/* roulang page: index */
:root{
  --paper:#F7F4EF;
  --surface:#FFFFFF;
  --ink:#0E1B1A;
  --ink-deep:#0B2321;
  --ink-soft:#4A5A58;
  --line:#E4DED4;
  --primary:#0E6F68;
  --primary-deep:#084C48;
  --primary-tint:#DCEFEA;
  --accent:#FF6F3C;
  --accent-tint:#FFE7DC;
  --danger:#C9452F;
  --radius-lg:20px;
  --radius-md:16px;
  --radius-sm:12px;
  --shadow-sm:0 1px 2px rgba(14,27,26,.05);
  --shadow-md:0 12px 30px -14px rgba(14,27,26,.20);
  --shadow-lg:0 24px 60px -24px rgba(14,27,26,.28);
  --shell:248px;
}
*,*::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:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",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,input{font:inherit;color:inherit;}
h1,h2,h3,h4{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;margin:0;color:var(--ink);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}

.wrap{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;}
@media(min-width:768px){.wrap{padding-left:32px;padding-right:32px;}}
@media(min-width:1280px){.wrap{padding-left:48px;padding-right:48px;}}

.section{padding-top:64px;padding-bottom:64px;}
@media(min-width:768px){.section{padding-top:96px;padding-bottom:96px;}}
@media(min-width:1280px){.section{padding-top:112px;padding-bottom:112px;}}

.eyebrow{
  font-size:.75rem;letter-spacing:.08em;color:var(--primary);
  text-transform:none;font-weight:600;margin-bottom:14px;
  display:inline-flex;align-items:center;gap:8px;
}
.eyebrow::before{content:"";width:20px;height:2px;background:var(--accent);display:inline-block;border-radius:2px;}
.h2{font-size:clamp(1.6rem,2.6vw,2.35rem);line-height:1.3;font-weight:600;letter-spacing:-.01em;}
.section-sub{color:var(--ink-soft);font-size:.95rem;margin-top:12px;max-width:620px;}

/* ---------- App shell ---------- */
.shell-side{
  position:fixed;top:0;left:0;width:var(--shell);height:100vh;
  background:var(--ink-deep);
  border-right:1px solid rgba(255,255,255,.08);
  display:none;flex-direction:column;padding:22px 18px 18px;z-index:60;
}
@media(min-width:1024px){.shell-side{display:flex;}}
.shell-main{padding-top:60px;}
@media(min-width:1024px){.shell-main{padding-left:var(--shell);padding-top:0;}}

.brand{display:flex;align-items:flex-start;gap:10px;padding-bottom:18px;border-bottom:1px solid rgba(255,255,255,.09);}
.brand-mark{width:20px;height:20px;flex:0 0 20px;margin-top:3px;}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-cn{font-size:15px;font-weight:600;color:#fff;letter-spacing:.01em;}
.brand-en{font-size:11px;letter-spacing:.12em;color:rgba(255,255,255,.5);margin-top:2px;}

.nav-group-title{font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.4);margin:20px 0 8px;padding-left:10px;}
.side-nav{display:flex;flex-direction:column;gap:2px;margin-top:14px;}
.nav-link{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 10px;border-radius:10px;
  font-size:14px;color:rgba(255,255,255,.72);
  transition:background .2s ease,color .2s ease;
}
.nav-link svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;flex:0 0 18px;}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.06);}
.nav-link[aria-current="page"]{color:#fff;background:rgba(255,255,255,.08);}
.nav-link[aria-current="page"]::before{
  content:"";position:absolute;left:-18px;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:0 3px 3px 0;background:var(--accent);
}
.side-foot{margin-top:auto;padding-top:18px;border-top:1px solid rgba(255,255,255,.09);}
.side-note{font-size:11px;color:rgba(255,255,255,.42);line-height:1.7;margin-top:12px;}

.topbar{
  position:fixed;top:0;left:0;right:0;height:60px;z-index:70;
  background:var(--ink-deep);display:flex;align-items:center;justify-content:space-between;
  padding:0 18px;border-bottom:1px solid rgba(255,255,255,.08);
}
@media(min-width:1024px){.topbar{display:none;}}
.burger{
  width:44px;height:44px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:6px;
  background:none;border:0;cursor:pointer;
}
.burger span{display:block;width:22px;height:2px;background:#fff;border-radius:2px;transition:transform .24s cubic-bezier(.22,.8,.3,1),opacity .18s;}
.burger.is-open span:nth-child(1){transform:translateY(4px) rotate(45deg);}
.burger.is-open span:nth-child(2){transform:translateY(-4px) rotate(-45deg);}

.drawer-mask{
  position:fixed;inset:0;background:rgba(11,35,33,.5);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:min(280px,82vw);z-index:90;
  background:var(--ink-deep);padding:22px 18px 18px;overflow-y:auto;
  transform:translateX(-102%);transition:transform .24s cubic-bezier(.22,.8,.3,1);
  display:flex;flex-direction:column;
}
.drawer.is-open{transform:translateX(0);}
body.drawer-lock{overflow:hidden;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease;
}
.btn svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s ease;}
.btn:hover svg{transform:translateX(3px);}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accentdeep);transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn-primary:active{transform:translateY(0) scale(.99);}
.btn-ghost{background:#fff;border-color:var(--primary);color:var(--primary);}
.btn-ghost:hover{background:var(--primary-tint);border-color:var(--primary-deep);}
.btn-block{width:100%;padding:0 18px;}
.link-more{
  display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14px;font-weight:600;
  background-image:linear-gradient(var(--primary),var(--primary));
  background-repeat:no-repeat;background-size:0% 1px;background-position:0 100%;
  transition:background-size .24s ease;
  padding-bottom:2px;
}
.link-more:hover{background-size:100% 1px;}
.link-more svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s ease;}
.link-more:hover svg{transform:translateX(3px);}

/* ---------- Hero ---------- */
.hero{padding-top:44px;padding-bottom:56px;}
@media(min-width:768px){.hero{padding-top:72px;padding-bottom:88px;}}
@media(min-width:1280px){.hero{padding-top:92px;padding-bottom:104px;}}
.hero-grid{display:grid;grid-template-columns:1fr;gap:40px;}
@media(min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:48px;align-items:center;}}
.hero h1{
  font-size:clamp(2.4rem,5vw,4rem);font-weight:700;line-height:1.14;letter-spacing:-.02em;
  max-width:14em;
}
.hero-lead{margin-top:20px;font-size:1.0625rem;color:var(--ink-soft);max-width:34em;line-height:1.85;}
.trust-row{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:22px;font-size:13px;color:var(--ink-soft);letter-spacing:.02em;}
.trust-row li{display:flex;align-items:center;gap:8px;}
.trust-row li::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--accent);display:inline-block;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px;}
.hero-visual{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);aspect-ratio:4/5;}
.hero-visual img{width:100%;height:100%;object-fit:cover;}
.hero-visual::after{content:"";position:absolute;inset:12px;border:1px solid rgba(255,255,255,.6);border-radius:12px;pointer-events:none;}
.hero-tag{
  position:absolute;left:20px;bottom:20px;background:var(--accent);color:#fff;
  font-size:12px;font-weight:600;letter-spacing:.04em;padding:6px 14px;border-radius:999px;
}

/* ---------- Pain list ---------- */
.pain-list{max-width:900px;margin-top:36px;border-top:1px solid var(--line);}
.pain-item{display:flex;gap:20px;padding:24px 0;border-bottom:1px solid var(--line);}
.pain-num{
  font-family:"Noto Serif SC",serif;font-size:1.05rem;font-weight:700;color:var(--accent);
  flex:0 0 40px;line-height:1.7;
}
.pain-item h3{font-family:inherit;font-size:1.0625rem;font-weight:600;line-height:1.6;}
.pain-item p{color:var(--ink-soft);font-size:.9375rem;margin-top:4px;}

/* ---------- Solution zigzag ---------- */
.zig{display:grid;grid-template-columns:1fr;gap:28px;align-items:center;margin-top:56px;}
@media(min-width:768px){.zig{grid-template-columns:1fr 1fr;gap:48px;}}
.zig.reverse .zig-media{order:-1;}
@media(min-width:768px){.zig.reverse .zig-media{order:-1;}}
.zig-media{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);aspect-ratio:16/10;}
.zig-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.zig-media:hover img{transform:scale(1.03);}
.zig h3{font-size:1.25rem;font-weight:600;line-height:1.5;margin-top:12px;}
.zig p{color:var(--ink-soft);font-size:.95rem;margin-top:12px;}
.zig-points{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.zig-points li{display:flex;gap:10px;font-size:.9375rem;color:var(--ink);}
.zig-points li::before{content:"";width:6px;height:6px;background:var(--accent);margin-top:9px;flex:0 0 6px;border-radius:1px;}
.tag-pill{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.04em;
  color:var(--primary);background:var(--primary-tint);padding:4px 10px;border-radius:999px;
}

/* ---------- Metrics band ---------- */
.band{background:var(--ink-deep);color:#fff;padding:64px 0;}
@media(min-width:768px){.band{padding:80px 0;}}
.band h2{color:#fff;}
.metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:0;margin-top:40px;}
@media(min-width:1024px){.metrics{grid-template-columns:repeat(4,1fr);}}
.metric{padding:18px 22px;border-left:1px solid rgba(255,255,255,.12);}
.metric:first-child{border-left:0;padding-left:0;}
.metric-num{font-family:"Noto Serif SC",serif;font-size:clamp(2.2rem,4vw,3.2rem);font-weight:700;color:var(--accent);line-height:1.1;font-variant-numeric:tabular-nums;}
.metric-label{font-size:13px;color:rgba(255,255,255,.72);margin-top:10px;}

/* ---------- Testimonials ---------- */
.quote-grid{display:grid;grid-template-columns:1fr;gap:24px;margin-top:36px;}
@media(min-width:768px){.quote-grid{grid-template-columns:7fr 5fr;}}
.quote-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:32px;box-shadow:var(--shadow-sm);
}
.quote-mark{font-family:"Noto Serif SC",serif;font-size:36px;line-height:1;color:var(--accent);}
.quote-text{font-size:1.0625rem;line-height:1.9;margin-top:14px;color:var(--ink);}
.quote-foot{display:flex;align-items:center;gap:12px;margin-top:24px;padding-top:20px;border-top:1px solid var(--line);}
.avatar{width:40px;height:40px;border-radius:50%;overflow:hidden;flex:0 0 40px;background:var(--primary-tint);}
.avatar img{width:100%;height:100%;object-fit:cover;}
.quote-name{font-size:.875rem;font-weight:600;}
.quote-role{font-size:13px;color:var(--ink-soft);}
.mini-quotes{display:flex;flex-direction:column;gap:16px;}
.mini-quote{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:22px;box-shadow:var(--shadow-sm);
}
.mini-quote p{font-size:.9375rem;color:var(--ink);line-height:1.8;}
.mini-quote span{display:block;font-size:13px;color:var(--ink-soft);margin-top:10px;}

/* ---------- CMS cards ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;}
.news-grid{display:grid;grid-template-columns:1fr;gap:24px;margin-top:36px;}
@media(min-width:1024px){.news-grid{grid-template-columns:7fr 5fr;}}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow-sm);display:block;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(14,111,104,.35);}
.card-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--primary-tint);}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.card:hover .card-cover img{transform:scale(1.03);}
.badge-cat{
  position:absolute;left:16px;top:16px;background:var(--primary-tint);color:var(--primary);
  font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;
}
.badge-cat.is-accent{background:var(--accent);color:#fff;}
.card-body{padding:24px;}
.card-title{font-size:1.125rem;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-excerpt{color:var(--ink-soft);font-size:.9375rem;margin-top:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{display:flex;align-items:center;gap:10px;margin-top:18px;font-size:.8125rem;color:var(--ink-soft);letter-spacing:.02em;font-variant-numeric:tabular-nums;}
.card-meta .dot{color:var(--line);}
.mini-list{display:flex;flex-direction:column;gap:16px;margin-top:0;}
.mini-card{
  display:flex;gap:16px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-md);padding:16px;box-shadow:var(--shadow-sm);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.mini-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(14,111,104,.35);}
.mini-card .thumb{width:88px;height:88px;flex:0 0 88px;border-radius:12px;overflow:hidden;background:var(--primary-tint);}
.mini-card .thumb img{width:100%;height:100%;object-fit:cover;}
.mini-card h3{font-size:.9375rem;font-weight:600;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.mini-card .card-meta{margin-top:8px;}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--radius-lg);background:var(--surface);
  padding:48px 24px;text-align:center;
}
.empty-state svg{width:48px;height:48px;stroke:var(--primary);fill:none;stroke-width:1.4;margin:0 auto 16px;}
.empty-state p{color:var(--ink-soft);font-size:14px;margin-bottom:16px;}

/* ---------- FAQ ---------- */
.faq{margin-top:36px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:0;}
.faq-item summary{
  list-style:none;cursor:pointer;height:60px;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:0 24px;font-size:16px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-plus{position:relative;width:16px;height:16px;flex:0 0 16px;}
.faq-plus::before,.faq-plus::after{content:"";position:absolute;background:var(--ink-soft);border-radius:2px;transition:transform .22s ease,background .22s ease;}
.faq-plus::before{left:0;top:7px;width:16px;height:2px;}
.faq-plus::after{left:7px;top:0;width:2px;height:16px;}
.faq-item[open] .faq-plus::after{transform:rotate(90deg);background:var(--accent);}
.faq-item[open] .faq-plus::before{background:var(--accent);}
.faq-answer{padding:0 24px 20px;color:var(--ink-soft);font-size:15px;line-height:1.85;}

/* ---------- CTA ---------- */
.cta-band{background:var(--primary-tint);}
.cta-grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:start;}
@media(min-width:1024px){.cta-grid{grid-template-columns:7fr 5fr;gap:56px;}}
.cta-band h2{font-size:clamp(1.6rem,2.6vw,2.35rem);line-height:1.3;font-weight:600;}
.cta-band p.lead{color:var(--ink-soft);margin-top:14px;max-width:30em;}
.form-card{background:var(--surface);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-md);}
.field{margin-bottom:20px;}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:8px;}
.field input{
  width:100%;height:48px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:#fff;transition:border-color .2s ease,box-shadow .2s ease;
}
.field input::placeholder{color:rgba(74,90,88,.6);}
.field input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(14,111,104,.18);}
.form-note{font-size:12px;color:var(--ink-soft);margin-top:14px;line-height:1.7;}

/* ---------- Footer ---------- */
.site-foot{background:var(--ink-deep);color:rgba(255,255,255,.72);padding:56px 0 28px;}
.foot-grid{display:grid;grid-template-columns:1fr;gap:32px;}
@media(min-width:768px){.foot-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.foot-grid{grid-template-columns:repeat(4,1fr);}}
.foot-brand-cn{color:#fff;font-size:15px;font-weight:600;}
.foot-brand-en{font-size:11px;letter-spacing:.12em;color:rgba(255,255,255,.5);margin-top:4px;}
.foot-desc{font-size:13px;margin-top:14px;padding-top:14px;border-top:1px solid rgba(14,111,104,.6);line-height:1.8;}
.foot-title{color:#fff;font-size:14px;font-weight:600;margin-bottom:14px;}
.foot-links{display:flex;flex-direction:column;gap:10px;}
.foot-links a{font-size:13px;color:rgba(255,255,255,.72);transition:color .2s ease;}
.foot-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.foot-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:12px;color:rgba(255,255,255,.5);
}

/* ---------- Motion ---------- */
.rise{opacity:0;transform:translateY(12px);animation:rise .4s ease-out forwards;}
.rise.d1{animation-delay:.06s;}
.rise.d2{animation-delay:.12s;}
.rise.d3{animation-delay:.18s;}
.rise.d4{animation-delay:.24s;}
@keyframes rise{to{opacity:1;transform:translateY(0);}}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .rise{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
    --paper:#F7F4EF;
    --surface:#FFFFFF;
    --ink:#0E1B1A;
    --ink-deep:#0B2321;
    --ink-soft:#4A5A58;
    --line:#E4DED4;
    --primary:#0E6F68;
    --primary-deep:#084C48;
    --primary-tint:#DCEFEA;
    --accent:#FF6F3C;
    --accent-deep:#E85F2E;
    --accent-tint:#FFE7DC;
    --danger:#C9452F;
    --shadow-sm:0 1px 2px rgba(14,27,26,.05);
    --shadow-md:0 12px 30px -14px rgba(14,27,26,.20);
    --shadow-lg:0 24px 60px -24px rgba(14,27,26,.28);
    --sans:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
    --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",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;text-rendering:optimizeLegibility;
  }
  body.locked{overflow:hidden}
  img{display:block;max-width:100%;height:auto}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
  .wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
  @media (min-width:768px){.wrap{padding:0 32px}}
  @media (min-width:1280px){.wrap{padding:0 48px}}

  /* ---------- 移动端顶栏 ---------- */
  .topbar{
    position:fixed;top:0;left:0;right:0;height:60px;z-index:50;
    background:var(--ink-deep);display:flex;align-items:center;justify-content:space-between;
    padding:0 18px;border-bottom:1px solid rgba(255,255,255,.08);
  }
  .topbar-brand{font-size:15px;font-weight:600;color:#fff;letter-spacing:.02em}
  .menu-btn{width:44px;height:44px;display:flex;flex-direction:column;justify-content:center;align-items:flex-end;gap:6px;margin-right:-8px}
  .menu-btn span{display:block;width:22px;height:2px;background:#fff;border-radius:2px;transition:transform .24s cubic-bezier(.22,.8,.3,1),opacity .2s}
  .menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(4px) rotate(45deg)}
  .menu-btn[aria-expanded="true"] span:nth-child(2){transform:translateY(-4px) rotate(-45deg)}
  @media (min-width:1024px){.topbar{display:none}}

  /* ---------- 左侧 App Shell ---------- */
  .sidebar{
    position:fixed;top:0;left:0;width:248px;height:100vh;z-index:70;
    background:var(--ink-deep);display:flex;flex-direction:column;
    border-right:1px solid rgba(255,255,255,.08);
    transform:translateX(-100%);transition:transform .24s cubic-bezier(.22,.8,.3,1);
  }
  .sidebar.open{transform:translateX(0)}
  @media (min-width:1024px){.sidebar{transform:translateX(0)}}
  .scrim{
    position:fixed;inset:0;background:rgba(11,35,33,.5);z-index:65;
    opacity:0;pointer-events:none;transition:opacity .24s ease;
  }
  .scrim.show{opacity:1;pointer-events:auto}
  @media (min-width:1024px){.scrim{display:none}}

  .side-brand{display:flex;align-items:center;gap:11px;padding:22px 22px 18px;border-bottom:1px solid rgba(255,255,255,.08)}
  .side-brand .mark{width:26px;height:26px;flex:none;display:grid;place-items:center;background:rgba(255,111,60,.14);border-radius:8px}
  .side-brand .mark svg{width:18px;height:18px;display:block}
  .brand-txt{display:flex;flex-direction:column;line-height:1.25}
  .brand-txt .b1{font-size:15px;font-weight:600;color:#fff;letter-spacing:.02em}
  .brand-txt .b2{font-size:11px;letter-spacing:.12em;color:rgba(255,255,255,.55)}

  .sidebar-scroll{flex:1;overflow-y:auto;padding:18px 0 12px}
  .nav-label{font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.4);padding:0 26px;margin:6px 0 10px}
  .side-nav{display:flex;flex-direction:column;gap:3px;padding:0 12px}
  .nav-link{
    position:relative;display:flex;align-items:center;gap:12px;height:44px;
    padding:0 14px;border-radius:10px;font-size:14px;
    color:rgba(255,255,255,.72);
    transition:background .2s ease,color .2s ease;
  }
  .nav-link svg{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
  .nav-link:hover{background:rgba(255,255,255,.06);color:#fff}
  .nav-link[aria-current="page"]{background:rgba(255,255,255,.08);color:#fff}
  .nav-link[aria-current="page"]::before{
    content:"";position:absolute;left:-12px;top:11px;bottom:11px;width:3px;
    background:var(--accent);border-radius:0 3px 3px 0;
  }
  .side-foot{padding:16px 20px 20px;border-top:1px solid rgba(255,255,255,.08)}
  .side-cta{
    display:flex;align-items:center;justify-content:center;height:44px;border-radius:999px;
    background:var(--accent);color:#fff;font-size:14px;font-weight:600;
    transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
  }
  .side-cta:hover{background:var(--accent-deep);transform:translateY(-1px);box-shadow:var(--shadow-md)}
  .side-cta:active{transform:translateY(0)}
  .side-note{margin-top:12px;font-size:11px;line-height:1.6;color:rgba(255,255,255,.4)}

  /* ---------- 主内容 ---------- */
  .main{display:flex;flex-direction:column;min-height:100vh;padding-top:60px}
  @media (min-width:1024px){.main{padding-top:0;padding-left:248px}}

  /* ---------- 面包屑 ---------- */
  .crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-soft);padding:26px 0 18px}
  .crumb a{transition:color .2s ease}
  .crumb a:hover{color:var(--primary)}
  .crumb .sep{color:rgba(74,90,88,.5)}
  .crumb .cur{color:var(--ink);max-width:22em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

  /* ---------- 文章头部 ---------- */
  .post-head{max-width:860px;padding-bottom:26px;animation:rise .5s ease-out both}
  .post-head .eyebrow{
    display:inline-block;font-size:12px;letter-spacing:.08em;color:var(--primary);
    background:var(--primary-tint);border-radius:999px;padding:4px 12px;margin-bottom:16px;
  }
  .post-head h1{
    font-family:var(--serif);font-weight:700;
    font-size:clamp(1.9rem,3.2vw,2.9rem);line-height:1.25;letter-spacing:-.01em;
    margin:0 0 20px;color:var(--ink);
  }
  .meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--ink-soft)}
  .meta-row .chip{
    display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
    background:var(--accent);color:#fff;font-size:12px;font-weight:600;letter-spacing:.02em;
  }
  .meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
  .meta-row time{font-variant-numeric:tabular-nums}

  /* ---------- 封面 ---------- */
  .post-cover{margin:0 0 32px;border-radius:20px;overflow:hidden;background:var(--primary-tint);box-shadow:var(--shadow-sm)}
  .post-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}

  /* ---------- 正文卡片 ---------- */
  .post-card{
    background:var(--surface);border:1px solid var(--line);border-radius:20px;
    box-shadow:var(--shadow-sm);padding:32px 24px;
  }
  @media (min-width:768px){.post-card{padding:48px 56px}}
  .article-body{max-width:46em;font-size:1.0625rem;line-height:1.95;color:var(--ink)}
  .article-body p{margin:0 0 1.5em}
  .article-body h2{
    font-family:var(--serif);font-weight:600;font-size:clamp(1.35rem,2.2vw,1.6rem);
    line-height:1.35;margin:48px 0 16px;padding-left:14px;position:relative;
  }
  .article-body h2::before{
    content:"";position:absolute;left:0;top:.34em;width:4px;height:1em;
    background:var(--accent);border-radius:2px;
  }
  .article-body h2:first-child{margin-top:0}
  .article-body h3{font-size:1.15rem;font-weight:600;line-height:1.5;margin:32px 0 12px}
  .article-body ul,.article-body ol{margin:0 0 1.5em;padding-left:0;list-style:none}
  .article-body ul li{position:relative;padding-left:24px;margin-bottom:10px}
  .article-body ul li::before{content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--accent)}
  .article-body ol{counter-reset:olist}
  .article-body ol li{position:relative;padding-left:34px;margin-bottom:12px;counter-increment:olist}
  .article-body ol li::before{
    content:counter(olist,decimal-leading-zero);position:absolute;left:0;top:.1em;
    font-family:var(--serif);font-size:.95rem;color:var(--accent);font-weight:700;
  }
  .article-body blockquote{
    margin:28px 0;padding:20px 24px;background:var(--primary-tint);
    border-left:3px solid var(--accent);border-radius:0 14px 14px 0;color:var(--ink);
  }
  .article-body blockquote p:last-child{margin-bottom:0}
  .article-body img{border-radius:16px;margin:28px 0}
  .article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:3px}
  .article-body a:hover{color:var(--primary-deep)}
  .article-body table{width:100%;border-collapse:collapse;margin:28px 0;font-size:.98rem}
  .article-body th,.article-body td{border-bottom:1px solid var(--line);padding:12px 10px;text-align:left}
  .article-body th{font-weight:600;color:var(--ink)}
  .article-body pre{
    background:#F1EDE6;border:1px solid var(--line);border-radius:12px;
    padding:16px 18px;overflow-x:auto;font-size:.92rem;line-height:1.7;
  }
  .article-body code{background:#F1EDE6;border-radius:6px;padding:2px 6px;font-size:.92em}
  .article-body pre code{background:none;padding:0}
  .article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}

  /* ---------- 空态 ---------- */
  .empty-state{
    border:1px dashed var(--line);border-radius:20px;padding:56px 24px;text-align:center;
  }
  .empty-state .empty-ico{
    width:48px;height:48px;margin:0 auto 16px;border-radius:14px;background:var(--primary-tint);
    display:grid;place-items:center;
  }
  .empty-state .empty-ico svg{width:22px;height:22px;fill:none;stroke:var(--primary);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
  .empty-state p{margin:0 0 20px;font-size:15px;color:var(--ink-soft)}

  /* ---------- 按钮 ---------- */
  .btn-primary{
    display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 26px;border-radius:999px;
    background:var(--accent);color:#fff;font-size:15px;font-weight:600;
    transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
  }
  .btn-primary:hover{background:var(--accent-deep);transform:translateY(-1px);box-shadow:var(--shadow-md)}
  .btn-primary:active{transform:translateY(0) scale(.99)}
  .btn-primary svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s ease}
  .btn-primary:hover svg{transform:translateX(3px)}
  .btn-ghost{
    display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 24px;border-radius:999px;
    background:var(--surface);border:1px solid var(--primary);color:var(--primary);
    font-size:14px;font-weight:600;transition:background .2s ease,border-color .2s ease,color .2s ease;
  }
  .btn-ghost:hover{background:var(--primary-tint);border-color:var(--primary-deep);color:var(--primary-deep)}
  .link-more{
    display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary);
    background-image:linear-gradient(var(--primary),var(--primary));
    background-repeat:no-repeat;background-position:0 100%;background-size:0 1px;
    padding-bottom:3px;transition:background-size .24s ease,color .2s ease;
  }
  .link-more:hover{background-size:100% 1px;color:var(--primary-deep)}

  /* ---------- 标签 ---------- */
  .tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:32px 0 0}
  .tag{
    display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:999px;
    background:var(--primary-tint);color:var(--primary);font-size:12px;letter-spacing:.04em;
    transition:background .2s ease,color .2s ease;
  }
  .tag:hover{background:var(--accent-tint);color:var(--accent-deep)}

  /* ---------- 上一篇 / 下一篇 ---------- */
  .pn-grid{display:grid;grid-template-columns:1fr;gap:18px;margin-top:40px}
  @media (min-width:768px){.pn-grid{grid-template-columns:1fr 1fr}}
  .pn-card{
    display:block;background:var(--surface);border:1px solid var(--line);border-radius:16px;
    padding:22px 24px;box-shadow:var(--shadow-sm);
    transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  }
  .pn-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(14,111,104,.35)}
  .pn-label{display:block;font-size:12px;letter-spacing:.08em;color:var(--accent);margin-bottom:8px}
  .pn-title{
    font-size:1.05rem;font-weight:600;line-height:1.5;color:var(--ink);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }

  /* ---------- 相关推荐 ---------- */
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin:56px 0 24px}
  .section-head h2{font-family:var(--serif);font-weight:600;font-size:clamp(1.35rem,2.2vw,1.7rem);line-height:1.3;margin:0}
  .section-head p{margin:6px 0 0;font-size:13px;color:var(--ink-soft)}
  .rel-list{display:flex;flex-direction:column;gap:16px}
  .rel-item{
    display:flex;gap:18px;align-items:center;background:var(--surface);
    border:1px solid var(--line);border-radius:16px;padding:16px;box-shadow:var(--shadow-sm);
    transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  }
  .rel-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(14,111,104,.35)}
  .rel-item .thumb{width:96px;height:96px;flex:none;border-radius:14px;overflow:hidden;background:var(--primary-tint)}
  .rel-item .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
  .rel-item:hover .thumb img{transform:scale(1.04)}
  .rel-item .txt{min-width:0}
  .rel-item h3{
    font-size:1rem;font-weight:600;line-height:1.5;margin:0 0 8px;color:var(--ink);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .rel-item .meta{font-size:12.5px;color:var(--ink-soft);display:flex;gap:8px;align-items:center;font-variant-numeric:tabular-nums}

  .back-row{margin:40px 0 8px}

  /* ---------- 页脚 ---------- */
  .site-foot{background:var(--ink-deep);margin-top:72px;padding:56px 0 26px;color:rgba(255,255,255,.72)}
  .foot-grid{display:grid;grid-template-columns:1fr;gap:30px}
  @media (min-width:640px){.foot-grid{grid-template-columns:1fr 1fr;gap:32px}}
  @media (min-width:1024px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
  .foot-brand-cn{font-size:16px;font-weight:600;color:#fff;letter-spacing:.02em}
  .foot-brand-en{font-size:11px;letter-spacing:.16em;color:var(--primary-tint);margin-top:6px}
  .foot-desc{font-size:13px;line-height:1.8;margin:14px 0 0;max-width:26em;border-top:1px solid rgba(220,239,234,.22);padding-top:14px}
  .foot-title{font-size:12px;letter-spacing:.1em;color:#fff;margin-bottom:14px}
  .foot-links{display:flex;flex-direction:column;gap:10px}
  .foot-links a,.foot-links span{font-size:13px;color:rgba(255,255,255,.72);transition:color .2s ease}
  .foot-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
  .foot-bottom{
    margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
    display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
    font-size:12px;color:rgba(255,255,255,.5);
  }

  @keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
  .fade-1{animation:rise .5s ease-out both}
  .fade-2{animation:rise .5s ease-out .06s both}
  .fade-3{animation:rise .5s ease-out .12s both}
  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
    html{scroll-behavior:auto}
    .pn-card:hover,.rel-item:hover,.btn-primary:hover,.side-cta:hover{transform:none}
    .rel-item:hover .thumb img{transform:none}
  }

/* roulang page: category1 */
:root{
  --paper:#F7F4EF;
  --surface:#FFFFFF;
  --ink:#0E1B1A;
  --ink-deep:#0B2321;
  --ink-soft:#4A5A58;
  --line:#E4DED4;
  --primary:#0E6F68;
  --primary-deep:#084C48;
  --primary-tint:#DCEFEA;
  --accent:#FF6F3C;
  --accent-strong:#E85F2E;
  --accent-tint:#FFE7DC;
  --danger:#C9452F;
  --shadow-sm:0 1px 2px rgba(14,27,26,.05);
  --shadow-md:0 12px 30px -14px rgba(14,27,26,.20);
  --shadow-lg:0 24px 60px -24px rgba(14,27,26,.28);
  --font-sans:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sidebar-w:248px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;overflow-x:hidden;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden;}
img,svg{display:block;}
img{max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-family:var(--font-serif);font-weight:700;}
p{margin:0;}
ol,ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}

/* ---------- layout ---------- */
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media(min-width:768px){.wrap{padding:0 32px;}}
@media(min-width:1280px){.wrap{padding:0 48px;}}

.app-main{width:100%;}
@media(min-width:1024px){.app-main{padding-left:var(--sidebar-w);}}

/* ---------- sidebar / topbar ---------- */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  display:flex;
  flex-direction:column;
  padding:20px 14px 18px;
  background:var(--ink-deep);
  border-right:1px solid rgba(255,255,255,.08);
  overflow-y:auto;
  z-index:80;
}
.side-brand{
  display:flex;align-items:center;gap:10px;
  padding:4px 8px 16px;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.brand-mark{
  width:30px;height:30px;flex:none;border-radius:9px;
  background:var(--accent);
  display:grid;place-items:center;
}
.brand-mark svg{width:18px;height:18px;fill:none;stroke:#fff;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.brand-text strong{display:block;font-size:15px;font-weight:600;color:#fff;line-height:1.3;font-family:var(--font-sans);}
.brand-text em{display:block;font-style:normal;font-size:11px;letter-spacing:.12em;color:rgba(255,255,255,.5);line-height:1.5;}
.side-label{
  margin:18px 8px 8px;
  font-size:11px;letter-spacing:.14em;
  color:rgba(255,255,255,.4);
}
.side-nav{display:flex;flex-direction:column;gap:2px;}
.nav-link{
  position:relative;
  display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;
  border-radius:10px;
  font-size:14px;
  color:rgba(255,255,255,.72);
  transition:color .18s ease,background-color .18s ease;
}
.nav-link svg{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.06);}
.nav-link[aria-current="page"]{color:#fff;background:rgba(255,255,255,.08);}
.nav-link[aria-current="page"]::before{
  content:"";position:absolute;left:0;top:11px;
  width:3px;height:22px;border-radius:999px;background:var(--accent);
}
.side-foot{margin-top:auto;padding-top:18px;}
.side-cta{
  display:flex;align-items:center;justify-content:center;gap:6px;
  height:44px;border-radius:999px;
  background:var(--accent);color:#fff;
  font-size:14px;font-weight:600;
  transition:background-color .18s ease,box-shadow .18s ease;
}
.side-cta svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s ease;}
.side-cta:hover{background:var(--accent-strong);box-shadow:var(--shadow-md);}
.side-cta:hover svg{transform:translateX(3px);}
.side-note{margin-top:12px;font-size:11px;line-height:1.6;text-align:center;color:rgba(255,255,255,.4);}

.topbar{display:none;}
.burger{display:none;}
.drawer-mask{display:none;}

@media(max-width:1023px){
  .topbar{
    position:sticky;top:0;z-index:70;
    display:flex;align-items:center;justify-content:space-between;
    height:60px;padding:0 18px;
    background:var(--ink-deep);
  }
  .topbar-brand{font-size:15px;font-weight:600;color:#fff;letter-spacing:.02em;}
  .burger{
    position:relative;width:44px;height:44px;
    display:grid;place-items:center;
  }
  .burger span{
    position:absolute;left:11px;width:22px;height:2px;border-radius:2px;background:#fff;
    transition:transform .24s cubic-bezier(.22,.8,.3,1);
  }
  .burger span:nth-child(1){transform:translateY(-5px);}
  .burger span:nth-child(2){transform:translateY(5px);}
  .burger[aria-expanded="true"] span:nth-child(1){transform:rotate(45deg);}
  .burger[aria-expanded="true"] span:nth-child(2){transform:rotate(-45deg);}
  .sidebar{
    width:min(280px,82vw);
    transform:translateX(-100%);
    transition:transform .24s cubic-bezier(.22,.8,.3,1);
    box-shadow:var(--shadow-lg);
  }
  .sidebar.open{transform:translateX(0);}
  .drawer-mask{
    display:block;
    position:fixed;inset:0;z-index:75;
    background:rgba(11,35,33,.5);
    opacity:0;pointer-events:none;
    transition:opacity .24s ease;
  }
  .drawer-mask.show{opacity:1;pointer-events:auto;}
}

/* ---------- breadcrumb ---------- */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-soft);letter-spacing:.02em;
}
.crumb a{transition:color .18s ease;}
.crumb a:hover{color:var(--primary);}
.crumb .sep{color:rgba(74,90,88,.5);}
.crumb strong{font-weight:400;color:var(--ink);}

/* ---------- hero ---------- */
.hero{padding:26px 0 36px;border-bottom:1px solid var(--line);}
@media(min-width:1024px){.hero{padding:34px 0 46px;}}
.eyebrow{
  margin-top:22px;
  font-size:.75rem;font-weight:600;letter-spacing:.08em;
  color:var(--primary);
}
.hero h1{
  margin-top:14px;
  font-size:clamp(1.9rem,3.2vw,2.9rem);
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.01em;
  max-width:20em;
}
.hero .lede{
  margin-top:14px;
  font-size:1rem;line-height:1.85;
  color:var(--ink-soft);
  max-width:40em;
}
.pillbar{
  display:flex;gap:10px;
  margin-top:28px;padding-bottom:4px;
  overflow-x:auto;
  scrollbar-width:none;
}
.pillbar::-webkit-scrollbar{display:none;}
.pill{
  display:inline-flex;align-items:center;flex:none;
  height:40px;padding:0 18px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--surface);
  font-size:13.5px;
  color:var(--ink-soft);
  white-space:nowrap;
  transition:color .18s ease,border-color .18s ease,background-color .18s ease,box-shadow .18s ease;
}
.pill:hover{color:var(--primary);border-color:var(--primary);}
.pill.is-current{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600;}

/* ---------- sections ---------- */
.sec{padding:56px 0;}
@media(min-width:768px){.sec{padding:72px 0;}}
@media(min-width:1280px){.sec{padding:88px 0;}}
.sec-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{max-width:760px;margin-bottom:36px;}
.sec-head h2{font-size:clamp(1.6rem,2.6vw,2.35rem);line-height:1.3;font-weight:600;}
.sec-head p{margin-top:10px;font-size:.9375rem;color:var(--ink-soft);max-width:38em;}

/* ---------- numbered list ---------- */
.numlist{border-top:1px solid var(--line);}
.numlist li{
  display:grid;
  grid-template-columns:56px 1fr;
  gap:18px;
  padding:22px 0;
  border-bottom:1px solid var(--line);
}
.numlist .num{
  font-family:var(--font-serif);
  font-size:1.5rem;font-weight:700;line-height:1.2;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
}
.numlist h3{
  font-family:var(--font-sans);
  font-size:1.0625rem;font-weight:600;line-height:1.5;
}
.numlist p{
  margin-top:6px;
  font-size:.9375rem;line-height:1.85;
  color:var(--ink-soft);
  max-width:50em;
}
@media(max-width:520px){
  .numlist li{grid-template-columns:40px 1fr;gap:12px;padding:20px 0;}
  .numlist .num{font-size:1.25rem;}
}

/* ---------- notice ---------- */
.notice{
  margin-top:40px;
  max-width:58em;
  padding:20px 24px;
  border-left:3px solid var(--accent);
  border-radius:12px;
  background:var(--primary-tint);
  font-size:.9375rem;
  line-height:1.85;
  color:var(--ink);
}

/* ---------- split / steps ---------- */
.split{display:grid;gap:36px;}
@media(min-width:1024px){
  .split{grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
}
.media{
  border-radius:20px;
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--primary-tint);
  box-shadow:var(--shadow-md);
}
.media img{width:100%;aspect-ratio:4/3;object-fit:cover;}

.steplist{margin-top:28px;}
.steplist li{
  display:grid;
  grid-template-columns:34px 1fr;
  gap:16px;
  padding:18px 0;
  border-top:1px solid var(--line);
}
.steplist li:last-child{border-bottom:1px solid var(--line);}
.step-no{
  width:28px;height:28px;
  display:grid;place-items:center;
  border-radius:999px;
  background:var(--accent-tint);
  color:var(--accent-strong);
  font-family:var(--font-serif);
  font-size:13px;font-weight:700;
  font-variant-numeric:tabular-nums;
}
.steplist h3{font-family:var(--font-sans);font-size:1rem;font-weight:600;line-height:1.5;}
.steplist p{margin-top:4px;font-size:.9375rem;line-height:1.8;color:var(--ink-soft);}

/* ---------- scenario cards ---------- */
.scen-grid{display:grid;gap:20px;grid-template-columns:1fr;}
@media(min-width:768px){.scen-grid{grid-template-columns:1.4fr 1fr 1fr;}}
.scen-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:20px;
  padding:28px 24px;
  box-shadow:var(--shadow-sm);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.scen-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-md);
  border-color:rgba(14,111,104,.35);
}
.scen-icon{
  width:40px;height:40px;
  display:grid;place-items:center;
  border-radius:12px;
  background:var(--primary-tint);
  color:var(--primary);
  margin-bottom:16px;
}
.scen-icon svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.scen-card h3{font-family:var(--font-sans);font-size:1.0625rem;font-weight:600;line-height:1.5;}
.scen-card p{margin-top:10px;font-size:.9375rem;line-height:1.8;color:var(--ink-soft);}

/* ---------- faq ---------- */
.faq{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:16px;
  overflow:hidden;
}
.faq details{border-bottom:1px solid var(--line);}
.faq details:last-child{border-bottom:0;}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:60px;
  padding:16px 24px;
  cursor:pointer;
  list-style:none;
  font-size:1rem;
  font-weight:600;
  font-family:var(--font-sans);
  transition:color .18s ease;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--primary);}
.faq .plus{position:relative;width:16px;height:16px;flex:none;}
.faq .plus::before,
.faq .plus::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--ink-soft);border-radius:2px;
  transition:transform .22s ease,background-color .22s ease;
}
.faq .plus::before{width:14px;height:1.5px;transform:translate(-50%,-50%);}
.faq .plus::after{width:1.5px;height:14px;transform:translate(-50%,-50%);}
.faq details[open] .plus::before{background:var(--accent);}
.faq details[open] .plus::after{transform:translate(-50%,-50%) rotate(90deg);background:var(--accent);}
.faq .ans{
  padding:0 24px 20px;
  font-size:.9375rem;
  line-height:1.85;
  color:var(--ink-soft);
  max-width:52em;
}

/* ---------- related cards ---------- */
.rel-grid{display:grid;gap:20px;grid-template-columns:1fr;}
@media(min-width:768px){.rel-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}
.rel-card{
  display:block;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:20px;
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.rel-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-md);
  border-color:rgba(14,111,104,.35);
}
.rel-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--primary-tint);}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.rel-card:hover .rel-thumb img{transform:scale(1.03);}
.rel-body{padding:22px 24px 24px;}
.rel-tag{
  display:inline-block;
  padding:4px 10px;
  border-radius:999px;
  background:var(--primary-tint);
  color:var(--primary);
  font-size:12px;
  line-height:1.5;
  letter-spacing:.04em;
}
.rel-body h3{
  margin-top:14px;
  font-family:var(--font-sans);
  font-size:1.0625rem;font-weight:600;line-height:1.5;
}
.rel-body p{margin-top:8px;font-size:.875rem;line-height:1.8;color:var(--ink-soft);}
.rel-meta{margin-top:14px;font-size:.8125rem;color:var(--ink-soft);letter-spacing:.04em;}

/* ---------- buttons ---------- */
.btn-main{
  display:inline-flex;align-items:center;gap:8px;
  height:48px;padding:0 26px;
  border-radius:999px;
  background:var(--accent);
  color:#fff;
  font-size:15px;font-weight:600;
  transition:background-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-main svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s ease;}
.btn-main:hover{background:var(--accent-strong);transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn-main:hover svg{transform:translateX(3px);}
.btn-main:active{transform:translateY(0) scale(.99);}

.btn-ghost{
  display:inline-flex;align-items:center;
  height:48px;padding:0 24px;
  border-radius:999px;
  border:1px solid var(--primary);
  background:var(--surface);
  color:var(--primary);
  font-size:15px;font-weight:600;
  transition:background-color .2s ease,border-color .2s ease,color .2s ease;
}
.btn-ghost:hover{background:var(--primary-tint);border-color:var(--primary-deep);color:var(--primary-deep);}

.txt-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:.9375rem;
  color:var(--primary);
  background-image:linear-gradient(currentColor,currentColor);
  background-repeat:no-repeat;
  background-position:0 100%;
  background-size:0 1px;
  transition:background-size .22s ease,color .2s ease;
}
.txt-link:hover{background-size:100% 1px;color:var(--primary-deep);}

/* ---------- cta ---------- */
.cta{background:var(--ink-deep);color:#fff;padding:56px 0;}
@media(min-width:768px){.cta{padding:72px 0;}}
.cta-box{display:grid;gap:36px;}
@media(min-width:1024px){.cta-box{grid-template-columns:1.15fr .85fr;gap:64px;align-items:center;}}
.cta h2{color:#fff;font-size:clamp(1.6rem,2.6vw,2.35rem);font-weight:600;line-height:1.3;}
.cta p{margin-top:12px;font-size:.9375rem;line-height:1.85;color:rgba(255,255,255,.72);max-width:34em;}
.cta-btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.cta .btn-ghost{background:transparent;border-color:rgba(255,255,255,.35);color:#fff;}
.cta .btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff;}
.cta-art{
  border-radius:20px;
  overflow:hidden;
  border:1px solid rgba(255,255,255,.14);
  background:rgba(255,255,255,.04);
}
.cta-art img{width:100%;aspect-ratio:16/10;object-fit:cover;}

/* ---------- footer ---------- */
.site-foot{background:var(--ink-deep);color:rgba(255,255,255,.72);padding:56px 0 28px;}
.foot-grid{display:grid;gap:32px;}
@media(min-width:768px){.foot-grid{grid-template-columns:1fr 1fr;}}
@media(min-width:1024px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}}
.foot-brand-cn{font-family:var(--font-serif);font-size:1.125rem;font-weight:700;color:#fff;}
.foot-brand-en{margin-top:6px;font-size:11px;letter-spacing:.16em;color:rgba(255,255,255,.4);}
.foot-desc{
  margin-top:14px;padding-top:14px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;line-height:1.8;
  max-width:26em;
}
.foot-title{margin-bottom:14px;font-size:13px;font-weight:600;color:#fff;letter-spacing:.04em;}
.foot-links{display:flex;flex-direction:column;gap:10px;}
.foot-links a{
  width:fit-content;
  font-size:13px;
  color:rgba(255,255,255,.72);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.foot-links a:hover{color:#fff;border-bottom-color:rgba(255,255,255,.5);}
.foot-bottom{
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
  margin-top:40px;padding-top:18px;
  border-top:1px solid rgba(255,255,255,.1);
  font-size:12px;color:rgba(255,255,255,.45);
}

/* ---------- motion ---------- */
@keyframes rise{
  from{opacity:0;transform:translateY(12px);}
  to{opacity:1;transform:translateY(0);}
}
.rise{animation:rise .4s ease-out both;}
.rise-1{animation-delay:.06s;}
.rise-2{animation-delay:.12s;}
.rise-3{animation-delay:.18s;}
.rise-4{animation-delay:.24s;}

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

/* roulang page: category2 */
:root{
  --paper:#F7F4EF;
  --surface:#FFFFFF;
  --ink:#0E1B1A;
  --ink-deep:#0B2321;
  --ink-soft:#4A5A58;
  --line:#E4DED4;
  --primary:#0E6F68;
  --primary-deep:#084C48;
  --primary-tint:#DCEFEA;
  --accent:#FF6F3C;
  --accent-tint:#FFE7DC;
  --danger:#C9452F;
  --shadow-sm:0 1px 2px rgba(14,27,26,.05);
  --shadow-md:0 12px 30px -14px rgba(14,27,26,.20);
  --shadow-lg:0 24px 60px -24px rgba(14,27,26,.28);
  --radius-lg:20px;
  --radius-md:16px;
  --radius-sm:12px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit}
h1,h2,h3,h4,p,figure,ul,ol{margin:0}
h1,h2,.serif{font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",serif}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}

.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
@media(min-width:768px){.wrap{padding:0 32px}}
@media(min-width:1280px){.wrap{padding:0 48px}}

/* ---------- App Shell 侧栏 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:248px;
  background:var(--ink-deep);color:#fff;
  display:flex;flex-direction:column;
  z-index:60;
  border-right:1px solid rgba(255,255,255,.08);
}
.brand{display:flex;align-items:center;gap:10px;padding:22px 20px;border-bottom:1px solid rgba(255,255,255,.08)}
.brand-mark{width:20px;height:20px;flex:0 0 20px;color:var(--accent)}
.brand-mark svg{width:100%;height:100%;fill:currentColor}
.brand-cn{display:block;font-size:15px;font-weight:600;line-height:1.3;color:#fff}
.brand-sub{display:block;font-size:11px;letter-spacing:.12em;color:rgba(255,255,255,.55);line-height:1.5}
.side-scroll{flex:1 1 auto;overflow-y:auto;padding:16px 14px 8px}
.nav-group-title{font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.4);padding:14px 10px 8px}
.side-nav{display:flex;flex-direction:column;gap:4px}
.nav-link{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;border-radius:10px;
  font-size:14px;color:rgba(255,255,255,.72);
  transition:background .2s ease,color .2s ease;
}
.nav-link svg{width:18px;height:18px;flex:0 0 18px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.nav-link:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-link[aria-current="page"]{background:rgba(255,255,255,.08);color:#fff}
.nav-link[aria-current="page"]::before{
  content:"";position:absolute;left:2px;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:999px;background:var(--accent);
}
.side-foot{padding:16px;border-top:1px solid rgba(255,255,255,.08)}
.side-note{margin:10px 0 0;font-size:10.5px;line-height:1.6;color:rgba(255,255,255,.45)}

/* ---------- 主内容 ---------- */
.main{margin-left:248px;min-height:100vh;display:flex;flex-direction:column}

/* ---------- 移动端顶栏与抽屉 ---------- */
.topbar{display:none}
.mask{position:fixed;inset:0;background:rgba(11,35,33,.5);opacity:0;pointer-events:none;transition:opacity .24s ease;z-index:55}
.mask.is-open{opacity:1;pointer-events:auto}
@media(min-width:1024px){.mask{display:none}}
@media(max-width:1023px){
  .sidebar{transform:translateX(-100%);transition:transform .24s cubic-bezier(.22,.8,.3,1)}
  .sidebar.is-open{transform:translateX(0)}
  .main{margin-left:0}
  .topbar{
    display:flex;align-items:center;justify-content:space-between;
    height:60px;padding:0 18px;background:var(--ink-deep);
    position:sticky;top:0;z-index:70;
  }
  .topbar-brand{display:flex;align-items:center;gap:9px;color:#fff;font-size:15px;font-weight:600}
  .topbar-mark{width:18px;height:18px;color:var(--accent)}
  .topbar-mark svg{width:100%;height:100%;fill:currentColor}
  .hamburger{
    width:44px;height:44px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:6px;
    background:none;border:0;cursor:pointer;
  }
  .hamburger span{display:block;width:22px;height:2px;background:#fff;border-radius:2px;transition:transform .2s ease}
  .hamburger.is-x span:first-child{transform:translateY(4px) rotate(45deg)}
  .hamburger.is-x span:last-child{transform:translateY(-4px) rotate(-45deg)}
}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:background .22s ease,color .22s ease,transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#E85F2E;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:translateY(0) scale(.99)}
.btn-ghost{background:#fff;border-color:var(--primary);color:var(--primary)}
.btn-ghost:hover{background:var(--primary-tint);border-color:var(--primary-deep)}
.btn-block{width:100%}
.btn .arw{width:16px;height:16px;transition:transform .22s ease}
.btn:hover .arw{transform:translateX(3px)}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary);
  background-image:linear-gradient(currentColor,currentColor);background-repeat:no-repeat;background-size:0% 1px;background-position:0 100%;
  transition:background-size .24s ease,color .2s ease;
}
.link-more:hover{background-size:100% 1px;color:var(--primary-deep)}
.eyebrow{font-size:.75rem;letter-spacing:.14em;color:var(--primary);font-weight:600;text-transform:uppercase}
.eyebrow.accent{color:var(--accent)}
.sec-title{font-size:clamp(1.6rem,2.6vw,2.35rem);font-weight:600;line-height:1.3;letter-spacing:-.01em}
.sec-sub{margin-top:10px;font-size:15px;color:var(--ink-soft)}
.chip{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:999px;background:var(--primary-tint);color:var(--primary);font-size:12px;font-weight:600;letter-spacing:.02em}
.chip-accent{background:var(--accent-tint);color:#B8431C}

/* ---------- Hero ---------- */
.cat-hero{padding:44px 0 8px;background:var(--paper)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.crumb{font-size:13px;color:var(--ink-soft);margin-bottom:20px}
.crumb a:hover{color:var(--primary)}
.crumb span.sep{margin:0 8px;color:#BEB6A9}
.crumb strong{font-weight:600;color:var(--ink)}
.cat-hero h1{font-size:clamp(1.9rem,3.2vw,2.9rem);font-weight:700;line-height:1.25;letter-spacing:-.015em;margin-top:14px}
.lede{margin-top:18px;font-size:16.5px;color:var(--ink-soft);max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-points{margin-top:22px;font-size:13px;color:var(--ink-soft);display:flex;flex-wrap:wrap;gap:8px 14px}
.hero-points span{display:inline-flex;align-items:center;gap:8px}
.hero-points span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent)}
.hero-fig{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md)}
.hero-fig img{width:100%;aspect-ratio:4/5;object-fit:cover}
.hero-fig figcaption{
  position:absolute;left:16px;bottom:16px;
  background:rgba(11,35,33,.86);color:#fff;font-size:12.5px;line-height:1.6;
  padding:8px 14px;border-radius:999px;
}
.cat-tabs{display:flex;gap:10px;overflow-x:auto;padding:6px 0 4px;margin-top:34px;scrollbar-width:none}
.cat-tabs::-webkit-scrollbar{display:none}
.cat-tab{
  flex:0 0 auto;display:inline-flex;align-items:center;height:42px;padding:0 18px;
  border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:13.5px;color:var(--ink-soft);white-space:nowrap;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.cat-tab:hover{border-color:var(--primary);color:var(--primary)}
.cat-tab.is-active{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}

/* ---------- 板块 ---------- */
.section{padding:64px 0}
@media(min-width:768px){.section{padding:88px 0}}
@media(min-width:1280px){.section{padding:104px 0}}
.sec-head{max-width:760px;margin-bottom:40px}

/* 提示条 */
.notice{
  background:var(--primary-tint);border-left:3px solid var(--accent);
  border-radius:0 var(--radius-md) var(--radius-md) 0;
  padding:22px 26px;font-size:15px;line-height:1.85;color:var(--ink);
  max-width:900px;
}
.notice strong{font-weight:600;color:var(--primary-deep)}

/* 时间线 */
.timeline{position:relative;max-width:1000px}
.timeline::before{content:"";position:absolute;left:199px;top:14px;bottom:14px;width:1px;background:var(--line)}
.tl-item{
  position:relative;display:grid;grid-template-columns:200px 1fr;gap:48px;
  padding:26px 0;
}
.tl-item + .tl-item{border-top:1px solid var(--line)}
.tl-item::after{
  content:"";position:absolute;left:194px;top:36px;width:11px;height:11px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 0 4px var(--paper);
}
.tl-meta{text-align:right;padding-right:2px}
.tl-step{display:block;font-family:"Noto Serif SC","Songti SC",serif;font-size:26px;font-weight:700;line-height:1;color:var(--accent);font-variant-numeric:tabular-nums}
.tl-tag{display:inline-block;margin-top:10px;font-size:12px;letter-spacing:.06em;color:var(--ink-soft)}
.tl-body h3{font-size:1.15rem;font-weight:600;line-height:1.5;font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
.tl-body p{margin-top:10px;font-size:15px;color:var(--ink-soft);line-height:1.85}
@media(max-width:767px){
  .timeline::before{left:9px}
  .tl-item{grid-template-columns:1fr;gap:12px;padding-left:40px}
  .tl-item::after{left:4px;top:32px}
  .tl-meta{display:flex;align-items:baseline;gap:12px;text-align:left}
  .tl-step{font-size:22px}
  .tl-tag{margin-top:0}
}

/* 场景卡 */
.scene-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:24px}
.scene-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  display:flex;flex-direction:column;
}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(14,111,104,.35)}
.scene-card img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s ease}
.scene-card:hover img{transform:scale(1.03)}
.scene-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto}
.scene-body h3{font-size:1.0625rem;font-weight:600;line-height:1.5}
.scene-body p{margin-top:12px;font-size:14.5px;color:var(--ink-soft);line-height:1.85}
@media(max-width:1023px){.scene-grid{grid-template-columns:1fr 1fr}}
@media(max-width:639px){.scene-grid{grid-template-columns:1fr}}

/* 深色条带 */
.band{position:relative;background:var(--ink-deep);color:#fff;padding:72px 0;overflow:hidden}
.band::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;opacity:.16}
.band .wrap{position:relative;z-index:1}
.band h2{color:#fff;font-size:clamp(1.6rem,2.6vw,2.2rem);font-weight:600;line-height:1.3}
.band-sub{margin-top:10px;font-size:14.5px;color:rgba(255,255,255,.66)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;margin-top:44px}
.step{}
.step-num{font-family:"Noto Serif SC","Songti SC",serif;font-size:30px;font-weight:700;color:var(--accent);line-height:1;font-variant-numeric:tabular-nums}
.step h3{margin-top:14px;font-size:1rem;font-weight:600;color:#fff;line-height:1.55;font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
.step p{margin-top:8px;font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.66)}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);margin-top:56px;padding-top:32px;border-top:1px solid rgba(255,255,255,.12)}
.metric{padding:0 24px;border-left:1px solid rgba(255,255,255,.12)}
.metric:first-child{border-left:0;padding-left:0}
.metric-num{font-family:"Noto Serif SC","Songti SC",serif;font-size:clamp(2.2rem,3vw,3rem);font-weight:700;color:var(--accent);line-height:1;font-variant-numeric:tabular-nums}
.metric-num small{font-size:.45em;font-weight:600;margin-left:4px;color:rgba(255,255,255,.8)}
.metric p{margin-top:10px;font-size:13px;color:rgba(255,255,255,.7);line-height:1.7}
@media(max-width:1023px){
  .steps{grid-template-columns:1fr 1fr;gap:28px}
  .metrics{grid-template-columns:1fr 1fr;gap:28px 0}
  .metric:nth-child(odd){border-left:0;padding-left:0}
}
@media(max-width:519px){
  .steps{grid-template-columns:1fr}
  .metrics{grid-template-columns:1fr;gap:24px 0}
  .metric{border-left:0;padding-left:0}
}

/* FAQ */
.faq-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;max-width:900px}
.faq-item + .faq-item{border-top:1px solid var(--line)}
.faq-q{
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:60px;padding:16px 24px;cursor:pointer;font-size:16px;font-weight:600;line-height:1.6;
}
.faq-q::-webkit-details-marker{display:none}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 16px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ink-soft);border-radius:2px;transition:transform .22s ease,background .22s ease}
.faq-icon::before{left:0;top:7px;width:16px;height:1.5px}
.faq-icon::after{left:7px;top:0;width:1.5px;height:16px}
details[open] .faq-icon::before{background:var(--accent)}
details[open] .faq-icon::after{transform:rotate(90deg);background:var(--accent)}
.faq-a{padding:0 24px 20px;font-size:15px;line-height:1.85;color:var(--ink-soft)}

/* 相关卡 */
.rel-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:24px}
.rel-card{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:20px;box-shadow:var(--shadow-sm);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(14,111,104,.35)}
.rel-thumb{flex:0 0 72px;width:72px;height:72px;border-radius:14px;overflow:hidden;background:var(--primary-tint)}
.rel-thumb img{width:100%;height:100%;object-fit:cover}
.rel-card h3{font-size:.98rem;font-weight:600;line-height:1.55}
.rel-card p{margin-top:8px;font-size:13px;color:var(--ink-soft);line-height:1.75}
.rel-meta{margin-top:10px;font-size:12px;color:var(--ink-soft);letter-spacing:.04em}
@media(max-width:1023px){.rel-grid{grid-template-columns:1fr 1fr}}
@media(max-width:639px){.rel-grid{grid-template-columns:1fr}}

/* CTA */
.cta-sec{background:var(--primary-tint);padding:72px 0}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.cta-sec h2{font-size:clamp(1.5rem,2.4vw,2.1rem);font-weight:600;line-height:1.35;margin-top:14px}
.cta-sec p{margin-top:14px;font-size:15.5px;color:var(--ink-soft);max-width:32em}
.cta-fig{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md)}
.cta-fig img{width:100%;aspect-ratio:16/10;object-fit:cover}
@media(max-width:1023px){.cta-grid{grid-template-columns:1fr;gap:32px}}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--ink-deep);color:#fff;padding:56px 0 24px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.foot-brand-cn{font-size:17px;font-weight:600;color:#fff}
.foot-brand-en{margin-top:4px;font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.45)}
.foot-desc{margin-top:16px;padding-top:16px;border-top:1px solid rgba(255,255,255,.14);font-size:13px;line-height:1.8;color:rgba(255,255,255,.66)}
.foot-title{font-size:13px;font-weight:600;margin-bottom:14px;color:#fff}
.foot-links{display:flex;flex-direction:column;gap:10px}
.foot-links a{font-size:13px;color:rgba(255,255,255,.7);transition:color .2s ease}
.foot-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.foot-bottom{
  margin-top:40px;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12px;color:rgba(255,255,255,.5);
}
@media(max-width:1023px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:639px){.foot-grid{grid-template-columns:1fr}}

/* ---------- 动效 ---------- */
@keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.anim{animation:rise .4s ease-out both}
.d1{animation-delay:.06s}
.d2{animation-delay:.12s}
.d3{animation-delay:.18s}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .btn:hover,.scene-card:hover,.rel-card:hover{transform:none}
  .scene-card:hover img{transform:none}
}
@media(max-width:1023px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .cat-hero{padding-top:32px}
}

/* roulang page: category3 */
:root{
  --paper:#F7F4EF;
  --surface:#FFFFFF;
  --ink:#0E1B1A;
  --ink-deep:#0B2321;
  --ink-soft:#4A5A58;
  --line:#E4DED4;
  --primary:#0E6F68;
  --primary-deep:#084C48;
  --primary-tint:#DCEFEA;
  --accent:#FF6F3C;
  --accent-tint:#FFE7DC;
  --danger:#C9452F;
  --shadow-sm:0 1px 2px rgba(14,27,26,.05);
  --shadow-md:0 12px 30px -14px rgba(14,27,26,.20);
  --shadow-lg:0 24px 60px -24px rgba(14,27,26,.28);
  --font-sans:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;border-radius:0 0 12px 0;z-index:200}
.skip:focus{left:0}

/* ---------- 容器 ---------- */
.container,.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media(min-width:768px){.container,.wrap{padding:0 32px}}
@media(min-width:1280px){.container,.wrap{padding:0 48px}}

/* ---------- App Shell 布局 ---------- */
.shell-main{min-height:100vh}
@media(min-width:1024px){.shell-main{padding-left:248px}}

/* ---------- 侧边导航 ---------- */
.sidebar{
  position:fixed;top:0;left:0;width:248px;height:100vh;
  background:var(--ink-deep);
  border-right:1px solid rgba(255,255,255,.08);
  display:none;flex-direction:column;
  padding:24px 16px;overflow-y:auto;z-index:50;
}
@media(min-width:1024px){.sidebar{display:flex}}
.brand{display:flex;align-items:center;gap:12px;padding:4px 8px 16px}
.brand-mark{width:20px;height:20px;border-radius:6px;background:var(--accent);flex:0 0 auto}
.brand-cn{display:block;font-size:15px;font-weight:600;color:#fff;line-height:1.25}
.brand-sub{display:block;font-size:11px;letter-spacing:.12em;color:rgba(255,255,255,.55);line-height:1.4}
.side-divider{height:1px;background:rgba(255,255,255,.1);margin:0 8px 18px}
.nav-label{font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.4);padding:0 12px;margin-bottom:10px}
.side-nav{display:flex;flex-direction:column;gap:2px}
.nav-link{
  position:relative;display:flex;align-items:center;gap:12px;height:44px;
  padding:0 12px;border-radius:10px;font-size:14px;
  color:rgba(255,255,255,.72);
  transition:background .2s ease,color .2s ease;
}
.nav-link svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;flex:0 0 auto;opacity:.9}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.06)}
.nav-link[aria-current="page"]{color:#fff;background:rgba(255,255,255,.08)}
.nav-link[aria-current="page"]::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:999px;background:var(--accent);
}
.side-foot{margin-top:auto;padding:24px 8px 4px}
.side-cta{width:100%;justify-content:center}
.side-note{margin:14px 0 0;font-size:11px;line-height:1.7;color:rgba(255,255,255,.45)}

/* ---------- 移动端顶栏与抽屉 ---------- */
.topbar{
  position:sticky;top:0;z-index:60;height:60px;
  background:var(--ink-deep);display:flex;align-items:center;justify-content:space-between;
  padding:0 18px;
}
@media(min-width:1024px){.topbar{display:none}}
.topbar-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:15px;font-weight:600}
.topbar-brand .brand-mark{width:18px;height:18px}
.burger{
  width:44px;height:44px;display:inline-flex;flex-direction:column;
  align-items:center;justify-content:center;gap:6px;
  background:transparent;border:0;cursor:pointer;
}
.burger span{display:block;width:24px;height:1.5px;background:#fff;transition:transform .24s ease,opacity .24s ease}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(3.75px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){transform:translateY(-3.75px) rotate(-45deg)}
.scrim{
  position:fixed;inset:0;background:rgba(11,35,33,.5);
  opacity:0;visibility:hidden;transition:opacity .24s ease;z-index:70;
}
.scrim.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:min(280px,82vw);
  background:var(--ink-deep);z-index:80;padding:24px 16px;overflow-y:auto;
  transform:translateX(-100%);
  transition:transform .24s cubic-bezier(.22,.8,.3,1);
  display:flex;flex-direction:column;
}
.drawer.open{transform:none}
body.locked{overflow:hidden}

/* ---------- 按钮 ---------- */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 26px;border-radius:999px;
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;
  border:0;cursor:pointer;
  transition:background .25s ease,transform .25s ease,box-shadow .25s ease;
}
.btn-primary svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .25s ease}
.btn-primary:hover{background:#E85F2E;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-primary:hover svg{transform:translateX(3px)}
.btn-primary:active{transform:translateY(0) scale(.99)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:999px;
  background:#fff;border:1px solid var(--primary);color:var(--primary);
  font-size:15px;font-weight:600;transition:background .25s ease,border-color .25s ease;
}
.btn-ghost:hover{background:var(--primary-tint);border-color:var(--primary-deep)}
.btn-ghost-light{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:999px;
  background:transparent;border:1px solid rgba(255,255,255,.42);color:#fff;
  font-size:15px;font-weight:600;transition:background .25s ease,border-color .25s ease;
}
.btn-ghost-light:hover{background:rgba(255,255,255,.1);border-color:#fff}
.text-link{
  display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14px;font-weight:600;
  padding-bottom:2px;
  background-image:linear-gradient(var(--primary),var(--primary));
  background-repeat:no-repeat;background-position:0 100%;background-size:0% 1px;
  transition:background-size .25s ease;
}
.text-link:hover{background-size:100% 1px}

/* ---------- 通用排版 ---------- */
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.14em;font-weight:600;
  color:var(--primary);margin-bottom:12px;
}
.eyebrow-light{color:var(--accent)}
h1,h2,h3{font-family:var(--font-serif);letter-spacing:-.01em}
h1{
  font-size:clamp(1.9rem,3.2vw,2.9rem);line-height:1.25;font-weight:700;
  margin:0 0 18px;color:var(--ink);
}
h2{font-size:clamp(1.6rem,2.6vw,2.35rem);line-height:1.3;font-weight:600;margin:0 0 12px}
h3{font-family:var(--font-sans);font-size:1.125rem;line-height:1.5;font-weight:600;margin:0 0 8px}
.section-sub{color:var(--ink-soft);font-size:15px;margin:0 0 40px;max-width:660px}
.section{padding:64px 0}
@media(min-width:768px){.section{padding:96px 0}}
@media(min-width:1280px){.section{padding:112px 0}}

/* ---------- 面包屑 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-soft);margin-bottom:22px}
.breadcrumb a{color:var(--ink-soft);transition:color .2s ease}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{opacity:.55}
.breadcrumb .cur{color:var(--ink)}

/* ---------- 首屏 ---------- */
.page-hero{padding:32px 0 0;position:relative}
@media(min-width:768px){.page-hero{padding:48px 0 0}}
.hero-grid{display:grid;gap:36px;grid-template-columns:1fr}
@media(min-width:1024px){.hero-grid{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:start}}
.hero-lead{margin:0;font-size:16px;color:var(--ink-soft);max-width:34em;line-height:1.9}
.hero-figure img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
}
.cat-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.cat-tab{
  display:inline-flex;align-items:center;height:40px;padding:0 18px;border-radius:999px;
  border:1px solid var(--line);background:#fff;font-size:13px;color:var(--ink-soft);
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.cat-tab:hover{background:var(--primary-tint);border-color:var(--primary);color:var(--primary)}
.cat-tab.active{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}

/* ---------- 大图卡片网格 ---------- */
.faq-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:768px){.faq-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.faq-card{
  position:relative;display:block;overflow:hidden;border-radius:20px;
  aspect-ratio:4/5;background:var(--primary-tint);
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;
}
.faq-card img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.faq-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(14,111,104,.35)}
.faq-card:hover img{transform:scale(1.03)}
.faq-card-body{
  position:absolute;left:0;right:0;bottom:0;padding:28px 24px 24px;color:#fff;
  background:linear-gradient(to top,rgba(11,35,33,.94) 0%,rgba(11,35,33,.74) 58%,rgba(11,35,33,0) 100%);
}
.faq-card-body .tag{
  display:inline-block;font-size:12px;letter-spacing:.06em;padding:3px 10px;border-radius:999px;
  background:rgba(255,255,255,.16);color:#fff;margin-bottom:12px;
}
.faq-card-body h3{color:#fff;margin-bottom:6px;font-size:1.15rem;line-height:1.45}
.faq-card-body p{margin:0;font-size:13.5px;line-height:1.75;color:rgba(255,255,255,.78)}

/* ---------- 要点提示条 ---------- */
.tip{
  margin-top:40px;padding:22px 26px;background:var(--primary-tint);
  border-left:3px solid var(--accent);border-radius:0 16px 16px 0;
  font-size:15px;line-height:1.85;color:var(--ink);
}
.tip strong{color:var(--primary-deep)}

/* ---------- 深色排查顺序条带 ---------- */
.band{background:var(--ink-deep);color:#fff;padding:72px 0;margin-top:16px}
@media(min-width:768px){.band{padding:92px 0}}
.band h2{color:#fff}
.band .section-sub{color:rgba(255,255,255,.68);margin-bottom:44px}
.steps{display:grid;grid-template-columns:1fr;gap:0}
@media(min-width:640px){.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.steps{grid-template-columns:repeat(4,minmax(0,1fr))}}
.step{padding:26px 0 26px 0;border-top:1px solid rgba(255,255,255,.14)}
@media(min-width:640px){.step{padding:26px 22px}}
.step .num{display:block;font-family:var(--font-serif);font-size:34px;font-weight:700;line-height:1;color:var(--accent);margin-bottom:14px}
.step h3{color:#fff;font-size:1.02rem;margin-bottom:6px}
.step p{margin:0;font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.72)}

/* ---------- 相关内容 ---------- */
.related{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.related{grid-template-columns:repeat(3,minmax(0,1fr))}}
.related-card{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:16px;
  padding:26px 24px;box-shadow:var(--shadow-sm);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(14,111,104,.35)}
.related-card .tag{
  display:inline-block;font-size:12px;padding:3px 10px;border-radius:999px;
  background:var(--primary-tint);color:var(--primary);margin-bottom:14px;
}
.related-card h3{margin-bottom:8px}
.related-card p{margin:0 0 14px;font-size:13.5px;line-height:1.8;color:var(--ink-soft)}
.related-card .go{font-size:13px;font-weight:600;color:var(--primary)}

/* ---------- CTA ---------- */
.cta-panel{
  background:var(--ink-deep);border-radius:24px;padding:40px 24px;
  display:grid;gap:32px;grid-template-columns:1fr;
}
@media(min-width:768px){.cta-panel{padding:48px}}
@media(min-width:1024px){.cta-panel{grid-template-columns:minmax(0,7fr) minmax(0,5fr);align-items:center;gap:48px;padding:56px}}
.cta-title{color:#fff;margin-bottom:14px}
.cta-text{margin:0;color:rgba(255,255,255,.72);font-size:15px;line-height:1.9;max-width:32em}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.cta-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--ink-deep);color:rgba(255,255,255,.72);padding:56px 0 32px;margin-top:8px}
.foot-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:768px){.foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.foot-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:36px}}
.foot-brand-cn{font-size:15px;font-weight:600;color:#fff}
.foot-brand-en{font-size:11px;letter-spacing:.12em;color:rgba(255,255,255,.45);margin-top:4px}
.foot-desc{margin:14px 0 0;font-size:13px;line-height:1.8;color:rgba(255,255,255,.62);max-width:22em;padding-top:14px;border-top:1px solid rgba(220,239,234,.18)}
.foot-title{font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.4);margin-bottom:14px}
.foot-links{display:flex;flex-direction:column;gap:8px}
.foot-links a{font-size:13px;color:rgba(255,255,255,.72);transition:color .2s ease;width:fit-content}
.foot-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.foot-links span{font-size:13px;color:rgba(255,255,255,.6);line-height:1.7}
.foot-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  font-size:12px;color:rgba(255,255,255,.55);
}

/* ---------- 首屏入场 ---------- */
@keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.hero-copy > *{animation:rise .4s ease-out both}
.hero-copy > *:nth-child(1){animation-delay:.05s}
.hero-copy > *:nth-child(2){animation-delay:.11s}
.hero-copy > *:nth-child(3){animation-delay:.17s}
.hero-copy > *:nth-child(4){animation-delay:.23s}
.hero-copy > *:nth-child(5){animation-delay:.29s}

@media (prefers-reduced-motion: reduce){
  .hero-copy > *{animation:none}
  .faq-card,.related-card,.btn-primary,.faq-card img{transform:none!important}
  .drawer,.scrim{transition:none}
}

/* roulang page: category4 */
:root{
  --paper:#F7F4EF;
  --surface:#FFFFFF;
  --ink:#0E1B1A;
  --ink-deep:#0B2321;
  --ink-soft:#4A5A58;
  --line:#E4DED4;
  --primary:#0E6F68;
  --primary-deep:#084C48;
  --primary-tint:#DCEFEA;
  --accent:#FF6F3C;
  --accent-deep:#E85F2E;
  --accent-tint:#FFE7DC;
  --danger:#C9452F;
  --shadow-sm:0 1px 2px rgba(14,27,26,.05);
  --shadow-md:0 12px 30px -14px rgba(14,27,26,.20);
  --shadow-lg:0 24px 60px -24px rgba(14,27,26,.28);
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --sans:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",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;font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
h1,h2,h3,h4,p,dl,dd,figure{margin:0;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media(min-width:768px){.wrap{padding:0 32px;}}
@media(min-width:1280px){.wrap{padding:0 48px;}}
.serif{font-family:var(--serif);}

/* ===== 左侧 App Shell ===== */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:248px;z-index:60;
  background:var(--ink-deep);border-right:1px solid rgba(255,255,255,.08);
  display:flex;flex-direction:column;padding:22px 16px 18px;
  transform:translateX(-100%);
  transition:transform .24s cubic-bezier(.22,.8,.3,1);
  overflow-y:auto;
}
.sidebar.is-open{transform:translateX(0);}
@media(min-width:1024px){.sidebar{transform:none;}}
.brand{display:flex;align-items:center;gap:11px;padding:4px 10px 18px;border-bottom:1px solid rgba(255,255,255,.1);}
.brand-mark{width:20px;height:20px;flex:0 0 20px;color:var(--accent);}
.brand-mark svg{width:20px;height:20px;fill:currentColor;}
.brand-cn{font-size:15px;font-weight:600;color:#fff;line-height:1.25;}
.brand-sub{font-size:11px;letter-spacing:.12em;color:rgba(255,255,255,.5);line-height:1.5;}
.nav-group{font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.4);padding:20px 10px 8px;}
.side-nav{display:flex;flex-direction:column;gap:2px;}
.nav-link{
  position:relative;display:flex;align-items:center;gap:10px;height:44px;
  padding:0 12px;border-radius:10px;font-size:14px;color:rgba(255,255,255,.72);
  transition:background .2s ease,color .2s ease;
}
.nav-link svg{width:18px;height:18px;flex:0 0 18px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.06);}
.nav-link.active{color:#fff;background:rgba(255,255,255,.08);}
.nav-link.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--accent);
}
.side-foot{margin-top:auto;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);}
.side-cta{
  display:flex;align-items:center;justify-content:center;gap:8px;height:44px;border-radius:999px;
  background:var(--accent);color:#fff;font-size:14px;font-weight:600;
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.side-cta:hover{background:var(--accent-deep);transform:translateY(-1px);box-shadow:var(--shadow-md);}
.side-note{margin-top:12px;font-size:11px;line-height:1.75;color:rgba(255,255,255,.42);}

/* ===== 移动端顶部栏 / 抽屉 ===== */
.topbar{
  position:sticky;top:0;z-index:50;height:60px;display:flex;align-items:center;
  justify-content:space-between;padding:0 16px;background:var(--ink-deep);
  border-bottom:1px solid rgba(255,255,255,.08);
}
@media(min-width:1024px){.topbar{display:none;}}
.topbar-brand{display:flex;align-items:center;gap:9px;color:#fff;font-size:15px;font-weight:600;}
.topbar-brand svg{width:18px;height:18px;fill:var(--accent);}
.burger{width:44px;height:44px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;}
.burger span{display:block;width:22px;height:1.5px;background:#fff;transition:transform .24s ease,opacity .24s ease;}
.burger.is-open span:first-child{transform:translateY(3.75px) rotate(45deg);}
.burger.is-open span:last-child{transform:translateY(-3.75px) rotate(-45deg);}
.mask{
  position:fixed;inset:0;z-index:55;background:rgba(11,35,33,.5);
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;
}
.mask.is-open{opacity:1;visibility:visible;}
@media(min-width:1024px){.mask{display:none;}}

.main{padding-left:0;}
@media(min-width:1024px){.main{padding-left:248px;}}

/* ===== 通用组件 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;font-size:15px;font-weight:600;
  white-space:nowrap;transition:background .22s ease,transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-deep);transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn-primary:active{transform:translateY(0) scale(.99);}
.btn-primary svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .22s ease;}
.btn-primary:hover svg{transform:translateX(3px);}
.btn-ghost{background:#fff;border:1px solid var(--primary);color:var(--primary);}
.btn-ghost:hover{background:var(--primary-tint);border-color:var(--primary-deep);}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14px;font-weight:600;
  background-image:linear-gradient(currentColor,currentColor);
  background-repeat:no-repeat;background-size:0 1px;background-position:0 100%;
  transition:background-size .24s ease;
}
.btn-link:hover{background-size:100% 1px;}
.eyebrow{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--primary);}
.badge{display:inline-block;font-size:12px;padding:4px 10px;border-radius:999px;background:var(--primary-tint);color:var(--primary);}

.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-soft);padding-top:24px;}
.crumbs a:hover{color:var(--primary);}
.crumbs .sep{color:#C9C1B4;}
.crumbs .current{color:var(--ink);}

.sec{padding:64px 0;}
@media(min-width:768px){.sec{padding:96px 0;}}
@media(min-width:1280px){.sec{padding:112px 0;}}
.sec-head{max-width:760px;margin-bottom:36px;}
.sec-head h2{font-family:var(--serif);font-size:clamp(1.6rem,2.6vw,2.35rem);font-weight:600;line-height:1.3;margin:12px 0 10px;letter-spacing:-.01em;}
.sec-sub{font-size:15px;color:var(--ink-soft);}

/* ===== 分类页顶部 ===== */
.hero-cat{padding:0 0 56px;}
.hero-grid{display:grid;gap:36px;align-items:center;}
@media(min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:52px;}}
.h1-cat{font-family:var(--serif);font-size:clamp(1.9rem,3.2vw,2.9rem);font-weight:700;line-height:1.25;letter-spacing:-.015em;margin:16px 0 18px;}
.lede{font-size:16px;line-height:1.9;color:var(--ink-soft);max-width:58ch;margin-bottom:24px;}
.hero-img{position:relative;border-radius:var(--r-lg);overflow:hidden;aspect-ratio:4/5;background:var(--primary-tint);box-shadow:var(--shadow-md);}
.hero-img img{width:100%;height:100%;object-fit:cover;}
.hero-img::after{content:"";position:absolute;inset:12px;border:1px solid rgba(255,255,255,.6);border-radius:14px;pointer-events:none;}
.hero-tag{position:absolute;left:20px;bottom:20px;background:var(--accent);color:#fff;font-size:12px;padding:6px 14px;border-radius:999px;font-weight:600;}

.pill-bar{display:flex;gap:10px;overflow-x:auto;padding:6px 0 10px;scrollbar-width:none;-ms-overflow-style:none;}
.pill-bar::-webkit-scrollbar{display:none;}
.pill{
  flex:0 0 auto;display:inline-flex;align-items:center;height:44px;padding:0 18px;border-radius:999px;
  border:1px solid var(--line);background:#fff;font-size:14px;color:var(--ink-soft);
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.pill:hover{border-color:var(--primary);color:var(--primary);}
.pill-current{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600;}

/* ===== 终端对照 ===== */
.compare-grid{display:grid;gap:22px;align-items:start;}
@media(min-width:1024px){.compare-grid{grid-template-columns:1fr 1fr 1fr;gap:24px;}}
.compare-card{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 24px;box-shadow:var(--shadow-sm);
  transition:box-shadow .3s ease,transform .3s ease,border-color .3s ease;
}
.compare-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);border-color:rgba(14,111,104,.3);}
.compare-card--featured{border:2px solid var(--accent);box-shadow:var(--shadow-md);padding:32px 26px;}
@media(min-width:1024px){.compare-card--featured{margin-top:-22px;}}
.compare-card--featured::after{
  content:"推荐参考";position:absolute;top:-13px;right:22px;background:var(--accent);color:#fff;
  font-size:12px;font-weight:600;padding:3px 12px;border-radius:999px;
}
.compare-ico{width:40px;height:40px;border-radius:12px;background:var(--primary-tint);display:flex;align-items:center;justify-content:center;margin-bottom:16px;}
.compare-ico svg{width:20px;height:20px;fill:none;stroke:var(--primary);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.compare-name{font-size:1.25rem;font-weight:600;line-height:1.4;}
.compare-desc{font-size:13px;color:var(--ink-soft);margin:4px 0 20px;}
.spec-list{margin:0;}
.spec-row{display:flex;justify-content:space-between;gap:14px;padding:12px 0;border-top:1px solid var(--line);font-size:14px;line-height:1.7;}
.spec-row dt{color:var(--ink-soft);flex:0 0 auto;}
.spec-row dd{text-align:right;font-weight:600;color:var(--ink);}

/* ===== 提示条 ===== */
.tip-bar{
  background:var(--primary-tint);border-left:3px solid var(--accent);
  border-radius:var(--r-sm);padding:20px 24px;display:flex;gap:14px;align-items:flex-start;
  max-width:960px;
}
.tip-bar svg{width:20px;height:20px;flex:0 0 20px;margin-top:4px;fill:none;stroke:var(--primary);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.tip-bar p{font-size:15px;line-height:1.85;color:var(--ink);margin:0;}

/* ===== 步骤 ===== */
.steps{display:grid;gap:20px;}
@media(min-width:768px){.steps{grid-template-columns:1fr 1fr;}}
@media(min-width:1280px){.steps{grid-template-columns:repeat(4,1fr);}}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:24px;transition:box-shadow .3s ease,transform .3s ease;}
.step:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);}
.step-num{font-family:var(--serif);font-size:2rem;font-weight:700;color:var(--accent);line-height:1;margin-bottom:14px;}
.step h3{font-size:1.0625rem;font-weight:600;line-height:1.5;margin-bottom:8px;}
.step p{font-size:14px;line-height:1.8;color:var(--ink-soft);}

/* ===== 图文分栏 ===== */
.split{display:grid;gap:36px;align-items:center;}
@media(min-width:1024px){.split{grid-template-columns:7fr 5fr;gap:56px;}}
@media(min-width:1024px){.split--rev .split-text{order:2;}.split--rev .split-media{order:1;}}
.split h2{font-family:var(--serif);font-size:clamp(1.6rem,2.6vw,2.2rem);font-weight:600;line-height:1.35;margin:12px 0 14px;}
.split p{font-size:15.5px;line-height:1.9;color:var(--ink-soft);margin-bottom:18px;}
.frame{border-radius:var(--r-lg);overflow:hidden;background:var(--primary-tint);box-shadow:var(--shadow-md);aspect-ratio:16/10;}
.frame img{width:100%;height:100%;object-fit:cover;}
.dot-list{list-style:none;padding:0;margin:0;}
.dot-list li{position:relative;padding-left:18px;margin-bottom:12px;font-size:15px;line-height:1.8;color:var(--ink-soft);}
.dot-list li::before{content:"";position:absolute;left:0;top:.66em;width:6px;height:6px;border-radius:1px;background:var(--accent);}
.dot-list li strong{color:var(--ink);font-weight:600;}

/* ===== 编号清单 ===== */
.num-list{border-top:1px solid var(--line);}
.num-item{display:flex;gap:20px;padding:24px 0;border-bottom:1px solid var(--line);}
.num-item .idx{font-family:var(--serif);font-size:1.125rem;font-weight:700;color:var(--accent);flex:0 0 34px;line-height:1.6;}
.num-item h3{font-size:1.0625rem;font-weight:600;line-height:1.5;margin-bottom:6px;}
.num-item p{font-size:14.5px;line-height:1.8;color:var(--ink-soft);}
.aside-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;box-shadow:var(--shadow-sm);}
.aside-card h3{font-size:1.0625rem;font-weight:600;margin-bottom:10px;}
.aside-card p{font-size:14.5px;line-height:1.85;color:var(--ink-soft);}
.aside-figure{margin-top:20px;border-radius:var(--r-md);overflow:hidden;aspect-ratio:4/3;background:var(--primary-tint);}
.aside-figure img{width:100%;height:100%;object-fit:cover;}

/* ===== 相关内容 ===== */
.rel-grid{display:grid;gap:22px;}
@media(min-width:768px){.rel-grid{grid-template-columns:repeat(3,1fr);}}
.rel-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(14,111,104,.35);}
.rel-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--primary-tint);}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.rel-card:hover .rel-thumb img{transform:scale(1.03);}
.rel-body{padding:20px 22px 24px;}
.rel-body .badge{margin-bottom:10px;}
.rel-body h3{
  font-size:1.0625rem;font-weight:600;line-height:1.5;margin-bottom:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-body p{font-size:14px;line-height:1.8;color:var(--ink-soft);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}

/* ===== CTA ===== */
.cta-band{
  background:var(--ink-deep);color:#fff;border-radius:24px;padding:40px 28px;
  display:grid;gap:32px;box-shadow:var(--shadow-lg);
}
@media(min-width:1024px){.cta-band{grid-template-columns:7fr 5fr;gap:48px;padding:56px 48px;align-items:center;}}
.cta-band h2{font-family:var(--serif);font-size:clamp(1.6rem,2.6vw,2.2rem);font-weight:600;line-height:1.35;margin:12px 0 14px;color:#fff;}
.cta-band p{font-size:15.5px;line-height:1.9;color:rgba(255,255,255,.72);margin-bottom:24px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.cta-media{border-radius:var(--r-lg);overflow:hidden;aspect-ratio:4/3;background:rgba(255,255,255,.06);}
.cta-media img{width:100%;height:100%;object-fit:cover;}

/* ===== 页脚 ===== */
.site-foot{background:var(--ink-deep);color:rgba(255,255,255,.72);padding:56px 0 28px;margin-top:24px;}
.foot-grid{display:grid;gap:32px;}
@media(min-width:768px){.foot-grid{grid-template-columns:1fr 1fr;}}
@media(min-width:1024px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}}
.foot-brand-cn{font-family:var(--serif);font-size:1.25rem;font-weight:600;color:#fff;}
.foot-brand-en{font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.45);margin:6px 0 14px;}
.foot-desc{font-size:14px;line-height:1.8;margin:0;padding-top:14px;border-top:1px solid rgba(255,255,255,.12);max-width:290px;}
.foot-title{font-size:13px;font-weight:600;color:#fff;margin-bottom:14px;}
.foot-links{display:flex;flex-direction:column;gap:10px;}
.foot-links a,.foot-links span{font-size:13px;color:rgba(255,255,255,.72);}
.foot-links a{display:inline-block;transition:color .2s ease;}
.foot-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.foot-bottom{
  display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;
  margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  font-size:12px;color:rgba(255,255,255,.5);
}

/* ===== 入场动效 ===== */
@keyframes rise{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:translateY(0);}}
.rise{animation:rise .4s ease-out both;}
.rise-2{animation-delay:.06s;}
.rise-3{animation-delay:.12s;}
.rise-4{animation-delay:.18s;}
.rise-5{animation-delay:.24s;}
@media(prefers-reduced-motion:reduce){
  .rise{animation:none;opacity:1;transform:none;}
  html{scroll-behavior:auto;}
  .btn-primary:hover,.rel-card:hover,.compare-card:hover,.step:hover,.side-cta:hover{transform:none !important;}
  .rel-card:hover .rel-thumb img{transform:none !important;}
  .btn-primary:hover svg{transform:none !important;}
}

/* roulang page: category5 */
:root{
    --paper:#F7F4EF;
    --surface:#FFFFFF;
    --ink:#0E1B1A;
    --ink-deep:#0B2321;
    --ink-soft:#4A5A58;
    --line:#E4DED4;
    --primary:#0E6F68;
    --primary-deep:#084C48;
    --primary-tint:#DCEFEA;
    --accent:#FF6F3C;
    --accent-deep:#E85F2E;
    --accent-tint:#FFE7DC;
    --danger:#C9452F;
    --shadow-sm:0 1px 2px rgba(14,27,26,.05);
    --shadow-md:0 12px 30px -14px rgba(14,27,26,.20);
    --shadow-lg:0 24px 60px -24px rgba(14,27,26,.28);
    --radius-lg:20px;
    --radius-md:16px;
    --radius-sm:12px;
    --font-sans:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
    --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",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(--font-sans);
    font-size:16px;
    line-height:1.85;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
  summary{list-style:none;cursor:pointer;}
  summary::-webkit-details-marker{display:none;}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
  .num{font-variant-numeric:tabular-nums;}

  /* ---------- 容器 ---------- */
  .wrap{max-width:1200px;margin:0 auto;padding:0 24px;}
  @media (min-width:768px){.wrap{padding:0 32px;}}
  @media (min-width:1280px){.wrap{padding:0 48px;}}

  /* ---------- 侧栏 App Shell ---------- */
  .side-shell{
    position:fixed;top:0;left:0;bottom:0;width:248px;
    background:var(--ink-deep);
    border-right:1px solid rgba(255,255,255,.08);
    display:none;flex-direction:column;
    padding:26px 14px 20px;
    z-index:60;
  }
  @media (min-width:1024px){.side-shell{display:flex;}}
  .side-brand{display:flex;align-items:center;gap:10px;padding:0 8px 18px;}
  .brand-mark{
    width:20px;height:20px;flex:0 0 20px;border-radius:5px;
    background:var(--accent);
    display:flex;align-items:center;justify-content:center;
  }
  .brand-mark svg{width:13px;height:13px;fill:none;stroke:#fff;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
  .brand-cn{font-size:15px;font-weight:600;color:#fff;letter-spacing:.02em;line-height:1.3;}
  .brand-en{font-size:11px;letter-spacing:.12em;color:rgba(255,255,255,.5);line-height:1.4;}
  .side-divider{height:1px;background:rgba(255,255,255,.08);margin:0 8px 18px;}
  .side-group{font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.4);padding:0 8px;margin:0 0 10px;}
  .side-nav{display:flex;flex-direction:column;gap:4px;}
  .nav-link{
    position:relative;
    display:flex;align-items:center;gap:12px;
    height:44px;padding:0 14px;border-radius:10px;
    font-size:14px;color:rgba(255,255,255,.72);
    transition:background .2s ease,color .2s ease;
  }
  .nav-link svg{width:18px;height:18px;flex:0 0 18px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
  .nav-link:hover{color:#fff;background:rgba(255,255,255,.06);}
  .nav-link.active,.nav-link[aria-current="page"]{color:#fff;background:rgba(255,255,255,.08);}
  .nav-link.active::before,.nav-link[aria-current="page"]::before{
    content:"";position:absolute;left:-14px;top:50%;transform:translateY(-50%);
    width:3px;height:22px;border-radius:0 3px 3px 0;background:var(--accent);
  }
  .side-foot{margin-top:auto;padding:16px 8px 0;border-top:1px solid rgba(255,255,255,.08);}
  .side-cta{
    display:flex;align-items:center;justify-content:center;gap:8px;
    height:44px;border-radius:999px;background:var(--accent);
    color:#fff;font-size:14px;font-weight:600;
    transition:background .2s ease,transform .2s ease;
  }
  .side-cta:hover{background:var(--accent-deep);}
  .side-note{font-size:11px;color:rgba(255,255,255,.42);line-height:1.7;margin:12px 0 0;}

  /* ---------- 移动端顶部栏与抽屉 ---------- */
  .topbar{
    position:fixed;top:0;left:0;right:0;height:60px;
    background:var(--ink-deep);z-index:55;
    display:flex;align-items:center;justify-content:space-between;
    padding:0 18px;
    border-bottom:1px solid rgba(255,255,255,.08);
  }
  @media (min-width:1024px){.topbar{display:none;}}
  .topbar-brand{display:flex;align-items:center;gap:9px;}
  .topbar-brand .brand-cn{font-size:14px;}
  .burger{width:44px;height:44px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:6px;margin-right:-10px;}
  .burger span{display:block;width:22px;height:2px;background:#fff;border-radius:2px;transition:transform .24s cubic-bezier(.22,.8,.3,1),opacity .2s ease;}
  .burger.on span:nth-child(1){transform:translateY(4px) rotate(45deg);}
  .burger.on span:nth-child(2){transform:translateY(-4px) rotate(-45deg);}
  .drawer-mask{position:fixed;inset:0;background:rgba(11,35,33,.5);opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s;z-index:64;}
  .drawer-mask.on{opacity:1;visibility:visible;}
  .drawer{
    position:fixed;top:0;left:0;bottom:0;width:min(280px,82vw);
    background:var(--ink-deep);z-index:66;
    padding:24px 14px 20px;display:flex;flex-direction:column;
    transform:translateX(-102%);
    transition:transform .24s cubic-bezier(.22,.8,.3,1);
    overflow-y:auto;
  }
  .drawer.on{transform:translateX(0);}
  @media (min-width:1024px){.drawer,.drawer-mask{display:none;}}

  .main-area{min-height:100vh;padding-top:60px;}
  @media (min-width:1024px){.main-area{padding-top:0;padding-left:248px;}}

  /* ---------- 通用排版 ---------- */
  .h1{
    font-family:var(--font-serif);font-weight:700;
    font-size:clamp(1.9rem,3.2vw,2.9rem);
    line-height:1.25;letter-spacing:-.01em;color:var(--ink);
    margin:0 0 16px;
  }
  .h2{
    font-family:var(--font-serif);font-weight:600;
    font-size:clamp(1.6rem,2.6vw,2.35rem);
    line-height:1.3;color:var(--ink);margin:0 0 10px;
  }
  .h3{font-size:1.125rem;font-weight:600;line-height:1.5;color:var(--ink);margin:0 0 8px;}
  .eyebrow{
    font-size:.75rem;letter-spacing:.08em;color:var(--primary);
    font-weight:600;margin:0 0 14px;display:flex;align-items:center;gap:10px;
  }
  .eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px;}
  .h2-sub{margin:0 0 32px;color:var(--ink-soft);font-size:.9375rem;line-height:1.8;}
  .txt{margin:0 0 1.1em;color:var(--ink-soft);line-height:1.85;}
  .meta{font-size:.8125rem;letter-spacing:.04em;color:var(--ink-soft);}
  .dot-sep{display:inline-block;margin:0 8px;color:var(--line);}

  /* ---------- 面包屑 ---------- */
  .breadcrumb{font-size:13px;color:var(--ink-soft);padding:20px 0 4px;display:flex;flex-wrap:wrap;align-items:center;gap:6px;}
  .breadcrumb a{color:var(--ink-soft);transition:color .2s ease;}
  .breadcrumb a:hover{color:var(--primary);}
  .breadcrumb .cur{color:var(--ink);}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:9px;
    height:48px;padding:0 26px;border-radius:999px;
    font-size:15px;font-weight:600;line-height:1;
    transition:background .22s ease,color .22s ease,transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  }
  .btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .22s ease;}
  .btn:hover svg{transform:translateX(3px);}
  .btn-primary{background:var(--accent);color:#fff;box-shadow:var(--shadow-sm);}
  .btn-primary:hover{background:var(--accent-deep);transform:translateY(-1px);box-shadow:var(--shadow-md);}
  .btn-primary:active{transform:translateY(0) scale(.99);}
  .btn-ghost{background:#fff;color:var(--primary);border:1px solid var(--primary);}
  .btn-ghost:hover{background:var(--primary-tint);border-color:var(--primary-deep);}
  .link-more{
    display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary);
    background:linear-gradient(currentColor,currentColor) left bottom/0 1px no-repeat;
    padding-bottom:2px;transition:background-size .24s ease;
  }
  .link-more:hover{background-size:100% 1px;}

  /* ---------- 分类胶囊 ---------- */
  .chip-row{display:flex;gap:10px;overflow-x:auto;padding:4px 0 10px;scrollbar-width:none;}
  .chip-row::-webkit-scrollbar{display:none;}
  .chip{
    flex:0 0 auto;display:inline-flex;align-items:center;height:40px;padding:0 18px;
    border-radius:999px;background:#fff;border:1px solid var(--line);
    font-size:14px;color:var(--ink-soft);white-space:nowrap;
    transition:border-color .22s ease,color .22s ease,background .22s ease;
  }
  .chip:hover{border-color:var(--primary);color:var(--primary);}
  .chip.active{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600;}

  /* ---------- Hero ---------- */
  .hero{padding:8px 0 56px;}
  .hero-grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:start;}
  @media (min-width:1024px){
    .hero-grid{grid-template-columns:7fr 5fr;gap:56px;}
  }
  .hero-sub{font-size:1.0625rem;color:var(--primary);font-weight:600;margin:0 0 12px;}
  .hero-lead{font-size:1rem;color:var(--ink-soft);line-height:1.9;margin:0 0 22px;max-width:44em;}
  .trust-row{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;font-size:13px;color:var(--ink-soft);margin:0 0 26px;}
  .trust-row .sep{color:var(--line);}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
  .hero-figure{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);aspect-ratio:4/5;background:var(--primary-tint);}
  .hero-figure img{width:100%;height:100%;object-fit:cover;}
  .hero-figure::after{content:"";position:absolute;inset:12px;border:1px solid rgba(255,255,255,.6);border-radius:14px;pointer-events:none;}
  .hero-tag{
    position:absolute;left:20px;bottom:20px;z-index:2;
    background:var(--accent);color:#fff;font-size:12px;font-weight:600;
    padding:7px 14px;border-radius:999px;letter-spacing:.04em;
  }

  /* ---------- 板块通用 ---------- */
  .section{padding:40px 0 48px;}
  @media (min-width:768px){.section{padding:56px 0 64px;}}
  .section-tight{padding:24px 0 40px;}

  /* ---------- 深色 HUD 流程面板 ---------- */
  .hud{
    background:var(--ink-deep);border-radius:var(--radius-lg);
    padding:36px 28px;color:#fff;box-shadow:var(--shadow-lg);
    position:relative;overflow:hidden;
  }
  @media (min-width:768px){.hud{padding:44px 40px;}}
  .hud::before{
    content:"";position:absolute;top:0;left:0;right:0;height:2px;
    background:linear-gradient(90deg,var(--accent) 0 28%,rgba(255,255,255,.12) 28% 100%);
  }
  .hud-head{display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;align-items:flex-end;margin-bottom:30px;}
  .hud .h2{color:#fff;}
  .hud-stats{display:flex;gap:24px;}
  .hud-stat b{display:block;font-family:var(--font-serif);font-size:1.9rem;font-weight:700;color:var(--accent);line-height:1;font-variant-numeric:tabular-nums;}
  .hud-stat span{display:block;font-size:12px;color:rgba(255,255,255,.6);margin-top:6px;letter-spacing:.04em;}
  .hud-grid{display:grid;grid-template-columns:1fr;gap:0;}
  @media (min-width:640px){.hud-grid{grid-template-columns:repeat(2,1fr);}}
  @media (min-width:1024px){.hud-grid{grid-template-columns:repeat(5,1fr);}}
  .hud-step{padding:22px 0;border-top:1px solid rgba(255,255,255,.12);}
  @media (min-width:640px){.hud-step{padding:22px 22px 22px 0;}}
  @media (min-width:1024px){
    .hud-step{padding:0 20px;border-top:none;border-left:1px solid rgba(255,255,255,.12);}
    .hud-step:first-child{border-left:none;padding-left:0;}
    .hud-step:last-child{padding-right:0;}
  }
  .hud-num{font-family:var(--font-serif);font-size:1.5rem;font-weight:700;color:var(--accent);line-height:1;margin-bottom:14px;font-variant-numeric:tabular-nums;}
  .hud-title{font-size:1rem;font-weight:600;color:#fff;margin:0 0 8px;line-height:1.5;}
  .hud-text{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.66);margin:0;}

  /* ---------- 要点提示条 ---------- */
  .tip-bar{
    background:var(--primary-tint);border-left:3px solid var(--accent);
    border-radius:0 var(--radius-sm) var(--radius-sm) 0;
    padding:20px 24px;margin:28px 0 0;
  }
  .tip-bar .tip-title{font-size:13px;letter-spacing:.06em;color:var(--primary-deep);font-weight:600;margin:0 0 6px;}
  .tip-bar p{margin:0;color:#134E4A;font-size:14.5px;line-height:1.85;}

  /* ---------- 编号步骤清单 ---------- */
  .step-layout{display:grid;grid-template-columns:1fr;gap:36px;align-items:start;}
  @media (min-width:1024px){.step-layout{grid-template-columns:7fr 5fr;gap:56px;}}
  .step-list{border-top:1px solid var(--line);}
  .step-item{display:flex;gap:20px;padding:24px 0;border-bottom:1px solid var(--line);}
  .step-num{
    font-family:var(--font-serif);font-size:1.375rem;font-weight:700;color:var(--accent);
    line-height:1.2;flex:0 0 46px;font-variant-numeric:tabular-nums;
  }
  .step-item p{margin:0;color:var(--ink-soft);font-size:14.5px;line-height:1.8;}
  .figure-card{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);background:var(--primary-tint);}
  .figure-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
  .figure-card figcaption{font-size:13px;color:var(--ink-soft);padding:14px 20px 18px;background:#fff;margin:0;}

  /* ---------- FAQ ---------- */
  .faq{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);overflow:hidden;}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-item:last-child{border-bottom:none;}
  .faq-q{
    display:flex;align-items:center;justify-content:space-between;gap:18px;
    min-height:60px;padding:14px 24px;font-size:16px;font-weight:600;color:var(--ink);
    transition:color .2s ease;
  }
  .faq-q:hover{color:var(--primary);}
  .faq-icon{position:relative;width:16px;height:16px;flex:0 0 16px;}
  .faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ink-soft);transition:transform .22s ease,background .22s ease;}
  .faq-icon::before{left:0;top:7.25px;width:16px;height:1.5px;border-radius:2px;}
  .faq-icon::after{left:7.25px;top:0;width:1.5px;height:16px;border-radius:2px;}
  details[open] .faq-icon::after{transform:rotate(90deg);background:var(--accent);}
  details[open] .faq-q{color:var(--primary-deep);}
  .faq-a{padding:0 24px 20px;font-size:15px;line-height:1.85;color:var(--ink-soft);margin:0;}

  /* ---------- 两列小卡 ---------- */
  .mini-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:28px;}
  @media (min-width:768px){.mini-grid{grid-template-columns:repeat(2,1fr);gap:24px;}}
  .mini-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);
    padding:24px;box-shadow:var(--shadow-sm);
    transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  }
  .mini-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(14,111,104,.35);}
  .mini-card .badge{
    display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;
    background:var(--primary-tint);color:var(--primary);font-size:12px;font-weight:600;letter-spacing:.04em;margin-bottom:14px;
  }
  .mini-list{margin:12px 0 0;padding:0;list-style:none;}
  .mini-list li{position:relative;padding-left:18px;margin-bottom:10px;font-size:14.5px;color:var(--ink-soft);line-height:1.8;}
  .mini-list li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:2px;background:var(--accent);}

  /* ---------- 相关阅读 ---------- */
  .rel-grid{display:grid;grid-template-columns:1fr;gap:22px;}
  @media (min-width:768px){.rel-grid{grid-template-columns:repeat(3,1fr);}}
  .rel-card{
    display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
    border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);
    transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  }
  .rel-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(14,111,104,.35);}
  .rel-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--primary-tint);}
  .rel-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
  .rel-card:hover .thumb img{transform:scale(1.03);}
  .rel-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1;}
  .rel-cat{font-size:12px;color:var(--accent);font-weight:600;letter-spacing:.04em;margin-bottom:10px;}
  .rel-title{font-size:1.0625rem;font-weight:600;line-height:1.55;color:var(--ink);margin:0 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .rel-desc{font-size:14px;color:var(--ink-soft);line-height:1.8;margin:0 0 16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .rel-foot{margin-top:auto;font-size:12.5px;color:var(--ink-soft);}

  /* ---------- CTA ---------- */
  .cta-block{
    background:var(--ink-deep);border-radius:var(--radius-lg);overflow:hidden;
    display:grid;grid-template-columns:1fr;
  }
  @media (min-width:1024px){.cta-block{grid-template-columns:7fr 5fr;}}
  .cta-body{padding:38px 28px;color:#fff;}
  @media (min-width:768px){.cta-body{padding:48px 44px;}}
  .cta-body .h2{color:#fff;}
  .cta-body p{color:rgba(255,255,255,.7);font-size:15px;line-height:1.85;margin:0 0 26px;max-width:36em;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
  .cta-figure{position:relative;min-height:220px;}
  .cta-figure img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;}

  /* ---------- 页脚 ---------- */
  .site-foot{background:var(--ink-deep);color:rgba(255,255,255,.72);padding:56px 0 28px;margin-top:56px;}
  .foot-grid{display:grid;grid-template-columns:1fr;gap:32px;}
  @media (min-width:768px){.foot-grid{grid-template-columns:repeat(2,1fr);}}
  @media (min-width:1024px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}}
  .foot-brand-cn{font-size:16px;font-weight:600;color:#fff;margin-bottom:6px;}
  .foot-brand-en{font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.45);margin-bottom:14px;}
  .foot-desc{font-size:13px;line-height:1.8;color:rgba(255,255,255,.65);margin:0;border-top:1px solid rgba(14,111,104,.55);padding-top:14px;max-width:26em;}
  .foot-title{font-size:12px;letter-spacing:.1em;color:rgba(255,255,255,.5);margin-bottom:16px;}
  .foot-links{display:flex;flex-direction:column;gap:11px;font-size:13px;}
  .foot-links a{color:rgba(255,255,255,.72);width:fit-content;transition:color .2s ease;background:linear-gradient(currentColor,currentColor) left bottom/0 1px no-repeat;padding-bottom:2px;transition:color .2s ease,background-size .24s ease;}
  .foot-links a:hover{color:#fff;background-size:100% 1px;}
  .foot-bottom{
    margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
    display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
    font-size:12.5px;color:rgba(255,255,255,.5);
  }

  /* ---------- 动效 ---------- */
  .fade-up{opacity:0;transform:translateY(12px);animation:fadeUp .4s ease-out forwards;}
  .d1{animation-delay:.06s;}.d2{animation-delay:.12s;}.d3{animation-delay:.18s;}.d4{animation-delay:.24s;}.d5{animation-delay:.3s;}
  @keyframes fadeUp{to{opacity:1;transform:translateY(0);}}
  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{animation:none!important;transition:none!important;}
    .fade-up{opacity:1;transform:none;}
    html{scroll-behavior:auto;}
  }