:root{
  --bg:#0f0c1a;
  --bg-soft:#171227;
  --card:#1e1833;
  --line:rgba(255,255,255,.09);
  --text:#f2eefb;
  --text-dim:#a99fc4;
  --pink:#ff5c8a;
  --purple:#8b6cff;
  --cyan:#42e2e0;
}
*{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",sans-serif;
  line-height:1.7;
  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 20px;}

/* header */
.site-head{
  position:sticky;top:0;z-index:50;
  background:rgba(15,12,26,.85);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.head-inner{
  display:flex;align-items:center;gap:18px;
  height:64px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand img{height:34px;width:auto;border-radius:8px;}
.brand-name{font-size:19px;font-weight:700;letter-spacing:.5px;}
.nav{display:flex;gap:8px;margin-left:auto;overflow-x:auto;scrollbar-width:none;}
.nav::-webkit-scrollbar{display:none;}
.nav a{
  font-size:14px;color:var(--text-dim);
  padding:7px 12px;border-radius:20px;white-space:nowrap;
  transition:color .2s,background .2s;
}
.nav a:hover{color:#fff;background:rgba(255,255,255,.07);}
.head-cta{
  flex-shrink:0;font-size:14px;font-weight:600;
  padding:8px 18px;border-radius:20px;
  background:linear-gradient(100deg,var(--pink),var(--purple));
  color:#fff;
}

/* hero */
.hero{
  position:relative;padding:64px 0 40px;
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;top:-180px;left:50%;transform:translateX(-50%);
  width:820px;height:520px;
  background:radial-gradient(circle,rgba(139,108,255,.32),transparent 65%);
  pointer-events:none;
}
.hero-grid{
  display:grid;grid-template-columns:1fr;gap:36px;
  align-items:center;position:relative;
}
.hero-text h1{
  font-size:30px;line-height:1.35;font-weight:800;
  letter-spacing:.5px;
}
.hero-text h1 em{
  font-style:normal;
  background:linear-gradient(100deg,var(--pink),var(--cyan));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{margin-top:16px;color:var(--text-dim);font-size:15px;max-width:520px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px;}
.hero-tags span{
  font-size:12.5px;color:#d9d0f4;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  padding:5px 12px;border-radius:14px;
}
.dl-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 26px;border-radius:14px;
  font-size:15px;font-weight:700;
  transition:transform .2s,box-shadow .2s;
}
.btn:hover{transform:translateY(-2px);}
.btn-android{
  background:linear-gradient(100deg,#ff5c8a,#ff8a5c);
  color:#fff;box-shadow:0 8px 24px rgba(255,92,138,.28);
}
.btn-ios{
  background:rgba(255,255,255,.08);
  border:1px solid var(--line);
  color:#fff;
}
.btn-ios:hover{background:rgba(255,255,255,.14);}
.hero-note{margin-top:14px;font-size:12.5px;color:var(--text-dim);}

/* tilted curve cards */
.curve-stage{
  position:relative;height:330px;margin-top:8px;
}
.curve-card{
  position:absolute;
  width:150px;
  border-radius:14px;
  overflow:hidden;
  box-shadow:0 18px 40px rgba(0,0,0,.55);
  border:1px solid rgba(255,255,255,.12);
  transition:transform .45s ease;
}
.curve-card img{width:100%;height:210px;object-fit:cover;}
.curve-card span{
  display:block;text-align:center;font-size:12px;
  padding:7px 4px;background:rgba(20,16,36,.95);
  color:#e4dcf8;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.cc1{left:0;top:96px;transform:rotate(-12deg);}
.cc2{left:112px;top:44px;transform:rotate(-6deg);}
.cc3{left:226px;top:14px;transform:rotate(0deg);z-index:3;}
.cc4{left:340px;top:44px;transform:rotate(6deg);}
.cc5{left:452px;top:96px;transform:rotate(12deg);}
.curve-card:hover{transform:translateY(-10px) rotate(0deg);z-index:9;}

/* sections */
section{padding:56px 0;}
.sec-head{margin-bottom:30px;}
.sec-head h2{
  font-size:23px;font-weight:800;letter-spacing:.4px;
}
.sec-head p{margin-top:8px;color:var(--text-dim);font-size:14px;max-width:640px;}
.sec-kicker{
  display:inline-block;font-size:12px;letter-spacing:2px;
  color:var(--cyan);margin-bottom:10px;
}

/* today update */
.update-list{display:grid;grid-template-columns:1fr;gap:16px;}
.update-item{
  display:flex;gap:14px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:16px;padding:12px;
}
.update-item img{
  width:88px;height:118px;object-fit:cover;border-radius:10px;flex-shrink:0;
}
.update-body h3{font-size:15.5px;margin-bottom:6px;}
.update-body p{font-size:13px;color:var(--text-dim);}
.badge{
  display:inline-block;font-size:11px;
  padding:2px 9px;border-radius:10px;margin-top:9px;
  background:rgba(255,92,138,.16);color:#ffa3bc;
}

/* ranking */
.rank-grid{display:grid;grid-template-columns:1fr;gap:14px;}
.rank-card{
  display:flex;align-items:center;gap:14px;
  background:linear-gradient(120deg,rgba(139,108,255,.13),rgba(30,24,51,.9));
  border:1px solid var(--line);border-radius:16px;padding:12px 16px;
}
.rank-num{
  font-size:22px;font-weight:800;font-style:italic;
  color:var(--purple);min-width:34px;
}
.rank-card:nth-child(1) .rank-num{color:#ffd166;}
.rank-card:nth-child(2) .rank-num{color:#cfd8ff;}
.rank-card:nth-child(3) .rank-num{color:#ffa07a;}
.rank-poster{
  width:56px;height:76px;object-fit:cover;border-radius:8px;flex-shrink:0;
}
.rank-info h3{font-size:15px;}
.rank-info p{font-size:12.5px;color:var(--text-dim);margin-top:2px;}

/* calendar */
.calendar-row{
  display:grid;grid-template-columns:repeat(2,1fr);gap:12px;
}
.cal-card{
  background:var(--bg-soft);
  border:1px solid var(--line);
  border-radius:14px;padding:14px;
}
.cal-card strong{
  display:block;font-size:13px;color:var(--cyan);margin-bottom:6px;
}
.cal-card span{font-size:13.5px;color:#e6dff8;}

/* poster wall */
.wall{
  display:grid;grid-template-columns:repeat(2,1fr);gap:12px;
}
.wall figure{
  border-radius:14px;overflow:hidden;
  border:1px solid var(--line);
  background:var(--card);
}
.wall img{width:100%;height:100%;aspect-ratio:3/4;object-fit:cover;}
.wall figcaption{
  font-size:12.5px;padding:8px 10px;color:#d6cdee;
}

/* flow */
.flow-grid{display:grid;grid-template-columns:1fr;gap:16px;}
.flow-step{
  position:relative;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:16px;padding:20px;
}
.flow-step .num{
  font-size:13px;font-weight:800;color:#0f0c1a;
  background:var(--cyan);border-radius:8px;
  display:inline-block;padding:2px 10px;margin-bottom:10px;
}
.flow-step h3{font-size:16px;margin-bottom:6px;}
.flow-step p{font-size:13.5px;color:var(--text-dim);}

/* tutorial */
.tut-list{display:grid;grid-template-columns:1fr;gap:16px;}
.tut-item{
  background:var(--bg-soft);
  border-left:3px solid var(--pink);
  border-radius:10px;padding:16px 18px;
}
.tut-item h3{font-size:15.5px;margin-bottom:6px;}
.tut-item p{font-size:13.5px;color:var(--text-dim);}

/* certificate */
.cert-box{
  display:grid;grid-template-columns:1fr;gap:20px;
  background:linear-gradient(130deg,rgba(66,226,224,.09),rgba(30,24,51,.85));
  border:1px solid var(--line);border-radius:20px;padding:26px;
}
.cert-box img{border-radius:14px;width:100%;}
.cert-list{list-style:none;display:grid;gap:12px;}
.cert-list li{
  font-size:14px;color:#e1daf5;padding-left:22px;position:relative;
}
.cert-list li::before{
  content:"";position:absolute;left:0;top:9px;
  width:9px;height:9px;border-radius:50%;
  background:var(--cyan);
}

/* types */
.type-grid{display:grid;grid-template-columns:1fr;gap:14px;}
.type-card{
  border-radius:16px;overflow:hidden;
  border:1px solid var(--line);
  background:var(--card);
}
.type-card img{width:100%;height:180px;object-fit:cover;}
.type-card div{padding:16px 18px;}
.type-card h3{font-size:16px;margin-bottom:6px;}
.type-card p{font-size:13.5px;color:var(--text-dim);}

/* faq */
.faq-list{display:grid;gap:12px;}
details{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:14px;padding:16px 18px;
}
summary{
  cursor:pointer;font-size:15px;font-weight:600;
  list-style:none;
}
summary::-webkit-details-marker{display:none;}
summary::after{content:"+";float:right;color:var(--text-dim);font-weight:400;}
details[open] summary::after{content:"−";}
details p{margin-top:10px;font-size:13.5px;color:var(--text-dim);}

/* cta band */
.cta-band{
  text-align:center;
  background:linear-gradient(120deg,rgba(255,92,138,.18),rgba(139,108,255,.18));
  border:1px solid var(--line);
  border-radius:24px;
  padding:44px 22px;
}
.cta-band h2{font-size:22px;margin-bottom:10px;}
.cta-band p{font-size:14px;color:var(--text-dim);margin-bottom:24px;}
.cta-band .dl-row{justify-content:center;margin-top:0;}

/* footer */
footer{
  margin-top:40px;
  border-top:1px solid var(--line);
  padding:32px 0 40px;
  font-size:12.5px;
  color:#7e759a;
}
.foot-inner{display:grid;gap:14px;}
.foot-links{display:flex;flex-wrap:wrap;gap:8px 18px;}
.foot-links a{color:#8d84a8;}
.foot-links a:hover{color:#c9bef0;}
.foot-keywords{line-height:2;color:#6f678a;}
footer a.beian{color:#8d84a8;}
.foot-time{color:#6f678a;}

@media (min-width:768px){
  .hero{padding:80px 0 56px;}
  .hero-grid{grid-template-columns:1.05fr .95fr;gap:40px;}
  .hero-text h1{font-size:38px;}
  .hero-sub{font-size:16px;}
  .sec-head h2{font-size:27px;}
  section{padding:70px 0;}
  .update-list{grid-template-columns:repeat(2,1fr);}
  .rank-grid{grid-template-columns:repeat(2,1fr);}
  .calendar-row{grid-template-columns:repeat(4,1fr);}
  .wall{grid-template-columns:repeat(3,1fr);}
  .flow-grid{grid-template-columns:repeat(2,1fr);}
  .tut-list{grid-template-columns:repeat(2,1fr);}
  .type-grid{grid-template-columns:repeat(3,1fr);}
  .cert-box{grid-template-columns:.9fr 1.1fr;align-items:center;}
  .curve-stage{height:380px;}
  .curve-card{width:170px;}
  .curve-card img{height:240px;}
  .cc1{left:0;top:110px;}
  .cc2{left:132px;top:50px;}
  .cc3{left:266px;top:16px;}
  .cc4{left:400px;top:50px;}
  .cc5{left:532px;top:110px;}
  .foot-inner{grid-template-columns:1fr auto;align-items:center;}
}

@media (min-width:1024px){
  .head-inner{height:72px;}
  .brand img{height:38px;}
  .hero{padding:96px 0 64px;}
  .hero-text h1{font-size:46px;}
  .sec-head h2{font-size:30px;}
  .update-list{grid-template-columns:repeat(3,1fr);}
  .rank-grid{grid-template-columns:repeat(3,1fr);}
  .wall{grid-template-columns:repeat(5,1fr);}
  .flow-grid{grid-template-columns:repeat(4,1fr);}
  .type-grid{grid-template-columns:repeat(3,1fr);}
  .type-card img{height:220px;}
  .curve-stage{height:440px;}
  .curve-card{width:190px;}
  .curve-card img{height:270px;}
  .cc1{left:0;top:130px;}
  .cc2{left:150px;top:58px;}
  .cc3{left:300px;top:18px;}
  .cc4{left:450px;top:58px;}
  .cc5{left:600px;top:130px;}
}
@media (max-width:480px){
  .curve-stage{height:270px;}
  .curve-card{width:112px;}
  .curve-card img{height:158px;}
  .cc1{left:0;top:82px;}
  .cc2{left:66px;top:36px;}
  .cc3{left:132px;top:10px;}
  .cc4{left:198px;top:36px;}
  .cc5{left:264px;top:82px;}
  .head-cta{display:none;}
}