/* roulang page: index */
:root {
  --primary: #0E4F4C;
  --primary-dark: #083A38;
  --primary-light: #E9F1EF;
  --accent: #C9A36A;
  --bg-body: #FAFAF8;
  --surface: #FFFFFF;
  --text-main: #1F2937;
  --text-muted: #6B7280;
  --border: #E5E7EB;
  --radius-card: 8px;
  --radius-btn: 4px;
  --shadow-card: 0 8px 24px rgba(14,79,76,0.06);
  --shadow-card-hover: 0 12px 32px rgba(14,79,76,0.10);
  --transition-mid: 200ms ease-out;
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Inter", "SF Pro Display", "Helvetica Neue", Arial, 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: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; transition: color var(--transition-mid); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; }
h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; margin-bottom: 0; }
ul { list-style: none; margin: 0; padding: 0; }
a:focus-visible, button:focus-visible {
  outline: 3px solid rgba(14,79,76,0.35);
  outline-offset: 2px;
}

/* 全局容器 */
.container { max-width: 1200px; }

/* 区块标题 */
.section-title {
  font-size: 28px;
  font-weight: 600;
  color: var(--text-main);
  text-align: center;
  margin-bottom: 48px;
  position: relative;
}
.section-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin: 12px auto 0;
}

/* 按钮系统 */
.btn {
  font-weight: 500;
  border-radius: var(--radius-btn);
  transition: all var(--transition-mid);
  border: 1px solid transparent;
  font-family: var(--font-family);
  font-size: 15px;
  padding: 10px 24px;
  line-height: 1.4;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: #0a5d59;
  border-color: #0a5d59;
  box-shadow: var(--shadow-card-hover);
  color: #fff;
}
.btn-outline-primary {
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
}
.btn-outline-primary:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary-dark);
}
.btn-lg { padding: 12px 28px; font-size: 15px; }

/* Header 导航 */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 68px;
  background: rgba(255,255,255,0.92);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  z-index: 1000;
  border-bottom: 1px solid transparent;
  transition: background var(--transition-mid), box-shadow var(--transition-mid);
}
.site-header.scrolled {
  background: var(--primary-dark);
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  border-bottom-color: rgba(255,255,255,0.06);
}
.site-header .navbar {
  height: 68px;
  padding: 0;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  transition: color var(--transition-mid);
  margin-right: 0;
  line-height: 1.2;
}
.navbar-brand:hover { color: var(--primary); }
.brand-icon { display: flex; align-items: center; color: var(--accent); }
.site-header.scrolled .navbar-brand { color: #fff; }
.navbar-nav { align-items: center; }
.navbar-nav .nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  margin-left: 36px;
  position: relative;
  padding: 0 2px;
  line-height: 68px;
  transition: color var(--transition-mid);
}
.navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 14px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  transition: width var(--transition-mid);
}
.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
  width: 20px;
}
.navbar-nav .nav-link:hover { color: var(--primary); }
.navbar-nav .nav-link.active { color: var(--primary); }
.site-header.scrolled .navbar-nav .nav-link { color: #fff; }
.site-header.scrolled .navbar-nav .nav-link:hover,
.site-header.scrolled .navbar-nav .nav-link.active { color: #fff; }
.navbar-toggler { border: none; padding: 4px 8px; }
.navbar-toggler:focus { box-shadow: none; }
.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(14,79,76,1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}
.site-header.scrolled .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(255,255,255,1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}
.btn-download-nav {
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  padding: 8px 20px;
  border: 1px solid var(--primary);
  border-radius: var(--radius-btn);
  margin-left: 32px;
  transition: all var(--transition-mid);
}
.btn-download-nav:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}
.site-header.scrolled .btn-download-nav {
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}
.site-header.scrolled .btn-download-nav:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--primary-dark);
}

/* Hero */
.hero-section {
  padding: 140px 0 80px;
  background: linear-gradient(180deg, #EFF5F3 0%, var(--bg-body) 100%);
}
.hero-title {
  font-size: 40px;
  line-height: 1.2;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  animation: fadeUp 0.3s ease-out;
}
.hero-title .brand-highlight { color: var(--primary); }
.hero-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 1.7;
}
.hero-actions { margin-top: 24px; }
.hero-actions .btn { margin-right: 12px; }
.hero-meta {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.hero-stars { color: var(--accent); letter-spacing: 2px; font-size: 14px; }
.hero-rate { font-weight: 600; color: var(--text-main); }
.hero-divider { color: var(--border); }
.hero-downloads { color: var(--text-muted); }
.hero-visual {
  position: relative;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  overflow: hidden;
  background: var(--surface);
  animation: fadeUp 0.3s ease-out 0.1s both;
}
.hero-visual img {
  width: 100%;
  display: block;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 信任指标条 */
.trust-section {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.trust-strip {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.trust-item {
  text-align: center;
  flex: 1;
  border-left: 1px solid var(--border);
  padding: 8px 0;
}
.trust-item:first-child { border-left: none; }
.trust-num {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}
.trust-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* 功能亮点 */
.features-section { padding: 96px 0; }
.feature-card {
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: 32px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  height: 100%;
  transition: transform var(--transition-mid), box-shadow var(--transition-mid);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 20px;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}
.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 0;
}
.feature-wide .feature-body {
  display: flex;
  align-items: center;
  gap: 28px;
}
.feature-wide .feature-content { flex: 1; }
.feature-wide img {
  border-radius: var(--radius-card);
  width: 180px;
  height: 130px;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--border);
}
.feature-full {
  display: flex;
  align-items: center;
  gap: 28px;
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: 28px 32px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-mid), box-shadow var(--transition-mid);
}
.feature-full:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}
.feature-full .feature-icon { margin-bottom: 0; flex-shrink: 0; }
.feature-full h3 { margin-bottom: 4px; }
.feature-full p { margin-bottom: 0; flex: 1; }

/* 轮播区 */
.screenshots-section {
  padding: 96px 0;
  background: var(--primary-light);
}
.screenshot-card {
  background: var(--surface);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  margin: 0 48px;
}
.screenshot-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
}
.screenshot-caption {
  padding: 16px 24px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  text-align: center;
}
.carousel-control-prev.custom-control,
.carousel-control-next.custom-control {
  width: 44px;
  height: 44px;
  top: 50%;
  transform: translateY(-50%);
  bottom: auto;
  opacity: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  box-shadow: var(--shadow-card);
  color: var(--primary);
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-mid);
  z-index: 5;
}
.carousel-control-prev.custom-control i,
.carousel-control-next.custom-control i { font-size: 16px; line-height: 1; }
.carousel-control-prev.custom-control:hover,
.carousel-control-next.custom-control:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.carousel-control-prev.custom-control { left: 12px; }
.carousel-control-next.custom-control { right: 12px; }
.carousel-indicators-wrap {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 32px;
}
.carousel-indicators-wrap button {
  width: 24px;
  height: 3px;
  border-radius: 2px;
  border: none;
  background: #C0C9C7;
  padding: 0;
  cursor: pointer;
  transition: background var(--transition-mid);
}
.carousel-indicators-wrap button.active { background: var(--accent); }

/* 系统要求 */
.requirements-section { padding: 96px 0; }
.req-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px;
  height: 100%;
}
.req-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.req-header i {
  font-size: 20px;
  color: var(--primary);
  width: 32px;
  text-align: center;
}
.req-header h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 0;
}
.req-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.req-item:last-child { border-bottom: none; }
.req-item span {
  font-size: 13px;
  color: var(--text-muted);
  flex-shrink: 0;
  margin-right: 16px;
}
.req-item strong {
  font-size: 15px;
  color: var(--text-main);
  text-align: right;
  font-weight: 500;
}

/* 评价墙 */
.reviews-section {
  padding: 96px 0;
  background: var(--surface);
}
.review-card {
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: 28px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  height: 100%;
  transition: box-shadow var(--transition-mid), transform var(--transition-mid);
}
.review-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.review-stars {
  color: var(--accent);
  font-size: 16px;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.review-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-main);
  margin-bottom: 20px;
}
.review-meta {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
}
.review-name { font-weight: 600; color: var(--text-main); }
.review-time { margin-left: 8px; }

/* 下载按钮组 */
.download-section {
  padding: 96px 0;
  background: var(--bg-body);
  text-align: center;
}
.download-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
}
.download-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 160px;
  height: 64px;
  border-radius: 6px;
  font-family: var(--font-family);
  transition: all var(--transition-mid);
  text-decoration: none;
}
.download-btn.primary {
  background: var(--primary);
  color: #fff;
}
.download-btn.primary:hover {
  background: #0a5d59;
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
  color: #fff;
}
.download-btn.secondary {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-main);
}
.download-btn.secondary:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-2px);
  color: var(--primary-dark);
}
.download-btn i {
  font-size: 20px;
  margin-bottom: 4px;
  line-height: 1;
}
.down-platform {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.2;
}
.down-info {
  font-size: 12px;
  opacity: 0.8;
  line-height: 1.3;
}
.download-version {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 16px;
}

/* 资讯列表 */
.news-section {
  padding: 96px 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.news-list { min-height: 160px; }
.news-item {
  display: flex;
  gap: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 24px;
  margin-bottom: 16px;
  transition: box-shadow var(--transition-mid), transform var(--transition-mid);
}
.news-item:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.news-thumb {
  flex-shrink: 0;
  width: 120px;
  height: 80px;
  border-radius: 4px;
  overflow: hidden;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.news-body { flex: 1; min-width: 0; }
.news-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 4px;
  margin-bottom: 8px;
  font-weight: 500;
  line-height: 1.6;
}
.news-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.news-title a { color: var(--text-main); }
.news-title a:hover { color: var(--primary); }
.news-summary {
  font-size: 14px;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: 0;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-muted);
}
.news-date i { margin-right: 4px; }
.news-more {
  color: var(--primary);
  font-weight: 500;
  font-size: 13px;
  transition: color var(--transition-mid);
}
.news-more:hover { color: var(--primary-dark); }
.news-more i { transition: transform var(--transition-mid); font-size: 11px; }
.news-more:hover i { transform: translateX(3px); }
.empty-tip {
  font-size: 14px;
  color: var(--text-muted);
  text-align: center;
  padding: 56px 0;
  min-height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--border);
  border-radius: var(--radius-card);
}

/* FAQ */
.faq-section {
  padding: 96px 0;
  background: var(--bg-body);
}
.custom-accordion {
  max-width: 800px;
  margin: 0 auto;
}
.custom-accordion .accordion-item {
  border: none;
  border-bottom: 1px solid var(--border);
  border-radius: 0 !important;
  background: transparent;
}
.custom-accordion .accordion-button {
  font-size: 16px;
  font-weight: 500;
  padding: 20px 0;
  background: transparent;
  box-shadow: none;
  color: var(--text-main);
  border-radius: 0 !important;
  border-left: 2px solid transparent;
  transition: color var(--transition-mid), border-color var(--transition-mid);
}
.custom-accordion .accordion-button:not(.collapsed) {
  background: transparent;
  color: var(--primary);
  box-shadow: none;
  border-left-color: var(--accent);
  padding-left: 14px;
}
.custom-accordion .accordion-button:focus {
  box-shadow: none;
}
.custom-accordion .accordion-button::after {
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  content: "\f078";
  background-image: none;
  width: auto;
  height: auto;
  color: var(--text-muted);
  font-size: 13px;
  transition: transform var(--transition-mid), color var(--transition-mid);
}
.custom-accordion .accordion-button:not(.collapsed)::after {
  content: "\f077";
  color: var(--accent);
  transform: none;
}
.custom-accordion .accordion-body {
  padding: 0 0 24px 16px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* CTA */
.cta-section {
  padding: 96px 0;
  background: var(--primary-dark);
  text-align: center;
  color: #fff;
}
.cta-title {
  font-size: 30px;
  font-weight: 600;
  margin-bottom: 16px;
  line-height: 1.3;
}
.cta-subtitle {
  font-size: 16px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 32px;
}
.btn-cta {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--primary-dark);
  font-weight: 600;
  padding: 12px 36px;
  border-radius: var(--radius-btn);
  font-size: 16px;
  font-family: var(--font-family);
  transition: all var(--transition-mid);
}
.btn-cta:hover {
  background: #d4b37f;
  border-color: #d4b37f;
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.2);
  color: var(--primary-dark);
}

/* Footer */
.site-footer {
  position: relative;
  background: var(--primary-dark);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 24px;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: var(--primary-light);
}
.site-footer::after {
  content: '';
  position: absolute;
  top: 1px; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
}
.footer-brand {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 0;
  max-width: 340px;
}
.site-footer h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}
.site-footer ul li { margin-bottom: 10px; }
.site-footer ul a {
  color: rgba(255,255,255,0.65);
  font-size: 14px;
  transition: color var(--transition-mid);
}
.site-footer ul a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 48px;
  padding-top: 16px;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
}

/* 响应式 */
@media (max-width: 991px) {
  .hero-section { padding: 120px 0 64px; }
  .hero-title { font-size: 32px; }
  .trust-strip { flex-wrap: wrap; }
  .trust-item { flex: 0 0 50%; border-left: none; }
  .screenshot-card { margin: 0 24px; }
  .navbar-collapse {
    background: var(--surface);
    padding: 20px;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    margin-top: 12px;
    border: 1px solid var(--border);
  }
  .navbar-nav { align-items: flex-start; }
  .navbar-nav .nav-link {
    line-height: 2.6;
    margin-left: 0;
    color: var(--text-main);
    display: block;
  }
  .navbar-nav .nav-link::after { bottom: 8px; }
  .btn-download-nav { margin-left: 0; margin-top: 12px; color: var(--primary); }
  .site-header.scrolled .navbar-collapse { background: var(--surface); }
  .site-header.scrolled .navbar-nav .nav-link { color: var(--text-main); }
  .site-header.scrolled .btn-download-nav { color: var(--primary); border-color: var(--primary); }
  .feature-wide img { width: 140px; height: 100px; }
}

@media (max-width: 767px) {
  .hero-section { padding: 100px 0 48px; }
  .hero-title { font-size: 28px; }
  .hero-visual { margin-top: 32px; }
  .section-title { font-size: 24px; margin-bottom: 32px; }
  .features-section,
  .screenshots-section,
  .requirements-section,
  .reviews-section,
  .download-section,
  .news-section,
  .faq-section,
  .cta-section { padding: 64px 0; }
  .trust-num { font-size: 20px; }
  .download-buttons { gap: 12px; }
  .download-btn { width: 140px; height: 60px; }
  .download-btn i { font-size: 18px; }
  .news-item { flex-direction: column; }
  .news-thumb { width: 100%; height: 160px; }
  .news-summary { white-space: normal; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
  .news-title { white-space: normal; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; }
  .screenshot-card { margin: 0 8px; }
  .screenshot-caption { padding: 14px 16px; font-size: 14px; }
  .carousel-control-prev.custom-control { left: 4px; }
  .carousel-control-next.custom-control { right: 4px; }
  .feature-wide .feature-body { flex-direction: column; }
  .feature-wide img { width: 100%; height: auto; margin-top: 16px; }
  .feature-full { flex-direction: column; text-align: center; gap: 16px; }
  .feature-full p { max-width: 100%; }
  .req-item { flex-direction: column; align-items: flex-start; gap: 4px; }
  .req-item strong { text-align: left; }
  .cta-title { font-size: 26px; }
  .site-footer { padding: 48px 0 24px; }
  .footer-bottom { margin-top: 32px; }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .hero-title { animation: none !important; }
  .hero-visual { animation: none !important; }
}

/* roulang page: article */
:root {
  --primary: #0E4F4C;
  --primary-dark: #083A38;
  --primary-light: #E9F1EF;
  --accent: #C9A36A;
  --bg-body: #FAFAF8;
  --surface: #FFFFFF;
  --text-main: #1F2937;
  --text-muted: #6B7280;
  --border: #E5E7EB;
  --radius-card: 8px;
  --radius-btn: 4px;
  --shadow-card: 0 8px 24px rgba(14, 79, 76, 0.06);
  --shadow-card-hover: 0 12px 32px rgba(14, 79, 76, 0.10);
  --transition-mid: 200ms ease-out;
  --transition-fast: 150ms ease-out;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-main);
  background: var(--bg-body);
  -webkit-font-smoothing: antialiased;
}

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

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

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

.container {
  max-width: 1200px;
}

@media (min-width: 1400px) {
  .container {
    max-width: 1200px;
  }
}

/* ========== Header / Nav ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1080;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition-mid), box-shadow var(--transition-mid), border-color var(--transition-mid);
}

.site-header.scrolled {
  background: var(--primary-dark);
  box-shadow: 0 4px 24px rgba(8, 58, 56, 0.16);
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

.site-header .navbar {
  min-height: 68px;
  padding: 0;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0;
  margin-right: 0;
}

.brand-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  border-radius: 6px;
  color: var(--primary);
  transition: background var(--transition-mid), color var(--transition-mid);
  flex-shrink: 0;
}

.site-header.scrolled .brand-icon {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.02em;
  transition: color var(--transition-mid);
  white-space: nowrap;
}

.site-header.scrolled .brand-text {
  color: #ffffff;
}

.navbar-nav {
  align-items: center;
}

.navbar-nav .nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  padding: 8px 2px;
  margin: 0 16px;
  position: relative;
  transition: color var(--transition-mid);
}

.site-header.scrolled .navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.85);
}

.navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  opacity: 0;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition-mid), opacity var(--transition-mid);
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
  opacity: 1;
  transform: scaleX(1);
}

.site-header.scrolled .navbar-nav .nav-link:hover,
.site-header.scrolled .navbar-nav .nav-link.active {
  color: #ffffff;
}

.btn-download-nav {
  background: var(--primary);
  color: #ffffff;
  border-radius: var(--radius-btn);
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 500;
  border: none;
  transition: background var(--transition-mid), transform var(--transition-mid), box-shadow var(--transition-mid);
  margin-left: 16px;
}

.site-header.scrolled .btn-download-nav {
  background: #ffffff;
  color: var(--primary-dark);
}

.btn-download-nav:hover {
  background: #12625e;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(14, 79, 76, 0.20);
}

.site-header.scrolled .btn-download-nav:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.navbar-toggler {
  border: none;
  padding: 4px 8px;
  border-radius: var(--radius-btn);
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 3px rgba(14, 79, 76, 0.12);
}

.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3e%3cpath stroke='rgba(14,79,76,0.9)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
  width: 1.4em;
  height: 1.4em;
}

.site-header.scrolled .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3e%3cpath stroke='rgba(255,255,255,0.9)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ========== Buttons ========== */
.btn {
  border-radius: var(--radius-btn);
  font-weight: 500;
  transition: background var(--transition-mid), color var(--transition-mid), border-color var(--transition-mid), transform var(--transition-mid), box-shadow var(--transition-mid);
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  padding: 12px 32px;
  font-size: 15px;
}

.btn-primary:hover,
.btn-primary:focus {
  background: #12625e;
  border-color: #12625e;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(14, 79, 76, 0.18);
}

.btn-outline-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--primary);
  color: var(--primary);
  background: transparent;
  border-radius: var(--radius-btn);
  padding: 12px 32px;
  font-size: 14px;
  font-weight: 500;
}

.btn-outline-cta:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
}

/* ========== Breadcrumb ========== */
.breadcrumb-wrap {
  background: var(--primary-light);
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.breadcrumb {
  margin: 0;
  background: transparent;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  list-style: none;
}

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

.breadcrumb-item a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
  color: var(--accent);
}

.breadcrumb-item + .breadcrumb-item::before {
  content: '/';
  color: var(--text-muted);
  padding: 0 8px;
}

.breadcrumb-item.active {
  color: var(--text-muted);
  max-width: 380px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ========== Article Main ========== */
.article-main {
  padding: 64px 0 32px;
}

.article-wrap {
  max-width: 880px;
  margin: 0 auto;
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: 56px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
}

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

.article-header h1 {
  font-size: 32px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 24px;
  color: var(--text-muted);
  font-size: 13px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-item i {
  color: var(--accent);
  font-size: 14px;
}

/* ========== Article Content Typography ========== */
.article-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-main);
}

.article-content > *:first-child {
  margin-top: 0;
}

.article-content p {
  margin-bottom: 24px;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4 {
  color: var(--text-main);
  font-weight: 600;
  line-height: 1.4;
}

.article-content h1 {
  font-size: 26px;
  margin: 48px 0 16px;
}

.article-content h2 {
  font-size: 24px;
  margin: 48px 0 16px;
}

.article-content h3 {
  font-size: 20px;
  margin: 32px 0 12px;
}

.article-content h4 {
  font-size: 17px;
  margin: 24px 0 8px;
}

.article-content ul,
.article-content ol {
  margin-bottom: 24px;
  padding-left: 1.5em;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content blockquote {
  border-left: 3px solid var(--accent);
  background: var(--primary-light);
  padding: 16px 24px;
  border-radius: 0 var(--radius-btn) var(--radius-btn) 0;
  margin-bottom: 24px;
  color: var(--text-muted);
  font-style: normal;
}

.article-content img {
  border-radius: var(--radius-btn);
  border: 1px solid var(--border);
  margin: 32px auto;
  height: auto;
}

.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
  transition: color var(--transition-fast);
}

.article-content a:hover {
  color: var(--accent);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
  font-size: 14px;
}

.article-content table th,
.article-content table td {
  padding: 12px 16px;
  border: 1px solid var(--border);
  text-align: left;
}

.article-content table th {
  background: var(--primary-light);
  font-weight: 600;
  color: var(--primary-dark);
}

.article-content pre {
  background: var(--primary-dark);
  color: #E5E7EB;
  padding: 20px 24px;
  border-radius: var(--radius-card);
  overflow-x: auto;
  margin-bottom: 24px;
  font-size: 14px;
  line-height: 1.7;
}

.article-content code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

.article-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}

/* ========== Article CTA ========== */
.article-cta {
  text-align: center;
  padding: 40px 0 8px;
  border-top: 1px solid var(--border);
  margin-top: 48px;
}

.article-cta .btn-outline-cta {
  min-width: 160px;
  justify-content: center;
}

/* ========== Article Not Found ========== */
.article-not-found {
  text-align: center;
  padding: 40px 0;
}

.article-not-found h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
}

.article-not-found p {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

/* ========== Related Section ========== */
.related-section {
  padding: 64px 0 24px;
  background: var(--bg-body);
}

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

.section-header h2 {
  font-size: 28px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}

.section-header p {
  font-size: 14px;
  color: var(--text-muted);
}

.related-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  height: 100%;
  transition: transform var(--transition-mid), box-shadow var(--transition-mid);
  text-decoration: none;
  color: inherit;
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  text-decoration: none;
}

.related-card:focus-visible {
  outline: 3px solid rgba(201, 163, 106, 0.6);
  outline-offset: 2px;
}

.related-thumb {
  width: 100%;
  height: 160px;
  overflow: hidden;
  background: var(--primary-light);
}

.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 300ms ease-out;
}

.related-card:hover .related-thumb img {
  transform: scale(1.04);
}

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

.tag {
  align-self: flex-start;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: var(--radius-btn);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.related-body h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 10px;
  color: var(--text-main);
  transition: color var(--transition-fast);
}

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

.related-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 12px;
}

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

.related-date i {
  color: var(--accent);
  font-size: 12px;
}

/* ========== Back Section ========== */
.back-section {
  text-align: center;
  padding: 24px 0 80px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: var(--radius-btn);
  transition: color var(--transition-mid), background var(--transition-mid);
}

.back-link:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.back-link i {
  transition: transform var(--transition-mid);
}

.back-link:hover i {
  transform: translateX(-3px);
}

/* ========== Footer ========== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 64px 0 0;
  position: relative;
  border-top: 2px solid var(--accent);
}

.site-footer::after {
  content: '';
  position: absolute;
  top: -3px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--primary-light);
}

.footer-brand {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  max-width: 320px;
  margin-bottom: 0;
}

.site-footer h4 {
  font-size: 14px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

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

.site-footer ul a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
  line-height: 1.8;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  margin-top: 48px;
  padding: 20px 0 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
}

/* ========== Responsive ========== */
@media (max-width: 991.98px) {
  .navbar-collapse {
    background: var(--surface);
    border-radius: var(--radius-card);
    padding: 16px 24px;
    margin-top: 12px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border);
  }

  .site-header.scrolled .navbar-collapse {
    background: var(--surface);
  }

  .navbar-collapse .nav-link {
    color: var(--text-main) !important;
    margin: 6px 0;
    padding: 8px 0;
  }

  .navbar-collapse .nav-link::after {
    left: 0;
    transform-origin: left center;
  }

  .btn-download-nav {
    margin-left: 0;
    margin-top: 12px;
    width: 100%;
    text-align: center;
  }

  .site-header.scrolled .btn-download-nav {
    background: var(--primary);
    color: #ffffff;
  }

  .site-header.scrolled .btn-download-nav:hover {
    background: #12625e;
    color: #ffffff;
  }
}

@media (max-width: 767.98px) {
  .article-main {
    padding: 40px 0 24px;
  }

  .article-wrap {
    padding: 32px 20px;
    border-radius: var(--radius-card);
    border-left: none;
    border-right: none;
  }

  .article-header h1 {
    font-size: 26px;
  }

  .article-meta {
    gap: 10px 16px;
    font-size: 12px;
  }

  .article-content {
    font-size: 15px;
    line-height: 1.8;
  }

  .article-content h2 {
    font-size: 21px;
  }

  .article-content h3 {
    font-size: 18px;
  }

  .breadcrumb-item.active {
    max-width: 220px;
  }

  .related-section {
    padding: 48px 0 16px;
  }

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

  .related-thumb {
    height: 140px;
  }

  .back-section {
    padding: 16px 0 56px;
  }

  .site-footer {
    padding: 48px 0 0;
  }

  .site-footer .col-lg-4,
  .site-footer .col-lg-2,
  .site-footer .col-lg-3 {
    margin-bottom: 24px;
  }

  .footer-bottom {
    margin-top: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: category1 */
:root {
      --primary: #0E4F4C;
      --primary-dark: #083A38;
      --primary-light: #E9F1EF;
      --accent: #C9A36A;
      --bg-body: #FAFAF8;
      --surface: #FFFFFF;
      --text-main: #1F2937;
      --text-muted: #6B7280;
      --border: #E5E7EB;
      --success: #2D7A4F;
      --danger: #C0392B;
      --radius-card: 8px;
      --radius-btn: 4px;
      --shadow-card: 0 8px 24px rgba(14,79,76,0.06);
      --shadow-hover: 0 12px 32px rgba(14,79,76,0.10);
      --transition-mid: 0.2s ease-out;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
      background: var(--bg-body);
      color: var(--text-main);
      font-size: 16px;
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color var(--transition-mid), background var(--transition-mid), border-color var(--transition-mid);
    }

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

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

    .container {
      max-width: 1200px;
    }

    .section-padding {
      padding: 96px 0;
    }

    .section-head {
      text-align: center;
      margin-bottom: 56px;
    }

    .section-head h2 {
      font-size: 28px;
      font-weight: 600;
      line-height: 1.3;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .section-head p {
      font-size: 14px;
      color: var(--text-muted);
      margin: 0;
    }

    h1, h2, h3, h4, h5, h6 {
      line-height: 1.3;
      margin-bottom: 0.5em;
    }

    h1 {
      font-size: 32px;
      font-weight: 700;
    }

    h2 {
      font-size: 28px;
      font-weight: 600;
    }

    h3 {
      font-size: 20px;
      font-weight: 600;
    }

    /* ===== Buttons ===== */
    .btn {
      border-radius: var(--radius-btn);
      font-size: 15px;
      font-weight: 600;
      padding: 12px 24px;
      border: 1px solid transparent;
      transition: background var(--transition-mid), color var(--transition-mid), border-color var(--transition-mid), opacity var(--transition-mid), transform var(--transition-mid), box-shadow var(--transition-mid);
    }

    .btn-primary-custom {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
    }

    .btn-primary-custom:hover {
      background: #115e59;
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(14,79,76,0.2);
    }

    .btn-outline-custom {
      background: transparent;
      color: var(--primary);
      border-color: var(--primary);
    }

    .btn-outline-custom:hover {
      background: var(--primary-light);
      color: var(--primary-dark);
      transform: translateY(-2px);
    }

    .btn-light-custom {
      background: #fff;
      color: var(--primary-dark);
      border-color: #fff;
    }

    .btn-light-custom:hover {
      background: var(--primary-light);
      color: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(8,58,56,0.15);
    }

    .btn-cta {
      background: var(--accent);
      color: var(--primary-dark);
      border-color: var(--accent);
      font-size: 16px;
      padding: 14px 36px;
    }

    .btn-cta:hover {
      background: #b88f58;
      color: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(201,163,106,0.25);
    }

    /* ===== Header ===== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid transparent;
      transition: background 0.3s ease, box-shadow 0.3s ease;
    }

    .site-header.scrolled {
      background: var(--primary-dark);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      box-shadow: 0 4px 24px rgba(8,58,56,0.18);
    }

    .site-header .navbar {
      min-height: 68px;
      padding: 0;
    }

    .navbar-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      white-space: nowrap;
    }

    .navbar-brand .brand-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      width: 24px;
      height: 24px;
    }

    .site-header.scrolled .navbar-brand {
      color: #fff;
    }

    .navbar-toggler {
      border: none;
      box-shadow: none !important;
    }

    .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(14,79,76,1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }

    .site-header.scrolled .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(255,255,255,0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }

    .navbar-nav .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      padding: 0 4px !important;
      margin: 0 16px;
      position: relative;
      text-decoration: none;
    }

    .navbar-nav .nav-link::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -4px;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: width var(--transition-mid);
    }

    .navbar-nav .nav-link:hover::after,
    .navbar-nav .nav-link.active::after {
      width: 20px;
    }

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

    .site-header.scrolled .navbar-nav .nav-link {
      color: rgba(255,255,255,0.88);
    }

    .site-header.scrolled .navbar-nav .nav-link.active {
      color: #fff;
    }

    .btn-download-nav {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
      font-size: 14px;
      padding: 8px 20px;
      margin-left: 24px;
      border-radius: var(--radius-btn);
    }

    .btn-download-nav:hover {
      background: #115e59;
      color: #fff;
      transform: translateY(2px);
      box-shadow: 0 4px 16px rgba(14,79,76,0.25);
    }

    .site-header.scrolled .btn-download-nav {
      background: var(--accent);
      color: var(--primary-dark);
      border-color: var(--accent);
    }

    /* ===== Hero ===== */
    .page-hero {
      position: relative;
      padding: 130px 0 0;
      color: #fff;
      background: linear-gradient(135deg, rgba(8,58,56,0.94), rgba(14,79,76,0.86)), url('/assets/images/backpic/back-1.webp') center/cover;
    }

    .page-hero .hero-container {
      position: relative;
      z-index: 2;
    }

    .hero-breadcrumb {
      font-size: 13px;
      color: rgba(255,255,255,0.7);
      margin-bottom: 24px;
    }

    .hero-breadcrumb a {
      color: rgba(255,255,255,0.8);
      border-bottom: 1px solid transparent;
    }

    .hero-breadcrumb a:hover {
      color: var(--accent);
      border-bottom-color: var(--accent);
    }

    .hero-breadcrumb .sep {
      margin: 0 8px;
      color: rgba(255,255,255,0.4);
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255,255,255,0.12);
      border: 1px solid rgba(255,255,255,0.18);
      border-radius: 4px;
      padding: 4px 12px;
      font-size: 13px;
      letter-spacing: 0.02em;
      color: rgba(255,255,255,0.9);
      margin-bottom: 16px;
    }

    .hero-badge i {
      color: var(--accent);
    }

    .hero-title {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.3;
      color: #fff;
      margin-bottom: 16px;
    }

    .hero-desc {
      font-size: 14px;
      color: rgba(255,255,255,0.62);
      margin-bottom: 16px;
    }

    .hero-subtitle {
      font-size: 16px;
      line-height: 1.8;
      color: rgba(255,255,255,0.82);
      margin-bottom: 28px;
      max-width: 520px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .hero-actions .btn {
      min-width: 150px;
      text-align: center;
    }

    .hero-metrics {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      border-top: 1px solid rgba(255,255,255,0.16);
      padding: 20px 0;
      gap: 0;
      margin-top: 8px;
    }

    .metric-item {
      padding: 8px 28px;
      border-left: 1px solid rgba(255,255,255,0.14);
      display: flex;
      flex-direction: column;
      align-items: flex-start;
    }

    .metric-item:first-child {
      padding-left: 0;
      border-left: none;
    }

    .metric-item strong {
      font-size: 22px;
      font-weight: 700;
      line-height: 1.2;
    }

    .metric-item span {
      font-size: 13px;
      color: rgba(255,255,255,0.6);
      margin-top: 2px;
    }

    .hero-visual {
      position: relative;
      padding-bottom: 48px;
    }

    .hero-card {
      background: rgba(255,255,255,0.96);
      border-radius: 12px;
      box-shadow: 0 24px 64px rgba(8,58,56,0.18);
      overflow: hidden;
      color: var(--text-main);
      border: 1px solid rgba(255,255,255,0.2);
    }

    .hero-card-top {
      padding: 14px 20px;
      display: flex;
      align-items: center;
      gap: 10px;
      border-bottom: 1px solid var(--border);
      background: #f7faf9;
    }

    .hero-card-dots {
      display: flex;
      gap: 4px;
    }

    .hero-card-dots span {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #d6e4e1;
    }

    .hero-card-dots span:first-child {
      background: var(--accent);
    }

    .hero-card-label {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
      margin-left: 6px;
    }

    .hero-card-body {
      padding: 24px 20px;
    }

    .hero-select-label {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 12px;
    }

    .hero-platform-list {
      display: flex;
      flex-direction: column;
      gap: 8px;
      margin-bottom: 20px;
    }

    .hero-platform-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 14px;
      border: 1px solid var(--border);
      border-radius: 6px;
      background: var(--surface);
      transition: border-color var(--transition-mid), box-shadow var(--transition-mid);
    }

    .hero-platform-item:hover {
      border-color: var(--accent);
      box-shadow: 0 2px 12px rgba(201,163,106,0.12);
    }

    .hero-platform-item i {
      width: 22px;
      text-align: center;
      font-size: 18px;
      color: var(--primary);
    }

    .hero-platform-item .pf-name {
      font-weight: 600;
      font-size: 15px;
      flex: 1;
    }

    .hero-platform-item .pf-ver {
      font-size: 13px;
      color: var(--text-muted);
    }

    .hero-card-footer {
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: var(--primary-dark);
      color: #fff;
    }

    .hero-card-footer .badge {
      background: var(--accent);
      color: var(--primary-dark);
      font-size: 12px;
      border-radius: 4px;
      padding: 4px 10px;
      font-weight: 600;
    }

    .hero-card-footer .update-text {
      font-size: 13px;
      color: rgba(255,255,255,0.7);
    }

    /* ===== Features ===== */
    .features-section {
      background: var(--bg-body);
    }

    .feature-card {
      background: var(--surface);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      padding: 32px;
      height: 100%;
      border: 1px solid rgba(229,231,235,0.55);
      transition: box-shadow var(--transition-mid), transform var(--transition-mid);
    }

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

    .feature-card .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: 6px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
    }

    .feature-card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 0;
    }

    .feature-card .feature-img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      border-radius: 6px;
      border: 1px solid var(--border);
    }

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

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

    .steps-section .section-head h2 {
      color: var(--primary-dark);
    }

    .step-item {
      background: var(--surface);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      height: 100%;
      position: relative;
      box-shadow: var(--shadow-card);
      border: 1px solid rgba(229,231,235,0.55);
      transition: box-shadow var(--transition-mid), transform var(--transition-mid);
    }

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

    .step-num {
      font-size: 32px;
      font-weight: 700;
      color: rgba(14,79,76,0.12);
      line-height: 1;
      margin-bottom: 20px;
    }

    .step-item .step-icon {
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      border-radius: 6px;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      margin-bottom: 16px;
    }

    .step-item h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 8px;
    }

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

    /* ===== Platforms ===== */
    .platforms-section {
      background: var(--surface);
    }

    .platform-box {
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      background: var(--surface);
      padding: 32px;
      height: 100%;
      transition: box-shadow var(--transition-mid), transform var(--transition-mid);
    }

    .platform-box:hover {
      box-shadow: var(--shadow-hover);
    }

    .platform-box h3 {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 20px;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border);
    }

    .platform-box h3 i {
      color: var(--primary);
      font-size: 22px;
    }

    .req-list {
      list-style: none;
      padding: 0;
      margin: 0 0 24px;
    }

    .req-list li {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      gap: 16px;
      padding: 12px 0;
      border-bottom: 1px solid var(--border);
      font-size: 14px;
    }

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

    .req-list li span {
      color: var(--text-muted);
      font-size: 13px;
      white-space: nowrap;
    }

    .req-list li strong {
      font-weight: 500;
      text-align: right;
      color: var(--text-main);
      font-size: 14px;
    }

    .platform-box .btn {
      width: 100%;
    }

    /* ===== Security ===== */
    .security-section {
      background: var(--primary-light);
    }

    .security-img {
      width: 100%;
      border-radius: 10px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-card);
    }

    .security-content h2 {
      margin-bottom: 16px;
    }

    .security-content > p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 24px;
      max-width: 480px;
    }

    .security-list {
      list-style: none;
      padding: 0;
      margin: 0;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .security-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      background: var(--surface);
      border-radius: var(--radius-card);
      padding: 16px 20px;
      border-left: 3px solid var(--accent);
      box-shadow: var(--shadow-card);
    }

    .security-list li i {
      color: var(--primary);
      font-size: 18px;
      margin-top: 2px;
    }

    .security-list li h3 {
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 2px;
    }

    .security-list li p {
      font-size: 13px;
      color: var(--text-muted);
      margin: 0;
      line-height: 1.65;
    }

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

    .faq-wrap {
      max-width: 820px;
      margin: 0 auto;
    }

    .accordion-item {
      border: none;
      border-bottom: 1px solid var(--border);
      background: transparent;
    }

    .accordion-button {
      background: transparent;
      color: var(--text-main);
      font-size: 16px;
      font-weight: 600;
      padding: 20px 16px;
      border: none;
      box-shadow: none;
    }

    .accordion-button:not(.collapsed) {
      background: transparent;
      color: var(--primary);
      box-shadow: none;
    }

    .accordion-button:not(.collapsed)::after {
      transform: rotate(45deg);
      filter: brightness(0) saturate(100%) invert(26%) sepia(42%) saturate(560%) hue-rotate(140deg) brightness(94%) contrast(96%);
    }

    .accordion-button::after {
      filter: brightness(0) saturate(100%) invert(26%) sepia(42%) saturate(560%) hue-rotate(140deg) brightness(94%) contrast(96%);
    }

    .accordion-button:focus {
      box-shadow: none;
      border-color: transparent;
    }

    .accordion-button:not(.collapsed)::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 3px;
      height: 24px;
      border-radius: 2px;
      background: var(--accent);
    }

    .accordion-item:first-of-type {
      border-top: 1px solid var(--border);
    }

    .accordion-body {
      padding: 0 16px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.85;
    }

    /* ===== CTA ===== */
    .cta-section {
      background: var(--primary-dark);
      padding: 88px 0;
      text-align: center;
      color: #fff;
      position: relative;
      overflow: hidden;
    }

    .cta-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: rgba(233,241,239,0.4);
    }

    .cta-section::after {
      content: '';
      position: absolute;
      top: 1px;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--accent);
    }

    .cta-section h2 {
      font-size: 28px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 16px;
    }

    .cta-section p {
      font-size: 16px;
      color: rgba(255,255,255,0.7);
      margin-bottom: 32px;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--primary-dark);
      color: rgba(255,255,255,0.8);
      padding: 72px 0 28px;
      position: relative;
    }

    .site-footer::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: rgba(233,241,239,0.35);
    }

    .site-footer::after {
      content: '';
      position: absolute;
      top: 1px;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--accent);
    }

    .site-footer .footer-brand {
      font-size: 20px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }

    .site-footer .footer-desc {
      font-size: 14px;
      line-height: 1.8;
      color: rgba(255,255,255,0.55);
      max-width: 280px;
    }

    .site-footer h4 {
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 16px;
    }

    .site-footer ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }

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

    .site-footer ul li a {
      font-size: 14px;
      color: rgba(255,255,255,0.6);
    }

    .site-footer ul li a:hover {
      color: var(--accent);
    }

    .footer-bottom {
      margin-top: 48px;
      padding-top: 24px;
      border-top: 1px solid rgba(255,255,255,0.12);
      text-align: center;
    }

    .footer-bottom p {
      font-size: 13px;
      color: rgba(255,255,255,0.45);
      margin: 0;
    }

    /* ===== Animations ===== */
    @keyframes fadeUp {
      from {
        opacity: 0;
        transform: translateY(12px);
      }
      to {
        opacity: 1;
        transform: none;
      }
    }

    .hero-title,
    .hero-badge,
    .hero-desc,
    .hero-subtitle,
    .hero-actions,
    .hero-metrics {
      animation: fadeUp 0.4s ease-out both;
    }

    .hero-title {
      animation-delay: 0.08s;
    }

    .hero-desc {
      animation-delay: 0.14s;
    }

    .hero-subtitle {
      animation-delay: 0.2s;
    }

    .hero-actions {
      animation-delay: 0.26s;
    }

    .hero-metrics {
      animation-delay: 0.32s;
    }

    .hero-visual {
      animation: fadeUp 0.4s ease-out 0.22s both;
    }

    /* ===== Responsive ===== */
    @media (min-width: 992px) {
      .navbar-expand-lg .navbar-nav .nav-link {
        padding-right: 0;
        padding-left: 0;
      }
    }

    @media (max-width: 991.98px) {
      .section-padding {
        padding: 72px 0;
      }

      .navbar-collapse {
        background: var(--surface);
        padding: 16px 0;
        border-radius: 0 0 8px 8px;
        box-shadow: 0 8px 24px rgba(14,79,76,0.1);
      }

      .site-header.scrolled .navbar-collapse {
        background: var(--primary-dark);
      }

      .navbar-nav .nav-link {
        padding: 10px 20px !important;
        margin: 0;
      }

      .btn-download-nav {
        margin-left: 0;
        margin-top: 12px;
        display: inline-block;
      }

      .page-hero {
        padding: 110px 0 0;
      }

      .hero-visual {
        margin-top: 32px;
      }

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

      .metric-item {
        padding: 8px 16px;
      }
    }

    @media (max-width: 767.98px) {
      .section-padding {
        padding: 56px 0;
      }

      .section-head {
        margin-bottom: 36px;
      }

      .page-hero {
        padding: 96px 0 0;
      }

      .hero-title {
        font-size: 26px;
      }

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

      .hero-metrics {
        gap: 8px 0;
      }

      .metric-item {
        width: 50%;
        border-left: none;
        padding: 8px 4px;
      }

      .metric-item:first-child {
        padding-left: 4px;
      }

      .hero-actions .btn {
        min-width: 128px;
      }

      .feature-card {
        padding: 24px;
      }

      .feature-card .feature-img {
        margin-top: 16px;
        height: 140px;
      }

      .step-item {
        padding: 24px;
      }

      .platform-box {
        padding: 24px;
      }

      .req-list li {
        flex-direction: column;
        gap: 4px;
      }

      .req-list li strong {
        text-align: left;
      }

      .security-content > p {
        max-width: none;
      }

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

      .site-footer {
        padding-top: 56px;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      html {
        scroll-behavior: auto;
      }

      *,
      *::before,
      *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
      }

      .hero-title,
      .hero-badge,
      .hero-desc,
      .hero-subtitle,
      .hero-actions,
      .hero-metrics,
      .hero-visual {
        animation: none;
        opacity: 1;
        transform: none;
      }

      .feature-card:hover,
      .step-item:hover,
      .platform-box:hover,
      .btn:hover {
        transform: none;
      }
    }