:root{--blue:#315de8;--blue-dark:#2149c6;--ink:#202b40;--muted:#8a94a6;--line:#e9ecf2;--paper:#fff;--bg:#f6f8fb;--font:-apple-system,BlinkMacSystemFont,'SF Pro Text','PingFang SC','Hiragino Sans GB','Microsoft YaHei','Segoe UI',sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:13px;-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button{transition:background .16s,color .16s,box-shadow .16s,transform .16s}button:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid #98b4ff;outline-offset:3px}button:disabled{cursor:default;opacity:.35}a{color:inherit;text-decoration:none}.topbar{height:81px;border-bottom:1px solid #e5eaf1;background:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 max(4.4vw,24px)}.brand{display:flex;gap:11px;align-items:center;font-size:17px;font-weight:650;letter-spacing:.4px}.brand-mark{width:39px;height:39px;background:var(--blue);color:#fff;border-radius:11px;display:grid;place-items:center;box-shadow:0 4px 8px #315de815}.brand-mark svg{width:27px;height:27px;transform:translateY(-2px)}.brand-en{font-size:9px;letter-spacing:2.5px;display:block;color:#919aac;margin-top:3px}.header-right{display:flex;align-items:center;gap:29px}.workspace-indicator{display:flex;gap:8px;align-items:center;color:#717c8d;font-size:12px}.workspace-indicator>span{width:5px;height:5px;border-radius:50%;background:#72829a}.help-btn{display:flex;align-items:center;gap:7px;padding:7px 0;border:0;background:transparent;color:#637086;font-size:12px}.help-btn:hover{color:var(--blue)}.circle-question{border:1.4px solid #a0aabb;border-radius:50%;width:15px;height:15px;font-size:11px;display:grid;place-items:center;line-height:1}.avatar{display:grid;place-items:center;background:#eef1fa;border:3px solid #f8f9fd;border-radius:50%;font-size:11px;font-weight:700;color:#5e77a7;width:34px;height:34px}main{max-width:1480px;margin:0 auto;padding:40px max(4.4vw,24px) 0}.page-heading{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:30px}.eyebrow{font-size:10px;font-weight:650;letter-spacing:2.1px;color:#8b98b0}.page-heading h1{font-size:30px;font-weight:650;letter-spacing:-.8px;margin:10px 0 10px;line-height:1.4}.title-dot{color:var(--blue)}.page-heading p{margin:0;color:#8791a3;font-size:12px;letter-spacing:.3px}.local-note{display:flex;align-items:center;gap:7px;font-size:11px;color:#8b95a6;margin-bottom:3px}.status-dot{background:#4da785;width:5px;height:5px;border-radius:50%}.workspace{display:grid;grid-template-columns:309px minmax(0,1fr);gap:24px;align-items:start}.settings-panel{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 3px 7px #23304b03;overflow:hidden}.panel-heading{height:62px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding:0 23px}h2,h3{margin:0}h2{font-size:15px;font-weight:600}.panel-heading h2{display:flex;align-items:center;gap:9px}.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.panel-heading h2 .icon{width:17px;height:17px;color:#79879f}.text-button{border:0;background:transparent;color:#8e99ab;font-size:11px;padding:7px 0 7px 8px}.text-button:hover{color:var(--blue)}form{padding:0 23px 19px}.form-section{padding:22px 0;border-bottom:1px solid var(--line)}.section-heading{display:flex;align-items:center;margin-bottom:19px;gap:9px}.section-icon{color:#687c9b;display:flex}.section-icon .icon{width:19px;height:19px}.section-heading h3{font-size:13px;font-weight:600;letter-spacing:.2px}.unit-badge{font-size:10px;color:#97a1b3;background:#f5f7fa;border-radius:4px;padding:2px 5px;margin-left:auto}.input-grid{display:grid;gap:9px}.input-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.input-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.input-grid label,.select-label,.height-label{display:block;color:#8590a3;font-size:11px}.input-grid input{margin-top:7px}input[type=number]{width:100%;height:40px;border:1px solid #e1e6ef;border-radius:7px;padding:0 11px;font-size:14px;font-weight:500;color:#34435c;background:#fff;outline:none;transition:border .2s,box-shadow .2s;-moz-appearance:textfield}input[type=number]::-webkit-inner-spin-button{display:none}input[type=number]:focus{border-color:#6b8af2;box-shadow:0 0 0 3px #315de810}input[aria-invalid=true]{border-color:#d45e64;background:#fffafa}.dimension-note{margin-top:12px;color:#a0a8b7;font-size:10px;display:flex;align-items:center;gap:5px}.tiny-line{width:10px;height:7px;border-left:1px solid #99a8c1;border-bottom:1px solid #99a8c1;margin-right:3px}.select-wrap{position:relative;margin:7px 0 13px}.select-wrap select{width:100%;height:39px;border:1px solid #e1e6ef;border-radius:7px;appearance:none;padding:0 29px 0 11px;outline:none;color:#55627a;font-size:11px;background:#fff;cursor:pointer}.select-wrap select:focus{border-color:#6b8af2}.select-wrap>.icon{position:absolute;right:10px;top:11px;width:15px;height:15px;pointer-events:none;color:#99a4b7}.height-label{margin:17px 0 7px;display:flex;align-items:center;justify-content:space-between}.input-unit{font-size:10px;color:#a2aab8}.field-hint{font-size:10px;color:#a2aaba;margin:8px 0 0}.options-section{padding:20px 0 18px;border-bottom:0}.check-row{display:flex;align-items:center;font-size:11px;color:#5c6980;gap:9px;cursor:pointer}.check-row input{position:absolute;opacity:0;pointer-events:none}.checkbox-ui{display:grid;place-items:center;width:16px;height:16px;border:1px solid #d5dce7;border-radius:4px;flex-shrink:0}.checkbox-ui svg{width:12px;height:12px;stroke:white;stroke-width:1.8;fill:none;opacity:0}.check-row input:checked+.checkbox-ui{background:var(--blue);border-color:var(--blue)}.check-row input:checked+.checkbox-ui svg{opacity:1}.check-row input:focus-visible+.checkbox-ui{outline:3px solid #a6bdff;outline-offset:3px}details{margin-top:21px}summary{list-style:none;cursor:pointer;display:flex;align-items:center;color:#7d8ba0;font-size:11px;gap:6px}summary::-webkit-details-marker{display:none}summary .icon{width:15px;height:15px;margin-left:auto;transition:transform .2s}details[open] summary .icon{transform:rotate(180deg)}.advanced-meta{color:#abb3c0;font-size:10px}.advanced-inputs{padding-top:13px}.calculate-button{width:100%;height:43px;border:0;border-radius:8px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;gap:8px;font-size:12px;font-weight:500;box-shadow:0 4px 8px #315de81c}.calculate-button:hover{background:var(--blue-dark);box-shadow:0 5px 12px #315de830}.calculate-button:active{transform:translateY(1px)}.calculate-button .icon{width:18px;height:18px}.calculate-button .arrow{margin-left:19px;width:17px;height:17px}.auto-hint{text-align:center;color:#a4acba;font-size:10px;margin:10px 0 0}.form-error{color:#ba4d53;background:#fff2f2;padding:9px 10px;font-size:11px;border-radius:5px;margin:0 0 13px;line-height:1.7}.results-column{min-width:0}.result-card{background:white;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 3px 7px #23304b03}.result-heading{display:flex;justify-content:space-between;align-items:center;height:62px;padding:0 24px;border-bottom:1px solid var(--line)}.result-title,.result-actions{display:flex;align-items:center}.result-title{gap:10px}.result-badge{color:#4574d2;background:#edf3ff;font-size:9px;font-weight:500;border-radius:4px;padding:4px 7px}.result-actions{gap:12px}.segmented{background:#f4f6fa;padding:3px;border-radius:6px;display:flex;gap:1px}.segmented button{height:26px;background:transparent;border:0;border-radius:4px;font-size:10px;color:#98a1b2;padding:0 11px}.segmented button.active{background:white;color:#4267c9;box-shadow:0 1px 4px #1f315213;font-weight:500}.icon-button{width:27px;height:28px;display:grid;place-items:center;color:#8995aa;border:0;border-radius:5px;background:transparent}.icon-button .icon{width:17px;height:17px}.icon-button:hover{background:#eff3fc;color:var(--blue)}.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));padding:24px 26px 23px}.metric{padding-left:28px;border-left:1px solid var(--line)}.metric:first-child{padding-left:0;border-left:0}.metric-label{display:flex;align-items:center;gap:5px;font-size:11px;color:#8a94a6;margin-bottom:9px}.small-info{width:12px;height:12px;stroke:#a9b3c3;fill:none;stroke-width:1.2}.metric strong{font-size:36px;font-weight:650;letter-spacing:-1.2px;line-height:1.2;font-family:var(--font)}.metric-unit{font-size:10px;color:#9ca6b8;margin-left:7px;white-space:nowrap}.blue-text{color:var(--blue)}.percent{font-size:21px;letter-spacing:-.5px;margin-left:2px}.metric-detail{display:block;font-size:10px;color:#9ba5b6;margin-top:9px;white-space:nowrap}.util-bar{height:4px;background:#eef2fa;border-radius:4px;max-width:138px;margin-top:15px;overflow:hidden}.util-bar span{display:block;height:100%;border-radius:4px;background:#6088ef;transition:width .3s}.visualization{margin:0 22px;border:1px solid #e9eef5;border-radius:9px;position:relative;overflow:hidden;background-color:#f8fafd;background-image:radial-gradient(#bdcadd70 .7px,transparent .7px);background-size:17px 17px;min-height:340px}.canvas-topline{display:flex;align-items:center;justify-content:space-between;height:43px;padding:0 15px;position:relative;z-index:1}.canvas-label{display:flex;align-items:center;gap:6px;color:#8492aa;font-size:10px}.canvas-label>span:first-child{width:5px;height:5px;background:#9baccc;border-radius:50%}.canvas-tools{display:flex;align-items:center;gap:11px}.canvas-button{display:flex;gap:5px;align-items:center;border:0;background:transparent;color:#91a0b9;padding:4px;font-size:12px}.canvas-button span{font-size:9px}.canvas-button[aria-pressed=true]{color:#5074c5}.scale-label{font-size:9px;color:#a1aec2}.drawing{height:290px;width:100%;display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}.drawing>svg{width:100%;height:100%;overflow:visible}.canvas-bottomline{height:38px;padding:0 15px;display:flex;align-items:center;justify-content:space-between}.legend{display:flex;align-items:center;gap:16px;font-size:9px;color:#8f9cb0}.legend span{display:flex;align-items:center;gap:5px}.legend i{width:8px;height:8px;border-radius:2px;display:inline-block}.legend-normal{background:#b9cdf7;border:1px solid #6b94e6}.legend-rotated{background:#e9ceb0;border:1px solid #cda776}.legend-empty{background:#f1f4f8;border:1px solid #cdd7e5}.canvas-footnote{font-size:9px;color:#a6b0c2}.layer-bar{height:59px;display:flex;justify-content:space-between;align-items:center;padding:0 25px}.layer-nav{display:flex;align-items:center;gap:7px;font-size:10px}.layer-icon{display:flex;color:#a0aec7;margin-right:2px}.layer-icon .icon{width:16px;height:16px}.layer-nav strong{font-weight:500;color:#6f809d}.layer-muted{color:#a6afbf;font-size:10px;margin-right:9px}.layer-arrow{display:flex;border:1px solid #e6ebf3;border-radius:4px;width:21px;height:21px;align-items:center;justify-content:center;background:white;color:#9ba9bd;padding:0}.layer-arrow .icon{width:12px;height:12px}.layer-arrow:hover:enabled{background:#eef3ff;color:var(--blue)}.layer-repeat{font-size:9px;color:#a8b2c2}.comparison-section{margin-top:24px}.comparison-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.comparison-heading h2{font-size:13px}.comparison-heading>span{font-size:10px;color:#a0aabc}.layout-cards{display:grid;grid-template-columns:repeat(var(--candidate-cols,3),minmax(0,1fr));gap:11px}.layout-card{position:relative;display:grid;grid-template-columns:64px 1fr;align-items:center;gap:10px;text-align:left;min-height:98px;border:1px solid #e5eaf2;border-radius:9px;padding:15px 12px;background:white;color:var(--ink);overflow:hidden}.layout-card:hover{border-color:#9bb4f5;box-shadow:0 3px 9px #315de80b}.layout-card.selected{background:#f3f6ff;border-color:#6c90ec;box-shadow:0 0 0 1px #6c90ec05}.layout-mini{width:64px;height:57px;display:flex;align-items:center;justify-content:center}.layout-mini svg{width:100%;height:100%}.layout-name{font-size:11px;font-weight:500;margin-bottom:7px;white-space:nowrap}.layout-numbers{font-size:10px;color:#91a0b6;white-space:nowrap}.layout-numbers b{font-size:15px;color:#61718d;font-weight:650;margin-right:2px}.layout-card.selected .layout-numbers b{color:var(--blue)}.layout-numbers .mini-divider{margin:0 5px;color:#c3cbd9}.selection-check{width:15px;height:15px;position:absolute;right:6px;top:6px;background:var(--blue);border-radius:50%;display:grid;place-items:center;color:white}.selection-check svg{width:9px;height:9px;stroke:currentColor;stroke-width:2;fill:none}.insight{display:flex;align-items:center;gap:10px;margin-top:17px;background:#edf3fe;border:1px solid #e6edfb;border-radius:8px;padding:11px 14px;color:#7f94bc}.insight-icon{display:flex;color:#7092d5}.insight .icon{width:16px;height:16px}.insight p{font-size:10px;line-height:1.8;margin:0}.insight b{font-weight:500;color:#557bbf}footer{display:flex;justify-content:space-between;align-items:center;padding:27px 0 23px;color:#b0b8c6;font-size:9px;gap:12px}footer>span:first-child{display:flex;align-items:center;gap:5px}.footer-mark{font-size:20px;line-height:1;color:#99a8c1}.footer-help{border:0;background:transparent;color:#9aa8bd;font-size:9px;padding:0;margin-left:10px}.footer-help:hover{color:var(--blue)}dialog{border:1px solid #e4eaf4;border-radius:18px;padding:28px;max-width:510px;width:calc(100% - 32px);color:var(--ink);box-shadow:0 24px 100px #192b4b30}dialog::backdrop{background:#15294e55;backdrop-filter:blur(4px)}.dialog-heading{display:flex;align-items:center;justify-content:space-between}.dialog-heading .icon-button{font-size:25px}dialog h2{font-size:21px;margin:14px 0 18px}dialog p{font-size:12px;color:#7c8ba3;line-height:1.9}.formula{padding:12px 0;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:7px;font-size:11px}.formula strong{font-weight:500;color:#5975b0}.formula span{color:#939eb0}.dialog-note{font-size:10px!important;background:#f5f7fb;border-radius:7px;padding:10px 12px}dialog .calculate-button{margin-top:18px}.toast{position:fixed;left:50%;bottom:30px;transform:translate(-50%,20px);padding:11px 19px;border-radius:9px;background:#24344eea;backdrop-filter:blur(8px);color:white;font-size:12px;box-shadow:0 8px 25px #14254d22;opacity:0;pointer-events:none;transition:all .2s;z-index:20}.toast.show{opacity:1;transform:translate(-50%,0)}.empty-state{text-align:center;padding:20px;color:#9caac0}.empty-state svg{width:43px;height:43px;margin-bottom:8px;color:#bdcbe2}.empty-state strong{font-size:13px;font-weight:500;display:block;color:#8292ae}.empty-state p{font-size:10px;line-height:1.8;margin-top:7px}.dim-label{font-family:var(--font);fill:#8f9fba;font-size:12px;font-weight:500}.box-number{font-family:var(--font);font-weight:600}.result-card.invalid .metrics,.result-card.invalid .visualization,.result-card.invalid .layer-bar{opacity:.38}.result-card.invalid #drawing{filter:grayscale(1)}
@media(min-width:1550px){main{padding-left:55px;padding-right:55px}.topbar{padding-left:calc((100vw - 1370px)/2);padding-right:calc((100vw - 1370px)/2)}.drawing{height:330px}.workspace{grid-template-columns:320px minmax(0,1fr)}}
@media(max-width:1120px){main{padding:30px 28px 0}.topbar{padding:0 28px}.workspace{grid-template-columns:280px minmax(0,1fr);gap:18px}form{padding-left:18px;padding-right:18px}.panel-heading{padding:0 18px}.metrics{padding:22px 20px}.metric{padding-left:18px}.metric strong{font-size:32px}.metric-unit{font-size:9px;margin-left:4px}.metric-detail{font-size:9px}.layout-cards{gap:8px}.layout-card{grid-template-columns:48px 1fr;padding:16px 8px;gap:6px}.layout-mini{width:48px;height:48px}.layout-name{font-size:10px}.layout-numbers{font-size:9px}.layout-numbers b{font-size:13px}.layout-numbers .mini-divider{margin:0 2px}.visualization{margin:0 16px}.result-heading{padding:0 20px}.local-note{display:none}.drawing{height:282px}.legend{gap:9px}.layer-bar{padding:0 18px}}
@media(max-width:900px){main{padding:28px 20px 0}.topbar{height:72px;padding:0 22px}.workspace{grid-template-columns:252px minmax(0,1fr);gap:15px}.metric{padding-left:12px}.metrics{padding:21px 15px}.metric-label{font-size:9px}.metric strong{font-size:29px}.metric-unit{display:block;margin:4px 0 0}.metric-detail{font-size:8px;white-space:normal;line-height:1.6}.util-bar{margin-top:21px;width:75%}.result-heading{padding:0 15px}.result-badge{font-size:8px;padding:3px 5px}.result-title{gap:6px}.result-actions{gap:4px}.segmented button{padding:0 7px}.result-title h2{font-size:13px}.layout-cards{grid-template-columns:1fr}.layout-card{grid-template-columns:60px 1fr;min-height:72px;padding:8px 14px;gap:15px}.layout-mini{width:60px;height:52px}.layout-name{font-size:11px;margin-bottom:5px}.layout-numbers{font-size:10px}.layout-card .selection-check{right:15px;top:calc(50% - 8px)}.comparison-section{margin-top:19px}.layer-repeat{display:none}.canvas-tools{gap:5px}.scale-label{display:none}.legend{font-size:8px;gap:9px}.canvas-footnote{display:none}.drawing{height:270px}.visualization{min-height:0}.page-heading h1{font-size:27px}footer>span:last-child{font-size:8px}.footer-help{display:none}}
@media(max-width:680px){.topbar{height:67px;padding:0 18px}.brand{font-size:15px;gap:8px}.brand-mark{width:34px;height:34px;border-radius:9px}.brand-mark svg{width:24px;height:24px}.brand-en{font-size:8px;letter-spacing:2px}.workspace-indicator{display:none}.avatar{display:none}.header-right{gap:15px}.help-btn{font-size:11px}main{padding:26px 16px 0}.page-heading{margin-bottom:23px}.eyebrow{font-size:8px;letter-spacing:1.7px}.page-heading h1{font-size:24px;letter-spacing:-.7px;margin:9px 0}.page-heading p{font-size:10px;line-height:1.8}.workspace{grid-template-columns:1fr;gap:20px}.settings-panel{border-radius:12px}.panel-heading{height:53px}.panel-heading h2{font-size:13px}form{display:grid;grid-template-columns:1fr 1fr;gap:0 18px;padding:0 18px 16px}.form-section{padding:18px 0}.form-section:first-child{border-bottom:0}.form-section:nth-child(2){border-bottom:0;border-left:1px solid var(--line);padding-left:18px;margin-left:-1px}.section-heading{margin-bottom:15px}.section-heading h3{font-size:11px}.section-heading{gap:6px}.section-icon .icon{width:17px;height:17px}.input-grid.three{grid-template-columns:1fr}.input-grid.three label{display:grid;grid-template-columns:48px 1fr;align-items:center}.input-grid.three input{margin-top:0}.input-grid.two{gap:7px}.input-grid label{font-size:9px}input[type=number]{height:36px;font-size:12px;padding:0 8px}.dimension-note{font-size:8px;line-height:1.8;gap:2px;margin-top:12px}.select-label{font-size:9px}.select-wrap{margin-bottom:10px}.select-wrap select{font-size:9px;height:35px;padding-left:7px;padding-right:21px}.select-wrap>.icon{right:5px;top:10px;width:13px;height:13px}.height-label{font-size:9px;margin-top:10px}.field-hint{font-size:8px;margin-top:6px}.options-section{grid-column:1/-1;padding:16px 0;border-top:1px solid var(--line);display:block}.options-section details{margin-top:13px}.options-section .check-row{font-size:10px}.advanced-inputs{max-width:320px}.calculate-button,.auto-hint,.form-error{grid-column:1/-1}.auto-hint{margin:9px 0 0;font-size:9px}.calculate-button{height:41px}.metrics{padding:22px 18px 23px}.metric{padding-left:16px}.metric strong{font-size:32px}.metric-unit{display:inline;margin-left:4px;font-size:8px}.metric-detail{font-size:8px;line-height:1.7;min-height:14px;white-space:nowrap}.util-bar{margin-top:14px;max-width:90px}.result-heading{height:56px;padding:0 18px}.result-title h2{font-size:14px}.result-badge{margin-left:3px}.result-actions{gap:8px}.segmented button{font-size:9px;padding:0 9px}.visualization{margin:0 13px}.drawing{height:275px}.canvas-topline{height:37px;padding:0 12px}.canvas-label{font-size:9px}.canvas-bottomline{height:33px;padding:0 12px}.legend{font-size:8px;gap:13px}.canvas-footnote{display:block;font-size:8px}.layer-bar{height:53px}.layer-repeat{display:block;font-size:8px}.comparison-heading h2{font-size:12px}.comparison-heading>span{font-size:9px}.layout-cards{grid-template-columns:repeat(var(--candidate-cols,3),minmax(0,1fr));gap:8px}.layout-card{display:flex;flex-direction:column;align-items:flex-start;gap:7px;padding:12px 10px;min-height:123px}.layout-mini{width:55px;height:45px;align-self:center}.layout-name{font-size:10px}.layout-numbers{font-size:9px;white-space:nowrap}.layout-numbers b{font-size:13px}.layout-card .selection-check{right:5px;top:5px;width:13px;height:13px}.insight{margin-top:13px;padding:10px 12px}.insight p{font-size:9px}footer{padding:23px 0;align-items:flex-start;gap:13px;flex-direction:column;font-size:9px}footer>span:last-child{font-size:8px}.toast{font-size:11px;white-space:nowrap}dialog{padding:22px}.dialog-heading .eyebrow{font-size:9px}dialog h2{font-size:19px}}
@media(max-width:370px){main{padding-left:12px;padding-right:12px}form{gap:0 12px;padding-left:14px;padding-right:14px}.form-section:nth-child(2){padding-left:12px}.metrics{padding-left:14px;padding-right:14px}.metric{padding-left:11px}.metric strong{font-size:29px}.metric-unit{display:block;margin:3px 0}.metric-detail{white-space:normal}.util-bar{margin-top:24px}.result-actions{gap:4px}.result-badge{display:none}.layout-card{padding:12px 8px}.layout-numbers{font-size:8px}.layer-repeat{display:none}.canvas-footnote{display:none}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}} 

.back-link{font-size:12px;color:#637086;margin-right:4px;white-space:nowrap}.back-link:hover{color:var(--blue)}