/* roulang page: index */
:root{
  --c-primary:#1F6BD6;
  --c-primary-dark:#14509F;
  --c-primary-soft:#E9F1FD;
  --c-accent:#E9A23B;
  --c-bg:#F6F9FC;
  --c-surface:#FFFFFF;
  --c-line:#E4ECF4;
  --c-ink:#22303F;
  --c-ink-2:#55677A;
  --c-ink-3:#8A9AAB;
  --c-success:#2E9E6B;
  --c-error:#D9534F;
  --c-footer:#0E2138;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,50,86,.05);
  --sh-2:0 8px 24px -14px rgba(20,50,86,.16);
  --sh-3:0 18px 44px -20px rgba(20,50,86,.24);
  --sh-focus:0 0 0 4px rgba(31,107,214,.16);
  --f-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  --f-num:ui-monospace,"DIN Alternate",Menlo,Consolas,monospace;
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--f-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
}
img{max-width:100%;display:block}
a{color:var(--c-primary);text-decoration:none}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
button,input{font-family:inherit;font-size:inherit;color:inherit}
button{border:0;background:none;cursor:pointer}
:focus-visible{outline:none;box-shadow:var(--sh-focus);border-radius:var(--r-sm)}
.num{font-family:var(--f-num);font-variant-numeric:tabular-nums}

.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:transform .18s ease-out,background .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out,color .18s ease-out;
}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-dark);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:#CBDCF3}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary-dark);box-shadow:var(--sh-1)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn:disabled{background:#C6D3E0;color:#fff;cursor:not-allowed;transform:none;box-shadow:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary);transition:color .18s}
.link-arrow span{transition:transform .18s ease-out}
.link-arrow:hover{color:var(--c-primary-dark)}
.link-arrow:hover span{transform:translateX(3px)}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .18s ease-out;
}
.site-header.is-scrolled{box-shadow:var(--sh-1)}
.header-inner{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:600;color:var(--c-ink);letter-spacing:.01em}
.brand:hover .brand-mark{background:var(--c-primary-dark)}
.brand-mark{
  width:32px;height:32px;border-radius:var(--r-sm);
  background:var(--c-primary);color:#fff;
  display:grid;place-items:center;font-size:15px;font-weight:700;
  transition:background .18s ease-out;
}
.nav{display:flex;align-items:center;gap:4px}
.nav a{
  position:relative;display:flex;align-items:center;height:68px;padding:0 12px;
  font-size:15px;font-weight:500;color:var(--c-ink-2);transition:color .18s ease-out;
}
.nav a:hover{color:var(--c-primary)}
.nav a.active{color:var(--c-primary-dark);font-weight:600}
.nav a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.search{position:relative;display:block}
.search svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--c-ink-3)}
.search input{
  height:40px;width:220px;border-radius:var(--r-pill);
  border:1px solid transparent;background:#F2F6FA;
  padding:0 16px 0 38px;font-size:14px;outline:none;
  transition:background .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.search input::placeholder{color:var(--c-ink-3)}
.search input:focus{background:#fff;border-color:var(--c-primary);box-shadow:var(--sh-focus)}
.hamburger{
  display:none;width:44px;height:44px;border-radius:var(--r-md);
  align-items:center;justify-content:center;color:var(--c-ink);
  border:1px solid var(--c-line);background:#fff;
}
.hamburger:hover{border-color:var(--c-primary);color:var(--c-primary)}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,33,56,.42);
  opacity:0;visibility:hidden;transition:opacity .2s ease-out,visibility .2s;z-index:80;
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82%;max-width:360px;z-index:90;
  background:#fff;box-shadow:var(--sh-3);
  transform:translateX(102%);transition:transform .24s ease-out;
  display:flex;flex-direction:column;padding:20px;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-head .brand{font-size:15px}
.drawer-close{width:40px;height:40px;border-radius:var(--r-md);border:1px solid var(--c-line);display:grid;place-items:center;color:var(--c-ink-2)}
.drawer-close:hover{border-color:var(--c-primary);color:var(--c-primary)}
.drawer .search input{width:100%}
.drawer-nav{margin:16px 0;display:flex;flex-direction:column}
.drawer-nav a{
  display:flex;align-items:center;height:52px;padding-left:14px;
  font-size:16px;font-weight:500;color:var(--c-ink);
  border-bottom:1px solid var(--c-line);border-left:3px solid transparent;
}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--c-primary-dark);border-left-color:var(--c-primary);background:#F8FBFF}
.drawer-cta{width:100%;margin-top:auto}

/* ---------- Hero ---------- */
.hero{
  padding:80px 0;
  background:linear-gradient(180deg,#EDF4FE 0%,var(--c-bg) 100%);
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;
  border-radius:var(--r-pill);background:var(--c-primary-soft);
  color:var(--c-primary-dark);font-size:13px;font-weight:500;
}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--c-accent);display:block}
.hero h1{
  font-size:44px;line-height:1.2;font-weight:700;letter-spacing:.01em;
  color:var(--c-ink);margin:20px 0 16px;
}
.hero-sub{font-size:17px;line-height:1.85;color:var(--c-ink-2);max-width:580px}
.hero-cta{display:flex;gap:16px;margin-top:32px;flex-wrap:wrap}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:8px 24px;margin-top:24px;
  font-size:13px;color:var(--c-ink-3);
}
.hero-meta b{font-family:var(--f-num);font-weight:600;color:var(--c-ink);font-variant-numeric:tabular-nums}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-xl);border:1px solid var(--c-line);box-shadow:var(--sh-3);
}

/* ---------- 信任条 ---------- */
.trustbar{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.trustbar-inner{display:flex;align-items:center;min-height:72px}
.trust-item{flex:1;display:flex;align-items:baseline;justify-content:center;gap:10px;padding:12px 8px}
.trust-item + .trust-item{border-left:1px solid var(--c-line)}
.trust-num{font-family:var(--f-num);font-size:20px;font-weight:700;color:var(--c-primary);font-variant-numeric:tabular-nums}
.trust-label{font-size:13px;color:var(--c-ink-3)}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-alt{background:#fff}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:48px}
.section-head h2{font-size:30px;line-height:1.3;font-weight:700;color:var(--c-ink)}
.section-head p{margin-top:12px;font-size:15px;line-height:1.8;color:var(--c-ink-2);max-width:660px}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;color:var(--c-primary);
  padding-left:12px;border-left:4px solid var(--c-primary);line-height:1.2;margin-bottom:14px;
}
.card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-2);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-3);border-color:#CFE0F7}

/* ---------- 功能非对称区 ---------- */
.feature-grid{display:grid;grid-template-columns:7fr 5fr;grid-template-rows:182px 182px;gap:16px 24px}
.feature-main{grid-row:1 / span 2;display:flex;flex-direction:column;overflow:hidden}
.feature-main img{width:100%;aspect-ratio:16/9;object-fit:cover;border-bottom:1px solid var(--c-line)}
.feature-main-body{padding:24px 28px 28px;display:flex;flex-direction:column;flex:1}
.feature-main-body h3{font-size:22px;line-height:1.4;font-weight:600;margin-bottom:10px}
.feature-main-body p{font-size:15px;line-height:1.8;color:var(--c-ink-2)}
.feature-main-body .link-arrow{margin-top:auto;padding-top:16px}
.feature-mini{display:flex;align-items:center;gap:20px;padding:24px}
.feature-mini-icon{
  flex:0 0 48px;width:48px;height:48px;border-radius:var(--r-md);
  background:var(--c-primary-soft);color:var(--c-primary);display:grid;place-items:center;
}
.feature-mini h3{font-size:17px;line-height:1.5;font-weight:600;margin-bottom:6px}
.feature-mini p{font-size:14px;line-height:1.75;color:var(--c-ink-2);margin-bottom:8px}
.feature-mini .link-arrow{font-size:13px}

/* ---------- 截图轮播 ---------- */
.shot-wrap{position:relative}
.shot-track{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:8px;-webkit-overflow-scrolling:touch;scrollbar-width:none;
}
.shot-track::-webkit-scrollbar{display:none}
.shot-card{flex:0 0 320px;scroll-snap-align:start}
.shot-card img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-md);border:1px solid var(--c-line);background:#fff;
}
.shot-label{margin-top:14px;font-size:14px;font-weight:500;color:var(--c-ink)}
.shot-foot{display:flex;align-items:center;justify-content:space-between;margin-top:24px}
.dots{display:flex;gap:8px}
.dots i{width:8px;height:8px;border-radius:50%;background:var(--c-line);transition:background .18s,width .18s}
.dots i.active{background:var(--c-primary);width:20px;border-radius:var(--r-pill)}
.shot-arrows{display:flex;gap:8px}
.shot-arrows button{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--c-line);background:#fff;
  display:grid;place-items:center;color:var(--c-ink-2);transition:.18s;
}
.shot-arrows button:hover{border-color:var(--c-primary);color:var(--c-primary);box-shadow:var(--sh-1)}

/* ---------- 系统要求 ---------- */
.req-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.req-card{padding:32px}
.req-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.req-head .feature-mini-icon{flex:0 0 44px;width:44px;height:44px}
.req-head h3{font-size:22px;font-weight:600;line-height:1.4}
.req-row{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px dashed var(--c-line);font-size:15px}
.req-row:last-of-type{border-bottom:0}
.req-row .k{color:var(--c-ink-2)}
.req-row .v{font-family:var(--f-num);font-weight:700;color:var(--c-primary-dark);font-variant-numeric:tabular-nums;text-align:right}
.req-foot{margin-top:16px;padding-top:16px;border-top:1px solid var(--c-line);font-size:13px;color:var(--c-ink-3)}

/* ---------- 评价墙 ---------- */
.voice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.voice-card{position:relative;overflow:hidden;padding:20px}
.voice-grid .voice-card:nth-child(3n+2){margin-top:24px}
.voice-grid .voice-card:nth-child(3n){margin-top:48px}
.voice-head{display:flex;align-items:center;gap:12px}
.avatar{
  width:40px;height:40px;border-radius:50%;background:var(--c-primary-soft);
  color:var(--c-primary-dark);display:grid;place-items:center;font-size:15px;font-weight:600;flex:0 0 40px;
}
.voice-name{font-size:15px;font-weight:600;color:var(--c-ink)}
.voice-role{font-size:13px;color:var(--c-ink-3)}
.stars{margin-left:auto;color:var(--c-accent);font-size:13px;letter-spacing:1px;font-family:var(--f-num)}
.voice-text{margin-top:14px;font-size:15px;line-height:1.8;color:var(--c-ink-2)}
.voice-quote{
  position:absolute;right:10px;bottom:-10px;font-size:72px;line-height:1;
  color:#EDF4FD;font-family:Georgia,"Times New Roman",serif;pointer-events:none;
}

/* ---------- 下载区 ---------- */
.download{
  padding:96px 0;
  background-color:#EAF1FB;
  background-image:radial-gradient(rgba(31,107,214,.10) 1px,transparent 1px);
  background-size:18px 18px;
}
.dl-card{
  max-width:960px;margin:0 auto;background:#fff;border-radius:var(--r-xl);
  box-shadow:var(--sh-3);padding:40px;
}
.dl-card h2{font-size:30px;line-height:1.3;font-weight:700;text-align:center}
.dl-card .dl-sub{margin-top:12px;text-align:center;font-size:15px;color:var(--c-ink-2)}
.dl-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:32px}
.dl-btn{
  display:flex;align-items:center;gap:14px;min-width:220px;height:54px;
  padding:0 18px;border-radius:var(--r-md);background:var(--c-primary);color:#fff;
  transition:transform .18s ease-out,background .18s ease-out,box-shadow .18s ease-out;
}
.dl-btn:hover{background:var(--c-primary-dark);transform:translateY(-2px);box-shadow:var(--sh-2);color:#fff}
.dl-btn:active{transform:translateY(1px);box-shadow:none}
.dl-btn svg{flex:0 0 22px}
.dl-btn .t1{display:block;font-size:15px;font-weight:600;line-height:1.4}
.dl-btn .t2{display:block;font-size:12px;font-family:var(--f-num);color:rgba(255,255,255,.78);font-variant-numeric:tabular-nums}
.dl-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:32px;margin-top:32px}
.qr{text-align:center}
.qr-box{
  width:120px;height:120px;border:1px solid var(--c-line);border-radius:var(--r-md);
  background:#F8FAFD;display:grid;place-items:center;padding:10px;
  font-size:12px;color:var(--c-ink-3);line-height:1.6;
}
.qr p{margin-top:12px;font-size:12px;color:var(--c-ink-3)}
.dl-note{
  margin-top:24px;padding-top:20px;border-top:1px solid var(--c-line);
  font-size:13px;line-height:1.8;color:var(--c-ink-3);text-align:center;
}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{display:flex;flex-direction:column;overflow:hidden;color:inherit}
.news-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-bottom:1px solid var(--c-line);background:var(--c-primary-soft)}
.news-body{padding:20px;display:flex;flex-direction:column;flex:1}
.news-body h3{
  font-size:17px;line-height:1.5;font-weight:600;color:var(--c-ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s ease-out;
}
.news-card:hover .news-body h3{color:var(--c-primary)}
.news-desc{
  margin-top:10px;font-size:14px;line-height:1.75;color:var(--c-ink-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:16px;padding-top:14px;border-top:1px solid var(--c-line);
}
.news-time{font-family:var(--f-num);font-size:13px;color:var(--c-ink-3);font-variant-numeric:tabular-nums}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  background:var(--c-primary-soft);color:var(--c-primary-dark);font-size:12px;font-weight:500;
}
.empty-state{
  border:1px dashed #C6D8EF;border-radius:var(--r-lg);background:#FBFDFF;
  padding:48px 24px;text-align:center;
}
.empty-state .ico{
  width:56px;height:56px;margin:0 auto 16px;border-radius:var(--r-md);
  background:var(--c-primary-soft);color:var(--c-primary);display:grid;place-items:center;
}
.empty-state p{font-size:15px;color:var(--c-ink-2);margin-bottom:20px}

/* ---------- FAQ ---------- */
.faq{max-width:800px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  margin-bottom:12px;transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.faq-item.open{border-color:var(--c-primary);box-shadow:var(--sh-1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;text-align:left;font-size:17px;font-weight:600;color:var(--c-ink);
}
.faq-q:hover{color:var(--c-primary-dark)}
.faq-icon{
  flex:0 0 24px;width:24px;height:24px;border-radius:50%;
  background:var(--c-primary-soft);color:var(--c-primary);display:grid;place-items:center;
  font-size:16px;line-height:1;transition:transform .2s ease-out,background .2s,color .2s;
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--c-primary);color:#fff}
.faq-a{max-height:0;opacity:0;overflow:hidden;transition:max-height .22s ease-out,opacity .22s ease-out}
.faq-item.open .faq-a{max-height:420px;opacity:1}
.faq-a p{padding:0 24px 20px;font-size:15px;line-height:1.85;color:var(--c-ink-2)}

/* ---------- 收尾 CTA ---------- */
.endcta{background:var(--c-primary-soft)}
.endcta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;min-height:160px;padding:32px 0}
.endcta h2{font-size:22px;line-height:1.5;font-weight:600;color:var(--c-ink)}
.endcta p{margin-top:8px;font-size:15px;color:var(--c-ink-2)}
.endcta-actions{display:flex;gap:16px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-footer);color:rgba(255,255,255,.7);padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:4fr 2fr 2fr 2fr 2fr;gap:32px}
.footer-brand .brand{color:#fff}
.footer-brand .brand-mark{background:var(--c-primary)}
.footer-about{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:300px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col a{display:block;font-size:14px;line-height:2;color:rgba(255,255,255,.7);transition:color .18s}
.footer-col a:hover{color:#fff;text-decoration:underline}
.footer-qr{
  width:96px;height:96px;border-radius:var(--r-md);border:1px solid rgba(255,255,255,.18);
  display:grid;place-items:center;font-size:12px;color:rgba(255,255,255,.5);
  text-align:center;padding:8px;line-height:1.5;
}
.footer-contact{margin-top:12px;font-size:13px;color:rgba(255,255,255,.55);line-height:1.8}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px 32px;font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom span{margin-right:auto}

/* ---------- 吸底条 ---------- */
.mobile-bar{display:none}

@media (max-width:1279px){
  .hero h1{font-size:38px}
}
@media (max-width:1023px){
  .section,.download{padding:72px 0}
  .hero{padding:64px 0}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-sub{max-width:100%}
  .hero-visual img{max-width:520px;margin:0 auto}
  .nav,.header-actions .search,.header-actions .btn{display:none}
  .hamburger{display:flex}
  .feature-grid{grid-template-columns:1fr;grid-template-rows:auto}
  .feature-main{grid-row:auto}
  .feature-main img{aspect-ratio:16/7}
  .req-grid{grid-template-columns:1fr}
  .voice-grid{grid-template-columns:repeat(2,1fr)}
  .voice-grid .voice-card{margin-top:0!important}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .dl-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 24px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  body{padding-bottom:56px}
  .container{padding:0 16px}
  .section,.download{padding:56px 0}
  .hero{padding:56px 0}
  .hero h1{font-size:30px}
  .hero-cta .btn{width:100%}
  .trustbar-inner{flex-wrap:wrap;padding:8px 0}
  .trust-item{flex:0 0 50%;justify-content:flex-start;padding:10px 0}
  .trust-item + .trust-item{border-left:0}
  .trust-item:nth-child(even){border-left:1px solid var(--c-line);padding-left:16px}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:32px}
  .section-head h2,.dl-card h2{font-size:24px}
  .shot-card{flex:0 0 260px}
  .shot-arrows{display:none}
  .voice-grid,.news-grid{grid-template-columns:1fr}
  .dl-card{padding:24px 16px}
  .dl-grid{margin-top:24px}
  .dl-btn{min-width:0;width:100%}
  .news-body{padding:16px}
  .endcta-inner{flex-direction:column;align-items:flex-start;justify-content:center;min-height:0;padding:40px 0}
  .endcta-actions{width:100%}
  .endcta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .mobile-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;height:56px;z-index:70;
    align-items:center;gap:12px;padding:0 16px;
    background:rgba(255,255,255,.97);border-top:1px solid var(--c-line);
    backdrop-filter:blur(8px);
  }
  .mobile-bar .mb-text{font-size:13px;line-height:1.35;color:var(--c-ink-2)}
  .mobile-bar .mb-text b{display:block;font-family:var(--f-num);color:var(--c-ink);font-size:13px}
  .mobile-bar .btn{margin-left:auto;height:44px}
}
@media (max-width:479px){
  .hero h1{font-size:28px}
  .hero-badge{font-size:12px}
  .feature-main-body,.feature-mini{padding:16px}
  .req-card,.dl-card{padding:20px 16px}
  .faq-q{padding:16px;font-size:16px}
  .faq-a p{padding:0 16px 16px}
}

/* roulang page: article */
:root{
  --c-primary:#1F6BD6;
  --c-primary-dark:#14509F;
  --c-primary-soft:#E9F1FD;
  --c-accent:#E9A23B;
  --c-bg:#F6F9FC;
  --c-surface:#FFFFFF;
  --c-line:#E4ECF4;
  --c-ink:#22303F;
  --c-ink-2:#55677A;
  --c-ink-3:#8A9AAB;
  --c-footer:#0E2138;
  --c-ok:#2E9E6B;
  --c-err:#D9534F;
  --f-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  --f-num:ui-monospace,"DIN Alternate",Menlo,Consolas,"Courier New",monospace;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,50,86,.05);
  --sh-2:0 8px 24px -14px rgba(20,50,86,.16);
  --sh-3:0 18px 44px -20px rgba(20,50,86,.24);
  --sh-focus:0 0 0 4px rgba(31,107,214,.16);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--f-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:none;box-shadow:var(--sh-focus);border-radius:var(--r-sm);}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}
.num{font-family:var(--f-num);font-variant-numeric:tabular-nums;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .18s ease-out;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.header-inner{display:flex;align-items:center;gap:24px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;transition:opacity .18s ease-out;}
.brand:hover{opacity:.86;}
.brand-mark{
  width:32px;height:32px;border-radius:var(--r-sm);
  background:var(--c-primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;letter-spacing:.4px;
}
.brand-text{font-size:16px;font-weight:600;color:var(--c-ink);white-space:nowrap;}
.nav{display:flex;align-items:center;gap:28px;flex:1 1 auto;}
.nav a{
  position:relative;font-size:15px;font-weight:500;color:var(--c-ink-2);
  padding:22px 0;transition:color .18s ease-out;
}
.nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;
  background:var(--c-primary);border-radius:2px;transform:scaleX(0);
  transform-origin:center;transition:transform .18s ease-out;
}
.nav a:hover{color:var(--c-primary);}
.nav a:hover::after,.nav a.active::after{transform:scaleX(1);}
.nav a.active{color:var(--c-primary);}
.header-right{display:flex;align-items:center;gap:12px;flex:0 0 auto;margin-left:auto;}
.search{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 16px;min-width:210px;
  background:#F2F6FA;border:1px solid transparent;border-radius:var(--r-pill);
  transition:background .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.search svg{width:16px;height:16px;stroke:var(--c-ink-3);fill:none;flex:0 0 auto;}
.search input{
  border:0;background:transparent;outline:none;width:100%;
  font-size:14px;color:var(--c-ink);
}
.search input::placeholder{color:var(--c-ink-3);}
.search:focus-within{background:#fff;border-color:var(--c-primary);box-shadow:var(--sh-focus);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;cursor:pointer;
  border-radius:var(--r-md);font-weight:600;
  transition:background .18s ease-out,color .18s ease-out,transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.btn-primary{background:var(--c-primary);color:#fff;}
.btn-primary:hover{background:var(--c-primary-dark);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-line);}
.btn-ghost:hover{border-color:var(--c-primary);background:var(--c-primary-soft);}
.btn-sm{height:40px;padding:0 20px;border-radius:var(--r-pill);font-size:14px;}
.btn-lg{height:54px;padding:0 28px;font-size:16px;}
.btn-block{width:100%;}
.hamburger{
  display:none;width:44px;height:44px;border:1px solid var(--c-line);
  background:#fff;border-radius:var(--r-md);cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px;transition:transform .2s ease-out,opacity .2s ease-out;}
.hamburger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.is-open span:nth-child(2){opacity:0;}
.hamburger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,33,56,.42);z-index:90;
  opacity:0;pointer-events:none;transition:opacity .22s ease-out;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82%;max-width:340px;
  background:#fff;z-index:91;padding:20px;
  transform:translateX(102%);transition:transform .26s ease-out;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--c-line);background:#fff;
  border-radius:var(--r-md);cursor:pointer;font-size:18px;color:var(--c-ink-2);
}
.drawer-nav{display:flex;flex-direction:column;margin:4px 0 20px;}
.drawer-nav a{
  display:block;padding:15px 0;font-size:16px;font-weight:500;color:var(--c-ink);
  border-bottom:1px solid var(--c-line);
}
.drawer-nav a.active{color:var(--c-primary);border-left:3px solid var(--c-primary);padding-left:12px;}
.drawer .search{min-width:0;width:100%;margin-bottom:12px;}

/* ---------- Breadcrumb + Article head ---------- */
.page-top{
  background:linear-gradient(180deg,#EFF5FD 0%,rgba(246,249,252,0) 100%);
  border-bottom:1px solid var(--c-line);
  padding:20px 0 40px;
}
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--c-ink-3);}
.crumbs a{color:var(--c-ink-3);transition:color .18s ease-out;}
.crumbs a:hover{color:var(--c-primary);}
.crumbs .sep{color:#BCC9D6;}
.crumbs .current{color:var(--c-ink-2);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.article-head{margin-top:28px;max-width:820px;}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  background:var(--c-primary-soft);color:var(--c-primary);
  font-size:13px;font-weight:600;
}
.chip-accent{background:#FDF3E2;color:#B4741B;}
.article-head h1{
  margin:16px 0 14px;
  font-size:34px;line-height:1.32;font-weight:700;letter-spacing:.01em;color:var(--c-ink);
}
.meta-row{display:flex;align-items:center;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--c-ink-3);}
.meta-dot{color:#C6D3E0;}
.meta-row time{font-family:var(--f-num);}

/* ---------- Layout ---------- */
.layout{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;
  gap:48px;align-items:start;
  padding:48px 0 72px;
}
.article-card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-lg);box-shadow:var(--sh-2);
  padding:40px;
}
.article-body{font-size:17px;line-height:1.9;color:#33414F;word-wrap:break-word;overflow-wrap:break-word;}
.article-body p{margin:0 0 20px;}
.article-body h2{
  position:relative;font-size:24px;line-height:1.4;font-weight:700;color:var(--c-ink);
  margin:40px 0 16px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;
  border-radius:2px;background:var(--c-primary);
}
.article-body h3{font-size:20px;line-height:1.5;font-weight:600;color:var(--c-ink);margin:32px 0 12px;}
.article-body h4{font-size:17px;font-weight:600;color:var(--c-ink);margin:24px 0 10px;}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:8px;}
.article-body ul li::marker{color:var(--c-primary);}
.article-body ol li::marker{color:var(--c-primary);font-weight:600;}
.article-body blockquote{
  margin:24px 0;padding:18px 20px;background:var(--c-primary-soft);
  border-left:3px solid var(--c-primary);border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--c-ink-2);font-size:16px;
}
.article-body img{max-width:100%;height:auto;border-radius:var(--r-md);margin:24px auto;}
.article-body a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--c-primary-dark);}
.article-body table{
  display:block;width:100%;overflow-x:auto;border-collapse:collapse;
  margin:24px 0;font-size:15px;
}
.article-body th,.article-body td{border:1px solid var(--c-line);padding:10px 14px;text-align:left;vertical-align:top;}
.article-body th{background:var(--c-primary-soft);font-weight:600;color:var(--c-ink);}
.article-body code{
  font-family:var(--f-num);font-size:13px;background:#F1F5FA;color:var(--c-primary-dark);
  padding:2px 6px;border-radius:var(--r-sm);
}
.article-body pre{
  background:var(--c-footer);color:#DCE6F2;padding:16px 18px;border-radius:var(--r-md);
  overflow-x:auto;margin:24px 0;font-family:var(--f-num);font-size:13px;line-height:1.7;
}
.article-body pre code{background:none;color:inherit;padding:0;font-size:13px;}
.article-body hr{border:0;border-top:1px solid var(--c-line);margin:32px 0;}
.article-body figure{margin:24px 0;}
.article-body figcaption,
.article-body .caption{font-size:13px;color:var(--c-ink-3);text-align:center;margin-top:8px;}

.notice{
  border:1px dashed #C6D3E0;border-radius:var(--r-lg);
  padding:48px 24px;text-align:center;background:#FBFDFF;
}
.notice-icon{
  width:48px;height:48px;border-radius:50%;background:var(--c-primary-soft);
  color:var(--c-primary);display:flex;align-items:center;justify-content:center;
  margin:0 auto 16px;font-size:22px;font-weight:700;font-family:var(--f-num);
}
.notice h2{font-size:20px;font-weight:600;color:var(--c-ink);margin-bottom:8px;}
.notice p{font-size:15px;color:var(--c-ink-2);margin-bottom:24px;}

/* ---------- Download guidance ---------- */
.dl-card{
  margin-top:32px;background:var(--c-primary-soft);
  border:1px solid #D6E4F9;border-radius:var(--r-lg);
  padding:32px;display:flex;align-items:center;gap:32px;flex-wrap:wrap;
}
.dl-card .dl-text{flex:1 1 320px;}
.dl-card h2{font-size:22px;font-weight:600;color:var(--c-ink);margin-bottom:8px;}
.dl-card p{font-size:15px;color:var(--c-ink-2);}
.dl-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- Related ---------- */
.section-block{padding:0 0 72px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px;}
.section-head h2{font-size:24px;font-weight:700;color:var(--c-ink);}
.section-head .link{
  font-size:14px;font-weight:600;color:var(--c-primary);
  display:inline-flex;align-items:center;gap:6px;
}
.section-head .link:hover{color:var(--c-primary-dark);}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.rel-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-2);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
  display:flex;flex-direction:column;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-3);border-color:#CBDDF5;}
.rel-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.rel-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-body h3{font-size:17px;line-height:1.6;font-weight:600;color:var(--c-ink);}
.rel-card:hover .rel-body h3{color:var(--c-primary);}
.rel-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;font-size:13px;color:var(--c-ink-3);}
.rel-foot time{font-family:var(--f-num);}
.back-row{margin-top:32px;}

/* ---------- Sidebar ---------- */
.sidebar{display:flex;flex-direction:column;gap:24px;position:sticky;top:92px;}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-lg);box-shadow:var(--sh-2);padding:24px;
}
.side-card h3{font-size:17px;font-weight:600;color:var(--c-ink);margin-bottom:16px;}
.side-download{background:var(--c-footer);border-color:#17314F;color:#fff;}
.side-download h3{color:#fff;}
.side-download .ver{
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.66);padding-bottom:14px;
  border-bottom:1px dashed rgba(255,255,255,.16);margin-bottom:16px;
}
.side-download .ver b{font-family:var(--f-num);color:var(--c-accent);font-weight:700;}
.side-status{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.7);margin-bottom:16px;}
.dot{width:8px;height:8px;border-radius:50%;background:var(--c-ok);flex:0 0 auto;}
.side-list{display:flex;flex-direction:column;}
.side-list a{
  display:block;padding:12px 0;border-bottom:1px solid var(--c-line);
  font-size:15px;color:var(--c-ink-2);transition:color .18s ease-out;
}
.side-list a:last-child{border-bottom:0;}
.side-list a:hover{color:var(--c-primary);}
.side-list span{display:block;font-family:var(--f-num);font-size:12px;color:var(--c-ink-3);margin-top:4px;}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;}
.tag-cloud a{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;
  border-radius:var(--r-pill);background:var(--c-primary-soft);color:var(--c-primary);
  font-size:13px;font-weight:500;transition:background .18s ease-out,color .18s ease-out;
}
.tag-cloud a:hover{background:var(--c-primary);color:#fff;}
.side-note{font-size:13px;color:var(--c-ink-3);line-height:1.7;}

/* ---------- Closing CTA ---------- */
.closing{
  background:var(--c-primary-soft);border-top:1px solid #D9E7FA;
  padding:40px 0;
}
.closing-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;}
.closing p{font-size:17px;font-weight:600;color:var(--c-ink);}
.closing .sub{font-size:14px;font-weight:400;color:var(--c-ink-2);margin-top:6px;}
.closing-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- Footer ---------- */
.site-footer{background:var(--c-footer);color:#fff;padding:64px 0 32px;margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1.2fr;gap:32px;
  padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-mark{background:var(--c-primary);}
.footer-brand .brand-text{color:#fff;}
.footer-about{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:34ch;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col a{
  display:block;font-size:14px;color:rgba(255,255,255,.7);
  padding:5px 0;transition:color .18s ease-out;
}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.footer-qr{
  width:120px;height:120px;border:1px solid rgba(255,255,255,.2);border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:12px;color:rgba(255,255,255,.6);line-height:1.6;margin-bottom:12px;
}
.footer-contact{font-size:13px;color:rgba(255,255,255,.6);line-height:1.8;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;
  padding-top:24px;font-size:13px;color:rgba(255,255,255,.52);
}
.footer-bottom span{font-family:var(--f-sans);}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  .layout{gap:32px;grid-template-columns:minmax(0,1fr) 300px;}
}
@media (max-width:1023px){
  .nav{display:none;}
  .search{display:none;}
  .hamburger{display:flex;}
  .layout{grid-template-columns:minmax(0,1fr);gap:0;padding:32px 0 56px;}
  .sidebar{display:none;}
  .article-card{padding:28px;}
  .rel-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .header-inner{height:64px;gap:12px;}
  .btn-sm{height:44px;padding:0 18px;}
  .page-top{padding:16px 0 32px;}
  .article-head h1{font-size:26px;}
  .article-card{padding:20px;border-radius:var(--r-md);}
  .article-body{font-size:16px;line-height:1.85;}
  .article-body h2{font-size:21px;margin-top:32px;}
  .article-body h3{font-size:18px;}
  .rel-grid{grid-template-columns:1fr;}
  .dl-card{padding:24px 20px;}
  .closing{padding:32px 0;}
  .closing-actions,.dl-actions{width:100%;}
  .closing-actions .btn,.dl-actions .btn{flex:1 1 100%;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:479px){
  .brand-text{font-size:15px;}
  .crumbs .current{max-width:22ch;}
  .article-head h1{font-size:23px;line-height:1.36;}
  .article-card{padding:16px;}
}

/* roulang page: category1 */
:root{
  --c-primary:#1F6BD6;
  --c-primary-dark:#14509F;
  --c-primary-soft:#E9F1FD;
  --c-accent:#E9A23B;
  --c-bg:#F6F9FC;
  --c-surface:#FFFFFF;
  --c-line:#E4ECF4;
  --c-ink:#22303F;
  --c-ink-2:#55677A;
  --c-ink-3:#8A9AAB;
  --c-footer:#0E2138;
  --c-success:#2E9E6B;
  --c-danger:#D9534F;
  --f-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  --f-num:ui-monospace,"DIN Alternate",Menlo,Consolas,monospace;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,50,86,.05);
  --sh-2:0 8px 24px -14px rgba(20,50,86,.16);
  --sh-3:0 18px 44px -20px rgba(20,50,86,.24);
  --sh-focus:0 0 0 4px rgba(31,107,214,.16);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--f-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
input{font-family:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:0;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
.num{font-family:var(--f-num);font-variant-numeric:tabular-nums;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-head h2{font-size:30px;font-weight:700;}
.section-head .sub{margin-top:12px;color:var(--c-ink-2);font-size:15px;max-width:640px;}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:15px;font-weight:600;white-space:nowrap;}
.text-link:hover{color:var(--c-primary-dark);}
.text-link::after{content:"→";transition:transform .18s ease-out;}
.text-link:hover::after{transform:translateX(3px);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .18s ease-out,background-color .18s ease-out,box-shadow .18s ease-out,color .18s ease-out;
  white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-2);}
.btn-primary:hover{background:var(--c-primary-dark);transform:translateY(-1px);box-shadow:var(--sh-3);}
.btn-primary:active{transform:translateY(1px);box-shadow:var(--sh-1);}
.btn-ghost{background:#fff;color:var(--c-ink);border-color:var(--c-line);}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-1px);}
.btn-soft{background:var(--c-primary-soft);color:var(--c-primary-dark);}
.btn-soft:hover{background:#dbe8fb;transform:translateY(-1px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:var(--r-pill);}
.btn:focus-visible{outline:none;box-shadow:var(--sh-focus);}
.btn[disabled]{background:#C6D3E0;color:#fff;cursor:not-allowed;box-shadow:none;transform:none;}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;
  border-radius:var(--r-pill);background:var(--c-primary-soft);color:var(--c-primary-dark);
  font-size:13px;font-weight:600;
}
.badge--accent{background:#FDF3E3;color:#A96B12;}
.pill{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  background:#FDF3E3;color:#A96B12;font-family:var(--f-num);font-size:13px;font-weight:700;
}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:60;height:68px;
  background:rgba(255,255,255,.94);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s ease-out;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.header-inner{display:flex;align-items:center;gap:24px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:600;color:var(--c-ink);}
.brand-mark{
  width:32px;height:32px;border-radius:var(--r-sm);background:var(--c-primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;letter-spacing:.02em;
  font-family:var(--f-num);flex:0 0 auto;
}
.brand:hover .brand-mark{background:var(--c-primary-dark);}
.nav{display:flex;align-items:center;gap:28px;margin-left:16px;}
.nav a{
  position:relative;font-size:15px;font-weight:500;color:var(--c-ink-2);
  padding:22px 0;transition:color .18s ease-out;
}
.nav a:hover{color:var(--c-primary);}
.nav a.active{color:var(--c-ink);font-weight:600;}
.nav a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:16px;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.header-tools{margin-left:auto;display:flex;align-items:center;gap:12px;}
.search{
  display:flex;align-items:center;gap:8px;height:40px;padding:0 16px;
  background:#F2F6FA;border:1px solid transparent;border-radius:var(--r-pill);
  transition:background-color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.search:focus-within{background:#fff;border-color:var(--c-primary);box-shadow:var(--sh-focus);}
.search svg{width:16px;height:16px;flex:0 0 auto;color:var(--c-ink-3);}
.search input{
  border:0;background:transparent;outline:none;font-size:14px;color:var(--c-ink);width:150px;
}
.search input::placeholder{color:var(--c-ink-3);}
.hamburger{
  display:none;width:44px;height:44px;border:1px solid var(--c-line);background:#fff;
  border-radius:var(--r-md);cursor:pointer;padding:0;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82%;max-width:340px;background:#fff;z-index:80;
  transform:translateX(100%);transition:transform .24s ease-out;
  padding:20px;display:flex;flex-direction:column;gap:20px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--c-line);background:#fff;border-radius:var(--r-md);
  cursor:pointer;font-size:20px;line-height:1;color:var(--c-ink-2);
}
.drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--c-line);}
.drawer-nav a{
  display:flex;align-items:center;min-height:52px;font-size:16px;color:var(--c-ink-2);
  border-bottom:1px solid var(--c-line);padding-left:12px;
}
.drawer-nav a.active{color:var(--c-primary);font-weight:600;box-shadow:inset 3px 0 0 var(--c-primary);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,33,56,.4);z-index:70;opacity:0;visibility:hidden;
  transition:opacity .24s ease-out,visibility .24s ease-out;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ============ 分类页 Hero ============ */
.page-hero{
  position:relative;
  background:linear-gradient(180deg,#F3F8FE 0%,#F6F9FC 100%);
  border-bottom:1px solid var(--c-line);
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center right;
  opacity:.14;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(31,107,214,.13) 1px,transparent 1px);
  background-size:22px 22px;
  opacity:.5;
}
.page-hero .container{position:relative;z-index:2;}
.hero-grid{
  display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;
  padding:64px 0;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-ink-3);margin-bottom:20px;}
.breadcrumb a{color:var(--c-ink-3);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb span.sep{color:#C3D0DC;}
.page-hero h1{font-size:36px;font-weight:700;line-height:1.28;margin-top:16px;}
.page-hero h1 em{font-style:normal;color:var(--c-primary-dark);}
.hero-lead{margin-top:16px;font-size:16px;color:var(--c-ink-2);max-width:600px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:24px;margin-top:28px;padding-top:24px;
  border-top:1px dashed var(--c-line);
}
.hero-meta div{display:flex;flex-direction:column;gap:2px;}
.hero-meta .k{font-size:13px;color:var(--c-ink-3);}
.hero-meta .v{font-family:var(--f-num);font-size:16px;font-weight:700;color:var(--c-ink);}
.hero-visual{
  border-radius:var(--r-xl);overflow:hidden;border:1px solid var(--c-line);
  box-shadow:var(--sh-3);background:#fff;
}
.hero-visual img{width:100%;aspect-ratio:16/11;object-fit:cover;}
.hero-version{
  margin-top:-36px;margin-left:24px;margin-right:24px;position:relative;z-index:2;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-2);padding:16px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.hero-version .label{font-size:13px;color:var(--c-ink-3);}
.hero-version .value{font-family:var(--f-num);font-size:20px;font-weight:700;color:var(--c-primary);}

/* ============ 数据条 ============ */
.stats{background:#fff;border-bottom:1px solid var(--c-line);}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.stat{
  padding:20px 24px;display:flex;flex-direction:column;gap:2px;
  border-left:1px solid var(--c-line);
}
.stat:first-child{border-left:0;}
.stat .n{font-family:var(--f-num);font-size:20px;font-weight:700;color:var(--c-primary);}
.stat .t{font-size:13px;color:var(--c-ink-3);}

/* ============ 通用卡片 ============ */
.card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-2);transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-3);border-color:#CFE0F6;}

/* ============ 功能特性（非对称 2+1） ============ */
.feature-grid{display:grid;grid-template-columns:7fr 5fr;grid-auto-rows:minmax(0,auto);gap:24px;}
.feature-main{
  grid-row:span 2;overflow:hidden;display:flex;flex-direction:column;
}
.feature-main img{width:100%;aspect-ratio:16/9;object-fit:cover;border-bottom:1px solid var(--c-line);}
.feature-body{padding:28px;display:flex;flex-direction:column;gap:12px;}
.feature-body h3{font-size:22px;font-weight:600;}
.feature-body p{font-size:15px;color:var(--c-ink-2);}
.feature-mini{
  padding:24px;display:flex;gap:16px;align-items:flex-start;
}
.feature-mini img{
  width:96px;height:96px;border-radius:var(--r-md);object-fit:cover;flex:0 0 auto;
}
.feature-mini .txt{display:flex;flex-direction:column;gap:8px;}
.feature-mini h3{font-size:17px;font-weight:600;}
.feature-mini p{font-size:14px;color:var(--c-ink-2);line-height:1.75;}
.feature-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px;}
.feature-list span{
  font-size:13px;color:var(--c-ink-2);background:var(--c-bg);border:1px solid var(--c-line);
  border-radius:var(--r-pill);padding:3px 10px;
}

/* ============ 适用场景 ============ */
.scene-wrap{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.scene-card{padding:28px;display:flex;gap:16px;align-items:flex-start;}
.scene-num{
  width:40px;height:40px;flex:0 0 auto;border-radius:var(--r-md);background:var(--c-primary-soft);
  color:var(--c-primary);display:flex;align-items:center;justify-content:center;
  font-family:var(--f-num);font-size:16px;font-weight:700;
}
.scene-card h3{font-size:17px;font-weight:600;margin-bottom:8px;}
.scene-card p{font-size:15px;color:var(--c-ink-2);}
.scene-card .scene-tags{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px;}
.scene-tags span{font-size:13px;color:var(--c-primary-dark);background:var(--c-primary-soft);border-radius:var(--r-sm);padding:3px 8px;}

/* ============ 版本时间线 ============ */
.timeline{position:relative;max-width:920px;}
.timeline::before{
  content:"";position:absolute;left:147px;top:8px;bottom:8px;width:1px;background:var(--c-line);
}
.tl-item{display:grid;grid-template-columns:132px 1fr;gap:32px;padding:0 0 32px;position:relative;}
.tl-item:last-child{padding-bottom:0;}
.tl-date{
  font-family:var(--f-num);font-size:14px;font-weight:700;color:var(--c-ink-2);
  text-align:right;padding-top:20px;
}
.tl-item::after{
  content:"";position:absolute;left:141px;top:26px;width:11px;height:11px;border-radius:50%;
  background:#fff;border:2px solid var(--c-primary);
}
.tl-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-2);padding:24px;transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.tl-card:hover{transform:translateY(-2px);box-shadow:var(--sh-3);border-color:#CFE0F6;}
.tl-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:10px;}
.tl-head h3{font-size:17px;font-weight:600;}
.tl-card p{font-size:15px;color:var(--c-ink-2);}
.tl-card ul{margin-top:12px;display:flex;flex-direction:column;gap:6px;}
.tl-card li{
  font-size:14px;color:var(--c-ink-2);padding-left:16px;position:relative;
}
.tl-card li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--c-primary);
}

/* ============ 平台对照 ============ */
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.spec-card{padding:28px;display:flex;flex-direction:column;}
.spec-head{display:flex;align-items:center;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--c-line);}
.spec-icon{
  width:40px;height:40px;border-radius:var(--r-md);background:var(--c-primary-soft);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-family:var(--f-num);font-weight:700;font-size:14px;
}
.spec-head h3{font-size:17px;font-weight:600;}
.spec-rows{margin-top:8px;}
.spec-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:12px 0;border-bottom:1px dashed var(--c-line);font-size:15px;
}
.spec-row:last-child{border-bottom:0;}
.spec-row .k{color:var(--c-ink-2);}
.spec-row .v{font-family:var(--f-num);font-weight:700;color:var(--c-primary-dark);text-align:right;}
.spec-foot{margin-top:auto;padding-top:16px;font-size:13px;color:var(--c-ink-3);}

/* ============ 下载 ============ */
.download-block{
  position:relative;background:#EAF1FB;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);
  padding:80px 0;
}
.download-block::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(31,107,214,.16) 1px,transparent 1px);
  background-size:20px 20px;opacity:.45;
}
.download-card{
  position:relative;background:#fff;border-radius:var(--r-xl);box-shadow:var(--sh-3);
  max-width:960px;margin:0 auto;padding:40px;border:1px solid var(--c-line);
}
.download-card h2{font-size:30px;}
.download-card .dl-sub{margin-top:12px;font-size:15px;color:var(--c-ink-2);}
.dl-body{display:grid;grid-template-columns:1fr 160px;gap:32px;margin-top:28px;align-items:start;}
.dl-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.dl-btn{
  display:flex;align-items:center;gap:12px;min-width:220px;height:54px;padding:0 18px;
  background:var(--c-primary);color:#fff;border-radius:var(--r-md);border:0;cursor:pointer;
  transition:background-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
  text-align:left;
}
.dl-btn:hover{background:var(--c-primary-dark);transform:translateY(-1px);box-shadow:var(--sh-3);}
.dl-btn:active{transform:translateY(1px);}
.dl-btn:focus-visible{outline:none;box-shadow:var(--sh-focus);}
.dl-btn .ic{
  width:22px;height:22px;flex:0 0 auto;border-radius:6px;background:rgba(255,255,255,.2);
  display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;font-family:var(--f-num);
}
.dl-btn .txt{display:flex;flex-direction:column;line-height:1.35;}
.dl-btn .txt strong{font-size:15px;font-weight:600;}
.dl-btn .txt small{font-size:12px;font-family:var(--f-num);opacity:.85;}
.dl-qr{
  width:120px;height:120px;border:1px solid var(--c-line);border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:12px;color:var(--c-ink-3);background:repeating-linear-gradient(45deg,#fff,#fff 6px,#F6F9FC 6px,#F6F9FC 12px);
}
.dl-qr-note{margin-top:12px;font-size:12px;color:var(--c-ink-3);line-height:1.6;}
.dl-foot{margin-top:24px;padding-top:20px;border-top:1px solid var(--c-line);font-size:13px;color:var(--c-ink-3);}

/* ============ FAQ ============ */
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  transition:border-color .2s ease-out,box-shadow .2s ease-out;overflow:hidden;
}
.faq-item[open]{border-color:var(--c-primary);box-shadow:var(--sh-2);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 24px;display:flex;align-items:center;gap:16px;
  font-size:17px;font-weight:600;color:var(--c-ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::before{
  content:"";flex:0 0 auto;width:18px;height:18px;border-radius:6px;background:var(--c-primary-soft);
  background-image:linear-gradient(var(--c-primary),var(--c-primary)),linear-gradient(var(--c-primary),var(--c-primary));
  background-size:10px 2px,2px 10px;background-position:center;background-repeat:no-repeat;
  transition:transform .2s ease-out;
}
.faq-item[open] summary::before{transform:rotate(45deg);}
.faq-item .answer{padding:0 24px 22px 58px;font-size:15px;line-height:1.8;color:var(--c-ink-2);}
.faq-item summary:focus-visible{outline:none;box-shadow:var(--sh-focus);}

/* ============ 收尾 CTA ============ */
.closing{
  background:var(--c-primary-soft);border-top:1px solid var(--c-line);
}
.closing-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;padding:44px 0;
}
.closing h2{font-size:22px;font-weight:600;}
.closing p{margin-top:8px;font-size:15px;color:var(--c-ink-2);}
.closing-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ Footer ============ */
.site-footer{background:var(--c-footer);color:rgba(255,255,255,.82);padding:64px 0 32px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:4fr 2fr 2fr 2fr 2fr;gap:32px;}
.footer-brand .brand{color:#fff;margin-bottom:16px;}
.footer-brand .brand-mark{background:var(--c-primary);}
.footer-about{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px;}
.footer-col{display:flex;flex-direction:column;}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin:0 0 16px;}
.footer-col a{
  font-size:14px;color:rgba(255,255,255,.7);padding:6px 0;
  transition:color .18s ease-out;
}
.footer-col a:hover{color:#fff;text-decoration:underline;}
.footer-qr{
  width:104px;height:104px;border:1px solid rgba(255,255,255,.18);border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:center;text-align:center;font-size:12px;
  color:rgba(255,255,255,.6);line-height:1.6;background:rgba(255,255,255,.04);
}
.footer-contact{margin-top:12px;font-size:13px;line-height:1.8;color:rgba(255,255,255,.6);}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ============ 移动下载条 ============ */
.mobile-bar{display:none;}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .search input{width:120px;}
}
@media (max-width:1023px){
  .nav{display:none;}
  .hamburger{display:flex;}
  .search{display:none;}
  .section{padding:72px 0;}
  .section--tight{padding:56px 0;}
  .hero-grid{grid-template-columns:1fr;gap:32px;padding:56px 0;}
  .page-hero h1{font-size:32px;}
  .hero-visual{max-width:520px;margin:0 auto;}
  .feature-grid{grid-template-columns:1fr;}
  .feature-main{grid-row:auto;}
  .scene-wrap{grid-template-columns:1fr;}
  .spec-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr 1fr;}
  .footer-brand{grid-column:1 / -1;}
  .dl-body{grid-template-columns:1fr;}
  .dl-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .section--tight{padding:48px 0;}
  .stats-grid{grid-template-columns:1fr 1fr;}
  .stat{border-left:0;border-top:1px solid var(--c-line);}
  .stat:nth-child(-n+2){border-top:0;}
  .stat:nth-child(even){border-left:1px solid var(--c-line);}
  .timeline::before{left:7px;}
  .tl-item{grid-template-columns:1fr;gap:12px;padding-left:32px;padding-bottom:24px;}
  .tl-item::after{left:2px;top:6px;}
  .tl-date{text-align:left;padding-top:0;}
  .download-block{padding:56px 0;}
  .download-card{padding:24px;}
  .dl-grid{grid-template-columns:1fr;}
  .dl-btn{min-width:0;width:100%;}
  .closing-inner{flex-direction:column;align-items:flex-start;padding:40px 0;}
  .closing-actions{width:100%;}
  .closing-actions .btn{flex:1 1 100%;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .hero-actions .btn{flex:1 1 100%;}
  .mobile-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:55;height:56px;
    padding:8px 16px;gap:12px;align-items:center;justify-content:space-between;
    background:rgba(255,255,255,.97);border-top:1px solid var(--c-line);
    box-shadow:0 -6px 20px -12px rgba(20,50,86,.3);
    padding-bottom:calc(8px + env(safe-area-inset-bottom));
  }
  .mobile-bar .mb-txt{display:flex;flex-direction:column;line-height:1.25;}
  .mobile-bar .mb-txt strong{font-size:14px;font-weight:600;}
  .mobile-bar .mb-txt span{font-size:12px;color:var(--c-ink-3);font-family:var(--f-num);}
  .mobile-bar .btn{height:40px;padding:0 18px;border-radius:var(--r-pill);}
  .site-footer{padding-bottom:88px;}
}
@media (max-width:479px){
  .page-hero h1{font-size:28px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .feature-mini{flex-direction:column;padding:16px;}
  .feature-mini img{width:100%;height:auto;aspect-ratio:16/9;}
  .faq-item summary{padding:16px;font-size:16px;}
  .faq-item .answer{padding:0 16px 18px 50px;}
  .dl-btn{height:auto;padding:14px 16px;min-height:54px;}
}

/* roulang page: category2 */
:root{
  --c-primary:#1F6BD6;
  --c-primary-dark:#14509F;
  --c-primary-soft:#E9F1FD;
  --c-accent:#E9A23B;
  --c-bg:#F6F9FC;
  --c-surface:#FFFFFF;
  --c-line:#E4ECF4;
  --c-ink:#22303F;
  --c-ink-2:#55677A;
  --c-ink-3:#8A9AAB;
  --c-footer:#0E2138;
  --c-ok:#2E9E6B;
  --c-err:#D9534F;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,50,86,.05);
  --sh-2:0 8px 24px -14px rgba(20,50,86,.16);
  --sh-3:0 18px 44px -20px rgba(20,50,86,.24);
  --sh-focus:0 0 0 4px rgba(31,107,214,.16);
  --f-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  --f-num:ui-monospace,"DIN Alternate",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(--f-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--c-primary-dark)}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0}
button{font:inherit;cursor:pointer;border:0;background:none}
input{font:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--f-num);font-variant-numeric:tabular-nums}
.section{padding:96px 0}
.section + .section{padding-top:0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head h2{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:.01em}
.section-head .section-note{font-size:15px;color:var(--c-ink-2);max-width:560px;margin-top:8px}
.link-more{font-size:15px;font-weight:600;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.link-more::after{content:"→";font-family:var(--f-num)}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.94);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s ease-out;
}
.site-header.is-scrolled{box-shadow:var(--sh-1)}
.header-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;
  height:68px;display:flex;align-items:center;gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:600;color:var(--c-ink);white-space:nowrap}
.brand:hover{color:var(--c-primary-dark)}
.brand-mark{
  width:32px;height:32px;border-radius:8px;background:var(--c-primary);color:#fff;
  display:grid;place-items:center;font-size:12px;font-weight:700;letter-spacing:.02em;
  font-family:var(--f-num);
}
.nav{display:flex;align-items:center;gap:28px;margin-left:8px}
.nav a{
  position:relative;font-size:15px;font-weight:500;color:var(--c-ink-2);
  line-height:68px;padding:0 2px;
}
.nav a:hover{color:var(--c-primary)}
.nav a.active{color:var(--c-primary);font-weight:600}
.nav a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:var(--c-primary);border-radius:2px 2px 0 0;
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.search{position:relative}
.search svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--c-ink-3)}
.search input{
  width:220px;height:40px;border-radius:var(--r-pill);
  border:1px solid transparent;background:#F2F6FA;
  padding:0 16px 0 40px;font-size:14px;color:var(--c-ink);
  transition:border-color .18s ease-out,background .18s ease-out,box-shadow .18s ease-out;
}
.search input::placeholder{color:var(--c-ink-3)}
.search input:focus{
  outline:none;background:#fff;border-color:var(--c-primary);box-shadow:var(--sh-focus);
}
.search-hint{
  margin-top:8px;font-size:13px;color:var(--c-ink-3);display:none;
}
.search-hint.show{display:block}
.search-hint.error{color:var(--c-err)}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  transition:background .18s ease-out,color .18s ease-out,transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
  white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:#fff;border-color:var(--c-line);color:var(--c-ink)}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:var(--r-pill)}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{background:#C6D3E0;color:#fff;cursor:not-allowed;transform:none}
.btn:focus-visible{outline:none;box-shadow:var(--sh-focus)}

/* ===== Mobile drawer ===== */
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-md);
  align-items:center;justify-content:center;border:1px solid var(--c-line);background:#fff;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px;position:relative}
.menu-toggle span::before,.menu-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink);border-radius:2px;
}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82%;max-width:340px;z-index:120;
  background:#fff;transform:translateX(100%);transition:transform .24s ease-out;
  display:flex;flex-direction:column;padding:16px;overflow-y:auto;box-shadow:var(--sh-3);
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px}
.drawer-close{width:44px;height:44px;border-radius:var(--r-md);font-size:20px;color:var(--c-ink-2);display:grid;place-items:center}
.drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--c-line)}
.drawer-nav a{
  padding:16px 4px;font-size:16px;font-weight:500;color:var(--c-ink);
  border-bottom:1px solid var(--c-line);display:flex;align-items:center;justify-content:space-between;
}
.drawer-nav a.active{color:var(--c-primary);border-left:3px solid var(--c-primary);padding-left:12px;font-weight:600}
.drawer-nav a::after{content:"→";font-family:var(--f-num);color:var(--c-ink-3);font-size:14px}
.drawer-foot{margin-top:24px;display:flex;flex-direction:column;gap:12px}
.drawer .search input{width:100%}
.overlay{
  position:fixed;inset:0;background:rgba(14,33,56,.42);z-index:110;
  opacity:0;pointer-events:none;transition:opacity .24s ease-out;
}
.overlay.show{opacity:1;pointer-events:auto}

/* ===== Breadcrumb ===== */
.crumbs{
  font-size:13px;color:var(--c-ink-3);padding:20px 0 0;
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
}
.crumbs a{color:var(--c-ink-3)}
.crumbs a:hover{color:var(--c-primary)}
.crumbs .sep{color:#C4D2E0}
.crumbs .current{color:var(--c-ink-2);max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ===== Hero (white, editorial) ===== */
.page-hero{background:#fff;padding:40px 0 72px;border-bottom:1px solid var(--c-line)}
.hero-rule{border-left:4px solid var(--c-primary);padding-left:20px}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;
  border-radius:var(--r-pill);background:var(--c-primary-soft);color:var(--c-primary-dark);
  font-size:13px;font-weight:600;margin-bottom:20px;
}
.hero-rule h1{
  font-size:40px;line-height:1.25;font-weight:700;letter-spacing:.01em;color:var(--c-ink);
}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.8;color:var(--c-ink-2);max-width:720px}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:16px}
.hero-meta{
  margin-top:32px;display:flex;flex-wrap:wrap;gap:12px 28px;
  padding-top:24px;border-top:1px dashed var(--c-line);
}
.hero-meta div{display:flex;align-items:baseline;gap:8px;font-size:13px;color:var(--c-ink-3)}
.hero-meta strong{font-family:var(--f-num);font-variant-numeric:tabular-nums;font-size:15px;color:var(--c-ink);font-weight:700}
.hero-meta strong.accent{color:var(--c-primary)}

/* ===== Check panel (dark) ===== */
.check-panel{
  background:var(--c-footer);border-radius:var(--r-xl);padding:40px;color:#fff;
  background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:18px 18px;
}
.check-head{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;margin-bottom:32px}
.check-head h2{font-size:26px;line-height:1.35;font-weight:700}
.check-head p{margin-top:12px;font-size:15px;color:rgba(255,255,255,.7);max-width:640px;line-height:1.8}
.check-badge{
  flex:0 0 auto;height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.12);color:#fff;font-size:13px;font-weight:600;
  display:inline-flex;align-items:center;
}
.check-grid{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.check-grid li{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-md);padding:18px;display:flex;gap:12px;
}
.dot{flex:0 0 8px;width:8px;height:8px;border-radius:50%;margin-top:8px;background:var(--c-ok)}
.dot.warn{background:var(--c-accent)}
.check-label{display:block;font-size:14px;font-weight:600;color:#fff}
.check-val{font-family:var(--f-num);font-variant-numeric:tabular-nums;font-size:13px;color:rgba(255,255,255,.72);margin-top:6px;line-height:1.7}

/* ===== Steps timeline ===== */
.steps{list-style:none;max-width:880px}
.step{display:flex;gap:20px;padding:28px 0;border-bottom:1px dashed var(--c-line)}
.step:first-child{padding-top:0}
.step:last-child{border-bottom:0;padding-bottom:0}
.step-num{
  flex:0 0 40px;width:40px;height:40px;border-radius:10px;
  background:var(--c-primary-soft);color:var(--c-primary);
  display:grid;place-items:center;font-family:var(--f-num);font-size:16px;font-weight:700;
}
.step-body h3{font-size:22px;line-height:1.4;font-weight:600}
.step-body p{margin-top:8px;font-size:16px;color:var(--c-ink-2)}
.step-tags{margin-top:12px;display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--c-primary-soft);color:var(--c-primary-dark);font-size:12px;font-weight:600;
}
.tag.accent{background:#FDF3E3;color:#9A6516}

/* ===== Help cards ===== */
.help-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:stretch}
.help-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-2);padding:24px;display:flex;flex-direction:column;gap:16px;
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.help-card:hover{transform:translateY(-2px);box-shadow:var(--sh-3);border-color:#CFE0F6}
.help-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:12px}
.help-card h3{font-size:22px;line-height:1.4;font-weight:600}
.help-card p{font-size:15px;color:var(--c-ink-2)}
.help-list{list-style:none;display:flex;flex-direction:column;gap:12px;margin-top:4px}
.help-list li{display:flex;gap:10px;font-size:15px;color:var(--c-ink-2)}
.help-list li::before{
  content:"";flex:0 0 6px;width:6px;height:6px;border-radius:50%;
  background:var(--c-primary);margin-top:10px;
}
.help-card .link-more{margin-top:auto}

/* ===== Quick download strip ===== */
.dl-strip{
  background:var(--c-primary-soft);border-radius:var(--r-xl);padding:32px;
  background-image:radial-gradient(rgba(31,107,214,.09) 1px,transparent 1px);
  background-size:18px 18px;
}
.dl-strip-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:24px;flex-wrap:wrap}
.dl-strip-head h2{font-size:26px;line-height:1.35;font-weight:700}
.dl-strip-head p{font-size:14px;color:var(--c-ink-2);margin-top:8px}
.dl-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.dl-btn{
  display:flex;align-items:center;gap:12px;min-height:54px;padding:10px 16px;
  background:var(--c-primary);color:#fff;border-radius:var(--r-md);
  transition:background .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
}
.dl-btn:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2)}
.dl-btn:active{transform:translateY(1px)}
.dl-btn .dl-ico{
  flex:0 0 22px;width:22px;height:22px;border-radius:6px;background:rgba(255,255,255,.22);
  display:grid;place-items:center;font-family:var(--f-num);font-size:11px;font-weight:700;
}
.dl-btn .dl-text{display:flex;flex-direction:column;line-height:1.35}
.dl-btn .dl-name{font-size:15px;font-weight:600}
.dl-btn .dl-meta{font-family:var(--f-num);font-variant-numeric:tabular-nums;font-size:12px;color:rgba(255,255,255,.8)}
.dl-foot{margin-top:20px;font-size:13px;color:var(--c-ink-3);display:flex;flex-wrap:wrap;gap:8px 20px}

/* ===== FAQ ===== */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item.open{border-color:var(--c-primary);box-shadow:var(--sh-2)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;text-align:left;font-size:17px;font-weight:600;color:var(--c-ink);
  line-height:1.5;
}
.faq-q:hover{color:var(--c-primary-dark)}
.faq-icon{position:relative;flex:0 0 20px;width:20px;height:20px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--c-primary);border-radius:2px;
  transition:transform .2s ease-out,opacity .2s ease-out;
}
.faq-icon::before{left:2px;right:2px;top:9px;height:2px}
.faq-icon::after{top:2px;bottom:2px;left:9px;width:2px}
.faq-item.open .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height .2s ease-out,opacity .2s ease-out}
.faq-item.open .faq-a{max-height:400px;opacity:1}
.faq-a p{padding:0 24px 22px;font-size:15px;line-height:1.8;color:var(--c-ink-2)}

/* ===== CTA bar ===== */
.cta-bar{
  background:var(--c-primary-soft);border-radius:var(--r-xl);
  padding:32px 40px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
.cta-bar h2{font-size:24px;line-height:1.4;font-weight:700}
.cta-bar p{margin-top:8px;font-size:15px;color:var(--c-ink-2)}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ===== Mobile download bar ===== */
.mobile-download-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:90;
  height:56px;padding:0 16px;background:rgba(255,255,255,.97);
  border-top:1px solid var(--c-line);align-items:center;justify-content:space-between;gap:12px;
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
}
.mobile-download-bar .mdb-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.mobile-download-bar .mdb-text strong{font-size:14px;font-weight:600;color:var(--c-ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mobile-download-bar .mdb-text span{font-family:var(--f-num);font-size:12px;color:var(--c-ink-3)}

/* ===== Footer ===== */
.site-footer{background:var(--c-footer);color:rgba(255,255,255,.72);padding:64px 0 32px;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand .brand{color:#fff;font-size:16px}
.footer-brand .brand:hover{color:#fff}
.footer-brand .brand-mark{background:var(--c-primary)}
.footer-about{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:320px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.01em}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.7);padding:6px 0;line-height:1.6}
.footer-col a:hover{color:#fff;text-decoration:underline}
.footer-qr{
  width:120px;height:120px;border-radius:12px;border:1px solid rgba(255,255,255,.18);
  display:grid;place-items:center;text-align:center;font-size:12px;line-height:1.6;
  color:rgba(255,255,255,.6);background:rgba(255,255,255,.04);
}
.footer-contact{margin-top:16px;font-size:13px;line-height:1.9;color:rgba(255,255,255,.6)}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ===== Responsive ===== */
@media (max-width:1279px){
  .check-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .section + .section{padding-top:0}
  .nav{display:none}
  .search{display:none}
  .header-actions .btn{display:none}
  .menu-toggle{display:flex}
  .header-actions{gap:8px}
  .hero-rule h1{font-size:34px}
  .help-grid{grid-template-columns:1fr}
  .dl-row{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .check-panel{padding:32px}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .section + .section{padding-top:0}
  .container{padding:0 16px}
  .header-inner{padding:0 16px;height:64px}
  .nav a{line-height:64px}
  .page-hero{padding:24px 0 56px}
  .hero-rule h1{font-size:30px}
  .hero-sub{font-size:16px}
  .hero-actions{gap:12px}
  .hero-actions .btn{width:100%}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px}
  .section-head h2{font-size:24px}
  .check-panel{padding:24px;border-radius:var(--r-lg)}
  .check-head{flex-direction:column;gap:12px}
  .check-head h2{font-size:22px}
  .check-grid{grid-template-columns:1fr}
  .step{gap:16px;padding:24px 0}
  .step-body h3{font-size:19px}
  .dl-strip{padding:24px;border-radius:var(--r-lg)}
  .dl-row{grid-template-columns:1fr}
  .dl-btn{min-height:56px}
  .cta-bar{padding:24px;border-radius:var(--r-lg);flex-direction:column;align-items:stretch;text-align:center}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
  .faq-q{padding:18px;font-size:16px}
  .faq-a p{padding:0 18px 20px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
  .mobile-download-bar{display:flex}
  body{padding-bottom:56px}
  .site-footer{margin-top:56px;padding-bottom:32px}
}
@media (max-width:519px){
  .hero-rule h1{font-size:28px}
  .hero-meta{gap:10px 20px}
  .check-panel{padding:20px}
  .help-card{padding:16px}
  .footer-grid{grid-template-columns:1fr}
  .footer-qr{width:100px;height:100px}
}