:root{--nav-height: 60px;--header-height: 44px;--bg-color: #f0f2f5;--bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);--primary-color: #6366f1;--primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);--text-main: #1e293b;--text-sub: #64748b;--glass-bg: rgba(255, 255, 255, .75);--glass-border: rgba(255, 255, 255, .8);--shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, .05);--shadow-float: 0 10px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .05)}body{margin:0;padding:0;background:var(--bg-color);background-image:var(--bg-gradient);background-attachment:fixed;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,Roboto,Helvetica,Arial,sans-serif;overflow:hidden;-webkit-tap-highlight-color:transparent;color:var(--text-main)}button{font-family:inherit;font-weight:600;letter-spacing:.5px}.action-btn,.start-btn{background:var(--primary-gradient);color:#fff;border:none;padding:8px 16px;border-radius:10px;font-size:13px;cursor:pointer;box-shadow:0 4px 10px #6366f14d;transition:transform .1s,box-shadow .1s}.action-btn:active{transform:translateY(1px);box-shadow:0 2px 5px #6366f133}button:disabled{background:#cbd5e1;box-shadow:none;cursor:not-allowed;opacity:.7}@keyframes popFadeOut{0%{transform:scale(1);opacity:1}50%{transform:scale(1.1);opacity:.8}to{transform:scale(0);opacity:0}}@keyframes popIn{0%{transform:scale(0)}70%{transform:scale(1.2)}to{transform:scale(1)}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes fadeIn{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@keyframes shakeError{10%,90%{transform:translate(-2px)}50%{transform:translate(2px)}}@keyframes pulse{0%,to{opacity:.8;transform:scale(1)}50%{opacity:1;transform:scale(1.1)}}.app-container{height:100dvh;width:100vw;display:flex;flex-direction:column;max-width:500px;margin:0 auto;background:transparent;position:relative;box-shadow:0 0 50px #00000014}.main-content{flex:1;overflow-y:auto;overflow-x:hidden;display:flex;flex-direction:column;padding:0;padding-bottom:calc(var(--nav-height) + 20px + env(safe-area-inset-bottom))}.bottom-nav{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:500px;height:calc(var(--nav-height) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fffffff2;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid #e2e8f0;display:flex;justify-content:space-around;align-items:center;z-index:1000}.nav-item{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;height:100%;color:#94a3b8;background:none;border:none}.nav-item.active{color:var(--primary-color)}.smart-header{height:var(--header-height);width:100%;display:flex;align-items:center;justify-content:space-between;padding:0 16px;box-sizing:border-box;background:var(--glass-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,.3);z-index:100;flex-shrink:0;padding-top:env(safe-area-inset-top);box-shadow:var(--shadow-sm)}.header-left-group{display:flex;align-items:center;gap:8px;flex:1;overflow:hidden}.back-btn{border:none;background:transparent;color:var(--text-sub);width:28px;height:28px;display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;padding:0;border-radius:50%;transition:background .2s}.back-btn:active{background:#0000000d}.header-title{margin:0;font-size:15px;font-weight:700;color:var(--text-main);letter-spacing:-.5px}.header-right-group{display:flex;align-items:center;gap:8px;flex-shrink:0}.stat-pill{display:flex;align-items:center;gap:4px;padding:4px 10px;border-radius:20px;font-size:10px;font-weight:700;box-shadow:inset 0 1px 2px #0000000d}.stat-pill.xp{background:#f3e8ff;color:#7c3aed;border:1px solid rgba(124,58,237,.1)}.stat-pill.coin{background:#fffbeb;color:#d97706;border:1px solid rgba(217,119,6,.1)}.music-control{width:32px;height:32px;border-radius:50%;background:#fff;display:flex;align-items:center;justify-content:center;color:var(--text-sub);cursor:pointer;margin-right:2px;box-shadow:0 2px 5px #0000000d;transition:transform .2s}.music-control:active{transform:scale(.9)}.music-control.playing{background:var(--primary-gradient);color:#fff;animation:pulse 2s infinite;box-shadow:0 4px 10px #6366f166}.game-viewport{flex:1;width:100%;background-color:#84cc16;overflow:hidden;position:relative;scrollbar-width:none;perspective:1200px;display:flex;align-items:center;justify-content:center}.game-viewport::-webkit-scrollbar{display:none}.large-map{display:grid;grid-template-columns:repeat(16,40px);grid-template-rows:repeat(16,40px);padding:40px;width:max-content;transform:rotateX(60deg) rotate(45deg);transform-style:preserve-3d;box-shadow:20px 20px #0003;background:#ffffff1a;margin:100px}.grid-cell{width:40px;height:40px;background-color:#a3e635;border:1px solid #84cc16;box-shadow:inset 0 0 10px #0000000d;display:flex;align-items:center;justify-content:center;font-size:24px;position:relative;box-sizing:border-box;transform-style:preserve-3d}.grid-cell:hover{background-color:#bef264;transform:translateZ(10px);box-shadow:0 10px 20px #0003;transition:transform .2s}.placed-item{width:100%;height:100%;display:flex;align-items:center;justify-content:center;animation:dropIn .2s ease-out;font-size:300%;transform:rotate(-45deg) rotateX(-60deg) translateY(-50%) scale(1.5);filter:drop-shadow(5px 10px 0px rgba(0,0,0,.2));position:absolute;bottom:10px;pointer-events:none;z-index:10}.hotbar-container{position:fixed;bottom:calc(var(--nav-height) + 15px + env(safe-area-inset-bottom));left:50%;transform:translate(-50%);z-index:900;display:flex;gap:5px;background:#0009;padding:5px;border-radius:12px;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);box-shadow:0 4px 15px #0003}.hotbar-slot{width:44px;height:44px;background:#fff3;border:2px solid transparent;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:20px;cursor:pointer;position:relative;color:#fff}.hotbar-slot.active{border-color:#fbbf24;background:#fff6;transform:scale(1.1)}.slot-count{position:absolute;bottom:2px;right:2px;font-size:9px;font-weight:700;text-shadow:0 1px 2px black}.fab-inventory{position:fixed;top:80px;left:20px;width:50px;height:50px;background:var(--primary-color);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 15px #6366f166;cursor:pointer;z-index:1100;transition:transform .2s}.fab-inventory:active{transform:scale(.9)}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#00000080;z-index:2000;display:flex;align-items:center;justify-content:center;animation:fadeIn .2s}.modal-content{background:#fff;width:85%;max-width:340px;border-radius:20px;padding:20px;box-shadow:0 20px 50px #0003;animation:slideUp .3s cubic-bezier(.175,.885,.32,1.275);display:flex;flex-direction:column;gap:15px}.modal-title{font-size:16px;font-weight:800;color:#1e293b;text-align:center}.inventory-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.inv-item{background:#f1f5f9;border-radius:12px;padding:10px 5px;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;border:2px solid transparent;position:relative}.inv-item.active{border-color:var(--primary-color);background:#e0e7ff}.inv-count{position:absolute;top:-5px;right:-5px;background:#ef4444;color:#fff;font-size:10px;padding:2px 6px;border-radius:10px}.inv-icon{font-size:24px;margin-bottom:2px}.inv-name{font-size:10px;color:#64748b}.shop-scroll{padding:15px}.shop-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;background:transparent;box-shadow:none;border:none}.shop-item{background:#fff;border-radius:20px;padding:20px 15px;box-shadow:0 10px 25px -5px #0000000d,0 5px 10px -5px #00000005;border:1px solid rgba(255,255,255,.8);display:flex;flex-direction:column;align-items:center;position:relative;transition:all .2s cubic-bezier(.25,.8,.25,1)}.shop-item:active{transform:scale(.97);box-shadow:0 5px 15px -5px #0000000d}.shop-icon{font-size:36px;margin-bottom:10px;filter:drop-shadow(0 4px 6px rgba(0,0,0,.08))}.item-name{font-size:14px;font-weight:700;margin-bottom:5px;color:#1e293b}.shop-desc{font-size:10px;color:#94a3b8;margin-bottom:8px;text-align:center}.item-price{display:inline-block;background:#fffbeb;color:#d97706;font-weight:700;font-size:12px;padding:4px 10px;border-radius:12px;border:1px solid rgba(217,119,6,.1);margin-top:5px;margin-bottom:10px}.buy-btn{width:100%;margin-top:5px;padding:8px 0;font-size:13px;border-radius:12px;background:linear-gradient(135deg,#6366f1,#8b5cf6);border:none;box-shadow:0 4px 10px #6366f140;color:#fff;cursor:pointer}.buy-btn:active{transform:translateY(1px);box-shadow:0 2px 5px #6366f133}.progress-area{padding:5px 15px 0;flex-shrink:0;display:flex;flex-direction:column;justify-content:center}.progress-bar-bg{width:100%;height:3px;background:#e2e8f0;border-radius:2px;overflow:hidden}.progress-text{font-size:9px;text-align:right;margin:2px 0 0;color:#94a3b8}.mode-switch{display:flex;background:#f1f5f9;padding:2px;border-radius:20px;margin:5px auto;width:75%;flex-shrink:0}.switch-btn{flex:1;padding:4px;border-radius:18px;border:none;background:transparent;color:#64748b;font-size:11px;font-weight:600;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center;gap:4px}.switch-btn.active{background:#fff;color:var(--primary-color);box-shadow:0 2px 5px #00000014}.studio-stage{position:relative;width:100%;display:flex;justify-content:center;align-items:flex-start;padding-top:10px;perspective:1000px;flex:1}.card-wrapper{width:76%;height:440px;max-height:60dvh;position:relative;margin-top:20px}.card-scene{position:absolute;top:0;left:0;width:100%;height:100%;cursor:pointer}.card{width:100%;height:100%;position:relative;transition:transform .6s cubic-bezier(.2,.8,.2,1);transform-style:preserve-3d;border-radius:24px;box-shadow:0 15px 30px -5px #00000026}.card.flipped{transform:rotateY(180deg)}.card-face{position:absolute;top:0;left:0;width:100%;height:100%;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:24px;display:flex;flex-direction:column;align-items:center;padding:15px;box-sizing:border-box;background:#fff}.card-back{transform:rotateY(180deg);justify-content:space-between;border:1px solid rgba(0,0,0,.05)}.nav-arrow{position:absolute;top:50%;transform:translateY(-50%);background:transparent;border:none;box-shadow:none;width:44px;height:44px;display:flex;align-items:center;justify-content:center;color:#4ade80;filter:drop-shadow(0 0 5px rgba(74,222,128,.6));z-index:10;transition:all .3s cubic-bezier(.175,.885,.32,1.275)}.nav-arrow svg{stroke-width:3px;width:32px;height:32px}.nav-arrow:hover{background:transparent;color:#22c55e;transform:translateY(-50%) scale(1.2);filter:drop-shadow(0 0 10px rgba(74,222,128,1))}.nav-arrow.left{left:-20px}.nav-arrow.right{right:-20px}.nav-arrow:hover{background:#f8fafc;color:var(--primary-color);transform:translateY(-50%) scale(1.1)}.nav-arrow.left{left:-10px}.nav-arrow.right{right:-10px}.game-board-container{width:100%;flex:1;overflow-y:auto;overflow-x:hidden;padding:5px 15px;box-sizing:border-box;display:flex;flex-direction:column;justify-content:center}.game-board{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;width:100%;box-sizing:border-box;padding-bottom:20px}.game-tile{background:#fff;border:2px solid #e2e8f0;border-radius:14px;padding:5px;text-align:center;font-size:13px;font-weight:600;color:#475569;display:flex;align-items:center;justify-content:center;height:60px;width:100%;box-sizing:border-box;cursor:pointer;transition:transform .1s;box-shadow:0 3px #e2e8f0;word-break:break-all;position:relative}.game-tile:active{transform:translateY(3px);box-shadow:none}.game-tile.selected{border-color:#6366f1;background:#e0e7ff;color:#4338ca;box-shadow:0 2px #c7d2fe;transform:translateY(2px)}.game-tile.matched{background:#22c55e;border-color:#16a34a;color:#fff;box-shadow:none;animation:popFadeOut .5s forwards;pointer-events:none}.game-tile.wrong{background:#fee2e2;border-color:#ef4444;color:#b91c1c;animation:shakeError .4s}.subject-menu-container{padding-top:25px;display:flex;flex-direction:column;align-items:center}.subject-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;width:100%;padding:0 15px;box-sizing:border-box}.subject-card{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:15px 5px;border-radius:20px;border:none;cursor:pointer;transition:all .2s;box-shadow:0 6px 15px #00000008;text-align:center;width:100%;aspect-ratio:1.1;position:relative;overflow:hidden}.subject-card:active{transform:scale(.96)}.subject-card h3{margin:8px 0 2px;font-size:13px;font-weight:800}.subject-card span{font-size:9px;opacity:.7;font-weight:500}.mystery-face{background-color:#f1f5f9;background-image:none;border:none;animation:none;color:transparent;justify-content:center;position:relative;overflow:hidden;background-size:102%;background-position:center;background-repeat:no-repeat;box-shadow:inset 0 0 20px #0000000d}.mystery-face:before{display:none}.mystery-mark{display:none}.bookshelf-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;padding:15px}.book-card{display:flex;flex-direction:column;align-items:center;cursor:pointer;transition:transform .2s;background:#fff;border-radius:12px;padding:10px;box-shadow:0 2px 8px #00000008;border:1px solid rgba(0,0,0,.02)}.book-card:active{transform:scale(.95)}.book-cover{width:100%;aspect-ratio:2/3;background:#e2e8f0;border-radius:6px;box-shadow:2px 4px 10px #0000001a;display:flex;align-items:center;justify-content:center;text-align:center;font-size:11px;font-weight:700;color:#fff;padding:5px;box-sizing:border-box;margin-bottom:6px;position:relative;overflow:hidden}.book-cover:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:#fff3}.book-title{font-size:10px;font-weight:700;color:#334155;text-align:center;line-height:1.2;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.book-author{font-size:9px;color:#94a3b8;margin-top:2px}.reader-container{position:fixed;top:0;left:0;width:100%;height:100%;background:#fdf6e3;z-index:2000;display:flex;flex-direction:column;animation:slideUp .3s ease-out}.reader-header{padding:10px 15px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(0,0,0,.05);background:#fdf6e3f2;padding-top:max(10px,env(safe-area-inset-top))}.reader-content{flex:1;overflow-y:auto;padding:20px 25px 100px;font-family:Songti SC,SimSun,serif;font-size:18px;line-height:1.8;color:#2c2c2c}.noise-menu{position:absolute;top:50px;right:10px;background:#fff;padding:10px;border-radius:12px;box-shadow:0 10px 30px #0000001a;display:flex;flex-direction:column;gap:8px;z-index:2100}.noise-item{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:8px;font-size:12px;cursor:pointer;color:#64748b}.noise-item.active{background:#f3e8ff;color:#7c3aed;font-weight:700}