:root{font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;color:#253044;background:#f5f7fa;font-synthesis:none;--blue:#234fe8;--muted:#8590a3;--border:#e5e9f0}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input{font:inherit}a:focus-visible,input:focus-visible{outline:3px solid #8ca5ff;outline-offset:4px}
.site-header{height:76px;background:#fff;border-bottom:1px solid var(--border)}.header-inner{height:100%;max-width:1680px;padding:0 40px;margin:auto;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px;font-size:22px;font-weight:700;letter-spacing:-.7px}.brand-mark{display:grid;place-items:center;width:34px;height:34px;background:var(--blue);border-radius:10px;color:white;font-size:23px;letter-spacing:-1px}.brand-divider{height:20px;width:1px;background:var(--border);margin:0 5px}.brand-caption{font-size:14px;color:#69758a;font-weight:500;letter-spacing:0}.header-label{font-size:12px;color:var(--muted)}
.home-main{max-width:1280px;margin:0 auto;padding:54px 40px 80px;min-height:calc(100vh - 134px)}.home-heading{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:35px}.eyebrow{color:var(--blue);font-size:11px;font-weight:700;letter-spacing:2.4px;margin:0 0 12px}h1{font-size:30px;letter-spacing:-.8px;margin:0;font-weight:650}.home-description{font-size:14px;color:#8b95a7;margin:12px 0 0;line-height:1.7}.requirement-count{font-size:12px;color:#7c879a;padding-bottom:4px}.list-toolbar{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);margin-bottom:28px;gap:20px}.list-tab{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;color:var(--blue);border-bottom:2px solid var(--blue);height:58px}.list-tab span{padding:2px 6px;border-radius:5px;background:#e8edff;font-size:11px}.search-box{display:flex;gap:8px;align-items:center;border:1px solid var(--border);border-radius:8px;background:white;padding:0 12px;height:36px;color:#98a2b3;width:250px;font-size:22px}.search-box input{border:0;outline:none;background:transparent;width:100%;min-width:0;font-size:12px;color:#253044}.search-box:focus-within{border-color:#829df6;box-shadow:0 0 0 3px #234fe80b}.search-box input:focus-visible{outline:none}.search-box input::placeholder{color:#a0a9b8}.requirement-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.requirement-card{background:white;border:1px solid var(--border);border-radius:12px;padding:20px;transition:border-color .15s,box-shadow .15s,transform .15s}.requirement-card:hover{border-color:#bdcaff;box-shadow:0 10px 30px #22355a0a;transform:translateY(-2px)}.card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.requirement-id{font-size:11px;color:#7e899b;letter-spacing:.5px}.status-badge{font-size:11px;background:#f1f3f7;color:#7a8597;border-radius:5px;line-height:1;padding:6px 8px;white-space:nowrap}.card-preview{height:154px;background:#f5f7fb;border-radius:8px;padding:23px 27px;margin-bottom:22px;display:flex;align-items:center;justify-content:center}.mini-shell{width:100%;height:100%;max-width:290px;background:#fff;border:1px solid #e3e8f2;border-radius:5px;position:relative;overflow:hidden;box-shadow:0 6px 10px #50607806}.mini-toolbar{height:15px;background:#fafbfe;border-bottom:1px solid #edf0f6;display:flex;align-items:center;gap:3px;padding:0 6px}.mini-toolbar i{width:3px;height:3px;border-radius:50%;background:#d7deea}.mini-canvas{position:absolute;left:0;top:15px;bottom:0;right:22%;background:#fff}.mini-notes{position:absolute;top:15px;bottom:0;right:0;width:22%;border-left:1px solid #edf0f6;padding:12px 6px;background:#fcfdff}.mini-notes span{display:block;height:3px;background:#edf0f6;border-radius:2px;margin-bottom:6px}.mini-notes span:nth-child(2){width:75%}.mini-notes span:nth-child(3){width:45%}.requirement-card h2{font-size:17px;font-weight:600;margin:0 0 24px}.card-bottom{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:10px;color:#98a2b3}.metadata-dot{padding:0 6px}.card-open{font-size:11px;color:#526bba;white-space:nowrap}.card-open span{margin-left:3px}.home-footer{height:58px;display:grid;place-items:center;color:#a5adba;font-size:11px;border-top:1px solid #edf0f5}.list-empty{grid-column:1/-1;text-align:center;padding:65px 20px;color:#98a2b3}.empty-symbol{font-size:40px}.list-empty h2{font-size:16px;color:#677388;margin:18px 0 8px}.list-empty p{font-size:13px}
.detail-main{max-width:1680px;margin:auto;padding:28px 40px 32px}.detail-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px}.detail-title{display:flex;align-items:center;gap:14px}.detail-title h1{font-size:23px;letter-spacing:0}.updated-date{font-size:11px;color:#9aa3b2}.detail-workspace{display:grid;grid-template-columns:minmax(0,4fr) minmax(250px,1fr);gap:20px;min-height:calc(100vh - 183px)}.prototype-panel{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:10px;background:#fff;min-width:0;overflow:hidden}.page-tabs{display:flex;align-items:center;gap:20px;padding:0 24px;min-height:49px;border-bottom:1px solid var(--border);background:#fdfdff}.page-tab{display:flex;align-items:center;min-height:49px;border-bottom:2px solid transparent;font-size:12px;color:#8b95a5}.page-tab.is-active{color:var(--blue);border-bottom-color:var(--blue);font-weight:600}.prototype-canvas{background:white;flex:1;min-height:460px;position:relative}.notes-panel{border:1px solid var(--border);border-radius:10px;background:white;min-width:0;padding:0 20px}.back-link{display:flex;align-items:center;gap:7px;border-bottom:1px solid var(--border);font-size:12px;color:#7d889b;height:50px}.back-link:hover{color:var(--blue)}.notes-heading{display:flex;align-items:center;justify-content:space-between;padding:24px 0 10px}.notes-heading h2{font-size:14px;margin:0;font-weight:600}.notes-heading span{font-size:11px;color:#a5adba}.notes-empty{color:#b1b8c5;text-align:center;padding:52px 0}.notes-empty-icon{display:grid;place-items:center;margin:auto;font-size:23px;width:32px;height:36px;border:1px solid #e9edf3;border-radius:5px;color:#c3cad6}.notes-empty p{font-size:12px;margin-top:15px}.annotation-card{border-top:1px solid var(--border);padding:18px 0}.annotation-id{font-size:10px;color:var(--blue)}.annotation-card h3{font-size:13px;margin:9px 0}.annotation-card p{font-size:12px;line-height:1.8;color:#768196;white-space:pre-wrap}.not-found{text-align:center;padding:100px 24px}.not-found p:not(.eyebrow){color:#8b95a5;font-size:14px;margin:18px 0 32px}.primary-link{display:inline-flex;align-items:center;padding:11px 20px;border-radius:8px;background:var(--blue);color:white;font-size:13px}
@media(min-width:1500px){.detail-workspace{grid-template-columns:minmax(0,4fr) minmax(280px,1fr)}}
@media(max-width:1050px){.requirement-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.header-inner{padding:0 28px}.home-main{padding:40px 28px 60px}.detail-main{padding:24px 28px}.detail-workspace{grid-template-columns:minmax(0,1fr) 250px;gap:14px}.detail-title h1{font-size:21px}}
@media(max-width:720px){.site-header{height:64px}.header-inner{padding:0 20px}.brand{font-size:20px;gap:9px}.brand-mark{width:30px;height:30px;font-size:21px}.brand-caption{font-size:12px}.brand-divider{margin:0 2px}.header-label{display:none}.home-main{padding:32px 20px 48px;min-height:calc(100vh - 122px)}.home-heading{margin-bottom:24px}h1{font-size:26px}.home-description{font-size:12px}.list-toolbar{gap:12px;margin-bottom:20px}.search-box{width:200px}.list-tab{font-size:12px;gap:7px}.requirement-grid{grid-template-columns:1fr}.requirement-card{max-width:none}.card-preview{height:170px}.card-bottom{font-size:11px}.detail-main{padding:22px 16px}.detail-heading{align-items:flex-start;margin-bottom:18px}.detail-title{gap:9px;flex-wrap:wrap}.detail-title h1{font-size:20px}.updated-date{display:none}.detail-workspace{grid-template-columns:1fr;min-height:0}.prototype-canvas{min-height:55vh}.notes-panel{min-height:200px}.notes-empty{padding:22px 0 32px}.page-tabs{padding:0 18px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}