/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --primary: #1E6FD9;
  --primary-dark: #155AB0;
  --primary-active: #104180;
  --primary-soft: #E8F1FC;
  --accent: #FF7A45;
  --accent-soft: #FFF3EE;
  --bg: #F7FAFD;
  --bg-alt: #F2F7FC;
  --text-main: #132A3D;
  --text-sub: #526B7E;
  --text-muted: #8A9BA9;
  --border: #DCE8F2;
  --border-card: #E3EDF6;
  --success: #23A574;
  --warning: #E6A23C;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 36px;
  --radius-btn: 12px;
  --shadow: 0 6px 24px rgba(19,42,61,0.06);
  --shadow-hover: 0 12px 32px rgba(19,42,61,0.12);
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; outline: none; }
.container { max-width: 1200px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }
@media (min-width: 768px) {
  .container { padding-left: 28px; padding-right: 28px; }
}

/* ========== Header / Nav ========== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 72px;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(220,232,242,0.7);
  transition: box-shadow .3s ease;
}
.site-header.scrolled {
  box-shadow: 0 6px 24px rgba(19,42,61,0.06);
}
.header-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, #1E6FD9 0%, #155AB0 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -1px;
  box-shadow: 0 4px 14px rgba(30,111,217,0.25);
}
.logo-text {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.logo-text em {
  font-style: normal;
  color: var(--primary);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}
.nav-link {
  font-size: 15.5px;
  font-weight: 500;
  color: var(--text-sub);
  position: relative;
  padding: 6px 2px;
  transition: color .25s ease;
  white-space: nowrap;
}
.nav-link:hover { color: var(--primary); }
.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: all .25s ease;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  height: 44px;
  padding: 0 26px;
  font-size: 15px;
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(30,111,217,0.25);
}
.btn-primary:active {
  transform: translateY(0);
  background: var(--primary-active);
}
.btn-outline {
  background: #fff;
  color: var(--primary);
  border: 1.5px solid var(--primary);
  height: 48px;
  padding: 0 26px;
  font-size: 16px;
}
.btn-outline:hover {
  background: var(--primary-soft);
  transform: translateY(-1px);
}
.btn-accent {
  background: var(--accent);
  color: #2B1A12;
  height: 48px;
  padding: 0 28px;
  font-size: 16px;
}
.btn-accent:hover {
  background: #ff8b5e;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(255,122,69,0.25);
}
.btn-nav { height: 42px; padding: 0 24px; }
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--text-main);
  transition: all .3s ease;
}
.mobile-nav {
  position: fixed;
  top: 72px;
  left: 0; right: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 16px 32px rgba(19,42,61,0.1);
  padding: 20px 24px 28px;
  z-index: 99;
  display: none;
  flex-direction: column;
  gap: 4px;
}
.mobile-nav.open { display: flex; }
.mobile-nav .nav-link {
  display: block;
  padding: 14px 12px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-main);
  border-radius: 10px;
  border-bottom: 1px solid rgba(227,237,246,0.6);
}
.mobile-nav .nav-link.active {
  color: var(--primary);
  background: var(--primary-soft);
}
.mobile-nav .nav-link.active::after { display: none; }
.mobile-nav .btn {
  margin-top: 14px;
  width: 100%;
}

/* ========== Hero ========== */
.hero {
  position: relative;
  padding: 150px 0 90px;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.42);
}
.hero::after {
  content: '';
  position: absolute;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: rgba(232,241,252,0.5);
  filter: blur(80px);
  right: -180px;
  top: -120px;
  z-index: 0;
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}
.hero-title {
  font-size: clamp(40px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-main);
  letter-spacing: 0.5px;
  margin-bottom: 22px;
}
.hero-title .hl {
  color: var(--primary);
  position: relative;
  white-space: nowrap;
}
.hero-title .hl::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 6px;
  height: 8px;
  background: rgba(30,111,217,0.15);
  border-radius: 4px;
  z-index: -1;
}
.hero-sub {
  font-size: 17.5px;
  line-height: 1.8;
  color: var(--text-sub);
  max-width: 620px;
  margin-bottom: 34px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  aspect-ratio: 4/3;
}
.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.hero-visual:hover img { transform: scale(1.02); }
.hero-badge {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 2;
  background: var(--accent);
  color: #2B1A12;
  font-size: 13px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(255,122,69,0.3);
  display: flex;
  align-items: center;
  gap: 6px;
}
.hero-badge svg { width: 14px; height: 14px; }
.hero-stats {
  position: absolute;
  bottom: 18px;
  left: 18px;
  right: 18px;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border-radius: 14px;
  padding: 16px 18px;
  display: flex;
  justify-content: space-around;
  gap: 8px;
  box-shadow: 0 8px 24px rgba(19,42,61,0.08);
}
.hero-stats .stat-item {
  text-align: center;
  flex: 1;
}
.hero-stats .stat-num {
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}
.hero-stats .stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ========== 数据信任条 ========== */
.trust-bar {
  margin-top: -36px;
  position: relative;
  z-index: 5;
  margin-bottom: 20px;
}
.trust-bar-inner {
  background: #F4F7FA;
  border-radius: var(--radius);
  padding: 28px 30px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  border: 1px solid rgba(220,232,242,0.8);
}
.trust-item {
  text-align: center;
  padding: 6px 10px;
}
.trust-item .t-num {
  font-size: 34px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 4px;
}
.trust-item .t-label {
  font-size: 14px;
  color: var(--text-sub);
}

/* ========== Section 通用 ========== */
.section { padding: 72px 0; }
.section-alt { background: #fff; }
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 42px;
}
.section-head h2 {
  font-size: clamp(26px, 3vw, 32px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
}
.section-head p {
  font-size: 15px;
  color: var(--text-muted);
  margin-top: 8px;
  font-weight: 400;
}
.link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  white-space: nowrap;
  transition: gap .3s ease;
}
.link-more:hover { gap: 11px; }
.link-more svg { width: 16px; height: 16px; }

/* ========== 核心业务混排网格 ========== */
.mixed-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.mixed-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border-card);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .3s ease, box-shadow .3s ease;
  display: flex;
  flex-direction: column;
  position: relative;
}
.mixed-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.mixed-card .card-img {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: #EAF2FA;
}
.mixed-card .card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .45s ease;
}
.mixed-card:hover .card-img img { transform: scale(1.035); }
.mixed-card .card-body {
  padding: 20px 22px 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.mixed-card .card-cat {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 3px 10px;
  border-radius: 999px;
  align-self: flex-start;
  margin-bottom: 10px;
}
.mixed-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.4;
}
.mixed-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}
.card-more {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.card-more svg { width: 15px; height: 15px; transition: transform .3s ease; }
.card-more:hover svg { transform: translateX(3px); }
.mixed-card.large { grid-column: span 2; }
.mixed-card.large .card-img { aspect-ratio: 21/9; }
.mixed-card.large h3 { font-size: 22px; }
.mixed-card.small { }
.mixed-card.half { grid-column: span 1; }
@media (max-width: 1023px) {
  .mixed-grid { grid-template-columns: repeat(2, 1fr); }
  .mixed-card.large { grid-column: span 2; }
}
@media (max-width: 640px) {
  .mixed-grid { grid-template-columns: 1fr; }
  .mixed-card.large { grid-column: span 1; }
  .mixed-card.large .card-img { aspect-ratio: 16/10; }
}

/* ========== 评价轮播 ========== */
.review-section { background: var(--bg-alt); }
.review-wrap {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  overflow: hidden;
}
.review-track {
  display: flex;
  transition: transform .5s ease;
}
.review-slide {
  min-width: 100%;
  padding: 8px;
}
.review-card {
  background: #fff;
  border-radius: 20px;
  padding: 38px 36px;
  box-shadow: var(--shadow);
  text-align: center;
}
.review-stars {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-bottom: 20px;
}
.review-stars svg { width: 20px; height: 20px; }
.review-stars .filled { color: #F5B840; fill: #F5B840; }
.review-stars .empty { color: #DCE8F2; fill: #DCE8F2; }
.review-text {
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-main);
  max-width: 600px;
  margin: 0 auto 24px;
}
.review-author { font-size: 15px; color: var(--text-sub); }
.review-author strong { display: block; font-size: 16px; color: var(--text-main); margin-bottom: 2px; }
.review-author span { font-size: 14px; color: var(--text-muted); }
.review-arrows {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 28px;
}
.review-arrow {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  transition: all .3s ease;
}
.review-arrow:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.review-arrow svg { width: 18px; height: 18px; }
.review-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}
.review-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #DCE8F2;
  transition: all .3s ease;
}
.review-dot.active {
  width: 18px;
  background: var(--primary);
}

/* ========== 保障条 ========== */
.guarantee-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.guarantee-item {
  text-align: center;
  padding: 10px;
}
.guarantee-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
  transition: background .3s ease;
}
.guarantee-icon svg {
  width: 24px;
  height: 24px;
  color: var(--primary);
  transition: color .3s ease;
}
.guarantee-item:hover .guarantee-icon {
  background: rgba(255,122,69,0.18);
}
.guarantee-item:hover .guarantee-icon svg { color: var(--accent); }
.guarantee-item h3 { font-size: 16px; font-weight: 600; color: var(--text-main); margin-bottom: 6px; }
.guarantee-item p { font-size: 13px; color: var(--text-muted); line-height: 1.5; }

/* ========== 最新资讯内容区 ========== */
.news-section { background: #fff; }
.news-layout {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr;
  gap: 40px;
}
.news-main-list { display: flex; flex-direction: column; gap: 0; }
.news-list-item {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(227,237,246,0.7);
  transition: background .25s ease;
}
.news-list-item:last-child { border-bottom: none; }
.news-list-item:hover { background: rgba(247,250,253,0.6); }
.news-list-thumb {
  width: 96px;
  height: 72px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  background: #EAF2FA;
  display: flex;
  align-items: center;
  justify-content: center;
}
.news-list-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.news-list-thumb svg {
  width: 24px;
  height: 24px;
  color: #B0C7DA;
}
.news-list-body { flex: 1; min-width: 0; }
.news-list-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 5px;
  font-size: 12px;
  color: var(--text-muted);
}
.news-list-cat {
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
}
.news-list-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
  transition: color .2s ease;
}
.news-list-item:hover .news-list-title { color: var(--primary); }
.news-list-summary {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.5;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-list-date {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  margin-top: 5px;
}
.news-side-list { display: flex; flex-direction: column; gap: 22px; }
.news-side-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-soft);
}
.news-side-item {
  display: flex;
  gap: 14px;
  align-items: center;
  border-radius: 12px;
  padding: 8px;
  transition: background .25s ease;
}
.news-side-item:hover { background: var(--bg); }
.news-side-img {
  width: 92px;
  height: 64px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  background: #EAF2FA;
  display: flex;
  align-items: center;
  justify-content: center;
}
.news-side-img img { width: 100%; height: 100%; object-fit: cover; }
.news-side-img svg { width: 20px; height: 20px; color: #B0C7DA; }
.news-side-body { min-width: 0; }
.news-side-item h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.45;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
  transition: color .2s ease;
}
.news-side-item:hover h4 { color: var(--primary); }
.news-side-item .side-time { font-size: 12px; color: var(--text-muted); }
.empty-state {
  width: 100%;
  padding: 60px 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 15px;
  background: var(--bg-alt);
  border-radius: var(--radius);
}
.empty-state svg {
  width: 40px;
  height: 40px;
  color: #B8C9D6;
  margin: 0 auto 12px;
  display: block;
}

/* ========== 品牌资质带 ========== */
.brand-strip {
  padding: 40px 0;
  background: #fff;
  border-top: 1px solid var(--border-card);
  border-bottom: 1px solid var(--border-card);
}
.brand-strip-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  opacity: 0.55;
  filter: grayscale(1);
  transition: all .4s ease;
}
.brand-strip-inner:hover {
  opacity: 1;
  filter: grayscale(0);
}
.brand-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
  letter-spacing: 1px;
  text-transform: uppercase;
}
.brand-item svg { width: 22px; height: 22px; }

/* ========== CTA ========== */
.cta-section { padding: 60px 0 90px; }
.cta-box {
  background: var(--primary);
  border-radius: var(--radius-xl);
  padding: 56px 60px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: '';
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  right: -80px;
  top: -100px;
}
.cta-box::after {
  content: '';
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  left: -40px;
  bottom: -60px;
}
.cta-left { position: relative; z-index: 1; }
.cta-left h2 {
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: 700;
  color: #fff;
  line-height: 1.35;
  margin-bottom: 14px;
}
.cta-left p {
  font-size: 16px;
  line-height: 1.7;
  color: rgba(255,255,255,0.85);
  max-width: 380px;
}
.cta-form-wrap {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 16px 40px rgba(0,0,0,0.12);
  position: relative;
  z-index: 1;
}
.cta-form-wrap label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}
.cta-form-wrap input {
  width: 100%;
  height: 46px;
  border: 1px solid #D6E4F0;
  border-radius: 10px;
  padding: 0 14px;
  font-size: 15px;
  color: var(--text-main);
  transition: border .2s ease, box-shadow .2s ease;
  margin-bottom: 14px;
}
.cta-form-wrap input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(30,111,217,0.12);
}
.cta-form-wrap .btn {
  width: 100%;
  height: 46px;
  font-size: 15px;
}

/* ========== FAQ ========== */
.faq-section { background: var(--bg); padding-bottom: 90px; }
.faq-list { max-width: 840px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: var(--radius);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color .3s ease, box-shadow .3s ease;
}
.faq-item.open {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30,111,217,0.05);
}
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 26px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  background: #fff;
  width: 100%;
  text-align: left;
}
.faq-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1.5px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 15px;
  font-weight: 700;
  flex-shrink: 0;
  transition: transform .3s ease, background .3s ease, color .3s ease;
}
.faq-item.open .faq-icon {
  transform: rotate(135deg);
  background: var(--primary);
  color: #fff;
}
.faq-a {
  display: none;
  padding: 0 26px 22px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-sub);
}
.faq-item.open .faq-a { display: block; }

/* ========== Footer ========== */
.site-footer {
  background: #0D1B33;
  color: rgba(255,255,255,0.7);
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .logo {
  margin-bottom: 14px;
}
.footer-brand .logo-text { color: #fff; }
.footer-brand .logo-icon {
  background: var(--primary);
}
.footer-brand-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.6);
  margin-bottom: 14px;
  max-width: 240px;
}
.footer-icp {
  font-size: 12px;
  color: rgba(255,255,255,0.35);
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: rgba(255,255,255,0.95);
  margin-bottom: 16px;
}
.footer-col ul li {
  margin-bottom: 8px;
}
.footer-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  transition: color .25s ease;
}
.footer-col ul li a:hover { color: #fff; }
.footer-contact p {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 12.5px;
  color: rgba(255,255,255,0.35);
}

/* ========== 响应式 ========== */
@media (max-width: 1023px) {
  .main-nav { gap: 18px; }
  .nav-link { font-size: 14.5px; }
  .trust-bar-inner { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr 0.9fr; gap: 36px; }
  .cta-box { grid-template-columns: 1fr 1fr; padding: 44px 40px; gap: 32px; }
  .news-layout { grid-template-columns: 1.4fr 1fr; gap: 28px; }
}
@media (max-width: 767px) {
  .main-nav, .btn-nav { display: none; }
  .menu-toggle { display: flex; }
  .hero { padding: 120px 0 70px; }
  .hero-inner { grid-template-columns: 1fr; gap: 36px; }
  .hero-title { font-size: 34px; }
  .trust-bar-inner { grid-template-columns: repeat(2, 1fr); }
  .guarantee-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .news-layout { grid-template-columns: 1fr; gap: 40px; }
  .cta-box { grid-template-columns: 1fr; padding: 36px 24px; gap: 30px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .review-card { padding: 28px 20px; }
  .section { padding: 56px 0; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .trust-bar { margin-top: -20px; }
}
@media (max-width: 520px) {
  .trust-bar-inner { grid-template-columns: 1fr; }
  .guarantee-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .cta-left p { font-size: 15px; }
  .logo-text { font-size: 18px; }
}

/* roulang page: category1 */
:root {
      --primary: #1E6FD9;
      --primary-dark: #155AB0;
      --primary-active: #104180;
      --primary-soft: #E8F1FC;
      --accent: #FF7A45;
      --bg: #F7FAFD;
      --text: #132A3D;
      --text-secondary: #526B7E;
      --text-muted: #8A9BA9;
      --border: #DCE8F2;
      --success: #23A574;
      --warning: #E6A23C;
      --radius: 16px;
      --radius-lg: 24px;
      --radius-banner: 36px;
      --shadow-sm: 0 6px 24px rgba(19,42,61,.06);
      --shadow-lg: 0 12px 32px rgba(19,42,61,.12);
      --font-sans: "PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

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

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

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

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

    ul,
    ol {
      list-style: none;
    }

    button,
    input {
      font-family: inherit;
      font-size: inherit;
      border: none;
      outline: none;
      background: none;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 1rem;
      padding-right: 1rem;
    }

    @media (min-width: 768px) {
      .container {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
      }
    }

    /* 按钮 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 48px;
      padding: 0 28px;
      border-radius: 12px;
      font-size: 16px;
      font-weight: 600;
      line-height: 1;
      cursor: pointer;
      transition: all .25s ease;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 4px 14px rgba(30, 111, 217, .25);
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      color: #fff;
      transform: translateY(-1px);
      box-shadow: 0 8px 20px rgba(30, 111, 217, .32);
    }

    .btn-primary:active {
      transform: translateY(0);
      background: var(--primary-active);
      box-shadow: 0 2px 8px rgba(30, 111, 217, .2);
    }

    .btn-outline {
      background: #fff;
      color: var(--primary);
      border: 1.5px solid var(--primary);
    }

    .btn-outline:hover {
      background: var(--primary-soft);
      color: var(--primary-dark);
      transform: translateY(-1px);
    }

    .btn-outline:active {
      transform: translateY(0);
      background: #dbe9fb;
    }

    .btn-sm {
      height: 42px;
      padding: 0 24px;
      font-size: 15px;
      border-radius: 12px;
    }

    .btn-accent {
      background: var(--accent);
      color: #2B1A12;
      box-shadow: 0 4px 14px rgba(255, 122, 69, .24);
    }

    .btn-accent:hover {
      background: #ff8f5e;
      color: #2B1A12;
      transform: translateY(-1px);
      box-shadow: 0 8px 20px rgba(255, 122, 69, .3);
    }

    /* 头部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, .95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid #eef3f7;
      transition: box-shadow .3s ease;
    }

    .site-header.scrolled {
      box-shadow: 0 6px 24px rgba(19, 42, 61, .06);
    }

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

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

    .logo-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 38px;
      height: 38px;
      background: var(--primary);
      color: #fff;
      font-size: 20px;
      font-weight: 800;
      border-radius: 12px;
      box-shadow: 0 4px 10px rgba(30, 111, 217, .28);
    }

    .logo-text {
      font-size: 22px;
      font-weight: 800;
      color: var(--text);
      letter-spacing: .5px;
    }

    .logo-text em {
      font-style: normal;
      color: var(--primary);
    }

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

    .nav-link {
      position: relative;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      line-height: 72px;
      transition: color .25s ease;
    }

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

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

    .nav-link.active::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 12px;
      height: 2px;
      border-radius: 2px;
      background: var(--primary);
    }

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

    .nav-toggle {
      display: none;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      border: 1px solid var(--border);
      background: #fff;
      gap: 5px;
      cursor: pointer;
    }

    .nav-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--text);
      border-radius: 2px;
      transition: transform .3s ease, opacity .3s ease;
    }

    .nav-toggle.open span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle.open span:nth-child(2) {
      opacity: 0;
    }

    .nav-toggle.open span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    .mobile-menu {
      display: none;
      background: #fff;
      border-top: 1px solid #eef3f7;
      box-shadow: 0 12px 32px rgba(19, 42, 61, .1);
    }

    .mobile-menu .mobile-nav {
      display: flex;
      flex-direction: column;
      padding: 12px 0;
    }

    .mobile-menu .mobile-link {
      padding: 14px 20px;
      font-size: 16px;
      font-weight: 500;
      color: var(--text);
      border-bottom: 1px solid #f1f5f9;
    }

    .mobile-menu .mobile-link:last-child {
      border-bottom: none;
    }

    .mobile-menu .mobile-link.active {
      color: var(--primary);
      background: var(--primary-soft);
    }

    .mobile-menu .mobile-cta {
      padding: 16px 20px 20px;
    }

    .mobile-menu .mobile-cta .btn {
      width: 100%;
    }

    @media (max-width: 1023px) {
      .main-nav {
        display: none;
      }

      .header-actions .btn {
        display: none;
      }

      .nav-toggle {
        display: flex;
      }

      .mobile-menu.open {
        display: block;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        z-index: 49;
        max-height: calc(100vh - 72px);
        overflow-y: auto;
      }
    }

    @media (min-width: 1024px) {
      .mobile-menu {
        display: none !important;
      }

      .header-actions .btn {
        display: inline-flex;
      }
    }

    /* 页面Hero */
    .page-hero {
      position: relative;
      background: linear-gradient(90deg, #f7fafd 0%, #eef4fb 60%, #e4eef8 100%);
      border-bottom: 1px solid var(--border);
      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: .35;
      z-index: 0;
    }

    .page-hero::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(110deg, rgba(255, 255, 255, .85) 30%, rgba(255, 255, 255, .4) 100%);
      z-index: 1;
    }

    .page-hero .container {
      position: relative;
      z-index: 2;
      padding-top: 72px;
      padding-bottom: 72px;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 20px;
    }

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

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

    .breadcrumb .sep {
      color: #b8c9d8;
    }

    .breadcrumb .current {
      color: var(--primary);
      font-weight: 600;
    }

    .page-hero h1 {
      font-size: clamp(32px, 4vw, 44px);
      font-weight: 800;
      line-height: 1.2;
      color: var(--text);
      margin-bottom: 16px;
      max-width: 760px;
    }

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

    .page-hero .hero-sub {
      font-size: 17px;
      line-height: 1.8;
      color: var(--text-secondary);
      max-width: 640px;
      margin-bottom: 28px;
    }

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

    /* 板块通用 */
    .section {
      padding: 64px 0;
    }

    @media (min-width: 768px) {
      .section {
        padding: 80px 0;
      }
    }

    .section-label {
      display: inline-flex;
      align-items: center;
      background: var(--primary-soft);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 14px;
      letter-spacing: .4px;
    }

    .section-title {
      font-size: clamp(24px, 3vw, 32px);
      font-weight: 700;
      line-height: 1.3;
      color: var(--text);
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-secondary);
      max-width: 720px;
      line-height: 1.75;
    }

    .section-head {
      margin-bottom: 40px;
    }

    @media (min-width: 768px) {
      .section-head {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        gap: 16px;
      }
    }

    /* 分类说明条 */
    .category-note {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 20px 24px;
      margin-top: -28px;
      position: relative;
      z-index: 3;
      box-shadow: var(--shadow-sm);
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.8;
    }

    .category-note strong {
      color: var(--primary);
    }

    /* 两列大图卡网格 */
    .hot-topic-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 24px;
    }

    @media (min-width: 768px) {
      .hot-topic-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    .topic-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform .3s ease, box-shadow .3s ease;
      display: flex;
      flex-direction: column;
    }

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

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

    .topic-card .card-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .45s ease;
    }

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

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

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

    .topic-card h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--text);
      line-height: 1.4;
      margin-bottom: 8px;
    }

    .topic-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 16px;
      flex: 1;
    }

    .topic-card .card-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 12px;
      color: var(--text-muted);
      border-top: 1px solid #f0f5f9;
      padding-top: 14px;
    }

    .topic-card .card-meta .dot {
      width: 3px;
      height: 3px;
      border-radius: 50%;
      background: #c3d4e3;
    }

    .topic-card .card-link {
      margin-left: auto;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: gap .25s ease;
    }

    .topic-card .card-link:hover {
      gap: 8px;
      color: var(--primary-dark);
    }

    /* 场景卡片 */
    .scene-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 20px;
    }

    @media (min-width: 768px) {
      .scene-grid {
        grid-template-columns: repeat(3, 1fr);
      }
    }

    .scene-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: box-shadow .3s ease, transform .3s ease;
    }

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

    .scene-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 56px;
      height: 56px;
      background: var(--primary-soft);
      border-radius: 16px;
      margin-bottom: 18px;
      transition: background .3s ease;
    }

    .scene-icon svg {
      width: 26px;
      height: 26px;
      color: var(--primary);
      transition: color .3s ease;
    }

    .scene-card:hover .scene-icon {
      background: rgba(255, 122, 69, .18);
    }

    .scene-card:hover .scene-icon svg {
      color: var(--accent);
    }

    .scene-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 8px;
    }

    .scene-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    /* 流程步骤 */
    .steps-wrap {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
    }

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

    @media (min-width: 768px) {
      .steps-grid {
        grid-template-columns: repeat(4, 1fr);
      }
    }

    .step-item {
      position: relative;
      padding-top: 12px;
    }

    .step-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary-soft);
      line-height: 1;
      margin-bottom: 12px;
    }

    .step-item h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 6px;
    }

    .step-item p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    .step-arrow {
      display: none;
    }

    @media (min-width: 768px) {
      .step-arrow {
        display: flex;
        align-items: center;
        position: absolute;
        right: -10px;
        top: 28px;
        color: #c6d7e8;
      }
    }

    /* FAQ */
    .faq-wrap {
      max-width: 860px;
    }

    .faq-item {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: 14px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: border-color .3s ease, box-shadow .3s ease;
    }

    .faq-item.open {
      border-color: var(--primary);
      box-shadow: 0 4px 16px rgba(30, 111, 217, .1);
    }

    .faq-q {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 20px;
      cursor: pointer;
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      line-height: 1.5;
      transition: color .2s ease;
    }

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

    .faq-icon {
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: var(--primary-soft);
      color: var(--primary);
      font-size: 18px;
      font-weight: 700;
      transition: transform .3s ease, background .3s ease;
    }

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

    .faq-a {
      display: none;
      padding: 0 20px 20px;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.8;
      border-top: 1px solid #f0f5f9;
      margin-top: -6px;
      padding-top: 14px;
    }

    .faq-item.open .faq-a {
      display: block;
      animation: fadeIn .3s ease;
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(-4px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    /* 分类页CTA条 */
    .category-cta {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: 20px;
      padding: 32px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 20px;
      align-items: flex-start;
    }

    @media (min-width: 768px) {
      .category-cta {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        padding: 36px 40px;
      }
    }

    .category-cta h3 {
      font-size: 22px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 6px;
    }

    .category-cta p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    /* 页脚 */
    .site-footer {
      background: #0D1B33;
      color: rgba(255, 255, 255, .7);
      padding: 64px 0 24px;
      font-size: 14px;
    }

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

    @media (min-width: 768px) {
      .footer-grid {
        grid-template-columns: 1.2fr 1fr 1fr 1.2fr;
        gap: 40px;
      }
    }

    .footer-brand .logo {
      margin-bottom: 16px;
    }

    .footer-brand .logo-icon {
      background: rgba(255, 255, 255, .12);
      color: #fff;
      box-shadow: none;
      border: 1px solid rgba(255, 255, 255, .16);
    }

    .footer-brand .logo-text {
      color: #fff;
    }

    .footer-brand .logo-text em {
      color: #8ec3ff;
    }

    .footer-brand-desc {
      margin: 16px 0 20px;
      line-height: 1.8;
      color: rgba(255, 255, 255, .65);
      max-width: 320px;
    }

    .footer-icp {
      font-size: 12px;
      color: rgba(255, 255, 255, .35);
      border-top: 1px solid rgba(255, 255, 255, .08);
      padding-top: 16px;
      max-width: 280px;
    }

    .footer-col h4 {
      color: #fff;
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 16px;
    }

    .footer-col ul li {
      margin-bottom: 8px;
    }

    .footer-col ul a {
      color: rgba(255, 255, 255, .65);
      transition: color .25s ease;
    }

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

    .footer-contact p {
      line-height: 2;
      color: rgba(255, 255, 255, .6);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, .08);
      padding-top: 24px;
      text-align: center;
      font-size: 12px;
      color: rgba(255, 255, 255, .4);
    }

    /* 焦点可见性 */
    a:focus-visible,
    button:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
      border-radius: 4px;
    }

    /* 图像占位背景 */
    .img-placeholder {
      background: linear-gradient(135deg, #eaf2fa, #dbe7f3);
      min-height: 200px;
    }

/* roulang page: article */
:root {
            --primary: #1E6FD9;
            --primary-hover: #155AB0;
            --primary-active: #104180;
            --primary-soft: #E8F1FC;
            --accent: #FF7A45;
            --accent-soft: #FFF1EB;
            --bg: #F7FAFD;
            --surface-blue: #F2F7FC;
            --text-main: #132A3D;
            --text-secondary: #526B7E;
            --text-muted: #8A9BA9;
            --border: #DCE8F2;
            --border-light: #E3EDF6;
            --white: #ffffff;
            --footer-bg: #0D1B33;
            --shadow-default: 0 6px 24px rgba(19, 42, 61, 0.06);
            --shadow-hover: 0 12px 32px rgba(19, 42, 61, 0.12);
            --ff: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--ff);
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        ul,
        ol {
            list-style: none;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input,
        textarea {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-default);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), #3D8BEA);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 2px 8px rgba(30, 111, 217, 0.3);
        }
        .logo-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo-text em {
            font-style: normal;
            color: var(--primary);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-soft);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-btn, 12px);
            font-size: 15px;
            font-weight: 600;
            padding: 12px 26px;
            transition: all 0.25s ease;
            border: 1px solid transparent;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 12px rgba(30, 111, 217, 0.25);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(30, 111, 217, 0.3);
        }
        .btn-primary:active {
            background: var(--primary-active);
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-soft);
            color: var(--primary-hover);
        }
        .btn-accent {
            background: var(--accent);
            color: #2B1A12;
            box-shadow: 0 2px 12px rgba(255, 122, 69, 0.3);
        }
        .btn-accent:hover {
            background: #FF6B2F;
            transform: translateY(-1px);
        }
        .btn-sm {
            height: 40px;
            padding: 0 22px;
            font-size: 14px;
        }
        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            background: var(--primary-soft);
        }
        .nav-toggle span {
            display: block;
            width: 18px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-default);
            padding: 16px 24px 24px;
            z-index: 99;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link {
            display: block;
            padding: 12px 12px;
            border-radius: 10px;
            font-size: 16px;
        }
        .mobile-menu .btn {
            margin-top: 12px;
            width: 100%;
        }
        @media (max-width: 992px) {
            .main-nav {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
        }
        @media (max-width: 480px) {
            .logo-text {
                font-size: 18px;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 17px;
            }
        }
        .breadcrumb-wrap {
            padding: 20px 0 0;
            background: var(--bg);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: #C4D2DE;
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 300px;
        }
        .article-container {
            padding-top: 24px;
            padding-bottom: 60px;
        }
        .article-main-card {
            background: #fff;
            border-radius: 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-default);
            padding: 48px;
            max-width: 860px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .article-main-card {
                padding: 24px 20px;
                border-radius: 16px;
            }
        }
        .article-header {
            margin-bottom: 32px;
        }
        .article-badge {
            display: inline-block;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
        }
        .article-header h1 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .meta-dot {
            color: #C4D2DE;
        }
        .article-summary {
            background: var(--surface-blue);
            border-radius: 12px;
            padding: 16px 20px;
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-secondary);
            border-left: 4px solid var(--primary);
        }
        .article-content {
            max-width: 760px;
            margin: 0 auto;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-secondary);
        }
        .article-content p {
            margin-bottom: 1.5em;
        }
        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            margin: 36px 0 16px;
            padding-left: 14px;
            border-left: 4px solid var(--primary);
            line-height: 1.3;
        }
        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
            margin: 28px 0 12px;
        }
        .article-content h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin: 24px 0 10px;
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 1.5em 1.2em;
        }
        .article-content ul li {
            list-style: disc;
            margin-bottom: 6px;
        }
        .article-content ol li {
            list-style: decimal;
            margin-bottom: 6px;
        }
        .article-content img {
            border-radius: 12px;
            margin: 24px 0;
            width: auto;
            max-width: 100%;
        }
        .article-content blockquote {
            border-left: 4px solid var(--border);
            padding: 12px 20px;
            margin: 24px 0;
            color: #5A7A96;
            background: var(--surface-blue);
            border-radius: 0 12px 12px 0;
            font-size: 15px;
            line-height: 1.7;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
        }
        .article-content table th {
            background: var(--primary-soft);
            color: var(--text-main);
            font-weight: 600;
            padding: 10px 14px;
            border: 1px solid var(--border);
            text-align: left;
        }
        .article-content table td {
            padding: 10px 14px;
            border: 1px solid var(--border);
        }
        .article-content pre {
            background: #1E2A36;
            color: #E8EDF2;
            border-radius: 12px;
            padding: 16px 20px;
            overflow-x: auto;
            margin: 24px 0;
            line-height: 1.6;
            font-size: 14px;
        }
        .article-content code {
            font-family: "SFMono-Regular", Consolas, monospace;
        }
        .article-content a {
            color: var(--primary);
            border-bottom: 1px solid rgba(30, 111, 217, 0.3);
        }
        .article-content a:hover {
            color: var(--primary-hover);
            border-bottom-color: var(--primary);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-tags .tag {
            display: inline-flex;
            align-items: center;
            background: var(--surface-blue);
            color: var(--text-secondary);
            font-size: 13px;
            padding: 5px 14px;
            border-radius: 999px;
            transition: all 0.2s;
        }
        .article-tags .tag:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }
        .article-pager {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 36px;
        }
        @media (max-width: 640px) {
            .article-pager {
                grid-template-columns: 1fr;
            }
        }
        .pager-card {
            border: 1px solid var(--border-light);
            border-radius: 12px;
            padding: 16px 20px;
            transition: all 0.2s ease;
            background: #fff;
        }
        .pager-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-default);
        }
        .pager-label {
            display: block;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 6px;
            letter-spacing: 1px;
        }
        .pager-card a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            display: block;
        }
        .pager-card a:hover {
            color: var(--primary);
        }
        .related-posts {
            max-width: 860px;
            margin: 48px auto 0;
        }
        .related-posts h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 20px;
            position: relative;
            padding-left: 14px;
        }
        .related-posts h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 20px;
            background: var(--primary);
            border-radius: 2px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        @media (max-width: 768px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }
        .related-card {
            background: #fff;
            border-radius: 16px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all 0.25s ease;
            display: block;
        }
        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .related-card img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            transition: transform 0.35s ease;
        }
        .related-card:hover img {
            transform: scale(1.03);
        }
        .related-card-body {
            padding: 16px 18px;
        }
        .related-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            margin-bottom: 6px;
        }
        .related-date {
            font-size: 13px;
            color: var(--text-muted);
        }
        .article-cta {
            max-width: 860px;
            margin: 40px auto 0;
            background: var(--surface-blue);
            border-radius: 16px;
            padding: 32px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .article-cta h2 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
        }
        .article-cta p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 4px;
        }
        @media (max-width: 640px) {
            .article-cta {
                padding: 24px 20px;
                flex-direction: column;
                align-items: flex-start;
            }
        }
        .article-not-found {
            max-width: 620px;
            margin: 60px auto;
            background: #fff;
            border-radius: 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-default);
            padding: 64px 40px;
            text-align: center;
        }
        .not-found-icon {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 32px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
        }
        .article-not-found h1 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 24px;
        }
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
        }
        .site-footer a {
            color: rgba(255, 255, 255, 0.7);
            transition: color 0.2s;
        }
        .site-footer a:hover {
            color: #fff;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 560px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-brand .logo {
            margin-bottom: 12px;
        }
        .footer-brand .logo-text {
            color: #fff;
        }
        .footer-brand .logo-text em {
            color: #6FA8E8;
        }
        .footer-brand-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 16px;
            max-width: 340px;
        }
        .footer-icp {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
        }
        .footer-contact p {
            font-size: 14px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom {
            padding: 20px 0;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
            text-align: center;
        }
        @media (max-width: 768px) {
            .footer-grid {
                gap: 24px;
            }
        }

/* roulang page: category2 */
:root {
  --primary: #1E6FD9;
  --primary-dark: #155AB0;
  --primary-deep: #104180;
  --primary-soft: #E8F1FC;
  --accent: #FF7A45;
  --accent-text: #2B1A12;
  --bg-body: #F7FAFD;
  --bg-block: #FFFFFF;
  --bg-soft: #F2F7FC;
  --text-main: #132A3D;
  --text-secondary: #526B7E;
  --text-muted: #8A9BA9;
  --border: #DCE8F2;
  --navy: #0D1B33;
  --radius-sm: 10px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 36px;
  --shadow-card: 0 6px 24px rgba(19,42,61,0.06);
  --shadow-hover: 0 12px 32px rgba(19,42,61,0.12);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a { text-decoration: none; color: inherit; transition: color .25s ease; }

ul, ol { list-style: none; }

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

input, textarea { font-family: inherit; outline: none; }

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #EAF1F7;
  transition: box-shadow .3s ease;
}

.site-header.scrolled {
  box-shadow: 0 6px 24px rgba(19,42,61,.06);
}

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

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

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(30,111,217,.3);
}

.logo-text {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: .5px;
  white-space: nowrap;
}

.logo-text em {
  font-style: normal;
  color: var(--primary);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0 auto;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 10px;
  color: var(--text-secondary);
  position: relative;
  transition: all .25s ease;
}

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

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

.nav-link.active::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all .3s ease;
  padding: 0 26px;
  height: 44px;
  font-size: 15px;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(30,111,217,.25);
  color: #fff;
}

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

.btn-header {
  height: 42px;
  padding: 0 22px;
  font-size: 14px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all .3s ease;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: #fff;
  padding: 24px;
  flex-direction: column;
  gap: 8px;
  z-index: 99;
  overflow-y: auto;
}

.mobile-menu.show { display: flex; }

.mobile-link {
  display: block;
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 500;
  border-radius: 12px;
  color: var(--text-main);
  background: var(--bg-body);
}

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

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

.btn-mobile-cta {
  margin-top: 16px;
  width: 100%;
  height: 48px;
}

/* Page Hero / 分类标题区 */
.page-hero {
  position: relative;
  background-image: linear-gradient(to right, rgba(255,255,255,.95), rgba(255,255,255,.82)), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  padding: 64px 0 48px;
  border-bottom: 1px solid #EAF1F7;
}

.breadcrumb {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .current { color: var(--primary); font-weight: 500; }
.breadcrumb i { font-size: 12px; color: #BCCBD6; }

.page-hero h1 {
  font-size: clamp(32px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 14px;
}

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

.page-desc {
  max-width: 720px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
}

/* Category Layout */
.category-wrap {
  display: flex;
  gap: 32px;
  padding: 48px 24px;
  align-items: flex-start;
}

.cat-sidebar {
  width: 220px;
  flex-shrink: 0;
  position: sticky;
  top: 96px;
}

.cat-sidebar-inner {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.cat-sidebar h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  padding-bottom: 14px;
  border-bottom: 1px solid #EAF1F7;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cat-sidebar h3 i { color: var(--primary); }

.cat-sidebar ul li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all .25s ease;
}

.cat-sidebar ul li a i {
  font-size: 12px;
  opacity: 0;
  transform: translateX(-4px);
  transition: all .25s ease;
}

.cat-sidebar ul li a:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.cat-sidebar ul li a:hover i {
  opacity: 1;
  transform: translateX(0);
}

.cat-content {
  flex: 1;
  min-width: 0;
}

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

.cat-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all .3s ease;
  display: flex;
  flex-direction: column;
}

.cat-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: #C9DAE9;
}

.cat-card-img {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: #EAF2FA;
  position: relative;
}

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

.cat-card:hover .cat-card-img img {
  transform: scale(1.04);
}

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

.cat-card-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12px;
  font-weight: 500;
  align-self: flex-start;
  margin-bottom: 10px;
}

.cat-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.4;
}

.cat-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

.cat-card-footer {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid #F0F5FA;
}

.cat-card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap .25s ease;
}

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

/* Features */
.features-section {
  background: #fff;
  padding: 64px 0;
}

.section-head {
  text-align: center;
  margin-bottom: 48px;
}

.section-head .section-tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: clamp(26px, 3vw, 32px);
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 10px;
}

.section-head p {
  max-width: 600px;
  margin: 0 auto;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.feature-item {
  background: var(--bg-body);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  text-align: center;
  transition: all .3s ease;
}

.feature-item:hover {
  background: #fff;
  box-shadow: var(--shadow-card);
  transform: translateY(-3px);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: var(--primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--primary);
  font-size: 22px;
  transition: all .3s ease;
}

.feature-item:hover .feature-icon {
  background: rgba(255,122,69,.16);
  color: var(--accent);
}

.feature-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}

.feature-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Scenarios */
.scenario-section {
  background: var(--bg-soft);
  padding: 64px 0;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.scenario-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  transition: all .3s ease;
}

.scenario-card:hover {
  box-shadow: var(--shadow-hover);
}

.scenario-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.scenario-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 12px;
}

.scenario-card ul li {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  padding-left: 18px;
  position: relative;
  margin-bottom: 6px;
}

.scenario-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--primary);
  opacity: .35;
}

/* Steps */
.steps-section {
  background: #fff;
  padding: 64px 0;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  counter-reset: step;
}

.step-item {
  position: relative;
  background: var(--bg-body);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  counter-increment: step;
  transition: all .3s ease;
}

.step-item:hover {
  background: #fff;
  box-shadow: var(--shadow-card);
}

.step-num {
  font-size: 40px;
  font-weight: 800;
  color: var(--primary-soft);
  line-height: 1;
  margin-bottom: 14px;
  display: block;
}

.step-item:hover .step-num { color: var(--primary); }

.step-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

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

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

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color .3s ease, box-shadow .3s ease;
}

.faq-item.active {
  border-color: var(--primary);
  box-shadow: 0 4px 16px rgba(30,111,217,.08);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 22px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  transition: background .25s ease;
}

.faq-q:hover { background: var(--bg-body); }

.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  transition: transform .3s ease, background .3s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(135deg);
  background: var(--primary);
  color: #fff;
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}

.faq-a-inner {
  padding: 0 22px 20px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  border-top: 1px solid #F0F5FA;
  padding-top: 16px;
}

/* CTA Bar */
.cta-bar-section {
  padding: 40px 0 64px;
}

.cta-bar {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.cta-bar h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.cta-bar p {
  font-size: 14px;
  color: var(--text-secondary);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  color: var(--primary);
  border: 1.5px solid var(--primary);
  font-weight: 600;
  border-radius: var(--radius-md);
  padding: 0 26px;
  height: 44px;
  font-size: 15px;
  transition: all .3s ease;
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(30,111,217,.2);
}

/* Footer */
.site-footer {
  background: var(--navy);
  color: rgba(255,255,255,.7);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand .logo-text {
  color: #fff;
}

.footer-brand .logo-text em { color: #fff; }

.footer-brand .logo-icon {
  background: #fff;
  color: var(--primary);
}

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,.55);
  margin-bottom: 16px;
  max-width: 300px;
}

.footer-icp {
  font-size: 12px;
  color: rgba(255,255,255,.35);
  background: rgba(255,255,255,.06);
  display: inline-block;
  padding: 4px 12px;
  border-radius: 6px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,.55);
  transition: color .25s ease;
}

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

.footer-contact p {
  font-size: 14px;
  line-height: 2;
  color: rgba(255,255,255,.55);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,.35);
}

/* Responsive */
@media (max-width: 1024px) {
  .container { padding: 0 20px; }
  
  .main-nav .nav-link { padding: 8px 10px; font-size: 14px; }
  
  .logo-text { font-size: 20px; }
  
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .category-wrap { flex-direction: column; }
  
  .cat-sidebar {
    width: 100%;
    position: static;
    margin-bottom: 8px;
  }
  
  .cat-sidebar-inner {
    padding: 16px;
    overflow-x: auto;
  }
  
  .cat-sidebar h3 {
    margin-bottom: 10px;
  }
  
  .cat-sidebar ul {
    display: flex;
    gap: 8px;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 4px;
  }
  
  .cat-sidebar ul li { flex-shrink: 0; }
  
  .cat-sidebar ul li a {
    white-space: nowrap;
    padding: 8px 14px;
    background: var(--bg-body);
    border-radius: 999px;
    border: 1px solid var(--border);
  }
  
  .cat-sidebar ul li a i { display: none; }
  
  .scenario-grid { grid-template-columns: 1fr; }
  
  .steps-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .desktop-nav { display: none; }
  
  .nav-toggle { display: flex; }
  
  .header-actions .btn-header { display: none; }
  
  .page-hero { padding: 48px 0 36px; }
  
  .page-hero h1 { font-size: clamp(28px, 5vw, 34px); }
  
  .cat-grid { grid-template-columns: 1fr; }
  
  .features-grid { grid-template-columns: 1fr; }
  
  .footer-grid { grid-template-columns: 1fr 1fr; }
  
  .cta-bar { flex-direction: column; text-align: center; }
  
  .cta-bar .btn-outline { width: 100%; max-width: 280px; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  
  .logo-text { font-size: 18px; }
  
  .logo-icon { width: 34px; height: 34px; font-size: 17px; }
  
  .header-inner { height: 64px; }
  
  .mobile-menu { top: 64px; }
  
  .footer-grid { grid-template-columns: 1fr; }
  
  .cat-card-body { padding: 16px; }
}

/* roulang page: category3 */
:root {
  --primary: #1E6FD9;
  --primary-hover: #155AB0;
  --primary-active: #104180;
  --primary-soft: #E8F1FC;
  --accent: #FF7A45;
  --accent-deep: #F5621F;
  --accent-text: #2B1A12;
  --bg: #F7FAFD;
  --bg-alt: #FFFFFF;
  --bg-soft: #F2F7FC;
  --text: #132A3D;
  --text-secondary: #526B7E;
  --text-muted: #8A9BA9;
  --border: #DCE8F2;
  --border-card: #E3EDF6;
  --success: #23A574;
  --warning: #E6A23C;
  --footer-bg: #0D1B33;
  --radius: 16px;
  --radius-lg: 36px;
  --radius-btn: 12px;
  --radius-input: 10px;
  --shadow: 0 6px 24px rgba(19,42,61,0.06);
  --shadow-hover: 0 12px 32px rgba(19,42,61,0.12);
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 600; border-radius: var(--radius-btn);
  padding: 12px 26px; transition: all .3s ease; white-space: nowrap;
  min-height: 44px; letter-spacing: .02em;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-hover); }
.btn-primary:active { background: var(--primary-active); transform: translateY(0); }
.btn-outline { background: #fff; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-outline:hover { background: var(--primary-soft); transform: translateY(-1px); }
.btn-accent { background: var(--accent); color: var(--accent-text); }
.btn-accent:hover { background: var(--accent-deep); transform: translateY(-1px); box-shadow: var(--shadow-hover); }
.btn-lg { min-height: 50px; padding: 14px 34px; font-size: 17px; }
.badge {
  display: inline-flex; align-items: center; background: var(--primary-soft);
  color: var(--primary); font-size: 13px; font-weight: 500;
  padding: 4px 12px; border-radius: 999px; line-height: 1.4;
}
.section { padding: 72px 0; }
.section-alt { background: var(--bg-soft); }
.section-head { margin-bottom: 40px; }
.section-head .section-eyebrow {
  display: inline-block; font-size: 14px; font-weight: 600; color: var(--primary);
  letter-spacing: .08em; margin-bottom: 8px;
}
.section-head h2 {
  font-size: clamp(26px, 3vw, 32px); font-weight: 700; line-height: 1.3;
  color: var(--text); margin-bottom: 12px;
}
.section-head p { font-size: 16px; color: var(--text-secondary); max-width: 640px; line-height: 1.75; }
/* Header */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 72px; background: rgba(255,255,255,.95); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-card);
  transition: box-shadow .3s ease;
}
.site-header.scrolled { box-shadow: var(--shadow); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon {
  width: 38px; height: 38px; border-radius: 12px; background: var(--primary);
  color: #fff; font-size: 20px; font-weight: 800; display: flex;
  align-items: center; justify-content: center; flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(30,111,217,.28);
}
.logo-text { font-size: 22px; font-weight: 800; color: var(--text); letter-spacing: .01em; }
.logo-text em { font-style: normal; color: var(--primary); }
.main-nav { display: flex; align-items: center; gap: 6px; }
.nav-link {
  font-size: 15px; font-weight: 500; color: var(--text-secondary);
  padding: 7px 15px; border-radius: 10px; transition: color .25s ease, background .25s ease;
  position: relative;
}
.nav-link:hover { color: var(--primary); background: var(--primary-soft); }
.nav-link.active { color: var(--primary); font-weight: 600; background: var(--primary-soft); }
.nav-link.active::after {
  content: ''; position: absolute; left: 15px; right: 15px; bottom: 0;
  height: 2px; background: var(--primary); border-radius: 2px;
}
.header-cta { margin-left: 10px; min-height: 42px; padding: 0 24px; font-size: 15px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 10px; border-radius: 10px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all .3s ease; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-cta-mobile { display: none; }
/* Page Hero */
.page-hero {
  position: relative; padding: 136px 0 64px; margin-top: 72px;
  background: linear-gradient(rgba(255,255,255,.88), rgba(255,255,255,.92)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-bottom: 1px solid var(--border-card);
}
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-muted); margin-bottom: 20px; flex-wrap: wrap; }
.breadcrumb a { color: var(--text-secondary); transition: color .2s; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--primary); font-weight: 500; }
.page-hero h1 {
  font-size: clamp(32px, 4vw, 44px); font-weight: 800; line-height: 1.2;
  color: var(--text); margin-bottom: 18px; max-width: 780px;
}
.page-hero h1 em { font-style: normal; color: var(--primary); }
.page-hero-desc { font-size: 17px; line-height: 1.8; color: var(--text-secondary); max-width: 720px; }
/* Guide List */
.guide-list { display: flex; flex-direction: column; gap: 14px; }
.guide-list-item {
  display: flex; align-items: center; gap: 20px;
  background: var(--bg-alt); border: 1px solid var(--border-card);
  border-radius: var(--radius); padding: 16px;
  transition: box-shadow .3s ease, transform .3s ease, border-color .3s ease;
}
.guide-list-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); border-color: var(--primary); }
.guide-list-thumb {
  width: 128px; height: 96px; border-radius: 8px; object-fit: cover; flex-shrink: 0;
  background: var(--primary-soft);
}
.guide-list-body { flex: 1; min-width: 0; }
.guide-list-title { font-size: 17px; font-weight: 600; color: var(--text); margin-bottom: 4px; line-height: 1.4; }
.guide-list-summary { font-size: 14px; color: var(--text-secondary); line-height: 1.5; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }
.guide-list-meta { display: flex; align-items: center; gap: 12px; margin-top: 8px; font-size: 13px; color: var(--text-muted); }
.guide-list-meta .badge { font-size: 12px; padding: 2px 10px; }
.guide-arrow {
  width: 28px; height: 28px; border-radius: 8px; background: var(--primary-soft);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); font-size: 15px; transition: all .3s ease; margin-left: auto; flex-shrink: 0;
}
.guide-list-item:hover .guide-arrow { background: var(--primary); color: #fff; transform: translateX(2px); }
/* Steps */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step-card {
  background: var(--bg-alt); border-radius: var(--radius); padding: 28px 24px;
  border: 1px solid var(--border-card); position: relative;
  transition: box-shadow .3s ease, transform .3s ease;
}
.step-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.step-num {
  width: 44px; height: 44px; border-radius: 14px; background: var(--primary-soft);
  color: var(--primary); font-size: 20px; font-weight: 800;
  display: flex; align-items: center; justify-content: center; margin-bottom: 16px;
}
.step-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.step-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.65; }
/* Scene Cards */
.scene-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.scene-card {
  background: var(--bg-alt); border: 1px solid var(--border-card);
  border-radius: var(--radius); padding: 26px 22px;
  transition: box-shadow .3s ease, transform .3s ease;
}
.scene-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.scene-icon {
  width: 52px; height: 52px; border-radius: 16px; background: var(--primary-soft);
  display: flex; align-items: center; justify-content: center; margin-bottom: 16px;
  transition: background .3s ease;
}
.scene-icon svg { width: 24px; height: 24px; color: var(--primary); transition: color .3s ease; }
.scene-card:hover .scene-icon { background: rgba(255,122,69,.18); }
.scene-card:hover .scene-icon svg { color: var(--accent); }
.scene-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.scene-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.65; }
/* FAQ */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--bg-alt); border: 1px solid var(--border-card);
  border-radius: var(--radius); margin-bottom: 12px; overflow: hidden;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.faq-item.active { border-color: var(--primary); box-shadow: 0 4px 16px rgba(30,111,217,.1); }
.faq-question {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 20px 24px; font-size: 16px; font-weight: 600; color: var(--text);
  cursor: pointer; transition: color .25s;
}
.faq-question:hover { color: var(--primary); }
.faq-icon {
  width: 24px; height: 24px; border-radius: 8px; background: var(--primary-soft);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); font-size: 16px; font-weight: 700; flex-shrink: 0;
  transition: all .3s ease;
}
.faq-item.active .faq-icon { background: var(--primary); color: #fff; transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-item.active .faq-answer { max-height: 300px; }
.faq-answer-inner { padding: 0 24px 20px; font-size: 15px; color: var(--text-secondary); line-height: 1.8; }
/* CTA Bar */
.cta-bar {
  background: var(--bg-soft); border: 1px solid var(--border-card);
  border-radius: var(--radius); padding: 32px 40px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  flex-wrap: wrap;
}
.cta-bar h3 { font-size: 22px; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.cta-bar p { font-size: 15px; color: var(--text-secondary); }
/* Footer */
.site-footer { background: var(--footer-bg); color: rgba(255,255,255,.7); padding: 60px 0 24px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-brand .logo-text { color: #fff; }
.footer-brand .logo-text em { color: #5DA0E8; }
.footer-brand-desc { margin-top: 14px; font-size: 14px; line-height: 1.7; color: rgba(255,255,255,.55); max-width: 280px; }
.footer-icp { margin-top: 16px; font-size: 12px; color: rgba(255,255,255,.35); }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 4px; }
.footer-col a { font-size: 14px; color: rgba(255,255,255,.6); transition: color .2s; line-height: 2.2; }
.footer-col a:hover { color: #fff; }
.footer-contact p { font-size: 14px; line-height: 1.9; color: rgba(255,255,255,.55); }
.footer-bottom { padding-top: 24px; text-align: center; font-size: 12px; color: rgba(255,255,255,.35); }
/* Responsive */
@media (max-width: 1023px) {
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .scene-grid { grid-template-columns: repeat(2, 1fr); }
  .header-cta { padding: 0 18px; font-size: 14px; }
  .nav-link { padding: 6px 10px; font-size: 14px; }
}
@media (max-width: 767px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .section { padding: 48px 0; }
  .nav-toggle { display: flex; }
  .header-cta { display: none; }
  .main-nav {
    position: fixed; top: 72px; left: 0; right: 0;
    background: #fff; flex-direction: column; align-items: stretch;
    padding: 16px 16px 24px; box-shadow: var(--shadow);
    transform: translateY(-130%); transition: transform .35s ease;
    border-bottom: 1px solid var(--border-card); z-index: 99;
    max-height: calc(100vh - 80px); overflow-y: auto;
  }
  .main-nav.open { transform: translateY(0); }
  .nav-link { padding: 13px 16px; border-radius: 12px; font-size: 16px; }
  .nav-link.active::after { display: none; }
  .nav-cta-mobile { display: flex; margin-top: 16px; width: 100%; justify-content: center; }
  .page-hero { padding: 110px 0 40px; }
  .page-hero h1 { font-size: 30px; }
  .page-hero-desc { font-size: 15px; }
  .guide-list-item { flex-direction: row; gap: 12px; padding: 12px; }
  .guide-list-thumb { width: 92px; height: 72px; }
  .guide-list-summary { font-size: 13px; }
  .guide-list-title { font-size: 15px; }
  .guide-list-meta { flex-wrap: wrap; gap: 8px; }
  .steps-grid, .scene-grid { grid-template-columns: 1fr; }
  .cta-bar { flex-direction: column; align-items: stretch; text-align: center; padding: 24px 20px; }
  .cta-bar .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .logo-text { font-size: 18px; }
  .logo-icon { width: 32px; height: 32px; font-size: 17px; }
}

/* roulang page: category4 */
:root {
            --primary: #1E6FD9;
            --primary-hover: #155AB0;
            --primary-active: #104180;
            --primary-soft: #E8F1FC;
            --accent: #FF7A45;
            --accent-dark: #2B1A12;
            --accent-soft: rgba(255, 122, 69, 0.12);
            --bg-main: #F7FAFD;
            --bg-alt: #F2F7FC;
            --text-main: #132A3D;
            --text-secondary: #526B7E;
            --text-muted: #8A9BA9;
            --border: #DCE8F2;
            --border-card: #E3EDF6;
            --success: #23A574;
            --warning: #E6A23C;
            --footer-bg: #0D1B33;
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 36px;
            --shadow-sm: 0 6px 24px rgba(19, 42, 61, 0.06);
            --shadow-md: 0 12px 32px rgba(19, 42, 61, 0.12);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
            --header-h: 72px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-main);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input,
        textarea {
            font-family: inherit;
            outline: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 16px;
            padding-right: 16px;
        }
        @media (min-width: 768px) {
            .container {
                padding-left: 24px;
                padding-right: 24px;
            }
        }
        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
        }
        .section-head .section-label {
            display: inline-block;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
            letter-spacing: .5px;
        }
        .section-head h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .section-head p {
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.7;
        }
        @media (max-width: 640px) {
            .section-head h2 {
                font-size: 24px;
            }
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 0 26px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            transition: all 0.3s ease;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff !important;
            box-shadow: 0 4px 14px rgba(30, 111, 217, 0.2);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(30, 111, 217, 0.28);
        }
        .btn-primary:active {
            transform: translateY(0);
            background: var(--primary-active);
        }
        .btn-ghost {
            background: #fff;
            color: var(--primary) !important;
            border: 1px solid var(--primary);
        }
        .btn-ghost:hover {
            background: var(--primary-soft);
            transform: translateY(-1px);
        }
        .btn-accent {
            background: var(--accent);
            color: var(--accent-dark) !important;
            box-shadow: 0 4px 14px rgba(255, 122, 69, 0.22);
        }
        .btn-accent:hover {
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(255, 122, 69, 0.32);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            line-height: 1.4;
        }
        .card {
            background: #fff;
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(220, 232, 242, 0.7);
            transition: box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 6px 24px rgba(19, 42, 61, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), #4d94e8);
            color: #fff;
            font-size: 17px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: 0;
            white-space: nowrap;
        }
        .logo-text em {
            font-style: normal;
            color: var(--primary);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 14px;
            border-radius: 8px;
            position: relative;
            transition: color 0.25s ease, background 0.25s ease;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-soft);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .header-cta {
            flex-shrink: 0;
            min-height: 42px;
            padding: 0 24px;
            font-size: 14px;
        }
        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text-main);
            flex-shrink: 0;
        }
        .menu-toggle svg {
            width: 22px;
            height: 22px;
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            z-index: 999;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 16px 40px rgba(19, 42, 61, 0.1);
            padding: 16px;
            max-height: calc(100vh - var(--header-h));
            overflow-y: auto;
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu .main-nav {
            flex-direction: column;
            align-items: stretch;
            gap: 4px;
        }
        .mobile-menu .nav-link {
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 16px;
        }
        .mobile-menu .mobile-cta {
            margin-top: 16px;
            width: 100%;
        }
        @media (max-width: 767px) {
            .main-nav {
                display: none;
            }
            .header-cta {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
        }
        /* Hero */
        .category-hero {
            position: relative;
            padding: 140px 0 72px;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255, 255, 255, 0.88);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb-bar {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 28px;
        }
        .breadcrumb-bar a {
            color: var(--text-secondary);
        }
        .breadcrumb-bar a:hover {
            color: var(--primary);
        }
        .breadcrumb-bar span {
            color: var(--primary);
            font-weight: 500;
        }
        .breadcrumb-bar .sep {
            color: #c0ccd6;
            margin: 0 2px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 5px 16px;
            border-radius: 999px;
            margin-bottom: 20px;
            letter-spacing: .3px;
        }
        .category-hero h1 {
            font-size: clamp(30px, 4.2vw, 44px);
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-main);
            margin-bottom: 18px;
            max-width: 720px;
        }
        .category-hero h1 .highlight {
            color: var(--primary);
        }
        .category-hero .hero-desc {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 640px;
            margin-bottom: 32px;
        }
        .hero-btns {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        @media (max-width: 767px) {
            .category-hero {
                padding: 120px 0 48px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .hero-btns {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-btns .btn {
                width: 100%;
            }
        }
        /* Masonry */
        .masonry-section {
            padding: 80px 0;
            background: var(--bg-main);
        }
        .masonry {
            columns: 2;
            column-gap: 24px;
        }
        .masonry-item {
            break-inside: avoid;
            margin-bottom: 24px;
        }
        .masonry-item .card-img {
            width: 100%;
            object-fit: cover;
            display: block;
        }
        .masonry-item .card-body {
            padding: 20px;
        }
        .masonry-item .card-body .badge {
            margin-bottom: 10px;
        }
        .masonry-item .card-body h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-main);
            margin-bottom: 8px;
            transition: color 0.25s ease;
        }
        .masonry-item:hover .card-body h3 {
            color: var(--primary);
        }
        .masonry-item .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .masonry-item .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-card);
            padding-top: 12px;
        }
        .masonry-item .card-meta .read-more {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--primary);
            font-weight: 500;
            font-size: 13px;
        }
        .masonry-item .card-meta .read-more svg {
            width: 14px;
            height: 14px;
            transition: transform 0.25s ease;
        }
        .masonry-item:hover .card-meta .read-more svg {
            transform: translateX(3px);
        }
        @media (max-width: 767px) {
            .masonry {
                columns: 1;
                column-gap: 0;
            }
        }
        /* Value */
        .value-section {
            padding: 80px 0;
            background: #fff;
        }
        .value-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .value-item {
            padding: 32px 28px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            background: var(--bg-main);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }
        .value-item:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }
        .value-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            margin-bottom: 20px;
            transition: background 0.3s ease, color 0.3s ease;
        }
        .value-item:hover .value-icon {
            background: var(--accent-soft);
            color: var(--accent);
        }
        .value-icon svg {
            width: 24px;
            height: 24px;
        }
        .value-item h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .value-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        @media (max-width: 1023px) {
            .value-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        /* Audience */
        .audience-section {
            padding: 80px 0;
            background: var(--bg-alt);
        }
        .audience-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .audience-card {
            background: #fff;
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 26px 22px;
            text-align: center;
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }
        .audience-card:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }
        .audience-card .avatar {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary-soft);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 22px;
            font-weight: 700;
        }
        .audience-card h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .audience-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        @media (max-width: 1023px) {
            .audience-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .audience-grid {
                grid-template-columns: 1fr;
            }
        }
        /* Process */
        .process-section {
            padding: 80px 0;
            background: #fff;
        }
        .process-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            max-width: 960px;
            margin: 0 auto;
        }
        .process-item {
            position: relative;
            text-align: center;
            padding: 32px 20px;
        }
        .process-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: 0 6px 16px rgba(30, 111, 217, 0.25);
        }
        .process-item h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .process-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 240px;
            margin: 0 auto;
        }
        @media (max-width: 767px) {
            .process-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        /* FAQ */
        .faq-section {
            padding: 80px 0;
            background: var(--bg-main);
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border-card);
            border-radius: 14px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }
        .faq-item.active {
            border-color: var(--primary);
            box-shadow: 0 4px 20px rgba(30, 111, 217, 0.08);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            text-align: left;
            background: transparent;
            line-height: 1.5;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 20px;
            font-weight: 400;
            transition: transform 0.3s ease;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
            padding-bottom: 20px;
        }
        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            border-top: 1px solid var(--border-card);
            padding-top: 16px;
        }
        /* Sub CTA */
        .sub-cta-section {
            padding: 40px 0 80px;
            background: var(--bg-main);
        }
        .sub-cta-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            background: var(--bg-alt);
            border: 1px solid var(--border-card);
            border-radius: 16px;
            padding: 28px 32px;
            flex-wrap: wrap;
        }
        .sub-cta-bar h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.5;
        }
        .sub-cta-bar p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 4px;
        }
        .sub-cta-bar .btn {
            flex-shrink: 0;
        }
        @media (max-width: 640px) {
            .sub-cta-bar {
                flex-direction: column;
                align-items: flex-start;
                padding: 22px;
            }
            .sub-cta-bar .btn {
                width: 100%;
            }
        }
        /* Footer */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.7);
            padding-top: 60px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-brand .logo {
            margin-bottom: 16px;
        }
        .footer-brand .logo-icon {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }
        .footer-brand .logo-text {
            color: #fff;
            font-size: 18px;
        }
        .footer-brand .logo-text em {
            color: #6fa9f0;
        }
        .footer-brand-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 18px;
            max-width: 320px;
        }
        .footer-icp {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
            border: 1px dashed rgba(255, 255, 255, 0.15);
            border-radius: 8px;
            padding: 8px 12px;
            display: inline-block;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: color 0.25s ease;
        }
        .footer-col ul a:hover {
            color: #fff;
        }
        .footer-contact p {
            font-size: 14px;
            line-height: 2;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45);
        }
        @media (max-width: 1023px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 639px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        /* Focus */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }