/* roulang page: index */
:root {
  --primary: #1d4ed8;
  --primary-dark: #1e40af;
  --primary-darker: #172554;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --dark-bg: #0f172a;
  --dark-bg-light: #1e293b;
  --body-bg: #f8fafc;
  --card-bg: #ffffff;
  --text-main: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 999px;
  --shadow-sm: 0 1px 2px rgba(15,23,42,0.06), 0 1px 2px rgba(15,23,42,0.04);
  --shadow-md: 0 4px 12px rgba(15,23,42,0.08);
  --shadow-lg: 0 12px 32px rgba(15,23,42,0.12);
  --shadow-xl: 0 24px 48px rgba(15,23,42,0.16);
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --sidebar-width: 248px;
  --topbar-height: 64px;
  --transition: all 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background: var(--body-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  transition: var(--transition);
}

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

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

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

/* ===== App Shell ===== */
.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: linear-gradient(180deg, #0f172a 0%, #1a2744 100%);
  z-index: 1050;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.sidebar-header {
  padding: 28px 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #ffba3d);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0f172a;
  font-size: 18px;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.35);
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.brand-sub {
  display: block;
  font-size: 11px;
  font-weight: 400;
  color: rgba(255,255,255,0.6);
  letter-spacing: 1px;
  margin-top: 2px;
}

.sidebar-nav {
  flex: 1;
  padding: 20px 12px;
  overflow-y: auto;
}

.nav-section-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: rgba(255,255,255,0.4);
  padding: 0 12px 10px;
  font-weight: 700;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  margin-bottom: 4px;
  border-radius: 10px;
  color: rgba(255,255,255,0.68);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  border-left: 3px solid transparent;
}

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

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

.nav-link.active {
  color: var(--accent);
  background: rgba(245,158,11,0.1);
  border-left-color: var(--accent);
}

.sidebar-foot {
  padding: 16px;
}

.foot-card {
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px solid rgba(255,255,255,0.08);
}

.foot-card p {
  color: rgba(255,255,255,0.65);
  font-size: 13px;
  margin-bottom: 6px;
}

.foot-card a {
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
}

.sidebar-mask {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.5);
  z-index: 1040;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.sidebar-mask.show {
  opacity: 1;
  visibility: visible;
}

/* ===== Main Wrap ===== */
.main-wrap {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ===== Topbar ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 1020;
  height: var(--topbar-height);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-main);
  background: var(--border-light);
}

.menu-toggle:hover {
  background: var(--border-color);
}

.topbar-search {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--border-light);
  border-radius: var(--radius-full);
  padding: 0 16px;
  height: 40px;
  width: 280px;
  transition: var(--transition);
}

.topbar-search:focus-within {
  box-shadow: 0 0 0 3px rgba(29,78,216,0.12);
  background: #fff;
  border: 1px solid var(--primary);
}

.topbar-search i {
  color: var(--text-muted);
  font-size: 14px;
}

.topbar-search input {
  border: none;
  background: transparent;
  outline: none;
  flex: 1;
  font-size: 14px;
  color: var(--text-main);
}

.topbar-search input::placeholder {
  color: var(--text-muted);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-lang {
  color: var(--text-secondary);
  font-size: 14px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}

.topbar-lang:hover {
  background: var(--border-light);
  color: var(--text-main);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  border: 2px solid transparent;
  line-height: 1.4;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid rgba(29,78,216,0.4);
  outline-offset: 2px;
}

.btn-accent {
  background: var(--accent);
  color: #0f172a;
  box-shadow: 0 4px 12px rgba(245,158,11,0.3);
}

.btn-accent:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(245,158,11,0.35);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(29,78,216,0.25);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(29,78,216,0.3);
}

.btn-outline-light {
  background: transparent;
  border-color: rgba(255,255,255,0.6);
  color: #fff;
}

.btn-outline-light:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: 7px 16px;
  font-size: 13px;
  border-radius: 8px;
}

.btn-block {
  width: 100%;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 550px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--dark-bg);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(15,23,42,0.92) 0%, rgba(15,23,42,0.78) 40%, rgba(15,23,42,0.4) 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  padding-top: 80px;
  padding-bottom: 80px;
}

.hero-content {
  max-width: 680px;
  color: #fff;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(245,158,11,0.15);
  color: var(--accent);
  border: 1px solid rgba(245,158,11,0.3);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 20px;
  backdrop-filter: blur(4px);
}

.hero-badge i {
  font-size: 13px;
}

.hero-content h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
  letter-spacing: -1px;
  color: #fff;
}

.hero-content h1 span {
  color: var(--accent);
}

.hero-desc {
  font-size: 18px;
  line-height: 1.7;
  color: rgba(255,255,255,0.75);
  margin-bottom: 32px;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.hero-stat {
  text-align: left;
}

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

.hero-stat span {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
}

/* ===== Hot Strip ===== */
.hot-strip {
  background: var(--dark-bg-light);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 14px 0;
  color: rgba(255,255,255,0.8);
  font-size: 14px;
}

.hot-strip .container {
  display: flex;
  align-items: center;
  gap: 16px;
}

.hot-label {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(245,158,11,0.2);
  color: var(--accent);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
}

.hot-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: rgba(255,255,255,0.85);
}

.hot-title a {
  color: rgba(255,255,255,0.85);
}

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

/* ===== Section ===== */
.section {
  padding: var(--space-7) 0;
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.section-header .section-eyebrow {
  display: inline-block;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-header .section-eyebrow::before,
.section-header .section-eyebrow::after {
  content: "— ";
  color: var(--accent);
}

.section-header .section-eyebrow::after {
  content: " —";
}

.section-title {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 12px;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ===== Feature Cards ===== */
.features {
  padding: var(--space-7) 0;
}

.feature-col {
  margin-bottom: 24px;
}

.feature-card {
  height: 100%;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  text-align: center;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(29,78,216,0.2);
}

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto 20px;
  color: #fff;
}

.feature-icon.blue {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  box-shadow: 0 8px 20px rgba(29,78,216,0.25);
}

.feature-icon.gold {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  box-shadow: 0 8px 20px rgba(245,158,11,0.25);
}

.feature-icon.green {
  background: linear-gradient(135deg, #10b981, #059669);
  box-shadow: 0 8px 20px rgba(16,185,129,0.25);
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===== Category Cards ===== */
.cat-section {
  background: var(--dark-bg);
  padding: var(--space-7) 0;
  position: relative;
  overflow: hidden;
}

.cat-section .section-title {
  color: #fff;
}

.cat-section .section-desc {
  color: rgba(255,255,255,0.65);
}

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

.cat-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--dark-bg-light);
  border: 1px solid rgba(255,255,255,0.08);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  min-height: 320px;
}

.cat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(245,158,11,0.3);
}

.cat-img {
  height: 180px;
  overflow: hidden;
  position: relative;
}

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

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

.cat-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--dark-bg-light), transparent);
}

.cat-body {
  padding: 24px 28px 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.cat-body h3 {
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
}

.cat-body p {
  color: rgba(255,255,255,0.65);
  font-size: 14px;
  line-height: 1.65;
  flex: 1;
  margin-bottom: 18px;
}

.cat-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-weight: 600;
  font-size: 15px;
}

.cat-link i {
  transition: transform 0.25s ease;
}

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

/* ===== News Section ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.news-row {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.news-row:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.news-thumb {
  height: 180px;
  overflow: hidden;
  background: var(--border-light);
  position: relative;
}

.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.news-row:hover .news-thumb img {
  transform: scale(1.05);
}

.news-thumb .badge {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
}

.news-info {
  padding: 20px 24px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-info h3 {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
}

.news-info h3 a {
  color: var(--text-main);
}

.news-info h3 a:hover {
  color: var(--primary);
}

.news-info p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.news-meta i {
  font-size: 12px;
}

/* ===== Badge ===== */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.4;
  background: rgba(29,78,216,0.1);
  color: var(--primary);
}

.badge-light {
  background: rgba(100,116,139,0.12);
  color: var(--text-secondary);
}

.badge-accent {
  background: rgba(245,158,11,0.12);
  color: var(--accent-dark);
}

/* ===== Rank Section ===== */
.rank-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.rank-item {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.rank-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(6px);
  border-color: rgba(29,78,216,0.2);
}

.rank-num {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: var(--border-light);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  flex-shrink: 0;
}

.rank-item:nth-child(1) .rank-num {
  background: var(--accent);
  color: #0f172a;
}

.rank-item:nth-child(2) .rank-num {
  background: rgba(245,158,11,0.2);
  color: var(--accent-dark);
}

.rank-item:nth-child(3) .rank-num {
  background: rgba(29,78,216,0.1);
  color: var(--primary);
}

.rank-content {
  flex: 1;
}

.rank-content a {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  display: block;
}

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

.rank-content span {
  font-size: 13px;
  color: var(--text-muted);
}

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

.step-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 32px 24px;
  text-align: center;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.step-num {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 16px rgba(29,78,216,0.25);
}

.step-card:nth-child(even) .step-num {
  background: linear-gradient(135deg, var(--accent), #fbbf24);
  box-shadow: 0 8px 16px rgba(245,158,11,0.25);
  color: #0f172a;
}

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

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

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

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

.faq-item:hover {
  border-color: rgba(29,78,216,0.25);
  box-shadow: var(--shadow-sm);
}

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

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

.faq-item.active .faq-question::after {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
  border-top: 1px solid transparent;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 16px 24px 20px;
  border-top-color: var(--border-light);
}

/* ===== CTA ===== */
.cta-section {
  padding: var(--space-7) 0;
  background: transparent;
}

.cta-box {
  background: linear-gradient(120deg, var(--dark-bg), var(--primary-darker));
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 60%;
  height: 200%;
  background: rgba(245,158,11,0.08);
  border-radius: 50%;
  filter: blur(60px);
}

.cta-box::after {
  content: '';
  position: absolute;
  bottom: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: rgba(59,130,246,0.08);
  border-radius: 50%;
  filter: blur(60px);
}

.cta-box > * {
  position: relative;
  z-index: 2;
}

.cta-title {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.cta-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

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

/* ===== Footer ===== */
.site-footer {
  background: var(--dark-bg);
  color: rgba(255,255,255,0.65);
  padding: var(--space-6) 0 0;
  margin-top: auto;
}

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

.footer-brand .brand {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.5);
  max-width: 260px;
}

.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
}

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

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

.footer-links a {
  color: rgba(255,255,255,0.55);
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

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

.footer-links i {
  font-size: 12px;
  color: rgba(255,255,255,0.3);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

.footer-bottom a {
  color: rgba(255,255,255,0.6);
}

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

/* ===== Empty Tip ===== */
.empty-tip {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: 15px;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border-color);
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .sidebar {
    transform: translateX(-100%);
    box-shadow: var(--shadow-xl);
  }

  .sidebar.open {
    transform: translateX(0);
  }

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

  .menu-toggle {
    display: flex;
  }

  .topbar {
    padding: 0 16px;
  }

  .topbar-search {
    width: 200px;
  }

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

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

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

@media (max-width: 768px) {
  .section {
    padding: 48px 0;
  }

  .hero {
    min-height: 460px;
  }

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

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

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

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

  .hero-stats {
    gap: 24px;
  }

  .hero-stat strong {
    font-size: 22px;
  }

  .topbar-search {
    display: none;
  }

  .hot-strip .container {
    gap: 10px;
    flex-wrap: nowrap;
  }

  .hot-title {
    max-width: 70%;
  }

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

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

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

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

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

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

  .brand-name {
    font-size: 16px;
  }
}

@media (max-width: 520px) {
  .hero-content h1 {
    font-size: 28px;
  }

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

  .btn-lg {
    padding: 12px 20px;
  }

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

  .cat-card {
    min-height: auto;
  }

  .cat-img {
    height: 140px;
  }

  .cat-body {
    padding: 18px 20px 22px;
  }

  .rank-item {
    padding: 12px 14px;
    gap: 12px;
  }

  .rank-content a {
    font-size: 14px;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 14px;
  }

  .faq-answer {
    padding: 0 18px;
  }

  .faq-item.active .faq-answer {
    padding: 14px 18px 16px;
  }

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

  .cta-title {
    font-size: 20px;
  }

  .cta-btn-wrap {
    flex-direction: column;
  }

  .cta-btn-wrap .btn {
    width: 100%;
  }

  .footer-bottom {
    font-size: 12px;
    padding: 16px;
  }
}

/* roulang page: category1 */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --primary-soft: #eff6ff;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --accent-soft: #fef3c7;
  --bg-body: #f8fafc;
  --bg-white: #ffffff;
  --bg-dark: #0f172a;
  --bg-dark-lighter: #1e293b;
  --text-main: #1e293b;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.12);
  --transition: all 0.25s ease;
  --sidebar-width: 260px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-body);
  color: var(--text-body);
  line-height: 1.7;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container-app {
  width: 100%;
  min-height: 100vh;
}

.app-wrap {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-dark);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1000;
  overflow-y: auto;
  padding: 24px 20px;
  transition: transform 0.3s ease;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 8px 28px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  transition: var(--transition);
}

.brand:hover {
  opacity: 0.85;
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 1px;
  line-height: 1.3;
}

.brand-sub {
  font-size: 11px;
  color: rgba(255,255,255,0.6);
  font-weight: 400;
  letter-spacing: 2px;
}

.nav-section-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: rgba(255,255,255,0.4);
  padding: 8px 12px;
  margin-bottom: 8px;
  font-weight: 500;
}

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

.nav-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 15px;
  transition: var(--transition);
  border: 1px solid transparent;
}

.nav-link i {
  width: 22px;
  text-align: center;
  font-size: 16px;
}

.nav-link:hover {
  background: rgba(255,255,255,0.08);
  color: #fff;
}

.nav-link.active {
  background: linear-gradient(135deg, rgba(37,99,235,0.6), rgba(29,78,216,0.4));
  color: #fff;
  border-color: rgba(59,130,246,0.3);
  box-shadow: 0 4px 16px rgba(37,99,235,0.2);
}

.sidebar-footer-info {
  margin-top: 32px;
  padding: 16px 12px;
  border-radius: 12px;
  background: rgba(255,255,255,0.05);
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  line-height: 1.6;
}

.sidebar-footer-info i {
  font-size: 14px;
  margin-right: 6px;
  color: var(--accent);
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  height: var(--header-height);
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 40px;
  position: sticky;
  top: 0;
  z-index: 900;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-white);
  color: var(--text-main);
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.menu-toggle:hover {
  background: var(--primary-soft);
  border-color: var(--primary-light);
  color: var(--primary);
}

.topbar-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
}

.topbar-breadcrumb a {
  color: var(--text-muted);
}

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

.topbar-breadcrumb .separator {
  color: var(--text-light);
  font-size: 12px;
}

.topbar-breadcrumb .current {
  color: var(--text-main);
  font-weight: 500;
}

.topbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 16px;
}

.topbar-search {
  position: relative;
}

.topbar-search input {
  width: 260px;
  height: 40px;
  border-radius: 20px;
  border: 1px solid var(--border);
  padding: 0 20px 0 42px;
  font-size: 14px;
  font-family: inherit;
  background: var(--bg-body);
  transition: var(--transition);
}

.topbar-search input:focus {
  outline: none;
  border-color: var(--primary-light);
  background: var(--bg-white);
  box-shadow: 0 0 0 4px rgba(37,99,235,0.1);
}

.topbar-search i {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  font-size: 14px;
}

.topbar-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  background: var(--bg-body);
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid var(--border);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 4px rgba(34,197,94,0.15);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.page-content {
  flex: 1;
  padding: 0;
}

.category-hero {
  position: relative;
  padding: 72px 48px 64px;
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-lighter) 100%);
  border-radius: 0 0 32px 32px;
  overflow: hidden;
}

.category-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.12;
}

.category-hero::after {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37,99,235,0.3), transparent 70%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(37,99,235,0.2);
  border: 1px solid rgba(59,130,246,0.3);
  color: var(--primary-light);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.hero-tag i {
  font-size: 12px;
}

.category-hero h1 {
  font-size: 36px;
  font-weight: 900;
  color: #fff;
  margin: 0 0 12px;
  line-height: 1.3;
}

.category-hero p {
  font-size: 16px;
  color: rgba(255,255,255,0.75);
  line-height: 1.8;
  margin: 0;
  max-width: 640px;
}

.hero-breadcrumb {
  margin-top: 20px;
}

.hero-breadcrumb a, .hero-breadcrumb span {
  color: rgba(255,255,255,0.5);
  font-size: 13px;
}

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

.hero-breadcrumb .sep {
  margin: 0 8px;
  font-size: 11px;
}

.section-block {
  padding: 56px 48px;
  border-bottom: 1px solid var(--border-light);
}

.section-block:last-child {
  border-bottom: none;
}

.section-header {
  margin-bottom: 32px;
}

.section-header h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-main);
  margin: 0 0 8px;
  position: relative;
  padding-left: 20px;
}

.section-header h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 5px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--primary-light), var(--primary-dark));
}

.section-header p {
  font-size: 15px;
  color: var(--text-muted);
  margin: 0;
}

.section-header-center {
  text-align: center;
  margin-bottom: 40px;
}

.section-header-center h2 {
  padding-left: 0;
  font-size: 28px;
}

.section-header-center h2::before {
  display: none;
}

.section-header-center p {
  max-width: 560px;
  margin: 0 auto;
}

.step-flow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.step-item {
  position: relative;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.step-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.step-number {
  position: absolute;
  top: 16px;
  left: 16px;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-icon {
  width: 64px;
  height: 64px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--primary-soft), #dbeafe);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--primary);
  font-size: 26px;
}

.step-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin: 0 0 8px;
}

.step-item p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

.step-arrow {
  position: absolute;
  top: 50%;
  right: -20px;
  transform: translateY(-50%);
  color: var(--text-light);
  font-size: 18px;
  z-index: 2;
  display: none;
}

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

.section-intro {
  max-width: 720px;
  margin-bottom: 40px;
}

.section-intro h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  margin: 0 0 12px;
}

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

.login-methods-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 20px;
}

.login-card {
  background: var(--bg-body);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

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

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

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

.login-card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
  transition: var(--transition);
}

.login-card:hover .login-card-icon {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 16px rgba(37,99,235,0.3);
}

.login-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  margin: 0 0 8px;
}

.login-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

.login-card .badge-popular {
  position: absolute;
  top: 18px;
  right: 18px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
}

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

.troubleshoot-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 860px;
}

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

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

.trouble-icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.trouble-content h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin: 0 0 6px;
}

.trouble-content p {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.6;
}

.trouble-solution {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
  text-decoration: none;
}

.trouble-solution:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.tips-box {
  background: linear-gradient(135deg, var(--primary-soft), #e0f2fe);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  border: 1px solid #bfdbfe;
  margin-top: 32px;
  max-width: 860px;
}

.tips-box h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--primary-dark);
  margin: 0 0 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

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

.featured-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

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

.featured-card-cover {
  position: relative;
  height: 180px;
  overflow: hidden;
}

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

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

.featured-card-cover::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60%;
  background: linear-gradient(transparent, rgba(15,23,42,0.4));
}

.featured-card-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(8px);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-main);
}

.featured-card-body {
  padding: 20px;
}

.featured-card-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin: 0 0 8px;
  line-height: 1.4;
}

.featured-card-body p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0 0 16px;
}

.featured-card-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}

.read-more {
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
}

.read-more:hover {
  color: var(--primary-dark);
  gap: 10px;
}

.info-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--text-muted);
}

.info-badge i {
  color: var(--text-light);
}

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

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

.accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
  background: var(--bg-white);
}

.accordion-item:hover {
  border-color: var(--primary-light);
}

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

.accordion-header {
  width: 100%;
  background: none;
  border: none;
  padding: 20px 24px;
  text-align: left;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

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

.accordion-header i {
  font-size: 14px;
  color: var(--text-light);
  transition: transform 0.3s ease;
}

.accordion-item.active .accordion-header i {
  transform: rotate(180deg);
  color: var(--primary);
}

.accordion-body {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.3s ease;
}

.accordion-item.active .accordion-body {
  max-height: 400px;
  padding: 0 24px 20px;
}

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

.cta-banner {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
  border-radius: var(--radius-xl);
  padding: 48px;
  margin: 0 48px 56px;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.08;
}

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

.cta-banner h2 {
  font-size: 28px;
  font-weight: 900;
  color: #fff;
  margin: 0 0 12px;
}

.cta-banner p {
  font-size: 15px;
  color: rgba(255,255,255,0.8);
  margin: 0 auto 24px;
  max-width: 500px;
  line-height: 1.7;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 28px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: inherit;
  text-decoration: none;
}

.btn-light {
  background: #fff;
  color: var(--primary-dark);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.btn-light:hover {
  background: var(--primary-soft);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  transform: translateY(-2px);
}

.btn-dark {
  background: var(--bg-dark);
  color: #fff;
}

.btn-dark:hover {
  background: var(--bg-dark-lighter);
  transform: translateY(-2px);
}

.site-footer {
  background: var(--bg-dark);
  padding: 48px 48px 28px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand .brand-name {
  font-size: 20px;
}

.footer-brand .brand-sub {
  font-size: 12px;
  display: block;
}

.footer-brand p {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  line-height: 1.8;
  margin: 16px 0 0;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin: 0 0 16px;
  position: relative;
  padding-bottom: 8px;
}

.footer-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--primary-light);
  border-radius: 2px;
}

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

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}

.footer-links a i {
  font-size: 9px;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  margin: 0;
}

.footer-bottom a {
  color: rgba(255,255,255,0.6);
}

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

.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15,23,42,0.5);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s;
}

@media screen and (max-width: 1024px) {
  .step-flow-grid {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 30px;
  }

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

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

  .sidebar {
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay.open {
    display: block;
    opacity: 1;
  }

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

  .menu-toggle {
    display: flex;
  }

  .topbar {
    padding: 0 24px;
  }

  .topbar-search {
    display: none;
  }

  .category-hero,
  .section-block {
    padding-left: 24px;
    padding-right: 24px;
  }

  .cta-banner {
    margin: 0 24px 40px;
    padding: 36px 28px;
  }
}

@media screen and (max-width: 768px) {
  .category-hero h1 {
    font-size: 28px;
  }

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

  .section-block {
    padding: 40px 20px;
  }

  .section-header-center h2 {
    font-size: 24px;
  }

  .step-flow-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .step-arrow {
    display: none;
  }

  .login-methods-grid,
  .featured-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .troubleshoot-item {
    flex-direction: column;
    gap: 12px;
  }

  .cta-banner {
    margin: 0 20px 32px;
    padding: 32px 20px;
    border-radius: var(--radius-lg);
  }

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

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

  .topbar-breadcrumb {
    font-size: 13px;
  }

  .footer-brand .brand-name {
    font-size: 18px;
  }

  .topbar-status {
    display: none;
  }
}

@media screen and (max-width: 520px) {
  .category-hero {
    padding: 48px 20px 40px;
  }

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

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

  .topbar {
    padding: 0 16px;
    height: 60px;
  }

  .topbar-breadcrumb .breadcrumb-parent {
    display: none;
  }

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

  .cta-banner h2 {
    font-size: 20px;
  }

  .cta-banner p {
    font-size: 14px;
  }

  .footer-grid {
    gap: 24px;
  }

  .site-footer {
    padding: 40px 20px 24px;
  }

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

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

  .accordion-header {
    padding: 16px 18px;
    font-size: 14px;
  }

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

  .accordion-item.active .accordion-body {
    padding: 0 18px 16px;
  }

  .step-item {
    padding: 24px 20px;
  }

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

  .troubleshoot-item {
    padding: 18px 16px;
  }
}

/* roulang page: article */
:root {
            --c-primary: #1e3a5f;
            --c-primary-dark: #152c4c;
            --c-accent: #e8833a;
            --c-accent-light: #fff3e8;
            --c-bg: #f5f7fb;
            --c-card: #ffffff;
            --c-text: #1e293b;
            --c-text-weak: #64748b;
            --c-border: #e2e8f0;
            --r-lg: 16px;
            --r-md: 12px;
            --r-sm: 8px;
            --s-card: 0 4px 24px rgba(30, 58, 95, 0.08);
            --s-hover: 0 12px 40px rgba(30, 58, 95, 0.14);
            --sidebar-w: 268px;
            --topbar-h: 68px;
            --transition: all 0.25s ease;
        }
        *,
        *::before,
        *::after {
            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(--c-bg);
            color: var(--c-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .app-shell {
            min-height: 100vh;
            display: flex;
        }
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-w);
            background: linear-gradient(180deg, #0e1e33 0%, #162c4e 100%);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 0;
            overflow-y: auto;
            border-right: 1px solid rgba(255, 255, 255, 0.06);
        }
        .sidebar-header {
            padding: 28px 22px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .brand-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: var(--c-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            box-shadow: 0 4px 14px rgba(232, 131, 58, 0.35);
            flex-shrink: 0;
        }
        .brand-text {
            display: flex;
            flex-direction: column;
        }
        .brand-name {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            line-height: 1.3;
            white-space: nowrap;
        }
        .brand-sub {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.55);
            letter-spacing: 1px;
            margin-top: 1px;
        }
        .sidebar-nav {
            padding: 18px 14px;
            flex: 1;
        }
        .nav-section-title {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: rgba(255, 255, 255, 0.35);
            padding: 0 12px;
            margin-bottom: 10px;
            font-weight: 600;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 14px;
            border-radius: var(--r-md);
            color: rgba(255, 255, 255, 0.72);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            margin-bottom: 4px;
        }
        .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
        }
        .nav-link:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            transform: translateX(2px);
        }
        .nav-link.active {
            background: rgba(232, 131, 58, 0.16);
            color: var(--c-accent);
            border-left: 3px solid var(--c-accent);
            border-radius: var(--r-sm) var(--r-md) var(--r-md) var(--r-sm);
            font-weight: 600;
        }
        .sidebar-card {
            margin: 16px 16px 12px;
            padding: 18px 16px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--r-md);
            border: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
        }
        .sidebar-card-icon {
            font-size: 28px;
            color: var(--c-accent);
            margin-bottom: 8px;
        }
        .sidebar-card p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
            margin-bottom: 10px;
        }
        .sidebar-card a {
            display: inline-block;
            background: var(--c-accent);
            color: #fff;
            font-size: 13px;
            padding: 7px 18px;
            border-radius: 20px;
            transition: var(--transition);
        }
        .sidebar-card a:hover {
            background: #d96f2a;
            transform: scale(1.03);
        }
        .sidebar-footer-text {
            padding: 14px 20px;
            font-size: 11px;
            color: rgba(255, 255, 255, 0.3);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            text-align: center;
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 990;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .sidebar-overlay.show {
            display: block;
            opacity: 1;
        }
        .main-wrapper {
            flex: 1;
            margin-left: var(--sidebar-w);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        .topbar {
            height: var(--topbar-h);
            background: #fff;
            border-bottom: 1px solid var(--c-border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 28px;
            position: sticky;
            top: 0;
            z-index: 500;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
        }
        .topbar-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .topbar-label {
            font-size: 15px;
            font-weight: 600;
            color: var(--c-primary);
        }
        .topbar-right {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .topbar-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 8px 14px;
            border-radius: 20px;
            font-size: 13px;
            color: var(--c-text-weak);
            transition: var(--transition);
        }
        .topbar-link:hover {
            background: var(--c-bg);
            color: var(--c-primary);
        }
        .topbar-link.active {
            background: var(--c-accent-light);
            color: var(--c-accent);
            font-weight: 600;
        }
        .topbar-btn {
            display: none;
            background: none;
            border: none;
            font-size: 20px;
            color: var(--c-primary);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .topbar-btn:hover {
            background: var(--c-bg);
        }
        .main-content {
            flex: 1;
            padding: 0;
        }
        .article-hero {
            position: relative;
            background: linear-gradient(135deg, rgba(14, 30, 51, 0.92), rgba(22, 44, 78, 0.85)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            padding: 56px 0 48px;
            color: #fff;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--c-accent);
        }
        .breadcrumb .current {
            color: rgba(255, 255, 255, 0.9);
            max-width: 260px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .breadcrumb i {
            font-size: 10px;
        }
        .article-heading {
            max-width: 860px;
        }
        .article-category-tag {
            display: inline-block;
            background: rgba(232, 131, 58, 0.2);
            border: 1px solid rgba(232, 131, 58, 0.45);
            color: #f5a572;
            font-size: 12px;
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
            font-weight: 600;
        }
        .article-heading h1 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.35;
            letter-spacing: 0.3px;
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i {
            font-size: 12px;
        }
        .article-layout {
            padding: 40px 0 24px;
        }
        .article-main {
            max-width: 860px;
            margin: 0 auto;
        }
        .article-cover {
            border-radius: var(--r-lg);
            overflow: hidden;
            margin-bottom: 28px;
            box-shadow: var(--s-card);
            aspect-ratio: 16/8;
        }
        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .article-cover:hover img {
            transform: scale(1.02);
        }
        .article-body {
            background: var(--c-card);
            border-radius: var(--r-lg);
            padding: 40px;
            box-shadow: var(--s-card);
            font-size: 16px;
            line-height: 1.85;
            color: #334155;
        }
        .article-body h2,
        .article-body h3,
        .article-body h4 {
            color: var(--c-primary);
            margin-top: 28px;
            margin-bottom: 14px;
            font-weight: 700;
            line-height: 1.4;
        }
        .article-body p {
            margin-bottom: 18px;
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 20px 22px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body blockquote {
            background: var(--c-accent-light);
            border-left: 4px solid var(--c-accent);
            padding: 16px 20px;
            border-radius: 0 var(--r-sm) var(--r-sm) 0;
            margin: 20px 0;
            font-style: italic;
            color: #7c5a3a;
        }
        .article-body img {
            border-radius: var(--r-md);
            margin: 20px 0;
        }
        .article-footer-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 24px;
            padding-top: 20px;
            border-top: 1px solid var(--c-border);
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--c-bg);
            border: 1px solid var(--c-border);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            color: var(--c-text-weak);
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--c-accent-light);
            border-color: var(--c-accent);
            color: var(--c-accent);
        }
        .category-guide {
            padding: 60px 0;
            background: #fff;
            border-top: 1px solid var(--c-border);
            border-bottom: 1px solid var(--c-border);
        }
        .section-head {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-head h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--c-primary);
            margin-bottom: 8px;
            letter-spacing: 0.5px;
        }
        .section-head p {
            color: var(--c-text-weak);
            font-size: 15px;
            max-width: 560px;
            margin: 0 auto;
        }
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            max-width: 860px;
            margin: 0 auto;
        }
        .guide-card {
            display: flex;
            gap: 20px;
            padding: 28px;
            background: var(--c-bg);
            border-radius: var(--r-lg);
            border: 1px solid var(--c-border);
            transition: var(--transition);
        }
        .guide-card:hover {
            background: #fff;
            box-shadow: var(--s-hover);
            transform: translateY(-4px);
            border-color: rgba(232, 131, 58, 0.3);
        }
        .guide-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: var(--c-primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            flex-shrink: 0;
            box-shadow: 0 6px 18px rgba(30, 58, 95, 0.2);
        }
        .guide-card:nth-child(2) .guide-icon {
            background: var(--c-accent);
            box-shadow: 0 6px 18px rgba(232, 131, 58, 0.3);
        }
        .guide-info h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--c-primary);
        }
        .guide-info p {
            font-size: 14px;
            color: var(--c-text-weak);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .guide-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--c-accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .guide-card:hover .guide-more {
            gap: 10px;
        }
        .faq-section {
            padding: 60px 0;
            background: var(--c-bg);
        }
        .faq-grid {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--c-card);
            border-radius: var(--r-md);
            border: 1px solid var(--c-border);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(232, 131, 58, 0.3);
            box-shadow: var(--s-card);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 22px;
            cursor: pointer;
            user-select: none;
        }
        .faq-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--c-accent-light);
            color: var(--c-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
        }
        .faq-question h3 {
            flex: 1;
            font-size: 16px;
            font-weight: 600;
            color: var(--c-text);
            line-height: 1.5;
        }
        .faq-toggle {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--c-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--c-text-weak);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-toggle {
            background: var(--c-accent);
            color: #fff;
            transform: rotate(135deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-answer-inner {
            padding: 0 22px 22px 72px;
            font-size: 14px;
            color: var(--c-text-weak);
            line-height: 1.75;
        }
        .faq-answer-inner p {
            margin-bottom: 8px;
        }
        .cta-section {
            padding: 60px 0;
            background: linear-gradient(135deg, var(--c-primary) 0%, #244b7a 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.03);
        }
        .cta-box {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            max-width: 980px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
            flex-wrap: wrap;
        }
        .cta-content {
            flex: 1;
            min-width: 280px;
        }
        .cta-content h2 {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: 0.5px;
        }
        .cta-content p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 15px;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 30px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
        }
        .btn-light {
            background: #fff;
            color: var(--c-primary);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
        }
        .btn-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
        }
        .btn-outline-light {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.6);
            color: #fff;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            transform: translateY(-3px);
        }
        .btn-primary {
            background: var(--c-primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(30, 58, 95, 0.25);
        }
        .btn-primary:hover {
            background: var(--c-primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(30, 58, 95, 0.35);
        }
        .not-found-section {
            padding: 80px 0;
        }
        .not-found-card {
            max-width: 560px;
            margin: 0 auto;
            background: var(--c-card);
            border-radius: var(--r-lg);
            padding: 50px 40px;
            text-align: center;
            box-shadow: var(--s-card);
            border: 1px solid var(--c-border);
        }
        .not-found-icon {
            font-size: 56px;
            color: var(--c-accent);
            margin-bottom: 20px;
        }
        .not-found-card h1 {
            font-size: 28px;
            font-weight: 800;
            color: var(--c-primary);
            margin-bottom: 12px;
        }
        .not-found-card p {
            color: var(--c-text-weak);
            font-size: 15px;
            margin-bottom: 24px;
        }
        .site-footer {
            background: #0e1e33;
            color: rgba(255, 255, 255, 0.65);
            padding: 56px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .brand .brand-name {
            font-size: 17px;
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 14px;
            max-width: 320px;
        }
        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--c-accent);
            padding-left: 3px;
        }
        .footer-links i {
            font-size: 9px;
            margin-top: 1px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--c-accent);
        }

        @media (max-width: 1024px) {
            :root {
                --sidebar-w: 240px;
            }
            .faq-grid,
            .guide-grid,
            .article-main {
                max-width: 100%;
            }
            .guide-grid {
                grid-template-columns: 1fr;
                max-width: 620px;
            }
            .article-body {
                padding: 32px;
            }
            .article-heading h1 {
                font-size: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-w: 0px;
            }
            .sidebar {
                transform: translateX(-100%);
                transition: transform 0.35s ease;
                width: 280px;
            }
            .sidebar.show {
                transform: translateX(0);
            }
            .sidebar-overlay.show {
                display: block;
                opacity: 1;
            }
            .main-wrapper {
                margin-left: 0;
            }
            .topbar {
                padding: 0 16px;
                height: 60px;
            }
            .topbar-btn {
                display: inline-flex;
            }
            .topbar-right {
                display: none;
            }
            .topbar-label {
                font-size: 14px;
            }
            .article-hero {
                padding: 40px 0 36px;
            }
            .article-heading h1 {
                font-size: 24px;
            }
            .article-meta {
                gap: 12px;
                font-size: 12px;
            }
            .article-layout {
                padding: 24px 0 16px;
            }
            .article-body {
                padding: 24px 20px;
                font-size: 15px;
            }
            .article-cover {
                aspect-ratio: 16/10;
                border-radius: var(--r-md);
            }
            .category-guide {
                padding: 40px 0;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .guide-card {
                padding: 22px;
            }
            .faq-section {
                padding: 40px 0;
            }
            .faq-question {
                padding: 16px;
            }
            .faq-question h3 {
                font-size: 14px;
            }
            .faq-answer-inner {
                padding: 0 16px 18px 60px;
            }
            .cta-section {
                padding: 40px 0;
            }
            .cta-box {
                flex-direction: column;
                text-align: center;
                gap: 24px;
            }
            .cta-actions {
                justify-content: center;
            }
            .cta-content h2 {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .not-found-section {
                padding: 50px 0;
            }
            .not-found-card {
                padding: 40px 24px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .breadcrumb {
                font-size: 12px;
            }
            .article-heading h1 {
                font-size: 21px;
            }
            .article-meta {
                flex-direction: column;
                gap: 6px;
            }
            .article-body {
                padding: 20px 16px;
                font-size: 15px;
            }
            .guide-card {
                padding: 18px;
                gap: 14px;
                flex-direction: column;
                align-items: flex-start;
            }
            .guide-icon {
                width: 48px;
                height: 48px;
                font-size: 20px;
            }
            .faq-icon {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
            .faq-question h3 {
                font-size: 13px;
            }
            .faq-answer-inner {
                padding: 0 14px 16px 48px;
            }
            .btn {
                padding: 11px 22px;
                font-size: 14px;
            }
            .cta-content h2 {
                font-size: 21px;
            }
            .footer-grid {
                gap: 24px;
            }
            .brand-name {
                font-size: 14px;
            }
        }

/* roulang page: category2 */
:root{
  --primary:#0f1e3c;
  --primary-2:#1a2d54;
  --accent:#2d6ff7;
  --accent-2:#5b8fff;
  --gold:#f0b90b;
  --bg:#f0f2f7;
  --card:#ffffff;
  --text:#1a1a2e;
  --text-2:#5a6478;
  --border:#e2e6ef;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 4px 24px rgba(15,30,60,.06);
  --shadow-lg:0 12px 40px rgba(15,30,60,.12);
  --spacer:96px;
  --transition:.25s ease;
}
*,*::before,*::after{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{color:inherit;text-decoration:none}
a:hover{color:var(--accent)}
img{max-width:100%;display:block}
button{outline:none;cursor:pointer}
input::placeholder{color:#9aa3b5}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.app-shell{display:flex;min-height:100vh;background:var(--bg)}
.sidebar{width:270px;min-height:100vh;background:linear-gradient(180deg,#0f1e3c 0%,#16294d 100%);position:fixed;left:0;top:0;bottom:0;z-index:1200;padding:28px 20px;overflow-y:auto;box-shadow:4px 0 30px rgba(0,0,0,.08)}
.sidebar-brand{display:flex;align-items:center;gap:12px;padding:12px 10px 26px;border-bottom:1px solid rgba(255,255,255,.08);margin-bottom:20px}
.brand-icon{width:42px;height:42px;background:linear-gradient(135deg,var(--gold),#f7c948);border-radius:12px;display:flex;align-items:center;justify-content:center;color:#0f1e3c;font-size:18px;box-shadow:0 4px 16px rgba(240,185,11,.3)}
.brand-name{font-size:16px;font-weight:700;color:#fff;line-height:1.2;display:flex;flex-direction:column}
.brand-sub{font-size:11px;font-weight:400;color:rgba(255,255,255,.55);letter-spacing:1px}
.nav-section-title{font-size:11px;text-transform:uppercase;letter-spacing:2px;color:rgba(255,255,255,.35);padding:0 10px;margin-bottom:10px;font-weight:600}
.sidebar-nav{display:flex;flex-direction:column;gap:6px}
.nav-link{display:flex;align-items:center;gap:12px;padding:13px 16px;border-radius:12px;color:rgba(255,255,255,.72);font-size:14px;font-weight:500;transition:all var(--transition)}
.nav-link i{width:20px;text-align:center;font-size:15px;color:rgba(255,255,255,.5)}
.nav-link:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-link:hover i{color:var(--gold)}
.nav-link.active{background:linear-gradient(135deg,rgba(45,111,247,.25),rgba(45,111,247,.08));color:#fff;border-left:3px solid var(--gold)}
.nav-link.active i{color:var(--gold)}
.sidebar-foot{position:absolute;bottom:24px;left:20px;right:20px;padding-top:16px;border-top:1px solid rgba(255,255,255,.08)}
.sidebar-foot p{font-size:11px;color:rgba(255,255,255,.35);line-height:1.6}
.main-content{flex:1;margin-left:270px;min-width:0}
.main-wrap{max-width:1280px;margin:0 auto;padding:0 32px}
.mobile-toggle{display:none;position:fixed;top:14px;left:14px;z-index:1300;background:var(--primary);color:#fff;border:none;border-radius:10px;width:42px;height:42px;font-size:16px;box-shadow:0 4px 16px rgba(0,0,0,.15)}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:1190}

/* Hero Banner */
.page-hero{position:relative;padding:88px 0 64px;background:linear-gradient(120deg,var(--primary) 0%,var(--primary-2) 60%,var(--accent) 100%);overflow:hidden}
.page-hero::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:.3;mix-blend-mode:overlay}
.page-hero::after{content:'';position:absolute;top:-50%;right:-15%;width:400px;height:400px;background:radial-gradient(circle,rgba(240,185,11,.25),transparent 70%);pointer-events:none}
.hero-inner{position:relative;z-index:2;max-width:860px}
.hero-breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.6);margin-bottom:18px}
.hero-breadcrumb a{color:rgba(255,255,255,.75);transition:color var(--transition)}
.hero-breadcrumb a:hover{color:var(--gold)}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(240,185,11,.15);border:1px solid rgba(240,185,11,.35);color:var(--gold);font-size:12px;font-weight:600;padding:6px 16px;border-radius:30px;margin-bottom:20px;letter-spacing:1px}
.hero-badge i{font-size:13px}
.page-hero h1{font-size:44px;line-height:1.25;font-weight:800;color:#fff;margin-bottom:16px}
.page-hero h1 span{color:var(--gold)}
.page-hero p{font-size:18px;color:rgba(255,255,255,.8);max-width:680px;line-height:1.7;margin-bottom:28px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:10px;font-size:14px;font-weight:600;border:none;transition:all var(--transition);cursor:pointer}
.btn-primary{background:var(--gold);color:#0f1e3c;box-shadow:0 4px 18px rgba(240,185,11,.35)}
.btn-primary:hover{background:#f7c948;transform:translateY(-2px);box-shadow:0 8px 24px rgba(240,185,11,.45);color:#0f1e3c}
.btn-outline{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.45)}
.btn-outline:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff;transform:translateY(-2px)}

/* Section spacing */
.section{padding:var(--spacer) 0}
.section-header{text-align:center;max-width:700px;margin:0 auto 48px}
.section-tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;color:var(--accent);background:rgba(45,111,247,.08);padding:6px 16px;border-radius:30px;margin-bottom:14px;letter-spacing:1px}
.section-tag i{font-size:13px}
.section-header h2{font-size:34px;font-weight:800;color:var(--text);line-height:1.3;margin-bottom:10px}
.section-header p{font-size:16px;color:var(--text-2);line-height:1.7}

/* Stats */
.stats-section{background:var(--card);border-bottom:1px solid var(--border)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:50px 0}
.stat-item{text-align:center;padding:24px 18px;background:var(--bg);border-radius:var(--radius);border:1px solid var(--border);transition:all var(--transition)}
.stat-item:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.stat-num{font-size:40px;font-weight:800;color:var(--primary);line-height:1.2}
.stat-num span{font-size:16px;font-weight:600;color:var(--accent)}
.stat-label{font-size:14px;color:var(--text-2);margin-top:6px}

/* Feature Cards */
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.feature-card{background:var(--card);border-radius:var(--radius);border:1px solid var(--border);overflow:hidden;transition:all var(--transition);display:flex;flex-direction:column}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.feature-card-img{height:200px;overflow:hidden;position:relative}
.feature-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.feature-card:hover .feature-card-img img{transform:scale(1.05)}
.feature-card-img::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 30%,rgba(15,30,60,.25));}
.feature-card-body{padding:26px 28px 30px;flex:1}
.feature-icon{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,rgba(45,111,247,.15),rgba(45,111,247,.05));display:flex;align-items:center;justify-content:center;color:var(--accent);font-size:19px;margin-bottom:16px}
.feature-card h3{font-size:19px;font-weight:700;color:var(--text);margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--text-2);line-height:1.75;margin-bottom:12px}

/* Process Steps */
.process-section{background:var(--card);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.process-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.process-step{position:relative;text-align:center;padding:36px 24px;background:var(--bg);border-radius:var(--radius);border:1px solid var(--border);transition:all var(--transition)}
.process-step:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.step-num{width:42px;height:42px;border-radius:50%;background:var(--primary);color:var(--gold);font-size:16px;font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto 14px;box-shadow:0 4px 12px rgba(15,30,60,.2)}
.step-num.done{background:var(--accent);color:#fff}
.step-num.gold{background:var(--gold);color:#0f1e3c}
.process-step h3{font-size:17px;font-weight:700;margin-bottom:8px;color:var(--text)}
.process-step p{font-size:13px;color:var(--text-2);line-height:1.7}

/* Guide cards */
.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.guide-card{display:flex;background:var(--card);border-radius:var(--radius);border:1px solid var(--border);padding:0;overflow:hidden;transition:all var(--transition)}
.guide-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.guide-card-img{width:140px;min-height:120px;background:var(--primary);display:flex;align-items:center;justify-content:center;flex-shrink:0;position:relative;overflow:hidden}
.guide-card-img img{width:100%;height:100%;object-fit:cover;opacity:.75;transition:opacity .3s}
.guide-card:hover .guide-card-img img{opacity:1}
.guide-card-img i{position:absolute;font-size:26px;color:#fff;text-shadow:0 2px 8px rgba(0,0,0,.25)}
.guide-card-body{padding:20px 22px;flex:1}
.guide-card-body h3{font-size:16px;font-weight:700;margin-bottom:6px;color:var(--text);line-height:1.4}
.guide-card-body p{font-size:13px;color:var(--text-2);line-height:1.7;margin-bottom:10px}
.guide-meta{display:flex;align-items:center;gap:14px;font-size:12px;color:#9aa3b5}
.guide-meta i{font-size:12px;color:var(--accent)}

/* FAQ */
.faq-section{background:var(--card)}
.faq-list{max-width:760px;margin:0 auto}
.faq-item{background:var(--bg);border:1px solid var(--border);border-radius:14px;margin-bottom:14px;overflow:hidden;transition:box-shadow var(--transition)}
.faq-item summary{cursor:pointer;padding:22px 26px;font-size:16px;font-weight:600;color:var(--text);display:flex;justify-content:space-between;align-items:center;gap:16px;list-style:none;transition:background var(--transition)}
.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:13px;color:var(--accent);transition:transform var(--transition);flex-shrink:0}
.faq-item[open] summary::after{transform:rotate(180deg)}
.faq-item[open] summary{border-bottom:1px solid var(--border)}
.faq-item[open] .faq-answer{border-top:1px solid transparent}
.faq-answer{padding:0 26px 22px;color:var(--text-2);font-size:14px;line-height:1.8}

/* CTA */
.cta-section{padding:60px 0;position:relative}
.cta-box{background:linear-gradient(120deg,var(--primary),var(--primary-2) 60%,var(--accent));border-radius:24px;padding:56px 48px;text-align:center;position:relative;overflow:hidden}
.cta-box::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;opacity:.15;mix-blend-mode:overlay}
.cta-box h2{color:#fff;font-size:32px;font-weight:800;margin-bottom:12px;position:relative;z-index:1}
.cta-box p{color:rgba(255,255,255,.78);font-size:16px;margin-bottom:26px;position:relative;z-index:1}
.cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;position:relative;z-index:1}

/* Footer */
.site-footer{background:var(--primary);color:rgba(255,255,255,.7);padding:64px 0 20px;margin-left:270px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:44px}
.footer-brand a{display:flex;align-items:center;gap:12px;color:#fff;font-size:18px;font-weight:700;margin-bottom:14px}
.footer-brand p{font-size:13px;line-height:1.8;opacity:.65}
.footer-title{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-links{list-style:none}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:13px;color:rgba(255,255,255,.6);transition:all var(--transition);display:inline-flex;align-items:center;gap:6px}
.footer-links a i{font-size:10px;color:var(--gold);transition:transform var(--transition)}
.footer-links a:hover{color:var(--gold)}
.footer-links a:hover i{transform:translateX(3px)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:22px;text-align:center;font-size:13px;color:rgba(255,255,255,.45)}
.footer-bottom a{color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:var(--gold)}

/* Mobile menu */
.mobile-menu-btn{display:none}

@media screen and (max-width:1024px){
  .sidebar{transform:translateX(-105%);transition:transform .3s ease;box-shadow:none}
  .sidebar.open{transform:translateX(0);box-shadow:0 0 60px rgba(0,0,0,.3)}
  .sidebar-overlay.show{display:block}
  .main-content{margin-left:0}
  .site-footer{margin-left:0}
  .mobile-menu-btn{display:flex;align-items:center;justify-content:center;position:fixed;top:16px;left:16px;z-index:1205;width:44px;height:44px;background:var(--primary);color:#fff;border:none;border-radius:12px;box-shadow:0 4px 18px rgba(0,0,0,.15);font-size:16px;cursor:pointer}
  .main-wrap{padding:0 20px}
}

@media screen and (max-width:768px){
  :root{--spacer:64px}
  .page-hero h1{font-size:30px}
  .page-hero p{font-size:15px}
  .hero-btns .btn{padding:11px 20px;font-size:13px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .stat-num{font-size:28px}
  .feature-grid,.guide-grid{grid-template-columns:1fr}
  .process-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .cta-box{padding:40px 24px}
  .cta-box h2{font-size:24px}
  .section-header h2{font-size:24px}
  .section-header p{font-size:14px}
}

@media screen and (max-width:520px){
  .page-hero{padding:110px 0 46px;text-align:left}
  .page-hero h1{font-size:25px;line-height:1.35}
  .stats-grid{grid-template-columns:1fr 1fr;gap:10px}
  .stat-item{padding:16px 10px}
  .stat-num{font-size:22px}
  .footer-grid{grid-template-columns:1fr}
  .main-wrap{padding:0 16px}
  .guide-card{flex-direction:column}
  .guide-card-img{width:100%;height:110px}
}