/* 导航栏样式 */
.navbar {
    /* background: var(--gradient-blue); */
    background-color: #ffffff;
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 0.6rem 5%;
    /* background: rgba(10, 30, 100, 0.95); */
    backdrop-filter: blur(10px);
    background-color: #16478a;
}

.navbar.scrolled:hover {
    background-color: #ffffff;
}

.logo {
    display: flex;
    align-items: center;
    color: #16478a;
    font-weight: 700;
    font-size: 1.8rem;
    transition: var(--transition);
}

.navbar.scrolled .logo {
    color: #ffffff;
}

.navbar.scrolled:hover .logo {
    color: #16478a;
}

.logo img {
    height: 50px;
    margin-right: 12px;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-img {
    position: relative;
}

.logo-img-top {
    opacity: 1;
}

.navbar.scrolled .logo-img-top {
    opacity: 0;
}

.navbar.scrolled:hover .logo-img-top {
    opacity: 1;
}

.logo-img-bottom {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    opacity: 0;
    transition: var(--transition);
}

.navbar.scrolled .logo-img-bottom {
    opacity: 1;
}

.navbar.scrolled:hover .logo-img-bottom {
    opacity: 0;
}

.logo-text span:first-child {
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-text span:last-child {
    font-size: 0.7rem;
    font-weight: 400;
    opacity: 0.9;
}

.logo i {
    margin-right: 10px;
    color: var(--accent-red);
}

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

.nav-links li {
    margin: 0 15px;
}

.nav-links a {
    color: #16478a;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 12px;
    border-radius: 4px;
    position: relative;
    transition: var(--transition);
}

.navbar.scrolled .nav-links a {
    color: #ffffff;
}

.navbar.scrolled:hover .nav-links a {
    color: #16478a;
}

.nav-links a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-red);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 70%;
}

.nav-buttons {
    display: flex;
    align-items: center;
}

.btn {
    padding: 10px 24px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    display: inline-block;
    text-align: center;
    border: none;
    outline: none;
}

.btn-login {
    background: transparent;
    border: 2px solid white;
    color: white;
    margin-right: 15px;
}

.btn-login:hover {
    background-color: white;
    color: var(--primary-blue);
    transform: translateY(-3px);
}

.btn-admin {
    background: var(--gradient-red);
    color: white;
    box-shadow: 0 5px 15px rgba(229, 62, 62, 0.3);
}

.btn-admin:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(229, 62, 62, 0.4);
}