.onepo-jigsaw-app{--ink:#1b1d1c;--paper:#f3f0e8;--cream:#faf8f2;--orange:#e3542f;--muted:#777770;--line:#d8d3c8}.onepo-jigsaw-app,.onepo-jigsaw-app *{box-sizing:border-box}.onepo-jigsaw-standalone{color:var(--ink);background:radial-gradient(circle at 7% 18%, #fffc, transparent 24rem), var(--paper);font-family:var(--font-sans), "Microsoft YaHei", sans-serif;margin:0}.onepo-jigsaw-app button,.onepo-jigsaw-app input,.onepo-jigsaw-app select{font:inherit}.onepo-jigsaw-app button{color:inherit}.shell{width:min(1440px,100%);min-height:100vh;color:var(--ink);background:radial-gradient(circle at 7% 18%, #fffc, transparent 24rem), var(--paper);font-family:var(--font-sans), "Microsoft YaHei", sans-serif;margin:0 auto;padding:0 5vw}.shell.is-embedded{width:100%;min-height:0;padding:0 clamp(20px,4vw,64px)}.shell.is-embedded .hero{min-height:clamp(720px,100vh - 110px,940px)}.topbar{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;height:92px;display:flex}.brand{color:var(--ink);align-items:center;text-decoration:none;display:flex}.brand-logo{object-fit:contain;width:74px;height:50px;transition:transform .2s;display:block}.brand:hover .brand-logo{transform:translateY(-2px)}.top-actions{align-items:center;gap:22px;display:flex}.embedded-actions{flex-wrap:wrap;align-items:center;gap:16px;margin:-12px 0 34px;display:flex}.language-picker{color:var(--muted);letter-spacing:.12em;text-transform:uppercase;align-items:center;gap:8px;font-size:10px;font-weight:700;display:flex}.language-picker select{border:1px solid var(--line);width:126px;min-height:34px;color:var(--ink);cursor:pointer;letter-spacing:0;text-transform:none;background:#ffffff6b;border-radius:3px;padding:0 28px 0 10px;font-size:12px;font-weight:600}.primary,.text-button,.export-button,.icon-button,.level,.tile{cursor:pointer;border:0}.primary{color:#fff;background:var(--orange);letter-spacing:.04em;border-radius:3px;min-height:48px;padding:0 27px;font-weight:600;transition:transform .2s,background .2s;box-shadow:0 8px 22px #ab37192e}.primary:hover{background:#c94524;transform:translateY(-2px)}.primary.small{min-height:42px;padding:0 22px}.text-button{background:0 0;border-bottom:1px solid;padding:8px 0;font-size:14px;font-weight:600}.export-button{min-height:42px;color:var(--orange);border:1px solid var(--orange);background:0 0;border-radius:3px;padding:0 18px;font-size:13px;font-weight:600;transition:color .2s,background .2s}.export-button:hover{color:#fff;background:var(--orange)}.export-button:disabled{cursor:wait;opacity:.55}.hero{grid-template-columns:minmax(300px,.85fr) minmax(520px,1.3fr);align-items:center;gap:clamp(50px,7vw,110px);min-height:calc(100vh - 165px);padding:58px 0 50px;display:grid}.intro{align-self:center;max-width:490px}.eyebrow{color:var(--orange);letter-spacing:.24em;margin:0 0 24px;font-size:11px;font-weight:700}.onepo-jigsaw-app h1{font-family:var(--font-display), "Songti SC", serif;letter-spacing:-.04em;margin:0;font-size:clamp(48px,5.4vw,82px);font-weight:600;line-height:1.05}.onepo-jigsaw-app h1 em{color:var(--orange);font-weight:600}.lede{color:#676762;max-width:420px;margin:28px 0 42px;font-size:16px;line-height:1.9}.difficulty>span{color:var(--muted);letter-spacing:.14em;margin-bottom:12px;font-size:12px;font-weight:600;display:block}.level-list{border:1px solid var(--line);background:#ffffff52;grid-template-columns:repeat(5,1fr);display:grid}.level{border-right:1px solid var(--line);background:0 0;padding:14px 8px;transition:background .2s,color .2s;position:relative}.level:last-child{border-right:0}.level strong,.level small{display:block}.level strong{margin-bottom:2px;font-size:14px}.level small{color:var(--muted);font-size:10px}.level.active{color:#fff;background:var(--ink)}.level.active small{color:#c8c8c2}.shape-setting{justify-content:space-between;align-items:center;gap:16px;margin-top:16px;display:flex}.shape-setting strong,.shape-setting small{display:block}.shape-setting strong{font-size:12px}.shape-setting small{color:var(--muted);margin-top:2px;font-size:10px}.segmented{background:#e4e0d6;border-radius:3px;flex:none;padding:3px;display:flex}.segmented button{min-height:31px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:2px;padding:0 11px;font-size:10px;font-weight:600}.segmented button.active{color:#fff;background:var(--orange)}.game-column{justify-self:end;width:min(100%,780px)}.game-toolbar{grid-template-columns:88px 88px 1fr 42px;align-items:center;gap:22px;margin-bottom:16px;display:grid}.stat{border-right:1px solid var(--line)}.stat span,.progress-label span{color:var(--muted);letter-spacing:.12em;font-size:10px;font-weight:600;display:block}.stat strong{font-family:var(--font-display), serif;font-variant-numeric:tabular-nums;margin-top:3px;font-size:24px;display:block}.progress-wrap{min-width:130px}.progress-label{justify-content:space-between;align-items:center;display:flex}.progress-label span{display:inline}.progress-label strong{color:var(--orange);font-size:11px}.progress{background:var(--line);height:3px;margin-top:8px;overflow:hidden}.progress i{background:var(--orange);height:100%;transition:width .35s;display:block}.icon-button{border:1px solid var(--line);background:0 0;border-radius:50%;width:40px;height:40px;font-size:21px;transition:transform .25s}.icon-button:hover{transform:rotate(-45deg)}.board-frame{background:#171918;padding:0;position:relative;overflow:hidden;box-shadow:0 28px 60px #2e271e38}.jigsaw-canvas{cursor:grab;touch-action:none;-webkit-user-select:none;user-select:none;background:#ece8de;width:100%;height:auto;display:block}.jigsaw-canvas:active{cursor:grabbing}.game-tip{color:var(--muted);text-align:center;margin:18px 0 0;font-size:12px}.game-tip span{color:var(--orange);margin-right:6px}.game-footer{border-top:1px solid var(--line);min-height:73px;color:var(--muted);letter-spacing:.08em;justify-content:space-between;align-items:center;font-size:11px;display:flex}.game-footer p{font-family:var(--font-display), serif;color:var(--ink);font-size:14px}.modal-backdrop{z-index:20;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#131413b8;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.win-card{text-align:center;background:var(--cream);width:min(440px,100%);padding:48px;animation:.4s both rise;box-shadow:0 35px 90px #0000004d}.win-icon{color:var(--orange);margin-bottom:18px;font-size:32px;display:block}.win-card .eyebrow{margin-bottom:12px}.win-card h2{font-family:var(--font-display), serif;margin:0;font-size:42px}.win-card p:not(.eyebrow){color:var(--muted);margin:18px 0 28px;line-height:1.7}.win-card .primary,.win-card .text-button{margin:14px auto 0;display:block}@keyframes rise{0%{opacity:0;transform:translateY(18px)scale(.98)}}@media (width<=900px){.shell{padding:0 22px}.hero{grid-template-columns:1fr;gap:42px;padding-top:44px}.intro{max-width:660px}.lede{max-width:560px}.game-column{justify-self:center}}@media (width<=560px){.topbar{height:76px}.top-actions{gap:10px}.language-picker>span{display:none}.language-picker select{width:62px;padding:0 6px}.top-actions .text-button{display:none}.export-button{padding:0 12px}.hero{padding:36px 0}.onepo-jigsaw-app h1{font-size:48px}.lede{margin:22px 0 30px}.level-list{grid-template-columns:repeat(5,minmax(68px,1fr));overflow-x:auto}.shape-setting{flex-direction:column;align-items:flex-start}.game-toolbar{grid-template-columns:72px 72px 1fr 38px;gap:10px}.stat strong{font-size:20px}.game-footer{align-items:flex-start;padding:22px 0}.game-footer p{margin:0}.game-footer span{text-align:right}}@media (prefers-reduced-motion:reduce){.onepo-jigsaw-app *,.onepo-jigsaw-app :before,.onepo-jigsaw-app :after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}