:root{color-scheme:light;--bg: #f3f6fb;--card: #ffffff;--text: #1f2937;--muted: #6b7280;--primary: #2563eb;--primary-hover: #1d4ed8;--border: #dbe3f0;--shadow: 0 12px 30px rgba(37, 99, 235, .12);--focus-ring: #0f766e;--error: #dc2626;--success: #059669;--car-red: #dc2626;--car-blue: #2563eb;--car-green: #059669;--car-yellow: #ca8a04;--car-orange: #ea580c;--car-purple: #7c3aed;--car-cyan: #0891b2;--car-teal: #0f766e;--car-pink: #db2777;--car-brown: #92400e;--car-slate: #64748b;--car-lime: #65a30d}*{box-sizing:border-box}html,body{margin:0;min-height:100%}body{color:var(--text);background:var(--bg);font-family:Inter,PingFang SC,Microsoft YaHei,sans-serif}.skip-link{position:fixed;top:8px;left:8px;z-index:200;padding:10px 14px;border-radius:8px;color:#fff;background:#111827}.skip-link:not(:focus){width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.topbar{min-height:70px;display:flex;align-items:center;gap:24px;padding:0 max(22px,calc((100% - 880px)/2));background:var(--card);border-bottom:1px solid var(--border)}.topbar div{display:flex;flex:1;flex-direction:column;min-width:0}.topbar a{color:var(--muted);text-decoration:none;font-weight:700}.topbar a:hover,.topbar a:focus-visible{color:var(--primary)}.topbar small{margin-top:3px;color:var(--muted)}main{max-width:880px;margin:0 auto;padding:28px 22px 64px}.hero span,.hrd-copy span,.game-card span{color:var(--primary);font-size:.72rem;font-weight:800;letter-spacing:.14em}.hero h1,.hrd-copy h1{margin:8px 0;font-size:2rem}.hero p,.hrd-copy p{margin:0;color:var(--muted);line-height:1.6}.game-grid{display:grid;gap:16px;margin-top:28px}.game-card,.hrd-stats,.hrd-board,.hrd-pad,.gate-dialog,.level-chip{border:1px solid var(--border);background:var(--card);box-shadow:var(--shadow)}.game-card{display:grid;grid-template-columns:112px 1fr;gap:18px;padding:18px;border-radius:18px;color:inherit;text-decoration:none}.game-card:hover,.game-card:focus-visible{border-color:color-mix(in srgb,var(--primary) 45%,var(--border))}.game-card h2{margin:6px 0;font-size:1.35rem}.game-card p{margin:0;color:var(--muted);line-height:1.55}.game-thumb{display:grid;grid-template-columns:1.6fr 1fr 1fr;grid-template-rows:1fr 1fr 1.2fr;gap:6px;min-height:112px;padding:10px;border-radius:14px;background:#eef3ff}.game-thumb i{border-radius:8px;background:#93c5fd}.game-thumb i:first-child{grid-column:1 / 3;background:#f87171}.game-thumb i:nth-child(2){background:#34d399}.game-thumb i:nth-child(3){grid-row:2 / 4;background:#fbbf24}.game-thumb.beads{grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(2,1fr);align-items:center;justify-items:center}.game-thumb.beads i{grid-row:auto;width:22px;height:22px;border-radius:50%;background:#dc2626}.game-thumb.beads i:nth-child(2){background:#2563eb}.game-thumb.beads i:nth-child(3){background:#ca8a04}.game-thumb.beads i:nth-child(4){background:#2563eb}.game-thumb.beads i:nth-child(5){background:#dc2626}.game-thumb.beads i:nth-child(6){background:#ca8a04}.level-list{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 16px}.level-chip{display:flex;flex-direction:column;align-items:flex-start;gap:2px;min-height:52px;padding:8px 12px;border-radius:12px;color:var(--text);cursor:pointer;font:inherit;box-shadow:none}.level-chip small{color:var(--muted)}.level-chip.active,.level-chip[aria-current=true]{border-color:color-mix(in srgb,var(--primary) 50%,var(--border));background:color-mix(in srgb,var(--primary) 10%,var(--card));color:var(--primary)}.hrd-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:14px;padding:14px;border-radius:16px;box-shadow:none}.hrd-stats span,.selected-line{color:var(--muted)}.hrd-stats strong{display:block;margin-top:4px;font-size:1.15rem}.selected-line{margin:0 0 16px}.hrd-stage{display:grid;grid-template-columns:minmax(0,380px) 150px;justify-content:center;align-items:center;gap:22px}.hrd-board{--cell: calc(100% / 6);position:relative;width:min(380px,100%);aspect-ratio:1;margin-right:1.6rem;touch-action:none;user-select:none;border:3px solid #94a3b8;border-right:0;border-radius:18px 0 0 18px;background:repeating-linear-gradient(to right,transparent,transparent calc(var(--cell) - 1px),color-mix(in srgb,var(--border) 80%,transparent) calc(var(--cell) - 1px),color-mix(in srgb,var(--border) 80%,transparent) var(--cell)),repeating-linear-gradient(to bottom,transparent,transparent calc(var(--cell) - 1px),color-mix(in srgb,var(--border) 80%,transparent) calc(var(--cell) - 1px),color-mix(in srgb,var(--border) 80%,transparent) var(--cell)),#e8eef8}.hrd-board:before,.hrd-board:after{position:absolute;pointer-events:none}.hrd-board:before{content:"";top:0;right:0;bottom:0;width:3px;background:linear-gradient(to bottom,#94a3b8 0 calc(100% / 3),transparent calc(100% / 3) 50%,#94a3b8 50% 100%)}.hrd-board:after{content:"\8f66\5e93";top:calc(100% / 3);right:-1.7rem;height:calc(100% / 6);width:1.5rem;color:#92400e;font-size:.75rem;font-weight:800;writing-mode:vertical-rl;text-orientation:mixed;letter-spacing:.12em;display:grid;place-items:center}.hrd-piece,.hrd-empty{position:absolute;left:calc(var(--c) * var(--cell) + 2px);top:calc(var(--r) * var(--cell) + 2px);width:calc(var(--w, 1) * var(--cell) - 4px);height:calc(var(--h, 1) * var(--cell) - 4px)}.hrd-empty{pointer-events:none}.hrd-piece{display:grid;place-items:center;border:0;border-radius:10px;color:#fff;background:var(--car-slate);box-shadow:inset 0 0 0 2px color-mix(in srgb,#fff 18%,transparent);cursor:pointer;font:inherit;font-size:.78rem;font-weight:800;transition:transform .16s ease,box-shadow .16s ease}.hrd-piece.car-h,.hrd-piece.car-v{border-radius:999px}.hrd-piece.selected{box-shadow:0 0 0 3px color-mix(in srgb,var(--focus-ring) 70%,transparent),inset 0 0 0 2px #fff;transform:translateZ(0) scale(.985);z-index:2}.hrd-piece.piece-red{background:var(--car-red);font-size:.92rem}.hrd-piece.piece-blue{background:var(--car-blue)}.hrd-piece.piece-green{background:var(--car-green)}.hrd-piece.piece-yellow{background:var(--car-yellow)}.hrd-piece.piece-orange{background:var(--car-orange)}.hrd-piece.piece-purple{background:var(--car-purple)}.hrd-piece.piece-cyan{background:var(--car-cyan)}.hrd-piece.piece-teal{background:var(--car-teal)}.hrd-piece.piece-pink{background:var(--car-pink)}.hrd-piece.piece-brown{background:var(--car-brown)}.hrd-piece.piece-slate{background:var(--car-slate)}.hrd-piece.piece-lime{background:var(--car-lime)}.hrd-piece.shake{animation:hrd-shake .2s ease}@keyframes hrd-shake{25%{transform:translate(-4px)}75%{transform:translate(4px)}}.hrd-pad{display:grid;justify-items:center;gap:8px;padding:14px;border-radius:16px}.pad-mid{display:flex;gap:8px}.pad-btn,.btn{min-height:44px;min-width:44px;border:1px solid var(--border);border-radius:10px;background:var(--card);color:var(--text);cursor:pointer;font:inherit;font-weight:700}.pad-btn:hover,.btn:hover,.level-chip:hover{background:color-mix(in srgb,var(--text) 5%,var(--card))}.hrd-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.btn{padding:0 16px}.btn.primary{color:#fff;background:var(--primary);border-color:var(--primary)}.btn.primary:hover{background:var(--primary-hover)}.status-live{min-height:1.4em;margin:14px 0 0;color:var(--muted)}[hidden]{display:none!important}.gate-backdrop{position:fixed;inset:0;z-index:40;display:grid;place-items:center;padding:20px;background:color-mix(in srgb,#0f172a 42%,transparent)}.gate-dialog{width:min(420px,100%);padding:28px 24px;border-radius:18px;text-align:center}.gate-lock{display:inline-grid;place-items:center;width:48px;height:48px;margin-bottom:8px;border-radius:14px;color:#fff;background:var(--success);font-weight:800}.gate-actions{display:flex;justify-content:center;gap:8px;margin-top:16px}:focus-visible{outline:3px solid color-mix(in srgb,var(--focus-ring) 70%,transparent);outline-offset:2px}html[data-appearance=forest]{--primary: #12805c;--primary-hover: #0f6b4d}html[data-appearance=space]{--primary: #0ea5e9}html[data-appearance=paper]{--primary: #b9482b}html[data-theme=dark]{color-scheme:dark;--bg: #0f172a;--card: #172033;--text: #e5edf8;--muted: #a9b8cc;--border: #334155;--shadow: 0 12px 30px rgba(0, 0, 0, .28);--car-slate: #94a3b8}html[data-theme=dark] .hrd-board{background-color:#1e293b}html[data-theme=dark] .game-thumb{background:#1e293b}html[data-reduce-motion] *,html[data-reduce-motion] *:before,html[data-reduce-motion] *:after{transition:none!important;animation:none!important}.bead-stage{display:grid;gap:10px}.bead-string{display:grid;grid-template-columns:36px minmax(0,1fr) auto;align-items:center;gap:10px;min-height:56px;padding:8px 10px;border:1px solid var(--border);border-radius:14px;background:var(--card);color:inherit;cursor:pointer;font:inherit;text-align:left;box-shadow:var(--shadow)}.bead-string.selected{border-color:color-mix(in srgb,var(--focus-ring) 55%,var(--border));box-shadow:0 0 0 3px color-mix(in srgb,var(--focus-ring) 35%,transparent)}.bead-string.locked{background:color-mix(in srgb,var(--success) 10%,var(--card))}.bead-string.empty{border-style:dashed;box-shadow:none}.bead-string.shake{animation:hrd-shake .2s ease}.string-index{display:grid;place-items:center;width:32px;height:32px;border-radius:10px;color:var(--muted);background:color-mix(in srgb,var(--text) 6%,var(--card));font-weight:800}.bead-track{display:flex;flex-wrap:wrap;align-items:center;gap:4px;min-height:36px}.empty-hint{color:var(--muted);font-size:.9rem}.lock-badge{display:grid;place-items:center;min-width:32px;height:32px;border-radius:10px;color:#fff;background:var(--success);font-weight:800}.bead{width:36px;height:36px;flex:0 0 36px;border-radius:50%;box-shadow:inset 0 0 0 2px color-mix(in srgb,#fff 22%,transparent)}.bead-red{background:#dc2626}.bead-yellow{background:#ca8a04}.bead-blue{background:#2563eb}.bead-green{background:#059669}.bead-orange{background:#ea580c}.bead-purple{background:#7c3aed}html[data-theme=dark] .bead-string{background:var(--card)}@media(max-width:700px){.hrd-stage{grid-template-columns:1fr}.hrd-pad{justify-self:center}.game-card{grid-template-columns:1fr}}@media(max-width:480px){main{padding:22px 14px 48px}.topbar{gap:12px;padding:0 14px}.hrd-stats{grid-template-columns:repeat(2,1fr)}.hero h1,.hrd-copy h1{font-size:1.6rem}}