/* AcFan · acfansoft.cn — 橙蓝展台骨架 */
:root{
  --orange:#F5A31A;
  --orange-2:#FFB93B;
  --orange-deep:#D97400;
  --blue:#3F7FC4;
  --blue-soft:#E8F0FA;
  --cream:#FFF8EC;
  --cream-2:#FDF1DC;
  --ink:#1D1F26;
  --ink-2:#4A4E59;
  --line:#EEDFC4;
  --white:#fff;
  --radius:18px;
  --shadow-s:0 2px 4px rgba(64,40,0,.10);
  --shadow-m:0 12px 30px rgba(105,66,0,.12);
  --shadow-l:0 26px 60px rgba(105,66,0,.18);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  color:var(--ink);
  background:var(--cream);
  line-height:1.75;
  font-size:16px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0}
.wrap{width:min(1160px,92%);margin:0 auto}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  background:linear-gradient(135deg,var(--orange-2),var(--orange-deep));
  color:#fff;font-weight:700;font-size:16px;
  padding:14px 28px;border-radius:999px;
  box-shadow:var(--shadow-s);
  transition:transform .18s ease,box-shadow .18s ease;
}
.btn svg{width:19px;height:19px}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-m)}
.ghost{
  display:inline-flex;align-items:center;
  padding:13px 22px;border-radius:999px;
  border:2px solid rgba(29,31,38,.16);
  font-weight:600;color:var(--ink-2);
  transition:border-color .18s ease,color .18s ease;
}
.ghost:hover{border-color:var(--orange);color:var(--orange-deep)}

/* ---------- header ---------- */
.hd{
  position:sticky;top:0;z-index:60;
  background:rgba(255,248,236,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.hd.on{box-shadow:0 6px 22px rgba(105,66,0,.10)}
.hd-in{display:flex;align-items:center;gap:22px;height:66px}
.hd-brand{display:flex;align-items:center;gap:10px}
.hd-brand img{border-radius:10px;box-shadow:var(--shadow-s)}
.hd-brand strong{display:block;font-size:18px;letter-spacing:.3px;line-height:1.15}
.hd-brand small{display:block;font-size:11px;color:var(--orange-deep);letter-spacing:1.2px}
#nav{margin-left:auto;display:flex;gap:8px}
#nav a{
  padding:8px 13px;border-radius:9px;font-size:14.5px;color:var(--ink-2);
  transition:background .16s ease,color .16s ease;
}
#nav a:hover{background:var(--cream-2);color:var(--orange-deep)}
.hd-cta{
  background:var(--orange);
  color:#fff;font-weight:700;font-size:14.5px;
  padding:10px 20px;border-radius:999px;
  box-shadow:var(--shadow-s);
  transition:background .18s ease,transform .18s ease;
}
.hd-cta:hover{background:var(--orange-deep);transform:translateY(-1px)}
.hd-menu{display:none;margin-left:auto;background:none;border:0;color:var(--ink);padding:6px;cursor:pointer}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(680px 320px at 80% -10%,rgba(245,163,26,.22),transparent 70%),
    radial-gradient(520px 300px at 8% 8%,rgba(63,127,196,.13),transparent 70%),
    var(--cream);
  padding:64px 0 0;
}
.hero-in{position:relative;text-align:center;max-width:760px;margin:0 auto}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:2px;color:var(--orange-deep);
  background:#fff;border:1px solid var(--line);
  padding:6px 14px;border-radius:999px;box-shadow:var(--shadow-s);
}
.kicker i{width:7px;height:7px;border-radius:50%;background:var(--blue);display:block}
.hero h1{
  font-size:clamp(38px,6vw,62px);
  line-height:1.1;letter-spacing:-1px;
  margin:18px 0 10px;
  color:var(--ink);
}
.hero h1 span{color:var(--orange-deep)}
.lead{
  font-size:19px;font-weight:700;color:var(--blue);
  margin-bottom:18px;
}
.desc{
  font-size:15.5px;color:var(--ink-2);text-align:left;
  max-width:700px;margin:0 auto;
}
.acts{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin:26px 0 12px}
.upd{font-size:13px;color:#8A8577}
.upd time{font-weight:600;color:var(--ink-2)}

/* 展台：三卡叠放 */
.stage{
  position:relative;
  margin:34px auto 0;
  padding-bottom:72px;
  display:flex;align-items:flex-end;justify-content:center;
  min-height:400px;
}
.stage-phone{
  position:relative;z-index:3;
  width:236px;padding:11px;border-radius:34px;
  background:linear-gradient(160deg,#2A2D36,#14161C);
  box-shadow:var(--shadow-l);
}
.stage-phone::before{
  content:"";position:absolute;top:11px;left:50%;transform:translateX(-50%);
  width:64px;height:7px;border-radius:0 0 8px 8px;background:#0C0D11;
}
.stage-phone img{border-radius:25px;width:100%;height:auto}
.stage-cover,.stage-shot{
  position:absolute;bottom:86px;width:176px;padding:8px;background:#fff;
  border-radius:14px;box-shadow:var(--shadow-m);
}
.stage-cover{left:calc(50% - 330px);transform:rotate(-8deg);z-index:2}
.stage-shot{right:calc(50% - 330px);transform:rotate(7deg);z-index:1}
.stage-cover img,.stage-shot img{border-radius:8px}
.stage-cover figcaption,.stage-shot figcaption{
  font-size:11px;color:#8A8577;text-align:center;padding-top:6px;
}
.chipfloat{
  position:absolute;z-index:5;
  background:#fff;border-radius:12px;
  padding:9px 14px;font-size:12.5px;font-weight:600;color:var(--ink-2);
  box-shadow:var(--shadow-m);
  display:flex;align-items:center;gap:7px;
}
.chipfloat b{color:var(--orange-deep);font-size:15px}
.chipfloat.f1{left:calc(50% - 300px);top:26px}
.chipfloat.f2{right:calc(50% - 296px);top:96px}
.chipfloat.f2 b{color:var(--blue)}

/* 标签带 */
.tagbar{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:#fff;
  padding:14px 0;
  overflow:hidden;
}
.tagbar-in{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;font-size:13px;color:var(--ink-2)}
.tagbar-in span{
  padding:5px 13px;border-radius:999px;background:var(--cream-2);
  border:1px solid #F3E4C9;
}
.tagbar-in span:nth-child(3n+1){background:var(--blue-soft);border-color:#D7E5F5;color:#2C5F97}

/* ---------- 通用 section ---------- */
.sec{padding:74px 0}
.sec-h{max-width:720px;margin-bottom:36px}
.tag{
  display:inline-block;font-size:12px;letter-spacing:2.4px;
  color:var(--orange-deep);font-weight:700;margin-bottom:12px;
}
.sec-h h2{font-size:clamp(26px,3.4vw,36px);line-height:1.25;letter-spacing:-.5px}
.sec-h p{margin-top:12px;color:var(--ink-2);font-size:15.5px}

/* ---------- 特色：左吸顶 + 右列表 ---------- */
.feat-in{display:grid;grid-template-columns:300px 1fr;gap:56px}
.feat-side{position:sticky;top:96px;align-self:start}
.feat-side h2{font-size:clamp(26px,3.2vw,36px);line-height:1.25;margin-bottom:14px}
.feat-side p{font-size:15px;color:var(--ink-2)}
.feat-badges{margin-top:22px;display:flex;flex-wrap:wrap;gap:8px}
.feat-badges span{
  font-size:12.5px;padding:5px 12px;border-radius:8px;
  background:#fff;border:1px solid var(--line);color:var(--ink-2);
}
.feat-badges span:nth-child(even){background:var(--blue-soft);border-color:#D7E5F5;color:#2C5F97}
.feat-list{display:grid}
.feat-row{
  display:grid;grid-template-columns:64px 1fr;gap:20px;
  padding:26px 0;border-top:1px solid var(--line);
}
.feat-row:first-child{border-top:0;padding-top:0}
.feat-row .no{
  font-size:26px;font-weight:800;color:var(--orange);
  font-family:ui-monospace,Consolas,monospace;line-height:1.1;
}
.feat-row h4{font-size:19px;margin-bottom:8px;display:flex;align-items:center;gap:10px}
.feat-row h4 em{
  font-style:normal;font-size:10.5px;letter-spacing:1.6px;color:var(--blue);
  border:1px solid #CFE0F2;border-radius:5px;padding:2px 7px;
}
.feat-row p{font-size:14.8px;color:var(--ink-2)}
.feat-row:nth-child(odd) h4 em{color:var(--orange-deep);border-color:#F0DAB4}
.mini-bars{display:flex;gap:4px;margin-top:12px}
.mini-bars i{height:6px;flex:1;border-radius:3px;background:#F5E7D0}
.mini-bars i.on{background:var(--orange)}

/* ---------- 界面：马赛克 ---------- */
.show{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.mosaic{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.m-item{
  background:var(--cream);border-radius:var(--radius);
  padding:14px;box-shadow:var(--shadow-s);
  border:1px solid var(--line);
}
.m-item.big{grid-column:span 1}
.m-item img{border-radius:10px;width:100%;height:auto}
.m-item figcaption{font-size:13.5px;color:var(--ink-2);padding:12px 4px 2px}
.m-item figcaption b{display:block;color:var(--ink);font-size:15px;margin-bottom:4px}
/* ---------- 指南：三步卡片 ---------- */
.guide{background:var(--cream-2);border-top:1px solid var(--line)}
.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.g-step{
  background:var(--ink);color:#fff;border-radius:var(--radius);
  padding:24px 22px;position:relative;overflow:hidden;
}
.g-step:nth-child(2){background:var(--blue)}
.g-step:nth-child(3){background:var(--orange-deep)}
.g-step .gn{
  font-family:ui-monospace,Consolas,monospace;font-size:12px;
  letter-spacing:2px;opacity:.7;
}
.g-step h4{font-size:17px;margin:8px 0 8px}
.g-step p{font-size:14px;opacity:.9}
.quote{
  margin-top:26px;border-left:5px solid var(--orange);
  background:var(--cream-2);border-radius:0 14px 14px 0;
  padding:20px 24px;
}
.quote p{font-size:15px;color:var(--ink-2)}
.quote cite{display:block;margin-top:10px;font-style:normal;font-size:13px;color:#8A8577}

/* ---------- FAQ：单列 + 侧栏 ---------- */
.faq-in{display:grid;grid-template-columns:1fr 288px;gap:52px;align-items:start}
.faq-side{
  position:sticky;top:96px;
  background:var(--ink);color:#fff;border-radius:var(--radius);
  padding:26px 24px;
}
.faq-side h4{font-size:16px;margin-bottom:10px;color:var(--orange-2)}
.faq-side p{font-size:13.6px;color:rgba(255,255,255,.78)}
.faq-side .dot-line{height:1px;background:rgba(255,255,255,.15);margin:16px 0}
.qa-row{
  display:grid;grid-template-columns:46px 1fr;gap:16px;
  padding:24px 0;border-bottom:1px solid var(--line);
}
.qa-row:first-of-type{border-top:1px solid var(--line)}
.qa-row .q{
  width:38px;height:38px;border-radius:12px;
  background:var(--cream-2);color:var(--orange-deep);
  display:grid;place-items:center;font-weight:800;font-size:14px;
  font-family:ui-monospace,Consolas,monospace;
}
.qa-row h3{font-size:17px;margin-bottom:7px}
.qa-row p{font-size:14.6px;color:var(--ink-2)}

/* ---------- 评价：卡片网格 ---------- */
.rev{background:var(--cream-2)}
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rv-card{
  background:#fff;border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow-s);
  border-top:4px solid var(--orange);
}
.rv-card:nth-child(3n+2){border-top-color:var(--blue)}
.rv-card:nth-child(3n){border-top-color:var(--orange-deep)}
.rv-who{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.rv-who i{
  width:36px;height:36px;border-radius:50%;
  background:var(--orange);color:#fff;font-style:normal;
  display:grid;place-items:center;font-weight:700;font-size:14px;flex:none;
}
.rv-who b{font-size:14.5px;display:block;line-height:1.3}
.rv-who time{font-size:11.5px;color:#9B9587;display:block}
.stars{margin-left:auto;font-size:12px;color:var(--orange);letter-spacing:1px}
.rv-card p{font-size:14.2px;color:var(--ink-2)}

/* ---------- 下载带 ---------- */
.dl{
  background:
    radial-gradient(500px 260px at 88% 0%,rgba(255,255,255,.20),transparent 70%),
    linear-gradient(120deg,#F5A31A,#D97400 62%,#B85A00);
  color:#fff;padding:64px 0;
}
.dl-in{display:flex;align-items:center;gap:34px;flex-wrap:wrap}
.dl-logo{width:74px;height:74px;border-radius:18px;box-shadow:0 14px 34px rgba(94,44,0,.35)}
.dl-txt{flex:1;min-width:280px}
.dl-txt h2{font-size:clamp(26px,3.6vw,38px);line-height:1.2}
.dl-txt p{margin-top:12px;font-size:14.6px;color:rgba(255,255,255,.9);max-width:640px}
.dl .btn{
  background:#fff;color:var(--orange-deep);
  box-shadow:0 14px 32px rgba(94,44,0,.28);
}
.dl-chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}
.dl-chips span{
  font-size:12.5px;padding:4px 12px;border-radius:999px;
  background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.34);
}

/* ---------- footer ---------- */
.ft{background:#161B2B;color:rgba(255,255,255,.72);padding:52px 0 30px}
.ft-in{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px}
.ft-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px;color:#fff}
.ft-brand img{border-radius:8px}
.ft-brand strong{font-size:17px}
.ft p{font-size:13.6px;line-height:1.8}
.ft-col h4{font-size:13.5px;color:#fff;margin-bottom:12px;letter-spacing:.5px}
.ft-col a,.ft-col span{display:block;font-size:13.4px;padding:4px 0;color:rgba(255,255,255,.66)}
.ft-col a:hover{color:var(--orange-2)}
.ft-copy{
  margin-top:34px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);
  font-size:12.6px;line-height:1.9;color:rgba(255,255,255,.55);
}

/* ---------- backtop ---------- */
.backtop{
  position:fixed;right:24px;bottom:88px;z-index:80;
  width:44px;height:44px;border-radius:12px;border:0;
  background:var(--ink);color:#fff;
  display:grid;place-items:center;cursor:pointer;
  opacity:0;pointer-events:none;transform:translateY(10px);
  transition:opacity .2s ease,transform .2s ease;
}
.backtop.on{opacity:1;pointer-events:auto;transform:none}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .feat-in{grid-template-columns:1fr;gap:30px}
  .feat-side{position:static}
  .faq-in{grid-template-columns:1fr;gap:26px}
  .faq-side{position:static}
  .rev-grid{grid-template-columns:repeat(2,1fr)}
  .stage-cover{left:calc(50% - 300px)}
  .stage-shot{right:calc(50% - 300px)}
  .ft-in{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  #nav{
    display:none;position:absolute;left:4%;right:4%;top:66px;
    flex-direction:column;background:#fff;border-radius:14px;
    box-shadow:var(--shadow-m);padding:10px;gap:2px;
  }
  #nav.open{display:flex}
  .hd-menu{display:block}
  .hd-cta{margin-left:0}
  #nav a{padding:11px 12px}
  .hd-in{gap:10px}
  .hero{padding-top:44px}
  .desc{font-size:15px}
  .stage{min-height:330px;padding-bottom:56px}
  .stage-phone{width:192px;padding:9px;border-radius:28px}
  .stage-cover,.stage-shot{width:132px;bottom:72px}
  .stage-cover{left:2px}
  .stage-shot{right:2px}
  .chipfloat.f1{left:0;top:auto;bottom:196px}
  .chipfloat.f2{right:0;top:auto;bottom:140px}
  .sec{padding:54px 0}
  .mosaic{
    display:flex;overflow-x:auto;gap:16px;
    scroll-snap-type:x mandatory;padding-bottom:10px;
    margin:0 -4%;padding-left:4%;padding-right:4%;
  }
  .m-item{flex:0 0 78%;scroll-snap-align:center}
  .guide-grid{grid-template-columns:1fr}
  .rev-grid{grid-template-columns:1fr}
  .dl-in{gap:20px}
  .dl .btn{width:100%;justify-content:center}
  .ft-in{grid-template-columns:1fr;gap:26px}
  .backtop{width:40px;height:40px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}