:root {
        --bg: #081827;
        --bg-soft: #0c2235;
        --panel: rgba(12, 34, 52, 0.78);
        --panel-border: rgba(150, 235, 233, 0.12);
        --text: #f7fbff;
        --muted: #b8c8da;
        --brand: #64ece6;
        --brand-deep: #2d8ca8;
        --line: rgba(255, 255, 255, 0.08);
        --shadow: 0 18px 48px rgba(0, 0, 0, 0.22);
        --radius-xl: 22px;
        --radius-lg: 18px;
        --radius-md: 14px;
        --max: 1120px;
      }

      * {
        box-sizing: border-box;
      }

      html {
        scroll-behavior: smooth;
      }

      body {
        margin: 0;
        min-width: 320px;
        font-family: "Archivo", sans-serif;
        color: var(--text);
        background:
          radial-gradient(circle at 8% 8%, rgba(100, 236, 230, 0.12), transparent 25%),
          radial-gradient(circle at 92% 28%, rgba(82, 140, 255, 0.08), transparent 22%),
          linear-gradient(135deg, #0d2b39 0%, #0b2235 38%, #081827 100%);
        overflow-x: hidden;
      }

      body::before,
      body::after {
        content: "";
        position: fixed;
        inset: auto;
        z-index: -1;
        pointer-events: none;
        filter: blur(24px);
      }

      body::before {
        top: 10vh;
        left: -8vw;
        width: 28vw;
        height: 28vw;
        background: rgba(100, 236, 230, 0.12);
        border-radius: 50%;
      }

      body::after {
        right: -10vw;
        bottom: 10vh;
        width: 30vw;
        height: 30vw;
        background: rgba(64, 111, 255, 0.14);
        border-radius: 50%;
      }

      a {
        color: inherit;
        text-decoration: none;
      }

      a:focus-visible {
        outline: 3px solid var(--brand);
        outline-offset: 4px;
      }

      img {
        display: block;
        max-width: 100%;
      }

      .shell {
        width: min(calc(100% - 32px), var(--max));
        margin: 0 auto;
      }

      .topbar {
        position: sticky;
        top: 0;
        z-index: 20;
        backdrop-filter: blur(18px);
        background: rgba(5, 18, 34, 0.52);
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      }

      .topbar-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 20px;
        padding: 13px 0;
      }

      .brand {
        display: flex;
        align-items: center;
        gap: 14px;
      }

      .brand-mark {
        width: 44px;
        height: 44px;
        border-radius: 12px;
        object-fit: cover;
        border: 1px solid rgba(255, 255, 255, 0.18);
        box-shadow: 0 10px 28px rgba(0, 0, 0, 0.22);
      }

      .brand-copy strong,
      .hero-copy h1,
      .section-heading h2,
      .cta-panel h2 {
        font-family: "Space Grotesk", sans-serif;
      }

      .brand-copy strong {
        display: block;
        font-size: 1rem;
        letter-spacing: 0.02em;
      }

      .brand-copy span {
        color: var(--muted);
        font-size: 0.92rem;
      }

      .nav {
        display: flex;
        align-items: center;
        gap: 24px;
      }

      .nav a:not(.button) {
        color: var(--muted);
        font-size: 0.9rem;
      }

      .button {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        padding: 12px 19px;
        border-radius: 999px;
        font-weight: 700;
        transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
      }

      .button:hover {
        transform: translateY(-2px);
      }

      .button-primary {
        color: #051521;
        background: linear-gradient(135deg, var(--brand), #8df6f2);
        box-shadow: 0 12px 28px rgba(100, 236, 230, 0.18);
      }

      .button-secondary {
        color: var(--text);
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid rgba(255, 255, 255, 0.12);
      }

      .hero {
        padding: 34px 0 24px;
      }

      .hero-grid {
        display: grid;
        grid-template-columns: minmax(0, 1.16fr) minmax(320px, 0.84fr);
        gap: 22px;
        align-items: start;
      }

      .hero-copy,
      .hero-visual,
      .glass,
      .cta-panel {
        position: relative;
        overflow: hidden;
        border-radius: var(--radius-xl);
        background: var(--panel);
        border: 1px solid var(--panel-border);
        box-shadow: var(--shadow);
        backdrop-filter: blur(18px);
      }

      .hero-copy {
        padding: 32px;
      }

      .eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 7px 11px;
        margin-bottom: 10px;
        border-radius: 999px;
        background: rgba(100, 236, 230, 0.11);
        color: #9ef6f1;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        font-size: 0.72rem;
        font-weight: 700;
      }

      .hero-copy h1 {
        margin: 8px 0 16px;
        font-size: clamp(2.45rem, 4.5vw, 4.4rem);
        line-height: 1;
        letter-spacing: -0.05em;
      }

      .hero-copy h1 span {
        color: var(--brand);
      }

      .hero-copy p {
        max-width: 58ch;
        color: var(--muted);
        font-size: 0.98rem;
        line-height: 1.65;
      }

      .hero-actions,
      .cta-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
        margin-top: 24px;
      }

      .hero-metrics {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 14px;
        margin-top: 24px;
      }

      .metric {
        padding: 15px;
        border-radius: 16px;
        background: rgba(255, 255, 255, 0.045);
        border: 1px solid rgba(255, 255, 255, 0.06);
      }

      .metric strong {
        display: block;
        font-size: 1.55rem;
        font-weight: 800;
      }

      .metric span {
        color: var(--muted);
        font-size: 0.84rem;
      }

      .hero-visual {
        height: 560px;
        padding: 20px;
        background:
          radial-gradient(circle at 20% 18%, rgba(100, 236, 230, 0.28), transparent 24%),
          linear-gradient(180deg, rgba(10, 34, 60, 0.9), rgba(8, 22, 41, 0.84)),
          var(--panel);
      }

      .hero-card {
        position: absolute;
        border-radius: 18px;
        overflow: hidden;
        border: 1px solid rgba(255, 255, 255, 0.12);
        background: rgba(255, 255, 255, 0.04);
        box-shadow: 0 20px 44px rgba(0, 0, 0, 0.28);
      }

      .hero-card img {
        width: 100%;
        height: 100%;
        object-fit: cover;
      }

      .hero-card-main {
        inset: 20px 20px auto;
        aspect-ratio: 1 / 1;
      }

      .hero-card-logo {
        background-image: url("logo-lutech-instagram-hd.jpg");
        background-position: center;
        background-repeat: no-repeat;
        background-size: contain;
      }

      .hero-card-float {
        right: 18px;
        bottom: 20px;
        width: 42%;
        aspect-ratio: 1 / 1;
      }

      .hero-badge {
        position: absolute;
        left: 20px;
        right: 20px;
        bottom: 20px;
        display: inline-flex;
        flex-direction: column;
        gap: 8px;
        padding: 15px 17px;
        border-radius: 17px;
        background: rgba(4, 15, 30, 0.82);
        border: 1px solid rgba(255, 255, 255, 0.1);
      }

      .hero-badge strong {
        font-size: 0.96rem;
      }

      .hero-badge span {
        color: var(--muted);
        max-width: 38ch;
        font-size: 0.9rem;
        line-height: 1.55;
      }

      main section {
        padding: 46px 0;
      }

      .section-heading {
        display: flex;
        align-items: end;
        justify-content: space-between;
        gap: 20px;
        margin-bottom: 24px;
      }

      .section-heading h2 {
        margin: 0;
        font-size: clamp(1.9rem, 2.8vw, 2.9rem);
        line-height: 1.02;
        letter-spacing: -0.04em;
      }

      .section-heading p {
        margin: 0;
        max-width: 52ch;
        color: var(--muted);
        line-height: 1.7;
      }

      .services-grid,
      .benefits-grid,
      .content-grid,
      .faq-grid {
        display: grid;
        gap: 16px;
      }

      .services-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
      }

      .benefits-grid,
      .faq-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }

      .content-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }

      .glass {
        padding: 21px;
      }

      .service-icon,
      .benefit-tag {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 48px;
        width: fit-content;
        padding: 10px 14px;
        border-radius: 12px;
        font-weight: 700;
        background: rgba(100, 236, 230, 0.12);
        color: var(--brand);
      }

      .glass h3 {
        margin: 18px 0 12px;
        font-size: 1.15rem;
      }

      .glass p,
      .faq-item p {
        margin: 0;
        color: var(--muted);
        line-height: 1.62;
      }

      .about-grid,
      .process-grid,
      .cta-grid,
      .footer-grid {
        display: grid;
        gap: 18px;
      }

      .about-grid {
        grid-template-columns: 1.15fr 0.85fr;
      }

      .process-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
      }

      .step {
        position: relative;
        padding-top: 64px;
      }

      .step-number {
        position: absolute;
        top: 22px;
        left: 24px;
        font-size: 0.88rem;
        color: var(--brand);
        letter-spacing: 0.08em;
        text-transform: uppercase;
        font-weight: 800;
      }

      .story-card {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 120px;
        gap: 20px;
        align-items: center;
      }

      .story-logo {
        width: 120px;
        aspect-ratio: 1 / 1;
        border-radius: 20px;
        object-fit: cover;
      }

      .highlights {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
        margin-top: 22px;
      }

      .pill {
        padding: 11px 16px;
        border-radius: 999px;
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.08);
        color: #d6e4f2;
        font-size: 0.95rem;
      }

      .visual-stack {
        display: grid;
        gap: 18px;
      }

      .photo-frame {
        overflow: hidden;
        border-radius: 28px;
        min-height: 280px;
        border: 1px solid rgba(255, 255, 255, 0.1);
      }

      .photo-frame img {
        width: 100%;
        height: 100%;
        object-fit: cover;
      }

      .note {
        display: flex;
        flex-direction: column;
        gap: 10px;
      }

      .note strong {
        font-size: 1.16rem;
      }

      .content-card {
        padding: 0;
        overflow: hidden;
      }

      .content-card img {
        width: 100%;
        aspect-ratio: 1 / 1;
        object-fit: cover;
      }

      .content-copy {
        padding: 22px;
      }

      .content-copy small {
        color: var(--brand);
        text-transform: uppercase;
        letter-spacing: 0.08em;
        font-weight: 800;
      }

      .content-copy h3 {
        margin: 14px 0 10px;
      }

      .faq-item {
        padding: 24px;
      }

      .faq-item h3 {
        margin: 0 0 12px;
        font-size: 1.12rem;
      }

      .cta-panel {
        padding: 30px;
      }

      .cta-grid {
        grid-template-columns: 1fr auto;
        align-items: end;
      }

      .cta-panel h2 {
        margin: 0 0 14px;
        font-size: clamp(2rem, 3vw, 3.5rem);
        line-height: 0.98;
        letter-spacing: -0.04em;
      }

      .cta-panel p {
        margin: 0;
        max-width: 52ch;
        color: var(--muted);
        line-height: 1.7;
      }

      footer {
        padding: 24px 0 42px;
      }

      .footer-grid {
        grid-template-columns: 1.2fr 1fr 1fr;
        align-items: start;
      }

      .footer-grid p,
      .footer-grid a {
        color: var(--muted);
        line-height: 1.7;
      }

      .footer-title {
        margin: 0 0 14px;
        font-size: 0.96rem;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: #dff9f7;
      }

      .reveal {
        opacity: 0;
        transform: translateY(26px);
        transition: opacity 700ms ease, transform 700ms ease;
      }

      .reveal.is-visible {
        opacity: 1;
        transform: translateY(0);
      }

      @media (max-width: 1080px) {
        .hero-grid,
        .about-grid,
        .cta-grid,
        .footer-grid,
        .services-grid,
        .benefits-grid,
        .content-grid,
        .faq-grid,
        .process-grid {
          grid-template-columns: repeat(2, minmax(0, 1fr));
        }

        .hero-visual {
          height: 500px;
        }

        .nav {
          display: none;
        }
      }

      @media (max-width: 760px) {
        .shell {
          width: min(calc(100% - 22px), var(--max));
        }

        .hero {
          padding-top: 26px;
        }

        .hero-grid,
        .about-grid,
        .cta-grid,
        .footer-grid,
        .services-grid,
        .benefits-grid,
        .content-grid,
        .faq-grid,
        .process-grid,
        .hero-metrics {
          grid-template-columns: 1fr;
        }

        .topbar-inner {
          padding: 14px 0;
        }

        .brand-mark {
          width: 46px;
          height: 46px;
        }

        .hero-copy,
        .hero-visual,
        .glass,
        .cta-panel {
          border-radius: 20px;
        }

        .hero-copy,
        .cta-panel,
        .glass {
          padding: 22px;
        }

        .hero-visual {
          height: 470px;
          padding: 18px;
        }

        .hero-card-main {
          inset: 18px 18px auto;
        }

        .hero-card-float {
          width: 48%;
          right: 12px;
          bottom: 14px;
        }

        .hero-badge {
          left: 18px;
          right: 18px;
          bottom: 18px;
        }

        .story-card {
          grid-template-columns: 1fr;
        }

        .story-logo {
          width: 88px;
        }

        .section-heading {
          align-items: start;
          flex-direction: column;
        }
      }

      @media (max-width: 430px) {
        .brand-copy span {
          display: none;
        }

        .hero-copy h1 {
          font-size: clamp(2.25rem, 11vw, 3rem);
        }

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

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

        .hero-visual {
          height: 445px;
        }

        .hero-badge {
          padding: 13px 15px;
        }

        .hero-badge span {
          font-size: 0.84rem;
        }
      }

      @media (prefers-reduced-motion: reduce) {
        html { scroll-behavior: auto; }
        .button, .reveal { transition: none; }
        .button:hover { transform: none; }
      }