/* roulang page: index */
:root{
  --ink:#0D1210;
  --ink-soft:#1A211E;
  --lime:#C9F24D;
  --orange:#FF6A3D;
  --bg:#F6F6F2;
  --card:#FFFFFF;
  --line:#E3E5DE;
  --text:#171A18;
  --muted:#5C6367;
  --weak:#8E969A;
  --radius:4px;
  --radius-card:6px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(13,18,16,.06);
  --shadow-2:0 10px 28px rgba(13,18,16,.08);
  --sans:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;
  --container:1200px;
  --pad:32px;
  --sect:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.28;color:var(--text)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--pad)}
.section{padding:var(--sect) 0}
.section-tight{padding:64px 0}
.section-dark{background:var(--ink);color:#EDF1EA}
.section-dark h2,.section-dark h3{color:#FFFFFF}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,3.2vw,36px)}
.section-head p{color:var(--muted);max-width:620px;margin-top:10px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--muted);font-family:var(--mono);
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--lime);display:block}
.section-dark .eyebrow{color:#A9B3AC}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--radius);
  border:1px solid transparent;font-size:15px;font-weight:700;
  cursor:pointer;transition:all .22s cubic-bezier(.2,.7,.2,1);
  white-space:nowrap;
}
.btn-primary{background:var(--lime);color:var(--ink);border-color:var(--lime);box-shadow:var(--shadow-1)}
.btn-primary:hover,.btn-primary:focus-visible{background:var(--ink);color:var(--lime);border-color:var(--ink);transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--text);border-color:var(--line)}
.btn-outline:hover,.btn-outline:focus-visible{background:#EFF2E8;border-color:var(--ink);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:#DCE2DA;border-color:rgba(255,255,255,.22)}
.btn-ghost:hover,.btn-ghost:focus-visible{border-color:var(--lime);color:var(--lime)}
.btn-sm{min-height:34px;padding:0 14px;font-size:13px}
.btn-dark{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-dark:hover,.btn-dark:focus-visible{background:var(--lime);color:var(--ink);border-color:var(--lime);transform:translateY(-2px)}
.btn:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.link-cta{
  display:inline-flex;align-items:center;gap:6px;
  font-weight:700;font-size:15px;color:var(--text);
  border-top:1px solid var(--line);padding-top:10px;
  transition:color .2s ease;
}
.link-cta .arw{transition:transform .22s cubic-bezier(.2,.7,.2,1)}
.link-cta:hover{color:#3E6B12}
.link-cta:hover .arw{transform:translateX(4px)}

/* 顶部信息条 */
.topbar{background:var(--ink);color:#D7DED6;font-size:13px}
.topbar-inner{display:flex;align-items:center;gap:20px;min-height:38px}
.topbar-domain{font-family:var(--mono);letter-spacing:.02em;color:#9FA9A1}
.topbar-note{color:#B8C1B9;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topbar-actions{display:flex;align-items:center;gap:10px}
@media(max-width:767px){
  .topbar-note,.topbar-actions .btn-ghost{display:none}
  .topbar-inner{justify-content:space-between}
}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(246,246,242,.96);
  border-bottom:1px solid transparent;backdrop-filter:saturate(150%) blur(8px);
  transition:box-shadow .25s ease,border-color .25s ease;
}
.site-header.is-compact{border-bottom-color:var(--line);box-shadow:var(--shadow-2)}
.nav-inner{display:flex;align-items:center;gap:28px;height:72px;transition:height .25s ease}
.site-header.is-compact .nav-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{
  width:36px;height:36px;border-radius:var(--radius);
  background:var(--ink);color:var(--lime);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-weight:700;font-size:14px;letter-spacing:-.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:17px;font-weight:800;letter-spacing:-.02em}
.brand-text small{font-size:11px;color:var(--muted);letter-spacing:.14em}
.main-nav{display:flex;align-items:center;gap:4px;flex:1}
.main-nav a{
  position:relative;padding:10px 14px;border-radius:var(--radius);
  font-size:15px;color:var(--muted);font-weight:600;transition:color .2s ease,background .2s ease;
}
.main-nav a:hover{color:var(--text);background:#EDEFE8}
.main-nav a.is-active{color:var(--text);font-weight:800}
.main-nav a.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--lime);
}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  min-height:44px;min-width:44px;border:1px solid var(--line);background:#fff;
  border-radius:var(--radius);font-size:14px;font-weight:700;color:var(--text);cursor:pointer;
}
.mobile-nav{display:none;border-top:1px solid var(--line);background:#fff;padding:10px 0 18px}
.mobile-nav a{display:block;padding:13px var(--pad);font-size:16px;font-weight:600;border-bottom:1px solid #F0F1EC}
.mobile-nav a.is-active{color:#2F5A0D;border-left:3px solid var(--lime)}
.mobile-nav .mobile-cta{margin:16px var(--pad) 0}
@media(max-width:1023px){
  .main-nav,.nav-cta{display:none}
  .nav-toggle{display:inline-flex}
  .mobile-nav.is-open{display:block}
}

/* Hero */
.hero{padding:72px 0 84px;position:relative;overflow:hidden;background:
  radial-gradient(900px 420px at 88% -10%,rgba(201,242,77,.30),transparent 60%),
  linear-gradient(180deg,#F6F6F2 0%,#F1F3EC 100%);
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(32px,5vw,58px);margin:16px 0 18px}
.hero-sub{font-size:17px;color:var(--muted);max-width:560px}
.hero-actions{display:flex;gap:14px;margin:28px 0 34px;flex-wrap:wrap}
.hero-metrics{display:flex;gap:36px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:20px}
.hero-metrics div{min-width:92px}
.hero-metrics dt{font-family:var(--mono);font-size:22px;font-weight:700;color:var(--ink)}
.hero-metrics dd{margin:4px 0 0;font-size:13px;color:var(--weak)}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow-2);
}
.hero-media::after{
  content:"";position:absolute;inset:auto -14px -14px auto;width:96px;height:96px;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:12px 12px;z-index:-1;opacity:.9;
}
@media(max-width:1023px){
  .hero{padding:48px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-media{order:-1}
  .hero-metrics{gap:24px}
}

/* 卖点三连 */
.pillars{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:22px}
.pillar{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:32px 28px;box-shadow:var(--shadow-1);transition:all .25s cubic-bezier(.2,.7,.2,1);
}
.pillar:hover{transform:translateY(-2px);border-color:var(--lime);box-shadow:var(--shadow-2)}
.pillar-dark{background:var(--ink);border-color:var(--ink);color:#DCE3DB}
.pillar-dark h3{color:#fff}
.pillar-dark p{color:#AEB8B0}
.pillar-num{font-family:var(--mono);font-size:34px;font-weight:700;color:var(--lime);letter-spacing:-.03em;display:block;margin-bottom:18px}
.pillar h3{font-size:21px;margin-bottom:12px}
.pillar p{color:var(--muted);font-size:15.5px}
@media(max-width:1023px){.pillars{grid-template-columns:1fr}}
@media(min-width:1024px) and (max-width:1199px){.pillars{grid-template-columns:1fr 1fr}}

/* Zigzag */
.zigzag{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;padding:44px 0;border-top:1px solid var(--line)}
.zigzag:first-of-type{border-top:0;padding-top:0}
.zigzag.rev .zz-media{order:-1}
.zigzag img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow-1)}
.zz-copy h3{font-size:clamp(22px,2.4vw,28px);margin-bottom:14px}
.zz-copy p{color:var(--muted);margin-bottom:18px}
.zz-list li{position:relative;padding-left:22px;margin-bottom:10px;color:var(--text);font-size:15.5px}
.zz-list li::before{content:"";position:absolute;left:0;top:12px;width:8px;height:8px;background:var(--lime);border-radius:1px}
@media(max-width:1023px){
  .zigzag{grid-template-columns:1fr;gap:28px}
  .zigzag.rev .zz-media{order:0}
}

/* 数据条 + 评价 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius-card);overflow:hidden}
.stat{background:var(--ink);padding:28px 24px}
.stat b{display:block;font-family:var(--mono);font-size:32px;color:var(--lime);letter-spacing:-.02em}
.stat span{font-size:14px;color:#A9B3AC}
@media(max-width:767px){.stats{grid-template-columns:1fr 1fr}}
.quotes{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:22px;margin-top:56px}
.quote{background:var(--ink-soft);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-card);padding:28px}
.quote p{color:#DCE3DB;font-size:15.5px}
.q-person{display:flex;align-items:center;gap:12px;margin-top:22px}
.q-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--lime),#7FA326);display:flex;align-items:center;justify-content:center;color:var(--ink);font-family:var(--mono);font-weight:700;font-size:14px}
.q-person small{display:block;color:#8E969A;font-size:13px}
@media(max-width:1023px){.quotes{grid-template-columns:1fr}}
.tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:44px}
.tag{
  display:inline-flex;align-items:center;padding:7px 14px;border-radius:var(--radius-pill);
  border:1px solid rgba(255,255,255,.2);color:#C4CCC5;font-size:13.5px;transition:all .2s ease;
}
.tag:hover{border-color:var(--lime);color:var(--lime)}

/* 内容卡片 */
.grid-posts{margin:-12px}
.grid-posts > .cell{padding:12px}
.post-card{
  display:flex;flex-direction:column;height:100%;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-1);transition:all .25s cubic-bezier(.2,.7,.2,1);
}
.post-card:hover{transform:translateY(-2px);border-color:var(--lime);box-shadow:var(--shadow-2)}
.post-thumb{position:relative;overflow:hidden}
.post-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s cubic-bezier(.2,.7,.2,1)}
.post-card:hover .post-thumb img{transform:scale(1.03)}
.badge{
  position:absolute;left:12px;top:12px;display:inline-block;
  padding:4px 11px;border-radius:var(--radius-pill);background:rgba(255,255,255,.94);
  border:1px solid var(--line);font-size:12px;font-weight:700;color:var(--muted);
}
.post-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.post-title{font-size:18.5px;line-height:1.45;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-excerpt{color:var(--muted);font-size:14.8px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:18px}
.post-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid #F0F1EC;padding-top:14px;font-size:13px;color:var(--weak)}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--radius-card);background:#fff;
  padding:56px 24px;text-align:center;color:var(--muted);
}
.empty-state p{margin-bottom:18px}

/* FAQ */
.faq-large{margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:20px;padding:24px 4px;font-size:17.5px;font-weight:700;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-ico{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-family:var(--mono);
  font-size:15px;color:var(--muted);transition:all .25s ease;
}
.faq-item[open] .faq-ico{background:var(--lime);border-color:var(--lime);color:var(--ink);transform:rotate(180deg)}
.faq-ico::before{content:"+"}
.faq-item[open] .faq-ico::before{content:"−"}
.faq-body{padding:0 4px 26px;color:var(--muted);font-size:15.5px;max-width:820px}

/* CTA 带 */
.cta-band{
  background:var(--ink);border-radius:var(--radius-card);padding:56px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);margin-bottom:10px}
.cta-band p{color:#A9B3AC;max-width:560px}
.cta-band-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 固定转化条 */
.sticky-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(13,18,16,.97);border-top:1px solid rgba(255,255,255,.14);
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  align-items:center;justify-content:space-between;gap:12px;
}
.sticky-bar span{color:#D7DED6;font-size:14px;font-weight:600}
.sticky-placeholder{display:none;height:76px}

/* 页脚 */
.site-footer{background:var(--ink);color:#B8C1B9;padding:72px 0 28px;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:18px;letter-spacing:.02em}
.site-footer p{font-size:14.5px;color:#9FA9A1}
.footer-links li{margin-bottom:11px}
.footer-links a{font-size:14.5px;color:#B8C1B9;transition:color .2s ease}
.footer-links a:hover{color:var(--lime)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#8E969A;
}
@media(max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .site-footer{padding:56px 0 24px;margin-top:64px}
}
@media(max-width:599px){
  .footer-grid{grid-template-columns:1fr}
}

/* 响应式微调 */
@media(max-width:767px){
  :root{--pad:20px;--sect:64px}
  body{font-size:16px}
  .section-head{margin-bottom:28px}
  .cta-band{padding:36px 24px}
}
@media(min-width:1024px){:root{--pad:48px}}
@media(min-width:1440px){:root{--container:1240px}}

/* 动效 */
.reveal{opacity:0;transform:translateY(12px)}
.reveal.is-in{opacity:1;transform:none;transition:opacity .5s cubic-bezier(.2,.7,.2,1),transform .5s cubic-bezier(.2,.7,.2,1)}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none}
  *{transition:none!important;animation:none!important}
}
@media(max-width:1023px){
  .sticky-bar{display:flex}
  .sticky-placeholder{display:block}
}

/* roulang page: article */
:root{
  --ink:#0D1210;
  --ink-2:#1A211E;
  --lime:#C9F24D;
  --orange:#FF6A3D;
  --bg:#F6F6F2;
  --card:#FFFFFF;
  --line:#E3E5DE;
  --text:#171A18;
  --muted:#5C6367;
  --weak:#8E969A;
  --r:4px;
  --r-card:6px;
  --sh-1:0 1px 2px rgba(13,18,16,.06);
  --sh-2:0 10px 28px rgba(13,18,16,.08);
  --sans:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Consolas,Menlo,monospace;
  --container:1200px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.8;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--r)}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:var(--ink)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,h5{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.25}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:var(--lime);color:var(--ink)}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media (min-width:640px){.container{padding:0 32px}}
@media (min-width:1024px){.container{padding:0 48px}}
@media (min-width:1440px){.container{max-width:1240px}}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--ink);color:#D8DED9;font-size:13px;line-height:1}
.topbar-inner{display:flex;align-items:center;gap:16px;min-height:38px;padding-top:6px;padding-bottom:6px}
.topbar-domain{font-family:var(--mono);letter-spacing:.02em;color:#9BA39C}
.topbar-note{position:relative;padding-left:14px;color:#B9C1BB}
.topbar-note::before{content:"";position:absolute;left:0;top:50%;width:6px;height:6px;margin-top:-3px;border-radius:50%;background:var(--orange)}
.topbar-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.topbar-actions .btn{height:26px;padding:0 12px;font-size:12.5px}
@media (max-width:767px){.topbar-domain,.topbar-note{display:none}.topbar-actions{margin-left:0;width:100%;justify-content:center}.topbar-actions .btn-ghost{display:none}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r);
  border:1px solid transparent;background:transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-sm{height:34px;padding:0 14px;font-size:13.5px}
.btn-primary{background:var(--lime);color:var(--ink);border-color:var(--lime);font-weight:700}
.btn-primary:hover{background:var(--ink);color:var(--lime);border-color:var(--ink);transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-ghost{border-color:#3A443E;color:#D8DED9}
.btn-ghost:hover{border-color:var(--lime);color:var(--lime);background:#161C19}
.btn-outline{border-color:var(--line);background:var(--card);color:var(--text)}
.btn-outline:hover{border-color:var(--ink);background:#F1F2EC;transform:translateY(-2px);box-shadow:var(--sh-1)}
.btn:disabled,.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.link-cta{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:14.5px;color:var(--ink);border-top:2px solid var(--ink);padding-top:8px}
.link-cta .arrow{transition:transform .22s var(--ease)}
.link-cta:hover .arrow{transform:translateX(4px)}
.link-cta:hover{color:var(--ink)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(246,246,242,.94);
  backdrop-filter:saturate(150%) blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease);
}
.site-header.is-compact{border-bottom-color:var(--line);box-shadow:var(--sh-1);background:rgba(246,246,242,.98)}
.header-inner{display:flex;align-items:center;gap:24px;height:76px;transition:height .25s var(--ease)}
.site-header.is-compact .header-inner{height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:36px;height:36px;border-radius:var(--r);background:var(--ink);color:var(--lime);
  display:grid;place-items:center;font-family:var(--mono);font-weight:700;font-size:14px;letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:17px;font-weight:800;letter-spacing:-.01em}
.brand-text small{font-size:11.5px;color:var(--muted);letter-spacing:.16em;font-family:var(--mono)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:12px}
.main-nav a{
  position:relative;display:inline-flex;align-items:center;height:38px;padding:0 12px;
  font-size:14.5px;font-weight:500;color:var(--muted);border-radius:var(--r);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.main-nav a:hover{color:var(--ink);background:#EDEEE7}
.main-nav a.is-active{color:var(--ink);font-weight:700}
.main-nav a.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--lime)}
.header-cta{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r);
  background:var(--card);cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);transition:transform .25s var(--ease),opacity .25s var(--ease)}
.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)}
@media (max-width:1023px){
  .header-cta .btn{display:none}
  .nav-toggle{display:flex}
  .main-nav{
    position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:0;
    background:var(--card);border-bottom:1px solid var(--line);box-shadow:var(--sh-2);
    padding:8px 20px 16px;margin-left:0;display:none;
  }
  .main-nav.is-open{display:flex}
  .main-nav a{height:48px;padding:0 8px;font-size:15.5px;border-bottom:1px solid var(--line)}
  .main-nav a.is-active::after{left:8px;right:auto;width:22px;bottom:8px}
}

/* ---------- 面包屑 ---------- */
.crumbs{padding:22px 0 0;font-size:13px;color:var(--weak)}
.crumbs ol{display:flex;align-items:center;gap:8px;flex-wrap:nowrap;overflow:hidden}
.crumbs li{display:flex;align-items:center;gap:8px;min-width:0}
.crumbs li+li::before{content:"/";color:var(--line)}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--ink)}
.crumbs .crumb-current{color:var(--weak);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:42vw}

/* ---------- 文章头 ---------- */
.article-head{padding:26px 0 34px;border-bottom:1px solid var(--line)}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;
  background:#EEF3E0;border:1px solid #DCE6C4;color:#41501F;font-size:12px;font-weight:600;letter-spacing:.02em;
}
.article-head h1{
  font-size:clamp(28px,4.2vw,46px);margin:16px 0 0;max-width:900px;
}
.article-meta{
  display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:20px;
  font-family:var(--mono);font-size:13px;color:var(--muted);
}
.article-meta span{display:inline-flex;align-items:center;gap:7px}
.article-meta span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--lime)}
.article-meta span:first-child::before{background:var(--orange)}

/* ---------- 正文布局 ---------- */
.article-layout{padding:48px 0 0}
@media (min-width:1024px){.article-layout{padding:64px 0 0}}
.article-body{max-width:780px;font-size:17px;line-height:1.9;color:#232826}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  font-size:28px;margin:2.1em 0 .8em;padding-left:14px;position:relative;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;background:var(--lime);border-radius:2px}
.article-body h3{font-size:22px;margin:1.7em 0 .6em}
.article-body h4{font-size:18px;margin:1.4em 0 .5em}
.article-body a{color:#3E5A12;text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;text-decoration-color:#A9C46A}
.article-body a:hover{color:var(--ink);text-decoration-color:var(--ink)}
.article-body ul{margin:0 0 1.2em;padding-left:2px}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:.55em}
.article-body ul li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;background:var(--ink);border-radius:1px}
.article-body ol{margin:0 0 1.2em;counter-reset:li;padding-left:2px}
.article-body ol li{position:relative;padding-left:30px;margin-bottom:.55em;counter-increment:li}
.article-body ol li::before{content:counter(li);position:absolute;left:0;top:.2em;font-family:var(--mono);font-size:13px;font-weight:700;color:var(--ink);background:#E9EBDD;border-radius:3px;width:20px;height:20px;display:grid;place-items:center}
.article-body blockquote{
  margin:1.6em 0;padding:16px 20px;border-left:4px solid var(--ink);background:#EFF0E9;
  border-radius:0 var(--r) var(--r) 0;color:#333A36;font-size:16.5px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{margin:1.6em 0;box-shadow:var(--sh-1)}
.article-body figure{margin:1.8em 0}
.article-body figcaption{margin-top:10px;font-size:13.5px;color:var(--weak);text-align:center}
.article-body .table-wrap{overflow-x:auto;margin:1.7em 0;-webkit-overflow-scrolling:touch}
.article-body table{width:100%;border-collapse:collapse;font-size:15.5px;min-width:520px}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top}
.article-body th{background:#F0F1EA;font-weight:700;font-size:14.5px;color:var(--ink)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}
.article-body code{font-family:var(--mono);font-size:.92em;background:#EFF0E9;padding:2px 6px;border-radius:3px}

/* ---------- 侧栏 ---------- */
.sidebar{display:flex;flex-direction:column;gap:20px}
@media (min-width:1024px){.sidebar{position:sticky;top:96px}}
.side-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh-1)}
.side-card h3{font-size:14px;letter-spacing:.06em;text-transform:uppercase;color:var(--weak);font-family:var(--mono);font-weight:700;margin-bottom:14px}
.toc-list li+li{border-top:1px solid var(--line)}
.toc-list a{display:flex;gap:10px;align-items:baseline;padding:11px 0;font-size:14.5px;color:var(--muted)}
.toc-list a:hover{color:var(--ink)}
.toc-list .idx{font-family:var(--mono);font-size:12px;color:var(--orange);min-width:18px}
.side-links li+li{margin-top:12px}
.side-links a{display:block;font-size:14.5px;color:var(--muted);line-height:1.6}
.side-links a:hover{color:var(--ink)}
.side-cta{background:var(--ink);border-color:var(--ink);color:#DDE3DE}
.side-cta h3{color:#8E969A}
.side-cta p{font-size:14.5px;color:#B9C1BB;margin-bottom:16px}

/* ---------- 相关推荐 ---------- */
.related{padding:72px 0 0;border-top:1px solid var(--line);margin-top:72px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}
.section-head h2{font-size:clamp(22px,3vw,32px)}
.card-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}
.post-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  display:flex;flex-direction:column;box-shadow:var(--sh-1);
  transition:border-color .25s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease);
}
.post-card:hover{border-color:var(--ink);transform:translateY(-2px);box-shadow:var(--sh-2)}
.post-card .thumb{aspect-ratio:16/9;overflow:hidden;background:#E7E9E0;border-radius:0}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .5s var(--ease)}
.post-card:hover .thumb img{transform:scale(1.04)}
.post-card .body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card p{font-size:14.5px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-card .meta{margin-top:auto;font-family:var(--mono);font-size:12.5px;color:var(--weak);display:flex;justify-content:space-between;align-items:center;padding-top:10px;border-top:1px solid var(--line)}

/* ---------- 底部返回 ---------- */
.article-foot{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;padding:44px 0 0}

/* ---------- CTA 带 ---------- */
.cta-band{margin-top:80px;background:var(--ink);color:#E6EAE6;border-radius:var(--r-card);padding:40px 28px;position:relative;overflow:hidden}
@media (min-width:768px){.cta-band{padding:56px 48px}}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(201,242,77,.22),rgba(201,242,77,0) 70%);
}
.cta-band h2{font-size:clamp(22px,3vw,32px);color:#fff;max-width:620px}
.cta-band p{margin-top:14px;color:#AEB6B0;max-width:620px;font-size:15.5px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;position:relative;z-index:1}

/* ---------- 空态 ---------- */
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);background:var(--card);
  padding:56px 24px;text-align:center;
}
.empty-state strong{display:block;font-size:19px;margin-bottom:10px}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:20px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#A9B1AB;margin-top:96px;padding:56px 0 0;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:var(--lime);color:var(--ink)}
.footer-brand .brand-text strong{color:#fff;font-size:17px}
.footer-brand .brand-text small{color:#8E969A;font-size:11.5px;letter-spacing:.16em;font-family:var(--mono)}
.site-footer p{line-height:1.8;max-width:340px}
.site-footer h4{color:#fff;font-size:14px;letter-spacing:.04em;margin-bottom:16px}
.footer-links li+li{margin-top:10px}
.footer-links a{color:#A9B1AB}
.footer-links a:hover{color:var(--lime)}
.footer-bottom{
  margin-top:44px;border-top:1px solid #232B26;padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:#7C857F;font-family:var(--mono);
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px)}
.reveal.is-in{opacity:1;transform:none;transition:opacity .55s var(--ease),transform .55s var(--ease)}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* roulang page: category1 */
:root{
  --ink:#0D1210;
  --ink-2:#161D1A;
  --lime:#C9F24D;
  --orange:#FF6A3D;
  --bg:#F6F6F2;
  --card:#FFFFFF;
  --line:#E3E5DE;
  --line-strong:#C6CCC3;
  --text:#171A18;
  --muted:#5C6367;
  --weak:#8E969A;
  --radius:4px;
  --radius-card:6px;
  --radius-pill:999px;
  --sh-1:0 1px 2px rgba(13,18,16,.06);
  --sh-2:0 10px 28px rgba(13,18,16,.08);
  --ease:cubic-bezier(.2,.7,.2,1);
  --sans:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Consolas,"Liberation Mono",Menlo,monospace;
  --section:64px;
}
@media (min-width:768px){ :root{ --section:88px; } }
@media (min-width:1024px){ :root{ --section:112px; } }

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:var(--sans); font-size:16px; line-height:1.8;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body.nav-open{ overflow:hidden; }
img{ max-width:100%; height:auto; display:block; }
a{ color:inherit; text-decoration:none; transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease); }
button{ font:inherit; color:inherit; background:none; border:0; cursor:pointer; }
h1,h2,h3,h4,h5,h6{ margin:0; font-weight:800; line-height:1.3; letter-spacing:-.01em; }
p{ margin:0; }
ul,ol{ margin:0; padding:0; list-style:none; }
input,select,textarea{ font:inherit; }
:focus-visible{ outline:2px solid var(--lime); outline-offset:2px; }

.container{
  width:100%; max-width:1200px; margin:0 auto;
  padding-left:20px; padding-right:20px;
}
@media (min-width:640px){ .container{ padding-left:32px; padding-right:32px; } }
@media (min-width:1024px){ .container{ padding-left:48px; padding-right:48px; } }
@media (min-width:1440px){ .container{ max-width:1240px; } }

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:var(--ink); color:#C6CDC7; font-size:13px; line-height:1.5;
}
.topbar-inner{
  display:flex; align-items:center; justify-content:space-between;
  gap:18px; min-height:38px; padding-top:5px; padding-bottom:5px;
}
.topbar-domain{ font-family:var(--mono); font-size:12.5px; color:#98A19A; letter-spacing:.02em; flex-shrink:0; }
.topbar-note{
  flex:1; text-align:center; color:#A9B2AB; font-size:12.5px;
  overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
}
.topbar-actions{ display:flex; align-items:center; gap:8px; flex-shrink:0; }
.topbar .btn{ min-height:28px; padding:0 13px; font-size:12.5px; font-weight:600; border-radius:var(--radius-pill); }
.btn-quiet{ border:1px solid rgba(255,255,255,.22); color:#E2E7E2; }
.btn-quiet:hover{ border-color:var(--lime); color:var(--lime); }
.btn-lime{ background:var(--lime); color:var(--ink); }
.btn-lime:hover{ background:#fff; color:var(--ink); }
@media (max-width:767px){
  .topbar-domain,.topbar-note{ display:none; }
  .topbar-inner{ justify-content:center; }
}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky; top:0; z-index:80;
  background:rgba(246,246,242,.94);
  -webkit-backdrop-filter:blur(10px); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease);
}
.site-header.is-compact{ box-shadow:var(--sh-1); }
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  gap:20px; height:72px; transition:height .3s var(--ease);
}
.site-header.is-compact .header-inner{ height:58px; }

.brand{ display:inline-flex; align-items:center; gap:10px; flex-shrink:0; }
.brand-mark{
  width:34px; height:34px; border-radius:var(--radius-card);
  background:var(--ink); color:var(--lime);
  display:grid; place-items:center;
  font-family:var(--mono); font-weight:700; font-size:13px; letter-spacing:.02em;
  transition:transform .3s var(--ease);
}
.brand:hover .brand-mark{ transform:rotate(-6deg); }
.brand-text{ display:flex; flex-direction:column; line-height:1.05; }
.brand-text strong{ font-size:17px; font-weight:800; letter-spacing:-.01em; }
.brand-text small{ font-size:11px; color:var(--muted); letter-spacing:.16em; }

.main-nav{ display:flex; align-items:center; justify-content:center; gap:4px; flex:1; }
.main-nav a{
  position:relative; display:inline-flex; align-items:center;
  height:40px; padding:0 12px; border-radius:var(--radius);
  font-size:15px; color:var(--muted); white-space:nowrap;
}
.main-nav a:hover{ color:var(--text); background:rgba(13,18,16,.045); }
.main-nav a.is-active{ color:var(--text); font-weight:700; }
.main-nav a.is-active::after{
  content:""; position:absolute; left:12px; right:12px; bottom:1px;
  height:2px; border-radius:2px; background:var(--lime);
}
.header-cta{ display:flex; align-items:center; gap:10px; flex-shrink:0; }

.nav-toggle{
  display:none; width:44px; height:44px; border-radius:var(--radius);
  border:1px solid var(--line); background:#fff;
  align-items:center; justify-content:center;
}
.nav-toggle span{ position:relative; display:block; width:18px; height:2px; background:var(--ink); border-radius:2px; }
.nav-toggle span::before,.nav-toggle span::after{
  content:""; position:absolute; left:0; width:18px; height:2px; background:var(--ink);
  border-radius:2px; transition:transform .25s var(--ease),top .25s var(--ease),opacity .25s var(--ease);
}
.nav-toggle span::before{ top:-6px; }
.nav-toggle span::after{ top:6px; }
.nav-toggle.is-open span{ background:transparent; }
.nav-toggle.is-open span::before{ top:0; transform:rotate(45deg); }
.nav-toggle.is-open span::after{ top:0; transform:rotate(-45deg); }

.nav-backdrop{
  position:fixed; inset:0; background:rgba(13,18,16,.46);
  opacity:0; visibility:hidden; z-index:70;
  transition:opacity .3s var(--ease),visibility .3s var(--ease);
}
.nav-backdrop.is-open{ opacity:1; visibility:visible; }

@media (max-width:1023px){
  .nav-toggle{ display:inline-flex; }
  .header-cta .btn{ display:none; }
  .main-nav{
    position:fixed; top:0; right:0; bottom:0;
    width:min(84vw,360px); padding:92px 26px 32px;
    background:#fff; flex-direction:column; align-items:stretch; justify-content:flex-start;
    gap:0; z-index:90; overflow-y:auto;
    transform:translateX(102%); box-shadow:-18px 0 44px rgba(13,18,16,.16);
    transition:transform .32s var(--ease);
  }
  .main-nav.is-open{ transform:translateX(0); }
  .main-nav a{
    height:auto; padding:16px 4px; font-size:16.5px; color:var(--text);
    border-bottom:1px solid var(--line); border-radius:0;
  }
  .main-nav a:hover{ background:transparent; color:var(--ink); }
  .main-nav a.is-active::after{ display:none; }
  .main-nav a.is-active::before{
    content:""; display:inline-block; width:6px; height:6px; margin-right:10px;
    border-radius:50%; background:var(--lime); vertical-align:middle;
  }
}
@media (min-width:1024px){ .nav-backdrop{ display:none; } }

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  min-height:44px; padding:0 22px; border-radius:var(--radius);
  font-size:15px; font-weight:700; border:1px solid transparent;
  transition:transform .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-primary{ background:var(--lime); color:var(--ink); }
.btn-primary:hover{ background:var(--ink); color:var(--lime); transform:translateY(-2px); box-shadow:var(--sh-2); }
.btn-ghost{ border-color:var(--line); color:var(--text); background:transparent; }
.btn-ghost:hover{ background:#fff; border-color:var(--ink); transform:translateY(-2px); }
.btn-dark{ background:var(--ink); color:#fff; }
.btn-dark:hover{ background:var(--lime); color:var(--ink); transform:translateY(-2px); }
.btn:disabled,.btn[aria-disabled="true"]{ opacity:.45; pointer-events:none; }

.link-cta{
  display:inline-flex; align-items:center; gap:8px;
  font-size:14.5px; font-weight:700; color:var(--ink);
  border-bottom:1px solid var(--line-strong); padding-bottom:3px;
}
.link-cta::after{ content:"→"; transition:transform .22s var(--ease); }
.link-cta:hover{ color:var(--ink); border-color:var(--lime); }
.link-cta:hover::after{ transform:translateX(4px); }

/* ---------- 页头横幅 ---------- */
.page-hero{
  position:relative; color:#E8EDE8; padding:52px 0 58px;
  background-color:var(--ink);
  background-image:linear-gradient(180deg,rgba(13,18,16,.80),rgba(13,18,16,.95)),url('/assets/images/backpic/back-2.png');
  background-size:cover; background-position:center;
}
@media (min-width:768px){ .page-hero{ padding:68px 0 76px; } }
.page-hero .container{ position:relative; z-index:1; }
.crumb{ display:flex; align-items:center; flex-wrap:wrap; gap:8px; font-size:13px; color:#98A29B; margin-bottom:18px; }
.crumb a:hover{ color:var(--lime); }
.crumb .sep{ opacity:.5; }
.crumb .now{ color:#D8DED8; }

.badge{
  display:inline-flex; align-items:center; gap:6px;
  padding:4px 12px; border-radius:var(--radius-pill);
  font-size:12px; font-weight:600; letter-spacing:.02em;
  background:rgba(201,242,77,.14); color:var(--lime); border:1px solid rgba(201,242,77,.34);
}
.page-hero h1{ font-size:clamp(27px,4.2vw,44px); margin:16px 0 16px; max-width:900px; color:#fff; }
.page-hero .lede{ max-width:740px; color:#B4BDB6; font-size:16px; line-height:1.85; }
.hero-meta{
  display:flex; flex-wrap:wrap; gap:10px 24px; margin-top:26px;
  font-family:var(--mono); font-size:12.5px; color:#8C968F;
}
.hero-meta span{ display:inline-flex; align-items:center; gap:8px; }
.hero-meta span::before{
  content:""; width:6px; height:6px; border-radius:50%; background:var(--lime); flex-shrink:0;
}
.hero-actions{ display:flex; flex-wrap:wrap; gap:12px; margin-top:30px; }

/* ---------- 主体布局 ---------- */
.layout{ padding-top:48px; padding-bottom:var(--section); }
@media (min-width:768px){ .layout{ padding-top:64px; } }
.layout .cell{ min-width:0; }

.toc{
  position:sticky; top:92px;
  background:var(--card); border:1px solid var(--line);
  border-radius:var(--radius-card); padding:22px 18px; box-shadow:var(--sh-1);
}
.toc-title{
  font-family:var(--mono); font-size:11.5px; letter-spacing:.16em;
  color:var(--weak); margin-bottom:14px; text-transform:uppercase;
}
.toc-list li + li{ margin-top:2px; }
.toc-link{
  display:flex; align-items:baseline; gap:10px;
  padding:8px 8px; border-radius:var(--radius);
  font-size:14px; color:var(--muted); line-height:1.55;
}
.toc-link .num{ font-family:var(--mono); font-size:12px; color:var(--weak); flex-shrink:0; }
.toc-link:hover{ background:#F2F5EC; color:var(--text); }
.toc-link.is-current{ background:rgba(201,242,77,.22); color:var(--ink); font-weight:700; }
.toc-link.is-current .num{ color:var(--ink); }
.toc-foot{ margin-top:16px; padding-top:14px; border-top:1px solid var(--line); font-size:13px; color:var(--weak); line-height:1.7; }
@media (max-width:1023px){
  .toc{ position:static; margin-bottom:32px; }
}

.entry-list{ display:block; }
.entry{ padding:32px 0; border-bottom:1px solid var(--line); scroll-margin-top:96px; }
.entry:first-child{ padding-top:0; }
.entry:last-child{ border-bottom:0; padding-bottom:0; }
.entry-head{ display:flex; align-items:center; flex-wrap:wrap; gap:10px; margin-bottom:10px; }
.entry-index{ font-family:var(--mono); font-size:12px; letter-spacing:.1em; color:var(--weak); }
.entry-tag{
  padding:2px 10px; border-radius:var(--radius-pill);
  font-size:12px; color:var(--muted); background:#EEF1E8; border:1px solid var(--line);
}
.entry h2{
  font-size:clamp(20px,2.6vw,25px); line-height:1.4;
  padding-left:14px; border-left:4px solid var(--lime); margin-bottom:14px;
}
.entry p{ max-width:780px; color:#252B28; }
.entry p + p{ margin-top:14px; }
.entry p + .dot-list,
.entry p + .num-list{ margin-top:18px; }
.entry .dot-list + .note,
.entry .num-list + .note{ margin-top:20px; }

.dot-list{ display:grid; gap:10px; max-width:780px; }
.dot-list li{ position:relative; padding-left:20px; color:var(--muted); font-size:15.5px; line-height:1.75; }
.dot-list li::before{
  content:""; position:absolute; left:2px; top:.66em;
  width:6px; height:6px; background:var(--lime); border-radius:1px;
}

.num-list{ display:grid; gap:12px; max-width:780px; counter-reset:ni; }
.num-list li{
  display:grid; grid-template-columns:34px 1fr; gap:12px; align-items:start;
  font-size:15.5px; color:var(--muted); line-height:1.75;
}
.num-list li .n{
  font-family:var(--mono); font-size:13px; font-weight:700; color:var(--ink);
  background:#F1F4EA; border:1px solid var(--line); border-radius:var(--radius);
  text-align:center; line-height:1.8; padding:1px 0;
}

.note{
  max-width:780px; padding:16px 18px;
  background:#FBFCF6; border:1px solid var(--line); border-left:3px solid var(--orange);
  border-radius:var(--radius-card);
}
.note-tag{ display:block; font-family:var(--mono); font-size:11.5px; letter-spacing:.1em; color:var(--orange); margin-bottom:6px; }
.note p{ font-size:14.5px; color:var(--muted); max-width:100%; }

/* ---------- 通用板块 ---------- */
.section{ padding:var(--section) 0; }
.section-head{ max-width:740px; margin-bottom:36px; }
.section-head h2{ font-size:clamp(23px,3.2vw,33px); margin-bottom:12px; }
.section-head p{ color:var(--muted); font-size:15.5px; }
.eyebrow{
  display:inline-block; font-family:var(--mono); font-size:12px;
  letter-spacing:.16em; color:var(--weak); margin-bottom:12px;
}

.card-grid{ display:grid; gap:22px; grid-template-columns:1fr; }
@media (min-width:640px){ .card-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); } }
@media (min-width:1024px){ .card-grid.cols-3{ grid-template-columns:repeat(3,minmax(0,1fr)); } }

.card{
  display:flex; flex-direction:column; gap:12px;
  background:var(--card); border:1px solid var(--line);
  border-radius:var(--radius-card); padding:22px;
  box-shadow:var(--sh-1);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.card:hover{ transform:translateY(-2px); box-shadow:var(--sh-2); border-color:var(--line-strong); }
.card-img{
  width:100%; aspect-ratio:16/9; object-fit:cover;
  border-radius:var(--radius); border:1px solid var(--line); background:#EDEFE9;
}
.card h3{ font-size:18.5px; }
.card p{ font-size:14.8px; color:var(--muted); line-height:1.8; }
.card .card-tag{
  align-self:flex-start; padding:2px 10px; border-radius:var(--radius-pill);
  font-family:var(--mono); font-size:11.5px; color:var(--ink);
  background:rgba(201,242,77,.28); border:1px solid rgba(201,242,77,.6);
}

/* ---------- FAQ ---------- */
.faq{ max-width:880px; margin:0 auto; border-top:1px solid var(--line); }
.faq details{ border-bottom:1px solid var(--line); }
.faq summary{
  display:flex; align-items:center; justify-content:space-between; gap:18px;
  padding:22px 4px; cursor:pointer; font-size:16.5px; font-weight:700;
  list-style:none; line-height:1.6;
  transition:color .2s var(--ease);
}
.faq summary::-webkit-details-marker{ display:none; }
.faq summary:hover{ color:var(--ink); }
.faq .icon{ position:relative; width:18px; height:18px; flex-shrink:0; }
.faq .icon::before,.faq .icon::after{
  content:""; position:absolute; background:var(--ink);
  transition:transform .25s var(--ease),opacity .25s var(--ease);
}
.faq .icon::before{ left:0; top:8px; width:18px; height:2px; }
.faq .icon::after{ left:8px; top:0; width:2px; height:18px; }
.faq details[open] .icon::after{ transform:scaleY(0); opacity:0; }
.faq details[open] summary{ color:var(--ink); }
.faq .answer{ padding:0 4px 24px; max-width:770px; color:var(--muted); font-size:15.5px; }

/* ---------- 深色转化带 ---------- */
.cta-band{ background:var(--ink); color:#E9EDE9; padding:var(--section) 0; }
.cta-band h2{ color:#fff; font-size:clamp(23px,3.2vw,33px); margin-bottom:12px; }
.cta-band .lead{ color:#A9B2AB; max-width:720px; font-size:15.5px; }
.cta-grid{
  display:grid; gap:16px; margin-top:34px;
  grid-template-columns:1fr;
}
@media (min-width:768px){ .cta-grid{ grid-template-columns:repeat(3,minmax(0,1fr)); } }
.cta-item{
  padding:20px; border:1px solid rgba(255,255,255,.13);
  border-radius:var(--radius-card); background:rgba(255,255,255,.035);
  transition:border-color .25s var(--ease),transform .25s var(--ease);
}
.cta-item:hover{ border-color:rgba(201,242,77,.55); transform:translateY(-2px); }
.cta-item .k{ font-family:var(--mono); font-size:12.5px; color:var(--lime); display:block; margin-bottom:8px; }
.cta-item p{ color:#AEB7B0; font-size:14.6px; line-height:1.75; }
.cta-actions{ display:flex; flex-wrap:wrap; gap:12px; margin-top:34px; }
.cta-band .btn-ghost{ border-color:rgba(255,255,255,.24); color:#E9EDE9; }
.cta-band .btn-ghost:hover{ background:transparent; border-color:var(--lime); color:var(--lime); }

/* ---------- 页脚 ---------- */
.site-footer{ background:#0A0E0C; color:#9AA39C; padding:60px 0 26px; font-size:14.5px; }
.footer-grid{ display:grid; gap:34px; grid-template-columns:1fr; }
@media (min-width:640px){ .footer-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); } }
@media (min-width:1024px){ .footer-grid{ grid-template-columns:1.4fr 1fr 1fr 1fr; gap:40px; } }
.footer-brand{ display:flex; align-items:center; gap:10px; margin-bottom:14px; }
.footer-brand .brand-mark{ background:rgba(201,242,77,.14); color:var(--lime); }
.footer-brand .brand-text small{ color:var(--weak); }
.site-footer p{ color:#8C968F; font-size:14px; line-height:1.85; max-width:340px; }
.site-footer h4{ font-size:14px; color:#fff; margin-bottom:16px; letter-spacing:.02em; }
.footer-links li{ margin-bottom:10px; }
.footer-links li span{ color:#8C968F; }
.footer-links a{ color:#9AA39C; }
.footer-links a:hover{ color:var(--lime); }
.footer-bottom{
  margin-top:44px; padding-top:20px; border-top:1px solid rgba(255,255,255,.09);
  display:flex; flex-wrap:wrap; gap:10px; justify-content:space-between;
  font-size:13px; color:#7E8780;
}

/* ---------- 入场动效 ---------- */
.reveal{ opacity:0; transform:translateY(12px); transition:opacity .55s var(--ease),transform .55s var(--ease); }
.reveal.is-visible{ opacity:1; transform:none; }
@media (prefers-reduced-motion:reduce){
  *{ animation-duration:.001ms !important; transition-duration:.001ms !important; }
  .reveal{ opacity:1; transform:none; }
  html{ scroll-behavior:auto; }
}

/* roulang page: category2 */
:root{
  --ink:#0D1210;
  --ink-soft:#1A211E;
  --lime:#C9F24D;
  --orange:#FF6A3D;
  --bg:#F6F6F2;
  --card:#FFFFFF;
  --line:#E3E5DE;
  --text:#171A18;
  --muted:#5C6367;
  --weak:#8E969A;
  --r:4px;
  --r-card:6px;
  --r-pill:999px;
  --sh1:0 1px 2px rgba(13,18,16,.06);
  --sh2:0 10px 28px rgba(13,18,16,.08);
  --sans:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono","Courier New",monospace;
  --sec:96px;
  --container:1200px;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--text);text-decoration:none;transition:color .2s ease,border-color .2s ease;}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}
h1,h2,h3,h4{font-weight:800;letter-spacing:-.01em;line-height:1.28;margin:0;color:var(--ink);}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:640px){.container{padding:0 32px;}}
@media (min-width:1024px){.container{padding:0 48px;}}
@media (min-width:1440px){:root{--container:1240px;}}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:var(--ink);
  color:#C9CFCB;
  font-size:13px;
  min-height:38px;
  display:flex;
  align-items:center;
}
.topbar .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:38px;
  flex-wrap:wrap;
}
.topbar .tb-domain{font-family:var(--mono);font-size:12px;letter-spacing:.02em;color:#8E969A;}
.topbar .tb-note{display:none;color:#C9CFCB;}
.topbar .tb-actions{display:flex;align-items:center;gap:10px;}
.tb-link{
  color:#E6E9E5;
  font-size:13px;
  padding:6px 2px;
  border-bottom:1px solid transparent;
}
.tb-link:hover{color:var(--lime);border-bottom-color:var(--lime);}
@media (min-width:768px){
  .topbar .tb-note{display:block;}
}
@media (max-width:479px){
  .topbar .tb-domain{display:none;}
}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,246,242,.94);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.site-header.is-stuck{
  border-bottom-color:var(--line);
  box-shadow:var(--sh1);
  background:rgba(246,246,242,.98);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  height:64px;
  transition:height .25s ease;
}
.site-header.is-stuck .nav-inner{height:56px;}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:34px;height:34px;
  border-radius:var(--r);
  background:var(--ink);
  color:var(--lime);
  font-family:var(--mono);
  font-weight:700;
  font-size:14px;
  display:flex;align-items:center;justify-content:center;
  letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--ink);}
.brand-text small{font-size:11px;color:var(--muted);letter-spacing:.06em;}

.main-nav{
  display:none;
  align-items:center;
  gap:4px;
}
.main-nav a{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 12px;
  font-size:15px;
  color:var(--muted);
  border-bottom:2px solid transparent;
}
.main-nav a:hover{color:var(--ink);}
.main-nav a.is-active{color:var(--ink);font-weight:700;border-bottom-color:var(--lime);}

.nav-right{display:flex;align-items:center;gap:10px;}
.nav-toggle{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:0 14px;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:#fff;
  font-size:14px;
  color:var(--ink);
}
.nav-toggle:hover{border-color:var(--lime);}
@media (min-width:1024px){
  .main-nav{display:flex;}
  .nav-toggle{display:none;}
}
.drawer{
  display:none;
  border-top:1px solid var(--line);
  background:#fff;
}
.drawer.is-open{display:block;}
.drawer ul{padding:8px 0;}
.drawer a{
  display:flex;
  align-items:center;
  min-height:48px;
  padding:0 4px;
  border-bottom:1px solid var(--line);
  font-size:15px;
  color:var(--muted);
}
.drawer a.is-active{color:var(--ink);font-weight:700;}
.drawer li:last-child a{border-bottom:none;}
@media (min-width:1024px){.drawer{display:none !important;}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 20px;
  border-radius:var(--r);
  font-size:15px;
  font-weight:700;
  border:1px solid transparent;
  transition:transform .18s ease,background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--lime);color:var(--ink);}
.btn-primary:hover{background:var(--ink);color:var(--lime);transform:translateY(-2px);box-shadow:var(--sh2);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff;}
.btn-ghost:hover{border-color:var(--ink);background:#F0F1EC;}
.btn-dark{background:var(--ink);color:#fff;}
.btn-dark:hover{background:var(--lime);color:var(--ink);transform:translateY(-2px);}
.btn-sm{min-height:36px;padding:0 14px;font-size:13px;}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:700;
  font-size:15px;
  color:var(--ink);
  border-top:1px solid var(--ink);
  padding-top:8px;
}
.link-arrow span.ar{transition:transform .2s ease;}
.link-arrow:hover span.ar{transform:translateX(4px);}
.link-arrow:hover{color:var(--ink);border-top-color:var(--lime);}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:#F4F5F0;
  font-size:12px;
  color:var(--muted);
  letter-spacing:.02em;
}
.badge-lime{background:rgba(201,242,77,.22);border-color:rgba(201,242,77,.6);color:#3C4A12;}
.badge-orange{background:rgba(255,106,61,.14);border-color:rgba(255,106,61,.4);color:#8A3316;}
.dot{
  width:7px;height:7px;border-radius:50%;background:var(--orange);display:inline-block;
}

/* ---------- Hero ---------- */
.cat-hero{
  position:relative;
  background:var(--ink);
  color:#EDEFEA;
  overflow:hidden;
  border-bottom:1px solid var(--ink);
}
.cat-hero .hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  opacity:.30;
}
.cat-hero .hero-veil{
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(13,18,16,.94) 0%,rgba(13,18,16,.82) 46%,rgba(13,18,16,.62) 100%);
}
.cat-hero .hero-inner{
  position:relative;
  z-index:2;
  padding:72px 0 64px;
}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:#9AA3A0;
  font-family:var(--mono);
  margin-bottom:22px;
}
.crumb a{color:#C9CFCB;}
.crumb a:hover{color:var(--lime);}
.crumb .sep{color:#5C6367;}
.hero-tagrow{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;}
.hero-tagrow .badge{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.18);color:#DDE2DC;}
.cat-hero h1{
  color:#fff;
  font-size:clamp(32px,5vw,54px);
  max-width:900px;
  margin-bottom:18px;
}
.cat-hero h1 em{font-style:normal;color:var(--lime);}
.cat-hero .hero-sub{
  max-width:720px;
  color:#C4CBC6;
  font-size:17px;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px;}
.hero-actions .btn-ghost{background:transparent;border-color:rgba(255,255,255,.28);color:#fff;}
.hero-actions .btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff;}
.hero-metrics{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r);
  overflow:hidden;
  max-width:760px;
}
.hero-metrics div{
  background:rgba(13,18,16,.72);
  padding:14px 16px;
}
.hero-metrics b{
  display:block;
  font-family:var(--mono);
  font-size:20px;
  color:var(--lime);
  font-weight:700;
  letter-spacing:.02em;
}
.hero-metrics span{font-size:13px;color:#9AA3A0;}
@media (min-width:768px){
  .hero-metrics{grid-template-columns:repeat(4,minmax(0,1fr));}
  .cat-hero .hero-inner{padding:88px 0 76px;}
}

/* ---------- 筛选行 ---------- */
.filter-band{
  background:#fff;
  border-bottom:1px solid var(--line);
  position:sticky;
  top:56px;
  z-index:40;
}
.filter-inner{
  display:flex;
  align-items:center;
  gap:14px;
  padding:14px 0;
  overflow-x:auto;
  scrollbar-width:thin;
}
.filter-inner::-webkit-scrollbar{height:4px;}
.filter-inner::-webkit-scrollbar-thumb{background:var(--line);border-radius:4px;}
.filter-label{
  font-size:13px;
  color:var(--weak);
  font-family:var(--mono);
  white-space:nowrap;
  padding-right:12px;
  border-right:1px solid var(--line);
}
.filter-chip{
  flex:0 0 auto;
  min-height:36px;
  padding:0 16px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:#fff;
  color:var(--muted);
  font-size:14px;
  transition:all .2s ease;
}
.filter-chip:hover{border-color:var(--ink);color:var(--ink);}
.filter-chip.is-on{background:var(--ink);border-color:var(--ink);color:var(--lime);font-weight:700;}
.filter-count{
  margin-left:auto;
  font-family:var(--mono);
  font-size:13px;
  color:var(--weak);
  white-space:nowrap;
  padding-left:12px;
}

/* ---------- 板块通用 ---------- */
.section{padding:72px 0;}
.section-tight{padding:64px 0;}
@media (min-width:1024px){
  .section{padding:var(--sec) 0;}
}
.sec-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:36px;
  flex-wrap:wrap;
}
.sec-head h2{font-size:clamp(24px,3.2vw,34px);max-width:760px;}
.sec-kicker{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--orange);
  display:block;
  margin-bottom:12px;
}
.sec-lead{color:var(--muted);max-width:720px;margin-top:12px;}

/* ---------- 卡片网格 ---------- */
.card-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
@media (min-width:768px){
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
}
.topic-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh1);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.topic-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--sh2);
  border-color:var(--lime);
}
.topic-card .tc-media{
  position:relative;
  aspect-ratio:16/9;
  background:var(--ink);
  overflow:hidden;
}
.topic-card .tc-media img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .4s cubic-bezier(.2,.7,.2,1);
}
.topic-card:hover .tc-media img{transform:scale(1.03);}
.topic-card .tc-media .tc-index{
  position:absolute;
  left:12px;top:12px;
  font-family:var(--mono);
  font-size:12px;
  background:rgba(13,18,16,.82);
  color:var(--lime);
  padding:3px 9px;
  border-radius:var(--r-pill);
  letter-spacing:.06em;
}
.topic-card .tc-body{
  padding:22px;
  display:flex;
  flex-direction:column;
  gap:12px;
  flex:1;
}
.topic-card h3{font-size:20px;line-height:1.4;}
.topic-card .tc-desc{color:var(--muted);font-size:15px;margin:0;}
.tc-points{
  display:flex;
  flex-direction:column;
  gap:8px;
  margin:2px 0 0;
  padding-top:14px;
  border-top:1px dashed var(--line);
}
.tc-points li{
  position:relative;
  padding-left:18px;
  font-size:14px;
  color:var(--text);
}
.tc-points li::before{
  content:"";
  position:absolute;
  left:0;top:10px;
  width:8px;height:8px;
  background:var(--lime);
  border:1px solid var(--ink);
}
.tc-foot{
  margin-top:auto;
  padding-top:16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.tc-link{
  font-size:14px;
  font-weight:700;
  color:var(--ink);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.tc-link span.ar{transition:transform .2s ease;}
.tc-link:hover span.ar{transform:translateX(4px);}
.tc-link:hover{color:#3C4A12;}
.is-hidden{display:none !important;}

/* ---------- 数据条 ---------- */
.stat-band{
  background:var(--ink);
  color:#fff;
  border-radius:var(--r-card);
  padding:34px 24px;
}
.stat-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:26px 20px;
}
@media (min-width:900px){
  .stat-grid{grid-template-columns:repeat(4,minmax(0,1fr));}
}
.stat-item b{
  display:block;
  font-family:var(--mono);
  font-size:clamp(26px,3.6vw,38px);
  color:var(--lime);
  font-weight:700;
  line-height:1.1;
}
.stat-item span{
  display:block;
  margin-top:8px;
  font-size:14px;
  color:#A9B1AC;
}

/* ---------- 步骤 ---------- */
.steps{
  display:grid;
  grid-template-columns:1fr;
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
}
@media (min-width:900px){
  .steps{grid-template-columns:repeat(4,minmax(0,1fr));}
}
.step{
  background:#fff;
  padding:26px 22px;
  transition:background .2s ease;
}
.step:hover{background:#FAFBF7;}
.step .st-num{
  font-family:var(--mono);
  font-size:13px;
  color:var(--orange);
  letter-spacing:.1em;
  margin-bottom:12px;
  display:block;
}
.step h3{font-size:18px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--muted);margin:0;}

/* ---------- 引言 / 证据 ---------- */
.quote-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
@media (min-width:900px){
  .quote-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
}
.quote-card{
  background:#fff;
  border:1px solid var(--line);
  border-left:4px solid var(--lime);
  border-radius:var(--r-card);
  padding:22px;
  box-shadow:var(--sh1);
}
.quote-card p{font-size:15px;color:var(--text);}
.quote-who{display:flex;align-items:center;gap:12px;margin-top:14px;}
.quote-avatar{
  width:40px;height:40px;border-radius:50%;
  background:var(--ink);
  color:var(--lime);
  font-family:var(--mono);
  font-size:13px;
  display:flex;align-items:center;justify-content:center;
  flex:0 0 auto;
}
.quote-who b{display:block;font-size:14px;}
.quote-who span{font-size:12px;color:var(--weak);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:920px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-item summary{
  list-style:none;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:18px;
  padding:22px 4px;
  font-size:17px;
  font-weight:700;
  color:var(--ink);
  cursor:pointer;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-icon{
  flex:0 0 auto;
  width:24px;height:24px;
  border:1px solid var(--line);
  border-radius:var(--r);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);
  font-size:15px;
  color:var(--ink);
  transition:transform .25s ease,background .2s ease,border-color .2s ease;
  background:#fff;
}
.faq-item[open] .faq-icon{background:var(--lime);border-color:var(--lime);transform:rotate(180deg);}
.faq-item[open] summary{color:var(--ink);}
.faq-body{padding:0 4px 24px;color:var(--muted);font-size:15px;max-width:760px;}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--ink);
  color:#fff;
  border-radius:var(--r-card);
  padding:44px 28px;
  display:grid;
  grid-template-columns:1fr;
  gap:26px;
  align-items:center;
}
@media (min-width:900px){
  .cta-band{grid-template-columns:1.4fr 1fr;padding:52px 48px;}
}
.cta-band h2{color:#fff;font-size:clamp(24px,3vw,32px);margin-bottom:12px;}
.cta-band p{color:#B4BCB6;margin:0;font-size:15px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
@media (min-width:900px){.cta-actions{justify-content:flex-end;}}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);
  color:#A9B1AC;
  padding:64px 0 28px;
  margin-top:72px;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
  padding-bottom:36px;
  border-bottom:1px solid rgba(255,255,255,.1);
}
@media (min-width:768px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:1024px){
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:28px;}
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text small{color:var(--weak);}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.02em;}
.footer-links li{margin-bottom:10px;}
.footer-links a{color:#A9B1AC;}
.footer-links a:hover{color:var(--lime);}
.footer-bottom{
  padding-top:22px;
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  font-size:13px;
  color:var(--weak);
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.is-in{
  opacity:1;transform:none;
  transition:opacity .5s cubic-bezier(.2,.7,.2,1),transform .5s cubic-bezier(.2,.7,.2,1);
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root{
  --ink:#0D1210;
  --ink-soft:#1A211D;
  --lime:#C9F24D;
  --orange:#FF6A3D;
  --bg:#F6F6F2;
  --card:#FFFFFF;
  --line:#E3E5DE;
  --text:#171A18;
  --muted:#5C6367;
  --weak:#8E969A;
  --radius-s:4px;
  --radius-m:6px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(13,18,16,.06);
  --shadow-2:0 10px 28px rgba(13,18,16,.08);
  --sp-1:8px;
  --sp-2:12px;
  --sp-3:16px;
  --sp-4:24px;
  --sp-5:32px;
  --sp-6:48px;
  --sp-7:72px;
  --sp-8:96px;
  --font-sans:"Noto Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--radius-s);}
a{color:var(--text);text-decoration:none;transition:color .2s ease,border-color .2s ease;}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--lime);
  outline-offset:2px;
}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-0.01em;line-height:1.25;color:var(--text);}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:640px){.container{padding-left:32px;padding-right:32px;}}
@media (min-width:1024px){.container{padding-left:48px;padding-right:48px;}}
@media (min-width:1440px){.container{max-width:1240px;}}

/* 顶部信息条 */
.topbar{
  background:var(--ink);
  color:#D8DCD6;
  font-size:13px;
  min-height:38px;
  display:flex;
  align-items:center;
}
.topbar .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:38px;
}
.topbar-left{font-family:var(--font-mono);letter-spacing:.02em;color:#AEB6AF;white-space:nowrap;}
.topbar-mid{
  flex:1 1 auto;
  text-align:center;
  color:var(--weak);
  font-size:12px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.topbar-right{display:flex;align-items:center;gap:10px;}
.topbar-right .btn{min-height:26px;padding:3px 12px;font-size:12px;}
.topbar-right .btn-ghost{border-color:#3B453E;color:#D8DCD6;}
.topbar-right .btn-ghost:hover{background:#232C26;border-color:var(--lime);color:#fff;}
@media (max-width:767px){
  .topbar-mid,.topbar-right .btn-ghost{display:none;}
}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:10px 22px;
  border-radius:var(--radius-s);
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-primary{background:var(--lime);color:var(--ink);}
.btn-primary:hover{background:var(--ink);color:var(--lime);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--text);}
.btn-ghost:hover{background:#fff;border-color:var(--ink);transform:translateY(-2px);}
.btn-dark{background:var(--ink);color:#F2F4F0;}
.btn-dark:hover{background:var(--lime);color:var(--ink);transform:translateY(-2px);}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.link-cta{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:700;
  font-size:15px;
  color:var(--ink);
  border-bottom:1px solid var(--line);
  padding-bottom:2px;
}
.link-cta span.arrow{transition:transform .2s ease;}
.link-cta:hover{border-color:var(--lime);}
.link-cta:hover span.arrow{transform:translateX(4px);}

/* 导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,246,242,.96);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-stuck{box-shadow:var(--shadow-2);}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:64px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--ink);
  color:var(--lime);
  font-family:var(--font-mono);
  font-size:14px;
  font-weight:700;
  border-radius:var(--radius-s);
  letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:-0.01em;}
.brand-text small{font-size:11px;color:var(--muted);letter-spacing:.22em;}
.main-nav{display:flex;align-items:center;gap:26px;}
.main-nav a{
  position:relative;
  font-size:15px;
  color:var(--muted);
  padding:20px 0;
  font-weight:500;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:14px;
  height:2px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s ease;
}
.main-nav a:hover{color:var(--text);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.is-active{color:var(--text);font-weight:800;}
.main-nav a.is-active::after{transform:scaleX(1);}
.nav-cta{flex:0 0 auto;}
.nav-cta .btn{min-height:40px;padding:8px 18px;font-size:14px;}
.nav-toggle{display:none;}
@media (max-width:1023px){
  .main-nav{
    position:absolute;
    left:0;right:0;top:100%;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:#fff;
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-2);
    padding:8px 20px 20px;
    display:none;
  }
  .main-nav a{padding:14px 0;border-bottom:1px solid var(--line);}
  .main-nav a::after{display:none;}
  .main-nav a.is-active{color:var(--ink);}
  .main-nav a.is-active::before{content:"●";color:var(--lime);font-size:10px;margin-right:8px;vertical-align:2px;}
  .main-nav.is-open{display:flex;}
  .nav-toggle{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:44px;height:44px;
    border:1px solid var(--line);
    border-radius:var(--radius-s);
    background:#fff;
    color:var(--ink);
    cursor:pointer;
  }
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative;}
  .nav-toggle span::before,.nav-toggle span::after{
    content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);
  }
  .nav-toggle span::before{top:-6px;}
  .nav-toggle span::after{top:6px;}
}

/* 顶部大图带 */
.hero-band{
  position:relative;
  background-image:
    linear-gradient(115deg,rgba(13,18,16,.92) 0%,rgba(13,18,16,.72) 52%,rgba(13,18,16,.88) 100%),
    url("/assets/images/coverpic/cover-3.png");
  background-size:cover;
  background-position:center;
  color:#F2F4F0;
  padding:56px 0 60px;
  overflow:hidden;
}
.hero-band::after{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:44px 44px;
  pointer-events:none;
}
.hero-band .container{position:relative;z-index:2;}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:#9DA69F;
  font-family:var(--font-mono);
  margin-bottom:20px;
}
.crumb a{color:#C7CEC8;}
.crumb a:hover{color:var(--lime);}
.crumb .sep{color:#57615A;}
.crumb .now{color:var(--lime);}
.hero-band h1{
  color:#fff;
  font-size:clamp(30px,4.4vw,52px);
  max-width:16em;
  margin-bottom:18px;
}
.hero-band .lead{
  max-width:46em;
  color:#BFC7C0;
  font-size:16px;
  line-height:1.85;
  margin-bottom:26px;
}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:14px 30px;
  font-family:var(--font-mono);
  font-size:13px;
  color:#9DA69F;
}
.hero-meta b{display:block;color:var(--lime);font-size:20px;font-weight:700;letter-spacing:.02em;}
.hero-band .actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-band .btn-ghost{border-color:#4A544C;color:#E5E9E4;}
.hero-band .btn-ghost:hover{background:#232C26;border-color:var(--lime);color:#fff;}

/* 通用板块 */
.section{padding:56px 0;}
.section-head{margin-bottom:32px;max-width:52em;}
.section-head .eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  padding:3px 12px;
  background:#fff;
  margin-bottom:14px;
}
.section-head h2{font-size:clamp(23px,3vw,34px);margin-bottom:12px;}
.section-head p{color:var(--muted);margin:0;}

/* 排查三步 */
.steps{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:20px;}
.step-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  padding:26px 24px;
  box-shadow:var(--shadow-1);
  transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.step-card:hover{border-color:var(--lime);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.step-card.is-dark{background:var(--ink);border-color:var(--ink);color:#E9EDE8;}
.step-card.is-dark h3{color:#fff;}
.step-card.is-dark p{color:#AEB6AF;}
.step-num{
  font-family:var(--font-mono);
  font-size:34px;
  font-weight:700;
  line-height:1;
  color:var(--lime);
  margin-bottom:16px;
  display:block;
}
.step-card:not(.is-dark) .step-num{color:var(--ink);opacity:.9;}
.step-card h3{font-size:19px;margin-bottom:10px;}
.step-card p{font-size:15px;color:var(--muted);margin:0;}
@media (max-width:1023px){.steps{grid-template-columns:1fr;}}

/* 编号清单 */
.numbered-list{border-top:1px solid var(--line);}
.num-item{
  display:grid;
  grid-template-columns:120px 1fr;
  gap:28px;
  padding:30px 0;
  border-bottom:1px solid var(--line);
  transition:background-color .2s ease;
}
.num-item:hover{background:rgba(255,255,255,.6);}
.num-item .num{
  font-family:var(--font-mono);
  font-size:clamp(30px,3.6vw,46px);
  font-weight:700;
  line-height:1;
  color:var(--ink);
  opacity:.22;
  transition:color .22s ease,opacity .22s ease;
  padding-top:4px;
}
.num-item:hover .num{color:var(--lime);opacity:1;}
.num-item h3{font-size:20px;margin-bottom:10px;}
.num-item p{color:var(--muted);font-size:15.5px;margin-bottom:14px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;
  align-items:center;
  font-size:12px;
  font-family:var(--font-mono);
  color:var(--muted);
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  padding:3px 11px;
  line-height:1.6;
}
.tag.is-hot{color:#B8410F;border-color:#F3C4B1;background:#FFF3EE;}
@media (max-width:767px){
  .num-item{grid-template-columns:1fr;gap:12px;padding:24px 0;}
  .num-item .num{font-size:30px;opacity:.35;}
}

/* FAQ */
.faq-wrap{max-width:100%;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:22px 4px;
  font-size:17px;
  font-weight:700;
  color:var(--text);
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:22px;
  line-height:1;
  color:var(--muted);
  transition:transform .25s ease,color .2s ease;
}
.faq-item summary:hover{color:var(--ink);}
.faq-item summary:hover::after{color:var(--orange);}
.faq-item[open] summary::after{transform:rotate(45deg);color:var(--lime);}
.faq-item .faq-body{
  padding:0 4px 24px;
  color:var(--muted);
  font-size:15.5px;
  max-width:62em;
}
.faq-item .faq-body p:last-child{margin-bottom:0;}

/* CTA 带 */
.cta-band{
  background:var(--ink);
  color:#F2F4F0;
  border-radius:var(--radius-m);
  padding:44px 36px;
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:32px;
  align-items:center;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(201,242,77,.07) 1px,transparent 1px);
  background-size:100% 26px;
  pointer-events:none;
}
.cta-band > *{position:relative;z-index:2;}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);margin-bottom:12px;}
.cta-band p{color:#AEB6AF;margin:0;max-width:40em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;}
.cta-band .btn-ghost{border-color:#4A544C;color:#E5E9E4;}
.cta-band .btn-ghost:hover{background:#232C26;border-color:var(--lime);color:#fff;}
@media (max-width:1023px){
  .cta-band{grid-template-columns:1fr;padding:34px 24px;}
  .cta-actions{justify-content:flex-start;}
}

/* 页脚 */
.site-footer{
  background:var(--ink);
  color:#AEB6AF;
  padding:60px 0 26px;
  margin-top:64px;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:36px;
  padding-bottom:40px;
  border-bottom:1px solid #232C26;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{background:#1C241F;color:var(--lime);}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text small{color:var(--weak);}
.site-footer p{color:#8E969A;line-height:1.85;max-width:32em;margin:0;}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700;}
.footer-links li{margin-bottom:10px;}
.footer-links a{color:#AEB6AF;font-size:14px;}
.footer-links a:hover{color:var(--lime);}
.footer-links li span{color:#8E969A;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  padding-top:22px;
  font-size:13px;
  color:#7C847E;
}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:639px){
  .footer-grid{grid-template-columns:1fr;gap:28px;}
}

/* 进入视口动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .55s cubic-bezier(.2,.7,.2,1),transform .55s cubic-bezier(.2,.7,.2,1);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}
@media (max-width:639px){
  .section{padding:44px 0;}
  .hero-band{padding:40px 0 44px;}
  body{font-size:16px;}
}