item[open] .faq-icon::after{
  transform:translate(-50%,-50%) rotate(0deg);
}

.faq-answer{
  padding:0 0 26px;
  color:var(--color-text-secondary);
  max-width:680px;
  font-size:.96875rem;
  line-height:1.8;
}

.faq-answer p{
  margin:0;
}

.support-side{
  position:sticky;
  top:104px;
  background:var(--color-primary-deep);
  border-radius:var(--radius-large);
  padding:34px 28px;
  color:rgba(242,236,225,.9);
  box-shadow:var(--shadow-hover);
}

.support-side h3{
  color:#fff;
  font-size:1.2rem;
  font-weight:800;
  margin:0 0 12px;
}

.support-side p{
  color:rgba(242,236,225,.82);
  font-size:.9375rem;
  line-height:1.8;
}

.support-side .btn{
  margin-top:20px;
  width:100%;
  background:var(--color-accent);
  color:#fff;
}

.support-side .btn:hover{
  background:var(--color-accent-hover);
}

.support-time{
  margin-top:24px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.16);
  display:flex;
  gap:10px;
  align-items:flex-start;
  color:rgba(242,236,225,.72);
  font-size:.875rem;
}

.support-time svg{
  width:19px;
  height:19px;
  stroke:currentColor;
  fill:none;
  stroke-width:1.8;
  stroke-linecap:round;
  stroke-linejoin:round;
  margin-top:3px;
  flex:0 0 19px;
}

/* download CTA */
.download-panel{
  position:relative;
  overflow:hidden;
  background:var(--color-primary-ink);
  background-image:linear-gradient(120deg,rgba(13,58,55,.96),rgba(10,43,41,.88)),url("/assets/images/backpic/back-3.png");
  background-size:cover;
  background-position:center;
  border-radius:24px;
  padding:76px 40px;
  text-align:center;
  color:#fff;
}

.download-panel h2{
  font-size:clamp(1.6rem,3.4vw,2.4rem);
  font-weight:800;
  line-height:1.25;
  margin:0 auto 14px;
  max-width:720px;
  color:#fff;
}

.download-panel p{
  color:rgba(239,233,221,.82);
  font-size:1rem;
  max-width:620px;
  margin:0 auto 34px;
}

.download-actions{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
  max-width:920px;
  margin:0 auto;
  text-align:left;
}

.platform-btn{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:12px;
  background:#fff;
  color:var(--color-text);
  border-radius:14px;
  padding:18px 14px;
  border:1px solid var(--color-border);
  box-shadow:var(--shadow-card);
  font-weight:600;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
}

.platform-btn:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-hover);
  background:#FDFAF4;
}

.platform-btn:active{
  transform:translateY(0);
}

.platform-btn svg{
  width:26px;
  height:26px;
  flex:0 0 26px;
  stroke:currentColor;
  fill:none;
  stroke-width:1.7;
  stroke-linecap:round;
  stroke-linejoin:round;
}

.platform-btn .platform-line strong{
  display:block;
  font-size:.96875rem;
  font-weight:800;
  line-height:1.3;
}

.platform-btn .platform-line span{
  font-size:.75rem;
  color:var(--color-text-secondary);
}

.btn-ghost-light{
  background:transparent;
  color:#fff;
  border:1px solid rgba(255,255,255,.5);
  margin-top:28px;
  min-height:44px;
}

.btn-ghost-light:hover{
  background:rgba(255,255,255,.12);
}

/* footer */
.site-footer{
  background:var(--color-primary-deep);
  color:rgba(239,233,221,.75);
  padding:64px 0 28px;
}

.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1.6fr;
  gap:48px;
  margin-bottom:48px;
}

.footer-logo{
  display:flex;
  align-items:center;
  gap:9px;
  color:#fff;
  font-weight:800;
  font-size:1.2rem;
  margin-bottom:12px;
}

.footer-logo .brand-mark{
  width:36px;
  height:36px;
  border-radius:11px;
}

.footer-brand p{
  color:rgba(239,233,221,.65);
  font-size:.96875rem;
  line-height:1.8;
  margin:12px 0 0;
  max-width:300px;
}

.footer-col h4{
  color:#fff;
  font-size:1rem;
  font-weight:800;
  margin:0 0 16px;
}

.footer-col ul li + li{
  margin-top:10px;
}

.footer-col a{
  color:rgba(239,233,221,.78);
  font-size:.9375rem;
  transition:color .2s ease;
}

.footer-col a:hover{
  color:#fff;
}

.footer-contacts p{
  display:flex;
  align-items:flex-start;
  gap:9px;
  margin:0 0 10px;
  color:rgba(239,233,221,.72);
  font-size:.90625rem;
}

.footer-contacts svg{
  flex:0 0 auto;
  margin-top:5px;
  stroke:currentColor;
  fill:none;
  stroke-width:1.8;
  stroke-linecap:round;
  stroke-linejoin:round;
}

.footer-bottom{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:20px;
  border-top:1px solid rgba(255,255,255,.14);
  padding-top:24px;
  font-size:.8125rem;
  color:rgba(239,233,221,.55);
}

/* responsive */
@media screen and (max-width:1024px){
  .header-inner{
    gap:10px;
  }
  .nav-item{
    padding:8px 11px;
    font-size:.875rem;
  }
  .service-row{
    grid-template-columns:80px minmax(0,1fr) minmax(190px,.8fr);
    gap:24px;
  }
  .solution-grid{
    gap:36px;
  }
  .footer-grid{
    grid-template-columns:1.4fr 1fr 1fr;
    gap:32px;
  }
  .footer-contacts{
    grid-column:1 / -1;
  }
}

@media screen and (max-width:768px){
  .content-section{
    padding:64px 0;
  }

  .category-hero{
    padding:44px 0 56px;
  }

  .header-inner{
    min-height:62px;
  }

  .site-header .main-nav,
  .site-header .btn-header{
    display:none;
  }

  .header-tools{
    margin-left:auto;
  }

  .mobile-dl{
    display:inline-flex;
  }

  .bottom-tab{
    display:block;
  }

  body{
    padding-bottom:calc(64px + env(safe-area-inset-bottom));
  }

  .service-row{
    grid-template-columns:1fr;
    padding:30px 4px;
    gap:12px;
    border-bottom:1px solid var(--color-border);
  }

  .service-no{
    font-size:1.5rem;
  }

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

  .metric-cell{
    border-left:0;
    border-top:1px solid rgba(255,255,255,.14);
    padding:22px 16px;
  }

  .metric-cell:first-child{
    border-top:0;
  }

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

  .process-steps{
    grid-template-columns:1fr 1fr;
  }

  .download-panel{
    padding:52px 22px;
    border-radius:18px;
  }

  .download-actions{
    grid-template-columns:1fr 1fr;
    gap:12px;
    max-width:560px;
  }

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

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

@media screen and (max-width:520px){
  .container{
    padding:0 16px;
  }

  .content-section{
    padding:48px 0;
  }

  .section-head{
    margin-bottom:32px;
  }

  .brand-mark{
    width:36px;
    height:36px;
  }

  .brand-name{
    font-size:1.125rem;
  }

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

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

  .platform-btn{
    justify-content:flex-start;
    padding-left:18px;
  }

  .process-steps{
    grid-template-columns:1fr;
  }

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

  .footer-contacts{
    grid-column:auto;
  }
}

/* roulang page: category3 */
:root {
  --color-bg: #F6F3ED;
  --color-surface: #FFFFFF;
  --color-primary: #18544F;
  --color-primary-deep: #0D3A37;
  --color-primary-ink: #0A2B29;
  --color-accent: #BF623D;
  --color-accent-hover: #A24D2C;
  --color-text: #173331;
  --color-text-secondary: #5A6B68;
  --color-border: #E5DFD1;
  --color-border-strong: #C9C0AE;
  --radius-lg: 16px;
  --radius-md: 12px;
  --shadow-card: 0 1px 2px rgba(23, 51, 49, .04), 0 8px 20px rgba(23, 51, 49, .05);
  --shadow-hover: 0 12px 28px rgba(23, 51, 49, .10);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  font-size: 1rem;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
main { display: block; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p, figure { margin: 0; }
button, input, select, textarea { font: inherit; color: inherit; }
.container, .grid-container { max-width: 1200px; margin: 0 auto; padding-left: 1.25rem; padding-right: 1.25rem; }
section { position: relative; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  border: 0; background: none; cursor: pointer; border-radius: 999px;
  font-weight: 700; text-decoration: none; transition: transform .18s ease, background .18s ease, box-shadow .18s ease, border-color .18s ease, opacity .18s ease;
  line-height: 1; font-size: .95rem;
}
.btn:focus-visible, a:focus-visible {
  outline: 3px solid rgba(24, 84, 79, .4);
  outline-offset: 2px;
}
.btn-accent { background: var(--color-accent); color: #fff; min-height: 48px; padding: 0 1.75rem; }
.btn-accent:hover { background: var(--color-accent-hover); transform: translateY(-2px); box-shadow: 0 10px 22px rgba(191, 98, 61, .24); }
.btn-outline {
  border: 1.5px solid var(--color-primary); color: var(--color-primary);
  background: transparent; min-height: 48px; padding: 0 1.6rem;
}
.btn-outline:hover { background: rgba(24, 84, 79, .08); }
.btn-outline-light { border-color: rgba(246, 243, 237, .65); color: #F6F3ED; background: transparent; }
.btn-outline-light:hover { background: rgba(246, 243, 237, .12); border-color: #F6F3ED; }
.btn-header { min-height: 40px; padding: 0 1.1rem; font-size: .85rem; flex-shrink: 0; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 80;
  background: rgba(246, 243, 237, .86);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner { min-height: 72px; display: flex; align-items: center; gap: 1.25rem; }
.brand { display: inline-flex; align-items: center; gap: .55rem; flex-shrink: 0; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 12px;
  background: var(--color-primary); color: #F6F3ED;
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 12px rgba(13, 58, 55, .22);
}
.brand-text { font-size: 1.15rem; font-weight: 800; color: var(--color-primary-ink); letter-spacing: .01em; white-space: nowrap; }
.main-nav { display: flex; align-items: center; gap: .25rem; margin-left: .25rem; }
.nav-item {
  position: relative; display: inline-flex; align-items: center;
  padding: .45rem .75rem; border-radius: 999px;
  color: var(--color-text-secondary); font-weight: 600; font-size: .9rem;
  transition: color .18s, background .18s;
}
.nav-item:hover { color: var(--color-primary); background: rgba(24, 84, 79, .07); }
.nav-item.active { color: var(--color-primary); background: rgba(24, 84, 79, .09); font-weight: 800; }
.nav-item.active::after {
  content: ""; display: block; width: 18px; height: 2px;
  background: var(--color-accent); border-radius: 99px; margin: 4px auto 0;
}
.header-inner .btn-header { margin-left: auto; }

/* Page cover */
.page-cover {
  position: relative; color: #F6F3ED; overflow: hidden;
  padding: 88px 0 84px;
  background: linear-gradient(135deg, var(--color-primary-ink), var(--color-primary-deep));
}
.page-cover::before {
  content: ""; position: absolute; inset: 0; opacity: .18;
  background-image: url("/assets/images/backpic/back-1.png");
  background-size: cover; background-position: center;
}
.page-cover::after {
  content: ""; position: absolute; inset: auto 0 0 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(246, 243, 237, .55), transparent);
}
.page-cover .grid-container { position: relative; z-index: 2; text-align: center; }
.breadcrumb {
  display: flex; justify-content: center; align-items: center; gap: .45rem;
  font-size: .875rem; margin-bottom: 1.75rem;
  color: rgba(246, 243, 237, .72);
}
.breadcrumb a { color: rgba(246, 243, 237, .85); }
.breadcrumb a:hover { color: #fff; text-decoration: underline; }
.breadcrumb [aria-current] { color: #fff; font-weight: 700; }
.page-cover h1 {
  font-size: clamp(2rem, 4.6vw, 3.4rem);
  line-height: 1.22; font-weight: 800; color: #fff;
  letter-spacing: .01em;
}
.page-cover .lead {
  max-width: 46rem; margin: 1.1rem auto 0;
  color: rgba(246, 243, 237, .82);
  font-size: 1.0625rem; line-height: 1.8;
}
.cover-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: .9rem; margin-top: 2rem; }

/* Stats strip */
.stats-band { background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat-item {
  padding: 2rem 1.25rem;
  border-left: 1px solid var(--color-border);
  text-align: center;
}
.stat-item:first-child { border-left: 0; }
.stat-number { font-size: 2rem; font-weight: 800; color: var(--color-primary); line-height: 1.2; letter-spacing: -.02em; }
.stat-label { color: var(--color-text-secondary); font-size: .85rem; margin-top: .25rem; }

/* Section spacing */
.section { padding: 88px 0; }
.section-soft { background: var(--color-surface); }
.section-bg { background: var(--color-bg); }
.section-head { margin-bottom: 2.5rem; max-width: 820px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: .5rem;
  color: var(--color-primary); font-weight: 800; font-size: .8125rem;
  letter-spacing: .08em; margin-bottom: .7rem;
}
.eyebrow::before { content: ""; width: 22px; height: 3px; border-radius: 99px; background: var(--color-accent); }
.section-head h2, .cta-band h2 { font-size: clamp(1.5rem, 3.2vw, 2.25rem); line-height: 1.35; color: var(--color-primary-ink); font-weight: 800; }
.section-head .section-desc { margin-top: .8rem; color: var(--color-text-secondary); font-size: .975rem; max-width: 70ch; }
.center .section-desc { margin-left:auto; margin-right:auto; }

/* Topic three cards */
.topic-col { margin-bottom: 1.5rem; }
.topic-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); overflow: hidden; height: 100%;
  box-shadow: var(--shadow-card); transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
  display: flex; flex-direction: column;
}
.topic-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); border-color: var(--color-border-strong); }
.topic-media { aspect-ratio: 4 / 3; overflow: hidden; background: #ede8df; }
.topic-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.topic-card:hover .topic-media img { transform: scale(1.04); }
.topic-body { padding: 1.4rem 1.4rem 1.6rem; display: flex; flex-direction: column; flex: 1; }
.topic-body h3 { font-size: 1.16rem; font-weight: 700; color: var(--color-primary-ink); margin: .65rem 0 .5rem; }
.topic-body p { color: var(--color-text-secondary); font-size: .875rem; line-height: 1.7; }
.topic-link {
  margin-top: auto; padding-top: 1rem; display: inline-flex; align-items: center; gap: .35rem;
  color: var(--color-accent); font-weight: 800; font-size: .875rem;
}
.topic-link:hover { color: var(--color-accent-hover); gap: .6rem; }
.topic-link svg { transition: transform .2s; }

/* News split section */
.section-news { padding: 88px 0; }
.spotlight-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-card);
  display: flex; flex-direction: column;
}
.spotlight-media { aspect-ratio: 16 / 9; overflow: hidden; }
.spotlight-media img { width: 100%; height: 100%; object-fit: cover; }
.spotlight-body { padding: 1.4rem 1.5rem 1.7rem; flex: 1; }
.spotlight-body h3 { font-size: 1.3rem; line-height: 1.45; font-weight: 800; margin: .7rem 0 .6rem; }
.spotlight-body h3 a:hover { color: var(--color-primary); }
.spotlight-body p { color: var(--color-text-secondary); font-size: .9rem; line-height: 1.75; }
.meta-row { display: flex; align-items: center; gap: .8rem; margin-top: 1rem; flex-wrap: wrap; color: var(--color-text-secondary); font-size: .85rem; }
.badge {
  display: inline-flex; align-items: center;
  background: rgba(24, 84, 79, .10); color: var(--color-primary);
  border-radius: 999px; font-size: .73rem; font-weight: 800; padding: .28rem .72rem;
}
.badge.warm { background: rgba(191, 98, 61, .11); color: var(--color-accent); }

.date-item {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 1rem 1.1rem;
  margin-top: .85rem; display: flex; align-items: flex-start; gap: 1rem;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.date-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); border-color: var(--color-border-strong); }
.date-item time {
  width: 88px; flex-shrink: 0; font-size: .8rem; font-weight: 700; color: var(--color-text-secondary);
  padding-top: .3rem; letter-spacing: .02em; font-variant-numeric: tabular-nums;
}
.date-content { min-width: 0; flex: 1; }
.date-content h4 { font-size: .95rem; line-height: 1.6; font-weight: 700; color: var(--color-primary-ink); }
.date-content h4 a:hover { color: var(--color-primary); text-decoration: underline; text-underline-offset: 4px; }
.date-content .badge { margin-bottom: .35rem; }
.arrow-link { width: 32px; height: 32px; flex-shrink: 0; border-radius: 50%; display: flex; align-items: center; justify-content: center; border: 1px solid var(--color-border); color: var(--color-primary); transition: all .18s ease; }
.date-item:hover .arrow-link { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* Sidebar */
.sidebar { display: flex; flex-direction: column; gap: 1.5rem; }
.side-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 1.5rem 1.4rem;
  box-shadow: var(--shadow-card);
}
.side-card .side-title { font-size: 1.02rem; font-weight: 800; color: var(--color-primary-ink); margin-bottom: 1.1rem; display: flex; align-items: center; gap: .45rem; }
.side-title::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--color-accent); }
.rank-list { counter-reset: rank; }
.rank-item + .rank-item { border-top: 1px solid var(--color-border); }
.rank-item { counter-increment: rank; }
.rank-item a { display: flex; gap: .75rem; padding: .8rem 0; font-size: .875rem; line-height: 1.55; font-weight: 600; color: var(--color-text); }
.rank-item a:hover { color: var(--color-primary); }
.rank-item a:hover span:last-child { text-decoration: underline; text-underline-offset: 3px; }
.rank-num { color: var(--color-accent); font-weight: 800; font-variant-numeric: tabular-nums; flex-shrink: 0; }
.contact-card .contact-line { display: flex; gap: .6rem; align-items: flex-start; margin-top: .65rem; color: var(--color-text-secondary); font-size: .85rem; line-height: 1.55; }
.contact-card .contact-line svg { flex-shrink: 0; margin-top: .2rem; }
.contact-card .btn { margin-top: 1.3rem; width: 100%; }
.btn-primary-sm { background: var(--color-primary); color: #fff; min-height: 42px; padding: 0 1.2rem; font-size: .88rem; }
.btn-primary-sm:hover { background: var(--color-primary-deep); }

/* Deep theme band */
.theme-band { background: var(--color-primary-ink); color: #F6F3ED; position: relative; overflow: hidden; }
.theme-band::before {
  content: ""; position: absolute; inset: 0; opacity: .24;
  background-image: url("/assets/images/backpic/back-3.png");
  background-size: cover; background-position: center;
}
.theme-band .grid-container { position: relative; z-index: 2; padding-top: 76px; padding-bottom: 76px; }
.theme-band .section-head h2 { color: #fff; }
.theme-band .lead-text { color: rgba(246, 243, 237, .82); max-width: 62ch; }
.theme-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 2.5rem; }
.theme-nav-item {
  background: rgba(246, 243, 237, .06); border: 1px solid rgba(246, 243, 237, .16);
  border-radius: var(--radius-md); padding: 1.4rem 1.3rem;
  transition: background .2s ease, transform .2s ease;
}
.theme-nav-item:hover { background: rgba(246, 243, 237, .13); transform: translateY(-3px); }
.theme-nav-item h3 { color: #fff; font-size: 1.05rem; font-weight: 800; }
.theme-nav-item p { color: rgba(246, 243, 237, .75); font-size: .85rem; margin-top: .4rem; }

/* FAQ */
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: .6rem 1.2rem;
  margin-bottom: .9rem;
}
.faq-item summary {
  display: flex; justify-content: space-between; align-items: center; cursor: pointer;
  padding: .8rem 0; font-weight: 700; color: var(--color-primary-ink); font-size: 1rem;
  list-style: none; gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.35rem; color: var(--color-accent); font-weight: 700; transition: transform .18s ease; flex-shrink: 0; }
.faq-item[open] summary { color: var(--color-primary); }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-body { color: var(--color-text-secondary); font-size: .92rem; line-height: 1.8; padding-bottom: 1.2rem; max-width: 680px; }

/* Download CTA */
.cta-download-band { background: var(--color-primary-deep); color: #F6F3ED; text-align: center; padding: 76px 0 80px; position: relative; overflow: hidden; }
.cta-download-band::before {
  content: ""; position: absolute; inset: 0; opacity: .16;
  background-image: url("/assets/images/backpic/back-2.webp");
  background-position: center; background-size: cover;
}
.cta-download-band .grid-container { position: relative; z-index: 2; }
.cta-download-band h2 { color: #fff; }
.cta-download-band p { color: rgba(246, 243, 237, .78); max-width: 52ch; margin: .9rem auto 0; }
.download-btn-group { display: flex; justify-content: center; flex-wrap: wrap; gap: 1rem; margin-top: 2.2rem; }
.download-btn {
  display: inline-flex; align-items: center; gap: .6rem;
  background: #fff; color: var(--color-primary-ink);
  padding: .75rem 1.3rem; border-radius: 14px;
  font-weight: 800; font-size: .92rem;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
  box-shadow: 0 2px 4px rgba(0,0,0,.1);
}
.download-btn small { display: block; font-weight: 500; color: var(--color-text-secondary); font-size: .75rem; line-height: 1; }
.download-btn:hover { transform: translateY(-3px); box-shadow: 0 14px 24px rgba(0,0,0,.16); background:#fffdf7; }
.download-btn svg { width: 26px; height: 26px; flex-shrink: 0; }

/* Footer */
.site-footer { background: var(--color-primary-ink); color: rgba(246,243,237,.75); }
.site-footer .container { padding-top: 60px; padding-bottom: 30px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 2rem; }
.footer-brand .footer-logo { display: inline-flex; align-items: center; gap: .5rem; color: #fff; font-size: 1.1rem; font-weight: 800; }
.footer-brand p { margin-top: 1rem; font-size: .85rem; line-height: 1.8; max-width: 36ch; color: rgba(246,243,237,.65); }
.footer-col h4 { color: #fff; font-size: .95rem; font-weight: 700; margin-bottom: 1rem; }
.footer-col ul li { margin-bottom: .55rem; }
.footer-col a { color: rgba(246,243,237,.72); font-size: .87rem; transition: color .16s ease; }
.footer-col a:hover { color: #fff; text-decoration: underline; text-underline-offset: 3px; }
.footer-contacts p { display: flex; align-items: flex-start; gap: .55rem; margin-bottom: .65rem; font-size: .84rem; color: rgba(246,243,237,.68); }
.footer-contacts svg { flex-shrink: 0; margin-top: .2rem; }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; border-top: 1px solid rgba(246,243,237,.14); margin-top: 2.6rem; padding-top: 1.5rem; font-size: .78rem; color: rgba(246,243,237,.55); }

/* Bottom tab */
.bottom-tab {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 90;
  display: none;
  height: calc(64px + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  background: #fff; border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 16px rgba(23,51,49,.05);
}
.bottom-item { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px; color: var(--color-text-secondary); font-size: .68rem; font-weight: 600; transition: color .16s ease; }
.bottom-item svg { width: 22px; height: 22px; }
.bottom-item.active { color: var(--color-primary); font-weight: 800; }

/* Mobile & Responsive */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem 1.5rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item { border-left: 0; border-top: 1px solid var(--color-border); }
  .stat-item:nth-child(-n+2) { border-top: 0; }
}
@media (max-width: 768px) {
  .site-header .main-nav { display: none; }
  .header-inner { min-height: 60px; }
  .btn-header { min-height: 36px; padding: 0 .9rem; font-size: .8rem; }
  body { padding-bottom: calc(72px + env(safe-area-inset-bottom)); }
  .bottom-tab { display: flex; }
  .page-cover { padding: 58px 0 56px; }
  .page-cover h1 { font-size: 2rem; }
  .page-cover .lead { font-size: .96rem; }
  .section { padding: 56px 0; }
  .section-news { padding: 56px 0; }
  .topic-body h3 { font-size: 1.05rem; }
  .theme-nav { grid-template-columns: 1fr; }
  .date-item { flex-wrap: wrap; }
  .date-item time { width: 100%; padding-bottom: .2rem; }
  .download-btn-group { flex-direction: column; align-items: center; }
  .download-btn { width: 100%; max-width: 360px; }
}
@media (max-width: 575px) {
  .brand-text { font-size: 1rem; }
  .container, .grid-container { padding-left: 1rem; padding-right: 1rem; }
  .btn-header { display: none; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item { padding: 1.4rem .8rem; }
  .stat-number { font-size: 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.8rem; padding-bottom: .5rem; }
}

/* Foundation-only minimal grid alignment for the article split */
.split-main .news-list-area { margin-bottom: 1.5rem; }

/* roulang page: category4 */
:root {
  --color-bg:#F6F3ED;
  --color-surface:#FFFFFF;
  --color-primary:#18544F;
  --color-primary-deep:#0D3A37;
  --color-primary-ink:#0A2B29;
  --color-accent:#BF623D;
  --color-accent-hover:#A24D2C;
  --color-text:#173331;
  --color-text-secondary:#5A6B68;
  --color-border:#E5DFD1;
  --color-border-strong:#C9C0AE;
  --color-success:#2E7D62;
  --color-error:#B44038;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-full:999px;
  --shadow-sm:0 1px 2px rgba(23,51,49,.04), 0 8px 20px rgba(23,51,49,.05);
  --shadow-lg:0 12px 28px rgba(23,51,49,.10);
}

*, *::before, *::after { box-sizing:border-box; }
html { scroll-behavior:smooth; }

body {
  margin:0;
  background:var(--color-bg);
  color:var(--color-text);
  font-family:system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}

img { max-width:100%; display:block; }
a { color:inherit; text-decoration:none; }
ul, ol, p, h1, h2, h3, h4 { margin:0; padding:0; }
button, input { font:inherit; }
.container { max-width:1200px; margin:0 auto; padding-left:20px; padding-right:20px; }

.btn-primary,
.btn-outline {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--radius-full);
  font-size:0.9375rem;
  font-weight:700;
  line-height:1;
  border:1.5px solid transparent;
  transition:transform .2s ease, background .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.btn-primary {
  background:var(--color-accent);
  color:#fff;
}
.btn-primary:hover {
  background:var(--color-accent-hover);
  transform:translateY(-2px);
  box-shadow:var(--shadow-sm);
}
.btn-primary:focus-visible,
.btn-outline:focus-visible {
  outline:3px solid rgba(191,98,61,.28);
  outline-offset:2px;
}
.btn-outline {
  border-color:var(--color-primary);
  color:var(--color-primary);
  background:transparent;
}
.btn-outline:hover {
  background:rgba(24,84,79,.08);
}
.btn-light {
  background:#F6F3ED;
  color:var(--color-primary-deep);
}
.btn-light:hover {
  background:#fff;
}

.site-header {
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,243,237,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--color-border);
}
.header-inner {
  height:72px;
  display:flex;
  align-items:center;
  gap:20px;
}
.site-logo {
  display:inline-flex;
  align-items:center;
  gap:9px;
  flex-shrink:0;
}
.brand-mark {
  width:36px;
  height:36px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:var(--color-primary);
  color:#fff;
  border-radius:11px;
  box-shadow:0 6px 14px rgba(24,84,79,.18);
}
.brand-text {
  display:flex;
  align-items:baseline;
  gap:2px;
  font-size:1.12rem;
  font-weight:800;
  color:var(--color-text);
}
.brand-text small {
  font-weight:700;
  font-size:.75rem;
  color:var(--color-primary);
}

.main-nav {
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:8px;
  flex:1;
}
.nav-item {
  position:relative;
  display:inline-block;
  padding:9px 15px;
  border-radius:8px;
  font-size:.9375rem;
  font-weight:600;
  color:var(--color-text);
  transition:color .2s ease, background .2s ease, box-shadow .2s ease;
}
.nav-item:hover {
  color:var(--color-primary);
  background:rgba(24,84,79,.06);
}
.nav-item.active {
  color:var(--color-primary);
  font-weight:700;
  box-shadow:0 3px 0 var(--color-primary);
}
.nav-item:focus-visible {
  outline:2px solid var(--color-primary);
  outline-offset:2px;
}
.header-cta {
  flex-shrink:0;
  height:42px;
  padding:0 20px;
  font-size:.875rem;
  border-radius:var(--radius-full);
}
.header-cta svg {
  width:17px;
  height:17px;
  stroke-width:2.1;
}

.tabbar {
  display:none;
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:100;
  background:var(--color-surface);
  border-top:1px solid var(--color-border);
  box-shadow:0 -6px 18px rgba(23,51,49,.05);
}
.tabbar-item {
  flex:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  min-height:56px;
  color:var(--color-text-secondary);
  font-size:.6875rem;
  font-weight:600;
  transition:color .2s ease;
}
.tabbar-item svg {
  width:22px;
  height:22px;
  stroke-width:1.8;
  fill:none;
  stroke:currentColor;
}
.tabbar-item.active {
  color:var(--color-primary);
  font-weight:700;
}
.tabbar-item:focus-visible {
  outline:2px solid var(--color-primary);
  outline-offset:-4px;
}

.page-hero {
  position:relative;
  background:linear-gradient(115deg, rgba(10,43,41,.94), rgba(13,58,55,.72), rgba(13,58,55,.42)), url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  color:#fff;
  padding:88px 0 86px;
  border-bottom:1px solid var(--color-primary-deep);
}
.page-hero .container { position:relative; z-index:1; }
.breadcrumb {
  display:flex;
  align-items:center;
  gap:6px;
  font-size:.875rem;
  color:rgba(255,255,255,.74);
  margin-bottom:32px;
}
.breadcrumb a { color:rgba(255,255,255,.8); }
.breadcrumb a:hover { text-decoration:underline; }
.breadcrumb-sep { color:rgba(255,255,255,.4); }
.breadcrumb [aria-current="page"] { color:#fff; }

.page-eyebrow {
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:#F3E3CF;
  font-size:.8125rem;
  font-weight:700;
  letter-spacing:.05em;
  margin-bottom:14px;
}
.page-eyebrow::before {
  content:"";
  width:20px;
  height:2px;
  background:var(--color-accent);
}
.page-hero h1 {
  font-size:clamp(2rem, 4.3vw, 3.1rem);
  line-height:1.2;
  font-weight:800;
  max-width:760px;
  letter-spacing:-.01em;
  margin-bottom:14px;
}
.hero-subtitle {
  max-width:680px;
  color:rgba(255,255,255,.84);
  font-size:1.0625rem;
  line-height:1.8;
}

.section {
  padding:96px 0;
}
.section-surface {
  background:var(--color-surface);
  border-top:1px solid var(--color-border);
  border-bottom:1px solid var(--color-border);
}
.section-soft {
  background:#EFEAE0;
}
.section-head {
  max-width:740px;
  margin-bottom:44px;
}
.eyebrow {
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:.75rem;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--color-primary);
  text-transform:uppercase;
}
.eyebrow::before {
  content:"";
  width:18px;
  height:2px;
  background:var(--color-primary);
}
.eyebrow-light { color:#F6C8AE; }
.eyebrow-light::before { background:#F6C8AE; }
.section-title {
  margin:10px 0 12px;
  font-size:clamp(1.5rem, 3vw, 2.15rem);
  line-height:1.25;
  font-weight:800;
  color:var(--color-text);
  letter-spacing:-.01em;
}
.section-desc {
  color:var(--color-text-secondary);
  font-size:1rem;
  line-height:1.8;
}

.help-card-grid {
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:24px;
}
.help-card {
  position:relative;
  display:block;
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius-lg);
  padding:30px 22px 22px;
  box-shadow:var(--shadow-sm);
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.help-card:hover {
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
  border-color:var(--color-border-strong);
}
.help-card:focus-visible {
  outline:3px solid rgba(24,84,79,.25);
  outline-offset:2px;
}
.help-icon {
  width:46px;
  height:46px;
  background:#F2EEE5;
  color:var(--color-primary);
  border-radius:12px;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:18px;
}
.help-icon svg {
  width:23px;
  height:23px;
  stroke:currentColor;
  fill:none;
  stroke-width:1.7;
  stroke-linecap:round;
  stroke-linejoin:round;
}
.help-card h3 {
  font-size:1.12rem;
  font-weight:700;
  color:var(--color-text);
  margin-bottom:8px;
}
.help-card p {
  font-size:.875rem;
  color:var(--color-text-secondary);
  margin-bottom:20px;
  line-height:1.7;
}
.help-link {
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--color-primary);
  font-size:.8125rem;
  font-weight:700;
}
.help-link svg {
  width:15px;
  height:15px;
  stroke:currentColor;
  fill:none;
  stroke-width:2;
  transition:transform .2s;
}
.help-card:hover .help-link svg { transform:translateX(3px); }

.helper-layout {
  align-items:stretch;
}
.faq-panel {
  background:var(--color-bg);
  border:1px solid var(--color-border);
  border-radius:var(--radius-lg);
  padding:10px 28px 20px;
  box-shadow:var(--shadow-sm);
  height:100%;
}
.faq-intro {
  padding:22px 0 8px;
  font-size:.875rem;
  color:var(--color-text-secondary);
  border-bottom:1px solid var(--color-border);
}
.faq-accordion {
  background:transparent;
  border:0;
}
.accordion-item {
  background:transparent;
  border:0;
  border-bottom:1px solid var(--color-border);
}
.accordion-item:last-child { border-bottom:0; }
.accordion-title {
  position:relative;
  display:block;
  padding:22px 48px 20px 0;
  border:0;
  border-radius:0;
  height:auto;
  background:transparent;
  color:var(--color-text);
  font-size:1rem;
  font-weight:600;
  line-height:1.55;
  transition:color .2s ease, padding-left .2s ease;
}
.accordion-title:hover,
.accordion-title:focus {
  background:transparent;
  color:var(--color-primary);
  padding-left:2px;
}
.accordion-title::after {
  content:"+";
  position:absolute;
  right:0;
  top:18px;
  width:28px;
  height:28px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(24,84,79,.08);
  color:var(--color-primary);
  border-radius:50%;
  font-size:1.125rem;
  font-weight:700;
  line-height:1;
  transition:transform .2s ease, background .2s ease;
}
.accordion-item.is-active > .accordion-title::after {
  content:"–";
  transform:rotate(180deg);
  background:var(--color-primary);
  color:#fff;
}
.accordion-content {
  background:transparent;
  border:0;
  max-width:680px;
  padding:0 0 24px;
  font-size:.9375rem;
  color:var(--color-text-secondary);
  line-height:1.8;
}
.accordion-content p + p { margin-top:8px; }

.aside-col {
  display:flex;
  flex-direction:column;
  gap:24px;
}
.contact-card,
.download-mini {
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
  padding:26px;
}
.contact-card .card-kicker {
  color:var(--color-primary);
  font-size:.75rem;
  font-weight:700;
  letter-spacing:.05em;
  margin-bottom:6px;
}
.contact-card h3 {
  font-size:1.2rem;
  font-weight:800;
  margin-bottom:16px;
  color:var(--color-text);
}
.contact-line {
  display:flex;
  gap:11px;
  color:var(--color-text-secondary);
  font-size:.875rem;
  line-height:1.7;
}
.contact-line + .contact-line { margin-top:13px; }
.contact-line svg {
  width:16px;
  height:16px;
  flex:0 0 auto;
  margin-top:3px;
  stroke:var(--color-primary);
  fill:none;
  stroke-width:1.8;
  stroke-linecap:round;
  stroke-linejoin:round;
}
.contact-line strong {
  color:var(--color-text);
  font-weight:700;
}

.download-mini {
  background:linear-gradient(145deg, var(--color-primary-deep), var(--color-primary-ink));
  border:1px solid rgba(255,255,255,.08);
  color:#fff;
}
.download-mini h3 {
  font-size:1.25rem;
  font-weight:700;
  color:#fff;
  margin-bottom:10px;
}
.download-mini p {
  color:rgba(255,255,255,.72);
  font-size:.875rem;
  line-height:1.7;
  margin-bottom:20px;
}
.platform-row {
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.platform-pill {
  display:inline-flex;
  align-items:center;
  gap:7px;
  border:1px solid rgba(255,255,255,.18);
  border-radius:10px;
  padding:8px 15px;
  color:#fff;
  font-size:.8125rem;
  font-weight:600;
  transition:background .2s ease, border-color .2s ease;
}
.platform-pill svg {
  width:16px;
  height:16px;
  stroke:currentColor;
  fill:none;
  stroke-width:1.7;
}
.platform-pill:hover {
  background:rgba(255,255,255,.12);
  border-color:rgba(255,255,255,.42);
}

.guide-section { background:var(--color-bg); }
.guide-layout {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
}
.guide-media {
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-lg);
  border:1px solid var(--color-border);
  background:var(--color-surface);
}
.guide-media img {
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
}
.guide-steps {
  list-style:none;
  counter-reset:step;
}
.guide-steps li {
  position:relative;
  counter-increment:step;
  padding:0 0 28px 62px;
}
.guide-steps li:last-child { padding-bottom:0; }
.guide-steps li::before {
  content:counter(step, decimal-leading-zero);
  position:absolute;
  left:0;
  top:-2px;
  width:42px;
  height:42px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--color-surface);
  border:1px solid var(--color-border-strong);
  border-radius:13px;
  color:var(--color-primary);
  font-weight:800;
  font-size:.875rem;
  box-shadow:var(--shadow-sm);
}
.guide-steps h3 {
  font-size:1.1rem;
  font-weight:700;
  color:var(--color-text);
  margin-bottom:8px;
}
.guide-steps p {
  color:var(--color-text-secondary);
  font-size:.9375rem;
  line-height:1.8;
  max-width:520px;
}

.cta-help {
  padding-top:80px;
  padding-bottom:88px;
}
.cta-panel {
  background:var(--color-primary-deep);
  border-radius:20px;
  padding:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  box-shadow:0 22px 42px rgba(10,43,41,.18);
  border:1px solid rgba(255,255,255,.06);
}
.cta-panel h2 {
  color:#fff;
  font-size:clamp(1.6rem, 3vw, 2.3rem);
  font-weight:800;
  line-height:1.25;
  margin:14px 0 12px;
}
.cta-panel .cta-copy {
  max-width:620px;
  color:rgba(255,255,255,.78);
  font-size:1rem;
  line-height:1.8;
}
.cta-actions {
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  flex-shrink:0;
}

.site-footer {
  background:var(--color-primary-deep);
  color:#EFE9DA;
  padding:72px 0 28px;
}
.site-footer .container { max-width:1200px; }
.footer-grid {
  display:grid;
  grid-template-columns:1.7fr .9fr .9fr 1.2fr;
  gap:48px;
}
.footer-brand .footer-logo {
  display:flex;
  align-items:center;
  gap:10px;
  font-size:1.15rem;
  font-weight:800;
  color:#fff;
  margin-bottom:16px;
}
.footer-logo .brand-mark {
  background:var(--color-accent);
  color:#fff;
  width:32px;
  height:32px;
  border-radius:9px;
}
.footer-brand p {
  color:rgba(255,255,255,.64);
  font-size:.875rem;
  line-height:1.9;
  max-width:340px;
}
.footer-col h4 {
  font-size:.75rem;
  font-weight:700;
  letter-spacing:.05em;
  color:rgba(255,255,255,.6);
  margin-bottom:16px;
  text-transform:uppercase;
}
.footer-col ul { list-style:none; }
.footer-col li { margin-bottom:8px; }
.footer-col a {
  color:rgba(255,255,255,.78);
  font-size:.875rem;
  transition:color .2s ease, padding-left .2s ease;
}
.footer-col a:hover {
  color:#fff;
  padding-left:2px;
}
.footer-contacts p {
  display:flex;
  gap:8px;
  color:rgba(255,255,255,.72);
  font-size:.875rem;
  line-height:1.7;
  margin-bottom:10px;
}
.footer-contacts svg {
  width:15px;
  height:15px;
  flex:0 0 auto;
  margin-top:4px;
  stroke:currentColor;
  fill:none;
  stroke-width:1.7;
}
.footer-bottom {
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:8px;
  border-top:1px solid rgba(255,255,255,.12);
  margin-top:52px;
  padding-top:20px;
  color:rgba(255,255,255,.46);
  font-size:.8125rem;
}

@media (max-width:1023px) {
  .section { padding:72px 0; }
  .container { padding-left:24px; padding-right:24px; }
  .help-card-grid { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }
  .footer-brand { grid-column:span 2; }
  .guide-layout { gap:28px; }
  .cta-panel { flex-direction:column; align-items:flex-start; padding:44px; }
}

@media (max-width:767px) {
  body { padding-bottom:calc(68px + env(safe-area-inset-bottom)); }
  .container { padding-left:16px; padding-right:16px; }
  .site-header { height:64px; }
  .header-inner { height:64px; gap:8px; }
  .main-nav,
  .header-cta .cta-label { display:none; }
  .brand-mark { width:32px; height:32px; border-radius:9px; }
  .brand-text { font-size:1rem; }
  .brand-text small { display:none; }
  .header-cta {
    width:42px;
    height:42px;
    padding:0;
    justify-content:center;
    border-radius:50%;
  }
  .header-cta svg { width:19px; height:19px; }
  .tabbar {
    display:flex;
    align-items:stretch;
    height:calc(62px + env(safe-area-inset-bottom));
    padding-bottom:env(safe-area-inset-bottom);
  }
  .page-hero { padding:52px 0 56px; }
  .page-hero h1 { font-size:2rem; }
  .breadcrumb { margin-bottom:24px; }
  .section { padding:56px 0; }
  .section-head { margin-bottom:28px; }
  .help-card-grid { grid-template-columns:1fr; }
  .help-card { padding:22px 18px; }
  .faq-panel { padding:8px 18px 16px; }
  .accordion-title { font-size:.9375rem; }
  .guide-layout { grid-template-columns:1fr; }
  .guide-media { order:-1; }
  .cta-panel { padding:30px 24px; }
  .cta-actions .btn-primary,
  .cta-actions .btn-outline { width:100%; }
  .footer-grid { grid-template-columns:1fr; gap:26px; }
  .footer-brand { grid-column:auto; }
  .footer-bottom { margin-top:36px; flex-direction:column; }
}

@media (max-width:575px) {
  .header-cta { display:inline-flex; }
  .brand-mark { width:30px; height:30px; }
  .platform-row { flex-direction:column; align-items:stretch; }
  .platform-pill { justify-content:center; }
}