:root {
    --concept-ink: #14181e;
    --concept-muted: #5f6873;
    --concept-line: #d9dee4;
    --concept-paper: #ffffff;
    --concept-soft: #f2f4f6;
    --concept-navy: #102a4d;
    --concept-blue: #204198;
    --concept-cyan: #18a9c5;
}

* { box-sizing: border-box; }

.concept-page {
    margin: 0;
    overflow-x: hidden;
    background: var(--concept-paper);
    color: var(--concept-ink);
    font-family: 'Pretendard', 'Noto Sans KR', Arial, sans-serif;
}

.concept-page h1,
.concept-page h2,
.concept-page h3,
.concept-page p {
    margin: 0;
    letter-spacing: 0;
}

.concept-shell {
    width: min(1200px, calc(100% - 64px));
    margin: 0 auto;
}

.concept-section { padding: 120px 0; }
.banner .indicator {
    padding: 0;
    border: 0;
    background: transparent;
    color: #a1a1a1;
    cursor: pointer;
    font: inherit;
}

.banner .indicator.active { color: #fff; }

.concept-page .banner h1 {
    margin-block-start: 0.67em;
    margin-block-end: 0.67em;
}

.concept-eyebrow {
    color: #69d5e8;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 0;
}

.concept-eyebrow-dark { color: var(--concept-blue); }

.concept-hero {
    position: relative;
    isolation: isolate;
    display: flex;
    min-height: min(800px, 88svh);
    align-items: center;
    overflow: hidden;
    background: #1e4b78;
    color: #fff;
}

.concept-hero::before {
    position: absolute;
    inset: -4%;
    z-index: -2;
    background-color: #12345d;
    background-image: url('/assets/img/slide-img/semiconductor2.webp');
    background-position: center;
    background-blend-mode: screen;
    background-size: cover;
    content: "";
    filter: brightness(1.42) saturate(0.96);
    transform: scaleX(-1) scale(1.04);
    animation: concept-hero-drift 13s ease-in-out infinite alternate;
}

.concept-hero::after {
    position: absolute;
    bottom: 0;
    left: 0;
    z-index: 2;
    width: 28%;
    height: 3px;
    background: #45cde4;
    content: "";
    transform-origin: left;
    animation: concept-hero-line 6s ease-in-out infinite;
}

.concept-hero-shade {
    position: absolute;
    inset: 0;
    z-index: -1;
    background: rgba(5, 18, 34, 0.08);
}

.concept-hero-content {
    position: relative;
    z-index: 1;
    padding-top: 82px;
}

@keyframes concept-hero-drift {
    from { transform: scaleX(-1) scale(1.04) translateX(0); }
    to { transform: scaleX(-1) scale(1.09) translateX(-1.5%); }
}

@keyframes concept-hero-line {
    0%, 100% { transform: scaleX(0.3); opacity: 0.55; }
    50% { transform: scaleX(1); opacity: 1; }
}

.concept-hero h1 {
    max-width: 720px;
    margin-top: 22px;
    font-size: 72px;
    font-weight: 750;
    line-height: 1.13;
}

.concept-hero-copy {
    max-width: 620px;
    margin-top: 28px !important;
    color: rgba(255, 255, 255, 0.85);
    font-size: 20px;
    line-height: 1.75;
}

.concept-actions {
    display: flex;
    gap: 12px;
    margin-top: 40px;
}

.concept-button {
    display: inline-flex;
    min-height: 50px;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 12px 22px;
    border: 1px solid transparent;
    border-radius: 4px;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.concept-button-primary {
    background: #fff;
    color: var(--concept-navy);
}

.concept-button-primary:hover { background: #eaf1f5; }

.concept-button-ghost {
    border-color: rgba(255, 255, 255, 0.55);
    color: #fff;
}

.concept-button-ghost:hover {
    border-color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.concept-intro-copy {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
    gap: 80px;
    align-items: end;
}

.concept-intro h2,
.concept-section-heading h2,
.concept-engineering h2,
.concept-network h2 {
    margin-top: 18px;
    font-size: 52px;
    font-weight: 720;
    line-height: 1.25;
}

.concept-intro-copy > p {
    padding-bottom: 6px;
    color: var(--concept-muted);
    font-size: 18px;
    line-height: 1.9;
}

.concept-capabilities {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 74px;
    border-top: 1px solid var(--concept-line);
    border-bottom: 1px solid var(--concept-line);
}

.concept-capability {
    position: relative;
    display: flex;
    min-height: 240px;
    flex-direction: column;
    justify-content: center;
    padding: 30px 36px;
    border-right: 1px solid var(--concept-line);
    color: inherit;
    text-decoration: none;
    transition: background-color 180ms ease;
}

.concept-capability:last-child { border-right: 0; }

.concept-capability .concept-number {
    margin-bottom: 24px;
    color: var(--concept-cyan);
    font-size: 12px;
    font-weight: 800;
}

.concept-capability strong { font-size: 24px; }

.concept-capability > span:not(.concept-number) {
    margin-top: 8px;
    color: var(--concept-muted);
    font-size: 15px;
}

.concept-capability > p {
    max-width: 290px;
    margin-top: 12px;
    color: var(--concept-muted);
    font-size: 14px;
    line-height: 1.7;
}

.concept-capability > i {
    position: absolute;
    right: 34px;
    bottom: 34px;
    color: var(--concept-blue);
    transition: transform 180ms ease;
}

.concept-capability:hover { background: #f5f8fa; }
.concept-capability:hover > i { transform: translateX(5px); }

.concept-solutions { background: var(--concept-paper); }
.concept-section-heading { margin-bottom: 76px; }

.concept-solution {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(360px, 0.85fr);
    min-height: 520px;
    align-items: stretch;
    border-top: 1px solid var(--concept-line);
    background: transparent;
}

.concept-solution:last-child { border-bottom: 1px solid var(--concept-line); }
.concept-solution + .concept-solution { margin-top: 0; }

.concept-solution-reverse .concept-solution-media {
    order: 2;
    border-right: 0;
    border-left: 1px solid var(--concept-line);
}

.concept-solution-media {
    display: flex;
    min-width: 0;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-right: 1px solid var(--concept-line);
    background: var(--concept-paper);
}

.concept-solution-media img {
    width: 84%;
    height: 84%;
    object-fit: contain;
    transition: transform 350ms ease;
}

.concept-solution-media:hover img { transform: scale(1.025); }

.concept-solution-copy {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 64px;
}

.concept-solution-index {
    color: var(--concept-blue);
    font-size: 12px;
    font-weight: 800;
}

.concept-solution h3 {
    margin-top: 20px;
    font-size: 34px;
    font-weight: 720;
}

.concept-solution-copy > p {
    margin-top: 20px;
    color: var(--concept-muted);
    font-size: 16px;
    line-height: 1.85;
}

.concept-solution ul {
    display: grid;
    gap: 10px;
    margin: 28px 0 0;
    padding: 24px 0 0;
    border-top: 1px solid var(--concept-line);
    list-style: none;
}

.concept-solution li {
    color: #333b45;
    font-size: 14px;
}

.concept-text-link {
    display: inline-flex;
    width: fit-content;
    align-items: center;
    gap: 10px;
    margin-top: 34px;
    color: var(--concept-blue);
    font-size: 15px;
    font-weight: 750;
    text-decoration: none;
}

.concept-text-link i {
    font-size: 12px;
    transition: transform 180ms ease;
}

.concept-text-link:hover i { transform: translateX(5px); }

.concept-engineering {
    background: #151b23;
    color: #fff;
}

.concept-engineering-heading {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    column-gap: 80px;
    align-items: end;
}

.concept-engineering-heading .concept-eyebrow {
    grid-column: 1 / -1;
}

.concept-engineering-heading > p:last-child {
    padding-bottom: 8px;
    color: #aeb8c4;
    font-size: 17px;
    line-height: 1.8;
}

.concept-process {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin: 72px 0 0;
    padding: 0;
    border-top: 1px solid #414953;
    border-bottom: 1px solid #414953;
    list-style: none;
}

.concept-process li {
    min-height: 270px;
    padding: 30px 26px;
    border-right: 1px solid #414953;
}

.concept-process li:last-child {
    border-right: 0;
}

.concept-process li > span {
    color: #7f8a96;
    font-size: 14px;
    font-weight: 750;
}

.concept-process li > i {
    display: block;
    margin: 42px 0 24px;
    color: #69d5e8;
    font-size: 27px;
}

.concept-process strong {
    display: block;
    font-size: 20px;
}

.concept-process p {
    margin-top: 9px;
    color: #9faab6;
    font-size: 14px;
    line-height: 1.65;
}

.concept-network {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(420px, 0.92fr);
    min-height: 650px;
    background: var(--concept-paper);
}

.concept-network-image {
    min-height: 560px;
    background-image: url('/assets/img/background/semisol-office-main.png');
    background-position: center;
    background-size: cover;
}

.concept-network-content {
    display: flex;
    align-items: center;
    padding: 80px clamp(48px, 7vw, 110px);
}

.concept-network-content > div { max-width: 520px; }

.concept-network-content > div > p:not(.concept-eyebrow) {
    margin-top: 28px;
    color: var(--concept-muted);
    font-size: 17px;
    line-height: 1.85;
}

.concept-location-list {
    display: flex;
    flex-wrap: wrap;
    gap: 11px 24px;
    margin-top: 30px;
    padding-top: 26px;
    border-top: 1px solid var(--concept-line);
}

.concept-location-list span {
    color: #38414b;
    font-size: 12px;
    font-weight: 800;
}

.concept-contact {
    background: var(--concept-navy);
    color: #fff;
}

.concept-contact-inner {
    display: flex;
    min-height: 210px;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.concept-contact h2 {
    margin-top: 12px;
    font-size: 36px;
    font-weight: 700;
}

.concept-button-light {
    flex: 0 0 auto;
    background: #fff;
    color: var(--concept-navy);
}

.concept-button-light:hover { background: #eaf1f5; }

.concept-reveal {
    opacity: 1;
    transform: none;
}

.concept-page.has-reveal .concept-reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 600ms ease, transform 600ms ease;
}


.concept-page.has-reveal .concept-capability:nth-child(2),
.concept-page.has-reveal .concept-process li:nth-child(2) { transition-delay: 80ms; }

.concept-page.has-reveal .concept-capability:nth-child(3),
.concept-page.has-reveal .concept-process li:nth-child(3) { transition-delay: 160ms; }

.concept-page.has-reveal .concept-process li:nth-child(4) { transition-delay: 240ms; }
.concept-page.has-reveal .concept-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 980px) {
    .concept-section { padding: 90px 0; }

    .concept-hero h1 { font-size: 60px; }

    .concept-intro h2,
    .concept-section-heading h2,
    .concept-engineering h2,
    .concept-network h2 { font-size: 44px; }

    .concept-contact h2 { font-size: 32px; }

    .concept-intro-copy,
    .concept-engineering-heading {
        grid-template-columns: minmax(0, 1fr);
        gap: 28px;
    }

    .concept-intro-copy > p,
    .concept-engineering-heading > p:last-child { max-width: 680px; }

    .concept-solution { grid-template-columns: minmax(0, 1fr); }
    .concept-solution-reverse .concept-solution-media { order: 0; }

    .concept-solution-media,
    .concept-solution-reverse .concept-solution-media {
        border-right: 0;
        border-bottom: 1px solid var(--concept-line);
        border-left: 0;
    }
    .concept-solution-media { min-height: 430px; }
    .concept-solution-copy { padding: 54px; }
    .concept-network { grid-template-columns: minmax(0, 1fr); }
    .concept-network-image { min-height: 480px; }
}

@media (max-width: 720px) {
    .concept-shell { width: calc(100% - 36px); }
    .concept-section { padding: 72px 0; }

    .concept-hero { min-height: 680px; }

    .concept-hero::before {
        inset: -2%;
        background-position: 58% center;
    }

    .concept-hero-content { padding-top: 90px; }

    .concept-hero h1 {
        margin-top: 18px;
        font-size: 43px;
    }

    .concept-hero-copy { font-size: 16px; }

    .concept-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .concept-button { width: 100%; }

    .concept-intro h2,
    .concept-section-heading h2,
    .concept-engineering h2,
    .concept-network h2 { font-size: 34px; }

    .concept-intro-copy > p { font-size: 16px; }

    .concept-capabilities {
        grid-template-columns: minmax(0, 1fr);
        margin-top: 48px;
    }

    .concept-capability {
        min-height: 150px;
        padding: 26px 8px;
        border-right: 0;
        border-bottom: 1px solid var(--concept-line);
    }

    .concept-capability:last-child { border-bottom: 0; }
    .concept-capability .concept-number { margin-bottom: 16px; }
    .concept-section-heading { margin-bottom: 48px; }
    .concept-solution-media { min-height: 310px; }
    .concept-solution-copy { padding: 38px 24px 44px; }
    .concept-solution h3 { font-size: 28px; }

    .concept-process {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        margin-top: 48px;
    }

    .concept-process li {
        min-height: 220px;
        padding: 26px 16px;
        border-bottom: 1px solid #414953;
    }

    .concept-process li:nth-child(2) { border-right: 0; }
    .concept-process li:nth-last-child(-n + 2) { border-bottom: 0; }
    .concept-network-image { min-height: 330px; }
    .concept-network-content { padding: 68px 18px; }

    .concept-contact-inner {
        min-height: 270px;
        align-items: stretch;
        flex-direction: column;
        justify-content: center;
        padding: 52px 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .concept-reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .concept-hero::before,
    .concept-hero::after { animation: none; }

    .concept-solution-media img,
    .concept-capability > i,
    .concept-text-link i { transition: none; }
}
/* Concept motion and density refinement */
.concept-story {
    position: relative;
}

.concept-story-line {
    position: absolute;
    top: 170px;
    bottom: 150px;
    left: max(24px, calc(50% - 646px));
    z-index: 3;
    width: 1px;
    background: linear-gradient(to bottom, rgba(32, 65, 152, 0.14) 0 69%, transparent 69% 100%);
    pointer-events: none;
}

.concept-story-line span {
    position: absolute;
    top: 0;
    left: 0;
    width: 1px;
    height: calc(var(--story-progress, 0) * 100%);
    background: linear-gradient(to bottom, var(--concept-blue), var(--concept-cyan));
    box-shadow: 0 0 12px rgba(24, 169, 197, 0.38);
    transition: height 80ms linear;
}

.concept-story-line i {
    position: absolute;
    left: 50%;
    width: 9px;
    height: 9px;
    border: 2px solid #fff;
    border-radius: 50%;
    background: #9aaac0;
    box-shadow: 0 0 0 1px rgba(32, 65, 152, 0.2);
    transform: translate(-50%, -50%);
    transition: background-color 220ms ease, box-shadow 220ms ease;
}

.concept-story-line i:nth-of-type(1) { top: 4%; }
.concept-story-line i:nth-of-type(2) { top: 34%; }
.concept-story-line i:nth-of-type(3) { top: 69%; }

.concept-story-line i.is-passed {
    background: var(--concept-cyan);
    box-shadow: 0 0 0 4px rgba(24, 169, 197, 0.13);
}

.concept-solutions {
    padding-top: 82px;
    padding-bottom: 96px;
}

.concept-section-heading {
    max-width: 720px;
    margin-right: 0;
    margin-bottom: 52px;
    margin-left: auto;
    text-align: right;
}
.concept-solution { min-height: 430px; }

.concept-solution-media img {
    width: 92%;
    height: 88%;
}

.concept-solution-copy { padding: 44px 56px; }

.concept-solution h3 {
    margin-top: 16px;
    font-size: 32px;
}

.concept-solution-copy > p { margin-top: 16px; }

.concept-solution ul {
    margin-top: 22px;
    padding-top: 20px;
}

.concept-text-link { margin-top: 26px; }

.concept-engineering {
    position: relative;
    isolation: isolate;
    overflow: hidden;
}

.concept-engineering::after {
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(90deg, rgba(21, 27, 35, 0.96) 0%, rgba(21, 27, 35, 0.82) 56%, rgba(16, 42, 77, 0.5) 100%);
    content: "";
    pointer-events: none;
}

.concept-particles {
    position: absolute;
    inset: 0;
    z-index: -2;
    width: 100%;
    height: 100%;
    opacity: 0.62;
    pointer-events: none;
}

.concept-network {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(420px, 0.92fr);
    min-height: 650px;
    background: var(--concept-paper);
    color: var(--concept-ink);
}

.concept-network-image {
    position: relative;
    inset: auto;
    z-index: auto;
    min-height: 560px;
    background-image: linear-gradient(90deg, rgba(16, 42, 77, 0.12), rgba(16, 42, 77, 0.58)), url('/assets/img/background/semisol-office-main.png');
    background-position: center 55%;
}

.concept-network::after { content: none; }

.concept-network-content {
    width: auto;
    justify-content: flex-start;
    margin: 0;
    padding: 80px clamp(48px, 7vw, 110px);
}

.concept-network-content > div > p:not(.concept-eyebrow) {
    color: var(--concept-muted);
}

.concept-location-list {
    border-top-color: var(--concept-line);
}

.concept-location-list span {
    color: #38414b;
}

.concept-network .concept-eyebrow-dark,
.concept-network .concept-text-link {
    color: var(--concept-blue);
}

@media (max-width: 980px) {
    .concept-solution-media { min-height: 370px; }
    .concept-network {
        grid-template-columns: minmax(0, 1fr);
        min-height: 0;
    }
    .concept-network-image { min-height: 440px; }
    .concept-network-content {
        width: auto;
        padding: 72px 32px;
    }
}

@media (max-width: 720px) {
    .concept-story-line { display: none; }

    .concept-solutions {
        padding-top: 62px;
        padding-bottom: 72px;
    }

    .concept-section-heading { margin-bottom: 40px; }
    .concept-solution-media { min-height: 290px; }

    .concept-network { min-height: 0; }
    .concept-network-image {
        min-height: 320px;
        background-position: 34% center;
    }

    .concept-network-content {
        width: auto;
        align-items: center;
        justify-content: flex-start;
        padding: 64px 18px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .concept-story-line span { transition: none; }
    .concept-particles { opacity: 0.34; }
}/* Final mobile layout overrides */
@media (max-width: 720px) {
    .concept-eyebrow { font-size: 13px; }

    .concept-page #_header { padding: 15px 18px; }
    .concept-page #_header .logo { width: 132px; }
    .concept-page #_header .mnu { padding: 8px; font-size: 26px; }

    .concept-page .banner { height: 50svh; min-height: 390px; }
    .concept-page .banner .text { right: 20px; bottom: 18%; left: 20px; width: auto; }
    .concept-page .banner h1 {
        margin: 0 0 18px;
        font-size: 34px;
        line-height: 1.18;
        word-break: keep-all;
    }
    html[lang="en"] .concept-page .banner h1 { font-size: 30px; }
    .concept-page .banner p {
        margin-left: auto;
        font-size: 14px;
        line-height: 1.55;
    }
    .concept-page .slide-indicator {
        right: 20px;
        bottom: 24px;
        gap: 12px;
        font-size: 17px;
    }
    .concept-page .slide-bar { width: 96px; margin-left: 4px; }

    .concept-shell { width: calc(100% - 40px); }
    .concept-section { padding: 64px 0; }
    .concept-intro h2,
    .concept-section-heading h2,
    .concept-engineering h2,
    .concept-network h2 {
        margin-top: 12px;
        font-size: 28px;
        line-height: 1.32;
        word-break: keep-all;
    }
    html[lang="en"] .concept-intro h2,
    html[lang="en"] .concept-section-heading h2,
    html[lang="en"] .concept-engineering h2,
    html[lang="en"] .concept-network h2 { font-size: 27px; }

    .concept-intro-copy,
    .concept-engineering-heading { gap: 20px; }
    .concept-intro-copy > p,
    .concept-engineering-heading > p:last-child,
    .concept-network-content > div > p:not(.concept-eyebrow) {
        font-size: 15px;
        line-height: 1.75;
    }

    .concept-capabilities { margin-top: 40px; }
    .concept-capability { min-height: 0; padding: 24px 0; }
    .concept-capability .concept-number { margin-bottom: 12px; }
    .concept-capability strong {
        padding-right: 32px;
        font-size: 20px;
        line-height: 1.4;
        word-break: keep-all;
    }
    .concept-capability > p { max-width: calc(100% - 32px); margin-top: 8px; }
    .concept-capability > i { right: 2px; bottom: 28px; }

    .concept-solutions { padding-top: 56px; padding-bottom: 64px; }
    .concept-section-heading { max-width: 100%; margin-bottom: 32px; }
    .concept-solution { min-height: 0; }
    .concept-solution-media { min-height: 230px; }
    .concept-solution-media img { width: 96%; height: 92%; }
    .concept-solution-copy { padding: 32px 0 42px; }
    .concept-solution h3 {
        margin-top: 14px;
        font-size: 26px;
        line-height: 1.35;
        word-break: keep-all;
    }
    .concept-solution-copy > p {
        margin-top: 14px;
        font-size: 15px;
        line-height: 1.75;
    }
    .concept-solution ul { margin-top: 20px; padding-top: 18px; }
    .concept-text-link { margin-top: 24px; }

    .concept-process { margin-top: 40px; }
    .concept-process li { min-height: 180px; padding: 22px 14px; }
    .concept-process li > i { margin: 26px 0 18px; font-size: 24px; }
    .concept-process strong {
        font-size: 17px;
        line-height: 1.4;
        word-break: keep-all;
    }
    .concept-process p { font-size: 13px; }

    .concept-network-image { min-height: 260px; }
    .concept-network-content { padding: 56px 20px; }
    .concept-network-content > div > p:not(.concept-eyebrow) { margin-top: 20px; }
    .concept-location-list {
        gap: 10px 18px;
        margin-top: 24px;
        padding-top: 20px;
    }

    .concept-contact-inner {
        min-height: 230px;
        gap: 28px;
        padding: 42px 0;
    }
    .concept-contact h2 {
        font-size: 26px;
        line-height: 1.35;
        word-break: keep-all;
    }

    .concept-page .footer-section { padding: 32px 20px; }
    .concept-page .footer-logo img { width: 126px; }
    .concept-page .footer-info p { font-size: 12px; line-height: 1.55; }
}

@media (max-width: 360px) {
    .concept-shell { width: calc(100% - 32px); }
    .concept-page .banner h1 { font-size: 31px; }
    html[lang="en"] .concept-page .banner h1 { font-size: 27px; }
    .concept-intro h2,
    .concept-section-heading h2,
    .concept-engineering h2,
    .concept-network h2 { font-size: 26px; }
    .concept-solution h3,
    .concept-contact h2 { font-size: 24px; }
}