:root{
  --bg:#0b0a14; --bg2:#15122b; --ink:#f4f3fb; --muted:#a7a3c4;
  --line:rgba(255,255,255,.08);
  --c1:#ff7a45; --c2:#ff3d77; --c3:#7c5cff;
  --grad:linear-gradient(120deg,#ff7a45,#ff3d77 55%,#7c5cff);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--ink);background:var(--bg);
  background-image:radial-gradient(1100px 600px at 80% -10%,rgba(124,92,255,.18),transparent 60%),
                   radial-gradient(900px 500px at 0% 10%,rgba(255,122,69,.16),transparent 55%);
  line-height:1.6;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}

/* 按钮 */
.btn-primary{display:inline-block;background:var(--grad);color:#fff;font-weight:600;
  padding:10px 18px;border-radius:999px;transition:.2s;box-shadow:0 8px 24px rgba(255,90,110,.28)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06)}
.btn-primary.lg{padding:14px 28px;font-size:16px}
.btn-ghost{border:1px solid var(--line);color:var(--ink);padding:10px 18px;border-radius:999px;transition:.2s}
.btn-ghost:hover{border-color:var(--c2);color:#fff}
.btn-ghost.lg{padding:14px 28px;font-size:16px}

/* 导航 */
.nav{position:sticky;top:0;z-index:20;backdrop-filter:blur(12px);
  background:rgba(11,10,20,.6);border-bottom:1px solid var(--line)}
.nav-inner{max-width:1120px;margin:0 auto;display:flex;align-items:center;gap:24px;padding:14px 22px}
.brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:600}
.brand .logo{font-size:22px}
.brand-name b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;gap:22px;margin-left:auto;font-size:14px;color:var(--muted)}
.nav-links a:hover{color:#fff}
.nav .btn-primary{margin-left:8px}

/* Hero */
.hero{position:relative;overflow:hidden;padding:90px 22px 70px}
.hero-glow{position:absolute;inset:0;background:
  radial-gradient(600px 300px at 50% 0%,rgba(255,61,119,.20),transparent 70%);
  pointer-events:none}
.hero-inner{max-width:880px;margin:0 auto;text-align:center;position:relative}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:1px;color:var(--c1);
  border:1px solid rgba(255,122,69,.35);padding:5px 14px;border-radius:999px;margin-bottom:20px}
.hero h1{font-size:clamp(34px,6vw,60px);line-height:1.1;font-weight:800;letter-spacing:-1px}
.lead{color:var(--muted);font-size:18px;max-width:640px;margin:20px auto 30px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-stats{display:flex;gap:34px;justify-content:center;margin-top:48px;flex-wrap:wrap}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats b{font-size:26px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats span{font-size:13px;color:var(--muted)}

/* 区块 */
.section{max-width:1120px;margin:0 auto;padding:72px 22px}
.section-head{text-align:center;margin-bottom:42px}
.kicker{font-size:13px;letter-spacing:2px;color:var(--c2);text-transform:uppercase}
.section-head h2{font-size:clamp(26px,4vw,38px);margin:10px 0 8px;font-weight:800}
.section-head p{color:var(--muted)}

/* 能力卡片 */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.01));
  border:1px solid var(--line);border-radius:20px;padding:28px 24px;transition:.25s}
.card:hover{transform:translateY(-4px);border-color:rgba(255,61,119,.45)}
.card .ic{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-size:26px;background:rgba(255,122,69,.14);margin-bottom:16px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--muted);font-size:14.5px}

/* 流程 */
.flow{background:rgba(255,255,255,.02);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.steps{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap}
.step{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:18px;
  padding:26px 26px;width:260px;text-align:center}
.step .num{width:38px;height:38px;border-radius:50%;background:var(--grad);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-weight:700;margin-bottom:12px}
.step h3{font-size:18px;margin-bottom:6px}
.step p{color:var(--muted);font-size:14px}
.arrow{font-size:26px;color:var(--c2)}

/* 为什么 */
.why-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.why{display:flex;gap:14px;background:rgba(255,255,255,.03);border:1px solid var(--line);
  border-radius:16px;padding:20px 22px}
.why b{color:var(--c1);font-size:15px;min-width:88px}
.why span{color:var(--muted);font-size:14.5px}

/* CTA */
.cta{max-width:1120px;margin:0 auto;padding:30px 22px 80px}
.cta-box{text-align:center;padding:56px 24px;border-radius:26px;
  background:linear-gradient(120deg,rgba(255,122,69,.16),rgba(124,92,255,.16));
  border:1px solid rgba(255,61,119,.3)}
.cta-box h2{font-size:clamp(24px,4vw,34px);margin-bottom:10px}
.cta-box p{color:var(--muted);margin-bottom:24px}

/* 页脚 */
.footer{border-top:1px solid var(--line);padding:26px 22px}
.footer-inner{max-width:1120px;margin:0 auto;display:flex;justify-content:space-between;
  align-items:center;flex-wrap:wrap;gap:10px;font-size:14px}
.footer .brand{font-size:16px}
.muted{color:var(--muted)}

/* 公告 + 导航登录 */
.announce{background:linear-gradient(90deg,#ff7a45,#7c5cff);color:#fff;text-align:center;
  font-size:13px;padding:8px 14px}
.nav-login{color:#ff4d6d;font-weight:600;font-size:14px;text-decoration:none;margin-right:8px}
.nav-login:hover{opacity:.8}

@media(max-width:860px){
  .cards{grid-template-columns:1fr}
  .why-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .step{width:100%}
  .arrow{display:none}
}