/* roulang page: index */
:root {
  --primary: #1a3a5c;
  --primary-dark: #0f2942;
  --primary-light: #2d5a88;
  --accent: #e8a540;
  --accent-hover: #d49435;
  --accent-soft: rgba(232, 165, 64, 0.15);
  --bg: #f4f6f9;
  --bg-white: #ffffff;
  --bg-dark: #0f1e2e;
  --text: #1a2233;
  --text-light: #5b6b7c;
  --text-muted: #8a97a6;
  --border: #e3e8ee;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(15, 30, 46, 0.06);
  --shadow-md: 0 6px 20px rgba(15, 30, 46, 0.08);
  --shadow-lg: 0 16px 40px rgba(15, 30, 46, 0.12);
  --transition: all 0.3s ease;
  --sidebar-width: 260px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}

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

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

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

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

/* Layout */
.app-wrapper {
  min-height: 100vh;
}

.main-content {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

@media (max-width: 991.98px) {
  .main-content {
    margin-left: 0;
  }
}

.container {
  max-width: 1280px;
  padding-left: 24px;
  padding-right: 24px;
}

/* Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: linear-gradient(180deg, #0f1e2e 0%, #152a3f 100%);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  z-index: 1040;
  overflow-y: auto;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 48px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo-icon {
  width: 42px;
  height: 42px;
  background: var(--accent);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  font-size: 20px;
  font-weight: 800;
  flex-shrink: 0;
}

.sidebar-logo-text {
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
}

.sidebar-logo-sub {
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
  margin-top: 2px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sidebar-nav .nav-label {
  color: rgba(255, 255, 255, 0.4);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
  padding-left: 12px;
  font-weight: 600;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(255, 255, 255, 0.75);
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  border-left: 3px solid transparent;
}

.sidebar-nav a i {
  width: 20px;
  text-align: center;
  font-size: 16px;
}

.sidebar-nav a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.sidebar-nav a.active {
  color: #fff;
  background: rgba(232, 165, 64, 0.15);
  border-left-color: var(--accent);
  font-weight: 600;
}

.sidebar-nav a.active i {
  color: var(--accent);
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.4);
  font-size: 12px;
  line-height: 1.6;
}

/* Mobile header */
.mobile-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: var(--bg-dark);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-header .mobile-logo {
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.mobile-header .mobile-logo span {
  background: var(--accent);
  color: var(--primary-dark);
  width: 30px;
  height: 30px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
}

.mobile-header .btn-nav-trigger {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: var(--transition);
}

.mobile-header .btn-nav-trigger:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* Offcanvas */
.offcanvas {
  max-width: 280px;
  background: var(--bg-dark);
  color: #fff;
}

.offcanvas-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px;
}

.offcanvas .btn-close {
  filter: invert(1) grayscale(100%) brightness(200%);
}

.offcanvas-body {
  padding: 16px 20px;
}

.offcanvas-body a {
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(255, 255, 255, 0.8);
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
}

.offcanvas-body a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.offcanvas-body a.active {
  color: #fff;
  background: rgba(232, 165, 64, 0.18);
  border-left: 3px solid var(--accent);
}

/* Hero */
.hero-section {
  position: relative;
  background: linear-gradient(135deg, rgba(15, 30, 46, 0.85) 0%, rgba(15, 30, 46, 0.7) 50%, rgba(26, 58, 92, 0.75) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding: 100px 0 90px;
  color: #fff;
  overflow: hidden;
}

.hero-section::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(180deg, transparent, var(--bg));
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 18px;
  border-radius: 40px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}

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

.hero-title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

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

.hero-desc {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin-bottom: 36px;
  line-height: 1.8;
}

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

.btn-hero-primary {
  background: var(--accent);
  color: var(--primary-dark);
  border: none;
  padding: 14px 32px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition);
}

.btn-hero-primary:hover {
  background: var(--accent-hover);
  color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(232, 165, 64, 0.35);
}

.btn-hero-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.5);
  padding: 14px 32px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition);
}

.btn-hero-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 60px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
}

.hero-stat-item .stat-num {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}

.hero-stat-item .stat-num span {
  color: var(--accent);
}

.hero-stat-item .stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 4px;
}

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

.section-header {
  max-width: 680px;
  margin-bottom: 48px;
}

.section-header .section-tag {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent-hover);
  font-size: 13px;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 30px;
  letter-spacing: 0.03em;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 800;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 12px;
}

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

.section-header.text-center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-header.text-center .section-tag {
  margin-bottom: 14px;
}

/* Feature cards */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 32px 28px;
  border: 1px solid var(--border);
  transition: var(--transition);
  height: 100%;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.feature-icon {
  width: 52px;
  height: 52px;
  background: var(--primary);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 22px;
  margin-bottom: 20px;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: var(--accent);
  color: var(--primary-dark);
}

.feature-card:nth-child(2) .feature-icon {
  background: var(--accent);
  color: var(--primary-dark);
}

.feature-card:nth-child(3) .feature-icon {
  background: var(--primary);
}

.feature-card:nth-child(4) .feature-icon {
  background: var(--accent);
  color: var(--primary-dark);
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 0;
}

/* Category cards */
.cat-card {
  position: relative;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.cat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.cat-card-img {
  position: relative;
  height: 190px;
  overflow: hidden;
}

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

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

.cat-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(15, 30, 46, 0.6) 100%);
}

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

.cat-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

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

.cat-card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary-light);
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
}

.cat-card-link:hover {
  color: var(--accent-hover);
  gap: 12px;
}

/* News List */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.news-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 26px 28px;
  transition: var(--transition);
  display: block;
}

.news-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: transparent;
}

.news-card-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.news-badge {
  background: var(--accent-soft);
  color: var(--accent-hover);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
}

.news-date {
  font-size: 13px;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.news-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.5;
}

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

.news-card-excerpt {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 14px;
}

.news-card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-light);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.news-card:hover .news-card-link {
  color: var(--accent-hover);
  gap: 10px;
}

.empty-state {
  background: var(--bg-white);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 60px 30px;
  text-align: center;
  color: var(--text-light);
}

.empty-state i {
  font-size: 40px;
  color: var(--text-muted);
  margin-bottom: 16px;
  display: block;
}

/* Sidebar */
.latest-sidebar {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.latest-sidebar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--primary-light));
}

.latest-sidebar h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.sidebar-info-item {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

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

.sidebar-info-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-soft);
  color: var(--accent-hover);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  flex-shrink: 0;
}

.sidebar-info-text {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
}

.sidebar-info-text strong {
  display: block;
  font-size: 14px;
  color: var(--text);
  margin-bottom: 2px;
}

.sidebar-help {
  background: var(--bg);
  border-radius: 12px;
  padding: 20px;
  margin-top: 20px;
  text-align: center;
}

.sidebar-help p {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 12px;
}

.sidebar-help a {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-light);
}

/* Stats dark section */
.stats-section {
  background: linear-gradient(135deg, rgba(15, 30, 46, 0.92), rgba(26, 58, 92, 0.88)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: #fff;
  padding: 80px 0;
  position: relative;
}

.stats-section .section-header h2 {
  color: #fff;
}

.stats-section .section-header p {
  color: rgba(255, 255, 255, 0.7);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}

.stat-box {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 36px 20px;
  transition: var(--transition);
}

.stat-box:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}

.stat-box .stat-icon {
  font-size: 32px;
  color: var(--accent);
  margin-bottom: 16px;
}

.stat-box .stat-number {
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 8px;
}

.stat-box .stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
}

/* Process steps */
.process-section {
  background: var(--bg-white);
}

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

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

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

.process-item .step-num {
  width: 56px;
  height: 56px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  margin: 0 auto 20px;
  border: 4px solid var(--bg);
  box-shadow: 0 4px 12px rgba(26, 58, 92, 0.2);
}

.process-item:nth-child(even) .step-num {
  background: var(--accent);
  color: var(--primary-dark);
}

.process-item h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
}

.process-item p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: 0;
}

/* FAQ */
.faq-section {
  background: var(--bg);
}

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

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

.faq-item:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: var(--transition);
  user-select: none;
}

.faq-question i {
  color: var(--primary-light);
  font-size: 14px;
  transition: var(--transition);
  flex-shrink: 0;
}

.faq-item.open .faq-question {
  color: var(--primary-light);
}

.faq-item.open .faq-question i {
  transform: rotate(180deg);
  color: var(--accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  padding: 0 24px;
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 24px 20px;
}

.faq-answer p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 0;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

/* CTA */
.cta-section {
  background: linear-gradient(135deg, rgba(26, 58, 92, 0.9), rgba(15, 30, 46, 0.85)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  padding: 80px 0;
  color: #fff;
  text-align: center;
}

.cta-section h2 {
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.75);
  max-width: 560px;
  margin: 0 auto 36px;
}

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

/* Footer */
.footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.6);
  padding: 50px 0 24px;
  font-size: 14px;
}

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

.footer p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.7;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

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

.footer-links a {
  color: rgba(255, 255, 255, 0.55);
  font-size: 14px;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  margin-top: 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* Responsive */
@media (max-width: 1199.98px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 991.98px) {
  .section {
    padding: 60px 0;
  }
  .hero-section {
    padding: 80px 0 70px;
  }
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }
}

@media (max-width: 767.98px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .process-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .stat-box .stat-number {
    font-size: 28px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .btn-hero-primary, .btn-hero-outline {
    justify-content: center;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 520px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .hero-section {
    padding: 60px 0 60px;
  }
  .hero-title {
    font-size: 30px;
  }
  .hero-desc {
    font-size: 15px;
  }
  .news-card {
    padding: 20px;
  }
}

/* Focus states */
a:focus-visible, button:focus-visible {
  outline: 3px solid rgba(232, 165, 64, 0.5);
  outline-offset: 2px;
}

/* Buttons base */
.btn-custom-primary {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.btn-custom-primary:hover {
  background: var(--primary-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(26, 58, 92, 0.3);
}

.btn-custom-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.btn-custom-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(26, 58, 92, 0.25);
}

/* Tooltip-like labels used in sections */
.content-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-light);
}

/* roulang page: category1 */
:root {
            --primary: #2b5ce6;
            --primary-dark: #1e3f8f;
            --primary-light: #5b82f0;
            --accent: #f0a500;
            --accent-light: #ffd166;
            --bg-body: #f5f7fb;
            --bg-card: #ffffff;
            --bg-dark: #0f1b2d;
            --text-main: #1c2b42;
            --text-muted: #65748a;
            --border-color: #e3e9f1;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(20, 32, 58, .06);
            --shadow-md: 0 8px 24px rgba(20, 32, 58, .08);
            --shadow-lg: 0 16px 40px rgba(20, 32, 58, .12);
            --sidebar-width: 260px;
            --transition: .25s ease;
        }

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

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
        }

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

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

        button {
            cursor: pointer;
        }

        :focus-visible {
            outline: 3px solid rgba(43, 92, 230, .35);
            outline-offset: 2px;
            border-radius: 6px;
        }

        .app-shell {
            min-height: 100vh;
        }

        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: var(--bg-card);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1040;
            padding: 24px 16px;
        }

        .app-main {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .main-content {
            flex: 1;
        }

        .app-container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 32px;
        }

        .sidebar-brand {
            padding: 8px 10px 22px;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 18px;
        }

        .brand-link {
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 4px;
        }

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

        .brand-domain {
            font-size: .78rem;
            color: var(--text-muted);
            margin-top: 6px;
            letter-spacing: .02em;
        }

        .sidebar-nav .nav-label {
            font-size: .72rem;
            font-weight: 700;
            letter-spacing: .14em;
            text-transform: uppercase;
            color: var(--text-muted);
            padding: 0 10px;
            margin-bottom: 10px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 14px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-weight: 500;
            margin-bottom: 4px;
            transition: all var(--transition);
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
        }

        .sidebar-nav a:hover {
            background: #f0f3fa;
            color: var(--primary);
        }

        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 16px rgba(43, 92, 230, .25);
        }

        .sidebar-footer {
            margin-top: auto;
            padding-top: 16px;
            border-top: 1px solid var(--border-color);
        }

        .sidebar-info {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: .82rem;
            color: var(--text-muted);
            padding: 0 10px;
        }

        .sidebar-info i {
            color: var(--accent);
        }

        .mobile-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
            padding: 12px 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .mobile-logo {
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--text-main);
            letter-spacing: -.02em;
        }

        .menu-toggle {
            border: 0;
            background: transparent;
            font-size: 1.3rem;
            color: var(--text-main);
            padding: 4px 10px;
            border-radius: 8px;
            line-height: 1;
        }

        .menu-toggle:hover {
            background: #f0f3fa;
        }

        .app-offcanvas {
            width: 280px !important;
        }

        .app-offcanvas .offcanvas-body {
            padding: 20px 16px;
        }

        .offcanvas-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .offcanvas-nav .nav-label {
            font-size: .72rem;
            font-weight: 700;
            letter-spacing: .14em;
            text-transform: uppercase;
            color: var(--text-muted);
            padding: 0 10px;
            margin-bottom: 6px;
        }

        .offcanvas-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 14px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-weight: 500;
            transition: all var(--transition);
        }

        .offcanvas-nav a i {
            width: 20px;
            text-align: center;
        }

        .offcanvas-nav a:hover {
            background: #f0f3fa;
            color: var(--primary);
        }

        .offcanvas-nav a.active {
            background: var(--primary);
            color: #fff;
        }

        .page-banner {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 27, 45, .92), rgba(43, 92, 230, .82)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 84px 0 72px;
            color: #fff;
            border-bottom: 4px solid var(--accent);
        }

        .breadcrumb-custom {
            font-size: .85rem;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, .75);
        }

        .breadcrumb-custom a {
            color: rgba(255, 255, 255, .75);
            transition: color var(--transition);
        }

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

        .breadcrumb-custom i {
            font-size: .7rem;
            margin: 0 2px;
        }

        .banner-title {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -.02em;
        }

        .banner-desc {
            font-size: 1.08rem;
            opacity: .92;
            max-width: 680px;
            margin-bottom: 32px;
        }

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

        .btn-brand {
            background: var(--accent);
            color: #1c2b42;
            font-weight: 700;
            border: 0;
            padding: 12px 28px;
            border-radius: 50px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all var(--transition);
        }

        .btn-brand:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-outline-light {
            border: 2px solid rgba(255, 255, 255, .7);
            color: #fff;
            padding: 10px 24px;
            border-radius: 50px;
            background: transparent;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all var(--transition);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .15);
            border-color: #fff;
        }

        .section {
            padding: 72px 0;
        }

        .section-alt {
            background: #fff;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

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

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(43, 92, 230, .08);
            color: var(--primary);
            font-size: .8rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 50px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -.02em;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .section-subtitle {
            max-width: 720px;
            color: var(--text-muted);
            font-size: .98rem;
        }

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

        .stat-card {
            text-align: center;
            padding: 30px 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: all var(--transition);
        }

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

        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-label {
            color: var(--text-muted);
            margin-top: 8px;
            font-size: .9rem;
        }

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

        .feature-card {
            height: 100%;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            position: relative;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }

        .feature-thumb {
            height: 146px;
            overflow: hidden;
            position: relative;
            background: #eef1f6;
        }

        .feature-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .45s ease;
        }

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

        .feature-icon {
            position: absolute;
            top: auto;
            bottom: -22px;
            left: 20px;
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            box-shadow: 0 8px 20px rgba(43, 92, 230, .35);
            z-index: 2;
        }

        .feature-body {
            padding: 32px 22px 24px;
        }

        .feature-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .feature-desc {
            color: var(--text-muted);
            font-size: .92rem;
            line-height: 1.7;
        }

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

        .process-step {
            position: relative;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 26px 22px;
            transition: all var(--transition);
        }

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

        .step-badge {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 16px;
            box-shadow: 0 6px 14px rgba(240, 165, 0, .35);
        }

        .step-title {
            font-weight: 700;
            font-size: 1.02rem;
            margin-bottom: 8px;
        }

        .step-desc {
            font-size: .89rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        .guide-list {
            display: grid;
            gap: 18px;
        }

        .guide-item {
            display: flex;
            gap: 18px;
            align-items: center;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 16px;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }

        .guide-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
            transform: translateX(4px);
        }

        .guide-thumb {
            width: 128px;
            height: 96px;
            border-radius: 10px;
            object-fit: cover;
            flex-shrink: 0;
            background: #eef1f6;
        }

        .guide-info {
            flex: 1;
            min-width: 0;
        }

        .guide-meta {
            font-size: .8rem;
            color: var(--text-muted);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .guide-meta .badge-tag {
            background: rgba(43, 92, 230, .08);
            color: var(--primary);
            font-size: .72rem;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 50px;
        }

        .guide-title {
            font-weight: 700;
            font-size: 1.05rem;
            margin-bottom: 4px;
            transition: color var(--transition);
        }

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

        .guide-desc {
            font-size: .9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .custom-accordion .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            overflow: hidden;
            margin-bottom: 12px;
            box-shadow: var(--shadow-sm);
        }

        .custom-accordion .accordion-button {
            padding: 18px 22px;
            font-weight: 600;
            background: var(--bg-card);
            color: var(--text-main);
            font-size: .98rem;
            transition: all var(--transition);
        }

        .custom-accordion .accordion-button:not(.collapsed) {
            background: #f0f3fa;
            color: var(--primary);
            box-shadow: none;
        }

        .custom-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: var(--primary-light);
        }

        .custom-accordion .accordion-body {
            padding: 6px 22px 20px;
            color: var(--text-muted);
            font-size: .93rem;
            line-height: 1.75;
        }

        .cta-banner {
            background: linear-gradient(135deg, #0f1b2d, #1d3d7a), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            flex-wrap: wrap;
            margin: 0 0 72px;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .cta-banner::after {
            content: "";
            position: absolute;
            top: -50%;
            right: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(240, 165, 0, .18);
            pointer-events: none;
        }

        .cta-title {
            font-size: 1.7rem;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .cta-desc {
            opacity: .85;
            font-size: .95rem;
            max-width: 520px;
        }

        .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, .75);
            padding: 56px 0 24px;
            font-size: .9rem;
        }

        .footer h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: .02em;
        }

        .footer a {
            color: rgba(255, 255, 255, .65);
            transition: all var(--transition);
        }

        .footer a:hover {
            color: #fff;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            gap: 8px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .12);
            padding-top: 20px;
            margin-top: 32px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            color: rgba(255, 255, 255, .5);
            font-size: .8rem;
        }

        @media (max-width: 1199px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

        @media (max-width: 991px) {
            .app-sidebar {
                display: none;
            }

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

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

            .section {
                padding: 56px 0;
            }

            .app-container {
                padding: 0 24px;
            }
        }

        @media (max-width: 767px) {
            .page-banner {
                padding: 56px 0 48px;
            }

            .banner-title {
                font-size: 1.8rem;
            }

            .banner-desc {
                font-size: .98rem;
            }

            .section-title {
                font-size: 1.5rem;
            }

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

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

            .guide-item {
                flex-direction: column;
                align-items: flex-start;
            }

            .guide-thumb {
                width: 100%;
                height: 180px;
            }

            .cta-banner {
                padding: 36px 24px;
                flex-direction: column;
                text-align: center;
            }

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

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

            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-card {
                padding: 20px 12px;
            }

            .stat-number {
                font-size: 1.6rem;
            }

            .cta-banner {
                margin-bottom: 48px;
            }

            .banner-actions {
                width: 100%;
                flex-direction: column;
            }

            .banner-actions .btn-brand,
            .banner-actions .btn-outline-light {
                justify-content: center;
                width: 100%;
            }
        }

/* roulang page: article */
:root{
  --ca-primary:#2563eb;
  --ca-primary-dark:#1d4ed8;
  --ca-accent:#f59e0b;
  --ca-accent-light:#fef3c7;
  --ca-bg:#f1f5f9;
  --ca-surface:#ffffff;
  --ca-text:#0f172a;
  --ca-muted:#64748b;
  --ca-border:#e2e8f0;
  --ca-radius:16px;
  --ca-radius-sm:10px;
  --ca-shadow:0 10px 30px rgba(2,6,23,.06);
  --ca-shadow-lg:0 20px 50px rgba(2,6,23,.12);
  --ca-sidebar-width:260px;
  --ca-font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;font-family:var(--ca-font);background:var(--ca-bg);color:var(--ca-text);line-height:1.6;-webkit-font-smoothing:antialiased;}
a{text-decoration:none;color:var(--ca-primary);transition:color .2s ease;}
a:hover{color:var(--ca-primary-dark);}
img{max-width:100%;height:auto;}
.app-shell{display:flex;min-height:100vh;width:100%;}
.sidebar{width:var(--ca-sidebar-width);position:fixed;top:0;left:0;bottom:0;background:var(--ca-surface);border-right:1px solid var(--ca-border);padding:24px 14px 18px;display:flex;flex-direction:column;z-index:1050;transition:transform .3s ease,box-shadow .3s ease;}
.main-content{flex:1;margin-left:var(--ca-sidebar-width);min-width:0;display:flex;flex-direction:column;}
.sidebar-brand{display:flex;align-items:center;gap:10px;padding:0 10px 20px;border-bottom:1px solid var(--ca-border);margin-bottom:20px;}
.brand-badge{width:40px;height:40px;background:var(--ca-primary);color:#fff;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:800;flex-shrink:0;}
.brand-text{font-size:18px;font-weight:800;color:var(--ca-text);letter-spacing:-.5px;line-height:1.2;}
.nav-label{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--ca-muted);padding:0 10px 10px;font-weight:700;}
.sidebar-nav{overflow-y:auto;}
.sidebar-nav a{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:12px;color:#475569;font-size:15px;font-weight:500;margin-bottom:4px;transition:all .2s ease;border:1px solid transparent;}
.sidebar-nav a i{width:20px;text-align:center;font-size:15px;flex-shrink:0;}
.sidebar-nav a:hover{background:var(--ca-bg);color:var(--ca-primary);transform:translateX(2px);border-color:var(--ca-border);}
.sidebar-nav a.active{background:#eff6ff;color:var(--ca-primary);font-weight:600;border-color:#dbeafe;box-shadow:inset 3px 0 0 var(--ca-primary);}
.sidebar-foot{border-top:1px solid var(--ca-border);padding:16px 10px 0;font-size:12px;color:var(--ca-muted);margin-top:auto;}
.mobile-header{display:none;position:sticky;top:0;z-index:1040;background:var(--ca-surface);border-bottom:1px solid var(--ca-border);padding:12px 16px;align-items:center;gap:12px;}
.mobile-header .sidebar-toggle{background:var(--ca-surface);border:1px solid var(--ca-border);border-radius:10px;color:var(--ca-text);padding:8px 12px;font-size:16px;line-height:1;transition:all .2s;}
.mobile-header .sidebar-toggle:hover{border-color:var(--ca-primary);color:var(--ca-primary);}
.mobile-logo{font-size:17px;font-weight:800;color:var(--ca-text);letter-spacing:-.5px;}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(2,6,23,.5);z-index:1045;opacity:0;pointer-events:none;transition:opacity .3s ease;}
.sidebar-overlay.show{display:block;opacity:1;pointer-events:auto;}
.page-banner{background:linear-gradient(120deg,rgba(15,23,42,.92) 0%,rgba(37,99,235,.78) 100%),url('/assets/images/backpic/back-1.png') center/cover no-repeat;padding:64px 0 56px;color:#fff;}
.page-banner .breadcrumb{background:transparent;padding:0;margin:0 0 16px;}
.page-banner .breadcrumb-item a{color:rgba(255,255,255,.75);}
.page-banner .breadcrumb-item a:hover{color:#fff;}
.page-banner .breadcrumb-item.active{color:rgba(255,255,255,.65);}
.page-banner .breadcrumb-item+.breadcrumb-item::before{color:rgba(255,255,255,.5);}
.banner-title{font-size:34px;font-weight:800;letter-spacing:-.02em;margin:0;}
.banner-sub{font-size:16px;color:rgba(255,255,255,.8);margin-top:8px;max-width:640px;}
.main-wrap{flex:1;}
.article-section{padding:48px 0 20px;}
.article-main{background:var(--ca-surface);border-radius:var(--ca-radius);box-shadow:var(--ca-shadow);padding:32px 36px 40px;border:1px solid var(--ca-border);}
.article-category{display:inline-block;background:var(--ca-accent-light);color:#b45309;padding:5px 16px;border-radius:30px;font-size:13px;font-weight:700;margin-bottom:16px;}
.article-title{font-size:30px;font-weight:800;line-height:1.35;margin:0 0 16px;letter-spacing:-.02em;color:var(--ca-text);}
.article-meta{display:flex;flex-wrap:wrap;gap:16px;color:var(--ca-muted);font-size:14px;padding-bottom:20px;border-bottom:1px solid var(--ca-border);margin-bottom:26px;}
.article-meta span{display:inline-flex;align-items:center;gap:6px;}
.article-meta i{color:var(--ca-primary);width:16px;text-align:center;}
.article-cover{border-radius:14px;margin-bottom:28px;width:100%;object-fit:cover;aspect-ratio:16/8;box-shadow:var(--ca-shadow);}
.article-content{font-size:16px;line-height:1.9;color:#334155;overflow-wrap:break-word;}
.article-content h2{font-size:22px;font-weight:700;color:var(--ca-text);margin:36px 0 16px;padding-bottom:10px;border-bottom:1px solid var(--ca-border);}
.article-content h3{font-size:18px;font-weight:700;color:var(--ca-text);margin:28px 0 12px;}
.article-content p{margin-bottom:20px;word-wrap:break-word;}
.article-content ul,.article-content ol{margin-bottom:20px;padding-left:24px;}
.article-content li{margin-bottom:8px;}
.article-content img{border-radius:12px;margin:20px 0;}
.article-content blockquote{border-left:4px solid var(--ca-accent);background:var(--ca-accent-light);padding:16px 20px;border-radius:0 12px 12px 0;margin:24px 0;color:#57534e;}
.article-content a{color:var(--ca-primary);text-decoration:underline;text-underline-offset:2px;}
.article-content a:hover{color:var(--ca-primary-dark);text-decoration-thickness:2px;}
.article-content table{width:100%;border-collapse:collapse;margin:20px 0;}
.article-content table th,.article-content table td{border:1px solid var(--ca-border);padding:10px 14px;text-align:left;}
.article-content table th{background:var(--ca-bg);font-weight:700;}
.article-content pre{background:#0f172a;color:#e2e8f0;padding:16px 20px;border-radius:12px;overflow-x:auto;font-size:14px;line-height:1.7;}
.article-tags{margin-top:30px;padding-top:20px;border-top:1px solid var(--ca-border);display:flex;flex-wrap:wrap;gap:10px;align-items:center;}
.article-tags .tags-label{display:inline-flex;align-items:center;gap:6px;color:var(--ca-muted);font-size:13px;font-weight:600;margin-right:4px;}
.article-tags .tags-label i{color:var(--ca-primary);}
.tag-badge{background:var(--ca-bg);color:#475569;font-weight:500;padding:6px 14px;border-radius:20px;font-size:13px;transition:all .2s;}
.tag-badge:hover{background:#eff6ff;color:var(--ca-primary);}
.article-nav{display:flex;justify-content:space-between;gap:16px;margin-top:32px;padding-top:24px;border-top:1px solid var(--ca-border);}
.article-nav a{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border:1px solid var(--ca-border);border-radius:30px;color:#334155;font-size:14px;font-weight:500;transition:all .2s;background:var(--ca-surface);}
.article-nav a:hover{border-color:var(--ca-primary);color:var(--ca-primary);background:#eff6ff;transform:translateY(-2px);box-shadow:var(--ca-shadow);}
.sidebar-widget{background:var(--ca-surface);border:1px solid var(--ca-border);border-radius:var(--ca-radius);box-shadow:var(--ca-shadow);padding:24px;margin-bottom:24px;}
.widget-title{font-size:16px;font-weight:700;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--ca-border);display:flex;align-items:center;gap:8px;}
.widget-title i{color:var(--ca-primary);}
.widget-text{font-size:14px;color:var(--ca-muted);line-height:1.7;margin-bottom:16px;}
.widget-btn{display:inline-flex;align-items:center;gap:6px;background:var(--ca-primary);color:#fff;border:none;border-radius:8px;padding:9px 18px;font-size:14px;font-weight:600;transition:all .2s;}
.widget-btn:hover{background:var(--ca-primary-dark);color:#fff;transform:translateY(-1px);}
.widget-cat-list{list-style:none;padding:0;margin:0;}
.widget-cat-list li{margin-bottom:10px;}
.widget-cat-list li a{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--ca-bg);border-radius:10px;color:#334155;font-weight:500;font-size:14px;transition:all .2s;}
.widget-cat-list li a i{color:var(--ca-primary);width:18px;text-align:center;}
.widget-cat-list li a:hover{background:#eff6ff;color:var(--ca-primary);transform:translateX(3px);}
.related-section{padding:50px 0 20px;}
.section-header{margin-bottom:32px;}
.section-header .overline{font-size:13px;font-weight:700;color:var(--ca-accent);letter-spacing:.08em;text-transform:uppercase;margin-bottom:8px;display:block;}
.section-header h2{font-size:28px;font-weight:800;margin:0;letter-spacing:-.02em;color:var(--ca-text);}
.section-header p{color:var(--ca-muted);font-size:15px;margin-top:8px;margin-bottom:0;}
.related-card{background:var(--ca-surface);border:1px solid var(--ca-border);border-radius:var(--ca-radius);overflow:hidden;box-shadow:var(--ca-shadow);transition:transform .3s ease,box-shadow .3s ease;height:100%;display:flex;flex-direction:column;}
.related-card:hover{transform:translateY(-6px);box-shadow:var(--ca-shadow-lg);}
.related-card img{width:100%;height:160px;object-fit:cover;display:block;}
.related-card-body{padding:20px 22px;display:flex;flex-direction:column;flex:1;}
.related-card h3{font-size:17px;font-weight:700;margin-bottom:8px;line-height:1.4;color:var(--ca-text);}
.related-card p{font-size:14px;color:var(--ca-muted);margin-bottom:16px;line-height:1.6;flex:1;}
.related-btn{font-size:14px;font-weight:600;color:var(--ca-primary);display:inline-flex;align-items:center;gap:6px;border:none;background:none;padding:0;}
.related-btn:hover{color:var(--ca-primary-dark);gap:10px;}
.cta-section{padding:60px 0;}
.cta-card{background:linear-gradient(120deg,#1e3bd8,#2563eb);border-radius:24px;padding:52px 40px;text-align:center;color:#fff;position:relative;overflow:hidden;box-shadow:var(--ca-shadow-lg);}
.cta-card::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:.12;}
.cta-card h2{font-size:28px;font-weight:800;margin-bottom:12px;position:relative;}
.cta-card p{font-size:16px;opacity:.9;margin-bottom:26px;position:relative;max-width:600px;margin-left:auto;margin-right:auto;}
.cta-btn{display:inline-flex;align-items:center;gap:8px;background:var(--ca-accent);color:#111827;font-weight:700;padding:13px 34px;border-radius:30px;font-size:16px;transition:all .2s;position:relative;border:none;}
.cta-btn:hover{background:#fbbf24;color:#111827;transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,0,0,.2);}
.footer{background:#0f172a;color:#94a3b8;padding:56px 0 0;margin-top:auto;}
.footer h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:18px;}
.footer p{font-size:14px;line-height:1.7;margin-bottom:0;}
.footer-links{list-style:none;padding:0;margin:0;}
.footer-links li{margin-bottom:10px;}
.footer-links a{color:#94a3b8;font-size:14px;transition:color .2s;}
.footer-links a:hover{color:#fff;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding:18px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:#64748b;}
.not-found-page{background:var(--ca-surface);border:1px solid var(--ca-border);border-radius:var(--ca-radius);box-shadow:var(--ca-shadow);padding:64px 32px;text-align:center;}
.not-found-page i{font-size:48px;color:#dbe0e8;margin-bottom:16px;display:block;}
.not-found-page h2{font-size:24px;font-weight:800;margin-bottom:10px;color:var(--ca-text);}
.not-found-page p{color:var(--ca-muted);margin-bottom:24px;}
.not-found-page .btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--ca-primary);border:none;border-radius:10px;padding:11px 28px;font-weight:600;font-size:15px;transition:all .2s;}
.not-found-page .btn-primary:hover{background:var(--ca-primary-dark);transform:translateY(-2px);}
@media (max-width:991.98px){
  .sidebar{transform:translateX(-105%);box-shadow:none;width:280px;}
  .sidebar.show{transform:translateX(0);box-shadow:var(--ca-shadow-lg);}
  .main-content{margin-left:0;}
  .mobile-header{display:flex;}
  .page-banner{padding:48px 0 42px;}
}
@media (max-width:767.98px){
  .article-section{padding:32px 0 16px;}
  .article-main{padding:20px 18px 28px;}
  .article-title{font-size:24px;line-height:1.4;}
  .page-banner{padding:40px 0 34px;}
  .banner-title{font-size:26px;}
  .section-header h2{font-size:24px;}
  .related-section{padding:36px 0 16px;}
  .cta-section{padding:40px 0;}
  .cta-card{padding:36px 20px;border-radius:18px;}
  .cta-card h2{font-size:22px;}
  .sidebar-widget{padding:20px;}
}
@media (max-width:575.98px){
  .article-meta{gap:10px;font-size:13px;}
  .article-nav{flex-direction:column;align-items:stretch;}
  .article-nav a{justify-content:center;}
  .article-cover{aspect-ratio:16/10;}
  .article-content{font-size:15px;line-height:1.85;}
  .footer-bottom{flex-direction:column;justify-content:center;text-align:center;}
  .banner-title{font-size:22px;}
}

/* roulang page: category2 */
:root{--primary:#1a5cff;--primary-dark:#0e3fa8;--primary-light:#e8eefc;--accent:#f5a623;--bg:#f4f6fb;--white:#ffffff;--text:#1e293b;--muted:#64748b;--border:#e2e8f0;--radius:14px;--radius-lg:22px;--shadow-sm:0 2px 8px rgba(30,41,59,.06);--shadow-md:0 6px 20px rgba(30,41,59,.08);--shadow-lg:0 12px 36px rgba(30,41,59,.12);--transition:all .25s ease}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px}
a{text-decoration:none;color:inherit;transition:var(--transition)}
img{max-width:100%;height:auto;display:block}
button,input{font-family:inherit}
.container{max-width:1200px}
.app-shell{display:flex;min-height:100vh}
.sidebar{width:264px;flex-shrink:0;background:#0d1730;color:#c9d6f0;position:fixed;top:0;bottom:0;left:0;z-index:1040;display:flex;flex-direction:column;padding:24px 18px;overflow-y:auto;transition:var(--transition)}
.sidebar-logo{display:flex;align-items:center;gap:12px;padding:8px 10px 22px;border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:22px}
.sidebar-logo .logo-icon{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;color:#fff;flex-shrink:0}
.sidebar-logo .logo-text{font-size:17px;font-weight:700;color:#fff;line-height:1.3}
.sidebar-logo .logo-text small{display:block;font-size:11px;color:#7f9cc4;font-weight:400}
.nav-label{font-size:11px;text-transform:uppercase;letter-spacing:1px;color:#5e769e;margin:0 10px 10px}
.sidebar-nav a{display:flex;align-items:center;gap:12px;padding:11px 16px;border-radius:10px;color:#b5c7e4;font-size:14.5px;font-weight:500;margin-bottom:4px;transition:var(--transition)}
.sidebar-nav a i{width:20px;text-align:center;font-size:15px}
.sidebar-nav a:hover{background:rgba(255,255,255,.08);color:#fff;transform:translateX(3px)}
.sidebar-nav a.active{background:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(26,92,255,.35)}
.sidebar-footer{margin-top:auto;padding:16px 10px 8px;border-top:1px solid rgba(255,255,255,.08);font-size:12px;color:#5e769e}
.sidebar-footer .mini-stats span{display:block;margin-bottom:4px}
.main-content{flex:1;margin-left:264px;min-width:0;display:flex;flex-direction:column}
.mobile-topbar{display:none;position:sticky;top:0;z-index:1030;background:#0d1730;color:#fff;padding:12px 16px;align-items:center;justify-content:space-between}
.mobile-topbar .topbar-logo{font-weight:700;color:#fff;font-size:16px}
.mobile-topbar .menu-toggle{background:rgba(255,255,255,.12);border:none;color:#fff;width:40px;height:40px;border-radius:10px;font-size:17px;display:flex;align-items:center;justify-content:center;cursor:pointer}
.tutorial-banner{position:relative;background:linear-gradient(rgba(13,23,48,.74),rgba(13,23,48,.74)),url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;padding:74px 0 54px;color:#fff;text-align:center;border-bottom:4px solid var(--primary)}
.tutorial-banner .breadcrumb-line{font-size:13px;color:#8fa8cc;margin-bottom:14px}
.tutorial-banner h1{font-size:36px;font-weight:800;margin-bottom:12px;letter-spacing:.5px}
.tutorial-banner p{font-size:16px;color:#c3d3ec;max-width:640px;margin:0 auto}
.banner-tags{margin-top:22px;display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.banner-tags .tag-pill{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);color:#e4ecf8;padding:5px 16px;border-radius:30px;font-size:13px;backdrop-filter:blur(4px)}
.section-block{padding:60px 0}
.section-head{margin-bottom:32px}
.section-head .section-sub{color:var(--primary);font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:1.5px;margin-bottom:6px;display:block}
.section-head h2{font-size:28px;font-weight:700;margin:0 0 8px}
.section-head p{color:var(--muted);max-width:640px;margin-bottom:0}
.cat-tabs{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-bottom:24px}
.cat-tabs .cat-tab{padding:9px 22px;border-radius:30px;background:#fff;border:1px solid var(--border);font-size:14px;font-weight:500;color:var(--muted);box-shadow:var(--shadow-sm);transition:var(--transition);cursor:pointer}
.cat-tabs .cat-tab:hover,.cat-tabs .cat-tab.active{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(26,92,255,.25)}
.tutorial-card{background:#fff;border-radius:var(--radius-lg);border:1px solid var(--border);overflow:hidden;box-shadow:var(--shadow-sm);transition:var(--transition);height:100%}
.tutorial-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:#d5def0}
.tutorial-card .card-cover{position:relative;overflow:hidden;aspect-ratio:16/10}
.tutorial-card .card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.tutorial-card:hover .card-cover img{transform:scale(1.05)}
.tutorial-card .card-body{padding:22px}
.tutorial-card .card-badge{display:inline-block;background:var(--primary-light);color:var(--primary);font-size:12px;font-weight:600;padding:3px 12px;border-radius:20px;margin-bottom:10px}
.tutorial-card h3{font-size:16.5px;font-weight:700;margin-bottom:8px;line-height:1.45}
.tutorial-card h3 a{color:var(--text)}
.tutorial-card h3 a:hover{color:var(--primary)}
.tutorial-card .card-desc{color:var(--muted);font-size:13.5px;margin-bottom:14px}
.tutorial-card .card-meta{display:flex;gap:14px;font-size:12px;color:#94a3b8}
.path-wrapper{background:#0d1730;border-radius:var(--radius-lg);padding:40px;color:#dfe8f7;position:relative;overflow:hidden}
.path-wrapper:before{content:'';position:absolute;top:-80px;right:-80px;width:200px;height:200px;background:radial-gradient(circle,rgba(26,92,255,.35),transparent 70%);border-radius:50%}
.path-step{position:relative;padding:18px 0 18px 56px;border-left:2px solid rgba(255,255,255,.15);margin-left:18px}
.path-step:last-child{border-left-color:transparent}
.path-step .step-num{position:absolute;left:-20px;top:16px;width:38px;height:38px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;box-shadow:0 0 0 4px rgba(26,92,255,.25)}
.path-step h3{color:#fff;font-size:16px;font-weight:600;margin-bottom:4px}
.path-step p{color:#93a6c7;font-size:14px;margin:0}
.tips-grid .tip-item{background:#fff;border-radius:14px;padding:20px;border:1px solid var(--border);display:flex;gap:14px;height:100%;transition:var(--transition)}
.tip-item:hover{box-shadow:var(--shadow-md);border-color:#cbd8f0}
.tip-item .tip-icon{width:40px;height:40px;border-radius:10px;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.tip-item h4{font-size:15px;font-weight:600;margin-bottom:4px}
.tip-item p{color:var(--muted);font-size:13.5px;margin:0}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px 24px;margin-bottom:12px;transition:var(--transition)}
.faq-item:hover{border-color:#cbd8f0;box-shadow:var(--shadow-sm)}
.faq-item h4{font-size:15px;font-weight:600;margin-bottom:6px;display:flex;align-items:center;gap:10px}
.faq-item h4 i{color:var(--primary);font-size:14px}
.faq-item p{color:var(--muted);font-size:14px;margin:0;padding-left:24px}
.cta-section{background:linear-gradient(135deg,#0d1730,#1a2d55);border-radius:var(--radius-lg);padding:48px 36px;text-align:center;color:#fff;position:relative;overflow:hidden}
.cta-section:before{content:'';position:absolute;bottom:-60px;left:-60px;width:160px;height:160px;background:radial-gradient(circle,rgba(245,166,35,.3),transparent 70%);border-radius:50%}
.cta-section h2{font-size:26px;font-weight:700;margin-bottom:10px;position:relative;z-index:1}
.cta-section p{color:#bdcde8;margin-bottom:24px;font-size:15px;position:relative;z-index:1}
.btn-brand{background:var(--primary);color:#fff;border:none;padding:10px 28px;border-radius:30px;font-weight:600;font-size:14px;transition:var(--transition);display:inline-flex;align-items:center;gap:8px;text-decoration:none}
.btn-brand:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 8px 20px rgba(26,92,255,.3)}
.btn-outline-white{border:1px solid rgba(255,255,255,.5);color:#fff;background:transparent;padding:10px 28px;border-radius:30px;font-weight:500;font-size:14px;transition:var(--transition);text-decoration:none}
.btn-outline-white:hover{background:rgba(255,255,255,.12);color:#fff}
.footer{background:#0d1730;color:#b7c8e2;padding:56px 0 0}
.footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer p{font-size:14px;color:#8ea2c4}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin-bottom:8px}
.footer-links a{color:#b7c8e2;font-size:13.5px;text-decoration:none}
.footer-links a:hover{color:var(--accent);padding-left:4px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;margin-top:20px;display:flex;justify-content:space-between;align-items:center;font-size:13px;color:#6d83a6}
@media(max-width:1024px){.sidebar{width:230px}.main-content{margin-left:230px}.tutorial-banner h1{font-size:30px}}
@media(max-width:768px){.sidebar{transform:translateX(-100%);width:270px}.sidebar.open{transform:translateX(0);box-shadow:0 0 0 100vw rgba(0,0,0,.5)}.main-content{margin-left:0}.mobile-topbar{display:flex}.tutorial-banner{padding:46px 0 34px}.tutorial-banner h1{font-size:24px}.section-block{padding:40px 0}.path-wrapper{padding:28px 20px}.cta-section{padding:36px 24px}.footer-bottom{flex-direction:column;gap:6px;text-align:center}}
@media(max-width:520px){.tutorial-banner h1{font-size:21px}.section-head h2{font-size:22px}.cat-tabs .cat-tab{padding:7px 16px;font-size:13px}.path-step{padding-left:46px}.path-step .step-num{left:-18px;width:34px;height:34px}}

/* roulang page: category3 */
:root {
  --primary-900: #0f1f3a;
  --primary-800: #14294a;
  --primary-700: #1a2b4a;
  --primary-600: #223a63;
  --accent: #e8a33d;
  --accent-hover: #d4912d;
  --accent-soft: #fdf2e0;
  --bg: #f4f6fb;
  --surface: #ffffff;
  --text: #1e2a3a;
  --muted: #6b7a8f;
  --border: #e6eaf2;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-xs: 0 1px 3px rgba(15,31,58,.05);
  --shadow-sm: 0 4px 14px rgba(15,31,58,.06);
  --shadow-md: 0 10px 36px rgba(15,31,58,.08);
  --shadow-lg: 0 20px 60px rgba(15,31,58,.12);
  --sidebar-w: 264px;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--primary-700);
  text-decoration: none;
  transition: color .2s ease;
}
a:hover {
  color: var(--accent-hover);
}
img {
  max-width: 100%;
}
input, button, textarea {
  font-family: inherit;
}
.container {
  max-width: 1200px;
  padding-left: 20px;
  padding-right: 20px;
}

/* ===== 左侧导航 ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: linear-gradient(172deg, var(--primary-800) 0%, var(--primary-900) 100%);
  padding: 0;
  z-index: 1040;
  border-right: 1px solid rgba(255,255,255,.06);
  overflow-y: auto;
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 28px 24px 22px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.brand-mark {
  width: 42px;
  height: 42px;
  background: var(--accent);
  color: var(--primary-900);
  font-weight: 800;
  font-size: 18px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  letter-spacing: -1px;
  box-shadow: 0 6px 16px rgba(232,163,61,.35);
}
.brand-name {
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .5px;
  line-height: 1.2;
}
.brand-name small {
  display: block;
  font-size: 11px;
  color: rgba(255,255,255,.45);
  font-weight: 400;
  letter-spacing: 1px;
  margin-top: 2px;
}
.sidebar-nav {
  padding: 20px 16px;
  flex-grow: 1;
}
.nav-label {
  color: rgba(255,255,255,.42);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
  padding-left: 10px;
  font-weight: 600;
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(255,255,255,.74);
  padding: 12px 14px;
  border-radius: 12px;
  margin-bottom: 6px;
  font-size: 14.5px;
  font-weight: 500;
  transition: all .22s ease;
  border: 1px solid transparent;
}
.sidebar-nav a i {
  width: 20px;
  text-align: center;
  color: var(--accent);
  font-size: 15px;
  transition: color .2s ease;
}
.sidebar-nav a:hover {
  background: rgba(255,255,255,.08);
  color: #fff;
  transform: translateX(3px);
}
.sidebar-nav a.active {
  background: var(--accent);
  color: var(--primary-900);
  font-weight: 700;
  border-color: rgba(255,255,255,.12);
  box-shadow: 0 8px 22px rgba(232,163,61,.35);
}
.sidebar-nav a.active i {
  color: var(--primary-900);
}
.sidebar-footer {
  padding: 18px 22px;
  border-top: 1px solid rgba(255,255,255,.08);
}
.side-info {
  display: flex;
  align-items: center;
  gap: 12px;
}
.side-info i {
  color: var(--accent);
  font-size: 20px;
}
.side-info strong {
  display: block;
  color: rgba(255,255,255,.9);
  font-size: 14px;
  font-weight: 600;
}
.side-info span {
  font-size: 12px;
  color: rgba(255,255,255,.5);
}

/* ===== 移动端顶部栏 ===== */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 1030;
  background: var(--primary-800);
  padding: 12px 16px;
  align-items: center;
  gap: 12px;
  box-shadow: 0 4px 20px rgba(15,31,58,.3);
}
.mobile-header .btn-menu {
  background: rgba(255,255,255,.12);
  border: none;
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}
.mobile-header .btn-menu:hover {
  background: var(--accent);
  color: var(--primary-900);
}
.mobile-brand {
  color: #fff;
  font-size: 18px;
  font-weight: 700;
}
.sidebar-backdrop {
  display: none;
}

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

/* ===== 页面 Hero ===== */
.page-hero {
  position: relative;
  padding: 90px 0 74px;
  background: linear-gradient(100deg, rgba(15,31,58,.92) 0%, rgba(20,41,74,.82) 55%, rgba(34,58,99,.68) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: #fff;
}
.page-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(180deg, rgba(244,246,251,0), rgba(244,246,251,1));
  pointer-events: none;
}
.page-hero .container {
  position: relative;
  z-index: 2;
}
.breadcrumb-custom {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.55);
  margin-bottom: 22px;
}
.breadcrumb-custom a {
  color: rgba(255,255,255,.75);
}
.breadcrumb-custom a:hover {
  color: var(--accent);
}
.breadcrumb-custom .sep {
  color: rgba(255,255,255,.35);
}
.breadcrumb-custom .current {
  color: var(--accent);
}
.page-hero h1 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 14px;
  letter-spacing: .5px;
}
.page-hero h1 span {
  color: var(--accent);
}
.page-hero .hero-desc {
  font-size: 16.5px;
  color: rgba(255,255,255,.78);
  max-width: 560px;
  margin-bottom: 30px;
  line-height: 1.75;
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}
.hero-tags .tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.18);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 13px;
  color: rgba(255,255,255,.85);
  backdrop-filter: blur(6px);
}
.hero-tags .tag-pill i {
  color: var(--accent);
  font-size: 12px;
}
.hero-search {
  max-width: 580px;
  background: #fff;
  border-radius: 14px;
  display: flex;
  align-items: center;
  padding: 6px 6px 6px 18px;
  box-shadow: 0 12px 40px rgba(15,31,58,.25);
}
.hero-search .search-icon {
  color: var(--muted);
  font-size: 15px;
}
.hero-search input {
  flex: 1;
  border: none;
  outline: none;
  padding: 12px 14px;
  font-size: 14px;
  color: var(--text);
  background: transparent;
}
.hero-search input::placeholder {
  color: #9aa7b8;
}
.hero-search .btn-accent {
  background: var(--accent);
  border: none;
  color: var(--primary-900);
  font-weight: 700;
  font-size: 14px;
  padding: 11px 28px;
  border-radius: 10px;
  transition: all .25s ease;
  white-space: nowrap;
}
.hero-search .btn-accent:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-2px);
}

/* ===== 通用板块 ===== */
.section {
  padding: 78px 0;
}
.section-head {
  text-align: center;
  max-width: 660px;
  margin: 0 auto 48px;
}
.eyebrow {
  display: inline-block;
  padding: 6px 16px;
  background: var(--accent-soft);
  color: var(--accent-hover);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 12px;
  letter-spacing: .5px;
}
.section-head p {
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.7;
}

/* ===== 分类卡片 ===== */
.cat-card {
  display: block;
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
  transition: all .3s ease;
  height: 100%;
}
.cat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(232,163,61,.5);
}
.cat-card-media {
  height: 150px;
  overflow: hidden;
  position: relative;
}
.cat-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.cat-card:hover .cat-card-media img {
  transform: scale(1.06);
}
.cat-card-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(15,31,58,.3));
}
.cat-card-body {
  padding: 22px 22px 24px;
}
.cat-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-soft);
  color: var(--accent-hover);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  margin-bottom: 14px;
  transition: all .3s ease;
}
.cat-card:hover .cat-icon {
  background: var(--accent);
  color: var(--primary-900);
}
.cat-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.cat-card p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 14px;
}
.cat-link {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--primary-700);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s ease;
}
.cat-card:hover .cat-link {
  gap: 10px;
  color: var(--accent-hover);
}

/* ===== FAQ 手风琴 ===== */
.faq-section {
  background: var(--surface);
}
.faq-accordion .accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 14px;
  box-shadow: var(--shadow-xs);
  background: var(--surface);
}
.faq-accordion .accordion-button {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  padding: 18px 20px;
  background: var(--surface);
  border: none;
  box-shadow: none;
  transition: all .25s ease;
}
.faq-accordion .accordion-button:hover {
  background: var(--accent-soft);
}
.faq-accordion .accordion-button:not(.collapsed) {
  background: var(--primary-700);
  color: #fff;
  box-shadow: none;
}
.faq-accordion .accordion-button:focus {
  box-shadow: 0 0 0 3px rgba(232,163,61,.35);
  z-index: 1;
}
.faq-accordion .accordion-button::after {
  background: none;
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  color: var(--accent);
  transition: transform .3s ease;
}
.faq-accordion .accordion-button:not(.collapsed)::after {
  background: none;
  color: var(--accent);
  transform: rotate(180deg);
}
.faq-accordion .accordion-body {
  padding: 20px 22px;
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.8;
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.accordion-button:not(.collapsed) + .accordion-body {
  border-top-color: rgba(255,255,255,.08);
}

/* ===== 流程步骤 ===== */
.process-section {
  background: var(--bg);
}
.process-step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 38px 30px 32px;
  position: relative;
  height: 100%;
  box-shadow: var(--shadow-xs);
  transition: all .3s ease;
  overflow: hidden;
}
.process-step:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.step-num {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 48px;
  font-weight: 800;
  color: rgba(15,31,58,.06);
  line-height: 1;
}
.process-step .step-icon {
  width: 54px;
  height: 54px;
  background: var(--primary-700);
  color: var(--accent);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
  box-shadow: 0 6px 16px rgba(26,43,74,.25);
}
.process-step h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.process-step p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ===== 数据统计 ===== */
.stat-section {
  padding: 70px 0;
  background: linear-gradient(120deg, var(--primary-800), var(--primary-600)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  position: relative;
}
.stat-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(15,31,58,.72);
}
.stat-section .container {
  position: relative;
  z-index: 2;
}
.stat-box {
  text-align: center;
  padding: 22px 12px;
}
.stat-num {
  font-size: 44px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 14px;
  color: rgba(255,255,255,.72);
  letter-spacing: 1px;
}
.stat-box i {
  font-size: 20px;
  color: rgba(255,255,255,.4);
  display: block;
  margin-bottom: 12px;
}

/* ===== 最新问答卡片 ===== */
.qa-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
  height: 100%;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xs);
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}
.qa-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}
.qa-card:hover::before {
  transform: scaleX(1);
}
.qa-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: rgba(232,163,61,.4);
}
.qa-card .card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--accent-soft);
  color: var(--accent-hover);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
}
.qa-card .card-date {
  font-size: 12px;
  color: var(--muted);
}
.qa-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  line-height: 1.5;
}
.qa-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 18px;
  flex-grow: 1;
}
.qa-card .qa-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-700);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s ease;
}
.qa-card .qa-link:hover {
  gap: 10px;
  color: var(--accent-hover);
}
.qa-card .qa-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--accent-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 16px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 78px 0;
}
.cta-box {
  background: linear-gradient(135deg, var(--primary-800), var(--primary-600));
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.cta-box::before {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(232,163,61,.18);
  top: -80px;
  right: -60px;
}
.cta-box::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
  bottom: -60px;
  left: -40px;
}
.cta-box h2 {
  position: relative;
  z-index: 2;
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 14px;
}
.cta-box p {
  position: relative;
  z-index: 2;
  font-size: 16px;
  color: rgba(255,255,255,.75);
  margin-bottom: 30px;
}
.cta-actions {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}
.btn-light-custom {
  background: #fff;
  color: var(--primary-800);
  border: none;
  font-weight: 600;
  padding: 13px 32px;
  border-radius: 12px;
  transition: all .25s ease;
}
.btn-light-custom:hover {
  background: var(--accent);
  color: var(--primary-900);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(232,163,61,.4);
}
.btn-outline-light-custom {
  background: transparent;
  border: 1.5px solid rgba(255,255,255,.6);
  color: #fff;
  font-weight: 600;
  padding: 13px 32px;
  border-radius: 12px;
  transition: all .25s ease;
}
.btn-outline-light-custom:hover {
  background: rgba(255,255,255,.12);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--primary-900);
  color: rgba(255,255,255,.6);
  padding: 58px 0 24px;
  margin-top: auto;
}
.footer h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: .5px;
}
.footer h4 .text-warning {
  color: var(--accent) !important;
}
.footer .brand-desc {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255,255,255,.55);
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: rgba(255,255,255,.62);
  font-size: 14px;
  transition: all .2s ease;
}
.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  margin-top: 44px;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: rgba(255,255,255,.4);
}
.footer-bottom a {
  color: rgba(255,255,255,.4);
}

/* ===== 响应式 ===== */
@media (max-width: 991.98px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform .32s ease;
    box-shadow: 6px 0 30px rgba(15,31,58,.35);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .mobile-header {
    display: flex;
  }
  .main-wrapper {
    margin-left: 0;
  }
  .sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15,31,58,.5);
    z-index: 1035;
    backdrop-filter: blur(2px);
  }
  .sidebar-backdrop.show {
    display: block;
  }
  .page-hero {
    padding: 64px 0 56px;
  }
  .page-hero h1 {
    font-size: 32px;
  }
  .section {
    padding: 60px 0;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .cta-box {
    padding: 48px 30px;
  }
  .cta-box h2 {
    font-size: 26px;
  }
}
@media (max-width: 767.98px) {
  .page-hero {
    padding: 48px 0 42px;
  }
  .page-hero h1 {
    font-size: 27px;
  }
  .hero-desc {
    font-size: 15px !important;
  }
  .hero-search {
    flex-wrap: wrap;
    padding: 12px;
    gap: 8px;
  }
  .hero-search input {
    flex: 1 1 100%;
    padding: 10px 8px;
    border-bottom: 1px solid var(--border);
  }
  .hero-search .btn-accent {
    width: 100%;
  }
  .section-head h2 {
    font-size: 24px;
  }
  .stat-num {
    font-size: 34px;
  }
  .process-step {
    padding: 28px 22px;
  }
  .qa-card {
    padding: 24px 20px;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}
@media (max-width: 520px) {
  .section {
    padding: 46px 0;
  }
  .section-head {
    margin-bottom: 34px;
  }
  .page-hero h1 {
    font-size: 24px;
  }
  .hero-tags .tag-pill {
    font-size: 12px;
    padding: 5px 12px;
  }
  .cat-card-media {
    height: 130px;
  }
  .stat-section {
    padding: 50px 0;
  }
  .cta-box {
    padding: 38px 20px;
    border-radius: 16px;
  }
  .cta-box h2 {
    font-size: 22px;
  }
}