/* roulang page: index */
/* ============ 1. 设计变量 ============ */
:root{
  --bg-0:#0B1220;
  --bg-1:#0E1A2E;
  --bg-2:#101F36;
  --bg-deep:#070D17;
  --glass:rgba(255,255,255,.05);
  --glass-strong:rgba(255,255,255,.08);
  --line:rgba(30,58,95,.95);
  --line-soft:rgba(255,255,255,.09);
  --cyan:#22D3EE;
  --cyan-dim:rgba(34,211,238,.18);
  --blue:#3B82F6;
  --sky:#7DD3FC;
  --star:#FACC15;
  --text:#E8EEF8;
  --text-strong:#FFFFFF;
  --muted:#94A6BF;
  --radius-lg:16px;
  --radius-md:14px;
  --radius-sm:12px;
  --shadow:0 8px 30px rgba(0,0,0,.35);
  --shadow-lift:0 14px 40px rgba(0,0,0,.45);
  --glow:0 10px 30px rgba(34,211,238,.25);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --sec-pad:96px;
  --sec-pad-m:56px;
}
/* ============ 2. 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;padding:0;background:var(--bg-0);color:var(--text);
  font-family:var(--font);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img{display:block;max-width:100%;height:auto;border-radius:var(--radius-sm)}
a{color:inherit;text-decoration:none;transition:color .22s ease,background-color .22s ease,border-color .22s ease,transform .22s ease}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,select,textarea{font-family:inherit;font-size:15px}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
::selection{background:rgba(34,211,238,.3);color:#fff}
/* ============ 3. 容器与通用排版 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:var(--sec-pad) 0;position:relative}
.section--tight{padding:72px 0}
.section--deep{background:var(--bg-deep)}
.section--panel{background:linear-gradient(180deg,var(--bg-1) 0%,var(--bg-0) 100%)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;color:var(--sky);
  text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent)}
.sec-head{max-width:720px;margin-bottom:44px}
.sec-head--center{margin-left:auto;margin-right:auto;text-align:center}
.sec-title{font-size:clamp(24px,2.6vw,30px);font-weight:700;line-height:1.35;color:var(--text-strong);letter-spacing:.01em}
.sec-desc{margin-top:14px;color:var(--muted);font-size:16px;line-height:1.85}
.rule{height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent)}
/* ============ 4. 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1.2;white-space:nowrap;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,border-color .2s ease,color .2s ease;
}
.btn i{font-size:14px}
.btn-primary{
  background:linear-gradient(135deg,#22D3EE,#3B82F6);color:#04121F;
  box-shadow:0 6px 20px rgba(34,211,238,.22);
}
.btn-primary:hover,.btn-primary:focus{
  transform:translateY(-2px);color:#04121F;
  box-shadow:0 0 0 1px rgba(34,211,238,.5),var(--glow);
}
.btn-ghost{
  background:var(--glass);color:var(--text);
  border:1px solid rgba(34,211,238,.42);
}
.btn-ghost:hover,.btn-ghost:focus{
  background:rgba(34,211,238,.1);color:#fff;border-color:var(--cyan);
  transform:translateY(-2px);
}
.btn-outline{
  background:transparent;border:1px solid var(--line-soft);color:var(--text);
}
.btn-outline:hover,.btn-outline:focus{border-color:var(--cyan);color:var(--sky);transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-lg{padding:16px 34px;font-size:16px}
.btn-block{width:100%}
/* ============ 5. 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;font-size:12px;font-weight:600;
  color:var(--sky);background:rgba(34,211,238,.1);
  border:1px solid rgba(34,211,238,.28);letter-spacing:.02em;
}
.badge--soft{color:var(--muted);background:var(--glass);border-color:var(--line-soft)}
.badge--warm{color:#FDE68A;background:rgba(250,204,21,.1);border-color:rgba(250,204,21,.3)}
/* ============ 6. 玻璃卡 ============ */
.glass{
  background:var(--glass);border:1px solid var(--line-soft);
  border-radius:var(--radius-lg);backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);box-shadow:var(--shadow);
}
/* ============ 7. 头部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  padding:14px 0;background:rgba(11,18,32,.72);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,border-color .25s ease,padding .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:rgba(9,15,27,.92);border-bottom:1px solid var(--line);
  padding:10px 0;box-shadow:0 8px 26px rgba(0,0,0,.4);
}
.nav-wrap{display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(34,211,238,.95),rgba(59,130,246,.9));
  color:#04121F;font-weight:800;font-size:17px;
  box-shadow:0 6px 18px rgba(34,211,238,.28);
}
.brand-text{font-size:16px;font-weight:700;color:var(--text-strong);letter-spacing:.01em;white-space:nowrap}
.brand-text small{display:block;font-size:11px;font-weight:400;color:var(--muted);letter-spacing:.06em}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-links a{
  padding:9px 14px;border-radius:10px;font-size:14.5px;color:var(--muted);
  border:1px solid transparent;position:relative;
}
.nav-links a:hover{color:var(--text-strong);background:var(--glass)}
.nav-links a.active{color:var(--sky);background:rgba(34,211,238,.1);border-color:rgba(34,211,238,.24)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{
  display:flex;align-items:center;gap:9px;padding:8px 12px;
  background:var(--glass);border:1px solid var(--line-soft);border-radius:10px;
  transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.nav-search:focus-within{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,211,238,.14);background:rgba(34,211,238,.06)}
.nav-search i{color:var(--muted);font-size:13px}
.nav-search input{
  width:150px;background:transparent;border:0;outline:none;color:var(--text);font-size:14px;
}
.nav-search input::placeholder{color:#5F7391}
.nav-search .kbd{
  font-size:11px;color:var(--muted);border:1px solid var(--line-soft);
  border-radius:6px;padding:1px 6px;background:rgba(255,255,255,.03);
}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line-soft);color:var(--text);font-size:16px}
.nav-toggle:hover{border-color:var(--cyan);color:var(--sky)}
/* ============ 8. Hero ============ */
.hero{
  position:relative;padding:150px 0 92px;overflow:hidden;
  background:linear-gradient(180deg,rgba(11,18,32,.86) 0%,rgba(11,18,32,.96) 60%,var(--bg-0) 100%),
             url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(760px 380px at 82% 12%,rgba(34,211,238,.16),transparent 70%);
}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:54px;align-items:center}
.hero-title{
  font-size:clamp(28px,4.1vw,44px);line-height:1.24;font-weight:800;
  color:var(--text-strong);letter-spacing:.005em;
}
.hero-title em{font-style:normal;color:var(--sky);background:linear-gradient(120deg,#22D3EE,#7DD3FC 60%,#3B82F6);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub{margin-top:20px;font-size:16.5px;line-height:1.9;color:var(--muted);max-width:600px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:24px;
  font-size:13.5px;color:var(--muted);
}
.hero-meta span{display:inline-flex;align-items:center;gap:7px}
.hero-meta i{color:var(--cyan);font-size:12px}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:26px}
/* 版本面板 */
.version-card{padding:24px;position:relative;overflow:hidden}
.version-card::before{
  content:"";position:absolute;top:-60px;right:-60px;width:180px;height:180px;
  background:radial-gradient(circle,rgba(34,211,238,.25),transparent 70%);pointer-events:none;
}
.version-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line-soft)}
.version-name{font-size:15px;font-weight:700;color:var(--text-strong)}
.version-name span{display:block;font-size:12.5px;font-weight:400;color:var(--muted);margin-top:3px}
.version-chip{
  font-size:12.5px;font-weight:700;color:#04121F;padding:5px 12px;border-radius:999px;
  background:linear-gradient(135deg,#22D3EE,#3B82F6);
}
.version-shot{
  margin-top:18px;border-radius:var(--radius-sm);overflow:hidden;position:relative;
  border:1px solid var(--line-soft);
}
.version-shot img{width:100%;aspect-ratio:16/9;object-fit:cover}
.version-shot::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,18,32,.06),rgba(11,18,32,.5))}
.version-list{margin-top:18px;display:grid;gap:10px}
.version-list li{display:flex;align-items:center;justify-content:space-between;gap:14px;font-size:14px;color:var(--muted)}
.version-list li b{color:var(--text-strong);font-weight:600}
.version-actions{margin-top:20px;display:grid;gap:10px}
.version-note{margin-top:14px;font-size:12.5px;color:#6E82A0;line-height:1.7}
/* ============ 9. 价值条 ============ */
.value-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.value-card{padding:22px;border-radius:var(--radius-md);transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease}
.value-card:hover{transform:translateY(-3px);border-color:rgba(34,211,238,.35);box-shadow:var(--shadow-lift)}
.value-icon{
  width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.26);color:var(--cyan);font-size:17px;
  margin-bottom:14px;
}
.value-card h3{font-size:16.5px;font-weight:700;color:var(--text-strong);margin-bottom:8px}
.value-card p{font-size:14.5px;color:var(--muted);line-height:1.8}
/* ============ 10. 截图轮播 ============ */
.shots{position:relative;margin-top:12px}
.shots-viewport{overflow:hidden;border-radius:var(--radius-lg);border:1px solid var(--line-soft);background:var(--glass)}
.shots-track{display:flex;transition:transform .5s cubic-bezier(.4,.1,.2,1)}
.shot{min-width:100%;display:grid;grid-template-columns:1.15fr .85fr;gap:0;align-items:stretch}
.shot-media{position:relative;min-height:320px}
.shot-media img{width:100%;height:100%;object-fit:cover;border-radius:0}
.shot-media::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,18,32,.05),rgba(11,18,32,.75))}
.shot-body{padding:34px 32px;display:flex;flex-direction:column;justify-content:center;gap:12px}
.shot-body h3{font-size:20px;font-weight:700;color:var(--text-strong)}
.shot-body p{font-size:15px;color:var(--muted);line-height:1.85}
.shot-points{display:grid;gap:9px;margin-top:6px}
.shot-points li{display:flex;align-items:flex-start;gap:9px;font-size:14px;color:var(--muted)}
.shot-points i{color:var(--cyan);font-size:12px;margin-top:6px}
.shots-nav{display:flex;align-items:center;justify-content:center;gap:18px;margin-top:24px}
.shots-arrow{
  width:42px;height:42px;border-radius:50%;border:1px solid var(--line-soft);
  background:var(--glass);color:var(--text);display:flex;align-items:center;justify-content:center;
  transition:all .2s ease;
}
.shots-arrow:hover{border-color:var(--cyan);color:var(--sky);background:rgba(34,211,238,.1)}
.shots-dots{display:flex;align-items:center;gap:9px}
.shots-dots button{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.18);transition:all .25s ease}
.shots-dots button.active{width:26px;border-radius:999px;background:linear-gradient(90deg,#22D3EE,#3B82F6)}
/* ============ 11. 系统要求 ============ */
.req-wrap{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.req-card{padding:24px;border-radius:var(--radius-md)}
.req-head{display:flex;align-items:center;gap:12px;padding-bottom:14px;border-bottom:1px solid var(--line-soft);margin-bottom:6px}
.req-head .req-ico{
  width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:rgba(125,211,252,.1);border:1px solid rgba(125,211,252,.24);color:var(--sky);font-size:16px;
}
.req-head h3{font-size:16.5px;font-weight:700;color:var(--text-strong)}
.req-head span{display:block;font-size:12.5px;color:var(--muted);font-weight:400;margin-top:2px}
.req-list{display:grid;gap:2px}
.req-list div{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:9px 0;font-size:14px;border-bottom:1px dashed rgba(255,255,255,.06)}
.req-list div:last-child{border-bottom:0}
.req-list dt{color:var(--muted);flex-shrink:0}
.req-list dd{color:var(--text);text-align:right;font-weight:500}
/* ============ 12. 评价墙 ============ */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review-card{padding:22px;border-radius:var(--radius-md);transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease}
.review-card:hover{transform:translateY(-3px);border-color:rgba(34,211,238,.3);box-shadow:var(--shadow-lift)}
.review-card--wide{grid-column:span 2}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.review-avatar{
  width:42px;height:42px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(34,211,238,.26),rgba(59,130,246,.26));
  border:1px solid rgba(34,211,238,.3);color:var(--sky);font-weight:700;font-size:15px;
}
.review-name{font-size:15px;font-weight:600;color:var(--text-strong)}
.review-name span{display:block;font-size:12.5px;color:var(--muted);font-weight:400;margin-top:2px}
.review-stars{margin-left:auto;color:var(--star);font-size:12.5px;letter-spacing:1px}
.review-card p{font-size:14.5px;color:var(--muted);line-height:1.85}
.review-foot{margin-top:14px;display:flex;align-items:center;gap:8px;font-size:12.5px;color:#6E82A0}
/* ============ 13. 最新动态（CMS） ============ */
.news-grid{margin-top:4px}
.news-card{
  height:100%;display:flex;flex-direction:column;overflow:hidden;
  border-radius:var(--radius-md);background:var(--glass);
  border:1px solid var(--line-soft);transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.news-card:hover{transform:translateY(-3px);border-color:rgba(34,211,238,.35);box-shadow:var(--shadow-lift)}
.news-thumb{display:block;position:relative;overflow:hidden}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0;transition:transform .4s ease}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(11,18,32,.7))}
.news-body{padding:20px;display:flex;flex-direction:column;gap:11px;flex:1}
.news-body h3{font-size:16.5px;font-weight:700;color:var(--text-strong);line-height:1.5}
.news-body h3 a:hover{color:var(--sky)}
.news-body p{font-size:14.5px;color:var(--muted);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:#6E82A0;padding-top:8px;border-top:1px solid rgba(255,255,255,.06)}
.news-more{display:inline-flex;align-items:center;gap:6px;color:var(--sky);font-weight:600;font-size:13.5px}
.news-more:hover{color:var(--cyan);gap:9px}
.empty-state{
  padding:54px 24px;text-align:center;border-radius:var(--radius-lg);
  border:1px dashed rgba(34,211,238,.28);background:var(--glass);
}
.empty-state i{font-size:30px;color:var(--cyan);opacity:.8}
.empty-state p{margin:16px 0 20px;color:var(--muted);font-size:15px}
/* ============ 14. 下载 CTA ============ */
.download-box{
  position:relative;overflow:hidden;padding:56px 40px;text-align:center;
  border-radius:20px;border:1px solid rgba(34,211,238,.24);
  background:linear-gradient(180deg,rgba(14,26,46,.96),rgba(11,18,32,.98)),
             url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
}
.download-box::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(600px 260px at 50% 0%,rgba(34,211,238,.18),transparent 70%);
}
.download-box > *{position:relative;z-index:2}
.download-box h2{font-size:clamp(23px,2.6vw,30px);font-weight:800;color:var(--text-strong)}
.download-box p{margin:16px auto 0;max-width:660px;color:var(--muted);font-size:15.5px;line-height:1.85}
.platform-row{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:28px}
.platform-btn{
  display:inline-flex;align-items:center;gap:9px;padding:11px 20px;border-radius:var(--radius-sm);
  background:var(--glass);border:1px solid var(--line-soft);color:var(--text);font-size:14px;font-weight:600;
  transition:all .2s ease;
}
.platform-btn:hover{border-color:var(--cyan);color:var(--sky);background:rgba(34,211,238,.08);transform:translateY(-2px)}
.platform-btn i{font-size:16px}
.download-foot{margin-top:22px;font-size:13px;color:#6E82A0;display:flex;flex-wrap:wrap;justify-content:center;gap:8px 20px}
.download-foot a{color:var(--sky)}
.download-foot a:hover{color:var(--cyan)}
/* ============ 15. FAQ ============ */
.faq-list{max-width:900px;margin:0 auto;display:grid;gap:12px}
.faq-item{
  border-radius:var(--radius-md);border:1px solid var(--line-soft);background:var(--glass);
  border-left:2px solid transparent;overflow:hidden;transition:border-color .22s ease,background-color .22s ease;
}
.faq-item.is-open{border-left-color:var(--cyan);background:rgba(34,211,238,.05)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 22px;min-height:56px;text-align:left;font-size:15.5px;font-weight:600;color:var(--text-strong);
}
.faq-q:hover{color:var(--sky)}
.faq-icon{
  width:26px;height:26px;border-radius:8px;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.24);color:var(--cyan);font-size:12px;
  transition:transform .25s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a p{padding:0 22px 20px;font-size:14.5px;color:var(--muted);line-height:1.9}
/* ============ 16. 页脚 ============ */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:38px}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:10px;font-size:16px}
.footer-brand span{font-size:16px;font-weight:700;color:var(--text-strong)}
.footer-text{font-size:14px;color:var(--muted);line-height:1.9;max-width:340px}
.footer-col h4{font-size:14.5px;font-weight:700;color:var(--text-strong);margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--muted);display:inline-block}
.footer-col a:hover{color:var(--cyan);transform:translateX(2px)}
.footer-contact li{font-size:14px;color:var(--muted);display:flex;align-items:center;gap:9px}
.footer-contact i{color:var(--cyan);font-size:13px;width:16px}
.footer-bottom{
  margin-top:48px;padding:22px 0;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:#6E82A0;
}
.footer-bottom a{color:#8CA0BC}
.footer-bottom a:hover{color:var(--cyan)}
/* ============ 17. 响应式 ============ */
@media screen and (max-width:1199px){
  .hero-grid{gap:38px}
  .nav-search input{width:120px}
}
@media screen and (max-width:991px){
  :root{--sec-pad:72px}
  .nav-search{display:none}
  .hero{padding:128px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .value-grid{grid-template-columns:repeat(2,1fr)}
  .shot{grid-template-columns:1fr}
  .shot-media{min-height:230px}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .review-card--wide{grid-column:span 2}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media screen and (max-width:767px){
  :root{--sec-pad:56px}
  body{font-size:15.5px}
  .nav-toggle{display:flex}
  .nav-links{
    position:absolute;top:calc(100% + 10px);left:16px;right:16px;
    flex-direction:column;align-items:stretch;gap:6px;padding:14px;
    background:rgba(11,18,32,.98);border:1px solid var(--line);
    border-radius:var(--radius-md);box-shadow:var(--shadow-lift);
    backdrop-filter:blur(12px);display:none;
  }
  .nav-links.is-open{display:flex}
  .nav-links a{padding:12px 14px;font-size:15px}
  .nav-right .btn-primary{display:none}
  .brand-text{font-size:15px}
  .hero{padding:112px 0 60px}
  .hero-actions{gap:10px}
  .hero-actions .btn{width:100%}
  .value-grid{grid-template-columns:1fr}
  .req-wrap{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .review-card--wide{grid-column:span 1}
  .download-box{padding:40px 22px}
  .platform-btn{width:100%;justify-content:center}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .req-list div{flex-direction:column;align-items:flex-start;gap:2px}
  .req-list dd{text-align:left}
}
@media screen and (max-width:520px){
  .hero-title{font-size:26px}
  .sec-head{margin-bottom:32px}
  .shot-body{padding:24px 20px}
  .faq-q{padding:15px 16px;font-size:15px}
  .faq-a p{padding:0 16px 18px}
  .version-card{padding:18px}
  .news-body{padding:16px}
}

/* roulang page: article */
:root{
  --bg:#0B1220;
  --bg-2:#0E1A2E;
  --line:#1E3A5F;
  --accent:#22D3EE;
  --accent-2:#7DD3FC;
  --warm:#FACC15;
  --text:#E8F1FA;
  --muted:#93A7BF;
  --glass:rgba(255,255,255,.05);
  --glass-line:rgba(255,255,255,.08);
  --radius-lg:16px;
  --radius:12px;
  --shadow:0 8px 30px rgba(0,0,0,.35);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(900px 500px at 12% -8%, rgba(34,211,238,.10), transparent 60%),
    radial-gradient(700px 420px at 92% 4%, rgba(59,130,246,.12), transparent 62%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;border-radius:var(--radius)}
a{color:var(--accent-2);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--accent)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;color:#F4F9FF}
p{margin:0 0 1em}
button,input{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;position:relative;z-index:1}
.show-for-sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(11,18,32,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-stuck{
  background:rgba(11,18,32,.94);
  border-bottom-color:var(--line);
  box-shadow:0 10px 30px rgba(0,0,0,.4);
}
.nav-wrap{display:flex;align-items:center;gap:22px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;color:var(--text)}
.brand:hover{color:#fff}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  display:grid;place-items:center;
  font-weight:800;font-size:17px;color:#04121F;
  background:linear-gradient(135deg,#22D3EE,#3B82F6);
  box-shadow:0 6px 18px rgba(34,211,238,.28);
}
.brand-text{display:flex;flex-direction:column;font-weight:700;font-size:16px;letter-spacing:.01em;line-height:1.25}
.brand-text small{font-size:11.5px;font-weight:400;color:var(--muted);letter-spacing:.02em}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:6px}
.nav-links a{
  padding:9px 14px;border-radius:10px;font-size:14.5px;color:#C2D4E8;white-space:nowrap;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease;
}
.nav-links a:hover{background:rgba(34,211,238,.08);color:#fff}
.nav-links a.active{color:#fff;background:rgba(34,211,238,.12);box-shadow:inset 0 0 0 1px rgba(34,211,238,.3)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{
  display:flex;align-items:center;gap:8px;min-width:220px;
  background:rgba(255,255,255,.05);border:1px solid var(--glass-line);
  border-radius:10px;padding:7px 10px;transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search:focus-within{border-color:rgba(34,211,238,.6);box-shadow:0 0 0 3px rgba(34,211,238,.12)}
.nav-search i{color:var(--accent-2);font-size:13px}
.nav-search input{
  width:100%;background:transparent;border:0;outline:none;color:var(--text);font-size:13.5px;
}
.nav-search input::placeholder{color:#7A90AA}
.kbd{font-size:11px;color:#8AA2BC;border:1px solid var(--glass-line);border-radius:6px;padding:1px 5px;white-space:nowrap}
.nav-toggle{
  display:none;width:42px;height:40px;border-radius:10px;cursor:pointer;
  background:rgba(255,255,255,.05);border:1px solid var(--glass-line);color:var(--text);font-size:16px;
}
.nav-toggle:hover{border-color:rgba(34,211,238,.5);color:#fff}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:12px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;text-decoration:none;line-height:1.2;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:linear-gradient(135deg,#22D3EE,#3B82F6);color:#04121F}
.btn-primary:hover{color:#04121F;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(34,211,238,.5),0 10px 30px rgba(34,211,238,.25)}
.btn-ghost{background:rgba(255,255,255,.04);border-color:rgba(34,211,238,.4);color:var(--accent-2)}
.btn-ghost:hover{background:rgba(34,211,238,.08);color:#fff;transform:translateY(-2px)}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:10px}
.btn-block{width:100%}

/* ---------- badges & tags ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;font-size:12.5px;font-weight:600;
  background:rgba(34,211,238,.12);color:var(--accent-2);
  border:1px solid rgba(34,211,238,.28);
}
.badge-muted{background:rgba(255,255,255,.05);color:#B7C9DD;border-color:var(--glass-line)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 13px;border-radius:999px;font-size:13px;color:#C7D9EC;
  background:rgba(255,255,255,.04);border:1px solid var(--glass-line);
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.tag:hover{color:#fff;border-color:rgba(34,211,238,.45);transform:translateY(-2px)}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;
  padding:44px 0 46px;
  background-image:linear-gradient(180deg,rgba(9,15,26,.82),rgba(11,18,32,.94)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13.5px;color:var(--muted);margin-bottom:20px}
.crumbs a{color:#B7C9DD}
.crumbs a:hover{color:var(--accent)}
.crumbs .sep{color:#4C6480}
.crumbs .current{color:#93A7BF;max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-hero h1{
  font-size:clamp(26px,3.9vw,40px);
  font-weight:800;letter-spacing:.005em;margin:14px 0 18px;max-width:20ch;
}
.article-hero .lead{color:#B7C9DD;font-size:16.5px;max-width:76ch;margin-bottom:22px}
.meta-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:13.5px;color:var(--muted)}
.meta-bar span{display:inline-flex;align-items:center;gap:7px}
.meta-bar i{color:var(--accent-2)}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:28px;
}
.stat{
  background:var(--glass);border:1px solid var(--glass-line);border-radius:var(--radius);
  padding:14px 16px;backdrop-filter:blur(12px);
}
.stat b{display:block;font-size:19px;color:#fff;font-weight:700;letter-spacing:.01em}
.stat span{font-size:12.5px;color:var(--muted)}

/* ---------- sections ---------- */
.section{padding:76px 0}
.section-sm{padding:52px 0}
.section-head{max-width:760px;margin-bottom:34px}
.section-head h2{font-size:clamp(21px,2.4vw,28px);margin-bottom:12px}
.section-head p{color:var(--muted);font-size:15.5px;margin:0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.12em;color:var(--accent-2);
  text-transform:uppercase;margin-bottom:12px;font-weight:600;
}
.eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--accent),transparent)}

/* ---------- article body ---------- */
.article-shell{
  max-width:850px;margin:0 auto;
  background:var(--glass);border:1px solid var(--glass-line);
  border-radius:var(--radius-lg);backdrop-filter:blur(12px);
  box-shadow:var(--shadow);
  padding:44px 46px 52px;
}
.article-body{font-size:17.5px;line-height:1.85;color:#D8E6F4}
.article-body > *:first-child{margin-top:0}
.article-body h2{
  font-size:26px;margin:2.1em 0 .8em;padding-left:16px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--accent),#3B82F6);
}
.article-body h3{font-size:20.5px;margin:1.9em 0 .7em;color:#EDF6FF}
.article-body h4{font-size:18px;margin:1.6em 0 .6em;color:#EDF6FF}
.article-body p{margin:0 0 1.25em}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:2px}
.article-body ul li,.article-body ol li{
  position:relative;padding-left:24px;margin-bottom:.6em;color:#CBDCEC;
}
.article-body ul li::before{
  content:"";position:absolute;left:4px;top:.72em;width:7px;height:7px;border-radius:2px;
  background:var(--accent);box-shadow:0 0 10px rgba(34,211,238,.55);
}
.article-body ol{counter-reset:item}
.article-body ol li{counter-increment:item;padding-left:34px}
.article-body ol li::before{
  content:counter(item);
  position:absolute;left:0;top:.18em;width:22px;height:22px;border-radius:7px;
  display:grid;place-items:center;font-size:12.5px;font-weight:700;color:#04121F;
  background:linear-gradient(135deg,#22D3EE,#3B82F6);
}
.article-body blockquote{
  margin:1.8em 0;padding:20px 24px;
  border-left:3px solid var(--accent);
  background:rgba(34,211,238,.06);
  border-radius:0 var(--radius) var(--radius) 0;
  color:#C7DBEE;font-size:16.5px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius);border:1px solid var(--glass-line);margin:1.6em 0}
.article-body a{color:var(--accent);border-bottom:1px solid rgba(34,211,238,.35)}
.article-body a:hover{color:#fff;border-bottom-color:#fff}
.article-body code{
  background:rgba(255,255,255,.07);border:1px solid var(--glass-line);
  border-radius:6px;padding:2px 7px;font-size:14.5px;color:#9FE9F7;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body pre{
  background:rgba(4,18,31,.85);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;overflow:auto;margin:1.6em 0;
}
.article-body pre code{background:none;border:0;padding:0;color:#BEE7F5;font-size:14px}
.article-body table{
  width:100%;border-collapse:separate;border-spacing:0;margin:1.8em 0;
  background:rgba(255,255,255,.035);border:1px solid var(--glass-line);
  border-radius:var(--radius);overflow:hidden;font-size:15.5px;
}
.article-body thead th{
  background:rgba(34,211,238,.1);color:#EAF7FF;font-weight:700;text-align:left;
  padding:13px 16px;font-size:14.5px;
}
.article-body td{padding:13px 16px;border-top:1px solid rgba(255,255,255,.07);color:#CBDCEC}
.article-body tr:last-child td{border-bottom:0}
.article-body hr{border:0;height:1px;background:var(--line);margin:2.2em 0}

/* ---------- empty state ---------- */
.empty-state{
  text-align:center;padding:60px 26px;
  background:var(--glass);border:1px dashed rgba(34,211,238,.35);border-radius:var(--radius-lg);
  max-width:850px;margin:0 auto;
}
.empty-state i{font-size:34px;color:var(--accent-2);margin-bottom:16px;display:block}
.empty-state h2{font-size:22px;margin-bottom:10px}
.empty-state p{color:var(--muted);margin-bottom:22px}

/* ---------- article footer block ---------- */
.article-foot{max-width:850px;margin:26px auto 0}
.article-foot .foot-card{
  background:var(--glass);border:1px solid var(--glass-line);border-radius:var(--radius-lg);
  padding:24px 26px;backdrop-filter:blur(12px);
}
.article-foot h4{font-size:15px;color:#EDF6FF;margin-bottom:14px;letter-spacing:.02em}
.article-foot .foot-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}

/* ---------- download strip ---------- */
.download-strip{
  background:linear-gradient(140deg,rgba(34,211,238,.10),rgba(59,130,246,.06));
  border:1px solid rgba(34,211,238,.24);border-radius:var(--radius-lg);
  padding:30px 32px;display:grid;grid-template-columns:1.4fr 1fr;gap:26px;align-items:center;
}
.download-strip h3{font-size:22px;margin-bottom:10px}
.download-strip p{color:#B7C9DD;margin:0;font-size:15px}
.download-strip .strip-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}
.file-facts{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:16px;font-size:13px;color:var(--muted)}
.file-facts span{display:inline-flex;align-items:center;gap:7px}
.file-facts i{color:var(--accent-2)}

/* ---------- related cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.card{
  background:var(--glass);border:1px solid var(--glass-line);border-radius:var(--radius-lg);
  overflow:hidden;backdrop-filter:blur(12px);box-shadow:var(--shadow);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-3px);border-color:rgba(34,211,238,.32);box-shadow:0 14px 40px rgba(0,0,0,.42)}
.card-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.card-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0}
.card-thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,18,32,.05),rgba(11,18,32,.6));
}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17.5px;line-height:1.45}
.card-body p{color:var(--muted);font-size:14.5px;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;align-items:center;gap:12px;font-size:12.5px;color:#8AA2BC;margin-top:auto}
.card-link{font-size:14px;font-weight:600;color:var(--accent-2);display:inline-flex;align-items:center;gap:6px}
.card-link:hover{color:#fff}

/* ---------- faq ---------- */
.faq-wrap{max-width:900px}
.faq-item{
  background:rgba(255,255,255,.04);border:1px solid var(--glass-line);
  border-radius:var(--radius);margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease,background .2s ease;
}
.faq-item[open]{border-color:rgba(34,211,238,.35);background:rgba(34,211,238,.05)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;min-height:56px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  font-size:16px;font-weight:600;color:#EDF6FF;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:20px;font-weight:400;color:var(--accent-2);line-height:1;
  transition:transform .2s ease,color .2s ease;
}
.faq-item[open] summary::after{content:"−";color:#fff}
.faq-item[open] summary{box-shadow:inset 2px 0 0 var(--accent)}
.faq-a{padding:0 22px 20px;color:var(--muted);font-size:15px;line-height:1.8}

/* ---------- cta ---------- */
.cta-panel{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  border:1px solid rgba(34,211,238,.25);
  background-image:linear-gradient(120deg,rgba(9,15,26,.9),rgba(14,26,46,.86)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  padding:52px 44px;text-align:center;
}
.cta-panel h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:14px}
.cta-panel p{color:#B7C9DD;max-width:70ch;margin:0 auto 26px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* ---------- footer ---------- */
.site-footer{background:#080E1A;border-top:1px solid var(--line);padding:64px 0 0;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:34px}
.footer-brand{display:flex;align-items:center;gap:11px;font-weight:700;font-size:16px;color:#F2F8FF;margin-bottom:16px}
.footer-text{color:var(--muted);font-size:14px;line-height:1.8;margin:0;max-width:42ch}
.footer-col h4{font-size:14.5px;color:#EAF3FC;margin-bottom:16px;letter-spacing:.03em}
.footer-col ul li{margin-bottom:11px}
.footer-col ul a{color:#A9BDD3;font-size:14px;display:inline-block;transition:color .2s ease,transform .2s ease}
.footer-col ul a:hover{color:var(--accent);transform:translateX(2px)}
.footer-contact li{display:flex;gap:10px;color:#A9BDD3;font-size:13.5px;line-height:1.6}
.footer-contact i{color:var(--accent-2);margin-top:4px}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(30,58,95,.7);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:10px 22px;
  justify-content:space-between;font-size:13px;color:#7C90A8;
}

/* ---------- responsive ---------- */
@media screen and (max-width:1080px){
  .nav-search{min-width:170px}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .download-strip{grid-template-columns:1fr}
  .download-strip .strip-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media screen and (max-width:900px){
  .nav-toggle{display:inline-grid;place-items:center}
  .nav-search{display:none}
  .nav-links{
    position:absolute;left:20px;right:20px;top:calc(100% + 10px);
    flex-direction:column;align-items:stretch;gap:4px;margin:0;
    background:rgba(11,18,32,.97);border:1px solid var(--line);border-radius:var(--radius-lg);
    padding:12px;box-shadow:var(--shadow);
    backdrop-filter:blur(14px);
    display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 14px}
  .grid-3{grid-template-columns:1fr 1fr}
  .article-shell{padding:32px 26px 40px}
  .article-body{font-size:16.5px}
}
@media screen and (max-width:640px){
  .nav-wrap{min-height:66px;gap:12px}
  .brand-text{font-size:15px}
  .brand-text small{display:none}
  .section{padding:56px 0}
  .section-sm{padding:42px 0}
  .article-hero{padding:34px 0 36px}
  .article-hero h1{max-width:none}
  .hero-stats{grid-template-columns:1fr 1fr;gap:10px}
  .grid-3{grid-template-columns:1fr}
  .article-shell{padding:24px 18px 32px;border-radius:var(--radius)}
  .article-body{font-size:16.5px;line-height:1.8}
  .article-body h2{font-size:21.5px}
  .article-body h3{font-size:18.5px}
  .article-foot .foot-card{padding:20px 18px}
  .cta-panel{padding:36px 20px}
  .btn{width:100%}
  .cta-actions .btn,.strip-actions .btn,.foot-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .download-strip{padding:24px 20px}
}

/* roulang page: category1 */
:root{
  --bg:#0B1220;
  --bg-2:#0E1A2E;
  --bg-3:#132340;
  --line:#1E3A5F;
  --line-soft:rgba(255,255,255,.08);
  --cyan:#22D3EE;
  --cyan-2:#7DD3FC;
  --blue:#3B82F6;
  --amber:#FACC15;
  --text:#E8EFFA;
  --muted:#96A8C4;
  --muted-2:#6E819C;
  --glass:rgba(255,255,255,.05);
  --glass-2:rgba(255,255,255,.08);
  --radius-lg:18px;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 8px 30px rgba(0,0,0,.35);
  --shadow-lg:0 22px 55px rgba(0,0,0,.5);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(900px 520px at 12% -6%,rgba(34,211,238,.10),transparent 60%),
    radial-gradient(760px 460px at 92% 4%,rgba(59,130,246,.12),transparent 62%);
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease,transform .2s ease}
p{margin:0 0 14px}
h1,h2,h3,h4{margin:0 0 16px;font-weight:800;line-height:1.3;letter-spacing:.2px}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font-family:inherit}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;position:relative;z-index:1}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:12px;font-size:15px;font-weight:700;
  border:1px solid transparent;transition:.25s ease;white-space:nowrap;
}
.btn i{font-size:14px}
.btn-primary{
  background:linear-gradient(135deg,#22D3EE,#3B82F6);
  color:#04121F;
  box-shadow:0 6px 22px rgba(34,211,238,.22);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(34,211,238,.5),0 12px 32px rgba(34,211,238,.3);
  filter:brightness(1.06);
}
.btn-ghost{
  background:var(--glass);
  border-color:rgba(34,211,238,.35);
  color:var(--cyan-2);
}
.btn-ghost:hover{
  background:rgba(34,211,238,.1);
  border-color:rgba(34,211,238,.6);
  transform:translateY(-2px);
}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:10px}
.btn-lg{padding:16px 34px;font-size:16px;border-radius:14px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(11,18,32,.78);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.scrolled{
  background:rgba(11,18,32,.95);
  border-bottom-color:var(--line);
  box-shadow:0 12px 34px rgba(0,0,0,.4);
}
.nav-wrap{display:flex;align-items:center;gap:22px;min-height:74px}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#22D3EE,#3B82F6);
  color:#04121F;font-weight:800;font-size:17px;
  box-shadow:0 6px 18px rgba(34,211,238,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;font-size:16px;font-weight:800;letter-spacing:.3px}
.brand-text small{font-size:11px;font-weight:500;color:var(--muted-2);letter-spacing:.4px;margin-top:2px}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-links a{
  padding:9px 15px;border-radius:10px;font-size:14.5px;color:var(--muted);
  border:1px solid transparent;white-space:nowrap;
}
.nav-links a:hover{color:var(--text);background:var(--glass);border-color:var(--line-soft)}
.nav-links a.active{
  color:var(--cyan-2);background:rgba(34,211,238,.1);
  border-color:rgba(34,211,238,.28);
}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-search{
  display:flex;align-items:center;gap:9px;
  width:250px;padding:9px 12px;border-radius:10px;
  background:var(--glass);border:1px solid var(--line-soft);
  transition:.22s ease;
}
.nav-search i{color:var(--muted-2);font-size:13px}
.nav-search input{
  flex:1;background:transparent;border:0;color:var(--text);font-size:13.5px;outline:none;min-width:0;
}
.nav-search input::placeholder{color:var(--muted-2)}
.nav-search:focus-within{border-color:rgba(34,211,238,.6);box-shadow:0 0 0 3px rgba(34,211,238,.14)}
.nav-search .kbd{
  font-size:11px;color:var(--muted-2);border:1px solid var(--line-soft);
  border-radius:6px;padding:1px 6px;background:rgba(255,255,255,.03);
}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:11px;
  background:var(--glass);border:1px solid var(--line-soft);color:var(--text);
}

/* ============ 页面 Hero ============ */
.page-hero{position:relative;overflow:hidden;padding:66px 0 62px}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.3;
}
.page-hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,18,32,.6) 0%,rgba(11,18,32,.9) 58%,#0B1220 100%);
}
.page-hero-inner{position:relative;z-index:2;max-width:920px}
.breadcrumb{display:flex;align-items:center;gap:9px;font-size:13.5px;color:var(--muted-2);margin-bottom:22px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .cur{color:var(--cyan-2)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:1.6px;font-weight:700;color:var(--cyan-2);
  padding:6px 14px;border-radius:999px;margin-bottom:18px;
  background:rgba(34,211,238,.09);border:1px solid rgba(34,211,238,.26);
}
.page-hero h1{font-size:clamp(28px,4.2vw,46px);margin-bottom:18px}
.page-hero .lead{font-size:17px;color:var(--muted);max-width:760px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.fact-strip{display:flex;flex-wrap:wrap;gap:10px}
.fact-strip li{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);
  padding:7px 14px;border-radius:999px;
  background:var(--glass);border:1px solid var(--line-soft);
}
.fact-strip li i{color:var(--cyan);font-size:12px}

/* ============ 快速索引 ============ */
.anchor-index{padding:0 0 8px}
.anchor-grid{
  display:grid;grid-template-columns:repeat(5,1fr);gap:14px;
  padding:20px;border-radius:var(--radius-lg);
  background:var(--glass);border:1px solid var(--line-soft);
  box-shadow:var(--shadow);
}
.anchor-item{
  display:flex;flex-direction:column;gap:6px;
  padding:14px 16px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.03);border:1px solid transparent;transition:.22s ease;
}
.anchor-item:hover{
  background:rgba(34,211,238,.08);border-color:rgba(34,211,238,.32);transform:translateY(-2px);
}
.anchor-item span{font-size:11.5px;letter-spacing:1.2px;color:var(--muted-2);font-weight:700}
.anchor-item strong{font-size:14.5px;color:var(--text);font-weight:700}
.anchor-item em{font-style:normal;font-size:12.5px;color:var(--muted-2)}

/* ============ 通用板块 ============ */
.section{padding:92px 0;position:relative}
.section-alt{background:linear-gradient(180deg,rgba(14,26,46,.72),rgba(11,18,32,0))}
.section-head{max-width:780px;margin-bottom:44px}
.section-tag{
  display:inline-block;font-size:12px;letter-spacing:1.8px;font-weight:800;
  color:var(--cyan-2);margin-bottom:12px;
  padding:5px 12px;border-radius:6px;
  background:rgba(34,211,238,.08);border-left:2px solid var(--cyan);
}
.section-head h2{font-size:clamp(23px,2.6vw,31px);margin-bottom:12px}
.section-head p{color:var(--muted);font-size:15.5px;margin:0}

/* ============ 条目卡片列表 ============ */
.entry-list{display:flex;flex-direction:column;gap:20px}
.entry-card{
  display:grid;grid-template-columns:230px 1fr;gap:24px;
  padding:20px;border-radius:var(--radius-lg);
  background:var(--glass);border:1px solid var(--line-soft);
  transition:.26s ease;
}
.entry-card:hover{
  transform:translateY(-3px);
  border-color:rgba(34,211,238,.34);
  box-shadow:var(--shadow-lg);
}
.entry-card img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--radius);border:1px solid var(--line-soft);
}
.entry-body{display:flex;flex-direction:column;justify-content:center}
.entry-body h3{font-size:19px;margin-bottom:10px}
.entry-body p{color:var(--muted);font-size:15px;margin-bottom:14px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  font-size:12px;color:var(--cyan-2);padding:4px 11px;border-radius:999px;
  background:rgba(34,211,238,.08);border:1px solid rgba(34,211,238,.22);
}
.tag-muted{color:var(--muted);background:rgba(255,255,255,.04);border-color:var(--line-soft)}

/* ============ 版本数据面板 ============ */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:26px}
.stat-card{
  padding:22px 20px;border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.03));
  border:1px solid var(--line-soft);
  transition:.25s ease;
}
.stat-card:hover{border-color:rgba(34,211,238,.35);transform:translateY(-2px)}
.stat-label{display:block;font-size:12.5px;color:var(--muted-2);letter-spacing:.6px;margin-bottom:8px}
.stat-value{display:block;font-size:26px;font-weight:800;color:var(--text);letter-spacing:.5px}
.stat-value.accent{
  background:linear-gradient(135deg,#22D3EE,#7DD3FC);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat-note{display:block;font-size:12.5px;color:var(--muted-2);margin-top:8px}

.timeline{
  border-radius:var(--radius-lg);overflow:hidden;
  background:var(--glass);border:1px solid var(--line-soft);
}
.timeline-head{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 24px;border-bottom:1px solid var(--line-soft);
  background:rgba(255,255,255,.03);
}
.timeline-head h3{margin:0;font-size:16px}
.timeline-head span{font-size:12.5px;color:var(--muted-2)}
.timeline-list li{
  display:grid;grid-template-columns:110px 120px 1fr;gap:18px;align-items:center;
  padding:18px 24px;border-bottom:1px solid rgba(255,255,255,.05);
  transition:.2s ease;
}
.timeline-list li:last-child{border-bottom:0}
.timeline-list li:hover{background:rgba(34,211,238,.05)}
.tl-ver{font-weight:800;color:var(--cyan-2);font-size:15px}
.tl-date{font-size:13px;color:var(--muted-2)}
.tl-desc{font-size:14.5px;color:var(--muted)}
.tl-badge{
  display:inline-block;font-size:11px;font-weight:700;padding:2px 9px;border-radius:999px;
  background:linear-gradient(135deg,#22D3EE,#3B82F6);color:#04121F;margin-left:8px;vertical-align:middle;
}

/* ============ 步骤 ============ */
.steps{display:grid;gap:16px;counter-reset:step}
.step{
  display:grid;grid-template-columns:64px 1fr;gap:20px;align-items:flex-start;
  padding:22px 24px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line-soft);
  transition:.25s ease;
}
.step:hover{border-color:rgba(34,211,238,.32);background:rgba(34,211,238,.05)}
.step-no{
  width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:16px;color:var(--cyan-2);
  background:rgba(34,211,238,.09);border:1px solid rgba(34,211,238,.3);
}
.step h3{font-size:17px;margin-bottom:8px}
.step p{color:var(--muted);font-size:14.5px;margin:0}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:920px}
.faq-item{
  border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line-soft);
  overflow:hidden;transition:.24s ease;
}
.faq-item:hover{border-color:rgba(34,211,238,.24)}
.faq-item.open{border-color:rgba(34,211,238,.42);border-left:2px solid var(--cyan);background:rgba(34,211,238,.05)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 22px;font-size:15.5px;font-weight:700;text-align:left;color:var(--text);
  min-height:56px;
}
.faq-icon{
  position:relative;width:20px;height:20px;flex:0 0 auto;border-radius:50%;
  border:1px solid rgba(34,211,238,.45);transition:.25s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--cyan);
  transform:translate(-50%,-50%);border-radius:2px;
}
.faq-icon::before{width:9px;height:1.6px}
.faq-icon::after{width:1.6px;height:9px;transition:.25s ease}
.faq-item.open .faq-icon{transform:rotate(180deg);background:rgba(34,211,238,.14)}
.faq-item.open .faq-icon::after{height:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a p{padding:0 22px 20px;color:var(--muted);font-size:14.8px;margin:0}

/* ============ CTA 下载 ============ */
.cta-block{
  position:relative;overflow:hidden;
  border-radius:22px;padding:56px 42px;text-align:center;
  background:linear-gradient(150deg,rgba(34,211,238,.13),rgba(59,130,246,.1));
  border:1px solid rgba(34,211,238,.26);
  box-shadow:var(--shadow-lg);
}
.cta-block::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.14;
}
.cta-inner{position:relative;z-index:2;max-width:720px;margin:0 auto}
.cta-block h2{font-size:clamp(23px,3vw,32px);margin-bottom:14px}
.cta-block p{color:var(--muted);font-size:15.5px;margin-bottom:28px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-bottom:22px}
.platform-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.platform-row a{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);
  padding:9px 16px;border-radius:999px;
  background:rgba(255,255,255,.05);border:1px solid var(--line-soft);
}
.platform-row a:hover{color:var(--cyan-2);border-color:rgba(34,211,238,.4);background:rgba(34,211,238,.08)}

/* ============ 相关分类 ============ */
.rel-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.rel-card{
  display:block;padding:26px;border-radius:var(--radius-lg);
  background:var(--glass);border:1px solid var(--line-soft);transition:.26s ease;
}
.rel-card:hover{transform:translateY(-3px);border-color:rgba(34,211,238,.35);box-shadow:var(--shadow-lg)}
.rel-card i{font-size:20px;color:var(--cyan);margin-bottom:14px;display:block}
.rel-card h3{font-size:18px;margin-bottom:10px}
.rel-card p{color:var(--muted);font-size:14.5px;margin:0}
.rel-card span{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:13.5px;color:var(--cyan-2)}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:20px;background:#080E1A;
  border-top:1px solid var(--line);padding-top:64px;
  position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:38px}
.footer-brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:16px;margin-bottom:16px}
.footer-text{color:var(--muted-2);font-size:13.8px;line-height:1.85;margin:0}
.footer-col h4{font-size:14px;color:var(--text);margin-bottom:18px;letter-spacing:.6px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:13.8px;color:var(--muted-2);display:inline-block}
.footer-col a:hover{color:var(--cyan);transform:translateX(2px)}
.footer-contact li{display:flex;gap:10px;font-size:13.5px;color:var(--muted-2);line-height:1.7}
.footer-contact i{color:var(--cyan);font-size:12px;margin-top:5px}
.footer-bottom{
  margin-top:52px;padding:22px 0;border-top:1px solid rgba(255,255,255,.06);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--muted-2);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .anchor-grid{grid-template-columns:repeat(3,1fr)}
  .nav-search{width:210px}
}
@media (max-width:991px){
  .nav-toggle{display:flex;align-items:center;justify-content:center}
  .nav-links{
    position:absolute;top:74px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:6px;
    margin:0;padding:16px 20px 22px;
    background:rgba(10,17,30,.98);
    border-bottom:1px solid var(--line);
    box-shadow:0 24px 40px rgba(0,0,0,.5);
    display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 14px;font-size:15px}
  .nav-search{width:190px}
  .nav-right .btn-primary{display:none}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:72px 0}
}
@media (max-width:767px){
  .page-hero{padding:44px 0 44px}
  .page-hero .lead{font-size:15.5px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .anchor-grid{grid-template-columns:1fr 1fr;padding:16px}
  .entry-card{grid-template-columns:1fr}
  .entry-card img{aspect-ratio:16/9}
  .timeline-list li{grid-template-columns:1fr;gap:6px;padding:16px 18px}
  .step{grid-template-columns:1fr;gap:14px;padding:20px}
  .rel-grid{grid-template-columns:1fr}
  .cta-block{padding:38px 22px}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
  .nav-search{display:none}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
}
@media (max-width:520px){
  .anchor-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr}
  .brand-text small{display:none}
  .brand-text{font-size:15px}
}

/* roulang page: category2 */
:root{
  --bg:#0B1220;
  --bg-2:#0E1A2E;
  --bg-3:#0A1526;
  --surface:rgba(255,255,255,.055);
  --surface-2:rgba(255,255,255,.035);
  --border:rgba(255,255,255,.08);
  --border-strong:#1E3A5F;
  --accent:#22D3EE;
  --accent-2:#7DD3FC;
  --accent-deep:#3B82F6;
  --warn:#FACC15;
  --text:#E8F1FA;
  --muted:#93A7BE;
  --radius-lg:16px;
  --radius:12px;
  --radius-sm:10px;
  --shadow:0 8px 30px rgba(0,0,0,.35);
  --shadow-soft:0 4px 18px rgba(0,0,0,.25);
  --container:1200px;
  --header-h:72px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 12% -8%, rgba(34,211,238,.10), transparent 60%),
    radial-gradient(900px 520px at 92% 4%, rgba(59,130,246,.12), transparent 62%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--accent-2);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--accent);}
h1,h2,h3,h4,h5{margin:0 0 .5em;font-weight:800;line-height:1.28;color:#F2F8FF;letter-spacing:.2px;}
p{margin:0 0 1em;}
ul,ol{margin:0 0 1em;padding-left:1.15em;}
li{margin-bottom:.4em;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{font-size:clamp(22px,2.6vw,30px);}
.section-head p{color:var(--muted);margin:0;font-size:15.5px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.6px;color:var(--accent);
  background:rgba(34,211,238,.09);
  border:1px solid rgba(34,211,238,.28);
  padding:5px 12px;border-radius:999px;margin-bottom:16px;
}
.text-muted{color:var(--muted);}
.divider{height:1px;background:linear-gradient(90deg,transparent,var(--border-strong),transparent);margin:0;border:0;}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(11,18,32,.72);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.scrolled{
  background:rgba(10,18,32,.92);
  border-bottom-color:var(--border);
  box-shadow:0 10px 30px rgba(0,0,0,.35);
}
.nav-wrap{
  height:var(--header-h);
  display:flex;align-items:center;gap:24px;
}
.brand{display:flex;align-items:center;gap:11px;color:var(--text);flex-shrink:0;}
.brand:hover{color:var(--text);}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  display:grid;place-items:center;
  font-weight:800;font-size:17px;color:#04121F;
  background:linear-gradient(135deg,var(--accent),var(--accent-deep));
  box-shadow:0 6px 18px rgba(34,211,238,.28);
}
.brand-text{display:flex;flex-direction:column;font-weight:800;font-size:16px;letter-spacing:.3px;line-height:1.15;}
.brand-text small{font-weight:400;font-size:11.5px;color:var(--muted);letter-spacing:.4px;margin-top:3px;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-links a{
  position:relative;
  padding:9px 13px;border-radius:var(--radius-sm);
  font-size:14.5px;color:#C6D6E8;
  transition:color .18s ease,background .18s ease;
}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.05);}
.nav-links a.active{color:var(--accent);background:rgba(34,211,238,.10);}
.nav-link-cta{}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;}
.nav-search{
  display:flex;align-items:center;gap:9px;
  background:var(--surface-2);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:0 10px;height:40px;min-width:236px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search:focus-within{border-color:rgba(34,211,238,.55);box-shadow:0 0 0 3px rgba(34,211,238,.12);}
.nav-search i{color:var(--muted);font-size:13px;}
.nav-search input{
  flex:1;background:transparent;border:0;outline:none;
  color:var(--text);font-size:14px;height:100%;
}
.nav-search input::placeholder{color:#6E8299;}
.kbd{
  font-size:11px;color:#8BA0B8;border:1px solid var(--border);
  border-radius:6px;padding:1px 6px;background:rgba(255,255,255,.04);
}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--radius-sm);
  background:var(--surface-2);border:1px solid var(--border);
  color:var(--text);font-size:16px;cursor:pointer;
}
.nav-toggle:hover{border-color:rgba(34,211,238,.45);color:var(--accent);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 24px;border-radius:var(--radius);
  font-size:15px;font-weight:700;letter-spacing:.3px;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{
  color:#04121F;
  background:linear-gradient(135deg,var(--accent),var(--accent-deep));
  box-shadow:0 8px 22px rgba(34,211,238,.22);
}
.btn-primary:hover{
  color:#04121F;transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(34,211,238,.5),0 10px 30px rgba(34,211,238,.3);
}
.btn-ghost{
  color:#DDEAF7;background:var(--surface);
  border-color:rgba(34,211,238,.35);
}
.btn-ghost:hover{color:#fff;background:rgba(34,211,238,.10);transform:translateY(-2px);}
.btn-sm{padding:9px 16px;font-size:13.5px;border-radius:var(--radius-sm);}
.btn-block{width:100%;}

/* ---------- glass card ---------- */
.glass{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow);
}
.glass-soft{
  background:var(--surface-2);
  border:1px solid var(--border);
  border-radius:var(--radius);
  backdrop-filter:blur(10px);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:600;letter-spacing:.4px;
  padding:4px 11px;border-radius:999px;
  color:var(--accent);background:rgba(34,211,238,.10);
  border:1px solid rgba(34,211,238,.26);
}
.badge-warm{color:var(--warn);background:rgba(250,204,21,.10);border-color:rgba(250,204,21,.28);}
.badge-muted{color:#A9BCD0;background:rgba(255,255,255,.05);border-color:var(--border);}

/* ---------- hero ---------- */
main{padding-top:var(--header-h);}
.page-hero{
  position:relative;overflow:hidden;
  padding:76px 0 72px;
  border-bottom:1px solid var(--border);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.24;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(11,18,32,.72),rgba(11,18,32,.94)),
    repeating-linear-gradient(0deg,rgba(255,255,255,.035) 0 1px,transparent 1px 46px);
}
.page-hero .hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.35fr .95fr;gap:44px;align-items:start;}
.hero-copy h1{font-size:clamp(28px,4.1vw,44px);margin-bottom:18px;}
.hero-copy .lede{font-size:16.5px;color:#BFD2E5;max-width:640px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:26px 0 20px;}
.meta-strip{
  display:flex;flex-wrap:wrap;gap:10px;
  list-style:none;padding:0;margin:0;
}
.meta-strip li{
  display:flex;align-items:center;gap:8px;
  font-size:13.5px;color:#B9CBDE;
  background:rgba(255,255,255,.05);
  border:1px solid var(--border);
  border-radius:999px;padding:7px 14px;margin:0;
}
.meta-strip i{color:var(--accent);font-size:12.5px;}
.version-card{padding:26px;}
.version-card .vc-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px;}
.version-card .vc-top strong{font-size:17px;}
.version-num{
  font-size:34px;font-weight:800;letter-spacing:.5px;
  background:linear-gradient(120deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  line-height:1.1;
}
.def-list{list-style:none;padding:0;margin:16px 0 20px;}
.def-list li{
  display:flex;justify-content:space-between;gap:16px;
  padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.09);
  font-size:14px;margin:0;
}
.def-list li:last-child{border-bottom:0;}
.def-list span{color:var(--muted);}
.def-list strong{color:#EAF3FC;font-weight:700;}
.platform-row{display:flex;gap:12px;margin-bottom:18px;}
.platform-row i{
  width:40px;height:40px;border-radius:11px;display:grid;place-items:center;
  background:rgba(255,255,255,.05);border:1px solid var(--border);
  color:var(--accent-2);font-size:16px;
}

/* ---------- layout: anchor + flow ---------- */
.split-layout{display:grid;grid-template-columns:262px minmax(0,1fr);gap:40px;align-items:start;}
.anchor-nav{position:sticky;top:calc(var(--header-h) + 24px);padding:22px;}
.anchor-nav h3{font-size:14px;letter-spacing:1px;color:var(--muted);text-transform:uppercase;font-weight:700;margin-bottom:14px;}
.anchor-nav ul{list-style:none;padding:0;margin:0;}
.anchor-nav li{margin:0;}
.anchor-nav a{
  display:flex;align-items:center;gap:10px;
  padding:10px 12px;border-radius:var(--radius-sm);
  font-size:14px;color:#B7C8DA;border-left:2px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.anchor-nav a:hover{background:rgba(34,211,238,.08);color:#fff;border-left-color:var(--accent);transform:translateX(2px);}
.anchor-nav .num{
  font-size:11.5px;font-weight:700;color:var(--accent);
  background:rgba(34,211,238,.10);border:1px solid rgba(34,211,238,.25);
  border-radius:6px;padding:1px 7px;
}
.anchor-note{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--border);
  font-size:12.8px;color:var(--muted);line-height:1.7;
}
.flow{display:flex;flex-direction:column;gap:24px;}
.flow-card{padding:32px;scroll-margin-top:100px;transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;}
.flow-card:hover{border-color:rgba(34,211,238,.3);transform:translateY(-2px);}
.flow-card h2{font-size:clamp(20px,2.3vw,26px);display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.flow-card h2 .idx{
  font-size:13px;font-weight:800;color:#04121F;
  background:linear-gradient(135deg,var(--accent),var(--accent-deep));
  border-radius:8px;padding:3px 9px;
}
.flow-card h3{font-size:17.5px;margin-top:26px;}
.flow-card p{color:#C2D3E4;font-size:15.3px;}
.flow-card > p:last-child{margin-bottom:0;}

.data-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:22px 0 6px;}
.data-cell{
  background:var(--surface-2);border:1px solid var(--border);
  border-radius:var(--radius);padding:18px;
}
.data-cell .label{font-size:12.8px;color:var(--muted);letter-spacing:.4px;display:block;margin-bottom:6px;}
.data-cell .value{font-size:22px;font-weight:800;color:#EAF4FF;letter-spacing:.4px;}
.data-cell .value small{font-size:13px;font-weight:600;color:var(--muted);margin-left:4px;}

.step-list{list-style:none;padding:0;margin:20px 0 0;counter-reset:step;}
.step-list li{
  position:relative;
  padding:0 0 20px 52px;
  border-left:1px solid rgba(255,255,255,.10);
  margin-left:17px;
  font-size:15px;color:#C4D5E6;
}
.step-list li:last-child{border-left-color:transparent;padding-bottom:0;}
.step-list li::before{
  counter-increment:step;content:counter(step);
  position:absolute;left:-17px;top:-2px;
  width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;
  font-size:13.5px;font-weight:800;color:#04121F;
  background:linear-gradient(135deg,var(--accent),var(--accent-deep));
  box-shadow:0 6px 16px rgba(34,211,238,.22);
}
.step-list strong{color:#F0F7FF;}
.inline-hint{
  display:block;margin-top:6px;font-size:13.2px;color:var(--muted);
}
code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:13px;color:var(--accent-2);
  background:rgba(34,211,238,.08);
  border:1px solid rgba(34,211,238,.18);
  border-radius:6px;padding:1px 7px;
}
.figure{margin:24px 0 6px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);position:relative;}
.figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.figure figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:12px 16px;font-size:13px;color:#CFE0F0;
  background:linear-gradient(180deg,transparent,rgba(9,15,27,.92));
}
.dual-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:22px;}
.mini-card{padding:22px;border-radius:var(--radius);background:var(--surface-2);border:1px solid var(--border);}
.mini-card h3{margin-bottom:10px;font-size:16.5px;display:flex;align-items:center;gap:9px;}
.mini-card h3 i{color:var(--accent);font-size:15px;}
.mini-card ul{padding-left:1.1em;margin-bottom:0;font-size:14.4px;color:#C0D1E2;}

.trouble-list{list-style:none;padding:0;margin:20px 0 0;display:flex;flex-direction:column;gap:14px;}
.trouble-list li{
  background:var(--surface-2);
  border:1px solid var(--border);
  border-left:3px solid rgba(34,211,238,.5);
  border-radius:var(--radius);
  padding:16px 18px;margin:0;
}
.trouble-list .q{display:block;font-weight:700;color:#F0F7FF;font-size:15px;margin-bottom:5px;}
.trouble-list .a{display:block;font-size:14.3px;color:#B9CBDE;}

.check-list{list-style:none;padding:0;margin:18px 0 0;}
.check-list li{
  position:relative;padding-left:30px;margin-bottom:12px;
  font-size:15px;color:#C4D5E6;
}
.check-list li::before{
  content:"\f00c";
  font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;left:0;top:2px;
  font-size:12px;color:var(--accent);
}
.note-block{
  margin-top:22px;padding:16px 18px;border-radius:var(--radius);
  background:rgba(34,211,238,.06);border:1px dashed rgba(34,211,238,.3);
  font-size:14.3px;color:#C6D8E9;
}
.note-block i{color:var(--warn);margin-right:8px;}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:920px;}
.faq-item{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);overflow:hidden;
  transition:border-color .2s ease,background .2s ease;
}
.faq-item[open]{border-color:rgba(34,211,238,.36);background:rgba(255,255,255,.06);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;min-height:56px;
  font-size:15.6px;font-weight:700;color:#EAF3FC;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .sign{
  flex-shrink:0;width:26px;height:26px;border-radius:8px;
  display:grid;place-items:center;
  border:1px solid rgba(34,211,238,.35);color:var(--accent);
  font-size:13px;transition:transform .2s ease,background .2s ease;
}
.faq-item[open] summary .sign{transform:rotate(45deg);background:rgba(34,211,238,.14);}
.faq-body{padding:0 22px 20px;color:#B9CBDE;font-size:14.8px;border-left:2px solid var(--accent);margin-left:22px;padding-left:16px;}
.faq-body p:last-child{margin-bottom:0;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:20px;border:1px solid var(--border);
  padding:52px 40px;text-align:center;
  background:
    radial-gradient(600px 260px at 50% 0%,rgba(34,211,238,.16),transparent 70%),
    rgba(255,255,255,.04);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow);
}
.cta-band h2{font-size:clamp(22px,3vw,32px);}
.cta-band p{color:#BFD2E5;max-width:640px;margin:0 auto 26px;font-size:15.6px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;}

/* ---------- related ---------- */
.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.related-card{display:flex;gap:18px;padding:18px;align-items:center;transition:border-color .2s ease,transform .2s ease;}
.related-card:hover{border-color:rgba(34,211,238,.35);transform:translateY(-2px);}
.related-card img{width:118px;height:82px;object-fit:cover;border-radius:var(--radius-sm);border:1px solid var(--border);flex-shrink:0;}
.related-card h3{font-size:16.5px;margin-bottom:6px;}
.related-card p{font-size:13.8px;color:var(--muted);margin:0 0 8px;}
.related-card .more-link{font-size:13.6px;font-weight:700;}

/* ---------- footer ---------- */
.site-footer{
  margin-top:40px;
  background:var(--bg-3);
  border-top:1px solid var(--border);
  padding:64px 0 0;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:16.5px;margin-bottom:14px;}
.footer-text{font-size:14px;color:var(--muted);line-height:1.8;max-width:360px;}
.footer-col h4{font-size:14.5px;letter-spacing:.6px;margin-bottom:16px;color:#DCE9F6;}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--muted);display:inline-block;transition:color .18s ease,transform .18s ease;}
.footer-col a:hover{color:var(--accent);transform:translateX(2px);}
.footer-contact li{display:flex;gap:10px;font-size:13.6px;color:var(--muted);line-height:1.7;}
.footer-contact i{color:var(--accent);margin-top:4px;font-size:12.5px;flex-shrink:0;}
.footer-bottom{
  margin-top:48px;padding:20px 0;
  border-top:1px solid var(--border);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:#7E93A9;
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .nav-links a{padding:9px 10px;font-size:14px;}
  .nav-search{min-width:200px;}
  .split-layout{grid-template-columns:230px minmax(0,1fr);gap:28px;}
}
@media (max-width:991px){
  .section{padding:64px 0;}
  .nav-search{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-links{
    position:fixed;top:var(--header-h);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;margin:0;
    padding:14px 20px 22px;
    background:rgba(10,17,30,.98);
    border-bottom:1px solid var(--border);
    box-shadow:0 18px 40px rgba(0,0,0,.45);
    display:none;
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:13px 14px;font-size:15px;}
  .page-hero .hero-grid{grid-template-columns:1fr;gap:32px;}
  .split-layout{grid-template-columns:1fr;gap:24px;}
  .anchor-nav{position:static;padding:18px;}
  .anchor-nav ul{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;-webkit-overflow-scrolling:touch;}
  .anchor-nav li{flex:0 0 auto;}
  .anchor-nav a{white-space:nowrap;border-left:0;border:1px solid var(--border);border-radius:999px;padding:8px 14px;font-size:13.4px;}
  .anchor-nav a:hover{transform:none;}
  .anchor-note{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:767px){
  body{font-size:15.5px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .page-hero{padding:52px 0 48px;}
  .flow-card{padding:24px 20px;}
  .data-grid{grid-template-columns:1fr;}
  .dual-grid{grid-template-columns:1fr;}
  .related-grid{grid-template-columns:1fr;}
  .related-card{flex-direction:column;align-items:flex-start;}
  .related-card img{width:100%;height:160px;}
  .cta-band{padding:40px 22px;}
  .hero-actions .btn{width:100%;}
  .meta-strip li{font-size:12.8px;padding:6px 12px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .brand-text small{display:none;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .brand-text{font-size:15px;}
  .flow-card h2{font-size:19.5px;}
  .step-list li{padding-left:44px;font-size:14.4px;}
}