:root{--navy:#003057;--ink:#14213d;--paper:#fafaf6;--white:#fff;--rule:#e5e7eb;--coral:#f47b55;--yellow:#ffd629;--aqua:#00d5c3;--cobalt:#246bfe;--success:#146c43;--error:#b3261e;--muted:#586b7a;--mist:#edf5f4;--max:1220px;--shadow:8px 8px 0 var(--ink)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);color:var(--ink);margin:0;font-family:Inter,Noto Sans SC,Microsoft YaHei,Arial,sans-serif;line-height:1.55}button,a{font:inherit;color:inherit}button:focus-visible{outline:3px solid var(--cobalt);outline-offset:3px}a:focus-visible{outline:3px solid var(--cobalt);outline-offset:3px}[tabindex]:focus-visible{outline:3px solid var(--cobalt);outline-offset:3px}button{min-height:44px}.section-pad{padding:104px max(24px,calc((100vw - var(--max))/2))}.eyebrow{letter-spacing:.16em;text-transform:uppercase;font-size:11px;font-weight:900}.section-head{max-width:790px;margin-bottom:50px}.section-head 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var(--ink);cursor:grab;font-size:28px;font-weight:900}.digit-bank button.selected,.token-bank button.selected,.training-cards button.selected{background:var(--aqua);transform:translateY(-5px)}.place-house{border:3px solid var(--ink);border-top:28px solid var(--coral);grid-template-columns:repeat(3,1fr);width:100%;max-width:710px;margin:0 auto;display:grid;position:relative}.place-house:before{content:"数位屋";color:var(--white);font-size:10px;font-weight:900;position:absolute;top:-23px;left:10px}.place-slot{border:0;border-right:2px solid var(--ink);background:var(--paper);cursor:pointer;flex-direction:column;justify-content:center;align-items:center;min-height:150px;display:flex}.place-slot:last-child{border-right:0}.place-slot span{color:var(--muted);font-size:10px;font-weight:900}.place-slot b{color:var(--navy);font-size:56px;line-height:1.2}.place-slot small{font-size:9px}.expanded-form{background:var(--navy);color:var(--white);font-variant-numeric:tabular-nums;margin:18px auto 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