:root{
  --navy:#0B1F3A; --navy2:#102a4c; --orange:#D9622A; --green:#7BC98F;
  --ink:#14202e; --muted:#5b6b7d; --paper:#f4f1ea; --line:#d9d4c8;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--navy);line-height:1.55;-webkit-font-smoothing:antialiased}
.wrap{max-width:1040px;width:100%;margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.15;margin:0}
h2{font-size:clamp(24px,3.6vw,36px);margin-bottom:18px}
.lead{font-size:18px;max-width:720px;margin:0 0 32px;opacity:.9}

/* hero: put a photo at assets/hero.jpg to use it; gradient otherwise */
.hero{min-height:min(86vh,680px);color:#fff;display:flex;flex-direction:column;
  background:linear-gradient(90deg,rgba(11,31,58,.92) 0%,rgba(11,31,58,.55) 60%,rgba(11,31,58,.25) 100%),url("assets/hero.jpg") center/cover no-repeat,linear-gradient(135deg,#0B1F3A,#17407a)}
.nav{display:flex;justify-content:space-between;align-items:center;padding-top:22px;padding-bottom:22px}
.brand{font-weight:800;letter-spacing:.02em}
.nav-links{display:flex;gap:28px}
.nav-link{color:#fff;text-decoration:none;opacity:.85}
.hero-body{margin-block:auto;padding-top:40px;padding-bottom:90px}
.hero h1{font-size:clamp(40px,8vw,84px);font-weight:800;letter-spacing:-.02em}
.hero .sub{font-size:clamp(18px,2.4vw,24px);margin:22px 0 34px;max-width:620px;opacity:.92}
.btn{display:inline-block;background:var(--orange);color:#fff;text-decoration:none;font-weight:700;padding:14px 28px;border-radius:6px}
.btn:hover{filter:brightness(1.08)}

section{padding:72px 0}
.light{background:var(--paper)}
.dark{color:#fff;background:var(--navy)}
.dark.alt{background:var(--navy2)}

/* recognition + team */
.awards{list-style:none;padding:0;margin:28px 0 40px;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.awards li{background:#fff;border:1px solid var(--line);border-radius:8px;padding:16px;display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.awards img{height:44px;width:auto;max-width:100%;object-fit:contain}
.awards span{font-weight:600;font-size:15px}
.team{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.person{display:flex;flex-direction:column;gap:2px;border-left:3px solid var(--orange);padding:4px 0 4px 14px}
.person strong{font-size:18px}
.schools{display:flex;gap:10px;margin:8px 0 2px}
.schools img{width:40px;height:40px;border-radius:50%;background:#fff;border:1px solid var(--line)}
.person a{color:var(--orange);font-weight:600;font-size:15px;margin-top:4px;width:max-content}
.advisor{color:var(--muted);margin:22px 0 0;max-width:640px}

/* problem */
.plan{margin:0 0 36px}
.plan img{width:100%;height:auto;display:block}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
.card{display:flex;gap:16px;align-items:center;padding:18px;border:2px solid;border-radius:10px;background:rgba(255,255,255,.04)}
.card.g{border-color:var(--green)} .card.o{border-color:var(--orange)}
.card img{width:44px;height:44px;flex:none}
.card h3{font-size:18px;margin-bottom:4px}
.card p{margin:0;font-size:15px;opacity:.85}

/* solution flow */
.flow{display:flex;gap:18px;align-items:center}
.before{flex:0 0 230px;border:2px solid #3b4d66;border-radius:12px;padding:18px;display:flex;flex-direction:column;gap:6px;background:rgba(255,255,255,.03)}
.tag{display:inline-block;align-self:flex-start;font-size:12px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;border:2px solid #9AA5A5;color:#c3cbcb;border-radius:6px;padding:3px 10px;margin-bottom:8px}
.tag.o{border-color:var(--orange);color:var(--orange)}
.step{display:flex;gap:10px;align-items:center}
.step img{width:30px;height:30px}
.down{color:#9AA5A5;text-align:center;line-height:1}
.arrow{color:var(--orange);font-size:30px;font-weight:700;flex:none}
.after{flex:1;border:2px solid var(--orange);border-radius:12px;padding:18px;background:rgba(255,255,255,.03)}
.after-grid{display:grid;grid-template-columns:1fr auto 1.2fr auto 1fr;gap:10px;align-items:center}
.chips{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.chips li{border:2px solid var(--green);border-radius:8px;text-align:center;font-weight:700;font-size:14px;padding:7px 8px}
.arrow.s{font-size:22px}
.core{background:var(--orange);border-radius:10px;padding:22px 12px;text-align:center;display:flex;flex-direction:column;gap:6px;align-items:center}
.core img{width:36px;height:36px}
.core b{font-size:18px}
.core span{font-size:13px;font-weight:600;opacity:.95}
.out{border:2px solid var(--green);border-radius:10px;padding:18px 12px;text-align:center;display:flex;flex-direction:column;gap:8px}
.out b{font-size:16px}
.out span{color:var(--green);font-size:13px;font-weight:700}

/* contact */
.contact{padding-bottom:84px}
.form{display:grid;gap:16px;max-width:560px}
.form label{display:grid;gap:6px;font-weight:600;font-size:15px}
.form input,.form textarea{font:inherit;color:var(--ink);background:#fff;border:2px solid transparent;border-radius:6px;padding:10px 12px}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--orange)}
.form .hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.form .btn{border:0;font:inherit;font-weight:700;cursor:pointer;justify-self:start}
.form .btn:disabled{opacity:.6;cursor:default}
.status{margin:0;min-height:1.5em}
.status.bad{color:#ffb4a0;font-weight:600}
.note{margin:18px 0 0;opacity:.7;font-size:15px}
.foot{padding:22px 0;font-size:14px;opacity:.7;border-top:1px solid rgba(255,255,255,.15)}

@media (max-width:640px){
  .plan{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .plan img{min-width:680px}
}
@media (max-width:820px){
  section{padding:52px 0}
  .flow{flex-direction:column;align-items:stretch}
  .before{flex:none}
  .arrow{align-self:center;transform:rotate(90deg)}
  .after-grid{grid-template-columns:1fr}
  .arrow.s{align-self:center;justify-self:center;transform:rotate(90deg)}
}