:root{--bg:#f4f2ec;--paper:#fffefb;--ink:#202d37;--muted:#61717b;--line:#dbe1dd;--green:#477b70;--blue:#396c8b;--model:#718bac;--amber:#997334}
/* Desktop presentation pass; keep four-stage structure and existing actions. */
@media (min-width:1041px) {
  body main { max-width:none; padding:30px clamp(28px,3vw,48px) 48px; }
  body main > * { max-width:1220px; margin-left:auto; margin-right:auto; }
  body .page-header { margin-bottom:26px; }
  body h1 { font-size:34px; line-height:1.3; letter-spacing:-.025em; margin-top:0; }
  body .annual { padding:22px 24px; border-radius:14px; border-color:#dfe1db; }
  body .section-heading h2 { font-size:20px; }
  body .section-heading > span { font-size:12px; }
  body .stage { padding:18px 15px 16px; border-radius:10px; box-shadow:0 3px 12px #18202806; }
  body .stage header small, body .entry-label, body .origin-branch > small,
  body .origin-branch > p, body .project-note, body .model-reference > span,
  body .model-reference > small, body .material-compact > div > small,
  body .stage-primary p, body .stage-conclusion, body .domestic-path span { font-size:12px; line-height:1.65; }
  body .origin-branch { padding:12px; border-color:#dce6df; }
  body .origin-branch > strong { font-size:24px; font-variant-numeric:tabular-nums; }
  body .origin-branch > strong > small, body .model-reference b small,
  body .material-compact b small, body .stage-primary strong small { font-size:11px; }
  body .stage-primary > strong { font-size:27px; }
  body .origin-branch > strong, body .stage-primary > strong,
  body .model-reference > b, body .material-compact > div > b { white-space:normal; }
  body .model-reference { padding:12px; background:#f0f4f7; margin:12px 0; }
  body .model-reference > b { font-size:20px; font-variant-numeric:tabular-nums; }
  body .stage-actions { gap:8px; }
  body .detail-trigger, body .detail-trigger .trigger-label { font-size:12px; line-height:1.6; }
  body .detail-trigger { padding:9px 10px; min-height:38px; }
  body .trigger-label small { font-size:11px; }
  body .bridge-notes { font-size:12px; line-height:1.6; padding-top:14px; padding-bottom:18px; }
  body .detail-panel { border-color:#c9d9d2; padding:24px; }
  body .detail-grid .note, body .detail-hero p, body .method-grid p,
  body .bar-row > small, body .comparison-title p { font-size:12px; line-height:1.7; }
  body .detail-grid table { font-size:12px; }
  body .detail-grid th { font-size:11px; }
  body .e2-comparison { padding:24px; }
}
.sidebar.pinned{width:184px;box-shadow:8px 0 24px #10212a22}.sidebar.pinned a span{opacity:1}.sidebar.pinned ~ main{margin-left:184px}
.stage-primary .battery-lce-equivalent{margin:8px 0}.battery-lce-equivalent>b{display:block;color:var(--blue);font-size:18px;line-height:1.4}.battery-lce-equivalent>b>small{margin-left:4px;font-size:10px;font-weight:400}.battery-lce-equivalent>small{display:block;font-size:10px;margin-top:3px}
.monthly-context{font-size:12px;color:var(--muted);line-height:1.7;margin:10px 0}.comparison-method{margin-top:12px}.comparison-method p{font-size:11px;color:var(--muted);margin:8px 0}.bilateral>div>b{min-width:0}.bilateral>div>b>small{font-weight:400;margin:0 0 4px}.model-reference>b{white-space:normal}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;font-size:14px;line-height:1.55}button,a,summary{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}a{color:inherit}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #90b7c9;outline-offset:3px}button{color:inherit}h1,h2,h3,h4,p{margin:0}small{font-size:11px;color:var(--muted)}em{font-style:normal;font-size:10px;padding:2px 5px;background:#f7edda;border-radius:4px;color:#835e24}main{max-width:1660px;margin:0 auto 0 56px;padding:28px 36px 24px}.sidebar{position:fixed;inset:0 auto 0 0;width:56px;padding:12px 8px;background:#14212b;color:#d5e1e7;z-index:20;overflow:hidden;transition:width .18s}.sidebar:hover,.sidebar:focus-within,.sidebar.expanded{width:184px;box-shadow:8px 0 24px #10212a22}.sidebar button{width:38px;height:34px;background:transparent;color:#d5e1e7;border:1px solid #ffffff22;border-radius:8px;margin-bottom:18px}.sidebar nav{display:grid;gap:8px}.sidebar a{display:flex;align-items:center;gap:10px;height:42px;text-decoration:none;white-space:nowrap;border-radius:8px;padding:5px}.sidebar a:hover{background:#ffffff14}.sidebar a.selected{background:#e6f0ef;color:#1f454d}.sidebar a b{width:28px;flex-shrink:0;text-align:center;font-size:11px}.sidebar a span{font-size:12px;opacity:0}.sidebar:hover a span,.sidebar:focus-within a span,.sidebar.expanded a span{opacity:1}.page-header{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-bottom:24px}.trial-label{font-size:11px;color:#758079;letter-spacing:.1em}h1{font-size:34px;letter-spacing:-.03em;line-height:1.3;margin-top:4px}.compare-links{display:flex;gap:8px}.compare-links a{font-size:12px;text-decoration:none;border:1px solid #cfd7d2;border-radius:7px;padding:7px 12px}.compare-links a:hover{background:#fff}.annual{background:#edece5;border:1px solid #dddfd5;border-radius:12px;padding:16px 20px;margin-bottom:26px}.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:16px}.section-heading h2{font-size:17px}.section-heading>span{font-size:12px;color:var(--muted)}.annual-strip{display:grid;grid-template-columns:1fr 22px 1fr 22px 1fr 22px 1fr;align-items:center;gap:12px;margin:13px 0}.annual-strip span,.annual-strip b{display:block}.annual-strip span{font-size:11px;color:#6a746e}.annual-strip b{font-size:17px;font-weight:650;margin-top:4px;white-space:nowrap}.annual-strip i{font-style:normal;color:#89968c}details summary{cursor:pointer;color:#4b646a;font-size:12px;font-weight:600}details[open]>summary{margin-bottom:12px}iframe{border:1px solid var(--line);width:100%;border-radius:10px;background:white;margin-top:8px}.monthly-heading h2{font-size:22px}.overall{font-size:15px;margin:12px 0 18px;color:#354c50;padding:12px 15px;border-left:3px solid #58877a;background:#e8efea;border-radius:0 8px 8px 0}.direction{display:flex;justify-content:space-between;color:#6c7d7c;font-size:11px;margin:0 4px 9px}.direction b{font-size:18px;padding:0 4px;color:#446f74}.chain{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.stage{position:relative;background:var(--paper);border:1px solid #dce1db;border-top:3px solid #74928c;border-radius:12px;padding:16px 15px 12px;display:flex;flex-direction:column;min-width:0}.stage.salt{border-top-color:#4d8093}.stage.material{border-top-color:#859266}.stage.battery{border-top-color:#758bac}.stage:not(:last-child)::after{content:'→';position:absolute;right:-12px;top:33px;color:#899a98;font-size:16px;z-index:1;background:var(--bg);line-height:19px}.stage header{display:flex;align-items:center;gap:9px;margin-bottom:15px}.stage-index{border:1px solid #d3dfdb;border-radius:7px;min-width:33px;text-align:center;padding:5px;font-size:11px;font-weight:650;color:#4d7272}.stage h3{font-size:18px;line-height:1.4}.stage header small{font-size:10px}.entry-label{font-size:10px;background:#e6f0eb;color:#466c5e;border-radius:5px;padding:5px 7px;margin-bottom:12px;min-height:27px}.entry-label.neutral{background:#f2f0e7;color:#7f795e}.entry-label.outbound{background:#eaf0f6;color:#58728c}.stage-primary{min-height:111px}.stage-primary>span{font-size:11px;color:#6b7b7c;display:block}.stage-primary>strong{display:block;font-size:28px;line-height:1.4;letter-spacing:-.025em;margin:4px 0;white-space:nowrap;font-variant-numeric:tabular-nums}.stage-primary strong small{font-size:11px;margin-left:4px;font-weight:500;letter-spacing:0}.stage-primary p{font-size:11px;color:#506a6c}.inline-composition{font-size:11px;display:grid;gap:3px;color:#667775;min-height:61px}.domestic-path{font-size:11px;min-height:61px;color:#4b6762}.domestic-path span{display:block;margin-top:5px;font-size:10px;color:#7a8580}.model-reference{background:#f0f4f7;border-radius:7px;padding:10px;margin:8px 0 12px;min-height:92px}.model-reference>span{display:block;font-size:10px;color:#597288}.model-reference>b{display:block;font-size:18px;color:#355977;margin:3px 0;white-space:nowrap}.model-reference b small{font-size:10px;font-weight:500;margin-left:4px}.model-reference>small{display:block;font-size:10px}.stage-conclusion{font-size:11px;color:#66716e;margin-bottom:14px;line-height:1.65}.stage-conclusion b{color:#334f4c}.stage-actions{display:grid;gap:5px;margin-top:auto}.detail-trigger{border:1px solid #d1dfd9;background:transparent;border-radius:6px;display:flex;justify-content:space-between;align-items:center;text-align:left;width:100%;font-size:11px;padding:7px 9px;color:#3b655c}.detail-trigger:hover,.detail-trigger.active{background:#e6efea;border-color:#89ac9e}.detail-trigger span{font-size:14px}.material-compact{min-height:172px;display:grid;gap:9px}.material-compact>div>span,.material-compact>div>b,.material-compact>div>small{display:block}.material-compact>div>span{font-size:11px;color:#6a786d}.material-compact>div>b{font-size:21px;line-height:1.5;white-space:nowrap}.material-compact b small{font-size:10px;font-weight:500;margin-left:4px}.material-compact>div>small{font-size:10px}.bridge-notes{display:flex;justify-content:space-between;gap:16px;font-size:10px;color:#778077;padding:10px 3px 15px}.e2-comparison{display:grid;grid-template-columns:minmax(200px,.75fr) minmax(0,1.7fr);gap:30px;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:20px 23px}.comparison-title h3{font-size:17px}.comparison-title p{font-size:11px;margin:7px 0 12px;color:var(--muted)}.comparison-title small{display:block;max-width:280px;line-height:1.7}.bar-row{margin-bottom:13px}.bar-row:last-child{margin-bottom:0}.bar-label{display:flex;align-items:baseline;justify-content:space-between;gap:10px;font-size:12px;margin-bottom:5px}.bar-label strong{font-size:13px;white-space:nowrap;font-variant-numeric:tabular-nums}.bar-track{height:9px;border-radius:4px;background:#edf1ee;overflow:hidden}.bar-track i{display:block;height:100%;background:var(--green);border-radius:3px}.bar-row.model .bar-track i{background:var(--model)}.bar-row>small{display:block;font-size:10px;margin-top:4px}.bar-track.stacked{display:flex}.bar-track.stacked i{border-radius:0}.bar-track .net{background:#a7bd9c}.key{display:inline-block;width:7px;height:7px;background:var(--green);border-radius:2px}.key.net{background:#a7bd9c}.detail-panel{margin-top:22px;background:var(--paper);border:1px solid #b4c9c1;border-radius:12px;padding:22px;scroll-margin-top:18px}.detail-panel[hidden]{display:none}.detail-panel:focus{outline:none}.detail-heading{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:24px}.detail-heading h2{font-size:22px;margin-top:3px}.detail-scope{font-size:11px;color:var(--muted)}.detail-heading button{background:transparent;border:1px solid var(--line);border-radius:7px;font-size:12px;padding:7px 12px}.detail-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:35px}.detail-grid>section{min-width:0}.detail-grid h3{font-size:15px;margin-bottom:17px}.detail-grid .bar-row{margin-bottom:16px}.detail-hero{background:#eef4ef;padding:14px 16px;border-radius:9px;margin-bottom:17px}.detail-hero>span{font-size:11px;color:#5c786d}.detail-hero>strong{display:block;font-size:27px;margin:4px 0}.detail-hero strong small{font-size:12px;font-weight:500;margin-left:5px}.detail-hero p{font-size:11px;color:#557267}.note{font-size:11px;color:var(--muted);line-height:1.75;margin:12px 0}.insight{background:#f2f5ef;padding:13px 15px;border-radius:8px;font-size:12px;line-height:1.8;color:#49615a;margin:17px 0}.path-diagram{display:flex;gap:15px;align-items:center;justify-content:center;padding:15px 10px;background:#f5f4ec;border-radius:8px;margin:15px 0;font-size:12px}.path-diagram>span{color:#829083}.reference-pair{display:grid;grid-template-columns:1fr 1fr;gap:10px}.reference-pair>div{background:#f0f4f7;padding:12px;border-radius:8px}.reference-pair span{display:block;font-size:11px;color:var(--muted)}.reference-pair b{display:block;font-size:21px;margin-top:5px}.reference-pair b small{margin-left:4px;font-weight:500}.trend-heading{display:flex;justify-content:space-between;gap:10px;align-items:baseline}.trend-heading h3{margin:0}.trend{display:grid;grid-template-columns:repeat(var(--columns),minmax(0,1fr));gap:7px;margin:12px 0 20px}.trend>div{text-align:center;font-size:10px;min-width:0}.trend>div>b{font-weight:500;color:#506962;font-variant-numeric:tabular-nums}.trend>div>div{height:100px;display:flex;align-items:flex-end;justify-content:center;border-bottom:1px solid #d4dfd9;margin:4px 0}.trend i{display:block;width:62%;background:#789c8b;border-radius:3px 3px 0 0}.trend span{color:#7c8782;font-size:9px}.route-tags{display:flex;flex-wrap:wrap;gap:8px}.route-tags span{background:#eff1e7;border:1px solid #dce1d1;border-radius:6px;padding:7px 12px;font-size:12px}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:11px;text-align:left}th{font-size:10px;color:#6f7e76;font-weight:500}td,th{padding:11px 8px;border-bottom:1px solid #e3e7df;white-space:nowrap}td:not(:first-child),th:not(:first-child){text-align:right}.bilateral{background:#f4f6f0;border:1px solid #e0e6dc;border-radius:8px;padding:15px;margin-bottom:14px}.bilateral h4{font-size:14px;margin-bottom:10px}.bilateral>div{display:flex;gap:10px;align-items:center;justify-content:space-between;font-size:12px}.bilateral>div>span{color:#7b9b87}.bilateral small{display:block;margin-top:10px;font-size:10px}.method-fold{margin-top:20px;padding:15px 5px;border-top:1px solid #d7ded4}.method-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:25px;padding:10px 0}.method-grid h3{font-size:13px;margin:5px 0 10px}.method-grid p{font-size:11px;color:var(--muted);line-height:1.8;margin-bottom:8px}footer{display:flex;justify-content:flex-end;gap:16px;margin-top:20px;font-size:12px;color:#697971}footer a,footer button{padding:7px 12px;border:1px solid #d7ded4;border-radius:6px;background:transparent;text-decoration:none}
.detail-trigger .trigger-label{font-size:11px}.trigger-label small{display:block;font-size:10px;color:#7b7b61}.bar-axis{display:flex;justify-content:space-between;font-size:10px;color:#8a938d;margin-top:10px;border-top:1px solid #d8dfd9;padding-top:3px}
.annual{background:var(--paper);padding:18px 20px}.annual iframe{margin-top:14px;border:0;border-radius:0}.origin-branches,.salt-source-branches{display:grid;gap:10px;margin-bottom:12px}.origin-branch{padding:11px;border:1px solid #d6e2d9;background:#f1f6f1;border-radius:8px;min-width:0}.origin-branch h4{font-size:13px;color:#345f51;margin-bottom:3px}.origin-branch>small{display:block;font-size:10px}.origin-branch>strong{display:block;font-size:25px;line-height:1.4;margin:5px 0;white-space:nowrap}.origin-branch>strong>small{font-size:10px;font-weight:500;margin-left:4px}.origin-branch>p{font-size:10px;color:#627869;line-height:1.7;margin:5px 0}.origin-branch .detail-trigger{margin-top:9px;background:#ffffff75}.origin-branch.domestic{background:#f1f6f1;border-color:#d6e2d9}.domestic-kinds{display:flex;flex-wrap:wrap;gap:5px;margin:12px 0}.domestic-kinds span{padding:4px 6px;background:#e4eee4;border-radius:4px;color:#416145;font-size:11px}.domestic-path{min-height:0;margin:1px 0 10px}.imported-salt{background:#edf4f6;border-color:#d5e1e7}.imported-salt h4{color:#3c6275}.origin-branch .inline-composition{min-height:0;font-size:10px}.salt-trade-mini{display:flex;gap:7px;flex-wrap:wrap;font-size:10px;color:#526f79}.salt-trade-mini b{font-size:12px}.project-note{display:block;white-space:normal;font-size:10px}.detail-grid td:first-child{white-space:normal}
@media(min-width:1750px){main{margin-left:auto;padding-left:82px}}@media(max-width:1250px){main{padding:24px}.stage{padding:13px 11px 11px}.stage-primary>strong{font-size:24px}.stage-primary strong small{font-size:9px}.stage h3{font-size:16px}.entry-label{font-size:9px}.model-reference{padding:8px}.model-reference>b{font-size:16px}.model-reference b small{font-size:9px}.stage-conclusion{font-size:10px}.annual-strip b{font-size:14px}.annual-strip span{font-size:10px}.material-compact>div>b{font-size:19px}.detail-grid{gap:22px}}@media(max-width:1000px){.chain{grid-template-columns:repeat(2,minmax(0,1fr))}.stage:nth-child(2)::after{display:none}.e2-comparison{grid-template-columns:1fr}.comparison-title small{max-width:none}.bridge-notes{display:block}.bridge-notes span{display:block}.annual-strip{grid-template-columns:1fr 18px 1fr}.annual-strip i:nth-child(4){display:none}.method-grid{grid-template-columns:1fr}.detail-grid{grid-template-columns:1fr}.reference-pair{grid-template-columns:1fr 1fr}.section-heading{align-items:flex-start;flex-direction:column;gap:4px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}