/* ========== Header ========== */
.header {
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    height: 98px;
}

.logo img {
    width: 244px;
    height: 93px;
}

.nav {
    flex: 1;
    margin-left: 99px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav a {
    font-size: 16px;
    color: #333;
    transition: color 0.2s;
}

.nav a:hover,
.nav a.active {
    color: #0d4a7c;
}

.nav .lang-switch {
    position: relative;
    flex-shrink: 0;
}

.nav .lang-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0;
    border: none;
    background: none;
    font-size: 16px;
    color: #333;
    cursor: pointer;
    white-space: nowrap;
    font-family: inherit;
}

.nav .lang-toggle:hover,
.lang-switch.open .lang-toggle {
    color: #0d4a7c;
}

.nav .lang-arrow {
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid currentColor;
    transition: transform 0.2s;
}

.lang-switch.open .lang-arrow {
    transform: rotate(180deg);
}

.nav .lang-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 100px;
    background: #fff;
    border: 1px solid #eee;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border-radius: 4px;
    overflow: hidden;
    z-index: 110;
}

.lang-switch.open .lang-dropdown {
    display: block;
}

.nav .lang-dropdown .lang-item {
    display: block;
    padding: 10px 16px;
    font-size: 14px;
    color: #333;
    white-space: nowrap;
    transition: background 0.2s, color 0.2s;
}

.nav .lang-dropdown .lang-item:hover {
    color: #0d4a7c;
    background: #f8fbff;
}

.nav .lang {
    font-size: 16px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 40px;
    height: 40px;
    padding: 0;
    border: none;
    background: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #333;
    transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

@media (max-width: 992px) {
    .header-inner {
        height: 72px;
    }

    .logo img {
        width: 180px;
        height: auto;
    }

    .nav {
        margin-left: 24px;
    }

    .nav a {
        font-size: 14px;
    }
}

@media (max-width: 768px) {
    .header-inner {
        justify-content: space-between;
        height: 60px;
    }

    .logo img {
        width: 140px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        flex: none;
        margin-left: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: #fff;
        padding: 12px 0;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.3s, opacity 0.3s, visibility 0.3s;
        z-index: 99;
    }

    .nav.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav a {
        padding: 14px 24px;
        font-size: 15px;
        border-bottom: 1px solid #f0f0f0;
    }

    .nav .lang-switch {
        padding: 14px 24px;
        border-bottom: 1px solid #f0f0f0;
    }

    .nav .lang-dropdown {
        position: static;
        display: none;
        margin-top: 8px;
        box-shadow: none;
        border: 1px solid #f0f0f0;
    }

    .lang-switch.open .lang-dropdown {
        display: block;
    }

    .nav a:last-child {
        border-bottom: none;
    }
}