/* 导航栏样式 - 所有页面复用 */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 25, 47, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.main-nav.scrolled {
    background: rgba(10, 25, 47, 0.98);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: #fff;
    font-weight: 700;
}

.logo-text {
    font-size: 1.5rem;
    letter-spacing: 2px;
    background: linear-gradient(135deg, #00d4ff, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-sub {
    font-size: 0.65rem;
    letter-spacing: 3px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 2px;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 8px;
}

.nav-menu a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.nav-menu a:hover {
    color: #00d4ff;
    background: rgba(0, 212, 255, 0.1);
}

.nav-menu a.active {
    color: #00d4ff;
    background: rgba(0, 212, 255, 0.15);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: #fff;
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(10, 25, 47, 0.98);
        padding: 20px;
        gap: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .nav-menu.active {
        max-height: 400px;
    }

    .nav-menu a {
        padding: 16px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
}