:root {
        --main: #06382f;
        --main-deep: #032c24;
        --main-soft: #0c4a3d;
        --accent: #d3a11c;
        --accent-soft: #f0d176;
        --text: #1e2d28;
        --muted: #5b6661;
        --white: #ffffff;
        --bg: #fbfbf8;
        --bg-soft: #f3f4f1;
        --line: rgba(7, 49, 40, 0.12);
        --shadow: 0 20px 40px rgba(7, 49, 40, 0.06);
        --body-font: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
        --heading-font: "Noto Serif JP", "Yu Mincho", serif;
      }

      *, *::before, *::after { box-sizing: border-box; }
      html { scroll-behavior: smooth; }
      body {
        margin: 0;
        font-family: var(--body-font);
        color: var(--text);
        background: var(--bg);
        line-height: 1.95;
        letter-spacing: 0.02em;
      }
      a { color: inherit; text-decoration: none; }
      img { max-width: 100%; display: block; }
      p, h1, h2, h3, dl, dd, dt { margin: 0; }
      .sr-only {
        position: absolute;
        width: 1px;
        height: 1px;
        padding: 0;
        margin: -1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
        white-space: nowrap;
        border: 0;
      }

      .container {
        width: min(1200px, calc(100% - 48px));
        margin: 0 auto;
      }
      .narrow { width: min(920px, 100%); }

      .hero {
        position: relative;
        min-height: 100svh;
        color: var(--white);
        overflow: hidden;
        background:
          radial-gradient(circle at 50% 40%, rgba(18, 123, 102, 0.18), transparent 34%),
          radial-gradient(circle at 50% 100%, rgba(211, 161, 28, 0.18), transparent 36%),
          linear-gradient(135deg, #022e26 0%, #06382f 46%, #01241d 100%);
      }
      .hero::before,
      .hero::after,
      .hero-waves {
        animation-timing-function: ease-in-out;
        animation-iteration-count: infinite;
        animation-direction: alternate;
      }
      .hero::before,
      .hero::after {
        background:
          radial-gradient(135% 95% at 50% 100%, transparent 58%, rgba(211, 161, 28, 0.22) 59%, transparent 60%),
          radial-gradient(112% 82% at 50% 100%, transparent 66%, rgba(140, 208, 190, 0.15) 67%, transparent 68%);
        opacity: 0.85;
        animation: waveGlow 11s ease-in-out infinite alternate;
      }
      .hero-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(to bottom, rgba(1, 20, 17, 0.12), rgba(1, 20, 17, 0.2));
      }
      .hero-waves {
        position: absolute;
        inset: 0;
        pointer-events: none;
        background:
          radial-gradient(70% 42% at 50% 100%, transparent 58%, rgba(255,255,255,0.08) 59%, transparent 60%),
          radial-gradient(88% 50% at 50% 100%, transparent 62%, rgba(255,255,255,0.06) 63%, transparent 64%),
          radial-gradient(110% 58% at 50% 100%, transparent 67%, rgba(240, 209, 118, 0.12) 68%, transparent 69%);
        opacity: 0.95;
        transform: translateY(0) scale(1);
        animation: waveFloat 7.5s ease-in-out infinite alternate;
      }
      .site-header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 20;
        transition: all 0.3s ease;
      }
      .site-header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 32px;
        padding: 16px 54px 16px 20px;
        background: rgba(255, 255, 255, 0.65);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-radius: 0 0 12px 12px;
        transition: all 0.3s ease;
      }

      .site-header.scrolled .site-header-inner {
        background: rgba(255,255,255,0.92);
        box-shadow: 0 6px 20px rgba(0,0,0,0.08);
      }
      .logo-link { display: inline-flex; align-items: center; }
      .site-logo {
        width: clamp(150px, 16vw, 150px);
        filter: drop-shadow(0 10px 24px rgba(0, 0, 0, 0.22));
      }
      .global-nav {
        display: flex;
        align-items: center;
        gap: clamp(22px, 2.3vw, 42px);
        font-size: 0.95rem;
        font-weight: 500;
      }
      .global-nav a {
        position: relative;
        color: #7e9b95;
        font-weight: 500;
      }
      .global-nav a::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: -8px;
        width: 100%;
        height: 1px;
        background: rgba(211, 161, 28, 0.86);
        transform: scaleX(0);
        transform-origin: left;
        transition: transform 0.35s ease;
      }
      .global-nav a:hover::after,
      .global-nav a:focus-visible::after { transform: scaleX(1); }

      .menu-toggle {
        display: none;
        width: 48px;
        height: 48px;
        border: 1px solid rgba(0,0,0,0.1);
        border-radius: 4px;
        background: rgba(107, 107, 107, 0.7);
        padding: 0;
        cursor: pointer;
      }
      .menu-toggle span {
        display: block;
        width: 20px;
        height: 2px;
        margin: 4px auto;
        background: #fff;
        transition: transform 0.3s ease, opacity 0.3s ease;
      }

      .hero-inner {
        position: relative;
        z-index: 1;
        min-height: 100svh;
        display: grid;
        place-items: center;
        text-align: center;
        padding: 160px 0 140px;
        animation: heroFadeUp 1.2s ease both;
      }
      .hero-inner > * { max-width: 980px; }
      .eyebrow {
        margin-bottom: 24px;
        font-size: 0.9rem;
        letter-spacing: 0.18em;
        color: var(--accent-soft);
      }
      .hero h1 {
        font-family: var(--heading-font);
        font-weight: 600;
        font-size: clamp(3rem, 7vw, 4.35rem);
        line-height: 1.24;
        letter-spacing: 0.04em;
        text-shadow: 0 14px 40px rgba(0, 0, 0, 0.22);
      }
      .lead {
        margin: 28px auto 44px;
        max-width: 760px;
        font-size: clamp(1rem, 1.4vw, 1.18rem);
        color: rgba(255, 255, 255, 0.9);
        padding: 0 15px;
      }
      .btn-primary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 18px;
        min-width: 210px;
        padding: 18px 36px;
        border-radius: 999px;
        border: 1px solid rgba(211, 161, 28, 0.95);
        color: #fff;
        font-weight: 500;
        letter-spacing: 0.08em;
        background: linear-gradient(135deg, rgba(211,161,28,0.18), rgba(211,161,28,0.05));
        box-shadow: 0 8px 20px rgba(0,0,0,0.2);
        backdrop-filter: blur(6px);
        transition: transform 0.35s ease, background 0.35s ease, box-shadow 0.35s ease;
      }
      .btn-primary::after {
        content: "›";
        font-size: 1.5rem;
        line-height: 1;
        color: var(--accent-soft);
        transition: transform 0.3s ease;
      }
      .btn-primary:hover {
        transform: translateY(-3px) scale(1.02);
        background: linear-gradient(135deg, rgba(211,161,28,0.35), rgba(211,161,28,0.1));
        box-shadow: 0 16px 32px rgba(0,0,0,0.28);
      }

      .btn-primary:hover::after {
        transform: translateX(4px);
      }

      .section {
        padding: 108px 0;
      }
      .section-accent { background: var(--bg-soft); }
      .section-heading,
      .about-section .narrow { text-align: center; }
      .section h2 {
        position: relative;
        display: block;
        text-align: center;
        font-family: var(--heading-font);
        font-size: clamp(2.25rem, 3vw, 3.25rem);
        color: var(--main);
        margin-bottom: 12px;
        letter-spacing: 0.08em;
      }
      .section h2::before {
        content: attr(data-en);
        display: block;
        font-size: 0.85rem;
        letter-spacing: 0.3em;
        color: var(--accent);
        margin-bottom: 12px;
        font-family: var(--body-font);
      }
        letter-spacing: 0.08em;
      }
      .section h2::after {
        content: "";
        display: block;
        width: 54px;
        height: 2px;
        margin: 18px auto 0;
        background: var(--accent);
      }
      .about-layout {
        display: grid;
        grid-template-columns: minmax(320px, 420px) minmax(0, 1fr);
        align-items: center;
        gap: 52px;
        margin-top: 18px;
      }
      .about-visual {
        position: relative;
        min-height: 420px;
        border-radius: 28px;
        overflow: hidden;
        background:
          linear-gradient(160deg, rgba(6, 56, 47, 0.96), rgba(3, 44, 36, 0.94)),
          radial-gradient(circle at 20% 20%, rgba(240, 209, 118, 0.22), transparent 30%),
          radial-gradient(circle at 80% 75%, rgba(255,255,255,0.08), transparent 24%);
        box-shadow: 0 24px 60px rgba(7, 49, 40, 0.14);
      }
      .about-visual::before {
        content: "";
        position: absolute;
        inset: 30px;
        border: 1px solid rgba(255,255,255,0.12);
        border-radius: 22px;
      }
      .about-visual::after {
        content: "";
        position: absolute;
        inset: 0;
        background:
          radial-gradient(circle at 28% 28%, rgba(240, 209, 118, 0.95) 0 6px, transparent 7px),
          radial-gradient(circle at 72% 28%, rgba(240, 209, 118, 0.95) 0 6px, transparent 7px),
          radial-gradient(circle at 50% 52%, rgba(255,255,255,0.95) 0 8px, transparent 9px),
          radial-gradient(circle at 28% 76%, rgba(240, 209, 118, 0.95) 0 6px, transparent 7px),
          radial-gradient(circle at 72% 76%, rgba(240, 209, 118, 0.95) 0 6px, transparent 7px),
          linear-gradient(rgba(255,255,255,0.16), rgba(255,255,255,0.16)) 50% 35% / 2px 26% no-repeat,
          linear-gradient(rgba(255,255,255,0.16), rgba(255,255,255,0.16)) 39% 64% / 23% 2px no-repeat,
          linear-gradient(rgba(255,255,255,0.16), rgba(255,255,255,0.16)) 61% 64% / 23% 2px no-repeat,
          linear-gradient(rgba(255,255,255,0.16), rgba(255,255,255,0.16)) 50% 64% / 2px 15% no-repeat;
        opacity: 0.9;
      }
      .about-visual-label {
        position: absolute;
        left: 34px;
        bottom: 30px;
        z-index: 1;
        padding: 14px 18px;
        border-radius: 16px;
        background: rgba(255,255,255,0.08);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border: 1px solid rgba(255,255,255,0.12);
        color: rgba(255,255,255,0.92);
      }
      .about-visual-label strong {
        display: block;
        margin-bottom: 4px;
        font-family: var(--heading-font);
        font-size: 1rem;
        letter-spacing: 0.08em;
      }
      .about-copy {
        text-align: left;
      }
      .about-copy .about-lead {
        max-width: none;
        color: var(--text);
        font-size: 1.04rem;
        text-align: left;
      }
      .about-copy .about-lead + .about-lead {
        margin-top: 18px;
      }
      .about-lead,
      .section-intro {
        max-width: 860px;
        margin: 0 auto;
        color: var(--muted);
        font-size: 1.02rem;
        text-align: center;
      }

      .card-grid {
        margin-top: 46px;
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 18px;
      }
      .company-card {
        position: relative;
        display: flex;
        flex-direction: column;
        gap: 16px;
        padding: 0;
        background: linear-gradient(180deg, rgba(255,255,255,1) 0%, rgba(252,251,247,1) 100%);
        border-radius: 18px;
        overflow: hidden;
        border: 1px solid rgba(7,49,40,0.08);
        box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;

        /* fade-in */
        opacity: 0;
        transform: translateY(20px);
        animation: cardFadeIn 0.8s ease forwards;
      }
      .company-card:nth-child(1){ animation-delay: 0.05s; }
      .company-card:nth-child(2){ animation-delay: 0.1s; }
      .company-card:nth-child(3){ animation-delay: 0.15s; }
      .company-card:nth-child(4){ animation-delay: 0.2s; }
      .company-card:nth-child(5){ animation-delay: 0.25s; }
      .company-card:nth-child(6){ animation-delay: 0.3s; }
      .company-card:nth-child(7){ animation-delay: 0.35s; }
      .company-card::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 4px;
        background: linear-gradient(90deg, rgba(211,161,28,0.95), rgba(240,209,118,0.6));
        z-index: 2;
      }
      .company-card::after {
        content: "→";
        position: absolute;
        right: 18px;
        bottom: 16px;
        font-size: 1rem;
        color: rgba(6,56,47,0.4);
        transition: transform 0.35s ease, color 0.35s ease;
      }
      .company-card:hover {
        transform: translateY(-6px);
        box-shadow: 0 18px 50px rgba(0,0,0,0.12);
        border-color: rgba(211,161,28,0.4);
      }
      .company-card:hover::after {
        transform: translateX(4px);
        color: rgba(6,56,47,0.9);
      }
      .company-card:hover {
        transform: translateY(-4px);
        border-color: rgba(211, 161, 28, 0.3);
        box-shadow: 0 24px 44px rgba(7, 49, 40, 0.08);
      }
      .card-icon {
        display: none;
      }
      .card-body {
        position: relative;
        padding: 20px 22px 34px;
      }
      .card-body h3 {
        font-family: var(--heading-font);
        font-size: 1.25rem;
        line-height: 1.6;
        color: var(--main);
        border-radius: 5px;
        margin-bottom: 12px;
        margin-top: 15px;
      }

      .card-image {
        width: 100%;
        height: 160px;
        object-fit: cover;
        display: block;
        transition: transform 0.5s ease, filter 0.5s ease;
        margin: 20px 0;
      }
      .company-card:hover .card-image {
        transform: scale(1.04);
        filter: saturate(1.05);
      }
      .card-body p {
        color: var(--muted);
        font-size: 0.96rem;
      }

      .profile-container { max-width: 980px; }
      .company-info {
        margin-top: 30px;
        border-top: 1px solid var(--line);
      }
      .company-info > div {
        display: grid;
        grid-template-columns: 180px 1fr;
        gap: 20px;
        padding: 22px 0;
        border-bottom: 1px solid var(--line);
      }
      .company-info dt {
        font-family: var(--heading-font);
        color: var(--main);
        font-weight: 600;
      }
      .company-info dd { color: var(--text); }

      .footer {
        background:
          radial-gradient(circle at 50% 0%, rgba(211, 161, 28, 0.08), transparent 38%),
          linear-gradient(135deg, #022b23 0%, #053b30 100%);
        color: rgba(255, 255, 255, 0.88);
        padding: 48px 0 34px;
      }
      .footer-inner {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 16px;
        text-align: center;
      }
      .footer-logo-image {
        width: clamp(160px, 18vw, 160px);
        filter: none;
      }
      .footer-contact {
        max-width: 560px;
      }
      .footer-title {
        margin-bottom: 6px;
        font-family: var(--heading-font);
        color: var(--accent-soft);
      }
      .copyright { font-size: 0.88rem; opacity: 0.85; }
      .pc-only { display: inline; }

      @keyframes heroFadeUp {
        from {
          opacity: 0;
          transform: translateY(18px);
        }
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      @keyframes waveFloat {
        from {
          transform: translateY(0) scale(1);
          opacity: 0.9;
        }
        to {
          transform: translateY(-10px) scale(1.03);
          opacity: 1;
        }
      }

      @keyframes glowDrift {
        from {
          transform: translate3d(0, 0, 0) scale(1);
          opacity: 0.72;
        }
        to {
          transform: translate3d(0, -8px, 0) scale(1.04);
          opacity: 0.96;
        }
      }

      @keyframes waveGlow {
        from {
          transform: translate3d(0, 0, 0) scale(1);
          opacity: 0.65;
        }
        to {
          transform: translate3d(0, -12px, 0) scale(1.05);
          opacity: 0.92;
        }
      }

      @keyframes cardFadeIn {
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }
        to {
          transform: translate3d(0, -12px, 0) scale(1.05);
          opacity: 0.92;
        }
      }

      @media (prefers-reduced-motion: reduce) {
        .hero::before,
        .hero::after,
        .hero-waves,
        .hero-inner,
        .btn-primary,
        .company-card {
          animation: none !important;
          transition: none !important;
          opacity: 1 !important;
          transform: none !important;
        }
      }
      }

      @media (max-width: 1024px) {
        .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      }

      @media (max-width: 920px) {
        .about-layout {
          grid-template-columns: 1fr;
          gap: 28px;
        }
        .about-visual {
          min-height: 320px;
        }
      }

      @media (max-width: 820px) {
        .container { width: min(100% - 32px, 1200px); }
        .site-header-inner { padding: 20px 30px; }
        .menu-toggle { display: inline-block; z-index: 12; }
        .global-nav {
          position: absolute;
          top: calc(100% + 10px);
          right: 16px;
          left: 16px;
          display: flex;
          flex-direction: column;
          align-items: flex-start;
          gap: 18px;
          padding: 24px;
          background: rgba(3, 35, 29, 0.96);
          border: 1px solid rgba(255, 255, 255, 0.08);
          opacity: 0;
          pointer-events: none;
          transform: translateY(-8px);
          transition: opacity 0.3s ease, transform 0.3s ease;
        }
        .global-nav.is-open {
          opacity: 1;
          pointer-events: auto;
          transform: translateY(0);
          border-radius: 10px;
        }
        .hero-inner {
          padding: 152px 0 110px;
        }
        .hero h1 { font-size: clamp(2.5rem, 9vw, 4rem); }
        .lead { font-size: 0.98rem; }
        .card-grid { grid-template-columns: 1fr; }
        .company-info > div { grid-template-columns: 1fr; gap: 8px; }
        .pc-only { display: none; }
      }

      @media (max-width: 540px) {
        .section { padding: 86px 0; }
        .hero::before,
        .hero::after { inset: auto -40% -18% -40%; height: 58%; }
        .site-logo { width: 142px; }
        .hero-inner { padding-top: 138px; }
        .btn-primary { min-width: 186px; padding: 16px 26px; }
        .card-body h3 { font-size: 1.2rem; }
      }