/**
 * duiwaiwangzhan 站点统一视觉与移动端抽屉导航
 * 与 Tailwind 主题 primary #093491 对齐
 */
:root {
  --site-primary: #093491;
  --site-primary-700: #072970;
  --site-surface: #ffffff;
  --site-bg: #f8fafc;
  --site-border: #e2e8f0;
  --site-muted: #64748b;
  --site-shadow: 0 4px 24px rgba(9, 52, 145, 0.08);
  --site-radius: 12px;
  --site-nav-z: 10040;
  --site-drawer-z: 10050;
}

/* —— 移动端汉堡按钮 —— */
.site-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  margin: 0;
  border: none;
  border-radius: 10px;
  background: rgba(9, 52, 145, 0.06);
  color: var(--site-primary);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
  flex-shrink: 0;
}

.site-nav-toggle:hover {
  background: rgba(9, 52, 145, 0.12);
}

.site-nav-toggle:focus-visible {
  outline: 2px solid var(--site-primary);
  outline-offset: 2px;
}

.site-nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 1px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 767px) {
  .site-nav-toggle {
    display: flex;
  }
}

/* —— 遮罩与抽屉 —— */
.site-nav-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--site-nav-z);
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.site-nav-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.site-nav-drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: var(--site-drawer-z);
  width: min(88vw, 300px);
  max-width: 100%;
  height: 100%;
  background: var(--site-surface);
  box-shadow: -8px 0 32px rgba(15, 23, 42, 0.12);
  transform: translateX(100%);
  transition: transform 0.28s cubic-bezier(0.32, 0.72, 0, 1);
  display: flex;
  flex-direction: column;
}

.site-nav-drawer.is-open {
  transform: translateX(0);
}

.site-nav-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  border-bottom: 1px solid var(--site-border);
  flex-shrink: 0;
}

.site-nav-drawer-title {
  font-size: 15px;
  font-weight: 600;
  color: #0f172a;
}

.site-nav-drawer-close {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 10px;
  background: transparent;
  font-size: 24px;
  line-height: 1;
  color: var(--site-muted);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.site-nav-drawer-close:hover {
  background: var(--site-bg);
  color: var(--site-primary);
}

.site-nav-drawer-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 0 24px;
  -webkit-overflow-scrolling: touch;
}

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

.site-nav-drawer-nav li {
  margin: 0;
}

.site-nav-drawer-nav a {
  display: block;
  padding: 14px 22px;
  font-size: 15px;
  font-weight: 500;
  color: #334155;
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.site-nav-drawer-nav a:hover,
.site-nav-drawer-nav a:focus-visible {
  background: rgba(9, 52, 145, 0.06);
  color: var(--site-primary);
  border-left-color: var(--site-primary);
}

body.site-nav-drawer-open {
  overflow: hidden;
}

/* —— 通用内容块（可与 Tailwind 并存） —— */
.site-prose-muted {
  color: var(--site-muted);
}

.site-card-elevated {
  border-radius: var(--site-radius);
  box-shadow: var(--site-shadow);
  border: 1px solid var(--site-border);
  background: var(--site-surface);
}

/* —— 与 legacy styles.css 并存时的品牌色对齐 —— */
.navbar .nav-logo a {
  color: var(--site-primary);
}

.navbar .nav-logo a:hover {
  color: var(--site-primary-700);
}

.navbar .nav-menu a:hover {
  color: var(--site-primary);
}

.navbar .nav-menu a::after {
  background: var(--site-primary);
}

.btn-login:hover {
  border-color: var(--site-primary);
  color: var(--site-primary);
}

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

.btn-register:hover {
  background: var(--site-primary-700);
  border-color: var(--site-primary-700);
  color: #fff;
}

/* —— 整页背景（需 body 带 .site-page） —— */
body.site-page {
  background: linear-gradient(180deg, #eef2f7 0%, #f8fafc 22%, #f8fafc 100%);
}

/* —— 顶栏 —— */
nav.site-top-nav {
  box-shadow: 0 1px 0 rgba(9, 52, 145, 0.07), 0 8px 32px rgba(15, 23, 42, 0.06);
}

/* —— Hero 柔光（与渐变 Banner 叠加） —— */
#bannerSection.site-hero-glow {
  position: relative;
  overflow: hidden;
}

#bannerSection.site-hero-glow::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 90% 60% at 50% -30%, rgba(9, 52, 145, 0.14), transparent 55%);
  z-index: 1;
}

#bannerSection.site-hero-glow #bannerTrack,
#bannerSection.site-hero-glow #bannerImage {
  position: relative;
  z-index: 2;
}

/* —— 主内容区卡片（选课/首页网格） —— */
main.pt-16 .card {
  border-radius: 0.875rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
  transition: box-shadow 0.22s ease, border-color 0.22s ease;
}

main.pt-16 .card:hover {
  box-shadow: 0 16px 40px rgba(9, 52, 145, 0.12);
  border-color: #c7d7fe;
}

/* —— 数据条带 —— */
.site-stats-band {
  background: linear-gradient(180deg, #ffffff 0%, #f1f5f9 45%, #ffffff 100%);
  border-top: 1px solid rgba(9, 52, 145, 0.08);
  border-bottom: 1px solid rgba(9, 52, 145, 0.08);
}

.site-stat-card {
  background: linear-gradient(165deg, #ffffff 0%, #f8fafc 100%);
  border: 1px solid var(--site-border);
  border-radius: 1rem;
  padding: 1.25rem 0.75rem;
  box-shadow: 0 2px 8px rgba(9, 52, 145, 0.05);
  transition: box-shadow 0.2s ease;
}

.site-stat-card:hover {
  box-shadow: 0 10px 28px rgba(9, 52, 145, 0.1);
}

/* —— 版块小标题 —— */
.site-section-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--site-primary);
}

/* —— 合作伙伴区 —— */
.site-partners-wrap .site-partners-grid {
  gap: 1rem 1.5rem;
}

.site-partner-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.25rem;
  height: 3.25rem;
  padding: 0.5rem 1rem;
  border-radius: 0.75rem;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--site-border);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  transition: opacity 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.site-partner-link img {
  max-height: 2.5rem;
  width: auto;
  object-fit: contain;
}

@media (min-width: 768px) {
  .site-partner-link {
    min-height: 4rem;
    height: 4rem;
  }

  .site-partner-link img {
    max-height: 3.25rem;
  }
}

.site-partner-link:hover {
  opacity: 1 !important;
  border-color: #c7d7fe;
  box-shadow: 0 8px 24px rgba(9, 52, 145, 0.1);
}

/* —— 服务卡片图标底 —— */
.site-service-icon-wrap {
  border-radius: 0.75rem;
  background: linear-gradient(145deg, #eef4ff 0%, #e0eaff 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

/* —— 页脚 —— */
footer.site-footer {
  background: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
  border-top: 1px solid rgba(9, 52, 145, 0.1);
  box-shadow: 0 -4px 24px rgba(15, 23, 42, 0.04);
}

/* —— 版块标题区 —— */
.site-section-intro h2 {
  letter-spacing: -0.02em;
}

.site-section-intro .text-muted {
  max-width: 42rem;
  line-height: 1.65;
}

.site-section-intro .site-section-rule {
  width: 3rem;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--site-primary), #a4bcfd);
  margin-top: 0.75rem;
}

/* —— 顶栏链接 —— */
#navMenu a {
  border-radius: 0.375rem;
  padding: 0.25rem 0.5rem;
  margin: 0 -0.125rem;
  transition: color 0.2s, background 0.2s;
}

#navMenu a:hover {
  background: rgba(9, 52, 145, 0.06);
}

/* —— 校区卡片 —— */
.site-campus-card {
  overflow: hidden;
  border-radius: 0.875rem;
  transition: box-shadow 0.22s ease;
}

.site-campus-card:hover {
  box-shadow: 0 12px 32px rgba(9, 52, 145, 0.1);
}

.site-campus-card .aspect-video {
  background: linear-gradient(180deg, #f1f5f9 0%, #e2e8f0 100%);
}