*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;background:#eceff1;color:#333;line-height:1.75;font-size:15px}
a{color:#3eaf7c;text-decoration:none}
a:hover{color:#2d8f66;text-decoration:underline}

/* Header */
.wk-header{background:linear-gradient(180deg,#3eaf7c,#38a06f);color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.12)}
.wk-header-inner{max-width:1200px;margin:0 auto;padding:0 20px;height:56px;display:flex;align-items:center;gap:16px}
.wk-logo{display:flex;align-items:center;gap:10px;color:#fff;font-size:1.1rem;font-weight:700;white-space:nowrap;flex-shrink:0}
.wk-logo:hover{text-decoration:none;color:#fff;opacity:.92}
.wk-logo-icon{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.35);border-radius:4px;font-size:15px;font-weight:700}
.wk-search-wrap{flex:1;display:flex;justify-content:center;max-width:560px;margin:0 auto}
.wk-search{display:flex;width:100%;background:#fff;border-radius:4px;overflow:hidden;box-shadow:0 1px 4px rgba(0,0,0,.1)}
.wk-search input{flex:1;border:none;padding:9px 14px;font-size:14px;color:#333;outline:none;min-width:0}
.wk-search-btn{border:none;background:#4caf50;color:#fff;padding:9px 20px;cursor:pointer;font-size:14px;white-space:nowrap;font-weight:500}
.wk-search-btn:hover{background:#43a047}
.wk-sidebar-toggle{display:none;border:1px solid rgba(255,255,255,.5);background:rgba(255,255,255,.15);color:#fff;padding:6px 12px;border-radius:4px;font-size:13px;cursor:pointer;flex-shrink:0}
.wk-sidebar-toggle:hover{background:rgba(255,255,255,.25)}

/* Page shell */
.wk-page{max-width:1200px;margin:0 auto;padding:16px 20px 40px}
.wk-crumb{font-size:13px;color:#999;margin-bottom:14px}
.wk-crumb a{color:#3eaf7c}
.wk-crumb span{margin:0 6px;color:#ccc}

/* Layout: left sidebar + paper doc */
.wk-layout{display:flex;gap:20px;align-items:flex-start}
.wk-sidebar{width:220px;flex-shrink:0;position:sticky;top:16px;max-height:calc(100vh - 32px);overflow-y:auto}
.wk-doc{flex:1;min-width:0}
.wk-doc-inner{background:#fff;border-radius:2px;box-shadow:0 1px 6px rgba(0,0,0,.08),0 0 1px rgba(0,0,0,.06);padding:32px 40px 28px;min-height:520px}

/* Sidebar panels */
.wk-side-panel{background:#fff;border-radius:2px;box-shadow:0 1px 4px rgba(0,0,0,.06);margin-bottom:12px;overflow:hidden}
.wk-side-hd{padding:10px 14px;font-size:13px;font-weight:700;color:#333;background:#f7faf8;border-bottom:1px solid #e8f0eb;border-left:3px solid #3eaf7c}
.wk-side-bd{padding:12px 14px;font-size:13px;color:#666;line-height:1.7}
.wk-side-list{list-style:none}
.wk-side-list li{border-bottom:1px solid #f0f0f0}
.wk-side-list li:last-child{border-bottom:none}
.wk-side-list a{display:block;padding:8px 14px;font-size:13px;color:#555}
.wk-side-list a:hover{background:#f5faf7;color:#3eaf7c;text-decoration:none}
.wk-meta-dl{padding:10px 14px;font-size:12px}
.wk-meta-dl dt{color:#999;font-weight:400;margin-top:6px}
.wk-meta-dl dt:first-child{margin-top:0}
.wk-meta-dl dd{color:#333;margin-left:0}

/* Outline / TOC */
.wk-outline{background:#fff;border-radius:2px;box-shadow:0 1px 4px rgba(0,0,0,.06);margin-bottom:12px;overflow:hidden}
.wk-outline-hd{padding:10px 14px;font-size:13px;font-weight:700;color:#fff;background:#3eaf7c}
.wk-outline-list{list-style:none;padding:8px 0}
.wk-outline-list li{border-bottom:1px dashed #f0f0f0}
.wk-outline-list li:last-child{border-bottom:none}
.wk-outline-list a{display:block;padding:7px 14px 7px 18px;font-size:13px;color:#555;position:relative}
.wk-outline-list a::before{content:"";position:absolute;left:8px;top:50%;width:4px;height:4px;background:#3eaf7c;border-radius:50%;transform:translateY(-50%);opacity:.5}
.wk-outline-list a:hover{background:#f5faf7;color:#3eaf7c;text-decoration:none}

/* Document title bar */
.wk-doc-titlebar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding-bottom:14px;border-bottom:2px solid #3eaf7c;margin-bottom:12px}
.wk-doc-title{font-size:26px;font-weight:700;color:#333;line-height:1.3}
.wk-doc-badge{display:inline-block;font-size:12px;color:#3eaf7c;background:#e8f5e9;border:1px solid #c8e6c9;padding:2px 10px;border-radius:2px;font-weight:500}

/* Meta row */
.wk-doc-meta-row{font-size:13px;color:#999;margin-bottom:16px}
.wk-pinyin{color:#666}
.wk-zhuyin{color:#999}
.wk-sep{margin:0 8px;color:#ddd}

.wk-doc-intro{margin-bottom:24px;color:#666;font-size:14px;line-height:1.8}
.wk-doc-tip{color:#999;font-size:13px;margin-top:6px}
.wk-doc-attrs{margin-bottom:24px;padding:12px 16px;background:#fafafa;border:1px solid #eee;border-radius:2px}
.wk-attr-grid{display:grid;grid-template-columns:auto 1fr;gap:4px 16px;font-size:13px}
.wk-attr-grid dt{color:#999;font-weight:400}
.wk-attr-grid dd{color:#333}

/* Chapters */
.wk-chapter{margin-bottom:28px}
.wk-chapter-hd{font-size:17px;font-weight:700;color:#333;margin-bottom:12px;display:flex;align-items:center;gap:10px;padding-bottom:8px;border-bottom:1px solid #eee}
.wk-chapter-num{display:inline-flex;align-items:center;justify-content:center;min-width:28px;height:28px;background:#3eaf7c;color:#fff;font-size:13px;border-radius:2px;padding:0 8px;font-weight:600}
.wk-appendix .wk-chapter-num{background:#78909c}
.wk-chapter-bd{color:#333;font-size:15px;line-height:1.85}
.wk-chapter-bd p{text-indent:2em;margin-bottom:.6em}
.wk-rich p{text-indent:2em;margin-bottom:.6em}
.wk-hint{font-size:13px;color:#999;text-indent:0!important;margin-bottom:12px}

/* Doc list (index) */
.wk-doc-list{list-style:none}
.wk-doc-item{border-bottom:1px solid #f0f0f0}
.wk-doc-item:last-child{border-bottom:none}
.wk-doc-link{display:flex;align-items:flex-start;gap:12px;padding:14px 8px;transition:background .15s}
.wk-doc-link:hover{background:#f9fdfb;text-decoration:none}
.wk-doc-icon{flex-shrink:0;width:36px;height:44px;background:linear-gradient(135deg,#e8f5e9 0%,#fff 40%,#e8f5e9 100%);border:1px solid #c8e6c9;border-radius:2px;position:relative;box-shadow:0 1px 3px rgba(62,175,124,.15)}
.wk-doc-icon::before{content:"";position:absolute;top:8px;left:8px;right:8px;height:2px;background:#3eaf7c;opacity:.4;box-shadow:0 6px 0 #3eaf7c,0 12px 0 #3eaf7c;opacity:.25}
.wk-doc-icon-sm{width:28px;height:34px}
.wk-doc-info{display:flex;flex-direction:column;gap:4px;min-width:0}
.wk-doc-name{font-size:15px;color:#333;font-weight:600}
.wk-doc-meta{font-size:12px;color:#999;font-weight:400}
.wk-doc-link:hover .wk-doc-name{color:#3eaf7c}

/* Zuci tags & char list */
.wk-zuci-tags{display:flex;flex-wrap:wrap;gap:8px;list-style:none}
.wk-zuci-tags a{display:inline-block;padding:4px 14px;background:#f5faf7;border:1px solid #c8e6c9;border-radius:2px;font-size:14px;color:#3eaf7c}
.wk-zuci-tags a:hover{background:#e8f5e9;text-decoration:none}
.wk-zuci-doc-list{list-style:none}
.wk-zuci-doc-list li{border-bottom:1px solid #f0f0f0}
.wk-zuci-doc-link{display:flex;align-items:center;gap:12px;padding:12px 8px}
.wk-zuci-doc-link:hover{background:#f9fdfb;text-decoration:none}
.wk-zuci-doc-info{display:flex;flex-direction:column;gap:2px}
.wk-zuci-doc-info strong{font-size:15px;color:#333;font-weight:600}
.wk-zuci-doc-info span{font-size:12px;color:#999}
.wk-zuci-doc-link:hover strong{color:#3eaf7c}

/* Links & footer */
.wk-links{margin-top:24px;padding-top:16px;border-top:1px dashed #e5e5e5;font-size:13px}
.wk-links-label{color:#999;margin-right:8px}
.wk-links-bar{display:inline-flex;flex-wrap:wrap;gap:8px 16px;margin-top:6px}
.wk-links-bar a{color:#3eaf7c;font-size:13px}
.wk-doc-foot{margin-top:28px;padding-top:14px;border-top:1px solid #eee;font-size:12px;color:#999;text-align:right}
.wk-footer{text-align:center;padding:16px 20px;font-size:12px;color:#999;border-top:1px solid #e0e0e0;background:#fff;margin-top:8px}
.wk-footer a{color:#999}

/* Responsive */
@media(max-width:860px){
.wk-header-inner{height:auto;min-height:56px;padding:10px 16px;flex-wrap:wrap}
.wk-search-wrap{order:3;width:100%;max-width:none;margin:0}
.wk-sidebar-toggle{display:block;margin-left:auto}
.wk-layout{flex-direction:column}
.wk-sidebar{width:100%;position:static;max-height:none;display:none}
.wk-sidebar.wk-sidebar-open{display:block}
.wk-doc-inner{padding:20px 18px 24px;min-height:auto}
.wk-doc-title{font-size:22px}
}