:root {
  --primary: #0f4c75;
  --accent: #1e6fa8;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, "Microsoft YaHei", sans-serif; color: #333; line-height: 1.8; background: #f9fafb; }
.navbar { background: #fff; border-bottom: 1px solid #e5e7eb; position: sticky; top: 0; z-index: 100; }
.nav-container { max-width: 1100px; margin: 0 auto; padding: 12px 20px; display: flex; justify-content: space-between; align-items: center; }
.navbar .logo { font-size: 18px; font-weight: bold; color: var(--primary); text-decoration: none; }
.nav-links a { margin-left: 18px; color: #555; text-decoration: none; font-size: 15px; }
.nav-links a:hover { color: var(--accent); }
.nav-stage { font-weight: 500; }
/* 导航栏"全部专业"下拉菜单（stages>5时启用，如工程师28专业） */
.nav-dropdown { position: relative; display: inline-block; }
.nav-dropdown-toggle { margin-left: 18px; color: #555; text-decoration: none; font-size: 15px; cursor: pointer; user-select: none; }
.nav-dropdown-toggle:hover { color: var(--accent); }
.nav-dropdown-menu { display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%); background: #fff; border: 1px solid #e5e7eb; border-radius: 10px; box-shadow: 0 8px 24px rgba(0,0,0,0.12); padding: 14px 16px; grid-template-columns: repeat(3, minmax(130px, 1fr)); gap: 4px 18px; width: max-content; max-width: 560px; z-index: 200; }
.nav-dropdown:hover .nav-dropdown-menu { display: grid; }
.nav-stage-item { color: #555; text-decoration: none; font-size: 14px; padding: 6px 4px; white-space: nowrap; border-radius: 6px; }
.nav-stage-item:hover { color: var(--accent); background: #f0f7ff; }
@media (max-width: 768px) { .nav-dropdown-menu { grid-template-columns: repeat(2, minmax(110px, 1fr)); left: 0; transform: none; max-width: 320px; } }
.hero { background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; padding: 50px 20px; text-align: center; }
.hero h1 { font-size: 30px; margin-bottom: 12px; }
.hero p { font-size: 16px; opacity: 0.95; }
.container { max-width: 1100px; margin: 0 auto; padding: 30px 20px; }
.stages-nav { text-align: center; margin: 30px 0 40px; }
.stages-nav h2 { color: var(--primary); margin-bottom: 20px; font-size: 22px; }
.stages-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; max-width: 900px; margin: 0 auto; }
.stage-item { display: flex; flex-direction: column; align-items: center; padding: 28px 20px; background: #fff; border-radius: 14px; text-decoration: none; color: #333; box-shadow: 0 2px 8px rgba(0,0,0,0.08); transition: all 0.2s; border: 2px solid transparent; }
.stage-item:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(0,0,0,0.12); border-color: var(--accent); }
.stage-icon { font-size: 36px; margin-bottom: 10px; }
.stage-name { font-size: 20px; font-weight: bold; color: var(--primary); margin-bottom: 6px; }
.stage-desc { font-size: 13px; color: #666; }
.stage-count { font-size: 12px; color: var(--accent); margin-top: 8px; }
.stage-switcher { display: flex; gap: 10px; margin: 20px 0; flex-wrap: wrap; }
.stage-switcher a { padding: 8px 18px; border-radius: 8px; background: #f0f0f0; text-decoration: none; color: #555; font-size: 14px; transition: all 0.2s; }
.stage-switcher a:hover { background: var(--accent); color: #fff; }
.stage-switcher a.active { background: var(--primary); color: #fff; }
.nav-stage { font-weight: 500; }
.card-stage { font-size: 11px; color: #fff; background: var(--accent); padding: 2px 8px; border-radius: 4px; margin-bottom: 6px; align-self: flex-start; }
.rings-nav { text-align: center; margin-bottom: 40px; }
.rings-nav h2 { color: var(--primary); margin-bottom: 20px; font-size: 22px; }
.rings-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.ring-item { display: flex; flex-direction: column; align-items: center; padding: 16px 20px; background: #fff; border-radius: 10px; text-decoration: none; color: #555; box-shadow: 0 1px 3px rgba(0,0,0,0.08); transition: all 0.2s; min-width: 90px; }
.ring-item:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.12); color: var(--primary); }
.ring-icon { font-size: 24px; margin-bottom: 6px; }
.ring-name { font-size: 13px; }
.cat-section { background: #fff; border-radius: 12px; padding: 24px; margin-bottom: 24px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.cat-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; border-bottom: 2px solid var(--accent); padding-bottom: 10px; }
.cat-header h2 { font-size: 20px; color: var(--primary); }
.view-all { color: var(--accent); text-decoration: none; font-size: 14px; }
.post-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.region-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; margin-top: 20px; }
.region-item { display: flex; flex-direction: column; align-items: center; padding: 16px 12px; background: #fff; border-radius: 8px; text-decoration: none; color: #333; box-shadow: 0 1px 3px rgba(0,0,0,0.06); transition: all 0.2s; }
.region-item:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.1); color: var(--primary); }
.region-name { font-size: 15px; font-weight: 500; }
.region-count { font-size: 12px; color: var(--accent); margin-top: 4px; }
.region-count.region-empty { color: #aaa; }
.page-title { font-size: 26px; color: var(--primary); margin-bottom: 8px; }
.page-desc { color: #666; font-size: 15px; line-height: 1.7; }
.hero-cta { background: rgba(255,255,255,.2); display: inline-block; padding: 8px 20px; border-radius: 6px; margin-top: 10px; font-weight: bold; }
.hero-qr { width: 140px; height: 140px; border-radius: 8px; border: 3px solid #fff; margin-top: 15px; }
.wx-cta-box { text-align: center; margin-top: 32px; padding: 24px; background: #fff; border-radius: 12px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.wx-cta-box .wx-id { font-size: 16px; color: var(--primary); margin-bottom: 10px; font-weight: 500; }
.wx-cta-box .wx-qr { width: 180px; height: 180px; }
.post-card { display: flex; flex-direction: column; padding: 14px; background: #f9fafb; border-radius: 8px; text-decoration: none; color: #333; border-left: 3px solid var(--accent); transition: all 0.2s; }
.post-card:hover { background: #eff6ff; transform: translateX(2px); }
.card-prov, .card-cat { font-size: 12px; color: var(--accent); margin-bottom: 6px; }
.card-title { font-size: 15px; line-height: 1.5; }
.post-article { background: #fff; border-radius: 12px; padding: 40px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.post-article h1 { font-size: 26px; color: #1a1a1a; margin-bottom: 12px; line-height: 1.4; }
.post-meta { color: #888; font-size: 14px; margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid #eee; }
.post-meta span { margin-right: 16px; }
.post-article h2 { font-size: 20px; color: var(--primary); margin: 28px 0 14px; padding-bottom: 8px; border-bottom: 2px solid var(--accent); }
.post-article h3 { font-size: 17px; color: #333; margin: 22px 0 10px; }
.post-article p { margin-bottom: 16px; color: #444; }
.post-article strong { color: var(--primary); }
.post-article ul, .post-article ol { margin: 0 0 16px 24px; }
.post-article li { margin-bottom: 6px; }
.post-article blockquote { border-left: 4px solid var(--accent); background: #eff6ff; padding: 12px 16px; margin: 16px 0; color: #555; }
.data-table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.data-table th, .data-table td { border: 1px solid #ddd; padding: 10px; text-align: left; }
.data-table th { background: #f3f4f6; }
.author-box { background: #fff; border-radius: 12px; padding: 28px; margin-top: 30px; text-align: center; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.author-box h3 { color: var(--primary); margin-bottom: 12px; }
.author-box p { color: #555; margin-bottom: 10px; }
.wx-cta { margin-top: 16px; }
.wx-qr { width: 180px; margin-top: 8px; }
.wx-id { color: var(--accent); font-weight: bold; }
.footer { background: #1f2937; color: #aaa; text-align: center; padding: 24px 20px; margin-top: 40px; }
.footer a { color: #aaa; }
.footer-company { font-size: 13px; }
.icp { font-size: 13px; }
@media (max-width: 600px) {
  .nav-links a { margin-left: 10px; font-size: 13px; }
  .hero h1 { font-size: 24px; }
  .post-article { padding: 20px; }
}