/* 全局样式重置和基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4A90E2;
    --secondary-color: #2C3E50;
    --text-color: #333333;
    --text-light: #666666;
    --bg-color: #FFFFFF;
    --bg-light: #F8F9FA;
    --border-color: #E0E0E0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(74, 144, 226, 0.2);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    overflow-x: hidden;
}

/* 网站标题 */
.site-header {
    background-color: var(--secondary-color);
    color: white;
    padding: 1rem 0;
    text-align: center;
    box-shadow: var(--shadow);
}

.site-title {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

/* Hero区域 */
.hero-section {
    padding: 4rem 2rem;
    background: linear-gradient(to bottom, var(--bg-light) 0%, var(--bg-color) 100%);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-left {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hero-subtitle {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    line-height: 1.2;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow);
    text-align: center;
    width: fit-content;
    cursor: pointer;
}

.cta-button:hover {
    background: #357ABD;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.cta-button-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.cta-button-secondary:hover {
    background: var(--primary-color);
    color: white;
}

.cta-button:active {
    transform: translateY(0);
}

.hero-right {
    position: relative;
}

.hero-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.hero-image:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-hover);
}

/* 介绍区域 */
.intro-section {
    padding: 4rem 2rem;
    background-color: var(--bg-color);
}

.intro-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 3rem;
    align-items: start;
}

.intro-left {
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.intro-icon {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.intro-icon:hover {
    transform: rotate(5deg) scale(1.05);
    box-shadow: var(--shadow-hover);
}

.intro-right {
    padding-left: 1rem;
}

.intro-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.intro-content {
    font-size: 1rem;
    color: var(--text-color);
    line-height: 1.8;
}

.intro-content p {
    margin-bottom: 1rem;
}

.intro-features {
    margin: 1.5rem 0;
    padding-left: 2rem;
    list-style-type: disc;
}

.intro-features li {
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

/* 服务介绍区域 */
.services-section {
    padding: 4rem 2rem;
    background-color: var(--bg-light);
}

.services-title {
    max-width: 1200px;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    font-weight: 700;
    color: var(--secondary-color);
    padding-left: 1rem;
}

.services-intro {
    max-width: 1200px;
    margin: 0 auto 3rem;
    padding: 0 1rem;
    font-size: 1.05rem;
    color: var(--text-light);
    line-height: 1.8;
}

.services-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.service-card {
    background: var(--bg-color);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: left;
    border: 2px solid transparent;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
    text-align: center;
}

.service-name {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    text-align: center;
}

.service-description {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.7;
    text-align: left;
}

/* 页脚 */
.site-footer {
    background-color: var(--secondary-color);
    color: white;
    text-align: center;
    padding: 2rem;
    margin-top: 2rem;
}

.site-footer p {
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-left {
        text-align: center;
        align-items: center;
        order: 2;
    }

    .hero-right {
        order: 1;
    }

    .hero-subtitle {
        font-size: 2rem;
    }

    .intro-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .intro-left {
        justify-content: center;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .site-title {
        font-size: 2rem;
    }

    .hero-section,
    .intro-section,
    .services-section {
        padding: 2rem 1rem;
    }

    .hero-subtitle {
        font-size: 1.5rem;
    }

    .intro-title,
    .services-title {
        font-size: 1.5rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .service-card {
        padding: 1.5rem;
    }
}

/* 性能优化 - 减少重绘 */
.hero-image,
.intro-icon,
.service-card {
    will-change: transform;
}

/* 无障碍访问优化 */
.cta-button:focus,
.service-card:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* 打印样式 */
@media print {
    .site-header,
    .cta-button,
    .site-footer {
        display: none;
    }
}