/* roulang page: index */
:root {
  --bg-page: #F6F4EF;
  --bg-surface: #FFFFFF;
  --bg-surface-deep: #EAE8E1;
  --bg-dark: #122320;
  --ink-1: #17231F;
  --ink-2: #55615C;
  --line: #DCE0D8;
  --primary: #0F4C46;
  --primary-2: #117A6B;
  --primary-soft: #E4F0EE;
  --accent: #F26B38;
  --accent-soft: #FDEBE2;
  --success: #3F7D57;
  --danger: #C44D3F;
  --radius-sm: 4px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(18,35,32,.04);
  --shadow-md: 0 8px 20px rgba(18,35,32,.08);
  --container: 1200px;
  --space-section: 88px;
  --space-section-m: 64px;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  background: var(--bg-page);
  color: var(--ink-1);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0;
}
img {
  max-width: 100%;
  display: block;
  height: auto;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color .2s, background-color .2s, border-color .2s, box-shadow .2s, transform .2s;
}
button, input, select, textarea {
  font: inherit;
}
ul, ol {
  padding-left: 1.2em;
}
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.section {
  padding: var(--space-section) 0;
}
.section-head {
  max-width: 860px;
  margin-bottom: 40px;
  position: relative;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--primary-2);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .2px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--accent);
  display: inline-block;
  border-radius: 2px;
}
.section-title {
  font-size: 34px;
  line-height: 1.35;
  font-weight: 800;
  margin-top: 14px;
  letter-spacing: 0;
  color: var(--ink-1);
}
.section-lead {
  margin-top: 16px;
  font-size: 17px;
  color: var(--ink-2);
  max-width: 760px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color .2s, background-color .2s, border-color .2s, transform .2s, box-shadow .2s;
}
.btn:focus-visible {
  outline: 3px solid rgba(18, 122, 107, .3);
  outline-offset: 2px;
}
.btn-accent {
  background: var(--accent);
  color: #fff;
}
.btn-accent:hover {
  background: #df5e2d;
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(242, 107, 56, .22);
}
.btn-accent:active {
  transform: translateY(0);
  opacity: .94;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: #0b3a36;
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(15, 76, 70, .2);
}
.btn-primary:active {
  transform: translateY(0);
  opacity: .94;
}
.btn-outline {
  background: #fff;
  color: var(--ink-1);
  border-color: var(--line);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.btn-light {
  background: #fff;
  color: var(--primary);
}
.btn-light:hover {
  background: var(--primary-soft);
}
.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
  border-radius: 8px;
}
.header-btn {
  justify-self: end;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .97);
  border-bottom: 1px solid rgba(220, 224, 216, .9);
}
.header-top {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  padding: 16px 0 6px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.brand-cn {
  font-size: 21px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  letter-spacing: .2px;
}
.brand-region {
  font-size: 13px;
  color: var(--primary-2);
  background: var(--primary-soft);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  white-space: nowrap;
}
.header-search {
  position: relative;
  height: 46px;
  max-width: 560px;
  width: 100%;
  justify-self: center;
}
.header-search svg.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--ink-2);
  pointer-events: none;
}
.header-search input {
  width: 100%;
  height: 46px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  background: var(--bg-surface-deep);
  padding: 0 22px 0 46px;
  font-size: 15px;
  color: var(--ink-1);
  transition: background .2s, border-color .2s, box-shadow .2s;
}
.header-search input::placeholder {
  color: var(--ink-2);
  opacity: .8;
}
.header-search input:focus {
  outline: none;
  background: #fff;
  border-color: var(--primary-2);
  box-shadow: 0 0 0 3px rgba(18, 122, 107, .15);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 4px 0 12px;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
}
.main-nav::-webkit-scrollbar {
  display: none;
}
.main-nav a {
  position: relative;
  padding: 6px 16px 8px;
  color: var(--ink-2);
  font-weight: 600;
  border-radius: var(--radius-pill);
  transition: color .2s, background .2s;
}
.main-nav a:hover {
  color: var(--primary);
  background: var(--primary-soft);
}
.main-nav a.active {
  color: var(--primary-2);
}
.main-nav a.active::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: calc(50% - 3px);
  width: 6px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.hero {
  position: relative;
  background: var(--bg-dark);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.hero-backdrop {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(108deg, rgba(5, 24, 22, .96) 0%, rgba(15, 76, 70, .82) 58%, rgba(18, 35, 32, .78) 100%),
    url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
}
.hero-contour {
  position: absolute;
  right: -10%;
  bottom: -12%;
  width: 72%;
  height: 60%;
  opacity: .2;
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 860px;
  padding: 122px 0 100px;
}
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  color: #EAF2EF;
}
.hero h1 {
  margin-top: 24px;
  font-size: 46px;
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -0.4px;
  color: #fff;
}
.hero-sub {
  margin-top: 20px;
  font-size: 17px;
  color: rgba(255, 255, 255, .84);
  max-width: 660px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}
.hero-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, .74);
  border-top: 1px solid rgba(255, 255, 255, .18);
  padding-top: 20px;
  margin-top: 58px;
  max-width: 660px;
  flex-wrap: wrap;
}
.hero-meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .55);
}
.pain-area {
  background: var(--bg-page);
}
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}
.pain-card {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  border-top: 3px solid var(--primary);
  padding: 30px 26px 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .25s, transform .25s, border-color .25s;
}
.pain-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: rgba(15, 76, 70, .4);
}
.icon-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  margin-bottom: 22px;
}
.icon-chip svg {
  width: 21px;
  height: 21px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.pain-card h3 {
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 10px;
}
.pain-card p {
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.8;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 16px;
  color: var(--primary-2);
  font-weight: 600;
  font-size: 14px;
}
.card-link:hover {
  color: var(--primary);
  text-decoration: underline;
}
.solution-section {
  background: var(--bg-dark);
  color: #fff;
}
.solution-inner {
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  gap: 72px;
  align-items: start;
}
.solution-left {
  position: sticky;
  top: 120px;
}
.solution-title {
  color: #fff;
  font-size: 36px;
  font-weight: 800;
  line-height: 1.35;
  margin-top: 16px;
}
.solution-desc {
  color: rgba(255, 255, 255, .78);
  font-size: 16px;
  line-height: 1.9;
  margin-top: 18px;
}
.solution-image {
  margin-top: 32px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .1);
  aspect-ratio: 16 / 10;
  background: rgba(255, 255, 255, .06);
}
.solution-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.solution-steps {
  display: flex;
  flex-direction: column;
}
.step-row {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 8px 18px;
  border-top: 1px solid rgba(255, 255, 255, .14);
  padding: 26px 0;
}
.step-row:last-child {
  border-bottom: 1px solid rgba(255, 255, 255, .14);
}
.step-num {
  font-size: 24px;
  font-weight: 800;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  line-height: 1.3;
}
.step-row h3 {
  color: #fff;
  font-size: 19px;
  font-weight: 800;
  line-height: 1.4;
}
.step-row p {
  grid-column: 2;
  color: rgba(255, 255, 255, .7);
  font-size: 15px;
  line-height: 1.85;
}
.solution-cta {
  margin-top: 16px;
  display: inline-flex;
  gap: 14px;
  align-items: center;
}
.stats-section {
  background: var(--primary-soft);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat-cell {
  position: relative;
  text-align: center;
  padding: 26px 18px;
}
.stat-cell + .stat-cell::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: #C9D6CF;
}
.stat-num {
  font-size: 44px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
}
.stat-text {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}
.stat-label {
  color: var(--ink-2);
  font-size: 14px;
  margin-top: 10px;
  line-height: 1.6;
}
.testimonial-section {
  background: var(--bg-page);
}
.testi-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 24px;
  margin-top: 36px;
}
.testi-main-card {
  background: var(--bg-surface);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 34px 32px;
  box-shadow: var(--shadow-sm);
}
.testi-side {
  display: grid;
  gap: 24px;
}
.testi-card {
  background: var(--bg-surface);
  border-left: 4px solid var(--primary-2);
  border-radius: var(--radius-md);
  padding: 26px 26px 22px;
  box-shadow: var(--shadow-sm);
}
.testi-text {
  font-size: 16px;
  color: var(--ink-1);
  line-height: 1.9;
}
.testi-text::before {
  content: "“";
  color: var(--primary-2);
  font-size: 28px;
  font-weight: 800;
}
.testi-text::after {
  content: "”";
  color: var(--primary-2);
  font-size: 28px;
  font-weight: 800;
}
.testi-person {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 22px;
}
.avatar-circle {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 17px;
  flex-shrink: 0;
}
.testi-person strong {
  font-size: 15px;
  display: block;
  line-height: 1.4;
}
.testi-person span {
  font-size: 13px;
  color: var(--ink-2);
  display: block;
}
.latest-section {
  background: var(--bg-page);
  padding-top: 0;
}
.latest-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 32px;
}
.more-link {
  font-weight: 700;
  color: var(--primary-2);
  font-size: 15px;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.more-link:hover {
  color: var(--primary);
  text-decoration: underline;
}
.update-grid {
  display: grid;
  grid-template-columns: 1.85fr 1fr;
  gap: 24px;
}
.update-feature {
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .25s, transform .25s, border-color .25s;
}
.update-feature:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: rgba(15, 76, 70, .4);
}
.update-feature-media {
  aspect-ratio: 16 / 8.5;
  background: var(--bg-surface-deep);
  overflow: hidden;
}
.update-feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.update-feature-body {
  padding: 24px 26px 26px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  flex: 1;
}
.badge {
  display: inline-flex;
  align-items: center;
  background: var(--primary-soft);
  color: var(--primary);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 700;
}
.update-feature-title {
  font-size: 22px;
  line-height: 1.5;
  font-weight: 800;
  margin: 14px 0 10px;
  color: var(--ink-1);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.update-feature-summary {
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.85;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 18px;
}
.update-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--ink-2);
  margin-top: auto;
  flex-wrap: wrap;
}
.update-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.list-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .2s, transform .2s, border-color .2s;
  flex: 1;
}
.list-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.list-card h3 {
  font-size: 18px;
  line-height: 1.5;
  font-weight: 800;
  color: var(--ink-1);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.list-card p {
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.75;
  margin-top: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.list-meta {
  font-size: 13px;
  color: var(--ink-2);
  margin-top: auto;
  padding-top: 14px;
}
.list-card-empty {
  background: transparent;
  border: 1px dashed #C5CDC4;
  color: var(--ink-2);
  justify-content: center;
  font-size: 14px;
  text-align: center;
  min-height: 120px;
}
.update-empty {
  background: var(--bg-surface);
  border: 1px dashed var(--line);
  border-radius: 16px;
  padding: 56px 32px;
  text-align: center;
  color: var(--ink-2);
  font-size: 15px;
}
.faq-section {
  background: var(--bg-surface);
  border-top: 1px solid var(--line);
}
.faq-list {
  max-width: 900px;
  display: grid;
  gap: 14px;
  margin-top: 20px;
}
.faq-item {
  background: var(--bg-page);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 22px 26px;
  font-weight: 700;
  font-size: 16px;
  color: var(--ink-1);
  transition: background .2s;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary:hover {
  background: var(--primary-soft);
}
.faq-item[open] summary {
  border-bottom: 1px solid var(--line);
}
.faq-item summary::after {
  content: "+";
  margin-left: auto;
  font-size: 24px;
  font-weight: 400;
  color: var(--primary-2);
  transition: transform .2s;
  line-height: 1;
}
.faq-item[open] summary::after {
  content: "−";
}
.faq-answer {
  padding: 16px 26px 24px;
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.9;
}
.cta-section {
  background: var(--accent-soft);
}
.cta-box {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}
.cta-box h2 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.35;
}
.cta-box p {
  margin-top: 16px;
  color: var(--ink-2);
  font-size: 16px;
}
.cta-actions {
  display: flex;
  justify-content: center;
  margin-top: 28px;
  gap: 14px;
  flex-wrap: wrap;
}
.site-footer {
  background: var(--bg-dark);
  color: #E6EDEA;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.7fr 1fr 1.3fr;
  gap: 48px;
  padding: 60px 0 44px;
}
.footer-brand-text {
  margin-top: 18px;
  font-size: 14px;
  color: rgba(255, 255, 255, .68);
  line-height: 1.85;
}
.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.footer-links {
  display: grid;
  gap: 8px;
  padding-left: 0;
  list-style: none;
}
.footer-links a {
  color: rgba(255, 255, 255, .7);
  font-size: 14px;
}
.footer-links a:hover {
  color: #fff;
  text-decoration: underline;
}
.footer-note-list {
  padding-left: 0;
  list-style: none;
  color: rgba(255, 255, 255, .6);
  font-size: 14px;
  display: grid;
  gap: 8px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 24px 0 30px;
  font-size: 13px;
  color: rgba(255, 255, 255, .56);
}
.footer-bottom .footer-domain {
  color: rgba(255, 255, 255, .72);
}
@media (max-width: 1024px) {
  .section {
    padding: 72px 0;
  }
  .solution-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .solution-left {
    position: static;
  }
  .solution-image {
    max-width: 680px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat-cell:nth-child(3)::before {
    display: none;
  }
  .stat-cell {
    padding: 22px 12px;
  }
  .header-top {
    grid-template-columns: auto 1fr auto;
    gap: 16px;
  }
  .header-search {
    max-width: 420px;
  }
}
@media (max-width: 768px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .section {
    padding: var(--space-section-m) 0;
  }
  .section-title {
    font-size: 27px;
  }
  .header-top {
    grid-template-columns: 1fr auto;
    gap: 10px;
    padding-top: 12px;
  }
  .header-search {
    grid-column: 1 / -1;
    grid-row: 2;
    height: 44px;
    max-width: none;
  }
  .header-search input {
    height: 44px;
    padding: 0 16px 0 42px;
    font-size: 14px;
  }
  .main-nav {
    grid-column: 1 / -1;
    padding-bottom: 12px;
  }
  .main-nav a {
    padding: 6px 12px 8px;
    font-size: 14px;
  }
  .header-btn {
    display: none;
  }
  .pain-grid,
  .update-grid,
  .testi-grid {
    grid-template-columns: 1fr;
  }
  .testi-main-card {
    padding: 24px 20px;
  }
  .latest-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .update-feature-media {
    aspect-ratio: 16 / 9;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 44px 0 32px;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  .stat-cell:nth-child(3)::before,
  .stat-cell:nth-child(4)::before {
    display: none;
  }
  .stat-cell:nth-child(odd)::after {
    content: "";
    position: absolute;
    right: 0;
    top: 20%;
    height: 60%;
    width: 1px;
    background: #C9D6CF;
  }
}
@media (max-width: 640px) {
  .brand-cn {
    font-size: 19px;
  }
  .brand-region {
    font-size: 12px;
    padding: 2px 8px;
  }
  .hero-inner {
    padding: 68px 0 56px;
  }
  .hero h1 {
    font-size: 31px;
    line-height: 1.36;
  }
  .hero-sub {
    font-size: 15px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-meta {
    margin-top: 28px;
    font-size: 13px;
  }
  .solution-title {
    font-size: 27px;
  }
  .step-row {
    grid-template-columns: 46px 1fr;
  }
  .step-row h3 {
    font-size: 17px;
  }
  .cta-box h2 {
    font-size: 26px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  .faq-item summary {
    padding: 18px 18px;
    font-size: 15px;
    gap: 10px;
  }
  .faq-answer {
    padding: 14px 18px 20px;
    font-size: 14px;
  }
  .update-feature-body {
    padding: 20px;
  }
  .update-feature-title {
    font-size: 19px;
  }
}
@media (max-width: 375px) {
  .brand-cn {
    font-size: 17px;
  }
  .stat-num {
    font-size: 34px;
  }
  .stat-text {
    font-size: 20px;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .stat-cell::before,
  .stat-cell::after {
    display: none !important;
  }
  .stat-cell {
    border-bottom: 1px solid #C9D6CF;
    padding: 18px 8px;
  }
  .stat-cell:last-child {
    border-bottom: 0;
  }
  .main-nav a {
    font-size: 13px;
    padding: 6px 10px 7px;
  }
  .hero h1 {
    font-size: 28px;
  }
}

/* roulang page: article */
:root{
  --bg-page:#F6F4EF;
  --bg-surface:#FFFFFF;
  --bg-surface-deep:#EAE8E1;
  --bg-dark:#122320;
  --ink-1:#17231F;
  --ink-2:#55615C;
  --line:#DCE0D8;
  --primary:#0F4C46;
  --primary-2:#117A6B;
  --primary-soft:#E4F0EE;
  --accent:#F26B38;
  --accent-soft:#FDEBE2;
  --success:#3F7D57;
  --danger:#C44D3F;
  --radius-sm:4px;
  --radius-md:12px;
  --radius-pill:999px;
  --radius-lg:24px;
  --shadow-card:0 1px 2px rgba(18,35,32,.04);
  --shadow-float:0 8px 20px rgba(18,35,32,.08);
  --font-main:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Segoe UI",sans-serif;
  --container-w:1200px;
  --space-section:88px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-main);
  font-size:16px;
  line-height:1.75;
  letter-spacing:0;
  color:var(--ink-1);
  background:var(--bg-page);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:var(--primary-2);text-decoration:none;transition:color .2s ease,border-color .2s ease}
a:hover{color:var(--primary)}
ul,ol{list-style-position:inside}
button,input,textarea,select{font:inherit}
.container{
  width:100%;
  max-width:var(--container-w);
  margin:0 auto;
  padding:0 24px;
}
@media(max-width:768px){
  .container{padding:0 16px}
  :root{--space-section:64px}
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:20px;
  line-height:1.3;
  color:var(--primary);
  font-weight:800;
  letter-spacing:.5px;
}
.brand-cn{
  font-weight:800;
  color:var(--primary);
}
.brand-region{
  font-weight:400;
  color:var(--primary-2);
  font-size:15px;
  background:var(--primary-soft);
  border-radius:var(--radius-pill);
  padding:2px 10px;
  letter-spacing:1px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:10px;
  font-weight:600;
  padding:12px 24px;
  border:1px solid transparent;
  cursor:pointer;
  text-align:center;
  transition:transform .15s ease,box-shadow .2s ease,background-color .2s ease,border-color .2s ease,opacity .2s ease;
  line-height:1.4;
  font-size:15px;
}
.btn-accent{
  background:var(--accent);
  color:#fff;
}
.btn-accent:hover{
  background:#d95a2b;
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 6px 16px rgba(242,107,56,.28);
}
.btn-accent:active{
  transform:translateY(0);
  opacity:.94;
}
.btn-outline{
  background:#fff;
  border-color:var(--line);
  color:var(--ink-1);
}
.btn-outline:hover{
  border-color:var(--primary-2);
  color:var(--primary);
  transform:translateY(-2px);
  box-shadow:var(--shadow-card);
}
.btn-primary{
  background:var(--primary);
  color:#fff;
}
.btn-primary:hover{
  background:#0c3d39;
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 6px 16px rgba(15,76,70,.26);
}
.btn-sm{
  padding:9px 18px;
  font-size:14px;
  border-radius:var(--radius-pill);
}
.btn-lg{
  padding:14px 34px;
  font-size:16px;
  border-radius:12px;
}
.site-header{
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
  position:relative;
  z-index:50;
}
.site-header.shadowed{
  box-shadow:0 4px 12px rgba(18,35,32,.06);
}
.header-top{
  display:flex;
  align-items:center;
  gap:30px;
  padding:16px 0;
}
.header-search{
  flex:1;
  display:flex;
  align-items:center;
  gap:10px;
  background:#F0EEE8;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  padding:9px 20px;
  max-width:560px;
  margin-left:auto;
  transition:background .2s,box-shadow .2s,border-color .2s;
}
.header-search:focus-within{
  background:#fff;
  border-color:var(--primary-2);
  box-shadow:0 0 0 3px rgba(18,122,107,.15);
}
.header-search .search-icon{
  width:18px;
  height:18px;
  color:var(--ink-2);
  flex:none;
}
.header-search input{
  border:none;
  outline:none;
  background:transparent;
  width:100%;
  font-size:14px;
  color:var(--ink-1);
}
.header-search input::-webkit-search-cancel-button{
  -webkit-appearance:none;
  width:16px;
  height:16px;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2355625c'%3E%3Cpath d='M8 6.6 5.8 4.4a.7.7 0 0 0-1 .1.8.8 0 0 0 .1 1L7 7.8l-2.1 2.3a.8.8 0 0 0 0 1 .7.7 0 0 0 1 .1L8 9l2.2 2.2a.7.7 0 0 0 1-.1.8.8 0 0 0 0-1.1L9.1 7.8l2.1-2.2a.8.8 0 0 0-.1-1.1.7.7 0 0 0-1 0L8 6.7z'/%3E%3C/svg%3E") center/16px no-repeat;
  cursor:pointer;
  opacity:.5;
}
.header-search input::placeholder{color:#8a938e}
.main-nav{
  border-top:1px solid #e9e8e2;
  display:flex;
  gap:32px;
  overflow-x:auto;
  scrollbar-width:none;
  padding:13px 0;
}
.main-nav::-webkit-scrollbar{display:none}
.main-nav a{
  font-size:15px;
  font-weight:500;
  color:var(--ink-2);
  white-space:nowrap;
  padding:4px 0;
  border-bottom:3px solid transparent;
  transition:color .2s,border-color .2s;
}
.main-nav a:hover{
  color:var(--primary);
  border-bottom-color:var(--primary-soft);
}
.main-nav a.active{
  color:var(--primary-2);
  font-weight:700;
  border-bottom-color:var(--accent);
}
.header-top .header-btn{
  flex:none;
}
@media(max-width:900px){
  .header-top{
    flex-wrap:wrap;
    gap:12px;
  }
  .brand{
    width:100%;
  }
  .header-search{
    order:3;
    flex-basis:100%;
    max-width:none;
    margin-left:0;
  }
}
@media(max-width:640px){
  .header-top{
    gap:10px;
  }
  .main-nav{
    gap:20px;
  }
}
.article-shell{
  padding:var(--space-section) 0;
}
.breadcrumb{
  font-size:14px;
  color:var(--ink-2);
  margin-bottom:24px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
}
.breadcrumb .sep{
  color:#b7bdb7;
}
.breadcrumb a{
  color:var(--ink-2);
}
.breadcrumb a:hover{
  color:var(--primary);
}
.breadcrumb .current{
  color:var(--ink-1);
  max-width:320px;
  overflow:hidden;
  white-space:nowrap;
  text-overflow:ellipsis;
}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 280px;
  gap:48px;
  align-items:start;
}
@media(max-width:1200px){
  .article-layout{
    grid-template-columns:minmax(0,1fr);
  }
  .article-side{
    display:none;
  }
}
.article-main{
  background:var(--bg-surface);
  border:1px solid var(--line);
  border-radius:20px;
  padding:48px 48px 40px;
  box-shadow:var(--shadow-card);
}
@media(max-width:768px){
  .article-main{
    padding:28px 20px;
    border-radius:14px;
  }
}
.article-head{
  border-bottom:1px solid var(--line);
  padding-bottom:26px;
  margin-bottom:34px;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 18px;
  color:var(--ink-2);
  font-size:13px;
  margin-bottom:16px;
}
.category-dot{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:var(--primary-soft);
  color:var(--primary);
  border-radius:6px;
  padding:4px 10px;
  font-size:13px;
  font-weight:600;
}
.meta-divider{
  width:1px;
  height:14px;
  background:var(--line);
}
.article-h1{
  font-size:34px;
  font-weight:800;
  color:var(--ink-1);
  line-height:1.4;
  letter-spacing:0;
  margin:0;
}
@media(max-width:768px){
  .article-h1{
    font-size:25px;
  }
}
.reading-guide{
  margin-bottom:40px;
}
.toc-card{
  background:var(--bg-page);
  border:1px solid var(--line);
  border-radius:14px;
  padding:20px 24px;
}
.toc-title{
  font-weight:700;
  font-size:16px;
  color:var(--primary);
  margin-bottom:12px;
  display:flex;
  align-items:center;
  gap:8px;
}
.toc-list{
  list-style:none;
  display:grid;
  gap:6px;
}
.toc-list li{
  border-top:1px dashed var(--line);
  padding-top:6px;
  font-size:14px;
}
.toc-list li a{
  color:var(--ink-1);
}
.quick-note{
  display:flex;
  flex-direction:column;
  gap:14px;
  margin-top:14px;
}
.quick-note-item{
  display:grid;
  grid-template-columns:26px 1fr;
  gap:12px;
  align-items:flex-start;
}
.note-index{
  width:26px;
  height:26px;
  border-radius:50%;
  background:var(--primary-soft);
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:13px;
  font-weight:700;
}
.quick-note-item p{
  font-size:15px;
  color:var(--ink-2);
}
.article-body{
  font-size:17px;
  line-height:1.85;
  color:var(--ink-1);
  max-width:100%;
  overflow-wrap:break-word;
}
.article-body > * + *{
  margin-top:16px;
}
.article-body > p{
  margin-bottom:16px;
}
.article-body h2{
  font-size:25px;
  font-weight:800;
  color:var(--ink-1);
  padding-left:15px;
  margin:40px 0 18px;
  border-left:4px solid var(--accent);
  line-height:1.5;
}
.article-body h3{
  font-size:20px;
  font-weight:700;
  color:var(--ink-1);
  margin:30px 0 12px;
  line-height:1.6;
}
.article-body p{
  margin-bottom:14px;
}
.article-body ul,.article-body ol{
  margin-bottom:14px;
  padding-left:22px;
}
.article-body li{
  margin-bottom:8px;
  line-height:1.8;
}
.article-body blockquote{
  border-left:4px solid var(--primary-2);
  background:var(--primary-soft);
  padding:16px 20px;
  border-radius:0 10px 10px 0;
  color:var(--ink-2);
  margin:22px 0;
}
.article-body img{
  border-radius:16px;
  margin:24px 0;
  box-shadow:var(--shadow-float);
}
.article-body a{
  color:var(--accent);
  border-bottom:1px solid rgba(242,107,56,.35);
}
.article-body a:hover{
  border-bottom-color:var(--accent);
}
.article-body table{
  border-collapse:collapse;
  width:100%;
  font-size:15px;
  margin:20px 0;
  overflow:hidden;
  border-radius:10px;
  background:#fff;
}
.article-body th{
  background:var(--primary-soft);
  color:var(--primary);
  text-align:left;
  font-weight:600;
}
.article-body th,.article-body td{
  border:1px solid var(--line);
  padding:10px 14px;
}
.article-body figcaption{
  font-size:13px;
  color:var(--ink-2);
  text-align:center;
  margin-top:-16px;
  margin-bottom:24px;
}
.article-back{
  margin-top:38px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.article-back a{
  color:var(--primary-2);
  font-size:14px;
}
.article-side{
  position:sticky;
  top:24px;
}
.side-card{
  background:var(--bg-surface);
  border:1px solid var(--line);
  border-radius:14px;
  padding:20px;
  margin-bottom:18px;
}
.side-card h3{
  font-size:16px;
  font-weight:700;
  color:var(--ink-1);
  margin-bottom:14px;
  display:flex;
  align-items:center;
  gap:7px;
}
.side-card h3::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--accent);
  flex:none;
}
.side-list{
  list-style:none;
}
.side-list li + li{
  margin-top:12px;
}
.side-list a{
  font-size:14px;
  color:var(--ink-2);
  line-height:1.6;
  display:inline;
}
.side-list a:hover{
  color:var(--primary);
}
.side-tag-box{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.side-tag{
  background:var(--bg-page);
  color:var(--ink-2);
  font-size:13px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  padding:4px 12px;
  transition:all .2s;
}
.side-tag:hover{
  color:var(--primary);
  border-color:var(--primary-2);
  background:var(--primary-soft);
}
.extend-section{
  margin-top:70px;
  padding-bottom:8px;
}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:26px;
}
.section-title{
  font-size:24px;
  font-weight:800;
  color:var(--ink-1);
  margin:0;
  display:flex;
  flex-direction:column;
  gap:6px;
}
.section-title .title-deco{
  width:34px;
  height:4px;
  background:var(--accent);
  border-radius:2px;
}
.section-sub{
  color:var(--ink-2);
  font-size:15px;
}
.more-link{
  font-size:14px;
  font-weight:600;
  color:var(--primary-2);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.more-link::after{
  content:"→";
  transition:transform .2s;
}
.more-link:hover::after{
  transform:translateX(4px);
}
.card-grid-third{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
@media(max-width:960px){
  .card-grid-third{
    grid-template-columns:repeat(2,1fr);
  }
}
@media(max-width:640px){
  .card-grid-third{
    grid-template-columns:1fr;
    gap:16px;
  }
  .extend-card .card-media{
    aspect-ratio:16/7;
  }
}
.extend-card{
  background:var(--bg-surface);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  box-shadow:var(--shadow-card);
  display:flex;
  flex-direction:column;
  height:100%;
}
.extend-card:hover{
  border-color:var(--primary-2);
  box-shadow:var(--shadow-float);
  transform:translateY(-3px);
}
.extend-card .card-media{
  aspect-ratio:16/9;
  overflow:hidden;
  position:relative;
}
.extend-card .card-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.extend-card:hover .card-media img{
  transform:scale(1.05);
}
.extend-card .card-content{
  padding:20px;
  display:flex;
  flex-direction:column;
  gap:10px;
  flex:1;
}
.extend-card .extend-cat{
  font-size:12px;
  background:var(--primary-soft);
  color:var(--primary);
  border-radius:4px;
  display:inline-block;
  padding:2px 8px;
  font-weight:500;
  width:auto;
  align-self:flex-start;
}
.extend-card h3{
  font-size:18px;
  line-height:1.55;
  color:var(--ink-1);
  font-weight:700;
}
.extend-card h3 a{
  color:inherit;
}
.extend-card h3 a:hover{
  color:var(--primary);
}
.extend-card p{
  color:var(--ink-2);
  font-size:14px;
  line-height:1.7;
  flex:1;
}
.site-footer{
  background:var(--bg-dark);
  color:rgba(255,255,255,.76);
  padding-top:72px;
  margin-top:24px;
  border-radius:34px 34px 0 0;
}
@media(max-width:768px){
  .site-footer{
    padding-top:52px;
    border-radius:24px 24px 0 0;
  }
}
.footer-top{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr;
  gap:36px;
  padding-bottom:48px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
@media(max-width:768px){
  .footer-top{
    grid-template-columns:1fr;
    gap:28px;
  }
}
.footer-brand p{
  font-size:14px;
  margin-top:16px;
  max-width:360px;
  line-height:1.85;
}
.footer-title{
  color:#fff;
  font-size:15px;
  font-weight:700;
  margin-bottom:12px;
}
.footer-links{
  list-style:none;
  display:grid;
  gap:10px;
}
.footer-links a{
  color:rgba(255,255,255,.68);
  font-size:14px;
  transition:color .2s;
}
.footer-links a:hover{
  color:#fff;
}
.footer-note-list{
  list-style:none;
  display:grid;
  gap:10px;
  font-size:14px;
  color:rgba(255,255,255,.6);
}
.footer-bottom{
  padding:26px 0 32px;
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.5);
}
.footer-domain{
  opacity:.75;
}
.cta-band{
  margin-top:26px;
}
.cta-block{
  background:var(--accent-soft);
  border-radius:24px;
  padding:56px 40px;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.cta-block::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/coverpic/cover-3.webp");
  background-size:cover;
  background-position:center;
  opacity:.18;
}
.cta-block .cta-content{
  position:relative;
}
.cta-block h2{
  font-size:28px;
  font-weight:800;
  color:var(--ink-1);
  margin-bottom:12px;
}
@media(max-width:768px){
  .cta-block h2{
    font-size:22px;
  }
  .cta-block{
    padding:40px 22px;
  }
}
.cta-block p{
  color:var(--ink-2);
  font-size:16px;
  margin-bottom:24px;
}
.empty-article{
  text-align:center;
  padding:50px 0;
}
.empty-icon{
  font-size:42px;
  margin-bottom:10px;
}
.empty-article h2{
  font-size:22px;
  color:var(--ink-1);
  margin-bottom:10px;
}
.empty-article p{
  color:var(--ink-2);
  margin-bottom:18px;
}
@media(max-width:520px){
  .section-title{
    font-size:20px;
  }
  .breadcrumb .current{
    max-width:150px;
  }
}

/* roulang page: category2 */
:root {
  --bg-page: #F6F4EF;
  --bg-surface: #FFFFFF;
  --bg-surface-deep: #EAE8E1;
  --bg-dark: #122320;
  --ink-1: #17231F;
  --ink-2: #55615C;
  --line: #DCE0D8;
  --primary: #0F4C46;
  --primary-2: #117A6B;
  --primary-soft: #E4F0EE;
  --accent: #F26B38;
  --accent-soft: #FDEBE2;
  --success: #3F7D57;
  --danger: #C44D3F;
  --radius-sm: 4px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 2px rgba(18,35,32,.04);
  --shadow-md: 0 8px 20px rgba(18,35,32,.08);
  --container-w: 1200px;
  --space-section: 88px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0;
  color: var(--ink-1);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--primary-2); }
ul, ol { list-style: none; }
input, button, textarea { font: inherit; border: none; outline: none; background: none; }
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }
section { padding: var(--space-section) 0; }
.section-lead { max-width: 720px; margin-bottom: 48px; }
.section-lead .eyebrow,
.page-head .eyebrow { font-size: 13px; font-weight: 700; letter-spacing: .1em; color: var(--primary-2); text-transform: uppercase; margin-bottom: 8px; }
@media (max-width: 768px) {
  :root { --space-section: 64px; }
  .container { padding: 0 16px; }
}

/* Header */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(18,35,32,.03);
}
.site-header .container { display: flex; flex-direction: column; }
.header-top { display: flex; align-items: center; gap: 24px; padding: 14px 0 10px; }
.brand { flex-shrink: 0; display: inline-flex; align-items: baseline; gap: 8px; line-height: 1.2; }
.brand-cn { font-size: 20px; font-weight: 800; color: var(--primary); }
.brand-region { font-size: 14px; font-weight: 400; color: var(--ink-2); border: 1px solid var(--line); border-radius: 6px; padding: 2px 8px; letter-spacing: .03em; }
.header-search {
  flex: 1;
  display: flex;
  align-items: center;
  max-width: 520px;
  margin: 0 auto;
  background: #F2F1EC;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  padding: 0 16px;
  height: 42px;
  transition: all .2s ease;
}
.header-search:focus-within {
  background: #fff;
  border-color: var(--primary-2);
  box-shadow: 0 0 0 3px rgba(18,122,107,.15);
}
.header-search .search-icon { flex-shrink: 0; width: 18px; height: 18px; color: var(--ink-2); }
.header-search input { flex: 1; min-width: 0; background: transparent; font-size: 14px; padding: 0 12px; }
.header-search input::placeholder { color: #8A948E; }
.header-btn { flex-shrink: 0; }
.main-nav {
  display: flex;
  justify-content: center;
  gap: 40px;
  border-top: 1px solid #F0EDE7;
  padding: 10px 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.main-nav::-webkit-scrollbar { display: none; }
.main-nav a {
  position: relative;
  font-size: 15px;
  font-weight: 600;
  padding: 6px 2px;
  white-space: nowrap;
  color: var(--ink-2);
  transition: color .2s;
}
.main-nav a:hover { color: var(--primary-2); }
.main-nav a.active { color: var(--primary-2); }
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 3px;
  border-radius: 3px;
  background: var(--accent);
}
@media (max-width: 768px) {
  .header-top { flex-wrap: wrap; row-gap: 10px; }
  .header-search { order: 3; flex-basis: 100%; max-width: 100%; }
  .main-nav { gap: 24px; justify-content: flex-start; }
  .brand-cn { font-size: 18px; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: 10px;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, opacity .15s;
  text-align: center;
  white-space: nowrap;
}
.btn:focus-visible { outline: 3px solid rgba(18,122,107,.35); outline-offset: 2px; }
.btn-accent { background: var(--accent); color: #fff; border: 1px solid var(--accent); }
.btn-accent:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(242,107,56,.28); color:#fff; }
.btn-accent:active { transform: translateY(0); opacity: .94; }
.btn-outline { background: #fff; color: var(--ink-1); border: 1px solid var(--line); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-outline:active { opacity: .9; }
.btn-sm { font-size: 13px; padding: 8px 20px; font-weight: 600; border-radius: 8px; }

/* Footer 共享样块 */
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,.78); padding: 56px 0 24px; margin-top: 0; }
.site-footer .brand .brand-cn { color:#fff; }
.footer-top { display: flex; gap: 60px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.12); }
.footer-brand { max-width: 320px; }
.footer-brand-text { margin-top: 12px; font-size: 14px; line-height: 1.7; color: rgba(255,255,255,.6); }
.footer-title { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,.7); transition: color .2s; }
.footer-links a:hover { color: #fff; }
.footer-note-list { font-size: 13px; color: rgba(255,255,255,.45); }
.footer-note-list li { margin-bottom: 8px; position: relative; padding-left: 14px; }
.footer-note-list li::before { content: ""; position: absolute; left: 0; top: 11px; width: 6px; height: 6px; border-radius: 50%; background: var(--primary-2); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; padding-top: 20px; font-size: 13px; color: rgba(255,255,255,.4); }
@media (max-width: 768px) {
  .footer-top { flex-direction: column; gap: 32px; }
  .footer-bottom { flex-direction: column; }
}

/* Category2 深绿徽章导航型 */
.cat2-header {
  background: var(--bg-dark);
  color: #fff;
  position: relative;
  overflow: hidden;
  padding: 88px 0 72px;
}
.cat2-header::after {
  content: "";
  position: absolute;
  right: -120px; top: -140px; width: 400px; height: 400px;
  background: radial-gradient(circle at 20% 20%, rgba(23,122,107,.55), transparent 60%);
  pointer-events: none;
}
.cat2-header .cat2-bg-overlay {
  position: absolute; inset: 0;
  background-image: url(/assets/images/backpic/back-1.webp);
  background-size: cover;
  background-position: center 20%;
  opacity: .12;
}
.cat2-header .container { position: relative; z-index: 2; }
.cat2-breadcrumb { font-size: 13px; color: rgba(255,255,255,.5); margin-bottom: 24px; }
.cat2-breadcrumb a { color: rgba(255,255,255,.7); }
.cat2-breadcrumb a:hover { color: #fff; }
.cat2-header .eyebrow { color: var(--accent); }
.badge-accent {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .05em;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
  text-transform: uppercase;
}
.cat2-header h1 { font-size: 44px; font-weight: 800; line-height: 1.2; margin-bottom: 16px; max-width: 800px; }
.cat2-header .subline { font-size: 17px; color: rgba(255,255,255,.7); max-width: 640px; line-height: 1.8; }
.cat2-header .header-meta { display: flex; gap: 24px; margin-top: 32px; font-size: 13px; color: rgba(255,255,255,.45); }
@media (max-width: 768px) {
  .cat2-header h1 { font-size: 32px; }
  .cat2-header { padding: 56px 0 48px; }
}

.cat2-main { background: var(--bg-page); padding: 64px 0 88px; }
.cat2-grid { display: grid; grid-template-columns: 1fr; }

/* 堆叠数据卡片 */
.data-stack { display: flex; flex-direction: column; }
.data-card {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr) 320px 120px;
  gap: 32px;
  align-items: center;
  padding: 40px 8px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-page);
  transition: background .2s ease;
}
.data-card:hover { background: #FBFAF6; }
.data-card .order-num { font-size: 42px; font-weight: 800; letter-spacing: -.01em; color: var(--primary-2); line-height: 1; opacity: .35; }
.data-card .data-content { min-width: 0; }
.data-card .data-content h2 { font-size: 24px; font-weight: 800; margin-bottom: 8px; }
.data-card .data-content h2 span { color: var(--ink-1); display: block; }
.data-card .data-content p { color: var(--ink-2); font-size: 15px; margin-bottom: 10px; }
.data-card .data-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.data-tag {
  display: inline-block;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: var(--radius-sm);
  line-height: 1.5;
}
.data-card .card-stat {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.6;
  border-left: 2px solid var(--line);
  padding-left: 20px;
}
.data-card .card-stat strong { font-weight: 800; font-size: 15px; color: var(--primary); display: block; }
.data-card .card-link { text-align: right; }
.data-card .card-link .btn { min-width: 100px; }
@media (max-width: 1024px) {
  .data-card { grid-template-columns: 60px 1fr 160px; }
  .data-card .card-link { grid-column: 2 / -1; text-align: left; margin-top: -18px; }
}
@media (max-width: 768px) {
  .data-card { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; padding: 32px 4px; }
  .data-card .order-num { font-size: 30px; margin-bottom: 0; }
  .data-card .card-stat { border-left: none; padding-left: 0; font-size: 14px; }
  .data-card .card-link { margin-top: 0; }
  .data-card .card-link .btn { width: auto; }
}

/* 信息图文区 */
.cat2-visual-row { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; margin-top: 72px; background: var(--bg-surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 40px; }
.cat2-viz-copy .kicker { color: var(--primary-2); font-weight: 700; font-size: 14px; margin-bottom: 8px; }
.cat2-viz-copy h3 { font-size: 28px; font-weight: 800; line-height: 1.3; margin-bottom: 16px; }
.cat2-viz-copy p { color: var(--ink-2); font-size: 15px; margin-bottom: 16px; }
.viz-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 24px; margin-top: 12px; }
.viz-list li { display: flex; gap: 8px; font-size: 14px; color: var(--ink-1); position: relative; }
.viz-list li::before { content: "✓"; font-weight: 800; color: var(--primary-2); flex-shrink: 0; }
.viz-img { aspect-ratio: 4/3; border-radius: var(--radius-md); overflow: hidden; background: var(--bg-surface-deep); }
.viz-img img { width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 1024px) {
  .cat2-visual-row { grid-template-columns: 1fr; padding: 24px; }
}
@media (max-width: 520px) {
  .viz-list { grid-template-columns: 1fr; }
}

/* 使用场景/适用人群横条 */
.cat2-audience { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; margin-top: 64px; }
.audience-chip {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 14px 22px;
  transition: box-shadow .2s, border-color .2s;
  box-shadow: var(--shadow-sm);
}
.audience-chip:hover { border-color: var(--primary-2); box-shadow: var(--shadow-md); }
.audience-chip .chip-user { font-size: 15px; font-weight: 600; color: var(--primary); }
.audience-chip .chip-desc { font-size: 14px; color: var(--ink-2); line-height: 1.5; }

/* FAQ */
.faq-section { background: var(--bg-surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.faq-list { max-width: 840px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
}
.faq-item:first-child { border-top: 1px solid var(--line); }
.faq-item summary {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  padding: 8px 4px;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-1);
  border-radius: 8px;
  transition: background .2s;
}
.faq-item summary:hover { color: var(--primary-2); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item .faq-icon { flex-shrink: 0; width: 18px; height: 18px; position: relative; opacity: .6; transition: transform .25s ease; }
.faq-item .faq-icon::before, .faq-item .faq-icon::after { content:""; position:absolute; background: var(--primary-2); border-radius: 2px; }
.faq-item .faq-icon::before { width: 2px; height: 18px; left: 8px; top: 0; }
.faq-item .faq-icon::after { width: 18px; height: 2px; left: 0; top: 8px; }
.faq-item[open] .faq-icon { transform: rotate(45deg); }
.faq-item .faq-answer { padding: 12px 8px 8px; color: var(--ink-2); font-size: 15px; line-height: 1.85; }
.faq-item .faq-answer p { margin-bottom: 8px; }
@media (max-width: 768px) {
  .faq-item summary { font-size: 15px; }
}

/* CTA band */
.cta-module { padding: 0; }
.cta-inner {
  background: var(--accent-soft);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
}
.cta-inner h3 { font-size: 30px; font-weight: 800; color: var(--ink-1); margin-bottom: 8px; }
.cta-inner p { color: var(--ink-2); font-size: 16px; max-width: 480px; margin: 0 auto 28px; }
@media (max-width: 640px) {
  .cta-inner { padding: 40px 16px; }
  .cta-inner h3 { font-size: 24px; }
}

/* shared block section spacer */
.section-with-bg { background: var(--bg-page); }
.section-white { background: var(--bg-surface); }

/* roulang page: category1 */
:root{
  --bg-page:#F6F4EF;
  --bg-surface:#FFFFFF;
  --bg-surface-deep:#EAE8E1;
  --bg-dark:#122320;
  --ink-1:#17231F;
  --ink-2:#55615C;
  --line:#DCE0D8;
  --primary:#0F4C46;
  --primary-2:#117A6B;
  --primary-soft:#E4F0EE;
  --accent:#F26B38;
  --accent-soft:#FDEBE2;
  --success:#3F7D57;
  --danger:#C44D3F;
  --shadow-sm:0 1px 2px rgba(18,35,32,.04);
  --shadow-md:0 8px 20px rgba(18,35,32,.08);
  --r-sm:4px;
  --r-md:12px;
  --r-pill:999px;
  --r-lg:24px;
  --container:1200px;
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
}
*,
*::before,
*::after{
  box-sizing:border-box;
  margin:0;
  padding:0;
}
html{
  scroll-behavior:smooth;
}
body{
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink-1);
  background:var(--bg-page);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{
  max-width:100%;
  display:block;
}
a{
  color:var(--primary);
  text-decoration:none;
  transition:color .2s ease;
}
a:hover{
  color:var(--primary-2);
}
button,
input{
  font-family:inherit;
  font-size:inherit;
}
svg{
  display:block;
}
.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.header-top{
  display:flex;
  align-items:center;
  gap:28px;
  padding:14px 0 12px;
}
.brand{
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  white-space:nowrap;
  flex-shrink:0;
}
.brand-cn{
  font-size:22px;
  font-weight:800;
  letter-spacing:0;
  color:var(--primary);
}
.brand-region{
  font-size:13px;
  font-weight:600;
  color:var(--ink-2);
}
.header-search{
  flex:1;
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
  background:var(--bg-surface-deep);
  border:1px solid transparent;
  border-radius:var(--r-pill);
  padding:10px 18px;
  transition:background .2s,border-color .2s,box-shadow .2s;
}
.header-search:focus-within{
  background:var(--bg-surface);
  border-color:var(--primary-2);
  box-shadow:0 0 0 3px rgba(18,122,107,.14);
}
.search-icon{
  width:17px;
  height:17px;
  color:var(--ink-2);
  flex-shrink:0;
}
.header-search input{
  flex:1;
  border:none;
  outline:none;
  background:transparent;
  font-size:15px;
  color:var(--ink-1);
  min-width:0;
}
.header-search input::placeholder{
  color:#8b938e;
}
.header-btn{
  flex-shrink:0;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  border-radius:10px;
  padding:12px 22px;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
  cursor:pointer;
  border:1px solid transparent;
}
.btn-accent{
  background:var(--accent);
  color:#fff;
}
.btn-accent:hover{
  background:#df5a2c;
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 6px 16px rgba(242,107,56,.2);
}
.btn-accent:active{
  transform:translateY(0);
  opacity:.94;
}
.btn-primary{
  background:var(--primary);
  color:#fff;
}
.btn-primary:hover{
  background:#0a3834;
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 8px 18px rgba(15,76,70,.18);
}
.btn-outline{
  background:#fff;
  border-color:var(--line);
  color:var(--ink-1);
}
.btn-outline:hover{
  border-color:var(--primary);
  color:var(--primary);
}
.btn-sm{
  padding:8px 14px;
  font-size:14px;
  border-radius:8px;
}
.main-nav{
  display:flex;
  gap:38px;
  border-top:1px solid var(--line);
  padding:0;
  overflow-x:auto;
  scrollbar-width:none;
}
.main-nav::-webkit-scrollbar{
  display:none;
}
.main-nav a{
  position:relative;
  color:var(--ink-2);
  font-size:15px;
  font-weight:500;
  white-space:nowrap;
  padding:12px 0 13px;
}
.main-nav a:hover{
  color:var(--primary-2);
}
.main-nav a.active{
  color:var(--primary-2);
  font-weight:700;
}
.main-nav a.active::after{
  content:'';
  position:absolute;
  left:0;
  bottom:0;
  width:46px;
  height:3px;
  border-radius:4px 4px 0 0;
  background:var(--accent);
}
.page-head{
  position:relative;
  overflow:hidden;
  background:
    linear-gradient(100deg,rgba(246,244,239,.95) 0%,rgba(246,244,239,.82) 52%,rgba(228,240,238,.58) 100%),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat var(--bg-surface-deep);
}
.page-head::before{
  content:'';
  position:absolute;
  top:-110px;
  right:-40px;
  width:360px;
  height:360px;
  background:radial-gradient(circle at center,rgba(15,76,70,.08) 0,transparent 68%);
  z-index:0;
}
.page-head .container{
  position:relative;
  z-index:1;
  padding-top:54px;
  padding-bottom:62px;
}
.crumbs{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--ink-2);
  margin-bottom:28px;
}
.crumbs a{
  color:var(--ink-2);
}
.crumbs a:hover{
  color:var(--primary);
}
.crumbs span{
  color:#9a9f9b;
}
.page-kicker{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:var(--primary-soft);
  color:var(--primary);
  font-size:13px;
  font-weight:600;
  padding:6px 12px;
  border-radius:var(--r-pill);
  margin-bottom:18px;
}
.page-head h1{
  font-size:36px;
  line-height:1.3;
  font-weight:800;
  letter-spacing:0;
  margin-bottom:18px;
}
.page-subtitle{
  max-width:680px;
  font-size:18px;
  line-height:1.8;
  color:var(--ink-2);
}
.pill-row{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:24px;
}
.tag{
  display:inline-block;
  padding:5px 12px;
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.72);
  border:1px solid rgba(220,224,216,.8);
  color:var(--ink-2);
  font-size:13px;
}
.page-body{
  padding:84px 0;
  scroll-margin-top:0;
}
.guide-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:56px;
  align-items:start;
}
.guide-main{
  background:var(--bg-surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:44px 44px 48px;
  box-shadow:var(--shadow-sm);
}
.guide-lead{
  font-size:17px;
  line-height:1.9;
  color:var(--ink-1);
  border-left:3px solid var(--primary-2);
  padding-left:18px;
  margin-bottom:44px;
}
.module-block{
  margin-bottom:42px;
  padding-bottom:40px;
  border-bottom:1px dashed var(--line);
}
.module-block:last-of-type{
  margin-bottom:30px;
  padding-bottom:0;
  border-bottom:none;
}
.module-head{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:14px;
}
.module-num{
  font-size:13px;
  font-weight:800;
  color:#fff;
  background:var(--primary);
  width:30px;
  height:30px;
  border-radius:50%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.module-block h2,
.module-head h2{
  font-size:21px;
  font-weight:700;
  line-height:1.5;
  color:var(--ink-1);
  margin:0;
}
.module-block p{
  color:var(--ink-2);
  line-height:1.9;
  padding-left:42px;
}
.guide-main h3{
  font-size:18px;
  color:var(--ink-1);
  margin:36px 0 16px;
  position:relative;
  padding-left:14px;
}
.guide-main h3::before{
  content:'';
  position:absolute;
  top:7px;
  left:0;
  width:4px;
  height:20px;
  border-radius:4px;
  background:var(--primary-2);
}
.dotline-list{
  list-style:none;
  margin:20px 0 0;
}
.dotline-list li{
  position:relative;
  padding:14px 4px 14px 24px;
  border-bottom:1px dashed var(--line);
  color:var(--ink-2);
  line-height:1.8;
}
.dotline-list li::before{
  content:'';
  position:absolute;
  left:2px;
  top:25px;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--accent);
}
.dotline-list li:last-child{
  border-bottom:none;
}
.bottom-read-links{
  margin-top:44px;
  padding-top:36px;
  border-top:1px dashed var(--line);
}
.bottom-read-links > span{
  font-size:14px;
  font-weight:700;
  color:var(--ink-1);
}
.link-row{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:16px;
}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:600;
  color:var(--primary);
  border-bottom:1px solid transparent;
  padding:4px 0;
}
.text-link:hover{
  color:var(--primary-2);
  border-bottom-color:var(--primary-2);
}
.text-link svg{
  width:14px;
  height:14px;
}
.guide-aside{
  display:flex;
  flex-direction:column;
  gap:20px;
  position:sticky;
  top:132px;
}
.aside-figure{
  background:var(--bg-surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
}
.aside-figure img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
}
.aside-figure figcaption{
  font-size:13px;
  line-height:1.7;
  color:var(--ink-2);
  padding:12px 18px;
}
.paper-card{
  background:var(--bg-surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:24px;
  box-shadow:var(--shadow-sm);
}
.paper-card h3{
  font-size:16px;
  font-weight:700;
  color:var(--ink-1);
  margin-bottom:16px;
  padding-left:12px;
  position:relative;
}
.paper-card h3::before{
  content:'';
  position:absolute;
  left:0;
  top:5px;
  width:4px;
  height:17px;
  border-radius:4px;
  background:var(--accent);
}
.read-path{
  counter-reset:path;
  list-style:none;
  margin:0;
}
.read-path li{
  position:relative;
  color:var(--ink-2);
  line-height:1.8;
  padding:0 0 18px 34px;
}
.read-path li:last-child{
  padding-bottom:0;
}
.read-path li::before{
  counter-increment:path;
  content:counter(path,decimal-leading-zero);
  position:absolute;
  left:0;
  top:2px;
  width:24px;
  height:24px;
  border:1px solid var(--primary-soft);
  background:var(--primary-soft);
  color:var(--primary);
  font-size:12px;
  font-weight:700;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
}
.tip-card{
  border-left:4px solid var(--primary-2);
  background:var(--primary-soft);
  border-radius:0 var(--r-md) var(--r-md) 0;
}
.term-list{
  list-style:none;
  margin-top:6px;
}
.term-list li{
  border-bottom:1px solid rgba(220,224,216,.7);
  padding:13px 0;
  display:grid;
  grid-template-columns:92px 1fr;
  gap:12px;
  font-size:14px;
  line-height:1.8;
}
.term-list li:last-child{
  border-bottom:none;
  padding-bottom:0;
}
.term-list strong{
  color:var(--ink-1);
  font-weight:700;
}
.term-list span{
  color:var(--ink-2);
}
.faq-section{
  background:var(--bg-surface);
  padding:90px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-head{
  max-width:760px;
  margin-bottom:40px;
}
.section-head h2{
  font-size:28px;
  font-weight:800;
  line-height:1.4;
  margin-bottom:12px;
}
.section-head p{
  color:var(--ink-2);
  font-size:16px;
}
.faq-list{
  max-width:760px;
}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--bg-page);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s,background .2s;
}
.faq-item:hover,
.faq-item[open]{
  background:var(--bg-surface);
  border-color:var(--primary-2);
}
.faq-item summary{
  list-style:none;
  display:flex;
  justify-content:space-between;
  gap:16px;
  align-items:center;
  cursor:pointer;
  padding:20px 24px;
  font-size:16px;
  font-weight:600;
  color:var(--ink-1);
  line-height:1.6;
}
.faq-item summary::-webkit-details-marker{
  display:none;
}
.faq-item .faq-icon{
  flex-shrink:0;
  width:28px;
  height:28px;
  border-radius:50%;
  background:var(--primary-soft);
  display:flex;
  align-items:center;
  justify-content:center;
  transition:transform .2s,background .2s;
  color:var(--primary);
}
.faq-item[open] .faq-icon{
  transform:rotate(45deg);
  background:var(--accent-soft);
  color:var(--accent);
}
.faq-answer{
  padding:0 26px 22px 26px;
  color:var(--ink-2);
  font-size:16px;
  line-height:1.9;
  border-top:1px dashed var(--line);
  margin-top:0;
  padding-top:20px;
}
.faq-answer p{
  margin-bottom:8px;
}
.faq-answer p:last-child{
  margin-bottom:0;
}
.cta-section{
  background:var(--accent-soft);
  padding:100px 0;
  overflow:hidden;
  position:relative;
}
.cta-section::before{
  content:'';
  position:absolute;
  right:-100px;
  bottom:-160px;
  width:420px;
  height:420px;
  background:radial-gradient(circle at center,rgba(242,107,56,.1),transparent 68%);
}
.cta-inner{
  max-width:760px;
}
.cta-inner h2{
  font-size:30px;
  font-weight:800;
  line-height:1.4;
  color:var(--ink-1);
  margin-bottom:16px;
}
.cta-inner p{
  font-size:17px;
  color:var(--ink-2);
  margin-bottom:30px;
  line-height:1.8;
}
.site-footer{
  background:var(--bg-dark);
  color:rgba(255,255,255,.78);
  padding:74px 0 0;
}
.footer-top{
  display:grid;
  grid-template-columns:1.3fr .8fr .9fr;
  gap:52px;
  padding-bottom:44px;
}
.footer-brand .brand-cn{
  color:#fff;
}
.footer-brand .brand-region{
  color:rgba(255,255,255,.66);
}
.footer-brand-text{
  margin-top:18px;
  font-size:14px;
  line-height:1.85;
  color:rgba(255,255,255,.62);
  max-width:360px;
}
.footer-title{
  color:#fff;
  font-weight:700;
  font-size:15px;
  margin-bottom:16px;
}
.footer-links{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-links a{
  color:rgba(255,255,255,.7);
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  transition:color .2s,transform .2s;
}
.footer-links a::before{
  content:'';
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--accent);
  flex-shrink:0;
}
.footer-links a:hover{
  color:#fff;
}
.footer-note-list{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:10px;
  font-size:14px;
  color:rgba(255,255,255,.52);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px 24px;
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;
  font-size:13px;
  color:rgba(255,255,255,.48);
}
.footer-domain{
  color:rgba(255,255,255,.42);
}
:focus-visible{
  outline:3px solid rgba(242,107,56,.45);
  outline-offset:2px;
  border-radius:6px;
}
@media (max-width:1100px){
  .guide-grid{
    grid-template-columns:1fr;
    gap:36px;
  }
  .guide-aside{
    position:static;
    flex-direction:column;
  }
  .footer-top{
    grid-template-columns:1fr 1fr;
  }
}
@media (max-width:768px){
  .container{
    padding:0 18px;
  }
  .header-top{
    flex-wrap:wrap;
    gap:14px;
    padding:14px 0 10px;
  }
  .header-search{
    order:3;
    flex-basis:100%;
    width:100%;
    padding:9px 16px;
  }
  .header-btn{
    margin-left:auto;
  }
  .main-nav{
    gap:24px;
  }
  .page-head .container{
    padding-top:40px;
    padding-bottom:48px;
  }
  .page-head h1{
    font-size:28px;
  }
  .page-subtitle{
    font-size:16px;
  }
  .page-body{
    padding:56px 0;
  }
  .guide-main{
    padding:28px 22px;
  }
  .guide-lead{
    font-size:16px;
  }
  .module-block p{
    padding-left:0;
  }
  .faq-section,
  .cta-section{
    padding:64px 0;
  }
  .cta-inner h2{
    font-size:24px;
  }
  .footer-top{
    grid-template-columns:1fr;
    gap:32px;
  }
}
@media (max-width:520px){
  .brand-cn{
    font-size:19px;
  }
  .brand-region{
    font-size:12px;
  }
  .header-top{
    gap:12px;
    padding-top:12px;
  }
  .page-head h1{
    font-size:25px;
  }
  .page-subtitle{
    font-size:15px;
    line-height:1.8;
  }
  .module-block h2,
  .module-head h2{
    font-size:18px;
  }
  .module-head{
    gap:8px;
  }
  .module-num{
    width:26px;
    height:26px;
    font-size:12px;
  }
  .paper-card{
    padding:18px;
  }
  .footer-bottom{
    flex-direction:column;
  }
}

/* roulang page: category3 */
:root{
  --bg-page: #F6F4EF;
  --bg-surface: #FFFFFF;
  --bg-surface-deep: #EAE8E1;
  --bg-dark: #122320;
  --ink-1: #17231F;
  --ink-2: #55615C;
  --line: #DCE0D8;
  --primary: #0F4C46;
  --primary-2: #117A6B;
  --primary-soft: #E4F0EE;
  --accent: #F26B38;
  --accent-soft: #FDEBE2;
  --success: #3F7D57;
  --danger: #C44D3F;
  --radius-card: 12px;
  --radius-input: 999px;
  --radius-img: 24px;
  --shadow-card: 0 1px 2px rgba(18,35,32,.04);
  --shadow-hover: 0 8px 20px rgba(18,35,32,.08);
  --container-width: 1200px;
  --font-sans: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:0;
  background:var(--bg-page);
  color:var(--ink-1);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
input{font-family:inherit}
ul,ol{list-style-position:inside}
.container{
  max-width:var(--container-width);
  margin:0 auto;
  padding:0 24px;
}
/*
  共享 Header
*/
.site-header{
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  position:relative;
  width:100%;
  z-index:20;
}
.site-header.scrolled{box-shadow:0 4px 12px rgba(18,35,32,.06)}
.header-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:14px 0 10px;
}
.brand{
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  font-weight:800;
  color:var(--primary);
  white-space:nowrap;
}
.brand-cn{font-size:24px;letter-spacing:.5px}
.brand-region{
  font-size:15px;
  font-weight:400;
  color:var(--ink-2);
  border:1px solid var(--line);
  border-radius:999px;
  padding:2px 10px;
  line-height:1.6;
}
.header-search{
  flex:1;
  max-width:560px;
  min-width:240px;
  display:flex;
  align-items:center;
  background:#f1f2ee;
  border:1px solid transparent;
  border-radius:var(--radius-input);
  padding:0 16px;
  height:46px;
  transition:background .2s,border-color .2s,box-shadow .2s;
}
.header-search:focus-within{
  background:#fff;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(18,122,107,.15);
}
.header-search .search-icon{
  width:18px;height:18px;color:var(--ink-2);flex:none;margin-right:10px;
}
.header-search input{
  flex:1;
  border:none;
  outline:none;
  background:transparent;
  font-size:15px;
  color:var(--ink-1);
}
.header-search input::placeholder{color:#8A938D}
.header-btn{flex:none}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  border-radius:10px;
  padding:12px 24px;
  border:1px solid transparent;
  transition:transform .2s ease, background .2s ease, border-color .2s, box-shadow .2s, color .2s;
  text-decoration:none;
  cursor:pointer;
  white-space:nowrap;
}
.btn:focus-visible{outline:3px solid rgba(242,107,56,.4);outline-offset:2px}
.btn-accent{
  background:var(--accent);
  color:#fff;
}
.btn-accent:hover{
  background:#de5527;
  transform:translateY(-2px);
  box-shadow:0 10px 18px rgba(242,107,56,.2);
}
.btn-accent:active{transform:translateY(0);opacity:.94}
.btn-sm{padding:8px 18px;font-size:14px;border-radius:8px}
.main-nav{
  display:flex;
  align-items:center;
  gap:34px;
  padding:0 0 12px;
  overflow-x:auto;
  scrollbar-width:none;
}
.main-nav::-webkit-scrollbar{display:none}
.main-nav a{
  font-size:15px;
  font-weight:500;
  color:var(--ink-2);
  padding:6px 0 8px;
  border-bottom:3px solid transparent;
  white-space:nowrap;
  transition:color .2s;
}
.main-nav a:hover{color:var(--primary-2)}
.main-nav a.active{
  color:var(--primary-2);
  border-bottom-color:var(--accent);
  font-weight:600;
}
/* 面包屑 */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  font-size:13px;
  color:var(--ink-2);
  padding:24px 0 0;
}
.breadcrumb a{color:var(--primary);font-weight:500}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb .sep{color:#A9B2AB}
/* 页头 banner */
.cat3-hero{
  background:var(--bg-dark);
  color:#fff;
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;
  background-position:center;
  position:relative;
  overflow:hidden;
}
.cat3-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg, rgba(9,28,25,.96) 0%, rgba(9,28,25,.78) 40%, rgba(9,28,25,.35) 100%);
  z-index:1;
}
.category-hero-inner{
  position:relative;
  z-index:2;
  padding:72px 0 76px;
  max-width:860px;
}
.cat-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:rgba(242,107,56,.15);
  color:#ff9a70;
  border:1px solid rgba(242,107,56,.45);
  padding:5px 14px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.2px;
  margin-bottom:20px;
}
.cat3-hero h1{
  font-size:44px;
  line-height:1.25;
  font-weight:800;
  color:#fff;
  letter-spacing:1px;
  margin-bottom:16px;
}
.cat3-hero p{
  font-size:17px;
  line-height:1.8;
  color:rgba(255,255,255,.86);
  max-width:720px;
  margin-top:6px;
}
/* 主体区 */
.cat3-main{
  padding:72px 0 96px;
}
.cat3-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) 360px;
  gap:56px;
}
/* 锚点目录 */
.toc-side{
  position:sticky;
  top:24px;
  align-self:start;
  border:1px solid var(--line);
  background:var(--bg-surface);
  border-radius:var(--radius-card);
  padding:24px 20px;
  box-shadow:var(--shadow-card);
}
.toc-side h2{
  font-size:16px;
  font-weight:800;
  color:var(--ink-1);
  margin-bottom:16px;
  display:flex;
  align-items:center;
  gap:8px;
}
.toc-side h2::after{
  content:"";
  width:18px;
  height:3px;
  background:var(--accent);
  display:inline-block;
}
.toc-list{list-style:none}
.toc-list li+li{margin-top:2px}
.toc-list a{
  display:flex;
  gap:10px;
  font-size:14px;
  padding:9px 12px;
  color:var(--ink-2);
  border-radius:8px;
  line-height:1.5;
  transition:background .2s,color .2s;
}
.toc-list a:hover{background:var(--primary-soft);color:var(--primary)}
.toc-list a i{width:16px;color:var(--primary-2);flex:none;margin-top:4px;font-size:12px}
/* 内容区块 */
.faq-block{scroll-margin-top:30px; margin-bottom:60px; background:var(--bg-surface); border:1px solid var(--line); border-radius:18px; padding:48px; box-shadow:var(--shadow-card);}
.faq-block:last-child{margin-bottom:0}
.faq-block .block-head{
  display:flex;
  gap:16px;
  margin-bottom:34px;
  align-items:flex-start;
  padding-bottom:20px;
  border-bottom:1px dashed var(--line);
}
.faq-block .block-index{
  font-size:24px;
  font-weight:800;
  color:var(--primary);
  background:var(--primary-soft);
  width:50px;
  height:50px;
  border-radius:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  flex:none;
}
.faq-block h2{
  font-size:26px;
  font-weight:800;
  line-height:1.4;
  color:var(--ink-1);
  margin:2px 0 8px;
}
.block-desc{color:var(--ink-2);font-size:15px;line-height:1.8}
/* question qa list */
.qa-list{display:flex;flex-direction:column}
.qa-item{
  padding:26px 0;
  border-bottom:1px solid var(--line);
}
.qa-item:last-child{border-bottom:none;padding-bottom:6px}
.qa-item h3{
  font-size:18px;
  font-weight:700;
  color:var(--ink-1);
  margin-bottom:8px;
  padding-left:22px;
  position:relative;
  line-height:1.6;
}
.qa-item h3::before{
  content:"Q";
  position:absolute;
  left:0;
  top:2px;
  width:18px;
  height:18px;
  background:var(--accent-soft);
  color:var(--accent);
  font-size:11px;
  font-weight:800;
  border-radius:6px;
  text-align:center;
  line-height:18px;
}
.qa-item p{
  color:var(--ink-2);
  font-size:15.5px;
  line-height:1.9;
  padding-left:22px;
}
.qa-item p+p{margin-top:6px}
/* 下面小标签 */
.tags-row{
  margin-top:26px;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.tag-mini{
  display:inline-flex;
  align-items:center;
  gap:5px;
  padding:4px 12px;
  background:var(--primary-soft);
  color:var(--primary);
  font-size:13px;
  border-radius:999px;
}
/* 侧栏模块 */
.side-helper{
  background:var(--bg-surface);
  border:1px solid var(--line);
  border-radius:18px;
  margin-bottom:20px;
  padding:26px 24px;
  box-shadow:var(--shadow-card);
}
.side-helper h3{
  font-size:20px;
  font-weight:800;
  color:var(--ink-1);
  margin-bottom:18px;
  display:flex;
  align-items:center;
  gap:10px;
}
.side-helper h3::after{
  content:"";
  height:3px;
  width:20px;
  background:var(--accent);
}
.side-helper p{font-size:14.5px;color:var(--ink-2);line-height:1.8;margin-bottom:12px}
.data-mini-list{list-style:none;display:flex;flex-direction:column;gap:12px;margin:14px 0 0}
.data-mini-list li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--ink-1);}
.data-mini-list li i{color:var(--primary-2);margin-top:5px;font-size:13px}
.side-data-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1px;
  background:var(--line);
  border-radius:14px;
  overflow:hidden;
  margin-bottom:16px;
}
.side-data-cell{
  background:#f8f7f2;
  text-align:center;
  padding:22px 8px;
}
.side-data-cell strong{
  display:block;
  font-size:28px;
  font-weight:800;
  color:var(--primary);
  line-height:1.3;
}
.side-data-cell span{font-size:13px;color:var(--ink-2)}
/* 卡片 */
.related-card{
  background:var(--bg-surface);
  border:1px solid var(--line);
  border-radius:16px;
  padding:28px 24px;
  margin-top:32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
}
.related-card h3{
  font-size:18px;
  font-weight:800;
  color:var(--ink-1);
  margin-bottom:8px;
}
.related-card p{font-size:14px;color:var(--ink-2);margin-bottom:14px}
/* CTA */
.cta-section{
  padding:0 0 96px;
}
.cta-container{
  background:var(--accent-soft);
  border-radius:24px;
  padding:56px 56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  flex-wrap:wrap;
  position:relative;
  overflow:hidden;
}
.cta-container h2{
  font-size:28px;
  font-weight:800;
  color:var(--ink-1);
  margin-bottom:10px;
}
.cta-container p{color:var(--ink-2);font-size:15px;max-width:620px}
.cta-container .btn-ghost-dark{
  background:var(--primary);
  color:#fff;
}
.cta-container .btn-ghost-dark:hover{
  background:var(--primary-2);
  transform:translateY(-2px);
}
/* footer 共享 */
.site-footer{
  background:var(--bg-dark);
  color:#B8C4BE;
  padding:60px 0 0;
  font-size:14px;
  line-height:1.75;
}
.site-footer .brand-cn{color:#fff}
.footer-top{
  display:grid;
  grid-template-columns:2.2fr 1fr 1.5fr;
  gap:56px;
  padding-bottom:48px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-brand-text{
  margin-top:16px;
  max-width:360px;
  font-size:14px;
  color:#AAB7B1;
  line-height:1.85;
}
.footer-title{
  font-size:15px;
  font-weight:700;
  color:#fff;
  margin-bottom:16px;
  letter-spacing:.3px;
}
.footer-links,.footer-note-list{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:8px;
}
.footer-links a{color:#AAB7B1}
.footer-links a:hover{color:#fff}
.footer-note-list li{color:#AAB7B1;font-size:13px}
.footer-bottom{
  padding:24px 0;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px;
  color:#7E8D86;
  font-size:13px;
}
/* 响应式 */
@media(max-width:1024px){
  .cat3-grid{grid-template-columns:1fr;gap:44px}
  .toc-side{position:relative;top:auto}
}
@media(max-width:768px){
  .container{padding:0 16px}
  .header-top{flex-wrap:wrap}
  .header-search{
    order:3;
    flex-basis:100%;
    min-width:100%;
  }
  .cat3-hero h1{font-size:34px}
  .hero-sub{font-size:15px}
  .faq-block{padding:30px 20px}
  .faq-block h2{font-size:22px}
  .footer-top{grid-template-columns:1fr;gap:40px}
  .footer-brand-text{max-width:100%}
  .cta-container{padding:40px 24px;flex-direction:column;align-items:flex-start}
  .cta-container .btn{margin-top:8px}
  .main-nav{gap:28px}
}
@media(max-width:520px){
  .cat3-hero h1{font-size:28px}
  .header-btn{display:none}
  .brand-cn{font-size:20px}
  .cat3-hero-inner{padding:48px 0 56px}
  .related-card{align-items:flex-start;flex-direction:column}
  .cat3-main{padding:56px 0 72px}
}