/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
}

/* 导航栏样式 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.logo h1 {
    color: #2c3e50;
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(45deg, #3498db, #2ecc71);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: all 0.3s ease;
}
/* 新增：导航栏站点logo样式，与标题水平对齐 */
.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.site-logo {
    width: 56px;
    height: 56px;
    object-fit: contain;
}

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

.nav-links li {
    margin-left: 0;
}

.nav-links a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(45deg, #3498db, #2ecc71);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-links a:hover {
    color: #3498db;
    background: rgba(52, 152, 219, 0.1);
}

.nav-links a:hover::before {
    width: 80%;
}

.nav-links a.active {
    color: #3498db;
    background: rgba(52, 152, 219, 0.1);
}

.nav-links a.active::before {
    width: 80%;
}

/* 英雄区域样式 */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, #3498db, #2c3e50);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 1rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.hero-text {
    flex: 1;
    padding-right: 2rem;
}


.hero-text h2 {
    font-size: 3.5rem;
    color: white;
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease;
    line-height: 1.2;
}

.hero-text p {
    font-size: 1.4rem;
    color: white;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.3s backwards;
    line-height: 1.6;
}

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

.hero-image img {
    width: 400px;
    height: 400px;
    object-fit: cover;
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/ai-pattern.svg') center/cover;
    opacity: 0.1;
    animation: float 20s linear infinite;
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.cta-button {
    padding: 1rem 2rem;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.cta-button.primary {
    background: white;
    color: #3498db;
}

.cta-button.secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* 特性区域样式 */
.features {
    padding: 5rem 5%;
    background-color: #f9f9f9;
}

.features h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: #2c3e50;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

/* 页脚样式 */
footer {
    background-color: #2c3e50;
    color: white;
    padding: 3rem 5% 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-section h3 {
    margin-bottom: 1rem;
}

.social-links a {
    color: white;
    text-decoration: none;
    margin-right: 1rem;
}

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
        box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        margin: 0;
    }

    .nav-links a {
        display: block;
        padding: 1rem;
        text-align: center;
    }

    .hero-content {
        flex-direction: column;
        text-align: center;
        padding: 2rem;
    }
    
    .hero-text {
        padding-right: 0;
    }
    
    .hero-image img {
        width: 300px;
        height: 300px;
    }
    
    .hero-buttons {
        justify-content: center;
    }

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

    .mobile-menu-btn {
        display: block;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: #2c3e50;
    margin: 5px 0;
    transition: all 0.3s ease;
}