:root{
  --brand:#6c5ce7;
  --brand-2:#8f7bff;
  --ink:#12161f;
  --ink-2:#4b5563;
  --ink-3:#8a93a3;
  --line:#e9ecf3;
  --bg:#ffffff;
  --bg-2:#f7f8fc;
  --radius:16px;
  --shadow:0 10px 30px rgba(24,28,45,.08);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.wrap{width:min(1180px,92vw);margin:0 auto}
.wrap.narrow{width:min(820px,92vw)}

/* ---------- 导航 ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:.2s}
.nav.scrolled{border-bottom-color:var(--line);box-shadow:0 6px 18px rgba(24,28,45,.05)}
.nav-inner{display:flex;align-items:center;gap:26px;height:70px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand-name{font-size:20px;letter-spacing:.5px}
.brand-sub{font-size:12px;color:var(--ink-3);border-left:1px solid var(--line);padding-left:10px}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:14px;color:var(--ink-2)}
.nav-links a:hover{color:var(--brand)}
.nav-btn{margin-left:6px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;padding:10px 18px;font-size:14px;font-weight:600;border:1px solid transparent;transition:.18s;cursor:pointer}
.btn-lg{padding:14px 24px;font-size:15px;border-radius:14px}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 10px 22px rgba(108,92,231,.28)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 14px 28px rgba(108,92,231,.34)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-2)}
.btn-ghost:hover{border-color:#d7dbe8;color:var(--ink)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:64px 0 40px}
.hero::before{content:"";position:absolute;inset:-30% -10% auto -10%;height:560px;background:
  radial-gradient(600px 300px at 20% 20%,rgba(108,92,231,.12),transparent 60%),
  radial-gradient(520px 280px at 80% 0%,rgba(0,196,180,.10),transparent 60%);}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.pill{display:inline-block;font-size:12px;color:var(--brand);background:rgba(108,92,231,.08);border:1px solid rgba(108,92,231,.18);padding:5px 12px;border-radius:999px;font-weight:600}
.hero h1{font-size:52px;line-height:1.18;margin:18px 0 14px;letter-spacing:-.5px}
.lead{font-size:16px;color:var(--ink-2);max-width:540px;margin:0 0 26px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:18px;font-size:13px;color:var(--ink-3)}
.dot{width:4px;height:4px;border-radius:50%;background:#cfd5e3;display:inline-block}

/* ---------- 模拟窗口 ---------- */
.hero-art{position:relative}
.mock{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden;transform:rotate(-1deg)}
.mock-bar{display:flex;align-items:center;gap:6px;padding:12px 14px;border-bottom:1px solid var(--line);background:var(--bg-2)}
.mock-bar i{width:9px;height:9px;border-radius:50%;background:#e3e6ef;display:block}
.mock-bar span{margin-left:10px;font-size:12px;color:var(--ink-3)}
.mock-body{display:flex;min-height:300px}
.mock-side{width:92px;border-right:1px solid var(--line);padding:14px 10px;display:flex;flex-direction:column;gap:10px;background:#fbfcff}
.mi{height:10px;border-radius:6px;background:#eef0f7}
.mi.active{background:linear-gradient(90deg,var(--brand),var(--brand-2));opacity:.85}
.mock-main{flex:1;padding:16px;display:flex;flex-direction:column;gap:14px}
.mock-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.mock-card{border:1px solid var(--line);border-radius:12px;padding:12px}
.mock-card b{display:block;font-size:20px}
.mock-card span{font-size:11px;color:var(--ink-3)}
.mock-panel{border:1px solid var(--line);border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:9px}
.mock-panel.short{opacity:.75}
.mock-line{height:9px;border-radius:6px;background:#eef0f7}
.w40{width:40%}.w50{width:50%}.w60{width:60%}.w70{width:70%}.w80{width:80%}.w90{width:90%}

/* ---------- 数据条 ---------- */
.stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-2)}
.stats-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding:26px 0;text-align:center}
.stats b{display:block;font-size:22px;letter-spacing:-.3px}
.stats span{font-size:12px;color:var(--ink-3)}

/* ---------- 通用区块 ---------- */
.section{padding:84px 0}
.section.alt{background:var(--bg-2)}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head h2{font-size:36px;letter-spacing:-.5px;margin:0 0 10px}
.sec-head p{color:var(--ink-2);margin:0}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{border:1px solid var(--line);border-radius:var(--radius);padding:26px;background:#fff;transition:.2s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#e2e6f2}
.card .ic{font-size:24px;width:46px;height:46px;display:flex;align-items:center;justify-content:center;border-radius:12px;background:rgba(108,92,231,.08);margin-bottom:14px}
.card h3{font-size:18px;margin:0 0 8px}
.card p{margin:0;font-size:14px;color:var(--ink-2)}

/* ---------- 三步 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.step{border:1px solid var(--line);border-radius:var(--radius);padding:26px;background:#fff}
.step .num{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;margin-bottom:14px}
.step h3{font-size:17px;margin:0 0 8px}
.step p{margin:0;font-size:14px;color:var(--ink-2)}

/* ---------- FAQ ---------- */
.qa{border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin-bottom:12px;background:#fff}
.qa summary{cursor:pointer;font-weight:600;font-size:15px;list-style:none}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";float:right;color:var(--ink-3);font-weight:400}
.qa[open] summary::after{content:"–"}
.qa p{margin:10px 0 0;color:var(--ink-2);font-size:14px}

/* ---------- CTA ---------- */
.cta{padding:64px 0;background:linear-gradient(135deg,#f4f1ff,#eefbf8)}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.cta h2{font-size:30px;margin:0 0 6px;letter-spacing:-.3px}
.cta p{margin:0;color:var(--ink-2)}

/* ---------- 页脚 ---------- */
.foot{border-top:1px solid var(--line);padding:34px 0;background:#fff}
.foot-inner{display:flex;align-items:center;gap:22px;flex-wrap:wrap;justify-content:space-between}
.foot-brand{display:flex;align-items:center;gap:10px;font-weight:600}
.foot-links{display:flex;gap:20px;font-size:14px;color:var(--ink-2)}
.foot-links a:hover{color:var(--brand)}
.foot-copy{font-size:12px;color:var(--ink-3);width:100%}
.muted{opacity:.7}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .hero-inner{grid-template-columns:1fr}
  .hero h1{font-size:40px}
  .grid-3,.steps{grid-template-columns:1fr 1fr}
  .stats-inner{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
}
@media (max-width:620px){
  .grid-3,.steps{grid-template-columns:1fr}
  .hero{padding-top:40px}
  .hero h1{font-size:32px}
  .sec-head h2{font-size:26px}
}