/* 酷视界官网样式 */
/* ============ Tokens ============ */
:root{
  --bg:#161A16;
  --bg-alt:#1B201B;
  --surface:#1F241F;
  --surface-2:#262C26;
  --line:#2C322C;
  --line-strong:#3A423A;
  --text:#F2F5F0;
  --text-2:#9BA69B;
  --text-3:#6C776D;
  --accent:#9EFF00;
  --ink:#141614;
  --ink-2:#2A3318;
  --light:#F1F3EE;
  --light-line:#D5DAD1;
  --light-text:#151A15;
  --light-text-2:#5A655A;
  --light-text-3:#7A8578;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  --mono:"Geist Mono","JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --maxw:1312px;
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--sans);font-size:16px;line-height:1.55;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
svg{display:block}
::selection{background:var(--accent);color:var(--ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.container{width:min(var(--maxw),calc(100% - 128px));margin-inline:auto}
.skip{position:absolute;left:-9999px;top:0;z-index:100;background:var(--accent);color:var(--ink);padding:10px 16px;font-size:13px}
.skip:focus{left:16px;top:12px}
section[id]{scroll-margin-top:76px}

/* ============ Shared type ============ */
.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:1.4px;color:var(--accent);text-transform:uppercase}
.section{padding:104px 0}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;margin-bottom:44px}
.section-head-main{max-width:760px;display:flex;flex-direction:column;gap:16px}
.section-title{margin:0;font-size:42px;line-height:1.34;font-weight:700;letter-spacing:-.5px}
.section-desc{margin:0;font-size:16px;line-height:1.75;color:var(--text-2);max-width:720px}
.section-note{font-size:13px;line-height:1.7;color:var(--text-3);text-align:right;max-width:260px;flex:none}
.light .eyebrow{color:#4A5548}
.light .section-title{color:var(--light-text)}
.light .section-desc{color:var(--light-text-2)}
.light .section-note{color:var(--light-text-2)}

/* ============ Buttons ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;padding:16px 26px;border-radius:6px;font-size:14px;font-weight:700;white-space:nowrap;transition:transform .18s ease,background .18s ease,border-color .18s ease,box-shadow .18s ease}
.btn svg{width:16px;height:16px;flex:none}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--accent);color:var(--ink)}
.btn-primary:hover{box-shadow:0 8px 24px rgba(158,255,0,.18)}
.btn-ghost{border:1px solid var(--line-strong);color:var(--text);font-weight:500}
.btn-ghost:hover{border-color:var(--text-2)}
.btn-dark{background:var(--ink);color:var(--accent);padding:19px 32px;font-size:15px}
.btn-dark:hover{box-shadow:0 10px 28px rgba(20,22,20,.22)}

/* ============ Nav ============ */
.nav{position:sticky;top:0;z-index:50;height:76px;background:rgba(22,26,22,.88);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.nav-inner{height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand-mark{width:26px;height:26px;flex:none}
.brand-text{display:flex;flex-direction:column;gap:2px;line-height:1}
.brand-cn{font-size:17px;font-weight:700;letter-spacing:.5px}
.brand-en{font-family:var(--mono);font-size:9px;letter-spacing:1.4px;color:var(--text-3)}
.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{font-size:13px;font-weight:500;color:var(--text-2);transition:color .18s ease}
.nav-links a:hover,.nav-links a.is-active{color:var(--accent)}
.nav-links a.is-active{font-weight:600}
.nav-actions{display:flex;align-items:center;gap:12px;flex:none}
.nav-cta{padding:11px 18px;font-size:13px;gap:8px}
.nav-cta svg{width:14px;height:14px}
.nav-toggle{display:none;width:40px;height:40px;border:1px solid var(--line-strong);border-radius:6px;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:16px;height:1.5px;background:var(--text);transition:transform .2s ease,opacity .2s ease}
.nav.is-open .nav-toggle span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav.is-open .nav-toggle span:nth-child(2){opacity:0}
.nav.is-open .nav-toggle span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* ============ Hero ============ */
.hero{padding:92px 0 96px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:600px minmax(0,1fr);gap:56px;align-items:start}
.hero-copy{display:flex;flex-direction:column;gap:26px;align-items:flex-start}
.hero-eyebrow{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:11px;letter-spacing:1.6px;color:var(--accent)}
.hero-eyebrow i{width:8px;height:8px;background:var(--accent);display:block;flex:none}
.hero h1{margin:0;font-size:62px;line-height:1.29;font-weight:700;letter-spacing:-1px}
.hero h1 span{display:block}
.hero-sub{margin:0;max-width:540px;font-size:17px;line-height:1.76;color:var(--text-2)}
.hero-buttons{display:flex;gap:14px;flex-wrap:wrap}
.hero-trust{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:11px;letter-spacing:.4px;color:var(--text-3)}
.hero-trust i{width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none}
.hero-visual{border:1px solid var(--line);background:var(--surface)}
.hero-img-wrap{height:430px;overflow:hidden;position:relative}
.hero-img-wrap img{width:100%;height:100%;object-fit:cover;transform:scale(1.2);transform-origin:center}
.hero-cap{height:46px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 18px;background:var(--surface);font-size:11px}
.hero-cap span:first-child{color:var(--text-2)}
.hero-cap span:last-child{font-family:var(--mono);letter-spacing:1px;color:var(--accent)}

/* ============ Platform strip ============ */
.platforms{background:var(--bg-alt);border-bottom:1px solid var(--line)}
.platforms-inner{height:104px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.platforms-label{display:flex;flex-direction:column;gap:6px;flex:none}
.platforms-label small{font-family:var(--mono);font-size:10px;letter-spacing:1.2px;color:var(--text-3)}
.platforms-label strong{font-size:15px;font-weight:600}
.chips{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.chip{padding:9px 20px;border:1px solid var(--line-strong);border-radius:100px;font-size:13px;font-weight:500;color:#C8D0C6;transition:border-color .18s ease,color .18s ease}
.chip:hover{border-color:var(--accent);color:var(--accent)}
.platforms-note{font-size:12px;color:var(--text-3);flex:none}

/* ============ Business bento ============ */
.biz-grid{display:grid;grid-template-columns:minmax(0,2.13fr) minmax(0,1fr);gap:20px}
.card{background:var(--surface);border:1px solid var(--line)}
.card-index{font-family:var(--mono);font-size:11px;letter-spacing:1.2px;color:var(--accent)}
.card-title{margin:0;font-size:32px;line-height:1.38;font-weight:700}
.card-desc{margin:0;font-size:15px;line-height:1.73;color:var(--text-2)}
.biz-main{height:400px;padding:36px;display:grid;grid-template-columns:460px minmax(0,1fr);gap:28px}
.biz-main-copy{display:flex;flex-direction:column;gap:16px;align-items:flex-start}
.tags{display:flex;gap:8px;flex-wrap:wrap}
.tag{padding:7px 12px;background:var(--surface-2);font-size:12px;font-weight:500;color:#E4EAE1}
.text-link{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--accent);transition:gap .18s ease}
.text-link:hover{gap:14px}
.text-link svg{width:14px;height:14px}
.biz-media{height:328px;overflow:hidden;border:1px solid var(--line)}
.biz-media img{width:100%;height:100%;object-fit:cover;transform:scale(1.14);transform-origin:center}
.biz-tech{height:400px;padding:32px;display:flex;flex-direction:column;gap:18px}
.icon-box{width:36px;height:36px}
.biz-tech .card-index{color:var(--text-3);font-size:10px}
.biz-tech .card-title{font-size:28px}
.biz-tech .card-desc{font-size:14px;line-height:1.7}
.dev-list{margin-top:auto;display:flex;flex-direction:column;gap:10px}
.dev-list span{font-size:13px;font-weight:500;color:#C8D0C6}
.biz-wide{grid-column:1/-1;height:300px;padding:36px;display:grid;grid-template-columns:420px minmax(0,1fr);gap:40px}
.biz-wide-copy{display:flex;flex-direction:column;gap:16px;align-items:flex-start}
.biz-wide .card-desc{max-width:400px}
.funnel{display:flex;flex-direction:column;gap:12px}
.funnel-label{font-family:var(--mono);font-size:10px;letter-spacing:1.2px;color:var(--text-3)}
.funnel-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.funnel-step{height:112px;padding:16px;background:var(--surface-2);border:1px solid var(--line);display:flex;flex-direction:column;gap:8px}
.funnel-step b{font-family:var(--mono);font-size:18px;font-weight:500;color:var(--accent);line-height:1}
.funnel-step span{font-size:14px;font-weight:600;line-height:1.5}

/* ============ Process (light) ============ */
.light{background:var(--light);color:var(--light-text)}
.process-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}
.process-step{min-height:260px;padding:8px 24px;display:flex;flex-direction:column;gap:14px}
.process-step+.process-step{border-left:1px solid var(--light-line)}
.process-step .num{font-family:var(--mono);font-size:44px;font-weight:500;line-height:1.27;letter-spacing:-1px}
.process-step h3{margin:0;font-size:20px;line-height:1.5;font-weight:600}
.process-step p{margin:0;font-size:14px;line-height:1.7;color:var(--light-text-2)}
.process-step .deliver{margin-top:auto;font-family:var(--mono);font-size:10px;letter-spacing:.8px;color:var(--light-text-3)}

/* ============ Cases ============ */
.stats{height:150px;background:var(--bg-alt);display:flex;align-items:center;padding:0 36px}
.stat{flex:1;padding:0 28px;display:flex;flex-direction:column;gap:6px}
.stat+.stat{border-left:1px solid var(--line)}
.stat b{font-family:var(--mono);font-size:44px;font-weight:500;line-height:1.23}
.stat span{font-size:12px;color:var(--text-3)}
.case-grid{display:grid;grid-template-columns:1.12fr .97fr 1fr;gap:20px;margin-top:20px}
.case-card{min-height:262px;padding:28px;display:flex;flex-direction:column;gap:12px}
.case-card .kind{font-family:var(--mono);font-size:10px;letter-spacing:1px;color:var(--text-3)}
.case-card h3{margin:0;font-size:18px;line-height:1.55;font-weight:600}
.case-card p{margin:0;font-size:13px;line-height:1.7;color:var(--text-2)}
.case-metric{margin-top:auto;display:flex;align-items:baseline;gap:8px}
.case-metric b{font-family:var(--mono);font-size:30px;font-weight:500;line-height:1}
.case-metric span{font-size:12px;color:var(--text-3)}

/* ============ FAQ (light) ============ */
.faq-list{border-top:1px solid var(--light-line)}
.faq-item{border-bottom:1px solid var(--light-line)}
.faq-item summary{list-style:none;display:grid;grid-template-columns:40px minmax(0,1fr) 20px;gap:24px;align-items:start;padding:22px 0;cursor:pointer}
.faq-item summary::-webkit-details-marker{display:none}
.faq-no{font-family:var(--mono);font-size:12px;font-weight:500;color:#4A5548;padding-top:4px}
.faq-q{font-size:17px;font-weight:600;line-height:1.55}
.faq-toggle{position:relative;width:16px;height:16px;margin-top:5px;justify-self:end}
.faq-toggle::before,.faq-toggle::after{content:"";position:absolute;background:var(--light-text-2);transition:transform .2s ease,opacity .2s ease}
.faq-toggle::before{left:0;top:7.5px;width:16px;height:1.5px}
.faq-toggle::after{left:7.5px;top:0;width:1.5px;height:16px}
.faq-item[open] .faq-toggle::after{transform:rotate(90deg);opacity:0}
.faq-a{margin:0 0 22px 64px;font-size:14px;line-height:1.7;color:var(--light-text-2);max-width:900px}
.faq-item summary:hover .faq-q{color:#2E5A1F}

/* ============ CTA / Booking ============ */
.cta{background:var(--accent);color:var(--ink)}
.cta-inner{min-height:360px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,560px);gap:64px;align-items:center;padding:80px 0}
.cta-copy{display:flex;flex-direction:column;gap:20px}
.cta-copy .eyebrow{color:var(--ink)}
.cta-copy h2{margin:0;font-size:46px;line-height:1.35;font-weight:700;letter-spacing:-1px}
.cta-copy p{margin:0;font-size:16px;line-height:1.75;color:var(--ink-2)}
.cta-points{display:flex;flex-direction:column;gap:10px;margin-top:8px;padding:0;list-style:none}
.cta-points li{display:flex;align-items:center;gap:10px;font-size:13px;line-height:1.6;color:var(--ink-2)}
.cta-points li::before{content:"";width:6px;height:6px;background:var(--ink);flex:none}
.cta-panel{background:var(--ink);color:var(--text);border:1px solid #0B0D0B;padding:32px}
.form-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:22px}
.form-head h3{margin:0;font-size:22px;font-weight:700;line-height:1.4}
.form-kicker{font-family:var(--mono);font-size:10px;letter-spacing:1.2px;color:var(--accent);white-space:nowrap}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field-full{grid-column:1/-1}
.field label{font-size:12px;font-weight:500;color:var(--text-2)}
.field input,.field select,.field textarea{
  width:100%;padding:11px 12px;background:#101310;border:1px solid var(--line-strong);border-radius:4px;
  color:var(--text);font-family:inherit;font-size:13px;line-height:1.6;outline:none;transition:border-color .16s ease;
}
.field textarea{resize:vertical;min-height:76px}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--accent)}
.field select{appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%239BA69B' stroke-width='1.5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:34px}
.form-note{margin:12px 0 0;font-size:12px;line-height:1.7;color:var(--accent)}
.form-note:empty{display:none}
.form-note.is-error{color:#FFB4A6}
.form-submit{width:100%;margin-top:16px;border-radius:4px;padding:15px 22px}
.form-fine{margin:12px 0 0;font-size:11px;line-height:1.7;color:var(--text-3)}
.booking-success{display:flex;flex-direction:column;align-items:flex-start;gap:12px;padding:10px 0}
.ok-mark{width:46px;height:46px;border:1px solid var(--accent);display:flex;align-items:center;justify-content:center;color:var(--accent)}
.booking-success h3{margin:6px 0 0;font-size:26px;line-height:1.4;font-weight:700}
.booking-success p{margin:0;font-size:14px;line-height:1.75;color:var(--text-2)}
.success-id{font-family:var(--mono);font-size:12px;letter-spacing:1px;color:var(--accent)}
.success-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.success-actions .btn{padding:12px 20px;border-radius:4px;font-size:13px}
.empty{padding:36px 20px;text-align:center;font-size:13px;color:var(--text-3);grid-column:1/-1}
.light .empty{color:var(--light-text-2)}

/* ============ Footer ============ */
.footer{background:var(--bg);border-top:1px solid var(--line)}
.footer-main{display:grid;grid-template-columns:420px repeat(3,200px);gap:80px;padding:72px 0}
.footer-brand{display:flex;flex-direction:column;gap:16px}
.footer-brand .brand-row{display:flex;align-items:center;gap:12px}
.footer-brand p{margin:0;font-size:13px;line-height:1.7;color:var(--text-2)}
.footer-brand .muted{font-size:12px;color:var(--text-3)}
.footer-brand .mono-note{font-family:var(--mono);font-size:10px;letter-spacing:1.2px;color:var(--text-3)}
.footer-col{display:flex;flex-direction:column;gap:14px}
.footer-col h4{margin:0;font-size:12px;font-weight:600;line-height:1.7}
.footer-col a{font-size:13px;line-height:1.55;color:var(--text-3);transition:color .18s ease}
.footer-col a:hover{color:var(--text)}
.footer-col a.hot{color:var(--accent)}
.footer-bottom{height:76px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:11px;color:var(--text-3)}
.footer-bottom span:first-child{font-family:var(--mono)}
.footer-bottom .admin-link{color:var(--text-2);transition:color .18s ease}
.footer-bottom .admin-link:hover{color:var(--accent)}

/* ============ Reveal ============ */
[data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
[data-reveal].in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}
  [data-reveal]{opacity:1;transform:none}
}

/* ============ Responsive ============ */
@media (max-width:1180px){
  .container{width:calc(100% - 64px)}
  .hero-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:36px}
  .hero h1{font-size:clamp(40px,4.6vw,62px)}
  .biz-main,.biz-wide{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .biz-main-copy{max-width:none}
  .biz-grid{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr)}
  .footer-main{grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));gap:40px}
  .cta-inner{grid-template-columns:minmax(0,1fr) minmax(0,480px);gap:40px}
}
@media (max-width:900px){
  .nav-toggle{display:flex}
  .nav-links{
    position:absolute;top:76px;left:0;right:0;display:none;flex-direction:column;align-items:stretch;
    gap:0;padding:8px 32px 24px;background:rgba(22,26,22,.98);border-bottom:1px solid var(--line);
  }
  .nav.is-open .nav-links{display:flex}
  .nav-links a{padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}
  .nav-cta{display:none}
  .platforms-inner{height:auto;padding:24px 0;flex-wrap:wrap;justify-content:flex-start;gap:18px}
  .platforms-note{display:none}
  .chips{gap:10px}
  .section{padding:80px 0}
  .section-title{font-size:34px}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px}
  .section-note{text-align:left}
  .biz-grid{grid-template-columns:1fr}
  .biz-main,.biz-tech,.biz-wide{height:auto;min-height:0}
  .biz-media{height:300px}
  .biz-tech .dev-list{margin-top:8px}
  .case-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .process-grid{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:32px}
  .process-step:nth-child(3){border-left:0}
  .process-step{min-height:0;padding:8px 20px}
  .footer-main{grid-template-columns:repeat(3,minmax(0,1fr));gap:40px}
  .footer-brand{grid-column:1/-1}
  .cta-inner{grid-template-columns:1fr;align-items:start;gap:36px;padding:64px 0}
  .cta-copy h2{font-size:36px}
  .cta-panel{max-width:640px;width:100%}
}
@media (max-width:640px){
  .container{width:calc(100% - 40px)}
  .hero{padding:64px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:clamp(36px,9vw,48px);line-height:1.28}
  .hero-sub{font-size:15px}
  .hero-img-wrap{height:280px}
  .hero-buttons .btn{flex:1;min-width:100%}
  .hero-trust{font-size:10px;flex-wrap:wrap}
  .section{padding:64px 0}
  .section-title{font-size:30px;line-height:1.35}
  .section-desc{font-size:15px}
  .biz-main,.biz-wide,.biz-tech{padding:24px;grid-template-columns:1fr;gap:24px}
  .biz-wide{gap:32px}
  .biz-media{height:240px}
  .funnel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .card-title{font-size:28px}
  .process-grid{grid-template-columns:1fr;row-gap:0}
  .process-step{border-left:0!important;border-top:1px solid var(--light-line);padding:24px 0;min-height:0}
  .process-step .deliver{margin-top:8px}
  .stats{height:auto;padding:28px 0;flex-direction:column;align-items:stretch;gap:24px}
  .stat+.stat{border-left:0;border-top:1px solid var(--line);padding-top:24px}
  .stat{padding:0 8px}
  .stat b{font-size:36px}
  .case-grid{grid-template-columns:1fr}
  .case-card{min-height:0}
  .faq-item summary{grid-template-columns:32px minmax(0,1fr) 16px;gap:12px}
  .faq-a{margin-left:44px}
  .cta-copy h2{font-size:30px}
  .cta-inner{padding:56px 0;gap:28px}
  .cta-panel{padding:24px}
  .form-grid{grid-template-columns:1fr;gap:12px}
  .form-head{flex-direction:column;gap:6px;margin-bottom:18px}
  .form-head h3{font-size:20px}
  .footer-main{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .footer-bottom{height:auto;padding:24px 0;flex-direction:column;align-items:flex-start;gap:8px}
}