*{margin:0;padding:0;box-sizing:border-box;}
body{
    font-family:'Palatino Linotype','Book Antiqua',Palatino,serif;
    background:linear-gradient(135deg,#0c0c0c 0%,#1a1a2e 50%,#16213e 100%);
    overflow-x: hidden;
    overflow-y: auto;
    position:relative;
    min-height:100vh;
}

/* 粒子容器 - 固定背景 */
#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1;
}

/* 内容容器 */
.container{
    position: relative;
    z-index: 2;
    margin: 20px auto;
    padding: 30px;
    max-width: 900px;
    width: calc(100% - 2 * (26vw + 1vw));
    min-width: 300px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
    border: 1px solid #e8e8e8;
}

/* 答题区域样式 */
.container::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;pointer-events:none;z-index:-1;}
.question{font-size:1.3rem;font-weight:600;margin:20px 0;line-height:1.6;background:#faf8f5;padding:20px;border-radius:8px;border-left:4px solid #5d4037;min-height:60px;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;cursor:default;}
.options{margin-bottom:20px;max-height:400px;overflow-y:auto;}
.options button{display:block;width:100%;text-align:left;padding:14px 16px;margin:8px 0;border-radius:6px;border:1px solid #d4c9b8;background:#fff;color:#5d4037;font-size:15px;cursor:pointer;transition:all 0.3s;font-family:inherit;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;}
.options button:hover{background:#f5f2ef;border-color:#8b7355;transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,0.1);}

/* 数学输入和按钮 */
.math-input-container{display:flex;flex-direction:column;align-items:center;gap:20px;margin:25px 0;min-height:80px;}
#answerInput{padding:14px;width:200px;border-radius:6px;border:2px solid #d4c9b8;font-size:16px;background:#faf8f5;transition:all 0.3s;font-family:inherit;text-align:center;-webkit-user-select:text;-moz-user-select:text;-ms-user-select:text;user-select:text;}
#answerInput:focus{outline:none;border-color:#8b7355;background:#fff;box-shadow:0 4px 12px rgba(139,115,85,0.2);}
.controls{display:flex;gap:10px;justify-content:center;margin-top:20px;}
button.small{padding:10px 18px;background:#8b7355;border:none;color:#fff;border-radius:6px;cursor:pointer;font-weight:600;transition:all 0.3s;font-family:inherit;}
button.small:hover{background:#6d5c45;transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,0.2);}

/* 统计和进度条 */
#statsSection{position:absolute;right:20px;bottom:20px;text-align:right;}
.stats{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;margin-bottom:20px;font-size:14px;}
.stat{min-width:110px;background:#f5f2ef;padding:12px;border-radius:6px;text-align:center;border:1px solid #e0d6cc;transition:all 0.3s;}
.stat:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,0.1);}
.progress-bar,.cooldown-bar{height:40px;border-radius:8px;background:#f0f0f0;position:relative;overflow:hidden;margin:15px 0;border:1px solid #e0e0e0;}
.progress-fill,.cooldown-fill{height:100%;width:0;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;transition:width 0.3s ease;}
.progress-fill{background:linear-gradient(90deg,#4caf50,#66bb6a);box-shadow:0 2px 8px rgba(76,175,80,0.3);}
.cooldown-fill{background:linear-gradient(90deg,#f44336,#ef5350);box-shadow:0 2px 8px rgba(244,67,54,0.3);}

/* 消息和规则 */
#message{height:28px;text-align:center;margin:15px 0;font-weight:600;padding:8px;border-radius:4px;font-size:14px;background:#faf8f5;border:1px solid #e0d6cc;}
.rules{background:#faf8f5;padding:15px;border-radius:8px;margin-bottom:20px;font-size:14px;border-left:4px solid #8b7355;font-style:italic;line-height:1.6;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;cursor:default;}

/* 固定面板 */
#highestRecords{position:fixed;top:20px;right:20px;background:#fff;padding:20px;border-radius:8px;box-shadow:0 8px 25px rgba(0,0,0,0.15);font-size:14px;width:180px;z-index:1000;border:1px solid #e8e8e8;}
#userContainer{position:fixed;top:20px;left:20px;z-index:1000;background:#fff;padding:15px;border-radius:8px;box-shadow:0 8px 25px rgba(0,0,0,0.15);border:1px solid #e8e8e8;}

/* 公式图片 */
.formula-img{position:fixed;top:50%;transform:translateY(-50%);height:70vh;width:auto;max-width:25vw;z-index:1;transition:opacity 0.5s;opacity:0;object-fit:contain;filter:drop-shadow(0 4px 8px rgba(0,0,0,0.3));}
#leftFormula{left:1vw;transform-origin:left center;}
#rightFormula{right:1vw;transform-origin:right center;}

/* 测试按钮 */
.test-buttons{position:absolute;left:50%;bottom:-80px;transform:translateX(-50%);display:flex;flex-direction:column;gap:5px;z-index:100;}
.test-buttons .small{font-size:9px;padding:4px 8px;white-space:nowrap;background:linear-gradient(135deg,#a0a0a0,#808080);border:1px solid #606060;color:#fff;border-radius:3px;cursor:pointer;font-weight:500;transition:all 0.2s;font-family:inherit;min-width:135px;margin:0;line-height:1.1;text-shadow:0 1px 1px rgba(0,0,0,0.3);}
.test-buttons .small:hover{background:linear-gradient(135deg,#909090,#707070);transform:translateY(-1px);box-shadow:0 2px 4px rgba(0,0,0,0.2);}

/* 文本选择 */
.question::selection,.options button::selection{background:#ff4444 !important;color:white !important;}


/*--------------------------------------------------------------------------------------*/
/* 粒子控制面板样式 */
.particles-control-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(15px);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 1000;
    transform: translateY(calc(100% - 50px));
    transition: transform 0.3s ease;
    max-height: 80vh;
    overflow-y: auto;
}

.particles-control-panel.expanded {
    transform: translateY(0);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background: rgba(0, 0, 0, 0.8);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    cursor: pointer;
}

.panel-header h3 {
    margin: 0;
    color: #00ffff;
    font-size: 16px;
}

.toggle-btn {
    background: rgba(0, 255, 255, 0.2);
    border: 1px solid #00ffff;
    color: #00ffff;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.toggle-btn:hover {
    background: #00ffff;
    color: #000;
}

.panel-content {
    padding: 20px;
}

.control-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.control-section {
    background: rgba(255, 255, 255, 0.05);
    padding: 15px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.control-section h4 {
    margin: 0 0 15px 0;
    color: #00ffff;
    font-size: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 5px;
}

.control-group {
    margin-bottom: 15px;
}

.control-group label {
    display: block;
    margin-bottom: 5px;
    color: #ccc;
    font-size: 12px;
}

.slider {
    width: 100%;
    height: 4px;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.2);
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #00ffff;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

.color-picker {
    width: 100%;
    height: 30px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background: transparent;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.checkbox-group input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.mode-select {
    width: 100%;
    padding: 8px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    font-size: 12px;
}

.preset-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-bottom: 15px;
}

.preset-btn, .control-btn {
    padding: 8px 12px;
    border: 1px solid #666;
    border-radius: 4px;
    background: transparent;
    color: #ccc;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 11px;
    text-align: center;
}

.preset-btn:hover, .control-btn:hover {
    border-color: #00ffff;
    color: #00ffff;
    background: rgba(0, 255, 255, 0.1);
}

.control-btn {
    width: 100%;
    margin-bottom: 8px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .control-sections {
        grid-template-columns: 1fr;
    }
    
    .preset-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .panel-content {
        padding: 15px;
    }
}

/*-------------------------FPS------------------------*/
/* FPS显示样式 */
.fps-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    margin-bottom: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 12px;
    color: #00ffff;
}

.fps-display span:first-child {
    color: #ccc;
}

#fpsValue {
    font-weight: bold;
    color: #00ff00;
}

/* 良好FPS样式 */
.fps-good {
    color: #00ff00 !important;
}

/* 一般FPS样式 */
.fps-ok {
    color: #ffff00 !important;
}

/* 差FPS样式 */
.fps-poor {
    color: #ff4444 !important;
}

/*--------------------------------选项--------------------------------*/
/* 针对所有下拉菜单选项 */
.mode-select option {
    color: #000000 !important;
    background-color: #ffffff !important;
}

/* 下拉菜单本身 */
.mode-select {
    color: #000000 !important;
    background-color: #ffffff !important;
}

/* 鼠标悬停时的选项样式 */
.mode-select option:hover {
    background-color: #f0f0f0 !important;
}