/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

:root {
    --primary-color: #9c27b0;
    --primary-dark: #7b1fa2;
    --secondary-color: #ff9800;
    --dark-bg: #121212;
    --dark-card: #1e1e1e;
    --light-text: #f5f5f5;
    --gray-text: #b0b0b0;
    --border-color: #333;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--dark-bg);
    color: var(--light-text);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-color);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
}

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 20px;
}

h1 {
    font-size: 3.2rem;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

h2 {
    font-size: 2.5rem;
    color: var(--light-text);
    position: relative;
    display: inline-block;
    margin-bottom: 40px;
}

h3 {
    font-size: 1.8rem;
    color: var(--secondary-color);
}

p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: var(--gray-text);
}

.btn {
    display: inline-block;
    background: linear-gradient(to right, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
    color: white;
}

.btn-secondary {
    background: linear-gradient(to right, var(--secondary-color), #ff5722);
}

.text-highlight {
    color: var(--secondary-color);
    font-weight: 600;
}

/* 顶部标题区域 */
header {
    background: linear-gradient(rgba(18, 18, 18, 0.9), rgba(18, 18, 18, 0.95)), url('https://images.unsplash.com/photo-1566073771259-6a8506099945?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80');
    background-size: cover;
    background-position: center;
    min-height: 100vh;
    display: flex;
    align-items: center;
    text-align: center;
    padding-top: 80px;
}

.header-content {
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.logo-icon {
    font-size: 3.5rem;
    color: var(--primary-color);
    margin-right: 15px;
}

.logo-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.logo-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--light-text);
    line-height: 1;
}

.logo-subtitle {
    font-size: 1.5rem;
    color: var(--secondary-color);
    font-weight: 300;
    letter-spacing: 3px;
}

.header-tagline {
    font-size: 1.3rem;
    margin-bottom: 40px;
    color: var(--gray-text);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.header-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* 关于我们区域 */
.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
    flex-wrap: wrap;
}

.about-text {
    flex: 1;
    min-width: 300px;
}

.about-image {
    flex: 1;
    min-width: 300px;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

.about-image:hover img {
    transform: scale(1.05);
}

/* 特点区域 */
.features {
    background-color: rgba(30, 30, 30, 0.7);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--dark-card);
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.feature-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 25px;
}

/* 关注原因区域 */
.reasons-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.reason-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.reason-number {
    background: var(--primary-color);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

/* 总结区域 */
.summary {
    background: linear-gradient(rgba(156, 39, 176, 0.1), rgba(30, 30, 30, 0.9)), url('https://images.unsplash.com/photo-1564501049418-3c27787d01e8?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80');
    background-size: cover;
    background-position: center;
    text-align: center;
}

.summary h2 {
    color: white;
}

.summary p {
    font-size: 1.2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: rgba(255, 255, 255, 0.9);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 40px;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: rgba(255, 255, 255, 0.1);
    padding: 15px 25px;
    border-radius: 50px;
    transition: var(--transition);
}

.contact-link:hover {
    background-color: var(--primary-color);
    transform: translateY(-5px);
}

.contact-icon {
    font-size: 1.5rem;
}

/* 页脚 */
footer {
    background-color: #0a0a0a;
    padding: 40px 0;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.copyright {
    color: var(--gray-text);
    font-size: 0.9rem;
}

.seo-keywords {
    margin-top: 20px;
    font-size: 0.9rem;
    color: #666;
}

/* 响应式设计 */
@media (max-width: 992px) {
    h1 {
        font-size: 2.8rem;
    }
    
    h2 {
        font-size: 2.2rem;
    }
    
    section {
        padding: 60px 0;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.3rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    h3 {
        font-size: 1.5rem;
    }
    
    .header-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
    
    .about-content, .features-grid, .reasons-content {
        flex-direction: column;
    }
    
    .logo-title {
        font-size: 2.5rem;
    }
    
    .logo-subtitle {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.8rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .contact-links {
        flex-direction: column;
        align-items: center;
    }
    
    .contact-link {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.8s ease forwards;
}

.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

.delay-3 {
    animation-delay: 0.6s;
}