@media (max-width: 1080px) {
    .hero-inner {
        gap: 44px;
        grid-template-columns: minmax(0, 1.05fr) minmax(330px, 0.95fr);
    }

    .hero-copy h1 {
        font-size: clamp(3.2rem, 6.8vw, 5rem);
    }

    .card-grid.four-col {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .number-card {
        min-height: 270px;
    }

    .footer-main {
        grid-template-columns: 1.4fr 0.7fr 1fr;
    }

    .footer-company {
        grid-column: 2 / -1;
    }

    .solution-row {
        grid-template-columns: 60px 0.8fr 1.2fr;
    }
}

@media (max-width: 860px) {
    .container {
        width: min(calc(100% - 36px), var(--container));
    }

    .header-inner {
        min-height: 72px;
    }

    .nav-toggle {
        position: relative;
        z-index: 2;
        display: block;
    }

    .gnb {
        position: fixed;
        inset: 0;
        display: flex;
        padding: 110px 24px 38px;
        flex-direction: column;
        align-items: stretch;
        justify-content: space-between;
        gap: 32px;
        background: rgba(5, 13, 23, 0.985);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-12px);
        transition: opacity var(--transition), transform var(--transition);
    }

    .gnb.is-open {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    .gnb-links {
        display: grid;
        align-items: stretch;
    }

    .gnb-links a {
        padding: 15px 4px;
        border-bottom: 1px solid var(--line-dark);
        font-size: 1.4rem;
    }

    .gnb-links a::after {
        display: none;
    }

    .header-contact {
        min-height: 54px;
        justify-content: center;
    }

    .section {
        padding: 88px 0;
    }

    .section-compact {
        padding: 64px 0;
    }

    .section-head {
        display: block;
        margin-bottom: 38px;
    }

    .section-head .text-link {
        margin-top: 20px;
    }

    .hero,
    .hero-inner {
        min-height: auto;
    }

    .hero-inner {
        padding: 142px 0 82px;
        grid-template-columns: 1fr;
        gap: 58px;
    }

    .system-panel {
        max-width: 620px;
    }

    .expertise-inner {
        grid-template-columns: 1fr;
    }

    .expertise-title {
        min-height: 60px;
        justify-content: center;
    }

    .expertise-list {
        grid-template-columns: repeat(5, 1fr);
        border-top: 1px solid var(--line);
    }

    .expertise-list span {
        min-height: 62px;
        padding: 0 8px;
        font-size: 0.75rem;
    }

    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .process-step,
    .process-step:not(:first-child) {
        min-height: 210px;
        padding: 28px;
        border-right: 1px solid var(--line);
        border-bottom: 1px solid var(--line);
    }

    .process-step:nth-child(2n) {
        border-right: 0;
    }

    .process-step:nth-last-child(-n + 2) {
        border-bottom: 0;
    }

    .process-step span {
        margin-bottom: 32px;
    }

    .work-grid {
        grid-template-columns: 1fr;
    }

    .work-grid .project-card:first-child,
    .work-grid .project-card:not(:first-child) {
        min-height: 420px;
        grid-row: auto;
    }

    .solution-row {
        padding: 32px;
        grid-template-columns: 48px 1fr;
    }

    .solution-detail {
        grid-column: 2;
    }

    .case-study {
        grid-template-columns: 1fr;
    }

    .history-year {
        grid-template-columns: 140px 1fr;
        gap: 28px;
    }

    .case-visual {
        min-height: 280px;
    }

    .about-intro {
        grid-template-columns: 1fr;
        gap: 34px;
    }

    .service-intro,
    .service-fit {
        grid-template-columns: 1fr;
        gap: 38px;
    }

    .faq-layout {
        grid-template-columns: 1fr;
        gap: 38px;
    }

    .value-grid {
        grid-template-columns: 1fr;
    }

    .value-card {
        min-height: auto;
    }

    .value-card h3 {
        margin-top: 44px;
    }

    .contact-layout {
        grid-template-columns: 1fr;
    }

    .contact-summary {
        position: static;
    }

    .cta-panel {
        padding: 48px;
        align-items: flex-start;
        flex-direction: column;
    }

    .footer-main {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-company {
        grid-column: auto;
    }
}

@media (max-width: 600px) {
    .container {
        width: min(calc(100% - 28px), var(--container));
    }

    .brand-logo {
        width: 146px;
    }

    .hero-inner {
        padding-top: 126px;
    }

    .hero-copy h1 {
        font-size: clamp(2.75rem, 14vw, 4rem);
    }

    .hero-lead {
        font-size: 1rem;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .system-panel {
        padding: 16px;
        border-radius: 20px;
    }

    .system-flow {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .flow-line {
        width: 1px;
        height: 22px;
        justify-self: center;
    }

    .flow-line::after {
        top: auto;
        right: -3px;
        bottom: 0;
        transform: rotate(135deg);
    }

    .panel-metrics {
        grid-template-columns: 1fr;
    }

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

    .expertise-list span {
        border-bottom: 1px solid var(--line);
    }

    .expertise-list span:last-child {
        grid-column: 1 / -1;
    }

    .card-grid.two-col,
    .card-grid.three-col,
    .card-grid.four-col,
    .form-grid {
        grid-template-columns: 1fr;
    }

    .contact-process-grid {
        grid-template-columns: 1fr;
    }

    .contact-process-card {
        min-height: auto;
    }

    .contact-process-card h3 {
        margin-top: 38px;
    }

    .number-card {
        min-height: auto;
    }

    .number-card .card-number {
        margin-bottom: 42px;
    }

    .process-grid {
        grid-template-columns: 1fr;
    }

    .process-step,
    .process-step:not(:first-child) {
        min-height: auto;
        padding: 28px 0;
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .process-step:nth-last-child(2) {
        border-bottom: 1px solid var(--line);
    }

    .process-step span {
        margin-bottom: 22px;
    }

    .project-card {
        padding: 28px;
    }

    .solution-row {
        padding: 28px;
        grid-template-columns: 1fr;
    }

    .solution-detail {
        grid-column: auto;
    }

    .case-content,
    .case-visual {
        padding: 28px;
    }

    .case-points {
        grid-template-columns: 1fr;
    }

    .history-year {
        padding: 32px 0;
        grid-template-columns: 1fr;
        gap: 22px;
    }

    .history-items {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .page-hero {
        padding: 140px 0 76px;
    }

    .page-hero h1 {
        font-size: clamp(2.65rem, 13vw, 4rem);
    }

    .cta-panel {
        padding: 38px 28px;
        border-radius: var(--radius-lg);
    }

    .cta-panel .btn {
        width: 100%;
    }

    .info-table div,
    .policy-table div,
    .policy-contact p,
    .contact-meta p {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    .form-card,
    .policy-card,
    .card {
        padding: 26px;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .footer-bottom {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}