/* ---------------------------------- */
        /* # DESIGN SYSTEM & RESET */
        /* ---------------------------------- */
        :root {
            --bg-void: #0a0e14;
            --bg-surface: #111820;
            --bg-elevated: #1a2230;
            --bg-glass: rgba(35,183,237,0.04);
            --border-subtle: rgba(35,183,237,0.10);
            --border-hover: rgba(35,183,237,0.25);
            --text-primary: #e8edf3;
            --text-secondary: rgba(232,237,243,0.65);
            --text-muted: rgba(232,237,243,0.35);
            --accent: #23b7ed;
            --accent-glow: rgba(35,183,237,0.15);
            --accent-deep: #0066aa;
            --bg-light: #f4f6f8;
            --text-on-light: #1a2230;
            --text-on-light-secondary: #4a5568;

            --font-heading: 'Shippori Mincho B1', serif;
            --font-body: 'Noto Sans JP', sans-serif;
            --font-number: 'Bebas Neue', cursive;
            --font-en: 'Outfit', sans-serif;

            --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
            --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
        }

        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-void);
            color: var(--text-primary);
            font-family: var(--font-body);
            font-weight: 300;
            font-feature-settings: "palt";
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .noise-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 250 250' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
            opacity: 0.02;
            pointer-events: none;
            z-index: 9999;
        }

        /* ---------------------------------- */
        /* # GLOBAL & UTILITY */
        /* ---------------------------------- */
        .site-container {
            overflow-x: hidden;
        }
        
        .section-label {
            font-family: var(--font-en);
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.1em;
            margin-bottom: 1.5rem;
            display: block;
        }

        .button {
            display: inline-block;
            padding: 0.8rem 2rem;
            border-radius: 6px;
            font-family: var(--font-body);
            font-weight: 700;
            text-decoration: none;
            transition: all 0.3s var(--ease-out-quart);
            cursor: pointer;
            border: none;
        }
        .button--primary {
            background-color: var(--accent);
            color: #ffffff;
        }
        .button--primary:hover {
            background-color: #55ceff;
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(35,183,237,0.2);
        }
        .button--secondary {
            background-color: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-subtle);
        }
        .button--secondary:hover {
            background-color: var(--bg-surface);
            border-color: var(--border-hover);
        }

        /* ---------------------------------- */
        /* 1. HEADER */
        /* ---------------------------------- */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            padding: 1.5rem 5%;
            z-index: 1000;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background-color 0.4s ease, backdrop-filter 0.4s ease;
        }
        .site-header.scrolled {
            background-color: rgba(10, 14, 20, 0.7);
            backdrop-filter: blur(10px);
        }
        .header-logo {
            font-family: var(--font-body);
            font-weight: 700;
            font-size: 1.25rem;
            text-decoration: none;
            color: var(--text-primary);
        }
        .header-logo span {
            font-family: var(--font-en);
            font-size: 0.8em;
            font-weight: 400;
            color: var(--text-secondary);
            margin-left: 0.5rem;
        }
        .header-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .header-nav a {
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }
        .header-nav a:hover {
            color: var(--text-primary);
        }
        .header-menu-button {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid var(--border-subtle);
            border-radius: 6px;
            background: rgba(17,24,32,0.66);
            color: var(--text-primary);
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
        }
        .header-menu-button span {
            display: block;
            width: 18px;
            height: 2px;
            background: currentColor;
            transition: transform 0.25s ease, opacity 0.25s ease;
        }
        .site-header.menu-open .header-menu-button span:first-child {
            transform: translateY(4px) rotate(45deg);
        }
        .site-header.menu-open .header-menu-button span:last-child {
            transform: translateY(-4px) rotate(-45deg);
        }

        /* ---------------------------------- */
        /* 2. HERO */
        /* ---------------------------------- */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 0 5%;
            position: relative;
            overflow: hidden;
        }
        .hero__background {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image:
                linear-gradient(90deg, rgba(10, 14, 20, 0.92) 0%, rgba(10, 14, 20, 0.72) 45%, rgba(10, 14, 20, 0.28) 100%),
                url('../images/generated/sankou-sign-hero.png');
            background-position: center;
            background-size: cover;
            background-repeat: no-repeat;
            z-index: -2;
            will-change: transform;
        }
        .hero__background::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(circle at 1px 1px, rgba(35,183,237,0.12) 1px, transparent 0);
            background-size: 22px 22px;
            opacity: 0.28;
        }
        .hero__background-glow {
            position: absolute;
            top: 50%;
            left: 50%;
            width: 80vw;
            height: 80vh;
            background: radial-gradient(ellipse at center, var(--accent-glow) 0%, rgba(10,14,20,0) 60%);
            transform: translate(-50%, -50%);
            z-index: -1;
        }
        .hero__content {
            max-width: 900px;
            position: relative;
            z-index: 2;
        }
        .hero__label {
            font-family: var(--font-en);
            font-weight: 600;
            color: var(--text-secondary);
            letter-spacing: 0.1em;
            margin-bottom: 1rem;
        }
        .hero__title {
            font-family: var(--font-heading);
            font-size: clamp(2rem, 4vw, 3.5rem);
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 2rem;
            letter-spacing: 0.02em;
        }
        .hero__title .line {
            display: block;
            overflow: hidden;
        }
        .hero__title .line-inner {
            display: block;
        }
        .mobile-title-break {
            display: inline;
        }
        .hero__subtitle {
            font-size: 1.1rem;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 500px;
            margin-bottom: 2.5rem;
        }
        .hero__cta {
            display: flex;
            gap: 1rem;
        }
        .hero__scroll-indicator {
            position: absolute;
            bottom: 2rem;
            left: 50%;
            transform: translateX(-50%);
            width: 2px;
            height: 50px;
            background-color: var(--border-subtle);
        }
        .hero__scroll-indicator::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 20px;
            background-color: var(--accent);
            animation: pulse-scroll 2s infinite ease-in-out;
        }
        @keyframes pulse-scroll {
            0% { transform: translateY(0); opacity: 1; }
            50% { transform: translateY(30px); opacity: 1; }
            100% { transform: translateY(30px); opacity: 0; }
        }

        /* ---------------------------------- */
        /* 3. INTRO / STRENGTHS */
        /* ---------------------------------- */
        .intro-strengths {
            display: flex;
            width: 100%;
            min-height: 100vh;
            position: relative;
            padding: 10rem 0;
            background-color: var(--bg-void);
        }
        .intro-strengths__giant-text {
            width: 60%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-number);
            font-size: 35vw;
            line-height: 0.8;
            color: rgba(35,183,237,0.12);
            -webkit-text-stroke: 2px rgba(35,183,237,0.25);
            text-stroke: 2px rgba(35,183,237,0.25);
            position: relative;
            left: -5%;
            overflow: hidden;
        }
        .intro-strengths__content {
            width: 40%;
            padding: 4rem 5% 4rem 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .intro-strengths__title {
            font-family: var(--font-heading);
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 600;
            margin-bottom: 4rem;
        }
        .strength-card {
            margin-bottom: 3rem;
        }
        .strength-card__title {
            font-family: var(--font-heading);
            font-size: 1.75rem;
            font-weight: 600;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
        }
        .strength-card__title::before {
            content: '';
            display: inline-block;
            width: 20px;
            height: 2px;
            background-color: var(--accent);
            margin-right: 1rem;
        }
        .strength-card__text {
            color: var(--text-secondary);
            line-height: 1.8;
            padding-left: 36px;
        }

        /* ---------------------------------- */
        /* 4. SERVICES (Sticky Scroll) */
        /* ---------------------------------- */
        .services {
            position: relative;
            padding-top: 10rem;
        }
        .services__sticky-container {
            display: flex;
            width: 100%;
            position: relative;
            /* 高さはコンテンツ側(service-item × 6)が自動で決める */
        }
        .services__image-wrapper {
            width: 50%;
            height: 100vh;
            position: relative; /* GSAP will pin this */
            align-self: flex-start;
            background: var(--bg-surface);
            overflow: hidden;
        }
        .services__image {
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center;
            position: absolute;
            top: 0; left: 0;
            opacity: 0;
            transition: opacity 0.6s ease;
        }
        .services__image.active {
            opacity: 0.6;
        }
        .services__image-overlay {
            width: 100%;
            height: 100%;
            position: absolute;
            top: 0; left: 0;
            background-color: var(--accent-glow);
            transition: background-color 0.5s ease;
            mix-blend-mode: multiply;
        }
        .services__content-wrapper {
            width: 50%;
            position: relative;
        }
        .service-item {
            height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 0 10%;
        }
        .service-item__title {
            font-family: var(--font-heading);
            font-size: clamp(2rem, 4vw, 3.2rem);
            font-weight: 600;
            margin-bottom: 2rem;
            opacity: 0;
            transform: translateY(30px);
        }
        .service-item__text {
            color: var(--text-secondary);
            font-size: 1.1rem;
            line-height: 1.9;
            opacity: 0;
            transform: translateY(30px);
        }
        .services__heading-wrapper {
             padding: 0 5% 3rem;
        }
        .services__main-title {
            font-family: var(--font-heading);
            font-size: clamp(3rem, 7vw, 5rem);
        }

        /* ---------------------------------- */
        /* 5. PROCESS FLOW */
        /* ---------------------------------- */
        .process-flow {
            padding: 8rem 0;
            position: relative;
            background-color: var(--bg-surface);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
            z-index: 1;
        }
        .process-flow__container {
            width: 90%;
            max-width: 1100px;
            margin: 0 auto;
            position: relative;
        }
        .process-flow__items {
            display: flex;
            justify-content: space-between;
            position: relative;
            padding: 0 2%;
        }
        /* ライン：ノードの中心を水平に結ぶ */
        .process-flow__items::before {
            content: '';
            position: absolute;
            top: 20px; /* ノード中心に合わせる */
            left: 5%;
            right: 5%;
            height: 2px;
            background: var(--border-subtle);
            z-index: 0;
        }
        .process-flow__line-progress {
            position: absolute;
            top: 20px;
            left: 5%;
            height: 2px;
            width: 0;
            background: var(--accent);
            z-index: 1;
            max-width: 90%;
        }
        .process-flow-item {
            text-align: center;
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 16px;
        }
        .process-flow-item__node {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-surface);
            border: 2px solid var(--border-subtle);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-en);
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: all 0.5s ease;
        }
        .process-flow-item.is-active .process-flow-item__node {
            background: var(--accent);
            border-color: var(--accent);
            color: var(--bg-void);
            box-shadow: 0 0 20px var(--accent-glow);
        }
        .process-flow-item__title {
            font-family: var(--font-heading);
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-secondary);
            transition: color 0.5s ease;
        }
        .process-flow-item.is-active .process-flow-item__title {
            color: var(--text-primary);
        }

        /* ---------------------------------- */
        /* 6. WORKS (Horizontal Scroll) */
        /* ---------------------------------- */
        .works {
            padding: 10rem 0;
            position: relative;
        }
        .works__header {
            width: 90%;
            max-width: 1400px;
            margin: 0 auto 4rem auto;
        }
        .works__title {
            font-family: var(--font-heading);
            font-size: clamp(3rem, 7vw, 5rem);
            margin-bottom: 1rem;
        }
        .works__gallery-wrapper {
            position: relative;
        }
        .works__gallery-wrapper::before, .works__gallery-wrapper::after {
            content: '';
            position: absolute;
            top: 0;
            height: 100%;
            width: 10%;
            z-index: 2;
            pointer-events: none;
        }
        .works__gallery-wrapper::before {
            left: 0;
            background: linear-gradient(to right, var(--bg-void), transparent);
        }
        .works__gallery-wrapper::after {
            right: 0;
            background: linear-gradient(to left, var(--bg-void), transparent);
        }
        .works__gallery {
            display: flex;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            padding: 2rem 5%;
            gap: 2rem;
            -ms-overflow-style: none; /* IE and Edge */
            scrollbar-width: none; /* Firefox */
        }
        .works__gallery::-webkit-scrollbar {
            display: none; /* Chrome, Safari, Opera */
        }
        .work-card {
            flex: 0 0 clamp(300px, 40vw, 500px);
            scroll-snap-align: center;
            background-color: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            border-radius: 12px;
            overflow: hidden;
            color: inherit;
            display: block;
            text-decoration: none;
            transition: transform 0.4s var(--ease-out-quart), border-color 0.4s;
        }
        .work-card:hover {
            transform: translateY(-10px);
            border-color: var(--border-hover);
        }
        .work-card__image {
            width: 100%;
            height: 300px;
            background-color: var(--bg-elevated);
            object-fit: cover;
        }
        .work-card__content {
            padding: 1.5rem;
        }
        .work-card__title {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
        }
        .work-card__description {
            color: var(--text-secondary);
        }
        .work-card--all {
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            font-family: var(--font-heading);
            font-size: 2rem;
            color: var(--text-primary);
            text-decoration: none;
        }
        .works__actions {
            display: flex;
            justify-content: center;
            margin-top: 2rem;
        }
        
        /* ---------------------------------- */
        /* 7. NUMBERS (Typography-driven) */
        /* ---------------------------------- */
        .numbers {
            padding: 5rem 0;
            overflow: hidden;
            position: relative;
        }
        .number-item {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            padding: 2rem 0;
            border-bottom: 1px solid var(--border-subtle);
        }
        .number-item--full {
            border-top: 1px solid var(--border-subtle);
        }
        .numbers-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
        }
        .number-item--half {
            border-right: 1px solid var(--border-subtle);
        }
        .number-item--half:last-child {
            border-right: none;
        }
        .number-item__value {
            font-family: var(--font-number);
            font-size: clamp(10rem, 25vw, 20rem);
            line-height: 0.8;
            color: var(--text-primary);
        }
        .number-item__label {
            font-family: var(--font-heading);
            font-weight: 400;
            color: var(--text-secondary);
            font-size: clamp(0.9rem, 1.5vw, 1.2rem);
            margin-left: 16px;
        }

        /* ---------------------------------- */
        /* 8. COLUMN (Asymmetric Grid) */
        /* ---------------------------------- */
        .column {
            padding: 10rem 5% 14rem;
        }
        .column__header {
            margin-bottom: 4rem;
        }
        .column__title {
            font-family: var(--font-heading);
            font-size: clamp(3rem, 7vw, 5rem);
        }
        .column__grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        .column-card {
            background-color: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            border-radius: 12px;
            overflow: hidden;
            transition: transform 0.4s var(--ease-out-quart), border-color 0.4s;
            display: flex;
            flex-direction: column;
        }
        .column-card:hover {
            transform: translateY(-10px);
            border-color: var(--border-hover);
        }
        .column-card--large {
            grid-column: span 2;
        }
        .column-card__thumb {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            filter: brightness(0.65) contrast(1.1) saturate(0.7);
            transition: transform 0.4s ease;
        }
        .column-card--large .column-card__thumb {
            aspect-ratio: 21 / 9;
        }
        .column-card:hover .column-card__thumb {
            transform: scale(1.05);
        }
        .column-card__body {
            padding: 1.5rem 2rem 2rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .column-card__date {
            font-family: var(--font-en);
            color: var(--text-muted);
            margin-bottom: 0.75rem;
            font-size: 0.85rem;
        }
        .column-card__title {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
            flex-grow: 1;
            line-height: 1.5;
        }
        .column-card--large .column-card__title {
            font-size: 1.75rem;
        }
        .column-card__excerpt {
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 0.95rem;
        }

        /* ---------------------------------- */
        /* 9. COMPANY (Light Section) */
        /* ---------------------------------- */
        .company {
            padding: 10rem 0;
            background-color: var(--bg-light);
            color: var(--text-on-light);
            clip-path: polygon(0 0, 100% 10%, 100% 100%, 0 100%);
            margin-top: -10vw;
        }
        .company__container {
            display: flex;
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            gap: 4rem;
        }
        .company__info {
            flex: 1;
        }
        .company__title {
            font-family: var(--font-heading);
            font-size: clamp(2rem, 5vw, 3.5rem);
            color: var(--text-on-light);
            margin-bottom: 3rem;
        }
        .company-table {
            width: 100%;
            border-collapse: collapse;
        }
        .company-table th, .company-table td {
            text-align: left;
            padding: 1.5rem 0;
            border-bottom: 1px solid #d1d5db;
        }
        .company-table th {
            font-weight: 700;
            width: 30%;
            color: var(--text-on-light);
        }
        .company-table td {
            color: var(--text-on-light-secondary);
        }
        .company__map {
            flex: 1;
            min-height: 400px;
            background-color: #e5e7eb;
            border-radius: 12px;
            overflow: hidden;
        }
        .company__map iframe {
            width: 100%;
            height: 100%;
            border: 0;
        }

        /* ---------------------------------- */
        /* 10. RECRUIT */
        /* ---------------------------------- */
        .recruit {
            position: relative;
            padding: 12rem 5%;
            background-image: url('../images/generated/sankou-engineer-control-panel-uniform.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            text-align: center;
        }
        .recruit::before {
            content: '';
            position: absolute;
            top: 0; left: 0;
            width: 100%; height: 100%;
            background-color: rgba(10, 14, 20, 0.6);
        }
        .recruit__content {
            position: relative;
            z-index: 2;
        }
        .recruit__title {
            font-family: var(--font-heading);
            font-size: clamp(2.5rem, 6vw, 4rem);
            font-weight: 600;
            margin-bottom: 1.5rem;
        }
        .recruit__text {
            font-size: 1.2rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 2.5rem auto;
            line-height: 1.8;
        }

        /* ---------------------------------- */
        /* 11. CTA STRIP */
        /* ---------------------------------- */
        .cta-strip {
            padding: 6rem 5%;
            text-align: center;
            background: linear-gradient(90deg, var(--accent-deep), var(--accent));
        }
        .cta-strip__title {
            font-family: var(--font-heading);
            font-size: clamp(2rem, 5vw, 3rem);
            margin-bottom: 1rem;
        }
        .cta-strip__text {
            color: var(--text-secondary);
            margin-bottom: 2rem;
        }
        .cta-strip__phone {
            font-family: var(--font-number);
            font-size: clamp(3rem, 8vw, 6rem);
            line-height: 1;
            letter-spacing: 0.05em;
        }
        
        /* ---------------------------------- */
        /* 12. FOOTER */
        /* ---------------------------------- */
        .site-footer {
            padding: 4rem 5%;
            background-color: var(--bg-void);
            text-align: center;
        }
        .site-footer__logo {
            font-family: var(--font-body);
            font-weight: 700;
            font-size: 1.5rem;
            margin-bottom: 2rem;
        }
        .site-footer__nav {
            margin-bottom: 3rem;
        }
        .site-footer__nav ul {
            display: flex;
            justify-content: center;
            gap: 2rem;
            list-style: none;
        }
        .site-footer__nav a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.3s;
        }
        .site-footer__nav a:hover {
            color: var(--text-primary);
        }
        .site-footer__copyright {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* ---------------------------------- */
        /* RESPONSIVE STYLES */
        /* ---------------------------------- */
        @media (max-width: 900px) {
            .header-nav, .header-cta { display: none; }
            .intro-strengths { flex-direction: column; }
            .intro-strengths__giant-text { width: 100%; font-size: 50vw; text-align: center; left: 0; height: 50vh; }
            .intro-strengths__content { width: 100%; padding: 0 5%; }
            .services__sticky-container { flex-direction: column; height: auto; }
            .services__image-wrapper { width: 100%; height: 60vh; position: sticky; top: 0; }
            .services__content-wrapper { width: 100%; }
            .service-item { height: auto; min-height: 60vh; padding: 5rem 10%; }
            .company__container { flex-direction: column; }
            .column__grid { grid-template-columns: 1fr; }
            .column-card--large { grid-column: span 1; }
            .process-flow__items { flex-direction: column; gap: 4rem; }
            .process-flow__line { left: 50%; top: 0; width: 2px; height: 100%; }
            .process-flow-item__number::after { bottom: 50%; left: -2rem; transform: translateY(50%); }
        }

        @media (max-width: 600px) {
            .site-header {
                padding: 1rem 5%;
                gap: 0.75rem;
                align-items: center;
            }
            .header-logo {
                font-size: 1.05rem;
                line-height: 1.2;
                display: flex;
                align-items: baseline;
                gap: 0.55rem;
                flex-wrap: wrap;
                flex: 1;
            }
            .header-logo span {
                margin-left: 0;
                font-size: 0.78em;
            }
            .header-menu-button {
                display: flex;
                flex: 0 0 auto;
            }
            .site-header.menu-open {
                background-color: rgba(10, 14, 20, 0.88);
                backdrop-filter: blur(12px);
            }
            .site-header.menu-open .header-nav {
                display: block;
                position: absolute;
                top: calc(100% + 0.5rem);
                left: 5%;
                right: 5%;
                padding: 1rem;
                border: 1px solid var(--border-subtle);
                border-radius: 8px;
                background: rgba(17,24,32,0.94);
                backdrop-filter: blur(14px);
            }
            .site-header.menu-open .header-nav ul {
                flex-direction: column;
                gap: 0.4rem;
            }
            .site-header.menu-open .header-nav a {
                display: block;
                padding: 0.8rem 0.5rem;
                color: var(--text-primary);
            }

            .hero {
                min-height: 100svh;
                padding: 6rem 5% 4rem;
                align-items: center;
            }
            .hero__label {
                font-size: 0.82rem;
                line-height: 1.7;
                max-width: 18rem;
                margin-bottom: 1.25rem;
            }
            .hero__title {
                font-size: clamp(1.9rem, 8.5vw, 2.15rem);
                line-height: 1.45;
                margin-bottom: 1.6rem;
            }
            .mobile-title-break {
                display: block;
            }
            .hero__subtitle {
                font-size: 0.98rem;
                line-height: 1.9;
                margin-bottom: 2rem;
            }
            .hero__cta {
                gap: 0.75rem;
            }
            .hero__cta .button {
                flex: 1 1 0;
                min-width: 0;
                padding: 0.9rem 0.8rem;
                text-align: center;
                font-size: 0.95rem;
            }

            .intro-strengths {
                min-height: auto;
                padding: 5rem 0 5.5rem;
                overflow: hidden;
            }
            .intro-strengths__giant-text {
                position: absolute;
                top: 0.5rem;
                left: 50%;
                width: auto;
                height: auto;
                transform: translateX(-50%);
                font-size: 42vw;
                opacity: 0.7;
                pointer-events: none;
            }
            .intro-strengths__content {
                position: relative;
                z-index: 1;
                padding: 7rem 5% 0;
            }
            .intro-strengths__title {
                font-size: clamp(1.9rem, 8vw, 2.15rem);
                line-height: 1.45;
                margin-bottom: 2.75rem;
            }
            .strength-card {
                margin-bottom: 2.4rem;
            }
            .strength-card__title {
                font-size: 1.55rem;
                line-height: 1.5;
            }
            .strength-card__text {
                padding-left: 30px;
                font-size: 0.98rem;
                line-height: 1.95;
            }

            .services {
                padding-top: 5.5rem;
            }
            .services__heading-wrapper {
                padding: 0 5% 2rem;
            }
            .services__main-title,
            .works__title,
            .column__title {
                font-size: clamp(2.25rem, 11vw, 3rem);
                line-height: 1.15;
            }
            .services__image-wrapper {
                height: 280px;
                position: relative;
                top: auto;
            }
            .service-item {
                min-height: auto;
                height: auto;
                padding: 3.5rem 5%;
            }
            .service-item__title,
            .service-item__text {
                opacity: 1 !important;
                transform: none !important;
            }
            .service-item__title {
                font-size: clamp(1.65rem, 8vw, 2rem);
                line-height: 1.35;
                margin-bottom: 1.25rem;
            }
            .service-item__text {
                font-size: 0.98rem;
                line-height: 1.95;
            }

            .process-flow {
                padding: 5.5rem 0;
            }
            .process-flow__items {
                gap: 2.75rem;
                padding: 0;
            }
            .process-flow__items::before {
                top: 0;
                bottom: 0;
                left: 50%;
                right: auto;
                width: 2px;
                height: 100%;
                transform: translateX(-50%);
            }
            .process-flow__line-progress {
                display: block;
                top: 0;
                left: 50%;
                width: 2px;
                height: 0;
                max-width: none;
                transform: translateX(-50%);
            }
            .process-flow-item {
                gap: 0.85rem;
            }
            .process-flow-item__node {
                width: 56px;
                height: 56px;
                font-size: 1rem;
            }
            .process-flow-item__title {
                font-size: 1.05rem;
            }

            .works {
                padding: 6rem 0;
            }
            .works__header {
                margin-bottom: 2rem;
            }
            .works__gallery {
                padding: 1rem 5% 2rem;
                gap: 1rem;
            }
            .work-card {
                flex-basis: 84vw;
                border-radius: 8px;
            }
            .work-card__image {
                height: 210px;
            }
            .work-card__title {
                font-size: 1.35rem;
                line-height: 1.45;
            }

            .numbers {
                padding: 3rem 0;
            }
            .numbers-row {
                grid-template-columns: 1fr;
            }
            .number-item--half {
                border-right: none;
            }
            .number-item__value {
                font-size: clamp(6rem, 30vw, 8rem);
            }

            .column {
                padding: 6rem 5% 8rem;
            }
            .column__header {
                margin-bottom: 2rem;
            }
            .column-card__body {
                padding: 1.25rem 1.25rem 1.6rem;
            }
            .column-card__title,
            .column-card--large .column-card__title {
                font-size: 1.25rem;
            }

            .company {
                padding: 7rem 0 5rem;
                clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 100%);
                margin-top: -4vw;
            }
            .company__container {
                gap: 2rem;
            }
            .company-table th,
            .company-table td {
                display: block;
                width: 100%;
                padding: 0.35rem 0;
            }
            .company-table tr {
                display: block;
                padding: 1rem 0;
                border-bottom: 1px solid #d1d5db;
            }
            .company-table th,
            .company-table td {
                border-bottom: none;
            }
            .company__map {
                min-height: 280px;
            }

            .recruit {
                padding: 8rem 5%;
                background-attachment: scroll;
            }
            .recruit__title {
                font-size: clamp(2rem, 10vw, 2.8rem);
            }
            .cta-strip {
                padding: 4.5rem 5%;
            }
            .cta-strip__text {
                color: rgba(255,255,255,0.82);
            }
            .site-footer__nav ul {
                flex-direction: column;
                gap: 1rem;
            }
        }

    

/* WordPress front-page shell adjustments */
body.sankou-home-page {
    margin: 0;
    background: var(--bg-void);
    font-size: 16px;
}
html:has(body.sankou-home-page) { font-size: 16px; }
body.admin-bar .site-header { top: 32px; }
@media (max-width: 782px) { body.admin-bar .site-header { top: 46px; } }
.sankou-home-page a { color: inherit; }
.sankou-home-page img { max-width: 100%; }

/* Reduced-motion / no-JS safety: never leave animated nodes stuck transparent. */
@media (prefers-reduced-motion: reduce) {
    .reveal,
    .service-item__title,
    .service-item__text,
    .hero__title .line-inner,
    .hero__label,
    .hero__subtitle,
    .hero__cta {
        opacity: 1 !important;
        transform: none !important;
    }
    .services__image[data-svc="1"] { opacity: 0.6; }
}