/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --primary: #0b5394;
  --primary-dark: #083d6d;
  --primary-light: #e8f0fe;
  --accent: #f9a826;
  --accent-dark: #c5821c;
  --bg: #f4f6fb;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 10px 40px rgba(11, 83, 148, 0.08);
  --shadow-lg: 0 20px 50px rgba(11, 83, 148, 0.16);
  --transition: all 0.3s ease;
  --container: 1200px;
}

/* ========== 基础 Reset ========== */
*, *::before, *::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  padding: 0;
  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(--bg);
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

/* ========== 容器 ========== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 5rem 0;
}
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3rem;
}
.section-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 99px;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: 2.2rem;
  line-height: 1.3;
  font-weight: 800;
  margin: 0.5rem 0 0.8rem;
  color: var(--text);
}
.section-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ========== 顶部吸顶导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 24px rgba(15, 23, 42, 0.06);
  border-bottom: 1px solid var(--border);
}
.header-top {
  background: var(--primary);
  color: #fff;
  font-size: 0.82rem;
  padding: 6px 0;
  display: none;
}
@media (min-width: 768px) {
  .header-top {
    display: block;
  }
}
.header-top .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.header-top a {
  color: rgba(255, 255, 255, 0.85);
  margin-left: 18px;
  transition: var(--transition);
}
.header-top a:hover {
  color: #fff;
}
.header-main .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  box-shadow: 0 4px 14px rgba(11, 83, 148, 0.35);
}
.brand-text {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text);
}
.brand-text span {
  color: var(--primary);
}
.main-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.main-nav a {
  display: block;
  padding: 10px 18px;
  font-weight: 500;
  font-size: 0.98rem;
  color: var(--text);
  border-radius: 99px;
  transition: var(--transition);
  position: relative;
}
.main-nav a:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.main-nav a.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}
.nav-search {
  flex-shrink: 0;
}
.nav-search form {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 99px;
  overflow: hidden;
  transition: var(--transition);
}
.nav-search form:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(11, 83, 148, 0.1);
}
.nav-search input {
  border: none;
  background: transparent;
  padding: 8px 16px;
  outline: none;
  width: 180px;
  font-size: 0.9rem;
  color: var(--text);
}
.nav-search button {
  border: none;
  background: transparent;
  color: var(--text-muted);
  padding: 0 14px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--transition);
}
.nav-search button:hover {
  color: var(--primary);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-color: #0a2a43;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(8, 28, 48, 0.88) 0%, rgba(8, 28, 48, 0.6) 50%, rgba(8, 28, 48, 0.2) 100%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 700px;
  padding: 100px 0;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(249, 168, 38, 0.15);
  border: 1px solid rgba(249, 168, 38, 0.4);
  color: #ffc46b;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 7px 18px;
  border-radius: 99px;
  margin-bottom: 22px;
  letter-spacing: 0.5px;
}
.hero h1 {
  font-size: 3.4rem;
  line-height: 1.15;
  color: #fff;
  font-weight: 800;
  margin: 0 0 18px;
  letter-spacing: 2px;
}
.hero p {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 560px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 42px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 99px;
  font-weight: 600;
  font-size: 0.98rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  justify-content: center;
}
.btn i {
  font-size: 0.9rem;
}
.btn-primary {
  background: var(--accent);
  color: #0a2a43;
  border-color: var(--accent);
  box-shadow: 0 6px 24px rgba(249, 168, 38, 0.35);
}
.btn-primary:hover {
  background: #ffb84d;
  border-color: #ffb84d;
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(249, 168, 38, 0.4);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.7);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  transform: translateY(-2px);
}
.btn-light {
  background: #fff;
  color: var(--primary);
  border-color: #fff;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}
.btn-light:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
}
.hero-stats div {
  color: #fff;
}
.hero-stats strong {
  display: block;
  font-size: 1.8rem;
  font-weight: 800;
  color: #ffc46b;
  line-height: 1.2;
}
.hero-stats span {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.7);
}

/* ========== 核心优势 ========== */
.features {
  background: var(--surface);
}
.features-grid {
  margin: 0 -15px;
}
.feature-card {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  transition: var(--transition);
  height: 100%;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}
.feature-card:hover::before {
  opacity: 1;
}
.feature-icon {
  width: 58px;
  height: 58px;
  background: var(--primary-light);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--primary);
  margin-bottom: 20px;
  transition: var(--transition);
}
.feature-card:hover .feature-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(5deg) scale(1.05);
}
.feature-card h3 {
  font-size: 1.15rem;
  margin: 0 0 10px;
  font-weight: 700;
}
.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0;
}

/* ========== 分类入口 ========== */
.category-section {
  background: var(--bg);
}
.category-grid {
  margin: 0 -15px;
}
.category-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.category-card .cover {
  position: relative;
  height: 220px;
  overflow: hidden;
}
.category-card .cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.category-card:hover .cover img {
  transform: scale(1.05);
}
.category-card .cover-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(8, 28, 48, 0.6));
}
.category-card .cover .cat-icon {
  position: absolute;
  bottom: 16px;
  left: 20px;
  color: #fff;
  font-size: 1.3rem;
  z-index: 1;
}
.category-card .cat-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.category-card .cat-body h3 {
  font-size: 1.1rem;
  margin: 0 0 8px;
  font-weight: 700;
}
.category-card .cat-body p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
  margin-bottom: 18px;
  flex: 1;
}
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
}
.link-arrow i {
  transition: transform 0.3s ease;
}
.link-arrow:hover {
  color: var(--primary-dark);
}
.link-arrow:hover i {
  transform: translateX(4px);
}

/* ========== 最新资讯 ========== */
.news-section {
  background: var(--surface);
}
.news-grid {
  margin: 0 -15px;
}
.news-card {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.news-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--primary);
}
.news-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 99px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary);
}
.badge-warm {
  background: rgba(249, 168, 38, 0.15);
  color: var(--accent-dark);
}
.news-date {
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 5px;
}
.news-card-title {
  font-size: 1.08rem;
  line-height: 1.45;
  font-weight: 700;
  margin: 0 0 10px;
}
.news-card-title a {
  color: var(--text);
  transition: var(--transition);
}
.news-card-title a:hover {
  color: var(--primary);
}
.news-card-excerpt {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 18px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}
.news-card-link:hover {
  color: var(--accent-dark);
  gap: 10px;
}
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  background: var(--surface-alt);
  border-radius: var(--radius-lg);
  border: 2px dashed var(--border);
}
.empty-state i {
  font-size: 2.4rem;
  color: var(--text-muted);
  opacity: 0.5;
  margin-bottom: 14px;
}
.empty-state p {
  color: var(--text-muted);
  font-size: 1rem;
  margin: 0;
}

/* ========== 数据统计 ========== */
.stats-section {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
}
.stats-section .section-header h2 {
  color: #fff;
}
.stats-section .section-header p {
  color: rgba(255, 255, 255, 0.75);
}
.stats-section .section-tag {
  background: rgba(255, 255, 255, 0.12);
  color: #ffc46b;
}
.stats-grid {
  margin: 0 -15px;
}
.stat-item {
  text-align: center;
  padding: 30px 20px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  transition: var(--transition);
  height: 100%;
}
.stat-item:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-4px);
}
.stat-item i {
  font-size: 1.6rem;
  color: #ffc46b;
  margin-bottom: 12px;
}
.stat-item strong {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}
.stat-item span {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.7);
}

/* ========== 使用流程 ========== */
.process-section {
  background: var(--bg);
}
.process-grid {
  margin: 0 -15px;
}
.process-item {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 34px 26px;
  transition: var(--transition);
  height: 100%;
}
.process-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.process-num {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  transition: var(--transition);
}
.process-item:hover .process-num {
  background: var(--primary);
  color: #fff;
}
.process-item h3 {
  font-size: 1.05rem;
  margin: 0 0 8px;
  font-weight: 700;
}
.process-item p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
  margin: 0;
}
.process-line {
  position: absolute;
  top: 56px;
  left: calc(50% + 40px);
  width: calc(100% - 80px);
  height: 2px;
  background: linear-gradient(90deg, var(--primary-light), var(--border), var(--border));
  display: none;
}
@media (min-width: 1024px) {
  .process-line {
    display: block;
  }
}

/* ========== 图文介绍 ========== */
.about-section {
  background: var(--surface);
}
.about-wrap {
  display: flex;
  gap: 60px;
  align-items: center;
}
.about-image {
  flex: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 360px;
}
.about-content {
  flex: 1;
}
.about-content .section-tag {
  margin-bottom: 10px;
}
.about-content h2 {
  font-size: 2.2rem;
  line-height: 1.3;
  font-weight: 800;
  margin: 0.5rem 0 1rem;
}
.about-content p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 18px;
}
.about-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.about-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text);
}
.about-list i {
  color: var(--primary);
  margin-top: 4px;
  flex-shrink: 0;
}

/* ========== FAQ ========== */
.faq-section {
  background: var(--bg);
}
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item[open] {
  box-shadow: var(--shadow);
  border-color: var(--primary);
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 22px 26px;
  font-size: 1.02rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: var(--transition);
  position: relative;
}
.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: 0.85rem;
  color: var(--text-muted);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item[open] summary::after {
  transform: rotate(180deg);
  color: var(--primary);
}
.faq-item summary:hover {
  color: var(--primary);
}
.faq-item[open] summary {
  color: var(--primary);
}
.faq-answer {
  padding: 0 26px 22px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
  border-top: 1px solid var(--border);
  padding-top: 16px;
  margin-top: 0;
}

/* ========== CTA ========== */
.cta-section {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: 5rem 0;
}
.cta-section::before,
.cta-section::after {
  content: '';
  position: absolute;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 50%;
}
.cta-section::before {
  width: 300px;
  height: 300px;
  top: -80px;
  left: -60px;
}
.cta-section::after {
  width: 360px;
  height: 360px;
  bottom: -120px;
  right: -80px;
}
.cta-inner {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: 2.4rem;
  color: #fff;
  margin: 0 0 14px;
  font-weight: 800;
}
.cta-inner p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.05rem;
  margin-bottom: 30px;
}
.cta-inner .btn {
  font-size: 1rem;
  padding: 14px 36px;
}

/* ========== 页脚 ========== */
.site-footer {
  background: #0d1b2a;
  color: rgba(255, 255, 255, 0.7);
  padding: 4rem 0 0;
}
.footer-grid {
  display: flex;
  gap: 40px;
  justify-content: space-between;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.footer-brand {
  max-width: 320px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}
.footer-logo span {
  color: var(--accent);
}
.footer-brand p {
  font-size: 0.92rem;
  line-height: 1.7;
  margin: 0;
}
.footer-col h4 {
  color: #fff;
  font-size: 1.05rem;
  margin: 0 0 16px;
  font-weight: 700;
}
.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-col a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.92rem;
  transition: var(--transition);
}
.footer-col a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.2rem 0;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}
.footer-bottom p {
  margin: 0;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }
  .section {
    padding: 4rem 0;
  }
  .hero h1 {
    font-size: 2.8rem;
  }
  .about-wrap {
    gap: 40px;
  }
  .about-content h2 {
    font-size: 1.8rem;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  .nav-search {
    display: none;
  }
  .main-nav {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-bottom: 1px solid var(--border);
    padding: 16px 20px;
    flex-direction: column;
    display: none;
    z-index: 999;
    border-radius: 0 0 var(--radius) var(--radius);
  }
  .main-nav.open {
    display: flex;
  }
  .main-nav ul {
    flex-direction: column;
    width: 100%;
    gap: 4px;
  }
  .main-nav a {
    width: 100%;
    text-align: center;
    padding: 12px 16px;
  }
  .hero {
    min-height: 520px;
  }
  .hero-inner {
    padding: 80px 0;
  }
  .hero h1 {
    font-size: 2.2rem;
  }
  .hero p {
    font-size: 1rem;
  }
  .hero-stats {
    gap: 20px;
  }
  .hero-stats strong {
    font-size: 1.4rem;
  }
  .about-wrap {
    flex-direction: column;
  }
  .about-image {
    width: 100%;
  }
  .cta-inner h2 {
    font-size: 1.8rem;
  }
  .footer-grid {
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .section {
    padding: 3rem 0;
  }
  .section-header h2 {
    font-size: 1.6rem;
  }
  .hero {
    min-height: 460px;
  }
  .hero-inner {
    padding: 60px 0;
  }
  .hero h1 {
    font-size: 1.8rem;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .brand-text {
    font-size: 1.15rem;
  }
  .faq-item summary {
    font-size: 0.95rem;
    padding: 18px 20px;
  }
  .faq-answer {
    padding: 0 20px 18px;
  }
  .process-item {
    padding: 24px 20px;
  }
  .stat-item strong {
    font-size: 1.5rem;
  }
}

/* roulang page: category1 */
:root {
  --primary: #0f2b5b;
  --primary-dark: #091d3d;
  --primary-light: #1a3f7a;
  --accent: #e8a33d;
  --accent-soft: #fdf4e5;
  --bg: #f0f4f9;
  --bg-deep: #e8edf4;
  --card-bg: #ffffff;
  --text: #182334;
  --text-weak: #5a6b85;
  --border: #e2e8f0;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(15, 43, 91, 0.05);
  --shadow-md: 0 6px 24px rgba(15, 43, 91, 0.08);
  --shadow-lg: 0 16px 48px rgba(15, 43, 91, 0.12);
  --space-sm: 12px;
  --space-md: 24px;
  --space-lg: 56px;
  --space-xl: 96px;
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--accent); }
ul, ol { list-style: none; }
button, input { font-family: inherit; }
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--card-bg);
  box-shadow: 0 2px 20px rgba(15, 43, 91, 0.08);
}
.header-top {
  background: var(--primary);
  color: #d6e0f0;
  font-size: 13px;
  height: 36px;
  display: flex;
  align-items: center;
}
.header-top .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}
.header-top a {
  color: #d6e0f0;
  margin-left: 20px;
  font-size: 13px;
}
.header-top a:hover { color: #ffffff; }
.header-top i { margin-right: 4px; font-size: 12px; }
.header-main {
  border-bottom: 1px solid var(--border);
}
.header-main .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 17px;
  box-shadow: 0 4px 12px rgba(15, 43, 91, 0.25);
}
.brand-text {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 1px;
}
.brand-text span { color: var(--accent); }
.main-nav ul {
  display: flex;
  gap: 8px;
}
.main-nav a {
  display: block;
  padding: 10px 22px;
  border-radius: 24px;
  color: var(--text);
  font-weight: 500;
  font-size: 15px;
}
.main-nav a:hover {
  background: var(--accent-soft);
  color: var(--primary);
}
.main-nav a.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(15, 43, 91, 0.25);
}
.nav-search {
  flex: 0 0 auto;
}
.nav-search form {
  display: flex;
  align-items: center;
  background: var(--bg);
  border-radius: 24px;
  border: 1px solid var(--border);
  padding: 4px 6px 4px 16px;
  transition: all .3s ease;
}
.nav-search form:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15, 43, 91, 0.1);
}
.nav-search input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 14px;
  width: 180px;
  color: var(--text);
}
.nav-search button {
  background: var(--primary);
  color: #fff;
  border: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s;
}
.nav-search button:hover { background: var(--accent); }
.nav-toggle { display: none; }

/* ===== Page Hero ===== */
.page-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  padding: 72px 0 84px;
  position: relative;
  overflow: hidden;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-blend-mode: overlay;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 43, 91, 0.92), rgba(26, 63, 122, 0.78));
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 {
  color: #fff;
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.page-hero p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 17px;
  max-width: 620px;
  line-height: 1.8;
}
.page-hero .hero-badge {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 6px 18px;
  border-radius: 30px;
  color: #fff;
  font-size: 13px;
  margin-bottom: 20px;
  backdrop-filter: blur(6px);
}
.page-hero .hero-badge i { color: var(--accent); margin-right: 6px; }

/* ===== Section base ===== */
.section {
  padding: var(--space-xl) 0;
}
.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-lg);
}
.section-head .tag {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 30px;
  margin-bottom: 14px;
  letter-spacing: 1px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}
.section-head p {
  color: var(--text-weak);
  font-size: 15px;
}

/* ===== Intro / Overview ===== */
.intro-section {
  background: var(--card-bg);
}
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.intro-text h3 {
  font-size: 26px;
  color: var(--primary);
  margin-bottom: 16px;
  font-weight: 700;
}
.intro-text p {
  color: var(--text-weak);
  font-size: 15px;
  margin-bottom: 16px;
  line-height: 1.9;
}
.intro-points {
  margin-top: 20px;
  display: grid;
  gap: 12px;
}
.intro-points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  background: var(--bg);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--accent);
  font-size: 14px;
  color: var(--text);
}
.intro-points i {
  color: var(--accent);
  font-size: 16px;
  margin-top: 2px;
}
.intro-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.intro-image img {
  width: 100%;
  height: 340px;
  object-fit: cover;
}
.intro-image .img-caption {
  position: absolute;
  bottom: 16px;
  left: 16px;
  right: 16px;
  background: rgba(15, 43, 91, 0.75);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  color: #fff;
  font-size: 14px;
  text-align: center;
}

/* ===== Steps ===== */
.steps-section {
  background: var(--bg);
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.step-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all .3s ease;
  position: relative;
}
.step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(15, 43, 91, 0.15);
}
.step-num {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--accent);
  font-size: 22px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 6px 16px rgba(15, 43, 91, 0.25);
}
.step-card h4 {
  color: var(--primary);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-card p {
  color: var(--text-weak);
  font-size: 14px;
  line-height: 1.7;
}
.step-card::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -14px;
  width: 16px;
  height: 16px;
  border-top: 2px solid var(--border);
  border-right: 2px solid var(--border);
  transform: translateY(-50%) rotate(45deg);
  z-index: 1;
  background: var(--bg);
}
.step-card:last-child::after { display: none; }

/* ===== Feature Cards ===== */
.feature-section {
  background: var(--card-bg);
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--card-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all .3s ease;
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}
.feature-card .cover {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.feature-card .cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.feature-card:hover .cover img { transform: scale(1.05); }
.feature-card .cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(15, 43, 91, 0.1), rgba(15, 43, 91, 0.35));
}
.feature-card .tag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px;
}
.feature-card .content {
  padding: 24px;
}
.feature-card .content h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}
.feature-card .content p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  margin-bottom: 14px;
}
.feature-card .content a {
  font-size: 14px;
  font-weight: 500;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.feature-card .content a i { font-size: 12px; transition: transform .2s; }
.feature-card .content a:hover i { transform: translateX(4px); }

/* ===== Tips ===== */
.tips-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.tips-section::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
}
.tips-section .section-head h2 { color: #fff; }
.tips-section .section-head p { color: rgba(255, 255, 255, 0.7); }
.tips-section .section-head .tag {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}
.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.tip-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  backdrop-filter: blur(6px);
  transition: background .3s;
}
.tip-item:hover {
  background: rgba(255, 255, 255, 0.1);
}
.tip-icon {
  width: 40px;
  height: 40px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
  font-size: 15px;
}
.tip-item h5 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
  color: #fff;
}
.tip-item p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg);
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}
.faq-item {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  padding: 22px 28px;
  box-shadow: var(--shadow-sm);
}
.faq-item h4 {
  font-size: 16px;
  color: var(--primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}
.faq-item h4 i {
  color: var(--accent);
  font-size: 14px;
  flex-shrink: 0;
}
.faq-item p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.8;
  padding-left: 28px;
}

/* ===== CTA ===== */
.cta-section {
  background: var(--card-bg);
  padding: 60px 0;
}
.cta-box {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  background-blend-mode: overlay;
}
.cta-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(15, 43, 91, 0.82);
}
.cta-box .cta-inner {
  position: relative;
  z-index: 1;
}
.cta-box h3 {
  color: #fff;
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-box p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 16px;
  max-width: 480px;
  margin: 0 auto 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: 30px;
  border: none;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all .3s ease;
  text-decoration: none;
}
.btn-accent {
  background: var(--accent);
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(232, 163, 61, 0.3);
}
.btn-accent:hover {
  background: #f5b24e;
  color: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(232, 163, 61, 0.4);
}
.btn-outline-light {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.6);
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
  transform: translateY(-3px);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--primary-dark);
  color: #b8c6dd;
  padding-top: 60px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: #fff !important;
  margin-bottom: 14px;
}
.footer-logo .brand-icon {
  background: rgba(255, 255, 255, 0.1);
  color: var(--accent);
}
.footer-logo span { color: var(--accent); }
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  opacity: 0.75;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 3px;
  background: var(--accent);
  border-radius: 3px;
}
.footer-col ul {
  display: grid;
  gap: 10px;
}
.footer-col a {
  color: #b8c6dd;
  font-size: 14px;
}
.footer-col a:hover { color: var(--accent); }
.footer-col i {
  margin-right: 6px;
  font-size: 13px;
  color: var(--accent);
}
.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  opacity: 0.6;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .intro-grid { gap: 32px; }
  .intro-image img { height: 280px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .step-card::after { display: none; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .tips-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .header-main .container { height: auto; flex-wrap: wrap; padding: 12px; }
  .main-nav {
    width: 100%;
    order: 3;
    display: none;
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: 4px; }
  .main-nav a { padding: 12px 16px; border-radius: 8px; }
  .nav-search { order: 2; flex: 1; }
  .nav-search form { width: 100%; }
  .nav-search input { width: 100%; }
  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    order: 2;
  }
  .nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: all .3s;
  }
  .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); }
  .header-top .container { flex-wrap: wrap; justify-content: center; gap: 4px; }
  .header-top .container span:last-child { display: none; }
  .page-hero { padding: 48px 0 60px; }
  .page-hero h1 { font-size: 32px; }
  .page-hero p { font-size: 15px; }
  .section { padding: 64px 0; }
  .intro-grid { grid-template-columns: 1fr; }
  .intro-image img { height: 220px; }
  .steps-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 26px; }
  .cta-box { padding: 40px 24px; }
  .cta-box h3 { font-size: 24px; }
  .faq-item { padding: 18px; }
  .tips-section { padding: 56px 0; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .header-main .container { gap: 12px; }
  .brand-text { font-size: 18px; }
  .page-hero h1 { font-size: 26px; }
  .nav-search { display: none; }
  .step-card { padding: 24px 18px; }
  .feature-card .cover { height: 160px; }
  .cta-box { padding: 30px 16px; }
  .cta-box h3 { font-size: 20px; }
}

/* roulang page: article */
:root {
  --primary: #0c1c3a;
  --primary-rgb: 12,28,58;
  --primary-light: #1b3a6b;
  --primary-dark: #070f20;
  --accent: #d99a3d;
  --accent-rgb: 217,154,61;
  --accent-hover: #bf8328;
  --accent-soft: #fdf5e8;
  --bg: #f4f6fb;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --text: #182238;
  --text-muted: #64748b;
  --border: #e4e9f2;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 10px rgba(var(--primary-rgb),0.06);
  --shadow: 0 12px 35px rgba(var(--primary-rgb),0.10);
  --shadow-lg: 0 24px 70px rgba(var(--primary-rgb),0.16);
  --transition: all 0.3s cubic-bezier(0.25,0.8,0.25,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  font-family:"PingFang SC","Microsoft YaHei",-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  font-size:16px;
}
a{color:inherit;text-decoration:none;transition:var(--transition);}
img{max-width:100%;height:auto;display:block;}
button,input,select,textarea{font-family:inherit;font-size:inherit;outline:none;}
ul,ol{list-style:none;}
.container{max-width:1200px;margin:0 auto;padding:0 25px;}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:500;width:100%;
  background:var(--surface);box-shadow:var(--shadow-sm);
  transition:var(--transition);
}
.site-header.scrolled{box-shadow:var(--shadow);}
.header-top{
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);
  color:rgba(255,255,255,0.88);font-size:13px;letter-spacing:0.3px;
}
.header-top .container{display:flex;justify-content:space-between;align-items:center;min-height:38px;}
.header-top a{color:rgba(255,255,255,0.85);margin-left:18px;transition:var(--transition);}
.header-top a:hover{color:var(--accent);}
.header-top i{margin-right:5px;}
.header-main .container{
  display:flex;align-items:center;justify-content:space-between;gap:22px;min-height:76px;flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:26px;color:var(--primary);line-height:1;}
.brand-icon{
  width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--accent) 0%,var(--accent-hover) 100%);
  color:#fff;font-size:18px;box-shadow:0 8px 20px rgba(var(--accent-rgb),0.35);
}
.brand-text{letter-spacing:-0.5px;}
.brand-text span{color:var(--accent);}
.main-nav ul{display:flex;gap:8px;list-style:none;}
.main-nav a{
  position:relative;display:block;padding:9px 18px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;color:var(--text);transition:var(--transition);
}
.main-nav a:hover{color:var(--accent);background:var(--accent-soft);}
.main-nav a.active{color:var(--accent);background:var(--accent-soft);}
.main-nav a.active::after{
  content:"";position:absolute;left:18px;right:18px;bottom:3px;height:2px;border-radius:2px;
  background:var(--accent);
}
.nav-search form{display:flex;align-items:center;background:var(--surface-alt);border:1px solid var(--border);border-radius:999px;padding:4px 6px;transition:var(--transition);}
.nav-search form:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(var(--accent-rgb),0.15);}
.nav-search input{border:none;background:transparent;padding:6px 12px;font-size:14px;color:var(--text);width:210px;border-radius:999px 0 0 999px;}
.nav-search button{
  width:36px;height:36px;border:none;border-radius:50%;background:var(--accent);color:#fff;
  font-size:14px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition);
}
.nav-search button:hover{background:var(--accent-hover);}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;border-radius:8px;}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--text);margin:5px 0;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);}

/* ===== Page Banner ===== */
.page-banner{
  position:relative;background-size:cover;background-position:center;color:#fff;
  padding:85px 0 70px;overflow:hidden;
}
.page-banner .banner-overlay{
  position:absolute;inset:0;background:linear-gradient(120deg,rgba(7,15,32,0.88) 0%,rgba(12,28,58,0.75) 55%,rgba(12,28,58,0.45) 100%);
}
.page-banner .container{position:relative;z-index:2;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;margin-bottom:18px;color:rgba(255,255,255,0.7);}
.breadcrumb a{color:rgba(255,255,255,0.8);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb i{font-size:11px;}
.page-banner h1{font-size:38px;font-weight:800;line-height:1.3;margin-bottom:14px;max-width:820px;letter-spacing:-0.5px;}
.banner-desc{font-size:16px;color:rgba(255,255,255,0.82);max-width:720px;line-height:1.8;}

/* ===== Article Section ===== */
.article-section{padding:55px 0 30px;}
.article-card{
  background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow);
  padding:42px 46px;border:1px solid rgba(255,255,255,0.6);
}
.article-meta{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-bottom:26px;padding-bottom:20px;border-bottom:1px solid var(--border);}
.badge{
  display:inline-flex;align-items:center;gap:5px;background:var(--accent-soft);color:var(--accent-hover);
  padding:6px 14px;border-radius:999px;font-size:13px;font-weight:700;
}
.meta-time{color:var(--text-muted);font-size:14px;display:flex;align-items:center;gap:6px;}

.article-body{font-size:16px;line-height:1.95;color:#26314a;}
.article-body h2{font-size:1.55rem;font-weight:800;color:var(--primary);margin:2rem 0 1rem;padding-bottom:0.5rem;border-bottom:2px solid var(--accent-soft);}
.article-body h3{font-size:1.25rem;font-weight:700;color:var(--primary-light);margin:1.75rem 0 0.8rem;}
.article-body p{margin-bottom:1.25rem;}
.article-body a{color:var(--accent-hover);font-weight:600;border-bottom:1px solid transparent;}
.article-body a:hover{border-color:var(--accent-hover);}
.article-body img{border-radius:var(--radius-md);margin:1.5rem 0;box-shadow:var(--shadow-sm);}
.article-body ul,.article-body ol{margin:1rem 0 1.25rem;padding-left:1.4rem;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:0.45rem;}
.article-body blockquote{
  border-left:4px solid var(--accent);background:var(--accent-soft);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:16px 20px;margin:1.5rem 0;color:#7a5d28;font-style:italic;
}
.article-body pre, .article-body code{
  font-family:"SFMono-Regular",Consolas,Menlo,monospace;background:#f0f2f7;border-radius:6px;
}
.article-body code{padding:2px 6px;font-size:0.9em;color:#c7254e;}
.article-body pre{padding:16px 20px;overflow-x:auto;margin:1.25rem 0;line-height:1.6;}
.article-body pre code{background:transparent;padding:0;color:#26314a;}
.article-body table{width:100%;border-collapse:collapse;margin:1.5rem 0;}
.article-body th,.article-body td{border:1px solid var(--border);padding:10px 14px;text-align:left;}
.article-body th{background:var(--surface-alt);font-weight:700;}

.article-tags{margin-top:32px;padding-top:20px;border-top:1px solid var(--border);display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.tag-chip{background:var(--surface-alt);border:1px solid var(--border);color:var(--text-muted);padding:4px 14px;border-radius:999px;font-size:13px;transition:var(--transition);}
.tag-chip:hover{border-color:var(--accent);color:var(--accent-hover);}

.not-found{
  text-align:center;padding:55px 20px;
}
.not-found i{font-size:52px;color:var(--accent);margin-bottom:16px;}
.not-found h2{font-size:26px;color:var(--primary);margin-bottom:12px;}
.not-found p{color:var(--text-muted);margin-bottom:24px;}

/* ===== Sidebar ===== */
.sidebar{display:flex;flex-direction:column;gap:24px;margin-bottom:32px;}
.sidebar-card{
  background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);
  overflow:hidden;border:1px solid var(--border);transition:var(--transition);
}
.sidebar-card:hover{box-shadow:var(--shadow);transform:translateY(-3px);}
.sidebar-cover{width:100%;height:150px;object-fit:cover;}
.sidebar-profile-body{padding:20px 22px;}
.sidebar-profile-body h4{font-size:18px;font-weight:800;color:var(--primary);margin-bottom:8px;}
.sidebar-profile-body p{font-size:14px;color:var(--text-muted);line-height:1.7;margin-bottom:16px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 24px;border-radius:999px;font-size:14px;font-weight:700;
  cursor:pointer;border:none;transition:var(--transition);line-height:1.4;
}
.btn-block{display:flex;width:100%;}
.btn-outline{border:2px solid var(--primary);color:var(--primary);background:transparent;}
.btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-2px);}
.btn-gold{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(var(--accent-rgb),0.35);}
.btn-gold:hover{background:var(--accent-hover);transform:translateY(-2px);}
.btn-sm{padding:8px 20px;font-size:13px;}
.btn-light{background:#fff;color:var(--primary);box-shadow:0 8px 25px rgba(0,0,0,0.12);}
.btn-light:hover{background:var(--accent-soft);color:var(--accent-hover);transform:translateY(-2px);}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-light);transform:translateY(-2px);}

.sidebar-title{
  display:flex;align-items:center;gap:8px;font-size:16px;font-weight:800;color:var(--primary);
  padding:18px 20px 12px;border-bottom:1px solid var(--border);
}
.sidebar-title i{color:var(--accent);}
.category-list{padding:10px 20px 18px;}
.category-list li{margin-bottom:4px;}
.category-list a{
  display:flex;align-items:center;justify-content:space-between;padding:10px 12px;
  border-radius:10px;color:var(--text);font-size:14px;font-weight:600;transition:var(--transition);
}
.category-list a:hover{background:var(--accent-soft);color:var(--accent-hover);padding-left:16px;}
.badge-count{
  background:var(--surface-alt);border-radius:6px;padding:2px 9px;font-size:12px;color:var(--text-muted);
}
.sidebar-promo{position:relative;}
.sidebar-promo img{width:100%;height:130px;object-fit:cover;}
.sidebar-promo .promo-body{
  position:absolute;bottom:0;left:0;right:0;padding:16px 20px;background:linear-gradient(to top,rgba(7,15,32,0.82),rgba(7,15,32,0.15));
  color:#fff;display:flex;align-items:center;justify-content:space-between;gap:10px;
}
.promo-body p{font-size:14px;font-weight:700;}

/* ===== Topics Section ===== */
.topics-section{padding:60px 0;}
.section-tag{
  display:inline-block;background:var(--accent-soft);color:var(--accent-hover);
  padding:4px 16px;border-radius:999px;font-size:13px;font-weight:800;letter-spacing:1px;margin-bottom:12px;
}
.section-head{text-align:center;max-width:680px;margin:0 auto 42px;}
.section-head h2{font-size:32px;font-weight:800;color:var(--primary);margin-bottom:10px;letter-spacing:-0.5px;}
.section-head p{color:var(--text-muted);font-size:15px;}
.topic-card{
  background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);overflow:hidden;
  border:1px solid var(--border);transition:var(--transition);height:100%;display:flex;flex-direction:column;
}
.topic-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-6px);border-color:rgba(var(--accent-rgb),0.4);}
.topic-card .topic-img{position:relative;overflow:hidden;height:170px;}
.topic-card .topic-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s ease;}
.topic-card:hover .topic-img img{transform:scale(1.06);}
.topic-card .topic-img::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(7,15,32,0.30),transparent 60%);}
.topic-body{padding:22px 24px;flex:1;display:flex;flex-direction:column;}
.topic-body .topic-badge{
  align-self:flex-start;background:var(--accent-soft);color:var(--accent-hover);font-size:12px;font-weight:700;
  padding:3px 12px;border-radius:999px;margin-bottom:12px;
}
.topic-body h3{font-size:19px;font-weight:800;color:var(--primary);margin-bottom:8px;}
.topic-body p{font-size:14px;color:var(--text-muted);line-height:1.7;flex:1;}
.topic-link{
  margin-top:16px;display:inline-flex;align-items:center;gap:6px;color:var(--accent-hover);
  font-size:14px;font-weight:700;
}
.topic-link i{transition:transform 0.3s;}
.topic-link:hover i{transform:translateX(4px);}

/* ===== FAQ ===== */
.faq-section{padding:60px 0;background:var(--surface);}
.faq-item{
  background:var(--bg);border-radius:var(--radius-md);border:1px solid var(--border);
  margin-bottom:14px;overflow:hidden;transition:var(--transition);
}
.faq-item:hover{border-color:rgba(var(--accent-rgb),0.4);}
.faq-question{
  width:100%;background:none;border:none;text-align:left;padding:18px 22px;
  font-size:15px;font-weight:700;color:var(--text);cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:14px;transition:var(--transition);
}
.faq-question i{color:var(--accent);font-size:14px;transition:transform 0.3s;flex-shrink:0;}
.faq-item.active .faq-question i{transform:rotate(180deg);}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.4s ease;padding:0 22px;color:var(--text-muted);font-size:14px;line-height:1.8;}
.faq-item.active .faq-answer{max-height:220px;padding-bottom:18px;}

/* ===== CTA ===== */
.cta-section{padding:55px 0;}
.cta-box{
  background:linear-gradient(120deg,var(--primary) 0%,var(--primary-light) 70%,var(--primary) 100%);
  border-radius:var(--radius-lg);padding:44px 50px;color:#fff;box-shadow:var(--shadow-lg);
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;position:relative;overflow:hidden;
}
.cta-box::before{
  content:"";position:absolute;top:-60px;right:-60px;width:180px;height:180px;border-radius:50%;
  background:rgba(var(--accent-rgb),0.18);pointer-events:none;
}
.cta-box h2{font-size:24px;font-weight:800;margin-bottom:6px;}
.cta-box p{color:rgba(255,255,255,0.8);font-size:15px;}

/* ===== Footer ===== */
.site-footer{background:var(--primary-dark);color:rgba(255,255,255,0.8);padding-top:60px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;}
.footer-logo{display:flex;align-items:center;gap:8px;color:#fff;font-size:22px;font-weight:800;margin-bottom:14px;}
.footer-logo .brand-icon{width:36px;height:36px;font-size:15px;border-radius:10px;}
.footer-logo span{color:var(--accent);}
.footer-brand p{font-size:14px;color:rgba(255,255,255,0.6);line-height:1.8;max-width:320px;}
.footer-col h4{color:#fff;font-size:17px;font-weight:800;margin-bottom:18px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{color:rgba(255,255,255,0.65);font-size:14px;display:flex;align-items:center;gap:8px;transition:var(--transition);}
.footer-col a:hover{color:var(--accent);padding-left:4px;}
.footer-col ul li i{color:var(--accent);font-size:12px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.1);padding:18px 0;text-align:center;
  color:rgba(255,255,255,0.4);font-size:13px;
}

/* ===== Responsive ===== */
@media screen and (max-width:1024px){
  .main-nav{order:3;flex-basis:100%;}
  .main-nav ul{justify-content:center;flex-wrap:wrap;}
  .nav-search{order:2;}
  .page-banner h1{font-size:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media screen and (max-width:768px){
  .header-main .container{min-height:64px;}
  .nav-search{display:none;}
  .nav-toggle{display:block;}
  .main-nav{
    display:none;position:absolute;top:calc(100% + 0px);left:0;right:0;background:var(--surface);
    box-shadow:var(--shadow-lg);border-top:1px solid var(--border);padding:14px;border-radius:0 0 var(--radius-md) var(--radius-md);
  }
  .main-nav.open{display:block;}
  .main-nav ul{flex-direction:column;gap:4px;}
  .main-nav a{padding:13px 18px;border-radius:10px;font-size:15px;}
  .main-nav a.active::after{display:none;}
  .page-banner{padding:55px 0 42px;}
  .page-banner h1{font-size:26px;}
  .banner-desc{font-size:14px;}
  .article-card{padding:28px 22px;}
  .article-body{font-size:15px;}
  .cta-box{padding:34px 26px;flex-direction:column;text-align:center;}
  .sidebar{margin-top:32px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .container{padding:0 18px;}
}
@media screen and (max-width:520px){
  .header-top .container{justify-content:center;flex-wrap:wrap;gap:4px;padding:6px 10px;}
  .header-top .container span:first-child{display:none;}
  .brand{font-size:22px;}
  .brand-icon{width:36px;height:36px;font-size:15px;border-radius:10px;}
  .page-banner h1{font-size:22px;}
  .article-card{padding:22px 16px;border-radius:16px;}
  .article-meta{gap:10px;}
  .section-head h2{font-size:25px;}
  .topic-card .topic-img{height:150px;}
}