:root{
  --bg-start:#0b0b18;
  --bg-end:#15152c;
  --card:#1a1a36;
  --card-2:#20204a;
  --border:#2e2e58;
  --border-hi:#6a5cff;
  --text:#e9e9f4;
  --title:#f2f2ff;
  --accent:#7c5cff;
  --accent-2:#9d7cff;
  --accent-3:#1fb9d6;
  --link:#9d7cff;
  --link-hover:#c2b0ff;
  --ok:#37d67a;
  --warn:#ffb020;
  --shadow:0 10px 30px rgba(0,0,0,.45);
}
html[data-theme="light"]{
  --bg-start:#f6f8ff;
  --bg-end:#eef2fb;
  --card:#ffffff;
  --card-2:#f2f5ff;
  --border:rgba(40,62,100,.13);
  --border-hi:#6c4df6;
  --text:#142033;
  --title:#0d0820;
  --accent:#6c4df6;
  --accent-2:#4d33d6;
  --accent-3:#1fb9d6;
  --link:#4d33d6;
  --link-hover:#6c4df6;
  --shadow:0 10px 30px rgba(40,62,100,.14);
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  background:linear-gradient(160deg,var(--bg-start),var(--bg-end));
  background-attachment:fixed;
  color:var(--text);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:10px;}
a{color:var(--link);text-decoration:none;transition:color .2s,text-decoration .2s;}
a:hover{color:var(--link-hover);text-decoration:underline;}
h1,h2,h3,h4{color:var(--title);line-height:1.3;font-weight:800;}
h1{font-size:clamp(1.6rem,3.4vw,2.6rem);}
h2{font-size:clamp(1.3rem,2.4vw,1.9rem);}
h3{font-size:clamp(1.02rem,1.6vw,1.22rem);}
p{color:var(--text);}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}
.section{padding:64px 0;}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:28px;}
.section-head h2{position:relative;padding-left:16px;}
.section-head h2::before{content:"";position:absolute;left:0;top:8%;height:84%;width:6px;border-radius:6px;background:linear-gradient(180deg,var(--accent),var(--accent-3));}
.section-head .sub{color:var(--text);opacity:.82;font-size:.95rem;}
.tag{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.76rem;border:1px solid var(--border);background:var(--card-2);color:var(--text);}
.tag.hot{border-color:var(--accent);color:var(--accent-2);}
.tag.ok{border-color:var(--ok);color:var(--ok);}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:12px;border:1px solid var(--border);background:var(--card);color:var(--title);font-weight:700;cursor:pointer;font-size:.95rem;transition:transform .2s,box-shadow .2s,border-color .2s,background .2s;}
.btn:hover{transform:translateY(-2px);border-color:var(--border-hi);text-decoration:none;box-shadow:0 8px 22px rgba(124,92,255,.28);}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));border-color:transparent;color:#fff;}
.btn-primary:hover{color:#fff;}
.btn-ghost{background:transparent;}
/* progress */
#progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--accent),var(--accent-3));z-index:1200;transition:width .1s linear;}
/* header */
header.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);background:rgba(11,11,24,.62);border-bottom:1px solid transparent;transition:background .3s,border-color .3s,box-shadow .3s;}
html[data-theme="light"] header.site-header{background:rgba(246,248,255,.78);}
header.site-header.scrolled{border-bottom:1px solid var(--border);box-shadow:0 6px 24px rgba(0,0,0,.28);}
.nav-wrap{display:flex;align-items:center;gap:18px;height:68px;}
.logo{display:flex;align-items:center;gap:10px;font-weight:900;color:var(--title);font-size:1.02rem;letter-spacing:.3px;flex:0 0 auto;max-width:330px;}
.logo:hover{text-decoration:none;color:var(--title);}
.logo .dot{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--accent),var(--accent-3));display:flex;align-items:center;justify-content:center;font-size:.95rem;color:#fff;font-weight:900;flex:0 0 auto;}
.logo span.logo-text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
nav.main-nav{display:flex;gap:4px;margin-left:auto;}
nav.main-nav a{padding:8px 12px;border-radius:10px;font-size:.92rem;color:var(--text);font-weight:600;white-space:nowrap;}
nav.main-nav a:hover{background:var(--card-2);color:var(--title);text-decoration:none;}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.search-box{display:flex;align-items:center;gap:6px;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:6px 10px;}
.search-box input{background:transparent;border:none;outline:none;color:var(--text);width:130px;font-size:.9rem;font-family:inherit;}
.search-box input::placeholder{color:var(--text);opacity:.55;}
.icon-btn{width:40px;height:40px;border-radius:12px;border:1px solid var(--border);background:var(--card);color:var(--title);cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center;transition:border-color .2s,transform .2s;}
.icon-btn:hover{border-color:var(--border-hi);transform:translateY(-2px);}
.hamburger{display:none;width:42px;height:40px;border-radius:12px;border:1px solid var(--border);background:var(--card);cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px;}
.hamburger span{display:block;width:20px;height:2px;background:var(--title);border-radius:2px;transition:transform .3s,opacity .3s;}
.hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.active span:nth-child(2){opacity:0;}
.hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-menu{display:none;flex-direction:column;gap:4px;padding:12px 20px 20px;border-top:1px solid var(--border);background:rgba(11,11,24,.96);}
html[data-theme="light"] .mobile-menu{background:rgba(246,248,255,.98);}
.mobile-menu.open{display:flex;}
.mobile-menu a{padding:11px 12px;border-radius:10px;color:var(--text);font-weight:600;}
.mobile-menu a:hover{background:var(--card-2);text-decoration:none;color:var(--title);}
.mobile-menu .search-box{width:100%;}
.mobile-menu .search-box input{width:100%;}
/* hero */
.hero{min-height:76vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:120px 0 60px;position:relative;overflow:hidden;}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 20%,rgba(124,92,255,.22),transparent 55%),radial-gradient(circle at 82% 72%,rgba(31,185,214,.16),transparent 55%);pointer-events:none;}
.hero .container{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;gap:20px;}
.hero-logo{width:200px;height:200px;border-radius:40px;border:1px solid var(--border);box-shadow:var(--shadow);object-fit:cover;}
.hero h1{max-width:900px;}
.hero .slogan{font-size:1.08rem;color:var(--accent-2);font-weight:700;letter-spacing:.5px;}
.hero .intro{max-width:760px;font-size:1rem;opacity:.92;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:6px;}
.hero-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:26px;width:100%;max-width:820px;}
.stat{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px 12px;box-shadow:var(--shadow);}
.stat b{display:block;font-size:1.55rem;color:var(--title);font-weight:900;}
.stat span{font-size:.86rem;opacity:.85;}
/* grid cards */
.grid-cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;overflow:hidden;display:flex;flex-direction:column;transition:transform .25s,border-color .25s,box-shadow .25s;position:relative;}
.card:hover{transform:translateY(-8px);border-color:var(--border-hi);box-shadow:0 16px 34px rgba(124,92,255,.24);}
.card .cover-wrap{position:relative;overflow:hidden;background:var(--card-2);}
.card .cover-wrap img{width:100%;height:auto;border-radius:0;transition:transform .4s;}
.card:hover .cover-wrap img{transform:scale(1.05);}
.badge{position:absolute;top:10px;left:10px;z-index:3;font-size:.72rem;padding:3px 9px;border-radius:999px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2));}
.badge.read{left:auto;right:10px;background:rgba(11,11,24,.78);border:1px solid var(--border);color:#e9e9f4;}
.card-body{padding:14px 15px 18px;display:flex;flex-direction:column;gap:8px;flex:1;}
.card-body h3{font-size:1.02rem;}
.meta{font-size:.83rem;opacity:.86;display:flex;flex-wrap:wrap;gap:6px 12px;}
.meta b{color:var(--title);font-weight:700;}
.card-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto;padding-top:8px;}
/* featured */
.featured-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.feature-card{display:flex;gap:16px;background:var(--card);border:1px solid var(--border);border-radius:16px;padding:16px;transition:transform .25s,border-color .25s,box-shadow .25s;}
.feature-card:hover{transform:translateY(-6px);border-color:var(--border-hi);box-shadow:0 14px 30px rgba(124,92,255,.22);}
.feature-card img{width:300px;height:200px;object-fit:cover;flex:0 0 300px;border-radius:12px;}
.feature-card .fc-body{display:flex;flex-direction:column;gap:8px;min-width:0;}
.feature-card p{font-size:.9rem;opacity:.92;}
.feature-card .fc-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto;}
/* intro split */
.split{display:grid;grid-template-columns:320px minmax(0,1fr);gap:26px;align-items:start;}
.side-panel{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:26px 22px;position:sticky;top:92px;box-shadow:var(--shadow);}
.side-panel .big-num{font-size:4.4rem;font-weight:900;line-height:1;background:linear-gradient(135deg,var(--accent),var(--accent-3));-webkit-background-clip:text;background-clip:text;color:transparent;}
.side-panel .quote{margin-top:14px;font-size:.98rem;color:var(--title);font-weight:700;}
.side-panel .side-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.article-box{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:28px 26px;box-shadow:var(--shadow);}
.article-box h3{margin-top:22px;margin-bottom:8px;}
.article-box h3:first-of-type{margin-top:0;}
.article-box p{margin-bottom:12px;font-size:.97rem;}
.feature-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:24px;}
.feature-strip .fs{background:var(--card-2);border:1px solid var(--border);border-radius:14px;padding:14px;text-align:center;font-weight:700;color:var(--title);font-size:.92rem;}
/* characters */
.char-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.char-card{display:flex;gap:16px;background:var(--card);border:1px solid var(--border);border-radius:16px;padding:16px;transition:transform .25s,border-color .25s,box-shadow .25s;}
.char-card:hover{transform:translateY(-6px);border-color:var(--border-hi);box-shadow:0 14px 30px rgba(124,92,255,.2);}
.char-card img{width:180px;height:180px;object-fit:cover;flex:0 0 180px;border-radius:14px;}
.char-card .cc-body{display:flex;flex-direction:column;gap:7px;min-width:0;}
.char-card p{font-size:.9rem;opacity:.92;}
/* platform */
.platform-split{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:26px;align-items:start;}
.steps{display:flex;flex-direction:column;gap:14px;}
.step{display:flex;gap:14px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:15px 16px;}
.step .num{width:38px;height:38px;flex:0 0 38px;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;font-weight:900;display:flex;align-items:center;justify-content:center;}
.step h3{font-size:1rem;margin-bottom:2px;}
.step p{font-size:.88rem;opacity:.9;}
.mini-features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:24px;}
.mini-features .mf{background:var(--card-2);border:1px solid var(--border);border-radius:14px;padding:16px;text-align:center;}
.mini-features .mf b{display:block;color:var(--title);font-size:.98rem;margin-bottom:4px;}
.mini-features .mf span{font-size:.83rem;opacity:.86;}
/* devices */
.device-split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:26px;align-items:center;}
.device-figs{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;}
.device-figs img{width:400px;height:600px;object-fit:cover;border:1px solid var(--border);box-shadow:var(--shadow);}
/* notices */
.notice-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.notice{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px;transition:transform .25s,border-color .25s;}
.notice:hover{transform:translateY(-6px);border-color:var(--border-hi);}
.notice .date{font-size:.8rem;color:var(--accent-2);font-weight:700;}
.notice h3{margin:8px 0 6px;font-size:1rem;}
.notice p{font-size:.88rem;opacity:.9;}
/* guide */
.guide-split{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:26px;align-items:start;}
.check-list{display:flex;flex-direction:column;gap:12px;}
.check-list .ck{display:flex;gap:10px;align-items:flex-start;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:13px 15px;font-size:.92rem;}
.check-list .ck .tick{color:var(--ok);font-weight:900;flex:0 0 auto;}
/* app */
.app-box{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:40px 26px;text-align:center;box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;gap:18px;}
.app-box p{max-width:760px;font-size:.98rem;opacity:.93;}
.app-cta{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;}
/* comments */
.comment-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
.comment{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:16px 18px;transition:transform .25s,border-color .25s;}
.comment:hover{transform:translateY(-5px);border-color:var(--border-hi);}
.comment .ch{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:8px;}
.comment .uname{font-weight:800;color:var(--title);font-size:.95rem;}
.comment .time{font-size:.78rem;opacity:.72;}
.comment p{font-size:.9rem;opacity:.94;}
/* faq */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq{background:var(--card);border:1px solid var(--border);border-radius:14px;overflow:hidden;}
.faq .q{width:100%;text-align:left;background:transparent;border:none;color:var(--title);font-family:inherit;font-size:1rem;font-weight:700;padding:16px 18px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;}
.faq .q .arrow{transition:transform .3s;color:var(--accent-2);font-weight:900;}
.faq.open .q .arrow{transform:rotate(45deg);}
.faq .a{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 18px;}
.faq.open .a{max-height:400px;padding-bottom:16px;}
.faq .a p{font-size:.92rem;opacity:.93;}
/* sidebar layout */
.content-with-aside{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:26px;align-items:start;}
aside.sidebar{display:flex;flex-direction:column;gap:20px;position:sticky;top:92px;}
.widget{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px;box-shadow:var(--shadow);}
.widget h3{font-size:1.02rem;margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border);}
.rank-list{display:flex;flex-direction:column;gap:10px;}
.rank-item{display:flex;gap:10px;align-items:center;font-size:.9rem;}
.rank-item .rk{width:26px;height:26px;flex:0 0 26px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:.8rem;background:var(--card-2);border:1px solid var(--border);color:var(--title);}
.rank-item .rk.top{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;border-color:transparent;}
.rank-item a{color:var(--text);font-weight:600;}
.rank-item a:hover{color:var(--link-hover);}
.rank-item .val{margin-left:auto;font-size:.8rem;opacity:.8;}
.stat-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;}
.stat-list .sl{background:var(--card-2);border:1px solid var(--border);border-radius:12px;padding:12px;text-align:center;}
.stat-list .sl b{display:block;color:var(--title);font-size:1.1rem;font-weight:900;}
.stat-list .sl span{font-size:.78rem;opacity:.85;}
/* footer */
footer.site-footer{background:var(--card);border-top:1px solid var(--border);margin-top:40px;padding:52px 0 26px;}
.footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:26px;}
.footer-col h4{font-size:1rem;margin-bottom:14px;}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:9px;}
.footer-col a{color:var(--text);font-size:.9rem;opacity:.9;}
.footer-col a:hover{color:var(--link-hover);}
.friend-links{margin-top:34px;padding-top:22px;border-top:1px solid var(--border);display:flex;flex-wrap:wrap;gap:10px 18px;font-size:.88rem;}
.friend-links a{color:var(--link);}
.copyright{margin-top:22px;padding-top:18px;border-top:1px solid var(--border);display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;font-size:.84rem;opacity:.88;}
.copyright .links{display:flex;flex-wrap:wrap;gap:14px;}
/* back to top */
#backTop{position:fixed;right:22px;bottom:26px;width:48px;height:48px;border-radius:14px;border:1px solid var(--border);background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;font-size:1.15rem;font-weight:900;cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .3s,transform .3s;z-index:1100;box-shadow:var(--shadow);}
#backTop.show{opacity:1;pointer-events:auto;}
#backTop:hover{transform:translateY(-4px);}
/* responsive */
@media (max-width:1080px){
  nav.main-nav{display:none;}
  .hamburger{display:flex;}
  .search-box{display:none;}
  .grid-cards{grid-template-columns:repeat(3,minmax(0,1fr));}
  .content-with-aside{grid-template-columns:minmax(0,1fr);}
  aside.sidebar{position:static;}
  .split{grid-template-columns:minmax(0,1fr);}
  .side-panel{position:static;}
  .platform-split,.guide-split,.device-split{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .notice-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:820px){
  .featured-list{grid-template-columns:minmax(0,1fr);}
  .char-grid{grid-template-columns:minmax(0,1fr);}
  .comment-grid{grid-template-columns:minmax(0,1fr);}
  .feature-card{flex-direction:column;}
  .feature-card img{width:100%;height:auto;flex:0 0 auto;}
  .feature-strip,.mini-features{grid-template-columns:repeat(2,minmax(0,1fr));}
  .device-figs img{width:100%;height:auto;max-width:400px;}
}
@media (max-width:620px){
  .grid-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}
  .hero{padding:104px 0 48px;}
  .hero-logo{width:150px;height:150px;border-radius:32px;}
  .hero-stats{grid-template-columns:minmax(0,1fr);}
  .char-card{flex-direction:column;}
  .char-card img{width:100%;height:auto;flex:0 0 auto;}
  .notice-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .feature-strip,.mini-features{grid-template-columns:minmax(0,1fr);}
  .nav-wrap{gap:10px;}
  .logo{font-size:.92rem;max-width:200px;}
}