/* ============================================
   智呼科技 — Design System
   ============================================ */
:root{
  --bg:#ffffff;
  --bg-soft:#f6f8fc;
  --bg-tint:#eef3ff;
  --card:#ffffff;
  --line:#e4e9f2;
  --line-strong:#cfd8e8;

  --ink:#0d1424;
  --ink-2:#3c4763;
  --ink-3:#6b7794;
  --ink-4:#98a3ba;

  --brand:#2f5cff;
  --brand-2:#7b4dff;
  --brand-ink:#1b3fd1;
  --cyan:#00b8d4;
  --green:#12b76a;
  --amber:#f79009;
  --red:#e5484d;

  --grad:linear-gradient(120deg,#2f5cff 0%,#7b4dff 55%,#00b8d4 100%);
  --grad-soft:linear-gradient(120deg,rgba(47,92,255,.10),rgba(0,184,212,.10));

  --r-sm:8px; --r:14px; --r-lg:20px; --r-xl:28px;
  --sh-1:0 1px 2px rgba(13,20,36,.04),0 4px 14px rgba(13,20,36,.05);
  --sh-2:0 8px 30px rgba(13,20,36,.09);
  --sh-glow:0 12px 40px rgba(47,92,255,.22);

  --max:1180px;
  --nav-h:66px;
  --font:"Inter","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;

  --ease:cubic-bezier(.22,1,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px)}
body{
  font-family:var(--font);background:var(--bg);color:var(--ink);
  line-height:1.65;-webkit-font-smoothing:antialiased;
  font-size:16px;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}

/* ---------- layout ---------- */
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
section{position:relative}
.sec{padding:96px 0}
.sec-sm{padding:64px 0}
.bg-soft{background:var(--bg-soft)}
.bg-tint{background:var(--bg-tint)}
.head{max-width:720px;margin:0 auto 56px;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--brand-ink);background:rgba(47,92,255,.08);
  border:1px solid rgba(47,92,255,.18);padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(47,92,255,.15)}
h1,h2,h3,h4{line-height:1.2;font-weight:700;letter-spacing:-.02em;color:var(--ink)}
.h-xl{font-size:clamp(38px,5.4vw,64px);letter-spacing:-.035em}
.h-lg{font-size:clamp(30px,3.6vw,44px);letter-spacing:-.03em}
.h-md{font-size:clamp(21px,2.2vw,28px)}
.h-sm{font-size:19px}
.sub{font-size:18px;color:var(--ink-3);margin-top:18px}
.lead{font-size:19px;color:var(--ink-2)}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.mono{font-family:var(--mono);font-size:.92em}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:999px;font-weight:600;font-size:15.5px;
  border:1px solid transparent;cursor:pointer;transition:.22s cubic-bezier(.4,0,.2,1);
  white-space:nowrap;
}
.btn-p{background:var(--grad);color:#fff;box-shadow:var(--sh-glow)}
.btn-p:hover{transform:translateY(-2px);box-shadow:0 18px 46px rgba(47,92,255,.3)}
.btn-g{background:#fff;color:var(--ink);border-color:var(--line-strong);box-shadow:var(--sh-1)}
.btn-g:hover{border-color:var(--brand);color:var(--brand-ink);transform:translateY(-2px)}
.btn-w{background:#fff;color:var(--brand-ink);border-color:transparent}
.btn-w:hover{background:#fff;transform:translateY(-2px)}
.btn-lg{padding:16px 34px;font-size:17px}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-block{width:100%}
.link{display:inline-flex;align-items:center;gap:6px;color:var(--brand-ink);font-weight:600;transition:gap .2s}
.link:hover{gap:11px}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:100;
  background:rgba(255,255,255,.78);backdrop-filter:blur(18px) saturate(180%);
  border-bottom:1px solid transparent;transition:.3s;
}
.nav.solid{border-bottom-color:var(--line);background:rgba(255,255,255,.92)}
.nav-in{max-width:var(--max);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;gap:38px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;letter-spacing:-.02em;white-space:nowrap;flex:none}
.brand-mark{
  width:32px;height:32px;border-radius:9px;background:var(--grad);
  display:grid;place-items:center;box-shadow:0 4px 14px rgba(47,92,255,.35);
}
.brand-mark svg{width:18px;height:18px}
.nav-links{display:flex;gap:30px;margin-left:auto;font-size:15px;color:var(--ink-2);font-weight:500}
.nav-links a{position:relative;padding:4px 0;transition:color .2s}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--grad);transition:width .25s;border-radius:2px}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:12px}
.burger{display:none;width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:10px;cursor:pointer;padding:0;place-items:center}
.burger span{display:block;width:17px;height:1.8px;background:var(--ink);border-radius:2px;position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:17px;height:1.8px;background:var(--ink);border-radius:2px;transition:.25s}
.burger span::before{top:-6px}.burger span::after{top:6px}
.burger.on span{background:transparent}
.burger.on span::before{top:0;transform:rotate(45deg)}
.burger.on span::after{top:0;transform:rotate(-45deg)}
.mobile{display:none;border-top:1px solid var(--line);background:#fff;padding:14px 24px 22px}
.mobile.on{display:block}
.mobile a{display:block;padding:11px 0;color:var(--ink-2);font-weight:500;border-bottom:1px solid var(--bg-soft)}
.mobile .btn{margin-top:16px}

/* ---------- hero ---------- */
.hero{padding:calc(var(--nav-h) + 76px) 0 88px;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-2;
  background:
    radial-gradient(760px 400px at 12% -6%,rgba(47,92,255,.16),transparent 62%),
    radial-gradient(680px 380px at 88% 4%,rgba(123,77,255,.14),transparent 62%),
    radial-gradient(520px 320px at 50% 104%,rgba(0,184,212,.13),transparent 65%);
}
.hero::after{
  content:"";position:absolute;inset:0;z-index:-1;opacity:.4;
  background-image:linear-gradient(rgba(13,20,36,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(13,20,36,.045) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000,transparent 72%);
          mask-image:radial-gradient(circle at 50% 30%,#000,transparent 72%);
}
.hero-grid{display:grid;grid-template-columns:1.03fr .97fr;gap:64px;align-items:center}
.hero h1{margin-bottom:22px}
.hero .sub{font-size:20px;max-width:560px}
.hero-actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.trust{display:flex;align-items:center;gap:22px;margin-top:34px;flex-wrap:wrap}
.trust-stars{display:flex;gap:3px;color:var(--amber)}
.trust-txt{font-size:14px;color:var(--ink-3)}
.avatars{display:flex}
.avatars i{
  width:30px;height:30px;border-radius:50%;border:2px solid #fff;margin-left:-9px;
  display:grid;place-items:center;font-style:normal;font-size:12px;font-weight:700;color:#fff;
}
.avatars i:first-child{margin-left:0}

/* ---------- console mock ---------- */
.console{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);
  box-shadow:var(--sh-2);overflow:hidden;
}
.console-bar{display:flex;align-items:center;gap:8px;padding:13px 18px;border-bottom:1px solid var(--line);background:var(--bg-soft)}
.console-bar i{width:10px;height:10px;border-radius:50%;background:var(--line-strong)}
.console-bar i:nth-child(1){background:#ff5f57}.console-bar i:nth-child(2){background:#febc2e}.console-bar i:nth-child(3){background:#28c840}
.console-bar span{margin-left:8px;font-size:13px;color:var(--ink-3);font-family:var(--mono)}
.console-body{padding:22px;display:grid;gap:16px}
.cm-row{display:flex;align-items:center;gap:12px;padding:12px 14px;background:var(--bg-soft);border-radius:var(--r);font-size:14.5px}
.cm-dot{width:9px;height:9px;border-radius:50%;flex:none}
.cm-dot.ok{background:var(--green);box-shadow:0 0 0 4px rgba(18,183,106,.16);animation:pulse 2s infinite}
.cm-dot.wait{background:var(--amber);box-shadow:0 0 0 4px rgba(247,144,9,.16)}
.cm-dot.live{background:var(--brand);box-shadow:0 0 0 4px rgba(47,92,255,.16);animation:pulse 1.4s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}
.cm-row .k{color:var(--ink-3);min-width:82px;font-size:13px}
.cm-row .v{margin-left:auto;font-weight:600;color:var(--ink)}
.wave{display:flex;align-items:center;gap:3px;height:34px;margin-left:auto}
.wave i{width:3px;border-radius:2px;background:var(--brand);animation:wf .9s ease-in-out infinite}
@keyframes wf{0%,100%{height:7px}50%{height:26px}}
.cm-transcript{
  font-size:14.5px;color:var(--ink-2);background:var(--bg-soft);
  border-left:2px solid var(--brand);padding:12px 14px;border-radius:0 var(--r-sm) var(--r-sm) 0;
}
.cm-transcript b{color:var(--ink)}

/* 波形面板 */
.viz-panel{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--r);
  padding:13px 15px 11px;
}
.viz-head{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.viz-label{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;color:var(--ink-2)}
.viz-meta{font-size:11.5px;color:var(--ink-4);font-family:var(--mono)}
.viz-legend{display:flex;align-items:center;gap:16px;margin-top:9px}
.lg{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;color:var(--ink-3)}
.lg-dot{width:8px;height:8px;border-radius:2px;display:inline-block}
.lg-cust{background:var(--cyan)}
.lg-ai{background:var(--brand-2)}

/* 说话人分离对话行 */
.tr-line{display:flex;align-items:flex-start;gap:9px;margin-top:7px}
.tr-line:first-child{margin-top:0}
.tr-line b{
  flex:none;font-size:12px;font-weight:700;color:var(--ink-3);
  background:#fff;border:1px solid var(--line);border-radius:6px;padding:2px 7px;margin-top:1px;
}
.tr-line .typer{flex:1;min-width:0;line-height:1.6}
.float-badge{
  position:absolute;background:#fff;border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--sh-2);padding:12px 16px;display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;
}
.fb-1{top:-18px;right:8px;animation:float 5s ease-in-out infinite}
.fb-2{bottom:-20px;left:-14px;animation:float 6s ease-in-out infinite .8s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-11px)}}
.hero-vis{position:relative}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:8px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:30px 24px;text-align:center;box-shadow:var(--sh-1);transition:.25s}
.stat:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.stat b{display:block;font-size:clamp(30px,3.4vw,42px);font-weight:700;letter-spacing:-.03em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:14.5px;color:var(--ink-3);display:block;margin-top:6px}

/* ---------- cards / grid ---------- */
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:30px 28px;box-shadow:var(--sh-1);transition:.28s cubic-bezier(.4,0,.2,1);
  position:relative;overflow:hidden;
}
.card::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:var(--grad);-webkit-mask:linear-gradient(#000,#000) content-box,linear-gradient(#000,#000);
  -webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .28s;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--sh-2)}
.card:hover::before{opacity:1}
.card-ico{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;margin-bottom:18px;
  background:var(--grad-soft);border:1px solid rgba(47,92,255,.16);color:var(--brand-ink);
}
.card-ico svg{width:23px;height:23px}
.card p{color:var(--ink-3);font-size:15px;margin-top:10px}
.card .tag{
  display:inline-block;margin-top:16px;font-size:12.5px;font-weight:600;color:var(--brand-ink);
  background:rgba(47,92,255,.08);padding:4px 10px;border-radius:6px;
}
.card-feat .card-ico{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border:0}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:s}
.step{position:relative;padding-top:44px;counter-increment:s}
.step::before{
  content:counter(s,decimal-leading-zero);
  position:absolute;top:0;left:0;font-family:var(--mono);font-size:13px;font-weight:700;
  color:var(--brand);background:rgba(47,92,255,.09);border:1px solid rgba(47,92,255,.18);
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
}
.step::after{
  content:"";position:absolute;top:17px;left:44px;right:-22px;height:1px;
  background:linear-gradient(90deg,rgba(47,92,255,.28),transparent);
}
.step:last-child::after{display:none}
.step h4{margin-bottom:8px}
.step p{color:var(--ink-3);font-size:15px}

/* ---------- tabs ---------- */
.tabs{display:flex;gap:6px;background:var(--bg-soft);border:1px solid var(--line);padding:5px;border-radius:999px;width:fit-content;margin:0 auto 40px;flex-wrap:wrap;justify-content:center}
.tab{padding:9px 20px;border-radius:999px;border:0;background:transparent;font-weight:600;font-size:14.5px;color:var(--ink-3);cursor:pointer;transition:.22s}
.tab:hover{color:var(--ink)}
.tab.on{background:#fff;color:var(--brand-ink);box-shadow:var(--sh-1)}
.tab-panel{display:none;animation:fadeUp .4s ease both}
.tab-panel.on{display:block}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

/* ---------- metrics table ---------- */
.mtable{width:100%;border-collapse:collapse;font-size:15px;background:#fff;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1)}
.mtable th{background:var(--bg-soft);text-align:left;padding:14px 18px;font-weight:600;color:var(--ink-3);font-size:13.5px;border-bottom:1px solid var(--line)}
.mtable td{padding:16px 18px;border-bottom:1px solid var(--line)}
.mtable tr:last-child td{border-bottom:0}
.mtable td b{font-size:17px}
.mtable .up{color:var(--green);font-weight:600}
.mtable .dn{color:var(--red);font-weight:600}

/* ---------- code ---------- */
.code-shell{background:#0d1424;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2);font-family:var(--mono);font-size:14px}
.code-bar{display:flex;align-items:center;gap:7px;padding:12px 16px;background:#151d31;border-bottom:1px solid #222d45}
.code-bar i{width:10px;height:10px;border-radius:50%}
.code-bar .t{margin-left:10px;color:#7b8aa8;font-size:12.5px}
.code-bar .cp{margin-left:auto;color:#7b8aa8;font-size:12.5px;cursor:pointer;background:none;border:0;padding:2px 6px;border-radius:5px}
.code-bar .cp:hover{color:#fff;background:rgba(255,255,255,.08)}
.code-shell pre{padding:20px;overflow-x:auto;color:#c7d2e5;line-height:1.85;font-size:13.5px}
.tk-k{color:#c792ea}.tk-s{color:#a5e075}.tk-n{color:#f78c6c}.tk-f{color:#82aaff}.tk-c{color:#5c6a85;font-style:italic}

/* ---------- pricing ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start}
.price{background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);padding:34px 30px;box-shadow:var(--sh-1);position:relative;transition:.28s}
.price:hover{box-shadow:var(--sh-2)}
.price.hot{border-color:transparent;box-shadow:var(--sh-glow);transform:scale(1.02)}
.price.hot::before{
  content:"最受欢迎";position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:var(--grad);color:#fff;font-size:12.5px;font-weight:700;padding:6px 16px;border-radius:999px;
  box-shadow:0 6px 18px rgba(47,92,255,.35);
}
.price h4{font-size:19px}
.price .amt{display:flex;align-items:baseline;gap:4px;margin:20px 0 6px}
.price .amt b{font-size:44px;font-weight:700;letter-spacing:-.035em}
.price .amt span{color:var(--ink-4);font-size:15px}
.price .desc{color:var(--ink-3);font-size:14.5px;min-height:44px}
.price ul{list-style:none;margin:26px 0;display:grid;gap:12px}
.price li{display:flex;gap:11px;font-size:14.8px;color:var(--ink-2);align-items:flex-start}
.price li svg{width:19px;height:19px;flex:none;color:var(--green);margin-top:3px}
.price li.off{color:var(--ink-4)}
.price li.off svg{color:var(--line-strong)}
.price-foot{text-align:center;font-size:13px;color:var(--ink-4);margin-top:14px}

/* ---------- logo ---------- */
.logos{display:flex;flex-wrap:wrap;gap:14px 46px;justify-content:center;align-items:center;opacity:.62}
.logos span{font-size:20px;font-weight:700;letter-spacing:-.02em;color:var(--ink-2)}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto;display:grid;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:.22s}
.faq-item.open{border-color:var(--brand);box-shadow:var(--sh-1)}
.faq-q{width:100%;text-align:left;background:none;border:0;padding:20px 56px 20px 24px;cursor:pointer;font-weight:600;font-size:16.5px;position:relative}
.faq-q::after{
  content:"";position:absolute;right:24px;top:50%;width:10px;height:10px;
  border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:translateY(-70%) rotate(45deg);transition:transform .28s;
}
.faq-item.open .faq-q::after{transform:translateY(-20%) rotate(225deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
.faq-a p{padding:0 24px 22px;color:var(--ink-3);font-size:15.5px}

/* ---------- CTA / form ---------- */
.cta{background:linear-gradient(135deg,#0d1424 0%,#1a2547 55%,#2b1f5e 100%);border-radius:var(--r-xl);padding:60px;position:relative;overflow:hidden;color:#fff}
.cta::before{content:"";position:absolute;inset:0;background:radial-gradient(620px 320px at 82% 12%,rgba(47,92,255,.36),transparent 62%),radial-gradient(420px 260px at 10% 92%,rgba(0,184,212,.24),transparent 60%)}
.cta>*{position:relative;z-index:1}
.cta h2{color:#fff}
.cta p{color:#b8c3dc;margin-top:16px;max-width:560px;font-size:17.5px}
.cta-actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.cta-note{font-size:13.5px;color:#8492b0;margin-top:22px}

.form-card{background:#fff;border-radius:var(--r-xl);padding:34px;box-shadow:var(--sh-2)}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:7px;color:var(--ink-2)}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line-strong);border-radius:10px;
  background:#fff;transition:.2s;font-size:15px;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,92,255,.13)}
.field textarea{resize:vertical;min-height:104px}
.field .hint{font-size:12.5px;color:var(--ink-4);margin-top:6px}
.form-ok{display:none;text-align:center;padding:36px 12px}
.form-ok.on{display:block;animation:fadeUp .45s ease both}
.form-ok .tick{width:64px;height:64px;border-radius:50%;background:rgba(18,183,106,.12);display:grid;place-items:center;margin:0 auto 20px;color:var(--green)}

/* ---------- footer ---------- */
.footer{background:var(--bg-soft);border-top:1px solid var(--line);padding:64px 0 28px;margin-top:96px}
.f-cols{display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:40px}
.f-cols h5{font-size:13.5px;font-weight:700;color:var(--ink);margin-bottom:16px;letter-spacing:.02em}
.f-cols ul{list-style:none;display:grid;gap:11px}
.f-cols a{color:var(--ink-3);font-size:14.5px;transition:.2s}
.f-cols a:hover{color:var(--brand-ink)}
.f-about{color:var(--ink-3);font-size:14.5px;margin:16px 0 20px;max-width:300px}
.f-bot{margin-top:48px;padding-top:24px;border-top:1px solid var(--line);display:flex;justify-content:center;gap:16px;flex-wrap:wrap;font-size:13.5px;color:var(--ink-4);text-align:center}

/* ---------- reveal ---------- */
.rv{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.rv.in{opacity:1;transform:none}

/* ---------- 键盘焦点可见 ---------- */
:focus-visible{
  outline:3px solid var(--brand);
  outline-offset:3px;
  border-radius:4px;
}
.tab:focus-visible,.faq-q:focus-visible{outline-offset:2px}

/* ---------- 跳到主内容 ---------- */
.skip{
  position:absolute;top:-100px;left:16px;z-index:200;
  background:var(--ink);color:#fff;padding:12px 22px;border-radius:0 0 10px 10px;
  font-weight:600;font-size:15px;transition:top .2s;
}
.skip:focus{top:0}

/* ---------- 表单错误提示 ---------- */
.field .hint:empty{display:none}
.field .hint{color:var(--red);font-weight:500}
input[aria-invalid="true"]{border-color:var(--red) !important;box-shadow:0 0 0 3px rgba(229,72,77,.12)}

/* ---------- responsive ---------- */
@media(max-width:1000px){
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .stats,.g4,.steps,.f-cols{grid-template-columns:repeat(2,1fr)}
  .price-grid{grid-template-columns:1fr;max-width:460px;margin:0 auto}
  .price.hot{transform:none}
  .step::after{display:none}
  .cta{padding:40px 32px}
  .f-cols{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  .sec{padding:68px 0}
  .nav-links,.nav-cta .btn-g{display:none}
  .burger{display:grid}
  .g2,.g3,.stats,.g4,.steps,.f-cols{grid-template-columns:1fr}
  .hero-actions .btn,.cta-actions .btn{width:100%}
  .footer{margin-top:64px}
  .f-cols{grid-template-columns:1fr}
}
@media(max-width:430px){
  .nav-in{gap:10px;padding:0 16px}
  .brand{font-size:17px;gap:8px}
  .brand-mark{width:28px;height:28px;border-radius:8px}
  .brand-mark svg{width:16px;height:16px}
  .nav-cta{gap:8px}
  .nav-cta .btn-p{padding:8px 13px;font-size:13px}
  .burger{width:36px;height:36px}
  .wrap{padding:0 18px}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .rv{opacity:1;transform:none}
  /* 减弱动效时：波形保持静态中等高度，打字机直接显示全文 */
  .audio-viz i{transform:scaleY(.5);opacity:.4}
  .sp-wave i{transform:scaleY(.5)}
  .typer-caret{display:none}
  .marquee-track{animation:none}
}

/* ============================================
   增强模块 — 音频波形 / 极光 / 聚光 / 跑马灯
   ============================================ */

/* ---------- 滚动进度条 ---------- */
.scroll-prog{
  position:fixed;top:0;left:0;height:3px;width:0;z-index:150;
  background:var(--grad);border-radius:0 3px 3px 0;
  box-shadow:0 0 14px rgba(47,92,255,.55);
  transition:width .12s linear;
}

/* ---------- 首屏极光漂移 ---------- */
.aurora{
  position:absolute;inset:-15% -10%;z-index:-3;pointer-events:none;overflow:hidden;
}
.aurora span{
  position:absolute;border-radius:50%;filter:blur(90px);opacity:.55;
  will-change:transform;
}
.au-1{width:560px;height:560px;left:-8%;top:-14%;background:radial-gradient(circle,rgba(47,92,255,.55),transparent 68%);animation:au1 17s ease-in-out infinite}
.au-2{width:500px;height:500px;right:-6%;top:4%;background:radial-gradient(circle,rgba(123,77,255,.48),transparent 68%);animation:au2 21s ease-in-out infinite}
.au-3{width:460px;height:460px;left:40%;bottom:-22%;background:radial-gradient(circle,rgba(0,184,212,.42),transparent 68%);animation:au3 25s ease-in-out infinite}
@keyframes au1{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(60px,44px) scale(1.12)}}
@keyframes au2{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-52px,36px) scale(1.1)}}
@keyframes au3{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(38px,-40px) scale(1.14)}}

/* ---------- 音频波形可视化 ---------- */
.audio-viz{
  display:flex;align-items:stretch;gap:3px;height:56px;
  padding:0 4px;
}
.audio-viz i{
  flex:1 1 0;min-width:2px;height:100%;
  border-radius:2px;
  background-color:var(--brand);
  background-image:var(--grad);
  background-size:100% 100%;
  opacity:.5;
  transform-origin:center center;
  transform:scaleY(.14);
  animation:avz 1.15s ease-in-out infinite;
}
@keyframes avz{0%,100%{transform:scaleY(.14)}50%{transform:scaleY(1)}}
.audio-viz.paused i{animation-play-state:paused;opacity:.22}

/* 说话人波形（客户/AI 区分色） */
.sp-wave{display:flex;align-items:stretch;gap:2.5px;height:16px;flex:none;width:52px}
.sp-wave i{
  width:2.5px;height:100%;border-radius:2px;background:var(--cyan);opacity:.75;
  transform:scaleY(.3);transform-origin:center center;
  animation:spz .7s ease-in-out infinite;
}
.sp-wave.ai i{background:var(--brand-2)}
@keyframes spz{0%,100%{transform:scaleY(.3)}50%{transform:scaleY(1)}}

/* ---------- 聚光卡片（鼠标跟随高光） ---------- */
.spot{position:relative}
.spot::after{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:radial-gradient(260px circle at var(--mx,50%) var(--my,50%),
             rgba(47,92,255,.13),transparent 62%);
  opacity:0;transition:opacity .3s;
}
.spot:hover::after{opacity:1}

/* ---------- 标题渐变下划线 ---------- */
.head h2{position:relative;display:inline-block}
.head h2::after{
  content:"";position:absolute;left:50%;bottom:-14px;transform:translateX(-50%);
  width:56px;height:4px;border-radius:2px;background:var(--grad);
}

/* ---------- 按钮流光 ---------- */
.btn-p{position:relative;overflow:hidden}
.btn-p::after{
  content:"";position:absolute;top:0;left:-120%;width:55%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.42),transparent);
  transform:skewX(-20deg);transition:left .65s ease;
}
.btn-p:hover::after{left:130%}

/* ---------- Logo 跑马灯 ---------- */
.marquee{
  position:relative;overflow:hidden;margin-top:52px;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
          mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
}
.marquee-track{display:flex;width:max-content;animation:mq 34s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
.marquee-group{display:flex;align-items:center;gap:46px;padding-right:46px}
@keyframes mq{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.marquee-group span{font-size:20px;font-weight:700;letter-spacing:-.02em;color:var(--ink-2);opacity:.62;white-space:nowrap;transition:opacity .25s}
.marquee-group span:hover{opacity:1;color:var(--brand-ink)}

/* ---------- 打字机 ---------- */
.typer-caret{
  display:inline-block;width:2px;height:1em;vertical-align:-.14em;
  background:var(--brand);margin-left:2px;animation:blink 1s steps(2,start) infinite;
}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}

/* ---------- 徽章呼吸点 ---------- */
.live-dot{
  width:8px;height:8px;border-radius:50%;background:var(--green);flex:none;
  box-shadow:0 0 0 0 rgba(18,183,106,.55);animation:ripple 2.1s ease-out infinite;
}
@keyframes ripple{
  0%{box-shadow:0 0 0 0 rgba(18,183,106,.5)}
  70%{box-shadow:0 0 0 9px rgba(18,183,106,0)}
  100%{box-shadow:0 0 0 0 rgba(18,183,106,0)}
}

/* ---------- 数字卡片微光 ---------- */
.stat{position:relative;overflow:hidden}
.stat::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;
  transition:transform .4s var(--ease);
}
.stat:hover::before{transform:scaleX(1)}

/* ---------- 表格行高亮 ---------- */
.mtable tbody tr{transition:background .2s}
.mtable tbody tr:hover{background:var(--bg-soft)}

/* ---------- 价格卡顶部光条 ---------- */
.price{overflow:hidden}
.price::after{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--grad);transform:translateX(-100%);
  transition:transform .55s var(--ease);
}
.price:hover::after{transform:translateX(0)}
.price.hot::after{transform:translateX(0)}

/* ---------- 自定义滚动条 ---------- */
::-webkit-scrollbar{width:11px;height:11px}
::-webkit-scrollbar-track{background:var(--bg-soft)}
::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:6px;border:2px solid var(--bg-soft)}
::-webkit-scrollbar-thumb:hover{background:var(--ink-4)}

/* ---------- 响应式补充 ---------- */
@media(max-width:760px){
  .aurora{inset:-8% -20%}
  .au-1,.au-2,.au-3{filter:blur(70px)}
  .head h2::after{bottom:-10px}
  .marquee-group{gap:30px;padding-right:30px}
  .marquee-group span{font-size:17px}
}