@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes mindmap-spin{0%{transform:rotate(0deg)}to{transform:rotate(360deg)}}.settings-btn{position:fixed;top:20px;right:20px;width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.2);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.3);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:100;transition:all .3s cubic-bezier(.4,0,.2,1);color:var(--text-color);opacity:.7}.settings-btn:hover{transform:rotate(30deg);background:rgba(255,255,255,.3);opacity:1}.settings-btn svg{width:24px;height:24px;opacity:.9}.settings-btn,.settings-modal,.settings-modal-container{font-family:'Douyin Sans Bold',-apple-system,BlinkMacSystemFont,'Segoe UI','Roboto','Oxygen','Ubuntu','Cantarell','Fira Sans','Droid Sans','Helvetica Neue',sans-serif;font-weight:700}.settings-modal-container{position:fixed;top:0;left:0;height:100%;background:rgba(0,0,0,.5);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:1000;opacity:0;width:100%;transition:opacity .3s cubic-bezier(.4,0,.2,1)}.settings-modal-container.visible{opacity:1}.settings-modal{width:90%;max-width:500px;background:rgba(255,255,255,.95);border-radius:16px;box-shadow:0 10px 30px rgba(0,0,0,.2);overflow:hidden;transform:translateY(20px) scale(.95);transition:transform .3s cubic-bezier(.4,0,.2,1)}.settings-modal-container.visible .settings-modal{transform:translateY(0) scale(1)}.settings-header{padding:20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(0,0,0,.1)}.settings-header h2{margin:0;font-size:20px;color:#333;font-family:'Douyin Sans Bold',-apple-system,BlinkMacSystemFont,'Segoe UI','Roboto','Oxygen','Ubuntu','Cantarell','Fira Sans','Droid Sans','Helvetica Neue',sans-serif;font-weight:700}.close-settings-btn{width:36px;height:36px;border-radius:50%;background:rgba(0,0,0,.05);border:0;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s ease;color:#666}.close-settings-btn:hover{background:rgba(0,0,0,.1);transform:rotate(90deg)}.settings-content{padding:20px}.settings-section{margin-bottom:24px}.setting-item,.settings-section h3{font-family:'Douyin Sans Bold',-apple-system,BlinkMacSystemFont,'Segoe UI','Roboto','Oxygen','Ubuntu','Cantarell','Fira Sans','Droid Sans','Helvetica Neue',sans-serif;font-weight:700}.settings-section h3{margin:0 0 16px;font-size:16px;color:#666}.setting-item{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid rgba(0,0,0,.05)}.setting-item:last-child{border-bottom:none}.setting-item span{font-size:15px;color:#333}.settings-footer{padding:16px 20px;background:rgba(0,0,0,.02);text-align:center}.settings-footer p{margin:0;font-size:13px;color:#999;font-family:'Douyin Sans Bold',-apple-system,BlinkMacSystemFont,'Segoe UI','Roboto','Oxygen','Ubuntu','Cantarell','Fira Sans','Droid Sans','Helvetica Neue',sans-serif;font-weight:700}.toggle-switch{position:relative;display:inline-block;width:60px;height:30px}.toggle-switch input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background-color:#ccc;transition:.4s;border-radius:30px;overflow:hidden;box-sizing:border-box;border:1px solid #eee;box-shadow:0 2px 8px rgba(0,0,0,.08)}.toggle-slider:before{position:absolute;content:"";height:22px;width:22px;left:4px;bottom:4px;background-color:#fff;transition:.4s;border-radius:50%;box-shadow:0 1px 3px rgba(0,0,0,.1)}.toggle-switch input:checked+.toggle-slider{background-color:#4f8cff}.toggle-switch input:checked+.toggle-slider:before{transform:translateX(30px);background-color:#fff}.toggle-slider:active:before{width:26px}.dark-mode .toggle-slider{background-color:#555;border:1px solid #333}.dark-mode .toggle-switch input:checked+.toggle-slider{background-color:#2196f3}.dark-mode .toggle-slider:before{background-color:#222}.toggle-switch input:focus+.toggle-slider{box-shadow:0 0 2px #4f8cff;outline:0}.toggle-slider:after{content:"";display:none}input:checked+.toggle-slider{background-color:#2c3e50}input:checked+.toggle-slider:before{transform:translateX(30px);background-color:#f1c40f}.toggle-slider:hover:before{box-shadow:0 0 8px rgba(0,0,0,.3)}input:checked+.toggle-slider:hover:before{box-shadow:0 0 8px rgba(241,196,15,.5)}:root{--dark-bg-color: #121212;--dark-text-color: rgba(255, 255, 255, 0.95);--dark-secondary-text: rgba(255, 255, 255, 0.7);--dark-border-color: rgba(255, 255, 255, 0.1);--dark-card-bg: rgba(255, 255, 255, 0.1);--dark-input-bg: rgba(255, 255, 255, 0.1);--dark-input-text: rgba(255, 255, 255, 0.9);--dark-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);--dark-hover-bg: rgba(255, 255, 255, 0.15)}.dark-mode .settings-btn{background:rgba(0,0,0,.4);border-color:rgba(255,255,255,.1)}.dark-mode .settings-btn:hover{background:rgba(0,0,0,.6)}.dark-mode .settings-modal{background:rgba(30,30,30,.95);box-shadow:0 10px 30px rgba(0,0,0,.4)}.dark-mode .settings-header{border-bottom-color:rgba(255,255,255,.1)}.dark-mode .setting-item span,.dark-mode .settings-header h2{color:var(--dark-text-color)}.dark-mode .close-settings-btn{background:rgba(255,255,255,.1)}.dark-mode .close-settings-btn:hover{background:rgba(255,255,255,.2)}.dark-mode .close-settings-btn,.dark-mode .settings-footer p,.dark-mode .settings-section h3{color:var(--dark-secondary-text)}.dark-mode .setting-item{border-bottom-color:rgba(255,255,255,.05)}.dark-mode .settings-footer{background:rgba(0,0,0,.2)}.dark-mode body{background:var(--dark-bg-color)}.dark-mode .time,.dark-mode body{color:var(--dark-text-color)}.dark-mode .date,.dark-mode .time{text-shadow:0 4px 15px rgba(0,0,0,.5)}.dark-mode .quote-card{color:var(--dark-text-color)}.dark-mode .quote-card:hover{background:rgba(40,40,40,.7);border-color:rgba(255,255,255,.2)}.dark-mode .quote-card,.dark-mode .search-container{background:rgba(30,30,30,.6);border-color:rgba(255,255,255,.1)}.dark-mode .search-btn:hover,.dark-mode .search-container.active{background:rgba(40,40,40,.7)}.dark-mode .search-input{color:var(--dark-input-text)}.dark-mode .search-input::placeholder{color:rgba(255,255,255,.5)}.dark-mode .search-btn{background:rgba(30,30,30,.6);color:var(--dark-text-color)}.dark-mode .search-engine-selector{background:rgba(30,30,30,.6);border-color:rgba(255,255,255,.1)}.dark-mode .search-engine-dropdown{background:rgba(30,30,30,.9);border-color:rgba(255,255,255,.1)}.dark-mode .search-engine-option{color:var(--dark-text-color)}.dark-mode .search-engine-option:hover{background:rgba(255,255,255,.1)}.dark-mode .search-engine-option .shortcut{color:rgba(255,255,255,.6);background:rgba(255,255,255,.1)}.dark-mode .results-container{background:#1a1a1a}.dark-mode .browser-header{background:rgba(30,30,30,.95);border-bottom-color:rgba(255,255,255,.1)}.dark-mode .results-search-input{background:rgba(30,30,30,.8);border-color:rgba(255,255,255,.1);color:var(--dark-text-color)}.dark-mode .results-search-btn{background:#1a73e8}.dark-mode .search-results-container{background:#1a1a1a}.dark-mode .ai-results-column,.dark-mode .web-results-column{background:#2a2a2a;border-color:rgba(255,255,255,.1);box-shadow:0 2px 8px rgba(0,0,0,.2)}.dark-mode .ai-chat h2,.dark-mode .ai-results-column h2,.dark-mode .web-results-column h2,.mind-map h3{color:var(--dark-text-color);border-bottom-color:rgba(255,255,255,.1)}.dark-mode .ai-message{color:var(--dark-text-color)}.dark-mode .ai-message,.dark-mode .search-result{background:#333;border-color:rgba(255,255,255,.1)}.dark-mode .search-result h3 a{color:#60a5fa}.dark-mode .search-result .result-url{color:#4ade80}.dark-mode .control-btn,.dark-mode .search-result .result-meta,.dark-mode .search-result .result-snippet{color:var(--dark-secondary-text)}.dark-mode .control-btn{background:#333;border-color:rgba(255,255,255,.1)}.dark-mode .control-btn:hover{background:#444;border-color:rgba(255,255,255,.2)}.dark-mode ::-webkit-scrollbar-track{background:#2a2a2a}.dark-mode ::-webkit-scrollbar-thumb{background:#444}.dark-mode ::-webkit-scrollbar-thumb:hover{background:#555}.dark-mode .search-suggestions{background:0 0!important;display:none;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}.dark-mode .search-container.active .search-suggestions{display:flex}.dark-mode .search-suggestion-item{background:rgba(40,40,40,.7);border-color:rgba(255,255,255,.1);color:var(--dark-text-color);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}.dark-mode .search-suggestion-item:hover{background:rgba(60,60,60,.8)}.dark-mode .search-suggestion-item .suggestion-icon{color:var(--dark-text-color);opacity:.8;filter:brightness(1.5)}.dark-mode .search-suggestion-item:hover .suggestion-icon{opacity:1}.select-container{position:relative;min-width:200px}.select-container select{appearance:none;-webkit-appearance:none;width:100%;padding:8px 12px;border-radius:8px;border:1px solid var(--border-color);background-color:var(--card-bg-color);color:var(--text-color);font-size:14px;cursor:pointer;transition:all .3s ease}.dark-mode .select-container select:hover,.select-container select:hover{border-color:var(--primary-color)}.select-container select:focus{outline:0;border-color:var(--primary-color);box-shadow:0 0 0 2px rgba(var(--primary-color-rgb),.2)}.date,.select-arrow{color:var(--text-color)}.select-arrow{position:absolute;right:12px;top:50%;transform:translateY(-50%);pointer-events:none}.dark-mode .select-container select{background-color:var(--dark-card-bg-color);color:var(--dark-text-color);border-color:var(--dark-border-color)}.dark-mode .select-arrow{color:var(--dark-secondary-text)}.date{font-size:1rem;margin-top:5px;text-align:center;opacity:0;animation:fadeInUp .7s cubic-bezier(.4,0,.2,1) .1s both}.dark-mode .date{color:var(--dark-text-color)}.api-key-modal-container{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.5);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:9999}.api-key-modal-content{background:rgba(255,255,255,.95)!important;border-radius:16px!important;padding:30px!important;width:90%!important;max-width:400px!important;box-shadow:0 10px 30px rgba(0,0,0,.2)!important;text-align:center!important;animation:modalFadeIn .3s ease forwards!important}.api-key-modal-content h2,.dark-mode .api-key-modal-content h2{margin-top:0!important;font-size:20px!important;margin-bottom:20px!important}.api-key-modal-content h2{color:#333!important}.api-key-modal-content p{color:#666!important;margin-bottom:20px!important;font-size:14px!important}.api-key-modal-content input[type=password],.dark-mode .api-key-modal-content input[type=password]{width:100%!important;padding:12px!important;border-radius:8px!important;margin-bottom:20px!important;font-size:16px!important}.api-key-modal-content input[type=password]{border:1px solid rgba(0,0,0,.2)!important;background:#fff!important;color:#333!important}.api-key-modal-content #cancel-api-key,.api-key-modal-content #submit-api-key{padding:10px 20px!important;border:0!important;border-radius:8px!important;cursor:pointer!important;font-size:15px!important}.api-key-modal-content #cancel-api-key{background:#f1f1f1!important;color:#333!important}.api-key-modal-content #submit-api-key{background:#4285f4!important;color:#fff!important}.api-key-modal-content #api-key-error{color:#d32f2f!important;margin-top:15px!important;font-size:14px!important;display:none!important}.dark-mode .api-key-modal-container{background:rgba(0,0,0,.7)}.dark-mode .api-key-modal-content{background:rgba(30,30,30,.95)!important;box-shadow:0 10px 30px rgba(0,0,0,.4)!important;color:var(--dark-text-color)!important}.dark-mode .api-key-modal-content h2{color:var(--dark-text-color)!important}.dark-mode .api-key-modal-content p{color:var(--dark-secondary-text)!important;margin-bottom:20px!important;font-size:14px!important}.dark-mode .api-key-modal-content input[type=password]{border-color:rgba(255,255,255,.2)!important}.dark-mode .api-key-modal-content #cancel-api-key,.dark-mode .api-key-modal-content #submit-api-key{padding:10px 20px!important;border:0!important;border-radius:8px!important;cursor:pointer!important;font-size:15px!important}.dark-mode .api-key-modal-content #cancel-api-key,.dark-mode .api-key-modal-content input[type=password]{background:rgba(50,50,50,.9)!important;color:var(--dark-text-color)!important}.dark-mode .api-key-modal-content #submit-api-key{background:#1a73e8!important;color:#fff!important}.dark-mode .api-key-modal-content #api-key-error{color:#ff6b6b!important;margin-top:15px!important;font-size:14px!important}.mind-map{border-color:rgba(255,255,255,.1)}.mind-map,.mind-map-content,.mind-map.loading{background:#2a2a2a}.mind-map-image{filter:brightness(.9) contrast(1.1)}.mind-map.loading .loading-text{color:var(--dark-secondary-text)}.mind-map.loading{background:linear-gradient(135deg,#e0e7ef 0%,#f8fafc 100%);border-radius:18px;box-shadow:0 4px 24px rgba(80,120,200,.1),0 1.5px 4px rgba(80,120,200,.07);padding:36px 0 24px;display:flex;flex-direction:column;align-items:center;min-height:220px;margin:32px 0 24px;border:1.5px solid #e4eaf2;transition:background .4s,box-shadow .4s}.loading-container,.mind-map.loading .loading-container{display:flex;flex-direction:column;align-items:center;gap:18px}.mind-map.loading .loading-spinner{width:48px;height:48px;border:6px solid #bcd0ee;border-top:6px solid #5b8ff9;border-radius:50%;animation:mindmap-spin 1.2s linear infinite;margin-bottom:10px;background:0 0}.mind-map.loading .loading-title{color:#3b4b6b;font-size:1.2rem;font-weight:700;letter-spacing:1px;margin-bottom:8px}.mind-map.loading .loading-text{color:#6c7a89;font-size:1rem;margin-bottom:0}.mind-map.loading .loading-dots{color:#5b8ff9;font-size:1.4rem;font-family:monospace;margin-top:0}.dark-mode .mind-map.loading{background:linear-gradient(135deg,#23272f 0%,#2d3440 100%);border:1.5px solid #2d3440;box-shadow:0 4px 24px rgba(30,40,60,.18),0 1.5px 4px rgba(30,40,60,.13)}.dark-mode .mind-map.loading .loading-spinner{border:6px solid #374151;border-top:6px solid #60a5fa}.dark-mode .mind-map.loading .loading-title{color:#e6eaf3}.dark-mode .mind-map.loading .loading-text{color:#b8c1d6}.dark-mode .mind-map.loading .loading-dots{color:#60a5fa}.loading-container{gap:12px;padding:32px;text-align:center;color:#60a5fa}.loading-spinner{width:40px;height:40px;border:3px solid #e5e7eb;border-top:3px solid #60a5fa;border-radius:50%;animation:spin 1s linear infinite}.loading-text{color:#333}.loading-title{font-size:15px;font-weight:500;margin-bottom:4px;color:#333}.loading-dots{font-size:24px;line-height:1;height:24px;color:#60a5fa;font-family:monospace}.ai-thinking-card{background:rgba(255,255,255,.9);border-radius:12px;padding:20px;margin:20px 0;box-shadow:0 4px 15px rgba(0,0,0,.1);display:flex;flex-direction:column;align-items:center;gap:12px;transition:all .3s ease}.ai-thinking-card .loading-spinner{margin-bottom:5px}.ai-thinking-card .loading-title{font-size:16px;font-weight:600}.ai-thinking-card .loading-dots{margin-top:-5px}.dark-mode .loading-container{background:rgba(30,30,30,.3)}.dark-mode .loading-spinner{border-color:#60a5fa #444 #444}.dark-mode .loading-text{color:var(--dark-secondary-text)}.dark-mode .ai-thinking-card .loading-title,.dark-mode .loading-title{color:var(--dark-text-color)}.dark-mode .loading-dots{color:#60a5fa}.dark-mode .ai-thinking-card{background:rgba(40,40,40,.9);box-shadow:0 4px 15px rgba(0,0,0,.3);border:1px solid rgba(255,255,255,.1)}@media (max-width:768px){.settings-btn{top:15px;right:15px;width:36px;height:36px}.settings-btn svg{width:20px;height:20px}}