:root{--bg:#f4f2ef;--panel:#fff;--line:#d9d1c8;--muted:#6e665f;--text:#1d3557;--accent:#d61f3c;--accent-soft:#fff1f3;--shadow:0 16px 40px #181e2814;--radius:22px;color:var(--text);background:radial-gradient(circle at 0 0,#d61f3c1f,#0000 30%),linear-gradient(#faf7f2 0%,#f3efe8 100%)}*{box-sizing:border-box}body{background:var(--bg);min-height:100vh;margin:0;font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}button,input,select,textarea{font:inherit}a{color:inherit}#root{min-height:100vh}.app-shell{grid-template-columns:300px 1fr;min-height:100vh;display:grid}.sidebar{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:linear-gradient(#ffffffeb 0%,#fffaf4eb 100%);border-right:1px solid #1d35571a;height:100vh;padding:28px 20px 20px;position:sticky;top:0}.brand{align-items:center;gap:14px;margin-bottom:24px;display:flex}.brand strong{font-size:1.4rem;line-height:1.1;display:block}.brand p{color:var(--muted);margin:6px 0 0;font-size:.88rem}.brand-mark{width:52px;height:52px;box-shadow:var(--shadow);background:linear-gradient(#fff,#ffe7eb);border-radius:16px;position:relative;overflow:hidden}.brand-mark span{background:var(--accent);width:2px;position:absolute;top:8px;bottom:8px}.brand-mark span:first-child{left:14px;transform:rotate(22deg)}.brand-mark span:nth-child(2){left:25px}.brand-mark span:nth-child(3){left:36px;transform:rotate(-22deg)}.sidebar-search input,.inline-input{border:1px solid var(--line);width:100%;height:42px;color:var(--text);background:#fffdf9;border-radius:14px;padding:0 14px}.sidebar-search input:focus,.inline-input:focus,.code-editor:focus,select:focus{border-color:#d61f3c80;outline:2px solid #d61f3c2e}.tool-nav{flex-direction:column;gap:10px;max-height:calc(100vh - 160px);margin-top:20px;padding-right:4px;display:flex;overflow:auto}.tool-link{text-align:left;width:100%;color:var(--text);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:14px;padding:14px 16px;font-size:1.03rem;font-weight:700;transition:all .18s}.tool-link:hover{background:#ffffffd9;border-color:#1d355714}.tool-link.active{color:var(--accent);background:linear-gradient(#fff5f6 0%,#ffe7eb 100%);border-color:#d61f3c33;box-shadow:inset 0 0 0 1px #d61f3c08}.workspace{padding:32px}.workspace-header{justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:24px;display:flex}.workspace-header h1{margin:0 0 8px;font-size:clamp(2rem,4vw,3rem);line-height:1}.workspace-header p{color:var(--muted);max-width:720px;margin:0}.header-badges{flex-wrap:wrap;gap:10px;display:flex}.header-badges span{height:38px;color:var(--muted);background:#ffffffe6;border:1px solid #1d355714;border-radius:999px;align-items:center;padding:0 14px;display:inline-flex}.workspace-body,.knowledge-grid,.split-grid,.quad-grid{gap:18px;display:grid}.split-grid,.quad-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.panel{background:var(--panel);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid #1d355714;padding:22px}.panel-head{justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:18px;display:flex}.panel-head h2{margin:0 0 6px;font-size:1.2rem}.panel-head p{color:var(--muted);margin:0}.panel-actions{flex-wrap:wrap;gap:10px;display:flex}.tool-button{color:var(--text);cursor:pointer;background:#f8f6f2;border:1px solid #1d355714;border-radius:12px;height:40px;padding:0 14px;transition:all .18s}.tool-button:hover{transform:translateY(-1px)}.tool-button.primary{color:#fff;background:linear-gradient(#ef2948,#c91130);border-color:#0000}.tool-button.ghost{background:0 0}.editor-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.code-editor{resize:vertical;color:#112b46;background:#fcfbf8;border:1px solid #1d35571f;border-radius:18px;width:100%;min-height:320px;padding:16px 18px;font-family:Cascadia Code,Consolas,monospace;line-height:1.55}.code-editor.output{background:#f9fafb}.code-editor.tall{min-height:420px}.option-row{flex-wrap:wrap;align-items:center;gap:16px;margin-top:16px;display:flex}.option-row label{color:var(--muted);align-items:center;gap:10px;display:inline-flex}select{border:1px solid var(--line);background:#fff;border-radius:12px;height:40px;padding:0 12px}.preview-frame{background:#fff;border:1px solid #1d35571f;border-radius:18px;width:100%;min-height:520px}.diff-view{border:1px solid #1d355714;border-radius:18px;gap:0;display:grid;overflow:hidden}.diff-line{white-space:pre-wrap;word-break:break-word;background:#fff;margin:0;padding:10px 14px;font-family:Cascadia Code,Consolas,monospace;line-height:1.45}.diff-line.added{color:#1a7f37;background:#eaf8ef}.diff-line.removed{color:#b42318;background:#fff1f3}.diff-line.unchanged{color:#5d6774;background:#fbfbfb}.error-box{color:#b42318;background:#fff1f3;border-radius:16px;margin-top:16px;padding:12px 14px}.empty-state{color:var(--muted);text-align:center;border:1px dashed #1d35572e;border-radius:16px;padding:36px 18px}.image-preview{max-width:100%;max-height:640px;box-shadow:var(--shadow);border-radius:18px;margin:0 auto;display:block}.link-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;display:grid}.resource-card{background:linear-gradient(#fff 0%,#faf7f3 100%);border:1px solid #1d355714;border-radius:18px;gap:8px;padding:18px;text-decoration:none;display:grid}.resource-card strong{font-size:1rem}.resource-card span{color:var(--muted);overflow-wrap:anywhere;font-size:.9rem}.guide-root{gap:20px;display:grid}.guide-intro{background:#faf7f3;border:1px solid #1d355714;border-radius:18px;gap:10px;padding:16px 18px;display:grid}.guide-intro p{color:var(--muted);margin:0;line-height:1.7}.guide-group{gap:14px;display:grid}.guide-group h3,.guide-card h4{margin:0}.guide-stack{gap:14px;display:grid}.guide-card{background:linear-gradient(#fff 0%,#fbf8f3 100%);border:1px solid #1d355714;border-radius:18px;gap:12px;padding:18px;display:grid}.guide-code{color:#f7fafc;background:#112b46;border-radius:16px;margin:0;padding:16px 18px;font-family:Cascadia Code,Consolas,monospace;line-height:1.6;overflow:auto}.guide-list{color:var(--muted);margin:0;padding-left:20px;line-height:1.7}.guide-list li+li{margin-top:8px}.guide-badge{background:var(--accent-soft);min-height:38px;color:var(--accent);border:1px solid #d61f3c24;border-radius:999px;align-items:center;padding:0 14px;font-weight:700;display:inline-flex}.share-link-box{background:var(--accent-soft);border-radius:16px;gap:10px;margin-top:16px;padding:14px;display:grid}.share-link-box a{overflow-wrap:anywhere}.toast{color:#fff;box-shadow:var(--shadow);background:#112b46eb;border-radius:14px;padding:12px 16px;position:fixed;bottom:24px;right:24px}@media (width<=1100px){.app-shell{grid-template-columns:1fr}.sidebar{border-bottom:1px solid #1d35571a;border-right:0;height:auto;position:static}.tool-nav{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));max-height:none;display:grid}.workspace{padding:20px}.workspace-header{flex-direction:column}}@media (width<=780px){.editor-grid,.split-grid,.quad-grid{grid-template-columns:1fr}.panel-head{flex-direction:column}.panel-actions,.option-row,.header-badges,.tool-button,.inline-input{width:100%}}