/* =========================================================
   下载分发页样式
   配色：信任蓝 + 深海蓝 + 洁净白
   ========================================================= */

*,*::before,*::after{box-sizing:border-box}

:root{
  --bg:        #f4f8fd;
  --ink:       #0b1c34;   /* 主文字：深海蓝 */
  --ink-soft:  #5a7392;   /* 次文字 */
  --ink-mute:  #8ea3bd;   /* 弱文字 */
  --brand:     #1a6bf0;   /* 信任蓝 */
  --brand-deep:#0e4fc6;
  --line:      rgba(16,58,116,.12);
}

html{-webkit-text-size-adjust:100%}

body{
  margin:0;
  min-height:100vh;
  min-height:100dvh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:36px 22px calc(36px + env(safe-area-inset-bottom));
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC",
              "Helvetica Neue","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* ===================== 背景光晕 ===================== */
.glow{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.glow::before,
.glow::after{content:'';position:absolute;border-radius:50%}
.glow::before{
  left:50%;top:-42%;width:130vmax;height:130vmax;transform:translateX(-50%);
  background:radial-gradient(closest-side,rgba(26,107,240,.16),rgba(26,107,240,0) 100%);
  animation:float 16s ease-in-out infinite;
}
.glow::after{
  right:-40%;bottom:-48%;width:105vmax;height:105vmax;
  background:radial-gradient(closest-side,rgba(0,163,184,.11),rgba(0,163,184,0) 100%);
  animation:float 20s ease-in-out infinite reverse;
}
@keyframes float{
  0%,100%{transform:translate3d(0,0,0) scale(1)}
  50%    {transform:translate3d(0,-3%,0) scale(1.05)}
}

/* ===================== 主舞台（无卡片） ===================== */
.stage{
  position:relative;z-index:1;
  width:min(100%,400px);
  text-align:center;
  animation:rise .8s cubic-bezier(.2,.75,.2,1) both;
}
@keyframes rise{
  from{opacity:0;transform:translateY(18px)}
  to  {opacity:1;transform:none}
}

/* 应用图标 */
/*.app-icon{*/
/*  width:80px;height:80px;*/
/*  border-radius:24px;*/
/*  margin:0 auto 24px;*/
/*  display:grid;place-items:center;*/
/*  overflow:hidden;*/
/*  background:linear-gradient(150deg,#2b7bf5,#0e4fc6);*/
/*  box-shadow:0 18px 38px -16px rgba(16,79,198,.65);*/
/*  color:#fff;*/
/*}*/
/*.app-icon svg{width:36px;height:36px}*/
/*.app-icon img{width:100%;height:100%;object-fit:cover;display:block}*/

/* 文案 */
.stage h1{
  font-size:23px;font-weight:600;
  letter-spacing:.01em;
  margin:0 0 8px;
  color:var(--ink);
}
.desc{
  font-size:14px;
  color:var(--ink-soft);
  line-height:1.55;
  margin:0 0 14px;
}
.meta-row{
  font-size:12px;
  color:var(--ink-mute);
  letter-spacing:.07em;
  margin-bottom:28px;
}

/* ===================== 按钮 ===================== */
.actions{display:grid;gap:12px}

.btn{
  display:flex;align-items:center;justify-content:center;gap:9px;
  width:100%;height:54px;
  border-radius:16px;
  font-family:inherit;
  font-size:15.5px;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease,filter .2s ease,background .2s ease,box-shadow .2s ease;
  -webkit-tap-highlight-color:transparent;
  -webkit-appearance:none;
}
.btn:active{transform:scale(.972)}
.btn svg{width:17px;height:17px;flex:none}

.btn-primary{
  background:linear-gradient(135deg,#2b7bf5,#0e4fc6);
  color:#fff;
  box-shadow:0 16px 32px -16px rgba(16,79,198,.85);
}
.btn-primary:hover{filter:brightness(1.06)}

.btn-ghost{
  background:#fff;
  color:var(--brand-deep);
  border-color:rgba(21,87,214,.28);
  box-shadow:0 8px 20px -14px rgba(16,79,198,.5);
}
.btn-ghost:hover{background:#f1f7ff}

/* 设备提示 */
.device{
  margin:20px 0 0;
  font-size:12px;
  color:var(--ink-mute);
  letter-spacing:.03em;
  line-height:1.6;
}

/* ===================== 遮罩层通用 ===================== */
.overlay{
  position:fixed;inset:0;z-index:50;
  display:flex;align-items:flex-end;justify-content:center;
  padding:16px 16px calc(16px + env(safe-area-inset-bottom));
  background:rgba(9,25,52,.42);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  opacity:0;visibility:hidden;
  transition:opacity .3s ease,visibility .3s ease;
}
.overlay.open{opacity:1;visibility:visible}

@media (min-width:640px){
  .overlay{align-items:center}
}

/* ===================== iOS 引导面板 ===================== */
.sheet{
  width:min(100%,430px);
  max-height:86vh;
  max-height:86dvh;
  display:flex;flex-direction:column;
  padding:22px 20px 20px;
  border-radius:26px;
  background:#fff;
  border:1px solid rgba(16,58,116,.08);
  box-shadow:0 44px 100px -42px rgba(6,25,60,.6);
  transform:translateY(26px) scale(.985);
  transition:transform .38s cubic-bezier(.2,.8,.2,1);
}
.overlay.open .sheet{transform:none}

.sheet-head{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.sheet-head h2{
  font-size:17px;font-weight:600;margin:0;
  letter-spacing:.02em;color:var(--ink);
}

.close-btn{
  width:32px;height:32px;flex:none;
  border-radius:50%;
  display:grid;place-items:center;
  background:transparent;
  border:1px solid var(--line);
  color:var(--ink-mute);
  font-size:16px;line-height:1;cursor:pointer;
  transition:background .2s,color .2s;
  -webkit-appearance:none;
}
.close-btn:hover{background:#f1f6fd;color:var(--ink)}

.sheet-body{
  flex:1;min-height:0;
  overflow-y:auto;
  -webkit-overflow-scrolling:touch;
  margin:16px -6px 0;
  padding:0 6px;
}
.sheet-body::-webkit-scrollbar{width:0}

/* 步骤 */
.step{
  margin-bottom:20px;
  animation:stepIn .5s cubic-bezier(.2,.8,.2,1) both;
}
@keyframes stepIn{
  from{opacity:0;transform:translateY(10px)}
  to  {opacity:1;transform:none}
}
.step:last-child{margin-bottom:6px}

.step-head{display:flex;gap:12px;align-items:flex-start}

.num{
  flex:none;width:22px;height:22px;margin-top:1px;
  border-radius:50%;
  display:grid;place-items:center;
  font-size:11.5px;font-weight:700;
  background:rgba(21,87,214,.10);
  color:var(--brand-deep);
}
.step-title{
  font-size:14.5px;font-weight:600;
  letter-spacing:.01em;line-height:1.4;
  color:var(--ink);
  text-align:left;
}
.step-desc{
  font-size:12.5px;color:var(--ink-soft);
  line-height:1.65;margin-top:4px;
  text-align:left;
}

/* 引导图槽位 */
.shot{
  margin-top:12px;
  border-radius:16px;
  overflow:hidden;
  border:1px solid var(--line);
  background:#f4f8fd;
}
.shot img{display:block;width:100%;height:auto}
.shot.is-empty{
  height:170px;
  display:grid;place-items:center;
  border-style:dashed;
  border-color:rgba(16,58,116,.20);
  color:var(--ink-mute);
  font-size:12.5px;letter-spacing:.06em;
}

.sheet-foot{
  padding-top:16px;margin-top:4px;
  border-top:1px solid var(--line);
}
.sheet-foot .btn{height:52px}
.foot-hint{
  margin:12px 0 0;
  text-align:center;
  font-size:11.5px;
  color:var(--ink-mute);
  line-height:1.6;
}

/* ===================== 微信提示 ===================== */
#wxTip{
  background:rgba(255,255,255,.94);
  -webkit-backdrop-filter:blur(20px);
  backdrop-filter:blur(20px);
}

.wx-arrow{
  position:absolute;
  top:calc(20px + env(safe-area-inset-top));
  right:24px;
  color:var(--brand);
  animation:bounce 1.7s ease-in-out infinite;
}
.wx-arrow svg{width:52px;height:52px}
@keyframes bounce{
  0%,100%{transform:translate(0,0)}
  50%    {transform:translate(5px,-5px)}
}

.wx-body{
  position:absolute;left:0;right:0;top:44%;
  transform:translateY(-50%);
  text-align:center;
  padding:0 30px;
}
.wx-body h3{
  font-size:18px;font-weight:600;
  margin:0 0 12px;letter-spacing:.02em;
  color:var(--ink);
}
.wx-body p{
  font-size:13.5px;color:var(--ink-soft);
  line-height:1.85;margin:0;
}
.wx-body b{color:var(--brand-deep);font-weight:600}
.wx-body .btn{
  width:auto;display:inline-flex;
  height:46px;padding:0 26px;
  margin-top:26px;font-size:14px;
}

/* ===================== Toast ===================== */
.toast{
  position:fixed;
  left:50%;bottom:calc(42px + env(safe-area-inset-bottom));
  transform:translate(-50%,12px);
  max-width:80vw;
  padding:11px 18px;
  border-radius:999px;
  background:rgba(11,28,52,.94);
  color:#eaf1fb;
  font-size:13px;text-align:center;
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  opacity:0;visibility:hidden;pointer-events:none;
  z-index:80;
  transition:.28s cubic-bezier(.2,.8,.2,1);
}
.toast.show{opacity:1;visibility:visible;transform:translate(-50%,0)}

/* ===================== 无障碍 ===================== */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
}