:root {
    --primary-color: #1a73e8;
    --secondary-color: #4285f4;
    --accent-color: #34a853;
    --background-color: #f8f9fa;
    --text-color: #202124;
    --text-light: #5f6368;
    --border-color: #dadce0;
}

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

/* 导航栏样式 */
.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.logo h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    font-weight: 600;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

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

.auth-buttons button {
    padding: 0.5rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.login-btn {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.register-btn {
    background: var(--primary-color);
    color: white;
}

/* 主要内容区域 */
main {
    margin-top: 80px;
    padding: 2rem 5%;
}

/* Hero部分 */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
    margin-bottom: 4rem;
}

.hero-content {
    flex: 1;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.cta-button {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cta-button:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.2);
}

.hero-image {
    flex: 1;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 数据统计区域 */
.statistics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    padding: 3rem 0;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    margin-bottom: 4rem;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
}

.stat-item h3 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-item p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* 特性部分 */
.features {
    padding: 4rem 0;
}

.features h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

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

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.feature-card img {
    width: 80px;
    height: 80px;
    margin-bottom: 1.5rem;
}

.feature-card h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.feature-card p {
    color: var(--text-light);
}

/* 解决方案区域 */
.solutions {
    padding: 4rem 0;
    background: white;
    border-radius: 10px;
    margin-bottom: 4rem;
}

.solutions h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 0 2rem;
}

.solution-card {
    background: var(--background-color);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s ease;
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.solution-card img {
    width: 100px;
    height: 100px;
    margin-bottom: 1.5rem;
}

.solution-card h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.solution-card p {
    color: var(--text-light);
}

/* 合作伙伴区域 */
.partners {
    padding: 4rem 0;
}

.partners h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

.partner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    align-items: center;
}

.partner-logo {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.partner-logo:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.partner-logo img {
    max-width: 100%;
    height: auto;
    filter: grayscale(100%);
    transition: filter 0.3s ease;
}

.partner-logo:hover img {
    filter: grayscale(0%);
}

/* 新闻动态区域 */
.news {
    padding: 4rem 0;
    background: white;
    border-radius: 10px;
    margin-bottom: 4rem;
}

.news h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 0 2rem;
}

.news-card {
    background: var(--background-color);
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.news-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.news-content {
    padding: 1.5rem;
}

.news-date {
    color: var(--text-light);
    font-size: 0.9rem;
}

.news-content h4 {
    font-size: 1.2rem;
    margin: 0.5rem 0;
    color: var(--text-color);
}

.news-content p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* 联系我们区域 */
.contact {
    padding: 4rem 0;
}

.contact h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.contact-map {
    border-radius: 10px;
    overflow: hidden;
}

.contact-map img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 页脚样式 */
footer {
    background: #fff;
    padding: 4rem 5% 2rem;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h5 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.footer-section p {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-light);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-nav {
        flex-direction: column;
        padding: 1rem;
    }

    .nav-links {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
        margin: 1rem 0;
    }

    .hero {
        flex-direction: column;
        text-align: center;
    }

    .hero-content h2 {
        font-size: 2rem;
    }

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

    .contact-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .statistics {
        grid-template-columns: 1fr;
    }

    .solution-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
}

/* 轮播图样式 */
.carousel {
    margin-top: 60px;
    width: 100%;
    overflow: hidden;
    position: relative;
}

.carousel-container {
    position: relative;
    width: 100%;
}

.carousel-slides {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.carousel-slide {
    min-width: 100%;
    position: relative;
}

.carousel-slide img {
    width: 100%;
    height: 500px;
    object-fit: cover;
}

.slide-content {
    position: absolute;
    top: 50%;
    left: 10%;
    transform: translateY(-50%);
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.slide-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.slide-content p {
    font-size: 1.5rem;
}

.carousel-button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.3);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.5rem;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-button:hover {
    background: rgba(255, 255, 255, 0.5);
}

.carousel-button.prev {
    left: 20px;
}

.carousel-button.next {
    right: 20px;
}

.carousel-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    background: white;
    transform: scale(1.2);
}