:root {
    --primary-color: #FF6B35;
    --secondary-color: #004E89;
    --accent-color: #FFD166;
    --dark-color: #333;
    --light-color: #f8f9fa;
    --gray-color: #6c757d;
    --light-gray: #e9ecef;
    --white: #fff;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--white);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 主内容区样式 */
.main-container {
    /*max-width: 1300px;*/
    margin: 0 auto;
    width: 100%;
}

/* 英雄区域 */
.hero-banner {
    background: linear-gradient(135deg, var(--primary-color), #e05a2b);
    color: var(--white);
    padding: 100px 20px;
    text-align: center;
    position: relative;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 2.8rem;
    margin-bottom: 20px;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 30px;
    font-weight: 400;
    line-height: 1.6;
}

.highlight-text {
    color: var(--accent-color);
    font-weight: 600;
    letter-spacing: 3px;
    margin-bottom: 25px;
    display: inline-block;
}

/* 分数线趋势图 */
.trend-section {
    padding: 80px 0;
    background-color: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.4rem;
    color: var(--dark-color);
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}

.divider {
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    margin: 15px auto 0;
    border-radius: 2px;
}

.trend-card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    padding: 40px;
    text-align: center;
    margin-bottom: 40px;
}

.trend-title {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 30px;
}

.trend-years {
    display: inline-block;
    background: rgba(255,107,53,0.1);
    padding: 10px 30px;
    border-radius: 50px;
    margin-bottom: 30px;
    font-weight: 600;
}

.trend-image {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

    .trend-analysis {
        margin-top: 40px;
    }
    
    .analysis-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 15px;
        margin-top: 20px;
    }
    
    .analysis-item {
        background: rgba(255,107,53,0.05);
        padding: 15px;
        border-radius: 8px;
        border-left: 3px solid var(--primary-color);
    }
    
    .analysis-item h5 {
        color: var(--primary-color);
        margin-bottom: 8px;
        font-size: 1rem;
    }
    
    .analysis-item p {
        color: var(--dark-color);
        line-height: 1.5;
        font-size: 0.95rem;
    }
    
    @media (max-width: 768px) {
        .analysis-grid {
            grid-template-columns: 1fr;
        }
        .chart-container {
            height: 350px;
        }
    }


/* 估分排名系统 */
.ranking-section {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.ranking-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.feature-card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.feature-desc {
    color: var(--gray-color);
    line-height: 1.8;
}

/* 数据统计 */
.stats-section {
    padding: 80px 0;
    background-color: var(--white);
    text-align: center;
}

.stats-container {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    min-width: 150px;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 15px;
    line-height: 1;
}

.stat-label {
    font-size: 1.3rem;
    color: var(--dark-color);
    font-weight: 500;
}

/* 扫码区域 */
.scan-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color), #e05a2b);
    color: var(--white);
    text-align: center;
}

.scan-content {
    max-width: 800px;
    margin: 0 auto;
}

.scan-title {
    font-size: 2.2rem;
    margin-bottom: 30px;
}

.scan-subtitle {
    font-size: 1.5rem;
    margin-bottom: 30px;
}

.scan-button {
    display: inline-block;
    background: var(--accent-color);
    color: var(--dark-color);
    padding: 16px 40px;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: 30px;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.scan-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .ranking-features {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-title {
        font-size: 2.4rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .ranking-features {
        grid-template-columns: 1fr;
    }
    
    .stats-container {
        flex-direction: column;
        gap: 30px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .trend-card, .feature-card {
        padding: 30px 20px;
    }
}

/* 超小屏幕进一步优化 */
@media (max-width: 480px) {
    .cta-box {
        padding: 25px 10px; /* 进一步增加边距 */
    }
    
    .scan-title {
        font-size: 1.5rem;
        padding: 0 15px;
    }
    
    .scan-subtitle {
        font-size: 1.2rem;
        padding: 0 20px; /* 小屏幕边距更大 */
    }
}