/* roulang page: index */
:root {
  --primary: #0f172a;
  --deep-dark: #0b1220;
  --secondary: #0ea5e9;
  --accent: #f59e0b;
  --surface: #f8fafc;
  --border: #e2e8f0;
  --text-main: #1e293b;
  --text-light: #64748b;
  --radius: 16px;
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.12);
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--surface);
  color: var(--text-main);
  line-height: 1.7;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color 0.25s ease;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button,
input {
  font-family: inherit;
  outline: none;
  border: none;
  background: none;
}
ul,
ol {
  list-style: none;
}
.container-custom {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
.section-pad {
  padding-top: 88px;
  padding-bottom: 88px;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.12), rgba(14, 165, 233, 0.06));
  color: #0284c7;
  font-size: 14px;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 999px;
  letter-spacing: 0.5px;
}
.section-tag i {
  font-size: 13px;
}
.section-title {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--primary);
  margin-top: 14px;
  letter-spacing: -0.5px;
}
.section-subtitle {
  font-size: 16px;
  color: var(--text-light);
  max-width: 620px;
  margin-top: 12px;
  line-height: 1.7;
}
@media (max-width: 768px) {
  .section-pad {
    padding-top: 56px;
    padding-bottom: 56px;
  }
  .section-title {
    font-size: 26px;
  }
}
/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.94);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.18);
}
.header-topbar {
  position: relative;
}
.brand-text {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.3px;
  white-space: nowrap;
}
.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #0ea5e9, #38bdf8);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.4);
}
.header-tagline {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  color: #94a3b8;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.search-box {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  padding: 7px 8px 7px 18px;
  transition: all 0.3s ease;
}
.search-box:hover,
.search-box:focus-within {
  border-color: rgba(14, 165, 233, 0.5);
  background: rgba(255, 255, 255, 0.14);
}
.search-box input {
  background: transparent;
  border: none;
  color: #fff;
  font-size: 13px;
  width: 150px;
}
.search-box input::placeholder {
  color: #94a3b8;
}
.search-box button {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0ea5e9, #38bdf8);
  color: #fff;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.2s ease;
}
.search-box button:hover {
  transform: scale(1.08);
}
.btn-header {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, #f59e0b, #fbbf24);
  color: #0f172a;
  font-size: 13px;
  font-weight: 700;
  padding: 9px 20px;
  border-radius: 999px;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
  transition: all 0.3s ease;
}
.btn-header:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.45);
  color: #0f172a;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 0;
  margin-top: 0;
}
.nav-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 13px 20px;
  color: #cbd5e1;
  font-size: 14px;
  font-weight: 600;
  position: relative;
  transition: color 0.25s ease;
}
.nav-item i {
  font-size: 13px;
  opacity: 0.8;
}
.nav-item:hover {
  color: #fff;
}
.nav-item.active {
  color: #fbbf24;
}
.nav-item.active::after {
  content: '';
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 0;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: linear-gradient(90deg, #f59e0b, #fbbf24);
}
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 18px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.mobile-menu-btn:hover {
  background: rgba(255, 255, 255, 0.14);
}
@media (max-width: 1024px) {
  .header-tagline,
  .header-actions .search-box,
  .header-actions .btn-header {
    display: none !important;
  }
  .mobile-menu-btn {
    display: inline-flex;
  }
  .main-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(15, 23, 42, 0.98);
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: 10px 16px;
    border-radius: 0 0 16px 16px;
  }
  .main-nav.open {
    display: flex;
  }
  .nav-item {
    padding: 14px 16px;
    border-radius: 10px;
  }
  .nav-item:hover {
    background: rgba(255, 255, 255, 0.06);
  }
  .nav-item.active::after {
    display: none;
  }
  .nav-item.active {
    background: rgba(245, 158, 11, 0.14);
  }
}
/* Hero */
.hero {
  position: relative;
  background-color: var(--deep-dark);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.55;
}
.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11, 18, 32, 0.96) 0%, rgba(15, 23, 42, 0.85) 50%, rgba(14, 165, 233, 0.35) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  padding-top: 100px;
  padding-bottom: 100px;
  max-width: 820px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: 999px;
  animation: fadeInDown 0.6s ease both;
}
.hero-title {
  font-size: 52px;
  font-weight: 900;
  line-height: 1.15;
  color: #fff;
  margin-top: 24px;
  letter-spacing: -1px;
  animation: fadeInDown 0.7s ease 0.1s both;
}
.hero-title .accent-text {
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 18px;
  color: #cbd5e1;
  line-height: 1.8;
  margin-top: 20px;
  max-width: 640px;
  animation: fadeInDown 0.7s ease 0.2s both;
}
.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
  animation: fadeInDown 0.7s ease 0.3s both;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, #f59e0b, #fbbf24);
  color: #0f172a;
  font-size: 15px;
  font-weight: 700;
  padding: 14px 30px;
  border-radius: 999px;
  box-shadow: 0 6px 24px rgba(245, 158, 11, 0.4);
  transition: all 0.35s ease;
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(245, 158, 11, 0.5);
  color: #0f172a;
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 14px 30px;
  border-radius: 999px;
  transition: all 0.35s ease;
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-3px);
  color: #fff;
}
.hero-stats {
  display: flex;
  gap: 36px;
  margin-top: 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 28px;
  animation: fadeInDown 0.7s ease 0.4s both;
}
.hero-stat {
  display: flex;
  flex-direction: column;
}
.hero-stat .num {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.5px;
}
.hero-stat .label {
  font-size: 13px;
  color: #94a3b8;
  margin-top: 4px;
}
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (max-width: 768px) {
  .hero-content {
    padding-top: 64px;
    padding-bottom: 64px;
  }
  .hero-title {
    font-size: 34px;
  }
  .hero-subtitle {
    font-size: 16px;
  }
  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }
}
/* Intro Section */
.intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}
.intro-text .lead {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.8;
  margin-top: 20px;
}
.intro-text p {
  margin-top: 16px;
  color: var(--text-light);
  font-size: 15px;
  line-height: 1.8;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.35s ease;
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(14, 165, 233, 0.3);
}
.feature-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.12), rgba(14, 165, 233, 0.05));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #0284c7;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
}
.feature-card p {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 8px;
  line-height: 1.6;
}
.intro-image {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.intro-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 320px;
}
@media (max-width: 1024px) {
  .intro-grid {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}
/* Category Cards */
.category-section {
  background: #fff;
}
.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 36px;
}
.cat-card {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  background: var(--deep-dark);
  box-shadow: var(--shadow);
  transition: all 0.4s ease;
  display: block;
  border: 1px solid rgba(255, 255, 255, 0.06);
}
.cat-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 44px rgba(11, 18, 32, 0.25);
}
.cat-card-img {
  height: 200px;
  overflow: hidden;
  position: relative;
}
.cat-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.cat-card:hover .cat-card-img img {
  transform: scale(1.06);
}
.cat-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(11, 18, 32, 0.75) 100%);
}
.cat-card-body {
  padding: 24px;
  position: relative;
  z-index: 2;
  margin-top: -40px;
}
.cat-card-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
}
.cat-card-body h3 i {
  color: #fbbf24;
  font-size: 16px;
}
.cat-card-body p {
  font-size: 14px;
  color: #cbd5e1;
  line-height: 1.7;
  margin-top: 12px;
}
.cat-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.cat-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #94a3b8;
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
}
.cat-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  color: #0ea5e9;
  font-size: 14px;
  font-weight: 600;
  transition: gap 0.3s ease;
}
.cat-card-link:hover {
  gap: 12px;
  color: #38bdf8;
}
@media (max-width: 1024px) {
  .cat-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 640px) {
  .cat-grid {
    grid-template-columns: 1fr;
  }
}
/* News List */
.news-section {
  background: var(--surface);
}
.news-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  margin-top: 36px;
}
.news-info {
  background: linear-gradient(145deg, var(--deep-dark), #172033);
  border-radius: 20px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 320px;
  position: relative;
  overflow: hidden;
}
.news-info::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(14, 165, 233, 0.2);
  filter: blur(50px);
}
.news-info h3 {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  line-height: 1.5;
}
.news-info p {
  color: #94a3b8;
  font-size: 14px;
  margin-top: 14px;
  line-height: 1.7;
}
.news-info .btn-light {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  margin-top: 22px;
  transition: all 0.3s ease;
  align-self: flex-start;
}
.news-info .btn-light:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-2px);
  color: #fff;
}
.news-list-wrap {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.news-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 20px;
  transition: all 0.3s ease;
}
.news-item:hover {
  border-color: rgba(14, 165, 233, 0.35);
  box-shadow: var(--shadow);
  transform: translateX(4px);
}
.news-cat {
  flex-shrink: 0;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.12), rgba(14, 165, 233, 0.05));
  color: #0284c7;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  white-space: nowrap;
}
.news-title {
  flex: 1;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}
.news-date {
  flex-shrink: 0;
  font-size: 13px;
  color: var(--text-light);
  white-space: nowrap;
}
.empty-tip {
  text-align: center;
  padding: 48px 24px;
  background: #fff;
  border: 1px dashed var(--border);
  border-radius: 16px;
  color: var(--text-light);
  font-size: 15px;
}
@media (max-width: 1024px) {
  .news-layout {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 640px) {
  .news-item {
    flex-wrap: wrap;
  }
  .news-date {
    width: 100%;
    font-size: 12px;
    padding-left: 0;
  }
}
/* Stats Section */
.stats-section {
  background: var(--deep-dark);
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(14, 165, 233, 0.16);
  filter: blur(80px);
}
.stats-section::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -60px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(245, 158, 11, 0.1);
  filter: blur(70px);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
  position: relative;
  z-index: 2;
}
.stat-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 30px 24px;
  transition: all 0.35s ease;
}
.stat-card:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(14, 165, 233, 0.3);
  transform: translateY(-4px);
}
.stat-card .num {
  font-size: 40px;
  font-weight: 900;
  color: #fbbf24;
  line-height: 1.1;
  letter-spacing: -1px;
}
.stat-card .label {
  font-size: 14px;
  color: #94a3b8;
  margin-top: 8px;
  font-weight: 500;
}
.stat-bar {
  height: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  margin-top: 16px;
  overflow: hidden;
}
.stat-bar span {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #0ea5e9, #38bdf8);
}
.stat-bar.gold span {
  background: linear-gradient(90deg, #f59e0b, #fbbf24);
}
@media (max-width: 1024px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 640px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .stat-card .num {
    font-size: 32px;
  }
}
/* Process */
.process-section {
  background: #fff;
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.process-step {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 32px 24px;
  text-align: center;
  transition: all 0.35s ease;
}
.process-step:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.process-step .step-num {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: #fbbf24;
  font-size: 18px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.process-step .step-icon {
  font-size: 28px;
  color: #0ea5e9;
  margin-bottom: 12px;
}
.process-step h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
}
.process-step p {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 8px;
  line-height: 1.6;
}
.process-step::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -14px;
  width: 28px;
  height: 2px;
  background: linear-gradient(90deg, rgba(14, 165, 233, 0.3), rgba(14, 165, 233, 0.6));
  display: none;
}
.process-step:last-child::after {
  display: none;
}
@media (min-width: 1025px) {
  .process-step::after {
    display: block;
  }
}
@media (max-width: 1024px) {
  .process-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 640px) {
  .process-grid {
    grid-template-columns: 1fr;
  }
}
/* FAQ */
.faq-section {
  background: var(--surface);
}
.faq-list {
  max-width: 860px;
  margin: 36px auto 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s ease;
}
.faq-item:hover {
  border-color: rgba(14, 165, 233, 0.3);
  box-shadow: var(--shadow);
}
.faq-item summary {
  cursor: pointer;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  list-style: none;
  position: relative;
  transition: color 0.2s ease;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::before {
  content: '\f059';
  font-family: 'Font Awesome 6 Free';
  font-weight: 400;
  color: #0ea5e9;
  font-size: 18px;
  flex-shrink: 0;
}
.faq-item summary::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 13px;
  color: #94a3b8;
  margin-left: auto;
  transition: transform 0.3s ease;
}
.faq-item[open] summary::after {
  transform: rotate(180deg);
}
.faq-item[open] summary {
  color: #0284c7;
}
.faq-item .faq-answer {
  padding: 0 24px 20px;
  color: var(--text-light);
  font-size: 15px;
  line-height: 1.8;
  border-top: 1px solid var(--border);
  margin-top: 0;
  padding-top: 16px;
}
.faq-item[open] .faq-answer {
  animation: fadeInDown 0.3s ease both;
}
/* CTA */
.cta-section {
  background: linear-gradient(135deg, var(--deep-dark), #111c30);
  position: relative;
  overflow: hidden;
  padding-top: 80px;
  padding-bottom: 80px;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(14, 165, 233, 0.4), transparent);
}
.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}
.cta-content h2 {
  font-size: 36px;
  font-weight: 900;
  color: #fff;
  line-height: 1.3;
  letter-spacing: -0.5px;
}
.cta-content p {
  font-size: 16px;
  color: #94a3b8;
  margin-top: 16px;
  line-height: 1.7;
}
.cta-buttons {
  margin-top: 28px;
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-buttons .btn-primary {
  font-size: 16px;
  padding: 16px 36px;
}
.cta-buttons .btn-secondary {
  font-size: 16px;
  padding: 16px 36px;
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.18);
}
@media (max-width: 768px) {
  .cta-content h2 {
    font-size: 26px;
  }
}
/* Footer */
.site-footer {
  background: #080e1a;
  color: #94a3b8;
  padding-top: 60px;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.footer-brand h3 {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-brand p {
  font-size: 14px;
  color: #64748b;
  margin-top: 14px;
  line-height: 1.7;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, #0ea5e9, #38bdf8);
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: #64748b;
  padding: 6px 0;
  transition: all 0.25s ease;
}
.footer-col a:hover {
  color: #0ea5e9;
  transform: translateX(4px);
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 0 28px;
  font-size: 13px;
  color: #475569;
}
.footer-bottom .link {
  color: #64748b;
}
.footer-bottom .link:hover {
  color: #0ea5e9;
}
@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* roulang page: category1 */
:root {
      --primary: #0ea5e9;
      --primary-dark: #0284c7;
      --primary-light: #e0f2fe;
      --accent: #f59e0b;
      --bg: #f8fafc;
      --bg-white: #ffffff;
      --text-main: #0f172a;
      --text-secondary: #475569;
      --text-muted: #94a3b8;
      --border: #e2e8f0;
      --radius: 12px;
      --radius-lg: 20px;
      --shadow: 0 2px 12px rgba(15, 23, 42, 0.08);
      --shadow-hover: 0 12px 32px rgba(15, 23, 42, 0.12);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
    }

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

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

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

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      transition: box-shadow 0.3s ease;
    }

    .site-header.scrolled {
      box-shadow: 0 4px 24px rgba(2, 132, 199, 0.08);
    }

    .header-top {
      background: linear-gradient(135deg, #075985 0%, #0284c7 50%, #0ea5e9 100%);
      padding: 6px 0;
      color: rgba(255, 255, 255, 0.85);
      font-size: 13px;
    }

    .header-top-inner {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .header-top-trends {
      display: flex;
      gap: 20px;
    }

    .header-top-trends a {
      color: rgba(255, 255, 255, 0.85);
      transition: color 0.2s;
    }

    .header-top-trends a:hover {
      color: #fff;
      text-decoration: underline;
    }

    .header-main {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 68px;
      gap: 32px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 18px;
      color: var(--text-main);
      white-space: nowrap;
      flex-shrink: 0;
    }

    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, #0ea5e9, #0284c7);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 16px;
      box-shadow: 0 4px 10px rgba(2, 132, 199, 0.25);
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 4px;
      flex: 1;
    }

    .nav-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 8px 16px;
      border-radius: 10px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-secondary);
      transition: var(--transition);
      white-space: nowrap;
    }

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

    .nav-item.active {
      color: var(--primary-dark);
      background: linear-gradient(135deg, #e0f2fe, #bae6fd);
      font-weight: 600;
    }

    .nav-item i {
      font-size: 14px;
    }

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

    .header-search {
      position: relative;
    }

    .header-search input {
      width: 180px;
      padding: 8px 36px 8px 14px;
      border: 1px solid var(--border);
      border-radius: 10px;
      font-size: 14px;
      outline: none;
      transition: var(--transition);
      background: #f8fafc;
    }

    .header-search input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
      background: #fff;
      width: 220px;
    }

    .header-search i {
      position: absolute;
      right: 12px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted);
      font-size: 14px;
      pointer-events: none;
    }

    .header-cta {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 8px 20px;
      background: linear-gradient(135deg, #0ea5e9, #0284c7);
      color: #fff !important;
      border-radius: 10px;
      font-size: 14px;
      font-weight: 600;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3);
    }

    .header-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(2, 132, 199, 0.35);
    }

    .mobile-toggle {
      display: none;
      padding: 8px;
      color: var(--text-main);
      font-size: 20px;
      border-radius: 8px;
      transition: background 0.2s;
    }

    .mobile-toggle:hover {
      background: var(--primary-light);
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      right: -320px;
      width: 300px;
      height: 100vh;
      background: #fff;
      z-index: 200;
      padding: 24px;
      box-shadow: -8px 0 32px rgba(15, 23, 42, 0.15);
      transition: right 0.3s ease;
      overflow-y: auto;
    }

    .mobile-menu.open {
      right: 0;
    }

    .mobile-menu-overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(15, 23, 42, 0.5);
      z-index: 199;
      backdrop-filter: blur(4px);
    }

    .mobile-menu-overlay.show {
      display: block;
    }

    .mobile-menu-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 32px;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border);
    }

    .mobile-menu-header .logo {
      font-size: 16px;
    }

    .mobile-close {
      width: 36px;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 8px;
      background: #f1f5f9;
      color: var(--text-secondary);
      font-size: 16px;
    }

    .mobile-menu .nav-item {
      display: flex;
      width: 100%;
      padding: 14px 12px;
      font-size: 15px;
      border-radius: 10px;
      margin-bottom: 4px;
    }

    .mobile-menu .nav-item.active {
      background: var(--primary-light);
    }

    .mobile-menu-cta {
      margin-top: 16px;
      display: block;
      text-align: center;
      padding: 14px;
      background: linear-gradient(135deg, #0ea5e9, #0284c7);
      color: #fff;
      border-radius: 10px;
      font-weight: 600;
    }

    .mobile-menu-hot {
      margin-top: 24px;
    }

    .mobile-menu-hot h4 {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 12px;
      font-weight: 500;
    }

    .mobile-menu-hot a {
      display: block;
      padding: 8px 12px;
      color: var(--text-secondary);
      font-size: 13px;
      border-radius: 8px;
      transition: background 0.2s;
    }

    .mobile-menu-hot a:hover {
      background: #f8fafc;
      color: var(--primary);
    }

    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ===== Hero / Banner ===== */
    .category-hero {
      position: relative;
      padding: 80px 0 100px;
      background: linear-gradient(135deg, #0f172a 0%, #075985 55%, #0284c7 100%);
      color: #fff;
      overflow: hidden;
    }

    .category-hero::before {
      content: '';
      position: absolute;
      top: -30%;
      right: -10%;
      width: 600px;
      height: 600px;
      background: linear-gradient(135deg, rgba(14, 165, 233, 0.3), rgba(245, 158, 11, 0.15));
      border-radius: 50%;
      filter: blur(100px);
      pointer-events: none;
    }

    .category-hero::after {
      content: '';
      position: absolute;
      bottom: -50%;
      left: -5%;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(14, 165, 233, 0.25), transparent 70%);
      border-radius: 50%;
      filter: blur(80px);
      pointer-events: none;
    }

    .category-hero .hero-bg-img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.08;
    }

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

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 100px;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.9);
      margin-bottom: 20px;
      backdrop-filter: blur(8px);
    }

    .category-hero h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }

    .category-hero p.hero-desc {
      font-size: 17px;
      color: rgba(255, 255, 255, 0.8);
      max-width: 680px;
      margin-bottom: 36px;
      line-height: 1.8;
    }

    .hero-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 12px 28px;
      background: linear-gradient(135deg, #f59e0b, #d97706);
      color: #fff;
      border-radius: 10px;
      font-weight: 600;
      font-size: 15px;
      transition: var(--transition);
      box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 28px rgba(245, 158, 11, 0.4);
    }

    .btn-ghost {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 12px 28px;
      background: rgba(255, 255, 255, 0.1);
      color: #e0f2fe;
      border: 1px solid rgba(255, 255, 255, 0.3);
      border-radius: 10px;
      font-weight: 500;
      font-size: 14px;
      transition: var(--transition);
    }

    .btn-ghost:hover {
      background: rgba(255, 255, 255, 0.2);
      border-color: rgba(255, 255, 255, 0.5);
      transform: translateY(-2px);
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 56px;
      padding: 24px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 16px;
      backdrop-filter: blur(12px);
    }

    .hero-stat-item {
      text-align: center;
    }

    .hero-stat-num {
      font-size: 28px;
      font-weight: 800;
      color: #fbbf24;
      line-height: 1.2;
    }

    .hero-stat-label {
      font-size: 13px;
      color: rgba(255, 255, 255, 0.7);
      margin-top: 4px;
    }

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

    .section-alt {
      background: #fff;
    }

    .section-header {
      margin-bottom: 48px;
      max-width: 640px;
    }

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

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 14px;
      background: var(--primary-light);
      color: var(--primary-dark);
      border-radius: 100px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 12px;
    }

    .section-header h2 {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.3;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.01em;
    }

    .section-header p {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    .divider-bar {
      width: 48px;
      height: 3px;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      border-radius: 100px;
      margin: 16px 0 0;
    }

    .center .divider-bar {
      margin-left: auto;
      margin-right: auto;
    }

    /* ===== Feature Cards ===== */
    .guide-card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .guide-card {
      background: #fff;
      border-radius: 16px;
      border: 1px solid var(--border);
      overflow: hidden;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

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

    .guide-card-image {
      position: relative;
      height: 190px;
      overflow: hidden;
    }

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

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

    .guide-card-image .card-tag {
      position: absolute;
      top: 14px;
      left: 14px;
      padding: 4px 12px;
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(8px);
      border-radius: 100px;
      font-size: 12px;
      font-weight: 600;
      color: var(--primary-dark);
      box-shadow: 0 2px 8px rgba(15, 23, 42, 0.15);
    }

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

    .guide-card-body h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }

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

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

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

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

    /* ===== Steps ===== */
    .login-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      counter-reset: step;
    }

    .step-item {
      position: relative;
      background: #fff;
      border-radius: 16px;
      padding: 32px 24px;
      border: 1px solid var(--border);
      transition: var(--transition);
    }

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

    .step-item::before {
      counter-increment: step;
      content: counter(step);
      position: absolute;
      top: 20px;
      right: 20px;
      font-size: 42px;
      font-weight: 800;
      color: rgba(14, 165, 233, 0.08);
      line-height: 1;
      font-family: 'Arial Black', sans-serif;
    }

    .step-icon {
      width: 52px;
      height: 52px;
      background: linear-gradient(135deg, var(--primary-light), #dbeafe);
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-dark);
      font-size: 20px;
      margin-bottom: 18px;
    }

    .step-item h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .step-item p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* ===== Content List ===== */
    .article-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .article-row {
      display: flex;
      gap: 16px;
      padding: 16px;
      background: #fff;
      border-radius: 14px;
      border: 1px solid var(--border);
      transition: var(--transition);
      align-items: flex-start;
    }

    .article-row:hover {
      box-shadow: var(--shadow-hover);
      border-color: transparent;
      transform: translateX(4px);
    }

    .article-row-icon {
      width: 44px;
      height: 44px;
      background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 16px;
      flex-shrink: 0;
    }

    .article-row-content {
      flex: 1;
    }

    .article-row-content h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 4px;
      line-height: 1.5;
    }

    .article-row-content p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .article-row-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 8px;
    }

    .article-row-meta span {
      font-size: 12px;
      color: var(--text-muted);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* ===== Stats Panel ===== */
    .stats-panel {
      background: linear-gradient(135deg, #0f172a, #075985);
      border-radius: 24px;
      padding: 48px;
      color: #fff;
      position: relative;
      overflow: hidden;
    }

    .stats-panel::before {
      content: '';
      position: absolute;
      top: -100px;
      right: -100px;
      width: 300px;
      height: 300px;
      background: rgba(14, 165, 233, 0.2);
      border-radius: 50%;
      filter: blur(60px);
    }

    .stats-panel::after {
      content: '';
      position: absolute;
      bottom: -80px;
      left: 20%;
      width: 200px;
      height: 200px;
      background: rgba(245, 158, 11, 0.15);
      border-radius: 50%;
      filter: blur(50px);
    }

    .stats-panel .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      position: relative;
      z-index: 2;
    }

    .stats-panel .stats-grid h3 {
      font-size: 36px;
      font-weight: 800;
      color: #fbbf24;
      line-height: 1.2;
    }

    .stats-panel .stats-grid p {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.7);
      margin-top: 4px;
    }

    .stats-panel .stats-head {
      font-size: 26px;
      font-weight: 800;
      margin-bottom: 40px;
      position: relative;
      z-index: 2;
    }

    /* ===== FAQ ===== */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      margin-bottom: 12px;
      border: 1px solid var(--border);
      border-radius: 14px;
      overflow: hidden;
      background: #fff;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: #bae6fd;
    }

    .faq-item summary {
      padding: 20px 24px;
      cursor: pointer;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      list-style: none;
      transition: background 0.2s;
    }

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

    .faq-item summary::after {
      content: '\f078';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      font-size: 14px;
      color: var(--text-muted);
      transition: transform 0.3s;
      flex-shrink: 0;
    }

    .faq-item[open] summary::after {
      transform: rotate(180deg);
      color: var(--primary);
    }

    .faq-item[open] summary {
      background: #f8fafc;
    }

    .faq-answer {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.8;
      border-top: 1px solid #f1f5f9;
      margin: 0 24px;
      padding-left: 0;
      padding-right: 0;
    }

    .faq-answer p {
      margin-top: 12px;
    }

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

    .cta-card {
      background: linear-gradient(135deg, #0ea5e9, #0284c7, #075985);
      border-radius: 24px;
      padding: 60px 48px;
      color: #fff;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .cta-card::before {
      content: '';
      position: absolute;
      top: -60%;
      right: -20%;
      width: 400px;
      height: 400px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 50%;
    }

    .cta-card::after {
      content: '';
      position: absolute;
      bottom: -40%;
      left: -10%;
      width: 300px;
      height: 300px;
      background: rgba(245, 158, 11, 0.15);
      border-radius: 50%;
    }

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

    .cta-content h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.3;
    }

    .cta-content p {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.85);
      max-width: 520px;
      margin: 0 auto 32px;
      line-height: 1.8;
    }

    .btn-white {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 14px 36px;
      background: #fff;
      color: #0284c7;
      border-radius: 12px;
      font-weight: 700;
      font-size: 16px;
      transition: var(--transition);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    }

    .btn-white:hover {
      transform: translateY(-2px) scale(1.02);
      box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
    }

    /* ===== Footer ===== */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 64px 0 32px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 40px;
    }

    .footer-brand h3 {
      font-size: 18px;
      font-weight: 700;
      color: #f1f5f9;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
    }

    .footer-brand p {
      font-size: 14px;
      line-height: 1.8;
      color: #94a3b8;
      max-width: 360px;
    }

    .footer-col h4 {
      font-size: 14px;
      font-weight: 600;
      color: #e2e8f0;
      margin-bottom: 16px;
    }

    .footer-col a {
      display: block;
      padding: 5px 0;
      font-size: 14px;
      color: #94a3b8;
      transition: color 0.2s, padding-left 0.2s;
    }

    .footer-col a:hover {
      color: #38bdf8;
      padding-left: 4px;
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 24px;
      border-top: 1px solid rgba(148, 163, 184, 0.15);
      font-size: 13px;
      color: #64748b;
    }

    .footer-bottom span:first-child {
      font-weight: 500;
    }

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

      .main-nav .nav-item {
        padding: 8px 10px;
        font-size: 13px;
      }

      .nav-item i {
        display: none;
      }

      .header-search input {
        width: 120px;
      }

      .header-search input:focus {
        width: 160px;
      }

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

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

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

      .main-nav,
      .header-search,
      .header-cta {
        display: none;
      }

      .mobile-toggle {
        display: flex;
      }

      .mobile-menu {
        display: block;
      }

      .header-top-trends span {
        display: none;
      }

      .header-top-inner {
        justify-content: center;
      }

      .category-hero {
        padding: 60px 0 80px;
      }

      .category-hero h1 {
        font-size: 30px;
      }

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

      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
        padding: 20px;
      }

      .section {
        padding: 56px 0;
      }

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

      .guide-card-grid {
        grid-template-columns: 1fr;
      }

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

      .article-list {
        grid-template-columns: 1fr;
      }

      .stats-panel {
        padding: 32px 24px;
      }

      .stats-panel .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }

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

      .cta-content h2 {
        font-size: 24px;
      }

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

      .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
      }
    }

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

      .header-main {
        padding: 0 16px;
      }

      .logo {
        font-size: 15px;
        gap: 6px;
      }

      .logo-icon {
        width: 30px;
        height: 30px;
        font-size: 14px;
      }

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

      .category-hero p.hero-desc {
        font-size: 14px;
      }

      .btn-primary,
      .btn-ghost {
        width: 100%;
        justify-content: center;
        padding: 12px 20px;
      }

      .hero-stats {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
        margin-top: 32px;
      }

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

      .stats-panel .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
      }

      .stats-panel .stats-grid h3 {
        font-size: 28px;
      }

      .footer-bottom {
        font-size: 12px;
      }
    }

    @media (min-width: 769px) {
      .mobile-menu,
      .mobile-menu-overlay {
        display: none !important;
      }
    }

/* roulang page: article */
:root {
  --primary: #0ea5e9;
  --primary-dark: #0284c7;
  --accent: #f59e0b;
  --dark: #0f172a;
  --text: #1e293b;
  --text-muted: #64748b;
  --bg: #f8fafc;
  --border: #e2e8f0;
  --radius: 16px;
  --shadow-sm: 0 2px 8px rgba(15,23,42,0.06);
  --shadow: 0 10px 30px rgba(15,23,42,0.08);
  --shadow-lg: 0 20px 50px rgba(15,23,42,0.12);
}
* { 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",sans-serif; background: var(--bg); color: var(--text); line-height: 1.7; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
button { cursor: pointer; border: none; background: none; }

.container-custom { width: 100%; max-width: 1280px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }

.top-bar { background: var(--dark); color: rgba(255,255,255,0.85); font-size: 13px; padding: 6px 0; }
.top-bar .container-custom { display: flex; justify-content: space-between; align-items: center; }
.top-bar .hot-line i { color: var(--accent); margin-right: 6px; }
.top-bar .status-tag { display: inline-flex; align-items: center; gap: 6px; background: rgba(16,185,129,0.15); color: #34d399; padding: 2px 12px; border-radius: 20px; font-weight: 500; font-size: 12px; }
.top-bar .status-tag .dot { width: 6px; height: 6px; background: #34d399; border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% {opacity:1;} 50% {opacity:0.4;} }

.site-header { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 20px rgba(15,23,42,0.04); }
.header-main { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; gap: 20px; }
.logo-text { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: var(--dark); letter-spacing: -0.5px; }
.logo-text i { color: var(--primary); font-size: 24px; background: linear-gradient(135deg,#0ea5e9,#0284c7); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.search-area { display: flex; align-items: center; background: #f1f5f9; border-radius: 50px; padding: 4px 4px 4px 16px; border: 1px solid transparent; transition: all 0.3s ease; width: 260px; }
.search-area:focus-within { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 4px rgba(14,165,233,0.1); }
.search-area input { border: none; background: transparent; outline: none; font-size: 14px; flex: 1; color: var(--text); }
.search-area button { background: var(--primary); color: #fff; width: 34px; height: 34px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 14px; transition: background 0.3s; }
.search-area button:hover { background: var(--primary-dark); }

.main-nav { background: #fff; border-top: 1px solid #f1f5f9; }
.main-nav .nav-inner { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; padding: 8px 24px; }
.nav-item { display: inline-flex; align-items: center; gap: 8px; padding: 8px 18px; font-size: 15px; font-weight: 500; color: var(--text); border-radius: 50px; transition: all 0.3s ease; white-space: nowrap; }
.nav-item i { font-size: 14px; color: var(--text-muted); transition: color 0.3s; }
.nav-item:hover { background: #f0f9ff; color: var(--primary-dark); }
.nav-item:hover i { color: var(--primary); }
.nav-item.active { background: linear-gradient(135deg,#0ea5e9,#0284c7); color: #fff; box-shadow: 0 4px 14px rgba(14,165,233,0.3); }
.nav-item.active i { color: #fff; }
.nav-mobile-toggle { display: none; margin-left: auto; background: var(--primary); color: #fff; border-radius: 8px; padding: 8px 14px; font-size: 18px; }

.page-hero { position: relative; background-image: url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center; padding: 80px 0 70px; }
.page-hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(115deg,rgba(15,23,42,0.88) 0%,rgba(15,23,42,0.72) 40%,rgba(14,165,233,0.35) 100%); }
.page-hero .container-custom { position: relative; z-index: 2; }
.page-hero .hero-tag { display: inline-flex; align-items: center; gap: 8px; background: rgba(14,165,233,0.18); border: 1px solid rgba(14,165,233,0.35); color: #7dd3fc; padding: 6px 18px; border-radius: 50px; font-size: 13px; font-weight: 500; margin-bottom: 18px; }
.page-hero h1 { color: #fff; font-size: 36px; font-weight: 800; line-height: 1.3; letter-spacing: -0.5px; margin-bottom: 10px; }
.page-hero p { color: rgba(255,255,255,0.75); font-size: 16px; max-width: 620px; }

.breadcrumb-wrap { background: #fff; border-bottom: 1px solid var(--border); padding: 12px 0; }
.breadcrumb-wrap .breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 14px; color: var(--text-muted); }
.breadcrumb-wrap .breadcrumb a { display: inline-flex; align-items: center; gap: 4px; color: var(--text-muted); }
.breadcrumb-wrap .breadcrumb a:hover { color: var(--primary); }
.breadcrumb-wrap .breadcrumb .separator { color: #cbd5e1; }
.breadcrumb-wrap .breadcrumb .current { color: var(--primary); font-weight: 500; }

.article-section { padding: 56px 0; }
.article-layout { max-width: 900px; margin: 0 auto; }
.article-main { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 48px 56px; border: 1px solid #f1f5f9; }
.article-tag { display: inline-flex; align-items: center; gap: 6px; background: #f0f9ff; color: var(--primary-dark); font-size: 13px; font-weight: 600; padding: 5px 16px; border-radius: 30px; margin-bottom: 18px; }
.article-title { font-size: 32px; font-weight: 800; line-height: 1.35; color: var(--dark); letter-spacing: -0.5px; margin-bottom: 16px; }
.article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; padding-bottom: 24px; border-bottom: 1px solid #f1f5f9; margin-bottom: 28px; color: var(--text-muted); font-size: 14px; }
.article-meta span { display: inline-flex; align-items: center; gap: 7px; }
.article-meta i { color: var(--primary); }

.article-content { font-size: 16px; line-height: 1.9; color: var(--text); }
.article-content h2 { font-size: 24px; font-weight: 700; color: var(--dark); margin: 40px 0 16px; padding-left: 14px; border-left: 4px solid var(--primary); }
.article-content h3 { font-size: 20px; font-weight: 600; color: var(--dark); margin: 32px 0 12px; }
.article-content p { margin-bottom: 18px; }
.article-content ul, .article-content ol { margin: 18px 0; padding-left: 26px; }
.article-content li { margin-bottom: 8px; position: relative; }
.article-content ul li::before { content: '•'; color: var(--primary); font-weight: bold; position: absolute; left: -16px; }
.article-content blockquote { border-left: 4px solid var(--primary); background: #f0f9ff; padding: 16px 20px; border-radius: 0 12px 12px 0; margin: 24px 0; color: var(--text); font-style: italic; }
.article-content img { border-radius: 12px; margin: 24px 0; box-shadow: var(--shadow-sm); }
.article-content a { color: var(--primary-dark); border-bottom: 1px solid rgba(14,165,233,0.3); }
.article-content a:hover { color: var(--primary); border-bottom-color: var(--primary); }
.article-content table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14px; }
.article-content table th, .article-content table td { border: 1px solid var(--border); padding: 12px 16px; text-align: left; }
.article-content table th { background: #f8fafc; font-weight: 600; }

.article-tags { margin-top: 32px; padding-top: 24px; border-top: 1px solid #f1f5f9; display: flex; flex-wrap: wrap; gap: 10px; }
.article-tags .tag { display: inline-flex; align-items: center; gap: 6px; background: #f8fafc; color: var(--text-muted); font-size: 13px; padding: 5px 14px; border-radius: 20px; border: 1px solid var(--border); transition: all 0.3s ease; }
.article-tags .tag:hover { background: #f0f9ff; color: var(--primary-dark); border-color: rgba(14,165,233,0.3); }

.not-found-box { text-align: center; padding: 60px 20px; }
.not-found-box i { font-size: 56px; color: #cbd5e1; margin-bottom: 20px; }
.not-found-box h1 { font-size: 28px; color: var(--dark); margin-bottom: 12px; }
.not-found-box p { color: var(--text-muted); margin-bottom: 28px; }

.btn-primary { display: inline-flex; align-items: center; gap: 10px; background: linear-gradient(135deg,#0ea5e9,#0284c7); color: #fff; padding: 12px 28px; border-radius: 50px; font-size: 15px; font-weight: 600; box-shadow: 0 4px 16px rgba(14,165,233,0.3); transition: all 0.3s ease; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(14,165,233,0.4); }
.btn-outline { display: inline-flex; align-items: center; gap: 8px; border: 2px solid rgba(255,255,255,0.4); color: #fff; padding: 10px 24px; border-radius: 50px; font-size: 14px; font-weight: 500; transition: all 0.3s ease; }
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); }

.related-section { padding: 64px 0; background: #f8fafc; }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head .section-label { display: inline-flex; align-items: center; gap: 6px; color: var(--primary-dark); font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 8px; }
.section-head h2 { font-size: 32px; font-weight: 800; color: var(--dark); margin-bottom: 10px; letter-spacing: -0.5px; }
.section-head p { color: var(--text-muted); font-size: 15px; }
.related-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.related-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid #f1f5f9; transition: all 0.35s ease; display: flex; flex-direction: column; }
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(14,165,233,0.2); }
.related-thumb { width: 100%; height: 180px; overflow: hidden; position: relative; }
.related-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.related-card:hover .related-thumb img { transform: scale(1.05); }
.related-thumb::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg,transparent 55%,rgba(15,23,42,0.2)); }
.related-body { padding: 22px 24px; flex: 1; display: flex; flex-direction: column; }
.related-body h3 { font-size: 16px; font-weight: 600; color: var(--dark); line-height: 1.5; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-body p { font-size: 14px; color: var(--text-muted); line-height: 1.6; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-cat { display: inline-flex; align-items: center; gap: 6px; background: #f0f9ff; color: var(--primary-dark); font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 20px; width: fit-content; margin-top: auto; }

.faq-section { padding: 72px 0; background: #fff; }
.faq-grid { max-width: 860px; margin: 0 auto; display: grid; gap: 16px; }
.faq-item { background: #f8fafc; border: 1px solid var(--border); border-radius: 14px; padding: 24px 28px; transition: all 0.3s ease; }
.faq-item:hover { border-color: rgba(14,165,233,0.3); box-shadow: var(--shadow-sm); }
.faq-item h3 { display: flex; align-items: flex-start; gap: 12px; font-size: 16px; font-weight: 600; color: var(--dark); margin-bottom: 8px; }
.faq-item h3 i { color: var(--primary); font-size: 16px; margin-top: 4px; flex-shrink: 0; }
.faq-item p { font-size: 14px; color: var(--text-muted); padding-left: 28px; line-height: 1.7; }

.cta-section { position: relative; padding: 80px 0; background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; text-align: center; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: rgba(15,23,42,0.88); }
.cta-section .container-custom { position: relative; z-index: 2; }
.cta-section h2 { color: #fff; font-size: 34px; font-weight: 800; margin-bottom: 14px; letter-spacing: -0.5px; }
.cta-section p { color: rgba(255,255,255,0.75); font-size: 16px; max-width: 560px; margin: 0 auto 36px; line-height: 1.8; }
.cta-buttons { display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; }
.cta-strong { display: inline-flex; align-items: center; gap: 10px; background: linear-gradient(135deg,#f59e0b,#d97706); color: #fff; padding: 14px 36px; border-radius: 50px; font-size: 16px; font-weight: 700; box-shadow: 0 8px 30px rgba(245,158,11,0.3); transition: all 0.35s ease; }
.cta-strong:hover { transform: translateY(-2px) scale(1.02); box-shadow: 0 12px 36px rgba(245,158,11,0.45); }
.cta-metrics { display: flex; justify-content: center; gap: 60px; margin-top: 56px; flex-wrap: wrap; }
.cta-metric { text-align: center; }
.cta-metric .value { font-size: 42px; font-weight: 800; color: #fff; line-height: 1; }
.cta-metric .value span { color: var(--accent); }
.cta-metric .label { font-size: 13px; color: rgba(255,255,255,0.6); margin-top: 8px; }

.site-footer { background: var(--dark); color: rgba(255,255,255,0.75); padding: 64px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand h3 { display: flex; align-items: center; color: #fff; font-size: 20px; font-weight: 700; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.6); max-width: 420px; }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 20px; }
.footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 14px; padding: 6px 0; transition: all 0.3s; }
.footer-col a:hover { color: #fff; padding-left: 8px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 24px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 13px; color: rgba(255,255,255,0.4); }

.article-nav-prevnext { display: flex; justify-content: space-between; gap: 16px; margin-top: 36px; }
.article-nav-link { flex: 1; background: #f8fafc; border: 1px solid var(--border); border-radius: 12px; padding: 16px 20px; transition: all 0.3s ease; font-size: 14px; }
.article-nav-link:hover { background: #f0f9ff; border-color: rgba(14,165,233,0.3); }
.article-nav-link .nav-label { display: flex; align-items: center; gap: 6px; color: var(--text-muted); font-size: 12px; margin-bottom: 6px; }
.article-nav-link .nav-title { color: var(--dark); font-weight: 600; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }

@media (max-width: 1024px) {
  .header-main { flex-wrap: wrap; }
  .search-area { width: 100%; order: 3; }
  .related-grid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .page-hero { padding: 56px 0 48px; }
  .page-hero h1 { font-size: 28px; }
  .article-main { padding: 32px 24px; }
  .article-title { font-size: 24px; }
  .related-grid { grid-template-columns: 1fr; }
  .cta-metrics { gap: 32px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .nav-mobile-toggle { display: flex; }
  .main-nav .nav-inner { display: none; flex-direction: column; align-items: stretch; gap: 4px; padding: 12px; }
  .main-nav .nav-inner.open { display: flex; }
  .nav-item { padding: 12px 16px; border-radius: 8px; justify-content: flex-start; }
  .nav-item.active { background: linear-gradient(135deg,#0ea5e9,#0284c7); }
  .breadcrumb-wrap .breadcrumb { font-size: 12px; }
  .cta-section { padding: 56px 0; }
  .cta-section h2 { font-size: 26px; }
  .article-section { padding: 32px 0; }
  .related-section { padding: 48px 0; }
  .faq-section { padding: 48px 0; }
}
@media (max-width: 520px) {
  .container-custom { padding-left: 16px; padding-right: 16px; }
  .header-main { padding: 14px 16px; flex-direction: column; align-items: stretch; gap: 10px; }
  .search-area { width: 100%; }
  .logo-text { font-size: 17px; }
  .page-hero { padding: 48px 0 40px; }
  .page-hero h1 { font-size: 24px; }
  .article-main { padding: 24px 18px; }
  .article-title { font-size: 20px; }
  .article-content { font-size: 15px; }
  .related-grid { grid-template-columns: 1fr; }
  .cta-metrics { gap: 24px; flex-direction: column; align-items: center; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .article-nav-prevnext { flex-direction: column; }
}

/* roulang page: category2 */
:root {
      --brand: #0ea5e9;
      --brand-dark: #0369a1;
      --brand-light: #38bdf8;
      --ink: #0f172a;
      --ink-soft: #475569;
      --ink-faint: #94a3b8;
      --paper: #f8fafc;
      --border: #e2e8f0;
      --radius: 16px;
      --shadow: 0 4px 24px rgba(2, 12, 27, 0.08);
      --shadow-lift: 0 12px 40px rgba(2, 12, 27, 0.14);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
      color: var(--ink);
      background: #fff;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    img {
      max-width: 100%;
      display: block;
    }
    button, input {
      font-family: inherit;
      font-size: inherit;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border);
    }
    .header-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 24px;
    }
    .logo-text {
      font-size: 1.35rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      background: linear-gradient(135deg, #0284c7, #2563eb);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      white-space: nowrap;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 4px;
      flex-wrap: nowrap;
      overflow-x: auto;
      scrollbar-width: none;
    }
    .main-nav::-webkit-scrollbar {
      display: none;
    }
    .nav-item {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 16px;
      border-radius: 999px;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--ink-soft);
      white-space: nowrap;
      transition: all 0.25s ease;
    }
    .nav-item i {
      font-size: 0.85rem;
      color: var(--ink-faint);
      transition: color 0.25s;
    }
    .nav-item:hover {
      background: #f0f9ff;
      color: var(--brand-dark);
    }
    .nav-item:hover i,
    .nav-item.active i {
      color: var(--brand);
    }
    .nav-item.active {
      background: linear-gradient(135deg, #e0f2fe, #f0f9ff);
      color: var(--brand-dark);
      font-weight: 700;
      box-shadow: inset 0 0 0 1px rgba(14, 165, 233, 0.2);
    }
    .page-hero {
      position: relative;
      padding: 90px 0 70px;
      background: linear-gradient(120deg, #082f49 0%, #0c4a6e 55%, #075985 100%);
      overflow: hidden;
    }
    .page-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      opacity: 0.18;
    }
    .page-hero::after {
      content: '';
      position: absolute;
      top: -60%;
      right: -20%;
      width: 600px;
      height: 600px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(56, 189, 248, 0.25), transparent 70%);
      pointer-events: none;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #e0f2fe;
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 600;
      backdrop-filter: blur(4px);
    }
    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 13px 30px;
      border-radius: 999px;
      font-weight: 700;
      font-size: 0.98rem;
      color: #fff;
      background: linear-gradient(135deg, #0ea5e9, #2563eb);
      box-shadow: 0 8px 24px rgba(14, 165, 233, 0.35);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 40px rgba(14, 165, 233, 0.45);
      background: linear-gradient(135deg, #0284c7, #1d4ed8);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 13px 30px;
      border-radius: 999px;
      font-weight: 700;
      font-size: 0.98rem;
      color: #fff;
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.25);
      backdrop-filter: blur(8px);
      transition: all 0.3s ease;
    }
    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.22);
      transform: translateY(-2px);
    }
    .section-title {
      font-size: clamp(1.8rem, 4vw, 2.5rem);
      font-weight: 800;
      line-height: 1.3;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
    }
    .section-subtitle {
      font-size: 1.06rem;
      color: var(--ink-soft);
      max-width: 640px;
      line-height: 1.7;
    }
    .feature-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px;
      transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
      overflow: hidden;
    }
    .feature-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--brand-light), var(--brand));
      opacity: 0;
      transition: opacity 0.3s;
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lift);
      border-color: rgba(14, 165, 233, 0.3);
    }
    .feature-card:hover::before {
      opacity: 1;
    }
    .feature-icon {
      width: 54px;
      height: 54px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      margin-bottom: 18px;
    }
    .guide-item {
      display: flex;
      gap: 18px;
      padding: 24px 0;
      border-bottom: 1px solid var(--border);
      transition: background 0.2s;
    }
    .guide-item:last-child {
      border-bottom: none;
    }
    .guide-num {
      flex-shrink: 0;
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: #f0f9ff;
      color: var(--brand-dark);
      font-weight: 800;
      font-size: 1.1rem;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .stats-section {
      background: #082f49;
      border-radius: 24px;
      padding: 60px 56px;
      position: relative;
      overflow: hidden;
    }
    .stats-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-3.png');
      background-size: cover;
      background-position: center;
      opacity: 0.12;
    }
    .stat-item {
      position: relative;
      z-index: 1;
      text-align: center;
      padding: 24px 12px;
    }
    .stat-value {
      font-size: clamp(2rem, 5vw, 3rem);
      font-weight: 800;
      background: linear-gradient(135deg, #7dd3fc, #38bdf8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1.2;
    }
    .risk-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 24px;
      transition: all 0.3s ease;
      border-left: 4px solid #f59e0b;
    }
    .risk-card:hover {
      box-shadow: var(--shadow);
      transform: translateY(-3px);
    }
    .faq-item {
      border: 1px solid var(--border);
      border-radius: 16px;
      background: #fff;
      transition: all 0.3s ease;
    }
    .faq-item:hover {
      box-shadow: var(--shadow);
      border-color: rgba(14, 165, 233, 0.2);
    }
    .faq-question {
      padding: 20px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 700;
      font-size: 1.02rem;
      cursor: pointer;
      gap: 16px;
    }
    .faq-question::after {
      content: '+';
      font-size: 1.5rem;
      color: var(--brand);
      font-weight: 400;
      flex-shrink: 0;
      transition: transform 0.3s;
    }
    details[open] .faq-question::after {
      transform: rotate(45deg);
    }
    .faq-answer {
      padding: 0 24px 20px;
      color: var(--ink-soft);
      font-size: 0.96rem;
    }
    .cta-section {
      background: linear-gradient(135deg, #0c4a6e, #075985, #0e7490);
      border-radius: 24px;
      padding: 56px 60px;
      position: relative;
      overflow: hidden;
    }
    .cta-section::before {
      content: '';
      position: absolute;
      top: 50%;
      right: -80px;
      transform: translateY(-50%);
      width: 300px;
      height: 300px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(56, 189, 248, 0.3), transparent 70%);
    }
    .site-footer {
      background: #0b1120;
      color: #94a3b8;
      padding: 60px 0 30px;
      margin-top: 80px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 40px;
    }
    .footer-brand h3 {
      color: #fff;
      font-size: 1.3rem;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .footer-brand p {
      font-size: 0.92rem;
      line-height: 1.8;
      max-width: 380px;
    }
    .footer-col h4 {
      color: #e2e8f0;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-col a {
      display: block;
      padding: 6px 0;
      font-size: 0.92rem;
      transition: color 0.25s, padding-left 0.25s;
    }
    .footer-col a:hover {
      color: #38bdf8;
      padding-left: 6px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.85rem;
    }
    @media (max-width: 1024px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .footer-brand {
        grid-column: 1 / -1;
      }
    }
    @media (max-width: 768px) {
      .header-top {
        flex-wrap: wrap;
        height: auto;
        padding: 12px 0;
        gap: 12px;
      }
      .logo-text {
        font-size: 1.15rem;
      }
      .main-nav {
        order: 3;
        width: 100%;
        padding-bottom: 8px;
        gap: 8px;
      }
      .nav-item {
        padding: 6px 12px;
        font-size: 0.82rem;
      }
      .page-hero {
        padding: 60px 0 50px;
      }
      .stats-section {
        padding: 40px 24px;
        border-radius: 20px;
      }
      .cta-section {
        padding: 40px 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
    }
    @media (max-width: 520px) {
      .container-custom {
        padding: 0 16px;
      }
      .header-top {
        height: auto;
      }
      .nav-item {
        padding: 5px 10px;
        font-size: 0.78rem;
      }
      .nav-item i {
        display: none;
      }
      .page-hero {
        padding: 48px 0 40px;
      }
      .section-title {
        font-size: 1.5rem;
      }
      .stats-section {
        grid-template-columns: 1fr 1fr !important;
        padding: 32px 16px;
      }
      .cta-section {
        padding: 32px 20px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }
    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.88rem;
      color: #94a3b8;
    }
    .breadcrumb a {
      color: #e0f2fe;
    }
    .breadcrumb a:hover {
      color: #7dd3fc;
    }
    main {
      min-height: 60vh;
    }

/* roulang page: category3 */
:root {
      --primary: #0f2b46;
      --secondary: #eab308;
      --accent: #06b6d4;
      --night: #081422;
      --bg-light: #f4f7fa;
      --card-radius: 1rem;
      --shadow-sm: 0 2px 12px rgba(0,0,0,0.06);
      --shadow-md: 0 8px 30px rgba(0,0,0,0.10);
      --shadow-lg: 0 20px 60px rgba(0,0,0,0.15);
    }
    html { scroll-behavior: smooth; }
    body { 
      font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; 
      background: var(--bg-light);
      color: #1e293b;
      line-height: 1.7;
    }
    .container-custom { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

    /* 导航 */
    .main-nav-wrap {
      position: sticky; top: 0; z-index: 100;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(15,43,70,0.08);
      box-shadow: 0 2px 20px rgba(15,43,70,0.05);
    }
    .main-nav { display: flex; align-items: center; gap: 0.25rem; max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; height: 68px; }
    .brand-logo { display: flex; align-items: center; font-weight: 800; font-size: 1.2rem; color: var(--primary); white-space: nowrap; }
    .brand-logo i { color: var(--secondary); margin-right: 0.5rem; font-size: 1.4rem; }
    .nav-links { display: flex; align-items: center; gap: 0.15rem; margin-left: 2.5rem; flex: 1; }
    .nav-item {
      display: inline-flex; align-items: center; gap: 0.4rem;
      padding: 0.55rem 1.1rem; border-radius: 999px;
      font-size: 0.9rem; font-weight: 500; color: #475569;
      text-decoration: none; transition: all 0.3s ease;
      white-space: nowrap;
    }
    .nav-item:hover { background: rgba(234,179,8,0.1); color: var(--primary); transform: translateY(-1px); }
    .nav-item.active { background: var(--primary); color: #fff; box-shadow: 0 4px 16px rgba(15,43,70,0.25); }
    .nav-item.active i { color: var(--secondary); }
    .nav-search { margin-left: auto; display: flex; align-items: center; }
    .nav-search input {
      border: 1.5px solid rgba(15,43,70,0.12); border-radius: 999px;
      padding: 0.4rem 0.9rem; font-size: 0.85rem; width: 170px;
      transition: all 0.3s; background: #f8fafc;
    }
    .nav-search input:focus { outline: none; border-color: var(--secondary); width: 220px; box-shadow: 0 0 0 3px rgba(234,179,8,0.15); }
    .hamburger { display: none; margin-left: 0.75rem; padding: 0.5rem 0.75rem; border-radius: 0.5rem; border: 1px solid rgba(15,43,70,0.15); background: white; cursor: pointer; }

    /* 页面横幅 */
    .page-banner {
      position: relative; padding: 5rem 0 4.5rem;
      background-image: url('/assets/images/backpic/back-2.png');
      background-size: cover; background-position: center;
      background-attachment: fixed;
    }
    .page-banner-overlay {
      position: absolute; inset: 0;
      background: linear-gradient(105deg, rgba(8,20,34,0.93) 20%, rgba(8,20,34,0.7) 60%, rgba(8,20,34,0.4) 100%);
    }
    .page-banner .container-custom { position: relative; z-index: 2; }
    .banner-badge {
      display: inline-flex; align-items: center; gap: 0.4rem;
      background: rgba(234,179,8,0.15); border: 1px solid rgba(234,179,8,0.4);
      color: var(--secondary); font-size: 0.82rem; font-weight: 600;
      padding: 0.35rem 1rem; border-radius: 999px; margin-bottom: 1.2rem;
      backdrop-filter: blur(8px);
    }
    .banner-title { font-size: 2.6rem; line-height: 1.25; font-weight: 800; color: #fff; margin-bottom: 1rem; }
    .banner-subtitle { font-size: 1.05rem; color: rgba(255,255,255,0.75); max-width: 720px; line-height: 1.8; }

    /* 卡片 */
    .card { background: white; border-radius: var(--card-radius); box-shadow: var(--shadow-sm); transition: all 0.3s ease; border: 1px solid rgba(0,0,0,0.04); }
    .card-hover:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(234,179,8,0.2); }

    .section-title { font-size: 2rem; font-weight: 800; color: var(--primary); line-height: 1.3; }
    .section-title-light { font-size: 2rem; font-weight: 800; color: #fff; line-height: 1.3; }
    .section-subtitle { color: #64748b; max-width: 560px; line-height: 1.7; }

    /* 数据统计 */
    .stat-card { text-align: center; padding: 1.75rem 1rem; border-radius: 1rem; }
    .stat-num { font-size: 2.4rem; font-weight: 800; color: var(--secondary); line-height: 1.2; }
    .stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.7); margin-top: 0.3rem; }

    /* 步骤条 */
    .step-item { position: relative; padding-left: 3.5rem; }
    .step-number {
      position: absolute; left: 0; top: 0;
      width: 2.4rem; height: 2.4rem; border-radius: 50%;
      background: var(--secondary); color: var(--primary);
      font-weight: 800; font-size: 1.1rem;
      display: flex; align-items: center; justify-content: center;
      box-shadow: 0 4px 12px rgba(234,179,8,0.35);
    }

    /* FAQ 手风琴 */
    .faq-item { border: 1px solid rgba(15,43,70,0.08); border-radius: 0.8rem; background: white; overflow: hidden; transition: all 0.3s; }
    .faq-item:hover { border-color: rgba(234,179,8,0.3); box-shadow: var(--shadow-sm); }
    .faq-question { width: 100%; text-align: left; padding: 1.1rem 1.4rem; background: none; border: none; font-size: 1rem; font-weight: 600; color: var(--primary); cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
    .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; padding: 0 1.4rem; font-size: 0.92rem; color: #64748b; line-height: 1.8; }
    .faq-item.open .faq-answer { max-height: 300px; padding-bottom: 1.2rem; }
    .faq-item.open .faq-icon { transform: rotate(180deg); }
    .faq-icon { transition: transform 0.3s; color: var(--secondary); flex-shrink: 0; }

    /* 深色区块 */
    .dark-section {
      background: linear-gradient(135deg, var(--night) 0%, #0f2b46 100%);
      position: relative; overflow: hidden;
    }
    .dark-section::before {
      content: ''; position: absolute; top: -50%; right: -20%;
      width: 500px; height: 500px; border-radius: 50%;
      background: radial-gradient(circle, rgba(234,179,8,0.1) 0%, transparent 70%);
      pointer-events: none;
    }

    /* CTA */
    .cta-button {
      display: inline-flex; align-items: center; gap: 0.6rem;
      background: linear-gradient(135deg, var(--secondary) 0%, #f59e0b 100%);
      color: var(--primary); font-weight: 700; font-size: 1rem;
      padding: 0.85rem 2rem; border-radius: 999px;
      transition: all 0.3s; box-shadow: 0 8px 24px rgba(234,179,8,0.3);
    }
    .cta-button:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(234,179,8,0.45); }
    .cta-button-outline {
      display: inline-flex; align-items: center; gap: 0.6rem;
      border: 2px solid rgba(255,255,255,0.4); color: #fff; font-weight: 600;
      padding: 0.8rem 1.8rem; border-radius: 999px; transition: all 0.3s;
    }
    .cta-button-outline:hover { background: rgba(255,255,255,0.1); border-color: var(--secondary); transform: translateY(-3px); }

    /* 底部 */
    .site-footer { background: var(--night); color: rgba(255,255,255,0.65); padding: 4rem 0 0; margin-top: 0; }
    .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 3rem; padding-bottom: 3rem; border-bottom: 1px solid rgba(255,255,255,0.08); }
    .footer-brand h3 { font-size: 1.3rem; font-weight: 800; color: #fff; margin-bottom: 1rem; display: flex; align-items: center; }
    .footer-brand p { font-size: 0.88rem; line-height: 1.8; }
    .footer-col h4 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 1.2rem; }
    .footer-col a { display: block; color: rgba(255,255,255,0.55); font-size: 0.88rem; padding: 0.35rem 0; text-decoration: none; transition: all 0.3s; }
    .footer-col a:hover { color: var(--secondary); padding-left: 0.4rem; }
    .footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 1.5rem 0; font-size: 0.82rem; color: rgba(255,255,255,0.35); }

    /* 标签 */
    .tag-pill {
      display: inline-flex; align-items: center; gap: 0.35rem;
      background: rgba(234,179,8,0.1); color: #92400e;
      font-size: 0.78rem; font-weight: 600; padding: 0.25rem 0.8rem;
      border-radius: 999px; border: 1px solid rgba(234,179,8,0.25);
    }

    /* 移动端菜单 */
    .mobile-menu {
      display: none; background: white; border-top: 1px solid rgba(15,43,70,0.06);
      padding: 0.75rem 1.5rem 1.25rem; gap: 0.4rem; flex-direction: column;
    }
    .mobile-menu.show { display: flex; }
    .mobile-menu .nav-item { padding: 0.75rem 1rem; border-radius: 0.6rem; }
    .mobile-menu .nav-item.active { background: var(--primary); }

    /* 页内锚点偏移 */
    .section-anchor { scroll-margin-top: 90px; }

    @media (max-width: 1024px) {
      .nav-links { margin-left: 1rem; }
      .nav-item { padding: 0.5rem 0.8rem; font-size: 0.82rem; }
      .nav-search input { width: 130px; }
      .banner-title { font-size: 2.1rem; }
    }
    @media (max-width: 768px) {
      .main-nav { flex-wrap: wrap; height: auto; padding: 0.8rem 1rem; }
      .brand-logo { font-size: 1rem; }
      .nav-links { display: none; }
      .nav-search { display: none; }
      .hamburger { display: block; margin-left: auto; }
      .page-banner { padding: 3.2rem 0; }
      .banner-title { font-size: 1.7rem; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
      .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
      .stat-num { font-size: 1.8rem; }
      .section-title { font-size: 1.5rem; }
    }
    @media (max-width: 520px) {
      .footer-grid { grid-template-columns: 1fr; }
      .banner-badge { font-size: 0.72rem; }
      .banner-title { font-size: 1.4rem; }
      .step-item { padding-left: 3.2rem; }
    }