/* roulang page: index */
:root{
  --ink:#131512;
  --ink-soft:#3A3F38;
  --muted:#6E726A;
  --paper:#F7F5EF;
  --paper-2:#EFEBE1;
  --line:#DFD9CC;
  --brand:#14524A;
  --brand-2:#1E6E62;
  --accent:#C9F24D;
  --deep:#0E1512;
  --danger:#A33A2B;
  --radius-btn:6px;
  --radius-card:12px;
  --radius-lg:20px;
  --shadow-1:0 1px 2px rgba(19,21,18,.04), 0 8px 24px -12px rgba(19,21,18,.12);
  --shadow-2:0 2px 4px rgba(19,21,18,.06), 0 16px 40px -16px rgba(19,21,18,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-soft);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-card)}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:800}
p{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-family:"Space Grotesk","Segoe UI",ui-sans-serif,system-ui,sans-serif;font-variant-numeric:tabular-nums}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,245,239,.86);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background .24s var(--ease),border-color .24s var(--ease);
}
.site-header.scrolled{background:rgba(247,245,239,.97);border-bottom-color:var(--line)}
.nav-bar{display:flex;align-items:center;gap:20px;height:72px;transition:height .24s var(--ease)}
.site-header.scrolled .nav-bar{height:64px}
.logo{display:inline-flex;align-items:baseline;gap:2px;font-size:19px;font-weight:900;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.logo em{font-style:normal;color:var(--brand)}
.nav{display:flex;align-items:center;gap:2px;flex:1;min-width:0}
.nav-link{position:relative;padding:10px 14px;font-size:15px;font-weight:500;color:var(--ink-soft);border-radius:var(--radius-btn);transition:color .2s var(--ease),background .2s var(--ease);white-space:nowrap}
.nav-link:hover{color:var(--brand);background:var(--paper-2)}
.nav-link.active{color:var(--ink);font-weight:700}
.nav-link.active::after{content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:4px;width:20px;height:2px;border-radius:2px;background:var(--brand)}
.nav-right{display:flex;align-items:center;gap:12px}
.mega{position:relative}
.mega-btn{display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 14px;background:transparent;border:1px solid var(--line);border-radius:var(--radius-btn);font-size:14px;font-weight:600;color:var(--ink);cursor:pointer;transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease)}
.mega-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--paper-2)}
.mega-btn svg{transition:transform .24s var(--ease)}
.mega:hover .mega-btn svg,.mega.open .mega-btn svg{transform:rotate(180deg)}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 14px);width:780px;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-2);padding:28px;
  display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:28px;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .2s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
}
.mega:hover .mega-panel,.mega:focus-within .mega-panel,.mega.open .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-title{font-size:12px;letter-spacing:.14em;color:var(--muted);font-weight:700;margin-bottom:14px}
.mega-list{display:grid;gap:12px}
.mega-item{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--ink-soft);transition:color .2s var(--ease)}
.mega-item::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--brand);flex:0 0 4px;transition:transform .2s var(--ease)}
.mega-item:hover{color:var(--brand)}
.mega-item:hover::before{transform:scale(1.3)}
.mega-post{display:block;padding-bottom:12px;border-bottom:1px solid var(--line);transition:color .2s var(--ease)}
.mega-post:last-child{border-bottom:none;padding-bottom:0}
.mega-post-title{display:block;font-size:14.5px;font-weight:600;color:var(--ink);line-height:1.5;transition:color .2s var(--ease)}
.mega-post:hover .mega-post-title{color:var(--brand)}
.mega-post-time{display:block;font-size:12.5px;color:var(--muted);margin-top:4px}
.mega-empty{font-size:13.5px;color:var(--muted)}
.mega-card{display:block;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;background:var(--paper-2);transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease)}
.mega-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--brand)}
.mega-card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0}
.mega-card span{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:14px 16px;font-size:14px;font-weight:600;color:var(--ink)}
.mega-card i{font-style:normal;transition:transform .2s var(--ease)}
.mega-card:hover i{transform:translateX(4px)}
.hamburger{display:none;width:44px;height:44px;border:1px solid var(--line);background:transparent;border-radius:var(--radius-btn);cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.hamburger span{display:block;width:18px;height:1.6px;background:var(--ink);transition:transform .24s var(--ease),opacity .2s var(--ease)}
.hamburger.on span:nth-child(1){transform:translateY(6.6px) rotate(45deg)}
.hamburger.on span:nth-child(2){opacity:0}
.hamburger.on span:nth-child(3){transform:translateY(-6.6px) rotate(-45deg)}
.drawer{
  position:fixed;left:0;right:0;top:72px;bottom:0;z-index:70;
  background:var(--paper);padding:24px;overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
}
.drawer.open{opacity:1;visibility:visible;transform:none}
.drawer-link{display:block;padding:16px 0;font-size:20px;font-weight:700;color:var(--ink);border-bottom:1px solid var(--line)}
.drawer-link.active{color:var(--brand)}
.drawer details{border-bottom:1px solid var(--line)}
.drawer summary{cursor:pointer;list-style:none;padding:16px 0;font-size:16px;font-weight:700;color:var(--ink);display:flex;align-items:center;justify-content:space-between}
.drawer summary::-webkit-details-marker{display:none}
.drawer summary::after{content:"+";color:var(--brand);font-weight:700}
.drawer details[open] summary::after{content:"−"}
.drawer-sub{display:grid;gap:12px;padding:0 0 16px 4px}
.drawer-sub a{font-size:15px;color:var(--ink-soft)}
.drawer-cta{margin-top:24px}

/* ---------- 按钮 ---------- */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 28px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;overflow:hidden;transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);white-space:nowrap}
.btn span{position:relative;z-index:1;display:inline-flex;align-items:center;gap:8px}
.btn-primary{background:var(--brand);color:#F7F5EF}
.btn-primary::before{content:"";position:absolute;inset:0;background:var(--brand-2);transform:scaleX(0);transform-origin:left center;transition:transform .2s var(--ease)}
.btn-primary:hover::before{transform:scaleX(1)}
.btn-primary:hover{transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{border-color:var(--brand);color:var(--brand);background:transparent}
.btn-ghost:hover{background:var(--brand);color:var(--paper)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
.btn-lg{height:52px;padding:0 32px}
.btn[disabled]{background:var(--line);color:var(--muted);cursor:not-allowed;border-color:transparent}
.btn[disabled]::before{display:none}

/* ---------- Hero ---------- */
.hero{padding:96px 0 88px}
.hero-grid{display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center}
.eyebrow{font-size:12px;letter-spacing:.14em;font-weight:700;color:var(--brand)}
.hero-title{font-size:clamp(34px,5.2vw,64px);font-weight:900;line-height:1.08;letter-spacing:-.02em;margin:16px 0 18px;max-width:15ch}
.hero-sub{font-size:18px;line-height:1.75;color:var(--ink-soft);max-width:26ch;margin-bottom:32px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-points{display:flex;flex-wrap:wrap;margin-top:30px;font-size:13px;color:var(--muted)}
.hero-points span{padding:0 14px;border-right:1px solid var(--line)}
.hero-points span:first-child{padding-left:0}
.hero-points span:last-child{border-right:none;padding-right:0}
.hero-media{position:relative;border-radius:16px;overflow:hidden;aspect-ratio:16/7;box-shadow:var(--shadow-1)}
.hero-media img{width:100%;height:100%;object-fit:cover;border-radius:16px}
.hero-media::before{content:"";position:absolute;inset:0;background:rgba(14,21,18,.58)}
.hero-media figcaption{position:absolute;left:24px;bottom:22px;right:24px;color:#F7F5EF;font-size:14px;letter-spacing:.06em;display:flex;align-items:center;gap:10px}
.hero-media figcaption b{font-weight:700}

/* ---------- 要点横条 ---------- */
.band{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.band-inner{display:grid;grid-template-columns:repeat(4,1fr)}
.band-item{padding:20px 12px;text-align:center;font-size:14px;color:var(--ink-soft);border-right:1px solid var(--line)}
.band-item:last-child{border-right:none}
.band-item b{display:block;font-size:15px;color:var(--ink);font-weight:700;margin-bottom:2px}
.band-item small{font-size:12.5px;color:var(--muted)}

/* ---------- 板块通用 ---------- */
.section{padding:96px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.sec-title{position:relative;padding-left:16px;font-size:clamp(24px,3vw,36px);font-weight:800;line-height:1.2;letter-spacing:-.01em}
.sec-title::before{content:"";position:absolute;left:0;top:.16em;width:3px;height:24px;border-radius:2px;background:var(--brand)}
.sec-sub{margin-top:14px;font-size:15px;color:var(--muted);max-width:62ch}
.sec-rule{height:1px;background:var(--line);margin-top:16px}
.more-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);transition:gap .2s var(--ease)}
.more-link:hover{gap:10px}

/* ---------- 三步 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-top:52px}
.step{position:relative;padding-right:32px}
.step:not(:last-child)::after{content:"";position:absolute;top:36px;right:0;width:32px;border-top:1px dashed var(--line)}
.step-no{display:inline-flex;align-items:center;justify-content:center;min-width:56px;height:56px;padding:0 12px;border-radius:12px;background:var(--accent);color:var(--ink);font-size:26px;font-weight:900;letter-spacing:-.02em}
.step h3{font-size:20px;font-weight:700;line-height:1.35;margin:18px 0 8px}
.step p{font-size:15px;line-height:1.8;color:var(--ink-soft)}
.step .step-tip{display:block;margin-top:12px;font-size:13px;color:var(--muted)}

/* ---------- 案例证明 ---------- */
.cases{display:grid;grid-template-columns:1.35fr 1fr;gap:24px;margin-top:52px}
.case-card{display:flex;flex-direction:column;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden;transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease)}
.case-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--brand)}
.case-media{aspect-ratio:4/3;width:100%;object-fit:cover;border-radius:0}
.case-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.case-body h3{font-size:20px;font-weight:700;line-height:1.35}
.case-body p{font-size:15px;color:var(--ink-soft);line-height:1.8}
.case-side{display:grid;gap:24px}
.case-side .case-media{aspect-ratio:16/9}
.case-side .case-body h3{font-size:18px}
.badge{display:inline-flex;align-items:center;align-self:flex-start;padding:4px 10px;border-radius:999px;background:var(--paper-2);color:var(--ink);font-size:12px;font-weight:600}
.badge-accent{background:var(--accent);color:var(--ink)}
.quote-bar{position:relative;margin-top:24px;padding:22px 26px;background:var(--paper-2);border-left:3px solid var(--brand);border-radius:0 var(--radius-card) var(--radius-card) 0}
.quote-bar p{font-size:16px;color:var(--ink);line-height:1.75}
.quote-bar cite{display:block;margin-top:10px;font-size:13px;font-style:normal;color:var(--muted)}

/* ---------- 资讯列表 ---------- */
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px}
.post-card{display:flex;flex-direction:column;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:24px;transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease)}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--brand)}
.post-title{font-size:19px;font-weight:700;line-height:1.35;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-excerpt{font-size:14.5px;color:var(--ink-soft);line-height:1.75;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{display:flex;align-items:center;gap:10px;margin-top:auto;font-size:13px;color:var(--muted);flex-wrap:wrap}
.tag{padding:4px 10px;border-radius:8px;background:var(--paper-2);color:var(--ink);font-size:12px;font-weight:600}
.post-arrow{margin-left:auto;color:var(--brand);font-weight:700;transition:transform .2s var(--ease)}
.post-card:hover .post-arrow{transform:translateX(4px)}
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;min-height:220px;padding:32px;margin-top:44px;background:var(--paper-2);border-radius:var(--radius-card);text-align:center}
.empty-state svg{width:36px;height:36px;stroke:var(--brand);fill:none;stroke-width:1.4}
.empty-state p{font-size:14px;color:var(--muted)}

/* ---------- FAQ ---------- */
.faq{max-width:920px;margin-top:44px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 0;font-size:17px;font-weight:600;color:var(--ink);cursor:pointer;list-style:none;transition:color .2s var(--ease)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-plus{position:relative;width:16px;height:16px;flex:0 0 16px;transition:transform .25s var(--ease)}
.faq-plus::before,.faq-plus::after{content:"";position:absolute;background:var(--brand);transition:opacity .25s var(--ease)}
.faq-plus::before{left:0;top:7.25px;width:16px;height:1.5px}
.faq-plus::after{left:7.25px;top:0;width:1.5px;height:16px}
.faq-item[open] summary{color:var(--brand)}
.faq-item[open] .faq-plus{transform:rotate(90deg)}
.faq-item[open] .faq-plus::after{opacity:0}
.faq-answer{padding:0 0 20px;max-width:74ch;font-size:15px;line-height:1.85;color:var(--ink-soft)}

/* ---------- CTA ---------- */
.cta-band{padding:0 0 96px}
.cta-inner{position:relative;border-radius:var(--radius-lg);overflow:hidden;padding:56px 72px;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;display:grid;grid-template-columns:1.25fr 1fr;gap:44px;align-items:center}
.cta-inner::before{content:"";position:absolute;inset:0;background:rgba(14,21,18,.78)}
.cta-copy,.cta-action{position:relative;z-index:1}
.cta-copy h2{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.2;color:#F7F5EF;margin-bottom:14px}
.cta-copy p{font-size:14px;line-height:1.8;color:rgba(247,245,239,.76);max-width:44ch}
.cta-form{display:flex;gap:12px;flex-wrap:wrap}
.field{flex:1 1 220px;min-width:200px;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-btn);padding:13px 16px;font-size:15px;color:var(--ink);transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.field::placeholder{color:var(--muted)}
.field:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(201,242,77,.55)}
.field.error{border-color:var(--danger)}
.cta-note{margin-top:12px;font-size:13px;color:rgba(247,245,239,.6)}
.cta-note.err{color:#F0A79A}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--deep);color:rgba(247,245,239,.72);padding:64px 0 0}
.f-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px}
.f-brand{font-size:20px;font-weight:700;color:#F7F5EF;letter-spacing:-.01em}
.f-brand em{font-style:normal;color:var(--accent)}
.f-desc{margin-top:14px;font-size:14px;line-height:1.8;color:rgba(247,245,239,.6);max-width:34ch}
.f-site{display:inline-block;margin-top:14px;font-size:14px;color:rgba(247,245,239,.72);text-decoration:underline;text-underline-offset:3px}
.f-site:hover{color:#F7F5EF}
.f-title{font-size:14px;font-weight:700;color:#F7F5EF;margin-bottom:18px;letter-spacing:.02em}
.f-list{list-style:none;display:grid;gap:12px}
.f-link{position:relative;display:inline-block;font-size:14px;color:rgba(247,245,239,.72);transition:color .2s var(--ease),padding-left .2s var(--ease)}
.f-link::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:4px;border-radius:50%;background:transparent;transition:background .2s var(--ease)}
.f-link:hover{color:#F7F5EF;padding-left:12px}
.f-link:hover::before{background:var(--accent)}
.f-bottom{margin-top:48px;border-top:1px solid rgba(247,245,239,.12);padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(247,245,239,.5)}
.f-bottom a{text-decoration:underline;text-underline-offset:3px}

/* ---------- 入场动效 ---------- */
html.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .48s var(--ease),transform .48s var(--ease)}
html.js .reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (min-width:1024px) and (max-width:1279px){
  .wrap{max-width:960px}
}
@media (max-width:1279px){
  .mega-panel{width:680px}
}
@media (max-width:1023px){
  .nav,.nav-right .mega,.nav-right .nav-cta{display:none}
  .hamburger{display:inline-flex}
  .nav-right{margin-left:auto}
  .hero{padding:72px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-media{order:2;aspect-ratio:16/9}
  .hero-sub{max-width:46ch}
  .section{padding:72px 0}
  .steps{grid-template-columns:repeat(2,1fr);gap:28px}
  .step{padding-right:0}
  .step:not(:last-child)::after{display:none}
  .cases{grid-template-columns:1fr}
  .posts{grid-template-columns:repeat(2,1fr)}
  .cta-inner{grid-template-columns:1fr;padding:44px 40px;gap:28px}
  .cta-band{padding-bottom:72px}
  .f-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767px){
  .wrap{padding:0 20px}
  .hero{padding:56px 0 48px}
  .hero-title{font-size:clamp(30px,8vw,40px)}
  .hero-sub{font-size:16.5px}
  .hero-actions{gap:10px}
  .hero-actions .btn{width:100%}
  .hero-points{font-size:12.5px;row-gap:8px}
  .band-inner{grid-template-columns:repeat(2,1fr)}
  .band-item:nth-child(2n){border-right:none}
  .band-item:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .section{padding:56px 0}
  .steps{grid-template-columns:1fr;gap:32px;margin-top:36px}
  .step-no{min-width:48px;height:48px;font-size:22px}
  .posts{grid-template-columns:1fr;gap:20px;margin-top:32px}
  .post-card{padding:20px}
  .case-body{padding:20px}
  .cta-band{padding-bottom:56px}
  .cta-inner{padding:36px 24px;border-radius:16px}
  .cta-form{flex-direction:column}
  .cta-form .btn{width:100%}
  .f-grid{grid-template-columns:1fr;gap:32px}
  .site-footer{padding:52px 0 0}
  .f-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .faq-item summary{font-size:16px;padding:18px 0}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  html.js .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --ink:#131512;
  --ink-soft:#3A3F38;
  --muted:#6E726A;
  --paper:#F7F5EF;
  --paper-2:#EFEBE1;
  --line:#DFD9CC;
  --brand:#14524A;
  --brand-2:#1E6E62;
  --accent:#C9F24D;
  --deep:#0E1512;
  --danger:#A33A2B;
  --r-btn:6px;
  --r-card:12px;
  --r-lg:18px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(19,21,18,.04),0 8px 24px -12px rgba(19,21,18,.12);
  --shadow-2:0 2px 4px rgba(19,21,18,.06),0 16px 40px -16px rgba(19,21,18,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --sec-y:96px;
}
*,*::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:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
svg{display:block}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--sec-y) 0}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;height:72px;
  background:rgba(247,245,239,.9);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:height .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.scrolled{height:64px;border-bottom-color:var(--line);box-shadow:0 8px 28px -22px rgba(19,21,18,.5)}
.header-inner{display:flex;align-items:center;gap:24px;height:100%}
.header-inner > .brand,.header-inner > .header-right{position:relative;z-index:3}
.brand{
  font-size:19px;font-weight:900;letter-spacing:-.01em;color:var(--ink);
  display:flex;align-items:baseline;gap:6px;white-space:nowrap;
}
.brand em{font-style:normal;font-size:12px;font-weight:600;color:var(--brand);letter-spacing:.06em}
.nav{position:relative;z-index:1;flex:1;display:flex;justify-content:center;gap:30px}
.nav-link{
  position:relative;padding:6px 2px;font-size:15px;font-weight:500;color:var(--ink-soft);
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-2px;height:2px;width:0;background:var(--brand);
  transform:translateX(-50%);transition:width .22s var(--ease);
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{width:20px}
.nav-link.active{color:var(--ink);font-weight:700}
.nav-link.active::after{width:20px}
.header-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.mega-wrap{position:relative}
.mega-trigger{
  display:inline-flex;align-items:center;gap:6px;height:38px;padding:0 12px;
  font-size:14px;font-weight:600;color:var(--ink-soft);border-radius:var(--r-btn);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.mega-trigger:hover{color:var(--brand);background:var(--paper-2)}
.mega-trigger svg{transition:transform .22s var(--ease)}
.mega-wrap.open .mega-trigger svg{transform:rotate(180deg)}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 14px);width:820px;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-2);padding:28px;
  display:grid;grid-template-columns:1.05fr 1fr 1fr;gap:26px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
}
.mega-wrap.open .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-title{font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--brand);margin-bottom:14px}
.mega-list li + li{margin-top:2px}
.mega-link{
  display:flex;align-items:center;gap:10px;padding:8px 0;font-size:14px;color:var(--ink-soft);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.mega-link i{width:4px;height:4px;border-radius:50%;background:var(--brand);flex:none;transition:transform .2s var(--ease)}
.mega-link:hover{color:var(--brand);transform:translateX(4px)}
.mega-link:hover i{transform:scale(1.3)}
.mega-post{display:block;padding:10px 0;border-bottom:1px solid var(--line)}
.mega-post:last-child{border-bottom:0}
.mega-post strong{display:block;font-size:14px;font-weight:600;color:var(--ink);line-height:1.5}
.mega-post:hover strong{color:var(--brand)}
.mega-post span{font-size:12px;color:var(--muted)}
.mega-card{
  display:block;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  background:var(--paper-2);transition:box-shadow .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease);
}
.mega-card img{width:100%;aspect-ratio:4/3;object-fit:cover}
.mega-card p{padding:12px 14px;font-size:14px;font-weight:600;line-height:1.5;display:flex;align-items:center;gap:6px}
.mega-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--brand)}
.burger{display:none;width:44px;height:44px;border-radius:var(--r-btn);align-items:center;justify-content:center;flex-direction:column;gap:5px}
.burger span{display:block;width:20px;height:2px;background:var(--ink);transition:transform .24s var(--ease),opacity .24s var(--ease)}
.drawer-cta{display:none}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:background-size .22s var(--ease),transform .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{
  color:#F7F5EF;background-color:var(--brand);
  background-image:linear-gradient(var(--brand-2),var(--brand-2));
  background-repeat:no-repeat;background-size:0% 100%;
  border:1px solid var(--brand);
}
.btn-primary:hover{background-size:100% 100%;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{color:var(--brand);border:1px solid var(--brand);background:transparent}
.btn-outline:hover{background:var(--brand);color:#F7F5EF;transform:translateY(-1px)}
.btn-outline:active{transform:translateY(1px)}
.btn-light{color:var(--ink);background:var(--paper);border:1px solid var(--paper)}
.btn-light:hover{background:var(--accent);border-color:var(--accent);transform:translateY(-1px)}
.btn-ghost-light{color:#F7F5EF;border:1px solid rgba(247,245,239,.5);background:transparent}
.btn-ghost-light:hover{border-color:var(--accent);color:var(--accent)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn-lg{height:52px;padding:0 32px;font-size:16px}
.btn[disabled],.btn.is-disabled{background:var(--line);border-color:var(--line);color:var(--muted);cursor:not-allowed;transform:none;background-image:none}

/* ---------- breadcrumb & article head ---------- */
.article-head{padding:56px 0 0}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li + li::before{content:"/";color:var(--line)}
.crumbs a{transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--brand)}
.crumbs .current{color:var(--ink-soft);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  background:var(--paper-2);color:var(--ink);font-size:12px;font-weight:600;
}
.badge-accent{background:var(--accent);color:var(--ink)}
.article-head .badge{margin:28px 0 16px}
.article-head h1{
  font-size:clamp(28px,4vw,44px);font-weight:800;line-height:1.22;letter-spacing:-.01em;
  max-width:900px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:22px;font-size:13px;color:var(--muted)}
.meta-row .sep{width:1px;height:12px;background:var(--line)}
.article-head .divider{margin-top:28px}

/* ---------- article body ---------- */
.article-main{padding:56px 0 0}
.article-layout{
  display:grid;grid-template-columns:minmax(0,760px);
  justify-content:center;column-gap:56px;align-items:start;
}
.article-layout.with-toc{grid-template-columns:200px minmax(0,760px)}
.toc{position:sticky;top:104px;display:none}
.article-layout.with-toc .toc{display:block}
.toc-title{font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--brand);margin-bottom:12px}
.toc-list li a{
  display:block;font-size:13px;color:var(--muted);padding:6px 0 6px 12px;
  border-left:2px solid var(--line);line-height:1.55;transition:color .2s var(--ease),border-color .2s var(--ease);
}
.toc-list li a:hover,.toc-list li a.current{color:var(--brand);border-left-color:var(--brand)}
.article-body{
  font-size:17px;line-height:1.9;color:var(--ink-soft);word-wrap:break-word;
}
.article-body > * + *{margin-top:1.5em}
.article-body h2{
  position:relative;font-size:24px;font-weight:800;line-height:1.35;color:var(--ink);
  margin-top:48px;margin-bottom:16px;padding-left:14px;letter-spacing:-.01em;
}
.article-body h2::before{content:"";position:absolute;left:0;top:6px;width:3px;height:24px;background:var(--brand);border-radius:2px}
.article-body h3{
  font-size:19px;font-weight:700;line-height:1.4;color:var(--ink);margin-top:32px;margin-bottom:12px;
}
.article-body h4{font-size:17px;font-weight:700;color:var(--ink);margin-top:24px;margin-bottom:10px}
.article-body p{margin:0}
.article-body strong{color:var(--ink);font-weight:700}
.article-body a{color:var(--brand);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.article-body a:hover{text-decoration-thickness:2px}
.article-body ul,.article-body ol{padding-left:24px;list-style:revert}
.article-body li{margin:8px 0}
.article-body li::marker{color:var(--brand)}
.article-body blockquote{
  margin:28px 0;padding:16px 20px;background:var(--paper-2);border-left:3px solid var(--brand);
  border-radius:0 var(--r-card) var(--r-card) 0;color:var(--ink-soft);
}
.article-body blockquote p{margin:0}
.article-body img{border-radius:var(--r-card);margin:28px auto;width:100%;object-fit:cover}
.article-body figure{margin:28px 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px}
.article-body pre{
  background:var(--paper-2);border-radius:var(--r-card);padding:18px 20px;overflow-x:auto;
  font-family:"Space Grotesk",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;line-height:1.7;
}
.article-body code{
  background:var(--paper-2);border-radius:4px;padding:2px 6px;font-size:14px;
  font-family:"Space Grotesk",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body pre code{background:none;padding:0}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;display:block;overflow-x:auto}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left}
.article-body th{background:var(--paper-2);color:var(--ink);font-weight:700}
.empty-state{
  min-height:220px;background:var(--paper-2);border-radius:var(--r-card);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;text-align:center;padding:40px 24px;
}
.empty-state svg{width:40px;height:40px;color:var(--muted)}
.empty-state p{font-size:14px;color:var(--muted)}
.empty-state strong{display:block;font-size:18px;color:var(--ink)}

/* ---------- section heading ---------- */
.sec-head{margin-bottom:36px}
.sec-eyebrow{font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--brand);margin-bottom:12px}
.sec-title{
  position:relative;padding-left:14px;
  font-size:clamp(24px,3vw,36px);font-weight:800;line-height:1.2;letter-spacing:-.01em;color:var(--ink);
}
.sec-title::before{content:"";position:absolute;left:0;top:8px;width:3px;height:24px;background:var(--brand);border-radius:2px}
.sec-head .divider{margin-top:16px}
.sec-sub{margin-top:16px;font-size:16px;color:var(--ink-soft);max-width:680px}

/* ---------- related cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;background:var(--paper);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--shadow-1);overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--brand)}
.card img{width:100%;aspect-ratio:4/3;object-fit:cover}
.card-body{padding:24px;display:flex;flex-direction:column;gap:8px;flex:1}
.card h3{font-size:19px;font-weight:700;line-height:1.35;color:var(--ink)}
.card:hover h3{color:var(--brand)}
.card p{font-size:15px;color:var(--ink-soft);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted)}
.card-foot .arrow{transition:transform .22s var(--ease)}
.card:hover .arrow{transform:translateX(4px);color:var(--brand)}

/* ---------- prev / next ---------- */
.nav-links{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.nav-box{
  display:flex;flex-direction:column;gap:6px;padding:24px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--paper);transition:background .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.nav-box span{font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--muted)}
.nav-box strong{font-size:16px;font-weight:700;color:var(--ink);line-height:1.5;transition:color .2s var(--ease)}
.nav-box:hover{background:var(--paper-2);border-color:var(--brand);transform:translateY(-2px)}
.nav-box:hover strong{color:var(--brand)}
.nav-box.next{text-align:right;align-items:flex-end}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;text-align:left;font-size:17px;font-weight:600;color:var(--ink);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-item.open .faq-q{color:var(--brand)}
.faq-icon{position:relative;width:16px;height:16px;flex:none;transition:transform .26s var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:currentColor;border-radius:2px}
.faq-icon::before{left:0;top:7px;width:16px;height:2px}
.faq-icon::after{left:7px;top:0;width:2px;height:16px}
.faq-item.open .faq-icon{transform:rotate(90deg)}
.faq-item.open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a-inner{padding:0 0 22px;font-size:15px;line-height:1.85;color:var(--ink-soft);max-width:820px}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  background-image:linear-gradient(rgba(14,21,18,.78),rgba(14,21,18,.78)),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;color:#F7F5EF;
  padding:72px 56px;display:flex;align-items:center;justify-content:space-between;gap:40px;
}
.cta-band h2{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.22;letter-spacing:-.01em;color:#F7F5EF}
.cta-band p{margin-top:14px;font-size:14px;color:rgba(247,245,239,.78);max-width:560px}
.cta-actions{display:flex;gap:14px;flex:none}
.cta-form{display:flex;gap:12px;flex:none}
.cta-form input{
  height:44px;width:230px;padding:0 16px;border-radius:var(--r-btn);
  background:rgba(247,245,239,.12);border:1px solid rgba(247,245,239,.28);color:#F7F5EF;font-size:14px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.cta-form input::placeholder{color:rgba(247,245,239,.6)}
.cta-form input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px rgba(201,242,77,.35);background:rgba(247,245,239,.18)}
.cta-form input.is-error{border-color:var(--danger);box-shadow:none}
.form-hint{font-size:13px;color:var(--danger);margin-top:8px;display:none}
.form-hint.show{display:block}

/* ---------- back link ---------- */
.back-row{padding:56px 0 72px;text-align:center}
.back-link{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--brand);
  transition:gap .2s var(--ease),color .2s var(--ease);
}
.back-link:hover{gap:14px;color:var(--brand-2)}

/* ---------- footer ---------- */
.site-footer{background:var(--deep);color:rgba(247,245,239,.72);padding:72px 0 28px;margin-top:0}
.f-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.f-brand{font-size:20px;font-weight:700;color:#F7F5EF;display:flex;align-items:baseline;gap:8px}
.f-brand em{font-style:normal;font-size:12px;color:var(--accent);letter-spacing:.06em}
.f-desc{margin-top:14px;font-size:14px;line-height:1.85;color:rgba(247,245,239,.72);max-width:320px}
.f-site{display:inline-block;margin-top:16px;font-size:13px;color:rgba(247,245,239,.72);text-decoration:underline;text-underline-offset:3px;transition:color .2s var(--ease)}
.f-site:hover{color:var(--accent)}
.f-title{font-size:14px;font-weight:700;color:#F7F5EF;margin-bottom:16px}
.f-list li + li{margin-top:10px}
.f-link{position:relative;font-size:14px;color:rgba(247,245,239,.72);padding-left:0;transition:color .2s var(--ease),padding-left .2s var(--ease)}
.f-link::before{
  content:"";position:absolute;left:0;top:50%;width:4px;height:4px;border-radius:50%;background:var(--accent);
  transform:translateY(-50%) scale(0);transition:transform .2s var(--ease);
}
.f-link:hover{color:#F7F5EF;padding-left:12px}
.f-link:hover::before{transform:translateY(-50%) scale(1)}
.f-bottom{
  margin-top:56px;padding-top:20px;border-top:1px solid rgba(247,245,239,.16);
  display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;font-size:13px;color:rgba(247,245,239,.6);
}
.f-bottom a{text-decoration:underline;text-underline-offset:3px}
.f-bottom a:hover{color:var(--accent)}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s var(--ease),transform .48s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  :root{--sec-y:80px}
  .wrap{max-width:960px}
  .mega-panel{width:720px;grid-template-columns:1fr 1fr;}
  .mega-panel .mega-col-card{grid-column:span 2}
}
@media (max-width:1100px){
  .article-layout,.article-layout.with-toc{grid-template-columns:minmax(0,760px)}
  .toc{display:none !important}
}
@media (max-width:1023px){
  :root{--sec-y:72px}
  .burger{display:flex}
  .nav{
    position:fixed;z-index:1;left:0;right:0;top:0;bottom:0;
    flex-direction:column;justify-content:flex-start;gap:0;
    padding:96px 24px 140px;background:var(--paper);overflow-y:auto;
    transform:translateX(-101%);transition:transform .3s var(--ease);
  }
  body.nav-open .nav{transform:translateX(0)}
  body.nav-open{overflow:hidden}
  .nav-link{width:100%;font-size:20px;font-weight:700;padding:18px 0;border-bottom:1px solid var(--line);color:var(--ink)}
  .nav-link::after{display:none}
  .nav-link.active{color:var(--brand)}
  .drawer-cta{display:block;margin-top:32px}
  .drawer-cta .btn{width:100%}
  .mega-panel{
    position:fixed;left:16px;right:16px;top:82px;width:auto;
    grid-template-columns:1fr;gap:20px;max-height:74vh;overflow-y:auto;
  }
  .mega-panel .mega-col-card{grid-column:auto}
  .cta-band{flex-direction:column;align-items:flex-start;padding:48px 28px}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
  .cta-form{width:100%;flex-direction:column}
  .cta-form input{width:100%}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .f-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  :root{--sec-y:56px}
  .wrap{padding:0 20px}
  .brand{font-size:17px}
  .brand em{display:none}
  .article-head{padding:36px 0 0}
  .article-main{padding:36px 0 0}
  .card-grid{grid-template-columns:1fr}
  .card-body{padding:20px}
  .nav-links{grid-template-columns:1fr}
  .nav-box.next{text-align:left;align-items:flex-start}
  .cta-band{padding:40px 22px}
  .f-grid{grid-template-columns:1fr;gap:28px}
  .f-bottom{flex-direction:column;gap:6px}
  .back-row{padding:40px 0 56px}
  .crumbs .current{max-width:200px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --ink:#131512;
  --ink-soft:#3A3F38;
  --muted:#6E726A;
  --paper:#F7F5EF;
  --paper-2:#EFEBE1;
  --line:#DFD9CC;
  --brand:#14524A;
  --brand-2:#1E6E62;
  --accent:#C9F24D;
  --deep:#0E1512;
  --danger:#A33A2B;
  --shadow-1:0 1px 2px rgba(19,21,18,.04),0 8px 24px -12px rgba(19,21,18,.12);
  --shadow-2:0 2px 4px rgba(19,21,18,.06),0 16px 40px -16px rgba(19,21,18,.18);
  --r-btn:6px;
  --r-card:12px;
  --r-lg:18px;
  --font:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Space Grotesk","DIN Alternate","SFMono-Regular",ui-monospace,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-soft);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-card);object-fit:cover}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-2)}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section.tight{padding:72px 0}
.sec-head{position:relative;padding-left:16px;margin-bottom:40px}
.sec-head::before{content:"";position:absolute;left:0;top:6px;width:3px;height:24px;background:var(--brand);border-radius:2px}
.eyebrow{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--brand);
  font-weight:700;
  margin-bottom:10px;
}
h1,h2,h3{color:var(--ink);letter-spacing:-.01em}
.sec-head h2{font-size:clamp(24px,3vw,36px);font-weight:800;line-height:1.2}
.lead{margin-top:14px;font-size:16px;color:var(--ink-soft);max-width:760px}
.hr-line{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 28px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  position:relative;
  overflow:hidden;
  transition:transform .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.btn-primary{background:var(--brand);color:#F7F5EF}
.btn-primary::after{
  content:"";position:absolute;inset:0;background:var(--brand-2);
  transform:translateX(-101%);transition:transform .2s ease;z-index:0;
}
.btn-primary:hover{color:#F7F5EF;transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-primary:hover::after{transform:translateX(0)}
.btn-primary:active{transform:translateY(1px)}
.btn-primary span{position:relative;z-index:1}
.btn-ghost{border-color:var(--brand);color:var(--brand);background:transparent}
.btn-ghost:hover{background:var(--brand);color:#F7F5EF;transform:translateY(-1px)}
.btn-light{background:#F7F5EF;color:var(--deep);border-color:#F7F5EF}
.btn-light:hover{background:transparent;color:#F7F5EF;transform:translateY(-1px)}
.btn-outline-light{border-color:rgba(247,245,239,.6);color:#F7F5EF;background:transparent}
.btn-outline-light:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.btn-sm{height:44px;padding:0 20px;font-size:14px}
.btn[disabled],.btn.is-disabled{background:var(--line);color:var(--muted);cursor:not-allowed;border-color:var(--line)}
.btn[disabled]:hover,.btn.is-disabled:hover{transform:none;box-shadow:none}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;
  background:var(--paper-2);color:var(--ink);
  border-radius:999px;padding:4px 10px;
  font-size:12px;font-weight:600;
}
.badge-accent{background:var(--accent);color:var(--ink)}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .24s ease,border-color .24s ease,backdrop-filter .24s ease;
}
.site-header.scrolled{
  background:rgba(247,245,239,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-bar{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  height:72px;transition:height .24s ease;
}
.site-header.scrolled .nav-bar{height:64px}
.brand{
  font-size:19px;font-weight:900;color:var(--ink);letter-spacing:-.01em;
  display:inline-flex;align-items:baseline;white-space:nowrap;
}
.brand em{font-style:normal;font-size:13px;font-weight:700;color:var(--brand);margin-left:6px}
.brand:hover{color:var(--ink)}
.nav{display:flex;align-items:center;gap:28px;flex:1;justify-content:center}
.nav-link{
  position:relative;font-size:15px;color:var(--ink-soft);padding:6px 2px;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-4px;height:2px;width:0;
  background:var(--brand);transform:translateX(-50%);
  transition:width .2s ease;
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{width:100%}
.nav-link.active{color:var(--ink);font-weight:700}
.nav-link.active::after{width:20px}
.nav-side{display:flex;align-items:center;gap:12px;position:relative}
.mega-wrap{position:relative}
.mega-trigger{
  display:inline-flex;align-items:center;gap:8px;
  height:44px;padding:0 16px;border-radius:var(--r-btn);
  background:transparent;border:1px solid var(--line);
  color:var(--ink);font-size:14px;font-weight:600;cursor:pointer;
  transition:border-color .2s ease,color .2s ease,background-color .2s ease;
}
.mega-trigger:hover{border-color:var(--brand);color:var(--brand)}
.caret{
  width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;
  transform:rotate(45deg) translateY(-2px);transition:transform .2s ease;
}
.mega-wrap.open .caret{transform:rotate(-135deg) translateY(-2px)}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 14px);
  width:780px;max-width:calc(100vw - 48px);
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-2);
  padding:28px;
  display:grid;grid-template-columns:1.15fr 1fr 1.1fr;gap:28px;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
}
.mega-wrap.open .mega-panel,
.mega-wrap:hover .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-title{font-size:12px;letter-spacing:.14em;color:var(--brand);font-weight:700;margin-bottom:14px}
.mega-links li{margin-bottom:12px}
.mega-links a{
  position:relative;display:block;font-size:14px;color:var(--ink-soft);padding-left:16px;line-height:1.5;
}
.mega-links a::before{
  content:"";position:absolute;left:0;top:8px;width:4px;height:4px;border-radius:999px;
  background:var(--brand);transition:transform .2s ease;
}
.mega-links a:hover{color:var(--brand)}
.mega-links a:hover::before{transform:scale(1.3)}
.mega-item{border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:12px}
.mega-item:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.mega-item a{display:block;font-size:14px;font-weight:600;color:var(--ink);line-height:1.5}
.mega-item a:hover{color:var(--brand)}
.mega-item span{display:block;font-size:13px;color:var(--muted);margin-top:6px}
.mega-card{
  display:block;border:1px solid var(--line);border-radius:var(--r-card);
  padding:14px;background:var(--paper-2);transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.mega-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--brand)}
.mega-card img{aspect-ratio:4/3;width:100%;margin-bottom:12px}
.mega-card strong{display:block;font-size:14px;color:var(--ink);line-height:1.5}
.mega-card .arrow{display:inline-block;margin-top:8px;color:var(--brand);font-size:14px;transition:transform .2s ease}
.mega-card:hover .arrow{transform:translateX(4px)}
.hamburger{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 10px;
  background:transparent;border:1px solid var(--line);border-radius:var(--r-btn);cursor:pointer;
}
.hamburger span{display:block;height:2px;background:var(--ink);border-radius:2px}

/* ---------- 抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:80;background:var(--paper);
  padding:24px;display:flex;flex-direction:column;gap:8px;
  transform:translateX(100%);transition:transform .28s cubic-bezier(.22,.61,.36,1);
  overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:transparent;font-size:18px;color:var(--ink);cursor:pointer;
}
.drawer .nav-link{font-size:20px;font-weight:700;color:var(--ink);padding:14px 0;border-bottom:1px solid var(--line)}
.drawer .nav-link::after{display:none}
.drawer .nav-link.active{color:var(--brand)}
.drawer details{margin-top:16px;border:1px solid var(--line);border-radius:var(--r-card);padding:4px 16px}
.drawer summary{
  list-style:none;cursor:pointer;font-size:16px;font-weight:700;color:var(--ink);
  padding:14px 0;display:flex;justify-content:space-between;align-items:center;
}
.drawer summary::-webkit-details-marker{display:none}
.drawer details .mega-links{padding-bottom:12px}
.drawer-cta{margin-top:auto;padding-top:24px}
.drawer-cta .btn{width:100%}

/* ---------- Hero ---------- */
main{padding-top:28px}
.hero{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  min-height:320px;display:flex;align-items:center;
  background-image:linear-gradient(90deg,rgba(14,21,18,.86),rgba(14,21,18,.52)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.hero-inner{position:relative;z-index:2;padding:56px 48px;max-width:760px}
.hero .eyebrow{color:var(--accent)}
.hero h1{
  color:#F7F5EF;font-size:clamp(30px,4.2vw,50px);font-weight:900;line-height:1.1;letter-spacing:-.02em;
}
.hero p{margin-top:18px;color:rgba(247,245,239,.82);font-size:18px;line-height:1.7;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.crumb{margin:0 0 18px}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li+li::before{content:"/";color:var(--line)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand)}
.crumb [aria-current="page"]{color:var(--ink)}

/* ---------- 要点横条 ---------- */
.tips-bar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:40px}
.tips-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.tip{
  padding:24px 20px;font-size:14px;color:var(--ink-soft);
  border-left:1px solid var(--line);
}
.tip:first-child{border-left:0}
.tip strong{display:block;color:var(--ink);font-size:15px;font-weight:700;margin-bottom:4px}

/* ---------- 交替图文 ---------- */
.split{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:56px 0;border-bottom:1px solid var(--line);
}
.split:last-of-type{border-bottom:0}
.split.reverse .split-media{order:-1}
.b-no{
  font-family:var(--font-num);font-size:64px;font-weight:900;line-height:1;
  color:var(--ink);letter-spacing:-.03em;display:block;
}
.b-tag{display:block;font-size:12px;font-weight:400;letter-spacing:.14em;color:var(--muted);margin-top:8px}
.split h3{font-size:clamp(20px,2vw,24px);font-weight:800;line-height:1.35;margin-top:18px}
.split p{margin-top:14px}
.split-media{position:relative}
.split-media img{width:100%;aspect-ratio:4/3;box-shadow:var(--shadow-1)}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;margin-top:20px;
  font-size:14px;font-weight:600;color:var(--brand);
  border-bottom:1px solid transparent;padding-bottom:2px;
}
.link-arrow .arrow{transition:transform .2s ease}
.link-arrow:hover .arrow{transform:translateX(4px)}
.link-arrow:hover{border-bottom-color:var(--brand)}

/* ---------- 对照参考 ---------- */
.ref-table{
  border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--paper);overflow:hidden;box-shadow:var(--shadow-1);
}
.ref-row{
  display:grid;grid-template-columns:180px 1fr 1fr;
  gap:24px;padding:20px 24px;border-bottom:1px solid var(--line);
  font-size:15px;align-items:start;
}
.ref-row:last-child{border-bottom:0}
.ref-head{background:var(--paper-2);font-size:13px;letter-spacing:.08em;color:var(--muted);font-weight:700}
.ref-key{color:var(--ink);font-weight:700}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);margin-top:8px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0;background:none;border:0;cursor:pointer;text-align:left;
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.6;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--brand)}
.faq-item.open .faq-q{color:var(--brand)}
.sign{
  position:relative;flex:0 0 18px;width:18px;height:18px;
}
.sign::before,.sign::after{
  content:"";position:absolute;left:50%;top:50%;background:currentColor;border-radius:2px;
  transform:translate(-50%,-50%);
}
.sign::before{width:14px;height:2px}
.sign::after{width:2px;height:14px;transition:transform .28s ease}
.faq-item.open .sign::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s cubic-bezier(.22,.61,.36,1)}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a > div{overflow:hidden}
.faq-a p{padding:0 0 20px;font-size:15px;line-height:1.85;color:var(--ink-soft);max-width:820px}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  background-image:linear-gradient(rgba(14,21,18,.78),rgba(14,21,18,.78)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  padding:56px 72px;margin:96px 0;
  display:flex;align-items:center;justify-content:space-between;gap:40px;
}
.cta-band h2{color:#F7F5EF;font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.25}
.cta-band p{color:rgba(247,245,239,.78);font-size:14px;margin-top:14px;max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex:0 0 auto}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--deep);color:rgba(247,245,239,.72);padding:64px 0 28px;margin-top:40px}
.f-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.f-brand{font-size:19px;font-weight:900;color:#F7F5EF;display:inline-flex;align-items:baseline}
.f-brand em{font-style:normal;font-size:13px;font-weight:700;color:var(--accent);margin-left:6px}
.f-desc{font-size:14px;margin-top:14px;line-height:1.8;max-width:320px}
.f-site{display:inline-block;margin-top:16px;font-size:14px;color:var(--accent);border-bottom:1px solid rgba(201,242,77,.4)}
.f-site:hover{color:var(--accent);border-bottom-color:var(--accent)}
.f-title{font-size:15px;font-weight:700;color:#F7F5EF;margin-bottom:18px}
.f-list li{margin-bottom:12px}
.f-link{position:relative;font-size:14px;color:rgba(247,245,239,.72);padding-left:14px;display:inline-block;transition:color .2s ease,transform .2s ease}
.f-link::before{
  content:"";position:absolute;left:0;top:8px;width:4px;height:4px;border-radius:999px;
  background:rgba(247,245,239,.4);transition:background-color .2s ease;
}
.f-link:hover{color:#F7F5EF;transform:translateX(4px)}
.f-link:hover::before{background:var(--accent)}
.f-bottom{
  margin-top:48px;padding-top:20px;border-top:1px solid rgba(247,245,239,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(247,245,239,.62);
}
.f-bottom a{color:rgba(247,245,239,.74)}
.f-bottom a:hover{color:var(--accent)}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .wrap{max-width:960px}
  .mega-panel{width:700px}
  .split{gap:40px}
}
@media (max-width:1023px){
  .nav{display:none}
  .nav-side .btn{display:none}
  .hamburger{display:flex}
  .hero-inner{padding:44px 28px}
  .tips-grid{grid-template-columns:repeat(2,1fr)}
  .tip:nth-child(3){border-left:0}
  .split{grid-template-columns:1fr;gap:28px;padding:48px 0}
  .split.reverse .split-media{order:0}
  .cta-band{flex-direction:column;align-items:flex-start;padding:44px 32px}
  .cta-actions{width:100%}
  .f-grid{grid-template-columns:1fr 1fr;gap:32px}
  .ref-row{grid-template-columns:140px 1fr;gap:16px}
  .ref-row .ref-cell-3{grid-column:1 / -1;color:var(--muted)}
}
@media (max-width:767px){
  body{font-size:15px}
  .wrap{padding:0 20px}
  .section{padding:56px 0}
  .section.tight{padding:48px 0}
  main{padding-top:16px}
  .hero{min-height:280px}
  .hero-inner{padding:36px 22px}
  .hero p{font-size:16px}
  .hero-actions .btn{width:100%}
  .tips-grid{grid-template-columns:1fr 1fr}
  .tip{padding:18px 14px;border-left:0;border-top:1px solid var(--line)}
  .tip:nth-child(1),.tip:nth-child(2){border-top:0}
  .ref-row{grid-template-columns:1fr;gap:6px;padding:18px}
  .ref-row .ref-cell-3{grid-column:auto}
  .ref-head{display:none}
  .cta-band{padding:36px 22px;margin:56px 0;border-radius:var(--r-card)}
  .cta-actions .btn{width:100%}
  .f-grid{grid-template-columns:1fr;gap:28px}
  .f-bottom{flex-direction:column}
  .mega-panel{display:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --ink:#131512;
  --ink-soft:#3A3F38;
  --muted:#6E726A;
  --paper:#F7F5EF;
  --paper-2:#EFEBE1;
  --line:#DFD9CC;
  --brand:#14524A;
  --brand-2:#1E6E62;
  --accent:#C9F24D;
  --deep:#0E1512;
  --danger:#A33A2B;
  --r-btn:6px;
  --r-card:12px;
  --r-lg:18px;
  --shadow-1:0 1px 2px rgba(19,21,18,.04),0 8px 24px -12px rgba(19,21,18,.12);
  --shadow-2:0 2px 4px rgba(19,21,18,.06),0 16px 40px -16px rgba(19,21,18,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-soft);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;border-radius:var(--r-card);object-fit:cover}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,p{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(247,245,239,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:background-color .24s var(--ease);
}
.header-inner{display:flex;align-items:center;height:72px;gap:32px;transition:height .24s var(--ease)}
.site-header.compact .header-inner{height:64px}
.brand{display:flex;align-items:baseline;font-size:19px;font-weight:900;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.brand em{font-style:normal;font-size:12px;font-weight:500;letter-spacing:.14em;color:var(--brand);margin-left:8px}
.nav{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav-link{position:relative;padding:6px 0;font-size:15px;font-weight:500;color:var(--ink-soft);transition:color .2s var(--ease)}
.nav-link::after{content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;border-radius:2px;background:var(--brand);transform:translateX(-50%);transition:width .24s var(--ease)}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{width:20px}
.nav-link.active{color:var(--ink);font-weight:700}
.nav-link.active::after{width:20px}
.header-cta{margin-left:36px;flex:none}
.burger{
  display:none;margin-left:auto;width:44px;height:44px;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line);border-radius:var(--r-btn);cursor:pointer;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.burger:hover{border-color:var(--brand);background:var(--paper-2)}
.burger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.drawer{
  position:fixed;left:0;right:0;top:72px;bottom:0;z-index:60;
  background:var(--paper);padding:24px 24px 32px;
  display:flex;flex-direction:column;
  transform:translateX(102%);
  transition:transform .3s var(--ease);
}
.drawer.open{transform:translateX(0)}
.drawer-link{padding:16px 0;font-size:20px;font-weight:700;color:var(--ink);border-bottom:1px solid var(--line);transition:color .2s var(--ease)}
.drawer-link:hover{color:var(--brand)}
.drawer-link.active{color:var(--brand)}
.drawer-cta{margin-top:auto}

/* ---------- 按钮 ---------- */
.btn{
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;overflow:hidden;
  transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn-primary{background:var(--brand);color:#F7F5EF}
.btn-primary::before{content:"";position:absolute;inset:0;background:var(--brand-2);transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);z-index:0}
.btn-primary span{position:relative;z-index:1}
.btn-primary:hover::before{transform:scaleX(1)}
.btn-primary:hover{transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{border-color:var(--brand);color:var(--brand);background:transparent}
.btn-ghost:hover{background:var(--brand);color:#F7F5EF}
.btn-ghost:active{transform:translateY(1px)}
.btn:disabled{background:var(--line);color:var(--muted);border-color:var(--line);cursor:not-allowed;transform:none}
.btn-sm{height:40px;padding:0 20px;font-size:14px}

/* ---------- 首屏 ---------- */
.hero{padding:64px 0 56px;border-bottom:1px solid var(--line)}
.crumbs{margin-bottom:26px}
.crumbs ol{display:flex;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.crumbs li{display:flex;align-items:center}
.crumbs li:not(:last-child)::after{content:"/";margin:0 8px;color:#C6BFB0}
.crumbs a{transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--brand)}
.eyebrow{font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--brand);margin-bottom:18px}
.hero h1{
  font-size:clamp(30px,4.4vw,52px);font-weight:900;line-height:1.08;
  letter-spacing:-.02em;color:var(--ink);max-width:17em;
}
.hero-sub{margin-top:18px;font-size:17px;color:var(--ink-soft);max-width:36em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-lines{display:flex;flex-wrap:wrap;margin-top:30px;font-size:14px;color:var(--muted)}
.hero-lines span{display:inline-flex;align-items:center}
.hero-lines span+span::before{content:"";width:1px;height:12px;background:var(--line);margin:0 14px}

/* ---------- 通用板块 ---------- */
.sec{padding:96px 0}
.sec+.sec{border-top:1px solid var(--line)}
.sec-head{padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:44px}
.sec-title{
  display:flex;align-items:center;gap:12px;
  font-size:clamp(24px,3vw,36px);font-weight:800;line-height:1.2;
  letter-spacing:-.01em;color:var(--ink);
}
.sec-title::before{content:"";flex:none;width:3px;height:24px;border-radius:2px;background:var(--brand)}
.sec-lead{margin-top:16px;font-size:16px;color:var(--muted);max-width:46em}

/* ---------- 编号清单 ---------- */
.flow-list{border-top:1px solid var(--line)}
.flow-item{
  display:grid;grid-template-columns:132px 1fr;gap:32px;align-items:start;
  padding:34px 0;border-bottom:1px solid var(--line);
  transition:padding-left .24s var(--ease),background-color .24s var(--ease);
}
.flow-item:hover{padding-left:8px;background:linear-gradient(90deg,rgba(20,82,74,.04),rgba(20,82,74,0) 60%)}
.flow-num{font-size:64px;font-weight:900;line-height:.9;letter-spacing:-.04em;color:var(--ink)}
.flow-num span{display:block;margin-top:10px;font-size:12px;font-weight:400;letter-spacing:.14em;color:var(--muted)}
.flow-body h3{font-size:19px;font-weight:700;line-height:1.35;color:var(--ink);margin-bottom:10px}
.flow-body p{font-size:15.5px;color:var(--ink-soft);max-width:54em}
.flow-body p+p{margin-top:8px}

/* ---------- 图文块 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split-media img{width:100%;aspect-ratio:4/3;box-shadow:var(--shadow-1)}
.split-body h3{font-size:22px;font-weight:800;line-height:1.3;color:var(--ink);margin-bottom:16px}
.split-body p{font-size:15.5px;color:var(--ink-soft)}
.split-body p+p{margin-top:12px}
.split-body ul{margin-top:18px}
.split-body li{
  position:relative;padding:12px 0 12px 20px;border-bottom:1px solid var(--line);
  font-size:15px;color:var(--ink-soft);transition:color .2s var(--ease),transform .2s var(--ease);
}
.split-body li::before{content:"";position:absolute;left:0;top:50%;width:6px;height:6px;border-radius:999px;background:var(--paper-2);transform:translateY(-50%);transition:background-color .2s var(--ease)}
.split-body li:hover{color:var(--brand);transform:translateX(4px)}
.split-body li:hover::before{background:var(--accent)}

/* ---------- FAQ ---------- */
.faq-group+.faq-group{margin-top:52px}
.faq-group h3{
  display:flex;align-items:center;gap:10px;
  font-size:20px;font-weight:700;color:var(--ink);margin-bottom:6px;
}
.faq-group h3::before{content:"";width:8px;height:8px;border-radius:999px;background:var(--accent)}
.faq-group .group-note{font-size:13.5px;color:var(--muted);margin-bottom:16px}
details{border-bottom:1px solid var(--line)}
summary{
  position:relative;cursor:pointer;list-style:none;
  padding:18px 46px 18px 0;font-size:17px;font-weight:600;color:var(--ink);
  transition:color .2s var(--ease);
}
summary::-webkit-details-marker{display:none}
summary:hover{color:var(--brand)}
summary::after{
  content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--muted);line-height:1;
  transition:transform .26s var(--ease),color .2s var(--ease);
}
details[open] summary{color:var(--brand)}
details[open] summary::after{content:"−";color:var(--brand);transform:translateY(-50%) rotate(180deg)}
.faq-body{padding:0 46px 20px 0}
.faq-body p{font-size:15px;line-height:1.85;color:var(--ink-soft)}
.faq-body p+p{margin-top:10px}

/* ---------- 文字 CTA 带 ---------- */
.text-cta{padding:56px 0;text-align:center}
.text-cta p{font-size:15px;color:var(--muted);margin-bottom:18px}
.text-cta a{
  position:relative;display:inline-flex;align-items:center;gap:10px;
  padding-bottom:6px;font-size:17px;font-weight:700;color:var(--brand);
}
.text-cta a::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);
}
.text-cta a:hover::after{transform:scaleX(1)}
.text-cta svg{transition:transform .24s var(--ease)}
.text-cta a:hover svg{transform:translateX(4px)}

/* ---------- 深色 CTA 带 ---------- */
.cta-wrap{padding:0 0 96px}
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  padding:56px 64px;
  background:var(--deep) url(/assets/images/backpic/back-2.png) center center/cover no-repeat;
  display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;
}
.cta-band::before{content:"";position:absolute;inset:0;background:rgba(14,21,18,.76)}
.cta-band>*{position:relative;z-index:1}
.cta-band h2{font-size:clamp(24px,2.6vw,34px);font-weight:800;line-height:1.25;color:#F7F5EF;letter-spacing:-.01em}
.cta-band .cta-note{margin-top:14px;font-size:14px;color:rgba(247,245,239,.78);max-width:34em}
.cta-form{display:flex;gap:12px}
.cta-form input{
  flex:1;height:48px;padding:0 16px;border-radius:var(--r-btn);
  border:1px solid rgba(247,245,239,.28);
  background:rgba(247,245,239,.08);color:#F7F5EF;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease);
}
.cta-form input::placeholder{color:rgba(247,245,239,.5)}
.cta-form input:focus{outline:none;border-color:var(--accent);background:rgba(247,245,239,.12);box-shadow:0 0 0 3px rgba(201,242,77,.22)}
.cta-form .btn{height:48px;flex:none}
.form-note{margin-top:14px;font-size:13px;color:rgba(247,245,239,.55)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--deep);color:rgba(247,245,239,.72);padding:64px 0 0;margin-top:0}
.f-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.f-brand{font-size:20px;font-weight:900;letter-spacing:-.01em;color:#F7F5EF}
.f-brand em{font-style:normal;font-size:12px;font-weight:500;letter-spacing:.14em;color:var(--accent);margin-left:6px}
.f-desc{margin-top:14px;font-size:14px;line-height:1.8;color:rgba(247,245,239,.62);max-width:26em}
.f-site{display:inline-block;margin-top:16px;font-size:13px;color:rgba(247,245,239,.6);border-bottom:1px solid rgba(247,245,239,.24);transition:color .2s var(--ease),border-color .2s var(--ease)}
.f-site:hover{color:var(--accent);border-color:var(--accent)}
.f-title{font-size:13px;font-weight:700;letter-spacing:.14em;color:#F7F5EF;margin-bottom:16px}
.f-list li a{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  padding:6px 0;font-size:14px;color:rgba(247,245,239,.72);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.f-list li a::before{
  content:"";width:4px;height:4px;border-radius:999px;background:rgba(247,245,239,.28);
  transition:background-color .2s var(--ease);
}
.f-list li a:hover{color:#F7F5EF;transform:translateX(3px)}
.f-list li a:hover::before{background:var(--accent)}
.f-bottom{
  margin-top:48px;padding:20px 0 24px;border-top:1px solid rgba(247,245,239,.12);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:rgba(247,245,239,.58);
}
.f-bottom a{color:rgba(247,245,239,.78);border-bottom:1px solid rgba(247,245,239,.22)}
.f-bottom a:hover{color:var(--accent);border-color:var(--accent)}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s var(--ease),transform .48s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .wrap{max-width:960px}
  .split{gap:40px}
}
@media (max-width:1023px){
  .nav,.header-cta{display:none}
  .burger{display:inline-flex}
  .sec{padding:72px 0}
  .hero{padding:56px 0 44px}
  .flow-item{grid-template-columns:104px 1fr;gap:22px;padding:28px 0}
  .flow-num{font-size:52px}
  .split{grid-template-columns:1fr;gap:28px}
  .split-media{order:-1}
  .cta-band{grid-template-columns:1fr;gap:28px;padding:40px 32px}
  .cta-form{flex-direction:column}
  .cta-form .btn{width:100%}
  .f-grid{grid-template-columns:1fr 1fr;gap:36px}
  .cta-wrap{padding-bottom:72px}
}
@media (max-width:767px){
  .wrap{padding:0 20px}
  .sec{padding:56px 0}
  .hero{padding:44px 0 36px}
  .hero-actions .btn{width:100%}
  .hero-lines{flex-direction:column;gap:10px}
  .hero-lines span+span::before{display:none}
  .flow-item{grid-template-columns:1fr;gap:10px;padding:24px 0}
  .flow-item:hover{padding-left:0;background:none}
  .flow-num{font-size:44px}
  .flow-num span{display:inline-block;margin:0 0 0 10px}
  .sec-title::before{height:20px}
  .cta-band{padding:32px 22px;border-radius:14px}
  .text-cta{padding:44px 0}
  .f-grid{grid-template-columns:1fr;gap:30px}
  .f-bottom{flex-direction:column;gap:8px}
}
@media (max-width:519px){
  .brand{font-size:17px}
  .brand em{display:none}
  .hero h1{font-size:28px}
  .hero-sub{font-size:15.5px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category2 */
:root{
    --ink:#131512;
    --ink-soft:#3A3F38;
    --muted:#6E726A;
    --paper:#F7F5EF;
    --paper-2:#EFEBE1;
    --line:#DFD9CC;
    --brand:#14524A;
    --brand-2:#1E6E62;
    --accent:#C9F24D;
    --deep:#0E1512;
    --danger:#A33A2B;
    --r-btn:6px;
    --r-card:12px;
    --r-lg:18px;
    --shadow-1:0 1px 2px rgba(19,21,18,.04),0 8px 24px -12px rgba(19,21,18,.12);
    --shadow-2:0 2px 4px rgba(19,21,18,.06),0 16px 40px -16px rgba(19,21,18,.18);
    --ease:cubic-bezier(.22,.61,.36,1);
    --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    --font-num:"Space Grotesk","Inter","SFMono-Regular",system-ui,-apple-system,sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border-radius:var(--r-card);object-fit:cover;}
  a{color:inherit;text-decoration:none;}
  button,input{font:inherit;color:inherit;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}
  ::selection{background:var(--accent);color:var(--ink);}

  a:focus-visible,
  button:focus-visible,
  input:focus-visible,
  [tabindex]: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;
  }

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:80;
    background:rgba(247,245,239,0);
    border-bottom:1px solid transparent;
    transition:height .24s var(--ease),background .24s var(--ease),border-color .24s var(--ease),backdrop-filter .24s var(--ease);
  }
  .header-inner{
    min-height:72px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:24px;
    transition:min-height .24s var(--ease);
  }
  .site-header.scrolled{
    background:rgba(247,245,239,.92);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
  }
  .site-header.scrolled .header-inner{min-height:64px;}

  .brand{
    display:inline-flex;
    align-items:baseline;
    gap:6px;
    font-size:19px;
    font-weight:900;
    letter-spacing:-.01em;
    color:var(--ink);
    white-space:nowrap;
  }
  .brand em{
    font-style:normal;
    font-size:13px;
    font-weight:600;
    letter-spacing:.08em;
    color:var(--brand);
  }

  .nav{
    display:flex;
    align-items:center;
    gap:28px;
  }
  .nav-link{
    position:relative;
    font-size:15px;
    font-weight:600;
    color:var(--ink-soft);
    padding:6px 0;
    transition:color .2s var(--ease);
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:50%;
    bottom:-2px;
    width:0;
    height:2px;
    background:var(--brand);
    transform:translateX(-50%);
    transition:width .2s var(--ease);
  }
  .nav-link:hover{color:var(--brand);}
  .nav-link:hover::after{width:20px;}
  .nav-link.active{color:var(--ink);font-weight:800;}
  .nav-link.active::after{width:20px;}

  .header-tools{
    display:flex;
    align-items:center;
    gap:12px;
  }

  .mega-wrap{position:relative;}
  .mega-trigger{
    display:inline-flex;
    align-items:center;
    gap:8px;
    height:40px;
    padding:0 14px;
    background:transparent;
    border:1px solid var(--line);
    border-radius:var(--r-btn);
    font-size:14px;
    font-weight:600;
    color:var(--ink-soft);
    cursor:pointer;
    transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
  }
  .mega-trigger:hover{border-color:var(--brand);color:var(--brand);background:var(--paper-2);}
  .caret{
    width:7px;height:7px;
    border-right:1.6px solid currentColor;
    border-bottom:1.6px solid currentColor;
    transform:rotate(45deg) translateY(-2px);
    transition:transform .2s var(--ease);
  }
  .mega-wrap.open .caret,
  .mega-wrap:hover .caret{transform:rotate(225deg) translateY(-2px);}

  .mega-panel{
    position:absolute;
    top:calc(100% + 12px);
    right:0;
    width:780px;
    padding:28px;
    background:var(--paper);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--shadow-2);
    display:grid;
    grid-template-columns:1.1fr 1fr 1fr;
    gap:24px;
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
  }
  .mega-wrap:hover .mega-panel,
  .mega-wrap:focus-within .mega-panel,
  .mega-wrap.open .mega-panel{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }
  .mega-col-title{
    font-size:12px;
    letter-spacing:.14em;
    font-weight:700;
    color:var(--brand);
    margin-bottom:14px;
  }
  .mega-item{
    display:flex;
    align-items:center;
    gap:10px;
    padding:8px 0;
    font-size:14px;
    color:var(--ink-soft);
    transition:color .18s var(--ease),transform .18s var(--ease);
  }
  .mega-item .dot{
    width:4px;height:4px;
    border-radius:999px;
    background:var(--brand);
    flex:none;
    transition:transform .18s var(--ease);
  }
  .mega-item:hover{color:var(--brand);transform:translateX(3px);}
  .mega-item:hover .dot{transform:scale(1.3);}
  .mega-meta{font-size:12px;color:var(--muted);margin-top:2px;}
  .mega-card{
    display:block;
    border:1px solid var(--line);
    border-radius:var(--r-card);
    overflow:hidden;
    background:var(--paper-2);
    transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .mega-card:hover{border-color:var(--brand);box-shadow:var(--shadow-1);}
  .mega-card img{aspect-ratio:4/3;width:100%;border-radius:0;}
  .mega-card-body{padding:12px 14px 14px;}
  .mega-card-body p{font-size:14px;font-weight:700;line-height:1.4;}
  .mega-card-body span{font-size:12px;color:var(--brand);font-weight:600;}

  .menu-toggle{
    display:none;
    height:40px;
    padding:0 14px;
    background:transparent;
    border:1px solid var(--line);
    border-radius:var(--r-btn);
    font-size:14px;
    font-weight:700;
    cursor:pointer;
  }

  /* 按钮 */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    height:44px;
    padding:0 28px;
    border-radius:var(--r-btn);
    border:1px solid transparent;
    font-size:15px;
    font-weight:600;
    cursor:pointer;
    position:relative;
    overflow:hidden;
    transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .btn-sm{height:40px;padding:0 18px;font-size:14px;}
  .btn-lg{height:52px;padding:0 32px;}
  .btn-primary{background:var(--brand);color:var(--paper);}
  .btn-primary::before{
    content:"";
    position:absolute;
    inset:0;
    background:var(--brand-2);
    transform:scaleX(0);
    transform-origin:left center;
    transition:transform .2s var(--ease);
    z-index:0;
  }
  .btn-primary:hover::before{transform:scaleX(1);}
  .btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow-1);}
  .btn-primary:active{transform:translateY(1px);}
  .btn-primary span,.btn-primary{position:relative;}
  .btn-primary > *{position:relative;z-index:1;}
  .btn-ghost{
    background:transparent;
    border-color:var(--brand);
    color:var(--brand);
  }
  .btn-ghost:hover{background:var(--brand);color:var(--paper);transform:translateY(-1px);}
  .btn-ghost-light{
    background:transparent;
    border-color:rgba(247,245,239,.5);
    color:var(--paper);
  }
  .btn-ghost-light:hover{background:var(--paper);color:var(--deep);border-color:var(--paper);}
  .btn-disabled,
  .btn:disabled{
    background:var(--line);
    color:var(--muted);
    border-color:var(--line);
    cursor:not-allowed;
    box-shadow:none;
    transform:none;
  }
  .btn-disabled::before{display:none;}
  .btn .spin{
    width:14px;height:14px;
    border:2px solid rgba(247,245,239,.35);
    border-top-color:var(--paper);
    border-radius:999px;
    animation:spin .8s linear infinite;
  }
  @keyframes spin{to{transform:rotate(360deg);}}

  /* 移动抽屉 */
  .drawer{
    position:fixed;
    inset:72px 0 0 0;
    z-index:70;
    background:var(--paper);
    padding:24px;
    display:none;
    flex-direction:column;
    gap:8px;
    overflow-y:auto;
  }
  .drawer.open{display:flex;}
  .drawer-link{
    font-size:20px;
    font-weight:700;
    padding:14px 0;
    border-bottom:1px solid var(--line);
    display:flex;
    justify-content:space-between;
    align-items:center;
  }
  .drawer-link.active{color:var(--brand);}
  .drawer-group-title{
    font-size:12px;
    letter-spacing:.14em;
    color:var(--brand);
    font-weight:700;
    margin:20px 0 6px;
  }
  .drawer-sub{
    display:block;
    font-size:15px;
    color:var(--ink-soft);
    padding:12px 0;
    border-bottom:1px solid var(--line);
    min-height:44px;
  }
  .drawer-cta{margin-top:auto;padding-top:24px;}

  /* ---------- 通用区块 ---------- */
  .section{padding:96px 0;}
  .section-tight{padding:64px 0;}
  .sec-head{margin-bottom:40px;}
  .sec-title{
    position:relative;
    font-size:clamp(24px,3vw,36px);
    font-weight:800;
    line-height:1.2;
    letter-spacing:-.01em;
    padding-left:16px;
  }
  .sec-title::before{
    content:"";
    position:absolute;
    left:0;top:6px;
    width:3px;height:24px;
    background:var(--brand);
    border-radius:2px;
  }
  .sec-rule{
    height:1px;
    background:var(--line);
    margin:16px 0 0;
  }
  .sec-lead{
    margin-top:18px;
    max-width:720px;
    color:var(--ink-soft);
    font-size:16px;
  }
  .eyebrow{
    display:inline-block;
    font-size:12px;
    letter-spacing:.14em;
    font-weight:700;
    color:var(--brand);
    margin-bottom:14px;
  }

  /* ---------- 分类页 Hero（极简浅色） ---------- */
  .cat-hero{
    padding:88px 0 56px;
    background:
      radial-gradient(900px 320px at 88% -10%,rgba(201,242,77,.18),transparent 70%),
      var(--paper);
    border-bottom:1px solid var(--line);
  }
  .crumbs{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--muted);
    margin-bottom:26px;
  }
  .crumbs a{transition:color .2s var(--ease);}
  .crumbs a:hover{color:var(--brand);}
  .crumbs li::after{content:"/";margin-left:8px;color:var(--line);}
  .crumbs li:last-child::after{content:"";margin:0;}
  .crumbs li:last-child{color:var(--ink-soft);}
  .cat-hero h1{
    font-size:clamp(30px,4.2vw,52px);
    font-weight:900;
    line-height:1.14;
    letter-spacing:-.02em;
    max-width:860px;
  }
  .cat-hero .lead{
    margin-top:20px;
    max-width:680px;
    font-size:17px;
    color:var(--ink-soft);
  }
  .hero-badges{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin-top:28px;
  }
  .badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:4px 10px;
    background:var(--paper-2);
    color:var(--ink);
    border-radius:999px;
    font-size:12px;
    font-weight:600;
    line-height:1.6;
  }
  .badge-accent{background:var(--accent);color:var(--ink);}

  /* 要点横条 */
  .facts-bar{
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    background:var(--paper);
  }
  .facts-inner{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:0;
  }
  .fact{
    padding:22px 24px;
    font-size:14px;
    font-weight:600;
    color:var(--ink-soft);
    display:flex;
    align-items:center;
    gap:10px;
    border-left:1px solid var(--line);
  }
  .fact:first-child{border-left:none;}
  .fact i{
    width:6px;height:6px;
    border-radius:999px;
    background:var(--brand);
    flex:none;
  }

  /* ---------- 主内容：索引 + 卡片矩阵 ---------- */
  .cat-layout{
    display:grid;
    grid-template-columns:220px minmax(0,1fr);
    gap:48px;
    align-items:start;
  }
  .side-index{
    position:sticky;
    top:104px;
    border-left:1px solid var(--line);
    padding-left:18px;
  }
  .index-title{
    font-size:12px;
    letter-spacing:.14em;
    font-weight:700;
    color:var(--brand);
    margin-bottom:14px;
  }
  .index-link{
    display:block;
    font-size:14px;
    color:var(--muted);
    padding:9px 0 9px 12px;
    margin-left:-19px;
    border-left:2px solid transparent;
    transition:color .2s var(--ease),border-color .2s var(--ease),padding-left .2s var(--ease);
  }
  .index-link:hover{color:var(--brand);padding-left:16px;}
  .index-link.current{color:var(--ink);font-weight:700;border-left-color:var(--brand);background:linear-gradient(90deg,rgba(20,82,74,.06),transparent);}

  .group{
    scroll-margin-top:104px;
    padding-bottom:56px;
    margin-bottom:56px;
    border-bottom:1px solid var(--line);
  }
  .group:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0;}
  .group-head{margin-bottom:28px;}
  .group-num{
    font-family:var(--font-num);
    font-size:13px;
    font-weight:400;
    letter-spacing:.14em;
    color:var(--muted);
    margin-bottom:10px;
  }
  .group-title{
    font-size:clamp(20px,2.2vw,26px);
    font-weight:800;
    line-height:1.3;
  }
  .group-desc{
    margin-top:12px;
    max-width:640px;
    color:var(--ink-soft);
    font-size:15px;
  }

  .card-matrix{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:24px;
  }
  .v-card{
    display:flex;
    flex-direction:column;
    background:var(--paper);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--shadow-1);
    overflow:hidden;
    transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
  }
  .v-card:hover{
    transform:translateY(-3px);
    box-shadow:var(--shadow-2);
    border-color:var(--brand);
  }
  .v-card img{
    width:100%;
    aspect-ratio:4/3;
    border-radius:0;
  }
  .v-card-body{padding:24px;display:flex;flex-direction:column;flex:1;}
  .v-card h3{
    font-size:19px;
    font-weight:700;
    line-height:1.35;
  }
  .v-card p{
    margin-top:8px;
    font-size:14.5px;
    color:var(--ink-soft);
    line-height:1.75;
  }
  .v-card-foot{
    margin-top:16px;
    padding-top:16px;
    border-top:1px dashed var(--line);
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
  }
  .arrow-link{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:14px;
    font-weight:700;
    color:var(--brand);
  }
  .arrow-link i{
    font-style:normal;
    transition:transform .2s var(--ease);
  }
  .arrow-link:hover i{transform:translateX(4px);}

  /* ---------- 顺序清单 ---------- */
  .seq-list{
    border-top:1px solid var(--line);
  }
  .seq-item{
    display:grid;
    grid-template-columns:104px minmax(0,1fr);
    gap:24px;
    padding:32px 0;
    border-bottom:1px solid var(--line);
    transition:background .2s var(--ease),padding-left .2s var(--ease);
  }
  .seq-item:hover{background:var(--paper-2);padding-left:12px;}
  .seq-num{
    font-family:var(--font-num);
    font-size:56px;
    font-weight:900;
    line-height:1;
    color:var(--brand);
    letter-spacing:-.03em;
  }
  .seq-item h3{font-size:19px;font-weight:700;line-height:1.35;}
  .seq-item p{margin-top:8px;color:var(--ink-soft);font-size:15px;max-width:760px;}

  /* ---------- FAQ ---------- */
  .faq-list{border-top:1px solid var(--line);}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    padding:20px 0;
    background:transparent;
    border:none;
    text-align:left;
    font-size:17px;
    font-weight:600;
    color:var(--ink);
    cursor:pointer;
    transition:color .2s var(--ease);
  }
  .faq-q:hover{color:var(--brand);}
  .faq-item.open .faq-q{color:var(--brand);}
  .faq-icon{
    position:relative;
    width:18px;height:18px;
    flex:none;
    transition:transform .24s var(--ease);
  }
  .faq-icon::before,
  .faq-icon::after{
    content:"";
    position:absolute;
    background:currentColor;
    border-radius:2px;
  }
  .faq-icon::before{left:0;top:8px;width:18px;height:1.8px;}
  .faq-icon::after{left:8px;top:0;width:1.8px;height:18px;transition:opacity .24s var(--ease);}
  .faq-item.open .faq-icon{transform:rotate(90deg);}
  .faq-item.open .faq-icon::after{opacity:0;}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .3s var(--ease);
  }
  .faq-a p{
    padding:0 0 20px;
    font-size:15px;
    line-height:1.85;
    color:var(--ink-soft);
    max-width:800px;
  }

  /* ---------- CTA 带 ---------- */
  .cta-band{
    position:relative;
    margin:0 0 96px;
  }
  .cta-inner{
    position:relative;
    border-radius:var(--r-lg);
    overflow:hidden;
    padding:64px 72px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:40px;
    background-image:
      linear-gradient(rgba(14,21,18,.8),rgba(14,21,18,.8)),
      url("/assets/images/backpic/back-2.png");
    background-size:cover;
    background-position:center;
    color:var(--paper);
  }
  .cta-inner h2{
    font-size:clamp(22px,2.6vw,32px);
    font-weight:800;
    line-height:1.25;
    letter-spacing:-.01em;
  }
  .cta-inner p{
    margin-top:14px;
    font-size:14px;
    color:rgba(247,245,239,.72);
    max-width:560px;
  }
  .cta-actions{
    display:flex;
    gap:14px;
    flex:none;
  }

  /* ---------- 页脚 ---------- */
  .site-footer{
    background:var(--deep);
    color:var(--paper);
    padding:72px 0 28px;
  }
  .f-grid{
    display:grid;
    grid-template-columns:1.6fr 1fr 1fr 1fr;
    gap:32px;
  }
  .f-brand{
    font-size:22px;
    font-weight:700;
    letter-spacing:-.01em;
  }
  .f-brand em{
    font-style:normal;
    font-size:13px;
    font-weight:600;
    color:var(--accent);
    margin-left:8px;
    letter-spacing:.08em;
  }
  .f-desc{
    margin-top:16px;
    font-size:14px;
    line-height:1.8;
    color:rgba(247,245,239,.72);
    max-width:340px;
  }
  .f-site{
    display:inline-block;
    margin-top:16px;
    font-size:13px;
    color:rgba(247,245,239,.72);
    border-bottom:1px solid rgba(247,245,239,.3);
    transition:color .2s var(--ease),border-color .2s var(--ease);
  }
  .f-site:hover{color:var(--accent);border-color:var(--accent);}
  .f-title{
    font-size:14px;
    font-weight:700;
    margin-bottom:16px;
  }
  .f-link{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:14px;
    color:rgba(247,245,239,.72);
    padding:7px 0;
    transition:color .2s var(--ease),padding-left .2s var(--ease);
  }
  .f-link::before{
    content:"";
    width:0;height:0;
    border-radius:999px;
    background:var(--accent);
    transition:width .2s var(--ease),height .2s var(--ease);
    flex:none;
  }
  .f-link:hover{color:var(--paper);}
  .f-link:hover::before{width:6px;height:6px;}
  .f-bottom{
    margin-top:48px;
    padding-top:20px;
    border-top:1px solid rgba(247,245,239,.14);
    display:flex;
    justify-content:space-between;
    gap:16px;
    flex-wrap:wrap;
    font-size:13px;
    color:rgba(247,245,239,.6);
  }
  .f-bottom a{color:rgba(247,245,239,.78);border-bottom:1px solid rgba(247,245,239,.3);}
  .f-bottom a:hover{color:var(--accent);border-color:var(--accent);}

  /* ---------- 入场动效 ---------- */
  .reveal{
    opacity:0;
    transform:translateY(12px);
    transition:opacity .48s var(--ease),transform .48s var(--ease);
  }
  .reveal.in{opacity:1;transform:none;}

  /* ---------- 响应式 ---------- */
  @media (max-width:1279px){
    .wrap{max-width:960px;}
    .mega-panel{width:680px;grid-template-columns:1fr 1fr;}
    .mega-col-card{display:none;}
  }
  @media (max-width:1023px){
    .nav{display:none;}
    .menu-toggle{display:inline-flex;align-items:center;}
    .mega-wrap{display:none;}
    .section{padding:72px 0;}
    .cat-layout{grid-template-columns:minmax(0,1fr);gap:28px;}
    .side-index{
      position:static;
      border-left:none;
      padding-left:0;
      border-bottom:1px solid var(--line);
      padding-bottom:12px;
      margin-bottom:8px;
    }
    .index-list{
      display:flex;
      gap:10px;
      overflow-x:auto;
      padding-bottom:6px;
      -webkit-overflow-scrolling:touch;
    }
    .index-link{
      flex:none;
      margin-left:0;
      padding:8px 14px;
      border:1px solid var(--line);
      border-radius:999px;
      background:var(--paper);
      white-space:nowrap;
    }
    .index-link.current{border-color:var(--brand);background:rgba(20,82,74,.07);}
    .index-link:hover{padding-left:14px;}
    .facts-inner{grid-template-columns:1fr 1fr;}
    .fact:nth-child(3){border-left:none;}
    .cta-inner{padding:56px 40px;flex-direction:column;align-items:flex-start;}
    .f-grid{grid-template-columns:1fr 1fr;}
  }
  @media (max-width:767px){
    .wrap{padding:0 20px;}
    .section{padding:56px 0;}
    .cat-hero{padding:64px 0 40px;}
    .card-matrix{grid-template-columns:minmax(0,1fr);}
    .seq-item{grid-template-columns:1fr;gap:12px;padding:24px 0;}
    .seq-num{font-size:44px;}
    .cta-band{margin-bottom:56px;}
    .cta-inner{padding:40px 24px;border-radius:16px;}
    .cta-actions{width:100%;flex-direction:column;}
    .cta-actions .btn{width:100%;}
    .f-grid{grid-template-columns:1fr;gap:28px;}
    .f-bottom{flex-direction:column;gap:8px;}
    .drawer{inset:64px 0 0 0;}
  }
  @media (max-width:520px){
    .facts-inner{grid-template-columns:1fr;}
    .fact{border-left:none;border-top:1px solid var(--line);padding:18px 0;}
    .fact:first-child{border-top:none;}
    .v-card-body{padding:20px;}
    .cat-hero h1{letter-spacing:-.01em;}
    .cat-hero .lead{font-size:15.5px;}
  }

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