/* 碳足迹计算器页面样式 - 绿色主题 */

/* 页面标题 */
.page-header {
    text-align: center;
    padding: 3em 0;
    background: linear-gradient(135deg, rgba(67, 160, 71, 0.12) 0%, rgba(102, 187, 106, 0.12) 100%);
    border-radius: 20px;
    margin: 2em 0;
}

.page-header h1 {
    font-size: 3em;
    margin-bottom: 0.5em;
    background: linear-gradient(135deg, #43a047 0%, #66bb6a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.page-header p {
    font-size: 1.3em;
    color: #388e3c;
    max-width: 600px;
    margin: 0 auto;
}

/* 计算器介绍 */
.calculator-intro {
    padding: 3em 0;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 20px;
    margin: 2em 0;
    box-shadow: 0 15px 35px rgba(67,160,71,0.08);
}

.intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3em;
    align-items: center;
}

.intro-text h2 {
    font-size: 2.5em;
    margin-bottom: 1em;
    color: #2e7d32;
    position: relative;
}

.intro-text h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #43a047, #66bb6a);
    border-radius: 2px;
}

.intro-text p {
    font-size: 1.1em;
    line-height: 1.8;
    color: #388e3c;
    margin-bottom: 1.5em;
}

.intro-image img {
    width: 100%;
    max-width: 500px;
    border-radius: 15px;
    box-shadow: 0 15px 35px rgba(67,160,71,0.10);
    transition: transform 0.3s ease;
}

.intro-image img:hover {
    transform: scale(1.02);
}

/* 计算器表单 */
.calculator-section {
    padding: 3em 0;
}

.calculator-section h2 {
    text-align: center;
    font-size: 2.5em;
    margin-bottom: 2em;
    color: #2e7d32;
    position: relative;
}

.calculator-section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #43a047, #66bb6a);
    border-radius: 2px;
}

.carbon-calculator {
    max-width: 900px;
    margin: 0 auto;
}

.form-section {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 2.5em;
    margin-bottom: 2em;
    box-shadow: 0 10px 30px rgba(67,160,71,0.08);
    border: 1px solid #c8e6c9;
}

.form-section h3 {
    font-size: 1.5em;
    margin-bottom: 1.5em;
    color: #2e7d32;
    position: relative;
    padding-left: 1em;
}

.form-section h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 1.5em;
    background: linear-gradient(135deg, #43a047, #66bb6a);
    border-radius: 2px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5em;
}

/* 计算结果展示 */
.results-section {
    padding: 3em 0;
    background: linear-gradient(135deg, #43a047 0%, #66bb6a 100%);
    border-radius: 20px;
    margin: 3em 0;
    color: #fff;
}

.results-section h2 {
    text-align: center;
    font-size: 2.5em;
    margin-bottom: 2em;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.results-content {
    max-width: 1000px;
    margin: 0 auto;
}

.result-summary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2em;
    margin-bottom: 3em;
    align-items: center;
}

.carbon-score {
    text-align: center;
    background: rgba(255,255,255,0.13);
    border-radius: 20px;
    padding: 2em;
    backdrop-filter: blur(10px);
}

.carbon-score h3 {
    font-size: 1.5em;
    margin-bottom: 1em;
}

.score-display {
    font-size: 3em;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.score-display .unit {
    font-size: 0.5em;
    opacity: 0.8;
}

.carbon-level {
    text-align: center;
}

.carbon-level h4 {
    font-size: 1.3em;
    margin-bottom: 1em;
}

.level-badge {
    display: inline-block;
    padding: 0.5em 2em;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.2em;
    text-transform: uppercase;
}

.level-badge.低 {
    background: linear-gradient(135deg, #43a047, #a5d6a7);
}

.level-badge.中 {
    background: linear-gradient(135deg, #fbc02d, #a5d6a7);
}

.level-badge.高 {
    background: linear-gradient(135deg, #e53935, #a5d6a7);
}

/* 分类分布图表 */
.category-breakdown {
    background: rgba(255,255,255,0.13);
    border-radius: 20px;
    padding: 2em;
    margin-bottom: 3em;
    backdrop-filter: blur(10px);
}

.category-breakdown h3 {
    text-align: center;
    font-size: 1.8em;
    margin-bottom: 2em;
}

.breakdown-chart {
    display: grid;
    gap: 1.5em;
}

.chart-item {
    display: grid;
    grid-template-columns: 150px 1fr 100px;
    gap: 1em;
    align-items: center;
}

.chart-label {
    font-weight: 600;
    font-size: 1.1em;
}

.chart-bar {
    background: rgba(255,255,255,0.2);
    border-radius: 10px;
    height: 20px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #43a047, #a5d6a7);
    border-radius: 10px;
    transition: width 1s ease;
}

.chart-value {
    text-align: right;
    font-weight: 600;
}

/* 对比图表 */
.comparison-section {
    background: rgba(255,255,255,0.13);
    border-radius: 20px;
    padding: 2em;
    margin-bottom: 3em;
    backdrop-filter: blur(10px);
}

.comparison-section h3 {
    text-align: center;
    font-size: 1.8em;
    margin-bottom: 2em;
}

.comparison-chart {
    display: grid;
    gap: 1.5em;
}

.comparison-item {
    display: grid;
    grid-template-columns: 150px 1fr 100px;
    gap: 1em;
    align-items: center;
}

.comparison-bar {
    background: rgba(255,255,255,0.2);
    border-radius: 10px;
    height: 25px;
    overflow: hidden;
}

.comparison-bar.your-bar .bar-fill {
    background: linear-gradient(90deg, #388e3c, #a5d6a7);
}

.comparison-bar.average-bar .bar-fill {
    background: linear-gradient(90deg, #bdbdbd, #c8e6c9);
}

/* 建议区域 */
.recommendations {
    background: rgba(255,255,255,0.13);
    border-radius: 20px;
    padding: 2em;
    backdrop-filter: blur(10px);
}

.recommendations h3 {
    text-align: center;
    font-size: 1.8em;
    margin-bottom: 2em;
}

.recommendation-list div {
    background: rgba(255,255,255,0.1);
    border-radius: 15px;
    padding: 1.5em;
    margin-bottom: 1em;
    border-left: 4px solid #43a047;
}

/* 知识科普 */
.knowledge-section {
    padding: 3em 0;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 20px;
    margin: 3em 0;
    box-shadow: 0 15px 35px rgba(67,160,71,0.08);
}

.knowledge-section h2 {
    text-align: center;
    font-size: 2.5em;
    margin-bottom: 2em;
    color: #2e7d32;
    position: relative;
}

.knowledge-section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #43a047, #66bb6a);
    border-radius: 2px;
}

.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2em;
}

.knowledge-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 2.5em;
    box-shadow: 0 10px 30px rgba(67,160,71,0.08);
    transition: all 0.3s ease;
    border: 1px solid #c8e6c9;
}

.knowledge-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
}

.knowledge-card h3 {
    font-size: 1.5em;
    margin-bottom: 1em;
    color: #2e7d32;
}

.knowledge-card p {
    color: #7f8c8d;
    line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 900px) {
    .intro-content {
        grid-template-columns: 1fr;
        gap: 2em;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .result-summary {
        grid-template-columns: 1fr;
        gap: 1.5em;
    }

    .chart-item,
    .comparison-item {
        grid-template-columns: 120px 1fr 80px;
        gap: 0.8em;
    }

    .page-header h1,
    .calculator-section h2,
    .results-section h2,
    .knowledge-section h2 {
        font-size: 2em;
    }
}

@media (max-width: 600px) {
    .page-header {
        padding: 2em 0;
    }

    .page-header h1 {
        font-size: 1.8em;
    }

    .page-header p {
        font-size: 1.1em;
    }

    .form-section {
        padding: 1.5em;
    }

    .chart-item,
    .comparison-item {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .chart-label,
    .chart-value {
        text-align: center;
    }

    .score-display {
        font-size: 2.5em;
    }
}