/* roulang page: index */
:root{
  --brand-600:#1D5BD6;
  --brand-700:#1449AE;
  --brand-500:#3D7BF0;
  --brand-100:#E8F0FE;
  --accent-500:#FF7A2F;
  --accent-100:#FFEADF;
  --ink-900:#0E1B2E;
  --ink-700:#2A3A52;
  --ink-600:#55647C;
  --ink-400:#8A97AB;
  --line:#E4E9F2;
  --bg:#F5F8FD;
  --surface:#FFFFFF;
  --ok:#12A150;
  --dark:#0C1C33;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-xl:22px;
  --sh-1:0 6px 18px rgba(17,42,84,.06);
  --sh-2:0 12px 30px rgba(17,42,84,.10);
  --section-y:88px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Inter,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease;}
a:hover{color:var(--brand-700);}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:0;}
h1{font-size:clamp(30px,4.6vw,52px);line-height:1.15;font-weight:800;letter-spacing:-.02em;}
h2{font-size:clamp(24px,2.8vw,36px);line-height:1.25;font-weight:700;}
h3{font-size:20px;line-height:1.4;font-weight:700;}
h4{font-size:17px;line-height:1.5;font-weight:600;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:3px solid rgba(29,91,214,.28);
  outline-offset:2px;
  border-radius:4px;
}
.container,
.container-lg,
.container-xl{
  max-width:1200px;
  padding-left:20px;
  padding-right:20px;
  margin-left:auto;
  margin-right:auto;
}
@media (min-width:1440px){
  .container,.container-lg,.container-xl{max-width:1280px;}
}
.row{--bs-gutter-x:24px;--bs-gutter-y:24px;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.nav-inner{
  height:68px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:24px;
  height:24px;
  border-radius:8px;
  background:var(--brand-600);
  display:flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  flex-shrink:0;
}
.brand-mark svg{width:14px;height:14px;}
.brand-text{
  font-size:17px;
  font-weight:800;
  color:var(--ink-900);
  letter-spacing:-.01em;
  white-space:nowrap;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:28px;
  margin-left:auto;
}
.nav-links a{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--ink-700);
  padding:6px 0;
  white-space:nowrap;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:0;
  height:2px;
  border-radius:2px;
  background:var(--brand-600);
  transition:width .22s ease;
}
.nav-links a:hover{color:var(--brand-600);}
.nav-links a:hover::after{width:100%;}
.nav-links a.is-active{color:var(--brand-600);}
.nav-links a.is-active::after{width:100%;}
.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.nav-toggle{
  display:none;
  width:42px;
  height:42px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:#fff;
  padding:0;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:4px;
}
.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--ink-700);
}

/* ---------- 按钮 ---------- */
.btn-brand,
.btn-outline-brand,
.btn-white,
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-family:var(--font);
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  border-radius:999px;
  padding:13px 28px;
  border:0;
  cursor:pointer;
  transition:background-color .25s ease,color .25s ease,box-shadow .25s ease,transform .18s ease,border-color .25s ease;
  text-align:center;
}
.btn-brand{background:var(--brand-600);color:#fff;}
.btn-brand:hover{background:var(--brand-700);color:#fff;box-shadow:var(--sh-2);}
.btn-brand:active{transform:scale(.98);}
.btn-outline-brand{background:#fff;border:1.5px solid var(--brand-500);color:var(--brand-600);padding:12px 26px;}
.btn-outline-brand:hover{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-600);}
.btn-outline-brand:active{transform:scale(.98);}
.btn-white{background:#fff;color:var(--brand-700);}
.btn-white:hover{background:#F2F6FE;color:var(--brand-700);box-shadow:var(--sh-2);}
.btn-white:active{transform:scale(.98);}
.btn-ghost{background:transparent;color:var(--brand-600);padding:13px 6px;}
.btn-ghost svg{transition:transform .22s ease;}
.btn-ghost:hover{color:var(--brand-700);}
.btn-ghost:hover svg{transform:translateX(3px);}
.btn-brand.w-100,.btn-white.w-100{width:100%;}

/* ---------- 通用区块 ---------- */
.section{padding:var(--section-y) 0;}
.section--tight{padding-top:64px;}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head--row{
  max-width:none;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
}
.section-head h2{margin-bottom:12px;}
.section-head p{color:var(--ink-600);font-size:16px;margin:0;max-width:62em;}
.eyebrow{
  display:inline-block;
  font-size:12px;
  font-weight:600;
  letter-spacing:.06em;
  color:var(--brand-600);
  background:var(--brand-100);
  border-radius:999px;
  padding:5px 14px;
  margin-bottom:16px;
}
.chip{
  display:inline-flex;
  align-items:center;
  font-size:12px;
  font-weight:500;
  color:var(--brand-600);
  background:var(--brand-100);
  border-radius:999px;
  padding:4px 12px;
  white-space:nowrap;
}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:600;
  color:var(--brand-600);
}
.link-more svg{transition:transform .22s ease;}
.link-more:hover svg{transform:translateX(3px);}
.nowrap{white-space:nowrap;}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding:76px 0 84px;
  background-color:var(--bg);
  background-image:linear-gradient(115deg,rgba(29,91,214,0) 58%,rgba(29,91,214,.06) 58%);
  overflow:hidden;
}
.hero-title{margin-bottom:20px;}
.hero-title .nowrap{color:var(--brand-600);}
.hero-sub{
  font-size:17px;
  line-height:1.8;
  color:var(--ink-600);
  max-width:34em;
  margin-bottom:28px;
}
.hero-actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  margin-bottom:26px;
}
.platform-badges{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
}
.platform-badges li{
  font-size:12px;
  font-weight:600;
  color:var(--ink-700);
  background:#fff;
  border:1px solid var(--line);
  border-radius:999px;
  padding:6px 16px;
}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--r-xl);
  box-shadow:var(--sh-2);
  background:var(--brand-100);
}
.hero-float{
  position:absolute;
  left:22px;
  bottom:-20px;
  background:#fff;
  border-radius:var(--r-md);
  box-shadow:var(--sh-2);
  padding:12px 18px;
  display:flex;
  flex-direction:column;
  gap:2px;
  min-width:170px;
}
.hero-float strong{font-size:17px;font-weight:800;color:var(--ink-900);line-height:1.3;}
.hero-float span{font-size:13px;color:var(--ink-400);}

/* ---------- 数据条 ---------- */
.stats-band{padding-top:0;}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.stat-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:24px;
  box-shadow:var(--sh-1);
  transition:box-shadow .25s ease,transform .25s ease;
}
.stat-card:hover{box-shadow:var(--sh-2);transform:translateY(-4px);}
.stat-value{
  font-size:26px;
  font-weight:800;
  color:var(--brand-600);
  line-height:1.25;
  letter-spacing:-.01em;
}
.stat-label{font-size:13px;color:var(--ink-600);margin-top:6px;}

/* ---------- Bento ---------- */
.bento-card{
  position:relative;
  height:100%;
  background:var(--surface);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:32px;
  border-top:3px solid transparent;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  overflow:hidden;
}
.bento-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-top-color:var(--brand-600);}
.bento-card h3{margin-bottom:12px;}
.bento-card p{font-size:15px;color:var(--ink-600);line-height:1.8;}
.bento-wide{display:flex;flex-direction:column;gap:24px;}
.bento-wide-media{
  border-radius:var(--r-md);
  overflow:hidden;
  background:var(--brand-100);
}
.bento-wide-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.icon-tile{
  width:48px;
  height:48px;
  border-radius:var(--r-md);
  background:var(--brand-100);
  color:var(--brand-600);
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:18px;
}
.bento-list{
  background:var(--surface);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:32px;
  height:100%;
  border-top:3px solid transparent;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.bento-list:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-top-color:var(--brand-600);}
.bento-list h3{margin-bottom:20px;}
.bento-list li{
  position:relative;
  padding-left:20px;
  font-size:15px;
  color:var(--ink-700);
  line-height:1.7;
  margin-bottom:14px;
}
.bento-list li:last-child{margin-bottom:0;}
.bento-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:9px;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--brand-600);
}
.bento-list li span{display:block;font-size:13px;color:var(--ink-400);}

/* ---------- 轮播 ---------- */
.carousel-shell{
  background:var(--bg);
  border-radius:var(--r-xl);
  padding:20px;
}
.shot{margin:0;}
.shot img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  border-radius:var(--r-lg);
  background:var(--brand-100);
}
.shot figcaption{
  font-size:13px;
  color:var(--ink-600);
  text-align:center;
  padding:14px 8px 4px;
}
.carousel-indicators{
  position:static;
  margin:18px 0 0;
  gap:10px;
}
.carousel-indicators [data-bs-target]{
  width:8px;
  height:8px;
  border-radius:999px;
  background:var(--brand-100);
  border:0;
  opacity:1;
  margin:0;
  transition:width .25s ease,background-color .25s ease;
}
.carousel-indicators .active{
  width:24px;
  background:var(--accent-500);
}
.carousel-control-prev,
.carousel-control-next{
  width:40px;
  height:40px;
  top:auto;
  bottom:52px;
  border-radius:50%;
  background:#fff;
  box-shadow:var(--sh-1);
  color:var(--brand-600);
  opacity:1;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:background-color .25s ease,color .25s ease,box-shadow .25s ease;
}
.carousel-control-prev{left:34px;}
.carousel-control-next{right:34px;}
.carousel-control-prev:hover,
.carousel-control-next:hover{background:var(--brand-600);color:#fff;box-shadow:var(--sh-2);}
.carousel-control-prev-icon,
.carousel-control-next-icon{display:none;}
.ctrl-arrow{display:flex;align-items:center;justify-content:center;color:inherit;}

/* ---------- 系统要求 ---------- */
.table-wrap{
  background:var(--surface);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.spec-table{
  width:100%;
  border-collapse:collapse;
  font-size:15px;
}
.spec-table thead th{
  background:var(--brand-100);
  color:var(--ink-900);
  font-size:14px;
  font-weight:700;
  text-align:left;
  padding:0 24px;
  height:48px;
  white-space:nowrap;
}
.spec-table tbody th{
  font-weight:600;
  color:var(--ink-900);
  text-align:left;
}
.spec-table tbody th,
.spec-table tbody td{
  padding:0 24px;
  height:48px;
  color:var(--ink-700);
  border-top:1px solid var(--line);
  vertical-align:middle;
}
.spec-table tbody tr:nth-child(even) th,
.spec-table tbody tr:nth-child(even) td{background:var(--bg);}
.spec-note{
  font-size:13px;
  color:var(--ink-400);
  margin-top:16px;
}

/* ---------- 评价墙 ---------- */
.reviews-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.reviews-col{display:flex;flex-direction:column;gap:24px;}
.reviews-col--offset{margin-top:32px;}
.review-card{
  position:relative;
  background:var(--surface);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:32px;
  transition:transform .25s ease,box-shadow .25s ease;
}
.review-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.review-card::before{
  content:"\201C";
  position:absolute;
  top:10px;
  right:26px;
  font-size:52px;
  line-height:1;
  font-family:Georgia,serif;
  color:rgba(255,122,47,.2);
}
.review-text{font-size:15px;line-height:1.8;color:var(--ink-700);}
.review-foot{
  display:flex;
  align-items:center;
  gap:12px;
  margin-top:22px;
  padding-top:18px;
  border-top:1px solid var(--line);
}
.avatar{
  width:44px;
  height:44px;
  border-radius:50%;
  background:var(--brand-100);
  color:var(--brand-600);
  font-size:15px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.review-meta{flex:1;min-width:0;}
.review-name{font-size:14px;font-weight:600;color:var(--ink-900);}
.review-date{font-size:12px;color:var(--ink-400);}
.stars{display:flex;gap:3px;color:var(--accent-500);}

/* ---------- 下载组 ---------- */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.dl-card{
  display:flex;
  flex-direction:column;
  gap:6px;
  background:#fff;
  border:1.5px solid var(--brand-500);
  border-radius:var(--r-lg);
  padding:24px;
  color:var(--brand-600);
  box-shadow:var(--sh-1);
  transition:transform .25s ease,box-shadow .25s ease,background-color .25s ease;
}
.dl-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);color:var(--brand-700);}
.dl-card--primary{
  background:var(--brand-600);
  border-color:var(--brand-600);
  color:#fff;
}
.dl-card--primary:hover{background:var(--brand-700);color:#fff;}
.dl-icon{display:flex;align-items:center;justify-content:center;width:40px;height:40px;margin-bottom:8px;}
.dl-name{font-size:17px;font-weight:700;color:inherit;}
.dl-meta{font-size:13px;color:var(--ink-400);}
.dl-card--primary .dl-meta{color:rgba(255,255,255,.78);}
.dl-foot{
  display:flex;
  align-items:flex-start;
  gap:24px;
  margin-top:28px;
  flex-wrap:wrap;
}
.qr-box{
  width:120px;
  height:120px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:8px;
  flex-shrink:0;
  box-shadow:var(--sh-1);
}
.qr-box img{width:100%;height:100%;object-fit:cover;border-radius:6px;}
.safety-list{display:flex;flex-direction:column;gap:10px;font-size:13px;color:var(--ink-600);}
.safety-list li{display:flex;align-items:flex-start;gap:8px;}
.safety-list i{color:var(--ok);margin-top:3px;}

/* ---------- 最新信息 ---------- */
.news-layout{display:flex;flex-direction:column;gap:24px;}
.news-lead{
  display:grid;
  grid-template-columns:minmax(0,40%) minmax(0,60%);
  background:var(--surface);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  overflow:hidden;
  color:inherit;
  transition:transform .25s ease,box-shadow .25s ease;
}
.news-lead:hover{transform:translateY(-4px);box-shadow:var(--sh-2);color:inherit;}
.news-lead-media{background:var(--brand-100);min-height:100%;}
.news-lead-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;}
.news-lead-body{padding:32px;display:flex;flex-direction:column;gap:14px;}
.news-lead-body h3{
  font-size:20px;
  line-height:1.45;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-lead:hover h3{color:var(--brand-600);}
.news-lead-excerpt{
  font-size:15px;
  color:var(--ink-600);
  line-height:1.8;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-meta{
  display:flex;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  margin-top:auto;
  font-size:13px;
  color:var(--ink-400);
}
.news-mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-mini{
  display:flex;
  flex-direction:column;
  gap:12px;
  background:var(--surface);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:24px;
  color:inherit;
  transition:transform .25s ease,box-shadow .25s ease;
}
.news-mini:hover{transform:translateY(-4px);box-shadow:var(--sh-2);color:inherit;}
.news-mini h3{
  font-size:17px;
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-mini:hover h3{color:var(--brand-600);}
.news-mini p{
  font-size:14px;
  color:var(--ink-600);
  line-height:1.75;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-mini .news-meta{margin-top:auto;}
.empty-state{
  min-height:220px;
  background:var(--surface);
  border:1px dashed var(--line);
  border-radius:var(--r-lg);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:14px;
  color:var(--ink-600);
  font-size:15px;
  text-align:center;
  padding:40px 20px;
}
.empty-state svg{color:var(--ink-400);}

/* ---------- FAQ ---------- */
.faq-wrap{background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--sh-1);overflow:hidden;}
.faq-acc .accordion-item{
  border:0;
  border-bottom:1px solid var(--line);
  background:transparent;
}
.faq-acc .accordion-item:last-child{border-bottom:0;}
.faq-acc .accordion-button{
  position:relative;
  background:#fff;
  color:var(--ink-900);
  font-size:16px;
  font-weight:600;
  line-height:1.6;
  padding:24px 56px 24px 24px;
  box-shadow:none;
  border-radius:0;
}
.faq-acc .accordion-button:not(.collapsed){
  color:var(--brand-600);
  background:#fff;
  box-shadow:none;
}
.faq-acc .accordion-button:not(.collapsed)::before{
  content:"";
  position:absolute;
  left:0;
  top:14px;
  bottom:14px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:var(--brand-600);
}
.faq-acc .accordion-button::after{
  background-image:none;
  width:9px;
  height:9px;
  border-right:2px solid var(--ink-400);
  border-bottom:2px solid var(--ink-400);
  transform:rotate(45deg);
  transition:transform .25s ease,border-color .25s ease;
  margin-left:auto;
}
.faq-acc .accordion-button:not(.collapsed)::after{
  transform:rotate(-135deg);
  border-color:var(--brand-600);
}
.faq-acc .accordion-button:focus{box-shadow:none;}
.faq-acc .accordion-body{
  font-size:15px;
  line-height:1.8;
  color:var(--ink-600);
  padding:0 56px 24px 24px;
  max-width:62em;
}

/* ---------- 底部 CTA ---------- */
.cta-band{padding:0 0 var(--section-y);}
.cta-inner{
  background:var(--brand-600);
  border-radius:var(--r-xl);
  padding:48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  box-shadow:var(--sh-2);
  flex-wrap:wrap;
}
.cta-inner h2{color:#fff;margin-bottom:10px;}
.cta-inner p{color:rgba(255,255,255,.86);font-size:15px;margin:0;max-width:46em;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--dark);
  color:#C9D6E8;
  padding:72px 0 0;
}
.footer-grid{--bs-gutter-y:36px;}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:18px;
}
.footer-brand .brand-mark{background:var(--brand-600);}
.footer-brand .brand-text{color:#fff;}
.footer-desc{font-size:14px;line-height:1.8;color:#C9D6E8;max-width:32em;}
.footer-title{
  font-size:14px;
  font-weight:600;
  color:#fff;
  margin-bottom:18px;
  letter-spacing:.02em;
}
.footer-links{display:flex;flex-direction:column;gap:12px;}
.footer-links a{
  position:relative;
  font-size:14px;
  color:#C9D6E8;
  display:inline-block;
  width:fit-content;
  padding-bottom:2px;
}
.footer-links a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:0;
  height:2px;
  border-radius:2px;
  background:var(--accent-500);
  transition:width .22s ease;
}
.footer-links a:hover{color:#fff;}
.footer-links a:hover::after{width:100%;}
.footer-support{font-size:14px;line-height:1.9;color:#C9D6E8;}
.footer-support strong{color:#fff;font-weight:600;}
.footer-bottom{
  margin-top:56px;
  border-top:1px solid rgba(201,214,232,.16);
  padding:22px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:#8EA3C0;
}
.footer-bottom a{color:#8EA3C0;}
.footer-bottom a:hover{color:#fff;}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  width:56px;
  height:56px;
  border-radius:50%;
  background:var(--brand-600);
  color:#fff;
  border:0;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:var(--sh-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,background-color .25s ease;
  z-index:1040;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--brand-700);}

/* ---------- offcanvas ---------- */
.offcanvas{--bs-offcanvas-width:82vw;background:#fff;}
.offcanvas-header{
  border-bottom:1px solid var(--line);
  padding:16px 20px;
}
.offcanvas-body{padding:12px 20px;}
.drawer-link{
  display:flex;
  align-items:center;
  height:48px;
  font-size:16px;
  font-weight:500;
  color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.drawer-link.is-active{color:var(--brand-600);font-weight:600;}
.drawer-link:hover{color:var(--brand-600);}
.offcanvas-footer{padding:20px;border-top:1px solid var(--line);}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .stats-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991.98px){
  :root{--section-y:64px;}
  .nav-links{display:none;}
  .nav-toggle{display:flex;}
  .nav-actions .btn-brand{display:none;}
  .hero{padding:56px 0 64px;}
  .hero-visual{margin-top:36px;}
  .bento-card,.bento-list,.review-card,.news-lead-body{padding:24px;}
  .news-lead{grid-template-columns:1fr;}
  .news-lead-media img{aspect-ratio:16/9;}
  .news-mini-grid{grid-template-columns:1fr;}
  .dl-grid{grid-template-columns:1fr;}
  .reviews-grid{grid-template-columns:1fr;}
  .reviews-col--offset{margin-top:0;}
  .cta-inner{padding:32px;}
  .carousel-control-prev{left:24px;}
  .carousel-control-next{right:24px;}
}
@media (max-width:767.98px){
  .hero-actions .btn-brand,
  .hero-actions .btn-outline-brand,
  .hero-actions .btn-ghost{width:100%;}
  .cta-inner .btn-white{width:100%;}
  .hero-float{left:14px;bottom:-16px;padding:10px 14px;min-width:150px;}
  .stats-grid{grid-template-columns:1fr;}
  .table-wrap{overflow-x:auto;}
  .spec-table{min-width:680px;}
  .reviews-grid{
    display:flex;
    gap:16px;
    overflow-x:auto;
    scroll-snap-type:x mandatory;
    padding-bottom:8px;
    -webkit-overflow-scrolling:touch;
  }
  .reviews-col{display:contents;}
  .review-card{
    flex:0 0 84vw;
    scroll-snap-align:start;
  }
  .shot img{aspect-ratio:3/4;}
  .carousel-control-prev,
  .carousel-control-next{bottom:auto;top:calc(50% - 20px);width:36px;height:36px;}
}
@media (max-width:575.98px){
  :root{--section-y:52px;}
  body{font-size:15px;}
  .nav-inner{height:60px;}
  .brand-text{font-size:16px;}
  .bento-card,.bento-list,.review-card,.news-mini,.stat-card{padding:20px;}
  .news-lead-body{padding:20px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: article */
:root{
  --brand-600:#1D5BD6;
  --brand-700:#1449AE;
  --brand-500:#3D7BF0;
  --brand-100:#E8F0FE;
  --accent-500:#FF7A2F;
  --accent-100:#FFEADF;
  --ink-900:#0E1B2E;
  --ink-700:#2A3A52;
  --ink-600:#55647C;
  --ink-400:#8A97AB;
  --line:#E4E9F2;
  --bg:#F5F8FD;
  --surface:#FFFFFF;
  --ok:#12A150;
  --footer-bg:#0C1C33;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-xl:22px;
  --sh-1:0 6px 18px rgba(17,42,84,.06);
  --sh-2:0 12px 30px rgba(17,42,84,.10);
  --section-y:88px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-700);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Inter,Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent-500);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:-0.01em;}
p{margin:0 0 1em;}
ul,ol{margin:0 0 1em;padding-left:1.3em;}
::selection{background:var(--brand-100);color:var(--ink-900);}
:focus-visible{outline:3px solid rgba(29,91,214,.28);outline-offset:2px;border-radius:6px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1440px){.container{max-width:1280px;}}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:68px;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink-900);}
.brand:hover{color:var(--ink-900);}
.brand-mark{
  width:24px;height:24px;border-radius:8px;background:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;color:#fff;flex:0 0 24px;
}
.brand-mark svg{width:15px;height:15px;}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-0.01em;}
.nav-links{
  display:flex;align-items:center;gap:28px;list-style:none;margin:0;padding:0;
}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:15px;
  font-weight:500;
  color:var(--ink-700);
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;border-radius:2px;
  background:var(--brand-600);transition:width .22s ease;
}
.nav-links a:hover{color:var(--brand-600);}
.nav-links a:hover::after{width:100%;}
.nav-links a.is-active{color:var(--brand-600);font-weight:700;}
.nav-links a.is-active::after{width:100%;}
.nav-actions{display:flex;align-items:center;gap:12px;}
.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 28px;border-radius:999px;border:1px solid var(--brand-600);
  background:var(--brand-600);color:#fff;font-size:15px;font-weight:600;
  line-height:1;cursor:pointer;transition:all .2s ease;
}
.btn-brand:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;box-shadow:var(--sh-2);}
.btn-brand:active{transform:scale(.98);}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:12px;
  padding:0;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-700);border-radius:2px;}

.nav-drawer{width:82vw !important;max-width:340px;background:#fff;border-left:1px solid var(--line);}
.nav-drawer .offcanvas-header{padding:18px 20px;border-bottom:1px solid var(--line);}
.drawer-title{font-weight:800;color:var(--ink-900);font-size:17px;}
.nav-drawer .offcanvas-body{padding:12px 12px 20px;display:flex;flex-direction:column;gap:4px;}
.drawer-link{
  display:flex;align-items:center;height:48px;padding:0 14px;border-radius:var(--r-sm);
  color:var(--ink-700);font-size:15px;font-weight:500;
}
.drawer-link:hover{background:var(--brand-100);color:var(--brand-700);}
.drawer-link.is-active{color:var(--brand-600);font-weight:700;box-shadow:inset 3px 0 0 var(--brand-600);}
.drawer-footer{padding:16px 20px 24px;border-top:1px solid var(--line);}
.drawer-footer .btn-brand{width:100%;}

/* ============ 阅读进度 ============ */
.read-progress{
  position:fixed;top:0;left:0;height:3px;width:0;background:var(--accent-500);z-index:1080;
  transition:width .1s linear;
}

/* ============ 面包屑 ============ */
.crumb-bar{background:var(--surface);border-bottom:1px solid var(--line);}
.crumb{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  padding:16px 0;font-size:13px;color:var(--ink-400);
}
.crumb a{color:var(--ink-600);}
.crumb a:hover{color:var(--brand-600);text-decoration:underline;}
.crumb .sep{color:var(--ink-400);}
.crumb .current{max-width:360px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink-700);}

/* ============ 文章头 ============ */
.article-hero{
  background:var(--surface);
  border-bottom:1px solid var(--line);
  padding:52px 0 40px;
}
.article-hero-inner{max-width:800px;margin:0 auto;}
.badge-cate{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:999px;background:var(--brand-100);color:var(--brand-600);
  font-size:12px;font-weight:600;line-height:1.6;margin-bottom:18px;
}
.article-title{
  font-size:clamp(28px,3.6vw,40px);
  line-height:1.25;
  font-weight:800;
  letter-spacing:-0.02em;
  margin-bottom:18px;
}
.article-meta{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-400);
  padding-top:16px;border-top:1px solid var(--line);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line);display:inline-block;}

/* ============ 正文布局 ============ */
.article-section{padding:56px 0 var(--section-y);}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start;}
.article-body{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  padding:40px 44px;
  box-shadow:var(--sh-1);
  font-size:17px;
  line-height:1.9;
  color:var(--ink-700);
  word-wrap:break-word;
  overflow-wrap:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;font-size:17px;line-height:1.9;}
.article-body h2{
  font-size:23px;font-weight:700;line-height:1.4;color:var(--ink-900);
  margin:2em 0 .8em;padding-left:14px;border-left:4px solid var(--brand-600);
}
.article-body h3{font-size:19px;font-weight:700;margin:1.6em 0 .6em;color:var(--ink-900);}
.article-body h4{font-size:17px;font-weight:600;margin:1.4em 0 .5em;}
.article-body ul,.article-body ol{padding-left:1.35em;margin:0 0 1.2em;}
.article-body li{margin-bottom:.5em;line-height:1.85;}
.article-body ul li::marker{color:var(--brand-600);}
.article-body ol li::marker{color:var(--brand-600);font-weight:700;}
.article-body img{border-radius:12px;margin:26px auto;box-shadow:var(--sh-1);}
.article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--accent-500);}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--bg);
  border-left:4px solid var(--accent-500);border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--ink-600);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body table{
  width:100%;border-collapse:collapse;font-size:15px;margin:0;
}
.article-body .table-wrap{
  overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);margin:24px 0;
}
.article-body thead th{
  background:var(--brand-100);color:var(--ink-900);font-weight:600;
  padding:12px 16px;text-align:left;white-space:nowrap;border-bottom:1px solid var(--line);
}
.article-body tbody td{padding:12px 16px;border-bottom:1px solid var(--line);color:var(--ink-700);}
.article-body tbody tr:nth-child(even){background:var(--bg);}
.article-body tbody tr:last-child td{border-bottom:none;}
.article-body pre{
  background:#0C1C33;color:#DCE7F7;padding:18px 20px;border-radius:var(--r-md);
  overflow-x:auto;font-size:14px;line-height:1.7;margin:24px 0;
}
.article-body code{
  background:var(--brand-100);color:var(--brand-700);padding:2px 6px;border-radius:6px;font-size:.92em;
}
.article-body pre code{background:none;color:inherit;padding:0;}
.article-body hr{border:none;border-top:1px solid var(--line);margin:32px 0;}

.empty-state{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;text-align:center;border:1px dashed var(--line);border-radius:var(--r-lg);
  background:var(--surface);padding:40px 20px;color:var(--ink-600);
}
.empty-state svg{width:64px;height:64px;stroke:var(--ink-400);}

/* ============ 侧栏 ============ */
.side-col{display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:22px 22px 18px;box-shadow:var(--sh-1);
}
.side-card.is-sticky{position:sticky;top:92px;}
.side-title{
  font-size:14px;font-weight:700;color:var(--ink-900);margin-bottom:14px;
  display:flex;align-items:center;gap:8px;
}
.side-title::before{content:"";width:4px;height:14px;border-radius:2px;background:var(--brand-600);}
.toc-list{list-style:none;margin:0;padding:0;max-height:340px;overflow-y:auto;}
.toc-list li{margin-bottom:2px;}
.toc-list a{
  display:block;padding:8px 10px;border-radius:var(--r-sm);font-size:14px;color:var(--ink-600);
  line-height:1.5;border-left:3px solid transparent;
}
.toc-list a:hover{background:var(--bg);color:var(--brand-600);}
.toc-list a.is-current{color:var(--brand-600);font-weight:600;border-left-color:var(--brand-600);background:var(--brand-100);}
.toc-list .lv3 a{padding-left:24px;font-size:13px;}
.toc-placeholder{
  height:1em;background:var(--line);border-radius:4px;margin-bottom:10px;
}
.side-links{display:flex;flex-direction:column;gap:10px;}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  font-size:14px;color:var(--ink-600);padding:9px 12px;border-radius:var(--r-sm);background:var(--bg);
}
.side-links a:hover{background:var(--brand-100);color:var(--brand-700);}
.side-links a::after{content:"→";font-size:13px;color:var(--brand-500);}

/* ============ 文末标签 / 上下篇 ============ */
.article-foot{margin-top:36px;}
.tag-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:28px;}
.tag-label{font-size:13px;color:var(--ink-400);}
.tag{
  display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;
  background:var(--brand-100);color:var(--brand-600);font-size:13px;font-weight:500;
  border:1px solid transparent;transition:all .2s ease;
}
.tag:hover{background:var(--brand-600);color:#fff;border-color:var(--brand-600);}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.post-nav-card{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px 22px;box-shadow:var(--sh-1);transition:all .25s ease;
}
.post-nav-card:hover{box-shadow:var(--sh-2);transform:translateY(-4px);border-color:var(--brand-500);}
.pn-label{display:block;font-size:12px;color:var(--ink-400);margin-bottom:6px;}
.pn-title{display:block;font-size:15px;font-weight:600;color:var(--ink-900);line-height:1.55;}
.post-nav-card:hover .pn-title{color:var(--brand-600);}

/* ============ 相关推荐 ============ */
.related-section{padding:0 0 var(--section-y);}
.sec-head{margin-bottom:32px;}
.sec-head h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;}
.sec-head p{margin-top:10px;color:var(--ink-600);font-size:15px;}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.rel-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);transition:all .25s ease;height:100%;
}
.rel-card:hover{box-shadow:var(--sh-2);transform:translateY(-4px);border-color:var(--brand-500);}
.rel-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg);}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.rel-card:hover .rel-thumb img{transform:scale(1.04);}
.rel-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-cate{
  align-self:flex-start;padding:4px 12px;border-radius:999px;background:var(--brand-100);
  color:var(--brand-600);font-size:12px;font-weight:600;
}
.rel-title{font-size:17px;font-weight:700;line-height:1.5;color:var(--ink-900);}
.rel-card:hover .rel-title{color:var(--brand-600);}
.rel-desc{font-size:14px;color:var(--ink-600);line-height:1.75;margin:0;}
.rel-time{font-size:13px;color:var(--ink-400);margin-top:auto;}

.back-row{display:flex;justify-content:center;margin-top:36px;}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--brand-600);
}
.link-arrow::after{content:"→";transition:transform .2s ease;}
.link-arrow:hover::after{transform:translateX(3px);}

/* ============ 底部 CTA ============ */
.cta-band{padding:0 0 var(--section-y);}
.cta-inner{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);
  padding:40px 44px;box-shadow:var(--sh-1);
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;margin-bottom:8px;}
.cta-inner p{margin:0;color:var(--ink-600);font-size:15px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}
.btn-outline{
  display:inline-flex;align-items:center;justify-content:center;
  padding:13px 28px;border-radius:999px;border:1.5px solid var(--brand-500);
  background:#fff;color:var(--brand-600);font-size:15px;font-weight:600;line-height:1;
  transition:all .2s ease;cursor:pointer;
}
.btn-outline:hover{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-600);}
.btn-outline:active{transform:scale(.98);}

/* ============ 页脚 ============ */
.site-footer{background:var(--footer-bg);color:#C9D6E8;padding:64px 0 0;}
.footer-grid{row-gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;color:#fff;}
.footer-brand .brand-mark{background:var(--brand-500);}
.footer-brand .brand-text{color:#fff;font-size:17px;font-weight:800;}
.footer-desc{font-size:14px;line-height:1.8;color:#C9D6E8;max-width:34em;}
.footer-title{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{font-size:14px;color:#C9D6E8;position:relative;display:inline-block;width:fit-content;}
.footer-links a::after{
  content:"";position:absolute;left:0;bottom:-2px;height:2px;width:0;background:var(--accent-500);
  border-radius:2px;transition:width .2s ease;
}
.footer-links a:hover{color:#fff;}
.footer-links a:hover::after{width:100%;}
.footer-support p{font-size:14px;line-height:1.8;color:#C9D6E8;margin-bottom:12px;}
.footer-support strong{color:#fff;font-weight:600;}
.footer-bottom{
  margin-top:48px;padding:22px 0;border-top:1px solid rgba(201,214,232,.16);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:#93A6BF;
}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:28px;width:56px;height:56px;border-radius:50%;
  background:var(--brand-600);color:#fff;border:none;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all .25s ease;z-index:1050;
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--brand-700);}
.to-top svg{width:20px;height:20px;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .article-grid{grid-template-columns:minmax(0,1fr) 290px;gap:32px;}
}
@media (max-width:991px){
  :root{--section-y:64px;}
  .nav-links{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-actions .btn-brand{display:none;}
  .article-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .side-card.is-sticky{position:static;}
  .side-col{order:2;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .article-body{padding:32px 28px;}
  .article-hero{padding:40px 0 32px;}
}
@media (max-width:767px){
  :root{--section-y:52px;}
  .container{padding-left:18px;padding-right:18px;}
  .nav-inner{height:60px;}
  .brand-text{font-size:16px;}
  .article-body{padding:24px 20px;font-size:16px;}
  .article-body p{font-size:16px;}
  .article-body h2{font-size:20px;}
  .article-body h3{font-size:18px;}
  .article-hero{padding:32px 0 26px;}
  .article-section{padding:28px 0 var(--section-y);}
  .post-nav{grid-template-columns:1fr;}
  .related-grid{grid-template-columns:1fr;}
  .cta-inner{padding:28px 22px;flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn-brand,.cta-actions .btn-outline{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .to-top{right:16px;bottom:18px;width:48px;height:48px;}
}
@media (max-width:575px){
  .article-title{font-size:24px;}
  .article-meta{gap:10px;}
  .badge-cate{font-size:11px;}
  .crumb .current{max-width:180px;}
  .rel-body{padding:16px 18px 20px;}
  .side-card{padding:18px;}
}

/* roulang page: category1 */
:root{
  --brand-600:#1D5BD6;
  --brand-700:#1449AE;
  --brand-500:#3D7BF0;
  --brand-100:#E8F0FE;
  --accent-500:#FF7A2F;
  --accent-100:#FFEADF;
  --ink-900:#0E1B2E;
  --ink-700:#2A3A52;
  --ink-600:#55647C;
  --ink-400:#8A97AB;
  --line:#E4E9F2;
  --bg:#F5F8FD;
  --surface:#FFFFFF;
  --ok:#12A150;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-xl:22px;
  --sh-1:0 6px 18px rgba(17,42,84,.06);
  --sh-2:0 12px 30px rgba(17,42,84,.10);
  --section-y:88px;
  --container:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,Inter,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--ink-700);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{margin:0;color:var(--ink-900);font-weight:700}
h1{font-size:clamp(30px,4.6vw,52px);line-height:1.15;font-weight:800;letter-spacing:-0.02em}
h2{font-size:clamp(24px,2.8vw,36px);line-height:1.25;font-weight:700}
h3{font-size:20px;line-height:1.4;font-weight:700}
h4{font-size:17px;line-height:1.5;font-weight:600}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-700)}
img{max-width:100%;height:auto;display:block}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(29,91,214,.28);outline-offset:2px}
::selection{background:var(--brand-100);color:var(--ink-900)}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.container-fluid{padding-left:24px;padding-right:24px}
@media (min-width:1200px){.container{max-width:1200px}}
@media (min-width:1440px){.container{max-width:1280px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1)}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:68px;
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand-mark{
  width:24px;height:24px;
  border-radius:8px;
  background:var(--brand-600);
  color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  flex:0 0 24px;
}
.brand-mark svg{width:15px;height:15px}
.brand-text{
  font-size:17px;
  font-weight:800;
  color:var(--ink-900);
  letter-spacing:-0.01em;
  white-space:nowrap;
}
.nav-links{display:flex;align-items:center;gap:28px;margin:0}
.nav-links a{
  position:relative;
  display:inline-block;
  font-size:15px;
  font-weight:500;
  color:var(--ink-700);
  padding:6px 0;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  border-radius:2px;
  background:var(--brand-600);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s ease;
}
.nav-links a:hover{color:var(--brand-600)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--brand-600);font-weight:700}
.nav-links a.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:14px}
.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;
  padding:13px 28px;
  border-radius:999px;
  background:var(--brand-600);
  color:#fff;
  font-size:15px;
  font-weight:600;
  border:none;
  line-height:1.2;
  transition:background .22s ease,box-shadow .22s ease,transform .15s ease;
  white-space:nowrap;
}
.btn-brand:hover{background:var(--brand-700);color:#fff;box-shadow:var(--sh-2)}
.btn-brand:active{transform:scale(.98)}
.btn-outline-brand{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 26px;
  border-radius:999px;
  background:#fff;
  border:1.5px solid var(--brand-500);
  color:var(--brand-600);
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  transition:background .22s ease,transform .15s ease;
  white-space:nowrap;
}
.btn-outline-brand:hover{background:var(--brand-100);color:var(--brand-700)}
.btn-outline-brand:active{transform:scale(.98)}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--brand-600);
}
.link-arrow span{transition:transform .22s ease}
.link-arrow:hover span{transform:translateX(3px)}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--line);
  border-radius:12px;
  background:#fff;
  padding:0;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-700)}
.nav-toggle:hover{border-color:var(--brand-500);background:var(--brand-100)}

/* drawer */
.nav-drawer{width:82vw !important;max-width:340px;border:none;background:#fff !important}
.nav-drawer .offcanvas-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 22px;border-bottom:1px solid var(--line);
}
.drawer-close{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);
  background:#fff;color:var(--ink-700);font-size:20px;line-height:1;cursor:pointer;
}
.drawer-close:hover{background:var(--brand-100);color:var(--brand-700)}
.nav-drawer .offcanvas-body{padding:14px 22px 26px;display:flex;flex-direction:column;gap:4px}
.nav-drawer .offcanvas-body a{
  display:flex;align-items:center;
  min-height:48px;
  font-size:16px;font-weight:500;color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.nav-drawer .offcanvas-body a.is-active{color:var(--brand-600);font-weight:700}
.nav-drawer .offcanvas-body .drawer-cta{
  justify-content:center;
  margin-top:20px;
  min-height:auto;
  color:#fff;
  border-bottom:none;
  background:var(--brand-600);
}
.nav-drawer .offcanvas-body .drawer-cta:hover{background:var(--brand-700);color:#fff}

/* ---------- page head ---------- */
.page-head{
  position:relative;
  overflow:hidden;
  background:var(--bg);
  border-bottom:1px solid var(--line);
  padding:48px 0 44px;
}
.page-head::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(29,91,214,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(29,91,214,.055) 1px,transparent 1px);
  background-size:38px 38px;
  pointer-events:none;
}
.page-head::after{
  content:"";
  position:absolute;
  right:-14%;bottom:-60%;
  width:58%;height:200%;
  background:linear-gradient(112deg,rgba(29,91,214,.06),rgba(29,91,214,0) 62%);
  transform:skewX(-12deg);
  pointer-events:none;
}
.page-head .container{position:relative;z-index:1;max-width:1200px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-400);margin-bottom:18px}
.crumbs a{color:var(--ink-600)}
.crumbs a:hover{color:var(--brand-600)}
.crumbs .sep{color:var(--ink-400)}
.crumbs .current{color:var(--ink-900);font-weight:500}
.page-head h1{max-width:880px;margin-bottom:16px}
.page-head .lead{
  max-width:720px;
  font-size:17px;
  color:var(--ink-600);
  margin-bottom:22px;
}
.head-chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;
  border-radius:999px;
  background:var(--surface);
  border:1px solid var(--line);
  font-size:12px;
  font-weight:500;
  color:var(--ink-600);
}
.chip.brand{background:var(--brand-100);border-color:transparent;color:var(--brand-600);font-weight:600}
.chip .dot{width:6px;height:6px;border-radius:50%;background:var(--ok);display:inline-block}

/* ---------- sections ---------- */
.section{padding:var(--section-y) 0}
.section-tight{padding:58px 0}
.section-surface{background:var(--surface)}
.sec-head{max-width:720px;margin-bottom:44px}
.sec-head h2{margin-bottom:14px}
.sec-head p{color:var(--ink-600);font-size:16px;margin:0}
.eyebrow{
  display:inline-block;
  font-size:13px;font-weight:600;
  letter-spacing:.04em;
  color:var(--brand-600);
  background:var(--brand-100);
  border-radius:999px;
  padding:5px 14px;
  margin-bottom:14px;
}
.h2-bar{position:relative;padding-left:16px}
.h2-bar::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:4px;background:var(--brand-600);
}

/* ---------- bento ---------- */
.bento-card{
  position:relative;
  height:100%;
  background:var(--surface);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:26px;
  border-top:3px solid transparent;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  display:flex;
  flex-direction:column;
}
.bento-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-top-color:var(--brand-500)}
.bento-wide{flex-direction:row;gap:22px;align-items:flex-start}
.bento-wide .bento-text{flex:1 1 auto;min-width:0}
.bento-wide .bento-thumb{
  flex:0 0 176px;
  width:176px;
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.bento-wide .bento-thumb img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.icon-badge{
  width:44px;height:44px;
  border-radius:12px;
  background:var(--brand-100);
  color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;
  margin-bottom:16px;
  flex:0 0 44px;
}
.icon-badge svg{width:24px;height:24px;stroke-width:1.75;fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round}
.bento-card h3{margin-bottom:10px}
.bento-card p{font-size:15px;color:var(--ink-600);margin-bottom:16px}
.mini-list{margin-top:auto}
.mini-list li{
  position:relative;
  padding-left:16px;
  font-size:14px;
  color:var(--ink-700);
  line-height:1.7;
}
.mini-list li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:6px;height:6px;border-radius:50%;background:var(--brand-500);
}
.mini-list li + li{margin-top:4px}

/* ---------- split rows ---------- */
.split-row + .split-row{margin-top:76px}
.split-text h2{margin-bottom:16px}
.split-text p{color:var(--ink-600);font-size:16px;margin-bottom:20px}
.point-list{margin-bottom:22px}
.point-list li{
  position:relative;
  padding-left:30px;
  font-size:15px;
  color:var(--ink-700);
  line-height:1.75;
}
.point-list li + li{margin-top:14px}
.point-list li svg{
  position:absolute;left:0;top:.28em;
  width:18px;height:18px;
  stroke:var(--ok);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;
}
.split-media{
  border-radius:var(--r-xl);
  overflow:hidden;
  box-shadow:var(--sh-2);
  background:var(--surface);
}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover}

/* ---------- compare table ---------- */
.cmp-shell{
  background:var(--surface);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.cmp-scroll{overflow-x:auto}
table.cmp{
  width:100%;
  min-width:620px;
  border-collapse:collapse;
  margin:0;
}
table.cmp caption{
  caption-side:top;
  text-align:left;
  padding:20px 24px 6px;
  font-size:13px;
  color:var(--ink-400);
}
table.cmp th,table.cmp td{
  text-align:left;
  padding:0 24px;
  height:48px;
  vertical-align:middle;
  font-size:15px;
  border:none;
}
table.cmp thead th{
  background:var(--brand-100);
  color:var(--ink-900);
  font-weight:700;
  font-size:14px;
  height:48px;
}
table.cmp tbody td{border-top:1px solid var(--line);color:var(--ink-700)}
table.cmp tbody tr:nth-child(even){background:var(--bg)}
table.cmp tbody td:first-child{font-weight:600;color:var(--ink-900)}
.tag{
  display:inline-block;
  padding:3px 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  background:var(--brand-100);
  color:var(--brand-600);
}
.tag.muted{background:#EEF2F8;color:var(--ink-600)}
.compare-note{
  margin-top:16px;
  font-size:13px;
  color:var(--ink-400);
}

/* ---------- faq ---------- */
.faq-shell{
  background:var(--surface);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.faq-acc .accordion-item{
  border:none;
  border-bottom:1px solid var(--line);
  background:transparent;
}
.faq-acc .accordion-item:last-child{border-bottom:none}
.faq-acc .accordion-button{
  background:transparent;
  color:var(--ink-900);
  font-size:16px;
  font-weight:600;
  padding:20px 24px;
  box-shadow:none;
  border-radius:0;
  line-height:1.5;
}
.faq-acc .accordion-button:not(.collapsed){
  color:var(--brand-600);
  background:var(--brand-100);
  box-shadow:inset 3px 0 0 var(--brand-600);
}
.faq-acc .accordion-button:focus{box-shadow:inset 3px 0 0 var(--brand-600);border:none}
.faq-acc .accordion-button::after{
  width:14px;height:14px;background-size:14px;
  filter:invert(31%) sepia(84%) saturate(2263%) hue-rotate(210deg) brightness(88%) contrast(92%);
}
.faq-acc .accordion-body{
  padding:4px 24px 24px;
  font-size:15px;
  line-height:1.8;
  color:var(--ink-600);
  max-width:62em;
}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--surface);
  border-radius:var(--r-xl);
  box-shadow:var(--sh-1);
  padding:40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  border-left:4px solid var(--brand-600);
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:10px}
.cta-band p{color:var(--ink-600);font-size:15px;margin:0;max-width:60ch}
.cta-band .cta-actions{display:flex;gap:12px;flex:0 0 auto}

/* ---------- footer ---------- */
.site-footer{
  background:#0C1C33;
  color:#C9D6E8;
  padding:64px 0 0;
  margin-top:0;
}
.footer-grid{gap:32px 0}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{width:24px;height:24px;border-radius:8px;background:var(--brand-600)}
.footer-brand .brand-text{color:#fff;font-size:17px;font-weight:800}
.footer-desc{font-size:14px;line-height:1.8;color:#C9D6E8;max-width:36ch}
.footer-title{font-size:14px;font-weight:600;color:#fff;margin-bottom:18px}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a{
  font-size:14px;
  color:#C9D6E8;
  text-decoration:none;
  width:fit-content;
  border-bottom:2px solid transparent;
  padding-bottom:1px;
  transition:color .2s ease,border-color .2s ease;
}
.footer-links a:hover{color:#fff;border-bottom-color:var(--accent-500)}
.footer-support p{font-size:14px;line-height:1.8;color:#C9D6E8;margin-bottom:12px}
.footer-support strong{color:#fff;font-weight:600}
.footer-bottom{
  margin-top:48px;
  border-top:1px solid rgba(201,214,232,.16);
  padding:20px 0 26px;
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  font-size:13px;
  color:#8FA4C0;
}

/* ---------- to top ---------- */
.to-top{
  position:fixed;
  right:24px;bottom:24px;
  width:56px;height:56px;
  border-radius:50%;
  border:none;
  background:var(--brand-600);
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);
  opacity:0;pointer-events:none;
  transition:opacity .25s ease,transform .25s ease,background .2s ease;
  z-index:1040;
  cursor:pointer;
}
.to-top.is-visible{opacity:1;pointer-events:auto}
.to-top:hover{background:var(--brand-700);transform:translateY(-3px)}
.to-top svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ---------- bootstrap overrides ---------- */
.btn{border-radius:999px;font-weight:600;padding:12px 26px;font-size:15px;box-shadow:none}
.btn:focus,.btn:active{box-shadow:0 0 0 3px rgba(29,91,214,.28)}
.card{border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);background:var(--surface)}
.badge{border-radius:999px;font-weight:600;padding:5px 12px;font-size:12px}
.badge-brand{background:var(--brand-100);color:var(--brand-600)}
.navbar{background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);box-shadow:none;padding:0}
.carousel-indicators [data-bs-target]{width:8px;height:8px;border-radius:999px;background:var(--ink-400);opacity:.5}
.carousel-indicators .active{width:24px;background:var(--accent-500);opacity:1}
.form-control{border:1px solid var(--line);border-radius:var(--r-sm);height:46px;font-size:15px;color:var(--ink-900)}
.form-control:focus{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(29,91,214,.18)}
.dropdown-menu{border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);padding:8px}
.dropdown-item{border-radius:var(--r-sm);font-size:15px;color:var(--ink-700);padding:9px 14px}
.dropdown-item:hover{background:var(--brand-100);color:var(--brand-700)}

/* ---------- responsive ---------- */
@media (min-width:992px) and (max-width:1199px){
  .section{padding:64px 0}
  :root{--section-y:64px}
}
@media (max-width:991px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .nav-actions .btn-brand{display:none}
  .nav-inner{height:60px}
  .section{padding:64px 0}
  .page-head{padding:38px 0 34px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px}
  .cta-band .cta-actions{width:100%}
}
@media (max-width:767px){
  .container{padding-left:18px;padding-right:18px}
  .section{padding:52px 0}
  .page-head{padding:32px 0 30px}
  .bento-card{padding:20px}
  .bento-wide{flex-direction:column}
  .bento-wide .bento-thumb{width:100%;flex:0 0 auto}
  .bento-wide .bento-thumb img{aspect-ratio:16/9}
  .cta-band .cta-actions{flex-direction:column}
  .cta-band .cta-actions .btn-brand,
  .cta-band .cta-actions .btn-outline-brand{width:100%}
  .split-row + .split-row{margin-top:56px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:575px){
  body{font-size:15px}
  h1{font-size:30px}
  .page-head .lead{font-size:15.5px}
  .sec-head h2{font-size:24px}
  .bento-card h3{font-size:18px}
  .to-top{right:16px;bottom:16px;width:48px;height:48px}
}

/* roulang page: category2 */
/* ================= 设计变量 ================= */
:root{
  --brand-600:#1D5BD6;
  --brand-700:#1449AE;
  --brand-500:#3D7BF0;
  --brand-100:#E8F0FE;
  --accent-500:#FF7A2F;
  --accent-100:#FFEADF;
  --ink-900:#0E1B2E;
  --ink-700:#2A3A52;
  --ink-600:#55647C;
  --ink-400:#8A97AB;
  --line:#E4E9F2;
  --bg:#F5F8FD;
  --surface:#FFFFFF;
  --ok:#12A150;
  --danger:#D9483B;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-xl:22px;
  --sh-1:0 6px 18px rgba(17,42,84,.06);
  --sh-2:0 12px 30px rgba(17,42,84,.10);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,Inter,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --section-y:88px;
}

/* ================= 基础 reset ================= */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .22s ease}
a:hover{color:var(--accent-500)}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding-left:0;list-style:none}
button,input,textarea,select{font-family:inherit;font-size:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid rgba(29,91,214,.28);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand-100);color:var(--brand-700)}

/* ================= 容器与栅格 ================= */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:1440px){
  .container{max-width:1280px}
}
.row{--bs-gutter-x:24px;--bs-gutter-y:24px}
.section{padding-top:var(--section-y);padding-bottom:var(--section-y)}
.section--tight{padding-top:60px;padding-bottom:60px}
.section-head{margin-bottom:38px}
.section-head--center{text-align:center;max-width:760px;margin-left:auto;margin-right:auto}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--brand-600);background:var(--brand-100);
  border-radius:999px;padding:6px 14px;margin-bottom:16px;
}
h1,.h1{font-size:clamp(30px,4.6vw,52px);line-height:1.15;font-weight:800;letter-spacing:-.02em;color:var(--ink-900)}
h2,.h2{font-size:clamp(24px,2.8vw,36px);line-height:1.25;font-weight:700;color:var(--ink-900);margin-bottom:14px}
h3,.h3{font-size:20px;line-height:1.4;font-weight:700;color:var(--ink-900)}
h4,.h4{font-size:17px;line-height:1.5;font-weight:600;color:var(--ink-900)}
.lead{font-size:17px;line-height:1.8;color:var(--ink-600)}
.text-muted-ink{color:var(--ink-600)}
.small-note{font-size:13.5px;line-height:1.6;color:var(--ink-400)}

/* ================= 按钮 ================= */
.btn-brand,
.btn-outline-brand,
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;
  font-weight:600;
  font-size:15px;
  line-height:1;
  text-align:center;
  transition:background-color .25s ease,color .25s ease,box-shadow .25s ease,transform .25s ease,border-color .25s ease;
  white-space:nowrap;
}
.btn-brand{
  background:var(--brand-600);color:#fff;
  padding:14px 28px;border:1px solid var(--brand-600);
  box-shadow:var(--sh-1);
}
.btn-brand:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;box-shadow:var(--sh-2);transform:translateY(-2px)}
.btn-brand:active{transform:scale(.98)}
.btn-outline-brand{
  background:#fff;color:var(--brand-600);
  border:1.5px solid var(--brand-500);
  padding:13px 26px;
}
.btn-outline-brand:hover{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-600);transform:translateY(-2px);box-shadow:var(--sh-1)}
.btn-outline-brand:active{transform:scale(.98)}
.btn-ghost{
  background:transparent;color:var(--brand-600);border:0;padding:6px 0;
}
.btn-ghost svg{transition:transform .25s ease}
.btn-ghost:hover{color:var(--brand-700)}
.btn-ghost:hover svg{transform:translateX(3px)}
.btn-brand[disabled],.btn-outline-brand[disabled]{opacity:.5;pointer-events:none}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* ================= 导航 ================= */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1)}
.nav-inner{
  height:68px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink-900)}
.brand:hover{color:var(--ink-900)}
.brand-mark{
  width:24px;height:24px;border-radius:8px;background:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;color:#fff;flex:0 0 auto;
}
.brand-mark svg{width:15px;height:15px}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--ink-900)}
.nav-links{display:flex;align-items:center;gap:28px;margin:0}
.nav-links a{
  position:relative;display:inline-block;
  font-size:15px;font-weight:500;color:var(--ink-700);
  padding:6px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--brand-600);transform:scaleX(0);transform-origin:left;
  transition:transform .25s ease;
}
.nav-links a:hover{color:var(--brand-600)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--brand-600);font-weight:700}
.nav-links a.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:14px}
.nav-actions .btn-brand{padding:11px 22px;font-size:14.5px}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);background:#fff;
  border-radius:var(--r-sm);flex-direction:column;justify-content:center;align-items:center;gap:4px;
}
.nav-toggle span{display:block;width:16px;height:2px;border-radius:2px;background:var(--ink-900)}
.nav-toggle:hover{border-color:var(--brand-500)}

/* 移动抽屉 */
.offcanvas.drawer{width:82vw;max-width:340px;border:0;background:#fff}
.drawer .offcanvas-header{
  padding:18px 20px;border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
}
.drawer .offcanvas-body{padding:14px 20px 26px;display:flex;flex-direction:column;gap:4px}
.drawer-link{
  display:flex;align-items:center;height:48px;padding:0 12px;
  border-radius:var(--r-sm);font-size:15.5px;font-weight:500;color:var(--ink-700);
}
.drawer-link:hover{background:var(--brand-100);color:var(--brand-600)}
.drawer-link.is-active{color:var(--brand-600);font-weight:700;background:var(--brand-100)}
.drawer-cta{margin-top:18px;width:100%}
.drawer .btn-close{--bs-btn-close-focus-shadow:none;opacity:.55}
.drawer .btn-close:hover{opacity:1}

/* ================= 页头 ================= */
.page-head{
  position:relative;overflow:hidden;
  background:var(--bg);
  border-bottom:1px solid var(--line);
  padding:46px 0 42px;
}
.page-head::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(135deg,rgba(29,91,214,.055) 0 1px,transparent 1px 16px);
  pointer-events:none;
}
.page-head::after{
  content:"";position:absolute;right:-140px;bottom:-160px;width:420px;height:420px;
  background:rgba(29,91,214,.05);
  clip-path:polygon(100% 0,100% 100%,0 100%);
  pointer-events:none;
}
.page-head .container{position:relative;z-index:2}
.head-grid{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:44px;align-items:center}
.crumbs{font-size:13px;color:var(--ink-400);display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:16px}
.crumbs a{color:var(--ink-600)}
.crumbs a:hover{color:var(--brand-600)}
.crumbs .sep{color:var(--ink-400)}
.page-head h1{max-width:20em}
.page-head .sub{margin-top:16px;font-size:16.5px;line-height:1.8;color:var(--ink-600);max-width:38em}
.head-platforms{display:flex;gap:14px}
.pf-tile{
  width:86px;height:86px;border-radius:var(--r-lg);background:var(--surface);
  border:1px solid var(--line);box-shadow:var(--sh-1);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  color:var(--brand-600);
  transition:transform .25s ease,box-shadow .25s ease;
}
.pf-tile:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.pf-tile span{font-size:12px;color:var(--ink-600);font-weight:500}
.pf-tile svg{width:24px;height:24px;stroke:var(--brand-600);fill:none;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}
.pf-tile--solid{background:var(--brand-600);border-color:var(--brand-600)}
.pf-tile--solid svg{stroke:#fff}
.pf-tile--solid span{color:#DCE8FF}

/* ================= 主体两栏 ================= */
.layout-wrap{padding-top:64px;padding-bottom:88px}
.side-toc{
  position:sticky;top:92px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  padding:18px 14px;
}
.toc-title{
  font-size:12.5px;font-weight:600;letter-spacing:.08em;color:var(--ink-400);
  padding:0 12px 12px;text-transform:uppercase;
}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
  position:relative;display:block;
  padding:10px 12px 10px 14px;border-radius:var(--r-sm);
  font-size:14px;color:var(--ink-600);line-height:1.5;
  transition:background-color .2s ease,color .2s ease;
}
.toc-list a:hover{background:var(--bg);color:var(--brand-600)}
.toc-list a.is-current{background:var(--brand-100);color:var(--brand-600);font-weight:600}
.toc-list a.is-current::before{
  content:"";position:absolute;left:2px;top:9px;bottom:9px;width:3px;
  border-radius:2px;background:var(--brand-600);
}
.toc-note{
  margin-top:14px;padding:14px 12px 4px;border-top:1px solid var(--line);
  font-size:13px;line-height:1.7;color:var(--ink-600);
}
.content-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--sh-1);
  padding:32px;
}
.content-card + .content-card{margin-top:24px}
.block-title{font-size:24px;font-weight:700;color:var(--ink-900);margin-bottom:8px}
.block-desc{font-size:15px;line-height:1.8;color:var(--ink-600);margin-bottom:26px}

/* 步骤流 */
.step-list{position:relative}
.step{position:relative;padding-left:78px;padding-bottom:34px}
.step:last-child{padding-bottom:0}
.step:not(:last-child)::before{
  content:"";position:absolute;left:27px;top:66px;bottom:6px;
  border-left:2px dashed var(--line);
}
.step-num{
  position:absolute;left:0;top:0;
  width:56px;height:56px;border-radius:16px;
  background:var(--brand-100);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;
  font-size:21px;font-weight:800;letter-spacing:-.02em;
}
.step h3{font-size:19px;margin-bottom:8px}
.step p{font-size:15px;line-height:1.85;color:var(--ink-600)}
.step ul{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.step ul li{
  position:relative;padding-left:18px;
  font-size:14.5px;line-height:1.75;color:var(--ink-600);
}
.step ul li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;
  background:var(--brand-500);
}
.step-tip{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:14px;padding:8px 14px;border-radius:999px;
  background:var(--accent-100);color:#B44E13;font-size:13px;font-weight:500;
}
.step-figure{margin-top:20px;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line)}
.step-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.step-figure figcaption{font-size:13px;color:var(--ink-400);padding:10px 14px;background:var(--surface);text-align:center}

/* 系统要求表 */
.table-shell{
  border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;background:var(--surface);box-shadow:var(--sh-1);
}
.table-scroll{overflow-x:auto}
table.req-table{width:100%;min-width:640px;border-collapse:collapse}
table.req-table caption{caption-side:top;text-align:left;font-size:13.5px;color:var(--ink-400);padding:0 0 12px}
table.req-table thead th{
  background:var(--brand-100);color:var(--ink-900);
  font-size:14px;font-weight:700;text-align:left;
  height:48px;padding:0 20px;white-space:nowrap;
}
table.req-table tbody td{
  height:48px;padding:0 20px;font-size:14.5px;color:var(--ink-700);
  border-top:1px solid var(--line);white-space:nowrap;
}
table.req-table tbody tr:nth-child(even){background:var(--bg)}
table.req-table tbody th{
  height:48px;padding:0 20px;font-size:14.5px;font-weight:600;color:var(--ink-900);
  text-align:left;border-top:1px solid var(--line);white-space:nowrap;
}
/* 移动端纵向卡片堆叠 */
@media (max-width:767.98px){
  .table-scroll{overflow:visible}
  table.req-table{min-width:0;display:block}
  table.req-table thead{display:none}
  table.req-table tbody{display:block}
  table.req-table tbody tr{
    display:block;background:var(--surface)!important;
    border-top:1px solid var(--line);padding:14px 4px;
  }
  table.req-table tbody tr:first-child{border-top:0}
  table.req-table tbody th,
  table.req-table tbody td{
    display:flex;justify-content:space-between;gap:16px;
    height:auto;padding:6px 18px;border-top:0;white-space:normal;
  }
  table.req-table tbody td::before{
    content:attr(data-label);font-weight:600;color:var(--ink-900);flex:0 0 auto;
  }
}

/* 下载按钮组 */
.dl-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.dl-card{
  display:flex;align-items:center;gap:18px;
  background:var(--surface);border:1.5px solid var(--brand-500);
  border-radius:var(--r-lg);padding:22px;
  transition:transform .25s ease,box-shadow .25s ease,background-color .25s ease;
}
.dl-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.dl-card--primary{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.dl-card--primary:hover{background:var(--brand-700);border-color:var(--brand-700)}
.dl-icon{
  width:52px;height:52px;border-radius:var(--r-sm);
  background:var(--brand-100);display:flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.dl-icon svg{width:26px;height:26px;stroke:var(--brand-600);fill:none;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}
.dl-card--primary .dl-icon{background:rgba(255,255,255,.16)}
.dl-card--primary .dl-icon svg{stroke:#fff}
.dl-meta{flex:1 1 auto;min-width:0}
.dl-name{font-size:17px;font-weight:700;color:var(--ink-900)}
.dl-card--primary .dl-name{color:#fff}
.dl-sub{font-size:13px;color:var(--ink-400);margin-top:4px}
.dl-card--primary .dl-sub{color:#CFE0FF}
.dl-arrow{flex:0 0 auto;color:var(--brand-600)}
.dl-card--primary .dl-arrow{color:#fff}
.dl-extra{
  display:flex;flex-wrap:wrap;align-items:center;gap:26px;
  margin-top:26px;padding-top:24px;border-top:1px solid var(--line);
}
.qr-box{
  width:120px;height:120px;border-radius:var(--r-md);border:1px solid var(--line);
  background:#fff;padding:8px;display:flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.qr-box .qr-pattern{
  width:100%;height:100%;border-radius:6px;
  background:
    linear-gradient(90deg,var(--ink-900) 25%,transparent 0 50%,var(--ink-900) 0 75%,transparent 0) 0 0/16px 16px,
    linear-gradient(90deg,transparent 25%,var(--ink-900) 0 50%,transparent 0 75%,var(--ink-900) 0) 8px 8px/16px 16px,
    repeating-linear-gradient(0deg,#fff 0 7px,#EAF0FA 7px 8px);
  opacity:.86;
}
.safety-list{display:flex;flex-direction:column;gap:10px}
.safety-list li{
  display:flex;align-items:flex-start;gap:8px;
  font-size:13px;line-height:1.65;color:var(--ink-600);
}
.safety-list svg{width:16px;height:16px;flex:0 0 auto;margin-top:3px;stroke:var(--ok);fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}

/* FAQ 手风琴 */
.faq-accordion .accordion-item{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;margin-bottom:12px;
}
.faq-accordion .accordion-item:last-child{margin-bottom:0}
.faq-accordion .accordion-button{
  background:var(--surface);color:var(--ink-900);
  font-size:16px;font-weight:600;line-height:1.6;
  padding:20px 22px;box-shadow:none;border:0;
  display:flex;align-items:center;gap:14px;
}
.faq-accordion .accordion-button::after{
  display:none;
}
.faq-chevron{
  margin-left:auto;flex:0 0 auto;width:20px;height:20px;
  transition:transform .28s ease;color:var(--ink-400);
}
.faq-accordion .accordion-button:not(.collapsed){
  color:var(--brand-600);background:var(--surface);
  box-shadow:inset 3px 0 0 0 var(--brand-600);
}
.faq-accordion .accordion-button:not(.collapsed) .faq-chevron{
  transform:rotate(180deg);color:var(--brand-600);
}
.faq-accordion .accordion-button:focus{box-shadow:inset 3px 0 0 0 var(--brand-600)}
.faq-accordion .accordion-button:hover{background:#FAFCFF}
.faq-accordion .accordion-body{
  padding:0 22px 22px 22px;
  font-size:15px;line-height:1.85;color:var(--ink-600);max-width:62em;
}

/* 联系与支持 */
.support-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:30px;height:100%;
}
.support-list{display:flex;flex-direction:column;gap:16px;margin-top:20px}
.support-list li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--ink-600);line-height:1.75}
.support-list .dot{
  width:32px;height:32px;border-radius:9px;background:var(--brand-100);
  display:flex;align-items:center;justify-content:center;flex:0 0 auto;color:var(--brand-600);
}
.support-list .dot svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.form-field{margin-bottom:16px}
.form-field label{
  display:block;font-size:13px;font-weight:500;color:var(--ink-600);margin-bottom:6px;
}
.form-control,.form-select{
  width:100%;height:46px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--r-sm);
  background:#fff;color:var(--ink-900);font-size:14.5px;
  transition:border-color .2s ease,box-shadow .2s ease;
  appearance:none;
}
textarea.form-control{height:auto;min-height:104px;padding:12px 14px;line-height:1.7;resize:vertical}
.form-control:focus,.form-select:focus{
  outline:none;border-color:var(--brand-500);
  box-shadow:0 0 0 4px rgba(61,123,240,.16);
}
.form-control.is-invalid{border-color:var(--danger)}
.form-hint{font-size:12.5px;color:var(--ink-400);margin-top:6px}
.form-feedback{
  display:none;margin-top:14px;padding:12px 16px;border-radius:var(--r-sm);
  background:rgba(18,161,80,.08);color:#0C7A3C;font-size:13.5px;line-height:1.6;
}
.form-feedback.is-visible{display:block}

/* 底部 CTA */
.cta-band{
  background:var(--brand-600);border-radius:var(--r-xl);
  padding:44px 46px;color:#fff;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  box-shadow:var(--sh-2);
}
.cta-band h2{color:#fff;margin-bottom:8px;font-size:clamp(22px,2.4vw,30px)}
.cta-band p{color:#D7E4FF;font-size:15px;line-height:1.75;max-width:44em}
.cta-band .btn-light-brand{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;color:var(--brand-700);font-weight:600;font-size:15px;
  padding:14px 30px;border-radius:999px;border:1px solid #fff;
  transition:transform .25s ease,box-shadow .25s ease,background-color .25s ease;
}
.cta-band .btn-light-brand:hover{background:var(--brand-100);color:var(--brand-700);transform:translateY(-2px);box-shadow:0 10px 26px rgba(0,0,0,.16)}
.cta-band .btn-light-brand:active{transform:scale(.98)}

/* ================= 页脚 ================= */
.site-footer{background:#0C1C33;color:#C9D6E8;margin-top:88px;padding-top:64px}
.footer-grid{--bs-gutter-y:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:var(--brand-600)}
.footer-brand .brand-text{color:#fff;font-size:17px;font-weight:800}
.footer-desc{font-size:14px;line-height:1.8;color:#9FB2CB;max-width:34em}
.footer-title{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{
  position:relative;display:inline-block;width:fit-content;
  font-size:14px;color:#C9D6E8;
}
.footer-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--accent-500);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.footer-links a:hover{color:#fff}
.footer-links a:hover::after{transform:scaleX(1)}
.footer-support p{font-size:13.5px;line-height:1.8;color:#9FB2CB;margin-bottom:12px}
.footer-support strong{color:#DCE6F5;font-weight:600}
.footer-bottom{
  margin-top:48px;padding:20px 0;border-top:1px solid rgba(255,255,255,.10);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:#8FA2BC;
}

/* 返回顶部 */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:1030;
  width:56px;height:56px;border-radius:50%;border:0;
  background:var(--brand-600);color:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s ease,background-color .25s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--brand-700)}
.to-top:active{transform:scale(.96)}
.to-top svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}

/* ================= 响应式 ================= */
@media (max-width:1199.98px){
  :root{--section-y:64px}
  .head-grid{gap:32px}
  .layout-wrap{padding-top:48px;padding-bottom:72px}
}
@media (max-width:991.98px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .nav-actions .btn-brand{display:none}
  .nav-inner{height:60px}
  .head-grid{grid-template-columns:1fr;gap:28px}
  .head-platforms{gap:12px}
  .pf-tile{width:74px;height:74px;border-radius:var(--r-md)}
  .content-card{padding:24px}
  .side-toc{
    position:sticky;top:68px;z-index:5;
    margin-bottom:24px;padding:12px;
    border-radius:0 0 var(--r-md) var(--r-md);
  }
  .toc-title{display:none}
  .toc-list{
    flex-direction:row;gap:8px;overflow-x:auto;flex-wrap:nowrap;
    padding-bottom:4px;scrollbar-width:thin;
  }
  .toc-list a{white-space:nowrap;padding:8px 14px;border:1px solid var(--line);border-radius:999px;font-size:13.5px}
  .toc-list a.is-current::before{display:none}
  .toc-list a.is-current{background:var(--brand-100);border-color:var(--brand-100)}
  .toc-note{display:none}
  .cta-band{padding:34px 28px;border-radius:var(--r-lg)}
}
@media (max-width:767.98px){
  :root{--section-y:52px}
  .container{padding-left:16px;padding-right:16px}
  .page-head{padding:32px 0 30px}
  .page-head h1{max-width:none}
  .dl-grid{grid-template-columns:1fr}
  .dl-card{padding:20px}
  .dl-extra{gap:20px}
  .step{padding-left:0;padding-bottom:30px}
  .step:not(:last-child)::before{display:none}
  .step-num{position:static;width:auto;height:auto;background:transparent;border-radius:0;font-size:26px;color:var(--brand-600);justify-content:flex-start;margin-bottom:6px}
  .step h3{margin-top:2px}
  .content-card{padding:20px;border-radius:var(--r-md)}
  .btn-row .btn-brand,.btn-row .btn-outline-brand{width:100%}
  .cta-band{flex-direction:column;align-items:flex-start}
  .cta-band .btn-light-brand{width:100%;justify-content:center}
  .footer-bottom{flex-direction:column;gap:6px}
  .to-top{right:16px;bottom:18px;width:50px;height:50px}
}
@media (max-width:575.98px){
  body{font-size:15px}
  .page-head .sub{font-size:15px}
  .pf-tile{width:64px;height:64px}
  .pf-tile svg{width:20px;height:20px}
  .footer-desc{max-width:none}
  .step-num{font-size:23px}
}