/* roulang page: index */
:root {
  --primary: #1E8FFF;
  --primary-dark: #0A78E8;
  --primary-light: #F3F8FE;
  --accent: #FF6A3D;
  --accent-dark: #F45528;
  --success: #16B18A;
  --text-primary: #1E2A3B;
  --text-secondary: #5B6B7C;
  --text-muted: #8A99A9;
  --border: #E3ECF5;
  --bg-white: #FFFFFF;
  --bg-dark: #142C52;
  --text-on-dark: #EDF4FE;
  --radius-card: 16px;
  --radius-btn: 12px;
  --radius-tag: 20px;
  --shadow-card: 0 4px 16px rgba(20,44,82,0.06);
  --shadow-hover: 0 12px 32px rgba(20,44,82,0.12);
  --shadow-btn-blue: 0 8px 24px rgba(30,143,255,0.25);
  --shadow-btn-orange: 0 8px 24px rgba(255,106,61,0.25);
  --space-section: 90px;
  --space-section-mobile: 56px;
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-family);
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: var(--primary); transition: color .3s ease; }
a:hover { color: var(--primary-dark); }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space-section) 0; }
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-light);
  padding: 6px 16px;
  border-radius: var(--radius-tag);
  margin-bottom: 14px;
}
.section-title { font-size: 30px; font-weight: 700; line-height: 1.3; color: var(--text-primary); margin-bottom: 18px; }
.section-desc { font-size: 15px; color: var(--text-secondary); max-width: 720px; line-height: 1.8; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
  padding: 14px 30px;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  min-height: 48px;
  transition: all .3s ease;
  text-align: center;
}
.btn:focus {
  outline: 2px solid rgba(30,143,255,.4);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-btn-blue);
}
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); }
.btn-primary:active { transform: translateY(0); }
.btn-orange {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-btn-orange);
}
.btn-orange:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); }
.btn-orange:active { transform: translateY(0); }
.btn-outline {
  background: rgba(255,255,255,.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,.7);
}
.btn-outline:hover { background: rgba(255,255,255,.25); color: #fff; transform: translateY(-2px); }
.btn-secondary {
  background: var(--bg-white);
  color: var(--primary);
  border: 1px solid var(--primary);
}
.btn-secondary:hover { background: #F0F7FF; color: var(--primary-dark); transform: translateY(-2px); }

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 72px;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: background .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.site-header.scrolled {
  background: rgba(255,255,255,.98);
  border-color: var(--border);
  box-shadow: 0 4px 20px rgba(20,44,82,.06);
}
.header-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  box-shadow: 0 4px 12px rgba(30,143,255,.3);
}
.logo-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: .5px;
  white-space: nowrap;
}
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 32px;
}
.main-nav ul li a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 2px;
  position: relative;
  transition: color .3s ease;
}
.main-nav ul li a::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width .3s ease;
}
.main-nav ul li a:hover { color: var(--primary); }
.main-nav ul li a:hover::after { width: 100%; }
.main-nav ul li a.active { color: var(--primary); font-weight: 600; }
.main-nav ul li a.active::after { width: 100%; }
.nav-cta {
  min-height: 44px;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-btn-orange);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all .3s ease;
  white-space: nowrap;
}
.nav-cta:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); }
.nav-cta i { font-size: 14px; }
.nav-cta-mobile { display: none; }
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-white);
  color: var(--text-primary);
  font-size: 18px;
  align-items: center;
  justify-content: center;
  transition: all .3s ease;
}
.menu-toggle:hover { border-color: var(--primary); color: var(--primary); }

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(20,44,82,.55) 0%, rgba(30,143,255,.25) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 60px;
}
.hero-text h1 {
  font-size: 46px;
  font-weight: 800;
  color: #fff;
  line-height: 1.28;
  margin-bottom: 24px;
  letter-spacing: 1px;
}
.hero-sub {
  font-size: 17px;
  color: rgba(255,255,255,.92);
  line-height: 1.85;
  margin-bottom: 36px;
  max-width: 540px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.hero-card-wrap {
  flex-shrink: 0;
}
.hero-card {
  position: relative;
  border-radius: 20px;
  overflow: visible;
  box-shadow: 0 20px 60px rgba(20,44,82,.3);
  border: 3px solid rgba(255,255,255,.35);
  max-width: 420px;
  margin-left: auto;
}
.hero-card img {
  width: 100%;
  border-radius: 17px;
  aspect-ratio: 4/3;
  object-fit: cover;
}
.hero-badge {
  position: absolute;
  top: -16px;
  right: 24px;
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(255,106,61,.4);
  border: 3px solid #fff;
}

.services-section { background: var(--bg-white); }
.service-grid { display: flex; gap: 24px; }
.service-card-large {
  background: var(--primary-light);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 380px;
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}
.service-card-large::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: rgba(30,143,255,.08);
}
.service-card-large:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.service-card-large .service-icon {
  width: 68px;
  height: 68px;
  border-radius: 16px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-btn-blue);
  transition: all .3s ease;
}
.service-card-large:hover .service-icon { background: var(--accent); box-shadow: var(--shadow-btn-orange); }
.service-card-large h3 { font-size: 22px; font-weight: 700; margin-bottom: 12px; }
.service-card-large p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px; }
.service-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .3s ease;
}
.service-link:hover { gap: 12px; color: var(--accent); }

.service-right { display: flex; flex-direction: column; gap: 20px; }
.service-card-small {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: all .3s ease;
  flex: 1;
}
.service-card-small:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.service-card-small .service-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
  transition: all .3s ease;
}
.service-card-small:hover .service-icon {
  background: var(--accent);
  color: #fff;
}
.service-card-small .service-info h3 { font-size: 17px; font-weight: 600; margin-bottom: 4px; }
.service-card-small .service-info p { font-size: 14px; color: var(--text-secondary); margin: 0; line-height: 1.6; }

.stats-section {
  background: var(--bg-dark);
  padding: var(--space-section) 0;
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 40px solid rgba(255,255,255,.03);
}
.stats-grid { display: flex; gap: 0; position: relative; z-index: 1; }
.stat-item {
  flex: 1;
  text-align: center;
  padding: 20px 24px;
  border-left: 1px solid rgba(255,255,255,.15);
}
.stat-item:first-child { border-left: none; }
.stat-number {
  font-size: 44px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  font-feature-settings: "tnum";
  margin-bottom: 6px;
}
.stat-number span { font-size: 22px; color: var(--primary); margin-left: 2px; }
.stat-label { font-size: 14px; color: rgba(237,244,254,.7); }

.cases-section { background: var(--bg-white); }
.cases-grid { display: flex; gap: 24px; }
.case-card-large {
  flex: 1.4;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all .3s ease;
  background: #fff;
  border: 1px solid var(--border);
}
.case-card-large:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.case-image-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}
.case-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.case-card-large:hover .case-image-wrap img { transform: scale(1.03); }
.case-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(20,44,82,.6), transparent);
  opacity: 0;
  transition: opacity .3s ease;
}
.case-card-large:hover .case-overlay { opacity: 1; }
.case-body { padding: 28px; }
.case-body h3 { font-size: 19px; font-weight: 700; margin-bottom: 8px; }
.case-body p { font-size: 14px; color: var(--text-secondary); margin: 0; }
.case-card-small {
  flex: 1;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  transition: all .3s ease;
  display: flex;
  flex-direction: column;
}
.case-card-small:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.case-card-small .case-image-wrap { flex: 1; }
.case-card-small .case-body { padding: 20px 24px; }
.case-card-small .case-body h3 { font-size: 17px; margin-bottom: 6px; }
.case-card-small .case-body p { font-size: 13px; }
.case-right { display: flex; flex-direction: column; gap: 24px; flex: 1; }

.solutions-section { background: var(--primary-light); }
.solutions-grid { display: flex; gap: 60px; align-items: flex-start; }
.solutions-left { flex: 1; }
.solutions-left .section-desc { margin-bottom: 24px; }
.solutions-features {
  margin-bottom: 28px;
  padding: 0;
}
.solutions-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--text-secondary);
  padding: 8px 0;
}
.solutions-features li i {
  color: var(--success);
  font-size: 16px;
}
.solutions-steps { flex: 1.2; }
.step-item {
  display: flex;
  gap: 20px;
  padding: 28px;
  background: var(--bg-white);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  margin-bottom: 20px;
  transition: all .3s ease;
  position: relative;
}
.step-item:hover { box-shadow: var(--shadow-hover); transform: translateX(6px); }
.step-item:last-child { margin-bottom: 0; }
.step-item::after {
  content: '';
  position: absolute;
  left: 48px;
  bottom: -20px;
  width: 1px;
  height: 20px;
  background: var(--border);
}
.step-item:last-child::after { display: none; }
.step-number {
  font-size: 40px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  font-feature-settings: "tnum";
  min-width: 56px;
}
.step-item h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.step-item p { font-size: 14px; color: var(--text-secondary); margin: 0; line-height: 1.7; }

.news-section { background: var(--bg-white); }
.news-list { display: flex; flex-direction: column; gap: 20px; }
.news-featured {
  display: flex;
  gap: 0;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all .3s ease;
}
.news-featured:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.news-featured .news-thumb {
  flex: 1;
  aspect-ratio: 16/8;
  overflow: hidden;
}
.news-featured .news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.news-featured:hover .news-thumb img { transform: scale(1.03); }
.news-featured .news-body {
  flex: 1;
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.news-featured .news-body h3 { font-size: 21px; font-weight: 700; margin-bottom: 12px; line-height: 1.4; }
.news-featured .news-body p { font-size: 15px; color: var(--text-secondary); margin-bottom: 18px; }
.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.news-meta span {
  font-size: 13px;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.news-meta .news-cat {
  background: #F0F5FA;
  color: #5B6B7C;
  padding: 4px 14px;
  border-radius: var(--radius-tag);
  font-weight: 500;
}
.news-more {
  margin-left: auto;
  font-weight: 600;
  color: var(--primary) !important;
}
.news-row {
  display: flex;
  gap: 24px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: all .3s ease;
}
.news-row:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.news-row .news-thumb {
  width: 180px;
  min-width: 180px;
  aspect-ratio: 3/2;
  overflow: hidden;
  border-radius: 12px;
}
.news-row .news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.news-row:hover .news-thumb img { transform: scale(1.05); }
.news-row .news-body { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.news-row .news-body h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.news-row .news-body p { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; }
.news-row .news-meta { gap: 12px; }
.news-empty {
  background: var(--bg-white);
  border: 1px dashed var(--border);
  border-radius: var(--radius-card);
  padding: 60px;
  text-align: center;
  color: var(--text-muted);
  font-size: 15px;
  box-shadow: var(--shadow-card);
}

.faq-section { background: var(--bg-white); }
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-accordion { padding: 0; margin: 0; list-style: none; }
.faq-accordion .accordion-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all .3s ease;
}
.faq-accordion .accordion-item:hover { border-color: var(--primary); }
.faq-accordion .accordion-item.is-active { border-color: var(--primary); box-shadow: var(--shadow-hover); }
.faq-accordion .accordion-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
  border: none;
  min-height: 64px;
  transition: all .3s ease;
}
.faq-accordion .accordion-title:hover { color: var(--primary); }
.faq-accordion .accordion-title::after { content: none; }
.faq-icon {
  width: 28px;
  height: 28px;
  min-width: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 13px;
  transition: all .4s ease;
}
.accordion-item.is-active .faq-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(135deg);
}
.faq-accordion .accordion-content {
  padding: 0 28px 24px;
  border-top: 1px dashed var(--border);
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  background: transparent;
}

.contact-section {
  background: linear-gradient(90deg, #FFFFFF 0%, var(--primary-light) 100%);
  position: relative;
  overflow: hidden;
}
.contact-section::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 30px solid rgba(30,143,255,.05);
}
.contact-grid { display: flex; gap: 40px; align-items: flex-start; position: relative; z-index: 1; }
.contact-info { flex: 1; }
.contact-info .section-title { margin-bottom: 12px; }
.contact-info .section-desc { margin-bottom: 28px; }
.contact-methods { padding: 0; }
.contact-methods li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 0;
  font-size: 15px;
  color: var(--text-secondary);
}
.contact-methods li i {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: 12px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  box-shadow: var(--shadow-card);
}
.contact-form-card {
  flex: 1;
  background: var(--bg-white);
  border-radius: 20px;
  padding: 36px;
  box-shadow: var(--shadow-hover);
  border: 1px solid var(--border);
}
.contact-form-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 24px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.form-group label .required { color: var(--accent); }
.form-group input,
.form-group textarea {
  width: 100%;
  height: 48px;
  border: 1px solid #D3E4F2;
  border-radius: var(--radius-btn);
  padding: 0 16px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text-primary);
  transition: border-color .3s ease, box-shadow .3s ease;
  background: #fafcfe;
}
.form-group textarea {
  height: 120px;
  padding: 14px 16px;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30,143,255,.2);
  background: var(--bg-white);
}
.form-group input.error,
.form-group textarea.error { border-color: #e74c3c; }
.form-submit {
  width: 100%;
  height: 52px;
  font-size: 16px;
  font-weight: 600;
}

.site-footer {
  background: var(--bg-dark);
  padding: 80px 0 0;
  color: rgba(237,244,254,.7);
}
.footer-grid {
  display: flex;
  gap: 40px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-col { flex: 1; }
.footer-col:first-child { flex: 1.4; }
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.footer-logo .logo-icon { width: 38px; height: 38px; font-size: 16px; }
.footer-logo .logo-text { color: var(--text-on-dark); font-size: 20px; }
.footer-desc { font-size: 14px; line-height: 1.8; margin-bottom: 20px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(255,255,255,.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(237,244,254,.8);
  font-size: 15px;
  transition: all .3s ease;
}
.footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 14px;
  color: rgba(237,244,254,.7);
  transition: color .3s ease;
}
.footer-col ul li a:hover { color: #fff; }
.footer-col ul li i { margin-right: 6px; color: var(--primary); width: 16px; }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 13px; color: rgba(237,244,254,.5); }
.footer-bottom .copyright { color: rgba(237,244,254,.5); }
.footer-bottom .copyright strong { color: var(--text-on-dark); font-weight: 600; }

@media (max-width: 1024px) {
  .hero-content { flex-direction: column; gap: 40px; text-align: center; }
  .hero-card-wrap { margin: 0 auto; width: 100%; max-width: 460px; }
  .hero-actions { justify-content: center; }
  .service-grid { flex-direction: column; }
  .service-card-large { min-height: auto; }
  .cases-grid { flex-direction: column; }
  .solutions-grid { flex-direction: column; gap: 40px; }
  .contact-grid { flex-direction: column; }
  .footer-grid { flex-wrap: wrap; gap: 30px; }
  .footer-col { flex: 1 1 calc(50% - 30px); }
  .footer-col:first-child { flex: 1 1 100%; }
  .stats-grid { flex-wrap: wrap; }
  .stat-item { flex: 1 1 50%; border-left: none; border-bottom: 1px solid rgba(255,255,255,.15); }
  .stat-item:nth-child(odd) { border-right: 1px solid rgba(255,255,255,.15); }
  .stat-item:nth-child(even) { border-left: none; }
  .stat-item:nth-last-child(-n+2) { border-bottom: none; }
}
@media (max-width: 767px) {
  :root { --space-section: var(--space-section-mobile); }
  .container { padding: 0 20px; }
  .section-title { font-size: 24px; }
  .hero { padding: 100px 0 60px; min-height: auto; }
  .hero-text h1 { font-size: 30px; }
  .hero-sub { font-size: 15px; }
  .menu-toggle { display: inline-flex; }
  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0; right: 0;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 32px rgba(20,44,82,.1);
    padding: 24px 20px;
    z-index: 999;
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; align-items: flex-start; gap: 8px; }
  .main-nav ul li { width: 100%; }
  .main-nav ul li a { display: block; padding: 12px 0; font-size: 16px; width: 100%; }
  .nav-cta { display: none; }
  .nav-cta-mobile { display: inline-flex; width: 100%; justify-content: center; margin-top: 16px; min-height: 48px; }
  .news-featured { flex-direction: column; }
  .news-featured .news-thumb { aspect-ratio: 16/9; }
  .news-featured .news-body { padding: 24px; }
  .news-row { flex-direction: column; padding: 16px; }
  .news-row .news-thumb { width: 100%; min-width: 0; aspect-ratio: 16/9; }
  .news-row .news-body { padding: 12px 4px 4px; }
  .news-more { margin-left: 0; }
  .contact-form-card { padding: 24px; }
  .footer-grid { flex-direction: column; gap: 32px; }
  .footer-col { flex: 1 1 100%; }
  .stats-grid { flex-wrap: wrap; }
  .stat-item { flex: 1 1 100%; text-align: center; padding: 24px; border: none; border-bottom: 1px solid rgba(255,255,255,.15); }
  .stat-item:last-child { border-bottom: none; }
  .stat-item:nth-child(odd) { border-right: none; }
  .step-item { padding: 20px; }
  .step-number { font-size: 32px; min-width: 44px; }
  .faq-accordion .accordion-title { padding: 18px 20px; font-size: 15px; }
  .faq-accordion .accordion-content { padding: 0 20px 20px; }
  .hero-card { max-width: 100%; }
}

/* roulang page: category1 */
:root {
  --primary: #1E8FFF;
  --primary-dark: #0A78E8;
  --primary-light: #F3F8FE;
  --accent: #FF6A3D;
  --accent-dark: #F45528;
  --green: #16B18A;
  --text: #1E2A3B;
  --text-secondary: #5B6B7C;
  --text-muted: #8A99A9;
  --border: #E3ECF5;
  --dark-bg: #142C52;
  --dark-text: #EDF4FE;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow-sm: 0 4px 16px rgba(20,44,82,0.06);
  --shadow-lg: 0 12px 32px rgba(20,44,82,0.12);
  --btn-shadow-blue: 0 8px 24px rgba(30,143,255,0.25);
  --btn-shadow-orange: 0 8px 24px rgba(255,106,61,0.25);
  --container-w: 1200px;
  --section-gap: 90px;
}

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

html {
  scroll-behavior: smooth;
}

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

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color .25s ease, background .25s ease, border-color .25s ease, box-shadow .25s ease, transform .25s ease;
}

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

ul {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 14px 30px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all .3s ease;
  white-space: nowrap;
}

.btn i {
  font-size: 15px;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(30,143,255,0.4);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--btn-shadow-blue);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(30,143,255,0.35);
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 4px 12px rgba(30,143,255,0.2);
}

.btn-orange {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--btn-shadow-orange);
}

.btn-orange:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(255,106,61,0.35);
}

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

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

.btn-outline:hover {
  background: #F0F7FF;
  color: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
}

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

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
  font-size: 15px;
  background: none;
  border: none;
  padding: 8px 0;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all .3s ease;
}

.btn-link:hover {
  color: var(--primary-dark);
  border-bottom-color: var(--primary);
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(227,236,245,0.7);
  transition: background .3s ease, box-shadow .3s ease;
}

.site-header.scrolled {
  background: #fff;
  box-shadow: 0 4px 24px rgba(20,44,82,0.08);
}

.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: 10px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 4px 12px rgba(30,143,255,0.3);
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 1px;
  line-height: 1.2;
}

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

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
}

.main-nav ul li a {
  display: block;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
  position: relative;
  transition: color .3s ease, background .3s ease;
}

.main-nav ul li a::after {
  content: '';
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 4px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform .3s ease;
}

.main-nav ul li a:hover {
  color: var(--primary);
}

.main-nav ul li a:hover::after,
.main-nav ul li a.active::after {
  transform: scaleX(1);
}

.main-nav ul li a.active {
  color: var(--primary);
  font-weight: 600;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  box-shadow: var(--btn-shadow-orange);
  transition: all .3s ease;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-cta:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(255,106,61,0.35);
}

.nav-cta-mobile {
  display: none;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  background: none;
  font-size: 22px;
  color: var(--text);
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: background .3s ease;
}

.menu-toggle:hover {
  background: var(--primary-light);
}

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  min-height: 45vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  margin-top: 72px;
  overflow: hidden;
}

.page-hero .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(20,44,82,0.25) 0%, rgba(20,44,82,0.45) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 60px 24px;
  max-width: 800px;
}

.hero-breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.9);
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 6px 18px;
  border-radius: 30px;
  margin-bottom: 20px;
  backdrop-filter: blur(4px);
}

.hero-breadcrumb a {
  color: rgba(255,255,255,0.85);
  transition: color .3s ease;
}

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

.hero-breadcrumb span {
  opacity: 0.6;
}

.page-hero h1 {
  font-size: 42px;
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
  letter-spacing: 1px;
  text-shadow: 0 4px 20px rgba(20,44,82,0.4);
  margin-bottom: 16px;
}

.page-hero .hero-subtitle {
  font-size: 17px;
  color: rgba(237,244,254,0.95);
  line-height: 1.7;
  max-width: 620px;
  margin: 0 auto;
  text-shadow: 0 2px 10px rgba(20,44,82,0.3);
}

/* ===== Guide Blocks ===== */
.guide-blocks {
  padding: var(--section-gap) 0;
  background: #fff;
}

.guide-block {
  margin-bottom: 80px;
  padding: 0;
}

.guide-block:last-child {
  margin-bottom: 0;
}

.guide-text {
  padding: 20px 30px;
}

.guide-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 18px;
  border: 2px solid rgba(30,143,255,0.15);
}

.guide-text h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
  margin-bottom: 16px;
}

.guide-text p {
  color: var(--text-secondary);
  font-size: 15.5px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.guide-features {
  margin: 20px 0 24px;
}

.guide-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--text);
  margin-bottom: 12px;
  line-height: 1.6;
}

.guide-features li i {
  color: var(--primary);
  font-size: 14px;
  margin-top: 3px;
  flex-shrink: 0;
}

.guide-img {
  padding: 10px;
  position: relative;
}

.guide-img .img-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  background: #fff;
  position: relative;
  aspect-ratio: 4 / 3;
}

.guide-img .img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

.guide-img:hover .img-wrap img {
  transform: scale(1.03);
}

.guide-img .img-flag {
  position: absolute;
  bottom: 18px;
  right: 18px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 20px;
  box-shadow: 0 4px 14px rgba(255,106,61,0.4);
  z-index: 2;
}

/* ===== Data Strip ===== */
.data-strip {
  background: var(--primary-light);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 50px 0;
}

.data-strip .grid-x {
  align-items: center;
}

.data-strip .cell {
  text-align: center;
  padding: 20px 15px;
  position: relative;
}

.data-strip .cell:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 48px;
  background: rgba(30,143,255,0.2);
}

.data-strip .data-num {
  font-size: 38px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  font-feature-settings: "tnum";
  margin-bottom: 4px;
}

.data-strip .data-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 1px;
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--section-gap) 0;
  background: #fff;
}

.section-head {
  text-align: center;
  margin-bottom: 50px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-light);
  padding: 6px 20px;
  border-radius: 30px;
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

.section-head p {
  color: var(--text-secondary);
  font-size: 15px;
  margin-top: 10px;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

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

.accordion {
  border-radius: var(--radius-lg);
  background: transparent;
  list-style: none;
  margin: 0;
  padding: 0;
}

.accordion-item {
  margin-bottom: 16px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .3s ease, border-color .3s ease;
}

.accordion-item:hover {
  border-color: rgba(30,143,255,0.3);
  box-shadow: var(--shadow-lg);
}

.accordion-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  gap: 16px;
  min-height: 64px;
  background: transparent;
  border: none;
  transition: color .3s ease;
}

.accordion-title:hover {
  color: var(--primary);
  background: #FCFDFF;
}

.accordion-title .acc-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--primary);
  flex-shrink: 0;
  transition: all .3s ease;
}

.accordion-item.is-active .accordion-title .acc-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}

.accordion-item.is-active .accordion-title {
  color: var(--primary);
}

.accordion-content {
  display: none;
  padding: 0 24px 22px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  border-top: 1px solid #f0f5fa;
  margin: 0 24px;
  padding: 16px 0 20px;
  color: var(--text-secondary);
}

.accordion-item.is-active .accordion-content {
  display: block;
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(120deg, #F3F8FE 0%, #E8F2FD 100%);
  position: relative;
  overflow: hidden;
}

.cta-section::before,
.cta-section::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: rgba(30,143,255,0.06);
}

.cta-section::before {
  width: 240px;
  height: 240px;
  top: -80px;
  left: -60px;
}

.cta-section::after {
  width: 300px;
  height: 300px;
  bottom: -100px;
  right: -80px;
}

.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
  margin-bottom: 14px;
}

.cta-inner p {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 30px;
  line-height: 1.8;
}

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

/* ===== Footer ===== */
.site-footer {
  background: var(--dark-bg);
  color: rgba(255,255,255,0.7);
  padding: 70px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-logo .logo-icon {
  background: var(--primary);
  color: #fff;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.footer-logo .logo-text {
  color: #fff;
  font-size: 19px;
  font-weight: 700;
}

.footer-desc {
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(255,255,255,0.65);
  margin-bottom: 18px;
  max-width: 300px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
  font-size: 15px;
  transition: all .3s ease;
}

.footer-social a:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-3px);
}

.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: 1px;
}

.footer-col ul {
  margin: 0;
  padding: 0;
}

.footer-col ul li {
  margin-bottom: 12px;
  font-size: 14px;
  line-height: 1.6;
}

.footer-col ul li a {
  color: rgba(255,255,255,0.65);
  transition: color .3s ease, padding-left .3s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-col ul li a:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-col ul li a i {
  font-size: 11px;
  color: var(--primary);
}

.footer-col ul li i {
  margin-right: 8px;
  color: var(--primary);
  font-size: 13px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  flex-wrap: wrap;
  gap: 8px;
}

.footer-bottom strong {
  color: rgba(255,255,255,0.6);
  font-weight: 600;
}

.footer-bottom a {
  color: rgba(255,255,255,0.4);
  transition: color .3s ease;
}

.footer-bottom a:hover {
  color: rgba(255,255,255,0.7);
}

/* ===== Responsive ===== */
@media (max-width: 1199px) {
  .container {
    padding: 0 20px;
  }
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --section-gap: 56px;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 12px 32px rgba(20,44,82,0.12);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px 24px;
    gap: 4px;
    transform: translateY(-120%);
    opacity: 0;
    transition: transform .35s ease, opacity .35s ease;
    z-index: 999;
    border-radius: 0 0 16px 16px;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
  }

  .main-nav ul {
    flex-direction: column;
    width: 100%;
  }

  .main-nav ul li {
    width: 100%;
  }

  .main-nav ul li a {
    padding: 14px 18px;
    font-size: 16px;
    border-radius: 10px;
  }

  .main-nav ul li a::after {
    left: 18px;
    right: auto;
    width: 24px;
  }

  .nav-cta {
    display: none;
  }

  .nav-cta-mobile {
    display: flex;
    width: 100%;
    justify-content: center;
    margin-top: 12px;
    min-height: 48px;
  }

  .page-hero {
    min-height: 40vh;
    margin-top: 72px;
  }

  .page-hero h1 {
    font-size: 30px;
  }

  .page-hero .hero-subtitle {
    font-size: 15px;
  }

  .hero-content {
    padding: 48px 20px;
  }

  .guide-block {
    margin-bottom: 48px;
  }

  .guide-text {
    padding: 16px 4px;
  }

  .guide-text h2 {
    font-size: 22px;
  }

  .guide-img {
    padding: 4px 0;
    margin-top: 20px;
  }

  .data-strip .cell {
    padding: 24px 12px;
  }

  .data-strip .cell:not(:last-child)::after {
    display: none;
  }

  .data-strip .data-num {
    font-size: 30px;
  }

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

  .cta-inner h2 {
    font-size: 24px;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 6px;
  }
}

@media (max-width: 520px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-desc {
    max-width: 100%;
  }

  .hero-content h1 {
    font-size: 26px;
  }

  .hero-breadcrumb {
    font-size: 12px;
    padding: 5px 14px;
  }

  .btn {
    min-height: 44px;
    padding: 12px 22px;
    font-size: 15px;
  }

  .accordion-title {
    padding: 16px 16px;
    font-size: 15px;
  }

  .accordion-content {
    padding: 14px 16px 16px;
    font-size: 14px;
  }
}

@media (min-width: 1200px) and (max-width: 1400px) {
  .container {
    padding: 0 32px;
  }
}

/* roulang page: article */
/* ===== 设计变量 ===== */
:root{
  --primary:#1E8FFF;
  --primary-dark:#0A78E8;
  --primary-light:#F3F8FE;
  --accent:#FF6A3D;
  --accent-hover:#F45528;
  --green:#16B18A;
  --text:#1E2A3B;
  --text-secondary:#5B6B7C;
  --text-muted:#8A99A9;
  --border:#E3ECF5;
  --bg:#FFFFFF;
  --dark:#142C52;
  --dark-text:#EDF4FE;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-sm:0 4px 16px rgba(20,44,82,.06);
  --shadow-lg:0 12px 32px rgba(20,44,82,.12);
  --shadow-primary:0 8px 24px rgba(30,143,255,.25);
  --shadow-accent:0 8px 24px rgba(255,106,61,.25);
}
/* ===== Reset / Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
  font-size:15px;line-height:1.75;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:all .2s ease}
ul,ol{list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
body.article-page{padding-top:72px}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:12px 30px;border-radius:12px;font-size:16px;font-weight:600;
  border:2px solid transparent;cursor:pointer;transition:all .25s ease;text-decoration:none;white-space:nowrap;
}
.btn:focus-visible{outline:2px solid rgba(30,143,255,.4);outline-offset:2px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow-primary)}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(10,120,232,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:var(--shadow-accent)}
.btn-accent:hover{background:var(--accent-hover);color:#fff;transform:translateY(-2px)}
.btn-accent:active{transform:translateY(0)}
.btn-outline{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary-light);color:var(--primary-dark);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(0)}

/* ===== 导航 ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;height:72px;
  background:#fff;border-bottom:1px solid var(--border);box-shadow:0 4px 20px rgba(20,44,82,.05);
  transition:all .3s ease;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.logo-icon{
  width:42px;height:42px;border-radius:12px;background:var(--primary);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px;
  box-shadow:0 4px 12px rgba(30,143,255,.3);
}
.logo-text{font-size:22px;font-weight:700;color:var(--primary);letter-spacing:.5px}
.main-nav{display:flex;align-items:center;gap:32px;margin-left:auto;margin-right:28px}
.main-nav>ul{display:flex;align-items:center;gap:32px;margin:0;padding:0}
.main-nav>ul>li{list-style:none}
.main-nav>ul>li>a{
  display:inline-block;position:relative;font-size:15px;font-weight:500;color:var(--text);
  line-height:44px;text-decoration:none;transition:color .2s;
}
.main-nav>ul>li>a::after{
  content:"";position:absolute;left:0;bottom:8px;width:0;height:2px;background:var(--primary);border-radius:2px;transition:width .25s;
}
.main-nav>ul>li>a:hover{color:var(--primary)}
.main-nav>ul>li>a:hover::after{width:100%}
.main-nav>ul>li>a.active{color:var(--primary);font-weight:600}
.main-nav>ul>li>a.active::after{width:100%}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:10px 22px;border-radius:12px;
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;text-decoration:none;
  box-shadow:0 4px 14px rgba(255,106,61,.3);transition:all .25s;flex-shrink:0;
}
.nav-cta:hover{background:var(--accent-hover);color:#fff;transform:translateY(-2px);box-shadow:0 8px 20px rgba(255,106,61,.35)}
.nav-cta i{font-size:15px}
.nav-cta-mobile{display:none}
.menu-toggle{display:none;width:44px;height:44px;border:none;background:transparent;color:var(--text);font-size:22px;cursor:pointer;border-radius:10px;align-items:center;justify-content:center}
.menu-toggle:hover{background:var(--primary-light)}

/* ===== 面包屑 ===== */
.breadcrumb-wrap{
  background:var(--primary-light);padding:18px 0;border-bottom:1px solid var(--border);
}
.breadcrumb{font-size:13px;color:var(--text-muted);display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb a{color:var(--text-muted);text-decoration:none;transition:color .2s}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--text-muted);opacity:.5}
.breadcrumb .current{color:var(--text-secondary);max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ===== 文章头部 ===== */
.article-page-wrap{padding:48px 0 60px}
.article-header{max-width:800px;margin:0 auto 24px;text-align:center;padding:0 24px}
.article-header h1{
  font-size:34px;line-height:1.35;font-weight:700;color:var(--text);margin-bottom:18px;
  letter-spacing:.5px;
}
.article-meta{
  display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:10px;
  font-size:13px;color:var(--text-muted);background:var(--primary-light);
  padding:10px 20px;border-radius:30px;width:fit-content;margin:0 auto;
}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.article-meta i{font-size:13px;color:var(--primary)}
.article-meta .dot{color:var(--border);font-weight:700}

/* ===== 封面图 ===== */
.article-cover{
  max-width:960px;margin:0 auto 40px;padding:0 24px;
}
.article-cover img{
  width:100%;border-radius:20px;box-shadow:var(--shadow-lg);aspect-ratio:16/7;object-fit:cover;
}

/* ===== 正文阅读区 ===== */
.article-content-wrap{max-width:800px;margin:0 auto;padding:0 24px}
.article-content{font-size:16px;line-height:1.85;color:var(--text);word-break:break-word}
.article-content>p{margin-bottom:1.6em}
.article-content h2{
  font-size:25px;font-weight:700;color:var(--text);margin:2.2em 0 .8em;padding-bottom:.4em;border-bottom:1px solid var(--border);
}
.article-content h3{font-size:20px;font-weight:700;color:var(--text);margin:1.8em 0 .7em}
.article-content h4{font-size:17px;font-weight:700;color:var(--text);margin:1.5em 0 .5em}
.article-content blockquote{
  border-left:4px solid var(--primary);background:#F5F8FC;padding:18px 22px;border-radius:8px;
  margin:1.6em 0;color:var(--text-secondary);font-size:15px;
}
.article-content img{width:100%;border-radius:12px;margin:1.6em 0;aspect-ratio:16/9;object-fit:cover}
.article-content a{color:var(--primary);text-decoration:none;border-bottom:1px solid transparent}
.article-content a:hover{border-bottom-color:var(--primary)}
.article-content ul,.article-content ol{margin:1em 0 1.6em;padding-left:1.8em}
.article-content ul{list-style:disc}
.article-content ol{list-style:decimal}
.article-content ul li,.article-content ol li{margin-bottom:.5em;padding-left:.2em}
.article-content table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:14px;border-radius:10px;overflow:hidden}
.article-content table th{background:var(--primary-light);padding:12px 16px;border:1px solid var(--border);text-align:left;font-weight:600;color:var(--text)}
.article-content table td{padding:10px 16px;border:1px solid var(--border);color:var(--text-secondary)}
.article-content table tr:hover{background:#FAFCFF}
.article-content code{background:var(--dark);color:var(--dark-text);padding:2px 8px;border-radius:6px;font-size:14px;font-family:Consolas,Monaco,monospace}
.article-content pre{background:var(--dark);color:var(--dark-text);padding:22px;border-radius:12px;overflow-x:auto;margin:1.6em 0;line-height:1.6}
.article-content pre code{background:transparent;padding:0;color:inherit}
.article-content hr{border:none;border-top:1px solid var(--border);margin:2em 0}
.article-content figcaption{text-align:center;font-size:12px;color:var(--text-muted);margin-top:-1em}

/* ===== 空状态 ===== */
.article-empty{
  text-align:center;padding:80px 24px;background:var(--primary-light);border-radius:20px;border:1px dashed var(--border);
}
.article-empty .empty-icon{
  width:72px;height:72px;border-radius:50%;background:#fff;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;font-size:28px;color:var(--text-muted);box-shadow:var(--shadow-sm);
}
.article-empty h3{font-size:22px;font-weight:700;color:var(--text);margin-bottom:10px}
.article-empty p{color:var(--text-secondary);margin-bottom:24px}
.article-empty .btn{min-width:160px}

/* ===== 标签区 ===== */
.article-tags-wrap{max-width:800px;margin:0 auto;padding:40px 24px 0}
.article-tags{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:center}
.tag{
  display:inline-flex;align-items:center;gap:6px;background:#F0F5FA;color:var(--text-secondary);
  font-size:12px;padding:8px 16px;border-radius:20px;text-decoration:none;transition:all .25s;
}
.tag:hover{background:var(--primary-light);color:var(--primary)}
.tag i{font-size:11px}

/* ===== 相关推荐 ===== */
.related-posts{max-width:1200px;margin:0 auto;padding:64px 24px 20px}
.related-posts .section-title{font-size:26px;font-weight:700;color:var(--text);margin-bottom:32px;text-align:center;position:relative}
.related-posts .section-title::after{content:"";display:block;width:48px;height:3px;background:var(--primary);border-radius:3px;margin:10px auto 0}
.related-card{
  background:#fff;border:1px solid var(--border);border-radius:16px;overflow:hidden;
  box-shadow:var(--shadow-sm);display:block;text-decoration:none;transition:all .3s;height:100%;
}
.related-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.related-thumb{aspect-ratio:16/9;overflow:hidden;position:relative}
.related-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.related-card:hover .related-thumb img{transform:scale(1.05)}
.related-info{padding:20px 24px 24px}
.related-info h3{font-size:16px;font-weight:600;color:var(--text);line-height:1.5;margin-bottom:10px;transition:color .2s}
.related-card:hover .related-info h3{color:var(--primary)}
.related-info .related-date{font-size:12px;color:var(--text-muted);display:flex;align-items:center;gap:6px}

/* ===== 上/下一篇 ===== */
.article-pagination{max-width:800px;margin:0 auto;padding:48px 24px 0}
.prev-next-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.prev-btn,.next-btn{
  display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--border);
  border-radius:16px;padding:20px 24px;text-decoration:none;color:var(--text);transition:all .3s;font-size:15px;font-weight:500;
}
.prev-btn:hover,.next-btn:hover{box-shadow:var(--shadow-sm);transform:translateY(-2px);border-color:var(--primary);color:var(--primary)}
.prev-btn i,.next-btn i{font-size:18px;color:var(--primary)}
.next-btn{margin-left:auto}

/* ===== 页脚 ===== */
.site-footer{background:var(--dark);color:rgba(255,255,255,.7);padding:70px 0 30px;margin-top:80px}
.site-footer a{color:rgba(255,255,255,.7);text-decoration:none;transition:color .2s}
.site-footer a:hover{color:#fff}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:50px}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-logo .logo-icon{width:40px;height:40px;border-radius:10px;background:var(--primary);display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px}
.footer-logo .logo-text{font-size:20px;font-weight:700;color:#fff}
.footer-desc{font-size:13px;line-height:1.8;color:rgba(255,255,255,.55);margin-bottom:20px}
.footer-social{display:flex;gap:10px}
.footer-social a{
  width:40px;height:40px;border-radius:10px;background:rgba(255,255,255,.08);
  display:flex;align-items:center;justify-content:center;font-size:16px;color:rgba(255,255,255,.7);transition:all .25s;
}
.footer-social a:hover{background:var(--primary);color:#fff;transform:translateY(-3px)}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:20px;text-transform:uppercase;letter-spacing:.5px}
.footer-col ul li{margin-bottom:12px;font-size:13px;display:flex;align-items:center;gap:8px}
.footer-col ul li a{display:inline-flex;align-items:center;gap:6px;font-size:13px}
.footer-col ul li i{font-size:12px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.4)}
.footer-bottom strong{color:rgba(255,255,255,.7);font-weight:600}

/* ===== 响应式 ===== */
@media screen and (max-width:1024px){
  .main-nav{gap:20px}
  .main-nav>ul{gap:20px}
  .nav-cta{padding:10px 18px;font-size:14px}
}
@media screen and (max-width:768px){
  body.article-page{padding-top:64px}
  .site-header{height:64px}
  .header-inner{height:64px}
  .menu-toggle{display:flex;margin-left:12px}
  .main-nav{
    position:fixed;top:64px;left:0;right:0;background:#fff;flex-direction:column;
    padding:24px 24px 32px;box-shadow:0 16px 40px rgba(20,44,82,.12);
    transform:translateY(-120%);transition:transform .35s ease;margin:0;border-bottom:1px solid var(--border);
    max-height:calc(100vh - 64px);overflow-y:auto;z-index:99;
  }
  .main-nav.open{transform:translateY(0)}
  .main-nav>ul{flex-direction:column;gap:0;width:100%}
  .main-nav>ul>li{width:100%}
  .main-nav>ul>li>a{display:block;width:100%;line-height:48px;border-bottom:1px solid var(--border);font-size:16px}
  .main-nav>ul>li>a::after{display:none}
  .nav-cta{display:none}
  .nav-cta-mobile{display:flex;width:100%;margin-top:20px;justify-content:center}
  .article-header h1{font-size:26px;line-height:1.4}
  .article-meta{flex-wrap:wrap;padding:8px 14px;font-size:12px}
  .article-cover img{aspect-ratio:16/10}
  .article-content-wrap{padding:0 20px}
  .article-content{font-size:15px;line-height:1.8}
  .prev-next-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media screen and (max-width:520px){
  .logo-text{font-size:19px}
  .logo-icon{width:38px;height:38px;font-size:17px}
  .article-header h1{font-size:22px}
  .article-meta span.dot{display:none}
  .article-meta{gap:6px 12px}
  .related-posts{padding:40px 16px 10px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;text-align:center}
  .footer-social{justify-content:center}
}