/* roulang page: index */
:root{
  --brand:#17544B;
  --brand-dark:#0E3A34;
  --brand-light:#2E7A6D;
  --accent:#C4622D;
  --gold:#E8B04B;
  --paper:#F7F4EE;
  --sand:#EFEAE1;
  --card:#FFFFFF;
  --ink:#1B2422;
  --ink2:#4B5654;
  --ink3:#7C8683;
  --line:#E0DAD0;
  --error:#B4442F;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --shadow-s:0 1px 2px rgba(27,36,34,.05), 0 8px 24px -18px rgba(27,36,34,.22);
  --shadow-h:0 2px 6px rgba(27,36,34,.07), 0 18px 34px -20px rgba(27,36,34,.30);
  --serif:"Noto Serif SC","Songti SC","SimSun",serif;
  --sans:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--brand);text-decoration:none;transition:color .16s ease}
a:hover{color:var(--brand-dark)}
p{margin:0 0 1.1em}
button,input,textarea,select{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:600;font-family:var(--serif);color:var(--ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:120;background:var(--brand);color:#fff;
  padding:10px 18px;border-radius:0 0 10px 0;font-size:15px;
}
.skip-link:focus{left:0;color:#fff}

/* 布局骨架 */
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.shell{margin-left:0}
@media (min-width:1024px){.shell{margin-left:236px}}

/* 左侧导航 */
.sidebar{
  position:fixed;top:0;left:0;width:236px;height:100vh;z-index:60;
  display:none;flex-direction:column;
  background:#fff;border-right:1px solid var(--line);
  padding:26px 18px 20px;
}
@media (min-width:1024px){.sidebar{display:flex}}
.sidebar-head{padding:0 6px 22px;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand:hover{color:var(--brand)}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:11px;
  background:var(--brand);color:#fff;font-family:var(--serif);font-size:19px;
  display:flex;align-items:center;justify-content:center;letter-spacing:0;
}
.brand-text{font-family:var(--serif);font-size:16px;font-weight:600;line-height:1.3}
.side-links{display:flex;flex-direction:column;gap:4px;margin-top:18px;flex:1 1 auto}
.side-link{
  position:relative;display:block;padding:11px 12px 11px 16px;border-radius:10px;
  font-size:15px;color:var(--ink2);font-weight:500;transition:background-color .16s,color .16s;
}
.side-link:hover{background:rgba(23,84,75,.06);color:var(--brand)}
.side-link.is-active{background:rgba(23,84,75,.08);color:var(--brand);font-weight:600}
.side-link.is-active::before{
  content:"";position:absolute;left:0;top:11px;bottom:11px;width:3px;
  border-radius:2px;background:var(--accent);
}
.sidebar-foot{border-top:1px solid var(--line);padding-top:16px}
.side-meta{font-size:13px;color:var(--ink3);line-height:1.7;margin:12px 0 0}
.side-meta a{color:var(--ink2);text-decoration:underline;text-decoration-color:var(--line)}
.side-meta a:hover{color:var(--brand)}

/* 移动端顶栏与抽屉 */
.mobile-bar{
  position:fixed;top:0;left:0;right:0;height:64px;z-index:70;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 16px;background:rgba(247,244,238,.96);
  border-bottom:1px solid var(--line);backdrop-filter:blur(6px);
}
@media (min-width:1024px){.mobile-bar{display:none}}
.menu-btn{
  width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:10px;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .16s,background-color .16s;
}
.menu-btn:hover{border-color:var(--brand-light);background:rgba(23,84,75,.05)}
.menu-btn svg{width:20px;height:20px;stroke:var(--brand);stroke-width:2;fill:none}
.drawer{
  position:fixed;inset:0;z-index:80;background:var(--paper);
  transform:translateY(-101%);transition:transform .22s ease;
  display:flex;flex-direction:column;padding:16px 18px 24px;overflow-y:auto;
}
.drawer.is-open{transform:translateY(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-links{display:flex;flex-direction:column;margin-top:10px}
.drawer-links a{
  display:flex;align-items:center;min-height:48px;font-size:16px;
  color:var(--ink);border-bottom:1px solid var(--line);
}
.drawer-links a.is-active{color:var(--brand);font-weight:600}
.drawer-cta{margin-top:auto;padding-top:20px}
.main-offset{margin-top:64px}
@media (min-width:1024px){.main-offset{margin-top:0}}

/* 通用板块 */
.section{padding:56px 0}
@media (min-width:768px){.section{padding:64px 0}}
@media (min-width:1024px){.section{padding:88px 0}}
.section-sand{background:var(--sand)}
.section-line{border-top:1px solid var(--line)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:16px;
  margin-bottom:28px;flex-wrap:wrap;
}
.section-lede{font-size:18px;line-height:1.8;color:var(--ink2);max-width:640px;margin:12px 0 0}
.link-more{
  font-size:14px;font-weight:600;color:var(--brand);white-space:nowrap;
  border-bottom:1px solid rgba(23,84,75,.3);padding-bottom:2px;
}
.link-more:hover{border-bottom-color:var(--brand)}
h1{font-size:30px;line-height:1.3}
@media (min-width:1024px){h1{font-size:42px;line-height:1.25}}
h2{font-size:24px;line-height:1.35}
@media (min-width:1024px){h2{font-size:30px}}
h3{font-size:19px;line-height:1.5}
@media (min-width:1024px){h3{font-size:21px}}
.h2-rule{display:block;width:40px;height:3px;background:var(--accent);border-radius:2px;margin-top:14px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.2px;
  border:1.5px solid transparent;cursor:pointer;text-align:center;
  transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease,color .16s ease,border-color .16s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-s)}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-h)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-s)}
.btn-ghost{background:transparent;border-color:var(--brand);color:var(--brand)}
.btn-ghost:hover{background:rgba(23,84,75,.08);color:var(--brand-dark)}
.btn-light{background:var(--paper);color:var(--brand-dark)}
.btn-light:hover{background:#fff;color:var(--brand-dark);transform:translateY(-1px);box-shadow:0 14px 28px -22px rgba(0,0,0,.6)}
.btn-block{width:100%}
.btn:disabled{opacity:.45;pointer-events:none}

/* 首屏 */
.hero{padding:40px 0 8px}
@media (min-width:1024px){.hero{padding:64px 0 24px}}
.hero-grid{display:grid;gap:32px;align-items:center}
@media (min-width:1024px){.hero-grid{grid-template-columns:6fr 6fr;gap:48px}}
.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:1.2px;color:var(--brand);
  background:rgba(23,84,75,.08);border-radius:999px;padding:5px 12px;margin-bottom:18px;
}
.rule-accent{display:block;width:40px;height:3px;background:var(--accent);border-radius:2px;margin:18px 0 18px}
.lede{font-size:18px;line-height:1.8;color:var(--ink2);max-width:520px;margin-bottom:26px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.trust{display:flex;flex-wrap:wrap;gap:0 14px;font-size:14px;color:var(--ink3)}
.trust li{position:relative;padding-left:14px}
.trust li:first-child{padding-left:0}
.trust li:not(:first-child)::before{
  content:"";position:absolute;left:0;top:50%;width:1px;height:14px;
  transform:translateY(-50%);background:var(--line);
}
.hero-media{margin:0}
.hero-media img{
  width:100%;height:auto;aspect-ratio:5/4;object-fit:cover;
  border-radius:16px;border:1px solid rgba(23,84,75,.14);
  box-shadow:var(--shadow-h);
}

/* 步骤 */
.steps{margin-top:8px;max-width:820px}
.step{position:relative;padding-left:76px;padding-bottom:38px}
.step:last-child{padding-bottom:0}
.step:not(:last-child)::before{
  content:"";position:absolute;left:19px;top:46px;bottom:6px;width:2px;background:var(--line);
}
.step-num{
  position:absolute;left:0;top:0;width:40px;height:40px;border-radius:50%;
  border:1px solid var(--accent);background:#fff;color:var(--brand);
  font-family:var(--serif);font-size:19px;display:flex;align-items:center;justify-content:center;
}
.step h3{margin-bottom:6px}
.step p{margin-bottom:8px;color:var(--ink2)}
.step-hint{
  display:inline-block;font-size:14px;color:var(--brand);
  background:rgba(23,84,75,.07);border-radius:8px;padding:6px 12px;margin:0;
}

/* 案例与指标 */
.case-grid{display:grid;gap:24px}
@media (min-width:1024px){.case-grid{grid-template-columns:7fr 5fr;gap:28px;align-items:start}}
.case-main{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--shadow-s);
}
.case-main img{
  width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-img);margin-bottom:18px;
}
.case-main p{color:var(--ink2);margin-bottom:6px}
.case-side{display:flex;flex-direction:column;gap:0}
.kpi{padding:20px 0;border-top:1px solid var(--line)}
.kpi:first-child{border-top:0;padding-top:0}
.kpi-num{
  display:block;font-family:var(--serif);font-size:34px;line-height:1.2;
  color:var(--brand);letter-spacing:.5px;
}
@media (min-width:1024px){.kpi-num{font-size:40px}}
.kpi p{margin:6px 0 0;font-size:14px;color:var(--ink2)}
.kpi-note{font-size:13px;color:var(--ink3);margin-top:14px}

/* FAQ */
.faq-grid{display:grid;gap:0}
@media (min-width:768px){.faq-grid{grid-template-columns:1fr 1fr;column-gap:44px}}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:20px 36px 20px 0;font-size:17px;font-weight:600;line-height:1.5;
  transition:color .16s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";position:absolute;right:8px;top:26px;width:9px;height:9px;
  border-right:1.5px solid var(--brand-light);border-bottom:1.5px solid var(--brand-light);
  transform:rotate(45deg);transition:transform .18s ease;
}
.faq-item[open] summary::after{transform:rotate(-135deg)}
.faq-item summary:hover{color:var(--brand)}
.faq-body{padding:0 12px 20px 0;color:var(--ink2);font-size:15.5px;line-height:1.85}
.faq-body p{margin:0}

/* 资讯卡片 */
.news-grid{display:grid;gap:16px;grid-template-columns:1fr}
@media (min-width:640px){.news-grid{grid-template-columns:1fr 1fr;gap:20px}}
@media (min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.news-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px;box-shadow:var(--shadow-s);
  transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-h);border-color:var(--brand-light)}
.news-cover img{
  width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;border-radius:10px;
  transition:opacity .16s ease;
}
.news-card:hover .news-cover img{opacity:.94}
.badge{
  display:inline-block;align-self:flex-start;margin:14px 0 10px;
  background:rgba(23,84,75,.08);color:var(--brand);
  font-size:13px;line-height:1.6;padding:3px 10px;border-radius:999px;
}
.news-title{font-family:var(--sans);font-size:18px;line-height:1.5;margin-bottom:8px}
.news-title a{
  color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-title a:hover{color:var(--brand)}
.news-excerpt{
  font-size:14px;line-height:1.75;color:var(--ink2);margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink3);
}
.read-more{font-size:14px;font-weight:600;color:var(--brand)}
.read-more:hover{text-decoration:underline}
.empty-state{
  background:#fff;border:1px dashed var(--line);border-radius:var(--r-card);
  padding:48px 24px;text-align:center;
}
.empty-figure{display:flex;justify-content:center;margin-bottom:16px}
.empty-figure svg{width:64px;height:64px;stroke:var(--brand-light);stroke-width:1.5;fill:none;opacity:.8}
.empty-state p{color:var(--ink2);margin-bottom:18px}

/* 栏目入口 */
.entry-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:768px){.entry-grid{grid-template-columns:1fr 1fr;gap:24px}}
.entry-card{
  display:flex;gap:20px;align-items:flex-start;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-card);padding:22px;
  box-shadow:var(--shadow-s);transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease;
}
.entry-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-h);border-color:var(--brand-light)}
.entry-card img{
  width:96px;height:96px;flex:0 0 96px;object-fit:cover;border-radius:var(--r-img);
  border:1px solid rgba(23,84,75,.12);
}
.entry-card h3{margin-bottom:6px}
.entry-card p{font-size:14.5px;color:var(--ink2);margin-bottom:10px}
.entry-link{font-size:14px;font-weight:600;color:var(--brand)}
@media (max-width:520px){.entry-card{flex-direction:column}.entry-card img{width:100%;height:150px;flex:none}}

/* 开通区 */
.apply{background:var(--brand-dark);color:#EFEAE1}
.apply h2{color:#fff}
.apply .section-lede{color:rgba(239,234,225,.82)}
.apply-grid{display:grid;gap:36px;align-items:start}
@media (min-width:1024px){.apply-grid{grid-template-columns:5fr 6fr;gap:64px}}
.apply-points{margin-top:22px;display:flex;flex-direction:column;gap:12px}
.apply-points li{position:relative;padding-left:22px;font-size:15.5px;color:rgba(239,234,225,.9)}
.apply-points li::before{
  content:"";position:absolute;left:0;top:12px;width:8px;height:8px;border-radius:50%;
  background:var(--accent);
}
.form-card{background:#fff;border-radius:var(--r-card);padding:28px;box-shadow:0 24px 48px -32px rgba(0,0,0,.55)}
.form-card h3{font-family:var(--sans);font-size:17px;margin-bottom:18px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:var(--ink2);margin-bottom:6px;letter-spacing:.2px}
.field input,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;color:var(--ink);font-size:15px;min-height:48px;padding:0 14px;
  transition:border-color .16s ease,box-shadow .16s ease;
}
.field textarea{min-height:110px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:#A9B1AE}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(23,84,75,.08);
}
.field .hint{display:block;font-size:12.5px;color:var(--ink3);margin-top:6px}
.form-actions{display:flex;flex-direction:column;gap:12px;margin-top:6px}
@media (min-width:640px){.form-actions{align-items:flex-end}}
.privacy{font-size:13px;color:var(--ink3);margin:14px 0 0;line-height:1.7}

/* 页脚 */
.footer{background:var(--sand);border-top:1px solid var(--line);padding:56px 0 0}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.footer-brand .brand-text{font-size:17px}
.footer-desc{font-size:14px;color:var(--ink2);margin-top:14px;max-width:300px}
.footer-col h4{font-family:var(--sans);font-size:15px;margin-bottom:14px;color:var(--ink)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col span{font-size:14px;color:var(--ink2)}
.footer-col a:hover{color:var(--brand);text-decoration:underline}
.footer-bottom{
  margin-top:44px;padding:20px 0;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
  font-size:13px;color:var(--ink3);
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
    --spruce:#17544B;
    --spruce-deep:#0E3A34;
    --spruce-light:#2E7A6D;
    --clay:#C4622D;
    --sand:#E8B04B;
    --paper:#F7F4EE;
    --sand-bg:#EFEAE1;
    --card:#FFFFFF;
    --ink:#1B2422;
    --ink-2:#4B5654;
    --ink-3:#7C8683;
    --line:#E0DAD0;
    --error:#B4442F;
    --radius-card:14px;
    --radius-img:12px;
    --radius-btn:10px;
    --shadow-1:0 1px 2px rgba(27,36,34,.06), 0 10px 26px -18px rgba(27,36,34,.28);
    --shadow-2:0 2px 6px rgba(27,36,34,.10), 0 18px 36px -20px rgba(27,36,34,.34);
  }

  *,*::before,*::after{ box-sizing:border-box; }
  html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{ max-width:100%; display:block; }
  a{ color:inherit; text-decoration:none; }
  button{ font:inherit; cursor:pointer; }
  h1,h2,h3,h4{ font-family:"Noto Serif SC","Songti SC","Source Han Serif SC",serif; font-weight:600; color:var(--ink); }
  :focus-visible{ outline:2px solid var(--clay); outline-offset:2px; border-radius:4px; }

  .skip{
    position:absolute; left:-9999px; top:0; z-index:200;
    background:var(--spruce); color:#fff; padding:10px 18px; border-radius:0 0 10px 0; font-size:14px;
  }
  .skip:focus{ left:0; }

  .container{ width:100%; max-width:1200px; margin:0 auto; padding:0 20px; }
  @media (min-width:768px){ .container{ padding:0 28px; } }

  /* ---------- 品牌 ---------- */
  .brand{ display:inline-flex; align-items:center; gap:10px; }
  .brand-mark{
    width:34px; height:34px; border-radius:10px; background:var(--spruce); color:#fff;
    display:grid; place-items:center; font-family:"Noto Serif SC",serif; font-size:17px; line-height:1;
    box-shadow:inset 0 0 0 1px rgba(255,255,255,.18);
  }
  .brand-text{ font-family:"Noto Serif SC",serif; font-size:17px; font-weight:600; letter-spacing:.2px; }

  /* ---------- 顶部移动导航 ---------- */
  .topbar{
    display:flex; align-items:center; justify-content:space-between;
    height:64px; padding:0 18px;
    background:rgba(247,244,238,.96);
    border-bottom:1px solid var(--line);
    position:sticky; top:0; z-index:60;
  }
  .menu-btn{
    width:44px; height:44px; border:1px solid var(--line); background:#fff; border-radius:10px;
    display:grid; place-content:center; gap:5px; transition:border-color .18s ease, transform .18s ease;
  }
  .menu-btn:hover{ border-color:var(--spruce-light); }
  .menu-btn span{ display:block; width:18px; height:2px; background:var(--ink); border-radius:2px; transition:transform .18s ease, opacity .18s ease; }
  .menu-btn[aria-expanded="true"] span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
  .menu-btn[aria-expanded="true"] span:nth-child(2){ opacity:0; }
  .menu-btn[aria-expanded="true"] span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

  .drawer{
    position:fixed; inset:0; z-index:70; background:var(--paper);
    padding:76px 20px 24px; display:none; overflow-y:auto;
  }
  .drawer.is-open{ display:block; }
  .drawer .side-links{ margin-bottom:24px; }
  @media (min-width:1024px){ .topbar, .drawer{ display:none !important; } }

  /* ---------- 布局骨架 ---------- */
  .shell{ display:block; }
  @media (min-width:1024px){
    .shell{
      display:grid; grid-template-columns:236px minmax(0,1fr);
      gap:40px; max-width:1440px; margin:0 auto; padding:0 32px;
    }
  }

  /* ---------- 左侧竖向导航 ---------- */
  .sidebar{ display:none; }
  @media (min-width:1024px){
    .sidebar{ display:block; }
    .sidebar-inner{
      position:sticky; top:0; height:100vh;
      display:flex; flex-direction:column; gap:28px;
      padding:34px 0 28px;
    }
  }
  .side-links{ display:flex; flex-direction:column; gap:6px; }
  .side-link{
    position:relative; display:block; padding:11px 14px 11px 16px;
    border-radius:10px; color:var(--ink-2); font-size:15px; font-weight:500;
    transition:background .18s ease, color .18s ease;
  }
  .side-link:hover{ background:rgba(23,84,75,.06); color:var(--spruce); }
  .side-link.is-active{ background:rgba(23,84,75,.08); color:var(--spruce); font-weight:600; }
  .side-link.is-active::before{
    content:""; position:absolute; left:0; top:12px; bottom:12px; width:3px;
    border-radius:2px; background:var(--clay);
  }
  .sidebar-foot{ margin-top:auto; display:flex; flex-direction:column; gap:14px; }
  .sidebar-note{ margin:0; font-size:12.5px; line-height:1.8; color:var(--ink-3); }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex; align-items:center; justify-content:center; gap:8px;
    min-height:46px; padding:0 22px; border-radius:var(--radius-btn);
    font-size:15px; font-weight:600; border:1.5px solid transparent;
    transition:background .18s ease, color .18s ease, transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  }
  .btn-primary{ background:var(--spruce); color:#fff; box-shadow:var(--shadow-1); }
  .btn-primary:hover{ background:var(--spruce-deep); transform:translateY(-1px); }
  .btn-primary:active{ transform:translateY(0); box-shadow:none; }
  .btn-ghost{ background:transparent; border-color:var(--spruce); color:var(--spruce); }
  .btn-ghost:hover{ background:rgba(23,84,75,.08); }
  .btn-block{ width:100%; }

  /* ---------- 主内容 ---------- */
  .main{ padding:24px 16px 0; }
  @media (min-width:768px){ .main{ padding:32px 24px 0; } }
  @media (min-width:1024px){ .main{ padding:48px 0 0; } }
  .content{ max-width:1180px; margin:0 auto; }

  /* ---------- 面包屑 ---------- */
  .crumbs{
    display:flex; flex-wrap:wrap; align-items:center; gap:8px;
    font-size:13px; color:var(--ink-3); margin-bottom:12px;
  }
  .crumbs a{ transition:color .18s ease; }
  .crumbs a:hover{ color:var(--spruce); text-decoration:underline; text-underline-offset:3px; }
  .crumbs .sep{ color:var(--line); }
  .crumbs .cur{
    color:var(--spruce); font-weight:600;
    max-width:260px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
  }

  /* ---------- 文章卡 ---------- */
  .article{
    background:var(--card); border:1px solid var(--line);
    border-radius:var(--radius-card); box-shadow:var(--shadow-1);
    padding:28px 20px;
  }
  @media (min-width:768px){ .article{ padding:44px 40px; } }
  @media (min-width:1024px){ .article{ padding:52px 48px; } }

  .article-body{ max-width:740px; margin:0 auto; }
  .article-title{
    font-size:29px; line-height:1.32; margin:0 0 14px; letter-spacing:.2px;
  }
  @media (min-width:1024px){ .article-title{ font-size:40px; line-height:1.28; } }

  .meta-row{
    display:flex; flex-wrap:wrap; align-items:center; gap:10px 18px;
    font-size:13.5px; color:var(--ink-3); margin-bottom:26px;
  }
  .chip{
    display:inline-flex; align-items:center; height:24px; padding:0 11px;
    border-radius:999px; background:rgba(23,84,75,.08); color:var(--spruce);
    font-size:12.5px; font-weight:600; letter-spacing:.2px;
  }
  .meta-dot{ width:3px; height:3px; border-radius:50%; background:var(--line); }

  .cover{ margin:0 0 32px; }
  .cover img{
    width:100%; height:auto; aspect-ratio:16/9; object-fit:cover;
    border-radius:var(--radius-img); border:1px solid var(--line);
  }
  .cover figcaption{ margin-top:10px; font-size:13px; color:var(--ink-3); }

  /* ---------- 正文排版 ---------- */
  .prose-cn{ font-size:17px; line-height:1.9; color:var(--ink); }
  .prose-cn > *:first-child{ margin-top:0; }
  .prose-cn p{ margin:0 0 1.15em; }
  .prose-cn h2{
    position:relative; font-size:24px; line-height:1.4;
    margin:2em 0 .7em; padding-left:14px;
  }
  .prose-cn h2::before{
    content:""; position:absolute; left:0; top:.2em; bottom:.2em; width:4px;
    border-radius:2px; background:var(--spruce);
  }
  .prose-cn h3{ font-size:19px; line-height:1.5; margin:1.7em 0 .6em; }
  .prose-cn h4{ font-size:17px; margin:1.4em 0 .5em; }
  .prose-cn ul,.prose-cn ol{ margin:0 0 1.15em; padding-left:1.35em; }
  .prose-cn li{ margin-bottom:.5em; }
  .prose-cn li::marker{ color:var(--spruce-light); }
  .prose-cn strong{ font-weight:600; }
  .prose-cn a{ color:var(--spruce); text-decoration:underline; text-underline-offset:3px; }
  .prose-cn a:hover{ color:var(--spruce-deep); }
  .prose-cn blockquote{
    margin:1.5em 0; padding:14px 20px; border-left:3px solid var(--clay);
    background:var(--sand-bg); color:var(--ink-2); border-radius:0 10px 10px 0;
  }
  .prose-cn blockquote p:last-child{ margin-bottom:0; }
  .prose-cn img{ border-radius:var(--radius-img); margin:1.5em 0; border:1px solid var(--line); }
  .prose-cn code{
    background:var(--sand-bg); padding:2px 7px; border-radius:6px;
    font-size:14.5px; font-family:Inter,"SFMono-Regular",Consolas,monospace;
  }
  .prose-cn pre{
    background:#132C28; color:#E9F2EF; padding:18px; border-radius:12px;
    overflow-x:auto; font-size:14px; line-height:1.7; margin:1.5em 0;
  }
  .prose-cn pre code{ background:transparent; color:inherit; padding:0; }
  .prose-cn table{
    width:100%; border-collapse:collapse; margin:1.5em 0; font-size:15px;
    display:block; overflow-x:auto; white-space:nowrap;
  }
  .prose-cn th,.prose-cn td{ border:1px solid var(--line); padding:11px 14px; text-align:left; }
  .prose-cn thead th{ background:var(--sand-bg); font-weight:600; }
  .prose-cn tbody tr:nth-child(even){ background:#FBFAF7; }
  .prose-cn tbody td:first-child{ font-weight:600; }
  .prose-cn hr{ border:0; border-top:1px solid var(--line); margin:2em 0; }

  .empty-note{ color:var(--ink-2); }

  /* ---------- 文末 ---------- */
  .article-foot{
    margin-top:38px; padding-top:22px; border-top:1px solid var(--line);
    display:flex; flex-wrap:wrap; gap:16px; align-items:center; justify-content:space-between;
  }
  .tags{ display:flex; flex-wrap:wrap; gap:8px; }
  .tag{
    display:inline-flex; align-items:center; height:28px; padding:0 12px;
    border-radius:999px; border:1px solid var(--line);
    font-size:13px; color:var(--ink-2); transition:border-color .18s ease, color .18s ease;
  }
  .tag:hover{ border-color:var(--spruce-light); color:var(--spruce); }
  .back-link{ font-size:14px; font-weight:600; color:var(--spruce); }
  .back-link:hover{ text-decoration:underline; text-underline-offset:4px; }

  /* ---------- 相关推荐 ---------- */
  .related{ margin-top:52px; }
  .section-head{
    display:flex; flex-wrap:wrap; align-items:baseline; justify-content:space-between;
    gap:12px; margin-bottom:22px;
  }
  .section-title{ font-size:23px; line-height:1.4; margin:0; }
  .section-more{ font-size:14px; font-weight:600; color:var(--spruce); }
  .section-more:hover{ text-decoration:underline; text-underline-offset:4px; }

  .card-grid{ display:grid; gap:24px; grid-template-columns:1fr; }
  @media (min-width:768px){ .card-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); } }
  @media (min-width:1024px){ .card-grid{ grid-template-columns:repeat(3,minmax(0,1fr)); } }

  .card{
    display:flex; flex-direction:column; gap:12px;
    background:var(--card); border:1px solid var(--line); border-radius:var(--radius-card);
    padding:22px; box-shadow:var(--shadow-1);
    transition:border-color .18s ease, transform .18s ease, box-shadow .18s ease;
  }
  .card:hover{ border-color:var(--spruce-light); transform:translateY(-2px); box-shadow:var(--shadow-2); }
  .card-title{ font-size:18px; line-height:1.5; margin:0; }
  .card-text{ font-size:14px; line-height:1.8; color:var(--ink-2); margin:0; }
  .card-foot{
    margin-top:auto; padding-top:12px; border-top:1px solid var(--line);
    display:flex; align-items:center; justify-content:space-between;
    font-size:13px; color:var(--ink-3);
  }

  /* ---------- 页脚 ---------- */
  .footer{
    background:var(--sand-bg); border-top:1px solid var(--line);
    margin-top:76px; padding:56px 0 24px;
  }
  .footer-grid{ display:grid; gap:32px; grid-template-columns:1fr; }
  @media (min-width:640px){ .footer-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); } }
  @media (min-width:1024px){ .footer-grid{ grid-template-columns:1.5fr 1fr 1fr 1fr; gap:40px; } }
  .footer-brand .brand-text{ font-size:17px; }
  .footer-desc{ font-size:14px; line-height:1.85; color:var(--ink-2); margin:14px 0 0; max-width:36ch; }
  .footer-col h4{ font-size:15px; margin:0 0 14px; }
  .footer-col ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:10px; }
  .footer-col li{ font-size:14px; color:var(--ink-2); }
  .footer-col a{ transition:color .18s ease; }
  .footer-col a:hover{ color:var(--spruce); text-decoration:underline; text-underline-offset:3px; }
  .footer-bottom{
    margin-top:40px; padding-top:18px; border-top:1px solid var(--line);
    display:flex; flex-wrap:wrap; gap:10px; justify-content:space-between;
    font-size:13px; color:var(--ink-3);
  }

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

/* roulang page: category1 */
:root{
  --c-primary:#17544B;
  --c-primary-deep:#0E3A34;
  --c-primary-light:#2E7A6D;
  --c-accent:#C4622D;
  --c-gold:#E8B04B;
  --bg:#F7F4EE;
  --bg-sand:#EFEAE1;
  --card:#FFFFFF;
  --text:#1B2422;
  --text-2:#4B5654;
  --text-3:#7C8683;
  --line:#E0DAD0;
  --danger:#B4442F;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(27,36,34,.05), 0 8px 24px -18px rgba(14,58,52,.28);
  --sh-2:0 2px 4px rgba(27,36,34,.06), 0 16px 34px -20px rgba(14,58,52,.34);
  --font-serif:"Noto Serif SC","Songti SC",Georgia,serif;
  --font-sans:"PingFang SC","HarmonyOS Sans","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --sidebar-w:236px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-sans);font-size:16px;line-height:1.85;}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure,dl,dd,dt{margin:0;}
ul,ol{padding:0;list-style:none;}
summary{list-style:none;}
summary::-webkit-details-marker{display:none;}
::selection{background:rgba(23,84,75,.16);}

.skip-link{position:absolute;left:12px;top:-60px;z-index:99;background:var(--c-primary);color:#fff;padding:10px 18px;border-radius:var(--r-btn);transition:top .18s ease;}
.skip-link:focus{top:12px;}

a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--c-accent);
  outline-offset:2px;
  border-radius:6px;
}

/* 布局骨架 */
.app{display:grid;grid-template-columns:var(--sidebar-w) minmax(0,1fr);min-height:100vh;}
.main-col{min-width:0;display:flex;flex-direction:column;}
.wrap{width:100%;max-width:1180px;padding:0 40px;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 28px;}

/* 左侧导航 */
.sidebar{
  position:sticky;top:0;
  height:100vh;
  display:flex;flex-direction:column;gap:22px;
  padding:26px 18px 22px;
  background:#fff;
  border-right:1px solid var(--line);
  overflow-y:auto;
  z-index:50;
}
.brand{display:flex;align-items:center;gap:10px;}
.brand-mark{
  width:38px;height:38px;flex:0 0 auto;border-radius:11px;
  background:var(--c-primary);color:#fff;
  display:grid;place-items:center;
  font-family:var(--font-serif);font-size:19px;font-weight:600;
  box-shadow:0 6px 14px -8px rgba(14,58,52,.75);
}
.brand-text{
  font-family:var(--font-serif);font-size:17px;font-weight:600;
  letter-spacing:.02em;color:var(--c-primary-deep);line-height:1.35;
}
.side-links{display:flex;flex-direction:column;gap:4px;}
.side-link{
  position:relative;display:block;
  padding:11px 12px 11px 16px;
  border-radius:10px;
  font-size:15px;color:var(--text-2);
  transition:background .18s ease,color .18s ease;
}
.side-link:hover{background:rgba(23,84,75,.06);color:var(--c-primary);}
.side-link.is-active{background:rgba(23,84,75,.08);color:var(--c-primary);font-weight:600;}
.side-link.is-active::before{
  content:"";position:absolute;left:0;top:11px;bottom:11px;width:3px;
  border-radius:2px;background:var(--c-accent);
}
.side-foot{margin-top:auto;display:flex;flex-direction:column;gap:12px;}
.side-note{font-size:13px;line-height:1.7;color:var(--text-3);}
.side-meta{font-size:13px;color:var(--text-3);border-top:1px solid var(--line);padding-top:14px;}
.side-meta a:hover{color:var(--c-primary);text-decoration:underline;}

/* 移动端顶栏与抽屉 */
.topbar{
  display:none;align-items:center;justify-content:space-between;
  height:64px;padding:0 18px;
  background:rgba(247,244,238,.94);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:60;
}
.nav-toggle{
  display:inline-flex;align-items:center;gap:8px;
  min-height:44px;padding:0 14px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-btn);
  font-size:14px;color:var(--c-primary-deep);cursor:pointer;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.nav-toggle:hover{border-color:var(--c-primary-light);box-shadow:var(--sh-1);}
.nav-toggle svg{width:18px;height:18px;stroke:var(--c-primary);}
.scrim{display:none;position:fixed;inset:0;background:rgba(14,58,52,.36);z-index:45;}
.scrim.is-open{display:block;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;
  border-radius:var(--r-btn);border:1.5px solid transparent;
  font-size:16px;font-weight:600;line-height:1;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 10px 22px -16px rgba(14,58,52,.9);}
.btn-primary:hover{background:var(--c-primary-deep);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1);}
.btn-ghost{background:transparent;color:var(--c-primary);border-color:var(--c-primary);}
.btn-ghost:hover{background:rgba(23,84,75,.08);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;}

/* 面包屑 */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);
}
.breadcrumb a{transition:color .18s ease;}
.breadcrumb a:hover{color:var(--c-primary);text-decoration:underline;}
.breadcrumb .sep{color:var(--line);}
.breadcrumb .current{color:var(--c-primary);font-weight:600;}

/* 页头 */
.page-head{padding:30px 0 46px;}
.page-h1{
  margin-top:12px;
  font-family:var(--font-serif);
  font-size:42px;line-height:1.25;font-weight:600;letter-spacing:.01em;
}
.lede{
  margin-top:16px;max-width:34em;
  font-size:18px;line-height:1.8;color:var(--text-2);
}
.head-actions{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px;}
.trust-line{
  margin-top:22px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13px;color:var(--text-3);
}
.trust-line .dot{display:inline-block;width:1px;height:12px;background:var(--line);}
.head-grid{display:grid;gap:40px;align-items:center;margin-top:22px;}
@media (min-width:1024px){.head-grid{grid-template-columns:minmax(0,1.3fr) minmax(0,.9fr);}}
.head-media img{
  width:100%;aspect-ratio:5/4;object-fit:cover;
  border-radius:16px;border:1px solid rgba(23,84,75,.1);
  box-shadow:var(--sh-1);
}

/* 板块 */
.sec{padding:64px 0;border-top:1px solid var(--line);}
.sec-head{margin-bottom:8px;}
.title-rule{width:40px;height:3px;border-radius:2px;background:var(--c-accent);margin-bottom:16px;}
.sec-title{
  font-family:var(--font-serif);
  font-size:30px;line-height:1.35;font-weight:600;
}
.sec-intro{margin-top:14px;max-width:42em;font-size:16px;color:var(--text-2);}
.sec-body{margin-top:26px;}
.sec-body p{font-size:16px;line-height:1.9;color:var(--text-2);max-width:42em;}

/* 交替图文 */
.split{display:grid;gap:40px;align-items:center;margin-top:34px;}
@media (min-width:900px){
  .split{grid-template-columns:minmax(0,1fr) minmax(0,1fr);}
  .split-rev .split-media{order:-1;}
}
@media (max-width:899px){.split{gap:24px;}}
.split-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-img);
  border:1px solid rgba(23,84,75,.1);
  box-shadow:var(--sh-1);
}
.split-text p + p{margin-top:18px;}
.split-text p{font-size:16px;line-height:1.9;color:var(--text-2);}

/* 要点清单 */
.check-list{margin-top:22px;display:flex;flex-direction:column;gap:14px;}
.check-list li{
  position:relative;padding-left:32px;
  font-size:15.5px;line-height:1.8;color:var(--text-2);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:8px;
  width:16px;height:16px;border-radius:5px;
  border:1.5px solid var(--c-primary-light);
}
.check-list li::after{
  content:"";position:absolute;left:5px;top:13px;
  width:6px;height:6px;border-radius:2px;background:var(--c-accent);
}
.check-list strong{color:var(--text);font-weight:600;}

/* 步骤 */
.steps{margin-top:30px;}
.step{
  position:relative;
  display:grid;grid-template-columns:48px minmax(0,1fr);gap:18px;
  padding:16px 0 24px;
}
.step::before{
  content:"";position:absolute;left:23px;top:56px;bottom:4px;width:1.5px;
  background:var(--line);
}
.step:last-child::before{display:none;}
.step-num{
  width:48px;height:48px;border-radius:50%;
  display:grid;place-items:center;
  background:#fff;border:1.5px solid var(--c-accent);
  color:var(--c-primary);font-family:var(--font-serif);font-size:18px;font-weight:600;
}
.step-body h3{font-size:21px;line-height:1.5;font-weight:600;}
.step-body p{margin-top:8px;font-size:15.5px;line-height:1.85;color:var(--text-2);max-width:40em;}
.step-note{
  display:inline-block;margin-top:10px;
  padding:4px 12px;border-radius:999px;
  font-size:13px;color:var(--c-primary);background:rgba(23,84,75,.07);
}

/* 对照两列 */
.compare{margin-top:32px;display:grid;gap:24px;}
@media (min-width:768px){.compare{grid-template-columns:repeat(2,minmax(0,1fr));}}
.compare-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px;
  box-shadow:var(--sh-1);
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.compare-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--c-primary-light);}
.compare-card h3{font-size:19px;font-weight:600;line-height:1.5;}
.compare-badge{
  display:inline-block;margin-bottom:14px;
  padding:3px 12px;border-radius:999px;
  font-size:13px;color:var(--c-primary);background:rgba(23,84,75,.08);
}
.compare-row{
  display:flex;justify-content:space-between;gap:16px;
  padding:13px 0;border-top:1px dashed var(--line);
  font-size:15px;
}
.compare-row dt{color:var(--text-3);font-size:14px;flex:0 0 auto;}
.compare-row dd{color:var(--text);font-weight:500;text-align:right;}
.compare-row:first-of-type{border-top:0;}
.compare-note{margin-top:22px;font-size:14px;color:var(--text-3);max-width:44em;}

/* FAQ */
.faq{margin-top:28px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:60px;padding:18px 0;
  font-size:17px;font-weight:600;color:var(--text);cursor:pointer;
  transition:color .18s ease;
}
.faq-item summary:hover{color:var(--c-primary);}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 auto;transition:transform .2s ease;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--c-primary-light);border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}
.faq-icon::before{left:0;right:0;top:8px;height:2px;}
.faq-icon::after{top:0;bottom:0;left:8px;width:2px;}
.faq-item[open] .faq-icon{transform:rotate(90deg);}
.faq-item[open] .faq-icon::after{opacity:0;}
.faq-body{padding:2px 0 24px;max-width:46em;font-size:15.5px;line-height:1.9;color:var(--text-2);}

/* 底部 CTA */
.cta-band{
  margin-top:26px;
  background:var(--bg-sand);
  border:1px solid var(--line);
  border-radius:16px;
  padding:38px;
}
.cta-band h2{font-family:var(--font-serif);font-size:26px;line-height:1.4;font-weight:600;}
.cta-band p{margin-top:12px;max-width:42em;font-size:15.5px;line-height:1.85;color:var(--text-2);}
.cta-actions{margin-top:24px;display:flex;flex-wrap:wrap;gap:12px;}
.cta-note{margin-top:16px;font-size:13px;color:var(--text-3);}

/* 页脚 */
.footer{
  margin-top:72px;
  padding:56px 0 26px;
  background:var(--bg-sand);
  border-top:1px solid var(--line);
}
.footer-grid{display:grid;gap:32px;}
@media (min-width:960px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;}}
@media (min-width:560px) and (max-width:959px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}}
.footer-desc{margin-top:14px;max-width:30em;font-size:14px;line-height:1.85;color:var(--text-2);}
.footer-col h4{font-size:15px;font-weight:600;color:var(--text);margin-bottom:14px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;font-size:14px;color:var(--text-2);}
.footer-col a{transition:color .18s ease;}
.footer-col a:hover{color:var(--c-primary);text-decoration:underline;}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-3);
}

/* 响应式 */
@media (max-width:1023px){
  .app{grid-template-columns:1fr;}
  .topbar{display:flex;}
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;
    width:288px;height:100%;
    transform:translateX(-104%);
    transition:transform .2s ease;
    box-shadow:var(--sh-2);
    background:var(--bg);
  }
  .sidebar.is-open{transform:translateX(0);}
  .wrap{padding:0 20px;}
  .page-head{padding:24px 0 36px;}
  .page-h1{font-size:30px;line-height:1.3;}
  .lede{font-size:17px;}
  .sec{padding:52px 0;}
  .sec-title{font-size:24px;}
  .step-body h3{font-size:19px;}
  .cta-band{padding:28px 20px;}
  .footer{padding:44px 0 22px;margin-top:56px;}
}
@media (max-width:640px){
  .head-actions .btn{width:100%;}
  .cta-actions .btn{width:100%;}
  .compare-card{padding:20px;}
  .step{grid-template-columns:40px minmax(0,1fr);gap:14px;}
  .step-num{width:40px;height:40px;font-size:16px;}
  .step::before{left:19px;top:48px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category2 */
:root{
    --green:#17544B; --green-d:#0E3A34; --green-l:#2E7A6D;
    --clay:#C4622D; --gold:#E8B04B;
    --paper:#F7F4EE; --sand:#EFEAE1; --card:#FFFFFF;
    --ink:#1B2422; --ink-2:#4B5654; --ink-3:#7C8683;
    --line:#E0DAD0; --err:#B4442F;
    --r-card:14px; --r-pic:12px; --r-btn:10px;
    --sh-1:0 1px 2px rgba(27,36,34,.06), 0 8px 24px rgba(27,36,34,.05);
    --sh-2:0 2px 5px rgba(27,36,34,.09), 0 18px 38px rgba(27,36,34,.10);
    --serif:"Noto Serif SC","Songti SC",serif;
    --sans:"PingFang SC","HarmonyOS Sans","Noto Sans SC",system-ui,-apple-system,sans-serif;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;background:var(--paper);color:var(--ink);
    font-family:var(--sans);font-size:16px;line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border-radius:var(--r-pic)}
  a{color:inherit;text-decoration:none}
  button,input,textarea,select{font:inherit;color:inherit}
  h1,h2,h3,h4{font-family:var(--serif);font-weight:600;margin:0;letter-spacing:.01em}
  p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  :focus-visible{outline:2px solid var(--clay);outline-offset:2px}
  .skip-link{
    position:absolute;left:12px;top:-60px;z-index:120;background:var(--green);color:#fff;
    padding:10px 16px;border-radius:var(--r-btn);font-size:14px;transition:top .18s ease;
  }
  .skip-link:focus{top:12px}

  /* ---------- 布局骨架 ---------- */
  .container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
  .layout{display:block}
  .site-body{padding-top:64px}

  /* ---------- 移动顶栏 ---------- */
  .mobile-bar{
    position:fixed;inset:0 0 auto 0;height:64px;z-index:90;
    display:flex;align-items:center;justify-content:space-between;
    padding:0 16px;background:rgba(247,244,238,.96);
    border-bottom:1px solid var(--line);backdrop-filter:blur(6px);
  }
  .brand{display:inline-flex;align-items:center;gap:10px}
  .brand-mark{
    width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
    background:var(--green);color:#FFF7EA;font-family:var(--serif);font-size:17px;
    box-shadow:var(--sh-1);flex:none;
  }
  .brand-text{font-family:var(--serif);font-size:17px;font-weight:600;color:var(--ink)}
  .menu-btn{
    width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);
    background:#fff;display:grid;place-items:center;gap:4px;cursor:pointer;
  }
  .menu-btn span{display:block;width:18px;height:2px;background:var(--green);border-radius:2px}

  /* ---------- 抽屉 ---------- */
  .drawer{
    position:fixed;inset:0;z-index:100;background:var(--paper);
    transform:translateX(100%);transition:transform .2s ease;
    display:flex;flex-direction:column;padding:16px 18px 24px;overflow-y:auto;
  }
  .drawer.is-open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
  .drawer-close{
    width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);
    background:#fff;cursor:pointer;color:var(--green);font-size:20px;line-height:1;
  }
  .drawer nav{display:flex;flex-direction:column}
  .drawer nav a{
    height:48px;display:flex;align-items:center;padding:0 14px;border-radius:var(--r-btn);
    font-size:16px;color:var(--ink-2);border-left:3px solid transparent;
  }
  .drawer nav a.is-active{color:var(--green);font-weight:600;background:rgba(23,84,75,.08);border-left-color:var(--clay)}
  .drawer-cta{margin-top:auto;padding-top:22px}
  .drawer-note{margin-top:14px;font-size:13px;color:var(--ink-3);line-height:1.7}

  /* ---------- 侧栏 ---------- */
  .sidebar{display:none}
  .side-links{display:flex;flex-direction:column;gap:2px;margin-top:26px}
  .side-link{
    display:flex;align-items:center;padding:11px 14px;border-radius:var(--r-btn);
    font-size:15px;color:var(--ink-2);border-left:3px solid transparent;
    transition:background .16s ease,color .16s ease;
  }
  .side-link:hover{background:rgba(23,84,75,.06);color:var(--green)}
  .side-link.is-active{
    background:rgba(23,84,75,.08);color:var(--green);font-weight:600;border-left-color:var(--clay);
  }
  .side-foot{margin-top:auto;padding-top:22px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-3);line-height:1.7}
  .side-foot a{color:var(--green)}
  .side-foot a:hover{text-decoration:underline}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:46px;padding:0 22px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
    transition:background .16s ease,color .16s ease,transform .16s ease,box-shadow .16s ease,border-color .16s ease;
    text-align:center;
  }
  .btn-primary{background:var(--green);color:#fff;box-shadow:var(--sh-1)}
  .btn-primary:hover{background:var(--green-d);transform:translateY(-1px);box-shadow:var(--sh-2)}
  .btn-primary:active{transform:none;box-shadow:var(--sh-1)}
  .btn-primary:disabled{opacity:.45;cursor:not-allowed;transform:none}
  .btn-ghost{background:transparent;border:1.5px solid var(--green);color:var(--green)}
  .btn-ghost:hover{background:rgba(23,84,75,.08)}
  .btn-onDark{background:var(--paper);color:var(--green-d);border-color:var(--paper)}
  .btn-onDark:hover{background:#fff;transform:translateY(-1px);box-shadow:0 12px 28px rgba(0,0,0,.25)}
  .btn-outlineLight{background:transparent;border:1.5px solid rgba(247,244,238,.65);color:#F7F4EE}
  .btn-outlineLight:hover{background:rgba(247,244,238,.12)}

  /* ---------- 面包屑 ---------- */
  .crumbs{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:var(--ink-3);padding:20px 0 12px;
  }
  .crumbs a:hover{color:var(--green);text-decoration:underline}
  .crumbs .sep{color:var(--line)}
  .crumbs .current{color:var(--green);font-weight:600}

  /* ---------- 板块通用 ---------- */
  .section{padding:56px 0}
  .section-tight{padding:44px 0}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
    color:var(--clay);letter-spacing:.06em;margin-bottom:12px;
  }
  .eyebrow::before{content:"";width:22px;height:2px;background:var(--clay);display:block}
  .h2{font-size:24px;line-height:1.35;color:var(--ink)}
  .h2-line{width:40px;height:3px;background:var(--clay);border-radius:2px;margin:14px 0 18px}
  .lead{font-size:17px;line-height:1.85;color:var(--ink-2);max-width:760px}
  .h3{font-size:19px;line-height:1.5;color:var(--ink)}
  .muted{color:var(--ink-3);font-size:13.5px}

  /* ---------- Banner ---------- */
  .banner{
    position:relative;overflow:hidden;border-radius:16px;
    min-height:300px;display:flex;align-items:flex-end;
  }
  .banner-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:0}
  .banner-mask{
    position:absolute;inset:0;
    background:linear-gradient(100deg, rgba(14,58,52,.88) 8%, rgba(23,84,75,.55) 55%, rgba(23,84,75,.32) 100%);
  }
  .banner-inner{position:relative;z-index:2;padding:38px 30px 34px;max-width:760px}
  .banner h1{font-size:30px;line-height:1.3;color:#FFFDF8;margin-bottom:14px}
  .banner p{font-size:16px;line-height:1.85;color:rgba(255,253,248,.88)}
  .banner .rule{width:40px;height:3px;background:var(--clay);border-radius:2px;margin-bottom:18px}
  .banner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
  .banner-tag{
    font-size:13px;padding:5px 12px;border-radius:999px;
    border:1px solid rgba(255,253,248,.4);color:#FFFDF8;background:rgba(255,253,248,.1);
  }

  /* ---------- 能力卡片 ---------- */
  .card-grid{display:grid;grid-template-columns:1fr;gap:16px;margin-top:28px}
  .fcard{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
    overflow:hidden;box-shadow:var(--sh-1);
    transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  }
  .fcard:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--green-l)}
  .fcard-img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0}
  .fcard-body{padding:20px 22px 22px}
  .fcard h3{font-size:18px;line-height:1.5;margin-bottom:8px}
  .fcard p{font-size:14.5px;line-height:1.8;color:var(--ink-2)}
  .fcard ul{margin-top:12px;display:flex;flex-direction:column;gap:7px}
  .fcard li{position:relative;padding-left:16px;font-size:14px;color:var(--ink-2)}
  .fcard li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:2px;background:var(--green-l)}
  .badge{
    display:inline-block;padding:4px 11px;border-radius:999px;
    background:rgba(23,84,75,.08);color:var(--green);font-size:12.5px;font-weight:600;
    margin-bottom:10px;
  }

  /* ---------- 步骤 ---------- */
  .steps{margin-top:30px;display:grid;gap:0}
  .step{position:relative;display:grid;grid-template-columns:44px 1fr;gap:16px;padding-bottom:30px}
  .step:last-child{padding-bottom:0}
  .step:not(:last-child)::before{
    content:"";position:absolute;left:17px;top:44px;bottom:6px;width:2px;background:var(--line);
  }
  .step-num{
    width:36px;height:36px;border-radius:999px;border:1.5px solid var(--clay);
    background:#fff;color:var(--green);font-family:var(--serif);font-size:16px;
    display:grid;place-items:center;position:relative;z-index:1;
  }
  .step h3{font-size:17px;font-weight:600;font-family:var(--sans);margin-bottom:6px}
  .step p{font-size:15px;color:var(--ink-2);line-height:1.85}
  .step .result{
    display:inline-flex;align-items:center;gap:8px;margin-top:10px;
    font-size:13.5px;color:var(--green);background:rgba(23,84,75,.07);
    padding:6px 12px;border-radius:999px;
  }

  /* ---------- 对照表 ---------- */
  .table-wrap{
    margin-top:26px;overflow-x:auto;border:1px solid var(--line);
    border-radius:var(--r-card);background:#fff;box-shadow:var(--sh-1);
  }
  table.zebra{width:100%;min-width:660px;border-collapse:collapse}
  .zebra caption{
    text-align:left;padding:18px 20px 6px;font-size:13.5px;color:var(--ink-3);
  }
  .zebra th{
    background:var(--sand);font-size:13.5px;font-weight:600;color:var(--ink);
    text-align:left;padding:14px 20px;white-space:nowrap;
  }
  .zebra td{
    padding:15px 20px;border-top:1px solid var(--line);
    font-size:15px;color:var(--ink-2);line-height:1.75;vertical-align:top;
  }
  .zebra td:first-child{font-weight:600;color:var(--ink);white-space:nowrap}
  .zebra tbody tr:nth-child(even){background:#FAF8F4}
  .zebra tbody tr:hover{background:rgba(46,122,109,.06)}
  .state-yes{color:var(--green);font-weight:600}
  .state-part{color:var(--clay);font-weight:600}

  /* ---------- FAQ ---------- */
  .faq{margin-top:24px;border-top:1px solid var(--line)}
  .faq details{border-bottom:1px solid var(--line)}
  .faq summary{
    list-style:none;cursor:pointer;position:relative;
    display:flex;align-items:center;min-height:58px;
    padding:16px 44px 16px 0;font-size:17px;font-weight:600;color:var(--ink);
    transition:color .16s ease;
  }
  .faq summary::-webkit-details-marker{display:none}
  .faq summary::after{
    content:"";position:absolute;right:10px;top:50%;width:9px;height:9px;
    border-right:2px solid var(--green);border-bottom:2px solid var(--green);
    transform:translateY(-70%) rotate(45deg);transition:transform .18s ease;
  }
  .faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
  .faq summary:hover{color:var(--green)}
  .faq .answer{padding:0 44px 20px 0;font-size:16px;line-height:1.9;color:var(--ink-2)}

  /* ---------- CTA ---------- */
  .cta{
    background:var(--green-d);border-radius:16px;color:#F3F1EA;
    padding:34px 24px;display:grid;gap:28px;
  }
  .cta h2{font-size:24px;line-height:1.35;color:#FFFDF8}
  .cta .cta-rule{width:40px;height:3px;background:var(--clay);border-radius:2px;margin:14px 0 16px}
  .cta p{font-size:16px;line-height:1.85;color:rgba(243,241,234,.85)}
  .cta-points{margin-top:20px;display:flex;flex-direction:column;gap:10px}
  .cta-points li{position:relative;padding-left:18px;font-size:15px;color:rgba(243,241,234,.9)}
  .cta-points li::before{
    content:"";position:absolute;left:0;top:10px;width:7px;height:7px;
    border-radius:2px;background:var(--gold);
  }
  .form-card{background:#fff;border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-2);color:var(--ink)}
  .form-card h3{font-size:19px;margin-bottom:6px}
  .form-card .form-tip{font-size:13.5px;color:var(--ink-3);margin-bottom:18px}
  .field{margin-bottom:16px}
  .field label{display:block;font-size:13px;font-weight:600;color:var(--ink-2);margin-bottom:7px}
  .field input,.field textarea{
    width:100%;min-height:47px;padding:11px 13px;border-radius:var(--r-btn);
    border:1px solid var(--line);background:#FCFBF8;font-size:15px;
    transition:border-color .16s ease,box-shadow .16s ease,background .16s ease;
  }
  .field textarea{min-height:92px;resize:vertical;line-height:1.7}
  .field input:hover,.field textarea:hover{border-color:var(--green-l)}
  .field input:focus,.field textarea:focus{
    outline:none;border-color:var(--green);background:#fff;
    box-shadow:0 0 0 3px rgba(23,84,75,.10);
  }
  .field.has-error input,.field.has-error textarea{border-color:var(--err)}
  .field .err-msg{display:none;margin-top:6px;font-size:12.5px;color:var(--err)}
  .field.has-error .err-msg{display:block}
  .form-actions{display:flex;flex-direction:column;gap:12px;margin-top:20px}
  .privacy{font-size:12.5px;color:var(--ink-3);line-height:1.7;margin-top:14px}

  /* ---------- 页脚 ---------- */
  .footer{background:var(--sand);border-top:1px solid var(--line);margin-top:64px;padding:52px 0 22px}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:30px}
  .footer-desc{margin-top:14px;font-size:14px;line-height:1.85;color:var(--ink-2);max-width:300px}
  .footer-col h4{font-family:var(--sans);font-size:14px;font-weight:600;color:var(--ink);margin-bottom:14px}
  .footer-col ul{display:flex;flex-direction:column;gap:10px}
  .footer-col li{font-size:14px;color:var(--ink-2);line-height:1.7}
  .footer-col a{color:var(--ink-2)}
  .footer-col a:hover{color:var(--green);text-decoration:underline}
  .footer-bottom{
    margin-top:38px;padding-top:18px;border-top:1px solid var(--line);
    display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--ink-3);
  }

  @media (min-width:640px){
    .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
    .form-actions{flex-direction:row;justify-content:flex-end;align-items:center}
    .footer-bottom{flex-direction:row;justify-content:space-between;align-items:center}
    .banner-inner{padding:46px 40px 42px}
    .banner h1{font-size:34px}
  }
  @media (min-width:768px){
    .section{padding:64px 0}
    .h2{font-size:27px}
    .cta{padding:44px 40px;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start;gap:40px}
    .footer{padding:60px 0 24px}
    .footer-grid{grid-template-columns:2fr 1fr 1fr;gap:34px}
  }
  @media (min-width:1024px){
    .site-body{padding-top:0}
    .mobile-bar{display:none}
    .layout{display:grid;grid-template-columns:236px minmax(0,1fr)}
    .sidebar{
      display:flex;flex-direction:column;position:sticky;top:0;height:100vh;
      padding:26px 20px 26px 24px;border-right:1px solid var(--line);
      background:var(--paper);
    }
    .sidebar .btn{margin-top:22px}
    .banner{min-height:380px}
    .banner h1{font-size:38px}
    .section{padding:80px 0}
    .h2{font-size:30px}
    .lead{font-size:18px}
    .cta{padding:52px 48px}
    .cta h2{font-size:28px}
    .footer-grid{grid-template-columns:2.2fr 1fr 1fr 1.2fr}
    .side-link{font-size:14.5px}
  }
  @media (min-width:1280px){
    .banner h1{font-size:42px;line-height:1.25}
  }
  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
  }