/* roulang page: index */
:root {
  --brand-main: #4A7BA7;
  --brand-dark: #345E83;
  --brand-soft: rgba(74, 123, 167, 0.08);
  --accent: #F0B35B;
  --accent-soft: #FFF6E8;
  --edge-glow: #49C9C2;
  --bg-page: #F8FAFC;
  --bg-soft: #F0F4F8;
  --bg-dark: #23303D;
  --bg-dark-2: #2B3D4D;
  --text-heading: #23303D;
  --text-body: #3C4A5A;
  --text-muted: #8895A3;
  --border: #E3E9EF;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-badge: 999px;
  --radius-img: 10px;
  --shadow-card: 0 4px 16px rgba(35, 48, 61, 0.06);
  --shadow-card-hover: 0 8px 24px rgba(35, 48, 61, 0.10);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --section-gap: 88px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-body);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--brand-main);
  text-decoration: none;
}

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

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

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

p {
  margin-bottom: 0;
}

.container {
  max-width: 1200px;
}

.row {
  --bs-gutter-x: 24px;
  --bs-gutter-y: 24px;
}

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

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

.section-white {
  background-color: #FFFFFF;
}

.section-head {
  margin-bottom: 44px;
}

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

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--brand-soft);
  color: var(--brand-main);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 5px 16px;
  border-radius: var(--radius-badge);
}

.section-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-heading);
  margin: 18px 0 10px;
  line-height: 1.35;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 640px;
}

.btn {
  border-radius: var(--radius-btn);
  font-weight: 600;
  padding: 10px 24px;
  transition: background-color .3s, border-color .3s, color .3s, transform .3s, box-shadow .3s;
}

.btn:focus-visible {
  outline: 3px solid rgba(74, 123, 167, 0.3);
  outline-offset: 2px;
  box-shadow: none;
}

.btn-primary-custom {
  background-color: var(--brand-main);
  border: 1px solid var(--brand-main);
  color: #FFFFFF;
}

.btn-primary-custom:hover {
  background-color: var(--brand-dark);
  border-color: var(--brand-dark);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(74, 123, 167, 0.22);
}

.btn-outline-custom {
  background-color: #FFFFFF;
  border: 1px solid var(--brand-main);
  color: var(--brand-main);
}

.btn-outline-custom:hover {
  background-color: var(--brand-soft);
  border-color: var(--brand-main);
  color: var(--brand-main);
  transform: translateY(-2px);
}

/* Header / Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1020;
  background: #FFFFFF;
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 72px;
  gap: 16px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-self: center;
  line-height: 1;
  text-decoration: none;
}

.brand-logo .brand-name {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-heading);
  white-space: nowrap;
}

.brand-logo .brand-name strong {
  color: var(--brand-main);
  font-weight: 800;
}

.desktop-nav {
  display: flex;
}

.desktop-nav.nav-left {
  justify-content: flex-start;
}

.desktop-nav.nav-right {
  justify-content: flex-end;
}

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

.desktop-nav .nav-link-text {
  position: relative;
  display: inline-block;
  padding: 8px 0;
  color: var(--text-body);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  transition: color .3s;
}

.desktop-nav .nav-link-text::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--brand-main);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s;
}

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

.desktop-nav .nav-link-text.active {
  color: var(--brand-main);
}

.desktop-nav .nav-link-text.active::after {
  transform: scaleX(1);
}

.btn-nav {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text-heading);
  padding: 0;
}

.btn-nav:hover {
  border-color: var(--brand-main);
  color: var(--brand-main);
}

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

.mobile-nav-panel {
  width: min(320px, 100%);
  background: #FFFFFF;
  border-left: 1px solid var(--border);
}

.mobile-nav-panel .offcanvas-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
}

.mobile-nav-panel .offcanvas-title {
  font-weight: 700;
  color: var(--text-heading);
}

.mobile-nav-panel .offcanvas-title strong {
  color: var(--brand-main);
}

.mobile-nav-panel .btn-close {
  border-radius: 50%;
  padding: 8px;
}

.mobile-nav-links {
  padding: 8px 0;
}

.mobile-nav-links li + li {
  border-top: 1px solid #F2F5F8;
}

.mobile-nav-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  color: var(--text-heading);
  font-weight: 500;
  font-size: 1rem;
  text-decoration: none;
  transition: background-color .3s, color .3s;
}

.mobile-nav-links a::after {
  content: "\f105";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.mobile-nav-links a.active {
  color: var(--brand-main);
  background: var(--brand-soft);
}

/* Hero */
.hero-section {
  position: relative;
  padding: 88px 0 96px;
  background: linear-gradient(135deg, #F2F6FA 0%, #E9F0F6 60%, #FFFFFF 100%);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.hero-bg-layer {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.14;
}

.hero-grid-layer {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(74, 123, 167, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 123, 167, 0.06) 1px, transparent 1px);
  background-size: 56px 56px;
}

.hero-inner {
  position: relative;
  z-index: 2;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius-badge);
  padding: 6px 18px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--brand-main);
  margin-bottom: 22px;
  box-shadow: var(--shadow-card);
}

.live-dot {
  position: relative;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #43C59E;
  flex-shrink: 0;
}

.live-dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border: 2px solid rgba(67, 197, 158, 0.5);
  border-radius: 50%;
  animation: livePulse 1.8s ease-out infinite;
}

@keyframes livePulse {
  0% {
    transform: scale(0.6);
    opacity: 1;
  }
  80%,
  100% {
    transform: scale(1.6);
    opacity: 0;
  }
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.35;
  margin-bottom: 18px;
}

.hero-title span {
  color: var(--brand-main);
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.9;
  max-width: 540px;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 30px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
}

.hero-stats li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-body);
}

.hero-stats li i {
  color: var(--brand-main);
  font-size: 1rem;
}

.hero-visual {
  position: relative;
}

.hero-visual-frame {
  position: relative;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 12px;
  box-shadow: 0 24px 48px rgba(35, 48, 61, 0.10);
}

.hero-visual-frame img {
  width: 100%;
  border-radius: 12px;
}

.hero-float {
  position: absolute;
  right: -18px;
  bottom: 30px;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow-card-hover);
}

.float-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--edge-glow);
  flex-shrink: 0;
}

.hero-float strong {
  display: block;
  font-size: 0.95rem;
  color: var(--text-heading);
  line-height: 1.4;
}

.hero-float span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Catalog cards */
.catalog-card {
  position: relative;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 26px 24px 24px;
  height: 100%;
  overflow: hidden;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}

.catalog-card::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-main), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s;
}

.catalog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(74, 123, 167, 0.25);
}

.catalog-card:hover::after {
  transform: scaleX(1);
}

.catalog-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.catalog-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--brand-soft);
  color: var(--brand-main);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.catalog-index {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  background: var(--bg-soft);
}

.catalog-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 10px;
}

.catalog-card p {
  color: var(--text-body);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 18px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--brand-main);
  font-weight: 600;
  font-size: 0.9rem;
}

.card-link i {
  transition: transform .3s;
}

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

.card-link:hover i {
  transform: translateX(4px);
}

/* Latest / CMS cards */
.info-card {
  display: flex;
  flex-direction: column;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  height: 100%;
  transition: box-shadow .3s, transform .3s, border-color .3s;
}

.info-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
  border-color: rgba(74, 123, 167, 0.22);
}

.card-thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-soft);
}

.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s;
}

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

.card-body-info {
  padding: 22px 24px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.info-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.badge-soft {
  display: inline-block;
  background: var(--brand-soft);
  color: var(--brand-main);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-badge);
}

.badge-accent {
  background: var(--accent-soft);
  color: #A26C20;
}

.info-meta time {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.info-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.55;
  margin-bottom: 10px;
}

.info-title a {
  color: inherit;
  text-decoration: none;
  transition: color .3s;
}

.info-title a:hover {
  color: var(--brand-main);
}

.info-excerpt {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}

.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  color: var(--brand-main);
  font-weight: 600;
  font-size: 0.875rem;
}

.arrow-link i {
  transition: transform .3s;
}

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

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

.empty-state {
  background: #FFFFFF;
  border: 1px dashed var(--border);
  border-radius: var(--radius-card);
  padding: 56px 24px;
  text-align: center;
  color: var(--text-muted);
}

.empty-state i {
  font-size: 2.2rem;
  color: var(--brand-main);
  margin-bottom: 14px;
  display: inline-block;
}

.empty-state p {
  font-size: 1rem;
  color: var(--text-muted);
}

/* Featured */
.feature-block + .feature-block {
  margin-top: 56px;
}

.feature-image {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-card-hover);
}

.feature-image img {
  width: 100%;
  transition: transform .5s;
}

.feature-image:hover img {
  transform: scale(1.03);
}

.feature-content {
  padding: 8px;
}

.feature-tag {
  display: inline-block;
  background: var(--accent-soft);
  color: #A26C20;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 5px 16px;
  border-radius: var(--radius-badge);
  margin-bottom: 16px;
}

.feature-title {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.45;
  margin-bottom: 14px;
}

.feature-content p {
  color: var(--text-body);
  line-height: 1.9;
  margin-bottom: 22px;
}

/* Recommend */
.recommend-card {
  display: block;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  height: 100%;
  text-decoration: none;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}

.recommend-card:hover {
  text-decoration: none;
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(74, 123, 167, 0.2);
}

.recommend-card img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  transition: transform .5s;
}

.recommend-card:hover img {
  transform: scale(1.05);
}

.recommend-info {
  padding: 20px;
}

.recommend-info .badge-soft {
  margin-bottom: 10px;
}

.recommend-info h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-heading);
  margin: 10px 0 8px;
}

.recommend-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 12px;
}

.recommend-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--brand-main);
  font-weight: 600;
  font-size: 0.875rem;
}

.recommend-link i {
  transition: transform .3s;
}

.recommend-card:hover .recommend-link i {
  transform: translateX(4px);
}

/* Bookmark / Share CTA */
.cta-panel {
  position: relative;
  background: var(--bg-dark);
  border: 1px solid #34475B;
  color: #EFF4F9;
  border-radius: 20px;
  padding: 56px;
  overflow: hidden;
  text-align: center;
}

.cta-panel-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  opacity: 0.22;
}

.cta-glow {
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  pointer-events: none;
}

.cta-glow-1 {
  top: -90px;
  right: -40px;
  background: radial-gradient(circle, rgba(73, 201, 194, 0.4), transparent 70%);
}

.cta-glow-2 {
  bottom: -100px;
  left: -30px;
  background: radial-gradient(circle, rgba(240, 179, 91, 0.3), transparent 70%);
}

.cta-content {
  position: relative;
  z-index: 2;
}

.cta-eyebrow {
  display: inline-block;
  background: rgba(73, 201, 194, 0.18);
  color: var(--edge-glow);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 5px 16px;
  border-radius: var(--radius-badge);
  margin-bottom: 18px;
  letter-spacing: 0.03em;
}

.cta-panel h2 {
  color: #FFFFFF;
  font-size: 1.85rem;
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.4;
}

.cta-panel>p,
.cta-content p {
  color: #AEBECF;
  max-width: 620px;
  margin: 0 auto 28px;
  font-size: 1rem;
  line-height: 1.9;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.btn-light-custom {
  background: #FFFFFF;
  color: var(--bg-dark);
  border: 1px solid #FFFFFF;
  border-radius: var(--radius-btn);
  padding: 10px 24px;
  font-weight: 600;
  transition: background-color .3s, transform .3s, box-shadow .3s;
}

.btn-light-custom:hover {
  background: #F0F4F8;
  border-color: #F0F4F8;
  color: var(--bg-dark);
  transform: translateY(-2px);
}

.btn-glow-custom {
  background: transparent;
  color: #FFFFFF;
  border: 1px solid var(--edge-glow);
  border-radius: var(--radius-btn);
  padding: 10px 24px;
  font-weight: 600;
  transition: background-color .3s, transform .3s, box-shadow .3s;
}

.btn-glow-custom:hover {
  background: rgba(73, 201, 194, 0.15);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(73, 201, 194, 0.2);
}

.subscribe-form {
  display: flex;
  gap: 12px;
  max-width: 520px;
  margin: 0 auto;
}

.subscribe-form input {
  flex: 1;
  min-width: 0;
  height: 46px;
  padding: 0 16px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #FFFFFF;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: border-color .3s, background-color .3s, box-shadow .3s;
}

.subscribe-form input::placeholder {
  color: #8FA3B5;
}

.subscribe-form input:focus {
  outline: none;
  border-color: var(--edge-glow);
  background: rgba(255, 255, 255, 0.14);
  box-shadow: 0 0 0 3px rgba(73, 201, 194, 0.18);
}

.subscribe-form .btn {
  flex-shrink: 0;
  height: 46px;
  line-height: 1;
}

/* FAQ */
.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-accordion .accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: #FFFFFF;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(35, 48, 61, 0.02);
}

.faq-accordion .accordion-button {
  background: #FFFFFF;
  color: var(--text-heading);
  font-weight: 600;
  font-size: 1.02rem;
  padding: 20px 24px;
  box-shadow: none;
  font-family: var(--font-sans);
}

.faq-accordion .accordion-button:not(.collapsed) {
  background: var(--brand-soft);
  color: var(--brand-main);
}

.faq-accordion .accordion-button:focus {
  box-shadow: 0 0 0 3px rgba(74, 123, 167, 0.18);
}

.faq-accordion .accordion-button::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%234A7BA7'%3E%3Cpath d='M8 0a1 1 0 0 1 1 1v6h6a1 1 0 1 1 0 2H9v6a1 1 0 1 1-2 0V9H1a1 1 0 0 1 0-2h6V1a1 1 0 0 1 1-1z'/%3E%3C/svg%3E");
  transition: transform .35s;
}

.faq-accordion .accordion-button:not(.collapsed)::after {
  transform: rotate(135deg);
}

.faq-accordion .accordion-body {
  padding: 4px 24px 20px;
  color: var(--text-body);
  line-height: 1.9;
  font-size: 0.95rem;
}

/* Footer */
.site-footer {
  background: var(--bg-dark);
  color: #AEBECF;
  padding-top: 60px;
}

.footer-brand {
  color: #FFFFFF;
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.footer-brand strong {
  color: var(--accent);
}

.site-footer .footer-desc {
  color: #879AAB;
  font-size: 0.9rem;
  line-height: 1.8;
  max-width: 320px;
}

.footer-title {
  color: #FFFFFF;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 18px;
}

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

.footer-links a {
  color: #AEBECF;
  font-size: 0.9rem;
  text-decoration: none;
  transition: color .3s, padding-left .3s;
}

.footer-links a:hover {
  color: #FFFFFF;
  padding-left: 4px;
}

.footer-contact p {
  color: #879AAB;
  font-size: 0.9rem;
  line-height: 1.8;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: 48px;
  padding: 20px 0;
  text-align: center;
  color: #7E93A8;
  font-size: 0.85rem;
}

/* Toast */
.toast-container {
  z-index: 1080;
}

.site-toast {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-card-hover);
  color: var(--text-heading);
}

/* Responsive */
@media (max-width: 991.98px) {
  .hero-section {
    padding: 64px 0 72px;
  }

  .hero-title {
    font-size: 1.9rem;
  }

  .hero-float {
    right: 4px;
  }

  .feature-title {
    font-size: 1.3rem;
  }

  .cta-panel {
    padding: 40px 32px;
  }
}

@media (max-width: 767.98px) {
  :root {
    --section-gap: 52px;
  }

  .header-inner {
    height: 60px;
    grid-template-columns: 1fr auto 1fr;
  }

  .brand-logo .brand-name {
    font-size: 1.13rem;
  }

  .hero-section {
    padding: 48px 0 56px;
  }

  .hero-title {
    font-size: 1.7rem;
    line-height: 1.4;
  }

  .hero-desc {
    font-size: 0.95rem;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
    gap: 14px;
    flex-direction: column;
    align-items: center;
  }

  .hero-float {
    position: static;
    margin-top: 16px;
    justify-content: center;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .section-head {
    margin-bottom: 28px;
  }

  .feature-block + .feature-block {
    margin-top: 40px;
  }

  .feature-image {
    border-radius: 12px;
  }

  .cta-panel {
    padding: 32px 20px;
    border-radius: 16px;
  }

  .cta-panel h2 {
    font-size: 1.3rem;
  }

  .subscribe-form {
    flex-direction: column;
    gap: 10px;
  }

  .subscribe-form input {
    width: 100%;
  }

  .subscribe-form .btn {
    width: 100%;
  }

  .footer-bottom {
    padding: 16px 0;
  }
}

@media (max-width: 575.98px) {
  .hero-actions .btn {
    width: 100%;
  }

  .hero-stats {
    align-items: flex-start;
  }

  .section-desc {
    font-size: 0.9rem;
  }
}

/* roulang page: article */
:root {
  --primary: #4A7BA7;
  --primary-dark: #3A648C;
  --primary-light: rgba(74, 123, 167, 0.12);
  --accent: #C9A86A;
  --accent-light: rgba(201, 168, 106, 0.18);
  --bg-body: #F8FAFC;
  --bg-sections: #F0F4F8;
  --bg-white: #FFFFFF;
  --text-dark: #23303D;
  --text-body: #3C4A5A;
  --text-muted: #8895A3;
  --border: #E3E9EF;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-badge: 999px;
  --radius-img: 10px;
  --shadow-card: 0 4px 16px rgba(35, 48, 61, 0.06);
  --shadow-card-hover: 0 8px 24px rgba(35, 48, 61, 0.1);
  --font-main: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --gutter: 24px;
}

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

html, body {
  overflow-x: hidden;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-body);
  color: var(--text-body);
  line-height: 1.75;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

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

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

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

.container {
  max-width: 1200px;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* ---------- Header / Nav ---------- */
.site-header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1030;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 12px;
  position: relative;
}

.brand-logo {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.brand-logo .brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: 0.01em;
}

.brand-logo .brand-name strong {
  color: var(--primary);
  font-weight: 800;
}

.desktop-nav .nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.desktop-nav .nav-link-text {
  display: block;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-body);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.desktop-nav .nav-link-text:hover {
  color: var(--primary);
  border-color: rgba(74, 123, 167, 0.4);
}

.desktop-nav .nav-link-text.active {
  color: var(--primary);
  border-bottom: 2px solid var(--primary);
}

.btn-nav {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dark);
  font-size: 1rem;
  transition: border-color .2s ease, background .2s ease, color .2s ease;
}

.btn-nav:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}

.mobile-nav-panel {
  background-color: var(--bg-white);
  border-left: 1px solid var(--border);
}

.mobile-nav-panel .offcanvas-title {
  font-weight: 700;
  color: var(--text-dark);
}

.mobile-nav-panel .offcanvas-title strong {
  color: var(--primary);
}

.mobile-nav-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.mobile-nav-links li + li {
  border-top: 1px solid var(--border);
}

.mobile-nav-links a {
  display: block;
  padding: 14px 16px;
  font-size: 1rem;
  color: var(--text-body);
  border-radius: var(--radius-btn);
  transition: background .2s ease, color .2s ease;
}

.mobile-nav-links a:hover,
.mobile-nav-links a.active {
  background: var(--primary-light);
  color: var(--primary);
}

/* ---------- Article Breadcrumb ---------- */
.article-breadcrumb {
  background: var(--bg-sections);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

.article-breadcrumb .breadcrumb {
  margin: 0;
  font-size: 0.875rem;
}

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

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

.article-breadcrumb .breadcrumb-item.active {
  color: var(--text-dark);
}

.article-breadcrumb .breadcrumb-item + .breadcrumb-item::before {
  color: var(--border);
}

/* ---------- Article Header ---------- */
.article-header {
  background: var(--bg-white);
  padding: 56px 0 32px;
  border-bottom: 1px solid var(--border);
}

.article-header .container {
  max-width: 820px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 18px;
}

.badge-category {
  display: inline-flex;
  align-items: center;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: var(--radius-badge);
}

.article-date {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.article-header h1 {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.35;
  margin: 0 0 14px;
}

.article-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  margin: 0;
}

/* ---------- Article Body ---------- */
.article-body-section {
  background: var(--bg-white);
  padding: 40px 0 64px;
}

.article-body-section .container-narrow {
  max-width: 820px;
  margin: 0 auto;
}

.article-content {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-body);
  word-wrap: break-word;
}

.article-content p {
  margin: 0 0 1.5em;
}

.article-content h2 {
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: 2.2em 0 1em;
  padding-bottom: 0.5em;
  border-bottom: 1px solid var(--border);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-dark);
  margin: 2em 0 0.8em;
}

.article-content h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-dark);
  margin: 1.8em 0 0.6em;
}

.article-content blockquote {
  margin: 1.8em 0;
  padding: 18px 24px;
  background: var(--bg-sections);
  border-left: 4px solid var(--primary);
  border-radius: 4px 10px 10px 4px;
  color: var(--text-body);
  font-style: normal;
}

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

.article-content img {
  border-radius: var(--radius-img);
  display: block;
  margin: 2em auto;
}

.article-content figure {
  margin: 2em 0;
}

.article-content figcaption {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-top: 10px;
}

.article-content ul,
.article-content ol {
  margin: 0 0 1.5em 1.2em;
  padding-left: 0.5em;
}

.article-content li {
  margin-bottom: 0.4em;
}

.article-content a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- Not Found ---------- */
.not-found-card {
  text-align: center;
  padding: 72px 24px;
  max-width: 640px;
  margin: 0 auto;
  background: var(--bg-sections);
  border-radius: var(--radius-card);
}

.not-found-card i {
  font-size: 3rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 18px;
}

.not-found-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}

.not-found-card p {
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* ---------- Share CTA ---------- */
.share-cta {
  padding: 24px 0 8px;
  background: var(--bg-white);
}

.share-cta .share-card {
  background: var(--bg-sections);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.share-cta .share-text {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  color: var(--text-dark);
  font-weight: 600;
}

.share-cta .share-text i {
  color: var(--primary);
  font-size: 1.25rem;
}

.share-btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-btn);
  padding: 10px 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.5;
  transition: all .25s ease;
  border: 2px solid transparent;
}

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

.btn-primary:hover,
.btn-primary:focus {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(74, 123, 167, 0.25);
}

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

.btn-outline-primary:hover,
.btn-outline-primary:focus {
  background: var(--primary-light);
  color: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
}

.btn-sm-light {
  background: var(--bg-white);
  color: var(--text-body);
  border-color: var(--border);
  font-size: 0.875rem;
  padding: 8px 18px;
}

.btn-sm-light:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* ---------- Related Posts ---------- */
.related-section {
  background: var(--bg-body);
  padding: 64px 0;
}

.related-section .section-title {
  text-align: center;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 40px;
  position: relative;
  padding-bottom: 16px;
}

.related-section .section-title::after {
  content: "";
  display: block;
  width: 56px;
  height: 3px;
  background: var(--primary);
  border-radius: 3px;
  margin: 16px auto 0;
}

.related-card {
  background: var(--bg-white);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow .3s ease, transform .3s ease;
  height: 100%;
  display: block;
}

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

.related-card .related-thumb {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.related-card .related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}

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

.related-card .related-body {
  padding: 20px 22px 24px;
}

.related-card .related-body h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
  line-height: 1.4;
}

.related-card .related-body p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card .related-body .related-more {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s ease;
}

.related-card .related-body .related-more:hover {
  gap: 10px;
}

/* ---------- Back Link ---------- */
.back-section {
  background: var(--bg-body);
  padding: 0 0 64px;
  text-align: center;
}

/* ---------- FAQ ---------- */
.faq-section {
  background: var(--bg-white);
  padding: 64px 0;
}

.faq-section .section-title {
  text-align: center;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 36px;
  position: relative;
  padding-bottom: 16px;
}

.faq-section .section-title::after {
  content: "";
  display: block;
  width: 56px;
  height: 3px;
  background: var(--primary);
  border-radius: 3px;
  margin: 16px auto 0;
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

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

.faq-item:hover {
  border-color: rgba(74, 123, 167, 0.4);
  box-shadow: var(--shadow-card);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  cursor: pointer;
  background: var(--bg-white);
  border: none;
  width: 100%;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dark);
  text-align: left;
  transition: color .2s ease;
}

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

.faq-question .faq-icon {
  font-size: 0.85rem;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform .3s ease;
}

.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-body);
  font-size: 0.9375rem;
  line-height: 1.75;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #23303D;
  padding: 56px 0 0;
}

.site-footer .footer-brand {
  font-size: 1.375rem;
  font-weight: 700;
  color: #D6E0EA;
  margin-bottom: 12px;
}

.site-footer .footer-brand strong {
  color: #9FC2DE;
}

.footer-desc {
  color: #94A3B3;
  font-size: 0.9375rem;
  margin: 0;
  line-height: 1.7;
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  color: #D6E0EA;
  margin-bottom: 16px;
}

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

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

.footer-links a {
  color: #94A3B3;
  font-size: 0.9rem;
  transition: color .2s ease, padding-left .2s ease;
}

.footer-links a:hover {
  color: #C5D6E4;
  padding-left: 4px;
}

.footer-contact {
  color: #94A3B3;
  font-size: 0.875rem;
  line-height: 1.7;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-card);
  padding: 16px 18px;
}

.footer-contact p {
  margin: 0;
}

.footer-bottom {
  margin-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  text-align: center;
  color: #7B8A99;
  font-size: 0.8125rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 991.98px) {
  .article-header h1 {
    font-size: 1.875rem;
  }

  .article-body-section .container-narrow {
    padding-left: 24px;
    padding-right: 24px;
  }

  .share-cta .share-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-section .hero-inner {
    gap: 24px;
  }
}

@media (max-width: 767.98px) {
  .brand-logo {
    position: static;
    transform: none;
  }

  .header-inner {
    height: 64px;
  }

  .article-header {
    padding: 40px 0 24px;
  }

  .article-header h1 {
    font-size: 1.625rem;
  }

  .article-body-section {
    padding: 28px 0 48px;
  }

  .article-body-section .container-narrow {
    padding-left: 20px;
    padding-right: 20px;
  }

  .article-content h2 {
    font-size: 1.375rem;
  }

  .article-content h3 {
    font-size: 1.125rem;
  }

  .article-content blockquote {
    padding: 14px 18px;
  }

  .share-cta .share-card {
    padding: 22px 20px;
  }

  .related-section .section-title,
  .faq-section .section-title {
    font-size: 1.5rem;
  }

  .related-card .related-body {
    padding: 16px 18px 20px;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 0.9375rem;
  }

  .faq-answer {
    padding: 0 18px 16px;
  }

  .site-footer {
    padding-top: 44px;
  }
}

@media (max-width: 575.98px) {
  .article-breadcrumb {
    padding: 12px 0;
  }

  .article-meta {
    gap: 8px;
  }

  .btn {
    padding: 9px 18px;
    font-size: 0.875rem;
  }

  .share-btn-group .btn {
    flex: 1;
  }

  .back-section .btn {
    width: 100%;
  }

  .article-content {
    font-size: 0.9375rem;
  }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #4A7BA7;
            --primary-light: #5B8DB8;
            --primary-soft: rgba(74, 123, 167, 0.1);
            --accent: #D9B384;
            --accent-soft: rgba(217, 179, 132, 0.2);
            --bg-page: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-alt: #F0F4F8;
            --text-heading: #23303D;
            --text-body: #3C4A5A;
            --text-muted: #8895A3;
            --border-color: #E3E9EF;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --shadow-card: 0 4px 16px rgba(35, 48, 61, 0.06);
            --shadow-card-hover: 0 8px 24px rgba(35, 48, 61, 0.1);
            --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --space-section: 88px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-page);
            color: var(--text-body);
            line-height: 1.8;
            font-size: 1rem;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: var(--primary);
            transition: color 0.3s ease;
        }

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

        button {
            font-family: inherit;
        }

        /* ===== Bootstrap 覆盖 ===== */
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        .btn {
            font-family: var(--font-family);
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
            border: 2px solid var(--primary);
            padding: 0.625rem 1.75rem;
            box-shadow: none;
        }

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

        .btn-outline-custom {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
            padding: 0.625rem 1.75rem;
        }

        .btn-outline-custom:hover {
            background: var(--primary-soft);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: var(--accent);
            border: 2px solid var(--accent);
            color: #23303D;
            padding: 0.625rem 1.75rem;
        }

        .btn-accent:hover {
            background: transparent;
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }

        .badge-custom {
            display: inline-block;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.75rem;
            border-radius: var(--radius-badge);
            letter-spacing: 0.02em;
        }

        .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card) !important;
            margin-bottom: 1rem;
            overflow: hidden;
            background: var(--bg-white);
            box-shadow: var(--shadow-card);
        }

        .accordion-button {
            font-weight: 600;
            color: var(--text-heading);
            background: var(--bg-white);
            padding: 1.125rem 1.5rem;
            font-size: 1rem;
            border: none;
        }

        .accordion-button:not(.collapsed) {
            background: var(--bg-white);
            color: var(--primary);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(74, 123, 167, 0.15);
        }

        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%234A7BA7'%3E%3Cpath fill-rule='evenodd' d='M8 4a.5.5 0 0 1 .5.5v3h3a.5.5 0 0 1 0 1h-3v3a.5.5 0 0 1-1 0v-3h-3a.5.5 0 0 1 0-1h3v-3A.5.5 0 0 1 8 4z'/%3E%3C/svg%3E");
            transition: transform 0.3s ease;
        }

        .accordion-body {
            padding: 0 1.5rem 1.25rem;
            background: var(--bg-alt);
            border-radius: 0 0 var(--radius-card) var(--radius-card);
        }

        .accordion-body p {
            margin-bottom: 0;
        }

        /* ===== 区块标题 ===== */
        .section {
            padding: var(--space-section) 0;
        }

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

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

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 3rem;
        }

        .section-head .tagline {
            display: inline-block;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 0.8125rem;
            font-weight: 600;
            padding: 0.25rem 1rem;
            border-radius: var(--radius-badge);
            margin-bottom: 0.75rem;
            letter-spacing: 0.05em;
        }

        .section-head h2 {
            font-size: 1.875rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 0.875rem;
            line-height: 1.3;
        }

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

        /* ===== 头部导航 ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: 72px;
            display: flex;
            align-items: center;
            box-shadow: 0 2px 12px rgba(35, 48, 61, 0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            width: 100%;
        }

        .desktop-nav {
            flex: 0 0 auto;
        }

        .nav-links {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0;
            padding: 0;
        }

        .nav-link-text {
            display: inline-block;
            padding: 0.5rem 1rem;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-btn);
            transition: all 0.3s ease;
            position: relative;
        }

        .nav-link-text:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }

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

        .nav-link-text.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            text-decoration: none;
            flex-shrink: 0;
            padding: 0 8px;
        }

        .brand-logo .brand-name {
            font-size: 1.375rem;
            color: var(--text-heading);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .brand-logo .brand-name strong {
            color: var(--primary);
            font-weight: 800;
        }

        .btn-nav {
            background: transparent;
            border: none;
            font-size: 1.375rem;
            color: var(--text-heading);
            padding: 0.375rem 0.75rem;
            border-radius: var(--radius-btn);
            transition: all 0.3s ease;
            line-height: 1;
        }

        .btn-nav:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }

        .btn-nav:focus {
            box-shadow: 0 0 0 3px rgba(74, 123, 167, 0.15);
        }

        .mobile-nav-panel {
            background: var(--bg-white);
            width: 300px;
        }

        .mobile-nav-panel .offcanvas-header {
            border-bottom: 1px solid var(--border-color);
            padding: 1.25rem;
        }

        .mobile-nav-panel .offcanvas-title {
            font-size: 1.25rem;
            color: var(--text-heading);
        }

        .mobile-nav-panel .offcanvas-title strong {
            color: var(--primary);
        }

        .mobile-nav-panel .btn-close {
            font-size: 0.875rem;
        }

        .mobile-nav-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .mobile-nav-links li {
            border-bottom: 1px solid var(--border-color);
        }

        .mobile-nav-links li:last-child {
            border-bottom: none;
        }

        .mobile-nav-links a {
            display: block;
            padding: 0.9375rem 1.25rem;
            font-size: 1rem;
            color: var(--text-body);
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .mobile-nav-links a:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }

        .mobile-nav-links a.active {
            color: var(--primary);
            font-weight: 700;
            background: var(--primary-soft);
        }

        /* ===== 页面 Hero ===== */
        .page-hero {
            background: var(--bg-alt);
            padding: 72px 0 56px;
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(74, 123, 167, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -60px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(217, 179, 132, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }

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

        .page-hero h1 {
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 1rem;
            line-height: 1.3;
        }

        .page-hero h1 span {
            color: var(--primary);
        }

        .page-hero .lead {
            font-size: 1.0625rem;
            color: var(--text-body);
            max-width: 680px;
            line-height: 1.9;
            margin-bottom: 1.75rem;
        }

        .page-hero .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.875rem;
        }

        .page-hero .hero-bg {
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            width: 40%;
            opacity: 0.6;
            pointer-events: none;
        }

        /* ===== 品牌理念区 ===== */
        .brand-intro {
            background: var(--bg-white);
            padding: var(--space-section) 0;
        }

        .intro-card {
            display: flex;
            align-items: center;
            gap: 56px;
        }

        .intro-media {
            flex: 0 0 46%;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            aspect-ratio: 4/3;
        }

        .intro-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .intro-media:hover img {
            transform: scale(1.03);
        }

        .intro-content {
            flex: 1;
        }

        .intro-content .tagline {
            display: inline-block;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 0.8125rem;
            font-weight: 600;
            padding: 0.25rem 0.875rem;
            border-radius: var(--radius-badge);
            margin-bottom: 1rem;
        }

        .intro-content h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.4;
            margin-bottom: 1rem;
        }

        .intro-content p {
            color: var(--text-body);
            margin-bottom: 1rem;
            text-align: justify;
        }

        .intro-points {
            list-style: none;
            padding: 0;
            margin: 1.25rem 0 0;
        }

        .intro-points li {
            display: flex;
            align-items: flex-start;
            gap: 0.625rem;
            padding: 0.5rem 0;
            color: var(--text-body);
        }

        .intro-points li i {
            color: var(--primary);
            margin-top: 0.375rem;
        }

        /* ===== 动态聚焦卡片 ===== */
        .focus-section {
            background: var(--bg-alt);
            padding: var(--space-section) 0;
        }

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

        .focus-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all 0.4s ease;
            border: 1px solid transparent;
        }

        .focus-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-color);
        }

        .focus-card-media {
            position: relative;
            aspect-ratio: 4/3;
            overflow: hidden;
        }

        .focus-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .focus-card:hover .focus-card-media img {
            transform: scale(1.05);
        }

        .focus-card-media .badge-custom {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: none;
            box-shadow: 0 2px 8px rgba(35, 48, 61, 0.1);
        }

        .focus-card-body {
            padding: 1.5rem;
        }

        .focus-card-body h3 {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 0.625rem;
            line-height: 1.5;
        }

        .focus-card-body p {
            font-size: 0.9375rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 1rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .focus-card-more {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--primary);
            transition: gap 0.3s ease;
        }

        .focus-card-more:hover {
            gap: 0.625rem;
        }

        /* ===== 品牌发展时间线 ===== */
        .timeline-section {
            background: var(--bg-white);
            padding: var(--space-section) 0;
        }

        .timeline {
            position: relative;
            max-width: 860px;
            margin: 0 auto;
            padding: 2rem 0;
        }

        .timeline::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 24px;
            width: 2px;
            background: var(--border-color);
        }

        .timeline-item {
            position: relative;
            padding-left: 72px;
            padding-bottom: 2.5rem;
        }

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

        .timeline-dot {
            position: absolute;
            left: 12px;
            top: 6px;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--bg-white);
            border: 3px solid var(--primary);
            box-shadow: 0 0 0 4px var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .timeline-dot i {
            font-size: 0.625rem;
            color: var(--primary);
        }

        .timeline-content {
            background: var(--bg-alt);
            border-radius: var(--radius-card);
            padding: 1.5rem 1.75rem;
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }

        .timeline-content:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateX(4px);
        }

        .timeline-content .timeline-phase {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 700;
            color: var(--primary);
            background: var(--primary-soft);
            padding: 0.25rem 0.75rem;
            border-radius: var(--radius-badge);
            margin-bottom: 0.625rem;
            letter-spacing: 0.04em;
        }

        .timeline-content h3 {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 0.375rem;
        }

        .timeline-content p {
            margin-bottom: 0;
            color: var(--text-body);
            font-size: 0.9375rem;
            line-height: 1.7;
        }

        /* ===== 数据块 ===== */
        .stats-section {
            background: var(--bg-alt);
            padding: var(--space-section) 0;
        }

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

        .stat-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            padding: 2rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            border: 1px solid transparent;
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--primary);
        }

        .stat-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 1rem;
            border-radius: var(--radius-btn);
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
        }

        .stat-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 0.375rem;
        }

        .stat-card p {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== 应用场景 ===== */
        .scene-section {
            background: var(--bg-white);
            padding: var(--space-section) 0;
        }

        .scene-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .scene-card {
            display: flex;
            gap: 1.25rem;
            background: var(--bg-page);
            border-radius: var(--radius-card);
            padding: 1.75rem;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

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

        .scene-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: var(--radius-btn);
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: var(--primary);
        }

        .scene-body h3 {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 0.375rem;
        }

        .scene-body p {
            font-size: 0.9375rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-alt);
            padding: var(--space-section) 0;
        }

        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }

        /* ===== CTA 区 ===== */
        .cta-section {
            background: var(--bg-white);
            padding: var(--space-section) 0;
        }

        .cta-box {
            background: var(--bg-alt);
            border-radius: 20px;
            padding: 3rem 2rem;
            text-align: center;
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(74, 123, 167, 0.06);
        }

        .cta-box::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -60px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(217, 179, 132, 0.12);
        }

        .cta-box > * {
            position: relative;
            z-index: 1;
        }

        .cta-box h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 0.75rem;
        }

        .cta-box p {
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto 1.75rem;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 0.875rem;
        }

        .cta-brand-tip {
            display: inline-block;
            margin-top: 1.25rem;
            font-size: 0.875rem;
            color: var(--text-muted);
            background: var(--bg-white);
            border-radius: var(--radius-badge);
            padding: 0.375rem 1rem;
            box-shadow: var(--shadow-card);
        }

        .cta-brand-tip strong {
            color: var(--primary);
        }

        /* ===== 返回入口 ===== */
        .back-home-section {
            background: var(--bg-page);
            padding: 3rem 0;
            text-align: center;
        }

        .back-home-section a {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-muted);
            transition: all 0.3s ease;
        }

        .back-home-section a:hover {
            color: var(--primary);
            gap: 0.75rem;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--text-heading);
            padding: 3.5rem 0 1.5rem;
            color: #C8D2DE;
        }

        .site-footer .footer-brand {
            font-size: 1.375rem;
            font-weight: 700;
            color: #E8EEF4;
            margin-bottom: 0.75rem;
        }

        .site-footer .footer-brand strong {
            color: var(--primary-light);
        }

        .site-footer .footer-desc {
            font-size: 0.9375rem;
            line-height: 1.8;
            color: #9FB0C0;
            margin-bottom: 0;
        }

        .site-footer .footer-title {
            font-size: 1rem;
            font-weight: 600;
            color: #E8EEF4;
            margin-bottom: 1rem;
        }

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

        .site-footer .footer-links li {
            margin-bottom: 0.5rem;
        }

        .site-footer .footer-links a {
            color: #9FB0C0;
            font-size: 0.9375rem;
            transition: color 0.3s ease;
        }

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

        .site-footer .footer-contact p {
            font-size: 0.9375rem;
            color: #9FB0C0;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .footer-bottom {
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            font-size: 0.875rem;
            color: #8CA0B4;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 992px) {
            .focus-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .intro-card {
                flex-direction: column;
                gap: 2rem;
            }

            .intro-media {
                flex: none;
                width: 100%;
                max-width: 560px;
            }

            .page-hero .hero-bg {
                display: none;
            }

            :root {
                --space-section: 72px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                height: 64px;
            }

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

            .page-hero {
                padding: 48px 0 40px;
            }

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

            .page-hero .hero-actions {
                flex-direction: column;
                align-items: flex-start;
            }

            .section-head h2 {
                font-size: 1.5rem;
            }

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

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

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

            .timeline::before {
                left: 18px;
            }

            .timeline-item {
                padding-left: 60px;
            }

            .timeline-dot {
                left: 8px;
                width: 22px;
                height: 22px;
            }

            .cta-box {
                padding: 2rem 1.25rem;
            }

            .cta-box h2 {
                font-size: 1.375rem;
            }

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

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

            :root {
                --space-section: 56px;
            }
        }

        @media (max-width: 576px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }

            .intro-points li {
                flex-direction: column;
                gap: 0.25rem;
            }

            .focus-card-body {
                padding: 1.25rem;
            }

            .timeline-content {
                padding: 1.25rem;
            }

            .footer-bottom {
                font-size: 0.8125rem;
            }
        }

        /* ===== 焦点可访问性 ===== */
        a:focus-visible,
        button:focus-visible,
        .btn:focus-visible {
            outline: 3px solid rgba(74, 123, 167, 0.4);
            outline-offset: 2px;
        }

/* roulang page: category2 */
:root {
            --primary: #4A7BA7;
            --primary-light: #5B8DB8;
            --primary-soft: rgba(74, 123, 167, 0.1);
            --accent: #D9B57A;
            --accent-soft: #F5EDDE;
            --bg: #F8FAFC;
            --bg-alt: #F0F4F8;
            --white: #FFFFFF;
            --text-dark: #23303D;
            --text-body: #3C4A5A;
            --text-muted: #8895A3;
            --border: #E3E9EF;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow: 0 4px 16px rgba(35, 48, 61, 0.06);
            --shadow-hover: 0 8px 24px rgba(35, 48, 61, 0.1);
            --font-stack: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-stack);
            font-size: 1rem;
            line-height: 1.8;
            color: var(--text-body);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            font-weight: 700;
            line-height: 1.35;
            margin-top: 0;
        }

        p {
            margin: 0 0 1rem;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 10px;
        }

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

        .section-padding {
            padding: 80px 0;
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 640px;
            margin-bottom: 40px;
        }

        .text-accent {
            color: var(--accent);
        }

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

        .btn {
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 10px 24px;
            transition: all 0.3s ease;
            border: 2px solid transparent;
        }

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

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

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

        .btn-outline-custom:hover {
            background-color: var(--primary-soft);
            border-color: var(--primary);
            color: var(--text-dark);
        }

        /* ===== Header ===== */
        .site-header {
            background: var(--white);
            border-bottom: 1px solid var(--border);
            height: 72px;
            position: sticky;
            top: 0;
            z-index: 1030;
        }

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

        .brand-logo {
            display: inline-flex;
            align-items: baseline;
            text-decoration: none;
            font-size: 1.45rem;
            line-height: 1;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .brand-logo .brand-name {
            color: var(--text-dark);
            font-weight: 400;
        }

        .brand-logo .brand-name strong {
            color: var(--primary);
            font-weight: 700;
        }

        .desktop-nav .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .desktop-nav .nav-link-text {
            display: inline-block;
            padding: 8px 14px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 6px;
            position: relative;
            text-decoration: none;
        }

        .desktop-nav .nav-link-text:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }

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

        .desktop-nav .nav-link-text.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-left,
        .nav-right {
            min-width: 240px;
        }

        .nav-right {
            justify-content: flex-end;
        }

        .btn-nav {
            background: transparent;
            border: none;
            font-size: 1.2rem;
            color: var(--text-dark);
            width: 40px;
            height: 40px;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: background 0.25s;
        }

        .btn-nav:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }

        .mobile-nav-panel {
            background: var(--white);
            box-shadow: var(--shadow-hover);
        }

        .mobile-nav-panel .offcanvas-header {
            border-bottom: 1px solid var(--border);
            padding: 16px 20px;
        }

        .mobile-nav-panel .offcanvas-title {
            font-size: 1.3rem;
            margin: 0;
        }

        .mobile-nav-panel .offcanvas-title strong {
            color: var(--primary);
        }

        .mobile-nav-links {
            list-style: none;
            margin: 0;
            padding: 12px 0;
        }

        .mobile-nav-links li {
            border-bottom: 1px solid var(--bg-alt);
        }

        .mobile-nav-links li:last-child {
            border-bottom: none;
        }

        .mobile-nav-links a {
            display: block;
            padding: 14px 20px;
            font-size: 1rem;
            color: var(--text-body);
            text-decoration: none;
            border-radius: 0;
        }

        .mobile-nav-links a:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }

        .mobile-nav-links a.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-soft);
        }

        /* ===== Page Hero ===== */
        .page-hero {
            background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
            padding: 72px 0 56px;
            border-bottom: 1px solid var(--border);
        }

        .page-hero .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            list-style: none;
            padding: 0;
        }

        .page-hero .breadcrumb-custom a {
            color: var(--text-muted);
            text-decoration: none;
        }

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

        .page-hero .breadcrumb-custom .divider {
            color: var(--text-muted);
            opacity: 0.5;
        }

        .page-hero .breadcrumb-custom .active {
            color: var(--text-dark);
            font-weight: 600;
        }

        .page-hero h1 {
            font-size: 2.25rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .page-hero .hero-lead {
            font-size: 1.125rem;
            color: var(--text-body);
            max-width: 680px;
            margin-bottom: 0;
        }

        /* ===== Service Overview ===== */
        .services-overview {
            background: var(--white);
        }

        .service-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 28px;
            height: 100%;
            box-shadow: var(--shadow);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
            position: relative;
        }

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

        .service-card .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: 12px;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .service-card p {
            color: var(--text-body);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* ===== Process ===== */
        .process-section {
            background: var(--bg-alt);
        }

        .process-step {
            text-align: center;
            padding: 32px 20px;
            background: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            height: 100%;
            border: 1px solid var(--border);
        }

        .process-step .step-num {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .process-step h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== Advantages ===== */
        .adv-card {
            padding: 28px 24px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            height: 100%;
            box-shadow: var(--shadow);
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }

        .adv-card .adv-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: var(--accent-soft);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }

        .adv-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .adv-card p {
            font-size: 0.9rem;
            color: var(--text-body);
            margin-bottom: 0;
        }

        /* ===== Featured Content ===== */
        .featured-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .featured-card .cover-wrap {
            overflow: hidden;
            border-radius: 0;
            aspect-ratio: 16 / 9;
        }

        .featured-card .cover-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.4s ease;
        }

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

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

        .featured-card .featured-body .badge-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--primary-soft);
            color: var(--primary);
            border-radius: 999px;
            padding: 4px 14px;
            margin-bottom: 12px;
            align-self: flex-start;
        }

        .featured-card .featured-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .featured-card .featured-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        .featured-card .featured-body .featured-link {
            margin-top: auto;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .featured-card .featured-body .featured-link:hover {
            gap: 10px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--white);
        }

        .accordion-custom {
            max-width: 820px;
        }

        .accordion-custom .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--white);
        }

        .accordion-custom .accordion-button {
            background: var(--white);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 1rem;
            padding: 18px 24px;
            border: none;
            box-shadow: none;
        }

        .accordion-custom .accordion-button::after {
            background-image: none;
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            content: "\f067";
            color: var(--primary);
            font-size: 0.875rem;
            transition: transform 0.3s;
        }

        .accordion-custom .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--bg-alt);
            color: var(--primary);
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 0.2rem rgba(74, 123, 167, 0.15);
            border-color: var(--primary);
        }

        .accordion-custom .accordion-body {
            background: var(--bg-alt);
            padding: 16px 24px 20px;
            color: var(--text-body);
            font-size: 0.95rem;
            border-top: 1px solid var(--border);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-alt);
        }

        .cta-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .cta-card h2 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-card p {
            color: var(--text-muted);
            max-width: 520px;
            margin: 0 auto 28px;
        }

        .cta-card .cta-btns {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--text-dark);
            color: #B8C4CE;
            padding: 60px 0 0;
            margin-top: 0;
        }

        .site-footer .footer-brand {
            font-size: 1.4rem;
            margin-bottom: 14px;
        }

        .site-footer .footer-brand strong {
            color: var(--primary-light);
        }

        .site-footer .footer-desc {
            font-size: 0.9rem;
            line-height: 1.8;
            color: #9AA9B6;
        }

        .site-footer .footer-title {
            color: #E8EDF2;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

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

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

        .site-footer .footer-links a {
            color: #94A3B3;
            font-size: 0.875rem;
            text-decoration: none;
            transition: color 0.25s;
        }

        .site-footer .footer-links a:hover {
            color: var(--primary-light);
        }

        .site-footer .footer-contact p {
            font-size: 0.875rem;
            color: #94A3B3;
            margin-bottom: 0;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 18px 0;
            margin-top: 40px;
            text-align: center;
            font-size: 0.85rem;
            color: #7E8E9C;
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .desktop-nav .nav-link-text {
                padding: 6px 10px;
                font-size: 0.88rem;
            }
        }

        @media (max-width: 767.98px) {
            body {
                font-size: 0.95rem;
            }

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

            .section-title {
                font-size: 1.5rem;
            }

            .page-hero {
                padding: 48px 0 40px;
            }

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

            .page-hero .hero-lead {
                font-size: 0.95rem;
            }

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

            .service-card .icon-wrap {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
            }

            .process-step {
                padding: 24px 16px;
                margin-bottom: 16px;
            }

            .adv-card {
                padding: 20px 16px;
                flex-direction: column;
                gap: 12px;
            }

            .cta-card {
                padding: 40px 20px;
            }

            .cta-card h2 {
                font-size: 1.4rem;
            }

            .site-footer {
                padding-top: 40px;
            }
        }

        @media (max-width: 520px) {
            .brand-logo {
                font-size: 1.2rem;
            }

            .page-hero h1 {
                font-size: 1.5rem;
            }

            .section-title {
                font-size: 1.3rem;
            }

            .cta-btns .btn {
                width: 100%;
                margin-bottom: 8px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #4A7BA7;
            --primary-dark: #3B648A;
            --primary-light: rgba(74, 123, 167, .1);
            --accent: #D9A441;
            --accent-light: rgba(217, 164, 65, .12);
            --bg: #F8FAFC;
            --bg-alt: #F0F4F8;
            --card-bg: #ffffff;
            --title: #23303D;
            --text: #3C4A5A;
            --muted: #8895A3;
            --border: #E3E9EF;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-tag: 999px;
            --shadow-sm: 0 4px 16px rgba(35, 48, 61, .06);
            --shadow-lg: 0 8px 24px rgba(35, 48, 61, .1);
            --font-stack: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.8;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        .container {
            max-width: 1200px;
        }

        ::selection {
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 1px 8px rgba(35, 48, 61, .03);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
            position: relative;
        }

        .brand-logo {
            text-decoration: none;
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            white-space: nowrap;
        }

        .brand-logo:hover {
            text-decoration: none;
        }

        .brand-name {
            font-size: 1.25rem;
            color: var(--title);
            font-weight: 600;
            letter-spacing: .5px;
        }

        .brand-name strong {
            color: var(--primary);
            font-weight: 800;
        }

        .desktop-nav .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-link-text {
            display: inline-block;
            padding: 8px 14px;
            color: var(--text);
            font-size: .95rem;
            font-weight: 500;
            border-radius: 6px;
            position: relative;
            text-decoration: none;
            transition: color .2s ease;
        }

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

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

        .nav-link-text.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .btn-nav {
            background: transparent;
            border: 1px solid var(--border);
            width: 40px;
            height: 40px;
            border-radius: 8px;
            color: var(--title);
            font-size: 1.1rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .2s ease;
        }

        .btn-nav:hover {
            background: var(--bg-alt);
            color: var(--primary);
            border-color: var(--primary);
        }

        .mobile-nav-panel {
            width: min(300px, 85vw);
        }

        .mobile-nav-panel .offcanvas-header {
            padding: 20px;
            border-bottom: 1px solid var(--border);
        }

        .mobile-nav-panel .offcanvas-title {
            font-size: 1.1rem;
            color: var(--title);
            font-weight: 600;
        }

        .mobile-nav-panel .offcanvas-title strong {
            color: var(--primary);
        }

        .mobile-nav-links {
            list-style: none;
            margin: 0;
            padding: 12px 20px;
        }

        .mobile-nav-links li {
            margin-bottom: 4px;
        }

        .mobile-nav-links a {
            display: block;
            padding: 13px 10px;
            border-radius: 10px;
            color: var(--text);
            font-size: .95rem;
            font-weight: 500;
            text-decoration: none;
            transition: all .2s ease;
        }

        .mobile-nav-links a:hover {
            background: var(--primary-light);
            color: var(--primary);
            padding-left: 16px;
        }

        .mobile-nav-links a.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 700;
            padding-left: 16px;
        }

        /* ========== Page Hero ========== */
        .page-hero {
            background: linear-gradient(135deg, #F0F5FA 0%, #E8F0F7 100%);
            padding: 72px 0 64px;
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            right: -60px;
            top: -60px;
            background: rgba(74, 123, 167, .06);
        }

        .page-hero::after {
            content: "";
            position: absolute;
            left: 10%;
            bottom: -80px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(217, 164, 65, .05);
        }

        .page-hero-inner {
            position: relative;
            z-index: 2;
        }

        .hero-kicker {
            color: var(--primary);
            font-size: .875rem;
            letter-spacing: 2px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .page-hero h1 {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--title);
            margin-bottom: 12px;
        }

        .hero-intro {
            font-size: 1.0625rem;
            color: var(--text);
            max-width: 620px;
            margin-bottom: 0;
        }

        .hero-picture {
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            width: 100%;
            height: 220px;
            object-fit: cover;
            background: var(--bg-alt);
        }

        /* ========== Topic Strip ========== */
        .topic-strip {
            padding: 32px 0;
            border-bottom: 1px solid var(--border);
            background: #fff;
        }

        .topic-tags {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
        }

        .topic-label {
            font-size: .875rem;
            color: var(--title);
            font-weight: 700;
            margin-right: 6px;
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            border-radius: var(--radius-tag);
            background: var(--primary-light);
            color: var(--primary);
            font-size: .875rem;
            font-weight: 500;
            text-decoration: none;
            transition: background .2s ease, color .2s ease;
        }

        .tag-pill:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ========== Section Base ========== */
        .section-block {
            padding: 80px 0;
        }

        .section-block.bg-light {
            background: var(--bg-alt);
        }

        .section-head {
            margin-bottom: 40px;
            text-align: center;
            max-width: 720px;
            margin-left: auto;
            margin-right: auto;
        }

        .section-head.left {
            text-align: left;
            margin-left: 0;
            margin-bottom: 28px;
        }

        .section-head h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--title);
            margin-bottom: 12px;
        }

        .section-head p {
            color: var(--muted);
            font-size: 1rem;
            margin-bottom: 0;
        }

        /* ========== Insight Card ========== */
        .insight-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            height: 100%;
            transition: transform .3s ease, box-shadow .3s ease;
            display: flex;
            flex-direction: column;
        }

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

        .card-media {
            position: relative;
            overflow: hidden;
            display: block;
        }

        .card-media img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            transition: transform .3s ease;
            background: var(--bg-alt);
        }

        .insight-card:hover .card-media img {
            transform: scale(1.03);
        }

        .card-badge {
            position: absolute;
            left: 14px;
            top: 14px;
            padding: 4px 12px;
            background: rgba(255, 255, 255, .92);
            color: var(--primary);
            font-size: .75rem;
            font-weight: 600;
            border-radius: var(--radius-tag);
            box-shadow: 0 2px 8px rgba(35, 48, 61, .08);
        }

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

        .insight-card h3 {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--title);
            margin-bottom: 10px;
            line-height: 1.6;
        }

        .insight-card p {
            color: var(--muted);
            font-size: .925rem;
            line-height: 1.8;
            margin-bottom: 16px;
            flex: 1;
        }

        .card-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 600;
            font-size: .875rem;
            text-decoration: none;
        }

        .card-more i {
            transition: transform .2s ease;
        }

        .card-more:hover {
            color: var(--primary-dark);
        }

        .card-more:hover i {
            transform: translateX(4px);
        }

        /* ========== Dimension ========== */
        .dimension-section {
            padding: 80px 0;
            background: #fff;
        }

        .dimension-img {
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            width: 100%;
            height: 320px;
            object-fit: cover;
            background: var(--bg-alt);
        }

        .dimension-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .dimension-list li {
            display: flex;
            gap: 16px;
            padding: 18px 0;
            border-bottom: 1px solid var(--border);
        }

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

        .dimension-list li i {
            flex: 0 0 44px;
            height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 10px;
            font-size: 1.1rem;
        }

        .dimension-list li strong {
            color: var(--title);
            font-size: 1rem;
            display: block;
            margin-bottom: 4px;
        }

        .dimension-list li p {
            color: var(--muted);
            font-size: .9rem;
            margin: 0;
        }

        /* ========== Related Card ========== */
        .relate-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px 26px;
            height: 100%;
            transition: all .3s ease;
            display: flex;
            flex-direction: column;
        }

        .relate-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: transparent;
        }

        .relate-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            margin-bottom: 18px;
        }

        .relate-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--title);
            margin-bottom: 8px;
        }

        .relate-card p {
            color: var(--muted);
            font-size: .9rem;
            margin-bottom: 16px;
        }

        .relate-link {
            color: var(--primary);
            font-weight: 600;
            font-size: .9rem;
            text-decoration: none;
            margin-top: auto;
        }

        .relate-link:hover {
            color: var(--primary-dark);
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, #EEF4F9 0%, #E2ECF4 100%);
        }

        .cta-card {
            background: #fff;
            border-radius: 16px;
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            max-width: 760px;
            margin: 0 auto;
        }

        .cta-card h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--title);
            margin-bottom: 10px;
        }

        .cta-card p {
            color: var(--muted);
            font-size: 1rem;
            margin-bottom: 24px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-actions {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== Buttons ========== */
        .btn-main {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            border: 1px solid var(--primary);
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: .95rem;
            transition: all .25s ease;
        }

        .btn-main:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(74, 123, 167, .25);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--primary);
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: .95rem;
            transition: all .25s ease;
        }

        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 80px 0;
            background: #fff;
        }

        .custom-accordion {
            --bs-accordion-btn-icon: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%234A7BA7'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
            --bs-accordion-btn-active-icon: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%234A7BA7'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
        }

        .custom-accordion .accordion-item {
            border: 1px solid var(--border);
            border-radius: 12px !important;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .custom-accordion .accordion-button {
            background: #fff;
            color: var(--title);
            font-weight: 600;
            font-size: 1rem;
            padding: 18px 22px;
            box-shadow: none;
        }

        .custom-accordion .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary);
        }

        .custom-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: var(--primary);
        }

        .custom-accordion .accordion-body {
            background: var(--bg);
            color: var(--text);
            font-size: .95rem;
            padding: 18px 22px;
            border-top: 1px solid var(--border);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #23303D;
            color: #B8C7D6;
            padding: 64px 0 0;
        }

        .footer-brand {
            color: #fff;
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .footer-brand strong {
            color: #8FBADB;
        }

        .footer-desc {
            color: #9DADBE;
            font-size: .9rem;
            max-width: 320px;
            margin-bottom: 0;
        }

        .footer-title {
            color: #DCE6EF;
            font-size: .95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

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

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

        .footer-links a {
            color: #9DADBE;
            font-size: .9rem;
            text-decoration: none;
            transition: all .2s ease;
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 6px;
        }

        .footer-contact p {
            color: #9DADBE;
            font-size: .9rem;
            margin-bottom: 0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            margin-top: 48px;
            padding: 20px 0 24px;
            text-align: center;
            color: #7E93A5;
            font-size: .85rem;
        }

        /* ========== Responsive ========== */
        @media (max-width: 991.98px) {
            .header-inner {
                height: 64px;
            }

            .brand-logo {
                position: static;
                transform: none;
                margin: 0 auto;
            }

            .page-hero {
                padding: 56px 0 48px;
            }

            .page-hero h1 {
                font-size: 2rem;
            }

            .section-block,
            .dimension-section,
            .faq-section,
            .cta-section {
                padding: 56px 0;
            }

            .section-head {
                margin-bottom: 28px;
            }
        }

        @media (max-width: 767.98px) {
            .header-inner {
                justify-content: space-between;
                gap: 10px;
            }

            .desktop-nav {
                display: none !important;
            }

            .page-hero {
                padding: 48px 0 40px;
            }

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

            .hero-intro {
                font-size: .95rem;
            }

            .section-head h2 {
                font-size: 1.4rem;
            }

            .cta-card {
                padding: 32px 20px;
            }

            .dimension-img {
                height: 240px;
                margin-bottom: 24px;
            }

            .insight-card .card-media img {
                height: 200px;
            }

            .hero-picture {
                height: 180px;
            }
        }

/* roulang page: category4 */
:root {
  --primary: #4A7BA7;
  --primary-dark: #3D6C95;
  --primary-light: #EEF3F8;
  --accent: #D9B98A;
  --bg: #F8FAFC;
  --bg-alt: #F0F4F8;
  --white: #FFFFFF;
  --text: #23303D;
  --text-body: #3C4A5A;
  --text-muted: #8895A3;
  --border: #E3E9EF;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-tag: 999px;
  --shadow-card: 0 4px 16px rgba(35, 48, 61, 0.06);
  --shadow-hover: 0 8px 24px rgba(35, 48, 61, 0.1);
  --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-family);
  background-color: var(--bg);
  color: var(--text-body);
  line-height: 1.8;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color .25s ease;
}

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

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

button {
  font-family: inherit;
}

.container {
  max-width: 1200px;
}

.container, .container-lg, .container-md, .container-sm, .container-xl {
  padding-left: 24px;
  padding-right: 24px;
}

.row {
  --bs-gutter-x: 24px;
  --bs-gutter-y: 24px;
}

:focus-visible {
  outline: 2px solid rgba(74, 123, 167, 0.5);
  outline-offset: 2px;
}

.site-header {
  position: relative;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  height: 72px;
  z-index: 100;
}

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

.btn-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  background: var(--white);
  color: var(--text);
  font-size: 1rem;
  transition: border-color .25s ease, background-color .25s ease, color .25s ease;
}

.btn-nav:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}

.brand-logo {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  z-index: 2;
}

.brand-logo:hover {
  text-decoration: none;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: .5px;
  line-height: 1.3;
}

.brand-name strong {
  color: var(--primary);
  font-weight: 800;
}

.desktop-nav .nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link-text {
  position: relative;
  display: inline-block;
  padding: 8px 2px;
  font-size: .95rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  line-height: 1.4;
  transition: color .25s ease, border-color .25s ease;
}

.nav-link-text:hover {
  color: var(--primary-dark);
  border-bottom-color: rgba(74, 123, 167, 0.3);
}

.nav-link-text.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.nav-link-text.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -2px;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--primary);
}

.mobile-nav-panel {
  width: 300px;
  background: var(--white);
}

.mobile-nav-panel .offcanvas-title {
  font-size: 1.1rem;
  color: var(--text);
}

.mobile-nav-panel .offcanvas-title strong {
  color: var(--primary);
}

.mobile-nav-panel .btn-close:focus {
  box-shadow: none;
}

.mobile-nav-links {
  list-style: none;
  margin: 0;
  padding: 8px 4px;
}

.mobile-nav-links li + li {
  margin-top: 4px;
}

.mobile-nav-links a {
  display: block;
  padding: 12px 16px;
  border-radius: var(--radius-btn);
  font-size: 1rem;
  color: var(--text-body);
  font-weight: 500;
  text-decoration: none;
  transition: background-color .25s ease, color .25s ease;
}

.mobile-nav-links a:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.mobile-nav-links a.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
}

.page-hero {
  position: relative;
  background: linear-gradient(180deg, #EDF2F7 0%, #F8FAFC 100%);
  padding: 88px 0;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: .08;
  pointer-events: none;
}

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

.breadcrumb-custom {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: .875rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumb-custom a {
  color: var(--text-muted);
  text-decoration: none;
}

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

.breadcrumb-custom .separator {
  color: var(--border);
  font-size: .8rem;
}

.page-hero h1 {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 16px;
  letter-spacing: .5px;
  line-height: 1.3;
}

.page-hero .lead {
  font-size: 1.125rem;
  line-height: 1.9;
  color: var(--text-body);
  max-width: 720px;
  margin: 0 0 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  transition: all .25s ease;
  line-height: 1.5;
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(74, 123, 167, 0.18);
}

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

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

.btn-outline:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary-dark);
  transform: translateY(-2px);
}

.section {
  padding: 80px 0;
}

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

.section-header {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-header h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 12px;
  line-height: 1.4;
}

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

.case-card {
  position: relative;
  background: var(--white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: box-shadow .3s ease, transform .3s ease;
}

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

.case-card .case-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.case-card .case-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}

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

.badge-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  display: inline-block;
  padding: 5px 14px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--primary);
  font-size: .8rem;
  font-weight: 600;
  border-radius: var(--radius-tag);
  box-shadow: 0 2px 8px rgba(35, 48, 61, 0.06);
  backdrop-filter: none;
  letter-spacing: .3px;
}

.case-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.case-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 12px;
  line-height: 1.5;
}

.case-body p {
  font-size: .95rem;
  color: var(--text-body);
  line-height: 1.8;
  margin: 0 0 20px;
  flex: 1;
}

.case-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .925rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  transition: color .25s ease, gap .25s ease;
}

.case-link i {
  font-size: .8rem;
  transition: transform .25s ease;
}

.case-link:hover {
  color: var(--primary-dark);
}

.case-link:hover i {
  transform: translateX(4px);
}

.service-grid .service-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px;
  height: 100%;
  transition: box-shadow .3s ease, transform .3s ease, border-color .3s ease;
}

.service-grid .service-card:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-3px);
  border-color: rgba(74, 123, 167, 0.3);
}

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-btn);
  background: var(--primary-light);
  color: var(--primary);
  font-size: 1.25rem;
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 10px;
  line-height: 1.5;
}

.service-card p {
  font-size: .95rem;
  color: var(--text-body);
  line-height: 1.8;
  margin: 0;
}

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

.industry-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 20px 24px;
  transition: box-shadow .3s ease, transform .3s ease, border-color .3s ease;
}

.industry-item:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-3px);
  border-color: rgba(74, 123, 167, 0.3);
}

.industry-item .industry-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-btn);
  background: var(--primary-light);
  color: var(--primary);
  font-size: 1.1rem;
}

.industry-item span {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
}

.process-steps .process-card {
  position: relative;
  background: var(--white);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  height: 100%;
  border: 1px solid var(--border);
  transition: box-shadow .3s ease, transform .3s ease;
}

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

.process-num {
  font-size: 2rem;
  font-weight: 800;
  color: rgba(74, 123, 167, 0.18);
  line-height: 1;
  margin-bottom: 20px;
  display: block;
}

.process-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 10px;
  line-height: 1.5;
}

.process-card p {
  font-size: .925rem;
  color: var(--text-body);
  line-height: 1.8;
  margin: 0;
}

.faq-section .section-header {
  margin-bottom: 32px;
}

.faq-panel .accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--white);
  margin-bottom: 16px;
}

.faq-panel .accordion-button {
  background: var(--white);
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  padding: 20px 24px;
  line-height: 1.6;
  box-shadow: none;
  border: none;
}

.faq-panel .accordion-button:not(.collapsed) {
  background: var(--primary-light);
  color: var(--text);
  box-shadow: none;
}

.faq-panel .accordion-button:focus {
  box-shadow: none;
  border-color: var(--primary);
}

.faq-panel .accordion-button::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%234A7BA7' viewBox='0 0 16 16'%3e%3cpath fill-rule='evenodd' d='M8 2a.75.75 0 0 1 .75.75v4.5h4.5a.75.75 0 0 1 0 1.5h-4.5v4.5a.75.75 0 0 1-1.5 0v-4.5h-4.5a.75.75 0 0 1 0-1.5h4.5v-4.5A.75.75 0 0 1 8 2'/%3e%3c/svg%3e");
  background-size: 1rem;
  width: 1.25rem;
  height: 1.25rem;
  transition: transform .25s ease;
}

.faq-panel .accordion-button:not(.collapsed)::after {
  transform: rotate(45deg);
}

.faq-panel .accordion-body {
  background: var(--primary-light);
  color: var(--text-body);
  font-size: .95rem;
  line-height: 1.8;
  padding: 8px 24px 24px;
  border-top: 1px solid rgba(74, 123, 167, 0.08);
}

.cta-section {
  padding: 40px 0 88px;
}

.cta-box {
  background: var(--white);
  border-radius: 16px;
  padding: 48px 40px;
  text-align: center;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
}

.cta-box h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 12px;
  line-height: 1.5;
}

.cta-box p {
  font-size: 1rem;
  color: var(--text-body);
  max-width: 640px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

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

.site-footer {
  background: #23303D;
  color: #AAB6C2;
  padding: 64px 0 0;
  font-size: .95rem;
}

.site-footer .footer-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 16px;
}

.site-footer .footer-brand strong {
  color: #7FB0D8;
}

.footer-desc {
  color: #AAB6C2;
  line-height: 1.8;
  margin: 0;
  max-width: 340px;
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  color: #D8E0E8;
  margin-bottom: 18px;
}

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

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

.footer-links a {
  color: #AAB6C2;
  text-decoration: none;
  transition: color .25s ease;
}

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

.footer-contact p {
  color: #AAB6C2;
  line-height: 1.8;
  margin: 0;
}

.footer-bottom {
  margin-top: 48px;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
  color: #8D9AA6;
  font-size: .875rem;
}

@media (max-width: 991.98px) {
  .industry-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-steps .col-md-6 {
    margin-bottom: 12px;
  }
}

@media (max-width: 767.98px) {
  .site-header {
    height: 64px;
  }

  .header-inner {
    height: 64px;
  }

  .brand-name {
    font-size: 1.1rem;
  }

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

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

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

  .section {
    padding: 56px 0;
  }

  .section-header h2 {
    font-size: 1.5rem;
  }

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

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

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

  .industry-list {
    grid-template-columns: 1fr;
  }

  .cta-section {
    padding-top: 24px;
  }

  .cta-box {
    padding: 36px 24px;
  }

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

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

  .footer-bottom {
    font-size: .8125rem;
  }
}

@media (max-width: 575.98px) {
  .container, .container-sm {
    padding-left: 20px;
    padding-right: 20px;
  }

  .case-body {
    padding: 20px;
  }

  .service-grid .service-card {
    padding: 24px 20px;
  }

  .industry-item {
    padding: 16px 20px;
  }

  .process-steps .process-card {
    padding: 24px 20px;
  }
}