/* 全局a标签去除下划线 */
a { text-decoration: none !important; }
a:hover { text-decoration: none !important; }

:root {
  --bg: #FAFAF7; --bg2: #FFFFFF; --ink: #1A2E1A; --muted: #5C6B5C;
  --rule: #E0E5E0; --accent: #2D7A4F; --accent-light: rgba(45, 122, 79, 0.08);
  --accent2: #D4A04C; --accent2-light: rgba(212, 160, 76, 0.1);
  --radius: 16px; --radius-sm: 10px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans CJK SC', 'WenQuanYi Micro Hei', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg); color: var(--ink); line-height: 1.8; font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }

/* 导航 */
.top-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: #ffffff;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
  transition: box-shadow 0.3s ease;
}
.top-navbar.scrolled {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}
.top-navbar-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.25rem;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.top-navbar-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.top-navbar-logo img {
  height: 58px;
  width: auto;
  display: block;
}
.top-navbar-menu {
  display: flex;
  gap: 2rem;
  list-style: none;
}
.top-navbar-menu a {
  font-size: 0.95rem;
  color: var(--ink);
  text-decoration: none;
  transition: color 0.2s;
  position: relative;
}
.top-navbar-menu a:hover {
  color: var(--accent);
}
.top-navbar-menu a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.2s;
}
.top-navbar-menu a:hover::after,
.top-navbar-menu a.active::after {
  width: 100%;
}
.top-navbar-menu a.active {
  color: var(--accent);
  font-weight: 600;
}
.top-navbar-cta {
  background: var(--accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 1.1rem;
  border-radius: 50px;
  text-decoration: none;
  transition: background 0.2s;
}
.top-navbar-cta:hover {
  background: #256a43;
}
.top-navbar-phone {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.93rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  margin-right: 0.75rem;
}
.top-navbar-phone:hover {
  color: var(--accent);
}
.top-navbar-phone-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}
.top-navbar-right {
  display: flex;
  align-items: center;
}
@media (max-width: 768px) {
  .top-navbar-menu {
    display: none;
  }
  .top-navbar-menu.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: #fff;
    padding: 1rem 1.25rem;
    gap: 0;
    border-bottom: 1px solid var(--rule);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  }
  .top-navbar-menu.mobile-open li {
    border-bottom: 1px solid var(--rule);
  }
  .top-navbar-menu.mobile-open li:last-child {
    border-bottom: none;
  }
  .top-navbar-menu.mobile-open a {
    display: block;
    padding: 0.85rem 0;
    font-size: 0.95rem;
  }
  .top-navbar-menu.mobile-open a::after {
    display: none;
  }
  .top-navbar-menu a {
    font-size: 0.85rem;
  }
  .top-navbar-cta {
    display: none;
  }
  .top-navbar-phone {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.4rem;
    color: var(--ink);
  }
}
@media (min-width: 769px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* 页面头部 */
.page-header {
  background: linear-gradient(135deg, rgba(26, 74, 46, 0.85) 0%, rgba(45, 122, 79, 0.75) 100%),
              url('/images/field-classroom.jpg') center/cover no-repeat;
  color: #fff; padding: calc(76px + 4rem) 1.25rem 4rem; text-align: center;
  position: relative;
}
.page-header h1 { font-size: 2rem; margin-bottom: 0.5rem; }
.page-header p { opacity: 0.85; font-size: 1rem; }
.breadcrumb {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.8);
  margin-top: 0.75rem;
}
.breadcrumb a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  transition: color 0.2s;
}
.breadcrumb a:hover {
  color: #fff;
}
.breadcrumb .sep {
  opacity: 0.5;
}
.breadcrumb .current {
  color: #fff;
  font-weight: 500;
}

.container { max-width: 800px; margin: 0 auto; padding: 0 1.25rem; }
.section { padding: 3rem 0; }
.section-title { font-size: 1.6rem; text-align: center; margin-bottom: 0.5rem; }
.section-divider { width: 48px; height: 3px; background: var(--accent); border-radius: 2px; margin: 0.75rem auto 2rem; }

/* FAQ分类 */
.faq-category { margin-bottom: 2.5rem; }
.faq-category h3 {
  font-size: 1.2rem; color: var(--accent); margin-bottom: 1rem;
  padding-bottom: 0.5rem; border-bottom: 2px solid var(--accent-light);
}

/* FAQ项目 */
.faq-item {
  background: var(--bg2); border-radius: var(--radius-sm);
  margin-bottom: 0.75rem; border: 1px solid var(--rule);
  overflow: hidden;
}
.faq-q {
  font-size: 1rem; font-weight: 600; color: var(--ink);
  padding: 1.25rem 1.5rem; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  list-style: none;
}
.faq-q::-webkit-details-marker { display: none; }
.faq-q::after {
  content: '+'; font-size: 1.4rem; color: var(--accent);
  font-weight: 400; transition: transform 0.2s;
}
.faq-item[open] .faq-q::after { transform: rotate(45deg); }
.faq-a {
  padding: 0 1.5rem 1.25rem; font-size: 0.95rem;
  color: var(--muted); line-height: 1.9;
}
.faq-a p { margin-bottom: 0.75rem; }
.faq-a strong { color: var(--accent2); }

/* 快速导航 */
.quick-nav {
  background: var(--bg2); border-radius: var(--radius);
  padding: 1.5rem; border: 1px solid var(--rule);
  margin-bottom: 2rem;
}
.quick-nav h4 { font-size: 1rem; margin-bottom: 0.75rem; color: var(--ink); }
.quick-nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.quick-nav a {
  display: inline-block; padding: 0.3rem 0.8rem;
  background: var(--accent-light); color: var(--accent);
  border-radius: 50px; font-size: 0.85rem;
}

/* CTA */
.cta-section {
  background: linear-gradient(135deg, var(--accent), #1a5a35);
  text-align: center; padding: 3rem 1.25rem;
}
.cta-section h2 { color: #fff; font-size: 1.6rem; margin-bottom: 1rem; }
.cta-section p { color: rgba(255,255,255,0.85); font-size: 0.95rem; margin-bottom: 1.5rem; }
.cta-btn {
  display: inline-block; background: #fff; color: var(--accent);
  font-size: 1rem; font-weight: 700; padding: 0.85rem 2.5rem;
  border-radius: 50px; text-decoration: none;
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

/* 页脚 */
footer {
  background: var(--ink); color: rgba(255,255,255,0.5);
  text-align: center; padding: 2rem 1.25rem; font-size: 0.8rem; line-height: 1.7;
}
footer strong { color: rgba(255,255,255,0.8); }
footer a { color: rgba(255,255,255,0.6); margin: 0 0.5rem; }

@media (max-width: 768px) {
  .page-header h1 { font-size: 1.5rem; }
  .section { padding: 2rem 0; }
  .section-title { font-size: 1.3rem; }
  .faq-q { padding: 1rem 1.25rem; font-size: 0.95rem; }
  .faq-a { padding: 0 1.25rem 1rem; }
}