/* roulang page: index */
:root {
  --primary: #0b3d62;
  --primary-deep: #062b46;
  --primary-soft: #e8f1f8;
  --accent: #e07b39;
  --accent-hover: #c96a28;
  --accent-soft: #fff0e6;
  --success: #1d9b7d;
  --success-soft: #e2f5f0;
  --bg: #f4f8fb;
  --white: #ffffff;
  --text: #1c2b3a;
  --text-soft: #66809a;
  --border: #dfe9f1;
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 12px rgba(11, 61, 98, 0.06);
  --shadow-md: 0 8px 24px rgba(11, 61, 98, 0.08);
  --shadow-lg: 0 20px 44px rgba(11, 61, 98, 0.12);
  --container: 1200px;
  --header-h: 78px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
img {
  max-width: 100%;
  display: block;
}
button, input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
}
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section-pad {
  padding: 96px 0;
}
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  border-radius: 40px;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}
.section-head h2 {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--primary-deep);
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}
.section-head p {
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.8;
}
/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 60px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 24px rgba(11, 61, 98, 0.25);
}
.btn-primary:hover {
  background: var(--primary-deep);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(11, 61, 98, 0.35);
}
.btn-outline-light {
  border-color: rgba(255, 255, 255, 0.7);
  color: #fff;
  background: transparent;
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
  transform: translateY(-3px);
}
.btn-accent {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 24px rgba(224, 123, 57, 0.3);
}
.btn-accent:hover {
  background: var(--accent-hover);
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(224, 123, 57, 0.4);
}
.btn-block {
  width: 100%;
}
.btn:active {
  transform: translateY(0);
}
/* 徽章 */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  scale: 1;
}
.badge-primary {
  background: var(--primary-soft);
  color: var(--primary);
}
.badge-accent {
  background: var(--accent-soft);
  color: var(--accent);
}
.badge-success {
  background: var(--success-soft);
  color: var(--success);
}
/* 头部导航 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(223, 233, 241, 0.7);
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(11, 61, 98, 0.05);
}
.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--primary-deep);
  letter-spacing: 0;
  line-height: 1.2;
  z-index: 1001;
}
.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--success));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  box-shadow: var(--shadow-sm);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}
.nav-link {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 40px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  transition: var(--transition);
  position: relative;
}
.nav-link:hover {
  color: var(--primary);
  background: var(--primary-soft);
}
.nav-link.active {
  color: var(--primary);
  background: var(--primary-soft);
  font-weight: 700;
}
.nav-has-mega {
  position: relative;
}
.nav-link.has-mega::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 600;
  font-size: 11px;
  margin-left: 6px;
  color: var(--text-soft);
}
.mega-panel {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  padding: 26px;
  min-width: 520px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 100;
}
.nav-has-mega:hover .mega-panel,
.nav-has-mega:focus-within .mega-panel {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.mega-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.mega-item {
  display: block;
  padding: 16px;
  border-radius: var(--radius-md);
  background: var(--bg);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.mega-item:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.mega-item i {
  font-size: 22px;
  color: var(--primary);
  margin-bottom: 10px;
}
.mega-item h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary-deep);
  margin-bottom: 4px;
}
.mega-item p {
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.6;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 20px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.nav-toggle:hover {
  background: var(--primary);
  color: #fff;
}
/* Hero */
.hero {
  position: relative;
  min-height: 760px;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  color: #fff;
  padding-top: var(--header-h);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(130deg, rgba(6, 35, 54, 0.92) 15%, rgba(11, 61, 98, 0.72) 55%, rgba(29, 155, 125, 0.45) 100%);
  z-index: 1;
}
.hero .container {
  position: relative;
  z-index: 2;
  padding-top: 60px;
  padding-bottom: 100px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: 40px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
  font-size: 14px;
  font-weight: 500;
  color: #f0f9ff;
  margin-bottom: 28px;
  letter-spacing: 0.5px;
}
.hero h1 {
  font-size: 64px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 18px;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.25);
}
.hero-sub {
  font-size: 24px;
  font-weight: 600;
  color: #d9ebf7;
  margin-bottom: 14px;
}
.hero-desc {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: 38px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 64px;
}
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  max-width: 620px;
}
.metric-card {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  transition: var(--transition);
}
.metric-card:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-4px);
}
.metric-number {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.1;
  color: #fff;
  font-feature-settings: "tnum";
}
.metric-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  margin-top: 4px;
}
/* 核心说明 */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.feature-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  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: 4px;
  background: linear-gradient(90deg, var(--primary), var(--success));
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.feature-card:hover::before {
  opacity: 1;
}
.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: var(--transition);
}
.feature-card:hover .feature-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(-6deg) scale(1.05);
}
.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-deep);
  margin-bottom: 12px;
}
.feature-card p {
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.8;
}
/* 分类入口 */
.category-section {
  background: var(--white);
}
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.category-card {
  display: block;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--bg);
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
}
.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.category-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: var(--transition);
}
.category-card:hover img {
  transform: scale(1.05);
}
.category-card-body {
  padding: 24px 22px 28px;
}
.category-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary-deep);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.category-card-body h3 i {
  font-size: 15px;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-8px);
  transition: var(--transition);
}
.category-card:hover h3 i {
  opacity: 1;
  transform: translateX(0);
}
.category-card-body p {
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.7;
}
/* 数据统计 */
.stats-section {
  position: relative;
  background-size: cover;
  background-position: center;
  color: #fff;
  text-align: center;
  padding: 100px 0;
}
.stats-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(6, 35, 54, 0.94), rgba(11, 61, 98, 0.88));
  z-index: 1;
}
.stats-section .container {
  position: relative;
  z-index: 2;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  margin-top: 20px;
}
.stat-item {
  padding: 32px 20px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: var(--transition);
}
.stat-item:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-4px);
}
.stat-number {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1px;
  background: linear-gradient(135deg, #fff 30%, #bfe4d8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-label {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.75);
  margin-top: 10px;
}
/* 最新资讯 */
.latest-section {
  padding: 96px 0;
  background: var(--bg);
}
.post-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.post-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 30px 32px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.post-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(11, 61, 98, 0.2);
}
.post-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}
.post-cat {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
}
.post-time {
  font-size: 13px;
  color: var(--text-soft);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.post-card h3 {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--primary-deep);
  margin-bottom: 12px;
}
.post-card h3 a {
  color: var(--primary-deep);
}
.post-card h3 a:hover {
  color: var(--accent);
}
.post-excerpt {
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.75;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}
.post-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.post-link i {
  transition: transform 0.3s ease;
}
.post-link:hover {
  color: var(--accent);
}
.post-link:hover i {
  transform: translateX(4px);
}
.empty-tip {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px;
  color: var(--text-soft);
  font-size: 16px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border);
}
/* 特色优势 */
.advantage-section {
  background: var(--white);
  padding: 96px 0;
}
.advantage-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.advantage-visual {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  min-height: 460px;
  box-shadow: var(--shadow-lg);
}
.advantage-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
}
.advantage-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(30deg, rgba(6, 35, 54, 0.65), transparent 80%);
}
.advantage-content {
  padding: 20px 0;
}
.advantage-content .section-tag {
  margin-bottom: 12px;
}
.advantage-content h2 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--primary-deep);
  margin-bottom: 20px;
}
.advantage-content > p {
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 32px;
}
.advantage-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.advantage-list li {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}
.advantage-list i {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: 14px;
  background: var(--success-soft);
  color: var(--success);
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}
.advantage-list h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary-deep);
  margin-bottom: 6px;
}
.advantage-list p {
  font-size: 15px;
  color: var(--text-soft);
  line-height: 1.7;
}
/* FAQ */
.faq-section {
  padding: 96px 0;
  background: var(--bg);
}
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover {
  border-color: rgba(11, 61, 98, 0.2);
  box-shadow: var(--shadow-md);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: 24px 28px;
  font-size: 17px;
  font-weight: 600;
  color: var(--primary-deep);
  list-style: none;
  transition: var(--transition);
  gap: 16px;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 14px;
  color: var(--text-soft);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item[open] summary {
  color: var(--primary);
  border-bottom: 1px solid var(--border);
}
.faq-item[open] summary::after {
  transform: rotate(180deg);
  color: var(--primary);
}
.faq-answer {
  padding: 20px 28px 24px;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.85;
}
.faq-answer a {
  color: var(--primary);
  font-weight: 600;
}
.faq-answer a:hover {
  color: var(--accent);
}
/* CTA */
.cta-section {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 100px 0;
  color: #fff;
  text-align: center;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(6, 35, 54, 0.95), rgba(11, 61, 98, 0.88));
  z-index: 1;
}
.cta-section .container {
  position: relative;
  z-index: 2;
  max-width: 680px;
}
.cta-section h2 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}
.cta-section p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
  line-height: 1.8;
}
.cta-form {
  display: flex;
  gap: 12px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 60px;
  padding: 8px;
  backdrop-filter: blur(12px);
  max-width: 520px;
  margin: 0 auto;
}
.cta-form input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 12px 20px;
  color: #fff;
  font-size: 15px;
  min-width: 0;
}
.cta-form input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}
.cta-form input:focus {
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.3);
  border-radius: 40px;
}
.cta-form .btn {
  flex-shrink: 0;
}
.cta-note {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 16px;
}
/* 页脚 */
.site-footer {
  background: var(--primary-deep);
  color: rgba(255, 255, 255, 0.75);
  padding: 72px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 28px;
}
.footer-brand .brand {
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand .brand-icon {
  background: rgba(255, 255, 255, 0.15);
}
.footer-brand p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  max-width: 320px;
}
.footer-col h4 {
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 18px;
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-col a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}
.footer-col a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.45);
}
.footer-bottom a {
  color: rgba(255, 255, 255, 0.45);
}
.footer-bottom a:hover {
  color: #fff;
}
/* 响应式 */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }
  .section-pad {
    padding: 72px 0;
  }
  .hero h1 {
    font-size: 48px;
  }
  .hero-sub {
    font-size: 20px;
  }
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .advantage-wrap {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .advantage-visual {
    min-height: 340px;
  }
  .mega-panel {
    min-width: 420px;
  }
  .mega-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .section-pad {
    padding: 60px 0;
  }
  .section-head h2 {
    font-size: 30px;
  }
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    transition: var(--transition);
    z-index: 999;
  }
  .main-nav.is-open {
    transform: translateY(0);
  }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }
  .nav-link {
    display: block;
    border-radius: 12px;
    padding: 14px 18px;
  }
  .nav-has-mega {
    flex-direction: column;
  }
  .mega-panel {
    position: static;
    transform: none;
    min-width: 0;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    border: none;
    padding: 12px 0 0 16px;
  }
  .mega-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .mega-item {
    background: var(--bg);
    padding: 14px;
  }
  .hero {
    min-height: auto;
    padding-top: calc(var(--header-h) + 60px);
    padding-bottom: 60px;
  }
  .hero .container {
    padding-top: 0;
    padding-bottom: 0;
  }
  .hero h1 {
    font-size: 38px;
  }
  .hero-sub {
    font-size: 18px;
  }
  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
  }
  .metric-card {
    padding: 16px;
  }
  .metric-number {
    font-size: 28px;
  }
  .post-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  .stat-number {
    font-size: 40px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .cta-form {
    flex-direction: column;
    border-radius: 24px;
    padding: 16px;
  }
  .cta-form .btn {
    width: 100%;
  }
  .cta-form input {
    text-align: center;
    padding: 14px;
  }
  .faq-item summary {
    padding: 20px;
    font-size: 16px;
  }
  .faq-answer {
    padding: 16px 20px 20px;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .header-actions .btn {
    display: none;
  }
  .brand {
    font-size: 19px;
  }
  .brand-icon {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
  .hero h1 {
    font-size: 32px;
  }
  .hero-desc {
    font-size: 15px;
  }
  .hero-metrics {
    grid-template-columns: 1fr;
  }
  .category-grid {
    grid-template-columns: 1fr;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .stat-number {
    font-size: 36px;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .advantage-list li {
    flex-direction: column;
    gap: 10px;
  }
}

/* roulang page: category1 */
:root {
  --primary: #0b3a5a;
  --primary-deep: #072a42;
  --primary-medium: #145c80;
  --accent: #1f8a70;
  --accent-soft: #d9f2ec;
  --blue: #2f6fed;
  --blue-soft: #e8f0fe;
  --text: #1c2b36;
  --text-weak: #5a6b78;
  --bg: #f4f7fa;
  --bg-deep: #eaf0f5;
  --card: #ffffff;
  --border: #dde5eb;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 8px rgba(11, 58, 90, 0.06);
  --shadow: 0 10px 28px rgba(11, 58, 90, 0.09);
  --shadow-lg: 0 18px 44px rgba(11, 58, 90, 0.14);
  --container: 1200px;
  --gap: 24px;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease;
}

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

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

ul {
  list-style: none;
}

.container {
  width: min(var(--container), 100% - 48px);
  margin: 0 auto;
}

.section {
  padding: 96px 0;
}

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

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

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.section-tag.blue {
  background: var(--blue-soft);
  color: var(--blue);
}

.section-head h2 {
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.25;
  color: var(--primary-deep);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  padding: 12px 24px;
  font-size: 15px;
  outline: none;
  line-height: 1.4;
}

.btn i {
  font-size: 14px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(11, 58, 90, 0.25);
}

.btn-primary:hover {
  background: var(--primary-deep);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(11, 58, 90, 0.3);
}

.btn-primary:focus-visible,
.btn-outline:focus-visible {
  outline: 3px solid rgba(47, 111, 237, 0.4);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
  backdrop-filter: blur(4px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: #fff;
  transform: translateY(-2px);
}

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

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(11, 58, 90, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--primary-deep);
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 17px;
  flex: 0 0 auto;
}

.main-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-weak);
  transition: all 0.25s ease;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(11, 58, 90, 0.05);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(11, 58, 90, 0.08);
}

.nav-has-mega {
  position: relative;
}

.mega-panel {
  position: absolute;
  top: 110%;
  left: 0;
  width: 520px;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 18px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s ease;
  border: 1px solid rgba(11, 58, 90, 0.08);
}

.nav-has-mega:hover .mega-panel,
.nav-has-mega:focus-within .mega-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

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

.mega-item {
  display: block;
  padding: 16px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg);
  transition: all 0.25s ease;
  border: 1px solid transparent;
}

.mega-item:hover {
  background: var(--bg-deep);
  border-color: rgba(11, 58, 90, 0.1);
  transform: translateY(-2px);
}

.mega-item i {
  color: var(--accent);
  font-size: 18px;
  margin-bottom: 10px;
}

.mega-item h4 {
  font-size: 15px;
  color: var(--primary-deep);
  margin-bottom: 6px;
}

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

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

.btn-sm {
  padding: 10px 22px;
  font-size: 14px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 10px;
  color: var(--primary);
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
}

.nav-toggle:hover {
  background: var(--bg);
}

/* Hero */
.page-hero {
  position: relative;
  padding: 108px 0 116px;
  background-image: linear-gradient(rgba(7, 42, 66, 0.78), rgba(11, 58, 90, 0.85)), url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  color: #fff;
  overflow: hidden;
}

.page-hero::after {
  content: '';
  position: absolute;
  right: -120px;
  bottom: -160px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: rgba(31, 138, 112, 0.25);
  filter: blur(60px);
}

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

.crumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 24px;
}

.crumb a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

.crumb i {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.5);
}

.hero-content h1 {
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-content p {
  font-size: 17px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 36px;
  max-width: 620px;
}

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

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 26px;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.8);
}

.hero-meta-item i {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 13px;
}

/* Category Intro */
.intro-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.intro-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.intro-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(31, 138, 112, 0.25);
}

.intro-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-size: 20px;
  margin-bottom: 18px;
  background: var(--accent-soft);
  color: var(--accent);
}

.intro-card h3 {
  font-size: 18px;
  color: var(--primary-deep);
  margin-bottom: 8px;
  font-weight: 700;
}

.intro-card p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
}

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

.feature-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s ease;
  display: flex;
  flex-direction: column;
}

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

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

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

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

.feature-cover .tag-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(4px);
}

.tag-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  background: var(--blue-soft);
}

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

.feature-body h3 {
  font-size: 19px;
  line-height: 1.5;
  color: var(--primary-deep);
  margin-bottom: 10px;
  font-weight: 700;
}

.feature-body p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.75;
  flex: 1;
  margin-bottom: 18px;
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
}

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

.feature-link i {
  font-size: 12px;
  transition: transform 0.25s ease;
}

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

/* Table list */
.list-section {
  background: var(--bg-deep);
}

.table-wrap {
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.list-row {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s ease;
}

.list-row:last-child {
  border-bottom: none;
}

.list-row:hover {
  background: rgba(47, 111, 237, 0.03);
}

.list-date {
  flex: 0 0 90px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-weak);
  font-variant-numeric: tabular-nums;
}

.list-date i {
  color: var(--blue);
}

.list-title {
  flex: 1;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  transition: color 0.2s ease;
}

.list-title:hover {
  color: var(--blue);
}

.list-tag {
  flex: 0 0 auto;
}

.list-views {
  flex: 0 0 120px;
  text-align: right;
  font-size: 13px;
  color: var(--text-weak);
}

.list-views i {
  margin-right: 4px;
  color: var(--accent);
}

/* Stats */
.stats-block {
  background: linear-gradient(135deg, var(--primary-deep), var(--primary-medium));
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  color: #fff;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
  overflow: hidden;
}

.stats-block::after {
  content: '';
  position: absolute;
  right: -80px;
  top: -80px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(47, 111, 237, 0.2);
  filter: blur(30px);
}

.stat-item {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 12px 0;
}

.stat-item .num {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}

.stat-item .label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
}

.stat-item .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.12);
  font-size: 18px;
  margin-bottom: 16px;
}

/* Steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
  counter-reset: step;
}

.step-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

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

.step-num {
  font-size: 40px;
  font-weight: 800;
  color: rgba(11, 58, 90, 0.12);
  line-height: 1;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}

.step-card h3 {
  font-size: 17px;
  color: var(--primary-deep);
  margin-bottom: 8px;
  font-weight: 700;
}

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

/* FAQ */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

details.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  overflow: hidden;
  transition: all 0.3s ease;
}

details.faq-item[open] {
  box-shadow: var(--shadow-sm);
  border-color: rgba(31, 138, 112, 0.3);
}

details.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 22px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  list-style: none;
  transition: background 0.2s ease;
}

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

details.faq-item summary:hover {
  background: rgba(11, 58, 90, 0.02);
}

details.faq-item summary i {
  color: var(--accent);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

details.faq-item[open] summary i {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 22px 20px;
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.8;
}

/* CTA subscribe */
.subscribe-section {
  position: relative;
  padding: 100px 0;
  background-image: linear-gradient(rgba(7, 42, 66, 0.82), rgba(11, 58, 90, 0.9)), url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  color: #fff;
  text-align: center;
}

.subscribe-inner {
  max-width: 640px;
  margin: 0 auto;
}

.subscribe-inner h2 {
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}

.subscribe-inner p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 32px;
}

.subscribe-form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 8px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}

.subscribe-form input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 10px 18px;
  border-radius: 999px;
  color: #fff;
  font-size: 15px;
  outline: none;
  position: relative;
}

.subscribe-form input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.subscribe-form input:focus {
  outline: none;
}

.subscribe-form input:focus-visible {
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.25);
}

.subscribe-form .btn {
  border-radius: 999px;
  flex-shrink: 0;
}

.subscribe-note {
  margin-top: 18px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

/* Footer */
.site-footer {
  background: var(--primary-deep);
  color: rgba(255, 255, 255, 0.65);
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 56px;
  padding-bottom: 48px;
}

.footer-brand .brand {
  color: #fff;
  margin-bottom: 18px;
}

.footer-brand .brand-icon {
  background: rgba(255, 255, 255, 0.1);
}

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

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 22px;
}

.footer-col ul li a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  padding: 6px 0;
  transition: all 0.2s ease;
}

.footer-col ul li a:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-col ul li a i {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.35);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

/* Responsive */
@media (max-width: 1024px) {
  .intro-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

  .mega-panel {
    width: 440px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 18px 24px;
    flex-direction: column;
    align-items: stretch;
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    margin-left: 0;
  }

  .main-nav.open {
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-link {
    padding: 12px 16px;
    border-radius: 10px;
  }

  .nav-has-mega {
    position: static;
  }

  .mega-panel {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    width: 100%;
    box-shadow: none;
    margin-top: 10px;
    background: var(--bg);
    border: none;
    padding: 12px;
    display: none;
  }

  .nav-has-mega:hover .mega-panel {
    display: block;
  }

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

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

  .nav-toggle {
    display: flex;
  }

  .page-hero {
    padding: 80px 0 90px;
  }

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

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

  .subscribe-form {
    flex-direction: column;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.1);
  }

  .subscribe-form .btn {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .container {
    width: calc(100% - 32px);
  }

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

  .stats-block {
    grid-template-columns: 1fr;
    padding: 40px 24px;
  }

  .list-row {
    flex-wrap: wrap;
    gap: 8px;
    padding: 16px 18px;
  }

  .list-date {
    flex-basis: auto;
    font-size: 13px;
    width: 100%;
  }

  .list-title {
    flex: 1 1 100%;
    font-size: 14px;
  }

  .list-views {
    display: none;
  }

  .hero-btns {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-btns .btn {
    text-align: center;
  }

  .hero-meta {
    gap: 14px;
  }

  .cta-form {
    flex-direction: column;
    border-radius: 20px;
    padding: 16px;
  }

  .cta-form input {
    text-align: center;
  }

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

/* roulang page: article */
:root {
  --primary: #0a2e45;
  --primary-light: #143e56;
  --primary-soft: #e6edf2;
  --accent: #217a8a;
  --accent-light: #e3f1f3;
  --accent-border: #b5d7db;
  --red-uk: #c8102e;
  --bg: #f4f7f9;
  --bg-alt: #e9eff3;
  --card: #ffffff;
  --text: #172b36;
  --text-weak: #5c7080;
  --border: #dde6eb;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --shadow: 0 8px 30px rgba(10, 46, 69, 0.08);
  --shadow-hover: 0 16px 48px rgba(10, 46, 69, 0.14);
  --spacing: 84px;
  --transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif; line-height: 1.7; color: var(--text); background: var(--bg); font-size: 15px; overflow-x: hidden; }
img { max-width: 100%; display: block; border: 0; }
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }
ul, ol { list-style: none; }
button, input { font-family: inherit; font-size: inherit; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: var(--spacing) 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 30px; border-radius: 10px; border: 0; font-size: 15px; font-weight: 600; cursor: pointer; transition: var(--transition); line-height: 1.2; white-space: nowrap; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--accent); color: #fff; transform: translateY(-2px); box-shadow: 0 12px 24px rgba(10, 46, 69, 0.2); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--primary); color: #fff; transform: translateY(-2px); box-shadow: 0 12px 24px rgba(33, 122, 138, 0.25); }
.btn-light { background: #fff; color: var(--primary); border: 1px solid var(--border); }
.btn-light:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(10, 46, 69, 0.08); }
.btn-sm { padding: 8px 20px; font-size: 13px; border-radius: 8px; }
.btn:focus-visible { outline: 3px solid rgba(33, 122, 138, 0.45); outline-offset: 2px; }

.site-header { background: rgba(255, 255, 255, 0.96); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 1000; }
.header-inner { display: flex; align-items: center; gap: 24px; padding-top: 14px; padding-bottom: 14px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 21px; font-weight: 700; color: var(--primary); letter-spacing: 0.5px; }
.brand:hover { color: var(--accent); }
.brand-icon { width: 40px; height: 40px; border-radius: 11px; background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-size: 17px; box-shadow: 0 4px 14px rgba(10, 46, 69, 0.25); }
.main-nav { flex: 1; display: flex; justify-content: center; }
.nav-list { display: flex; align-items: center; gap: 4px; }
.nav-list > li { position: relative; }
.nav-link { display: inline-flex; align-items: center; gap: 6px; padding: 12px 22px; border-radius: 10px; font-weight: 500; color: var(--text); font-size: 16px; }
.nav-link:hover { background: var(--primary-soft); color: var(--primary); }
.nav-link.active { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(10, 46, 69, 0.18); }
.has-mega:focus, .nav-has-mega:hover .has-mega { background: var(--primary-soft); color: var(--primary); }
.mega-panel { position: absolute; top: calc(100% + 12px); left: 50%; transform: translateX(-50%) translateY(8px); background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-hover); padding: 22px; min-width: 560px; opacity: 0; visibility: hidden; transition: var(--transition); border: 1px solid var(--border); z-index: 999; }
.nav-has-mega:hover .mega-panel { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.mega-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.mega-item { display: block; background: var(--bg); border-radius: 12px; padding: 18px 16px; border: 1px solid var(--border); transition: var(--transition); }
.mega-item:hover { background: var(--accent-light); border-color: var(--accent-border); transform: translateY(-3px); }
.mega-item i { font-size: 22px; color: var(--accent); margin-bottom: 10px; display: inline-block; width: 42px; height: 42px; background: #fff; border-radius: 10px; display: inline-flex; align-items: center; justify-content: center; box-shadow: 0 3px 10px rgba(10, 46, 69, 0.06); }
.mega-item h4 { font-size: 15px; color: var(--primary); margin-bottom: 6px; }
.mega-item p { font-size: 12px; color: var(--text-weak); line-height: 1.5; }
.header-actions { display: flex; align-items: center; gap: 14px; margin-left: auto; }
.nav-toggle { display: none; width: 44px; height: 44px; border-radius: 10px; border: 1px solid var(--border); background: #fff; color: var(--primary); font-size: 18px; cursor: pointer; align-items: center; justify-content: center; transition: var(--transition); }
.nav-toggle:hover { background: var(--primary-soft); border-color: var(--accent); }

.article-banner { background-size: cover; background-position: center; position: relative; padding: 80px 0 130px; }
.article-banner::before { content: ""; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(10, 46, 69, 0.92) 0%, rgba(10, 46, 69, 0.75) 50%, rgba(20, 80, 100, 0.68) 100%); }
.article-banner .container { position: relative; z-index: 2; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 13px; color: rgba(255, 255, 255, 0.7); margin-bottom: 20px; }
.breadcrumb a { color: rgba(255, 255, 255, 0.8); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb i { font-size: 10px; color: rgba(255, 255, 255, 0.4); }
.article-title { font-size: clamp(28px, 4vw, 42px); font-weight: 700; color: #fff; line-height: 1.3; margin-bottom: 20px; max-width: 860px; letter-spacing: 0.5px; text-shadow: 0 2px 18px rgba(0, 0, 0, 0.2); }
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; color: rgba(255, 255, 255, 0.8); font-size: 14px; }
.meta-tag { display: inline-block; background: rgba(255, 255, 255, 0.16); border: 1px solid rgba(255, 255, 255, 0.3); color: #fff; padding: 4px 14px; border-radius: 100px; font-size: 12px; font-weight: 500; }
.meta-item { display: inline-flex; align-items: center; gap: 7px; }
.meta-item i { color: rgba(255, 255, 255, 0.6); }

.article-main { padding: 0 0 var(--spacing); margin-top: -60px; position: relative; z-index: 5; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 40px; align-items: start; }
.article-content { background: var(--card); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow); border: 1px solid var(--border); }
.article-cover { margin: -40px -40px 30px; border-radius: var(--radius-lg) var(--radius-lg) 0 0; overflow: hidden; }
.article-cover img { width: 100%; height: auto; max-height: 420px; object-fit: cover; }
.article-body { font-size: 16px; line-height: 1.9; color: var(--text); }
.article-body p { margin-bottom: 1.7em; }
.article-body h2, .article-body h3 { color: var(--primary); margin-bottom: 0.8em; font-weight: 700; margin-top: 1.8em; }
.article-body h2 { font-size: 26px; border-left: 4px solid var(--accent); padding-left: 14px; }
.article-body h3 { font-size: 20px; }
.article-body ul, .article-body ol { margin-bottom: 1.7em; padding-left: 1.5em; }
.article-body ul li { position: relative; padding-left: 0; margin-bottom: 0.6em; }
.article-body ul li::before { content: "◆"; color: var(--accent); font-size: 11px; position: absolute; left: -1.3em; top: 0.35em; }
.article-body ol { list-style: decimal; }
.article-body ol li { margin-bottom: 0.6em; }
.article-body blockquote { border-left: 4px solid var(--accent); background: var(--accent-light); padding: 18px 24px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin-bottom: 1.7em; color: var(--primary); font-style: normal; font-weight: 500; }
.article-body blockquote p { margin-bottom: 0; }
.article-body img { border-radius: var(--radius); margin-bottom: 1.5em; }
.article-body a { text-decoration: underline; text-underline-offset: 3px; }
.article-body table { width: 100%; border-collapse: collapse; margin-bottom: 1.7em; display: block; overflow-x: auto; white-space: nowrap; }
.article-body table th, .article-body table td { border: 1px solid var(--border); padding: 12px 16px; text-align: left; font-size: 14px; }
.article-body table th { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.not-found-box { padding: 60px 20px; text-align: center; }
.not-found-box h2 { font-size: 36px; color: var(--primary); margin-bottom: 16px; }
.not-found-box p { color: var(--text-weak); margin-bottom: 28px; }
.article-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 36px; padding-top: 26px; border-top: 1px solid var(--border); }
.article-tags .tag-label { font-size: 13px; color: var(--text-weak); display: inline-flex; align-items: center; gap: 6px; }
.tag { display: inline-block; padding: 6px 15px; background: var(--primary-soft); border-radius: 100px; font-size: 13px; font-weight: 500; color: var(--primary); transition: var(--transition); cursor: default; border: 1px solid transparent; }
.tag:hover { background: var(--accent-light); border-color: var(--accent-border); color: var(--accent); }

.article-sidebar { display: flex; flex-direction: column; gap: 24px; }
.sidebar-card { background: var(--card); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); border: 1px solid var(--border); }
.sidebar-card h3 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 18px; display: flex; align-items: center; gap: 10px; }
.sidebar-card h3 i { color: var(--accent); font-size: 17px; }
.about-card-text p { font-size: 14px; color: var(--text-weak); line-height: 1.7; margin-bottom: 12px; }
.about-card-text p:last-child { margin-bottom: 0; }
.info-list { display: flex; flex-direction: column; gap: 12px; }
.info-list .info-item { display: flex; align-items: flex-start; gap: 12px; font-size: 14px; }
.info-list .info-item i { color: var(--accent); margin-top: 4px; width: 18px; text-align: center; font-size: 14px; }
.info-list .info-item .info-label { color: var(--text-weak); min-width: 60px; flex-shrink: 0; }
.info-list .info-item .info-value { color: var(--text); font-weight: 500; }
.sidebar-latest { display: flex; flex-direction: column; gap: 0; }
.sidebar-latest li { border-bottom: 1px solid var(--border); }
.sidebar-latest li:last-child { border-bottom: 0; }
.sidebar-latest a { display: flex; align-items: flex-start; gap: 12px; padding: 13px 0; transition: var(--transition); }
.sidebar-latest a:hover { padding-left: 8px; }
.sidebar-latest .latest-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); margin-top: 9px; flex-shrink: 0; }
.sidebar-latest .latest-text { font-size: 14px; color: var(--text); line-height: 1.5; font-weight: 500; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sidebar-latest a:hover .latest-text { color: var(--accent); }
.sidebar-card.category-card .cate-list { display: flex; flex-direction: column; gap: 8px; }
.sidebar-card.category-card .cate-list a { display: flex; align-items: center; gap: 10px; padding: 10px 14px; background: var(--bg); border-radius: var(--radius-sm); border: 1px solid transparent; font-size: 14px; font-weight: 500; color: var(--text); transition: var(--transition); }
.sidebar-card.category-card .cate-list a:hover { background: var(--accent-light); border-color: var(--accent-border); color: var(--accent); transform: translateX(4px); }
.sidebar-card.category-card .cate-list i { color: var(--accent); font-size: 13px; width: 20px; text-align: center; }

.related-posts { background: var(--bg-alt); padding: var(--spacing) 0; border-top: 1px solid var(--border); }
.section-header { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.section-header .section-label { display: inline-block; background: var(--accent-light); color: var(--accent); font-size: 13px; font-weight: 700; padding: 6px 18px; border-radius: 100px; margin-bottom: 16px; letter-spacing: 1px; }
.section-header h2 { font-size: clamp(28px, 3.5vw, 38px); font-weight: 800; color: var(--primary); line-height: 1.25; margin-bottom: 16px; }
.section-header p { color: var(--text-weak); font-size: 16px; line-height: 1.7; }
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.related-card { display: block; background: var(--card); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); box-shadow: 0 4px 14px rgba(10, 46, 69, 0.05); transition: var(--transition); }
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--accent-border); }
.related-card-cover { height: 180px; overflow: hidden; position: relative; }
.related-card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.related-card:hover .related-card-cover img { transform: scale(1.06); }
.related-card-body { padding: 20px 20px 22px; }
.related-card-body h3 { font-size: 16px; font-weight: 600; color: var(--primary); line-height: 1.4; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; transition: var(--transition); }
.related-card:hover .related-card-body h3 { color: var(--accent); }
.related-card-meta { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: var(--text-weak); }
.related-card-meta .card-cate { background: var(--primary-soft); color: var(--primary); padding: 3px 10px; border-radius: 100px; font-weight: 500; font-size: 11px; }
.related-empty { grid-column: 1 / -1; text-align: center; padding: 40px; color: var(--text-weak); background: var(--card); border-radius: var(--radius); border: 1px solid var(--border); }

.cta-section { padding: 0; background: var(--card); }
.cta-inner { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, var(--accent) 100%); border-radius: var(--radius-lg); padding: 64px 48px; color: #fff; display: flex; align-items: center; justify-content: space-between; gap: 40px; margin-top: var(--spacing); margin-bottom: var(--spacing); position: relative; overflow: hidden; }
.cta-inner::before { content: ""; position: absolute; top: -60px; right: -40px; width: 260px; height: 260px; border-radius: 50%; background: rgba(255, 255, 255, 0.08); }
.cta-inner::after { content: ""; position: absolute; bottom: -100px; left: 20%; width: 200px; height: 200px; border-radius: 50%; background: rgba(255, 255, 255, 0.05); }
.cta-text { position: relative; z-index: 2; }
.cta-text h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 800; margin-bottom: 14px; line-height: 1.3; }
.cta-text p { font-size: 15px; opacity: 0.85; max-width: 460px; margin-bottom: 0; }
.cta-form-wrap { position: relative; z-index: 2; width: 100%; max-width: 420px; }
.cta-form-wrap .subscribe-form { display: flex; gap: 10px; background: #fff; padding: 6px; border-radius: 60px; box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2); }
.cta-form-wrap .subscribe-form input { flex: 1; border: 0; background: transparent; padding: 12px 18px; font-size: 14px; color: var(--text); outline: none; min-width: 0; }
.cta-form-wrap .subscribe-form input::placeholder { color: var(--text-weak); }
.cta-form-wrap .subscribe-form .btn { border-radius: 50px; padding: 12px 26px; font-size: 14px; flex-shrink: 0; }

.site-footer { background: var(--primary); color: rgba(255, 255, 255, 0.75); padding: 70px 0 0; }
.site-footer .brand { color: #fff; }
.site-footer .brand-icon { background: rgba(255, 255, 255, 0.15); box-shadow: none; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px; padding-bottom: 50px; border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
.footer-brand p { margin-top: 18px; font-size: 14px; line-height: 1.8; color: rgba(255, 255, 255, 0.65); max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 20px; position: relative; padding-bottom: 12px; }
.footer-col h4::after { content: ""; position: absolute; bottom: 0; left: 0; width: 32px; height: 2px; background: var(--accent); border-radius: 2px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { color: rgba(255, 255, 255, 0.65); font-size: 14px; display: inline-flex; align-items: center; gap: 8px; transition: var(--transition); }
.footer-col ul li a:hover { color: #fff; padding-left: 4px; }
.footer-col ul li a i { font-size: 11px; color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding: 26px 0 30px; font-size: 13px; color: rgba(255, 255, 255, 0.5); }

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer-brand { grid-column: 1 / -1; }
  .related-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .mega-panel { min-width: 460px; left: 0; transform: translateX(-10%) translateY(8px); }
  .nav-has-mega:hover .mega-panel { transform: translateX(-10%) translateY(0); }
}
@media (max-width: 992px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
}
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .section { padding: 56px 0; }
  .header-inner { flex-wrap: wrap; padding-top: 12px; padding-bottom: 12px; }
  .brand { font-size: 18px; }
  .brand-icon { width: 36px; height: 36px; font-size: 15px; }
  .nav-toggle { display: inline-flex; }
  .main-nav { flex: 1 0 100%; display: none; margin-top: 4px; padding-top: 10px; border-top: 1px solid var(--border); }
  .main-nav.open { display: block; }
  .nav-list { flex-direction: column; gap: 2px; align-items: stretch; }
  .nav-list > li { width: 100%; }
  .nav-link { width: 100%; padding: 12px 16px; border-radius: 8px; }
  .mega-panel { position: static; transform: none; opacity: 1; visibility: visible; min-width: 0; box-shadow: none; border: 0; padding: 10px 0 10px 10px; background: transparent; display: none; }
  .nav-has-mega.open .mega-panel { display: block; }
  .mega-grid { grid-template-columns: 1fr; gap: 8px; }
  .mega-item { background: var(--bg); }
  .article-banner { padding: 48px 0 110px; }
  .article-main { margin-top: -40px; }
  .article-content { padding: 28px 24px; }
  .article-cover { margin: -28px -24px 24px; }
  .article-sidebar { grid-template-columns: 1fr; }
  .cta-inner { flex-direction: column; padding: 48px 30px; text-align: center; }
  .cta-text p { margin: 0 auto; }
  .cta-form-wrap { max-width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .related-grid { grid-template-columns: 1fr; }
  .related-card-cover { height: 200px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  body { font-size: 14px; }
  .section { padding: 48px 0; }
  .btn { padding: 12px 22px; }
  .header-actions .btn-sm { padding: 8px 14px; font-size: 12px; }
  .article-title { font-size: 24px; }
  .article-meta { gap: 10px 14px; font-size: 12px; }
  .article-content { padding: 22px 16px; }
  .article-cover { margin: -22px -16px 20px; }
  .article-body { font-size: 15px; }
  .article-body h2 { font-size: 21px; }
  .article-body h3 { font-size: 18px; }
  .cta-inner { padding: 40px 24px; gap: 24px; }
  .cta-form-wrap .subscribe-form { flex-direction: column; border-radius: 16px; gap: 0; }
  .cta-form-wrap .subscribe-form input { border: 1px solid var(--border); border-radius: 12px; margin-bottom: 8px; }
  .cta-form-wrap .subscribe-form .btn { width: 100%; }
  .related-card-cover { height: 170px; }
}