/* roulang page: index */
:root {
  --primary: #1A6B8A;
  --primary-dark: #145870;
  --primary-light: #E8F2F6;
  --accent: #E8734A;
  --accent-dark: #D16038;
  --bg-light: #F5F8FA;
  --white: #FFFFFF;
  --text-dark: #2B3A42;
  --text-mid: #6B7B84;
  --text-weak: #9AA7AD;
  --border: #E3E9ED;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --shadow-card: 0 4px 12px rgba(26, 43, 58, 0.06);
  --shadow-hover: 0 8px 24px rgba(26, 43, 58, 0.10);
  --shadow-btn: 0 4px 10px rgba(26, 107, 138, 0.18);
  --transition: 0.2s ease;
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.8;
  font-size: 16px;
  padding-bottom: 64px;
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--primary-dark); text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font-family: inherit; }
h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; color: var(--text-dark); }
.container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }
.section { padding: 96px 0; }

/* ========== Header / Nav ========== */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.site-header .navbar {
  min-height: 72px;
  padding: 0 12px;
  background: transparent;
}
.navbar-brand {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: 0.5px;
  padding: 0;
}
.navbar-brand:hover { color: var(--primary); }
.navbar-nav { gap: 8px; }
.navbar .nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-mid);
  padding: 10px 18px;
  letter-spacing: 0.5px;
  transition: color var(--transition);
}
.navbar .nav-link::before {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary);
  opacity: 0.3;
  border-radius: 2px;
  transition: width var(--transition);
}
.navbar .nav-link:hover { color: var(--primary-dark); }
.navbar .nav-link:hover::before { width: 24px; }
.navbar .nav-link.active {
  color: var(--primary);
  font-weight: 600;
}
.navbar .nav-link.active::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 24px;
  height: 4px;
  background: var(--primary);
  border-radius: 4px;
}
.navbar .navbar-toggler {
  border: none;
  padding: 6px 10px;
  outline: none;
  box-shadow: none;
}
.navbar .navbar-toggler:focus { box-shadow: none; }
.navbar .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(26,107,138,0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ========== Buttons ========== */
.btn-main {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 28px;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.4;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.btn-main:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-btn);
}
.btn-main:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(26, 107, 138, 0.22);
}
.btn-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 28px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.btn-accent:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(232, 115, 74, 0.25);
}
.btn-accent:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(232, 115, 74, 0.25);
}
.btn-link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 500;
  color: var(--primary);
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.btn-link-more:hover { color: var(--primary-dark); border-color: var(--primary-dark); }
.btn-link-more i { font-size: 13px; transition: transform var(--transition); }
.btn-link-more:hover i { transform: translateX(4px); }

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 75vh;
  display: flex;
  align-items: center;
  background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat, var(--bg-light);
  overflow: hidden;
  padding: 80px 0;
}
.hero::before {
  content: '';
  position: absolute;
  right: -120px;
  top: -120px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  border: 50px solid rgba(26, 107, 138, 0.05);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  left: -140px;
  bottom: -180px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  border: 36px solid rgba(232, 115, 74, 0.05);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 2; }
.hero .row { align-items: center; }
.hero-content { position: relative; z-index: 2; }
.hero-title {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-dark);
  margin-bottom: 18px;
  letter-spacing: 1px;
}
.hero-title .brand { color: var(--primary); }
.hero-divider {
  width: 48px;
  height: 4px;
  background: var(--accent);
  border-radius: 4px;
  margin: 0 0 24px;
}
.hero-subtitle {
  font-size: 18px;
  color: var(--text-mid);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 520px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.hero-tags .tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 7px 18px;
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
  box-shadow: var(--shadow-card);
}
.hero-tags .tag i { font-size: 13px; }
.hero-visual {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-image-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  max-width: 440px;
}
.hero-image-wrap img {
  width: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
  aspect-ratio: 4 / 3;
}
.hero-image-badge {
  position: absolute;
  left: 16px;
  bottom: 16px;
  background: rgba(255, 255, 255, 0.92);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  font-size: 14px;
  color: var(--text-dark);
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-image-badge i { color: var(--accent); }

/* ========== Features ========== */
.features-section { padding-top: 96px; padding-bottom: 96px; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-head h2 {
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 12px;
}
.section-head p {
  font-size: 16px;
  color: var(--text-mid);
  max-width: 640px;
  margin: 0 auto;
}
.feature-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 40px 32px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.feature-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(26, 107, 138, 0.25);
  transform: translateY(-2px);
}
.feature-card.featured {
  background: var(--primary-light);
  border-color: rgba(26, 107, 138, 0.15);
}
.feature-card .feature-top-line {
  position: absolute;
  top: 0;
  left: 32px;
  right: 32px;
  height: 4px;
  border-radius: 0 0 4px 4px;
  background: var(--primary);
  opacity: 0.7;
}
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 22px;
  transition: background var(--transition), color var(--transition);
}
.feature-card:hover .feature-icon {
  background: var(--white);
  color: var(--primary);
}
.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}
.feature-card p {
  font-size: 15px;
  color: var(--text-mid);
  line-height: 1.7;
  margin-bottom: 24px;
  flex-grow: 1;
}
.feature-card .btn-link-more { margin-top: auto; }

/* ========== Scene ========== */
.scene-section {
  background: var(--white);
  padding-top: 96px;
  padding-bottom: 96px;
}
.scene-content h2 {
  font-size: 30px;
  font-weight: 600;
  margin-bottom: 16px;
}
.scene-content > p {
  font-size: 16px;
  color: var(--text-mid);
  margin-bottom: 12px;
  max-width: 480px;
}
.scene-points { list-style: none; padding: 0; margin: 24px 0 32px; }
.scene-points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  font-size: 15px;
  color: var(--text-dark);
}
.scene-points li i {
  color: var(--accent);
  font-size: 16px;
  margin-top: 4px;
  flex-shrink: 0;
}
.scene-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}
.scene-visual img {
  width: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
  aspect-ratio: 16 / 10;
}
.scene-info {
  position: absolute;
  left: 20px;
  bottom: 20px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  font-size: 14px;
  color: var(--text-dark);
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  gap: 8px;
}
.scene-info i { color: var(--primary); }

/* ========== Stats & Reviews ========== */
.stats-section {
  background: var(--bg-light);
  padding-top: 96px;
  padding-bottom: 96px;
}
.stats-row { margin-bottom: 40px; }
.stat-item {
  text-align: center;
  padding: 24px 16px;
}
.stat-number {
  font-size: 36px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 4px;
}
.stat-label {
  font-size: 15px;
  color: var(--text-mid);
}
.reviews-row { gap: 24px; }
.review-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 28px 24px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition), transform var(--transition);
  height: 100%;
}
.review-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.review-card .quote-icon {
  font-size: 28px;
  color: var(--accent);
  margin-bottom: 14px;
}
.review-card .review-text {
  font-size: 15px;
  color: var(--text-dark);
  line-height: 1.8;
  margin-bottom: 18px;
}
.review-card .review-author {
  font-size: 14px;
  color: var(--text-weak);
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

/* ========== News ========== */
.news-section { padding-top: 96px; padding-bottom: 96px; }
.news-list { display: flex; flex-direction: column; }
.news-item {
  display: flex;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.news-item:first-child { padding-top: 0; }
.news-item:hover { background: rgba(245, 248, 250, 0.6); }
.news-thumb {
  flex-shrink: 0;
  width: 180px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-sm);
  transition: transform var(--transition);
}
.news-item:hover .news-thumb img { transform: scale(1.03); }
.news-body { flex: 1; min-width: 0; }
.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.news-badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-pill);
  padding: 3px 12px;
}
.news-date {
  font-size: 14px;
  color: var(--text-weak);
}
.news-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}
.news-title a { color: var(--text-dark); }
.news-title a:hover { color: var(--primary); }
.news-summary {
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.6;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-more {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.news-more i { font-size: 12px; transition: transform var(--transition); }
.news-more:hover i { transform: translateX(3px); }
.news-sidebar {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-card);
  position: sticky;
  top: 96px;
}
.news-sidebar img {
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.news-sidebar h3 {
  font-size: 20px;
  margin-bottom: 10px;
}
.news-sidebar p {
  font-size: 15px;
  color: var(--text-mid);
  margin-bottom: 20px;
}
.empty-text {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-weak);
  font-size: 15px;
  background: var(--white);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
}

/* ========== FAQ ========== */
.faq-section { background: var(--white); padding-top: 96px; padding-bottom: 96px; }
.accordion { max-width: 860px; margin: 0 auto; }
.accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md) !important;
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  background: var(--white);
}
.accordion-header { border: none; }
.accordion-button {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-dark);
  padding: 20px 24px;
  background: var(--white);
  border: none;
  transition: color var(--transition), background var(--transition);
}
.accordion-button:hover { background: var(--bg-light); }
.accordion-button:not(.collapsed) {
  color: var(--primary);
  background: var(--white);
  box-shadow: none;
}
.accordion-button:focus { box-shadow: none; border-color: transparent; }
.accordion-button::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%231A6B8A'%3e%3cpath fill-rule='evenodd' d='M8 2a.75.75 0 0 1 .75.75v4.5h4.5a.75.75 0 0 1 0 1.5h-4.5v4.5a.75.75 0 0 1-1.5 0v-4.5h-4.5a.75.75 0 0 1 0-1.5h4.5v-4.5A.75.75 0 0 1 8 2Z'/%3e%3c/svg%3e");
  background-size: 16px;
}
.accordion-button:not(.collapsed)::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23E8734A'%3e%3cpath fill-rule='evenodd' d='M2 8a.75.75 0 0 1 .75-.75h10.5a.75.75 0 0 1 0 1.5H2.75A.75.75 0 0 1 2 8Z'/%3e%3c/svg%3e");
}
.accordion-body {
  padding: 0 24px 24px;
  font-size: 15px;
  color: var(--text-mid);
  line-height: 1.8;
  border-top: 1px solid var(--border);
}

/* ========== CTA Card ========== */
.cta-section { padding-top: 96px; padding-bottom: 96px; }
.cta-card {
  background: var(--primary);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-card::after {
  content: '';
  position: absolute;
  right: -60px;
  top: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 24px solid rgba(255, 255, 255, 0.08);
}
.cta-card .cta-text h2 {
  color: #fff;
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 8px;
}
.cta-card .cta-text p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 16px;
  margin-bottom: 0;
}
.cta-card .btn-accent { position: relative; z-index: 2; flex-shrink: 0; }

/* ========== Bottom Fixed CTA ========== */
.bottom-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1050;
  background: #143947;
  color: #fff;
  min-height: 64px;
  display: flex;
  align-items: center;
  padding: 10px 24px;
  box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.08);
}
.bottom-cta .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.bottom-cta .cta-text {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 0;
}
.bottom-cta .btn-accent { padding: 10px 24px; font-size: 15px; flex-shrink: 0; }
.bottom-cta .close-cta {
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.5);
  font-size: 18px;
  cursor: pointer;
  padding: 6px 10px;
  margin-left: 4px;
  transition: color var(--transition);
}
.bottom-cta .close-cta:hover { color: #fff; }

/* ========== Footer ========== */
.site-footer {
  background: var(--white);
  border-top: 1px solid var(--border);
  padding-top: 48px;
  padding-bottom: 32px;
}
.footer-brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}
.footer-desc {
  font-size: 15px;
  color: var(--text-mid);
  max-width: 260px;
  margin-bottom: 0;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-dark);
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 15px;
  color: var(--text-mid);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--accent); }
.footer-col .contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--text-mid);
  margin-bottom: 12px;
}
.footer-col .contact-item i { color: var(--primary); margin-top: 5px; font-size: 14px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-light);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-mid);
  font-size: 15px;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.footer-social a:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.footer-bottom {
  border-top: 1px solid var(--border);
  margin-top: 40px;
  padding-top: 20px;
  text-align: center;
}
.footer-bottom p {
  font-size: 14px;
  color: var(--text-weak);
  margin-bottom: 0;
}

/* ========== Responsive ========== */
@media (max-width: 991px) {
  .navbar-collapse {
    background: var(--white);
    border-top: 1px solid var(--border);
    margin-top: 8px;
    padding: 8px 0 12px;
  }
  .navbar-nav { gap: 0; }
  .navbar .nav-link {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
  }
  .navbar .nav-link:last-child { border-bottom: none; }
  .navbar .nav-link.active::after { display: none; }
  .navbar .nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    top: 0;
    width: 4px;
    height: auto;
    transform: none;
    background: var(--primary);
    opacity: 0.8;
    border-radius: 0;
  }
  .hero { min-height: auto; padding: 60px 0; }
  .hero-title { font-size: 36px; }
  .hero-visual { margin-top: 48px; }
  .scene-content { margin-bottom: 40px; }
  .section { padding-top: 72px; padding-bottom: 72px; }
}
@media (max-width: 767px) {
  body { padding-bottom: 72px; }
  .section { padding-top: 56px; padding-bottom: 56px; }
  .hero { padding: 48px 0; }
  .hero-title { font-size: 28px; }
  .hero-subtitle { font-size: 16px; }
  .hero-actions { gap: 12px; }
  .btn-main, .btn-accent { width: 100%; }
  .hero-tags { flex-direction: column; align-items: flex-start; }
  .hero-tags .tag { width: 100%; justify-content: center; }
  .feature-card { margin-bottom: 24px; }
  .news-item { flex-direction: column; }
  .news-thumb { width: 100%; }
  .news-thumb img { aspect-ratio: 16 / 9; }
  .scene-visual img { aspect-ratio: 4 / 3; }
  .stat-number { font-size: 30px; }
  .cta-card { padding: 36px 28px; }
  .cta-card .cta-text h2 { font-size: 24px; }
  .footer-col { margin-bottom: 32px; }
  .bottom-cta { background: var(--white); color: var(--text-dark); border-top: 1px solid var(--border); }
  .bottom-cta .cta-text { color: var(--text-dark); font-size: 14px; }
  .bottom-cta .btn-accent { width: auto; padding: 10px 18px; font-size: 14px; }
  .bottom-cta .close-cta { color: var(--text-weak); }
}
@media (max-width: 575px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .navbar-brand { font-size: 18px; }
  .section-head h2 { font-size: 26px; }
  .cta-card { padding: 28px 20px; }
  .footer-bottom p { font-size: 13px; }
}
@media (min-width: 992px) {
  .navbar .nav-link { margin-top: 4px; }
}

/* roulang page: category1 */
:root{
  --primary:#1A6B8A;
  --primary-light:#2A7FA1;
  --primary-dark:#145A75;
  --primary-soft:#E9F2F6;
  --accent:#E8734A;
  --accent-dark:#d0603a;
  --bg-main:#F5F8FA;
  --bg-white:#FFFFFF;
  --text-main:#2B3A42;
  --text-sub:#6B7B84;
  --text-weak:#9AA7AD;
  --border:#E3E9ED;
  --shadow-sm:0 4px 12px rgba(26,43,58,0.06);
  --shadow-hover:0 8px 24px rgba(26,43,58,0.10);
  --radius-card:8px;
  --radius-btn:6px;
  --radius-cap:999px;
  --font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
html{
  scroll-behavior:smooth;
}
body{
  font-family:var(--font-family);
  background:var(--bg-main);
  color:var(--text-main);
  line-height:1.8;
  font-size:16px;
  overflow-x:hidden;
}
*,*::before,*::after{
  box-sizing:border-box;
}
h1,h2,h3,h4,h5,h6{
  color:var(--text-main);
  font-weight:600;
  line-height:1.35;
  margin:0 0 0.5rem;
}
p{
  margin:0 0 1rem;
}
a{
  color:var(--primary);
  text-decoration:none;
  transition:color 0.2s ease;
}
a:hover{
  color:var(--primary-dark);
}
img{
  max-width:100%;
  height:auto;
}
button{
  font-family:var(--font-family);
}
.btn{
  border-radius:var(--radius-btn);
  font-size:16px;
  font-weight:500;
  padding:12px 24px;
  transition:all 0.2s ease;
  border:0;
}
.btn:focus,
.btn:focus-visible{
  box-shadow:0 0 0 3px rgba(26,107,138,0.15);
  outline:none;
}
.btn-primary{
  background:var(--primary);
  color:#fff;
}
.btn-primary:hover{
  background:var(--primary-dark);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:0 6px 16px rgba(26,107,138,0.22);
}
.btn-accent{
  background:var(--accent);
  color:#fff;
}
.btn-accent:hover{
  background:var(--accent-dark);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:0 6px 16px rgba(232,115,74,0.25);
}
.btn-light-line{
  background:transparent;
  color:#fff;
  border:1px solid rgba(255,255,255,0.6);
}
.btn-light-line:hover{
  background:rgba(255,255,255,0.1);
  color:#fff;
  border-color:#fff;
}

/* 导航 */
.site-header{
  background:var(--bg-white);
  border-bottom:1px solid var(--border);
}
.site-header .navbar{
  padding:0;
  min-height:72px;
}
.site-header .navbar-brand{
  font-size:22px;
  font-weight:700;
  color:var(--primary);
  letter-spacing:0.5px;
  padding:0;
}
.site-header .navbar-brand:hover{
  color:var(--primary-dark);
}
.site-header .navbar-nav{
  gap:6px;
}
.site-header .nav-link{
  font-size:15px;
  color:var(--text-main);
  padding:10px 16px;
  letter-spacing:0.3px;
  position:relative;
}
.site-header .nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:0;
  transform:translateX(-50%);
  width:0;
  height:4px;
  border-radius:2px;
  background:var(--primary);
  transition:width 0.25s ease;
}
.site-header .nav-link:hover{
  color:var(--primary);
}
.site-header .nav-link:hover::after{
  width:28px;
}
.site-header .nav-link.active{
  color:var(--primary);
  font-weight:500;
}
.site-header .nav-link.active::after{
  width:28px;
}
.site-header .navbar-toggler{
  border:none;
  padding:8px;
}
.site-header .navbar-toggler:focus{
  box-shadow:none;
}
.site-header .navbar-toggler-icon{
  width:22px;
  height:22px;
  background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(26,107,138,1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Hero */
.page-hero{
  background:var(--bg-main);
  padding:80px 0 72px;
  border-bottom:1px solid var(--border);
}
.breadcrumb{
  margin-bottom:20px;
}
.breadcrumb-item{
  font-size:14px;
  color:var(--text-weak);
}
.breadcrumb-item a{
  color:var(--text-sub);
}
.breadcrumb-item a:hover{
  color:var(--primary);
}
.breadcrumb-item.active{
  color:var(--text-main);
}
.breadcrumb-item+.breadcrumb-item::before{
  content:"/";
  color:var(--border);
}
.hero-title{
  font-size:42px;
  font-weight:700;
  color:var(--text-main);
  margin-bottom:16px;
  letter-spacing:0.3px;
}
.hero-subtitle{
  font-size:17px;
  color:var(--text-sub);
  line-height:1.8;
  max-width:540px;
  margin-bottom:28px;
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:32px;
}
.hero-tags .tag{
  display:inline-block;
  padding:6px 16px;
  background:var(--bg-white);
  border:1px solid var(--border);
  border-radius:var(--radius-cap);
  font-size:13px;
  color:var(--text-sub);
  letter-spacing:0.3px;
}
.hero-actions{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:16px;
}
.hero-link{
  font-size:15px;
  font-weight:500;
  color:var(--primary);
  white-space:nowrap;
}
.hero-link i{
  font-size:13px;
  margin-left:4px;
  transition:transform 0.2s ease;
}
.hero-link:hover i{
  transform:translateX(4px);
}
.hero-visual{
  position:relative;
}
.hero-visual img{
  width:100%;
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-hover);
  border:1px solid var(--border);
}
.hero-visual .float-tag{
  position:absolute;
  top:20px;
  left:-14px;
  background:var(--accent);
  color:#fff;
  padding:8px 16px;
  border-radius:var(--radius-cap);
  font-size:13px;
  font-weight:500;
  box-shadow:0 4px 12px rgba(232,115,74,0.30);
  letter-spacing:0.5px;
}
.hero-visual .float-note{
  position:absolute;
  bottom:16px;
  right:16px;
  background:rgba(255,255,255,0.92);
  border:1px solid var(--border);
  padding:10px 18px;
  border-radius:var(--radius-card);
  font-size:13px;
  color:var(--text-main);
  box-shadow:var(--shadow-sm);
}

/* Section */
.section{
  padding:96px 0;
}
.section.bg-soft{
  background:var(--bg-main);
}
.section.bg-white{
  background:var(--bg-white);
}
.section-head{
  text-align:center;
  max-width:680px;
  margin:0 auto 56px;
}
.section-head .section-title{
  font-size:32px;
  font-weight:600;
  margin-bottom:14px;
}
.section-head .section-desc{
  font-size:16px;
  color:var(--text-sub);
  line-height:1.8;
}

/* 核心服务卡片 */
.service-cards{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:32px;
}
.service-card{
  background:var(--bg-white);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:36px 32px;
  box-shadow:var(--shadow-sm);
  transition:box-shadow 0.25s ease,border-color 0.25s ease,transform 0.25s ease;
  position:relative;
}
.service-card::before{
  content:"";
  position:absolute;
  top:0;
  left:32px;
  right:32px;
  height:3px;
  border-radius:2px;
  background:var(--primary);
  opacity:0;
  transition:opacity 0.25s ease;
}
.service-card:hover{
  box-shadow:var(--shadow-hover);
  border-color:rgba(26,107,138,0.20);
  transform:translateY(-4px);
}
.service-card:hover::before{
  opacity:1;
}
.service-card.featured{
  background:var(--primary-soft);
  border-color:rgba(26,107,138,0.10);
}
.service-card.featured::before{
  opacity:1;
  background:var(--accent);
}
.service-icon{
  width:56px;
  height:56px;
  border-radius:12px;
  background:var(--primary-soft);
  color:var(--primary);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:24px;
  margin-bottom:20px;
  transition:background 0.2s ease;
}
.service-card.featured .service-icon{
  background:var(--bg-white);
}
.service-card h3{
  font-size:19px;
  font-weight:600;
  margin-bottom:10px;
}
.service-card p{
  font-size:15px;
  color:var(--text-sub);
  line-height:1.75;
  margin-bottom:18px;
}
.service-link{
  font-size:14px;
  font-weight:500;
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.service-link i{
  font-size:12px;
  transition:transform 0.2s ease;
}
.service-link:hover i{
  transform:translateX(4px);
}

/* 适用场景 */
.scene-wrap{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
}
.scene-image{
  position:relative;
}
.scene-image img{
  width:100%;
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-hover);
  border:1px solid var(--border);
}
.scene-image .scene-info{
  position:absolute;
  bottom:20px;
  left:20px;
  background:rgba(255,255,255,0.95);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:12px 20px;
  font-size:13px;
  color:var(--text-main);
  box-shadow:var(--shadow-sm);
}
.scene-info i{
  color:var(--accent);
  margin-right:6px;
}
.scene-content h2{
  font-size:30px;
  font-weight:600;
  margin-bottom:16px;
}
.scene-content .scene-text{
  font-size:16px;
  color:var(--text-sub);
  line-height:1.8;
  margin-bottom:24px;
}
.scene-list{
  list-style:none;
  padding:0;
  margin:0 0 28px;
}
.scene-list li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  padding:8px 0;
  font-size:15px;
  color:var(--text-main);
}
.scene-list li i{
  color:var(--primary);
  margin-top:5px;
  font-size:14px;
  flex-shrink:0;
}
.scene-link{
  font-size:15px;
  font-weight:500;
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.scene-link i{
  font-size:13px;
  transition:transform 0.2s ease;
}
.scene-link:hover i{
  transform:translateX(4px);
}

/* 流程 */
.process-section{
  background:var(--bg-white);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.process-steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:32px;
}
.process-step{
  text-align:center;
  padding:8px;
}
.step-num{
  width:56px;
  height:56px;
  margin:0 auto 18px;
  border-radius:50%;
  background:var(--primary-soft);
  color:var(--primary);
  font-size:20px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
}
.process-step h3{
  font-size:18px;
  font-weight:600;
  margin-bottom:10px;
}
.process-step p{
  font-size:14px;
  color:var(--text-sub);
  line-height:1.7;
  max-width:220px;
  margin:0 auto;
}

/* 数据指标 */
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:32px;
}
.stat-item{
  text-align:center;
  padding:32px 16px;
  background:var(--bg-white);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  transition:box-shadow 0.2s ease;
}
.stat-item:hover{
  box-shadow:var(--shadow-hover);
}
.stat-num{
  font-size:38px;
  font-weight:700;
  color:var(--primary);
  line-height:1.2;
  margin-bottom:8px;
}
.stat-label{
  font-size:14px;
  color:var(--text-sub);
  letter-spacing:0.3px;
}

/* FAQ */
.faq-wrap{
  max-width:800px;
  margin:0 auto;
}
.accordion-item{
  border:1px solid var(--border);
  border-radius:var(--radius-card) !important;
  margin-bottom:16px;
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  background:var(--bg-white);
}
.accordion-item:last-child{
  margin-bottom:0;
}
.accordion-header .accordion-button{
  font-size:16px;
  font-weight:500;
  color:var(--text-main);
  padding:18px 24px;
  background:var(--bg-white);
  border:none;
  box-shadow:none;
  min-height:56px;
}
.accordion-header .accordion-button:not(.collapsed){
  background:var(--primary-soft);
  color:var(--primary);
  font-weight:600;
}
.accordion-header .accordion-button:focus{
  box-shadow:none;
  border:none;
}
.accordion-header .accordion-button::after{
  background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%231A6B8A'%3e%3cpath fill-rule='evenodd' d='M8 2a.75.75 0 0 1 .75.75v4.5h4.5a.75.75 0 0 1 0 1.5h-4.5v4.5a.75.75 0 0 1-1.5 0v-4.5h-4.5a.75.75 0 0 1 0-1.5h4.5v-4.5A.75.75 0 0 1 8 2Z'/%3e%3c/svg%3e");
  transition:transform 0.2s ease;
}
.accordion-header .accordion-button:not(.collapsed)::after{
  background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%231A6B8A'%3e%3cpath fill-rule='evenodd' d='M2.5 8a.75.75 0 0 1 .75-.75h9.5a.75.75 0 0 1 0 1.5h-9.5A.75.75 0 0 1 2.5 8Z'/%3e%3c/svg%3e");
}
.accordion-body{
  padding:16px 24px 24px;
  font-size:15px;
  color:var(--text-sub);
  line-height:1.8;
  border-top:1px solid var(--border);
}

/* CTA */
.cta-card{
  background:var(--primary);
  border-radius:16px;
  padding:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  position:relative;
  overflow:hidden;
  box-shadow:var(--shadow-hover);
}
.cta-card::before{
  content:"";
  position:absolute;
  right:-40px;
  top:-40px;
  width:180px;
  height:180px;
  border-radius:50%;
  background:rgba(255,255,255,0.06);
}
.cta-content h2{
  font-size:28px;
  color:#fff;
  margin-bottom:10px;
}
.cta-content p{
  font-size:15px;
  color:rgba(255,255,255,0.85);
  margin:0;
}
.cta-action{
  flex-shrink:0;
}

/* 页脚 */
.site-footer{
  background:var(--bg-white);
  border-top:1px solid var(--border);
  padding:64px 0 32px;
}
.site-footer .footer-brand{
  font-size:21px;
  font-weight:700;
  color:var(--primary);
  margin-bottom:12px;
}
.site-footer .footer-desc{
  font-size:14px;
  color:var(--text-sub);
  margin-bottom:24px;
  max-width:260px;
}
.site-footer h4{
  font-size:16px;
  font-weight:600;
  margin-bottom:18px;
  color:var(--text-main);
}
.site-footer ul{
  list-style:none;
  padding:0;
  margin:0;
}
.site-footer ul li{
  margin-bottom:12px;
}
.site-footer ul li a{
  font-size:14px;
  color:var(--text-sub);
  transition:color 0.2s ease;
}
.site-footer ul li a:hover{
  color:var(--accent);
}
.site-footer .contact-item{
  display:flex;
  align-items:center;
  gap:12px;
  font-size:14px;
  color:var(--text-sub);
  margin-bottom:12px;
}
.site-footer .contact-item i{
  color:var(--primary);
  width:16px;
}
.site-footer .footer-social{
  display:flex;
  gap:12px;
}
.site-footer .footer-social a{
  width:40px;
  height:40px;
  border-radius:8px;
  background:var(--bg-main);
  border:1px solid var(--border);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--text-sub);
  font-size:16px;
  transition:all 0.2s ease;
}
.site-footer .footer-social a:hover{
  background:var(--primary);
  color:#fff;
  border-color:var(--primary);
}
.site-footer .footer-bottom{
  border-top:1px solid var(--border);
  margin-top:48px;
  padding-top:24px;
  text-align:center;
}
.site-footer .footer-bottom p{
  font-size:14px;
  color:var(--text-weak);
  margin:0;
}

@media (max-width: 991.98px){
  .site-header .navbar-collapse{
    background:var(--bg-white);
    border-top:1px solid var(--border);
    padding:12px 0 16px;
    margin-top:8px;
  }
  .site-header .navbar-nav{
    gap:0;
  }
  .site-header .nav-link{
    padding:14px 8px;
    border-bottom:1px solid var(--border);
  }
  .site-header .nav-link::after{
    display:none;
  }
  .site-header .nav-link.active{
    color:var(--primary);
    font-weight:600;
  }
  .service-cards{
    grid-template-columns:1fr 1fr;
  }
  .scene-wrap{
    grid-template-columns:1fr;
    gap:40px;
  }
  .process-steps{
    grid-template-columns:1fr 1fr;
  }
  .stats-grid{
    grid-template-columns:1fr 1fr;
  }
  .cta-card{
    flex-direction:column;
    text-align:center;
    padding:40px 28px;
  }
  .cta-action .btn{
    min-width:180px;
  }
  .hero-title{
    font-size:34px;
  }
}
@media (max-width: 767.98px){
  .section{
    padding:64px 0;
  }
  .page-hero{
    padding:56px 0 48px;
  }
  .hero-title{
    font-size:30px;
  }
  .hero-visual{
    margin-top:36px;
  }
  .service-cards{
    grid-template-columns:1fr;
    gap:20px;
  }
  .process-steps{
    grid-template-columns:1fr;
    gap:28px;
  }
  .stats-grid{
    grid-template-columns:1fr 1fr;
    gap:16px;
  }
  .stat-item{
    padding:24px 12px;
  }
  .stat-num{
    font-size:30px;
  }
  .scene-content h2{
    font-size:26px;
  }
  .section-head .section-title{
    font-size:27px;
  }
  .cta-card{
    padding:32px 20px;
  }
  .cta-content h2{
    font-size:24px;
  }
  .hero-actions{
    flex-direction:column;
    align-items:flex-start;
  }
  .hero-actions .btn{
    width:100%;
  }
  .footer-col{
    margin-bottom:28px;
  }
}

/* roulang page: article */
:root{
    --primary:#1F7296;
    --primary-dark:#175D7A;
    --primary-deep:#145066;
    --primary-light:#EAF2F6;
    --accent:#E8734A;
    --accent-dark:#D9603A;
    --bg-body:#F5F8FA;
    --bg-white:#FFFFFF;
    --text-main:#2B3A42;
    --text-mid:#5A6B75;
    --text-weak:#9AA7AD;
    --border-color:#E3E9ED;
    --radius-lg:12px;
    --radius-md:8px;
    --radius-sm:6px;
    --shadow-sm:0 4px 12px rgba(26,43,58,0.06);
    --shadow-hover:0 8px 24px rgba(26,43,58,0.10);
    --font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
    font-family:var(--font-family);
    background:var(--bg-body);
    color:var(--text-main);
    line-height:1.6;
    font-size:16px;
    -webkit-font-smoothing:antialiased;
    padding-bottom:64px;
}
a{color:var(--primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block}
ul,ol{padding-left:1.4em}
.container{max-width:1200px}
.btn{border-radius:var(--radius-sm);font-weight:500;font-size:16px;padding:12px 24px;transition:all .2s ease;border:none}
.btn-primary{
    background:var(--primary);
    color:#fff;
}
.btn-primary:hover{
    background:var(--primary-dark);
    color:#fff;
    transform:translateY(-1px);
    box-shadow:var(--shadow-hover);
}
.btn-primary:focus{
    box-shadow:0 0 0 3px rgba(31,114,150,0.25);
    outline:none;
}
.btn-accent{
    background:var(--accent);
    color:#fff;
}
.btn-accent:hover{
    background:var(--accent-dark);
    color:#fff;
    transform:translateY(-1px);
    box-shadow:0 6px 18px rgba(232,115,74,0.30);
}
.btn-accent:focus{
    box-shadow:0 0 0 3px rgba(232,115,74,0.25);
    outline:none;
}
.btn-outline-custom{
    background:transparent;
    border:1px solid var(--border-color);
    color:var(--text-mid);
}
.btn-outline-custom:hover{
    border-color:var(--primary);
    color:var(--primary);
    background:var(--primary-light);
}
.section-padding{padding:80px 0}

/* ===== Header Navigation ===== */
.site-header{
    background:#fff;
    border-bottom:1px solid var(--border-color);
    position:relative;
    z-index:100;
}
.site-header .navbar{
    min-height:72px;
    padding:0;
}
.site-header .navbar-brand{
    font-size:22px;
    font-weight:700;
    color:var(--text-main);
    letter-spacing:0.5px;
    padding:0;
}
.site-header .navbar-brand:hover{color:var(--primary)}
.site-header .navbar-nav .nav-link{
    font-size:15px;
    font-weight:500;
    color:var(--text-mid);
    padding:10px 16px;
    position:relative;
    letter-spacing:0.5px;
    transition:color .2s ease;
}
.site-header .navbar-nav .nav-link::after{
    content:"";
    position:absolute;
    left:16px;right:16px;bottom:2px;
    height:3px;
    border-radius:999px;
    background:var(--primary);
    opacity:0;
    transform:scaleX(0.6);
    transition:opacity .2s ease,transform .2s ease;
}
.site-header .navbar-nav .nav-link:hover{
    color:var(--primary-dark);
}
.site-header .navbar-nav .nav-link:hover::after{
    opacity:0.35;
    transform:scaleX(1);
}
.site-header .navbar-nav .nav-link.active{
    color:var(--primary);
}
.site-header .navbar-nav .nav-link.active::after{
    opacity:1;
    transform:scaleX(1);
}
.site-header .navbar-toggler{
    border:none;
    padding:6px 8px;
}
.site-header .navbar-toggler:focus{
    box-shadow:none;
    border-radius:var(--radius-sm);
    outline:2px solid var(--primary-light);
}

/* ===== Breadcrumb ===== */
.breadcrumb-wrap{
    background:#fff;
    border-bottom:1px solid var(--border-color);
    padding:16px 0;
}
.breadcrumb-nav{
    font-size:14px;
    color:var(--text-weak);
}
.breadcrumb-nav ol{
    list-style:none;
    display:flex;
    flex-wrap:wrap;
    gap:6px;
    padding:0;
    margin:0;
}
.breadcrumb-nav li+li::before{
    content:"/";
    margin:0 6px;
    color:var(--text-weak);
    opacity:0.6;
}
.breadcrumb-nav a{
    color:var(--text-mid);
    text-decoration:none;
}
.breadcrumb-nav a:hover{color:var(--primary)}
.breadcrumb-nav .active{
    color:var(--text-weak);
    overflow:hidden;
    text-overflow:ellipsis;
    white-space:nowrap;
    max-width:240px;
}

/* ===== Article Hero ===== */
.article-top{
    background:#fff;
    padding:48px 0 40px;
    border-bottom:1px solid var(--border-color);
}
.article-title{
    font-size:38px;
    line-height:1.3;
    font-weight:700;
    color:var(--text-main);
    margin:20px 0 16px;
    letter-spacing:0.5px;
}
.article-meta{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:16px;
    font-size:14px;
    color:var(--text-weak);
}
.article-meta .badge-custom{
    background:var(--primary-light);
    color:var(--primary);
    border-radius:999px;
    padding:4px 14px;
    font-size:13px;
    font-weight:500;
}
.article-meta .meta-dot{
    width:4px;height:4px;
    border-radius:50%;
    background:var(--border-color);
}
.article-meta .author-w{
    display:flex;
    align-items:center;
    gap:6px;
    color:var(--text-mid);
}

/* ===== Article Main Layout ===== */
.article-wrap{
    padding:48px 0 40px;
}
.article-main{
    background:#fff;
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow-sm);
    padding:40px 44px;
    border:1px solid var(--border-color);
}
@media (min-width:992px){
    .article-main{
        max-width:740px;
    }
}
.article-feature-img{
    border-radius:var(--radius-md);
    overflow:hidden;
    margin-bottom:28px;
}
.article-feature-img img{
    width:100%;
    height:auto;
    object-fit:cover;
    border-radius:var(--radius-md);
}

/* ===== Article Content ===== */
.article-content{
    color:var(--text-main);
    font-size:16px;
    line-height:1.85;
}
.article-content p{
    margin-bottom:24px;
    color:var(--text-main);
}
.article-content h2{
    font-size:26px;
    font-weight:600;
    color:var(--text-main);
    margin:36px 0 18px;
    padding-bottom:10px;
    border-bottom:2px solid var(--primary-light);
}
.article-content h3{
    font-size:20px;
    font-weight:600;
    color:var(--text-main);
    margin:30px 0 14px;
}
.article-content h4{
    font-size:17px;
    font-weight:600;
    color:var(--text-main);
    margin:24px 0 12px;
}
.article-content ul,.article-content ol{
    margin-bottom:24px;
    padding-left:1.4em;
    color:var(--text-main);
}
.article-content ul li,.article-content ol li{
    margin-bottom:8px;
}
.article-content a{
    color:var(--primary);
    text-decoration:underline;
    text-underline-offset:3px;
}
.article-content a:hover{
    color:var(--primary-dark);
}
.article-content blockquote{
    border-left:4px solid var(--accent);
    background:var(--primary-light);
    padding:16px 20px;
    border-radius:0 var(--radius-sm) var(--radius-sm) 0;
    margin:28px 0;
    color:var(--text-mid);
    font-style:normal;
}
.article-content blockquote p{
    margin-bottom:0;
}
.article-content img{
    border-radius:var(--radius-md);
    margin:28px auto;
    box-shadow:var(--shadow-sm);
}
.article-content figcaption{
    text-align:center;
    font-size:13px;
    color:var(--text-weak);
    margin-top:-16px;
    margin-bottom:24px;
}
.article-content pre{
    background:#F1F5F8;
    border:1px solid var(--border-color);
    border-radius:var(--radius-md);
    padding:18px 20px;
    font-size:14px;
    line-height:1.7;
    overflow-x:auto;
    margin:28px 0;
    font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
.article-content code{
    background:#F1F5F8;
    border:1px solid var(--border-color);
    border-radius:4px;
    padding:2px 6px;
    font-size:14px;
}
.article-content pre code{
    border:none;
    padding:0;
    background:none;
    font-size:14px;
}
.article-content table{
    width:100%;
    border-collapse:collapse;
    margin:28px 0;
}
.article-content table th,.article-content table td{
    border:1px solid var(--border-color);
    padding:10px 14px;
    text-align:left;
    font-size:14px;
}
.article-content table th{
    background:var(--primary-light);
    font-weight:600;
}
.article-content hr{
    border:none;
    border-top:1px solid var(--border-color);
    margin:36px 0;
}

/* ===== Article Tags ===== */
.article-tags{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    margin-top:32px;
    padding-top:24px;
    border-top:1px solid var(--border-color);
}
.article-tags .tag-item{
    background:var(--bg-body);
    color:var(--text-mid);
    border-radius:999px;
    padding:5px 14px;
    font-size:13px;
    border:1px solid var(--border-color);
    transition:all .2s;
}
.article-tags .tag-item:hover{
    background:var(--primary-light);
    color:var(--primary);
    border-color:var(--primary);
}

/* ===== Article Navigation ===== */
.article-nav-links{
    display:flex;
    justify-content:space-between;
    margin-top:36px;
    padding-top:24px;
    border-top:1px solid var(--border-color);
    gap:20px;
}
.article-nav-links a{
    font-size:14px;
    color:var(--text-mid);
    display:flex;
    align-items:center;
    gap:6px;
    transition:color .2s;
}
.article-nav-links a:hover{
    color:var(--primary);
}
.article-nav-links a i{
    font-size:12px;
}

/* ===== Not Found ===== */
.not-found-box{
    text-align:center;
    padding:64px 24px;
}
.not-found-icon{
    width:80px;
    height:80px;
    border-radius:50%;
    background:var(--primary-light);
    display:flex;
    align-items:center;
    justify-content:center;
    margin:0 auto 24px;
    font-size:28px;
    color:var(--primary);
}
.not-found-box h2{
    font-size:26px;
    font-weight:600;
    color:var(--text-main);
    margin-bottom:12px;
}
.not-found-box p{
    color:var(--text-mid);
    font-size:15px;
    margin-bottom:28px;
    max-width:360px;
    margin-left:auto;
    margin-right:auto;
}

/* ===== Sidebar / Related ===== */
.article-sidebar .sidebar-widget{
    background:#fff;
    border:1px solid var(--border-color);
    border-radius:var(--radius-lg);
    padding:24px;
    box-shadow:var(--shadow-sm);
    margin-bottom:24px;
}
.sidebar-widget .widget-title{
    font-size:18px;
    font-weight:600;
    color:var(--text-main);
    margin-bottom:18px;
    padding-bottom:12px;
    border-bottom:2px solid var(--primary-light);
    display:flex;
    align-items:center;
    gap:8px;
}
.sidebar-widget .widget-title i{
    color:var(--primary);
    font-size:16px;
}
.related-list{
    list-style:none;
    padding:0;
    margin:0;
}
.related-list li{
    padding:12px 0;
    border-bottom:1px solid var(--border-color);
}
.related-list li:last-child{
    border-bottom:none;
}
.related-card{
    display:flex;
    gap:14px;
    align-items:flex-start;
    text-decoration:none;
    transition:all .2s;
}
.related-card:hover .related-card-title{
    color:var(--primary);
}
.related-card-img{
    width:72px;
    height:60px;
    border-radius:var(--radius-sm);
    object-fit:cover;
    flex-shrink:0;
    overflow:hidden;
}
.related-card-img img{
    width:100%;
    height:100%;
    object-fit:cover;
}
.related-card-body{
    flex:1;
    min-width:0;
}
.related-card-title{
    font-size:14px;
    font-weight:500;
    color:var(--text-main);
    line-height:1.5;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
    margin-bottom:6px;
    transition:color .2s;
}
.related-card-date{
    font-size:12px;
    color:var(--text-weak);
}
.sidebar-widget .hot-item{
    display:flex;
    align-items:center;
    gap:10px;
    padding:10px 0;
    border-bottom:1px solid var(--border-color);
}
.sidebar-widget .hot-item:last-child{
    border-bottom:none;
}
.hot-num{
    width:24px;
    height:24px;
    border-radius:6px;
    background:var(--primary-light);
    color:var(--primary);
    font-size:13px;
    font-weight:600;
    display:flex;
    align-items:center;
    justify-content:center;
    flex-shrink:0;
}
.hot-item:nth-child(-n+3) .hot-num{
    background:var(--accent);
    color:#fff;
}
.hot-item a{
    font-size:14px;
    color:var(--text-mid);
    line-height:1.4;
    flex:1;
    min-width:0;
}
.hot-item a:hover{
    color:var(--primary);
}
.cta-widget{
    background:var(--primary);
    border-radius:var(--radius-lg);
    padding:28px 24px;
    text-align:center;
    color:#fff;
    border:none;
}
.cta-widget h4{
    font-size:20px;
    font-weight:600;
    margin-bottom:10px;
}
.cta-widget p{
    font-size:14px;
    opacity:0.85;
    margin-bottom:20px;
    line-height:1.6;
}

/* ===== CTA Section ===== */
.article-cta-section{
    padding-bottom:64px;
}
.cta-card{
    background:linear-gradient(135deg,#1F7296 0%,#175D7A 100%);
    border-radius:var(--radius-lg);
    padding:48px 56px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:32px;
    flex-wrap:wrap;
    color:#fff;
    box-shadow:0 8px 28px rgba(31,114,150,0.2);
}
.cta-card-left h2{
    font-size:26px;
    font-weight:600;
    margin-bottom:8px;
}
.cta-card-left p{
    font-size:15px;
    opacity:0.85;
    margin-bottom:0;
}
.cta-card-right{
    display:flex;
    gap:12px;
    flex-shrink:0;
}
.cta-card-right .btn-accent{
    background:var(--accent);
    color:#fff;
}

/* ===== Footer ===== */
.site-footer{
    background:#fff;
    border-top:1px solid var(--border-color);
    padding:48px 0 0;
    margin-top:0;
}
.site-footer .footer-brand{
    font-size:20px;
    font-weight:700;
    color:var(--text-main);
    margin-bottom:12px;
}
.site-footer .footer-desc{
    color:var(--text-mid);
    font-size:14px;
    line-height:1.7;
    margin-bottom:0;
    max-width:260px;
}
.site-footer .footer-col h4{
    font-size:15px;
    font-weight:600;
    color:var(--text-main);
    margin-bottom:16px;
}
.site-footer .footer-col ul{
    list-style:none;
    padding:0;
    margin:0;
}
.site-footer .footer-col ul li{
    margin-bottom:10px;
}
.site-footer .footer-col ul li a{
    color:var(--text-mid);
    font-size:14px;
    text-decoration:none;
    transition:color .2s;
}
.site-footer .footer-col ul li a:hover{
    color:var(--primary);
}
.site-footer .contact-item{
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:10px;
    color:var(--text-mid);
    font-size:14px;
}
.site-footer .contact-item i{
    color:var(--primary);
    width:16px;
}
.site-footer .footer-social{
    display:flex;
    gap:12px;
    margin-top:4px;
}
.site-footer .footer-social a{
    width:36px;
    height:36px;
    border:1px solid var(--border-color);
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    color:var(--text-mid);
    font-size:14px;
    text-decoration:none;
    transition:all .2s;
}
.site-footer .footer-social a:hover{
    background:var(--primary);
    color:#fff;
    border-color:var(--primary);
    transform:translateY(-2px);
}
.footer-bottom{
    border-top:1px solid var(--border-color);
    margin-top:40px;
    padding:20px 0;
    text-align:center;
}
.footer-bottom p{
    color:var(--text-weak);
    font-size:13px;
    margin:0;
}

/* ===== Responsive ===== */
@media (max-width:1199.98px){
    .article-main{
        padding:36px 32px;
    }
}
@media (max-width:991.98px){
    .site-header .navbar-collapse{
        background:#fff;
        padding:12px 0 20px;
        border-top:1px solid var(--border-color);
        margin-top:10px;
    }
    .site-header .navbar-nav .nav-link{
        padding:14px 8px;
        border-bottom:1px solid var(--border-color);
    }
    .site-header .navbar-nav .nav-link:last-child{
        border-bottom:none;
    }
    .site-header .navbar-nav .nav-link::after{
        display:none;
    }
    .site-header .navbar-nav .nav-link.active{
        background:var(--primary-light);
        border-radius:var(--radius-sm);
        color:var(--primary);
        padding-left:16px;
    }
    .section-padding{
        padding:60px 0;
    }
    .article-top{
        padding:32px 0 28px;
    }
    .article-title{
        font-size:32px;
    }
    .article-main{
        padding:28px 24px;
        max-width:100%;
    }
    .article-sidebar{
        margin-top:32px;
    }
    .cta-card{
        padding:36px 28px;
    }
}
@media (max-width:767.98px){
    body{
        font-size:15px;
        padding-bottom:64px;
    }
    .article-title{
        font-size:28px;
    }
    .article-meta{
        gap:10px;
        font-size:13px;
    }
    .article-meta .meta-dot{
        display:none;
    }
    .article-wrap{
        padding:24px 0 32px;
    }
    .article-main{
        padding:20px 16px;
        border-radius:var(--radius-md);
    }
    .article-content{
        font-size:15px;
        line-height:1.75;
    }
    .article-content p{
        margin-bottom:20px;
    }
    .article-content h2{
        font-size:22px;
    }
    .article-content h3{
        font-size:18px;
    }
    .breadcrumb-nav li{
        font-size:13px;
    }
    .breadcrumb-nav .active{
        max-width:170px;
    }
    .cta-card{
        padding:28px 20px;
        flex-direction:column;
        text-align:center;
        gap:20px;
    }
    .cta-card-left h2{
        font-size:22px;
    }
    .cta-card-right{
        flex-direction:column;
        width:100%;
    }
    .cta-card-right .btn{
        width:100%;
    }
    .article-nav-links{
        flex-direction:column;
        gap:12px;
    }
    .footer-bottom{
        padding:18px 0;
    }
}
@media (max-width:575.98px){
    .article-top{
        padding:24px 0 20px;
    }
    .article-title{
        font-size:25px;
        line-height:1.35;
        margin-top:16px;
    }
    .article-meta{
        flex-wrap:wrap;
        gap:8px 14px;
    }
    .article-meta .meta-item{
        font-size:13px;
    }
    .article-main{
        padding:18px 14px;
    }
    .article-content blockquote{
        padding:12px 16px;
        font-size:14px;
    }
    .article-tags{
        gap:6px;
    }
    .article-tags .tag-item{
        font-size:12px;
        padding:4px 10px;
    }
}

/* roulang page: category2 */
:root{
  --brand:#1A6B8A;
  --brand-dark:#155A73;
  --brand-bg:#EAF2F5;
  --accent:#E8734A;
  --accent-bg:#FDF0EB;
  --bg:#F5F8FA;
  --white:#FFFFFF;
  --text:#2B3A42;
  --text-secondary:#6B7B84;
  --text-weak:#9AA7AD;
  --border:#E3E9ED;
  --radius-btn:6px;
  --radius-card:8px;
  --radius-pill:999px;
  --shadow:0 4px 12px rgba(26,43,58,.06);
  --shadow-hover:0 8px 24px rgba(26,43,58,.10);
  --transition:.2s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{text-decoration:none;color:inherit;transition:color var(--transition);}
ul{list-style:none;}
.container{max-width:1200px;padding-left:24px;padding-right:24px;}
section{padding:84px 0;}
.site-header{background:var(--white);border-bottom:1px solid var(--border);position:relative;z-index:100;}
.navbar{min-height:72px;padding:0;background:var(--white);}
.navbar-brand{font-size:22px;font-weight:700;color:var(--brand);letter-spacing:.5px;}
.navbar-brand:hover{color:var(--brand-dark);}
.navbar-nav .nav-link{
  color:var(--text-secondary);
  font-size:15px;
  font-weight:500;
  letter-spacing:.5px;
  padding:24px 18px;
  position:relative;
  transition:color var(--transition);
}
.navbar-nav .nav-link.active{color:var(--brand);}
.navbar-nav .nav-link.active::after{
  content:'';
  position:absolute;
  left:50%;
  transform:translateX(-50%);
  bottom:0;
  width:28px;
  height:4px;
  background:var(--brand);
  border-radius:2px 2px 0 0;
}
.navbar-nav .nav-link::before{
  content:'';
  position:absolute;
  left:50%;
  transform:translateX(-50%);
  bottom:0;
  width:0;
  height:2px;
  background:rgba(26,107,138,.3);
  transition:width var(--transition);
}
.navbar-nav .nav-link:hover::before{width:28px;}
.navbar-nav .nav-link:hover{color:var(--brand);}
.navbar-toggler{border:none;padding:8px 12px;}
.navbar-toggler:focus{box-shadow:none;}
.navbar-toggler-icon{
  background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(26,107,138,1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}
header.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 18px;
  border:1px solid var(--brand);
  border-radius:var(--radius-pill);
  color:var(--brand);
  font-size:14px;
  font-weight:500;
  margin-left:12px;
  transition:all var(--transition);
}
header.nav-cta:hover{
  background:var(--brand);
  color:#fff;
}
@media(max-width:991px){
  .navbar-collapse{
    background:var(--white);
    border-top:1px solid var(--border);
    padding:12px 0 20px;
  }
  .navbar-nav .nav-link{
    padding:14px 8px;
    border-bottom:1px solid var(--border);
    display:block;
  }
  .navbar-nav .nav-link.active::after{
    left:8px;
    transform:none;
    width:4px;
    height:20px;
    border-radius:2px;
    bottom:auto;
    top:50%;
    margin-top:-10px;
  }
  .navbar-nav .nav-link::before{display:none;}
  header.nav-cta{margin-left:0;margin-top:12px;}
}
.site-footer{
  background:var(--white);
  border-top:1px solid var(--border);
  padding:48px 0 0;
}
.footer-brand{font-size:20px;font-weight:700;color:var(--brand);margin-bottom:8px;}
.footer-desc{font-size:14px;color:var(--text-secondary);line-height:1.7;margin-bottom:0;}
.footer-col h4{
  font-size:16px;
  font-weight:600;
  color:var(--text);
  margin-bottom:16px;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul li a{
  font-size:14px;
  color:var(--text-secondary);
  transition:color var(--transition);
}
.footer-col ul li a:hover{color:var(--accent);}
.contact-item{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  color:var(--text-secondary);
  margin-bottom:10px;
}
.contact-item i{color:var(--brand);width:16px;text-align:center;}
.footer-social{
  display:flex;
  gap:10px;
  margin-top:8px;
}
.footer-social a{
  width:36px;
  height:36px;
  display:flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--border);
  border-radius:50%;
  color:var(--text-secondary);
  font-size:14px;
  transition:all var(--transition);
}
.footer-social a:hover{
  background:var(--brand);
  color:#fff;
  border-color:var(--brand);
}
.footer-bottom{
  border-top:1px solid var(--border);
  padding:18px 0;
  margin-top:36px;
  text-align:center;
}
.footer-bottom p{
  font-size:13px;
  color:var(--text-weak);
  margin:0;
}
.btn{
  border-radius:var(--radius-btn);
  font-size:16px;
  font-weight:500;
  padding:12px 26px;
  border:none;
  transition:all var(--transition);
}
.btn-primary{
  background:var(--brand);
  color:#fff;
}
.btn-primary:hover{
  background:var(--brand-dark);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:var(--shadow-hover);
}
.btn-primary:focus{
  outline:none;
  box-shadow:0 0 0 3px rgba(26,107,138,.25);
}
.btn-outline-brand{
  background:transparent;
  border:1px solid var(--brand);
  color:var(--brand);
}
.btn-outline-brand:hover{
  background:var(--brand);
  color:#fff;
}
.btn-accent{
  background:var(--accent);
  color:#fff;
}
.btn-accent:hover{
  background:#d85f39;
  color:#fff;
  transform:translateY(-1px);
  box-shadow:0 8px 20px rgba(232,115,74,.3);
}
.btn-text{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--brand);
  font-weight:500;
  padding:10px 0;
}
.btn-text i{transition:transform var(--transition);}
.btn-text:hover{color:var(--brand-dark);}
.btn-text:hover i{transform:translateX(4px);}
.badge-pill{
  display:inline-block;
  padding:5px 14px;
  border-radius:var(--radius-pill);
  font-size:13px;
  font-weight:500;
  letter-spacing:.5px;
}
/* ===== Category Hero ===== */
.category-hero{
  background:linear-gradient(180deg,var(--brand-bg) 0%,var(--bg) 100%);
  padding:88px 0 76px;
  position:relative;
  overflow:hidden;
}
.category-hero::before{
  content:'';
  position:absolute;
  width:380px;
  height:380px;
  border-radius:50%;
  background:rgba(26,107,138,.05);
  right:-100px;
  top:-60px;
}
.category-hero::after{
  content:'';
  position:absolute;
  width:220px;
  height:220px;
  border-radius:50%;
  background:rgba(232,115,74,.06);
  left:50%;
  bottom:-90px;
}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(26,107,138,.1);
  color:var(--brand);
  padding:7px 18px;
  border-radius:var(--radius-pill);
  font-size:13px;
  font-weight:500;
  margin-bottom:20px;
}
.hero-badge::before{
  content:'';
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--accent);
}
.category-hero h1{
  font-size:42px;
  font-weight:700;
  line-height:1.3;
  color:var(--text);
  letter-spacing:1px;
  margin-bottom:12px;
}
.hero-subtitle{
  font-size:17px;
  color:var(--text-secondary);
  max-width:520px;
  line-height:1.8;
  margin-bottom:28px;
}
.hero-actions{
  display:flex;
  align-items:center;
  gap:20px;
  margin-bottom:24px;
  flex-wrap:wrap;
}
.hero-tags{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}
.hero-tags span{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  color:var(--text-secondary);
  background:var(--white);
  border:1px solid var(--border);
  padding:6px 16px;
  border-radius:var(--radius-pill);
}
.hero-tags span i{color:var(--accent);font-size:12px;}
.hero-image-wrap{
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-hover);
  position:relative;
}
.hero-image-wrap img{
  width:100%;
  height:360px;
  object-fit:cover;
}
.hero-image-overlay{
  position:absolute;
  left:16px;
  bottom:16px;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(4px);
  border-radius:var(--radius-btn);
  padding:8px 16px;
  font-size:13px;
  font-weight:500;
  color:var(--brand);
  display:inline-flex;
  align-items:center;
  gap:8px;
}
@media(max-width:991px){
  .category-hero{padding:56px 0 48px;}
  .category-hero h1{font-size:34px;}
  .hero-subtitle{font-size:15px;max-width:100%;}
  .hero-image-wrap{margin-top:32px;}
  .hero-image-wrap img{height:260px;}
}
/* ===== Section title ===== */
.section-head{
  text-align:center;
  margin-bottom:48px;
}
.section-head .section-tag{
  display:inline-block;
  font-size:13px;
  font-weight:500;
  color:var(--accent);
  letter-spacing:2px;
  margin-bottom:8px;
  text-transform:uppercase;
}
.section-head h2{
  font-size:32px;
  font-weight:600;
  color:var(--text);
  line-height:1.4;
  margin:0 0 12px;
}
.section-head p{
  font-size:16px;
  color:var(--text-secondary);
  max-width:560px;
  margin:0 auto;
  line-height:1.7;
}
@media(max-width:767px){
  .section-head h2{font-size:27px;}
}
/* ===== Knowledge fields ===== */
.knowledge-fields{
  background:var(--white);
  padding:84px 0;
}
.field-card{
  background:var(--white);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:36px 28px;
  height:100%;
  box-shadow:var(--shadow);
  transition:all var(--transition);
  position:relative;
  overflow:hidden;
}
.field-card::before{
  content:'';
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:3px;
  background:var(--brand);
  opacity:0;
  transition:opacity var(--transition);
}
.field-card:hover{
  box-shadow:var(--shadow-hover);
  border-color:rgba(26,107,138,.2);
  transform:translateY(-3px);
}
.field-card:hover::before{opacity:1;}
.field-card.featured{
  background:var(--brand-bg);
  border-color:rgba(26,107,138,.2);
}
.field-card.featured::before{opacity:1;}
.field-icon{
  width:56px;
  height:56px;
  border-radius:14px;
  background:rgba(26,107,138,.08);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:24px;
  color:var(--brand);
  margin-bottom:20px;
  transition:all var(--transition);
}
.field-card:hover .field-icon{
  background:rgba(26,107,138,.14);
  transform:scale(1.05);
}
.field-card h3{
  font-size:20px;
  font-weight:600;
  margin-bottom:12px;
  color:var(--text);
}
.field-card p{
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.7;
  margin-bottom:18px;
}
.field-card .card-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:500;
  color:var(--brand);
}
.field-card .card-link i{transition:transform var(--transition);}
.field-card .card-link:hover i{transform:translateX(4px);}
/* ===== Knowledge system ===== */
.knowledge-system{
  background:var(--bg);
  padding:84px 0;
}
.system-image-wrap{
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-hover);
  position:relative;
}
.system-image-wrap img{
  width:100%;
  height:420px;
  object-fit:cover;
}
.system-image-badge{
  position:absolute;
  right:16px;
  top:16px;
  background:rgba(255,255,255,.92);
  border-radius:var(--radius-pill);
  padding:6px 14px;
  font-size:13px;
  font-weight:500;
  color:var(--text);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.system-image-badge i{color:var(--accent);}
.system-content{padding-left:16px;}
.system-content h2{
  font-size:32px;
  font-weight:600;
  color:var(--text);
  line-height:1.4;
  margin-bottom:16px;
}
.system-content > p{
  font-size:15px;
  color:var(--text-secondary);
  line-height:1.8;
  margin-bottom:24px;
}
.system-list{
  margin:0 0 28px;
}
.system-list li{
  display:flex;
  align-items:flex-start;
  gap:12px;
  padding:10px 0;
  font-size:15px;
  color:var(--text);
  border-bottom:1px dashed var(--border);
}
.system-list li:last-child{border-bottom:none;}
.system-list li i{
  color:var(--accent);
  font-size:16px;
  margin-top:3px;
  flex-shrink:0;
}
.system-list li span{
  font-weight:500;
  color:var(--text);
  margin-right:4px;
}
.system-list li .list-desc{
  color:var(--text-secondary);
  font-size:14px;
}
@media(max-width:991px){
  .system-content{padding-left:0;padding-top:32px;}
  .system-image-wrap img{height:300px;}
}
/* ===== Learn process ===== */
.learn-process{
  background:var(--white);
  padding:84px 0;
}
.process-step{
  text-align:center;
  padding:32px 20px;
  position:relative;
}
.process-step::after{
  content:'';
  position:absolute;
  top:46px;
  left:calc(50% + 60px);
  width:calc(100% - 120px);
  height:1px;
  background:var(--border);
  z-index:1;
}
.process-step:last-child::after{display:none;}
.step-number{
  width:56px;
  height:56px;
  border-radius:50%;
  background:var(--brand-bg);
  color:var(--brand);
  font-size:20px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
  margin:0 auto 16px;
  position:relative;
  z-index:2;
  border:2px solid var(--brand);
  box-shadow:0 0 0 5px var(--white);
}
.process-step h3{
  font-size:18px;
  font-weight:600;
  color:var(--text);
  margin-bottom:10px;
}
.process-step p{
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.7;
  max-width:220px;
  margin:0 auto;
}
@media(max-width:991px){
  .process-step::after{display:none;}
}
/* ===== Trust section ===== */
.trust-section{
  background:var(--bg);
  padding:84px 0;
}
.stat-item{
  text-align:center;
  padding:24px 12px;
}
.stat-number{
  font-size:38px;
  font-weight:700;
  color:var(--brand);
  line-height:1.2;
}
.stat-number span{color:var(--accent);font-size:22px;font-weight:500;}
.stat-label{
  font-size:14px;
  color:var(--text-secondary);
  margin-top:6px;
}
.testimonial-card{
  background:var(--white);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:28px 24px;
  box-shadow:var(--shadow);
  height:100%;
  transition:all var(--transition);
  position:relative;
}
.testimonial-card:hover{
  box-shadow:var(--shadow-hover);
  border-color:rgba(26,107,138,.18);
}
.testimonial-card .quote-icon{
  width:36px;
  height:36px;
  border-radius:50%;
  background:var(--accent-bg);
  color:var(--accent);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:16px;
  margin-bottom:16px;
}
.testimonial-card p{
  font-size:15px;
  color:var(--text);
  line-height:1.8;
  margin-bottom:16px;
}
.testimonial-author{
  font-size:14px;
  color:var(--text-weak);
  border-top:1px solid var(--border);
  padding-top:14px;
}
.testimonial-author strong{
  color:var(--text-secondary);
  font-weight:500;
}
/* ===== FAQ ===== */
.faq-section{
  background:var(--white);
  padding:84px 0;
}
.accordion{
  max-width:820px;
  margin:0 auto;
}
.accordion-item{
  border:1px solid var(--border) !important;
  border-radius:var(--radius-card) !important;
  margin-bottom:16px;
  overflow:hidden;
  box-shadow:0 2px 8px rgba(26,43,58,.03);
}
.accordion-button{
  font-size:16px;
  font-weight:600;
  color:var(--text);
  padding:20px 24px;
  background:var(--white) !important;
  border:none;
  transition:all var(--transition);
}
.accordion-button:not(.collapsed){
  color:var(--brand) !important;
  background:var(--brand-bg) !important;
  box-shadow:none !important;
}
.accordion-button:focus{
  box-shadow:0 0 0 3px rgba(26,107,138,.15) !important;
  border-radius:var(--radius-card);
}
.accordion-button::after{
  flex-shrink:0;
  background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231A6B8A' stroke-width='2.5' stroke-linecap='round'%3e%3cpath d='M12 5v14M5 12h14'/%3e%3c/svg%3e") !important;
  transition:transform var(--transition);
}
.accordion-button:not(.collapsed)::after{
  background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231A6B8A' stroke-width='2.5' stroke-linecap='round'%3e%3cpath d='M5 12h14'/%3e%3c/svg%3e") !important;
}
.accordion-body{
  padding:8px 24px 24px;
  font-size:15px;
  color:var(--text-secondary);
  line-height:1.8;
}
@media(max-width:767px){
  .accordion-button{font-size:15px;padding:16px;}
  .accordion-body{font-size:14px;padding:6px 16px 16px;}
}
/* ===== CTA card ===== */
.cta-card-section{
  background:var(--bg);
  padding:64px 0;
}
.cta-card{
  background:var(--white);
  border-radius:16px;
  box-shadow:var(--shadow-hover);
  overflow:hidden;
  border:1px solid var(--border);
  display:flex;
  align-items:center;
  gap:40px;
  padding:48px 56px;
  position:relative;
}
.cta-card::before{
  content:'';
  position:absolute;
  left:0;
  top:0;
  width:6px;
  height:100%;
  background:var(--accent);
}
.cta-content h2{
  font-size:28px;
  font-weight:600;
  color:var(--text);
  margin-bottom:10px;
  line-height:1.4;
}
.cta-content p{
  font-size:15px;
  color:var(--text-secondary);
  margin-bottom:0;
  line-height:1.7;
  max-width:520px;
}
.cta-actions{
  flex-shrink:0;
  margin-left:auto;
  display:flex;
  gap:14px;
  align-items:center;
  flex-wrap:wrap;
}
@media(max-width:991px){
  .cta-card{
    flex-direction:column;
    text-align:center;
    padding:40px 28px;
    gap:20px;
  }
  .cta-actions{margin-left:0;justify-content:center;}
  .cta-content p{margin:0 auto;}
  .cta-card::before{
    width:100%;
    height:6px;
  }
}
/* ===== Utility ===== */
.text-brand{color:var(--brand);}
.bg-white{background:var(--white);}
.mt-4{margin-top:24px;}
@media(max-width:767px){
  section{padding:56px 0;}
  .field-card{padding:28px 20px;}
  .stat-number{font-size:30px;}
  .hero-tags{gap:8px;}
}