/* 异次元 - 二次元漫画与番剧 */
:root{
  --violet:#22453B;
  --violet-2:#17332B;
  --violet-soft:#F1EBDF;
  --violet-pale:#F7F3EA;
  --lime:#B9743F;
  --ink:#1B1A18;
  --gray:#78736B;
  --line:#E2D8C7;
  --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:#78736B;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:#C98A56}

/* hero */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(108deg,#F7F3EA 0%,#F7F3EA 58%,#22453B 58%,#17332B 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:#3A3732;margin:12px 0 14px}
.desc{font-size:15px;color:#78736B;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:#F5EFE4;line-height:1.6;margin:4px 0 2px}
.strip-side p small{color:#CBBBA4;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:#DCCFBC}
.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:#78736B}

/* 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 #DCCFBC;
}
.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:#3A3732}
.gnote{
  margin-top:18px;font-size:13px;color:#3A3732;
  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:#78736B;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:#3A3732;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%,#17332B 72%,#B9743F 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:#E4D9C8;max-width:40em}
.chips{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:4px 0 8px}
.chips span{
  font-size:12px;color:#F5EFE4;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:#C98A56}

/* footer */
.ft{background:#F1EBDF;color:#78736B;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 #E2D8C7;border-bottom:1px solid #E2D8C7}
.ft-nav a:hover{color:var(--violet-2)}
.ft-c{color:#8C867C;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,#F7F3EA 0%,#FDFBF6 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}

/* THEONE - 奶油白 · 松柏绿 · 铜金 · 契约卡与马赛克六格 */
:root{
  --cream:#F7F3EA;
  --paper:#FDFBF6;
  --ink:#1B1A18;
  --forest:#22453B;
  --forest2:#17332B;
  --copper:#B9743F;
  --gray:#78736B;
  --line:#E2D8C7;
}
body{background:var(--cream);color:var(--ink)}

/* header */
.hd{background:rgba(247,243,234,.96);border-bottom:1px solid rgba(27,26,24,.16);box-shadow:none}
.hd-brand img{border-radius:4px}
.hd-brand b{letter-spacing:.14em;color:var(--ink);font-size:15px}
.hd-brand small{color:var(--gray);letter-spacing:.12em}
.nav a{color:#3A3732;font-weight:600;border-radius:2px;padding:7px 11px}
.nav a:hover{background:rgba(34,69,59,.08);color:var(--forest)}
.cta{background:var(--forest);color:#fff;border-radius:2px;box-shadow:3px 3px 0 rgba(27,26,24,.14)}
.cta:hover{background:var(--forest2);color:#fff;transform:none;box-shadow:3px 3px 0 rgba(27,26,24,.14)}

/* hero */
.hero{
  position:relative;overflow:hidden;padding:66px 0 88px;
  background:
    radial-gradient(680px 440px at 88% 10%,rgba(185,116,63,.1),transparent 66%),
    radial-gradient(560px 420px at 6% 90%,rgba(34,69,59,.07),transparent 68%),
    var(--cream);
}
.hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.kick{
  display:inline-block;font-family:"Courier New",monospace;font-size:10.5px;letter-spacing:.24em;
  color:var(--copper);border-bottom:1px solid rgba(185,116,63,.5);padding-bottom:6px;margin-bottom:18px;
}
h1{font-size:clamp(46px,6.6vw,84px);font-weight:900;letter-spacing:.035em;color:var(--ink);line-height:1;margin:0 0 14px}
h1 em{font-style:normal;color:var(--copper)}
.lead{font-size:19.5px;font-weight:700;color:#33302B;margin:0 0 14px;letter-spacing:.01em}
.desc{font-size:14.6px;color:var(--gray);line-height:1.98;max-width:34em}
.acts{margin:28px 0 26px;display:flex;align-items:center;gap:22px}
.btn{background:var(--forest);color:#fff;border-radius:2px;padding:14px 26px;box-shadow:4px 4px 0 rgba(27,26,24,.14);font-weight:700}
.btn:hover{background:var(--forest2);transform:none;box-shadow:4px 4px 0 rgba(27,26,24,.14)}
.ghost{color:var(--forest);border-bottom:1px solid rgba(34,69,59,.45);padding-bottom:2px;font-weight:700}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--ink);max-width:520px}
.facts li{border:0;background:transparent;border-left:1px solid var(--line);border-radius:0;padding:12px 14px 0;min-width:0}
.facts li:first-child{border-left:0;padding-left:0}
.facts b{display:block;font-size:14px;color:var(--ink)}
.facts span{display:block;font-size:11.5px;color:var(--gray);margin-top:3px}

/* 契约卡 */
.contract{
  position:relative;background:var(--paper);border:1px solid rgba(27,26,24,.3);max-width:430px;justify-self:end;
  padding:46px 28px 30px;transform:rotate(1.4deg);box-shadow:16px 16px 0 rgba(34,69,59,.12);
}
.contract::before{content:"";position:absolute;inset:9px;border:1px dashed rgba(185,116,63,.4);pointer-events:none}
.cbig{
  position:absolute;right:6px;bottom:-6px;font-family:"Songti SC","STSong",serif;font-size:146px;line-height:1;
  color:var(--forest);opacity:.07;pointer-events:none;
}
.ctop{font-family:"Courier New",monospace;font-size:10px;letter-spacing:.24em;color:var(--copper)}
.cname{font-family:"Songti SC","STSong",serif;font-size:26px;color:var(--ink);margin:14px 0 16px}
.clines{list-style:none;position:relative;z-index:1}
.clines li{display:flex;align-items:baseline;justify-content:space-between;gap:16px;border-top:1px dashed var(--line);padding:12px 0;font-size:13px}
.clines span{color:var(--gray)}
.clines b{font-family:"Songti SC","STSong",serif;font-size:15px;color:var(--ink);font-weight:600}
.cseal{
  position:absolute;left:-26px;top:-26px;width:58px;height:58px;border-radius:50%;background:var(--copper);
  color:var(--paper);display:grid;place-items:center;text-align:center;font-family:"Courier New",monospace;
  font-size:9.5px;letter-spacing:.14em;line-height:1.35;transform:rotate(-8deg);padding:8px;
}

/* sections */
.sec{background:var(--cream);padding:80px 0}
.scrsec{background:#F1EBDF;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sh{max-width:46em}
.eyebrow{
  display:inline-block;font-family:"Courier New",monospace;font-size:10px;letter-spacing:.26em;font-weight:800;
  color:var(--forest);background:transparent;border:1px solid rgba(34,69,59,.4);border-radius:0;padding:4px 10px;margin-bottom:13px;
}
.sh h2{font-size:clamp(26px,3.3vw,33px);color:var(--ink);letter-spacing:-.01em}
.sh h2::after{width:44px;height:3px;background:var(--copper);border-radius:0;margin-top:12px}
.sh p{font-size:13.8px;color:var(--gray);line-height:1.85}

/* features：六格马赛克 */
.fmosaic{display:grid;grid-template-columns:repeat(3,1fr);border-top:2px solid var(--ink);border-left:1px solid var(--line);margin-top:30px}
.fcell{padding:26px 22px 24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:186px}
.fcell.dark{background:var(--forest);border-color:rgba(255,255,255,.12)}
.fno{font-family:"Courier New",monospace;font-size:11px;letter-spacing:.18em;color:var(--copper)}
.fcell h4{font-family:"Songti SC","STSong",serif;font-size:18px;color:var(--ink);margin:12px 0 7px}
.fcell p{font-size:13px;color:var(--gray);line-height:1.85}
.fcell.dark h4{color:var(--paper)}
.fcell.dark p{color:rgba(253,251,246,.72)}
.fcell.dark .fno{color:#DCA377}

/* screens：接片台 */
.sheet{display:grid;grid-template-columns:.88fr 1.12fr;gap:26px;align-items:end;margin-top:32px}
.scell figure{margin:0;border:1px solid rgba(27,26,24,.28);overflow:hidden;background:#171420}
.scell img{display:block;width:100%;object-fit:cover;object-position:top center}
.scell:first-child img{height:420px}
.scell:last-child img{height:372px;object-position:center 60%}
.scap{margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}
.scap span{font-family:"Courier New",monospace;font-size:10px;letter-spacing:.18em;color:var(--copper)}
.scap b{display:block;font-family:"Songti SC","STSong",serif;font-size:18px;color:var(--ink);margin:6px 0 5px}
.scap p{font-size:13px;color:var(--gray);line-height:1.85}

/* guide：竖排索引 */
.idx{list-style:none;max-width:980px;border-top:2px solid var(--ink);margin-top:30px}
.idx li{display:grid;grid-template-columns:78px 1fr;gap:24px;align-items:baseline;padding:20px 2px;border-bottom:1px solid var(--line)}
.inum{font-family:"Songti SC","STSong",serif;font-size:26px;color:var(--copper);line-height:1}
.idx b{display:block;font-family:"Songti SC","STSong",serif;font-size:17px;color:var(--ink)}
.idx div span{display:block;font-size:13.4px;color:var(--gray);line-height:1.85;margin-top:5px}
.gnote{margin-top:26px;background:var(--paper);border-left:3px solid var(--copper);color:#4A443C;padding:14px 18px;font-size:13px}

/* faq：问答对照表 */
.ftable{border-top:2px solid var(--ink);margin-top:30px;max-width:1000px}
.frow2{display:grid;grid-template-columns:40% 1fr;gap:30px;padding:20px 2px;border-bottom:1px solid var(--line);align-items:baseline}
.frow2 h3{font-family:"Songti SC","STSong",serif;font-size:16.5px;color:var(--ink)}
.frow2 p{font-size:13.3px;color:var(--gray);line-height:1.85}

/* reviews：三联短评 */
.sec.band{background:#F1EBDF}
.strip{display:grid;grid-template-columns:repeat(3,1fr);border-top:2px solid var(--copper);margin-top:32px}
.sitem{padding:20px 22px 4px;border-left:1px solid var(--line)}
.sitem:first-child{border-left:0;padding-left:0}
.qwho{display:flex;align-items:center;gap:8px;font-size:11.5px;color:var(--gray);margin-bottom:12px}
.qwho i{width:24px;height:24px;display:grid;place-items:center;background:var(--forest);color:var(--paper);font-style:normal;font-family:"Songti SC","STSong",serif;font-size:12px}
.sitem blockquote{font-size:13.8px;color:#33302B;line-height:1.9}

/* get：松绿场 */
.get{position:relative;overflow:hidden;background:var(--forest);padding:86px 0;text-align:center}
.gwrap{position:relative;max-width:780px;margin:0 auto}
.gone{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-family:"Songti SC","STSong",serif;
  font-size:300px;line-height:1;color:transparent;-webkit-text-stroke:1px rgba(247,243,234,.09);pointer-events:none;
}
.get h2{position:relative;color:var(--paper);font-size:clamp(27px,3.6vw,38px)}
.get h2 em{font-style:normal;color:#E3A474}
.get p{position:relative;color:rgba(247,243,234,.75);font-size:14px;line-height:1.9;margin:12px auto 0;max-width:36em}
.chips{position:relative;justify-content:center;margin:22px 0 24px}
.chips span{background:transparent;border:1px solid rgba(247,243,234,.28);color:rgba(247,243,234,.85);border-radius:0;font-size:11.5px;padding:5px 11px}
.get .btn{position:relative;background:var(--copper);color:#fff;border-radius:2px;box-shadow:none}
.get .btn:hover{background:#A9653A}
.gwrap small{display:block;position:relative;margin-top:14px;font-size:11px;color:rgba(247,243,234,.5)}

/* footer */
.ft{background:var(--cream);border-top:1px solid var(--line);color:var(--gray);padding:44px 0 30px}
.ft-l{color:var(--ink);font-family:"Courier New",monospace;letter-spacing:.14em}
.ft-l img{border-radius:4px}
.ft-nav{border-color:var(--line)}
.ft-nav a{color:#33302B;font-weight:600}
.ft-c{color:#9A948A}
.backtop{background:var(--forest);color:#fff;border-radius:2px}

@media (max-width:960px){
  .hero{padding:52px 0 72px}
  .hero-in{grid-template-columns:1fr;gap:40px}
  .contract{justify-self:center;max-width:460px;width:100%}
  .fmosaic{grid-template-columns:repeat(2,1fr)}
  .sheet{grid-template-columns:1fr;gap:30px}
  .scell:first-child img{height:420px}
  .scell:last-child img{height:360px}
  .strip{grid-template-columns:1fr}
  .sitem{border-left:0;border-top:1px solid var(--line);padding:18px 0 2px}
  .sitem:first-child{border-top:0;padding-top:0}
  .get{padding:76px 0}
  .gone{font-size:240px}
  .nav{background:var(--cream)}
  .nav a{color:#3A3732}
}
@media (max-width:760px){
  .sec{padding:54px 0}
  h1{font-size:clamp(44px,13vw,62px)}
  .facts{grid-template-columns:1fr}
  .facts li{border-left:0;padding:10px 0 0}
  .contract{transform:none;box-shadow:8px 8px 0 rgba(34,69,59,.12);padding:40px 20px 24px}
  .cseal{width:52px;height:52px;font-size:8px;left:-14px;top:-14px}
  .cbig{font-size:104px}
  .fmosaic{grid-template-columns:1fr}
  .fcell{min-height:0;padding:20px 16px}
  .idx li{grid-template-columns:52px 1fr;gap:14px;padding:16px 0}
  .inum{font-size:22px}
  .frow2{grid-template-columns:1fr;gap:6px}
  .get{padding:64px 0}
  .gone{font-size:180px}
}

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