/* ===== RESET & BASE ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: #333; line-height: 1.7; background: #fff;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: color 0.3s; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: 1rem; }

/* ===== CSS VARIABLES ===== */
:root {
  --primary: #2E7D32;
  --primary-light: #4CAF50;
  --primary-dark: #1B5E20;
  --secondary: #1976D2;
  --accent: #FFB300;
  --white: #FFFFFF;
  --light: #F5F5F5;
  --gray: #9E9E9E;
  --dark: #333333;
  --shadow: 0 2px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.15);
  --radius: 10px;
  --nav-height: 80px;
  --nav-height-scrolled: 60px;
  --transition: 0.3s ease;
}

/* ===== HEADER / NAVBAR ===== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-height); transition: all var(--transition);
  background: rgba(255,255,255,0.97); backdrop-filter: blur(10px);
}
.header.scrolled {
  height: var(--nav-height-scrolled); box-shadow: var(--shadow);
}
.header-inner {
  max-width: 1280px; margin: 0 auto; padding: 0 40px;
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
}
.logo { display: flex; align-items: center; margin-left: 24px; }
.logo-img { height: 44px; width: auto; display: block; transition: height var(--transition); }
.header.scrolled .logo-img { height: 36px; }

/* ===== DESKTOP NAV ===== */
.nav { display: flex; align-items: center; }
.nav-list { display: flex; gap: 4px; }
.nav-item { position: relative; }
.nav-link {
  display: flex; align-items: center; gap: 4px; padding: 10px 16px;
  font-size: 0.95rem; font-weight: 500; color: var(--dark);
  border-radius: 8px; transition: all var(--transition); white-space: nowrap;
}
.nav-link:hover, .nav-link.active { color: var(--primary); background: rgba(46,125,50,0.06); }
.nav-link .arrow { font-size: 0.65rem; transition: transform var(--transition); }
.nav-item:hover > .nav-link .arrow { transform: rotate(180deg); }

/* Dropdown Level 1 */
.dropdown {
  position: absolute; top: 100%; left: 50%; transform: translateX(-50%) translateY(8px);
  min-width: 200px; background: rgba(255,255,255,0.98); backdrop-filter: blur(10px);
  border-radius: var(--radius); box-shadow: var(--shadow-lg);
  padding: 8px; opacity: 0; visibility: hidden; transition: all var(--transition);
  border: 1px solid rgba(0,0,0,0.06);
}
.nav-item:hover > .dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.dropdown-item { position: relative; }
.dropdown-link {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px; font-size: 0.9rem; color: var(--dark);
  border-radius: 8px; transition: all var(--transition);
}
.dropdown-link:hover, .dropdown-link.active { background: rgba(46,125,50,0.08); color: var(--primary); }

/* Dropdown Level 2 (nested) */
.dropdown .dropdown {
  top: -10px; left: 100%; transform: translateX(15px);
  margin-left: 5px; /* 增加间距 */
}
.dropdown-item:hover > .dropdown { opacity: 1; visibility: visible; transform: translateX(0); }
.dropdown .nav-item:hover > .dropdown { opacity: 1; visibility: visible; transform: translateX(0); }
.dropdown .dropdown .dropdown-link .arrow { transform: rotate(-90deg); }
.dropdown .dropdown .dropdown-link:hover .arrow { transform: rotate(-90deg); }

/* 确保二级菜单项有相对定位 */
.dropdown-item { position: relative; }
.dropdown .nav-item { position: relative; }

/* ===== HAMBURGER ===== */
.hamburger {
  display: none; width: 44px; height: 44px; border-radius: 8px;
  align-items: center; justify-content: center; transition: background var(--transition);
  cursor: pointer;
}
.hamburger:hover { background: rgba(0,0,0,0.05); }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--dark); transition: all var(--transition); position: relative; }
.hamburger span::before, .hamburger span::after { content: ''; position: absolute; left: 0; width: 100%; height: 100%; background: var(--dark); transition: all var(--transition); }
.hamburger span::before { top: -7px; }
.hamburger span::after { bottom: -7px; }
.hamburger.active span { background: transparent; }
.hamburger.active span::before { top: 0; transform: rotate(45deg); }
.hamburger.active span::after { bottom: 0; transform: rotate(-45deg); }

/* ===== RESPONSIVE NAV ===== */
@media (max-width: 992px) {
  .nav { display: none !important; }
  .hamburger { display: flex; }
  /* 手机�?LOGO 向右调整 */
  .logo { margin-left: 30px; }
  .header-inner { padding: 0 10px; }
}
@media (min-width: 993px) {
  .mobile-nav { display: none !important; }
}

/* ===== MOBILE NAV ===== */
.mobile-nav {
  position: fixed; top: 0; right: -100%; width: 100%; height: 100vh;
  background: rgba(255,255,255,0.98); backdrop-filter: blur(20px);
  z-index: 999; transition: right 0.4s cubic-bezier(0.4,0,0.2,1);
  overflow-y: auto; padding: 80px 24px 24px;
}
.mobile-nav.open { right: 0; }
.mobile-nav .m-nav-item { border-bottom: 1px solid #eee; }
.mobile-nav .m-nav-link {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0; font-size: 1.05rem; font-weight: 500; color: var(--dark);
}
.mobile-nav .m-nav-link.active { color: var(--primary); }
.mobile-nav .m-dropdown { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; padding-left: 20px; }
.mobile-nav .m-dropdown.open { max-height: 2000px; }
.mobile-nav .m-dropdown .m-nav-link { font-size: 0.95rem; padding: 10px 0; }
.mobile-nav .m-dropdown .m-dropdown { padding-left: 16px; }
.mobile-nav .m-arrow { transition: transform 0.3s; font-size: 0.75rem; color: var(--gray); }
.mobile-nav .m-arrow.open { transform: rotate(180deg); }

/* ===== HERO ===== */
.hero {
  position: relative; height: 100vh; min-height: 600px; display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.hero-slider { position: absolute; inset: 0; }
.hero-slide {
  position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease;
  background-size: cover; background-position: center;
}
.hero-slide.active { opacity: 1; }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(27,94,32,0.1), rgba(25,118,210,0.1));
}
.hero-content { position: relative; z-index: 2; text-align: center; color: white; max-width: 800px; padding: 0 20px; }
.hero-content h1 { font-size: clamp(2.2rem, 5vw, 4rem); font-weight: 800; margin-bottom: 16px; text-shadow: 0 2px 20px rgba(0,0,0,0.3); }
.hero-content p { font-size: clamp(1rem, 2vw, 1.3rem); margin-bottom: 32px; opacity: 0.95; text-shadow: 0 1px 10px rgba(0,0,0,0.3); }
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: 50px; font-weight: 600; font-size: 1rem;
  transition: all var(--transition); cursor: pointer;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(46,125,50,0.4); }
.btn-outline { background: transparent; color: white; border: 2px solid rgba(255,255,255,0.6); }
.btn-outline:hover { background: white; color: var(--primary); border-color: white; }

/* ===== SECTIONS ===== */
.section { padding: 80px 0; }
.section-alt { background: var(--light); }
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem); font-weight: 800; color: var(--dark);
  margin-bottom: 12px; position: relative; display: inline-block;
}
.section-header h2::after {
  content: ''; position: absolute; bottom: -8px; left: 50%; transform: translateX(-50%);
  width: 60px; height: 4px; background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}
.section-header p { color: var(--gray); font-size: 1.05rem; max-width: 600px; margin: 20px auto 0; }

/* ===== CARDS GRID ===== */
.cards-grid { display: grid; gap: 24px; }
.cards-2 { grid-template-columns: repeat(2, 1fr); }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 992px) { .cards-4 { grid-template-columns: repeat(2, 1fr); } .cards-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 576px) { .cards-4, .cards-3, .cards-2 { grid-template-columns: 1fr; } }

.card {
  background: white; border-radius: 16px; overflow: hidden;
  box-shadow: 0 2px 15px rgba(0,0,0,0.06); transition: all var(--transition);
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.card-img { position: relative; overflow: hidden; height: 200px; }
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.card:hover .card-img img { transform: scale(1.08); }
.card-img .badge {
  position: absolute; top: 12px; left: 12px; background: var(--accent);
  color: white; padding: 4px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 600;
}
.card-body { padding: 20px; }
.card-body h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
.card-body p { color: #666; font-size: 0.9rem; line-height: 1.6; }
.card-body .card-link { display: inline-flex; align-items: center; gap: 6px; color: var(--primary); font-weight: 600; font-size: 0.9rem; margin-top: 12px; }
.card-body .card-link:hover { gap: 10px; }

/* ===== FEATURES ===== */
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
@media (max-width: 768px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .features-grid { grid-template-columns: 1fr; } }
.feature-item { text-align: center; padding: 30px 20px; }
.feature-icon {
  width: 70px; height: 70px; margin: 0 auto 20px; background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 20px; display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem; color: white; transition: transform var(--transition);
}
.feature-item:hover .feature-icon { transform: scale(1.1) rotate(5deg); }
.feature-item h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.feature-item p { color: #666; font-size: 0.9rem; }

/* ===== STATS ===== */
.stats-section { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); color: white; padding: 60px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; }
@media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
.stat-item .stat-num { font-size: 2.5rem; font-weight: 800; }
.stat-item .stat-label { font-size: 0.95rem; opacity: 0.85; margin-top: 4px; }

/* ===== IMAGE LIGHTBOX ===== */
.lightbox {
  position: fixed; inset: 0; background: rgba(0,0,0,0.92); z-index: 2000;
  display: none; align-items: center; justify-content: center; padding: 40px;
}
.lightbox.open { display: flex; }
.lightbox-img { max-width: 90%; max-height: 85vh; object-fit: contain; border-radius: 8px; }
.lightbox-close {
  position: absolute; top: 20px; right: 20px; width: 48px; height: 48px;
  background: rgba(255,255,255,0.15); border-radius: 50%; color: white;
  font-size: 1.5rem; display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.lightbox-close:hover { background: rgba(255,255,255,0.3); }
.lightbox-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 52px; height: 52px; background: rgba(255,255,255,0.15);
  border-radius: 50%; color: white; font-size: 1.3rem;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.lightbox-nav:hover { background: rgba(255,255,255,0.3); }
.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

/* ===== BREADCRUMB ===== */
.breadcrumb {
  background: var(--light); padding: 14px 0; margin-top: var(--nav-height);
  border-bottom: 1px solid #eee; font-size: 0.9rem;
}
.breadcrumb-list { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.breadcrumb-list a { color: var(--gray); transition: color var(--transition); }
.breadcrumb-list a:hover { color: var(--primary); }
.breadcrumb-list .sep { color: var(--gray); }
.breadcrumb-list .current { color: var(--primary); font-weight: 600; }

/* ===== PAGE HEADER ===== */
.page-header {
  position: relative; height: 40vh; min-height: 300px; display: flex; align-items: center; justify-content: center;
  background-size: cover; background-position: center; text-align: center; color: white;
}

.page-header::after { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(27,94,32,0.6), rgba(25,118,210,0.4)); }
.page-header-content { position: relative; z-index: 2; }
.page-header-content h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; margin-bottom: 12px; }
.page-header-content p { font-size: 1.1rem; opacity: 0.9; }

/* ===== PAGE CONTENT ===== */
.page-content { padding: 60px 0; }
.content-block { margin-bottom: 40px; }
.content-block h2 { font-size: 1.6rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 16px; padding-bottom: 10px; border-bottom: 2px solid var(--primary); display: inline-block; }
.content-block h3 { font-size: 1.3rem; font-weight: 600; color: var(--dark); margin: 24px 0 12px; }
.content-block p { margin-bottom: 16px; color: #555; line-height: 1.8; }
.content-block ul { margin: 12px 0; padding-left: 20px; }
.content-block ul li { margin-bottom: 8px; color: #555; }
.content-block ul li::marker { color: var(--primary); }
.content-image { margin: 20px 0; border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); cursor: pointer; }
.content-image img { width: 100%; height: auto; transition: transform 0.3s; }
.content-image:hover img { transform: scale(1.02); }

/* ===== SIDEBAR LAYOUT ===== */
.page-layout { display: grid; grid-template-columns: 280px 1fr; gap: 40px; }
@media (max-width: 992px) { .page-layout { grid-template-columns: 1fr; } }
.sidebar { position: sticky; top: 100px; align-self: start; }
.sidebar-menu { background: white; border-radius: 16px; box-shadow: var(--shadow); overflow: hidden; }
.sidebar-menu-title { background: var(--primary); color: white; padding: 16px 20px; font-weight: 700; font-size: 1.05rem; }
.sidebar-menu a { display: block; padding: 12px 20px; color: var(--dark); font-size: 0.95rem; transition: all var(--transition); border-bottom: 1px solid #f0f0f0; }
.sidebar-menu a:hover, .sidebar-menu a.active { background: rgba(46,125,50,0.06); color: var(--primary); padding-left: 28px; }

/* ===== NEWS LIST ===== */
.news-item { display: flex; gap: 20px; padding: 24px; background: white; border-radius: 12px; margin-bottom: 16px; box-shadow: 0 1px 8px rgba(0,0,0,0.04); transition: all var(--transition); }
.news-item:hover { box-shadow: var(--shadow); transform: translateX(5px); }
.news-date { min-width: 70px; text-align: center; background: var(--primary); color: white; border-radius: 10px; padding: 10px; }
.news-date .day { font-size: 1.6rem; font-weight: 800; line-height: 1; }
.news-date .month { font-size: 0.75rem; opacity: 0.8; }
.news-info h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; }
.news-info h3 a:hover { color: var(--primary); }
.news-info p { color: #666; font-size: 0.9rem; line-height: 1.6; }

/* ===== PAGINATION ===== */
.pagination { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 40px; }
.pagination a, .pagination span {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 40px; height: 40px; padding: 0 12px; border-radius: 10px;
  font-weight: 600; transition: all var(--transition);
}
.pagination a { background: white; color: var(--dark); box-shadow: 0 1px 4px rgba(0,0,0,0.06); }
.pagination a:hover { background: var(--primary); color: white; }
.pagination .current { background: var(--primary); color: white; }

/* ===== FORM ===== */
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-weight: 600; margin-bottom: 8px; font-size: 0.95rem; }
.form-control {
  width: 100%; padding: 14px 18px; border: 2px solid #e0e0e0; border-radius: 12px;
  font-size: 1rem; transition: all var(--transition); background: white;
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(46,125,50,0.1); }
textarea.form-control { min-height: 140px; resize: vertical; }

/* ===== FOOTER ===== */
.footer { background: var(--dark); color: rgba(255,255,255,0.8); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand .logo { color: white; margin-bottom: 16px; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; opacity: 0.8; }
.footer h4 { color: white; font-size: 1.05rem; font-weight: 700; margin-bottom: 20px; }
.footer-links a { display: block; padding: 6px 0; font-size: 0.9rem; opacity: 0.7; transition: all var(--transition); }
.footer-links a:hover { opacity: 1; color: var(--accent); padding-left: 8px; }
.footer-contact li { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; font-size: 0.9rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; margin-top: 40px; text-align: center; font-size: 0.85rem; opacity: 0.6; }

/* ===== BACK TO TOP ===== */
.back-top {
  position: fixed; bottom: 30px; right: 30px; width: 48px; height: 48px;
  background: var(--primary); color: white; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 15px rgba(46,125,50,0.4); z-index: 100;
  opacity: 0; visibility: hidden; transition: all var(--transition);
}
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { transform: translateY(-3px); background: var(--primary-dark); }

/* ===== TAB COMPONENT ===== */
.tabs { margin-bottom: 30px; }
.tab-buttons { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.tab-btn {
  padding: 10px 24px; border-radius: 50px; font-weight: 600; font-size: 0.95rem;
  color: #666; background: var(--light); transition: all var(--transition);
}
.tab-btn.active, .tab-btn:hover { background: var(--primary); color: white; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== TOAST ===== */
.toast {
  position: fixed; top: 100px; right: 20px; background: var(--primary); color: white;
  padding: 16px 24px; border-radius: 12px; box-shadow: var(--shadow-lg);
  z-index: 3000; transform: translateX(120%); transition: transform 0.4s cubic-bezier(0.4,0,0.2,1);
  font-weight: 500;
}
.toast.show { transform: translateX(0); }

/* ===== GALLERY ===== */
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 768px) { .gallery-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .gallery-grid { grid-template-columns: 1fr; } }
.gallery-item { border-radius: 12px; overflow: hidden; cursor: pointer; position: relative; }
.gallery-item img { width: 100%; height: 220px; object-fit: cover; transition: transform 0.5s; }
.gallery-item:hover img { transform: scale(1.1); }
.gallery-item::after {
  content: '🔍'; position: absolute; inset: 0; background: rgba(0,0,0,0.3);
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; opacity: 0; transition: opacity var(--transition);
}
.gallery-item:hover::after { opacity: 1; }

/* ===== TIMELINE ===== */
.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ''; position: absolute; left: 8px; top: 0; bottom: 0; width: 3px; background: var(--primary-light); border-radius: 2px; }
.timeline-item { position: relative; margin-bottom: 30px; }
.timeline-item::before {
  content: ''; position: absolute; left: -26px; top: 6px;
  width: 14px; height: 14px; background: var(--primary); border: 3px solid white;
  border-radius: 50%; box-shadow: 0 0 0 3px var(--primary-light);
}
.timeline-item h4 { font-size: 1.1rem; font-weight: 700; color: var(--primary-dark); }
.timeline-item .time { font-size: 0.85rem; color: var(--gray); margin-bottom: 4px; }
.timeline-item p { color: #555; margin-top: 6px; }

/* ===== INFO BOX ===== */
.info-box {
  background: linear-gradient(135deg, rgba(46,125,50,0.05), rgba(25,118,210,0.05));
  border-left: 4px solid var(--primary); border-radius: 0 12px 12px 0;
  padding: 20px 24px; margin: 24px 0;
}
.info-box h4 { color: var(--primary); font-weight: 700; margin-bottom: 8px; }
.info-box p { margin: 0; }

/* ===== DETAIL HIGHLIGHT ===== */
.highlight-card {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
  margin-bottom: 50px; padding: 30px; background: white; border-radius: 20px;
  box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}
@media (max-width: 768px) { .highlight-card { grid-template-columns: 1fr; } }
.highlight-card.reverse { direction: rtl; }
.highlight-card.reverse > * { direction: ltr; }
.highlight-card .hc-image { border-radius: 16px; overflow: hidden; }
.highlight-card .hc-image img { width: 100%; height: 300px; object-fit: cover; }
.highlight-card .hc-text h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 12px; color: var(--primary-dark); }
.highlight-card .hc-text p { color: #555; line-height: 1.8; margin-bottom: 12px; }
.tag-list { display: flex; gap: 8px; flex-wrap: wrap; }
.tag { background: var(--light); padding: 6px 14px; border-radius: 20px; font-size: 0.85rem; color: var(--primary); font-weight: 500; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--light); }
::-webkit-scrollbar-thumb { background: var(--gray); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }


/* ֻ�ľ��㴫˵Ϊ���У������˵���ȫ���� */
.nav-item:nth-child(3) 
> .dropdown > .dropdown-item:nth-child(3) 
> .dropdown {
    width: 420px; /* �����ܿ��� */
    columns: 2; /* �Զ������� */
    column-gap: 0; /* �� */
    padding: 8px 0;
}

/* ������ÿ����Ŀռ�����У�������� */
.nav-item:nth-child(3) 
> .dropdown > .dropdown-item:nth-child(3) 
> .dropdown > .dropdown-item {
    break-inside: avoid;
    width: 100%;
}

/* �����Ӳ˵��������ҵ��������κ����� */
.dropdown .dropdown {
    position: absolute;
    top: 0;
    left: 100%;
    z-index: 999999;
    overflow: visible !important;
}

/* �������̶��ö� */
.header {
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 9999999;
}