:root{color-scheme:dark;--bg:#0b0b0a;--ink:#f0efea;--muted:#b7b6ad;--quiet:#93948d;--line:#34352f;--panel:#171815;--accent:#c4db8b;--reader:1120px;--body-font:"PingFang SC","Microsoft YaHei",sans-serif;--display-font:"Space Grotesk","PingFang SC",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:auto;scroll-padding-top:95px}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body-font);line-height:1.85}a{color:inherit;text-decoration:none}button{font:inherit}a:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:6px}p{margin:0 0 18px}h1,h2,h3{font-family:var(--display-font);font-weight:500}h1,h2,h3,p{overflow-wrap:anywhere}h1{font-size:clamp(34px,4.6vw,66px);line-height:1.28;letter-spacing:-.04em;margin:15px 0 24px;max-width:900px}h2{font-size:clamp(24px,2.5vw,35px);line-height:1.4;letter-spacing:-.03em;margin:0}h3{font-size:18px;line-height:1.5;margin:0 0 12px}.case-page{max-width:var(--reader);margin:auto;padding:130px 28px 50px}.breadcrumb{display:flex;align-items:center;gap:13px;font-size:12px;color:var(--quiet);margin-bottom:40px}.breadcrumb a:hover{color:var(--ink)}.eyebrow{font-family:var(--display-font);font-size:11px;letter-spacing:.12em;color:var(--accent)}.case-lead{font-size:18px;line-height:1.8;max-width:760px;color:var(--muted)}.case-meta{display:flex;gap:14px;flex-wrap:wrap;margin:30px 0 38px;padding:17px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted);font-size:12px}.case-meta span+span{padding-left:14px;border-left:1px solid var(--line)}.hero-media{margin:0;display:grid;grid-template-columns:1.1fr 1fr;background:var(--panel);min-height:300px}.hero-media img{width:100%;height:350px;object-fit:contain;display:block;background:#1d1e1a;padding:18px}.hero-media figcaption{padding:40px;display:flex;flex-direction:column;justify-content:center}.hero-media .media-label{font-size:11px;letter-spacing:.1em;color:var(--quiet);margin-bottom:22px}.hero-media .media-title{font-size:clamp(23px,2.3vw,32px);line-height:1.55;margin-bottom:20px}.hero-media .media-copy{color:var(--muted);font-size:14px;margin:0}.section-index{position:sticky;top:65px;z-index:5;display:flex;gap:28px;overflow:auto;background:var(--bg);padding:18px 0;border-bottom:1px solid var(--line);font-size:12px;white-space:nowrap;margin:25px 0 40px}.section-index a{color:var(--muted)}.section-index a:hover,.section-index a[aria-current]{color:var(--accent)}.case-section{padding:40px 0 50px;border-bottom:1px solid var(--line);scroll-margin-top:28px}.section-header{display:flex;align-items:baseline;gap:22px;margin-bottom:28px}.section-no{color:var(--accent);font-family:var(--display-font);font-size:12px}.section-copy{max-width:810px;color:var(--muted);font-size:16px}.source-link{font-size:11px;color:var(--quiet);display:inline-block;margin-top:3px}.source-link:hover{color:var(--accent)}.scenario-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:25px}.scenario{border-top:2px solid var(--line);padding-top:22px}.scenario .scenario-icon{font-family:var(--display-font);display:block;color:var(--accent);font-size:14px;margin-bottom:19px}.scenario p{font-size:14px;color:var(--muted);margin:0}.section-note{font-size:12px;color:var(--quiet);margin-top:-12px;margin-bottom:26px}.value-table{width:100%;table-layout:fixed;border-collapse:separate;border-spacing:0 14px;text-align:left}.value-table th{font-size:12px;color:var(--quiet);font-weight:400;padding:0 24px 4px}.value-table td{vertical-align:top;background:var(--panel);padding:26px 24px;position:relative}.value-table td+td{border-left:1px solid var(--line)}.value-table td:not(:last-child)::after{content:"→";position:absolute;right:-9px;top:26px;background:var(--panel);z-index:1;color:var(--quiet);font-size:18px}.value-table h3{font-size:17px}.value-table p{font-size:14px;color:var(--muted);margin:0}.value-table td:last-child h3{color:var(--accent)}.product-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.product{display:block;border:1px solid var(--line);padding:25px 26px;transition:border-color .2s,background .2s}.product:hover{border-color:var(--accent);background:var(--panel)}.product .product-type{display:block;color:var(--quiet);font-size:11px;margin-bottom:10px}.product h3{display:flex;justify-content:space-between;gap:20px}.product h3 span{color:var(--accent)}.product p{color:var(--muted);font-size:14px;margin:0}.highlight-intro{max-width:820px;font-size:16px;color:var(--muted);margin-bottom:30px}.highlight{display:grid;grid-template-columns:64px 1fr;gap:15px;border-top:1px solid var(--line);padding:27px 0}.highlight .highlight-number{font-size:28px;line-height:1.3;color:var(--accent);font-family:var(--display-font)}.highlight h3{font-size:21px;margin-bottom:12px}.highlight p{max-width:760px;color:var(--muted);font-size:15px;margin:0}.pending{border:1px dashed var(--line);padding:25px;color:var(--muted);font-size:14px}.draft-note{display:flex;gap:14px;align-items:baseline;margin-top:30px;color:var(--quiet);font-size:12px}.draft-note strong{color:var(--accent);font-weight:400;white-space:nowrap}.source-record{font-size:12px;color:var(--quiet);margin-top:30px}.source-record summary{cursor:pointer}.source-record .record-content{margin-top:16px;border-left:1px solid var(--line);padding-left:20px;max-width:800px}.source-record .record-content h3{font-size:13px;margin:16px 0 6px}.source-record .record-content p{margin-bottom:9px}.case-end{display:flex;justify-content:space-between;gap:28px;padding:45px 0 15px;font-size:15px}.case-end a:hover{color:var(--accent)}.case-end .next{color:var(--muted)}.case-end .next span{display:block;font-size:11px;color:var(--quiet);margin-bottom:5px}.overview-list{margin-top:40px}.overview-item{display:grid;grid-template-columns:45px 1fr auto;align-items:center;gap:20px;padding:30px 0;border-top:1px solid var(--line)}.overview-item .num{color:var(--accent);font-size:12px}.overview-item h2{font-size:24px}.overview-item p{font-size:14px;color:var(--muted);margin:8px 0 0}.overview-item:hover h2{color:var(--accent)}.skip-link{position:fixed;top:10px;left:20px;transform:translateY(-150%);z-index:100;background:var(--ink);color:var(--bg);padding:8px 15px}.skip-link:focus{transform:none}
@media(max-width:760px){.case-page{padding:106px 20px 32px}.breadcrumb{margin-bottom:28px}.case-lead{font-size:16px}.hero-media{grid-template-columns:1fr;min-height:0}.hero-media img{height:260px}.hero-media figcaption{padding:24px}.hero-media .media-label{margin-bottom:12px}.hero-media .media-title{font-size:24px;margin-bottom:14px}.section-index{gap:23px;margin:18px 0 20px;top:62px}.case-section{padding:32px 0}.section-header{gap:14px;margin-bottom:22px}.section-copy{font-size:15px}.scenario-list,.product-list{grid-template-columns:1fr}.scenario-list{gap:20px}.scenario{padding-top:17px}.scenario .scenario-icon{margin-bottom:9px}.scenario h3{margin-bottom:8px}.value-table,.value-table tbody,.value-table tr,.value-table td{display:block;width:100%}.value-table thead{display:none}.value-table tr{margin-bottom:18px}.value-table td{padding:20px}.value-table td+td{border-left:none;border-top:1px solid var(--line)}.value-table td::before{content:attr(data-label);display:block;font-size:11px;color:var(--quiet);margin-bottom:9px}.value-table td:not(:last-child)::after{content:"↓";top:auto;bottom:-12px;right:24px}.value-table h3{font-size:17px}.value-table p{font-size:14px}.highlight{grid-template-columns:38px 1fr;gap:12px;padding:23px 0}.highlight .highlight-number{font-size:23px}.highlight h3{font-size:19px}.highlight p{font-size:14px}.draft-note{display:block}.draft-note strong{display:block;margin-bottom:7px}.case-end{font-size:13px}.case-meta{gap:8px}.case-meta span+span{border-left:0;padding-left:0}.case-meta span{width:100%}.overview-item{grid-template-columns:28px 1fr auto;gap:10px}.overview-item h2{font-size:22px}.overview-item p{font-size:13px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.product{transition:none}}