/* Grok Bot Webinar — Night Command (styleboard 02) */
:root{
  --void:#05070D; --deck:#0D1322; --line:#1E2A45; --cyan:#3BE8FF; --violet:#8A5CFF; --text:#E8EEFF;
  --dim:#8794B3; --body:#B9C3DD; --violet-l:#B59BFF; --err:#FF6B8B;
  --disp:"Unbounded","Noto Sans TC",sans-serif; --tc:"Noto Sans TC",system-ui,sans-serif; --mono:"JetBrains Mono","Noto Sans TC",monospace;
  --wrap:1180px; --r:6px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{background:var(--void);color:var(--text);font-family:var(--tc);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden;
  background-image:radial-gradient(900px 560px at 80% 6%,rgba(138,92,255,.16),transparent 60%),radial-gradient(700px 500px at 0% 60%,rgba(59,232,255,.06),transparent 60%);background-repeat:no-repeat}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:-1;
  background-image:linear-gradient(rgba(30,42,69,.32) 1px,transparent 1px),linear-gradient(90deg,rgba(30,42,69,.32) 1px,transparent 1px);background-size:40px 40px;
  mask-image:radial-gradient(ellipse at 50% 0%,#000 30%,transparent 80%)}
a{color:inherit;text-decoration:none}
svg{flex:none}
ul,ol{list-style:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:12px;top:-60px;background:var(--cyan);color:var(--void);padding:8px 14px;border-radius:4px;z-index:100;font-weight:700}
.skip:focus{top:12px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 32px}

/* buttons */
.btn{font-family:var(--tc);font-weight:700;font-size:16px;letter-spacing:.04em;padding:14px 26px;border-radius:4px;display:inline-flex;align-items:center;justify-content:center;gap:10px;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:box-shadow .2s,transform .2s,background .2s}
.btn svg{width:17px;height:17px}
.btn-primary{background:var(--cyan);color:var(--void);box-shadow:0 0 0 1px var(--cyan),0 0 26px rgba(59,232,255,.45)}
.btn-primary:hover{box-shadow:0 0 0 1px var(--cyan),0 0 40px rgba(59,232,255,.75);transform:translateY(-1px)}
.btn-primary:hover svg{transform:translateX(2px)}
.btn-primary svg{transition:transform .2s}
.btn-ghost{border-color:var(--violet);color:var(--text);background:rgba(138,92,255,.10);font-weight:500}
.btn-ghost:hover{background:rgba(138,92,255,.22)}
.btn-outline{border-color:var(--cyan);color:var(--cyan);padding:8px 16px;font-size:14px}
.btn-outline:hover{background:rgba(59,232,255,.1)}
.btn-block{width:100%}

/* panel w/ HUD corners */
.panel{background:rgba(13,19,34,.82);border:1px solid var(--line);border-radius:var(--r);position:relative}
.panel::before,.panel::after{content:"";position:absolute;width:12px;height:12px;border:1.5px solid var(--cyan);pointer-events:none}
.panel::before{top:-1px;left:-1px;border-right:0;border-bottom:0;border-top-left-radius:var(--r)}
.panel::after{bottom:-1px;right:-1px;border-left:0;border-top:0;border-bottom-right-radius:var(--r)}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(5,7,13,.78);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;height:66px;gap:24px}
.logo{font-family:"Unbounded",sans-serif;font-weight:700;font-size:15px;letter-spacing:.08em;display:inline-flex;align-items:center;gap:10px;white-space:nowrap}
.logo i{width:16px;height:16px;border:2px solid var(--cyan);border-radius:50%;display:block;box-shadow:0 0 10px var(--cyan),inset 0 0 6px var(--cyan)}
.logo small{font-family:var(--mono);font-weight:400;font-size:11px;color:var(--dim);letter-spacing:.14em}
.nav nav{margin-left:auto}
.nav-links{display:flex;gap:30px;font-size:14px;color:var(--dim)}
.nav-links a:hover{color:var(--text)}

/* hero */
.hero{padding:72px 0 88px}
.hero-in{display:grid;grid-template-columns:1fr minmax(0,470px);gap:40px;align-items:center}
.live{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:13px;letter-spacing:.1em;color:var(--cyan);border:1px solid rgba(59,232,255,.35);padding:7px 14px;border-radius:4px;background:rgba(59,232,255,.06);margin-bottom:26px}
.live i{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px var(--cyan);animation:blink 2s ease-in-out infinite}
.hl{font-weight:900;font-size:clamp(42px,6.2vw,80px);line-height:1.1;letter-spacing:.01em}
.hl em{font-style:normal;background:linear-gradient(90deg,var(--cyan),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 18px rgba(59,232,255,.35))}
.sub{font-size:clamp(16px,1.4vw,18px);line-height:1.8;color:var(--body);font-weight:300;margin:24px 0 32px;max-width:540px}
.ctas{display:flex;gap:14px;flex-wrap:wrap}
.chips{display:flex;gap:10px;flex-wrap:wrap;margin-top:28px}
.chips li{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;padding:6px 12px;border:1px solid var(--line);border-radius:4px;background:rgba(13,19,34,.7)}
.chips svg{width:15px;height:15px;color:var(--cyan)}

/* network */
.net{position:relative;width:100%;aspect-ratio:420/370;--ic:52px}
.net-lines{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.orbit{transform-origin:210px 175px;animation:spin 60s linear infinite}
.core{position:absolute;left:50%;top:47.3%;transform:translate(-50%,-50%);width:23%;aspect-ratio:1;border-radius:50%;display:grid;place-items:center;text-align:center;
  background:radial-gradient(circle,#13203B,#0A0F1C);border:1.5px solid var(--cyan);box-shadow:0 0 40px rgba(59,232,255,.45)}
.core::before,.core::after{content:"";position:absolute;inset:-1px;border-radius:50%;border:1px solid rgba(59,232,255,.5);animation:ring 3.2s ease-out infinite}
.core::after{animation-delay:1.6s}
.core b{font-weight:900;font-size:clamp(20px,2.4vw,28px);line-height:1;display:block}
.core small{font-family:var(--mono);font-size:9px;color:var(--cyan);letter-spacing:.14em;display:block;margin-top:5px}
.node{position:absolute;left:var(--x);top:var(--y);transform:translate(-50%,calc(var(--ic) / -2));display:flex;flex-direction:column;align-items:center;gap:6px}
.node .ic{width:var(--ic);height:var(--ic);border-radius:12px;border:1px solid rgba(59,232,255,.5);background:#0A1222;display:grid;place-items:center;box-shadow:0 0 18px rgba(59,232,255,.18)}
.node .ic svg{width:44%;height:44%;color:var(--cyan);stroke-width:1.75}
.node .nm{font-size:13px;font-weight:500;white-space:nowrap}
.node .ss{font-family:var(--tc);font-size:11px;color:var(--cyan);margin-top:-5px;display:inline-flex;align-items:center;gap:5px;white-space:nowrap}
.node .ss::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor;box-shadow:0 0 6px currentColor;animation:blink 2.4s ease-in-out infinite}
.node.v .ic{border-color:rgba(138,92,255,.7);box-shadow:0 0 18px rgba(138,92,255,.3)} .node.v .ic svg,.node.v .ss{color:var(--violet-l)}
.node.idle .ic{border-color:var(--line);box-shadow:none} .node.idle .ic svg,.node.idle .ss{color:var(--dim)}
.node.idle .ss::before{background:none;border:1px solid currentColor;box-shadow:none;animation:none}

/* sections */
.section{padding:88px 0;border-top:1px solid rgba(30,42,69,.6)}
.sec-head{margin-bottom:40px}
.eyebrow{font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;color:var(--cyan);margin-bottom:12px}
h2{font-weight:900;font-size:clamp(30px,3.6vw,44px);line-height:1.2;letter-spacing:.01em}
.lead{font-size:17px;color:var(--body);font-weight:300;margin-top:12px;max-width:560px}

/* learn */
.learn{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:s}
.learn li{padding:26px 24px 28px;display:flex;flex-direction:column;gap:14px;transition:border-color .2s,transform .2s}
.learn li:hover{border-color:rgba(59,232,255,.45);transform:translateY(-3px)}
.step{font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;color:var(--dim)}
.l-ic{width:46px;height:46px;border-radius:10px;display:grid;place-items:center;border:1px solid rgba(59,232,255,.4);background:rgba(59,232,255,.05)}
.l-ic svg{width:22px;height:22px;color:var(--cyan);stroke-width:1.75}
.learn li:nth-child(even) .l-ic{border-color:rgba(138,92,255,.6);background:rgba(138,92,255,.08)}
.learn li:nth-child(even) .l-ic svg{color:var(--violet-l)}
.learn h3{font-size:19px;font-weight:700;line-height:1.35}
.learn p{font-size:15px;color:var(--body);font-weight:300;line-height:1.75}

/* who + speaker */
.who-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:56px;align-items:start}
.who{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.who li{display:flex;gap:18px;align-items:flex-start;padding:22px 0;border-bottom:1px solid var(--line)}
.w-ic{width:42px;height:42px;border-radius:50%;border:1px solid rgba(59,232,255,.4);display:grid;place-items:center;flex:none}
.w-ic svg{width:19px;height:19px;color:var(--cyan);stroke-width:1.75}
.who h3{font-size:18px;font-weight:700}
.who p{font-size:15px;color:var(--body);font-weight:300;margin-top:2px}
.speaker{padding:30px 30px 28px;margin-top:6px}
.spk{display:flex;gap:20px;align-items:center;margin-top:8px}
.avatar{width:96px;height:96px;border-radius:8px;border:1px solid var(--violet);display:grid;place-items:center;flex:none;background:repeating-linear-gradient(0deg,rgba(138,92,255,.12) 0 2px,transparent 2px 4px)}
.avatar svg{width:40px;height:40px;color:var(--violet-l);stroke-width:1.5}
.spk h3{font-family:"Unbounded",sans-serif;font-weight:700;font-size:24px;letter-spacing:.06em;margin-bottom:4px}
.spk p{font-size:15px;color:var(--body);line-height:1.6}
.spk-link{display:inline-flex;align-items:center;gap:8px;margin-top:16px;color:var(--cyan);font-weight:700;font-size:15px}
.spk-link svg{width:16px;height:16px;transition:transform .2s}.spk-link:hover svg{transform:translateX(3px)}
.spk-note{font-size:14px;color:var(--dim);margin-top:22px;padding-top:18px;border-top:1px dashed var(--line)}

/* register */
.register{background:radial-gradient(700px 400px at 20% 50%,rgba(59,232,255,.07),transparent 70%)}
.reg-grid{display:grid;grid-template-columns:1fr minmax(0,520px);gap:56px;align-items:center}
.cd{display:inline-flex;align-items:center;gap:14px;font-family:var(--mono);border:1px solid rgba(59,232,255,.35);border-radius:4px;padding:12px 18px;background:rgba(59,232,255,.05);margin-top:30px}
.cd .k{font-size:11.5px;color:var(--cyan);letter-spacing:.16em}
.cd .v{font-size:26px;font-weight:700;letter-spacing:.08em}
.cd .v small{font-family:var(--tc);color:var(--dim);font-size:13px;font-weight:400;margin:0 10px 0 4px;letter-spacing:0}
.form-panel{padding:32px}
.field{margin-bottom:18px}
.field label{display:flex;align-items:center;gap:8px;font-size:14.5px;font-weight:500;margin-bottom:8px}
.opt{font-family:var(--mono);font-size:11px;color:var(--dim);border:1px solid var(--line);padding:1px 6px;border-radius:3px;font-weight:400}
.inp{display:flex;align-items:center;gap:10px;height:50px;border:1px solid var(--line);border-radius:4px;background:#070B16;padding:0 14px;transition:border-color .2s,box-shadow .2s}
.inp .pr{font-family:var(--mono);font-size:14px;color:var(--cyan);flex:none}
.inp input{flex:1;min-width:0;height:100%;background:none;border:0;outline:0;color:var(--text);font-family:var(--mono),var(--tc);font-size:16px}
.inp input::placeholder{color:#4F5B78}
.inp:focus-within{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(59,232,255,.14),0 0 18px rgba(59,232,255,.15)}
.field.invalid .inp{border-color:var(--err);box-shadow:0 0 0 3px rgba(255,107,139,.12)}
.help{font-size:12.5px;color:var(--dim);margin-top:6px}
.err{font-size:13px;color:var(--err);margin-top:6px;min-height:0}
.err:empty{display:none}
.form-panel .btn-block{margin-top:8px;padding:16px}
.demo-note{font-size:12.5px;color:var(--dim);margin-top:14px;line-height:1.6}
.success{text-align:center;padding:16px 4px}
.success:focus{outline:none}
.ok-ic{width:64px;height:64px;border-radius:50%;display:grid;place-items:center;margin:0 auto 18px;border:1.5px solid var(--cyan);box-shadow:0 0 30px rgba(59,232,255,.35)}
.ok-ic svg{width:30px;height:30px;color:var(--cyan)}
.success h3{font-size:22px;font-weight:900}
.success p{color:var(--body);margin-top:10px;font-size:15px;overflow-wrap:anywhere}
.success .btn{margin-top:22px}

/* faq */
.faq-wrap{display:grid;grid-template-columns:1fr 2fr;gap:56px;align-items:start}
.faq-wrap .sec-head{margin-bottom:0}
.faq{display:flex;flex-direction:column;gap:12px}
.faq details{padding:0}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 24px;font-size:17px;font-weight:700}
.faq summary::-webkit-details-marker{display:none}
.faq summary svg{width:20px;height:20px;color:var(--cyan);transition:transform .25s}
.faq details[open] summary svg{transform:rotate(180deg)}
.faq details[open]{border-color:rgba(59,232,255,.35)}
.faq details p{padding:0 24px 22px;color:var(--body);font-weight:300;font-size:15.5px}

/* footer */
.foot{border-top:1px solid var(--line);padding:34px 0 40px}
.foot-in{display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.foot p{font-size:13px;color:var(--dim);margin-right:auto}

/* motion */
@keyframes blink{0%,100%{opacity:1}50%{opacity:.35}}
@keyframes ring{0%{transform:scale(1);opacity:.7}100%{transform:scale(1.7);opacity:0}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.hero-copy>*{animation:rise .7s cubic-bezier(.2,.7,.2,1) both}
.hero-copy>*:nth-child(2){animation-delay:.08s}.hero-copy>*:nth-child(3){animation-delay:.16s}.hero-copy>*:nth-child(4){animation-delay:.24s}.hero-copy>*:nth-child(5){animation-delay:.32s}
.net{animation:rise 1s .2s cubic-bezier(.2,.7,.2,1) both}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .pulses{display:none}
}

/* responsive */
@media (max-width:1080px){
  .learn{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .hero{padding:48px 0 64px}
  .hero-in{grid-template-columns:1fr;gap:36px}
  .net{max-width:440px;margin:0 auto}
  .who-grid,.reg-grid,.faq-wrap{grid-template-columns:1fr;gap:40px}
  .faq-wrap{gap:28px}
  .nav-links{display:none}
  .nav-cta{margin-left:auto}
}
@media (max-width:560px){
  .wrap{padding:0 20px}
  .logo small{display:none}
  .section{padding:64px 0}
  .learn{grid-template-columns:1fr}
  .net{--ic:42px}
  .node .nm{font-size:12px}
  .node .ss{font-size:10px}
  .core small{font-size:7.5px;letter-spacing:.08em}
  .ctas .btn{flex:1 1 auto}
  .form-panel{padding:24px 20px}
  .avatar{width:76px;height:76px}
  .speaker{padding:24px 22px}
  .cd .v{font-size:22px}
  .foot-in{flex-direction:column;align-items:flex-start;gap:16px}
}