/* roulang page: index */
:root{
  --bg-primary:#050C1A;
  --bg-secondary:#0A1528;
  --bg-panel:rgba(13,26,48,.72);
  --bg-panel-solid:#0D1B33;
  --accent:#34DFF5;
  --accent-rgb:52,223,245;
  --accent-blue:#7A7CFF;
  --text-main:#E8F2FF;
  --text-sub:#A8BBD4;
  --text-dim:#6C84A6;
  --success:#52D9A8;
  --star:#FFC46B;
  --warning:#FF9E6D;
  --border-glass:rgba(140,210,255,.18);
  --radius-large:20px;
  --radius-card:16px;
  --radius-sm:10px;
  --max-width:1200px;
  --space-section:100px;
  --shadow-primary:0 8px 30px rgba(52,223,245,.18),0 4px 14px rgba(52,223,245,.12),0 0 6px rgba(52,223,245,.3);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei UI","Noto Sans SC",-apple-system,BlinkMacSystemFont,sans-serif;
  background:var(--bg-primary);
  color:var(--text-main);
  line-height:1.7;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:radial-gradient(rgba(120,220,255,.2) 1px,transparent 1.2px);
  background-size:40px 40px;
  opacity:.16;
  pointer-events:none;
  z-index:0;
}
body::after{
  content:"";
  position:fixed;
  width:680px;
  height:680px;
  right:-160px;
  top:10%;
  background:radial-gradient(circle,rgba(52,223,245,.08),transparent 60%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit;color:inherit}
ul,ol{list-style:none}
.container{
  max-width:var(--max-width);
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
.section{padding:var(--space-section) 0;position:relative}
.bg-secondary{
  background:linear-gradient(180deg,rgba(5,12,26,.2),rgba(10,21,40,.52),rgba(5,12,26,.2));
  border-top:1px solid rgba(140,210,255,.06);
  border-bottom:1px solid rgba(140,210,255,.06);
}
.section-head{margin-bottom:52px}
.section-head .eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--accent);
  font-size:14px;
  font-weight:600;
  letter-spacing:.2px;
  margin-bottom:14px;
}
.section-head .eyebrow::before{
  content:"";
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--accent-blue);
  box-shadow:0 0 0 4px rgba(122,124,255,.16);
}
.section-head h2{
  font-size:clamp(28px,4vw,40px);
  font-weight:700;
  line-height:1.3;
  display:flex;
  align-items:center;
  gap:14px;
  letter-spacing:.2px;
}
.section-head h2::before{
  content:"";
  width:4px;
  height:26px;
  border-radius:3px;
  background:linear-gradient(180deg,var(--accent),var(--accent-blue));
  flex:none;
}
.section-head .sub{
  color:var(--text-sub);
  font-size:16px;
  max-width:720px;
  margin-top:14px;
  line-height:1.9;
}

/* header ------------------------------------------------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  height:72px;
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  background:rgba(5,12,26,.78);
  border-bottom:1px solid var(--border-glass);
  box-shadow:0 6px 24px rgba(0,0,0,.24);
}
@supports not ((backdrop-filter:blur(16px)) or (-webkit-backdrop-filter:blur(16px))){
  .site-header{background:rgba(8,16,30,.96)}
}
.header-inner{
  height:72px;
  display:flex;
  align-items:center;
  gap:18px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:none;
}
.brand-mark{
  width:36px;
  height:36px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:10px;
  background:linear-gradient(135deg,var(--accent) 10%,var(--accent-blue) 90%);
  color:#03101c;
  font-weight:800;
  font-size:19px;
  box-shadow:0 0 22px rgba(52,223,245,.4);
}
.brand-name{
  font-size:19px;
  font-weight:700;
  letter-spacing:.5px;
  white-space:nowrap;
}
.brand-name small{display:block;font-size:11px;font-weight:500;color:var(--text-dim);letter-spacing:1.2px}
.main-nav{
  flex:1;
  min-width:0;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:6px;
}
.main-nav .nav-link{
  padding:7px 13px;
  font-size:15px;
  color:var(--text-sub);
  border-radius:9px;
  position:relative;
  transition:color .25s,background .25s;
  white-space:nowrap;
}
.main-nav .nav-link:hover{
  color:var(--accent);
  background:rgba(52,223,245,.08);
}
.main-nav .nav-link.active{
  color:var(--accent);
  font-weight:600;
}
.main-nav .nav-link.active::after{
  content:"";
  position:absolute;
  left:13px;
  right:13px;
  bottom:-2px;
  height:2px;
  border-radius:2px;
  background:var(--accent);
  box-shadow:0 0 10px var(--accent);
}
.header-right{
  display:flex;
  align-items:center;
  gap:12px;
  flex:none;
}
.header-search{
  display:flex;
  align-items:center;
  background:rgba(13,27,51,.72);
  border:1px solid rgba(140,210,255,.14);
  border-radius:20px;
  height:36px;
  padding:0 4px 0 14px;
  gap:6px;
  transition:border-color .25s,box-shadow .25s;
}
.header-search:focus-within{
  border-color:rgba(52,223,245,.7);
  box-shadow:0 0 0 3px rgba(52,223,245,.12);
}
.header-search input{
  width:150px;
  border:0;
  background:transparent;
  outline:none;
  color:var(--text-main);
  font-size:13px;
}
.header-search input::placeholder{color:var(--text-dim)}
.header-search button{
  width:30px;
  height:30px;
  flex:none;
  border:0;
  border-radius:15px;
  background:linear-gradient(135deg,var(--accent),var(--accent-blue));
  color:#03101c;
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:filter .25s,transform .25s;
}
.header-search button:hover{
  filter:brightness(1.1);
  transform:scale(1.04);
}
.trend-wrap{
  display:flex;
  align-items:center;
  gap:6px;
}
.trend-label{color:var(--text-dim);font-size:11px;font-weight:600;white-space:nowrap}
.trend-chip{
  font-size:12px;
  color:var(--text-sub);
  background:rgba(122,124,255,.1);
  border:1px solid rgba(122,124,255,.18);
  padding:3px 10px;
  border-radius:20px;
  white-space:nowrap;
  transition:all .25s;
}
.trend-chip:hover{
  color:#fff;
  border-color:var(--accent);
  background:rgba(52,223,245,.12);
}
.menu-toggle{
  display:none;
  width:40px;
  height:40px;
  border:0;
  background:rgba(13,27,51,.8);
  border:1px solid rgba(140,210,255,.16);
  border-radius:10px;
  cursor:pointer;
  position:relative;
  flex:none;
}
.menu-toggle span{
  position:absolute;
  left:10px;
  right:10px;
  height:2px;
  background:var(--text-main);
  border-radius:2px;
  transition:all .3s;
}
.menu-toggle span:nth-child(1){top:12px}
.menu-toggle span:nth-child(2){top:19px}
.menu-toggle span:nth-child(3){top:26px}
.menu-toggle.open span:nth-child(1){top:19px;transform:rotate(45deg)}
.menu-toggle.open span:nth-child(2){opacity:0}
.menu-toggle.open span:nth-child(3){top:19px;transform:rotate(-45deg)}

/* buttons --------------------------------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 24px;
  border-radius:10px;
  font-size:16px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .25s,box-shadow .25s,background .25s,border-color .25s;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),#1AB8D6);
  color:#041019;
  box-shadow:0 0 20px rgba(52,223,245,.28),0 6px 22px rgba(52,223,245,.2),0 2px 6px rgba(52,223,245,.18);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 28px rgba(52,223,245,.4),0 10px 28px rgba(52,223,245,.24),0 4px 12px rgba(52,223,245,.22);
}
.btn-primary:active{
  transform:translateY(0);
  box-shadow:0 0 12px rgba(52,223,245,.25),0 2px 6px rgba(52,223,245,.16);
}
.btn-ghost{
  background:rgba(13,27,51,.6);
  border-color:rgba(140,210,255,.2);
  color:var(--text-main);
}
.btn-ghost:hover{
  border-color:var(--accent);
  color:var(--accent);
  background:rgba(52,223,245,.08);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(0)}
.btn-download{
  min-height:58px;
  padding:10px 22px;
  border-radius:var(--radius-card);
  gap:10px;
}
.btn-download small{display:block;font-weight:500;font-size:13px;opacity:.85;line-height:1.2}
.btn-download strong{font-size:17px;line-height:1.3}

/* hero ------------------------------------------------------- */
.hero{
  padding:78px 0 84px;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  top:-70px;
  left:38%;
  width:520px;
  height:420px;
  background:radial-gradient(closest-side,rgba(122,124,255,.18),transparent 70%);
  filter:blur(24px);
  pointer-events:none;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.08fr .92fr;
  gap:60px;
  align-items:center;
}
.hero-status{
  display:inline-flex;
  align-items:center;
  gap:9px;
  background:rgba(13,27,51,.76);
  border:1px solid rgba(52,223,245,.18);
  padding:6px 14px;
  border-radius:30px;
  font-size:14px;
  color:var(--text-sub);
  margin-bottom:24px;
}
.hero-status .dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--success);
  box-shadow:0 0 0 4px rgba(82,217,168,.14);
  animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}
.hero h1{
  font-size:clamp(34px,5vw,58px);
  line-height:1.22;
  font-weight:700;
  letter-spacing:.4px;
  margin-bottom:22px;
}
.hero h1 .brand-line{
  color:var(--accent);
}
.hero-lead{
  font-size:17px;
  line-height:1.9;
  color:var(--text-sub);
  margin-bottom:30px;
  max-width:560px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
}
.hero-safe{
  margin-top:22px;
  color:var(--text-dim);
  font-size:13px;
  display:flex;
  align-items:center;
  gap:8px;
}
.hero-safe .safe-ico{
  width:18px;
  height:18px;
  border-radius:50%;
  background:rgba(82,217,168,.16);
  color:var(--success);
  font-size:11px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
}
.hero-visual{
  position:relative;
}
.hero-frame{
  background:linear-gradient(155deg,rgba(13,27,51,.86),rgba(5,12,26,.72));
  border:1px solid rgba(140,210,255,.2);
  border-radius:24px;
  padding:14px;
  box-shadow:0 30px 80px rgba(0,0,0,.4),0 0 0 1px rgba(52,223,245,.06);
}
.hero-frame img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:16px;
}
.hero-float{
  position:absolute;
  display:flex;
  align-items:center;
  gap:10px;
  background:rgba(10,21,40,.9);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border:1px solid var(--border-glass);
  box-shadow:0 16px 40px rgba(0,0,0,.3);
  border-radius:14px;
  padding:11px 14px;
  font-size:13px;
}
.hero-float strong{display:block;font-size:14px;color:var(--text-main)}
.hero-float small{color:var(--text-sub);font-size:12px}
.hero-float-a{top:-18px;right:-8px}
.hero-float-b{bottom:12px;left:-20px}
.float-mark{
  width:34px;
  height:34px;
  border-radius:9px;
  background:linear-gradient(135deg,var(--accent),var(--accent-blue));
  color:#03101c;
  font-weight:700;
  font-size:17px;
  display:flex;
  align-items:center;
  justify-content:center;
  flex:none;
}

/* feature slider ------------------------------------------- */
.carousel-wrap{
  position:relative;
  display:grid;
  grid-template-columns:44px 1fr 44px;
  gap:18px;
  align-items:center;
}
.carousel-viewport{
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  scrollbar-width:none;
  padding:6px 2px 18px;
}
.carousel-viewport::-webkit-scrollbar{display:none}
.carousel-track{
  display:flex;
  gap:22px;
  width:max-content;
}
.feature-card{
  flex:0 0 320px;
  scroll-snap-align:start;
  background:rgba(10,21,40,.6);
  border:1px solid rgba(140,210,255,.1);
  border-radius:var(--radius-large);
  overflow:hidden;
  transition:border-color .3s,transform .3s,box-shadow .3s;
}
.feature-card:hover{
  border-color:rgba(52,223,245,.32);
  transform:translateY(-6px);
  box-shadow:0 22px 48px rgba(0,0,0,.34),0 0 24px rgba(52,223,245,.08);
}
.feature-thumb{
  aspect-ratio:16/9;
  overflow:hidden;
  position:relative;
  background:#0d1b33;
}
.feature-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .45s ease;
}
.feature-card:hover .feature-thumb img{transform:scale(1.04)}
.feature-tag{
  position:absolute;
  top:12px;
  left:12px;
  font-size:12px;
  padding:3px 10px;
  border-radius:20px;
  background:rgba(5,12,26,.65);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  color:var(--accent);
  border:1px solid rgba(52,223,245,.2);
}
.feature-body{padding:20px 22px 24px}
.feature-body h3{font-size:20px;font-weight:600;margin-bottom:8px}
.feature-body p{font-size:14px;color:var(--text-sub);line-height:1.8}
.carousel-btn{
  width:44px;
  height:44px;
  border-radius:50%;
  border:1px solid rgba(140,210,255,.24);
  background:rgba(10,21,40,.8);
  color:var(--text-main);
  font-size:24px;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:all .25s;
}
.carousel-btn:hover{
  color:var(--accent);
  border-color:var(--accent);
  background:rgba(52,223,245,.1);
  box-shadow:0 0 18px rgba(52,223,245,.16);
}
.carousel-indicators{
  display:flex;
  justify-content:center;
  gap:8px;
  margin-top:8px;
}
.carousel-indicators span{
  width:7px;
  height:7px;
  border-radius:10px;
  background:var(--text-dim);
  transition:all .3s;
}
.carousel-indicators span.active{
  width:26px;
  background:var(--accent);
}

/* system requirements -------------------------------------- */
.req-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:26px;
}
.req-card{
  background:var(--bg-panel);
  border:1px solid rgba(140,210,255,.12);
  border-radius:var(--radius-large);
  padding:28px 28px 10px;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  box-shadow:0 18px 44px rgba(0,0,0,.18);
}
@supports not ((backdrop-filter:blur(10px)) or (-webkit-backdrop-filter:blur(10px))){
  .req-card{background:#0a1528}
}
.req-head{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:24px;
}
.req-icon{
  width:40px;
  height:40px;
  border-radius:11px;
  background:linear-gradient(135deg,rgba(52,223,245,.2),rgba(122,124,255,.18));
  color:var(--accent);
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
}
.req-head h3{font-size:20px;font-weight:600}
.badge{
  display:inline-block;
  font-size:12px;
  padding:2px 10px;
  border-radius:20px;
  font-weight:600;
  margin-left:auto;
  white-space:nowrap;
}
.badge-green{
  color:var(--success);
  background:rgba(82,217,168,.12);
  border:1px solid rgba(82,217,168,.22);
}
.badge-blue{
  color:var(--accent);
  background:rgba(52,223,245,.1);
  border:1px solid rgba(52,223,245,.24);
}
.badge-dim{
  color:var(--text-dim);
  background:rgba(108,132,166,.1);
  border:1px solid rgba(108,132,166,.16);
}
.req-rows{border-top:1px solid rgba(140,210,255,.08)}
.req-row{
  min-height:52px;
  display:grid;
  grid-template-columns:36px 1fr auto;
  align-items:center;
  gap:12px;
  border-bottom:1px solid rgba(140,210,255,.06);
}
.req-row:last-child{border-bottom:0}
.req-ico{
  color:var(--accent-blue);
  font-size:16px;
  text-align:center;
}
.req-label{color:var(--text-sub);font-size:14px}
.req-val{
  color:var(--text-main);
  font-size:15px;
  font-weight:600;
  text-align:right;
}
.req-note{
  margin-top:26px;
  background:rgba(122,124,255,.08);
  border:1px solid rgba(122,124,255,.16);
  border-radius:var(--radius-card);
  padding:16px 20px;
  color:var(--text-sub);
  font-size:14px;
  display:flex;
  gap:12px;
  align-items:flex-start;
}
.req-note .note-ico{color:var(--accent-blue);flex:none}

/* news timeline -------------------------------------------- */
.news-wrap{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:28px;
  align-items:stretch;
}
.news-list{
  grid-column:1/-1;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:22px;
  align-items:start;
}
.news-card{
  background:rgba(10,21,40,.55);
  border:1px solid rgba(140,210,255,.1);
  border-radius:var(--radius-card);
  padding:24px 26px;
  transition:border-color .3s,box-shadow .3s,transform .3s;
}
.news-card:hover{
  border-color:rgba(52,223,245,.3);
  box-shadow:0 0 28px rgba(52,223,245,.08);
  transform:translateY(-3px);
}
.news-meta-line{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:12px;
}
.news-tag{
  font-size:12px;
  color:var(--accent);
  background:rgba(52,223,245,.1);
  border:1px solid rgba(52,223,245,.18);
  padding:2px 10px;
  border-radius:20px;
  white-space:nowrap;
}
.news-meta-line time{
  font-size:13px;
  color:var(--text-dim);
  white-space:nowrap;
}
.news-card h3{
  font-size:18px;
  font-weight:600;
  line-height:1.55;
  margin-bottom:10px;
  color:var(--text-main);
}
.news-card p{
  font-size:14px;
  line-height:1.8;
  color:var(--text-sub);
  margin-bottom:16px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--accent);
}
.news-link .arrow{transition:transform .25s}
.news-link:hover .arrow{transform:translateX(5px)}
.news-empty{
  grid-column:1/-1;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  padding:68px 24px;
  color:var(--text-dim);
  background:rgba(10,21,40,.5);
  border:1px dashed rgba(52,223,245,.16);
  border-radius:var(--radius-large);
  font-size:15px;
}
.news-empty::before{
  content:"";
  width:42px;
  height:42px;
  margin-bottom:14px;
  border-radius:12px;
  background:rgba(52,223,245,.1);
  border:1px solid rgba(52,223,245,.2);
  position:relative;
}
.news-empty::after{
  content:"✕";
  position:absolute;
  width:42px;
  color:var(--text-dim);
  display:flex;
  align-items:center;
  justify-content:center;
}
.news-empty{position:relative}
.news-more{
  grid-column:1/-1;
  text-align:center;
  margin-top:8px;
}

/* rating ---------------------------------------------------- */
.rating-layout{
  display:grid;
  grid-template-columns:320px 1fr;
  gap:30px;
  align-items:start;
}
.rating-score{
  background:linear-gradient(150deg,rgba(13,27,51,.82),rgba(10,21,40,.6));
  border:1px solid rgba(140,210,255,.12);
  border-radius:var(--radius-large);
  padding:34px;
  text-align:center;
}
.rating-num{
  font-size:64px;
  font-weight:700;
  line-height:1;
  background:linear-gradient(135deg,var(--accent),var(--accent-blue));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.rating-stars{
  color:var(--star);
  font-size:20px;
  letter-spacing:4px;
  margin:12px 0 8px;
}
.rating-note{color:var(--text-sub);font-size:14px}
.review-list{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:20px;
}
.review-card{
  background:rgba(10,21,40,.6);
  border:1px solid rgba(140,210,255,.1);
  border-radius:var(--radius-card);
  padding:20px 22px;
  transition:border-color .3s,box-shadow .3s;
}
.review-card:hover{
  border-color:rgba(52,223,245,.28);
  box-shadow:0 16px 34px rgba(0,0,0,.18);
}
.review-top{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:14px;
}
.review-avatar{
  width:38px;
  height:38px;
  border-radius:50%;
  background:linear-gradient(135deg,rgba(52,223,245,.48),rgba(122,124,255,.42));
  flex:none;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#04101a;
  font-weight:700;
  font-size:15px;
}
.review-user strong{display:block;font-weight:600;font-size:15px}
.review-user span{color:var(--text-dim);font-size:12px}
.review-text{
  font-size:14px;
  color:var(--text-sub);
  line-height:1.85;
}
.review-tag{
  display:flex;
  gap:8px;
  margin-top:12px;
}
.review-tag i{
  font-style:normal;
  font-size:12px;
  color:var(--accent);
  background:rgba(52,223,245,.08);
  border:1px solid rgba(52,223,245,.12);
  padding:2px 10px;
  border-radius:16px;
}

/* download section ----------------------------------------- */
.download-panel{
  background:
    linear-gradient(135deg,rgba(13,27,51,.92),rgba(5,12,26,.86)),
    url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  border:1px solid rgba(52,223,245,.16);
  border-radius:26px;
  padding:36px;
  display:grid;
  grid-template-columns:1.35fr .65fr;
  gap:40px;
  align-items:center;
  box-shadow:0 18px 60px rgba(0,0,0,.3);
}
.download-title h3{font-size:26px;font-weight:700;margin-bottom:10px}
.download-title p{color:var(--text-sub);font-size:15px;line-height:1.8}
.download-btn-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
  margin-top:26px;
}
.btn-download{
  background:rgba(10,21,40,.82);
  border:1px solid rgba(140,210,255,.14);
  color:var(--text-main);
  flex-direction:column;
  text-align:center;
  padding:14px 10px;
}
.btn-download:hover{
  border-color:var(--accent);
  box-shadow:0 0 22px rgba(52,223,245,.18);
  transform:translateY(-3px);
}
.btn-download .dl-ico{
  width:30px;
  height:30px;
  border-radius:8px;
  background:linear-gradient(135deg,var(--accent),var(--accent-blue));
  color:#03101c;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:800;
  font-size:15px;
  margin-bottom:4px;
}
.download-qr{
  background:rgba(13,27,51,.56);
  border:1px solid rgba(140,210,255,.1);
  border-radius:var(--radius-large);
  text-align:center;
  padding:28px 20px;
}
.qr-box{
  width:150px;
  height:150px;
  background:linear-gradient(#0b1b30,#0b1b30);
  padding:0;
  border-radius:12px;
  margin:0 auto 14px;
  display:flex;
  align-items:center;
  justify-content:center;
  border:1px solid rgba(140,210,255,.16);
  position:relative;
}
.qr-box::before{
  content:"";
  position:absolute;
  inset:8px;
  background:
    linear-gradient(90deg,transparent 0 22%,rgba(52,223,245,.65) 22% 27%,transparent 27% 46%,rgba(52,223,245,.55) 46% 52%,transparent 52% 72%,rgba(52,223,245,.6) 72% 78%,transparent 78%),
    linear-gradient(0deg,transparent 0 24%,rgba(52,223,245,.7) 24% 30%,transparent 30% 42%,rgba(52,223,245,.5) 42% 48%,transparent 48% 62%,rgba(52,223,245,.66) 62% 68%,transparent 68%),
    linear-gradient(90deg,transparent 0 8%,rgba(7,20,36,.5) 8% 28%,transparent 28% 40%,rgba(7,20,36,.45) 40% 60%,transparent 60% 78%,rgba(7,20,36,.4) 78% 92%,transparent 92%);
  opacity:.4;
}
.qr-box span{
  font-size:10px;
  color:#fff;
  background:rgba(5,12,26,.82);
  padding:4px 8px;
  border-radius:6px;
  z-index:1;
  letter-spacing:1px;
}
.download-qr p{font-size:15px;font-weight:600;color:var(--text-main)}
.download-qr small{color:var(--text-dim);font-size:13px;line-height:1.7}

/* faq ------------------------------------------------------- */
.faq-layout{
  max-width:940px;
  margin:0 auto;
}
.faq-item{
  background:rgba(10,21,40,.5);
  border:1px solid rgba(140,210,255,.1);
  border-radius:var(--radius-card);
  margin-bottom:14px;
  transition:border-color .25s,box-shadow .25s;
  overflow:hidden;
}
.faq-item:hover{border-color:rgba(52,223,245,.28)}
.faq-item[open]{
  border-color:rgba(52,223,245,.35);
  box-shadow:0 0 24px rgba(52,223,245,.1);
}
.faq-item summary{
  list-style:none;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:0 24px;
  min-height:58px;
  cursor:pointer;
  font-weight:600;
  font-size:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{
  width:28px;
  height:28px;
  border-radius:50%;
  border:1px solid rgba(52,223,245,.4);
  color:var(--accent);
  flex:none;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:17px;
  font-weight:300;
  transition:transform .3s,border-color .3s;
  position:relative;
}
.faq-icon::before{
  content:"";
  width:11px;
  height:1.6px;
  background:currentColor;
  position:absolute;
}
.faq-icon::after{
  content:"";
  width:1.6px;
  height:11px;
  background:currentColor;
  position:absolute;
  transition:opacity .2s;
}
.faq-item[open] .faq-icon{transform:rotate(135deg)}
.faq-answer{
  padding:2px 24px 24px;
  color:var(--text-sub);
  font-size:15px;
  line-height:1.9;
  border-left:3px solid var(--accent);
  margin-left:24px;
  padding-left:14px;
}

/* bottom cta ----------------------------------------------- */
.bottom-cta{
  background:
    radial-gradient(700px 300px at 80% 100%,rgba(52,223,245,.12),transparent 60%),
    radial-gradient(500px 230px at 10% 0,rgba(122,124,255,.1),transparent 60%),
    rgba(10,21,40,.3);
  border-top:1px solid rgba(140,210,255,.08);
}
.bottom-cta-inner{
  text-align:center;
  padding:30px 0;
}
.bottom-cta-inner h2{
  font-size:clamp(28px,4vw,42px);
  font-weight:700;
  margin-bottom:16px;
}
.bottom-cta-inner p{
  max-width:620px;
  margin:0 auto 30px;
  color:var(--text-sub);
  font-size:16px;
  line-height:1.8;
}
.bottom-cta .cta-actions{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:14px;
}

/* footer ---------------------------------------------------- */
.site-footer{
  background:#040914;
  border-top:1px solid rgba(140,210,255,.08);
  padding-top:64px;
  position:relative;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.2fr repeat(2,1fr);
  gap:46px;
  padding-bottom:44px;
}
.footer-brand .brand{margin-bottom:18px}
.footer-desc{
  color:var(--text-sub);
  font-size:14px;
  line-height:1.9;
  max-width:330px;
}
.footer-col h4{
  font-size:16px;
  font-weight:600;
  margin-bottom:18px;
  position:relative;
  padding-bottom:8px;
}
.footer-col h4::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:24px;
  height:2px;
  background:var(--accent);
  border-radius:2px;
}
.footer-col a{
  display:block;
  color:var(--text-sub);
  padding:6px 0;
  font-size:14px;
  transition:color .2s,padding-left .2s;
}
.footer-col a:hover{
  color:var(--accent);
  padding-left:5px;
}
.footer-bottom{
  border-top:1px solid rgba(140,210,255,.08);
  padding:22px 0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  color:var(--text-dim);
  font-size:13px;
}
.footer-mini-link{
  display:flex;
  gap:18px;
}
.footer-mini-link a{color:var(--text-dim)}
.footer-mini-link a:hover{color:var(--accent)}

/* back top ------------------------------------------------- */
.back-top{
  position:fixed;
  right:22px;
  bottom:36px;
  width:44px;
  height:44px;
  border-radius:50%;
  border:1px solid rgba(52,223,245,.3);
  background:rgba(13,27,51,.9);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  color:var(--accent);
  font-size:20px;
  cursor:pointer;
  display:none;
  align-items:center;
  justify-content:center;
  z-index:90;
  box-shadow:0 0 18px rgba(52,223,245,.16);
  transition:all .25s;
  opacity:0;
  transform:translateY(10px);
}
.back-top.show{
  display:flex;
  opacity:1;
  transform:translateY(0);
}
.back-top:hover{
  background:rgba(52,223,245,.16);
  box-shadow:0 0 24px rgba(52,223,245,.28);
}

/* responsive ------------------------------------------------ */
@media (max-width:1180px){
  .main-nav .nav-link{padding:7px 9px;font-size:14px}
  .header-search input{width:120px}
  .trend-chip{font-size:11px}
  .hero-grid{gap:40px}
  .news-list{grid-template-columns:1fr}
  .rating-layout{grid-template-columns:250px 1fr}
}
@media (max-width:1024px){
  .menu-toggle{display:block}
  .main-nav{
    position:fixed;
    top:72px;
    right:0;
    bottom:0;
    width:min(380px,88vw);
    flex-direction:column;
    justify-content:flex-start;
    align-items:stretch;
    gap:4px;
    padding:26px 22px;
    background:rgba(5,12,26,.97);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border-left:1px solid rgba(140,210,255,.14);
    box-shadow:-12px 0 40px rgba(0,0,0,.4);
    transform:translateX(100%);
    transition:transform .32s ease;
    z-index:99;
    overflow-y:auto;
  }
  .main-nav.open{transform:translateX(0)}
  .main-nav .nav-link{
    font-size:16px;
    padding:14px 12px;
    border-radius:12px;
  }
  .main-nav .nav-link.active{
    background:rgba(52,223,245,.08);
    border:1px solid rgba(52,223,245,.14);
  }
  .main-nav .nav-link.active::after{
    display:none;
  }
  .header-right{display:none}
  .section{padding:70px 0}
  :root{--space-section:70px}
  .hero{padding:60px 0 66px}
  .hero-grid{grid-template-columns:1fr;gap:52px}
  .hero-lead{margin-bottom:24px}
  .hero-visual{max-width:580px;margin:0 auto}
  .req-grid{grid-template-columns:1fr}
  .download-panel{grid-template-columns:1fr}
  .rating-layout{grid-template-columns:1fr}
  .review-list{grid-template-columns:1fr}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .section{padding:58px 0}
  :root{--space-section:58px}
  .hero h1{font-size:34px;line-height:1.28}
  .hero-lead{font-size:15px}
  .hero-frame img{aspect-ratio:4/3.4}
  .hero-float-a{right:-4px}
  .hero-float-b{left:-4px}
  .carousel-wrap{grid-template-columns:32px 1fr 32px;gap:8px}
  .feature-card{flex-basis:280px}
  .section-head{margin-bottom:36px}
  .section-head h2{font-size:26px}
  .download-panel{padding:24px 18px}
  .download-btn-grid{grid-template-columns:1fr 1fr}
  .btn-download{min-height:56px}
  .download-qr{grid-column:1/-1}
  .footer-grid{grid-template-columns:1fr;gap:34px;padding-bottom:30px}
  .footer-bottom{flex-direction:column;text-align:center}
  .footer-mini-link{flex-wrap:wrap;justify-content:center}
  .back-top{bottom:22px;right:18px}
}
@media (max-width:520px){
  .brand-name{font-size:17px}
  .hero{padding:44px 0 50px}
  .hero h1{font-size:30px}
  .hero-actions .btn{flex:1}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-safe{font-size:12px}
  .carousel-track{gap:14px}
  .feature-card{flex-basis:260px}
  .download-btn-grid{grid-template-columns:1fr}
  .review-card{padding:16px 18px}
  .faq-item summary{font-size:14px;padding:0 16px}
  .faq-answer{margin-left:16px;padding-right:12px}
  .req-card{padding:22px 16px 6px}
  .req-row{grid-template-columns:28px 1fr auto;gap:8px}
}
:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:3px;
  border-radius:4px;
}

/* roulang page: category1 */
:root{
  --bg:#050C1A;
  --bg-2:#0A1528;
  --panel:rgba(13,26,48,.72);
  --panel-solid:#0D1B33;
  --line:rgba(140,210,255,.18);
  --line-soft:rgba(120,220,255,.10);
  --main:#34DFF5;
  --main-soft:rgba(52,223,245,.18);
  --aux:#7A7CFF;
  --success:#52D9A8;
  --warning:#FF9E6D;
  --star:#FFC46B;
  --text:#E8F2FF;
  --text-2:#A8BBD4;
  --text-3:#6C84A6;
  --radius-lg:20px;
  --radius:16px;
  --radius-sm:10px;
  --shadow-soft:0 12px 40px rgba(2,12,28,.32);
  --shadow-hover:0 20px 50px rgba(0,0,0,.38);
  --container:1200px;
  --space:100px;
  --font:'PingFang SC','Microsoft YaHei UI','Noto Sans SC','Microsoft YaHei',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:
    radial-gradient(900px 500px at 80% -80px, rgba(52,223,245,.08), transparent 60%),
    radial-gradient(700px 480px at -60px 40%, rgba(122,124,255,.10), transparent 55%),
    var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.8;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:radial-gradient(rgba(120,220,255,.045) 1px, transparent 1px);
  background-size:40px 40px;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button,input{font-family:inherit;font-size:inherit}
.wrap{position:relative;z-index:1}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:84px 0}
.section-tight{padding:48px 0}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:38px;
}
.section-title{
  font-size:32px;
  font-weight:600;
  line-height:1.3;
  padding-left:16px;
  position:relative;
}
.section-title::before{
  content:"";
  position:absolute;
  left:0;top:8px;bottom:8px;
  width:4px;
  border-radius:99px;
  background:linear-gradient(180deg,var(--main),var(--aux));
  box-shadow:0 0 14px rgba(52,223,245,.6);
}
.section-sub{color:var(--text-2);font-size:16px;max-width:640px;margin-top:8px}
.more-link{color:var(--main);font-size:14px;display:inline-flex;align-items:center;gap:6px;white-space:nowrap;transition:.25s}
.more-link i{transition:transform .25s}
.more-link:hover{color:#bfeffb}
.more-link:hover i{transform:translateX(4px)}
/* Header */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(5,12,26,.88);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line-soft);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:22px;
  min-height:68px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:38px;height:38px;
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:700;color:#04101f;
  background:linear-gradient(135deg,#4ae6f8,#8e8cff);
  box-shadow:0 0 18px rgba(52,223,245,.42);
}
.brand-name{
  font-size:20px;font-weight:600;letter-spacing:.5px;
  color:var(--text);
  line-height:1.15;
}
.brand-name small{
  display:block;
  font-size:9px;font-weight:500;letter-spacing:2.1px;
  color:var(--text-3);
}
.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:10px;
  flex:1;
}
.nav-link{
  position:relative;
  padding:10px 15px;
  color:var(--text-2);
  font-size:15px;
  border-radius:var(--radius-sm);
  transition:.25s;
  text-align:center;
  white-space:nowrap;
}
.nav-link:hover{color:var(--text)}
.nav-link::after{
  content:"";
  position:absolute;
  left:16px;right:16px;bottom:4px;
  height:2px;
  border-radius:4px;
  background:var(--main);
  box-shadow:0 0 12px var(--main);
  opacity:0;
  transform:scaleX(.4);
  transition:.25s;
}
.nav-link:hover::after,.nav-link.active::after{opacity:1;transform:scaleX(1)}
.nav-link.active{color:var(--text)}
.header-right{
  display:flex;
  align-items:center;
  gap:14px;
  margin-left:auto;
}
.header-search{
  display:flex;
  align-items:center;
  border:1px solid var(--line);
  border-radius:99px;
  background:rgba(10,22,41,.75);
  overflow:hidden;
  transition:.3s;
}
.header-search:focus-within{
  border-color:var(--main);
  box-shadow:0 0 0 3px rgba(52,223,245,.13);
}
.header-search input{
  border:none;
  background:transparent;
  color:var(--text);
  padding:8px 14px;
  width:172px;
  outline:none;
  font-size:14px;
}
.header-search input::placeholder{color:var(--text-3)}
.header-search button{
  border:none;
  background:transparent;
  color:var(--main);
  padding:0 12px;
  font-size:22px;
  cursor:pointer;
  line-height:1;
  transition:.25s;
}
.header-search button:hover{color:#fff}
.trend-wrap{display:flex;align-items:center;gap:6px}
.trend-label{font-size:12px;color:var(--text-3);margin-right:2px}
.trend-chip{
  font-size:12px;
  color:var(--text-2);
  border:1px solid var(--line);
  border-radius:99px;
  padding:3px 10px;
  transition:.25s;
}
.trend-chip:hover{
  color:var(--main);
  border-color:rgba(52,223,245,.6);
}
.menu-toggle{
  display:none;
  border:none;
  flex-direction:column;
  width:42px;height:40px;
  background:rgba(14,30,55,.7);
  border:1px solid var(--line);
  justify-content:center;
  align-items:center;
  gap:5px;
  border-radius:10px;
  cursor:pointer;
}
.menu-toggle span{
  width:20px;height:2px;
  background:var(--text);
  border-radius:6px;
  transition:.3s;
}
.menu-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle.open span:nth-child(2){opacity:0}
.menu-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  gap:8px;
  min-height:46px;
  border-radius:12px;
  padding:10px 24px;
  font-size:16px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:all .25s ease;
  outline:none;
}
.btn-primary{
  background:linear-gradient(135deg,rgba(52,223,245,.95),rgba(61,143,247,.9));
  color:#03101e;
  box-shadow:0 0 12px rgba(52,223,245,.3),0 0 26px rgba(52,223,245,.18);
}
.btn-primary:hover{
  color:#03101e;
  transform:translateY(-2px);
  box-shadow:0 0 22px rgba(52,223,245,.5),0 6px 18px rgba(0,0,0,.24);
}
.btn-primary:active{
  transform:translateY(0);
  box-shadow:0 0 8px rgba(52,223,245,.36);
}
.btn-ghost{
  border-color:rgba(140,210,255,.3);
  color:var(--text);
  background:rgba(12,28,52,.5);
}
.btn-ghost:hover{
  color:var(--main);
  border-color:rgba(52,223,245,.6);
  background:rgba(52,223,245,.08);
}
.btn-ghost:active{
  color:var(--text);
  transform:translateY(1px);
}
.btn i{font-size:17px}
/* Hero category */
.category-hero{
  position:relative;
  padding:92px 0 90px;
  overflow:hidden;
}
.category-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(90deg,rgba(5,12,26,.91),rgba(5,12,26,.68) 42%,rgba(5,12,26,.38));
  z-index:1;
}
.category-hero>.container{position:relative;z-index:2}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:#d6fbff;
  border:1px solid rgba(52,223,245,.4);
  background:rgba(52,223,245,.08);
  border-radius:99px;
  padding:6px 14px;
  margin-bottom:20px;
}
.hero-eyebrow i{color:var(--main);font-size:11px}
.category-hero h1{
  font-size:clamp(38px,5vw,58px);
  font-weight:700;
  line-height:1.18;
  margin-bottom:18px;
  letter-spacing:.5px;
}
.hero-sub{
  max-width:650px;
  color:#c6d7ec;
  font-size:18px;
  line-height:1.8;
  margin-bottom:28px;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:28px;
}
.hero-meta span{
  display:inline-flex;align-items:center;
  gap:7px;
  font-size:13px;
  color:var(--text-2);
  border:1px solid rgba(140,210,255,.15);
  background:rgba(13,27,51,.5);
  padding:7px 14px;
  border-radius:99px;
}
.hero-meta i{color:var(--success);font-size:12px}
/* Channel card */
.channel-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.channel-card{
  position:relative;
  background:var(--panel);
  backdrop-filter:blur(12px);
  border:1px solid var(--line);
  border-top-color:rgba(160,220,255,.28);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-soft);
  transition:.3s;
}
.channel-card:hover{
  transform:translateY(-5px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(52,223,245,.38);
}
.channel-top{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  min-height:250px;
}
.channel-body{padding:28px 28px 22px;display:flex;flex-direction:column;justify-content:center}
.channel-tag{
  font-size:12px;
  display:inline-flex;align-items:center;
  width:max-content;
  padding:4px 12px;
  border-radius:99px;
  background:rgba(122,124,255,.15);
  color:#c3c4ff;
  border:1px solid rgba(122,124,255,.25);
  margin-bottom:12px;
}
.channel-tag.green{background:rgba(82,217,168,.12);color:#a3eccb;border-color:rgba(82,217,168,.3)}
.channel-body h3{font-size:23px;font-weight:600;margin-bottom:8px}
.channel-body h3 i{margin-right:8px;color:var(--main)}
.channel-body p{color:var(--text-2);font-size:15px;line-height:1.8;margin-bottom:14px}
.chip-row{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:18px}
.chip{
  font-size:12px;
  color:var(--text-2);
  border:1px solid var(--line);
  background:rgba(5,12,26,.35);
  border-radius:99px;
  padding:2px 10px;
}
.channel-bottom{padding:0 28px 24px}
.channel-img{
  position:relative;
  min-height:250px;
  overflow:hidden;
}
.channel-img img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.channel-img::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(125deg,rgba(5,12,26,.05),rgba(5,12,26,.68));
}
.channel-card:hover .channel-img img{transform:scale(1.06)}
/* Steps */
.step-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  counter-reset:step;
}
.step-card{
  background:linear-gradient(180deg,rgba(13,26,48,.68),rgba(8,18,35,.72));
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:28px 24px;
  position:relative;
  transition:.3s;
}
.step-card:hover{
  border-color:rgba(52,223,245,.45);
  box-shadow:0 16px 40px rgba(0,0,0,.32);
}
.step-num{
  font-size:40px;
  font-weight:700;
  line-height:1;
  color:transparent;
  -webkit-text-stroke:1px rgba(52,223,245,.7);
  margin-bottom:14px;
}
.step-card h3{
  font-size:18px;
  margin-bottom:8px;
  display:flex;
  align-items:center;
  gap:6px;
}
.step-card h3 i{color:var(--main)}
.step-card p{color:var(--text-2);font-size:14px;line-height:1.9}
/* Spec section */
.platform-wrap{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.spec-block{
  background:rgba(9,20,39,.85);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
}
.spec-head{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;
  padding:20px 24px;
  background:rgba(10,25,47,.55);
  border-bottom:1px solid var(--line-soft);
}
.spec-head .platform-title{font-size:18px;font-weight:600}
.spec-head .platform-title i{color:var(--main);margin-right:8px}
.spec-status{
  font-size:12px;
  color:#0e3a2f;
  background:var(--success);
  padding:4px 10px;
  border-radius:99px;
  white-space:nowrap;
}
.spec-list{padding:8px 4px}
.spec-item{
  display:flex;
  align-items:center;
  padding:12px 22px;
  gap:14px;
}
.spec-item i{
  width:34px;height:34px;
  border-radius:10px;
  background:rgba(52,223,245,.1);
  color:var(--main);
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;
  font-size:14px;
}
.spec-item .spec-icon{
  background:rgba(122,124,255,.12);
  color:var(--aux);
}
.spec-item .label{width:120px;font-size:14px;color:var(--text-3);flex-shrink:0}
.spec-item .value{font-size:15px;color:var(--text);flex:1}
.spec-item .value small{color:var(--text-3);font-size:12px;margin-left:8px}
/* Guide info */
.guide-note{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  margin-top:28px;
}
.guide-note li{
  display:flex;
  gap:12px;
  background:rgba(13,26,48,.42);
  border-radius:var(--radius);
  border:1px solid rgba(140,210,255,.1);
  padding:23px 20px;
}
.guide-note i{
  font-size:23px;
  color:var(--aux);
  margin-top:4px;
}
.guide-note strong{font-size:15px;display:block;margin-bottom:5px}
.guide-note p{font-size:13px;color:var(--text-2)}
/* wall list */
.download-card{
  display:grid;
  grid-template-columns:140px 1fr auto;
  align-items:center;
  background:rgba(10,21,42,.66);
  border:1px solid rgba(140,210,255,.12);
  border-radius:var(--radius);
  margin-bottom:14px;
  padding:14px 18px;
  gap:18px;
  transition:.3s;
}
.download-card:hover{border-color:rgba(52,223,245,.45);background:rgba(12,27,52,.9)}
.download-card-thumb{
  width:140px;height:82px;
  border-radius:10px;
  overflow:hidden;
}
.download-card-thumb img{width:100%;height:100%;object-fit:cover}
.download-info h3{font-size:17px;font-weight:600;margin-bottom:3px}
.download-info .meta{font-size:13px;color:var(--text-3)}
.download-info .meta .date{color:var(--main);margin-right:10px}
.download-card .btn{
  min-height:38px;
  padding:5px 16px;
  font-size:14px;
}
/* Faq */
.faq-wrap{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
  align-items:start;
}
.faq-item{
  background:rgba(13,26,48,.55);
  border:1px solid rgba(140,210,255,.12);
  border-radius:var(--radius);
  padding:0 22px;
  transition:.3s;
}
.faq-item.current{
  border-color:rgba(52,223,245,.4);
  box-shadow:0 0 0 1px rgba(52,223,245,.16), 0 12px 30px rgba(0,0,0,.2);
}
.faq-question{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  width:100%;
  min-height:60px;
  background:transparent;
  color:var(--text);
  border:none;
  outline:none;
  font-size:15px;
  font-weight:500;
  cursor:pointer;
  text-align:left;
}
.faq-question .q-icon{
  font-size:18px;
  flex-shrink:0;
  color:var(--main);
  transition:transform .35s;
  width:22px;height:22px;
  display:flex;align-items:center;justify-content:center;
}
.faq-item.current .faq-question .q-icon{transform:rotate(180deg)}
.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height .4s ease,padding .3s;
  color:var(--text-2);
  font-size:14px;
  line-height:1.9;
}
.faq-item.current .faq-answer{
  max-height:260px;
  padding-bottom:18px;
  border-left:3px solid var(--main);
  border-radius:0 0 0 4px;
  padding-left:14px;
}
/* CTA */
.cta-panel{
  position:relative;
  overflow:hidden;
  background:var(--bg-2);
  border:1px solid rgba(52,223,245,.2);
  border-radius:var(--radius-lg);
  padding:56px 60px;
  text-align:center;
}
.cta-panel::after{
  content:"";
  position:absolute;
  right:-180px;top:-180px;
  width:400px;height:400px;
  background:radial-gradient(circle,rgba(122,124,255,.22),transparent 68%);
  pointer-events:none;
}
.cta-panel::before{
  content:"";
  position:absolute;
  left:-170px;bottom:-200px;
  width:390px;height:390px;
  background:radial-gradient(circle,rgba(52,223,245,.18),transparent 65%);
  pointer-events:none;
}
.cta-panel>*{position:relative;z-index:1}
.cta-panel h2{
  font-size:38px;
  line-height:1.3;
  font-weight:600;
  margin-bottom:18px;
}
.cta-panel h2 span{
  color:var(--main);
  text-shadow:0 0 24px rgba(52,223,245,.42);
}
.cta-panel p{
  color:var(--text-2);
  max-width:620px;
  margin:0 auto 28px;
  font-size:16px;
}
.cta-actions{
  display:flex;justify-content:center;align-items:center;
  gap:16px;flex-wrap:wrap;
}
/* Footer */
.site-footer{
  position:relative;
  background:rgba(5,12,26,.95);
  border-top:1px solid var(--line-soft);
  margin-top:80px;
}
.site-footer::before{
  content:"";
  position:absolute;
  left:50%;top:-1px;
  transform:translateX(-50%);
  width:60%;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(52,223,245,.7),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:30px;padding:52px 0 32px}
.footer-brand .brand-name{color:#eef5ff}
.footer-desc{color:var(--text-3);font-size:14px;margin-top:16px;line-height:1.9;max-width:330px}
.footer-col h4{color:var(--text);font-size:15px;margin-bottom:16px;font-weight:600}
.footer-col a{
  display:block;
  color:var(--text-3);
  font-size:13px;
  padding:6px 0;
  width:max-content;
  transition:.25s;
}
.footer-col a:hover{color:var(--main);transform:translateX(4px)}
.footer-bottom{
  display:flex;justify-content:space-between;justify-items:center;
  align-items:center;
  gap:16px;
  border-top:1px solid rgba(140,210,255,.08);
  padding:20px 0 22px;
  color:var(--text-3);
  font-size:13px;
  flex-wrap:wrap;
}
.footer-mini-link{display:flex;gap:14px}
.footer-mini-link a:hover{color:var(--main)}
/* back to top */
.top-trigger{
  position:fixed;
  right:22px;
  bottom:30px;
  z-index:90;
  width:42px;height:42px;
  border-radius:13px;
  background:var(--panel-solid);
  border:1px solid rgba(52,223,245,.3);
  color:var(--main);
  font-size:18px;
  cursor:pointer;
  transition:.3s;
  opacity:0;
  pointer-events:none;
}
.top-trigger.show{opacity:1;pointer-events:auto}
.top-trigger:hover{background:rgba(52,223,245,.12);transform:translateY(-2px)}
/* Mobile nav search */
.mobile-search{display:none}
/* responsive */
@media(max-width:1100px){
  .main-nav{display:none}
  .menu-toggle{display:flex}
  .main-nav.open{
    display:flex;
    flex-direction:column;
    position:absolute;
    top:68px;
    left:0;right:0;
    background:rgba(5,12,26,.98);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
    padding:20px 24px 16px;
    gap:16px;
    box-shadow:0 18px 38px rgba(0,0,0,.45);
  }
  .main-nav.open .nav-link{padding:12px 0;width:100%;text-align:left;border-bottom:1px solid rgba(140,210,255,.06)}
  .main-nav.open .nav-link::after{display:none}
  .header-right .header-search,.trend-wrap{display:none}
  .mobile-search{display:flex}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:900px){
  .section{padding:60px 0}
  .channel-top{grid-template-columns:1fr}
  .channel-img{min-height:90px}
  .channel-img{display:none}
  .section-head{flex-direction:column;align-items:flex-start}
  .step-grid,.guide-note{grid-template-columns:1fr}
  .platform-wrap{grid-template-columns:1fr}
  .faq-wrap{grid-template-columns:1fr}
}
@media(max-width:640px){
  .container{padding:0 18px}
  .section-tight{padding:30px 0}
  .category-hero{padding:60px 0 60px}
  .hero-sub{font-size:16px}
  .channel-grid{grid-template-columns:1fr}
  .section-title{font-size:25px}
  .cta-panel{padding:40px 24px}
  .cta-panel h2{font-size:27px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{font-size:12px;justify-content:center}
  .download-card{grid-template-columns:1fr;gap:14px}
  .download-card-thumb{width:100%;height:110px}
  .download-card .btn{width:100%}
}

/* roulang page: article */
:root{
--bg:#050C1A;
--bg2:#0A1528;
--bg3:#0D1B33;
--panel:rgba(13,26,48,.72);
--line:rgba(140,210,255,.18);
--line-soft:rgba(140,210,255,.09);
--cyan:#34DFF5;
--violet:#7A7CFF;
--green:#52D9A8;
--yellow:#FFC46B;
--orange:#FF9E6D;
--text:#E8F2FF;
--text2:#A8BBD4;
--text3:#6C84A6;
--r-lg:20px;
--r-md:16px;
--r-sm:10px;
--shadow-lg:0 20px 50px rgba(0,0,0,.32);
--shadow-cyan:0 0 18px rgba(52,223,245,.22),0 8px 24px rgba(0,0,0,.24);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
background:var(--bg);
color:var(--text);
font-family:"Rajdhani","PingFang SC","Microsoft YaHei UI","Noto Sans SC","Microsoft YaHei",sans-serif;
font-size:16px;
line-height:1.8;
-webkit-font-smoothing:antialiased;
}
body::before{
content:"";
position:fixed;
inset:0;
z-index:-1;
pointer-events:none;
background-image:radial-gradient(rgba(120,220,255,.055) 1px,transparent 1px);
background-size:40px 40px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
ul,ol{list-style:none}
.container{width:min(1200px,92%);margin:0 auto}
.section-pad{padding:86px 0}
h1,h2,h3,h4{font-weight:600;line-height:1.35;color:var(--text)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
::selection{background:rgba(52,223,245,.25);color:#fff}

/* 按钮 */
.btn{
display:inline-flex;align-items:center;justify-content:center;gap:8px;
border:none;cursor:pointer;font-size:16px;line-height:1;font-weight:600;
border-radius:var(--r-sm);padding:14px 28px;transition:.25s ease;
}
.btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.btn-primary{
background:linear-gradient(135deg,rgba(52,223,245,.18),transparent 120%),#21c9e4;
color:#03101d;box-shadow:0 0 14px rgba(52,223,245,.6),0 6px 18px rgba(0,0,0,.28);
}
.btn-primary:hover{background:#5cebfa;box-shadow:0 0 24px rgba(52,223,245,.8),0 10px 26px rgba(0,0,0,.28);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 10px rgba(52,223,245,.5)}
.btn-ghost{
background:rgba(122,124,255,.08);border:1px solid rgba(122,124,255,.45);color:var(--text);
backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)
}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);box-shadow:0 0 18px rgba(52,223,245,.22);transform:translateY(-2px)}
.btn-ghost:active{transform:none}
.btn-full{width:100%}
.arrow-link{display:inline-flex;align-items:center;gap:6px;color:var(--cyan);font-weight:600;transition:.2s}
.arrow-link:hover{gap:10px;text-shadow:0 0 12px rgba(52,223,245,.35)}
.arrow-link::after{content:"→";font-family:arial,sans-serif}

/* 标签与徽标 */
.chip{
display:inline-flex;align-items:center;padding:5px 13px;border-radius:999px;font-size:13px;
border:1px solid var(--line);background:rgba(13,26,48,.7);color:var(--text2);line-height:1.4
}
.chip.cyan{color:var(--cyan);border-color:rgba(52,223,245,.32)}
.chip.violet{color:#b0c2ff;border-color:rgba(122,124,255,.35)}
.chip-green{color:var(--green);border-color:rgba(82,217,168,.3)}
.badge{
display:inline-block;padding:4px 13px;font-size:13px;border-radius:999px;
background:rgba(52,223,245,.12);color:var(--cyan);border:1px solid rgba(52,223,245,.28);
}
.section-head{display:flex;align-items:flex-end;gap:18px;margin-bottom:36px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,3vw,34px);position:relative;padding-left:16px;letter-spacing:.03em}
.section-head h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.12em;width:5px;border-radius:4px;background:linear-gradient(180deg,var(--cyan),var(--violet));box-shadow:0 0 14px rgba(52,223,245,.45)}
.section-head p{color:var(--text2);font-size:15px;max-width:600px}
.sec-sub{color:var(--text3);margin-bottom:46px}

/* 导航 */
.site-header{
position:relative;
background:rgba(5,12,26,.68);
backdrop-filter:blur(20px);
-webkit-backdrop-filter:blur(20px);
border-bottom:1px solid var(--line-soft);
z-index:100;
}
.header-inner{
min-height:66px;
display:grid;
grid-template-columns:auto 1fr auto;
align-items:center;
gap:22px;
padding:10px 0;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
width:38px;height:38px;border-radius:12px;
background:linear-gradient(135deg,var(--cyan),var(--violet));
color:#05101F;font-weight:800;font-size:19px;
display:grid;place-items:center;
box-shadow:0 0 16px rgba(52,223,245,.4);
}
.brand-name{font-size:20px;font-weight:700;line-height:1.2;color:var(--text);white-space:nowrap;letter-spacing:.04em}
.brand-name small{display:block;font-size:9px;letter-spacing:.38em;color:var(--text3);font-weight:500}
.main-nav{
display:flex;align-items:center;gap:4px;flex-wrap:wrap;overflow:hidden;
}
.main-nav .nav-link{
position:relative;padding:10px 15px;color:var(--text2);font-size:15.5px;
border-radius:8px;transition:.25s;white-space:nowrap;font-weight:500;
}
.main-nav .nav-link::after{
content:"";position:absolute;left:16px;right:16px;bottom:4px;height:2px;
background:linear-gradient(90deg,var(--cyan),var(--violet));
border-radius:2px;opacity:0;transform:scaleX(.2);transform-origin:left;transition:.3s;
}
.main-nav .nav-link:hover{color:var(--text)}
.main-nav .nav-link:hover::after,.main-nav .nav-link.active::after{opacity:1;transform:scaleX(1)}
.main-nav .nav-link.active{color:var(--cyan)}
.header-right{display:flex;align-items:center;gap:14px;justify-content:flex-end}
.header-search{
display:flex;align-items:center;background:rgba(10,21,40,.8);
border:1px solid var(--line-soft);border-radius:12px;padding:0 6px 0 14px;
height:38px;transition:.25s;width:220px;
}
.header-search:focus-within{border-color:rgba(52,223,245,.65);box-shadow:0 0 14px rgba(52,223,245,.13)}
.header-search input{
background:transparent;border:none;outline:none;color:var(--text);
font-size:14px;width:100%;font-family:inherit;
}
.header-search input::placeholder{color:var(--text3)}
.header-search button{
border:none;width:28px;height:28px;border-radius:8px;background:rgba(52,223,245,.14);
color:var(--cyan);font-size:22px;line-height:1;cursor:pointer;transition:.2s;
}
.header-search button:hover{background:var(--cyan);color:#04101d}
.trend-wrap{display:flex;align-items:center;gap:7px}
.trend-label{font-size:12px;color:var(--text3);white-space:nowrap}
.trend-chip{font-size:12px;color:var(--text2);padding:4px 11px;border-radius:999px;border:1px solid var(--line-soft);transition:.2s;background:rgba(122,124,255,.06);white-space:nowrap}
.trend-chip:hover{border-color:var(--violet);color:#c9d5ff}
.menu-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;background:transparent;border:1px solid var(--line);width:42px;height:38px;border-radius:10px;cursor:pointer;align-items:center}
.menu-toggle span{width:18px;height:2px;background:var(--text);border-radius:2px;transition:.3s}
.mobile-search{display:none}

/* 文章头 */
.article-banner{
position:relative;
background:
radial-gradient(700px 300px at 85% 18%,rgba(122,124,255,.18),transparent 65%),
radial-gradient(800px 320px at 12% 80%,rgba(52,223,245,.12),transparent 66%),
linear-gradient(180deg,#0b1930 0%,var(--bg) 100%);
padding:60px 0 34px;
overflow:hidden;
}
.article-banner::before{
content:"";position:absolute;inset:0;opacity:.05;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text3);margin-bottom:24px;position:relative}
.breadcrumb a{color:var(--text3);transition:.2s}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb b{font-weight:400;opacity:.5}
.breadcrumb .cur{color:var(--text2);max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-hero-info{position:relative;max-width:990px}
.article-topline{display:flex;align-items:center;gap:14px;margin-bottom:20px;flex-wrap:wrap}
.cat-bullet{display:inline-flex;align-items:center;gap:8px;color:var(--violet);font-size:14px;letter-spacing:.14em;padding:5px 14px;border-radius:999px;background:rgba(122,124,255,.1);border:1px solid rgba(122,124,255,.3)}
.article-hero-title h1{
font-size:clamp(30px,5vw,48px);font-weight:700;line-height:1.28;color:var(--text);
margin-bottom:18px;letter-spacing:.015em;max-width:1000px
}
.article-meta-line{display:flex;flex-wrap:wrap;gap:8px 22px;color:var(--text2);font-size:14px;align-items:center}
.meta-item{display:inline-flex;align-items:center;gap:7px;color:var(--text2)}
.meta-item svg{width:15px;height:15px;stroke:var(--text3);fill:none;stroke-width:1.9}
.meta-item strong{color:var(--cyan);font-weight:600}
.meta-split{width:1px;height:13px;background:var(--line);margin:0 2px}
.hero-card-note{margin-left:auto;display:inline-flex;align-items:center;gap:7px;color:var(--green);font-size:13px;background:rgba(82,217,168,.07);border:1px solid rgba(82,217,168,.24);padding:5px 13px;border-radius:999px;line-height:1.2}
@media(max-width:767px){.hero-card-note{margin-left:0}}

/* 文章正题 */
.article-layout{
display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:30px;
padding-top:44px;align-items:start;
}
.article-zone{
background:var(--panel);
border:1px solid var(--line-soft);
border-radius:var(--r-lg);
backdrop-filter:blur(14px);
-webkit-backdrop-filter:blur(14px);
box-shadow:0 18px 44px rgba(0,0,0,.24);
padding:clamp(20px,4vw,44px);
}
.cms-body{color:var(--text2);font-size:17px;line-height:1.9}
.cms-body p{margin-bottom:1.5em}
.cms-body h2{
font-size:26px;margin:2em 0 .9em;padding-left:15px;color:var(--text);position:relative
}
.cms-body h2::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:4px;background:linear-gradient(var(--cyan),var(--violet))}
.cms-body h3{font-size:22px;margin:1.8em 0 .8em;color:var(--text)}
.cms-body h4{font-size:18px;margin:1.4em 0 .5em;color:var(--text)}
.cms-body ul,.cms-body ol{margin:0 0 1.6em;padding-left:1.5em;color:var(--text2)}
.cms-body ul{list-style:square}
.cms-body li{padding-left:8px;margin-bottom:.48em}
.cms-body a{color:var(--cyan);border-bottom:1px solid rgba(52,223,245,.4);transition:.2s}
.cms-body a:hover{border-color:var(--cyan);text-shadow:0 0 10px rgba(52,223,245,.2)}
.cms-body blockquote{
margin:1.8em 0;padding:1.2em 1.5em;border-left:4px solid var(--cyan);
background:rgba(52,223,245,.06);border-radius:0 var(--r-md) var(--r-md) 0;
color:var(--text)
}
.cms-body blockquote p:last-child{margin-bottom:0}
.cms-body img{border-radius:var(--r-md);margin:1.6em auto;box-shadow:var(--shadow-lg)}
.cms-body figure{margin:2em 0}
.cms-body figcaption{font-size:13px;color:var(--text3);text-align:center;margin-top:10px}
.cms-body table{width:100%;border-collapse:separate;border-spacing:0;margin:1.8em 0;border-radius:12px;overflow:hidden;border:1px solid var(--line-soft)}
.cms-body th{background:#0e2240;color:var(--text);font-weight:600;padding:12px 16px;text-align:left}
.cms-body td{padding:11px 16px;border-top:1px solid rgba(120,160,200,.1);color:var(--text2)}
.cms-body tr{background:transparent}
.cms-body tr:nth-child(even) td{background:rgba(10,21,40,.45)}
.cms-body hr{border:none;height:1px;background:linear-gradient(90deg,transparent,rgba(52,223,245,.4),transparent);margin:2.4em 0}

/* 侧栏 */
.article-side{display:flex;flex-direction:column;gap:24px;position:sticky;top:86px;transition:top .2s}
.side-card{
background:var(--panel);
border:1px solid var(--line-soft);
border-radius:var(--r-md);
padding:26px;
backdrop-filter:blur(14px);
-webkit-backdrop-filter:blur(14px);
}
.side-card h3{font-size:19px;margin-bottom:16px;padding-bottom:10px;border-bottom:1px solid var(--line-soft);position:relative}
.side-card h3::after{content:"";position:absolute;bottom:-1px;left:0;width:42px;height:2px;background:var(--cyan);border-radius:2px}
.side-card p{color:var(--text2);font-size:14px;line-height:1.9}
.side-desc{margin-bottom:18px}
.down-side-btn{display:flex;flex-direction:column;gap:10px;margin-top:14px}
.side-list li{margin-bottom:13px;padding-left:16px;position:relative;color:var(--text2);font-size:15px}
.side-list li::before{content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px rgba(52,223,245,.6)}
.side-list li a{transition:.2s;color:var(--text2)}
.side-list li a:hover{color:var(--cyan);padding-left:4px}
.hot-item{display:flex;gap:11px;margin-bottom:16px;align-items:flex-start}
.hot-index{font-size:15px;font-weight:700;color:rgba(52,223,245,.5)}
.hot-item .hot-title{font-size:14px;color:var(--text2);line-height:1.5}
.hot-item .hot-title span{display:block;color:var(--text3);font-size:12px}

/* 空态 */
.empty-state{
min-height:360px;display:flex;align-items:center;justify-content:center;text-align:center;flex-direction:column;
}
.empty-code{
font-size:80px;font-weight:800;color:rgba(52,223,245,.2);font-family:sans-serif;line-height:1
}
.empty-state h2{font-size:26px;color:var(--text);margin:18px 0 10px}
.empty-state p{color:var(--text3);max-width:420px;margin-bottom:22px}
.empty-back{display:inline-flex;gap:8px;padding:12px 22px;border-radius:12px;background:linear-gradient(90deg,rgba(52,223,245,.18),rgba(122,124,255,.18));border:1px solid rgba(52,223,245,.4);color:var(--text);font-weight:600;transition:.25s}
.empty-back:hover{border-color:var(--cyan);box-shadow:0 0 18px rgba(52,223,245,.2)}

/* 相关推荐 */
.related-row{
padding:70px 0 30px;
}
.related-grid{
display:grid;grid-template-columns:repeat(3,1fr);gap:24px
}
.rel-card{
background:var(--panel);border:1px solid var(--line-soft);border-radius:var(--r-md);
overflow:hidden;transition:.35s ease;display:flex;flex-direction:column;
}
.rel-card:hover{transform:translateY(-6px);border-color:rgba(52,223,245,.5);box-shadow:var(--shadow-lg)}
.rel-media{height:176px;overflow:hidden;position:relative}
.rel-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.rel-card:hover .rel-media img{transform:scale(1.07)}
.rel-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(5,12,26,.55));opacity:.6}
.rel-cat{position:absolute;left:14px;top:13px;z-index:2;font-size:12px;padding:4px 12px;border-radius:999px;background:rgba(5,15,30,.82);border:1px solid rgba(52,223,245,.4);color:var(--cyan);backdrop-filter:blur(6px)}
.rel-info{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-info h3{font-size:17px;color:var(--text);line-height:1.55;transition:.2s}
.rel-card:hover .rel-info h3{color:var(--cyan)}
.rel-info p{color:var(--text3);font-size:13.5px;line-height:1.7;flex:1}
.rel-meta{display:flex;align-items:center;justify-content:space-between;color:var(--search-tag);color:var(--text3);font-size:12.5px}
.rel-meta .arrow-line{color:var(--violet)}
@media(max-width:1023px){.related-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.related-grid{grid-template-columns:1fr}}

/* 返回条 */
.return-strip{margin:50px 0 10px;padding:30px;border-radius:var(--r-lg);background:linear-gradient(90deg,rgba(52,223,245,.1),rgba(122,124,255,.08));border:1px solid var(--line-soft);display:flex;align-items:center;justify-content:space-between;gap:22px;flex-wrap:wrap}
.return-strip .txt h3{font-size:20px;margin-bottom:4px}
.return-strip .txt p{color:var(--text3);font-size:14.5px}
.return-actions{display:flex;gap:12px;flex-wrap:wrap}

/* CTA区 */
.pre-footer-cta{position:relative;padding:64px 0 50px;overflow:hidden}
.pre-footer-cta .cta-panel{
position:relative;border-radius:28px;overflow:hidden;padding:52px clamp(20px,5vw,60px);
background:
radial-gradient(500px 220px at 85% 20%,rgba(122,124,255,.22),transparent 55%),
radial-gradient(600px 260px at 10% 100%,rgba(52,223,245,.16),transparent 50%),
linear-gradient(130deg,#0b1c3a,#081224);
border:1px solid rgba(140,210,255,.16);
box-shadow:0 24px 70px rgba(0,0,0,.35)
}
.cta-panel h2{font-size:clamp(24px,3.4vw,38px);margin-bottom:8px;letter-spacing:.02em}
.cta-panel p{color:var(--text2);max-width:640px;font-size:16px}
.cta-actions{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}
.cta-notes{margin-top:18px;font-size:12.5px;color:var(--text3);display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.cta-notes i{width:6px;height:6px;background:var(--green);border-radius:50%}

/* 页脚 */
.site-footer{margin-top:10px;background:#060b16;border-top:1px solid var(--line-soft);padding:58px 0 0;position:relative;overflow:hidden}
.site-footer::before{content:"";position:absolute;left:20%;right:20%;top:-120px;height:240px;background:radial-gradient(closest-side,rgba(52,223,245,.1),transparent);pointer-events:none}
.footer-grid{display:grid;grid-template-columns:1.2fr .9fr .9fr;gap:48px;padding-bottom:42px}
.footer-brand .brand-name{font-size:22px}
.footer-brand .brand-name small{letter-spacing:.3em;color:var(--text3)}
.footer-desc{color:var(--text3);font-size:14px;line-height:1.9;max-width:380px;margin-top:16px}
.footer-col h4{font-size:15px;color:#8fdaff;margin-bottom:15px;letter-spacing:.04em}
.footer-col a{display:block;color:var(--text3);padding:7px 0;font-size:14px;transition:.2s}
.footer-col a:hover{color:var(--cyan);padding-left:6px}
.footer-bottom{border-top:1px solid rgba(120,160,200,.1);padding:20px 0 20px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:var(--text3);font-size:13px}
.footer-mini-link{display:flex;gap:16px;font-size:13px}
.footer-mini-link a{color:var(--text3);transition:.2s}
.footer-mini-link a:hover{color:var(--cyan)}

/* 回顶 */
.back-top-btn{
position:fixed;right:20px;bottom:26px;z-index:80;width:44px;height:44px;border-radius:50%;
background:rgba(13,27,51,.9);border:1px solid rgba(52,223,245,.5);color:var(--cyan);
font-size:20px;cursor:pointer;display:none;align-items:center;justify-content:center;
box-shadow:0 0 16px rgba(52,223,245,.18);transition:.25s;
}
.back-top-btn.show{display:flex}
.back-top-btn:hover{background:#08243a;transform:translateY(-4px);box-shadow:0 6px 20px rgba(52,223,245,.28)}

/* 响应式 */
@media(max-width:1199px){
.header-right .header-search{width:170px}
.header-right{flex-wrap:wrap}
}
@media(max-width:1060px){
.header-right{display:none}
.mobile-search{display:block!important}
.header-inner{grid-template-columns:auto 1fr auto}
.menu-toggle{display:flex}
.main-nav{
position:fixed;top:0;right:0;height:100vh;width:min(380px,88vw);background:rgba(4,9,20,.96);
backdrop-filter:blur(28px);-webkit-backdrop-filter:blur(28px);
flex-direction:column;align-items:stretch;padding:88px 24px 30px;border-left:1px solid var(--line-soft);
transform:translateX(105%);transition:transform .35s ease;z-index:200;overflow-y:auto;
gap:5px;
}
.main-nav.open{transform:none}
.main-nav .nav-link{padding:13px 14px;font-size:17px;border-bottom:1px solid rgba(140,210,255,.06);border-radius:6px;display:block}
.main-nav .nav-link::after{display:none}
.main-nav .nav-link:hover{background:rgba(52,223,245,.06)}
.menu-toggle{position:relative;z-index:229}
body.menu-freeze{overflow:hidden}
.article-layout{grid-template-columns:1fr}
.article-side{position:static;grid-template-columns:1fr;display:grid}
.side-card{padding:23px}
.return-strip{flex-direction:column;align-items:flex-start}
}
@media(max-width:900px){
.footer-grid{grid-template-columns:1fr 1fr}
.section-pad{padding:64px 0}
}
@media(max-width:767px){
.container{width:94%}
.article-banner{padding:42px 0 20px}
.article-zone{padding:18px}
.cms-body{font-size:16px}
.footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:30px}
.article-meta-line{gap:6px 16px}
.hero-card-note{width:100%}
.return-actions{width:100%}
.return-actions .btn{flex:1}
.pre-footer-cta .cta-panel{padding:38px 22px}
}
@media(max-width:420px){
.breadcrumb .cur{max-width:120px}
.article-hero-title h1{font-size:27px;line-height:1.38}
.header-search button{width:26px}
.brand-name{font-size:18px}
.brand-mark{width:34px;height:34px}
.footer-mini-link{flex-wrap:wrap;row-gap:4px}
.back-top-btn{bottom:16px;right:13px;width:40px;height:40px}
}

/* roulang page: category2 */
:root{
  --bg:#050C1A;
  --bg2:#0A1528;
  --panel:rgba(13,26,48,.72);
  --panel-deep:#0D1B33;
  --line:rgba(140,210,255,.16);
  --line-strong:rgba(52,223,245,.45);
  --primary:#34DFF5;
  --secondary:#7A7CFF;
  --text:#E8F2FF;
  --muted:#A8BBD4;
  --weak:#6C84A6;
  --success:#52D9A8;
  --warn:#FFC46B;
  --danger:#FF9E6D;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --shadow-primary:0 0 12px rgba(52,223,245,.22),0 0 24px rgba(52,223,245,.16);
  --shadow-hover:0 20px 50px rgba(0,0,0,.32);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:
    linear-gradient(rgba(120,220,255,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,220,255,.03) 1px,transparent 1px),
    var(--bg);
  background-size:40px 40px,40px 40px,100% 100%;
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei UI","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
  color-scheme:dark;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit}
button{cursor:pointer}
ul,ol,dl,p,h1,h2,h3,h4,figure{margin:0}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
  border-radius:6px;
  box-shadow:0 0 0 4px rgba(52,223,245,.14);
}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-head{margin-bottom:42px;max-width:820px}
.section-head h2{
  font-size:32px;
  line-height:1.3;
  font-weight:600;
  margin:0 0 12px;
  padding-left:16px;
  position:relative;
}
.section-head h2::before{
  content:"";
  position:absolute;
  left:0;top:.16em;bottom:.16em;
  width:4px;border-radius:4px;
  background:linear-gradient(180deg,var(--primary),var(--secondary));
  box-shadow:0 0 12px rgba(52,223,245,.35);
}
.section-head p{color:var(--muted);font-size:16px;line-height:1.9;margin:0}

.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(5,12,26,.84);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
@supports not (backdrop-filter:blur(16px)){
  .site-header{background:rgba(5,12,26,.97)}
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;text-decoration:none;color:var(--text)}
.brand-mark{
  width:38px;height:38px;border-radius:10px;flex-shrink:0;
  display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(52,223,245,.9),rgba(122,124,255,.92));
  color:#01131d;font-weight:800;font-size:20px;
  box-shadow:0 0 16px rgba(52,223,245,.28);
}
.brand-name{
  display:flex;flex-direction:column;line-height:1.15;
  font-size:19px;font-weight:700;letter-spacing:.2px;white-space:nowrap;
}
.brand-name small{
  font-size:9px;font-weight:500;letter-spacing:2.4px;
  color:var(--weak);margin-top:3px;
}
.main-nav{display:flex;align-items:center;gap:0}
.nav-link{
  display:flex;align-items:center;padding:0 13px;
  height:64px;color:var(--muted);font-size:15px;font-weight:500;
  position:relative;white-space:nowrap;transition:color .25s ease,background .25s ease;
}
.nav-link:hover{color:var(--text)}
.nav-link.active{color:var(--text)}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:10px;height:2px;
  border-radius:2px;background:var(--primary);
  box-shadow:0 0 10px rgba(52,223,245,.8);
}
.header-right{display:flex;align-items:center;gap:12px;flex-shrink:0}
.header-search{display:flex;align-items:center;background:rgba(10,22,42,.86);border:1px solid var(--line);border-radius:999px;padding:2px;transition:border-color .2s,box-shadow .2s}
.header-search input{background:transparent;border:0;outline:0;color:var(--text);padding:8px 4px 8px 14px;width:148px;font-size:14px}
.header-search input::placeholder{color:var(--weak)}
.header-search button{
  width:32px;height:32px;border-radius:50%;border:0;
  background:var(--primary);color:#02131b;font-size:20px;line-height:1;
  display:grid;place-items:center;transition:box-shadow .2s,transform .2s;
}
.header-search button:hover{box-shadow:0 0 12px rgba(52,223,245,.4);transform:scale(1.05)}
.trend-wrap{display:flex;align-items:center;gap:6px}
.trend-label{font-size:11px;color:var(--weak);font-weight:500;white-space:nowrap}
.trend-chip{
  padding:5px 10px;border-radius:999px;font-size:12px;color:var(--muted);
  border:1px solid rgba(122,124,255,.18);background:rgba(122,124,255,.08);
  transition:all .2s ease;
}
.trend-chip:hover{color:var(--text);border-color:rgba(122,124,255,.5);background:rgba(122,124,255,.16)}
.menu-toggle{display:none;flex-direction:column;gap:5px;width:42px;height:42px;align-items:center;justify-content:center;background:rgba(10,22,42,.9);border:1px solid var(--line);border-radius:10px;padding:0}
.menu-toggle span{width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .3s,opacity .3s}
.mobile-search{display:none}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:999;background:var(--panel-deep);
  color:var(--text);padding:8px 16px;border-radius:0 0 12px 0;
}
.skip-link:focus{left:0}

.page-hero{
  position:relative;padding:112px 0 104px;overflow:hidden;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom:1px solid rgba(140,210,255,.14);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(ellipse at 18% 25%,rgba(52,223,245,.16),transparent 48%),
    radial-gradient(ellipse at 86% 15%,rgba(122,124,255,.14),transparent 42%),
    linear-gradient(180deg,rgba(5,12,26,.78) 0%,rgba(5,12,26,.72) 48%,rgba(5,12,26,.96) 100%);
  pointer-events:none;
}
.page-hero .hero-inner{position:relative;z-index:2}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--weak);margin-bottom:24px}
.crumbs a{color:var(--weak);transition:color .2s}
.crumbs a:hover{color:var(--primary)}
.crumbs span:last-child{color:var(--muted)}
.hero-kicker{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;margin-bottom:22px;
  background:rgba(9,20,38,.68);border:1px solid rgba(52,223,245,.22);
  color:var(--muted);font-size:13px;
}
.hero-kicker i{width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 8px rgba(82,217,168,.8)}
.page-hero h1{
  font-size:clamp(36px,5vw,60px);line-height:1.18;font-weight:700;margin:0 0 20px;
  color:var(--text);text-shadow:0 2px 20px rgba(0,0,0,.3);
}
.hero-lead{
  max-width:720px;font-size:17px;line-height:2;color:var(--muted);
  margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:10px;padding:12px 26px;font-weight:600;font-size:15px;
  border:1px solid transparent;transition:transform .25s,box-shadow .25s,background .25s,border-color .25s;
  min-height:46px;
}
.btn-primary{
  background:var(--primary);color:#02131b;
  box-shadow:0 0 14px rgba(52,223,245,.3),0 0 26px rgba(52,223,245,.18);
}
.btn-primary:hover{box-shadow:0 0 18px rgba(52,223,245,.42),0 0 34px rgba(52,223,245,.24);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 10px rgba(52,223,245,.2)}
.btn-ghost{
  background:rgba(13,27,52,.7);border-color:rgba(122,124,255,.42);color:var(--text);
}
.btn-ghost:hover{border-color:var(--secondary);box-shadow:0 0 14px rgba(122,124,255,.2);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-lg{padding:16px 34px;font-size:17px;min-height:54px;border-radius:12px}
.hero-note{margin-top:18px;font-size:12px;color:var(--weak)}

.filter-section{
  background:linear-gradient(180deg,rgba(10,21,40,.3),transparent 180px);
}
.filter-panel{
  background:rgba(9,20,40,.62);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:30px;
}
.filter-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.filter-btn{
  height:38px;padding:0 18px;border-radius:999px;
  border:1px solid rgba(140,210,255,.16);background:rgba(10,21,40,.6);
  color:var(--muted);font-size:14px;font-weight:500;transition:all .25s ease;
}
.filter-btn:hover{color:var(--text);border-color:rgba(52,223,245,.45)}
.filter-btn.active{
  background:linear-gradient(135deg,rgba(52,223,245,.16),rgba(122,124,255,.16));
  border-color:var(--line-strong);color:var(--primary);
  box-shadow:0 0 12px rgba(52,223,245,.16);
}
.prize-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.prize-card{
  display:flex;flex-direction:column;background:linear-gradient(180deg,rgba(13,27,52,.76),rgba(8,17,34,.62));
  border:1px solid rgba(140,210,255,.14);border-radius:var(--r-md);overflow:hidden;
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.prize-card:hover{transform:translateY(-5px);border-color:rgba(52,223,245,.32);box-shadow:var(--shadow-hover)}
.prize-card .card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#081226}
.prize-card .card-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.prize-card:hover .card-media img{transform:scale(1.05)}
.card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 46%,rgba(5,12,26,.72));pointer-events:none}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:500;background:rgba(6,16,32,.82);border:1px solid rgba(140,210,255,.24);
}
.badge.hot{background:rgba(122,124,255,.26);border-color:rgba(122,124,255,.5);color:#E4E6FF}
.badge.limited{background:rgba(255,158,109,.18);border-color:rgba(255,158,109,.38);color:#FFC7A6}
.badge.new{background:rgba(52,223,245,.16);border-color:rgba(52,223,245,.42);color:var(--primary)}
.badge-end{background:rgba(255,196,107,.16);border-color:rgba(255,196,107,.38);color:var(--warn)}
.card-badge{position:absolute;left:14px;top:14px;z-index:2;display:inline-flex;gap:6px}
.time-flag{
  position:absolute;right:12px;bottom:12px;z-index:2;
  font-size:12px;padding:4px 10px;border-radius:999px;color:var(--muted);
  background:rgba(5,12,26,.76);border:1px solid rgba(140,210,255,.18);
}
.card-body{padding:22px 22px 20px;display:flex;flex-direction:column;flex:1}
.card-tag{
  align-self:flex-start;display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:999px;
  font-size:12px;background:rgba(122,124,255,.12);color:#C7C9FF;border:1px solid rgba(122,124,255,.2);margin-bottom:12px;
}
.card-body h3{font-size:19px;line-height:1.45;font-weight:600;margin-bottom:10px;color:var(--text)}
.card-body h3 a{transition:color .2s}
.card-body h3 a:hover{color:var(--primary)}
.card-desc{font-size:14px;line-height:1.85;color:var(--muted);margin-bottom:16px}
.meta-list{list-style:none;padding:0;margin:0 0 18px;display:flex;flex-direction:column;gap:6px;border-top:1px solid rgba(140,210,255,.08);padding-top:14px}
.meta-list li{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--weak)}
.meta-list li b{font-weight:500;color:var(--muted)}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px}
.text-link{color:var(--primary);font-size:14px;font-weight:500;transition:color .2s,opacity .2s;position:relative}
.text-link:hover{color:#BFEDFF}
.text-link::after{content:"";position:absolute;left:0;right:100%;bottom:-3px;height:1px;background:var(--primary);transition:right .25s ease}
.text-link:hover::after{right:0}
.state{
  display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:500;
  padding:4px 10px;border-radius:999px;background:rgba(82,217,168,.12);border:1px solid rgba(82,217,168,.28);color:var(--success);
}
.state.warn{background:rgba(255,196,107,.12);border-color:rgba(255,196,107,.3);color:var(--warn)}
.state.inactive{background:rgba(108,132,166,.14);border-color:rgba(108,132,166,.25);color:var(--muted)}
.state i{width:5px;height:5px;border-radius:50%;background:currentColor}

.channel-stats .stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat-card{
  position:relative;overflow:hidden;padding:30px 26px;border-radius:var(--r-md);
  background:linear-gradient(150deg,rgba(13,27,52,.76),rgba(8,16,34,.7));
  border:1px solid rgba(140,210,255,.14);transition:border-color .25s,box-shadow .25s,transform .25s;
}
.stat-card::after{
  content:"";position:absolute;right:-24px;top:-24px;width:86px;height:86px;border-radius:50%;
  background:radial-gradient(circle,rgba(52,223,245,.12),transparent 70%);pointer-events:none;
}
.stat-card:hover{transform:translateY(-4px);border-color:rgba(52,223,245,.3);box-shadow:var(--shadow-hover)}
.stat-num{
  display:block;font-size:26px;font-weight:600;line-height:1.3;letter-spacing:.3px;
  color:var(--primary);font-family:"Rajdhani","Saira","PingFang SC",sans-serif;
}
.stat-label{display:block;margin-top:8px;font-size:14px;color:var(--muted);line-height:1.65}
.stat-sub{display:block;color:var(--weak);font-size:12px;margin-top:2px}

.process-section{background:linear-gradient(180deg,transparent,rgba(10,21,40,.36));}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:step}
.step-card{
  position:relative;padding:34px 28px 30px;border-radius:var(--r-lg);
  background:rgba(10,21,40,.62);border:1px solid rgba(140,210,255,.12);
  transition:border-color .25s,box-shadow .25s,transform .25s;
}
.step-card:hover{border-color:rgba(122,124,255,.3);box-shadow:var(--shadow-hover);transform:translateY(-4px)}
.step-card::before{
  counter-increment:step;content:"0" counter(step);
  display:block;font-size:14px;font-weight:600;color:var(--secondary);
  letter-spacing:1px;margin-bottom:18px;
}
.step-card h3{font-size:20px;font-weight:600;margin-bottom:12px;color:var(--text)}
.step-card p{font-size:14px;color:var(--muted);line-height:1.85}

.rail-scroll{overflow-x:auto;scrollbar-color:rgba(52,223,245,.3) rgba(10,21,40,.8);scrollbar-width:thin;padding-bottom:8px}
.rail-scroll::-webkit-scrollbar{height:8px}
.rail-scroll::-webkit-scrollbar-thumb{background:rgba(52,223,245,.35);border-radius:999px}
.rail-list{display:grid;grid-auto-flow:column;grid-auto-columns:380px;gap:24px}
.rail-card{
  display:grid;grid-template-columns:142px 1fr;min-height:180px;border-radius:20px;overflow:hidden;
  background:linear-gradient(135deg,rgba(13,27,52,.82),rgba(8,17,34,.9));
  border:1px solid rgba(140,210,255,.13);
  transition:border-color .25s,box-shadow .25s,transform .25s;
}
.rail-card:hover{transform:translateY(-4px);border-color:rgba(52,223,245,.3);box-shadow:var(--shadow-hover)}
.rail-media{position:relative;overflow:hidden;min-height:180px}
.rail-media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.rail-media::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 76%,rgba(5,12,26,.8))}
.rail-badge{
  position:absolute;left:10px;top:10px;z-index:2;
  padding:4px 9px;border-radius:999px;font-size:11px;line-height:1;
  color:#DAEFF5;background:rgba(5,16,30,.74);border:1px solid rgba(52,223,245,.3);
}
.rail-body{padding:18px 18px;display:flex;flex-direction:column;justify-content:center;gap:8px}
.rail-body h3{font-size:17px;line-height:1.5;font-weight:600;color:var(--text)}
.rail-body p{font-size:13px;color:var(--muted);line-height:1.75;margin:0}
.rail-meta{font-size:12px;color:var(--weak)}
.rail-card a:hover h3{color:var(--primary)}

.faq-section{background:rgba(6,13,28,.2)}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.faq-item{
  background:rgba(10,21,40,.68);border:1px solid rgba(140,210,255,.12);border-radius:14px;
  overflow:hidden;transition:border-color .25s,background .25s;
}
.faq-item[open]{border-color:rgba(52,223,245,.32);background:rgba(11,24,46,.78)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:58px;padding:14px 18px 14px 22px;font-weight:600;color:var(--text);transition:color .2s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--primary)}
.faq-item summary .q-text{padding-right:28px}
.faq-item summary::after{
  content:"+";flex-shrink:0;width:26px;height:26px;border-radius:50%;font-size:18px;line-height:1;
  display:grid;place-items:center;color:var(--primary);
  background:rgba(52,223,245,.08);border:1px solid rgba(52,223,245,.3);transition:transform .3s,background .25s;
}
.faq-item[open] summary::after{transform:rotate(45deg);background:rgba(52,223,245,.18)}
.faq-item .faq-answer{padding:0 22px 18px;color:var(--muted);font-size:14px;line-height:1.85}
.faq-item .faq-answer a{color:var(--primary)}

.cta-section{padding:40px 0 100px}
.cta-box{
  position:relative;overflow:hidden;border-radius:30px;
  background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  padding:58px;
  border:1px solid rgba(140,210,255,.2);
  display:grid;grid-template-columns:1.35fr .65fr;gap:40px;align-items:center;
}
.cta-box::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(5,12,26,.84) 0%,rgba(5,12,26,.72) 66%,rgba(9,21,43,.68) 100%),
  radial-gradient(ellipse at 82% 36%,rgba(122,124,255,.15),transparent 58%);
  pointer-events:none;
}
.cta-box .cta-content{position:relative;z-index:2}
.cta-box h2{font-size:32px;line-height:1.4;margin-bottom:14px;color:var(--text)}
.cta-box p{max-width:620px;color:var(--muted);line-height:1.9;font-size:15px;margin-bottom:26px}
.cta-btns{display:flex;flex-wrap:wrap;gap:12px}
.btn-download{
  background:rgba(5,16,32,.9);border:1px solid rgba(140,210,255,.3);color:var(--text);
}
.btn-download:hover{border-color:var(--primary);box-shadow:0 0 14px rgba(52,223,245,.2);transform:translateY(-2px)}
.qr-zone{
  position:relative;z-index:2;display:flex;flex-direction:column;gap:12px;align-items:center;
}
.qr-slot{
  width:132px;height:132px;border-radius:18px;background:#F5FAFF;
  position:relative;box-shadow:0 14px 44px rgba(0,0,0,.25);
}
.qr-slot::after{
  content:"扫码";position:absolute;inset:0;display:grid;place-items:center;
  font-size:13px;font-weight:600;color:#6C84A6;letter-spacing:2px;
}
.qr-zone .qr-bottom{color:var(--muted);font-size:13px;text-align:center;line-height:1.6}

.site-footer{
  background:#030911;border-top:1px solid rgba(140,210,255,.1);
  padding-top:64px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr .8fr 1fr;gap:48px;padding-bottom:40px}
.footer-brand .brand{margin-bottom:18px}
.footer-desc{max-width:400px;color:var(--weak);font-size:14px;line-height:1.9;margin:0}
.footer-col h4{color:var(--text);font-size:16px;font-weight:600;margin:0 0 14px}
.footer-col a{
  display:block;color:var(--weak);font-size:14px;padding:7px 0;transition:color .2s,padding-left .2s;
}
.footer-col a:hover{color:var(--primary);padding-left:4px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;
  padding:20px 0;border-top:1px solid rgba(140,210,255,.08);
}
.footer-bottom span, .footer-mini-link a{color:var(--weak);font-size:13px}
.footer-mini-link{display:flex;gap:18px}
.footer-mini-link a{transition:color .2s}
.footer-mini-link a:hover{color:var(--primary)}
.to-top{
  position:fixed;right:22px;bottom:28px;z-index:90;
  width:44px;height:44px;border-radius:12px;border:1px solid rgba(52,223,245,.28);
  background:rgba(10,21,40,.92);color:var(--primary);font-size:20px;line-height:1;
  box-shadow:0 0 14px rgba(52,223,245,.15);
  opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .25s,visibility .25s,transform .25s;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--primary);color:#02131b;box-shadow:0 0 20px rgba(52,223,245,.35)}

@media (max-width:1100px){
  .header-right .trend-wrap{display:none}
  .header-search input{width:116px}
  .prize-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .menu-toggle{display:flex}
  .header-right{display:none}
  .main-nav{
    position:absolute;top:64px;left:0;right:0;
    display:block;max-height:0;overflow:hidden;
    background:rgba(4,10,22,.98);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
    transition:max-height .4s ease,padding .3s ease;
  }
  .main-nav.open{
    max-height:calc(100vh - 64px);overflow-y:auto;
    padding:12px 20px 24px;box-shadow:0 20px 46px rgba(0,0,0,.3);
  }
  .main-nav .nav-link{
    height:auto;display:block;padding:15px 10px;border-radius:10px;
    border-bottom:1px solid rgba(140,210,255,.07);
  }
  .main-nav .nav-link.active{color:var(--primary);padding-left:16px;background:rgba(52,223,245,.04)}
  .main-nav .nav-link.active::after{display:none}
  .mobile-search{display:block}
}
@media (max-width:900px){
  .faq-grid{grid-template-columns:1fr}
  .cta-box{grid-template-columns:1fr;padding:42px}
  .qr-zone{flex-direction:row;justify-content:flex-start;align-items:center;gap:18px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .section{padding:64px 0}
  .page-hero{padding:78px 0 72px}
  .section-head h2{font-size:26px}
  .prize-grid{grid-template-columns:1fr;gap:20px}
  .filter-panel{padding:20px}
  .stat-grid{grid-template-columns:1fr 1fr;gap:14px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .steps-grid{grid-template-columns:1fr}
  .rail-list{grid-auto-columns:minmax(290px,84vw)}
  .rail-card{grid-template-columns:120px 1fr}
  .cta-box h2{font-size:26px}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:24px}
  .footer-bottom{flex-direction:column}
  .footer-mini-link{flex-wrap:wrap;gap:12px}
}
@media (max-width:520px){
  .brand-name{font-size:17px}
  .page-hero h1{font-size:36px}
  .page-hero .btn{width:100%}
  .hero-actions{gap:10px}
  .stat-grid{grid-template-columns:1fr;gap:12px}
  .stat-card{padding:22px 20px}
  .rail-list{grid-auto-columns:minmax(260px,88vw)}
  .rail-card{grid-template-columns:106px 1fr}
  .rail-body p{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
  .rail-body h3{font-size:16px}
  .filter-btn{padding:0 13px;height:34px;font-size:13px}
  .mobile-search .header-search{width:100%}
  .mobile-search .header-search input{flex:1;width:auto}
  .footer-bottom{font-size:12px}
  .to-top{right:14px;bottom:18px}
}

/* roulang page: category3 */
:root{
  --bg:#050C1A;
  --bg-soft:#0A1528;
  --panel:rgba(13,26,48,0.72);
  --panel-solid:#0D1B33;
  --line:rgba(140,210,255,0.18);
  --line-strong:rgba(52,223,245,0.55);
  --accent:#34DFF5;
  --accent2:#7A7CFF;
  --text:#E8F2FF;
  --text-sub:#A8BBD4;
  --text-weak:#6C84A6;
  --success:#52D9A8;
  --star:#FFC46B;
  --warn:#FF9E6D;
  --radius-lg:20px;
  --radius-md:16px;
  --radius-sm:10px;
  --shadow-card:0 20px 50px rgba(0,0,0,0.3);
  --glow:0 0 20px rgba(52,223,245,0.18), 0 0 40px rgba(52,223,245,0.08);
  --container:1200px;
  --space:100px;
  --font-main:"PingFang SC","Microsoft YaHei UI","Noto Sans SC",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-main);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  background-image:linear-gradient(rgba(120,220,255,0.04) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,220,255,0.04) 1px,transparent 1px);
  background-size:40px 40px;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  width:680px;
  height:680px;
  left:-180px;
  top:60px;
  background:rgba(52,223,245,0.08);
  border-radius:50%;
  filter:blur(120px);
  pointer-events:none;
  z-index:0;
}
body::after{
  content:"";
  position:fixed;
  width:620px;
  height:620px;
  right:-160px;
  bottom:5%;
  background:rgba(122,124,255,0.08);
  border-radius:50%;
  filter:blur(130px);
  pointer-events:none;
  z-index:0;
}
.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button,input{font-family:var(--font-main);font-size:14px}
button{cursor:pointer;border:none;background:none}
:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:6px;
}

.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(5,12,26,0.86);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(140,210,255,0.12);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:64px;
  gap:16px;
  flex-wrap:wrap;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex-shrink:0;
}
.brand-mark{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  border-radius:12px;
  font-weight:700;
  color:#050C1A;
  background:linear-gradient(135deg,var(--accent),#6EE7F8);
  box-shadow:0 0 22px rgba(52,223,245,0.35);
  font-size:20px;
}
.brand-name{
  font-weight:700;
  font-size:19px;
  letter-spacing:1px;
  color:#fff;
  display:flex;
  align-items:center;
  gap:8px;
}
.brand-name small{
  font-size:10px;
  font-weight:600;
  letter-spacing:2px;
  color:var(--text-weak);
  text-transform:uppercase;
  border:1px solid rgba(108,132,166,0.3);
  padding:2px 7px;
  border-radius:999px;
  line-height:1.2;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:8px;
}
.main-nav .nav-link{
  padding:10px 16px;
  border-radius:999px;
  font-size:15px;
  color:var(--text-sub);
  font-weight:500;
  transition:all .25s ease;
  position:relative;
}
.main-nav .nav-link:hover{
  color:var(--accent);
  background:rgba(52,223,245,0.08);
}
.main-nav .nav-link.active{
  color:#fff;
  background:rgba(52,223,245,0.12);
}
.main-nav .nav-link.active::after{
  content:"";
  position:absolute;
  left:18px;
  right:18px;
  bottom:3px;
  height:2px;
  background:var(--accent);
  box-shadow:0 0 10px rgba(52,223,245,0.6);
  border-radius:2px;
}
.header-right{
  display:flex;
  align-items:center;
  gap:14px;
  margin-left:auto;
}
.header-search{
  display:flex;
  align-items:center;
  background:rgba(13,26,48,0.85);
  border:1px solid rgba(140,210,255,0.16);
  border-radius:999px;
  padding:4px 4px 4px 14px;
  overflow:hidden;
  transition:border-color .25s,box-shadow .25s;
}
.header-search:focus-within{
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(52,223,245,0.12);
}
.header-search input{
  border:none;
  background:transparent;
  color:var(--text);
  width:132px;
  outline:none;
}
.header-search input::placeholder{color:var(--text-weak)}
.header-search button{
  width:30px;
  height:30px;
  border-radius:50%;
  background:rgba(52,223,245,0.16);
  color:var(--accent);
  font-size:18px;
  line-height:1;
  display:grid;
  place-items:center;
  transition:background .25s;
}
.header-search button:hover{background:rgba(52,223,245,0.32)}
.trend-wrap{display:flex;align-items:center;gap:8px}
.trend-label{
  color:var(--text-weak);
  font-size:12px;
  border-left:2px solid var(--accent2);
  padding-left:8px;
  white-space:nowrap;
}
.trend-chip{
  color:var(--text-sub);
  background:rgba(122,124,255,0.1);
  font-size:12px;
  padding:3px 10px;
  border-radius:999px;
  border:1px solid rgba(122,124,255,0.2);
  transition:all .2s;
}
.trend-chip:hover{
  color:var(--accent);
  border-color:var(--accent);
}
.menu-toggle{
  display:none;
  flex-direction:column;
  width:40px;
  height:40px;
  border-radius:12px;
  justify-content:center;
  align-items:center;
  gap:5px;
  background:rgba(13,26,48,0.8);
  border:1px solid rgba(140,210,255,0.15);
}
.menu-toggle span{
  width:18px;
  height:2px;
  background:var(--text);
  border-radius:2px;
  transition:all .25s;
}
.mobile-search{display:none}

.guide-hero{
  position:relative;
  padding:92px 0 78px;
  background:
    linear-gradient(105deg,rgba(5,12,26,0.92) 15%,rgba(5,12,26,0.76) 50%,rgba(10,21,40,0.68)),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border-bottom:1px solid rgba(140,210,255,0.1);
}
.guide-hero::after{
  content:"";
  position:absolute;
  right:-60px;
  bottom:-80px;
  width:400px;
  height:400px;
  background:rgba(122,124,255,0.24);
  border-radius:50%;
  filter:blur(90px);
  pointer-events:none;
}
.guide-hero-inner{
  position:relative;
  z-index:2;
  max-width:920px;
}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--accent);
  font-size:14px;
  background:rgba(52,223,245,0.09);
  border:1px solid rgba(52,223,245,0.25);
  border-radius:999px;
  padding:4px 14px;
}
.hero-eyebrow .dot{
  width:7px;
  height:7px;
  background:var(--success);
  border-radius:50%;
  box-shadow:0 0 10px var(--success);
}
.guide-hero h1{
  font-size:clamp(36px,5.2vw,58px);
  line-height:1.2;
  font-weight:800;
  margin-top:22px;
  letter-spacing:1px;
}
.guide-hero p.lead{
  margin-top:18px;
  color:var(--text-sub);
  font-size:17px;
  line-height:1.9;
  max-width:680px;
}
.hero-actions{
  display:flex;
  align-items:center;
  gap:14px;
  flex-wrap:wrap;
  margin-top:32px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-weight:600;
  border-radius:999px;
  padding:12px 26px;
  font-size:15px;
  border:1px solid transparent;
  transition:all .25s;
}
.btn-primary{
  background:linear-gradient(135deg,#39E8F6,#5BC7FA);
  color:#03212D;
  box-shadow:0 0 16px rgba(52,223,245,0.25),0 0 32px rgba(52,223,245,0.18);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 20px rgba(52,223,245,0.4),0 0 44px rgba(52,223,245,0.22);
}
.btn-primary:active{
  transform:translateY(0);
  box-shadow:0 0 8px rgba(52,223,245,0.3);
}
.btn-ghost{
  background:rgba(10,21,40,0.7);
  border-color:rgba(140,210,255,0.28);
  color:var(--text);
}
.btn-ghost:hover{
  background:rgba(52,223,245,0.1);
  border-color:rgba(52,223,245,0.55);
  color:var(--accent);
  transform:translateY(-2px);
}
.hero-note{
  margin-top:18px;
  color:var(--text-weak);
  font-size:13px;
  display:flex;
  gap:14px;
  flex-wrap:wrap;
}
.hero-note span{display:inline-flex;gap:6px;align-items:center}

.guide-section{
  padding:var(--space) 0 0;
}
.guide-shell{
  display:grid;
  grid-template-columns:230px minmax(0,1fr);
  gap:54px;
  align-items:flex-start;
}
.side-toc{
  position:sticky;
  top:88px;
  background:var(--panel);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(140,210,255,0.14);
  border-radius:var(--radius-md);
  padding:18px 14px 20px;
}
.side-toc-title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-weight:700;
  font-size:15px;
  color:var(--text);
  padding-left:8px;
}
.side-toc-title i{
  font-style:normal;
  color:var(--accent2);
  font-size:12px;
  letter-spacing:1px;
  font-weight:400;
}
.toc-list{
  list-style:none;
  margin:14px 0 10px;
  padding:0;
}
.toc-list li{
  border-bottom:1px solid rgba(140,210,255,0.08);
}
.toc-list li:last-child{border-bottom:none}
.toc-list a{
  display:block;
  padding:9px 8px;
  color:var(--text-sub);
  font-size:14px;
  border-left:2px solid transparent;
  transition:all .2s;
}
.toc-list a:hover{
  color:var(--accent);
  background:rgba(52,223,245,0.05);
  border-left-color:var(--accent);
}
.side-toc-extra{
  margin-top:14px;
  background:rgba(10,21,40,0.6);
  border-radius:12px;
  padding:14px 12px;
}
.side-toc-extra strong{
  display:block;
  color:var(--text);
  font-size:14px;
  margin-bottom:4px;
}
.side-toc-extra p{
  color:var(--text-weak);
  font-size:13px;
  line-height:1.7;
}

.guide-flow{
  min-width:0;
}
.panel-title{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:10px;
  font-size:16px;
  color:var(--accent);
}
.panel-title::before{
  content:"";
  width:20px;
  height:2px;
  background:var(--accent);
  box-shadow:0 0 10px var(--accent);
  border-radius:2px;
}
.guide-desc{
  color:var(--text-sub);
  font-size:15px;
  margin-bottom:44px;
}
.entry-item{
  display:grid;
  grid-template-columns:minmax(0,0.92fr) minmax(0,1.08fr);
  gap:30px;
  align-items:center;
  padding:22px;
  border-radius:var(--radius-lg);
  background:rgba(10,21,40,0.44);
  border:1px solid rgba(140,210,255,0.1);
  transition:border-color .3s,box-shadow .3s;
  scroll-margin-top:90px;
}
.entry-item:hover{
  border-color:rgba(52,223,245,0.2);
  box-shadow:0 16px 40px rgba(0,0,0,0.25);
}
.entry-item.even .entry-media{order:2}
.entry-item.even .entry-content{order:1}
.entry-media{
  position:relative;
  border-radius:16px;
  overflow:hidden;
  min-height:200px;
  background:linear-gradient(135deg,#0D1B33,#17243f);
}
.entry-media img{
  width:100%;
  height:100%;
  min-height:240px;
  object-fit:cover;
  transition:transform .45s ease;
}
.entry-item:hover .entry-media img{transform:scale(1.03)}
.entry-content .tag{
  display:inline-block;
  background:rgba(122,124,255,0.14);
  color:#B9BDFF;
  border:1px solid rgba(122,124,255,0.3);
  font-size:12px;
  padding:2px 12px;
  border-radius:999px;
  letter-spacing:1px;
}
.entry-content h2{
  font-size:26px;
  font-weight:700;
  margin:14px 0 12px;
  line-height:1.4;
  color:#fff;
}
.entry-content p{
  color:var(--text-sub);
  font-size:15.5px;
  line-height:1.9;
  margin-bottom:16px;
}
.check-list{
  list-style:none;
  padding:0;
  background:rgba(5,12,26,0.42);
  border-radius:12px;
  overflow:hidden;
}
.check-list li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  padding:10px 14px;
  border-bottom:1px solid rgba(140,210,255,0.08);
  font-size:14px;
  color:var(--text-sub);
}
.check-list li:last-child{border-bottom:none}
.check-list li::before{
  content:"✓";
  color:var(--success);
  font-weight:700;
  flex-shrink:0;
}
.entry-meta{
  margin-top:16px;
  display:flex;
  gap:8px;
  flex-wrap:wrap;
}
.mini-badge{
  font-size:12px;
  padding:4px 11px;
  border-radius:999px;
  background:rgba(52,223,245,0.1);
  color:var(--accent);
}

.guide-main-bottom{
  padding:90px 0 0;
}
.section-head{
  display:flex;
  align-items:center;
  gap:14px;
  margin-bottom:36px;
}
.section-head::before{
  content:"";
  width:4px;
  height:28px;
  background:var(--accent);
  border-radius:4px;
  box-shadow:0 0 12px rgba(52,223,245,0.6);
}
.section-head h2{
  font-size:30px;
  color:#fff;
  font-weight:700;
  line-height:1.3;
}
.section-sub{
  color:var(--text-sub);
  font-size:15px;
  margin-top:-20px;
  margin-bottom:34px;
  padding-left:22px;
}
.check-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.check-card{
  background:linear-gradient(145deg,rgba(13,26,48,0.8),rgba(10,21,40,0.72));
  border:1px solid rgba(140,210,255,0.12);
  border-radius:18px;
  padding:24px 20px;
  transition:all .25s;
}
.check-card:hover{
  transform:translateY(-4px);
  border-color:rgba(52,223,245,0.4);
  box-shadow:var(--shadow-card);
}
.check-card .ico{
  width:38px;
  height:38px;
  border-radius:12px;
  background:rgba(52,223,245,0.12);
  color:var(--accent);
  display:grid;
  place-items:center;
  font-size:18px;
  margin-bottom:16px;
}
.check-card h3{font-size:17px;color:#fff;margin-bottom:10px}
.check-card p{font-size:13.5px;color:var(--text-sub);line-height:1.7}
.check-card .state{
  display:inline-block;
  margin-top:12px;
  font-size:12px;
  padding:2px 10px;
  border-radius:999px;
  background:rgba(82,217,168,0.1);
  color:var(--success);
  border:1px solid rgba(82,217,168,0.18);
}

.flow-steps{
  margin-top:36px;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  counter-reset:flow;
}
.flow-step{
  background:rgba(10,21,40,0.5);
  border:1px solid rgba(140,210,255,0.12);
  border-radius:18px;
  padding:26px 20px 22px;
  position:relative;
  transition:transform .25s,border-color .25s;
}
.flow-step:hover{
  transform:translateY(-5px);
  border-color:rgba(122,124,255,0.45);
}
.flow-step::before{
  counter-increment:flow;
  content:counter(flow,decimal-leading-zero);
  font-size:32px;
  font-weight:800;
  color:rgba(52,223,245,0.22);
  display:block;
  margin-bottom:8px;
  line-height:1;
}
.flow-step h3{
  color:#fff;
  font-size:16px;
  margin-bottom:8px;
}
.flow-step p{
  color:var(--text-sub);
  font-size:13px;
  line-height:1.7;
}

.faq-area{
  padding:90px 0 0;
  max-width:980px;
}
.faq-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.faq-card{
  background:rgba(10,21,40,0.52);
  border:1px solid rgba(140,210,255,0.14);
  border-radius:16px;
  overflow:hidden;
  transition:border-color .2s;
}
.faq-card[open]{
  border-color:rgba(52,223,245,0.4);
  background:rgba(13,26,48,0.82);
}
.faq-card summary{
  cursor:pointer;
  padding:16px 18px;
  font-weight:600;
  color:var(--text);
  list-style:none;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:10px;
  font-size:15px;
  min-height:52px;
}
.faq-card summary::-webkit-details-marker{display:none}
.faq-card summary::after{
  content:"+";
  font-size:22px;
  font-weight:400;
  color:var(--accent);
  width:26px;
  height:26px;
  display:grid;
  place-items:center;
  border-radius:8px;
  background:rgba(52,223,245,0.1);
  transition:transform .3s;
  flex-shrink:0;
}
.faq-card[open] summary::after{
  transform:rotate(135deg);
}
.faq-body{
  padding:0 18px 18px;
  color:var(--text-sub);
  font-size:14px;
  line-height:1.9;
  border-top:1px solid rgba(140,210,255,0.1);
  margin:0 18px 0;
  padding:14px 0 16px;
}

.cta-panel{
  margin:90px 0;
  background:
    radial-gradient(circle at 12% 0%,rgba(122,124,255,0.21),transparent 45%),
    radial-gradient(circle at 82% 110%,rgba(52,223,245,0.12),transparent 40%),
    linear-gradient(145deg,rgba(13,26,48,0.9),rgba(8,17,32,0.96));
  border:1px solid rgba(140,210,255,0.22);
  border-radius:28px;
  padding:54px 48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:34px;
  flex-wrap:wrap;
}
.cta-panel .cta-copy{flex:1 1 360px}
.cta-panel .eyebrow{
  color:var(--accent);
  font-size:13px;
  letter-spacing:2px;
  text-transform:uppercase;
}
.cta-panel h2{
  font-size:32px;
  line-height:1.35;
  margin:8px 0 12px;
  color:#fff;
}
.cta-panel p{
  color:var(--text-sub);
  font-size:15px;
  line-height:1.8;
}
.cta-actions{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
}
.qr-box{
  background:#fff;
  border-radius:12px;
  padding:10px;
  width:86px;
  height:86px;
  display:grid;
  place-items:center;
  color:#0A1528;
  font-size:11px;
  font-weight:700;
  text-align:center;
  align-self:center;
}
.qr-box small{
  position:absolute;
  margin-top:104px;
  color:var(--text-weak);
  letter-spacing:1px;
}

.site-footer{
  background:var(--bg);
  border-top:1px solid rgba(140,210,255,0.14);
  padding:60px 0 18px;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 0.8fr 0.8fr;
  gap:40px;
  padding-bottom:30px;
}
.footer-brand .brand-name{color:var(--text)}
.footer-desc{
  color:var(--text-sub);
  font-size:14px;
  line-height:1.9;
  max-width:400px;
  margin-top:14px;
}
.footer-col h4{
  color:var(--text);
  font-weight:600;
  font-size:15px;
  margin-bottom:16px;
  letter-spacing:1px;
}
.footer-col a{
  display:block;
  color:var(--text-sub);
  font-size:14px;
  padding:6px 0;
  transition:color .2s,padding-left .2s;
}
.footer-col a:hover{
  color:var(--accent);
  padding-left:5px;
}
.footer-bottom{
  border-top:1px solid rgba(140,210,255,0.12);
  padding-top:20px;
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  color:var(--text-weak);
  font-size:13px;
}
.footer-mini-link{display:flex;gap:20px}
.footer-mini-link a{color:var(--text-weak);transition:color .2s}
.footer-mini-link a:hover{color:var(--accent)}

@media (max-width:1024px){
  .header-right{
    display:none;
  }
  .main-nav{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    z-index:200;
    background:rgba(5,12,26,0.97);
    backdrop-filter:blur(20px);
    -webkit-backdrop-filter:blur(20px);
    border-left:1px solid rgba(140,210,255,0.2);
    width:min(310px,82vw);
    flex-direction:column;
    align-items:flex-start;
    gap:4px;
    padding:26px 22px 34px;
    box-shadow:-20px 0 60px rgba(0,0,0,0.4);
    transform:translateX(105%);
    transition:transform .35s ease;
    overflow-y:auto;
  }
  .main-nav.open{
    transform:translateX(0);
  }
  .main-nav .nav-link{
    width:100%;
    padding:13px 14px;
    font-size:16px;
  }
  .menu-toggle{
    display:flex;
    position:relative;
    z-index:220;
  }
  .menu-toggle.active span:nth-child(1){
    transform:translateY(7px) rotate(45deg);
  }
  .menu-toggle.active span:nth-child(2){
    opacity:0;
  }
  .menu-toggle.active span:nth-child(3){
    transform:translateY(-7px) rotate(-45deg);
  }
  .guide-shell{
    grid-template-columns:1fr;
    gap:28px;
  }
  .side-toc{
    position:static;
    overflow-x:auto;
    padding:14px;
  }
  .toc-list{
    display:flex;
    gap:6px;
    margin:0;
    padding-bottom:2px;
    overflow-x:auto;
  }
  .toc-list li{border:none}
  .toc-list a{
    white-space:nowrap;
    padding:7px 13px;
    border:1px solid rgba(140,210,255,0.14);
    border-radius:999px;
    font-size:13px;
  }
  .toc-list a:hover{border-left-color:rgba(52,223,245,0.5)}
  .side-toc-title{margin-bottom:10px}
  .side-toc-extra{display:none}
}
@media(max-width:768px){
  :root{--space:60px}
  .container{padding:0 18px}
  .guide-hero{padding:64px 0 54px}
  .entry-item{
    grid-template-columns:1fr;
    padding:14px;
    gap:16px;
  }
  .entry-item.even .entry-media{order:0}
  .entry-item.even .entry-content{order:0}
  .entry-media img{min-height:200px;max-height:260px}
  .entry-content h2{font-size:22px}
  .check-grid{grid-template-columns:1fr;gap:14px}
  .flow-steps{grid-template-columns:2fr;gap:14px}
  .faq-grid{grid-template-columns:1fr}
  .cta-panel{padding:34px 20px;border-radius:22px}
  .cta-actions .qr-box{margin-top:8px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
}
@media(max-width:520px){
  .flow-steps{grid-template-columns:1fr}
  .brand-name{font-size:16px}
  .brand-name small{display:none}
  .hero-actions .btn{
    width:100%;
  }
  .guide-hero h1{
    font-size:31px;
  }
  .guide-hero p.lead{
    font-size:15px;
  }
  .entry-media img{min-height:170px}
  .cta-actions{
    width:100%;
  }
}

/* roulang page: category4 */
:root {
    --bg-deep: #050C1A;
    --bg-panel: #0A1528;
    --panel-glass: rgba(13, 26, 48, 0.72);
    --panel-strong: #0D1B33;
    --accent: #34DFF5;
    --accent-dark: #1EA6C9;
    --accent-2: #7A7CFF;
    --text-main: #E8F2FF;
    --text-sub: #A8BBD4;
    --text-weak: #6C84A6;
    --success: #52D9A8;
    --star: #FFC46B;
    --warning: #FF9E6D;
    --danger-soft: #FF6B8B;
    --border-soft: rgba(140, 210, 255, 0.18);
    --border-weak: rgba(140, 210, 255, 0.10);
    --radius-xl: 24px;
    --radius-lg: 20px;
    --radius-md: 16px;
    --radius-btn: 10px;
    --header-height: 64px;
    --container: 1200px;
    --section-gap: 92px;
    --shadow-glow: 0 0 26px rgba(52, 223, 245, 0.12);
    --shadow-hover: 0 20px 50px rgba(0, 0, 0, 0.34);
  }

  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    padding: var(--header-height) 0 0;
    background: var(--bg-deep);
    color: var(--text-main);
    font-family: "PingFang SC", "Microsoft YaHei UI", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }

  body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    background-image:
      linear-gradient(rgba(120, 220, 255, 0.035) 1px, transparent 1px),
      linear-gradient(90deg, rgba(120, 220, 255, 0.035) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
  }

  body::after {
    content: "";
    position: fixed;
    left: -120px;
    top: 12%;
    width: 500px;
    height: 500px;
    z-index: -1;
    background: radial-gradient(circle, rgba(52, 223, 245, 0.07), rgba(52, 223, 245, 0) 68%);
    pointer-events: none;
  }

  h1,
  h2,
  h3,
  h4 {
    margin: 0;
    line-height: 1.35;
    color: var(--text-main);
  }

  p {
    margin-top: 0;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

  img {
    max-width: 100%;
    display: block;
  }

  button,
  input {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
  }

  button {
    border: 0;
    background: none;
    cursor: pointer;
  }

  a:focus-visible,
  button:focus-visible,
  input:focus-visible,
  summary:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 8px;
    box-shadow: 0 0 0 6px rgba(52, 223, 245, 0.16);
  }

  .container {
    width: min(100% - 40px, var(--container));
    margin: 0 auto;
  }

  .section {
    padding: 72px 0;
    position: relative;
  }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 999;
    background: rgba(5, 12, 26, 0.88);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-soft);
  }

  .header-inner {
    display: flex;
    align-items: center;
    gap: 20px;
    min-height: var(--header-height);
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #04121F;
    font-weight: 800;
    font-size: 19px;
    box-shadow: 0 0 18px rgba(52, 223, 245, 0.35);
  }

  .brand-name {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
    font-weight: 700;
    font-size: 19px;
    color: var(--text-main);
    white-space: nowrap;
  }

  .brand-name small {
    margin-top: 2px;
    font-size: 9px;
    letter-spacing: 0.2em;
    color: var(--text-weak);
    font-weight: 400;
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: 8px;
  }

  .main-nav .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: 8px 10px;
    color: var(--text-sub);
    font-size: 15px;
    font-weight: 400;
    transition: color 0.25s ease;
    white-space: nowrap;
  }

  .main-nav .nav-link::after {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: -2px;
    height: 2px;
    border-radius: 4px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.22s ease;
  }

  .main-nav .nav-link:hover {
    color: var(--text-main);
  }

  .main-nav .nav-link:hover::after {
    transform: scaleX(1);
  }

  .main-nav .nav-link.active {
    color: var(--accent);
  }

  .main-nav .nav-link.active::after {
    transform: scaleX(1);
    box-shadow: 0 0 12px rgba(52, 223, 245, 0.55);
  }

  .mobile-search {
    display: none;
  }

  .header-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 14px;
  }

  .header-search {
    display: flex;
    align-items: center;
    border: 1px solid var(--border-soft);
    background: rgba(6, 14, 28, 0.72);
    border-radius: 999px;
    overflow: hidden;
    transition: border-color 0.24s ease, box-shadow 0.24s ease;
  }

  .header-search:focus-within {
    border-color: rgba(52, 223, 245, 0.65);
    box-shadow: 0 0 0 3px rgba(52, 223, 245, 0.1);
  }

  .header-search input {
    width: 146px;
    padding: 7px 4px 7px 14px;
    background: transparent;
    border: 0;
    color: var(--text-main);
    outline: none;
    font-size: 13px;
  }

  .header-search input::placeholder {
    color: var(--text-weak);
  }

  .header-search button {
    height: 30px;
    width: 48px;
    color: var(--accent);
    font-size: 20px;
    font-weight: 700;
    transition: background 0.2s ease;
    border-radius: 999px;
  }

  .header-search button:hover {
    background: rgba(52, 223, 245, 0.1);
  }

  .trend-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .trend-label {
    font-size: 12px;
    color: var(--text-weak);
    white-space: nowrap;
  }

  .trend-chip {
    font-size: 12px;
    line-height: 1;
    color: var(--text-sub);
    border: 1px solid rgba(122, 124, 255, 0.35);
    background: rgba(122, 124, 255, 0.06);
    padding: 5px 10px;
    border-radius: 999px;
    transition: all 0.2s ease;
    white-space: nowrap;
  }

  .trend-chip:hover {
    color: var(--text-main);
    border-color: var(--accent-2);
    background: rgba(122, 124, 255, 0.18);
  }

  .menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-soft);
    border-radius: 10px;
    background: rgba(13, 26, 48, 0.6);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
  }

  .menu-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 4px;
    background: var(--text-main);
    transition: all 0.24s ease;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .page-hero {
    position: relative;
    overflow: hidden;
    padding: 118px 0 84px;
    background-color: #041020;
    background-image:
      linear-gradient(180deg, rgba(4, 13, 28, 0.82), rgba(5, 12, 26, 0.94)),
      url('/assets/images/backpic/back-3.webp');
    background-position: center;
    background-size: cover;
  }

  .page-hero::after {
    content: "";
    position: absolute;
    right: -120px;
    top: -120px;
    width: 460px;
    height: 460px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(52, 223, 245, 0.18), transparent 70%);
    pointer-events: none;
  }

  .breadcrumb {
    display: flex;
    gap: 10px;
    align-items: center;
    font-size: 13px;
    color: var(--text-weak);
    margin-bottom: 22px;
    position: relative;
    z-index: 1;
  }

  .breadcrumb a {
    color: var(--text-sub);
  }

  .breadcrumb a:hover {
    color: var(--accent);
  }

  .breadcrumb span {
    color: var(--text-weak);
  }

  .hero-content {
    position: relative;
    z-index: 2;
    max-width: 860px;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-sub);
    background: rgba(13, 26, 48, 0.72);
    border: 1px solid var(--border-soft);
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 20px;
  }

  .hero-badge i {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 10px rgba(82, 217, 168, 0.7);
  }

  .page-hero h1 {
    font-size: clamp(38px, 5vw, 56px);
    font-weight: 700;
    letter-spacing: 0.02em;
    line-height: 1.25;
    margin-bottom: 18px;
    text-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  }

  .page-hero .hero-sub {
    font-size: 17px;
    line-height: 1.85;
    color: var(--text-sub);
    max-width: 760px;
    margin-bottom: 30px;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
  }

  .btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 24px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 600;
    letter-spacing: .02em;
    transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease, color 0.22s ease;
    will-change: transform;
  }

  .btn-primary {
    background: linear-gradient(135deg, #27D4EC, var(--accent));
    color: #04121F;
    box-shadow: 0 0 16px rgba(52, 223, 245, 0.28), 0 0 34px rgba(52, 223, 245, 0.2), 0 0 60px rgba(52, 223, 245, 0.06);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(52, 223, 245, 0.32), 0 0 40px rgba(52, 223, 245, 0.26), 0 0 72px rgba(52, 223, 245, 0.12);
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 0 10px rgba(52, 223, 245, 0.2);
  }

  .btn-outline {
    border: 1px solid rgba(122, 124, 255, 0.6);
    color: var(--text-main);
    background: rgba(122, 124, 255, 0.08);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
  }

  .btn-outline:hover {
    background: rgba(122, 124, 255, 0.18);
    border-color: var(--accent-2);
    transform: translateY(-2px);
  }

  .btn-outline:active {
    transform: translateY(0);
  }

  .section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 34px;
    flex-wrap: wrap;
  }

  .section-head h2 {
    font-size: clamp(26px, 3vw, 34px);
    font-weight: 600;
    padding-left: 16px;
    position: relative;
  }

  .section-head h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    bottom: 8px;
    width: 4px;
    background: var(--accent);
    border-radius: 4px;
    box-shadow: 0 0 12px rgba(52, 223, 245, 0.6);
  }

  .section-desc {
    color: var(--text-sub);
    max-width: 660px;
    font-size: 15px;
  }

  .quick-track {
    display: flex;
    gap: 18px;
    overflow-x: auto;
    padding: 4px 2px 22px;
    scroll-snap-type: x mandatory;
    scrollbar-width: thin;
    scrollbar-color: rgba(52, 223, 245, 0.3) rgba(255, 255, 255, 0.04);
  }

  .quick-track::-webkit-scrollbar {
    height: 6px;
  }

  .quick-track::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.04);
    border-radius: 12px;
  }

  .quick-track::-webkit-scrollbar-thumb {
    background: rgba(52, 223, 245, 0.3);
    border-radius: 12px;
  }

  .quick-card {
    flex: 0 0 260px;
    scroll-snap-align: start;
    background: linear-gradient(160deg, rgba(16, 30, 56, .92), rgba(6, 15, 31, .78));
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
    min-height: 150px;
    display: flex;
    flex-direction: column;
  }

  .quick-card .card-num {
    font-size: 13px;
    color: var(--accent-2);
    font-weight: 600;
    letter-spacing: 0.12em;
    margin-bottom: 14px;
  }

  .quick-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
  }

  .quick-card p {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.65;
    margin-bottom: 0;
  }

  .quick-card:hover {
    transform: translateY(-6px);
    border-color: rgba(52, 223, 245, 0.45);
    box-shadow: var(--shadow-hover), var(--shadow-glow);
  }

  .service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }

  .service-card {
    background: var(--panel-glass);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    padding: 26px;
    position: relative;
    overflow: hidden;
    transition: transform .28s ease, border-color .28s ease, background .28s ease;
    display: flex;
    flex-direction: column;
  }

  .service-card::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--accent), var(--accent-2));
    opacity: 0.7;
  }

  .service-card h3 {
    font-size: 19px;
    font-weight: 600;
    margin-bottom: 10px;
  }

  .service-card p {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.75;
    flex: 1;
    margin-bottom: 20px;
  }

  .service-card .link-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--accent);
    transition: gap 0.24s ease;
  }

  .service-card .link-more:hover {
    gap: 12px;
  }

  .faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    align-items: start;
  }

  .faq-item {
    background: rgba(10, 21, 40, .76);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color .25s ease, box-shadow .25s ease;
  }

  .faq-item[open] {
    border-color: rgba(52, 223, 245, 0.4);
    box-shadow: var(--shadow-glow);
  }

  .faq-q {
    display: flex;
    align-items: center;
    gap: 14px;
    min-height: 54px;
    padding: 14px 18px;
    font-size: 16px;
    color: var(--text-main);
    font-weight: 500;
    cursor: pointer;
    user-select: none;
    list-style: none;
    line-height: 1.6;
  }

  .faq-q::-webkit-details-marker {
    display: none;
  }

  .faq-q .faq-icon {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgba(52, 223, 245, 0.1);
    position: relative;
    flex-shrink: 0;
    transition: background .25s ease, transform .25s ease;
  }

  .faq-q .faq-icon::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 46%;
    width: 7px;
    height: 7px;
    border-right: 2px solid var(--accent);
    border-bottom: 2px solid var(--accent);
    transform: translate(-50%, -50%) rotate(45deg);
    transition: transform .25s ease;
  }

  .faq-item[open] .faq-q .faq-icon {
    background: rgba(52, 223, 245, 0.18);
    transform: rotate(180deg);
  }

  .faq-item[open] .faq-q .faq-icon::before {
    transform: translate(-50%, -60%) rotate(225deg);
  }

  .faq-a {
    border-top: 1px solid rgba(140, 210, 255, 0.1);
    background: rgba(5, 14, 28, 0.4);
  }

  .faq-a-inner {
    padding: 18px 20px 22px;
  }

  .faq-a p {
    margin-bottom: 0;
    font-size: 15px;
    color: var(--text-sub);
    line-height: 1.85;
  }

  .security-note {
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 158, 109, 0.24);
    background: rgba(30, 22, 18, 0.45);
    background: linear-gradient(180deg, rgba(30, 20, 15, 0.5), rgba(10, 16, 28, 0.6));
    padding: 30px;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 24px;
    align-items: flex-start;
  }

  .security-note .note-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: rgba(255, 158, 109, 0.14);
    color: var(--warning);
    display: grid;
    place-items: center;
    font-weight: 800;
    font-size: 20px;
  }

  .security-note h3 {
    font-size: 18px;
    margin-bottom: 8px;
  }

  .security-note p {
    color: var(--text-sub);
    font-size: 15px;
    margin-bottom: 0;
  }

  .download-cta {
    margin-bottom: 80px;
    border-radius: var(--radius-xl);
    background:
      linear-gradient(180deg, rgba(9, 22, 42, .9), rgba(7, 15, 31, .94)),
      url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
    border: 1px solid rgba(52, 223, 245, 0.22);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
    padding: 46px;
    display: grid;
    grid-template-columns: 1fr 250px;
    gap: 36px;
    align-items: center;
    position: relative;
    overflow: hidden;
  }

  .download-cta::after {
    content: "";
    position: absolute;
    right: -80px;
    bottom: -80px;
    width: 260px;
    height: 260px;
    background: radial-gradient(circle, rgba(52, 223, 245, 0.12), transparent 70%);
    pointer-events: none;
  }

  .download-cta h2 {
    font-size: clamp(25px, 3vw, 34px);
    font-weight: 600;
    margin-bottom: 10px;
  }

  .download-cta .cta-desc {
    color: var(--text-sub);
    font-size: 15px;
    margin-bottom: 22px;
    max-width: 560px;
  }

  .download-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
  }

  .btn-download {
    display: inline-flex;
    align-items: center;
    min-height: 46px;
    padding: 0 26px;
    border-radius: 12px;
    background: linear-gradient(135deg, #22CFE6, var(--accent));
    color: #03141F;
    font-weight: 700;
    font-size: 15px;
    box-shadow: 0 0 18px rgba(52, 223, 245, .28), 0 0 42px rgba(52, 223, 245, .12);
    transition: transform .24s ease, box-shadow .24s ease;
  }

  .btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 24px rgba(52, 223, 245, .4), 0 0 56px rgba(52, 223, 245, .16);
  }

  .btn-download.secondary {
    background: rgba(10, 24, 46, .8);
    border: 1px solid rgba(140, 210, 255, .2);
    color: var(--text-main);
    box-shadow: none;
  }

  .btn-download.secondary:hover {
    border-color: rgba(52, 223, 245, .5);
    background: rgba(14, 32, 58, .85);
  }

  .qr-wrap {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    position: relative;
    z-index: 2;
  }

  .qr-box {
    width: 132px;
    height: 132px;
    border-radius: 18px;
    background: #F5F8FF;
    padding: 10px;
    display: block;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .04), 0 12px 24px rgba(0, 0, 0, .22);
  }

  .qr-pattern {
    width: 100%;
    height: 100%;
    border-radius: 10px;
    background:
      linear-gradient(45deg, #0B182F 25%, transparent 25%, transparent 75%, #0B182F 75%),
      linear-gradient(45deg, #0B182F 25%, #EFF4FF 25%, #EFF4FF 75%, #0B182F 75%);
    background-position: 0 0, 9px 9px;
    background-size: 18px 18px;
    opacity: .9;
  }

  .qr-caption {
    font-size: 14px;
    color: var(--text-sub);
  }

  .qr-caption strong {
    color: var(--text-main);
    font-weight: 600;
  }

  .site-footer {
    background: #040A18;
    border-top: 1px solid rgba(140, 210, 255, .1);
    margin-top: 60px;
  }

  .site-footer .container {
    padding-top: 54px;
    padding-bottom: 28px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 34px;
  }

  .footer-brand .brand {
    margin-bottom: 16px;
  }

  .footer-desc {
    margin: 0;
    color: var(--text-sub);
    font-size: 14px;
    max-width: 420px;
    line-height: 1.8;
  }

  .footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 14px;
  }

  .footer-col a {
    display: block;
    padding: 7px 0;
    font-size: 14px;
    color: var(--text-sub);
    transition: color .2s ease, padding-left .2s ease;
  }

  .footer-col a:hover {
    color: var(--accent);
    padding-left: 5px;
  }

  .footer-bottom {
    border-top: 1px solid rgba(140, 210, 255, .08);
    padding-top: 22px;
    display: flex;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    color: var(--text-weak);
    font-size: 13px;
  }

  .footer-bottom a {
    color: var(--text-weak);
    padding: 0 5px;
  }

  .footer-bottom a:hover {
    color: var(--accent);
  }

  .back-top {
    position: fixed;
    right: 22px;
    bottom: 32px;
    width: 42px;
    height: 42px;
    z-index: 98;
    border-radius: 12px;
    border: 1px solid rgba(140, 210, 255, .22);
    background: rgba(6, 16, 32, .9);
    color: var(--accent);
    font-size: 20px;
    display: grid;
    place-items: center;
    box-shadow: 0 8px 24px rgba(0, 0, 0, .3);
    transition: background .2s ease, transform .2s ease;
  }

  .back-top:hover {
    background: rgba(14, 30, 58, .95);
    transform: translateY(-3px);
  }

  @media (min-width: 1281px) {
    .container {
      width: min(100% - 48px, var(--container));
    }
  }

  @media (min-width: 1025px) and (max-width: 1280px) {
    .main-nav .nav-link {
      font-size: 14px;
      padding: 8px 7px;
    }

    .trend-label {
      display: none;
    }

    .header-search input {
      width: 118px;
    }

    .header-right {
      gap: 9px;
    }

    .brand-name {
      font-size: 17px;
    }
  }

  @media (max-width: 1024px) {
    .menu-toggle {
      display: flex;
      margin-left: auto;
    }

    .header-right .header-search {
      display: none;
    }

    .header-right .trend-wrap {
      display: none;
    }

    .main-nav {
      position: fixed;
      top: var(--header-height);
      left: 0;
      right: 0;
      bottom: 0;
      z-index: 998;
      background: rgba(4, 10, 22, .97);
      -webkit-backdrop-filter: blur(18px);
      backdrop-filter: blur(18px);
      margin: 0;
      padding: 12px 24px 32px;
      flex-direction: column;
      align-items: stretch;
      gap: 2px;
      overflow-y: auto;
      opacity: 0;
      pointer-events: none;
      transform: translateY(-12px);
      transition: opacity .24s ease, transform .24s ease;
      border-top: 1px solid rgba(140, 210, 255, .1);
    }

    .main-nav.open {
      opacity: 1;
      pointer-events: auto;
      transform: translateY(0);
    }

    .main-nav .nav-link {
      font-size: 16px;
      padding: 15px 8px;
      border-bottom: 1px solid rgba(140, 210, 255, .07);
    }

    .main-nav .nav-link::after {
      display: none;
    }

    .main-nav .nav-link.active {
      background: rgba(52, 223, 245, .06);
      border-radius: 8px;
      color: var(--accent);
    }

    .mobile-search {
      display: block;
      margin-top: 20px;
      padding-top: 18px;
      border-top: 1px solid rgba(140, 210, 255, .1);
    }

    .mobile-search .header-search {
      width: 100%;
      display: flex;
      border-radius: 12px;
    }

    .mobile-search .header-search input {
      flex: 1;
      width: 100%;
    }

    .page-hero {
      padding: 96px 0 64px;
    }

    .service-grid {
      grid-template-columns: repeat(2, 1fr);
    }

    .faq-grid {
      grid-template-columns: 1fr;
    }

    .download-cta {
      grid-template-columns: 1fr;
      padding: 36px;
    }

    .qr-wrap {
      align-items: flex-start;
      flex-direction: row;
      gap: 18px;
      justify-content: center;
    }

    .qr-caption {
      text-align: left;
    }
  }

  @media (max-width: 768px) {
    .section {
      padding: 52px 0;
    }

    .container {
      width: min(100% - 32px, 100%);
    }

    .page-hero {
      padding: 76px 0 52px;
    }

    .page-hero h1 {
      font-size: 36px;
    }

    .page-hero .hero-sub {
      font-size: 15px;
    }

    .service-grid {
      grid-template-columns: 1fr;
    }

    .quick-card {
      flex-basis: 82%;
    }

    .section-head h2 {
      font-size: 25px;
    }

    .security-note {
      padding: 24px;
      grid-template-columns: 1fr;
    }

    .download-cta {
      padding: 28px 22px;
    }

    .download-btns .btn-download {
      width: 100%;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 28px;
    }

    .footer-col a {
      display: inline-block;
      margin-right: 18px;
      padding: 8px 0;
    }

    .footer-bottom {
      flex-direction: column;
      line-height: 1.7;
    }
  }

  @media (max-width: 520px) {
    body {
      font-size: 15px;
    }

    .brand-name {
      font-size: 16px;
    }

    .brand-mark {
      width: 30px;
      height: 30px;
      font-size: 16px;
    }

    .header-inner {
      gap: 10px;
    }

    .trend-wrap {
      display: none;
    }

    .page-hero h1 {
      font-size: 30px;
    }

    .page-hero .hero-sub {
      font-size: 14px;
    }

    .hero-actions .btn {
      width: 100%;
    }

    .quick-card {
      flex-basis: 88%;
    }

    .faq-q {
      font-size: 15px;
      align-items: flex-start;
    }

    .faq-q .faq-icon {
      width: 26px;
      height: 26px;
      flex-shrink: 0;
    }

    .security-note h3 {
      font-size: 17px;
    }

    .qr-wrap {
      flex-direction: column;
      text-align: center;
    }

    .qr-caption {
      text-align: center;
    }

    .back-top {
      right: 14px;
      bottom: 22px;
    }
  }