:root{--ink:#091c35;--blue:#1265ff;--muted:#64748b;--line:#dce5ee;--cream:#f5f8fb;--fs-h1:1;--fs-h2:1;--fs-body:1;--fs-nav:1}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;font-size:calc(16px*var(--fs-body));line-height:1.65}header{height:78px;padding:0 max(3vw,20px);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #edf1f5;background:#fff;position:sticky;top:0;z-index:10;gap:20px}.logo{font-weight:800;letter-spacing:.03em;text-decoration:none;color:var(--ink);font-size:20px;display:flex;align-items:center;gap:10px;flex-shrink:0}.logo-sub-img{height:42px;width:auto}.logo-main-img{height:32px;width:auto}.logo span{color:var(--blue)}nav{display:flex;gap:16px;align-items:center;flex:1;justify-content:flex-end}nav a{color:var(--ink);text-decoration:none;font-size:calc(14px*var(--fs-nav))}.lang-switch{display:flex;align-items:center;gap:7px;border:1px solid var(--line);padding:3px 10px;border-radius:20px}.lang-switch a{color:#64748b;text-decoration:none;font-size:13px;font-weight:600;transition:color .15s}.lang-switch a:hover{color:#1265ff}.lang-switch a.active{color:#1265ff;font-weight:800}.lang-dot{width:3px;height:3px;border-radius:50%;background:#c3ccd8}.nav-cta{background:var(--ink);color:#fff;padding:8px 12px;border-radius:4px}.active{color:var(--blue);font-weight:700}.hero,section{padding:100px max(8vw,28px)}.hero{min-height:650px;position:relative;overflow:hidden}.eyebrow{letter-spacing:.16em;font-weight:700;font-size:12px;color:var(--blue);margin:0 0 18px}.hero h1,h2{line-height:1.16;letter-spacing:-.04em;margin:0;max-width:850px}.hero h1{font-size:calc(clamp(42px,6vw,88px)*var(--fs-h1))}h2{font-size:calc(clamp(32px,4vw,56px)*var(--fs-h2))}.lede{font-size:calc(20px*var(--fs-body));max-width:700px;color:var(--muted);margin:26px 0 35px}.button{display:inline-block;background:var(--blue);color:white;text-decoration:none;padding:13px 22px;border-radius:4px;font-weight:700}.actions{display:flex;align-items:center;gap:24px}.text-link{color:var(--ink);font-weight:700;text-decoration:none}.orb{position:absolute;width:560px;height:560px;border-radius:50%;right:-90px;top:80px;background:radial-gradient(circle at 30% 30%,#7bceff,transparent 32%),linear-gradient(145deg,#0854dd,#0ce0ca);opacity:.95;z-index:-1}.statement,.trust,.page-hero{background:var(--cream)}.statement{padding-top:60px;padding-bottom:60px}.statement p{font-size:calc(clamp(24px,3vw,42px)*var(--fs-h2));line-height:1.4;margin:0;max-width:1000px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:24px}.cards,.feature-grid,.solution-grid,.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:45px}.cards article,.feature-grid article,.solution-grid article,.case-grid article,.two-col article{border:1px solid var(--line);padding:26px;border-radius:8px}.cards h3,.feature-grid h3{margin:10px 0;font-size:calc(21px*var(--fs-body))}.cards p,.feature-grid p,.solution-grid p,.case-grid p,.two-col p{margin:0;color:var(--muted)}.cards article span,.feature-grid article span,.solution-grid article>span{font-size:12px;color:var(--blue);font-weight:800;letter-spacing:.1em}.dark{background:var(--ink);color:white}.dark .eyebrow{color:#7bceff}.split{display:grid;grid-template-columns:1fr 1.2fr;gap:70px}.model-list{border-top:1px solid #42607e}.model-list a{display:flex;gap:20px;align-items:center;border-bottom:1px solid #42607e;color:#fff;text-decoration:none;padding:18px 0;font-size:21px}.model-list b{font-size:12px;color:#7bceff}.model-list i{font-style:normal;margin-left:auto}.page-hero{padding:110px max(8vw,28px) 65px}.page-hero h1{font-size:calc(clamp(40px,5vw,72px)*var(--fs-h1));line-height:1.15;letter-spacing:-.04em;margin:0;max-width:950px}.feature-grid article,.solution-grid article,.case-grid article{min-height:220px}.solution-grid h2,.case-grid h2,.two-col h2{font-size:27px;margin:20px 0 12px;letter-spacing:-.03em}.solution-grid a{display:block;margin-top:20px;color:var(--blue);font-weight:700;text-decoration:none}.case-grid article>span{font-size:13px;color:var(--blue);font-weight:700}.notice{background:#fff5d8;border-left:3px solid #e4a20b;padding:16px 20px;margin:0 0 30px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px}.contact-details article{background:var(--cream)}
.contact-card{padding:36px 32px;border-radius:16px;border:1px solid #e2e9f2;box-shadow:0 12px 32px rgba(9,28,53,.07);position:relative;overflow:hidden}
.contact-card h2{padding-bottom:14px;margin-bottom:6px;position:relative}
.contact-card h2::after{content:"";position:absolute;left:0;bottom:0;width:52px;height:4px;border-radius:4px;background:linear-gradient(90deg,#0d5fae,#0ac5d8)}
.c-row{display:flex;align-items:center;gap:12px;padding:13px 0;border-bottom:1px dashed #e4ebf4}
.c-row:last-child{border-bottom:0}
.c-dot{width:32px;height:32px;border-radius:10px;flex:none;background:linear-gradient(135deg,#0d5fae,#0ac5d8);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;letter-spacing:.02em;box-shadow:0 6px 14px rgba(13,95,174,.25)}
.c-lab{font-weight:700;color:#0d5fae;min-width:86px;font-size:15px}
.c-val{color:#334155;font-size:15px;line-height:1.5;word-break:break-all}
.c-empty{color:#b6c2d0;font-style:normal}
@media(max-width:700px){.contact-card{padding:26px 20px}.c-row{flex-wrap:wrap;gap:8px}}footer{padding:28px max(8vw,28px);font-size:13px;color:var(--muted);display:flex;justify-content:space-between;gap:16px}footer a{color:inherit;text-decoration:none}@media(max-width:1120px){nav{gap:14px}nav a{font-size:calc(13.5px*var(--fs-nav))}.logo-sub-img,.logo-main-img{height:34px}.logo-word{height:32px}.logo-glow{font-size:22px}
.logo-text{font-size:22px;font-weight:800;letter-spacing:.04em;background:linear-gradient(90deg,#0d5fae,#0ac5d8);-webkit-background-clip:text;background-clip:text;color:transparent}
.logo-main-img{height:36px;width:auto}
.logo-sub-img{height:34px;width:auto}.logo-o{width:22px;height:22px}}
@media(max-width:640px){nav a:not(.lang-switch a):not(.nav-cta){display:none}.nav-cta{font-size:12px}.hero,section{padding-top:70px;padding-bottom:70px}.page-hero{padding-top:72px}.orb{width:300px;height:300px;right:-140px;top:240px}.cards,.feature-grid,.solution-grid,.case-grid,.two-col,.split{grid-template-columns:1fr}.hero{min-height:580px}.section-heading,footer{align-items:start;flex-direction:column}.model-list a{font-size:18px}}

/* ========== 全局 Toast 弹窗（表单提交反馈 · 居中） ========== */
#toast-root{position:fixed;inset:0;z-index:9999;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:transparent;pointer-events:none;padding:24px;}
.toast{pointer-events:auto;display:flex;align-items:flex-start;gap:12px;padding:18px 22px;background:#fff;border-radius:14px;box-shadow:0 12px 40px rgba(15,23,42,.22);font-size:15px;line-height:1.6;color:#1f2329;max-width:min(440px,calc(100vw - 48px));animation:toast-in .3s ease;}
.toast-ic{width:26px;height:26px;border-radius:50%;flex:none;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;margin-top:2px;}
.toast-ok .toast-ic{background:#e8f7ee;color:#389e0d;}
.toast-err .toast-ic{background:#fff1f0;color:#cf1322;}
.toast-tx{flex:1;min-width:0;word-break:break-word;}
.toast-x{flex:none;border:0;background:none;color:#8a919f;font-size:18px;line-height:1;cursor:pointer;padding:2px;margin-left:6px;}
.toast-x:hover{color:#1f2329;}
.toast-out{opacity:0;transform:scale(.94);transition:opacity .25s,transform .25s;}
@keyframes toast-in{from{opacity:0;transform:scale(.92);}to{opacity:1;transform:scale(1);}}
@media (prefers-reduced-motion:reduce){.toast{animation:none;}.toast-out{transition:none;}}

/* ===== 移动端适配：logo 区紧凑（≤640px，不影响桌面端） ===== */
@media(max-width:640px){
  .logo-sub-img{display:none}
  .logo-main-img{height:26px}
  .logo-text{font-size:19px}
  .logo{width:auto;gap:6px}
  header{padding:0 14px;gap:8px}
  .lang-switch{padding:2px 8px;gap:5px}
  .lang-switch a{font-size:12px}
  .nav-cta{padding:7px 10px;font-size:12px}
}