:root {
    --accent: #16b8ac;
    --text: #222222;
    --muted: #8b8b8b;
    --soft: #f6f6f6;
    --line: #ececec;
    --footer: #f5f5f5;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: #ffffff;
    overflow-x: hidden;
}

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

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

.container {
    width: min(1600px, calc(100% - 160px));
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 32px;
    line-height: 1;
    font-weight: 700;
    letter-spacing: 1px;
}

.section-title::after {
    content: "";
    display: block;
    width: 48px;
    height: 3px;
    margin: 18px auto 0;
    background: var(--accent);
}

.header {
    height: 85px;
    border-bottom: 1px solid #f1f1f1;
    background: #ffffff;
    position: sticky;
    top: 0;
    z-index: 20;
}

.header-inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo img {
    width: 182px;
    height: auto;
}

.nav {
    display: flex;
    align-items: center;
    gap: 62px;
    margin-left: 90px;
    margin-right: auto;
}

.nav a {
    position: relative;
    font-size: 14px;
    color: #222;
    line-height: 84px;
}

.nav a.active {
    color: var(--accent);
    font-weight: 600;
}

.nav a.active::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -1px;
    width: 38px;
    height: 3px;
    background: var(--accent);
    transform: translateX(-50%);
}

.header-tools {
    display: flex;
    align-items: center;
    gap: 22px;
    color: #2d2d2d;
    font-size: 14px;
}

.mobile-language {
    display: none;
    position: relative;
    align-items: center;
    gap: 8px;
    height: 42px;
    padding: 0 34px 0 12px;
    border: 1px solid #dddddd;
    background: #ffffff;
    color: #333333;
    font-size: 13px;
    border-radius: 12px;
}

.mobile-language select {
    border: 0;
    background: transparent;
    appearance: none;
    -webkit-appearance: none;
    color: inherit;
    font: inherit;
    padding-right: 2px;
    outline: none;
}

.mobile-language::after {
    content: "";
    position: absolute;
    right: 13px;
    top: 50%;
    width: 7px;
    height: 7px;
    border-right: 1.5px solid #666;
    border-bottom: 1.5px solid #666;
    transform: translateY(-65%) rotate(45deg);
    pointer-events: none;
}

.menu-toggle {
    display: none;
    width: 38px;
    height: 38px;
    border: 0;
    background: transparent;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.menu-toggle span {
    width: 28px;
    height: 3px;
    background: #586270;
}

.tool {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.icon-search,
.icon-globe {
    position: relative;
    width: 20px;
    height: 20px;
    flex: 0 0 20px;
}

.icon-search::before {
    content: "";
    position: absolute;
    top: 1px;
    left: 1px;
    width: 12px;
    height: 12px;
    border: 2px solid #333;
    border-radius: 50%;
}

.icon-search::after {
    content: "";
    position: absolute;
    right: 1px;
    bottom: 1px;
    width: 7px;
    height: 2px;
    background: #333;
    transform: rotate(45deg);
    transform-origin: right center;
}

.icon-globe {
    border: 2px solid #333;
    border-radius: 50%;
}

.icon-globe::before,
.icon-globe::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 1px;
    bottom: 1px;
    width: 2px;
    background: #333;
    transform: translateX(-50%);
}

.icon-globe::after {
    left: 1px;
    right: 1px;
    top: 50%;
    width: auto;
    height: 2px;
    transform: translateY(-50%);
}

.products-strip {
    position: relative;
    height: 480px;
    overflow: hidden;
    background:
        linear-gradient(180deg, rgba(242, 249, 248, 0.56), rgba(242, 249, 248, 0.18)),
        url("https://images.unsplash.com/photo-1500530855697-b586d89ba3ee?auto=format&fit=crop&w=1920&q=80") center center / cover no-repeat;
}

.products-strip::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 50% 30%, rgba(255, 255, 255, 0.42) 0%, rgba(255, 255, 255, 0) 42%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0) 60%);
}

.products-strip::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 96px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.36) 100%),
        repeating-linear-gradient(172deg, rgba(153, 235, 255, 0.16) 0 2px, rgba(255, 255, 255, 0) 2px 13px);
    opacity: 0.9;
}

.products-strip-content {
    position: absolute;
    left: 50%;
    top: 50%;
    z-index: 1;
    text-align: center;
    transform: translate(-50%, -50%);
}

.products-strip-title {
    font-size: 32px;
    line-height: 1;
    font-weight: 700;
}

.products-strip-title::after {
    content: "";
    display: block;
    width: 58px;
    height: 3px;
    margin: 18px auto 0;
    background: var(--accent);
}

.products-strip-subtitle {
    margin-top: 34px;
    font-size: 20px;
    line-height: 1.4;
    color: #5d5d5d;
}

.hero {
    position: relative;
    height: 620px;
    overflow: hidden;
    background: #163325;
}

.hero-slider {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-slide {
    position: absolute;
    inset: 0;
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.hero-slide.active {
    opacity: 1;
}

.hero-slide.forest {
    background-image: url("https://images.unsplash.com/photo-1441974231531-c6227db76b6e?auto=format&fit=crop&w=1920&q=80");
}

.hero-slide.tech {
    background-image: url("https://images.unsplash.com/photo-1500530855697-b586d89ba3ee?auto=format&fit=crop&w=1920&q=80");
}

.hero-slide.lab {
    background-image: url("https://images.unsplash.com/photo-1581092918056-0c4c3acd3789?auto=format&fit=crop&w=1920&q=80");
}

.hero-globe {
    position: absolute;
    right: -40px;
    top: 60px;
    width: 760px;
    height: 760px;
    border-radius: 50%;
    background:
        radial-gradient(circle at 36% 30%, rgba(255, 255, 255, 0.98) 0%, rgba(191, 247, 255, 0.88) 17%, rgba(103, 210, 255, 0.45) 35%, rgba(45, 132, 211, 0.18) 58%, rgba(255, 255, 255, 0) 72%),
        radial-gradient(circle at 60% 56%, rgba(31, 87, 164, 0.14) 0%, rgba(31, 87, 164, 0.04) 48%, rgba(255, 255, 255, 0) 66%);
    box-shadow:
        inset -25px -18px 55px rgba(0, 49, 102, 0.2),
        0 0 75px rgba(118, 226, 255, 0.45),
        0 0 140px rgba(118, 226, 255, 0.22);
    border: 1px solid rgba(195, 243, 255, 0.64);
    pointer-events: none;
    opacity: 0.95;
}

.hero-globe::before,
.hero-globe::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(204, 244, 255, 0.28);
}

.hero-globe::before {
    inset: 7%;
}

.hero-globe::after {
    inset: 18%;
}

.hero-road-line {
    position: absolute;
    left: 0;
    right: 0;
    top: 410px;
    height: 2px;
    background: linear-gradient(90deg, rgba(194, 240, 255, 0) 0%, rgba(194, 240, 255, 0.88) 52%, rgba(194, 240, 255, 0) 100%);
    pointer-events: none;
}

.hero-content {
    position: absolute;
    left: 50%;
    top: 49%;
    z-index: 2;
    width: min(1200px, calc(100% - 80px));
    text-align: center;
    color: #ffffff;
    transform: translate(-50%, -50%);
    text-shadow: 0 3px 18px rgba(0, 0, 0, 0.22);
    pointer-events: none;
}

.hero-title {
    font-size: 72px;
    line-height: 1.15;
    font-weight: 700;
    letter-spacing: 8px;
}

.hero-subtitle {
    margin-top: 28px;
    font-size: 32px;
    line-height: 1.45;
    font-weight: 500;
}

.hero-dots {
    position: absolute;
    left: 50%;
    bottom: 28px;
    z-index: 3;
    display: flex;
    gap: 10px;
    transform: translateX(-50%);
}

.hero-dot {
    width: 34px;
    height: 4px;
    border: 0;
    background: rgba(255, 255, 255, 0.34);
    cursor: pointer;
}

.hero-dot.active {
    background: rgba(255, 255, 255, 0.92);
}

.about {
    padding: 120px 0 96px;
}

.about-layout {
    margin-top: 78px;
    display: grid;
    grid-template-columns: 540px 1fr;
    gap: 130px;
    align-items: start;
}

.about-side-label {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 24px;
}

.about-lead {
    font-size: 23px;
    line-height: 1.85;
    font-weight: 700;
    margin-bottom: 34px;
}

.about-photo {
    width: 450px;
    height: 280px;
    overflow: hidden;
}

.about-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
}

.about-copy p {
    font-size: 18px;
    line-height: 2;
    color: #666666;
    margin-bottom: 22px;
}

.about-stats {
    margin-top: 58px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
}

.about-stats dt {
    font-size: 16px;
    color: #4c4c4c;
    margin-bottom: 12px;
}

.about-stats dd {
    font-size: 56px;
    font-weight: 700;
    line-height: 1;
}

.outline-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 118px;
    height: 38px;
    padding: 0 18px;
    border: 1px solid #9d9d9d;
    font-size: 14px;
    color: #333;
    background: transparent;
}

.about-more {
    margin-top: 44px;
    text-align: center;
}

.products {
    padding-bottom: 118px;
}

.products-grid {
    width: min(1600px, calc(100% - 160px));
    margin: 78px auto 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    background: #fafafa;
    border-radius: 10px;
    padding: 36px 26px 30px;
    text-align: center;
}

.product-card h3 {
    font-size: 26px;
    line-height: 1;
    margin-bottom: 22px;
}

.product-card p {
    font-size: 14px;
    color: #9f9f9f;
    margin-bottom: 28px;
}

.product-thumb {
    width: 164px;
    height: 148px;
    margin: 0 auto 30px;
    overflow: hidden;
    background: #ffffff;
}

.product-thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center bottom;
}

.product-link {
    font-size: 16px;
    color: #555;
}

.products-more,
.news-more {
    margin-top: 62px;
    text-align: center;
}

.news {
    padding: 92px 0 112px;
}

.news-header {
    margin-top: 78px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.news-tabs {
    display: flex;
    align-items: center;
    gap: 34px;
    font-size: 17px;
    font-weight: 600;
}

.news-tabs a {
    color: #9d9d9d;
}

.news-tabs a.active {
    color: var(--accent);
}

.news-arrows {
    display: flex;
    gap: 18px;
}

.news-arrows span {
    width: 42px;
    height: 42px;
    border: 1px solid #d9d9d9;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: 23px;
    color: #a2a2a2;
}

.news-grid {
    margin-top: 32px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 36px;
}

.news-card {
    display: block;
    transition: transform .2s ease, box-shadow .2s ease;
}

.news-card:hover {
    transform: translateY(-4px);
}

.news-card img {
    width: 100%;
    height: 210px;
    object-fit: cover;
    object-position: top center;
}

.news-card h3 {
    margin-top: 22px;
    font-size: 22px;
    line-height: 1.45;
    font-weight: 600;
}

.news-card:hover h3 {
    color: var(--accent);
}

.news-card p {
    margin-top: 22px;
    font-size: 15px;
    line-height: 2;
    color: #666666;
}

.news-card time {
    display: block;
    margin-top: 26px;
    text-align: right;
    font-size: 15px;
    color: #9d9d9d;
}

.footer {
    background: var(--footer);
    border-top: 1px solid #efefef;
}

.footer-main {
    padding: 76px 0 48px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.7fr repeat(5, 1fr);
    gap: 46px;
}

.footer-contact {
    padding-right: 42px;
    border-right: 1px solid #e6e6e6;
}

.footer-contact h4,
.footer-links h4 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 18px;
}

.footer-contact .strong {
    font-size: 23px;
    font-weight: 700;
    margin-bottom: 28px;
}

.footer-contact .small {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}

.footer-links a {
    display: block;
    font-size: 14px;
    color: #666666;
    line-height: 2.15;
}

.footer-bottom {
    border-top: 1px solid #ebebeb;
    padding: 18px 0;
    color: #b2b2b2;
    font-size: 13px;
}

.footer-bottom .container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 38px;
    flex-wrap: wrap;
}

@media (max-width: 1440px) {
    .container,
    .products-grid {
        width: calc(100% - 80px);
    }

    .about-layout {
        gap: 70px;
    }

    .hero {
        height: 560px;
    }

    .hero-globe {
        right: -80px;
        top: 72px;
        width: 640px;
        height: 640px;
    }

    .hero-road-line {
        top: 373px;
    }

    .hero-content {
        width: 1080px;
    }

    .hero-title {
        font-size: 62px;
    }

    .hero-subtitle {
        font-size: 28px;
    }

    .products-strip {
        height: 420px;
    }
}

@media (max-width: 1200px) {
    .container,
    .products-grid {
        width: calc(100% - 64px);
    }

    .nav {
        gap: 34px;
        margin-left: 42px;
    }

    .hero {
        height: 540px;
    }

    .hero-globe {
        right: -120px;
        top: 92px;
        width: 560px;
        height: 560px;
    }

    .hero-road-line {
        top: 360px;
    }

    .hero-title {
        font-size: 56px;
        letter-spacing: 5px;
    }

    .hero-subtitle {
        font-size: 24px;
    }

    .about-layout {
        gap: 50px;
        grid-template-columns: 440px 1fr;
    }

    .about-lead {
        font-size: 20px;
    }

    .about-copy p {
        font-size: 16px;
    }

    .products-strip {
        height: 400px;
    }

    .products-grid,
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 36px;
    }

    .footer-contact {
        grid-column: 1 / -1;
        padding-right: 0;
        padding-bottom: 24px;
        border-right: 0;
        border-bottom: 1px solid #e6e6e6;
    }
}

@media (max-width: 860px) {
    .container,
    .products-grid {
        width: calc(100% - 32px);
    }

    .header {
        height: 72px;
    }

    .header-inner {
        position: relative;
    }

    .logo img {
        width: 150px;
    }

    .nav {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        width: 100vw;
        z-index: 25;
        margin: 0;
        min-width: 0;
        min-height: calc(100dvh - 72px);
        padding: 12px 24px calc(24px + env(safe-area-inset-bottom));
        overflow-y: auto;
        gap: 0;
        flex-direction: column;
        align-items: stretch;
        background: rgba(255, 255, 255, 0.98);
        border-top: 1px solid #eef1f3;
        border-bottom: 1px solid #eef1f3;
        backdrop-filter: blur(10px);
        box-shadow: 0 18px 26px rgba(15, 37, 46, 0.08);
    }

    .nav.open {
        display: flex;
    }

    .nav a {
        width: 100%;
        line-height: 1.4;
        padding: 18px 16px;
        font-size: 17px;
        color: #556171;
    }

    .nav a.active::after {
        left: 16px;
        right: 16px;
        bottom: 0;
        width: auto;
        height: 3px;
        transform: none;
    }

    .header-tools .tool {
        display: none;
    }

    .mobile-language {
        display: inline-flex;
    }

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

    .hero {
        height: 420px;
    }

    .hero-globe {
        right: -120px;
        top: 98px;
        width: 360px;
        height: 360px;
    }

    .hero-road-line {
        top: 282px;
    }

    .hero-title {
        font-size: clamp(34px, 8vw, 46px);
        letter-spacing: 3px;
    }

    .hero-subtitle {
        margin-top: 18px;
        font-size: clamp(16px, 3.6vw, 22px);
        line-height: 1.6;
    }

    .about {
        padding: 72px 0;
    }

    .about-layout {
        margin-top: 54px;
        grid-template-columns: 1fr;
        gap: 34px;
    }

    .about-photo {
        width: 100%;
        height: auto;
        aspect-ratio: 16 / 10;
    }

    .about-stats {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 16px;
    }

    .about-stats dt {
        font-size: 14px;
        line-height: 1.5;
    }

    .about-stats dd {
        font-size: 42px;
    }

    .products {
        padding-bottom: 78px;
    }

    .products-strip {
        height: 300px;
    }

    .products-strip-title {
        font-size: 28px;
    }

    .products-strip-subtitle {
        margin-top: 20px;
        font-size: 16px;
    }

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

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
        margin-top: 32px;
    }

    .product-card {
        padding: 22px 14px 20px;
        border-radius: 16px;
    }

    .product-card h3 {
        font-size: 18px;
        margin-bottom: 12px;
    }

    .product-card p {
        margin-bottom: 16px;
        font-size: 12px;
        line-height: 1.7;
    }

    .product-thumb {
        width: 100%;
        max-width: 130px;
        height: 108px;
        margin-bottom: 16px;
    }

    .product-link {
        font-size: 14px;
    }

    .news-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .news {
        padding: 72px 0 82px;
    }

    .news-header {
        margin-top: 48px;
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }

    .news-tabs {
        flex-wrap: wrap;
        gap: 18px;
        font-size: 16px;
    }

    .news-arrows {
        align-self: flex-end;
    }

    .news-card img {
        height: auto;
        aspect-ratio: 16 / 9;
    }

    .footer-main {
        padding: 44px 0 32px;
    }

    .footer-links {
        display: none;
    }
}

@media (max-width: 560px) {
    .container,
    .products-grid {
        width: calc(100% - 24px);
    }

    .header-tools {
        gap: 10px;
    }

    .mobile-language {
        height: 38px;
        padding: 0 28px 0 10px;
        font-size: 12px;
        border-radius: 10px;
    }

    .section-title,
    .products-strip-title {
        font-size: 26px;
    }

    .hero {
        height: 360px;
    }

    .hero-globe {
        right: -110px;
        top: 122px;
        width: 260px;
        height: 260px;
    }

    .hero-road-line {
        top: 247px;
    }

    .hero-content {
        width: calc(100% - 30px);
    }

    .hero-title {
        font-size: 30px;
        letter-spacing: 2px;
    }

    .hero-subtitle {
        font-size: 14px;
    }

    .hero-dot {
        width: 24px;
    }

    .nav {
        top: 66px;
    }

    .about-side-label {
        font-size: 14px;
    }

    .about-lead {
        font-size: 17px;
        line-height: 1.7;
    }

    .about-copy p {
        font-size: 14px;
        line-height: 1.9;
    }

    .about-stats {
        gap: 10px;
    }

    .about-stats dt {
        font-size: 12px;
    }

    .about-stats dd {
        font-size: 34px;
    }

    .products-grid {
        gap: 10px;
    }

    .product-card h3,
    .news-card h3 {
        font-size: 22px;
    }

    .product-card h3 {
        font-size: 16px;
    }

    .product-card p {
        font-size: 11px;
    }

    .product-thumb {
        max-width: 112px;
        height: 92px;
    }

    .news-card p {
        font-size: 14px;
    }

    .footer-bottom .container {
        gap: 10px;
        justify-content: flex-start;
    }
}