:root{
    --white: #ffffff;

    --navy-dark: #0D2B43;
    --navy: #123A5A;
    --blue-dark: #1F5F7A;
    --blue: #2F7FA3;
    --blue-soft: #6FA8C9;
    --blue-light: #B8D7E6;
    --blue-pale: #D8EEF7;
    --blue-bg: #EAF3F8;
    --ice-bg: #F7FCFF;

    --gray-dark: #1F2933;
    --gray: #5F7480;
    --gray-light: #7C8F99;

    /* Gradient chính */
    --grad-main: linear-gradient(90deg, #123A5A, #2F7FA3);
    --grad-main-hover: linear-gradient(90deg, #0D2B43, #23627E);

    /* Gradient background sáng */
    --grad-bg-soft: linear-gradient(180deg, #FFFFFF 0%, #F2F8FB 100%);
    --grad-bg-blue: linear-gradient(180deg, #F7FCFF 0%, #EAF3F8 100%);

    /* Gradient ánh kính / inox */
    --grad-glass: linear-gradient(135deg, #123A5A, #6FA8C9, #123A5A);
    --grad-glass-soft: linear-gradient(135deg, #D8EEF7, #6FA8C9, #123A5A);

    /* Gradient line / gạch trang trí */
    --grad-line: linear-gradient(90deg, rgba(111, 168, 201, 0.12) 0%, #6FA8C9 20%, #D8EEF7 50%, #2F7FA3 78%, rgba(111, 168, 201, 0.12) 100%);

    /* Gradient overlay khi hover ảnh */
    --grad-overlay: linear-gradient(to top, rgba(18, 58, 90, 0.88), rgba(18, 58, 90, 0.08));

    /* Gradient badge */
    --grad-badge: linear-gradient(135deg, #6FA8C9 0%, #123A5A 52%, #0D2B43 100%);
    --grad-badge-mobile: linear-gradient(135deg, #D8EEF7 0%, #6FA8C9 36%, #123A5A 72%, #D8EEF7 100%);
}

.gold-line {
    width: 3.65vw;
    height: 0.1vw;
    background: linear-gradient(90deg, #123A5A, #6FA8C9);
    margin-bottom: 1vw;
}

.gold-line-center {
    width: 3.65vw;
    height: 0.1vw;
    background: linear-gradient(90deg, #123A5A, #6FA8C9);
    margin: 1vw auto 3.1vw;
}

.gold-btn {
    display: inline-block;
    padding: 0.7vw 1.8vw;
    background: linear-gradient(90deg, #123A5A, #2F7FA3);
    color: #fff;
    text-decoration: none;
    letter-spacing: 0.05vw;
    font-size: 0.7vw;
    border-radius: 1.6vw;
    transition: all 0.3s ease;
}

.gold-btn:hover {
    transform: translateY(-0.2vw);
    box-shadow: 0 0.8vw 1.8vw rgba(198,167,94,0.3);
}

@media (max-width: 768px) {
    .gold-line {
        width: 18.7vw;
        height: 0.5vw;
        margin-bottom: 3vw;
    }
    
    .gold-line-center {
        width: 18.7vw;
        height: 0.5vw;
        margin: 0 auto 3vh;
    }

    .gold-btn {
        padding: 3vw 7vw;
        letter-spacing: 0.3vw;
        font-size: 3.7vw;
        border-radius: 5vw;
    }

    .gold-btn:hover { transform: translateY(-0.8vw); }
}