:root {
    color-scheme: light;
    --color-ink: #102a36;
    --color-muted: #536b75;
    --color-brand: #073b4c;
    --color-brand-strong: #042c39;
    --color-accent: #087f78;
    --color-accent-bright: #2ec4b6;
    --color-accent-soft: #dff7f4;
    --color-surface: #ffffff;
    --color-canvas: #f4f8f9;
    --color-line: #d6e2e6;
    --color-error: #b42318;
    --shadow-sm: 0 0.25rem 1rem rgba(7, 59, 76, 0.08);
    --shadow-lg: 0 1.5rem 4rem rgba(7, 59, 76, 0.13);
    --radius-sm: 0.5rem;
    --radius-md: 0.9rem;
    --radius-lg: 1.5rem;
    --space-1: 0.35rem;
    --space-2: 0.65rem;
    --space-3: 1rem;
    --space-4: 1.5rem;
    --space-5: 2rem;
    --space-6: 3rem;
    --space-7: 4.5rem;
    --container: 75rem;
    --reading-width: 47rem;
    --focus-ring: 0 0 0 0.2rem #ffffff, 0 0 0 0.42rem #087f78;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    font-size: 16px;
    line-height: 1.6;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    min-width: 20rem;
    scroll-behavior: smooth;
}

body {
    min-width: 20rem;
    margin: 0;
    overflow-x: hidden;
    color: var(--color-ink);
    background: var(--color-canvas);
    text-rendering: optimizeLegibility;
}

body,
button,
input,
select,
textarea {
    font: inherit;
}

textarea {
    resize: vertical;
}

.inquiry-panel {
    max-width: 58rem;
    margin-block: var(--space-6);
    padding: clamp(1.25rem, 4vw, 2.5rem);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    background: #fff;
    box-shadow: var(--shadow-sm);
}

.inquiry-form,
.inquiry-form__grid {
    display: grid;
    gap: var(--space-4);
}

.inquiry-form__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.inquiry-form__wide {
    grid-column: 1 / -1;
}

.field-hint {
    color: var(--color-muted);
    font-size: 0.85rem;
}

.checkbox-field {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: start;
}

.checkbox-field input {
    width: 1.2rem;
    min-height: 1.2rem;
    margin-top: 0.15rem;
}

.checkbox-field .field-error {
    grid-column: 2;
}

.form-trap {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.success-message {
    margin-block: var(--space-3);
    padding: var(--space-3);
    border-left: 0.3rem solid var(--color-accent);
    background: #eaf8f5;
    font-weight: 700;
}

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

a {
    color: var(--color-accent);
    text-underline-offset: 0.2em;
}

a:hover {
    color: var(--color-brand);
}

:focus-visible {
    outline: 0;
    box-shadow: var(--focus-ring);
}

h1,
h2,
h3,
p {
    overflow-wrap: anywhere;
}

h1,
h2,
h3 {
    margin-block: 0 0.65em;
    color: var(--color-brand);
    font-weight: 720;
    line-height: 1.16;
    letter-spacing: -0.025em;
}

h1 {
    max-width: 20ch;
    font-size: clamp(2.15rem, 7vw, 4.6rem);
}

h2 {
    font-size: clamp(1.55rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.15rem, 2.5vw, 1.45rem);
}

p {
    margin-block: 0 1rem;
}

ul,
ol {
    padding-inline-start: 1.25rem;
}

.container {
    width: min(100% - 2rem, var(--container));
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    z-index: 1000;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.65rem 1rem;
    border-radius: var(--radius-sm);
    color: #fff;
    background: var(--color-brand);
    transform: translateY(-200%);
}

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

.masthead {
    position: sticky;
    z-index: 100;
    top: 0;
    box-shadow: 0 1px 0 rgba(7, 59, 76, 0.08);
}

.utility-bar {
    color: #d9eeef;
    background: var(--color-brand-strong);
}

.utility-bar__inner {
    display: flex;
    min-height: 2.25rem;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    font-size: 0.82rem;
}

.utility-bar p {
    margin: 0;
}

.language-link {
    color: #fff;
    font-weight: 700;
    text-decoration: none;
}

.language-link:hover {
    color: var(--color-accent-bright);
}

.site-header {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(0.8rem);
}

.site-header__inner {
    position: relative;
    display: flex;
    min-height: 4.75rem;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.brand {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 0.7rem;
    color: var(--color-brand);
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.035em;
    text-decoration: none;
}

.brand img {
    width: 2.75rem;
    height: 2.75rem;
}

.primary-nav {
    display: flex;
    align-items: center;
    gap: clamp(0.55rem, 1.5vw, 1.35rem);
}

.primary-nav > a:not(.button) {
    position: relative;
    padding-block: 0.7rem;
    color: var(--color-ink);
    font-size: 0.92rem;
    font-weight: 650;
    text-decoration: none;
    white-space: nowrap;
}

.primary-nav > a:not(.button)::after {
    position: absolute;
    right: 0;
    bottom: 0.35rem;
    left: 0;
    height: 0.12rem;
    background: var(--color-accent);
    content: "";
    transform: scaleX(0);
    transition: transform 160ms ease;
}

.primary-nav > a:hover::after,
.primary-nav > a:focus-visible::after {
    transform: scaleX(1);
}

.nav-toggle {
    display: none;
    align-items: center;
    gap: 0.55rem;
    min-height: 2.75rem;
    padding: 0.45rem 0.7rem;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-sm);
    color: var(--color-brand);
    background: #fff;
    font-size: 0.78rem;
    font-weight: 700;
}

.nav-toggle__icon,
.nav-toggle__icon::before,
.nav-toggle__icon::after {
    display: block;
    width: 1.25rem;
    height: 0.13rem;
    border-radius: 1rem;
    background: currentColor;
    content: "";
}

.nav-toggle__icon {
    position: relative;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
    position: absolute;
    left: 0;
}

.nav-toggle__icon::before {
    top: -0.38rem;
}

.nav-toggle__icon::after {
    top: 0.38rem;
}

.button {
    display: inline-flex;
    min-height: 3rem;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1.15rem;
    border: 0;
    border-radius: var(--radius-sm);
    color: #fff;
    background: var(--color-accent);
    box-shadow: 0 0.35rem 1rem rgba(8, 127, 120, 0.18);
    font-weight: 750;
    text-align: center;
    text-decoration: none;
}

.button:hover {
    color: #fff;
    background: var(--color-brand);
}

.button--small {
    min-height: 2.55rem;
    padding: 0.45rem 0.85rem;
    font-size: 0.88rem;
}

.site-main {
    min-height: 68vh;
    padding-block: clamp(2rem, 5vw, 4rem) var(--space-7);
}

.hero {
    position: relative;
    display: grid;
    overflow: hidden;
    min-height: 31rem;
    align-items: center;
    grid-template-columns: minmax(0, 1.1fr) minmax(18rem, 0.9fr);
    gap: clamp(2rem, 6vw, 6rem);
    padding: clamp(2rem, 5vw, 5rem);
    border-radius: var(--radius-lg);
    color: #dff4f4;
    background:
        radial-gradient(circle at 85% 12%, rgba(46, 196, 182, 0.25), transparent 32%),
        linear-gradient(135deg, var(--color-brand-strong), var(--color-brand));
    box-shadow: var(--shadow-lg);
}

.hero::before {
    position: absolute;
    inset: auto -7rem -10rem auto;
    width: 24rem;
    height: 24rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    content: "";
}

.hero h1 {
    color: #fff;
}

.hero__copy {
    position: relative;
    z-index: 1;
}

.hero__copy > p:not(.eyebrow) {
    max-width: 40rem;
    font-size: clamp(1rem, 2vw, 1.2rem);
}

.eyebrow {
    margin-bottom: 0.75rem;
    color: var(--color-accent);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.hero .eyebrow {
    color: var(--color-accent-bright);
}

.hero-visual {
    position: relative;
    width: min(100%, 24rem);
    aspect-ratio: 1;
    justify-self: center;
}

.hero-visual__orbit {
    position: absolute;
    inset: 7%;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 50%;
}

.hero-visual__orbit::before,
.hero-visual__orbit::after {
    position: absolute;
    border-radius: 50%;
    background: var(--color-accent-bright);
    box-shadow: 0 0 1.5rem rgba(46, 196, 182, 0.65);
    content: "";
}

.hero-visual__orbit::before {
    top: 8%;
    left: 18%;
    width: 1rem;
    height: 1rem;
}

.hero-visual__orbit::after {
    right: 4%;
    bottom: 22%;
    width: 0.7rem;
    height: 0.7rem;
}

.hero-visual__tube {
    position: absolute;
    z-index: 2;
    top: 19%;
    left: 35%;
    width: 30%;
    height: 61%;
    border: 0.35rem solid rgba(255, 255, 255, 0.92);
    border-top-width: 1.2rem;
    border-radius: 0.65rem 0.65rem 3rem 3rem;
    background: linear-gradient(to bottom, transparent 42%, rgba(46, 196, 182, 0.72) 43%);
    box-shadow: inset 0 0 2rem rgba(255, 255, 255, 0.2), 0 1rem 3rem rgba(0, 0, 0, 0.18);
    transform: rotate(8deg);
}

.hero-visual__drop {
    position: absolute;
    z-index: 3;
    top: 11%;
    right: 21%;
    width: 2.2rem;
    height: 2.8rem;
    border-radius: 65% 35% 62% 38% / 68% 35% 65% 32%;
    background: var(--color-accent-bright);
    transform: rotate(38deg);
}

.section-block {
    padding-block: clamp(3.5rem, 8vw, 6rem) 0;
}

.section-block--tint {
    position: relative;
}

.card-grid,
.link-grid {
    display: grid;
    margin: 0;
    padding: 0;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
    list-style: none;
}

.card {
    overflow: hidden;
    min-width: 0;
    padding: var(--space-4);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

.card h2,
.card h3 {
    font-size: 1.25rem;
}

.card > :last-child {
    margin-bottom: 0;
}

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

.category-card {
    border-top: 0.25rem solid var(--color-accent);
}

.product-card {
    display: flex;
    flex-direction: column;
}

.product-card > a:last-child {
    margin-top: auto;
    font-weight: 750;
}

.solution-visual {
    display: block;
    width: 100%;
    height: auto;
    margin-bottom: var(--space-4);
    border-radius: var(--radius-md);
}

.product-visual {
    width: 100%;
    height: auto;
    margin-bottom: var(--space-4);
    border-radius: calc(var(--radius-md) - 0.25rem);
}

.product-visual--fallback {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4 / 3;
    background:
        radial-gradient(circle at 76% 18%, rgba(46, 196, 182, 0.38), transparent 19%),
        linear-gradient(145deg, #eaf8f6, #cdece9);
}

.product-visual--fallback::before,
.product-visual--fallback::after,
.product-visual--fallback span {
    position: absolute;
    content: "";
}

.product-visual--fallback::before {
    top: 17%;
    left: calc(50% - 2.1rem);
    width: 4.2rem;
    height: 62%;
    border: 0.28rem solid var(--color-brand);
    border-top-width: 0.95rem;
    border-radius: 0.35rem 0.35rem 1.9rem 1.9rem;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.45) 45%, rgba(8, 127, 120, 0.45) 46%);
    transform: rotate(7deg);
}

.product-visual--fallback::after {
    top: 15%;
    right: 18%;
    width: 1.1rem;
    height: 1.35rem;
    border-radius: 70% 35% 65% 35%;
    background: var(--color-accent);
    transform: rotate(35deg);
}

.product-visual--fallback span {
    inset: 11%;
    border: 1px solid rgba(7, 59, 76, 0.16);
    border-radius: 50%;
}

.link-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.link-card {
    display: flex;
    min-height: 5.5rem;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: var(--space-4);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    color: var(--color-brand);
    background: #fff;
    box-shadow: var(--shadow-sm);
    font-weight: 750;
    text-decoration: none;
}

.link-card span {
    color: var(--color-accent);
    font-size: 1.5rem;
}

.breadcrumbs {
    display: flex;
    overflow-x: auto;
    align-items: center;
    gap: 0.55rem;
    margin-bottom: var(--space-4);
    color: var(--color-muted);
    font-size: 0.88rem;
    white-space: nowrap;
    scrollbar-width: thin;
}

.breadcrumbs > * + *::before {
    margin-right: 0.55rem;
    color: #89a1aa;
    content: "/";
}

.filter-bar {
    display: grid;
    align-items: end;
    margin-block: var(--space-5);
    padding: var(--space-4);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    grid-template-columns: minmax(12rem, 1.3fr) minmax(11rem, 1fr) auto;
    gap: var(--space-3);
    background: #fff;
    box-shadow: var(--shadow-sm);
}

.field {
    display: grid;
    min-width: 0;
    gap: 0.35rem;
}

label {
    color: var(--color-brand);
    font-size: 0.88rem;
    font-weight: 750;
}

input,
select,
textarea {
    width: 100%;
    min-height: 3rem;
    padding: 0.65rem 0.8rem;
    border: 1px solid #9bb0b8;
    border-radius: var(--radius-sm);
    color: var(--color-ink);
    background: #fff;
}

button[type="submit"] {
    min-height: 3rem;
    padding: 0.65rem 1.15rem;
    border: 0;
    border-radius: var(--radius-sm);
    color: #fff;
    background: var(--color-accent);
    font-weight: 750;
    cursor: pointer;
}

[aria-invalid="true"],
.field-error {
    border-color: var(--color-error);
}

.field-error,
.error-message {
    color: var(--color-error);
    font-weight: 650;
}

.product-detail {
    display: grid;
    align-items: start;
    grid-template-columns: minmax(17rem, 0.75fr) minmax(0, 1.25fr);
    gap: clamp(2rem, 5vw, 5rem);
}

.product-detail__visual {
    position: sticky;
    top: 9rem;
}

.product-visual--large {
    min-height: 23rem;
}

.product-detail__intro > p:not(.eyebrow) {
    max-width: var(--reading-width);
}

.spec-grid {
    display: grid;
    grid-column: 1 / -1;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
}

.spec-card {
    min-width: 0;
    padding: var(--space-4);
    border-left: 0.24rem solid var(--color-accent);
    border-radius: var(--radius-sm);
    background: #fff;
    box-shadow: var(--shadow-sm);
}

.spec-card h2 {
    font-size: 1.2rem;
}

.spec-card ul {
    margin: 0;
}

.prose {
    max-width: var(--reading-width);
    padding: clamp(1.5rem, 4vw, 3.5rem);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    background: #fff;
    box-shadow: var(--shadow-sm);
}

.prose h1 {
    font-size: clamp(2rem, 6vw, 3.8rem);
}

.prose dl {
    display: grid;
    grid-template-columns: minmax(7rem, auto) 1fr;
    gap: 0.75rem 1rem;
}

.prose dt {
    color: var(--color-brand);
    font-weight: 750;
}

.prose dd {
    min-width: 0;
    margin: 0;
    overflow-wrap: anywhere;
}

.error-page {
    margin-inline: auto;
    text-align: center;
}

.error-page h1 {
    margin-inline: auto;
}

.site-footer {
    color: #d7e7e9;
    background: var(--color-brand-strong);
}

.site-footer__inner {
    display: grid;
    min-height: 10rem;
    align-items: center;
    padding-block: var(--space-5);
    grid-template-columns: auto 1fr auto;
    gap: var(--space-5);
}

.site-footer p {
    margin: 0;
    text-align: center;
}

.site-footer a {
    color: #fff;
}

.brand--footer {
    color: #fff;
}

@media (max-width: 63.99rem) {
    .category-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .card-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .spec-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .primary-nav {
        gap: 0.55rem;
    }

    .primary-nav > a:not(.button) {
        font-size: 0.82rem;
    }
}

@media (max-width: 47.99rem) {
    :root {
        --space-7: 3.5rem;
    }

    .container {
        width: min(100% - 1.25rem, var(--container));
    }

    .utility-bar__inner {
        min-height: 2rem;
    }

    .utility-bar p {
        overflow: hidden;
        max-width: 68%;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .site-header__inner {
        min-height: 4.25rem;
    }

    .brand img {
        width: 2.35rem;
        height: 2.35rem;
    }

    .js .nav-toggle {
        display: inline-flex;
    }

    html:not(.js) .site-header__inner {
        flex-wrap: wrap;
    }

    html:not(.js) .primary-nav {
        flex-wrap: wrap;
        width: 100%;
        padding-bottom: var(--space-3);
    }

    .js .primary-nav {
        position: absolute;
        top: calc(100% + 1px);
        right: -0.625rem;
        left: -0.625rem;
        display: grid;
        padding: var(--space-3);
        border-bottom: 1px solid var(--color-line);
        gap: 0.15rem;
        background: #fff;
        box-shadow: var(--shadow-lg);
    }

    .js .primary-nav[hidden] {
        display: none;
    }

    .primary-nav > a:not(.button) {
        padding: 0.75rem;
        border-radius: var(--radius-sm);
        font-size: 1rem;
    }

    .primary-nav > a:not(.button):hover {
        background: var(--color-accent-soft);
    }

    .primary-nav > a:not(.button)::after {
        content: none;
    }

    .hero {
        min-height: auto;
        padding: 2rem 1.35rem;
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .hero-visual {
        width: min(72vw, 17rem);
    }

    .card-grid,
    .category-grid,
    .inquiry-form__grid,
    .link-grid,
    .spec-grid {
        grid-template-columns: 1fr;
    }

    .filter-bar {
        grid-template-columns: 1fr;
    }

    .product-detail {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .product-detail__visual {
        position: static;
    }

    .product-visual--large {
        min-height: 16rem;
    }

    .site-footer__inner {
        justify-items: start;
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }

    .site-footer p {
        text-align: left;
    }
}

@media (max-width: 22.5rem) {
    .brand {
        font-size: 1.1rem;
    }

    .nav-toggle span:last-child {
        position: absolute;
        overflow: hidden;
        width: 1px;
        height: 1px;
        clip: rect(0 0 0 0);
        white-space: nowrap;
        clip-path: inset(50%);
    }

    .prose {
        padding: 1.25rem;
    }
}

@media (min-width: 90rem) {
    :root {
        font-size: 17px;
    }
}

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

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