/* roulang page: index */
:root{
  --ink:#0F3B36;
  --ink-deep:#092A26;
  --ink-mid:#1C5A50;
  --bamboo:#6FAF9B;
  --mist:#E7F1ED;
  --amber:#D97A2B;
  --amber-hover:#BC6519;
  --dark-bg:#0B2C29;
  --dark-text:#EDF3F0;
  --dark-muted:#A9C0B9;
  --paper:#FAF8F3;
  --paper-2:#F2EFE7;
  --surface:#FFFFFF;
  --line:#E3DED3;
  --text:#1E2826;
  --muted:#5C6A66;
  --disabled:#9AA5A1;
  --ok:#2E8B6B;
  --warn:#C9911F;
  --err:#C0453B;
  --r-chip:999px;
  --r-btn:10px;
  --r-sm:6px;
  --r-card:16px;
  --r-lg:20px;
  --sh-sm:0 1px 2px rgba(15,59,54,.06);
  --sh-md:0 6px 20px rgba(15,59,54,.08);
  --sh-lg:0 16px 40px rgba(15,59,54,.12);
  --ease:220ms cubic-bezier(.2,.7,.3,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --mono:"JetBrains Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--ink);text-decoration:none;transition:color var(--ease),background var(--ease)}
a:hover{color:var(--ink-mid)}
p{margin:0 0 1.15em}
h1,h2,h3,h4{font-family:var(--serif);color:var(--ink);font-weight:700;margin:0;letter-spacing:.01em}
h1{font-size:clamp(30px,3.4vw,46px);line-height:1.28}
h2{font-size:clamp(24px,2.4vw,32px);line-height:1.32;margin:0 0 .9em}
h3{font-size:20px;line-height:1.4;margin:0 0 .6em}
h4{font-size:17px;line-height:1.45}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--amber);outline-offset:2px;
}
.container,.grid-container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.grid-x{margin-left:-14px;margin-right:-14px}
.grid-x>.cell{padding-left:14px;padding-right:14px}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:48px}
.section-head h2{margin-bottom:10px}
.section-label{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--bamboo);margin-bottom:14px;font-family:var(--sans)}
.section-label::before{content:"";width:16px;height:2px;background:var(--amber);border-radius:2px}
.section-intro{color:var(--muted);font-size:16px;max-width:640px;margin:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-family:var(--sans);font-size:16px;font-weight:500;line-height:1;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn-primary{background:var(--amber);color:#fff;box-shadow:0 1px 2px rgba(217,122,43,.28)}
.btn-primary:hover{background:var(--amber-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-primary:active{transform:translateY(0);background:var(--amber-hover)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--mist);color:var(--ink)}
.btn-ghost:active{background:#DCEAE4}
.btn-lg{height:48px;padding:0 28px;font-size:17px}
.btn-sm{height:36px;padding:0 16px;font-size:15px}
.btn-block{width:100%}
.btn.is-disabled,.btn[disabled]{opacity:.45;pointer-events:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:500;color:var(--ink);position:relative;padding-bottom:2px}
.link-arrow::after{content:"→";transition:transform var(--ease);display:inline-block}
.link-arrow:hover::after{transform:translateX(3px)}
.link-arrow::before{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--ink);transition:width var(--ease)}
.link-arrow:hover::before{width:100%}
.link-arrow.on-dark{color:var(--dark-text)}
.link-arrow.on-dark::before{background:var(--dark-text)}
.link-arrow.on-dark:hover{color:#fff}

/* ---------- 标签 ---------- */
.tag{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--r-chip);background:var(--mist);color:var(--ink);font-size:13px;font-weight:500;line-height:1;font-family:var(--sans)}
.tag.on-dark{background:rgba(255,255,255,.16);color:var(--dark-text)}
.tag-amber{background:rgba(217,122,43,.14);color:var(--amber-hover)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(250,248,243,.93);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-md);background:rgba(250,248,243,.97)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;transition:height var(--ease)}
.site-header.is-scrolled .nav-wrap{height:60px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:34px;height:34px;border-radius:9px;background:var(--ink);display:grid;place-items:center;color:#fff;font-family:var(--serif);font-size:15px;position:relative;flex:0 0 auto;box-shadow:var(--sh-sm)}
.brand-mark::after{content:"";position:absolute;inset:4px;border:1px solid rgba(255,255,255,.3);border-radius:5px}
.brand-text{font-family:var(--serif);font-size:18px;font-weight:700;color:var(--ink);white-space:nowrap;letter-spacing:.01em}
.brand-text em{font-style:normal;font-family:var(--sans);font-size:13px;font-weight:400;color:var(--muted);margin-left:8px}
.nav-chips{display:flex;align-items:center;gap:6px}
.chip{
  display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 16px;
  border-radius:var(--r-chip);border:1px solid var(--line);background:transparent;
  color:var(--muted);font-size:15px;line-height:1;white-space:nowrap;
  transition:background var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.chip:hover{background:var(--mist);color:var(--ink);border-color:#CFE0D9}
.chip.is-active{background:var(--ink);border-color:var(--ink);color:#fff;box-shadow:var(--sh-sm)}
.chip.is-active:hover{background:var(--ink-deep);color:#fff}
.nav-cta{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:var(--surface);cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:0;
  transition:background var(--ease),border-color var(--ease);
}
.nav-toggle:hover{background:var(--mist)}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform var(--ease),opacity var(--ease)}
.nav-toggle.is-active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-active span:nth-child(2){opacity:0}
.nav-toggle.is-active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.mobile-nav{
  display:none;border-top:1px solid var(--line);background:var(--paper);
  max-height:0;overflow:hidden;transition:max-height var(--ease);
}
.mobile-nav.is-open{max-height:420px}
.mobile-nav .container{padding-top:12px;padding-bottom:20px}
.mobile-nav a{
  display:block;padding:12px 4px;font-size:16px;color:var(--text);
  border-bottom:1px solid var(--line);
}
.mobile-nav a:hover{color:var(--ink)}
.mobile-nav .m-cta{margin-top:16px;border-bottom:0}

/* ---------- 首屏 ---------- */
.hero{position:relative;padding:80px 0 72px;background:var(--paper);overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(135deg,rgba(15,59,54,.028) 0 1px,transparent 1px 14px);
}
.hero-grid{position:relative;z-index:1;align-items:center;min-height:540px}
.hero-eyebrow{display:inline-flex;align-items:center;gap:10px;height:30px;padding:0 14px;border-radius:var(--r-chip);background:var(--mist);color:var(--ink-mid);font-size:13px;font-weight:500;margin-bottom:22px}
.hero-eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--ok);display:block}
.hero h1{margin-bottom:20px}
.hero h1 span{color:var(--ink-mid)}
.hero-lead{font-size:17.5px;color:var(--muted);max-width:560px;margin-bottom:32px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero-visual{position:relative;padding-right:0}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--sh-md)}
.hero-stat{
  position:absolute;right:-10px;bottom:-22px;display:flex;gap:26px;
  background:var(--mist);border:1px solid #CFE0D9;border-radius:var(--r-card);
  padding:16px 22px;box-shadow:var(--sh-md);
}
.hero-stat div{display:flex;flex-direction:column;line-height:1.3}
.hero-stat strong{font-family:var(--serif);font-size:26px;color:var(--ink);font-variant-numeric:tabular-nums}
.hero-stat span{font-size:13px;color:var(--muted)}

/* ---------- 信任指标 ---------- */
.trust-bar{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:26px 0}
.trust-list{display:flex;align-items:center;justify-content:space-between;gap:24px}
.trust-item{flex:1;text-align:center;position:relative;padding:0 16px}
.trust-item+.trust-item{border-left:1px solid var(--line)}
.trust-item strong{display:block;font-family:var(--serif);font-size:19px;color:var(--ink);margin-bottom:4px}
.trust-item span{font-size:14px;color:var(--muted)}

/* ---------- 深色板块 ---------- */
.dark-band{background:var(--dark-bg);color:var(--dark-text)}
.dark-band h2,.dark-band h3{color:#fff}
.dark-band p{color:var(--dark-muted)}
.dark-band .section-label{color:var(--bamboo)}
.pain-list{margin-top:8px}
.pain-item{display:flex;gap:24px;padding:26px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.pain-item:first-child{padding-top:0}
.pain-item:last-child{border-bottom:0;padding-bottom:0}
.pain-num{font-family:var(--serif);font-size:34px;line-height:1.1;color:var(--bamboo);min-width:52px;font-variant-numeric:tabular-nums}
.pain-item h3{font-size:18px;margin-bottom:6px}
.pain-item p{font-size:15.5px;line-height:1.85;margin:0}

/* ---------- 流程 ---------- */
.flow-steps{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:0;margin-top:8px}
.flow-steps::before{content:"";position:absolute;top:5px;left:8px;right:8px;height:1px;background:var(--line)}
.flow-step{position:relative;padding-right:26px}
.flow-step .dot{display:block;width:11px;height:11px;border-radius:50%;background:var(--ink);box-shadow:0 0 0 6px var(--paper);position:relative;z-index:1;margin-bottom:26px}
.flow-step .step-no{display:block;font-size:12.5px;letter-spacing:.12em;color:var(--bamboo);font-weight:600;margin-bottom:8px;font-family:var(--sans)}
.flow-step h3{font-size:18px;margin-bottom:8px}
.flow-step p{font-size:15px;color:var(--muted);line-height:1.8;margin:0}

/* ---------- 数据带 ---------- */
.metrics{background:var(--mist)}
.metric{text-align:center;padding:8px 12px}
.metric strong{
  display:block;font-family:var(--serif);font-size:clamp(40px,4.4vw,56px);
  color:var(--ink);line-height:1.05;font-variant-numeric:tabular-nums;margin-bottom:10px;
}
.metric span{font-size:14.5px;color:var(--muted)}
.metric+.metric{border-left:1px solid #D3E4DD;padding-left:12px}
.metrics .grid-x>.cell+.cell .metric{border-left:1px solid #D3E4DD}

/* ---------- 卡片 ---------- */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-sm);overflow:hidden;height:100%;
  display:flex;flex-direction:column;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-lg);border-color:rgba(15,59,54,.22)}
.card-body{padding:22px 22px 24px;flex:1;display:flex;flex-direction:column;gap:12px}
.card-title{font-family:var(--serif);font-size:19px;line-height:1.45;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color var(--ease)}
.card:hover .card-title{color:var(--ink-mid)}
.card-text{font-size:15px;color:var(--muted);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0}
.card-meta{margin-top:auto;display:flex;align-items:center;gap:8px;font-size:13px;color:var(--disabled);padding-top:12px;border-top:1px solid var(--line)}
.thumb{overflow:hidden;display:block;aspect-ratio:16/9;background:var(--paper-2)}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms var(--ease)}
.card:hover .thumb img{transform:scale(1.03)}

/* ---------- 证言 ---------- */
.quote-card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:30px 30px 26px;box-shadow:var(--sh-sm);height:100%;display:flex;flex-direction:column}
.quote-card::before{content:"“";position:absolute;top:8px;left:18px;font-family:var(--serif);font-size:64px;line-height:1;color:rgba(111,175,155,.28)}
.quote-card p{position:relative;font-size:16.5px;line-height:1.85;color:var(--text);margin:22px 0 20px}
.quote-card.qsmall p{font-size:15.5px;margin:18px 0 16px}
.quote-card.qbig p{font-size:18px}
.quote-who{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:16px;border-top:1px solid var(--line)}
.avatar{width:40px;height:40px;border-radius:50%;background:var(--ink);color:#fff;display:grid;place-items:center;font-family:var(--serif);font-size:16px;flex:0 0 auto}
.quote-who b{display:block;font-size:15px;color:var(--ink);font-weight:500}
.quote-who span{font-size:13px;color:var(--muted)}

/* ---------- 资讯列表 ---------- */
.post-row{display:flex;gap:16px;padding:14px 0;border-bottom:1px solid var(--line);align-items:flex-start}
.post-row:last-child{border-bottom:0}
.post-row .thumb{width:120px;flex:0 0 120px;aspect-ratio:16/10;border-radius:10px;border:1px solid var(--line)}
.post-row-body{display:flex;flex-direction:column;gap:6px;min-width:0}
.post-row-title{font-family:var(--serif);font-size:16.5px;line-height:1.5;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-row:hover .post-row-title{color:var(--ink-mid)}
.post-row time{font-size:13px;color:var(--disabled)}
.empty-state{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:12px;border:1px dashed var(--line);border-radius:var(--r-card);background:var(--surface);
  color:var(--muted);font-size:15px;text-align:center;
}
.empty-state .dot-icon{width:44px;height:44px;border-radius:50%;background:var(--mist);display:grid;place-items:center;color:var(--ink);font-family:var(--serif);font-size:18px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto}
.accordion.faq-list{border:0;border-top:1px solid var(--line);background:transparent}
.faq-list .accordion-item{border-bottom:1px solid var(--line);background:transparent}
.faq-list .accordion-title{
  display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:22px 4px;font-family:var(--serif);font-size:16.5px;font-weight:700;color:var(--ink);
  border:0;line-height:1.6;transition:color var(--ease);background:transparent;
}
.faq-list .accordion-title::before{display:none}
.faq-list .accordion-title::after{content:"+";font-family:var(--sans);font-size:22px;line-height:1;color:var(--bamboo);flex:0 0 auto;transition:transform var(--ease),color var(--ease)}
.faq-list .accordion-item.is-active .accordion-title{color:var(--ink-mid)}
.faq-list .accordion-item.is-active .accordion-title::after{content:"−";color:var(--amber);transform:rotate(180deg)}
.faq-list .accordion-content{padding:0 4px 24px;border:0;background:transparent;color:var(--muted);font-size:15.5px;line-height:1.9}
.faq-list .accordion-content p{margin:0}

/* ---------- 表单 ---------- */
.mini-form{max-width:520px;margin-top:26px}
.mini-form label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.mini-form input{
  width:100%;height:44px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:var(--surface);color:var(--text);transition:border-color var(--ease),box-shadow var(--ease);
}
.mini-form input::placeholder{color:var(--disabled)}
.mini-form input:focus{border-color:var(--ink);box-shadow:0 0 0 2px rgba(231,241,237,1);outline:none}
.mini-form .field{margin-bottom:16px}
.form-note{font-size:13px;color:var(--muted);margin-top:10px}

/* ---------- 底部 CTA ---------- */
.end-cta{position:relative;background:var(--ink);color:#fff;text-align:center;overflow:hidden}
.end-cta h2{color:#fff;margin-bottom:14px}
.end-cta p{color:rgba(237,243,240,.82);max-width:620px;margin:0 auto 32px}
.end-cta .seal{
  position:absolute;right:8%;bottom:24px;width:56px;height:56px;border-radius:8px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.22);
  display:grid;place-items:center;font-family:var(--serif);font-size:20px;color:rgba(255,255,255,.5);
}
.end-cta .actions{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;align-items:center}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark-bg);color:var(--dark-muted);padding:72px 0 32px;font-size:15px}
.footer-grid{gap:0}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:var(--bamboo);color:var(--ink-deep)}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-mark::after{border-color:rgba(9,42,38,.35)}
.site-footer .about{font-size:14.5px;line-height:1.85;color:var(--dark-muted);max-width:280px;margin:0}
.site-footer h4{font-family:var(--sans);font-size:14px;font-weight:600;color:rgba(255,255,255,.82);margin-bottom:16px;letter-spacing:.04em}
.site-footer li{margin-bottom:10px}
.site-footer li a{color:var(--dark-muted);font-size:15px;display:inline-block;transition:color var(--ease),transform var(--ease)}
.site-footer li a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;font-size:13.5px;color:rgba(169,192,185,.85);
}
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;
  background:var(--ink);color:#fff;display:grid;place-items:center;
  box-shadow:var(--sh-md);opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease),background var(--ease);z-index:70;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--ink-mid);color:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .grid-container,.container{padding-left:22px;padding-right:22px}
}
@media (max-width:1023px){
  body{font-size:16.5px}
  .section{padding:72px 0}
  .section-tight{padding:60px 0}
  .nav-chips{display:none}
  .nav-toggle{display:inline-flex}
  .mobile-nav{display:block}
  .hero{padding:60px 0 56px}
  .hero-grid{min-height:auto;gap:36px 0}
  .hero-lead{max-width:none}
  .hero-visual{margin-top:34px}
  .hero-stat{right:12px;bottom:-18px}
  .flow-steps{grid-template-columns:repeat(2,1fr);gap:32px 0}
  .flow-steps::before{display:none}
  .flow-step{padding-right:20px}
  .flow-step .dot{margin-bottom:16px;box-shadow:none}
  .trust-list{flex-wrap:wrap}
  .trust-item{flex:1 1 100%;padding:12px 0}
  .trust-item+.trust-item{border-left:0;border-top:1px solid var(--line)}
  .metric+.metric{border-left:0}
  .metrics .grid-x>.cell+.cell .metric{border-left:0}
  .section-head{margin-bottom:36px}
}
@media (max-width:639px){
  .container,.grid-container{padding-left:16px;padding-right:16px}
  .grid-x{margin-left:-8px;margin-right:-8px}
  .grid-x>.cell{padding-left:8px;padding-right:8px}
  .section{padding:56px 0}
  .section-tight{padding:48px 0}
  .brand-text em{display:none}
  .brand-text{font-size:16px}
  .nav-cta .btn{height:34px;padding:0 12px;font-size:14px}
  .hero{padding:44px 0 44px}
  .hero-lead{font-size:16px;margin-bottom:26px}
  .hero-actions .btn{width:100%}
  .hero-stat{position:static;margin-top:-26px;margin-left:16px;margin-right:16px;justify-content:space-around;gap:12px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .flow-steps{grid-template-columns:1fr;gap:0}
  .flow-step{padding:0 0 28px 22px;border-left:2px solid var(--mist)}
  .flow-step:last-child{padding-bottom:0}
  .flow-step .dot{position:absolute;left:-7px;top:4px;margin-bottom:0;box-shadow:0 0 0 5px var(--paper)}
  .pain-item{gap:16px;padding:22px 0}
  .pain-num{font-size:26px;min-width:40px}
  .post-row .thumb{width:88px;flex:0 0 88px;aspect-ratio:1/1;border-radius:8px}
  .quote-card{padding:24px 22px 22px}
  .quote-card p{font-size:15.5px}
  .end-cta .seal{display:none}
  .to-top{right:16px;bottom:16px}
  .site-footer{padding:56px 0 26px}
  .site-footer .about{max-width:none}
}
@media (min-width:1024px){
  .nav-toggle{display:none}
  .mobile-nav{display:none}
}

/* roulang page: article */
:root{
  --ink:#0F3B36;
  --ink-deep:#092A26;
  --ink-mid:#1C5A50;
  --bamboo:#6FAF9B;
  --mist:#E7F1ED;
  --amber:#D97A2B;
  --amber-hover:#BC6519;
  --dark-bg:#0B2C29;
  --dark-text:#EDF3F0;
  --dark-muted:#A9C0B9;
  --paper:#FAF8F3;
  --paper-2:#F2EFE7;
  --card:#FFFFFF;
  --line:#E3DED3;
  --text:#1E2826;
  --muted:#5C6A66;
  --disabled:#9AA5A1;
  --ok:#2E8B6B;
  --warn:#C9911F;
  --err:#C0453B;

  --r-chip:999px;
  --r-btn:10px;
  --r-tag:6px;
  --r-card:16px;
  --r-panel:20px;

  --sh-sm:0 1px 2px rgba(15,59,54,.06);
  --sh-md:0 6px 20px rgba(15,59,54,.08);
  --sh-lg:0 16px 40px rgba(15,59,54,.12);

  --ease:220ms cubic-bezier(.2,.7,.3,1);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
  --font-mono:"JetBrains Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.9;
  letter-spacing:.01em;
}
img{max-width:100%;height:auto;display:block;border-style:none}
a{color:var(--ink-mid);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--ink)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-family:var(--font-serif);font-weight:700;line-height:1.32;color:var(--ink-deep)}
p{margin:0 0 1.15em}
button{font:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px}

.grid-container{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
@media screen and (min-width:1280px){.grid-container{max-width:1280px}}
@media screen and (max-width:1023px){.grid-container{padding-left:20px;padding-right:20px}}
@media screen and (max-width:639px){.grid-container{padding-left:16px;padding-right:16px}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(250,248,243,.94);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),height var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-md);backdrop-filter:blur(6px)}
.header-inner{display:flex;align-items:center;gap:24px;height:72px}
.site-header.is-scrolled .header-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;min-height:44px}
.brand-mark{
  width:34px;height:34px;border-radius:8px;
  background:var(--ink);color:#fff;
  font-family:var(--font-serif);font-size:18px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-sm);
}
.brand-text{font-family:var(--font-serif);font-size:19px;font-weight:700;color:var(--ink-deep);letter-spacing:.02em}
.nav-chips{display:flex;align-items:center;gap:6px;flex:1 1 auto;overflow-x:auto;scrollbar-width:none}
.nav-chips::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  height:36px;padding:0 16px;border-radius:var(--r-chip);
  border:1px solid var(--line);background:transparent;
  color:var(--muted);font-size:15px;white-space:nowrap;
  transition:background var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.chip i{font-size:13px}
.chip:hover{background:var(--mist);color:var(--ink);border-color:var(--bamboo)}
.chip.is-active{background:var(--ink);color:#fff;border-color:var(--ink);box-shadow:var(--sh-sm)}
.header-cta{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:var(--card);color:var(--ink);
}
@media screen and (max-width:1023px){
  .header-inner{height:64px;gap:14px}
  .nav-chips{
    -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 16px,#000 calc(100% - 16px),transparent 100%);
    mask-image:linear-gradient(90deg,transparent 0,#000 16px,#000 calc(100% - 16px),transparent 100%);
  }
  .menu-toggle{display:inline-flex;align-items:center;justify-content:center}
}
@media screen and (max-width:639px){
  .brand-text{font-size:16px}
  .chip{height:34px;padding:0 13px;font-size:14px}
  .header-cta .btn-primary{display:none}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15.5px;font-weight:600;border:1px solid transparent;
  transition:background var(--ease),color var(--ease),transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.btn-primary{background:var(--amber);color:#fff;box-shadow:var(--sh-sm)}
.btn-primary:hover{background:var(--amber-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-primary:active{transform:translateY(0);background:var(--amber-hover)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--mist);color:var(--ink)}
.btn-sm{height:38px;padding:0 18px;font-size:14.5px}
.btn-lg{height:48px;padding:0 28px;font-size:16.5px}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--ink-mid);font-weight:600;font-size:15px;position:relative;
}
.link-arrow::after{
  content:"";position:absolute;left:0;bottom:-3px;height:1px;width:0;
  background:var(--ink-mid);transition:width var(--ease);
}
.link-arrow i{transition:transform var(--ease);font-size:12px}
.link-arrow:hover{color:var(--ink)}
.link-arrow:hover::after{width:100%}
.link-arrow:hover i{transform:translateX(3px)}

/* ---------- 面包屑 ---------- */
.crumbs{padding:24px 0 0;font-size:13.5px;color:var(--muted)}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs li{display:flex;align-items:center;gap:8px;max-width:340px}
.crumbs li+li::before{content:"/";color:var(--line)}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--ink)}
.crumbs .current{color:var(--ink);font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头部 ---------- */
.article-head{padding:18px 0 28px;border-bottom:1px solid var(--line)}
.tag{
  display:inline-flex;align-items:center;
  height:26px;padding:0 10px;border-radius:var(--r-chip);
  background:var(--mist);color:var(--ink-mid);
  font-size:13px;font-weight:600;
}
.article-head h1{
  font-size:clamp(28px,3.2vw,44px);
  margin:16px 0 18px;
  max-width:900px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  font-size:13.5px;color:var(--muted);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.share-row{display:flex;align-items:center;gap:10px;margin-top:18px}
.share-row a{
  width:32px;height:32px;border-radius:50%;
  border:1px solid var(--line);background:var(--card);color:var(--muted);
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;
  transition:all var(--ease);
}
.share-row a:hover{background:var(--ink);color:#fff;border-color:var(--ink);transform:translateY(-1px)}
.share-label{font-size:13.5px;color:var(--muted);margin-right:4px}

/* ---------- 布局 ---------- */
.layout{padding:40px 0 8px}
.main-col{padding-right:32px}
@media screen and (max-width:1023px){.main-col{padding-right:0}}

.panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-sm);
}

/* ---------- 正文排版 ---------- */
.article-body{font-size:17px;line-height:1.9;color:var(--text);max-width:760px}
.article-body p{margin:0 0 1.15em}
.article-body h2{
  font-size:clamp(22px,2.2vw,30px);
  margin:2.4em 0 .9em;padding-left:12px;border-left:3px solid var(--ink);
}
.article-body h3{font-size:20px;margin:1.8em 0 .6em}
.article-body h4{font-size:17px;margin:1.5em 0 .5em;color:var(--ink)}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:0}
.article-body ul li,.article-body ol li{position:relative;padding-left:20px;margin-bottom:8px;line-height:1.8}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:6px;height:6px;border-radius:50%;background:var(--ink-mid);
}
.article-body ol{counter-reset:li}
.article-body ol li{counter-increment:li}
.article-body ol li::before{
  content:counter(li);position:absolute;left:0;top:.15em;
  width:16px;height:16px;border-radius:50%;background:var(--mist);color:var(--ink-mid);
  font-family:var(--font-num);font-size:11px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.article-body blockquote{
  margin:1.6em 0;padding:14px 18px;border-left:3px solid var(--bamboo);
  background:var(--mist);border-radius:0 var(--r-tag) var(--r-tag) 0;
  color:var(--ink-mid);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-card);border:1px solid var(--line);margin:1.6em 0 .6em}
.article-body figure{margin:1.6em 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--muted)}
.article-body pre{
  background:var(--ink-deep);color:#DCE9E4;border-radius:var(--r-card);
  padding:18px 20px;overflow-x:auto;font-family:var(--font-mono);font-size:14px;line-height:1.7;
}
.article-body code{font-family:var(--font-mono);font-size:14px;background:var(--paper-2);padding:2px 6px;border-radius:var(--r-tag)}
.article-body pre code{background:transparent;padding:0;color:inherit}
.article-body .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-card);margin:1.6em 0}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;line-height:1.6;min-width:520px}
.article-body thead th{background:var(--mist);color:var(--ink);text-align:left;font-weight:600}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line)}
.article-body tbody tr:nth-child(even){background:var(--paper)}
.article-body strong{color:var(--ink-deep)}
.article-body a{border-bottom:1px solid var(--bamboo)}

.empty-state{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:12px;text-align:center;color:var(--muted);
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
}
.empty-state i{font-size:26px;color:var(--bamboo)}
.empty-state strong{font-family:var(--font-serif);font-size:19px;color:var(--ink)}

/* ---------- 标签与前后篇 ---------- */
.section-block{margin-top:56px;max-width:760px}
.section-title{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--line);
}
.section-title h2{font-size:22px}
.tag-list{display:flex;flex-wrap:wrap;gap:8px}
.tag-list a{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;
  border-radius:var(--r-chip);background:var(--paper-2);border:1px solid var(--line);
  color:var(--muted);font-size:13.5px;transition:all var(--ease);
}
.tag-list a:hover{background:var(--mist);color:var(--ink);border-color:var(--bamboo)}
.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.prevnext a{
  display:block;padding:18px 20px;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.prevnext a:hover{transform:translateY(-2px);box-shadow:var(--sh-lg);border-color:rgba(15,59,54,.28)}
.prevnext .dir{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:6px}
.prevnext .ttl{margin-top:8px;color:var(--ink-deep);font-weight:600;font-size:15.5px;line-height:1.6}
.prevnext .next-dir{justify-content:flex-end}
@media screen and (max-width:639px){.prevnext{grid-template-columns:1fr}}

/* ---------- 相关推荐卡片 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media screen and (max-width:1023px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media screen and (max-width:639px){.card-grid{grid-template-columns:1fr}}
.post-card{
  display:flex;flex-direction:column;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-sm);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--sh-lg);border-color:rgba(15,59,54,.28)}
.post-card .thumb{aspect-ratio:16/9;overflow:hidden;border-bottom:1px solid var(--line)}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--ease)}
.post-card:hover .thumb img{transform:scale(1.03)}
.post-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card h3{
  font-size:17px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card:hover h3{color:var(--ink-mid)}
.post-card .excerpt{
  font-size:14.5px;color:var(--muted);line-height:1.75;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card .meta{
  margin-top:auto;display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);font-family:var(--font-num);
}

/* ---------- 侧栏 ---------- */
.side-col{padding-left:8px}
@media screen and (max-width:1023px){.side-col{padding-left:0;margin-top:40px}}
.side-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-sm);
}
@media screen and (min-width:1024px){
  .side-sticky{position:sticky;top:96px}
}
.side-card h3{font-size:17px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.side-list li{padding:14px 0;border-bottom:1px dashed var(--line)}
.side-list li:last-child{border-bottom:0;padding-bottom:4px}
.side-list a{display:block;color:var(--ink-deep);font-size:15px;font-weight:600;line-height:1.6}
.side-list a:hover{color:var(--ink-mid)}
.side-list .date{display:block;margin-top:6px;font-size:12.5px;color:var(--disabled);font-family:var(--font-num)}
.side-cover{margin-top:18px;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line)}
.side-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}

/* ---------- CTA ---------- */
.cta-band{
  margin-top:72px;background:var(--dark-bg);color:var(--dark-text);
  border-radius:var(--r-panel);padding:64px 40px;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-40px;bottom:-40px;width:150px;height:150px;
  background:rgba(217,122,43,.16);border-radius:24px;transform:rotate(12deg);
}
.cta-band .inner{position:relative;z-index:2;max-width:680px;margin:0 auto;text-align:center}
.cta-band h2{color:#fff;font-size:clamp(22px,2.4vw,30px);margin-bottom:14px}
.cta-band p{color:var(--dark-muted);font-size:16px;margin-bottom:26px}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;align-items:center}
.cta-band .link-arrow{color:var(--bamboo)}
.cta-band .link-arrow::after{background:var(--bamboo)}
.cta-band .link-arrow:hover{color:#fff}
@media screen and (max-width:639px){.cta-band{padding:44px 22px;margin-top:56px;border-radius:var(--r-card)}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark-bg);color:var(--dark-muted);margin-top:96px;padding:72px 0 32px;position:relative}
.site-footer h4{color:rgba(255,255,255,.82);font-size:14px;font-family:var(--font-sans);letter-spacing:.06em;margin-bottom:18px}
.site-footer ul li{margin-bottom:12px}
.site-footer a{color:var(--dark-muted);font-size:15px;display:inline-block;transition:color var(--ease),transform var(--ease)}
.site-footer a:hover{color:#fff;transform:translateX(2px)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.12);color:#fff}
.footer-brand .brand-text{color:#fff}
.site-footer .about{color:var(--dark-muted);font-size:14.5px;line-height:1.85;margin:0;max-width:340px}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13.5px;color:var(--dark-muted);
}
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;
  background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-md);opacity:0;visibility:hidden;transform:translateY(8px);
  transition:all var(--ease);z-index:80;
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--ink-mid);color:#fff}
@media screen and (max-width:1023px){
  .site-footer{padding:56px 0 28px;margin-top:72px}
  .site-footer .cell{margin-bottom:32px}
}
@media screen and (max-width:639px){
  .site-footer{padding:44px 0 24px}
  .footer-bottom{flex-direction:column}
  .to-top{right:14px;bottom:14px;width:44px;height:44px}
}

/* roulang page: category1 */
:root{
  --ink:#0F3B36;
  --ink-deep:#092A26;
  --ink-mid:#1C5A50;
  --bamboo:#6FAF9B;
  --mist:#E7F1ED;
  --amber:#D97A2B;
  --amber-hover:#BC6519;
  --dark:#0B2C29;
  --dark-text:#EDF3F0;
  --dark-muted:#A9C0B9;
  --paper:#FAF8F3;
  --paper-2:#F2EFE7;
  --surface:#FFFFFF;
  --line:#E3DED3;
  --text:#1E2826;
  --muted:#5C6A66;
  --disabled:#9AA5A1;
  --success:#2E8B6B;
  --warn:#C9911F;
  --error:#C0453B;
  --r-chip:999px;
  --r-btn:10px;
  --r-tag:6px;
  --r-card:16px;
  --r-panel:20px;
  --sh-sm:0 1px 2px rgba(15,59,54,.06);
  --sh-md:0 6px 20px rgba(15,59,54,.08);
  --sh-lg:0 16px 40px rgba(15,59,54,.12);
  --ease:220ms cubic-bezier(.2,.7,.3,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.9;
  letter-spacing:.01em;
}
img{max-width:100%;display:block}
a{color:var(--ink);text-decoration:none;transition:color var(--ease),background var(--ease),border-color var(--ease),transform var(--ease)}
a:hover{color:var(--ink-mid)}
h1,h2,h3,h4{font-family:var(--serif);color:var(--ink);letter-spacing:.01em;margin:0}
h1{font-size:clamp(30px,3.4vw,46px);line-height:1.3;font-weight:700}
h2{font-size:clamp(24px,2.4vw,32px);line-height:1.32;font-weight:700;margin:2.4em 0 .9em}
h3{font-size:20px;line-height:1.4;font-weight:700;margin:1.8em 0 .6em}
h4{font-size:17px;line-height:1.45;font-weight:700;margin:0 0 .5em}
p{margin:0 0 1.15em}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
.grid-container{max-width:1200px;padding-left:24px;padding-right:24px}
@media screen and (min-width:1400px){.grid-container{max-width:1280px}}
@media screen and (max-width:1023px){.grid-container{padding-left:20px;padding-right:20px}}
@media screen and (max-width:639px){.grid-container{padding-left:16px;padding-right:16px}}

/* ---------- 按钮 ---------- */
.button,.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-family:var(--sans);font-size:15.5px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;text-decoration:none;
  transition:background var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.btn-primary{background:var(--amber);color:#fff;box-shadow:var(--sh-sm)}
.btn-primary:hover,.btn-primary:focus{background:var(--amber-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-primary:active{transform:translateY(0);background:#A9550F}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover,.btn-ghost:focus{background:var(--mist);color:var(--ink);border-color:var(--ink-mid)}
.btn-ghost:active{background:#D7E7E1}
.btn-sm{height:38px;padding:0 18px;font-size:14.5px}
.btn-lg{height:48px;padding:0 28px;font-size:16px}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--ink);position:relative}
.link-arrow::after{content:"→";transition:transform var(--ease)}
.link-arrow:hover::after{transform:translateX(3px)}
.link-arrow::before{content:"";position:absolute;left:0;bottom:-3px;height:1px;width:0;background:var(--ink);transition:width var(--ease)}
.link-arrow:hover::before{width:calc(100% - 22px)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(250,248,243,.94);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-md)}
.header-inner{display:flex;align-items:center;gap:24px;height:72px;transition:height var(--ease)}
.site-header.is-scrolled .header-inner{height:60px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:8px;background:var(--ink);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--serif);font-size:18px;font-weight:700;line-height:1;
}
.brand-text{font-family:var(--serif);font-size:18px;font-weight:700;color:var(--ink);white-space:nowrap}
.nav-chips{display:flex;align-items:center;gap:6px;margin:0 auto;flex-wrap:nowrap}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  height:36px;padding:0 16px;border-radius:var(--r-chip);
  border:1px solid var(--line);background:transparent;color:var(--muted);
  font-size:14.5px;font-weight:600;white-space:nowrap;
  transition:background var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.chip:hover{background:var(--mist);color:var(--ink);border-color:#CFDFD8}
.chip.is-active{background:var(--ink);border-color:var(--ink);color:#fff;box-shadow:var(--sh-sm)}
.chip.is-active:hover{background:var(--ink-deep);color:#fff}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:auto}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:transparent;color:var(--ink);font-size:18px;line-height:1;cursor:pointer;
}
.nav-drawer{display:none}

/* ---------- 面包屑 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);padding:22px 0 0}
.breadcrumb a{color:var(--ink);font-weight:600}
.breadcrumb span.sep{color:var(--disabled)}
.breadcrumb .current{color:var(--muted)}

/* ---------- 分类页 Hero ---------- */
.page-hero{background:var(--paper-2);border-bottom:1px solid var(--line);padding-bottom:44px}
.page-hero .grid-x{align-items:center}
.hero-copy{padding:26px 0 4px}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:700;color:var(--ink-mid);
  letter-spacing:.06em;margin-bottom:14px;
}
.hero-eyebrow::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--amber)}
.page-hero h1{margin-bottom:14px}
.hero-lead{font-size:17px;line-height:1.85;color:var(--muted);max-width:560px;margin-bottom:22px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.hero-media{border-radius:var(--r-panel);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-md);margin-top:14px}
.hero-media img{width:100%;height:280px;object-fit:cover}
.hero-facts{display:flex;gap:24px;margin-top:18px;flex-wrap:wrap}
.hero-facts div{font-size:13.5px;color:var(--muted)}
.hero-facts strong{display:block;font-family:var(--serif);font-size:26px;color:var(--ink);font-variant-numeric:tabular-nums}

/* ---------- 板块通用 ---------- */
.section{padding:96px 0}
.section.tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{margin-top:0}
.section-head p{color:var(--muted);margin-bottom:0}
.section-kicker{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--ink-mid);
  background:var(--mist);border-radius:var(--r-chip);padding:5px 14px;margin-bottom:16px;
}
@media screen and (max-width:1023px){.section{padding:72px 0}.section.tight{padding:56px 0}}
@media screen and (max-width:639px){.section{padding:56px 0}.section.tight{padding:48px 0}}

/* ---------- 交错图文 ---------- */
.zigzag-item{padding:48px 0;border-top:1px solid var(--line)}
.zigzag-item:first-of-type{border-top:0;padding-top:0}
.zigzag-item .grid-x{align-items:center}
.media-frame{border-radius:var(--r-panel);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-md);background:var(--surface)}
.media-frame img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform var(--ease)}
.media-frame:hover img{transform:scale(1.03)}
.zigzag-copy h2{margin-top:0;margin-bottom:16px}
.zigzag-copy p{color:var(--text);font-size:16.5px}
.zigzag-copy p.muted{color:var(--muted)}
.bullet-list{margin-top:20px}
.bullet-list li{position:relative;padding-left:20px;margin-bottom:10px;font-size:16px;line-height:1.8;color:var(--text)}
.bullet-list li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--bamboo)}
.zigzag-index{
  font-family:var(--serif);font-size:14px;font-weight:700;color:var(--bamboo);
  letter-spacing:.14em;display:block;margin-bottom:10px;
}

/* ---------- 关键要点 ---------- */
.points-strip{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.points-grid{padding-top:8px}
.point-row{
  display:flex;align-items:flex-start;gap:12px;
  padding:16px 0;border-top:1px solid var(--line);font-size:16px;line-height:1.75;
}
.point-row::before{content:"";flex:0 0 auto;width:7px;height:7px;border-radius:50%;background:var(--ink);margin-top:.75em}
.point-row strong{font-family:var(--serif);color:var(--ink);font-weight:700;margin-right:6px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-accordion,.faq-accordion .accordion-item{background:transparent;border:0;margin:0}
.faq-accordion .accordion-item{border-bottom:1px solid var(--line)}
.faq-accordion .accordion-title{
  display:flex;align-items:flex-start;gap:12px;
  padding:20px 46px 20px 0;border:0;background:transparent;
  font-family:var(--sans);font-size:16.5px;font-weight:600;color:var(--text);line-height:1.65;
  position:relative;transition:color var(--ease);
}
.faq-accordion .accordion-title:hover{color:var(--ink)}
.faq-accordion .accordion-title::before{
  content:"+";position:absolute;right:8px;top:19px;
  font-family:var(--sans);font-size:20px;font-weight:400;color:var(--ink-mid);
  transition:transform var(--ease),color var(--ease);
}
.faq-accordion .accordion-item.is-active .accordion-title{color:var(--ink)}
.faq-accordion .accordion-item.is-active .accordion-title::before{content:"−";color:var(--amber);transform:rotate(180deg)}
.faq-no{
  flex:0 0 auto;width:26px;height:26px;border-radius:6px;background:var(--mist);color:var(--ink-mid);
  font-size:12.5px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;margin-top:2px;
}
.faq-accordion .accordion-content{padding:0 46px 22px 38px;border:0;background:transparent;color:var(--muted);font-size:15.5px;line-height:1.9}
.faq-accordion .accordion-content p{margin-bottom:.8em}
.faq-accordion .accordion-content p:last-child{margin-bottom:0}
.faq-foot{margin-top:28px;text-align:center}

/* ---------- CTA ---------- */
.cta-band{background:var(--dark);color:var(--dark-text);position:relative;overflow:hidden}
.cta-inner{padding:80px 0;text-align:center;position:relative;z-index:2}
.cta-inner h2{color:#fff;margin:0 0 14px}
.cta-inner p{color:var(--dark-muted);max-width:640px;margin:0 auto 28px;font-size:16.5px}
.cta-actions{display:flex;justify-content:center;align-items:center;gap:22px;flex-wrap:wrap}
.cta-actions .link-arrow{color:#fff}
.cta-actions .link-arrow::before{background:#fff}
.cta-seal{
  position:absolute;right:48px;bottom:44px;width:64px;height:64px;border-radius:12px;
  background:rgba(111,175,155,.16);border:1px solid rgba(255,255,255,.16);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--serif);font-size:22px;color:rgba(255,255,255,.55);
}
@media screen and (max-width:639px){.cta-inner{padding:56px 0}.cta-seal{display:none}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--dark-muted);padding:72px 0 32px;position:relative}
.site-footer h4{color:rgba(255,255,255,.82);font-family:var(--sans);font-size:14px;font-weight:700;letter-spacing:.04em;margin-bottom:16px}
.site-footer ul li{margin-bottom:10px}
.site-footer a{color:var(--dark-muted);font-size:15px;display:inline-block;transition:color var(--ease),transform var(--ease)}
.site-footer a:hover{color:#fff;transform:translateX(2px)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:#fff;color:var(--ink)}
.footer-brand .brand-text{color:#fff;font-family:var(--serif);font-size:17px}
.site-footer .about{font-size:14.5px;line-height:1.85;color:#96B0A8;margin:0;max-width:320px}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:#8CA69E;
}
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;
  background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:18px;box-shadow:var(--sh-lg);opacity:0;visibility:hidden;
  transition:opacity var(--ease),visibility var(--ease),background var(--ease),transform var(--ease);
  z-index:90;
}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{background:var(--ink-mid);color:#fff;transform:translateY(-2px)}

/* ---------- 移动端 ---------- */
@media screen and (max-width:1023px){
  .hero-media img{height:240px}
  .page-hero{padding-bottom:36px}
  .zigzag-item{padding:36px 0}
  .zigzag-item .media-frame{margin-bottom:24px}
}
@media screen and (max-width:639px){
  body{font-size:16px}
  .header-inner{height:auto;flex-wrap:wrap;padding:12px 0 0;gap:10px 12px}
  .site-header.is-scrolled .header-inner{height:auto}
  .brand-text{font-size:16.5px}
  .header-actions{margin-left:auto}
  .menu-toggle{display:inline-flex;align-items:center;justify-content:center}
  .nav-chips{
    order:3;flex:0 0 100%;width:100%;margin:0 -16px;padding:2px 16px 12px;
    overflow-x:auto;flex-wrap:nowrap;-webkit-overflow-scrolling:touch;
    -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 18px,#000 calc(100% - 18px),transparent 100%);
    mask-image:linear-gradient(90deg,transparent 0,#000 18px,#000 calc(100% - 18px),transparent 100%);
    scrollbar-width:none;
  }
  .nav-chips::-webkit-scrollbar{display:none}
  .chip{flex:0 0 auto}
  .nav-drawer{
    order:4;flex:0 0 100%;width:100%;margin:0 -16px;padding:8px 16px 16px;
    border-top:1px solid var(--line);
  }
  .nav-drawer.is-open{display:block}
  .nav-drawer a{display:block;padding:12px 4px;font-size:16px;font-weight:600;border-bottom:1px solid var(--line)}
  .nav-drawer a:last-child{border-bottom:0}
  .breadcrumb{padding-top:16px}
  .hero-copy{padding-top:18px}
  .hero-lead{font-size:16px}
  .hero-media img{height:200px}
  .faq-accordion .accordion-title{font-size:16px;padding-right:38px}
  .faq-accordion .accordion-content{padding:0 8px 20px 38px}
  .footer-bottom{flex-direction:column;gap:8px}
  .to-top{right:16px;bottom:16px}
}

/* roulang page: category2 */
:root{
  --ink:#0F3B36;
  --ink-deep:#092A26;
  --ink-mid:#1C5A50;
  --bamboo:#6FAF9B;
  --mist:#E7F1ED;
  --amber:#D97A2B;
  --amber-hover:#BC6519;
  --dark:#0B2C29;
  --dark-text:#EDF3F0;
  --dark-sub:#A9C0B9;
  --bg:#FAF8F3;
  --bg-2:#F2EFE7;
  --card:#FFFFFF;
  --line:#E3DED3;
  --text:#1E2826;
  --text-2:#5C6A66;
  --muted:#9AA5A1;
  --ok:#2E8B6B;
  --warn:#C9911F;
  --err:#C0453B;
  --r-chip:999px;
  --r-btn:10px;
  --r-tag:6px;
  --r-card:16px;
  --r-panel:20px;
  --sh-sm:0 1px 2px rgba(15,59,54,.06);
  --sh-md:0 6px 20px rgba(15,59,54,.08);
  --sh-lg:0 16px 40px rgba(15,59,54,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Menlo",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--ink-mid);text-decoration:none;transition:color 220ms var(--ease),border-color 220ms var(--ease),background-color 220ms var(--ease)}
a:hover{color:var(--ink)}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px;border-radius:6px}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--ink-deep);line-height:1.32;margin:0;font-weight:700}
h1{font-size:clamp(30px,3.4vw,46px);letter-spacing:.01em}
h2{font-size:clamp(24px,2.4vw,32px);margin:0 0 .9em}
h3{font-size:20px}
h4{font-size:17px}
p{margin:0 0 1.15em}
p:last-child{margin-bottom:0}

.grid-container{max-width:1200px;padding-left:24px;padding-right:24px;margin-left:auto;margin-right:auto}
@media screen and (min-width:1400px){.grid-container{max-width:1280px}}
@media screen and (max-width:1023px){.grid-container{padding-left:20px;padding-right:20px}}
@media screen and (max-width:639px){.grid-container{padding-left:16px;padding-right:16px}}

.section{padding:96px 0}
@media screen and (max-width:1023px){.section{padding:72px 0}}
@media screen and (max-width:639px){.section{padding:56px 0}}
.section--tight{padding-top:64px}
.section--mist{background:var(--mist)}
.section--paper{background:var(--bg-2)}

/* ---------- 按钮体系 ---------- */
.button,.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-family:var(--font-sans);font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;background:transparent;color:var(--ink);
  cursor:pointer;transition:all 220ms var(--ease);margin:0;
}
.button:focus,.btn:focus{outline:none}
.btn-primary,.button.btn-primary{background:var(--amber);color:#fff;border-color:var(--amber)}
.btn-primary:hover,.btn-primary:focus-visible,.button.btn-primary:hover{background:var(--amber-hover);border-color:var(--amber-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-primary:active{transform:translateY(0);background:var(--amber-hover)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover,.btn-ghost:focus-visible{background:var(--mist);color:var(--ink);border-color:var(--ink)}
.btn-lg{height:48px;padding:0 28px;font-size:16px}
.btn-sm{height:36px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}
.arrow-link{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--ink-mid);
  padding-bottom:2px;position:relative;min-height:44px;
}
.arrow-link::after{content:"";position:absolute;left:0;bottom:8px;width:0;height:1px;background:currentColor;transition:width 220ms var(--ease)}
.arrow-link:hover::after,.arrow-link:focus-visible::after{width:100%}
.arrow-link i{font-size:12px;transition:transform 220ms var(--ease)}
.arrow-link:hover i{transform:translateX(3px)}
.arrow-link--light{color:var(--bamboo)}
.arrow-link--light:hover{color:#fff}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(250,248,243,.92);
  border-bottom:1px solid var(--line);backdrop-filter:blur(8px);
  transition:box-shadow 220ms var(--ease),background-color 220ms var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-md);background:rgba(250,248,243,.97)}
.header-inner{
  display:flex;align-items:center;gap:24px;min-height:72px;flex-wrap:wrap;
  transition:min-height 220ms var(--ease);
}
.site-header.is-scrolled .header-inner{min-height:60px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:8px;background:var(--ink);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-serif);font-size:18px;font-weight:700;letter-spacing:1px;
}
.brand-text{font-family:var(--font-serif);font-size:19px;font-weight:700;color:var(--ink-deep);letter-spacing:.02em}
/* 深底版本 Logo */
.brand--dark .brand-mark{background:#fff;color:var(--ink-deep)}
.brand--dark .brand-text{color:#fff}
.nav-chips{display:flex;align-items:center;gap:6px;flex:1 1 auto;flex-wrap:wrap}
.chip{
  display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 16px;border-radius:var(--r-chip);
  border:1px solid var(--line);background:transparent;color:var(--text-2);
  font-size:15px;font-weight:500;white-space:nowrap;transition:all 220ms var(--ease);
}
.chip i{font-size:13px}
.chip:hover{background:var(--mist);color:var(--ink);border-color:var(--bamboo)}
.chip.is-active,.chip[aria-current="page"]{background:var(--ink);border-color:var(--ink);color:#fff;box-shadow:var(--sh-sm)}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:auto}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);
  background:transparent;cursor:pointer;padding:0;place-items:center;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);margin:3px auto;border-radius:2px;transition:transform 220ms var(--ease),opacity 220ms var(--ease)}
.menu-toggle.is-open span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.menu-toggle.is-open span:nth-child(2){opacity:0}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.mobile-nav{display:none;border-top:1px solid var(--line);padding:12px 0 18px;width:100%}
.mobile-nav .m-link{display:block;padding:12px 0;font-size:16px;color:var(--text);border-bottom:1px solid var(--line)}
.mobile-nav .m-link.is-active{color:var(--ink);font-weight:700}
.mobile-nav .btn{margin-top:16px}
@media screen and (max-width:1023px){
  .nav-chips{
    order:3;width:100%;flex-wrap:nowrap;overflow-x:auto;gap:6px;
    padding:4px 0 12px;margin:0;-webkit-overflow-scrolling:touch;
    mask-image:linear-gradient(to right,transparent,#000 14px,#000 calc(100% - 14px),transparent);
    -webkit-mask-image:linear-gradient(to right,transparent,#000 14px,#000 calc(100% - 14px),transparent);
  }
  .nav-chips::-webkit-scrollbar{display:none}
  .nav-chips .chip{flex:0 0 auto}
  .menu-toggle{display:grid}
  .header-inner{gap:12px}
}
@media screen and (max-width:639px){
  .brand-text{font-size:17px}
  .header-actions .desktop-cta{display:none}
  .mobile-nav{display:block}
  .mobile-nav[hidden]{display:none}
}

/* ---------- 面包屑 ---------- */
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);margin-bottom:18px;flex-wrap:wrap}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb .sep{color:var(--muted)}
.breadcrumb .current{color:var(--ink);font-weight:600}

/* ---------- 分类页 Hero ---------- */
.cat-hero{
  background:var(--mist);border-bottom:1px solid var(--line);
  padding:48px 0;min-height:280px;display:flex;align-items:center;
  position:relative;overflow:hidden;
}
.cat-hero::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;
  border:1px solid rgba(15,59,54,.12);border-radius:28px;transform:rotate(12deg);
}
.cat-hero .eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;border-radius:var(--r-chip);
  background:rgba(15,59,54,.08);color:var(--ink);font-size:13px;font-weight:600;margin-bottom:16px;
}
.cat-hero h1{margin-bottom:14px}
.cat-hero .lede{font-size:17px;color:var(--text-2);max-width:560px;margin-bottom:0}
.stat-board{
  display:flex;gap:0;background:var(--card);border:1px solid var(--line);border-radius:var(--r-panel);
  box-shadow:var(--sh-sm);padding:24px 8px;margin-top:24px;
}
.stat{flex:1 1 0;text-align:center;padding:0 12px;position:relative}
.stat+.stat::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:1px;background:var(--line)}
.stat-num{display:block;font-family:var(--font-serif);font-size:40px;line-height:1.1;color:var(--ink);font-variant-numeric:tabular-nums}
.stat-lbl{display:block;font-size:13px;color:var(--text-2);margin-top:6px}
@media screen and (max-width:1023px){
  .cat-hero{padding:40px 0;min-height:auto}
  .stat-board{margin-top:28px}
}
@media screen and (max-width:639px){
  .cat-hero{padding:32px 0}
  .stat-board{flex-direction:column;gap:18px;padding:20px}
  .stat+.stat::before{left:16px;right:16px;top:-9px;bottom:auto;width:auto;height:1px}
}

/* ---------- 区块标题 ---------- */
.section-head{margin-bottom:40px;max-width:760px}
.section-head .kicker{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--bamboo);
  text-transform:uppercase;margin-bottom:10px;font-family:var(--font-mono);
}
.section-head h2{margin-bottom:12px}
.section-head p{color:var(--text-2);font-size:16.5px;margin-bottom:0}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.section--mist .section-head .kicker,.section--paper .section-head .kicker{color:var(--ink-mid)}

/* ---------- 步骤条 ---------- */
.stepline{position:relative;max-width:880px;margin:0 auto;padding-top:8px}
.stepline::before{content:"";position:absolute;left:15px;top:16px;bottom:24px;width:2px;background:var(--ink-mid);opacity:.3}
.step{position:relative;padding:0 0 36px 68px}
.step:last-child{padding-bottom:0}
.step-num{
  position:absolute;left:0;top:0;width:32px;height:32px;border-radius:50%;
  background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:13px;font-weight:700;
}
.step h3{margin:0 0 10px;font-size:19px}
.step .step-lines p{color:var(--text-2);font-size:15.5px;line-height:1.85;margin-bottom:6px}
.step .step-lines p:last-child{margin-bottom:0}
@media screen and (max-width:639px){
  .step{padding-left:52px;padding-bottom:30px}
  .stepline::before{left:13px}
  .step-num{width:28px;height:28px;font-size:12px}
  .stepline::before{left:13px}
}

/* ---------- 双列说明卡片 ---------- */
.info-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:32px;box-shadow:var(--sh-sm);height:100%;
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.info-card:hover{transform:translateY(-2px);box-shadow:var(--sh-lg);border-color:rgba(15,59,54,.28)}
.info-icon{
  width:44px;height:44px;border-radius:12px;background:var(--mist);color:var(--ink);
  display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:18px;
}
.info-card h3{margin-bottom:12px;font-size:19px}
.info-card p{color:var(--text-2);font-size:15.5px;line-height:1.85;margin-bottom:8px}
.info-card .mini-list{margin-top:14px;border-top:1px solid var(--line);padding-top:14px}
.info-card .mini-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--text-2);line-height:1.8;padding:5px 0}
.info-card .mini-list li::before{content:"";flex:0 0 auto;width:6px;height:6px;border-radius:50%;background:var(--ink-mid);margin-top:10px}
.align-start > .cell{align-self:flex-start}

/* ---------- 深色自检带 ---------- */
.check-band{
  background:var(--dark);border-radius:var(--r-panel);padding:48px;color:var(--dark-text);
  position:relative;overflow:hidden;
}
.check-band::before{
  content:"";position:absolute;left:-40px;bottom:-40px;width:160px;height:160px;
  border:1px solid rgba(255,255,255,.1);border-radius:24px;transform:rotate(18deg);
}
.check-band h2,.check-band h3{color:#fff}
.check-band .lede{color:var(--dark-sub);font-size:15.5px}
.check-list{margin-top:24px}
.check-list li{display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.12);font-size:15.5px;color:var(--dark-text)}
.check-list li:last-child{border-bottom:none}
.check-list li i{color:var(--bamboo);font-size:15px;margin-top:7px}
.band-figure{border-radius:var(--r-card);overflow:hidden;border:1px solid rgba(255,255,255,.14)}
.band-figure img{width:100%;height:100%;min-height:260px;object-fit:cover}
@media screen and (max-width:1023px){
  .check-band{padding:36px}
  .band-figure{margin-top:28px}
  .band-figure img{min-height:220px}
}
@media screen and (max-width:639px){
  .check-band{padding:26px 20px;border-radius:var(--r-card)}
}

/* ---------- 注意事项清单 ---------- */
.notice-card{
  background:var(--card);border:1px solid var(--line);border-left:4px solid var(--amber);
  border-radius:var(--r-card);padding:32px 32px 28px;box-shadow:var(--sh-sm);
}
.notice-list li{
  display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-bottom:1px solid var(--line);
}
.notice-list li:last-child{border-bottom:none;padding-bottom:0}
.notice-list .idx{
  flex:0 0 auto;font-family:var(--font-mono);font-size:13px;color:var(--amber);
  width:32px;height:26px;border-radius:var(--r-tag);background:rgba(217,122,43,.1);
  display:flex;align-items:center;justify-content:center;font-weight:700;margin-top:5px;
}
.notice-list .txt{font-size:15.5px;color:var(--text-2);line-height:1.85}
.notice-list .txt strong{color:var(--ink-deep);font-weight:700;display:block;font-size:16px;margin-bottom:2px}
@media screen and (max-width:639px){.notice-card{padding:24px 20px 18px}}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto}
.accordion{border:none;background:transparent;margin:0}
.accordion .accordion-item{border:none;border-bottom:1px solid var(--line);background:transparent}
.accordion .accordion-title{
  display:flex;align-items:center;gap:14px;padding:22px 40px 22px 0;position:relative;
  font-family:var(--font-sans);font-size:16.5px;font-weight:600;color:var(--ink-deep);
  border:none;background:transparent;line-height:1.6;transition:color 220ms var(--ease);min-height:44px;
}
.accordion .accordion-title:hover{color:var(--ink-mid)}
.accordion .accordion-title::before{
  content:"";width:8px;height:8px;border-radius:2px;background:var(--ink-mid);flex:0 0 auto;
}
.accordion .accordion-title::after{
  content:"+";position:absolute;right:8px;top:50%;transform:translateY(-50%);
  font-family:var(--font-mono);font-size:20px;color:var(--ink-mid);transition:transform 180ms var(--ease);
}
.accordion .accordion-item.is-active .accordion-title{color:var(--ink)}
.accordion .accordion-item.is-active .accordion-title::after{content:"−";transform:translateY(-50%) rotate(180deg)}
.accordion .accordion-content{
  padding:0 40px 24px 22px;border:none;background:transparent;
  font-size:15.5px;color:var(--text-2);line-height:1.9;
}
.accordion .accordion-content p{margin-bottom:0}
.accordion .accordion-item:first-child .accordion-title{padding-top:6px}
.faq-foot{text-align:center;margin-top:32px}

/* ---------- CTA ---------- */
.cta-band{background:var(--ink-deep);color:#fff;padding:80px 0;position:relative;overflow:hidden}
.cta-band::after{
  content:"";position:absolute;right:48px;bottom:36px;width:52px;height:52px;border-radius:10px;
  background:rgba(217,122,43,.22);border:1px solid rgba(217,122,43,.5);
}
.cta-band h2{color:#fff;margin-bottom:14px}
.cta-band p{color:var(--dark-sub);max-width:600px;margin:0 auto 32px}
.cta-actions{display:flex;align-items:center;justify-content:center;gap:20px;flex-wrap:wrap}
@media screen and (max-width:639px){
  .cta-band{padding:56px 0}
  .cta-band::after{display:none}
  .cta-actions .btn{width:100%}
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:var(--dark-text);padding:72px 0 32px;margin-top:0}
.site-footer h4{color:rgba(255,255,255,.8);font-size:14px;letter-spacing:.06em;margin-bottom:18px;font-family:var(--font-sans);font-weight:700}
.site-footer ul li{margin-bottom:10px}
.site-footer ul li a{color:var(--dark-sub);font-size:15px;display:inline-block;transition:color 220ms var(--ease),transform 220ms var(--ease)}
.site-footer ul li a:hover{color:#fff;transform:translateX(2px)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.12);color:#fff}
.footer-brand .brand-text{color:#fff;font-family:var(--font-serif);font-size:18px;font-weight:700}
.site-footer .about{color:var(--dark-sub);font-size:15px;line-height:1.85;max-width:300px}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:var(--dark-sub);
}
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;
  background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:18px;box-shadow:var(--sh-lg);opacity:0;visibility:hidden;
  transition:opacity 220ms var(--ease),visibility 220ms var(--ease),background-color 220ms var(--ease);
  z-index:70;
}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{background:var(--ink-mid);color:#fff}
@media screen and (max-width:1023px){
  .site-footer{padding:56px 0 28px}
  .site-footer .about{max-width:none}
  .site-footer .cell{margin-bottom:32px}
}
@media screen and (max-width:639px){
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .to-top{right:16px;bottom:16px;width:44px;height:44px}
}

/* 工具类 */
.mb-0{margin-bottom:0}
.mt-32{margin-top:32px}
.mt-48{margin-top:48px}
.text-center{text-align:center}