/* roulang page: index */
/* ===================== 设计变量 ===================== */
:root{
  --ink-950:#080D18;
  --ink-900:#0C1424;
  --ink-800:#121C30;
  --ink-700:#18253D;
  --brand:#2E4A8F;
  --brand-soft:#3B5DAB;
  --cyan:#2FD4C0;
  --lime:#C6F04A;
  --text:#E7ECF5;
  --text-2:#9AA7BD;
  --text-3:#6B7891;
  --border:rgba(255,255,255,.10);
  --glass:rgba(255,255,255,.05);
  --r-card:16px;
  --r-panel:20px;
  --r-img:12px;
  --r-btn:12px;
  --r-pill:999px;
  --sh-1:0 10px 30px rgba(0,0,0,.35);
  --sh-2:0 18px 44px rgba(0,0,0,.45);
  --glow:0 0 0 1px rgba(198,240,74,.35),0 10px 30px rgba(198,240,74,.18);
  --glow-hover:0 0 0 1px rgba(198,240,74,.6),0 14px 38px rgba(198,240,74,.26);
  --sec:88px;
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
}

/* ===================== 基础重置 ===================== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none;transition:color .18s ease-out}
a:hover,a:focus-visible{color:var(--lime)}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;letter-spacing:-.01em}
p{margin:0}
figure{margin:0}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}

/* Foundation 默认样式覆盖 */
body,p,li,div,span,a,button,input{font-family:var(--font-cn)}
h1,h2,h3,h4,.button{font-family:var(--font-cn)}
.accordion{background:transparent;border:0;margin:0}
.accordion-title{border:0;background:transparent;color:var(--text);padding:0}
.accordion-content{border:0;background:transparent;color:var(--text-2);padding:0;display:none}
.accordion-item{border:0;background:transparent}
.orbit-bullets{background:transparent}
.orbit-bullets button{background:rgba(255,255,255,.18);width:28px;height:4px;border-radius:var(--r-pill);margin:0 4px}
.orbit-bullets button.is-active{background:var(--lime);box-shadow:0 0 12px rgba(198,240,74,.55)}
.orbit-previous,.orbit-next{color:var(--text)}
.grid-x.grid-padding-x{margin-left:0;margin-right:0}
.grid-x.grid-padding-x>.cell{padding-left:0;padding-right:0}

/* ===================== 通用容器与排版 ===================== */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1320px}}
@media (max-width:639px){.container{padding:0 16px}}

.section{padding:44px 0}
.section-lg{padding:56px 0}
.section-head{margin-bottom:32px;max-width:760px}
.section-head h2{
  position:relative;
  font-size:clamp(24px,2.6vw,34px);
  line-height:1.3;
  padding-left:16px;
}
.section-head h2::before{
  content:"";
  position:absolute;
  left:0;top:.18em;bottom:.18em;
  width:3px;border-radius:2px;
  background:var(--lime);
  box-shadow:0 0 12px rgba(198,240,74,.65);
}
.section-head p{margin-top:12px;color:var(--text-2);font-size:15px;max-width:660px}
.eyebrow{
  display:inline-block;
  font-family:var(--font-num);
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--cyan);margin-bottom:10px;font-weight:600;
}
.muted{color:var(--text-2)}
.dim{color:var(--text-3)}

/* ===================== 按钮 ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:15px 26px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  transition:transform .18s ease-out,box-shadow .18s ease-out,filter .18s ease-out,background-color .18s ease-out,color .18s ease-out;
  white-space:nowrap;
}
.btn-primary{
  background:var(--lime);
  color:#0A1018;
  box-shadow:var(--glow);
  min-width:200px;
}
.btn-primary:hover,.btn-primary:focus-visible{
  background:var(--lime);color:#0A1018;
  transform:translateY(-2px);
  filter:brightness(1.06);
  box-shadow:var(--glow-hover);
}
.btn-primary:active{transform:translateY(0);filter:brightness(.94)}
.btn-secondary{
  background:transparent;
  color:var(--text);
  border-color:var(--brand);
}
.btn-secondary:hover,.btn-secondary:focus-visible{
  color:#fff;border-color:var(--brand-soft);
  transform:translateY(-2px);filter:brightness(1.06);
  box-shadow:0 10px 24px rgba(46,74,143,.35);
}
.btn-secondary:active{transform:translateY(0);filter:brightness(.94)}
.btn-ghost{
  background:transparent;color:var(--text-2);padding:12px 6px;border-radius:0;
  text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:1px;
}
.btn-ghost:hover,.btn-ghost:focus-visible{color:var(--lime);transform:none}
.btn-sm{padding:11px 18px;font-size:14px;min-width:0}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;transform:none}

.link-arrow{display:inline-flex;align-items:center;gap:8px;color:var(--cyan);font-size:14px;font-weight:600}
.link-arrow i{transition:transform .18s ease-out}
.link-arrow:hover i{transform:translateX(4px)}

/* ===================== 芯片 / 标签 ===================== */
.tag-chip{
  display:inline-flex;align-items:center;
  font-size:13px;line-height:1;
  padding:6px 12px;border-radius:var(--r-pill);
  background:rgba(47,212,192,.12);
  color:var(--cyan);
  border:1px solid rgba(47,212,192,.28);
  white-space:nowrap;
}
.tag-chip.is-dim{background:rgba(255,255,255,.05);color:var(--text-2);border-color:var(--border)}

/* ===================== 顶部导航 ===================== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(12,20,36,.72);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  backdrop-filter:blur(14px) saturate(130%);
  border-bottom:1px solid transparent;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:background-color .25s ease-out,border-color .25s ease-out;
}
.site-header.is-stuck{
  background:rgba(8,13,24,.9);
  border-bottom-color:var(--border);
}
.header-inner{
  display:flex;align-items:center;gap:24px;
  min-height:68px;
}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--text)}
.logo:hover{color:var(--text)}
.logo-mark{
  width:26px;height:26px;flex:0 0 26px;border-radius:8px;
  background:linear-gradient(135deg,var(--cyan),var(--brand));
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;left:7px;top:7px;
  width:12px;height:12px;border-radius:3px;
  background:var(--ink-900);
  transform:rotate(45deg);
}
.nav-chips{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-chip{
  font-size:14px;font-weight:500;
  padding:9px 16px;border-radius:var(--r-pill);
  color:var(--text-2);
  border:1px solid transparent;
  transition:color .18s ease-out,background-color .18s ease-out,border-color .18s ease-out;
}
.nav-chip:hover{color:var(--text);background:rgba(255,255,255,.06)}
.nav-chip.is-active{
  color:var(--lime);
  background:rgba(198,240,74,.08);
  border-color:rgba(198,240,74,.45);
  box-shadow:0 0 0 1px rgba(198,240,74,.14),0 6px 18px rgba(198,240,74,.10);
}
.header-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:var(--r-btn);
  border:1px solid var(--border);color:var(--text);
  align-items:center;justify-content:center;font-size:16px;
}
.nav-strip{display:none}
.nav-strip-inner{
  display:flex;gap:8px;overflow-x:auto;
  padding:10px 16px 12px;
  scrollbar-width:none;-ms-overflow-style:none;
  -webkit-overflow-scrolling:touch;
}
.nav-strip-inner::-webkit-scrollbar{display:none}
.nav-drawer{
  display:none;
  border-top:1px solid var(--border);
  background:rgba(8,13,24,.96);
  padding:16px;
}
.nav-drawer.is-open{display:block}
.nav-drawer a{
  display:block;padding:13px 4px;font-size:15px;color:var(--text-2);
  border-bottom:1px solid var(--border);
}
.nav-drawer a:last-of-type{border-bottom:0}
.nav-drawer .btn{width:100%;margin-top:14px}

/* ===================== Hero ===================== */
.hero{position:relative;overflow:hidden;padding:48px 0 72px}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center right;
  opacity:.4;
}
.hero-veil{
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(8,13,24,.95) 0%,rgba(8,13,24,.82) 46%,rgba(12,20,36,.72) 100%),
             linear-gradient(180deg,rgba(12,20,36,.2) 0%,var(--ink-900) 96%);
}
.hero .container{position:relative;z-index:2}
.hero-grid{align-items:center}
.hero h1{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.2;
  font-weight:700;
  max-width:15em;
}
.hero-sub{
  margin-top:18px;
  font-size:clamp(16px,1.6vw,18px);
  line-height:1.75;
  color:var(--text-2);
  max-width:34em;
}
.hero-panel{
  margin-top:28px;
  padding:24px 26px;
  border-radius:var(--r-panel);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  backdrop-filter:blur(14px) saturate(130%);
  border:1px solid var(--border);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.10),var(--sh-1);
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}
.hero-params{
  display:flex;flex-wrap:wrap;gap:8px 20px;
  margin-top:20px;padding-top:18px;
  border-top:1px solid var(--border);
  font-family:var(--font-num);
  font-size:13px;color:var(--text-3);
}
.hero-params span strong{color:var(--text-2);font-weight:600}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-badges .tag-chip{background:rgba(255,255,255,.05);color:var(--text-2);border-color:var(--border)}

.phone-frame{
  position:relative;
  margin:0 auto;
  width:100%;max-width:320px;
  border-radius:34px;
  padding:12px;
  background:linear-gradient(160deg,rgba(255,255,255,.10),rgba(255,255,255,.02));
  border:1px solid var(--border);
  box-shadow:var(--sh-2);
}
.phone-frame::before{
  content:"";position:absolute;left:50%;top:20px;transform:translateX(-50%);
  width:56px;height:5px;border-radius:var(--r-pill);background:rgba(255,255,255,.22);
}
.phone-frame img{
  width:100%;aspect-ratio:9/18;object-fit:cover;
  border-radius:24px;
}
.phone-caption{
  margin-top:14px;text-align:center;font-size:13px;color:var(--text-3);
}
.hero-side{position:relative}

/* ===================== 价值 bento ===================== */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:20px}
.bento-card{
  grid-column:span 12;
  background:var(--ink-800);
  border:1px solid var(--border);
  border-radius:var(--r-card);
  padding:26px;
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.bento-card:hover{transform:translateY(-2px);box-shadow:var(--sh-1);border-color:rgba(255,255,255,.18)}
.bento-card .ico{
  width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(47,212,192,.12);color:var(--cyan);
  font-size:18px;margin-bottom:18px;
}
.bento-card h3{font-size:19px;line-height:1.4;margin-bottom:10px}
.bento-card p{font-size:15px;color:var(--text-2);max-width:30em}
.bento-card.is-wide{background:var(--ink-700)}
.bento-card .meta-num{
  display:block;margin-top:16px;font-family:var(--font-num);
  font-size:13px;color:var(--cyan);letter-spacing:.06em;
}
@media (min-width:1024px){
  .bento-card.span-7{grid-column:span 7}
  .bento-card.span-5{grid-column:span 5}
}

/* ===================== 功能截图轮播 ===================== */
.shot-stage{
  border-radius:var(--r-panel);
  border:1px solid var(--border);
  background:var(--ink-800);
  padding:16px;
  box-shadow:var(--sh-1);
}
.shot{position:relative;border-radius:var(--r-img);overflow:hidden;background:var(--ink-950)}
.shot img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0}
.shot figcaption{
  padding:16px 18px;font-size:15px;font-weight:600;color:var(--text);
  background:var(--ink-800);
}
.shot .tag-chip{position:absolute;left:14px;top:14px;background:rgba(8,13,24,.72);border-color:var(--border);color:var(--cyan)}
.orbit{position:relative}
.orbit-previous,.orbit-next{
  width:44px;height:44px;border-radius:var(--r-pill);
  background:rgba(8,13,24,.72);border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  top:calc(50% - 22px);
  transition:background-color .18s ease-out,transform .18s ease-out;
}
.orbit-previous:hover,.orbit-next:hover{background:rgba(24,37,61,.95);transform:scale(1.06)}
.orbit-bullets{display:flex;justify-content:center;margin-top:18px;position:static}

/* ===================== 系统要求（规格卡） ===================== */
.spec-card{
  border-radius:var(--r-panel);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  backdrop-filter:blur(14px) saturate(130%);
  border:1px solid var(--border);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.10),var(--sh-1);
  padding:28px;
}
.spec-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 48px}
.spec-row{
  display:flex;align-items:center;gap:16px;min-height:48px;
  border-bottom:1px solid var(--border);
}
.spec-row:last-child{border-bottom:0}
.spec-key{flex:0 0 130px;font-size:14px;color:var(--text-3)}
.spec-val{font-size:15px;color:var(--text)}
.spec-note{margin-top:20px;font-size:13px;color:var(--text-3)}

/* ===================== 评价墙 ===================== */
.review-wall{columns:3;column-gap:20px}
.review-card{
  break-inside:avoid;margin-bottom:20px;
  border-radius:var(--r-card);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  backdrop-filter:blur(14px) saturate(130%);
  border:1px solid var(--border);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08),var(--sh-1);
  padding:22px;
}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{
  width:40px;height:40px;flex:0 0 40px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-weight:700;font-size:15px;color:#0A1018;
  background:linear-gradient(135deg,var(--cyan),var(--lime));
}
.review-name{font-size:14px;font-weight:600}
.review-date{font-size:12px;color:var(--text-3);font-family:var(--font-num)}
.stars{display:flex;gap:3px;margin-bottom:10px}
.stars svg{width:14px;height:14px;fill:var(--lime)}
.review-card p{font-size:15px;color:var(--text-2)}

/* ===================== 下载面板 ===================== */
.dl-panel{
  border-radius:var(--r-panel);
  background:var(--ink-800);
  border:1px solid var(--border);
  box-shadow:var(--sh-2);
  padding:32px;
  display:grid;grid-template-columns:1fr 160px;gap:32px;align-items:center;
}
.dl-panel h2{font-size:clamp(22px,2.2vw,28px);line-height:1.35}
.dl-panel .dl-desc{color:var(--text-2);font-size:15px;margin-top:10px}
.dl-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.dl-notes{margin-top:18px;font-size:13px;color:var(--text-3);display:flex;flex-wrap:wrap;gap:6px 18px}
.qr-box{
  width:140px;height:140px;border-radius:var(--r-img);
  border:1px dashed var(--border);
  background:var(--ink-900);
  display:flex;align-items:center;justify-content:center;
}
.qr-box svg{width:104px;height:104px}
.qr-wrap{text-align:center}
.qr-wrap span{display:block;margin-top:12px;font-size:13px;color:var(--text-3)}

/* ===================== 资讯列表 ===================== */
.news-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.news-card{
  display:grid;grid-template-columns:180px 1fr;
  background:var(--ink-800);
  border:1px solid var(--border);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-1);border-color:rgba(255,255,255,.18)}
.news-thumb{display:block;overflow:hidden;background:var(--ink-950)}
.news-thumb img{width:100%;height:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;transition:transform .3s ease-out}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:20px;display:flex;flex-direction:column;gap:10px;min-width:0}
.news-title{font-size:17px;line-height:1.45;font-weight:600}
.news-card:hover .news-title{color:#8FB4FF}
.news-title a{display:block;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.news-desc{font-size:14px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);font-family:var(--font-num);
}
.news-more{color:var(--cyan);font-weight:600;font-family:var(--font-cn)}
.news-empty{
  grid-column:1/-1;
  border:1px dashed var(--border);
  border-radius:var(--r-card);
  padding:44px 24px;text-align:center;
  background:rgba(255,255,255,.02);
}
.news-empty i{font-size:26px;color:var(--text-3)}
.news-empty p{margin:14px 0 16px;color:var(--text-2);font-size:15px}
.news-cover{display:none}
@media (min-width:1024px){.news-cover{display:block}}

/* ===================== FAQ ===================== */
.faq-wrap{max-width:860px}
.faq-item{
  border:1px solid var(--border);
  border-radius:var(--r-card);
  background:var(--ink-800);
  margin-bottom:12px;
  overflow:hidden;
  transition:background-color .18s ease-out,border-color .18s ease-out;
}
.faq-item.is-active{background:var(--ink-700);border-color:rgba(255,255,255,.18)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;padding:20px 22px;
  font-size:16px;font-weight:600;color:var(--text);text-align:left;
}
.faq-q i{color:var(--text-3);transition:transform .22s ease-out;flex:0 0 auto}
.faq-item.is-active .faq-q i{transform:rotate(180deg);color:var(--lime)}
.faq-a{padding:0 22px 20px 42px;font-size:15px;color:var(--text-2)}
.faq-a p+p{margin-top:.9em}

/* ===================== 订阅 ===================== */
.subscribe{
  border-radius:var(--r-panel);
  background:var(--ink-700);
  border:1px solid var(--border);
  padding:32px;
  display:grid;grid-template-columns:1.1fr 1fr;gap:32px;align-items:center;
}
.subscribe h2{font-size:clamp(20px,2vw,26px);line-height:1.4}
.subscribe p{margin-top:10px;color:var(--text-2);font-size:15px}
.sub-form{display:flex;gap:12px}
.sub-form input{
  flex:1;height:48px;padding:0 16px;
  background:var(--ink-900);color:var(--text);
  border:1px solid var(--border);border-radius:var(--r-btn);
  font-size:15px;
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.sub-form input::placeholder{color:var(--text-3)}
.sub-form input:focus{
  outline:none;border-color:var(--lime);
  box-shadow:0 0 0 3px rgba(198,240,74,.14);
}
.form-tip{margin-top:12px;font-size:13px;color:var(--cyan)}

/* ===================== 页脚 ===================== */
.site-footer{
  margin-top:44px;
  background:var(--ink-950);
  border-top:1px solid var(--border);
  padding:56px 0 0;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer-col h3{font-size:15px;font-weight:600;margin-bottom:16px;color:var(--text)}
.footer-col p,.footer-col a{font-size:14px;color:var(--text-2);line-height:1.9}
.footer-col a:hover{color:var(--lime)}
.footer-col li{margin-bottom:6px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{max-width:32em}
.footer-brand .tag-chip{margin-top:16px}
.footer-divider{border-left:1px solid var(--border)}
.footer-bottom{
  margin-top:40px;padding:22px 0;
  border-top:1px solid var(--border);
  display:flex;flex-wrap:wrap;gap:8px 24px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);font-family:var(--font-num);
}
.footer-bottom a:hover{color:var(--lime)}

/* ===================== 移动端底部下载条 ===================== */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  display:none;align-items:center;gap:12px;
  padding:12px 16px;
  background:rgba(8,13,24,.94);
  border-top:1px solid var(--border);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  transform:translateY(110%);
  transition:transform .3s ease-out;
}
.mobile-bar.is-show{transform:translateY(0)}
.mobile-bar .btn{flex:1}
.mobile-bar .close-x{
  width:38px;height:38px;flex:0 0 38px;border-radius:var(--r-pill);
  border:1px solid var(--border);display:flex;align-items:center;justify-content:center;
  color:var(--text-2);
}

/* ===================== 进入视口动效 ===================== */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease-out,transform .4s ease-out}
.reveal.is-in{opacity:1;transform:none}

/* ===================== 响应式 ===================== */
@media (min-width:1024px){
  .section{padding:88px 0 0}
  .section:last-of-type{padding-bottom:88px}
  .section-lg{padding-top:88px}
}
@media (max-width:1023px){
  .nav-chips{display:none}
  .nav-toggle{display:flex}
  .nav-strip{display:block;border-top:1px solid var(--border)}
  .header-inner{padding-top:10px;padding-bottom:10px}
  .hero{padding:36px 0 56px}
  .hero-side{margin-top:40px}
  .review-wall{columns:2}
  .news-grid{grid-template-columns:1fr}
  .subscribe{grid-template-columns:1fr;gap:22px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-divider{border-left:0}
  .spec-list{grid-template-columns:1fr}
  .mobile-bar{display:flex}
}
@media (max-width:639px){
  .section{padding:48px 0 0}
  .section:last-of-type{padding-bottom:48px}
  .hero{padding:28px 0 48px}
  .hero-panel{padding:20px}
  .hero-cta .btn{width:100%}
  .bento{gap:16px}
  .bento-card{padding:22px}
  .review-wall{columns:1}
  .news-card{grid-template-columns:1fr}
  .news-thumb img{aspect-ratio:16/9}
  .dl-panel{grid-template-columns:1fr;padding:24px;gap:26px}
  .qr-wrap{justify-self:start;text-align:left}
  .sub-form{flex-direction:column}
  .sub-form .btn{width:100%}
  .spec-key{flex:0 0 96px;font-size:13px}
  .orbit-previous,.orbit-next{display:none}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .mobile-bar{padding-bottom:calc(12px + env(safe-area-inset-bottom))}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --ink-950:#080D18;
  --ink-900:#0C1424;
  --ink-800:#121C30;
  --ink-700:#18253D;
  --brand:#2E4A8F;
  --cyber:#2FD4C0;
  --lime:#C6F04A;
  --text:#E7ECF5;
  --text-2:#9AA7BD;
  --text-3:#6B7891;
  --line:rgba(255,255,255,.10);
  --glass:rgba(255,255,255,.05);
  --r-card:16px;
  --r-panel:20px;
  --r-img:12px;
  --r-btn:12px;
  --r-chip:999px;
  --sh-card:0 10px 30px rgba(0,0,0,.35);
  --sh-lift:0 18px 44px rgba(0,0,0,.45);
  --glow:0 0 0 1px rgba(198,240,74,.35),0 10px 30px rgba(198,240,74,.18);
  --glow-hover:0 0 0 1px rgba(198,240,74,.6),0 14px 38px rgba(198,240,74,.26);
  --sec:88px;
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--ink-900);
  background-image:
    radial-gradient(900px 460px at 10% -10%,rgba(47,212,192,.10),transparent 62%),
    radial-gradient(760px 420px at 92% 0%,rgba(46,74,143,.26),transparent 64%);
  background-repeat:no-repeat;
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  min-height:100vh;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s ease-out,border-color .18s ease-out,opacity .18s ease-out}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.3}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
figure{margin:0}
::selection{background:rgba(198,240,74,.28);color:#fff}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1320px}}
@media (max-width:639px){.container{padding:0 16px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(8,13,24,.74);
  backdrop-filter:blur(12px) saturate(130%);
  -webkit-backdrop-filter:blur(12px) saturate(130%);
  border-bottom:1px solid transparent;
  transition:background .2s ease-out,border-color .2s ease-out;
}
.site-header.is-scrolled{background:rgba(8,13,24,.94);border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;gap:24px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--text);white-space:nowrap}
.logo-mark{
  width:26px;height:26px;border-radius:8px;flex:0 0 26px;
  background:linear-gradient(135deg,var(--cyber),var(--brand));
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.16);
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;left:9px;top:7px;
  width:0;height:0;border-left:9px solid rgba(12,20,36,.92);
  border-top:6px solid transparent;border-bottom:6px solid transparent;
}
.nav-chips{display:flex;align-items:center;gap:8px;margin-left:8px}
.nav-chip{
  font-size:14px;padding:8px 16px;border-radius:var(--r-chip);
  color:var(--text-2);border:1px solid transparent;
  transition:color .18s ease-out,background .18s ease-out,border-color .18s ease-out;
}
.nav-chip:hover{color:var(--text);background:rgba(255,255,255,.06)}
.nav-chip.is-active{color:var(--lime);border-color:rgba(198,240,74,.35);background:rgba(198,240,74,.08)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.menu-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.menu-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .2s ease-out,opacity .2s ease-out}
.menu-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-toggle.is-open span:nth-child(2){opacity:0}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:rgba(8,13,24,.98)}
.mobile-drawer.is-open{display:block}
.mobile-drawer .drawer-inner{padding:10px 0 18px}
.mobile-drawer a{display:block;padding:12px 0;font-size:15px;color:var(--text-2);border-bottom:1px solid rgba(255,255,255,.06)}
.mobile-drawer a:hover{color:var(--lime)}
.mobile-drawer .btn{margin-top:16px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1.2;
  padding:13px 26px;border-radius:var(--r-btn);border:1px solid transparent;
  transition:transform .18s ease-out,box-shadow .18s ease-out,filter .18s ease-out,background .18s ease-out,color .18s ease-out,border-color .18s ease-out;
  white-space:nowrap;
}
.btn-primary{background:var(--lime);color:#0B1220;box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06);box-shadow:var(--glow-hover);color:#0B1220}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-primary:disabled{opacity:.45;transform:none;box-shadow:none;cursor:not-allowed}
.btn-outline{background:transparent;border-color:rgba(46,74,143,.95);color:var(--text)}
.btn-outline:hover{transform:translateY(-2px);border-color:var(--cyber);color:var(--cyber)}
.btn-outline:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--text-2);padding-left:4px;padding-right:4px}
.btn-ghost:hover{color:var(--lime);text-decoration:underline;text-underline-offset:4px}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-block{width:100%;min-width:0}
.btn:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:6px}

/* ---------- Chips ---------- */
.chip{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;
  padding:6px 14px;border-radius:var(--r-chip);
  border:1px solid rgba(47,212,192,.32);color:var(--cyber);background:rgba(47,212,192,.08);
}
.chip.is-dim{border-color:var(--line);color:var(--text-3);background:transparent}
.tag-chip{display:inline-flex;align-items:center;font-size:13px;padding:6px 14px;border-radius:var(--r-chip);border:1px solid var(--line);color:var(--text-2)}
.tag-chip.is-dim{color:var(--text-3)}

/* ---------- Breadcrumb ---------- */
.breadcrumb{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-size:13.5px;color:var(--text-3);padding:28px 0 0;
}
.breadcrumb a:hover{color:var(--cyber)}
.breadcrumb .sep{color:#3A4763}
.breadcrumb .current{color:var(--text-2);max-width:54ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- Article layout ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:56px;
  padding-top:34px;padding-bottom:var(--sec);
}
.article-head{padding-bottom:26px;border-bottom:1px solid var(--line);margin-bottom:34px}
.article-kicker{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:20px}
.article-title{font-size:clamp(28px,3.6vw,42px);line-height:1.25;margin-bottom:18px}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 22px;font-size:13.5px;color:var(--text-3)}
.article-meta i{color:var(--cyan);margin-right:6px;font-size:12px}

/* ---------- Mobile TOC ---------- */
.toc-mobile{display:none;background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-card);padding:16px 20px;margin-bottom:30px;box-shadow:var(--sh-card)}
.toc-mobile summary{cursor:pointer;font-size:15px;font-weight:600;list-style:none;display:flex;align-items:center;justify-content:space-between}
.toc-mobile summary::-webkit-details-marker{display:none}
.toc-mobile summary::after{content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;color:var(--text-3);transition:transform .2s ease-out}
.toc-mobile[open] summary::after{transform:rotate(180deg)}
.toc-mobile[open] summary{margin-bottom:14px}

/* ---------- Article body ---------- */
.article-body{max-width:800px;font-size:17px;line-height:1.9;color:#DCE3F0}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  font-size:clamp(22px,2.2vw,28px);line-height:1.35;
  margin:48px 0 18px;padding-left:16px;border-left:3px solid var(--lime);
  box-shadow:-6px 0 18px -8px rgba(198,240,74,.75);
}
.article-body h3{font-size:20px;line-height:1.4;margin:34px 0 12px;font-weight:600}
.article-body a{color:var(--cyber);border-bottom:1px solid rgba(47,212,192,.35)}
.article-body a:hover{color:var(--lime);border-bottom-color:var(--lime)}
.article-body strong{color:#fff;font-weight:600}
.article-body img{border-radius:var(--r-img);margin:26px 0 8px;width:100%}
.article-body figcaption,.article-body .wp-caption-text,.article-body .caption{font-size:13px;color:var(--text-3);text-align:center;margin:0 0 26px;line-height:1.6}
.article-body blockquote{
  margin:28px 0;padding:22px 26px;border-left:3px solid var(--cyber);
  border-radius:12px;background:var(--glass);
  backdrop-filter:blur(14px) saturate(130%);-webkit-backdrop-filter:blur(14px) saturate(130%);
  color:#D7E0EF;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body ul,.article-body ol{margin:0 0 1.3em}
.article-body ul li,.article-body ol li{position:relative;padding-left:28px;margin-bottom:10px}
.article-body ul li::before{
  content:"";position:absolute;left:7px;top:.78em;width:7px;height:7px;
  border-radius:2px;background:var(--cyber);
}
.article-body ol{counter-reset:artitem}
.article-body ol li{counter-increment:artitem}
.article-body ol li::before{
  content:counter(artitem);position:absolute;left:0;top:.42em;
  width:20px;height:20px;border-radius:var(--r-chip);
  border:1px solid rgba(47,212,192,.5);color:var(--cyber);
  font-size:12px;line-height:18px;text-align:center;font-family:var(--font-num);
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:34px 0}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
.article-body th{color:var(--text-2);font-weight:600}
.article-body code{background:rgba(255,255,255,.07);padding:2px 6px;border-radius:6px;font-size:14px;font-family:var(--font-num);color:var(--lime)}

/* ---------- Empty state ---------- */
.article-empty{
  border:1px dashed rgba(255,255,255,.18);border-radius:var(--r-panel);
  padding:52px 32px;text-align:center;background:rgba(255,255,255,.02);
}
.article-empty h1{font-size:clamp(24px,3vw,32px);margin-bottom:14px}
.article-empty p{color:var(--text-2);max-width:52ch;margin:0 auto 26px}

/* ---------- Article actions ---------- */
.article-actions{
  display:flex;flex-wrap:wrap;align-items:center;gap:16px;
  margin-top:52px;padding-top:28px;border-top:1px solid var(--line);
}

/* ---------- Sidebar ---------- */
.article-side{display:flex;flex-direction:column;gap:20px}
@media (min-width:1024px){.article-side{position:sticky;top:96px;align-self:start}}
.side-card{background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-card);padding:22px 22px 24px;box-shadow:var(--sh-card)}
.side-title{display:flex;align-items:center;gap:8px;font-size:15px;margin-bottom:16px}
.side-title::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--lime);display:block}
.toc-list li{margin-bottom:10px}
.toc-list a{display:block;font-size:14px;color:var(--text-2);padding-left:12px;border-left:1px solid var(--line);line-height:1.6}
.toc-list a:hover{color:var(--lime);border-left-color:var(--lime)}
.toc-empty{font-size:13.5px;color:var(--text-3)}
.side-links li{padding:12px 0;border-bottom:1px dashed var(--line)}
.side-links li:last-child{border-bottom:0;padding-bottom:0}
.side-links a{display:block;font-size:14.5px;color:var(--text-2)}
.side-links a:hover{color:var(--cyber)}
.side-links .meta{font-size:12.5px;color:var(--text-3);margin-top:4px}
.cta-card{background:linear-gradient(150deg,var(--ink-700),var(--ink-800))}
.cta-card p{font-size:14px;color:var(--text-2);margin:0 0 18px}

/* ---------- Related ---------- */
.related{margin-top:72px}
.related > h2{font-size:clamp(22px,2.2vw,28px);margin-bottom:24px;padding-left:16px;border-left:3px solid var(--lime);box-shadow:-6px 0 18px -8px rgba(198,240,74,.75)}
.rel-list{display:grid;gap:18px}
.rel-card{
  display:grid;grid-template-columns:180px minmax(0,1fr);gap:20px;align-items:center;
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-card);
  padding:16px;transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-lift);border-color:rgba(47,212,192,.35)}
.rel-thumb{border-radius:var(--r-img);overflow:hidden;aspect-ratio:16/9;background:var(--ink-700)}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}
.rel-card:hover .rel-thumb img{transform:scale(1.03)}
.rel-body h3{font-size:17px;line-height:1.45;margin-bottom:8px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.rel-card:hover .rel-body h3{color:var(--cyan)}
.rel-body p{font-size:14px;color:var(--text-2);margin:0 0 10px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.rel-meta{font-size:12.5px;color:var(--text-3)}

/* ---------- CTA panel ---------- */
.cta-section{padding-bottom:var(--sec)}
.download-panel{
  position:relative;overflow:hidden;background-color:var(--ink-800);
  border:1px solid var(--line);border-radius:var(--r-panel);
  padding:40px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:36px;align-items:center;
  box-shadow:var(--sh-card);
}
.download-panel::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(120deg,rgba(12,20,36,.95),rgba(12,20,36,.88) 55%,rgba(46,74,143,.55)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.download-panel > *{position:relative;z-index:1}
.download-panel h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:12px}
.download-panel p{color:var(--text-2);font-size:15px;max-width:52ch;margin-bottom:22px}
.dl-actions{display:flex;flex-wrap:wrap;gap:12px}
.qr-box{
  width:140px;height:140px;border:1px dashed rgba(255,255,255,.24);border-radius:var(--r-card);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  background:rgba(255,255,255,.03);color:var(--text-3);font-size:12.5px;text-align:center;
}
.qr-box i{font-size:22px;color:var(--cyber)}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--ink-950);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-col h3{font-size:15px;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px;font-size:14px;color:var(--text-2)}
.footer-col ul li a:hover{color:var(--lime)}
.footer-brand p{font-size:14px;color:var(--text-2);margin:16px 0 16px;max-width:36ch}
.footer-divider{border-left:1px solid var(--line);padding-left:32px}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}

/* ---------- Responsive ---------- */
@media (max-width:1023px){
  :root{--sec:64px}
  .nav-chips{display:none}
  .menu-toggle{display:flex}
  .header-cta{display:none}
  .article-layout{grid-template-columns:1fr;gap:44px;padding-bottom:64px}
  .toc-mobile{display:block}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-divider{border-left:0;padding-left:0}
  .download-panel{grid-template-columns:1fr;padding:32px}
  .qr-box{width:120px;height:120px}
}
@media (max-width:639px){
  :root{--sec:48px}
  .article-title{font-size:26px}
  .article-body{font-size:16.5px;line-height:1.85}
  .rel-card{grid-template-columns:1fr;padding:14px}
  .rel-thumb{aspect-ratio:16/9}
  .related{margin-top:56px}
  .article-actions .btn{width:100%}
  .dl-actions{flex-direction:column}
  .dl-actions .btn{width:100%;min-width:0}
  .footer-grid{grid-template-columns:1fr}
  .breadcrumb .current{max-width:100%;white-space:normal}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;animation-iteration-count:1 !important}
}

/* roulang page: category1 */
:root{
  --ink-950:#080D18;
  --ink-900:#0C1424;
  --ink-800:#121C30;
  --ink-700:#18253D;
  --brand:#2E4A8F;
  --brand-soft:rgba(46,74,143,.28);
  --cyan:#2FD4C0;
  --cyan-soft:rgba(47,212,192,.16);
  --lime:#C6F04A;
  --lime-soft:rgba(198,240,74,.18);
  --text:#E7ECF5;
  --muted:#9AA7BD;
  --faint:#6B7891;
  --border:rgba(255,255,255,.10);
  --border-strong:rgba(255,255,255,.18);
  --glass:rgba(255,255,255,.05);
  --r-card:16px;
  --r-panel:20px;
  --r-img:12px;
  --r-btn:12px;
  --shadow-card:0 10px 30px rgba(0,0,0,.35);
  --shadow-lift:0 18px 44px rgba(0,0,0,.45);
  --shadow-glow:0 0 0 1px rgba(198,240,74,.35),0 10px 30px rgba(198,240,74,.18);
  --shadow-glow-hover:0 0 0 1px rgba(198,240,74,.6),0 14px 38px rgba(198,240,74,.26);
  --container:1200px;
  --step:8px;
}

/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6{
  margin:0 0 16px;
  font-family:inherit;
  color:var(--text);
  letter-spacing:-.01em;
  line-height:1.3;
  font-weight:700;
  text-rendering:optimizeLegibility;
}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.2}
h2{font-size:clamp(24px,2.6vw,34px);line-height:1.3}
h3{font-size:20px;line-height:1.4;font-weight:600}
h4{font-size:17px;line-height:1.5;font-weight:600}
p{margin:0 0 16px;font-size:16px;line-height:1.8}
p:last-child{margin-bottom:0}
a{color:inherit;text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--cyan)}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px}
::selection{background:var(--lime-soft);color:var(--text)}

/* ============ 容器与板块 ============ */
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
@media(min-width:1440px){.container{max-width:1320px}}
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-head{max-width:760px;margin-bottom:48px}
.section-head h2{position:relative;padding-left:18px;margin-bottom:14px}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.14em;bottom:.14em;width:3px;
  border-radius:3px;background:var(--lime);
  box-shadow:0 0 12px rgba(198,240,74,.55);
}
.section-sub{color:var(--muted);font-size:16px;margin:0}
.section-kicker{
  display:inline-block;font-size:13px;letter-spacing:.08em;color:var(--cyan);
  margin-bottom:12px;font-weight:600;
}
.divider{height:1px;background:var(--border);border:0;margin:0}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(12,20,36,.74);
  border-bottom:1px solid transparent;
  transition:background .25s ease-out,border-color .25s ease-out,box-shadow .25s ease-out;
}
.site-header.is-scrolled{
  background:rgba(8,13,24,.86);
  -webkit-backdrop-filter:blur(12px) saturate(130%);
  backdrop-filter:blur(12px) saturate(130%);
  border-bottom-color:var(--border);
  box-shadow:0 12px 34px rgba(0,0,0,.36);
}
.header-inner{display:flex;align-items:center;gap:28px;height:68px}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--text);
  white-space:nowrap;flex:0 0 auto;
}
.logo:hover{color:var(--text)}
.logo-mark{
  width:22px;height:22px;border-radius:7px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--lime),var(--cyan));
  box-shadow:0 0 14px rgba(198,240,74,.35);
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;inset:6px;border-radius:2px;
  background:var(--ink-950);
}
.nav-chips{display:flex;align-items:center;gap:8px;flex:1 1 auto;justify-content:center}
.nav-chip{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border-radius:999px;font-size:14px;font-weight:500;color:var(--muted);
  border:1px solid transparent;white-space:nowrap;
  transition:color .18s ease-out,background .18s ease-out,border-color .18s ease-out,transform .18s ease-out;
}
.nav-chip:hover{color:var(--text);background:rgba(255,255,255,.06);transform:translateY(-1px)}
.nav-chip.is-active{
  color:var(--text);
  background:linear-gradient(180deg,rgba(198,240,74,.16),rgba(47,212,192,.08));
  border-color:rgba(198,240,74,.55);
  box-shadow:0 0 0 1px rgba(198,240,74,.18),0 8px 22px rgba(198,240,74,.14);
}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--border);background:rgba(255,255,255,.04);
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--text);border-radius:2px;transition:transform .2s ease-out,opacity .2s ease-out}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.mobile-chipbar{
  display:none;gap:8px;padding:0 16px 12px;
  overflow-x:auto;white-space:nowrap;
  -ms-overflow-style:none;scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.mobile-chipbar::-webkit-scrollbar{display:none}
.mobile-drawer{
  display:none;flex-direction:column;gap:4px;
  padding:12px 16px 20px;border-top:1px solid var(--border);
  background:rgba(8,13,24,.96);
}
.mobile-drawer.is-open{display:flex}
.mobile-drawer a{
  padding:12px 4px;font-size:16px;font-weight:500;color:var(--muted);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.mobile-drawer a.is-active{color:var(--lime)}
.mobile-drawer a:hover{color:var(--text)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  transition:transform .18s ease-out,box-shadow .18s ease-out,background .18s ease-out,color .18s ease-out,border-color .18s ease-out,filter .18s ease-out;
  white-space:nowrap;cursor:pointer;
}
.btn-sm{min-height:38px;padding:0 18px;font-size:14px}
.btn-primary{
  background:var(--lime);color:#0A121F;
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{
  color:#0A121F;transform:translateY(-2px);filter:brightness(1.06);
  box-shadow:var(--shadow-glow-hover);
}
.btn-primary:active{transform:translateY(0);filter:brightness(.94)}
.btn-outline{
  background:transparent;color:var(--text);border-color:var(--brand);
}
.btn-outline:hover{
  color:var(--text);transform:translateY(-2px);border-color:var(--cyan);
  background:rgba(47,212,192,.08);box-shadow:0 12px 28px rgba(0,0,0,.35);
}
.btn-outline:active{transform:translateY(0);filter:brightness(.94)}
.btn-ghost{
  background:transparent;color:var(--muted);border-color:transparent;
  min-height:auto;padding:0 4px;border-radius:0;
}
.btn-ghost:hover{color:var(--text);text-decoration:underline;text-underline-offset:5px}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}

/* ============ 芯片 / 标签 ============ */
.tag-chip{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:999px;
  font-size:13px;font-weight:500;color:var(--cyan);
  background:var(--cyan-soft);border:1px solid rgba(47,212,192,.28);
  white-space:nowrap;
}
.tag-chip.is-lime{color:var(--lime);background:var(--lime-soft);border-color:rgba(198,240,74,.32)}
.tag-chip.is-dim{color:var(--muted);background:rgba(255,255,255,.05);border-color:var(--border)}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:72px 0 64px;background:var(--ink-950)}
.hero-bg{
  position:absolute;inset:0;
  background-image:linear-gradient(100deg,rgba(8,13,24,.96) 0%,rgba(8,13,24,.82) 42%,rgba(12,20,36,.72) 100%),url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  opacity:.95;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(900px 460px at 82% 12%,rgba(47,212,192,.16),transparent 62%),
             radial-gradient(620px 380px at 8% 88%,rgba(46,74,143,.28),transparent 68%);
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.hero-copy h1{margin:16px 0 18px}
.hero-sub{font-size:17px;color:var(--muted);max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:20px}
.hero-note{font-size:13px;color:var(--faint);letter-spacing:.02em;margin:0}

.glass{
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  backdrop-filter:blur(14px) saturate(130%);
  border:1px solid var(--border);
  border-radius:var(--r-panel);
  position:relative;
}
.glass::before{
  content:"";position:absolute;left:14px;right:14px;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.5),transparent);
}
.hero-panel{padding:28px}
.hero-panel h2{font-size:19px;margin-bottom:6px}
.hero-panel .panel-date{font-size:13px;color:var(--faint);margin-bottom:20px}
.panel-list{display:flex;flex-direction:column;gap:14px}
.panel-list li{display:flex;gap:12px;font-size:15px;color:var(--muted);line-height:1.7}
.panel-list li::before{
  content:"";flex:0 0 auto;width:6px;height:6px;border-radius:50%;
  margin-top:10px;background:var(--cyan);box-shadow:0 0 10px rgba(47,212,192,.6);
}
.panel-foot{
  margin-top:24px;padding-top:16px;border-top:1px solid var(--border);
  font-size:13px;color:var(--faint);
}

/* ============ 数据条 ============ */
.stat-bar{
  position:relative;z-index:2;
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  margin-top:56px;border:1px solid var(--border);border-radius:var(--r-panel);
  overflow:hidden;background:var(--border);
}
.stat-bar div{background:var(--ink-800);padding:18px 20px}
.stat-bar dt{font-size:13px;color:var(--faint);margin-bottom:4px}
.stat-bar dd{margin:0;font-size:19px;font-weight:700;color:var(--text);letter-spacing:-.01em}
.stat-bar dd span{font-size:13px;color:var(--cyan);font-weight:500;margin-left:6px}

/* ============ 分类芯片分段控件 ============ */
.cat-switch{padding:32px 0 0;background:var(--ink-900)}
.switch-bar{
  display:flex;gap:10px;overflow-x:auto;padding:6px;
  border:1px solid var(--border);border-radius:999px;background:var(--ink-800);
  -ms-overflow-style:none;scrollbar-width:none;
}
.switch-bar::-webkit-scrollbar{display:none}
.switch-chip{
  display:inline-flex;align-items:center;justify-content:center;
  height:42px;padding:0 24px;border-radius:999px;font-size:14px;font-weight:500;
  color:var(--muted);border:1px solid transparent;white-space:nowrap;flex:1 1 auto;
  transition:all .18s ease-out;
}
.switch-chip:hover{color:var(--text);background:rgba(255,255,255,.05)}
.switch-chip.is-active{
  color:var(--text);font-weight:600;
  background:linear-gradient(180deg,rgba(198,240,74,.18),rgba(47,212,192,.08));
  border-color:rgba(198,240,74,.6);
  box-shadow:0 0 0 1px rgba(198,240,74,.2),0 10px 26px rgba(198,240,74,.14);
}

/* ============ 时间线 ============ */
.timeline{position:relative;padding-left:36px}
.timeline::before{
  content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,rgba(198,240,74,.7),rgba(47,212,192,.35) 45%,rgba(46,74,143,.25));
  border-radius:2px;
}
.tl-item{position:relative;padding-bottom:32px}
.tl-item:last-child{padding-bottom:0}
.tl-node{
  position:absolute;left:-36px;top:26px;width:16px;height:16px;border-radius:50%;
  background:var(--ink-900);border:2px solid var(--cyan);
  box-shadow:0 0 0 4px rgba(47,212,192,.10),0 0 14px rgba(47,212,192,.45);
}
.tl-item:first-child .tl-node{border-color:var(--lime);box-shadow:0 0 0 5px rgba(198,240,74,.12),0 0 18px rgba(198,240,74,.55)}
.tl-card{
  background:var(--ink-800);border:1px solid var(--border);
  border-radius:var(--r-card);padding:26px 28px;box-shadow:var(--shadow-card);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.tl-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift);border-color:var(--border-strong)}
.tl-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:12px}
.tl-version{
  font-family:Inter,system-ui,sans-serif;font-size:19px;font-weight:700;
  color:var(--lime);letter-spacing:.01em;
}
.tl-meta time{font-size:13px;color:var(--faint);font-family:Inter,system-ui,sans-serif}
.tl-card h3{margin-bottom:14px;font-size:19px}
.tl-list{display:flex;flex-direction:column;gap:10px}
.tl-list li{position:relative;padding-left:18px;font-size:15px;color:var(--muted);line-height:1.75}
.tl-list li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:2px;border-radius:2px;
  background:var(--brand);box-shadow:0 0 0 1px rgba(46,74,143,.4);
}

/* ============ 发布节奏 / 分栏 ============ */
.split{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:start}
.def-list{border-top:1px solid var(--border)}
.def-row{
  display:flex;gap:24px;align-items:flex-start;
  padding:18px 0;border-bottom:1px solid var(--border);
}
.def-row dt{
  flex:0 0 140px;font-size:15px;font-weight:600;color:var(--text);
}
.def-row dd{margin:0;flex:1 1 auto;font-size:15px;color:var(--muted);line-height:1.75}
.figure-card{
  background:var(--ink-800);border:1px solid var(--border);
  border-radius:var(--r-panel);overflow:hidden;box-shadow:var(--shadow-card);
}
.figure-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.figure-card figcaption{padding:18px 22px;font-size:13px;color:var(--faint);line-height:1.7}

.note-strip{
  display:flex;gap:16px;align-items:flex-start;
  margin-top:32px;padding:22px 24px;
  background:linear-gradient(120deg,rgba(47,212,192,.10),rgba(46,74,143,.14));
  border:1px solid rgba(47,212,192,.22);border-radius:var(--r-card);
}
.note-strip .note-icon{
  flex:0 0 auto;width:34px;height:34px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(47,212,192,.16);color:var(--cyan);font-weight:700;font-size:16px;
}
.note-strip p{margin:0;font-size:15px;color:var(--muted)}

/* ============ FAQ（Foundation Accordion 定制） ============ */
.faq-list{--faq-bg:var(--ink-800)}
.accordion{background:transparent;border:0;margin:0;list-style:none}
.accordion .accordion-item{
  border:1px solid var(--border);border-radius:var(--r-card);
  background:var(--ink-800);margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease-out,background .2s ease-out;
}
.accordion .accordion-item:hover{border-color:var(--border-strong)}
.accordion .accordion-item.is-active{
  border-color:rgba(198,240,74,.35);background:var(--ink-700);
}
.accordion .accordion-title{
  position:relative;display:block;padding:20px 58px 20px 24px;
  font-size:16px;font-weight:600;color:var(--text);
  background:transparent;border:0;line-height:1.6;
}
.accordion .accordion-title:hover,.accordion .accordion-title:focus{
  background:transparent;color:var(--lime);
}
.accordion .accordion-title::before{
  content:"";position:absolute;right:26px;top:50%;
  width:9px;height:9px;margin:0;
  border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .25s ease-out,border-color .25s ease-out;
}
.accordion .accordion-item.is-active .accordion-title::before{
  transform:translateY(-30%) rotate(-135deg);border-color:var(--lime);
}
.accordion .accordion-content{
  border:0;background:transparent;color:var(--muted);
  padding:0 24px 22px 24px;font-size:15px;line-height:1.8;
}
.accordion .accordion-content p{margin:0;font-size:15px;color:var(--muted)}

/* ============ 订阅表单 ============ */
.subscribe{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  background:var(--ink-800);border:1px solid var(--border);
  border-radius:var(--r-panel);padding:40px;box-shadow:var(--shadow-card);
}
.subscribe h2{margin-bottom:10px}
.subscribe p{color:var(--muted);font-size:15px;margin:0}
.sub-form{display:flex;gap:12px;flex-wrap:wrap}
.sub-form input[type="email"]{
  flex:1 1 220px;height:48px;padding:0 16px;border-radius:var(--r-btn);
  background:var(--ink-950);border:1px solid var(--border);color:var(--text);
  font-size:15px;transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.sub-form input[type="email"]::placeholder{color:var(--faint)}
.sub-form input[type="email"]:focus{
  outline:none;border-color:var(--lime);
  box-shadow:inset 0 0 0 1px rgba(198,240,74,.35),0 0 18px rgba(198,240,74,.14);
}
.sub-hint{font-size:13px;color:var(--faint);margin-top:12px}

/* ============ CTA 条 ============ */
.cta-bar{
  position:relative;overflow:hidden;
  background:linear-gradient(120deg,#101B30 0%,#0C1424 55%,#121C30 100%);
  border-top:1px solid var(--border);border-bottom:1px solid var(--border);
}
.cta-bar::after{
  content:"";position:absolute;right:-80px;top:-80px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(198,240,74,.16),transparent 62%);
}
.cta-inner{
  position:relative;z-index:2;display:flex;flex-wrap:wrap;
  align-items:center;justify-content:space-between;gap:28px;padding:56px 0;
}
.cta-text h2{margin-bottom:8px}
.cta-text p{color:var(--muted);font-size:15px;margin:0;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-950);border-top:1px solid var(--border);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-col h3{font-size:15px;margin-bottom:18px;color:var(--text)}
.footer-col p{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col ul li a,.footer-col ul li{font-size:14px;color:var(--muted);line-height:1.6}
.footer-col ul li a:hover{color:var(--lime)}
.footer-brand .logo{margin-bottom:16px}
.footer-divider{border-left:1px solid var(--border);padding-left:40px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  margin-top:48px;padding-top:22px;border-top:1px solid var(--border);
  font-size:13px;color:var(--faint);
}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease-out,transform .4s ease-out}
.reveal.is-in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none!important;transition-duration:.01ms!important}
}

/* ============ 响应式 ============ */
@media(max-width:1023px){
  .section{padding:64px 0}
  .section-tight{padding:48px 0}
  .nav-chips{display:none}
  .mobile-chipbar{display:flex}
  .nav-toggle{display:flex}
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero{padding:56px 0 48px}
  .split{grid-template-columns:1fr;gap:36px}
  .subscribe{grid-template-columns:1fr;gap:28px;padding:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-divider{border-left:0;padding-left:0}
  .stat-bar{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:639px){
  .container{padding:0 16px}
  .section{padding:48px 0}
  .section-tight{padding:36px 0}
  .section-head{margin-bottom:32px}
  .header-inner{height:60px;gap:16px}
  .logo{font-size:16px}
  .btn{width:100%}
  .btn-sm{width:auto}
  .header-actions .btn{display:none}
  .hero-actions .btn{width:100%}
  .hero-sub{font-size:16px}
  .hero-panel{padding:22px}
  .timeline{padding-left:26px}
  .timeline::before{left:4px}
  .tl-node{left:-26px;width:12px;height:12px}
  .tl-card{padding:20px}
  .def-row{flex-direction:column;gap:6px}
  .def-row dt{flex:0 0 auto}
  .cta-inner{padding:40px 0}
  .cta-actions{width:100%;flex-direction:column;gap:12px}
  .stat-bar{grid-template-columns:1fr;margin-top:36px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .subscribe{padding:24px}
  .switch-chip{flex:0 0 auto}
  .accordion .accordion-title{padding:18px 52px 18px 18px;font-size:15px}
  .accordion .accordion-content{padding:0 18px 18px 18px}
  .note-strip{flex-direction:column;gap:12px}
}

/* roulang page: category2 */
:root{
  --ink-950:#080D18;
  --ink-900:#0C1424;
  --ink-800:#121C30;
  --ink-700:#18253D;
  --brand:#2E4A8F;
  --cyan:#2FD4C0;
  --lime:#C6F04A;
  --text:#E7ECF5;
  --text-2:#9AA7BD;
  --text-3:#6B7891;
  --border:rgba(255,255,255,.10);
  --glass:rgba(255,255,255,.05);
  --r-card:16px;
  --r-panel:20px;
  --r-img:12px;
  --r-btn:12px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --shadow-hi:0 18px 44px rgba(0,0,0,.45);
  --sec:88px;
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--cyan)}
h1,h2,h3,h4,p,ul,ol,li,figure{margin:0}
ul,ol{padding:0}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.2;font-weight:700;letter-spacing:-.01em}
h2{font-size:clamp(24px,2.6vw,34px);line-height:1.3;font-weight:700;letter-spacing:-.01em}
h3{font-size:20px;line-height:1.4;font-weight:600}
button,.button{font-family:inherit}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--sec) 0}
.section-tight{padding:56px 0}
.section-head{margin-bottom:40px;max-width:760px}
.section-title{position:relative;padding-left:16px}
.section-title::before{
  content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:3px;border-radius:2px;
  background:var(--lime);box-shadow:0 0 12px rgba(198,240,74,.6)
}
.section-sub{margin-top:12px;color:var(--text-2);font-size:15px;max-width:680px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(8,13,24,.72);
  backdrop-filter:blur(12px) saturate(130%);
  -webkit-backdrop-filter:blur(12px) saturate(130%);
  border-bottom:1px solid transparent;
  transition:background .25s ease-out,border-color .25s ease-out,box-shadow .25s ease-out;
}
.site-header.is-scrolled{
  background:rgba(8,13,24,.94);
  border-bottom-color:var(--border);
  box-shadow:0 10px 30px rgba(0,0,0,.45);
}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.logo-mark{
  position:relative;width:26px;height:26px;border-radius:8px;flex:none;
  background:linear-gradient(135deg,var(--cyan),var(--brand));
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.18);
}
.logo-mark::after{
  content:"";position:absolute;inset:8px;border-radius:3px;
  background:var(--lime);transform:rotate(45deg);opacity:.92;
}
.nav-chips{display:flex;align-items:center;gap:6px;flex:1;min-width:0}
.nav-chip{
  padding:8px 14px;border-radius:999px;font-size:14px;font-weight:600;
  color:var(--text-2);border:1px solid transparent;white-space:nowrap;
  transition:color .18s ease-out,background .18s ease-out,border-color .18s ease-out;
}
.nav-chip:hover{color:var(--text);background:rgba(255,255,255,.06)}
.nav-chip.is-active{
  color:var(--lime);background:rgba(198,240,74,.10);
  border-color:rgba(198,240,74,.38);
}
.header-cta{flex:none}
.hamburger{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:var(--r-btn);
  background:var(--ink-800);border:1px solid var(--border);color:var(--text);
  cursor:pointer;font-size:16px;
}
.hamburger:hover{background:var(--ink-700)}
.nav-strip{display:none;border-bottom:1px solid var(--border);background:rgba(8,13,24,.9)}
.nav-strip .strip-track{
  display:flex;gap:8px;overflow-x:auto;padding:10px 24px;
  scrollbar-width:none;-webkit-overflow-scrolling:touch;
}
.nav-strip .strip-track::-webkit-scrollbar{display:none}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:80;
  background:var(--ink-950);border-left:1px solid var(--border);
  padding:24px;transform:translateX(102%);transition:transform .25s ease-out;
  display:flex;flex-direction:column;gap:8px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer a{padding:12px 14px;border-radius:var(--r-btn);color:var(--text-2);font-weight:600;border:1px solid transparent}
.drawer a:hover{background:var(--ink-800);color:var(--text)}
.drawer a.is-active{color:var(--lime);border-color:rgba(198,240,74,.35);background:rgba(198,240,74,.08)}
.drawer-close{background:none;border:1px solid var(--border);border-radius:10px;color:var(--text-2);width:36px;height:36px;cursor:pointer}
.backdrop{
  position:fixed;inset:0;background:rgba(4,8,16,.6);z-index:75;
  opacity:0;pointer-events:none;transition:opacity .25s ease-out;
}
.backdrop.is-open{opacity:1;pointer-events:auto}
@media (max-width:1023px){
  .nav-chips{display:none}
  .hamburger{display:inline-flex}
  .nav-strip{display:block}
  .header-inner{height:64px}
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:12px 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease-out,box-shadow .18s ease-out,background .18s ease-out,color .18s ease-out,border-color .18s ease-out,filter .18s ease-out;
  white-space:nowrap;
}
.btn-primary{
  background:var(--lime);color:#0A1017;
  box-shadow:0 0 0 1px rgba(198,240,74,.35),0 10px 30px rgba(198,240,74,.18);
}
.btn-primary:hover{
  color:#0A1017;transform:translateY(-2px);filter:brightness(1.06);
  box-shadow:0 0 0 1px rgba(198,240,74,.6),0 14px 38px rgba(198,240,74,.26);
}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-secondary{
  background:transparent;color:var(--text);border-color:var(--brand);
}
.btn-secondary:hover{
  color:var(--text);transform:translateY(-2px);border-color:var(--cyan);
  background:rgba(47,212,192,.08);
}
.btn-secondary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--text-2);padding:8px 4px;min-height:auto;text-decoration:none}
.btn-ghost:hover{color:var(--lime);text-decoration:underline}
.btn[disabled],.btn.is-disabled{opacity:.45;transform:none;cursor:not-allowed}
.btn-wide{width:100%;min-width:200px}
.btn-group{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- chips ---------- */
.tag-chip{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
  font-size:13px;font-weight:600;color:var(--cyan);
  background:rgba(47,212,192,.10);border:1px solid rgba(47,212,192,.28);
}
.tag-chip.is-dim{color:var(--text-2);background:rgba(255,255,255,.05);border-color:var(--border)}

/* ---------- hero ---------- */
.page-hero{position:relative;padding:64px 0 56px;overflow:hidden;background:var(--ink-950)}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(90deg,#080D18 0%,rgba(8,13,24,.90) 42%,rgba(8,13,24,.55) 100%),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center right;
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .current{color:var(--text-2)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-lead{margin-top:18px;font-size:18px;color:var(--text-2);max-width:560px}
.hero-actions{margin-top:28px}
.hero-meta{margin-top:20px;font-size:13px;color:var(--text-3);letter-spacing:.02em}
.hero-visual{position:relative}
.hero-visual img{border-radius:var(--r-panel);box-shadow:var(--shadow-hi);aspect-ratio:4/3;object-fit:cover;width:100%}
.glass-panel{
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(130%);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  border:1px solid var(--border);
  border-radius:var(--r-panel);
  box-shadow:var(--shadow);
}
.hero-visual .glass-panel{
  position:absolute;left:-16px;bottom:-24px;width:min(300px,80%);
  padding:18px 20px;
}
.glass-panel h3{font-size:15px;color:var(--text);margin-bottom:10px}
.glass-panel ul{list-style:none;display:grid;gap:8px}
.glass-panel li{display:flex;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-2)}
.glass-panel li strong{color:var(--cyan);font-weight:600}
@media (max-width:1023px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual .glass-panel{position:static;width:100%;margin-top:16px}
}
@media (max-width:640px){
  .page-hero{padding:40px 0 40px}
  .hero-actions .btn{width:100%}
}

/* ---------- category tabs ---------- */
.cat-tabs-wrap{border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:var(--ink-900)}
.cat-tabs{display:flex;gap:10px;overflow-x:auto;padding:18px 0;scrollbar-width:none}
.cat-tabs::-webkit-scrollbar{display:none}
.cat-tab{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;border-radius:999px;font-size:14px;font-weight:600;
  color:var(--text-2);background:var(--ink-800);border:1px solid var(--border);
  white-space:nowrap;transition:all .18s ease-out;
}
.cat-tab:hover{color:var(--text);border-color:rgba(255,255,255,.22)}
.cat-tab.is-active{
  color:var(--lime);background:var(--ink-950);
  border-color:rgba(198,240,74,.6);
  box-shadow:0 0 0 1px rgba(198,240,74,.35),0 10px 30px rgba(198,240,74,.18);
}

/* ---------- steps ---------- */
.steps-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.step-card{
  background:var(--ink-800);border:1px solid var(--border);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--shadow);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.step-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hi);border-color:rgba(47,212,192,.28)}
.steps-grid .step-card:nth-child(even){margin-top:40px}
.step-top{display:flex;align-items:flex-start;gap:18px;margin-bottom:16px}
.step-num{
  font-family:var(--font-num);font-size:clamp(48px,6vw,64px);line-height:.9;font-weight:800;
  color:rgba(231,236,245,.10);letter-spacing:-.03em;flex:none;
}
.step-title-wrap{padding-top:6px}
.step-title-wrap h3{margin-bottom:6px}
.step-card p{color:var(--text-2);font-size:15px}
.step-media{margin-top:20px}
.step-media img{border-radius:var(--r-img);aspect-ratio:16/9;object-fit:cover;width:100%}
.step-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
@media (max-width:1023px){
  .steps-grid{grid-template-columns:1fr}
  .steps-grid .step-card:nth-child(even){margin-top:0}
}
@media (max-width:640px){
  .step-card{padding:22px}
  .step-top{gap:12px}
}

/* ---------- tips ---------- */
.tips-band{background:var(--ink-950);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.tip-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.tip-card{
  background:var(--ink-800);border:1px solid var(--border);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--shadow);transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.tip-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hi)}
.tip-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:12px;margin-bottom:16px;
  color:var(--cyan);background:rgba(47,212,192,.10);border:1px solid rgba(47,212,192,.25);
  font-size:16px;
}
.tip-card h3{margin-bottom:10px}
.tip-card p{color:var(--text-2);font-size:15px}
@media (max-width:1023px){.tip-grid{grid-template-columns:1fr}}

/* ---------- spec list ---------- */
.spec-block{
  background:var(--ink-800);border:1px solid var(--border);border-radius:var(--r-panel);
  padding:8px 28px;box-shadow:var(--shadow);
}
.spec-row{
  display:flex;align-items:center;gap:24px;min-height:48px;padding:12px 0;
  border-bottom:1px solid var(--border);
}
.spec-row:last-child{border-bottom:0}
.spec-key{width:140px;flex:none;color:var(--text-3);font-size:14px}
.spec-val{color:var(--text);font-size:15px}
@media (max-width:640px){
  .spec-block{padding:4px 18px}
  .spec-row{flex-direction:column;align-items:flex-start;gap:4px;padding:14px 0}
  .spec-key{width:auto}
}

/* ---------- faq ---------- */
.faq-accordion{list-style:none;margin:0;padding:0}
.faq-accordion .accordion-item{
  background:var(--ink-800);border:1px solid var(--border);border-radius:14px;
  margin-bottom:12px;overflow:hidden;transition:background .2s ease-out,border-color .2s ease-out;
}
.faq-accordion .accordion-item.is-active{background:var(--ink-700);border-color:rgba(255,255,255,.18)}
.faq-accordion .accordion-title{
  position:relative;display:block;padding:18px 56px 18px 22px;
  font-size:16px;font-weight:600;color:var(--text);background:transparent;
  border:0;
}
.faq-accordion .accordion-title::before{display:none}
.faq-accordion .accordion-title::after{
  content:"";position:absolute;right:24px;top:50%;width:8px;height:8px;
  border-right:2px solid var(--text-2);border-bottom:2px solid var(--text-2);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .22s ease-out,border-color .22s ease-out;
}
.faq-accordion .accordion-item.is-active .accordion-title::after{
  transform:translateY(-30%) rotate(-135deg);border-color:var(--lime);
}
.faq-accordion .accordion-content{
  display:none;padding:0 56px 20px 42px;color:var(--text-2);font-size:15px;
}
.faq-accordion .accordion-item.is-active > .accordion-content{display:block}
@media (max-width:640px){
  .faq-accordion .accordion-title{padding:16px 48px 16px 18px;font-size:15px}
  .faq-accordion .accordion-content{padding:0 20px 18px 20px}
}

/* ---------- cta bar ---------- */
.cta-bar{
  display:grid;grid-template-columns:1.2fr auto;gap:32px;align-items:center;
  background:linear-gradient(120deg,var(--ink-800),var(--ink-700));
  border:1px solid var(--border);border-radius:var(--r-panel);
  padding:40px;box-shadow:var(--shadow-hi);
}
.cta-bar h2{margin-bottom:12px}
.cta-bar p{color:var(--text-2);font-size:15px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}
@media (max-width:1023px){
  .cta-bar{grid-template-columns:1fr;padding:28px}
  .cta-actions{justify-content:flex-start}
  .cta-actions .btn{width:100%}
}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-950);border-top:1px solid var(--border);padding:64px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.footer-brand p{color:var(--text-2);font-size:14px;margin:16px 0 16px;max-width:320px}
.footer-col h3{font-size:15px;font-weight:600;margin-bottom:16px;color:var(--text)}
.footer-col ul{list-style:none;display:grid;gap:10px}
.footer-col li{color:var(--text-2);font-size:14px}
.footer-col a{color:var(--text-2);font-size:14px}
.footer-col a:hover{color:var(--lime)}
.footer-divider{border-left:1px solid var(--border);padding-left:32px}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  margin-top:44px;padding-top:20px;border-top:1px solid var(--border);
  font-size:13px;color:var(--text-3);
}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-divider{border-left:0;padding-left:0}
}
@media (max-width:640px){
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .section{padding:48px 0}
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease-out,transform .4s ease-out}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{transition-duration:.001ms !important}
}

/* roulang page: category3 */
:root{
  --ink-950:#080D18;
  --ink-900:#0C1424;
  --ink-800:#121C30;
  --ink-700:#18253D;
  --brand:#2E4A8F;
  --brand-soft:#3B5CA8;
  --cyan:#2FD4C0;
  --lime:#C6F04A;
  --text:#E7ECF5;
  --text-2:#9AA7BD;
  --text-3:#6B7891;
  --border:rgba(255,255,255,.10);
  --glass:rgba(255,255,255,.05);
  --r-card:16px;
  --r-panel:20px;
  --r-img:12px;
  --r-btn:12px;
  --r-pill:999px;
  --sh-card:0 10px 30px rgba(0,0,0,.35);
  --sh-lift:0 18px 44px rgba(0,0,0,.45);
  --sh-glow:0 0 0 1px rgba(198,240,74,.35),0 10px 30px rgba(198,240,74,.18);
  --sh-glow-hover:0 0 0 1px rgba(198,240,74,.6),0 14px 38px rgba(198,240,74,.26);
  --section-gap:88px;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none;transition:color .18s ease-out,opacity .18s ease-out}
a:hover{color:var(--lime)}
h1,h2,h3,h4,h5,h6,p,ul,ol,figure,blockquote{margin:0}
h1,h2,h3,h4,h5,h6{color:var(--text);font-weight:700;letter-spacing:-0.01em;line-height:1.3}
ul,ol{list-style:none;padding:0}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit}
p{color:var(--text-2)}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:6px}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.section{padding:var(--section-gap) 0}
.section-alt{background:var(--ink-950);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:clamp(24px,2.6vw,34px);position:relative;padding-left:18px}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:4px;
  background:var(--lime);box-shadow:0 0 14px rgba(198,240,74,.55);
}
.section-head p{margin-top:12px;font-size:16px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head.center h2{padding-left:0}
.section-head.center h2::before{display:none}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;letter-spacing:0;
  transition:transform .18s ease-out,box-shadow .18s ease-out,background-color .18s ease-out,color .18s ease-out,filter .18s ease-out;
  white-space:nowrap;
}
.btn-primary{background:var(--lime);color:#0B111F;box-shadow:var(--sh-glow)}
.btn-primary:hover{color:#0B111F;transform:translateY(-2px);filter:brightness(1.06);box-shadow:var(--sh-glow-hover)}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-ghostline{background:transparent;color:var(--text);box-shadow:inset 0 0 0 1px var(--brand)}
.btn-ghostline:hover{color:var(--text);transform:translateY(-2px);box-shadow:inset 0 0 0 1px var(--cyan),0 10px 26px rgba(47,212,192,.14)}
.btn-ghostline:active{transform:translateY(0);filter:brightness(.94)}
.btn-plain{background:transparent;color:var(--text-2);padding:0 4px;min-height:40px}
.btn-plain:hover{color:var(--lime);text-decoration:underline;text-underline-offset:5px}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn-lg{min-height:56px;padding:0 32px;font-size:16px}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;transform:none}
.btn-block{width:100%}

/* ---------- chips / tags ---------- */
.tag-chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:13px;line-height:1.5;font-weight:600;
  color:var(--cyan);background:rgba(47,212,192,.10);
  box-shadow:inset 0 0 0 1px rgba(47,212,192,.28);
}
.tag-chip.is-dim{color:var(--text-2);background:rgba(255,255,255,.05);box-shadow:inset 0 0 0 1px var(--border);font-weight:500}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(12,20,36,.72);
  backdrop-filter:blur(14px) saturate(130%);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  box-shadow:inset 0 -1px 0 var(--border);
  transition:background-color .2s ease-out,box-shadow .2s ease-out;
}
.site-header.is-scrolled{background:rgba(8,13,24,.92);box-shadow:inset 0 -1px 0 rgba(255,255,255,.14),0 10px 30px rgba(0,0,0,.35)}
.header-inner{display:flex;align-items:center;gap:24px;min-height:68px;padding-top:10px;padding-bottom:10px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:-0.01em;color:var(--text);flex-shrink:0}
.logo:hover{color:var(--text)}
.logo-mark{
  width:26px;height:26px;border-radius:9px;flex-shrink:0;
  background:linear-gradient(135deg,var(--cyan),var(--brand) 55%,var(--lime));
  box-shadow:0 0 0 1px rgba(255,255,255,.12),0 6px 18px rgba(47,212,192,.25);
}
.nav-chips{display:flex;align-items:center;gap:8px;margin-left:auto}
.nav-chip{
  display:inline-flex;align-items:center;
  padding:8px 16px;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;color:var(--text-2);
  white-space:nowrap;
  transition:color .18s ease-out,background-color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
}
.nav-chip:hover{color:var(--text);background:rgba(255,255,255,.06);transform:translateY(-1px)}
.nav-chip.is-active{
  color:#0B111F;background:var(--lime);
  box-shadow:0 0 0 1px rgba(198,240,74,.35),0 8px 22px rgba(198,240,74,.20);
}
.nav-chip.is-active:hover{color:#0B111F;background:var(--lime)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{display:none}

/* ---------- breadcrumb ---------- */
.crumb{padding:20px 0 0;font-size:13px;color:var(--text-3)}
.crumb a{color:var(--text-2)}
.crumb span.sep{margin:0 8px;color:var(--text-3)}
.crumb .current{color:var(--text-3)}

/* ---------- category hero ---------- */
.cat-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--border);background:var(--ink-950)}
.cat-hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:0;opacity:.42}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(8,13,24,.96) 0%,rgba(8,13,24,.86) 42%,rgba(12,20,36,.72) 100%);
}
.cat-hero-inner{position:relative;z-index:2;padding:72px 24px 80px;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.cat-hero-text .eyebrow{
  display:inline-block;margin-bottom:16px;padding:6px 14px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;color:var(--lime);background:rgba(198,240,74,.10);
  box-shadow:inset 0 0 0 1px rgba(198,240,74,.30);
}
.cat-hero h1{font-size:clamp(30px,4.4vw,48px);line-height:1.2;font-weight:700}
.cat-hero .lead{margin-top:18px;font-size:17px;line-height:1.8;color:var(--text-2);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-meta{display:flex;flex-wrap:wrap;gap:8px 28px;margin-top:28px;font-size:13px;color:var(--text-3)}
.hero-meta li{display:inline-flex;align-items:center;gap:8px}
.hero-meta li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);flex-shrink:0}
.cat-hero-art{
  border-radius:var(--r-panel);overflow:hidden;position:relative;
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(130%);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  box-shadow:inset 0 0 0 1px var(--border),var(--sh-lift);
  padding:14px;
}
.cat-hero-art::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.42),transparent);
}
.cat-hero-art img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:12px}
.cat-hero-art figcaption{padding:12px 6px 2px;font-size:13px;color:var(--text-3)}

/* ---------- chip segment ---------- */
.chip-segment-wrap{padding:32px 0 0}
.chip-segment{
  display:flex;flex-wrap:wrap;gap:10px;padding:8px;
  border-radius:var(--r-pill);
  background:var(--ink-800);
  box-shadow:inset 0 0 0 1px var(--border);
}
.seg-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;color:var(--text-2);
  background:transparent;box-shadow:inset 0 0 0 1px var(--border);
  transition:color .18s ease-out,background-color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
}
.seg-chip:hover{color:var(--text);transform:translateY(-1px);box-shadow:inset 0 0 0 1px var(--brand-soft)}
.seg-chip.is-active{
  color:var(--text);background:var(--ink-950);
  box-shadow:inset 0 0 0 1px var(--lime),0 0 18px rgba(198,240,74,.28);
}
.seg-chip.is-active:hover{color:var(--text)}

/* ---------- feature rows ---------- */
.feature-row{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding-bottom:72px;
}
.feature-row:last-child{padding-bottom:0}
.feature-row.is-reverse .feature-media{order:2}
.feature-media{position:relative;border-radius:var(--r-panel);overflow:hidden;background:var(--ink-800);box-shadow:var(--sh-card)}
.feature-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;transition:transform .5s ease-out}
.feature-media:hover img{transform:scale(1.03)}
.feature-media .media-index{
  position:absolute;top:14px;left:14px;
  width:38px;height:38px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;color:#0B111F;background:var(--lime);
  box-shadow:0 8px 20px rgba(198,240,74,.25);
}
.feature-body h3{font-size:20px;margin:14px 0 12px}
.feature-body p{font-size:16px}
.dot-list{margin-top:16px;display:grid;gap:10px}
.dot-list li{position:relative;padding-left:22px;font-size:15px;color:var(--text-2)}
.dot-list li::before{
  content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;border-radius:3px;
  background:var(--cyan);box-shadow:0 0 10px rgba(47,212,192,.5);
}
.link-more{display:inline-flex;align-items:center;gap:6px;margin-top:20px;font-size:14px;font-weight:600;color:var(--cyan)}
.link-more::after{content:"→";transition:transform .18s ease-out}
.link-more:hover{color:var(--lime)}
.link-more:hover::after{transform:translateX(4px)}

/* ---------- bento ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:20px}
.bento-card{
  background:var(--ink-800);
  border-radius:var(--r-card);
  padding:28px;
  box-shadow:inset 0 0 0 1px var(--border),var(--sh-card);
  transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.bento-card:hover{transform:translateY(-2px);box-shadow:inset 0 0 0 1px rgba(255,255,255,.16),var(--sh-lift)}
.bento-card.span-7{grid-column:span 7}
.bento-card.span-5{grid-column:span 5}
.bento-card.is-raised{background:var(--ink-700)}
.bento-icon{
  width:40px;height:40px;border-radius:12px;margin-bottom:18px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(47,212,192,.12);box-shadow:inset 0 0 0 1px rgba(47,212,192,.30);
}
.bento-icon svg{width:20px;height:20px;stroke:var(--cyan);fill:none;stroke-width:1.7}
.bento-card h3{font-size:19px;margin-bottom:10px}
.bento-card p{font-size:15px}
.bento-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}

/* ---------- stats strip ---------- */
.stat-strip{
  display:grid;grid-template-columns:repeat(3,1fr);
  background:var(--ink-800);border-radius:var(--r-panel);
  box-shadow:inset 0 0 0 1px var(--border);overflow:hidden;
}
.stat{padding:32px 28px;border-right:1px solid var(--border)}
.stat:last-child{border-right:0}
.stat-num{display:block;font-size:38px;font-weight:700;line-height:1.1;color:var(--lime);font-family:Inter,system-ui,sans-serif}
.stat-label{display:block;margin-top:8px;font-size:15px;color:var(--text-2)}
.stat-note{display:block;margin-top:6px;font-size:13px;color:var(--text-3)}

/* ---------- checklist ---------- */
.check-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px 32px}
.check-item{
  display:flex;gap:14px;padding:20px 22px;border-radius:var(--r-card);
  background:var(--ink-800);box-shadow:inset 0 0 0 1px var(--border);
  transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.check-item:hover{transform:translateY(-2px);box-shadow:inset 0 0 0 1px rgba(47,212,192,.35),var(--sh-card)}
.check-mark{
  flex-shrink:0;width:22px;height:22px;margin-top:4px;border-radius:8px;
  background:rgba(198,240,74,.14);box-shadow:inset 0 0 0 1px rgba(198,240,74,.4);
  display:flex;align-items:center;justify-content:center;
}
.check-mark svg{width:12px;height:12px;stroke:var(--lime);fill:none;stroke-width:2.4}
.check-item h3{font-size:16px;margin-bottom:6px}
.check-item p{font-size:14px;color:var(--text-2)}

/* ---------- FAQ ---------- */
.faq-block{max-width:900px;margin:0 auto}
.accordion{border:0;background:transparent;margin:0}
.accordion .accordion-item{
  background:var(--ink-800);border:0;border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;
  box-shadow:inset 0 0 0 1px var(--border);
  transition:box-shadow .2s ease-out,background-color .2s ease-out;
}
.accordion .accordion-item.is-active{background:var(--ink-700);box-shadow:inset 0 0 0 1px rgba(255,255,255,.16)}
.accordion .accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;border:0;background:transparent;
  font-size:16px;font-weight:600;color:var(--text);line-height:1.6;
}
.accordion .accordion-title:hover{background:transparent;color:var(--text)}
.accordion .accordion-title::before{display:none}
.accordion-title .arrow{
  flex-shrink:0;width:22px;height:22px;position:relative;
  transition:transform .22s ease-out;
}
.accordion-title .arrow::before,
.accordion-title .arrow::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--cyan);border-radius:2px;
}
.accordion-title .arrow::before{width:12px;height:2px;transform:translate(-50%,-50%)}
.accordion-title .arrow::after{width:2px;height:12px;transform:translate(-50%,-50%);transition:opacity .2s ease-out}
.accordion-item.is-active .accordion-title .arrow{transform:rotate(180deg)}
.accordion-item.is-active .accordion-title .arrow::after{opacity:0}
.accordion .accordion-content{padding:0 24px 22px;border:0;background:transparent;color:var(--text-2)}
.accordion .accordion-content p{font-size:15px;line-height:1.8;padding-left:20px}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-panel);
  background:linear-gradient(115deg,var(--ink-800),var(--brand) 140%);
  box-shadow:inset 0 0 0 1px var(--border),var(--sh-lift);
  padding:48px;
  display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center;
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px)}
.cta-band p{margin-top:12px;font-size:16px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.cta-side{display:grid;gap:14px;justify-items:center;text-align:center}
.qr-box{
  width:140px;height:140px;border-radius:16px;
  background:rgba(255,255,255,.06);
  box-shadow:inset 0 0 0 1px var(--border);
  display:flex;align-items:center;justify-content:center;
}
.qr-box svg{width:56px;height:56px;stroke:var(--text-3);fill:none;stroke-width:1.4}
.qr-box span{font-size:12px;color:var(--text-3)}
.cta-side small{font-size:13px;color:var(--text-3);display:block}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-950);border-top:1px solid var(--border);padding:64px 0 28px;margin-top:var(--section-gap)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-col h3{font-size:15px;margin-bottom:16px;color:var(--text)}
.footer-col ul{display:grid;gap:10px}
.footer-col ul li{font-size:14px;color:var(--text-3)}
.footer-col ul li a{color:var(--text-2)}
.footer-col ul li a:hover{color:var(--lime)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:var(--text-3);max-width:340px}
.footer-brand .tag-chip{margin-top:18px}
.footer-divider{border-left:1px solid var(--border);padding-left:32px}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid var(--border);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease-out,transform .4s ease-out}
.reveal.is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (min-width:1440px){
  :root{--container:1320px}
}
@media (max-width:1023px){
  :root{--section-gap:64px}
  .header-inner{flex-wrap:wrap;gap:12px 16px}
  .nav-chips{
    order:3;width:100%;margin-left:0;flex-wrap:nowrap;
    overflow-x:auto;-webkit-overflow-scrolling:touch;
    padding-bottom:6px;margin-bottom:2px;
    scrollbar-width:none;
  }
  .nav-chips::-webkit-scrollbar{display:none}
  .header-actions{margin-left:auto}
  .cat-hero-inner{grid-template-columns:1fr;gap:36px;padding:56px 24px 64px}
  .cat-hero-art{max-width:640px}
  .feature-row{gap:36px;padding-bottom:64px}
  .bento-card.span-7,.bento-card.span-5{grid-column:span 6}
  .cta-band{grid-template-columns:1fr;padding:40px}
  .cta-side{justify-items:start;text-align:left}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 24px}
  .footer-divider{border-left:0;padding-left:0}
  .footer-brand{grid-column:span 2}
}
@media (max-width:767px){
  .stat-strip{grid-template-columns:1fr}
  .stat{border-right:0;border-bottom:1px solid var(--border)}
  .stat:last-child{border-bottom:0}
  .check-grid{grid-template-columns:1fr}
}
@media (max-width:639px){
  :root{--section-gap:48px}
  .container{padding:0 16px}
  .cat-hero-inner{padding:44px 16px 52px}
  .header-actions .btn-primary{display:none}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .feature-row{grid-template-columns:1fr;gap:24px;padding-bottom:48px}
  .feature-row.is-reverse .feature-media{order:0}
  .bento-card.span-7,.bento-card.span-5{grid-column:span 12}
  .chip-segment{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;border-radius:16px}
  .chip-segment::-webkit-scrollbar{display:none}
  .seg-chip{flex-shrink:0}
  .cta-band{padding:28px 22px}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
  .accordion .accordion-title{padding:16px 18px;font-size:15px}
  .accordion .accordion-content{padding:0 18px 18px}
  .accordion .accordion-content p{padding-left:0}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:span 1}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* roulang page: category4 */
/* ============ 设计变量 ============ */
:root{
  --ink-950:#080D18;
  --ink-900:#0C1424;
  --ink-800:#121C30;
  --ink-700:#18253D;
  --brand:#2E4A8F;
  --cyan:#2FD4C0;
  --lime:#C6F04A;
  --text:#E7ECF5;
  --text-2:#9AA7BD;
  --text-3:#6B7891;
  --border:rgba(255,255,255,.10);
  --border-strong:rgba(255,255,255,.18);
  --glass:rgba(255,255,255,.05);
  --r-card:16px;
  --r-panel:20px;
  --r-img:12px;
  --r-btn:12px;
  --r-pill:999px;
  --shadow-card:0 10px 30px rgba(0,0,0,.35);
  --shadow-hover:0 18px 44px rgba(0,0,0,.45);
  --shadow-lime:0 0 0 1px rgba(198,240,74,.35),0 10px 30px rgba(198,240,74,.18);
  --shadow-lime-hover:0 0 0 1px rgba(198,240,74,.6),0 14px 38px rgba(198,240,74,.26);
  --sp-1:8px; --sp-2:16px; --sp-3:24px; --sp-4:32px; --sp-5:48px; --sp-6:88px;
  --container:1200px;
}

/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--cyan);text-decoration:none;transition:color .18s ease-out;}
a:hover{color:var(--lime);}
ul,ol,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3{letter-spacing:-.01em;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{background:none;border:0;padding:0;cursor:pointer;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}
::selection{background:rgba(198,240,74,.3);}

/* ============ 容器与通用排版 ============ */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:var(--sp-6) 0;}
.section-tight{padding:56px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-title{
  position:relative;
  padding-left:16px;
  font-size:clamp(24px,2.6vw,34px);
  line-height:1.3;
  font-weight:700;
}
.section-title::before{
  content:"";
  position:absolute;left:0;top:.16em;bottom:.16em;width:3px;border-radius:var(--r-pill);
  background:var(--lime);
  box-shadow:0 0 12px rgba(198,240,74,.55);
}
.section-lead{margin-top:12px;color:var(--text-2);font-size:15px;line-height:1.8;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--cyan);
  letter-spacing:.04em;text-transform:none;margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--cyan);opacity:.7;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 26px;min-height:48px;
  border-radius:var(--r-btn);border:1px solid transparent;
  cursor:pointer;text-align:center;
  transition:transform .18s ease-out,box-shadow .18s ease-out,filter .18s ease-out,background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.btn-primary{
  background:var(--lime);color:var(--ink-950);
  box-shadow:var(--shadow-lime);
}
.btn-primary:hover{
  color:var(--ink-950);
  transform:translateY(-2px);
  filter:brightness(1.06);
  box-shadow:var(--shadow-lime-hover);
}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);}
.btn-secondary{
  background:transparent;color:var(--text);
  border-color:rgba(46,74,143,.95);
}
.btn-secondary:hover{
  color:var(--text);
  transform:translateY(-2px);
  background:rgba(46,74,143,.22);
  border-color:rgba(47,212,192,.6);
}
.btn-secondary:active{transform:translateY(0);filter:brightness(.96);}
.btn-ghost{
  background:transparent;color:var(--text-2);padding-left:2px;padding-right:2px;min-height:auto;
  border-bottom:1px solid transparent;border-radius:0;
}
.btn-ghost:hover{color:var(--lime);border-bottom-color:var(--lime);}
.btn-sm{padding:10px 18px;min-height:40px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;}

/* ============ 标签 / 芯片 ============ */
.tag-chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;
  background:rgba(47,212,192,.12);
  color:var(--cyan);
  border:1px solid rgba(47,212,192,.28);
}
.tag-chip.is-dim{
  background:rgba(255,255,255,.04);
  color:var(--text-2);
  border-color:var(--border);
}
.tag-chip.is-lime{
  background:rgba(198,240,74,.12);
  color:var(--lime);
  border-color:rgba(198,240,74,.32);
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(12,20,36,.72);
  backdrop-filter:blur(14px) saturate(130%);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  border-bottom:1px solid transparent;
  transition:background-color .25s ease-out,border-color .25s ease-out;
}
.site-header.is-scrolled{
  background:rgba(8,13,24,.9);
  border-bottom-color:var(--border);
}
.header-inner{
  display:flex;align-items:center;gap:24px;
  min-height:68px;
}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--text);font-weight:700;font-size:16px;letter-spacing:-.01em;
  flex:0 0 auto;
}
.logo:hover{color:var(--text);}
.logo-mark{
  position:relative;width:28px;height:28px;border-radius:9px;
  background:linear-gradient(135deg,var(--cyan),var(--brand));
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.22),0 6px 16px rgba(47,212,192,.25);
}
.logo-mark::after{
  content:"";position:absolute;inset:8px;border-radius:3px;
  border:2px solid rgba(8,13,24,.85);
  transform:rotate(45deg);
}
.nav-chips{
  display:flex;align-items:center;gap:6px;
  margin:0 auto;
  padding:5px;border-radius:var(--r-pill);
  background:var(--glass);
  border:1px solid var(--border);
  backdrop-filter:blur(14px) saturate(130%);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
}
.nav-chip{
  display:inline-flex;align-items:center;
  padding:8px 16px;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;color:var(--text-2);
  border:1px solid transparent;
  white-space:nowrap;
  transition:color .18s ease-out,background-color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.nav-chip:hover{color:var(--text);background:rgba(255,255,255,.06);}
.nav-chip.is-active{
  color:var(--text);
  background:var(--ink-800);
  border-color:rgba(198,240,74,.45);
  box-shadow:0 0 0 1px rgba(198,240,74,.14),0 8px 20px rgba(198,240,74,.12);
}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--border);background:var(--glass);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{
  display:block;width:18px;height:2px;border-radius:2px;background:var(--text);
  transition:transform .2s ease-out,opacity .2s ease-out;
}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.chip-strip{display:none;border-top:1px solid var(--border);}
.chip-strip .strip-inner{
  display:flex;gap:8px;overflow-x:auto;
  padding:10px 16px;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.chip-strip .strip-inner::-webkit-scrollbar{display:none;}
.mobile-drawer{
  display:none;padding:14px 16px 22px;
  background:rgba(8,13,24,.97);
  border-top:1px solid var(--border);
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer .drawer-links{display:grid;gap:8px;margin-bottom:14px;}
.mobile-drawer .nav-chip{justify-content:flex-start;width:100%;padding:12px 16px;border-color:var(--border);}
.mobile-drawer .nav-chip.is-active{border-color:rgba(198,240,74,.45);}

/* ============ Hero ============ */
.cat-hero{
  position:relative;overflow:hidden;
  padding:56px 0 64px;
  background:linear-gradient(180deg,rgba(8,13,24,.94),rgba(12,20,36,.98));
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center right;
  opacity:.16;pointer-events:none;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(720px 320px at 18% 12%,rgba(47,212,192,.16),transparent 62%),
             linear-gradient(90deg,rgba(8,13,24,.92) 0%,rgba(8,13,24,.6) 52%,rgba(8,13,24,.86) 100%);
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;
}
.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);margin-bottom:18px;
}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--lime);}
.breadcrumb .sep{color:var(--text-3);opacity:.7;}
.breadcrumb .current{color:var(--text-3);}
.cat-hero h1{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.2;font-weight:700;
  letter-spacing:-.01em;
}
.cat-hero h1 .accent{
  display:block;
  font-size:clamp(20px,2vw,26px);
  font-weight:700;
  color:var(--cyan);
  margin-top:10px;
  letter-spacing:0;
}
.hero-lead{
  margin-top:20px;max-width:560px;
  font-size:16px;color:var(--text-2);line-height:1.85;
}
.hero-actions{
  display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;
}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:8px;margin-top:22px;
}
.hero-meta span{
  font-size:13px;color:var(--text-3);
  padding:6px 12px;border-radius:var(--r-pill);
  border:1px solid var(--border);background:rgba(255,255,255,.03);
}
.hero-visual{
  position:relative;
  border-radius:var(--r-panel);
  padding:10px;
  background:var(--glass);
  border:1px solid var(--border);
  backdrop-filter:blur(14px) saturate(130%);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  box-shadow:var(--shadow-card);
}
.hero-visual .media-frame{
  aspect-ratio:4/3;border-radius:var(--r-img);overflow:hidden;background:var(--ink-800);
}
.hero-visual img{width:100%;height:100%;object-fit:cover;}
.hero-visual .visual-caption{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 6px 4px;
  font-size:13px;color:var(--text-2);
}

/* ============ 分类芯片分段控件 ============ */
.cat-switch-wrap{padding:40px 0 8px;}
.cat-switch{
  display:flex;gap:8px;flex-wrap:wrap;
  padding:10px;border-radius:var(--r-panel);
  background:var(--ink-800);
  border:1px solid var(--border);
  box-shadow:var(--shadow-card);
}
.cat-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 20px;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;color:var(--text-2);
  border:1px solid var(--border);
  background:rgba(255,255,255,.02);
  transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
}
.cat-pill:hover{
  color:var(--text);
  transform:translateY(-2px);
  border-color:rgba(47,212,192,.5);
}
.cat-pill.is-active{
  color:var(--text);
  background:var(--ink-950);
  border-color:rgba(198,240,74,.5);
  box-shadow:0 0 0 1px rgba(198,240,74,.16),0 10px 26px rgba(198,240,74,.14);
}
.cat-pill.is-active::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--lime);box-shadow:0 0 10px rgba(198,240,74,.8);
}

/* ============ 规格定义列表 ============ */
.spec-block{
  border-radius:var(--r-panel);
  background:var(--ink-800);
  border:1px solid var(--border);
  padding:8px 28px 12px;
  box-shadow:var(--shadow-card);
}
.spec-list{border-top:0;}
.spec-row{
  display:grid;grid-template-columns:170px 1fr;gap:24px;align-items:center;
  min-height:48px;padding:16px 0;
  border-bottom:1px solid var(--border);
}
.spec-row:last-child{border-bottom:0;}
.spec-row dt{
  color:var(--text-2);font-size:14px;font-weight:600;letter-spacing:.02em;
}
.spec-row dd{
  color:var(--text);font-size:15px;
}
.spec-row dd .hint{color:var(--text-3);font-size:13px;display:block;margin-top:2px;}
.spec-note{
  margin-top:20px;font-size:13px;color:var(--text-3);
  display:flex;align-items:flex-start;gap:8px;
}
.spec-note::before{
  content:"";width:6px;height:6px;margin-top:9px;border-radius:50%;
  background:var(--cyan);flex:0 0 auto;
}

/* ============ 自检面板 ============ */
.check-panel{
  display:grid;grid-template-columns:5fr 7fr;gap:32px;align-items:center;
  padding:28px;border-radius:var(--r-panel);
  background:var(--ink-800);
  border:1px solid var(--border);
  box-shadow:var(--shadow-card);
}
.check-media{
  border-radius:var(--r-img);overflow:hidden;
  aspect-ratio:4/3;background:var(--ink-700);
  border:1px solid var(--border);
}
.check-media img{width:100%;height:100%;object-fit:cover;}
.check-copy h3{font-size:20px;font-weight:600;margin-bottom:10px;}
.check-copy p{font-size:15px;color:var(--text-2);margin-bottom:20px;}
.check-list{display:grid;gap:12px;}
.check-item{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 16px;border-radius:12px;
  background:var(--ink-700);
  border:1px solid var(--border);
  transition:transform .18s ease-out,border-color .18s ease-out;
}
.check-item:hover{transform:translateY(-2px);border-color:rgba(47,212,192,.4);}
.check-item .tick{
  flex:0 0 auto;width:22px;height:22px;margin-top:3px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(47,212,192,.14);
  border:1px solid rgba(47,212,192,.4);
}
.check-item .tick svg{width:12px;height:12px;stroke:var(--cyan);}
.check-item strong{display:block;font-size:15px;font-weight:600;}
.check-item span{display:block;font-size:13px;color:var(--text-3);line-height:1.7;}

/* ============ FAQ 手风琴 ============ */
.faq-wrap{max-width:900px;}
.faq-accordion.accordion{
  background:transparent;border:0;
}
.faq-accordion .accordion-item{
  background:var(--ink-800);
  border:1px solid var(--border);
  border-radius:var(--r-card);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .18s ease-out,background-color .18s ease-out;
}
.faq-accordion .accordion-item.is-active{
  background:var(--ink-700);
  border-color:var(--border-strong);
}
.faq-accordion .accordion-title{
  position:relative;
  display:block;
  padding:20px 60px 20px 24px;
  background:transparent;
  border:0;
  color:var(--text);
  font-size:16px;
  font-weight:600;
  line-height:1.6;
  transition:color .18s ease-out;
}
.faq-accordion .accordion-title:hover,
.faq-accordion .accordion-title:focus{
  background:transparent;
  color:var(--lime);
}
.faq-accordion .accordion-title::before{display:none;}
.faq-accordion .accordion-title::after{
  content:"";
  position:absolute;right:26px;top:50%;
  width:9px;height:9px;
  border-right:2px solid var(--text-2);
  border-bottom:2px solid var(--text-2);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .22s ease-out,border-color .22s ease-out;
}
.faq-accordion .accordion-item.is-active .accordion-title::after{
  border-color:var(--lime);
  transform:translateY(-30%) rotate(-135deg);
}
.faq-accordion .accordion-content{
  padding:0 60px 22px 24px;
  background:transparent;
  border:0;
  color:var(--text-2);
  font-size:15px;
  line-height:1.8;
}
.faq-accordion .accordion-content p{margin:0;}
.faq-accordion .accordion-content p + p{margin-top:12px;}
.faq-accordion .accordion-content a{font-weight:600;}

/* ============ 下载面板 ============ */
.dl-panel{
  display:grid;grid-template-columns:1fr 200px;gap:36px;align-items:center;
  padding:36px;border-radius:var(--r-panel);
  background:linear-gradient(135deg,rgba(46,74,143,.42),rgba(18,28,48,.94) 62%,rgba(12,20,36,.96));
  border:1px solid rgba(47,212,192,.22);
  box-shadow:var(--shadow-card);
}
.dl-panel h3{font-size:22px;font-weight:700;margin-bottom:10px;}
.dl-panel .dl-desc{font-size:15px;color:var(--text-2);margin-bottom:24px;max-width:520px;}
.dl-main{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-bottom:16px;}
.dl-secondary{display:flex;flex-wrap:wrap;gap:12px;}
.dl-facts{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;
}
.dl-facts span{
  font-size:13px;color:var(--text-2);
  padding:6px 12px;border-radius:var(--r-pill);
  border:1px solid var(--border);
  background:rgba(255,255,255,.04);
}
.qr-box{
  width:140px;height:140px;margin:0 auto;
  border-radius:var(--r-img);
  border:1px dashed rgba(255,255,255,.28);
  background:rgba(8,13,24,.6);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  color:var(--text-3);font-size:12px;text-align:center;
}
.qr-box svg{width:34px;height:34px;stroke:var(--text-3);}
.qr-caption{margin-top:12px;font-size:13px;color:var(--text-3);text-align:center;line-height:1.7;}

/* ============ CTA 条 ============ */
.cta-bar{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:32px;border-radius:var(--r-panel);
  background:linear-gradient(90deg,rgba(47,212,192,.14),rgba(198,240,74,.07) 55%,rgba(12,20,36,.6));
  border:1px solid var(--border-strong);
}
.cta-bar h3{font-size:20px;font-weight:700;margin-bottom:8px;}
.cta-bar p{font-size:14px;color:var(--text-2);max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:var(--sp-6);
  padding:64px 0 24px;
  background:var(--ink-950);
  border-top:1px solid var(--border);
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;
}
.footer-col{padding-right:28px;}
.footer-divider{border-left:1px solid var(--border);padding-left:28px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.85;margin-bottom:16px;max-width:340px;}
.footer-col h3{font-size:15px;font-weight:600;color:var(--text);margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col li{font-size:14px;color:var(--text-3);}
.footer-col a{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--lime);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  margin-top:44px;padding-top:20px;
  border-top:1px solid var(--border);
  font-size:13px;color:var(--text-3);
}

/* ============ 动效 ============ */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .4s ease-out,transform .4s ease-out;
}
.reveal.is-visible{opacity:1;transform:translateY(0);}

/* ============ 响应式 ============ */
@media (min-width:1440px){
  .container{max-width:1320px;}
  .hero-grid{grid-template-columns:1.15fr .85fr;}
}

@media (max-width:1023px){
  :root{--sp-6:64px;}
  .nav-chips{display:none;}
  .nav-toggle{display:inline-flex;}
  .chip-strip{display:block;}
  .header-actions .btn-primary{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-visual{order:2;}
  .check-panel{grid-template-columns:1fr;gap:24px;}
  .dl-panel{grid-template-columns:1fr;gap:28px;}
  .qr-box{margin:0;}
  .qr-caption{text-align:left;}
  .footer-grid{grid-template-columns:1fr 1fr;row-gap:36px;}
  .footer-col{padding-right:0;}
  .footer-divider{border-left:0;padding-left:0;}
  .footer-brand{grid-column:1 / -1;}
}

@media (max-width:767px){
  :root{--sp-6:48px;}
  .container{padding:0 16px;}
  .cat-hero{padding:36px 0 44px;}
  .hero-actions .btn{width:100%;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .dl-main{flex-direction:column;align-items:stretch;}
  .dl-secondary{flex-direction:column;align-items:stretch;}
  .dl-secondary .btn{width:100%;}
  .cta-bar{padding:24px;}
  .cta-actions{width:100%;flex-direction:column;align-items:stretch;}
  .cta-actions .btn{width:100%;}
  .spec-block{padding:6px 18px 10px;}
  .spec-row{grid-template-columns:1fr;gap:4px;padding:14px 0;}
  .faq-accordion .accordion-title{padding:16px 52px 16px 18px;font-size:15px;}
  .faq-accordion .accordion-content{padding:0 18px 18px 18px;}
  .faq-accordion .accordion-title::after{right:20px;}
  .cat-switch{flex-wrap:nowrap;overflow-x:auto;padding:8px;scrollbar-width:none;}
  .cat-switch::-webkit-scrollbar{display:none;}
  .cat-pill{white-space:nowrap;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  .btn,.cat-pill,.check-item,.nav-chip{transition:none;}
}