/* 09 launch — 暗场 / 冰蓝 / 倒计时 / 单屏分镜 */
:root{
  --bg:#08090c; --bg2:#0d0f14; --panel:#11141a;
  --ink:#eef1f5; --ink2:#9ba4b2; --ink3:#5f6875;
  --line:rgba(238,241,245,.10); --line2:rgba(238,241,245,.055);
  --accent:oklch(.80 .12 212); --accent2:oklch(.86 .09 195);
  --ease:cubic-bezier(.22,.61,.36,1);
  --max:1120px;
}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font:400 clamp(15px,1.05vw,16.5px)/1.65 ui-sans-serif,"PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
h1,h2,h3,p,ul,form{margin:0}
ul{padding:0;list-style:none}
.wrap{max-width:var(--max);margin:0 auto;padding-inline:clamp(18px,4.5vw,44px)}
.mono{font-family:ui-monospace,"SF Mono",Consolas,monospace;font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--ink3)}
.grain{position:fixed;inset:0;z-index:90;pointer-events:none;opacity:.05;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.75' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

/* 头 */
header{position:fixed;top:0;left:0;right:0;z-index:70;backdrop-filter:blur(14px);
  background:linear-gradient(180deg,rgba(8,9,12,.9),rgba(8,9,12,.4));border-bottom:1px solid var(--line2)}
.hd{display:flex;align-items:center;justify-content:space-between;gap:20px;height:58px}
.brand{font-size:13px;font-weight:600;letter-spacing:.02em;display:flex;align-items:center;gap:9px}
.brand i{width:7px;height:7px;background:var(--accent);border-radius:1px;display:block;transform:rotate(45deg)}
.hd nav{display:flex;gap:22px}
.hd nav a{font-size:12.5px;color:var(--ink2);transition:color .18s}
.hd nav a:hover,.hd nav a[aria-current]{color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 18px;border-radius:2px;
  font-size:13px;font-weight:550;border:1px solid transparent;cursor:pointer;transition:.18s;white-space:nowrap}
.btn-a{background:var(--accent);color:#06131a}
.btn-a:hover{background:var(--accent2)}
.btn-g{border-color:var(--line);color:var(--ink);background:transparent}
.btn-g:hover{border-color:rgba(238,241,245,.32)}
@media(max-width:780px){.hd nav{display:none}}

/* 首屏 */
.hero{position:relative;min-height:100svh;display:grid;align-content:center;padding-block:120px 64px;overflow:hidden}
.glow{position:absolute;border-radius:50%;filter:blur(70px);pointer-events:none;z-index:0}
.glow.a{width:min(680px,86vw);aspect-ratio:1;right:-14%;top:-8%;
  background:radial-gradient(circle,oklch(.80 .12 212/.26),transparent 66%)}
.glow.b{width:min(520px,70vw);aspect-ratio:1;left:-16%;bottom:-18%;
  background:radial-gradient(circle,oklch(.86 .09 195/.14),transparent 68%)}
.hero>*{position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;gap:9px;border:1px solid var(--line);border-radius:999px;
  padding:6px 13px;font-size:11.5px;color:var(--ink2);background:rgba(255,255,255,.02)}
.eyebrow b{color:var(--accent);font-weight:600}
h1{font-size:clamp(2.6rem,7.8vw,6.4rem);line-height:.94;letter-spacing:-.042em;font-weight:600;margin-top:26px}
h1 em{font-style:normal;color:var(--accent);display:inline-block}
h1 .thin{font-weight:300;color:var(--ink2)}
.hero p.sub{margin-top:24px;max-width:46ch;color:var(--ink2);font-size:clamp(14.5px,1.3vw,17px);line-height:1.72}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}

/* 倒计时 */
.count{display:flex;gap:clamp(10px,2.4vw,26px);margin-top:clamp(36px,5vw,56px);
  padding-top:22px;border-top:1px solid var(--line)}
.cd{display:grid;gap:6px}
.cd b{font-family:ui-monospace,"SF Mono",Consolas,monospace;font-size:clamp(1.6rem,4.2vw,2.9rem);
  font-weight:400;letter-spacing:-.03em;font-variant-numeric:tabular-nums;line-height:1;
  background:linear-gradient(180deg,var(--ink),oklch(.72 .02 220));-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent}
.cd span{font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink3)}
.count .when{margin-left:auto;text-align:right;font-size:12px;color:var(--ink3);line-height:1.6;align-self:end}
@media(max-width:640px){.count .when{margin-left:0;text-align:left;width:100%}}

/* 分区 */
section.block{padding-block:clamp(56px,8vw,112px);position:relative}
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,5vw,64px);align-items:center}
@media(max-width:880px){.split{grid-template-columns:1fr}}
h2{font-size:clamp(1.6rem,3.6vw,2.9rem);line-height:1.1;letter-spacing:-.03em;font-weight:560}
.lede{color:var(--ink2);font-size:clamp(14.5px,1.2vw,16.5px);line-height:1.75;max-width:50ch;margin-top:18px}
.big-num{font-family:ui-monospace,monospace;font-size:clamp(4rem,14vw,11rem);line-height:.8;letter-spacing:-.06em;
  color:transparent;-webkit-text-stroke:1px oklch(.80 .12 212/.34);font-weight:300}

/* 三件事 */
.three{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);margin-top:clamp(32px,4.6vw,56px);
  border:1px solid var(--line)}
.three div{background:var(--bg);padding:clamp(20px,2.8vw,32px)}
.three b{display:block;font-family:ui-monospace,monospace;font-size:11px;letter-spacing:.14em;color:var(--accent);
  margin-bottom:12px;font-weight:400}
.three h3{font-size:15px;font-weight:560;margin-bottom:8px}
.three p{font-size:13px;color:var(--ink3);line-height:1.65}
@media(max-width:760px){.three{grid-template-columns:1fr}}

/* 议程页 */
.page-h{padding-block:clamp(88px,12vh,140px) clamp(28px,4vw,44px)}
.page-h h1{font-size:clamp(2rem,5.4vw,3.6rem);margin-top:18px}
.tl{border-top:1px solid var(--line)}
.tlr{display:grid;grid-template-columns:110px 1fr 140px;gap:clamp(14px,3vw,32px);
  padding-block:clamp(18px,2.4vw,28px);border-bottom:1px solid var(--line);align-items:start;
  transition:background .2s}
.tlr:hover{background:var(--bg2)}
.tlr time{font-family:ui-monospace,monospace;font-size:12.5px;color:var(--accent);letter-spacing:.04em}
.tlr h3{font-size:clamp(15px,1.8vw,19px);font-weight:500;letter-spacing:-.01em}
.tlr p{font-size:13px;color:var(--ink3);margin-top:6px;line-height:1.6}
.tlr .who{font-size:12px;color:var(--ink3);text-align:right}
@media(max-width:700px){.tlr{grid-template-columns:1fr;gap:8px}.tlr .who{text-align:left}}
.tlr .tagline{display:inline-block;font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;
  border:1px solid var(--line);padding:2px 6px;color:var(--ink3);margin-top:8px}

/* 报名 */
.reg{display:grid;grid-template-columns:1fr 420px;gap:clamp(24px,4.6vw,64px);
  padding-block:clamp(24px,4vw,48px) clamp(56px,8vw,96px);align-items:start}
@media(max-width:900px){.reg{grid-template-columns:1fr}}
.form{border:1px solid var(--line);background:var(--bg2);padding:clamp(20px,3vw,32px);display:grid;gap:16px}
.field{display:grid;gap:7px}
.field label{font-size:12px;color:var(--ink2)}
.field label i{color:var(--accent);font-style:normal}
.field input,.field select{background:var(--panel);border:1px solid var(--line);border-radius:2px;color:var(--ink);
  font:inherit;font-size:14px;padding:11px 12px;min-height:44px;transition:border-color .16s,box-shadow .16s}
.field input:focus,.field select:focus{outline:none;border-color:var(--accent);
  box-shadow:0 0 0 3px oklch(.80 .12 212/.14)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:520px){.row2{grid-template-columns:1fr}}
.check{display:flex;gap:9px;align-items:flex-start;font-size:12.5px;color:var(--ink2);line-height:1.6}
.check input{margin-top:3px;accent-color:var(--accent)}
.seat{border:1px solid var(--line);padding:18px;display:grid;gap:10px;margin-bottom:14px;background:var(--bg2)}
.seat .r{display:flex;justify-content:space-between;font-size:12.5px;color:var(--ink3)}
.seat .r b{color:var(--ink);font-weight:500;font-variant-numeric:tabular-nums}
.bar{height:4px;background:rgba(255,255,255,.07);border-radius:20px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--accent)}

footer{border-top:1px solid var(--line);padding-block:36px 28px}
.foot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--ink3)}

:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
@media(prefers-reduced-motion:reduce){*{transition-duration:.01ms!important;animation-duration:.01ms!important}}