:root {
    background: #f5f7f8;
    color: #1f2933;
    font-family: Arial, "Microsoft YaHei", sans-serif;
    line-height: 1.6;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #f5f7f8;
}

a {
    color: inherit;
}

.home-page {
    width: 100%;
    max-width: 1080px;
    margin: 0 auto;
    padding: 24px 16px 56px;
}

.home-hero {
    min-height: 520px;
    padding: 96px 0 32px;
}

.home-hero__content {
    max-width: 780px;
}

.home-eyebrow {
    margin: 0 0 10px;
    color: #176b5d;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0;
}

.home-hero h1,
.home-section h2,
.test-card h3,
.feature-card h2,
.brand-note h2 {
    margin: 0;
    color: #172126;
    line-height: 1.22;
}

.home-hero h1 {
    max-width: 760px;
    font-size: 36px;
}

.home-hero__summary {
    max-width: 680px;
    margin: 18px 0 0;
    color: #4b5961;
    font-size: 17px;
}

.home-actions {
    display: grid;
    gap: 12px;
    margin-top: 28px;
}

.home-button {
    display: inline-flex;
    min-height: 46px;
    align-items: center;
    justify-content: center;
    padding: 12px 18px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
}

.home-button--primary {
    background: #176b5d;
    color: #ffffff;
}

.home-button--secondary {
    border: 1px solid #9fb0b7;
    background: #ffffff;
    color: #26343b;
}

.home-section {
    padding: 32px 0;
}

.section-heading {
    margin-bottom: 16px;
}

.section-heading h2 {
    font-size: 28px;
}

.test-card,
.feature-card,
.brand-note {
    border: 1px solid #d7dee2;
    border-radius: 8px;
    background: #ffffff;
}

.test-card {
    display: grid;
    gap: 18px;
    padding: 20px;
}

.test-card h3 {
    font-size: 22px;
}

.test-card p,
.feature-card p,
.brand-note p {
    margin: 10px 0 0;
    color: #4b5961;
}

.feature-grid {
    display: grid;
    gap: 14px;
}

.feature-card {
    padding: 20px;
}

.feature-card h2 {
    font-size: 21px;
}

.brand-note {
    padding: 22px;
}

.brand-note h2 {
    font-size: 25px;
}

.brand-note p {
    max-width: 760px;
}

.site-footer {
    border-top: 1px solid #d7dee2;
    background: #ffffff;
}

.site-footer__inner {
    width: 100%;
    max-width: 1080px;
    margin: 0 auto;
    padding: 22px 16px;
    color: #5c6970;
    font-size: 13px;
}

.site-footer p {
    margin: 6px 0;
}

.site-footer a {
    color: #4b5961;
    text-decoration: none;
}

.site-footer a:hover {
    text-decoration: underline;
}

@media (min-width: 640px) {
    .home-page {
        padding: 32px 24px 72px;
    }

    .home-hero {
        min-height: 600px;
        padding: 128px 0 42px;
    }

    .home-hero h1 {
        font-size: 52px;
    }

    .home-actions {
        display: flex;
        flex-wrap: wrap;
    }

    .home-button {
        min-width: 164px;
    }

    .test-card {
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: center;
        padding: 24px;
    }

    .feature-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .site-footer__inner {
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
        align-items: center;
        justify-content: space-between;
        padding: 24px;
    }
}