:root {
        --timeline-track: #cfdbed;
}

.company-timeline {
        position: relative;
        display: grid;
        gap: 34px;
        padding-left: 188px;
}

.company-timeline::before {
        content: "";
        position: absolute;
        top: 8px;
        bottom: 8px;
        left: 91px;
        width: 2px;
        background: linear-gradient(180deg, rgba(10,75,160,0.1) 0%, var(--timeline-track) 18%, var(--timeline-track) 82%, rgba(10,75,160,0.08) 100%);
}

.company-timeline-item {
        position: relative;
        display: grid;
        grid-template-columns: 140px minmax(0, 1fr);
        gap: 56px;
        align-items: start;
}

.company-timeline-item::before {
        content: "";
        position: absolute;
        left: -110px;
        top: 2px;
        width: 18px;
        height: 18px;
        border-radius: 50%;
        background: var(--white);
        border: 5px solid var(--accent);
        box-shadow: 0 0 0 8px rgba(30,160,255,0.12);
}

.company-timeline-year {
        position: relative;
        z-index: 1;
        padding-top: 0px;
        color: var(--primary);
        font-size: 22px;
        font-weight: bold;
        letter-spacing: -0.06em;
        text-transform: uppercase;
}

.company-timeline-content {
        padding: 0 0 8px;
}

.company-timeline-content h3 {
        margin: 0 0 14px;
        font-size: 28px;
        line-height: 1.15;
        color: var(--primary-dark);
        letter-spacing: -0.6px;
}

.company-timeline-content ul {
        margin: 0;
        padding: 0;
        list-style: none;
        display: grid;
        gap: 12px;
}

.company-timeline-content li {
        position: relative;
        padding-left: 20px;
        color: var(--muted);
        font-size: 16px;
}

.company-timeline-content li::before {
        content: "";
        position: absolute;
        left: 0;
        top: 10px;
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: var(--primary);
}

.timeline-sublist {
        margin-top: 14px;
        margin-left: 18px;
}

.timeline-sublist li::before {
        background: var(--accent);
}

.timeline-gallery {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 16px;
        margin-top: 24px;
}

.timeline-img-placeholder {
        aspect-ratio: 4 / 3;
        border-radius: 16px;
        border: 1px solid #d8e4f3;
        background:
        linear-gradient(180deg, rgba(4,31,73,0.04), rgba(4,31,73,0.1)),
        linear-gradient(135deg, #f8fbff 0%, #e7f0fc 100%);
        display: flex;
        align-items: flex-end;
        justify-content: flex-start;
        padding: 3px;
        color: #6d7f99;
        font-size: 13px;
        font-weight: bold;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        img {
            width: 100%;
            height: 100%;
            border-radius: 12px;
            object-fit: cover;
        }
}

:root {
    --bg: #f5f7fb;
    --white: #ffffff;
    --text: #0f172a;
    --muted: #5b6b84;
    --line: #d9e2ef;
    --primary: #0a4ba0;
    --primary-dark: #072e67;
    --primary-deep: #041f49;
    --accent: #1ea0ff;
    --soft: #eef5ff;
    --shadow: 0 18px 48px rgba(15, 23, 42, 0.08);
    --radius: 22px;
    --container: 1180px;
}

* { box-sizing: border-box; }
html {
    scroll-behavior: smooth;
    overflow-x: clip;
}
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.4;
    overflow-x: clip;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container {
    width: min(calc(100% - 40px), var(--container));
    margin: 0 auto;
}

.topbar {
    background: var(--primary-deep);
    color: rgba(255,255,255,0.9);
    font-size: 14px;
}

.topbar-inner {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
    padding: 10px 0;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255,255,255,0.95);
    border-bottom: 1px solid rgba(217, 226, 239, 0.95);
    backdrop-filter: blur(10px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 8px 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
}

.brand-mark {
    width: 140px;
    flex: 0 0 140px;
}

.brand-mark img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

.brand-text strong {
    display: block;
    font-size: 32px;
    line-height: 1;
    letter-spacing: -0.6px;
    color: var(--primary-dark);
}

.brand-text span {
    display: block;
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.34em;
    font-size: 12px;
    color: #6c90b9;
    font-weight: bold;
}

.nav {
    display: flex;
    gap: 28px;
    flex-wrap: wrap;
    justify-content: flex-end;
    color: var(--muted);
    font-size: 15px;
    transition: 0.3s ease;
}

.nav a:hover { color: var(--primary); }

.hero {
    position: relative;
    overflow: hidden;
    background:
    radial-gradient(circle at 15% 15%, rgba(30,160,255,0.16), transparent 22%),
    radial-gradient(circle at 85% 15%, rgba(10,75,160,0.16), transparent 26%),
    linear-gradient(135deg, #ffffff 0%, #f2f7ff 55%, #ebf3ff 100%);
}

.hero::before,
.hero::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}

.hero::before {
    width: 520px;
    height: 520px;
    right: -160px;
    top: -170px;
    background: rgba(10,75,160,0.07);
}

.hero::after {
    width: 320px;
    height: 320px;
    left: -120px;
    bottom: -120px;
    background: rgba(30,160,255,0.08);
}

.hero-inner {
    position: relative;
    display: grid;
    grid-template-columns: 1.02fr 0.98fr;
    gap: 44px;
    align-items: center;
    padding: 82px 0;
}

.eyebrow {
    display: inline-block;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--soft);
    color: var(--primary);
    font-size: 13px;
    font-weight: bold;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 18px;
}

h1 {
    margin: 0;
    max-width: 680px;
    font-size: 56px;
    line-height: 1.05;
    letter-spacing: -1.5px;
    color: var(--primary-deep);
}

.hero-copy p {
    margin: 22px 0 0;
    max-width: 680px;
    color: var(--muted);
    font-size: 18px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 22px;
    border-radius: 14px;
    font-weight: bold;
    font-size: 15px;
    border: 1px solid transparent;
    transition: 0.2s ease;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 16px 30px rgba(10,75,160,0.2);
}

.btn-primary:hover { background: #083e86; }

.btn-secondary {
    background: #fff;
    color: var(--primary-dark);
    border-color: var(--line);
}

.hero-visual {
    position: relative;
    min-height: 520px;
    border-radius: 30px;
    overflow: hidden;
    box-shadow: var(--shadow);
    background:
    linear-gradient(180deg, rgba(4,31,73,0.08), rgba(4,31,73,0.18)),
    url('./hero-fiber.jpg') center center / cover no-repeat,
    linear-gradient(135deg, #103773, #0a4ba0 55%, #1ea0ff 100%);
    border: 1px solid rgba(255,255,255,0.65);
}

.hero-visual::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
    linear-gradient(120deg, rgba(255,255,255,0.16) 10%, transparent 10%, transparent 48%, rgba(255,255,255,0.1) 48%, rgba(255,255,255,0.1) 50%, transparent 50%),
    radial-gradient(circle at 18% 20%, rgba(255,255,255,0.36) 0 2px, transparent 3px),
    radial-gradient(circle at 36% 30%, rgba(255,255,255,0.34) 0 2px, transparent 3px),
    radial-gradient(circle at 62% 40%, rgba(255,255,255,0.34) 0 2px, transparent 3px),
    radial-gradient(circle at 78% 24%, rgba(255,255,255,0.34) 0 2px, transparent 3px),
    radial-gradient(circle at 72% 72%, rgba(255,255,255,0.34) 0 2px, transparent 3px),
    radial-gradient(circle at 30% 74%, rgba(255,255,255,0.34) 0 2px, transparent 3px),
    radial-gradient(circle at 52% 58%, rgba(255,255,255,0.34) 0 2px, transparent 3px);
    opacity: 0.85;
}

.hero-badge {
    position: absolute;
    left: 24px;
    right: 24px;
    bottom: 24px;
    padding: 24px;
    border-radius: 22px;
    background: rgba(4,31,73,0.78);
    backdrop-filter: blur(6px);
    color: #fff;
}

.hero-badge h3 {
    margin: 0 0 12px;
    font-size: 24px;
}

.hero-badge ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 8px;
    color: rgba(255,255,255,0.88);
    font-size: 15px;
}

section { padding: 84px 0; }

.section-head {
    max-width: 760px;
    margin-bottom: 38px;
}

.kicker {
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-size: 13px;
    font-weight: bold;
    margin-bottom: 12px;
}

.section-head h2 {
    margin: 0 0 14px;
    font-size: 40px;
    line-height: 1.12;
    color: var(--primary-dark);
    letter-spacing: -0.8px;
}

.section-head p {
    margin: 0;
    color: var(--muted);
    font-size: 17px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.service-card,
.about-text,
.about-meta,
.timeline-card,
.ref-card,
.gallery-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.service-card { padding: 28px; }

.service-icon {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    background: var(--soft);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 22px;
    margin-bottom: 18px;
}

.service-card h3,
.timeline-card h3,
.ref-card h3 {
    margin: 0 0 10px;
    font-size: 22px;
    color: var(--primary-dark);
}

.service-card p,
.timeline-card p,
.ref-card p,
.about-text p,
.about-meta p {
    margin: 0;
    color: var(--muted);
    font-size: 15px;
}

.about-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}

.about-text,
.about-meta { padding: 36px; }

.about-text p + p { margin-top: 16px; }

.meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-top: 18px;
    margin-bottom: 80px;
}

.meta-item {
    background: #f8fbff;
    border: 1px solid #e2ebf7;
    border-radius: 18px;
    padding: 18px;
}

.meta-item small {
    display: block;
    color: #64748b;
    margin-bottom: 6px;
}

.meta-item strong {
    display: block;
    color: var(--primary-dark);
    font-size: 17px;
}

.timeline { display: grid; gap: 20px; }
.timeline-card { padding: 28px; }

.timeline-year {
    display: inline-block;
    margin-bottom: 12px;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--soft);
    color: var(--primary);
    font-size: 13px;
    font-weight: bold;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.references-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 40px;
    align-items: start;
}

.references-grid > * {
    min-width: 0;
}

.references-grid .ref-card {
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
}

.references-grid .ref-card h3 {
    margin-bottom: 20px;
}

.logo-slider {
    margin-top: 22px;
    overflow: hidden;
    position: relative;
    width: 100%;
    max-width: 100%;
    mask-image: linear-gradient(90deg, transparent 0, #000 8%, #000 92%, transparent 100%);
    -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 8%, #000 92%, transparent 100%);
}

.logo-slider-track {
    display: flex;
    align-items: flex-start;
    gap: 28px;
    width: max-content;
    animation: logo-marquee 28s linear infinite;
    will-change: transform;
}

.logo-slider:hover .logo-slider-track {
    animation-play-state: paused;
}

.logo-slide {
    min-width: 180px;
    max-width: 240px;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    text-align: center;
    .logo-image {
        object-fit: contain;
    }
}

.logo-mark,
.logo-image {
    width: 72px;
    height: 72px;
    flex: 0 0 72px;
    border-radius: 16px;

}

.logo-mark {
    background: linear-gradient(135deg, var(--primary-deep), var(--primary));
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    letter-spacing: 0.08em;
}

.logo-image {
    display: block;
    object-fit: cover;
    background: #fff;
    border: 0;
    padding: 0;
}

.logo-name {
    color: var(--primary-dark);
    font-size: 14px;
    font-weight: 700;
    line-height: 1.35;
}

@keyframes logo-marquee {
    from {
        transform: translateX(0);
    }
    to {
        transform: translateX(calc(-50% - 8px));
    }
}

.ref-list,
.strength-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.ref-list li,
.strength-list li {
    padding: 0 0 0 24px;
    color: var(--muted);
    border-bottom: 0;
}

.ref-list li:last-child,
.strength-list li:last-child { border-bottom: 0; }

.strength-list {
    display: grid;
    gap: 16px;
}

.strength-list li {
    position: relative;
    padding-left: 24px;
}

.strength-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent);
}

.gallery {
    background: linear-gradient(180deg, #f7faff 0%, #eef4ff 100%);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.gallery-card {
    overflow: hidden;
    background: #fff;
}

.gallery-media {
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: linear-gradient(135deg, #dfeafb, #c6dbfb);
}

.gallery-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.35s ease;
}

.gallery-card:hover .gallery-media img {
    transform: scale(1.04);
}

.gallery-body {
    padding: 18px;
}

.gallery-body h3 {
    margin: 0 0 6px;
    font-size: 18px;
    color: var(--primary-dark);
}

.gallery-body p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}

.gallery-note {
    margin-top: 18px;
    color: #6c7d96;
    font-size: 14px;
}

.contact-band {
    padding: 0;
    background: linear-gradient(135deg, var(--primary-deep), var(--primary-dark) 55%, #0a4ba0 100%);
    color: #fff;
}

.contact-inner {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 40px;
    padding: 72px 0;
}

.contact-band h2,
.contact-band h3 {
    margin: 0 0 14px;
    color: #fff;
}

.contact-band p {
    margin: 0 0 18px;
    color: rgba(255,255,255,0.84);
}

.contact-list,
.company-list {
    display: grid;
    gap: 14px;
    margin-top: 22px;
}

.contact-row,
.company-row {
    padding: 0 0 14px;
    border-bottom: 1px solid rgba(255,255,255,0.14);
}

.contact-row small,
.company-row small {
    display: block;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 12px;
    color: rgba(255,255,255,0.55);
}

.contact-row strong,
.contact-row a,
.company-row strong {
    color: #fff;
    font-size: 16px;
    font-weight: 400;
    word-break: break-word;
}

.site-footer {
    background: #031733;
    color: rgba(255,255,255,0.72);
    padding: 18px 0;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    font-size: 14px;
}

/* Mobile Toggle Button */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 100;
    position: relative;
    border-radius: 8px;
    transition: 0.2s;
}

.mobile-toggle:hover {
    background: var(--soft);
}

.mobile-toggle span,
.mobile-toggle span::before,
.mobile-toggle span::after {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--primary-dark);
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.mobile-toggle span::before,
.mobile-toggle span::after {
    content: "";
    position: absolute;
    left: 0;
}

.mobile-toggle span::before { top: -8px; }
.mobile-toggle span::after { bottom: -8px; }

/* Animation for active state */
.mobile-toggle.active span { background: transparent; }
.mobile-toggle.active span::before { transform: rotate(45deg); top: 0; }
.mobile-toggle.active span::after { transform: rotate(-45deg); bottom: 0; }

.menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(4, 31, 73, 0.3);
    backdrop-filter: blur(8px);
    z-index: 80;
    opacity: 0;
    visibility: hidden;
    transition: 0.4s;
}

.menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

@media (max-width: 1100px) {
    .hero-inner,
    .about-box,
    .references-grid,
    .contact-inner {
    grid-template-columns: 1fr;
    }

    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .gallery-grid { grid-template-columns: repeat(2, 1fr); }
    .company-timeline { padding-left: 150px; }
    .company-timeline::before { left: 73px; }
    .company-timeline-item {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 42px;
    }
    .company-timeline-item::before { left: -90px; }
    .timeline-gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .hero-visual { min-height: 420px; }
    h1 { font-size: 48px; }
}

@media (max-width: 760px) {
    .container { width: min(calc(100% - 28px), var(--container)); }
    .header-inner { 
    flex-direction: row; 
    align-items: center; 
    justify-content: space-between;
    padding: 14px 0;
    }
    
    .mobile-toggle { display: block; }
    
    .nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 85%;
    max-width: 320px;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    justify-content: flex-start;
    padding: 100px 32px;
    gap: 20px;
    box-shadow: -10px 0 40px rgba(0,0,0,0.1);
    transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 90;
    visibility: hidden;
    flex-wrap: nowrap;
    transform: translateX(100%);
    }

    .nav.active {
    visibility: visible;
    transform: translateX(0);
    }

    .nav a {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-dark);
    padding: 12px 0;
    border-bottom: 1px solid var(--soft);
    width: 100%;
    }
    
    body.menu-open {
    overflow: hidden;
    }

    .services-grid,
    .gallery-grid,
    .meta-grid { grid-template-columns: 1fr; }
    .logo-slider {
        mask-image: none;
        -webkit-mask-image: none;
        overflow: hidden;
        padding-bottom: 0;
    }
    .logo-slider-track {
        animation: logo-marquee 20s linear infinite;
        width: max-content;
    }
    .logo-slide {
        /* min-width: 110px; */
        max-width: 128px;
    }
    .logo-name { font-size: 13px; }
    .company-timeline {
        padding-left: 0;
        gap: 28px;
    }
    .company-timeline::before {
        left: 10px;
        top: 12px;
        bottom: 12px;
    }
    .company-timeline-item {
    grid-template-columns: 1fr;
    gap: 12px;
    padding-left: 36px;
    }
    .company-timeline-item::before {
    left: 0;
    top: 4px;
    width: 20px;
    height: 20px;
    }
    .company-timeline-year {
        padding-top: 3px;
        padding-left: 8px;
        font-size: 20px;
    }
    .company-timeline-content h3 { font-size: 24px; }
    .timeline-gallery { grid-template-columns: 1fr; }
    .hero-inner { padding: 58px 0; }
    .hero-visual { min-height: 360px; }
    h1 { font-size: 36px; }
    .section-head h2 { font-size: 30px; }
    .brand-mark { height: 56px; }
    .brand-text strong { font-size: 24px; }
    .contact-row strong,
    .contact-row a,
    .company-row strong { font-size: 17px; }
}

@media (prefers-reduced-motion: reduce) {
    .logo-slider {
        mask-image: none;
        -webkit-mask-image: none;
        overflow: visible;
    }

    .logo-slider-track {
    animation: none;
    width: 100%;
    flex-wrap: wrap;
    gap: 20px;
    transform: none;
    }

    .logo-slide {
    min-width: 120px;
    max-width: 140px;
    }
}