* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4361ee;
    --secondary-color: #3a0ca3;
    --accent-color: #4cc9f0;
    --success-color: #4CAF50;
    --warning-color: #ff9e00;
    --danger-color: #f72585;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --gray-color: #6c757d;
    --background-color: #f0f8ff;
    --card-bg: #ffffff;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
    --border-radius: 12px;
    --transition-speed: 0.3s;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--background-color);
    font-family: 'Poppins', Arial, sans-serif;
    color: var(--dark-color);
    padding: 20px;
    background-image: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    gap: 1.5rem;
    height: 100vh;
    justify-content: center;
    padding: 1rem 0;
}

/* 标题样式 */
.header {
    text-align: center;
    margin-bottom: 1rem;
    width: 100%;
}

.clock-title {
    color: var(--secondary-color);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.subtitle {
    color: var(--gray-color);
    font-size: 1.1rem;
    font-weight: 400;
    margin-bottom: 1rem;
}

/* 主内容区布局 */
.main-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    width: 100%;
}

.clock-section {
    flex: 1;
    min-width: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.controls-section {
    flex: 1;
    min-width: 300px;
    max-width: 500px;
}

/* 卡片样式 */
.card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    padding: 1.5rem;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* 时钟容器样式 */
.clock-container {
    width: 400px;
    height: 400px;
    position: relative;
    margin-bottom: 1.5rem;
}

.clock {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: var(--card-bg);
    border: 10px solid var(--secondary-color);
    position: relative;
    box-shadow: var(--shadow-md),
                inset 0 0 20px rgba(0,0,0,0.1);
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: radial-gradient(circle, #ffffff, #f0f0f0);
}

/* 时钟中心点 */
.center-point {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    background-color: var(--accent-color);
    border: 2px solid var(--secondary-color);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    box-shadow: 0 0 5px rgba(0,0,0,0.3);
}

/* 时钟指针样式 */
.hand {
    position: absolute;
    top: 50%;
    left: 50%;
    transform-origin: center bottom;
    z-index: 5;
}

.hour-hand {
    width: 8px;
    height: 30%;
    background-color: var(--dark-color);
    border-radius: 6px;
    transform: translate(-50%, 0);
    margin-top: -30%;
}

.minute-hand {
    width: 6px;
    height: 40%;
    background-color: var(--secondary-color);
    border-radius: 4px;
    transform: translate(-50%, 0);
    margin-top: -40%;
}

.second-hand {
    width: 3px;
    height: 45%;
    background-color: var(--danger-color);
    border-radius: 2px;
    transform: translate(-50%, 0);
    margin-top: -45%;
}

/* 刻度线 */
.tick-marks {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.tick-marks::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: repeating-conic-gradient(
        from 0deg,
        transparent 0deg 6deg,
        rgba(0, 0, 0, 0.1) 6deg 6.5deg
    );
}

/* 数字样式 */
.number {
    position: absolute;
    width: 100%;
    height: 100%;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark-color);
}

.number span {
    position: absolute;
    transform: rotate(var(--rotate-back));
    display: block;
    width: 30px;
    height: 30px;
    line-height: 30px;
    text-align: center;
}

.number1 { --rotate-back: -30deg; transform: rotate(30deg); }
.number2 { --rotate-back: -60deg; transform: rotate(60deg); }
.number3 { --rotate-back: -90deg; transform: rotate(90deg); }
.number4 { --rotate-back: -120deg; transform: rotate(120deg); }
.number5 { --rotate-back: -150deg; transform: rotate(150deg); }
.number6 { --rotate-back: -180deg; transform: rotate(180deg); }
.number7 { --rotate-back: -210deg; transform: rotate(210deg); }
.number8 { --rotate-back: -240deg; transform: rotate(240deg); }
.number9 { --rotate-back: -270deg; transform: rotate(270deg); }
.number10 { --rotate-back: -300deg; transform: rotate(300deg); }
.number11 { --rotate-back: -330deg; transform: rotate(330deg); }
.number12 { --rotate-back: 0deg; transform: rotate(0deg); }

.number span {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%) rotate(var(--rotate-back));
}

/* 角度显示器 */
.angle-display {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--shadow-sm);
    margin-top: 1rem;
    text-align: center;
    min-width: 200px;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.display-tabs {
    display: flex;
    border-bottom: 1px solid var(--accent-color);
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    font-weight: 500;
    color: var(--gray-color);
    transition: all 0.3s;
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

.angle-value, .time-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--secondary-color);
    padding: 0.5rem 0;
}

.confirm-button {
    background-color: var(--success-color);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s;
}

.confirm-button:hover {
    background-color: #3d8b40;
    transform: translateY(-2px);
}

/* 控制面板样式 */
.controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
}

.section-title {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 0.5rem;
}

.subsection-title {
    font-size: 1.1rem;
    color: var(--dark-color);
    margin-bottom: 0.8rem;
    font-weight: 500;
}

/* 自定义输入样式 */
.custom-inputs {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
    background-color: rgba(240, 240, 240, 0.5);
    border-radius: var(--border-radius);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    color: var(--dark-color);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.input-with-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.input-group input {
    width: 80px;
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 6px;
    text-align: center;
    font-size: 1rem;
    transition: border-color var(--transition-speed);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.3);
}

.increment-btn, .decrement-btn {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: none;
    background-color: var(--light-color);
    color: var(--dark-color);
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color var(--transition-speed);
}

.increment-btn:hover, .decrement-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

/* 快捷角度按钮 */
.quick-angles {
    margin-top: 1rem;
}

.angle-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.angle-btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    background-color: var(--accent-color);
    color: white;
    cursor: pointer;
    transition: all var(--transition-speed);
    font-weight: 500;
}

.angle-btn:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* 旋转控制按钮 */
.direction-controls {
    margin-top: 1rem;
}

.control-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.control-btn {
    flex: 1;
    min-width: 150px;
    padding: 0.8rem 1.2rem;
    border: none;
    border-radius: 8px;
    background-color: var(--primary-color);
    color: white;
    cursor: pointer;
    transition: all var(--transition-speed);
    font-weight: 500;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.control-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 重置按钮 */
.reset-button {
    width: 100%;
    padding: 0.8rem 1.2rem;
    border: none;
    border-radius: 8px;
    background-color: var(--danger-color);
    color: white;
    cursor: pointer;
    transition: all var(--transition-speed);
    font-weight: 500;
    margin-top: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.reset-button:hover {
    background-color: #d10a6c;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 页脚样式 */
.footer {
    margin-top: 1rem;
    text-align: center;
    color: var(--gray-color);
    font-size: 0.9rem;
    width: 100%;
    padding: 0.5rem 0;
    border-top: 1px solid rgba(0,0,0,0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
        align-items: center;
    }
    
    .clock-container {
        width: 250px;
        height: 250px;
    }
    
    .controls-section {
        width: 100%;
    }
    
    .control-buttons {
        flex-direction: column;
    }
    
    .control-btn {
        width: 100%;
    }
    
    .clock-title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .clock-container {
        width: 220px;
        height: 220px;
    }
    
    .number {
        font-size: 1rem;
    }
    
    .angle-buttons {
        justify-content: center;
    }
    
    .input-group {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .input-with-controls {
        width: 100%;
        justify-content: center;
    }
}

@media (max-height: 800px) {
    .clock-container {
        width: 350px;
        height: 350px;
    }
    
    .container {
        padding: 0.5rem 0;
    }
    
    .header {
        margin-bottom: 0.5rem;
    }
    
    .clock-title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
}

@media (max-height: 700px) {
    .clock-container {
        width: 300px;
        height: 300px;
    }
}

/* 动画效果 */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.center-point {
    animation: pulse 2s infinite;
}

/* 学习提示卡片样式 */
/* 
.learning-tips {
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
    overflow: hidden;
    color: white;
    width: 100%;
    max-width: 500px;
}

.tips-header {
    padding: 1rem;
    font-size: 1.2rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tips-content {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 1rem;
}

.tips-content p {
    margin: 0.7rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tips-content i {
    color: #ffeb3b;
} 
*/