:root{
  --bg:#0a0e13; --bg-soft:#0f151d; --panel:#131a24; --panel-2:#182130;
  --line:#1f2a3a; --txt:#e8edf5; --muted:#94a3b8; --accent:#f5b544; --accent-2:#ffd479;
  --green:#16c784; --radius:16px; --max:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--txt); line-height:1.65;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB",
              "Noto Sans",Roboto,"Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:10px;font-weight:600;font-size:15px;
  border:1px solid transparent;cursor:pointer;transition:.18s ease;white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#100b02;box-shadow:0 6px 22px rgba(245,181,68,.28)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 10px 28px rgba(245,181,68,.38)}
.btn-ghost{border-color:var(--line);color:var(--txt);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,14,19,.82);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.hd{display:flex;align-items:center;gap:26px;height:66px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:19px;letter-spacing:.5px}
.logo i{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#0a0e13;
  font-style:normal;font-weight:800;font-size:16px;
}
.logo b{color:var(--accent)}
nav.main{display:flex;gap:24px;margin-left:auto;font-size:14.5px;color:var(--muted)}
nav.main a:hover{color:var(--accent)}
.hd .btn{padding:9px 18px;font-size:14px}
.lang{display:flex;gap:2px;background:var(--panel);border:1px solid var(--line);border-radius:9px;padding:3px}
.lang a{
  color:var(--muted);font-size:13px;padding:5px 11px;border-radius:6px;
  transition:.15s;text-decoration:none;
}
.lang a:hover{color:var(--txt)}
.lang a.on{background:var(--panel-2);color:var(--accent);font-weight:600}
.burger{display:none;background:none;border:1px solid var(--line);border-radius:8px;color:var(--txt);padding:7px 10px;cursor:pointer}

/* ---------- hero ---------- */
.hero{position:relative;padding:76px 0 46px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(680px 340px at 22% -8%,rgba(245,181,68,.16),transparent 62%),
    radial-gradient(560px 320px at 84% 6%,rgba(22,199,132,.10),transparent 62%);
}
.hero::after{
  content:"";position:absolute;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:56px 56px;
  mask-image:radial-gradient(circle at 50% 0%,#000 0%,transparent 72%);
}
.hero-in{max-width:800px}
.badge{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--accent);
  background:rgba(245,181,68,.08);border:1px solid rgba(245,181,68,.28);
  padding:6px 14px;border-radius:99px;margin-bottom:24px;
}
.badge s{width:6px;height:6px;border-radius:50%;background:var(--green);text-decoration:none;box-shadow:0 0 0 3px rgba(22,199,132,.18)}
h1{font-size:clamp(34px,5.4vw,60px);line-height:1.14;letter-spacing:-1px;font-weight:800}
h1 span{color:var(--accent)}
.hero p.lead{color:var(--muted);font-size:clamp(15px,2vw,18px);margin:22px 0 32px;max-width:640px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.hero-note{font-size:13px;color:var(--muted);margin-top:16px}
.trust{display:flex;flex-wrap:wrap;gap:10px;margin-top:38px}
.trust span{
  font-size:13px;color:var(--muted);border:1px solid var(--line);
  background:rgba(255,255,255,.02);padding:7px 14px;border-radius:8px;
  display:flex;align-items:center;gap:7px;
}
.trust span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--green)}

/* ---------- section base ---------- */
section{padding:74px 0}
.sec-head{max-width:640px;margin-bottom:44px}
.sec-head h2{font-size:clamp(25px,3.4vw,36px);font-weight:750;letter-spacing:-.5px;line-height:1.25}
.sec-head p{color:var(--muted);margin-top:12px;font-size:15.5px}
.kicker{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:2px;text-transform:uppercase;margin-bottom:12px}

/* ---------- features ---------- */
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{
  background:linear-gradient(180deg,var(--panel),var(--bg-soft));
  border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;
  transition:.2s ease;position:relative;overflow:hidden;
}
.card:hover{border-color:rgba(245,181,68,.42);transform:translateY(-3px)}
.card .ic{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:rgba(245,181,68,.10);border:1px solid rgba(245,181,68,.22);color:var(--accent);
}
.card h3{font-size:16.5px;font-weight:700;margin-bottom:8px}
.card p{font-size:14px;color:var(--muted);line-height:1.7}

/* ---------- stats ---------- */
.stats-band{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-soft)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:40px 0;text-align:center}
.stats b{display:block;font-size:clamp(24px,3.2vw,34px);font-weight:800;color:var(--accent);letter-spacing:-.5px}
.stats span{font-size:13.5px;color:var(--muted)}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:s}
.step{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;position:relative;
}
.step::before{
  counter-increment:s;content:"0" counter(s);
  position:absolute;top:16px;right:20px;font-size:44px;font-weight:800;
  color:rgba(245,181,68,.10);letter-spacing:-2px;
}
.step h3{font-size:17px;margin-bottom:9px}
.step p{font-size:14px;color:var(--muted)}

/* ---------- faq ---------- */
.faq{max-width:820px}
details{
  border:1px solid var(--line);border-radius:12px;background:var(--panel);
  margin-bottom:11px;overflow:hidden;transition:.18s;
}
details[open]{border-color:rgba(245,181,68,.35);background:var(--panel-2)}
summary{
  cursor:pointer;padding:17px 22px;font-weight:600;font-size:15.5px;
  list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center;
}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--accent);font-size:20px;font-weight:400;transition:.2s}
details[open] summary::after{transform:rotate(45deg)}
details p{padding:0 22px 19px;color:var(--muted);font-size:14.5px}

/* ---------- contact ---------- */
.contact{
  background:linear-gradient(180deg,var(--panel),var(--bg-soft));
  border:1px solid var(--line);border-radius:22px;padding:46px 34px;text-align:center;
  position:relative;overflow:hidden;
}
.contact::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:radial-gradient(520px 240px at 50% -20%,rgba(245,181,68,.15),transparent 70%);
}
.contact>*{position:relative;z-index:1}
.contact h2{font-size:clamp(23px,3vw,32px);font-weight:750}
.contact p{color:var(--muted);margin:12px 0 30px;font-size:15.5px}
.channels{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.channel{
  display:flex;align-items:center;gap:10px;padding:13px 22px;border-radius:11px;
  background:var(--panel-2);border:1px solid var(--line);font-weight:600;font-size:14.5px;
  transition:.18s;
}
.channel:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.channel svg{width:19px;height:19px;flex:none}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:38px 0 30px;background:var(--bg-soft)}
.f-top{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:center;margin-bottom:24px}
.f-links{display:flex;gap:20px;font-size:13.5px;color:var(--muted)}
.f-links a:hover{color:var(--accent)}
.risk{font-size:12px;color:#6b7a90;line-height:1.75;border-top:1px solid var(--line);padding-top:20px;max-width:960px}
.copy{font-size:12.5px;color:#556274;margin-top:14px}

/* ---------- floating chat + mobile bar ---------- */
.fab{
  position:fixed;right:22px;bottom:24px;z-index:70;
  display:flex;align-items:center;gap:9px;padding:13px 20px;border-radius:99px;
  background:linear-gradient(135deg,var(--green),#0ea86c);color:#04140d;font-weight:700;font-size:14px;
  box-shadow:0 8px 26px rgba(22,199,132,.34);transition:.18s;
}
.fab:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(22,199,132,.45)}
.fab svg{width:18px;height:18px}
.mbar{display:none}

@media (max-width:960px){
  .grid4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr);gap:26px}
  .steps{grid-template-columns:1fr}
}
@media (max-width:760px){
  nav.main,.hd>.btn{display:none}
  .burger{display:block;margin-left:auto}
  .hero{padding:56px 0 50px}
  section{padding:54px 0}
  .grid4{grid-template-columns:1fr}
  .contact{padding:34px 20px}
  .fab{bottom:76px;right:14px;padding:11px 17px;font-size:13px}
  .mbar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:65;gap:10px;padding:10px 14px;
    background:rgba(10,14,19,.94);backdrop-filter:blur(12px);border-top:1px solid var(--line);
  }
  .mbar .btn{flex:1;padding:12px;font-size:14.5px}
  body{padding-bottom:66px}
  .f-top{flex-direction:column;align-items:flex-start}
}

/* ---------- 法律条款页 ---------- */
.legal{padding:56px 0 70px;max-width:760px}
.legal h1{font-size:clamp(26px,3.4vw,36px);font-weight:780;letter-spacing:-.5px}
.legal .updated{color:var(--muted);font-size:13.5px;margin:10px 0 26px}
.legal .intro{color:var(--muted);font-size:14.5px;border-left:2px solid var(--accent);padding-left:16px;margin-bottom:34px}
.legal section{margin-bottom:30px;scroll-margin-top:90px}
.legal h2{font-size:19px;margin-bottom:12px;color:var(--accent)}
.legal p{color:var(--muted);font-size:14.5px;margin-bottom:11px;line-height:1.8}
.legal .back{display:inline-flex;align-items:center;gap:7px;color:var(--muted);font-size:14px;margin-bottom:24px}
.legal .back:hover{color:var(--accent)}

/* ---------- 品牌副标题 ---------- */
.brandsub{font-style:normal;font-size:12.5px;color:var(--muted);padding-left:10px;margin-left:2px;
  border-left:1px solid var(--line);font-weight:500;letter-spacing:0}
@media(max-width:960px){.brandsub{display:none}}

/* ---------- 四步流程 ---------- */
.steps{grid-template-columns:repeat(4,1fr)}
@media (max-width:960px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.steps{grid-template-columns:1fr}}

/* ---------- 承诺带 ---------- */
.trustband{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-soft)}
.trustband .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:34px 22px}
.trustband .item{text-align:center}
.trustband .item b{display:block;font-size:16.5px;color:var(--accent);margin-bottom:4px}
.trustband .item span{font-size:13px;color:var(--muted)}
@media(max-width:760px){.trustband .wrap{grid-template-columns:repeat(2,1fr);gap:24px}}

/* ---------- 团队/创始人 ---------- */
.team{display:grid;grid-template-columns:190px 1fr;gap:34px;align-items:center;
  background:linear-gradient(180deg,var(--panel),var(--bg-soft));border:1px solid var(--line);
  border-radius:22px;padding:34px}
.team .ava{width:190px;height:190px;border-radius:22px;object-fit:cover;border:1px solid var(--line)}
.team h3{font-size:20px;margin-bottom:6px}
.team .role{color:var(--accent);font-size:14px;margin-bottom:14px}
.team p.bio{color:var(--muted);font-size:14.5px;line-height:1.85}
.team ul{list-style:none;display:flex;flex-wrap:wrap;gap:9px;margin-top:16px}
.team ul li{font-size:13px;color:var(--muted);border:1px solid var(--line);padding:6px 12px;border-radius:8px}
@media(max-width:760px){
  .team{grid-template-columns:1fr;text-align:center;padding:26px;gap:22px}
  .team .ava{width:130px;height:130px;margin:0 auto}
  .team ul{justify-content:center}
}

/* ---------- 404 ---------- */
.notfound{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:18px;text-align:center;padding:40px 22px}
.notfound h1{font-size:clamp(60px,12vw,110px);color:var(--accent);letter-spacing:-4px}
.notfound p{color:var(--muted);font-size:15px}
.notfound .nf-links{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:10px}

/* 法律页内的 section 不受全局 section 内边距影响 */
.legal section{padding:0;margin-bottom:30px}
.legal .back{display:inline-block}

/* 六项服务：三列栅格 */
.grid-alt{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:960px){.grid-alt{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.grid-alt{grid-template-columns:1fr}}

/* 人像 logo：圆形 + 金边 */
.logo img.mark{width:32px;height:32px;border-radius:50%;object-fit:cover;
  border:1.5px solid var(--accent);background:var(--panel);flex:none;display:block}
.f-top .logo img.mark{width:28px;height:28px}
@media(max-width:760px){.logo img.mark{width:28px;height:28px}}