/* ===== 汽水音乐 - 潮流音乐平台·暗黑霓虹风 ===== */
:root {
  --bg: #0a0818;
  --bg2: #110e26;
  --bg3: #191438;
  --card: #120f2a;
  --card-hover: #1a1640;
  --border: #251e4a;
  --border-light: #362b60;
  --text: #f2efff;
  --text2: #b8b2d8;
  --text3: #6b6498;
  --orange: #ff6238;
  --orange-light: #ff845c;
  --pink: #ec4899;
  --pink-light: #f472b6;
  --purple: #8b5cf6;
  --grad: linear-gradient(135deg, #ff6238, #ec4899, #8b5cf6);
  --grad-soft: linear-gradient(135deg, rgba(255,98,56,0.10), rgba(236,72,153,0.10));
  --radius: 20px;
  --radius-sm: 12px;
  --shadow: 0 8px 32px rgba(0,0,0,0.45);
  --shadow-lg: 0 24px 64px rgba(0,0,0,0.6);
  --trans: 0.3s cubic-bezier(0.4,0,0.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.65;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

/* Nav */
.nav-bar{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(10,8,24,0.88);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);
  border-bottom:1px solid rgba(37,30,74,0.4);
}
.nav-inner{
  max-width:1240px;margin:0 auto;padding:0 32px;height:64px;
  display:flex;align-items:center;justify-content:space-between;
}
.nav-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;letter-spacing:-0.2px}
.nav-brand .brand-dot{width:34px;height:34px;border-radius:50%;background:var(--grad);display:grid;place-items:center;font-size:16px;color:#fff}
.nav-brand .accent{color:var(--orange)}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{padding:9px 18px;border-radius:8px;font-size:14px;font-weight:500;color:var(--text2);transition:all var(--trans)}
.nav-menu a:hover{color:#fff;background:rgba(255,98,56,0.06)}
.nav-menu a.btn-nav{
  background:var(--grad);color:#fff;font-weight:600;
  border-radius:99px;padding:10px 24px;box-shadow:0 4px 20px rgba(255,98,56,0.22)
}
.nav-menu a.btn-nav:hover{transform:translateY(-1px);box-shadow:0 8px 28px rgba(255,98,56,0.35)}
.nav-toggle{display:none;background:none;border:none;color:var(--text);font-size:24px;cursor:pointer}

/* Hero */
.hero{
  padding:148px 0 80px;position:relative;overflow:hidden;
  background:
    radial-gradient(ellipse 70% 60% at 50% 0%,rgba(255,98,56,0.07) 0%,rgba(236,72,153,0.03) 35%,transparent 65%);
}
.hero::before{content:"";position:absolute;bottom:-80px;right:-120px;width:450px;height:450px;background:radial-gradient(circle,rgba(236,72,153,0.05) 0%,transparent 70%);pointer-events:none;border-radius:50%}
.hero::after{content:"";position:absolute;top:20%;left:-60px;width:300px;height:300px;background:radial-gradient(circle,rgba(139,92,246,0.04) 0%,transparent 70%);pointer-events:none;border-radius:50%}
.hero-grid{
  max-width:1240px;margin:0 auto;padding:0 32px;
  display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center;
  position:relative;z-index:1
}
.hero-text .tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 16px;border-radius:99px;
  background:rgba(255,98,56,0.08);border:1px solid rgba(255,98,56,0.12);
  color:var(--orange-light);font-size:12px;font-weight:600;margin-bottom:26px
}
.tag .dot{width:6px;height:6px;border-radius:50%;background:var(--orange);animation:pulse-dot 2s infinite}
@keyframes pulse-dot{0%,100%{opacity:1;box-shadow:0 0 6px var(--orange)}50%{opacity:0.3;box-shadow:0 0 14px var(--orange)}}
.hero-text h1{font-size:clamp(36px,5vw,56px);font-weight:900;line-height:1.04;letter-spacing:-1.5px;margin-bottom:20px}
.hero-text h1 .hl{background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-text .desc{font-size:16px;color:var(--text3);line-height:1.8;margin-bottom:34px;max-width:460px}
.hero-btns{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.hero-btns .tip{font-size:12px;color:var(--text3)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:99px;font-size:14px;font-weight:600;cursor:pointer;transition:all var(--trans);border:none;white-space:nowrap}
.btn-fill{background:var(--grad);color:#fff;box-shadow:0 6px 24px rgba(255,98,56,0.28)}
.btn-fill:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(255,98,56,0.4)}
.btn-line{background:transparent;color:var(--text);border:1px solid var(--border-light)}
.btn-line:hover{border-color:var(--orange);color:var(--orange-light)}
.btn-muted{background:rgba(255,255,255,0.03);color:var(--text);border:1px solid var(--border);border-radius:99px}
.btn-muted:hover{background:rgba(255,255,255,0.06)}

/* Player visual */
.player-visual{position:relative}
.player-box{
  background:var(--card);border:1px solid var(--border);
  border-radius:24px;overflow:hidden;
  box-shadow:0 0 0 1px rgba(255,98,56,0.06),var(--shadow-lg)
}
.player-box .pb-cover{
  height:200px;background:linear-gradient(135deg,rgba(255,98,56,0.15),rgba(236,72,153,0.1),rgba(139,92,246,0.08));
  display:grid;place-items:center;position:relative
}
.pb-cover .pb-disc{width:100px;height:100px;border-radius:50%;background:var(--grad);display:grid;place-items:center;font-size:36px;animation:spin 8s linear infinite;box-shadow:0 0 40px rgba(255,98,56,0.3)}
@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}
.player-box .pb-info{padding:18px 20px}
.pb-info .pb-title{font-size:16px;font-weight:700;margin-bottom:4px}
.pb-info .pb-artist{font-size:13px;color:var(--text3)}
.pb-info .pb-bar{margin-top:14px;height:4px;background:var(--border);border-radius:2px;position:relative}
.pb-bar::after{content:"";position:absolute;top:0;left:0;width:45%;height:100%;background:var(--grad);border-radius:2px}
.player-badge{
  position:absolute;bottom:-16px;left:-20px;
  background:var(--card);border:1px solid var(--border);
  border-radius:14px;padding:14px 20px;box-shadow:var(--shadow);
  display:flex;align-items:center;gap:12px
}
.player-badge .ic{width:38px;height:38px;border-radius:50%;background:var(--grad);display:grid;place-items:center;font-size:16px}
.player-badge strong{display:block;font-size:13px}
.player-badge span{font-size:11px;color:var(--orange-light)}

/* Platform strip */
.plt-strip{
  max-width:1240px;margin:0 auto;padding:0 32px 72px;position:relative;z-index:1
}
.plt-inner{
  background:var(--grad-soft);border:1px solid var(--border);
  border-radius:var(--radius);padding:28px 40px;
  display:flex;align-items:center;justify-content:center;gap:48px;flex-wrap:wrap
}
.plt-inner .pi{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text2);font-weight:500}
.pi .pii{font-size:20px}

/* Sections */
.sec{max-width:1240px;margin:0 auto;padding:80px 32px}
.sec-head{text-align:center;margin-bottom:56px}
.sec-head .label{
  display:inline-block;padding:5px 16px;border-radius:99px;
  background:rgba(255,98,56,0.06);border:1px solid rgba(255,98,56,0.1);
  color:var(--orange-light);font-size:11px;font-weight:700;letter-spacing:1px;margin-bottom:16px
}
.sec-head h2{font-size:clamp(28px,4vw,40px);font-weight:800;letter-spacing:-0.5px;margin-bottom:12px}
.sec-head p{color:var(--text3);font-size:15px;max-width:520px;margin:0 auto}

/* Feature cards */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feat-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:30px 22px;text-align:center;
  transition:all var(--trans);position:relative;overflow:hidden
}
.feat-card::after{
  content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);
  width:0;height:3px;background:var(--grad);border-radius:3px;
  transition:width var(--trans)
}
.feat-card:hover::after{width:60%}
.feat-card:hover{border-color:var(--border-light);transform:translateY(-3px);box-shadow:var(--shadow)}
.feat-card .fc-icon{
  width:52px;height:52px;border-radius:50%;
  background:var(--grad-soft);display:grid;place-items:center;
  font-size:22px;margin:0 auto 16px
}
.feat-card h3{font-size:16px;font-weight:700;margin-bottom:8px}
.feat-card p{font-size:12px;color:var(--text3);line-height:1.7}

/* Playlist dark zone */
.dark-zone{
  background:linear-gradient(180deg,rgba(17,14,38,0.5),var(--bg2),rgba(17,14,38,0.5));
  border-top:1px solid var(--border);border-bottom:1px solid var(--border)
}
.pl-row{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.pl-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:36px 28px;text-align:center;
  transition:all var(--trans)
}
.pl-card:hover{border-color:var(--border-light);transform:translateY(-3px);box-shadow:var(--shadow)}
.pl-card .pli{font-size:38px;margin-bottom:12px}
.pl-card h3{font-size:17px;font-weight:700;margin-bottom:6px}
.pl-card p{font-size:12px;color:var(--text3)}
.pl-card .pl-song{display:flex;flex-direction:column;gap:5px;margin-top:16px;text-align:left;padding:0 10px}
.pl-song .s{font-size:11px;color:var(--text3);padding:6px 10px;background:rgba(255,255,255,0.02);border-radius:6px;border-left:2px solid var(--border)}

/* Stats */
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:28px 20px;text-align:center
}
.stat-card .sn{font-size:36px;font-weight:900;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-card .sl{font-size:12px;color:var(--text2);margin-top:6px}
.stat-card .ss{font-size:11px;color:var(--text3);margin-top:2px}

/* FAQ */
.faq-wrap{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden}
.faq-q{
  width:100%;padding:20px 24px;background:none;border:none;
  color:var(--text);font-size:15px;font-weight:600;text-align:left;
  cursor:pointer;display:flex;justify-content:space-between;align-items:center;
  font-family:inherit
}
.faq-q .arrow{font-size:11px;color:var(--orange-light);transition:transform var(--trans)}
.faq-a{padding:0 24px 20px;font-size:13px;color:var(--text3);line-height:1.8;display:none}
.faq-item.open .faq-a{display:block}
.faq-item.open .arrow{transform:rotate(180deg)}

/* CTA */
.cta-box{
  background:var(--grad-soft);border:1px solid var(--border);
  border-radius:var(--radius);padding:60px 48px;text-align:center
}
.cta-box h2{font-size:clamp(28px,4vw,36px);font-weight:800;margin-bottom:12px}
.cta-box p{color:var(--text3);font-size:15px;margin-bottom:28px}
.cta-box .cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* Footer */
.footer{background:var(--bg2);border-top:1px solid var(--border)}
.footer-grid{
  max-width:1240px;margin:0 auto;padding:56px 32px 28px;
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px
}
.footer-brand .fl{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:800;margin-bottom:12px}
.footer-brand .fl img{width:28px;height:28px;border-radius:50%}
.footer-brand .fl .fc{color:var(--orange-light)}
.footer-brand p{font-size:13px;color:var(--text3);line-height:1.7;max-width:250px}
.footer-col h4{font-size:14px;font-weight:700;margin-bottom:16px}
.footer-col a{display:block;font-size:13px;color:var(--text3);padding:5px 0;transition:color var(--trans)}
.footer-col a:hover{color:var(--orange-light)}
.footer-bottom{
  max-width:1240px;margin:0 auto;padding:18px 32px;
  border-top:1px solid var(--border);
  display:flex;justify-content:space-between;font-size:12px;color:var(--text3);
  flex-wrap:wrap;gap:12px
}

/* Download */
.dl-hero{padding:130px 0 56px;text-align:center;background:radial-gradient(ellipse 50% 40% at 50% 30%,rgba(255,98,56,0.05) 0%,transparent 60%)}
.dl-hero-inner{max-width:760px;margin:0 auto;padding:0 32px}
.dl-hero-inner h1{font-size:clamp(30px,5vw,44px);font-weight:900;margin-bottom:12px}
.dl-hero-inner .dl-sub{color:var(--text3);font-size:14px;margin-bottom:18px}
.dl-meta{display:inline-flex;gap:20px;font-size:12px;color:var(--text2);flex-wrap:wrap}
.dl-grid{max-width:1240px;margin:0 auto 56px;padding:0 32px;display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.dl-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:34px 26px;text-align:center;
  transition:all var(--trans);display:flex;flex-direction:column;gap:14px
}
.dl-card:hover{border-color:var(--border-light);transform:translateY(-2px);box-shadow:var(--shadow)}
.dl-card .dl-tag{display:inline-block;padding:4px 14px;border-radius:99px;font-size:11px;font-weight:700;background:rgba(255,98,56,0.08);color:var(--orange-light);align-self:center}
.dl-card h3{font-size:18px;font-weight:700}
.dl-card .dl-info{font-size:12px;color:var(--text3);line-height:1.6}
.dl-card .dl-size{font-size:11px;color:var(--text3)}
.dl-tips{max-width:1240px;margin:0 auto 56px;padding:0 32px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.dl-tips .tp{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:22px 18px;display:flex;gap:14px;align-items:flex-start}
.tp .tp-num{width:30px;height:30px;border-radius:50%;background:var(--grad-soft);color:var(--orange-light);display:grid;place-items:center;font-size:13px;font-weight:800;flex-shrink:0}
.tp strong{display:block;font-size:13px;margin-bottom:4px}
.tp p{font-size:11px;color:var(--text3);line-height:1.6}

.specs-tbl{max-width:760px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.specs-tbl .sr{display:grid;grid-template-columns:150px 1fr;border-bottom:1px solid var(--border)}
.specs-tbl .sr:last-child{border-bottom:none}
.specs-tbl .sl{padding:14px 18px;background:var(--bg3);font-size:12px;font-weight:700;color:var(--orange-light)}
.specs-tbl .sv{padding:14px 18px;font-size:12px;color:var(--text2)}

/* 404 */
.err-wrap{min-height:100vh;display:grid;place-items:center;padding:32px;background:var(--bg)}
.err-card{
  max-width:480px;text-align:center;
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:60px 48px;box-shadow:var(--shadow-lg)
}
.err-card .err-num{font-size:clamp(90px,16vw,140px);font-weight:900;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:0.9;margin-bottom:8px}
.err-card h1{font-size:20px;font-weight:700;margin-bottom:12px}
.err-card p{color:var(--text3);font-size:13px;line-height:1.7;margin-bottom:28px}
.err-card .err-btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .pl-row{grid-template-columns:1fr;max-width:420px;margin:0 auto}
  .dl-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav-menu{display:none}
  .nav-toggle{display:block}
  .nav-menu.open{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:var(--bg2);border-bottom:1px solid var(--border);padding:12px 24px;gap:4px;z-index:99}
  .hero{padding:120px 0 50px}
  .feat-grid{grid-template-columns:1fr}
  .stats-row{grid-template-columns:repeat(2,1fr)}
  .dl-grid,.dl-tips{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .sec{padding:52px 20px}
  .cta-box{padding:44px 24px}
}