/* ============================================================
   iOS 下载页专属样式
   依赖 css/index.css 中的变量与基础组件
   ============================================================ */

/* ---------- 导航当前页标记 ---------- */
.nav-links a.is-current{
  color:var(--text);
  background:rgba(255,255,255,.08);
  position:relative;
}
.nav-links a.is-current::after{
  content:"";position:absolute;left:50%;bottom:3px;
  width:14px;height:2px;margin-left:-7px;border-radius:2px;
  background:var(--grad);
}

/* ---------- Hero 微调 ---------- */
.ios-hero{padding-bottom:70px}
.ios-hero .sub{margin-bottom:44px}

/* ---------- 下载卡 ---------- */
.dl-card{
  max-width:800px;margin:0 auto;
  border:1px solid var(--line);border-radius:22px;
  background:linear-gradient(160deg,rgba(46,230,255,.06),rgba(165,107,255,.04) 60%,transparent);
  padding:28px 30px;
  text-align:left;
}
.dl-main{display:flex;align-items:center;gap:20px;margin-bottom:22px}
.dl-icon{
  width:56px;height:56px;border-radius:16px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(46,230,255,.09);
  border:1px solid rgba(46,230,255,.22);
}
.dl-icon svg{width:26px;height:26px;stroke:var(--c1)}
.dl-name{
  font-size:17px;font-weight:680;
  letter-spacing:-.018em;margin-bottom:6px;
}
.dl-spec{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:12.5px;color:var(--muted-2);
}
.dl-spec .dot{
  width:3px;height:3px;border-radius:50%;
  background:var(--muted-2);flex-shrink:0;
}
.dl-actions{
  display:flex;gap:12px;flex-wrap:wrap;
}
.dl-actions .btn{padding:12px 24px;font-size:14.5px}

/* ---------- 三步安装 · 横向流程 ---------- */
.flow{
  display:flex;flex-direction:column;gap:0;
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.01));
  overflow:hidden;
}
.flow-item{
  display:flex;gap:26px;align-items:flex-start;
  padding:32px 34px;
  border-bottom:1px solid var(--line);
  transition:background .3s;
}
.flow-item:last-child{border-bottom:none}
.flow-item:hover{background:rgba(255,255,255,.028)}
.flow-num{
  flex-shrink:0;
  font-size:30px;font-weight:760;letter-spacing:-.04em;
  line-height:1;
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
  font-variant-numeric:tabular-nums;
  min-width:52px;
}
.flow-body h3{
  font-size:18px;font-weight:660;
  letter-spacing:-.018em;margin-bottom:10px;
}
.flow-body p{font-size:14.5px;color:var(--muted);line-height:1.75;max-width:760px}

/* ---------- 一键配置 · 双栏 ---------- */
.config-wrap{
  display:grid;grid-template-columns:1.05fr 1fr;gap:22px;
  align-items:start;
}

/* 配置预览 */
.cfg-preview{
  border:1px solid var(--line);border-radius:18px;
  overflow:hidden;
  background:rgba(3,5,10,.72);
  position:sticky;top:88px;
}
.cfg-bar{
  display:flex;align-items:center;gap:8px;
  padding:13px 16px;
  border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.03);
}
.cfg-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}
.cfg-dot.red{background:#ff5f57}
.cfg-dot.yellow{background:#febc2e}
.cfg-dot.green{background:#28c840}
.cfg-title{
  margin-left:8px;font-size:12px;color:var(--muted-2);
  font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  letter-spacing:.02em;
}
.cfg-code{
  margin:0;padding:22px 20px;
  font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  font-size:12.5px;line-height:1.85;
  color:#c6cfe0;
  overflow-x:auto;
  white-space:pre;
  tab-size:2;
}
.cfg-code .c-key{color:#7ba4ff}
.cfg-code .c-str{color:#5fd6a8}
.cfg-code .c-num{color:#ffb86b}
.cfg-code .c-cmt{color:#5a6478;font-style:italic}

/* 配置四步 */
.cfg-steps{display:flex;flex-direction:column;gap:14px}
.cfg-step{
  display:flex;gap:16px;align-items:flex-start;
  padding:22px 22px;border-radius:15px;
  border:1px solid var(--line);background:var(--card);
  transition:border-color .3s,background .3s,transform .3s cubic-bezier(.22,1,.36,1);
}
.cfg-step:hover{
  border-color:rgba(46,230,255,.28);
  background:var(--card-hi);
  transform:translateX(4px);
}
.cs-idx{
  flex-shrink:0;
  width:30px;height:30px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  font-size:12.5px;font-weight:700;
  background:rgba(46,230,255,.09);
  border:1px solid rgba(46,230,255,.22);
  color:var(--c1);
}
.cs-idx.p2{background:rgba(91,140,255,.1);border-color:rgba(91,140,255,.25);color:#7ba4ff}
.cs-idx.p3{background:rgba(165,107,255,.1);border-color:rgba(165,107,255,.25);color:#b98cff}
.cfg-step h3{
  font-size:15.5px;font-weight:650;
  letter-spacing:-.014em;margin-bottom:7px;
}
.cfg-step p{font-size:13.5px;color:var(--muted);line-height:1.72}

/* ---------- 兼容性表 ---------- */
.compat{
  border:1px solid var(--line);border-radius:18px;
  overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.01));
}
.compat-row{
  display:grid;
  grid-template-columns:1.1fr 1.2fr 1.3fr;
  gap:16px;align-items:center;
  padding:20px 28px;
  border-bottom:1px solid var(--line);
  transition:background .3s;
}
.compat-row:last-child{border-bottom:none}
.compat-row:not(.head):hover{background:rgba(255,255,255,.028)}
.compat-row.head{
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted-2);font-weight:650;
  background:rgba(255,255,255,.022);
  padding:15px 28px;
}
.cr-name{font-size:15px;font-weight:620;letter-spacing:-.012em}
.cr-req{font-size:13.5px;color:var(--muted)}
.cr-ok{
  font-size:13px;color:#3ddc97;font-weight:560;
  display:inline-flex;align-items:center;gap:8px;
}
.cr-ok::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:#3ddc97;box-shadow:0 0 8px #3ddc97;flex-shrink:0;
}

/* ---------- FAQ 折叠 ---------- */
.faq{display:flex;flex-direction:column;gap:12px}
.faq details{
  border:1px solid var(--line);border-radius:16px;
  background:var(--card);overflow:hidden;
  transition:border-color .3s,background .3s;
}
.faq details[open]{
  border-color:rgba(46,230,255,.28);
  background:var(--card-hi);
}
.faq summary{
  list-style:none;cursor:pointer;position:relative;
  padding:20px 56px 20px 24px;
  font-size:15.5px;font-weight:600;
  letter-spacing:-.012em;
  transition:color .24s;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--c1)}
.faq summary::after{
  content:"";position:absolute;right:26px;top:50%;
  width:9px;height:9px;margin-top:-6px;
  border-right:1.8px solid var(--muted);
  border-bottom:1.8px solid var(--muted);
  transform:rotate(45deg);
  transition:transform .3s cubic-bezier(.22,1,.36,1),border-color .3s;
}
.faq details[open] summary::after{
  transform:rotate(-135deg);
  margin-top:-2px;
  border-color:var(--c1);
}
.faq .ans{
  padding:0 24px 22px;
  font-size:14.5px;color:var(--muted);line-height:1.78;
  max-width:820px;
}

/* ---------- 响应式 ---------- */
@media(max-width:1000px){
  .config-wrap{grid-template-columns:1fr}
  .cfg-preview{position:static}
}

@media(max-width:960px){
  .grid.g4{grid-template-columns:repeat(2,1fr)}
  .compat-row{grid-template-columns:1fr 1fr 1fr;padding:18px 22px}
}

@media(max-width:680px){
  .ios-hero{padding-bottom:52px}
  .ios-hero .sub{margin-bottom:34px}
  .dl-card{padding:24px 20px}
  .dl-main{flex-direction:column;align-items:flex-start;gap:14px}
  .dl-actions{width:100%}
  .dl-actions .btn{width:100%;justify-content:center}
  .flow-item{padding:24px 22px;gap:18px}
  .flow-num{font-size:24px;min-width:40px}
  .cfg-code{font-size:11.5px;padding:18px 16px}
  .compat-row{grid-template-columns:1fr;gap:6px;padding:18px 20px}
  .compat-row.head{display:none}
  .cr-name{font-size:15.5px;margin-bottom:2px}
  .cr-req{font-size:13px}
  .cr-ok{margin-top:6px}
  .faq summary{padding:18px 50px 18px 20px;font-size:15px}
  .faq .ans{padding:0 20px 20px}
}