/* 导航栏样式 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.header.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: 20px;
    font-weight: 600;
    background: linear-gradient(135deg, #00d4ff, #0099ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-menu a {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #00d4ff;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #00d4ff, #0099ff);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-cta {
    display: inline-block;
    background: linear-gradient(135deg, #00d4ff, #0099ff);
    color: #ffffff;
    border: none;
    border-radius: 20px;
    padding: 10px 25px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.3);
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 2px;
    background: #ffffff;
    transition: all 0.3s ease;
}

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

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(10px);
    padding: 30px 20px;
    overflow-y: auto;
}

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

.mobile-menu a {
    display: block;
    padding: 15px 0;
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.mobile-menu a:hover,
.mobile-menu a.active {
    color: #00d4ff;
}

.mobile-menu .nav-cta {
    display: block;
    text-align: center;
    margin-top: 30px;
    padding: 15px 30px;
    font-size: 16px;
}

/* 响应式 */
@media (max-width: 1200px) {
    .nav-menu {
        gap: 20px;
    }
    
    .nav-menu a {
        font-size: 14px;
    }
}

@media (max-width: 992px) {
    .nav-menu {
        display: none;
    }
    
    .nav-cta {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .header .container {
        height: 70px;
    }
}