/* 台青家园 / 台胞帮扶 / 后台统一视觉（移动优先）
   依赖 xining.css 的 :root 变量；独立文件便于回滚与版本控制。 */

/* ---------- 频道 hero ---------- */
.youth-hero {
  background: linear-gradient(135deg, var(--xn-brand-dark) 0%, var(--xn-brand) 58%, #2b7fb5 100%);
  color: #fff; position: relative; overflow: hidden;
}
.youth-hero::after {
  content: ''; position: absolute; right: -80px; bottom: -120px; width: 320px; height: 320px;
  border-radius: 50%; background: rgba(255, 255, 255, .07); pointer-events: none;
}
.youth-hero .wrap { position: relative; z-index: 1; }
.youth-hero h1 { color: #fff; font-size: clamp(24px, 5.4vw, 38px); line-height: 1.32; letter-spacing: .3px; }
.youth-hero .lead { color: rgba(255, 255, 255, .92); font-size: 15px; line-height: 1.85; max-width: 68ch; }
.youth-hero .cta-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
.youth-hero .btn { border-radius: 999px; padding: 12px 20px; }
/* Hero 是深蓝底：主按钮反白、次按钮透明描边。
   main.css 的 .btn-outline 是白底，若不覆盖 background 会变成白底白字。 */
.youth-hero .btn-primary { background: #fff; color: var(--xn-brand); border: 1px solid #fff; font-weight: 700; }
.youth-hero .btn-primary:hover { background: rgba(255, 255, 255, .9); color: var(--xn-brand-dark); }
.youth-hero .btn-outline { background: transparent; border-color: rgba(255, 255, 255, .65); color: #fff; }
.youth-hero .btn-outline:hover { background: rgba(255, 255, 255, .14); color: #fff; }

/* ---------- 频道内导航 ---------- */
.youth-nav { margin: 0 0 20px; gap: 8px; }
.youth-nav .chip {
  display: inline-flex; align-items: center; min-height: 40px; padding: 8px 14px;
  border: 1px solid var(--xn-line); border-radius: 999px; background: #fff;
  color: var(--xn-sub); font-size: 14px; white-space: nowrap; text-decoration: none;
}
.youth-nav .chip.active { background: var(--xn-brand); border-color: var(--xn-brand); color: #fff; font-weight: 600; }
.youth-nav .chip:active { transform: scale(.98); }

/* ---------- 大入口卡 ---------- */
.youth-entry { display: block; text-decoration: none; color: inherit; position: relative; padding: 20px; transition: box-shadow .18s ease, transform .18s ease; }
.youth-entry:hover { box-shadow: 0 10px 30px rgba(13, 92, 143, .14); transform: translateY(-2px); }
.youth-entry h3 { margin: 10px 0 8px; font-size: 19px; }
.youth-entry .meta { font-size: 14px; line-height: 1.8; white-space: pre-line; }
.youth-entry-ico {
  display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px;
  border-radius: 12px; background: var(--xn-brand-soft); color: var(--xn-brand); font-size: 22px;
}
.youth-entry-go { display: inline-block; margin-top: 12px; color: var(--xn-brand); font-weight: 600; font-size: 14px; }

/* ---------- 后台统一框架 ---------- */
.admin-shell { background: #fff; border-bottom: 1px solid var(--xn-line); padding: 10px 0 12px; }
.admin-shell .wrap, .admin-shell > * { max-width: 1120px; margin-left: auto; margin-right: auto; }
.admin-top { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding: 6px 16px 8px; }
.admin-top strong { font-size: 16px; }
.admin-top-sub { color: var(--xn-sub); font-size: 12.5px; }
.admin-site-link { margin-left: auto; font-size: 13px; }
.admin-group { display: flex; align-items: flex-start; gap: 10px; padding: 5px 16px; }
.admin-group-label { flex: 0 0 76px; color: var(--xn-sub); font-size: 12px; padding-top: 10px; }
.admin-chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; }
.admin-chips .chip {
  display: inline-flex; align-items: center; min-height: 34px; padding: 5px 12px;
  border-radius: 8px; background: var(--xn-bg); color: var(--xn-ink);
  font-size: 13px; text-decoration: none; border: 1px solid transparent;
}
.admin-chips .chip.active { background: var(--xn-brand); color: #fff; font-weight: 600; }
.admin-chips .chip:hover { border-color: var(--xn-brand); }
.kpi-num { font-size: 28px; font-weight: 700; color: var(--xn-brand); margin: 6px 0 2px; line-height: 1.1; }
.kpi-card h3, .admin-mod h3 { font-size: 14px; }
.kpi-alert { border-left: 3px solid var(--xn-accent); }
.sec-sub { font-size: 15px; font-weight: 600; margin: 20px 0 10px; color: var(--xn-ink); }
.detail-list dt { font-weight: 600; margin-top: 8px; }
.detail-list dd { font-size: 14px; line-height: 1.75; }
.pill.active { background: var(--xn-brand-soft); color: var(--xn-brand); border-color: var(--xn-brand-soft); }

/* ---------- 表单可用性（全站补强，移动优先） ---------- */
.fld { margin-bottom: 12px; }
.fld label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; color: var(--xn-ink); }
.fld input, .fld select, .fld textarea {
  display: block; width: 100%; box-sizing: border-box; padding: 10px 12px;
  border: 1px solid var(--xn-line); border-radius: 10px; background: #fff;
  color: var(--xn-ink); font: inherit; font-size: 16px; line-height: 1.5;
  -webkit-appearance: none; appearance: none;
}
.fld textarea { resize: vertical; min-height: 88px; }
.fld select { background-image: linear-gradient(45deg, transparent 50%, var(--xn-sub) 50%), linear-gradient(135deg, var(--xn-sub) 50%, transparent 50%); background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 34px; }
.fld input:focus, .fld select:focus, .fld textarea:focus { outline: 2px solid var(--xn-brand); outline-offset: 1px; border-color: var(--xn-brand); }
.consent-box { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; line-height: 1.7; margin: 12px 0; }
.consent-box input { width: 18px; height: 18px; flex: 0 0 18px; margin-top: 3px; accent-color: var(--xn-brand); }
.form-ok { background: #eaf6ee; border: 1px solid #bfe3ca; color: #14532d; padding: 14px 16px; border-radius: 12px; line-height: 1.8; margin-bottom: 12px; }
.form-error { background: #fdf0ef; border: 1px solid #f0c4bf; color: #9b2c20; padding: 12px 14px; border-radius: 10px; }
.form-ok code, .card code { background: rgba(13, 92, 143, .08); padding: 2px 6px; border-radius: 5px; font-size: 13px; word-break: break-all; }

/* ---------- 移动端：90% 使用者 ---------- */
@media (max-width: 639px) {
  .youth-hero { padding: 26px 0 28px; }
  .youth-hero .lead { font-size: 14.5px; line-height: 1.8; }
  .youth-hero .cta-row .btn { flex: 1 1 auto; min-height: 44px; justify-content: center; }
  .youth-nav { margin: 0 -16px 18px; padding: 0 16px 6px; flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .youth-nav::-webkit-scrollbar { display: none; }
  .youth-nav .chip { min-height: 42px; padding: 8px 15px; }
  .youth-entry { padding: 16px; }
  .youth-entry h3 { font-size: 17px; }
  .admin-top { padding: 6px 14px 8px; }
  .admin-group { padding: 4px 14px; flex-direction: column; gap: 4px; }
  .admin-group-label { flex: none; padding-top: 0; }
  .admin-chips .chip { min-height: 38px; padding: 7px 13px; font-size: 13.5px; }
  .kpi-num { font-size: 24px; }
  .btn, button.btn { min-height: 44px; }
  .btn-sm { min-height: 40px; }
  .card .meta { font-size: 13.5px; line-height: 1.75; }
  .notice { font-size: 13.5px; line-height: 1.8; }
  .form-ok, .form-error { font-size: 14px; }
}

/* ---------- 手机端零 JS 频道抽屉 ----------
   xining.css 在 <=639px 把 nav.main 整个隐藏，导致全部频道只剩底部 5 个 tab。
   这里用原生 <details> 补回可达性：零脚本、CSP 友好、44px 触控目标。 */
.mobile-nav { display: none; }
@media (max-width: 639px) {
  .mobile-nav { display: block; position: relative; margin: 0 0 10px; }
  .mobile-nav > summary {
    list-style: none; cursor: pointer; -webkit-tap-highlight-color: transparent;
    display: flex; align-items: center; justify-content: space-between;
    min-height: 42px; padding: 8px 14px; box-sizing: border-box;
    border: 1px solid var(--xn-line); border-radius: 10px;
    background: #fff; color: var(--xn-ink); font-size: 13.5px; font-weight: 600;
  }
  .mobile-nav > summary::-webkit-details-marker { display: none; }
  .mobile-nav > summary::marker { content: ''; }
  .mobile-nav-ico { font-size: 17px; line-height: 1; color: var(--xn-brand); }
  .mobile-nav[open] > summary { border-color: var(--xn-brand); background: var(--xn-brand-soft); }
  .mobile-nav-grid {
    position: absolute; left: 0; right: 0; top: calc(100% + 6px); z-index: 80;
    display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px;
    padding: 10px; box-sizing: border-box;
    background: #fff; border: 1px solid var(--xn-line); border-radius: 12px;
    box-shadow: 0 16px 36px rgba(16, 33, 46, .18);
    max-height: min(62vh, 430px); overflow-y: auto;
  }
  .mobile-nav-grid a {
    display: flex; align-items: center; justify-content: center; text-align: center;
    min-height: 44px; padding: 6px 4px; box-sizing: border-box;
    border-radius: 8px; background: var(--xn-bg); color: var(--xn-ink);
    font-size: 13px; line-height: 1.35; text-decoration: none;
  }
  .mobile-nav-grid a.on { background: var(--xn-brand); color: #fff; font-weight: 600; }
  .mobile-nav-grid a:active { background: var(--xn-brand-soft); color: var(--xn-brand); }
}
@media (max-width: 359px) {
  .mobile-nav-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- 配图：统一 16:9、防 CLS、AI 示意图显著标识 ---------- */
.figure img.photo-16x9 { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.youth-figure { margin: 22px 0 0; }
.youth-figure .section-photo { box-shadow: none; border-radius: 14px; }
.hero-photo-note { margin: 8px 2px 0; font-size: 12px; color: var(--xn-sub); line-height: 1.6; }

.duo-fig { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 16px; }
.duo-card {
  display: block; overflow: hidden; text-decoration: none; color: inherit;
  background: #fff; border: 1px solid var(--xn-line); border-radius: 14px;
  box-shadow: var(--xn-shadow); transition: transform .18s ease, box-shadow .18s ease;
}
.duo-card:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(13, 92, 143, .16); }
.duo-img { position: relative; display: block; overflow: hidden; background: var(--xn-bg); }
.duo-img img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.ai-credit {
  position: absolute; right: 10px; bottom: 10px; z-index: 2;
  background: rgba(8, 26, 40, .55); color: #fff; font-size: 11px; line-height: 1;
  padding: 5px 9px; border-radius: 7px; backdrop-filter: blur(4px);
}
.duo-txt { padding: 13px 15px 16px; }
.duo-txt h3 { margin: 0 0 5px; font-size: 16px; color: var(--xn-ink); }
.duo-txt p { margin: 0; font-size: 13px; line-height: 1.7; color: var(--xn-sub); }
.duo-go { display: inline-block; margin-top: 9px; font-size: 13px; font-weight: 600; color: var(--xn-brand); }

/* ---------- 底部 tab：突出台青家园 / 台胞帮扶 ---------- */
.xn-tabbar a { min-height: 44px; padding: 3px 0; }
.xn-tabbar a.feat svg { stroke: var(--xn-brand); }

@media (max-width: 639px) {
  .duo-fig { grid-template-columns: 1fr; gap: 12px; }
  .duo-txt { padding: 12px 14px 14px; }
  .duo-txt h3 { font-size: 15.5px; }
  .youth-figure { margin: 16px 0 0; }
  .youth-figure .section-photo { border-radius: 12px; }
}