/* ==================== 全局样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 颜色变量 */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #1c2128;
    --bg-hover: #21262d;
    
    --border-primary: #30363d;
    --border-secondary: #21262d;
    
    --text-primary: #e6edf3;
    --text-secondary: #c9d1d9;
    --text-tertiary: #7d8590;
    
    --accent-blue: #4493f8;
    --accent-green: #3fb950;
    --accent-yellow: #ffd700;
    --accent-orange: #f78166;
    --accent-red: #ff7b72;
    
    --success: #238636;
    --success-hover: #2ea043;
    --warning: #f78166;
    --error: #ff7b72;
    
    /* 间距 */
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 15px;
    --spacing-lg: 20px;
    --spacing-xl: 25px;
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.5);
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    padding: var(--spacing-lg);
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    animation: fadeIn var(--transition-slow);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 计算器头部 ==================== */
.calculator-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
}

.main-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.main-title i {
    color: var(--accent-blue);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.subtitle {
    color: var(--text-tertiary);
    font-size: 16px;
}

/* ==================== 计算器容器 ==================== */
.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

@media (max-width: 1024px) {
    .calculator-container {
        grid-template-columns: 1fr;
    }
}

.calculator-form,
.calculator-results {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.calculator-form:hover,
.calculator-results:hover {
    border-color: var(--border-primary);
    box-shadow: var(--shadow-md);
}

.section-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--accent-blue);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-primary);
}

.section-title i {
    color: var(--accent-orange);
}

/* ==================== 提示信息 ==================== */
.info-tip {
    background: linear-gradient(135deg, rgba(68, 147, 248, 0.1) 0%, rgba(68, 147, 248, 0.05) 100%);
    border-left: 3px solid var(--accent-blue);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 13px;
    color: var(--text-secondary);
    animation: slideInLeft var(--transition-normal);
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.info-tip i {
    color: var(--accent-blue);
    font-size: 14px;
}

/* ==================== 表单输入 ==================== */
.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 14px;
}

.label-hint {
    color: var(--text-tertiary);
    font-size: 12px;
    font-weight: 400;
    margin-left: var(--spacing-xs);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-field {
    width: 100%;
    padding: 12px 40px 12px 15px;
    background-color: var(--bg-primary);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 16px;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.input-field:focus {
    border-color: var(--accent-blue);
    outline: none;
    box-shadow: 0 0 0 3px rgba(68, 147, 248, 0.1);
}

.input-field:hover:not(:focus) {
    border-color: var(--text-tertiary);
}

.input-icon {
    position: absolute;
    right: 15px;
    color: var(--text-tertiary);
    pointer-events: none;
}

.error-message {
    display: block;
    color: var(--error);
    font-size: 12px;
    margin-top: var(--spacing-xs);
    min-height: 18px;
}

/* ==================== 星级选择 ==================== */
.star-rating {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.star {
    background: var(--bg-primary);
    border: 2px solid var(--border-primary);
    color: var(--text-tertiary);
    font-size: 24px;
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
}

.star:hover {
    border-color: var(--accent-yellow);
    color: var(--accent-yellow);
    transform: scale(1.1);
}

.star:focus {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

.star.active {
    color: var(--accent-yellow);
    border-color: var(--accent-yellow);
    background: rgba(255, 215, 0, 0.1);
}

.star-rating-label {
    margin-top: var(--spacing-sm);
    font-size: 14px;
    color: var(--text-tertiary);
}

.star-value {
    color: var(--accent-yellow);
    font-weight: 700;
    font-size: 16px;
}

/* ==================== 高级选项 ==================== */
.toggle-advanced {
    background: none;
    border: 1px solid var(--border-primary);
    color: var(--accent-blue);
    cursor: pointer;
    font-size: 14px;
    margin-top: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    width: 100%;
    justify-content: center;
    font-family: inherit;
}

.toggle-advanced:hover {
    background: var(--bg-hover);
    border-color: var(--accent-blue);
}

.toggle-advanced:focus {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

.toggle-advanced i {
    transition: transform var(--transition-normal);
}

.toggle-advanced.expanded i {
    transform: rotate(180deg);
}

.advanced-section {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.advanced-section.show {
    max-height: 800px;
}

.mixed-rating-section,
.negative-reviews-section {
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.subsection-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.subsection-title i {
    color: var(--accent-blue);
}

.subsection-hint {
    color: var(--text-tertiary);
    font-size: 13px;
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

.mixed-rating-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.mixed-star-label {
    min-width: 100px;
    color: var(--text-secondary);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.mixed-star-label i {
    color: var(--accent-yellow);
}

.slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--bg-primary);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent-blue);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
    background: var(--accent-blue);
    transform: scale(1.2);
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--accent-blue);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
}

.slider::-moz-range-thumb:hover {
    background: var(--accent-blue);
    transform: scale(1.2);
}

.percent-value {
    min-width: 50px;
    text-align: right;
    color: var(--text-primary);
    font-weight: 600;
}

.mixed-rating-result {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-secondary);
    margin-top: var(--spacing-md);
}

.mixed-rating-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.rating-display {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.rating-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent-yellow);
}

.rating-stars {
    color: var(--accent-yellow);
    font-size: 16px;
    display: flex;
    gap: 2px;
}

/* ==================== 计算按钮 ==================== */
.calculate-btn {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-hover) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: 14px var(--spacing-lg);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    margin-top: var(--spacing-lg);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    font-family: inherit;
}

.calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.calculate-btn:active {
    transform: translateY(0);
}

.calculate-btn:focus {
    outline: 3px solid rgba(35, 134, 54, 0.3);
    outline-offset: 2px;
}

/* ==================== 结果显示 ==================== */
.results-box {
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.result-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.result-item:hover {
    background: var(--bg-hover);
    transform: translateX(5px);
}

.result-item:last-child {
    margin-bottom: 0;
}

.result-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    color: var(--accent-blue);
    font-size: 18px;
}

.result-content {
    flex: 1;
}

.result-label {
    color: var(--text-tertiary);
    font-size: 13px;
    margin-bottom: var(--spacing-xs);
}

.result-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-green);
    line-height: 1;
}

.result-value.highlight {
    color: var(--accent-yellow);
    font-size: 28px;
}

.result-value.small {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
    line-height: 1.4;
}

/* ==================== 进度可视化 ==================== */
.progress-visualization {
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.progress-bar-container {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    height: 30px;
    overflow: hidden;
    margin: var(--spacing-md) 0;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue) 0%, var(--accent-green) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: width var(--transition-slow);
    min-width: 50px;
}

.progress-text {
    color: white;
    font-weight: 700;
    font-size: 12px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    color: var(--text-tertiary);
    font-size: 13px;
}

.progress-info strong {
    color: var(--text-primary);
}

/* ==================== 警告框 ==================== */
.warning-box {
    background: linear-gradient(135deg, rgba(247, 129, 102, 0.1) 0%, rgba(247, 129, 102, 0.05) 100%);
    border-left: 4px solid var(--warning);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-lg);
}

.warning-title {
    color: var(--warning);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 15px;
}

.warning-content {
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.6;
}

.warning-content p {
    margin-bottom: var(--spacing-sm);
}

.warning-content p:last-child {
    margin-bottom: 0;
}

.warning-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.warning-highlight {
    color: var(--warning) !important;
    font-weight: 600 !important;
}

/* ==================== 页脚 ==================== */
.footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-primary);
}

.footer-content {
    color: var(--text-tertiary);
    font-size: 13px;
}

.footer-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.footer-title i {
    color: var(--accent-blue);
}

.footer-text {
    margin-bottom: var(--spacing-xs);
}

.footer-credit {
    color: var(--text-tertiary);
}

/* ==================== 加载动画 ==================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(13, 17, 23, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    text-align: center;
    color: var(--accent-blue);
}

.loading-spinner i {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.loading-spinner p {
    font-size: 16px;
    color: var(--text-secondary);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    body {
        padding: var(--spacing-sm);
    }
    
    .main-title {
        font-size: 24px;
    }
    
    .subtitle {
        font-size: 14px;
    }
    
    .calculator-form,
    .calculator-results {
        padding: var(--spacing-md);
    }
    
    .section-title {
        font-size: 18px;
    }
    
    .star-rating {
        justify-content: space-between;
    }
    
    .star {
        font-size: 20px;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .mixed-rating-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .mixed-star-label {
        min-width: auto;
    }
    
    .slider {
        width: 100%;
    }
    
    .result-value {
        font-size: 20px;
    }
    
    .result-value.highlight {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .result-item {
        flex-direction: column;
        text-align: center;
    }
}

/* ==================== 打印样式 ==================== */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .toggle-advanced,
    .calculate-btn {
        display: none;
    }
    
    .calculator-container {
        grid-template-columns: 1fr;
    }
}