:root{--bg: #ffffff;--surface: #ffffff;--surface-muted: #f7f7f4;--surface-raised: #fbfbf8;--ink: #20201d;--ink-strong: #0f0f0d;--muted: #6f6f68;--faint: #9a9a91;--line: #e5e3dc;--line-strong: #d5d2c8;--accent: #10a37f;--accent-dark: #0d7f63;--accent-soft: #e7f6f1;--code: #f0f0eb;--warning: #fbf3df;--warning-line: #e2be63;--radius: 14px;--shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 16px 42px rgba(0, 0, 0, .06);color:var(--ink);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;line-height:1.6}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg)}button,input,select{font:inherit}button{cursor:pointer}code{display:inline-block;max-width:100%;padding:.35rem .5rem;border:1px solid var(--line);border-radius:8px;color:#3a3a35;background:var(--code);overflow-wrap:anywhere;font-family:SFMono-Regular,Cascadia Mono,Liberation Mono,monospace;font-size:.82rem}.app-shell{min-height:100vh}.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px;padding:0 32px;border-bottom:1px solid var(--line);background:#ffffffdb;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.brand{display:inline-flex;align-items:center;gap:10px;border:0;color:var(--ink-strong);background:transparent;text-align:left}.brand-mark{display:grid;width:32px;height:32px;place-items:center;border-radius:9px;color:#fff;background:var(--ink-strong);font-weight:800}.brand strong,.brand small{display:block}.brand strong{line-height:1.1}.brand small{color:var(--muted);font-size:.76rem}.topbar nav{display:flex;gap:6px;align-items:center}.topbar nav button{border:0;border-radius:999px;padding:8px 12px;color:var(--muted);background:transparent}.topbar nav 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minmax(0,1fr);gap:0;max-width:1280px;margin:0 auto;padding:0 32px 72px}.sidebar{position:sticky;top:64px;height:calc(100vh - 64px);overflow:auto;padding:28px 20px 28px 0;border-right:1px solid var(--line)}.sidebar-section-label{margin-bottom:14px;color:var(--faint);font-size:.75rem;font-weight:750;letter-spacing:.1em;text-transform:uppercase}.group-list{display:grid;gap:16px}.group-title,.doc-link{width:100%;border:0;text-align:left;background:transparent}.group-title{display:flex;justify-content:space-between;gap:10px;padding:0 8px 6px;color:var(--ink-strong);font-size:.9rem;font-weight:750}.group-title b{color:var(--faint);font-weight:650}.doc-link{display:block;margin:2px 0;padding:7px 10px;border-radius:9px;color:var(--muted);font-size:.9rem}.doc-link:hover{color:var(--ink-strong);background:var(--surface-muted)}.doc-link.active{color:var(--accent-dark);background:var(--accent-soft)}.main-panel{min-width:0;padding:28px 0 0 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h2{margin-bottom:14px;color:var(--ink-strong);font-size:1.55rem;letter-spacing:-.025em}.section-copy,.prose-block p,.prose-block li,.doc-section li{color:#4d4d48}.prose-block ul,.prose-block ol{padding-left:1.25rem}.prose-block li{margin:8px 0}.explain-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:16px}.explain-grid div,.field-row,.release-item,details{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface-raised)}.explain-grid div{padding:16px}.explain-grid strong,.field-row strong{color:var(--ink-strong)}.explain-grid p{margin:8px 0 0;color:var(--muted)}.screenshot-grid{display:grid;gap:16px;margin-top:18px}.screenshot-card{margin:0}.fake-browser{overflow:hidden;border:1px solid var(--line-strong);border-radius:16px;background:#fff;box-shadow:var(--shadow)}.browser-bar{display:flex;align-items:center;gap:6px;height:36px;padding:0 12px;border-bottom:1px solid var(--line);background:#f4f4ef}.browser-bar i{width:9px;height:9px;border-radius:50%;background:#cac8bf}.browser-bar span{margin-left:8px;color:var(--faint);font-family:SFMono-Regular,monospace;font-size:.76rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mock-screen{display:grid;grid-template-columns:120px minmax(0,1fr);min-height:250px;background:#fff}.mock-screen aside{padding:16px;border-right:1px solid var(--line);background:#fafaf7}.mock-screen aside b{display:block;margin-bottom:16px;color:var(--ink);font-size:.78rem}.mock-screen aside span{display:block;height:8px;margin:10px 0;border-radius:999px;background:#d9d8d0}.mock-screen aside span:nth-child(2){width:86%;background:var(--accent-soft)}.mock-screen aside span:nth-child(3){width:70%}.mock-screen aside span:nth-child(4){width:78%}.mock-screen main{padding:18px}.mock-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}.mock-toolbar strong{color:var(--ink-strong)}.mock-toolbar button{border:0;border-radius:8px;padding:7px 10px;color:#fff;background:var(--ink-strong);font-size:.78rem}.mock-table{display:grid;gap:9px}.mock-table span{display:block;min-height:36px;padding:8px 10px;border:1px solid var(--line);border-radius:9px;color:var(--muted);background:var(--surface-raised);font-size:.84rem}.screenshot-card figcaption{display:grid;gap:3px;margin-top:10px;color:var(--muted);font-size:.9rem}.screenshot-card figcaption strong{color:var(--ink-strong)}.field-table{display:grid;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.field-row{display:grid;grid-template-columns:180px minmax(0,1fr);gap:16px;padding:14px 16px;border-width:0 0 1px;border-radius:0}.field-row:last-child{border-bottom:0}.field-row span{color:var(--muted)}.flow-list{display:grid;gap:10px}.flow-item{display:grid;grid-template-columns:34px minmax(0,1fr);gap:12px;align-items:start}.flow-item 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var(--line-strong);border-radius:16px;background:#fff;box-shadow:var(--shadow)}.real-shot-card figcaption{display:grid;gap:4px;margin-top:10px;color:var(--muted);font-size:.9rem}.real-shot-card figcaption strong{color:var(--ink-strong)}.annotation-layout{display:grid;grid-template-columns:minmax(0,1fr) 180px;gap:12px}.annotation-layout ol{margin:0;padding:12px 12px 12px 28px;border:1px solid var(--line);border-radius:12px;color:var(--muted);background:#fff;font-size:.82rem}.mock-toolbar small{display:block;margin-top:2px;color:var(--faint)}.mock-screen aside span{height:auto;min-height:8px;padding:4px 0;background:transparent;color:var(--muted);font-size:.75rem}.mock-screen aside span:nth-child(n){width:auto;background:transparent}@media (max-width: 980px){.home-overview{max-width:none}.overview-grid,.module-grid,.purpose-grid,.relation-chain,.annotation-layout{grid-template-columns:1fr}}.home-screenshot{margin:28px 0 0;padding-bottom:34px;border-bottom:1px solid var(--line)}.home-screenshot img{display:block;width:100%;border:1px solid var(--line-strong);border-radius:16px;background:#fff;box-shadow:var(--shadow)}.home-screenshot figcaption{display:grid;gap:4px;margin-top:10px;color:var(--muted);font-size:.9rem}.home-screenshot figcaption strong{color:var(--ink-strong)}.step-shot-list{display:grid;gap:16px;margin-top:18px}.step-shot-card{display:grid;grid-template-columns:minmax(260px,.92fr) minmax(0,1.4fr);gap:16px;align-items:start;padding:16px;border:1px solid var(--line);border-radius:16px;background:var(--surface-raised)}.step-shot-copy span{display:inline-flex;margin-bottom:10px;padding:4px 9px;border-radius:999px;color:var(--accent-dark);background:var(--accent-soft);font-size:.78rem;font-weight:760}.step-shot-copy p{margin:0;color:var(--ink)}.step-shot-thumb{margin:0;overflow:hidden;border:1px solid var(--line-strong);border-radius:12px;background:#fff}.step-shot-thumb 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