/* 异次元 - 二次元漫画与番剧 */
:root{
  --violet:#16130E;
  --violet-2:#000000;
  --violet-soft:#FFF6D9;
  --violet-pale:#FFFCF0;
  --lime:#FFD427;
  --ink:#16130E;
  --gray:#6E6353;
  --line:#EADFC2;
  --card:#FFFFFF;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  color:var(--ink);background:var(--violet-pale);line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{width:min(1100px,92%);margin:0 auto}
h1,h2,h3,h4{line-height:1.3}

/* header */
.hd{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.93);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.hd-in{display:flex;align-items:center;gap:22px;height:70px}
.hd-brand{display:flex;align-items:center;gap:11px}
.hd-brand img{border-radius:10px}
.hd-brand b{display:block;font-size:17px;letter-spacing:.04em;color:var(--violet)}
.hd-brand small{display:block;font-size:10.5px;color:var(--gray);letter-spacing:.12em}
.nav{display:flex;gap:6px;margin-left:auto}
.nav a{
  font-size:14px;color:#6E6353;padding:7px 12px;border-radius:7px;transition:.2s;
}
.nav a:hover{background:var(--violet-soft);color:var(--violet)}
.nav-toggle{display:none;background:none;border:0;color:var(--violet);cursor:pointer;padding:6px}
.cta{
  background:var(--lime);color:var(--ink);font-weight:800;font-size:14px;
  padding:10px 20px;border-radius:7px;
  box-shadow:0 8px 18px rgba(108,77,246,.2);
  transition:.2s;
}
.cta:hover{transform:translateY(-2px);background:#FFC400}

/* hero */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(108deg,#FFFCF0 0%,#FFFCF0 58%,#16130E 58%,#16130E 100%);
  padding:64px 0 78px;
}
.hero-in{position:relative;display:grid;grid-template-columns:1.04fr .96fr;gap:46px;align-items:center}
.kick{
  display:inline-block;font-size:12px;letter-spacing:.16em;color:var(--violet);
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:5px 14px;margin-bottom:18px;
}
h1{font-size:clamp(44px,6.6vw,74px);font-weight:800;color:var(--ink);letter-spacing:.02em}
h1 span{color:var(--violet);position:relative}
h1 span::after{
  content:"";position:absolute;left:0;right:0;bottom:6px;height:10px;
  background:var(--lime);z-index:-1;
}
.lead{font-size:19px;font-weight:600;color:#3A3227;margin:12px 0 14px}
.desc{font-size:15px;color:#6E6353;max-width:33em}
.acts{display:flex;align-items:center;gap:16px;margin:26px 0 24px}
.btn{
  display:inline-flex;align-items:center;gap:9px;
  background:var(--violet);color:#fff;font-weight:700;font-size:15px;
  padding:14px 26px;border-radius:7px;
  box-shadow:0 10px 24px rgba(108,77,246,.3);
  transition:.2s;
}
.btn svg{width:18px;height:18px}
.btn:hover{transform:translateY(-2px);background:var(--violet-2)}
.ghost{font-size:14px;font-weight:600;color:var(--violet);border-bottom:1.5px dashed var(--violet);padding-bottom:2px}
.ghost:hover{color:var(--violet-2)}
.facts{list-style:none;display:flex;gap:10px;flex-wrap:wrap}
.facts li{
  background:#fff;border:1px solid var(--line);border-radius:7px;
  padding:10px 14px;min-width:112px;
}
.facts b{display:block;font-size:14px;color:var(--violet)}
.facts span{font-size:11.5px;color:var(--gray)}

/* hero strip */
.strip{position:relative;display:flex;gap:16px;justify-content:flex-end;align-items:flex-start}
.roll{
  width:58%;border-radius:14px;overflow:hidden;
  border:5px solid rgba(255,255,255,.92);
  box-shadow:0 24px 46px rgba(20,10,50,.35);
}
.roll img{width:100%;height:440px;object-fit:cover;object-position:top center}
.strip-side{display:grid;gap:10px;align-content:start;padding-top:6px}
.dot{width:7px;height:22px;border-radius:4px;background:rgba(255,255,255,.35);display:block}
.dot.on{background:var(--lime)}
.strip-side p{font-size:12px;color:#FFF3CC;line-height:1.6;margin:4px 0 2px}
.strip-side p small{color:#CDBB8E;font-size:11px}
.mini{
  width:104px;border-radius:10px;overflow:hidden;
  border:4px solid rgba(255,255,255,.92);box-shadow:0 14px 28px rgba(20,10,50,.3);
}
.tagfl{
  position:absolute;left:0;bottom:-14px;
  background:var(--lime);color:var(--ink);font-size:12px;font-weight:800;
  padding:7px 14px;border-radius:7px;
}

/* sections */
.sec{padding:76px 0;background:var(--violet-pale)}
.sec.violet{background:var(--violet-soft)}
.sh{margin-bottom:38px;max-width:44em}
.eyebrow{
  display:inline-block;font-size:11px;letter-spacing:.24em;
  color:var(--violet-2);background:#fff;border-radius:999px;padding:4px 12px;margin-bottom:12px;
}
.sec.violet .eyebrow{background:#fff}
.sh h2{font-size:clamp(25px,3.3vw,33px);color:var(--ink);font-weight:800}
.sh h2::after{content:"";display:block;width:44px;height:3px;background:var(--lime);margin-top:10px}
.sh p{font-size:14px;color:var(--gray);margin-top:10px}

/* features */
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.tile{
  background:var(--card);border-radius:12px;padding:22px 20px;
  border:1px solid var(--line);
  box-shadow:0 8px 22px rgba(36,28,61,.05);
  transition:.22s;
}
.tile:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(36,28,61,.11);border-color:#E5D6AC}
.ti{
  display:grid;place-items:center;width:42px;height:42px;border-radius:9px;
  background:var(--lime);color:var(--ink);margin-bottom:12px;
}
.ti svg{width:20px;height:20px}
.tile h4{font-size:16.5px;color:var(--ink);margin-bottom:6px}
.tile p{font-size:13.5px;color:#6E6353}

/* screens */
.cols{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start}
.col{
  background:#fff;border-radius:14px;padding:10px 10px 14px;
  box-shadow:0 14px 30px rgba(36,28,61,.1);
}
.col img{width:100%;height:300px;object-fit:cover;object-position:top center;border-radius:8px}
.col.lift{margin-top:-22px;box-shadow:0 20px 38px rgba(36,28,61,.18);border:2px solid var(--lime)}
.col.lift img{height:340px}
.col figcaption{font-size:12.5px;color:var(--gray);margin-top:10px;padding:0 4px}
.col figcaption b{display:block;color:var(--violet);font-size:14px;margin-bottom:2px}

/* guide */
.steps{
  list-style:none;display:grid;gap:14px;position:relative;
  padding-left:26px;border-left:2px dashed #E5D6AC;
}
.steps li{
  position:relative;display:grid;grid-template-columns:46px 1fr;gap:12px;align-items:center;
  background:#fff;border-radius:10px;padding:14px 18px;
  border:1px solid var(--line);
}
.steps li::before{
  content:"";position:absolute;left:-33px;top:50%;width:12px;height:12px;
  margin-top:-6px;border-radius:50%;background:var(--lime);border:2px solid #fff;
}
.steps b{
  font-size:13px;font-weight:800;color:var(--violet);
  width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
  background:var(--violet-soft);
}
.steps span{font-size:14.5px;color:#3A3227}
.gnote{
  margin-top:18px;font-size:13px;color:#3A3227;
  background:#fff;border-radius:8px;padding:12px 16px;
  border-left:3px solid var(--violet);
}

/* faq */
.qa{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.q{
  background:#fff;border-radius:10px;padding:18px 20px;
  border:1px solid var(--line);
}
.q h3{
  font-size:15.5px;color:var(--ink);display:flex;gap:9px;align-items:baseline;
}
.q h3::before{
  content:"?";color:var(--ink);background:var(--lime);font-weight:800;font-size:12px;
  width:18px;height:18px;border-radius:5px;display:grid;place-items:center;flex:0 0 auto;
  line-height:1;
}
.q p{font-size:13.5px;color:#6E6353;margin-top:7px;padding-left:27px}

/* reviews */
.bubbles{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.bub{
  background:#fff;border-radius:10px;padding:20px;
  border-top:3px solid var(--violet);
  box-shadow:0 12px 26px rgba(36,28,61,.08);
}
.bub blockquote{font-size:13.8px;color:#3A3227;line-height:1.8}
.who{
  display:flex;align-items:center;gap:8px;margin-top:14px;
  padding-top:10px;border-top:1px dashed var(--line);
  font-size:11.5px;color:var(--gray);
}
.who i{
  font-style:normal;width:26px;height:26px;border-radius:7px;
  display:grid;place-items:center;background:var(--lime);color:var(--ink);
  font-size:12px;font-weight:700;
}

/* get */
.get{
  background:linear-gradient(150deg,var(--violet) 0%,#000000 72%,#B89A4A 100%);
  color:#fff;padding:66px 0 74px;
}
.get-in{display:grid;justify-items:center;text-align:center;gap:13px}
.get img{border-radius:12px;background:#fff;padding:3px}
.get h2{font-size:clamp(25px,3.5vw,34px);font-weight:800}
.get h2 em{font-style:normal;color:var(--lime)}
.get p{font-size:14.5px;color:#F5EBCF;max-width:40em}
.chips{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:4px 0 8px}
.chips span{
  font-size:12px;color:#FFF3CC;border:1px solid rgba(255,255,255,.35);
  border-radius:5px;padding:5px 12px;
}
.get .btn{background:var(--lime);color:var(--ink);box-shadow:0 12px 26px rgba(0,0,0,.18)}
.get .btn:hover{background:#FFC400}

/* footer */
.ft{background:#FFF6D9;color:#6E6353;padding:42px 0 28px;font-size:13px}
.ft-in{display:grid;gap:14px}
.ft-l{display:flex;align-items:center;gap:10px;color:var(--violet);font-size:16px}
.ft-l img{border-radius:8px}
.ft p{max-width:52em;line-height:1.8}
.ft-nav{display:flex;gap:18px;flex-wrap:wrap;padding:12px 0;border-top:1px solid #EFE4C8;border-bottom:1px solid #EFE4C8}
.ft-nav a:hover{color:var(--violet-2)}
.ft-c{color:#7E7568;font-size:12px;line-height:1.9}

/* backtop */
.backtop{
  position:fixed;right:22px;bottom:86px;z-index:50;width:42px;height:42px;
  display:grid;place-items:center;border:0;border-radius:9px;
  background:var(--violet);color:#fff;cursor:pointer;
  box-shadow:0 10px 22px rgba(108,77,246,.3);
  opacity:0;pointer-events:none;transition:.25s;
}
.backtop.show{opacity:1;pointer-events:auto}

@media (max-width:960px){
  .hero{background:linear-gradient(170deg,#FFFCF0 0%,#FFF9E6 100%)}
  .hero-in{grid-template-columns:1fr;gap:36px}
  .strip{justify-content:center}
  .roll img{height:400px}
  .tiles{grid-template-columns:1fr 1fr}
  .cols{grid-template-columns:1fr 1fr}
  .col.lift{margin-top:0}
  .col.lift img{height:300px}
  .qa{grid-template-columns:1fr}
  .bubbles{grid-template-columns:1fr}
  .nav{
    position:fixed;left:0;right:0;top:70px;
    background:#fff;flex-direction:column;gap:0;
    padding:8px 0 14px;border-bottom:1px solid var(--line);
    display:none;
  }
  .nav.open{display:flex}
  .nav a{border-radius:0;padding:12px 6%}
  .nav-toggle{display:block;margin-left:auto}
  .cta{padding:9px 16px;font-size:13px}
}
@media (max-width:600px){
  .hero{padding:44px 0 58px}
  .sec{padding:52px 0}
  .tiles{grid-template-columns:1fr}
  .cols{grid-template-columns:1fr}
  .roll{width:64%}
  .roll img{height:330px}
  .facts li{min-width:calc(50% - 5px)}
  h1{font-size:clamp(38px,11vw,52px)}
}
.mini img{height:190px;object-fit:cover;object-position:top center}

/* talkmaker - 亮黄纸感 · 剧本卡首屏 */
:root{
  --ink:#16130E;
  --ink2:#3A3227;
  --muted:#6E6353;
  --yellow:#FFD427;
  --deep:#E8B400;
  --red:#E23B2E;
  --bg:#FFFCF0;
  --bg2:#FFF7DB;
  --line:#EAE0C6;
}
body{background:var(--bg);color:var(--ink)}

.hd{background:rgba(255,252,240,.95);border-bottom:2px solid var(--ink)}
.hd-brand b{color:var(--ink);letter-spacing:-.02em}
.cta{background:var(--ink);color:var(--yellow);border-radius:6px;box-shadow:4px 4px 0 var(--yellow)}
.cta:hover{transform:translate(-1px,-1px);box-shadow:5px 5px 0 var(--yellow)}

/* hero */
.hero{
  position:relative;overflow:hidden;padding:56px 0 100px;
  background:
    repeating-linear-gradient(0deg,transparent 0 39px,rgba(232,180,0,.13) 39px 40px),
    radial-gradient(560px 420px at 88% 4%,rgba(255,212,39,.55),transparent 70%),
    var(--bg);
}
.hero-in{display:grid;grid-template-columns:1.02fr .98fr;gap:36px;align-items:center}
.kick{background:var(--ink);border-color:var(--ink);color:var(--yellow);letter-spacing:.08em;border-radius:3px}
h1{font-size:clamp(46px,6.4vw,76px);line-height:.98;letter-spacing:-.045em;color:var(--ink)}
h1 span{
  color:var(--ink);display:inline-block;padding:0 .04em;
  background:linear-gradient(transparent 58%,var(--yellow) 58%,var(--yellow) 92%,transparent 92%);
}
h1 span::after{display:none}
.lead{font-size:20px;color:var(--ink2);margin:14px 0 12px;font-weight:700}
.desc{font-size:15px;color:var(--muted);max-width:33em}
.acts{margin:26px 0 22px}
.btn{background:var(--ink);color:var(--yellow);border-radius:6px;box-shadow:5px 5px 0 var(--deep)}
.btn:hover{transform:translate(-1px,-1px);box-shadow:6px 6px 0 var(--deep)}
.ghost{color:var(--ink);border-bottom:2px solid var(--yellow)}
.facts{gap:10px}
.facts li{
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--yellow);
  border-radius:2px;padding:11px 12px 10px;
}
.facts b{color:var(--ink);font-size:13px}
.facts span{color:var(--muted);font-size:11.5px}

/* stage：剧本卡 + 手机 */
.stage{position:relative;height:600px}
.script{
  position:absolute;left:2%;top:34px;width:296px;height:432px;z-index:1;
  background:#FFFDF6;border:1px solid #E6DAB8;border-radius:4px;
  transform:rotate(-6deg);box-shadow:0 22px 44px rgba(80,60,10,.16);
  padding:32px 24px 20px;font-size:13px;color:#4A3F2D;
}
.script::before{content:"";position:absolute;left:0;right:0;top:0;height:6px;background:var(--yellow)}
.sc-h{font-weight:800;letter-spacing:.14em;color:#8A6B00;font-size:12px;border-bottom:1px dashed #DCCFA8;padding-bottom:10px;margin-bottom:12px}
.sc-l{font-size:12px;color:#8B7A5C}
.sc-l b{color:var(--ink)}
.sc-q{margin-top:12px;padding-left:12px;border-left:2px solid var(--yellow);font-size:13.5px;color:#2C2418;line-height:1.7}
.sc-d{margin-top:12px;font-size:11.5px;color:#9A8862;letter-spacing:.04em}
.sc-n{margin-top:14px;padding-top:12px;border-top:1px dashed #DCCFA8;font-size:11px;color:#A08D63;letter-spacing:.06em}
.tape{position:absolute;width:74px;height:22px;background:rgba(255,212,39,.72);border:1px dashed rgba(160,120,0,.35)}
.t1{left:-18px;top:-10px;transform:rotate(-18deg)}
.t2{right:-16px;bottom:26px;transform:rotate(-12deg)}
.phone{
  position:absolute;right:0;top:56px;width:252px;height:524px;border-radius:34px;
  padding:9px;background:#fff;border:2px solid var(--ink);z-index:2;
  box-shadow:10px 12px 0 rgba(255,212,39,.9),0 26px 50px rgba(60,45,10,.18);
  transform:rotate(2deg);
}
.phone img{width:100%;height:100%;object-fit:cover;object-position:top center;border-radius:26px}
.mtag{
  position:absolute;z-index:3;left:24%;top:2px;background:var(--red);color:#fff;
  font-weight:800;font-size:12px;letter-spacing:.1em;padding:7px 13px;
  transform:rotate(-4deg);box-shadow:0 8px 18px rgba(226,59,46,.28);
}
.fchip{
  position:absolute;z-index:3;background:#fff;border:1px solid var(--ink);border-radius:2px;
  font-size:11.5px;font-weight:700;color:var(--ink);padding:8px 13px;
  box-shadow:4px 4px 0 var(--yellow);
}
.c1{left:0;bottom:46px}

/* sections */
.sec{background:var(--bg)}
.sec.soft{background:var(--bg2)}
.eyebrow{background:var(--yellow);color:var(--ink);border-radius:2px;font-weight:800;border-color:var(--yellow)}
.sh h2{color:var(--ink);letter-spacing:-.02em}
.sh h2::after{background:var(--ink);height:4px;width:52px}
.sh p{color:var(--muted)}

/* features：硬边卡片 + 描边数字 */
.grid6{display:grid;grid-template-columns:1fr 1fr;gap:22px 24px}
.g6{
  position:relative;background:#fff;border:2px solid var(--ink);border-radius:3px;
  padding:22px 22px 20px 92px;box-shadow:6px 6px 0 rgba(255,212,39,.9);
  transition:transform .16s ease,box-shadow .16s ease;
}
.g6:hover{transform:translate(-2px,-2px);box-shadow:8px 8px 0 var(--yellow)}
.gn{
  position:absolute;left:16px;top:16px;font-size:44px;font-weight:900;line-height:1;
  color:transparent;-webkit-text-stroke:1.6px var(--deep);letter-spacing:-.06em;
}
.g6 h4{font-size:17.5px;color:var(--ink)}
.g6 p{font-size:13.4px;color:var(--muted);margin-top:6px;line-height:1.8}

/* screens：拍立得相框 */
.frames{display:grid;grid-template-columns:1fr 1fr;gap:36px;padding:10px 6px 0}
.frame{
  position:relative;background:#fff;border:1px solid #E9DEBF;border-radius:3px;
  padding:14px 14px 18px;box-shadow:0 18px 36px rgba(80,60,10,.12);
}
.frame:nth-child(1){transform:rotate(-1.8deg)}
.frame:nth-child(2){transform:rotate(1.6deg)}
.frame::before{
  content:"";position:absolute;left:50%;top:-11px;width:78px;height:22px;margin-left:-39px;
  background:rgba(255,212,39,.8);border:1px dashed rgba(160,120,0,.4);transform:rotate(-2deg);
}
.frame img{width:100%;height:380px;object-fit:cover;object-position:top center;border:1px solid #EFE6CD;border-radius:2px}
.frame figcaption{padding-top:14px}
.frame b{
  display:inline-block;font-size:16.5px;color:var(--ink);
  background:linear-gradient(transparent 62%,var(--yellow) 62%);
}
.frame span{display:block;font-size:13.4px;color:var(--muted);margin-top:7px;line-height:1.8}

/* guide：场次单 */
.scenes{list-style:none;position:relative;margin-left:8px;padding-left:30px;border-left:2px dashed #E0D2AC}
.scenes li{position:relative;padding:0 0 24px}
.scenes li:last-child{padding-bottom:0}
.scenes li::before{
  content:"";position:absolute;left:-37px;top:6px;width:12px;height:12px;border-radius:50%;
  background:var(--yellow);border:2px solid var(--ink);
}
.scenes b{
  display:inline-block;font-size:11px;letter-spacing:.12em;background:var(--ink);
  color:var(--yellow);padding:4px 9px;border-radius:2px;margin-bottom:8px;
}
.scenes span{display:block;font-size:14.4px;color:var(--ink2);line-height:1.75}
.gnote{background:#fff;border-left:3px solid var(--yellow);color:var(--muted)}

/* faq：黑描边卡 + 浮起序号 */
.qa{display:grid;grid-template-columns:1fr 1fr;gap:28px 26px}
.q{
  position:relative;background:#fff;border:2px solid var(--ink);border-radius:3px;
  padding:26px 20px 18px;box-shadow:5px 5px 0 rgba(255,212,39,.95);
}
.qt{
  position:absolute;left:18px;top:-14px;background:var(--ink);color:var(--yellow);
  font-size:11.5px;font-weight:800;letter-spacing:.14em;padding:5px 10px;border-radius:2px;
}
.q h3{font-size:15.5px;color:var(--ink)}
.q p{font-size:13.4px;color:var(--muted);margin-top:6px;line-height:1.8}

/* reviews：黄底黑边 */
.sec.band{background:var(--yellow)}
.sec.band .eyebrow{background:var(--ink);color:var(--yellow);border-color:var(--ink)}
.sec.band .sh p{color:#5A4A10}
.rvs{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rc{
  position:relative;background:var(--bg);border:2px solid var(--ink);border-radius:3px;
  padding:26px 20px 16px;box-shadow:6px 6px 0 rgba(0,0,0,.18);overflow:hidden;
}
.rc::before{
  content:"“";position:absolute;right:14px;top:0;font-size:56px;line-height:1.1;
  color:var(--yellow);font-family:Georgia,serif;
}
.rc blockquote{font-size:13.8px;color:#332B1E;line-height:1.85}
.who{border-top:1px dashed #D8C89A;color:#7E6C4B}
.who i{background:var(--ink);color:var(--yellow);border-radius:2px}

/* get */
.get{background:var(--ink)}
.get h2{color:#fff}
.get h2 em{color:var(--yellow);font-style:normal}
.get p{color:#CDBFA4}
.get .btn{background:var(--yellow);color:var(--ink);box-shadow:5px 5px 0 rgba(255,255,255,.22)}
.get .btn:hover{box-shadow:6px 6px 0 rgba(255,255,255,.3)}
.chips span{color:#F2E4C2;border-color:rgba(255,212,39,.5)}

/* footer */
.ft{background:var(--bg2);color:var(--muted);border-top:2px solid var(--ink)}
.ft-l{color:var(--ink)}
.ft-nav{border-color:#E3D6AE}
.ft-c{color:#8B7A5C}
.backtop{background:var(--ink);color:var(--yellow);border-radius:3px}

@media (max-width:960px){
  .hero-in{grid-template-columns:1fr;gap:26px}
  .stage{height:560px;width:100%;max-width:460px;margin:0 auto}
  .script{width:250px;height:372px;left:0;top:26px;padding:26px 18px 16px}
  .phone{width:212px;height:442px;top:48px;right:4px}
  .grid6{grid-template-columns:1fr 1fr}
  .frame img{height:320px}
  .rvs{grid-template-columns:1fr}
  .nav{background:var(--bg)}
}
@media (max-width:700px){
  .sec{padding:52px 0}
  .hero{padding-bottom:64px}
  .grid6{grid-template-columns:1fr;gap:20px}
  .g6{padding:20px 18px 18px 84px}
  .gn{font-size:38px;top:18px}
  .stage{height:466px;display:grid;place-items:center}
  .script{display:none}
  .phone{position:relative;right:auto;top:auto;width:204px;height:424px;margin:16px auto 0}
  .mtag{left:50%;top:0;margin-left:-36px;font-size:11px}
  .c1{left:0;bottom:8px;font-size:10.5px;padding:6px 10px}
  .facts{display:grid;grid-template-columns:1fr 1fr;gap:8px}
  .facts li{width:auto}
  .facts li:last-child{grid-column:1/-1}
  .frames{grid-template-columns:1fr;gap:30px}
  .frame img{height:300px}
  .frame:nth-child(1),.frame:nth-child(2){transform:none}
  .qa{grid-template-columns:1fr;gap:24px}
  .rvs{grid-template-columns:1fr}
  .scenes{padding-left:22px}
  .scenes li::before{left:-29px}
}

/* backtop 修复：JS 加 on 类 */
.backtop.on{opacity:1;pointer-events:auto}