:root {
            --ink: #242424;
            --muted: #808080;
            --bg: #f2f2f2;
            --panel: #ffffff;
            --dark: #282828;
            --line: rgba(36, 36, 36, .1);
            --accent: #f6a61d;
            --accent-2: #ffd27a;
            --radius: 8px;
            --max: 1240px;
            --section-gutter: var(--site-gutter, clamp(32px, 5.2vw, 132px));
            --shadow: 0 22px 70px rgba(0, 0, 0, .12);
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            color: var(--ink);
            background: var(--bg);
            font-family: SimHei, "Heiti SC", STHeiti, "Microsoft YaHei", Arial, sans-serif;
            line-height: 1.6;
        }

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

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

        button {
            font: inherit;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(36, 36, 36, .92);
            color: #fff;
            backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .nav-shell {
            width: calc(100% - 200px);
            max-width: none;
            height: 74px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            min-width: 132px;
        }

        .brand img {
            width: 132px;
            height: auto;
        }

        .brand span {
            display: none;
        }

        .nav-links {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: clamp(20px, 3vw, 48px);
            flex: 1;
        }

        .nav-links a {
            position: relative;
            color: rgba(255, 255, 255, .86);
            font-size: 14px;
            white-space: nowrap;
        }

        .nav-links a::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -12px;
            height: 2px;
            background: var(--accent);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform .2s ease;
        }

        .nav-links a:hover::after {
            transform: scaleX(1);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .lang-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: rgba(255, 255, 255, .82);
        }

        .lang-link::before {
            content: "";
            width: 13px;
            height: 13px;
            border: 1px solid currentColor;
            border-radius: 50%;
            opacity: .8;
        }

        .pill {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 38px;
            padding: 0 20px;
            border-radius: 999px;
            background: var(--accent);
            color: #242424;
            font-weight: 700;
            font-size: 14px;
            box-shadow: 0 10px 24px rgba(246, 166, 29, .3);
            border: 0;
            cursor: pointer;
            white-space: nowrap;
        }

        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid rgba(255, 255, 255, .18);
            border-radius: var(--radius);
            background: transparent;
            color: #fff;
            cursor: pointer;
        }

        .menu-toggle span {
            display: block;
            width: 18px;
            height: 2px;
            margin: 4px auto;
            background: currentColor;
        }

        .hero {
            min-height: 800px;
            position: relative;
            display: grid;
            align-items: end;
            color: #fff;
            background: #1b1b1b;
            overflow: hidden;
            cursor: pointer;
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background:
                linear-gradient(90deg, rgba(0, 0, 0, .72) 0%, rgba(0, 0, 0, .36) 43%, rgba(0, 0, 0, .1) 100%),
                linear-gradient(0deg, rgba(0, 0, 0, .46) 0%, rgba(0, 0, 0, .04) 48%);
            z-index: 1;
        }

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

        .hero.is-video-expanded {
            min-height: 0;
            display: block;
            overflow: visible;
            background: #000;
        }

        .hero.is-video-expanded::before {
            display: none;
        }

        .hero.is-video-expanded .hero-bg {
            position: relative;
            display: block;
            width: 100%;
            height: auto;
            object-fit: fill;
            object-position: center center;
        }

        .hero.is-video-expanded .hero-content {
            display: none;
        }

        .hero:fullscreen {
            width: 100vw;
            height: 100vh;
            min-height: 0;
            display: grid;
            place-items: center;
            background: #000;
            overflow: hidden;
        }

        .hero:fullscreen::before {
            display: none;
        }

        .hero:fullscreen .hero-bg {
            position: relative;
            inset: auto;
            width: 100vw;
            height: 100vh;
            object-fit: contain;
            object-position: center center;
        }

        .hero:fullscreen .hero-content {
            display: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            width: calc(100% - 200px);
            margin: 0 auto;
            padding: 160px 0 76px;
        }

        .eyebrow {
            margin: 0 0 28px;
            color: rgba(255, 255, 255, .76);
            font-size: clamp(14px, 1.5vw, 20px);
        }

        .hero h1 {
            margin: 0;
            max-width: 760px;
            font-size: clamp(52px, 8vw, 112px);
            line-height: 1;
            font-weight: 900;
        }

        .hero p {
            max-width: 700px;
            margin: 28px 0 0;
            color: rgba(255, 255, 255, .82);
            font-size: clamp(16px, 1.7vw, 22px);
        }

        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 36px;
        }

        .ghost {
            display: inline-flex;
            min-height: 42px;
            align-items: center;
            justify-content: center;
            padding: 0 22px;
            border: 1px solid rgba(255, 255, 255, .38);
            border-radius: 999px;
            color: #fff;
            font-weight: 700;
            white-space: nowrap;
        }

        main {
            overflow: hidden;
        }

        .section {
            width: min(var(--max), calc(100% - 48px));
            margin: 0 auto;
            padding: 82px 0;
        }

        .section-title {
            position: relative;
            z-index: 1;
            display: inline-block;
            margin: 0 0 54px;
            font-size: clamp(20px, 1.7vw, 30px);
            font-weight: 900;
            line-height: 1.1;
            isolation: isolate;
        }

        .section-title::before {
            display: none;
        }

        .section-title h2 {
            position: relative;
            z-index: 1;
            display: inline-block;
            margin: 0;
            font: inherit;
            isolation: isolate;
        }

        .section-title h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            z-index: -1;
            width: 10px;
            height: 34px;
            background: var(--accent);
            transform: translate(-2px, -50%) skew(-14deg);
            border-radius: 2px;
        }

        .product-list {
            display: grid;
            gap: clamp(26px, 2.6vw, 46px);
            width: 100%;
        }

        #products {
            width: 100%;
            padding-left: var(--section-gutter);
            padding-right: var(--section-gutter);
        }

        .product-row {
            display: grid;
            grid-template-columns: minmax(250px, 24vw) minmax(0, 1fr);
            gap: clamp(34px, 4.2vw, 108px);
            align-items: center;
        }

        .product-copy h3 {
            margin: 0 0 18px;
            font-size: clamp(32px, 2.5vw, 64px);
            line-height: 1.12;
            font-weight: 900;
        }

        .product-copy p {
            margin: 0;
            color: var(--muted);
            max-width: 34em;
            font-size: clamp(14px, .72vw, 18px);
        }

        .product-copy .tiny-pill {
            margin-top: 30px;
        }

        .tiny-pill {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            min-height: 28px;
            padding: 0 14px;
            border: 1px solid rgba(246, 166, 29, .55);
            border-radius: 999px;
            color: var(--accent);
            font-size: 12px;
            font-weight: 700;
            background: rgba(246, 166, 29, .06);
        }

        .tiny-pill::after {
            content: "";
            width: 6px;
            height: 6px;
            border-top: 1px solid currentColor;
            border-right: 1px solid currentColor;
            transform: rotate(45deg);
        }

        .product-media {
            position: relative;
            background: #ddd;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .product-media img {
            width: 100%;
            aspect-ratio: 1252 / 570;
            object-fit: cover;
        }

        .feature-tabs {
            position: absolute;
            left: 10px;
            right: 10px;
            bottom: 0;
            z-index: 2;
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 10px;
            background: transparent;
            color: rgba(36, 36, 36, .78);
            font-size: 14px;
        }

        .feature-tabs button {
            min-height: 44px;
            display: grid;
            place-items: center;
            border: 0;
            border-radius: var(--radius) var(--radius) 0 0;
            text-align: center;
            padding: 0 8px;
            color: inherit;
            background: rgba(244, 244, 244, .24);
            backdrop-filter: blur(8px);
            cursor: pointer;
            transition: background .2s ease, color .2s ease;
        }

        .feature-tabs button:hover,
        .feature-tabs button.is-active {
            color: #242424;
            background: rgba(246, 166, 29, .72);
        }

        .cases-section {
            width: 100%;
            padding-top: 36px;
            padding-left: 0;
            padding-right: 0;
        }

        .cases-section .section-title {
            width: 100%;
            margin: 0 auto 54px;
            padding-left: var(--section-gutter);
            padding-right: var(--section-gutter);
        }

        .case-stage {
            display: grid;
            grid-template-columns: minmax(220px, 1fr) minmax(520px, 2.55fr) minmax(220px, 1fr);
            gap: 24px;
            align-items: stretch;
            width: 100vw;
            height: clamp(330px, 31vw, 520px);
            margin-left: calc(50% - 50vw);
            padding: 0 24px;
        }

        .case-card {
            min-height: 0;
            height: 100%;
            border-radius: var(--radius);
            overflow: hidden;
            background: #ededed;
            position: relative;
            box-shadow: 0 18px 50px rgba(0, 0, 0, .1);
        }

        .case-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            background: #ededed;
        }

        .case-card.featured {
            height: 100%;
        }

        .case-caption {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 48px;
            margin-top: 36px;
        }

        .case-arrow {
            width: 58px;
            height: 58px;
            border-radius: 50%;
            border: 1px solid rgba(36, 36, 36, .08);
            background: rgba(255, 255, 255, .55);
            color: rgba(36, 36, 36, .35);
            font-size: 24px;
            cursor: pointer;
        }

        .case-caption strong {
            min-width: 180px;
            text-align: center;
            font-size: 28px;
            line-height: 1.2;
        }

        .case-caption p {
            display: none;
        }

        .patent-band {
            background: #2e2e2e;
            color: #fff;
            margin-top: 22px;
        }

        .patent-inner {
            width: 100%;
            margin: 0 auto;
            padding: 72px var(--section-gutter);
        }

        .patent-inner .section-title {
            margin-bottom: 36px;
        }

        .patent-inner .section-title h2 {
            color: #fff;
        }

        .certificate-showcase {
            min-height: 430px;
            display: grid;
            grid-template-columns: 1fr 1.4fr;
            align-items: center;
            gap: clamp(32px, 6vw, 96px);
            position: relative;
        }

        .certificate-copy h3 {
            margin: 0 0 14px;
            font-size: clamp(30px, 4.4vw, 58px);
            line-height: 1.08;
        }

        .certificate-copy p {
            margin: 0;
            color: rgba(255, 255, 255, .68);
        }

        .certificates {
            min-height: 310px;
            display: grid;
            place-items: center;
            padding: 0;
            background: transparent;
            border-radius: var(--radius);
        }

        .certificates img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        .cta-wrap {
            position: relative;
            width: 100%;
            margin: 0;
            padding: 50px;
            background: var(--bg);
            overflow: hidden;
        }

        .cta-wrap::before {
            display: none;
        }

        .cta-panel {
            position: relative;
            z-index: 1;
            width: 100%;
            margin: 0 auto;
            display: grid;
            grid-template-columns: minmax(0, 1fr) minmax(300px, .72fr);
            gap: clamp(24px, 4vw, 72px);
            align-items: center;
            min-height: clamp(260px, 27vw, 520px);
            aspect-ratio: 1774 / 572;
            padding: clamp(24px, 2.8vw, 42px);
            background: url("../flipximgs/4.png") center / 100% 100% no-repeat;
            color: #fff;
            border-radius: var(--radius);
            overflow: hidden;
        }

        .cta-panel h2 {
            position: absolute;
            width: 1px;
            height: 1px;
            overflow: hidden;
            clip: rect(0 0 0 0);
            white-space: nowrap;
        }

        .contact-list {
            grid-column: 2;
            display: grid;
            gap: 16px;
            align-self: center;
            padding-right: 150px;
        }

        .contact-item {
            display: grid;
            grid-template-columns: 24px 1fr;
            align-items: center;
            gap: 12px;
            color: rgba(255, 255, 255, .78);
            font-size: 14px;
        }

        .contact-item img {
            width: 22px;
            height: 22px;
            object-fit: contain;
        }

        .contact-list .pill {
            position: absolute;
            top: 50%;
            right: clamp(20px, 2.8vw, 42px);
            transform: translateY(-50%);
        }

        .site-footer {
            background: #303030;
            color: #fff;
        }

        .footer-inner {
            width: 100%;
            margin: 0 auto;
            padding: 68px var(--section-gutter) 44px;
        }

        .footer-top,
        .footer-bottom {
            display: grid;
            grid-template-columns: minmax(180px, .72fr) minmax(0, 2fr);
            gap: clamp(40px, 7vw, 110px);
        }

        .footer-top {
            align-items: start;
        }

        .footer-bottom {
            align-items: end;
            margin-top: 38px;
        }

        .footer-brand {
            display: flex;
            flex-direction: column;
        }

        .footer-logo {
            display: block;
            margin-bottom: 8px;
            width: 150px;
            height: auto;
        }

        .footer-brand p,
        .footer-brand li,
        .footer-menu a,
        .copyright {
            color: rgba(255, 255, 255, .58);
            font-size: 13px;
        }

        .footer-brand ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            gap: 9px;
        }

        .footer-brand li {
            display: grid;
            grid-template-columns: 18px 1fr;
            gap: 8px;
            align-items: center;
        }

        .footer-brand li img {
            width: 16px;
            height: 16px;
            object-fit: contain;
        }

        .footer-menu {
            display: grid;
            grid-template-columns: repeat(6, minmax(0, 1fr));
            gap: 24px;
        }

        .footer-menu h3 {
            margin: 0 0 16px;
            color: #fff;
            font-size: 14px;
        }

        .footer-menu a {
            display: block;
            margin-bottom: 9px;
        }

        .footer-socials {
            display: grid;
            justify-items: start;
            gap: 12px;
        }

        .footer-socials-title {
            margin: 0;
            color: var(--accent);
            font-size: 14px;
            font-weight: 700;
        }

        .footer-socials-list {
            display: flex;
            align-items: start;
            justify-content: flex-start;
            gap: 12px;
        }

        .footer-socials-item {
            display: grid;
            justify-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, .58);
            font-size: 12px;
            line-height: 1.2;
        }

        .footer-socials-item img {
            width: 35px;
            height: 35px;
        }

        .copyright {
            width: min(var(--max), calc(100% - 48px));
            margin: 0 auto;
            padding: 0 0 30px;
            text-align: center;
        }

        @media (max-width: 1080px) {
            .nav-links {
                gap: 18px;
            }

            .product-row {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .product-copy {
                max-width: min(620px, 70%);
            }

            .case-stage {
                grid-template-columns: minmax(0, 1fr);
                width: min(var(--max), calc(100% - 48px));
                height: auto;
                margin-left: auto;
                margin-right: auto;
                padding: 0;
            }

            .case-card:not(.featured) {
                display: none;
            }

            .certificate-showcase,
            .footer-top,
            .footer-bottom {
                grid-template-columns: 1fr;
            }

            .footer-bottom {
                align-items: start;
            }

            .footer-socials {
                justify-content: flex-start;
            }

            .footer-menu {
                grid-template-columns: repeat(3, minmax(0, 1fr));
            }
        }

        @media (max-width: 820px) {
            .nav-shell {
                width: min(var(--max), calc(100% - 32px));
                height: 66px;
            }

            .nav-links {
                position: absolute;
                left: 16px;
                right: 16px;
                top: 74px;
                display: none;
                grid-template-columns: 1fr;
                gap: 0;
                padding: 10px;
                background: rgba(36, 36, 36, .96);
                border: 1px solid rgba(255, 255, 255, .1);
                border-radius: var(--radius);
                box-shadow: 0 20px 50px rgba(0, 0, 0, .28);
            }

            .site-header.is-open .nav-links {
                display: grid;
            }

            .nav-links a {
                padding: 12px 10px;
            }

            .nav-links a::after {
                display: none;
            }

            .menu-toggle {
                display: block;
            }

            .nav-actions .pill {
                display: none;
            }

            .hero {
                min-height: 0;
                display: grid;
                align-items: end;
                background: #000;
            }

            .hero::before {
                display: none;
            }

            .hero-bg {
                position: relative;
                grid-area: 1 / 1;
                display: block;
                width: 100%;
                height: min(56.25vw, 360px);
                object-fit: cover;
                object-position: center top;
            }

            .hero {
                cursor: default;
            }

            .hero-content {
                grid-area: 1 / 1;
                align-self: end;
                display: none;
            }

            .hero-content,
            .section,
            .patent-inner,
            .copyright {
                width: calc(100% - 32px);
            }

            .cta-wrap {
                width: 100%;
                padding-left: 50px;
                padding-right: 50px;
            }

            :root {
                --section-gutter: 16px;
            }

            #products {
                width: 100%;
                padding-left: var(--section-gutter);
                padding-right: var(--section-gutter);
            }

            .cases-section,
            .patent-inner {
                width: 100%;
            }

            .product-copy {
                max-width: none;
            }

            .hero-content {
                padding: 124px 0 70px;
            }

            .hero h1 {
                font-size: clamp(42px, 11vw, 72px);
            }

            .hero p {
                font-size: 15px;
                line-height: 1.75;
            }

            .section {
                padding: 58px 0;
            }

            .section-title {
                margin-bottom: 34px;
            }

            .feature-tabs button {
                min-height: 38px;
                padding: 0 4px;
                font-size: 12px;
            }

            .case-stage {
                width: calc(100% - 32px);
            }

            .case-card,
            .case-card.featured {
                height: auto;
                aspect-ratio: 16 / 10;
            }

            .case-caption {
                flex-wrap: wrap;
                gap: 16px;
                margin-top: 26px;
            }

            .case-caption p {
                flex-basis: 100%;
            }

            .certificates {
                min-height: 0;
            }

            .certificates img {
                width: 100%;
                height: auto;
            }

            .cta-wrap {
                padding-top: 50px;
                padding-bottom: 50px;
            }

            .cta-panel {
                min-height: 250px;
                padding: 20px;
                grid-template-columns: minmax(0, 1fr) minmax(250px, .9fr);
            }

            .contact-list {
                grid-column: 2;
            }

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

        @media (max-width: 520px) {
            .brand {
                min-width: 0;
            }

            .brand span {
                display: none;
            }

            .hero h1 {
                font-size: clamp(38px, 12vw, 58px);
            }

            .hero p {
                font-size: 15px;
            }

            .product-copy h3 {
                font-size: clamp(28px, 8vw, 34px);
            }

            .product-copy p,
            .certificate-copy p,
            .contact-item,
            .footer-brand p,
            .footer-brand li,
            .footer-menu a {
                font-size: 13px;
                line-height: 1.7;
            }

            .product-media img {
                aspect-ratio: 16 / 10;
            }

            .certificate-copy h3 {
                font-size: clamp(28px, 8vw, 38px);
            }

            .patent-inner {
                padding-top: 54px;
                padding-bottom: 54px;
            }

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

            .feature-tabs {
                display: flex;
                overflow-x: auto;
                scrollbar-width: none;
            }

            .feature-tabs::-webkit-scrollbar {
                display: none;
            }

            .feature-tabs button {
                min-width: 92px;
            }

            .cta-panel {
                aspect-ratio: auto;
                min-height: 360px;
                grid-template-columns: 1fr;
                align-items: end;
                background-size: cover;
                background-position: left center;
            }

            .contact-list {
                grid-column: 1;
                padding: 16px;
            }

            .contact-list .pill {
                position: static;
                transform: none;
                justify-self: start;
                margin-top: 8px;
            }

            .cta-wrap {
                padding-left: 16px;
                padding-right: 16px;
            }
        }