.science-lab{--sl-ink:#172b35;--sl-teal:#087e83;--sl-muted:#64777c;max-width:1440px;color:var(--sl-ink);margin:0 auto;font-family:Arial,Microsoft YaHei,sans-serif}.sl-breadcrumb{color:var(--sl-muted);flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:30px;font-size:12px;display:flex}.sl-breadcrumb a:hover{text-decoration:underline}.sl-eyebrow{letter-spacing:1.6px;color:var(--sl-teal);align-items:center;gap:8px;margin:0 0 13px;font-size:11px;font-weight:700;display:flex}.sl-eyebrow span{color:var(--sl-muted);letter-spacing:.5px}.science-lab h1{letter-spacing:-1.6px;margin:0;font-size:clamp(28px,3.3vw,48px);font-weight:750;line-height:1.3}.science-lab h2{margin:0 0 16px;font-size:22px;font-weight:700;line-height:1.4}.science-lab h3{margin:23px 0 9px;font-size:16px;font-weight:700}.science-lab p{line-height:1.85}.sl-hero{background:#edf5f2;border:1px solid #deebe5;border-radius:20px;grid-template-columns:1fr 1fr;align-items:center;gap:30px;margin-bottom:52px;padding:46px;display:grid}.sl-hero h1{letter-spacing:-2px;font-size:clamp(38px,4.3vw,62px)}.sl-hero h1 em{color:var(--sl-teal);font-style:normal}.sl-hero>div>p:not(.sl-eyebrow){color:#526b70;margin-top:20px;font-size:15px}.sl-hero-badges{flex-wrap:wrap;gap:8px;margin-top:25px;display:flex}.sl-hero-badges span{background:#fff;border:1px solid #dce8e3;border-radius:5px;padding:5px 9px;font-size:11px}.sl-hero-art{min-width:0;transform:rotate(-2deg)}.sl-hero-art svg{border:7px solid #fff;border-radius:15px;box-shadow:0 14px 35px #244c4820}.sl-hero-art p{text-align:center;font-size:12px!important}.science-scene{aspect-ratio:800/440;width:100%;height:auto;display:block}.sl-section-heading{justify-content:space-between;align-items:end;gap:16px;margin-bottom:22px;display:flex}.sl-section-heading h2{margin:0}.sl-filters{flex-wrap:wrap;gap:4px;display:flex}.sl-filters button{border-radius:7px;min-height:44px;padding:10px 15px;font-size:13px}.sl-filters button[aria-pressed=true]{background:var(--sl-ink);color:#fff}.sl-filters button:hover{color:var(--sl-ink);background:#dcebe7}.sl-catalog{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;display:grid}.sl-card{background:#fff;border:1px solid #dfe7e6;border-radius:13px;min-width:0;transition:border-color .15s,box-shadow .15s;display:block;overflow:hidden}.sl-card:hover{border-color:#5eaaa7;box-shadow:0 5px 22px #164b4410}.sl-thumbnail{background:#0b1220;padding:12px 10px}.sl-card-body{padding:23px}.sl-card .sl-eyebrow{justify-content:space-between;font-size:10px}.sl-card h3{margin:0 0 10px;font-size:21px}.sl-card-body>p:not(.sl-eyebrow){color:var(--sl-muted);min-height:52px;margin:0;font-size:14px}.sl-card-footer{color:var(--sl-muted);border-top:1px solid #eaf0ee;justify-content:space-between;align-items:center;gap:15px;margin-top:19px;padding-top:16px;font-size:10px;display:flex}.sl-card-footer span:last-child{color:var(--sl-teal);white-space:nowrap;align-items:center;gap:7px;font-size:12px;display:flex}.sl-method{margin-top:40px}.sl-method>div{grid-template-columns:repeat(3,1fr);gap:26px;display:grid}.sl-method p{color:var(--sl-muted);font-size:13px}.sl-method strong{color:var(--sl-ink);margin-bottom:8px;display:block}.sl-panel{background:#fff;border:1px solid #dfe7e6;border-radius:13px;padding:28px}.sl-detail-heading{justify-content:space-between;align-items:start;gap:20px;margin-bottom:28px;display:flex}.sl-description{color:var(--sl-muted);margin-top:12px;font-size:15px}.sl-button{min-height:44px;color:var(--sl-ink);cursor:pointer;white-space:nowrap;background:#fff;border:1px solid #d6e2df;border-radius:7px;justify-content:center;align-items:center;gap:7px;padding:9px 13px;font-size:13px;display:inline-flex}.sl-button:hover{background:#edf5f2;border-color:#8cb8ad}.sl-primary{background:var(--sl-teal);border-color:var(--sl-teal);color:#fff}.sl-primary:hover{color:#fff;background:#066369}.sl-workbench{grid-template-columns:minmax(0,1fr) 265px;align-items:stretch;gap:20px;display:grid}.sl-viewer{background:#fff;border:1px solid #dce5e2;border-radius:13px;min-width:0;overflow:hidden}.sl-stage-top{color:#cbd5e1;background:#0b1220;justify-content:space-between;align-items:center;gap:12px;min-height:47px;padding:10px 18px;font-size:11px;display:flex}.sl-status-dot{background:#67e8f9;border-radius:50%;width:6px;height:6px;margin-right:7px;display:inline-block}.sl-text-button{color:#67e8f9;cursor:pointer;white-space:nowrap;min-height:32px;padding:3px 6px}.sl-stage{background:#0b1220;overflow-x:auto}.sl-stage.sl-zoomed .science-scene{min-width:800px}.sl-transport{padding:17px 20px 10px}.sl-buttons{flex-wrap:wrap;align-items:center;gap:7px;margin-bottom:14px;display:flex}.sl-speed{color:var(--sl-muted);align-items:center;gap:7px;margin-left:auto;font-size:12px;display:flex}.sl-speed select{background:#fff;border:1px solid #dce5e2;border-radius:6px;min-height:40px;padding:3px 6px}.sl-range-label{font-size:12px;display:block}.sl-range-label>span{justify-content:space-between;align-items:center;gap:10px;display:flex}.sl-range-label output{font-variant-numeric:tabular-nums;color:var(--sl-teal);font-weight:700}.sl-range-label input{width:100%;accent-color:var(--sl-teal);cursor:pointer;min-height:32px}.sl-milestones{justify-content:space-between;display:flex}.sl-milestones button{color:var(--sl-muted);min-height:36px;padding:0 5px;font-size:10px}.sl-controls{background:#f4f8f6;border:1px solid #dfe7e6;border-radius:13px;min-width:0;padding:23px 20px}.sl-controls h2{font-size:19px}.sl-param{margin-top:25px}.sl-hint{color:var(--sl-muted);font-size:12px;line-height:1.85}.sl-controls .sl-hint{margin-top:10px}.sl-controls h3{margin-top:26px;font-size:13px}.sl-observations{margin:10px 0 25px;padding:0;list-style:none}.sl-observations li{color:var(--sl-muted);border-bottom:1px solid #e0e9e5;gap:10px;padding:11px 0;font-size:12px;line-height:1.8;display:flex}.sl-observations li>span{color:#839993;font-size:11px}.sl-observations li[data-active=true]{color:var(--sl-ink);font-weight:600}.sl-observations li[data-active=true]>span{color:var(--sl-teal)}.sl-downloads{gap:8px;display:grid}.sl-feedback{min-height:24px}.sl-explain-grid{grid-template-columns:1fr 1fr;gap:20px;margin-top:24px;display:grid}.sl-panel>p:not(.sl-eyebrow){color:#50666c;font-size:14px}.sl-formula{overflow-wrap:anywhere;background:#edf5f2;border-radius:8px;margin-top:20px;padding:16px;font:13px/1.9 monospace}.sl-code-ref{overflow-wrap:anywhere;background:#f4f7f6;border-radius:7px;margin-top:15px;padding:12px;font:11px/1.8 monospace!important}.sl-answer{border-top:1px solid #e0e9e5;margin-top:15px;padding-top:12px;font-size:13px}.sl-answer summary{cursor:pointer;color:var(--sl-teal);min-height:32px}.sl-answer p{color:var(--sl-muted)}.sl-source{grid-template-columns:1.4fr 1fr;gap:30px;margin-top:24px;display:grid}.sl-source p{color:var(--sl-muted);font-size:13px}.sl-source a{color:var(--sl-teal);overflow-wrap:anywhere;flex-direction:column;align-self:center;align-items:start;gap:7px;font-size:14px;line-height:1.7;display:flex}.sl-source a span{color:var(--sl-muted);font-size:11px}.sl-next{justify-content:space-between;align-items:center;gap:15px;margin-top:25px;margin-bottom:20px;display:flex}.sl-notice{background:#fff7d6;border-radius:8px;margin-bottom:20px;padding:15px}.science-lab button:focus-visible,.science-lab a:focus-visible,.science-lab input:focus-visible,.science-lab select:focus-visible,.sl-stage:focus-visible{outline-offset:3px;outline:3px solid #13a7a7}.sl-readout{color:#24545b;font-variant-numeric:tabular-nums;background:#edf5f2;border-bottom:1px solid #dce5e2;gap:5px;padding:13px 20px;font-size:12px;line-height:1.8;display:grid}.sl-readout span{color:#64777c;font-size:11px}@media (min-width:1700px){.sl-catalog{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (max-width:1200px){.sl-workbench{grid-template-columns:minmax(0,1fr)}.sl-controls{grid-template-columns:1fr 1fr;gap:0 25px;display:grid}.sl-controls>.sl-eyebrow,.sl-controls>h2{grid-column:1/-1}.sl-controls .sl-param{margin-top:5px}.sl-observations{grid-area:3/2/7}.sl-controls>h3{grid-area:2/2;margin:0 0 14px}.sl-downloads{grid-column:1/-1;grid-template-columns:1fr 1fr}.sl-controls>.sl-feedback{grid-column:1/-1}.sl-hero{gap:15px;padding:30px}}@media (max-width:640px){.science-lab{margin:-4px -8px 0}.sl-breadcrumb{margin-bottom:20px}.sl-hero{grid-template-columns:1fr;gap:25px;margin-bottom:30px;padding:25px 21px}.sl-hero-art{transform:none}.sl-hero h1{font-size:40px}.sl-hero-art p{margin-top:8px!important}.sl-section-heading{flex-direction:column;align-items:start}.sl-catalog{grid-template-columns:1fr;gap:20px}.sl-card-body{padding:20px}.sl-method>div,.sl-explain-grid,.sl-source{grid-template-columns:1fr}.sl-panel{padding:22px}.sl-detail-heading{flex-direction:column}.science-lab h1{letter-spacing:-.8px}.sl-detail-heading h1{font-size:28px}.sl-controls{padding:22px;display:block}.sl-controls>h3{margin-top:24px}.sl-downloads{grid-template-columns:1fr}.sl-buttons{gap:6px}.sl-buttons .sl-button{padding:8px 10px;font-size:12px}.sl-speed{margin-left:0}.sl-transport{padding:15px 12px 8px}.sl-stage-top{padding:8px 12px;font-size:10px}.sl-source{gap:20px}.sl-card h3{font-size:20px}.sl-hero-badges{gap:5px}.sl-hero-badges span{font-size:10px}.sl-formula{font-size:12px}.sl-method{margin-top:25px}}@media (prefers-reduced-motion:reduce){.sl-card{transition:none}}
.gk-lab{max-width:1440px}.gk-hero{background:#edf5f2;border-radius:18px;margin-bottom:25px;padding:42px}.gk-hero>p:not(.sl-eyebrow){color:#526b70;margin-top:20px;font-size:15px}.gk-criteria{margin-bottom:25px}.gk-criteria p{color:#50666c;font-size:14px}.gk-catalog{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:15px;display:grid}.gk-card{padding:23px;position:relative}.gk-card h2{min-height:64px;margin-top:15px;font-size:20px;line-height:1.6}.gk-card>p:not(.sl-eyebrow){color:#64777c;min-height:85px;font-size:13px}.gk-number{color:#d6e8e2;font:38px/1 monospace}.gk-card-bottom{color:#087e83;border-top:1px solid #e0e9e5;justify-content:space-between;align-items:center;margin-top:20px;padding-top:15px;font-size:11px;display:flex}.gk-search{background:#fff;border:1px solid #d6e2df;border-radius:7px;min-width:240px;min-height:44px;padding:10px 14px;font-size:13px}.gk-question{margin-bottom:24px}.gk-question p{white-space:pre-wrap;line-height:2!important}.gk-question details{margin-top:15px}.gk-question summary,.gk-solution summary{cursor:pointer;color:#087e83;min-height:42px;font-size:14px;line-height:1.8}.gk-options{grid-template-columns:1fr 1fr;gap:10px;margin:20px 0;list-style:none;display:grid}.gk-options li{background:#f4f8f6;border-radius:7px;padding:12px 15px;font-size:14px;line-height:1.9}.gk-original img{border:1px solid #dce5e2;width:100%;max-width:900px;height:auto;margin:15px auto}.gk-selection{grid-template-columns:1fr 1fr;gap:25px;margin:20px 0 30px;display:grid}.gk-selection section{border-left:3px solid #8cb8ad;padding:8px 20px}.gk-selection p:not(.sl-eyebrow){color:#526b70;font-size:13px}.gk-selection h2{font-size:19px}.gk-solution,.gk-sources{margin-top:24px}.gk-solution h2{margin-top:20px;font-size:19px;line-height:1.9}.gk-solution p{color:#50666c;font-size:14px;line-height:2}.gk-sources div{flex-wrap:wrap;gap:10px;margin-top:16px;display:flex}.gk-sources p{font-size:12px!important}.gk-zoomed svg{min-width:800px}.gk-correction{background:#fff8e2;border-left:3px solid #ce9b29;padding:15px}.gk-lab .sl-buttons select{border:1px solid #d6e2df;border-radius:7px;min-height:44px;padding:7px}.gk-lab .sl-explain-grid p{line-height:2}.gk-lab .sl-formula>div+div{margin-top:10px}.gk-lab .sl-controls{display:block}.gk-lab .sl-controls .sl-param{margin-top:20px}@media (max-width:1200px){.gk-catalog{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:640px){.gk-hero{padding:25px 21px}.gk-hero h1{font-size:31px}.gk-catalog,.gk-selection,.gk-options{grid-template-columns:1fr}.gk-search{width:100%;min-width:0}.gk-card h2,.gk-card>p:not(.sl-eyebrow){min-height:0}.gk-selection{gap:16px}.gk-card{padding:22px}.gk-lab .sl-workbench{gap:20px}.gk-question{padding:21px}.gk-hero-badges{font-size:10px}}
