:root{--ink:#172b43;--muted:#6c7b8b;--accent:#bd542c;--line:#e0e5ea;--paper:#fff;--bg:#f5f6f8;font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #de976d;outline-offset:5px}button:disabled{opacity:.45}svg{display:block;width:22px;height:22px;flex-shrink:0}[hidden]{display:none!important}p,h1,h2,h3{margin:0}.skip-link{position:absolute;top:-80px;left:20px;background:var(--ink);color:white;padding:12px;z-index:10}.skip-link:focus{top:10px}.header{background:#fff;border-bottom:1px solid var(--line)}.header-inner{max-width:1120px;margin:auto;padding:21px 32px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;gap:13px;align-items:center;font-size:18px;font-weight:650;letter-spacing:1px}.brand-symbol{background:var(--ink);color:#fff;border-radius:12px;padding:12px}.brand-symbol svg{width:24px;height:24px}.brand small{display:block;font-size:11px;font-weight:400;color:var(--muted);margin-top:5px;letter-spacing:2px}nav{display:flex;gap:32px;font-size:14px}nav a{position:relative;padding:10px 0;color:var(--muted)}nav a[aria-current="page"]{color:var(--ink);font-weight:600}nav a[aria-current="page"]:after{content:"";position:absolute;height:3px;border-radius:3px;background:var(--accent);bottom:0;left:0;right:0}main{max-width:1120px;padding:0 32px;margin:0 auto;outline:none;min-height:70vh}.hero{display:flex;align-items:center;gap:40px;padding:66px 0 54px;border-bottom:1px solid var(--line)}.hero-copy{flex:1}.eyebrow{font-size:11px;font-weight:650;letter-spacing:2px;color:var(--accent);display:flex;align-items:center;gap:8px}.eyebrow span{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent)}.hero h1{font-size:clamp(32px,3.9vw,44px);line-height:1.4;letter-spacing:-1px;font-weight:650;margin:18px 0}.hero-description{font-size:15px;color:var(--muted);line-height:1.9}.button{display:inline-flex;align-items:center;justify-content:center;gap:18px;border:1px solid transparent;border-radius:9px;min-height:48px;padding:12px 23px;font-size:14px;font-weight:550;transition:background .18s,transform .18s}.button.primary{background:var(--ink);color:#fff}.button.primary:hover{background:#29445f}.hero .button{margin-top:26px}.hero-art{width:40%;max-width:410px;transform:rotate(-8deg);opacity:.9}.hero-art svg{width:100%;height:auto}.art-caption{font-size:10px;letter-spacing:3px;color:var(--muted);text-align:center;margin-top:14px}.catalog{padding:38px 0 50px}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:25px}.muted{color:var(--muted);font-size:10px}.section-heading h2{font-size:25px;font-weight:600;margin-top:8px}.catalog-count{font-size:12px;color:var(--muted);white-space:nowrap;padding-bottom:3px}.catalog-count strong{font-size:17px;color:var(--ink);font-weight:550}.catalog-count span{padding:0 8px;color:#bec6ce}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.scene-card{padding:21px 23px 19px;border:1px solid var(--line);border-radius:12px;background:var(--paper);min-height:168px;display:flex;flex-direction:column;transition:border-color .18s,box-shadow .18s,transform .18s}.scene-card:hover{border-color:#a2b3c2;box-shadow:0 5px 18px #172b4307;transform:translateY(-2px)}.scene-meta{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.card-number{font-size:15px;font-variant-numeric:tabular-nums;color:#7d8f9f;letter-spacing:1px}.ready-dot{width:6px;height:6px;background:#afbbc6;border-radius:50%}.scene-card h3{font-size:17px;font-weight:600;line-height:1.55;flex:1}.scene-bottom{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:18px;font-size:11px;color:var(--muted)}.scene-bottom svg{width:18px;height:18px;color:#8c9bac}.badge{font-size:10px;letter-spacing:.3px;padding:4px 8px;border-radius:4px;background:#eff3f6;color:#637889;white-space:nowrap}.badge.partial{background:#fff1e6;color:#a06239}.badge.missing{background:#f0f1f3;color:#84909b}.is-missing{background:#fafbfc}.is-missing h3{color:#647487}.catalog-note{font-size:12px;color:var(--muted);margin-top:25px;line-height:1.8}.footer{max-width:1056px;border-top:1px solid var(--line);padding:22px 0 30px;margin:0 auto;display:flex;justify-content:space-between;font-size:11px;color:#8592a0;gap:16px}.reader{max-width:800px;margin:0 auto;padding:34px 0 56px}.reader-top{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted);margin-bottom:18px}.reader-top b{font-weight:500;color:var(--ink);margin-left:13px}.back-link{font-size:13px;color:var(--ink);padding:7px 0}.progress-track{height:3px;background:#e4e9ee;border-radius:3px;margin-bottom:24px;overflow:hidden}.progress-track span{display:block;height:100%;background:var(--accent);border-radius:3px}.reading-card{border:1px solid var(--line);background:#fff;border-radius:16px;padding:34px 38px}.reading-meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.reading-card h1{font-size:clamp(25px,3.1vw,32px);font-weight:600;line-height:1.45;outline:none;overflow-wrap:anywhere}.announcement{margin-top:26px;background:#f4f7fa;padding:26px 28px;border-radius:9px;border-left:3px solid #9cb0c0}.answer-label{font-size:11px;letter-spacing:2px;color:var(--muted);margin-bottom:14px}.announcement-lines{font-size:23px;font-weight:450;line-height:1.85;letter-spacing:.4px;overflow-wrap:anywhere}.announcement-lines p+p{padding-top:14px;margin-top:14px;border-top:1px solid #e0e7ee}.detail-sections{margin-top:20px}details{border-bottom:1px solid var(--line)}summary{padding:19px 0;display:flex;align-items:center;gap:15px;cursor:pointer;list-style:none;font-size:14px;font-weight:550}summary::-webkit-details-marker{display:none}summary:after{content:"+";margin-left:auto;font-size:20px;font-weight:400;color:#8595a5}details[open] summary:after{content:"−"}.detail-caption{font-size:11px;font-weight:400;color:var(--muted)}.detail-content{padding:0 0 20px;font-size:14px;line-height:1.9;color:#54687b;overflow-wrap:anywhere;white-space:pre-line}.detail-content p+p{margin-top:8px}.formula-line{background:#f7f8fa;padding:10px 14px;border-radius:6px;font-size:14px;letter-spacing:.3px}.reader-actions{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-top:22px}.button.secondary{background:#fff;border-color:#dbe2e9;color:var(--ink)}.button.secondary:hover{background:#eaf0f5}.button.random{color:var(--muted);background:transparent;gap:9px}.button.random:hover{color:var(--ink);background:#eaf0f5}.reader-mid{font-size:11px;color:var(--muted)}.reader-tip{font-size:12px;color:var(--muted);text-align:center;margin-top:20px;line-height:1.8}.reader-tip a{color:var(--accent)}.recall-prompt{margin-top:28px;padding:32px 20px 36px;text-align:center;background:#f5f7fa;border-radius:10px}.recall-mark{font:64px/1 Georgia,serif;color:#b0c0cd;height:50px}.recall-prompt h2{font-size:19px;font-weight:500;margin:10px 0}.recall-prompt p{font-size:13px;color:var(--muted);line-height:1.9}.recall-prompt .button{margin-top:25px}.text-button{background:none;border:0;font-size:12px;color:var(--accent);padding:15px 0 0;min-height:44px}.missing-content h2{font-size:20px;font-weight:500;margin-bottom:12px}.missing-content>p:last-child{font-size:14px;line-height:1.9;color:var(--muted)}.loading,.load-error{padding:100px 0;text-align:center;color:var(--muted)}.load-error h1{color:var(--ink);font-size:25px;margin-bottom:16px}.load-error .button{margin-top:25px}
@media(min-width:1400px){.hero{padding-top:78px;padding-bottom:64px}}
@media(max-width:800px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-art{width:35%}.footer{margin:0 32px}.hero{gap:16px}.reading-card{padding:30px}.announcement-lines{font-size:21px}}
@media(max-width:560px){.header-inner{padding:16px 20px;gap:10px}.brand{font-size:15px;gap:9px;letter-spacing:.5px}.brand-symbol{padding:9px;border-radius:9px}.brand-symbol svg{width:21px;height:21px}.brand small{font-size:9px;letter-spacing:1px}nav{gap:17px;font-size:12px;flex-shrink:0}main{padding:0 20px}.hero{padding:36px 0 32px;display:block;position:relative;overflow:hidden}.hero h1{font-size:34px;position:relative;z-index:1}.hero-copy{position:relative;z-index:1}.hero-description{font-size:13px;line-height:1.9}.hero-art{position:absolute;right:-85px;top:4px;width:210px;opacity:.45;transform:rotate(55deg)}.art-caption{display:none}.hero .button{margin-top:23px}.eyebrow{font-size:9px;letter-spacing:1.4px}.catalog{padding-top:28px}.section-heading h2{font-size:23px}.section-heading{gap:10px;margin-bottom:19px}.catalog-count{font-size:10px}.catalog-count strong{font-size:14px}.catalog-count span{padding:0 4px}.card-grid{grid-template-columns:1fr;gap:11px}.scene-card{padding:18px 20px 16px;min-height:135px}.scene-meta{margin-bottom:10px}.scene-bottom{margin-top:13px}.scene-card h3{font-size:17px}.footer{margin:0 20px;flex-direction:column;gap:7px;font-size:10px}.reader{padding-top:20px}.reading-card{padding:24px 20px;border-radius:12px}.reading-card h1{font-size:26px}.announcement{padding:20px 18px;margin-top:22px}.announcement-lines{font-size:20px;line-height:1.9}.reader-actions{gap:7px}.reader-actions .button{font-size:12px;min-height:46px;padding:12px;gap:7px}.reader-actions .random{padding:12px 6px}.reader-actions .random svg{width:17px;height:17px}.reader-mid{font-size:9px}.reader-tip{font-size:11px}.recall-prompt{padding:27px 14px 30px}.recall-prompt p{font-size:12px}.detail-caption{font-size:10px}.detail-content{font-size:13px}.formula-line{font-size:13px;padding:10px}.catalog-note{font-size:11px}}
.variable{color:#1769aa}.answer-label{display:flex;justify-content:space-between;align-items:center;gap:8px}.variable-key{color:#1769aa;font-size:10px;font-weight:400;letter-spacing:0}
.is-reader main{min-height:0}.is-reader .footer{display:none}.practice-entry{color:var(--accent);padding:12px 4px;min-height:44px;display:inline-flex;align-items:center}
@media(max-width:560px){
  .is-reader .header-inner{padding:11px 16px;gap:8px}
  .is-reader .brand{font-size:14px;gap:8px;letter-spacing:0}
  .is-reader .brand-symbol{padding:8px}
  .is-reader .brand small{margin-top:3px}
  .is-reader nav{gap:12px;font-size:11px}
  .is-reader main{padding:0 16px}
  .reader{padding:12px 0 16px}
  .reader-top{margin-bottom:8px;font-size:11px}
  .reader-top b{margin-left:8px}
  .progress-track{margin-bottom:12px}
  .reading-card{padding:16px;border-radius:10px}
  .reading-meta{margin-bottom:8px}
  .reading-card h1{font-size:22px;line-height:1.4}
  .announcement{margin-top:12px;padding:12px 14px}
  .answer-label{margin-bottom:6px;font-size:10px}
  .announcement-lines{font-size:18px;line-height:1.65;letter-spacing:0}
  .announcement-lines p+p{padding-top:4px;margin-top:4px}
  .detail-sections{margin-top:8px}
  .detail-sections summary{padding:10px 0;font-size:13px}
  .detail-content{padding-bottom:10px;line-height:1.65}
  .detail-content p+p{margin-top:4px}
  .formula-line{padding:0;background:none;line-height:1.65;font-size:13px;letter-spacing:0}
  .reader-actions{margin-top:12px;gap:8px}
  .reader-actions .button{min-height:44px;padding:10px 12px}
  .reader-tip{margin-top:9px;font-size:10px;line-height:1.5}
  .recall-prompt{margin-top:18px;padding:24px 12px}
  .recall-prompt .button{margin-top:18px}
  .text-button{padding-top:8px;min-height:36px}
}
@media(max-width:560px) and (max-height:740px){
  .reader{padding-top:8px;padding-bottom:10px}
  .reader-top{margin-bottom:5px}
  .progress-track{margin-bottom:8px}
  .reading-card{padding:14px}
  .reading-card h1{font-size:20px}
  .announcement{padding:10px 12px;margin-top:10px}
  .announcement-lines{font-size:17px;line-height:1.55}
  .announcement-lines p+p{padding-top:3px;margin-top:3px}
  .detail-sections summary{padding:8px 0}
  .reader-tip{display:none}
}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;scroll-behavior:auto!important}}