/* 基础样式 */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

:root {
    --primary-color: #ffffff;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --gradient-start: #16a085;
    --gradient-end: #2980b9;
    --text-light: #ffffff;
    --text-dark: #2c3e50;
    --text-medium: #34495e;
    --card-bg: rgba(255, 255, 255, 0.9);
    --card-border: rgba(52, 152, 219, 0.3);
    --bg-light: #f5f7fa;
    --shadow-color: rgba(44, 62, 80, 0.1);
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* 粒子背景 */
.particles-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

/* 头部样式 */
header {
    padding: 30px 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo {
    width: 80px;
    height: 80px;
    margin-right: 15px;
    filter: drop-shadow(0 0 10px rgba(52, 152, 219, 0.5));
}

.site-title {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(45deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(52, 152, 219, 0.2);
    letter-spacing: 1px;
}

/* 主区域样式 */
main {
    padding: 20px 0;
}

/* 英雄区域 */
.hero {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 80px;
    padding: 50px 0 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at center, rgba(52, 152, 219, 0.1) 0%, rgba(245, 247, 250, 0) 70%);
    z-index: -1;
    animation: pulse 15s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.3;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.5;
    }
    100% {
        transform: scale(1);
        opacity: 0.3;
    }
}

.hero-content {
    flex: 1;
    padding-right: 50px;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
    color: var(--text-dark);
    text-shadow: 0 0 15px rgba(52, 152, 219, 0.3);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-bottom: 30px;
    font-weight: 300;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    max-width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
    100% {
        transform: translateY(0px);
    }
}

/* 特性卡片 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 80px;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 15px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    box-shadow: 0 5px 15px var(--shadow-color);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px var(--shadow-color);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
    background: linear-gradient(45deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    font-weight: 600;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-medium);
    line-height: 1.7;
}

/* 关于区域 */
.about {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 80px;
    padding: 50px 0;
    position: relative;
}

.about::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, 
        rgba(52, 152, 219, 0) 0%, 
        rgba(52, 152, 219, 0.3) 50%, 
        rgba(52, 152, 219, 0) 100%);
}

.about-content {
    flex: 1;
    padding-right: 50px;
}

.about-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background: linear-gradient(45deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.about-content p {
    color: var(--text-medium);
    line-height: 1.8;
}

.about-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.about-image img {
    max-width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* 统计数据 */
.stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: 80px;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0 20px;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1.2rem;
    color: var(--text-medium);
}

/* 页脚 */
footer {
    padding: 30px 0;
    text-align: center;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, 
        rgba(52, 152, 219, 0) 0%, 
        rgba(52, 152, 219, 0.3) 50%, 
        rgba(52, 152, 219, 0) 100%);
}

.footer-content {
    color: var(--text-medium);
    font-size: 0.9rem;
}

.icp {
    margin-top: 10px;
    font-size: 0.8rem;
    color: var(--text-medium);
    text-decoration: none;
}

/* 淡入动画 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero, .about {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content, .about-content {
        padding-right: 0;
        margin-bottom: 40px;
    }
    
    .features {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .site-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .stat-item {
        margin-bottom: 30px;
    }
}

@media (max-width: 576px) {
    .logo {
        width: 60px;
        height: 60px;
    }
    
    .site-title {
        font-size: 1.8rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
}