/* ========== Header 样式 ========== */
.header {
    background: var(--bg-white);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-top {
    background: linear-gradient(135deg, #005BAC 0%, #003D7A 100%);
    color: var(--bg-white);
    padding: 10px 0;
    font-size: 13px;
}

.header-top a {
    color: var(--bg-white);
    margin-left: 20px;
    opacity: 0.9;
}

.header-top a:hover {
    opacity: 1;
}

.header-main {
    padding: 0;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.logo:hover {
    opacity: 0.85;
}

.logo img {
    height: 44px;
    width: auto;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 0.5px;
}

.header-contact i,
.header-links i {
    margin-right: 6px;
}

.header-search {
    position: relative;
    margin-left: 30px;
}

.header-search input {
    width: 200px;
    padding: 10px 40px 10px 18px;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: var(--bg-light);
}

.header-search input:focus {
    width: 240px;
    border-color: var(--primary-color);
    outline: none;
    background: var(--bg-white);
    box-shadow: 0 0 0 3px rgba(0, 91, 172, 0.1);
}

.header-search button {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 6px;
    transition: color 0.3s ease;
}

.header-search button:hover {
    color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.mobile-menu-toggle:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: -320px;
    width: 320px;
    height: 100vh;
    background: var(--bg-white);
    z-index: 999;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.15);
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    background: var(--primary-gradient);
    color: var(--bg-white);
}

.mobile-logo {
    font-size: 18px;
    font-weight: 700;
}

.mobile-menu-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.3s ease;
}

.mobile-menu-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.mobile-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-nav > li {
    border-bottom: 1px solid var(--border-color);
}

.mobile-nav > li > a {
    display: block;
    padding: 16px 20px;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.mobile-nav > li > a:hover {
    background: var(--bg-light);
    color: var(--primary-color);
    padding-left: 28px;
}

.mobile-dropdown .dropdown-menu {
    display: none;
    background: var(--bg-light);
    padding: 10px 0;
}

.mobile-dropdown .dropdown-menu li a {
    display: block;
    padding: 12px 20px 12px 40px;
    color: var(--text-secondary);
    font-size: 14px;
}

.mobile-dropdown .dropdown-menu li a:hover {
    background: var(--bg-white);
    color: var(--primary-color);
}

.mobile-dropdown .fa-angle-down {
    float: right;
    margin-top: 4px;
    transition: transform 0.3s ease;
}

.mobile-dropdown.open .fa-angle-down {
    transform: rotate(180deg);
}

@media (max-width: 992px) {
    .header-search {
        display: none;
    }

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

    .nav-menu {
        display: none;
    }
}