/* roulang page: index */
:root{
  --c-primary:#1E3A34;
  --c-primary-dark:#142823;
  --c-primary-light:#2F5A50;
  --c-accent:#C1663C;
  --c-sand:#B99A5B;
  --c-bg:#F7F4EF;
  --c-card:#FFFFFF;
  --c-soft:#EFEAE1;
  --c-dark:#14171A;
  --c-dark-text:#F2EFE8;
  --c-dark-text2:#A9ADA6;
  --c-text:#14171A;
  --c-text2:#5A5F5A;
  --c-text3:#8A8F88;
  --c-border:#E2DDD3;
  --r-sm:4px;
  --r-md:10px;
  --r-lg:14px;
  --r-xl:20px;
  --sh-1:0 1px 2px rgba(20,23,26,.05);
  --sh-2:0 8px 24px -12px rgba(20,23,26,.18);
  --sh-3:0 16px 40px -20px rgba(20,23,26,.28);
  --e:cubic-bezier(.2,.7,.3,1);
  --font-cn:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
  --sidebar-w:236px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body.site-body{
  margin:0;padding:0;background:var(--c-bg);color:var(--c-text);
  font-family:var(--font-cn);font-size:16px;line-height:1.75;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:none;padding:0;cursor:pointer}
input,textarea,select{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:var(--r-sm)}
::selection{background:var(--c-primary);color:#fff}

/* ---------- Layout shell ---------- */
.content{margin-left:var(--sidebar-w);transition:margin-left .24s var(--e)}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--soft{background:var(--c-soft)}

/* ---------- Sidebar ---------- */
.sidebar{
  position:fixed;inset:0 auto 0 0;width:var(--sidebar-w);z-index:80;
  background:var(--c-card);border-right:1px solid var(--c-border);
  display:flex;flex-direction:column;
}
.brand{height:72px;display:flex;align-items:center;gap:10px;padding:0 18px;border-bottom:1px solid var(--c-border);flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;flex:0 0 auto;border:1.5px solid var(--c-primary);border-radius:6px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-weight:700;font-size:15px;color:var(--c-primary);letter-spacing:0;
}
.brand-text{min-width:0}
.brand-name{display:block;font-size:15px;font-weight:700;letter-spacing:-.01em;line-height:1.25;color:var(--c-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-sub{display:block;font-size:11px;color:var(--c-text3);line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav-list{padding:16px 12px;display:flex;flex-direction:column;gap:4px;overflow-y:auto}
.nav-label{font-size:11px;letter-spacing:.12em;color:var(--c-text3);padding:6px 12px 8px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;height:44px;padding:0 12px;
  border-radius:var(--r-md);font-size:14px;color:var(--c-text2);
  transition:background .16s var(--e),color .16s var(--e);
}
.nav-item svg{width:18px;height:18px;flex:0 0 auto;stroke:currentColor;fill:none;stroke-width:1.6}
.nav-item span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav-item:hover{background:var(--c-bg);color:var(--c-primary)}
.nav-item.active{background:var(--c-soft);color:var(--c-primary);font-weight:600}
.nav-item.active::before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:2px;background:var(--c-primary)}
.side-foot{margin-top:auto;padding:16px;border-top:1px solid var(--c-border);flex:0 0 auto}
.side-card{background:var(--c-bg);border:1px solid var(--c-border);border-radius:var(--r-md);padding:12px}
.side-card .sc-title{font-size:12px;font-weight:600;color:var(--c-primary);line-height:1.5}
.side-card .sc-note{font-size:11px;color:var(--c-text3);line-height:1.6;margin-top:2px}
.overlay{position:fixed;inset:0;background:rgba(20,23,26,.45);opacity:0;visibility:hidden;transition:opacity .24s var(--e),visibility .24s var(--e);z-index:70}
.overlay.show{opacity:1;visibility:visible}

/* ---------- Top bar (mobile/tablet) ---------- */
.topbar{
  display:none;position:sticky;top:0;z-index:60;height:56px;align-items:center;justify-content:space-between;
  padding:0 20px;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--c-border);
}
.topbar .tb-brand{display:flex;align-items:center;gap:8px;min-width:0}
.topbar .tb-name{font-size:14px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.burger{width:40px;height:40px;display:flex;align-items:center;justify-content:center;border:1px solid var(--c-border);border-radius:var(--r-md);background:#fff;flex:0 0 auto}
.burger span{display:block;width:18px;height:1.5px;background:var(--c-text);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:1.5px;background:var(--c-text)}
.burger span::before{top:-5px}
.burger span::after{top:5px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;
  border-radius:var(--r-md);font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .16s var(--e),background .16s var(--e),color .16s var(--e),box-shadow .16s var(--e),border-color .16s var(--e);
  white-space:nowrap;
}
.btn-primary{background:var(--c-primary-dark);color:var(--c-dark-text);box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--c-primary);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-ghost{background:#fff;color:var(--c-text);border:1px solid var(--c-text)}
.btn-ghost:hover{background:var(--c-text);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost:active{transform:translateY(0)}
.btn-outline{background:transparent;color:var(--c-primary);border:1px solid var(--c-accent)}
.btn-outline:hover{background:var(--c-accent);color:#fff;transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.link-underline{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary);
  border-bottom:1px solid var(--c-primary);padding-bottom:2px;transition:border-color .16s var(--e),color .16s var(--e);
}
.link-underline:hover{color:var(--c-accent);border-bottom:2px solid var(--c-accent)}

/* ---------- Hero ---------- */
.hero{padding:72px 0 96px}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.08em;color:var(--c-text3);text-transform:uppercase;font-family:var(--font-num)}
.eyebrow i{display:inline-block;width:1px;height:12px;background:var(--c-border)}
.hero-h1{
  margin:18px 0 20px;font-size:52px;line-height:1.18;font-weight:700;letter-spacing:-.01em;color:var(--c-text);
}
.hero-h1 .h1-line{display:block;margin-top:6px;border-bottom:1px solid var(--c-accent);padding-bottom:10px;width:fit-content;max-width:100%}
.hero-sub{font-size:18px;line-height:1.7;color:var(--c-text2);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.trust-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:40px;border-top:1px solid var(--c-border);padding-top:24px}
.trust-item{padding:0 16px;border-left:1px solid var(--c-border)}
.trust-item:first-child{border-left:none;padding-left:0}
.trust-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:20px;font-weight:700;color:var(--c-primary);line-height:1.2}
.trust-label{font-size:12px;color:var(--c-text3);margin-top:4px;line-height:1.5}
.hero-media{position:relative}
.hero-media-inner{position:relative;border-radius:var(--r-xl);overflow:hidden;background:var(--c-soft);box-shadow:var(--sh-2)}
.hero-media-inner img{width:100%;aspect-ratio:4/5;object-fit:cover;transform:scale(1.02);transition:transform .6s var(--e)}
.hero-media-inner::after{content:"";position:absolute;inset:0;background:rgba(20,40,35,.12)}
.hero-frame{position:absolute;inset:12px;border:1px solid var(--c-sand);border-radius:var(--r-lg);pointer-events:none;z-index:2}
.hero-float{
  position:absolute;right:-24px;bottom:24px;z-index:3;width:264px;max-width:80%;
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-lg);box-shadow:var(--sh-3);
  padding:14px 16px;display:flex;align-items:center;gap:12px;
}
.hero-float .hf-title{font-size:14px;font-weight:600;line-height:1.4}
.hero-float .hf-note{font-size:12px;color:var(--c-text3);line-height:1.5;margin-top:2px}
.hero-float .hf-arrow{margin-left:auto;color:var(--c-primary);font-size:16px}

/* ---------- Section heading ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-title{font-size:32px;line-height:1.25;font-weight:700;letter-spacing:-.01em}
.section-sub{font-size:15px;color:var(--c-text2);margin-top:10px;max-width:640px}
.section-tag{display:inline-block;font-size:12px;letter-spacing:.08em;color:var(--c-accent);font-weight:600;margin-bottom:10px}

/* ---------- Feature cards ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{
  position:relative;background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--r-lg);
  padding:52px 24px 20px;overflow:hidden;transition:transform .2s var(--e),box-shadow .2s var(--e),border-color .2s var(--e);
}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:var(--c-primary)}
.feature-num{
  position:absolute;top:10px;left:20px;font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:40px;font-weight:700;line-height:1;color:rgba(185,154,91,.55);letter-spacing:-.02em;
}
.feature-card h3{font-size:20px;line-height:1.4;font-weight:700;margin-bottom:10px}
.feature-card p{font-size:15px;line-height:1.7;color:var(--c-text2);min-height:76px}
.feature-foot{border-top:1px solid var(--c-border);margin-top:18px;padding-top:14px}
.feature-foot a{font-size:14px;font-weight:600;color:var(--c-primary);display:inline-flex;align-items:center;gap:6px;transition:color .16s var(--e)}
.feature-foot a:hover{color:var(--c-accent)}

/* ---------- Scene ---------- */
.scene-grid{display:grid;grid-template-columns:296px 1fr;gap:40px;align-items:start}
.scene-tabs{display:flex;flex-direction:column;gap:6px}
.scene-tab{
  position:relative;text-align:left;padding:14px 16px;border-radius:var(--r-md);font-size:15px;
  color:var(--c-text2);border:1px solid transparent;transition:background .16s var(--e),color .16s var(--e),border-color .16s var(--e);
}
.scene-tab:hover{background:#fff;border-color:var(--c-border);color:var(--c-primary)}
.scene-tab.active{background:#fff;border-color:var(--c-border);color:var(--c-primary);font-weight:600;box-shadow:var(--sh-1)}
.scene-tab.active::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:2px;background:var(--c-primary)}
.scene-tab small{display:block;font-size:12px;font-weight:400;color:var(--c-text3);margin-top:2px}
.scene-panel{display:none;grid-template-columns:1fr 1fr;gap:32px;align-items:center}
.scene-panel.active{display:grid}
.scene-copy h3{font-size:20px;font-weight:700;margin-bottom:12px}
.scene-copy p{font-size:15px;line-height:1.75;color:var(--c-text2)}
.scene-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.scene-list li{position:relative;padding-left:18px;font-size:14px;color:var(--c-text2);line-height:1.7}
.scene-list li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:1px;background:var(--c-accent)}
.scene-media{border-radius:var(--r-xl);overflow:hidden;background:var(--c-soft);box-shadow:var(--sh-1)}
.scene-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .5s var(--e)}
.scene-media:hover img{transform:scale(1.04)}

/* ---------- Case cards ---------- */
.case-stack{display:flex;flex-direction:column;gap:24px}
.case-card{
  display:grid;grid-template-columns:1fr 1fr;gap:0;background:var(--c-card);border:1px solid var(--c-border);
  border-radius:var(--r-lg);overflow:hidden;transition:transform .2s var(--e),box-shadow .2s var(--e),border-color .2s var(--e);
}
.case-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:var(--c-primary)}
.case-body{padding:32px;display:flex;flex-direction:column;justify-content:center;gap:12px}
.case-media{position:relative;overflow:hidden;background:var(--c-soft);min-height:240px}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--e)}
.case-card:hover .case-media img{transform:scale(1.04)}
.case-card:nth-child(even) .case-media{order:-1}
.badge{
  display:inline-flex;align-items:center;font-size:12px;padding:4px 10px;border-radius:var(--r-sm);
  background:var(--c-soft);color:var(--c-primary);font-weight:600;letter-spacing:.02em;width:fit-content;
}
.case-card h3{font-size:18px;font-weight:700;line-height:1.45}
.case-card p{font-size:14px;line-height:1.7;color:var(--c-text2)}
.case-metrics{display:flex;gap:32px;margin-top:6px;flex-wrap:wrap}
.metric-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:24px;font-weight:700;color:var(--c-primary);line-height:1.2}
.metric-label{font-size:12px;color:var(--c-text3);margin-top:2px}

/* ---------- Plans ---------- */
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.plan-card{
  position:relative;background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--r-lg);
  padding:32px 26px;display:flex;flex-direction:column;transition:transform .2s var(--e),box-shadow .2s var(--e),border-color .2s var(--e);
}
.plan-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.plan-card.featured{border:1px solid var(--c-primary);box-shadow:var(--sh-2)}
.plan-badge{
  position:absolute;top:-12px;left:24px;background:var(--c-accent);color:#fff;font-size:12px;font-weight:600;
  padding:3px 10px;border-radius:var(--r-sm);letter-spacing:.04em;
}
.plan-name{font-size:16px;font-weight:700;color:var(--c-text)}
.plan-desc{font-size:13px;color:var(--c-text3);margin-top:6px;line-height:1.6;min-height:42px}
.plan-price{display:flex;align-items:flex-end;gap:6px;margin:18px 0 4px}
.plan-price .num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:40px;font-weight:700;line-height:1;color:var(--c-primary)}
.plan-price .unit{font-size:13px;color:var(--c-text3);padding-bottom:4px}
.plan-features{margin:20px 0 24px;display:flex;flex-direction:column;gap:10px;border-top:1px solid var(--c-border);padding-top:20px;flex:1}
.plan-features li{position:relative;padding-left:24px;font-size:14px;line-height:1.65;color:var(--c-text2)}
.plan-features li::before{
  content:"";position:absolute;left:0;top:5px;width:12px;height:12px;border:1px solid var(--c-primary-light);
  border-radius:2px;background:
    linear-gradient(45deg,transparent 0 45%,var(--c-primary) 45% 55%,transparent 55%) ,
    linear-gradient(-45deg,transparent 0 55%,var(--c-primary) 55% 65%,transparent 65%);
}

/* ---------- News ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  display:flex;flex-direction:column;background:var(--c-card);border:1px solid var(--c-border);
  border-radius:var(--r-lg);padding:20px;transition:transform .2s var(--e),box-shadow .2s var(--e),border-color .2s var(--e);
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:var(--c-primary)}
.news-thumb{position:relative;border-radius:var(--r-md);overflow:hidden;background:var(--c-soft);aspect-ratio:16/10}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--e)}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-thumb .badge{position:absolute;left:10px;top:10px;background:rgba(255,255,255,.92);color:var(--c-primary);backdrop-filter:blur(4px)}
.news-title{
  font-size:17px;font-weight:700;line-height:1.5;margin:14px 0 8px;color:var(--c-text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:51px;
}
.news-excerpt{
  font-size:14px;line-height:1.65;color:var(--c-text2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:46px;
}
.news-foot{display:flex;align-items:center;justify-content:space-between;margin-top:16px;padding-top:14px;border-top:1px solid var(--c-border)}
.news-date{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:12px;color:var(--c-text3)}
.news-arrow{color:var(--c-primary);font-size:15px;transition:transform .16s var(--e)}
.news-card:hover .news-arrow{transform:translateX(3px)}
.empty-state{
  grid-column:1/-1;border:1px dashed var(--c-border);border-radius:var(--r-lg);
  padding:48px 24px;text-align:center;background:rgba(255,255,255,.6);
}
.empty-state .es-title{font-size:16px;font-weight:600;color:var(--c-primary)}
.empty-state .es-note{font-size:14px;color:var(--c-text3);margin-top:8px}
.empty-state .es-btn{margin-top:20px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--r-md);overflow:hidden;transition:border-color .2s var(--e)}
.faq-item.open{border-color:var(--c-primary);position:relative}
.faq-item.open::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--c-primary)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;text-align:left;font-size:16px;font-weight:600;color:var(--c-text);line-height:1.6;
  transition:color .16s var(--e);
}
.faq-q:hover{color:var(--c-primary)}
.faq-icon{position:relative;width:20px;height:20px;flex:0 0 auto}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--c-primary);transition:transform .24s var(--e),opacity .24s var(--e)}
.faq-icon::before{left:9px;top:2px;width:2px;height:16px}
.faq-icon::after{top:9px;left:2px;height:2px;width:16px}
.faq-item.open .faq-icon::before{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--e)}
.faq-a-inner{padding:0 24px 22px;font-size:15px;line-height:1.8;color:var(--c-text2)}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--c-dark);border-radius:var(--r-xl);
  padding:56px 48px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;opacity:.2;z-index:0;
}
.cta-band > *{position:relative;z-index:1}
.cta-band h2{font-size:32px;line-height:1.3;font-weight:700;color:var(--c-dark-text);letter-spacing:-.01em}
.cta-band p{font-size:15px;line-height:1.75;color:var(--c-dark-text2);margin-top:10px;max-width:620px}
.cta-band .btn-primary{background:var(--c-dark-text);color:var(--c-primary-dark)}
.cta-band .btn-primary:hover{background:#fff;color:var(--c-primary-dark)}

/* ---------- Footer ---------- */
.site-footer{background:var(--c-dark);color:var(--c-dark-text);margin-top:0;border-top:1px solid var(--c-sand)}
.footer-top{padding:64px 0 48px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{border-color:var(--c-dark-text);color:var(--c-dark-text)}
.footer-brand .brand-name{color:var(--c-dark-text);font-size:15px;font-weight:700}
.footer-brand .brand-sub{color:var(--c-dark-text2)}
.footer-desc{font-size:13px;line-height:1.8;color:var(--c-dark-text2);max-width:380px}
.footer-update{font-size:12px;color:var(--c-text3);margin-top:14px;font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.footer-col h4{font-size:12px;letter-spacing:.14em;color:var(--c-dark-text2);font-weight:600;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--c-dark-text2);transition:color .16s var(--e),transform .16s var(--e);display:inline-block}
.footer-col a:hover{color:var(--c-dark-text);transform:translateX(2px)}
.footer-bottom{border-top:1px solid rgba(242,239,232,.12);padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-copy{font-size:12px;color:var(--c-text3);line-height:1.7}
.to-top{
  width:40px;height:40px;border:1px solid rgba(242,239,232,.3);border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:center;color:var(--c-dark-text2);
  transition:border-color .16s var(--e),color .16s var(--e),background .16s var(--e);
}
.to-top:hover{border-color:var(--c-primary-light);color:var(--c-dark-text);background:var(--c-primary)}
.to-top svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--e),transform .6s var(--e)}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1279px) and (min-width:1024px){
  :root{--sidebar-w:76px}
  .brand{justify-content:center;padding:0}
  .brand-text{display:none}
  .nav-label,.nav-item span,.side-foot{display:none}
  .nav-list{padding:16px 10px;align-items:center}
  .nav-item{justify-content:center;padding:0;width:52px}
  .nav-item.active::before{left:-10px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-h1{font-size:44px}
  .hero-media{max-width:640px}
  .hero-float{right:16px}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .case-card{grid-template-columns:1fr}
  .case-media{min-height:220px;order:-1}
  .plan-grid{grid-template-columns:1fr;max-width:560px;margin:0 auto}
  .section-title{font-size:28px}
}

@media (max-width:1023px){
  .content{margin-left:0}
  .sidebar{transform:translateX(-100%);transition:transform .24s var(--e);width:280px;box-shadow:var(--sh-3)}
  .sidebar.open{transform:translateX(0)}
  .topbar{display:flex}
  .hero{padding:48px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-h1{font-size:36px}
  .hero-media-inner img{aspect-ratio:16/9}
  .hero-float{right:16px;bottom:16px}
  .section{padding:72px 0}
  .scene-grid{grid-template-columns:1fr;gap:24px}
  .scene-tabs{flex-direction:row;overflow-x:auto;padding-bottom:4px;gap:8px}
  .scene-tab{flex:0 0 auto;white-space:nowrap}
  .scene-tab small{display:none}
  .scene-panel.active{grid-template-columns:1fr;gap:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .cta-band{padding:40px 28px}
  .cta-band h2{font-size:26px}
}

@media (max-width:767px){
  .wrap{padding:0 20px}
  .hero-h1{font-size:32px}
  .hero-sub{font-size:16px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .trust-bar{grid-template-columns:1fr 1fr;gap:16px 0}
  .trust-item{padding:0 12px}
  .trust-item:nth-child(3){border-left:none;padding-left:0}
  .feature-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .plan-grid{grid-template-columns:1fr;max-width:none}
  .section-title{font-size:26px}
  .section-head{margin-bottom:28px}
  .case-body{padding:24px}
  .faq-q{padding:16px;font-size:15px}
  .faq-a-inner{padding:0 16px 18px;font-size:14px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-top{padding:48px 0 32px}
  .cta-band{padding:32px 22px}
  .cta-band h2{font-size:22px}
  .hero-float{position:static;width:100%;max-width:none;margin-top:16px;right:auto;bottom:auto}
  .plan-card{padding:26px 20px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --c-ink:#1E3A34;
  --c-ink-deep:#142823;
  --c-ink-soft:#2F5A50;
  --c-clay:#C1663C;
  --c-sand:#B99A5B;
  --c-bg:#F7F4EF;
  --c-card:#FFFFFF;
  --c-soft:#EFEAE1;
  --c-dark:#14171A;
  --c-dark-text:#F2EFE8;
  --c-dark-mute:#A9ADA6;
  --c-text:#14171A;
  --c-text2:#5A5F5A;
  --c-text3:#8A8F88;
  --c-border:#E2DDD3;
  --r-xs:4px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --sh-1:0 1px 2px rgba(20,23,26,.05);
  --sh-2:0 8px 24px -12px rgba(20,23,26,.18);
  --sh-3:0 16px 40px -20px rgba(20,23,26,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --f-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --f-num:"Inter","Helvetica Neue",Arial,sans-serif;
  --sidebar-w:236px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--f-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;background:none;border:none;color:inherit}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4{margin:0}
:focus-visible{outline:2px solid var(--c-ink);outline-offset:2px;border-radius:var(--r-xs)}
::selection{background:var(--c-ink);color:var(--c-dark-text)}

/* ---------- shell ---------- */
.shell{margin-left:var(--sidebar-w);display:flex;flex-direction:column;min-height:100vh;transition:margin-left .24s var(--ease)}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}

/* ---------- sidebar ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--c-card);border-right:1px solid var(--c-border);
  display:flex;flex-direction:column;z-index:80;overflow-y:auto;
  transition:transform .24s var(--ease),width .24s var(--ease);
}
.sb-logo{
  height:72px;flex:0 0 auto;display:flex;align-items:center;gap:10px;
  padding:0 20px;border-bottom:1px solid var(--c-border);
}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;flex:0 0 auto;
  border:1.5px solid var(--c-ink);border-radius:6px;
  color:var(--c-ink);font-family:var(--f-num);font-weight:700;font-size:15px;
}
.sb-logo-text{min-width:0}
.sb-logo-name{
  display:block;font-size:14px;font-weight:700;letter-spacing:-.01em;line-height:1.25;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:150px;
}
.sb-logo-sub{display:block;font-size:11px;color:var(--c-text3);letter-spacing:.06em;line-height:1.4}
.sb-nav{padding:16px 12px;display:flex;flex-direction:column;gap:4px;flex:1 1 auto}
.sb-item{
  position:relative;display:flex;align-items:center;gap:12px;
  height:44px;padding:0 12px;border-radius:var(--r-sm);
  font-size:14px;color:var(--c-text2);
  transition:background .16s var(--ease),color .16s var(--ease);
}
.sb-item:hover{background:var(--c-bg);color:var(--c-ink)}
.sb-item.is-active{background:var(--c-soft);color:var(--c-ink);font-weight:600}
.sb-item.is-active::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;
  border-radius:2px;background:var(--c-ink);
}
.sb-ico{display:inline-flex;width:18px;height:18px;flex:0 0 auto;opacity:.9}
.sb-ico svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.sb-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sb-foot{flex:0 0 auto;margin:0 12px 16px;padding:14px;border:1px solid var(--c-border);border-radius:var(--r-md);background:var(--c-bg)}
.sb-foot p{margin:0;font-size:11px;line-height:1.7;color:var(--c-text3)}
.sb-foot p+p{margin-top:2px}
.sb-foot strong{display:block;font-size:12px;color:var(--c-ink);font-weight:600;letter-spacing:.04em}

/* ---------- topbar ---------- */
.topbar{
  display:none;position:sticky;top:0;z-index:70;height:56px;
  align-items:center;justify-content:space-between;gap:12px;padding:0 16px;
  background:rgba(255,255,255,.96);border-bottom:1px solid var(--c-border);
  backdrop-filter:blur(8px);
}
.tb-brand{display:flex;align-items:center;gap:10px;min-width:0}
.tb-name{font-size:14px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.burger{
  width:40px;height:40px;flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--c-border);border-radius:var(--r-sm);background:var(--c-card);
  transition:border-color .16s var(--ease),background .16s var(--ease);
}
.burger:hover{border-color:var(--c-ink-soft);background:var(--c-bg)}
.burger span{display:block;position:relative;width:16px;height:1.5px;border-radius:2px;background:var(--c-text)}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;border-radius:2px;background:var(--c-text);
}
.burger span::before{top:-5px}
.burger span::after{top:5px}
.backdrop{
  position:fixed;inset:0;background:rgba(20,23,26,.45);z-index:75;
  opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s var(--ease);
}
.backdrop.is-open{opacity:1;visibility:visible}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;text-align:center;
  transition:background .16s var(--ease),color .16s var(--ease),transform .16s var(--ease),box-shadow .16s var(--ease),border-color .16s var(--ease);
}
.btn-primary{background:var(--c-ink-deep);color:var(--c-dark-text)}
.btn-primary:hover{background:var(--c-ink);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-outline{background:transparent;border-color:var(--c-text);color:var(--c-text)}
.btn-outline:hover{background:var(--c-text);color:var(--c-dark-text);transform:translateY(-1px)}
.btn-light{background:var(--c-dark-text);color:var(--c-dark)}
.btn-light:hover{transform:translateY(-1px);box-shadow:0 10px 26px -14px rgba(0,0,0,.65)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.link-underline{
  display:inline-block;font-size:14px;font-weight:600;color:var(--c-ink);
  border-bottom:1px solid currentColor;padding-bottom:1px;
  transition:color .16s var(--ease),border-width .16s var(--ease);
}
.link-underline:hover{color:var(--c-clay);border-bottom-width:2px}

/* ---------- main ---------- */
.main{flex:1 1 auto;padding-bottom:80px}

/* ---------- breadcrumbs ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:36px 0 0;font-size:12px;color:var(--c-text3)}
.crumbs a{color:var(--c-text3);transition:color .16s var(--ease)}
.crumbs a:hover{color:var(--c-ink);text-decoration:underline;text-underline-offset:3px}
.crumb-sep{color:var(--c-border)}
.crumb-cur{
  color:var(--c-ink);font-weight:600;max-width:min(62vw,420px);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

/* ---------- article head ---------- */
.art-head{max-width:760px;margin:28px auto 0}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;
  border-radius:var(--r-xs);background:var(--c-soft);color:var(--c-ink);
  font-size:12px;font-weight:600;letter-spacing:.04em;
}
.art-head h1{
  margin:16px 0 0;font-size:36px;line-height:1.28;letter-spacing:-.01em;font-weight:700;
  color:var(--c-text);
}
.art-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:18px;
  font-size:12px;color:var(--c-text3);font-family:var(--f-num);font-variant-numeric:tabular-nums;
}
.art-meta .dot{width:1px;height:12px;background:var(--c-border);display:inline-block}
.art-rule{max-width:760px;height:1px;background:var(--c-border);margin:28px auto 0}

/* ---------- prose ---------- */
.prose{
  max-width:760px;margin:32px auto 0;
  font-size:16px;line-height:1.9;color:var(--c-text2);
}
.prose p{margin:0 0 20px}
.prose h1{font-size:26px;line-height:1.35;margin:44px 0 16px;font-weight:600;color:var(--c-text)}
.prose h2{
  position:relative;margin:48px 0 16px;padding-left:14px;
  font-size:26px;line-height:1.35;font-weight:600;color:var(--c-text);letter-spacing:-.01em;
}
.prose h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;
  border-radius:2px;background:var(--c-ink);
}
.prose h3{margin:36px 0 12px;font-size:20px;line-height:1.45;font-weight:600;color:var(--c-text)}
.prose h4{margin:28px 0 10px;font-size:17px;font-weight:600;color:var(--c-text)}
.prose a{color:var(--c-ink);border-bottom:1px solid currentColor;transition:color .16s var(--ease)}
.prose a:hover{color:var(--c-clay)}
.prose strong{color:var(--c-text);font-weight:600}
.prose ul,.prose ol{margin:0 0 20px;padding-left:0;list-style:none}
.prose ul li{position:relative;padding-left:20px;margin-bottom:10px}
.prose ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;
  border-radius:1px;background:var(--c-clay);
}
.prose ol{counter-reset:prose-ol}
.prose ol li{position:relative;padding-left:28px;margin-bottom:10px;counter-increment:prose-ol}
.prose ol li::before{
  content:counter(prose-ol);
  position:absolute;left:0;top:.28em;width:20px;height:20px;
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--f-num);font-size:11px;font-weight:600;color:var(--c-ink);
  background:var(--c-soft);border-radius:var(--r-xs);
}
.prose blockquote{
  margin:24px 0;padding:20px 22px;background:var(--c-soft);
  border-left:3px solid var(--c-sand);border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--c-text2);font-size:15px;line-height:1.85;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:12px;margin:24px auto;box-shadow:var(--sh-1)}
.prose figure{margin:24px 0}
.prose figcaption{margin-top:10px;font-size:13px;color:var(--c-text3);text-align:center}
.prose table{
  width:100%;border-collapse:collapse;margin:24px 0;
  font-size:14px;line-height:1.7;
}
.prose th,.prose td{border-bottom:1px solid var(--c-border);padding:12px 10px;text-align:left;vertical-align:top}
.prose th{font-size:12px;letter-spacing:.08em;color:var(--c-text3);font-weight:600;white-space:nowrap}
.prose code{
  font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace;
  font-size:.9em;background:var(--c-soft);color:var(--c-ink);
  padding:2px 6px;border-radius:6px;
}
.prose pre{
  margin:24px 0;padding:18px 20px;background:var(--c-soft);
  border-radius:var(--r-sm);overflow-x:auto;font-size:13px;line-height:1.8;
}
.prose pre code{background:none;padding:0;border-radius:0}
.prose hr{border:none;height:1px;background:var(--c-border);margin:36px 0}

/* ---------- empty ---------- */
.empty{
  max-width:760px;margin:32px auto;padding:48px 24px;text-align:center;
  border:1px dashed var(--c-border);border-radius:var(--r-md);background:var(--c-card);
}
.empty-title{margin:0 0 8px;font-size:16px;font-weight:600;color:var(--c-ink)}
.empty-desc{margin:0 0 20px;font-size:14px;color:var(--c-text3);line-height:1.8}

/* ---------- article foot bar ---------- */
.art-foot{
  max-width:760px;margin:40px auto 0;padding-top:24px;
  border-top:1px solid var(--c-border);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
}
.art-tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 12px;
  border:1px solid var(--c-border);border-radius:var(--r-sm);
  font-size:12px;color:var(--c-text2);background:var(--c-card);
  transition:border-color .16s var(--ease),color .16s var(--ease),transform .16s var(--ease);
}
.tag:hover{border-color:var(--c-ink);color:var(--c-ink);transform:translateY(-1px)}

/* ---------- section ---------- */
.section{padding-top:72px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px;flex-wrap:wrap}
.sec-head h2{font-size:26px;line-height:1.3;font-weight:700;letter-spacing:-.01em;color:var(--c-text)}
.sec-head p{margin:8px 0 0;font-size:15px;color:var(--c-text2);max-width:620px}

/* ---------- cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{
  display:flex;flex-direction:column;gap:14px;
  background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--r-md);
  padding:20px;transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:var(--c-ink-soft)}
.pc-media{position:relative;border-radius:var(--r-sm);overflow:hidden;aspect-ratio:16/10;background:var(--c-soft)}
.pc-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.post-card:hover .pc-media img{transform:scale(1.04)}
.pc-badge{
  position:absolute;left:8px;top:8px;height:24px;display:inline-flex;align-items:center;
  padding:0 8px;border-radius:var(--r-xs);
  background:rgba(255,255,255,.92);color:var(--c-ink);font-size:12px;font-weight:600;
}
.pc-title{
  margin:0;font-size:17px;line-height:1.5;font-weight:600;color:var(--c-text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.pc-desc{
  margin:0;font-size:14px;line-height:1.65;color:var(--c-text2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.pc-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:12px;border-top:1px solid var(--c-border);
  font-size:12px;color:var(--c-text3);font-family:var(--f-num);font-variant-numeric:tabular-nums;
}
.pc-arrow{width:18px;height:18px;stroke:var(--c-ink);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s var(--ease)}
.post-card:hover .pc-arrow{transform:translateX(3px)}

/* ---------- steps strip ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:8px}
.step{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--r-md);padding:20px}
.step-num{font-family:var(--f-num);font-size:13px;font-weight:700;color:var(--c-clay);letter-spacing:.08em;font-variant-numeric:tabular-nums}
.step h3{margin:10px 0 6px;font-size:15px;font-weight:600;color:var(--c-text)}
.step p{margin:0;font-size:13px;line-height:1.7;color:var(--c-text2)}

/* ---------- CTA band ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--c-dark);color:var(--c-dark-text);margin-top:72px;padding:64px 0}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:.16;
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{margin:0;font-size:28px;line-height:1.35;font-weight:700;letter-spacing:-.01em;color:var(--c-dark-text);max-width:640px}
.cta-inner p{margin:12px 0 0;font-size:15px;line-height:1.8;color:var(--c-dark-mute);max-width:620px}

/* ---------- footer ---------- */
.site-footer{background:var(--c-dark);color:var(--c-dark-mute);margin-top:auto}
.footer-top{border-top:1px solid var(--c-sand);padding:56px 0 40px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-brand .brand-mark{border-color:var(--c-dark-text);color:var(--c-dark-text)}
.brand-name{display:block;font-size:15px;font-weight:700;color:var(--c-dark-text);letter-spacing:-.01em}
.brand-sub{display:block;font-size:11px;color:var(--c-dark-mute);letter-spacing:.08em}
.footer-desc{margin:16px 0 12px;font-size:13px;line-height:1.85;max-width:430px;color:var(--c-dark-mute)}
.footer-update{margin:0;font-size:12px;color:var(--c-text3);font-family:var(--f-num);font-variant-numeric:tabular-nums}
.footer-col h4{margin:0 0 16px;font-size:12px;font-weight:600;letter-spacing:.16em;color:var(--c-dark-mute)}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col a{
  display:inline-block;font-size:14px;color:var(--c-dark-mute);
  transition:color .16s var(--ease),transform .16s var(--ease);
}
.footer-col a:hover{color:var(--c-dark-text);transform:translateX(2px)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.08);flex-wrap:wrap;
}
.footer-copy{margin:0;font-size:12px;color:var(--c-text3)}
.to-top{
  width:40px;height:40px;flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,.22);border-radius:var(--r-sm);
  transition:border-color .16s var(--ease),background .16s var(--ease),transform .16s var(--ease);
}
.to-top:hover{border-color:var(--c-ink-soft);background:var(--c-ink);transform:translateY(-2px)}
.to-top svg{width:18px;height:18px;stroke:var(--c-dark-text);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ---------- responsive ---------- */
@media (max-width:1279px) and (min-width:1024px){
  :root{--sidebar-w:76px}
  .sb-logo{padding:0;justify-content:center}
  .sb-logo-text{display:none}
  .sb-nav{padding:16px 10px}
  .sb-item{justify-content:center;padding:0;gap:0}
  .sb-label{display:none}
  .sb-foot{display:none}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1023px){
  .sidebar{transform:translateX(-100%);width:280px;box-shadow:var(--sh-3)}
  .sidebar.is-open{transform:translateX(0)}
  .shell{margin-left:0}
  .topbar{display:flex}
  .wrap{padding:0 24px}
  .crumbs{padding-top:24px}
  .art-head h1{font-size:30px}
  .prose h2{font-size:23px;margin-top:40px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand-col{grid-column:1 / -1}
  .cta-band{padding:48px 0}
  .cta-inner h2{font-size:24px}
  .section{padding-top:56px}
}
@media (max-width:767px){
  .wrap{padding:0 20px}
  .art-head h1{font-size:26px}
  .art-meta{font-size:12px;gap:8px}
  .prose{font-size:15.5px;line-height:1.85}
  .prose h2{font-size:21px}
  .prose h3{font-size:18px}
  .card-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .art-foot{flex-direction:column;align-items:flex-start}
  .btn{width:100%}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-inner .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:row;align-items:center}
  .sec-head h2{font-size:22px}
  .crumb-cur{max-width:70vw}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --c-primary:#1E3A34;
  --c-primary-deep:#142823;
  --c-primary-soft:#2F5A50;
  --c-accent:#C1663C;
  --c-sand:#B99A5B;
  --c-bg:#F7F4EF;
  --c-card:#FFFFFF;
  --c-soft:#EFEAE1;
  --c-dark:#14171A;
  --c-dark-text:#F2EFE8;
  --c-dark-muted:#A9ADA6;
  --c-text:#14171A;
  --c-text-2:#5A5F5A;
  --c-text-3:#8A8F88;
  --c-border:#E2DDD3;
  --r-1:4px;
  --r-2:10px;
  --r-3:14px;
  --r-4:20px;
  --sh-1:0 1px 2px rgba(20,23,26,.05);
  --sh-2:0 8px 24px -12px rgba(20,23,26,.18);
  --sh-3:0 16px 40px -20px rgba(20,23,26,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body.drawer-open{overflow:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#D9D3C7;border-radius:8px;border:2px solid var(--c-bg)}
::-webkit-scrollbar-thumb:hover{background:#C4BCAB}
a:focus-visible,button:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}

.wrap{max-width:1240px;margin:0 auto;padding:0 32px}

/* ============ 侧栏 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:236px;
  background:var(--c-card);border-right:1px solid var(--c-border);
  display:flex;flex-direction:column;z-index:70;
  transition:transform .24s var(--ease);
}
.sb-brand{
  height:72px;display:flex;align-items:center;gap:10px;
  padding:0 20px;border-bottom:1px solid var(--c-border);flex:none;
}
.brand-mark{
  width:32px;height:32px;flex:none;border:1.5px solid var(--c-primary);
  border-radius:6px;display:grid;place-items:center;
  font-family:var(--font-num);font-size:15px;font-weight:700;color:var(--c-primary);
  transition:background .16s var(--ease);
}
.sb-brand-text{min-width:0}
.sb-name{display:block;font-size:13px;font-weight:700;line-height:1.35;letter-spacing:-.01em;color:var(--c-text)}
.sb-sub{display:block;font-size:11px;color:var(--c-text-3);line-height:1.4}
.sb-nav{padding:12px;display:flex;flex-direction:column;gap:2px;flex:1;overflow-y:auto}
.sb-link{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 10px;border-radius:var(--r-2);
  font-size:14px;color:var(--c-text-2);
  transition:background .16s var(--ease),color .16s var(--ease);
}
.sb-link svg{width:18px;height:18px;flex:none;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.sb-link:hover{background:var(--c-bg);color:var(--c-primary)}
.sb-link.is-active{background:var(--c-soft);color:var(--c-primary);font-weight:600}
.sb-link.is-active::before{
  content:"";position:absolute;left:-12px;top:10px;bottom:10px;width:3px;
  border-radius:0 3px 3px 0;background:var(--c-primary);
}
.sb-foot{
  flex:none;padding:16px 20px;border-top:1px solid var(--c-border);
  font-size:12px;color:var(--c-text-3);line-height:1.6;
}
.sb-foot .ver{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* ============ 顶栏 ============ */
.topbar{
  display:none;align-items:center;justify-content:space-between;
  height:56px;padding:0 20px;background:var(--c-card);
  border-bottom:1px solid var(--c-border);
  position:sticky;top:0;z-index:80;
}
.tb-brand{display:flex;align-items:center;gap:10px;min-width:0}
.tb-name{
  font-size:13px;font-weight:700;letter-spacing:-.01em;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.burger{
  width:40px;height:40px;flex:none;border:1px solid var(--c-border);
  border-radius:var(--r-2);background:var(--c-card);cursor:pointer;
  display:grid;place-items:center;transition:background .16s var(--ease),border-color .16s var(--ease);
}
.burger:hover{border-color:var(--c-primary);background:var(--c-bg)}
.burger span{display:block;width:16px;height:2px;background:var(--c-primary);position:relative;border-radius:2px}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--c-primary);border-radius:2px;
}
.burger span::before{top:-5px}
.burger span::after{top:5px}

.scrim{
  position:fixed;inset:0;background:rgba(20,23,26,.45);
  opacity:0;pointer-events:none;transition:opacity .24s var(--ease);z-index:60;
}

/* ============ 主区 ============ */
.main{margin-left:236px;min-height:100vh;display:flex;flex-direction:column}

/* ============ 面包屑 ============ */
.crumb-bar{padding:22px 0 0}
.crumb{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--c-text-3)}
.crumb a{color:var(--c-text-3);transition:color .16s var(--ease)}
.crumb a:hover{color:var(--c-primary)}
.crumb .sep{color:#C3BCAE}
.crumb .cur{color:var(--c-primary);font-weight:600}

/* ============ 页头 ============ */
.page-head{padding:36px 0 0}
.head-panel{
  background:var(--c-soft);border:1px solid var(--c-border);
  border-radius:var(--r-4);padding:48px 44px;
  display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;font-weight:600;color:var(--c-accent);
}
.eyebrow .dot{width:5px;height:5px;border-radius:50%;background:var(--c-accent);display:inline-block}
.h1{
  font-size:clamp(30px,3.2vw,42px);line-height:1.2;letter-spacing:-.01em;
  font-weight:700;margin:16px 0 0;color:var(--c-text);
}
.h1 .u{
  display:inline-block;border-bottom:1px solid var(--c-accent);
  padding-bottom:2px;
}
.lead{font-size:16px;line-height:1.8;color:var(--c-text-2);margin:18px 0 0;max-width:56ch}
.head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.head-figure{margin:0}
.head-figure img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-4);box-shadow:var(--sh-2);
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-2);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background .16s var(--ease),color .16s var(--ease),transform .16s var(--ease),box-shadow .16s var(--ease),border-color .16s var(--ease);
}
.btn-primary{background:var(--c-primary-deep);color:var(--c-dark-text)}
.btn-primary:hover{background:var(--c-primary);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-ghost{background:var(--c-card);border-color:var(--c-text);color:var(--c-text)}
.btn-ghost:hover{background:var(--c-text);color:#FFFFFF}
.btn-light{background:var(--c-dark-text);color:var(--c-primary-deep)}
.btn-light:hover{background:#FFFFFF;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-outline-light{background:transparent;border-color:rgba(242,239,232,.45);color:var(--c-dark-text)}
.btn-outline-light:hover{background:rgba(242,239,232,.12);border-color:var(--c-dark-text)}
.btn-sm{height:42px;padding:0 18px;font-size:14px}

/* ============ 板块 ============ */
.sec{padding:72px 0 0}
.sec-head{max-width:740px;margin-bottom:34px}
.sec-eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.08em;font-weight:600;
  color:var(--c-accent);margin-bottom:12px;
}
.sec-head h2{
  font-size:clamp(24px,2.4vw,32px);line-height:1.26;font-weight:700;
  letter-spacing:-.01em;margin:0 0 12px;color:var(--c-text);
}
.sec-head p{font-size:15px;line-height:1.8;color:var(--c-text-2);margin:0}

/* ============ 功能卡 ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.fcard{
  position:relative;background:var(--c-card);border:1px solid var(--c-border);
  border-radius:var(--r-3);padding:24px;overflow:hidden;
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.fcard::before{
  content:attr(data-no);
  position:absolute;top:4px;left:18px;
  font-family:var(--font-num);font-size:56px;font-weight:700;line-height:1;
  color:var(--c-sand);opacity:.24;letter-spacing:-.03em;
}
.fcard:hover{border-color:var(--c-primary);transform:translateY(-3px);box-shadow:var(--sh-2)}
.fcard h3{position:relative;font-size:18px;font-weight:600;margin:34px 0 10px;line-height:1.4}
.fcard p{position:relative;font-size:15px;line-height:1.72;color:var(--c-text-2);margin:0 0 18px}
.fcard .flink{
  position:relative;display:inline-block;padding-top:14px;
  border-top:1px solid var(--c-border);width:100%;
  font-size:14px;font-weight:600;color:var(--c-primary);
  transition:color .16s var(--ease);
}
.fcard .flink:hover{color:var(--c-accent)}

/* ============ 时间轴步骤 ============ */
.steps{list-style:none;margin:0;padding:0;max-width:860px}
.step{
  position:relative;padding:0 0 34px 44px;margin-left:11px;
  border-left:1px solid var(--c-border);
}
.step:last-child{border-left-color:transparent;padding-bottom:0}
.step-dot{
  position:absolute;left:-11px;top:0;width:22px;height:22px;border-radius:50%;
  background:var(--c-card);border:1.5px solid var(--c-primary);
  display:grid;place-items:center;
  font-family:var(--font-num);font-size:11px;font-weight:700;color:var(--c-primary);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.step:hover .step-dot{background:var(--c-primary);color:#fff}
.step h3{font-size:18px;font-weight:600;margin:0 0 8px;line-height:1.45}
.step p{font-size:15px;line-height:1.8;color:var(--c-text-2);margin:0}
.step .step-tag{
  display:inline-block;margin-top:12px;padding:3px 10px;border-radius:var(--r-1);
  background:var(--c-soft);color:var(--c-primary);font-size:12px;letter-spacing:.04em;
}

/* ============ 左右分栏 ============ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split-figure{margin:0}
.split-figure img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-4);box-shadow:var(--sh-2);
}
.split h3{font-size:20px;font-weight:600;margin:0 0 14px;line-height:1.4}
.split .sub-note{font-size:14px;color:var(--c-text-3);margin:16px 0 0}

.check-list{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.check-list li{
  position:relative;padding-left:26px;font-size:15px;
  line-height:1.75;color:var(--c-text-2);
}
.check-list li::before{
  content:"";position:absolute;left:5px;top:11px;width:6px;height:6px;
  background:var(--c-accent);border-radius:1px;
}
.check-list li b{color:var(--c-text);font-weight:600}

/* ============ FAQ ============ */
.faq{max-width:800px;margin:0 auto}
.faq-item{
  background:var(--c-card);border:1px solid var(--c-border);
  border-radius:var(--r-2);margin-bottom:12px;overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item.open{border-color:var(--c-primary);box-shadow:inset 2px 0 0 var(--c-primary)}
.faq-q{
  width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:18px 22px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;line-height:1.6;color:var(--c-text);
}
.faq-q:hover{color:var(--c-primary)}
.faq-plus{
  position:relative;flex:none;width:20px;height:20px;margin-top:2px;
  transition:transform .24s var(--ease);
}
.faq-plus::before,.faq-plus::after{
  content:"";position:absolute;background:var(--c-primary);border-radius:2px;
}
.faq-plus::before{left:9px;top:2px;width:2px;height:16px}
.faq-plus::after{left:2px;top:9px;width:16px;height:2px}
.faq-item.open .faq-plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease)}
.faq-a p{
  margin:0;padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--c-text-2);
}

/* ============ 互链卡 ============ */
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.link-card{
  display:block;background:var(--c-card);border:1px solid var(--c-border);
  border-radius:var(--r-3);padding:26px;
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.link-card:hover{border-color:var(--c-primary);transform:translateY(-3px);box-shadow:var(--sh-2)}
.lc-tag{font-size:12px;letter-spacing:.08em;font-weight:600;color:var(--c-accent)}
.link-card h3{font-size:18px;font-weight:600;margin:10px 0 8px;line-height:1.4}
.link-card p{font-size:14px;line-height:1.75;color:var(--c-text-2);margin:0 0 18px}
.lc-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary)}
.link-card:hover .lc-arrow{color:var(--c-accent)}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;background:var(--c-dark);
  border-radius:var(--r-4);padding:48px 44px;
}
.cta-bg{
  position:absolute;inset:0;
  background:url(/assets/images/backpic/back-3.webp) center/cover no-repeat;
  opacity:.2;
}
.cta-inner{position:relative;z-index:1;max-width:680px}
.cta-inner h2{
  font-size:clamp(22px,2.2vw,30px);line-height:1.3;font-weight:700;
  color:var(--c-dark-text);margin:0 0 12px;letter-spacing:-.01em;
}
.cta-inner p{font-size:15px;line-height:1.8;color:var(--c-dark-muted);margin:0}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:88px;background:var(--c-dark);color:var(--c-dark-text);
  border-top:1px solid var(--c-sand);margin-left:0;
}
.footer-top{padding:60px 0 44px}
.footer-grid{display:grid;grid-template-columns:1.8fr 1fr 1fr;gap:48px}
.footer-brand{display:flex;align-items:center;gap:10px}
.site-footer .brand-mark{border-color:var(--c-dark-text);color:var(--c-dark-text)}
.brand-name{display:block;font-size:14px;font-weight:700;letter-spacing:-.01em;line-height:1.4}
.brand-sub{display:block;font-size:11px;color:var(--c-dark-muted);line-height:1.4}
.footer-desc{font-size:13px;line-height:1.85;color:var(--c-dark-muted);margin:16px 0 12px;max-width:44ch}
.footer-update{font-size:12px;color:var(--c-text-3);margin:0}
.footer-col h4{
  font-size:12px;letter-spacing:.08em;font-weight:600;
  color:var(--c-dark-muted);margin:0 0 16px;
}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.footer-col a{
  display:inline-block;font-size:14px;color:var(--c-dark-muted);
  transition:color .16s var(--ease),transform .16s var(--ease);
}
.footer-col a:hover{color:var(--c-dark-text);transform:translateX(2px)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;border-top:1px solid rgba(242,239,232,.12);
}
.footer-copy{font-size:12px;color:var(--c-text-3);margin:0}
.to-top{
  width:40px;height:40px;flex:none;display:grid;place-items:center;
  border:1px solid rgba(242,239,232,.25);border-radius:var(--r-2);
  color:var(--c-dark-muted);
  transition:color .16s var(--ease),border-color .16s var(--ease),background .16s var(--ease);
}
.to-top svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.to-top:hover{color:var(--c-dark-text);border-color:var(--c-primary-soft);background:rgba(255,255,255,.06)}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1279px) and (min-width:1024px){
  .sidebar{width:76px}
  .sb-brand{justify-content:center;padding:0}
  .sb-brand-text{display:none}
  .sb-nav{padding:12px 10px}
  .sb-link{justify-content:center;padding:0;gap:0}
  .sb-link span{display:none}
  .sb-link.is-active::before{left:-10px}
  .sb-foot{display:none}
  .main{margin-left:76px}
}
@media (max-width:1023px){
  .topbar{display:flex}
  .sidebar{
    width:280px;left:auto;right:0;top:0;bottom:0;
    transform:translateX(100%);box-shadow:var(--sh-3);
  }
  .sidebar.open{transform:translateX(0)}
  .scrim.open{opacity:1;pointer-events:auto}
  .main{margin-left:0}
  .head-panel{grid-template-columns:1fr;gap:28px;padding:36px 28px}
  .head-figure img{aspect-ratio:16/9}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:1fr;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand-col{grid-column:1 / -1}
}
@media (max-width:767px){
  .wrap{padding:0 20px}
  .sec{padding:56px 0 0}
  .page-head{padding:28px 0 0}
  .head-panel{padding:28px 22px;border-radius:var(--r-3)}
  .h1{font-size:30px}
  .lead{font-size:15px;margin-top:14px}
  .head-actions .btn{width:100%}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .cta-band{padding:32px 24px;border-radius:var(--r-3)}
  .cta-actions .btn{width:100%}
  .faq-q{padding:16px}
  .faq-a p{padding:0 16px 18px}
  .step{padding-left:34px}
  .footer-top{padding:44px 0 32px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:14px}
  .site-footer{margin-top:64px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .sidebar,.scrim,.btn,.fcard,.link-card,.faq-a,.faq-plus{transition:none}
}

/* roulang page: category2 */
:root{
  --c-primary:#1E3A34;
  --c-primary-deep:#142823;
  --c-primary-soft:#2F5A50;
  --c-accent:#C1663C;
  --c-sand:#B99A5B;
  --c-bg:#F7F4EF;
  --c-card:#FFFFFF;
  --c-soft:#EFEAE1;
  --c-dark:#14171A;
  --c-ink:#14171A;
  --c-ink-2:#5A5F5A;
  --c-ink-3:#8A8F88;
  --c-line:#E2DDD3;
  --c-light-text:#F2EFE8;
  --c-light-dim:#A9ADA6;
  --r-1:4px;
  --r-2:10px;
  --r-3:14px;
  --r-4:20px;
  --sh-1:0 1px 2px rgba(20,23,26,.05);
  --sh-2:0 8px 24px -12px rgba(20,23,26,.18);
  --sh-3:0 16px 40px -20px rgba(20,23,26,.28);
  --font-cn:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;border:0;background:none;cursor:pointer}
h1,h2,h3,h4,p,ul{margin:0}
ul{list-style:none;padding:0}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}
::selection{background:var(--c-primary);color:var(--c-light-text)}
.wrap{max-width:1160px;margin:0 auto;padding:0 32px}
.shell{margin-left:236px;min-height:100vh}

/* ============ 侧边栏 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:236px;
  background:var(--c-card);
  border-right:1px solid var(--c-line);
  display:flex;flex-direction:column;
  z-index:60;overflow-y:auto;
}
.side-brand{height:72px;display:flex;align-items:center;padding:0 18px;border-bottom:1px solid var(--c-line);flex:0 0 auto}
.brand-link{display:flex;align-items:center;gap:10px;min-width:0}
.brand-mark{
  width:32px;height:32px;flex:0 0 32px;display:grid;place-items:center;
  border:1px solid var(--c-primary);border-radius:6px;
  color:var(--c-primary);font-family:var(--font-num);font-weight:700;font-size:15px;
}
.brand-text{display:flex;flex-direction:column;min-width:0}
.brand-name{font-size:14px;font-weight:700;line-height:1.3;letter-spacing:-.01em;color:var(--c-ink)}
.brand-sub{font-size:11px;line-height:1.4;color:var(--c-ink-3)}
.side-nav{padding:16px 12px;display:flex;flex-direction:column;gap:4px;flex:1 1 auto}
.side-item{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px 0 16px;border-radius:var(--r-2);
  color:var(--c-ink-2);font-size:14px;
  transition:background .16s var(--ease),color .16s var(--ease);
}
.side-item:hover{background:var(--c-bg);color:var(--c-primary)}
.side-item.is-active{background:var(--c-soft);color:var(--c-primary);font-weight:600}
.side-item.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  border-radius:2px;background:var(--c-primary);
}
.side-ico{display:grid;place-items:center;flex:0 0 18px;color:currentColor}
.side-ico svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.side-card{
  flex:0 0 auto;margin:0 12px 16px;padding:14px;
  background:var(--c-soft);border-radius:var(--r-3);
}
.side-card-t{font-size:11px;letter-spacing:.08em;color:var(--c-ink-3)}
.side-card-v{font-family:var(--font-num);font-size:16px;font-weight:700;color:var(--c-primary);font-variant-numeric:tabular-nums;line-height:1.4}
.side-card-d{font-size:11px;color:var(--c-ink-3);line-height:1.5}

/* ============ 顶部栏（移动端） ============ */
.topbar{
  display:none;position:sticky;top:0;z-index:50;
  height:56px;background:var(--c-card);border-bottom:1px solid var(--c-line);
  align-items:center;justify-content:space-between;
  padding:0 16px;gap:12px;
}
.tb-brand{display:flex;align-items:center;gap:8px;min-width:0}
.tb-name{font-size:13px;font-weight:700;color:var(--c-ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.burger{
  width:40px;height:40px;border-radius:var(--r-2);border:1px solid var(--c-line);
  display:grid;place-items:center;flex:0 0 40px;
  transition:border-color .16s var(--ease),background .16s var(--ease);
}
.burger:hover{border-color:var(--c-primary);background:var(--c-bg)}
.burger span{display:block;width:16px;height:1.5px;background:var(--c-ink);position:relative}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--c-ink);
}
.burger span::before{top:-5px}
.burger span::after{top:5px}
.overlay{
  position:fixed;inset:0;background:rgba(20,23,26,.45);
  opacity:0;visibility:hidden;z-index:55;
  transition:opacity .24s var(--ease),visibility .24s var(--ease);
}
.overlay.show{opacity:1;visibility:visible}

/* ============ 面包屑 ============ */
.crumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  padding:28px 0 0;font-size:12px;color:var(--c-ink-3);
}
.crumb a{color:var(--c-ink-3);transition:color .16s var(--ease)}
.crumb a:hover{color:var(--c-primary)}
.crumb .sep{color:var(--c-line)}
.crumb-cur{color:var(--c-primary);font-weight:600}

/* ============ 页头 ============ */
.page-head{padding:24px 0 0}
.ph-grid{
  display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center;
  background:var(--c-soft);border:1px solid var(--c-line);border-radius:var(--r-4);
  padding:44px;margin-top:16px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;color:var(--c-accent);
  margin-bottom:16px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--c-accent)}
.page-head h1{
  font-size:40px;line-height:1.22;font-weight:700;letter-spacing:-.01em;
  color:var(--c-primary-deep);
}
.page-head h1 .u{
  display:block;
  background-image:linear-gradient(var(--c-sand),var(--c-sand));
  background-repeat:no-repeat;background-size:100% 1px;background-position:0 100%;
  padding-bottom:8px;
}
.ph-lead{margin-top:18px;font-size:16px;line-height:1.8;color:var(--c-ink-2);max-width:36em}
.ph-actions{margin-top:24px;display:flex;gap:12px;flex-wrap:wrap}
.ph-media{position:relative}
.ph-media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-4);background:var(--c-soft);
  box-shadow:var(--sh-2);
}
.ph-media::after{
  content:"";position:absolute;inset:12px;border:1px solid rgba(185,154,91,.55);
  border-radius:14px;pointer-events:none;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-2);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .16s var(--ease),background .16s var(--ease),
             color .16s var(--ease),box-shadow .16s var(--ease),border-color .16s var(--ease);
}
.btn-solid{background:var(--c-primary-deep);color:var(--c-light-text);box-shadow:var(--sh-1)}
.btn-solid:hover{background:var(--c-primary);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-solid:active{transform:translateY(0)}
.btn-ghost{
  background:var(--c-card);color:var(--c-ink);border:1px solid var(--c-ink);
}
.btn-ghost:hover{background:var(--c-ink);color:var(--c-light-text);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-light{background:var(--c-light-text);color:var(--c-primary-deep)}
.btn-light:hover{background:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.link-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--c-primary);font-weight:600;font-size:14px;
  border-bottom:1px solid var(--c-sand);padding-bottom:2px;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.link-text:hover{border-bottom-width:2px;border-color:var(--c-accent);color:var(--c-accent)}

/* ============ 区块 ============ */
.block{padding:80px 0}
.block-tight{padding:56px 0}
.sec-head{max-width:640px;margin-bottom:32px}
.sec-head h2{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.01em;color:var(--c-primary-deep)}
.sec-head p{margin-top:12px;font-size:15px;line-height:1.8;color:var(--c-ink-2)}

/* ============ 两栏：目录 + 内容 ============ */
.two-col{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start}
.toc-col{position:relative}
.toc{position:sticky;top:32px;display:flex;flex-direction:column;gap:4px}
.toc-title{font-size:12px;letter-spacing:.08em;color:var(--c-ink-3);padding:0 12px 10px}
.toc-item{
  display:flex;align-items:center;gap:10px;height:36px;padding:0 12px;
  border-radius:var(--r-2);font-size:14px;color:var(--c-ink-2);
  transition:background .16s var(--ease),color .16s var(--ease),box-shadow .16s var(--ease);
}
.toc-item:hover{background:var(--c-soft);color:var(--c-primary)}
.toc-item.is-active{
  background:var(--c-soft);color:var(--c-primary);font-weight:600;
  box-shadow:inset 3px 0 0 var(--c-primary);
}
.toc-num{
  font-family:var(--font-num);font-size:12px;color:var(--c-sand);
  font-variant-numeric:tabular-nums;flex:0 0 auto;
}
.toc-tip{
  margin-top:20px;padding:16px;border:1px solid var(--c-line);
  border-radius:var(--r-3);background:var(--c-card);
  font-size:13px;line-height:1.75;color:var(--c-ink-2);
}
.toc-tip strong{color:var(--c-primary);font-weight:600}

.panel{
  background:var(--c-card);border:1px solid var(--c-line);
  border-radius:var(--r-3);padding:28px 30px;box-shadow:var(--sh-1);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
  scroll-margin-top:32px;
}
.panel + .panel{margin-top:24px}
.panel:hover{border-color:#D3CCBE;box-shadow:var(--sh-2)}
.panel h2{
  position:relative;padding-left:16px;
  font-size:24px;line-height:1.35;font-weight:700;letter-spacing:-.01em;
  color:var(--c-primary-deep);margin-bottom:14px;
}
.panel h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:3px;
  border-radius:2px;background:var(--c-primary);
}
.panel p{font-size:15px;line-height:1.85;color:var(--c-ink-2)}
.panel p + .check-list{margin-top:18px}
.check-list{display:flex;flex-direction:column;gap:10px}
.check-list li{
  position:relative;padding-left:22px;font-size:15px;line-height:1.8;color:var(--c-ink-2);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:12px;width:7px;height:7px;
  border:1px solid var(--c-sand);border-radius:2px;background:var(--c-soft);
}
.panel-note{
  margin-top:18px;padding:14px 16px;border-left:3px solid var(--c-sand);
  background:var(--c-soft);border-radius:0 var(--r-2) var(--r-2) 0;
  font-size:14px;line-height:1.8;color:var(--c-primary-deep);
}

/* ============ 互链卡 ============ */
.cross-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.cross-card{
  display:block;background:var(--c-card);border:1px solid var(--c-line);
  border-radius:var(--r-3);padding:24px;
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.cross-card:hover{
  border-color:var(--c-primary);transform:translateY(-3px);box-shadow:var(--sh-2);
}
.cross-tag{
  display:inline-block;font-size:12px;padding:4px 10px;border-radius:var(--r-1);
  background:var(--c-soft);color:var(--c-primary);letter-spacing:.04em;
}
.cross-card h3{margin-top:14px;font-size:19px;font-weight:700;color:var(--c-primary-deep);letter-spacing:-.01em}
.cross-card p{margin-top:8px;font-size:14px;line-height:1.75;color:var(--c-ink-2)}
.cross-more{
  margin-top:16px;display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;color:var(--c-primary);
}
.back-home{margin-top:28px;font-size:14px;color:var(--c-ink-3)}
.back-home a{color:var(--c-primary);font-weight:600;border-bottom:1px solid var(--c-sand);padding-bottom:1px}
.back-home a:hover{color:var(--c-accent);border-color:var(--c-accent)}

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--c-dark);border-radius:var(--r-4);
  padding:52px 48px;color:var(--c-light-text);
}
.cta-band::after{
  content:"";position:absolute;right:-40px;top:-40px;width:320px;height:320px;
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  opacity:.16;border-radius:50%;pointer-events:none;
}
.cta-inner{position:relative;z-index:1;max-width:620px}
.cta-band h2{font-size:30px;line-height:1.32;font-weight:700;letter-spacing:-.01em}
.cta-band p{margin-top:14px;font-size:15px;line-height:1.85;color:var(--c-light-dim)}
.cta-actions{margin-top:26px;display:flex;gap:12px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-dark);color:var(--c-light-text);margin-top:20px}
.footer-top{border-top:1px solid var(--c-sand);padding:64px 0 48px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px}
.footer-brand{display:flex;align-items:center;gap:10px}
.site-footer .brand-mark{border-color:var(--c-light-text);color:var(--c-light-text)}
.site-footer .brand-name{color:var(--c-light-text);font-size:14px;font-weight:700;display:block;line-height:1.35}
.site-footer .brand-sub{color:var(--c-light-dim);font-size:11px;display:block;line-height:1.4}
.footer-desc{margin-top:18px;font-size:13px;line-height:1.85;color:var(--c-light-dim);max-width:34em}
.footer-update{margin-top:14px;font-size:12px;color:#8A8F88;font-family:var(--font-num);font-variant-numeric:tabular-nums}
.footer-col h4{font-size:12px;letter-spacing:.08em;color:#8A8F88;font-weight:600;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{
  display:inline-block;font-size:14px;color:var(--c-light-dim);
  transition:color .16s var(--ease),transform .16s var(--ease);
}
.footer-col a:hover{color:var(--c-light-text);transform:translateX(2px)}
.footer-bottom{
  border-top:1px solid rgba(226,221,211,.14);
  padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.footer-copy{font-size:12px;color:#8A8F88;line-height:1.7}
.to-top{
  width:40px;height:40px;flex:0 0 40px;border:1px solid #3A3F3C;border-radius:var(--r-2);
  display:grid;place-items:center;color:var(--c-light-dim);
  transition:border-color .16s var(--ease),color .16s var(--ease),transform .16s var(--ease);
}
.to-top:hover{border-color:var(--c-primary-soft);color:var(--c-light-text);transform:translateY(-2px)}
.to-top svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}

/* ============ 响应式 ============ */
@media (min-width:1024px) and (max-width:1279px){
  .sidebar{width:76px}
  .sidebar .brand-text,
  .sidebar .nav-label,
  .sidebar .side-card{display:none}
  .side-brand{padding:0;justify-content:center}
  .side-nav{padding:16px 10px}
  .side-item{justify-content:center;padding:0;gap:0}
  .shell{margin-left:76px}
  .wrap{padding:0 24px}
}
@media (max-width:1023px){
  .sidebar{
    width:280px;transform:translateX(-100%);
    transition:transform .24s var(--ease);
    box-shadow:var(--sh-3);z-index:58;
  }
  .sidebar.open{transform:translateX(0)}
  .shell{margin-left:0}
  .topbar{display:flex}
  .wrap{padding:0 24px}
  .ph-grid{grid-template-columns:1fr;padding:32px;gap:28px}
  .ph-media{order:2}
  .two-col{grid-template-columns:1fr;gap:28px}
  .toc-col{display:none}
  .page-head h1{font-size:34px}
  .block{padding:64px 0}
  .cta-band{padding:40px 32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .footer-brand-col{grid-column:1 / -1}
}
@media (max-width:767px){
  .wrap{padding:0 20px}
  .page-head h1{font-size:30px}
  .ph-grid{padding:24px;border-radius:var(--r-3)}
  .ph-lead{font-size:15px}
  .btn{width:100%}
  .ph-actions{flex-direction:column}
  .sec-head h2{font-size:24px}
  .panel{padding:22px 20px}
  .panel h2{font-size:20px}
  .cross-grid{grid-template-columns:1fr}
  .cta-band{padding:32px 22px;border-radius:var(--r-3)}
  .cta-band h2{font-size:23px}
  .cta-actions{flex-direction:column}
  .block{padding:52px 0}
  .footer-grid{grid-template-columns:1fr}
  .footer-top{padding:48px 0 36px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:14px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --c-primary:#1E3A34;
  --c-primary-dark:#142823;
  --c-primary-light:#2F5A50;
  --c-accent:#C1663C;
  --c-sand:#B99A5B;
  --c-bg:#F7F4EF;
  --c-card:#FFFFFF;
  --c-soft:#EFEAE1;
  --c-ink:#14171A;
  --c-ink-2:#5A5F5A;
  --c-ink-3:#8A8F88;
  --c-line:#E2DDD3;
  --c-dark:#14171A;
  --c-dark-text:#F2EFE8;
  --c-dark-text-2:#A9ADA6;
  --r-sm:4px;
  --r-md:10px;
  --r-lg:14px;
  --r-xl:20px;
  --sh-1:0 1px 2px rgba(20,23,26,.05);
  --sh-2:0 8px 24px -12px rgba(20,23,26,.18);
  --sh-3:0 16px 40px -20px rgba(20,23,26,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sidebar-w:236px;
  --font-cn:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:2px}
::selection{background:var(--c-primary);color:var(--c-dark-text)}

/* ============ 顶部移动栏 ============ */
.topbar{
  display:none;
  position:sticky;
  top:0;
  z-index:60;
  height:56px;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:0 20px;
  background:var(--c-card);
  border-bottom:1px solid var(--c-line);
}
.tb-brand{display:flex;align-items:center;gap:10px;min-width:0}
.tb-name{
  font-size:14px;
  font-weight:700;
  letter-spacing:-.01em;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  color:var(--c-primary);
}
.brand-mark{
  flex:none;
  width:28px;
  height:28px;
  display:grid;
  place-items:center;
  border:1.5px solid var(--c-primary);
  border-radius:6px;
  font-family:var(--font-num);
  font-size:13px;
  font-weight:700;
  color:var(--c-primary);
}
.burger{
  flex:none;
  width:40px;
  height:40px;
  display:grid;
  place-items:center;
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  transition:border-color .16s var(--ease),background .16s var(--ease);
}
.burger span,.burger span::before,.burger span::after{
  display:block;
  width:16px;
  height:1.5px;
  background:var(--c-ink);
  content:"";
}
.burger span{position:relative}
.burger span::before{position:absolute;top:-5px;left:0}
.burger span::after{position:absolute;top:5px;left:0}
.burger:hover{border-color:var(--c-primary);background:var(--c-bg)}

/* ============ 左侧固定导航 ============ */
.sidebar{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:var(--sidebar-w);
  z-index:70;
  display:flex;
  flex-direction:column;
  background:var(--c-card);
  border-right:1px solid var(--c-line);
  transition:transform .24s var(--ease);
}
.side-logo{
  height:72px;
  flex:none;
  display:flex;
  align-items:center;
  gap:10px;
  padding:0 20px;
  border-bottom:1px solid var(--c-line);
}
.side-logo-text{display:flex;flex-direction:column;min-width:0}
.side-brand{font-size:12.5px;font-weight:700;line-height:1.35;letter-spacing:-.01em;color:var(--c-primary)}
.side-sub{font-size:11px;color:var(--c-ink-3);line-height:1.5}
.side-nav{padding:14px 12px;display:flex;flex-direction:column;gap:2px}
.side-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  height:44px;
  padding:0 12px;
  border-radius:var(--r-md);
  font-size:14px;
  color:var(--c-ink-2);
  transition:background .16s var(--ease),color .16s var(--ease);
}
.side-link svg{flex:none;width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.side-link:hover{background:var(--c-bg);color:var(--c-primary)}
.side-link.active{background:var(--c-soft);color:var(--c-primary);font-weight:600}
.side-link.active::before{
  content:"";
  position:absolute;
  left:-12px;
  top:9px;
  bottom:9px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:var(--c-primary);
}
.side-card{
  margin-top:auto;
  padding:16px 20px 22px;
  border-top:1px solid var(--c-line);
  font-size:12px;
  color:var(--c-ink-3);
  line-height:1.7;
}
.side-card-title{font-weight:600;color:var(--c-ink-2)}
.side-card-note{margin-top:2px}

/* ============ 移动抽屉 ============ */
.drawer-mask{
  position:fixed;
  inset:0;
  z-index:80;
  background:rgba(20,23,26,.45);
  opacity:0;
  pointer-events:none;
  transition:opacity .24s var(--ease);
}
.drawer-mask.open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;
  top:0;
  right:0;
  bottom:0;
  z-index:90;
  width:280px;
  display:flex;
  flex-direction:column;
  background:var(--c-card);
  transform:translateX(100%);
  transition:transform .24s var(--ease);
  padding:18px 16px 22px;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:14px;border-bottom:1px solid var(--c-line)}
.drawer-title{font-size:13px;font-weight:700;color:var(--c-primary)}
.drawer-close{
  width:34px;height:34px;display:grid;place-items:center;
  border:1px solid var(--c-line);border-radius:var(--r-md);
  font-size:18px;line-height:1;color:var(--c-ink-2);
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.drawer-close:hover{border-color:var(--c-primary);color:var(--c-primary)}
.drawer-nav{display:flex;flex-direction:column;gap:2px;padding:14px 0}
.drawer-link{
  display:flex;align-items:center;gap:10px;
  height:46px;padding:0 12px;border-radius:var(--r-md);
  font-size:14px;color:var(--c-ink-2);
  transition:background .16s var(--ease),color .16s var(--ease);
}
.drawer-link svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.drawer-link:hover{background:var(--c-bg);color:var(--c-primary)}
.drawer-link.active{background:var(--c-soft);color:var(--c-primary);font-weight:600}
.drawer-foot{margin-top:auto;padding-top:14px;border-top:1px solid var(--c-line);font-size:12px;color:var(--c-ink-3);line-height:1.7}

/* ============ 主内容 ============ */
.main{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}

/* 面包屑 */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;color:var(--c-ink-3);padding-top:26px}
.crumb a{color:var(--c-ink-3);transition:color .16s var(--ease)}
.crumb a:hover{color:var(--c-primary)}
.crumb .sep{color:var(--c-line)}
.crumb .current{color:var(--c-primary);font-weight:600}

/* 页头 */
.page-head{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:32px;
  align-items:center;
  margin-top:18px;
  padding:40px;
  background:var(--c-soft);
  border:1px solid var(--c-line);
  border-radius:var(--r-xl);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--c-sand);
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
}
.eyebrow::before{content:"";width:16px;height:1px;background:var(--c-sand)}
.page-head h1{
  font-size:clamp(28px,3.4vw,40px);
  line-height:1.24;
  font-weight:700;
  letter-spacing:-.01em;
  margin:14px 0 16px;
  color:var(--c-primary-dark);
}
.page-head h1 em{
  font-style:normal;
  box-shadow:inset 0 -1px 0 var(--c-accent);
}
.page-lead{font-size:15px;line-height:1.8;color:var(--c-ink-2);max-width:54ch}
.page-head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.page-head-media{position:relative}
.page-head-media img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  border-radius:var(--r-xl);
  border:1px solid var(--c-line);
  background:var(--c-soft);
  box-shadow:var(--sh-1);
}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r-md);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary{background:var(--c-primary-dark);color:var(--c-dark-text)}
.btn-primary:hover{background:var(--c-primary);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-outline{background:transparent;border:1px solid var(--c-ink);color:var(--c-ink)}
.btn-outline:hover{background:var(--c-ink);color:var(--c-dark-text);transform:translateY(-1px)}
.btn-outline:active{transform:translateY(0)}
.btn-light{background:var(--c-dark-text);color:var(--c-primary-dark)}
.btn-light:hover{background:var(--c-card);transform:translateY(-1px);box-shadow:var(--sh-2)}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--c-primary);
  border-bottom:1px solid currentColor;
  padding-bottom:2px;
  transition:color .16s var(--ease),border-bottom-width .16s var(--ease);
}
.text-link:hover{color:var(--c-accent);border-bottom-width:2px}

/* 板块 */
.sec{margin-top:64px}
.sec-head{max-width:760px}
.sec-head h2{
  font-size:clamp(22px,2.4vw,28px);
  line-height:1.3;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--c-primary-dark);
}
.sec-head p{font-size:15px;line-height:1.8;color:var(--c-ink-2);margin-top:10px}
.sec-mini{
  font-size:12px;
  letter-spacing:.08em;
  color:var(--c-sand);
  font-weight:600;
  margin-bottom:12px;
}

/* 快速定位 */
.quick{border:1px solid var(--c-line);background:var(--c-card);border-radius:var(--r-lg);padding:20px 24px;margin-top:28px;display:flex;flex-wrap:wrap;align-items:center;gap:16px}
.quick-label{font-size:12px;letter-spacing:.08em;color:var(--c-ink-3);font-weight:600;flex:none}
.quick-tabs{display:flex;flex-wrap:wrap;gap:10px}
.quick-tab{
  display:inline-flex;
  align-items:center;
  gap:9px;
  height:40px;
  padding:0 16px;
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  background:var(--c-bg);
  font-size:14px;
  font-weight:600;
  color:var(--c-ink-2);
  transition:border-color .16s var(--ease),color .16s var(--ease),background .16s var(--ease),transform .16s var(--ease);
}
.quick-tab:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-card);transform:translateY(-1px)}
.qt-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:12px;color:var(--c-accent);font-weight:700}

/* 通用卡片网格 */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:28px}
.card{
  display:flex;
  flex-direction:column;
  background:var(--c-card);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  padding:20px;
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.card:hover{border-color:var(--c-primary);transform:translateY(-3px);box-shadow:var(--sh-2)}
.card-media{overflow:hidden;border-radius:var(--r-md);aspect-ratio:16/10;background:var(--c-soft)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.card:hover .card-media img{transform:scale(1.04)}
.card h3{font-size:17px;line-height:1.4;font-weight:600;margin:16px 0 8px;color:var(--c-ink)}
.card p{font-size:14px;line-height:1.68;color:var(--c-ink-2)}
.card-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--c-line);
  font-size:12px;
  color:var(--c-ink-3);
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
}
.card-foot span.tag-inline{font-family:var(--font-cn);color:var(--c-primary);font-weight:600;font-size:12px}

/* 步骤时间轴 */
.steps{position:relative;margin-top:28px;padding-left:28px;border-left:1px solid var(--c-line);max-width:900px}
.step{position:relative;padding-bottom:30px}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";
  position:absolute;
  left:-34px;
  top:7px;
  width:11px;
  height:11px;
  border-radius:50%;
  background:var(--c-card);
  border:2px solid var(--c-primary);
}
.step-num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--c-sand);
}
.step h3{font-size:18px;font-weight:600;line-height:1.45;margin:4px 0 6px;color:var(--c-primary-dark)}
.step p{font-size:15px;line-height:1.8;color:var(--c-ink-2);max-width:72ch}

/* FAQ */
.faq{max-width:800px;margin:28px auto 0}
.faq-group{margin-top:30px;scroll-margin-top:90px}
.faq-group:first-child{margin-top:0}
.faq-group-title{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  letter-spacing:.08em;
  font-weight:600;
  color:var(--c-sand);
  margin-bottom:12px;
}
.faq-group-title::after{content:"";flex:1;height:1px;background:var(--c-line)}
.faq-item{
  position:relative;
  background:var(--c-card);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item:hover{border-color:var(--c-primary-light)}
.faq-item.open{border-color:var(--c-primary);box-shadow:var(--sh-1)}
.faq-item.open::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--c-primary)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 20px;
  text-align:left;
  font-size:16px;
  font-weight:600;
  line-height:1.55;
  color:var(--c-ink);
  transition:color .16s var(--ease);
}
.faq-item.open .faq-q{color:var(--c-primary-dark)}
.faq-icon{position:relative;flex:none;width:20px;height:20px;color:var(--c-primary);transition:transform .24s var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:currentColor;border-radius:1px}
.faq-icon::before{left:9px;top:2px;width:2px;height:16px}
.faq-icon::after{top:9px;left:2px;height:2px;width:16px}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease)}
.faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--c-ink-2)}
.faq-a-inner ul{margin-top:10px}
.faq-a-inner li{position:relative;padding-left:16px;margin-top:6px}
.faq-a-inner li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:5px;
  height:5px;
  border-radius:1px;
  background:var(--c-accent);
}

/* 互链卡 */
.link-cards{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:28px}
.link-card{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:8px;
  padding:24px;
  background:var(--c-card);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.link-card:hover{border-color:var(--c-primary);transform:translateY(-2px);box-shadow:var(--sh-2)}
.tag{
  display:inline-block;
  padding:4px 10px;
  border-radius:var(--r-sm);
  background:var(--c-soft);
  color:var(--c-primary);
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
}
.link-card h3{font-size:18px;font-weight:600;line-height:1.45;color:var(--c-primary-dark)}
.link-card p{font-size:14px;line-height:1.7;color:var(--c-ink-2)}
.link-card .card-arrow{margin-top:8px;font-size:13px;font-weight:600;color:var(--c-primary)}
.back-row{margin-top:24px}

/* CTA */
.cta{
  position:relative;
  overflow:hidden;
  margin-top:64px;
  padding:48px;
  border-radius:var(--r-xl);
  background:var(--c-dark);
  color:var(--c-dark-text);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.cta-copy{position:relative;z-index:2;max-width:640px}
.cta h2{font-size:clamp(22px,2.4vw,26px);line-height:1.35;font-weight:700;letter-spacing:-.01em}
.cta p{font-size:15px;line-height:1.8;color:var(--c-dark-text-2);margin-top:10px}
.cta-actions{position:relative;z-index:2;flex:none}
.cta::after{
  content:"";
  position:absolute;
  right:-30px;
  bottom:-70px;
  width:340px;
  height:240px;
  border-radius:var(--r-xl);
  background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  opacity:.18;
}

/* 页脚 */
.site-footer{
  margin-top:72px;
  background:var(--c-dark);
  color:var(--c-dark-text);
  border-top:1px solid var(--c-sand);
}
.footer-top{padding:52px 0 40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand .brand-mark{border-color:var(--c-dark-text);color:var(--c-dark-text)}
.brand-name{display:block;font-size:15px;font-weight:700;letter-spacing:-.01em;line-height:1.4}
.brand-sub{display:block;font-size:11px;color:var(--c-dark-text-2);line-height:1.6}
.footer-desc{font-size:13px;line-height:1.8;color:var(--c-dark-text-2);margin-top:16px;max-width:44ch}
.footer-update{font-size:12px;color:var(--c-ink-3);margin-top:12px;font-family:var(--font-num);font-variant-numeric:tabular-nums}
.footer-col h4{
  font-size:12px;
  letter-spacing:.08em;
  font-weight:600;
  color:var(--c-ink-3);
  margin-bottom:14px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{
  display:inline-block;
  font-size:14px;
  color:var(--c-dark-text-2);
  transition:color .16s var(--ease),transform .16s var(--ease);
}
.footer-col a:hover{color:var(--c-dark-text);transform:translateX(2px)}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 0 32px;
  border-top:1px solid rgba(242,239,232,.12);
  font-size:12px;
  color:var(--c-ink-3);
}
.footer-copy{line-height:1.7}
.to-top{
  flex:none;
  width:40px;
  height:40px;
  display:grid;
  place-items:center;
  border:1px solid rgba(242,239,232,.25);
  border-radius:var(--r-md);
  color:var(--c-dark-text-2);
  transition:border-color .16s var(--ease),color .16s var(--ease),background .16s var(--ease);
}
.to-top svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.to-top:hover{border-color:var(--c-primary-light);color:var(--c-dark-text);background:var(--c-primary)}

/* 响应式 */
@media (max-width:1279px){
  :root{--sidebar-w:76px}
  .side-logo{justify-content:center;padding:0}
  .side-logo-text{display:none}
  .side-nav{padding:14px 10px}
  .side-link{justify-content:center;padding:0}
  .side-link span{display:none}
  .side-link.active::before{left:-10px}
  .side-card{display:none}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1023px){
  .topbar{display:flex}
  .sidebar{transform:translateX(-100%);width:260px;box-shadow:var(--sh-3)}
  .main{margin-left:0}
  .page-head{grid-template-columns:1fr;padding:28px;gap:24px}
  .page-head-media{order:2}
  .container,.wrap{padding:0 24px}
  .cta{flex-direction:column;align-items:flex-start;padding:36px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
}
@media (max-width:767px){
  .container,.wrap{padding:0 20px}
  .page-head{padding:24px 20px;border-radius:var(--r-lg)}
  .grid-3{grid-template-columns:1fr}
  .link-cards{grid-template-columns:1fr}
  .steps{padding-left:22px}
  .step::before{left:-28px}
  .faq-q{font-size:15px;padding:16px}
  .faq-a-inner{padding:0 16px 18px;font-size:14.5px}
  .quick{padding:16px;gap:12px}
  .quick-tab{height:38px;padding:0 14px;font-size:13px}
  .cta{padding:28px 20px;border-radius:var(--r-lg)}
  .cta::after{width:220px;height:160px;bottom:-50px;right:-30px}
  .btn{width:100%}
  .page-head-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px}
  .sec{margin-top:48px}
  .cta{margin-top:48px}
  .site-footer{margin-top:52px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
}

/* roulang page: category4 */
:root{
  --c-primary:#1E3A34;
  --c-primary-dark:#142823;
  --c-primary-light:#2F5A50;
  --c-accent:#C1663C;
  --c-sand:#B99A5B;
  --c-bg:#F7F4EF;
  --c-card:#FFFFFF;
  --c-soft:#EFEAE1;
  --c-dark:#14171A;
  --c-text:#14171A;
  --c-text-2:#5A5F5A;
  --c-text-3:#8A8F88;
  --c-border:#E2DDD3;
  --c-dark-text:#F2EFE8;
  --c-dark-text-2:#A9ADA6;
  --r-1:4px;
  --r-2:10px;
  --r-3:14px;
  --r-4:20px;
  --sh-1:0 1px 2px rgba(20,23,26,.05);
  --sh-2:0 8px 24px -12px rgba(20,23,26,.18);
  --sh-3:0 16px 40px -20px rgba(20,23,26,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,figure{margin:0}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:var(--r-1)}
::selection{background:rgba(193,102,60,.22)}

/* ---------- 侧栏 App Shell ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:236px;z-index:60;
  display:flex;flex-direction:column;
  background:var(--c-card);
  border-right:1px solid var(--c-border);
}
.sidebar-brand{
  height:72px;flex:none;display:flex;align-items:center;gap:10px;
  padding:0 18px;border-bottom:1px solid var(--c-border);
}
.brand-mark{
  width:34px;height:34px;flex:none;display:grid;place-items:center;
  border:1.5px solid var(--c-primary);border-radius:6px;
  color:var(--c-primary);font-family:var(--font-num);font-weight:700;font-size:16px;
}
.brand-name{display:block;font-size:13px;font-weight:700;line-height:1.35;letter-spacing:-.01em}
.brand-sub{display:block;font-size:11px;line-height:1.4;color:var(--c-text-3);letter-spacing:.04em}
.side-nav{padding:14px 10px;display:flex;flex-direction:column;gap:2px;flex:1;overflow-y:auto}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;
  min-height:44px;padding:8px 12px 8px 14px;border-radius:var(--r-2);
  border-left:3px solid transparent;
  font-size:14px;color:var(--c-text-2);
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.nav-item svg{width:18px;height:18px;flex:none;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.nav-item:hover{background:var(--c-bg);color:var(--c-primary)}
.nav-item.active{background:var(--c-soft);color:var(--c-primary);border-left-color:var(--c-primary);font-weight:600}
.side-card{
  flex:none;margin:12px;padding:14px;border:1px solid var(--c-border);border-radius:var(--r-3);
  background:var(--c-bg);
}
.side-card .sc-title{font-size:12px;font-weight:600;color:var(--c-primary);letter-spacing:.06em}
.side-card .sc-line{font-size:11px;color:var(--c-text-3);line-height:1.7;font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* ---------- 移动端顶栏 ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:70;
  align-items:center;justify-content:space-between;
  padding:0 16px;background:var(--c-card);border-bottom:1px solid var(--c-border);
}
.tb-brand{display:flex;align-items:center;gap:9px;min-width:0}
.tb-brand .brand-mark{width:28px;height:28px;font-size:13px;border-radius:5px}
.tb-name{font-size:13px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:-.01em}
.burger{
  width:40px;height:40px;flex:none;display:grid;place-items:center;
  border:1px solid var(--c-border);border-radius:var(--r-2);
  transition:background .16s var(--ease),border-color .16s var(--ease);
}
.burger:hover{background:var(--c-soft);border-color:var(--c-primary)}
.burger span{display:block;width:16px;height:1.6px;background:var(--c-text);position:relative}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:16px;height:1.6px;background:var(--c-text);
}
.burger span::before{top:-5px}
.burger span::after{top:5px}
.overlay{
  position:fixed;inset:0;background:rgba(20,23,26,.45);z-index:55;
  opacity:0;pointer-events:none;transition:opacity .24s var(--ease);
}
.overlay.open{opacity:1;pointer-events:auto}

/* ---------- 主内容区 ---------- */
.main-col{margin-left:236px;min-height:100vh}
.wrap{max-width:1160px;margin:0 auto;padding:0 32px}
.crumb{padding:22px 0 0}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;color:var(--c-text-3)}
.crumb a{color:var(--c-text-3);transition:color .16s var(--ease)}
.crumb a:hover{color:var(--c-primary)}
.crumb .sep{color:#C9C3B7}
.crumb .cur{color:var(--c-primary);font-weight:600}

/* ---------- 页头 ---------- */
.page-head{background:var(--c-soft);padding:44px 0 52px;margin-top:20px}
.head-grid{display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;color:var(--c-primary);font-weight:600;
  background:rgba(30,58,52,.07);border:1px solid rgba(30,58,52,.14);
  padding:4px 10px;border-radius:var(--r-1);margin-bottom:16px;
}
.eyebrow::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--c-accent)}
.page-title{
  font-size:40px;line-height:1.22;font-weight:700;letter-spacing:-.01em;color:var(--c-text);
}
.page-title span{
  border-bottom:2px solid var(--c-accent);padding-bottom:3px;
}
.head-lead{margin-top:18px;font-size:15px;line-height:1.8;color:var(--c-text-2);max-width:56ch}
.head-lead + .head-lead{margin-top:8px}
.head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.head-figure{position:relative;border-radius:var(--r-4);overflow:hidden;box-shadow:var(--sh-2)}
.head-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#DCD6C9}
.head-figure::after{
  content:"";position:absolute;inset:12px;border:1px solid rgba(185,154,91,.55);
  border-radius:12px;pointer-events:none;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-2);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background .16s var(--ease),color .16s var(--ease),transform .16s var(--ease),box-shadow .16s var(--ease),border-color .16s var(--ease);
}
.btn-primary{background:var(--c-primary-dark);color:var(--c-dark-text);box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--c-primary);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:none;box-shadow:var(--sh-1)}
.btn-ghost{background:var(--c-card);border-color:var(--c-text);color:var(--c-text)}
.btn-ghost:hover{background:var(--c-text);color:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:none}
.btn-sm{height:40px;padding:0 18px;font-size:14px}

/* ---------- 状态条 ---------- */
.status-strip{background:var(--c-card);border-bottom:1px solid var(--c-border);border-top:1px solid var(--c-border)}
.status-inner{display:flex;flex-wrap:wrap;gap:0;padding:0}
.status-item{
  flex:1 1 200px;display:flex;align-items:center;gap:10px;
  padding:16px 20px;border-right:1px solid var(--c-border);
}
.status-item:last-child{border-right:0}
.status-dot{width:7px;height:7px;flex:none;border-radius:50%;background:var(--c-accent);box-shadow:0 0 0 4px rgba(193,102,60,.12)}
.status-num{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:15px;font-weight:700;color:var(--c-primary)}
.status-label{font-size:12px;color:var(--c-text-3)}

/* ---------- 通用板块 ---------- */
.section{padding:72px 0}
.section.tight{padding:52px 0}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.sec-head .h2{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.01em}
.sec-head .sub{margin-top:10px;font-size:15px;color:var(--c-text-2);max-width:62ch}
.h2-line{display:inline-block;border-bottom:1px solid var(--c-sand);padding-bottom:6px}
.link-more{font-size:14px;font-weight:600;color:var(--c-primary);border-bottom:1px solid rgba(30,58,52,.4);padding-bottom:2px;transition:color .16s var(--ease),border-color .16s var(--ease)}
.link-more:hover{color:var(--c-accent);border-bottom-width:2px;border-color:var(--c-accent)}

/* ---------- 对比表 ---------- */
.table-shell{
  background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--r-3);
  box-shadow:var(--sh-1);overflow:hidden;
}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.spec-table{width:100%;border-collapse:collapse;font-size:14px;min-width:760px}
.spec-table thead th{
  text-align:left;padding:14px 18px;font-size:12px;font-weight:600;letter-spacing:.08em;
  color:var(--c-text-3);background:#FBF9F5;border-bottom:1px solid var(--c-border);white-space:nowrap;
}
.spec-table tbody td{
  padding:16px 18px;border-bottom:1px solid var(--c-border);
  color:var(--c-text-2);line-height:1.7;vertical-align:top;
}
.spec-table tbody tr:last-child td{border-bottom:0}
.spec-table tbody tr{transition:background .16s var(--ease)}
.spec-table tbody tr:hover{background:#FBF9F5}
.spec-table td strong{color:var(--c-text);font-weight:600;display:block}
.spec-table td .mono{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:13px;color:var(--c-primary)}
.tag{
  display:inline-block;font-size:12px;line-height:1.6;padding:3px 9px;border-radius:var(--r-1);
  background:var(--c-soft);color:var(--c-primary);font-weight:600;white-space:nowrap;
}
.tag-accent{background:rgba(193,102,60,.12);color:var(--c-accent)}

/* ---------- 三步核对 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px}
.step-card{
  position:relative;background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--r-3);
  padding:22px 20px 20px;box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.step-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:var(--c-primary)}
.step-num{
  position:absolute;right:12px;top:2px;
  font-family:var(--font-num);font-size:44px;font-weight:700;line-height:1;
  color:rgba(185,154,91,.28);letter-spacing:-.03em;
}
.step-card h3{font-size:17px;font-weight:700;margin-bottom:8px;color:var(--c-text);position:relative}
.step-card p{font-size:14px;color:var(--c-text-2);line-height:1.75;position:relative}

/* ---------- 图文卡 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.media-card{
  display:flex;flex-direction:column;background:var(--c-card);
  border:1px solid var(--c-border);border-radius:var(--r-3);overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.media-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:var(--c-primary)}
.media-thumb{position:relative;overflow:hidden;background:#E4DED1}
.media-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s var(--ease)}
.media-card:hover .media-thumb img{transform:scale(1.04)}
.media-badge{
  position:absolute;left:12px;top:12px;font-size:12px;font-weight:600;
  padding:3px 9px;border-radius:var(--r-1);background:rgba(255,255,255,.92);color:var(--c-primary);
}
.media-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.media-body h3{font-size:17px;font-weight:700;line-height:1.5}
.media-body p{font-size:14px;color:var(--c-text-2);line-height:1.72}
.media-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--c-border);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
}
.media-foot .meta{font-size:12px;color:var(--c-text-3);font-family:var(--font-num);font-variant-numeric:tabular-nums}
.arrow{width:18px;height:18px;stroke:var(--c-primary);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s var(--ease)}
.media-card:hover .arrow{transform:translateX(3px)}

/* ---------- 两问 ---------- */
.qa-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.qa-card{
  background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--r-3);
  padding:24px;border-left:3px solid var(--c-sand);box-shadow:var(--sh-1);
}
.qa-card h3{font-size:17px;font-weight:700;margin-bottom:10px}
.qa-card p{font-size:14.5px;color:var(--c-text-2);line-height:1.8}
.qa-card p + p{margin-top:10px}

/* ---------- 互链卡 ---------- */
.rel-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.rel-card{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--r-3);
  padding:22px 24px;box-shadow:var(--sh-1);
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.rel-card:hover{border-color:var(--c-primary);transform:translateY(-3px);box-shadow:var(--sh-2)}
.rel-card .rc-tag{font-size:12px;letter-spacing:.08em;color:var(--c-accent);font-weight:600}
.rel-card h3{font-size:17px;font-weight:700;margin-top:6px}
.rel-card p{font-size:13.5px;color:var(--c-text-2);margin-top:6px}
.rel-card .arrow{flex:none;width:22px;height:22px}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--c-dark);border-radius:var(--r-4);
  padding:44px 40px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;opacity:.16;
}
.cta-copy{position:relative;z-index:1;max-width:600px}
.cta-copy h2{font-size:28px;line-height:1.35;font-weight:700;color:var(--c-dark-text)}
.cta-copy p{margin-top:10px;font-size:15px;color:var(--c-dark-text-2);line-height:1.8}
.cta-band .btn{position:relative;z-index:1}
.cta-band .btn-primary{background:var(--c-dark-text);color:var(--c-primary-dark)}
.cta-band .btn-primary:hover{background:#fff;color:var(--c-primary-dark)}
.back-home{display:flex;justify-content:center;margin-top:28px}
.back-link{font-size:14px;font-weight:600;color:var(--c-primary);border-bottom:1px solid rgba(30,58,52,.4);padding-bottom:2px;transition:border-color .16s var(--ease),color .16s var(--ease)}
.back-link:hover{color:var(--c-accent);border-color:var(--c-accent);border-bottom-width:2px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-dark);color:var(--c-dark-text);margin-top:72px;border-top:1px solid var(--c-sand)}
.footer-top{padding:56px 0 40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:flex-start;gap:12px}
.footer-brand .brand-mark{border-color:var(--c-dark-text);color:var(--c-dark-text);width:36px;height:36px}
.footer-brand .brand-name{color:var(--c-dark-text);font-size:14px}
.footer-brand .brand-sub{color:var(--c-dark-text-2)}
.footer-desc{margin-top:16px;font-size:13px;line-height:1.85;color:var(--c-dark-text-2);max-width:46ch}
.footer-update{margin-top:12px;font-size:12px;color:#8A8F88;font-family:var(--font-num);font-variant-numeric:tabular-nums}
.footer-col h4{font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--c-dark-text-2);margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--c-dark-text-2);display:inline-block;transition:color .16s var(--ease),transform .16s var(--ease)}
.footer-col a:hover{color:var(--c-dark-text);transform:translateX(2px)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0 26px;border-top:1px solid rgba(226,221,211,.14);
}
.footer-copy{font-size:12px;color:#8A8F88;line-height:1.7}
.to-top{
  width:40px;height:40px;flex:none;display:grid;place-items:center;
  border:1px solid rgba(226,221,211,.28);border-radius:var(--r-2);
  transition:border-color .16s var(--ease),background .16s var(--ease);
}
.to-top svg{width:18px;height:18px;stroke:var(--c-dark-text);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.to-top:hover{border-color:var(--c-primary-light);background:rgba(47,90,80,.35)}

/* ---------- 入场动效 ---------- */
@keyframes riseIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.rise-1{animation:riseIn .6s var(--ease) both}
.rise-2{animation:riseIn .6s var(--ease) .08s both}
.rise-3{animation:riseIn .6s var(--ease) .16s both}
.fade-img{animation:fadeIn .6s var(--ease) both}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .sidebar{width:76px}
  .sidebar-brand{height:72px;padding:0;justify-content:center}
  .brand-name,.brand-sub,.side-card{display:none}
  .nav-item{justify-content:center;padding:0;border-left-width:0;border-right:3px solid transparent}
  .nav-item span{display:none}
  .nav-item:hover{border-right-color:var(--c-primary-light)}
  .nav-item.active{border-right-color:var(--c-primary);background:var(--c-soft)}
  .main-col{margin-left:76px}
  .navbar-tip{position:absolute;left:78px;top:50%;transform:translateY(-50%);background:var(--c-dark);color:var(--c-dark-text);font-size:12px;padding:4px 10px;border-radius:var(--r-1);white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .16s var(--ease);z-index:80}
  .nav-item:hover .navbar-tip{opacity:1}
}
@media (max-width:1023px){
  .topbar{display:flex}
  .sidebar{width:280px;transform:translateX(-100%);transition:transform .24s var(--ease);box-shadow:var(--sh-3);border-right:0}
  .sidebar.open{transform:none}
  .sidebar-brand{padding:0 18px;justify-content:flex-start}
  .brand-name,.brand-sub,.side-card{display:block}
  .nav-item{justify-content:flex-start;padding:8px 12px 8px 14px;border-right:0;border-left:3px solid transparent}
  .nav-item span{display:inline}
  .nav-item.active{border-right:0;border-left-color:var(--c-primary)}
  .navbar-tip{display:none}
  .main-col{margin-left:0;padding-top:56px}
  .head-grid{grid-template-columns:1fr;gap:28px}
  .page-title{font-size:32px}
  .steps{grid-template-columns:1fr}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .qa-grid{grid-template-columns:1fr}
  .rel-grid{grid-template-columns:1fr}
  .section{padding:56px 0}
  .section.tight{padding:44px 0}
  .cta-band{padding:36px 26px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand-col{grid-column:1 / -1}
}
@media (max-width:767px){
  .wrap{padding:0 20px}
  .page-head{padding:34px 0 42px}
  .page-title{font-size:28px}
  .head-lead{font-size:14.5px}
  .head-actions .btn{width:100%}
  .sec-head .h2{font-size:24px}
  .card-grid{grid-template-columns:1fr}
  .status-item{flex:1 1 100%;border-right:0;border-bottom:1px solid var(--c-border)}
  .status-item:last-child{border-bottom:0}
  .cta-copy h2{font-size:22px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .qa-card{padding:20px}
  .spec-table thead th,.spec-table tbody td{padding:13px 14px}
}
@media (max-width:419px){
  .page-title{font-size:25px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}