/* roulang page: index */
:root{
  --bg:#080B14;
  --bg-2:#0D1220;
  --bg-deep:#060A14;
  --card:rgba(255,255,255,.055);
  --card-2:rgba(255,255,255,.08);
  --solid:#111A2C;
  --line:rgba(140,160,220,.18);
  --line-soft:rgba(255,255,255,.08);
  --txt:#EAF0FF;
  --txt-2:#A6B4D0;
  --txt-3:#6E7C99;
  --primary:#5B7CFF;
  --primary-l:#8AA0FF;
  --primary-d:#3C58D6;
  --mint:#2BE0C8;
  --amber:#FFB03A;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --shadow:0 10px 30px rgba(3,7,18,.55);
  --shadow-lg:0 18px 48px rgba(3,7,18,.7);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--txt);
  font-family:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--primary-l);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--mint)}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--mint);outline-offset:2px;border-radius:6px}
::selection{background:rgba(43,224,200,.28);color:#fff}
.mono{font-family:"SFMono-Regular",Consolas,"Barlow",ui-monospace,monospace;font-variant-numeric:tabular-nums;letter-spacing:.02em}

.shell{max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ 顶部导航 ============ */
.site-head{
  position:sticky;top:0;z-index:1030;
  background:rgba(8,13,24,.55);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:background .25s var(--ease),box-shadow .25s var(--ease);
}
.site-head.scrolled{background:rgba(6,10,18,.94);box-shadow:0 10px 30px rgba(3,7,18,.45)}
.site-head::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,var(--mint),rgba(91,124,255,.35) 40%,transparent 78%);
  opacity:0;transition:opacity .25s var(--ease);
}
.site-head.scrolled::after{opacity:.65}
.head-inner{display:flex;align-items:center;gap:20px;height:64px}

.brand{display:flex;align-items:center;gap:10px;color:var(--txt);font-weight:800;font-size:16.5px;letter-spacing:.01em;flex-shrink:0}
.brand:hover{color:var(--txt)}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;
  border:1px solid rgba(138,160,255,.42);border-radius:10px;
  background:linear-gradient(140deg,rgba(91,124,255,.32),rgba(43,224,200,.14));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14);
}
.brand-mark svg{width:18px;height:18px}
.brand-txt{display:flex;flex-direction:column;line-height:1.15}
.brand-sub{font-size:10.5px;font-weight:500;letter-spacing:.18em;color:var(--txt-3);margin-top:3px}

.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link-x{
  position:relative;display:inline-flex;align-items:center;height:38px;padding:0 14px;
  font-size:15px;color:var(--txt-2);border-radius:10px;
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-link-x::after{
  content:"";position:absolute;left:50%;bottom:3px;width:0;height:3px;border-radius:3px;
  background:var(--mint);transform:translateX(-50%);
  transition:width .22s var(--ease);
}
.nav-link-x:hover{color:var(--txt);background:rgba(255,255,255,.05)}
.nav-link-x:hover::after{width:16px}
.nav-link-x.active{color:var(--txt);font-weight:600}
.nav-link-x.active::after{width:16px}
.head-actions{display:flex;align-items:center;gap:14px;margin-left:14px}
.head-login{font-size:14px;color:var(--txt-2);white-space:nowrap}
.head-login:hover{color:var(--mint)}

.btn-amber{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border:0;border-radius:999px;
  background:linear-gradient(120deg,#FFC94F,#FF9E1F);
  color:#1A1200;font-weight:700;font-size:15px;letter-spacing:.01em;
  box-shadow:0 8px 24px rgba(255,176,58,.28);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),filter .18s var(--ease);
}
.btn-amber:hover{color:#1A1200;transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 12px 30px rgba(255,176,58,.42)}
.btn-amber:active{transform:translateY(1px)}
.btn-amber.sm{height:40px;padding:0 20px;font-size:14px}

.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:999px;
  background:transparent;border:1px solid rgba(138,160,255,.5);
  color:var(--txt);font-weight:600;font-size:15px;
  transition:border-color .18s var(--ease),background .18s var(--ease),transform .18s var(--ease),color .18s var(--ease);
}
.btn-ghost:hover{color:var(--mint);border-color:var(--mint);background:rgba(43,224,200,.08);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}

.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;
  background:rgba(255,255,255,.06);border:1px solid var(--line);color:var(--txt);
}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* 抽屉 */
.drawer{background:rgba(10,15,26,.97);backdrop-filter:blur(18px);border-left:1px solid var(--line);color:var(--txt);width:min(86vw,340px)}
.drawer .offcanvas-header{border-bottom:1px solid var(--line-soft);padding:18px 22px}
.drawer .offcanvas-title{font-size:15px;letter-spacing:.1em;color:var(--txt-3);font-weight:600}
.drawer .offcanvas-body{padding:18px 22px 28px;display:flex;flex-direction:column;gap:6px}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  font-size:18px;color:var(--txt-2);padding:14px 4px;border-bottom:1px solid var(--line-soft);
  min-height:44px;
}
.drawer-link:hover{color:var(--txt)}
.drawer-link.active{color:var(--mint)}
.drawer-cta{margin-top:20px}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:104px 0 92px;min-height:86vh;display:flex;align-items:center}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(1000px 520px at 78% 18%,rgba(91,124,255,.28),transparent 70%),
    linear-gradient(180deg,rgba(8,12,22,.80) 0%,rgba(8,12,22,.88) 55%,var(--bg) 100%);
}
.hero-grid-lines{position:absolute;inset:0;opacity:.05;background-image:linear-gradient(rgba(255,255,255,.9) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.9) 1px,transparent 1px);background-size:72px 72px;pointer-events:none}
.hero-inner{position:relative;z-index:2;width:100%}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 14px;border-radius:999px;
  background:rgba(91,124,255,.14);border:1px solid rgba(91,124,255,.35);
  color:var(--primary-l);font-size:12px;letter-spacing:.06em;
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--mint);display:inline-block;box-shadow:0 0 10px var(--mint)}
.hero h1{
  font-size:clamp(30px,4.2vw,46px);line-height:1.26;font-weight:800;letter-spacing:-.005em;
  margin:20px 0 16px;color:#fff;
}
.hero h1 em{font-style:normal;color:var(--mint)}
.hero-sub{font-size:17px;color:var(--txt-2);max-width:560px;margin:0 0 24px;line-height:1.8}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  height:30px;padding:0 13px;border-radius:10px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  font-size:13px;color:var(--txt-2);
}
.chip svg{width:13px;height:13px;color:var(--mint);flex:0 0 13px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:18px}
.hero-note{font-size:13px;color:var(--txt-3);margin:0}

/* 玻璃视觉卡 */
.hero-visual{position:relative}
.glass-frame{
  position:relative;border-radius:var(--r-lg);padding:10px;
  background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.1);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow-lg);
}
.glass-frame::before{
  content:"";position:absolute;inset:-1px;border-radius:calc(var(--r-lg) + 1px);pointer-events:none;
  background:linear-gradient(140deg,rgba(138,160,255,.55),rgba(43,224,200,.28) 45%,transparent 72%);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;padding:1px;
}
.glass-frame img{border-radius:var(--r-sm);width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-badge{
  position:absolute;left:-16px;bottom:26px;
  display:inline-flex;align-items:center;gap:10px;
  padding:10px 16px;border-radius:14px;
  background:rgba(13,18,32,.92);border:1px solid var(--line);
  box-shadow:var(--shadow);font-size:13px;color:var(--txt-2);
}
.hero-badge b{color:var(--mint);font-size:14px}

/* ============ 通用板块 ============ */
.section{padding:96px 0}
.section.tight{padding:72px 0}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.sec-title{font-size:clamp(22px,2.4vw,30px);font-weight:800;line-height:1.32;margin:0;color:var(--txt)}
.sec-sub{color:var(--txt-2);font-size:15px;margin:10px 0 0;max-width:660px}
.sec-eyebrow{font-size:12px;letter-spacing:.18em;color:var(--mint);margin-bottom:12px;font-weight:600}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--primary-l);white-space:nowrap}
.link-more span{transition:transform .18s var(--ease)}
.link-more:hover span{transform:translateX(3px)}

/* 功能亮点条 */
.feature-row{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:8px}
.feature-item{padding:6px 26px;border-left:1px solid var(--line-soft)}
.feature-item:first-child{border-left:0;padding-left:0}
.feature-item:last-child{padding-right:0}
.f-icon{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:rgba(43,224,200,.1);border:1px solid rgba(43,224,200,.28);color:var(--mint);margin-bottom:14px;
}
.f-icon svg{width:18px;height:18px}
.feature-item h3{font-size:16px;font-weight:700;margin:0 0 8px}
.feature-item p{font-size:14px;color:var(--txt-2);margin:0;line-height:1.8}

/* 轮播 */
.shot-wrap{position:relative}
.shot-figure{margin:0}
.shot-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-md);border:1px solid var(--line-soft)}
.shot-caption{padding:20px 4px 0}
.shot-caption h3{font-size:19px;font-weight:700;margin:0 0 6px}
.shot-caption p{font-size:14.5px;color:var(--txt-2);margin:0}
#shotCarousel{position:relative;padding:0 0 4px}
#shotCarousel .carousel-inner{overflow:hidden;border-radius:var(--r-md)}
#shotCarousel .carousel-control-prev,
#shotCarousel .carousel-control-next{
  width:42px;height:42px;top:38%;transform:translateY(-50%);
  background:rgba(13,18,32,.72);border:1px solid var(--line);border-radius:50%;
  backdrop-filter:blur(10px);opacity:1;transition:background .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
#shotCarousel .carousel-control-prev{left:12px}
#shotCarousel .carousel-control-next{right:12px}
#shotCarousel .carousel-control-prev:hover,
#shotCarousel .carousel-control-next:hover{background:rgba(43,224,200,.2);border-color:var(--mint);transform:translateY(-50%) scale(1.05)}
#shotCarousel .carousel-control-prev-icon,
#shotCarousel .carousel-control-next-icon{width:14px;height:14px}
#shotCarousel .carousel-indicators{position:static;margin:22px 0 0;gap:8px;justify-content:flex-start}
#shotCarousel .carousel-indicators [data-bs-target]{
  width:20px;height:3px;border-radius:3px;border:0;margin:0;padding:0;
  background:rgba(255,255,255,.22);opacity:1;
  transition:width .22s var(--ease),background .22s var(--ease);
}
#shotCarousel .carousel-indicators .active{width:36px;background:var(--mint)}

/* 规格区 */
.specs-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}
.spec-tabs{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 16px;border:0}
.spec-tabs .nav-link{
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--txt-2);
  border-radius:999px;padding:7px 18px;font-size:13.5px;line-height:1.4;
  transition:all .18s var(--ease);
}
.spec-tabs .nav-link:hover{color:var(--txt);border-color:rgba(138,160,255,.45)}
.spec-tabs .nav-link.active{background:rgba(43,224,200,.12);border-color:rgba(43,224,200,.45);color:var(--mint)}
.spec-card{
  background:var(--card);border:1px solid rgba(255,255,255,.09);border-radius:var(--r-md);
  padding:6px 24px;backdrop-filter:blur(16px);box-shadow:var(--shadow);
}
.spec-row{
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  min-height:44px;padding:9px 0;border-top:1px solid var(--line-soft);
  transition:background .18s var(--ease);
}
.spec-row:first-child{border-top:0}
.spec-card:hover .spec-row:hover{background:rgba(255,255,255,.03)}
.spec-row .k{font-size:14px;color:var(--txt-3)}
.spec-row .v{font-size:15px;color:var(--txt);text-align:right}

/* 评价墙 */
.review-wall{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.review-col{display:grid;gap:24px;align-content:start}
.review-col.offset{padding-top:38px}
.review-card{
  position:relative;padding:24px;
  background:var(--card);border:1px solid rgba(255,255,255,.09);border-radius:var(--r-md);
  backdrop-filter:blur(16px);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.review-card::after{
  content:"”";position:absolute;right:18px;top:4px;font-size:56px;line-height:1;
  color:rgba(138,160,255,.14);font-family:Georgia,serif;pointer-events:none;
}
.review-card:hover{transform:translateY(-4px);border-color:rgba(138,160,255,.4);box-shadow:var(--shadow-lg)}
.stars{display:flex;gap:4px;margin-bottom:14px}
.stars i{display:block;width:14px;height:4px;border-radius:2px;background:var(--mint);opacity:.9}
.review-card blockquote{margin:0 0 18px;font-size:15px;line-height:1.8;color:var(--txt-2)}
.review-foot{display:flex;align-items:center;gap:10px}
.avatar{
  width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(91,124,255,.35),rgba(43,224,200,.2));
  border:1px solid var(--line);font-size:14px;font-weight:700;color:var(--txt);
}
.review-name{font-size:14px;color:var(--txt);font-weight:600;line-height:1.4}
.review-plat{font-size:12px;color:var(--txt-3);line-height:1.4}

/* 下载卡 */
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.dl-card{
  position:relative;display:flex;flex-direction:column;
  padding:26px 22px;border-radius:var(--r-lg);
  background:var(--card);border:1px solid rgba(255,255,255,.09);
  backdrop-filter:blur(16px);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.dl-card:hover{transform:translateY(-4px);border-color:rgba(138,160,255,.45);box-shadow:var(--shadow-lg)}
.dl-card.recommended{border-color:rgba(255,176,58,.38);box-shadow:0 10px 30px rgba(255,176,58,.12)}
.dl-badge{
  position:absolute;top:14px;right:14px;
  height:22px;padding:0 10px;border-radius:999px;display:inline-flex;align-items:center;
  background:rgba(255,176,58,.16);border:1px solid rgba(255,176,58,.5);color:var(--amber);
  font-size:11px;letter-spacing:.06em;
}
.dl-ic{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;margin-bottom:16px;
  background:rgba(91,124,255,.14);border:1px solid rgba(91,124,255,.32);color:var(--primary-l);
}
.dl-ic svg{width:20px;height:20px}
.dl-card h3{font-size:17px;font-weight:700;margin:0 0 4px}
.dl-meta{font-size:13px;color:var(--txt-3);margin:0 0 18px}
.dl-card .dl-btn{
  margin-top:auto;display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 16px;border-radius:var(--r-sm);font-size:14px;font-weight:600;
  border:1px solid rgba(138,160,255,.45);color:var(--txt-2);background:transparent;
  transition:all .18s var(--ease);
}
.dl-card .dl-btn:hover{color:var(--mint);border-color:var(--mint);background:rgba(43,224,200,.08)}
.dl-card.recommended .dl-btn{
  background:linear-gradient(120deg,#FFC94F,#FF9E1F);color:#1A1200;border-color:transparent;
  box-shadow:0 8px 22px rgba(255,176,58,.24);
}
.dl-card.recommended .dl-btn:hover{filter:brightness(1.06);color:#1A1200}
.dl-foot{
  margin-top:24px;text-align:center;font-size:12.5px;color:var(--txt-3);
  display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:center;
}

/* CMS 资讯卡 */
.news-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px}
.news-card{
  display:flex;flex-direction:column;gap:10px;
  padding:24px;border-radius:var(--r-md);
  background:var(--card);border:1px solid rgba(255,255,255,.09);
  color:var(--txt);backdrop-filter:blur(16px);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(138,160,255,.45);box-shadow:var(--shadow-lg);color:var(--txt)}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;
  font-size:12px;letter-spacing:.04em;
  background:rgba(91,124,255,.14);border:1px solid rgba(91,124,255,.32);color:var(--primary-l);
  align-self:flex-start;
}
.tag-mint{background:rgba(43,224,200,.12);border-color:rgba(43,224,200,.32);color:var(--mint)}
.news-card h3{
  font-size:16.5px;font-weight:700;line-height:1.55;margin:0;color:var(--txt);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card p{
  font-size:14px;color:var(--txt-2);margin:0;line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:14px;border-top:1px solid var(--line-soft);font-size:12.5px;color:var(--txt-3)}
.news-foot .arrow{color:var(--primary-l);transition:transform .18s var(--ease)}
.news-card:hover .news-foot .arrow{transform:translateX(3px);color:var(--mint)}
.empty-state{
  min-height:96px;border-radius:var(--r-md);border:1px dashed rgba(138,160,255,.3);
  background:rgba(255,255,255,.03);display:flex;align-items:center;justify-content:center;gap:12px;
  padding:24px;color:var(--txt-3);font-size:14.5px;text-align:center;
}
.empty-state svg{width:20px;height:20px;color:var(--primary-l);flex:0 0 20px}

/* FAQ */
.faq-list{display:grid;gap:12px;max-width:880px;margin:0 auto}
.faq-item{
  position:relative;background:var(--card);border:1px solid rgba(255,255,255,.09);
  border-radius:14px;overflow:hidden;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.faq-item::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
  background:var(--mint);opacity:0;transition:opacity .2s var(--ease);
}
.faq-item[open]{border-color:rgba(43,224,200,.38);background:rgba(255,255,255,.075)}
.faq-item[open]::before{opacity:1}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;min-height:44px;font-size:16px;font-weight:600;color:var(--txt);
  transition:color .18s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--mint)}
.faq-ico{position:relative;width:16px;height:16px;flex:0 0 16px}
.faq-ico::before,.faq-ico::after{content:"";position:absolute;background:var(--mint);border-radius:2px;transition:transform .22s var(--ease),opacity .22s var(--ease)}
.faq-ico::before{left:0;top:7px;width:16px;height:2px}
.faq-ico::after{left:7px;top:0;width:2px;height:16px}
.faq-item[open] .faq-ico::after{transform:rotate(90deg);opacity:0}
.faq-a{padding:0 22px 20px;color:var(--txt-2);font-size:15px;line-height:1.85}
.faq-a p{margin:0}

/* 下载 CTA 收口 */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:34px 36px;border-radius:var(--r-lg);
  background:linear-gradient(120deg,rgba(91,124,255,.16),rgba(43,224,200,.08));
  border:1px solid rgba(138,160,255,.28);
  backdrop-filter:blur(16px);
  box-shadow:var(--shadow);
}
.cta-band h2{font-size:clamp(20px,2.2vw,25px);font-weight:800;margin:0 0 8px}
.cta-band p{margin:0;color:var(--txt-2);font-size:14.5px}

/* ============ 页脚 ============ */
.site-foot{
  margin-top:0;padding:64px 0 26px;
  background:var(--bg-deep);border-top:1px solid var(--line-soft);position:relative;
}
.site-foot::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:1px;
  background:linear-gradient(90deg,var(--primary),transparent 60%);
}
.foot-grid{display:grid;grid-template-columns:1.5fr .9fr .9fr 1.1fr;gap:40px}
.foot-brand .brand{margin-bottom:14px}
.foot-desc{font-size:13.5px;color:var(--txt-3);line-height:1.85;margin:0 0 16px;max-width:290px}
.foot-tags{display:flex;flex-wrap:wrap;gap:8px}
.foot-tags span{
  font-size:12px;color:var(--txt-3);padding:3px 11px;border-radius:999px;
  border:1px solid var(--line-soft);background:rgba(255,255,255,.03);
}
.foot-col h3{font-size:13px;letter-spacing:.14em;color:var(--txt-3);font-weight:600;margin:0 0 16px}
.foot-col ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.foot-col a,.foot-col span{font-size:13.5px;color:var(--txt-2);line-height:1.7}
.foot-col a:hover{color:var(--mint)}
.foot-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line-soft);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:var(--txt-3);
}
.foot-bottom p{margin:0}
.foot-bottom .mono{color:var(--txt-3)}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .hero-grid{gap:40px}
  .dl-grid{gap:16px}
  .foot-grid{grid-template-columns:1.5fr 1fr 1fr;gap:32px}
  .foot-col:last-child{grid-column:1 / -1}
}
@media (max-width:991px){
  .main-nav{display:none}
  .nav-toggle{display:inline-flex}
  .head-actions .btn-amber.sm{display:none}
  .hero{padding:80px 0 72px;min-height:auto}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-badge{left:auto;right:12px;bottom:-14px}
  .section{padding:72px 0}
  .section.tight{padding:56px 0}
  .feature-row{grid-template-columns:repeat(2,1fr);gap:30px 0}
  .feature-item{padding:0 22px}
  .feature-item:nth-child(odd){border-left:0;padding-left:0}
  .feature-item:nth-child(3),.feature-item:nth-child(4){border-top:1px solid var(--line-soft);padding-top:26px}
  .specs-grid{grid-template-columns:1fr;gap:28px}
  .review-wall{grid-template-columns:1fr}
  .review-col.offset{padding-top:0}
  .dl-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band{padding:26px}
}
@media (max-width:767px){
  .shell{padding:0 18px}
  .brand{font-size:15px}
  .brand-sub{display:none}
  .hero-sub{font-size:15.5px}
  .hero-cta .btn-amber,.hero-cta .btn-ghost{flex:1 1 100%}
  .cta-band .btn-amber,.cta-band .btn-ghost{flex:1 1 100%}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px}
  .cta-band{flex-direction:column;align-items:flex-start}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .foot-brand{grid-column:1 / -1}
  .foot-col:last-child{grid-column:1 / -1}
  .foot-bottom{flex-direction:column;gap:8px}
  #shotCarousel .carousel-control-prev{left:4px}
  #shotCarousel .carousel-control-next{right:4px}
}
@media (max-width:575px){
  .hero{padding:64px 0 60px}
  .chips{gap:6px}
  .chip{font-size:12px;height:28px;padding:0 10px}
  .feature-row{grid-template-columns:1fr}
  .feature-item{border-left:0;padding:0 0 20px;border-top:1px solid var(--line-soft);padding-top:20px}
  .feature-item:first-child{border-top:0;padding-top:0}
  .dl-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  #shotCarousel .carousel-indicators [data-bs-target]{width:16px}
  #shotCarousel .carousel-indicators .active{width:28px}
  .spec-card{padding:4px 16px}
  .spec-row{flex-direction:column;align-items:flex-start;gap:2px;padding:12px 0}
  .spec-row .v{text-align:left}
  .faq-item summary{font-size:15px;padding:16px 18px}
  .faq-a{padding:0 18px 18px}
  .section{padding:56px 0}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
  --bg:#060A14;
  --bg-2:#0B1120;
  --glass:rgba(255,255,255,.055);
  --panel:#111A2C;
  --brand:#5B7CFF;
  --brand-l:#8AA0FF;
  --brand-d:#3C58D6;
  --mint:#2BE0C8;
  --amber:#FFB03A;
  --amber-l:#FFC46A;
  --tx:#EAF0FF;
  --tx-2:#A6B4D0;
  --tx-3:#6E7C99;
  --line:rgba(122,155,255,.18);
  --line-2:rgba(255,255,255,.08);
  --r-lg:20px;
  --r:16px;
  --r-sm:12px;
  --sh:0 10px 30px rgba(3,7,18,.55);
  --sh-hi:0 18px 48px rgba(3,7,18,.7);
  --font:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,sans-serif;
  --mono:"Barlow","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--tx);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(900px 520px at 10% -12%, rgba(91,124,255,.16), transparent 62%),
    radial-gradient(760px 480px at 94% -6%, rgba(43,224,200,.08), transparent 64%);
  background-attachment:fixed;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand-l);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--mint)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:800;color:var(--tx)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.mono{font-family:var(--mono);letter-spacing:.02em}
.shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
:focus-visible{outline:2px solid var(--mint);outline-offset:2px;border-radius:6px}

/* ============ header ============ */
.site-head{
  position:sticky;top:0;z-index:1030;
  background:rgba(8,13,24,.55);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:background .22s var(--ease);
}
.site-head::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,var(--mint),rgba(91,124,255,.5) 38%,transparent 88%);
  opacity:0;transition:opacity .22s var(--ease);
}
.site-head.is-scrolled{background:rgba(6,10,18,.92)}
.site-head.is-scrolled::after{opacity:1}
.head-inner{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--tx)}
.brand:hover{color:var(--tx)}
.brand-mark{
  width:34px;height:34px;display:grid;place-items:center;flex:0 0 auto;
  border-radius:10px;border:1px solid var(--line);
  background:linear-gradient(150deg,rgba(91,124,255,.2),rgba(43,224,200,.08));
}
.brand-mark svg{width:22px;height:22px}
.brand-txt{font-size:15.5px;font-weight:800;letter-spacing:.01em;line-height:1.15}
.brand-sub{display:block;font-size:10.5px;font-weight:500;color:var(--tx-3);letter-spacing:.12em;margin-top:2px}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:10px}
.nav-link-x{
  position:relative;display:inline-flex;align-items:center;height:40px;
  padding:0 13px;border-radius:10px;color:var(--tx-2);
  font-size:14.5px;font-weight:500;transition:color .18s var(--ease);
}
.nav-link-x::after{
  content:"";position:absolute;left:13px;right:13px;bottom:5px;height:3px;border-radius:3px;
  background:var(--mint);transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--ease);
}
.nav-link-x:hover{color:var(--tx)}
.nav-link-x:hover::after{transform:scaleX(1)}
.nav-link-x.active{color:#fff}
.nav-link-x.active::after{transform:scaleX(1)}
.head-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.btn-amber{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border:0;border-radius:999px;
  background:linear-gradient(120deg,var(--amber-l),var(--amber));
  color:#1A1200;font-size:14.5px;font-weight:700;cursor:pointer;
  box-shadow:0 8px 24px rgba(255,176,58,.28);
  transition:transform .18s var(--ease),filter .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-amber:hover{color:#1A1200;transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 12px 30px rgba(255,176,58,.38)}
.btn-amber:active{transform:translateY(1px)}
.btn-amber.btn-sm{height:40px;padding:0 18px;font-size:14px}
.link-login{
  display:inline-flex;align-items:center;height:40px;padding:0 16px;
  border:1px solid var(--line);border-radius:999px;
  color:var(--tx-2);font-size:14px;font-weight:500;
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.link-login:hover{color:var(--mint);border-color:rgba(43,224,200,.5);background:rgba(43,224,200,.08)}
.nav-toggle{
  width:44px;height:44px;display:none;place-items:center;
  background:var(--glass);border:1px solid var(--line);border-radius:12px;color:var(--tx);
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.nav-toggle:hover{border-color:rgba(138,160,255,.45);background:rgba(91,124,255,.14)}
.nav-toggle svg{width:20px;height:20px}

/* drawer */
.drawer-x{background:rgba(8,13,24,.96);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border-left:1px solid var(--line);width:min(84vw,340px)}
.drawer-x .offcanvas-header{border-bottom:1px solid var(--line-2);padding:18px 20px}
.drawer-x .offcanvas-title{font-size:15px;font-weight:800;color:var(--tx)}
.drawer-x .btn-close{filter:invert(1) grayscale(1) brightness(1.8);opacity:.7}
.drawer-x .offcanvas-body{padding:18px 20px 26px;display:flex;flex-direction:column;gap:8px}
.drawer-link{
  display:flex;align-items:center;height:48px;padding:0 14px;border-radius:12px;
  color:var(--tx-2);font-size:18px;font-weight:500;border:1px solid transparent;
  transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease);
}
.drawer-link:hover,.drawer-link.active{color:#fff;background:rgba(91,124,255,.14);border-color:var(--line)}
.drawer-cta{margin-top:14px;display:flex;flex-direction:column;gap:10px}
.drawer-cta .btn-amber{width:100%}
.drawer-cta .link-login{width:100%;justify-content:center;height:44px}

/* ============ post hero ============ */
.post-hero{
  position:relative;
  border-bottom:1px solid var(--line-2);
  background:
    linear-gradient(180deg,rgba(6,10,18,.86),rgba(6,10,18,.95)),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  padding:26px 0 42px;
}
.post-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(140,170,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(140,170,255,.055) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.9;
}
.post-hero .shell{position:relative;z-index:1}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--tx-3)}
.crumbs a{color:var(--tx-3)}
.crumbs a:hover{color:var(--mint)}
.crumbs .sep{color:rgba(110,124,153,.65)}
.crumbs .cur{color:var(--brand-l)}
.cat-pill{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:500;letter-spacing:.04em;
  color:var(--mint);background:rgba(43,224,200,.12);border:1px solid rgba(43,224,200,.4);
}
.post-h1{
  margin:16px 0 14px;
  font-size:clamp(26px,3.6vw,36px);
  font-weight:800;
  line-height:1.3;
  max-width:900px;
  color:#F3F6FF;
}
.post-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13px;color:var(--tx-3);
}
.post-meta .dot{width:3px;height:3px;border-radius:50%;background:rgba(110,124,153,.8)}
.post-meta .mono{color:var(--tx-2)}

/* ============ layout ============ */
.post-wrap{padding:44px 0 88px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:44px;align-items:start}
.main-col{min-width:0}
.prose{
  max-width:800px;
  font-size:17px;
  line-height:1.9;
  color:var(--tx-2);
  overflow-wrap:break-word;
}
.prose > *:first-child{margin-top:0}
.prose h2{
  font-size:24px;color:var(--tx);
  border-left:4px solid var(--mint);
  padding-left:12px;
  margin:38px 0 16px;
  scroll-margin-top:88px;
}
.prose h3{font-size:19px;color:var(--tx);margin:30px 0 12px}
.prose h4{font-size:16.5px;color:var(--brand-l);margin:24px 0 10px}
.prose p{margin:0 0 20px}
.prose a{color:var(--brand-l);border-bottom:1px solid rgba(138,160,255,.4)}
.prose a:hover{color:var(--mint);border-bottom-color:rgba(43,224,200,.6)}
.prose ul,.prose ol{margin:0 0 20px;padding-left:22px}
.prose ul li{list-style:disc;margin-bottom:10px;line-height:1.85}
.prose ol li{list-style:decimal;margin-bottom:10px;line-height:1.85}
.prose li::marker{color:var(--mint)}
.prose blockquote{
  margin:24px 0;padding:16px 20px;
  border-left:3px solid var(--mint);
  background:rgba(43,224,200,.07);
  border-radius:0 12px 12px 0;
  font-style:italic;color:#C6D3EC;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{
  border-radius:12px;border:1px solid var(--line);
  margin:24px auto;
}
.prose figure{margin:24px 0}
.prose figcaption{font-size:12px;color:var(--tx-3);text-align:center;margin-top:10px}
.prose table{
  width:100%;border-collapse:separate;border-spacing:0;
  margin:24px 0;font-size:15px;
  border:1px solid var(--line);border-radius:12px;overflow:hidden;
}
.prose thead th{
  background:rgba(91,124,255,.14);color:var(--tx);
  font-size:13.5px;font-weight:600;text-align:left;
  padding:12px 14px;border-bottom:1px solid var(--line);
}
.prose tbody td{
  padding:12px 14px;border-bottom:1px solid var(--line-2);color:var(--tx-2);vertical-align:top;
}
.prose tbody tr:last-child td{border-bottom:0}
.prose tbody tr:hover td{background:rgba(255,255,255,.03)}
.prose code{
  font-family:var(--mono);font-size:14px;
  background:rgba(91,124,255,.16);color:#C9D6FF;
  padding:2px 7px;border-radius:6px;
}
.prose pre{
  background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:12px;
  padding:16px;overflow-x:auto;margin:24px 0;
}
.prose pre code{background:transparent;padding:0}
.prose hr{border:0;border-top:1px solid var(--line-2);margin:32px 0}

/* empty */
.empty-post{
  max-width:800px;padding:44px 32px;text-align:center;
  border-radius:var(--r);border:1px solid var(--line);
  background:var(--glass);
}
.empty-post h2{font-size:22px;margin-bottom:14px;color:var(--tx)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:12px;
  border:1px solid var(--line);background:transparent;
  color:var(--tx);font-size:14.5px;font-weight:600;
  transition:border-color .18s var(--ease),background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.btn-ghost:hover{color:var(--mint);border-color:rgba(43,224,200,.5);background:rgba(43,224,200,.08)}
.btn-ghost:active{transform:translateY(1px)}

/* ============ sidebar ============ */
.side{position:sticky;top:88px;display:grid;gap:18px}
.side-box{
  border:1px solid var(--line);border-radius:var(--r);
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  padding:20px;
  box-shadow:var(--sh);
}
.side-title{
  display:flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--tx-3);text-transform:uppercase;margin-bottom:12px;
}
.side-title::before{
  content:"";width:14px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--mint));
}
.toc-list a{
  display:block;padding:7px 0 7px 12px;
  border-left:2px solid transparent;
  font-size:14px;color:var(--tx-2);line-height:1.6;
  transition:color .18s var(--ease),border-color .18s var(--ease),padding-left .18s var(--ease);
}
.toc-list a:hover{color:var(--tx);border-left-color:var(--mint);padding-left:15px}
.side-rec a{
  display:block;padding:12px 0;
  border-bottom:1px dashed var(--line-2);
}
.side-rec a:last-child{border-bottom:0;padding-bottom:0}
.side-rec a:first-child{padding-top:0}
.side-rec h4{
  font-size:14.5px;font-weight:600;color:var(--tx);line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s var(--ease);
}
.side-rec a:hover h4{color:var(--mint)}
.side-rec .t{font-size:12px;color:var(--tx-3);margin-top:6px;font-family:var(--mono)}

/* ============ post end ============ */
.post-end{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin:44px 0 0;padding-top:26px;border-top:1px solid var(--line-2);
}
.post-end .tags{display:flex;flex-wrap:wrap;gap:8px}
.tag-x{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;letter-spacing:.04em;color:var(--brand-l);
  background:rgba(91,124,255,.14);border:1px solid rgba(91,124,255,.32);
}
.rec-block{margin-top:52px}
.block-head{margin-bottom:22px}
.block-head h2{font-size:clamp(20px,2.2vw,26px)}
.block-head p{font-size:14px;color:var(--tx-3);margin-top:8px}
.rec-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.rec-card{
  display:flex;flex-direction:column;
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--glass);overflow:hidden;box-shadow:var(--sh);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.rec-card:hover{transform:translateY(-4px);border-color:rgba(138,160,255,.4);box-shadow:var(--sh-hi)}
.rec-card .thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:linear-gradient(150deg,rgba(91,124,255,.25),rgba(43,224,200,.12))}
.rec-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .25s var(--ease)}
.rec-card:hover .thumb img{transform:scale(1.03)}
.rec-card .body{padding:20px 22px 22px}
.rec-card h3{font-size:17px;line-height:1.5;color:var(--tx)}
.rec-card p{font-size:14px;color:var(--tx-3);margin-top:8px}
.rec-card .more{
  display:inline-flex;align-items:center;gap:6px;margin-top:14px;
  font-size:13.5px;font-weight:600;color:var(--brand-l);
}
.rec-card .more svg{transition:transform .18s var(--ease)}
.rec-card:hover .more{color:var(--mint)}
.rec-card:hover .more svg{transform:translateX(3px)}

.dl-strip{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-top:34px;padding:24px 26px;
  border:1px solid var(--line);border-radius:var(--r);
  background:linear-gradient(120deg,rgba(91,124,255,.16),rgba(43,224,200,.07));
}
.dl-strip h3{font-size:17px}
.dl-strip p{font-size:13.5px;color:var(--tx-2);margin-top:6px}

/* ============ footer ============ */
.site-foot{
  position:relative;margin-top:40px;
  background:var(--bg-2);
  padding:64px 0 0;
}
.site-foot::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(91,124,255,.85),rgba(43,224,200,.25) 45%,transparent 92%);
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px}
.foot-desc{font-size:13.5px;color:var(--tx-3);line-height:1.85;margin-top:16px;max-width:300px}
.foot-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.foot-tags span{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;color:var(--tx-2);
  background:rgba(255,255,255,.05);border:1px solid var(--line-2);
}
.foot-col h3{
  font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--tx);
  margin-bottom:16px;
}
.foot-col ul{display:grid;gap:10px}
.foot-col li a,.foot-col li span{font-size:13.5px;color:var(--tx-3);line-height:1.7}
.foot-col li a:hover{color:var(--mint)}
.foot-bottom{
  margin-top:48px;padding:20px 0 26px;border-top:1px solid var(--line-2);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
}
.foot-bottom p{font-size:13px;color:var(--tx-3)}

@media (max-width:1199.98px){
  .layout{grid-template-columns:minmax(0,1fr) 290px;gap:32px}
  .foot-grid{grid-template-columns:1.3fr 1fr 1fr;gap:30px}
  .foot-col:last-child{grid-column:span 3}
}
@media (max-width:991.98px){
  .head-inner{height:56px;gap:12px}
  .main-nav{display:none}
  .link-login{display:none}
  .nav-toggle{display:grid}
  .layout{grid-template-columns:minmax(0,1fr)}
  .side{position:static;order:2;grid-template-columns:repeat(2,minmax(0,1fr))}
  .prose{max-width:none}
  .post-wrap{padding:34px 0 64px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .foot-col:last-child{grid-column:span 2}
  .rec-grid{grid-template-columns:1fr}
}
@media (max-width:767.98px){
  .shell{padding:0 16px}
  .post-hero{padding:20px 0 34px}
  .post-h1{margin:14px 0 12px}
  .side{grid-template-columns:1fr}
  .btn-amber.btn-sm{height:38px;padding:0 14px;font-size:13px}
  .dl-strip{padding:20px;flex-direction:column;align-items:flex-start}
  .dl-strip .btn-amber{width:100%}
  .post-end{align-items:flex-start;flex-direction:column}
  .post-end .btn-ghost{width:100%}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .foot-col:last-child{grid-column:span 1}
  .site-foot{padding:48px 0 0}
  .prose{font-size:16.5px}
}
@media (max-width:575.98px){
  .brand-txt{font-size:14px}
  .brand-sub{font-size:9.5px;letter-spacing:.08em}
  .post-meta{font-size:12.5px}
  .prose h2{font-size:21px;margin:32px 0 14px}
  .prose h3{font-size:18px}
  .empty-post{padding:32px 20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .rec-card:hover{transform:none}
}

/* roulang page: category1 */
:root{
    --ink:#0A0C11;
    --ink-2:#0F131A;
    --ink-3:#151A23;
    --paper:#EDE7D9;
    --text:#E2DCCF;
    --muted:#A49E8E;
    --dim:#7A7568;
    --blue:#8095E2;
    --blue-deep:#4A5CA8;
    --teal:#4FD8C0;
    --amber:#F2AC44;
    --line:rgba(226,220,207,.13);
    --line-strong:rgba(226,220,207,.26);
    --card:rgba(255,255,255,.042);
    --card-2:rgba(255,255,255,.07);
    --r-lg:18px;
    --r:14px;
    --r-sm:10px;
    --shadow:0 18px 44px rgba(0,0,0,.5);
    --shadow-soft:0 8px 24px rgba(0,0,0,.34);
    --ease:180ms cubic-bezier(.2,.7,.3,1);
    --serif:"Noto Serif SC","Songti SC","SimSun",serif;
    --sans:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",sans-serif;
    --mono:"Barlow",ui-monospace,SFMono-Regular,Menlo,monospace;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background-color:var(--ink);
    background-image:
      radial-gradient(ellipse 70% 50% at 18% -4%, rgba(128,149,226,.13), transparent 62%),
      radial-gradient(ellipse 60% 46% at 88% 4%, rgba(79,216,192,.07), transparent 58%);
    color:var(--text);
    font-family:var(--sans);
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{display:block;max-width:100%}
  a{color:var(--blue);text-decoration:none;transition:color var(--ease)}
  a:hover{color:var(--teal)}
  h1,h2,h3,h4{margin:0;line-height:1.32;font-weight:700}
  p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  button{font-family:inherit}
  :focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:4px}
  .shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
  .mono{font-family:var(--mono);letter-spacing:.04em}

  /* ---------- 顶部导航 ---------- */
  .site-head{
    position:sticky;top:0;z-index:1000;
    background:rgba(10,12,17,.7);
    -webkit-backdrop-filter:blur(14px) saturate(1.15);
    backdrop-filter:blur(14px) saturate(1.15);
    border-bottom:1px solid transparent;
    transition:background var(--ease),border-color var(--ease);
  }
  .site-head.is-stuck{background:rgba(8,10,14,.95);border-bottom-color:var(--line)}
  .head-inner{display:flex;align-items:center;gap:26px;height:74px}
  .brand{display:inline-flex;align-items:center;gap:11px;color:var(--text);flex:0 0 auto}
  .brand:hover{color:var(--paper)}
  .brand-mark{
    width:36px;height:36px;flex:0 0 36px;display:grid;place-items:center;
    border:1px solid var(--line-strong);border-radius:10px;
    background:linear-gradient(150deg,rgba(128,149,226,.2),rgba(79,216,192,.08));
    box-shadow:inset 0 1px 0 rgba(255,255,255,.1);
  }
  .brand-mark svg{width:21px;height:21px}
  .brand-txt{
    display:flex;flex-direction:column;line-height:1.15;
    font-family:var(--serif);font-size:17px;font-weight:700;letter-spacing:.02em;
  }
  .brand-sub{font-family:var(--sans);font-size:11px;font-weight:500;letter-spacing:.18em;color:var(--dim);margin-top:3px}
  .main-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
  .nav-link-x{
    position:relative;padding:10px 13px;border-radius:8px;
    color:var(--muted);font-size:15px;transition:color var(--ease),background var(--ease);
  }
  .nav-link-x::after{
    content:"";position:absolute;left:13px;right:13px;bottom:5px;height:2px;border-radius:2px;
    background:var(--teal);transform:scaleX(0);transform-origin:left center;
    transition:transform var(--ease);
  }
  .nav-link-x:hover{color:var(--paper);background:rgba(255,255,255,.045)}
  .nav-link-x:hover::after{transform:scaleX(1)}
  .nav-link-x.active{color:var(--paper)}
  .nav-link-x.active::after{transform:scaleX(1)}
  .head-cta{display:flex;align-items:center;gap:14px;flex:0 0 auto}
  .link-quiet{color:var(--muted);font-size:14px;transition:color var(--ease)}
  .link-quiet:hover{color:var(--paper)}
  .nav-toggle{
    display:none;align-items:center;justify-content:center;
    width:44px;height:44px;border-radius:10px;
    border:1px solid var(--line-strong);background:rgba(255,255,255,.04);
    color:var(--text);cursor:pointer;transition:border-color var(--ease),background var(--ease);
  }
  .nav-toggle:hover{border-color:var(--teal);background:rgba(79,216,192,.1)}
  .nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative}
  .nav-toggle span::before,.nav-toggle span::after{
    content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;
  }
  .nav-toggle span::before{top:-6px}
  .nav-toggle span::after{top:6px}

  /* ---------- 抽屉 ---------- */
  .drawer-mask{
    position:fixed;inset:0;z-index:1100;background:rgba(3,5,9,.66);
    opacity:0;pointer-events:none;transition:opacity 200ms ease;
  }
  .drawer-mask.open{opacity:1;pointer-events:auto}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;z-index:1200;
    width:min(84vw,340px);padding:26px 22px;
    display:flex;flex-direction:column;gap:6px;
    background:rgba(9,11,16,.985);
    border-left:1px solid var(--line-strong);
    transform:translateX(101%);transition:transform 230ms cubic-bezier(.2,.7,.3,1);
  }
  .drawer.open{transform:translateX(0)}
  .drawer-title{font-size:12px;letter-spacing:.2em;color:var(--dim);margin:6px 0 14px}
  .drawer a.d-link{
    display:flex;align-items:center;min-height:48px;padding:0 12px;border-radius:10px;
    color:var(--text);font-size:17px;border:1px solid transparent;transition:all var(--ease);
  }
  .drawer a.d-link:hover,.drawer a.d-link.active{
    border-color:rgba(79,216,192,.34);background:rgba(79,216,192,.08);color:var(--paper);
  }
  .drawer-foot{margin-top:auto;padding-top:20px;border-top:1px dashed var(--line)}
  body.locked{overflow:hidden}

  /* ---------- 按钮 ---------- */
  .btn-x{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:999px;
    font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
    border:1px solid transparent;cursor:pointer;text-decoration:none;
    transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
  }
  .btn-amber{
    background:linear-gradient(122deg,#F8C067,#EC9A29);
    color:#1A1200;box-shadow:0 8px 22px rgba(242,172,68,.26);
  }
  .btn-amber:hover{color:#1A1200;transform:translateY(-2px);box-shadow:0 14px 32px rgba(242,172,68,.38);filter:brightness(1.06)}
  .btn-amber:active{transform:translateY(1px);box-shadow:0 5px 14px rgba(242,172,68,.28)}
  .btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text)}
  .btn-ghost:hover{border-color:var(--teal);background:rgba(79,216,192,.09);color:var(--paper);transform:translateY(-2px)}
  .btn-ghost:active{transform:translateY(1px)}
  .btn-sm{height:40px;padding:0 18px;font-size:14px}
  .link-arrow{display:inline-flex;align-items:center;gap:7px;font-size:14px;color:var(--blue)}
  .link-arrow svg{transition:transform var(--ease)}
  .link-arrow:hover{color:var(--teal)}
  .link-arrow:hover svg{transform:translateX(3px)}

  /* ---------- Hero ---------- */
  .hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);padding:52px 0 78px}
  .hero-bg{
    position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');
    background-size:cover;background-position:center;opacity:.34;filter:saturate(.5) contrast(1.02);
  }
  .hero-veil{
    position:absolute;inset:0;
    background:
      linear-gradient(180deg,rgba(10,12,17,.76) 0%,rgba(10,12,17,.9) 58%,var(--ink) 100%),
      repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 1px,transparent 1px 84px);
  }
  .hero-inner{
    position:relative;display:grid;grid-template-columns:1.06fr .94fr;
    gap:54px;align-items:center;
  }
  .crumb{display:flex;flex-wrap:wrap;align-items:center;gap:9px;font-size:13px;color:var(--dim);margin-bottom:20px}
  .crumb a{color:var(--dim)}
  .crumb a:hover{color:var(--teal)}
  .crumb .sep{color:rgba(226,220,207,.28)}
  .crumb .cur{color:var(--muted)}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12px;letter-spacing:.2em;color:var(--teal);
    padding:6px 13px;border-radius:999px;
    border:1px dashed rgba(79,216,192,.44);background:rgba(79,216,192,.07);
  }
  .eyebrow::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--teal)}
  .hero-title{
    font-family:var(--serif);font-weight:700;
    font-size:clamp(30px,4.1vw,46px);line-height:1.26;letter-spacing:.01em;
    color:var(--paper);margin:18px 0 16px;
  }
  .hero-lead{font-size:16.5px;line-height:1.9;color:var(--muted);max-width:54ch}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
  .anchor-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
  .chip{
    display:inline-flex;align-items:center;gap:7px;height:36px;padding:0 15px;
    border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.035);
    color:var(--muted);font-size:13px;letter-spacing:.02em;
    transition:all var(--ease);
  }
  .chip:hover{color:var(--paper);border-color:rgba(79,216,192,.45);background:rgba(79,216,192,.09);transform:translateY(-2px)}
  .chip .dot{width:5px;height:5px;border-radius:50%;background:var(--blue)}
  .hero-art{
    position:relative;margin:0;border-radius:var(--r-lg);overflow:hidden;
    border:1px solid var(--line-strong);box-shadow:var(--shadow);
    background:var(--ink-3);
  }
  .hero-art img{width:100%;aspect-ratio:16/10;object-fit:cover}
  .hero-art::after{
    content:"";position:absolute;inset:0;pointer-events:none;
    box-shadow:inset 0 0 0 1px rgba(255,255,255,.07),inset 0 -60px 70px -40px rgba(0,0,0,.7);
  }
  .hero-art figcaption{
    position:absolute;left:14px;bottom:14px;
    font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--paper);
    padding:5px 11px;border-radius:999px;background:rgba(8,10,14,.72);
    border:1px solid var(--line-strong);
  }

  /* ---------- 板块通用 ---------- */
  .section{padding:86px 0}
  .section.alt{background:var(--ink-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .sec-head{
    display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;
    padding-bottom:22px;margin-bottom:38px;border-bottom:1px dashed var(--line);
  }
  .sec-num{font-family:var(--mono);font-size:12px;letter-spacing:.22em;color:var(--dim);display:block;margin-bottom:10px}
  .sec-title{font-family:var(--serif);font-size:clamp(22px,2.5vw,30px);color:var(--paper)}
  .sec-desc{color:var(--muted);font-size:15px;line-height:1.85;max-width:62ch;margin-top:12px}

  /* ---------- 功能矩阵 ---------- */
  .matrix{display:grid;grid-template-columns:repeat(12,1fr);gap:22px}
  .mx-card{
    grid-column:span 6;
    display:flex;flex-direction:column;
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--shadow-soft);overflow:hidden;
    transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease),background var(--ease);
  }
  .mx-card:hover{
    transform:translateY(-4px);border-color:rgba(128,149,226,.42);
    box-shadow:0 20px 48px rgba(0,0,0,.56);background:rgba(255,255,255,.058);
  }
  .mx-card.span-7{grid-column:span 7}
  .mx-card.span-5{grid-column:span 5}
  .mx-card.span-12{grid-column:span 12}
  .mx-media{overflow:hidden;position:relative}
  .mx-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform 320ms cubic-bezier(.2,.7,.3,1)}
  .mx-card.has-media:hover .mx-media img{transform:scale(1.03)}
  .mx-body{padding:26px 26px 28px;display:flex;flex-direction:column;gap:12px;flex:1}
  .tag-x{
    display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;
    font-size:12px;letter-spacing:.08em;
    background:rgba(128,149,226,.14);border:1px solid rgba(128,149,226,.34);color:#ABB9F0;
    width:fit-content;
  }
  .tag-x.teal{background:rgba(79,216,192,.11);border-color:rgba(79,216,192,.34);color:#8FE8DA}
  .tag-x.amber{background:rgba(242,172,68,.12);border-color:rgba(242,172,68,.36);color:#F5C784}
  .mx-card h3{font-family:var(--serif);font-size:21px;color:var(--paper);line-height:1.42}
  .mx-card p{color:var(--muted);font-size:15px;line-height:1.9}
  .mx-list{display:grid;gap:9px;margin-top:2px}
  .mx-list li{position:relative;padding-left:19px;font-size:14.5px;color:var(--muted);line-height:1.75}
  .mx-list li::before{
    content:"";position:absolute;left:1px;top:.66em;width:6px;height:6px;
    background:var(--teal);border-radius:2px;transform:rotate(45deg);opacity:.9;
  }

  /* ---------- 横向滚动截图带 ---------- */
  .shots-head{display:flex;align-items:center;gap:10px;margin-left:auto}
  .round-btn{
    width:44px;height:44px;border-radius:50%;display:grid;place-items:center;
    border:1px solid var(--line-strong);background:rgba(255,255,255,.04);
    color:var(--text);cursor:pointer;transition:all var(--ease);
  }
  .round-btn:hover{border-color:var(--teal);background:rgba(79,216,192,.1);color:var(--paper)}
  .round-btn:active{transform:translateY(1px)}
  .shots-track{
    display:flex;gap:20px;overflow-x:auto;padding:4px 4px 18px;
    scroll-snap-type:x mandatory;scrollbar-color:rgba(128,149,226,.45) transparent;
    scrollbar-width:thin;
  }
  .shots-track::-webkit-scrollbar{height:6px}
  .shots-track::-webkit-scrollbar-track{background:rgba(255,255,255,.04);border-radius:99px}
  .shots-track::-webkit-scrollbar-thumb{background:rgba(128,149,226,.45);border-radius:99px}
  .shot{
    flex:0 0 min(392px,82vw);scroll-snap-align:start;
    background:var(--card);border:1px solid var(--line);border-radius:var(--r);
    overflow:hidden;transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
  }
  .shot:hover{transform:translateY(-4px);border-color:rgba(128,149,226,.4);box-shadow:var(--shadow)}
  .shot img{width:100%;aspect-ratio:16/10;object-fit:cover}
  .shot-cap{padding:16px 18px 20px}
  .shot-cap h3{font-size:16px;color:var(--paper);margin-bottom:6px;font-family:var(--serif)}
  .shot-cap p{font-size:13.5px;color:var(--dim);line-height:1.7}

  /* ---------- 运行环境 ---------- */
  .env-wrap{display:grid;grid-template-columns:.88fr 1.12fr;gap:44px;align-items:start}
  .env-copy .sec-title{margin-bottom:14px}
  .env-copy p{color:var(--muted);font-size:15px;line-height:1.9;margin-bottom:22px}
  .plat-tabs{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:24px}
  .plat-tabs span{
    display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;
    font-size:12.5px;letter-spacing:.06em;color:var(--dim);
    border:1px dashed var(--line-strong);background:rgba(255,255,255,.03);
    transition:all var(--ease);
  }
  .plat-tabs span.on{color:#8FE8DA;border-style:solid;border-color:rgba(79,216,192,.44);background:rgba(79,216,192,.09)}
  .spec-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
    padding:10px 24px;box-shadow:var(--shadow-soft);
  }
  .kv{
    display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:10px;
    padding:14px 0;border-bottom:1px dashed var(--line);
    transition:background var(--ease);
  }
  .kv:last-child{border-bottom:0}
  .kv:hover{background:rgba(255,255,255,.028)}
  .kv .k{font-size:14px;color:var(--dim)}
  .kv .v{font-family:var(--mono);font-size:15px;letter-spacing:.02em;color:var(--paper)}
  .kv .v small{font-family:var(--sans);font-size:12.5px;color:var(--dim);margin-left:6px;letter-spacing:0}

  /* ---------- CTA 条 ---------- */
  .cta-band{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
    padding:34px 36px;border-radius:20px;
    border:1px solid var(--line-strong);
    background:
      linear-gradient(122deg,rgba(128,149,226,.16),rgba(79,216,192,.07) 62%,rgba(242,172,68,.08));
    box-shadow:var(--shadow);
  }
  .cta-band h2{font-family:var(--serif);font-size:clamp(20px,2.2vw,26px);color:var(--paper);margin-bottom:10px}
  .cta-band p{color:var(--muted);font-size:14.5px;line-height:1.8;max-width:56ch}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}

  /* ---------- FAQ ---------- */
  .faq-acc{max-width:920px}
  .faq-acc .accordion-item{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r);
    margin-bottom:12px;overflow:hidden;transition:border-color var(--ease),background var(--ease);
  }
  .faq-acc .accordion-item:hover{border-color:rgba(128,149,226,.36);background:rgba(255,255,255,.055)}
  .faq-acc .accordion-header{margin:0}
  .faq-acc .accordion-button{
    background:transparent;color:var(--paper);
    font-family:var(--sans);font-size:16px;font-weight:600;line-height:1.6;
    padding:18px 54px 18px 22px;box-shadow:none;border-radius:0;
    transition:background var(--ease),color var(--ease),box-shadow var(--ease);
  }
  .faq-acc .accordion-button:not(.collapsed){
    background:rgba(79,216,192,.07);color:#FFFFFF;
    box-shadow:inset 3px 0 0 var(--teal);
  }
  .faq-acc .accordion-button:focus{box-shadow:inset 0 0 0 2px rgba(79,216,192,.5);outline:none}
  .faq-acc .accordion-button::after{
    content:"+";background-image:none;width:26px;height:26px;
    display:grid;place-items:center;font-size:20px;font-weight:400;line-height:1;
    color:var(--teal);transform:none;position:absolute;right:20px;top:50%;margin-top:-13px;
    transition:transform var(--ease),color var(--ease);
  }
  .faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(45deg);color:var(--amber)}
  .faq-acc .accordion-body{padding:6px 24px 22px;color:var(--muted);font-size:15px;line-height:1.88}
  .faq-note{margin-top:20px;font-size:13.5px;color:var(--dim)}

  /* ---------- 页脚 ---------- */
  .site-foot{position:relative;background:var(--ink-2);padding:64px 0 26px;margin-top:0}
  .site-foot::before{
    content:"";position:absolute;top:0;left:0;right:0;height:1px;
    background:linear-gradient(90deg,rgba(128,149,226,.7),rgba(79,216,192,.3) 42%,transparent);
  }
  .foot-grid{display:grid;grid-template-columns:1.55fr .85fr .85fr 1.25fr;gap:38px}
  .foot-desc{color:var(--dim);font-size:14px;line-height:1.85;max-width:34ch;margin:16px 0 18px}
  .foot-tags{display:flex;flex-wrap:wrap;gap:8px}
  .foot-tags span{
    font-size:12px;color:var(--dim);padding:4px 11px;border-radius:999px;
    border:1px dashed var(--line-strong);transition:all var(--ease);
  }
  .foot-tags span:hover{color:var(--muted);border-color:rgba(79,216,192,.4)}
  .foot-col h3{font-size:14px;color:var(--paper);letter-spacing:.09em;margin:0 0 16px;font-weight:600}
  .foot-col ul{display:grid;gap:10px}
  .foot-col a,.foot-col span{color:var(--dim);font-size:14px;line-height:1.7}
  .foot-col a:hover{color:var(--paper)}
  .foot-bottom{
    display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;
    margin-top:46px;padding-top:20px;border-top:1px dashed var(--line);
    color:var(--dim);font-size:13px;
  }
  .foot-bottom p{margin:0}

  /* ---------- 动效偏好 ---------- */
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}
    *,*::before,*::after{transition-duration:1ms !important;animation-duration:1ms !important}
    .mx-card:hover,.shot:hover,.btn-x:hover,.chip:hover{transform:none}
  }

  /* ---------- 响应式 ---------- */
  @media (max-width:1199px){
    .hero-inner{gap:38px}
    .foot-grid{grid-template-columns:1.4fr .9fr .9fr;gap:32px}
    .foot-col:last-child{grid-column:span 3}
  }
  @media (max-width:991px){
    .main-nav{display:none}
    .nav-toggle{display:inline-flex}
    .head-cta{margin-left:auto}
    .head-inner{height:66px;gap:14px}
    .hero{padding:34px 0 60px}
    .hero-inner{grid-template-columns:1fr;gap:34px}
    .hero-art{order:2}
    .section{padding:66px 0}
    .mx-card,.mx-card.span-7,.mx-card.span-5,.mx-card.span-12{grid-column:span 12}
    .env-wrap{grid-template-columns:1fr;gap:30px}
    .cta-band{padding:26px 24px}
    .shots-head{margin-left:0}
    .sec-head{gap:14px}
  }
  @media (max-width:767px){
    .shell{padding:0 18px}
    body{font-size:15.5px}
    .hero-title{font-size:clamp(26px,7vw,34px)}
    .mx-body{padding:22px 20px 24px}
    .spec-card{padding:8px 18px}
    .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
    .foot-col:last-child{grid-column:span 2}
    .foot-bottom{flex-direction:column;align-items:flex-start}
    .cta-actions{width:100%}
    .btn-x{height:46px}
  }
  @media (max-width:575px){
    .head-cta .link-quiet{display:none}
    .btn-sm{padding:0 14px}
    .hero-actions{width:100%}
    .hero-actions .btn-x{width:100%}
    .cta-actions .btn-x{width:100%}
    .anchor-chips{gap:8px}
    .chip{height:34px;font-size:12.5px;padding:0 12px}
    .foot-grid{grid-template-columns:1fr}
    .foot-col:last-child{grid-column:span 1}
    .kv .v{font-size:14px}
    .shot{flex:0 0 86vw}
  }

/* roulang page: category2 */
:root{
  --ink:#060A14;
  --panel:#0B1120;
  --glass:rgba(255,255,255,0.055);
  --float:#111A2C;
  --blue:#5B7CFF;
  --blue-l:#8AA0FF;
  --blue-d:#3C58D6;
  --mint:#2BE0C8;
  --amber:#FFB03A;
  --txt:#EAF0FF;
  --txt-2:#A6B4D0;
  --txt-3:#6E7C99;
  --line:rgba(122,155,255,0.18);
  --rule:rgba(255,255,255,0.08);
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --sh:0 10px 30px rgba(3,7,18,0.55);
  --sh-hi:0 18px 48px rgba(3,7,18,0.7);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:"Barlow",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink);
  color:var(--txt);
  font-family:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--blue-l);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--mint)}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:800;letter-spacing:.01em}
p{margin:0 0 16px}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--mint);outline-offset:2px;border-radius:6px}
.mono{font-family:var(--mono);letter-spacing:.02em;font-variant-numeric:tabular-nums}

/* ---------- 容器 ---------- */
.shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.site-head{
  position:sticky;top:0;z-index:1030;
  background:rgba(8,13,24,0.55);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  transition:background .22s var(--ease),box-shadow .22s var(--ease);
}
.site-head::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,rgba(43,224,200,.75),rgba(91,124,255,.35) 42%,transparent 78%);
  opacity:0;transition:opacity .22s var(--ease);
}
.site-head.scrolled{background:rgba(6,10,18,0.92);box-shadow:0 10px 30px rgba(3,7,18,.55)}
.site-head.scrolled::after{opacity:1}
.head-inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--txt);flex:0 0 auto}
.brand:hover{color:#fff}
.brand-mark{
  width:34px;height:34px;display:grid;place-items:center;border-radius:11px;
  background:linear-gradient(140deg,rgba(91,124,255,.28),rgba(43,224,200,.16));
  border:1px solid rgba(138,160,255,.34);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.09);
}
.brand-mark svg{width:20px;height:20px}
.brand-txt{display:flex;flex-direction:column;font-weight:800;font-size:16px;line-height:1.15}
.brand-sub{font-size:10.5px;font-weight:500;color:var(--txt-3);letter-spacing:.16em;margin-top:2px}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link-x{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 13px;
  color:var(--txt-2);font-size:15px;border-radius:10px;transition:color .18s var(--ease)
}
.nav-link-x::after{
  content:"";position:absolute;left:13px;right:13px;bottom:3px;height:3px;border-radius:3px;
  background:var(--mint);transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease)
}
.nav-link-x:hover,.nav-link-x:focus-visible{color:var(--txt)}
.nav-link-x:hover::after{transform:scaleX(1)}
.nav-link-x.active{color:#fff}
.nav-link-x.active::after{transform:scaleX(1)}
.head-actions{display:flex;align-items:center;gap:14px;margin-left:8px}
.head-login{font-size:14px;color:var(--txt-2)}
.head-login:hover{color:var(--mint)}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:12px;
  background:var(--glass);border:1px solid var(--line);color:var(--txt);
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle svg{width:20px;height:20px}
.nav-toggle:hover{border-color:rgba(138,160,255,.45)}

/* ---------- 按钮 ---------- */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),filter .18s var(--ease);
}
.btn-primary-x{background:linear-gradient(120deg,#FFC24F,#FFB03A);color:#1A1200;box-shadow:0 8px 24px rgba(255,176,58,.28)}
.btn-primary-x:hover{transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 12px 30px rgba(255,176,58,.38);color:#1A1200}
.btn-primary-x:active{transform:translateY(1px)}
.btn-ghost-x{background:transparent;border-color:rgba(138,160,255,.42);color:var(--txt)}
.btn-ghost-x:hover{border-color:var(--mint);background:rgba(43,224,200,.08);color:#fff;transform:translateY(-2px)}
.btn-ghost-x:active{transform:translateY(1px)}
.btn-sm-x{height:38px;padding:0 18px;font-size:14px;border-radius:999px}
.btn-wide{width:100%}
.arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--blue-l)}
.arrow-link::after{content:"→";transition:transform .18s var(--ease)}
.arrow-link:hover::after{transform:translateX(3px)}
.arrow-link:hover{color:var(--mint)}

/* ---------- 标签 / 胶囊 ---------- */
.chip{
  display:inline-flex;align-items:center;gap:7px;height:28px;padding:0 12px;border-radius:999px;
  background:rgba(91,124,255,.14);border:1px solid rgba(138,160,255,.3);
  color:var(--blue-l);font-size:12px;letter-spacing:.04em;font-weight:500;
}
.chip-mint{background:rgba(43,224,200,.1);border-color:rgba(43,224,200,.32);color:var(--mint)}
.chip-mono{font-family:var(--mono);letter-spacing:.02em}
.tag-amber{
  position:absolute;top:14px;right:14px;height:24px;padding:0 10px;border-radius:999px;
  display:inline-flex;align-items:center;background:rgba(255,176,58,.16);
  border:1px solid rgba(255,176,58,.55);color:var(--amber);font-size:11.5px;font-weight:600;letter-spacing:.06em;
}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--txt-3);margin-bottom:22px}
.crumb a{color:var(--txt-3)}
.crumb a:hover{color:var(--mint)}
.crumb .sep{color:rgba(110,124,153,.7)}
.crumb .now{color:var(--blue-l)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:64px 0 68px;background:url("/assets/images/backpic/back-1.webp") center/cover no-repeat}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,20,.74) 0%,rgba(6,10,20,.88) 58%,var(--ink) 100%);
}
.hero::after{
  content:"";position:absolute;inset:0;opacity:.055;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.9) 0 1px,transparent 1px 44px),
                   repeating-linear-gradient(90deg,rgba(255,255,255,.9) 0 1px,transparent 1px 44px);
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.12fr .88fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(30px,4.2vw,46px);letter-spacing:.01em}
.hero h1 .accent{
  background:linear-gradient(120deg,#8AA0FF,#2BE0C8);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lede{color:var(--txt-2);font-size:16.5px;line-height:1.9;margin:20px 0 24px;max-width:620px}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:18px}
.hero-note{font-size:13px;color:var(--txt-3)}
.hero-figure{
  position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid rgba(138,160,255,.28);
  box-shadow:var(--sh-hi),inset 0 1px 0 rgba(255,255,255,.09);
  background:linear-gradient(140deg,rgba(91,124,255,.2),rgba(43,224,200,.08));
}
.hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;opacity:.92}
.hero-figure figcaption{
  position:absolute;left:14px;bottom:14px;
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;border-radius:999px;
  background:rgba(6,10,20,.72);border:1px solid rgba(138,160,255,.3);
  font-size:12px;color:var(--txt-2);letter-spacing:.04em;
}
.hero-figure .corner{
  position:absolute;right:14px;top:14px;height:24px;padding:0 10px;border-radius:6px;
  display:inline-flex;align-items:center;background:rgba(6,10,20,.7);
  border:1px dashed rgba(43,224,200,.5);color:var(--mint);font-size:11px;letter-spacing:.14em;
}

/* ---------- 锚点导航 ---------- */
.anchor-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.anchor-pill{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  color:var(--txt-2);font-size:13.5px;transition:all .18s var(--ease);
}
.anchor-pill:hover{border-color:rgba(43,224,200,.55);color:#fff;background:rgba(43,224,200,.08);transform:translateY(-2px)}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-panel{background:var(--panel)}
.sec-head{max-width:760px;margin-bottom:40px}
.sec-kicker{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.2em;color:var(--mint);margin-bottom:14px}
.sec-kicker::before{content:"";width:26px;height:1px;background:linear-gradient(90deg,transparent,var(--mint))}
.sec-title{font-size:clamp(22px,2.4vw,30px)}
.sec-desc{color:var(--txt-2);font-size:15.5px;margin-top:14px;margin-bottom:0;max-width:700px}
.hairline{height:1px;border:0;background:linear-gradient(90deg,rgba(91,124,255,.55),rgba(43,224,200,.28) 40%,transparent 85%);margin:0}

/* ---------- 前置确认条 ---------- */
.quick-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border:1px solid var(--line);border-radius:var(--r-md);
  background:linear-gradient(120deg,rgba(91,124,255,.09),rgba(43,224,200,.04));
  overflow:hidden;
}
.quick-item{padding:20px 22px;border-right:1px solid var(--rule)}
.quick-item:last-child{border-right:0}
.quick-item h3{font-size:15px;font-weight:700;margin-bottom:6px;display:flex;align-items:center;gap:8px}
.quick-item h3::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--mint);flex:0 0 auto}
.quick-item p{font-size:13.5px;color:var(--txt-3);margin:0;line-height:1.75}

/* ---------- 时间线 ---------- */
.timeline{position:relative;padding-left:64px;margin-top:8px}
.timeline::before{
  content:"";position:absolute;left:23px;top:10px;bottom:18px;width:2px;
  background:linear-gradient(180deg,rgba(91,124,255,.85),rgba(43,224,200,.6) 62%,transparent);
}
.tl-item{position:relative;margin-bottom:26px}
.tl-item:last-child{margin-bottom:0}
.tl-num{
  position:absolute;left:-64px;top:4px;width:48px;height:48px;border-radius:50%;
  display:grid;place-items:center;font-family:var(--mono);font-size:16px;font-weight:600;color:#fff;
  background:radial-gradient(circle at 32% 28%,rgba(91,124,255,.55),rgba(11,17,32,.95) 70%);
  border:1px solid rgba(138,160,255,.45);
  box-shadow:0 0 0 6px rgba(91,124,255,.08),0 0 22px rgba(43,224,200,.22);
}
.tl-card{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--glass);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  padding:22px 24px;box-shadow:var(--sh);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.tl-card:hover{transform:translateY(-4px);border-color:rgba(138,160,255,.42);box-shadow:var(--sh-hi)}
.tl-card h3{font-size:18px;margin-bottom:8px}
.tl-card p{font-size:14.8px;color:var(--txt-2);margin:0}
.tl-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tl-thumb{
  margin-top:16px;border-radius:var(--r-sm);overflow:hidden;border:1px solid var(--rule);max-width:360px;
}
.tl-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .22s var(--ease)}
.tl-card:hover .tl-thumb img{transform:scale(1.03)}

/* ---------- 规格卡 ---------- */
.spec-grid{display:grid;grid-template-columns:40% 60%;gap:48px;align-items:start}
.spec-aside h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:16px}
.spec-aside p{color:var(--txt-2);font-size:15.5px}
.spec-aside .btn-x{margin-top:8px}
.spec-card{
  border:1px solid var(--line);border-radius:var(--r-lg);background:var(--float);
  box-shadow:var(--sh-hi),inset 0 1px 0 rgba(255,255,255,.06);overflow:hidden;
}
.spec-tabs{display:flex;flex-wrap:wrap;gap:8px;padding:18px 20px 14px;border-bottom:1px solid var(--rule)}
.spec-tab{
  height:34px;padding:0 15px;border-radius:999px;font-size:13.5px;cursor:pointer;
  background:rgba(255,255,255,.045);border:1px solid var(--line);color:var(--txt-2);
  transition:all .18s var(--ease);
}
.spec-tab:hover{color:#fff;border-color:rgba(138,160,255,.45)}
.spec-tab.is-on{background:rgba(43,224,200,.12);border-color:rgba(43,224,200,.55);color:var(--mint);font-weight:600}
.spec-panel{display:none;padding:8px 20px 18px}
.spec-panel.is-on{display:block}
.spec-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:44px;padding:6px 4px;border-top:1px solid var(--rule);
  transition:background .18s var(--ease);
}
.spec-row:first-child{border-top:0}
.spec-row:hover{background:rgba(255,255,255,.03)}
.spec-k{font-size:14px;color:var(--txt-3)}
.spec-v{font-family:var(--mono);font-size:15px;color:var(--txt);text-align:right;letter-spacing:.02em}

/* ---------- 下载卡组 ---------- */
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.dl-card{
  position:relative;display:flex;flex-direction:column;gap:10px;
  padding:24px 22px 22px;border-radius:var(--r-md);
  background:var(--glass);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  box-shadow:var(--sh);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.dl-card:hover{transform:translateY(-4px);border-color:rgba(138,160,255,.45);box-shadow:0 18px 48px rgba(3,7,18,.7),0 0 0 1px rgba(138,160,255,.18)}
.dl-card.is-hot{border-color:rgba(255,176,58,.42);box-shadow:0 18px 44px rgba(3,7,18,.66)}
.dl-icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(91,124,255,.28),rgba(43,224,200,.14));
  border:1px solid rgba(138,160,255,.3);color:var(--blue-l);
}
.dl-icon svg{width:22px;height:22px}
.dl-card h3{font-size:17px;margin-top:4px}
.dl-sub{font-size:13px;color:var(--txt-3);margin:0}
.dl-figs{display:flex;flex-wrap:wrap;gap:6px;margin:4px 0 6px}
.dl-figs span{font-family:var(--mono);font-size:12px;color:var(--txt-2);background:rgba(255,255,255,.05);border:1px solid var(--rule);border-radius:6px;padding:2px 8px}
.dl-card .btn-x{margin-top:auto}
.dl-note{display:flex;flex-wrap:wrap;gap:18px;justify-content:center;font-size:13px;color:var(--txt-3);margin-top:26px;text-align:center}
.dl-note .mono{color:var(--txt-2)}
.dl-head{text-align:center;max-width:680px;margin:0 auto 40px}
.dl-head .sec-kicker{justify-content:center}
.dl-head .sec-kicker::before{display:none}
.dl-head .sec-desc{margin-left:auto;margin-right:auto}

/* ---------- FAQ ---------- */
.acc{max-width:920px}
.acc .accordion-item{
  background:var(--glass);border:1px solid var(--line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.acc .accordion-item:hover{border-color:rgba(138,160,255,.36);box-shadow:0 10px 26px rgba(3,7,18,.5)}
.acc .accordion-header{margin:0}
.acc .accordion-button{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;padding:17px 22px;background:transparent;border:0;color:var(--txt);
  font-size:16px;font-weight:600;text-align:left;box-shadow:none;
}
.acc .accordion-button:not(.collapsed){color:#fff;background:rgba(43,224,200,.06)}
.acc .accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:3px;background:var(--mint);
}
.acc .accordion-button::after{
  content:"+";flex:0 0 auto;width:26px;height:26px;line-height:24px;text-align:center;
  font-family:var(--mono);font-size:17px;color:var(--mint);
  border:1px solid rgba(43,224,200,.4);border-radius:8px;background:transparent;
  transition:transform .18s var(--ease);
}
.acc .accordion-button:not(.collapsed)::after{content:"−";transform:rotate(180deg)}
.acc .accordion-button:focus{box-shadow:none;outline:none}
.acc .accordion-button:focus-visible{outline:2px solid var(--mint);outline-offset:-2px}
.acc .accordion-body{padding:4px 22px 20px;font-size:15px;line-height:1.85;color:var(--txt-2)}
.acc .accordion-body strong{color:var(--txt)}

/* ---------- CTA 条 ---------- */
.mini-cta{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  padding:26px 28px;border-radius:var(--r-lg);
  background:linear-gradient(120deg,rgba(91,124,255,.16),rgba(43,224,200,.07));
  border:1px solid var(--line);box-shadow:var(--sh);
}
.mini-cta h3{font-size:19px;margin-bottom:6px}
.mini-cta p{margin:0;font-size:14.5px;color:var(--txt-2)}

/* ---------- 页脚 ---------- */
.site-foot{
  position:relative;background:#050810;padding:64px 0 28px;border-top:1px solid transparent;
}
.site-foot::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,rgba(91,124,255,.8),rgba(91,124,255,.2) 40%,transparent 82%);
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand .brand{margin-bottom:16px}
.foot-desc{font-size:13.5px;color:var(--txt-3);line-height:1.85;margin:0 0 16px;max-width:300px}
.foot-tags{display:flex;flex-wrap:wrap;gap:8px}
.foot-tags span{
  font-size:12px;color:var(--txt-2);padding:3px 10px;border-radius:999px;
  background:rgba(255,255,255,.045);border:1px solid var(--rule);
}
.foot-col h3{font-size:14px;font-weight:700;color:var(--txt);margin-bottom:16px;letter-spacing:.06em}
.foot-col ul li{margin-bottom:10px}
.foot-col ul li a,.foot-col ul li span{font-size:13.5px;color:var(--txt-3);line-height:1.7}
.foot-col ul li a:hover{color:var(--mint)}
.foot-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  margin-top:44px;padding-top:20px;border-top:1px solid var(--rule);
}
.foot-bottom p{font-size:12.5px;color:var(--txt-3);margin:0}
.foot-bottom .mono{color:var(--txt-2)}

/* ---------- 移动抽屉 ---------- */
.offcanvas.drawer{
  background:linear-gradient(180deg,rgba(8,13,24,.98),rgba(6,10,18,.99));
  color:var(--txt);border-left:1px solid var(--line);width:min(86vw,360px);
}
.drawer .offcanvas-header{border-bottom:1px solid var(--rule);padding:18px 20px}
.drawer .drawer-title{font-size:15px;font-weight:700;letter-spacing:.08em;color:var(--txt-2)}
.drawer .btn-close{filter:invert(1) grayscale(1) brightness(1.6);opacity:.75}
.drawer .offcanvas-body{padding:20px;display:flex;flex-direction:column;gap:6px}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 4px;font-size:18px;color:var(--txt-2);border-bottom:1px solid var(--rule);
}
.drawer-link:hover,.drawer-link:focus-visible{color:#fff}
.drawer-link.active{color:#fff;border-bottom-color:rgba(43,224,200,.55)}
.drawer-foot{margin-top:auto;padding-top:24px;display:flex;flex-direction:column;gap:12px}
.drawer-foot .btn-x{width:100%}
.drawer-foot .head-login{text-align:center;font-size:14px}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .hero-inner{grid-template-columns:1fr .82fr;gap:36px}
  .spec-grid{grid-template-columns:44% 56%;gap:36px}
  .quick-row{grid-template-columns:repeat(2,1fr)}
  .quick-item:nth-child(2){border-right:0}
  .quick-item:nth-child(1),.quick-item:nth-child(2){border-bottom:1px solid var(--rule)}
}
@media (max-width:991px){
  .main-nav,.head-actions{display:none}
  .nav-toggle{display:inline-flex}
  .hero{padding:48px 0 56px}
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .hero-figure{order:2;max-width:560px}
  .hero-figure img{aspect-ratio:16/9}
  .section{padding:72px 0}
  .section-tight{padding:56px 0}
  .spec-grid{grid-template-columns:1fr;gap:28px}
  .dl-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .timeline{padding-left:56px}
  .timeline::before{left:19px}
  .tl-num{left:-56px;width:40px;height:40px;font-size:14px}
}
@media (max-width:767px){
  .shell{padding:0 16px}
  .hero h1{font-size:clamp(26px,7vw,32px)}
  .hero-lede{font-size:15.5px}
  .hero-cta .btn-x{flex:1 1 100%}
  .hero-note{font-size:12.5px}
  .quick-row{grid-template-columns:1fr}
  .quick-item{border-right:0;border-bottom:1px solid var(--rule)}
  .quick-item:last-child{border-bottom:0}
  .dl-grid{grid-template-columns:1fr}
  .mini-cta{flex-direction:column;align-items:flex-start}
  .mini-cta .btn-x{width:100%}
  .dl-note{justify-content:flex-start;text-align:left;gap:10px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .timeline{padding-left:48px}
  .timeline::before{left:16px}
  .tl-num{left:-48px;width:34px;height:34px;font-size:13px;box-shadow:0 0 0 4px rgba(91,124,255,.08)}
  .tl-card{padding:18px 18px}
  .spec-row{flex-direction:column;align-items:flex-start;gap:2px;padding:10px 2px}
  .spec-v{text-align:left}
  .acc .accordion-button{font-size:15px;padding:15px 18px}
  .acc .accordion-body{padding:2px 18px 18px}
}
@media (max-width:520px){
  .section{padding:56px 0}
  .brand-txt{font-size:14.5px}
  .brand-sub{font-size:9.5px;letter-spacing:.12em}
  .anchor-pill{height:34px;padding:0 13px;font-size:13px}
  .hero-cta{flex-direction:column}
  .btn-x{height:46px;padding:0 18px;font-size:14.5px}
  .btn-sm-x{height:36px}
  .dl-card{padding:20px 18px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important;scroll-behavior:auto !important}
  .tl-card:hover,.dl-card:hover,.btn-x:hover{transform:none}
  .tl-card:hover .tl-thumb img{transform:none}
}

/* roulang page: category3 */
:root{
  --bg:#060A14;
  --bg-soft:#0B1120;
  --glass:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.03);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(122,155,255,.18);
  --brand:#5B7CFF;
  --brand-light:#8AA0FF;
  --brand-deep:#3C58D6;
  --mint:#2BE0C8;
  --amber:#FFB03A;
  --text:#EAF0FF;
  --text-2:#A6B4D0;
  --muted:#6E7C99;
  --radius-lg:20px;
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 10px 30px rgba(3,7,18,.55);
  --shadow-lift:0 18px 48px rgba(3,7,18,.7);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:'Barlow',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:
    radial-gradient(900px 520px at 10% -10%,rgba(91,124,255,.16),transparent 62%),
    radial-gradient(760px 460px at 90% 2%,rgba(43,224,200,.09),transparent 64%),
    var(--bg);
  color:var(--text);
  font-family:'Noto Sans SC','PingFang SC','HarmonyOS Sans','Microsoft YaHei',system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--brand-light);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--mint)}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.28;letter-spacing:-.01em}
p{margin:0}
ul{list-style:none;margin:0;padding:0}
:focus-visible{outline:2px solid var(--mint);outline-offset:2px;border-radius:6px}
.shell{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono);letter-spacing:.02em}

/* ============ 顶部导航 ============ */
.site-head{
  position:sticky;top:0;z-index:1030;
  background:rgba(8,13,24,.55);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .18s var(--ease),border-color .18s var(--ease);
}
.site-head.is-scrolled{
  background:rgba(6,10,18,.92);
  border-bottom-color:var(--line-strong);
}
.head-inner{display:flex;align-items:center;gap:20px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;flex:0 0 auto}
.brand:hover{color:var(--text)}
.brand-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:10px;background:rgba(91,124,255,.14);border:1px solid var(--line-strong);flex:0 0 34px}
.brand-mark svg{width:22px;height:22px;display:block}
.brand-txt{display:flex;flex-direction:column;line-height:1.1;font-weight:800;font-size:16px;letter-spacing:.01em}
.brand-sub{font-size:11px;font-weight:500;letter-spacing:.16em;color:var(--muted);margin-top:4px}
.main-nav{display:none}
.nav-link-x{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 14px;
  border-radius:10px;color:var(--text-2);font-size:15px;font-weight:500;
  text-decoration:none;transition:color .18s var(--ease);
}
.nav-link-x::after{
  content:"";position:absolute;left:50%;bottom:2px;width:0;height:3px;border-radius:3px;
  background:var(--mint);transform:translateX(-50%);transition:width .18s var(--ease);
}
.nav-link-x:hover{color:var(--text)}
.nav-link-x:hover::after{width:18px}
.nav-link-x.active{color:var(--text);font-weight:700}
.nav-link-x.active::after{width:22px}
.head-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-toggle{
  width:44px;height:44px;display:grid;place-items:center;border-radius:12px;
  background:var(--glass);border:1px solid var(--line-strong);color:var(--text);cursor:pointer;
  transition:background .18s var(--ease),border-color .18s var(--ease);
}
.nav-toggle:hover{background:rgba(91,124,255,.16);border-color:rgba(138,160,255,.45)}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--text);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:700;letter-spacing:.01em;text-decoration:none;cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),filter .18s var(--ease);
  white-space:nowrap;
}
.btn-amber{
  background:linear-gradient(120deg,#FFC46B,#FFB03A);
  color:#1A1200;
  box-shadow:0 8px 24px rgba(255,176,58,.28);
}
.btn-amber:hover{color:#1A1200;transform:translateY(-2px);box-shadow:0 12px 32px rgba(255,176,58,.42);filter:brightness(1.06)}
.btn-amber:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:rgba(122,155,255,.42);color:var(--text)}
.btn-ghost:hover{border-color:var(--mint);background:rgba(43,224,200,.08);color:#fff;transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:10px}
.btn-lg{height:52px;padding:0 28px;font-size:16px}

/* ============ 通用板块 ============ */
.section{padding:96px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:14px}
.section-head p{color:var(--text-2);font-size:16px;line-height:1.9}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;
  letter-spacing:.1em;color:var(--mint);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--mint);display:block}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:500;letter-spacing:.05em;
  background:rgba(91,124,255,.14);color:var(--brand-light);border:1px solid rgba(91,124,255,.35);
}
.tag-mint{background:rgba(43,224,200,.12);color:var(--mint);border-color:rgba(43,224,200,.32)}
.divider{height:1px;border:0;background:linear-gradient(90deg,var(--line-strong),transparent);margin:0}

/* ============ 分类 Hero ============ */
.page-hero{position:relative;overflow:hidden;padding:56px 0 76px;border-bottom:1px solid var(--line)}
.hero-bg{
  position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity:.32;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(6,10,20,.86) 0%,rgba(6,10,20,.93) 55%,rgba(6,10,20,1) 100%),
    repeating-linear-gradient(0deg,rgba(122,155,255,.05) 0 1px,transparent 1px 64px);
}
.page-hero .shell{position:relative;z-index:2}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:22px}
.crumbs a{color:var(--text-2)}
.crumbs a:hover{color:var(--mint)}
.crumbs .sep{color:rgba(110,124,153,.65)}
.crumbs .cur{color:var(--brand-light)}
.page-hero h1{
  font-size:clamp(28px,3.9vw,44px);
  max-width:22em;
  margin:18px 0 18px;
}
.hero-lead{max-width:780px;color:var(--text-2);font-size:16px;line-height:1.9}
.pill-nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.pill-nav a{
  display:inline-flex;align-items:center;height:38px;padding:0 18px;border-radius:999px;
  font-size:13.5px;font-weight:500;color:var(--text-2);text-decoration:none;
  background:var(--glass);border:1px solid var(--line-strong);
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease),transform .18s var(--ease);
}
.pill-nav a:hover{color:#fff;border-color:rgba(43,224,200,.5);background:rgba(43,224,200,.08);transform:translateY(-1px)}

/* ============ 三步登录流程 ============ */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.step-card{
  position:relative;background:var(--glass);border:1px solid var(--line-strong);
  border-radius:var(--radius-lg);padding:30px 28px;box-shadow:var(--shadow);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease);
}
.step-card:hover{transform:translateY(-4px);border-color:rgba(138,160,255,.42);box-shadow:var(--shadow-lift);background:rgba(255,255,255,.075)}
.step-card:not(:last-child)::after{
  content:"";position:absolute;top:50%;right:-24px;width:24px;height:0;
  border-top:2px dashed rgba(122,155,255,.45);transform:translateY(-50%);
}
.step-num{
  font-family:var(--mono);font-size:46px;font-weight:700;line-height:1;letter-spacing:.02em;
  background:linear-gradient(120deg,#8AA0FF,#2BE0C8);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.step-card h3{font-size:19px;margin:18px 0 10px}
.step-card p{color:var(--text-2);font-size:15px;line-height:1.85}
.step-meta{
  display:inline-flex;align-items:center;gap:8px;margin-top:18px;font-size:12.5px;
  color:var(--mint);border:1px dashed rgba(43,224,200,.4);border-radius:999px;padding:4px 12px;
}

/* ============ 安全区（图 + 清单） ============ */
.security-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:52px;align-items:center}
.shot-frame{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line-strong);box-shadow:var(--shadow-lift);
  aspect-ratio:4/3;background:linear-gradient(135deg,rgba(91,124,255,.22),rgba(43,224,200,.12));
}
.shot-frame img{width:100%;height:100%;object-fit:cover;transition:transform .25s var(--ease)}
.shot-frame:hover img{transform:scale(1.03)}
.shot-frame::after{
  content:"";position:absolute;inset:0;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14);
  pointer-events:none;
}
.shot-cap{font-size:12.5px;color:var(--muted);margin-top:12px;text-align:center}
.check-list{display:grid;gap:14px}
.check-list li{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--glass-2);border:1px solid var(--line);border-radius:14px;
  padding:16px 18px;
  transition:background .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.check-list li:hover{background:rgba(255,255,255,.055);border-color:rgba(43,224,200,.32);transform:translateY(-2px)}
.check-ico{
  flex:0 0 22px;width:22px;height:22px;border-radius:6px;margin-top:4px;
  display:grid;place-items:center;
  background:rgba(43,224,200,.14);border:1px solid rgba(43,224,200,.45);
}
.check-ico svg{width:12px;height:12px;display:block}
.check-txt strong{display:block;font-size:15.5px;font-weight:700;margin-bottom:4px;color:var(--text)}
.check-txt span{font-size:14px;color:var(--text-2);line-height:1.8}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;margin:0 auto}
.faq-acc .accordion-item{
  background:var(--glass);border:1px solid var(--line-strong);border-radius:14px;
  margin-bottom:12px;overflow:hidden;
  transition:border-color .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease);
}
.faq-acc .accordion-item:hover{border-color:rgba(138,160,255,.38)}
.faq-acc .accordion-item:has(.accordion-button:not(.collapsed)){
  border-left:3px solid var(--mint);
  background:rgba(255,255,255,.07);
  box-shadow:var(--shadow);
}
.faq-acc .accordion-button{
  background:transparent;color:var(--text);font-size:16px;font-weight:700;
  padding:20px 22px;box-shadow:none;border-radius:0;line-height:1.5;
}
.faq-acc .accordion-button:not(.collapsed){color:#fff;background:transparent}
.faq-acc .accordion-button:focus{box-shadow:none;outline:none}
.faq-acc .accordion-button:focus-visible{outline:2px solid var(--mint);outline-offset:-4px;border-radius:12px}
.faq-acc .accordion-button::after{
  content:"";width:18px;height:18px;flex:0 0 18px;margin-left:auto;
  background-image:linear-gradient(var(--mint),var(--mint)),linear-gradient(var(--mint),var(--mint));
  background-size:12px 2px,2px 12px;
  background-position:center;
  background-repeat:no-repeat;
  transition:transform .18s var(--ease);
}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(45deg)}
.faq-acc .accordion-body{
  padding:0 22px 20px;color:var(--text-2);font-size:15px;line-height:1.85;
}

/* ============ 帮助入口条 ============ */
.help-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
  background:linear-gradient(120deg,rgba(91,124,255,.18),rgba(43,224,200,.08));
  border:1px solid var(--line-strong);border-radius:var(--radius-lg);
  padding:34px 38px;box-shadow:var(--shadow);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
}
.help-bar h2{font-size:clamp(20px,2.2vw,26px);margin-bottom:10px}
.help-bar p{color:var(--text-2);font-size:15px;line-height:1.85;max-width:620px}
.help-bar .help-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-foot{
  position:relative;padding:66px 0 28px;
  background:linear-gradient(180deg,rgba(11,17,32,.92),rgba(6,10,20,1));
  border-top:1px solid var(--line);
}
.site-foot::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(91,124,255,.9),rgba(43,224,200,.45),transparent);
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.15fr;gap:40px}
.foot-brand .brand{margin-bottom:16px}
.foot-desc{color:var(--text-2);font-size:13.5px;line-height:1.85;max-width:320px}
.foot-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.foot-tags span{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;color:var(--text-2);background:rgba(255,255,255,.045);border:1px solid var(--line);
}
.foot-col h3{font-size:14px;font-weight:700;color:var(--text);margin-bottom:16px;letter-spacing:.03em}
.foot-col ul{display:grid;gap:10px}
.foot-col li a,.foot-col li span{font-size:13.5px;color:var(--muted);line-height:1.7}
.foot-col li a:hover{color:var(--text)}
.foot-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  margin-top:46px;padding-top:20px;border-top:1px solid var(--line);
}
.foot-bottom p{font-size:13px;color:var(--muted)}
.foot-bottom .mono{color:var(--text-2)}

/* ============ 移动抽屉 ============ */
.drawer{
  width:min(340px,88vw)!important;
  background:rgba(6,10,18,.97)!important;
  border-left:1px solid var(--line-strong);
  color:var(--text);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
}
.drawer .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px}
.drawer .offcanvas-title{font-size:16px;font-weight:800;color:var(--text)}
.btn-close-x{
  width:40px;height:40px;display:grid;place-items:center;border-radius:10px;
  background:var(--glass);border:1px solid var(--line-strong);color:var(--text);
  font-size:20px;line-height:1;cursor:pointer;transition:background .18s var(--ease),border-color .18s var(--ease);
}
.btn-close-x:hover{background:rgba(91,124,255,.18);border-color:rgba(138,160,255,.5)}
.drawer .offcanvas-body{padding:20px;display:flex;flex-direction:column;gap:22px}
.drawer-nav{display:grid;gap:6px}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  padding:13px 14px;border-radius:12px;font-size:18px;font-weight:600;
  color:var(--text-2);text-decoration:none;border:1px solid transparent;
  transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease);
}
.drawer-nav a:hover{color:var(--text);background:rgba(255,255,255,.05);border-color:var(--line)}
.drawer-nav a.active{color:var(--text);background:rgba(91,124,255,.16);border-color:rgba(122,155,255,.35)}
.drawer-nav a.active::after{content:"";width:6px;height:6px;border-radius:50%;background:var(--mint)}
.drawer-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line)}

/* ============ 响应式 ============ */
@media (min-width:992px){
  .main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
  .head-actions{margin-left:12px}
}
@media (max-width:1199px){
  .security-grid{gap:36px}
}
@media (max-width:991px){
  .section{padding:72px 0}
  .page-hero{padding:44px 0 60px}
  .steps{grid-template-columns:1fr;gap:20px}
  .step-card:not(:last-child)::after{
    top:auto;bottom:-20px;right:auto;left:50%;width:0;height:20px;
    border-top:0;border-left:2px dashed rgba(122,155,255,.45);
    transform:translateX(-50%);
  }
  .security-grid{grid-template-columns:1fr;gap:32px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .help-bar{padding:28px 26px}
}
@media (max-width:767px){
  .shell{padding:0 18px}
  .section{padding:60px 0}
  .section-head{margin-bottom:28px}
  .page-hero h1{margin:16px 0 14px}
  .hero-lead{font-size:15px}
  .btn{width:auto}
  .help-bar .help-actions{width:100%}
  .help-bar .help-actions .btn{flex:1 1 200px}
}
@media (max-width:575px){
  .section{padding:52px 0}
  .brand-txt{font-size:15px}
  .brand-sub{display:none}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .step-card{padding:24px 20px}
  .faq-acc .accordion-button{font-size:15px;padding:16px 18px}
  .faq-acc .accordion-body{padding:0 18px 18px}
  .pill-nav a{height:34px;padding:0 14px;font-size:13px}
  .btn-lg{height:50px;font-size:15px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
  .step-card:hover,.check-list li:hover,.pill-nav a:hover{transform:none}
}