:root{--primary:#109fb4;--primary-dark:#08798d;--blue:#3977f6;--ink:#17324d;--muted:#607489;--line:#dce6ee;--soft:#f4f8fb;--white:#fff;--shadow:0 18px 45px rgba(27,68,101,.13);--radius:22px;--header-h:88px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:115px}body{margin:0;color:var(--ink);background:#fff;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input,select,textarea{font:inherit}.container{width:min(1200px,calc(100% - 48px));margin:auto}.section-space{padding:78px 0}.kicker{margin:0 0 8px;color:var(--primary);font-size:13px;font-weight:800;letter-spacing:.18em}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 26px;border-radius:8px;border:1px solid transparent;font-weight:700;cursor:pointer;transition:.25s}.btn.primary{background:linear-gradient(90deg,var(--primary),var(--blue));color:#fff;box-shadow:0 10px 22px rgba(33,126,190,.23)}.btn.primary:hover{transform:translateY(-2px)}.btn.light{background:#fff;color:var(--primary-dark)}.btn.ghost{border-color:#b9cad8;color:var(--ink);background:#fff}.hidden{display:none!important}
/* Header */
.site-header{position:sticky;top:0;z-index:1000;height:var(--header-h);background:#fff;border-bottom:1px solid #e4ebf1;box-shadow:0 3px 14px rgba(20,50,76,.04)}.header-inner{height:100%;max-width:1540px;margin:auto;padding:0 30px;display:flex;align-items:center;gap:22px;white-space:nowrap}.brand{display:flex;align-items:center;gap:12px;min-width:300px;flex:0 0 auto}.brand-mark{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;color:#093b57;font-size:27px;font-weight:900;background:linear-gradient(135deg,#4ee1df,#5b6df7)}.brand-copy{display:flex;flex-direction:column;line-height:1.35}.brand-copy strong{font-size:18px}.brand-copy small{font-size:12px;color:#6d7f90}.main-nav{margin-left:auto;display:flex;align-items:center;height:100%;gap:2px;min-width:0}.nav-link{position:relative;height:100%;display:flex;align-items:center;padding:0 12px;border:0;background:transparent;color:#314a60;font-size:16px;cursor:pointer;white-space:nowrap}.nav-link::after,.nav-dropdown.current>.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:0;height:3px;background:var(--primary);transform:scaleX(0);transition:.2s}.nav-link:hover,.nav-link.current,.nav-dropdown.current>.nav-link{color:var(--primary);font-weight:700}.nav-link.current::after,.nav-dropdown.current>.nav-link::after{transform:scaleX(1)}.dropdown-toggle i{font-style:normal;margin-left:7px;transition:.2s}.nav-dropdown{height:100%;position:relative}.dropdown-menu{position:absolute;top:76px;left:50%;width:430px;padding:12px;background:#fff;border:1px solid #dce6ee;border-radius:0 0 18px 18px;box-shadow:0 18px 45px rgba(27,68,101,.18);opacity:0;visibility:hidden;transform:translate(-50%,10px);transition:.2s;white-space:normal}.nav-dropdown:hover .dropdown-menu,.nav-dropdown.open .dropdown-menu{opacity:1;visibility:visible;transform:translate(-50%,0)}.nav-dropdown:hover .dropdown-toggle i,.nav-dropdown.open .dropdown-toggle i{transform:rotate(180deg)}.dropdown-menu a{display:grid;grid-template-columns:115px 1fr;align-items:center;gap:10px;padding:11px 12px;border-radius:10px}.dropdown-menu a:hover{background:#edf9fa}.dropdown-menu strong{color:#17324d}.dropdown-menu small{color:#73869a}.dropdown-menu .dropdown-all{display:block;margin-top:5px;text-align:center;color:var(--primary-dark);font-weight:700;background:#f1fbfc}.header-actions{display:flex;align-items:center;gap:12px}.language-switch{display:flex;align-items:center}.language-select{max-width:148px;height:38px;padding:0 34px 0 12px;border:1px solid #d9e3ea;border-radius:20px;background:#fff;color:#315068;font:inherit;font-size:13px;font-weight:700;cursor:pointer;outline:none}.language-select:hover,.language-select:focus{border-color:#66cbd6;box-shadow:0 0 0 3px rgba(38,175,191,.10)}.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.header-cta{padding:11px 18px;border-radius:24px;background:linear-gradient(90deg,#42cce0,#6d68f6);color:#fff;font-weight:700;white-space:nowrap}.menu-toggle{display:none;border:0;background:transparent;width:42px;height:42px;padding:8px}.menu-toggle span{display:block;height:2px;background:#17324d;margin:6px 0}
/* Carousel */
.home-carousel{position:relative;height:590px;overflow:hidden;background:#eef5f8}.carousel-track{height:100%;position:relative}.carousel-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;visibility:hidden;transition:opacity .6s ease}.carousel-slide.active{opacity:1;visibility:visible}.slide-content{width:min(1200px,calc(100% - 48px));margin:auto;padding-top:145px}.slide-content p{margin:0 0 12px;color:var(--primary-dark);font-weight:800;letter-spacing:.16em}.slide-content h1,.slide-content h2{width:590px;max-width:52%;margin:0 0 18px;font-size:54px;line-height:1.12;color:#17324d}.slide-content span{display:block;width:590px;max-width:50%;margin-bottom:28px;font-size:20px;color:#607489}.carousel-arrow{position:absolute;top:50%;transform:translateY(-50%);width:54px;height:54px;border-radius:50%;border:1px solid #bed0db;background:rgba(255,255,255,.86);font-size:39px;line-height:1;cursor:pointer;color:#17324d}.carousel-arrow.prev{left:24px}.carousel-arrow.next{right:24px}.carousel-dots{position:absolute;left:50%;bottom:22px;transform:translateX(-50%);display:flex;gap:10px}.carousel-dots button{width:10px;height:10px;border:0;border-radius:50%;background:#a6b5c2;padding:0;cursor:pointer}.carousel-dots button.active{width:30px;border-radius:8px;background:var(--primary)}
/* Home */
.section-heading{text-align:center}.section-heading.compact{max-width:760px;margin:0 auto 38px}.section-heading h2{margin:0 0 10px;font-size:38px}.section-heading p:last-child{margin:0;color:var(--muted)}.capability-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}.capability-card{padding:28px 22px;border:1px solid var(--line);border-radius:18px;background:#fff;transition:.25s}.capability-card:hover{transform:translateY(-6px);border-color:#8cd8df;box-shadow:var(--shadow)}.cap-icon{display:inline-flex;min-width:54px;height:38px;align-items:center;justify-content:center;padding:0 10px;border-radius:10px;background:#e7f8fa;color:var(--primary-dark);font-weight:900}.capability-card h3{margin:18px 0 7px}.capability-card p{margin:0;color:var(--muted);font-size:14px}.home-cta{background:linear-gradient(110deg,#0c8da3,#3469df);color:#fff}.cta-inner{min-height:225px;display:flex;align-items:center;justify-content:space-between;gap:30px}.cta-inner .kicker{color:#bff9ff}.cta-inner h2{margin:4px 0 7px;font-size:34px}.cta-inner p{margin:0;color:#dcecff}
/* Page banner */
.page-hero{padding:82px 0;background:linear-gradient(120deg,#eefbfc,#f1f3ff);border-bottom:1px solid #dfe9ef}.page-hero h1{margin:8px 0 12px;font-size:46px}.page-hero p:last-child{max-width:760px;margin:0;color:var(--muted);font-size:18px}.service-anchor-bar{position:sticky;top:var(--header-h);z-index:80;background:#fff;border-bottom:1px solid var(--line)}.service-anchor-bar .container{display:flex;gap:5px;overflow:auto}.service-anchor-bar a{padding:15px 18px;white-space:nowrap;color:#4d6478}.service-anchor-bar a:hover{color:var(--primary);background:#effafb}.services-container{padding:25px 0 80px}.service-section{padding:70px 0;border-bottom:1px solid var(--line)}.service-title-row{display:flex;justify-content:space-between;gap:30px;align-items:flex-start}.service-title-row h2{font-size:39px;margin:4px 0 8px}.service-title-row p:last-child{margin:0;color:var(--muted)}.service-index{font-size:64px;font-weight:900;color:#e4eef3;line-height:1}.subcategory-list{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 30px}.subcategory-list span{padding:7px 14px;border-radius:18px;background:#edf8fa;color:#146d79;font-size:14px}.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.case-card{overflow:hidden;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 8px 22px rgba(26,64,94,.06);transition:.25s}.case-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.case-card img{width:100%;aspect-ratio:16/8.2;object-fit:cover;border-bottom:1px solid var(--line)}.case-card>div{padding:21px}.case-label{font-size:12px;color:var(--primary-dark);font-weight:800}.case-card h3{margin:5px 0 8px}.case-card p{margin:0;color:var(--muted);font-size:14px}
/* About */
.about-layout{display:grid;grid-template-columns:1.5fr .8fr;gap:50px}.about-main h2{font-size:36px;margin:0 0 18px}.about-main p{color:var(--muted);font-size:17px}.about-side{display:grid;gap:14px}.about-side div{padding:22px;border-radius:16px;background:#f3f8fb;border-left:4px solid var(--primary)}.about-side strong,.about-side span{display:block}.about-side strong{font-size:20px}.about-side span{color:var(--muted)}.values-section{padding:78px 0;background:#f4f8fb}.value-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.value-grid article{padding:28px;border-radius:18px;background:#fff;border:1px solid var(--line)}.value-grid b{color:var(--primary);font-size:24px}.value-grid h3{margin:12px 0 6px}.value-grid p{margin:0;color:var(--muted)}
/* Contact & forms */
.contact-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:50px}.contact-info h2{font-size:34px;margin-top:0}.contact-method{padding:19px 0;border-bottom:1px solid var(--line)}.contact-method span{display:block;color:var(--primary);font-size:12px;font-weight:800}.contact-method a{font-size:20px;font-weight:700}.qr-box{display:flex;align-items:center;gap:20px;margin:28px 0;padding:20px;border-radius:18px;background:#f2f8fa}.qr-box img{width:150px;height:150px;object-fit:cover;border-radius:10px}.qr-box p,.contact-note p{margin:5px 0 0;color:var(--muted)}.contact-note{padding:20px;border-left:4px solid var(--blue);background:#f4f6ff}.contact-form{padding:30px;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:var(--shadow)}.contact-form label{display:block;margin-bottom:18px}.contact-form label>span{display:block;margin-bottom:7px;font-weight:700}.contact-form input,.contact-form select,.contact-form textarea{width:100%;border:1px solid #cbd9e3;border-radius:9px;padding:13px 14px;color:#17324d;background:#fff}.contact-form textarea{resize:vertical}.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{outline:2px solid #bceef2;border-color:var(--primary)}.form-note{color:var(--muted);font-size:13px}.consent-row{display:flex!important;align-items:flex-start;gap:10px}.consent-row input{width:auto;margin-top:6px}.deletion-form{margin-top:30px}
/* Policy/support */
.privacy-main{padding:70px 0;background:#f4f8fb;min-height:70vh}.privacy-card{width:min(980px,calc(100% - 48px));margin:auto;padding:48px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}.privacy-card h1{font-size:42px;margin:5px 0}.privacy-card h2{margin-top:34px;font-size:23px}.privacy-card p,.policy-list{color:#536a7e}.updated{color:#7d8e9e}.policy-notice{padding:22px;border-radius:14px;background:#eef9fa;border-left:4px solid var(--primary);margin:25px 0}.inline-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:15px}.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.info-box{padding:20px;background:#f5f9fb;border-radius:14px}.info-box h3{margin-top:0}
/* Footer / 404 */
.site-footer{background:#102b3d;color:#dbe7ed}.footer-inner{width:min(1200px,calc(100% - 48px));margin:auto;min-height:150px;display:grid;grid-template-columns:1.4fr 1fr auto;align-items:center;gap:30px}.footer-brand strong,.footer-brand span{display:block}.footer-brand span{color:#9fb2c0}.footer-links{display:flex;gap:18px;flex-wrap:wrap}.footer-links a:hover{color:#70dbe3}.footer-copy{font-size:12px;color:#8fa4b4}.not-found{min-height:70vh;display:grid;place-items:center;text-align:center}.not-found b{font-size:100px;color:#dfe9ef}.not-found h1{font-size:42px;margin:0}.not-found p{color:var(--muted)}
/* reveal */.reveal{animation:fadeUp .7s both}@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
@media(max-width:1280px){.brand{min-width:255px}.brand-copy strong{font-size:16px}.nav-link{padding:0 8px;font-size:14px}.header-cta{display:none}}
@media(max-width:900px){:root{--header-h:72px}.site-header{height:auto;min-height:var(--header-h)}.header-inner{min-height:var(--header-h);padding:0 18px}.brand{min-width:0;margin-right:auto}.brand-mark{width:44px;height:44px}.brand-copy strong{font-size:15px}.brand-copy small{display:none}.menu-toggle{display:block;order:3}.header-actions{order:2}.language-switch{display:flex}.language-select{width:116px;max-width:116px;height:36px;padding-left:9px;font-size:12px}.main-nav{position:absolute;left:0;right:0;top:72px;height:auto;display:none;flex-direction:column;align-items:stretch;background:#fff;border-top:1px solid var(--line);box-shadow:var(--shadow);padding:8px 18px 18px}.main-nav.open{display:flex}.nav-link,.nav-dropdown{height:auto}.nav-link{padding:13px 8px}.nav-link::after,.nav-dropdown.current>.nav-link::after{left:8px;right:auto;width:40px}.nav-dropdown{width:100%}.dropdown-toggle{width:100%;justify-content:space-between}.dropdown-menu{position:static;width:100%;opacity:1;visibility:visible;transform:none;display:none;box-shadow:none;border-radius:10px;margin:2px 0 8px}.nav-dropdown.open .dropdown-menu{display:block}.dropdown-menu a{grid-template-columns:1fr}.dropdown-menu small{display:none}.home-carousel{height:520px}.carousel-slide{background-position:62% center}.slide-content{padding-top:85px}.slide-content h1,.slide-content h2{font-size:42px;max-width:65%}.slide-content span{max-width:60%;font-size:17px}.case-grid,.value-grid{grid-template-columns:1fr 1fr}.contact-layout,.about-layout{grid-template-columns:1fr}.footer-inner{grid-template-columns:1fr;padding:35px 0}.footer-copy{padding-bottom:15px}}
@media(max-width:620px){.container,.slide-content,.footer-inner,.privacy-card{width:min(100% - 28px,1200px)}.brand-copy strong{font-size:14px}.home-carousel{height:560px}.carousel-slide{background-image:none!important;background:linear-gradient(135deg,#eefbfc,#edf1ff)!important}.slide-content{padding-top:82px}.slide-content h1,.slide-content h2{font-size:38px;max-width:100%;width:auto}.slide-content span{max-width:100%;width:auto}.carousel-arrow{width:44px;height:44px}.carousel-arrow.prev{left:8px}.carousel-arrow.next{right:8px}.capability-grid,.case-grid,.value-grid,.info-grid{grid-template-columns:1fr}.section-space{padding:58px 0}.page-hero{padding:58px 0}.page-hero h1{font-size:36px}.service-title-row h2{font-size:32px}.service-index{font-size:46px}.cta-inner{padding:40px 0;align-items:flex-start;flex-direction:column}.privacy-card{padding:28px 20px}.privacy-card h1{font-size:34px}.qr-box{align-items:flex-start;flex-direction:column}.dropdown-menu{padding:8px}}

/* v2 cache-safe corrections */
.site-header,.main-nav{background:#fff!important;color:var(--ink)}
body[data-page="home"] main{background:#fff}
body[data-page="home"] .site-footer{margin-top:0}

/* 2026-07-20 v3: real technical result images and consolidated navigation */
.dropdown-menu-compact{width:390px}
.case-card{transition:box-shadow .2s,border-color .2s}
.case-card:hover{transform:none;border-color:#bddbe3;box-shadow:0 12px 28px rgba(26,64,94,.10)}
.case-card img{aspect-ratio:16/9;object-fit:cover;background:#edf3f7}
@media(max-width:1180px){.header-inner{gap:12px}.brand{min-width:275px}.nav-link{padding:0 10px}.header-cta{padding:10px 14px}}
@media(max-width:900px){.dropdown-menu-compact{width:100%}}


/* 2026-07-20 v4: mobile dropdown positioning and viewport-fit correction */
@media (max-width:900px){
  .main-nav{
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    overscroll-behavior:contain;
    -webkit-overflow-scrolling:touch;
  }
  .nav-dropdown,
  .nav-dropdown .dropdown-toggle{
    width:100%;
  }
  .dropdown-menu,
  .dropdown-menu-compact{
    position:static!important;
    left:auto!important;
    right:auto!important;
    top:auto!important;
    width:100%!important;
    max-width:100%!important;
    margin:0 0 8px!important;
    transform:none!important;
    box-sizing:border-box;
    overflow:hidden;
  }
  .nav-dropdown:hover .dropdown-menu,
  .nav-dropdown.open .dropdown-menu{
    transform:none!important;
  }
  .dropdown-menu a{
    width:100%;
    min-height:48px;
    padding:12px 14px;
  }
  .dropdown-menu .dropdown-all{
    margin:4px 0 0;
  }
}

/* 2026-07-21 v5: large-model services and field-based solution pages */
.dropdown-menu-solutions{width:465px}
.solution-page-grid{padding:58px 0 82px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}
.solution-card{scroll-margin-top:155px;overflow:hidden;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:0 10px 28px rgba(26,64,94,.07)}
.solution-card img{display:block;width:100%;aspect-ratio:16/8.4;object-fit:cover;border-bottom:1px solid var(--line)}
.solution-card-body{padding:26px 28px 29px}
.solution-card h2{margin:7px 0 10px;font-size:27px;line-height:1.3}
.solution-card p{margin:0;color:var(--muted);line-height:1.75}
.solution-card ul{margin:17px 0 20px;padding-left:21px;color:#425c72;line-height:1.9}
.solution-card a{font-weight:800;color:var(--primary-dark)}
#llm{scroll-margin-top:150px}
@media(max-width:1180px){.dropdown-menu-solutions{width:430px}.solution-page-grid{grid-template-columns:1fr 1fr}}
@media(max-width:900px){.dropdown-menu-solutions{width:100%!important}.solution-page-grid{grid-template-columns:1fr;padding-top:28px}.solution-card{scroll-margin-top:105px}}
@media(max-width:620px){.solution-card-body{padding:22px 20px 25px}.solution-card h2{font-size:24px}.solution-page-grid{gap:20px}}

.case-card.text-only{display:flex;align-items:center;min-height:100%;background:linear-gradient(135deg,#f7fbfd,#eef8fa)}.case-card.text-only>div{padding:38px 30px}.solution-card.text-only{display:block;background:linear-gradient(135deg,#fff,#f5fbfd)}.solution-card.text-only .solution-card-body{padding:36px 34px}.solution-card.text-only h2{max-width:760px}
@media(max-width:620px){.language-select{width:104px;max-width:104px;font-size:11px}.brand-copy strong{max-width:142px;overflow:hidden;text-overflow:ellipsis}.case-card.text-only>div,.solution-card.text-only .solution-card-body{padding:25px 20px}}