:root{
  --bg-start:#0b0b18;
  --bg-end:#15152c;
  --card:#1a1a36;
  --card-hover:#20204a;
  --border:#2e2e58;
  --border-bright:#4a4a8a;
  --text:#e9e9f4;
  --text-strong:#f2f2ff;
  --text-soft:#c3c3de;
  --accent:#7c5cff;
  --accent-2:#9d7cff;
  --accent-soft:rgba(124,92,255,.16);
  --link:#a894ff;
  --link-hover:#cdbfff;
  --shadow:0 10px 30px rgba(0,0,0,.45);
  --radius:16px;
  --radius-sm:10px;
  --maxw:1240px;
}
html[data-theme="light"]{
  --bg-start:#f6f8ff;
  --bg-end:#eef2fb;
  --card:#ffffff;
  --card-hover:#ffffff;
  --border:rgba(40,62,100,.13);
  --border-bright:rgba(108,77,246,.5);
  --text:#142033;
  --text-strong:#0d0820;
  --text-soft:#3a4a66;
  --accent:#6c4df6;
  --accent-2:#1fb9d6;
  --accent-soft:rgba(108,77,246,.12);
  --link:#5a3ce0;
  --link-hover:#1a8fb0;
  --shadow:0 10px 30px rgba(30,50,90,.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-start),var(--bg-end));
  background-attachment:fixed;
  color:var(--text);
  line-height:1.7;
  font-size:16px;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto;border-radius:var(--radius-sm);}
a{color:var(--link);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--link-hover);text-decoration:underline;}
h1,h2,h3,h4{color:var(--text-strong);line-height:1.3;font-weight:700;}
h2{font-size:clamp(1.4rem,2.6vw,2rem);}
h3{font-size:clamp(1.05rem,1.8vw,1.25rem);}
p{color:var(--text-soft);}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px;}

/* 阅读进度条 */
#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;
}

/* 导航 */
#site-header{
  position:fixed;top:0;left:0;right:0;z-index:1500;
  background:rgba(15,15,32,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:box-shadow .3s ease,border-color .3s ease,background .3s ease;
}
html[data-theme="light"] #site-header{background:rgba(255,255,255,.78);}
#site-header.scrolled{
  border-bottom:1px solid var(--border);
  box-shadow:0 6px 24px rgba(0,0,0,.35);
}
html[data-theme="light"] #site-header.scrolled{box-shadow:0 6px 24px rgba(30,50,90,.12);}
.nav-inner{
  display:flex;align-items:center;gap:18px;
  height:66px;
}
.logo{
  display:flex;align-items:center;gap:10px;flex-shrink:0;
  font-weight:800;font-size:1.05rem;color:var(--text-strong);letter-spacing:.5px;
}
.logo:hover{text-decoration:none;color:var(--text-strong);}
.logo-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:1rem;font-weight:800;flex-shrink:0;
}
.nav-links{
  display:flex;align-items:center;gap:4px;list-style:none;
  margin-left:8px;flex:1;
}
.nav-links a{
  color:var(--text-soft);font-size:.92rem;padding:8px 10px;border-radius:8px;
  white-space:nowrap;transition:background .2s,color .2s;
}
.nav-links a:hover{background:var(--accent-soft);color:var(--text-strong);text-decoration:none;}
.nav-right{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.search-box{
  display:flex;align-items:center;gap:6px;
  background:var(--card);border:1px solid var(--border);border-radius:999px;
  padding:5px 6px 5px 14px;
}
.search-box input{
  background:transparent;border:none;outline:none;color:var(--text);
  font-size:.88rem;width:130px;font-family:inherit;
}
.search-box input::placeholder{color:var(--text-soft);opacity:.8;}
.search-box button{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  border:none;color:#fff;border-radius:999px;padding:6px 14px;cursor:pointer;
  font-size:.82rem;font-family:inherit;font-weight:600;transition:opacity .2s;
}
.search-box button:hover{opacity:.88;}
.theme-btn,.cta-btn{
  border:1px solid var(--border);background:var(--card);color:var(--text);
  border-radius:999px;padding:8px 14px;cursor:pointer;font-size:.85rem;
  font-family:inherit;transition:all .2s;white-space:nowrap;
}
.theme-btn:hover{border-color:var(--border-bright);color:var(--text-strong);}
.cta-btn{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#fff;border:none;font-weight:600;
}
.cta-btn:hover{opacity:.9;color:#fff;}
.hamburger{
  display:none;flex-direction:column;gap:5px;background:transparent;
  border:1px solid var(--border);border-radius:10px;padding:9px 10px;cursor:pointer;
}
.hamburger span{display:block;width:20px;height:2px;background:var(--text);border-radius:2px;transition:.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:2px;
  padding:10px 20px 18px;border-top:1px solid var(--border);
  background:rgba(15,15,32,.97);
}
html[data-theme="light"] .mobile-menu{background:rgba(255,255,255,.98);}
.mobile-menu.open{display:flex;}
.mobile-menu a{
  color:var(--text-soft);padding:11px 8px;border-radius:8px;font-size:.95rem;
}
.mobile-menu a:hover{background:var(--accent-soft);color:var(--text-strong);text-decoration:none;}

/* Hero */
.hero{
  position:relative;min-height:76vh;display:flex;align-items:center;justify-content:center;
  text-align:center;padding:130px 20px 70px;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(circle at 20% 20%,rgba(124,92,255,.22),transparent 45%),
    radial-gradient(circle at 80% 30%,rgba(31,185,214,.16),transparent 45%),
    radial-gradient(circle at 50% 90%,rgba(157,124,255,.14),transparent 50%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:1;max-width:860px;width:100%;}
.hero-logo{
  width:200px;height:200px;margin:0 auto 26px;border-radius:36px;
  object-fit:cover;border:2px solid var(--border-bright);
  box-shadow:0 0 60px rgba(124,92,255,.4);
}
.hero h1{
  font-size:clamp(1.6rem,4.2vw,2.9rem);
  margin-bottom:16px;letter-spacing:1px;
  background:linear-gradient(120deg,var(--text-strong),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero .slogan{
  font-size:clamp(1rem,2vw,1.25rem);color:var(--accent-2);
  font-weight:600;margin-bottom:16px;letter-spacing:2px;
}
.hero .intro{
  font-size:.98rem;max-width:660px;margin:0 auto 30px;
}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:44px;}
.btn{
  display:inline-block;padding:13px 28px;border-radius:999px;font-size:.95rem;
  font-weight:600;cursor:pointer;border:none;font-family:inherit;transition:all .25s;
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;
  box-shadow:0 8px 26px rgba(124,92,255,.4);
}
.btn-primary:hover{transform:translateY(-3px);color:#fff;text-decoration:none;box-shadow:0 12px 32px rgba(124,92,255,.55);}
.btn-ghost{
  background:transparent;color:var(--text-strong);border:1px solid var(--border-bright);
}
.btn-ghost:hover{background:var(--accent-soft);transform:translateY(-3px);text-decoration:none;}
.hero-stats{
  display:flex;justify-content:center;gap:clamp(24px,6vw,70px);flex-wrap:wrap;
  padding-top:26px;border-top:1px solid var(--border);
}
.stat-item .num{
  font-size:clamp(1.4rem,3vw,2rem);font-weight:800;
  background:linear-gradient(120deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat-item .label{font-size:.85rem;color:var(--text-soft);}

/* 通用 section */
.section{padding:64px 0;}
.section-head{margin-bottom:34px;}
.section-head h2{display:inline-block;position:relative;padding-left:16px;}
.section-head h2::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:5px;height:70%;border-radius:4px;
  background:linear-gradient(180deg,var(--accent),var(--accent-2));
}
.section-head p{margin-top:10px;font-size:.94rem;}

/* 热门漫画 */
.grid-cards{
  display:grid;grid-template-columns:repeat(4,1fr);gap:22px;
}
.manhua-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;position:relative;transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
  display:flex;flex-direction:column;
}
.manhua-card:hover{
  transform:translateY(-8px);border-color:var(--border-bright);
  box-shadow:var(--shadow);background:var(--card-hover);
}
.cover-wrap{position:relative;overflow:hidden;}
.cover-wrap img{width:100%;height:auto;aspect-ratio:220/310;object-fit:cover;border-radius:0;}
.badge{
  position:absolute;top:10px;left:10px;font-size:.72rem;font-weight:700;
  padding:4px 10px;border-radius:999px;color:#fff;backdrop-filter:blur(4px);
}
.badge.ongoing{background:rgba(124,92,255,.9);}
.badge.done{background:rgba(31,185,214,.9);}
.badge-views{
  position:absolute;top:10px;right:10px;font-size:.72rem;font-weight:600;
  padding:4px 10px;border-radius:999px;color:#fff;background:rgba(11,11,24,.72);
}
.card-body{padding:14px 15px 16px;display:flex;flex-direction:column;gap:6px;flex:1;}
.card-body h3{font-size:1rem;margin-bottom:2px;}
.card-meta{font-size:.8rem;color:var(--text-soft);line-height:1.6;}
.card-meta span{color:var(--text);}
.type-tag{
  display:inline-block;font-size:.72rem;padding:3px 10px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent-2);font-weight:600;margin-top:4px;
  align-self:flex-start;
}

/* 精品推荐 */
.feature-list{display:flex;flex-direction:column;gap:22px;}
.feature-card{
  display:flex;gap:24px;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px;transition:transform .28s,border-color .28s,box-shadow .28s;
}
.feature-card:hover{transform:translateY(-5px);border-color:var(--border-bright);box-shadow:var(--shadow);}
.feature-card img{
  width:300px;height:200px;object-fit:cover;flex-shrink:0;border-radius:var(--radius-sm);
}
.feature-text h3{margin-bottom:8px;}
.feature-text .f-meta{font-size:.83rem;color:var(--text-soft);margin-bottom:10px;}
.feature-text .f-meta span{color:var(--accent-2);font-weight:600;}
.feature-text p{font-size:.9rem;margin-bottom:12px;}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;}
.tag{
  font-size:.74rem;padding:4px 12px;border-radius:999px;
  border:1px solid var(--border-bright);color:var(--accent-2);
}

/* 详细介绍 */
.detail-split{
  display:grid;grid-template-columns:300px 1fr;gap:0;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
}
.detail-side{
  background:linear-gradient(160deg,rgba(124,92,255,.22),rgba(31,185,214,.12));
  padding:38px 28px;display:flex;flex-direction:column;justify-content:center;gap:16px;
  border-right:1px solid var(--border);
}
.detail-side .big-num{
  font-size:4.6rem;font-weight:900;line-height:1;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.detail-side .side-quote{font-size:1rem;font-weight:600;color:var(--text-strong);line-height:1.6;}
.detail-side img{width:100%;height:auto;aspect-ratio:1/1;object-fit:cover;border-radius:var(--radius-sm);}
.detail-main{padding:32px 34px;}
.detail-main h2{margin-bottom:18px;font-size:1.5rem;}
.detail-main h3{margin:22px 0 10px;font-size:1.08rem;color:var(--accent-2);}
.detail-main p{font-size:.93rem;margin-bottom:12px;}
.detail-tags{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px;padding-top:20px;border-top:1px solid var(--border);}
.detail-tags .tag{padding:7px 18px;font-size:.82rem;}

/* 角色 */
.role-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.role-card{
  display:flex;gap:18px;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:18px;transition:transform .28s,border-color .28s,box-shadow .28s;
}
.role-card:hover{transform:translateY(-5px);border-color:var(--border-bright);box-shadow:var(--shadow);}
.role-card img{
  width:180px;height:180px;object-fit:cover;flex-shrink:0;border-radius:var(--radius-sm);
  border:2px solid var(--border-bright);
}
.role-info h3{margin-bottom:6px;}
.role-role{
  display:inline-block;font-size:.74rem;padding:3px 12px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent-2);font-weight:600;margin-bottom:10px;
}
.role-info p{font-size:.86rem;margin-bottom:6px;}
.role-info p strong{color:var(--text-strong);font-weight:600;}

/* 平台介绍 */
.platform-split{display:grid;grid-template-columns:1.4fr 1fr;gap:34px;align-items:start;}
.platform-text p{font-size:.94rem;margin-bottom:14px;}
.platform-steps{display:flex;flex-direction:column;gap:16px;}
.step-item{
  display:flex;gap:14px;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius-sm);padding:16px;transition:border-color .25s,transform .25s;
}
.step-item:hover{border-color:var(--border-bright);transform:translateX(5px);}
.step-num{
  width:38px;height:38px;border-radius:12px;flex-shrink:0;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.95rem;
}
.step-item h3{font-size:.98rem;margin-bottom:4px;}
.step-item p{font-size:.84rem;}
.feature-squares{
  display:grid;grid-template-columns:repeat(6,1fr);gap:14px;margin-top:34px;
}
.square{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:18px 10px;text-align:center;font-size:.84rem;color:var(--text-soft);
  transition:border-color .25s,transform .25s,color .25s;
}
.square:hover{border-color:var(--border-bright);transform:translateY(-5px);color:var(--text-strong);}
.square .sq-ico{
  font-size:1.4rem;display:block;margin-bottom:8px;
  color:var(--accent-2);
}

/* 多端同步 */
.sync-split{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center;}
.sync-text p{font-size:.94rem;margin-bottom:14px;}
.sync-imgs{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;}
.sync-imgs img{
  width:220px;height:auto;aspect-ratio:400/600;object-fit:cover;
  border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow);
}

/* 公告 */
.notice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.notice-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;transition:transform .25s,border-color .25s,box-shadow .25s;
}
.notice-card:hover{transform:translateY(-5px);border-color:var(--border-bright);box-shadow:var(--shadow);}
.notice-date{font-size:.78rem;color:var(--accent-2);font-weight:600;margin-bottom:8px;}
.notice-card h3{font-size:1rem;margin-bottom:8px;}
.notice-card p{font-size:.85rem;}

/* 安全指南 */
.guide-split{display:grid;grid-template-columns:1.4fr 1fr;gap:34px;align-items:start;}
.guide-text p{font-size:.94rem;margin-bottom:14px;}
.check-list{display:flex;flex-direction:column;gap:12px;}
.check-item{
  display:flex;gap:12px;align-items:flex-start;background:var(--card);
  border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;
  font-size:.88rem;color:var(--text-soft);transition:border-color .25s;
}
.check-item:hover{border-color:var(--border-bright);}
.check-mark{
  width:22px;height:22px;border-radius:50%;flex-shrink:0;margin-top:2px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:800;
}

/* APP下载 */
.app-section{text-align:center;}
.app-section .app-inner{
  background:var(--card);border:1px solid var(--border);border-radius:24px;
  padding:52px 30px;position:relative;overflow:hidden;
}
.app-section .app-inner::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 50% 0%,rgba(124,92,255,.2),transparent 60%);
  pointer-events:none;
}
.app-inner h2{margin-bottom:16px;position:relative;z-index:1;}
.app-inner p{max-width:640px;margin:0 auto 30px;font-size:.95rem;position:relative;z-index:1;}
.app-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;position:relative;z-index:1;}

/* 评论 */
.comment-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.comment-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px 20px;transition:transform .25s,border-color .25s,box-shadow .25s;
}
.comment-card:hover{transform:translateY(-4px);border-color:var(--border-bright);box-shadow:var(--shadow);}
.comment-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;gap:10px;}
.comment-user{font-weight:700;color:var(--text-strong);font-size:.92rem;}
.comment-time{font-size:.76rem;color:var(--text-soft);}
.comment-card p{font-size:.88rem;}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);
  overflow:hidden;transition:border-color .25s;
}
.faq-item.open{border-color:var(--border-bright);}
.faq-q{
  width:100%;text-align:left;background:transparent;border:none;cursor:pointer;
  padding:18px 20px;font-size:.96rem;font-weight:600;color:var(--text-strong);
  font-family:inherit;display:flex;justify-content:space-between;align-items:center;gap:14px;
}
.faq-q .arrow{
  flex-shrink:0;width:22px;height:22px;border-radius:50%;
  background:var(--accent-soft);color:var(--accent-2);
  display:flex;align-items:center;justify-content:center;font-size:.8rem;
  transition:transform .3s;
}
.faq-item.open .faq-q .arrow{transform:rotate(180deg);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease;
  padding:0 20px;
}
.faq-item.open .faq-a{max-height:400px;padding:0 20px 18px;}
.faq-a p{font-size:.88rem;}

/* 侧栏布局 */
.layout-with-aside{display:grid;grid-template-columns:1fr 320px;gap:36px;align-items:start;}
.aside-col{display:flex;flex-direction:column;gap:24px;position:sticky;top:86px;}
.aside-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;
}
.aside-card h3{
  font-size:1rem;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border);
  display:flex;align-items:center;gap:8px;
}
.aside-card h3::before{
  content:"";width:4px;height:16px;border-radius:3px;
  background:linear-gradient(180deg,var(--accent),var(--accent-2));
}
.rank-list{list-style:none;display:flex;flex-direction:column;gap:11px;}
.rank-list li{display:flex;gap:12px;align-items:center;font-size:.86rem;}
.rank-num{
  width:24px;height:24px;border-radius:8px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  font-size:.76rem;font-weight:800;background:var(--accent-soft);color:var(--accent-2);
}
.rank-list li:nth-child(1) .rank-num{background:linear-gradient(135deg,#ffb020,#ff7a00);color:#fff;}
.rank-list li:nth-child(2) .rank-num{background:linear-gradient(135deg,#9d7cff,#6c4df6);color:#fff;}
.rank-list li:nth-child(3) .rank-num{background:linear-gradient(135deg,#1fb9d6,#0e8ba8);color:#fff;}
.rank-list li a{color:var(--text-soft);flex:1;}
.rank-list li a:hover{color:var(--link-hover);}
.rank-val{font-size:.76rem;color:var(--accent-2);font-weight:600;flex-shrink:0;}
.stat-list{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.stat-box{
  background:var(--accent-soft);border-radius:var(--radius-sm);padding:14px 10px;text-align:center;
}
.stat-box .sv{
  font-size:1.15rem;font-weight:800;color:var(--accent-2);display:block;
}
.stat-box .sl{font-size:.76rem;color:var(--text-soft);}

/* Footer */
#site-footer{
  border-top:1px solid var(--border);background:rgba(10,10,22,.6);
  padding:56px 0 28px;margin-top:40px;
}
html[data-theme="light"] #site-footer{background:rgba(255,255,255,.7);}
.footer-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-bottom:36px;
}
.footer-col h3{font-size:1rem;margin-bottom:16px;}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{font-size:.86rem;color:var(--text-soft);}
.footer-col ul a:hover{color:var(--link-hover);}
.friend-links{
  display:flex;flex-wrap:wrap;gap:10px 18px;padding:22px 0;
  border-top:1px solid var(--border);border-bottom:1px solid var(--border);
  margin-bottom:24px;
}
.friend-links a{font-size:.84rem;color:var(--text-soft);}
.friend-links a:hover{color:var(--link-hover);}
.footer-bottom{text-align:center;font-size:.82rem;color:var(--text-soft);line-height:2;}
.footer-bottom .legal-links{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;margin-top:8px;}
.footer-bottom .legal-links a{font-size:.82rem;}

/* 返回顶部 */
#back-top{
  position:fixed;right:24px;bottom:28px;z-index:1200;
  width:48px;height:48px;border-radius:50%;border:none;cursor:pointer;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;
  font-size:1.2rem;box-shadow:0 8px 24px rgba(124,92,255,.45);
  opacity:0;visibility:hidden;transform:translateY(16px);
  transition:opacity .3s,visibility .3s,transform .3s;
}
#back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
#back-top:hover{transform:translateY(-4px);}

/* 响应式 */
@media (max-width:1080px){
  .nav-links{display:none;}
  .search-box{display:none;}
  .hamburger{display:flex;}
  .grid-cards{grid-template-columns:repeat(3,1fr);}
  .feature-squares{grid-template-columns:repeat(3,1fr);}
  .layout-with-aside{grid-template-columns:1fr;}
  .aside-col{position:static;}
}
@media (max-width:820px){
  .grid-cards{grid-template-columns:repeat(2,1fr);}
  .role-grid{grid-template-columns:1fr;}
  .platform-split,.sync-split,.guide-split{grid-template-columns:1fr;}
  .detail-split{grid-template-columns:1fr;}
  .detail-side{border-right:none;border-bottom:1px solid var(--border);}
  .notice-grid{grid-template-columns:repeat(2,1fr);}
  .comment-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:repeat(2,1fr);}
  .feature-card{flex-direction:column;}
  .feature-card img{width:100%;height:auto;aspect-ratio:300/200;}
  .role-card{flex-direction:column;align-items:flex-start;}
  .role-card img{width:100%;height:auto;aspect-ratio:1/1;max-width:220px;}
}
@media (max-width:560px){
  .grid-cards{grid-template-columns:repeat(2,1fr);gap:14px;}
  .notice-grid{grid-template-columns:1fr;}
  .feature-squares{grid-template-columns:repeat(2,1fr);}
  .hero{padding:110px 16px 50px;min-height:auto;}
  .hero-logo{width:140px;height:140px;border-radius:28px;}
  .hero-cta{flex-direction:column;align-items:stretch;}
  .btn{width:100%;text-align:center;}
  .footer-grid{grid-template-columns:1fr;}
  .stat-list{grid-template-columns:1fr 1fr;}
  .detail-main{padding:24px 20px;}
  .sync-imgs img{width:100%;max-width:260px;}
  #back-top{right:16px;bottom:18px;width:44px;height:44px;}
}