/* ========================================
   DroneSense AI - Main Stylesheet
   ======================================== */

/* --- CSS Variables --- */
:root {
    --clr-bg-primary: #0a0e17;
    --clr-bg-secondary: #0d1321;
    --clr-bg-card: #111827;
    --clr-bg-card-hover: #161e2e;
    --clr-border: rgba(255, 255, 255, 0.06);
    --clr-border-light: rgba(255, 255, 255, 0.1);
    --clr-text-primary: #ffffff;
    --clr-text-secondary: #94a3b8;
    --clr-text-muted: #64748b;
    --clr-accent: #00d4ff;
    --clr-accent-secondary: #0066ff;
    --clr-accent-glow: rgba(0, 212, 255, 0.15);
    --clr-gradient: linear-gradient(135deg, #00d4ff 0%, #0066ff 50%, #7c3aed 100%);
    --clr-gradient-subtle: linear-gradient(135deg, rgba(0, 212, 255, 0.08) 0%, rgba(0, 102, 255, 0.08) 100%);
    --clr-btn-gradient: linear-gradient(90deg, #5eb2ff 0%, #4d7cff 48%, #835cff 100%);
    --clr-danger: #ef4444;
    --clr-success: #10b981;
    --clr-warning: #f59e0b;
    --primary-2: var(--clr-accent);
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: var(--font-primary);
    --font-body: var(--font-primary);
    --font-weight-regular: 400;
    --font-weight-semibold: 600;
    --text-hero: 3.5rem;
    --text-page: 2.5rem;
    --text-section: 1.75rem;
    --text-card: 1.25rem;
    --text-body: 1rem;
    --text-ui: 0.875rem;
    --text-caption: 0.75rem;
    --text-stat: 3rem;
    --leading-hero: 1.08;
    --leading-page: 1.12;
    --leading-section: 1.2;
    --leading-card: 1.25;
    --leading-body: 1.5;
    --leading-ui: 1.4;
    --leading-caption: 1.35;
    --tracking-tight: -0.02em;
    --tracking-eyebrow: 0.08em;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --container-max: 1200px;
    --section-y: 88px;
    --section-y-sm: 56px;
    --section-header-gap: 40px;
    --header-height: 80px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 40px -5px rgba(0, 0, 0, 0.6);
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    font-size: var(--text-body);
    font-weight: var(--font-weight-regular);
    background-color: var(--clr-bg-primary);
    color: var(--clr-text-primary);
    line-height: var(--leading-body);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Gradient Text --- */
.gradient-text {
    background: var(--clr-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Buttons ---
   Two-level system, shared pill geometry:
   - .btn--primary  high-intent CTAs (Get A Quote, Send Inquiry)
   - .btn--ghost / .btn--outline  explore / continue (Explore Products, View More)
*/
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-primary);
    font-weight: var(--font-weight-semibold);
    font-size: 0.9375rem;
    letter-spacing: 0.01em;
    line-height: 1.2;
    padding: 11px 32px;
    min-height: 46px;
    border-radius: 9999px;
    cursor: pointer;
    text-transform: none;
    white-space: nowrap;
    border: 1px solid transparent;
    background: transparent;
    color: #fff;
    box-shadow: none;
    transition:
        background var(--transition-base),
        border-color var(--transition-base),
        color var(--transition-base),
        box-shadow var(--transition-base),
        transform var(--transition-base);
}

.btn:focus-visible {
    outline: 2px solid var(--clr-accent);
    outline-offset: 3px;
}

.btn--primary {
    background: var(--clr-btn-gradient);
    border-color: transparent;
    box-shadow:
        0 6px 22px rgba(77, 124, 255, 0.32),
        0 0 0 1px rgba(255, 255, 255, 0.08) inset;
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow:
        0 10px 28px rgba(131, 92, 255, 0.38),
        0 4px 16px rgba(94, 178, 255, 0.22);
}

.btn--outline,
.btn--ghost {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.34);
}

.btn--outline:hover,
.btn--ghost:hover {
    border-color: rgba(255, 255, 255, 0.72);
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

.btn--lg {
    padding: 14px 36px;
    min-height: 52px;
}

.btn--full {
    width: 100%;
}

.btn--nav {
    padding: 9px 22px;
    min-height: 40px;
    font-size: var(--text-ui);
}

/* --- Header / Navigation --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--clr-border);
    transition: all var(--transition-base);
}

.header.scrolled {
    background: rgba(10, 14, 23, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    height: var(--header-height);
}

.logo {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    line-height: 0;
}

.logo__img {
    display: block;
    height: 34px;
    width: auto;
    max-width: 168px;
    object-fit: contain;
}

.logo--footer .logo__img {
    height: 32px;
}

.nav {
    display: flex;
    align-items: center;
    flex: 1;
    justify-content: center;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: 20px;
    list-style: none;
    flex-wrap: nowrap;
}

.nav__link {
    font-size: var(--text-ui);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--tracking-eyebrow);
    color: var(--clr-text-secondary);
    position: relative;
    padding: 6px 0;
    white-space: nowrap;
    transition: color var(--transition-fast);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--clr-gradient);
    transition: width var(--transition-base);
    border-radius: 1px;
}

.nav__link:hover,
.nav__link.is-active,
.nav__link.active {
    color: #fff;
}

.nav__link:hover::after,
.nav__link.is-active::after,
.nav__link.active::after {
    width: 100%;
}

.header__actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 0;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    height: 2px;
    width: 100%;
    background: #fff;
    border-radius: 1px;
}

.mobile-nav {
    display: none;
    padding: 16px 24px 24px;
    border-top: 1px solid var(--clr-border);
    background: rgba(10, 14, 23, 0.98);
}

.mobile-nav ul {
    list-style: none;
    display: grid;
    gap: 14px;
}

.mobile-nav a {
    color: #fff;
    font-size: var(--text-body);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0;
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--clr-bg-primary);
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.hero__video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    background: #0a0e17;
}

.hero__particles {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    pointer-events: none;
    z-index: 1;
    opacity: 0.22;
}

.hero__inner {
    position: relative;
    z-index: 2;
}

.hero__accent {
    color: #fff;
    -webkit-text-fill-color: #fff;
}

.hero__desc {
    font-size: var(--text-body);
    color: var(--clr-text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: var(--leading-body);
}

.hero__content {
    position: relative;
    z-index: 2;
}

.hero__pretitle {
    font-size: var(--text-ui);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--tracking-eyebrow);
    color: var(--clr-accent);
    margin-bottom: 24px;
    opacity: 0.9;
}

.hero__title {
    font-size: var(--text-hero);
    font-weight: var(--font-weight-semibold);
    line-height: var(--leading-hero);
    margin-bottom: 24px;
    letter-spacing: var(--tracking-tight);
    color: #fff;
    -webkit-text-fill-color: #fff;
}

.hero__title-accent {
    color: #fff;
    -webkit-text-fill-color: #fff;
}

.hero__cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.hero__scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    font-size: var(--text-caption);
    letter-spacing: var(--tracking-eyebrow);
    color: var(--clr-text-muted);
    text-transform: uppercase;
}

.hero__scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(180deg, var(--clr-accent) 0%, transparent 100%);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0%, 100% { transform: scaleY(1); transform-origin: top; }
    50% { transform: scaleY(0.3); transform-origin: top; }
}

/* --- Stats Section --- */
.stats {
    padding: 80px 0;
    background: var(--clr-bg-secondary);
    border-top: 1px solid var(--clr-border);
    border-bottom: 1px solid var(--clr-border);
}

.stats__heading {
    text-align: center;
    font-size: var(--text-caption);
    letter-spacing: var(--tracking-eyebrow);
    font-weight: var(--font-weight-semibold);
    color: var(--clr-text-secondary);
    margin-bottom: 28px;
}

.stats__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.stats__item,
.stat {
    text-align: center;
    padding: 24px;
}

.stats__number,
.stat__value {
    font-size: var(--text-stat);
    font-weight: var(--font-weight-semibold);
    background: var(--clr-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stats__suffix {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    color: var(--clr-accent);
}

.stats__label,
.stat__label {
    font-size: var(--text-ui);
    color: var(--clr-text-secondary);
    margin-top: 12px;
    line-height: var(--leading-body);
}

.stat__label .stat__mark {
    vertical-align: super;
    font-size: 0.65em;
    line-height: 0;
    margin-left: 1px;
}

.stats__footnote {
    text-align: left;
    font-size: var(--text-caption);
    color: var(--clr-text-muted);
    margin-top: 40px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    display: grid;
    gap: 8px;
}

.stats__footnote p {
    line-height: 1.55;
}

.stats__footnote .stats__mark {
    vertical-align: super;
    font-size: 0.75em;
    line-height: 0;
    margin-right: 2px;
}

.stats__source {
    color: var(--clr-text-muted);
    margin-left: 6px;
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color var(--transition-fast);
}

.stats__source:hover {
    color: var(--clr-text-secondary);
}

/* --- Section rhythm --- */
.section {
    padding-block: var(--section-y);
}

/* --- Section Header --- */
.section-header {
    text-align: center;
    margin-bottom: var(--section-header-gap);
}

.section-header__tag,
.section-tag {
    display: inline-block;
    font-size: var(--text-caption);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--tracking-eyebrow);
    color: var(--clr-accent);
    padding: 8px 16px;
    border: 1px solid rgba(0, 212, 255, 0.25);
    border-radius: 50px;
    margin-bottom: 20px;
}

.section-header__title,
.section-title {
    font-size: var(--text-section);
    font-weight: var(--font-weight-semibold);
    margin-bottom: 16px;
    line-height: var(--leading-section);
    letter-spacing: var(--tracking-tight);
    overflow-wrap: break-word;
    word-break: normal;
    hyphens: none;
    max-width: 100%;
}

.section-header__desc,
.section-desc {
    font-size: var(--text-body);
    color: var(--clr-text-secondary);
    max-width: 560px;
    margin: 0 auto;
}

.about__intro .section-tag,
.about__intro .section-title,
.about__intro .section-desc {
    text-align: left;
}

.about__intro .section-desc {
    margin-left: 0;
    margin-bottom: 24px;
}

/* --- Services Section --- */
.services {
    padding: 120px 0;
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--clr-bg-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--clr-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

.service-card:hover {
    background: var(--clr-bg-card-hover);
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -12px rgba(0, 102, 255, 0.15);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card__icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: var(--clr-gradient-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--clr-accent);
    margin-bottom: 20px;
    transition: all var(--transition-base);
}

.service-card:hover .service-card__icon {
    background: var(--clr-gradient);
    color: #fff;
    box-shadow: 0 8px 24px rgba(0, 102, 255, 0.3);
}

.service-card h3 {
    font-size: var(--text-card);
    font-weight: var(--font-weight-semibold);
    margin-bottom: 12px;
}

.service-card p {
    font-size: var(--text-ui);
    color: var(--clr-text-secondary);
    line-height: var(--leading-body);
    margin-bottom: 20px;
    flex: 1 1 auto;
}

.service-card__link {
    font-size: var(--text-ui);
    font-weight: var(--font-weight-semibold);
    color: var(--clr-accent);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap var(--transition-fast);
}

.service-card__link:hover {
    gap: 10px;
    color: #fff;
}

/* --- Product tiles (list + home preview) --- */
.products-preview {
    padding: 120px 0;
}

.products-preview__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
}

.product-tile {
    display: flex;
    flex-direction: column;
    color: inherit;
    text-decoration: none;
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    background: var(--clr-bg-card);
    overflow: hidden;
    transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.product-tile[hidden] {
    display: none !important;
}

.product-tile:hover {
    border-color: rgba(0, 212, 255, 0.28);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -12px rgba(0, 102, 255, 0.15);
}

.product-tile__media {
    position: relative;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    background: #000;
}

.product-tile__media img,
.product-tile__video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    display: block;
    background: #000;
}

.product-tile__media img {
    transition: transform var(--transition-slow), opacity var(--transition-base);
}

.product-tile__video {
    position: absolute;
    inset: 0;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.product-tile__media.is-playing img {
    opacity: 0;
    transform: none;
}

.product-tile__media.is-playing .product-tile__video {
    opacity: 1;
}

.product-tile:hover .product-tile__media:not(.is-playing) img {
    transform: scale(1.04);
}

.product-tile__media--empty {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--clr-accent);
}

.product-tile__body {
    padding: 24px 24px 28px;
}

.product-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 28px;
    justify-content: center;
}

.product-filters__btn {
    appearance: none;
    border: 1px solid var(--clr-border);
    background: var(--clr-bg-card);
    color: var(--clr-text);
    font: inherit;
    font-size: var(--text-ui);
    letter-spacing: var(--tracking-eyebrow);
    text-transform: uppercase;
    padding: 0.55rem 1rem;
    border-radius: var(--radius-md, 8px);
    cursor: pointer;
    transition: border-color var(--transition-base), color var(--transition-base), background var(--transition-base);
}

.product-filters__btn:hover {
    border-color: rgba(0, 212, 255, 0.35);
    color: var(--clr-accent);
}

.product-filters__btn.is-active {
    border-color: var(--clr-accent);
    color: var(--clr-accent);
    background: rgba(0, 212, 255, 0.08);
}

.product-filters__empty {
    margin-top: 12px;
    color: var(--clr-text-muted, #8a93a3);
}

.product-tile__cats {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 12px;
    margin-bottom: 8px;
}

.product-tile__cat {
    font-size: var(--text-caption);
    letter-spacing: var(--tracking-eyebrow);
    text-transform: uppercase;
    color: var(--clr-accent);
    margin-bottom: 0;
}

.detail__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 12px;
    margin-bottom: 12px;
}

.detail__tags .section-tag {
    margin-bottom: 0;
}

.product-tile__title {
    font-size: var(--text-card);
    font-weight: var(--font-weight-semibold);
    margin-bottom: 10px;
}

.product-tile__desc {
    font-size: var(--text-ui);
    color: var(--clr-text-secondary);
    line-height: var(--leading-body);
    margin-bottom: 18px;
}

.product-tile__link {
    font-size: var(--text-ui);
    font-weight: var(--font-weight-semibold);
    color: var(--clr-accent);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.product-tile:hover .product-tile__link {
    gap: 10px;
    color: #fff;
}

.detail__figure,
.detail__media {
    position: relative;
    aspect-ratio: 1 / 1;
    width: 100%;
    max-width: 560px;
    margin: 28px 0 36px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--clr-border);
    background: #000;
}

.detail__media {
    cursor: pointer;
}

.detail__figure .detail__image,
.detail__media .detail__image,
.detail__video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
    object-position: center;
    background: #000;
}

.detail__video {
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.detail__media.is-playing .detail__image {
    opacity: 0;
}

.detail__media.is-playing .detail__video {
    opacity: 1;
}

.detail__media-open {
    position: absolute;
    right: 16px;
    bottom: 16px;
    z-index: 2;
    width: 48px;
    height: 48px;
    border: 0;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(8, 16, 32, 0.72);
    color: #fff;
    cursor: pointer;
    transition: background var(--transition-base), transform var(--transition-base);
}

.detail__media-open:hover,
.detail__media-open:focus-visible {
    background: rgba(0, 102, 255, 0.9);
    transform: scale(1.05);
    outline: none;
}

.video-lightbox {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.video-lightbox[hidden] {
    display: none !important;
}

.video-lightbox__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(4, 10, 20, 0.82);
    border: 0;
    cursor: pointer;
}

.video-lightbox__panel {
    position: relative;
    z-index: 1;
    width: min(960px, 100%);
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.45);
}

.video-lightbox__video {
    display: block;
    width: 100%;
    max-height: min(80vh, 720px);
    background: #000;
}

.video-lightbox__close {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 2;
    width: 40px;
    height: 40px;
    border: 0;
    border-radius: 50%;
    background: rgba(8, 16, 32, 0.72);
    color: #fff;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.video-lightbox__close:hover,
.video-lightbox__close:focus-visible {
    background: rgba(0, 102, 255, 0.9);
    outline: none;
}

body.has-video-lightbox {
    overflow: hidden;
}

.detail__media .detail__image {
    transition: opacity var(--transition-base);
}

/* Product showcase hover/lightbox video is intentional media, not decorative motion.
   Keep it available even when prefers-reduced-motion is enabled. */

/* --- About Section --- */
.about {
    padding: 120px 0;
    background: var(--clr-bg-secondary);
    position: relative;
    overflow: hidden;
}

.about__media {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.about__video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.about--preview .about__media::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(10, 14, 23, 0.82) 0%, rgba(10, 14, 23, 0.55) 45%, rgba(10, 14, 23, 0.25) 100%);
}

.about--preview .about__grid,
.about--preview .container {
    position: relative;
    z-index: 1;
}

/* Tag sits on a moving video: render it as a frosted solid chip instead of
   a transparent outlined pill, which flickers against bright frames. */
.about--preview .about__intro .section-tag {
    background: rgba(10, 14, 23, 0.62);
    border-color: rgba(0, 212, 255, 0.45);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    text-shadow: 0 1px 6px rgba(0, 0, 0, 0.6);
}

.about--preview .about__intro .section-title,
.about--preview .about__intro .section-desc {
    text-shadow: 0 2px 18px rgba(0, 0, 0, 0.45);
}

.about__bg-glow {
    position: absolute;
    top: -200px;
    right: -200px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 102, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.about__intro .about__para,
.about__para {
    color: var(--clr-text-secondary);
    font-size: var(--text-body);
    line-height: var(--leading-body);
    margin: 0 0 1rem;
}

.about__intro .about__para:last-child,
.about__para:last-child {
    margin-bottom: 0;
}

.about__content .section-header__tag {
    margin-bottom: 16px;
}

.about__content .section-header__title {
    text-align: left;
    margin-bottom: 24px;
}

.about__text {
    font-size: var(--text-body);
    color: var(--clr-text-secondary);
    line-height: var(--leading-body);
    margin-bottom: 16px;
}

.about__content .btn {
    margin-top: 16px;
}

.about__stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.about-stat {
    background: var(--clr-bg-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition-base);
}

.about-stat:hover {
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 16px 32px -8px rgba(0, 0, 0, 0.4);
}

.about-stat__number,
.about-stat__value {
    display: block;
    font-size: 2.5rem;
    font-weight: var(--font-weight-semibold);
    background: var(--clr-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.about-stat__label {
    font-size: var(--text-ui);
    color: var(--clr-text-muted);
    font-weight: var(--font-weight-regular);
}

/* --- About: Vision / Mission / Values --- */
.about-culture {
    background: var(--clr-bg-secondary);
}

.about-culture__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
}

.about-culture__item {
    padding: 4px 0 0;
    border-top: 2px solid rgba(0, 212, 255, 0.55);
}

.about-culture__label {
    font-size: var(--text-caption);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--tracking-eyebrow);
    text-transform: uppercase;
    color: var(--clr-accent);
    margin: 14px 0 10px;
}

.about-culture__text {
    font-size: var(--text-card);
    font-weight: var(--font-weight-semibold);
    line-height: var(--leading-card);
    color: #fff;
    margin: 0;
    text-transform: none;
    letter-spacing: 0;
}

/* --- Solutions Section --- */
.solutions {
    padding: 120px 0;
}

.solutions__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.solution-card {
    position: relative;
    background: var(--clr-bg-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
    aspect-ratio: 4 / 3;
    width: 100%;
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
}

.solution-card:hover,
.solution-card:focus-visible {
    border-color: rgba(0, 212, 255, 0.28);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -12px rgba(0, 102, 255, 0.12);
}

.solution-card__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.solution-card__bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform var(--transition-slow);
}

.solution-card:hover .solution-card__bg img,
.solution-card:focus-visible .solution-card__bg img {
    transform: scale(1.05);
}

.solution-card--media::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 1;
    background: rgba(8, 12, 22, 0.42);
    transition: background var(--transition-base);
    pointer-events: none;
}

.solution-card--media:hover::before,
.solution-card--media:focus-visible::before {
    background: rgba(8, 12, 22, 0.62);
}

.solution-card__body {
    position: relative;
    z-index: 2;
    padding: 28px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    flex: 1;
}

.solution-card__title {
    font-size: var(--text-card);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.04em;
    line-height: var(--leading-card);
    margin: 0;
    color: #fff;
    text-wrap: balance;
    min-height: calc(var(--text-card) * var(--leading-card) * 2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.solution-card__desc {
    font-size: var(--text-ui);
    color: rgba(255, 255, 255, 0.82);
    line-height: var(--leading-body);
    margin: 0;
    max-width: 28ch;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transform: translateY(8px);
    transition:
      opacity var(--transition-base),
      transform var(--transition-base),
      max-height var(--transition-base),
      margin-top var(--transition-base);
}

.solution-card:hover .solution-card__desc,
.solution-card:focus-visible .solution-card__desc {
    max-height: 4.2em;
    opacity: 1;
    margin-top: 10px;
    transform: translateY(0);
}

/* --- News Section --- */
.news {
    padding: 120px 0;
    background: var(--clr-bg-secondary);
}

.news__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.news-card {
    background: var(--clr-bg-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    transition: all var(--transition-base);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    min-height: 220px;
}

.news-card:hover {
    border-color: rgba(0, 212, 255, 0.2);
    background: var(--clr-bg-card-hover);
    transform: translateY(-2px);
}

.news-card__meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.news-card__date {
    font-size: var(--text-ui);
    font-weight: var(--font-weight-semibold);
    color: var(--clr-accent);
    letter-spacing: 0;
}

.news-card__date em {
    font-style: normal;
    color: var(--clr-text-muted);
    font-weight: var(--font-weight-regular);
    margin-left: 6px;
}

.news-card__cat,
.news-card__tag {
    display: inline-block;
    font-size: var(--text-caption);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--tracking-eyebrow);
    padding: 4px 10px;
    border-radius: 4px;
    background: rgba(0, 212, 255, 0.12);
    color: #38bdf8;
}

.news-card__title {
    font-size: var(--text-card);
    font-weight: var(--font-weight-semibold);
    line-height: var(--leading-card);
    margin: 0;
}

.news-card__excerpt {
    font-size: var(--text-ui);
    color: var(--clr-text-secondary);
    line-height: var(--leading-body);
    margin: 0;
    flex: 1;
}

.news-card__link {
    font-size: var(--text-ui);
    font-weight: var(--font-weight-semibold);
    color: var(--clr-accent);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: auto;
}

.news__action {
    text-align: center;
    margin-top: 48px;
}

/* --- Compliance Section --- */
.compliance {
    text-align: center;
}

.compliance .section-title,
.compliance .section-desc {
    margin-left: auto;
    margin-right: auto;
}

.compliance__badges {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.compliance-badge {
    text-align: center;
    padding: 36px 48px;
    background: var(--clr-bg-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    min-width: 180px;
}

.compliance-badge:hover {
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 16px 32px -8px rgba(0, 0, 0, 0.4);
}

.compliance-badge__icon {
    font-size: 2rem;
    color: var(--clr-accent);
    margin-bottom: 12px;
}

.compliance-badge__name {
    display: block;
    font-size: var(--text-card);
    font-weight: var(--font-weight-semibold);
    margin-bottom: 4px;
}

.compliance-badge__region {
    font-size: var(--text-caption);
    color: var(--clr-text-muted);
}

.compliance__note {
    text-align: center;
    font-size: var(--text-ui);
    color: var(--clr-text-muted);
    margin-top: 32px;
}

/* --- Contact Section --- */
.contact {
    padding: 120px 0;
    background: var(--clr-bg-secondary);
}

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact__info .section-header__tag {
    margin-bottom: 16px;
}

.contact__info .section-header__title {
    text-align: left;
    margin-bottom: 16px;
}

.contact__text {
    font-size: var(--text-body);
    color: var(--clr-text-secondary);
    line-height: var(--leading-body);
    margin-bottom: 32px;
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 32px;
}

.contact__details li {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact__icon-box {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: var(--clr-gradient-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--clr-accent);
    flex-shrink: 0;
}

.contact__label {
    display: block;
    font-size: var(--text-caption);
    color: var(--clr-text-muted);
    text-transform: uppercase;
    letter-spacing: var(--tracking-eyebrow);
    margin-bottom: 2px;
}

.contact__details a,
.contact__details span {
    font-size: var(--text-body);
    color: var(--clr-text-primary);
}

.contact__details a:hover {
    color: var(--clr-accent);
}

.contact__wechat {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact__wechat-box {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: var(--clr-bg-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-md);
    font-size: var(--text-ui);
    color: var(--clr-text-secondary);
    transition: all var(--transition-base);
    cursor: pointer;
}

.contact__wechat-box:hover {
    border-color: rgba(0, 212, 255, 0.2);
    color: #fff;
}

.contact__wechat-box i {
    font-size: 1.25rem;
    color: #07c160;
}

/* --- Contact Form --- */
.contact__form {
    background: var(--clr-bg-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-xl);
    padding: 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    position: relative;
    display: grid;
    gap: 8px;
    align-content: start;
}

.form-group--full {
    grid-column: 1 / -1;
}

.contact__form input,
.contact__form select,
.contact__form textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--clr-bg-primary);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: var(--text-body);
    color: #fff;
    transition: all var(--transition-fast);
    outline: none;
}

.contact__form input::placeholder,
.contact__form textarea::placeholder {
    color: var(--clr-text-muted);
}

.contact__form select {
    color: var(--clr-text-muted);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.contact__form select option {
    background: var(--clr-bg-card);
    color: #fff;
}

.contact__form input:focus,
.contact__form select:focus,
.contact__form textarea:focus {
    border-color: var(--clr-accent);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.contact__form textarea {
    resize: vertical;
    min-height: 120px;
}

.contact__form .btn--full {
    grid-column: 1 / -1;
    margin-top: 8px;
}

/* --- Footer --- */
.footer {
    background: var(--clr-bg-primary);
    border-top: 1px solid var(--clr-border);
    padding: 80px 0 32px;
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: var(--font-weight-semibold);
    font-size: var(--text-card);
    margin-bottom: 16px;
    color: #fff;
}

.footer__logo i {
    font-size: 1.5rem;
    background: var(--clr-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer__brand p {
    font-size: var(--text-ui);
    color: var(--clr-text-secondary);
    line-height: var(--leading-body);
    margin-bottom: 20px;
    max-width: 300px;
}

.footer__social {
    display: flex;
    gap: 12px;
}

.footer__social a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--clr-border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-ui);
    color: var(--clr-text-secondary);
    transition: all var(--transition-fast);
}

.footer__social a:hover {
    border-color: var(--clr-accent);
    color: var(--clr-accent);
    background: rgba(0, 212, 255, 0.1);
}

.footer__col {
    min-width: 0;
}

.footer__title {
    font-family: var(--font-primary);
    font-size: var(--text-ui);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0;
    line-height: var(--leading-ui);
    margin: 0 0 20px;
    color: var(--clr-text-primary);
    text-transform: none;
}

.footer__col ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer__col li,
.footer__col a,
.footer__col span {
    font-size: var(--text-ui);
    font-weight: var(--font-weight-regular);
    line-height: var(--leading-body);
    letter-spacing: 0;
    color: var(--clr-text-secondary);
    text-transform: none;
}

.footer__col a {
    display: inline-flex;
    align-items: flex-start;
    gap: 10px;
    transition: color var(--transition-fast);
}

.footer__col a:hover,
.footer__col a:hover span {
    color: var(--clr-accent);
}

.footer__contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.footer__contact i {
    width: 1em;
    margin-top: 0.2em;
    flex-shrink: 0;
    color: var(--clr-text-secondary);
}

.footer__bottom {
    padding-top: 32px;
    border-top: 1px solid var(--clr-border);
    font-size: var(--text-caption);
    color: var(--clr-text-muted);
}
.footer__bottom-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 8px 20px;
}
.footer__bottom-inner p { margin: 0; }
.footer__privacy-btn {
    appearance: none;
    background: none;
    border: 0;
    padding: 0;
    font: inherit;
    font-size: inherit;
    color: var(--clr-text-secondary);
    text-decoration: underline;
    text-underline-offset: 3px;
    cursor: pointer;
}
.footer__privacy-btn:hover,
.footer__privacy-btn:focus-visible {
    color: var(--clr-text-primary);
}
.footer__privacy-btn[hidden] { display: none !important; }

/* --- Reveal Animations ---
   Scoped under .js so that if JS fails or is disabled the content stays
   visible (no hidden text). .js is added by an inline script in <head>. */
.js .reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Inner pages need top offset so content clears the fixed header. */
body.sub { padding-top: var(--header-height); }

/* ---------- Inner page hero ---------- */
.page-hero {
  padding: 48px 0 32px;
  text-align: center;
  background:
    radial-gradient(900px 400px at 50% -10%, rgba(0, 212, 255, 0.14), transparent 70%),
    linear-gradient(180deg, #120a2e 0%, var(--clr-bg-primary) 100%);
}
.page-hero__title {
  font-size: var(--text-page);
  font-weight: var(--font-weight-semibold);
  margin: 0.35rem 0 0;
  line-height: var(--leading-page);
  letter-spacing: var(--tracking-tight);
  color: #fff;
}
.page-hero__desc {
  max-width: 640px;
  margin: 14px auto 0;
  color: rgba(255, 255, 255, 0.7);
  line-height: var(--leading-body);
  font-size: var(--text-body);
}

/* Tighter first section under page hero (avoid large empty band). */
body.sub .page-hero + .section {
  padding-top: var(--section-y-sm);
}

body.sub .section-header {
  margin-bottom: 36px;
}

body.sub .section-tag {
  margin-bottom: 12px;
}

/* Technology layer on Products */
.tech-layer {
  background: var(--clr-bg-secondary);
}

.section-footer { margin-top: 40px; text-align: center; }

/* ---------- Tech / resource cards ---------- */
.tech__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}
.tech-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 28px 24px;
}
.tech-card__title { font-size: var(--text-card); font-weight: var(--font-weight-semibold); margin-bottom: 8px; color: var(--primary-2); }
.tech-card__desc { color: rgba(255, 255, 255, 0.66); font-size: var(--text-ui); }

.resources__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.resource-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 32px 26px;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.resource-card:hover { transform: translateY(-6px); border-color: var(--primary-2); }
.resource-card__icon {
  width: 54px; height: 54px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: rgba(0, 212, 255, 0.12);
  color: var(--primary-2);
  font-size: 1.4rem;
  margin-bottom: 18px;
}
.resource-card__title { font-size: var(--text-card); font-weight: var(--font-weight-semibold); margin-bottom: 10px; }
.resource-card__desc { color: rgba(255, 255, 255, 0.66); font-size: var(--text-ui); margin-bottom: 18px; }
.resource-card__link { color: var(--primary-2); font-weight: 600; }
.resource-card__link i { margin-left: 6px; }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(120deg, rgba(124, 58, 237, 0.18), rgba(0, 212, 255, 0.12));
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-block: var(--section-y-sm);
}
.cta-band__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap;
}
.cta-band__title { font-size: var(--text-section); font-weight: var(--font-weight-semibold); margin: 0; line-height: var(--leading-section); letter-spacing: var(--tracking-tight); }

/* ---------- About preview + compliance ---------- */
.about--preview .about__intro { text-align: left; }
.compliance--preview { text-align: center; }
.compliance--preview .compliance__inner { max-width: 920px; margin: 0 auto; }
.compliance__badges {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 28px;
}
.badge {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-width: 120px;
    min-height: 96px;
    padding: 16px 18px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    font-weight: var(--font-weight-semibold);
    letter-spacing: var(--tracking-eyebrow);
}
.badge--logo {
    background: rgba(8, 12, 22, 0.55);
}
.badge__logo {
    display: block;
    width: auto;
    max-width: 110px;
    height: 48px;
    object-fit: contain;
}
.badge__name {
    color: #fff;
    font-size: var(--text-card);
}
.badge__region,
.badge em {
    font-style: normal;
    opacity: 0.65;
    font-size: var(--text-caption);
    letter-spacing: 0;
    font-weight: var(--font-weight-regular);
    text-align: center;
}
.compliance__note { color: rgba(255, 255, 255, 0.55); margin-top: 14px; font-size: var(--text-ui); }

/* ---------- Article (news / product / solution detail) ---------- */
.article { padding: 64px 0; }
.article__inner { max-width: 760px; }
.article__back { display: inline-flex; align-items: center; gap: 8px; color: var(--primary-2); font-weight: 600; margin-bottom: 24px; }
.article__meta { display: flex; gap: 14px; align-items: center; margin-bottom: 14px; }
.article__title { font-size: var(--text-page); line-height: var(--leading-page); letter-spacing: var(--tracking-tight); font-weight: var(--font-weight-semibold); margin-bottom: 12px; }
.article__para { color: rgba(255, 255, 255, 0.78); font-size: var(--text-body); line-height: var(--leading-body); margin-bottom: 18px; }
.article__footer { margin-top: 32px; }

.detail__tagline {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-body);
  margin-bottom: 24px;
  line-height: var(--leading-body);
}
.detail__subtitle {
  font-size: var(--text-card);
  margin: 32px 0 12px;
  font-weight: var(--font-weight-semibold);
}
.detail__list {
  margin: 0 0 18px 1.2rem;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.7;
  display: grid;
  gap: 8px;
}
.detail__specs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}
.detail__spec {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 14px 16px;
  display: grid;
  gap: 4px;
}
.detail__spec-label {
  font-size: var(--text-caption);
  text-transform: uppercase;
  letter-spacing: var(--tracking-eyebrow);
  color: rgba(255, 255, 255, 0.5);
}
.detail__spec-value { font-weight: 600; }
.detail__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}
.detail__chip {
  display: inline-flex;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 212, 255, 0.08);
  font-size: var(--text-ui);
  font-weight: var(--font-weight-semibold);
  transition: border-color 0.2s ease, background 0.2s ease;
}
.detail__chip:hover {
  border-color: rgba(0, 212, 255, 0.45);
  background: rgba(0, 212, 255, 0.16);
}
.service-card__cat {
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--primary-2);
  margin-bottom: 8px;
  font-weight: var(--font-weight-semibold);
}
.section-footer {
  margin-top: 32px;
  text-align: center;
}

/* ---------- Contact ---------- */
.contact__grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 48px;
  align-items: start;
}
.contact__info-title { font-size: var(--text-section); font-weight: var(--font-weight-semibold); letter-spacing: var(--tracking-tight); margin-bottom: 18px; }
.contact__list { list-style: none; display: grid; gap: 16px; }
.contact__list li { display: flex; align-items: center; gap: 12px; color: rgba(255, 255, 255, 0.8); }
.contact__list i { color: var(--primary-2); width: 20px; }
.contact__form {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: start;
}
.form-group label { font-weight: var(--font-weight-semibold); font-size: var(--text-ui); }
.form-group .req { color: #ff6b6b; }
.contact__form input,
.contact__form textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  font: inherit;
}
.contact__form input:focus,
.contact__form textarea:focus {
  outline: none;
  border-color: var(--primary-2);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.18);
}
.contact__form textarea { resize: vertical; }
.contact__submit {
  justify-self: start;
  margin-top: 4px;
  grid-column: 1 / -1;
}
.field-error { color: #ff8585; font-size: var(--text-caption); min-height: 1em; }
.form-message { font-size: var(--text-ui); min-height: 1.2em; }
.form-message.is-success { color: #4ade80; }
.form-message.is-error { color: #ff8585; }

/* ---------- Privacy toast (lightweight consent) ---------- */
.privacy-toast {
  position: fixed;
  left: 16px;
  bottom: 16px;
  z-index: 1200;
  width: min(380px, calc(100vw - 32px));
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "body close"
    "actions actions";
  gap: 10px 8px;
  padding: 14px 14px 12px;
  background: rgba(13, 19, 33, 0.92);
  border: 1px solid var(--clr-border-light);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: privacy-toast-in 0.28s ease-out;
}
.privacy-toast[hidden] { display: none !important; }
.privacy-toast__body { grid-area: body; min-width: 0; }
.privacy-toast__title {
  margin: 0 0 4px;
  font-size: var(--text-ui);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0;
  color: var(--clr-text-primary);
}
.privacy-toast__text {
  margin: 0;
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
  color: var(--clr-text-secondary);
}
.privacy-toast__actions {
  grid-area: actions;
  display: flex;
  gap: 8px;
}
.privacy-toast__btn {
  flex: 1;
  appearance: none;
  margin: 0;
  padding: 7px 10px;
  border-radius: 6px;
  font: inherit;
  font-size: var(--text-caption);
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}
.privacy-toast__btn--accept {
  border: 1px solid transparent;
  background: var(--clr-text-primary);
  color: var(--clr-bg-primary);
}
.privacy-toast__btn--accept:hover,
.privacy-toast__btn--accept:focus-visible {
  background: #e8eef7;
}
.privacy-toast__btn--reject {
  border: 1px solid var(--clr-border-light);
  background: transparent;
  color: var(--clr-text-primary);
}
.privacy-toast__btn--reject:hover,
.privacy-toast__btn--reject:focus-visible {
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.04);
}
.privacy-toast__close {
  grid-area: close;
  align-self: start;
  appearance: none;
  width: 24px;
  height: 24px;
  margin: -2px -2px 0 0;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--clr-text-muted);
  cursor: pointer;
}
.privacy-toast__close:hover,
.privacy-toast__close:focus-visible {
  color: var(--clr-text-primary);
  background: rgba(255, 255, 255, 0.06);
}
@keyframes privacy-toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  .privacy-toast { animation: none; }
  .btn,
  .btn:hover {
    transition: none;
    transform: none;
  }
  .solution-card,
  .solution-card__bg img,
  .solution-card__desc {
    transition: none;
    transform: none;
  }
  .solution-card:hover .solution-card__desc,
  .solution-card:focus-visible .solution-card__desc {
    transform: none;
  }
}

/* ---------- 404 ---------- */
.notfound { padding: 140px 0; text-align: center; }
.notfound__code { font-size: 3.5rem; font-weight: var(--font-weight-semibold); color: var(--primary-2); margin: 0; }
.notfound__title { font-size: var(--text-page); font-weight: var(--font-weight-semibold); margin: 8px 0 12px; }
.notfound__desc { color: rgba(255, 255, 255, 0.7); margin-bottom: 24px; }

/* ---------- Accessibility helper ---------- */
.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;
}
.form-honeypot {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.resources-hub__intro { max-width: 640px; margin-bottom: 28px; color: var(--clr-text-secondary); }
.news-card__source {
  display: block;
  margin-top: 8px;
  font-size: var(--text-caption);
  color: var(--clr-text-muted);
}
.resources-section { margin-top: 8px; }
.resources-section .article__para { max-width: 720px; }
.faq-list { list-style: none; padding: 0; margin: 0; max-width: 760px; }
.faq-list li { margin-bottom: 22px; }
.faq-list h3 { font-size: var(--text-card); font-weight: var(--font-weight-semibold); margin: 0 0 6px; }
.faq-list p { margin: 0; color: rgba(255, 255, 255, 0.78); line-height: 1.65; }

@media (max-width: 768px) {
  .contact__grid { grid-template-columns: 1fr; gap: 28px; }
  .cta-band__inner { flex-direction: column; align-items: flex-start; }
}

/* --- Mobile Navigation --- */
@media (max-width: 1024px) {
    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solutions__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news__grid {
        grid-template-columns: 1fr;
    }
    
    .contact__grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .footer__grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }
    
    .about__grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .stats__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
        --section-y: 56px;
        --section-y-sm: 40px;
        --section-header-gap: 28px;
        --text-hero: 2.5rem;
        --text-page: 1.75rem;
        --text-section: 1.5rem;
        --text-stat: 2.25rem;
    }

    .nav {
        display: none;
    }

    .header__cta {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .mobile-nav:not([hidden]) {
        display: block;
    }

    .logo__img {
        height: 28px;
        max-width: min(140px, 48vw);
    }

    .hero__title {
        padding-inline: 4px;
    }

    .hero__cta {
        flex-direction: column;
        align-items: stretch;
        width: min(100%, 320px);
        margin-inline: auto;
    }

    .hero__cta .btn {
        width: 100%;
    }

    .stats__grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .services__grid {
        grid-template-columns: 1fr;
    }

    .products-preview__grid {
        grid-template-columns: 1fr;
    }

    .about-culture__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about__intro .section-tag,
    .about__intro .section-title,
    .about__intro .section-desc {
        text-align: center;
    }

    .about__intro .section-desc {
        margin-inline: auto;
    }

    .container {
        padding-left: 16px;
        padding-right: 16px;
    }

    .services__grid {
        grid-template-columns: 1fr;
    }

    .solutions__grid {
        grid-template-columns: 1fr;
    }

    .about__stats {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .stats__grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .stats__suffix {
        font-size: 1.25rem;
    }

    /* Mobile: certification strip — 3×2, no cards, logos only */
    .compliance__badges {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 12px 10px;
        align-items: center;
        justify-items: center;
        margin-top: 20px;
    }

    .compliance .badge,
    .compliance .badge--logo {
        min-width: 0;
        min-height: 0;
        width: 100%;
        padding: 6px 4px;
        gap: 0;
        border: none;
        background: transparent;
        border-radius: 0;
    }

    .compliance .badge__logo {
        height: 32px;
        max-width: 76px;
    }

    .compliance .badge__region,
    .compliance .badge__name {
        display: none;
    }

    .contact__form {
        grid-template-columns: 1fr;
        padding: 28px;
    }

    .footer__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .hero__cta {
        flex-direction: column;
    }

    .hero__cta .btn {
        width: 100%;
    }

    .news-card {
        flex-direction: column;
        gap: 16px;
    }

    .news-card__date {
        flex-direction: row;
        gap: 8px;
        align-items: baseline;
    }
}

/* --- Particle Canvas --- */
.particle {
    position: absolute;
    border-radius: 50%;
    background: var(--clr-accent);
    pointer-events: none;
    animation: float linear infinite;
}

@keyframes float {
    0% {
        transform: translateY(100vh) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-10vh) scale(1);
        opacity: 0;
    }
}