/* roulang page: index */
:root {
  --primary: #2B6CB0;
  --primary-dark: #1D4F87;
  --primary-darker: #153D6B;
  --teal: #0EA5A4;
  --orange: #F59E0B;
  --bg: #F7F9FC;
  --bg-white: #FFFFFF;
  --text: #1A202C;
  --text-weak: #718096;
  --border: #E2E8F0;
  --radius-card: 16px;
  --radius-btn: 10px;
  --shadow-card: 0 8px 30px rgba(15, 40, 80, 0.06);
  --shadow-card-hover: 0 14px 40px rgba(15, 40, 80, 0.10);
  --container: 1200px;
  --space-section: 100px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

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

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

/* Header 导航 */
.site-header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 16px rgba(15, 40, 80, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 16px;
}

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

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.logo-text span {
  color: var(--primary);
}

.nav-chips {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding: 4px 0;
}

.nav-chips::-webkit-scrollbar {
  display: none;
}

.chip-link {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 18px;
  border-radius: 999px;
  background: #EDF2F7;
  color: #2D3748;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  transition: all 0.2s ease;
  position: relative;
}

.chip-link:hover {
  background: #E2E8F0;
  color: var(--primary);
}

.chip-link.active {
  background: #E3EDF8;
  color: #1A56A8;
}

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

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 22px;
  border-radius: var(--radius-btn);
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.25s ease;
  flex-shrink: 0;
}

.header-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(43, 108, 176, 0.3);
}

.header-cta:active {
  background: var(--primary-darker);
  transform: translateY(0);
}

.header-cta:focus-visible {
  outline: 3px solid rgba(43, 108, 176, 0.3);
  outline-offset: 2px;
}

.header-cta .fa-arrow-right {
  font-size: 13px;
}

/* Hero */
.hero-section {
  background: linear-gradient(135deg, #F0F6FC 0%, #E8F0FA 60%, #DCE8F5 100%);
  padding: 90px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(rgba(43, 108, 176, 0.08) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(43, 108, 176, 0.15);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 24px;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--teal);
  border-radius: 50%;
  display: inline-block;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-title {
  font-size: 44px;
  line-height: 1.25;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 1px;
  margin-bottom: 18px;
}

.hero-title .accent {
  color: var(--primary);
}

.hero-subtitle {
  font-size: 17px;
  color: #4A5568;
  line-height: 1.75;
  max-width: 520px;
  margin-bottom: 36px;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 48px;
  padding: 0 30px;
  border-radius: var(--radius-btn);
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.25s ease;
  box-shadow: 0 4px 20px rgba(43, 108, 176, 0.25);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(43, 108, 176, 0.3);
}

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

.btn-primary:focus-visible {
  outline: 3px solid rgba(43, 108, 176, 0.3);
  outline-offset: 2px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  background: #fff;
  border: 1px solid var(--primary);
  color: var(--primary);
  font-size: 15px;
  font-weight: 500;
  transition: all 0.25s ease;
}

.btn-secondary:hover {
  background: #F0F7FF;
  transform: translateY(-1px);
}

.btn-secondary:active {
  background: #DFECFA;
}

.btn-secondary:focus-visible {
  outline: 3px solid rgba(43, 108, 176, 0.2);
  outline-offset: 2px;
}

.hero-stats {
  display: flex;
  gap: 36px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.stat-item .stat-num {
  font-size: 26px;
  font-weight: 800;
  color: var(--text);
}

.stat-item .stat-label {
  font-size: 13px;
  color: var(--text-weak);
  margin-top: 2px;
}

.hero-visual {
  position: relative;
}

.hero-visual img {
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(15, 40, 80, 0.14);
  width: 100%;
  height: auto;
}

.hero-visual .float-card {
  position: absolute;
  bottom: -18px;
  left: -24px;
  background: #fff;
  border-radius: 12px;
  padding: 14px 18px;
  box-shadow: var(--shadow-card-hover);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
}

.hero-visual .float-card i {
  color: var(--teal);
  font-size: 18px;
}

/* Section 通用 */
.section {
  padding: var(--space-section) 0;
}

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

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-header .section-tag {
  display: inline-block;
  background: #E3EDF8;
  color: var(--primary);
  border-radius: 999px;
  padding: 5px 16px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 14px;
}

.section-header h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 14px;
  line-height: 1.3;
}

.section-header p {
  color: var(--text-weak);
  font-size: 16px;
  line-height: 1.7;
}

/* 卖点区 */
.features-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: center;
}

.features-left {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.feature-row {
  display: flex;
  gap: 18px;
  padding: 20px 24px;
  background: #edf2f7;
  border-radius: var(--radius-card);
  transition: all 0.25s ease;
  cursor: default;
}

.feature-row:hover {
  background: #e3edf8;
  box-shadow: var(--shadow-card);
  transform: translateY(-4px);
}

.feature-num {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-row .feature-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.feature-row .feature-desc {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.6;
}

.features-right {
  position: relative;
}

.features-right img {
  border-radius: 20px;
  box-shadow: var(--shadow-card-hover);
  width: 100%;
  height: auto;
}

.band-full {
  margin-top: 48px;
  background: linear-gradient(90deg, #E3EDF8, #F0F6FC);
  border-radius: var(--radius-card);
  padding: 28px 36px;
  display: flex;
  align-items: center;
  gap: 20px;
  border-left: 4px solid var(--primary);
}

.band-full i {
  font-size: 28px;
  color: var(--primary);
}

.band-full .band-text {
  font-size: 15px;
  color: #2D3748;
  font-weight: 500;
}

/* 分类浏览区 */
.category-row {
  display: flex;
  align-items: center;
  gap: 28px;
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 28px 32px;
  margin-bottom: 20px;
  transition: all 0.25s ease;
  border: 1px solid transparent;
}

.category-row:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
  border-color: #D5E9FA;
}

.category-row .cat-icon {
  flex-shrink: 0;
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: #E3EDF8;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--primary);
}

.category-row .cat-body {
  flex: 1;
}

.category-row .cat-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.category-row .cat-desc {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.6;
}

.btn-go {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 999px;
  background: #EDF2F7;
  color: #2D3748;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.25s ease;
  white-space: nowrap;
}

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

.btn-go:active {
  background: var(--primary-dark);
}

/* 资讯列表 */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 16px;
  transition: all 0.3s ease;
}

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

.news-thumb {
  flex-shrink: 0;
  width: 120px;
  height: 90px;
  border-radius: 12px;
  object-fit: cover;
  background: #EDF2F7;
}

.news-body {
  flex: 1;
  min-width: 0;
}

.news-cat {
  display: inline-block;
  background: rgba(14, 165, 164, 0.12);
  color: #0D7373;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 6px;
}

.news-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.2s;
}

.news-title:hover {
  color: var(--primary);
}

.news-excerpt {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 4px;
}

.news-meta {
  font-size: 12px;
  color: #A0AEC0;
  display: flex;
  align-items: center;
  gap: 12px;
}

.news-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s;
}

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

.empty-state {
  background: #fff;
  border: 1px dashed #CBD5E0;
  border-radius: var(--radius-card);
  padding: 60px 32px;
  text-align: center;
  color: var(--text-weak);
}

.empty-state .empty-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #EDF2F7;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #A0AEC0;
  margin-bottom: 16px;
}

/* 演示区 */
.demo-wrap {
  background: linear-gradient(135deg, #F8FAFC, #EDF2F7);
  border-radius: 20px;
  padding: 56px 48px;
  position: relative;
  overflow: hidden;
}

.demo-wrap::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(rgba(43, 108, 176, 0.06) 1px, transparent 1px);
  background-size: 18px 18px;
}

.demo-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
  z-index: 1;
}

.demo-step {
  text-align: center;
  padding: 28px 24px;
}

.demo-step .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  box-shadow: 0 6px 16px rgba(43, 108, 176, 0.3);
}

.demo-step .step-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.demo-step .step-desc {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.6;
}

.demo-img {
  margin-top: 40px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-card-hover);
  position: relative;
  z-index: 1;
}

.demo-img img {
  width: 100%;
  height: auto;
}

/* 证据区 */
.evidence-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.evidence-num-item {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 28px;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.evidence-num-item .num {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
}

.evidence-num-item .label {
  font-size: 14px;
  color: var(--text-weak);
  margin-top: 6px;
}

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

.quote-block {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 32px;
  box-shadow: var(--shadow-card);
  border-left: 3px solid var(--teal);
}

.quote-block .quote-text {
  font-size: 15px;
  line-height: 1.7;
  color: #2D3748;
  margin-bottom: 16px;
}

.quote-block .quote-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.quote-block .quote-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #E3EDF8;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 16px;
  overflow: hidden;
}

.quote-block .quote-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.quote-block .quote-time {
  font-size: 12px;
  color: #A0AEC0;
}

/* 价格区 */
.pricing-wrap {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  padding-top: 40px;
}

.price-card {
  background: #fff;
  border-radius: 20px;
  box-shadow: var(--shadow-card);
  padding: 36px 32px;
  width: 320px;
  transition: all 0.3s ease;
  position: relative;
}

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

.price-card.middle {
  background: linear-gradient(180deg, #FFFFFF, #F0F6FC);
  transform: scale(1.03);
  z-index: 2;
  margin-top: -20px;
  border: 2px solid var(--primary);
  box-shadow: 0 20px 50px rgba(43, 108, 176, 0.16);
}

.price-card.middle:hover {
  transform: scale(1.03) translateY(-6px);
}

.price-card .badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 16px;
  border-radius: 999px;
  white-space: nowrap;
}

.price-card .plan-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  text-align: center;
}

.price-card .plan-price {
  text-align: center;
  font-size: 42px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

.price-card .plan-unit {
  text-align: center;
  font-size: 14px;
  color: var(--text-weak);
  margin-bottom: 24px;
}

.price-features {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
}

.price-features li {
  padding: 8px 0;
  font-size: 14px;
  color: #2D3748;
  border-bottom: 1px solid #F2F5F9;
  display: flex;
  align-items: center;
  gap: 8px;
}

.price-features li i {
  color: var(--teal);
  font-size: 13px;
  width: 18px;
  text-align: center;
}

.price-card .btn-price {
  display: block;
  width: 100%;
  height: 44px;
  border-radius: var(--radius-btn);
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.25s ease;
}

.price-card .btn-price:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.price-card.middle .btn-price {
  background: var(--primary-dark);
}

.price-card.middle .btn-price:hover {
  background: var(--primary-darker);
}

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

.faq-item {
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--shadow-card);
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow 0.3s;
}

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

.faq-q {
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: color 0.2s;
}

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

.faq-q .faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #EDF2F7;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 400;
  color: var(--primary);
  transition: all 0.3s;
  flex-shrink: 0;
}

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

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-a-inner {
  padding: 0 28px 22px;
  font-size: 14px;
  color: #4A5568;
  line-height: 1.75;
  border-left: 3px solid var(--primary);
  margin-left: 28px;
  padding-left: 20px;
}

/* CTA 区域 */
.cta-banner {
  background: linear-gradient(90deg, #E3EDF8, #F0F6FC);
  border-radius: 20px;
  padding: 56px 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(rgba(43, 108, 176, 0.06) 1px, transparent 1px);
  background-size: 20px 20px;
}

.cta-banner h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  font-size: 16px;
  color: var(--text-weak);
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  position: relative;
  z-index: 1;
}

/* 页脚 */
.site-footer {
  background: #FBFCFE;
  border-top: 3px solid var(--primary);
  padding: 60px 0 28px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand .logo-text {
  font-size: 20px;
  margin-bottom: 12px;
}

.footer-brand .footer-desc {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
}

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

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

.footer-col ul a {
  font-size: 14px;
  color: var(--text-weak);
  transition: color 0.2s;
}

.footer-col ul a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: #A0AEC0;
}

/* 浮动 CTA */
.floating-cta {
  position: fixed;
  right: 30px;
  bottom: 30px;
  width: 56px;
  height: 56px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-card-hover);
  z-index: 99;
  transition: all 0.4s ease;
  border: none;
}

.floating-cta:hover {
  background: var(--primary-dark);
  transform: scale(1.08);
}

.floating-cta.reduced {
  opacity: 0.35;
  transform: scale(0.85);
}

.floating-cta.reduced:hover {
  opacity: 1;
  transform: scale(1);
}

.floating-cta .cta-arrow {
  position: absolute;
  right: 8px;
  top: 8px;
  font-size: 10px;
  opacity: 0.8;
}

/* 响应式 */
@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-visual {
    max-width: 560px;
  }

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

  .pricing-wrap {
    gap: 18px;
  }

  .price-card {
    width: 280px;
  }
}

@media (max-width: 768px) {
  :root {
    --space-section: 60px;
  }

  .header-inner {
    height: 60px;
    gap: 8px;
  }

  .logo-text {
    font-size: 16px;
  }

  .nav-chips {
    order: 3;
    width: 100%;
    margin-top: 4px;
    padding-bottom: 10px;
  }

  .header-inner {
    flex-wrap: wrap;
    height: auto;
    padding-top: 12px;
  }

  .header-cta {
    height: 38px;
    padding: 0 16px;
    font-size: 13px;
  }

  .header-cta .cta-text {
    display: none;
  }

  .hero-section {
    padding: 60px 0 70px;
  }

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

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

  .hero-stats {
    gap: 24px;
    margin-top: 32px;
  }

  .section-header h2 {
    font-size: 26px;
  }

  .demo-steps {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .evidence-band {
    grid-template-columns: 1fr;
    gap: 14px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .news-card {
    flex-direction: row;
  }

  .news-thumb {
    width: 100px;
    height: 80px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .hero-title {
    font-size: 26px;
  }

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

  .hero-actions .btn-primary,
  .hero-actions .btn-secondary {
    justify-content: center;
  }

  .category-row {
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
    gap: 14px;
  }

  .category-row .btn-go {
    width: 100%;
    justify-content: center;
  }

  .news-card {
    align-items: flex-start;
  }

  .news-thumb {
    width: 90px;
    height: 68px;
  }

  .news-title {
    font-size: 14px;
  }

  .news-excerpt {
    font-size: 13px;
  }

  .price-card {
    width: 100%;
    max-width: 340px;
  }

  .price-card.middle {
    margin-top: 0;
    transform: none;
  }

  .cta-banner {
    padding: 40px 24px;
  }

  .cta-banner h2 {
    font-size: 22px;
  }

  .floating-cta {
    right: 16px;
    bottom: 16px;
    width: 50px;
    height: 50px;
  }
}

/* roulang page: category1 */
:root {
      --primary: #2B6CB0;
      --primary-dark: #1D4F87;
      --primary-light: #E3EDF8;
      --accent: #0EA5A4;
      --accent-bg: #E6F7F7;
      --warning: #F59E0B;
      --warning-bg: #FEF3E2;
      --bg: #F7F9FC;
      --white: #FFFFFF;
      --text-main: #1A202C;
      --text-muted: #718096;
      --border-light: #E2E8F0;
      --radius-card: 16px;
      --radius-btn: 10px;
      --shadow-card: 0 8px 30px rgba(15, 40, 80, 0.06);
      --shadow-hover: 0 14px 40px rgba(15, 40, 80, 0.1);
      --container-width: 1200px;
      --space-section: 100px;
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
      background: var(--bg);
      color: var(--text-main);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; display: block; }
    a { text-decoration: none; color: inherit; transition: color 0.2s ease; }
    ul, ol { list-style: none; }
    .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

    /* Site Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 2px 16px rgba(15, 40, 80, 0.04);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 20px;
    }
    .logo-wrap {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .logo-icon {
      width: 40px;
      height: 40px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 12px;
      font-size: 18px;
      transition: background 0.2s ease;
    }
    .logo-wrap:hover .logo-icon { background: var(--primary); color: #fff; }
    .logo-text {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: 0.5px;
      white-space: nowrap;
    }
    .logo-text span { color: var(--primary); }
    .nav-chips {
      display: flex;
      align-items: center;
      gap: 8px;
      overflow-x: auto;
      scrollbar-width: none;
      -ms-overflow-style: none;
      flex: 1;
      justify-content: center;
      padding: 0 12px;
    }
    .nav-chips::-webkit-scrollbar { display: none; }
    .chip-link {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 36px;
      padding: 0 18px;
      border-radius: 999px;
      background: #EDF2F7;
      color: #2D3748;
      font-size: 14px;
      font-weight: 500;
      white-space: nowrap;
      transition: all 0.25s ease;
      border: 1px solid transparent;
    }
    .chip-link:hover {
      background: #E2E8F0;
      color: var(--primary-dark);
    }
    .chip-link:focus-visible {
      outline: 2px solid rgba(43, 108, 176, 0.4);
      outline-offset: 2px;
    }
    .chip-link.active {
      background: var(--primary-light);
      color: #1A56A8;
      position: relative;
      border-color: rgba(43, 108, 176, 0.12);
    }
    .chip-link.active::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 50%;
      transform: translateX(-50%);
      width: 4px;
      height: 4px;
      border-radius: 999px;
      background: var(--primary);
    }
    .header-cta {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      height: 42px;
      padding: 0 20px;
      border-radius: 10px;
      background: var(--primary);
      color: #fff;
      font-size: 14px;
      font-weight: 600;
      white-space: nowrap;
      flex-shrink: 0;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(43, 108, 176, 0.25);
      transition: all 0.25s ease;
    }
    .header-cta:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
      box-shadow: 0 8px 22px rgba(43, 108, 176, 0.3);
    }
    .header-cta:active { transform: translateY(0); background: #173F6D; }
    .header-cta:focus-visible {
      outline: 3px solid rgba(43, 108, 176, 0.35);
      outline-offset: 2px;
    }
    .header-cta i { font-size: 13px; }
    .cta-text { line-height: 1; }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 44px;
      padding: 0 24px;
      border-radius: 10px;
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      border: none;
      transition: all 0.25s ease;
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 4px 14px rgba(43, 108, 176, 0.22);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
      box-shadow: 0 8px 24px rgba(43, 108, 176, 0.28);
    }
    .btn-primary:active { transform: translateY(0); background: #173F6D; }
    .btn-primary:focus-visible {
      outline: 3px solid rgba(43, 108, 176, 0.3);
      outline-offset: 2px;
    }
    .btn-secondary {
      background: var(--white);
      color: var(--primary);
      border: 1px solid rgba(43, 108, 176, 0.4);
    }
    .btn-secondary:hover {
      background: #F0F7FF;
      border-color: var(--primary);
      transform: translateY(-1px);
    }
    .btn-secondary:active { background: #E3EDF8; transform: translateY(0); }
    .btn-secondary:focus-visible {
      outline: 3px solid rgba(43, 108, 176, 0.25);
      outline-offset: 2px;
    }
    .btn-sm { height: 38px; padding: 0 18px; font-size: 14px; }

    /* Hero */
    .hero-section {
      position: relative;
      padding: 80px 0 100px;
      background: linear-gradient(135deg, #F0F6FC 0%, #E3EDF8 50%, #F7F9FC 100%);
      overflow: hidden;
    }
    .hero-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.18;
    }
    .hero-section::after {
      content: '';
      position: absolute;
      top: 0;
      right: 0;
      width: 420px;
      height: 420px;
      background: radial-gradient(circle, rgba(14, 165, 164, 0.12) 0%, transparent 70%);
      pointer-events: none;
    }
    .hero-inner {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 60px;
      align-items: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: var(--accent-bg);
      color: #0B7C7B;
      font-size: 13px;
      font-weight: 600;
      border-radius: 999px;
      margin-bottom: 24px;
      border: 1px solid rgba(14, 165, 164, 0.16);
    }
    .hero-badge i { font-size: 12px; }
    .hero-title {
      font-size: 40px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title .highlight {
      color: var(--primary);
    }
    .hero-subtitle {
      font-size: 16px;
      line-height: 1.8;
      color: #4A5568;
      max-width: 560px;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
    }
    .hero-visual {
      position: relative;
    }
    .hero-visual-img {
      border-radius: 20px;
      box-shadow: var(--shadow-card);
      border: 1px solid rgba(226, 232, 240, 0.7);
      aspect-ratio: 4 / 3;
      background: var(--white);
      overflow: hidden;
    }
    .hero-visual-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .hero-float-card {
      position: absolute;
      bottom: -20px;
      left: -20px;
      background: var(--white);
      border-radius: 14px;
      box-shadow: var(--shadow-hover);
      padding: 14px 20px;
      display: flex;
      align-items: center;
      gap: 12px;
      border: 1px solid rgba(226, 232, 240, 0.6);
    }
    .hero-float-card i {
      width: 36px;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 10px;
      font-size: 15px;
    }
    .hero-float-card span { font-size: 13px; font-weight: 600; color: var(--text-main); }
    .hero-float-card small { display: block; font-size: 12px; color: var(--text-muted); margin-top: 2px; }

    /* Section base */
    .section { padding: 100px 0; }
    .section-light { background: var(--white); }
    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 64px;
    }
    .section-tag {
      display: inline-block;
      padding: 5px 14px;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      border-radius: 999px;
      margin-bottom: 16px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.3px;
      margin-bottom: 14px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Entry List */
    .entry-list {
      max-width: 960px;
      margin: 0 auto;
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      padding: 20px 36px;
    }
    .entry-row {
      display: grid;
      grid-template-columns: 64px 1fr auto;
      gap: 24px;
      align-items: center;
      padding: 28px 8px;
    }
    .entry-icon {
      width: 54px;
      height: 54px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 14px;
      font-size: 20px;
      transition: all 0.25s ease;
    }
    .entry-row:hover .entry-icon { transform: scale(1.05); }
    .entry-icon-blue { background: var(--primary-light); color: var(--primary); }
    .entry-icon-teal { background: var(--accent-bg); color: #0B7C7B; }
    .entry-icon-orange { background: var(--warning-bg); color: #B45309; }
    .entry-icon-purple { background: #F0EBFF; color: #6D4FBF; }
    .entry-content h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
      line-height: 1.4;
    }
    .entry-content p {
      font-size: 14px;
      line-height: 1.7;
      color: var(--text-muted);
      max-width: 600px;
    }
    .entry-divider {
      height: 1px;
      background: var(--border-light);
      margin: 0 8px;
    }

    /* Steps */
    .steps-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .steps-list {
      position: relative;
      padding-left: 0;
    }
    .step-item {
      display: flex;
      gap: 20px;
      padding: 20px 0;
      border-bottom: 1px solid var(--border-light);
    }
    .step-item:last-child { border-bottom: none; }
    .step-num {
      width: 40px;
      height: 40px;
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 16px;
      font-weight: 700;
      border-radius: 12px;
    }
    .step-body h3 { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
    .step-body p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }
    .steps-img {
      border-radius: 20px;
      box-shadow: var(--shadow-card);
      overflow: hidden;
      border: 1px solid rgba(226, 232, 240, 0.6);
    }
    .steps-img img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4 / 3; }

    /* Values */
    .value-main-bar {
      background: var(--primary-light);
      border-radius: var(--radius-card);
      padding: 36px 40px;
      display: flex;
      align-items: center;
      gap: 24px;
      margin-bottom: 24px;
    }
    .value-main-bar i {
      width: 56px;
      height: 56px;
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--primary);
      color: #fff;
      border-radius: 14px;
      font-size: 22px;
    }
    .value-main-bar h3 { font-size: 20px; font-weight: 700; margin-bottom: 6px; color: #1A56A8; }
    .value-main-bar p { font-size: 14px; line-height: 1.7; color: #3F5D87; }
    .value-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .value-sub-card {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      padding: 28px;
      transition: all 0.3s ease;
      border: 1px solid rgba(226, 232, 240, 0.5);
    }
    .value-sub-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .value-sub-card i {
      width: 44px;
      height: 44px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      margin-bottom: 16px;
      font-size: 17px;
    }
    .value-sub-card .ic-green { background: var(--accent-bg); color: #0B7C7B; }
    .value-sub-card .ic-orange { background: var(--warning-bg); color: #B45309; }
    .value-sub-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
    .value-sub-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

    /* FAQ */
    .faq-wrap {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      margin-bottom: 16px;
      overflow: hidden;
      transition: box-shadow 0.3s ease;
    }
    .faq-item:hover { box-shadow: var(--shadow-hover); }
    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      padding: 22px 28px;
      background: none;
      border: none;
      cursor: pointer;
      text-align: left;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      transition: color 0.2s ease;
    }
    .faq-question:hover { color: var(--primary); }
    .faq-question:focus-visible {
      outline: 2px solid rgba(43, 108, 176, 0.4);
      outline-offset: -2px;
    }
    .faq-number {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 30px;
      height: 30px;
      padding: 0 8px;
      border-radius: 999px;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      margin-right: 12px;
    }
    .faq-icon {
      width: 32px;
      height: 32px;
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      background: #EDF2F7;
      color: var(--text-muted);
      font-size: 16px;
      transition: all 0.3s ease;
    }
    .faq-item.open .faq-icon {
      background: var(--primary);
      color: #fff;
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      position: relative;
    }
    .faq-answer-inner {
      padding: 0 28px 24px 70px;
    }
    .faq-item.open .faq-answer {
      max-height: 300px;
      border-left: 3px solid var(--primary);
      margin-left: 28px;
    }
    .faq-answer-inner p {
      font-size: 14px;
      line-height: 1.8;
      color: #4A5568;
    }

    /* CTA Band */
    .cta-band {
      background: linear-gradient(120deg, #E3EDF8 0%, #F0F6FC 100%);
      border-radius: 24px;
      padding: 56px 48px;
      text-align: center;
      box-shadow: var(--shadow-card);
      margin-bottom: 100px;
      position: relative;
      overflow: hidden;
    }
    .cta-band::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--accent), var(--warning));
    }
    .cta-band h2 {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .cta-band p {
      font-size: 15px;
      color: #4A5568;
      max-width: 600px;
      margin: 0 auto 28px;
      line-height: 1.7;
    }

    /* Footer */
    .site-footer {
      background: var(--white);
      border-top: 2px solid #1A56A8;
      padding: 56px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 60px;
      margin-bottom: 40px;
    }
    .footer-brand .logo-text { font-size: 20px; margin-bottom: 12px; }
    .footer-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      max-width: 300px;
      margin-top: 12px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .footer-col ul li { margin-bottom: 10px; }
    .footer-col ul li a {
      font-size: 14px;
      color: var(--text-muted);
      transition: color 0.2s ease;
    }
    .footer-col ul li a:hover { color: var(--primary); }
    .footer-bottom {
      border-top: 1px solid var(--border-light);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .footer-bottom span {
      font-size: 13px;
      color: #A0AEC0;
    }

    /* Scroll to top */
    .scroll-top {
      position: fixed;
      right: 28px;
      bottom: 28px;
      z-index: 99;
      width: 48px;
      height: 48px;
      border-radius: 999px;
      background: var(--primary);
      color: #fff;
      border: none;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 24px rgba(43, 108, 176, 0.3);
      transition: all 0.3s ease;
      opacity: 0;
      visibility: hidden;
      transform: translateY(12px);
      font-size: 16px;
    }
    .scroll-top.show {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
    .scroll-top:hover { background: var(--primary-dark); transform: translateY(-2px); }
    .scroll-top:active { transform: translateY(0); }

    /* Responsive */
    @media (max-width: 1024px) {
      :root { --space-section: 80px; }
      .hero-inner { grid-template-columns: 1fr; gap: 40px; }
      .hero-title { font-size: 34px; }
      .steps-wrap { grid-template-columns: 1fr; gap: 40px; }
      .footer-grid { gap: 40px; }
    }
    @media (max-width: 768px) {
      .section { padding: 60px 0; }
      .section-title { font-size: 26px; }
      .entry-list { padding: 16px 20px; }
      .entry-row { grid-template-columns: 48px 1fr; gap: 16px; padding: 22px 4px; }
      .entry-row .btn { grid-column: 2; width: fit-content; }
      .entry-icon { width: 44px; height: 44px; font-size: 17px; }
      .value-grid { grid-template-columns: 1fr; }
      .value-main-bar { flex-direction: column; text-align: center; padding: 28px 24px; }
      .footer-grid { grid-template-columns: 1fr; gap: 32px; }
      .footer-bottom { flex-direction: column; text-align: center; }
      .cta-band { padding: 40px 24px; margin-bottom: 60px; }
      .hero-section { padding: 56px 0 72px; }
      .faq-answer-inner { padding: 0 20px 20px 50px; }
      .faq-question { padding: 18px 20px; font-size: 15px; }
      .header-inner { height: 64px; }
      .nav-chips { order: 3; width: 100%; justify-content: flex-start; padding: 8px 0; }
      .header-inner { flex-wrap: wrap; height: auto; padding: 10px 16px 8px; }
      .site-header { position: relative; }
      .header-cta { height: 36px; padding: 0 14px; }
      .logo-text { font-size: 18px; }
    }
    @media (max-width: 520px) {
      .hero-title { font-size: 27px; }
      .hero-subtitle { font-size: 15px; }
      .section-title { font-size: 23px; }
      .entry-list { padding: 12px 16px; }
      .entry-row { grid-template-columns: 40px 1fr; gap: 12px; }
      .entry-content h3 { font-size: 16px; }
      .entry-content p { font-size: 13px; }
      .header-cta .cta-text { display: none; }
      .header-cta { width: 38px; padding: 0; justify-content: center; }
      .chip-link { height: 32px; padding: 0 14px; font-size: 13px; }
      .faq-number { display: none; }
      .faq-answer-inner { padding: 0 20px 20px 24px; }
      .faq-item.open .faq-answer { margin-left: 16px; }
      .hero-float-card { display: none; }
    }

/* roulang page: article */
:root {
            --primary: #2B6CB0;
            --primary-dark: #1D4F87;
            --primary-light: #E3EDF8;
            --secondary: #0EA5A4;
            --accent: #F59E0B;
            --bg: #F7F9FC;
            --text: #1A202C;
            --text-light: #718096;
            --text-weak: #A0AEC0;
            --border: #E2E8F0;
            --radius: 16px;
            --radius-btn: 10px;
            --shadow: 0 8px 30px rgba(15, 40, 80, 0.06);
            --shadow-hover: 0 14px 40px rgba(15, 40, 80, 0.1);
            --font-default: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-default);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease;
        }

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

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

        /* ===== Header ===== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(15, 40, 80, 0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            gap: 32px;
            height: 72px;
        }

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

        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--primary);
        }

        .nav-chips {
            display: flex;
            gap: 8px;
            flex: 1;
            justify-content: center;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .nav-chips::-webkit-scrollbar {
            display: none;
        }

        .chip-link {
            display: inline-flex;
            align-items: center;
            height: 36px;
            padding: 0 18px;
            border-radius: 999px;
            background: #EDF2F7;
            color: #2D3748;
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            transition: background .2s, color .2s;
            position: relative;
        }

        .chip-link:hover {
            background: #E2E8F0;
            color: var(--primary-dark);
        }

        .chip-link.active {
            background: var(--primary-light);
            color: #1A56A8;
            font-weight: 600;
        }

        .chip-link.active::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 50%;
            transform: translateX(-50%);
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--primary);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 44px;
            padding: 0 20px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            flex-shrink: 0;
            transition: background .2s, transform .2s, box-shadow .2s;
            box-shadow: 0 2px 8px rgba(43, 108, 176, 0.25);
        }

        .header-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(43, 108, 176, 0.3);
        }

        .header-cta:active {
            background: #17406a;
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(43, 108, 176, 0.2);
        }

        .header-cta:focus-visible {
            outline: 3px solid rgba(43, 108, 176, 0.3);
            outline-offset: 2px;
        }

        /* ===== 面包屑 ===== */
        .article-breadcrumb {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 14px 0;
        }

        .article-breadcrumb .container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
            flex-wrap: wrap;
        }

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

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

        .article-breadcrumb .sep {
            color: var(--text-weak);
            font-size: 12px;
        }

        .article-breadcrumb .current {
            color: var(--text);
            font-weight: 500;
            max-width: 260px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== 文章头部 Hero ===== */
        .article-hero {
            background: linear-gradient(135deg, #F0F7FF 0%, #E8F1FA 50%, #DCEAF5 100%);
            padding: 72px 0 56px;
            position: relative;
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
        }

        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }

        .article-hero-inner {
            position: relative;
            max-width: 860px;
            margin: 0 auto;
            text-align: center;
        }

        .article-hero h1 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.4;
            color: var(--text);
            letter-spacing: -0.5px;
            margin-bottom: 20px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            font-size: 14px;
            color: var(--text-light);
            flex-wrap: wrap;
        }

        .article-meta .dot {
            color: var(--text-weak);
            font-size: 4px;
        }

        .article-meta .meta-cat {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(14, 165, 164, 0.1);
            color: #0F766E;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
        }

        /* ===== 正文 ===== */
        .article-section {
            padding: 56px 0 32px;
        }

        .article-container {
            max-width: 860px;
        }

        .article-body {
            background: #fff;
            border-radius: var(--radius);
            padding: 48px 56px;
            box-shadow: var(--shadow);
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin: 36px 0 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
            line-height: 1.4;
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            margin: 28px 0 12px;
            line-height: 1.5;
        }

        .article-body h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin: 20px 0 8px;
        }

        .article-body p {
            font-size: 16px;
            line-height: 1.8;
            color: #2D3748;
            margin-bottom: 16px;
        }

        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

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

        .article-body img {
            border-radius: 12px;
            margin: 24px 0;
            box-shadow: var(--shadow);
        }

        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            background: #F0F7FF;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
            color: #4A5568;
            font-size: 15px;
            line-height: 1.7;
        }

        .article-body code {
            background: #EDF2F7;
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 14px;
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
        }

        .article-body pre {
            background: #1A202C;
            color: #F7FAFC;
            padding: 20px 24px;
            border-radius: 12px;
            overflow-x: auto;
            margin: 24px 0;
            font-size: 14px;
            line-height: 1.7;
        }

        .article-body pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        .article-body ul,
        .article-body ol {
            padding-left: 24px;
            margin-bottom: 16px;
            line-height: 1.8;
            color: #2D3748;
        }

        .article-body li {
            margin-bottom: 6px;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 15px;
        }

        .article-body table th,
        .article-body table td {
            padding: 12px 16px;
            border: 1px solid var(--border);
            text-align: left;
        }

        .article-body table th {
            background: #F7FAFC;
            font-weight: 600;
        }

        /* 内容未找到 */
        .not-found {
            text-align: center;
            padding: 80px 24px;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }

        .not-found-icon {
            width: 72px;
            height: 72px;
            background: #F7FAFC;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: var(--text-weak);
            font-size: 28px;
        }

        .not-found h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .not-found p {
            color: var(--text-light);
            font-size: 15px;
            margin-bottom: 24px;
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 64px 0;
            background: var(--bg);
        }

        .section-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .section-head h2 {
            font-size: 26px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.3px;
            position: relative;
            padding-left: 16px;
        }

        .section-head h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 22px;
            background: var(--primary);
            border-radius: 4px;
        }

        .section-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            padding: 8px 16px;
            border-radius: 999px;
            background: var(--primary-light);
            transition: background .2s, transform .2s;
        }

        .section-more:hover {
            background: #D6E5F2;
            transform: translateX(2px);
        }

        .related-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr 0.8fr;
            gap: 24px;
            align-items: stretch;
        }

        .related-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform .25s ease, box-shadow .25s ease;
            display: flex;
            flex-direction: column;
        }

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

        .related-card:focus-visible {
            outline: 3px solid rgba(43, 108, 176, 0.3);
            outline-offset: 2px;
        }

        .related-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }

        .related-card-lg img {
            height: 200px;
        }

        .related-card-sm {
            opacity: 0.94;
        }

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

        .related-card-body .tag {
            align-self: flex-start;
            display: inline-flex;
            align-items: center;
            background: rgba(14, 165, 164, 0.1);
            color: #0F766E;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 10px;
        }

        .related-card-body h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 8px;
        }

        .related-card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 12px;
        }

        .related-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap .2s;
        }

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

        /* ===== 返回按钮 ===== */
        .back-section {
            padding: 16px 0 64px;
            text-align: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: background .2s, color .2s, border-color .2s, transform .2s;
            border: none;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(43, 108, 176, 0.3);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 8px rgba(43, 108, 176, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(43, 108, 176, 0.3);
        }

        .btn-primary:active {
            background: #17406a;
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(43, 108, 176, 0.2);
        }

        .btn-ghost {
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--primary);
        }

        .btn-ghost:hover {
            background: #F0F7FF;
            transform: translateY(-1px);
            box-shadow: var(--shadow);
        }

        .btn-ghost:active {
            background: #E3EDF8;
            transform: translateY(0);
        }

        /* ===== CTA条 ===== */
        .cta-band {
            background: var(--primary-light);
            border-radius: var(--radius);
            padding: 48px 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            margin: 32px 0 0;
            flex-wrap: wrap;
        }

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

        .cta-band p {
            font-size: 15px;
            color: var(--text-light);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #fff;
            border-top: 3px solid #2D3748;
            padding: 64px 0 24px;
        }

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

        .footer-brand .logo-text {
            font-size: 22px;
            margin-bottom: 16px;
            display: inline-block;
        }

        .footer-desc {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
        }

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

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

        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-light);
            transition: color .2s;
        }

        .footer-col ul li a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-weak);
        }

        /* ===== 浮动 CTA ===== */
        .float-cta {
            position: fixed;
            right: 24px;
            bottom: 24px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 48px;
            padding: 0 24px;
            background: var(--primary);
            color: #fff;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            box-shadow: var(--shadow-hover);
            z-index: 99;
            transition: background .2s, transform .2s, opacity .3s, box-shadow .2s;
        }

        .float-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 16px 48px rgba(43, 108, 176, 0.3);
        }

        .float-cta:active {
            transform: translateY(0);
        }

        .float-cta-hidden {
            opacity: 0.4;
            transform: scale(0.92) translateY(8px);
            pointer-events: none;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .header-inner {
                gap: 16px;
            }

            .nav-chips {
                gap: 6px;
                overflow-x: auto;
            }

            .chip-link {
                padding: 0 14px;
                font-size: 13px;
            }

            .footer-grid {
                gap: 32px;
            }

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

            .related-card:last-child {
                grid-column: span 2;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }

            .site-header {
                position: relative;
            }

            .header-inner {
                height: auto;
                padding: 12px 0;
                flex-wrap: wrap;
                gap: 10px;
            }

            .header-cta .cta-text {
                display: none;
            }

            .header-cta {
                width: 44px;
                padding: 0;
                justify-content: center;
            }

            .nav-chips {
                order: 3;
                width: 100%;
                justify-content: flex-start;
                padding-bottom: 2px;
            }

            .article-hero {
                padding: 48px 0 36px;
            }

            .article-hero h1 {
                font-size: 24px;
            }

            .article-body {
                padding: 24px 20px;
                border-radius: 12px;
            }

            .article-body h2 {
                font-size: 20px;
            }

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

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

            .related-card:last-child {
                grid-column: auto;
            }

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

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

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

            .float-cta {
                right: 16px;
                bottom: 16px;
                height: 44px;
                padding: 0 18px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .logo-text {
                font-size: 18px;
            }

            .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }

            .chip-link {
                padding: 0 12px;
                height: 32px;
                font-size: 12px;
            }

            .article-hero h1 {
                font-size: 20px;
            }

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

            .section-head h2 {
                font-size: 22px;
            }

            .related-card img,
            .related-card-lg img {
                height: 140px;
            }

            .article-breadcrumb .current {
                max-width: 160px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2B6CB0;
            --primary-dark: #1D4F87;
            --primary-deep: #153E6B;
            --primary-light: #E3EDF8;
            --primary-lighter: #F0F7FF;
            --accent: #0EA5A4;
            --accent-light: #E6F7F7;
            --warning: #F59E0B;
            --warning-light: #FEF3C7;
            --bg: #F7F9FC;
            --white: #FFFFFF;
            --text: #2D3748;
            --text-secondary: #4A5568;
            --text-light: #718096;
            --text-faint: #A0AEC0;
            --border: #E2E8F0;
            --border-light: #EDF2F7;
            --shadow: 0 8px 30px rgba(15, 40, 80, 0.06);
            --shadow-hover: 0 14px 40px rgba(15, 40, 80, 0.1);
            --shadow-lg: 0 20px 50px rgba(15, 40, 80, 0.12);
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --transition: all 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 84px;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        input,
        textarea {
            font-family: inherit;
        }

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

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 2px 12px rgba(15, 40, 80, 0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

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

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            box-shadow: 0 4px 12px rgba(43, 108, 176, 0.3);
        }

        .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.5px;
        }

        .logo-text span {
            color: var(--primary);
        }

        .nav-chips {
            display: flex;
            align-items: center;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex: 1;
            justify-content: center;
        }

        .nav-chips::-webkit-scrollbar {
            display: none;
        }

        .chip-link {
            display: inline-flex;
            align-items: center;
            height: 36px;
            padding: 0 18px;
            border-radius: 999px;
            background: #EDF2F7;
            color: #2D3748;
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            transition: var(--transition);
            position: relative;
        }

        .chip-link:hover {
            background: #E2E8F0;
            color: var(--primary);
        }

        .chip-link:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

        .chip-link.active::after {
            content: "";
            position: absolute;
            bottom: 5px;
            left: 50%;
            transform: translateX(-50%);
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--primary);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 40px;
            padding: 0 20px;
            border-radius: 10px;
            background: var(--primary);
            color: var(--white);
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(43, 108, 176, 0.25);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .header-cta:hover {
            background: var(--primary-dark);
            transform: translateY(1px);
            box-shadow: 0 6px 18px rgba(43, 108, 176, 0.35);
        }

        .header-cta:active {
            background: var(--primary-deep);
            transform: translateY(2px);
        }

        .header-cta:focus-visible {
            outline: 3px solid rgba(43, 108, 176, 0.3);
            outline-offset: 2px;
        }

        /* ===== Hero ===== */
        .category-hero {
            position: relative;
            background: linear-gradient(120deg, #F0F6FF 0%, #F7FAFD 60%, #EFF9F8 100%);
            padding: 72px 0 64px;
            border-bottom: 1px solid var(--border-light);
            overflow: hidden;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(43, 108, 176, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(43, 108, 176, 0.04) 1px, transparent 1px);
            background-size: 36px 36px;
            border-radius: 0;
        }

        .category-hero::after {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 40%;
            height: 100%;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.08;
            border-radius: 0;
        }

        .category-hero-inner {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 60px;
        }

        .hero-main {
            flex: 1;
            max-width: 720px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 999px;
            background: var(--white);
            border: 1px solid var(--border-light);
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            box-shadow: var(--shadow);
            margin-bottom: 20px;
        }

        .hero-badge i {
            color: var(--accent);
            font-size: 12px;
        }

        .category-hero h1 {
            font-size: 34px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.35;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .hero-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 560px;
        }

        .hero-ctas {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .hero-ctas .btn {
            min-width: 148px;
            justify-content: center;
        }

        .hero-side {
            width: 220px;
            flex-shrink: 0;
            align-self: center;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .hero-side-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 20px;
            box-shadow: var(--shadow);
            text-align: center;
            border: 1px solid var(--border-light);
        }

        .hero-side-card .icon-circle {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 10px;
        }

        .hero-side-card .icon-circle.blue {
            background: var(--primary-light);
            color: var(--primary);
        }

        .hero-side-card .icon-circle.teal {
            background: var(--accent-light);
            color: var(--accent);
        }

        .hero-side-card .icon-circle.orange {
            background: var(--warning-light);
            color: var(--warning);
        }

        .hero-side-card h3 {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .hero-side-card p {
            font-size: 12px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-md);
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: var(--white);
            box-shadow: 0 4px 14px rgba(43, 108, 176, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(1px);
            box-shadow: 0 6px 20px rgba(43, 108, 176, 0.35);
        }

        .btn-primary:active {
            background: var(--primary-deep);
            transform: translateY(2px);
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(43, 108, 176, 0.3);
            outline-offset: 2px;
        }

        .btn-secondary {
            background: var(--white);
            color: var(--primary);
            border: 1px solid var(--primary);
        }

        .btn-secondary:hover {
            background: var(--primary-lighter);
            transform: translateY(1px);
        }

        .btn-secondary:active {
            background: var(--primary-light);
            transform: translateY(2px);
        }

        .btn-secondary:focus-visible {
            outline: 3px solid rgba(43, 108, 176, 0.25);
            outline-offset: 2px;
        }

        .btn-light {
            background: var(--white);
            color: var(--primary);
            box-shadow: var(--shadow);
        }

        .btn-light:hover {
            background: var(--primary-lighter);
            transform: translateY(1px);
            box-shadow: var(--shadow-hover);
        }

        .btn-light:focus-visible {
            outline: 3px solid rgba(255, 255, 255, 0.4);
            outline-offset: 2px;
        }

        .btn-ghost {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--border);
        }

        .btn-ghost:hover {
            background: var(--primary-lighter);
            border-color: var(--primary);
        }

        .btn-ghost:focus-visible {
            outline: 3px solid rgba(43, 108, 176, 0.2);
            outline-offset: 2px;
        }

        /* ===== Sections ===== */
        .section {
            padding: 80px 0;
        }

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

        .section-head {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-head .section-eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 10px;
        }

        .section-head h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
            letter-spacing: 0.5px;
            margin-bottom: 10px;
        }

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

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

        .section-head-left h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .section-head-left p {
            font-size: 15px;
            color: var(--text-light);
            max-width: 600px;
        }

        /* ===== Info Types ===== */
        .info-types-layout {
            display: grid;
            grid-template-columns: 260px 1fr;
            gap: 40px;
            align-items: start;
        }

        .type-index-column {
            display: flex;
            flex-direction: column;
            gap: 12px;
            position: sticky;
            top: 96px;
        }

        .type-index-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 18px;
            border-radius: var(--radius-md);
            background: var(--white);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
            transition: var(--transition);
            cursor: default;
        }

        .type-index-item:hover {
            border-color: var(--primary-light);
            transform: translateX(4px);
        }

        .type-index-item.active {
            background: var(--primary-light);
            border-color: var(--primary);
        }

        .type-index-item .index-num {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .type-index-item.active .index-num {
            background: var(--primary);
            color: var(--white);
        }

        .type-index-item .index-label {
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
        }

        .type-panel-wrap {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .type-panel {
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 28px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }

        .type-panel:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .type-panel-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }

        .type-panel-icon.blue {
            background: var(--primary-light);
            color: var(--primary);
        }

        .type-panel-icon.teal {
            background: var(--accent-light);
            color: var(--accent);
        }

        .type-panel-icon.orange {
            background: var(--warning-light);
            color: var(--warning);
        }

        .type-panel-icon.green {
            background: #E6FFFA;
            color: #319795;
        }

        .type-panel-content h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text);
        }

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

        .type-block-note {
            background: var(--primary-lighter);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            border-left: 4px solid var(--primary);
            margin-top: 8px;
        }

        .type-block-note .note-title {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 6px;
        }

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

        /* ===== Features ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-bottom: 24px;
        }

        .feature-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            display: flex;
            gap: 16px;
            transition: var(--transition);
        }

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

        .feature-card .feature-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .feature-card.teal .feature-icon {
            background: var(--accent-light);
            color: var(--accent);
        }

        .feature-card.orange .feature-icon {
            background: var(--warning-light);
            color: var(--warning);
        }

        .feature-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
        }

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

        .feature-banner {
            background: linear-gradient(120deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            color: var(--white);
        }

        .feature-banner .banner-text {
            flex: 1;
        }

        .feature-banner .banner-text h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .feature-banner .banner-text p {
            font-size: 14px;
            opacity: 0.9;
            line-height: 1.6;
        }

        .feature-banner .banner-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 40px;
            padding: 0 20px;
            background: var(--white);
            color: var(--primary-dark);
            border-radius: var(--radius-md);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
        }

        .feature-banner .banner-link:hover {
            background: var(--primary-lighter);
            transform: translateY(1px);
        }

        .feature-banner .banner-link:focus-visible {
            outline: 3px solid rgba(255, 255, 255, 0.4);
            outline-offset: 2px;
        }

        /* ===== Scenarios ===== */
        .scenarios-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .scenario-left {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .scenario-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            display: flex;
            gap: 16px;
            transition: var(--transition);
        }

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

        .scenario-num {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary-light);
            line-height: 1;
            flex-shrink: 0;
            width: 48px;
        }

        .scenario-body h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
        }

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

        .scenario-right {
            background: linear-gradient(145deg, var(--primary-lighter), var(--white));
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 16px;
            position: relative;
            overflow: hidden;
        }

        .scenario-right::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 120px;
            height: 120px;
            background: url('/assets/images/coverpic/cover-6.webp') center/cover no-repeat;
            opacity: 0.12;
            border-radius: 0 0 0 16px;
        }

        .scenario-right h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--primary-dark);
        }

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

        .scenario-tag-row {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-top: 4px;
        }

        .scenario-tag {
            padding: 4px 12px;
            border-radius: 999px;
            background: var(--white);
            border: 1px solid var(--border);
            font-size: 12px;
            color: var(--text-secondary);
        }

        .scenario-tag.highlight {
            background: var(--accent-light);
            border-color: transparent;
            color: var(--accent);
        }

        /* ===== Process ===== */
        .process-layout {
            display: flex;
            flex-direction: column;
            gap: 0;
            max-width: 720px;
            margin: 0 auto;
        }

        .process-item {
            display: flex;
            gap: 24px;
            position: relative;
            padding-bottom: 32px;
        }

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

        .process-item::before {
            content: "";
            position: absolute;
            left: 23px;
            top: 48px;
            bottom: 0;
            width: 2px;
            background: var(--border-light);
        }

        .process-item:last-child::before {
            display: none;
        }

        .process-dot {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--white);
            border: 2px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            flex-shrink: 0;
            z-index: 1;
            box-shadow: 0 0 0 4px var(--primary-light);
        }

        .process-content {
            flex: 1;
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

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

        .process-content h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }

        .process-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-panel {
            max-width: 800px;
            margin: 0 auto;
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 8px 32px;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-light);
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-details {
            position: relative;
        }

        .faq-details summary {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 0;
            cursor: pointer;
            transition: var(--transition);
        }

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

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

        .faq-details summary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
            border-radius: 6px;
        }

        .faq-num {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .faq-text {
            flex: 1;
            font-size: 15px;
            font-weight: 600;
            color: inherit;
            line-height: 1.5;
        }

        .faq-icon {
            color: var(--text-light);
            font-size: 14px;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-details[open] .faq-icon {
            transform: rotate(135deg);
            color: var(--primary);
        }

        .faq-answer {
            display: none;
            padding: 0 0 20px 42px;
            border-left: 3px solid var(--primary);
            margin-left: 14px;
            padding-left: 28px;
        }

        .faq-details[open] .faq-answer {
            display: block;
        }

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

        /* ===== CTA Band ===== */
        .cta-band {
            background: linear-gradient(120deg, var(--primary-light), var(--white));
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }

        .cta-band::after {
            content: "";
            position: absolute;
            bottom: 0;
            right: 0;
            width: 280px;
            height: 180px;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.06;
            border-radius: 16px 0 0 0;
        }

        .cta-band h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }

        .cta-band p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .cta-band .btn-wrap {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--white);
            border-top: 3px solid var(--primary);
            padding: 56px 0 24px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand .logo-text {
            font-size: 20px;
            margin-bottom: 14px;
            display: inline-block;
        }

        .footer-desc {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-light);
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            font-size: 12px;
            color: var(--text-faint);
        }

        /* ===== Float CTA ===== */
        .float-cta {
            position: fixed;
            right: 24px;
            bottom: 32px;
            z-index: 90;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 48px;
            padding: 0 22px;
            border-radius: 999px;
            background: var(--primary);
            color: var(--white);
            font-size: 14px;
            font-weight: 600;
            box-shadow: var(--shadow-hover);
            transition: var(--transition);
            opacity: 0.95;
        }

        .float-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            opacity: 1;
        }

        .float-cta:focus-visible {
            outline: 3px solid rgba(43, 108, 176, 0.3);
            outline-offset: 2px;
        }

        .float-cta i {
            font-size: 12px;
            transition: transform 0.3s ease;
        }

        .float-cta:hover i {
            transform: rotate(45deg);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .category-hero-inner {
                gap: 40px;
            }

            .hero-side {
                width: 200px;
            }

            .info-types-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .type-index-column {
                flex-direction: row;
                flex-wrap: wrap;
                position: static;
                top: auto;
            }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }

            .site-header .header-inner {
                flex-wrap: wrap;
                height: auto;
                padding: 12px 0;
                gap: 12px;
            }

            .logo-wrap {
                flex: 1;
            }

            .nav-chips {
                order: 3;
                width: 100%;
                justify-content: flex-start;
            }

            .header-cta {
                padding: 0 14px;
            }

            .category-hero {
                padding: 48px 0 44px;
            }

            .category-hero-inner {
                flex-direction: column;
                gap: 32px;
            }

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

            .hero-side {
                width: 100%;
                flex-direction: row;
                flex-wrap: wrap;
            }

            .hero-side-card {
                flex: 1;
                min-width: 140px;
            }

            .section {
                padding: 56px 0;
            }

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

            .section-head h2 {
                font-size: 22px;
            }

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

            .feature-banner {
                flex-direction: column;
                text-align: center;
                padding: 24px;
            }

            .scenarios-layout {
                grid-template-columns: 1fr;
            }

            .cta-band {
                padding: 40px 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .float-cta {
                right: 16px;
                bottom: 20px;
                height: 44px;
                padding: 0 16px;
                font-size: 13px;
            }

            .faq-panel {
                padding: 8px 20px;
            }
        }

        @media (max-width: 520px) {
            .header-cta .cta-text {
                display: none;
            }

            .header-cta {
                width: 40px;
                padding: 0;
                justify-content: center;
            }

            .chip-link {
                height: 32px;
                padding: 0 14px;
                font-size: 13px;
            }

            .category-hero h1 {
                font-size: 23px;
            }

            .hero-ctas {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-ctas .btn {
                width: 100%;
            }

            .hero-side-card {
                min-width: 100%;
            }

            .type-panel {
                flex-direction: column;
                padding: 22px;
            }

            .type-block-note {
                padding: 20px;
            }

            .scenario-right {
                padding: 24px;
            }

            .process-content {
                padding: 16px;
            }

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

            .cta-band .btn-wrap {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-band .btn-wrap .btn {
                width: 100%;
                justify-content: center;
            }

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

            .float-cta {
                width: 44px;
                padding: 0;
                justify-content: center;
                border-radius: 50%;
            }

            .float-cta i {
                font-size: 14px;
            }
        }

/* roulang page: category3 */
:root {
  --primary: #2B6CB0;
  --primary-dark: #1D4F87;
  --primary-deep: #173F6B;
  --primary-light: #E3EDF8;
  --primary-soft: #F0F7FF;
  --accent-teal: #0EA5A4;
  --accent-orange: #F59E0B;
  --bg: #F7F9FC;
  --white: #FFFFFF;
  --text: #1A202C;
  --text-weak: #718096;
  --text-light: #A0AEC0;
  --border: #E2E8F0;
  --border-light: #EDF2F7;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-img: 12px;
  --shadow-card: 0 8px 30px rgba(15, 40, 80, 0.06);
  --shadow-card-hover: 0 14px 40px rgba(15, 40, 80, 0.1);
  --container: 1200px;
  --space: 96px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }
input { font-family: inherit; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  padding: 14px 0;
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(15, 40, 80, 0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent-teal) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  box-shadow: 0 4px 12px rgba(43, 108, 176, 0.25);
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.5px;
}
.logo-text span { color: var(--primary); }
.nav-chips {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding: 4px 0;
}
.nav-chips::-webkit-scrollbar { display: none; }
.chip-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--border-light);
  color: #2D3748;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  transition: all 0.25s ease;
  position: relative;
}
.chip-link:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
}
.chip-link.active {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 600;
}
.chip-link.active::after {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--primary);
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
}
.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 20px;
  border-radius: var(--radius-btn);
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.25s ease;
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(43, 108, 176, 0.25);
}
.header-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(43, 108, 176, 0.3);
}
.header-cta:active {
  transform: translateY(0);
  background: var(--primary-deep);
}
.header-cta:focus-visible {
  outline: 3px solid rgba(43, 108, 176, 0.3);
  outline-offset: 2px;
}
.cta-text { display: inline; }

/* ===== Hero ===== */
.page-hero {
  position: relative;
  background: linear-gradient(135deg, #EBF4FF 0%, #F7F9FC 55%, #FFFFFF 100%);
  padding: 72px 0;
  border-bottom: 1px solid var(--border-light);
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.1;
  z-index: 0;
}
.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(43, 108, 176, 0.08) 1px, transparent 1px);
  background-size: 28px 28px;
  z-index: 0;
  pointer-events: none;
}
.page-hero .container {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 24px;
}
.breadcrumb a { color: var(--text-weak); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .current { color: var(--text-light); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(14, 165, 164, 0.12);
  color: #0F766E;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}
.hero-tag i { font-size: 12px; }
.page-hero h1 {
  font-size: 34px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
}
.page-hero h1 .keyword {
  color: var(--primary);
}
.hero-desc {
  font-size: 16px;
  color: var(--text-weak);
  max-width: 520px;
  margin-bottom: 28px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 46px;
  padding: 0 26px;
  border-radius: var(--radius-btn);
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.25s ease;
  box-shadow: 0 4px 16px rgba(43, 108, 176, 0.25);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(43, 108, 176, 0.3);
}
.btn-primary:active {
  transform: translateY(0);
  background: var(--primary-deep);
}
.btn-primary:focus-visible {
  outline: 3px solid rgba(43, 108, 176, 0.3);
  outline-offset: 2px;
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 46px;
  padding: 0 24px;
  border-radius: var(--radius-btn);
  background: var(--white);
  color: var(--primary);
  border: 1px solid rgba(43, 108, 176, 0.3);
  font-size: 15px;
  font-weight: 500;
  transition: all 0.25s ease;
}
.btn-ghost:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
  transform: translateY(-1px);
}
.btn-ghost:active { transform: translateY(0); }
.btn-ghost:focus-visible {
  outline: 3px solid rgba(43, 108, 176, 0.2);
  outline-offset: 2px;
}
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-img-wrap {
  background: var(--white);
  border-radius: 20px;
  padding: 10px;
  box-shadow: var(--shadow-card);
  transform: rotate(2deg);
  transition: all 0.35s ease;
  max-width: 420px;
  width: 100%;
}
.hero-img-wrap:hover {
  transform: rotate(0deg) scale(1.02);
  box-shadow: var(--shadow-card-hover);
}
.hero-img-wrap img {
  border-radius: 14px;
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  object-fit: cover;
}

/* ===== Section common ===== */
.section-pad { padding: var(--space) 0; }
.section-header {
  max-width: 640px;
  margin-bottom: 48px;
}
.section-header.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: 28px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}
.section-header p {
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.7;
}

/* ===== Service Entry List ===== */
.service-list-section { background: var(--white); padding: var(--space) 0; }
.service-entry-list {
  border-top: 1px solid var(--border-light);
}
.service-entry {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 32px 0;
  border-bottom: 1px solid var(--border-light);
  transition: background 0.25s ease;
  border-radius: 8px;
  padding-left: 16px;
  padding-right: 16px;
}
.service-entry:hover {
  background: var(--primary-soft);
  padding-left: 24px;
  padding-right: 24px;
}
.entry-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: all 0.3s ease;
}
.service-entry:hover .entry-icon {
  background: var(--primary);
  color: #fff;
  transform: scale(1.05);
  box-shadow: 0 6px 16px rgba(43, 108, 176, 0.3);
}
.entry-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.entry-body p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  max-width: 640px;
}
.entry-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-btn);
  background: var(--white);
  border: 1px solid var(--border);
  color: var(--text-weak);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.25s ease;
  white-space: nowrap;
}
.entry-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-soft);
  transform: translateX(3px);
}
.entry-btn:active { transform: translateX(0); }
.entry-btn:focus-visible {
  outline: 3px solid rgba(43, 108, 176, 0.2);
  outline-offset: 2px;
}

/* ===== Features ===== */
.features-section { background: var(--bg); padding: var(--space) 0; }
.features-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  margin-bottom: 32px;
}
.feature-stack {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.feature-card {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: 32px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  border: 1px solid transparent;
}
.feature-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
  border-color: var(--primary-light);
}
.feature-main {
  background: linear-gradient(145deg, var(--white) 0%, var(--primary-soft) 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 260px;
  position: relative;
  overflow: hidden;
}
.feature-main::after {
  content: '';
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: rgba(43, 108, 176, 0.05);
}
.feature-main .feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--primary);
  color: #fff;
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 6px 18px rgba(43, 108, 176, 0.3);
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}
.feature-card p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
}
.feature-stack .feature-card {
  min-height: 118px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.feature-stack .feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(14, 165, 164, 0.1);
  color: var(--accent-teal);
  font-size: 17px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.feature-stack .feature-card:nth-child(2) .feature-icon {
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-orange);
}
.feature-banner {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: 28px 32px;
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: flex-start;
  gap: 16px;
  border-left: 4px solid var(--primary);
}
.feature-banner i {
  color: var(--primary);
  font-size: 20px;
  margin-top: 3px;
}
.feature-banner p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.8;
}

/* ===== Flow ===== */
.flow-section { background: var(--white); padding: var(--space) 0; }
.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.flow-steps::before {
  content: '';
  position: absolute;
  top: 34px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: var(--border-light);
  z-index: 0;
}
.flow-step {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 12px;
}
.flow-step .step-num {
  position: absolute;
  top: -12px;
  right: 16px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: 1px;
}
.flow-step .step-icon {
  width: 68px;
  height: 68px;
  margin: 0 auto 20px;
  border-radius: 20px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
  box-shadow: 0 0 0 6px var(--white);
  transition: all 0.3s ease;
}
.flow-step:hover .step-icon {
  background: var(--primary);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(43, 108, 176, 0.3);
}
.flow-step h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}
.flow-step p {
  font-size: 13px;
  color: var(--text-weak);
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-section { background: var(--bg); padding: var(--space) 0; }
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: var(--white);
  border-radius: var(--radius-card);
  margin-bottom: 16px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}
.faq-item.active {
  box-shadow: var(--shadow-card-hover);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px 28px;
  text-align: left;
  background: transparent;
  transition: background 0.2s ease;
}
.faq-question:hover { background: var(--primary-soft); }
.faq-question:focus-visible {
  outline: 3px solid rgba(43, 108, 176, 0.2);
}
.faq-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-light);
  background: var(--border-light);
  width: 32px;
  height: 32px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.3s ease;
}
.faq-item.active .faq-num {
  background: var(--primary);
  color: #fff;
}
.faq-text {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  flex: 1;
}
.faq-icon {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-weak);
  font-size: 13px;
  transition: all 0.3s ease;
  flex-shrink: 0;
}
.faq-item.active .faq-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: all 0.35s ease;
  border-left: 3px solid transparent;
  margin: 0 28px;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  opacity: 1;
  border-left-color: var(--primary);
  margin: 0 28px 24px;
  padding-left: 20px;
}
.faq-answer p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  padding: 12px 0 4px;
}

/* ===== CTA ===== */
.cta-section { padding: 72px 0; }
.cta-banner {
  background: linear-gradient(135deg, var(--primary) 0%, #3B82A0 100%);
  border-radius: 24px;
  padding: 56px 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
  background-size: 24px 24px;
}
.cta-banner h2 {
  position: relative;
  z-index: 1;
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.cta-banner p {
  position: relative;
  z-index: 1;
  font-size: 15px;
  color: rgba(255,255,255,0.85);
  max-width: 560px;
  margin: 0 auto 28px;
  line-height: 1.7;
}
.btn-light {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 48px;
  padding: 0 32px;
  border-radius: var(--radius-btn);
  background: #fff;
  color: var(--primary);
  font-size: 15px;
  font-weight: 600;
  transition: all 0.25s ease;
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}
.btn-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(0,0,0,0.16);
  background: var(--primary-soft);
}
.btn-light:active { transform: translateY(0); }
.btn-light:focus-visible {
  outline: 3px solid rgba(255,255,255,0.5);
  outline-offset: 2px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--white);
  border-top: 3px solid var(--text);
  padding: 64px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .logo-text {
  font-size: 20px;
  margin-bottom: 14px;
}
.footer-desc {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 18px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
  font-size: 14px;
  color: var(--text-weak);
  transition: color 0.2s ease;
}
.footer-col ul a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom span {
  font-size: 13px;
  color: var(--text-light);
}

/* ===== Float CTA ===== */
.float-cta {
  position: fixed;
  right: 24px;
  bottom: 28px;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(43, 108, 176, 0.35);
  transition: all 0.35s ease;
}
.float-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}
.float-cta:active { transform: translateY(0); }
.float-cta.minimized {
  opacity: 0.5;
  transform: scale(0.9);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root { --space: 72px; }
  .hero-grid { gap: 32px; }
  .page-hero h1 { font-size: 30px; }
  .features-grid { grid-template-columns: 1fr; }
  .feature-main { min-height: 200px; }
  .flow-steps { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .flow-steps::before { display: none; }
}
@media (max-width: 768px) {
  :root { --space: 56px; }
  .container { padding: 0 20px; }
  .header-inner { flex-wrap: wrap; gap: 12px; }
  .nav-chips { order: 3; width: 100%; padding: 4px 2px; }
  .header-cta { padding: 0 16px; }
  .cta-text { display: none; }
  .header-cta i { font-size: 16px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .hero-img-wrap { max-width: 320px; }
  .page-hero h1 { font-size: 26px; }
  .service-entry { grid-template-columns: 48px 1fr; gap: 16px; padding: 24px 12px; }
  .entry-btn { grid-column: 2; justify-self: start; }
  .service-entry:hover { padding-left: 12px; padding-right: 12px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-banner { padding: 40px 28px; }
  .cta-banner h2 { font-size: 22px; }
  .float-cta { right: 16px; bottom: 20px; padding: 0 18px; }
}
@media (max-width: 520px) {
  :root { --space: 48px; }
  .logo-text { font-size: 16px; }
  .page-hero { padding: 48px 0; }
  .page-hero h1 { font-size: 22px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-ghost { justify-content: center; width: 100%; }
  .section-header h2 { font-size: 24px; }
  .flow-steps { grid-template-columns: 1fr; }
  .feature-card { padding: 24px; }
  .feature-stack .feature-card { flex-direction: column; }
  .feature-banner { padding: 20px; flex-direction: column; }
  .faq-question { padding: 18px 16px; }
  .faq-item.active .faq-answer { margin: 0 16px 20px; }
  .cta-section { padding: 48px 0; }
}