:root{
  --bg:#0B1410;
  --sub:#12241C;
  --main:#FF5A6E;
  --mid:#FF8A7A;
  --green:#3DDC97;
  --text:#F6FFF8;
  --line:rgba(61,220,151,.18);
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(11,20,16,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:64px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.5px;}
.brand img{height:32px;width:auto;border-radius:8px;}
.brand span{font-size:17px;}
.nav{display:none;gap:28px;font-size:14px;color:rgba(246,255,248,.72);}
.nav a:hover{color:var(--green);}
.top-btn{
  font-size:13px;padding:8px 18px;border-radius:999px;
  border:1px solid rgba(255,90,110,.5);
  color:var(--main);
  transition:.25s;
}
.top-btn:hover{background:rgba(255,90,110,.1);}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:52px 0 64px;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background:radial-gradient(ellipse at 78% 30%, rgba(255,90,110,.12), transparent 58%),
             radial-gradient(ellipse at 12% 82%, rgba(61,220,151,.08), transparent 55%);
  pointer-events:none;
}
.hero-inner{
  position:relative;
  display:flex;flex-direction:column;gap:42px;
}
.hero-label{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:1px;
  color:var(--green);
  border:1px solid var(--line);
  padding:5px 14px;border-radius:999px;
  width:fit-content;
  margin-bottom:18px;
}
.hero-label i{
  width:6px;height:6px;border-radius:50%;background:var(--green);display:block;
}
h1{
  font-size:clamp(30px,6vw,54px);
  line-height:1.22;
  font-weight:800;
  letter-spacing:-.5px;
}
h1 em{
  font-style:normal;
  background:linear-gradient(100deg,var(--main),var(--mid));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-desc{
  margin-top:20px;
  font-size:15px;
  color:rgba(246,255,248,.7);
  max-width:520px;
}
.hero-actions{
  display:flex;align-items:center;flex-wrap:wrap;gap:14px;
  margin-top:30px;
}
.btn-primary{
  position:relative;
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 30px;border-radius:999px;
  background:linear-gradient(100deg,var(--main),var(--mid));
  color:#1a070b;font-weight:700;font-size:15px;
  box-shadow:0 10px 30px -12px rgba(255,90,110,.6);
  transition:transform .25s;
}
.btn-primary:hover{transform:translateY(-2px);}
.btn-ghost{
  font-size:14px;color:rgba(246,255,248,.78);
  border-bottom:1px solid rgba(246,255,248,.28);
  padding-bottom:2px;
}
.hero-note{
  margin-top:22px;font-size:12.5px;color:rgba(246,255,248,.42);
  letter-spacing:.5px;
}

/* ---------- arc visual ---------- */
.arc-wrap{
  position:relative;
  width:min(100%,420px);
  margin:0 auto;
  aspect-ratio:1/1;
}
.arc-ring{
  position:absolute;inset:0;
  border-radius:50%;
  background:conic-gradient(from 200deg,
    #3DDC97 0deg,
    #a8e8c6 40deg,
    #F6FFF8 78deg,
    #FFD9D2 112deg,
    #FF8A7A 150deg,
    #FF5A6E 205deg,
    #7a2030 260deg,
    transparent 320deg);
  -webkit-mask:radial-gradient(circle, transparent 52%, #000 53%);
  mask:radial-gradient(circle, transparent 52%, #000 53%);
  transform:rotate(-18deg);
  filter:saturate(1.05);
}
.arc-disc{
  position:absolute;inset:16%;
  border-radius:50%;
  background:radial-gradient(circle at 32% 26%, #1c3a2b 0%, #12241C 45%, #0B1410 100%);
  display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,138,122,.16);
}
.play-tri{
  width:0;height:0;
  border-left:32px solid var(--main);
  border-top:20px solid transparent;
  border-bottom:20px solid transparent;
  margin-left:9px;
  filter:drop-shadow(0 0 14px rgba(255,90,110,.45));
}
.arc-grain{
  position:absolute;inset:0;border-radius:50%;
  background-image:radial-gradient(rgba(255,255,255,.22) .6px, transparent .7px);
  background-size:5px 5px;
  opacity:.28;
  -webkit-mask:radial-gradient(circle, transparent 54%, #000 55%, #000 70%, transparent 72%);
  mask:radial-gradient(circle, transparent 54%, #000 55%, #000 70%, transparent 72%);
  pointer-events:none;
}
.arc-seed{
  position:absolute;width:7px;height:11px;border-radius:50%;
  background:#12241C;border:1px solid rgba(246,255,248,.14);
  transform:rotate(24deg);
}
.seed-1{top:16%;right:22%;}
.seed-2{bottom:20%;right:16%;transform:rotate(-32deg);}
.seed-3{top:44%;right:7%;transform:rotate(70deg);}

/* ---------- section generic ---------- */
section{padding:66px 0;}
.sec-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:20px;margin-bottom:34px;flex-wrap:wrap;
}
h2{
  font-size:clamp(22px,3.6vw,30px);
  font-weight:800;letter-spacing:-.3px;
}
h2 .dot{
  display:inline-block;width:8px;height:8px;border-radius:50%;
  background:var(--green);vertical-align:middle;margin-right:10px;
}
.sec-tip{font-size:13px;color:rgba(246,255,248,.45);}

/* ---------- grid cards ---------- */
.poster-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:14px;
}
.poster{
  background:var(--sub);
  border:1px solid rgba(255,255,255,.05);
  border-radius:14px;
  overflow:hidden;
  position:relative;
}
.poster-img{
  position:relative;
  aspect-ratio:3/4;
  overflow:hidden;
  background:#0f1e17;
}
.poster-img img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .5s ease;
}
.poster:hover .poster-img img{transform:scale(1.04);}
.poster-img::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top,rgba(11,20,16,.85),transparent 55%);
  pointer-events:none;
}
.poster-meta{
  padding:12px 13px;
  display:flex;align-items:center;justify-content:space-between;gap:8px;
}
.poster-meta strong{font-size:13.5px;font-weight:600;}
.poster-tag{
  font-size:10.5px;color:var(--green);
  border:1px solid var(--line);
  padding:1px 7px;border-radius:999px;white-space:nowrap;
}

/* ---------- 横屏精选 ---------- */
.wide-sec{background:var(--sub);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.wide-list{display:grid;gap:16px;}
.wide-card{
  display:grid;grid-template-columns:1fr;
  gap:0;border-radius:18px;overflow:hidden;
  background:#0f1e17;border:1px solid rgba(255,255,255,.05);
}
.wide-card .wide-img{aspect-ratio:16/9;overflow:hidden;}
.wide-card .wide-img img{width:100%;height:100%;object-fit:cover;}
.wide-body{padding:16px 18px 20px;}
.wide-body h3{font-size:16px;margin-bottom:6px;}
.wide-body p{font-size:13px;color:rgba(246,255,248,.55);}

/* ---------- 专题合集 ---------- */
.collage{
  display:grid;gap:14px;
}
.collage-item{
  position:relative;overflow:hidden;
  background:var(--sub);
  border:1px solid rgba(255,255,255,.05);
}
.collage-item img{width:100%;height:100%;object-fit:cover;}
.collage-1{border-radius:80px 18px 18px 18px;aspect-ratio:16/10;}
.collage-2{border-radius:18px;aspect-ratio:4/3;transform:rotate(-1.6deg);}
.collage-3{border-radius:18px 18px 80px 18px;aspect-ratio:4/3;}
.collage-4{border-radius:50% 50% 18px 18px / 40% 40% 18px 18px;aspect-ratio:1/1;}
.collage-cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:22px 16px 14px;
  background:linear-gradient(to top,rgba(11,20,16,.92),transparent);
  font-size:13.5px;font-weight:600;
}

/* ---------- 亮点玩法 ---------- */
.feature-grid{
  display:grid;gap:16px;
}
.feature{
  background:var(--sub);
  border:1px solid rgba(255,255,255,.05);
  padding:24px 22px;
  border-radius:16px;
}
.feature:nth-child(1){border-radius:44px 16px 16px 16px;}
.feature:nth-child(2){border-radius:16px;}
.feature:nth-child(3){border-radius:16px 44px 16px 16px;}
.feature:nth-child(4){border-radius:16px 16px 16px 44px;}
.feature-no{
  font-size:12px;letter-spacing:2px;color:var(--green);
  margin-bottom:12px;display:block;
}
.feature h3{font-size:16.5px;margin-bottom:9px;}
.feature p{font-size:13.5px;color:rgba(246,255,248,.58);}

/* ---------- 评价 ---------- */
.review-sec{background:var(--sub);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.review-list{display:grid;gap:14px;}
.review{
  padding:20px;border-radius:14px;
  background:#0B1410;border:1px solid rgba(255,255,255,.05);
}
.review p{font-size:13.5px;color:rgba(246,255,248,.72);margin-bottom:12px;}
.review span{font-size:12px;color:rgba(246,255,248,.36);}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;}
.faq-item{
  background:var(--sub);border:1px solid rgba(255,255,255,.05);
  border-radius:12px;padding:18px 20px;
}
.faq-item h3{
  font-size:14.5px;margin-bottom:8px;color:var(--text);
  display:flex;gap:9px;align-items:flex-start;
}
.faq-item h3::before{
  content:"";width:5px;height:5px;border-radius:50%;
  background:var(--green);margin-top:9px;flex:0 0 auto;
}
.faq-item p{font-size:13.5px;color:rgba(246,255,248,.56);}

/* ---------- download ---------- */
.download-sec{
  text-align:center;
  position:relative;
  overflow:hidden;
}
.download-box{
  background:linear-gradient(160deg,#12241C, #0B1410 74%);
  border:1px solid var(--line);
  border-radius:32px;
  padding:52px 24px;
}
.download-box h2{margin-bottom:14px;}
.download-box p{
  font-size:14px;color:rgba(246,255,248,.6);
  max-width:480px;margin:0 auto 28px;
}
.download-box .btn-primary{font-size:15.5px;padding:15px 36px;}
.download-foot{
  margin-top:18px;font-size:12px;color:rgba(246,255,248,.36);
}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  padding:32px 0 40px;
  font-size:12px;
  color:rgba(246,255,248,.38);
}
.footer-inner{display:grid;gap:10px;text-align:center;}
.footer-inner a:hover{color:var(--green);}
.footer-time{color:rgba(246,255,248,.3);}

/* ---------- breakpoints ---------- */
@media(min-width:768px){
  .nav{display:flex;}
  .hero-inner{
    flex-direction:row;align-items:center;justify-content:space-between;
    gap:40px;
  }
  .hero-copy{flex:1 1 56%;}
  .arc-wrap{flex:0 0 38%;width:38%;}
  .poster-grid{grid-template-columns:repeat(3,1fr);gap:18px;}
  .wide-list{grid-template-columns:repeat(2,1fr);}
  .collage{grid-template-columns:repeat(2,1fr);}
  .collage-1{grid-column:span 2;aspect-ratio:21/9;}
  .feature-grid{grid-template-columns:repeat(2,1fr);}
  .review-list{grid-template-columns:repeat(2,1fr);}
  .footer-inner{grid-template-columns:1fr;text-align:center;}
}
@media(min-width:1024px){
  .poster-grid{grid-template-columns:repeat(4,1fr);}
  .wide-list{grid-template-columns:repeat(2,1fr);gap:22px;}
  .wide-card{grid-template-columns:1.25fr 1fr;align-items:center;}
  .wide-card .wide-img{aspect-ratio:16/9;height:100%;}
  .collage{grid-template-columns:repeat(4,1fr);align-items:end;}
  .collage-1{grid-column:span 2;aspect-ratio:16/9;}
  .collage-2{aspect-ratio:3/4;}
  .collage-3{aspect-ratio:3/4;}
  .collage-4{aspect-ratio:1/1;}
  .feature-grid{grid-template-columns:repeat(4,1fr);}
  .review-list{grid-template-columns:repeat(3,1fr);}
  .download-box{padding:70px 60px;}
}