:root {
    --bg: #07111f;
    --bg-deep: #030913;
    --surface: rgba(11, 23, 39, 0.78);
    --surface-strong: rgba(15, 31, 51, 0.92);
    --surface-soft: rgba(255, 255, 255, 0.045);
    --line: rgba(202, 224, 255, 0.13);
    --line-strong: rgba(202, 224, 255, 0.24);
    --text: #f6f9fc;
    --text-soft: #c8d4e2;
    --text-muted: #8998aa;
    --blue: #4d8dff;
    --cyan: #34d6d3;
    --cyan-soft: rgba(52, 214, 211, 0.14);
    --light-bg: #f3f7fb;
    --light-surface: #ffffff;
    --light-surface-soft: #eaf1f7;
    --light-line: rgba(34, 61, 88, 0.16);
    --light-line-strong: rgba(34, 61, 88, 0.26);
    --light-text: #0b1726;
    --light-text-soft: #40546a;
    --light-text-muted: #697d91;
    --light-accent: #087477;
    --light-shadow: 0 24px 64px rgba(31, 59, 87, 0.12);
    --shadow: 0 24px 70px rgba(0, 13, 32, 0.28);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --container: 1180px;
    --header-height: 74px;
    --font-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text);
    background: var(--bg-deep);
    font-family: var(--font-sans);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body.menu-open {
    overflow: hidden;
}

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

img,
svg {
    display: block;
}

button,
input,
textarea {
    font: inherit;
}

button {
    cursor: pointer;
}

:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
}

.skip-link {
    position: fixed;
    left: 16px;
    top: 12px;
    z-index: 1000;
    transform: translateY(-140%);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    background: #ffffff;
    color: #06101d;
    font-weight: 700;
    transition: transform 180ms ease;
}

.skip-link:focus {
    transform: translateY(0);
}

.site-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    background:
        radial-gradient(circle at 70% -10%, rgba(77, 141, 255, 0.18), transparent 34rem),
        linear-gradient(180deg, #071323 0%, #050c16 54%, #030913 100%);
}

.site-bg__glow {
    position: absolute;
    border-radius: 999px;
    filter: blur(76px);
    opacity: 0.55;
}

.site-bg__glow--primary {
    width: 480px;
    height: 480px;
    right: 9vw;
    top: 95px;
    background: rgba(52, 214, 211, 0.14);
}

.site-bg__glow--secondary {
    width: 380px;
    height: 380px;
    left: 8vw;
    top: 290px;
    background: rgba(77, 141, 255, 0.12);
}

.site-bg__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(210, 232, 255, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(210, 232, 255, 0.045) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.76), rgba(0, 0, 0, 0.2) 55%, transparent);
}

.section-shell {
    width: min(calc(100% - 48px), var(--container));
    margin-inline: auto;
}

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--header-height);
    border-bottom: 1px solid rgba(202, 224, 255, 0.08);
    background: rgba(3, 9, 19, 0.76);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.site-header--scrolled {
    border-bottom-color: rgba(202, 224, 255, 0.16);
    background: rgba(3, 9, 19, 0.9);
}

.site-header__inner {
    width: min(calc(100% - 48px), var(--container));
    height: 100%;
    margin-inline: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}

.brand {
    display: inline-flex;
    align-items: center;
    min-width: 0;
    line-height: 0;
}

.brand__logo {
    display: block;
    width: clamp(132px, 13vw, 158px);
    height: auto;
    max-height: 40px;
    object-fit: contain;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

.site-nav__link {
    position: relative;
    color: var(--text-soft);
    font-size: 14px;
    line-height: 1;
    transition: color 180ms ease;
}

.site-nav__link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -10px;
    height: 2px;
    transform: scaleX(0);
    transform-origin: center;
    background: linear-gradient(90deg, var(--blue), var(--cyan));
    transition: transform 180ms ease;
}

.site-nav__link:hover,
.site-nav__link.active {
    color: var(--text);
}

.site-nav__link.active::after {
    transform: scaleX(1);
}

.site-nav__link--mobile-action {
    display: none;
}

.site-header__actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 18px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 700;
    line-height: 1;
    transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease, color 180ms ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn--primary {
    background: linear-gradient(135deg, #255fd1, #087477);
    color: #ffffff;
    box-shadow: 0 14px 34px rgba(52, 214, 211, 0.18);
}

.btn--light {
    background: #ffffff;
    color: #06101d;
}

.btn--light.active {
    box-shadow: inset 0 0 0 1px rgba(6, 16, 29, 0.08);
}

.btn--ghost {
    border-color: var(--line-strong);
    color: var(--text);
    background: rgba(255, 255, 255, 0.045);
}

.btn--ghost:hover {
    border-color: rgba(52, 214, 211, 0.36);
}

.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
}

.menu-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    margin: 4px auto;
    border-radius: 99px;
    background: currentColor;
    transition: transform 180ms ease, opacity 180ms ease;
}

body.menu-open .menu-toggle span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

body.menu-open .menu-toggle span:nth-child(2) {
    opacity: 0;
}

body.menu-open .menu-toggle span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}


.eyebrow {
    margin: 0 0 14px;
    color: var(--cyan);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}


.section-heading h1,
.section-heading h2 {
    margin: 0;
    max-width: 760px;
    color: var(--text);
    font-weight: 750;
    letter-spacing: -0.02em;
    text-wrap: balance;
}

.section-heading {
    max-width: 720px;
    margin-bottom: 42px;
}

.section-heading--center {
    margin-inline: auto;
    text-align: center;
}

.section-heading--split {
    max-width: none;
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.7fr);
    align-items: end;
    gap: 36px;
}

.section-heading--split > * {
    min-width: 0;
}

.section-heading h1,
.section-heading h2 {
    font-size: clamp(32px, 4vw, 48px);
    line-height: 1.14;
}

.section-heading p:not(.eyebrow) {
    margin: 16px 0 0;
    color: var(--text-soft);
    font-size: 16px;
    line-height: 1.8;
}

.service-card,
.value-card,
.culture-card,
.contact-info-card,
.contact-form-card,
.news-card {
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: var(--surface);
    box-shadow: 0 18px 56px rgba(0, 13, 32, 0.16);
}

.service-card h3,
.culture-card h3,
.tech-cell h3,
.news-card h3,
.contact-info-card h2,
.contact-form-card h2 {
    margin: 0;
    color: var(--text);
    font-size: 20px;
    line-height: 1.35;
    text-wrap: balance;
}

.service-card p,
.culture-card p,
.tech-cell p,
.news-card p,
.contact-info-card p,
.contact-form-card p {
    margin: 13px 0 0;
    color: var(--text-soft);
    line-height: 1.78;
}

.site-footer {
    border-top: 1px solid rgba(202, 224, 255, 0.1);
    background: rgba(1, 5, 12, 0.78);
}

.site-footer__inner {
    display: flex;
    justify-content: space-between;
    gap: 48px;
    padding-block: 48px;
}

.site-footer h2 {
    margin: 0;
    font-size: 18px;
}

.site-footer p {
    max-width: 520px;
    margin: 10px 0 0;
    color: var(--text-muted);
    line-height: 1.7;
}

.site-footer__meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
    color: var(--text-muted);
    font-size: 13px;
}

.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 520ms ease, transform 520ms ease;
}

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

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}


@media (max-width: 820px) {
    .site-header__inner {
        width: min(calc(100% - 32px), var(--container));
    }

    .menu-toggle {
        display: inline-block;
    }

    .site-header__actions .btn {
        display: none;
    }

    .site-nav {
        position: fixed;
        left: 16px;
        right: 16px;
        top: calc(var(--header-height) + 10px);
        max-height: calc(100dvh - var(--header-height) - 24px);
        overflow-y: auto;
        overscroll-behavior: contain;
        display: grid;
        gap: 0;
        padding: 10px;
        border: 1px solid var(--line);
        border-radius: var(--radius-md);
        background: rgba(3, 9, 19, 0.96);
        box-shadow: var(--shadow);
        transform: translateY(-12px);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
    }

    body.menu-open .site-nav {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .site-nav__link {
        padding: 15px 14px;
        border-radius: var(--radius-sm);
    }

    .site-nav__link--mobile-action {
        display: block;
    }

    .site-nav__link::after {
        display: none;
    }

    .site-nav__link:hover,
    .site-nav__link.active {
        background: rgba(255, 255, 255, 0.06);
    }
}


@media (max-width: 720px) {
    .section-shell {
        width: min(calc(100% - 32px), var(--container));
    }

    .section-heading,
    .section-heading--split {
        display: block;
        margin-bottom: 30px;
    }

    .site-footer__inner {
        flex-direction: column;
        gap: 24px;
    }

    .site-footer__meta {
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .brand__logo {
        width: 128px;
    }

    .btn {
        width: 100%;
    }
}