/* ========================================
   Help Center - 公共样式（主题色继承 common.css 的 --brand）
======================================== */

.hc-wrap{padding:40px 0 80px}
.hc-container{
  display:grid;grid-template-columns:260px 1fr;gap:44px;
  max-width:var(--container);margin:0 auto;padding:0 24px;
}
@media (max-width: 960px){
  .hc-container{grid-template-columns:1fr;gap:28px}
}

/* ---------- 头部搜索区 ---------- */
.hc-hero{
  padding:64px 0 48px;
  background:
    radial-gradient(600px 300px at 85% -10%, var(--brand-50), transparent 60%),
    linear-gradient(180deg,#ffffff 0%, var(--brand-50) 100%);
  border-bottom:1px solid var(--line);
}
.hc-hero-inner{max-width:var(--container);margin:0 auto;padding:0 24px;text-align:center}
.hc-hero .eyebrow{
  display:inline-block;padding:5px 14px;border-radius:999px;
  background:#fff;border:1px solid var(--brand-100);color:var(--brand-dark);
  font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;
}
.hc-hero h1{
  margin:14px 0 14px;font-size:clamp(28px,3vw,40px);font-weight:800;
  color:var(--ink-900);line-height:1.25;
}
.hc-hero p{color:var(--ink-500);font-size:16px;line-height:1.8;max-width:640px;margin:0 auto}
.hc-search{
  margin:28px auto 0;max-width:620px;position:relative;
}
.hc-search input{
  width:100%;padding:16px 18px 16px 50px;border-radius:14px;
  border:1px solid var(--line);background:#fff;
  font-size:15px;color:var(--ink-900);
  box-shadow:var(--shadow-sm);transition:all .25s ease;
}
.hc-search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-50)}
.hc-search svg{
  position:absolute;left:18px;top:50%;transform:translateY(-50%);
  width:18px;height:18px;color:var(--ink-500);pointer-events:none;
}

/* ---------- 侧栏分类导航 ---------- */
.hc-sidebar{
  position:sticky;top:100px;align-self:start;
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:14px;box-shadow:var(--shadow-sm);
}
.hc-sidebar h3{
  font-size:12px;font-weight:700;color:var(--ink-500);
  letter-spacing:1.2px;text-transform:uppercase;
  padding:8px 12px 10px;
}
.hc-sidebar a{
  display:flex;align-items:center;gap:10px;
  padding:10px 12px;border-radius:10px;
  font-size:14px;font-weight:500;color:var(--ink-700);
  transition:all .2s ease;
}
.hc-sidebar a:hover{background:var(--brand-50);color:var(--brand-dark)}
.hc-sidebar a.active{background:var(--brand-50);color:var(--brand-dark);font-weight:700}
.hc-sidebar a svg{width:16px;height:16px;flex-shrink:0}
.hc-sidebar .count{
  margin-left:auto;font-size:11.5px;font-weight:600;color:var(--ink-500);
  background:#f2f4f8;padding:2px 8px;border-radius:999px;
}
.hc-sidebar a.active .count{background:#fff;color:var(--brand-dark)}

@media (max-width: 960px){
  .hc-sidebar{position:static}
}

/* ---------- 主内容 ---------- */
.hc-main{min-width:0}

/* 面包屑 */
.hc-crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-500);margin-bottom:20px;
}
.hc-crumb a{color:var(--ink-500);transition:color .2s}
.hc-crumb a:hover{color:var(--brand)}
.hc-crumb svg{width:14px;height:14px;color:var(--ink-300)}
.hc-crumb span.current{color:var(--ink-900);font-weight:600}

/* 索引页分类卡 */
.hc-cat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:10px}
@media (max-width: 820px){ .hc-cat-grid{grid-template-columns:1fr} }
.hc-cat-card{
  display:block;background:#fff;border:1px solid var(--line);
  border-radius:16px;padding:26px 26px;
  transition:all .3s ease;
}
.hc-cat-card:hover{
  transform:translateY(-4px);border-color:var(--brand-100);
  box-shadow:var(--shadow-md);
}
.hc-cat-card .cat-ico{
  width:44px;height:44px;border-radius:12px;
  background:var(--brand-50);color:var(--brand-dark);
  display:inline-flex;align-items:center;justify-content:center;margin-bottom:14px;
}
.hc-cat-card .cat-ico svg{width:22px;height:22px}
.hc-cat-card h3{font-size:17px;font-weight:700;color:var(--ink-900);margin-bottom:6px}
.hc-cat-card p{font-size:13.5px;color:var(--ink-500);line-height:1.7;margin-bottom:12px}
.hc-cat-card .cat-meta{font-size:12.5px;font-weight:600;color:var(--brand)}

/* 文章列表（分类页） */
.hc-article-list{display:flex;flex-direction:column;gap:2px;margin-top:14px}
.hc-article-list a{
  display:flex;align-items:center;gap:14px;
  padding:16px 18px;border-radius:12px;
  background:#fff;border:1px solid var(--line);
  transition:all .25s ease;
}
.hc-article-list a:hover{
  border-color:var(--brand-100);transform:translateX(4px);
  box-shadow:var(--shadow-sm);
}
.hc-article-list .art-ico{
  width:32px;height:32px;border-radius:9px;flex-shrink:0;
  background:var(--brand-50);color:var(--brand-dark);
  display:flex;align-items:center;justify-content:center;
}
.hc-article-list .art-ico svg{width:15px;height:15px}
.hc-article-list .art-body{flex:1;min-width:0}
.hc-article-list .art-body h4{font-size:14.5px;font-weight:600;color:var(--ink-900);margin-bottom:2px;line-height:1.45}
.hc-article-list .art-body small{font-size:12px;color:var(--ink-500)}
.hc-article-list .art-arrow{width:16px;height:16px;color:var(--ink-300);flex-shrink:0}
.hc-article-list a:hover .art-arrow{color:var(--brand)}

/* 文章正文（Markdown 渲染） */
.hc-article{
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:40px 44px;box-shadow:var(--shadow-sm);
}
@media (max-width: 640px){
  .hc-article{padding:28px 22px;border-radius:14px}
}
.hc-article h1{font-size:28px;font-weight:800;color:var(--ink-900);line-height:1.3;margin-bottom:10px}
.hc-article h2{
  font-size:20px;font-weight:700;color:var(--ink-900);
  margin:32px 0 12px;padding-bottom:10px;border-bottom:1px solid var(--line);line-height:1.4;
}
.hc-article h3{font-size:17.5px;font-weight:700;color:var(--ink-900);margin:26px 0 10px;line-height:1.45}
.hc-article h4{font-size:15.5px;font-weight:700;color:var(--ink-900);margin:20px 0 8px}
.hc-article h5{font-size:14.5px;font-weight:700;color:var(--ink-900);margin:18px 0 6px}
.hc-article h6{font-size:13.5px;font-weight:700;color:var(--ink-700);margin:16px 0 6px;text-transform:uppercase;letter-spacing:.5px}
.hc-article p{
  font-size:15px;line-height:1.85;color:var(--ink-700);margin:10px 0;
}
.hc-article strong{color:var(--ink-900);font-weight:700}
.hc-article em{font-style:italic}
.hc-article a{color:var(--brand);font-weight:600;text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--brand-100)}
.hc-article a:hover{color:var(--brand-dark);text-decoration-color:var(--brand)}
.hc-article ul, .hc-article ol{margin:10px 0 14px 28px;color:var(--ink-700);font-size:15px;line-height:1.85}
.hc-article ul{list-style:disc}
.hc-article ol{list-style:decimal}
.hc-article li{margin:4px 0}
.hc-article li p{margin:4px 0}
.hc-article img{
  max-width:100%;height:auto;display:block;margin:18px 0;
  border-radius:10px;border:1px solid var(--line);
  box-shadow:var(--shadow-sm);
}
.hc-article blockquote{
  margin:16px 0;padding:14px 18px;
  border-left:4px solid var(--brand);background:var(--brand-50);
  border-radius:0 10px 10px 0;font-size:14.5px;color:var(--ink-700);
}
.hc-article blockquote p{margin:6px 0}
.hc-article code{
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  background:#f2f4f8;color:var(--ink-900);
  padding:2px 7px;border-radius:6px;font-size:.9em;
}
.hc-article pre{
  background:#1f2430;color:#e6e8ef;
  padding:16px 18px;border-radius:12px;overflow-x:auto;
  font-size:13.5px;line-height:1.7;margin:16px 0;
}
.hc-article pre code{background:transparent;color:inherit;padding:0;border-radius:0}
.hc-article hr{
  border:none;border-top:1px solid var(--line);margin:28px 0;
}
.hc-article table{
  width:100%;border-collapse:collapse;margin:16px 0;
  font-size:14px;color:var(--ink-700);
}
.hc-article th, .hc-article td{
  padding:10px 14px;border:1px solid var(--line);text-align:left;
}
.hc-article th{background:var(--brand-50);color:var(--brand-dark);font-weight:700}

/* 文章页底部行动区 */
.hc-article-foot{
  margin-top:28px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
}
.hc-article-foot .hc-cta-group{display:flex;gap:10px;flex-wrap:wrap}

/* 相关文章 */
.hc-related{margin-top:36px}
.hc-related h3{
  font-size:12px;font-weight:700;color:var(--ink-500);
  letter-spacing:1.2px;text-transform:uppercase;margin-bottom:10px;
}

.hc-article-list .art-meta{margin:2px 0 4px;font-size:12px;color:var(--ink-500);}
.hc-article-list .art-snip{margin:0;font-size:13px;color:var(--ink-600);line-height:1.5;}
.hc-article-list mark{background:rgba(255,215,0,.45);color:inherit;padding:0 2px;border-radius:2px;}
.hc-noresults{margin-top:24px;color:var(--ink-500);}

.hc-search{position:relative;}
.hc-search-panel{position:absolute;top:calc(100% + 10px);left:0;right:0;background:#fff;border:1px solid rgba(0,0,0,.08);border-radius:14px;max-height:min(70vh,560px);overflow-y:auto;z-index:50;box-shadow:0 20px 50px rgba(0,0,0,.18);text-align:left;padding:8px;}
.hc-search-panel .hc-article-list{display:flex;flex-direction:column;gap:4px;}
.hc-search-panel .hc-article-list a{border-radius:10px;}
.hc-search-panel .hc-noresults{padding:16px;margin:0;text-align:center;color:#64748b;}

/* ͼƬ�����밴ťɫ���� */
.hc-article img{display:block;margin:18px auto;max-width:100%;height:auto;border-radius:8px;}
.hc-article .btn{text-decoration:none;}
.hc-article .btn-primary{color:#fff !important;}
.hc-article .btn-ghost{color:var(--ink-700) !important;}
.hc-article .btn-ghost:hover{color:var(--brand) !important;}