/* 下载页专属样式 */
.download-hero{
  position:relative;padding:160px 0 60px;text-align:center;overflow:hidden;
  background:
    radial-gradient(900px 460px at 30% 0%,rgba(99,102,241,0.24),transparent 60%),
    radial-gradient(720px 400px at 92% 80%,rgba(52,211,153,0.18),transparent 70%),
    radial-gradient(560px 360px at 50% 50%,rgba(236,72,153,0.10),transparent 80%),
    linear-gradient(180deg,#0b0e14 0%,#0e131c 100%);
}
.download-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,0.025) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 30%,transparent 75%);
}
.download-hero .container{position:relative;z-index:2}
.download-hero h1{
  font-size:clamp(36px,5.5vw,58px);font-weight:800;color:#fff;
  line-height:1.15;letter-spacing:-1px;margin-bottom:18px;
}
.download-hero h1 .grad{
  background:linear-gradient(120deg,#34d399 0%,#06b6d4 35%,#6366f1 70%,#a78bfa 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.download-hero .lead{font-size:17px;color:var(--text-secondary);max-width:620px;margin:0 auto 24px}
.download-hero .badges{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:8px}
.badge-pill{
  display:inline-flex;align-items:center;gap:6px;padding:6px 14px;
  border-radius:100px;background:var(--bg-card-hover);border:1px solid var(--border-hover);
  font-size:13px;color:var(--text-secondary);
}
.badge-pill svg{width:14px;height:14px;color:var(--brand-1)}

/* 下载卡片 */
.download-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:60px;
}
.download-card{
  background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.01));
  border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:32px 24px;text-align:center;position:relative;overflow:hidden;
  transition:all .35s ease;
}
.download-card::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 50% 0%,rgba(74,158,255,.12),transparent 60%);
  opacity:0;transition:opacity .35s;
}
.download-card:hover{
  border-color:var(--border-hover);transform:translateY(-6px);box-shadow:var(--shadow);
}
.download-card:hover::before{opacity:1}
.download-icon{
  width:72px;height:72px;margin:0 auto 18px;border-radius:18px;
  background:linear-gradient(135deg,rgba(74,158,255,.2),rgba(26,109,212,.08));
  border:1px solid var(--border-hover);
  display:grid;place-items:center;color:var(--brand-1);
  box-shadow:0 8px 24px rgba(74,158,255,.15);
}
.download-icon svg{width:38px;height:38px}
.download-card .platform{font-size:20px;font-weight:700;color:#fff;margin-bottom:4px}
.download-card .version{font-size:12px;color:var(--text-tertiary);margin-bottom:18px;font-family:"SF Mono","Menlo",monospace}
.download-card .meta{display:flex;justify-content:center;gap:14px;font-size:12px;color:var(--text-tertiary);margin-bottom:22px}
.download-card .meta span{display:inline-flex;align-items:center;gap:4px}
.download-card .btn{width:100%;justify-content:center;padding:12px 20px;font-size:14px}

/* 系统要求 */
.requirement{background:linear-gradient(180deg,var(--bg-primary) 0%,var(--bg-secondary) 100%)}
.req-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.req-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:32px;transition:all .3s;
}
.req-card:hover{border-color:var(--border-hover);box-shadow:var(--shadow)}
.req-head{display:flex;align-items:center;gap:14px;margin-bottom:20px;padding-bottom:18px;border-bottom:1px solid var(--border)}
.req-head .ico{
  width:48px;height:48px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(74,158,255,.18),rgba(26,109,212,.08));
  border:1px solid var(--border-hover);color:var(--brand-1);
}
.req-head .ico svg{width:24px;height:24px}
.req-head h3{font-size:18px;font-weight:600;color:#fff}
.req-list{display:flex;flex-direction:column;gap:12px}
.req-list li{display:flex;justify-content:space-between;gap:14px;font-size:14px}
.req-list .key{color:var(--text-tertiary)}
.req-list .val{color:var(--text-secondary);font-weight:500;text-align:right}

/* 安装步骤 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative}
.step-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:36px 28px;position:relative;transition:all .35s;
}
.step-card:hover{border-color:var(--border-hover);transform:translateY(-4px);box-shadow:var(--shadow)}
.step-num{
  width:56px;height:56px;border-radius:50%;
  background:var(--gradient);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:22px;margin-bottom:20px;
  box-shadow:0 8px 20px rgba(74,158,255,.35);
}
.step-card h3{font-size:19px;font-weight:600;color:#fff;margin-bottom:10px}
.step-card p{color:var(--text-tertiary);font-size:14.5px;line-height:1.7}

/* 小型 FAQ */
.mini-faq{
  max-width:780px;margin:60px auto 0;background:var(--bg-card);
  border:1px solid var(--border);border-radius:var(--radius-lg);padding:30px 32px;
}
.mini-faq h3{font-size:18px;font-weight:600;color:#fff;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.mini-faq h3 svg{width:22px;height:22px;color:var(--brand-1)}
.mini-faq ul{display:flex;flex-direction:column;gap:10px}
.mini-faq li{display:flex;gap:10px;font-size:14px;color:var(--text-secondary);align-items:flex-start}
.mini-faq li svg{width:16px;height:16px;color:var(--brand-1);flex:none;margin-top:4px}

/* 5 步安装 - 时间线样式 */
.install-steps{
  list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:14px;
}
.install-steps .step-card{
  display:grid;grid-template-columns:90px 1fr;gap:24px;align-items:start;
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:24px 28px;transition:all .3s;
}
.install-steps .step-card:hover{border-color:var(--border-hover);box-shadow:var(--shadow);transform:translateY(-2px)}
.install-steps .step-num{
  font-size:34px;font-weight:800;line-height:1;
  background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent;
  font-family:'JetBrains Mono',ui-monospace,monospace;
}
.install-steps .step-card h3{font-size:18px;color:#fff;font-weight:600;margin-bottom:8px}
.install-steps .step-card p{font-size:14.5px;color:var(--text-tertiary);line-height:1.75}

.download-meta{text-align:center;font-size:12.5px;color:var(--text-tertiary);margin-top:24px}
.download-meta code{
  background:rgba(74,158,255,.08);padding:2px 8px;border-radius:6px;
  font-size:11.5px;color:var(--brand-1);font-family:'JetBrains Mono',ui-monospace,monospace;
}
.download-meta a{color:var(--brand-1)}

@media (max-width:1024px){
  .download-grid{grid-template-columns:repeat(2,1fr)}
  .req-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .install-steps .step-card{grid-template-columns:60px 1fr;gap:18px}
}
@media (max-width:768px){
  .download-hero{padding:120px 0 40px}
  .download-grid{grid-template-columns:1fr}
}
@media (max-width:480px){
  .req-card{padding:24px}
  .req-list li{flex-direction:column;gap:2px}
  .req-list .val{text-align:left}
  .install-steps .step-card{grid-template-columns:1fr;padding:20px}
  .install-steps .step-num{font-size:28px}
}