/* roulang page: index */
:root {
  --color-bg: oklch(97% 0.012 60);
  --color-surface: oklch(99% 0.006 60);
  --color-border: oklch(88% 0.018 60);
  --color-accent: oklch(64% 0.16 32);
  --color-accent-dark: oklch(56% 0.16 32);
  --color-accent-soft: oklch(92% 0.06 32);
  --color-teal: oklch(54% 0.12 195);
  --color-teal-soft: oklch(93% 0.05 195);
  --color-text: oklch(18% 0.02 60);
  --color-muted: oklch(52% 0.02 60);
  --color-step-bg: oklch(90% 0.08 32);
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-chip: 999px;
  --shadow-card: 0 2px 8px oklch(18% 0.02 60 / 0.08);
  --shadow-card-hover: 0 6px 20px oklch(18% 0.02 60 / 0.14);
  --shadow-float: 0 8px 32px oklch(18% 0.02 60 / 0.18);
  --transition: 180ms ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; }

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── HEADER ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 4px oklch(18% 0.02 60 / 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

.site-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-accent);
  white-space: nowrap;
  flex-shrink: 0;
}

.site-logo span { color: var(--color-teal); }

.nav-tabs {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  justify-content: center;
}

.nav-tab {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 16px;
  border-radius: var(--radius-chip);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.nav-tab:hover { border-color: var(--color-accent); color: var(--color-accent); }
.nav-tab.active { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.nav-tab:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

.nav-cta {
  display: inline-flex;
  align-items: center;
  height: 38px;
  padding: 0 20px;
  border-radius: var(--radius-btn);
  background: var(--color-accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border: none;
  transition: background var(--transition), transform var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-cta:hover { background: var(--color-accent-dark); }
.nav-cta:active { transform: scale(0.98); }
.nav-cta:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 24px;
  z-index: 99;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow-float);
}

.mobile-menu.open { display: flex; }
.mobile-menu .nav-tab { justify-content: center; }
.mobile-menu .nav-cta { justify-content: center; }

/* ── HERO ── */
.hero {
  min-height: 560px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-accent-soft) 0%, var(--color-teal-soft) 100%);
  position: relative;
  overflow: hidden;
  padding: 64px 0;
}

.hero::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: oklch(88% 0.08 32 / 0.3);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -60px;
  left: 10%;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: oklch(90% 0.06 195 / 0.25);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 55% 45%;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text h1 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  margin-bottom: 16px;
}

.hero-text .hero-sub {
  font-size: 18px;
  color: var(--color-muted);
  margin-bottom: 32px;
  max-width: 480px;
}

.hero-btns {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  background: var(--color-accent);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  border: none;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 2px 8px oklch(64% 0.16 32 / 0.3);
}

.btn-primary:hover { background: var(--color-accent-dark); box-shadow: 0 4px 16px oklch(64% 0.16 32 / 0.4); }
.btn-primary:active { transform: scale(0.98); }
.btn-primary:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-outline-teal {
  display: inline-flex;
  align-items: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  background: transparent;
  color: var(--color-teal);
  font-size: 16px;
  font-weight: 600;
  border: 2px solid var(--color-teal);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.btn-outline-teal:hover { background: var(--color-teal-soft); }
.btn-outline-teal:active { transform: scale(0.98); }
.btn-outline-teal:focus-visible { outline: 2px solid var(--color-teal); outline-offset: 2px; }

.hero-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  padding: 20px;
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: box-shadow var(--transition), transform var(--transition);
}

.step-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-step-bg);
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

.step-content h3 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.step-content p { font-size: 13px; color: var(--color-muted); line-height: 1.5; }

/* ── SECTIONS ── */
section { padding: 64px 0; }

.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 32px;
  max-width: 560px;
}

/* ── SCROLL MATRIX ── */
.scroll-section { background: var(--color-surface); }

.scroll-track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 8px;
}

.scroll-track::-webkit-scrollbar { display: none; }

.matrix-card {
  flex-shrink: 0;
  width: 240px;
  height: 160px;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px;
  cursor: pointer;
  transition: box-shadow var(--transition), transform var(--transition);
  text-decoration: none;
  color: var(--color-text);
}

.matrix-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.matrix-card:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.matrix-card.accent { background: var(--color-accent-soft); }
.matrix-card.teal { background: var(--color-teal-soft); }

.matrix-card-label {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.matrix-card.teal .matrix-card-label { color: var(--color-teal); }

.matrix-card-desc { font-size: 13px; color: var(--color-muted); line-height: 1.4; }

/* ── FEATURED GRID ── */
.featured-section { background: var(--color-accent-soft); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.content-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.content-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }

.card-chip {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 10px;
  border-radius: var(--radius-chip);
  font-size: 12px;
  font-weight: 600;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  align-self: flex-start;
}

.card-chip.teal { background: var(--color-teal-soft); color: var(--color-teal); }

.content-card h3 {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}

.content-card p {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.5;
  flex: 1;
}

.card-link {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition);
}

.card-link:hover { gap: 8px; }

/* ── CATEGORY SPLIT ── */
.category-section { background: var(--color-bg); }

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

.category-col {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.category-col h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-border);
}

.category-col.accent h2 { border-color: var(--color-accent); color: var(--color-accent); }
.category-col.teal h2 { border-color: var(--color-teal); color: var(--color-teal); }

.step-list { list-style: none; display: flex; flex-direction: column; gap: 16px; margin-bottom: 24px; }

.step-list-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.step-list-item .step-num { flex-shrink: 0; }

.step-list-item h4 { font-size: 14px; font-weight: 600; margin-bottom: 2px; }
.step-list-item p { font-size: 13px; color: var(--color-muted); line-height: 1.5; }

.btn-outline {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 20px;
  border-radius: var(--radius-btn);
  background: transparent;
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 600;
  border: 1.5px solid var(--color-accent);
  transition: background var(--transition), color var(--transition);
}

.btn-outline:hover { background: var(--color-accent-soft); }
.btn-outline.teal { color: var(--color-teal); border-color: var(--color-teal); }
.btn-outline.teal:hover { background: var(--color-teal-soft); }

/* ── FAQ ── */
.faq-section { background: var(--color-teal-soft); }

.faq-list { display: flex; flex-direction: column; gap: 8px; max-width: 800px; }

details.faq-item {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

details.faq-item summary {
  list-style: none;
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  user-select: none;
}

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

details.faq-item summary::after {
  content: '›';
  font-size: 20px;
  color: var(--color-accent);
  transform: rotate(90deg);
  transition: transform 200ms ease;
  flex-shrink: 0;
}

details.faq-item[open] summary::after { transform: rotate(270deg); }

details.faq-item summary:focus-visible { outline: 2px solid var(--color-accent); outline-offset: -2px; }

.faq-body {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  background: var(--color-bg);
}

/* ── CTA ── */
.cta-section {
  background: var(--color-accent);
  padding: 64px 0;
  text-align: center;
}

.cta-section h2 {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.cta-section p {
  font-size: 16px;
  color: oklch(99% 0.006 60 / 0.8);
  margin-bottom: 32px;
}

.btn-white {
  display: inline-flex;
  align-items: center;
  height: 52px;
  padding: 0 36px;
  border-radius: var(--radius-btn);
  background: #fff;
  color: var(--color-accent);
  font-size: 16px;
  font-weight: 700;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 2px 12px oklch(18% 0.02 60 / 0.15);
}

.btn-white:hover { transform: scale(1.03); box-shadow: 0 6px 24px oklch(18% 0.02 60 / 0.2); }
.btn-white:active { transform: scale(0.98); }
.btn-white:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }

/* ── TIMELINE ── */
.timeline-section { background: var(--color-surface); }

.timeline { display: flex; flex-direction: column; gap: 0; max-width: 720px; }

.timeline-item {
  display: flex;
  gap: 20px;
  position: relative;
  padding-bottom: 28px;
}

.timeline-item:last-child { padding-bottom: 0; }

.timeline-line {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}

.timeline-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
  margin-top: 4px;
}

.timeline-connector {
  width: 2px;
  flex: 1;
  background: var(--color-border);
  margin-top: 4px;
}

.timeline-item:last-child .timeline-connector { display: none; }

.timeline-content h4 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.timeline-content p { font-size: 13px; color: var(--color-muted); line-height: 1.5; }
.timeline-tag {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 10px;
  border-radius: var(--radius-chip);
  font-size: 11px;
  font-weight: 600;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  margin-bottom: 6px;
}

/* ── GUARANTEE ── */
.guarantee-section { background: var(--color-bg); }

.guarantee-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.guarantee-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  box-shadow: var(--shadow-card);
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition);
}

.guarantee-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }

.guarantee-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 22px;
}

.guarantee-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.guarantee-card p { font-size: 13px; color: var(--color-muted); line-height: 1.6; }

/* ── NEWS ── */
.news-section { background: var(--color-accent-soft); }

.news-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}

.news-list { display: flex; flex-direction: column; gap: 0; }

.news-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

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

.news-index {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
  min-width: 28px;
  flex-shrink: 0;
  line-height: 1.4;
}

.news-item h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
  line-height: 1.4;
}

.news-item a:hover h4 { color: var(--color-accent); }

.news-item p { font-size: 13px; color: var(--color-muted); line-height: 1.5; }

.news-meta { font-size: 12px; color: var(--color-muted); margin-top: 4px; }

.news-sidebar { display: flex; flex-direction: column; gap: 20px; }

.sidebar-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.sidebar-card h3 { font-size: 15px; font-weight: 700; margin-bottom: 14px; color: var(--color-text); }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }

.tag {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 12px;
  border-radius: var(--radius-chip);
  font-size: 12px;
  font-weight: 500;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  cursor: pointer;
}

.tag:hover { background: var(--color-accent-soft); border-color: var(--color-accent); color: var(--color-accent); }

.sidebar-links { display: flex; flex-direction: column; gap: 8px; }

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  background: var(--color-bg);
  transition: background var(--transition), color var(--transition);
}

.sidebar-link:hover { background: var(--color-accent-soft); color: var(--color-accent); }
.sidebar-link .arrow { margin-left: auto; color: var(--color-muted); font-size: 16px; }

/* ── FOOTER ── */
.site-footer {
  background: var(--color-text);
  color: var(--color-bg);
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .footer-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-accent-soft);
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 13px;
  color: oklch(88% 0.018 60);
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-bg);
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}

.footer-links { list-style: none; display: flex; flex-direction: column; gap: 8px; }

.footer-links a {
  font-size: 13px;
  color: oklch(75% 0.015 60);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--color-accent-soft); }

.footer-bottom {
  border-top: 1px solid oklch(30% 0.02 60);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-bottom p { font-size: 12px; color: oklch(55% 0.015 60); }

/* ── REDUCED MOTION ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
  }
}

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .hero-text h1 { font-size: 34px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .guarantee-grid { grid-template-columns: repeat(2, 1fr); }
  .news-layout { grid-template-columns: 1fr; }
  .news-sidebar { display: grid; grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-tabs { display: none; }
  .nav-cta { display: none; }
  .hamburger { display: flex; }

  .hero-inner { grid-template-columns: 1fr; }
  .hero { min-height: 420px; padding: 40px 0; }
  .hero-text h1 { font-size: 28px; }
  .hero-steps { display: none; }

  .category-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .news-sidebar { grid-template-columns: 1fr; }
  .guarantee-grid { grid-template-columns: 1fr; }
  section { padding: 40px 0; }
}

@media (max-width: 520px) {
  .hero-text h1 { font-size: 24px; }
  .hero-btns { flex-direction: column; }
  .btn-primary, .btn-outline-teal { width: 100%; justify-content: center; }
  .card-grid { grid-template-columns: 1fr; }
  .cta-section h2 { font-size: 24px; }
  .section-title { font-size: 20px; }
}

/* roulang page: category2 */
:root {
  --color-bg: oklch(97% 0.012 60);
  --color-surface: oklch(99% 0.006 60);
  --color-border: oklch(88% 0.018 60);
  --color-accent: oklch(64% 0.16 32);
  --color-accent-dark: oklch(56% 0.16 32);
  --color-accent-soft: oklch(92% 0.06 32);
  --color-teal: oklch(54% 0.12 195);
  --color-teal-soft: oklch(93% 0.05 195);
  --color-text: oklch(18% 0.02 60);
  --color-muted: oklch(52% 0.02 60);
  --color-step-bg: oklch(90% 0.08 32);
  --shadow-card: 0 2px 8px oklch(18% 0.02 60 / 0.08);
  --shadow-hover: 0 6px 20px oklch(18% 0.02 60 / 0.14);
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-chip: 999px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.6;font-size:16px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{cursor:pointer;font-family:inherit}
ul{list-style:none}

/* Container */
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* ── Header / Nav ── */
.site-header{position:sticky;top:0;z-index:100;background:var(--color-surface);border-bottom:1px solid var(--color-border);height:64px;display:flex;align-items:center}
.header-inner{display:flex;align-items:center;gap:24px;width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.site-logo{font-size:18px;font-weight:700;color:var(--color-accent);white-space:nowrap;flex-shrink:0}
.nav-tabs{display:flex;align-items:center;gap:8px;flex:1;overflow-x:auto;scrollbar-width:none}
.nav-tabs::-webkit-scrollbar{display:none}
.nav-tab{display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:var(--radius-chip);font-size:14px;font-weight:500;border:1px solid var(--color-border);background:var(--color-bg);color:var(--color-muted);white-space:nowrap;transition:all 180ms ease}
.nav-tab:hover{border-color:var(--color-accent);color:var(--color-accent)}
.nav-tab.active{background:var(--color-accent);border-color:var(--color-accent);color:#fff}
.nav-cta{margin-left:auto;flex-shrink:0;display:inline-flex;align-items:center;height:36px;padding:0 20px;border-radius:var(--radius-btn);background:var(--color-accent);color:#fff;font-size:14px;font-weight:600;border:none;transition:all 180ms ease}
.nav-cta:hover{background:var(--color-accent-dark)}
.nav-cta:active{transform:scale(0.98)}
.nav-cta:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}
.hamburger{display:none;flex-direction:column;justify-content:center;align-items:center;width:44px;height:44px;gap:5px;background:none;border:none;margin-left:auto;flex-shrink:0}
.hamburger span{display:block;width:22px;height:2px;background:var(--color-text);border-radius:2px;transition:all 200ms ease}
.mobile-menu{display:none;position:fixed;top:64px;left:0;right:0;background:var(--color-surface);border-bottom:1px solid var(--color-border);padding:16px 24px;z-index:99;flex-direction:column;gap:8px}
.mobile-menu.open{display:flex}
.mobile-menu .nav-tab{width:100%;justify-content:center}
.mobile-menu .nav-cta{width:100%;justify-content:center}

/* ── Breadcrumb ── */
.breadcrumb{padding:16px 0 0;display:flex;align-items:center;gap:8px;font-size:13px;color:var(--color-muted)}
.breadcrumb a{color:var(--color-muted);transition:color 180ms}
.breadcrumb a:hover{color:var(--color-accent)}
.breadcrumb-sep{color:var(--color-border)}

/* ── Page Hero (二区 style: horizontal stat strip) ── */
.cat-hero{padding:32px 0 40px;background:var(--color-teal-soft);border-bottom:1px solid var(--color-border)}
.cat-hero-inner{display:grid;grid-template-columns:1fr auto;gap:32px;align-items:start}
.cat-hero-text h1{font-size:32px;font-weight:700;line-height:1.3;color:var(--color-text);margin-bottom:10px}
.cat-hero-text .subtitle{font-size:16px;color:var(--color-muted);margin-bottom:20px}
.cat-hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn-primary{display:inline-flex;align-items:center;height:44px;padding:0 24px;border-radius:var(--radius-btn);background:var(--color-accent);color:#fff;font-size:15px;font-weight:600;border:none;transition:all 180ms ease}
.btn-primary:hover{background:var(--color-accent-dark);transform:translateY(-1px)}
.btn-primary:active{transform:scale(0.98)}
.btn-primary:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}
.btn-outline-teal{display:inline-flex;align-items:center;height:44px;padding:0 24px;border-radius:var(--radius-btn);background:transparent;color:var(--color-teal);font-size:15px;font-weight:600;border:2px solid var(--color-teal);transition:all 180ms ease}
.btn-outline-teal:hover{background:var(--color-teal);color:#fff}
.btn-outline-teal:active{transform:scale(0.98)}
.cat-hero-stats{display:flex;flex-direction:column;gap:12px;flex-shrink:0}
.stat-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-card);padding:16px 24px;text-align:center;min-width:120px;box-shadow:var(--shadow-card)}
.stat-num{font-size:28px;font-weight:700;color:var(--color-teal);font-variant-numeric:tabular-nums;line-height:1.2}
.stat-label{font-size:12px;color:var(--color-muted);margin-top:4px}

/* ── Filter Bar ── */
.filter-bar{padding:20px 0 0}
.filter-label{font-size:13px;color:var(--color-muted);margin-bottom:10px}
.filter-chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--radius-chip);font-size:13px;font-weight:500;border:1px solid var(--color-border);background:var(--color-bg);color:var(--color-muted);cursor:pointer;transition:all 180ms ease;user-select:none}
.chip:hover{border-color:var(--color-teal);color:var(--color-teal)}
.chip.active{background:var(--color-teal);border-color:var(--color-teal);color:#fff}
.chip:focus-visible{outline:2px solid var(--color-teal);outline-offset:2px}

/* ── Main Layout ── */
.page-main{padding:32px 0 64px}
.content-layout{display:grid;grid-template-columns:1fr 280px;gap:40px;align-items:start}

/* ── Card Grid ── */
.section-title{font-size:20px;font-weight:700;color:var(--color-text);margin-bottom:20px;display:flex;align-items:center;gap:10px}
.section-title-badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--radius-chip);background:var(--color-teal-soft);color:var(--color-teal);font-size:12px;font-weight:600}
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.content-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-card);padding:20px;box-shadow:var(--shadow-card);transition:all 180ms ease;display:flex;flex-direction:column;gap:12px}
.content-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.card-tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--radius-chip);font-size:12px;font-weight:600;align-self:flex-start}
.tag-teal{background:var(--color-teal-soft);color:var(--color-teal)}
.tag-accent{background:var(--color-accent-soft);color:var(--color-accent)}
.card-title{font-size:15px;font-weight:700;color:var(--color-text);line-height:1.4}
.card-desc{font-size:13px;color:var(--color-muted);line-height:1.6;flex:1}
.card-link{display:inline-flex;align-items:center;gap:4px;font-size:13px;font-weight:600;color:var(--color-teal);margin-top:4px;transition:color 180ms}
.card-link:hover{color:var(--color-accent)}
.card-link::after{content:"→";transition:transform 180ms}
.card-link:hover::after{transform:translateX(3px)}

/* ── Pagination ── */
.pagination{display:flex;align-items:center;gap:8px;margin-top:32px;flex-wrap:wrap}
.page-btn{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 12px;border-radius:var(--radius-btn);font-size:14px;font-weight:500;border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-muted);cursor:pointer;transition:all 180ms ease}
.page-btn:hover{border-color:var(--color-teal);color:var(--color-teal)}
.page-btn.active{background:var(--color-teal);border-color:var(--color-teal);color:#fff}
.page-btn:focus-visible{outline:2px solid var(--color-teal);outline-offset:2px}

/* ── Sidebar ── */
.sidebar{display:flex;flex-direction:column;gap:24px}
.sidebar-block{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-card);padding:20px;box-shadow:var(--shadow-card)}
.sidebar-title{font-size:15px;font-weight:700;color:var(--color-text);margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--color-border)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}

/* ── FAQ ── */
.faq-section{margin-top:40px}
.faq-list{display:flex;flex-direction:column;gap:8px}
details.faq-item{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-card);overflow:hidden}
details.faq-item[open]{border-color:var(--color-teal)}
details.faq-item summary{padding:16px 20px;font-size:15px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
details.faq-item summary::-webkit-details-marker{display:none}
details.faq-item summary::after{content:"›";font-size:20px;color:var(--color-muted);transition:transform 200ms ease;flex-shrink:0;line-height:1}
details.faq-item[open] summary::after{transform:rotate(90deg);color:var(--color-teal)}
.faq-answer{padding:0 20px 16px;font-size:14px;color:var(--color-muted);line-height:1.7;background:var(--color-bg)}

/* ── CTA Strip ── */
.cta-strip{background:var(--color-teal);padding:48px 0;text-align:center;margin-top:64px}
.cta-strip h2{font-size:28px;font-weight:700;color:#fff;margin-bottom:10px}
.cta-strip p{font-size:15px;color:rgba(255,255,255,0.82);margin-bottom:24px}
.btn-white{display:inline-flex;align-items:center;height:44px;padding:0 28px;border-radius:var(--radius-btn);background:#fff;color:var(--color-teal);font-size:15px;font-weight:700;border:none;transition:transform 180ms ease}
.btn-white:hover{transform:scale(1.03)}
.btn-white:active{transform:scale(0.98)}

/* ── Footer ── */
.site-footer{background:var(--color-text);color:var(--color-bg);padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:32px}
.footer-logo{font-size:18px;font-weight:700;color:var(--color-accent);margin-bottom:12px}
.footer-brand p{font-size:13px;color:oklch(70% 0.015 60);line-height:1.7}
.footer-col h4{font-size:14px;font-weight:700;margin-bottom:14px;color:oklch(85% 0.015 60)}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-links a{font-size:13px;color:oklch(65% 0.015 60);transition:color 180ms}
.footer-links a:hover{color:var(--color-accent)}
.footer-bottom{border-top:1px solid oklch(30% 0.015 60);padding-top:20px;display:flex;flex-direction:column;gap:6px}
.footer-bottom p{font-size:12px;color:oklch(50% 0.015 60)}

/* ── Responsive ── */
@media(max-width:1024px){
  .content-layout{grid-template-columns:1fr}
  .sidebar{display:grid;grid-template-columns:1fr 1fr;gap:20px}
  .cat-hero-inner{grid-template-columns:1fr}
  .cat-hero-stats{flex-direction:row;flex-wrap:wrap}
  .stat-card{min-width:100px}
}
@media(max-width:768px){
  .hamburger{display:flex}
  .nav-tabs,.nav-cta{display:none}
  .card-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .sidebar{grid-template-columns:1fr}
  .cat-hero-text h1{font-size:26px}
}
@media(max-width:640px){
  .container{padding:0 16px}
  .cat-hero{padding:24px 0 32px}
  .page-main{padding:24px 0 48px}
  .cta-strip{padding:36px 0}
  .cta-strip h2{font-size:22px}
}
@media(prefers-reduced-motion:reduce){
  *{transition:none!important;transform:none!important}
}

/* roulang page: category1 */
:root {
  --color-bg: oklch(97% 0.012 60);
  --color-surface: oklch(99% 0.006 60);
  --color-border: oklch(88% 0.018 60);
  --color-accent: oklch(64% 0.16 32);
  --color-accent-dark: oklch(56% 0.16 32);
  --color-accent-soft: oklch(92% 0.06 32);
  --color-teal: oklch(54% 0.12 195);
  --color-teal-soft: oklch(93% 0.05 195);
  --color-text: oklch(18% 0.02 60);
  --color-muted: oklch(52% 0.02 60);
  --color-step-bg: oklch(90% 0.08 32);
  --shadow-card: 0 2px 8px oklch(18% 0.02 60 / 0.08);
  --shadow-card-hover: 0 6px 20px oklch(18% 0.02 60 / 0.14);
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-chip: 999px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  font-size: 16px;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; }

.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ── HEADER ── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  height: 64px;
  display: flex; align-items: center;
}
.header-inner {
  display: flex; align-items: center; gap: 24px;
  width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px;
}
.site-logo {
  font-size: 17px; font-weight: 700;
  color: var(--color-accent); white-space: nowrap; flex-shrink: 0;
}
.nav-tabs { display: flex; gap: 8px; flex: 1; }
.nav-tab {
  display: inline-flex; align-items: center; height: 36px;
  padding: 0 16px; border-radius: var(--radius-chip);
  font-size: 14px; font-weight: 500; white-space: nowrap;
  border: 1px solid var(--color-border);
  background: var(--color-bg); color: var(--color-text);
  transition: all 180ms ease;
}
.nav-tab:hover { border-color: var(--color-accent); color: var(--color-accent); }
.nav-tab.active { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.nav-cta {
  display: inline-flex; align-items: center; height: 36px;
  padding: 0 18px; border-radius: var(--radius-btn);
  background: var(--color-accent); color: #fff;
  font-size: 14px; font-weight: 600; border: none;
  transition: background 180ms ease, transform 180ms ease;
  flex-shrink: 0;
}
.nav-cta:hover { background: var(--color-accent-dark); }
.nav-cta:active { transform: scale(0.98); }
.nav-cta:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; padding: 10px; min-width: 44px; min-height: 44px;
  justify-content: center; align-items: center;
}
.hamburger span { display: block; width: 22px; height: 2px; background: var(--color-text); border-radius: 2px; transition: all 180ms ease; }
.mobile-menu {
  display: none; position: absolute; top: 64px; left: 0; right: 0;
  background: var(--color-surface); border-bottom: 1px solid var(--color-border);
  padding: 16px 24px; flex-direction: column; gap: 8px;
}
.mobile-menu.open { display: flex; }
.mobile-menu .nav-tab { width: 100%; justify-content: center; }
.mobile-menu .nav-cta { width: 100%; justify-content: center; }

/* ── BREADCRUMB ── */
.breadcrumb-bar { padding: 20px 0 0; }
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--color-muted);
}
.breadcrumb a { color: var(--color-accent); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb-sep { color: var(--color-border); }

/* ── PAGE HERO ── */
.page-hero { padding: 32px 0 40px; }
.page-hero h1 { font-size: 32px; font-weight: 700; line-height: 1.3; margin-bottom: 10px; }
.page-hero .subtitle { font-size: 16px; color: var(--color-muted); }

/* ── FILTER BAR ── */
.filter-section { padding: 0 0 32px; }
.filter-label { font-size: 13px; color: var(--color-muted); margin-bottom: 10px; }
.chip-group { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; height: 32px;
  padding: 0 14px; border-radius: var(--radius-chip);
  font-size: 13px; border: 1px solid var(--color-border);
  background: var(--color-surface); color: var(--color-text);
  cursor: pointer; transition: all 180ms ease;
}
.chip:hover { border-color: var(--color-accent); color: var(--color-accent); }
.chip.active { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }

/* ── CONTENT GRID ── */
.content-section { padding: 0 0 64px; }
.content-layout { display: grid; grid-template-columns: 1fr 280px; gap: 40px; align-items: start; }
.content-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.content-card {
  background: var(--color-surface); border-radius: var(--radius-card);
  box-shadow: var(--shadow-card); padding: 16px;
  transition: box-shadow 180ms ease, transform 180ms ease;
  display: flex; flex-direction: column; gap: 10px;
}
.content-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.card-tag {
  display: inline-flex; align-items: center; height: 24px;
  padding: 0 10px; border-radius: var(--radius-chip);
  font-size: 12px; font-weight: 600;
  background: var(--color-accent-soft); color: var(--color-accent);
  align-self: flex-start;
}
.card-tag.teal { background: var(--color-teal-soft); color: var(--color-teal); }
.card-title { font-size: 15px; font-weight: 600; line-height: 1.4; }
.card-desc { font-size: 13px; color: var(--color-muted); line-height: 1.5; flex: 1; }
.card-link {
  font-size: 13px; color: var(--color-accent); font-weight: 500;
  display: inline-flex; align-items: center; gap: 4px;
  transition: gap 180ms ease;
}
.card-link:hover { gap: 8px; }

/* ── PAGINATION ── */
.pagination { display: flex; align-items: center; gap: 8px; margin-top: 32px; flex-wrap: wrap; }
.page-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 36px; height: 36px; padding: 0 10px;
  border-radius: var(--radius-btn); border: 1px solid var(--color-border);
  background: var(--color-surface); color: var(--color-text);
  font-size: 14px; font-variant-numeric: tabular-nums;
  cursor: pointer; transition: all 180ms ease;
}
.page-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
.page-btn.active { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.page-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── SIDEBAR ── */
.sidebar { display: flex; flex-direction: column; gap: 24px; }
.sidebar-block {
  background: var(--color-surface); border-radius: var(--radius-card);
  box-shadow: var(--shadow-card); padding: 20px;
}
.sidebar-block h3 { font-size: 15px; font-weight: 700; margin-bottom: 14px; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud .chip { font-size: 12px; height: 28px; }
.related-links { display: flex; flex-direction: column; gap: 10px; }
.related-link {
  display: flex; align-items: center; gap: 10px;
  padding: 12px; border-radius: 8px;
  background: var(--color-bg); border: 1px solid var(--color-border);
  transition: border-color 180ms ease, background 180ms ease;
}
.related-link:hover { border-color: var(--color-accent); background: var(--color-accent-soft); }
.related-link-icon {
  width: 36px; height: 36px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; flex-shrink: 0;
}
.related-link-icon.orange { background: var(--color-accent-soft); }
.related-link-icon.teal { background: var(--color-teal-soft); }
.related-link-text { font-size: 13px; font-weight: 600; }
.related-link-sub { font-size: 12px; color: var(--color-muted); }

/* ── FAQ ── */
.faq-section { padding: 64px 0; background: var(--color-accent-soft); }
.faq-section .section-title { font-size: 24px; font-weight: 700; margin-bottom: 24px; }
.faq-list { display: flex; flex-direction: column; gap: 8px; max-width: 760px; }
details.faq-item {
  background: var(--color-surface); border-radius: var(--radius-card);
  box-shadow: var(--shadow-card); overflow: hidden;
}
details.faq-item summary {
  padding: 16px 20px; font-size: 15px; font-weight: 600;
  cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px;
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary::after {
  content: "›"; font-size: 20px; color: var(--color-accent);
  transform: rotate(90deg); transition: transform 200ms ease;
  flex-shrink: 0;
}
details.faq-item[open] summary::after { transform: rotate(270deg); }
.faq-answer { padding: 0 20px 16px; font-size: 14px; color: var(--color-muted); line-height: 1.7; background: var(--color-bg); }

/* ── CTA ── */
.cta-section {
  background: var(--color-accent); padding: 64px 0; text-align: center;
}
.cta-section h2 { font-size: 32px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.cta-section p { font-size: 16px; color: rgba(255,255,255,0.82); margin-bottom: 28px; }
.cta-btn {
  display: inline-flex; align-items: center; height: 48px;
  padding: 0 32px; border-radius: var(--radius-btn);
  background: #fff; color: var(--color-accent);
  font-size: 16px; font-weight: 700; border: none;
  transition: transform 180ms ease, box-shadow 180ms ease;
  cursor: pointer;
}
.cta-btn:hover { transform: scale(1.03); box-shadow: 0 8px 24px oklch(18% 0.02 60 / 0.18); }
.cta-btn:active { transform: scale(0.98); }
.cta-btn:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }

/* ── FOOTER ── */
.site-footer { background: var(--color-text); color: var(--color-bg); padding: 48px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-logo { font-size: 18px; font-weight: 700; color: var(--color-accent-soft); margin-bottom: 12px; }
.footer-brand p { font-size: 13px; color: oklch(75% 0.012 60); line-height: 1.7; }
.footer-col h4 { font-size: 14px; font-weight: 700; margin-bottom: 14px; color: oklch(90% 0.01 60); }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-links a { font-size: 13px; color: oklch(68% 0.012 60); transition: color 180ms ease; }
.footer-links a:hover { color: var(--color-accent-soft); }
.footer-bottom {
  border-top: 1px solid oklch(30% 0.015 60);
  padding: 20px 0; display: flex; flex-wrap: wrap; gap: 8px;
  justify-content: space-between; align-items: center;
}
.footer-bottom p { font-size: 12px; color: oklch(55% 0.012 60); }

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .content-layout { grid-template-columns: 1fr; }
  .sidebar { display: grid; grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-tabs, .nav-cta { display: none; }
  .hamburger { display: flex; margin-left: auto; }
  .content-grid { grid-template-columns: 1fr; }
  .sidebar { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .page-hero h1 { font-size: 26px; }
  .faq-section { padding: 40px 0; }
  .cta-section { padding: 40px 0; }
  .cta-section h2 { font-size: 24px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .chip-group { gap: 6px; }
  .pagination { gap: 6px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0ms !important; animation-duration: 0ms !important; }
}