*{margin:0;padding:0;box-sizing:border-box;}
:root{
  --bg:#0b0d10;
  --bg-2:#12151a;
  --bg-3:#181c22;
  --line:#242a32;
  --text:#eef1f4;
  --muted:#8e98a4;
  --green:#3ecf8e;
  --pink:#ff5f7e;
  --red:#e8334b;
  --white:#f5f7f8;
}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 18px;}

/* ===== header ===== */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(11,13,16,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:60px;
}
.brand{display:flex;align-items:center;gap:10px;}
.brand img{height:32px;width:32px;border-radius:8px;object-fit:cover;}
.brand span{font-size:17px;font-weight:700;letter-spacing:.5px;}
.nav-links{display:none;gap:26px;font-size:14px;color:var(--muted);}
.nav-links a:hover{color:var(--text);}
.header-cta{
  font-size:13px;padding:8px 16px;border-radius:999px;
  background:linear-gradient(120deg,var(--green),var(--pink));
  color:#0b0d10;font-weight:700;white-space:nowrap;
}

/* ===== 首屏 ===== */
.hero{
  position:relative;
  padding:56px 0 64px;
  overflow:hidden;
  background:
    radial-gradient(700px 380px at 78% 12%, rgba(232,51,75,.18), transparent 70%),
    radial-gradient(600px 340px at 12% 80%, rgba(62,207,142,.14), transparent 70%),
    var(--bg);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.045) 1px, transparent 1px);
  background-size:4px 4px;opacity:.6;
}
.hero-inner{position:relative;z-index:2;display:grid;gap:40px;align-items:center;}
.hero-copy h1{
  font-size:30px;line-height:1.32;font-weight:800;letter-spacing:.5px;
  margin-bottom:16px;
}
.hero-copy h1 em{
  font-style:normal;
  background:linear-gradient(100deg,var(--green),#bfffe0 40%,#ffc4cf 70%,var(--red));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-copy p{color:var(--muted);font-size:15px;max-width:520px;margin-bottom:10px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;}
.btn-primary{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 26px;border-radius:999px;
  background:linear-gradient(115deg,var(--green),var(--pink));
  color:#08100c;font-weight:800;font-size:15px;
  box-shadow:0 10px 30px -12px rgba(62,207,142,.6);
  transition:transform .2s ease;
}
.btn-primary:hover{transform:translateY(-2px);}
.btn-ghost{
  display:inline-flex;align-items:center;
  padding:13px 24px;border-radius:999px;
  border:1px solid var(--line);color:var(--text);font-size:14px;
  background:rgba(255,255,255,.02);
}
.hero-meta{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px;}
.pill{
  font-size:12px;color:var(--muted);
  border:1px solid var(--line);border-radius:999px;
  padding:5px 12px;background:rgba(255,255,255,.02);
}

/* 首屏主视觉：抽象切瓜弧带 */
.hero-art{position:relative;display:flex;justify-content:center;align-items:center;min-height:300px;}
.arc-stage{
  position:relative;width:280px;height:280px;
  display:flex;align-items:center;justify-content:center;
}
.arc-ring{
  position:absolute;inset:0;border-radius:50%;
  background:conic-gradient(from 200deg,#3ecf8e,#d7fff0,#ffffff,#ffc2cd,#e8334b,#ff7a92,#3ecf8e);
  -webkit-mask:radial-gradient(circle, transparent 54%, #000 55%);
  mask:radial-gradient(circle, transparent 54%, #000 55%);
  filter:blur(.3px);
  animation:arcSpin 24s linear infinite;
}
@keyframes arcSpin{to{transform:rotate(360deg);}}
.arc-ring-inner{
  position:absolute;inset:26px;border-radius:50%;
  background:radial-gradient(circle at 35% 25%, rgba(255,255,255,.16), transparent 60%),var(--bg-2);
  border:1px solid var(--line);
  box-shadow:inset 0 0 40px rgba(232,51,75,.14);
}
.play-core{
  position:relative;z-index:3;
  width:86px;height:86px;border-radius:24px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--green),var(--pink));
  box-shadow:0 18px 44px -14px rgba(255,95,126,.7);
  transform:rotate(-6deg);
}
.play-core::before{
  content:"";width:0;height:0;
  border-left:22px solid #0b0d10;
  border-top:14px solid transparent;
  border-bottom:14px solid transparent;
  margin-left:6px;
}
.hero-art-caption{
  position:absolute;bottom:0;right:0;
  font-size:11px;color:var(--muted);letter-spacing:1px;
}

/* ===== 通用区块 ===== */
section{padding:64px 0;}
.section-head{margin-bottom:30px;}
.section-head h2{font-size:23px;font-weight:800;letter-spacing:.4px;}
.section-head p{color:var(--muted);font-size:14px;margin-top:6px;max-width:560px;}
.hairline{height:1px;background:var(--line);margin-bottom:34px;}

/* ===== 网格海报 ===== */
.poster-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:14px;
}
.poster-card{
  position:relative;border-radius:10px;overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-3);
  aspect-ratio:3/4;
}
.poster-card img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.poster-card:hover img{transform:scale(1.05);}
.poster-card .tag{
  position:absolute;left:8px;top:8px;
  font-size:11px;padding:3px 8px;border-radius:6px;
  background:rgba(11,13,16,.75);color:var(--white);
  border:1px solid rgba(255,255,255,.14);
}
.poster-card .cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:26px 10px 10px;
  background:linear-gradient(to top,rgba(6,8,10,.92),transparent);
  font-size:13px;font-weight:700;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}

/* ===== 横屏精选 ===== */
.landscape-row{
  display:grid;gap:16px;
}
.landscape-card{
  position:relative;border-radius:16px 4px 16px 4px;
  overflow:hidden;border:1px solid var(--line);
  background:var(--bg-3);
}
.landscape-card img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/9;}
.landscape-card .info{
  padding:14px 16px 16px;
}
.landscape-card h3{font-size:15px;margin-bottom:4px;}
.landscape-card p{font-size:13px;color:var(--muted);}

/* ===== 专题合集 ===== */
.topic-grid{display:grid;gap:18px;}
.topic-card{
  position:relative;
  padding:26px 22px;
  border-radius:26px 8px 26px 8px;
  border:1px solid var(--line);
  background:linear-gradient(150deg,var(--bg-2),var(--bg));
  overflow:hidden;
  transition:transform .3s ease,border-color .3s ease;
}
.topic-card:hover{transform:translateY(-4px);border-color:#39424e;}
.topic-card::before{
  content:"";position:absolute;right:-30px;top:-30px;
  width:120px;height:120px;border-radius:50%;
  background:radial-gradient(circle,rgba(232,51,75,.28),transparent 70%);
}
.topic-card img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:14px 4px 14px 4px;margin-bottom:16px;
}
.topic-card h3{font-size:17px;margin-bottom:8px;}
.topic-card p{font-size:13px;color:var(--muted);}

/* ===== 亮点玩法 ===== */
.feature-list{display:grid;gap:16px;}
.feature-item{
  display:flex;gap:14px;align-items:flex-start;
  padding:20px;border-radius:6px 22px 6px 22px;
  border:1px solid var(--line);
  background:var(--bg-2);
}
.feature-num{
  flex:none;width:36px;height:36px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:800;color:#08100c;
  background:linear-gradient(135deg,var(--green),var(--pink));
}
.feature-item h3{font-size:15px;margin-bottom:5px;}
.feature-item p{font-size:13px;color:var(--muted);line-height:1.75;}

/* ===== 用户评价 ===== */
.review-row{display:grid;gap:14px;}
.review{
  padding:20px;border-radius:16px;border:1px solid var(--line);
  background:var(--bg-2);
}
.review p{font-size:14px;color:#cbd3dc;margin-bottom:12px;}
.review .who{font-size:12px;color:var(--muted);}

/* ===== FAQ ===== */
.faq-list{display:grid;gap:10px;}
.faq-list details{
  border:1px solid var(--line);border-radius:12px;
  background:var(--bg-2);padding:14px 16px;
}
.faq-list summary{
  cursor:pointer;font-size:14px;font-weight:700;list-style:none;
}
.faq-list summary::-webkit-details-marker{display:none;}
.faq-list summary::after{content:"＋";float:right;color:var(--muted);font-weight:400;}
.faq-list details[open] summary::after{content:"－";}
.faq-list details p{font-size:13px;color:var(--muted);margin-top:10px;}

/* ===== 下载 ===== */
.download{
  text-align:center;
  background:
    radial-gradient(560px 320px at 50% 0%, rgba(255,95,126,.16), transparent 70%),
    var(--bg-2);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.download h2{font-size:24px;margin-bottom:10px;}
.download p{color:var(--muted);font-size:14px;max-width:480px;margin:0 auto 24px;}
.download .btn-primary{font-size:16px;padding:15px 34px;}

/* ===== footer ===== */
.site-footer{
  padding:34px 0 40px;
  font-size:12px;color:#5f6873;text-align:center;
}
.site-footer p{margin-bottom:6px;}
.site-footer a{color:#6d7681;}
.site-footer a:hover{color:#98a2ad;}
.site-footer time{color:#5f6873;}

/* ===== 响应式 ===== */
@media (min-width:768px){
  .poster-grid{grid-template-columns:repeat(3,1fr);}
  .topic-grid{grid-template-columns:repeat(2,1fr);}
  .feature-list{grid-template-columns:repeat(2,1fr);}
  .review-row{grid-template-columns:repeat(2,1fr);}
  .landscape-row{grid-template-columns:repeat(2,1fr);}
  .hero-copy h1{font-size:38px;}
  .arc-stage{width:360px;height:360px;}
  .header-inner{height:68px;}
  .brand img{height:36px;width:36px;}
  .nav-links{display:flex;}
}
@media (min-width:1024px){
  section{padding:80px 0;}
  .hero{padding:80px 0 90px;}
  .hero-inner{grid-template-columns:1.1fr .9fr;gap:60px;}
  .hero-copy h1{font-size:44px;}
  .poster-grid{grid-template-columns:repeat(4,1fr);gap:18px;}
  .topic-grid{grid-template-columns:repeat(3,1fr);}
  .review-row{grid-template-columns:repeat(3,1fr);}
  .landscape-row{grid-template-columns:repeat(3,1fr);}
  .arc-stage{width:420px;height:420px;}
  .section-head h2{font-size:27px;}
}