@font-face{font-family:"bootstrap-icons";src:url("//cdn.jiexin.name/assets/vendor/bootstrap-icons/font/fonts/bootstrap-icons.woff2") format("woff2");font-display:block}:root{--primary:#007bff;--primary-dark:#0056b3;--success:#28a745;--danger:#dc3545}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif}.navbar{position:sticky;top:0;z-index:1030;box-shadow:0 2px 12px rgba(0,0,0,0.08)}.navbar-brand{font-weight:700;font-size:1.4rem}.hero{background:linear-gradient(135deg,#007bff 0%,#00d4ff 100%);color:#fff;padding:80px 0;text-align:center}.hero h1{font-size:2.8rem;font-weight:700;margin-bottom:1rem}.hero p{font-size:1.2rem;opacity:0.9;margin-bottom:2rem}.hero .btn{padding:12px 32px;font-size:1.1rem;border-radius:30px}.tool-card{transition:all 0.3s ease;border:none;box-shadow:0 2px 8px rgba(0,0,0,0.1);height:100%}.tool-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,0.15)}.tool-card .card-body{padding:1.5rem}.tool-card .card-title{font-weight:600;font-size:1.1rem;margin-bottom:0.5rem}.tool-card .card-text{color:#666;font-size:0.9rem}.tool-icon{width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#007bff 0%,#00d4ff 100%);color:#fff;border-radius:12px;font-size:1.5rem;margin-bottom:1rem}.category-section{padding:60px 0}.category-title{font-weight:700;margin-bottom:2rem;padding-bottom:0.5rem;border-bottom:3px solid #007bff;display:inline-block}.tool-area{background:#fff;border-radius:12px;padding:2rem;box-shadow:0 2px 12px rgba(0,0,0,0.1);margin:2rem 0}.upload-zone{border:2px dashed #dee2e6;border-radius:12px;padding:3rem;text-align:center;cursor:pointer;transition:all 0.3s;background:#f8f9fa}.upload-zone:hover,.upload-zone.dragover{border-color:#007bff;background:#e7f3ff}.upload-zone input[type="file"]{display:none}.upload-zone label{cursor:pointer;color:#666;margin:0}.upload-zone label strong{color:#333;display:block;margin-bottom:0.5rem}.format-option{display:flex;align-items:center;gap:0.5rem;padding:0.75rem 1rem;border:2px solid #dee2e6;border-radius:8px;cursor:pointer;transition:all 0.2s}.format-option:hover{border-color:#007bff}.format-option input:checked + span{color:#007bff;font-weight:600}.format-option:has(input:checked){border-color:#007bff;background:#e7f3ff}.file-list{margin-top:1rem}.file-item{display:flex;justify-content:space-between;align-items:center;padding:0.75rem 1rem;background:#f8f9fa;border-radius:8px;margin-bottom:0.5rem}.file-item .remove-btn{color:#dc3545;cursor:pointer;background:none;border:none;font-size:1.2rem;padding:0 0.5rem}.progress-custom{height:8px;border-radius:4px;margin-top:1rem;overflow:hidden;display:none}.progress-custom.active{display:block}.progress-bar-custom{height:100%;background:linear-gradient(90deg,#007bff,#00d4ff);border-radius:4px;transition:width 0.3s}.result-area{margin-top:2rem;padding:1.5rem;background:#d4edda;border-radius:8px;display:none}.result-area.show{display:block}.breadcrumb-nav{background:#f8f9fa;border-bottom:1px solid #e9ecef}.breadcrumb-nav .breadcrumb{background:transparent;padding:0.75rem 0;margin-bottom:0;border-radius:0}.breadcrumb-item a{color:#007bff;text-decoration:none}.site-footer{background:#343a40;color:#fff;padding:40px 0 20px;margin-top:60px}.site-footer h5{font-weight:600;margin-bottom:1.5rem}.site-footer a{color:rgba(255,255,255,0.7);text-decoration:none;transition:color 0.2s}.site-footer a:hover{color:#fff}.footer-links{list-style:none;padding:0;margin:0}.footer-links li{margin-bottom:0.5rem}.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:20px;margin-top:30px;text-align:center}.lang-switcher-footer{display:flex;gap:0.5rem;flex-wrap:wrap;justify-content:center}.lang-switcher-footer a{display:inline-block;padding:6px 12px;background:rgba(255,255,255,0.1);border-radius:4px;color:#fff;text-decoration:none;font-size:0.9rem;transition:all 0.2s}.lang-switcher-footer a:hover,.lang-switcher-footer a.active{background:#007bff}@media (max-width:768px){.hero h1{font-size:2rem}.hero{padding:40px 0}.tool-area{padding:1rem}.upload-zone{padding:2rem 1rem}}.feature-list{list-style:none;padding:0}.feature-list li{padding:0.5rem 0;padding-left:1.5rem;position:relative}.feature-list li::before{content:"\2713";position:absolute;left:0;color:#28a745;font-weight:bold}.game-area{background:#fff;border-radius:12px;padding:2rem;box-shadow:0 2px 12px rgba(0,0,0,0.1);margin:1.5rem 0}.game-info{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;flex-wrap:wrap;gap:0.5rem}.game-info .score{font-size:1.3rem;font-weight:700;color:#333}.game-controls{margin-top:1rem;display:flex;gap:0.5rem;flex-wrap:wrap}.game-controls .btn{min-width:80px}.game-canvas{display:block;margin:0 auto;border:2px solid #dee2e6;border-radius:8px;max-width:100%;touch-action:none}.game-2048-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;background:#bbada0;border-radius:8px;padding:8px;max-width:400px;margin:0 auto}.game-2048-grid .cell{aspect-ratio:1;background:rgba(238,228,218,0.35);border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;color:#776e65;transition:all 0.15s ease}.game-2048-grid .cell[data-value="2"]{background:#eee4da}.game-2048-grid .cell[data-value="4"]{background:#ede0c8}.game-2048-grid .cell[data-value="8"]{background:#f2b179;color:#f9f6f2}.game-2048-grid .cell[data-value="16"]{background:#f59563;color:#f9f6f2}.game-2048-grid .cell[data-value="32"]{background:#f67c5f;color:#f9f6f2}.game-2048-grid .cell[data-value="64"]{background:#f65e3b;color:#f9f6f2}.game-2048-grid .cell[data-value="128"]{background:#edcf72;color:#f9f6f2;font-size:1.2rem}.game-2048-grid .cell[data-value="256"]{background:#edcc61;color:#f9f6f2;font-size:1.2rem}.game-2048-grid .cell[data-value="512"]{background:#edc850;color:#f9f6f2;font-size:1.2rem}.game-2048-grid .cell[data-value="1024"]{background:#edc53f;color:#f9f6f2;font-size:1rem}.game-2048-grid .cell[data-value="2048"]{background:#edc22e;color:#f9f6f2;font-size:1rem}.game-2048-grid .cell[data-value="4096"]{background:#3c3a32;color:#f9f6f2;font-size:1rem}.game-2048-grid .cell[data-value="8192"]{background:#3c3a32;color:#f9f6f2;font-size:1rem}@media (max-width:480px){.game-2048-grid{gap:5px;padding:5px}.game-2048-grid .cell{font-size:1.1rem}}.game-match3-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:4px;max-width:400px;margin:0 auto;background:#333;padding:8px;border-radius:8px}.game-match3-grid .cell{aspect-ratio:1;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;cursor:pointer;transition:transform 0.15s;color:#fff;text-shadow:0 1px 2px rgba(0,0,0,0.5)}.game-match3-grid .cell:hover{transform:scale(1.1)}.game-match3-grid .cell.selected{outline:3px solid #fff;outline-offset:2px}.game-sudoku-grid{display:grid;grid-template-columns:repeat(9,1fr);gap:1px;background:#333;max-width:420px;margin:0 auto;border:2px solid #333;border-radius:4px}.game-sudoku-grid .cell{aspect-ratio:1;background:#fff;display:flex;align-items:center;justify-content:center;font-size:1.1rem;font-weight:700;cursor:pointer;user-select:none;transition:background 0.15s}.game-sudoku-grid .cell:hover{background:#e7f3ff}.game-sudoku-grid .cell.selected{background:#bbdefb}.game-sudoku-grid .cell.highlight{background:#e3f2fd}.game-sudoku-grid .cell.prefilled{color:#333}.game-sudoku-grid .cell.user-input{color:#007bff}.game-sudoku-grid .cell.error{color:#dc3545;background:#ffebee}.game-sudoku-grid .cell:nth-child(3n){border-right:2px solid #333}.game-sudoku-grid .cell:nth-child(9n){border-right:none}.game-sudoku-grid .cell:nth-child(n+19):nth-child(-n+27){border-bottom:2px solid #333}.game-sudoku-grid .cell:nth-child(n+46):nth-child(-n+54){border-bottom:2px solid #333}.game-sudoku-grid .cell:nth-child(9n+3){border-right:2px solid #333}.game-sudoku-grid .cell:nth-child(9n){border-right:none}.sudoku-number-buttons{display:flex;gap:6px;justify-content:center;margin-top:1rem;flex-wrap:wrap}.sudoku-number-buttons button{width:40px;height:40px;border:2px solid #dee2e6;border-radius:8px;background:#fff;font-size:1.1rem;font-weight:700;cursor:pointer;transition:all 0.2s}.sudoku-number-buttons button:hover{border-color:#007bff;background:#e7f3ff}@media (max-width:480px){.game-sudoku-grid .cell{font-size:0.9rem}.sudoku-number-buttons button{width:34px;height:34px;font-size:0.95rem}}.game-gomoku-canvas{display:block;margin:0 auto;cursor:pointer;border-radius:8px}.game-minesweeper-grid{display:grid;gap:2px;max-width:500px;margin:0 auto;background:#999;padding:4px;border-radius:4px}.game-minesweeper-grid .cell{aspect-ratio:1;background:#bbb;display:flex;align-items:center;justify-content:center;font-size:0.9rem;font-weight:700;cursor:pointer;user-select:none;border-radius:2px;transition:background 0.1s}.game-minesweeper-grid .cell:hover{background:#ccc}.game-minesweeper-grid .cell.revealed{background:#ddd;cursor:default}.game-minesweeper-grid .cell.flagged::after{content:"\2691";font-size:1rem}.game-minesweeper-grid .cell.mine{background:#dc3545;color:#fff}@media (max-width:520px){.game-minesweeper-grid .cell{font-size:0.7rem}}.game-tetris-canvas{display:block;margin:0 auto;border:2px solid #333;border-radius:4px;background:#111}.tetris-next{display:flex;flex-direction:column;align-items:center;gap:0.5rem}.tetris-next canvas{border:1px solid #dee2e6;border-radius:4px}.game-snake-canvas{display:block;margin:0 auto;border:2px solid #333;border-radius:4px;background:#1a1a2e}.spider-tableau{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;min-height:300px;padding:1rem;background:#1a6b3c;border-radius:8px}.spider-column{display:flex;flex-direction:column;gap:4px;min-width:60px}.spider-card{width:60px;height:84px;background:#fff;border:1px solid #ccc;border-radius:6px;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:0.8rem;font-weight:700;cursor:pointer;box-shadow:0 1px 3px rgba(0,0,0,0.2);transition:transform 0.1s;position:relative}.spider-card:hover{transform:translateY(-2px)}.spider-card.selected{box-shadow:0 0 0 2px #007bff}.spider-card.red{color:#dc3545}.spider-card.black{color:#333}.spider-card .suit-top{position:absolute;top:4px;left:6px;font-size:0.7rem}.spider-card .suit-center{font-size:1.5rem}.spider-card .suit-bottom{position:absolute;bottom:4px;right:6px;font-size:0.7rem;transform:rotate(180deg)}.spider-stock{display:flex;flex-direction:column;align-items:center;gap:0.5rem}.spider-stock-pile{width:60px;height:84px;background:#007bff;border:2px solid #0056b3;border-radius:6px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.5rem;cursor:pointer;transition:transform 0.2s}.spider-stock-pile:hover{transform:scale(1.05)}@media (max-width:768px){.spider-column{min-width:50px}.spider-card{width:50px;height:70px;font-size:0.7rem}.spider-card .suit-center{font-size:1.2rem}}