:root{
    --bg:#0c0d11;
    --panel:rgba(20,22,28,0.82);
    --line:rgba(255,255,255,0.10);
    --line-strong:rgba(255,255,255,0.22);
    --txt:#e9eaee;
    --txt-dim:#8b8f9a;
    --c:#13b5ea;  /* Cyan  */
    --m:#ec008c;  /* Magenta */
    --y:#ffe800;  /* Yellow */
    --k:#cfd2d8;  /* Key(墨)ラベル色 */
    --mono:"JetBrains Mono",'SFMono-Regular',Menlo,Consolas,monospace;
    --jp:'Zen Kaku Gothic New',system-ui,-apple-system,sans-serif;
  }
  *{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
  html{scroll-behavior:smooth;background:var(--bg);}
  body{margin:0;min-height:100%;background:var(--bg);color:var(--txt);font-family:var(--jp);
    -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;}
  body::selection{background:rgba(19,181,234,.34);}
  a{color:inherit;}
  #app{position:relative;height:100svh;min-height:620px;overflow:hidden;background:var(--bg);}
  canvas#scene{display:block;width:100%;height:100%;cursor:grab;touch-action:none;}
  canvas#scene:active{cursor:grabbing;}

  /* ---- topbar ---- */
  #topbar{position:absolute;top:0;left:0;right:0;display:flex;align-items:center;gap:14px;
    padding:14px 18px;pointer-events:none;z-index:30;}
  #title{pointer-events:none;background:rgba(12,13,17,.82);border:1px solid var(--line);
    border-radius:8px;padding:7px 10px;backdrop-filter:blur(8px);box-shadow:0 8px 22px rgba(0,0,0,.22);}
  #title h1{font-size:15px;letter-spacing:.14em;font-weight:700;margin:0;
    font-family:var(--mono);text-transform:uppercase;}
  #title .sub{font-size:11px;color:var(--txt-dim);letter-spacing:.04em;margin-top:2px;}
  .swatches{display:flex;gap:6px;margin-left:auto;pointer-events:none;}
  .sw{width:11px;height:11px;border-radius:2px;box-shadow:0 0 0 1px rgba(0,0,0,.4);}
  .guide-jump{pointer-events:auto;display:inline-flex;align-items:center;justify-content:center;
    gap:6px;min-height:34px;padding:0 13px;border:1px solid rgba(255,143,59,.78);border-radius:9px;
    background:#ff9f43;color:#fff;
    font-family:var(--mono);font-size:11px;letter-spacing:.04em;text-decoration:none;white-space:nowrap;
    font-weight:700;box-shadow:0 8px 24px rgba(255,143,59,.26),0 0 0 1px rgba(255,255,255,.16) inset;
    transition:background .18s,border-color .18s,transform .18s,box-shadow .18s;}
  .guide-jump:hover{background:#ffb15f;border-color:#ffd19a;box-shadow:0 10px 28px rgba(255,143,59,.34);}
  .guide-jump:active{transform:translateY(1px);}

  /* ---- stage caption (current step) ---- */
  #stage{position:absolute;top:86px;left:18px;z-index:25;max-width:300px;pointer-events:none;}
  #stage .step{font-family:var(--mono);font-size:11px;color:var(--txt-dim);letter-spacing:.12em;}
  #stage .name{font-size:18px;font-weight:700;margin:3px 0 4px;line-height:1.25;position:relative;
    transition:color .3s;}
  #stage .desc{font-size:12.5px;line-height:1.6;color:#c4c7cf;
    background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:10px 12px;
    backdrop-filter:blur(8px);}
  #stage .pips{display:flex;gap:6px;margin:11px 0 9px;}
  #stage .pip{width:20px;height:4px;border-radius:2px;background:rgba(255,255,255,.14);
    transition:background .3s, transform .3s, box-shadow .3s;}
  #stage .pip.filled{background:var(--pc);}
  #stage .pip.active{transform:scaleY(2);box-shadow:0 0 9px var(--pc);}
  @keyframes stPop{from{opacity:0;transform:translateY(9px);}to{opacity:1;transform:translateY(0);}}
  #stage .pop{animation:stPop .42s cubic-bezier(.2,.85,.25,1) both;}
  #stage .name.pop::after{content:'';position:absolute;left:0;bottom:-3px;height:2px;width:100%;
    background:currentColor;border-radius:2px;transform-origin:left;
    animation:stSweep .55s cubic-bezier(.2,.85,.25,1) both;}
  @keyframes stSweep{from{transform:scaleX(0);opacity:.15;}to{transform:scaleX(1);opacity:.65;}}

  /* ---- 2D result inset ---- */
  #inset{position:absolute;right:16px;bottom:84px;z-index:25;width:212px;
    background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px;
    backdrop-filter:blur(8px);}
  #inset .lbl{font-family:var(--mono);font-size:10px;color:var(--txt-dim);letter-spacing:.1em;margin-bottom:8px;}
  #inset canvas{width:100%;border-radius:6px;display:block;image-rendering:auto;background:#f8f5ee;}
  #chans{display:flex;gap:6px;margin-top:9px;}
  .chan{flex:1;text-align:center;font-family:var(--mono);font-size:11px;font-weight:500;
    padding:5px 0;border-radius:6px;border:1px solid var(--line);color:var(--txt-dim);
    transition:all .25s ease;}
  .chan.on{color:#0c0d11;border-color:transparent;}
  #toggleHT{margin-top:9px;width:100%;font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;
    display:flex;align-items:center;justify-content:center;gap:6px;
    background:transparent;color:var(--txt-dim);border:1px solid var(--line);border-radius:7px;
    padding:7px;cursor:pointer;transition:.2s;}
  #toggleHT:hover{color:var(--txt);border-color:var(--line-strong);}
  #toggleHT.active{color:#0c0d11;background:var(--y);border-color:transparent;}

  /* ---- bottom control bar ---- */
  #controls{position:absolute;left:50%;transform:translateX(-50%);bottom:16px;z-index:30;
    display:flex;align-items:center;gap:10px;background:var(--panel);border:1px solid var(--line);
    border-radius:14px;padding:10px 12px;backdrop-filter:blur(10px);
    box-shadow:0 8px 30px rgba(0,0,0,.4);max-width:calc(100vw - 32px);flex-wrap:wrap;justify-content:center;}
  .btn{font-family:var(--mono);font-size:12px;letter-spacing:.04em;color:var(--txt);
    display:inline-flex;align-items:center;justify-content:center;gap:6px;
    background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:9px;
    padding:9px 13px;cursor:pointer;transition:.18s;white-space:nowrap;position:relative;}
  .btn:hover{background:rgba(255,255,255,.11);border-color:var(--line-strong);}
  .btn.primary{background:#fff;color:#0c0d11;border-color:#fff;font-weight:500;}
  .btn.primary:hover{background:#e6e6e6;}
  #playBtn.paused{box-shadow:0 0 0 1px rgba(72,211,143,.6),0 0 18px rgba(72,211,143,.24);
    animation:playButtonPulse 2.1s ease-in-out infinite;}
  #playBtn.paused::after{content:"";position:absolute;inset:-8px;border-radius:15px;
    border:2px solid rgba(72,211,143,.76);opacity:0;pointer-events:none;
    animation:playPulse 2.1s ease-out infinite;}
  #playBtn.paused::before{content:"";position:absolute;inset:-3px;border-radius:11px;
    border:1px solid rgba(255,255,255,.65);opacity:.45;pointer-events:none;}
  @keyframes playButtonPulse{
    0%,100%{background:#fff;}
    45%{background:#d9f8e8;}
  }
  @keyframes playPulse{
    0%{transform:scale(.92);opacity:.72;}
    72%{transform:scale(1.18);opacity:0;}
    100%{transform:scale(1.18);opacity:0;}
  }
  .seg{display:flex;gap:2px;background:rgba(255,255,255,.04);border:1px solid var(--line);
    border-radius:9px;padding:3px;}
  .seg button{font-family:var(--mono);font-size:11px;color:var(--txt-dim);background:transparent;
    border:none;border-radius:6px;padding:6px 9px;cursor:pointer;transition:.15s;}
  .seg button.on{background:rgba(255,255,255,.14);color:var(--txt);}
  .vdiv{width:1px;height:26px;background:var(--line);margin:0 2px;}
  .ctl-lbl{font-family:var(--mono);font-size:10px;color:var(--txt-dim);letter-spacing:.08em;}

  /* ---- 3D HTML labels ---- */
  #labels{position:absolute;inset:0;z-index:20;pointer-events:none;}
  .lab{position:absolute;transform:translate(-50%,-50%);font-family:var(--mono);font-size:10.5px;
    letter-spacing:.03em;color:#fff;background:rgba(12,13,17,.7);border:1px solid var(--line-strong);
    padding:2px 6px;border-radius:5px;white-space:nowrap;backdrop-filter:blur(3px);
    transition:opacity .2s;text-align:center;line-height:1.15;}
  .lab.unit{font-weight:500;}
  .lab .jp{display:block;}
  .lab .en{display:block;font-size:8.5px;opacity:.62;letter-spacing:.05em;margin-top:1px;}
  .lab.clickable{cursor:pointer;}
  .lab.edge-flow{display:inline-flex;align-items:center;gap:3px;}
  .lab.edge-flow svg{width:10px;height:10px;stroke-width:2.4;}

  /* ---- part explanation modal ---- */
  #partModal{position:absolute;z-index:42;right:16px;top:50%;
    transform:translateY(-50%) translateX(24px);
    width:300px;max-width:calc(100vw - 32px);
    background:var(--panel);border:1px solid var(--line-strong);border-radius:14px;
    padding:16px;backdrop-filter:blur(12px);box-shadow:0 14px 44px rgba(0,0,0,.55);
    opacity:0;pointer-events:none;transition:opacity .26s ease, transform .26s ease;}
  #partModal.open{opacity:1;transform:translateY(-50%) translateX(0);pointer-events:auto;}
  #partModal .pm-tag{display:inline-block;font-family:var(--mono);font-size:10px;
    letter-spacing:.08em;padding:3px 9px;border-radius:99px;color:#0c0d11;
    background:#cfd2d8;margin-bottom:11px;font-weight:500;}
  #partModal .pm-en{font-family:var(--mono);font-size:10px;letter-spacing:.13em;
    text-transform:uppercase;color:var(--txt-dim);}
  #partModal .pm-jp{font-size:20px;font-weight:700;margin:3px 0 10px;}
  #partModal .pm-body{font-size:13px;line-height:1.75;color:#d2d5dc;}
  #partModal .pm-btns{display:flex;gap:8px;margin-top:15px;}
  #partModal .pm-btns button{flex:1;font-family:var(--mono);font-size:11px;letter-spacing:.03em;
    display:inline-flex;align-items:center;justify-content:center;gap:6px;
    padding:10px;border-radius:8px;cursor:pointer;border:1px solid var(--line);
    background:rgba(255,255,255,.05);color:var(--txt);transition:.15s;}
  #partModal .pm-btns button:hover{background:rgba(255,255,255,.12);}
  #partModal .pm-btns .prim{background:#fff;color:#0c0d11;border-color:#fff;}

  /* hint */
  #hint{position:absolute;left:18px;bottom:140px;z-index:24;font-family:var(--mono);font-size:10.5px;
    color:#c4c7cf;pointer-events:none;line-height:1.6;background:rgba(12,13,17,.58);
    border:1px solid var(--line);border-radius:8px;padding:7px 10px;backdrop-filter:blur(7px);
    max-width:310px;}
  #loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;z-index:80;
    background:radial-gradient(circle at 50% 42%,rgba(43,47,56,.96),rgba(12,13,17,.98) 54%,#07080b 100%);
    color:var(--txt);font-family:var(--mono);transition:opacity .55s ease,visibility .55s ease;
    overflow:hidden;}
  #loading::before{content:"";position:absolute;inset:0;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,.055),transparent);
    transform:translateX(-100%);animation:loadSweep 1.7s cubic-bezier(.2,.7,.3,1) infinite;}
  #loading::after{content:"";position:absolute;left:0;right:0;top:50%;height:1px;
    background:linear-gradient(90deg,transparent,rgba(19,181,234,.35),rgba(236,0,140,.26),rgba(255,232,0,.28),transparent);
    opacity:.58;}
  #loading.done{opacity:0;visibility:hidden;pointer-events:none;}
  .guide-jump svg,.return-visual svg,.btn svg,#toggleHT svg,#partModal .pm-btns button svg{
    width:14px;height:14px;flex:0 0 auto;stroke-width:2.2;
  }
  .load-card{position:relative;z-index:1;width:min(360px,calc(100vw - 48px));text-align:center;
    padding:28px 24px 26px;border:1px solid rgba(255,255,255,.12);border-radius:10px;
    background:rgba(12,13,17,.44);box-shadow:0 18px 60px rgba(0,0,0,.42);
    backdrop-filter:blur(10px);}
  .load-mark{display:flex;justify-content:center;gap:7px;margin-bottom:20px;}
  .load-mark span{width:10px;height:10px;border-radius:2px;box-shadow:0 0 0 1px rgba(255,255,255,.14) inset;
    animation:loadPulse 1.25s ease-in-out infinite;}
  .load-mark span:nth-child(1){background:var(--c);animation-delay:0s;}
  .load-mark span:nth-child(2){background:var(--m);animation-delay:.12s;}
  .load-mark span:nth-child(3){background:var(--y);animation-delay:.24s;}
  .load-mark span:nth-child(4){background:#1a1a1a;box-shadow:0 0 0 1px rgba(255,255,255,.42) inset;animation-delay:.36s;}
  .load-title{font-size:18px;font-weight:700;letter-spacing:.16em;}
  .load-sub{margin-top:8px;font-family:var(--jp);font-size:13px;font-weight:700;letter-spacing:.03em;color:#d6dbe3;}
  .load-track{height:3px;margin:24px auto 13px;border-radius:99px;background:rgba(255,255,255,.12);
    overflow:hidden;}
  .load-track span{display:block;height:100%;width:42%;border-radius:inherit;
    background:linear-gradient(90deg,var(--c),var(--m),var(--y));animation:loadTrack 1.45s ease-in-out infinite;}
  .load-note{font-size:10px;letter-spacing:.16em;color:#88909c;}
  @keyframes loadSweep{to{transform:translateX(100%);}}
  @keyframes loadPulse{0%,100%{transform:translateY(0);opacity:.58;}45%{transform:translateY(-4px);opacity:1;}}
  @keyframes loadTrack{0%{transform:translateX(-105%);}58%,100%{transform:translateX(245%);}}
  @media (max-width:640px){
    #topbar{padding:10px 12px;gap:8px;}
    #title h1{font-size:13px;}
    #title .sub{font-size:9.5px;}
    .guide-jump{min-height:32px;padding:0 9px;font-size:10px;}
    /* compact stage: keep step + name, drop the description box */
    #stage{top:82px;left:12px;max-width:62vw;}
    #stage .desc{display:none;}
    #stage .name{font-size:15px;margin:2px 0 0;
      background:var(--panel);border:1px solid var(--line);border-radius:8px;
      padding:5px 9px;display:inline-block;backdrop-filter:blur(6px);}
    #stage .step{font-size:9.5px;}
    /* inset sits above the (taller) control bar */
    #inset{width:40vw;max-width:170px;bottom:124px;right:10px;padding:9px;}
    #inset .lbl{font-size:9px;margin-bottom:6px;}
    .chan{font-size:10px;padding:4px 0;}
    #toggleHT{font-size:9.5px;padding:6px;}
    /* controls: bigger tap targets, wrap neatly, respect iOS home bar */
    #controls{bottom:calc(10px + env(safe-area-inset-bottom));gap:7px;padding:8px 9px;
      left:8px;right:8px;transform:none;border-radius:12px;}
    .btn{font-size:12px;padding:9px 11px;min-height:40px;display:flex;align-items:center;}
    .seg button{padding:8px 9px;min-height:36px;font-size:11px;}
    .vdiv{display:none;}
    .ctl-lbl{display:none;}
    #hint{display:none;}
    /* hide the detailed part labels; keep the UNIT and feed/exit labels */
    .lab.part{display:none!important;}
    .lab{font-size:9.5px;padding:2px 5px;}
    /* modal as a bottom sheet above the controls */
    #partModal{right:8px;left:8px;width:auto;max-width:none;top:auto;
      bottom:calc(86px + env(safe-area-inset-bottom));
      transform:translateY(22px);padding:14px;}
    #partModal.open{transform:translateY(0);}
    #partModal .pm-jp{font-size:18px;}
    #partModal .pm-body{font-size:12.5px;}
    .load-card{width:calc(100vw - 38px);padding:24px 20px 22px;}
    .load-title{font-size:16px;}
    .load-sub{font-size:12.5px;}
    .return-visual{right:12px;bottom:calc(12px + env(safe-area-inset-bottom));
      min-height:40px;padding:0 12px;font-size:11px;}
    body.in-guide.near-footer .return-visual{bottom:calc(76px + env(safe-area-inset-bottom));}
  }
  @media (max-width:380px){
    #inset{display:none;}            /* too cramped on very small phones */
    #stage{max-width:70vw;}
  }
  @media (prefers-reduced-motion: reduce){
    #playBtn.paused{animation:none;}
    #playBtn.paused::after{animation:none;opacity:.5;}
  }

  /* ---- landing / article content ---- */
  .lp{background:#f4f6f8;color:#16181d;}
  .lp-section{padding:72px 24px;border-top:1px solid rgba(22,24,29,.10);}
  .lp-section.dark{background:#11131a;color:#f0f3f7;border-top:0;}
  .lp-wrap{max-width:1120px;margin:0 auto;}
  .return-visual{position:fixed;right:18px;bottom:18px;z-index:70;display:inline-flex;
    align-items:center;justify-content:center;gap:6px;min-height:38px;padding:0 14px;border-radius:9px;
    background:#16181d;color:#f0f3f7;border:1px solid rgba(255,255,255,.18);
    box-shadow:0 12px 30px rgba(0,0,0,.24);font-family:var(--mono);font-size:12px;
    letter-spacing:.04em;text-decoration:none;opacity:0;pointer-events:none;transform:translateY(10px);
    transition:opacity .18s,transform .18s,bottom .18s,background .18s;}
  body.in-guide .return-visual{opacity:1;pointer-events:auto;transform:translateY(0);}
  body.in-guide.near-footer .return-visual{bottom:84px;}
  .return-visual:hover{background:#242832;}
  .lp-kicker{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;
    color:#5f6672;margin:0 0 12px;}
  .dark .lp-kicker{color:#a4acb9;}
  .lp h2,.lp h3{letter-spacing:0;line-height:1.35;margin:0;color:inherit;}
  .lp h2{font-size:34px;font-weight:700;}
  .lp h3{font-size:21px;font-weight:700;}
  .lp p{font-size:15.5px;line-height:2;margin:0;color:#4c535d;}
  .lp .section-lead{max-width:920px;margin-top:18px;}
  .lp .maker-lead{margin-top:22px;}
  .lp .small-note{margin-top:22px;font-size:13px;line-height:1.8;color:#68717d;}
  .dark p{color:#c5ccd7;}
  .lp-lead{max-width:760px;margin-top:18px;}
  .lp-lead p+p{margin-top:12px;}
  .lp-head{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:42px;align-items:end;}
  .lp-head-note{border-left:4px solid var(--c);padding-left:18px;}
  .lp-head-note b{display:block;font-family:var(--mono);font-size:12px;letter-spacing:.08em;margin-bottom:8px;color:#dbe6f2;}
  .value-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:36px;}
  .value-card{background:#fff;border:1px solid rgba(22,24,29,.12);border-radius:8px;padding:22px;
    box-shadow:0 10px 28px rgba(18,23,31,.06);}
  .value-card .num{font-family:var(--mono);font-size:12px;color:#7a828d;margin-bottom:12px;}
  .value-card p{margin-top:8px;font-size:14.5px;line-height:1.85;}
  .ink-rule{display:flex;gap:5px;margin-top:16px;}
  .ink-rule span{height:4px;flex:1;border-radius:2px;}
  .ink-c{background:var(--c);}
  .ink-m{background:var(--m);}
  .ink-y{background:var(--y);}
  .ink-k{background:#1a1a1a;}
  .process-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;list-style:none;
    padding:0;margin:36px 0 0;counter-reset:flow;}
  .process-flow li{counter-increment:flow;background:#fff;border:1px solid rgba(22,24,29,.12);
    border-radius:8px;padding:20px;position:relative;min-height:210px;}
  .process-flow li::before{content:counter(flow);font-family:var(--mono);font-size:12px;color:#fff;
    background:#16181d;border-radius:999px;width:28px;height:28px;display:grid;place-items:center;margin-bottom:16px;}
  .process-flow li:nth-child(1){border-top:5px solid #1a1a1a;}
  .process-flow li:nth-child(2){border-top:5px solid var(--c);}
  .process-flow li:nth-child(3){border-top:5px solid var(--m);}
  .process-flow li:nth-child(4){border-top:5px solid var(--y);}
  .process-flow p{margin-top:8px;font-size:14.5px;line-height:1.85;}
  .transfer-diagram{margin-top:34px;padding:28px 0;border-top:1px solid rgba(22,24,29,.12);
    border-bottom:1px solid rgba(22,24,29,.12);}
  .diagram-track{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;gap:12px;}
  .diagram-node{background:#16181d;color:#f0f3f7;border-radius:8px;padding:18px;min-height:120px;}
  .diagram-node strong{display:block;font-size:17px;margin-bottom:8px;}
  .diagram-node span{display:block;font-size:13.5px;line-height:1.75;color:#cbd2dd;}
  .diagram-arrow{display:grid;place-items:center;color:#7b838e;}
  .diagram-arrow svg{width:24px;height:24px;stroke-width:2.1;}
  .caveat-section{background:#eef1f4;}
  .caveat-panel{margin-top:28px;background:#fff;border:1px solid rgba(22,24,29,.12);
    border-radius:8px;padding:24px 26px;}
  .caveat-panel > p{max-width:860px;}
  .caveat-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 22px;
    margin:22px 0 0;padding:0;list-style:none;}
  .caveat-list li{font-size:14.5px;line-height:1.9;color:#4c535d;padding-left:18px;position:relative;}
  .caveat-list li::before{content:"";position:absolute;left:0;top:.83em;width:6px;height:6px;border-radius:50%;
    background:#606875;}
  .caveat-list strong{color:#16181d;}
  .maker-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:32px;}
  .maker-card{background:#fff;border:1px solid rgba(22,24,29,.12);border-radius:8px;padding:20px;
    box-shadow:0 10px 28px rgba(18,23,31,.05);}
  .maker-card span{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
    color:#7a828d;margin-bottom:10px;}
  .maker-card h3{font-size:18px;line-height:1.45;}
  .maker-card h3 small{display:block;font-size:12.5px;line-height:1.45;font-weight:700;color:#68717d;margin-top:3px;}
  .maker-card p{font-size:14px;line-height:1.85;margin-top:8px;}
  .maker-note{margin-top:18px;background:#eef1f4;border:1px solid rgba(22,24,29,.10);
    border-radius:8px;padding:16px 18px;}
  .maker-note strong{display:block;font-size:14px;color:#16181d;margin-bottom:5px;}
  .lp .maker-note p{font-size:13.5px;line-height:1.85;color:#5a626d;margin:0;}
  .related-panel{margin-top:42px;padding-top:32px;border-top:1px solid rgba(22,24,29,.12);}
  .related-panel h3{font-size:24px;}
  .related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px;}
  .related-card{display:grid;grid-template-columns:auto minmax(0,1fr);gap:14px;align-items:start;
    background:#16181d;color:#f0f3f7;border-radius:8px;padding:18px;text-decoration:none;
    border:1px solid rgba(255,255,255,.12);transition:background .18s,transform .18s;}
  .related-card:hover{background:#242832;transform:translateY(-1px);}
  .related-card svg{width:22px;height:22px;color:var(--c);stroke-width:2.1;margin-top:2px;}
  .related-card strong{display:block;font-size:16px;line-height:1.55;}
  .related-card em{display:block;font-style:normal;font-size:13.5px;line-height:1.75;color:#c5ccd7;margin-top:6px;}
  .term-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:34px;}
  .term-item{background:#fff;border:1px solid rgba(22,24,29,.12);border-radius:8px;padding:20px;}
  .term-item dt{font-weight:700;font-size:17px;margin-bottom:6px;}
  .term-item dd{margin:0;color:#4c535d;font-size:14.5px;line-height:1.85;}
  .faq-list{margin-top:30px;border-top:1px solid rgba(22,24,29,.14);}
  .faq-list details{border-bottom:1px solid rgba(22,24,29,.14);padding:18px 0;}
  .faq-list summary{cursor:pointer;font-weight:700;font-size:17px;list-style:none;}
  .faq-list summary::-webkit-details-marker{display:none;}
  .faq-list summary::after{content:"+";float:right;font-family:var(--mono);color:#606875;}
  .faq-list details[open] summary::after{content:"-";}
  .faq-list p{margin-top:10px;max-width:820px;}
  .disclaimer-section{background:#f4f6f8;}
  .disclaimer-section .lp-kicker{margin-bottom:12px;}
  .disclaimer-box{padding-top:0;}
  .disclaimer-box h2{font-size:22px;margin-bottom:10px;}
  .disclaimer-box p{max-width:920px;font-size:14px;line-height:1.9;color:#5a626d;}
  .site-footer{background:#11131a;color:#c5ccd7;padding:34px 24px 42px;border-top:1px solid rgba(255,255,255,.12);}
  .site-footer .lp-wrap{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;}
  .footer-title{font-family:var(--jp);font-size:13px;font-weight:700;color:#f0f3f7;letter-spacing:0;text-transform:none;}
  .footer-links{display:flex;flex-wrap:wrap;gap:8px 10px;align-items:center;font-size:13px;}
  .footer-links a{color:#c5ccd7;text-decoration:none;}
  .footer-links a:hover{color:#fff;text-decoration:underline;}
  .footer-links span{opacity:.36;}
  .doc-page{min-height:100vh;background:#f4f6f8;color:#16181d;}
  .doc-main{max-width:920px;margin:0 auto;padding:58px 24px 78px;}
  .doc-main h1{font-size:36px;line-height:1.3;margin:0 0 12px;}
  .doc-main h2{font-size:22px;margin:34px 0 12px;border-top:1px solid rgba(22,24,29,.12);padding-top:24px;}
  .doc-main p,.doc-main li{font-size:15px;line-height:1.9;color:#4c535d;}
  .doc-main table{width:100%;border-collapse:collapse;margin-top:14px;background:#fff;border-radius:8px;overflow:hidden;}
  .doc-main th,.doc-main td{text-align:left;border-bottom:1px solid rgba(22,24,29,.10);padding:12px 14px;font-size:14px;}
  .doc-main th{font-family:var(--mono);font-size:12px;color:#606875;background:#eef1f4;}
  .doc-main code{font-family:var(--mono);font-size:.9em;background:#eef1f4;border-radius:4px;padding:.15em .4em;
    overflow-wrap:anywhere;word-break:break-word;}
  @media (max-width:820px){
    #app{min-height:560px;}
    .lp-section{padding:54px 18px;}
    .lp h2{font-size:27px;}
    .lp-head{grid-template-columns:1fr;gap:24px;}
    .lp-head-note{max-width:620px;}
    .value-grid,.process-flow,.term-grid,.caveat-list,.maker-grid,.related-grid{grid-template-columns:1fr;}
    .process-flow li{min-height:auto;}
    .diagram-track{grid-template-columns:1fr;gap:8px;}
    .diagram-arrow{transform:rotate(90deg);justify-self:center;}
    .site-footer .lp-wrap{display:block;}
    .footer-links{margin-top:14px;font-size:12px;gap:4px 12px;line-height:1.8;}
    .footer-links a{white-space:nowrap;}
    .footer-links span{display:none;}
    .footer-links a:not(:last-of-type)::after{content:"/";display:inline-block;margin-left:12px;
      color:#c5ccd7;opacity:.36;text-decoration:none;}
  }
  @media (max-width:640px){
    #app{min-height:540px;}
    .site-footer{padding:30px 18px 36px;}
    .footer-title{font-size:12px;line-height:1.6;}
    .footer-links{font-size:11.5px;gap:4px 10px;}
    .footer-links a:not(:last-of-type)::after{margin-left:10px;}
    .doc-main{padding:42px 18px 60px;overflow:hidden;}
    .doc-main h1{font-size:30px;}
    .doc-main table,.doc-main thead,.doc-main tbody,.doc-main tr,.doc-main th,.doc-main td{display:block;width:100%;}
    .doc-main thead{display:none;}
    .doc-main table{background:transparent;border-radius:0;overflow:visible;}
    .doc-main tr{background:#fff;border:1px solid rgba(22,24,29,.12);border-radius:8px;
      padding:10px 12px;margin-top:10px;}
    .doc-main td{border-bottom:0;padding:8px 0;font-size:13.5px;}
    .doc-main td+td{border-top:1px solid rgba(22,24,29,.08);}
    .doc-main td::before{content:attr(data-label);display:block;font-family:var(--mono);font-size:10.5px;
      letter-spacing:.08em;color:#606875;margin-bottom:3px;}
    .doc-main code{display:inline-block;max-width:100%;white-space:normal;}
  }