/* roulang page: index */
:root{
  --c-primary:#1E5AE8;
  --c-primary-deep:#12315F;
  --c-accent:#FF7A2F;
  --c-accent-soft:#FFF2E8;
  --c-bg:#F5F8FD;
  --c-surface:#FFFFFF;
  --c-line:#E3EAF5;
  --c-text:#17233A;
  --c-text-sub:#5A6B85;
  --c-ok:#1FA97A;
  --r-card:16px;
  --r-btn:12px;
  --r-chip:999px;
  --r-hero:20px;
  --sh-card:0 1px 2px rgba(23,56,120,.04), 0 8px 24px rgba(23,56,120,.06);
  --sh-hover:0 4px 12px rgba(23,56,120,.08), 0 18px 40px rgba(23,56,120,.10);
  --sh-nav:0 1px 0 rgba(23,56,120,.06);
  --container:1200px;
  --ease:240ms cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
.site-body{
  margin:0;
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
.site-body img{display:block;max-width:100%;border-radius:12px;background:#E7EEFA;}
.site-body a{color:inherit;text-decoration:none;}
.site-body button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
.site-body input{font-family:inherit;}
.site-body ul,.site-body ol{margin:0;padding:0;list-style:none;}
.site-body h1,.site-body h2,.site-body h3,.site-body h4,.site-body p{margin:0;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
@media (min-width:768px){.container{padding:0 24px;}}
@media (min-width:1024px){.container{padding:0 32px;}}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;background:#fff;
  border-bottom:1px solid var(--c-line);transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(23,56,120,.08);}
.nav-wrap{display:flex;align-items:center;gap:20px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--c-primary),#4B86FF);
  display:grid;place-items:center;color:#fff;flex-shrink:0;
  box-shadow:0 6px 14px rgba(30,90,232,.28);
}
.brand-text{font-size:18px;font-weight:700;letter-spacing:-.3px;color:var(--c-text);white-space:nowrap;}
.brand-text em{font-style:normal;color:var(--c-primary);}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:6px;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:68px;padding:0 14px;
  font-size:15px;color:var(--c-text-sub);transition:color var(--ease);
}
.nav-link:hover{color:var(--c-primary);}
.nav-link.active{color:var(--c-primary);font-weight:600;}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;
  border-radius:2px;background:var(--c-primary);
}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.nav-search{
  display:flex;align-items:center;gap:8px;height:44px;padding:0 16px;
  border-radius:var(--r-chip);background:#F2F5FB;border:1px solid transparent;
  transition:border-color var(--ease),background var(--ease),box-shadow var(--ease);
}
.nav-search:focus-within{background:#fff;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(30,90,232,.12);}
.nav-search input{
  border:0;outline:0;background:transparent;width:150px;font-size:14px;color:var(--c-text);
}
.nav-search input::placeholder{color:var(--c-text-sub);}
.nav-search svg{color:var(--c-text-sub);flex-shrink:0;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);
  background:#fff;place-items:center;color:var(--c-text);
}
.nav-toggle:hover{background:#F2F5FB;}
.mobile-drawer{display:none;border-top:1px solid var(--c-line);background:#fff;padding:12px 0 18px;}
.mobile-drawer.open{display:block;}
.mobile-drawer a{
  display:flex;align-items:center;justify-content:space-between;
  padding:13px 4px;font-size:15px;color:var(--c-text-sub);border-bottom:1px solid var(--c-line);
}
.mobile-drawer a:last-of-type{border-bottom:0;}
.mobile-drawer a.active{color:var(--c-primary);font-weight:600;}
.mobile-drawer .drawer-cta{
  margin-top:14px;display:flex;justify-content:center;height:46px;border-radius:var(--r-btn);
  background:var(--c-primary);color:#fff;font-weight:600;font-size:15px;
}
@media (max-width:1023px){
  .nav-links,.nav-search{display:none;}
  .nav-toggle{display:grid;}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),filter var(--ease),background var(--ease),color var(--ease);
}
.btn svg{flex-shrink:0;}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 8px 20px rgba(30,90,232,.24);}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 12px 26px rgba(30,90,232,.3);}
.btn-primary:active{transform:translateY(0);filter:brightness(.97);box-shadow:0 6px 14px rgba(30,90,232,.22);}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 8px 20px rgba(255,122,47,.26);}
.btn-accent:hover{filter:brightness(1.05);transform:translateY(-1px);box-shadow:0 12px 26px rgba(255,122,47,.32);}
.btn-accent:active{transform:translateY(0);filter:brightness(.97);}
.btn-ghost{background:#fff;color:var(--c-primary);border:1px solid rgba(30,90,232,.38);}
.btn-ghost:hover{background:#F1F6FF;transform:translateY(-1px);box-shadow:0 8px 18px rgba(30,90,232,.12);}
.btn-ghost:active{transform:translateY(0);background:#E8F0FF;}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:10px;}
.btn:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.btn-block{width:100%;}

/* ---------- 通用区块 ---------- */
.section{padding:52px 0;}
@media (min-width:1024px){.section{padding:80px 0;}}
.section-white{background:#fff;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px;flex-wrap:wrap;}
.section-head h2{font-size:24px;line-height:1.4;font-weight:700;letter-spacing:-.4px;}
@media (min-width:1024px){.section-head h2{font-size:28px;}}
.section-head p{margin-top:8px;font-size:14px;color:var(--c-text-sub);}
.section-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary);
  padding:8px 14px;border-radius:var(--r-chip);transition:background var(--ease),gap var(--ease);
}
.section-link:hover{background:#F1F6FF;gap:10px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--c-primary);background:var(--c-accent-soft);border-radius:var(--r-chip);
  padding:6px 14px;margin-bottom:16px;
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--c-accent);display:inline-block;}

/* ---------- Hero ---------- */
.hero{position:relative;background:#fff;overflow:hidden;padding:44px 0 56px;}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(560px 320px at 78% 6%, rgba(30,90,232,.10), transparent 70%),
    radial-gradient(440px 280px at 4% 92%, rgba(255,122,47,.07), transparent 70%),
    radial-gradient(rgba(23,49,95,.06) 1px, transparent 1px);
  background-size:auto,auto,22px 22px;
}
@media (min-width:1024px){.hero{padding:64px 0 76px;}}
.hero-grid{position:relative;display:grid;gap:40px;grid-template-columns:1fr;align-items:center;}
@media (min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:56px;}}
.hero h1{font-size:30px;line-height:1.35;font-weight:800;letter-spacing:-.6px;}
@media (min-width:768px){.hero h1{font-size:38px;}}
@media (min-width:1024px){.hero h1{font-size:42px;}}
.hero h1 span{color:var(--c-primary);}
.hero-sub{margin-top:18px;font-size:16px;color:var(--c-text-sub);max-width:560px;}
.hero-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px;}
.hero-badges{margin-top:26px;display:flex;flex-wrap:wrap;gap:10px;}
.badge{
  display:inline-flex;align-items:center;gap:7px;padding:7px 14px;border-radius:var(--r-chip);
  font-size:13px;color:var(--c-text-sub);background:#fff;border:1px solid var(--c-line);
}
.badge svg{color:var(--c-ok);flex-shrink:0;}
.hero-device{
  position:relative;border-radius:var(--r-hero);overflow:hidden;
  box-shadow:var(--sh-hover);background:var(--c-primary-deep);
}
.hero-device img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:0;}
.hero-device::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(18,49,95,0) 45%,rgba(18,49,95,.55) 100%);
}
.hero-float{
  position:absolute;left:16px;bottom:16px;z-index:2;background:#fff;border-radius:14px;
  padding:12px 16px;box-shadow:0 14px 32px rgba(9,26,60,.24);display:flex;align-items:center;gap:12px;
}
.hero-float strong{display:block;font-size:16px;font-weight:700;line-height:1.3;}
.hero-float small{font-size:12px;color:var(--c-text-sub);}
.hero-stars{display:flex;gap:2px;color:var(--c-accent);}

/* ---------- 截图轮播 ---------- */
.shot-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:24px;flex-wrap:wrap;}
.shot-head h2{font-size:22px;font-weight:700;letter-spacing:-.3px;}
@media (min-width:1024px){.shot-head h2{font-size:26px;}}
.shot-nav{display:flex;gap:10px;}
.shot-nav button{
  width:42px;height:42px;border-radius:var(--r-chip);background:#fff;border:1px solid var(--c-line);
  display:grid;place-items:center;color:var(--c-primary);box-shadow:var(--sh-card);
  transition:background var(--ease),transform var(--ease),box-shadow var(--ease);
}
.shot-nav button:hover{background:#F1F6FF;transform:translateY(-1px);box-shadow:var(--sh-hover);}
.shot-nav button:active{transform:translateY(0);}
.shot-nav button:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.shot-track{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 4px 18px;scrollbar-width:none;
}
.shot-track::-webkit-scrollbar{display:none;}
.shot-card{
  flex:0 0 300px;scroll-snap-align:start;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-card);overflow:hidden;
  transition:box-shadow var(--ease),transform var(--ease);
}
@media (min-width:768px){.shot-card{flex:0 0 330px;}}
.shot-card:hover{box-shadow:var(--sh-hover);transform:translateY(-4px);}
.shot-thumb{aspect-ratio:1/0.62;overflow:hidden;background:#E7EEFA;}
.shot-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform var(--ease);}
.shot-card:hover .shot-thumb img{transform:scale(1.04);}
.shot-body{padding:16px 18px 20px;}
.shot-body h3{font-size:16px;font-weight:600;margin-bottom:6px;}
.shot-body p{font-size:13px;color:var(--c-text-sub);}
@media (max-width:767px){.shot-nav{display:none;}}

/* ---------- 能力说明 ---------- */
.feature-row{display:grid;gap:28px;align-items:center;grid-template-columns:1fr;}
.feature-row + .feature-row{margin-top:56px;}
@media (min-width:1024px){
  .feature-row{grid-template-columns:1fr 1fr;gap:64px;}
  .feature-row.reverse .feature-media{order:-1;}
  .feature-row + .feature-row{margin-top:72px;}
}
.feature-media{border-radius:var(--r-hero);overflow:hidden;box-shadow:var(--sh-card);border:1px solid var(--c-line);background:#fff;}
.feature-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:0;}
.feature-copy h2{font-size:24px;font-weight:700;letter-spacing:-.4px;margin-bottom:14px;}
@media (min-width:1024px){.feature-copy h2{font-size:28px;}}
.feature-copy > p{color:var(--c-text-sub);font-size:15px;}
.feature-list{margin-top:22px;display:grid;gap:14px;}
.feature-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;}
.feature-list .tick{
  flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--c-accent-soft);
  color:var(--c-accent);display:grid;place-items:center;margin-top:3px;
}
.feature-list b{font-weight:600;}
.feature-list span{color:var(--c-text-sub);font-size:14px;display:block;}

/* ---------- 系统要求 ---------- */
.spec-wrap{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);overflow:hidden;
}
.spec-table{width:100%;border-collapse:collapse;font-size:15px;}
.spec-table thead th{
  background:#F0F5FF;color:var(--c-primary-deep);font-weight:600;text-align:left;
  padding:16px 20px;font-size:14px;
}
.spec-table tbody td{padding:0 20px;height:52px;border-top:1px solid var(--c-line);color:var(--c-text-sub);vertical-align:middle;}
.spec-table tbody tr:nth-child(odd){background:#fff;}
.spec-table tbody tr:nth-child(even){background:#FAFCFF;}
.spec-table tbody td:first-child{color:var(--c-text);font-weight:600;width:24%;}
.spec-table tbody tr{transition:background var(--ease);}
.spec-table tbody tr:hover{background:#F1F6FF;}
.spec-note{margin-top:16px;font-size:13px;color:var(--c-text-sub);}

/* ---------- 评价墙 ---------- */
.review-grid{display:grid;gap:24px;grid-template-columns:1fr;}
@media (min-width:768px){.review-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.review-grid{grid-template-columns:repeat(3,1fr);align-items:start;}}
.review-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);padding:24px;transition:box-shadow var(--ease),transform var(--ease);
}
.review-card:hover{box-shadow:var(--sh-hover);transform:translateY(-4px);}
@media (min-width:1024px){.review-card.wide{padding-bottom:40px;}.review-card.offset{margin-top:28px;}}
.review-top{display:flex;align-items:center;gap:12px;}
.avatar{
  width:44px;height:44px;border-radius:50%;background:#E7EEFA;color:var(--c-primary);
  display:grid;place-items:center;font-weight:700;font-size:15px;flex-shrink:0;
}
.review-top strong{display:block;font-size:15px;font-weight:600;}
.review-top small{font-size:12px;color:var(--c-text-sub);}
.review-stars{margin:14px 0 10px;color:var(--c-accent);display:flex;gap:2px;}
.review-card p{font-size:14px;color:var(--c-text-sub);}
.tag-row{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  font-size:12px;padding:4px 11px;border-radius:var(--r-chip);
  background:var(--c-accent-soft);color:#C2571B;
}
.tag-blue{background:#EDF3FF;color:var(--c-primary);}

/* ---------- 下载面板 ---------- */
.download-panel{
  background:var(--c-primary-deep);border-radius:20px;padding:34px 24px;color:#fff;
  box-shadow:0 24px 60px rgba(11,32,68,.28);
}
@media (min-width:1024px){.download-panel{padding:48px;}}
.download-panel .panel-head{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;justify-content:space-between;margin-bottom:28px;}
.download-panel h2{font-size:24px;font-weight:700;letter-spacing:-.4px;}
@media (min-width:1024px){.download-panel h2{font-size:28px;}}
.download-panel .panel-head p{font-size:14px;color:#A9BDE0;margin-top:8px;max-width:620px;}
.dl-grid{display:grid;gap:18px;grid-template-columns:1fr;}
@media (min-width:640px){.dl-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.dl-grid{grid-template-columns:repeat(4,1fr);}}
.dl-item{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:16px;
  padding:20px;display:flex;flex-direction:column;gap:14px;
  transition:background var(--ease),border-color var(--ease),transform var(--ease);
}
.dl-item:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.3);transform:translateY(-3px);}
.dl-icon{
  width:44px;height:44px;border-radius:12px;background:rgba(255,255,255,.14);
  display:grid;place-items:center;
}
.dl-item h3{font-size:16px;font-weight:600;}
.dl-item .meta{font-size:12px;color:#A9BDE0;margin-top:4px;}
.dl-item .btn{margin-top:auto;}
.qr-box{
  width:96px;height:96px;border-radius:12px;background:rgba(255,255,255,.14);
  display:grid;place-items:center;color:#fff;margin-top:auto;
}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;gap:24px;grid-template-columns:1fr;}
@media (min-width:640px){.news-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.news-grid{grid-template-columns:repeat(4,1fr);}}
.news-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-card);overflow:hidden;
  transition:box-shadow var(--ease),transform var(--ease);
}
.news-card:hover{box-shadow:var(--sh-hover);transform:translateY(-4px);}
.news-thumb{aspect-ratio:16/9;overflow:hidden;background:#E7EEFA;position:relative;}
.news-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform var(--ease);}
.news-card:hover .news-thumb img{transform:scale(1.05);}
.news-badge{
  position:absolute;left:12px;top:12px;font-size:12px;padding:4px 11px;border-radius:var(--r-chip);
  background:rgba(255,255,255,.94);color:var(--c-primary);font-weight:600;
}
.news-body{padding:16px 18px 18px;display:flex;flex-direction:column;flex:1;}
.news-body h3{font-size:16px;font-weight:600;line-height:1.5;}
.news-body .news-sum{margin-top:10px;font-size:13px;color:var(--c-text-sub);}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.clamp-1{display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;}
.news-foot{
  margin-top:16px;padding-top:14px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:12px;color:var(--c-text-sub);
}
.news-foot .more{color:var(--c-primary);font-weight:600;display:inline-flex;align-items:center;gap:4px;}
.news-card:hover .news-foot .more{gap:8px;}
.empty-state{
  grid-column:1/-1;border:1px dashed #C6D5EE;background:#FAFCFF;border-radius:var(--r-card);
  padding:44px 20px;text-align:center;color:var(--c-text-sub);font-size:15px;
}
.empty-state strong{display:block;color:var(--c-text);font-size:16px;margin-bottom:6px;font-weight:600;}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px;margin:0 auto;}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);margin-bottom:12px;overflow:hidden;
  transition:box-shadow var(--ease),border-color var(--ease);
}
.faq-item:hover{box-shadow:var(--sh-hover);}
.faq-item.open{border-color:rgba(30,90,232,.35);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 22px;font-size:16px;font-weight:600;text-align:left;color:var(--c-text);
}
.faq-q:focus-visible{outline:2px solid var(--c-primary);outline-offset:-2px;}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;background:#EDF3FF;color:var(--c-primary);
  display:grid;place-items:center;font-size:17px;line-height:1;transition:transform var(--ease),background var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--c-primary);color:#fff;}
.faq-a{
  max-height:0;overflow:hidden;background:#F8FAFF;
  transition:max-height var(--ease),padding var(--ease);
  padding:0 22px;font-size:14px;color:var(--c-text-sub);
}
.faq-item.open .faq-a{max-height:420px;padding:16px 22px 20px;}

/* ---------- 底部 CTA ---------- */
.cta-strip{
  background:#fff;border:1px solid var(--c-line);border-radius:20px;box-shadow:var(--sh-card);
  padding:32px 24px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
}
@media (min-width:1024px){.cta-strip{padding:40px;}}
.cta-strip h2{font-size:22px;font-weight:700;letter-spacing:-.3px;}
@media (min-width:1024px){.cta-strip h2{font-size:26px;}}
.cta-strip p{margin-top:8px;font-size:14px;color:var(--c-text-sub);max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-primary-deep);color:#fff;margin-top:24px;padding-top:56px;}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr;}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;letter-spacing:-.3px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.16);box-shadow:none;}
.footer-about{margin-top:16px;font-size:14px;color:#A9BDE0;max-width:340px;}
.footer-col h3{font-size:15px;font-weight:600;margin-bottom:16px;color:#fff;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:#A9BDE0;transition:color var(--ease),padding-left var(--ease);}
.footer-col a:hover{color:#fff;padding-left:4px;}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.14);padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;
  font-size:13px;color:#A9BDE0;
}
.footer-bottom a{color:#A9BDE0;}
.footer-bottom a:hover{color:#fff;}
@media (max-width:479px){
  .hero h1{font-size:26px;}
  .section{padding:44px 0;}
  .section-head h2{font-size:21px;}
  .download-panel{padding:26px 18px;}
}

/* roulang page: article */
:root{
    --c-primary:#1E5AE8;
    --c-primary-deep:#12315F;
    --c-accent:#FF7A2F;
    --c-accent-soft:#FFF2E8;
    --c-bg:#F5F8FD;
    --c-surface:#FFFFFF;
    --c-line:#E3EAF5;
    --c-text:#17233A;
    --c-text-sub:#5A6B85;
    --c-ok:#1FA97A;
    --r-card:16px;
    --r-btn:12px;
    --r-chip:999px;
    --r-hero:20px;
    --sh-card:0 1px 2px rgba(23,56,120,.04),0 8px 24px rgba(23,56,120,.06);
    --sh-hover:0 4px 12px rgba(23,56,120,.08),0 18px 40px rgba(23,56,120,.10);
    --sh-nav:0 1px 0 rgba(23,56,120,.06);
    --container:1200px;
    --ease:240ms cubic-bezier(.4,0,.2,1);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--c-bg);
    color:var(--c-text);
    font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border-radius:12px;background:#E9EFF9}
  a{color:inherit;text-decoration:none;transition:color var(--ease),background var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease)}
  a:focus-visible,button:focus-visible,input:focus-visible{
    outline:2px solid var(--c-primary);
    outline-offset:2px;
    border-radius:8px;
  }
  button{font-family:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;color:var(--c-text);letter-spacing:-0.3px}
  p{margin:0}
  ::selection{background:var(--c-primary);color:#fff}
  ::-webkit-scrollbar{width:10px;height:10px}
  ::-webkit-scrollbar-track{background:#EDF2FA}
  ::-webkit-scrollbar-thumb{background:#C4D3EC;border-radius:999px;border:2px solid #EDF2FA}
  ::-webkit-scrollbar-thumb:hover{background:#A9BEE0}

  .container{
    width:100%;
    max-width:var(--container);
    margin:0 auto;
    padding:0 20px;
  }

  /* ---------- header ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(255,255,255,.96);
    backdrop-filter:blur(8px);
    border-bottom:1px solid var(--c-line);
    box-shadow:var(--sh-nav);
    transition:box-shadow var(--ease);
  }
  .site-header.is-scrolled{box-shadow:0 6px 22px rgba(23,56,120,.08)}
  .header-inner{
    display:flex;
    align-items:center;
    gap:24px;
    height:68px;
  }
  .brand{
    display:inline-flex;
    align-items:center;
    gap:10px;
    font-size:19px;
    font-weight:700;
    color:var(--c-text);
    letter-spacing:-0.4px;
    white-space:nowrap;
  }
  .brand-mark{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:34px;
    height:34px;
    border-radius:11px;
    background:linear-gradient(135deg,var(--c-primary) 0%,#4B85FF 100%);
    color:#fff;
    flex:0 0 auto;
  }
  .brand:hover .brand-mark{transform:translateY(-1px);box-shadow:0 6px 16px rgba(30,90,232,.32)}
  .brand-mark{transition:transform var(--ease),box-shadow var(--ease)}

  .nav-links{
    display:flex;
    align-items:center;
    gap:4px;
    margin-left:6px;
  }
  .nav-link{
    position:relative;
    display:inline-block;
    padding:9px 14px;
    font-size:15px;
    color:var(--c-text-sub);
    border-radius:var(--r-chip);
    font-weight:500;
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:50%;
    bottom:2px;
    width:0;
    height:2px;
    border-radius:2px;
    background:var(--c-primary);
    transform:translateX(-50%);
    transition:width var(--ease);
  }
  .nav-link:hover{color:var(--c-primary);background:#F2F6FE}
  .nav-link:hover::after{width:22px}
  .nav-link.active{color:var(--c-primary);font-weight:700}
  .nav-link.active::after{width:22px}

  .header-right{
    margin-left:auto;
    display:flex;
    align-items:center;
    gap:12px;
  }
  .search-box{
    display:flex;
    align-items:center;
    gap:8px;
    height:44px;
    padding:0 16px;
    border-radius:var(--r-chip);
    background:#F2F6FE;
    border:1px solid transparent;
    transition:border-color var(--ease),background var(--ease),box-shadow var(--ease);
  }
  .search-box:focus-within{
    background:#fff;
    border-color:var(--c-primary);
    box-shadow:0 0 0 4px rgba(30,90,232,.12);
  }
  .search-box svg{flex:0 0 auto;color:var(--c-text-sub)}
  .search-box input{
    border:0;
    background:transparent;
    outline:none;
    width:150px;
    font-size:14px;
    color:var(--c-text);
  }
  .search-box input::placeholder{color:var(--c-text-sub)}
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    height:44px;
    padding:0 20px;
    border:1px solid transparent;
    border-radius:var(--r-btn);
    font-size:15px;
    font-weight:600;
    cursor:pointer;
    white-space:nowrap;
    transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease),filter var(--ease);
  }
  .btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 6px 16px rgba(30,90,232,.24)}
  .btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 10px 24px rgba(30,90,232,.30)}
  .btn-primary:active{transform:none;box-shadow:0 4px 10px rgba(30,90,232,.22)}
  .btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 6px 16px rgba(255,122,47,.26)}
  .btn-accent:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 10px 24px rgba(255,122,47,.32)}
  .btn-accent:active{transform:none}
  .btn-ghost{background:#fff;color:var(--c-primary);border-color:#C9DAF7}
  .btn-ghost:hover{background:#F2F6FE;border-color:var(--c-primary);transform:translateY(-1px)}
  .btn-ghost:active{transform:none}
  .btn:disabled,.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}
  .btn-sm{height:36px;padding:0 14px;font-size:14px;border-radius:10px}

  .nav-toggle{
    display:none;
    width:44px;
    height:44px;
    align-items:center;
    justify-content:center;
    border:1px solid var(--c-line);
    border-radius:var(--r-btn);
    background:#fff;
    color:var(--c-text);
    cursor:pointer;
  }
  .nav-toggle:hover{background:#F2F6FE;border-color:#C9DAF7}

  .nav-drawer{
    display:none;
    border-top:1px solid var(--c-line);
    background:#fff;
    padding:14px 20px 20px;
  }
  .nav-drawer.open{display:block}
  .nav-drawer .nav-link{
    display:block;
    padding:12px 14px;
    border-radius:10px;
    font-size:15px;
  }
  .nav-drawer .nav-link::after{display:none}
  .nav-drawer .nav-link.active{background:#F2F6FE}
  .nav-drawer .drawer-search{margin-top:10px}
  .nav-drawer .drawer-search input{width:100%}

  /* ---------- page banner / breadcrumb ---------- */
  .page-head{
    position:relative;
    overflow:hidden;
    background:var(--c-surface);
    border-bottom:1px solid var(--c-line);
  }
  .page-head::before{
    content:"";
    position:absolute;
    inset:0;
    background-image:radial-gradient(circle at 12% 0%,rgba(30,90,232,.10),transparent 46%),
                     radial-gradient(circle at 88% 12%,rgba(255,122,47,.08),transparent 44%),
                     radial-gradient(rgba(23,56,120,.16) 1px,transparent 1px);
    background-size:auto,auto,18px 18px;
    opacity:.55;
    pointer-events:none;
  }
  .page-head-inner{position:relative;padding:34px 0 38px}
  .breadcrumb{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px;
    font-size:13.5px;
    color:var(--c-text-sub);
    margin-bottom:16px;
  }
  .breadcrumb a:hover{color:var(--c-primary)}
  .breadcrumb .sep{color:#B7C6DE}
  .breadcrumb .current{color:var(--c-text);font-weight:600;max-width:min(560px,72vw);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .cat-chip{
    display:inline-flex;
    align-items:center;
    gap:6px;
    height:28px;
    padding:0 12px;
    border-radius:var(--r-chip);
    background:var(--c-accent-soft);
    color:#C4551A;
    font-size:13px;
    font-weight:600;
    margin-bottom:14px;
  }
  .page-title{
    font-size:34px;
    line-height:1.4;
    max-width:900px;
    letter-spacing:-0.6px;
  }
  .page-meta{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:10px 18px;
    margin-top:16px;
    font-size:13.5px;
    color:var(--c-text-sub);
  }
  .page-meta .dot{width:4px;height:4px;border-radius:50%;background:#C7D5EB}
  .page-meta strong{color:var(--c-text);font-weight:600}

  /* ---------- article layout ---------- */
  .main-wrap{padding:48px 0 8px}
  .article-shell{
    display:grid;
    grid-template-columns:minmax(0,1fr) 320px;
    gap:32px;
    align-items:start;
  }
  .article-card{
    background:var(--c-surface);
    border:1px solid var(--c-line);
    border-radius:var(--r-card);
    box-shadow:var(--sh-card);
    padding:38px 40px 44px;
  }
  .article-body{
    max-width:760px;
    margin:0 auto;
    font-size:16px;
    line-height:1.9;
    color:#22314E;
  }
  .article-body > * + *{margin-top:18px}
  .article-body h2{
    position:relative;
    font-size:23px;
    margin-top:40px;
    padding-left:14px;
    line-height:1.5;
  }
  .article-body h2::before{
    content:"";
    position:absolute;
    left:0;
    top:6px;
    bottom:6px;
    width:4px;
    border-radius:4px;
    background:var(--c-primary);
  }
  .article-body h3{
    font-size:18.5px;
    margin-top:28px;
    color:var(--c-text);
  }
  .article-body p{color:#33445F}
  .article-body a{color:var(--c-primary);font-weight:600;border-bottom:1px solid rgba(30,90,232,.32)}
  .article-body a:hover{color:#12315F;border-bottom-color:#12315F}
  .article-body strong{color:var(--c-text);font-weight:700}
  .article-body ul,.article-body ol{padding-left:0;display:grid;gap:10px}
  .article-body ul li,.article-body ol li{
    position:relative;
    padding:12px 16px 12px 42px;
    background:#F7FAFF;
    border:1px solid var(--c-line);
    border-radius:12px;
    transition:background var(--ease),border-color var(--ease),transform var(--ease);
  }
  .article-body ul li::before{
    content:"";
    position:absolute;
    left:18px;
    top:22px;
    width:8px;
    height:8px;
    border-radius:50%;
    background:var(--c-primary);
  }
  .article-body ol{counter-reset:item}
  .article-body ol li::before{
    counter-increment:item;
    content:counter(item);
    position:absolute;
    left:14px;
    top:14px;
    width:20px;
    height:20px;
    border-radius:6px;
    background:var(--c-accent-soft);
    color:#C4551A;
    font-size:12px;
    font-weight:700;
    display:flex;
    align-items:center;
    justify-content:center;
  }
  .article-body ul li:hover,.article-body ol li:hover{background:#EFF5FF;border-color:#CBDBF7;transform:translateX(2px)}
  .article-body img{border-radius:14px;margin:22px 0;border:1px solid var(--c-line)}
  .article-body blockquote{
    margin:24px 0;
    padding:18px 22px;
    background:var(--c-accent-soft);
    border-left:4px solid var(--c-accent);
    border-radius:0 12px 12px 0;
    color:#7A4419;
  }
  .article-body table{
    width:100%;
    border-collapse:separate;
    border-spacing:0;
    border:1px solid var(--c-line);
    border-radius:14px;
    overflow:hidden;
    font-size:15px;
    margin:22px 0;
  }
  .article-body thead th{
    background:#EEF4FF;
    color:var(--c-primary-deep);
    font-weight:700;
    text-align:left;
  }
  .article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--c-line)}
  .article-body tbody tr:nth-child(even){background:#FAFCFF}
  .article-body tbody tr:last-child td{border-bottom:0}
  .article-body tbody tr:hover{background:#EFF5FF}
  .article-body code{
    background:#F2F6FE;
    color:#12315F;
    padding:2px 7px;
    border-radius:6px;
    font-size:14px;
  }

  .article-foot{
    max-width:760px;
    margin:36px auto 0;
    padding-top:24px;
    border-top:1px dashed #D7E2F3;
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:14px;
  }
  .article-foot .tags{display:flex;flex-wrap:wrap;gap:8px}
  .tag{
    display:inline-flex;
    align-items:center;
    height:28px;
    padding:0 12px;
    border-radius:var(--r-chip);
    background:#F2F6FE;
    border:1px solid var(--c-line);
    color:var(--c-text-sub);
    font-size:13px;
  }
  .tag:hover{color:var(--c-primary);border-color:#C9DAF7;background:#fff}

  .empty-state{
    max-width:760px;
    margin:0 auto;
    padding:56px 24px;
    text-align:center;
    border:1px dashed #CBD9EE;
    border-radius:var(--r-card);
    background:#FAFCFF;
  }
  .empty-state h2{font-size:19px;margin-bottom:10px}
  .empty-state p{color:var(--c-text-sub);font-size:14.5px;margin-bottom:18px}

  /* ---------- sidebar ---------- */
  .side-card{
    background:var(--c-surface);
    border:1px solid var(--c-line);
    border-radius:var(--r-card);
    box-shadow:var(--sh-card);
    padding:22px;
  }
  .side-card + .side-card{margin-top:20px}
  .side-title{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:16px;
    margin-bottom:14px;
  }
  .side-title::before{
    content:"";
    width:4px;
    height:16px;
    border-radius:4px;
    background:var(--c-primary);
  }
  .side-list{display:grid;gap:8px}
  .side-list a{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    padding:11px 14px;
    border-radius:10px;
    font-size:14.5px;
    color:var(--c-text-sub);
    border:1px solid transparent;
  }
  .side-list a span.arrow{color:#B7C6DE;transition:transform var(--ease),color var(--ease)}
  .side-list a:hover{background:#F2F6FE;color:var(--c-primary);border-color:#DCE7FA}
  .side-list a:hover span.arrow{color:var(--c-primary);transform:translateX(3px)}
  .side-dl{
    background:linear-gradient(160deg,#12315F 0%,#1B4380 100%);
    border:0;
    color:#fff;
  }
  .side-dl h3{color:#fff;font-size:16px}
  .side-dl p{color:#B9CCEA;font-size:13.5px;margin-top:8px}
  .side-dl .btn{width:100%;margin-top:16px}
  .side-version{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    margin-top:14px;
  }
  .side-version span{
    font-size:12.5px;
    color:#CBDCF6;
    background:rgba(255,255,255,.10);
    border-radius:var(--r-chip);
    padding:4px 10px;
  }

  /* ---------- sections ---------- */
  .section{padding:64px 0}
  .section-sm{padding:44px 0 8px}
  .section-head{
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    gap:16px;
    margin-bottom:26px;
  }
  .section-head h2{font-size:24px}
  .section-head .more{
    font-size:14px;
    color:var(--c-primary);
    font-weight:600;
    display:inline-flex;
    align-items:center;
    gap:6px;
  }
  .section-head .more:hover{gap:10px;color:#12315F}
  .section-desc{color:var(--c-text-sub);font-size:14.5px;margin-top:8px}

  .grid-3{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:24px;
  }
  .post-card{
    display:flex;
    flex-direction:column;
    background:var(--c-surface);
    border:1px solid var(--c-line);
    border-radius:var(--r-card);
    box-shadow:var(--sh-card);
    overflow:hidden;
    transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  }
  .post-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:#D3E0F5}
  .post-thumb{
    position:relative;
    aspect-ratio:16 / 9;
    overflow:hidden;
    background:#E9EFF9;
  }
  .post-thumb img{
    width:100%;
    height:100%;
    object-fit:cover;
    border-radius:0;
    transition:transform var(--ease);
  }
  .post-card:hover .post-thumb img{transform:scale(1.04)}
  .post-thumb .badge{
    position:absolute;
    left:12px;
    top:12px;
    height:26px;
    padding:0 11px;
    display:inline-flex;
    align-items:center;
    border-radius:var(--r-chip);
    background:rgba(255,255,255,.94);
    color:#C4551A;
    font-size:12.5px;
    font-weight:700;
    box-shadow:0 4px 12px rgba(23,56,120,.12);
  }
  .post-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
  .post-body h3{
    font-size:17px;
    line-height:1.55;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
  }
  .post-card:hover .post-body h3{color:var(--c-primary)}
  .post-body p{
    font-size:14px;
    color:var(--c-text-sub);
    line-height:1.72;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
  }
  .post-foot{
    margin-top:auto;
    display:flex;
    align-items:center;
    justify-content:space-between;
    font-size:13px;
    color:var(--c-text-sub);
    padding-top:12px;
    border-top:1px solid var(--c-line);
  }
  .post-foot .read{color:var(--c-primary);font-weight:600}
  .post-card:hover .post-foot .read{color:#12315F}

  /* ---------- CTA ---------- */
  .cta-band{
    background:var(--c-surface);
    border:1px solid var(--c-line);
    border-radius:var(--r-hero);
    box-shadow:var(--sh-card);
    padding:32px;
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:22px;
  }
  .cta-band h2{font-size:22px}
  .cta-band p{color:var(--c-text-sub);font-size:14.5px;margin-top:8px;max-width:640px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}

  .back-row{display:flex;justify-content:center;padding:8px 0 64px}

  /* ---------- footer ---------- */
  .site-footer{
    background:var(--c-primary-deep);
    color:#E4ECFA;
    padding:56px 0 0;
    margin-top:24px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1fr;
    gap:32px;
    padding-bottom:36px;
    border-bottom:1px solid rgba(255,255,255,.12);
  }
  .footer-brand{
    display:flex;
    align-items:center;
    gap:10px;
    font-size:18px;
    font-weight:700;
    color:#fff;
  }
  .footer-brand .brand-mark{background:rgba(255,255,255,.14)}
  .footer-about{
    margin-top:14px;
    font-size:14px;
    line-height:1.8;
    color:#A9BDE0;
    max-width:340px;
  }
  .footer-col h3{
    font-size:15px;
    color:#fff;
    margin-bottom:16px;
  }
  .footer-col ul{display:grid;gap:10px}
  .footer-col a{color:#A9BDE0;font-size:14px}
  .footer-col a:hover{color:#fff}
  .footer-bottom{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    padding:20px 0 26px;
    font-size:13px;
    color:#8FA8D2;
  }

  /* ---------- responsive ---------- */
  @media (max-width:1024px){
    .nav-links{display:none}
    .search-box{display:none}
    .nav-toggle{display:inline-flex}
    .header-inner{height:62px;gap:14px}
    .article-shell{grid-template-columns:minmax(0,1fr);gap:24px}
    .article-card{padding:30px 28px 34px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
    .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
    .page-title{font-size:29px}
  }
  @media (max-width:768px){
    .container{padding:0 18px}
    .main-wrap{padding:34px 0 8px}
    .section{padding:52px 0}
    .page-head-inner{padding:26px 0 30px}
    .page-title{font-size:25px;letter-spacing:-0.4px}
    .article-body h2{font-size:20px}
    .article-body li{padding:11px 14px 11px 38px}
    .article-body li::before{left:16px;top:20px}
    .cta-band{padding:24px}
  }
  @media (max-width:640px){
    .grid-3{grid-template-columns:minmax(0,1fr)}
    .footer-grid{grid-template-columns:1fr}
    .section-head{flex-direction:column;align-items:flex-start;gap:10px}
  }
  @media (max-width:480px){
    body{font-size:15.5px}
    .section{padding:44px 0}
    .page-title{font-size:22px}
    .article-card{padding:22px 18px 26px;border-radius:14px}
    .btn{width:100%}
    .cta-actions{width:100%}
    .header-inner .btn{width:auto}
    .footer-bottom{flex-direction:column;align-items:flex-start}
  }

/* roulang page: category1 */
:root{
  --c-primary:#1E5AE8;
  --c-primary-deep:#12315F;
  --c-accent:#FF7A2F;
  --c-accent-soft:#FFF2E8;
  --c-bg:#F5F8FD;
  --c-surface:#FFFFFF;
  --c-line:#E3EAF5;
  --c-text:#17233A;
  --c-text-sub:#5A6B85;
  --c-ok:#1FA97A;
  --r-card:16px;
  --r-btn:12px;
  --r-chip:999px;
  --r-hero:20px;
  --sh-card:0 1px 2px rgba(23,56,120,.04),0 8px 24px rgba(23,56,120,.06);
  --sh-hover:0 4px 12px rgba(23,56,120,.08),0 18px 40px rgba(23,56,120,.10);
  --sh-nav:0 1px 0 rgba(23,56,120,.06);
  --container:1200px;
  --ease:240ms cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:12px}
a{color:inherit;text-decoration:none;transition:color var(--ease),opacity var(--ease)}
ul,ol{margin:0;padding:0;list-style:none}
button,input{font-family:inherit}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 24px}}
@media (min-width:1024px){.container{padding:0 32px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--c-line);
  box-shadow:var(--sh-nav);
  transition:box-shadow var(--ease);
}
.site-header.scrolled{box-shadow:0 8px 24px rgba(23,56,120,.08)}
.header-inner{display:flex;align-items:center;gap:20px;min-height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:19px;color:var(--c-text);flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:11px;display:grid;place-items:center;color:#fff;
  background:linear-gradient(135deg,#1E5AE8,#4F86F5);
  box-shadow:0 6px 16px rgba(30,90,232,.28);
}
.brand:hover .brand-mark{transform:translateY(-1px);transition:transform var(--ease)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:10px}
.nav-link{
  position:relative;display:inline-block;padding:8px 13px;border-radius:9px;
  font-size:15px;font-weight:500;color:var(--c-text-sub);white-space:nowrap;
  transition:color var(--ease),background var(--ease);
}
.nav-link:hover{color:var(--c-primary);background:#F1F6FF}
.nav-link.active{color:var(--c-primary);font-weight:700}
.nav-link.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:-3px;height:2px;
  border-radius:2px;background:var(--c-primary);
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.search-box{
  display:flex;align-items:center;gap:8px;height:44px;padding:0 14px;
  background:#F1F5FC;border:1px solid transparent;border-radius:var(--r-chip);
  transition:background var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.search-box svg{color:var(--c-text-sub);flex-shrink:0}
.search-box:focus-within{background:#fff;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(30,90,232,.14)}
.search-box input{
  border:0;outline:0;background:transparent;font-size:14px;color:var(--c-text);width:172px;
}
.search-box input::placeholder{color:var(--c-text-sub)}
.menu-toggle{
  display:none;align-items:center;justify-content:center;width:44px;height:44px;
  border-radius:12px;border:1px solid var(--c-line);background:#fff;color:var(--c-text);cursor:pointer;
  transition:background var(--ease),border-color var(--ease);
}
.menu-toggle:hover{background:#F1F6FF;border-color:#C9DAFB;color:var(--c-primary)}
.drawer{display:none;border-top:1px solid var(--c-line);background:#fff;padding:12px 0 18px}
.drawer.open{display:block}
.drawer .container{display:grid;gap:6px}
.drawer-link{
  display:block;padding:11px 14px;border-radius:12px;font-size:15px;font-weight:600;
  color:var(--c-text-sub);transition:background var(--ease),color var(--ease);
}
.drawer-link:hover{background:#F1F6FF;color:var(--c-primary)}
.drawer-link.active{background:#EAF1FF;color:var(--c-primary)}
.drawer-cta{margin-top:6px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),filter var(--ease);
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 8px 20px rgba(30,90,232,.24)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 12px 26px rgba(30,90,232,.28)}
.btn-primary:active{transform:translateY(0);filter:brightness(.98)}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 8px 20px rgba(255,122,47,.26)}
.btn-accent:hover{filter:brightness(1.05);transform:translateY(-1px)}
.btn-accent:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:#C9DAFB}
.btn-ghost:hover{background:#F4F8FF;border-color:var(--c-primary);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:10px}
.btn:disabled,.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}

/* ---------- hero ---------- */
.cat-hero{position:relative;padding:44px 0 64px;overflow:hidden;background:var(--c-bg)}
.cat-hero::before{
  content:"";position:absolute;left:-10%;right:-10%;top:-220px;height:620px;pointer-events:none;
  background:radial-gradient(52% 58% at 32% 30%, rgba(30,90,232,.11), rgba(30,90,232,0) 72%);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:radial-gradient(rgba(30,90,232,.10) 1px, transparent 1px);
  background-size:22px 22px;
  -webkit-mask-image:linear-gradient(to bottom, rgba(0,0,0,.55), transparent 72%);
  mask-image:linear-gradient(to bottom, rgba(0,0,0,.55), transparent 72%);
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:center}
.crumb{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--c-text-sub);margin-bottom:14px}
.crumb a{color:var(--c-text-sub)}
.crumb a:hover{color:var(--c-primary)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--r-chip);
  background:#EAF1FF;color:var(--c-primary);font-size:13px;font-weight:600;margin-bottom:16px;
}
.hero-title{font-size:40px;line-height:1.28;font-weight:700;letter-spacing:-.5px;margin:0 0 14px}
.hero-sub{font-size:16px;line-height:1.85;color:var(--c-text-sub);max-width:560px;margin:0 0 26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:24px}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px 18px}
.hero-badges li{display:inline-flex;align-items:center;gap:7px;font-size:14px;color:var(--c-text-sub)}
.dot{width:8px;height:8px;border-radius:50%;background:var(--c-ok);box-shadow:0 0 0 4px rgba(31,169,122,.14)}
.dot.blue{background:var(--c-primary);box-shadow:0 0 0 4px rgba(30,90,232,.14)}
.dot.orange{background:var(--c-accent);box-shadow:0 0 0 4px rgba(255,122,47,.16)}
.hero-media{position:relative}
.device-card{
  position:relative;border-radius:var(--r-hero);overflow:hidden;background:#fff;
  border:1px solid var(--c-line);box-shadow:var(--sh-hover);aspect-ratio:4/3;
}
.device-card img{width:100%;height:100%;object-fit:cover;border-radius:0}
.device-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top, rgba(18,49,95,.34), rgba(18,49,95,0) 55%);
}
.float-card{
  position:absolute;left:-14px;bottom:22px;display:flex;align-items:center;gap:12px;
  background:#fff;border:1px solid var(--c-line);border-radius:14px;padding:12px 16px;
  box-shadow:var(--sh-hover);
}
.float-rating{
  width:46px;height:46px;border-radius:12px;display:grid;place-items:center;
  background:var(--c-accent-soft);color:#C4551A;font-size:16px;font-weight:700;
}
.float-card strong{display:block;font-size:14px;font-weight:700;line-height:1.5}
.float-card span{display:block;font-size:12px;color:var(--c-text-sub);line-height:1.6}
.stats-bar{
  position:relative;z-index:1;margin-top:44px;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-hero);box-shadow:var(--sh-card);
  display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:24px 12px;
}
.stat{text-align:center;padding:0 12px;border-right:1px solid var(--c-line)}
.stat:last-child{border-right:0}
.stat-num{display:block;font-size:26px;font-weight:700;color:var(--c-primary);line-height:1.4;letter-spacing:-.3px}
.stat-label{display:block;font-size:13px;color:var(--c-text-sub);margin-top:2px}

/* ---------- sections ---------- */
.section{padding:64px 0}
.section.alt{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:30px;flex-wrap:wrap}
.section-title{font-size:26px;font-weight:700;letter-spacing:-.3px;line-height:1.4}
.section-desc{margin-top:8px;font-size:15px;color:var(--c-text-sub);max-width:720px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary)}
.link-more:hover{color:#1546BE;gap:10px}

/* ---------- filter ---------- */
.filter-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.chip{
  padding:9px 18px;border-radius:var(--r-chip);background:#fff;border:1px solid var(--c-line);
  color:var(--c-text-sub);font-size:14px;font-weight:500;cursor:pointer;
  transition:color var(--ease),background var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.chip:hover{color:var(--c-primary);border-color:#BFD4F8;transform:translateY(-1px)}
.chip.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;box-shadow:0 8px 18px rgba(30,90,232,.22)}

/* ---------- game cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.game-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);box-shadow:var(--sh-card);overflow:hidden;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.game-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:#CFE0FA}
.game-card.is-hidden{display:none}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#E8EFFA}
.card-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 420ms cubic-bezier(.4,0,.2,1)}
.game-card:hover .card-media img{transform:scale(1.04)}
.card-badge{
  position:absolute;left:12px;top:12px;padding:5px 12px;border-radius:var(--r-chip);
  background:rgba(255,255,255,.94);color:var(--c-primary);font-size:12px;font-weight:700;
  box-shadow:0 4px 12px rgba(23,56,120,.12);
}
.card-body{padding:18px 18px 16px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-title{font-size:17px;font-weight:700;line-height:1.55;letter-spacing:-.2px}
.card-title a:hover{color:var(--c-primary)}
.card-desc{
  font-size:14px;color:var(--c-text-sub);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:var(--r-chip);
  background:#F1F5FC;color:var(--c-text-sub);font-size:12px;font-weight:500;
}
.tag.accent{background:var(--c-accent-soft);color:#C4551A}
.card-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:14px;border-top:1px dashed var(--c-line);
}
.card-meta{font-size:12px;color:var(--c-text-sub);line-height:1.6}
.card-meta b{color:var(--c-text);font-weight:700;font-size:13px}
.empty-state{
  border:1px dashed #C9DAFB;background:#F7FAFF;border-radius:var(--r-card);
  padding:34px 20px;text-align:center;color:var(--c-text-sub);font-size:14px;grid-column:1/-1;
}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:48px;align-items:center}
.split + .split{margin-top:56px}
.split-media{position:relative;border-radius:var(--r-hero);overflow:hidden;border:1px solid var(--c-line);box-shadow:var(--sh-card);background:#E8EFFA;aspect-ratio:4/3}
.split-media img{width:100%;height:100%;object-fit:cover;border-radius:0}
.split.reverse .split-media{order:-1}
.split-title{font-size:23px;font-weight:700;line-height:1.5;letter-spacing:-.3px;margin-bottom:14px}
.split-text{font-size:15px;color:var(--c-text-sub);line-height:1.9;margin-bottom:18px}
.check-list{display:grid;gap:12px}
.check-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;line-height:1.8}
.check-list .tick{
  flex-shrink:0;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;
  background:#E7F7F1;color:var(--c-ok);font-size:13px;font-weight:700;margin-top:5px;
}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.step{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:24px 20px;
  box-shadow:var(--sh-card);transition:transform var(--ease),box-shadow var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-hover)}
.step-num{
  display:inline-grid;place-items:center;width:36px;height:36px;border-radius:11px;
  background:#EAF1FF;color:var(--c-primary);font-size:15px;font-weight:700;margin-bottom:14px;
}
.step h3{font-size:16px;font-weight:700;line-height:1.6;margin-bottom:8px}
.step p{font-size:14px;color:var(--c-text-sub);line-height:1.8}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px;max-width:920px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-card);overflow:hidden}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;min-height:62px;background:transparent;border:0;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--c-text);text-align:left;line-height:1.6;
  transition:background var(--ease),color var(--ease);
}
.faq-q:hover{background:#F7FAFF;color:var(--c-primary)}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  background:#F1F5FC;color:var(--c-primary);font-size:16px;font-weight:700;line-height:1;
  transition:transform var(--ease),background var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:#EAF1FF}
.faq-a{max-height:0;overflow:hidden;background:#FAFCFF;transition:max-height 300ms cubic-bezier(.4,0,.2,1)}
.faq-item.open .faq-a{max-height:340px}
.faq-a p{padding:4px 22px 20px;font-size:15px;color:var(--c-text-sub);line-height:1.9}

/* ---------- cta ---------- */
.cta-band{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-hero);
  padding:36px 34px;box-shadow:var(--sh-card);
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:23px;font-weight:700;letter-spacing:-.3px;line-height:1.5}
.cta-band p{margin-top:8px;font-size:15px;color:var(--c-text-sub);max-width:620px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--c-primary-deep);color:#fff;padding:56px 0 0;margin-top:64px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;margin-bottom:12px}
.footer-brand .brand-mark{width:30px;height:30px;border-radius:9px;background:rgba(255,255,255,.14);box-shadow:none}
.footer-about{margin:0;max-width:330px;font-size:14px;line-height:1.85;color:#A9BDE0}
.footer-col h3{font-size:15px;font-weight:700;margin:0 0 14px;color:#fff}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:#A9BDE0}
.footer-col a:hover{color:#fff}
.footer-bottom{
  margin-top:40px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:#8FA6CE;
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .hero-title{font-size:36px}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .search-box{display:none}
  .menu-toggle{display:inline-flex}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-title{font-size:33px}
  .float-card{left:12px}
  .stats-bar{grid-template-columns:repeat(2,1fr);row-gap:20px}
  .stat:nth-child(2){border-right:0}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:1fr;gap:28px}
  .split.reverse .split-media{order:0}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  body{font-size:15px}
  .section{padding:48px 0}
  .hero-title{font-size:28px}
  .section-title{font-size:22px}
  .cta-band{padding:28px 22px}
  .card-grid{grid-template-columns:1fr}
  .filter-row{overflow-x:auto;flex-wrap:nowrap;padding-bottom:6px;-webkit-overflow-scrolling:touch}
  .filter-row::-webkit-scrollbar{height:4px}
  .filter-row::-webkit-scrollbar-thumb{background:#C9DAFB;border-radius:99px}
  .chip{flex:0 0 auto}
  .hero-actions .btn{flex:1 1 100%}
}
@media (max-width:519px){
  .container{padding:0 18px}
  .section{padding:44px 0}
  .hero-title{font-size:25px}
  .stats-bar{grid-template-columns:1fr;padding:18px 10px}
  .stat{border-right:0;border-bottom:1px solid var(--c-line);padding-bottom:14px}
  .stat:last-child{border-bottom:0;padding-bottom:0}
  .steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .cta-actions .btn{width:100%}
}

/* roulang page: category2 */
:root{
  --c-primary:#1E5AE8;
  --c-primary-deep:#12315F;
  --c-accent:#FF7A2F;
  --c-accent-soft:#FFF2E8;
  --c-bg:#F5F8FD;
  --c-surface:#FFFFFF;
  --c-line:#E3EAF5;
  --c-text:#17233A;
  --c-text-sub:#5A6B85;
  --c-ok:#1FA97A;
  --r-card:16px;
  --r-btn:12px;
  --r-chip:999px;
  --r-hero:20px;
  --sh-card:0 1px 2px rgba(23,56,120,.04),0 8px 24px rgba(23,56,120,.06);
  --sh-hover:0 4px 12px rgba(23,56,120,.08),0 18px 40px rgba(23,56,120,.10);
  --sh-nav:0 1px 0 rgba(23,56,120,.06);
  --container:1200px;
  --ease:240ms cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;background:#E9EFFA}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.35;letter-spacing:-.2px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
::selection{background:#D6E4FF;color:var(--c-primary-deep)}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 24px}}
@media(min-width:1024px){.container{padding:0 32px}}
.section{padding:64px 0}
@media(min-width:1024px){.section{padding:80px 0}}
.section-plain{background:var(--c-bg)}
.section-alt{background:#FFFFFF;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--c-line);box-shadow:var(--sh-nav);
  transition:box-shadow var(--ease);
}
.site-header.scrolled{box-shadow:0 6px 20px rgba(23,56,120,.08)}
.nav-inner{
  max-width:var(--container);margin:0 auto;height:72px;
  padding:0 20px;display:flex;align-items:center;gap:18px;
}
@media(min-width:768px){.nav-inner{padding:0 24px}}
@media(min-width:1024px){.nav-inner{padding:0 32px;gap:24px}}
.brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;color:var(--c-text);flex:none;transition:opacity var(--ease)}
.brand:hover{opacity:.85}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;color:#fff;
  background:linear-gradient(135deg,var(--c-primary) 0%,#3D7BFF 100%);
  box-shadow:0 4px 12px rgba(30,90,232,.28);flex:none;
}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-link{
  position:relative;padding:9px 12px;font-size:15px;color:var(--c-text-sub);
  border-radius:8px;transition:color var(--ease),background var(--ease);white-space:nowrap;
}
.nav-link:hover{color:var(--c-primary);background:#F1F6FF}
.nav-link:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.nav-link.active{color:var(--c-primary);font-weight:700}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{
  display:flex;align-items:center;gap:8px;height:44px;padding:0 16px;
  background:#F3F6FC;border:1px solid transparent;border-radius:var(--r-chip);
  transition:border-color var(--ease),background var(--ease),box-shadow var(--ease);
}
.nav-search:focus-within{border-color:var(--c-primary);background:#fff;box-shadow:0 0 0 3px rgba(30,90,232,.12)}
.nav-search svg{flex:none;color:var(--c-text-sub)}
.nav-search input{border:0;outline:0;background:transparent;font-size:14px;width:132px;color:var(--c-text);font-family:inherit}
.nav-search input::placeholder{color:var(--c-text-sub)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--c-line);
  background:#fff;color:var(--c-text);align-items:center;justify-content:center;cursor:pointer;
  transition:background var(--ease),border-color var(--ease);
}
.nav-toggle:hover{background:#F3F7FF;border-color:#CBDCFB}
.nav-toggle:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
  white-space:nowrap;
}
.btn:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 6px 16px rgba(30,90,232,.24)}
.btn-primary:hover{background:#2A66F0;transform:translateY(-1px);box-shadow:0 10px 22px rgba(30,90,232,.28)}
.btn-primary:active{transform:none;box-shadow:0 4px 10px rgba(30,90,232,.22)}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 6px 16px rgba(255,122,47,.26)}
.btn-accent:hover{background:#FF8A47;transform:translateY(-1px)}
.btn-accent:active{transform:none}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:#CBDCFB}
.btn-ghost:hover{background:#F3F7FF;border-color:var(--c-primary);transform:translateY(-1px)}
.btn-ghost:active{transform:none}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}

/* ---------- 首屏横幅 ---------- */
.page-banner{position:relative;overflow:hidden;border-bottom:1px solid var(--c-line);background:#EEF4FF}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(112deg,rgba(240,246,255,.97) 0%,rgba(240,246,255,.9) 48%,rgba(240,246,255,.7) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.banner-inner{
  position:relative;display:grid;grid-template-columns:1fr;gap:32px;
  padding-top:44px;padding-bottom:72px;align-items:center;
}
@media(min-width:1024px){
  .banner-inner{grid-template-columns:1.15fr .85fr;gap:56px;padding-top:56px;padding-bottom:104px}
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-text-sub);margin-bottom:14px}
.breadcrumb a{color:var(--c-text-sub);transition:color var(--ease)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb span[aria-current]{color:var(--c-primary);font-weight:600}
.banner-text h1{font-size:clamp(28px,4.4vw,42px);font-weight:800;color:var(--c-primary-deep);letter-spacing:-.5px}
.banner-sub{margin-top:16px;font-size:16px;color:var(--c-text-sub);max-width:600px}
.banner-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.banner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.chip{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;
  border-radius:var(--r-chip);font-size:13px;background:#F1F4FA;color:var(--c-text-sub);
  border:1px solid transparent;white-space:nowrap;
}
.chip-blue{background:#EAF1FF;color:var(--c-primary)}
.chip-accent{background:var(--c-accent-soft);color:#C4551A}
.chip-ok{background:#E8F7F1;color:var(--c-ok)}
.banner-card{
  position:relative;border-radius:var(--r-hero);overflow:hidden;background:#fff;
  border:1px solid var(--c-line);box-shadow:var(--sh-hover);
}
.banner-card img{width:100%;aspect-ratio:4/3;object-fit:cover}
.banner-float{
  position:absolute;left:14px;bottom:14px;display:flex;align-items:center;gap:10px;
  background:#fff;border-radius:14px;padding:10px 16px;box-shadow:0 8px 24px rgba(23,56,120,.14);
}
.banner-float .dot{width:9px;height:9px;border-radius:999px;background:var(--c-ok);box-shadow:0 0 0 4px rgba(31,169,122,.16)}
.banner-float strong{display:block;font-size:17px;font-weight:700;line-height:1.2;color:var(--c-text)}
.banner-float small{display:block;font-size:12px;color:var(--c-text-sub);line-height:1.4}

/* ---------- 数据条 ---------- */
.stat-strip-wrap{position:relative;z-index:2;margin-top:-48px}
@media(min-width:1024px){.stat-strip-wrap{margin-top:-64px}}
.stat-strip{
  display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--c-line);
  border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card);
}
@media(min-width:768px){.stat-strip{grid-template-columns:repeat(4,1fr)}}
.stat-item{background:#fff;padding:20px 22px;transition:background var(--ease)}
.stat-item:hover{background:#FAFCFF}
.stat-num{display:block;font-size:22px;font-weight:700;color:var(--c-primary-deep);line-height:1.3}
.stat-label{display:block;font-size:13px;color:var(--c-text-sub);margin-top:2px}

/* ---------- 区块标题 ---------- */
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.section-head h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--c-text);letter-spacing:-.4px}
.section-head p{margin-top:8px;font-size:15px;color:var(--c-text-sub);max-width:640px}
.section-link{font-size:14px;font-weight:600;color:var(--c-primary);display:inline-flex;align-items:center;gap:6px;transition:gap var(--ease)}
.section-link:hover{gap:10px}

/* ---------- 更新记录布局 ---------- */
.update-layout{display:grid;grid-template-columns:1fr;gap:24px;align-items:start}
@media(min-width:1024px){.update-layout{grid-template-columns:260px 1fr;gap:32px}}
.update-index{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:18px;box-shadow:var(--sh-card);
}
@media(min-width:1024px){.update-index{position:sticky;top:96px}}
.index-title{font-size:13px;font-weight:700;color:var(--c-text-sub);letter-spacing:.5px;margin-bottom:12px;padding-left:12px}
.index-list{display:flex;gap:8px;overflow-x:auto;padding-bottom:6px;scrollbar-width:none}
.index-list::-webkit-scrollbar{display:none}
@media(min-width:1024px){.index-list{display:block;overflow:visible;padding-bottom:0}}
.index-item{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  flex:0 0 auto;padding:10px 14px;border-radius:10px;font-size:15px;color:var(--c-text-sub);
  border-left:3px solid transparent;transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.index-item span{font-size:12px;color:#9AACC6}
.index-item:hover{background:#F3F7FF;color:var(--c-primary)}
.index-item:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.index-item.active{background:#F3F7FF;color:var(--c-primary);font-weight:700;border-left-color:var(--c-primary)}
.index-item.active span{color:var(--c-primary)}
@media(max-width:1023px){
  .index-item{border-left:0;border-bottom:3px solid transparent;border-radius:8px 8px 0 0}
  .index-item.active{border-left-color:transparent;border-bottom-color:var(--c-primary)}
  .index-title{padding-left:0}
}
.index-tip{
  margin-top:18px;padding:14px;border-radius:12px;background:#F7FAFF;border:1px dashed #C9DBF8;
  font-size:13px;color:var(--c-text-sub);line-height:1.7;
}
@media(max-width:1023px){.index-tip{display:none}}

.update-list{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card)}
.update-row{
  display:grid;grid-template-columns:56px 1fr 40px;gap:18px;padding:24px;
  border-top:1px solid var(--c-line);align-items:flex-start;
  transition:background var(--ease),transform var(--ease),box-shadow var(--ease);
}
.update-row:first-child{border-top:0}
.update-row:hover{background:#F5F9FF;transform:translateX(2px)}
.update-row:focus-visible{outline:2px solid var(--c-primary);outline-offset:-2px}
.row-num{font-size:20px;font-weight:700;color:#C3D2EA;line-height:1.4;transition:color var(--ease)}
.update-row:hover .row-num{color:var(--c-primary)}
.row-title{font-size:17px;font-weight:700;color:var(--c-text);transition:color var(--ease)}
.update-row:hover .row-title{color:var(--c-primary)}
.row-sum{
  margin-top:8px;font-size:14px;color:var(--c-text-sub);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.row-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:12px}
.row-time{font-size:13px;color:#8B9CB6}
.row-arrow{
  width:38px;height:38px;border-radius:999px;border:1px solid var(--c-line);
  display:grid;place-items:center;color:var(--c-primary);font-size:16px;align-self:center;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease);
}
.update-row:hover .row-arrow{background:var(--c-primary);color:#fff;border-color:var(--c-primary);transform:translateX(3px)}
@media(max-width:767px){
  .update-row{grid-template-columns:1fr;gap:0;padding:20px}
  .row-num{display:none}
  .row-arrow{display:none}
  .row-title{font-size:16px}
}

/* ---------- 升级步骤 ---------- */
.flow-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.flow-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.flow-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:26px;
  box-shadow:var(--sh-card);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.flow-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:#CBDCFB}
.flow-badge{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:#EAF1FF;color:var(--c-primary);font-weight:700;font-size:15px;margin-bottom:16px;
}
.flow-card h3{font-size:17px;font-weight:700;color:var(--c-text)}
.flow-card p{margin-top:10px;font-size:14px;color:var(--c-text-sub);line-height:1.8}

/* ---------- 适配图文 ---------- */
.compat-grid{display:grid;grid-template-columns:1fr;gap:32px;align-items:center}
@media(min-width:1024px){.compat-grid{grid-template-columns:1fr 1fr;gap:56px}}
.compat-media{border-radius:var(--r-hero);overflow:hidden;border:1px solid var(--c-line);box-shadow:var(--sh-card);background:#fff}
.compat-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.compat-text h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--c-text);letter-spacing:-.4px}
.compat-text > p{margin-top:14px;font-size:15px;color:var(--c-text-sub)}
.check-list{margin-top:22px;display:grid;gap:12px}
.check-list li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--c-text)}
.check-list .tick{
  flex:none;width:20px;height:20px;border-radius:999px;background:#E8F7F1;color:var(--c-ok);
  display:grid;place-items:center;font-size:12px;font-weight:700;margin-top:5px;
}
.compat-text .btn{margin-top:26px}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px}
.faq-item{background:#fff;border:1px solid var(--c-line);border-radius:14px;overflow:hidden;box-shadow:var(--sh-card);transition:border-color var(--ease)}
.faq-item:hover{border-color:#CBDCFB}
.faq-item.open{border-color:#B9D0FA}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;min-height:60px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--c-text);font-family:inherit;transition:color var(--ease),background var(--ease);
}
.faq-q:hover{color:var(--c-primary);background:#FAFCFF}
.faq-q:focus-visible{outline:2px solid var(--c-primary);outline-offset:-2px}
.faq-icon{
  flex:none;width:26px;height:26px;border-radius:999px;background:#EAF1FF;color:var(--c-primary);
  display:grid;place-items:center;font-size:16px;line-height:1;transition:transform var(--ease),background var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--c-primary);color:#fff}
.faq-a{
  max-height:0;overflow:hidden;background:#FAFCFF;color:var(--c-text-sub);font-size:15px;
  transition:max-height 300ms ease,padding 300ms ease;
}
.faq-item.open .faq-a{max-height:360px;padding:0 22px 20px}

/* ---------- 下载 CTA ---------- */
.download-panel{
  background:var(--c-primary-deep);border-radius:var(--r-hero);padding:36px 24px;color:#fff;
  box-shadow:0 20px 44px rgba(18,49,95,.24);
}
@media(min-width:1024px){.download-panel{padding:48px 48px 44px}}
.download-panel h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;color:#fff;letter-spacing:-.4px}
.download-panel > p{margin-top:12px;font-size:15px;color:#C6D6F2;max-width:680px}
.dl-grid{display:grid;grid-template-columns:1fr;gap:16px;margin-top:30px}
@media(min-width:640px){.dl-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.dl-grid{grid-template-columns:repeat(4,1fr)}}
.dl-item{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);border-radius:14px;
  padding:20px;transition:background var(--ease),transform var(--ease),border-color var(--ease);
}
.dl-item:hover{background:rgba(255,255,255,.12);transform:translateY(-4px);border-color:rgba(255,255,255,.32)}
.dl-icon{
  width:40px;height:40px;border-radius:12px;background:rgba(255,255,255,.14);
  display:grid;place-items:center;color:#fff;margin-bottom:14px;
}
.dl-name{font-size:16px;font-weight:700;color:#fff}
.dl-info{font-size:13px;color:#A9BDE0;margin-top:4px}
.dl-item .btn{margin-top:16px}

/* ---------- 底部 CTA 条 ---------- */
.cta-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:28px 26px;box-shadow:var(--sh-card);
}
.cta-bar h2{font-size:20px;font-weight:700;color:var(--c-text)}
.cta-bar p{margin-top:6px;font-size:14px;color:var(--c-text-sub)}
.cta-bar .btn{flex:none}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-primary-deep);color:#D6E3F7;margin-top:8px}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:32px;padding:56px 0 36px;
}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff}
.footer-brand .brand-mark{background:rgba(255,255,255,.14);box-shadow:none}
.footer-about{margin-top:14px;font-size:14px;color:#A9BDE0;max-width:320px;line-height:1.8}
.footer-col h3{font-size:15px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:#A9BDE0;transition:color var(--ease)}
.footer-col a:hover{color:#fff}
.footer-col a:focus-visible{outline:2px solid #fff;outline-offset:2px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  padding:18px 0 26px;border-top:1px solid rgba(255,255,255,.14);
  font-size:13px;color:#8FA6CE;
}

/* ---------- 响应式导航 ---------- */
@media(max-width:1023px){
  .nav-toggle{display:inline-flex}
  .nav-links{
    position:fixed;left:0;right:0;top:72px;z-index:55;
    flex-direction:column;align-items:stretch;gap:4px;margin:0;
    background:#fff;border-bottom:1px solid var(--c-line);
    padding:14px 20px 20px;box-shadow:0 18px 32px rgba(23,56,120,.12);
    display:none;
  }
  body.nav-open .nav-links{display:flex}
  .nav-link{padding:12px 14px;font-size:16px}
  .nav-link.active::after{left:14px;right:auto;width:22px;bottom:8px}
  .nav-search{display:none}
}
@media(max-width:640px){
  .nav-inner{height:64px;gap:10px}
  .nav-links{top:64px}
  .brand{font-size:17px}
  .brand-mark{width:30px;height:30px}
  .nav-actions .btn{height:40px;padding:0 14px;font-size:14px}
  .section{padding:48px 0}
  .banner-actions .btn{width:100%}
  .stat-item{padding:16px 18px}
  .stat-num{font-size:19px}
  .cta-bar{padding:22px 20px}
  .cta-bar .btn{width:100%}
}

/* roulang page: category3 */
:root{
  --c-primary:#1E5AE8;
  --c-primary-deep:#12315F;
  --c-accent:#FF7A2F;
  --c-accent-soft:#FFF2E8;
  --c-bg:#F5F8FD;
  --c-surface:#FFFFFF;
  --c-line:#E3EAF5;
  --c-text:#17233A;
  --c-text-sub:#5A6B85;
  --c-ok:#1FA97A;
  --r-card:16px;
  --r-btn:12px;
  --r-chip:999px;
  --r-hero:20px;
  --sh-card:0 1px 2px rgba(23,56,120,.04),0 8px 24px rgba(23,56,120,.06);
  --sh-hover:0 4px 12px rgba(23,56,120,.08),0 18px 40px rgba(23,56,120,.10);
  --sh-nav:0 1px 0 rgba(23,56,120,.06);
  --container:1200px;
  --ease:240ms cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:12px;background:#E8EFFB}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}
::selection{background:rgba(30,90,232,.16)}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:768px){.container{padding:0 24px}}
@media (min-width:1024px){.container{padding:0 32px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(23,56,120,.08)}
.header-inner{display:flex;align-items:center;gap:18px;height:70px}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:19px;font-weight:700;color:var(--c-text);white-space:nowrap;
}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;color:#fff;
  background:linear-gradient(135deg,#1E5AE8,#4C86F5);
  box-shadow:0 6px 14px rgba(30,90,232,.28);
}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{
  position:relative;display:flex;align-items:center;height:70px;
  padding:0 13px;font-size:15px;color:var(--c-text-sub);
  transition:color var(--ease),background var(--ease);
  border-radius:10px;
}
.nav-link:hover{color:var(--c-primary);background:#F2F7FF}
.nav-link.active{color:var(--c-primary);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:16px;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:12px}
.search-box{
  display:flex;align-items:center;gap:8px;
  height:42px;padding:0 14px;border-radius:var(--r-chip);
  background:#F2F5FB;border:1px solid transparent;color:var(--c-text-sub);
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.search-box:focus-within{border-color:var(--c-primary);background:#fff;box-shadow:0 0 0 4px rgba(30,90,232,.12)}
.search-box input{
  width:150px;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--c-text);
}
.search-box input::placeholder{color:var(--c-text-sub)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  align-items:center;justify-content:center;color:var(--c-text);
  border:1px solid var(--c-line);background:#fff;
  transition:background var(--ease),color var(--ease);
}
.nav-toggle:hover{background:#F2F7FF;color:var(--c-primary)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  transition:transform var(--ease),box-shadow var(--ease),filter var(--ease),background var(--ease),color var(--ease);
  white-space:nowrap;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0);filter:brightness(.97)}
.btn-sm{height:42px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 8px 18px rgba(30,90,232,.24)}
.btn-primary:hover{filter:brightness(1.06);box-shadow:0 12px 24px rgba(30,90,232,.28)}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 8px 18px rgba(255,122,47,.24)}
.btn-accent:hover{filter:brightness(1.06)}
.btn-ghost{background:#fff;color:var(--c-primary);border:1px solid #C9DBFA}
.btn-ghost:hover{background:#F2F7FF}
.btn-on-dark{background:#fff;color:var(--c-primary-deep)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;transform:none}

/* ---------- chips ---------- */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:var(--r-chip);
  font-size:13px;font-weight:600;line-height:1.6;
  background:#EEF4FF;color:var(--c-primary);border:1px solid #DCE8FF;
}
.chip-accent{background:var(--c-accent-soft);color:#D9601B;border-color:#FFE0CB}
.chip-ok{background:#EAF9F3;color:#158F67;border-color:#CFF0E3}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#EDF3FF 0%,#F5F8FD 100%);border-bottom:1px solid var(--c-line)}
.hero-bg{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(circle at 16% 20%, rgba(30,90,232,.12), transparent 44%),
    radial-gradient(circle at 84% 6%, rgba(255,122,47,.10), transparent 40%),
    radial-gradient(rgba(23,56,120,.06) 1px, transparent 1px);
  background-size:auto,auto,18px 18px;
}
.hero-grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:48px;align-items:center;
  padding-top:64px;padding-bottom:64px;
}
.hero-copy .chip{margin-bottom:18px}
.hero h1{
  font-size:40px;line-height:1.28;font-weight:800;letter-spacing:-.5px;
  color:var(--c-text);margin-bottom:16px;
}
.hero h1 em{font-style:normal;color:var(--c-primary)}
.hero-sub{font-size:17px;color:var(--c-text-sub);max-width:600px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px}
.hero-card{
  position:relative;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-hero);box-shadow:var(--sh-card);padding:14px;
}
.hero-card img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:14px}
.hero-float{
  position:absolute;left:-16px;bottom:26px;
  background:#fff;border:1px solid var(--c-line);border-radius:14px;
  box-shadow:var(--sh-hover);padding:12px 16px;display:flex;align-items:center;gap:12px;
}
.hero-float strong{display:block;font-size:18px;font-weight:700;line-height:1.3}
.hero-float span{font-size:12px;color:var(--c-text-sub)}
.hero-float .stars{color:var(--c-accent);font-size:13px;letter-spacing:1px}

/* ---------- stats band ---------- */
.stats-band{background:#fff;border-bottom:1px solid var(--c-line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat{padding:26px 20px;border-right:1px dashed var(--c-line);text-align:center}
.stat:last-child{border-right:0}
.stat strong{display:block;font-size:30px;font-weight:800;color:var(--c-primary);line-height:1.3}
.stat span{font-size:13px;color:var(--c-text-sub)}

/* ---------- section ---------- */
.section{padding:80px 0}
.section-alt{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section-head{max-width:720px;margin-bottom:40px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;color:var(--c-primary);
  background:#EEF4FF;border-radius:var(--r-chip);padding:4px 12px;margin-bottom:14px;
}
.section-head h2{font-size:29px;line-height:1.4;font-weight:700;letter-spacing:-.3px;margin-bottom:12px}
.section-head p{color:var(--c-text-sub);font-size:15.5px}

/* ---------- scene cards ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);padding:26px;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:#D3E1FB}
.scene-icon{
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  background:#EEF4FF;color:var(--c-primary);margin-bottom:16px;
}
.scene-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.scene-card p{font-size:14.5px;color:var(--c-text-sub);margin-bottom:14px}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- timeline ---------- */
.timeline{position:relative;display:flex;flex-direction:column;gap:34px}
.tl-item{display:grid;grid-template-columns:210px minmax(0,1fr);gap:28px;align-items:start}
.tl-marker{position:relative;padding-left:38px;padding-top:8px}
.tl-marker::before{
  content:"";position:absolute;left:11px;top:34px;bottom:-42px;width:2px;
  background:linear-gradient(180deg,#D6E3FB,#EEF4FF);
}
.tl-item:last-child .tl-marker::before{display:none}
.tl-dot{
  position:absolute;left:0;top:6px;width:24px;height:24px;border-radius:999px;
  background:#fff;border:2px solid var(--c-primary);color:var(--c-primary);
  font-size:11px;font-weight:700;display:grid;place-items:center;line-height:1;
  box-shadow:0 0 0 4px rgba(30,90,232,.10);
}
.tl-step{display:block;font-size:16px;font-weight:700;margin-bottom:4px}
.tl-time{font-size:13px;color:var(--c-text-sub)}
.tl-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);padding:18px;display:grid;grid-template-columns:250px minmax(0,1fr);gap:22px;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.tl-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:#D3E1FB}
.tl-card img{width:100%;aspect-ratio:16/9;height:100%;object-fit:cover;border-radius:12px}
.tl-body h3{font-size:19px;font-weight:700;margin-bottom:10px}
.tl-body > p{font-size:14.5px;color:var(--c-text-sub);margin-bottom:12px}
.check-list{display:flex;flex-direction:column;gap:8px}
.check-list li{
  position:relative;padding-left:22px;font-size:14px;color:var(--c-text);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:999px;
  background:var(--c-ok);box-shadow:0 0 0 3px rgba(31,169,122,.14);
}

/* ---------- trouble cards ---------- */
.trouble-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.trouble-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);padding:24px 26px;
  transition:transform var(--ease),box-shadow var(--ease);
}
.trouble-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover)}
.trouble-card h3{font-size:17px;font-weight:700;margin:12px 0 10px}
.trouble-card p{font-size:14.5px;color:var(--c-text-sub)}
.trouble-card .fix{
  margin-top:14px;padding-top:14px;border-top:1px dashed var(--c-line);
  font-size:14px;color:var(--c-text);
}
.trouble-card .fix b{color:var(--c-primary)}

/* ---------- download panel ---------- */
.dl-panel{
  background:linear-gradient(135deg,#12315F 0%,#1B4483 100%);
  border-radius:var(--r-hero);padding:38px;color:#fff;
  box-shadow:0 24px 50px rgba(18,49,95,.24);
}
.dl-head{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;justify-content:space-between;margin-bottom:26px}
.dl-head h2{font-size:26px;font-weight:700;margin-bottom:6px}
.dl-head p{font-size:14.5px;color:#B9CDEE}
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.dl-item{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);
  border-radius:var(--r-card);padding:20px;display:flex;flex-direction:column;gap:12px;
  transition:background var(--ease),transform var(--ease);
}
.dl-item:hover{background:rgba(255,255,255,.12);transform:translateY(-3px)}
.dl-plat{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700}
.dl-plat .plat-icon{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:rgba(255,255,255,.14);font-size:12px;font-weight:700;
}
.dl-meta{font-size:13px;color:#B9CDEE;line-height:1.7}
.dl-item .btn{width:100%;height:42px;font-size:14px}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;margin:0 auto}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);overflow:hidden;transition:box-shadow var(--ease),border-color var(--ease);
}
.faq-item:hover{border-color:#D3E1FB}
.faq-item.is-open{box-shadow:var(--sh-hover)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:62px;padding:14px 22px;text-align:left;font-size:16px;font-weight:600;
}
.faq-icon{
  position:relative;flex:0 0 20px;width:20px;height:20px;border-radius:6px;
  background:#EEF4FF;transition:transform var(--ease),background var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-primary);border-radius:2px;
}
.faq-icon::before{width:10px;height:2px;transform:translate(-50%,-50%)}
.faq-icon::after{width:2px;height:10px;transform:translate(-50%,-50%)}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:#DCE8FF}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--ease);background:#FAFCFF}
.faq-a p{padding:0 22px 20px;font-size:14.5px;color:var(--c-text-sub)}

/* ---------- cta ---------- */
.cta-band{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-hero);
  box-shadow:var(--sh-card);padding:36px;
  display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:space-between;
}
.cta-band h2{font-size:24px;font-weight:700;margin-bottom:8px}
.cta-band p{font-size:15px;color:var(--c-text-sub);max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- footer ---------- */
.site-footer{background:var(--c-primary-deep);color:#fff;margin-top:12px;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:38px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;margin-bottom:14px}
.footer-about{font-size:14px;color:#A9BDE0;max-width:340px;line-height:1.8}
.footer-col h3{font-size:15px;font-weight:700;margin-bottom:14px;color:#fff}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:#A9BDE0;transition:color var(--ease)}
.footer-col a:hover{color:#fff}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);padding:18px 0 24px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:#8FA6CE;
}

/* ---------- keyframes ---------- */
@keyframes floatUp{
  from{opacity:0;transform:translateY(14px)}
  to{opacity:1;transform:translateY(0)}
}
.hero-copy,.hero-card{animation:floatUp 520ms cubic-bezier(.4,0,.2,1) both}
.hero-card{animation-delay:90ms}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .search-box input{width:112px}
  .nav-link{padding:0 10px;font-size:14.5px}
}
@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  .nav-links{
    position:absolute;left:0;right:0;top:70px;
    flex-direction:column;align-items:stretch;gap:4px;
    background:#fff;border-bottom:1px solid var(--c-line);
    padding:14px 20px 20px;display:none;
    box-shadow:0 20px 34px rgba(23,56,120,.12);
  }
  .nav-links.is-open{display:flex}
  .nav-link{height:auto;padding:12px 14px;font-size:16px;border-radius:12px}
  .nav-link.active::after{display:none}
  .nav-link.active{background:#F2F7FF}
  .search-box{display:none}
  .hero-grid{grid-template-columns:1fr;gap:34px;padding-top:48px;padding-bottom:52px}
  .hero h1{font-size:32px}
  .tl-item{grid-template-columns:1fr;gap:12px}
  .tl-marker{padding-left:34px;padding-top:0}
  .tl-marker::before{display:none}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat{border-right:0;border-bottom:1px dashed var(--c-line)}
  .stat:nth-child(odd){border-right:1px dashed var(--c-line)}
  .stat:nth-last-child(-n+2){border-bottom:0}
  .dl-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  .section{padding:64px 0}
  .hero h1{font-size:28px}
  .hero-sub{font-size:16px}
  .hero-float{left:12px;bottom:12px}
  .scene-grid{grid-template-columns:1fr}
  .trouble-grid{grid-template-columns:1fr}
  .tl-card{grid-template-columns:1fr;gap:16px}
  .tl-card img{height:auto}
  .cta-band{padding:26px}
  .dl-panel{padding:26px}
  .section-head h2{font-size:24px}
  .hero-actions .btn{flex:1 1 100%}
}
@media (max-width:520px){
  .stats-grid{grid-template-columns:1fr}
  .stat{border-right:0!important;border-bottom:1px dashed var(--c-line)}
  .stat:last-child{border-bottom:0}
  .dl-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero h1{font-size:25px}
  .brand{font-size:17px}
  .section{padding:48px 0}
  .faq-q{font-size:15px;padding:12px 18px}
  .faq-a p{padding:0 18px 18px}
}