/* 帮助中心 · 企业管理一体化平台 */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary: #1668dc;
  --primary-dark: #0e4fb0;
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #1f2329;
  --text-2: #646a73;
  --border: #e5e6eb;
  --radius: 10px;
}
body { font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif; background: var(--bg); color: var(--text); }
a { color: inherit; text-decoration: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* header */
.site-header { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 50; }
.site-header .container { display: flex; align-items: center; height: 60px; gap: 32px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 700; }
.logo-mark { width: 34px; height: 34px; border-radius: 8px; background: linear-gradient(135deg, var(--primary), #4d9bff); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 15px; font-weight: 800; }
.logo small { color: var(--text-2); font-weight: 400; font-size: 12px; margin-left: 4px; }
.nav { display: flex; gap: 28px; font-size: 15px; }
.nav a { color: var(--text-2); padding: 6px 2px; }
.nav a.active, .nav a:hover { color: var(--primary); font-weight: 600; }
.header-right { margin-left: auto; display: flex; gap: 12px; align-items: center; }
.btn { display: inline-flex; align-items: center; gap: 6px; border-radius: 8px; padding: 8px 18px; font-size: 14px; cursor: pointer; border: 1px solid transparent; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { border-color: var(--border); background: #fff; color: var(--text); }

/* hero */
.hero { background: linear-gradient(135deg, #e8f1ff 0%, #f5f9ff 60%, #eef7f0 100%); padding: 56px 0 44px; text-align: center; }
.hero h1 { font-size: 32px; margin-bottom: 10px; }
.hero p { color: var(--text-2); font-size: 15px; margin-bottom: 26px; }
.search-box { max-width: 640px; margin: 0 auto; display: flex; background: #fff; border: 2px solid var(--primary); border-radius: 12px; overflow: hidden; box-shadow: 0 8px 24px rgba(22,104,220,.12); }
.search-box input { flex: 1; border: 0; outline: 0; padding: 14px 18px; font-size: 15px; }
.search-box button { border: 0; background: var(--primary); color: #fff; padding: 0 30px; font-size: 15px; cursor: pointer; }
.hot-words { margin-top: 14px; font-size: 13px; color: var(--text-2); }
.hot-words a { color: var(--primary); margin: 0 6px; }

/* sections */
.section { padding: 36px 0 8px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 18px; }
.section-head h2 { font-size: 22px; }
.section-head a { color: var(--primary); font-size: 14px; }
.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.cat-card { background: var(--card); border-radius: var(--radius); padding: 20px; border: 1px solid var(--border); transition: .15s; }
.cat-card:hover { border-color: var(--primary); box-shadow: 0 6px 18px rgba(22,104,220,.10); transform: translateY(-2px); }
.cat-card .icon { width: 42px; height: 42px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 20px; margin-bottom: 12px; }
.cat-card h3 { font-size: 16px; margin-bottom: 6px; }
.cat-card p { color: var(--text-2); font-size: 13px; line-height: 1.6; }
.cat-card .count { margin-top: 10px; font-size: 12px; color: var(--primary); }

.article-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.article-item h4 { font-size: 15px; margin-bottom: 8px; }
.article-item h4 a:hover { color: var(--primary); }
.article-item p { color: var(--text-2); font-size: 13px; line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-item .meta { margin-top: 10px; font-size: 12px; color: #8f959e; display: flex; gap: 14px; }
.tag { display: inline-block; padding: 1px 8px; border-radius: 4px; background: #ecf3ff; color: var(--primary); font-size: 12px; }

/* layout with sidebar */
.layout { display: grid; grid-template-columns: 1fr 300px; gap: 20px; align-items: start; }
.side-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; margin-bottom: 16px; }
.side-card h3 { font-size: 15px; margin-bottom: 12px; padding-bottom: 10px; border-bottom: 1px solid var(--border); }
.side-card ol { padding-left: 18px; }
.side-card li { font-size: 13px; color: var(--text-2); margin: 8px 0; line-height: 1.5; }
.side-card li a:hover { color: var(--primary); }

/* article page */
.article-wrap { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 36px; }
.breadcrumb { font-size: 13px; color: var(--text-2); margin-bottom: 16px; }
.breadcrumb a { color: var(--primary); }
.article-wrap h1 { font-size: 24px; margin-bottom: 10px; }
.article-meta { font-size: 13px; color: #8f959e; display: flex; gap: 18px; margin-bottom: 22px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.article-body { font-size: 15px; line-height: 1.9; color: #2b2f36; }
.article-body h2 { font-size: 19px; margin: 22px 0 10px; padding-left: 10px; border-left: 4px solid var(--primary); }
.article-body h3 { font-size: 16px; margin: 18px 0 8px; }
.article-body p { margin: 8px 0; }
.article-body ul, .article-body ol { margin: 8px 0 8px 22px; }
.article-body li { margin: 4px 0; }
.article-body code { background: #f2f3f5; padding: 2px 6px; border-radius: 4px; font-size: 13px; }
.article-body pre { background: #f6f8fa; padding: 14px; border-radius: 8px; overflow: auto; margin: 10px 0; }
.article-body table { border-collapse: collapse; width: 100%; margin: 12px 0; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 8px 12px; font-size: 14px; text-align: left; }
.article-body th { background: #f7f9fc; }
.tip { background: #ecf3ff; border-left: 4px solid var(--primary); padding: 10px 14px; border-radius: 6px; margin: 12px 0; font-size: 14px; }

/* FAQ */
.faq-group { margin-bottom: 26px; }
.faq-group h2 { font-size: 18px; margin-bottom: 12px; }
.faq-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 10px; overflow: hidden; }
.faq-item summary { cursor: pointer; padding: 15px 18px; font-size: 15px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::after { content: "+"; color: var(--primary); font-size: 20px; }
.faq-item[open] summary::after { content: "–"; }
.faq-item .faq-a { padding: 0 18px 16px; color: var(--text-2); font-size: 14px; line-height: 1.8; }

/* community */
.post-item { display: flex; gap: 14px; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 12px; }
.avatar { width: 42px; height: 42px; border-radius: 50%; flex: none; display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; }
.post-main { flex: 1; }
.post-main h4 { font-size: 15px; margin-bottom: 6px; }
.post-main h4 .pin { color: #d4380d; font-size: 12px; border: 1px solid #ffa39e; border-radius: 4px; padding: 0 5px; margin-right: 6px; }
.post-main h4 a:hover { color: var(--primary); }
.post-main .excerpt { color: var(--text-2); font-size: 13px; line-height: 1.6; }
.post-stats { flex: none; display: flex; gap: 18px; align-items: center; font-size: 12px; color: #8f959e; }
.post-stats b { display: block; text-align: center; font-size: 16px; color: var(--text); }
.community-layout { display: grid; grid-template-columns: 220px 1fr; gap: 20px; align-items: start; }
.cat-list { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px; }
.cat-list a { display: flex; justify-content: space-between; padding: 10px 12px; border-radius: 8px; font-size: 14px; color: var(--text-2); }
.cat-list a.active, .cat-list a:hover { background: #ecf3ff; color: var(--primary); font-weight: 600; }

/* footer */
.site-footer { margin-top: 40px; background: #fff; border-top: 1px solid var(--border); padding: 24px 0; text-align: center; color: var(--text-2); font-size: 13px; }