/* roulang page: index */
:root {
  --brand: #2b6cb0;
  --brand-dark: #1f5384;
  --brand-deep: #17436c;
  --brand-light: #eaf2fa;
  --accent: #f77a3c;
  --accent-dark: #dc6427;
  --success: #2e9e6b;
  --bg: #f7fafc;
  --panel: #ffffff;
  --text: #16232e;
  --text-soft: #35434f;
  --muted: #7a8996;
  --border: #e2eaf2;
  --ribbon: #2b6cb0;
  --shadow-xs: 0 1px 2px rgba(16, 35, 58, .04);
  --shadow-sm: 0 2px 4px rgba(16, 35, 58, .04), 0 10px 24px rgba(16, 35, 58, .04);
  --shadow-md: 0 2px 4px rgba(16, 35, 58, .05), 0 14px 32px rgba(16, 35, 58, .06);
  --shadow-hover: 0 4px 10px rgba(16, 35, 58, .06), 0 22px 44px rgba(16, 35, 58, .1);
  --radius-xl: 22px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --trans-fast: 180ms ease;
  --trans-base: 220ms ease;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text-soft);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
body.cms-lock {
  overflow: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--trans-fast), background var(--trans-fast), border-color var(--trans-fast), box-shadow var(--trans-fast), transform var(--trans-fast);
}
button {
  font-family: inherit;
  border: 0;
  background: none;
  cursor: pointer;
  color: inherit;
}
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 8px;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.top-ribbon {
  height: 3px;
  background: var(--ribbon);
  position: relative;
  z-index: 100;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 18px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--brand);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px rgba(43, 108, 176, .18);
}
.brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  font-weight: 700;
  color: var(--text);
  font-size: 20px;
  letter-spacing: .02em;
}
.brand-name small {
  font-size: 11px;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: .1em;
  margin-top: 2px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  padding: 9px 16px;
  font-size: 15px;
  border-radius: 999px;
  color: var(--text-soft);
  font-weight: 500;
  white-space: nowrap;
  transition: background var(--trans-fast), color var(--trans-fast);
}
.nav-link:hover {
  background: var(--brand-light);
  color: var(--brand);
}
.nav-link.active {
  background: rgba(43, 108, 176, .1);
  color: var(--brand);
  font-weight: 600;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  padding: 10px 20px;
  transition: transform var(--trans-fast), box-shadow var(--trans-fast), background var(--trans-fast), color var(--trans-fast);
}
.btn:active {
  transform: translateY(0);
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, .08);
}
.btn-accent {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 20px rgba(247, 122, 60, .22);
}
.btn-accent:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 14px 26px rgba(247, 122, 60, .28);
}
.btn-secondary {
  border: 1px solid #ccdae6;
  background: var(--panel);
  color: var(--brand);
}
.btn-secondary:hover {
  border-color: var(--brand);
  background: var(--brand-light);
  transform: translateY(-2px);
}
.btn-lg {
  padding: 14px 26px;
  font-size: 16px;
  border-radius: 12px;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav-toggle {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: none;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  color: var(--text);
}
.nav-toggle:hover {
  background: var(--brand-light);
}
.nav-toggle svg {
  width: 22px;
  height: 22px;
}
.hero {
  position: relative;
  background-color: #f2f7fc;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-position: center right;
  background-size: cover;
  background-repeat: no-repeat;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: #f7fafc;
  opacity: .86;
  z-index: 1;
}
.hero::after {
  content: "";
  position: absolute;
  top: -160px;
  right: -80px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: rgba(43, 108, 176, .06);
  z-index: 1;
  pointer-events: none;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(460px, .95fr);
  gap: 60px;
  align-items: center;
  padding-top: 96px;
  padding-bottom: 110px;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(43, 108, 176, .09);
  color: var(--brand);
  border: 1px solid rgba(43, 108, 176, .16);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(34px, 4.6vw, 52px);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--text);
  margin: 0 0 18px;
  font-weight: 800;
}
.hero-sub {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-soft);
  max-width: 540px;
  margin: 0 0 30px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-bottom: 24px;
}
.compat-line {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
  padding-top: 2px;
}
.compat-line svg {
  width: 18px;
  height: 18px;
  color: var(--success);
  flex-shrink: 0;
}
.hero-visual {
  position: relative;
}
.visual-frame {
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-hover);
  border: 1px solid rgba(224, 234, 244, .7);
  overflow: hidden;
  padding-bottom: 10px;
}
.visual-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
}
.visual-bar i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #cfdde9;
  display: block;
}
.visual-bar i:first-child {
  background: #f4a48c;
}
.visual-bar i:nth-child(2) {
  background: #f2cd8b;
}
.visual-bar i:nth-child(3) {
  background: #9bc9a8;
}
.visual-bar span {
  margin-left: 8px;
  font-size: 12px;
  color: var(--muted);
  background: #f1f5f9;
  padding: 3px 12px;
  border-radius: 999px;
}
.visual-media img {
  width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 10;
  max-height: 360px;
}
.visual-caption {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 16px 2px;
  font-size: 13px;
  color: var(--muted);
}
.visual-caption strong {
  color: var(--text-soft);
  font-weight: 600;
}
.section {
  padding: 96px 0;
}
.section-alt {
  background: #eef5fb;
}
.section-head {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 44px;
}
.head-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 14px;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  line-height: 1;
  box-shadow: 0 8px 18px rgba(43, 108, 176, .2);
}
.section-head h2 {
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 8px;
}
.section-head p {
  color: var(--muted);
  margin: 0;
  font-size: 15px;
  max-width: 680px;
}
.feature-strip {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding: 4px 4px 18px;
  scroll-snap-type: x proximity;
}
.feature-card {
  flex: 0 0 340px;
  scroll-snap-align: start;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--trans-base), transform var(--trans-base);
  display: flex;
  flex-direction: column;
}
.feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.feature-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform .3s ease;
}
.feature-card:hover .feature-media img {
  transform: scale(1.03);
}
.feature-body {
  padding: 20px 22px 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}
.pill {
  background: var(--brand-light);
  color: var(--brand);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .02em;
}
.feature-body h3 {
  margin: 4px 0 0;
  color: var(--text);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.45;
}
.feature-body p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}
.scroll-hint {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  margin-top: 4px;
}
.req-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
  margin-top: 10px;
}
.req-card {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  padding: 30px;
}
.req-card.recommended {
  border-top: 4px solid var(--brand);
}
.req-card.basic {
  border-top: 4px solid #b8cbd9;
}
.req-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}
.req-header h3 {
  margin: 0;
  font-size: 20px;
  color: var(--text);
  font-weight: 700;
}
.req-badge {
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  background: #b8cbd9;
}
.req-card.recommended .req-badge {
  background: var(--brand);
}
.req-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.req-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.6;
}
.req-list li svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--brand);
  margin-top: 3px;
}
.req-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  background: #fff;
  border: 1px dashed #c7d7e5;
  border-radius: var(--radius-lg);
  margin-top: 24px;
  padding: 18px 22px;
}
.req-note p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}
.review-wrap {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}
.score-card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 28px;
  position: sticky;
  top: 100px;
}
.score-number {
  font-size: 42px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}
.score-number small {
  font-size: 16px;
  color: var(--muted);
  font-weight: 400;
}
.stars {
  font-size: 19px;
  color: #f5b544;
  letter-spacing: 3px;
  margin: 8px 0 4px;
}
.score-desc {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 22px;
}
.bar-row {
  display: grid;
  grid-template-columns: 34px 1fr 36px;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--muted);
  margin-top: 9px;
}
.bar-track {
  height: 7px;
  background: #eef2f6;
  border-radius: 999px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--brand);
}
.bar-row .pct {
  text-align: right;
}
.review-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.review-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--trans-base), transform var(--trans-base);
}
.review-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}
.review-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.review-avatar {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: #fff;
  background: var(--brand);
  font-size: 14px;
}
.review-top .name {
  font-weight: 600;
  color: var(--text);
  font-size: 14px;
}
.review-card p {
  margin: 0;
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.75;
}
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0 4px;
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--trans-fast);
}
.faq-item[open] {
  box-shadow: var(--shadow-sm);
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  user-select: none;
  border-radius: 12px;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--brand-light);
  color: var(--brand);
  font-size: 20px;
  font-weight: 400;
  transition: transform var(--trans-fast), background var(--trans-fast);
}
.faq-item[open] summary::after {
  transform: rotate(135deg);
  background: var(--brand);
  color: #fff;
}
.faq-item summary:hover {
  background: #fafcfe;
}
.faq-answer {
  padding: 0 22px 22px;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.9;
}
.cta-banner {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background-color: #10263a;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-position: center;
  background-size: cover;
  padding: 76px 24px;
  text-align: center;
}
.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(15, 35, 53, .78);
  z-index: 1;
}
.cta-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}
.cta-content h2 {
  color: #fff;
  font-size: clamp(26px, 3vw, 36px);
  margin: 0 0 14px;
}
.cta-content p {
  color: rgba(255, 255, 255, .82);
  margin: 0 auto 28px;
  max-width: 560px;
  font-size: 16px;
}
.news-section {
  padding-top: 96px;
  padding-bottom: 100px;
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.news-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 22px 20px;
  box-shadow: var(--shadow-xs);
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--trans-base), transform var(--trans-base);
}
.news-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.news-topline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 13px;
}
.news-cat {
  background: rgba(43, 108, 176, .09);
  color: var(--brand);
  padding: 4px 12px;
  border-radius: 999px;
  font-weight: 500;
}
.news-topline time {
  color: var(--muted);
  white-space: nowrap;
}
.news-card h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  font-weight: 600;
}
.news-card h3 a:hover {
  color: var(--brand);
}
.news-card p {
  margin: 12px 0 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.read-more {
  margin-top: auto;
  color: var(--brand);
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.read-more:hover {
  color: var(--accent);
  gap: 8px;
}
.read-more svg,
.read-more .arrow {
  transition: transform 180ms ease;
}
.empty-list {
  border: 2px dashed #c8d9e8;
  border-radius: var(--radius-lg);
  padding: 50px 20px;
  text-align: center;
  color: var(--muted);
  font-size: 15px;
  background: #fbfdfe;
  grid-column: 1 / -1;
}
.empty-list svg {
  width: 42px;
  height: 42px;
  margin: 0 auto 12px;
  opacity: .55;
}
.site-footer {
  background: #1b2a38;
  color: rgba(255, 255, 255, .78);
  padding: 70px 0 0;
  margin-top: 20px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr .9fr .9fr 1fr;
  gap: 44px;
  padding-bottom: 54px;
}
.footer-brand .brand-name {
  color: #fff;
}
.footer-brand .brand-name small {
  color: rgba(255, 255, 255, .5);
}
.footer-brand p {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.85;
  max-width: 320px;
  color: rgba(255, 255, 255, .65);
}
.footer-title {
  color: #fff;
  font-weight: 600;
  margin: 0 0 18px;
  font-size: 16px;
}
.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.footer-links a {
  color: rgba(255, 255, 255, .65);
  font-size: 14px;
  transition: color var(--trans-fast);
}
.footer-links a:hover {
  color: #fff;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12);
  padding: 18px 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, .45);
  text-align: center;
  max-width: 1200px;
  margin: 0 auto;
}
.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  box-shadow: 0 12px 26px rgba(43, 108, 176, .27);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--trans-base), transform var(--trans-base), visibility var(--trans-base), background var(--trans-fast);
}
.to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.to-top:hover {
  background: var(--brand-dark);
}
.to-top svg {
  width: 20px;
  height: 20px;
}
@media (max-width: 1080px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
  .review-wrap {
    grid-template-columns: 300px 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 992px) {
  .nav-toggle {
    display: inline-flex;
  }
  .nav-links {
    position: fixed;
    top: 79px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 18px 20px 24px;
    box-shadow: 0 24px 32px rgba(16, 35, 58, .12);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--trans-base), transform var(--trans-base), visibility var(--trans-base);
  }
  .site-header.nav-open .nav-links {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-link {
    display: block;
    padding: 13px 14px;
    font-size: 16px;
  }
  .nav-actions .btn {
    padding: 9px 15px;
    font-size: 14px;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    padding-top: 58px;
    padding-bottom: 70px;
    gap: 38px;
  }
  .hero-visual {
    max-width: 620px;
  }
  .visual-media img {
    max-height: none;
  }
  .review-wrap {
    grid-template-columns: 1fr;
  }
  .score-card {
    position: static;
  }
  .review-grid {
    grid-template-columns: 1fr 1fr;
  }
  .news-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 768px) {
  .section {
    padding: 66px 0;
  }
  .section-head {
    margin-bottom: 28px;
  }
  .section-head h2 {
    font-size: 24px;
  }
  .req-grid {
    grid-template-columns: 1fr;
  }
  .req-note {
    align-items: flex-start;
  }
  .news-section {
    padding-top: 64px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px 24px;
  }
}
@media (max-width: 580px) {
  .brand-name {
    font-size: 17px;
  }
  .brand-logo {
    width: 36px;
    height: 36px;
    border-radius: 10px;
  }
  .brand-logo svg {
    width: 26px;
    height: 26px;
  }
  .nav-wrap {
    min-height: 66px;
    gap: 8px;
  }
  .nav-links {
    top: 67px;
  }
  .nav-actions .btn {
    display: none;
  }
  .hero {
    background-color: #f2f7fc;
    background-image: linear-gradient(0deg, rgba(247, 250, 252, .9), rgba(247, 250, 252, .9)), url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
  }
  .hero h1 {
    font-size: 31px;
  }
  .hero-sub {
    font-size: 15px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .feature-card {
    flex-basis: 86vw;
  }
  .review-grid {
    grid-template-columns: 1fr;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .news-topline {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }
  .cta-content h2 {
    font-size: 24px;
  }
  .cta-content .btn-lg {
    padding: 14px 20px;
  }
}

/* roulang page: article */
:root {
  --primary: #2B6CB0;
  --primary-dark: #225A95;
  --primary-light: #E7F0FA;
  --accent: #F77A3C;
  --accent-dark: #D96327;
  --success: #2E9E6B;
  --text: #16232E;
  --text-body: #35434F;
  --text-muted: #7A8996;
  --border: #DCE7F2;
  --bg: #F7FAFC;
  --panel: #FFFFFF;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(16, 35, 58, .04), 0 10px 24px rgba(16, 35, 58, .04);
  --shadow-md: 0 2px 4px rgba(16, 35, 58, .06), 0 18px 36px rgba(16, 35, 58, .08);
  --container: 1200px;
  --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text-body);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color .18s ease;
}

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

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

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul, ol {
  padding-left: 1.25rem;
}

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 24px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: box-shadow .18s ease, transform .18s ease, background-color .18s ease, border-color .18s ease;
}

.btn-accent {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 8px 18px rgba(247, 122, 60, .2);
}

.btn-accent:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
  transform: translateY(-1px);
}

.btn-outline {
  background: #fff;
  color: var(--primary);
  border-color: #C6D8EC;
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: #F8FBFE;
}

.btn:active {
  transform: translateY(0);
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, .06);
  transition-duration: .08s;
}

.btn:focus-visible,
.nav-link:focus-visible,
.brand:focus-visible,
.article-related-card:focus-visible,
.back-top:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

/* tag / badge */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}

.tag-light {
  background: #FFF1E8;
  color: var(--accent-dark);
}

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #FFFFFF;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 8px rgba(20, 40, 68, .04);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 24px;
}

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

.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}

.brand-name small {
  margin-top: 2px;
  font-size: 11px;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: .04em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  transition: background .18s ease, color .18s ease;
}

.nav-link:hover {
  color: var(--primary);
  background: #F3F8FE;
}

.nav-link.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-download {
  height: 42px;
  padding: 0 20px;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  color: var(--text);
  transition: background .18s ease;
}

.nav-toggle:hover {
  background: #F2F6FA;
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
}

/* article header */
.article-page {
  padding: 44px 0 64px;
}

.article-wrap {
  max-width: 920px;
  margin: 0 auto;
}

.article-paper {
  background: var(--panel);
  border: 1px solid rgba(220, 231, 242, .7);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: clamp(28px, 4vw, 56px);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.breadcrumb a {
  color: var(--text-muted);
}

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

.breadcrumb .sep {
  opacity: .5;
}

.article-category-tag {
  margin-bottom: 18px;
}

.article-title {
  font-size: clamp(28px, 4.4vw, 40px);
  line-height: 1.35;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
  word-break: break-word;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  margin-top: 20px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 14px;
}

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-cover {
  margin-top: 28px;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--primary-light);
}

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

/* content typography */
.article-content {
  margin-top: 34px;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--text-body);
  word-break: break-word;
}

.article-content p {
  margin: 0 0 1.35em;
}

.article-content h2,
.article-content h3 {
  color: var(--text);
  font-weight: 700;
  line-height: 1.45;
  margin: 1.8em 0 .7em;
}

.article-content h2 {
  font-size: 24px;
}

.article-content h3 {
  font-size: 20px;
}

.article-content h4 {
  font-size: 17px;
  color: var(--text);
  margin: 1.5em 0 .6em;
}

.article-content a {
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(43, 108, 176, .35);
}

.article-content a:hover {
  text-decoration-color: var(--primary);
}

.article-content ul,
.article-content ol {
  margin: 0 0 1.35em;
  padding-left: 1.4rem;
}

.article-content li {
  margin-bottom: .5em;
}

.article-content img {
  border-radius: 12px;
  margin: 1.5em 0;
  width: 100%;
  height: auto;
}

.article-content blockquote {
  margin: 1.8em 0;
  padding: 18px 22px;
  background: #F0F7FE;
  border-left: 4px solid var(--primary);
  border-radius: 0 10px 10px 0;
  color: var(--text-body);
}

.article-content blockquote p:last-child {
  margin-bottom: 0;
}

.article-content code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  background: #F1F4F8;
  color: #24425E;
  border-radius: 6px;
  padding: 2px 8px;
  font-size: .92em;
}

.article-content pre {
  background: #F1F4F8;
  border-radius: 12px;
  padding: 20px;
  overflow-x: auto;
  margin: 1.8em 0;
}

.article-content pre code {
  background: none;
  padding: 0;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.8em 0;
  font-size: 15px;
}

.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}

.article-content th {
  background: #F4F8FC;
  color: var(--text);
  font-weight: 600;
}

.article-content .caption,
.article-content figcaption {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin-top: -12px;
  margin-bottom: 1.5em;
}

.article-info-line {
  margin-top: 34px;
  padding: 16px 18px;
  border-radius: 12px;
  background: #F5F9FE;
  border: 1px solid #DFEBF5;
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 1.7;
}

.article-info-line svg {
  flex: 0 0 auto;
}

/* not found */
.not-found {
  text-align: center;
  padding: 70px 20px 80px;
}

.not-found-icon {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  background: var(--primary-light);
  color: var(--primary);
}

.not-found h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.not-found p {
  max-width: 480px;
  margin: 0 auto 28px;
  color: var(--text-muted);
}

/* related */
.section-related {
  padding: 56px 0 10px;
}

.section-title-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 26px;
}

.section-title-row h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
}

.section-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  white-space: nowrap;
}

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

.article-related-card {
  display: block;
  background: var(--panel);
  border: 1px solid rgba(220, 231, 242, .7);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  color: inherit;
}

.article-related-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #C9DDF0;
  color: inherit;
}

.article-related-card:active {
  transform: translateY(0);
}

.related-thumb {
  background: var(--primary-light);
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}

.article-related-card:hover .related-thumb img {
  transform: scale(1.03);
}

.related-body {
  padding: 18px 18px 20px;
}

.related-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 51px;
}

.related-body p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}

.related-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
}

.related-more {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
}

.related-empty {
  grid-column: 1 / -1;
  border: 1px dashed #C4D6E8;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .6);
  padding: 46px 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

/* article back cta */
.article-cta {
  margin-top: 60px;
  padding: 36px 30px;
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.article-cta h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.5;
}

.article-cta p {
  color: var(--text-muted);
  font-size: 15px;
  margin-top: 4px;
}

.article-cta .btn {
  flex-shrink: 0;
}

/* footer */
.site-footer {
  background: #13293D;
  color: #C8D6E1;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding: 56px 24px 42px;
}

.site-footer .brand-name {
  color: #fff;
}

.site-footer .brand-name small {
  color: #92A7B8;
}

.footer-brand p {
  margin-top: 18px;
  font-size: 14px;
  line-height: 1.9;
  color: #B6C6D4;
  max-width: 330px;
}

.footer-title {
  color: #FFFFFF;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  padding: 0;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: #B6C6D4;
  font-size: 14px;
  transition: color .18s ease;
}

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

.footer-bottom {
  padding: 20px 24px;
  border-top: 1px solid rgba(255, 255, 255, .08);
  text-align: center;
  font-size: 13px;
  color: #8EA3B5;
  line-height: 1.6;
}

/* back top */
.back-top {
  position: fixed;
  right: 26px;
  bottom: 32px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 80;
  opacity: 0;
  visibility: hidden;
  transition: opacity .18s ease, transform .18s ease, visibility .18s;
}

.back-top.show {
  opacity: 1;
  visibility: visible;
}

.back-top:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: var(--primary-dark);
}

.back-top svg {
  width: 20px;
  height: 20px;
}

/* responsive */
@media (max-width: 992px) {
  .nav-links {
    gap: 4px;
  }

  .nav-link {
    padding: 0 12px;
    font-size: 14px;
  }

  .nav-download {
    padding: 0 14px;
    font-size: 14px;
  }
}

@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: #FFFFFF;
    border-bottom: 1px solid var(--border);
    padding: 12px 16px 20px;
    gap: 4px;
    box-shadow: 0 16px 30px rgba(15, 30, 48, .08);
    margin-left: 0;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity .18s ease, transform .18s ease, visibility .18s;
    max-height: calc(100vh - 90px);
    overflow-y: auto;
  }

  .site-header.nav-open .nav-links {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-link {
    height: 48px;
    border-radius: 10px;
    padding: 0 16px;
  }

  .nav-actions .nav-download {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    padding-top: 44px;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  .article-page {
    padding: 24px 0 36px;
  }

  .article-paper {
    padding: 24px 18px;
  }

  .article-title {
    font-size: 27px;
  }

  .article-content {
    font-size: 16px;
    line-height: 1.85;
  }

  .article-meta {
    gap: 8px 14px;
    font-size: 13px;
  }

  .article-info-line {
    flex-direction: column;
    align-items: flex-start;
  }

  .section-title-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .section-title-row h2 {
    font-size: 24px;
  }

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

  .related-body h3 {
    min-height: 0;
  }

  .article-cta {
    flex-direction: column;
    align-items: flex-start;
    padding: 28px 22px;
  }
}

@media (max-width: 520px) {
  .container,
  .footer-grid {
    padding-left: 16px;
    padding-right: 16px;
  }

  .brand-name {
    font-size: 18px;
  }

  .brand-name small {
    font-size: 10px;
  }

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

  .article-page {
    padding-top: 16px;
  }

  .article-wrap {
    padding: 0;
  }

  .article-paper {
    border-radius: 14px;
    padding: 22px 16px;
  }

  .breadcrumb {
    font-size: 13px;
  }

  .back-top {
    right: 14px;
    bottom: 18px;
  }
}

/* roulang page: category1 */
:root{
  --blue:#2B6CB0;
  --blue-dark:#1D5B98;
  --blue-deep:#1F3B57;
  --blue-soft:rgba(43,108,176,.08);
  --blue-ghost:#EAF2F8;
  --accent:#F77A3C;
  --accent-dark:#E26622;
  --bg:#F7FAFC;
  --surface:#FFFFFF;
  --ink:#16232E;
  --text:#35434F;
  --muted:#7A8996;
  --border:#E2E9F0;
  --line-light:#F0F4F7;
  --green:#2E9E6B;
  --success-bg:#E8F6EF;
  --warn-bg:#FFF4E0;
  --radius-lg:18px;
  --radius-md:12px;
  --radius-sm:8px;
  --shadow-sm:0 1px 2px rgba(16,35,58,.04),0 10px 24px rgba(16,35,58,.04);
  --shadow-md:0 2px 4px rgba(16,35,58,.05),0 20px 40px rgba(16,35,58,.08);
  --transition:all .2s ease;
}

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

html{
  scroll-behavior:smooth;
  scroll-padding-top:88px;
}

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

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

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

ul,ol{
  list-style:none;
}

button,input,select,textarea{
  font:inherit;
  border:none;
}

a:focus-visible,
button:focus-visible,
.btn:focus-visible{
  outline:2px solid var(--blue);
  outline-offset:3px;
  border-radius:6px;
}

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

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 22px;
  border-radius:var(--radius-md);
  font-size:15px;
  font-weight:600;
  line-height:1.4;
  color:var(--ink);
  background:transparent;
  border:1px solid transparent;
  cursor:pointer;
  transition:var(--transition);
  white-space:nowrap;
}

.btn:hover{
  transform:translateY(-1px);
}

.btn:active{
  transform:none;
  box-shadow:inset 0 2px 6px rgba(0,0,0,.12);
}

.btn-accent{
  background:var(--accent);
  color:#fff;
  box-shadow:0 8px 20px rgba(247,122,60,.18);
}

.btn-accent:hover{
  background:var(--accent-dark);
  box-shadow:0 12px 26px rgba(247,122,60,.3);
}

.btn-primary{
  background:var(--blue);
  color:#fff;
  box-shadow:0 8px 20px rgba(43,108,176,.18);
}

.btn-primary:hover{
  background:var(--blue-dark);
  box-shadow:0 12px 26px rgba(43,108,176,.28);
}

.btn-outline{
  background:var(--surface);
  color:var(--blue);
  border-color:var(--border);
}

.btn-outline:hover{
  border-color:var(--blue);
  background:var(--blue-ghost);
}

.btn-ghost{
  background:rgba(255,255,255,.06);
  color:#fff;
  border:1px solid rgba(255,255,255,.58);
  backdrop-filter:blur(4px);
}

.btn-ghost:hover{
  background:rgba(255,255,255,.16);
  color:#fff;
  border-color:#fff;
}

.btn-lg{
  padding:14px 30px;
  font-size:16px;
  border-radius:14px;
}

/* Header */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);
  box-shadow:0 1px 12px rgba(24,43,73,.04);
}

.site-header::before{
  content:"";
  display:block;
  height:3px;
  background:linear-gradient(90deg,var(--blue),var(--accent));
}

.nav-wrap{
  display:flex;
  align-items:center;
  min-height:70px;
  gap:20px;
}

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

.brand-logo{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}

.brand-name{
  display:flex;
  flex-direction:column;
  font-size:20px;
  font-weight:700;
  line-height:1.25;
  color:var(--ink);
  letter-spacing:.01em;
}

.brand-name small{
  font-size:11px;
  font-weight:400;
  letter-spacing:.08em;
  color:var(--muted);
}

.nav-links{
  display:flex;
  align-items:center;
  gap:26px;
  margin-left:auto;
  position:relative;
}

.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 2px;
  color:var(--text);
  font-size:15px;
  font-weight:500;
  line-height:1.5;
  transition:var(--transition);
  white-space:nowrap;
}

.nav-link:hover{
  color:var(--blue);
}

.nav-link.active{
  color:var(--blue);
  font-weight:600;
}

.nav-link.active::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  border-radius:4px;
  background:var(--blue);
}

.nav-actions{
  display:flex;
  align-items:center;
  gap:12px;
}

.nav-download{
  padding:9px 18px;
  font-size:14px;
}

.nav-toggle{
  display:none;
  width:42px;
  height:42px;
  align-items:center;
  justify-content:center;
  border-radius:10px;
  background:var(--blue-ghost);
  color:var(--blue);
  cursor:pointer;
  transition:var(--transition);
}

.nav-toggle:hover{
  background:var(--blue-soft);
}

.nav-toggle svg{
  width:22px;
  height:22px;
}

/* Category Banner */
.cat-banner{
  position:relative;
  background-color:#34556e;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  padding:96px 0 84px;
  color:#fff;
  overflow:hidden;
}

.cat-banner::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(12,28,46,.88) 0%,rgba(19,43,68,.72) 55%,rgba(20,52,80,.46) 100%);
}

.cat-banner-inner{
  position:relative;
  z-index:2;
  max-width:920px;
}

.cat-breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:rgba(255,255,255,.72);
  margin-bottom:24px;
}

.cat-breadcrumb a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:rgba(255,255,255,.78);
  transition:var(--transition);
}

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

.cat-breadcrumb .sep{
  opacity:.55;
}

.banner-kicker{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 14px;
  border-radius:999px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.22);
  font-size:13px;
  color:#fff;
  margin-bottom:18px;
  letter-spacing:.04em;
  backdrop-filter:blur(6px);
}

.cat-banner h1{
  font-size:clamp(32px,4.6vw,50px);
  font-weight:700;
  line-height:1.25;
  color:#fff;
  margin-bottom:18px;
  max-width:720px;
}

.banner-desc{
  font-size:17px;
  line-height:1.9;
  color:rgba(255,255,255,.88);
  max-width:680px;
  margin-bottom:32px;
}

.banner-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  align-items:center;
}

.banner-actions .btn{
  min-height:48px;
  padding:12px 28px;
}

/* General section */
.section{
  padding:88px 0;
}

.section-soft{
  background:var(--bg);
}

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

.section-tint{
  background:#EEF4FA;
}

.section-head{
  max-width:800px;
  margin-bottom:48px;
}

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

.section-no{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  border-radius:12px;
  background:var(--blue-ghost);
  color:var(--blue);
  font-size:14px;
  font-weight:700;
  margin-bottom:14px;
}

.section-head h2{
  font-size:clamp(24px,3vw,34px);
  line-height:1.35;
  font-weight:700;
  color:var(--ink);
  margin-bottom:12px;
  letter-spacing:.01em;
}

.section-head > p{
  font-size:16px;
  line-height:1.85;
  color:var(--muted);
  max-width:720px;
}

/* Version cards */
.version-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}

.version-card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:var(--transition);
}

.version-card:hover{
  box-shadow:var(--shadow-md);
  transform:translateY(-3px);
}

.version-thumb{
  height:190px;
  background:#DCE7F0;
  overflow:hidden;
}

.version-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .35s ease;
}

.version-card:hover .version-thumb img{
  transform:scale(1.03);
}

.version-body{
  display:flex;
  flex-direction:column;
  flex:1;
  padding:26px 26px 28px;
}

.badge-group{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:14px;
}

.badge{
  display:inline-flex;
  align-items:center;
  padding:4px 12px;
  border-radius:999px;
  font-size:13px;
  font-weight:500;
  line-height:1.5;
}

.badge-blue{
  background:var(--blue-ghost);
  color:var(--blue);
}

.badge-warm{
  background:#FFF0E8;
  color:#D2622A;
}

.badge-green{
  background:var(--success-bg);
  color:var(--green);
}

.version-card h3{
  font-size:20px;
  font-weight:700;
  color:var(--ink);
  margin-bottom:10px;
}

.version-body > p{
  color:var(--muted);
  font-size:15px;
  line-height:1.75;
  margin-bottom:18px;
}

.meta-list{
  display:grid;
  gap:8px;
  border-top:1px dashed var(--border);
  padding-top:16px;
  margin-bottom:20px;
}

.meta-list li{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--text);
}

.meta-list li::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--blue);
  flex:none;
}

.version-card .btn{
  width:100%;
  margin-top:auto;
}

/* Steps */
.steps-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:28px;
  counter-reset:step;
}

.step-card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:30px 22px 28px;
  box-shadow:var(--shadow-sm);
  transition:var(--transition);
  counter-increment:step;
}

.step-card:hover{
  box-shadow:var(--shadow-md);
  transform:translateY(-3px);
}

.step-index{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:48px;
  height:48px;
  border-radius:14px;
  background:var(--blue);
  color:#fff;
  font-size:19px;
  font-weight:700;
  margin-bottom:18px;
  box-shadow:0 8px 18px rgba(43,108,176,.22);
}

.step-card h3{
  font-size:18px;
  font-weight:700;
  color:var(--ink);
  margin-bottom:10px;
}

.step-card p{
  font-size:15px;
  color:var(--muted);
  line-height:1.8;
}

/* Safety note cards */
.note-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}

.check-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:30px 28px;
  box-shadow:var(--shadow-sm);
  transition:var(--transition);
}

.check-card:hover{
  box-shadow:var(--shadow-md);
  transform:translateY(-3px);
}

.check-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:54px;
  height:54px;
  border-radius:16px;
  background:var(--blue-ghost);
  color:var(--blue);
  margin-bottom:20px;
}

.check-icon svg{
  width:26px;
  height:26px;
}

.check-card h3{
  font-size:18px;
  font-weight:700;
  color:var(--ink);
  margin-bottom:10px;
}

.check-card p{
  font-size:15px;
  color:var(--muted);
  line-height:1.8;
}

/* Requirements */
.compare-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:28px;
  align-items:stretch;
}

.compare-col{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:34px 34px 32px;
  box-shadow:var(--shadow-sm);
  transition:var(--transition);
}

.compare-col.featured{
  border-color:rgba(43,108,176,.42);
  background:linear-gradient(180deg,#FFFFFF,#F4F9FE);
}

.compare-col:hover{
  box-shadow:var(--shadow-md);
}

.comp-head{
  border-bottom:1px solid var(--line-light);
  padding-bottom:16px;
  margin-bottom:22px;
}

.comp-head h3{
  font-size:21px;
  font-weight:700;
  color:var(--ink);
}

.comp-head span{
  font-size:14px;
  color:var(--muted);
  display:block;
  margin-top:4px;
}

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

.config-list li{
  display:flex;
  gap:18px;
  align-items:flex-start;
  padding:10px 0;
  border-bottom:1px dashed var(--line-light);
  font-size:15px;
}

.config-list li:last-child{
  border-bottom:none;
}

.config-label{
  display:flex;
  align-items:center;
  gap:6px;
  flex:none;
  width:86px;
  color:var(--ink);
  font-weight:600;
}

.config-label svg{
  width:17px;
  height:17px;
  color:var(--blue);
}

.config-val{
  color:var(--text);
  line-height:1.7;
}

.requirements-tip{
  display:flex;
  align-items:flex-start;
  gap:12px;
  margin-top:24px;
  padding:18px 22px;
  background:var(--warn-bg);
  border-radius:var(--radius-md);
  color:#8A5B17;
  font-size:14px;
  line-height:1.8;
}

.requirements-tip svg{
  width:20px;
  height:20px;
  flex:none;
  margin-top:4px;
  color:#D98B1A;
}

/* FAQ */
.faq-list{
  max-width:860px;
  margin:0 auto;
}

.faq-item{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:16px;
  margin-bottom:14px;
  overflow:hidden;
  transition:var(--transition);
}

.faq-item:hover{
  box-shadow:var(--shadow-sm);
}

.faq-item.open{
  border-color:rgba(43,108,176,.35);
  box-shadow:var(--shadow-sm);
}

.faq-q{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  width:100%;
  padding:20px 22px;
  background:transparent;
  text-align:left;
  color:var(--ink);
  font-size:16px;
  font-weight:600;
  line-height:1.7;
  cursor:pointer;
  transition:var(--transition);
}

.faq-q:hover{
  color:var(--blue);
}

.faq-q:hover .faq-icon{
  background:var(--blue-ghost);
}

.faq-icon{
  width:32px;
  height:32px;
  border-radius:50%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:#F0F5FA;
  color:var(--blue);
  transition:var(--transition);
}

.faq-icon svg{
  width:18px;
  height:18px;
}

.faq-item.open .faq-icon{
  transform:rotate(45deg);
  background:var(--blue);
  color:#fff;
}

.faq-a{
  display:none;
}

.faq-item.open .faq-a{
  display:block;
}

.faq-a-inner{
  padding:0 22px 22px;
  border-top:1px solid var(--line-light);
  padding-top:16px;
  color:var(--text);
  font-size:15px;
  line-height:1.85;
}

/* Final CTA */
.cta-panel{
  position:relative;
  background-color:#27445E;
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;
  background-position:center;
  padding:92px 0;
  color:#fff;
}

.cta-panel::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(120deg,rgba(17,37,58,.9),rgba(32,62,90,.72));
}

.cta-inner{
  position:relative;
  z-index:2;
  text-align:center;
  max-width:800px;
}

.cta-inner .eyebrow{
  display:inline-block;
  padding:6px 16px;
  border:1px solid rgba(255,255,255,.28);
  border-radius:999px;
  font-size:14px;
  background:rgba(255,255,255,.08);
  margin-bottom:18px;
  color:#fff;
}

.cta-inner h2{
  font-size:clamp(26px,3.4vw,40px);
  line-height:1.3;
  font-weight:700;
  color:#fff;
  margin-bottom:14px;
}

.cta-inner p{
  font-size:16px;
  line-height:1.85;
  color:rgba(255,255,255,.84);
  margin-bottom:34px;
}

.cta-buttons{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:16px;
}

.cta-note{
  margin-top:22px;
  font-size:13px;
  color:rgba(255,255,255,.62);
}

/* Footer */
.site-footer{
  background:#1E3546;
  color:#D5DEE5;
}

.footer-grid{
  display:grid;
  grid-template-columns:1.5fr .9fr .9fr .9fr;
  gap:40px;
  padding:54px 0 34px;
}

.footer-brand p{
  font-size:15px;
  color:rgba(255,255,255,.62);
  line-height:1.85;
  margin-top:16px;
  max-width:300px;
}

.footer-title{
  font-size:15px;
  font-weight:600;
  color:#fff;
  margin-bottom:18px;
  letter-spacing:.03em;
}

.footer-links{
  display:grid;
  gap:10px;
}

.footer-links a{
  display:inline-flex;
  color:rgba(255,255,255,.68);
  font-size:14px;
  line-height:1.6;
  transition:var(--transition);
}

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

.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:22px 24px;
  text-align:center;
  font-size:13px;
  color:rgba(255,255,255,.48);
}

.site-footer .brand-name{
  color:#fff;
}

.site-footer .brand-name small{
  color:rgba(255,255,255,.5);
}

@media(max-width:1199px){
  .version-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .version-card:last-child{
    grid-column:1/-1;
  }
  .steps-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .note-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .note-grid .check-card:last-child{
    grid-column:1/-1;
  }
  .footer-grid{
    grid-template-columns:1.4fr 1fr 1fr;
  }
  .footer-col:last-child{
    grid-column:2;
  }
}

@media(max-width:991px){
  .section{
    padding:72px 0;
  }
  .nav-links{
    display:none;
    position:absolute;
    top:73px;
    left:0;
    right:0;
    flex-direction:column;
    align-items:stretch;
    background:var(--surface);
    border-bottom:1px solid var(--border);
    box-shadow:0 18px 30px rgba(16,35,58,.08);
    padding:10px 24px 14px;
    gap:2px;
  }
  .nav-links.open{
    display:flex;
  }
  .nav-links a{
    padding:13px 4px;
    border-bottom:1px solid var(--line-light);
    font-size:16px;
  }
  .nav-links a.active::after{
    display:none;
  }
  .nav-links a.active{
    background:var(--blue-ghost);
    color:var(--blue);
    padding-left:12px;
    border-radius:var(--radius-sm);
  }
  .nav-toggle{
    display:inline-flex;
  }
  .compare-grid{
    grid-template-columns:1fr;
  }
  .brand-name small{
    display:none;
  }
}

@media(max-width:767px){
  .cat-banner{
    padding:70px 0 60px;
  }
  .cat-banner h1{
    font-size:32px;
  }
  .banner-desc{
    font-size:16px;
  }
  .version-grid{
    grid-template-columns:1fr;
  }
  .version-card:last-child{
    grid-column:auto;
  }
  .version-thumb{
    height:180px;
  }
  .steps-grid{
    grid-template-columns:1fr;
  }
  .note-grid{
    grid-template-columns:1fr;
  }
  .note-grid .check-card:last-child{
    grid-column:auto;
  }
  .cta-buttons{
    flex-direction:column;
    width:100%;
  }
  .cta-buttons .btn{
    width:100%;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:28px;
    padding-top:42px;
  }
  .footer-col:last-child{
    grid-column:auto;
  }
}

@media(max-width:520px){
  .section{
    padding:58px 0;
  }
  .container{
    padding-left:18px;
    padding-right:18px;
  }
  .nav-actions .btn{
    padding-left:14px;
    padding-right:14px;
    font-size:14px;
  }
  .brand-name{
    font-size:18px;
  }
  .cat-banner h1{
    font-size:28px;
  }
  .banner-actions{
    flex-direction:column;
    align-items:stretch;
  }
  .banner-actions .btn{
    width:100%;
  }
  .compare-col{
    padding:26px 20px;
  }
  .config-list li{
    flex-direction:column;
    gap:4px;
  }
  .faq-q{
    padding:16px;
    font-size:15px;
  }
  .faq-a-inner{
    padding-left:16px;
    padding-right:16px;
  }
  .version-body{
    padding:20px 18px 22px;
  }
  .step-card{
    padding:24px 18px;
  }
  .cta-panel{
    padding:66px 0;
  }
  .footer-grid{
    gap:24px;
  }
}

/* roulang page: category2 */
:root {
      --brand: #2B6CB0;
      --brand-dark: #25568F;
      --brand-light: #EAF2FA;
      --accent: #F77A3C;
      --accent-dark: #E5662B;
      --success: #2E9E6B;
      --bg: #F7FAFC;
      --panel: #FFFFFF;
      --text-head: #16232E;
      --text-body: #35434F;
      --text-muted: #7A8996;
      --border: #E3EBF2;
      --radius-lg: 18px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --radius-pill: 999px;
      --shadow-sm: 0 1px 2px rgba(16, 35, 58, .04), 0 10px 24px rgba(16, 35, 58, .04);
      --shadow-md: 0 2px 4px rgba(16, 35, 58, .04), 0 20px 40px rgba(16, 35, 58, .08);
      --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --container: 1200px;
      --space-section: 88px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-family);
      background: var(--bg);
      color: var(--text-body);
      line-height: 1.75;
      font-size: 16px;
      position: relative;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--brand);
      text-decoration: none;
      transition: color .2s ease;
    }

    a:hover,
    a:focus-visible {
      color: var(--brand-dark);
    }

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

    ul,
    ol {
      list-style: none;
    }

    button {
      font-family: inherit;
      background: none;
      border: none;
      cursor: pointer;
    }

    .container {
      width: min(100% - 48px, var(--container));
      margin-inline: auto;
    }

    .section {
      padding: var(--space-section) 0;
    }

    .section-alt {
      background: var(--panel);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .bg-soft {
      background: #EDF4FA;
    }

    .section-header {
      max-width: 760px;
      margin-bottom: 42px;
    }

    .section-header.center {
      margin-inline: auto;
      text-align: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      font-weight: 600;
      color: var(--brand);
      background: rgba(43, 108, 176, .08);
      border-radius: var(--radius-pill);
      padding: 4px 14px;
      margin-bottom: 14px;
      letter-spacing: .02em;
    }

    .section-header h2 {
      font-size: clamp(26px, 3vw, 34px);
      line-height: 1.3;
      color: var(--text-head);
      font-weight: 700;
      letter-spacing: -0.01em;
    }

    .section-header p {
      margin-top: 14px;
      color: var(--text-muted);
      font-size: 16px;
      max-width: 680px;
    }

    .section-header.center p {
      margin-inline: auto;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 15px;
      line-height: 1.2;
      min-height: 44px;
      padding: 10px 22px;
      transition: background .2s ease, box-shadow .2s ease, transform .2s ease, border-color .2s ease;
      border: 1px solid transparent;
    }

    .btn:hover,
    .btn:focus-visible {
      color: #fff;
      transform: translateY(-1px);
    }

    .btn:active {
      transform: translateY(0);
      box-shadow: inset 0 2px 5px rgba(0, 0, 0, .08);
    }

    .btn:focus-visible,
    .nav-toggle:focus-visible,
    .faq-toggle:focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: 2px;
    }

    .btn-accent {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 8px 20px rgba(247, 122, 60, .18);
    }

    .btn-accent:hover {
      background: var(--accent-dark);
      color: #fff;
      box-shadow: 0 12px 26px rgba(247, 122, 60, .24);
    }

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

    .btn-primary:hover {
      background: var(--brand-dark);
      color: #fff;
    }

    .btn-ghost {
      background: rgba(255, 255, 255, .14);
      border-color: rgba(255, 255, 255, .35);
      color: #fff;
      backdrop-filter: blur(4px);
    }

    .btn-ghost:hover,
    .btn-ghost:focus-visible {
      background: rgba(255, 255, 255, .26);
      border-color: rgba(255, 255, 255, .68);
      color: #fff;
    }

    .btn-outline {
      background: var(--panel);
      color: var(--brand);
      border-color: rgba(43, 108, 176, .28);
    }

    .btn-outline:hover,
    .btn-outline:focus-visible {
      border-color: var(--brand);
      color: var(--brand-dark);
      transform: translateY(-1px);
    }

    .btn-lg {
      min-height: 52px;
      padding: 14px 28px;
      font-size: 16px;
      border-radius: var(--radius-md);
    }

    .tag {
      display: inline-flex;
      align-items: center;
      border-radius: var(--radius-pill);
      background: var(--brand-light);
      color: var(--brand-dark);
      padding: 3px 12px;
      font-size: 13px;
      font-weight: 600;
      line-height: 1.5;
    }

    .header-top-bar {
      height: 3px;
      background: var(--brand);
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 80;
      background: rgba(255, 255, 255, .95);
      box-shadow: 0 1px 12px rgba(16, 35, 58, .06);
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      min-height: 72px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--text-head);
      flex-shrink: 0;
    }

    .brand:hover {
      color: var(--text-head);
    }

    .brand-logo {
      display: inline-flex;
      line-height: 0;
    }

    .brand-name {
      display: flex;
      flex-direction: column;
      font-size: 20px;
      font-weight: 700;
      letter-spacing: -0.01em;
      color: var(--text-head);
      line-height: 1.2;
    }

    .brand-name small {
      font-size: 11px;
      font-weight: 500;
      color: var(--text-muted);
      letter-spacing: .04em;
      line-height: 1.2;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-link {
      position: relative;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-body);
      padding: 6px 0;
    }

    .nav-link::after {
      content: "";
      position: absolute;
      left: 0;
      right: 100%;
      bottom: -2px;
      height: 2px;
      background: var(--brand);
      border-radius: var(--radius-pill);
      transition: right .25s ease;
    }

    .nav-link:hover {
      color: var(--brand);
    }

    .nav-link:hover::after,
    .nav-link.active::after {
      right: 0;
    }

    .nav-link.active {
      color: var(--brand);
      font-weight: 600;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .nav-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border-radius: var(--radius-sm);
      align-items: center;
      justify-content: center;
      color: var(--text-head);
      background: var(--bg);
    }

    .nav-toggle svg {
      width: 22px;
      height: 22px;
    }

    .nav-toggle.open svg {
      transform: rotate(90deg);
      transition: transform .2s;
    }

    .site-footer {
      background: #1D344B;
      color: rgba(255, 255, 255, .82);
      padding-top: 68px;
      font-size: 15px;
    }

    .site-footer a {
      color: rgba(255, 255, 255, .8);
    }

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

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 48px;
    }

    .footer-brand .brand-name {
      color: #fff;
    }

    .footer-brand .brand-name small {
      color: rgba(255, 255, 255, .66);
    }

    .footer-brand p {
      margin-top: 16px;
      max-width: 330px;
      font-size: 14px;
      line-height: 1.8;
      color: rgba(255, 255, 255, .68);
    }

    .footer-title {
      font-size: 16px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 16px;
      letter-spacing: .02em;
    }

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

    .footer-links a {
      font-size: 14px;
      opacity: .82;
    }

    .footer-links a:hover {
      opacity: 1;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, .12);
      text-align: center;
      padding: 20px 16px;
      font-size: 13px;
      color: rgba(255, 255, 255, .62);
    }

    .news-banner {
      position: relative;
      background-color: #244E7A;
      background-image: linear-gradient(180deg, rgba(19, 43, 68, .78), rgba(28, 61, 99, .58)), url('/assets/images/backpic/back-2.webp');
      background-repeat: no-repeat;
      background-position: center;
      background-size: cover;
      padding: 92px 0 84px;
      color: #fff;
    }

    .crumb {
      margin-bottom: 20px;
      font-size: 14px;
    }

    .crumb ol {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
    }

    .crumb a {
      color: rgba(255, 255, 255, .72);
      opacity: .9;
    }

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

    .crumb li + li::before {
      content: "·";
      margin-right: 8px;
      color: rgba(255, 255, 255, .55);
    }

    .banner-tag {
      display: inline-flex;
      border: 1px solid rgba(255, 255, 255, .44);
      background: rgba(255, 255, 255, .16);
      color: #fff;
      border-radius: var(--radius-pill);
      padding: 5px 15px;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 18px;
      backdrop-filter: blur(4px);
    }

    .news-banner h1 {
      font-size: clamp(32px, 5vw, 48px);
      line-height: 1.22;
      font-weight: 700;
      max-width: 860px;
      letter-spacing: -0.01em;
      color: #fff;
    }

    .news-banner .banner-lead {
      font-size: 18px;
      line-height: 1.8;
      color: rgba(255, 255, 255, .86);
      max-width: 700px;
      margin-top: 18px;
    }

    .banner-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-top: 34px;
    }

    .banner-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      margin-top: 40px;
      font-size: 14px;
      color: rgba(255, 255, 255, .72);
    }

    .banner-meta span {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .banner-meta svg {
      width: 16px;
      height: 16px;
    }

    .features {
      position: relative;
      margin-top: -36px;
      z-index: 4;
      padding-bottom: 0;
    }

    .feature-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }

    .feature-item {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .feature-item + .feature-item {
      border-left: 1px solid var(--border);
      padding-left: 24px;
    }

    .feature-icon {
      width: 42px;
      height: 42px;
      border-radius: var(--radius-md);
      background: var(--brand-light);
      color: var(--brand);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 6px;
    }

    .feature-icon svg {
      width: 21px;
      height: 21px;
    }

    .feature-item h3 {
      color: var(--text-head);
      font-size: 17px;
      font-weight: 600;
    }

    .feature-item p {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }

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

    .topic-card {
      display: flex;
      flex-direction: column;
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform .2s ease, box-shadow .2s ease;
    }

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

    .topic-cover {
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #dfeaf3;
    }

    .topic-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .3s ease;
    }

    .topic-card:hover .topic-cover img {
      transform: scale(1.03);
    }

    .topic-body {
      flex: 1;
      padding: 22px 22px 20px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .topic-body .tag {
      align-self: flex-start;
    }

    .topic-body h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-head);
      line-height: 1.45;
    }

    .topic-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.75;
      flex: 1;
    }

    .topic-meta {
      display: flex;
      justify-content: space-between;
      gap: 10px;
      flex-wrap: wrap;
      font-size: 13px;
      color: var(--text-muted);
      border-top: 1px solid var(--border);
      padding-top: 14px;
      margin-top: 4px;
    }

    .scene-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .scene-card {
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: box-shadow .2s ease, transform .2s ease;
    }

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

    .scene-num {
      font-size: 13px;
      font-weight: 700;
      color: var(--accent);
      letter-spacing: .06em;
      background: rgba(247, 122, 60, .1);
      border-radius: var(--radius-pill);
      padding: 2px 12px;
      display: inline-flex;
      margin-bottom: 16px;
    }

    .scene-card h3 {
      color: var(--text-head);
      margin-bottom: 8px;
    }

    .scene-card p {
      font-size: 14px;
      color: var(--text-muted);
    }

    .guide-wrap {
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 36px;
      align-items: center;
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

    .guide-copy h2 {
      font-size: clamp(24px, 3vw, 32px);
      line-height: 1.35;
      color: var(--text-head);
      margin-bottom: 12px;
    }

    .guide-copy p {
      color: var(--text-muted);
      max-width: 540px;
    }

    .guide-steps {
      display: flex;
      flex-direction: column;
      counter-reset: step;
      margin-top: 24px;
    }

    .guide-step {
      display: flex;
      gap: 16px;
      padding: 12px 0;
      border-bottom: 1px solid var(--border);
    }

    .guide-step:last-child {
      border-bottom: none;
    }

    .guide-step-index {
      counter-increment: step;
      flex-shrink: 0;
      width: 34px;
      height: 34px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-pill);
      background: var(--brand-light);
      color: var(--brand);
      font-weight: 700;
      font-size: 15px;
    }

    .guide-step-index::before {
      content: counter(step);
    }

    .guide-step h3 {
      color: var(--text-head);
      font-size: 16px;
      font-weight: 600;
    }

    .guide-step p {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .guide-panel {
      background: #233B54;
      color: #fff;
      border-radius: var(--radius-lg);
      padding: 30px;
      overflow: hidden;
      position: relative;
      min-height: 240px;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      background-image: linear-gradient(165deg, rgba(29, 55, 86, .44), rgba(16, 35, 55, .78)), url('/assets/images/coverpic/cover-6.png');
      background-position: center;
      background-size: cover;
      background-repeat: no-repeat;
    }

    .guide-panel h3 {
      color: #fff;
      font-size: 22px;
      line-height: 1.45;
      margin-bottom: 8px;
      max-width: 420px;
    }

    .guide-panel p {
      color: rgba(255, 255, 255, .78);
      font-size: 14px;
      margin-bottom: 18px;
      max-width: 400px;
    }

    .guide-panel .btn-outline {
      align-self: flex-start;
      background: transparent;
      border-color: rgba(255, 255, 255, .52);
      color: #fff;
    }

    .guide-panel .btn-outline:hover {
      background: rgba(255, 255, 255, .16);
      border-color: #fff;
    }

    .faq {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: box-shadow .2s ease;
    }

    .faq-item:hover {
      box-shadow: var(--shadow-sm);
    }

    .faq-toggle {
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 20px;
      text-align: left;
      padding: 18px 22px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-head);
      line-height: 1.5;
    }

    .faq-toggle .faq-icon {
      flex-shrink: 0;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--brand-light);
      color: var(--brand);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background .2s ease, color .2s ease, transform .2s ease;
    }

    .faq-toggle .faq-icon svg {
      width: 16px;
      height: 16px;
    }

    .faq-item[data-open="true"] .faq-toggle .faq-icon {
      transform: rotate(45deg);
      background: var(--brand);
      color: #fff;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height .25s ease;
    }

    .faq-answer-inner {
      padding: 0 22px 22px;
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.85;
      border-top: 1px solid transparent;
    }

    .faq-item[data-open="true"] .faq-answer {
      max-height: 420px;
    }

    .faq-item[data-open="true"] .faq-answer-inner {
      border-top-color: var(--border);
      padding-top: 16px;
    }

    .cta-panel {
      background-color: #1f3d5c;
      background-image: linear-gradient(rgba(23, 49, 78, .84), rgba(27, 54, 91, .8)), url('/assets/images/backpic/back-3.webp');
      background-position: center;
      background-size: cover;
      border-radius: var(--radius-lg);
      padding: 64px 50px;
      color: #fff;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .cta-panel h2 {
      max-width: 720px;
      margin: 0 auto 18px;
      color: #fff;
      font-size: clamp(26px, 4vw, 38px);
      line-height: 1.35;
      font-weight: 700;
    }

    .cta-panel p {
      max-width: 680px;
      margin: 0 auto 28px;
      color: rgba(255, 255, 255, .82);
      font-size: 16px;
      line-height: 1.8;
    }

    .cta-btns {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    .cta-note {
      margin-top: 20px;
      font-size: 13px;
      color: rgba(255, 255, 255, .7);
    }

    .back-top {
      position: fixed;
      right: 24px;
      bottom: 24px;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: rgba(43, 108, 176, .15);
      color: var(--brand);
      border: 1px solid rgba(43, 108, 176, .22);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-sm);
      opacity: .9;
      transition: opacity .2s;
      z-index: 10;
    }

    .back-top:hover {
      opacity: 1;
      transform: translateY(-2px);
    }

    .back-top svg {
      width: 18px;
      height: 18px;
    }

    @media (max-width: 1080px) {
      .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 24px;
      }

      .feature-item + .feature-item {
        border-left: none;
        padding-left: 14px;
      }

      .topic-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .scene-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .guide-wrap {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 920px) {
      .nav-links {
        position: fixed;
        top: 0;
        right: -320px;
        width: 320px;
        height: 100vh;
        background: #fff;
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
        padding: 90px 28px 30px;
        box-shadow: -16px 0 40px rgba(16, 35, 58, .08);
        border-left: 1px solid var(--border);
        transition: right .25s ease;
        z-index: 90;
      }

      .nav-links.open {
        right: 0;
      }

      .nav-link {
        width: 100%;
        padding: 12px 0;
        border-bottom: 1px solid var(--border);
        font-size: 16px;
      }

      .nav-link::after {
        display: none;
      }

      .nav-toggle {
        display: inline-flex;
      }

      .nav-download {
        display: inline-flex;
        min-height: 40px;
        padding: 8px 16px;
        font-size: 14px;
      }

      .cta-panel {
        padding: 52px 24px;
      }
    }

    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }

      .news-banner {
        padding: 70px 0 64px;
      }

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

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

      .guide-wrap {
        padding: 24px;
      }
    }

    @media (max-width: 560px) {
      :root {
        --space-section: 56px;
      }

      .container {
        width: min(100% - 32px, var(--container));
      }

      .nav-wrap {
        min-height: 64px;
      }

      .brand-name {
        font-size: 18px;
      }

      .brand-logo svg {
        width: 26px;
        height: 26px;
      }

      .nav-download {
        padding: 8px 12px;
        font-size: 13px;
      }

      .feature-grid {
        grid-template-columns: 1fr;
        padding: 22px;
      }

      .feature-item + .feature-item {
        padding-left: 0;
        border-top: 1px solid var(--border);
        padding-top: 18px;
      }

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

      .scene-card {
        padding: 20px;
      }

      .guide-panel {
        padding: 24px;
      }

      .banner-actions {
        flex-direction: column;
      }

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

      .btn-lg {
        width: 100%;
      }

      .faq-answer-inner {
        font-size: 14px;
      }

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

      .cta-panel {
        padding: 36px 20px;
        border-radius: var(--radius-md);
      }

      .cta-btns {
        flex-direction: column;
      }

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

      .back-top {
        right: 16px;
        bottom: 16px;
      }
    }

/* roulang page: category3 */
:root{
  --blue:#2B6CB0;
  --blue-dark:#1F4E7A;
  --blue-soft:#EAF1FA;
  --accent:#F77A3C;
  --accent-dark:#D95D1E;
  --bg:#F7FAFC;
  --panel:#ffffff;
  --ink:#16232E;
  --body:#35434F;
  --muted:#7A8996;
  --line:#E2E8F0;
  --line-soft:#EDF2F7;
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:10px;
  --shadow-sm:0 1px 2px rgba(16,35,58,.04),0 10px 24px rgba(16,35,58,.04);
  --shadow-md:0 2px 4px rgba(16,35,58,.05),0 20px 40px rgba(16,35,58,.07);
  --shadow-lg:0 4px 10px rgba(16,35,58,.08),0 30px 60px rgba(16,35,58,.10);
  --container:1200px;
  --radius-pill:999px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg);color:var(--body);line-height:1.8;font-size:16px}
body.nav-locked{overflow:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input,select{font-family:inherit;font-size:inherit}
button{border:none;background:none;cursor:pointer}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ===== 顶部导航 ===== */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line-soft);box-shadow:0 6px 18px rgba(16,35,58,.03)}
.site-header::before{content:"";position:absolute;left:0;top:0;width:100%;height:3px;background:linear-gradient(90deg,var(--blue),var(--blue) 60%,var(--accent))}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:76px}
.brand{display:inline-flex;align-items:center;gap:12px;flex-shrink:0;transition:opacity .2s}
.brand:hover{opacity:.9}
.brand-logo{width:42px;height:42px;border-radius:14px;background:rgba(43,108,176,.12);display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}
.brand-logo svg{display:block}
.brand-name{font-size:22px;font-weight:800;color:var(--ink);line-height:1.1;letter-spacing:.5px;display:flex;flex-direction:column}
.brand-name small{font-size:11px;font-weight:500;color:var(--muted);letter-spacing:1.4px}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-link{position:relative;font-size:15.5px;font-weight:500;color:#40505C;padding:10px 4px;margin:0 9px;transition:color .2s}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:2px;border-radius:2px;background:var(--blue);transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.nav-link:hover,.nav-link.active{color:var(--blue)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:14px}
.nav-download{height:44px;padding:0 22px;font-size:14.5px;border-radius:var(--radius-pill)}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;align-items:center;justify-content:center;color:var(--ink);background:#fff;transition:all .2s}
.nav-toggle:hover{border-color:var(--blue);color:var(--blue)}
.nav-toggle svg{width:22px;height:22px}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;height:48px;padding:0 26px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;line-height:1.2;letter-spacing:.2px;transition:all .18s ease;text-align:center;white-space:nowrap}
.btn svg{width:18px;height:18px;margin-left:8px}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(247,122,60,.18)}
.btn-accent:hover{background:var(--accent-dark);transform:translateY(-1px);box-shadow:0 12px 28px rgba(247,122,60,.25)}
.btn-accent:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(160,70,18,.2)}
.btn-white{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.4)}
.btn-white:hover{background:rgba(255,255,255,.22);transform:translateY(-1px)}
.btn-white:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.2)}
.btn-outline{background:#fff;color:var(--blue);border:1px solid var(--blue)}
.btn-outline:hover{background:var(--blue-soft);border-color:var(--blue-dark);color:var(--blue-dark);transform:translateY(-1px)}
.btn-lg{height:56px;padding:0 32px;font-size:16px;border-radius:14px}

/* ===== 通用板块 ===== */
.section{padding:88px 0}
.section-sm{padding:64px 0}
.section-head{max-width:760px;margin-bottom:42px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:600;color:var(--blue);letter-spacing:2.2px;text-transform:uppercase;background:rgba(43,108,176,.08);padding:5px 14px 5px 10px;border-radius:var(--radius-pill)}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent)}
.section-head h2{font-size:clamp(26px,3vw,35px);font-weight:750;line-height:1.3;color:var(--ink);margin:16px 0 14px}
.section-head p{font-size:16.5px;color:var(--muted);line-height:1.8}

/* ===== 分类横幅 ===== */
.cat-hero{position:relative;background:linear-gradient(97deg,rgba(13,25,38,.82),rgba(18,38,57,.68)),url('/assets/images/backpic/back-1.webp') center/cover;color:#fff;padding:92px 0 88px}
.cat-hero-inner{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:10px;font-size:14px;color:rgba(255,255,255,.78);margin-bottom:18px}
.breadcrumb a{color:rgba(255,255,255,.92);transition:color .2s}
.breadcrumb a:hover{color:var(--accent)}
.cat-hero h1{font-size:clamp(32px,5vw,52px);font-weight:800;line-height:1.28;color:#fff;max-width:950px;letter-spacing:.5px}
.cat-hero .hero-lead{max-width:820px;font-size:17.5px;line-height:1.95;color:rgba(255,255,255,.88);margin-top:22px}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;margin-top:34px}

/* ===== 场景卡片 ===== */
.scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.scenario-card{background:#fff;border-radius:var(--radius-lg);padding:30px 26px;border:1px solid var(--line-soft);box-shadow:var(--shadow-sm);transition:all .2s ease;position:relative;overflow:hidden}
.scenario-card::after{content:"";position:absolute;left:26px;top:-28px;width:90px;height:90px;border-radius:50%;background:rgba(43,108,176,.05);transition:transform .3s}
.scenario-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);border-color:#CFE0F0}
.card-icon{width:52px;height:52px;border-radius:14px;background:var(--blue-soft);color:var(--blue);display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.card-icon svg{width:26px;height:26px}
.scenario-card h3{font-size:19px;font-weight:700;color:var(--ink);margin-bottom:12px}
.scenario-card p{font-size:15px;line-height:1.85;color:var(--muted)}

/* ===== 图文说明 / 功能清单 ===== */
.split-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center}
.split-media{background:var(--panel);border-radius:24px;overflow:hidden;box-shadow:var(--shadow-lg);border:1px solid var(--line-soft)}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.split-dock{display:flex;flex-wrap:wrap;gap:18px;padding:20px 24px;background:#fff;border-top:1px solid var(--line-soft)}
.split-dock span{font-size:14px;color:var(--muted)}
.split-dock strong{color:var(--body);font-weight:600}
.split-copy .section-head{margin-bottom:22px}
.split-copy h2{font-size:clamp(26px,3vw,35px);font-weight:750;line-height:1.35;color:var(--ink);margin:14px 0 16px}
.check-list li{position:relative;padding:10px 0 10px 42px;font-size:16px;line-height:1.75;border-bottom:1px dashed var(--line-soft)}
.check-list li:last-child{border-bottom:none}
.check-list li::before{content:"✓";position:absolute;left:0;top:12px;width:26px;height:26px;border-radius:50%;background:rgba(46,158,107,.12);color:#2E9E6B;font-size:14px;font-weight:700;display:flex;align-items:center;justify-content:center}

/* ===== 流程步骤 ===== */
.steps-bg{background:#fff;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:steps}
.step-card{background:var(--bg);border:1px solid var(--line-soft);border-radius:var(--radius-lg);padding:30px 24px 26px;position:relative;transition:all .2s ease}
.step-card:hover{background:#fff;box-shadow:var(--shadow-md);transform:translateY(-3px)}
.step-count{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:12px;background:var(--blue);color:#fff;font-weight:700;font-size:15px;margin-bottom:18px}
.step-card h3{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:10px}
.step-card p{font-size:14.5px;line-height:1.8;color:var(--muted)}
.step-tag{display:inline-block;background:rgba(247,122,60,.1);color:var(--accent-dark);font-size:12.5px;font-weight:600;padding:3px 14px;border-radius:var(--radius-pill);margin-top:14px}

/* ===== 新手提示 ===== */
.tip-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.tip-card{background:#fff;border-radius:var(--radius-lg);padding:30px 28px;border:1px solid var(--line-soft);box-shadow:var(--shadow-sm);position:relative;transition:all .2s}
.tip-card::before{content:"";position:absolute;left:24px;right:24px;top:0;height:4px;border-radius:4px 4px 0 0;background:linear-gradient(90deg,var(--blue),var(--accent));opacity:.9}
.tip-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
.tip-card strong{display:block;font-size:17px;font-weight:700;color:var(--ink);margin:8px 0 10px}
.tip-card p{font-size:15px;color:var(--muted);line-height:1.85}

/* ===== FAQ ===== */
.faq-wrap{max-width:940px}
.faq-item{background:#fff;border:1px solid var(--line-soft);border-radius:16px;margin-bottom:16px;box-shadow:var(--shadow-sm);overflow:hidden;transition:box-shadow .2s}
.faq-item[open]{box-shadow:var(--shadow-md)}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 26px;font-size:17.5px;font-weight:700;color:var(--ink);cursor:pointer;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:#FAFCFF}
.faq-icon{width:34px;height:34px;border-radius:50%;background:var(--blue-soft);flex-shrink:0;position:relative;transition:all .3s ease}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--blue);border-radius:3px;transform:translate(-50%,-50%)}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item[open] .faq-icon{background:var(--blue);transform:rotate(45deg)}
.faq-item[open] .faq-icon::before,.faq-item[open] .faq-icon::after{background:#fff}
.faq-answer{padding:0 26px 24px 72px;color:var(--body);font-size:15.5px;line-height:1.9;border-top:1px solid var(--line-soft)}
.faq-answer p{margin-top:16px}

/* ===== CTA ===== */
.cta-section{padding:30px 0 100px}
.cta-panel{position:relative;background:linear-gradient(105deg,rgba(16,30,45,.9),rgba(31,59,83,.72)),url('/assets/images/backpic/back-2.webp') center/cover;border-radius:28px;padding:74px 60px;overflow:hidden;color:#fff;text-align:left}
.cta-tag{font-size:13px;font-weight:600;letter-spacing:1.5px;color:var(--accent);text-transform:uppercase}
.cta-panel h2{font-size:clamp(27px,3.4vw,40px);font-weight:800;line-height:1.35;color:#fff;max-width:760px;margin:14px 0 18px}
.cta-panel p{font-size:16.5px;line-height:1.9;color:rgba(255,255,255,.86);max-width:760px}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;margin-top:32px}
.cta-links{margin-top:22px;display:flex;flex-wrap:wrap;gap:22px;font-size:14px;color:rgba(255,255,255,.78)}
.cta-links a{color:#fff;border-bottom:1px solid rgba(255,255,255,.4);transition:border-color .2s;line-height:1.6}
.cta-links a:hover{border-color:var(--accent);color:var(--accent)}

/* ===== 页脚 ===== */
.site-footer{background:#10202C;color:#B8C7D3;padding:76px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1.1fr 1fr 1.1fr;gap:48px;padding-bottom:52px}
.footer-brand .brand{display:inline-flex;color:#fff}
.footer-brand .brand-name small{color:rgba(255,255,255,.55)}
.footer-brand p{margin-top:22px;font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.68);max-width:390px}
.footer-title{font-size:16px;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:.5px}
.footer-links li{margin-bottom:12px}
.footer-links a{color:rgba(255,255,255,.76);font-size:14.5px;line-height:1.6;transition:color .2s,padding-left .2s}
.footer-links a:hover{color:#fff;padding-left:6px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;text-align:center;font-size:13.5px;color:rgba(255,255,255,.5)}
.footer-bottom a{color:rgba(255,255,255,.72)}

/* ===== 动画 / 滚动 ===== */
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* ===== 响应式 ===== */
@media (max-width:1100px){
  .nav-link{margin:0 5px;font-size:14.8px}
  .brand-name{font-size:20px}
}
@media (max-width:991px){
  .nav-toggle{display:inline-flex}
  .nav-links{position:fixed;top:0;right:0;bottom:0;width:min(330px,86%);background:#fff;box-shadow:-12px 0 40px rgba(16,35,58,.12);flex-direction:column;align-items:stretch;justify-content:flex-start;gap:6px;padding:82px 28px 30px;transform:translateX(105%);transition:transform .28s ease;z-index:120}
  .site-header.nav-expanded .nav-links{transform:translateX(0)}
  .nav-expanded .nav-links::after{content:"";position:fixed;inset:0;background:rgba(12,23,35,.55);z-index:-1}
  .nav-link{padding:15px 18px;border-radius:14px;font-size:16px;color:var(--ink)}
  .nav-link::after{display:none}
  .nav-link:hover,.nav-link.active{background:var(--blue-soft);color:var(--blue)}
  .nav-download{display:none}
  .section{padding:64px 0}
  .scenario-grid,.tip-grid{grid-template-columns:repeat(2,1fr)}
  .tip-card:last-child{grid-column:span 2}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .cat-hero{padding:70px 0 64px}
  .cat-hero .hero-lead{font-size:16px}
  .cat-hero h1{font-size:34px;line-height:1.35}
  .split-wrap{grid-template-columns:1fr;gap:34px}
  .split-media img{aspect-ratio:16/10}
  .section-head h2{font-size:28px}
  .scenario-grid,.tip-grid{grid-template-columns:1fr}
  .tip-card:last-child{grid-column:auto}
  .steps-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px 30px;padding-bottom:40px}
  .cta-panel{padding:48px 24px;border-radius:20px}
  .cta-panel p{font-size:15px}
  .cta-actions .btn{width:100%}
  .hero-actions .btn{width:100%}
  .hero-actions .btn-white{flex:1}
  .faq-item summary{padding:18px 18px}
  .faq-answer{padding:0 18px 20px 52px}
}
@media (max-width:520px){
  .brand-name{font-size:18px}
  .brand-name small{font-size:9.5px}
  .brand-logo{width:38px;height:38px}
  .nav-wrap{height:68px;gap:12px}
  .footer-grid{grid-template-columns:1fr}
  .section-head h2{font-size:25px}
  .scenario-card,.tip-card{padding:24px 20px}
  .split-dock span{font-size:13px}
  .split-dock strong{display:block}
  .faq-answer{padding:0 18px 18px 18px;font-size:15px}
}

/* roulang page: category4 */
:root {
    --brand: #2569B5;
    --brand-dark: #1C4F86;
    --brand-deep: #142E47;
    --brand-soft: #E9F2FA;
    --accent: #F77A3C;
    --accent-dark: #DE622A;
    --bg: #F7FAFC;
    --surface: #FFFFFF;
    --border: #DCE7F0;
    --text-head: #15232F;
    --text-body: #37434F;
    --text-muted: #778791;
    --success: #2E9E6B;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 8px;
    --shadow-sm: 0 1px 2px rgba(16, 35, 58, .04), 0 10px 24px rgba(16, 35, 58, .04);
    --shadow-hover: 0 2px 4px rgba(16, 35, 58, .05), 0 22px 44px rgba(16, 35, 58, .09);
    --header-h: 82px;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    font-size: 16px;
    line-height: 1.75;
    color: var(--text-body);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
  }

  h1, h2, h3, h4, p, ul, ol, figure {
    margin: 0;
    padding: 0;
  }

  ul,
  ol {
    list-style: none;
  }

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

  a {
    color: var(--brand);
    text-decoration: none;
    transition: color .2s ease;
  }

  button {
    font: inherit;
    border: 0;
    background: none;
    cursor: pointer;
  }

  a:focus-visible,
  button:focus-visible,
  summary:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 3px;
    border-radius: 4px;
  }

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

  .section {
    padding: 88px 0;
  }

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

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

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

  .section-head .eyebrow {
    display: inline-flex;
    align-items: center;
    padding: 5px 14px;
    background: var(--brand-soft);
    color: var(--brand);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .08em;
  }

  .section-head h2 {
    margin-top: 16px;
    font-size: clamp(27px, 3vw, 36px);
    line-height: 1.32;
    color: var(--text-head);
    font-weight: 700;
    letter-spacing: .01em;
  }

  .section-head .section-desc {
    margin-top: 14px;
    font-size: 17px;
    line-height: 1.85;
    color: var(--text-muted);
  }

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

  /* ===== Button System ===== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 46px;
    padding: 0 22px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font-size: 15px;
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;
    transition: background .2s ease, border-color .2s ease, color .2s ease, box-shadow .2s ease, transform .15s ease;
  }

  .btn-lg {
    height: 54px;
    padding: 0 30px;
    font-size: 17px;
  }

  .btn-accent {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 8px 22px rgba(247, 122, 60, .28);
  }

  .btn-accent:hover {
    background: var(--accent-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 12px 28px rgba(247, 122, 60, .3);
  }

  .btn-accent:active {
    transform: translateY(0);
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, .08);
  }

  .btn-outline-light {
    background: rgba(255, 255, 255, .16);
    border-color: rgba(255, 255, 255, .75);
    color: #fff;
  }

  .btn-outline-light:hover {
    background: rgba(255, 255, 255, .24);
    color: #fff;
    transform: translateY(-1px);
  }

  .btn-outline-light:active {
    transform: translateY(0);
    background: rgba(255, 255, 255, .14);
  }

  .btn-light {
    background: #fff;
    color: var(--brand);
    border-color: #fff;
    box-shadow: 0 6px 18px rgba(14, 42, 67, .08);
  }

  .btn-light:hover {
    color: var(--brand-dark);
    transform: translateY(-1px);
    box-shadow: 0 12px 28px rgba(14, 42, 67, .12);
  }

  .btn-light:active {
    transform: translateY(0);
    box-shadow: inset 0 2px 6px rgba(20, 46, 71, .08);
  }

  /* ===== Header ===== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, .97);
    border-top: 3px solid var(--brand);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 12px rgba(16, 35, 58, .02);
  }

  .site-header.is-scrolled {
    box-shadow: 0 6px 22px rgba(16, 35, 58, .06);
  }

  .nav-wrap {
    height: var(--header-h);
    display: flex;
    align-items: center;
    gap: 30px;
  }

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

  .brand-logo {
    display: flex;
  }

  .brand-name {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    font-size: 19px;
    font-weight: 700;
    color: var(--text-head);
    letter-spacing: .02em;
  }

  .brand-name small {
    margin-top: 2px;
    font-size: 12px;
    font-weight: 400;
    color: var(--text-muted);
    letter-spacing: .04em;
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    margin-left: auto;
  }

  .nav-link {
    position: relative;
    padding: 27px 2px;
    font-size: 16px;
    color: var(--text-body);
  }

  .nav-link:hover {
    color: var(--brand);
  }

  .nav-link.active {
    color: var(--brand);
    font-weight: 600;
  }

  .nav-link.active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 3px;
    background: var(--brand);
    border-radius: 0 0 3px 3px;
  }

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

  .nav-actions .nav-download {
    height: 40px;
    padding: 0 18px;
  }

  .nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    color: var(--text-head);
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--surface);
  }

  .nav-toggle:hover {
    background: var(--brand-soft);
  }

  /* ===== Category Banner ===== */
  .category-banner {
    background: linear-gradient(102deg, rgba(18, 38, 58, .88) 20%, rgba(31, 85, 139, .76) 76%), url('/assets/images/backpic/back-1.webp') center 30% / cover no-repeat;
    background-color: var(--brand-deep);
    color: #fff;
  }

  .banner-inner {
    min-height: 360px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: rgba(255, 255, 255, .72);
    margin-bottom: 20px;
  }

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

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

  .banner-inner h1 {
    max-width: 940px;
    margin: 14px 0 18px;
    font-size: clamp(30px, 4.4vw, 48px);
    line-height: 1.25;
    color: #fff;
    font-weight: 700;
  }

  .banner-lead {
    max-width: 780px;
    font-size: 18px;
    line-height: 1.85;
    color: rgba(255, 255, 255, .9);
    margin-bottom: 32px;
  }

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

  /* ===== Risk Section ===== */
  .risk-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .risk-card {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 30px 28px;
    box-shadow: var(--shadow-sm);
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  }

  .risk-card:hover {
    transform: translateY(-4px);
    border-color: #C7DCEE;
    box-shadow: var(--shadow-hover);
  }

  .risk-index {
    display: block;
    margin-bottom: 20px;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: .08em;
    color: var(--accent);
  }

  .risk-card h3 {
    font-size: 19px;
    color: var(--text-head);
    line-height: 1.4;
    margin-bottom: 10px;
  }

  .risk-card p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-muted);
  }

  /* ===== Protection Section ===== */
  .protection-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .service-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 30px 28px;
    box-shadow: var(--shadow-sm);
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  }

  .service-card:hover {
    border-color: #C2D9ED;
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
  }

  .service-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    margin-bottom: 20px;
    border-radius: 14px;
    background: var(--brand-soft);
    color: var(--brand);
  }

  .service-card h3 {
    font-size: 19px;
    color: var(--text-head);
    line-height: 1.45;
    margin-bottom: 8px;
  }

  .service-card p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-muted);
  }

  /* ===== Workflow Section ===== */
  .workflow-grid {
    display: grid;
    grid-template-columns: .95fr 1.05fr;
    gap: 56px;
    align-items: center;
  }

  .flow-visual {
    position: relative;
  }

  .flow-visual img {
    width: 100%;
    border-radius: 22px;
    box-shadow: var(--shadow-hover);
    background: var(--brand-soft);
  }

  .flow-note {
    display: flex;
    gap: 12px;
    margin-top: 18px;
    padding: 16px 18px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    align-items: flex-start;
  }

  .flow-note svg {
    flex-shrink: 0;
    color: var(--success);
    margin-top: 2px;
  }

  .flow-note p {
    font-size: 15px;
    line-height: 1.75;
    color: var(--text-body);
  }

  .flow-steps {
    display: grid;
    gap: 18px;
  }

  .step-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px 22px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
  }

  .step-item:hover {
    box-shadow: var(--shadow-hover);
    border-color: #C6DBED;
    transform: translateY(-2px);
  }

  .step-num {
    width: 38px;
    height: 38px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--brand);
    color: #fff;
    font-weight: 700;
    font-size: 16px;
  }

  .step-body h4 {
    font-size: 18px;
    line-height: 1.4;
    color: var(--text-head);
    margin-bottom: 4px;
  }

  .step-body p {
    font-size: 15px;
    line-height: 1.75;
    color: var(--text-muted);
  }

  /* ===== Scene Cards ===== */
  .scene-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .scene-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 30px 28px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
  }

  .scene-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: #C7DCEE;
  }

  .scene-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    margin-bottom: 18px;
    border-radius: 14px;
    background: var(--brand-soft);
    color: var(--brand);
    font-size: 18px;
    font-weight: 800;
  }

  .scene-card h3 {
    font-size: 18px;
    color: var(--text-head);
    margin-bottom: 8px;
  }

  .scene-card p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-muted);
  }

  /* ===== FAQ ===== */
  .faq-list {
    max-width: 860px;
    margin: 0 auto;
  }

  .faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 14px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: border-color .2s ease, box-shadow .2s ease;
  }

  .faq-item[open] {
    border-color: #C2D6E9;
    box-shadow: var(--shadow-hover);
  }

  .faq-item summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 22px 26px;
    font-size: 17px;
    font-weight: 700;
    line-height: 1.5;
    color: var(--text-head);
    user-select: none;
  }

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

  .faq-item summary::after {
    content: "+";
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--brand-soft);
    color: var(--brand);
    font-size: 20px;
    font-weight: 500;
    line-height: 1;
    transition: background .2s ease, transform .2s ease;
  }

  .faq-item[open] summary::after {
    content: "−";
    background: var(--brand);
    color: #fff;
  }

  .faq-answer {
    padding: 0 26px 24px;
    font-size: 16px;
    line-height: 1.85;
    color: var(--text-body);
  }

  .faq-answer p + p {
    margin-top: 10px;
  }

  /* ===== Final CTA ===== */
  .final-cta {
    position: relative;
    padding: 90px 0;
    background: linear-gradient(100deg, rgba(15, 34, 52, .92) 10%, rgba(28, 75, 122, .84) 70%), url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
    background-color: var(--brand-deep);
    color: #fff;
    text-align: center;
  }

  .final-cta-inner {
    max-width: 780px;
    margin: 0 auto;
  }

  .final-cta h2 {
    font-size: clamp(26px, 3.4vw, 38px);
    line-height: 1.35;
    color: #fff;
    font-weight: 700;
    margin-bottom: 16px;
  }

  .final-cta p {
    font-size: 17px;
    line-height: 1.85;
    color: rgba(255, 255, 255, .88);
    margin-bottom: 30px;
  }

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

  /* ===== Footer ===== */
  .site-footer {
    background: #0E2A43;
    color: rgba(255, 255, 255, .76);
    padding: 64px 0 0;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2.1fr repeat(3, 1fr);
    gap: 44px;
    padding-bottom: 44px;
  }

  .footer-brand .brand {
    margin-bottom: 2px;
  }

  .footer-brand .brand-name {
    color: #fff;
  }

  .footer-brand .brand-name small {
    color: rgba(255, 255, 255, .62);
  }

  .footer-brand p {
    max-width: 340px;
    margin-top: 14px;
    font-size: 15px;
    line-height: 1.85;
    color: rgba(255, 255, 255, .66);
  }

  .footer-title {
    margin: 4px 0 18px;
    font-size: 16px;
    color: #fff;
    font-weight: 600;
  }

  .footer-links li {
    margin-top: 10px;
  }

  .footer-links a {
    color: rgba(255, 255, 255, .72);
    font-size: 15px;
  }

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

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .12);
    padding: 20px;
    text-align: center;
    font-size: 14px;
    color: rgba(255, 255, 255, .54);
  }

  /* ===== Responsive ===== */
  @media (max-width: 1199px) {
    .protection-grid,
    .risk-grid,
    .scene-grid {
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
  }

  @media (max-width: 991px) {
    .section {
      padding: 68px 0;
    }

    .nav-wrap {
      height: 74px;
      gap: 18px;
    }

    .nav-links {
      position: absolute;
      top: 100%;
      left: 0;
      right: 0;
      display: none;
      flex-direction: column;
      align-items: stretch;
      gap: 0;
      margin-left: 0;
      background: var(--surface);
      border-bottom: 1px solid var(--border);
      box-shadow: 0 28px 60px rgba(16, 35, 58, .14);
      padding: 10px 24px 18px;
    }

    .site-header.nav-open .nav-links {
      display: flex;
    }

    .nav-link {
      padding: 13px 2px;
      border-bottom: 1px solid #EDF3F8;
    }

    .nav-link.active::after {
      bottom: 10px;
      width: 30px;
      right: auto;
    }

    .nav-toggle {
      display: inline-flex;
    }

    .risk-grid,
    .protection-grid,
    .scene-grid {
      grid-template-columns: repeat(2, 1fr);
    }

    .workflow-grid {
      grid-template-columns: 1fr;
      gap: 40px;
    }

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

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

  @media (max-width: 767px) {
    .section {
      padding: 56px 0;
    }

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

    .banner-inner {
      min-height: 320px;
      padding-top: 44px;
      padding-bottom: 48px;
    }

    .banner-inner h1 {
      font-size: 30px;
    }

    .banner-lead {
      font-size: 16px;
    }

    .btn-lg {
      height: 50px;
      padding: 0 22px;
      font-size: 16px;
    }

    .risk-grid,
    .protection-grid,
    .scene-grid {
      grid-template-columns: 1fr;
    }

    .faq-item summary {
      padding: 18px 18px;
      font-size: 16px;
    }

    .faq-answer {
      padding: 0 18px 18px;
      font-size: 15px;
    }

    .final-cta {
      padding: 64px 0;
    }

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

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 30px;
    }

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

  @media (max-width: 480px) {
    .brand-name {
      font-size: 17px;
    }

    .brand-name small {
      font-size: 11px;
    }

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

    .btn {
      height: 44px;
      padding: 0 16px;
      font-size: 14px;
    }

    .service-card,
    .risk-card,
    .scene-card {
      padding: 24px 20px;
    }
  }