* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-white: #FFFFFF;
    --color-light-gray: #F5F5F5;
    --color-medium-gray: #9E9E9E;
    --color-dark-gray: #424242;
    --color-anthracite: #2C2C2C;
    --color-black: #1A1A1A;
    --font-main: 'Montserrat', sans-serif;
}

body {
    font-family: var(--font-main);
    color: var(--color-anthracite);
    background-color: var(--color-white);
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    background-color: var(--color-white);
    padding: 40px 0 30px;
    text-align: center;
    border-bottom: 1px solid var(--color-light-gray);
}

.logo {
    max-width: 200px;
    height: auto;
    margin-bottom: 20px;
}

.tagline {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--color-dark-gray);
    margin-bottom: 15px;
}

.slogan {
    font-size: 24px;
    font-weight: 900;
    letter-spacing: 1px;
    color: var(--color-anthracite);
}

.main {
    padding: 40px 0;
}

.announcement {
    text-align: center;
    font-size: 18px;
    color: var(--color-dark-gray);
    margin-bottom: 50px;
    line-height: 1.8;
}

.section {
    margin-bottom: 60px;
}

.section-title {
    font-size: 28px;
    font-weight: 900;
    color: var(--color-anthracite);
    margin-bottom: 30px;
    text-align: center;
}

.about-content {
    background-color: var(--color-light-gray);
    padding: 30px;
    border-radius: 8px;
}

.about-image {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 8px;
    margin-bottom: 25px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.about-text {
    color: var(--color-dark-gray);
}

.about-text p {
    margin-bottom: 15px;
    font-size: 15px;
}

.about-text strong {
    color: var(--color-anthracite);
    font-weight: 600;
}

.expertise-grid {
    display: grid;
    gap: 25px;
}

.expertise-card {
    background-color: var(--color-light-gray);
    padding: 30px;
    border-radius: 8px;
    border-left: 4px solid var(--color-anthracite);
}

.expertise-title {
    font-size: 20px;
    font-weight: 900;
    color: var(--color-anthracite);
    margin-bottom: 15px;
}

.expertise-card p {
    color: var(--color-dark-gray);
    margin-bottom: 12px;
    font-size: 15px;
}

.expertise-services {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-medium-gray);
    font-style: italic;
}

.contact-section {
    background-color: var(--color-anthracite);
    padding: 40px 30px;
    border-radius: 8px;
    color: var(--color-white);
}

.contact-section .section-title {
    color: var(--color-white);
}

.contact-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-white);
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    transition: color 0.3s ease;
}

.contact-link:hover {
    color: var(--color-medium-gray);
}

.contact-icon {
    width: 24px;
    height: 24px;
}

.newsletter-section {
    background-color: var(--color-light-gray);
    padding: 40px 30px;
    border-radius: 8px;
}

.newsletter-wrapper {
    max-width: 540px;
    margin: 0 auto;
}

.newsletter-wrapper iframe {
    width: 100%;
    min-height: 305px;
}

.footer {
    background-color: var(--color-anthracite);
    color: var(--color-white);
    padding: 30px 0;
    text-align: center;
    font-size: 14px;
}

@media (min-width: 768px) {
    .logo {
        max-width: 250px;
    }

    .slogan {
        font-size: 32px;
    }

    .tagline {
        font-size: 16px;
    }

    .announcement {
        font-size: 20px;
    }

    .section-title {
        font-size: 36px;
    }

    .about-content {
        display: grid;
        grid-template-columns: 1fr 1.5fr;
        gap: 40px;
        align-items: start;
    }

    .about-image {
        margin: 0;
    }

    .expertise-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .contact-info {
        flex-direction: row;
        justify-content: center;
        gap: 50px;
    }
}

@media (min-width: 1024px) {
    .header {
        padding: 60px 0 40px;
    }

    .main {
        padding: 60px 0;
    }

    .section {
        margin-bottom: 80px;
    }
}