.page-index {
    max-width: 1390px;
    margin: 0 auto;
    padding: 0 15px;
    box-sizing: border-box;
    overflow-x: hidden;
    color: var(--color-text-main);
    font-family: Arial, sans-serif;
    background-color: var(--color-background);
}

.page-index__hero-banner {
    width: 100%;
    margin: 0;
    overflow: hidden;
    margin-bottom: 20px;
    padding-top: 10px;
}

.page-index__hero-banner img {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 16 / 5;
    object-fit: cover;
    object-position: center;
    border-radius: 8px;
}

.page-index__section-title-container {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 40px 0;
    text-align: center;
    gap: 20px;
}

.page-index__title-line {
    flex-grow: 1;
    height: 2px;
    background: linear-gradient(90deg, transparent 0%, var(--color-border) 50%, transparent 100%);
    max-width: 150px;
}

.page-index__main-title {
    font-size: clamp(1.5rem, 4.5vw, 2.5rem);
    font-weight: bold;
    line-height: 1.2;
    color: var(--color-text-main);
    margin: 0;
    max-width: 800px;
}

.page-index__category-gateway {
    display: grid;
    gap: 15px;
    grid-template-columns: repeat(2, 1fr); /* Mobile default */
    margin-bottom: 60px;
}

.page-index__category-card {
    display: block;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s ease-in-out;
}

.page-index__category-card:hover {
    transform: scale(1.03);
}

.page-index__category-card img {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    display: block;
    filter: none; /* Ensure no grayscale */
    border-radius: 12px;
}

.page-index__article-body {
    max-width: 900px;
    margin: 0 auto 60px auto;
    line-height: 1.8;
    font-size: 16px;
}

.page-index__blockquote {
    background-color: var(--color-card-bg);
    border-left: 5px solid var(--color-primary);
    padding: 20px 30px;
    margin: 40px 0;
    border-radius: 8px;
    font-style: italic;
}

.page-index__blockquote p {
    margin: 0;
    color: var(--color-text-main);
}

.page-index__highlight {
    color: var(--color-primary);
    font-weight: bold;
}

.page-index__section-heading {
    font-size: clamp(1.3rem, 3.5vw, 2rem);
    color: var(--color-primary);
    margin-top: 50px;
    margin-bottom: 25px;
    text-align: center;
    font-weight: bold;
}

.page-index__sub-heading {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    color: var(--color-text-main);
    margin-top: 35px;
    margin-bottom: 15px;
    font-weight: bold;
}

.page-index__article-body p {
    margin-bottom: 1em;
}

.page-index__article-body a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.page-index__article-body a:hover {
    color: var(--color-primary);
}

.page-index__article-figure {
    margin: 40px 0;
    text-align: center;
}

.page-index__article-figure img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    filter: none; /* Ensure no grayscale */
    min-width: 200px; /* Enforce minimum size */
    min-height: 200px;
}

.page-index__article-figure figcaption {
    font-size: 0.9em;
    color: #AAA;
    margin-top: 10px;
}

.page-index__process-list,
.page-index__offer-list {
    list-style: none;
    padding: 0;
    margin: 30px 0;
}

.page-index__process-list li,
.page-index__offer-list li {
    background-color: var(--color-card-bg);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 15px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.page-index__process-list li p,
.page-index__offer-list li {
    font-size: 16px;
    line-height: 1.6;
}

.page-index__list-heading {
    font-size: 1.2em;
    color: var(--color-primary);
    margin-top: 0;
    margin-bottom: 10px;
}

/* Responsive adjustments */
@media (max-width: 849px) {
    .page-index__section-title-container {
        flex-direction: column;
        gap: 10px;
    }
    .page-index__title-line {
        max-width: 100px;
    }
    .page-index__main-title {
        font-size: clamp(1.2rem, 6vw, 2rem);
    }
    .page-index__category-gateway {
        grid-template-columns: repeat(2, 1fr); /* Default for mobile */
    }
    .page-index__article-body {
        padding: 0 10px;
    }
}

@media (min-width: 850px) {
    .page-index__category-gateway {
        grid-template-columns: repeat(6, 1fr); /* PC layout */
    }
}

@media (max-width: 768px) {
    .page-index {
        padding: 0 12px;
    }
    .page-index__hero-banner img,
    .page-index__category-card img,
    .page-index__article-figure img {
        max-width: 100%;
        height: auto;
    }
    .page-index__section-heading {
        font-size: clamp(1.2rem, 5vw, 1.8rem);
    }
    .page-index__sub-heading {
        font-size: clamp(1rem, 4vw, 1.3rem);
    }
    .page-index__blockquote {
        padding: 15px 20px;
    }
    .page-index__article-body p,
    .page-index__process-list li p,
    .page-index__offer-list li {
        font-size: 15px;
    }
    .page-index__title-line {
        max-width: 80px;
    }
}