/* roulang page: index */
:root {
  --primary: #0b1f3a;
  --primary-light: #163a63;
  --primary-lighter: #1e4e85;
  --accent: #e8a33d;
  --accent-dark: #d18a24;
  --accent-light: #fef3e0;
  --bg: #f5f7fb;
  --bg-white: #ffffff;
  --bg-dark: #0a1628;
  --text: #1c2635;
  --text-light: #ffffff;
  --muted: #637187;
  --border: #e3e9f2;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 10px rgba(11, 31, 58, 0.06);
  --shadow-md: 0 8px 28px rgba(11, 31, 58, 0.09);
  --shadow-lg: 0 18px 44px rgba(11, 31, 58, 0.13);
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition: all 0.25s ease;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
a:hover {
  color: var(--accent);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button,
input,
select,
textarea {
  font-family: inherit;
}
.container {
  max-width: 1200px;
  padding-left: 20px;
  padding-right: 20px;
}
.btn {
  border-radius: 10px;
  padding: 0.6rem 1.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  border: 2px solid transparent;
}
.btn-lg {
  padding: 0.8rem 1.9rem;
  font-size: 1rem;
  border-radius: 12px;
}
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn-outline-light-custom {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.8);
  color: #fff;
}
.btn-outline-light-custom:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}
.btn-ghost {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}
.btn-ghost:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn:focus,
.btn:focus-visible {
  outline: 3px solid rgba(232, 163, 61, 0.35);
  box-shadow: none;
}
.badge-custom {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.section-padding {
  padding: 5.5rem 0;
}
.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}
.section-subtitle {
  font-size: 1rem;
  color: var(--muted);
  max-width: 640px;
  margin: 0 auto 2.8rem;
}
.section-header {
  text-align: center;
  margin-bottom: 2.8rem;
}
.section-header .badge-custom {
  background: var(--accent-light);
  color: var(--accent-dark);
  margin-bottom: 0.8rem;
}

/* ===== Header ===== */
.site-header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1050;
  box-shadow: var(--shadow-sm);
}
.header-top {
  padding: 0.9rem 0;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
}
.brand-logo:hover {
  color: var(--primary);
}
.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary-lighter));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1rem;
  box-shadow: 0 4px 12px rgba(11, 31, 58, 0.2);
}
.header-search {
  position: relative;
  flex: 0 1 360px;
}
.header-search input {
  width: 100%;
  border: 1.5px solid var(--border);
  border-radius: 100px;
  padding: 0.5rem 2.6rem 0.5rem 1.1rem;
  font-size: 0.9rem;
  background: var(--bg);
  color: var(--text);
  transition: var(--transition);
}
.header-search input:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(232, 163, 61, 0.12);
}
.header-search button {
  position: absolute;
  top: 50%;
  right: 8px;
  transform: translateY(-50%);
  background: var(--accent);
  border: none;
  width: 34px;
  height: 34px;
  border-radius: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition);
}
.header-search button:hover {
  background: var(--accent-dark);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.btn-header {
  background: var(--accent-light);
  color: var(--accent-dark);
  border-radius: 100px;
  padding: 0.45rem 1.1rem;
  font-size: 0.88rem;
  font-weight: 600;
  transition: var(--transition);
  border: 1px solid transparent;
}
.btn-header:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.navbar-toggler {
  background: transparent;
  border: 1.5px solid var(--border);
  border-radius: 9px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
}
.navbar-toggler:hover {
  background: var(--accent-light);
  border-color: var(--accent);
}
.channel-nav {
  background: var(--primary);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  overflow-x: auto;
}
.channel-nav-wrap {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.35rem 0;
  white-space: nowrap;
}
.channel-nav a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 0.55rem 1.15rem;
  border-radius: 100px;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.channel-nav a i {
  font-size: 0.78rem;
  opacity: 0.7;
}
.channel-nav a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}
.channel-nav a.active {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}
.mobile-nav-collapse {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  padding: 0.6rem 0;
}
.mobile-nav-collapse a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  color: var(--primary);
  font-weight: 500;
  border-radius: 10px;
  transition: var(--transition);
}
.mobile-nav-collapse a:hover {
  background: var(--accent-light);
  color: var(--accent-dark);
}
.mobile-nav-collapse a.active {
  background: var(--accent);
  color: #fff;
}

/* ===== Hero ===== */
.hero-section {
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  position: relative;
  padding: 6.5rem 0;
  color: #fff;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(11, 31, 58, 0.92) 0%, rgba(11, 31, 58, 0.65) 60%, rgba(11, 31, 58, 0.35) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
  border-radius: 100px;
  padding: 0.4rem 1.1rem;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1.4rem;
}
.hero-badge i {
  color: var(--accent);
}
.hero-section h1 {
  font-size: 3.1rem;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 1rem;
  line-height: 1.2;
}
.hero-lead {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 560px;
  margin-bottom: 1.8rem;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.8rem;
  margin-top: 2.6rem;
  padding-top: 1.6rem;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}
.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.8);
}
.hero-meta-item i {
  color: var(--accent);
}

/* ===== Features ===== */
.features-section {
  background: var(--bg-white);
}
.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.8rem;
  height: 100%;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1.2rem;
}
.feature-icon.color-blue {
  background: #e8f0fe;
  color: #1e4e85;
}
.feature-icon.color-orange {
  background: var(--accent-light);
  color: var(--accent-dark);
}
.feature-icon.color-green {
  background: #e4f5ec;
  color: #1e8c68;
}
.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.6rem;
}
.feature-card p {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0;
  line-height: 1.7;
}
.feature-card .feature-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-dark);
  margin-top: 1rem;
  transition: var(--transition);
}
.feature-card .feature-link:hover {
  gap: 0.6rem;
  color: var(--primary);
}

/* ===== Categories ===== */
.categories-section {
  background: var(--bg);
}
.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-white);
  border: 1px solid var(--border);
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.category-card-img {
  position: relative;
  height: 190px;
  overflow: hidden;
}
.category-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.category-card:hover .category-card-img img {
  transform: scale(1.06);
}
.category-card-img .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(11, 31, 58, 0.72) 100%);
}
.category-card-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 100px;
  padding: 0.25rem 0.8rem;
}
.category-card-body {
  padding: 1.5rem 1.4rem 1.7rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.category-card-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}
.category-card-body p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 1rem;
}
.category-card-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent-dark);
  transition: var(--transition);
}
.category-card-btn:hover {
  gap: 0.7rem;
  color: var(--primary);
}

/* ===== News Section ===== */
.news-section {
  background: var(--bg-white);
}
.news-tabs .nav-pills .nav-link {
  border-radius: 100px;
  background: #f1f4f9;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 1.2rem;
  margin-right: 0.5rem;
  border: 1px solid transparent;
  transition: var(--transition);
}
.news-tabs .nav-pills .nav-link.active {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.news-list-item {
  display: flex;
  align-items: flex-start;
  gap: 1.1rem;
  padding: 1.3rem 0;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.news-list-item:first-child {
  padding-top: 0;
}
.news-list-item:hover {
  padding-left: 0.5rem;
  border-bottom-color: var(--accent);
}
.news-badge {
  flex-shrink: 0;
  background: var(--accent-light);
  color: var(--accent-dark);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 6px;
  padding: 0.2rem 0.6rem;
  margin-top: 0.3rem;
}
.news-content h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--text);
  line-height: 1.5;
}
.news-content h4 a:hover {
  color: var(--accent-dark);
}
.news-content p {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 0.3rem;
  line-height: 1.6;
}
.news-date {
  font-size: 0.78rem;
  color: #a4b0be;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.news-date i {
  font-size: 0.72rem;
}
.news-sidebar {
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.6rem;
  border: 1px solid var(--border);
  height: 100%;
}
.news-sidebar h5 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1rem;
}
.news-sidebar-list {
  list-style: none;
}
.news-sidebar-list li {
  padding: 0.55rem 0;
  border-bottom: 1px dashed var(--border);
  display: flex;
  gap: 0.5rem;
  font-size: 0.88rem;
}
.news-sidebar-list li:last-child {
  border-bottom: none;
}
.news-sidebar-list li i {
  color: var(--accent);
  font-size: 0.75rem;
  margin-top: 0.3rem;
}
.news-sidebar-list li a:hover {
  color: var(--accent-dark);
}
.empty-news {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ===== Stats Section ===== */
.stats-section {
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  position: relative;
  padding: 5rem 0;
  color: #fff;
}
.stats-section .stats-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 22, 40, 0.86);
}
.stats-section .container {
  position: relative;
  z-index: 2;
}
.stat-item {
  text-align: center;
  padding: 1.5rem 1rem;
}
.stat-item .stat-num {
  font-size: 2.6rem;
  font-weight: 800;
  display: block;
  color: var(--accent);
  line-height: 1.2;
}
.stat-item .stat-label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.75);
  margin-top: 0.3rem;
}
.stat-item .stat-icon {
  font-size: 1.5rem;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 0.6rem;
}

/* ===== Process ===== */
.process-section {
  background: var(--bg-white);
}
.process-step {
  position: relative;
  text-align: center;
  padding: 1.8rem 1.2rem;
  border-radius: var(--radius-lg);
  background: var(--bg);
  border: 1px solid var(--border);
  height: 100%;
  transition: var(--transition);
}
.process-step:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  background: var(--bg-white);
  border-color: var(--accent);
}
.process-num {
  width: 44px;
  height: 44px;
  margin: 0 auto 1rem;
  border-radius: 100px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px rgba(232, 163, 61, 0.35);
}
.process-step h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}
.process-step p {
  font-size: 0.88rem;
  color: var(--muted);
  margin: 0;
  line-height: 1.7;
}
.process-arrow {
  position: absolute;
  top: 50%;
  right: -1rem;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 1.1rem;
  z-index: 2;
  display: none;
}
@media (min-width: 992px) {
  .process-arrow {
    display: block;
  }
}

/* ===== Feature Detail ===== */
.detail-section {
  background: var(--bg);
}
.detail-block {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  margin-bottom: 2.5rem;
}
.detail-block:last-child {
  margin-bottom: 0;
}
.detail-img {
  height: 100%;
  min-height: 320px;
}
.detail-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.detail-content {
  padding: 3rem 2.5rem;
}
.detail-content .badge-custom {
  background: var(--accent-light);
  color: var(--accent-dark);
  margin-bottom: 0.8rem;
}
.detail-content h3 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1rem;
}
.detail-content p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 1.2rem;
}
.detail-content ul {
  list-style: none;
  padding: 0;
}
.detail-content ul li {
  padding: 0.35rem 0;
  font-size: 0.9rem;
  color: var(--text);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}
.detail-content ul li i {
  color: var(--accent);
  font-size: 0.8rem;
  margin-top: 0.35rem;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-white);
}
.faq-accordion .accordion-item {
  border: 1px solid var(--border) !important;
  border-radius: var(--radius) !important;
  margin-bottom: 0.9rem;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.faq-accordion .accordion-button {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--bg-white);
  padding: 1.1rem 1.4rem;
  box-shadow: none;
}
.faq-accordion .accordion-button:not(.collapsed) {
  color: var(--accent-dark);
  background: var(--accent-light);
}
.faq-accordion .accordion-button:focus {
  box-shadow: none;
  border-color: transparent;
}
.faq-accordion .accordion-body {
  background: var(--bg-white);
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.8;
  border-top: 1px solid var(--border);
  padding: 1.1rem 1.4rem;
}

/* ===== CTA ===== */
.cta-section {
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  position: relative;
  padding: 5rem 0;
  color: #fff;
}
.cta-overlay {
  position: absolute;
  inset: 0;
  background: rgba(11, 31, 58, 0.82);
}
.cta-section .container {
  position: relative;
  z-index: 2;
  text-align: center;
}
.cta-section h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.8rem;
}
.cta-section p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 560px;
  margin: 0 auto 1.8rem;
}
.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.8rem;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-dark);
  color: #9fb0c3;
  padding: 3.5rem 0 0;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.8rem;
}
.footer-brand .brand-icon {
  background: rgba(255, 255, 255, 0.1);
  color: var(--accent);
}
.footer-about {
  font-size: 0.88rem;
  line-height: 1.8;
  margin-bottom: 1.2rem;
}
.footer-title {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 1rem;
  position: relative;
  padding-bottom: 0.6rem;
}
.footer-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 3px;
  border-radius: 3px;
  background: var(--accent);
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 0.5rem;
}
.footer-links li a {
  color: #9fb0c3;
  font-size: 0.9rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.footer-links li a i {
  font-size: 0.7rem;
  color: var(--accent);
}
.footer-links li a:hover {
  color: #fff;
  padding-left: 3px;
}
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  margin-bottom: 0.7rem;
  font-size: 0.88rem;
}
.footer-contact li i {
  color: var(--accent);
  margin-top: 0.2rem;
  font-size: 0.8rem;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 1.3rem 0;
  margin-top: 2rem;
  text-align: center;
  font-size: 0.82rem;
  color: #6e819a;
}
.footer-bottom a {
  color: var(--accent);
}
.footer-bottom a:hover {
  text-decoration: underline;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-section {
    padding: 4.5rem 0;
  }
  .hero-section h1 {
    font-size: 2.6rem;
  }
  .detail-content {
    padding: 2rem;
  }
  .stats-section {
    background-attachment: scroll;
  }
}
@media (max-width: 768px) {
  .section-padding {
    padding: 3.5rem 0;
  }
  .section-title {
    font-size: 1.6rem;
  }
  .hero-section h1 {
    font-size: 2rem;
  }
  .hero-lead {
    font-size: 0.98rem;
  }
  .hero-meta {
    gap: 1rem;
    flex-direction: column;
    align-items: flex-start;
  }
  .detail-block {
    margin-bottom: 1.8rem;
  }
  .detail-content {
    padding: 1.8rem 1.4rem;
  }
  .detail-content h3 {
    font-size: 1.3rem;
  }
  .stat-item .stat-num {
    font-size: 2rem;
  }
  .process-step {
    margin-bottom: 1.2rem;
  }
  .footer-bottom {
    padding: 1rem 0;
  }
  .news-sidebar {
    margin-top: 1.5rem;
  }
  .channel-nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .channel-nav-wrap {
    display: flex;
    min-width: max-content;
  }
}
@media (max-width: 520px) {
  .header-search {
    display: none !important;
  }
  .btn-header {
    display: none !important;
  }
  .brand-logo {
    font-size: 1.1rem;
  }
  .brand-icon {
    width: 34px;
    height: 34px;
    font-size: 0.85rem;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .section-title {
    font-size: 1.4rem;
  }
  .section-header .badge-custom {
    font-size: 0.72rem;
  }
  .detail-img {
    min-height: 220px;
  }
  .footer-title {
    margin-bottom: 0.7rem;
  }
}

/* roulang page: category1 */
:root{
  --primary:#1e3a8a;
  --primary-2:#2b4aad;
  --primary-dark:#142b66;
  --primary-light:#e8edf7;
  --accent:#f59e0b;
  --accent-dark:#d97706;
  --accent-light:#fef3c7;
  --ink:#1e293b;
  --weak:#64748b;
  --line:#e2e8f0;
  --bg:#f5f7fa;
  --card:#ffffff;
  --navy:#0f172a;
  --r-sm:8px;
  --r:14px;
  --r-lg:22px;
  --sh-sm:0 2px 10px rgba(15,23,42,.05);
  --sh:0 12px 28px rgba(15,23,42,.08);
  --sh-lg:0 22px 48px rgba(15,23,42,.14);
  --space:78px;
  --transition:.25s ease;
}
*{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;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit;transition:color var(--transition)}
a:hover{color:var(--primary)}
img{max-width:100%;display:block}
button,input{font-family:inherit}
.container{max-width:1200px}
.section{padding:var(--space) 0}
.section-alt{background:var(--card)}

/* 标题体系 */
.sec-head{max-width:700px;margin-bottom:44px}
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--primary-light);color:var(--primary);
  font-size:13px;font-weight:700;letter-spacing:.5px;
  padding:6px 16px;border-radius:50rem;
  margin-bottom:14px;
}
.sec-title{font-size:30px;font-weight:800;line-height:1.3;color:var(--ink);letter-spacing:-.5px}
.sec-sub{color:var(--weak);font-size:15px;margin-top:12px}
.sec-title .hl{color:var(--accent)}

/* 按钮 */
.btn{border-radius:10px;font-weight:600;transition:all var(--transition);display:inline-flex;align-items:center;gap:8px;border:0}
.btn-brand{background:var(--primary);color:#fff;padding:11px 24px}
.btn-brand:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(30,58,138,.28)}
.btn-accent{background:var(--accent);color:#fff;padding:10px 22px}
.btn-accent:hover{background:var(--accent-dark);color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(245,158,11,.32)}
.btn-light{background:#fff;color:var(--primary);padding:11px 24px}
.btn-light:hover{background:var(--primary-light);color:var(--primary);transform:translateY(-2px);box-shadow:0 10px 22px rgba(255,255,255,.22)}
.btn-outline-light{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.55);padding:10px 22px}
.btn-outline-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}

/* 顶部栏 */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:var(--card);
  border-bottom:1px solid var(--line);
  box-shadow:0 4px 18px rgba(15,23,42,.05);
}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:74px;gap:20px}
.brand-logo{display:inline-flex;align-items:center;gap:12px;flex-shrink:0}
.brand-icon{
  width:42px;height:42px;border-radius:12px;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  color:#fff;font-size:18px;
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 6px 14px rgba(30,58,138,.3);
}
.brand-text{font-size:21px;font-weight:800;color:var(--ink);letter-spacing:-.3px}
.topbar-actions{display:flex;align-items:center;gap:14px}
.header-search{position:relative}
.header-search form{
  background:#f1f5f9;border:1px solid transparent;
  border-radius:50rem;padding:0 16px;height:42px;
  display:flex;align-items:center;gap:8px;width:250px;
  transition:all var(--transition);
}
.header-search form:focus-within{background:#fff;border-color:var(--primary);box-shadow:0 0 0 4px rgba(30,58,138,.12)}
.header-search i{color:var(--weak);font-size:14px}
.header-search input{border:0;background:transparent;outline:none;font-size:14px;color:var(--ink);width:100%}
.mobile-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:var(--card);color:var(--ink);font-size:17px;
  transition:all var(--transition);
}
.mobile-toggle:hover{border-color:var(--primary);color:var(--primary)}

/* 频道导航 */
.channel-nav{
  background:#fbfcfe;
  border-top:1px solid var(--line);
}
.channel-nav-wrap{
  display:flex;align-items:center;gap:10px;
  overflow-x:auto;padding:14px 0;white-space:nowrap;
  scrollbar-width:none;
}
.channel-nav-wrap::-webkit-scrollbar{display:none}
.channel-nav-wrap a{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 20px;border-radius:50rem;
  font-size:14px;font-weight:600;color:var(--weak);
  background:transparent;
  transition:all var(--transition);
  flex-shrink:0;
}
.channel-nav-wrap a i{font-size:13px}
.channel-nav-wrap a:hover{background:var(--primary-light);color:var(--primary)}
.channel-nav-wrap a.active{
  background:var(--primary);color:#fff;
  box-shadow:0 6px 16px rgba(30,58,138,.3);
}

/* 移动端菜单 */
.mobile-menu{
  display:none;background:var(--card);
  border-top:1px solid var(--line);box-shadow:0 14px 28px rgba(15,23,42,.1);
}
.mobile-menu.open{display:block}
.mobile-menu .container{padding:18px 16px 22px}
.mobile-menu a{
  display:flex;align-items:center;gap:10px;
  padding:13px 14px;border-radius:10px;
  font-weight:600;font-size:15px;color:var(--ink);
  margin-bottom:6px;transition:all var(--transition);
}
.mobile-menu a i{width:20px;color:var(--primary)}
.mobile-menu a:hover{background:var(--bg)}
.mobile-menu a.active{background:var(--primary-light);color:var(--primary)}
.mobile-search form{
  display:flex;align-items:center;gap:8px;
  background:#f1f5f9;border-radius:10px;padding:0 14px;height:44px;
  border:1px solid transparent;
}
.mobile-search form:focus-within{background:#fff;border-color:var(--primary)}
.mobile-search i{color:var(--weak);font-size:14px}
.mobile-search input{border:0;background:transparent;outline:none;flex:1;font-size:14px}

/* 分类页 Hero */
.cat-hero{
  position:relative;color:#fff;
  background:linear-gradient(120deg,rgba(15,23,42,.94),rgba(30,58,138,.86)),url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding:92px 0 84px;overflow:hidden;
}
.cat-hero::after{
  content:'';position:absolute;right:-120px;top:-120px;
  width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(245,158,11,.28),transparent 65%);
  pointer-events:none;
}
.cat-hero .breadcrumb-nav{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:rgba(255,255,255,.7);
  margin-bottom:20px;
}
.cat-hero .breadcrumb-nav a{color:rgba(255,255,255,.75)}
.cat-hero .breadcrumb-nav a:hover{color:var(--accent)}
.cat-hero .breadcrumb-nav i{font-size:10px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.22);
  padding:7px 16px;border-radius:50rem;
  font-size:13px;font-weight:600;color:#fff;
  margin-bottom:20px;
  backdrop-filter:blur(6px);
}
.cat-hero h1{
  font-size:40px;font-weight:800;letter-spacing:-1px;
  margin-bottom:16px;line-height:1.25;
}
.cat-hero .hero-desc{
  font-size:16px;color:rgba(255,255,255,.88);
  max-width:680px;line-height:1.8;
  margin-bottom:36px;
}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:14px;
}
.hero-stat{
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.16);
  border-radius:14px;padding:16px 22px;
  min-width:148px;
  backdrop-filter:blur(4px);
}
.hero-stat .num{font-size:28px;font-weight:800;color:var(--accent);line-height:1.2}
.hero-stat .label{font-size:13px;color:rgba(255,255,255,.72);margin-top:2px}

/* 快速上手步骤 */
.step-card{
  position:relative;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-lg);
  padding:30px 26px;height:100%;
  transition:all var(--transition);overflow:hidden;
}
.step-card::before{
  content:'';position:absolute;left:0;top:0;bottom:0;width:4px;
  background:var(--primary);opacity:0;transition:opacity var(--transition);
}
.step-card:hover{transform:translateY(-6px);box-shadow:var(--sh);border-color:transparent}
.step-card:hover::before{opacity:1}
.step-num{
  position:absolute;right:20px;top:12px;
  font-size:46px;font-weight:800;color:#eef2f7;line-height:1;
}
.step-icon{
  width:52px;height:52px;border-radius:14px;
  background:var(--primary-light);color:var(--primary);
  font-size:20px;display:inline-flex;align-items:center;justify-content:center;
  margin-bottom:20px;transition:all var(--transition);
}
.step-card:hover .step-icon{background:var(--primary);color:#fff}
.step-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.step-card p{font-size:14px;color:var(--weak);line-height:1.75;margin-bottom:0}

/* 教程卡片 */
.guide-card{
  background:var(--card);border-radius:var(--r-lg);
  overflow:hidden;border:1px solid var(--line);
  height:100%;display:flex;flex-direction:column;
  transition:all var(--transition);
}
.guide-card:hover{transform:translateY(-6px);box-shadow:var(--sh-lg);border-color:transparent}
.guide-card .thumb{position:relative;overflow:hidden;aspect-ratio:16/10}
.guide-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.guide-card:hover .thumb img{transform:scale(1.06)}
.guide-card .tag{
  position:absolute;left:14px;top:14px;z-index:2;
  background:rgba(15,23,42,.82);color:#fff;
  font-size:12px;font-weight:600;padding:5px 14px;border-radius:50rem;
  backdrop-filter:blur(4px);
}
.guide-card .tag.gold{background:rgba(245,158,11,.92);color:#1e293b}
.guide-card .card-body{padding:22px 22px 18px;display:flex;flex-direction:column;flex:1}
.guide-card h3{font-size:17px;font-weight:700;line-height:1.45;margin-bottom:10px}
.guide-card h3 a{color:var(--ink)}
.guide-card h3 a:hover{color:var(--primary)}
.guide-card p{font-size:14px;color:var(--weak);line-height:1.7;flex:1;margin-bottom:14px}
.guide-card .card-meta{
  display:flex;align-items:center;justify-content:space-between;
  padding-top:14px;border-top:1px solid var(--line);
}
.guide-card .card-meta .read{font-size:13px;color:var(--weak)}
.guide-card .card-meta a{
  font-size:13px;font-weight:700;color:var(--primary);
  display:inline-flex;align-items:center;gap:6px;
}
.guide-card .card-meta a i{font-size:11px;transition:transform var(--transition)}
.guide-card .card-meta a:hover{color:var(--accent)}
.guide-card .card-meta a:hover i{transform:translateX(3px)}
.guide-card .cover-overlay{
  position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(15,23,42,.35));
  z-index:1;
}

/* 深色数据带 */
.dark-band{
  position:relative;color:#fff;overflow:hidden;
  background:linear-gradient(120deg,rgba(15,23,42,.96),rgba(30,58,138,.9)),url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.dark-band .feature-list{list-style:none;padding:0;margin:0}
.dark-band .feature-list li{
  display:flex;align-items:flex-start;gap:12px;
  padding:12px 0;border-bottom:1px solid rgba(255,255,255,.1);
  font-size:15px;
}
.dark-band .feature-list li:last-child{border-bottom:0}
.dark-band .feature-list i{
  color:var(--accent);font-size:16px;margin-top:4px;flex-shrink:0;
}
.dark-band .band-title{font-size:28px;font-weight:800;margin-bottom:14px;letter-spacing:-.4px}
.dark-band .band-desc{color:rgba(255,255,255,.82);font-size:15px;line-height:1.8;margin-bottom:24px}
.band-stats{
  display:grid;grid-template-columns:1fr 1fr;gap:16px;
}
.band-stat{
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.14);
  border-radius:16px;padding:24px 20px;text-align:center;
  backdrop-filter:blur(4px);
  transition:all var(--transition);
}
.band-stat:hover{background:rgba(255,255,255,.12);transform:translateY(-3px)}
.band-stat .num{font-size:32px;font-weight:800;color:var(--accent);line-height:1.2}
.band-stat .label{font-size:13px;color:rgba(255,255,255,.72);margin-top:4px}

/* FAQ */
.faq-accordion{max-width:860px;margin:0 auto}
.faq-item{
  background:var(--card);border:1px solid var(--line);
  border-radius:16px;margin-bottom:14px;overflow:hidden;
  transition:all var(--transition);
}
.faq-item:hover{border-color:#c7d2e8;box-shadow:var(--sh-sm)}
.faq-item .faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;cursor:pointer;font-weight:700;font-size:16px;
  color:var(--ink);background:var(--card);width:100%;text-align:left;
  border:0;transition:background var(--transition);
}
.faq-item .faq-q:hover{background:#fafbfe}
.faq-item .faq-q i{
  color:var(--primary);font-size:14px;flex-shrink:0;
  transition:transform var(--transition);
}
.faq-item.active{border-color:var(--primary);box-shadow:0 8px 22px rgba(30,58,138,.08)}
.faq-item.active .faq-q i{transform:rotate(180deg)}
.faq-item .faq-a{
  display:none;padding:0 24px 22px;color:var(--weak);
  font-size:15px;line-height:1.85;
}
.faq-item.active .faq-a{display:block}

/* CTA 区 */
.cta-section{
  position:relative;padding:80px 0 0;
}
.cta-box{
  position:relative;overflow:hidden;border-radius:24px;
  padding:58px 48px;color:#fff;text-align:center;
  background:linear-gradient(120deg,rgba(15,23,42,.94),rgba(30,58,138,.88)),url('/assets/images/backpic/back-3.png') center/cover no-repeat;
}
.cta-box h2{font-size:30px;font-weight:800;letter-spacing:-.5px;margin-bottom:12px}
.cta-box p{color:rgba(255,255,255,.85);max-width:600px;margin:0 auto 28px;font-size:15px;line-height:1.8}
.cta-box .btn-group{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

/* 页脚 */
.site-footer{
  background:var(--navy);color:rgba(255,255,255,.75);
  padding:64px 0 0;margin-top:80px;
}
.site-footer .footer-brand{
  display:flex;align-items:center;gap:12px;
  font-size:20px;font-weight:800;color:#fff;margin-bottom:18px;
}
.site-footer .footer-brand .brand-icon{
  width:38px;height:38px;border-radius:10px;font-size:16px;
  background:var(--accent);box-shadow:0 6px 14px rgba(245,158,11,.3);
}
.footer-about{font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:320px}
.footer-title{
  font-size:15px;font-weight:700;color:#fff;
  margin-bottom:18px;position:relative;padding-bottom:10px;
}
.footer-title::after{
  content:'';position:absolute;left:0;bottom:0;width:26px;height:3px;
  background:var(--accent);border-radius:4px;
}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin-bottom:10px}
.footer-links a{
  color:rgba(255,255,255,.65);font-size:14px;
  display:inline-flex;align-items:center;gap:6px;
  transition:all var(--transition);
}
.footer-links a i{font-size:11px;color:var(--accent);transition:transform var(--transition)}
.footer-links a:hover{color:#fff}
.footer-links a:hover i{transform:translateX(3px)}
.footer-contact li{
  display:flex;align-items:center;gap:10px;
  color:rgba(255,255,255,.65);font-size:14px;margin-bottom:10px;
}
.footer-contact i{color:var(--accent);width:16px;text-align:center}
.footer-bottom{
  margin-top:44px;padding:20px 0;
  border-top:1px solid rgba(255,255,255,.1);
  text-align:center;font-size:13px;
  color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.7)}
.footer-bottom a:hover{color:var(--accent)}

/* 响应式 */
@media (max-width:991px){
  .mobile-menu{display:none}
  .mobile-menu.open{display:block}
  .cat-hero{padding:64px 0 56px}
  .cat-hero h1{font-size:32px}
  .hero-stat{min-width:130px;padding:14px 18px}
  .hero-stat .num{font-size:24px}
  .band-stats{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  :root{--space:56px}
  .topbar-inner{height:64px}
  .brand-text{font-size:17px}
  .brand-icon{width:38px;height:38px;font-size:16px}
  .header-search{display:none}
  .btn-accent{padding:9px 16px;font-size:13px}
  .sec-title{font-size:24px}
  .cat-hero h1{font-size:28px}
  .cat-hero .hero-desc{font-size:14px}
  .hero-stats{gap:10px}
  .hero-stat{min-width:calc(50% - 10px);padding:12px 16px}
  .hero-stat .num{font-size:22px}
  .step-card{padding:24px 20px}
  .cta-box{padding:44px 22px}
  .cta-box h2{font-size:24px}
  .faq-item .faq-q{font-size:15px;padding:18px 18px}
  .faq-item .faq-a{padding:0 18px 20px;font-size:14px}
  .site-footer{padding-top:48px}
}
@media (max-width:520px){
  .topbar-actions{gap:10px}
  .brand-text{font-size:15px}
  .brand-icon{width:34px;height:34px;font-size:14px}
  .cat-hero{padding:52px 0 44px}
  .cat-hero h1{font-size:24px}
  .band-stats{grid-template-columns:1fr 1fr;gap:10px}
  .band-stat{padding:18px 10px}
  .band-stat .num{font-size:24px}
  .cta-box .btn-group{flex-direction:column;align-items:center}
}

/* roulang page: article */
:root {
            --primary: #0f2b46;
            --primary-light: #1c4776;
            --primary-bg: #eef3f9;
            --accent: #d4a643;
            --accent-hover: #b98e30;
            --accent-soft: #fdf6e8;
            --surface: #ffffff;
            --bg: #f4f7fb;
            --text: #16202e;
            --text-muted: #61758f;
            --border: #e2eaf3;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 2px 12px rgba(15, 43, 70, .06);
            --shadow: 0 10px 32px rgba(15, 43, 70, .09);
            --shadow-lg: 0 20px 48px rgba(15, 43, 70, .14);
            --transition: all .3s 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", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        button {
            border: none;
            background: none;
            cursor: pointer;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        .btn {
            border-radius: 10px;
            font-weight: 600;
            padding: 11px 26px;
            transition: var(--transition);
        }

        .btn-accent {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
            border-radius: 10px;
            font-weight: 600;
            padding: 11px 26px;
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(212, 166, 67, .35);
        }

        .btn-outline-accent {
            border: 2px solid var(--accent);
            color: var(--accent);
            background: transparent;
            border-radius: 10px;
            font-weight: 600;
            padding: 10px 24px;
        }

        .btn-outline-accent:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-primary-green {
            background: var(--primary);
            border: 1px solid var(--primary);
            color: #fff;
            border-radius: 10px;
            font-weight: 600;
            padding: 11px 26px;
        }

        .btn-primary-green:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(15, 43, 70, .3);
        }

        .btn-light-custom {
            background: #fff;
            color: var(--primary);
            border-radius: 10px;
            font-weight: 600;
            padding: 12px 28px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .1);
        }

        .btn-light-custom:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(212, 166, 67, .35);
        }

        .btn-outline-light-rounded {
            border: 2px solid rgba(255, 255, 255, .65);
            color: #fff;
            border-radius: 10px;
            font-weight: 600;
            padding: 11px 26px;
        }

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

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(15, 43, 70, .08);
        }

        .header-top {
            background: var(--surface);
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
        }

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

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
        }

        .brand-icon {
            width: 46px;
            height: 46px;
            border-radius: 13px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: 0 6px 18px rgba(15, 43, 70, .25);
        }

        .brand-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.5px;
        }

        .brand-text small {
            display: block;
            font-size: 11px;
            font-weight: 500;
            color: var(--text-muted);
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 50px;
            padding: 7px 8px 7px 18px;
            transition: var(--transition);
        }

        .header-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(212, 166, 67, .15);
        }

        .header-search input {
            border: none;
            background: transparent;
            outline: none;
            width: 180px;
            font-size: 14px;
            color: var(--text);
        }

        .header-search input::placeholder {
            color: #94a3b8;
        }

        .header-search button {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .header-search button:hover {
            background: var(--accent-hover);
            transform: scale(1.06);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            border-radius: 50px;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
        }

        .header-cta:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(212, 166, 67, .35);
        }

        /* ===== Channel Nav ===== */
        .channel-nav {
            background: var(--primary);
            border-top: 1px solid rgba(255, 255, 255, .06);
        }

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

        .channel-nav-wrap::-webkit-scrollbar {
            display: none;
        }

        .channel-nav-wrap a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 18px;
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, .7);
            white-space: nowrap;
            border-bottom: 3px solid transparent;
            transition: var(--transition);
        }

        .channel-nav-wrap a i {
            font-size: 14px;
            color: var(--accent);
            transition: var(--transition);
        }

        .channel-nav-wrap a:hover {
            color: #fff;
            background: rgba(255, 255, 255, .08);
        }

        .channel-nav-wrap a.active {
            color: #fff;
            background: rgba(255, 255, 255, .1);
            border-bottom-color: var(--accent);
            font-weight: 600;
        }

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

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 100px 0 90px;
            overflow: hidden;
        }

        .article-hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(10, 28, 48, .92), rgba(10, 28, 48, .72) 45%, rgba(15, 43, 70, .45));
            z-index: 1;
        }

        .article-hero-inner {
            position: relative;
            z-index: 2;
            color: #fff;
            max-width: 880px;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, .65);
            margin-bottom: 26px;
        }

        .breadcrumb-nav a {
            color: rgba(255, 255, 255, .7);
        }

        .breadcrumb-nav a:hover {
            color: var(--accent);
        }

        .breadcrumb-nav i {
            font-size: 11px;
            color: rgba(255, 255, 255, .4);
        }

        .breadcrumb-nav .current {
            color: var(--accent);
        }

        .article-hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 18px;
        }

        .badge-category {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 50px;
            box-shadow: 0 4px 12px rgba(212, 166, 67, .35);
        }

        .badge-brand {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, .13);
            color: rgba(255, 255, 255, .92);
            font-size: 13px;
            font-weight: 500;
            padding: 5px 14px;
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, .2);
            backdrop-filter: blur(4px);
        }

        .article-hero-inner h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.28;
            margin-bottom: 18px;
        }

        .article-hero-desc {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .8);
            margin-bottom: 24px;
            max-width: 720px;
        }

        .article-hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 22px;
            font-size: 14px;
            color: rgba(255, 255, 255, .65);
        }

        .article-hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .article-hero-meta i {
            color: var(--accent);
        }

        /* ===== Article Main ===== */
        .article-main-sec {
            padding: 70px 0;
        }

        .article-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(226, 234, 243, .6);
            margin-bottom: 32px;
        }

        .article-content {
            font-size: 17px;
            line-height: 1.9;
            color: #2e3a4d;
        }

        .article-content h2,
        .article-content h3,
        .article-content h4 {
            color: var(--text);
            font-weight: 700;
            margin-top: 34px;
            margin-bottom: 16px;
            line-height: 1.4;
        }

        .article-content h2 {
            font-size: 26px;
            padding-left: 16px;
            border-left: 4px solid var(--accent);
            border-radius: 2px;
        }

        .article-content h3 {
            font-size: 21px;
        }

        .article-content p {
            margin-bottom: 20px;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 22px;
            padding-left: 26px;
        }

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

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

        .article-content a:hover {
            color: var(--accent-hover);
        }

        .article-content img {
            border-radius: var(--radius);
            margin: 28px 0;
            box-shadow: var(--shadow);
        }

        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: var(--accent-soft);
            padding: 18px 22px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 28px 0;
            color: #6b5b33;
            font-style: italic;
        }

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

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 28px 0;
            font-size: 15px;
        }

        .article-content table th,
        .article-content table td {
            padding: 12px 14px;
            border: 1px solid var(--border);
        }

        .article-content table th {
            background: var(--primary-bg);
            font-weight: 600;
            color: var(--primary);
        }

        .not-found-box {
            text-align: center;
            padding: 60px 20px;
        }

        .not-found-box .icon-wrap {
            width: 90px;
            height: 90px;
            border-radius: 50%;
            background: var(--accent-soft);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 36px;
            margin: 0 auto 26px;
        }

        .not-found-box h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 14px;
        }

        .not-found-box p {
            color: var(--text-muted);
            font-size: 16px;
            margin-bottom: 28px;
        }

        /* ===== Share ===== */
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 28px;
            padding: 18px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            flex-wrap: wrap;
        }

        .article-share span {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 600;
        }

        .share-btn {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg);
            color: var(--text-muted);
            border: 1px solid var(--border);
            transition: var(--transition);
            font-size: 15px;
        }

        .share-btn:hover {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(212, 166, 67, .25);
        }

        /* ===== Pagination ===== */
        .article-pagination {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .article-pagination a {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 13px 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .article-pagination a:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        .article-pagination .next-link {
            margin-left: auto;
        }

        /* ===== Sidebar ===== */
        .sidebar {
            position: sticky;
            top: 110px;
        }

        .sidebar-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 26px;
            box-shadow: var(--shadow);
            margin-bottom: 24px;
            border: 1px solid rgba(226, 234, 243, .5);
        }

        .sidebar-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 22px;
            position: relative;
            padding-left: 14px;
        }

        .sidebar-card h3::before {
            content: '';
            position: absolute;
            left: 0;
            top: 3px;
            width: 4px;
            height: 20px;
            background: var(--accent);
            border-radius: 3px;
        }

        .category-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .category-list-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 13px 16px;
            border-radius: 12px;
            background: var(--bg);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .category-list-item:hover {
            background: var(--accent-soft);
            border-color: var(--accent);
            transform: translateX(5px);
            box-shadow: 0 4px 14px rgba(212, 166, 67, .12);
        }

        .category-list-item .cat-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 16px;
            box-shadow: 0 4px 12px rgba(15, 43, 70, .18);
        }

        .category-list-item .cat-info {
            flex: 1;
            min-width: 0;
        }

        .category-list-item .cat-info strong {
            display: block;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
        }

        .category-list-item .cat-info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        .category-list-item .cat-arrow {
            color: #c0ccdb;
            font-size: 13px;
            transition: var(--transition);
        }

        .category-list-item:hover .cat-arrow {
            color: var(--accent);
            transform: translateX(3px);
        }

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

        .latest-list li {
            padding: 12px 0;
            border-bottom: 1px dashed var(--border);
        }

        .latest-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .latest-list a {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text);
            line-height: 1.55;
        }

        .latest-list a:hover {
            color: var(--accent);
        }

        .latest-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            margin-top: 8px;
            flex-shrink: 0;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius);
            padding: 30px 26px;
            color: #fff;
            text-align: center;
            box-shadow: 0 10px 30px rgba(15, 43, 70, .25);
        }

        .sidebar-cta h4 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .sidebar-cta p {
            font-size: 14px;
            color: rgba(255, 255, 255, .75);
            margin-bottom: 22px;
            line-height: 1.6;
        }

        .sidebar-cta .btn-accent {
            width: 100%;
        }

        /* ===== Related ===== */
        .related-sec {
            padding: 80px 0;
            background: var(--surface);
            border-top: 1px solid var(--border);
        }

        .section-head {
            text-align: center;
            margin-bottom: 46px;
        }

        .section-head h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }

        .section-head h2::after {
            content: '';
            display: block;
            width: 48px;
            height: 4px;
            border-radius: 4px;
            background: var(--accent);
            margin: 12px auto 0;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 15px;
            margin-top: 14px;
        }

        .related-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(212, 166, 67, .4);
        }

        .related-cover {
            position: relative;
            display: block;
            overflow: hidden;
            aspect-ratio: 16 / 10;
        }

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

        .related-card:hover .related-cover img {
            transform: scale(1.06);
        }

        .related-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(15, 43, 70, .45));
        }

        .related-cat {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(255, 255, 255, .92);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            backdrop-filter: blur(4px);
        }

        .related-body {
            padding: 20px 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-body h3 {
            font-size: 16px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
        }

        .related-body h3 a {
            color: var(--text);
        }

        .related-body h3 a:hover {
            color: var(--accent);
        }

        .related-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-date {
            font-size: 12px;
            color: #a0aebb;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* ===== CTA ===== */
        .cta-sec {
            padding: 80px 0;
            background: var(--bg);
        }

        .cta-box {
            background: linear-gradient(135deg, var(--primary) 0%, #17395e 60%, var(--primary-light) 100%);
            border-radius: var(--radius-lg);
            padding: 50px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            box-shadow: 0 20px 50px rgba(15, 43, 70, .35);
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            right: -60px;
            top: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(212, 166, 67, .15);
        }

        .cta-box::after {
            content: '';
            position: absolute;
            right: 60px;
            bottom: -80px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .05);
        }

        .cta-text {
            flex: 1;
            min-width: 280px;
            position: relative;
            z-index: 2;
        }

        .cta-text h2 {
            font-size: 30px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .cta-text p {
            font-size: 16px;
            color: rgba(255, 255, 255, .78);
            max-width: 520px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0a1f36;
            color: rgba(255, 255, 255, .72);
            padding: 72px 0 0;
            border-top: 3px solid var(--accent);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-brand .brand-icon {
            width: 48px;
            height: 48px;
            background: var(--accent);
            color: #fff;
            font-size: 20px;
        }

        .footer-about {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .55);
            max-width: 360px;
        }

        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 22px;
            position: relative;
            padding-bottom: 12px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 30px;
            height: 3px;
            border-radius: 4px;
            background: var(--accent);
        }

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

        .footer-links li {
            margin-bottom: 11px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, .6);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
            transform: translateX(5px);
        }

        .footer-links a i {
            font-size: 12px;
            color: var(--accent);
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            margin-bottom: 12px;
        }

        .footer-contact li i {
            color: var(--accent);
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 20px 0;
            text-align: center;
            margin-top: 56px;
            color: rgba(255, 255, 255, .4);
            font-size: 14px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, .6);
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-hero-inner h1 {
                font-size: 34px;
            }

            .article-card {
                padding: 30px;
            }
        }

        @media (max-width: 768px) {
            .header-search {
                display: none;
            }

            .brand-text {
                font-size: 19px;
            }

            .sidebar {
                position: static;
                margin-top: 40px;
            }

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

            .article-hero-inner h1 {
                font-size: 28px;
            }

            .article-hero-desc {
                font-size: 15px;
            }

            .article-card {
                padding: 22px;
            }

            .article-content {
                font-size: 16px;
            }

            .section-head h2 {
                font-size: 28px;
            }

            .cta-box {
                padding: 36px 28px;
                flex-direction: column;
                text-align: center;
            }

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

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

        @media (max-width: 520px) {
            .header-top-inner {
                gap: 12px;
            }

            .brand-icon {
                width: 40px;
                height: 40px;
                font-size: 17px;
            }

            .brand-text {
                font-size: 17px;
            }

            .brand-text small {
                font-size: 10px;
            }

            .header-cta {
                padding: 8px 16px;
                font-size: 13px;
            }

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

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

            .article-hero-meta {
                gap: 14px;
                font-size: 13px;
                flex-direction: column;
            }

            .article-card {
                padding: 18px;
                border-radius: 16px;
            }

            .article-content h2 {
                font-size: 21px;
            }

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

            .article-pagination {
                flex-direction: column;
            }

            .article-pagination .next-link {
                margin-left: 0;
            }

            .related-card .related-body h3 {
                font-size: 15px;
            }

            .footer-bottom {
                font-size: 13px;
            }
        }

/* roulang page: category3 */
:root {
  --primary: #1e3a8a;
  --primary-dark: #142a66;
  --primary-light: #3b82f6;
  --accent: #06b6d4;
  --accent-soft: #e0f7fa;
  --dark: #0b1526;
  --bg: #f6f8fc;
  --surface: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow: 0 8px 30px rgba(15, 23, 42, .07);
  --shadow-lg: 0 16px 40px rgba(30, 58, 138, .14);
  --transition: all .3s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

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

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

.container {
  max-width: 1200px;
}

.pt-80 {
  padding-top: 80px;
}

.pb-80 {
  padding-bottom: 80px;
}

/* ======== Buttons ======== */
.btn {
  border-radius: 50px;
  font-weight: 600;
  padding: .7rem 1.6rem;
  transition: var(--transition);
}

.btn-lg {
  padding: .9rem 2.2rem;
  font-size: 1rem;
}

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

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
  background-color: var(--primary-light);
  border-color: var(--primary-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(59, 130, 246, .3);
}

.btn-outline-light {
  border: 2px solid rgba(255, 255, 255, .7);
  color: #fff;
}

.btn-outline-light:hover,
.btn-outline-light:focus {
  background: rgba(255, 255, 255, .12);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}

.btn-outline-brand {
  border: 2px solid var(--primary);
  color: var(--primary);
}

.btn-outline-brand:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(30, 58, 138, .2);
}

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

.btn-light:hover,
.btn-light:focus {
  background: var(--accent-soft);
  border-color: var(--accent-soft);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, .12);
}

/* ======== Header ======== */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1030;
  box-shadow: 0 2px 12px rgba(15, 23, 42, .04);
}

.top-bar {
  padding: 12px 0;
}

.top-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: .5px;
  line-height: 1.2;
}

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

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  box-shadow: 0 6px 16px rgba(30, 58, 138, .25);
}

.brand-text {
  font-size: 1.2rem;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

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

.header-search input {
  width: 220px;
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: .45rem 2.4rem .45rem 1rem;
  font-size: .9rem;
  outline: none;
  background: var(--bg);
  transition: var(--transition);
}

.header-search input:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, .12);
  background: #fff;
}

.header-search button {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 50%;
  transition: var(--transition);
}

.header-search button:hover {
  color: var(--primary);
}

.btn-header {
  background: var(--primary);
  color: #fff;
  border-radius: 50px;
  padding: .5rem 1.2rem;
  font-size: .9rem;
  font-weight: 600;
  border: none;
}

.btn-header:hover {
  background: var(--primary-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(30, 58, 138, .25);
}

/* ======== Channel Nav ======== */
.channel-nav {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.channel-nav-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  white-space: nowrap;
}

.channel-nav-wrap::-webkit-scrollbar {
  display: none;
}

.channel-nav-wrap a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: .5rem 1.1rem;
  border-radius: 50px;
  font-size: .95rem;
  font-weight: 500;
  color: var(--muted);
  transition: var(--transition);
  flex-shrink: 0;
}

.channel-nav-wrap a i {
  font-size: .9rem;
}

.channel-nav-wrap a:hover {
  background: var(--accent-soft);
  color: var(--primary);
}

.channel-nav-wrap a.active {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  box-shadow: 0 6px 16px rgba(30, 58, 138, .28);
}

/* ======== Mobile Nav ======== */
.mobile-nav {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.mobile-nav-inner {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 10px 0;
  white-space: nowrap;
  scrollbar-width: none;
}

.mobile-nav-inner::-webkit-scrollbar {
  display: none;
}

.mobile-nav-inner a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: .4rem .9rem;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 500;
  color: var(--muted);
  background: var(--bg);
  flex-shrink: 0;
}

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

/* ======== Hero ======== */
.page-hero {
  position: relative;
  padding: 100px 0 90px;
  color: #fff;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(11, 21, 38, .93) 0%, rgba(20, 42, 102, .88) 55%, rgba(6, 182, 212, .75) 100%),
    url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  right: -60px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(6, 182, 212, .35) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, .15);
  border: 1px solid rgba(255, 255, 255, .25);
  backdrop-filter: blur(8px);
  padding: .5rem 1.1rem;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-badge i {
  color: #67e8f9;
}

.page-hero h1 {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: .5px;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, .88);
  max-width: 600px;
  margin-bottom: 32px;
  line-height: 1.8;
}

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

.hero-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, .35);
  border: 1px solid rgba(255, 255, 255, .2);
  transform: rotate(1.5deg);
  transition: var(--transition);
}

.hero-visual:hover {
  transform: rotate(0deg) scale(1.02);
}

.hero-visual img {
  width: 100%;
  min-height: 320px;
  object-fit: cover;
}

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

.bg-soft {
  background: #f1f5fb;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-soft);
  color: var(--primary);
  padding: .35rem 1rem;
  border-radius: 50px;
  font-size: .82rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 14px;
}

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

/* ======== Feature Cards ======== */
.feature-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 30px 26px;
  height: 100%;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}

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

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

.feature-icon {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 20px;
  box-shadow: 0 10px 20px rgba(30, 58, 138, .2);
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--muted);
  font-size: .93rem;
  margin-bottom: 0;
  line-height: 1.7;
}

/* ======== System Cards ======== */
.system-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  height: 100%;
  transition: var(--transition);
}

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

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

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

.system-card:hover .system-card-img img {
  transform: scale(1.06);
}

.system-card-img::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(11, 21, 38, .35) 0%, transparent 60%);
}

.system-card-body {
  padding: 24px 24px 26px;
}

.system-card-body .badge-tag {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--primary);
  font-size: .78rem;
  font-weight: 600;
  padding: .3rem .8rem;
  border-radius: 50px;
  margin-bottom: 12px;
}

.system-card-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 10px;
}

.system-card-body p {
  color: var(--muted);
  font-size: .92rem;
  line-height: 1.7;
  margin-bottom: 0;
}

/* ======== Process ======== */
.process-img-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.process-img-wrap img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.process-content h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 14px;
}

.process-content > p {
  color: var(--muted);
  margin-bottom: 30px;
}

.process-steps {
  list-style: none;
  padding: 0;
  margin: 0;
}

.process-steps li {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.process-steps li:last-child {
  border-bottom: none;
}

.step-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
  box-shadow: 0 6px 14px rgba(30, 58, 138, .22);
}

.step-text h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 4px;
}

.step-text p {
  color: var(--muted);
  font-size: .92rem;
  margin-bottom: 0;
}

/* ======== Stats ======== */
.stats-section {
  background:
    linear-gradient(135deg, rgba(11, 21, 38, .92) 0%, rgba(20, 42, 102, .9) 100%),
    url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
  padding: 80px 0;
  color: #fff;
}

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

.stats-section .section-head p {
  color: rgba(255, 255, 255, .75);
}

.stats-section .section-tag {
  background: rgba(255, 255, 255, .12);
  color: #a5f3fc;
}

.stat-item {
  text-align: center;
  padding: 32px 20px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
  transition: var(--transition);
}

.stat-item:hover {
  background: rgba(255, 255, 255, .1);
  transform: translateY(-4px);
}

.stat-item .stat-num {
  font-size: 2.6rem;
  font-weight: 800;
  background: linear-gradient(135deg, #fff 0%, #a5f3fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.stat-item .stat-label {
  color: rgba(255, 255, 255, .8);
  font-size: .92rem;
  margin-top: 8px;
}

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

.accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius) !important;
  margin-bottom: 14px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--surface);
}

.accordion-button {
  font-size: 1rem;
  font-weight: 600;
  color: var(--dark);
  background: var(--surface);
  padding: 1.1rem 1.4rem;
  transition: var(--transition);
}

.accordion-button:not(.collapsed) {
  background: var(--accent-soft);
  color: var(--primary);
  box-shadow: none;
}

.accordion-button:focus {
  box-shadow: 0 0 0 4px rgba(6, 182, 212, .15);
  border-color: transparent;
}

.accordion-button::after {
  background-size: 14px;
  opacity: .6;
}

.accordion-body {
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.75;
  padding: 1.2rem 1.4rem 1.4rem;
}

/* ======== CTA ======== */
.cta-section {
  padding: 80px 0;
}

.cta-box {
  background: linear-gradient(135deg, rgba(11, 21, 38, .94) 0%, rgba(30, 58, 138, .92) 100%),
    url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  border-radius: var(--radius-lg);
  padding: 60px 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(6, 182, 212, .35) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-box::after {
  content: '';
  position: absolute;
  bottom: -60px;
  left: -40px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(59, 130, 246, .3) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-box h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-box p {
  color: rgba(255, 255, 255, .85);
  max-width: 620px;
  margin: 0 auto 28px;
  font-size: 1rem;
  position: relative;
  z-index: 1;
}

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

/* ======== Footer ======== */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, .75);
  padding: 64px 0 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-brand .brand-icon {
  width: 40px;
  height: 40px;
  font-size: 1rem;
}

.footer-about {
  font-size: .92rem;
  color: rgba(255, 255, 255, .6);
  line-height: 1.8;
  max-width: 340px;
}

.footer-title {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}

.footer-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
  border-radius: 3px;
}

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

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

.footer-links a {
  color: rgba(255, 255, 255, .65);
  font-size: .92rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.footer-links a:hover {
  color: #fff;
  transform: translateX(4px);
}

.footer-links a i {
  font-size: .75rem;
  color: var(--accent);
}

.footer-contact li {
  color: rgba(255, 255, 255, .65);
  font-size: .92rem;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.footer-contact i {
  color: var(--accent);
  width: 18px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding-top: 22px;
  margin-top: 40px;
  text-align: center;
  font-size: .88rem;
  color: rgba(255, 255, 255, .5);
}

.footer-bottom a {
  color: rgba(255, 255, 255, .7);
}

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

/* ======== Scrollbar ======== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-light);
}

/* ======== Responsive ======== */
@media (max-width: 991px) {
  .page-hero {
    padding: 70px 0 60px;
  }

  .page-hero h1 {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .section {
    padding: 60px 0;
  }

  .section-head h2 {
    font-size: 1.75rem;
  }

  .process-img-wrap img {
    height: 320px;
  }

  .process-content {
    margin-top: 36px;
  }
}

@media (max-width: 767px) {
  .top-bar {
    padding: 10px 0;
  }

  .brand-text {
    font-size: 1.05rem;
  }

  .brand-icon {
    width: 38px;
    height: 38px;
    font-size: .95rem;
  }

  .header-search {
    display: none;
  }

  .btn-header {
    padding: .4rem .9rem;
    font-size: .82rem;
  }

  .page-hero {
    padding: 56px 0 50px;
  }

  .page-hero h1 {
    font-size: 1.8rem;
  }

  .hero-subtitle {
    font-size: .95rem;
    margin-bottom: 24px;
  }

  .hero-actions .btn {
    padding: .65rem 1.3rem;
    font-size: .9rem;
  }

  .hero-actions {
    gap: 10px;
  }

  .section {
    padding: 50px 0;
  }

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

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

  .section-head p {
    font-size: .92rem;
  }

  .feature-card {
    padding: 24px 20px;
  }

  .system-card-img {
    height: 170px;
  }

  .process-img-wrap img {
    height: 240px;
  }

  .process-content h2 {
    font-size: 1.5rem;
  }

  .stat-item .stat-num {
    font-size: 2rem;
  }

  .cta-box {
    padding: 40px 24px;
    border-radius: var(--radius);
  }

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

  .site-footer {
    padding: 48px 0 20px;
  }

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

@media (max-width: 520px) {
  .page-hero h1 {
    font-size: 1.55rem;
  }

  .hero-subtitle {
    font-size: .9rem;
  }

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

  .brand-text {
    font-size: 1rem;
    letter-spacing: 0;
  }

  .brand-icon {
    width: 34px;
    height: 34px;
    border-radius: 10px;
  }

  .btn-header {
    display: none;
  }

  .section-head h2 {
    font-size: 1.35rem;
  }

  .process-steps li {
    gap: 12px;
  }

  .step-num {
    width: 38px;
    height: 38px;
    font-size: .9rem;
  }
}

/* roulang page: category2 */
:root {
        --primary: #2563eb;
        --primary-dark: #1e40af;
        --accent: #0ea5e9;
        --accent-2: #06b6d4;
        --bg: #f8fafc;
        --bg-deep: #0f172a;
        --text: #1e293b;
        --text-weak: #64748b;
        --text-light: #94a3b8;
        --border: #e2e8f0;
        --white: #ffffff;
        --radius: 18px;
        --radius-sm: 12px;
        --shadow: 0 4px 24px rgba(2, 6, 23, 0.08);
        --shadow-lg: 0 16px 48px rgba(2, 6, 23, 0.12);
        --transition: all 0.3s ease;
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        background: var(--bg);
        color: var(--text);
        line-height: 1.7;
        -webkit-font-smoothing: antialiased;
    }

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

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

    button,
    input {
        font-family: inherit;
    }

    .container {
        max-width: 1200px;
    }

    /* ===== Header ===== */
    .site-header {
        background: var(--white);
        position: sticky;
        top: 0;
        z-index: 1050;
        box-shadow: 0 2px 12px rgba(2, 6, 23, 0.06);
    }

    .header-top {
        border-bottom: 1px solid var(--border);
        padding: 16px 0;
    }

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

    .brand-logo {
        display: flex;
        align-items: center;
        gap: 12px;
        flex-shrink: 0;
    }

    .brand-icon {
        width: 42px;
        height: 42px;
        border-radius: 12px;
        background: linear-gradient(135deg, var(--primary), var(--accent-2));
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 18px;
        box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
    }

    .brand-text {
        font-size: 20px;
        font-weight: 700;
        letter-spacing: 0.5px;
        background: linear-gradient(135deg, var(--primary), var(--accent-2));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        white-space: nowrap;
    }

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

    .search-box {
        display: flex;
        align-items: center;
        background: var(--bg);
        border: 1px solid var(--border);
        border-radius: 50px;
        padding: 4px 6px 4px 16px;
        transition: var(--transition);
    }

    .search-box:focus-within {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        background: var(--white);
    }

    .search-box input {
        border: none;
        outline: none;
        background: transparent;
        width: 220px;
        font-size: 14px;
        color: var(--text);
    }

    .search-box input::placeholder {
        color: var(--text-light);
    }

    .search-box button {
        width: 36px;
        height: 36px;
        border-radius: 50px;
        border: none;
        background: linear-gradient(135deg, var(--primary), var(--accent-2));
        color: #fff;
        font-size: 14px;
        cursor: pointer;
        transition: var(--transition);
    }

    .search-box button:hover {
        transform: scale(1.05);
        box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
    }

    .btn-header-cta {
        padding: 9px 22px;
        border-radius: 50px;
        background: var(--primary);
        color: #fff;
        font-size: 14px;
        font-weight: 600;
        border: 1px solid var(--primary);
        transition: var(--transition);
        white-space: nowrap;
    }

    .btn-header-cta:hover {
        background: var(--primary-dark);
        border-color: var(--primary-dark);
        transform: translateY(-1px);
        box-shadow: 0 6px 18px rgba(37, 99, 235, 0.3);
    }

    .channel-nav {
        background: var(--white);
        border-bottom: 1px solid var(--border);
    }

    .channel-nav-wrap {
        display: flex;
        align-items: center;
        gap: 6px;
        padding: 12px 0;
        flex-wrap: nowrap;
        overflow-x: auto;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
    }

    .channel-nav-wrap::-webkit-scrollbar {
        display: none;
    }

    .channel-nav-wrap a {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 8px 18px;
        border-radius: 50px;
        font-size: 14px;
        font-weight: 500;
        color: var(--text-weak);
        border: 1px solid transparent;
        transition: var(--transition);
        white-space: nowrap;
    }

    .channel-nav-wrap a i {
        font-size: 13px;
        color: var(--text-light);
        transition: var(--transition);
    }

    .channel-nav-wrap a:hover {
        color: var(--primary);
        background: rgba(37, 99, 235, 0.06);
        border-color: rgba(37, 99, 235, 0.12);
    }

    .channel-nav-wrap a.active {
        color: var(--primary);
        background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(6, 182, 212, 0.1));
        border-color: rgba(37, 99, 235, 0.2);
        font-weight: 600;
    }

    .channel-nav-wrap a.active i {
        color: var(--primary);
    }

    /* Mobile Nav */
    .mobile-nav {
        background: var(--white);
        border-bottom: 1px solid var(--border);
    }

    .mobile-nav-track {
        display: flex;
        gap: 8px;
        overflow-x: auto;
        padding: 12px 0;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .mobile-nav-track::-webkit-scrollbar {
        display: none;
    }

    .mobile-nav-track a {
        flex-shrink: 0;
        padding: 8px 16px;
        border-radius: 50px;
        font-size: 13px;
        font-weight: 500;
        color: var(--text-weak);
        border: 1px solid var(--border);
        transition: var(--transition);
    }

    .mobile-nav-track a.active {
        color: var(--primary);
        background: rgba(37, 99, 235, 0.08);
        border-color: rgba(37, 99, 235, 0.25);
        font-weight: 600;
    }

    /* ===== Page Hero ===== */
    .page-hero {
        position: relative;
        background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 64, 175, 0.82)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        padding: 96px 0 84px;
        color: var(--white);
        border-bottom: 4px solid rgba(255, 255, 255, 0.08);
    }

    .page-hero .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(255, 255, 255, 0.12);
        border: 1px solid rgba(255, 255, 255, 0.18);
        border-radius: 50px;
        padding: 6px 18px;
        font-size: 13px;
        font-weight: 500;
        letter-spacing: 0.3px;
        backdrop-filter: blur(8px);
        margin-bottom: 20px;
    }

    .page-hero .hero-badge i {
        color: #7dd3fc;
    }

    .page-hero h1 {
        font-size: 42px;
        font-weight: 700;
        line-height: 1.25;
        margin-bottom: 18px;
        letter-spacing: -0.5px;
    }

    .page-hero h1 span {
        background: linear-gradient(90deg, #7dd3fc, #a5b4fc);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .page-hero .hero-desc {
        font-size: 17px;
        color: rgba(255, 255, 255, 0.85);
        max-width: 640px;
        line-height: 1.8;
        margin-bottom: 32px;
    }

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

    .btn-primary-custom {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 12px 28px;
        border-radius: 50px;
        background: linear-gradient(135deg, var(--primary), var(--accent-2));
        color: #fff;
        font-size: 15px;
        font-weight: 600;
        border: none;
        transition: var(--transition);
        box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
        cursor: pointer;
    }

    .btn-primary-custom:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 28px rgba(37, 99, 235, 0.45);
        color: #fff;
    }

    .btn-outline-custom {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 11px 28px;
        border-radius: 50px;
        background: rgba(255, 255, 255, 0.08);
        color: var(--white);
        font-size: 15px;
        font-weight: 500;
        border: 1px solid rgba(255, 255, 255, 0.28);
        transition: var(--transition);
        cursor: pointer;
        backdrop-filter: blur(4px);
    }

    .btn-outline-custom:hover {
        background: rgba(255, 255, 255, 0.18);
        border-color: rgba(255, 255, 255, 0.45);
        color: var(--white);
        transform: translateY(-2px);
    }

    .breadcrumb-wrap {
        margin-top: 40px;
        padding-top: 20px;
        border-top: 1px solid rgba(255, 255, 255, 0.12);
    }

    .breadcrumb {
        margin: 0;
        background: transparent;
        padding: 0;
    }

    .breadcrumb-item {
        font-size: 13px;
        color: rgba(255, 255, 255, 0.6);
    }

    .breadcrumb-item a {
        color: rgba(255, 255, 255, 0.8);
        transition: var(--transition);
    }

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

    .breadcrumb-item.active {
        color: #7dd3fc;
    }

    .breadcrumb-item + .breadcrumb-item::before {
        color: rgba(255, 255, 255, 0.4);
    }

    /* ===== Section Common ===== */
    .section {
        padding: 96px 0;
    }

    .section-sm {
        padding: 72px 0;
    }

    .section-head {
        text-align: center;
        max-width: 700px;
        margin: 0 auto 56px;
    }

    .section-tag {
        display: inline-block;
        padding: 6px 18px;
        border-radius: 50px;
        background: rgba(37, 99, 235, 0.08);
        color: var(--primary);
        font-size: 13px;
        font-weight: 600;
        letter-spacing: 0.5px;
        margin-bottom: 16px;
    }

    .section-title {
        font-size: 32px;
        font-weight: 700;
        line-height: 1.3;
        margin-bottom: 16px;
        color: var(--text);
        letter-spacing: -0.3px;
    }

    .section-desc {
        font-size: 16px;
        color: var(--text-weak);
        line-height: 1.8;
    }

    /* ===== Tag Cloud ===== */
    .tag-cloud {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 14px;
        max-width: 900px;
        margin: 0 auto;
    }

    .tag-item {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 22px;
        border-radius: 50px;
        background: var(--white);
        border: 1px solid var(--border);
        color: var(--text);
        font-size: 14px;
        font-weight: 500;
        transition: var(--transition);
        box-shadow: 0 2px 8px rgba(2, 6, 23, 0.03);
    }

    .tag-item i {
        color: var(--primary);
        font-size: 13px;
    }

    .tag-item:hover {
        border-color: rgba(37, 99, 235, 0.35);
        background: rgba(37, 99, 235, 0.04);
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(37, 99, 235, 0.12);
    }

    /* ===== Feature Cards ===== */
    .feature-section {
        background: var(--white);
    }

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

    .feature-card::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 3px;
        background: linear-gradient(90deg, var(--primary), var(--accent-2));
        opacity: 0;
        transition: var(--transition);
    }

    .feature-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
        border-color: rgba(37, 99, 235, 0.18);
    }

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

    .feature-icon {
        width: 56px;
        height: 56px;
        border-radius: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(6, 182, 212, 0.1));
        color: var(--primary);
        font-size: 22px;
        margin-bottom: 20px;
        transition: var(--transition);
    }

    .feature-card:hover .feature-icon {
        background: linear-gradient(135deg, var(--primary), var(--accent-2));
        color: #fff;
        transform: scale(1.05);
    }

    .feature-card h3 {
        font-size: 19px;
        font-weight: 700;
        color: var(--text);
        margin-bottom: 10px;
    }

    .feature-card p {
        font-size: 14px;
        color: var(--text-weak);
        line-height: 1.75;
        margin-bottom: 0;
    }

    .feature-card .feature-more {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        margin-top: 16px;
        font-size: 13px;
        font-weight: 500;
        color: var(--primary);
        opacity: 0;
        transform: translateY(4px);
        transition: var(--transition);
    }

    .feature-card:hover .feature-more {
        opacity: 1;
        transform: translateY(0);
    }

    /* ===== Rank Section ===== */
    .rank-section {
        background: linear-gradient(135deg, var(--bg-deep) 0%, #1e293b 100%);
        color: var(--white);
    }

    .rank-section .section-tag {
        background: rgba(255, 255, 255, 0.1);
        color: #7dd3fc;
    }

    .rank-section .section-title {
        color: var(--white);
    }

    .rank-section .section-desc {
        color: rgba(255, 255, 255, 0.7);
    }

    .rank-list {
        max-width: 760px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 22px;
    }

    .rank-item {
        display: flex;
        align-items: center;
        gap: 20px;
    }

    .rank-icon {
        width: 44px;
        height: 44px;
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.1);
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        font-size: 16px;
        color: #7dd3fc;
    }

    .rank-info {
        flex: 1;
    }

    .rank-label {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 8px;
        font-size: 14px;
        font-weight: 500;
    }

    .rank-label .rank-num {
        color: #7dd3fc;
        font-weight: 700;
    }

    .rank-bar {
        width: 100%;
        height: 8px;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 20px;
        overflow: hidden;
    }

    .rank-bar-fill {
        height: 100%;
        border-radius: 20px;
        background: linear-gradient(90deg, var(--primary), var(--accent-2));
        width: 0;
        transition: width 1s ease;
    }

    /* ===== Steps Section ===== */
    .steps-section {
        background: var(--bg);
    }

    .steps-list {
        display: flex;
        flex-direction: column;
        gap: 24px;
        margin-top: 8px;
    }

    .step-item {
        display: flex;
        gap: 20px;
        padding: 24px;
        background: var(--white);
        border-radius: var(--radius);
        border: 1px solid var(--border);
        transition: var(--transition);
    }

    .step-item:hover {
        box-shadow: var(--shadow);
        transform: translateX(6px);
        border-color: rgba(37, 99, 235, 0.2);
    }

    .step-num {
        flex-shrink: 0;
        width: 44px;
        height: 44px;
        border-radius: 14px;
        background: linear-gradient(135deg, var(--primary), var(--accent-2));
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        font-weight: 700;
        box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
    }

    .step-body h4 {
        font-size: 17px;
        font-weight: 600;
        margin-bottom: 6px;
        color: var(--text);
    }

    .step-body p {
        font-size: 14px;
        color: var(--text-weak);
        line-height: 1.7;
        margin: 0;
    }

    /* ===== Detail Section ===== */
    .detail-section {
        background: var(--white);
    }

    .detail-img-wrap {
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: var(--shadow-lg);
        position: relative;
    }

    .detail-img-wrap img {
        width: 100%;
        object-fit: cover;
        display: block;
    }

    .detail-img-wrap::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 120px;
        background: linear-gradient(to top, rgba(15, 23, 42, 0.35), transparent);
        border-radius: 0 0 var(--radius) var(--radius);
    }

    .detail-content .section-tag {
        margin-bottom: 12px;
    }

    .detail-content h2 {
        font-size: 28px;
        font-weight: 700;
        line-height: 1.35;
        margin-bottom: 20px;
        color: var(--text);
    }

    .detail-content p {
        font-size: 15px;
        line-height: 1.85;
        color: var(--text-weak);
        margin-bottom: 18px;
    }

    .detail-content .highlight-list {
        list-style: none;
        padding: 0;
        margin: 24px 0 0;
    }

    .highlight-list li {
        display: flex;
        gap: 12px;
        margin-bottom: 12px;
        font-size: 15px;
        color: var(--text);
        align-items: flex-start;
    }

    .highlight-list li i {
        color: var(--accent-2);
        margin-top: 4px;
        flex-shrink: 0;
    }

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

    .faq-wrap {
        max-width: 860px;
        margin: 0 auto;
    }

    .accordion-item {
        border: 1px solid var(--border);
        border-radius: var(--radius-sm) !important;
        overflow: hidden;
        margin-bottom: 16px;
        background: var(--white);
        box-shadow: 0 2px 12px rgba(2, 6, 23, 0.04);
    }

    .accordion-button {
        padding: 22px 26px;
        font-size: 16px;
        font-weight: 600;
        color: var(--text);
        background: var(--white);
        border: none;
        transition: var(--transition);
    }

    .accordion-button:hover {
        background: rgba(37, 99, 235, 0.03);
    }

    .accordion-button:not(.collapsed) {
        color: var(--primary);
        background: rgba(37, 99, 235, 0.05);
        box-shadow: none;
    }

    .accordion-button:focus {
        box-shadow: none;
        outline: none;
    }

    .accordion-button::after {
        background-size: 14px;
        opacity: 0.6;
    }

    .accordion-button:not(.collapsed)::after {
        filter: brightness(0.6);
    }

    .accordion-body {
        padding: 0 26px 24px;
        font-size: 15px;
        color: var(--text-weak);
        line-height: 1.85;
        background: var(--white);
        border-top: 1px solid rgba(226, 232, 240, 0.5);
    }

    /* ===== CTA Section ===== */
    .cta-section {
        padding: 0 0 96px;
        background: var(--bg);
    }

    .cta-inner {
        background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(30, 64, 175, 0.75)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
        border-radius: 28px;
        padding: 68px 48px;
        text-align: center;
        color: var(--white);
        box-shadow: var(--shadow-lg);
        position: relative;
        overflow: hidden;
    }

    .cta-inner::before {
        content: "";
        position: absolute;
        top: -60px;
        right: -60px;
        width: 200px;
        height: 200px;
        background: rgba(255, 255, 255, 0.06);
        border-radius: 50%;
    }

    .cta-title {
        font-size: 30px;
        font-weight: 700;
        margin-bottom: 14px;
        letter-spacing: -0.3px;
    }

    .cta-desc {
        font-size: 16px;
        color: rgba(255, 255, 255, 0.8);
        max-width: 560px;
        margin: 0 auto 32px;
        line-height: 1.8;
    }

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

    /* ===== Footer ===== */
    .site-footer {
        background: var(--bg-deep);
        color: rgba(255, 255, 255, 0.7);
        padding-top: 64px;
    }

    .footer-brand {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 18px;
    }

    .footer-brand .brand-icon {
        width: 38px;
        height: 38px;
        border-radius: 10px;
        background: linear-gradient(135deg, var(--primary), var(--accent-2));
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 16px;
    }

    .footer-brand span:last-child {
        font-size: 19px;
        font-weight: 700;
        color: #fff;
    }

    .footer-about {
        font-size: 14px;
        line-height: 1.8;
        color: rgba(255, 255, 255, 0.6);
        max-width: 340px;
    }

    .footer-title {
        color: #fff;
        font-size: 15px;
        font-weight: 600;
        margin-bottom: 18px;
        letter-spacing: 0.3px;
    }

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

    .footer-links li {
        margin-bottom: 10px;
        font-size: 14px;
    }

    .footer-links a {
        color: rgba(255, 255, 255, 0.6);
        display: inline-flex;
        align-items: center;
        gap: 6px;
        transition: var(--transition);
    }

    .footer-links a i {
        font-size: 12px;
        color: rgba(255, 255, 255, 0.35);
        transition: var(--transition);
    }

    .footer-links a:hover {
        color: var(--accent-2);
        transform: translateX(4px);
    }

    .footer-links a:hover i {
        color: var(--accent-2);
    }

    .footer-contact li {
        display: flex;
        align-items: center;
        gap: 10px;
        color: rgba(255, 255, 255, 0.6);
        font-size: 14px;
    }

    .footer-contact i {
        color: var(--accent-2);
        width: 18px;
        text-align: center;
        font-size: 14px;
    }

    .footer-bottom {
        margin-top: 48px;
        padding: 20px 0;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        font-size: 13px;
        text-align: center;
        color: rgba(255, 255, 255, 0.5);
    }

    .footer-bottom a {
        color: var(--accent-2);
    }

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

    /* ===== Responsive ===== */
    @media (max-width: 991.98px) {
        .section {
            padding: 72px 0;
        }

        .page-hero {
            padding: 64px 0 56px;
        }

        .page-hero h1 {
            font-size: 32px;
        }

        .section-title {
            font-size: 27px;
        }

        .header-tools {
            gap: 10px;
        }

        .search-box input {
            width: 160px;
        }

        .cta-inner {
            padding: 48px 28px;
        }

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

    @media (max-width: 767.98px) {
        .brand-text {
            font-size: 17px;
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            font-size: 15px;
        }

        .header-tools .search-box {
            display: none;
        }

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

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

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

        .section {
            padding: 56px 0;
        }

        .section-title {
            font-size: 24px;
        }

        .feature-card {
            padding: 24px 20px;
        }

        .detail-content h2 {
            font-size: 23px;
        }

        .cta-inner {
            padding: 40px 24px;
            border-radius: 20px;
        }

        .cta-title {
            font-size: 22px;
        }
    }

    @media (max-width: 575.98px) {
        .btn-header-cta {
            padding: 8px 16px;
            font-size: 13px;
        }

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

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

        .step-item {
            padding: 18px;
            gap: 14px;
        }

        .step-num {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            font-size: 14px;
        }

        .accordion-button {
            padding: 18px;
            font-size: 15px;
        }

        .accordion-body {
            padding: 0 18px 18px;
            font-size: 14px;
        }

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

        .footer-brand span:last-child {
            font-size: 17px;
        }
    }