* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #fff;
    color: #333;
}
.container-custom {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.site-header {
    background: #fff;
    box-shadow: 0 2px 15px rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}
.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}
.logo-link img {
    max-height: 56px;
    max-width: 120px;
    width: auto;
    height: auto;
    display: block;
}
.nav-menu {
    display: flex;
    gap: 40px;
    list-style: none;
    margin: 0;
    padding: 0;
}
.nav-menu li a {
    color: #333;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s;
}
.nav-menu li a:hover,
.nav-menu li a.active {
    color: #2575fc;
}
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}
@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        gap: 0;
        padding: 20px;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        transform: translateY(-100%);
        opacity: 0;
        transition: all 0.3s;
    }
    .nav-menu.open {
        transform: translateY(0);
        opacity: 1;
    }
    .nav-menu li {
        padding: 15px 0;
        border-bottom: 1px solid #eee;
    }
    .nav-menu li:last-child {
        border-bottom: none;
    }
    .mobile-menu-btn {
        display: block;
    }
}