/* /css/pages/about.css */
.page-main-content section {
    width: 100%;
    overflow: hidden;
}

.section-title {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem auto;
}

.section-title h2 {
    font-size: 2.15rem;
    font-weight: 650;
    color: var(--dark-color);
    margin-bottom: 1rem;
    line-height: 1.38;
    letter-spacing: 0;
}

.section-title p {
    font-size: 1rem;
    color: var(--subText-color);
    line-height: 1.75;
}

.section-tag {
    display: inline-block;
    font-size: 0.82rem;
    font-weight: 650;
    color: var(--theme-color);
    margin-bottom: 1rem;
    letter-spacing: 0;
}

.about-hero {
    height: 100vh;
    min-height: 700px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 2rem;
    position: relative;
    background:
        linear-gradient(rgba(148, 163, 184, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, 0.045) 1px, transparent 1px),
        radial-gradient(circle at 50% 40%, rgba(107, 120, 154, 0.08) 0%, rgba(17, 24, 39, 0) 46%),
        var(--white-color);
    background-size: 52px 52px, 52px 52px, auto, auto;
}

.hero-content {
    max-width: 860px;
    animation: fadeInHero 1s ease-out 0.2s forwards;
    opacity: 0;
}

@keyframes fadeInHero {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-tag {
    display: inline-block;
    font-size: 0.9rem;
    font-weight: 550;
    color: var(--subText-color);
    margin-bottom: 1rem;
}

.hero-title {
    font-size: clamp(2.65rem, 4.7vw, 4.25rem);
    font-weight: 650;
    color: var(--dark-color);
    line-height: 1.2;
    margin-bottom: 1.5rem;
    letter-spacing: 0;
}

.hero-title .highlight {
    color: #93a4bd;
    font-weight: 650;
    text-decoration: underline;
    text-decoration-color: rgba(77, 192, 181, 0.46);
    text-decoration-thickness: 0.08em;
    text-underline-offset: 0.14em;
}

.hero-subtitle {
    font-size: 1.06rem;
    color: var(--subText-color);
    line-height: 1.82;
    max-width: 760px;
    margin: 0 auto;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--subText-color);
    font-size: 0.75rem;
    letter-spacing: 1px;
    opacity: 0;
    animation: fadeInHero 1s ease-out 1s forwards;
}

.scroll-indicator span {
    margin-bottom: 0.5rem;
}

.scroll-indicator .line {
    width: 1px;
    height: 40px;
    background-color: var(--subText-color);
    position: relative;
    overflow: hidden;
}

.scroll-indicator .line::after {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent, var(--dark-color), transparent);
    animation: scrollDown 2s ease-out infinite;
}

@keyframes scrollDown {
    0% { transform: translateY(0); }
    100% { transform: translateY(200%); }
}

.narrative-section {
    padding: 6rem 0;
    background-color: var(--white-color);
}

.narrative-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    flex-direction: column;
    gap: 7rem;
}

.narrative-item {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
    align-items: center;
}

.narrative-item.has-image {
    grid-template-columns: 1fr 1fr;
}

.narrative-item.has-image:nth-child(even) .narrative-image-wrapper {
    order: 2;
}

.narrative-item.mission .narrative-text-wrapper,
.narrative-item.values .narrative-text-wrapper {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.narrative-image-wrapper {
    width: 100%;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #374151;
    box-shadow: none;
}

.narrative-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.narrative-text-wrapper h2 {
    font-size: 2.15rem;
    font-weight: 650;
    margin-bottom: 1.5rem;
    color: var(--dark-color);
    line-height: 1.38;
    letter-spacing: 0;
}

.narrative-text-wrapper p {
    color: var(--subText-color);
    margin-bottom: 1.5rem;
    font-size: 1rem;
    line-height: 1.82;
}

.ceo-signature {
    margin-top: 2rem;
    text-align: left;
}

.ceo-signature p {
    margin-bottom: 0.5rem;
    color: var(--subText-color);
}

.ceo-signature h3 {
    font-size: 1.35rem;
    font-weight: 650;
    color: #ffffff;
    text-shadow: 0 1px 12px rgba(0, 0, 0, 0.45);
}

.value-list {
    list-style: none;
    padding: 0;
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.narrative-item.values .value-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    text-align: left;
}

.value-list li strong {
    display: block;
    font-size: 1rem;
    font-weight: 650;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.value-list li p {
    font-size: 0.95rem;
    line-height: 1.72;
    margin-bottom: 0;
}

.cta-section {
    padding: 6rem 2rem;
    text-align: center;
    background-color: var(--white-color);
}

.cta-content h2 {
    font-size: 2rem;
    font-weight: 650;
    color: var(--dark-color);
    margin-bottom: 1rem;
    line-height: 1.38;
}

.cta-content p {
    font-size: 1rem;
    color: var(--subText-color);
    margin-bottom: 2rem;
    line-height: 1.75;
}

@media (max-width: 900px) {
    .narrative-item.has-image {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .narrative-item.has-image:nth-child(even) .narrative-image-wrapper {
        order: 0;
    }
    .narrative-text-wrapper {
        text-align: center;
    }
    .ceo-signature {
        text-align: center;
    }
    .value-list li {
        text-align: left;
    }
}

@media (max-width: 768px) {
    .section-title h2,
    .narrative-text-wrapper h2 {
        font-size: 1.75rem;
    }

    .hero-title {
        font-size: 2.15rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }

    .narrative-item.values .value-list {
        grid-template-columns: 1fr;
    }

}

/* Desktop industrial tone alignment */
.page-main-content {
    background: #f3f5f8;
}

.about-hero {
    min-height: calc(100vh - 60px);
    align-items: flex-start;
    text-align: left;
    padding: 7rem max(2rem, calc((100vw - 1280px) / 2 + 2rem)) 5rem;
    background:
        linear-gradient(90deg, rgba(9, 16, 30, 0.9) 0%, rgba(9, 16, 30, 0.78) 44%, rgba(9, 16, 30, 0.22) 100%),
        url('/files/imgs/common/gigaflops_background.png') center / cover no-repeat;
}

.about-hero::after {
    content: '';
    position: absolute;
    inset: 6rem max(1rem, calc((100vw - 1280px) / 2 + 1rem)) 3rem;
    border: 1px solid rgba(255, 255, 255, 0.22);
    pointer-events: none;
}

.hero-content {
    max-width: 880px;
}

.hero-tag {
    color: #d3deea;
    padding-left: 3.25rem;
    position: relative;
}

.hero-tag::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 2.4rem;
    height: 1px;
    background: #d3deea;
}

.hero-title {
    color: #fff;
    font-size: clamp(3rem, 5.4vw, 5.8rem);
    font-weight: 700;
}

.hero-title .highlight {
    color: #fff;
    text-decoration-color: rgba(77, 192, 181, 0.8);
}

.hero-subtitle {
    color: rgba(255, 255, 255, 0.78);
    margin: 0;
}

.scroll-indicator {
    display: none;
}

.narrative-section,
.cta-section {
    background: #f3f5f8;
}

.narrative-container,
.field-response-container {
    max-width: 1280px;
}

.narrative-image-wrapper {
    border-radius: 0;
    border-color: #d8dee8;
    box-shadow: none;
}

.narrative-image-wrapper {
    background: #dfe5ee;
}

.narrative-text-wrapper h2,
.section-title h2,
.cta-content h2,
.value-list li strong {
    color: #111827;
}

.narrative-text-wrapper p,
.section-title p,
.cta-content p,
.value-list li p {
    color: #667085;
}

.cta-section .cta-button {
    color: #ffffff;
    background-color: var(--theme-color);
    border-color: var(--theme-color);
    box-shadow: 0 12px 28px rgba(59, 130, 246, 0.32);
}

.cta-section .cta-button:hover {
    color: #ffffff;
    background-color: #2563eb;
    border-color: #2563eb;
}

.section-tag {
    color: #5b6684;
}

.field-response-section {
    padding: 6.5rem 2rem;
    background: #e9eef5;
}

.field-response-container {
    max-width: 1280px;
    margin: 0 auto;
}

.field-finder {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    min-height: 430px;
    background: #ffffff;
    border: 1px solid #d8dee8;
}

.field-tabs {
    display: flex;
    flex-direction: column;
    border-right: 1px solid #d8dee8;
    background: #f3f5f8;
}

.field-tab {
    min-height: 142px;
    padding: 1.4rem 1.2rem;
    border: 0;
    border-bottom: 1px solid #d8dee8;
    background: transparent;
    color: #4b5563;
    font-family: 'Pretendard', sans-serif;
    font-size: 1.05rem;
    font-weight: 650;
    text-align: left;
    cursor: pointer;
}

.field-tab:hover,
.field-tab.is-active {
    background: #111827;
    color: #ffffff;
}

.field-duct-wrap {
    position: relative;
    padding: 3rem;
}

.field-duct {
    display: none;
}

.field-duct.is-active {
    display: grid;
    grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
    gap: 3rem;
    align-items: start;
}

.field-problem {
    border-left: 3px solid #6b789a;
    padding-left: 1.4rem;
}

.field-problem span {
    display: block;
    margin-bottom: 0.8rem;
    color: #6b789a;
    font-size: 0.78rem;
    font-weight: 700;
}

.field-problem strong {
    display: block;
    color: #111827;
    font-size: 1.85rem;
    line-height: 1.35;
    margin-bottom: 1rem;
}

.field-problem p {
    margin: 0;
    color: #667085;
    font-size: 1rem;
    line-height: 1.78;
}

.field-response-list {
    list-style: none;
    margin: 0;
    padding: 0;
    border-top: 1px solid #d8dee8;
}

.field-response-list li {
    display: grid;
    grid-template-columns: minmax(160px, 0.55fr) minmax(0, 1fr);
    gap: 1.2rem;
    padding: 1.2rem 0;
    border-bottom: 1px solid #d8dee8;
}

.field-response-list strong {
    color: #111827;
    font-size: 0.98rem;
}

.field-response-list span {
    color: #667085;
    font-size: 0.95rem;
    line-height: 1.65;
}

@media (max-width: 860px) {
    .field-finder,
    .field-duct.is-active,
    .field-response-list li {
        grid-template-columns: 1fr;
    }

    .field-tabs {
        border-right: 0;
        border-bottom: 1px solid #d8dee8;
    }

    .field-tab {
        min-height: auto;
    }

    .field-duct-wrap {
        padding: 1.6rem;
    }
}