:root{--navy:#091e36;--blue:#0066cc;--text:#34475a;--muted:#657588;--line:#e2e8f0;--light:#f8fafc;--gray:#f1f5f9;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--navy);font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:#fff;font-size:16px;line-height:1.75}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #0066cc;outline-offset:5px}button{color:inherit}img{max-width:100%;display:block}h1,h2,h3,p,figure{margin:0}h1,h2,h3{line-height:1.35}button{border:0}.container{width:min(1320px,calc(100% - 104px));margin:auto}.utility{background:var(--navy);color:#c5d1df;font-size:12px;letter-spacing:.07em}.utility .container{display:flex;justify-content:space-between;padding-block:8px}.header{background:#fff;position:sticky;top:0;z-index:20;border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;justify-content:space-between;height:94px}.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}.brand strong{display:block;font-size:26px;font-weight:650;letter-spacing:.08em;line-height:1.3}.brand small{font-size:9px;font-weight:600;letter-spacing:.16em;display:block;line-height:1.4;margin-top:5px;color:#506579}nav{display:flex;gap:32px;align-items:center;font-size:14px;font-weight:600}nav>a{padding-block:34px;position:relative}nav>a.active:after{content:"";height:3px;background:var(--blue);position:absolute;bottom:19px;left:0;right:0}nav .nav-contact{padding:11px 18px;background:var(--navy);color:#fff}nav .nav-contact span{margin-left:22px}.logout{background:none;font-size:12px;color:var(--muted);padding:8px 0}.menu-toggle{display:none}.hero{padding:46px 0 50px}.hero-grid{display:grid;grid-template-columns:1fr 1.03fr;gap:48px;align-items:stretch}.hero-copy{padding:33px 0 0}.eyebrow{font-size:12px;letter-spacing:.14em;font-weight:600;color:var(--blue)}.hero-copy>.eyebrow{display:flex;align-items:center;gap:12px;font-size:11px}.eyebrow>span:empty{width:22px;height:2px;background:var(--blue)}h1{font-size:clamp(40px,4.3vw,64px);letter-spacing:-.045em;font-weight:650;margin:31px 0 25px;line-height:1.3}h1>span{color:var(--blue)}.hero-description{color:var(--muted);font-size:16px;line-height:1.95}.hero-actions{display:flex;align-items:center;gap:28px;margin-top:32px}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:38px;padding:14px 23px;min-height:50px;font-size:14px;font-weight:600}.primary{background:var(--blue);color:#fff}.primary:hover{background:#004c99}.text-link{font-size:14px;font-weight:600;display:inline-flex;gap:22px;align-items:center}.text-link:hover{color:var(--blue)}.hero-foot{display:flex;align-items:center;gap:16px;border-top:1px solid var(--line);margin-top:48px;padding-top:23px;font-size:12px;color:var(--muted);line-height:1.8}.hero-foot b{font-weight:400;color:var(--navy)}.small-cross{font-size:31px;color:var(--blue);font-weight:300}.coordinate{margin-left:auto;font-size:11px;text-align:right;letter-spacing:.05em}.hero-visual{position:relative;min-height:530px;overflow:hidden;background:#d9e7ed}.hero-visual>img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}.hero-visual:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(9,30,54,.2),transparent 40%,rgba(9,30,54,.6))}.image-top{position:absolute;top:24px;left:26px;right:26px;display:flex;justify-content:space-between;font-size:11px;letter-spacing:.09em;color:#fff;z-index:1}.hero-visual figcaption{position:absolute;bottom:30px;left:26px;right:26px;display:flex;align-items:center;gap:15px;color:#fff;z-index:1;font-size:12px}.hero-visual figcaption strong{font-size:19px;font-weight:500;display:block;margin-top:4px}.caption-line{height:45px;width:2px;background:#fff}.hero-visual figcaption a{margin-left:auto;border:1px solid #ffffff80;font-size:25px;width:43px;height:43px;text-align:center}.overview{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:36px 0;background:var(--light)}.overview-grid{display:grid;grid-template-columns:1fr 1.18fr 1.18fr 1.18fr}.overview-intro h2{font-size:23px;margin-top:10px}.metric{padding-left:36px;border-left:1px solid var(--line)}.metric strong{font-size:45px;line-height:1.2;letter-spacing:-.04em;font-weight:500}.metric strong span{font-size:13px;margin-left:9px;color:var(--muted)}.metric h3{font-size:15px;margin:12px 0 4px}.metric p{font-size:12px;color:var(--muted)}.section{padding:84px 0}.section-heading{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:36px}.section h2{font-size:33px;letter-spacing:-.02em;margin-top:14px}.section-heading>p{font-size:14px;line-height:1.9;color:var(--muted)}.filter-row{display:flex;gap:30px;border-bottom:1px solid var(--line);margin-bottom:27px}.filter{background:none;padding:0 0 15px;font-size:14px;color:var(--muted);position:relative}.filter.active{color:var(--navy);font-weight:600}.filter.active:after{content:"";position:absolute;bottom:-1px;left:0;right:0;height:2px;background:var(--blue)}.filter small{margin-left:7px;font-weight:400;color:var(--blue);font-size:11px}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.product-card{border:1px solid var(--line);transition:border-color .2s}.product-card:hover{border-color:#9ab8d7}.product-card[hidden]{display:none}.product-art{height:206px;background-color:#edf3f8;position:relative;padding:20px;overflow:hidden;background-image:linear-gradient(#cfdfeb60 1px,transparent 1px),linear-gradient(90deg,#cfdfeb60 1px,transparent 1px);background-size:28px 28px}.art-label{font-size:10px;color:#536f87;letter-spacing:.1em}.technical-symbol{font-family:Arial,sans-serif;position:absolute;right:45px;top:7px;line-height:1.3;font-size:138px;color:#416b8e;font-weight:200}.art-note{font-size:11px;position:absolute;bottom:18px;color:#526c80;letter-spacing:.1em}.art-control{background-color:#f0f2f4}.art-system{background-color:#eaf2f7}.card-body{padding:27px}.card-body .eyebrow{font-size:10px}.card-body h3{font-size:22px;margin:12px 0}.card-body>p:not(.eyebrow){font-size:14px;color:var(--muted);line-height:1.9;min-height:80px}.card-link{display:flex;justify-content:space-between;width:100%;background:none;border-top:1px solid var(--line);margin-top:24px;padding:18px 0 0;font-size:13px;font-weight:600}.card-link span{font-size:20px;color:var(--blue)}.applications{background:var(--light);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.application-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:64px}.application-feature{background:#e9f0f5;padding:39px;display:flex;flex-direction:column;justify-content:center;min-height:380px;border-left:3px solid var(--blue)}.application-feature h3{font-size:30px;margin:23px 0;line-height:1.5}.application-feature p{color:var(--muted);font-size:14px}.application-feature a{margin-top:38px}.application-list article{display:flex;gap:24px;padding:25px 0;border-bottom:1px solid var(--line)}.application-list article:first-child{padding-top:8px}.application-list article>span:first-child{font-size:12px;color:var(--blue);padding-top:2px}.application-list small{font-size:12px;color:var(--muted)}.application-list h3{font-size:20px;margin:6px 0 10px}.application-list p{font-size:14px;color:var(--muted)}.row-arrow{margin-left:auto;color:#7d94a8}.muted{color:var(--muted);font-size:12px}.about-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:64px}.about h2{font-size:38px;line-height:1.5}.about-lead{font-size:22px;font-weight:500;margin-bottom:16px}.about-lead+p{font-size:15px;color:var(--muted)}.credentials{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:30px}.credentials>div{border-top:1px solid var(--line);padding-top:17px}.credentials span{font-size:12px;color:var(--muted);display:block}.credentials strong{font-size:14px;display:block;margin-top:9px}.credentials small{font-size:12px;color:var(--muted)}.contact{padding:55px 0;background:var(--navy);color:#fff}.contact-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:40px;align-items:center}.contact .eyebrow{color:#96bce4;font-size:11px}.contact h2{font-size:31px;margin-top:18px;line-height:1.5}.contact-details{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.contact-details>div{border-left:1px solid #ffffff30;padding-left:20px}.contact-details span{display:block;font-size:12px;color:#aebfd0}.contact-details strong{font-size:16px;display:block;margin-top:12px;font-weight:500}.contact-details small{font-size:12px;color:#aebfd0;display:block;margin-top:7px}footer{padding:36px 0 18px}.footer-top{display:flex;justify-content:space-between;align-items:center;padding-bottom:32px}.footer-top .brand strong{font-size:21px}.footer-top p,.footer-top>a:last-child{font-size:13px;color:var(--muted)}.footer-bottom{border-top:1px solid var(--line);padding-top:18px;display:flex;justify-content:space-between;font-size:12px;color:var(--muted)}dialog{max-width:550px;width:calc(100% - 40px);border:1px solid var(--line);padding:42px;color:var(--navy);box-shadow:0 20px 80px #091e3626}dialog::backdrop{background:#091e3670}dialog h2{margin:18px 0;font-size:28px}dialog p,dialog li{font-size:15px;color:var(--text)}dialog .eyebrow{font-size:11px;color:var(--blue)}dialog ul{padding-left:20px;margin-block:24px}.dialog-note{border-top:1px solid var(--line);padding:18px 0}.dialog-close{position:absolute;right:12px;top:6px;background:none;font-size:30px;padding:2px 10px}.skip-link{position:fixed;top:-100px;left:20px;padding:12px;background:#fff;z-index:100}.skip-link:focus{top:10px}.login-page{min-height:100vh;background:var(--light)}.login-header{padding:30px 0;border-bottom:1px solid var(--line);background:#fff}.login-shell{min-height:calc(100vh - 205px);display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:center;padding-block:65px}.login-intro h1{font-size:48px;margin-bottom:22px}.login-intro>p:not(.eyebrow){color:var(--muted);font-size:16px}.login-form{background:white;border:1px solid var(--line);padding:38px;max-width:450px;width:100%;justify-self:end}.login-form h2{font-size:27px}.login-form>p{font-size:14px;color:var(--muted);margin:10px 0 24px}.login-form label{display:block;font-size:14px;margin:17px 0 7px}.login-form input{border:1px solid #cbd5e1;width:100%;padding:12px 14px;background:#fff;color:var(--navy);border-radius:0;min-width:0}.password-row{display:flex}.password-row input{flex:1}.password-row button{background:var(--gray);border:1px solid #cbd5e1;border-left:0;font-size:12px;padding:0 13px;min-width:58px}.demo-hint{background:var(--light);border:1px solid var(--line);padding:15px;margin:20px 0;font-size:12px}.demo-hint p{display:flex;justify-content:space-between;align-items:center;gap:12px}.demo-hint code{font-size:14px;color:var(--blue)}.demo-hint button{background:none;color:var(--blue);font-size:12px;padding:9px 0 0}.login-form .button{width:100%;justify-content:center}.form-error{color:#aa2630!important;min-height:22px;margin:12px 0!important;font-size:13px!important}.login-note{font-size:12px!important;border-top:1px solid var(--line);padding-top:20px;margin-bottom:0!important}.login-footer{font-size:12px;color:var(--muted);display:flex;justify-content:space-between;padding:20px 0;border-top:1px solid var(--line)}
@media(min-width:1600px){.hero{padding-block:60px}.hero-visual{min-height:570px}}@media(max-width:1100px){.container{width:calc(100% - 64px)}nav{gap:20px}.hero-grid{gap:28px}.hero-actions{gap:19px}.button{gap:20px;padding-inline:17px}.hero-description{font-size:14px}.hero-visual{min-height:500px}.hero-foot{margin-top:35px}.metric{padding-left:24px}.metric p{max-width:175px}.application-grid,.about-grid{gap:35px}.contact-grid{grid-template-columns:1fr}.contact-details{margin-top:15px}.login-shell{gap:45px}}@media(max-width:800px){.container{width:calc(100% - 40px)}.utility .container>span:last-child{display:none}.header-inner{height:77px}.brand strong{font-size:23px}.menu-toggle{display:flex;gap:13px;background:none;font-size:14px}nav{display:none;position:absolute;top:77px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:18px 20px;flex-direction:column;align-items:stretch;gap:0}nav.open{display:flex}nav>a{padding:12px}nav>a.active:after{display:none}.logout{text-align:left;padding:13px}.hero{padding:24px 0 30px}.hero-grid{grid-template-columns:1fr;gap:30px}.hero-copy{padding-top:10px}h1{font-size:48px;margin-top:24px}.hero-description{font-size:15px}.hero-visual{min-height:390px}.hero-foot{margin-top:30px}.hero-actions{gap:27px}.overview-grid{grid-template-columns:1fr 1fr;gap:26px}.metric{padding-left:20px}.overview-intro{padding-left:20px}.metric:last-child{border-left:1px solid var(--line)}.metric:nth-child(3){border-left:0}.section{padding:54px 0}.section-heading{align-items:start;flex-direction:column;gap:16px;margin-bottom:27px}.section h2{font-size:28px}.section-heading>p br{display:none}.product-grid{grid-template-columns:1fr;gap:20px}.product-card{display:grid;grid-template-columns:.8fr 1.2fr}.product-art{height:100%;min-height:240px}.technical-symbol{font-size:110px;right:25px;top:50px}.card-body{padding:23px}.card-body>p:not(.eyebrow){min-height:0}.application-grid,.about-grid{grid-template-columns:1fr;gap:30px}.application-feature{min-height:320px;padding:30px}.application-list article{gap:18px}.about h2{font-size:32px}.contact h2{font-size:28px}.footer-top>p{display:none}.footer-bottom{flex-wrap:wrap;gap:12px}.footer-bottom>span:last-child{display:none}.login-shell{grid-template-columns:1fr;gap:35px;padding-block:40px}.login-intro h1{font-size:38px}.login-form{max-width:none;justify-self:stretch}.login-footer{gap:14px;flex-wrap:wrap}}@media(max-width:460px){h1{font-size:41px}.hero-copy>.eyebrow{font-size:9px;letter-spacing:.1em}.hero-visual{min-height:330px}.hero-actions{gap:18px}.hero-actions .button{font-size:13px}.text-link{font-size:13px;gap:12px}.hero-foot{gap:10px}.coordinate{font-size:10px}.overview{padding:26px 0}.overview-grid{column-gap:10px}.metric p{font-size:11px}.metric strong{font-size:37px}.overview-intro h2{font-size:21px}.section h2{font-size:25px}.product-card{display:block}.product-art{height:170px;min-height:170px}.technical-symbol{top:0;right:50px}.credentials{grid-template-columns:1fr}.contact-details{grid-template-columns:1fr 1fr;gap:26px 10px}.contact-details strong{font-size:14px}.footer-top .brand strong{font-size:18px}.footer-top .brand small{font-size:8px}.login-form{padding:25px}.login-intro h1{font-size:35px}.login-footer{font-size:11px}dialog{padding:29px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media(min-width:1101px){.product-grid{grid-template-columns:repeat(4,1fr);gap:20px}.card-body{padding:22px}.card-body h3{font-size:21px}.card-body>p:not(.eyebrow){min-height:108px}.product-art{height:177px}.technical-symbol{font-size:115px;right:30px;top:12px}.art-note{font-size:9px;letter-spacing:.02em}.card-body .eyebrow{font-size:9px;letter-spacing:.08em}}@media(min-width:801px) and (max-width:1100px){.product-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:460px){.filter-row{gap:19px}.filter{font-size:12px}}

/* Shared vector brand signature: river channel between two engineered banks. */
.brand{gap:11px}.brand-symbol{display:block;width:48px;height:48px;flex:0 0 48px}.brand-wordmark{display:block}.footer-top .brand-symbol{width:40px;height:40px;flex-basis:40px}.footer-top .brand small{font-size:8px;letter-spacing:.12em}@media(max-width:800px){.brand-symbol{width:43px;height:43px;flex-basis:43px}.brand small{font-size:8px;letter-spacing:.14em}}@media(max-width:460px){.footer-top .brand-symbol{width:35px;height:35px;flex-basis:35px}.footer-top .brand small{font-size:7px;letter-spacing:.08em}}

/* 备案号规范样式：增强视觉对比度、保证首屏与底栏无死角可见 */
.beian-link {
    color: #0f172a !important;
    font-weight: 600 !important;
    text-decoration: underline !important;
    text-underline-offset: 4px !important;
    transition: color 0.2s ease, text-decoration-color 0.2s ease;
}
.beian-link:hover {
    color: #0066cc !important;
    text-decoration-color: #0066cc !important;
}

/* 登录卡片内专属备案信息提示盒（双重保障） */
.login-beian-box {
    margin-top: 18px;
    padding: 10px 14px;
    background: #f8fafc;
    border: 1px dashed #cbd5e1;
    border-radius: 4px;
    font-size: 13px;
    color: #334155;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

/* 优化登录页垂直布局：紧凑自适应，让底栏在常规笔记本屏幕上也稳稳呈现于视野内 */
@media(min-height: 600px) {
    .login-page {
        min-height: 100vh;
        display: flex;
        flex-direction: column;
    }
    .login-header {
        padding: 18px 0 !important;
        flex-shrink: 0;
    }
    .login-shell {
        flex: 1 0 auto;
        min-height: 0 !important;
        padding-block: 24px !important;
        gap: 40px !important;
    }
    .login-intro h1 {
        font-size: 40px !important;
        margin-bottom: 14px !important;
    }
    .login-form {
        padding: 28px 30px !important;
    }
    .login-footer {
        flex-shrink: 0;
        padding: 16px 0 !important;
        font-size: 13px !important;
        color: #334155 !important;
        font-weight: 500;
        border-top: 2px solid #e2e8f0 !important;
        background: #ffffff;
    }
}

/* 官网首页底栏备案样式增强 */
.footer-bottom {
    font-size: 13px !important;
    color: #334155 !important;
    font-weight: 500;
}