:root{
  --ink:#141821;
  --ink-soft:#3a4152;
  --muted:#6b7385;
  --line:#e6e8ef;
  --bg:#f6f7fb;
  --white:#ffffff;
  --brand:#ff3d5e;
  --brand-deep:#e0203f;
  --accent:#0f3bff;
  --cyan:#00d4d8;
  --amber:#ffb703;
  --violet:#7a3cff;
  --radius:18px;
  --shadow:0 10px 30px rgba(20,24,33,.08);
  --shadow-lg:0 22px 54px rgba(20,24,33,.14);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  color:var(--ink);
  background:
    radial-gradient(1100px 620px at 88% -8%, rgba(255,61,94,.16), transparent 62%),
    radial-gradient(900px 560px at 6% 12%, rgba(15,59,255,.12), transparent 60%),
    radial-gradient(800px 520px at 50% 100%, rgba(0,212,216,.10), transparent 65%),
    var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  backdrop-filter:blur(14px);
  background:rgba(255,255,255,.86);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:70px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.ai-page-logo{height:38px;width:auto}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:17px;letter-spacing:.5px}
.brand-text span{font-size:11px;color:var(--muted);letter-spacing:2px}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap}
.nav-links a{
  padding:8px 11px;font-size:14px;color:var(--ink-soft);border-radius:9px;
  transition:color .2s,background .2s;position:relative;white-space:nowrap;
}
.nav-links a:hover{color:var(--brand);background:rgba(255,61,94,.07)}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:none;cursor:pointer;font-family:inherit;font-weight:600;
  border-radius:12px;padding:12px 22px;font-size:15px;
  transition:transform .18s ease,box-shadow .22s ease,background .2s ease,color .2s;
}
.btn:active{transform:scale(.97)}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,var(--brand),#ff6b3d);
  box-shadow:0 10px 24px rgba(255,61,94,.32);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(255,61,94,.42)}
.btn-ghost{
  color:var(--ink);background:#fff;border:1.5px solid var(--line);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-blue{
  color:#fff;background:linear-gradient(135deg,var(--accent),#4d7bff);
  box-shadow:0 10px 24px rgba(15,59,255,.28);
}
.btn-blue:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(15,59,255,.36)}
.menu-toggle{display:none;width:44px;height:44px;border-radius:11px;border:1.5px solid var(--line);background:#fff;cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.menu-toggle span{display:block;width:19px;height:2px;background:var(--ink);border-radius:2px;transition:.25s}
.menu-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle.open span:nth-child(2){opacity:0}
.menu-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:74px 0 82px;
  background:
    radial-gradient(760px 460px at 92% 8%, rgba(255,61,94,.18), transparent 60%),
    radial-gradient(680px 420px at 4% 24%, rgba(15,59,255,.16), transparent 62%),
    linear-gradient(160deg,#ffffff 0%,#f4f6ff 58%,#fdf3f5 100%);
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(20,24,33,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(20,24,33,.045) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;border-radius:999px;font-size:13px;font-weight:600;
  color:var(--brand-deep);background:rgba(255,61,94,.1);border:1px solid rgba(255,61,94,.24);
}
.eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--brand);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(255,61,94,.55)}50%{box-shadow:0 0 0 7px rgba(255,61,94,0)}}
h1{
  font-size:clamp(30px,4.4vw,52px);line-height:1.22;letter-spacing:-.5px;
  margin:20px 0 18px;font-weight:800;color:var(--ink);
}
h1 .hl{
  color:var(--brand);position:relative;white-space:nowrap;
}
h1 .hl::after{
  content:"";position:absolute;left:0;right:0;bottom:4px;height:10px;
  background:rgba(255,183,3,.42);z-index:-1;border-radius:4px;
}
.hero p.lead{font-size:16.5px;color:var(--ink-soft);max-width:540px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:26px}
.hero-tags span{
  font-size:12.5px;padding:6px 13px;border-radius:999px;
  background:rgba(255,255,255,.85);border:1px solid var(--line);color:var(--ink-soft);
  transition:.2s;
}
.hero-tags span:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}

.hero-panel{
  position:relative;border-radius:24px;padding:26px;
  background:linear-gradient(160deg,#141821,#1e2434 55%,#2a1c26);
  color:#fff;box-shadow:var(--shadow-lg);
  border:1px solid rgba(255,255,255,.1);
}
.hero-panel::after{
  content:"";position:absolute;inset:-1px;border-radius:25px;pointer-events:none;
  background:linear-gradient(135deg,rgba(255,61,94,.55),transparent 42%,rgba(0,212,216,.45));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;padding:1px;
}
.panel-title{display:flex;align-items:center;justify-content:space-between;font-size:14px;color:#c8cedd;margin-bottom:18px}
.panel-title b{color:#fff;font-size:15px}
.panel-title em{font-style:normal;font-size:12px;color:#8ff3f5}
.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.metric{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  border-radius:14px;padding:14px 15px;transition:.25s;
}
.metric:hover{background:rgba(255,255,255,.11);transform:translateY(-3px)}
.metric b{display:block;font-size:24px;letter-spacing:-.5px;color:#fff}
.metric b small{font-size:13px;font-weight:600;color:#ffd0d8;margin-left:2px}
.metric span{font-size:12px;color:#a9b3c9}
.panel-note{
  margin-top:16px;font-size:12.5px;color:#b8c1d4;
  border-top:1px dashed rgba(255,255,255,.18);padding-top:14px;display:flex;gap:8px;align-items:flex-start;
}
.panel-note i{color:#8ff3f5;font-style:normal}

/* ---------- section generic ---------- */
section{padding:74px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.kicker{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;
  color:var(--brand-deep);text-transform:uppercase;margin-bottom:12px;
}
.kicker::before{content:"";display:inline-block;width:22px;height:2px;background:var(--brand);vertical-align:middle;margin-right:9px;border-radius:2px}
h2{font-size:clamp(24px,3.1vw,36px);line-height:1.3;letter-spacing:-.3px;font-weight:800;color:var(--ink)}
.section-head p{margin-top:14px;color:var(--muted);font-size:15.5px}

/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- about ---------- */
.about-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:start}
.about-text p{color:var(--ink-soft);font-size:15.5px;margin-bottom:14px}
.about-points{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:22px}
.point{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px;
  transition:.24s;
}
.point:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:rgba(255,61,94,.35)}
.point b{display:block;font-size:14.5px;margin-bottom:4px}
.point span{font-size:12.5px;color:var(--muted)}
.about-visual{display:flex;flex-direction:column;gap:14px}
.visual-card{
  border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#fff;
  box-shadow:var(--shadow);transition:.3s;
}
.visual-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.visual-card img{width:100%;height:auto;object-fit:contain}
.visual-card figcaption{padding:12px 16px;font-size:13px;color:var(--muted);border-top:1px solid var(--line)}
.visual-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.visual-row .visual-card img{aspect-ratio:16/10;object-fit:cover}

/* ---------- service cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.svc{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;overflow:hidden;transition:transform .26s ease,box-shadow .26s ease,border-color .26s;
}
.svc::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:4px;
  background:linear-gradient(90deg,var(--brand),var(--amber));
  transform:scaleX(0);transform-origin:left;transition:transform .3s ease;
}
.svc:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(255,61,94,.3)}
.svc:hover::before{transform:scaleX(1)}
.svc-ico{
  width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:800;color:#fff;margin-bottom:16px;
  background:linear-gradient(135deg,var(--brand),#ff7a4d);
}
.svc:nth-child(2) .svc-ico{background:linear-gradient(135deg,var(--accent),#5a86ff)}
.svc:nth-child(3) .svc-ico{background:linear-gradient(135deg,#00b8bd,var(--cyan))}
.svc:nth-child(4) .svc-ico{background:linear-gradient(135deg,var(--violet),#b07bff)}
.svc:nth-child(5) .svc-ico{background:linear-gradient(135deg,#f08c00,var(--amber))}
.svc:nth-child(6) .svc-ico{background:linear-gradient(135deg,#149e6a,#46d39a)}
.svc h3{font-size:17.5px;margin-bottom:9px;font-weight:700}
.svc p{font-size:14px;color:var(--muted)}
.svc-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px}
.svc-tags i{
  font-style:normal;font-size:11.5px;padding:4px 10px;border-radius:999px;
  background:var(--bg);color:var(--ink-soft);border:1px solid var(--line);
}

/* ---------- models strip ---------- */
.models-band{
  border-radius:24px;padding:34px;
  background:linear-gradient(135deg,#141821,#202838 62%,#2a1a24);
  color:#fff;box-shadow:var(--shadow-lg);position:relative;overflow:hidden;
}
.models-band::before{
  content:"";position:absolute;width:420px;height:420px;border-radius:50%;
  right:-140px;top:-180px;background:radial-gradient(circle,rgba(255,61,94,.35),transparent 68%);
}
.models-band h3{font-size:21px;margin-bottom:8px;position:relative}
.models-band > p{font-size:14px;color:#b8c1d4;margin-bottom:22px;position:relative}
.model-chips{display:flex;flex-wrap:wrap;gap:9px;position:relative}
.model-chips span{
  font-size:12.5px;padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);color:#e6eaf3;
  transition:.22s;
}
.model-chips span:hover{background:rgba(255,61,94,.24);border-color:rgba(255,61,94,.5);transform:translateY(-2px)}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:step}
.step{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px 18px;
  position:relative;transition:.26s;
}
.step:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(15,59,255,.28)}
.step-num{
  width:34px;height:34px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:14px;color:#fff;background:linear-gradient(135deg,var(--accent),#5a86ff);margin-bottom:14px;
}
.step:nth-child(2) .step-num{background:linear-gradient(135deg,var(--violet),#b07bff)}
.step:nth-child(3) .step-num{background:linear-gradient(135deg,#00b8bd,var(--cyan))}
.step:nth-child(4) .step-num{background:linear-gradient(135deg,#f08c00,var(--amber))}
.step:nth-child(5) .step-num{background:linear-gradient(135deg,var(--brand),#ff7a4d)}
.step b{display:block;font-size:15px;margin-bottom:6px}
.step span{font-size:13px;color:var(--muted)}

/* ---------- solutions ---------- */
.solution-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.sol{
  border-radius:16px;padding:22px 20px;border:1px solid var(--line);
  background:linear-gradient(180deg,#fff,#fbfbfe);transition:.26s;
}
.sol:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(255,183,3,.5)}
.sol b{display:block;font-size:16px;margin-bottom:8px}
.sol p{font-size:13.5px;color:var(--muted)}
.sol-tag{display:inline-block;margin-top:12px;font-size:11.5px;font-weight:700;color:var(--brand-deep);background:rgba(255,61,94,.09);padding:4px 11px;border-radius:999px}

/* ---------- network / price / timeline ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:start}
.panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow);
}
.panel h3{font-size:18.5px;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.panel h3::before{content:"";width:4px;height:18px;border-radius:3px;background:var(--brand)}
.net-list{display:grid;grid-template-columns:1fr 1fr;gap:11px}
.net-list li{
  font-size:13.5px;color:var(--ink-soft);padding:10px 13px;border-radius:11px;
  background:var(--bg);border:1px solid var(--line);display:flex;justify-content:space-between;gap:8px;
}
.net-list li b{font-weight:600;color:var(--ink)}
.net-list li em{font-style:normal;font-size:12px;color:var(--brand-deep)}

.price-table{width:100%;border-collapse:collapse;font-size:13.5px}
.price-table th,.price-table td{padding:12px 10px;text-align:left;border-bottom:1px solid var(--line)}
.price-table th{font-size:12.5px;color:var(--muted);font-weight:600;background:var(--bg)}
.price-table td b{color:var(--brand-deep)}
.price-table tr:hover td{background:#fcfcff}

.timeline{position:relative;padding-left:26px;margin-top:6px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--brand),var(--accent),var(--cyan))}
.timeline li{position:relative;padding-bottom:20px;font-size:14px;color:var(--ink-soft)}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{
  content:"";position:absolute;left:-25px;top:6px;width:11px;height:11px;border-radius:50%;
  background:#fff;border:2.5px solid var(--brand);
}
.timeline li b{display:block;color:var(--ink);margin-bottom:2px;font-size:14.5px}

/* ---------- compare ---------- */
.compare-wrap{display:grid;grid-template-columns:.62fr 1.38fr;gap:26px;align-items:start}
.score-card{
  background:linear-gradient(155deg,#141821,#232b3d 60%,#3a1f2a);
  color:#fff;border-radius:22px;padding:32px 28px;box-shadow:var(--shadow-lg);
  position:relative;overflow:hidden;
}
.score-card::after{
  content:"";position:absolute;width:280px;height:280px;border-radius:50%;right:-110px;bottom:-130px;
  background:radial-gradient(circle,rgba(255,61,94,.4),transparent 70%);
}
.stars{font-size:19px;letter-spacing:3px;color:var(--amber);margin-bottom:10px}
.score-num{font-size:56px;font-weight:800;line-height:1;letter-spacing:-2px}
.score-num small{font-size:17px;font-weight:600;color:#b8c1d4;margin-left:5px;letter-spacing:0}
.score-label{font-size:14px;color:#b8c1d4;margin-top:8px}
.score-divider{height:1px;background:rgba(255,255,255,.16);margin:20px 0}
.score-list li{font-size:13.5px;color:#d5dbe8;margin-bottom:10px;display:flex;gap:9px;align-items:flex-start}
.score-list li i{color:#8ff3f5;font-style:normal;flex-shrink:0}
.table-scroll{overflow-x:auto;border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
.cmp-table{width:100%;border-collapse:collapse;font-size:14px;min-width:560px}
.cmp-table th,.cmp-table td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line)}
.cmp-table thead th{background:#f8f9fd;font-size:13px;color:var(--ink-soft);font-weight:700}
.cmp-table thead th:nth-child(2){color:var(--brand-deep)}
.cmp-table tbody tr:hover{background:#fcfcff}
.cmp-table td:first-child{font-weight:600;color:var(--ink)}
.cmp-table td:nth-child(2){color:var(--brand-deep);font-weight:600}
.cmp-table td:nth-child(3){color:var(--muted)}

/* ---------- reviews ---------- */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  transition:.26s;display:flex;flex-direction:column;
}
.review:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:rgba(15,59,255,.24)}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{
  width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-weight:800;color:#fff;font-size:15px;flex-shrink:0;
  background:linear-gradient(135deg,var(--brand),#ff7a4d);
}
.review:nth-child(2) .avatar{background:linear-gradient(135deg,var(--accent),#5a86ff)}
.review:nth-child(3) .avatar{background:linear-gradient(135deg,#00b8bd,var(--cyan))}
.review:nth-child(4) .avatar{background:linear-gradient(135deg,var(--violet),#b07bff)}
.review:nth-child(5) .avatar{background:linear-gradient(135deg,#f08c00,var(--amber))}
.review:nth-child(6) .avatar{background:linear-gradient(135deg,#149e6a,#46d39a)}
.review-top b{display:block;font-size:14.5px}
.review-top span{font-size:12.5px;color:var(--muted)}
.review p{font-size:14px;color:var(--ink-soft);flex:1}
.review-stars{margin-top:14px;color:var(--amber);letter-spacing:2px;font-size:13px}

/* ---------- cases ---------- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case{
  border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow);transition:.3s;
}
.case:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.case-img{overflow:hidden;background:var(--bg)}
.case-img img{width:100%;height:auto;object-fit:cover;aspect-ratio:16/10;transition:transform .5s ease}
.case:hover .case-img img{transform:scale(1.045)}
.case-body{padding:20px}
.case-body b{font-size:15.5px;display:block;margin-bottom:7px}
.case-body p{font-size:13.5px;color:var(--muted)}
.case-meta{display:flex;flex-wrap:wrap;gap:7px;margin-top:13px}
.case-meta i{font-style:normal;font-size:11.5px;padding:3px 10px;border-radius:999px;background:rgba(255,61,94,.08);color:var(--brand-deep)}

/* ---------- articles ---------- */
.article-list{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.article{
  display:flex;flex-direction:column;justify-content:space-between;
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 16px;
  transition:.24s;min-height:132px;
}
.article:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(255,183,3,.55)}
.article b{font-size:14px;line-height:1.5;display:block}
.article span{font-size:12px;color:var(--brand-deep);font-weight:600;margin-top:12px;display:inline-block}

/* ---------- form ---------- */
.form-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:30px;align-items:start}
.form-side{
  background:linear-gradient(155deg,#141821,#212a3d 62%,#331e28);
  border-radius:22px;padding:32px 28px;color:#fff;box-shadow:var(--shadow-lg);
}
.form-side h3{font-size:21px;margin-bottom:12px}
.form-side p{font-size:14px;color:#b8c1d4;margin-bottom:22px}
.contact-list li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:#d5dbe8;margin-bottom:14px;word-break:break-all}
.contact-list li i{color:#8ff3f5;font-style:normal;flex-shrink:0}
.contact-list a{color:#8ff3f5;text-decoration:underline;text-underline-offset:3px}
.qr-box{margin-top:22px;display:flex;gap:14px;align-items:center;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:14px}
.qr-box img{width:92px;height:92px;object-fit:cover;border-radius:9px;background:#fff;flex-shrink:0}
.qr-box span{font-size:12.5px;color:#c8cedd;line-height:1.6}

.form-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:32px 28px;box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;font-weight:600;color:var(--ink-soft)}
.field label em{color:var(--brand);font-style:normal}
.field input,.field select,.field textarea{
  font-family:inherit;font-size:14px;color:var(--ink);
  border:1.5px solid var(--line);border-radius:11px;padding:12px 14px;background:#fbfbfe;
  transition:border-color .2s,box-shadow .2s,background .2s;width:100%;
}
.field textarea{resize:vertical;min-height:112px}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(255,61,94,.12);
}
.form-submit{margin-top:20px;display:flex;flex-wrap:wrap;align-items:center;gap:14px}
.form-submit small{font-size:12.5px;color:var(--muted)}
.form-msg{font-size:13.5px;font-weight:600;color:#149e6a;margin-top:10px;display:none}
.form-msg.show{display:block}

/* ---------- faq ---------- */
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:.24s;height:fit-content}
.faq-item:hover{border-color:rgba(15,59,255,.3);box-shadow:var(--shadow)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:17px 20px;background:none;border:none;cursor:pointer;font-family:inherit;
  font-size:14.5px;font-weight:600;color:var(--ink);text-align:left;
}
.faq-q i{
  font-style:normal;width:22px;height:22px;border-radius:7px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-size:14px;
  background:rgba(255,61,94,.1);color:var(--brand-deep);transition:transform .3s,background .25s;
}
.faq-item.open .faq-q i{transform:rotate(45deg);background:var(--brand);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 20px 18px;font-size:13.5px;color:var(--muted);line-height:1.75}

/* ---------- footer ---------- */
.site-footer{
  background:#141821;color:#c8cedd;padding:56px 0 0;margin-top:20px;
  border-top:1px solid rgba(255,255,255,.08);
}
.footer-top{display:grid;grid-template-columns:1.4fr .8fr .9fr 1fr;gap:34px;padding-bottom:40px}
.footer-brand .ai-page-logo{height:36px;margin-bottom:16px;filter:brightness(0) invert(1)}
.footer-brand p{font-size:13.5px;color:#9aa4b8;max-width:300px;line-height:1.75}
.footer-col h4{font-size:14.5px;color:#fff;margin-bottom:16px;font-weight:700}
.footer-col ul li{margin-bottom:9px}
.footer-col ul li a{font-size:13.5px;color:#9aa4b8;transition:color .2s}
.footer-col ul li a:hover{color:var(--brand)}
.footer-links-inline{display:flex;flex-wrap:wrap;gap:8px 16px}
.footer-links-inline a{font-size:13px;color:#9aa4b8;transition:color .2s}
.footer-links-inline a:hover{color:var(--brand)}
.footer-contact li{font-size:13.5px;color:#9aa4b8;margin-bottom:10px;word-break:break-all}
.footer-contact li a{color:#8ff3f5}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
}
.footer-bottom p{font-size:12.5px;color:#8b94a8}
.footer-bottom nav{display:flex;flex-wrap:wrap;gap:16px}
.footer-bottom nav a{font-size:12.5px;color:#8b94a8;transition:color .2s}
.footer-bottom nav a:hover{color:var(--brand)}

/* ---------- float ---------- */
.float-cs{
  position:fixed;right:20px;bottom:24px;z-index:90;
  display:flex;flex-direction:column;gap:10px;align-items:flex-end;
}
.float-btn{
  width:52px;height:52px;border-radius:16px;border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand),#ff7a4d);color:#fff;
  box-shadow:0 12px 26px rgba(255,61,94,.4);transition:transform .22s,box-shadow .22s;
}
.float-btn svg{width:23px;height:23px;fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.float-btn:hover{transform:translateY(-3px) scale(1.05);box-shadow:0 16px 34px rgba(255,61,94,.5)}
.float-btn.top{background:#fff;border:1.5px solid var(--line);opacity:0;pointer-events:none;transition:.3s}
.float-btn.top svg{stroke:var(--ink)}
.float-btn.top.show{opacity:1;pointer-events:auto}
.cs-pop{
  position:fixed;right:20px;bottom:92px;width:268px;z-index:91;
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;
  box-shadow:var(--shadow-lg);opacity:0;transform:translateY(10px) scale(.97);
  pointer-events:none;transition:.25s;
}
.cs-pop.show{opacity:1;transform:none;pointer-events:auto}
.cs-pop h4{font-size:15px;margin-bottom:12px}
.cs-pop img{width:100%;border-radius:11px;aspect-ratio:1;object-fit:cover;background:var(--bg);border:1px solid var(--line)}
.cs-pop p{font-size:12.5px;color:var(--muted);margin-top:11px;line-height:1.7}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-panel{max-width:560px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .solution-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .article-list{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:repeat(3,1fr)}
  .compare-wrap{grid-template-columns:1fr}
  .about-wrap{grid-template-columns:1fr;gap:32px}
  .form-wrap{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:860px){
  .nav-links{
    display:none;width:100%;flex-direction:column;align-items:stretch;
    order:4;padding:10px 0 14px;gap:2px;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:11px 14px;border-radius:10px}
  .menu-toggle{display:flex}
  .nav-inner{min-height:64px}
  .split{grid-template-columns:1fr}
  .faq-list{grid-template-columns:1fr}
}
@media (max-width:720px){
  section{padding:54px 0}
  .hero{padding:48px 0 56px}
  .card-grid{grid-template-columns:1fr}
  .solution-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .case-grid{grid-template-columns:1fr}
  .article-list{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .form-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr;gap:26px}
  .visual-row{grid-template-columns:1fr}
  .about-points{grid-template-columns:1fr}
  .net-list{grid-template-columns:1fr}
  .metric-grid{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .cs-pop{width:calc(100vw - 40px)}
}
@media (max-width:460px){
  .article-list{grid-template-columns:1fr}
  .metric-grid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
}