/* roulang page: index */
:root {
  --primary: #3B82F6;
  --primary-dark: #2563EB;
  --primary-light: #F0F5FF;
  --accent: #F59E0B;
  --bg: #F6F8FB;
  --card-bg: #FFFFFF;
  --text: #1F2937;
  --text-secondary: #6B7280;
  --border: #E5E7EB;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-tag: 6px;
  --shadow-sm: 0 1px 2px rgba(16,24,40,.04);
  --shadow-md: 0 1px 2px rgba(16,24,40,.04), 0 4px 12px rgba(16,24,40,.06);
  --shadow-lg: 0 4px 20px rgba(16,24,40,.10);
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --sidebar-width: 260px;
}
*, *::before, *::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
button {
  cursor: pointer;
}
h1, h2, h3, h4, h5 {
  margin: 0;
  font-weight: 700;
  color: var(--text);
}
p {
  margin: 0;
}
ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family);
  font-size: 15px;
  font-weight: 500;
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  transition: all .2s ease;
  line-height: 1.5;
  box-shadow: none;
}
.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(59,130,246,.15);
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 2px 12px rgba(59,130,246,.35);
}
.btn-primary:active {
  transform: scale(.98);
}
.btn-outline {
  border: 1px solid var(--primary);
  color: var(--primary);
  background: transparent;
}
.btn-outline:hover {
  background: rgba(59,130,246,.05);
}
.btn-outline:active {
  transform: scale(.98);
}
.btn-lg {
  padding: 16px 32px;
  font-size: 17px;
}
.btn-block {
  width: 100%;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: 50px;
  padding: 5px 14px;
  margin-bottom: 12px;
  letter-spacing: .5px;
}
.section-title {
  font-size: 30px;
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: -.5px;
  margin-bottom: 12px;
}
.section-sub {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}
.section-head {
  margin-bottom: 40px;
}
.badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-tag);
  padding: 4px 10px;
}

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: #fff;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: transform .3s ease;
}
.sidebar-brand {
  height: 72px;
  display: flex;
  align-items: center;
  padding: 0 24px;
  border-bottom: 1px solid var(--border);
  gap: 10px;
  flex-shrink: 0;
}
.sidebar-brand .brand-icon {
  width: 32px;
  height: 32px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}
.sidebar-brand .brand-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  letter-spacing: .3px;
}
.sidebar-nav {
  flex: 1;
  padding: 20px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 15px;
  color: var(--text);
  transition: background .2s ease, color .2s ease;
  border-left: 3px solid transparent;
}
.nav-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: .8;
}
.nav-item:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.nav-item.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
  border-left-color: var(--primary);
}
.sidebar-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ===== Main Wrapper ===== */
.main-wrapper {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Mobile Header ===== */
.mobile-header {
  display: none;
}

/* ===== Hero ===== */
.hero-section {
  background: linear-gradient(135deg, #FFFFFF 0%, var(--primary-light) 100%);
  padding: 88px 0 72px;
  position: relative;
  overflow: hidden;
}
.hero-section::before {
  content: '';
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: rgba(59,130,246,.06);
  top: -180px;
  right: -80px;
  pointer-events: none;
}
.hero-section::after {
  content: '';
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(245,158,11,.08);
  bottom: -80px;
  left: 15%;
  pointer-events: none;
}
.hero-grid {
  display: flex;
  align-items: center;
  gap: 64px;
}
.hero-text {
  flex: 1;
  z-index: 2;
  max-width: 600px;
}
.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(255,255,255,.8);
  border: 1px solid rgba(59,130,246,.15);
  border-radius: 50px;
  padding: 5px 16px;
  margin-bottom: 20px;
  letter-spacing: .5px;
}
.hero-text h1 {
  font-size: 44px;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}
.hero-text h1 .highlight {
  color: var(--primary);
}
.hero-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.hero-media {
  flex: 1;
  position: relative;
  z-index: 2;
}
.hero-media .img-wrap {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.hero-media img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}
.hero-deco {
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 12px;
  background: var(--accent);
  opacity: .2;
  bottom: -28px;
  right: -20px;
  z-index: -1;
}

/* ===== Section Spacing ===== */
.section {
  padding: 88px 0;
}

/* ===== Services ===== */
.services-section {
  background: var(--bg);
}
.services-section .section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
}
.services-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}
.service-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all .25s ease;
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.service-card.featured {
  grid-row: span 2;
  background: linear-gradient(145deg, #FFFFFF, #F8FBFF);
}
.service-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--primary);
}
.service-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.4;
}
.service-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  margin-bottom: auto;
}
.service-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
  margin-top: 16px;
  transition: gap .2s ease;
}
.service-link:hover {
  gap: 8px;
}
.service-card.featured .service-icon {
  width: 56px;
  height: 56px;
  background: var(--primary);
  color: #fff;
}
.service-card.featured h3 {
  font-size: 20px;
  margin-bottom: 12px;
}
.service-card.featured p {
  font-size: 15px;
  -webkit-line-clamp: 4;
  margin-bottom: 0;
}

/* ===== Stats ===== */
.stats-section {
  background: var(--primary-light);
  padding: 64px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center;
  padding: 16px 24px;
  position: relative;
}
.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 56px;
  background: rgba(59,130,246,.2);
}
.stat-number {
  font-size: 56px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.stat-number .suffix {
  font-size: 28px;
  color: var(--accent);
  margin-left: 2px;
}
.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ===== Cases ===== */
.cases-section {
  background: var(--bg);
}
.cases-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: stretch;
}
.case-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.case-item {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  transition: background .2s ease;
  position: relative;
}
.case-item:last-child {
  border-bottom: none;
}
.case-item:hover {
  background: rgba(240,245,255,.7);
  padding-left: 12px;
  padding-right: 12px;
  border-radius: 8px;
}
.case-thumb {
  width: 120px;
  height: 80px;
  object-fit: cover;
  border-radius: 8px;
  flex-shrink: 0;
  transition: transform .2s ease;
}
.case-item:hover .case-thumb {
  transform: scale(1.02);
}
.case-info h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  line-height: 1.4;
}
.case-info p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}
.case-featured {
  border-radius: var(--radius-card);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  min-height: 320px;
}
.case-featured img {
  flex: 1;
  object-fit: cover;
  min-height: 280px;
}
.case-featured-content {
  background: #fff;
  padding: 20px 24px;
}
.case-featured-content h3 {
  font-size: 18px;
  margin-bottom: 6px;
}
.case-featured-content p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===== Solutions ===== */
.solutions-section {
  background: #fff;
}
.solutions-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: center;
}
.solution-points {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.solution-point {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.solution-point .point-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}
.solution-point h4 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
}
.solution-point p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.flow-card {
  background: #F3F4F6;
  border-radius: 12px;
  padding: 32px;
}
.flow-step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 0;
  position: relative;
}
.flow-step:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 19px;
  top: 48px;
  width: 2px;
  height: 34px;
  background: var(--border);
}
.flow-step .step-num {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}
.flow-step h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}
.flow-step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ===== News ===== */
.news-section {
  background: var(--bg);
}
.news-list {
  display: flex;
  flex-direction: column;
}
.news-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
  transition: background .2s ease;
}
.news-item:last-child {
  border-bottom: none;
}
.news-item:hover {
  background: rgba(240,245,255,.6);
  border-radius: 8px;
  padding-left: 12px;
  padding-right: 12px;
}
.news-date-block {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  background: #F3F4F6;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.news-day {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.news-month {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.2;
}
.news-body {
  flex: 1;
}
.news-body h3 {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
  margin-bottom: 6px;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  transition: color .2s ease;
}
.news-item:hover .news-body h3 {
  color: var(--primary);
}
.news-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  margin-bottom: 8px;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
}
.news-cat {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: var(--radius-tag);
  padding: 4px 10px;
}
.news-more {
  font-size: 13px;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color .2s ease;
}
.news-item:hover .news-more {
  color: var(--primary);
}
.news-empty {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-secondary);
  font-size: 15px;
  background: #fff;
  border-radius: 12px;
  border: 1px dashed var(--border);
}

/* ===== FAQ ===== */
.faq-section {
  background: #fff;
}
.faq-grid {
  max-width: 820px;
  margin: 0 auto;
}
.accordion {
  background: transparent;
}
.accordion-item {
  margin-bottom: 16px;
  background: #F8FAFC;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: background .2s ease, box-shadow .2s ease;
}
.accordion-item.is-active {
  background: #fff;
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}
.accordion-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  padding: 18px 24px;
  min-height: auto;
  border: none;
  position: relative;
  border-radius: 12px;
}
.accordion-title:hover,
.accordion-title:focus {
  background: transparent;
  color: var(--text);
}
.accordion-title::after {
  content: '+';
  font-size: 22px;
  font-weight: 400;
  color: var(--primary);
  transition: transform .2s ease;
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  line-height: 1;
  background: transparent;
  border: none;
}
.accordion-item.is-active .accordion-title::after {
  transform: translateY(-50%) rotate(45deg);
}
.accordion-content {
  padding: 0 24px 20px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}
.accordion-content p {
  margin-bottom: 0;
  line-height: 1.7;
}

/* ===== Contact ===== */
.contact-section {
  background: var(--primary-light);
  padding: 88px 0;
}
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: stretch;
}
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.contact-card {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.contact-card .contact-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-card h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}
.contact-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.contact-form-wrap {
  background: #fff;
  border-radius: 12px;
  padding: 32px;
  box-shadow: var(--shadow-md);
}
.contact-form-wrap h3 {
  font-size: 20px;
  margin-bottom: 24px;
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 8px;
}
.form-control {
  display: block;
  width: 100%;
  background: #F3F4F6;
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 15px;
  font-family: var(--font-family);
  color: var(--text);
  transition: background .2s ease, border-color .2s ease, box-shadow .2s ease;
  box-shadow: none;
}
.form-control:focus {
  background: #fff;
  border-bottom-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(59,130,246,.15);
  outline: none;
}
textarea.form-control {
  min-height: 100px;
  resize: vertical;
}

/* ===== Footer ===== */
.footer {
  background: #111827;
  color: rgba(255,255,255,.7);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand svg {
  width: 28px;
  height: 28px;
  color: var(--primary);
}
.footer-brand span {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  max-width: 320px;
}
.footer h4 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 16px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,.7);
  transition: color .2s ease;
}
.footer-links a:hover {
  color: #fff;
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 14px;
}
.footer-contact .fc-item {
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.15);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom .brand-copy {
  color: rgba(255,255,255,.9);
  font-weight: 500;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
    box-shadow: 0 0 40px rgba(0,0,0,.15);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-wrapper {
    margin-left: 0;
  }
  .mobile-header {
    position: sticky;
    top: 0;
    z-index: 900;
    background: #fff;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    border-bottom: 1px solid var(--border);
  }
  .menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    padding: 0;
  }
  .menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform .3s ease, opacity .3s ease;
  }
  .menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
  .mobile-logo {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
  }
  .mobile-header .header-link {
    font-size: 13px;
    color: var(--primary);
    background: var(--primary-light);
    border-radius: 50px;
    padding: 6px 14px;
    font-weight: 500;
  }
  .overlay {
    position: fixed;
    inset: 0;
    background: rgba(17,24,39,.4);
    z-index: 950;
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s ease;
  }
  .overlay.show {
    opacity: 1;
    pointer-events: auto;
  }
}

@media (max-width: 900px) {
  .container {
    padding: 0 20px;
  }
  .hero-grid {
    flex-direction: column;
    gap: 40px;
  }
  .hero-text h1 {
    font-size: 36px;
  }
  .hero-media img {
    height: 280px;
  }
  .services-grid {
    grid-template-columns: 1fr 1fr;
  }
  .service-card.featured {
    grid-column: span 2;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .stat-item:not(:last-child)::after {
    display: none;
  }
  .cases-layout {
    grid-template-columns: 1fr;
  }
  .solutions-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .contact-layout {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .hero-section {
    padding: 56px 0 48px;
  }
  .hero-text h1 {
    font-size: 30px;
  }
  .hero-subtitle {
    font-size: 15px;
  }
  .hero-cta .btn {
    width: 100%;
  }
  .hero-media img {
    height: 220px;
  }
  .section {
    padding: 56px 0;
  }
  .services-grid {
    grid-template-columns: 1fr;
  }
  .service-card.featured {
    grid-column: auto;
    grid-row: auto;
  }
  .stats-grid {
    gap: 16px;
  }
  .stat-number {
    font-size: 40px;
  }
  .stat-number .suffix {
    font-size: 22px;
  }
  .case-thumb {
    width: 80px;
    height: 60px;
  }
  .case-info h3 {
    font-size: 14px;
  }
  .flow-card {
    padding: 24px;
  }
  .news-item {
    gap: 14px;
  }
  .news-date-block {
    width: 48px;
    height: 48px;
  }
  .news-day {
    font-size: 18px;
  }
  .news-meta {
    gap: 10px;
  }
  .contact-section {
    padding: 56px 0;
  }
  .contact-form-wrap {
    padding: 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .section-title {
    font-size: 26px;
  }
}

/* roulang page: article */
/* ========== 设计变量 ========== */
        :root {
            --primary: #2E7CF6;
            --primary-dark: #1E6AE0;
            --primary-light: #F0F5FF;
            --accent: #F59E0B;
            --bg: #F6F8FB;
            --card-bg: #FFFFFF;
            --text: #1F2937;
            --text-secondary: #6B7280;
            --border: #E5E7EB;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 4px 12px rgba(16, 24, 40, .06);
            --shadow-hover: 0 8px 24px rgba(16, 24, 40, .1);
            --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --sidebar-width: 260px;
            --content-max: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease, background .2s ease, box-shadow .2s ease, border-color .2s ease, opacity .2s ease;
        }

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

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

        ul, ol {
            list-style-position: inside;
        }

        input, textarea, select {
            font-family: inherit;
            font-size: 1rem;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: none;
            box-shadow: 0 0 0 4px rgba(59, 130, 246, .15);
        }

        /* ========== 通用容器与按钮 ========== */
        .container {
            max-width: var(--content-max);
            margin: 0 auto;
            padding: 0 32px;
        }

        .btn-primary,
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            transition: all .2s ease;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border: 1px solid var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            box-shadow: 0 6px 20px rgba(46, 124, 246, .28);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: scale(.98);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .btn-outline:hover {
            background: rgba(46, 124, 246, .06);
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: scale(.98);
        }

        .btn-lg {
            padding: 16px 36px;
            font-size: 16px;
        }

        /* ========== 侧边栏导航 ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--card-bg);
            border-right: 1px solid var(--border);
            z-index: 200;
            display: flex;
            flex-direction: column;
            padding: 0;
        }

        .sidebar-brand {
            height: 64px;
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0 24px;
            border-bottom: 1px solid var(--border);
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: .5px;
            white-space: nowrap;
        }

        .sidebar-brand svg {
            flex-shrink: 0;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            padding: 20px 12px;
            gap: 4px;
            flex: 1;
        }

        .sidebar-nav .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-left: 4px solid transparent;
            transition: background .2s ease, color .2s ease, border-color .2s ease;
        }

        .sidebar-nav .nav-item svg {
            width: 18px;
            height: 18px;
            flex-shrink: 0;
        }

        .sidebar-nav .nav-item:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .sidebar-nav .nav-item.active {
            background: var(--primary-light);
            color: var(--primary);
            border-left-color: var(--primary);
            font-weight: 600;
        }

        .sidebar-bottom {
            padding: 16px 24px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-secondary);
        }

        /* ========== 移动端导航 ========== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            left: 0;
            width: 100%;
            height: 64px;
            background: var(--card-bg);
            border-bottom: 1px solid var(--border);
            z-index: 300;
            align-items: center;
            padding: 0 20px;
            gap: 12px;
        }

        .mobile-toggle {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
        }
        .mobile-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: transform .25s ease, opacity .25s ease;
        }
        .mobile-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .mobile-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-brand {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            width: 100%;
            background: var(--card-bg);
            padding: 16px 20px;
            box-shadow: var(--shadow-hover);
            z-index: 290;
            flex-direction: column;
            gap: 4px;
        }

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

        .mobile-menu a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 14px 12px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .mobile-menu a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .mobile-menu a.active {
            background: var(--primary-light);
            color: var(--primary);
            border-left: 4px solid var(--primary);
            font-weight: 600;
        }

        /* ========== 主内容区 ========== */
        .main-wrap {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .page-content {
            flex: 1;
            padding: 48px 40px 80px;
            max-width: 100%;
        }

        /* ========== 面包屑 ========== */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 36px;
            max-width: 100%;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color .2s ease;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .sep {
            color: #C0C8D0;
            user-select: none;
        }

        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
            max-width: 320px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ========== 文章标题区 ========== */
        .article-header {
            max-width: 900px;
            margin: 0 auto 40px;
            text-align: left;
            padding-bottom: 32px;
            border-bottom: 1px solid var(--border);
        }

        .article-title {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -.5px;
            color: var(--text);
            margin-bottom: 20px;
            word-break: break-word;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 13px;
            color: var(--text-secondary);
        }

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

        .meta-item svg {
            width: 14px;
            height: 14px;
            color: #9CA3AF;
        }

        .meta-item .meta-divider {
            color: var(--border);
        }

        .category-badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 6px;
            margin-left: 4px;
        }

        /* ========== 正文阅读区 ========== */
        .article-content {
            max-width: 900px;
            margin: 0 auto;
        }

        .article-body {
            max-width: 760px;
            margin: 0 auto;
            font-size: 17px;
            line-height: 1.8;
            color: #333F4E;
        }

        .article-body p {
            margin-bottom: 24px;
            font-size: 16px;
            line-height: 1.8;
        }

        .article-body h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin: 48px 0 20px;
            line-height: 1.4;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--border);
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            margin: 36px 0 16px;
            line-height: 1.5;
        }

        .article-body h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin: 28px 0 12px;
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 24px;
            padding-left: 24px;
            font-size: 16px;
            line-height: 1.8;
        }

        .article-body li {
            margin-bottom: 8px;
        }

        .article-body ul li::marker {
            color: var(--primary);
        }

        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: #F3F6FA;
            padding: 20px 24px;
            margin: 32px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }

        .article-body blockquote p {
            margin-bottom: 8px;
        }

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

        .article-body img {
            border-radius: var(--radius);
            border: 1px solid var(--border);
            margin: 32px auto;
        }

        .article-body a {
            color: var(--primary);
            font-weight: 500;
            border-bottom: 1px solid rgba(46, 124, 246, .3);
            transition: border-color .2s ease, color .2s ease;
        }
        .article-body a:hover {
            color: var(--primary-dark);
            border-bottom-color: var(--primary);
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 32px 0;
            font-size: 14px;
            background: var(--card-bg);
            border-radius: var(--radius-sm);
            overflow: hidden;
        }

        .article-body th {
            background: var(--primary-light);
            color: var(--text);
            font-weight: 600;
            text-align: left;
            padding: 12px 16px;
            border-bottom: 1px solid var(--border);
        }

        .article-body td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border);
            color: var(--text-secondary);
        }

        .article-body pre {
            background: #F1F4F8;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            font-size: 14px;
            line-height: 1.6;
            margin: 24px 0;
            border: 1px solid var(--border);
        }

        .article-body code {
            background: #F1F4F8;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 14px;
            color: #D94F4F;
        }

        .article-body pre code {
            background: none;
            padding: 0;
            color: #333F4E;
        }

        .article-caption {
            text-align: center;
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: -24px;
            margin-bottom: 32px;
        }

        /* ========== 空态 ========== */
        .empty-state {
            max-width: 760px;
            margin: 80px auto;
            text-align: center;
            padding: 80px 40px;
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }

        .empty-state svg {
            width: 56px;
            height: 56px;
            color: #CBD5E1;
            margin-bottom: 20px;
        }

        .empty-state p {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .empty-state .btn-outline {
            margin-top: 8px;
        }

        /* ========== 上一篇 / 下一篇 ========== */
        .article-pager {
            max-width: 900px;
            margin: 48px auto 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            border-top: 1px solid var(--border);
            padding-top: 40px;
        }

        .pager-item {
            display: flex;
            flex-direction: column;
            padding: 20px 24px;
            background: var(--card-bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
        }

        .pager-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .pager-item.next {
            text-align: right;
        }

        .pager-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 8px;
        }

        .pager-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
        }

        /* ========== 相关推荐 ========== */
        .related-section {
            max-width: 900px;
            margin: 64px auto 0;
            padding-top: 48px;
            border-top: 1px solid var(--border);
        }

        .related-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 28px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .related-header h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
        }

        .related-link {
            font-size: 14px;
            color: var(--primary);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

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

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

        .related-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border);
            transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .related-tag {
            display: inline-flex;
            align-items: center;
            align-self: flex-start;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 6px;
        }

        .related-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
        }

        .related-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .related-card .card-link-arrow {
            font-size: 14px;
            color: var(--primary);
            font-weight: 500;
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ========== 联系 CTA ========== */
        .cta-section {
            max-width: 900px;
            margin: 64px auto 0;
        }

        .cta-box {
            background: linear-gradient(135deg, #F0F5FF 0%, #FFFFFF 60%, #FDF6E9 100%);
            border-radius: var(--radius);
            padding: 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }

        .cta-info {
            flex: 1;
            min-width: 260px;
        }

        .cta-info h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }

        .cta-info p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 460px;
        }

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

        /* ========== 页脚 ========== */
        .footer {
            background: #111827;
            color: rgba(255, 255, 255, .7);
            padding: 64px 0 32px;
            margin-left: var(--sidebar-width);
        }

        .footer .container {
            max-width: calc(var(--content-max) - var(--sidebar-width));
        }

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

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, .6);
            max-width: 300px;
        }

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

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

        .footer-links a {
            color: rgba(255, 255, 255, .6);
            font-size: 14px;
            transition: color .2s ease;
        }
        .footer-links a:hover {
            color: #fff;
        }

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

        .fc-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
        }

        .fc-item svg {
            flex-shrink: 0;
        }

        .footer-bottom {
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, .1);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 14px;
            color: rgba(255, 255, 255, .4);
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ========== 响应式 ========== */

        /* 1024px 以下：隐藏侧边栏，切换顶部导航 */
        @media (max-width: 1024px) {
            .sidebar {
                display: none;
            }

            .mobile-header {
                display: flex;
            }

            .mobile-menu {
                display: none;
            }

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

            .main-wrap {
                margin-left: 0;
            }

            .footer {
                margin-left: 0;
            }

            .footer .container {
                max-width: var(--content-max);
                padding: 0 24px;
            }

            .page-content {
                padding: 36px 24px 64px;
            }

            .article-title {
                font-size: 32px;
            }

            .cta-box {
                padding: 36px 28px;
            }
        }

        /* 768px 以下：平板竖屏 */
        @media (max-width: 768px) {
            .page-content {
                padding: 28px 20px 48px;
            }

            .breadcrumb {
                margin-bottom: 24px;
                font-size: 12px;
            }

            .article-header {
                margin-bottom: 28px;
                padding-bottom: 24px;
            }

            .article-title {
                font-size: 28px;
                margin-bottom: 16px;
            }

            .article-meta {
                gap: 14px;
            }

            .article-body {
                font-size: 16px;
                line-height: 1.75;
            }

            .article-body p {
                font-size: 15px;
            }

            .article-pager {
                grid-template-columns: 1fr;
                gap: 12px;
                padding-top: 32px;
            }

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

            .cta-box {
                flex-direction: column;
                padding: 32px 24px;
                text-align: center;
            }

            .cta-info p {
                margin: 0 auto;
            }

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

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

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

        /* 640px 以下：手机端 */
        @media (max-width: 640px) {
            .mobile-header {
                padding: 0 16px;
            }

            .mobile-brand {
                font-size: 15px;
            }

            .page-content {
                padding: 20px 16px 40px;
            }

            .breadcrumb {
                gap: 4px;
                margin-bottom: 20px;
            }

            .breadcrumb .current {
                max-width: 180px;
            }

            .container {
                padding: 0 16px;
            }

            .article-title {
                font-size: 24px;
                letter-spacing: 0;
            }

            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }

            .article-body {
                font-size: 15px;
            }

            .article-body h2 {
                font-size: 22px;
            }

            .article-body h3 {
                font-size: 18px;
            }

            .article-body blockquote {
                padding: 16px 18px;
                font-size: 14px;
            }

            .related-section {
                margin-top: 48px;
                padding-top: 36px;
            }

            .related-header h2 {
                font-size: 20px;
            }

            .related-card {
                padding: 22px 18px;
            }

            .cta-box {
                padding: 28px 20px;
            }

            .cta-info h3 {
                font-size: 19px;
            }

            .cta-actions .btn-primary,
            .cta-actions .btn-outline {
                width: 100%;
                justify-content: center;
            }

            .footer {
                padding: 48px 0 24px;
            }

            .footer-grid {
                gap: 24px;
            }

            .footer .container {
                padding: 0 20px;
            }
        }

        /* 避免横向滚动 */
        html,
        body {
            max-width: 100%;
            overflow-x: hidden;
        }

/* roulang page: category1 */
:root {
  --primary: #2E7CF6;
  --primary-dark: #1C5ED8;
  --primary-soft: #F0F5FF;
  --accent: #F59E0B;
  --accent-soft: #FFF8EB;
  --bg: #F6F8FB;
  --card: #FFFFFF;
  --text: #1F2937;
  --text-sub: #6B7280;
  --border: #E5E7EB;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-tag: 6px;
  --shadow: 0 1px 2px rgba(16,24,40,.04), 0 4px 12px rgba(16,24,40,.06);
  --shadow-hover: 0 8px 24px rgba(16,24,40,.10);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.7; font-size: 16px; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; }

.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 260px;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  background: var(--card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  padding: 0 20px;
}
.sidebar .brand {
  height: 64px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  white-space: nowrap;
}
.sidebar-nav { flex: 1; padding: 24px 0; display: flex; flex-direction: column; gap: 6px; }
.sidebar-nav .nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--text-sub);
  transition: background .2s, color .2s;
  border-left: 4px solid transparent;
}
.sidebar-nav .nav-item:hover { background: var(--primary-soft); color: var(--primary); }
.sidebar-nav .nav-item.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; border-left-color: var(--primary); }
.sidebar-foot { padding: 16px 0; font-size: 12px; color: #9CA3AF; border-top: 1px solid var(--border); }

.main { margin-left: 260px; flex: 1; min-width: 0; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }
.section { padding: 80px 0; }

.section-head { margin-bottom: 48px; }
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 6px 14px;
  border-radius: 999px;
  letter-spacing: 1px;
}
.section-title { font-size: 32px; font-weight: 700; margin-top: 16px; letter-spacing: -0.5px; line-height: 1.3; }
.section-desc { font-size: 16px; color: var(--text-sub); margin-top: 12px; max-width: 640px; line-height: 1.6; }

.hero-band {
  background: linear-gradient(135deg, #F0F5FF 0%, #FFFFFF 60%);
  padding: 88px 0;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.hero-band .hero-deco { position: absolute; width: 180px; height: 180px; border-radius: 50%; background: rgba(245,158,11,.12); top: -40px; right: 10%; z-index: 0; }
.hero-band .hero-deco2 { position: absolute; width: 120px; height: 120px; border-radius: 50%; background: rgba(46,124,246,.07); bottom: -30px; left: 40%; z-index: 0; }
.hero-band .hero-grid { display: flex; align-items: center; gap: 64px; position: relative; z-index: 1; }
.hero-band .hero-text { flex: 1.1; max-width: 560px; }
.hero-band .hero-text h1 { font-size: 44px; font-weight: 700; letter-spacing: -0.5px; line-height: 1.25; }
.hero-band .hero-text .hero-sub { font-size: 18px; color: var(--text-sub); margin-top: 16px; line-height: 1.6; }
.hero-band .hero-text .hero-desc { font-size: 15px; color: var(--text-sub); margin-top: 12px; line-height: 1.7; max-width: 500px; }
.hero-media { flex: 1; position: relative; }
.hero-media img { border-radius: var(--radius); box-shadow: var(--shadow); width: 100%; height: 320px; object-fit: cover; }
.hero-media::after { content: ""; position: absolute; top: 20px; right: -20px; width: 100%; height: 100%; border-radius: var(--radius); background: rgba(245,158,11,.08); z-index: -1; }

.info-section { background: var(--bg); }
.info-layout { display: grid; grid-template-columns: 1.2fr 1fr; gap: 24px; align-items: stretch; }
.info-col { display: grid; grid-template-columns: 1fr; gap: 24px; }
.info-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform .2s, box-shadow .2s;
  position: relative;
}
.info-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.info-card.featured {
  background: linear-gradient(160deg, #FFFFFF, #F0F5FF);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.info-card .icon {
  width: 40px; height: 40px;
  background: var(--primary-soft);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--primary);
}
.info-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.info-card p { font-size: 14px; color: var(--text-sub); line-height: 1.6; }
.info-card .more { display: inline-flex; align-items: center; gap: 4px; font-size: 14px; color: var(--primary); margin-top: 16px; font-weight: 500; transition: gap .2s; }
.info-card .more:hover { gap: 8px; }

.topic-section { background: var(--card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.topic-feature {
  display: flex;
  gap: 48px;
  align-items: center;
  background: #FBFBFC;
  border-radius: var(--radius);
  padding: 40px;
  border: 1px solid var(--border);
}
.topic-feature .tf-media { flex: 1; }
.topic-feature .tf-media img { border-radius: var(--radius); width: 100%; height: 300px; object-fit: cover; box-shadow: var(--shadow); }
.topic-feature .tf-body { flex: 1; }
.tf-list { list-style: none; margin-top: 24px; }
.tf-list li { display: flex; gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--border); align-items: flex-start; }
.tf-list li:last-child { border-bottom: none; }
.tf-list .dot { width: 20px; height: 20px; border-radius: 50%; background: var(--accent); color: #fff; font-size: 12px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 4px; }
.tf-list strong { font-size: 16px; font-weight: 600; }
.tf-list p { font-size: 14px; color: var(--text-sub); line-height: 1.6; }

.scene-section { background: var(--primary-soft); }
.scene-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.scene-item {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow .2s, transform .2s;
}
.scene-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.scene-item .scene-media { aspect-ratio: 16/9; overflow: hidden; }
.scene-item .scene-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.scene-item:hover .scene-media img { transform: scale(1.02); }
.scene-item .scene-body { padding: 24px 28px; }
.scene-item h3 { font-size: 18px; font-weight: 600; }
.scene-item p { font-size: 14px; color: var(--text-sub); margin-top: 8px; line-height: 1.6; }

.links-section { background: var(--card); }
.links-band { background: var(--primary-soft); border-radius: var(--radius); padding: 48px; text-align: center; border: 1px solid var(--border); }
.links-band h2 { font-size: 28px; font-weight: 700; }
.links-band p { font-size: 15px; color: var(--text-sub); margin-top: 8px; }
.link-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-top: 24px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  transition: all .2s;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); box-shadow: 0 4px 12px rgba(46,124,246,.3); transform: translateY(-2px); }
.btn-primary:active { transform: scale(.98); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: rgba(59,130,246,.05); transform: translateY(-2px); }
.btn-outline:active { transform: scale(.98); }
.btn:focus, a:focus, input:focus, textarea:focus { box-shadow: 0 0 0 4px rgba(59,130,246,.15); outline: none; }

.faq-section { background: var(--bg); }
.faq-list { max-width: 800px; }
.faq-item { background: #F3F4F6; border-radius: var(--radius); margin-bottom: 16px; overflow: hidden; transition: background .2s, box-shadow .2s; }
.faq-item.open { background: #fff; box-shadow: var(--shadow); }
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  gap: 12px;
  color: var(--text);
}
.faq-q .plus {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  transition: transform .2s;
  flex-shrink: 0;
  line-height: 1;
}
.faq-item.open .plus { transform: rotate(45deg); }
.faq-a { padding: 0 24px 20px; font-size: 14px; color: var(--text-sub); line-height: 1.7; display: none; }
.faq-item.open .faq-a { display: block; }

.cta-section { background: var(--card); padding-bottom: 80px; }
.cta-band {
  background: var(--accent-soft);
  border-radius: var(--radius);
  padding: 56px 40px;
  text-align: center;
  border: 1px solid rgba(245,158,11,.2);
}
.cta-band h2 { font-size: 28px; font-weight: 700; }
.cta-band p { font-size: 15px; color: var(--text-sub); margin-top: 8px; max-width: 480px; margin-left: auto; margin-right: auto; }
.cta-band .link-buttons { margin-top: 24px; }
.back-home-line { text-align: center; margin-top: 32px; }
.back-home-line a { color: var(--primary); font-size: 14px; font-weight: 500; border-bottom: 1px solid transparent; transition: border-color .2s; }
.back-home-line a:hover { border-color: var(--primary); }

.footer { background: #111827; color: rgba(255,255,255,.7); padding: 64px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; color: #fff; }
.footer-desc { font-size: 14px; margin-top: 12px; max-width: 320px; line-height: 1.6; }
.footer h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 16px; }
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,.7); transition: color .2s; }
.footer-links a:hover { color: #fff; }
.footer-contact { display: flex; flex-direction: column; gap: 10px; }
.fc-item { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 48px; padding-top: 24px; display: flex; justify-content: space-between; font-size: 13px; color: rgba(255,255,255,.5); }
.brand-copy { color: rgba(255,255,255,.7); }

.mobile-header { display: none; }
.mobile-drawer { display: none; }

@media (max-width: 1024px) {
  .sidebar { display: none; }
  .main { margin-left: 0; }
  .mobile-header {
    display: flex;
    height: 64px;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 300;
  }
  .mobile-header .brand { font-size: 17px; font-weight: 700; display: flex; align-items: center; gap: 8px; white-space: nowrap; }
  .menu-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
  }
  .mobile-cta { background: var(--primary); color: #fff; border-radius: var(--radius-sm); padding: 8px 16px; font-size: 14px; font-weight: 500; }
  .mobile-cta:hover { background: var(--primary-dark); }
  .mobile-drawer {
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: var(--card);
    box-shadow: 0 8px 24px rgba(16,24,40,.08);
    padding: 16px;
    z-index: 299;
    display: none;
  }
  .mobile-drawer.open { display: block; }
  .mobile-drawer .nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    font-size: 16px;
    color: var(--text-sub);
  }
  .mobile-drawer .nav-item:hover { background: var(--primary-soft); color: var(--primary); }
  .mobile-drawer .nav-item.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }

  .container { padding: 0 20px; }
  .hero-band { padding: 56px 0; }
  .hero-band .hero-grid { flex-direction: column; gap: 32px; }
  .hero-band .hero-text { max-width: 100%; }
  .hero-band .hero-text h1 { font-size: 34px; }
  .hero-media img { height: 260px; }
  .info-layout { grid-template-columns: 1fr; }
  .topic-feature { flex-direction: column; padding: 32px; }
  .scene-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 64px 0; }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .section { padding: 48px 0; }
  .hero-band { padding: 40px 0; }
  .hero-band .hero-text h1 { font-size: 30px; }
  .hero-band .hero-text .hero-sub { font-size: 16px; }
  .hero-band .hero-text .hero-desc { font-size: 14px; }
  .hero-media img { height: 200px; }
  .hero-media::after { display: none; }
  .section-title { font-size: 26px; }
  .section-head { margin-bottom: 32px; }
  .info-card { padding: 20px; }
  .topic-feature { padding: 24px; }
  .topic-feature .tf-media img { height: 200px; }
  .scene-item .scene-body { padding: 20px; }
  .links-band { padding: 32px 20px; }
  .cta-band { padding: 32px 20px; }
  .btn { width: 100%; justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; align-items: center; text-align: center; }
  .faq-q { font-size: 15px; padding: 16px 18px; }
  .faq-a { padding: 0 18px 16px; }
}