*{box-sizing:border-box}html{background:var(--page-bg);scroll-behavior:smooth}body{margin:0;background:var(--page-bg);color:var(--text-primary);font-family:var(--font);font-size:14px;line-height:1.55}button,input,textarea,select{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}button,a{transition:background-color .16s,border-color .16s,color .16s,box-shadow .16s,transform .16s}h1,h2,h3,h4,p{margin-top:0}h1{font-size:31px;line-height:1.15;letter-spacing:-.035em}h2{font-size:20px;letter-spacing:-.02em}h3{font-size:15px}small{color:var(--text-muted)}[hidden]{display:none!important}.muted{color:var(--text-muted)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
.app-page{padding:24px}.tool-app{min-height:calc(100vh - 84px)}.tool-layout{display:grid;grid-template-columns:var(--sidebar) minmax(0,1fr);min-height:calc(100vh - 84px)}.tool-sidebar{background:#fff;border-right:1px solid var(--border);padding:22px 16px;position:sticky;top:84px;height:calc(100vh - 84px);overflow:auto}.tool-main{min-width:0;padding:25px 27px 42px}.tool-brand-block{padding:0 10px 18px;border-bottom:1px solid var(--border)}.tool-brand-block small{display:block;font-size:10px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:5px}.tool-brand-block strong{font-size:16px}.tool-side-nav{display:grid;gap:5px;margin-top:18px}.tool-side-link{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;color:var(--text-secondary);font-size:13px}.tool-side-link:hover{background:var(--surface-soft);color:var(--text-primary)}.tool-side-link.active{background:var(--accent-soft);color:#3448b7;font-weight:700}.tool-side-link.disabled{opacity:.42;pointer-events:none}.tool-side-icon{width:22px;text-align:center;font-size:14px}.tool-current-card{margin-top:24px;padding:14px;border:1px solid var(--border);border-radius:12px;background:var(--surface-soft)}.tool-current-card small{display:block;font-size:10px}.tool-current-card strong{display:block;margin:7px 0 5px;font-size:12px;line-height:1.45}.tool-current-card span{display:block;color:var(--text-muted);font-size:10px}.tool-current-line{height:5px;margin-top:10px;background:#e9edf3;border-radius:99px;overflow:hidden}.tool-current-line i{display:block;width:74%;height:100%;background:var(--accent);border-radius:99px}.tool-sidebar-note{margin-top:16px;padding:12px;border-radius:11px;background:#f8f9ff;border:1px solid #e1e4ff}.tool-sidebar-note b{font-size:11px;color:#3448b7}.tool-sidebar-note p{margin:5px 0 0;color:#667085;font-size:10px;line-height:1.55}.page-content{margin-top:20px}.breadcrumb{display:flex;gap:6px;align-items:center;margin-bottom:11px;color:var(--text-muted);font-size:11px}.breadcrumb a:hover{color:var(--accent)}.tool-header{display:flex;justify-content:space-between;align-items:flex-start;gap:22px}.tool-header h1,.tool-header h2{margin-bottom:8px}.tool-header p{max-width:820px;margin-bottom:0;color:var(--text-secondary);font-size:13px}.actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
@media(max-width:980px){.tool-layout{grid-template-columns:1fr}.tool-sidebar{position:relative;top:0;height:auto;border-right:0;border-bottom:1px solid var(--border)}.tool-side-nav{grid-template-columns:repeat(3,minmax(0,1fr))}.tool-current-card,.tool-sidebar-note{display:none}.tool-main{padding:20px 18px 34px}.tool-header{flex-direction:column}.actions{width:100%}}
@media(max-width:620px){.tool-side-nav{grid-template-columns:repeat(2,minmax(0,1fr))}.tool-main{padding:17px 12px 28px}h1{font-size:27px}}

/* MASS Lab public integration · 2026-09-07 */
.mass-lab-app-header{height:62px;display:flex;align-items:center;justify-content:space-between;padding:0 24px;background:#08111d;color:#eef4ff;border-bottom:1px solid #1c2b3e;font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif}.mass-lab-app-brand{display:flex;align-items:baseline;gap:12px;color:inherit;text-decoration:none}.mass-lab-app-brand b{font-size:15px;letter-spacing:.04em}.mass-lab-app-brand span{font-size:11px;color:#8fa2ba}.mass-lab-app-meta{display:flex;align-items:center;gap:14px;font-size:10px;color:#71859d}.mass-lab-app-meta button,.mass-lab-app-meta a{border:1px solid #31445c;background:#0e1a29;color:#c9d8eb;border-radius:999px;padding:8px 12px;text-decoration:none;cursor:pointer}.mass-lab-app-meta button{background:#edf4ff;color:#0a1420;border-color:#edf4ff;font-weight:750}.tool-brand-sub{display:block;margin-top:5px;font-size:9px;color:var(--muted,#8b94a3);line-height:1.35}.public-limit-note p{line-height:1.65}.api-entry{white-space:nowrap}.public-limit-strip,.public-limit-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.public-limit-strip{margin:4px 0 18px}.public-limit-strip span,.public-limit-grid>div{border:1px solid #e2e6ec;border-radius:12px;background:#f8fafc;padding:12px 14px;font-size:11px;color:#667085}.public-limit-strip b,.public-limit-grid b{color:#111827}.public-limit-grid{margin-bottom:18px}.public-limit-grid>div{display:flex;flex-direction:column;gap:5px}.public-limit-grid small{font-size:8px;letter-spacing:.13em;color:#98a2b3}.public-limit-grid b{font-size:23px;letter-spacing:-.04em}.api-connect-dialog{border:0;padding:0;background:transparent;max-width:none}.api-connect-dialog::backdrop{background:rgba(5,10,18,.54);backdrop-filter:blur(8px)}.api-connect-card{width:min(760px,calc(100vw - 32px));max-height:90vh;overflow:auto;background:#fff;border:1px solid #e2e7ee;border-radius:22px;padding:24px;box-shadow:0 28px 90px rgba(0,0,0,.22);color:#101828}.api-connect-head{display:flex;gap:20px;justify-content:space-between}.api-connect-head small{font-size:9px;letter-spacing:.15em;color:#7b8797}.api-connect-head h2{margin:6px 0 8px;font-size:28px}.api-connect-head p{margin:0;max-width:600px;color:#667085;font-size:12px;line-height:1.7}.api-connect-close{border:0;background:#f2f4f7;width:34px;height:34px;border-radius:50%;cursor:pointer}.api-connect-limits{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}.api-connect-limits span{padding:7px 10px;border-radius:999px;background:#eef3f8;font-size:10px;color:#475467}.api-connect-card section{border-top:1px solid #edf0f4;padding-top:16px;margin-top:16px}.api-connect-card section h3{font-size:13px;margin:0 0 12px}.api-connect-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.api-connect-grid .full{grid-column:1/-1}.api-connect-grid label{display:flex;flex-direction:column;gap:6px;font-size:11px;color:#475467}.api-connect-grid input{border:1px solid #d6dce5;border-radius:10px;padding:11px 12px;font:inherit;color:#101828}.api-connect-status{margin-top:16px;padding:10px 12px;background:#f5f7fa;border-radius:10px;font-size:11px;color:#667085}.api-connect-status.ok{background:#eef8f0;color:#216e39}.api-connect-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:16px}.viz-public-badge{font-size:10px;color:#7d8da3;border:1px solid #26384c;border-radius:999px;padding:7px 10px;white-space:nowrap}
@media(max-width:720px){.mass-lab-app-meta>span{display:none}.public-limit-strip,.public-limit-grid,.api-connect-grid{grid-template-columns:1fr 1fr}.api-connect-grid .full{grid-column:1/-1}.viz-public-badge{display:none}}