/* ============================================================
   本地相机 · 帮助中心样式
   依赖：../../css/index.css（提供 header/nav/footer/back-to-top 基础主题）
   本文件仅补充帮助中心专属组件 + 头部透明覆盖（与主站一致）
   ============================================================ */

/* camera 作用域主题色覆盖：品牌主色 #2BA8F0
   仅作用于帮助页，不改动共享 css，避免影响 medicine 站 */
:root{
  --primary-color:#2BA8F0;
  --primary-dark:#1a8fd0;
}

/* 头部透明覆盖（与主站 index.html 内联样式一致，保证蓝色 hero 上白字） */
.header{position:fixed;top:0;left:0;width:100%;background-color:transparent;box-shadow:none;z-index:1000;transition:var(--transition)}
.header.scrolled{background:rgba(255,255,255,.98);box-shadow:0 2px 20px rgba(0,0,0,.1)}
.header .logo-text{color:#fff!important}
.header.scrolled .logo-text{color:#333!important}
.header .nav-link{color:#fff!important}
.header.scrolled .nav-link{color:#333!important}
.header .mobile-menu-btn{color:#fff}
.header.scrolled .mobile-menu-btn{color:#333!important}
.header .logo-image{filter:brightness(0) invert(1)}
.header.scrolled .logo-image{filter:none}

/* Hero */
.help-hero{
  background:linear-gradient(135deg,#9DE8FD 0%,#5BC5F5 50%,#2BA8F0 100%);
  color:#fff;padding:140px 0 70px;text-align:center;position:relative;overflow:hidden;
}
.help-hero h1{font-size:var(--font-size-3xl);font-weight:700;margin-bottom:12px}
.help-hero p{font-size:var(--font-size-lg);opacity:.92;max-width:640px;margin:0 auto}
.help-search{margin:30px auto 0;max-width:560px;position:relative}
.help-search input{
  width:100%;padding:14px 18px 14px 46px;font-size:16px;border:none;border-radius:30px;
  box-shadow:0 8px 24px rgba(0,0,0,.15);outline:none;color:var(--text-color);
}
.help-search input::placeholder{color:#9aa6ad}
.help-search .search-icon{position:absolute;left:18px;top:50%;transform:translateY(-50%);color:#2BA8F0;width:18px;height:18px;display:flex;align-items:center}
.help-search .search-icon svg{width:18px;height:18px;display:block}

/* Breadcrumb */
.breadcrumb{padding:22px 0 0;font-size:14px;color:var(--text-lighter)}
.breadcrumb a{color:var(--primary-color);text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb .sep{margin:0 8px;color:var(--medium-gray)}

/* Article layout */
.help-main{padding:18px 0 64px}
.help-container{max-width:860px;margin:0 auto}
.help-breadcrumb-wrap{max-width:860px;margin:0 auto}
.article-title{font-size:var(--font-size-2xl);font-weight:700;color:var(--dark-gray);margin-bottom:6px;line-height:1.3}
.article-meta{color:var(--text-lighter);font-size:14px;margin-bottom:28px}
.article-content h2{font-size:22px;font-weight:600;color:var(--dark-gray);margin:30px 0 12px}
.article-content h3{font-size:18px;font-weight:600;color:var(--dark-gray);margin:22px 0 8px}
.article-content p{margin-bottom:14px;color:var(--text-light);line-height:1.8}
.article-content ul,.article-content ol{margin:0 0 16px 22px;color:var(--text-light);line-height:1.8}
.article-content li{margin-bottom:8px}
.article-content strong{color:var(--text-color)}

/* 直给结论框（GEO 友好：开头即答案） */
.answer-lead{
  background:linear-gradient(135deg,rgba(43,168,240,.12),rgba(43,168,240,.05));
  border-left:4px solid var(--primary-color);
  padding:18px 22px;border-radius:0 12px 12px 0;margin:0 0 26px;
}
.answer-lead p{margin:0;color:var(--text-color);font-weight:500;line-height:1.7}

/* Hub 分类 */
.help-section{padding:6px 0 30px}
.help-section-title{
  font-size:var(--font-size-xl);font-weight:700;color:var(--dark-gray);
  margin:28px 0 16px;display:flex;align-items:center;gap:10px;
}
.help-section-title .bar{width:5px;height:22px;background:var(--primary-color);border-radius:3px;display:inline-block}
.help-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.help-card--full{grid-column:1/-1}
.help-card{
  display:flex;align-items:center;gap:16px;
  background:#fff;border:1px solid var(--border-color);border-radius:14px;padding:18px 22px;
  text-decoration:none;transition:transform .25s,box-shadow .25s,border-color .25s;
}
.help-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--primary-color)}
.help-card .c-icon{
  flex-shrink:0;width:46px;height:46px;border-radius:12px;

  display:flex;align-items:center;justify-content:center;font-size:24px;
}
.help-card .c-body{flex:1;min-width:0}
.help-card h3{font-size:16px;font-weight:600;color:var(--dark-gray);margin:0 0 4px;line-height:1.4}
.help-card p{font-size:13px;color:var(--text-light);line-height:1.5;margin:0}

/* 相关帮助 */
.related-box{margin-top:46px;padding-top:26px;border-top:1px solid var(--border-color)}
.related-box h3{font-size:18px;font-weight:600;color:var(--dark-gray);margin-bottom:14px}
.related-list{list-style:none;display:grid;gap:10px;padding:0}
.related-list a{
  display:flex;align-items:center;gap:8px;color:var(--primary-color);text-decoration:none;
  font-size:15px;padding:11px 14px;background:var(--light-gray);border-radius:10px;transition:background .2s;
}
.related-list a:hover{background:#e8f1fd}
.related-list a::before{content:'📄';font-size:14px}

/* 返回 */
.help-back{margin-top:30px}
.help-back a{color:var(--primary-color);text-decoration:none;font-size:14px}
.help-back a:hover{text-decoration:underline}

.hidden{display:none!important}

@media(max-width:768px){
  .help-hero{padding:108px 0 48px}
  .help-hero h1{font-size:28px}
  .help-grid{grid-template-columns:1fr}
  .help-card--full{grid-column:auto}
  .article-title{font-size:24px}
}

/* 对比表格 */
.compare-table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.compare-table th,.compare-table td{border:1px solid #e8edf0;padding:12px 14px;text-align:left;vertical-align:top;line-height:1.6}
.compare-table thead th{background:#2BA8F0;color:#fff;font-weight:600}
.compare-table tbody tr:nth-child(even){background:#f7fafb}
.compare-table td:first-child{font-weight:600;color:#2c3e50;white-space:nowrap}
@media(max-width:600px){
  .compare-table{display:block;overflow-x:auto;white-space:nowrap}
}