*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;background:#f6f6f6;color:#1a1a1a;line-height:1.7;font-size:15px}
a{color:#175199;text-decoration:none}
a:hover{color:#0066ff}
.zh-topbar{position:sticky;top:0;z-index:200;background:#fff;box-shadow:0 1px 3px rgba(18,18,18,.1)}
.zh-topbar-inner{max-width:1000px;margin:0 auto;padding:10px 20px;display:flex;align-items:center;gap:20px}
.zh-logo{font-size:1.35rem;font-weight:700;color:#0066ff;white-space:nowrap;letter-spacing:-.02em}
.zh-logo:hover{color:#0052cc;text-decoration:none}
.zh-search-wrap{flex:1;display:flex;max-width:520px;background:#f6f6f6;border:1px solid #ebebeb;border-radius:6px;overflow:hidden}
.zh-search{flex:1;border:none;background:transparent;padding:8px 12px;font-size:14px;outline:none}
.zh-search-btn{border:none;background:#0066ff;color:#fff;padding:8px 18px;cursor:pointer;font-size:14px}
.zh-search-btn:hover{background:#0052cc}
.zh-page{max-width:1000px;margin:0 auto;padding:10px 20px 40px}
.zh-layout{display:grid;grid-template-columns:1fr 296px;gap:10px;align-items:start}
.zh-main{min-width:0}
.zh-feed-card{background:#fff;border-radius:4px;box-shadow:0 1px 3px rgba(18,18,18,.06);padding:16px 20px;margin-bottom:10px}
.zh-intro-card .zh-intro-text{color:#444;font-size:15px;line-height:1.8}
.zh-author{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.zh-avatar{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,#0066ff,#00a3ff);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;flex-shrink:0}
.zh-avatar-ans{background:linear-gradient(135deg,#0084ff,#0066ff)}
.zh-author-name{font-weight:600;color:#1a1a1a;font-size:15px;display:block}
.zh-author-desc{font-size:13px;color:#8590a6}
.zh-feed-title{font-size:17px;font-weight:600;color:#1a1a1a;margin-bottom:12px;padding-bottom:10px;border-bottom:1px solid #f0f2f7}
.zh-feed-list{list-style:none}
.zh-feed-list li{border-bottom:1px solid #f0f2f7}
.zh-feed-list li:last-child{border-bottom:none}
.zh-feed-item{display:flex;flex-direction:column;padding:12px 0;transition:.1s}
.zh-feed-item:hover{text-decoration:none;background:transparent}
.zh-feed-item:hover .zh-item-title{color:#0066ff}
.zh-item-title{font-size:15px;font-weight:500;color:#1a1a1a}
.zh-item-meta{font-size:13px;color:#8590a6;margin-top:4px}
.zh-feed-list-sm .zh-feed-item{padding:8px 0}
.zh-question-card{padding:20px 24px}
.zh-q-title{font-size:22px;font-weight:600;color:#1a1a1a;line-height:1.4;margin-bottom:8px}
.zh-q-sub{font-size:15px;color:#646464;margin-bottom:12px}
.zh-q-meta{display:flex;flex-wrap:wrap;gap:12px 20px;font-size:13px;color:#8590a6}
.zh-answer-card{padding:16px 24px 24px}
.zh-answer-body{padding-left:48px}
.zh-attr-line{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:13px;color:#8590a6;margin-bottom:16px;padding:12px;background:#f6f6f6;border-radius:4px}
.zh-attr-line b{color:#444;font-weight:500;margin-right:8px}
.zh-ans-h3{font-size:16px;font-weight:600;color:#1a1a1a;margin:18px 0 8px}
.zh-ans-p{color:#1a1a1a;margin-bottom:10px;text-align:justify}
.zh-rich{color:#1a1a1a;line-height:1.8}
.zh-rich p{margin-bottom:.6em}
.zh-tags{display:flex;flex-wrap:wrap;gap:8px}
.zh-tags a{padding:5px 12px;background:#f0f7ff;color:#175199;border-radius:4px;font-size:14px}
.zh-tags a:hover{background:#e1efff;text-decoration:none}
.zh-char-show{font-size:3rem;font-weight:700;color:#0066ff;text-align:center;padding:16px 0}
.zh-hint{font-size:13px;color:#8590a6!important}
.zh-word-grid{list-style:none;display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
@media(min-width:600px){.zh-word-grid{grid-template-columns:repeat(3,1fr)}}
.zh-word-grid a{display:flex;flex-direction:column;padding:10px 12px;border:1px solid #f0f2f7;border-radius:4px}
.zh-word-grid a:hover{border-color:#0066ff;background:#f0f7ff;text-decoration:none}
.zh-word-grid b{font-size:15px;color:#1a1a1a}
.zh-word-grid em{font-size:12px;color:#8590a6;font-style:normal;margin-top:2px}
.zh-aside{display:flex;flex-direction:column;gap:10px}
.zh-side-card{background:#fff;border-radius:4px;box-shadow:0 1px 3px rgba(18,18,18,.06);padding:16px}
.zh-side-card h3{font-size:15px;font-weight:600;margin-bottom:10px;color:#1a1a1a}
.zh-side-card p{font-size:13px;color:#646464;line-height:1.7}
.zh-side-list{list-style:none}
.zh-side-list li{padding:8px 0;border-bottom:1px solid #f0f2f7;font-size:14px}
.zh-side-list li:last-child{border-bottom:none}
.zh-friend{margin-top:10px;padding:14px 0;font-size:13px;color:#8590a6;display:flex;flex-wrap:wrap;gap:8px 16px}
.zh-footer{text-align:center;padding:24px 0;color:#8590a6;font-size:13px}
.zh-footer a{color:#8590a6}
@media(max-width:768px){
.zh-layout{grid-template-columns:1fr}
.zh-answer-body{padding-left:0}
.zh-topbar-inner{flex-wrap:wrap}
.zh-search-wrap{max-width:100%;order:3;width:100%}
}