/* roulang page: index */
:root{
  --c-ink:#0B1210;
  --c-primary:#0F3D2E;
  --c-primary-600:#14563F;
  --c-accent:#C6F24E;
  --c-cta:#FF6A2B;
  --c-bg:#F7F6F2;
  --c-surface:#FFFFFF;
  --c-line:#E3E1DA;
  --c-text:#14181A;
  --c-muted:#6E7672;
  --r-s:8px;
  --r-m:14px;
  --r-l:22px;
  --sh-1:0 1px 2px rgba(11,18,16,.06);
  --sh-2:0 8px 24px rgba(11,18,16,.08);
  --sh-3:0 18px 48px rgba(11,18,16,.12);
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-w:248px;
  --mono:"Inter","SFMono-Regular","DejaVu Sans Mono","Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color .2s var(--ease)}
a:hover{text-decoration:underline}
button{font-family:inherit;font-size:inherit}
input{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}

/* ---------- 布局容器 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:32px;padding-right:32px}
.site-main{margin-left:var(--nav-w);min-height:100vh}
.section{padding:96px 0}
.section--bg{background:var(--c-bg)}
.section--surface{background:var(--c-surface)}
.section-head{max-width:760px;margin-bottom:48px}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{font-size:clamp(24px,3vw,36px);font-weight:700;line-height:1.3;margin:14px 0 16px;color:var(--c-ink)}
.section-head p{color:var(--c-muted);font-size:16px;line-height:1.85}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;color:var(--c-primary);background:rgba(15,61,46,.08);padding:6px 14px;border-radius:999px}
.section-head--center .eyebrow{background:rgba(15,61,46,.08)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:12px;border:1.5px solid transparent;
  font-size:16px;font-weight:600;line-height:1;cursor:pointer;
  transition:transform .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
  text-decoration:none;white-space:nowrap;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-600);color:#fff}
.btn-cta{background:var(--c-cta);color:#fff}
.btn-cta:hover{background:#e85c1f;color:#fff}
.btn-ghost{background:transparent;border-color:var(--c-primary);color:var(--c-primary)}
.btn-ghost:hover{background:rgba(15,61,46,.08);color:var(--c-primary)}
.btn-ghost-light{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.btn-ghost-light:hover{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.85)}
.btn-block{width:100%}
.text-link{color:var(--c-primary);font-weight:600;font-size:15px;text-decoration:underline;text-underline-offset:4px}
.text-link:hover{color:var(--c-primary-600)}

/* ---------- 侧边导航 ---------- */
.side-nav{
  position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
  background:var(--c-surface);border-right:1px solid var(--c-line);
  display:flex;flex-direction:column;padding:28px 18px 18px;z-index:60;
}
.side-brand{padding:0 8px 24px;border-bottom:1px solid var(--c-line)}
.brand-mark{display:inline-block;font-size:19px;font-weight:800;color:var(--c-ink);line-height:1.25;text-decoration:none;letter-spacing:-.01em}
.brand-mark:hover{text-decoration:none;color:var(--c-primary)}
.brand-sub{margin-top:8px;font-size:13px;color:var(--c-muted);line-height:1.6}
.side-menu{display:flex;flex-direction:column;gap:4px;padding:20px 0;flex:1 1 auto}
.side-menu a{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:12px 12px 12px 16px;border-radius:10px;font-size:15px;font-weight:500;
  color:var(--c-text);transition:background-color .2s var(--ease),color .2s var(--ease);
}
.side-menu a i{width:18px;text-align:center;font-size:15px;color:var(--c-muted);transition:color .2s var(--ease)}
.side-menu a:hover{background:rgba(15,61,46,.04);color:var(--c-primary);text-decoration:none}
.side-menu a:hover i{color:var(--c-primary)}
.side-menu a.is-active{color:var(--c-primary);font-weight:700;background:rgba(15,61,46,.05)}
.side-menu a.is-active i{color:var(--c-primary)}
.side-menu a.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:2px;background:var(--c-accent);
}
.side-foot{padding-top:16px;border-top:1px solid var(--c-line)}
.side-domain{margin-top:14px;text-align:center;font-size:12px;color:var(--c-muted);font-family:var(--mono)}

/* ---------- 移动端导航 ---------- */
.mobile-bar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;
  background:var(--c-surface);border-bottom:1px solid var(--c-line);
  align-items:center;justify-content:space-between;padding:0 16px;z-index:80;
}
.brand-mark--sm{font-size:16px}
.burger{
  width:44px;height:44px;border:1px solid var(--c-line);background:var(--c-surface);
  border-radius:10px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer;
}
.burger span{display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px;transition:transform .25s var(--ease),opacity .25s var(--ease)}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.is-open span:nth-child(2){opacity:0}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,18,16,.5);opacity:0;visibility:hidden;
  transition:opacity .3s var(--ease),visibility .3s var(--ease);z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:min(84vw,340px);background:var(--c-surface);
  transform:translateX(-100%);transition:transform .3s var(--ease);z-index:100;
  display:flex;flex-direction:column;padding:20px;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--c-line)}
.drawer-close{width:44px;height:44px;border:1px solid var(--c-line);background:transparent;border-radius:10px;font-size:18px;color:var(--c-ink);cursor:pointer}
.drawer-menu{display:flex;flex-direction:column;padding:16px 0;flex:1 1 auto}
.drawer-menu a{display:flex;align-items:center;height:48px;font-size:17px;font-weight:600;color:var(--c-text);border-bottom:1px solid var(--c-line)}
.drawer-menu a.is-active{color:var(--c-primary)}
.drawer-menu a:hover{text-decoration:none;color:var(--c-primary)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(135deg,#0F3D2E 0%,#0B1210 100%);
  padding:96px 0;
}
.hero::after{
  content:"";position:absolute;right:-140px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(198,242,78,.16) 0%,rgba(198,242,78,0) 70%);pointer-events:none;
}
.hero-grid{align-items:center}
.hero-grid>.cell:first-child{padding-right:56px}
.hero-copy{position:relative;z-index:2}
.hero h1{
  font-size:clamp(34px,4.6vw,56px);font-weight:800;line-height:1.15;letter-spacing:-.02em;
  margin:20px 0 20px;color:#fff;
}
.hero .eyebrow{background:rgba(198,242,78,.14);color:var(--c-accent)}
.hero-sub{font-size:17px;line-height:1.85;color:rgba(255,255,255,.74);max-width:30em}
.badge-row{display:flex;flex-wrap:wrap;gap:24px;margin:28px 0 0;padding:0}
.badge-row li{display:flex;align-items:center;gap:8px;font-size:13.5px;color:rgba(255,255,255,.78);position:relative;padding-left:0}
.badge-row li i{color:var(--c-accent);font-size:12px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}
.hero-media{
  position:relative;border-radius:var(--r-l);overflow:hidden;background:var(--c-bg);
  box-shadow:var(--sh-3);aspect-ratio:4/3;
}
.hero-media img{width:100%;height:100%;object-fit:cover}

/* ---------- 功能分组 ---------- */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;margin-bottom:112px}
.feature-row:last-child{margin-bottom:0}
.feature-row--reverse .feature-copy{order:2}
.feature-num{
  display:inline-flex;align-items:center;justify-content:center;min-width:46px;height:32px;padding:0 12px;
  background:var(--c-ink);color:var(--c-accent);border-radius:8px;font-family:var(--mono);
  font-size:14px;font-weight:700;margin-bottom:18px;
}
.feature-copy h3{font-size:20px;font-weight:600;color:var(--c-ink);margin-bottom:12px}
.feature-copy>p{color:var(--c-muted);margin-bottom:20px}
.tick-list li{position:relative;padding-left:26px;margin-bottom:10px;font-size:15px;color:var(--c-text)}
.tick-list li::before{
  content:"";position:absolute;left:2px;top:11px;width:8px;height:8px;border-radius:2px;
  background:var(--c-accent);transform:rotate(45deg);
}
.feature-media{border-radius:var(--r-l);overflow:hidden;background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--sh-2);aspect-ratio:16/11}
.feature-media img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.feature-media:hover img{transform:scale(1.03)}

/* ---------- 场景 Tabs ---------- */
.sc-tabs{margin-top:8px}
.sc-tabbar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px;border-bottom:1px solid var(--c-line);padding-bottom:0}
.sc-tab{
  background:transparent;border:1px solid transparent;border-bottom:3px solid transparent;
  padding:12px 18px;font-size:15px;font-weight:600;color:var(--c-muted);cursor:pointer;
  border-radius:10px 10px 0 0;transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);
}
.sc-tab:hover{color:var(--c-primary);background:rgba(15,61,46,.04)}
.sc-tab.is-active{color:var(--c-primary);border-bottom-color:var(--c-accent);background:rgba(15,61,46,.05)}
.sc-panel{display:none;opacity:0;transition:opacity .24s var(--ease)}
.sc-panel.is-active{display:block;opacity:1}
.sc-panel-inner{
  display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-l);
  padding:28px;box-shadow:var(--sh-1);
}
.sc-media{border-radius:var(--r-m);overflow:hidden;aspect-ratio:16/9;background:var(--c-bg)}
.sc-media img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.sc-media:hover img{transform:scale(1.03)}
.sc-body h3{font-size:20px;font-weight:600;color:var(--c-ink);margin-bottom:12px}
.sc-body p{color:var(--c-muted);margin-bottom:20px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-block;padding:5px 12px;border-radius:999px;font-size:12.5px;font-weight:600;
  background:rgba(15,61,46,.08);color:var(--c-primary);
}
.tag--accent{background:rgba(198,242,78,.32);color:#2c4a10}

/* ---------- 案例 ---------- */
.case-card{
  display:grid;grid-template-columns:40% 60%;border-radius:var(--r-l);overflow:hidden;
  border:1px solid var(--c-line);background:var(--c-surface);box-shadow:var(--sh-2);
}
.case-quote{
  background:linear-gradient(150deg,#0F3D2E 0%,#0B1210 100%);color:#fff;padding:44px 36px;
  display:flex;flex-direction:column;justify-content:center;
}
.quote-mark{font-size:56px;line-height:1;color:var(--c-accent);font-weight:800;margin-bottom:12px}
.case-quote p{font-size:17px;line-height:1.8;color:rgba(255,255,255,.92)}
.case-author{margin-top:22px;font-size:13px;color:rgba(255,255,255,.6)}
.case-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:48px 40px;align-items:center}
.metric-num{display:block;font-family:var(--mono);font-size:clamp(30px,3.4vw,44px);font-weight:700;color:var(--c-primary);line-height:1.1}
.metric-num small{font-size:16px;font-weight:600;margin-left:2px}
.metric-label{display:block;margin-top:10px;font-size:13px;color:var(--c-muted)}

/* ---------- 价格 ---------- */
.plan-grid{display:grid;grid-template-columns:1fr 1.08fr 1fr;gap:24px;align-items:center}
.plan{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-l);
  padding:36px 28px;box-shadow:var(--sh-1);transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.plan:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.plan--featured{
  background:var(--c-ink);color:#fff;border-color:var(--c-ink);box-shadow:var(--sh-3);
  padding:48px 32px;
}
.plan--featured:hover{box-shadow:var(--sh-3)}
.plan-badge{
  display:inline-block;padding:5px 12px;border-radius:999px;background:var(--c-accent);
  color:#233b06;font-size:12.5px;font-weight:700;margin-bottom:16px;
}
.plan h3{font-size:19px;font-weight:600;margin-bottom:8px;color:var(--c-ink)}
.plan--featured h3{color:#fff}
.plan-desc{font-size:14px;color:var(--c-muted);margin-bottom:22px;min-height:44px}
.plan--featured .plan-desc{color:rgba(255,255,255,.62)}
.plan-price{font-family:var(--mono);font-size:38px;font-weight:700;color:var(--c-ink);line-height:1.1}
.plan--featured .plan-price{color:#fff}
.plan-price small{font-size:14px;font-weight:500;color:var(--c-muted);margin-left:6px}
.plan--featured .plan-price small{color:rgba(255,255,255,.6)}
.plan-rows{margin:26px 0;border-top:1px solid var(--c-line)}
.plan--featured .plan-rows{border-top-color:rgba(255,255,255,.14)}
.plan-row{display:flex;justify-content:space-between;gap:14px;padding:13px 0;border-bottom:1px solid var(--c-line);font-size:14px}
.plan--featured .plan-row{border-bottom-color:rgba(255,255,255,.14)}
.plan-row span:first-child{color:var(--c-muted)}
.plan--featured .plan-row span:first-child{color:rgba(255,255,255,.6)}
.plan-row span:last-child{font-weight:600;font-family:var(--mono);text-align:right}

/* ---------- 资讯列表 ---------- */
.grid-x.gapped{margin-left:-12px;margin-right:-12px}
.grid-x.gapped>.cell{padding-left:12px;padding-right:12px;margin-bottom:24px}
.news-card{
  height:100%;display:flex;flex-direction:column;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-m);padding:26px;
  box-shadow:var(--sh-1);transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.news-time{font-size:13px;color:var(--c-muted);font-family:var(--mono)}
.news-title{font-size:17.5px;font-weight:600;line-height:1.55;color:var(--c-ink);margin-bottom:12px}
.news-title a{color:inherit}
.news-title a:hover{color:var(--c-primary);text-decoration:none}
.news-excerpt{
  color:var(--c-muted);font-size:14.5px;line-height:1.75;margin-bottom:20px;flex:1 1 auto;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-more{align-self:flex-start;font-size:14px;font-weight:600;color:var(--c-primary);text-decoration:underline;text-underline-offset:4px}
.news-more:hover{color:var(--c-primary-600)}
.empty-state{
  min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  background:var(--c-surface);border:1px dashed var(--c-line);border-radius:var(--r-m);padding:40px 24px;text-align:center;
}
.empty-state p{color:var(--c-muted);font-size:15px}
.empty-state a{font-size:14px;font-weight:600;color:var(--c-primary);text-decoration:underline;text-underline-offset:4px}

/* ---------- 登录表单 ---------- */
.login-wrap{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.login-intro h2{font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.3;color:var(--c-ink);margin-bottom:16px}
.login-intro>p{color:var(--c-muted);margin-bottom:24px}
.login-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-l);
  padding:36px 32px;box-shadow:var(--sh-2);
}
.field{margin-bottom:20px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--c-text);margin-bottom:8px}
.field input[type="text"],.field input[type="password"]{
  width:100%;height:48px;padding:0 16px;border:1px solid var(--c-line);border-radius:10px;
  font-size:15px;color:var(--c-text);background:var(--c-surface);transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field input::placeholder{color:#A5ACA7}
.field input[type="text"]:focus,.field input[type="password"]:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 2px rgba(15,61,46,.16);
}
.field-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:24px;flex-wrap:wrap}
.check{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--c-muted);cursor:pointer}
.check input{width:16px;height:16px;accent-color:var(--c-primary)}
.field-row a{font-size:14px;font-weight:600;color:var(--c-primary);text-decoration:underline;text-underline-offset:4px}
.form-note{margin-top:16px;font-size:13px;color:var(--c-muted);line-height:1.7}
.form-note.is-alert{color:#7a2f0d;font-weight:600}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px;margin:0 auto;border-top:1px solid var(--c-line)}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:transparent;border:0;padding:22px 0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--c-ink);transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--c-primary)}
.faq-icon{position:relative;flex:0 0 20px;width:20px;height:20px;transition:transform .18s var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--c-primary);border-radius:2px}
.faq-icon::before{left:0;top:9px;width:20px;height:2px}
.faq-icon::after{left:9px;top:0;width:2px;height:20px}
.faq-item.is-open .faq-icon{transform:rotate(180deg)}
.faq-item.is-open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a-inner{padding:0 0 16px;padding-top:16px;font-size:15px;line-height:1.9;color:var(--c-muted);max-width:66em}

/* ---------- CTA 带 ---------- */
.cta-band{background:linear-gradient(135deg,#0F3D2E 0%,#0B1210 100%);color:#fff;padding:72px 0}
.cta-band-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;color:#fff;margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.7);font-size:15px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.72);padding-top:0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1.2fr 1.5fr;gap:48px;padding:72px 0 40px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--c-accent);margin-bottom:18px}
.footer-col p{font-size:14px;line-height:1.85;margin-bottom:8px}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.72);padding:5px 0;transition:color .2s var(--ease)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.brand-mark--light{color:#fff;font-size:20px;font-weight:800;letter-spacing:-.01em}
.brand-mark--light:hover{color:var(--c-accent);text-decoration:none}
.footer-about{margin-top:14px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:28em}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.6);font-family:var(--mono)}
.footer-bottom a:hover{color:#fff}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .24s var(--ease),transform .24s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (min-width:1280px){
  :root{--nav-w:264px}
}
@media (max-width:1023px){
  .side-nav{display:none}
  .site-main{margin-left:0;padding-top:56px}
  .mobile-bar{display:flex}
  .section{padding:64px 0}
  .hero{padding:64px 0}
  .hero-grid>.cell:first-child{padding-right:0;padding-bottom:40px}
  .hero-media{aspect-ratio:16/10}
  .feature-row{grid-template-columns:1fr;gap:32px;margin-bottom:72px}
  .feature-row--reverse .feature-copy{order:0}
  .sc-panel-inner{grid-template-columns:1fr;gap:24px;padding:20px}
  .case-card{grid-template-columns:1fr}
  .case-metrics{padding:36px 28px}
  .plan-grid{grid-template-columns:1fr;gap:20px}
  .plan--featured{padding:36px 28px}
  .login-wrap{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:56px 0 32px}
}
@media (max-width:767px){
  .container{padding-left:16px;padding-right:16px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .hero{padding:48px 0}
  .hero h1{margin:16px 0 16px}
  .hero-actions{gap:12px}
  .hero-actions .btn{flex:1 1 100%}
  .badge-row{gap:14px 20px}
  .sc-tabbar{flex-wrap:nowrap;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
  .sc-tab{flex:0 0 auto;white-space:nowrap}
  .case-metrics{grid-template-columns:1fr;gap:20px}
  .news-card{padding:20px}
  .login-card{padding:26px 20px}
  .cta-band{padding:48px 0}
  .cta-band-inner .btn{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .sc-panel-inner{padding:16px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .reveal{opacity:1 !important;transform:none !important}
}

/* roulang page: article */
:root{
  --c-ink:#0B1210;
  --c-primary:#0F3D2E;
  --c-primary-600:#14563F;
  --c-accent:#C6F24E;
  --c-cta:#FF6A2B;
  --c-bg:#F7F6F2;
  --c-surface:#FFFFFF;
  --c-line:#E3E1DA;
  --c-text:#14181A;
  --c-muted:#6E7672;
  --r-s:8px;
  --r-m:14px;
  --r-l:22px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,18,16,.06);
  --sh-2:0 8px 24px rgba(11,18,16,.08);
  --sh-3:0 18px 48px rgba(11,18,16,.12);
  --sidebar-w:248px;
  --font-sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  --font-mono:"Inter","DejaVu Sans",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote,dl,dd,dt{margin:0;}
h1,h2,h3,h4{font-family:var(--font-sans);color:var(--c-text);letter-spacing:-0.01em;}
ul,ol{padding-left:1.35em;}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease;}
button{font-family:inherit;border:0;background:none;cursor:pointer;color:inherit;}
input,textarea,select{font-family:inherit;font-size:16px;}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px;}
.mono,time{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

/* ============ 侧边导航 ============ */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:var(--c-surface);
  border-right:1px solid var(--c-line);
  padding:32px 20px 24px;
  display:flex;
  flex-direction:column;
  gap:26px;
  overflow-y:auto;
  z-index:50;
}
.sidebar-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;}
.sidebar-close{
  display:none;
  width:44px;height:44px;
  place-items:center;
  border-radius:10px;
  color:var(--c-muted);
  font-size:18px;
  flex:0 0 auto;
  transition:background .18s ease,color .18s ease;
}
.sidebar-close:hover{background:rgba(15,61,46,.06);color:var(--c-primary);}
.brand-mark{display:block;text-decoration:none;}
.brand-mark__main{
  display:block;
  font-size:19px;
  font-weight:800;
  line-height:1.3;
  letter-spacing:-0.02em;
  color:var(--c-primary);
}
.brand-mark__sub{
  display:block;
  margin-top:6px;
  font-size:12px;
  line-height:1.6;
  color:var(--c-muted);
}
.side-menu{display:flex;flex-direction:column;gap:4px;}
.side-menu a{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  padding:11px 12px 11px 15px;
  border-radius:10px;
  font-size:15px;
  color:var(--c-text);
  transition:background .18s ease,color .18s ease;
}
.side-menu a i{width:18px;text-align:center;font-size:14px;color:var(--c-muted);transition:color .18s ease;}
.side-menu a::before{
  content:"";
  position:absolute;left:0;top:50%;
  transform:translateY(-50%);
  width:3px;height:0;
  border-radius:2px;
  background:var(--c-accent);
  transition:height .2s cubic-bezier(.22,.61,.36,1);
}
.side-menu a:hover{background:rgba(15,61,46,.05);color:var(--c-primary-600);}
.side-menu a:hover i{color:var(--c-primary);}
.side-menu a.is-active{background:rgba(15,61,46,.07);color:var(--c-primary);font-weight:600;}
.side-menu a.is-active i{color:var(--c-primary);}
.side-menu a.is-active::before{height:20px;}
.sidebar-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--c-line);}
.sidebar-note{font-size:12px;line-height:1.7;color:var(--c-muted);}
.sidebar-domain{
  display:inline-block;
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--c-primary);
}
.sidebar-domain:hover{text-decoration:underline;text-underline-offset:4px;}

/* ============ 移动端顶栏 ============ */
.mobile-bar{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:56px;
  align-items:center;
  justify-content:space-between;
  padding:0 16px;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  z-index:55;
}
.brand-mark--mobile{font-size:16px;font-weight:800;color:var(--c-primary);letter-spacing:-0.02em;}
.hamburger{
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  border-radius:10px;
  font-size:18px;
  color:var(--c-primary);
  transition:background .18s ease;
}
.hamburger:hover{background:rgba(15,61,46,.06);}
.sidebar-scrim{
  position:fixed;inset:0;
  background:rgba(11,18,16,.48);
  opacity:0;visibility:hidden;
  transition:opacity .26s ease,visibility .26s ease;
  z-index:45;
}
.sidebar-scrim.is-open{opacity:1;visibility:visible;}

/* ============ 内容区 ============ */
.content-wrap{padding-left:var(--sidebar-w);min-height:100vh;}
.container{max-width:1200px;margin:0 auto;padding:0 32px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:12px;
  font-size:15px;
  font-weight:600;
  text-decoration:none;
  transition:transform .18s ease,background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn--ghost{
  background:transparent;
  color:var(--c-primary);
  border:1.5px solid var(--c-primary);
}
.btn--ghost:hover{background:rgba(15,61,46,.08);color:var(--c-primary);text-decoration:none;transform:translateY(-1px);}
.btn--primary{background:var(--c-cta);color:#fff;box-shadow:var(--sh-1);}
.btn--primary:hover{background:#ef5c1d;color:#fff;text-decoration:none;transform:translateY(-1px);box-shadow:var(--sh-2);}
.link-text{
  font-size:15px;
  font-weight:600;
  color:var(--c-primary);
  text-decoration:none;
}
.link-text:hover{text-decoration:underline;text-underline-offset:4px;color:var(--c-primary-600);}

/* ============ 文章页 ============ */
.article-page{padding:48px 0 96px;}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  max-width:760px;
  margin:0 auto 22px;
  font-size:13px;
  line-height:1.6;
  color:var(--c-muted);
}
.breadcrumb a{color:var(--c-muted);}
.breadcrumb a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:4px;}
.breadcrumb .sep{color:#c8c6bf;}
.breadcrumb .current{color:var(--c-text);}

.article-head{max-width:760px;margin:0 auto 30px;}
.article-head h1{
  font-size:clamp(28px,3.4vw,40px);
  font-weight:800;
  line-height:1.24;
  letter-spacing:-0.02em;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  margin-top:18px;
  font-size:13px;
  color:var(--c-muted);
}
.article-meta .tag{
  display:inline-flex;
  align-items:center;
  padding:3px 12px;
  border-radius:var(--r-pill);
  background:rgba(15,61,46,.08);
  color:var(--c-primary);
  font-size:12px;
  font-weight:600;
  line-height:1.7;
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#d3d1ca;flex:0 0 auto;}

.article-body{
  max-width:760px;
  margin:0 auto;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-l);
  box-shadow:var(--sh-1);
  padding:44px 48px 48px;
}
.article-content{font-size:16px;line-height:1.85;color:var(--c-text);}
.article-content > *:first-child{margin-top:0;}
.article-content p{margin:0 0 1.2em;}
.article-content h2{
  margin:48px 0 16px;
  font-size:clamp(22px,2.4vw,28px);
  font-weight:700;
  line-height:1.36;
  letter-spacing:-0.01em;
}
.article-content h3{margin:32px 0 12px;font-size:20px;font-weight:600;line-height:1.45;}
.article-content ul,.article-content ol{margin:0 0 1.2em;padding-left:1.4em;}
.article-content li{margin:.4em 0;}
.article-content blockquote{
  margin:26px 0;
  padding:14px 22px;
  border-left:3px solid var(--c-primary);
  border-radius:0 var(--r-s) var(--r-s) 0;
  background:rgba(15,61,46,.05);
  color:#3c4642;
}
.article-content hr{border:0;border-top:1px solid var(--c-line);margin:34px 0;}
.article-content img{width:100%;height:auto;border-radius:var(--r-m);margin:26px 0;}
.article-content a{color:var(--c-primary);text-decoration:underline;text-underline-offset:4px;}
.article-content a:hover{color:var(--c-primary-600);}
.article-content strong{font-weight:700;color:#0d1a15;}

.empty-state{
  text-align:center;
  padding:56px 16px;
  color:var(--c-muted);
}
.empty-state .empty-icon{
  width:56px;height:56px;
  margin:0 auto 18px;
  display:grid;place-items:center;
  border-radius:50%;
  background:rgba(15,61,46,.07);
  color:var(--c-primary);
  font-size:20px;
}
.empty-state p{font-size:16px;margin-bottom:18px;color:var(--c-muted);}
.empty-state a{
  display:inline-flex;
  align-items:center;
  height:44px;
  padding:0 22px;
  border-radius:12px;
  border:1.5px solid var(--c-primary);
  color:var(--c-primary);
  font-size:14px;
  font-weight:600;
}
.empty-state a:hover{background:rgba(15,61,46,.08);text-decoration:none;}

.related{max-width:760px;margin:64px auto 0;}
.related-head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  padding-bottom:14px;
  border-bottom:1px solid var(--c-line);
}
.related-head h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;letter-spacing:-0.01em;}
.related-head span{font-size:13px;color:var(--c-muted);}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  margin-top:24px;
}
.rec-card{
  display:flex;
  flex-direction:column;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-m);
  overflow:hidden;
  box-shadow:var(--sh-1);
  color:inherit;
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.rec-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#d6d4cc;text-decoration:none;}
.rec-thumb{
  aspect-ratio:16 / 9;
  overflow:hidden;
  background:var(--c-bg);
}
.rec-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .32s ease;}
.rec-card:hover .rec-thumb img{transform:scale(1.03);}
.rec-body{padding:20px;display:flex;flex-direction:column;flex:1 1 auto;}
.rec-body h3{font-size:17px;font-weight:600;line-height:1.5;}
.rec-body p{margin-top:8px;font-size:13px;line-height:1.75;color:var(--c-muted);}
.rec-more{
  margin-top:auto;
  padding-top:16px;
  font-size:13px;
  font-weight:600;
  color:var(--c-primary);
}
.rec-card:hover .rec-more{text-decoration:underline;text-underline-offset:4px;}

.article-foot{
  max-width:760px;
  margin:48px auto 0;
  padding-top:28px;
  border-top:1px solid var(--c-line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:18px 26px;
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--c-ink);
  color:#d6dbd8;
  padding:64px 0 0;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.3fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-col h4{
  font-size:14px;
  font-weight:700;
  color:var(--c-accent);
  margin-bottom:16px;
  letter-spacing:0;
}
.footer-col a,.footer-col p{
  display:block;
  font-size:14px;
  line-height:1.9;
  color:#aeb6b2;
  margin:0 0 8px;
}
.footer-col a{width:fit-content;}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.brand-mark--light{
  display:block;
  font-size:20px;
  font-weight:800;
  color:#fff;
  letter-spacing:-0.02em;
  margin-bottom:14px;
}
.brand-mark--light:hover{text-decoration:none;color:var(--c-accent);}
.footer-about{font-size:13px;line-height:1.85;color:#9aa39f;max-width:300px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:#8d9691;
}
.footer-bottom a{
  font-family:var(--font-mono);
  color:#aeb6b2;
}
.footer-bottom a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}

/* ============ 响应式 ============ */
@media (min-width:1280px){
  :root{--sidebar-w:264px;}
}

@media (max-width:1023px){
  .sidebar{
    width:280px;
    transform:translateX(-100%);
    transition:transform .3s cubic-bezier(.22,.61,.36,1);
    box-shadow:var(--sh-3);
    padding-top:24px;
  }
  .sidebar.is-open{transform:translateX(0);}
  .sidebar-close{display:grid;}
  .mobile-bar{display:flex;}
  .content-wrap{padding-left:0;padding-top:56px;}
  .container{padding:0 24px;}
  .article-page{padding:32px 0 72px;}
  .article-body{padding:32px 26px 36px;border-radius:var(--r-m);}
  .related-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}

@media (max-width:767px){
  .container{padding:0 16px;}
  .article-page{padding:24px 0 60px;}
  .article-head h1{font-size:26px;}
  .article-meta{gap:10px;}
  .article-body{padding:24px 18px 28px;}
  .article-content h2{margin-top:36px;}
  .related{margin-top:48px;}
  .related-grid{grid-template-columns:1fr;}
  .rec-thumb{aspect-ratio:16 / 9;}
  .article-foot{flex-direction:column;align-items:stretch;}
  .article-foot .btn{width:100%;}
  .site-footer{padding-top:48px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --c-ink:#0B1210;
  --c-primary:#0F3D2E;
  --c-primary-600:#14563F;
  --c-accent:#C6F24E;
  --c-cta:#FF6A2B;
  --c-bg:#F7F6F2;
  --c-surface:#FFFFFF;
  --c-line:#E3E1DA;
  --c-text:#14181A;
  --c-muted:#6E7672;
  --r-s:8px;
  --r-m:14px;
  --r-l:22px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,18,16,.06);
  --sh-2:0 8px 24px rgba(11,18,16,.08);
  --sh-3:0 18px 48px rgba(11,18,16,.12);
  --rail-w:248px;
  --font-sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  --font-mono:"Inter","DejaVu Sans Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{margin:0;font-family:var(--font-sans);color:inherit;line-height:1.3}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{text-decoration:underline;text-underline-offset:4px}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}
::selection{background:var(--c-accent);color:var(--c-ink)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.ratio-4x3{aspect-ratio:4/3}
.ratio-16x9{aspect-ratio:16/9}

/* ---------- 左侧竖向导航 ---------- */
.side-rail{
  display:none;
}
.brand-lockup{display:block;padding:4px 0 0}
.brand-lockup__main{
  display:block;
  font-size:19px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--c-primary);
  line-height:1.25;
}
.brand-lockup__sub{
  display:block;
  margin-top:6px;
  font-size:12px;
  color:var(--c-muted);
  letter-spacing:.02em;
}
.side-menu{display:flex;flex-direction:column;gap:4px;margin-top:36px}
.side-menu a{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  height:44px;
  padding:0 14px;
  border-radius:10px;
  font-size:15px;
  color:var(--c-text);
  text-decoration:none;
}
.side-menu a i{width:18px;font-size:15px;color:var(--c-muted);transition:color .2s ease}
.side-menu a:hover{background:rgba(15,61,46,.04);text-decoration:none}
.side-menu a:hover i{color:var(--c-primary)}
.side-menu a.is-active{color:var(--c-primary);font-weight:600;background:rgba(15,61,46,.05)}
.side-menu a.is-active i{color:var(--c-primary)}
.side-menu a.is-active::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:3px;height:22px;
  border-radius:2px;
  background:var(--c-accent);
}
.rail-foot{margin-top:auto;padding-top:24px;border-top:1px solid var(--c-line)}
.rail-domain{
  display:block;
  margin-top:14px;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--c-muted);
  letter-spacing:.02em;
}
@media (min-width:1024px){
  .side-rail{
    position:fixed;
    top:0;left:0;bottom:0;
    width:var(--rail-w);
    display:flex;
    flex-direction:column;
    padding:28px 20px 24px;
    background:var(--c-surface);
    border-right:1px solid var(--c-line);
    z-index:50;
    overflow-y:auto;
  }
  .off-canvas-content,.content-shell{margin-left:var(--rail-w)}
}
@media (min-width:1280px){
  :root{--rail-w:264px}
  .side-rail{padding:32px 24px 28px}
}

/* ---------- 移动端顶栏 + 抽屉 ---------- */
.topbar-mobile{
  position:sticky;
  top:0;
  z-index:40;
  height:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:0 16px;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
}
.topbar-mobile .brand-lockup__main{font-size:17px}
.drawer-toggle{
  width:44px;height:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--c-line);
  border-radius:10px;
  background:var(--c-surface);
  color:var(--c-primary);
  cursor:pointer;
  transition:background .2s ease,border-color .2s ease;
}
.drawer-toggle:hover{background:rgba(15,61,46,.05);border-color:var(--c-primary)}
.mobile-drawer{
  position:fixed;
  top:0;left:0;bottom:0;
  width:min(86vw,340px);
  background:var(--c-surface);
  border-right:1px solid var(--c-line);
  box-shadow:var(--sh-3);
  transform:translateX(-102%);
  transition:transform .28s cubic-bezier(.22,.61,.36,1);
  z-index:60;
  display:flex;
  flex-direction:column;
  padding:18px 18px 22px;
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.drawer-close{
  flex:none;
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--c-line);
  border-radius:10px;
  background:var(--c-surface);
  color:var(--c-text);
  cursor:pointer;
}
.drawer-close:hover{border-color:var(--c-primary);color:var(--c-primary)}
.drawer-nav{display:flex;flex-direction:column;margin-top:22px}
.drawer-nav a{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  min-height:48px;
  font-size:17px;
  color:var(--c-text);
  text-decoration:none;
  border-bottom:1px solid var(--c-line);
}
.drawer-nav a i{color:var(--c-muted);width:20px}
.drawer-nav a.is-active{color:var(--c-primary);font-weight:600}
.drawer-nav a.is-active::after{
  content:"";
  position:absolute;left:-18px;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:2px;background:var(--c-accent);
}
.drawer-foot{margin-top:auto;padding-top:24px}
body.is-locked{overflow:hidden}
@media (min-width:1024px){
  .topbar-mobile,.mobile-drawer{display:none}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 22px;
  border:none;
  border-radius:12px;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  text-decoration:none;
  transition:transform .2s cubic-bezier(.22,.61,.36,1),background-color .2s ease,box-shadow .2s ease,color .2s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn--primary{background:var(--c-cta);color:#fff;box-shadow:var(--sh-1)}
.btn--primary:hover{background:#F45E1C;box-shadow:var(--sh-2)}
.btn--ghost{background:transparent;color:var(--c-primary);border:1.5px solid var(--c-primary)}
.btn--ghost:hover{background:rgba(15,61,46,.08)}
.btn--block{width:100%}
.btn:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--c-muted);
  margin-bottom:20px;
}
.breadcrumbs a{color:var(--c-muted)}
.breadcrumbs a:hover{color:var(--c-primary)}
.breadcrumbs span[aria-hidden]{opacity:.6}

/* ---------- 分类头部 ---------- */
.cat-hero{
  position:relative;
  padding:48px 0 64px;
  background:var(--c-bg);
  border-bottom:1px solid var(--c-line);
  overflow:hidden;
}
.cat-hero::after{
  content:"";
  position:absolute;
  right:-120px;top:-120px;
  width:360px;height:360px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(198,242,78,.28),rgba(198,242,78,0) 70%);
  pointer-events:none;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--c-primary);
  letter-spacing:.02em;
}
.eyebrow::before{
  content:"";
  width:18px;height:3px;border-radius:2px;background:var(--c-accent);
}
.cat-hero h1{
  margin-top:14px;
  font-size:clamp(34px,4.6vw,52px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.15;
  max-width:14em;
}
.cat-hero__lead{
  margin-top:18px;
  max-width:34em;
  font-size:17px;
  line-height:1.85;
  color:var(--c-muted);
}
.anchor-list{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:28px;
}
.anchor-list a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:38px;
  padding:0 16px;
  border:1px solid var(--c-line);
  border-radius:var(--r-pill);
  background:var(--c-surface);
  font-size:14px;
  color:var(--c-text);
  text-decoration:none;
  transition:border-color .2s ease,color .2s ease,transform .2s cubic-bezier(.22,.61,.36,1);
}
.anchor-list a:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-2px)}
.anchor-list a .dot{width:6px;height:6px;border-radius:50%;background:var(--c-accent)}
.media-frame{
  overflow:hidden;
  border-radius:var(--r-l);
  border:1px solid var(--c-line);
  background:var(--c-bg);
  box-shadow:var(--sh-1);
}
.media-frame img{width:100%;height:100%;object-fit:cover;transition:transform .32s ease}
.media-frame:hover img{transform:scale(1.03)}
.hero-media{margin-top:32px}

/* ---------- 板块 ---------- */
.section{padding:64px 0}
.section--white{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section-head{max-width:42em;margin-bottom:40px}
.section-head h2{
  font-size:clamp(24px,3vw,36px);
  font-weight:700;
  letter-spacing:-.01em;
}
.section-head p{margin-top:14px;color:var(--c-muted);font-size:16px}
.section-tag{
  display:inline-block;
  margin-bottom:14px;
  padding:5px 12px;
  border-radius:var(--r-pill);
  background:rgba(15,61,46,.08);
  color:var(--c-primary);
  font-size:13px;
  font-weight:600;
}

/* ---------- 编号要点 ---------- */
.steps{border-top:1px solid var(--c-line)}
.step-row{
  display:grid;
  grid-template-columns:120px 1fr;
  gap:32px;
  padding:32px 0;
  border-bottom:1px solid var(--c-line);
}
.step-num{
  font-family:var(--font-mono);
  font-size:44px;
  font-weight:700;
  line-height:1;
  color:var(--c-primary);
  letter-spacing:-.02em;
}
.step-num small{
  display:block;
  margin-top:10px;
  font-family:var(--font-sans);
  font-size:12px;
  font-weight:500;
  color:var(--c-muted);
  letter-spacing:.04em;
}
.step-body h3{font-size:20px;font-weight:600}
.step-body > p{margin-top:10px;color:var(--c-muted);max-width:42em}
.step-list{margin-top:16px;display:flex;flex-direction:column;gap:8px}
.step-list li{
  position:relative;
  padding-left:20px;
  font-size:15px;
  color:var(--c-text);
}
.step-list li::before{
  content:"";
  position:absolute;
  left:0;top:12px;
  width:8px;height:2px;
  border-radius:2px;
  background:var(--c-accent);
}

/* ---------- 对照说明 ---------- */
.compare-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.compare-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-m);
  padding:28px;
  box-shadow:var(--sh-1);
  transition:box-shadow .24s ease,transform .24s cubic-bezier(.22,.61,.36,1);
}
.compare-card:hover{box-shadow:var(--sh-2);transform:translateY(-4px)}
.compare-card h3{
  display:flex;align-items:center;gap:10px;
  font-size:20px;font-weight:600;
  padding-bottom:16px;
  border-bottom:1px solid var(--c-line);
}
.compare-card h3 i{color:var(--c-primary);font-size:17px}
.spec-list{margin-top:16px}
.spec-list dt{
  font-size:13px;
  color:var(--c-muted);
  margin-top:14px;
}
.spec-list dd{
  margin:4px 0 0;
  font-size:15px;
  color:var(--c-text);
}
.spec-list dd.mono{font-family:var(--font-mono);font-size:14px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px}
.accordion{
  background:transparent;
  border:none;
  margin:0;
}
.accordion .accordion-item{border:none;border-top:1px solid var(--c-line)}
.accordion .accordion-item:last-child{border-bottom:1px solid var(--c-line)}
.accordion .accordion-title{
  position:relative;
  display:block;
  padding:22px 48px 22px 0;
  border:none;
  background:transparent;
  font-size:16px;
  font-weight:600;
  color:var(--c-text);
  line-height:1.6;
}
.accordion .accordion-title:hover,
.accordion .accordion-title:focus{background:transparent;color:var(--c-primary)}
.accordion .accordion-title::before{
  content:"\f067";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  position:absolute;
  right:8px;top:50%;
  transform:translateY(-50%);
  font-size:14px;
  color:var(--c-primary);
  transition:transform .18s ease,opacity .18s ease;
  width:auto;height:auto;margin:0;
}
.accordion .accordion-title[aria-expanded="true"]::before{
  content:"\f068";
}
.accordion .accordion-content{
  display:none;
  padding:0 48px 22px 0;
  border:none;
  background:transparent;
  font-size:15px;
  line-height:1.9;
  color:var(--c-muted);
}
.accordion .accordion-content[aria-hidden="false"]{display:block}

/* ---------- CTA 带 ---------- */
.cta-band{
  padding:72px 0;
  color:#fff;
  background-image:linear-gradient(135deg,rgba(15,61,46,.94),rgba(11,18,16,.96)),url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
}
.cta-band h2{
  font-size:clamp(24px,3vw,34px);
  font-weight:700;
  color:#fff;
  letter-spacing:-.01em;
  max-width:22em;
}
.cta-band p{
  margin-top:16px;
  max-width:38em;
  color:rgba(255,255,255,.76);
  font-size:16px;
}
.cta-actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.cta-band .btn--primary{box-shadow:var(--sh-3)}
.text-link{
  color:#fff;
  font-size:15px;
  text-decoration:underline;
  text-underline-offset:4px;
  text-decoration-thickness:1px;
}
.text-link:hover{color:var(--c-accent)}
.cta-points{
  display:flex;flex-wrap:wrap;gap:20px;
  margin-top:34px;padding-top:24px;
  border-top:1px solid rgba(255,255,255,.14);
}
.cta-points span{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;color:rgba(255,255,255,.8);
  font-family:var(--font-mono);
}
.cta-points i{color:var(--c-accent);font-size:13px}

/* ---------- 互链 ---------- */
.rel-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.rel-card{
  display:flex;
  flex-direction:column;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-m);
  overflow:hidden;
  box-shadow:var(--sh-1);
  text-decoration:none;
  color:inherit;
  transition:box-shadow .24s ease,transform .24s cubic-bezier(.22,.61,.36,1);
}
.rel-card:hover{box-shadow:var(--sh-2);transform:translateY(-4px);text-decoration:none}
.rel-card .media-frame{border:none;border-radius:0;box-shadow:none}
.rel-card__body{padding:24px 28px 28px}
.rel-card__tag{
  display:inline-block;
  padding:4px 12px;
  border-radius:var(--r-pill);
  background:rgba(15,61,46,.08);
  color:var(--c-primary);
  font-size:13px;
  font-weight:600;
}
.rel-card h3{margin-top:14px;font-size:20px;font-weight:600;color:var(--c-text)}
.rel-card p{margin-top:10px;color:var(--c-muted);font-size:15px}
.rel-card .link-arrow{
  margin-top:18px;
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;color:var(--c-primary);
}
.rel-card:hover .link-arrow i{transform:translateX(4px)}
.link-arrow i{transition:transform .2s ease;font-size:13px}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-ink);
  color:rgba(255,255,255,.72);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:var(--c-accent);
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-col a{
  display:block;
  font-size:14px;
  color:rgba(255,255,255,.72);
  margin-bottom:10px;
  text-decoration:none;
}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-col p{font-size:14px;margin-bottom:10px;color:rgba(255,255,255,.72)}
.brand-mark{
  display:inline-block;
  font-size:19px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--c-primary);
  text-decoration:none;
}
.brand-mark--light{color:#fff}
.brand-mark--light:hover{color:#fff;text-decoration:none}
.footer-about{
  margin-top:14px;
  max-width:28em;
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.6);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:22px 0 26px;
  font-size:13px;
  color:rgba(255,255,255,.55);
}
.footer-bottom a{
  font-family:var(--font-mono);
  color:rgba(255,255,255,.72);
  text-decoration:none;
}
.footer-bottom a:hover{color:var(--c-accent)}

/* ---------- 动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .24s cubic-bezier(.22,.61,.36,1),transform .24s cubic-bezier(.22,.61,.36,1);
}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .compare-card,.rel-card,.anchor-list a,.btn{transition:none}
  .compare-card:hover,.rel-card:hover,.anchor-list a:hover,.btn:hover{transform:none}
  .media-frame img{transition:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .container{padding:0 24px}
  .section{padding:56px 0}
  .cat-hero{padding:36px 0 48px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .cat-hero h1{max-width:none}
  .compare-grid,.rel-grid{grid-template-columns:1fr}
  .step-row{
    grid-template-columns:1fr;
    gap:12px;
    padding:26px 0;
  }
  .step-num{font-size:34px}
  .step-num small{margin-top:6px}
  .compare-card{padding:20px}
  .rel-card__body{padding:20px}
  .cta-band{padding:56px 0}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:519px){
  .cat-hero h1{font-size:32px}
  .anchor-list a{height:36px;font-size:13px;padding:0 13px}
  .btn{width:100%}
  .cta-actions{gap:12px}
}

/* roulang page: category2 */
:root{
  --c-ink:#0B1210;
  --c-primary:#0F3D2E;
  --c-primary-600:#14563F;
  --c-accent:#C6F24E;
  --c-cta:#FF6A2B;
  --c-cta-600:#F05B1B;
  --c-bg:#F7F6F2;
  --c-surface:#FFFFFF;
  --c-line:#E3E1DA;
  --c-text:#14181A;
  --c-muted:#6E7672;
  --r-s:8px;
  --r-m:14px;
  --r-l:22px;
  --sh-1:0 1px 2px rgba(11,18,16,.06);
  --sh-2:0 8px 24px rgba(11,18,16,.08);
  --sh-3:0 18px 48px rgba(11,18,16,.12);
  --nav-w:248px;
  --font-sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  --font-mono:"Inter","DejaVu Sans Mono",ui-monospace,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease}
a:hover{text-decoration:underline;text-underline-offset:4px}
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--c-accent);
  outline-offset:2px;
  border-radius:4px;
}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--c-text);line-height:1.3}
p{margin:0}
ul,ol{margin:0;padding:0}
li{list-style:none}
button{font-family:inherit;cursor:pointer}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}

/* ============ 桌面左侧竖向导航 ============ */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--nav-w);
  background:var(--c-surface);
  border-right:1px solid var(--c-line);
  display:flex;
  flex-direction:column;
  padding:28px 20px 20px;
  z-index:60;
}
.brand{display:block;padding:0 8px 20px;border-bottom:1px solid var(--c-line);text-decoration:none}
.brand:hover{text-decoration:none}
.brand-name{
  display:block;
  font-size:19px;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--c-primary);
  line-height:1.25;
}
.brand-tag{
  display:block;
  margin-top:6px;
  font-size:12px;
  color:var(--c-muted);
  letter-spacing:.02em;
}
.side-menu{display:flex;flex-direction:column;gap:4px;margin-top:22px;flex:1 1 auto}
.side-menu a{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  padding:12px 14px;
  border-radius:var(--r-s);
  font-size:14.5px;
  color:#3C4441;
  text-decoration:none;
  transition:background .2s ease,color .2s ease;
}
.side-menu a i{width:18px;text-align:center;font-size:15px;color:var(--c-muted);transition:color .2s ease}
.side-menu a:hover{background:rgba(15,61,46,.04);color:var(--c-primary);text-decoration:none}
.side-menu a:hover i{color:var(--c-primary-600)}
.side-menu a.is-active{color:var(--c-primary);font-weight:600;background:rgba(15,61,46,.05)}
.side-menu a.is-active i{color:var(--c-primary)}
.side-menu a.is-active::before{
  content:"";
  position:absolute;
  left:0;top:10px;bottom:10px;
  width:3px;
  border-radius:999px;
  background:var(--c-accent);
}
.sidebar-foot{margin-top:20px;padding-top:18px;border-top:1px solid var(--c-line)}
.sidebar-domain{
  display:block;
  margin-top:14px;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--c-muted);
  text-align:center;
}
.sidebar-note{font-size:12px;color:var(--c-muted);line-height:1.6;margin-bottom:12px}

/* ============ 移动顶部栏 + 抽屉 ============ */
.mobile-bar{
  display:none;
  position:sticky;
  top:0;
  z-index:70;
  height:56px;
  align-items:center;
  justify-content:space-between;
  padding:0 16px;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
}
.brand--mobile{padding:0;border:0}
.brand--mobile .brand-name{font-size:16px}
.burger{
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  background:transparent;
  border:1px solid var(--c-line);
  border-radius:var(--r-s);
  color:var(--c-primary);
  font-size:17px;
}
.burger:hover{background:rgba(15,61,46,.05)}
.drawer-mask{
  display:none;
  position:fixed;inset:0;
  background:rgba(11,18,16,.5);
  z-index:80;
}
.drawer-mask.is-open{display:block}
.drawer{
  position:fixed;
  top:0;left:0;bottom:0;
  width:84%;
  max-width:340px;
  background:var(--c-surface);
  z-index:90;
  transform:translateX(-102%);
  transition:transform .28s cubic-bezier(.22,.61,.36,1);
  display:flex;
  flex-direction:column;
  padding:22px 20px 20px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--c-line)}
.drawer-close{
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  background:transparent;
  border:1px solid var(--c-line);
  border-radius:var(--r-s);
  color:var(--c-text);
  font-size:16px;
}
.drawer-menu{display:flex;flex-direction:column;margin-top:12px;flex:1 1 auto}
.drawer-menu a{
  display:flex;align-items:center;gap:12px;
  min-height:48px;
  font-size:16px;
  color:#333B38;
  border-bottom:1px solid var(--c-line);
  text-decoration:none;
}
.drawer-menu a:hover{color:var(--c-primary);text-decoration:none}
.drawer-menu a.is-active{color:var(--c-primary);font-weight:600}
.drawer-foot{margin-top:22px}
body.no-scroll{overflow:hidden}

/* ============ 通用按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:12px;
  font-size:15px;
  font-weight:600;
  border:1.5px solid transparent;
  text-decoration:none;
  transition:background .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--primary{background:var(--c-cta);color:#fff;box-shadow:var(--sh-1)}
.btn--primary:hover{background:var(--c-cta-600);box-shadow:var(--sh-2)}
.btn--ghost{background:transparent;border-color:var(--c-primary);color:var(--c-primary)}
.btn--ghost:hover{background:rgba(15,61,46,.08)}
.btn--light{background:#fff;color:var(--c-primary)}
.btn--light:hover{background:#EFF3EF}
.btn--block{width:100%}
.btn--sm{height:42px;padding:0 18px;font-size:14px}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:600;color:var(--c-primary);
}
.link-arrow i{transition:transform .2s ease}
.link-arrow:hover i{transform:translateX(3px)}

/* ============ 页面骨架 ============ */
.site-main{margin-left:var(--nav-w);min-height:100vh}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--white{background:var(--c-surface)}
.section--tint{background:#EFF1EA}
.section-head{max-width:760px;margin-bottom:48px}
.section-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--c-primary-600);
  letter-spacing:.04em;
  margin-bottom:14px;
}
.section-kicker::before{content:"";width:22px;height:3px;border-radius:999px;background:var(--c-accent)}
h2{font-size:clamp(24px,3vw,36px);font-weight:700;letter-spacing:-.01em}
.section-head p{margin-top:14px;color:var(--c-muted);font-size:16px;max-width:42em}

/* ============ 分类页头部 ============ */
.page-hero{
  background:#EFF2EC;
  border-bottom:1px solid var(--c-line);
  padding:56px 0 64px;
  position:relative;
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;
  right:-120px;top:-120px;
  width:360px;height:360px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(198,242,78,.35),rgba(198,242,78,0) 68%);
  pointer-events:none;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--c-muted);
  margin-bottom:18px;
}
.breadcrumb a{color:var(--c-muted);text-decoration:none}
.breadcrumb a:hover{color:var(--c-primary);text-decoration:underline}
.breadcrumb span{color:#B4B8B2}
.page-hero h1{
  max-width:820px;
  font-size:clamp(30px,4vw,46px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.18;
  color:var(--c-ink);
}
.page-hero__lead{
  max-width:660px;
  margin-top:20px;
  font-size:17px;
  color:#44504B;
}
.page-hero__actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px}
.anchor-list{
  margin-top:38px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:14px;
  max-width:1000px;
}
.anchor-list a{
  display:flex;
  align-items:center;
  gap:10px;
  padding:14px 16px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-m);
  font-size:14px;
  color:var(--c-text);
  box-shadow:var(--sh-1);
  text-decoration:none;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.anchor-list a:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#CFD6C6;text-decoration:none}
.anchor-list a i{color:var(--c-primary);font-size:14px}
.anchor-list .idx{font-family:var(--font-mono);font-size:12px;color:var(--c-muted)}

/* ============ 编号要点 ============ */
.numbered-list{display:flex;flex-direction:column;gap:24px}
.numbered-item{
  display:grid;
  grid-template-columns:88px minmax(0,1fr);
  gap:26px;
  padding:28px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-l);
  box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease;
}
.numbered-item:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.num{
  width:64px;height:64px;
  display:flex;align-items:center;justify-content:center;
  background:var(--c-ink);
  color:var(--c-accent);
  border-radius:var(--r-m);
  font-family:var(--font-mono);
  font-size:22px;
  font-weight:700;
  letter-spacing:-.02em;
}
.numbered-body h3{font-size:20px;font-weight:600;margin-bottom:10px}
.numbered-body p{color:var(--c-muted);font-size:15.5px;max-width:60em}
.point-list{margin-top:16px;display:flex;flex-wrap:wrap;gap:10px}
.point-list li{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;
  background:rgba(15,61,46,.06);
  color:#26443A;
  border-radius:999px;
  font-size:13.5px;
}
.point-list li i{color:var(--c-primary);font-size:12px}

/* ============ 对照说明 ============ */
.compare-wrap{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:48px;
  align-items:start;
}
.compare-media{
  border-radius:var(--r-l);
  overflow:hidden;
  border:1px solid var(--c-line);
  box-shadow:var(--sh-2);
  aspect-ratio:16/9;
  background:var(--c-bg);
}
.compare-media img{width:100%;height:100%;object-fit:cover;transition:transform .32s ease}
.compare-media:hover img{transform:scale(1.03)}
.compare-caption{margin-top:12px;font-size:13px;color:var(--c-muted)}
.def-list{border-top:1px solid var(--c-line);margin-top:8px}
.def-row{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);
  gap:24px;
  padding:20px 0;
  border-bottom:1px solid var(--c-line);
}
.def-row dt{font-size:15.5px;font-weight:600;color:var(--c-ink);display:flex;gap:10px;align-items:flex-start}
.def-row dt i{color:var(--c-cta);font-size:13px;margin-top:6px}
.def-row dd{margin:0;font-size:15px;color:var(--c-muted)}
.list-heading{
  font-size:13px;font-weight:600;color:var(--c-primary-600);
  letter-spacing:.06em;margin-bottom:10px;
}

/* ============ 提示条 ============ */
.notice{
  display:flex;gap:16px;align-items:flex-start;
  padding:22px 24px;
  background:var(--c-ink);
  color:#DDE3DC;
  border-radius:var(--r-m);
  margin-top:36px;
}
.notice i{color:var(--c-accent);font-size:18px;margin-top:4px}
.notice p{font-size:14.5px;line-height:1.8;color:#C7CFC7}
.notice strong{color:#fff}

/* ============ FAQ ============ */
.faq{border-top:1px solid var(--c-line);max-width:900px}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;
  background:transparent;
  border:0;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--c-ink);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--c-primary)}
.faq-q .faq-icon{
  flex:0 0 auto;
  width:24px;height:24px;
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--c-primary);
  font-size:15px;
  transition:transform .18s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(180deg)}
.faq-a{
  display:none;
  padding:0 4px 20px;
  font-size:15px;
  line-height:1.9;
  color:var(--c-muted);
  max-width:46em;
}
.faq-item.is-open .faq-a{display:block;animation:fadeUp .24s cubic-bezier(.22,.61,.36,1)}
@keyframes fadeUp{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ============ CTA 带 ============ */
.cta-band{
  background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-ink) 100%);
  border-radius:var(--r-l);
  padding:56px 48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  color:#fff;
  box-shadow:var(--sh-3);
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);max-width:20em}
.cta-band p{margin-top:14px;color:#BFD0C6;font-size:15.5px;max-width:34em}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:14px;flex:0 0 auto}

/* ============ 互链模块 ============ */
.cross-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.cross-card{
  display:flex;flex-direction:column;gap:12px;
  padding:28px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-l);
  box-shadow:var(--sh-1);
  text-decoration:none;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.cross-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CFD6C6;text-decoration:none}
.cross-card .tag{
  align-self:flex-start;
  padding:5px 12px;
  background:rgba(15,61,46,.08);
  color:var(--c-primary);
  border-radius:999px;
  font-size:12.5px;
  font-weight:600;
}
.cross-card h3{font-size:19px;color:var(--c-ink)}
.cross-card p{font-size:14.5px;color:var(--c-muted)}
.cross-card .link-arrow{margin-top:6px}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--c-ink);
  color:#C9D1C9;
  padding:72px 0 32px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.brand-mark{
  display:inline-block;
  font-size:18px;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--c-primary);
  text-decoration:none;
}
.brand-mark--light{color:#fff}
.brand-mark:hover{text-decoration:none}
.footer-about{margin-top:14px;font-size:14px;color:#98A39B;max-width:30em;line-height:1.8}
.footer-col h4{
  font-size:14px;
  color:var(--c-accent);
  font-weight:600;
  margin-bottom:18px;
}
.footer-col a,.footer-col p{
  display:block;
  font-size:14px;
  color:#C9D1C9;
  margin-bottom:10px;
  text-decoration:none;
}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:26px;
  font-size:13px;
  color:#8C978F;
}
.footer-bottom a{color:#A9B4AC;font-family:var(--font-mono);font-size:12.5px}
.footer-bottom a:hover{color:#fff}

/* ============ 进场动画 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .24s cubic-bezier(.22,.61,.36,1),transform .24s cubic-bezier(.22,.61,.36,1)}
.reveal.is-visible{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  :root{--nav-w:236px}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .mobile-bar{display:flex}
  .site-main{margin-left:0}
  .section{padding:72px 0}
  .section--tight{padding:56px 0}
  .anchor-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .compare-wrap{grid-template-columns:minmax(0,1fr);gap:32px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:44px 32px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:767px){
  .container{padding-left:24px;padding-right:24px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .page-hero{padding:40px 0 48px}
  .page-hero__lead{font-size:16px}
  .anchor-list{grid-template-columns:minmax(0,1fr);gap:10px}
  .numbered-item{grid-template-columns:minmax(0,1fr);gap:16px;padding:22px}
  .num{width:52px;height:52px;font-size:18px}
  .def-row{grid-template-columns:minmax(0,1fr);gap:8px;padding:16px 0}
  .cross-grid{grid-template-columns:minmax(0,1fr)}
  .cta-band{padding:36px 24px;border-radius:var(--r-m)}
  .cta-band__actions{width:100%}
  .cta-band__actions .btn{flex:1 1 100%}
}
@media (max-width:519px){
  .container{padding-left:16px;padding-right:16px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .page-hero h1{font-size:28px}
  .point-list li{font-size:13px;padding:6px 12px}
}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  .numbered-item:hover,.cross-card:hover,.anchor-list a:hover{transform:none}
}