/* ============================================================
   TestFlight 页面专属样式
   依赖 css/index.css 中的变量与基础组件
   ============================================================ */

/* ---------- 导航当前页标记 ---------- */
.nav-cta.is-current{
  position:relative;
  box-shadow:0 0 0 1px rgba(46,230,255,.35),0 8px 30px rgba(46,230,255,.35);
}
.nav-cta.is-current::after{
  content:"";position:absolute;top:-3px;right:-3px;
  width:9px;height:9px;border-radius:50%;
  background:var(--c1);
  border:2px solid var(--bg);
  box-shadow:0 0 10px var(--c1);
  animation:pulse 2.4s ease-in-out infinite;
}

/* ---------- Hero 微调 ---------- */
.tf-hero{padding-bottom:76px}
.tf-hero .sub{margin-bottom:38px}

/* ---------- 通道状态条 ---------- */
.tf-status{
  display:grid;grid-template-columns:repeat(3,1fr);
  margin-top:54px;text-align:left;
  border:1px solid var(--line);border-radius:18px;
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.012));
  overflow:hidden;
}
.st{
  display:flex;align-items:center;gap:14px;
  padding:24px 26px;
  border-right:1px solid var(--line);
}
.st:last-child{border-right:none}
.st-dot{
  width:9px;height:9px;border-radius:50%;flex-shrink:0;
  background:#3ddc97;box-shadow:0 0 12px #3ddc97;
  animation:pulse 2.4s ease-in-out infinite;
}
.st-dot.blue{background:var(--c1);box-shadow:0 0 12px var(--c1)}
.st-dot.violet{background:var(--c3);box-shadow:0 0 12px var(--c3)}
.st-k{
  font-size:12px;color:var(--muted-2);
  letter-spacing:.06em;margin-bottom:3px;
}
.st-v{font-size:14.5px;font-weight:600;color:var(--text);letter-spacing:-.008em}

/* ---------- 三步直装 ---------- */
.steps{
  display:grid;grid-template-columns:repeat(3,1fr);gap:18px;
}
.step{
  position:relative;
  padding:34px 28px;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--card);
  transition:transform .34s cubic-bezier(.22,1,.36,1),border-color .34s,background .34s;
}
.step:hover{
  transform:translateY(-4px);
  border-color:var(--line-hi);
  background:var(--card-hi);
}
.step-num{
  display:block;font-size:11.5px;font-weight:700;
  letter-spacing:.16em;color:var(--c1);
  margin-bottom:18px;
}
.step h3{
  font-size:17.5px;font-weight:650;
  letter-spacing:-.015em;margin-bottom:11px;
}
.step p{font-size:14.5px;color:var(--muted);line-height:1.72}

/* ---------- 构建时间线 ---------- */
.timeline{position:relative;padding-left:38px}
.timeline::before{
  content:"";position:absolute;
  left:7px;top:10px;bottom:10px;width:1px;
  background:linear-gradient(180deg,
    rgba(46,230,255,.65),
    rgba(91,140,255,.4) 45%,
    rgba(165,107,255,.28) 75%,
    transparent);
}
.tl-item{position:relative;padding-bottom:36px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-38px;top:6px;
  width:15px;height:15px;border-radius:50%;
  background:var(--bg);
  border:2px solid rgba(46,230,255,.5);
  box-shadow:0 0 14px rgba(46,230,255,.28);
  transition:border-color .3s,box-shadow .3s;
}
.tl-item:hover::before{border-color:var(--c1);box-shadow:0 0 20px rgba(46,230,255,.5)}
.tl-item.now::before{
  background:var(--c1);border-color:var(--c1);
  box-shadow:0 0 22px var(--c1);
}
.tl-head{
  display:flex;align-items:baseline;gap:12px;
  flex-wrap:wrap;margin-bottom:8px;
}
.tl-ver{
  font-size:16.5px;font-weight:700;
  letter-spacing:-.012em;
  font-variant-numeric:tabular-nums;
}
.tl-date{
  font-size:12.5px;color:var(--muted-2);
  font-variant-numeric:tabular-nums;
}
.tl-badge{
  font-size:11px;font-weight:650;letter-spacing:.08em;
  color:#04060c;background:var(--grad);
  padding:3px 11px;border-radius:999px;
}
.tl-item p{font-size:14.5px;color:var(--muted);line-height:1.72;max-width:720px}

/* ---------- 系统适配矩阵 ---------- */
.os-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.os{
  padding:26px 22px;border-radius:16px;
  border:1px solid var(--line);background:var(--card);
  transition:border-color .3s,background .3s,transform .3s cubic-bezier(.22,1,.36,1);
}
.os:hover{
  border-color:rgba(46,230,255,.3);
  background:var(--card-hi);
  transform:translateY(-3px);
}
.os-name{
  font-size:15.5px;font-weight:650;
  letter-spacing:-.014em;margin-bottom:6px;
}
.os-meta{font-size:12.5px;color:var(--muted-2);line-height:1.55}
.os-ok{
  display:inline-flex;align-items:center;gap:7px;
  margin-top:14px;font-size:12px;font-weight:600;color:#3ddc97;
}
.os-ok::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:#3ddc97;box-shadow:0 0 8px #3ddc97;
}

/* ---------- 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:960px){
  .tf-status{grid-template-columns:1fr}
  .st{border-right:none;border-bottom:1px solid var(--line)}
  .st:last-child{border-bottom:none}
  .steps{grid-template-columns:1fr 1fr}
  .os-grid{grid-template-columns:1fr 1fr}
}

@media(max-width:680px){
  .tf-hero{padding-bottom:56px}
  .tf-status{margin-top:40px}
  .steps{grid-template-columns:1fr}
  .os-grid{grid-template-columns:1fr}
  .timeline{padding-left:30px}
  .tl-item::before{left:-30px;width:13px;height:13px}
  .faq summary{padding:18px 50px 18px 20px;font-size:15px}
  .faq .ans{padding:0 20px 20px}
}