/* roulang page: index */
:root{
  --brand:#1D5FCE;
  --brand-600:#1650B4;
  --brand-soft:#EAF1FF;
  --accent:#FF7A2F;
  --accent-600:#EF6A1D;
  --teal:#00B3A4;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --line:#E6ECF5;
  --text:#1B2733;
  --muted:#5A6B7D;
  --r-card:14px;
  --r-btn:10px;
  --r-input:12px;
  --sh-1:0 2px 6px rgba(20,40,80,.05);
  --sh-2:0 12px 28px rgba(20,40,80,.10);
  --step:8px;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-600);}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
.container{width:100%;max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto;}
.section{padding:92px 0;}
.section-sm{padding:64px 0;}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--brand);background:var(--brand-soft);
  padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--teal);}
h1{font-size:clamp(30px,4.2vw,44px);line-height:1.25;font-weight:700;letter-spacing:-.01em;}
h2{font-size:clamp(24px,2.6vw,32px);line-height:1.3;font-weight:700;letter-spacing:-.01em;}
h3{font-size:20px;line-height:1.45;font-weight:600;}
.lead{font-size:17px;color:var(--muted);line-height:1.8;}
.muted{color:var(--muted);}
.small{font-size:13px;}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-.02em;}

/* ---------- buttons ---------- */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 24px;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn-x:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(29,95,206,.22);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(255,122,47,.24);}
.btn-accent:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-accent:active{transform:translateY(0);box-shadow:var(--sh-1);}
.btn-outline-x{background:var(--surface);color:var(--brand);border-color:rgba(29,95,206,.35);}
.btn-outline-x:hover{background:var(--brand-soft);color:var(--brand-600);border-color:var(--brand);transform:translateY(-1px);box-shadow:var(--sh-1);}
.btn-outline-x:active{transform:translateY(0);}
.btn-ghost{background:#EEF3FC;color:var(--brand);}
.btn-ghost:hover{background:#E2EBFA;color:var(--brand-600);}
.btn-sm-x{padding:10px 18px;font-size:14px;}
.btn-lg-x{padding:16px 30px;font-size:16px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(246,248,252,.86);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.site-header.is-stuck{
  background:#fff;
  border-bottom-color:var(--line);
  box-shadow:0 2px 14px rgba(20,40,80,.06);
}
.header-inner{display:flex;align-items:center;gap:20px;min-height:76px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--text);font-weight:700;font-size:18px;letter-spacing:-.01em;}
.brand:hover{color:var(--text);}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand) 0%,#2E77E4 100%);
  color:#fff;font-size:16px;font-weight:700;font-family:var(--mono);
}
.brand-text{white-space:nowrap;}
.search-shell{
  flex:1 1 auto;max-width:560px;margin:0 auto;
  display:flex;align-items:center;gap:0;
  background:#F2F5FA;border:1px solid transparent;
  border-radius:var(--r-input);padding:4px 4px 4px 14px;
  transition:background-color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.search-shell:focus-within{
  background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(29,95,206,.12);
}
.search-shell i{color:var(--muted);font-size:14px;}
.search-shell input{
  flex:1 1 auto;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--text);padding:9px 10px;min-width:0;
}
.search-shell input::placeholder{color:#93A2B4;}
.search-shell button{
  flex:0 0 auto;border:0;background:var(--brand);color:#fff;
  border-radius:8px;font-size:14px;font-weight:600;
  padding:9px 18px;cursor:pointer;transition:background-color .18s ease;
}
.search-shell button:hover{background:var(--brand-600);}
.search-shell button:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(29,95,206,.25);}
.main-nav{display:flex;align-items:center;gap:26px;flex:0 0 auto;}
.main-nav a{
  position:relative;font-size:15px;font-weight:500;color:var(--text);
  padding:6px 0;white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;transform:scaleX(0);
  transform-origin:left;transition:transform .22s ease;
}
.main-nav a:hover{color:var(--brand);}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1);}
.main-nav a.active{color:var(--brand);font-weight:600;}
.header-cta{flex:0 0 auto;}
.nav-toggle{
  display:none;flex:0 0 auto;width:42px;height:42px;border-radius:10px;
  border:1px solid var(--line);background:#fff;color:var(--text);
  align-items:center;justify-content:center;font-size:16px;cursor:pointer;
}
.mobile-panel{
  display:none;background:#fff;border-bottom:1px solid var(--line);
  box-shadow:0 12px 28px rgba(20,40,80,.08);
  padding:18px 0 22px;
}
.mobile-panel.open{display:block;}
.mobile-panel .search-shell{margin:0 0 16px;max-width:none;}
.mobile-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:16px;}
.mobile-nav a{
  padding:12px 4px;font-size:15px;font-weight:500;color:var(--text);
  border-bottom:1px dashed var(--line);
}
.mobile-nav a.active{color:var(--brand);font-weight:600;}
.hot-words{display:flex;flex-wrap:wrap;gap:8px;}
.hot-words a{
  font-size:13px;color:var(--brand);background:var(--brand-soft);
  border-radius:999px;padding:6px 13px;
}
.hot-words a:hover{background:#DDE8FC;}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:74px 0 84px;
  background:
    linear-gradient(180deg,rgba(246,248,252,0) 0%,rgba(246,248,252,.92) 88%,var(--bg) 100%),
    url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(100deg,#F6F8FC 0%,rgba(246,248,252,.90) 42%,rgba(246,248,252,.42) 100%);
}
.hero .container{position:relative;z-index:2;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:7px 16px;font-size:13px;font-weight:600;color:var(--brand);
  box-shadow:var(--sh-1);margin-bottom:20px;
}
.hero-tag i{color:var(--accent);}
.hero h1{margin-bottom:20px;}
.hero-sub{font-size:17px;color:var(--muted);line-height:1.8;max-width:560px;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px;}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:14px 34px;
  padding-top:24px;border-top:1px solid var(--line);
}
.hero-facts li{display:flex;flex-direction:column;gap:2px;}
.hero-facts span{font-size:12.5px;color:var(--muted);letter-spacing:.02em;}
.hero-facts strong{font-size:15px;font-weight:700;color:var(--text);}
.hero-facts strong.num{font-family:var(--mono);}
.hero-visual{position:relative;padding:0 0 26px 26px;}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:18px;box-shadow:var(--sh-2);
  border:1px solid rgba(255,255,255,.9);
}
.hero-float{
  position:absolute;left:0;bottom:0;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-2);padding:16px 20px;min-width:212px;
}
.hero-float .hf-label{font-size:12.5px;color:var(--muted);}
.hero-float .hf-value{font-size:18px;font-weight:700;color:var(--brand);font-family:var(--mono);}
.hero-float .hf-note{font-size:12.5px;color:var(--muted);margin-top:4px;}

/* ---------- download strip ---------- */
.download-strip{padding:0 0 8px;}
.strip-card{
  background:var(--surface);border:1px solid var(--line);border-radius:18px;
  box-shadow:var(--sh-1);padding:28px 30px;margin-top:-46px;position:relative;z-index:3;
}
.strip-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px;}
.strip-head h2{font-size:21px;}
.platform-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;}
.platform-btn{
  display:flex;align-items:center;gap:14px;
  border-radius:var(--r-card);padding:18px 20px;border:1px solid var(--line);
  background:#fff;color:var(--text);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.platform-btn:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(29,95,206,.3);color:var(--text);}
.platform-btn .pf-icon{
  width:44px;height:44px;flex:0 0 auto;border-radius:12px;
  display:flex;align-items:center;justify-content:center;font-size:18px;
  background:var(--brand-soft);color:var(--brand);
}
.platform-btn .pf-name{font-size:15.5px;font-weight:600;}
.platform-btn .pf-meta{font-size:12.5px;color:var(--muted);font-family:var(--mono);}
.platform-btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(255,122,47,.24);}
.platform-btn.primary:hover{background:var(--accent-600);border-color:var(--accent-600);color:#fff;}
.platform-btn.primary .pf-icon{background:rgba(255,255,255,.2);color:#fff;}
.platform-btn.primary .pf-meta{color:rgba(255,255,255,.85);}

/* ---------- value / features ---------- */
.value-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:56px;align-items:center;}
.value-media{position:relative;}
.value-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:18px;box-shadow:var(--sh-2);}
.value-media .media-badge{
  position:absolute;right:20px;bottom:-20px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-2);padding:14px 20px;
}
.value-media .media-badge b{display:block;font-size:20px;font-family:var(--mono);color:var(--brand);}
.value-media .media-badge span{font-size:12.5px;color:var(--muted);}
.feature-list{display:grid;gap:22px;margin-top:32px;}
.feature-item{display:flex;gap:16px;}
.feature-item .fi-icon{
  width:44px;height:44px;flex:0 0 auto;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-size:17px;
}
.feature-item h3{font-size:17px;margin-bottom:6px;}
.feature-item p{font-size:14.5px;color:var(--muted);line-height:1.75;}

/* ---------- screenshot rail ---------- */
.shot-block{position:relative;}
.shot-carousel{border-radius:var(--r-card);}
.shot-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.shot-item{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  background:#fff;box-shadow:var(--sh-1);
}
.shot-item img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.shot-item figcaption{padding:12px 16px;font-size:13.5px;color:var(--muted);}
.shot-carousel .carousel-control-prev,
.shot-carousel .carousel-control-next{
  width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--line);
  box-shadow:var(--sh-1);top:50%;transform:translateY(-60%);opacity:1;
}
.shot-carousel .carousel-control-prev{
  left:-6px;
}
.shot-carousel .carousel-control-next{
  right:-6px;
}
.shot-carousel .carousel-control-prev:hover,
.shot-carousel .carousel-control-next:hover{background:var(--brand);border-color:var(--brand);}
.shot-carousel .carousel-control-prev i,
.shot-carousel .carousel-control-next i{color:var(--brand);font-size:15px;}
.shot-carousel .carousel-control-prev:hover i,
.shot-carousel .carousel-control-next:hover i{color:#fff;}
.shot-thumbs{
  position:static;margin:26px 0 0;display:flex;justify-content:center;gap:12px;
}
.shot-thumbs [data-bs-target]{
  width:88px;height:56px;border-radius:10px;border:1px solid var(--line);
  background-size:cover;background-position:center;opacity:.55;
  transition:opacity .2s ease,border-color .2s ease,transform .2s ease;
}
.shot-thumbs .active{opacity:1;border-color:var(--brand);transform:translateY(-2px);}
.shot-extra{display:none;}

/* ---------- requirements ---------- */
.req-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.req-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:28px 26px;
  transition:transform .2s ease,box-shadow .2s ease;
}
.req-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.req-card .rc-head{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.req-card .rc-head i{
  width:40px;height:40px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-size:17px;
}
.req-card .rc-head span{font-size:16px;font-weight:600;}
.req-card dl{display:grid;gap:12px;}
.req-card dl>div{display:flex;align-items:baseline;justify-content:space-between;gap:14px;padding-bottom:12px;border-bottom:1px dashed var(--line);}
.req-card dl>div:last-child{border-bottom:0;padding-bottom:0;}
.req-card dt{
  font-size:12.5px;color:var(--brand);background:var(--brand-soft);
  border-radius:999px;padding:3px 11px;font-weight:600;white-space:nowrap;
}
.req-card dd{font-size:14px;font-weight:600;color:var(--text);text-align:right;}
.req-card dd.num{font-family:var(--mono);}

/* ---------- reviews ---------- */
.review-rail{
  display:flex;gap:20px;overflow-x:auto;padding:6px 4px 22px;
  scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;
}
.review-rail::-webkit-scrollbar{height:6px;}
.review-rail::-webkit-scrollbar-thumb{background:#D6DFEC;border-radius:99px;}
.review-card{
  flex:0 0 300px;scroll-snap-align:start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:24px;display:flex;flex-direction:column;gap:14px;
  transition:transform .2s ease,box-shadow .2s ease;
}
.review-card:nth-child(even){margin-top:22px;}
.review-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.rc-top{display:flex;align-items:center;gap:12px;}
.rc-avatar{
  width:42px;height:42px;border-radius:50%;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-weight:700;font-size:15px;
}
.rc-name{font-size:14.5px;font-weight:600;}
.rc-time{font-size:12.5px;color:var(--muted);}
.stars{display:flex;gap:3px;color:var(--accent);font-size:12.5px;}
.review-card p{font-size:14.5px;color:var(--muted);line-height:1.8;}

/* ---------- CMS posts ---------- */
.posts-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:36px;}
.posts-head .link-more{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.post-card{
  height:100%;display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(29,95,206,.22);}
.post-cover{display:block;overflow:hidden;background:#EDF2FA;}
.post-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease;}
.post-card:hover .post-cover img{transform:scale(1.04);}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1 1 auto;}
.badge-cat{
  align-self:flex-start;font-size:12.5px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border-radius:999px;padding:4px 12px;margin-bottom:12px;
}
.post-body h3{font-size:17px;line-height:1.5;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-body h3 a{color:var(--text);}
.post-body h3 a:hover{color:var(--brand);}
.post-body p{
  font-size:14px;color:var(--muted);line-height:1.75;margin-bottom:18px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  margin-top:auto;padding-top:14px;border-top:1px dashed var(--line);
  font-size:12.5px;color:var(--muted);font-family:var(--mono);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
}
.empty-tip{
  background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-card);
  padding:52px 24px;text-align:center;color:var(--muted);font-size:15px;
}
.empty-tip a{font-weight:600;margin-left:6px;}

/* ---------- faq ---------- */
.faq-wrap{max-width:900px;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);margin-bottom:14px;overflow:hidden;
}
.faq-item .faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:transparent;border:0;text-align:left;cursor:pointer;
  padding:20px 24px;font-size:16px;font-weight:600;color:var(--text);line-height:1.55;
}
.faq-item .faq-q:hover{color:var(--brand);}
.faq-item .faq-q:focus-visible{outline:none;box-shadow:inset 0 0 0 3px rgba(29,95,206,.16);}
.faq-item .faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-size:13px;
  transition:transform .28s ease,background-color .28s ease,color .28s ease;
}
.faq-item .faq-q[aria-expanded="true"] .faq-icon{transform:rotate(135deg);background:var(--accent);color:#fff;}
.faq-a{padding:0 24px 22px;max-width:820px;}
.faq-a p{font-size:14.5px;color:var(--muted);line-height:1.8;}

/* ---------- footer CTA ---------- */
.cta-band{
  background:linear-gradient(140deg,#EAF1FF 0%,#F3F7FF 62%,#F6F8FC 100%);
  border-top:1px solid var(--line);
  border-radius:22px;padding:56px 48px;
}
.cta-band h2{margin-bottom:12px;}
.cta-band .cta-sub{color:var(--muted);font-size:16px;max-width:640px;margin-bottom:28px;}
.cta-plats{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- footer ---------- */
.site-footer{background:#101A26;color:#B9C6D6;margin-top:0;}
.footer-top{padding:72px 0 48px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;color:#fff;font-weight:700;font-size:17px;}
.footer-brand .brand-mark{background:linear-gradient(140deg,#2E77E4,#1D5FCE);}
.footer-about{font-size:14px;line-height:1.85;color:#9BAABC;max-width:340px;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:18px;letter-spacing:.02em;}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{font-size:14px;color:#9BAABC;display:inline-block;transition:color .18s ease,transform .18s ease;}
.footer-col a:hover{color:#fff;transform:translateX(2px);}
.footer-contact li{font-size:14px;color:#9BAABC;display:flex;gap:10px;align-items:flex-start;}
.footer-contact i{color:#5E8FE0;margin-top:5px;font-size:13px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding:22px 0;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;
  font-size:12.5px;color:#7C8CA0;
}
.footer-bottom a{color:#7C8CA0;}
.footer-bottom a:hover{color:#fff;}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .header-inner{gap:16px;}
  .main-nav{gap:20px;}
  .search-shell{max-width:420px;}
}
@media (max-width:991px){
  .section{padding:68px 0;}
  .section-sm{padding:52px 0;}
  .main-nav,.header-cta{display:none;}
  .nav-toggle{display:flex;}
  .header-inner{min-height:66px;gap:12px;}
  .search-shell{display:none;}
  .hero{padding:48px 0 60px;}
  .hero::after{background:linear-gradient(180deg,rgba(246,248,252,.80) 0%,rgba(246,248,252,.95) 70%,var(--bg) 100%);}
  .hero-visual{padding:0;margin-top:34px;}
  .hero-visual img{aspect-ratio:16/10;}
  .hero-float{position:static;margin-top:16px;box-shadow:var(--sh-1);}
  .value-grid{grid-template-columns:1fr;gap:38px;}
  .value-media .media-badge{position:static;margin-top:16px;display:inline-block;}
  .req-grid{grid-template-columns:1fr;}
  .strip-card{margin-top:0;padding:24px 22px;}
  .platform-grid{grid-template-columns:1fr;}
  .shot-row{grid-template-columns:1fr;}
  .shot-thumbs{display:none;}
  .cta-band{padding:40px 26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-about{max-width:none;}
}
@media (max-width:767px){
  .container{padding-left:18px;padding-right:18px;}
  .hero h1{font-size:29px;}
  .hero-facts{gap:14px 24px;}
  .hero-facts li{min-width:44%;}
  .review-card{flex:0 0 82%;}
  .review-card:nth-child(even){margin-top:0;}
  .section{padding:54px 0;}
  .section-head{margin-bottom:32px;}
  .posts-head{margin-bottom:26px;}
  .btn-x{padding:13px 20px;font-size:14.5px;}
}
@media (max-width:575px){
  .footer-grid{grid-template-columns:1fr;}
  .footer-top{padding:54px 0 36px;}
  .cta-plats{flex-direction:column;}
  .cta-plats .btn-x{width:100%;}
  .strip-head h2{font-size:19px;}
  .faq-item .faq-q{padding:17px 18px;font-size:15px;}
  .faq-a{padding:0 18px 20px;}
}

/* roulang page: article */
:root{
  --brand:#1D5FCE;
  --brand-dark:#1750B0;
  --brand-soft:#EAF1FF;
  --accent:#FF7A2F;
  --accent-dark:#EF6A1E;
  --teal:#00B3A4;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --line:#E6ECF5;
  --text:#1B2733;
  --text-2:#5A6B7D;
  --text-3:#8B99A8;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-input:12px;
  --shadow-1:0 2px 6px rgba(20,40,80,.05);
  --shadow-2:0 12px 28px rgba(20,40,80,.10);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  --mono:"SF Mono",Menlo,Consolas,"Courier New",monospace;
}
*,*::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(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,background .2s ease,transform .2s ease}
a:hover{color:var(--brand-dark)}
button{font-family:inherit}
:focus-visible{outline:3px solid rgba(29,95,206,.28);outline-offset:2px;border-radius:6px}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.94);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s ease,border-color .25s ease,background .25s ease;
}
.site-header.is-scrolled{
  background:#fff;
  border-bottom-color:var(--line);
  box-shadow:0 4px 18px rgba(20,40,80,.07);
}
.header-inner{display:flex;align-items:center;gap:18px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:var(--brand);color:#fff;
  display:grid;place-items:center;
  font-size:17px;font-weight:700;line-height:1;
}
.brand-text{font-size:17px;font-weight:700;color:var(--text);white-space:nowrap}
.brand:hover .brand-text{color:var(--brand)}
.nav-search{
  position:relative;flex:1 1 auto;max-width:520px;margin:0 auto;
  display:flex;align-items:center;height:44px;
  background:#F2F5FA;border:1px solid transparent;
  border-radius:var(--radius-input);
  padding:0 4px 0 40px;
  transition:background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.nav-search > i{position:absolute;left:15px;top:50%;transform:translateY(-50%);font-size:14px;color:var(--text-3)}
.nav-search input{
  flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;
  font-size:14px;color:var(--text);outline:none;
}
.nav-search input::placeholder{color:#9AA7B4}
.nav-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(29,95,206,.12)}
.nav-search button{
  flex:0 0 auto;height:36px;padding:0 16px;margin-right:0;
  border:0;border-radius:9px;background:var(--brand);color:#fff;
  font-size:13.5px;font-weight:600;cursor:pointer;
  transition:background .2s ease;
}
.nav-search button:hover{background:var(--brand-dark)}
.main-nav{display:flex;align-items:center;gap:4px;flex:0 0 auto}
.main-nav a{
  position:relative;padding:8px 10px;font-size:15px;font-weight:500;
  color:var(--text-2);white-space:nowrap;border-radius:8px;
}
.main-nav a::after{
  content:"";position:absolute;left:10px;right:10px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
  transform:scaleX(0);transform-origin:center;
  transition:transform .22s ease;
}
.main-nav a:hover{color:var(--brand)}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1)}
.main-nav a.active{color:var(--brand);font-weight:600}
.nav-toggle{
  display:none;width:42px;height:42px;flex:0 0 auto;
  border:1px solid var(--line);background:#fff;border-radius:10px;
  color:var(--text);font-size:16px;cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.mobile-panel{display:none}
.mobile-panel.open{display:block;border-top:1px solid var(--line);background:#fff;padding:16px 0 22px}
.mobile-search{
  position:relative;display:flex;align-items:center;height:46px;
  background:#F2F5FA;border:1px solid transparent;border-radius:var(--radius-input);
  padding:0 4px 0 40px;margin-bottom:14px;
}
.mobile-search > i{position:absolute;left:15px;color:var(--text-3);font-size:14px}
.mobile-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px}
.mobile-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(29,95,206,.12)}
.mobile-search button{height:36px;padding:0 16px;border:0;border-radius:9px;background:var(--accent);color:#fff;font-size:13.5px;font-weight:600}
.hotwords{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:16px;font-size:13px;color:var(--text-3)}
.hotwords a{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;
  background:var(--brand-soft);color:var(--brand);border-radius:999px;font-size:13px;
}
.hotwords a:hover{background:#DDE8FF}
.mobile-nav{display:flex;flex-direction:column;gap:2px}
.mobile-nav a{
  padding:11px 10px;border-radius:10px;font-size:15px;font-weight:500;color:#33414F;
}
.mobile-nav a:hover,.mobile-nav a.active{background:var(--brand-soft);color:var(--brand)}

/* ============ 通用按钮 / 胶囊 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 2px 6px rgba(255,122,47,.28)}
.btn-primary:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px rgba(255,122,47,.26)}
.btn-primary:active{transform:translateY(0);box-shadow:0 2px 6px rgba(255,122,47,.28)}
.btn-outline{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-ghost{background:#F1F4F9;color:#41505F}
.btn-ghost:hover{background:#E6EBF3;color:var(--text)}
.btn-block{width:100%}
.badge-pill{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;white-space:nowrap;
}
.badge-cat{background:var(--brand-soft);color:var(--brand)}
.badge-meta{background:#F1F4F9;color:#63707F}
.badge-ver{background:#EEF1F6;color:#5A6B7D;font-family:var(--mono);font-size:12px}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--teal);margin-right:6px;vertical-align:middle}

/* ============ 面包屑 / 文章头部 ============ */
.page-head{
  background:linear-gradient(180deg,#EAF1FF 0%,rgba(246,248,252,0) 100%);
  padding-bottom:6px;
}
.breadcrumb-line{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:22px 0 0;font-size:13px;color:var(--text-2);
}
.breadcrumb-line a{color:var(--text-2)}
.breadcrumb-line a:hover{color:var(--brand)}
.breadcrumb-line .sep{color:#B9C4D0}
.crumb-current{color:var(--text-3);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-head{padding:20px 0 26px}
.article-head h1{
  font-size:clamp(26px,3.4vw,38px);line-height:1.3;letter-spacing:.2px;
  margin:0 0 18px;max-width:920px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--text-2)}
.article-meta .sep{color:#C6D0DB}
.article-cover{
  margin:0 auto 34px;max-width:1200px;
  border-radius:16px;overflow:hidden;box-shadow:var(--shadow-1);
  background:#E9EEF6;aspect-ratio:16/6;
}
.article-cover img{width:100%;height:100%;object-fit:cover}

/* ============ 主体两栏 ============ */
.page-main{padding-bottom:8px}
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 340px;
  gap:40px;align-items:start;padding-bottom:10px;
}
.article-body{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-1);
  padding:34px 38px;
}
.article-content{font-size:16px;line-height:1.85;color:#26333F;max-width:820px}
.article-content p{margin:0 0 1.2em}
.article-content h2{
  position:relative;font-size:22px;font-weight:700;line-height:1.45;
  margin:1.9em 0 .85em;padding-left:14px;
}
.article-content h2:first-child{margin-top:0}
.article-content h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;
  border-radius:2px;background:var(--brand);
}
.article-content h3{font-size:18px;font-weight:700;margin:1.6em 0 .6em}
.article-content img{border-radius:14px;margin:1.4em auto}
.article-content blockquote{
  margin:1.4em 0;padding:16px 20px;background:var(--brand-soft);
  border-left:4px solid var(--brand);border-radius:0 10px 10px 0;color:#2A3A4A;
}
.article-content ul,.article-content ol{padding-left:1.4em;margin:0 0 1.2em;list-style:revert}
.article-content li{margin:.4em 0}
.article-content table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:15px}
.article-content th,.article-content td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-content th{background:#F4F7FC;font-weight:600}
.article-content a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.empty-state{
  padding:28px 0 10px;text-align:left;
}
.empty-state h2{font-size:22px;margin:0 0 12px}
.empty-state p{color:var(--text-2);margin:0 0 20px;max-width:620px}

/* ============ 侧栏 ============ */
.side-sticky{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-1);
  padding:20px 20px 22px;
}
.side-card h3{font-size:16px;font-weight:700;margin:0 0 12px}
.dl-note{font-size:13.5px;color:var(--text-2);line-height:1.7;margin:0 0 14px}
.dl-facts{display:flex;flex-direction:column;gap:8px;margin:0 0 16px}
.dl-facts li{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-2);
  padding:8px 10px;background:#F7F9FD;border-radius:9px;
}
.dl-facts strong{color:var(--text);font-weight:600;font-family:var(--mono);font-size:12.5px}
.side-links{display:flex;flex-direction:column;gap:2px}
.side-links a{
  display:flex;align-items:flex-start;gap:10px;
  padding:10px 8px;border-radius:10px;font-size:14.5px;
  color:#33414F;line-height:1.55;
}
.side-links a i{color:var(--brand);font-size:13px;margin-top:5px;flex:0 0 auto}
.side-links a:hover{background:var(--brand-soft);color:var(--brand)}
.side-faq{display:flex;flex-direction:column;gap:2px}
.side-faq a{
  padding:10px 8px;border-radius:10px;font-size:14.5px;color:#33414F;line-height:1.55;
}
.side-faq a:hover{background:var(--brand-soft);color:var(--brand)}

/* ============ 相关推荐 ============ */
.related{padding:60px 0 0}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:16px;margin-bottom:24px;
}
.section-head h2{font-size:26px;font-weight:700}
.section-head p{font-size:13.5px;color:var(--text-2);margin-top:6px}
.section-head .more{font-size:14px;font-weight:600;white-space:nowrap}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.post-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-1);
  overflow:hidden;
  transition:transform .22s ease,box-shadow .22s ease;
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.post-thumb{aspect-ratio:16/9;overflow:hidden;background:#E9EEF6}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.post-card:hover .post-thumb img{transform:scale(1.04)}
.post-card-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.post-card h3{font-size:17px;line-height:1.5;font-weight:600}
.post-card p{font-size:13.5px;color:var(--text-2);line-height:1.7;flex:1 1 auto}
.post-meta{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:12.5px;color:var(--text-3);padding-top:2px;
}
.post-card a:hover h3{color:var(--brand)}

/* ============ 下载 CTA ============ */
.cta-band{
  margin:64px 0 0;background:var(--brand-soft);
  border-radius:20px;padding:46px 36px;text-align:center;
}
.cta-band h2{font-size:26px;margin-bottom:10px}
.cta-band p{font-size:14.5px;color:var(--text-2);max-width:640px;margin:0 auto 26px}
.dl-group{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}
.dl-btn{
  display:flex;align-items:center;gap:12px;
  min-width:210px;padding:12px 20px;
  background:#fff;border:1px solid var(--brand);border-radius:var(--radius-btn);
  color:var(--brand);text-align:left;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease;
}
.dl-btn i{font-size:22px}
.dl-btn-text{display:flex;flex-direction:column;line-height:1.35}
.dl-btn-text strong{font-size:15px;font-weight:600}
.dl-btn-text small{font-size:12px;color:var(--text-3);font-family:var(--mono)}
.dl-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);background:#fff;color:var(--brand-dark)}
.dl-btn-main{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 2px 8px rgba(255,122,47,.3)}
.dl-btn-main .dl-btn-text small{color:rgba(255,255,255,.85)}
.dl-btn-main:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:#fff;box-shadow:0 12px 26px rgba(255,122,47,.28)}
.cta-foot{margin-top:20px;font-size:13px;color:var(--text-2)}

/* ============ 页脚 ============ */
.site-footer{background:#112A4A;color:#B9C7D9;padding:56px 0 0;margin-top:76px}
.footer-top{padding-bottom:34px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-brand .brand-mark{background:var(--brand)}
.footer-about{margin:0;font-size:13.5px;line-height:1.85;color:#9FB1C6}
.footer-col h4{font-size:15px;color:#fff;margin:0 0 14px;font-weight:600}
.footer-col ul{display:flex;flex-direction:column;gap:9px}
.footer-col a{font-size:13.5px;color:#B9C7D9;display:inline-block;transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-contact li{display:flex;gap:9px;font-size:13.5px;line-height:1.7;color:#B9C7D9}
.footer-contact i{color:var(--accent);margin-top:5px;flex:0 0 auto}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:18px 0 26px;display:flex;flex-wrap:wrap;
  justify-content:space-between;gap:10px;
  font-size:12.5px;color:#8FA3BA;
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .nav-search{max-width:400px}
  .article-layout{grid-template-columns:minmax(0,1fr) 310px;gap:32px}
}
@media (max-width:991px){
  .main-nav,.header-cta,.nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{height:64px;justify-content:space-between}
  .brand-text{font-size:16px}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:28px}
  .side-sticky{position:static}
  .article-body{padding:28px 26px}
  .article-cover{aspect-ratio:16/8;margin-bottom:26px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .related{padding-top:48px}
  .cta-band{padding:38px 24px;margin-top:52px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .site-footer{margin-top:60px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .article-head h1{font-size:24px}
  .article-body{padding:22px 18px}
  .article-content h2{font-size:20px}
  .article-cover{aspect-ratio:16/10;border-radius:14px}
  .card-grid{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start}
  .dl-group{display:grid;grid-template-columns:1fr 1fr;gap:12px}
  .dl-btn{min-width:0;padding:12px 14px;gap:9px}
  .dl-btn i{font-size:19px}
  .cta-band h2{font-size:22px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
}
@media (max-width:575px){
  .brand-text{max-width:150px;overflow:hidden;text-overflow:ellipsis}
  .dl-group{grid-template-columns:1fr}
  .article-meta{font-size:12.5px}
  .crumb-current{max-width:180px}
  .hotwords{gap:6px}
  .hotwords a{height:26px;padding:0 10px;font-size:12.5px}
}

/* roulang page: category1 */
:root{
  --brand:#1D5FCE;
  --brand-dark:#1749A3;
  --brand-soft:#EAF1FF;
  --accent:#FF7A2F;
  --accent-dark:#F06818;
  --teal:#00B3A4;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --line:#E6ECF5;
  --text:#1B2733;
  --muted:#5A6B7D;
  --r-card:14px;
  --r-btn:10px;
  --r-input:12px;
  --sh1:0 2px 6px rgba(20,40,80,.05);
  --sh2:0 12px 28px rgba(20,40,80,.10);
  --header-h:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-dark)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;color:var(--text)}
p{margin:0 0 1.1em}
ul,ol{margin:0;padding:0}
.container{
  width:100%;
  max-width:1200px !important;
  margin:0 auto;
  padding:0 24px;
}
.section{padding:88px 0}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,2.6vw,32px);font-weight:700;margin-bottom:12px}
.section-head p{color:var(--muted);margin:0;font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border-radius:999px;padding:5px 14px;margin-bottom:16px;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:background-color .2s,transform .2s,box-shadow .2s,color .2s,border-color .2s;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 4px 12px rgba(255,122,47,.26)}
.btn-primary:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px rgba(255,122,47,.30)}
.btn-outline{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand);transform:translateY(-1px);box-shadow:var(--sh2)}
.btn-ghost{background:var(--brand-soft);color:var(--brand)}
.btn-ghost:hover{background:#dde8ff;color:var(--brand-dark);transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(29,95,206,.25)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.97);
  backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .25s,box-shadow .25s;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 4px 18px rgba(20,40,80,.07)}
.header-inner{display:flex;align-items:center;gap:22px;min-height:var(--header-h)}
.logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--text);white-space:nowrap;flex-shrink:0}
.logo:hover{color:var(--text)}
.logo-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,#2A6ED8,#1749A3);
  color:#fff;display:grid;place-items:center;font-size:16px;font-weight:700;
}
.search-box{
  position:relative;display:flex;align-items:center;
  flex:1 1 auto;max-width:540px;margin:0 auto;
  height:44px;padding:0 6px 0 14px;
  background:#F2F5FA;border:1px solid transparent;border-radius:var(--r-input);
  transition:background-color .2s,border-color .2s,box-shadow .2s;
}
.search-box>i{color:var(--muted);font-size:14px}
.search-box input{
  flex:1;height:100%;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--text);padding:0 10px;
}
.search-box input::placeholder{color:#93A2B4}
.search-box:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(29,95,206,.12)}
.search-btn{
  border:0;background:var(--brand);color:#fff;font-size:13px;font-weight:600;
  border-radius:8px;padding:8px 16px;cursor:pointer;transition:background-color .2s;
}
.search-btn:hover{background:var(--brand-dark)}
.main-nav{display:flex;align-items:center;gap:4px;flex-shrink:0}
.main-nav a{
  position:relative;padding:8px 12px;font-size:15px;font-weight:500;
  color:var(--muted);transition:color .2s;
}
.main-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;
  border-radius:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .25s;
}
.main-nav a:hover,.main-nav a.active{color:var(--brand)}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1)}
.header-cta{padding:11px 20px;font-size:14px;flex-shrink:0}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:#fff;color:var(--text);font-size:16px;cursor:pointer;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}

/* ---------- 移动端抽屉 ---------- */
.mobile-panel{
  display:none;position:fixed;top:var(--header-h);left:0;right:0;z-index:1029;
  background:#fff;border-bottom:1px solid var(--line);
  box-shadow:0 18px 32px rgba(20,40,80,.12);
  padding:20px 24px 26px;max-height:calc(100vh - var(--header-h));overflow-y:auto;
}
.mobile-panel.open{display:block}
.mobile-search{
  display:flex;align-items:center;gap:10px;height:44px;
  background:#F2F5FA;border:1px solid transparent;border-radius:var(--r-input);padding:0 14px;
}
.mobile-search i{color:var(--muted)}
.mobile-search input{flex:1;border:0;background:transparent;outline:none;font-size:14px}
.hot-words{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 20px}
.hot-words span{font-size:13px;color:var(--muted);width:100%;margin-bottom:-2px}
.chip{
  font-size:13px;color:var(--brand);background:var(--brand-soft);
  border-radius:999px;padding:5px 12px;
}
.mobile-nav{display:grid;gap:6px;margin-bottom:18px}
.mobile-nav a{
  padding:12px 14px;border-radius:10px;font-size:15px;font-weight:500;
  color:var(--text);background:#F7F9FD;
}
.mobile-nav a.active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.btn-block{width:100%}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:18px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand)}
.crumb i{font-size:10px;color:#A9B6C6}

/* ---------- 内页 Hero ---------- */
.page-hero{position:relative;overflow:hidden;padding:64px 0 56px;background:#fff}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.16;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(255,255,255,.35) 0%,rgba(246,248,252,.92) 78%,var(--bg) 100%);
}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{
  font-size:clamp(28px,3.6vw,42px);font-weight:700;line-height:1.25;
  max-width:900px;margin-bottom:16px;letter-spacing:-.2px;
}
.page-hero .lead{
  max-width:760px;font-size:16.5px;color:var(--muted);margin-bottom:24px;
}
.meta-row{display:flex;flex-wrap:wrap;gap:10px}
.meta-pill{
  display:inline-flex;align-items:center;gap:7px;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:6px 14px;font-size:13px;color:var(--muted);box-shadow:var(--sh1);
}
.meta-pill i{color:var(--brand);font-size:12px}
.meta-pill b{color:var(--text);font-weight:600;font-variant-numeric:tabular-nums}

/* ---------- 主体两栏 ---------- */
.layout{display:grid;grid-template-columns:248px minmax(0,1fr);gap:48px;padding:56px 0 40px;align-items:start}
.toc{
  position:sticky;top:calc(var(--header-h) + 24px);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px 16px;box-shadow:var(--sh1);
}
.toc h2{font-size:13px;letter-spacing:.06em;color:var(--muted);font-weight:600;padding:0 10px 12px;text-transform:uppercase}
.toc a{
  display:block;padding:9px 12px;border-radius:8px;font-size:14px;color:var(--muted);
  border-left:2px solid transparent;transition:color .2s,background-color .2s,border-color .2s;
}
.toc a:hover{color:var(--brand);background:var(--brand-soft)}
.toc a.active{color:var(--brand);background:var(--brand-soft);border-left-color:var(--brand);font-weight:600}
.toc-foot{margin-top:16px;padding:14px 12px 4px;border-top:1px solid var(--line);font-size:12.5px;color:var(--muted);line-height:1.7}

.content{min-width:0}
.content-section{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:32px 34px;box-shadow:var(--sh1);margin-bottom:28px;
  transition:box-shadow .25s,transform .25s;
}
.content-section:hover{box-shadow:var(--sh2)}
.content-section h2{
  position:relative;padding-left:16px;font-size:clamp(20px,2.2vw,26px);font-weight:700;margin-bottom:16px;
}
.content-section h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;border-radius:2px;background:var(--brand);
}
.content-section p{color:#33445A;line-height:1.85;margin-bottom:1.15em}
.content-section p:last-child{margin-bottom:0}
.content-figure{
  margin:24px 0;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);background:#EEF2F9;
}
.content-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s}
.content-figure:hover img{transform:scale(1.02)}
.content-figure figcaption{padding:12px 16px;font-size:13px;color:var(--muted);background:#fff;border-top:1px solid var(--line)}

.step-list{counter-reset:step;list-style:none;margin:22px 0 6px;padding:0}
.step-list li{
  position:relative;padding:16px 20px 16px 62px;margin-bottom:12px;
  background:#FBFCFE;border:1px solid var(--line);border-radius:12px;
  line-height:1.75;color:#33445A;
}
.step-list li::before{
  counter-increment:step;content:counter(step);
  position:absolute;left:18px;top:16px;width:28px;height:28px;border-radius:50%;
  background:var(--brand-soft);color:var(--brand);
  font-size:13px;font-weight:700;display:grid;place-items:center;
}
.step-list li b{color:var(--text)}

.dot-list{list-style:none;margin:20px 0 6px;padding:0;display:grid;gap:12px}
.dot-list li{
  position:relative;padding-left:26px;color:#33445A;line-height:1.75;
}
.dot-list li::before{
  content:"";position:absolute;left:4px;top:.72em;width:8px;height:8px;border-radius:50%;
  background:var(--teal);box-shadow:0 0 0 4px rgba(0,179,164,.12);
}
.dot-list li strong{color:var(--text)}

.note-card{
  display:flex;gap:14px;margin:22px 0 6px;padding:18px 20px;
  background:var(--brand-soft);border-radius:12px;border-left:4px solid var(--brand);
}
.note-card i{color:var(--brand);font-size:17px;margin-top:4px}
.note-card p{margin:0;font-size:15px;color:#2C4666;line-height:1.8}

/* ---------- 参数卡 ---------- */
.spec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:8px}
.spec-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh1);transition:box-shadow .25s,transform .25s;
  display:flex;flex-direction:column;
}
.spec-card:hover{box-shadow:var(--sh2);transform:translateY(-2px)}
.spec-card .spec-top{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.spec-card .spec-top i{font-size:20px;color:var(--brand)}
.spec-card h3{font-size:18px;font-weight:600}
.spec-card dl{display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px 12px;margin:16px 0 0}
.spec-card dt{
  justify-self:start;background:var(--brand-soft);color:var(--brand);
  font-size:12px;font-weight:600;border-radius:999px;padding:3px 10px;line-height:1.6;
}
.spec-card dd{margin:0;font-size:14px;font-weight:600;color:#2C3E52;font-variant-numeric:tabular-nums}
.spec-card .spec-note{margin:16px 0 0;font-size:13px;color:var(--muted);line-height:1.7}

/* ---------- 下载按钮组 ---------- */
.dl-block{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px 32px;box-shadow:var(--sh1);
}
.dl-block h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;margin-bottom:10px}
.dl-block .dl-hint{color:var(--muted);font-size:15px;margin-bottom:22px}
.dl-group{display:flex;flex-wrap:wrap;gap:14px}
.dl-btn{
  display:flex;align-items:center;gap:12px;min-width:196px;
  padding:14px 20px;border-radius:12px;border:1px solid var(--brand);
  background:#fff;color:var(--brand);
  transition:background-color .2s,color .2s,transform .2s,box-shadow .2s,border-color .2s;
}
.dl-btn i{font-size:22px}
.dl-text{display:flex;flex-direction:column;line-height:1.35}
.dl-text strong{font-size:15px;font-weight:600}
.dl-text em{font-style:normal;font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.dl-btn:hover{background:var(--brand-soft);color:var(--brand);transform:translateY(-1px);box-shadow:var(--sh2)}
.dl-btn-primary{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 4px 12px rgba(255,122,47,.26)}
.dl-btn-primary .dl-text em{color:rgba(255,255,255,.88)}
.dl-btn-primary:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 14px 26px rgba(255,122,47,.3)}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh1);margin-bottom:14px;overflow:hidden;transition:box-shadow .25s;
}
.faq-item:hover{box-shadow:var(--sh2)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16.5px;font-weight:600;color:var(--text);line-height:1.6;
}
.faq-q:focus-visible{outline:2px solid rgba(29,95,206,.4);outline-offset:-2px}
.faq-plus{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  background:var(--brand-soft);color:var(--brand);
  display:grid;place-items:center;font-size:13px;
  transition:transform .3s,background-color .3s,color .3s;
}
.faq-item.open .faq-plus{transform:rotate(45deg);background:var(--brand);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
.faq-a p{
  margin:0;padding:0 22px 22px;max-width:820px;
  color:var(--muted);line-height:1.85;font-size:15px;
}

/* ---------- 底部 CTA ---------- */
.cta-band{
  background:var(--brand-soft);border-radius:20px;
  padding:48px 44px;display:flex;flex-wrap:wrap;gap:28px;
  align-items:center;justify-content:space-between;
}
.cta-band h2{font-size:clamp(22px,2.4vw,28px);font-weight:700;margin-bottom:10px}
.cta-band p{margin:0;color:#3C567A;max-width:560px;font-size:15.5px}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--line);margin-top:88px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.5fr;gap:36px;padding:56px 0 34px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;margin-bottom:14px}
.brand-mark{
  width:30px;height:30px;border-radius:9px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-size:14px;font-weight:700;
}
.footer-about{font-size:14px;color:var(--muted);line-height:1.85;margin:0;max-width:360px}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:16px}
.footer-col ul{list-style:none;display:grid;gap:10px}
.footer-col a{display:inline-block;font-size:14px;color:var(--muted);transition:color .2s,transform .2s}
.footer-col a:hover{color:var(--brand);transform:translateX(2px)}
.footer-contact li{display:flex;gap:9px;font-size:13.5px;color:var(--muted);line-height:1.7}
.footer-contact i{color:var(--teal);margin-top:4px;font-size:13px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  padding:18px 0;border-top:1px solid var(--line);
  font-size:12px;color:var(--muted);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .layout{grid-template-columns:216px minmax(0,1fr);gap:36px}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:30px}
  .footer-grid>div:last-child{grid-column:1 / -1}
}
@media (max-width:991px){
  .main-nav,.header-cta,.search-box{display:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;margin-left:auto}
  .header-inner{gap:14px}
  .section{padding:64px 0}
  .layout{grid-template-columns:minmax(0,1fr);padding:36px 0 20px;gap:24px}
  .toc{position:static;top:auto;padding:16px}
  .toc h2{padding-bottom:10px}
  .toc nav{display:flex;flex-wrap:wrap;gap:6px}
  .toc a{flex:0 0 auto;border-left:0;border-radius:999px;background:#F7F9FD;padding:7px 14px;font-size:13px}
  .toc a.active{border-left:0}
  .toc-foot{display:none}
  .spec-grid{grid-template-columns:minmax(0,1fr)}
  .cta-band{padding:36px 28px}
  .content-section{padding:26px 22px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:48px 0}
  .page-hero{padding:40px 0 36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-grid>div:first-child,.footer-grid>div:last-child{grid-column:1 / -1}
  .dl-block{padding:24px 20px}
  .dl-group{display:grid;grid-template-columns:1fr 1fr;gap:12px}
  .dl-btn{min-width:0;padding:12px 14px;gap:9px}
  .dl-btn i{font-size:19px}
  .dl-text strong{font-size:14px}
  .dl-text em{font-size:11.5px}
  .cta-band{padding:30px 20px}
}
@media (max-width:575px){
  .page-hero h1{font-size:26px}
  .page-hero .lead{font-size:15px}
  .content-section{padding:22px 18px}
  .step-list li{padding:14px 16px 14px 54px}
  .step-list li::before{left:14px}
  .dl-group{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:6px}
}

/* roulang page: category2 */
:root{
  --brand:#1D5FCE;
  --brand-deep:#17509f;
  --brand-soft:#EAF1FF;
  --accent:#FF7A2F;
  --accent-deep:#ef6a1d;
  --teal:#00B3A4;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --line:#E6ECF5;
  --text:#1B2733;
  --muted:#5A6B7D;
  --r-card:14px;
  --r-btn:10px;
  --r-input:12px;
  --r-pill:999px;
  --sh-1:0 2px 6px rgba(20,40,80,.05);
  --sh-2:0 12px 28px rgba(20,40,80,.10);
  --sp:8px;
  --container:1200px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-num:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700}
p{margin:0}
button,input,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:3px solid rgba(29,95,206,.35);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);font-size:15px;font-weight:600;
  padding:11px 20px;border:1px solid transparent;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(255,122,47,.24)}
.btn-primary:hover{background:var(--accent-deep);transform:translateY(-1px);box-shadow:0 12px 24px rgba(255,122,47,.28);color:#fff}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-secondary{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn-secondary:hover{background:var(--brand-soft);transform:translateY(-1px);box-shadow:var(--sh-2);color:var(--brand)}
.btn-ghost{background:#F2F5FA;color:var(--text)}
.btn-ghost:hover{background:#e8eef8;transform:translateY(-1px)}
.btn-lg{padding:13px 26px;font-size:16px}
.btn-sm{padding:8px 14px;font-size:13.5px}

/* ============ 徽章 ============ */
.badge-pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;line-height:1.6;
}
.badge-cat{background:var(--brand-soft);color:var(--brand)}
.badge-meta{background:#F2F5FA;color:#43536b}
.badge-accent{background:rgba(255,122,47,.12);color:#c9541a}
.dot{width:7px;height:7px;border-radius:50%;background:var(--teal);display:inline-block;flex:0 0 auto}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s ease,border-color .25s ease,background .25s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 20px rgba(20,40,80,.07)}
.header-inner{display:flex;align-items:center;gap:24px;min-height:78px}
.logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;letter-spacing:.2px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand),#4a86e8);
  color:#fff;display:grid;place-items:center;font-size:17px;font-weight:700;
}
.logo-text{color:var(--text)}
.nav-search{
  flex:1 1 auto;max-width:540px;margin:0 auto;
  display:flex;align-items:center;gap:10px;
  background:#F2F5FA;border:1px solid #F2F5FA;border-radius:var(--r-input);
  padding:5px 5px 5px 15px;transition:background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.nav-search i{color:var(--muted);font-size:14px}
.nav-search input{
  flex:1 1 auto;min-width:0;border:0;background:transparent;
  padding:7px 0;font-size:14.5px;outline:none;
}
.nav-search input::placeholder{color:#93a2b4}
.nav-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(29,95,206,.12),var(--sh-1)}
.search-btn{
  background:var(--brand);color:#fff;border-radius:9px;
  padding:8px 16px;font-size:14px;font-weight:600;
  transition:background .2s ease;
}
.search-btn:hover{background:var(--brand-deep)}
.main-nav{display:flex;align-items:center;gap:4px;flex:0 0 auto}
.main-nav a{
  position:relative;padding:8px 12px;font-size:14.5px;font-weight:500;color:var(--muted);
  border-radius:8px;transition:color .2s ease;
}
.main-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;border-radius:2px;
}
.main-nav a:hover{color:var(--brand)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.active{color:var(--brand);font-weight:600}
.main-nav a.active::after{transform:scaleX(1)}
.nav-cta{flex:0 0 auto}
.mobile-actions{display:none;align-items:center;gap:6px;margin-left:auto}
.icon-btn{
  width:40px;height:40px;border-radius:10px;display:grid;place-items:center;
  color:var(--text);background:#F2F5FA;transition:background .2s ease,color .2s ease;
}
.icon-btn:hover{background:var(--brand-soft);color:var(--brand)}
.mobile-panel{display:none;border-top:1px solid var(--line);background:#fff}
.mobile-panel.open{display:block}
.mobile-panel-inner{padding:16px 0 22px}
.mobile-search{
  display:flex;align-items:center;gap:10px;background:#F2F5FA;
  border-radius:var(--r-input);padding:6px 6px 6px 14px;border:1px solid #F2F5FA;
}
.mobile-search input{flex:1 1 auto;border:0;background:transparent;padding:8px 0;font-size:14.5px;outline:none;min-width:0}
.hot-words{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 18px}
.hot-words a{
  font-size:13px;padding:5px 12px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand);font-weight:500;
}
.hot-words a:hover{background:#dbe7ff}
.mobile-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:16px}
.mobile-nav a{
  padding:11px 14px;border-radius:10px;font-size:15px;color:var(--text);
  background:#F7F9FD;font-weight:500;
}
.mobile-nav a.active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.mobile-nav a:hover{background:var(--brand-soft);color:var(--brand)}

/* ============ 内页 Hero ============ */
.page-hero{
  position:relative;
  padding:52px 0 44px;
  background-image:linear-gradient(180deg,rgba(246,248,252,.90),rgba(246,248,252,.98)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:18px;flex-wrap:wrap}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand)}
.crumb span.sep{color:#b6c2d2}
.crumb .current{color:var(--text);font-weight:600}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.page-hero h1{
  font-size:clamp(26px,3.6vw,38px);
  font-weight:700;line-height:1.28;letter-spacing:.2px;
  max-width:900px;
}
.page-hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{margin-top:16px;max-width:760px;color:var(--muted);font-size:16.5px;line-height:1.8}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.meta-chip{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);
  padding:7px 15px;font-size:13.5px;color:var(--muted);box-shadow:var(--sh-1);
}
.meta-chip b{color:var(--text);font-weight:600}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* ============ 板块通用 ============ */
.section{padding:88px 0}
.section.tight{padding:64px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:780px;margin-bottom:40px}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border-radius:var(--r-pill);padding:5px 13px;margin-bottom:14px;
}
.section-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35}
.section-head p{margin-top:14px;color:var(--muted);font-size:15.5px}
.section-head.split{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.section-head.split .more-link{font-size:14px;font-weight:600;color:var(--brand);white-space:nowrap}
.section-head.split .more-link:hover{color:var(--brand-deep)}

/* ============ 步骤条 / Tab ============ */
.step-wrap{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:8px;margin-bottom:32px;
}
.step-bar{display:flex;gap:8px;overflow-x:auto;scrollbar-width:thin}
.step-bar::-webkit-scrollbar{height:5px}
.step-bar::-webkit-scrollbar-thumb{background:#d8e2f0;border-radius:99px}
.step-item{
  flex:1 1 0;min-width:168px;
  display:flex;align-items:center;gap:10px;
  padding:12px 16px;border-radius:10px;
  font-size:14.5px;font-weight:600;color:var(--muted);
  background:transparent;transition:background .2s ease,color .2s ease;
}
.step-item .n{
  width:26px;height:26px;flex:0 0 auto;border-radius:8px;
  display:grid;place-items:center;font-size:13px;font-weight:700;
  background:var(--brand-soft);color:var(--brand);font-family:var(--font-num);
  transition:background .2s ease,color .2s ease;
}
.step-item:hover{background:#F5F8FE;color:var(--brand)}
.step-item.active{background:var(--brand);color:#fff}
.step-item.active .n{background:rgba(255,255,255,.22);color:#fff}
.tab-pane{animation:fadeUp .35s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.pane-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:32px;
}
.pane-card h3{font-size:21px;margin-bottom:14px}
.pane-card > p{color:var(--muted);font-size:15.5px;max-width:860px}
.pane-list{display:grid;gap:14px;margin-top:24px}
.pane-list li{
  display:flex;gap:12px;align-items:flex-start;
  background:#F7F9FD;border-radius:12px;padding:14px 18px;font-size:15px;color:#3d4c5f;
}
.pane-list li i{color:var(--brand);margin-top:5px;font-size:13px}
.pane-list li b{color:var(--text)}

/* ============ 卡片网格（高低错落） ============ */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;align-items:start}
.info-card{
  display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease;
  height:100%;
}
.info-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.card-figure{aspect-ratio:16/9;overflow:hidden;background:#EDF2FA}
.card-figure img{width:100%;height:100%;object-fit:cover}
.card-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto}
.card-body h3{font-size:19px;line-height:1.4}
.card-body p{color:var(--muted);font-size:15px}
.card-list{display:grid;gap:8px;margin-top:2px}
.card-list li{display:flex;gap:10px;font-size:14.5px;color:#3d4c5f;align-items:flex-start}
.card-list li i{color:var(--teal);font-size:12px;margin-top:6px}
.card-foot{
  margin-top:auto;padding-top:14px;border-top:1px dashed var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--muted);
}

/* ============ 说明型信息卡 ============ */
.explain-card{
  display:grid;grid-template-columns:minmax(0,420px) 1fr;gap:0;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
}
.explain-media{background:#EDF2FA;min-height:320px}
.explain-media img{width:100%;height:100%;object-fit:cover}
.explain-body{padding:36px}
.explain-body h2{font-size:24px;margin-bottom:12px}
.explain-body > p{color:var(--muted);font-size:15.5px;margin-bottom:26px}
.def-row{
  display:flex;gap:20px;align-items:flex-start;
  padding:16px 0;border-top:1px solid var(--line);
}
.def-row:first-of-type{border-top:0;padding-top:0}
.def-key{flex:0 0 150px;display:flex;align-items:center;gap:8px;font-size:14.5px;font-weight:600;color:var(--text)}
.def-val{flex:1 1 auto;font-size:14.5px;color:var(--muted)}
.def-val b{color:var(--text);font-weight:600}

/* ============ 数据带 ============ */
.band{
  background:#12253f;
  color:#e9f0fb;
  padding:64px 0;
  background-image:linear-gradient(120deg,rgba(18,37,63,.94),rgba(23,80,159,.88)),url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
}
.band h2{font-size:clamp(21px,2.4vw,27px);color:#fff;margin-bottom:12px}
.band p{color:#b9cae2;font-size:15.5px;max-width:720px}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:36px}
.stat-item{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-card);padding:22px 20px;
}
.stat-item .val{font-family:var(--font-num);font-size:30px;font-weight:700;color:#fff;line-height:1.2}
.stat-item .val small{font-size:14px;font-weight:600;margin-left:4px;color:#9fc0e8}
.stat-item .lab{margin-top:8px;font-size:14px;color:#b9cae2}

/* ============ FAQ ============ */
.faq-list{max-width:900px;display:grid;gap:14px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
}
.faq-item .faq-btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;text-align:left;font-size:16.5px;font-weight:600;color:var(--text);
}
.faq-item .faq-btn:hover{color:var(--brand)}
.faq-icon{
  width:30px;height:30px;flex:0 0 auto;border-radius:50%;
  background:var(--brand-soft);color:var(--brand);
  display:grid;place-items:center;transition:transform .25s ease,background .25s ease,color .25s ease;
}
.faq-btn[aria-expanded="true"] .faq-icon{transform:rotate(45deg);background:var(--accent);color:#fff}
.faq-body{padding:0 24px 22px;color:var(--muted);font-size:15px;line-height:1.85;max-width:820px}

/* ============ 下载区 / CTA ============ */
.cta-band{
  background:var(--brand-soft);
  border:1px solid #d7e4ff;
  border-radius:18px;
  padding:44px 40px;
  display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
}
.cta-band h2{font-size:clamp(21px,2.4vw,27px);margin-bottom:12px}
.cta-band p{color:var(--muted);font-size:15.5px;max-width:640px}
.dl-grid{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.dl-pill{
  display:flex;align-items:center;gap:12px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);
  padding:10px 20px 10px 12px;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.dl-pill:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#cddaf0}
.dl-pill .ico{
  width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);font-size:16px;
}
.dl-pill .txt{display:flex;flex-direction:column;line-height:1.35}
.dl-pill .txt b{font-size:14.5px;font-weight:600}
.dl-pill .txt span{font-size:12.5px;color:var(--muted);font-family:var(--font-num)}
.dl-pill.primary{background:var(--accent);border-color:transparent}
.dl-pill.primary .ico{background:rgba(255,255,255,.22);color:#fff}
.dl-pill.primary .txt b{color:#fff}
.dl-pill.primary .txt span{color:rgba(255,255,255,.86)}
.dl-pill.primary:hover{background:var(--accent-deep)}
.cta-note{font-size:13px;color:var(--muted);margin-top:16px;display:flex;align-items:center;gap:8px}

/* ============ 页脚 ============ */
.site-footer{background:#0f1f36;color:#c4d2e5;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-about{font-size:14px;line-height:1.85;color:#9fb2ca;max-width:400px}
.footer-col h4{font-size:15.5px;color:#fff;margin-bottom:18px}
.footer-col ul{display:grid;gap:11px}
.footer-col ul a{font-size:14px;color:#9fb2ca;display:inline-block;transition:color .2s ease,transform .2s ease}
.footer-col ul a:hover{color:#fff;transform:translateX(2px)}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:#9fb2ca;line-height:1.7}
.footer-contact i{color:var(--teal);margin-top:5px;font-size:13px}
.footer-bottom{
  margin-top:52px;border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0 30px;display:flex;flex-wrap:wrap;gap:10px;
  justify-content:space-between;font-size:12px;color:#8296b0;
}

/* ============ 响应式 ============ */
@media (max-width:991px){
  .nav-search,.main-nav,.nav-cta{display:none}
  .mobile-actions{display:flex}
  .header-inner{min-height:68px;gap:14px}
  .section{padding:64px 0}
  .section.tight{padding:52px 0}
  .explain-card{grid-template-columns:1fr}
  .explain-media{min-height:220px;aspect-ratio:16/9}
  .explain-body{padding:28px}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band{grid-template-columns:1fr;padding:34px 26px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-about{max-width:none}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:52px 0}
  .page-hero{padding:36px 0 34px}
  .hero-sub{font-size:15.5px}
  .card-grid{grid-template-columns:1fr;gap:18px}
  .step-item{min-width:150px;font-size:14px;padding:11px 13px}
  .pane-card{padding:24px 20px}
  .def-row{flex-direction:column;gap:6px}
  .def-key{flex:none}
  .section-head.split{flex-direction:column;align-items:flex-start;gap:12px}
  .dl-grid{gap:10px}
  .dl-pill{padding:9px 16px 9px 10px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:575px){
  .section{padding:44px 0}
  .hero-meta{gap:8px}
  .meta-chip{font-size:12.5px;padding:6px 12px}
  .stat-grid{grid-template-columns:1fr;gap:14px}
  .cta-band{padding:26px 18px;border-radius:14px}
  .dl-grid{display:grid;grid-template-columns:repeat(2,1fr)}
  .dl-pill{border-radius:14px;padding:10px 12px}
  .dl-pill .txt span{font-size:11.5px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .faq-item .faq-btn{padding:16px 18px;font-size:15.5px}
  .faq-body{padding:0 18px 18px}
}