:root{
  --ink:#1a2330;
  --ink-soft:#5a6678;
  --ink-faint:#8a97a8;
  --navy:#304078;
  --line:#e6ebf1;
  --bg:#ffffff;
  --bg-alt:#f7f6fa;
  --brand:#C03070;
  --brand-dark:#9c2258;
  --brand-soft:#f9edf3;
  --radius:10px;
  --shadow:0 8px 30px rgba(20,40,70,.07);
  --shadow-hover:0 14px 40px rgba(20,40,70,.12);
  --maxw:1200px;
  --header-h:72px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Segoe UI",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
[id]{scroll-margin-top:calc(var(--header-h) + 16px)}

/* 英文语言包里留空的 key 会回退中文并这样标记，方便找出待翻译文案 */
.i18n-missing{outline:1px dashed rgba(200,120,20,.75);outline-offset:2px;border-radius:2px}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--header-h);
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .25s,box-shadow .25s;
}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 2px 16px rgba(20,40,70,.06)}
.header-inner{height:var(--header-h);display:flex;align-items:center;gap:32px}

.brand{display:flex;align-items:center;flex-shrink:0}
.brand-logo{height:42px;width:auto}

.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;padding:10px 16px;font-size:15px;color:var(--ink-soft);
  border-radius:6px;transition:color .2s,background .2s;
}
.nav-link:hover{color:var(--brand)}
.nav-link.is-active{color:var(--ink);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
}
.nav-item{position:relative;display:flex}
.has-mega>.nav-link::before{content:"";position:absolute;inset:-12px}

.mega{
  position:absolute;top:100%;left:50%;transform:translate(-50%,10px);
  width:min(920px,calc(100vw - 48px));
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-hover);
  opacity:0;visibility:hidden;transition:opacity .22s,transform .22s,visibility .22s;
}
.has-mega:hover .mega,.mega:hover{opacity:1;visibility:visible;transform:translate(-50%,0)}
.mega-col h4{margin:0 0 10px;font-size:14px;color:var(--brand);letter-spacing:.3px}
.mega-col a{display:block;padding:5px 0;font-size:13.5px;color:var(--ink-soft);transition:color .2s}
.mega-col a:hover{color:var(--brand)}

.header-right{display:flex;align-items:center;gap:14px;flex-shrink:0}
.lang-switch{display:flex;align-items:center;gap:4px;font-size:13px}
.lang-btn{
  border:0;background:none;font:inherit;font-size:13px;color:var(--ink-faint);
  padding:4px 6px;border-radius:5px;cursor:pointer;transition:color .2s,background .2s;
}
.lang-btn:hover{color:var(--brand)}
.lang-btn.is-active{color:#fff;background:var(--brand);font-weight:600}
.lang-sep{color:var(--line)}

.nav-toggle{display:none;width:38px;height:38px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer;padding:9px 8px}
.nav-toggle span{display:block;height:2px;background:var(--ink);border-radius:2px;transition:transform .25s,opacity .25s}
.nav-toggle span+span{margin-top:5px}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- hero: two-slide flip ---------- */
.hero{
  position:relative;margin-top:var(--header-h);
  height:min(78vh,600px);min-height:460px;
  background:linear-gradient(180deg,#fff 0%,var(--brand-soft) 100%);
  overflow:hidden;
}
.hero-slide{
  position:absolute;inset:0;
  opacity:0;visibility:hidden;pointer-events:none;
  transform:translateY(18px) scale(.995);
  transition:opacity .8s ease,transform .8s ease,visibility 0s .8s;
}
.hero-slide.is-active{
  opacity:1;visibility:visible;pointer-events:auto;
  transform:none;
  transition:opacity .8s ease,transform .8s ease,visibility 0s 0s;
}
.hero-inner{height:100%;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:40px;padding-top:12px;padding-bottom:12px}
.hero-eyebrow{
  display:inline-block;margin:0 0 16px;padding:5px 14px;
  font-size:13px;letter-spacing:1px;color:var(--brand-dark);
  background:#fff;border:1px solid var(--brand);border-radius:999px;
}
.hero-title{margin:0 0 16px;font-size:clamp(28px,3.6vw,44px);line-height:1.28;letter-spacing:.5px;color:var(--navy)}
.hero-desc{margin:0 0 28px;max-width:520px;color:var(--ink-soft);font-size:16px}
.hero-media{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-hover);aspect-ratio:16/10;background:#fff}
.hero-media img{width:100%;height:100%;object-fit:cover;transform:scale(1.04);transition:transform 6s ease-out}
.hero-slide.is-active .hero-media img{transform:scale(1)}

.hero-copy>*{opacity:0;transform:translateY(16px)}
.hero-slide.is-active .hero-copy>*{animation:heroIn .7s cubic-bezier(.2,.7,.3,1) forwards}
.hero-slide.is-active .hero-copy>*:nth-child(1){animation-delay:.12s}
.hero-slide.is-active .hero-copy>*:nth-child(2){animation-delay:.22s}
.hero-slide.is-active .hero-copy>*:nth-child(3){animation-delay:.32s}
.hero-slide.is-active .hero-copy>*:nth-child(4){animation-delay:.42s}
@keyframes heroIn{to{opacity:1;transform:none}}

.btn{
  display:inline-block;padding:13px 32px;border-radius:999px;
  font-size:15px;font-weight:600;letter-spacing:.4px;
  transition:transform .2s,box-shadow .2s,background .2s,color .2s,border-color .2s;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 22px rgba(15,139,141,.28)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px)}
.btn-ghost{color:var(--brand-dark);box-shadow:inset 0 0 0 1.5px var(--brand);background:#fff}
.btn-ghost:hover{background:var(--brand);color:#fff;transform:translateY(-2px)}

.hero-arrow{
  position:absolute;top:50%;transform:translateY(-50%);z-index:3;
  width:44px;height:44px;border:1px solid var(--line);border-radius:50%;
  background:rgba(255,255,255,.85);color:var(--ink);font-size:26px;line-height:1;
  cursor:pointer;display:grid;place-items:center;
  opacity:0;transition:opacity .25s,background .2s,color .2s;
}
.hero-arrow.prev{left:24px}
.hero-arrow.next{right:24px}
.hero:hover .hero-arrow,.hero-arrow:focus-visible{opacity:1}
.hero-arrow:hover{background:var(--brand);color:#fff;border-color:var(--brand)}

.hero-dots{position:absolute;left:0;right:0;bottom:26px;z-index:3;display:flex;justify-content:center;gap:10px}
.hero-dot{
  width:10px;height:10px;padding:0;border:0;border-radius:999px;
  background:rgba(15,139,141,.25);cursor:pointer;transition:width .3s,background .3s;
}
.hero-dot.is-active{width:30px;background:var(--brand)}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:720px;margin:0 auto 48px;text-align:center}
.section-head.left{margin-left:0;text-align:left}
.section-head h2{margin:0 0 12px;font-size:30px;letter-spacing:.5px;position:relative;display:inline-block;padding-bottom:12px;color:var(--navy)}
.section-head h2::after{content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:0;width:44px;height:3px;background:var(--brand);border-radius:2px}
.section-head.left h2::after{left:0;transform:none}
.section-head p{margin:0;color:var(--ink-soft);font-size:15.5px}

.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}

/* 应用场景 */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.scene-card{
  padding:32px 24px;text-align:center;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.scene-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:transparent}
.scene-icon{width:52px;height:52px;margin-bottom:14px;fill:none;stroke:var(--brand);stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.scene-card h3{margin:0 0 10px;font-size:17.5px;color:var(--navy)}
.scene-card p{margin:0;font-size:13.5px;color:var(--ink-soft)}

/* 我们的技术 */
.tech-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.tech-card{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .25s,box-shadow .25s,border-color .25s}
.tech-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:transparent}
.tech-photo{
  aspect-ratio:16/10;display:grid;place-items:center;
  background:linear-gradient(135deg,#f0eef4,var(--brand-soft));
}
.tech-photo span{font-size:13px;letter-spacing:3px;color:var(--ink-faint);font-weight:700}
.tech-card figcaption{padding:20px 22px 24px}
.tech-card h3{margin:0 0 8px;font-size:17px;color:var(--navy)}
.tech-card p{margin:0;font-size:13.5px;color:var(--ink-soft)}
.cat-card{
  position:relative;display:flex;flex-direction:column;
  padding:28px 24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:transparent}
.cat-no{font-size:13px;font-weight:700;letter-spacing:1px;color:var(--brand);opacity:.55}
.cat-card h3{margin:8px 0 14px;font-size:19px}
.cat-card ul{flex:1;margin-bottom:18px}
.cat-card li{position:relative;padding:4px 0 4px 15px;font-size:13.5px;color:var(--ink-soft);line-height:1.6}
.cat-card li::before{content:"";position:absolute;left:0;top:13px;width:5px;height:5px;border-radius:50%;background:var(--brand)}
.cat-more{font-size:13px;color:var(--brand);font-weight:600}
.cat-more::after{content:" →";transition:margin .2s}
.cat-card:hover .cat-more::after{content:" ⟶";margin-left:4px}

.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-slogan{margin:0;font-size:15px;color:var(--brand-dark);font-weight:600}
.stat-row{display:flex;gap:40px;margin-top:32px;flex-wrap:wrap}
.stat strong{display:block;font-size:30px;color:var(--brand);line-height:1.2}
.stat span{font-size:13.5px;color:var(--ink-soft)}
.about-media{position:relative}
.about-img{aspect-ratio:4/3;border-radius:var(--radius);background:linear-gradient(135deg,#eef3f7,var(--brand-soft));box-shadow:var(--shadow);position:relative;overflow:hidden}
.about-img::after{content:"IMAGE";position:absolute;inset:0;display:grid;place-items:center;font-size:15px;letter-spacing:4px;color:var(--ink-faint);font-weight:700}
.about-note{margin:12px 0 0;font-size:12.5px;color:var(--ink-faint);text-align:center}

.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{
  display:block;padding:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:transparent}
.news-card time{font-size:12.5px;color:var(--brand);font-weight:600;letter-spacing:.5px}
.news-card h3{margin:10px 0 8px;font-size:16.5px;line-height:1.55}
.news-card p{margin:0;font-size:13.5px;color:var(--ink-soft)}

.contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:56px;align-items:start}
.info-list li{display:flex;gap:14px;padding:9px 0;font-size:14.5px;color:var(--ink-soft)}
.info-list li span{flex-shrink:0;width:48px;color:var(--ink);font-weight:600}
.contact-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.field{margin-bottom:16px}
.field.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.contact-form input,.contact-form textarea{
  width:100%;padding:12px 14px;font:inherit;font-size:14px;color:var(--ink);
  background:#fff;border:1px solid var(--line);border-radius:8px;transition:border-color .2s,box-shadow .2s;
}
.contact-form textarea{resize:vertical}
.contact-form input:focus,.contact-form textarea:focus{outline:0;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.contact-form .btn{width:100%;border:0;cursor:pointer}
.form-tip{margin:12px 0 0;font-size:12.5px;color:var(--ink-faint);text-align:center}
.form-tip.is-ok{color:var(--brand-dark)}

/* ---------- footer ---------- */
/* ---------- 二级页 ---------- */
.subpage{padding-top:var(--header-h)}
.page-top{padding:72px 0 88px}
.page-note{margin:36px 0 0;text-align:center;font-size:13px;color:var(--ink-faint)}
.site-footer{background:#141c27;color:#9aa7b6;padding:60px 0 24px}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.09)}
.footer-cols h4{margin:0 0 14px;font-size:15px;color:#fff}
.footer-cols a{display:block;padding:5px 0;font-size:13.5px;transition:color .2s}
.footer-cols a:hover{color:var(--brand)}
.footer-cols p{margin:0;padding:4px 0;font-size:13.5px}
.copyright{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;font-size:12.5px;color:#6f7d8d}
.copyright-right{display:flex;gap:18px;flex-wrap:wrap}
.icp:hover{color:var(--brand)}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .mega{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .nav-toggle{display:block}
  .nav{
    position:fixed;top:var(--header-h);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    max-height:calc(100vh - var(--header-h));overflow-y:auto;
    background:#fff;border-bottom:1px solid var(--line);
    padding:8px 24px 20px;
    transform:translateY(-130%);transition:transform .3s ease;
    box-shadow:var(--shadow-hover);margin-left:0;
  }
  .nav.is-open{transform:none}
  .nav-link{padding:14px 4px;font-size:16px;border-bottom:1px solid var(--line);border-radius:0}
  .nav-link.is-active::after{display:none}
  .nav-item{flex-direction:column}
  .mega{position:static;transform:none;width:auto;box-shadow:none;border:0;padding:6px 0 12px;opacity:1;visibility:visible;display:none;grid-template-columns:1fr}
  .nav-item.is-open .mega{display:grid}
  .hero{height:auto;min-height:0;padding:36px 0 76px}
  .hero-inner{grid-template-columns:1fr;gap:28px;padding-top:0;padding-bottom:0}
  .hero-slide{position:relative;inset:auto;display:none}
  .hero-slide.is-active{display:block}
  .hero-track{position:relative}
  .hero-arrow,.hero-dots{display:none}
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:36px}
  .news-grid{grid-template-columns:1fr}
  .section{padding:64px 0}
}
@media (max-width:640px){
  .cat-grid{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr}
  .tech-grid{grid-template-columns:1fr}
  .field.two{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr;gap:26px}
  .brand-logo{height:34px}
  .header-inner{gap:14px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}