:root{
  --bg-1:#0b0b18;
  --bg-2:#15152c;
  --card:#1a1a36;
  --border:#2e2e58;
  --text:#e9e9f4;
  --title:#f2f2ff;
  --accent:#7c5cff;
  --accent-2:#9d7cff;
  --link:#b9a6ff;
  --shadow:0 10px 30px rgba(0,0,0,.45);
}
html[data-theme="light"]{
  --bg-1:#f6f8ff;
  --bg-2:#eef2fb;
  --card:#ffffff;
  --border:rgba(40,62,100,.13);
  --text:#142033;
  --title:#0d0820;
  --accent:#6c4df6;
  --accent-2:#1fb9d6;
  --link:#5a3fe0;
  --shadow:0 10px 30px rgba(40,62,100,.12);
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  background:linear-gradient(160deg,var(--bg-1),var(--bg-2));
  color:var(--text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:var(--link);text-decoration:none;transition:color .2s;}
a:hover{color:var(--accent-2);text-decoration:underline;}
img{display:block;max-width:100%;height:auto;border-radius:10px;}
h1,h2,h3,h4{color:var(--title);line-height:1.3;font-weight:700;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}

/* progress bar */
#progress-bar{
  position:fixed;top:0;left:0;height:3px;width:0%;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  z-index:2000;transition:width .1s linear;
}

/* header */
header#topbar{
  position:fixed;top:0;left:0;right:0;z-index:1500;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  background:rgba(11,11,24,.72);
  border-bottom:1px solid transparent;
  transition:box-shadow .3s,border-color .3s,background .3s;
}
html[data-theme="light"] header#topbar{background:rgba(246,248,255,.82);}
header#topbar.scrolled{
  border-bottom:1px solid var(--border);
  box-shadow:0 6px 24px rgba(0,0,0,.28);
}
html[data-theme="light"] header#topbar.scrolled{box-shadow:0 6px 24px rgba(40,62,100,.14);}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;height:68px;
}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  width:38px;height:38px;border-radius:11px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:18px;
  box-shadow:0 6px 18px rgba(124,92,255,.45);
}
.logo-text{font-size:17px;font-weight:800;color:var(--title);letter-spacing:.5px;}
nav.main-nav{display:flex;align-items:center;gap:4px;flex-wrap:nowrap;}
nav.main-nav a{
  color:var(--text);font-size:14.5px;padding:8px 11px;border-radius:8px;
  transition:background .2s,color .2s;white-space:nowrap;
}
nav.main-nav a:hover{background:rgba(124,92,255,.16);color:var(--accent-2);text-decoration:none;}
.nav-right{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.search-box{position:relative;}
.search-box input{
  width:170px;padding:8px 12px 8px 32px;border-radius:20px;
  border:1px solid var(--border);background:var(--card);color:var(--text);
  font-size:13.5px;outline:none;transition:border-color .2s,width .25s;
}
.search-box input:focus{border-color:var(--accent);width:200px;}
.search-box::before{
  content:"⌕";position:absolute;left:11px;top:50%;transform:translateY(-50%);
  color:var(--accent-2);font-size:16px;pointer-events:none;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  border:none;cursor:pointer;font-family:inherit;font-size:14px;font-weight:600;
  padding:9px 18px;border-radius:22px;transition:transform .2s,box-shadow .2s,background .2s,color .2s;
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#fff;box-shadow:0 6px 18px rgba(124,92,255,.4);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(124,92,255,.55);text-decoration:none;color:#fff;}
.btn-ghost{
  background:transparent;color:var(--text);border:1px solid var(--border);
}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-2);text-decoration:none;transform:translateY(-2px);}
.icon-btn{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--border);
  background:var(--card);color:var(--text);cursor:pointer;font-size:16px;
  display:flex;align-items:center;justify-content:center;transition:border-color .2s,transform .2s;
}
.icon-btn:hover{border-color:var(--accent);transform:translateY(-2px);}
.hamburger{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);
  background:var(--card);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .3s,opacity .3s;}
.hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.hamburger.active span:nth-child(2){opacity:0;}
.hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* mobile nav */
.mobile-nav{
  display:none;flex-direction:column;gap:2px;
  padding:12px 20px 20px;border-top:1px solid var(--border);
  background:rgba(11,11,24,.96);
}
html[data-theme="light"] .mobile-nav{background:rgba(246,248,255,.97);}
.mobile-nav.open{display:flex;}
.mobile-nav a{
  color:var(--text);padding:11px 12px;border-radius:9px;font-size:15px;
}
.mobile-nav a:hover{background:rgba(124,92,255,.16);color:var(--accent-2);text-decoration:none;}

/* hero */
.hero{
  min-height:74vh;display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:130px 20px 70px;position:relative;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;top:-140px;left:50%;transform:translateX(-50%);
  width:640px;height:640px;border-radius:50%;
  background:radial-gradient(circle,rgba(124,92,255,.32),transparent 68%);
  pointer-events:none;
}
.hero-logo{
  width:200px;height:200px;border-radius:40px;overflow:hidden;
  border:2px solid var(--border);box-shadow:var(--shadow);margin-bottom:26px;
  position:relative;z-index:1;background:var(--card);
}
.hero-logo img{width:100%;height:100%;object-fit:cover;border-radius:38px;}
.hero h1{
  font-size:clamp(26px,4.4vw,46px);max-width:900px;margin-bottom:16px;
  position:relative;z-index:1;
  background:linear-gradient(120deg,var(--title),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero-slogan{
  font-size:clamp(15px,2vw,19px);color:var(--accent-2);font-weight:600;
  margin-bottom:18px;position:relative;z-index:1;
}
.hero-desc{
  max-width:720px;font-size:15.5px;color:var(--text);opacity:.92;
  margin-bottom:32px;position:relative;z-index:1;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-bottom:52px;position:relative;z-index:1;}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:18px;justify-content:center;position:relative;z-index:1;
}
.stat-item{
  min-width:150px;padding:18px 26px;border-radius:16px;
  background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow);
}
.stat-num{
  font-size:26px;font-weight:800;
  background:linear-gradient(120deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.stat-label{font-size:13.5px;color:var(--text);opacity:.88;margin-top:4px;}

/* section */
section{padding:64px 0;}
.section-head{text-align:center;margin-bottom:40px;}
.section-head h2{font-size:clamp(22px,3vw,32px);margin-bottom:12px;}
.section-head p{color:var(--text);opacity:.85;font-size:15px;max-width:680px;margin:0 auto;}
.divider{
  width:64px;height:4px;border-radius:4px;margin:14px auto 0;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
}

/* comic grid */
.comic-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:22px;
}
.comic-card{
  background:var(--card);border:1px solid var(--border);border-radius:16px;
  overflow:hidden;position:relative;transition:transform .28s,box-shadow .28s,border-color .28s;
}
.comic-card:hover{transform:translateY(-8px);border-color:var(--accent);box-shadow:0 16px 34px rgba(124,92,255,.28);}
.comic-cover{position:relative;overflow:hidden;}
.comic-cover img{width:100%;height:auto;border-radius:0;transition:transform .4s;}
.comic-card:hover .comic-cover img{transform:scale(1.05);}
.badge{
  position:absolute;top:10px;padding:3px 10px;border-radius:12px;
  font-size:11.5px;font-weight:700;color:#fff;backdrop-filter:blur(4px);
}
.badge-status{left:10px;background:rgba(124,92,255,.92);}
.badge-hot{right:10px;background:rgba(31,185,214,.92);}
.comic-info{padding:14px 15px 18px;}
.comic-info h3{font-size:16px;margin-bottom:9px;}
.comic-meta{font-size:12.8px;line-height:1.9;color:var(--text);opacity:.86;}
.comic-meta span{display:block;}
.comic-meta b{color:var(--accent-2);font-weight:600;}
.comic-tags{margin-top:10px;display:flex;flex-wrap:wrap;gap:6px;}
.tag{
  font-size:11.5px;padding:3px 9px;border-radius:10px;
  background:rgba(124,92,255,.16);color:var(--accent-2);border:1px solid var(--border);
}

/* featured */
.feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.feature-card{
  display:flex;gap:18px;background:var(--card);border:1px solid var(--border);
  border-radius:16px;padding:18px;transition:transform .28s,border-color .28s,box-shadow .28s;
}
.feature-card:hover{transform:translateY(-6px);border-color:var(--accent);box-shadow:0 14px 30px rgba(124,92,255,.24);}
.feature-card img{width:300px;height:200px;object-fit:cover;flex-shrink:0;}
.feature-body h3{font-size:17px;margin-bottom:8px;}
.feature-body p{font-size:13.8px;opacity:.9;margin-bottom:10px;}
.feature-body .comic-meta{font-size:12.5px;}

/* detail */
.detail-wrap{display:grid;grid-template-columns:300px 1fr;gap:32px;align-items:start;}
.detail-side{
  background:linear-gradient(160deg,var(--accent),var(--accent-2));
  border-radius:20px;padding:34px 26px;color:#fff;position:relative;overflow:hidden;
}
.detail-side::after{
  content:"";position:absolute;right:-40px;bottom:-40px;width:150px;height:150px;
  border-radius:50%;background:rgba(255,255,255,.15);
}
.detail-num{font-size:74px;font-weight:900;line-height:1;opacity:.95;}
.detail-side h3{color:#fff;font-size:19px;margin:14px 0 10px;}
.detail-side p{font-size:14px;opacity:.95;}
.detail-main h2{font-size:26px;margin-bottom:16px;}
.detail-main h3{font-size:18px;margin:24px 0 10px;color:var(--accent-2);}
.detail-main p{font-size:15px;margin-bottom:12px;opacity:.94;}
.detail-tags{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.detail-tags .tag{padding:7px 16px;font-size:13px;}

/* characters */
.char-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.char-card{
  display:flex;gap:18px;background:var(--card);border:1px solid var(--border);
  border-radius:16px;padding:18px;transition:transform .28s,border-color .28s,box-shadow .28s;
}
.char-card:hover{transform:translateY(-6px);border-color:var(--accent);box-shadow:0 14px 30px rgba(124,92,255,.22);}
.char-card img{width:180px;height:180px;object-fit:cover;flex-shrink:0;border-radius:14px;}
.char-body h3{font-size:17px;margin-bottom:8px;}
.char-role{
  display:inline-block;font-size:12px;padding:3px 10px;border-radius:10px;
  background:rgba(124,92,255,.18);color:var(--accent-2);margin-bottom:10px;
}
.char-body p{font-size:13.8px;opacity:.9;margin-bottom:6px;}
.char-body b{color:var(--accent-2);}

/* platform */
.platform-wrap{display:grid;grid-template-columns:1.3fr 1fr;gap:34px;align-items:start;}
.platform-main h2{font-size:26px;margin-bottom:16px;}
.platform-main p{font-size:15px;margin-bottom:12px;opacity:.94;}
.platform-side{display:flex;flex-direction:column;gap:14px;}
.step-item{
  display:flex;gap:14px;background:var(--card);border:1px solid var(--border);
  border-radius:14px;padding:16px;transition:border-color .25s,transform .25s;
}
.step-item:hover{border-color:var(--accent);transform:translateX(6px);}
.step-num{
  width:36px;height:36px;border-radius:10px;flex-shrink:0;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:15px;
}
.step-item h4{font-size:15px;margin-bottom:4px;}
.step-item p{font-size:13.2px;opacity:.88;}
.feature-squares{
  display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:36px;
}
.square{
  background:var(--card);border:1px solid var(--border);border-radius:14px;
  padding:18px 16px;text-align:center;transition:transform .25s,border-color .25s;
}
.square:hover{transform:translateY(-6px);border-color:var(--accent);}
.square strong{display:block;font-size:15px;color:var(--title);margin-bottom:6px;}
.square span{font-size:12.8px;opacity:.85;}

/* sync */
.sync-wrap{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center;}
.sync-text h2{font-size:26px;margin-bottom:16px;}
.sync-text p{font-size:15px;margin-bottom:12px;opacity:.94;}
.sync-media{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;}
.sync-media img{box-shadow:var(--shadow);border:1px solid var(--border);}

/* notice */
.notice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.notice-card{
  background:var(--card);border:1px solid var(--border);border-radius:14px;padding:20px;
  transition:transform .25s,border-color .25s;
}
.notice-card:hover{transform:translateY(-6px);border-color:var(--accent);}
.notice-date{font-size:12.5px;color:var(--accent-2);font-weight:700;margin-bottom:8px;}
.notice-card h3{font-size:16px;margin-bottom:8px;}
.notice-card p{font-size:13.6px;opacity:.88;}

/* guide */
.guide-wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:34px;align-items:start;}
.guide-wrap h2{font-size:26px;margin-bottom:16px;}
.guide-wrap p{font-size:15px;margin-bottom:12px;opacity:.94;}
.check-list{list-style:none;display:flex;flex-direction:column;gap:12px;}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;background:var(--card);
  border:1px solid var(--border);border-radius:12px;padding:14px 16px;font-size:14px;
}
.check-list li::before{
  content:"✓";color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2));
  width:22px;height:22px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:13px;flex-shrink:0;
}

/* app download */
.app-section{text-align:center;}
.app-section h2{font-size:clamp(22px,3vw,30px);margin-bottom:14px;}
.app-section p{max-width:720px;margin:0 auto 30px;font-size:15px;opacity:.92;}
.app-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}

/* comments */
.comment-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.comment-card{
  background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px;
  transition:transform .25s,border-color .25s;
}
.comment-card:hover{transform:translateY(-5px);border-color:var(--accent);}
.comment-head{display:flex;align-items:center;gap:10px;margin-bottom:10px;}
.avatar{
  width:38px;height:38px;border-radius:50%;flex-shrink:0;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:15px;
}
.comment-user{font-size:14.5px;font-weight:700;color:var(--title);}
.comment-time{font-size:12px;opacity:.7;margin-left:auto;}
.comment-card p{font-size:13.8px;opacity:.92;}

/* faq */
.faq-list{max-width:900px;margin:0 auto;display:flex;flex-direction:column;gap:14px;}
.faq-item{
  background:var(--card);border:1px solid var(--border);border-radius:14px;overflow:hidden;
  transition:border-color .25s;
}
.faq-item.open{border-color:var(--accent);}
.faq-q{
  width:100%;text-align:left;background:transparent;border:none;cursor:pointer;
  padding:18px 20px;font-size:15.5px;font-weight:600;color:var(--title);
  font-family:inherit;display:flex;justify-content:space-between;align-items:center;gap:14px;
}
.faq-q::after{
  content:"+";font-size:22px;color:var(--accent-2);transition:transform .3s;flex-shrink:0;
}
.faq-item.open .faq-q::after{transform:rotate(45deg);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease;
  padding:0 20px;font-size:14px;opacity:.92;
}
.faq-item.open .faq-a{max-height:400px;padding:0 20px 18px;}

/* sidebar layout */
.layout-with-side{display:grid;grid-template-columns:1fr 320px;gap:32px;align-items:start;}
.sidebar{display:flex;flex-direction:column;gap:22px;}
.side-card{
  background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px;
}
.side-card h3{font-size:16.5px;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--border);}
.rank-list{list-style:none;display:flex;flex-direction:column;gap:10px;}
.rank-list li{display:flex;align-items:center;gap:11px;font-size:14px;}
.rank-num{
  width:24px;height:24px;border-radius:8px;flex-shrink:0;font-size:12.5px;font-weight:800;
  display:flex;align-items:center;justify-content:center;background:rgba(124,92,255,.18);color:var(--accent-2);
}
.rank-list li:nth-child(1) .rank-num,
.rank-list li:nth-child(2) .rank-num,
.rank-list li:nth-child(3) .rank-num{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;
}
.rank-list a{font-size:14px;}
.stat-list{display:flex;flex-direction:column;gap:12px;}
.stat-row{display:flex;justify-content:space-between;font-size:14px;padding-bottom:10px;border-bottom:1px dashed var(--border);}
.stat-row:last-child{border-bottom:none;padding-bottom:0;}
.stat-row span:last-child{color:var(--accent-2);font-weight:700;}

/* footer */
footer{
  background:rgba(0,0,0,.24);border-top:1px solid var(--border);
  padding:56px 0 26px;margin-top:20px;
}
html[data-theme="light"] footer{background:rgba(40,62,100,.05);}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-bottom:34px;}
.footer-col h4{font-size:15.5px;margin-bottom:14px;color:var(--title);}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:9px;}
.footer-col a{font-size:13.6px;color:var(--text);opacity:.88;}
.footer-col a:hover{color:var(--accent-2);opacity:1;text-decoration:underline;}
.friend-links{
  padding:18px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);
  display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center;font-size:13.4px;
}
.friend-links strong{color:var(--title);}
.friend-links a{font-size:13.4px;}
.footer-bottom{
  padding-top:22px;display:flex;flex-wrap:wrap;gap:10px 22px;justify-content:space-between;
  font-size:12.8px;opacity:.85;
}
.footer-bottom .links{display:flex;flex-wrap:wrap;gap:16px;}

/* back to top */
#back-top{
  position:fixed;right:24px;bottom:28px;width:46px;height:46px;border-radius:50%;
  border:none;cursor:pointer;z-index:1200;font-size:19px;color:#fff;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 8px 22px rgba(124,92,255,.5);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .3s,transform .3s,visibility .3s;
}
#back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
#back-top:hover{transform:translateY(-4px);}

/* responsive */
@media (max-width:1100px){
  .comic-grid{grid-template-columns:repeat(3,1fr);}
  .layout-with-side{grid-template-columns:1fr;}
  .sidebar{flex-direction:row;flex-wrap:wrap;}
  .side-card{flex:1 1 280px;}
}
@media (max-width:980px){
  nav.main-nav,.search-box{display:none;}
  .hamburger{display:flex;}
  .nav-right .btn-primary{display:none;}
  .feature-list{grid-template-columns:1fr;}
  .detail-wrap{grid-template-columns:1fr;}
  .char-grid{grid-template-columns:1fr;}
  .platform-wrap,.sync-wrap,.guide-wrap{grid-template-columns:1fr;}
  .notice-grid{grid-template-columns:repeat(2,1fr);}
  .comment-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:repeat(2,1fr);}
  .feature-squares{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:640px){
  .comic-grid{grid-template-columns:repeat(2,1fr);gap:14px;}
  .comic-info{padding:11px 11px 14px;}
  .comic-info h3{font-size:14.5px;}
  .comic-meta{font-size:11.8px;}
  .feature-card{flex-direction:column;}
  .feature-card img{width:100%;height:auto;}
  .char-card{flex-direction:column;align-items:center;text-align:center;}
  .char-card img{width:140px;height:140px;}
  .notice-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .hero{padding-top:110px;}
  .hero-logo{width:150px;height:150px;}
  .stat-item{min-width:120px;padding:14px 18px;}
  .stat-num{font-size:21px;}
  .sidebar{flex-direction:column;}
  section{padding:48px 0;}
  .detail-side{padding:26px 20px;}
  .detail-num{font-size:56px;}
}