/* roulang page: index */
/* ===== 1. 设计变量 ===== */
:root {
  --primary: #1a1a3e;
  --primary-dark: #0b0f1f;
  --primary-light: #2a2a5e;
  --accent: #6c5ce7;
  --accent-light: #a29bfe;
  --accent-dark: #5040c8;
  --gold: #f5a623;
  --bg: #f5f6fa;
  --bg-alt: #ffffff;
  --text: #1a1a3e;
  --text-muted: #6b7280;
  --text-inverse: #f0f2fa;
  --border: #e6e8f0;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 12px rgba(26, 26, 62, 0.06);
  --shadow-md: 0 8px 32px rgba(26, 26, 62, 0.10);
  --shadow-lg: 0 16px 48px rgba(26, 26, 62, 0.16);
  --transition: all 0.3s ease;
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* ===== 2. Reset与基础 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}
img { max-width: 100%; display: block; height: auto; }
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-dark); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; }

/* ===== 3. 容器 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}
.section-padding { padding: 96px 0; }

/* ===== 4. 头部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.logo {
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo i {
  color: var(--accent);
  font-size: 1.4rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
}
.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 8px 20px;
  border-radius: 50px;
  transition: var(--transition);
  position: relative;
}
.nav-link:hover {
  color: var(--primary);
  background: rgba(108, 92, 231, 0.08);
}
.nav-link.active {
  color: var(--accent);
  background: rgba(108, 92, 231, 0.10);
  font-weight: 600;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-box {
  display: flex;
  align-items: center;
  background: #f3f4f8;
  border: 1px solid transparent;
  border-radius: 50px;
  padding: 6px 16px;
  gap: 8px;
  min-width: 180px;
  transition: var(--transition);
}
.search-box:hover {
  border-color: var(--accent-light);
  background: #fff;
  box-shadow: 0 4px 14px rgba(108, 92, 231, 0.1);
}
.search-box i {
  color: var(--text-muted);
  font-size: 0.85rem;
}
.search-box input {
  border: none;
  outline: none;
  background: transparent;
  font-size: 0.85rem;
  width: 100%;
  color: var(--text);
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 50px;
  border: none;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
}
.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(108, 92, 231, 0.4);
  color: #fff;
}
.cta-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(108, 92, 231, 0.3);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== 5. Hero ===== */
.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  background: var(--primary-dark);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.35;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(11, 15, 31, 0.95) 0%, rgba(11, 15, 31, 0.7) 50%, rgba(11, 15, 31, 0.4) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 80px 0;
  max-width: 680px;
}
.hero-tagline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(108, 92, 231, 0.18);
  border: 1px solid rgba(108, 92, 231, 0.4);
  color: var(--accent-light);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 24px;
}
.hero-tagline i { font-size: 0.75rem; }
.hero h1 {
  font-size: 3.2rem;
  line-height: 1.15;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero h1 .highlight {
  background: linear-gradient(135deg, var(--gold), #ffc555);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-desc {
  font-size: 1.15rem;
  line-height: 1.8;
  color: rgba(240, 242, 250, 0.8);
  margin-bottom: 36px;
  max-width: 520px;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  padding: 14px 36px;
  border-radius: 50px;
  transition: var(--transition);
  box-shadow: 0 8px 24px rgba(108, 92, 231, 0.35);
}
.hero-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(108, 92, 231, 0.45);
  color: #fff;
}
.hero-btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  font-size: 1rem;
  font-weight: 500;
  padding: 14px 36px;
  border-radius: 50px;
  transition: var(--transition);
}
.hero-btn-ghost:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}
.hero-trust {
  display: flex;
  gap: 24px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}
.hero-trust span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: rgba(240, 242, 250, 0.7);
}
.hero-trust i { color: var(--gold); }

/* ===== 6. 数据统计条 ===== */
.stats-bar {
  background: var(--primary-dark);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 40px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.stat-item {
  text-align: center;
  position: relative;
}
.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -16px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
}
.stat-num {
  font-size: 2.4rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.stat-num span {
  background: linear-gradient(135deg, var(--gold), #ffc555);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-label {
  font-size: 0.9rem;
  color: rgba(240, 242, 250, 0.65);
  margin-top: 8px;
}

/* ===== 7. 核心特色 ===== */
.features-section {
  background: var(--bg);
}
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}
.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  background: rgba(108, 92, 231, 0.1);
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 16px;
}
.section-header h2 {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.section-header p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  padding: 40px 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(108, 92, 231, 0.3);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.12), rgba(108, 92, 231, 0.05));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 24px;
  transition: var(--transition);
}
.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  transform: scale(1.05);
}
.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}
.feature-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ===== 8. 分类入口 ===== */
.categories-section {
  background: var(--bg-alt);
}
.categories-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.category-card {
  display: block;
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(108, 92, 231, 0.3);
  color: inherit;
}
.category-img {
  position: relative;
  height: 240px;
  overflow: hidden;
}
.category-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.category-card:hover .category-img img {
  transform: scale(1.05);
}
.category-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(11, 15, 31, 0.6) 100%);
}
.category-badge {
  position: absolute;
  top: 20px;
  left: 20px;
  background: rgba(11, 15, 31, 0.7);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 50px;
}
.category-info {
  padding: 32px 28px;
}
.category-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}
.category-info p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}
.category-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent);
  transition: var(--transition);
}
.category-link i {
  transition: transform 0.3s ease;
}
.category-card:hover .category-link {
  gap: 12px;
}
.category-card:hover .category-link i {
  transform: translateX(4px);
}

/* ===== 9. 资讯列表 ===== */
.news-section {
  background: var(--bg);
}
.news-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 40px;
  align-items: start;
}
.news-feature {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: sticky;
  top: 100px;
  box-shadow: var(--shadow-md);
}
.news-feature img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.news-item {
  background: var(--bg-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  padding: 28px;
  transition: var(--transition);
}
.news-item:hover {
  box-shadow: var(--shadow-sm);
  border-color: rgba(108, 92, 231, 0.25);
  transform: translateX(4px);
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
}
.news-category {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(108, 92, 231, 0.1);
  padding: 4px 14px;
  border-radius: 50px;
}
.news-date {
  font-size: 0.82rem;
  color: var(--text-muted);
}
.news-item h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
}
.news-item h3 a {
  color: var(--text);
  transition: var(--transition);
}
.news-item h3 a:hover {
  color: var(--accent);
}
.news-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.empty-tip {
  text-align: center;
  color: var(--text-muted);
  background: var(--bg-alt);
  border-radius: var(--radius-md);
  border: 1px dashed var(--border);
  padding: 50px 20px;
  font-size: 1rem;
}

/* ===== 10. 使用流程 ===== */
.process-section {
  position: relative;
  background: var(--primary-dark);
  padding: 96px 0;
  overflow: hidden;
}
.process-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.12;
}
.process-section .container {
  position: relative;
  z-index: 2;
}
.process-section .section-header h2 {
  color: #fff;
}
.process-section .section-header p {
  color: rgba(240, 242, 250, 0.6);
}
.process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 64px;
}
.process-step {
  text-align: center;
  padding: 48px 32px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}
.process-step:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(108, 92, 231, 0.4);
  transform: translateY(-4px);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 24px;
  box-shadow: 0 8px 24px rgba(108, 92, 231, 0.3);
}
.process-step h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.process-step p {
  font-size: 0.9rem;
  color: rgba(240, 242, 250, 0.6);
  line-height: 1.7;
}

/* ===== 11. FAQ ===== */
.faq-section {
  background: var(--bg-alt);
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover {
  border-color: rgba(108, 92, 231, 0.3);
  box-shadow: var(--shadow-sm);
}
.faq-item details > summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 28px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: var(--transition);
  position: relative;
}
.faq-item details > summary::-webkit-details-marker {
  display: none;
}
.faq-item details > summary::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--accent);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item details[open] > summary::after {
  transform: rotate(45deg);
}
.faq-item details > summary:hover {
  color: var(--accent);
}
.faq-item details > p {
  padding: 0 28px 24px;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ===== 12. CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
  padding: 88px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
}
.cta-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
  margin: 0 auto;
}
.cta-section h2 {
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.cta-section p {
  font-size: 1.05rem;
  color: rgba(240, 242, 250, 0.7);
  line-height: 1.8;
  margin-bottom: 40px;
}
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-btn-gold {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--gold), #ffc555);
  color: #1a1a3e;
  font-size: 1rem;
  font-weight: 700;
  padding: 14px 40px;
  border-radius: 50px;
  transition: var(--transition);
  box-shadow: 0 8px 24px rgba(245, 166, 35, 0.3);
}
.cta-btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(245, 166, 35, 0.45);
  color: #1a1a3e;
}
.cta-btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.4);
  color: #fff;
  font-size: 1rem;
  font-weight: 500;
  padding: 14px 40px;
  border-radius: 50px;
  transition: var(--transition);
}
.cta-btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

/* ===== 13. 页脚 ===== */
.site-footer {
  background: var(--primary-dark);
  padding: 72px 0 0;
  color: rgba(240, 242, 250, 0.7);
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand .logo {
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.8;
  max-width: 300px;
  margin-top: 16px;
}
.footer-column h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}
.footer-column ul li {
  margin-bottom: 10px;
}
.footer-column ul li a {
  font-size: 0.9rem;
  color: rgba(240, 242, 250, 0.6);
  transition: var(--transition);
}
.footer-column ul li a:hover {
  color: var(--accent-light);
  padding-left: 4px;
}
.footer-bottom {
  padding: 28px 0;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(240, 242, 250, 0.45);
}
.footer-bottom a {
  color: rgba(240, 242, 250, 0.6);
}
.footer-bottom a:hover {
  color: var(--accent-light);
}
:focus-visible {
  outline: 3px solid var(--accent-light);
  outline-offset: 2px;
}

/* ===== 14. 响应式 ===== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .news-layout {
    grid-template-columns: 1fr;
  }
  .news-feature {
    position: static;
    max-height: 340px;
  }
  .news-feature img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 24px;
  }
  .section-padding {
    padding: 72px 0;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    z-index: 99;
  }
  .nav-menu.mobile-open {
    transform: translateY(0);
  }
  .nav-link {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
  }
  .nav-link.active {
    background: rgba(108, 92, 231, 0.1);
  }
  .nav-link.active::after {
    display: none;
  }
  .header-actions .search-box {
    display: none;
  }
  .hero {
    min-height: auto;
    padding: 60px 0;
  }
  .hero h1 {
    font-size: 2.2rem;
  }
  .hero-desc {
    font-size: 1rem;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
  .stat-item:nth-child(2)::after {
    display: none;
  }
  .categories-grid {
    grid-template-columns: 1fr;
  }
  .process-steps {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .cta-section {
    padding: 64px 0;
  }
  .cta-section h2 {
    font-size: 1.7rem;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 20px;
  }
  .header-inner {
    height: 64px;
  }
  .nav-menu {
    top: 64px;
  }
  .logo {
    font-size: 1rem;
  }
  .logo i {
    font-size: 1.1rem;
  }
  .cta-btn {
    padding: 8px 18px;
    font-size: 0.85rem;
  }
  .hero h1 {
    font-size: 1.8rem;
  }
  .hero-trust {
    flex-wrap: wrap;
    gap: 16px;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .stat-num {
    font-size: 1.8rem;
  }
  .section-header h2 {
    font-size: 1.6rem;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .category-img {
    height: 180px;
  }
  .category-info {
    padding: 24px 20px;
  }
  .news-item {
    padding: 20px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    padding: 20px 0;
    font-size: 0.8rem;
  }
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
  .cta-btn-gold,
  .cta-btn-outline {
    width: 100%;
    justify-content: center;
  }
}

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --primary-light: #eff6ff;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --dark: #0b1530;
            --dark-2: #111c38;
            --bg: #f6f8fc;
            --surface: #ffffff;
            --text: #1e293b;
            --text-muted: #64748b;
            --border: #e4e9f2;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 10px 30px rgba(2, 12, 40, 0.07);
            --shadow-lg: 0 22px 60px rgba(2, 12, 40, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container: 1200px;
            --section-space: 84px;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

        button,
        input {
            font: inherit;
            border: none;
            background: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ---------------- Header ---------------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(228, 233, 242, 0.8);
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(2, 12, 40, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            height: 72px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.22rem;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: 0.3px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo i {
            color: var(--primary);
            font-size: 1.35rem;
            transition: var(--transition);
        }

        .logo:hover i {
            transform: rotate(-8deg) scale(1.05);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 34px;
            margin: 0 auto;
        }

        .nav-link {
            position: relative;
            font-size: 0.96rem;
            font-weight: 500;
            color: var(--text-muted);
            padding: 8px 2px;
            letter-spacing: 0.2px;
            transition: var(--transition);
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2.5px;
            border-radius: 2px;
            background: var(--primary);
            transition: var(--transition);
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link.active::after {
            width: 100%;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 40px;
            padding: 8px 16px;
            width: 210px;
            transition: var(--transition);
        }

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

        .search-box i {
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .search-box input {
            width: 100%;
            font-size: 0.87rem;
            color: var(--text);
            background: transparent;
        }

        .search-box input::placeholder {
            color: #9aa7b8;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-size: 0.92rem;
            font-weight: 600;
            padding: 9px 20px;
            border-radius: 40px;
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.25);
            transition: var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }

        .cta-btn:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(37, 99, 235, 0.35);
        }

        .cta-btn:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            background: var(--bg);
            cursor: pointer;
        }

        .nav-toggle span {
            width: 20px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* ---------------- Hero ---------------- */
        .category-hero {
            position: relative;
            background: linear-gradient(135deg, rgba(8, 18, 48, 0.96), rgba(18, 30, 68, 0.88)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 92px 0 96px;
            color: #fff;
            overflow: hidden;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            right: -120px;
            top: -120px;
            width: 380px;
            height: 380px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.35), transparent 60%);
            border-radius: 50%;
        }

        .category-hero::after {
            content: "";
            position: absolute;
            left: -80px;
            bottom: -120px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.2), transparent 60%);
            border-radius: 50%;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 60px;
            align-items: center;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 22px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
        }

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

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

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(37, 99, 235, 0.18);
            border: 1px solid rgba(37, 99, 235, 0.35);
            color: #93c5fd;
            font-size: 0.82rem;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 40px;
            letter-spacing: 0.4px;
            margin-bottom: 22px;
            text-transform: uppercase;
        }

        .hero-title {
            font-size: 2.8rem;
            line-height: 1.25;
            font-weight: 800;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }

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

        .hero-desc {
            font-size: 1.08rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 30px;
            max-width: 520px;
        }

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

        .hero-btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: var(--dark);
            font-weight: 700;
            font-size: 0.96rem;
            padding: 12px 26px;
            border-radius: 40px;
            box-shadow: 0 8px 20px rgba(245, 158, 11, 0.35);
            transition: var(--transition);
        }

        .hero-btn-primary:hover {
            background: #fbbf24;
            color: var(--dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(245, 158, 11, 0.45);
        }

        .hero-btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1.5px solid rgba(255, 255, 255, 0.35);
            color: #fff;
            font-weight: 500;
            font-size: 0.96rem;
            padding: 12px 26px;
            border-radius: 40px;
            transition: var(--transition);
        }

        .hero-btn-ghost:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        .hero-score-card {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.14);
            backdrop-filter: blur(16px);
            border-radius: 22px;
            padding: 32px 34px;
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.25);
        }

        .score-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 26px;
        }

        .score-number {
            font-size: 3.4rem;
            font-weight: 800;
            line-height: 1;
            color: #fff;
        }

        .score-number small {
            font-size: 1.2rem;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.5);
            margin-left: 4px;
        }

        .score-label {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.7);
            text-align: right;
            line-height: 1.5;
        }

        .score-bars {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .score-bar-item {
            display: flex;
            flex-direction: column;
            gap: 5px;
        }

        .score-bar-meta {
            display: flex;
            justify-content: space-between;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.75);
        }

        .score-bar-meta span:last-child {
            font-weight: 700;
            color: #fff;
        }

        .bar-track {
            height: 6px;
            background: rgba(255, 255, 255, 0.14);
            border-radius: 4px;
            overflow: hidden;
        }

        .bar-fill {
            height: 100%;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--primary), #60a5fa);
            width: 0;
            transition: width 1.2s ease;
        }

        .bar-fill.accent {
            background: linear-gradient(90deg, var(--accent), #fcd34d);
        }

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

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

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

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

        .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 30px;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
        }

        .section-head.dark .section-tag {
            background: rgba(37, 99, 235, 0.18);
            color: #93c5fd;
        }

        .section-head.dark {
            color: #fff;
        }

        .section-head.dark .section-desc {
            color: rgba(255, 255, 255, 0.75);
        }

        .section-title {
            font-size: 2.1rem;
            font-weight: 800;
            line-height: 1.35;
            color: var(--text);
            letter-spacing: -0.3px;
        }

        .section-head.dark .section-title {
            color: #fff;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-muted);
            margin-top: 12px;
        }

        .section-head.dark .section-desc {
            color: rgba(255, 255, 255, 0.75);
        }

        /* ---------------- Feature Cards ---------------- */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        .feature-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

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

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

        .feature-card:hover::before {
            transform: scaleX(1);
        }

        .feature-icon {
            width: 52px;
            height: 52px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 20px;
            transition: var(--transition);
        }

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

        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ---------------- Review Cards ---------------- */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

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

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

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

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

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

        .review-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(2, 12, 40, 0.4), transparent 50%);
        }

        .review-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(6px);
            color: var(--dark);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 30px;
            letter-spacing: 0.3px;
        }

        .review-score {
            position: absolute;
            right: 14px;
            bottom: 12px;
            z-index: 2;
            background: var(--accent);
            color: var(--dark);
            font-size: 1.1rem;
            font-weight: 800;
            padding: 2px 12px;
            border-radius: 30px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        }

        .review-content {
            padding: 22px 22px 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            flex: 1;
        }

        .review-content h3 {
            font-size: 1.04rem;
            font-weight: 700;
            line-height: 1.45;
            color: var(--text);
        }

        .review-content p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
        }

        .review-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border);
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .review-meta a {
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .review-meta a:hover {
            gap: 10px;
        }

        /* ---------------- Score System ---------------- */
        .score-section {
            position: relative;
            background: linear-gradient(135deg, rgba(9, 18, 48, 0.97), rgba(16, 28, 64, 0.94)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            padding: 90px 0;
        }

        .score-panel {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 56px;
            align-items: center;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 24px;
            padding: 44px 48px;
            backdrop-filter: blur(12px);
        }

        .panel-intro h3 {
            font-size: 1.6rem;
            font-weight: 800;
            line-height: 1.4;
            margin-bottom: 16px;
        }

        .panel-intro p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.96rem;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .panel-intro .score-note {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(245, 158, 11, 0.15);
            border: 1px solid rgba(245, 158, 11, 0.3);
            color: #fcd34d;
            font-size: 0.84rem;
            padding: 8px 16px;
            border-radius: 30px;
        }

        .score-chart {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .chart-item .chart-label {
            display: flex;
            justify-content: space-between;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 6px;
        }

        .chart-item .chart-label span:last-child {
            font-weight: 700;
            color: var(--accent);
        }

        .chart-track {
            height: 8px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 6px;
            overflow: hidden;
        }

        .chart-fill {
            height: 100%;
            border-radius: 6px;
            background: linear-gradient(90deg, var(--accent), #fcd34d);
            width: 0;
            transition: width 1s ease;
        }

        /* ---------------- Steps ---------------- */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .step-item {
            position: relative;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 28px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

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

        .step-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-light);
            line-height: 1;
            margin-bottom: 14px;
            background: -webkit-linear-gradient(135deg, var(--primary), #93c5fd);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .step-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ---------------- FAQ ---------------- */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
            overflow: hidden;
        }

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

        .faq-item summary {
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 22px 26px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            transition: var(--transition);
        }

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

        .faq-item summary:hover {
            color: var(--primary);
        }

        .faq-item summary i {
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item[open] summary i {
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            padding: 0 26px 24px;
            font-size: 0.94rem;
            color: var(--text-muted);
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 18px;
            margin-top: 0;
        }

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

        .cta-inner {
            position: relative;
            background: linear-gradient(120deg, var(--primary), var(--primary-dark));
            border-radius: 28px;
            padding: 60px 56px;
            overflow: hidden;
            box-shadow: 0 24px 60px rgba(37, 99, 235, 0.3);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
        }

        .cta-inner::before {
            content: "";
            position: absolute;
            right: -80px;
            top: -80px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.18), transparent 60%);
            border-radius: 50%;
        }

        .cta-inner::after {
            content: "";
            position: absolute;
            left: 30%;
            bottom: -100px;
            width: 180px;
            height: 180px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.25), transparent 60%);
            border-radius: 50%;
        }

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

        .cta-content h2 {
            font-size: 1.8rem;
            font-weight: 800;
            line-height: 1.4;
            margin-bottom: 12px;
        }

        .cta-content p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 520px;
        }

        .cta-actions {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            gap: 12px;
            flex-shrink: 0;
        }

        .cta-btn-solid {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            padding: 14px 30px;
            border-radius: 40px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
            transition: var(--transition);
            font-size: 0.96rem;
        }

        .cta-btn-solid:hover {
            background: var(--accent);
            color: var(--dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18);
        }

        .cta-btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            font-weight: 600;
            padding: 14px 30px;
            border-radius: 40px;
            transition: var(--transition);
            font-size: 0.96rem;
        }

        .cta-btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            transform: translateY(-2px);
        }

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

        .footer-top {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand .logo i {
            color: var(--accent);
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.8;
            max-width: 300px;
        }

        .footer-column h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-column ul {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-column ul a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }

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

        .footer-bottom {
            padding: 24px 0 28px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }

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

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

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

            .search-box {
                width: 160px;
            }

            .nav-menu {
                gap: 20px;
            }

            .hero-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero-score-card {
                max-width: 480px;
            }

            .score-panel {
                grid-template-columns: 1fr;
                padding: 36px;
                gap: 36px;
            }

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

            .cta-inner {
                flex-direction: column;
                align-items: flex-start;
                padding: 44px 36px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-space: 64px;
            }

            .header-inner {
                flex-wrap: wrap;
                height: auto;
                padding: 14px 0;
                position: relative;
            }

            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                background: var(--surface);
                border: 1px solid var(--border);
                border-radius: var(--radius);
                padding: 12px 18px;
                margin-top: 12px;
                box-shadow: var(--shadow-lg);
            }

            .nav-menu.active {
                display: flex;
            }

            .nav-menu .nav-link {
                width: 100%;
                padding: 12px 0;
                border-bottom: 1px solid var(--border);
            }

            .nav-menu .nav-link:last-child {
                border-bottom: none;
            }

            .nav-toggle {
                display: flex;
            }

            .search-box {
                width: 100%;
                order: 3;
                margin-top: 12px;
            }

            .header-actions {
                flex: 1;
                justify-content: flex-end;
            }

            .hero-title {
                font-size: 2.1rem;
            }

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

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

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

            .footer-brand {
                grid-column: 1 / -1;
            }

            .cta-inner {
                padding: 36px 24px;
            }

            .cta-actions {
                width: 100%;
            }

            .cta-btn-solid,
            .cta-btn-outline {
                width: 100%;
            }

            .step-item {
                padding: 26px 22px;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                flex-direction: row;
            }

            .header-actions .cta-btn {
                display: none;
            }

            .hero-title {
                font-size: 1.7rem;
            }

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

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

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

            .footer-brand {
                grid-column: auto;
            }

            .score-panel {
                padding: 28px 22px;
            }

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

            .cta-content h2 {
                font-size: 1.4rem;
            }
        }

/* roulang page: article */
:root {
  --primary: #4f46e5;
  --primary-light: #818cf8;
  --primary-dark: #4338ca;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --bg-dark: #0f172a;
  --bg-dark-soft: #1e293b;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border-color: #e2e8f0;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
  --container-w: 1200px;
  --space-xl: 80px;
  --space-lg: 60px;
  --space-md: 40px;
  --space-sm: 24px;
  --transition: 0.25s 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", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background: var(--bg-light);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
input, button { font-family: inherit; font-size: inherit; outline: none; border: none; }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.logo i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  border-radius: 10px;
  font-size: 1rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: center;
}

.nav-link {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition);
}

.nav-link:hover { color: var(--primary); background: rgba(79, 70, 229, 0.08); }
.nav-link.active { color: var(--primary); background: rgba(79, 70, 229, 0.1); font-weight: 600; }

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

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-light);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  padding: 8px 14px;
  min-width: 200px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-box:focus-within {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
  background: #fff;
}

.search-box i:first-child { color: var(--text-light); font-size: 0.85rem; }
.search-box input { border: none; background: transparent; flex: 1; font-size: 0.88rem; color: var(--text-main); }
.search-box input::placeholder { color: var(--text-light); }

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 9px 20px;
  border-radius: 999px;
  transition: all var(--transition);
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
}

.cta-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: transparent;
  cursor: pointer;
  border-radius: 10px;
}

.nav-toggle:hover { background: rgba(0,0,0,0.04); }

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ========== Article Hero ========== */
.article-hero {
  position: relative;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  padding: 80px 0 64px;
  color: #fff;
  border-bottom: 1px solid var(--border-color);
}

.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.82), rgba(15, 23, 42, 0.66));
}

.article-hero .container {
  position: relative;
  z-index: 2;
  max-width: 900px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.breadcrumb a { transition: color var(--transition); }
.breadcrumb a:hover { color: var(--accent-light); }
.breadcrumb i { font-size: 0.7rem; color: rgba(255,255,255,0.5); }

.article-hero h1 {
  font-size: 2.4rem;
  line-height: 1.3;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.article-excerpt {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 720px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.85);
}

.article-meta i { margin-right: 6px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* ========== Article Layout ========== */
.article-section { padding: 64px 0; }

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 40px;
  align-items: start;
}

.article-content-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.article-cover-img {
  width: 100%;
  height: 380px;
  object-fit: cover;
}

.article-body {
  padding: 40px 44px;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--text-main);
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 32px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  line-height: 1.4;
}

.article-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 24px 0 12px;
  color: var(--text-main);
}

.article-body p { margin-bottom: 16px; }
.article-body ul, .article-body ol { margin: 0 0 16px 24px; list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 6px; }
.article-body blockquote {
  background: var(--bg-light);
  border-left: 4px solid var(--accent);
  padding: 16px 20px;
  margin: 20px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-muted);
  font-style: italic;
}
.article-body img { border-radius: var(--radius-md); margin: 20px 0; }
.article-body table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.article-body th, .article-body td { padding: 12px 16px; border: 1px solid var(--border-color); text-align: left; }
.article-body th { background: var(--bg-light); font-weight: 600; }
.article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }

/* ========== Sidebar ========== */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 90px;
}

.sidebar-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.sidebar-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-card h3 i { color: var(--primary); }

.info-card ul li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border-color);
  font-size: 0.9rem;
}

.info-card ul li:last-child { border-bottom: none; }
.info-card ul li span { color: var(--text-muted); flex-shrink: 0; }

.side-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.92rem;
  transition: all var(--transition);
  margin-bottom: 8px;
}

.side-link:last-child { margin-bottom: 0; }
.side-link i { color: var(--primary); width: 20px; text-align: center; }
.side-link:hover { background: rgba(79, 70, 229, 0.08); color: var(--primary); transform: translateX(4px); }

/* ========== Tags ========== */
.tags-section { padding: 0 0 60px; }

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 18px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  max-width: calc(100% - 380px);
}

.tag {
  background: var(--bg-light);
  color: var(--text-muted);
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 500;
  border: 1px solid var(--border-color);
  transition: all var(--transition);
}

.tag:hover { background: rgba(79, 70, 229, 0.08); color: var(--primary); border-color: var(--primary-light); }

/* ========== Related ========== */
.related-section {
  padding: 64px 0;
  background: var(--bg-light);
  border-top: 1px solid var(--border-color);
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 12px;
}

.section-head h2 {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.section-head .section-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 500;
  font-size: 0.9rem;
  transition: gap var(--transition);
}

.section-head .section-more:hover { gap: 10px; }

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

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

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

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

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

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

.related-cat {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(79, 70, 229, 0.9);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
}

.related-info { padding: 20px; }

.related-info h3 {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition);
}

.related-card:hover .related-info h3 { color: var(--primary); }

.related-info p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}

.related-date {
  font-size: 0.82rem;
  color: var(--text-light);
}

.related-date i { margin-right: 4px; }

/* ========== FAQ ========== */
.faq-section { padding: var(--space-xl) 0; }

.faq-section .section-head { justify-content: center; text-align: center; }
.faq-section .section-head p { color: var(--text-muted); margin-top: 6px; width: 100%; }

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.faq-item:hover { box-shadow: var(--shadow-sm); }

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: transparent;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  text-align: left;
  color: var(--text-main);
  transition: all var(--transition);
}

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

.faq-question i {
  color: var(--text-light);
  transition: transform var(--transition);
  font-size: 0.9rem;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-item.open .faq-answer { max-height: 300px; }

.faq-answer p {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

/* ========== CTA ========== */
.cta-section {
  padding: var(--space-xl) 0;
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.2), transparent 60%);
  top: -200px;
  right: -100px;
}

.cta-section::after {
  content: "";
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.15), transparent 60%);
  bottom: -150px;
  left: -100px;
}

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

.cta-box {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  color: #fff;
}

.cta-box h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.cta-box p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-light {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--text-main);
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 600;
  transition: all var(--transition);
}

.btn-light:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(255,255,255,0.2); }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  color: #fff;
  padding: 10px 26px;
  border-radius: 999px;
  font-weight: 600;
  transition: all var(--transition);
}

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

/* ========== Not Found ========== */
.not-found-section { padding: var(--space-xl) 0; }

.not-found-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 64px 40px;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.not-found-card i {
  font-size: 3.5rem;
  color: var(--primary-light);
  margin-bottom: 20px;
}

.not-found-card h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.not-found-card p {
  color: var(--text-muted);
  margin-bottom: 24px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  padding: 10px 28px;
  border-radius: 999px;
  font-weight: 600;
  transition: all var(--transition);
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4); }

/* ========== Footer ========== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .logo { color: #fff; margin-bottom: 16px; }

.footer-brand p {
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  max-width: 320px;
}

.footer-column h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
}

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

.footer-column ul li a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  transition: color var(--transition), padding-left var(--transition);
}

.footer-column ul li a:hover { color: var(--accent-light); padding-left: 4px; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.45);
}

.footer-bottom a { color: rgba(255, 255, 255, 0.6); transition: color var(--transition); }
.footer-bottom a:hover { color: var(--accent-light); }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
  .sidebar-card { flex: 1; min-width: 240px; }
  .article-tags { max-width: 100%; }
  .search-box { min-width: 140px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .header-inner { height: auto; flex-wrap: wrap; padding: 14px 0; }
  .nav-menu {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: 12px;
    margin-top: 8px;
  }
  .nav-menu.open { display: flex; }
  .header-actions { margin-left: auto; }
  .search-box { display: none; }
  .nav-toggle { display: flex; }
  .article-hero { padding: 56px 0 44px; }
  .article-hero h1 { font-size: 1.7rem; }
  .article-excerpt { font-size: 0.95rem; }
  .article-body { padding: 28px 24px; }
  .article-cover-img { height: 220px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .article-section { padding: 48px 0; }
  .faq-section, .cta-section { padding: 56px 0; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-hero h1 { font-size: 1.4rem; }
  .article-meta { gap: 12px; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-box h2 { font-size: 1.5rem; }
  .cta-buttons { flex-direction: column; align-items: stretch; }
  .btn-light, .btn-outline { justify-content: center; }
  .logo { font-size: 1rem; }
  .logo i { width: 32px; height: 32px; font-size: 0.88rem; }
  .cta-btn { padding: 8px 16px; font-size: 0.85rem; }
}

/* roulang page: category2 */
:root {
      --primary: #4f46e5;
      --primary-dark: #4338ca;
      --primary-light: #818cf8;
      --accent: #f59e0b;
      --accent-dark: #d97706;
      --dark-bg: #0f172a;
      --dark-bg-2: #1e293b;
      --light-bg: #f1f5f9;
      --white: #ffffff;
      --text: #0f172a;
      --text-muted: #64748b;
      --border: #e2e8f0;
      --radius-lg: 20px;
      --radius-md: 14px;
      --radius-sm: 8px;
      --shadow-sm: 0 2px 12px rgba(15, 23, 42, .06);
      --shadow-md: 0 8px 32px rgba(15, 23, 42, .08);
      --shadow-lg: 0 16px 48px rgba(15, 23, 42, .14);
      --header-height: 72px;
      --transition: .3s ease;
      --section-pad: 100px;
    }

    *, *::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;
      font-size: 16px;
      line-height: 1.7;
      color: var(--text);
      background: var(--white);
      -webkit-font-smoothing: antialiased;
    }

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

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

    ul, ol {
      list-style: none;
    }

    button {
      font-family: inherit;
      cursor: pointer;
    }

    input {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ===== Header & Nav ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      height: var(--header-height);
      background: rgba(15, 23, 42, .88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255, 255, 255, .08);
      transition: box-shadow var(--transition);
    }

    .site-header:hover {
      box-shadow: 0 8px 32px rgba(0, 0, 0, .2);
    }

    .header-inner {
      height: var(--header-height);
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 1.15rem;
      font-weight: 800;
      color: #fff;
      white-space: nowrap;
    }

    .logo i {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--primary), #7c3aed);
      color: #fff;
      font-size: .95rem;
      box-shadow: 0 4px 16px rgba(79, 70, 229, .4);
      transition: transform var(--transition);
    }

    .logo:hover i {
      transform: rotate(-8deg) scale(1.05);
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 8px;
      flex: 1;
    }

    .nav-link {
      position: relative;
      padding: 8px 14px;
      font-size: .95rem;
      font-weight: 500;
      color: rgba(255, 255, 255, .78);
      border-radius: var(--radius-sm);
      transition: color var(--transition), background var(--transition);
    }

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

    .nav-link.active {
      color: #fff;
      background: rgba(255, 255, 255, .12);
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      left: 14px;
      right: 14px;
      bottom: 4px;
      height: 2px;
      border-radius: 2px;
      background: var(--accent);
    }

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

    .search-box {
      display: flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, .1);
      border: 1px solid rgba(255, 255, 255, .12);
      border-radius: 999px;
      padding: 8px 16px;
      color: rgba(255, 255, 255, .6);
      transition: border-color var(--transition), background var(--transition);
    }

    .search-box:focus-within {
      border-color: rgba(255, 255, 255, .3);
      background: rgba(255, 255, 255, .14);
    }

    .search-box input {
      background: transparent;
      border: none;
      outline: none;
      color: #fff;
      font-size: .85rem;
      width: 180px;
    }

    .search-box input::placeholder {
      color: rgba(255, 255, 255, .5);
    }

    .cta-btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 20px;
      border-radius: 999px;
      font-size: .9rem;
      font-weight: 700;
      color: #fff;
      background: linear-gradient(135deg, var(--primary), #7c3aed);
      box-shadow: 0 4px 20px rgba(79, 70, 229, .35);
      transition: transform var(--transition), box-shadow var(--transition);
    }

    .cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 28px rgba(79, 70, 229, .45);
    }

    .cta-btn:active {
      transform: translateY(0);
    }

    .nav-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      padding: 6px;
    }

    .nav-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: #fff;
      border-radius: 2px;
      transition: transform var(--transition), opacity var(--transition);
    }

    .nav-toggle.active span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle.active span:nth-child(2) {
      opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    /* ===== Hero ===== */
    .page-hero {
      position: relative;
      padding: 130px 0 110px;
      background-image: url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      color: #fff;
      overflow: hidden;
    }

    .page-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(15, 23, 42, .95) 0%, rgba(15, 23, 42, .78) 55%, rgba(79, 70, 229, .55) 100%);
    }

    .hero-inner {
      position: relative;
      z-index: 1;
      max-width: 860px;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 16px;
      border-radius: 999px;
      background: rgba(245, 158, 11, .15);
      border: 1px solid rgba(245, 158, 11, .4);
      color: #fbbf24;
      font-size: .85rem;
      font-weight: 600;
      margin-bottom: 20px;
    }

    .hero-inner h1 {
      font-size: clamp(1.8rem, 4.5vw, 3rem);
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 18px;
    }

    .hero-sub {
      font-size: clamp(1rem, 2vw, 1.2rem);
      color: rgba(255, 255, 255, .85);
      max-width: 680px;
      margin-bottom: 32px;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 12px 24px;
      border-radius: 999px;
      font-weight: 700;
      font-size: .95rem;
      transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
    }

    .btn:focus-visible {
      outline: 3px solid var(--primary-light);
      outline-offset: 2px;
    }

    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--primary), #7c3aed);
      box-shadow: 0 8px 24px rgba(79, 70, 229, .35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 32px rgba(79, 70, 229, .45);
    }

    .btn-ghost {
      color: #fff;
      background: rgba(255, 255, 255, .1);
      border: 1px solid rgba(255, 255, 255, .25);
      backdrop-filter: blur(8px);
    }

    .btn-ghost:hover {
      background: rgba(255, 255, 255, .18);
      transform: translateY(-2px);
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      max-width: 520px;
    }

    .stat-item {
      padding: 18px 20px;
      border-radius: var(--radius-md);
      background: rgba(255, 255, 255, .08);
      border: 1px solid rgba(255, 255, 255, .12);
      backdrop-filter: blur(10px);
    }

    .stat-item strong {
      display: block;
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.2;
    }

    .stat-item span {
      font-size: .85rem;
      color: rgba(255, 255, 255, .75);
    }

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

    .section-tag {
      display: inline-block;
      padding: 6px 14px;
      border-radius: 999px;
      background: rgba(79, 70, 229, .08);
      color: var(--primary);
      font-size: .8rem;
      font-weight: 700;
      letter-spacing: .5px;
      margin-bottom: 14px;
    }

    .section-head {
      max-width: 720px;
      margin-bottom: 56px;
    }

    .section-head h2 {
      font-size: clamp(1.6rem, 3vw, 2.4rem);
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 14px;
    }

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

    /* ===== Overview ===== */
    .section-overview {
      background: var(--light-bg);
    }

    .overview-grid {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 64px;
      align-items: center;
    }

    .overview-content h2 {
      font-size: clamp(1.5rem, 2.8vw, 2.2rem);
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 18px;
    }

    .overview-content > p {
      color: var(--text-muted);
      margin-bottom: 24px;
    }

    .check-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 28px;
    }

    .check-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: .95rem;
    }

    .check-list i {
      color: var(--primary);
      margin-top: 4px;
      font-size: 1.1rem;
    }

    .link-more {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--primary);
      font-weight: 700;
      font-size: .95rem;
      transition: gap var(--transition);
    }

    .link-more:hover {
      gap: 12px;
    }

    .overview-media {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }

    .overview-media img {
      width: 100%;
      height: 360px;
      object-fit: cover;
    }

    .overview-media::after {
      content: '';
      position: absolute;
      inset: 0;
      border-radius: var(--radius-lg);
      box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .12);
      pointer-events: none;
    }

    /* ===== Standards ===== */
    .standards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .standard-card {
      padding: 28px;
      border-radius: var(--radius-lg);
      background: var(--white);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: transform var(--transition), box-shadow var(--transition);
    }

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

    .standard-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      color: var(--primary);
      background: rgba(79, 70, 229, .1);
      margin-bottom: 18px;
    }

    .standard-score {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: .8rem;
      font-weight: 700;
      color: var(--accent-dark);
      background: rgba(245, 158, 11, .1);
      border-radius: 999px;
      padding: 4px 10px;
      margin-bottom: 12px;
    }

    .standard-card h3 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .standard-card p {
      font-size: .9rem;
      color: var(--text-muted);
    }

    /* ===== Recommended ===== */
    .section-recommended {
      background: var(--dark-bg);
      color: #fff;
    }

    .section-recommended .section-tag {
      background: rgba(245, 158, 11, .15);
      color: var(--accent);
    }

    .section-recommended .section-head p {
      color: rgba(255, 255, 255, .65);
    }

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

    .entry-card {
      background: rgba(255, 255, 255, .06);
      border: 1px solid rgba(255, 255, 255, .1);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
      backdrop-filter: blur(8px);
    }

    .entry-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, .3);
      border-color: rgba(255, 255, 255, .22);
    }

    .entry-media {
      position: relative;
      height: 190px;
      overflow: hidden;
    }

    .entry-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .4s ease;
    }

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

    .entry-badge {
      position: absolute;
      top: 12px;
      left: 12px;
      padding: 5px 12px;
      font-size: .75rem;
      font-weight: 700;
      border-radius: 999px;
      background: rgba(245, 158, 11, .95);
      color: #0f172a;
    }

    .entry-body {
      padding: 22px;
    }

    .entry-body h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .entry-body p {
      font-size: .88rem;
      color: rgba(255, 255, 255, .65);
      margin-bottom: 16px;
    }

    .entry-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 18px;
    }

    .rating {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 1rem;
      font-weight: 800;
      color: #fbbf24;
    }

    .rating i {
      color: #fbbf24;
    }

    .status {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: .8rem;
      color: #34d399;
    }

    .btn-outline {
      color: #fff;
      background: transparent;
      border: 1px solid rgba(255, 255, 255, .3);
      padding: 9px 20px;
      font-size: .85rem;
    }

    .btn-outline:hover {
      background: rgba(255, 255, 255, .12);
      border-color: rgba(255, 255, 255, .5);
      transform: translateY(-2px);
    }

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

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 24px;
    }

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

    .step-num {
      display: inline-block;
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary);
      opacity: .25;
      margin-bottom: 12px;
      line-height: 1;
    }

    .step-item h3 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: .85rem;
      color: var(--text-muted);
    }

    .step-item::after {
      content: '';
      position: absolute;
      top: 32px;
      right: -18px;
      width: 22px;
      height: 2px;
      background: linear-gradient(90deg, var(--primary), transparent);
    }

    .step-item:last-child::after {
      display: none;
    }

    /* ===== Tips ===== */
    .section-tips {
      background: var(--white);
    }

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

    .tip-card {
      display: flex;
      gap: 16px;
      padding: 24px;
      border-radius: var(--radius-md);
      background: var(--light-bg);
      border-left: 4px solid var(--accent);
      transition: transform var(--transition), background var(--transition);
    }

    .tip-card:hover {
      transform: translateX(4px);
      background: #eef2ff;
    }

    .tip-card i {
      font-size: 1.3rem;
      color: var(--accent);
      flex-shrink: 0;
    }

    .tip-card h3 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .tip-card p {
      font-size: .88rem;
      color: var(--text-muted);
    }

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

    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      background: var(--white);
      padding: 0 24px;
      transition: box-shadow var(--transition), border-color var(--transition);
    }

    .faq-item[open] {
      box-shadow: var(--shadow-md);
      border-color: rgba(79, 70, 229, .3);
    }

    .faq-item summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 0;
      font-weight: 700;
      font-size: 1rem;
      cursor: pointer;
      list-style: none;
      transition: color 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: .85rem;
      color: var(--text-muted);
      transition: transform var(--transition), color var(--transition);
    }

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

    .faq-item summary:hover {
      color: var(--primary);
    }

    .faq-item p {
      padding-bottom: 20px;
      font-size: .92rem;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* ===== CTA ===== */
    .section-cta {
      position: relative;
      background-image: url('/assets/images/backpic/back-3.png');
      background-size: cover;
      background-position: center;
      padding: 0;
    }

    .section-cta::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(15, 23, 42, .94), rgba(79, 70, 229, .82));
    }

    .cta-box {
      position: relative;
      z-index: 1;
      text-align: center;
      padding: 100px 24px;
      color: #fff;
    }

    .cta-box h2 {
      font-size: clamp(1.6rem, 3vw, 2.4rem);
      font-weight: 800;
      margin-bottom: 14px;
    }

    .cta-box p {
      font-size: 1.05rem;
      color: rgba(255, 255, 255, .8);
      margin-bottom: 32px;
    }

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

    .btn-light {
      background: #fff;
      color: var(--primary);
      font-weight: 800;
    }

    .btn-light:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 32px rgba(0, 0, 0, .25);
    }

    .btn-outline-light {
      color: #fff;
      border: 1px solid rgba(255, 255, 255, .4);
      background: rgba(255, 255, 255, .08);
    }

    .btn-outline-light:hover {
      background: rgba(255, 255, 255, .16);
      transform: translateY(-2px);
    }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--dark-bg);
      color: rgba(255, 255, 255, .8);
      padding: 70px 0 24px;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 48px;
    }

    .footer-brand .logo {
      color: #fff;
      margin-bottom: 16px;
    }

    .footer-brand p {
      font-size: .9rem;
      color: rgba(255, 255, 255, .6);
      max-width: 280px;
    }

    .footer-column h4 {
      font-size: .95rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 18px;
    }

    .footer-column ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-column a {
      font-size: .88rem;
      color: rgba(255, 255, 255, .6);
      transition: color var(--transition);
    }

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

    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, .1);
      font-size: .82rem;
      color: rgba(255, 255, 255, .5);
      text-align: center;
    }

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

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

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .standards-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .entry-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-grid {
        grid-template-columns: repeat(3, 1fr);
        row-gap: 32px;
      }
      .step-item:nth-child(3)::after {
        display: none;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      :root {
        --section-pad: 70px;
      }
      .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        background: rgba(15, 23, 42, .96);
        padding: 16px 24px;
        display: none;
        border-bottom: 1px solid rgba(255, 255, 255, .08);
        box-shadow: 0 16px 32px rgba(0, 0, 0, .3);
      }
      .nav-menu.open {
        display: flex;
      }
      .nav-link {
        padding: 12px 14px;
        border-radius: var(--radius-sm);
      }
      .nav-link.active::after {
        display: none;
      }
      .nav-toggle {
        display: flex;
      }
      .search-box {
        display: none;
      }
      .overview-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .entry-grid {
        grid-template-columns: 1fr;
      }
      .steps-grid {
        grid-template-columns: 1fr;
      }
      .step-item::after {
        display: none;
      }
      .tips-grid {
        grid-template-columns: 1fr;
      }
      .hero-stats {
        grid-template-columns: 1fr 1fr;
      }
      .cta-box {
        padding: 70px 24px;
      }
    }

    @media (max-width: 520px) {
      .container {
        padding: 0 16px;
      }
      .logo {
        font-size: 1rem;
      }
      .logo i {
        width: 30px;
        height: 30px;
        font-size: .8rem;
      }
      .cta-btn {
        padding: 8px 16px;
        font-size: .82rem;
      }
      .header-inner {
        gap: 16px;
      }
      .page-hero {
        padding: 90px 0 70px;
      }
      .hero-stats {
        grid-template-columns: 1fr;
      }
      .standards-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .stat-item strong {
        font-size: 1.5rem;
      }
    }