/* roulang page: index */
:root {
  --primary: #FF6A2B;
  --primary-dark: #E8541A;
  --primary-light: #FFE8DC;
  --secondary: #1B2A4A;
  --secondary-light: #33456B;
  --accent: #FDC400;
  --bg-body: #FAF7F4;
  --bg-white: #FFFFFF;
  --bg-dark: #131F36;
  --text-main: #222B3A;
  --text-muted: #728197;
  --border: #E9E4DF;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-card: 0 6px 24px rgba(27, 42, 74, 0.07);
  --shadow-hover: 0 14px 34px rgba(255, 106, 43, 0.15);
  --transition: all 0.3s ease;
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

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

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text-main);
}

:focus-visible {
  outline: 3px solid rgba(255, 106, 43, 0.5);
  outline-offset: 2px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.4;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn i {
  font-size: 14px;
  transition: transform 0.3s ease;
}

.btn:hover i {
  transform: translateX(4px);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 4px 14px rgba(255, 106, 43, 0.3);
}

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  box-shadow: 0 8px 24px rgba(232, 84, 26, 0.35);
  transform: translateY(-2px);
  color: #fff;
}

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

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

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

.btn-sm {
  padding: 8px 20px;
  font-size: 14px;
}

.btn-light {
  background: #fff;
  color: var(--primary-dark);
  border-color: #fff;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

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

.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.7);
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}

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

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary-dark);
  letter-spacing: 0.02em;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  background: var(--accent);
  color: var(--secondary);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(27, 42, 74, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 24px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-shrink: 0;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 18px;
  box-shadow: 0 4px 12px rgba(255, 106, 43, 0.3);
}

.logo-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--text-main);
  white-space: nowrap;
}

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

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition);
}

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

.nav-link.active {
  color: var(--primary-dark);
  background: var(--primary-light);
}

.header-search {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 14px;
  font-size: 14px;
  color: var(--text-muted);
  pointer-events: none;
}

.header-search input {
  width: 220px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 40px;
  padding: 0 16px 0 38px;
  background: var(--bg-body);
  font-size: 14px;
  transition: var(--transition);
}

.header-search input:focus {
  outline: none;
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(255, 106, 43, 0.12);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--text-main);
  cursor: pointer;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
}

.mobile-menu {
  display: none;
  padding: 16px 24px 24px;
  border-top: 1px solid var(--border);
  background: #fff;
}

.mobile-menu.open {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-menu .nav-link {
  padding: 12px 16px;
  font-size: 16px;
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  min-height: 600px;
  background: var(--bg-white);
}

.hero-content {
  padding: 80px 60px 60px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: var(--bg-white);
}

.hero-content::before {
  content: '';
  position: absolute;
  right: -80px;
  top: -100px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 106, 43, 0.08), transparent 70%);
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 40px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 24px;
  width: fit-content;
}

.hero-badge i {
  color: var(--primary);
}

.hero h1 {
  font-size: 42px;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.hero-desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.hero-stat strong {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--text-main);
}

.hero-stat span {
  font-size: 14px;
  color: var(--text-muted);
}

.hero-visual {
  position: relative;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  min-height: 100%;
  overflow: hidden;
}

.hero-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(27, 42, 74, 0.55), rgba(27, 42, 74, 0.1));
  z-index: 1;
}

.hero-float-card {
  position: absolute;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
  animation: float 5s ease-in-out infinite;
}

.hero-float-card i {
  font-size: 22px;
  color: var(--primary);
}

.hero-float-card strong {
  display: block;
  font-size: 15px;
  color: var(--text-main);
}

.hero-float-card span {
  font-size: 13px;
  color: var(--text-muted);
}

.float-card-1 {
  top: 18%;
  left: 8%;
}

.float-card-2 {
  bottom: 22%;
  right: 10%;
  animation-delay: 1.5s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.stats-bar {
  background: var(--secondary);
  padding: 36px 0;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 16px;
  color: #fff;
}

.stat-item i {
  font-size: 28px;
  color: var(--accent);
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.1);
  flex-shrink: 0;
}

.stat-item strong {
  display: block;
  font-size: 24px;
  font-weight: 800;
}

.stat-item span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

.section {
  padding: 90px 0;
}

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

.section-head {
  max-width: 640px;
  margin: 0 auto 52px;
  text-align: center;
}

.section-head-row {
  max-width: none;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  text-align: left;
  margin-bottom: 36px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: 32px;
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-head p {
  font-size: 16px;
  color: var(--text-muted);
}

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--primary);
  padding: 8px 16px;
  border-radius: 30px;
  background: var(--primary-light);
  transition: var(--transition);
  flex-shrink: 0;
}

.link-more:hover {
  background: var(--primary);
  color: #fff;
}

.link-more i {
  transition: transform 0.3s ease;
}

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

.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
  height: 100%;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 106, 43, 0.3);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 18px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  color: var(--primary);
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: var(--primary);
  color: #fff;
  transform: scale(1.06);
}

.feature-card h3 {
  font-size: 19px;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
}

.cat-hero-card {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.cat-hero-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: rgba(255, 106, 43, 0.3);
}

.cat-hero-img {
  overflow: hidden;
  min-height: 280px;
}

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

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

.cat-hero-content {
  padding: 40px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}

.cat-hero-content h3 {
  font-size: 26px;
  margin: 14px 0 10px;
}

.cat-hero-content p {
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.7;
  max-width: 460px;
}

.cat-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--primary);
}

.cat-link i {
  transition: transform 0.3s ease;
}

.cat-hero-card:hover .cat-link i {
  transform: translateX(6px);
}

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

.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px 28px;
  transition: var(--transition);
}

.news-item:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 106, 43, 0.25);
  transform: translateX(4px);
}

.news-item-main h3 {
  font-size: 18px;
  margin: 10px 0 6px;
  color: var(--text-main);
  transition: var(--transition);
}

.news-item:hover .news-item-main h3 {
  color: var(--primary-dark);
}

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

.news-item-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
}

.news-item-meta time {
  font-size: 13px;
  color: var(--text-muted);
}

.news-item-meta i {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 14px;
  transition: var(--transition);
}

.news-item:hover .news-item-meta i {
  background: var(--primary);
  color: #fff;
  transform: translateX(4px);
}

.empty-tip {
  text-align: center;
  padding: 40px;
  background: var(--bg-white);
  border-radius: 16px;
  border: 1px dashed var(--border);
  color: var(--text-muted);
  font-size: 16px;
}

.hot-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
}

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

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

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

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

.hot-card-img .badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
}

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

.hot-card-body .tag {
  width: fit-content;
}

.hot-card-body h3 {
  font-size: 17px;
  margin: 10px 0 6px;
  line-height: 1.4;
}

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

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
}

.text-link i {
  transition: transform 0.3s ease;
}

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

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

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

.step-num {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 36px;
  font-weight: 800;
  color: rgba(255, 106, 43, 0.14);
}

.process-step i {
  font-size: 32px;
  color: var(--primary);
  margin-bottom: 16px;
}

.process-step h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

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

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

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

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-body);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(255, 106, 43, 0.3);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
}

.faq-question i {
  transition: transform 0.3s ease;
  color: var(--primary);
  flex-shrink: 0;
}

.faq-question[aria-expanded="true"] i {
  transform: rotate(180deg);
}

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

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
}

.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--secondary) 0%, #16233D 100%);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 106, 43, 0.16), transparent 70%);
  top: -160px;
  right: -100px;
}

.cta-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}

.cta-info h2 {
  color: #fff;
  font-size: 30px;
  margin-bottom: 10px;
}

.cta-info p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 16px;
}

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

.site-footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}

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

.footer-brand p {
  font-size: 14px;
  margin-top: 16px;
  max-width: 300px;
  line-height: 1.7;
}

.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.8);
  font-size: 16px;
  transition: var(--transition);
}

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

.footer-links-col h3 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 18px;
}

.footer-links-col a {
  display: block;
  font-size: 14px;
  padding: 5px 0;
  color: rgba(255, 255, 255, 0.7);
}

.footer-links-col a:hover {
  color: var(--accent);
  padding-left: 6px;
}

.footer-contact p {
  font-size: 14px;
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.footer-contact i {
  color: var(--accent);
  margin-top: 3px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  padding: 22px 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.stats-bar .grid-x > .cell,
.features .grid-x > .cell,
.hot-section .grid-x > .cell,
.process .grid-x > .cell {
  margin-bottom: 28px;
}

@media (min-width: 1025px) {
  .features .grid-x > .cell:nth-last-child(-n+3):nth-child(3n+1),
  .features .grid-x > .cell:nth-last-child(-n+3):nth-child(3n+1) ~ .cell,
  .hot-section .grid-x > .cell:nth-last-child(-n+4):nth-child(4n+1),
  .hot-section .grid-x > .cell:nth-last-child(-n+4):nth-child(4n+1) ~ .cell,
  .process .grid-x > .cell:nth-last-child(-n+4):nth-child(4n+1),
  .process .grid-x > .cell:nth-last-child(-n+4):nth-child(4n+1) ~ .cell,
  .stats-bar .grid-x > .cell:nth-last-child(-n+4):nth-child(4n+1),
  .stats-bar .grid-x > .cell:nth-last-child(-n+4):nth-child(4n+1) ~ .cell {
    margin-bottom: 0;
  }
}

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .hero-content {
    padding: 60px 40px 40px;
  }
  .hero-visual {
    min-height: 340px;
    order: -1;
  }
  .hero h1 {
    font-size: 36px;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
  }
  .header-search {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .header-cta {
    display: none;
  }
  .header-inner {
    height: 64px;
  }
  .section {
    padding: 60px 0;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .cta-box {
    flex-direction: column;
    text-align: center;
  }
  .cta-actions {
    justify-content: center;
  }
}

@media (max-width: 520px) {
  .hero-content {
    padding: 40px 20px 32px;
  }
  .hero h1 {
    font-size: 28px;
  }
  .hero-stats {
    gap: 20px;
    flex-wrap: wrap;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .news-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .news-item-meta {
    width: 100%;
    justify-content: space-between;
  }
  .cat-hero-card {
    grid-template-columns: 1fr;
  }
  .cat-hero-img {
    min-height: 200px;
  }
  .cat-hero-content {
    padding: 28px 24px;
  }
  .section-head-row {
    flex-direction: column;
    align-items: flex-start;
  }
  .btn-lg {
    padding: 14px 26px;
  }
}

@media (max-width: 1024px) and (min-width: 769px) {
  .hero-content {
    padding: 50px 36px;
  }
  .hero h1 {
    font-size: 34px;
  }
  .header-search input {
    width: 160px;
  }
}

/* roulang page: category1 */
:root {
            --primary: #0f6bff;
            --primary-dark: #0a4fc4;
            --primary-light: #e8f0ff;
            --accent: #ff6a3d;
            --accent-dark: #e04e22;
            --bg-light: #f6f8fc;
            --bg-white: #ffffff;
            --bg-dark: #0c1222;
            --text-dark: #1a2333;
            --text-body: #4a5568;
            --text-light: #8a94a6;
            --border-color: #e6eaf2;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(16, 24, 40, .06);
            --shadow-md: 0 8px 24px rgba(16, 24, 40, .08);
            --shadow-lg: 0 16px 40px rgba(16, 24, 40, .10);
            --space-section: 80px;
            --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --transition-fast: .2s ease;
            --transition-normal: .35s cubic-bezier(.4, 0, .2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-light);
            color: var(--text-body);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            font-weight: 700;
            line-height: 1.3;
            margin-top: 0;
        }

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

        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: saturate(180%) blur(16px);
            border-bottom: 1px solid rgba(230, 234, 242, 0.7);
            position: sticky;
            top: 0;
            z-index: 100;
            height: 68px;
            display: flex;
            align-items: center;
        }

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

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text-dark);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1rem;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(15, 107, 255, 0.25);
        }

        .logo-text {
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

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

        .main-nav .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-body);
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }

        .main-nav .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
            border-color: rgba(15, 107, 255, 0.15);
        }

        .main-nav .nav-link.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(15, 107, 255, 0.3);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent), #ff8a5c);
            color: #fff !important;
            padding: 8px 20px !important;
            border-radius: 40px;
            font-weight: 700;
            font-size: 0.88rem;
            box-shadow: 0 4px 14px rgba(255, 106, 61, 0.3);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 106, 61, 0.4);
        }

        .mobile-menu-btn {
            display: none;
            border: none;
            background: none;
            font-size: 1.4rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 6px;
        }

        .category-banner {
            position: relative;
            background: linear-gradient(135deg, #0b1a35 0%, #142d54 55%, #1d3b6e 100%);
            padding: 96px 0 72px;
            color: #fff;
            overflow: hidden;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.35;
        }

        .category-banner::after {
            content: '';
            position: absolute;
            bottom: -80px;
            right: -40px;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: rgba(15, 107, 255, 0.15);
            filter: blur(80px);
            pointer-events: none;
        }

        .category-banner .container {
            position: relative;
            z-index: 2;
        }

        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.18);
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .category-banner h1 {
            font-size: 2.6rem;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 1px;
            max-width: 640px;
        }

        .category-banner p.lead {
            font-size: 1.15rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin-bottom: 32px;
        }

        .banner-stats {
            display: flex;
            gap: 36px;
            flex-wrap: wrap;
            margin-top: 16px;
        }

        .banner-stats .stat-item {
            text-align: left;
        }

        .banner-stats .stat-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .banner-stats .stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }

        .breadcrumb i {
            font-size: 0.7rem;
            opacity: 0.6;
        }

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

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

        .section-head {
            text-align: center;
            max-width: 620px;
            margin: 0 auto 52px;
        }

        .section-eyebrow {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.82rem;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 40px;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .section-head h2 {
            font-size: 2rem;
            margin-bottom: 14px;
        }

        .section-head p {
            font-size: 1rem;
            color: var(--text-light);
            line-height: 1.7;
        }

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

        .guide-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-fast);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(15, 107, 255, 0.2);
        }

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

        .guide-card .card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

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

        .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            padding: 5px 14px;
            border-radius: 30px;
            font-size: 0.78rem;
            font-weight: 700;
            color: var(--primary);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        }

        .guide-card .card-body-custom {
            padding: 26px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .guide-card .card-body-custom h3 {
            font-size: 1.2rem;
            margin-bottom: 12px;
            line-height: 1.45;
        }

        .guide-card .card-body-custom p {
            font-size: 0.92rem;
            line-height: 1.75;
            color: var(--text-light);
            margin-bottom: 18px;
            flex: 1;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.82rem;
            color: var(--text-light);
            margin-bottom: 16px;
        }

        .card-meta i {
            margin-right: 4px;
            color: var(--primary);
        }

        .card-footer-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            font-weight: 700;
            color: var(--primary);
            transition: gap var(--transition-fast);
        }

        .card-footer-link:hover {
            gap: 12px;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            margin-top: 20px;
        }

        .step-item {
            text-align: center;
            padding: 36px 24px;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition-normal), box-shadow var(--transition-normal);
        }

        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .step-num {
            width: 52px;
            height: 52px;
            margin: 0 auto 18px;
            background: linear-gradient(135deg, var(--primary), #4d94ff);
            color: #fff;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            box-shadow: 0 8px 20px rgba(15, 107, 255, 0.2);
        }

        .step-item h3 {
            font-size: 1.05rem;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .knowledge-card {
            display: flex;
            gap: 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 26px;
            transition: all var(--transition-normal);
        }

        .knowledge-card:hover {
            border-color: rgba(15, 107, 255, 0.3);
            box-shadow: var(--shadow-md);
        }

        .knowledge-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .knowledge-card h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }

        .knowledge-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
            line-height: 1.7;
        }

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 26px 30px;
            margin-bottom: 16px;
            transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: rgba(15, 107, 255, 0.2);
        }

        .faq-item h3 {
            font-size: 1.05rem;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .faq-item h3 i {
            color: var(--primary);
            font-size: 0.9rem;
        }

        .faq-item p {
            margin-bottom: 0;
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.75;
            padding-left: 28px;
        }

        .cta-section {
            background: linear-gradient(135deg, #0a0f1e, #0f6bff);
            border-radius: var(--radius-lg);
            padding: 64px 56px;
            position: relative;
            overflow: hidden;
            text-align: center;
            color: #fff;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
        }

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

        .cta-section h2 {
            color: #fff;
            font-size: 1.8rem;
            margin-bottom: 14px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1rem;
            max-width: 600px;
            margin: 0 auto 30px;
        }

        .cta-btn {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 1rem;
            box-shadow: 0 8px 24px rgba(255, 106, 61, 0.35);
            transition: all var(--transition-fast);
        }

        .cta-btn:hover {
            background: var(--accent-dark);
            transform: translateY(-3px);
            box-shadow: 0 14px 30px rgba(255, 106, 61, 0.45);
        }

        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.6);
            padding: 72px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 0.8fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .brand-logo-light {
            color: #fff;
        }

        .brand-logo-light .logo-icon {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            box-shadow: 0 4px 14px rgba(15, 107, 255, 0.3);
        }

        .footer-brand p {
            margin: 18px 0 22px;
            font-size: 0.9rem;
            line-height: 1.8;
            max-width: 280px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.95rem;
            transition: all var(--transition-fast);
        }

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

        .footer-links-col h3,
        .footer-contact h3 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-links-col h3::after,
        .footer-contact h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .footer-links-col a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: all var(--transition-fast);
        }

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

        .footer-contact p {
            font-size: 0.9rem;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact p i {
            color: var(--primary);
            width: 16px;
        }

        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
        }

        .footer-bottom p {
            margin: 0;
        }

        .hot-topics {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-top: 24px;
        }

        .topic-badge {
            display: inline-block;
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 40px;
            padding: 8px 22px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-dark);
            transition: all var(--transition-fast);
        }

        .topic-badge:hover {
            border-color: var(--primary);
            background: var(--primary-light);
            color: var(--primary);
        }

        .topic-badge i {
            margin-right: 6px;
            color: var(--accent);
        }

        @media (max-width: 1024px) {
            :root {
                --space-section: 64px;
            }

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

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

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

        @media (max-width: 768px) {
            .site-header {
                height: 60px;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: 60px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px 20px;
                gap: 6px;
                box-shadow: 0 16px 40px rgba(0, 0, 0, 0.1);
                border-bottom: 1px solid var(--border-color);
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav .nav-link {
                padding: 12px 18px;
                border-radius: 12px;
                font-size: 0.95rem;
            }

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

            .mobile-menu-btn {
                display: block;
            }

            .category-banner {
                padding: 64px 0 50px;
            }

            .category-banner h1 {
                font-size: 1.9rem;
            }

            .category-banner p.lead {
                font-size: 1rem;
            }

            .banner-stats {
                gap: 24px;
            }

            .banner-stats .stat-num {
                font-size: 1.4rem;
            }

            .section-head h2 {
                font-size: 1.6rem;
            }

            .category-cards-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

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

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

            .cta-section {
                padding: 44px 28px;
            }

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

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

            .faq-item {
                padding: 20px 22px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }

            .category-banner h1 {
                font-size: 1.6rem;
            }

            .banner-stats {
                flex-direction: column;
                gap: 14px;
            }

            .banner-stats .stat-item {
                display: flex;
                align-items: baseline;
                gap: 10px;
            }

            .banner-stats .stat-num {
                font-size: 1.3rem;
            }

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

            .knowledge-card {
                flex-direction: column;
                padding: 20px;
            }

            .footer-contact p {
                flex-wrap: wrap;
            }
        }

/* roulang page: article */
:root {
    --primary: #0B2B45;
    --primary-deep: #071C31;
    --primary-soft: #123A5C;
    --accent: #00A8E8;
    --accent-600: #0089C7;
    --accent-soft: #E5F6FD;
    --aux: #FFB74D;
    --aux-600: #F59E2A;
    --bg: #F4F7FB;
    --bg-white: #FFFFFF;
    --text: #16202B;
    --text-body: #3E4C59;
    --text-light: #6B7A88;
    --border: #DFE7EF;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 8px;
    --shadow-sm: 0 2px 10px rgba(11, 43, 69, 0.06);
    --shadow-md: 0 8px 28px rgba(11, 43, 69, 0.09);
    --shadow-lg: 0 16px 44px rgba(11, 43, 69, 0.14);
    --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    --container-w: 1200px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.75;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; height: auto; }
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-600); }
button, input, textarea { font-family: inherit; font-size: inherit; }
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; width: 100%; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 15px;
    line-height: 1.4;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    letter-spacing: 0.01em;
}
.btn i { font-size: 14px; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-soft); border-color: var(--primary-soft); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-accent { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-accent:hover { background: var(--accent-600); border-color: var(--accent-600); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 28px rgba(0, 168, 232, 0.28); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-block { display: flex; width: 100%; }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn:focus-visible, .nav-link:focus-visible, .tag:focus-visible, a:focus-visible { outline: 3px solid rgba(0, 168, 232, 0.5); outline-offset: 2px; }
.badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 5px 14px; border-radius: 50px; font-size: 13px; font-weight: 600;
}
.badge-accent { background: var(--accent-soft); color: var(--accent-600); border: 1px solid rgba(0, 168, 232, 0.2); }
.badge-primary { background: rgba(11, 43, 69, 0.08); color: var(--primary); }
/* ===== Header / Nav ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(11, 43, 69, 0.06);
    box-shadow: 0 2px 14px rgba(11, 43, 69, 0.05);
    height: 72px;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.brand-logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-logo-light { color: #fff; }
.brand-logo-light:hover { color: #fff; }
.logo-icon {
    display: flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; border-radius: 12px;
    background: linear-gradient(135deg, var(--accent), var(--primary));
    color: #fff; font-size: 17px;
    box-shadow: 0 4px 14px rgba(0, 168, 232, 0.3);
}
.logo-text { font-size: 21px; font-weight: 800; letter-spacing: 0.01em; color: var(--primary); }
.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
    padding: 8px 16px;
    border-radius: 50px;
    font-weight: 600;
    color: var(--text-body);
    font-size: 15px;
    transition: var(--transition);
    position: relative;
    background: transparent;
}
.nav-link:hover { background: rgba(11, 43, 69, 0.05); color: var(--primary); }
.nav-link.active { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(11, 43, 69, 0.2); }
.nav-link.active:hover { background: var(--primary-soft); }
.header-actions { display: flex; align-items: center; gap: 14px; }
.header-cta { border-radius: 50px; box-shadow: 0 4px 16px rgba(0, 168, 232, 0.22); }
.nav-toggle {
    display: none;
    background: var(--primary);
    color: #fff;
    border: none;
    width: 40px; height: 40px;
    border-radius: 12px;
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
    align-items: center;
    justify-content: center;
}
.nav-toggle:hover { background: var(--primary-soft); transform: scale(1.04); }
/* ===== Breadcrumb ===== */
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 14px; color: rgba(255,255,255,0.8); margin-bottom: 24px; }
.breadcrumb a { color: rgba(255,255,255,0.75); font-weight: 500; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb-sep { font-size: 11px; opacity: 0.7; }
.breadcrumb-current { color: #fff; font-weight: 600; }
/* ===== Article Hero ===== */
.article-hero {
    position: relative;
    background-size: cover;
    background-position: center;
    padding: 96px 0 72px;
    color: #fff;
}
.article-hero::before {
    content: "";
    position: absolute; inset: 0;
    background: linear-gradient(96deg, rgba(7, 28, 49, 0.94) 0%, rgba(11, 43, 69, 0.82) 55%, rgba(0, 168, 232, 0.42) 100%);
}
.article-hero .container { position: relative; z-index: 1; }
.article-head { max-width: 860px; }
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-bottom: 18px; }
.meta-item { font-size: 14px; color: rgba(255,255,255,0.82); display: inline-flex; align-items: center; gap: 6px; }
.meta-item i { font-size: 14px; }
.article-head h1 {
    font-size: clamp(28px, 4.2vw, 46px);
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.01em;
    margin-bottom: 16px;
}
.article-summary { font-size: 17px; line-height: 1.75; color: rgba(255,255,255,0.85); max-width: 720px; }
/* ===== Article Body ===== */
.article-body-section { padding: 64px 0 50px; }
.article-card { background: var(--bg-white); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: 44px 52px; border: 1px solid var(--border); }
.article-content { font-size: 16.5px; line-height: 1.9; color: var(--text-body); }
.article-content > * + * { margin-top: 20px; }
.article-content h2 { font-size: 24px; font-weight: 750; color: var(--primary); margin-top: 36px; border-left: 4px solid var(--accent); padding-left: 16px; line-height: 1.45; }
.article-content h3 { font-size: 19px; font-weight: 700; color: var(--primary); margin-top: 28px; }
.article-content p { line-height: 1.85; }
.article-content ul, .article-content ol { padding-left: 8px; }
.article-content li { margin-bottom: 8px; }
.article-content li::marker { color: var(--accent); }
.article-content blockquote { background: var(--accent-soft); border-left: 4px solid var(--accent); border-radius: 0 12px 12px 0; padding: 18px 24px; color: var(--primary); font-style: normal; margin: 24px 0; }
.article-content blockquote p { margin: 0; }
.article-content img { border-radius: var(--radius-md); margin: 24px 0; }
.article-content a { font-weight: 600; border-bottom: 1px solid rgba(0, 168, 232, 0.3); padding-bottom: 1px; }
.article-content a:hover { border-bottom-color: var(--accent); }
.not-found { text-align: center; padding: 60px 20px; }
.not-found-icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 76px; height: 76px; border-radius: 50%;
    background: var(--accent-soft); color: var(--accent); font-size: 30px;
    margin-bottom: 24px;
}
.not-found h2 { font-size: 26px; font-weight: 800; color: var(--primary); margin-bottom: 12px; }
.not-found p { color: var(--text-light); max-width: 400px; margin: 0 auto 28px; }
.article-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); }
.tag-label { font-size: 14px; color: var(--text-light); font-weight: 600; }
.tag {
    display: inline-flex; align-items: center;
    background: var(--bg); border: 1px solid var(--border);
    color: var(--text-body); border-radius: 50px;
    padding: 5px 14px; font-size: 13px; font-weight: 600;
    transition: var(--transition);
}
.tag:hover { background: var(--accent); border-color: var(--accent); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0, 168, 232, 0.25); }
/* ===== Sidebar ===== */
.sidebar { display: flex; flex-direction: column; gap: 24px; position: sticky; top: 96px; }
.sider-card { background: var(--bg-white); border-radius: var(--radius-md); border: 1px solid var(--border); padding: 28px; box-shadow: var(--shadow-sm); }
.sider-card h3 { font-size: 17px; font-weight: 750; color: var(--primary); margin-bottom: 12px; position: relative; padding-bottom: 10px; }
.sider-card h3::after { content: ""; position: absolute; left: 0; bottom: 0; width: 30px; height: 3px; background: var(--accent); border-radius: 3px; }
.sider-card p { font-size: 14.5px; color: var(--text-light); margin-bottom: 18px; }
.sider-cat { background: linear-gradient(145deg, var(--primary), var(--primary-soft)); border: none; }
.sider-cat h3 { color: #fff; }
.sider-cat h3::after { background: var(--aux); }
.sider-cat p { color: rgba(255,255,255,0.8); }
.sider-cat .btn-outline { border-color: rgba(255,255,255,0.4); color: #fff; }
.sider-cat .btn-outline:hover { background: #fff; color: var(--primary); }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.sider-cta { padding: 0; overflow: hidden; border: none; box-shadow: var(--shadow-md); }
.sider-cta img { width: 100%; height: 150px; object-fit: cover; }
.sider-cta .sider-cta-body { padding: 24px; }
.sider-cta h3 { font-size: 18px; }
.sider-cta p { font-size: 14px; }
.sider-cta .btn { margin-top: 6px; }
/* ===== Related ===== */
.related-section { padding: 70px 0 64px; background: var(--bg-white); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { text-align: center; margin-bottom: 44px; }
.section-eyebrow { display: inline-block; font-size: 13px; font-weight: 700; color: var(--accent); background: var(--accent-soft); padding: 4px 14px; border-radius: 50px; margin-bottom: 12px; letter-spacing: 0.06em; }
.section-head h2 { font-size: clamp(26px, 3vw, 34px); font-weight: 800; color: var(--primary); line-height: 1.35; }
.section-head p { color: var(--text-light); font-size: 15.5px; margin-top: 8px; }
.related-card { height: 100%; display: flex; flex-direction: column; background: var(--bg-white); border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); transition: var(--transition); }
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(0, 168, 232, 0.25); }
.related-card .rel-thumb { position: relative; overflow: hidden; aspect-ratio: 16 / 10; }
.related-card .rel-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.related-card:hover .rel-thumb img { transform: scale(1.06); }
.related-card .rel-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.related-card .rel-body h3 { font-size: 17px; font-weight: 750; color: var(--primary); line-height: 1.45; margin-bottom: 8px; }
.related-card .rel-body p { font-size: 14px; color: var(--text-light); line-height: 1.65; margin-bottom: 16px; }
.related-card .rel-link { margin-top: auto; font-weight: 700; font-size: 14px; color: var(--accent); display: inline-flex; align-items: center; gap: 6px; }
.related-card .rel-link i { transition: transform 0.3s; font-size: 12px; }
.related-card:hover .rel-link i { transform: translateX(4px); }
/* ===== FAQ ===== */
.faq-section { padding: 70px 0; background: var(--bg); }
.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.faq-item { background: var(--bg-white); border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); transition: var(--transition); }
.faq-item:hover { border-color: rgba(0, 168, 232, 0.3); box-shadow: var(--shadow-md); }
.faq-q { display: flex; align-items: center; gap: 12px; padding: 20px 24px; cursor: pointer; font-weight: 700; color: var(--primary); font-size: 16px; }
.faq-q i { color: var(--accent); font-size: 17px; flex-shrink: 0; }
.faq-q::after { content: "\f067"; font-family: "Font Awesome 6 Free"; font-weight: 900; font-size: 13px; margin-left: auto; color: var(--text-light); transition: transform 0.3s; }
.faq-item.open .faq-q::after { content: "\f068"; color: var(--accent); }
.faq-a { display: none; padding: 0 24px 20px 54px; color: var(--text-body); font-size: 15px; line-height: 1.8; }
.faq-item.open .faq-a { display: block; }
/* ===== CTA ===== */
.cta-banner { position: relative; background: var(--primary-deep); padding: 80px 0; color: #fff; overflow: hidden; }
.cta-banner::before { content: ""; position: absolute; inset: 0; background: url('/assets/images/backpic/back-3.png') center/cover no-repeat; opacity: 0.2; }
.cta-banner::after { content: ""; position: absolute; top: -60px; right: -80px; width: 320px; height: 320px; background: radial-gradient(circle, rgba(0,168,232,0.35), transparent 65%); }
.cta-banner .container { position: relative; z-index: 1; }
.cta-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 48px; align-items: center; }
.cta-info h2 { font-size: clamp(24px, 3vw, 36px); font-weight: 800; line-height: 1.35; margin-bottom: 16px; }
.cta-info p { font-size: 16px; color: rgba(255,255,255,0.8); max-width: 560px; }
.cta-card { background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.16); border-radius: var(--radius-lg); padding: 32px; backdrop-filter: blur(8px); }
.cta-card h3 { font-size: 18px; font-weight: 750; margin-bottom: 14px; }
.cta-card p { font-size: 14.5px; color: rgba(255,255,255,0.75); margin-bottom: 20px; }
.cta-actions { display: flex; flex-direction: column; gap: 12px; }
.cta-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 28px; border-radius: 50px; font-weight: 700; font-size: 15px; background: var(--aux); color: var(--primary-deep); transition: var(--transition); }
.cta-btn:hover { background: #ffc86b; color: var(--primary-deep); transform: translateY(-2px); box-shadow: 0 10px 28px rgba(255, 183, 77, 0.3); }
.cta-outline-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 26px; border-radius: 50px; font-weight: 600; font-size: 14px; border: 1px solid rgba(255,255,255,0.4); color: #fff; transition: var(--transition); }
.cta-outline-btn:hover { background: rgba(255,255,255,0.1); color: #fff; border-color: #fff; }
/* ===== Footer ===== */
.site-footer { background: var(--primary-deep); color: rgba(255,255,255,0.75); padding: 70px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 40px; padding-bottom: 40px; }
.footer-brand p { font-size: 14.5px; line-height: 1.75; margin-top: 16px; max-width: 340px; }
.footer-social { display: flex; gap: 12px; margin-top: 20px; }
.footer-social a { display: flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: 50%; background: rgba(255,255,255,0.08); color: #fff; font-size: 15px; transition: var(--transition); }
.footer-social a:hover { background: var(--accent); color: #fff; transform: translateY(-3px); }
.footer-links-col h3 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-links-col a { display: block; color: rgba(255,255,255,0.65); font-size: 14px; margin-bottom: 10px; padding: 2px 0; transition: var(--transition); }
.footer-links-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact h3 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-contact p { font-size: 14px; margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.footer-contact p i { color: var(--accent); width: 16px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 24px 0; text-align: center; font-size: 13.5px; color: rgba(255,255,255,0.5); }
.footer-bottom p { margin: 0; }
/* ===== Responsive ===== */
@media screen and (max-width: 1024px) {
    .article-card { padding: 36px 34px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .cta-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media screen and (max-width: 840px) {
    .site-header { height: 64px; }
    .header-inner { height: 64px; }
    .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 16px 24px 24px;
        gap: 4px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 20px 40px rgba(11, 43, 69, 0.12);
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.35s ease, opacity 0.3s ease, visibility 0s 0.3s;
        border-radius: 0 0 20px 20px;
    }
    .main-nav.mobile-open { transform: translateY(0); opacity: 1; visibility: visible; transition: transform 0.35s ease, opacity 0.3s ease; }
    .nav-link { padding: 14px 16px; border-radius: 12px; font-size: 16px; text-align: center; }
    .nav-toggle { display: inline-flex; }
    .header-cta { display: none; }
    .article-hero { padding: 64px 0 50px; }
    .article-body-section { padding: 40px 0 40px; }
    .sidebar { position: static; margin-top: 24px; }
    .related-section, .faq-section { padding: 48px 0; }
    .cta-banner { padding: 60px 0; }
    .cta-actions { flex-direction: row; flex-wrap: wrap; }
}
@media screen and (max-width: 640px) {
    .container { padding: 0 18px; }
    .article-hero { padding: 50px 0 42px; }
    .article-card { padding: 28px 22px; border-radius: 16px; }
    .article-content { font-size: 15.5px; }
    .article-content h2 { font-size: 21px; }
    .article-content h3 { font-size: 18px; }
    .article-head h1 { font-size: 28px; }
    .article-summary { font-size: 15px; }
    .article-meta { gap: 10px; }
    .meta-item { font-size: 13px; }
    .breadcrumb { font-size: 13px; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .related-card .rel-body { padding: 20px; }
    .faq-q { padding: 16px 18px; font-size: 15px; }
    .faq-a { padding: 0 18px 18px 44px; }
    .cta-grid { gap: 24px; }
    .cta-card { padding: 24px; }
    .grid-margin-x > .cell { margin-bottom: 0; }
}
@media screen and (max-width: 520px) {
    .brand-logo .logo-text { font-size: 18px; }
    .article-body-section .grid-margin-x { margin: 0; }
    .article-body-section .cell { padding: 0 18px; }
    .article-body-section .cell + .cell { padding-top: 24px; }
    .tag-cloud .tag { font-size: 13px; padding: 4px 12px; }
    .section-head h2 { font-size: 24px; }
    .cta-actions { flex-direction: column; }
    .cta-btn, .cta-outline-btn { width: 100%; }
}