:root{
  --bg:#070b16;
  --bg2:#0c1222;
  --panel:rgba(18,26,48,.55);
  --cyan:#21e6ff;
  --magenta:#ff2e97;
  --purple:#8b5cff;
  --text:#e7ecf5;
  --muted:#94a3c4;
  --line:rgba(120,150,255,.16);
  --glow:0 0 24px rgba(33,230,255,.35);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.65;
  overflow-x:hidden;-webkit-font-smoothing:antialiased;
}
body::before{content:"";position:fixed;inset:0;z-index:-2;background:
  radial-gradient(900px 600px at 12% -5%,rgba(33,230,255,.12),transparent 60%),
  radial-gradient(800px 600px at 95% 8%,rgba(255,46,151,.10),transparent 60%),
  radial-gradient(1000px 700px at 50% 110%,rgba(139,92,255,.10),transparent 60%),
  var(--bg);}
body::after{content:"";position:fixed;inset:0;z-index:-1;opacity:.35;background-image:
  linear-gradient(var(--line) 1px,transparent 1px),
  linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(circle at 50% 30%,#000,transparent 80%);}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}

/* NAV */
nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(12px);background:rgba(7,11,22,.7);border-bottom:1px solid var(--line);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:1px}
.brand .dot{width:10px;height:10px;border-radius:50%;background:var(--cyan);box-shadow:var(--glow);animation:pulse 2.2s infinite}
.brand b{background:linear-gradient(90deg,var(--cyan),var(--purple),var(--magenta));-webkit-background-clip:text;background-clip:text;color:transparent;font-size:18px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{color:var(--muted);font-size:14px;transition:.2s}
.nav-links a:hover{color:var(--text)}
.lang-btn{border:1px solid var(--line);background:transparent;color:var(--text);padding:6px 12px;border-radius:999px;font-size:13px;cursor:pointer;transition:.2s;}
select.lang-btn{background:var(--bg2);-webkit-appearance:none;appearance:none;padding-right:14px}
.lang-btn:hover{border-color:var(--cyan);box-shadow:var(--glow)}
.badge{font-size:12px;padding:4px 10px;border-radius:999px;border:1px solid var(--magenta);color:var(--magenta);box-shadow:0 0 12px rgba(255,46,151,.3);animation:pulse 2.6s infinite;}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.55}}

/* HERO */
header.hero{position:relative;padding:104px 0 86px;text-align:center}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:3px;color:var(--cyan);margin-bottom:18px;text-transform:uppercase}
.hero h1{font-size:clamp(42px,8vw,92px);font-weight:900;letter-spacing:2px;line-height:1.05;background:linear-gradient(90deg,#fff,var(--cyan) 40%,var(--purple) 70%,var(--magenta));-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 30px rgba(33,230,255,.25));}
.brand-cn{font-size:clamp(24px,4.5vw,48px);font-weight:700;color:var(--cyan);margin-top:10px;letter-spacing:6px;text-shadow:0 0 24px rgba(33,230,255,.45);}
.hero .sub{margin:22px auto 0;max-width:680px;color:var(--muted);font-size:clamp(15px,2.4vw,19px)}
.hero .cta{margin-top:38px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{padding:13px 26px;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;transition:.2s;border:1px solid transparent;}
.btn-primary{background:linear-gradient(90deg,var(--cyan),var(--purple));color:#04070f;box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--cyan)}

/* progress strip */
.strip{margin:54px auto 0;max-width:820px}
.strip .meta{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-bottom:10px}
.bar{height:8px;border-radius:999px;background:rgba(255,255,255,.07);overflow:hidden;position:relative}
.bar > i{position:absolute;left:0;top:0;bottom:0;width:100%;background:linear-gradient(90deg,var(--cyan),var(--purple),var(--magenta));box-shadow:var(--glow);border-radius:999px}
.coming{margin-top:18px;font-size:15px;color:var(--magenta);font-weight:700;letter-spacing:1px}
.coming span{display:inline-block;animation:pulse 2s infinite}

/* SECTION */
section{padding:78px 0}
section.page{padding-top:120px}
.sec-head{text-align:center;margin-bottom:48px}
.sec-head .kicker{color:var(--cyan);font-size:13px;letter-spacing:3px;text-transform:uppercase}
.sec-head h2{font-size:clamp(28px,4.5vw,42px);margin-top:10px;font-weight:800}
.sec-head p{color:var(--muted);max-width:640px;margin:14px auto 0}

/* TIMELINE */
.timeline{position:relative;max-width:860px;margin:0 auto;padding-left:8px}
.timeline::before{content:"";position:absolute;left:18px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--cyan),var(--purple),var(--magenta));opacity:.5}
.tl-item{position:relative;padding:0 0 34px 56px}
.tl-item:last-child{padding-bottom:0}
.tl-node{position:absolute;left:9px;top:4px;width:20px;height:20px;border-radius:50%;background:var(--bg2);border:2px solid var(--cyan);box-shadow:var(--glow)}
.tl-year{font-size:13px;color:var(--cyan);font-weight:700;letter-spacing:1px}
.tl-card{margin-top:8px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 20px;backdrop-filter:blur(6px)}
.tl-card h3{font-size:18px;margin-bottom:6px}
.tl-card p{color:var(--muted);font-size:14.5px}
.tag{display:inline-block;margin-top:10px;font-size:11px;color:var(--muted);border:1px dashed var(--line);padding:2px 9px;border-radius:6px}
.tl-points,.tech-points{margin:10px 0 0;padding-left:18px;color:var(--muted);font-size:13.5px}
.tl-points li,.tech-points li{margin:4px 0}
.empty{text-align:center;color:var(--muted);padding:48px 0;font-size:15px;letter-spacing:2px}

/* TECH GRID */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:26px;transition:.25s;backdrop-filter:blur(6px)}
.card:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:var(--glow)}
.card .ico{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:16px;background:linear-gradient(135deg,rgba(33,230,255,.18),rgba(139,92,255,.18));border:1px solid var(--line)}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14px}

/* FOOTER */
footer{border-top:1px solid var(--line);padding:40px 0;margin-top:30px;background:rgba(7,11,22,.6)}
.foot-grid{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:flex-start}
.disclaimer{max-width:680px;color:var(--muted);font-size:13px}
.disclaimer b{color:var(--text)}
.foot-brand{font-weight:800;background:linear-gradient(90deg,var(--cyan),var(--magenta));-webkit-background-clip:text;background-clip:text;color:transparent}
.copyright{margin-top:22px;color:var(--muted);font-size:12px;text-align:center}

@media(max-width:640px){
  .nav-inner{height:auto;padding:10px 0;flex-wrap:wrap;gap:10px}
  .nav-links{gap:14px;flex-wrap:wrap}
  .nav-links a{font-size:13px}
}