/* roulang page: index */
:root{
  --ink:#0C3A3A;
  --ink-2:#14524F;
  --ink-3:#2C6B65;
  --accent:#E0703C;
  --accent-soft:#F6E3D8;
  --bg:#F7F6F3;
  --surface:#FFFFFF;
  --line:#E4E1DA;
  --text:#15191A;
  --text-2:#5A625F;
  --text-invert:#F2F5F4;
  --error:#A63D2F;
  --r-sm:6px;
  --r-md:10px;
  --r-lg:16px;
  --shadow:0 1px 2px rgba(12,58,58,.06);
  --shadow-hover:0 10px 28px rgba(12,58,58,.10);
  --sidebar-w:260px;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
svg{display:block}
button{font-family:inherit}
input,textarea{font-family:inherit}
a{text-decoration:none}
h1,h2,h3,h4{margin:0;font-family:var(--serif);font-weight:600;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}

/* ---------- App shell ---------- */
.sidebar{
  position:fixed;left:0;top:0;bottom:0;width:var(--sidebar-w);
  background:var(--ink);display:flex;flex-direction:column;
  z-index:80;transition:width .28s ease;
}
.sidebar-top{
  height:88px;display:flex;align-items:center;gap:12px;
  padding:0 20px;border-bottom:1px solid rgba(255,255,255,.10);flex:0 0 auto;
}
.brand{display:flex;align-items:center;gap:12px;color:var(--text-invert);min-width:0}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);
  display:flex;align-items:center;justify-content:center;color:var(--accent);
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-name{font-family:var(--serif);font-size:16px;font-weight:600;color:var(--text-invert);white-space:nowrap}
.brand-sub{font-size:11px;letter-spacing:.16em;color:rgba(242,245,244,.55);text-transform:uppercase}
.side-nav{padding:16px 12px;display:flex;flex-direction:column;gap:4px;flex:1 1 auto;overflow:auto}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;
  min-height:44px;padding:0 16px;border-radius:var(--r-sm);
  color:rgba(242,245,244,.72);font-size:15px;
  transition:background .22s ease,color .22s ease;
}
.nav-item:hover{background:rgba(255,255,255,.06);color:var(--text-invert)}
.nav-item.is-active{color:var(--text-invert);font-weight:600;background:rgba(255,255,255,.05)}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;
  border-radius:2px;background:var(--accent);
}
.nav-item:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.nav-icon{width:20px;height:20px;flex:0 0 20px;stroke-width:1.5}
.nav-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sidebar-foot{
  flex:0 0 auto;padding:18px 20px 22px;border-top:1px solid rgba(255,255,255,.10);
  font-size:12.5px;line-height:1.7;color:rgba(242,245,244,.62);
}
.sidebar-foot strong{display:block;color:var(--text-invert);font-weight:600;font-size:13px;margin-bottom:4px}
.sidebar-foot a{color:rgba(242,245,244,.75);border-bottom:1px solid rgba(242,245,244,.25)}
.sidebar-foot a:hover{color:#fff;border-color:var(--accent)}

.main{margin-left:var(--sidebar-w);min-height:100vh;transition:margin-left .28s ease}

/* ---------- Mobile topbar & drawer ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:90;
  align-items:center;justify-content:space-between;padding:0 16px;
  background:rgba(12,58,58,.92);backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(255,255,255,.10);
}
.topbar.is-solid{background:var(--ink)}
.menu-btn{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  background:transparent;border:1px solid rgba(255,255,255,.18);border-radius:var(--r-sm);
  color:var(--text-invert);cursor:pointer;
}
.menu-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.mask{
  display:none;position:fixed;inset:0;background:rgba(12,58,58,.45);z-index:95;
  opacity:0;transition:opacity .24s ease;
}
.mask.is-open{opacity:1}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:86vw;max-width:340px;z-index:100;
  background:var(--ink);transform:translateX(102%);transition:transform .24s ease;
  display:flex;flex-direction:column;overflow:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:0 16px;height:60px;border-bottom:1px solid rgba(255,255,255,.10);flex:0 0 auto;
}
.drawer-close{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  background:transparent;border:1px solid rgba(255,255,255,.18);border-radius:var(--r-sm);
  color:var(--text-invert);cursor:pointer;
}
.drawer .side-nav{padding:12px}
.drawer .sidebar-foot{font-size:13px}
body.no-scroll{overflow:hidden}

/* ---------- Container & sections ---------- */
.container{max-width:1180px;margin:0 auto;padding:0 48px;width:100%}
.section{padding:96px 0}
.section-tight{padding:64px 0}
.section-dark{background:var(--ink);color:var(--text-invert)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--accent);font-family:var(--sans);font-weight:600;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent)}
.sec-title{font-size:clamp(1.7rem,2.6vw,2.35rem);line-height:1.28;color:var(--ink);margin-bottom:14px}
.section-dark .sec-title{color:var(--text-invert)}
.sec-desc{font-size:16px;line-height:1.85;color:var(--text-2);max-width:640px}
.section-dark .sec-desc{color:rgba(242,245,244,.78)}
.sec-head{margin-bottom:48px;display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-md);border:1px solid transparent;
  font-size:15px;font-weight:500;cursor:pointer;
  transition:background .24s ease,color .24s ease,border-color .24s ease,transform .16s ease;
}
.btn svg{width:16px;height:16px;transition:transform .24s ease}
.btn-primary{background:var(--ink);color:var(--text-invert)}
.btn-primary:hover{background:var(--ink-2)}
.btn-primary:hover svg{transform:translateX(4px)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-outline:hover{background:var(--ink);color:var(--text-invert)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--accent-soft)}
.btn-lg{height:52px;padding:0 28px}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;color:var(--accent);
  font-size:15px;font-weight:500;position:relative;padding-bottom:2px;
}
.link-arrow::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .26s ease;
}
.link-arrow:hover::after{transform:scaleX(1)}
.link-arrow svg{width:14px;height:14px}
.link-arrow:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}

/* ---------- Hero ---------- */
.hero{padding:88px 0 84px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero-title{
  font-size:clamp(2.1rem,4.4vw,3.4rem);line-height:1.16;letter-spacing:-.02em;
  color:var(--ink);margin:20px 0 20px;
}
.hero-title em{font-style:normal;color:var(--accent)}
.hero-sub{font-size:17px;line-height:1.85;color:var(--text-2);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin-top:32px}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:28px;margin-top:44px;padding-top:24px;
  border-top:1px solid var(--line);
}
.hero-meta div{min-width:120px}
.hero-meta dt{font-size:12px;letter-spacing:.12em;color:var(--text-2);text-transform:uppercase}
.hero-meta dd{margin:4px 0 0;font-family:var(--serif);font-size:19px;color:var(--ink)}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;aspect-ratio:16/10;background:var(--bg)}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(12,58,58,.12),rgba(12,58,58,.42));
}
.hero-media figcaption{
  position:absolute;left:20px;bottom:18px;z-index:2;color:var(--text-invert);
  font-size:13px;letter-spacing:.02em;line-height:1.6;max-width:80%;
}
.fade-line{opacity:0;animation:fadeUp .7s ease-out forwards;animation-delay:var(--d,0s)}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* ---------- Pain points ---------- */
.pain-list{border-top:1px solid var(--line)}
.pain-item{
  display:grid;grid-template-columns:96px 1fr;gap:24px;align-items:start;
  padding:28px 0;border-bottom:1px solid var(--line);
}
.pain-num{
  font-family:var(--serif);font-size:2rem;line-height:1;color:var(--accent);
  letter-spacing:-.02em;
}
.pain-item h3{font-size:1.15rem;line-height:1.5;color:var(--ink);margin-bottom:8px}
.pain-item p{font-size:15.5px;color:var(--text-2);line-height:1.8}

/* ---------- Solution alternating ---------- */
.sol-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:36px 0}
.sol-row + .sol-row{border-top:1px solid var(--line)}
.sol-row.reverse .sol-media{order:2}
.sol-media{border-radius:var(--r-lg);overflow:hidden;aspect-ratio:4/3;background:var(--bg);border:1px solid var(--line)}
.sol-media img{width:100%;height:100%;object-fit:cover}
.sol-body h3{font-size:1.35rem;color:var(--ink);margin-bottom:14px}
.sol-body p{font-size:15.5px;color:var(--text-2);line-height:1.85;margin-bottom:18px}
.point-list{display:flex;flex-direction:column;gap:10px}
.point-list li{
  position:relative;padding-left:20px;font-size:15.5px;line-height:1.8;color:var(--text);
}
.point-list li::before{
  content:"";position:absolute;left:0;top:.72em;width:10px;height:1px;background:var(--accent);
}

/* ---------- Stats ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.stat{padding:32px 24px;border-left:1px solid var(--line)}
.stat:first-child{border-left:none}
.stat-num{
  font-family:var(--serif);font-size:clamp(2.2rem,4.4vw,3.2rem);
  line-height:1;color:var(--ink);letter-spacing:-.02em;
}
.stat-num span{font-size:.45em;margin-left:6px;color:var(--accent);font-family:var(--sans)}
.stat p{margin-top:12px;font-size:14.5px;line-height:1.75;color:var(--text-2)}
.case-figure{margin-top:48px}
.case-figure img{border-radius:var(--r-lg);aspect-ratio:21/9;object-fit:cover;width:100%;background:var(--bg)}
.case-figure figcaption{margin-top:14px;font-size:14px;color:var(--text-2)}

/* ---------- Testimonial ---------- */
.quote-box{max-width:900px}
.quote-text{
  font-family:var(--serif);font-size:clamp(1.35rem,2.2vw,1.6rem);line-height:1.7;
  color:var(--ink);
}
.quote-meta{
  margin-top:24px;padding-top:18px;border-top:1px solid var(--line);
  font-size:14.5px;color:var(--text-2);
}
.quote-controls{display:flex;align-items:center;gap:16px;margin-top:32px}
.quote-btn{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--surface);
  color:var(--ink);display:flex;align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .22s ease,background .22s ease;
}
.quote-btn:hover{border-color:var(--accent);background:var(--accent-soft)}
.quote-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.quote-progress{flex:1;max-width:280px;height:2px;background:var(--line);position:relative;border-radius:2px}
.quote-progress i{position:absolute;left:0;top:0;bottom:0;background:var(--accent);border-radius:2px;transition:width .28s ease}

/* ---------- Cards ---------- */
.cms-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.cms-card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--shadow);transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;
}
.cms-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--accent)}
.cms-card:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.cms-card-feature{grid-column:1 / -1;flex-direction:row}
.cms-thumb{overflow:hidden;background:var(--bg);aspect-ratio:16/10}
.cms-card-feature .cms-thumb{flex:0 0 52%;aspect-ratio:auto}
.cms-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.cms-card:hover .cms-thumb img{transform:scale(1.03)}
.cms-body{padding:20px;display:flex;flex-direction:column;flex:1 1 auto;gap:12px}
.cms-card-feature .cms-body{padding:32px 32px 28px;justify-content:center}
.badge{
  display:inline-flex;align-items:center;align-self:flex-start;
  padding:3px 10px;border-radius:var(--r-sm);background:var(--accent-soft);
  color:var(--accent);font-size:12px;letter-spacing:.04em;font-weight:500;
}
.cms-title{
  font-size:1.12rem;line-height:1.5;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.cms-card-feature .cms-title{font-size:1.5rem;line-height:1.45}
.cms-desc{
  font-size:14.5px;line-height:1.75;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.cms-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13.5px;color:var(--text-2);
}
.cms-read{display:inline-flex;align-items:center;gap:6px;color:var(--accent);font-weight:500}
.cms-read svg{width:14px;height:14px}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-lg);padding:48px 24px;
  text-align:center;color:var(--text-2);font-size:15px;background:var(--surface);
}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);max-width:920px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;
  gap:20px;padding:18px 0;background:transparent;border:none;cursor:pointer;
  font-family:var(--serif);font-size:1.05rem;color:var(--ink);text-align:left;
  transition:color .22s ease;
}
.faq-q:hover{color:var(--accent)}
.faq-q:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.faq-q .faq-icon{
  width:20px;height:20px;flex:0 0 20px;transition:transform .26s ease;color:var(--accent);
}
.faq-item.is-open .faq-q .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 0 20px;font-size:15px;line-height:1.85;color:var(--text-2);max-width:760px}

/* ---------- CTA ---------- */
.cta-dark{
  position:relative;background:var(--ink);color:var(--text-invert);overflow:hidden;
  border-radius:var(--r-lg);padding:64px 56px;
}
.cta-dark::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.22;
}
.cta-dark::after{content:"";position:absolute;inset:0;background:rgba(12,58,58,.62)}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:start}
.cta-inner h2{font-size:clamp(1.6rem,2.5vw,2.1rem);line-height:1.3;color:#fff;margin-bottom:14px}
.cta-inner p{font-size:15.5px;line-height:1.85;color:rgba(242,245,244,.82);max-width:480px}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;margin-top:28px}
.form-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--r-md);padding:24px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:rgba(242,245,244,.72);margin-bottom:8px;letter-spacing:.02em}
.field input,.field textarea{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.05);
  color:var(--text-invert);font-size:15px;transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:92px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:rgba(242,245,244,.42)}
.field input:focus,.field textarea:focus{
  outline:none;border-color:#fff;box-shadow:0 0 0 2px rgba(224,112,60,.45);
}
.form-note{font-size:12.5px;color:rgba(242,245,244,.6);margin-top:12px;line-height:1.7}
.form-msg{
  display:none;margin-top:14px;padding:10px 14px;border-radius:var(--r-sm);
  background:rgba(224,112,60,.16);border:1px solid rgba(224,112,60,.4);
  font-size:13.5px;color:#fff;
}
.form-msg.is-show{display:block}

/* ---------- Footer ---------- */
.footer{background:var(--ink);color:var(--text-invert);margin-top:0}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;
  padding:72px 0 40px;border-top:1px solid rgba(255,255,255,.12);
}
.footer h3{font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:.04em;font-family:var(--sans);font-weight:600}
.footer p{font-size:14px;line-height:1.85;color:rgba(242,245,244,.72)}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.16)}
.footer-nav{display:flex;flex-direction:column;gap:10px}
.footer-nav a,.footer-contact a{font-size:14px;color:rgba(242,245,244,.72);transition:color .2s ease}
.footer-nav a:hover,.footer-contact a:hover{color:#fff;text-decoration:underline}
.footer-contact{display:flex;flex-direction:column;gap:10px}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 0 32px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(242,245,244,.6);
}
.footer-bottom a{color:rgba(242,245,244,.72);border-bottom:1px solid rgba(242,245,244,.28)}
.footer-bottom a:hover{color:#fff;border-color:var(--accent)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s ease-out,transform .6s ease-out}
.reveal.is-in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (min-width:1024px) and (max-width:1279px){
  :root{--sidebar-w:76px}
  .brand-text{display:none}
  .sidebar-top{justify-content:center;padding:0}
  .side-nav{padding:16px 10px}
  .nav-item{justify-content:center;padding:0}
  .nav-item .nav-label{
    position:absolute;left:calc(var(--sidebar-w) - 2px);top:50%;transform:translateY(-50%);
    background:var(--surface);color:var(--text);border:1px solid var(--line);
    border-radius:var(--r-sm);padding:6px 12px;font-size:13px;font-weight:500;
    box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .2s ease;
    z-index:5;
  }
  .nav-item:hover .nav-label,.nav-item:focus-visible .nav-label{opacity:1}
  .sidebar-foot{display:none}
  .container{padding:0 32px}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .topbar{display:flex}
  .main{margin-left:0;padding-top:60px}
  .container{padding:0 24px}
  .section{padding:72px 0}
  .section-tight{padding:56px 0}
  .hero{padding:56px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-media{max-width:640px}
  .sol-row{grid-template-columns:1fr;gap:28px;padding:28px 0}
  .sol-row.reverse .sol-media{order:0}
  .sol-media{aspect-ratio:16/10}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat{border-left:none;border-top:1px solid var(--line);padding:26px 0}
  .stat:nth-child(odd){padding-right:20px}
  .stat:nth-child(even){padding-left:20px;border-left:1px solid var(--line)}
  .stat:first-child,.stat:nth-child(2){border-top:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:56px 0 32px}
  .cta-dark{padding:44px 28px}
  .cta-inner{grid-template-columns:1fr;gap:32px}
}
@media (max-width:767px){
  .cms-grid{grid-template-columns:1fr}
  .cms-card-feature{flex-direction:column}
  .cms-card-feature .cms-thumb{flex:none;aspect-ratio:16/10}
  .cms-card-feature .cms-body{padding:20px}
  .pain-item{grid-template-columns:60px 1fr;gap:16px}
  .pain-num{font-size:1.6rem}
  .stats{grid-template-columns:1fr}
  .stat{padding:24px 0;border-left:none;border-top:1px solid var(--line)}
  .stat:nth-child(odd),.stat:nth-child(even){padding-left:0;padding-right:0;border-left:none}
  .stat:first-child{border-top:none}
  .sec-head{margin-bottom:32px}
}
@media (max-width:520px){
  html body{font-size:16px}
  .container{padding:0 20px}
  .hero-title{font-size:1.9rem}
  .hero-meta{gap:20px}
  .hero-actions{gap:14px}
  .btn{width:100%}
  .hero-actions .btn{width:100%}
  .link-arrow{width:auto}
  .footer-grid{grid-template-columns:1fr;padding:44px 0 28px}
  .cta-dark{padding:36px 20px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
}
@media (prefers-reduced-motion: reduce){
  *{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
  .fade-line{opacity:1}
}

/* roulang page: category1 */
:root{
    --ink:#0C3A3A;
    --ink-2:#14524F;
    --ink-3:#2C6B65;
    --accent:#E0703C;
    --accent-soft:#F6E3D8;
    --bg:#F7F6F3;
    --surface:#FFFFFF;
    --line:#E4E1DA;
    --text:#15191A;
    --text-2:#5A625F;
    --text-invert:#F2F5F4;
    --error:#A63D2F;
    --r-sm:6px;
    --r-md:10px;
    --r-lg:16px;
    --shadow-sm:0 1px 2px rgba(12,58,58,.06);
    --shadow-md:0 10px 28px rgba(12,58,58,.10);
    --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
    --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
    --sidebar-w:260px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:var(--font-body);
    font-size:17px;
    line-height:1.85;
    text-align:left;
  }
  h1,h2,h3,h4{font-family:var(--font-display);color:var(--ink);margin:0;font-weight:600;}
  p{margin:0;}
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  button{font-family:inherit;font-size:inherit;cursor:pointer;border:none;background:none;color:inherit;}
  input,textarea{font-family:inherit;font-size:16px;color:var(--text);}
  ul,ol{margin:0;padding:0;list-style:none;}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

  .container{max-width:1180px;margin:0 auto;padding:0 48px;}

  /* ============ 侧边导航（App Shell） ============ */
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
    background:var(--ink);color:var(--text-invert);
    display:flex;flex-direction:column;
    z-index:60;
    border-right:1px solid rgba(255,255,255,.06);
  }
  .sidebar-head{
    height:88px;display:flex;align-items:center;justify-content:space-between;
    padding:0 20px;border-bottom:1px solid rgba(255,255,255,.08);flex:0 0 auto;
  }
  .brand{display:flex;align-items:center;gap:12px;min-width:0;}
  .brand-mark{
    width:38px;height:38px;flex:0 0 38px;border-radius:var(--r-md);
    display:flex;align-items:center;justify-content:center;
    background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
    color:var(--text-invert);
  }
  .brand-mark svg{width:22px;height:22px;}
  .brand-name{
    font-family:var(--font-display);font-size:18px;letter-spacing:.01em;
    color:var(--text-invert);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  }
  .menu-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;color:var(--text-invert);border-radius:var(--r-sm);}
  .menu-toggle svg{width:22px;height:22px;}

  .sidebar-panel{flex:1 1 auto;display:flex;flex-direction:column;min-height:0;}

  .side-nav{padding:20px 12px;display:flex;flex-direction:column;gap:6px;}
  .nav-item{
    position:relative;display:flex;align-items:center;gap:12px;
    height:44px;padding:0 16px;border-radius:var(--r-sm);
    font-size:15px;color:rgba(242,245,244,.72);
    transition:background .22s ease-out,color .22s ease-out;
  }
  .nav-item:hover{color:var(--text-invert);background:rgba(255,255,255,.06);}
  .nav-item.is-active{color:var(--text-invert);font-weight:600;background:rgba(255,255,255,.05);}
  .nav-item.is-active::before{
    content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
    background:var(--accent);border-radius:2px;
  }
  .nav-icon{width:20px;height:20px;flex:0 0 20px;}
  .nav-label{white-space:nowrap;}

  .sidebar-foot{
    margin-top:auto;padding:20px;border-top:1px solid rgba(255,255,255,.10);
    font-size:13px;line-height:1.7;color:rgba(242,245,244,.62);
    display:flex;flex-direction:column;gap:6px;
  }
  .sidebar-foot a{color:rgba(242,245,244,.82);border-bottom:1px solid rgba(255,255,255,.18);padding-bottom:1px;}
  .sidebar-foot a:hover{color:#fff;}

  .drawer-mask{
    position:fixed;inset:0;background:rgba(12,58,58,.45);
    opacity:0;visibility:hidden;transition:opacity .24s ease-out,visibility .24s;z-index:55;
  }
  .drawer-mask.show{opacity:1;visibility:visible;}

  /* ============ 主内容壳 ============ */
  .shell{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column;}
  main{flex:1 1 auto;}

  /* ============ Hero 压缩条 ============ */
  .hero-compact{
    position:relative;overflow:hidden;background:var(--ink);
    min-height:380px;display:flex;align-items:center;
  }
  .hero-compact .hero-bg{
    position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;
    opacity:.42;
  }
  .hero-compact::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(100deg,rgba(12,58,58,.92) 0%,rgba(12,58,58,.72) 52%,rgba(12,58,58,.42) 100%);
  }
  .hero-inner{position:relative;z-index:2;width:100%;padding:72px 0;}
  .eyebrow{
    display:inline-block;font-size:12px;letter-spacing:.16em;text-transform:uppercase;
    color:var(--accent);font-weight:600;margin-bottom:16px;
  }
  .hero-compact h1{
    font-size:clamp(2.1rem,4.2vw,3.2rem);line-height:1.16;letter-spacing:-.02em;
    color:#fff;margin-bottom:18px;max-width:16em;
  }
  .hero-compact .hero-sub{
    max-width:46em;color:rgba(242,245,244,.86);font-size:17px;line-height:1.85;
  }
  .hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin-top:32px;}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:var(--r-md);
    font-size:15px;font-weight:500;letter-spacing:.01em;
    transition:background .24s ease-out,color .24s ease-out,transform .24s ease-out,border-color .24s ease-out;
  }
  .btn-primary{background:var(--ink);color:var(--text-invert);}
  .btn-primary:hover{background:var(--ink-2);}
  .btn-primary:active{transform:translateY(1px);}
  .btn-primary svg{width:16px;height:16px;transition:transform .24s ease-out;}
  .btn-primary:hover svg{transform:translateX(4px);}
  .btn-outline{border:1px solid var(--ink);color:var(--ink);background:transparent;}
  .btn-outline:hover{background:var(--ink);color:var(--text-invert);}
  .btn-on-dark{background:#fff;color:var(--ink);}
  .btn-on-dark:hover{background:var(--accent-soft);}
  .btn-ghost{height:48px;padding:0;color:var(--accent);font-weight:500;display:inline-flex;align-items:center;gap:8px;}
  .btn-ghost span.line{position:relative;}
  .btn-ghost span.line::after{
    content:"";position:absolute;left:0;bottom:-3px;height:1px;width:0;background:var(--accent);
    transition:width .24s ease-out;
  }
  .btn-ghost:hover span.line::after{width:100%;}
  .btn-ghost svg{width:14px;height:14px;transition:transform .24s ease-out;}
  .btn-ghost:hover svg{transform:translateX(4px);}
  .btn-ghost.is-on-dark{color:var(--accent-soft);}
  .btn-ghost.is-on-dark span.line::after{background:var(--accent-soft);}

  /* ============ 面包屑 ============ */
  .breadcrumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:14px;color:var(--text-2);padding:24px 0 0;
  }
  .breadcrumb a{color:var(--text-2);}
  .breadcrumb a:hover{color:var(--accent);}
  .breadcrumb .sep{color:var(--line);}
  .breadcrumb .current{color:var(--text-2);}

  /* ============ 分类主体：左粘性目录 + 右分组条目 ============ */
  .cat-layout{
    display:grid;grid-template-columns:240px 1fr;gap:48px;
    padding:40px 0 96px;align-items:start;
  }
  .toc{
    position:sticky;top:88px;padding-right:8px;
  }
  .toc-title{
    font-size:13px;letter-spacing:.02em;color:var(--text-2);margin-bottom:14px;
    padding-bottom:12px;border-bottom:1px solid var(--line);
  }
  .toc-list{display:flex;flex-direction:column;gap:2px;}
  .toc-link{
    position:relative;display:block;padding:9px 14px;font-size:15px;color:var(--text-2);
    border-radius:var(--r-sm);transition:color .2s ease-out,background .2s ease-out;
  }
  .toc-link:hover{color:var(--ink);background:rgba(12,58,58,.04);}
  .toc-link.is-current{color:var(--ink);font-weight:600;background:rgba(224,112,60,.08);}
  .toc-link.is-current::before{
    content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:2px;background:var(--accent);
  }
  .toc-note{
    margin-top:24px;padding:16px;background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-lg);font-size:13px;line-height:1.8;color:var(--text-2);
  }

  .group-stack{display:flex;flex-direction:column;gap:64px;min-width:0;}
  .group h2{
    font-size:clamp(1.5rem,2.4vw,1.95rem);line-height:1.3;letter-spacing:-.01em;
    padding-top:8px;margin-bottom:14px;
  }
  .group-lead{color:var(--text-2);max-width:44em;margin-bottom:24px;}
  .num-list{display:flex;flex-direction:column;}
  .num-item{
    display:grid;grid-template-columns:44px 1fr;gap:16px;
    padding:20px 0;border-top:1px solid var(--line);
  }
  .num-item:last-child{border-bottom:1px solid var(--line);}
  .num-item .idx{
    font-family:var(--font-display);font-size:20px;color:var(--accent);line-height:1.4;
  }
  .num-item h3{font-size:1.12rem;line-height:1.5;margin-bottom:6px;}
  .num-item p{font-size:15.5px;color:var(--text-2);line-height:1.8;}

  .badge{
    display:inline-block;padding:4px 10px;border-radius:var(--r-sm);
    background:var(--accent-soft);color:#B2511F;font-size:12px;letter-spacing:.02em;
  }
  .tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}

  /* ============ 图片断点 ============ */
  .figure-block{padding:0 0 8px;}
  .figure-block figure{margin:0;}
  .figure-block img{
    width:100%;aspect-ratio:21/9;object-fit:cover;border-radius:var(--r-lg);
    background:var(--bg);border:1px solid var(--line);
  }
  .figure-block figcaption{font-size:14px;color:var(--text-2);margin-top:12px;}

  /* ============ 数据条 ============ */
  .stat-band{
    display:grid;grid-template-columns:repeat(4,1fr);
    border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    margin:0 0 8px;
  }
  .stat-cell{padding:28px 20px;border-right:1px solid var(--line);}
  .stat-cell:last-child{border-right:none;}
  .stat-cell .num{
    font-family:var(--font-display);font-size:clamp(2.1rem,4vw,2.9rem);line-height:1.1;
    color:var(--ink);display:block;margin-bottom:8px;
  }
  .stat-cell .cap{font-size:14px;color:var(--text-2);line-height:1.7;}

  /* ============ FAQ ============ */
  .faq-block{padding:0 0 96px;}
  .section-head{margin-bottom:28px;}
  .section-head h2{font-size:clamp(1.6rem,2.6vw,2.1rem);line-height:1.25;margin-bottom:12px;}
  .section-head p{color:var(--text-2);max-width:44em;}
  .faq-item{border-top:1px solid var(--line);}
  .faq-item:last-child{border-bottom:1px solid var(--line);}
  .faq-q{
    width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;
    gap:20px;padding:16px 0;text-align:left;font-size:16px;font-weight:500;color:var(--ink);
    font-family:var(--font-body);
  }
  .faq-q:hover{color:var(--accent);}
  .faq-q .plus{
    width:20px;height:20px;flex:0 0 20px;position:relative;transition:transform .24s ease-out;
  }
  .faq-q .plus::before,.faq-q .plus::after{
    content:"";position:absolute;background:currentColor;border-radius:1px;
  }
  .faq-q .plus::before{left:0;right:0;top:9px;height:2px;}
  .faq-q .plus::after{top:0;bottom:0;left:9px;width:2px;}
  .faq-item.is-open .faq-q .plus{transform:rotate(45deg);}
  .faq-a{
    max-height:0;overflow:hidden;transition:max-height .28s ease-out;
  }
  .faq-a p{padding:0 0 20px;font-size:15px;line-height:1.85;color:var(--text-2);max-width:52em;}

  /* ============ 深色 CTA + 表单 ============ */
  .cta-panel{
    position:relative;background:var(--ink);color:var(--text-invert);
    border-radius:var(--r-lg);overflow:hidden;padding:56px 48px;
  }
  .cta-panel .cta-bg{
    position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.22;
  }
  .cta-panel::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(115deg,rgba(12,58,58,.94),rgba(20,82,79,.82));
  }
  .cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:start;}
  .cta-inner h2{color:#fff;font-size:clamp(1.5rem,2.4vw,2rem);line-height:1.3;margin-bottom:14px;}
  .cta-inner p{color:rgba(242,245,244,.82);font-size:15.5px;max-width:30em;}
  .cta-list{margin-top:24px;display:flex;flex-direction:column;gap:10px;font-size:15px;color:rgba(242,245,244,.82);}
  .cta-list li{display:flex;gap:10px;align-items:flex-start;}
  .cta-list li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);margin-top:11px;flex:0 0 6px;}

  .form-card{
    background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
    border-radius:var(--r-lg);padding:28px;
  }
  .form-field{margin-bottom:18px;}
  .form-field label{
    display:block;font-size:13px;color:rgba(242,245,244,.72);margin-bottom:8px;letter-spacing:.02em;
  }
  .form-field input,.form-field textarea{
    width:100%;height:48px;padding:0 14px;border-radius:var(--r-sm);
    background:rgba(255,255,255,.94);border:1px solid rgba(255,255,255,.30);
    transition:border-color .2s ease-out,box-shadow .2s ease-out;
  }
  .form-field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.7;}
  .form-field input:focus,.form-field textarea:focus{
    outline:none;border-color:var(--ink);box-shadow:0 0 0 2px rgba(246,227,216,.55);
  }
  .form-field.has-error input,.form-field.has-error textarea{border-color:var(--error);}
  .form-error{display:none;font-size:13px;color:#F0A99B;margin-top:8px;}
  .form-field.has-error .form-error{display:block;}
  .form-card .btn-primary{width:100%;background:var(--accent);}
  .form-card .btn-primary:hover{background:#C95F2E;}
  .form-note{font-size:13px;color:rgba(242,245,244,.6);margin-top:14px;line-height:1.7;}

  /* ============ 页脚 ============ */
  .footer{background:var(--ink);color:var(--text-invert);margin-top:96px;padding:56px 0 24px;}
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
  .footer h3{font-size:14px;letter-spacing:.02em;color:rgba(242,245,244,.66);font-family:var(--font-body);font-weight:500;margin-bottom:16px;}
  .footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
  .footer-brand .brand-mark{background:rgba(255,255,255,.07);}
  .footer p{font-size:14px;color:rgba(242,245,244,.72);line-height:1.85;max-width:30em;}
  .footer-nav{display:flex;flex-direction:column;gap:10px;}
  .footer-nav a{font-size:14px;color:rgba(242,245,244,.72);transition:color .2s ease-out;}
  .footer-nav a:hover{color:#fff;text-decoration:underline;}
  .footer-contact{display:flex;flex-direction:column;gap:10px;font-size:14px;}
  .footer-contact a{color:rgba(242,245,244,.72);}
  .footer-contact a:hover{color:#fff;text-decoration:underline;}
  .footer-bottom{
    margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
    font-size:13px;color:rgba(242,245,244,.6);
  }
  .footer-bottom a{color:rgba(242,245,244,.8);}
  .footer-bottom a:hover{color:#fff;text-decoration:underline;}

  /* ============ 进入视口动效 ============ */
  [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .5s ease-out,transform .5s ease-out;}
  [data-reveal].is-visible{opacity:1;transform:none;}

  /* ============ 断点：1024–1279 窄栏 ============ */
  @media (max-width:1279px) and (min-width:1024px){
    :root{--sidebar-w:76px;}
    .sidebar-head{justify-content:center;padding:0;}
    .brand-name{display:none;}
    .side-nav{padding:20px 10px;}
    .nav-item{justify-content:center;padding:0;}
    .nav-label{
      position:absolute;left:calc(100% + 10px);top:50%;transform:translateY(-50%);
      background:var(--surface);color:var(--ink);border:1px solid var(--line);
      padding:6px 12px;border-radius:var(--r-sm);font-size:13px;white-space:nowrap;
      opacity:0;visibility:hidden;transition:opacity .2s ease-out;box-shadow:var(--shadow-sm);
    }
    .nav-item:hover .nav-label,.nav-item:focus-visible .nav-label{opacity:1;visibility:visible;}
    .sidebar-foot{padding:16px 10px;text-align:center;font-size:12px;}
    .sidebar-foot .foot-text{display:none;}
    .cat-layout{grid-template-columns:220px 1fr;gap:36px;}
    .container{padding:0 40px;}
  }

  /* ============ 断点：<1024 顶部栏 + 抽屉 ============ */
  @media (max-width:1023px){
    :root{--sidebar-w:0px;}
    body{font-size:16px;}
    .container{padding:0 32px;}
    .sidebar{
      left:0;right:0;bottom:auto;width:100%;height:60px;flex-direction:row;align-items:center;
      background:rgba(12,58,58,.94);backdrop-filter:blur(8px);
    }
    .sidebar-head{height:60px;width:100%;border-bottom:none;padding:0 20px;}
    .menu-toggle{display:inline-flex;}
    .sidebar-panel{
      position:fixed;top:60px;left:0;right:0;
      max-height:calc(100vh - 60px);overflow-y:auto;
      background:var(--ink);border-top:1px solid rgba(255,255,255,.10);
      transform:translateY(-10px);opacity:0;visibility:hidden;
      transition:transform .24s ease-out,opacity .24s ease-out,visibility .24s;
    }
    .sidebar.is-open .sidebar-panel{transform:none;opacity:1;visibility:visible;}
    .sidebar-foot{margin-top:0;border-top:1px solid rgba(255,255,255,.10);}
    .shell{margin-left:0;padding-top:60px;}
    .hero-compact{min-height:0;}
    .hero-inner{padding:44px 0 40px;}
    .hero-compact .hero-bg{height:260px;bottom:auto;top:0;opacity:.30;}
    .hero-compact{min-height:260px;}
    .hero-compact::after{
      background:linear-gradient(180deg,rgba(12,58,58,.86),rgba(12,58,58,.96));
    }
    .cat-layout{grid-template-columns:1fr;gap:32px;padding:28px 0 72px;}
    .toc{position:static;padding-right:0;}
    .toc-list{flex-direction:row;overflow-x:auto;gap:8px;padding-bottom:6px;}
    .toc-link{white-space:nowrap;border:1px solid var(--line);background:var(--surface);}
    .toc-link.is-current::before{display:none;}
    .toc-note{display:none;}
    .group-stack{gap:48px;}
    .stat-band{grid-template-columns:repeat(2,1fr);}
    .stat-cell:nth-child(2){border-right:none;}
    .stat-cell:nth-child(1),.stat-cell:nth-child(2){border-bottom:1px solid var(--line);}
    .cta-inner{grid-template-columns:1fr;gap:32px;}
    .cta-panel{padding:40px 28px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
    .faq-block{padding-bottom:72px;}
  }

  @media (max-width:767px){
    .container{padding:0 20px;}
    .figure-block img{aspect-ratio:16/9;}
    .num-item{grid-template-columns:34px 1fr;gap:12px;}
    .stat-band{grid-template-columns:1fr;}
    .stat-cell{border-right:none;border-bottom:1px solid var(--line);}
    .stat-cell:last-child{border-bottom:none;}
    .footer-grid{grid-template-columns:1fr;}
    .footer{margin-top:64px;}
    .section-head h2{font-size:1.5rem;}
    .hero-compact h1{font-size:1.8rem;}
    .hero-actions{gap:16px;margin-top:24px;}
    .btn{width:100%;}
    .hero-actions .btn-ghost{width:auto;}
  }

  @media (prefers-reduced-motion:reduce){
    *{animation:none !important;transition:none !important;}
    [data-reveal]{opacity:1;transform:none;}
  }

/* roulang page: article */
:root{
    --ink:#0C3A3A;
    --ink-2:#14524F;
    --ink-3:#2C6B65;
    --accent:#E0703C;
    --accent-deep:#B4522A;
    --accent-soft:#F6E3D8;
    --bg:#F7F6F3;
    --surface:#FFFFFF;
    --line:#E4E1DA;
    --text:#15191A;
    --text-2:#5A625F;
    --text-invert:#F2F5F4;
    --error:#A63D2F;
    --r-sm:6px;
    --r-md:10px;
    --r-lg:16px;
    --shadow:0 1px 2px rgba(12,58,58,.06);
    --shadow-hover:0 10px 28px rgba(12,58,58,.10);
    --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
    --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  html body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:var(--sans);
    font-size:17px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  html img{display:block;max-width:100%;height:auto}
  h1,h2,h3,h4{font-family:var(--serif);font-weight:600;margin:0;letter-spacing:-.01em}
  p{margin:0}
  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}
  .skip-link{
    position:absolute;left:16px;top:-48px;z-index:99;
    background:var(--ink);color:var(--text-invert);
    padding:10px 16px;border-radius:var(--r-sm);font-size:14px;
    transition:top .2s ease-out;
  }
  .skip-link:focus{top:12px}
  a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
  [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .55s ease-out,transform .55s ease-out}
  [data-reveal].is-visible{opacity:1;transform:none}

  /* ---------- 侧栏导航 ---------- */
  .app-sidebar{
    position:fixed;top:0;left:0;bottom:0;width:260px;z-index:60;
    background:var(--ink);
    display:flex;flex-direction:column;
    border-right:1px solid rgba(255,255,255,.08);
    padding-bottom:20px;
  }
  .sidebar-top{
    flex:0 0 auto;height:88px;display:flex;align-items:center;justify-content:space-between;
    gap:12px;padding:0 20px;border-bottom:1px solid rgba(255,255,255,.10);
  }
  .brand{display:flex;align-items:center;gap:10px;color:var(--text-invert)}
  .brand-mark{
    width:34px;height:34px;flex:0 0 auto;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    border:1px solid rgba(255,255,255,.24);color:var(--accent-soft);
  }
  .brand-mark svg{width:20px;height:20px}
  .brand-name{font-family:var(--serif);font-size:17px;letter-spacing:.02em;white-space:nowrap}
  .nav-toggle{
    display:none;width:44px;height:44px;align-items:center;justify-content:center;
    border:1px solid rgba(255,255,255,.18);border-radius:var(--r-sm);color:var(--text-invert);
  }
  .side-nav{flex:1 1 auto;display:flex;flex-direction:column;gap:4px;padding:20px 12px;overflow-y:auto}
  .nav-item{
    position:relative;display:flex;align-items:center;gap:12px;
    min-height:44px;padding:0 14px;border-radius:var(--r-sm);
    color:rgba(242,245,244,.72);font-size:15px;
    transition:background .2s ease-out,color .2s ease-out;
  }
  .nav-item:hover{color:#fff;background:rgba(255,255,255,.06)}
  .nav-item.is-active{color:#fff;font-weight:600;background:rgba(255,255,255,.08)}
  .nav-item.is-active::before{
    content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;
    border-radius:2px;background:var(--accent);
  }
  .nav-icon{width:20px;height:20px;flex:0 0 auto}
  .nav-label{white-space:nowrap}
  .sidebar-foot{
    flex:0 0 auto;margin:0 12px;padding:16px;
    border:1px solid rgba(255,255,255,.10);border-radius:var(--r-md);
    color:rgba(242,245,244,.72);font-size:13px;line-height:1.7;
    display:flex;flex-direction:column;gap:6px;
  }
  .sidebar-foot a{color:var(--text-invert);word-break:break-all}
  .sidebar-foot a:hover{text-decoration:underline}
  .sidebar-mask{
    display:none;position:fixed;inset:0;z-index:55;
    background:rgba(12,58,58,.45);opacity:0;pointer-events:none;
    transition:opacity .24s ease-out;
  }
  body.nav-open{overflow:hidden}

  /* ---------- 主内容外壳 ---------- */
  .main-wrap{
    margin-left:260px;min-height:100vh;
    display:flex;flex-direction:column;
  }
  .main-wrap .container,.footer .container{
    width:100%;max-width:1180px;margin:0 auto;padding:0 48px;
  }

  /* ---------- 文章头部 ---------- */
  .article-hero{
    position:relative;overflow:hidden;color:var(--text-invert);
    background:var(--ink) url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    padding:56px 0 52px;
  }
  .article-hero::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(160deg,rgba(12,58,58,.88) 0%,rgba(12,58,58,.96) 72%,rgba(20,82,79,.94) 100%);
  }
  .article-hero .container{position:relative;z-index:2}
  .breadcrumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:14px;color:rgba(242,245,244,.7);margin-bottom:24px;
  }
  .breadcrumb a{transition:color .2s ease-out}
  .breadcrumb a:hover{color:#fff;text-decoration:underline}
  .breadcrumb .sep{color:rgba(242,245,244,.4)}
  .breadcrumb .current{color:rgba(242,245,244,.92);max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .eyebrow{
    font-size:12px;letter-spacing:.16em;text-transform:uppercase;
    color:var(--accent-soft);margin-bottom:14px;
  }
  .article-hero h1{
    font-size:clamp(1.9rem,3.6vw,2.9rem);line-height:1.25;
    color:#fff;max-width:920px;margin-bottom:20px;
  }
  .article-meta{
    display:flex;flex-wrap:wrap;align-items:center;gap:12px;
    font-size:14px;color:rgba(242,245,244,.74);letter-spacing:.02em;
  }
  .article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--accent)}

  /* ---------- 正文区 ---------- */
  .article-shell{padding:56px 0 88px}
  .article-card{
    max-width:840px;margin:0 auto;background:var(--surface);
    border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--shadow);padding:48px 56px;
  }
  .article-body{color:var(--text)}
  .article-body p{font-size:17px;line-height:1.9;margin:0 0 1.4em}
  .article-body > p:first-child{
    border-left:2px solid var(--accent);padding-left:16px;color:var(--text-2);
  }
  .article-body h2{font-size:1.7rem;line-height:1.3;margin:48px 0 16px}
  .article-body h3{font-size:1.25rem;line-height:1.4;margin:32px 0 12px}
  .article-body h4{font-size:1.08rem;line-height:1.5;margin:24px 0 10px}
  .article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.4em}
  .article-body ul{list-style:disc}
  .article-body ol{list-style:decimal}
  .article-body li{margin-bottom:8px;line-height:1.85;font-size:17px}
  .article-body strong{color:var(--ink);font-weight:600}
  .article-body a{color:var(--accent-deep);text-decoration:underline;text-underline-offset:3px}
  .article-body a:hover{color:var(--accent)}
  .article-body blockquote{
    margin:24px 0;padding:20px 22px;
    border-left:3px solid var(--accent);background:var(--bg);
    border-radius:0 var(--r-md) var(--r-md) 0;color:var(--text-2);
  }
  .article-body blockquote p:last-child{margin-bottom:0}
  .article-body img{border-radius:var(--r-md);margin:24px auto}
  .article-body figure{margin:24px 0}
  .article-body figcaption{
    font-size:13px;color:var(--text-2);text-align:center;margin-top:10px;
  }
  .article-body pre{
    background:var(--ink);color:#E8F0EE;padding:18px 20px;
    border-radius:var(--r-sm);overflow-x:auto;
    font-size:14px;line-height:1.7;margin:0 0 1.4em;
  }
  .article-body code{
    font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
    font-size:.92em;background:var(--bg);border-radius:4px;padding:2px 6px;
  }
  .article-body pre code{background:none;padding:0;color:inherit}
  .article-body table{
    width:100%;border-collapse:collapse;margin:0 0 1.4em;font-size:15px;
  }
  .article-body th,.article-body td{
    border:1px solid var(--line);padding:12px 16px;text-align:left;line-height:1.7;
  }
  .article-body th{background:var(--bg);font-weight:600;color:var(--ink)}
  .article-foot{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
    gap:16px;margin-top:44px;padding-top:24px;border-top:1px solid var(--line);
  }
  .tag-row{display:flex;flex-wrap:wrap;gap:8px}
  .badge{
    display:inline-flex;align-items:center;height:26px;padding:0 10px;
    border-radius:var(--r-sm);background:var(--accent-soft);color:var(--accent-deep);
    font-size:12px;letter-spacing:.02em;white-space:nowrap;
  }
  .link-arrow{
    position:relative;display:inline-flex;align-items:center;gap:6px;
    color:var(--accent-deep);font-size:15px;
  }
  .link-arrow::after{
    content:"";position:absolute;left:0;bottom:-3px;height:1px;width:100%;
    background:currentColor;transform:scaleX(0);transform-origin:left;
    transition:transform .24s ease-out;
  }
  .link-arrow:hover::after{transform:scaleX(1)}
  .link-arrow svg{width:14px;height:14px;transition:transform .2s ease-out}
  .link-arrow:hover svg{transform:translateX(4px)}
  .link-light{color:var(--accent-soft)}

  .empty-state{
    border:1px dashed var(--line);border-radius:var(--r-lg);
    background:var(--bg);padding:48px 24px;text-align:center;
  }
  .empty-state h2{font-size:1.5rem;margin-bottom:12px}
  .empty-state p{color:var(--text-2);font-size:15px;margin-bottom:24px}

  /* ---------- 按钮 ---------- */
  .btn-primary{
    display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 24px;
    border-radius:var(--r-md);background:var(--ink);color:var(--text-invert);
    font-size:15px;font-weight:500;
    transition:background .2s ease-out,transform .12s ease-out;
  }
  .btn-primary:hover{background:var(--ink-2)}
  .btn-primary:active{transform:translateY(1px)}
  .btn-primary svg{width:16px;height:16px;transition:transform .2s ease-out}
  .btn-primary:hover svg{transform:translateX(4px)}
  .btn-light{background:var(--surface);color:var(--ink)}
  .btn-light:hover{background:#EDEAE3;color:var(--ink)}

  /* ---------- 延伸阅读 ---------- */
  .related{margin-top:72px}
  .section-head{max-width:660px;margin-bottom:28px}
  .section-head h2{font-size:1.65rem;margin-bottom:10px}
  .section-head p{color:var(--text-2);font-size:15px}
  .card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
  .post-card{
    display:flex;flex-direction:column;overflow:hidden;
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-lg);box-shadow:var(--shadow);
    transition:transform .24s ease-out,box-shadow .24s ease-out,border-color .24s ease-out;
  }
  .post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--accent)}
  .post-card .thumb{display:block;aspect-ratio:16/10;overflow:hidden;background:var(--bg)}
  .post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .34s ease-out}
  .post-card:hover .thumb img{transform:scale(1.03)}
  .post-card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
  .post-card h3{font-size:1.15rem;line-height:1.45}
  .post-card h3 a:hover{color:var(--accent-deep)}
  .post-card p{
    color:var(--text-2);font-size:15px;line-height:1.7;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .post-card .link-arrow{margin-top:auto}

  /* ---------- 深色 CTA ---------- */
  .cta-bar{
    position:relative;overflow:hidden;margin-top:64px;
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
    gap:24px;padding:40px 48px;border-radius:var(--r-lg);
    background:var(--ink);color:var(--text-invert);
  }
  .cta-bar::after{
    content:"";position:absolute;right:-120px;top:-120px;width:360px;height:360px;
    border-radius:50%;background:radial-gradient(circle,rgba(224,112,60,.22),transparent 68%);
  }
  .cta-bar > *{position:relative;z-index:2}
  .cta-bar h2{font-size:1.5rem;color:#fff;margin-bottom:10px}
  .cta-bar p{color:rgba(242,245,244,.8);font-size:15px;max-width:52ch}

  /* ---------- 页脚 ---------- */
  .footer{
    position:relative;margin-top:auto;padding:64px 0 28px;
    background:var(--ink);color:var(--text-invert);
  }
  .footer::before{
    content:"";position:absolute;top:0;left:0;right:0;height:1px;
    background:rgba(255,255,255,.12);
  }
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:40px}
  .footer h3{
    font-family:var(--sans);font-size:14px;font-weight:500;
    letter-spacing:.06em;color:rgba(242,245,244,.65);margin-bottom:16px;
  }
  .footer p{font-size:14px;line-height:1.8;color:rgba(242,245,244,.72);max-width:36ch}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
  .footer-brand .brand-mark{color:var(--accent-soft)}
  .footer-brand .brand-name{font-family:var(--serif);font-size:18px}
  .footer-nav{display:flex;flex-direction:column;gap:10px}
  .footer-nav a{font-size:14px;color:rgba(242,245,244,.7);transition:color .2s ease-out}
  .footer-nav a:hover{color:#fff;text-decoration:underline}
  .footer-contact{display:flex;flex-direction:column;gap:10px;font-size:14px}
  .footer-contact a{color:rgba(242,245,244,.7);transition:color .2s ease-out}
  .footer-contact a:hover{color:#fff;text-decoration:underline}
  .footer-bottom{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
    gap:16px;margin-top:48px;padding-top:20px;
    border-top:1px solid rgba(255,255,255,.12);
    font-size:13px;color:rgba(242,245,244,.6);
  }
  .footer-bottom a{color:rgba(242,245,244,.82);text-decoration:underline}

  /* ---------- 断点 ---------- */
  @media (max-width:1279px) and (min-width:1024px){
    .app-sidebar{width:76px;padding-bottom:16px}
    .main-wrap{margin-left:76px}
    .sidebar-top{padding:0;justify-content:center}
    .brand-name{display:none}
    .side-nav{padding:16px 8px;align-items:center;gap:8px}
    .nav-item{width:44px;padding:0;justify-content:center;gap:0}
    .nav-label{
      position:absolute;left:56px;top:50%;transform:translateY(-50%);
      background:var(--surface);color:var(--ink);border:1px solid var(--line);
      padding:6px 12px;border-radius:var(--r-sm);font-size:13px;
      opacity:0;pointer-events:none;transition:opacity .18s ease-out;
      white-space:nowrap;box-shadow:var(--shadow);z-index:70;
    }
    .nav-item:hover .nav-label,.nav-item:focus-visible .nav-label{opacity:1}
    .sidebar-foot{padding:10px;margin:0 8px;font-size:12px}
    .sidebar-foot a,.sidebar-foot span{display:none}
    .main-wrap .container,.footer .container{padding:0 32px}
  }
  @media (max-width:1023px){
    .app-sidebar{
      top:0;left:0;right:0;bottom:auto;width:auto;height:60px;
      flex-direction:row;align-items:center;padding:0 16px;
      background:rgba(12,58,58,.92);backdrop-filter:blur(8px);
      border-right:0;border-bottom:1px solid rgba(255,255,255,.10);
      transition:background .24s ease-out;
    }
    .app-sidebar.is-solid{background:var(--ink)}
    .sidebar-top{height:60px;padding:0;border-bottom:0;width:100%;justify-content:space-between}
    .brand-name{font-size:16px}
    .nav-toggle{display:flex}
    .side-nav{
      position:fixed;top:60px;right:0;width:86vw;max-width:340px;
      height:calc(100vh - 60px);background:var(--ink);
      padding:16px 12px;gap:6px;align-items:stretch;
      transform:translateX(105%);transition:transform .24s ease-out;
      box-shadow:-12px 0 32px rgba(12,58,58,.22);z-index:70;
    }
    body.nav-open .side-nav{transform:translateX(0)}
    .nav-item{width:auto;justify-content:flex-start;padding:0 14px;gap:12px}
    .nav-label{position:static;opacity:1;transform:none;background:none;border:0;box-shadow:none;padding:0;color:inherit}
    .sidebar-foot{display:none}
    .sidebar-mask{display:block}
    body.nav-open .sidebar-mask{opacity:1;pointer-events:auto}
    .main-wrap{margin-left:0;padding-top:60px}
    .main-wrap .container,.footer .container{padding:0 20px}
    .article-hero{padding:40px 0 36px}
    .article-shell{padding:40px 0 64px}
    .article-card{padding:36px 32px}
    .cta-bar{padding:32px 28px}
  }
  @media (max-width:900px){
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  }
  @media (max-width:768px){
    .card-grid{grid-template-columns:1fr}
    .article-card{padding:28px 22px;border-radius:var(--r-md)}
    .article-body h2{font-size:1.45rem;margin-top:36px}
    .article-body h3{font-size:1.15rem}
    .article-body p,.article-body li{font-size:16px}
    .article-body table{display:block;overflow-x:auto;white-space:nowrap}
    .article-hero h1{font-size:1.72rem}
    .breadcrumb .current{white-space:normal}
    .related{margin-top:56px}
    .cta-bar{margin-top:56px}
  }
  @media (max-width:560px){
    .footer-grid{grid-template-columns:1fr}
    .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
    .article-hero{padding:32px 0 30px}
    .btn-primary{width:100%;justify-content:center}
  }
  @media (prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
    [data-reveal]{opacity:1;transform:none}
  }

/* roulang page: category2 */
:root{
  --ink:#0C3A3A;
  --ink-2:#14524F;
  --ink-3:#2C6B65;
  --accent:#E0703C;
  --accent-ink:#A9501F;
  --accent-soft:#F6E3D8;
  --bg:#F7F6F3;
  --surface:#FFFFFF;
  --line:#E4E1DA;
  --text:#15191A;
  --text-2:#5A625F;
  --text-invert:#F2F5F4;
  --error:#A63D2F;
  --r-sm:6px;
  --r-md:10px;
  --r-lg:16px;
  --shadow-1:0 1px 2px rgba(12,58,58,.06);
  --shadow-2:0 10px 28px rgba(12,58,58,.10);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --sidebar-w:260px;
}
*,*::before,*::after{box-sizing:border-box}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body h1,body h2,body h3,body h4{
  font-family:var(--serif);
  font-weight:600;
  letter-spacing:-.01em;
  margin:0;
  line-height:1.25;
  color:inherit;
}
body p{margin:0}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul{margin:0;padding:0;list-style:none}
::selection{background:var(--accent-soft);color:var(--ink)}
a:focus-visible,button:focus-visible,.nav-item:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:6px;
}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 48px}

/* ---------- 侧边导航 ---------- */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:var(--ink);
  color:var(--text-invert);
  display:flex;
  flex-direction:column;
  padding:0 20px 24px;
  z-index:60;
  transition:transform .24s ease-out;
}
.brand{height:88px;display:flex;align-items:center;gap:12px;padding:0 4px}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;
  display:grid;place-items:center;
  border:1px solid rgba(242,245,244,.28);
  border-radius:10px;
  color:var(--accent);
}
.brand-mark svg{width:22px;height:22px}
.brand-name{
  font-family:var(--serif);
  font-size:17px;
  letter-spacing:.02em;
  color:var(--text-invert);
}
.side-nav{display:flex;flex-direction:column;gap:4px;margin-top:10px;flex:1 1 auto;overflow-y:auto}
.side-nav::-webkit-scrollbar{width:4px}
.side-nav::-webkit-scrollbar-thumb{background:rgba(255,255,255,.16);border-radius:2px}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:12px;
  min-height:44px;
  padding:0 16px;
  border-radius:8px;
  font-size:15px;
  color:rgba(242,245,244,.72);
  transition:background .2s ease-out,color .2s ease-out;
}
.nav-item:hover{color:#F2F5F4;background:rgba(255,255,255,.06)}
.nav-item.is-active{color:#F2F5F4;font-weight:600;background:rgba(255,255,255,.05)}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  background:var(--accent);border-radius:999px;
}
.nav-icon{width:20px;height:20px;flex:0 0 20px}
.sidebar-foot{
  margin-top:16px;padding-top:16px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-direction:column;gap:6px;
  font-size:13px;color:rgba(242,245,244,.6);
}
.sidebar-foot a{color:rgba(242,245,244,.8);word-break:break-all}
.sidebar-foot a:hover{color:#fff;text-decoration:underline}
.sidebar-note{font-size:12px;color:rgba(242,245,244,.45);line-height:1.7}

/* ---------- 移动端顶栏与遮罩 ---------- */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:60px;
  align-items:center;justify-content:space-between;
  padding:0 20px;
  background:rgba(12,58,58,.9);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  color:var(--text-invert);
  z-index:70;
}
.topbar .brand{height:auto;padding:0}
.topbar .brand-mark{width:32px;height:32px;flex:0 0 32px}
.topbar .brand-name{font-size:16px}
.burger{
  width:44px;height:44px;display:grid;place-items:center;
  border:1px solid rgba(255,255,255,.24);border-radius:10px;
  transition:background .2s ease-out;
}
.burger:hover{background:rgba(255,255,255,.1)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(12,58,58,.45);
  opacity:0;visibility:hidden;transition:opacity .24s ease-out;
  z-index:55;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.page-main{margin-left:var(--sidebar-w)}

/* ---------- 通用排版 ---------- */
.eyebrow{
  display:inline-block;
  font-family:var(--serif);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--accent);
}
.section{padding:96px 0}
.section-tight{padding:64px 0}
.section-head{max-width:780px;margin-bottom:44px}
.section-head h2{font-size:clamp(1.6rem,2.6vw,2.2rem);margin:14px 0 14px}
.section-head p{color:var(--text-2);font-size:16px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 24px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background .2s ease-out,color .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.btn-primary{background:var(--ink);color:var(--text-invert)}
.btn-primary:hover{background:var(--ink-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-invert{background:#fff;color:var(--ink)}
.btn-invert:hover{background:var(--accent-soft);color:var(--ink)}
.btn-ghost{border:1px solid rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:#fff;color:var(--ink)}
.link-arrow{
  position:relative;
  display:inline-flex;align-items:center;gap:8px;
  color:var(--accent);font-size:15px;font-weight:600;
}
.link-arrow svg{width:14px;height:14px;transition:transform .2s ease-out}
.link-arrow:hover svg{transform:translateX(4px)}
.link-arrow::after{
  content:"";position:absolute;left:0;bottom:-4px;height:1px;width:100%;
  background:currentColor;transform:scaleX(0);transform-origin:left;
  transition:transform .28s ease-out;
}
.link-arrow:hover::after{transform:scaleX(1)}

/* ---------- 首屏横幅 ---------- */
.band{
  position:relative;
  height:420px;
  display:flex;align-items:flex-end;
  overflow:hidden;
  background:#0C3A3A url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
}
.band::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(12,58,58,.30) 0%,rgba(12,58,58,.45) 45%,rgba(12,58,58,.68) 100%);
}
.band-inner{
  position:relative;z-index:2;
  width:100%;max-width:1180px;margin:0 auto;
  padding:0 48px 56px;color:#fff;
}
.band h1{
  font-size:clamp(2.1rem,4.6vw,3.5rem);
  line-height:1.16;
  letter-spacing:-.02em;
  color:#fff;
  margin:16px 0 18px;
}
.band-lead{
  max-width:660px;
  font-size:16px;
  color:rgba(242,245,244,.9);
}
.band-actions{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin-top:30px}

/* ---------- 信息条 ---------- */
.info-wrap{position:relative;z-index:5;margin-top:-64px}
.info-strip{
  display:grid;grid-template-columns:repeat(3,1fr);
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-2);
  overflow:hidden;
}
.info-cell{padding:30px 34px;border-left:1px solid var(--line)}
.info-cell:first-child{border-left:0}
.info-cell h3{font-size:1.05rem;margin-bottom:8px}
.info-cell p{font-size:14px;color:var(--text-2);line-height:1.75}
.info-label{
  display:block;margin-bottom:10px;
  font-size:12px;letter-spacing:.12em;
  color:var(--accent);
  font-family:var(--serif);
}

/* ---------- 编号条目列表 ---------- */
.index-list{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
}
.index-list + .index-list{margin-top:64px}
.index-row{
  display:grid;
  grid-template-columns:112px 1fr;
  gap:28px;
  padding:32px 36px;
  border-top:1px solid var(--line);
  transition:background .24s ease-out;
}
.index-row:first-child{border-top:0}
.index-row:hover{background:var(--bg)}
.index-row:hover .index-num{color:var(--accent)}
.index-num{
  font-family:var(--serif);
  font-size:clamp(2rem,3.6vw,2.6rem);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--ink-3);
  transition:color .24s ease-out;
}
.index-body h3{font-size:1.3rem;margin-bottom:10px}
.index-body p{font-size:16px;color:var(--text-2);margin-bottom:14px}
.badge{
  display:inline-flex;align-items:center;
  height:26px;padding:0 12px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent-ink);
  font-size:12px;letter-spacing:.02em;
}

/* ---------- 横向大图 ---------- */
.wide-figure{margin:64px 0 0}
.wide-figure .frame{
  border-radius:var(--r-lg);
  overflow:hidden;
  background:var(--bg);
  aspect-ratio:21/9;
}
.wide-figure img{width:100%;height:100%;object-fit:cover}
.wide-figure figcaption{
  margin-top:14px;
  font-size:14px;
  color:var(--text-2);
  text-align:center;
}

/* ---------- 留言摘录 ---------- */
.quote-section{background:var(--ink);color:var(--text-invert);padding:96px 0}
.quote-section .eyebrow{color:var(--accent)}
.quote-section h2{font-size:clamp(1.5rem,2.4vw,2rem);color:#fff;margin:14px 0 36px}
.quote-card{max-width:880px}
.quote-text{
  font-family:var(--serif);
  font-size:clamp(1.35rem,2.3vw,1.65rem);
  line-height:1.65;
  color:#fff;
  min-height:132px;
}
.quote-meta{
  display:flex;align-items:center;gap:12px;
  margin-top:26px;padding-top:16px;
  border-top:1px solid rgba(255,255,255,.14);
  font-size:14px;
  color:rgba(242,245,244,.72);
}
.quote-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--accent);display:inline-block}
.quote-controls{display:flex;gap:12px;margin-top:26px}
.icon-btn{
  width:40px;height:40px;display:grid;place-items:center;
  border:1px solid rgba(255,255,255,.28);border-radius:10px;
  color:#F2F5F4;
  transition:background .2s ease-out,border-color .2s ease-out;
}
.icon-btn:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.5)}
.icon-btn svg{width:18px;height:18px}
.quote-progress{max-width:320px;height:2px;background:rgba(255,255,255,.18);margin-top:22px}
.quote-progress span{display:block;height:100%;width:50%;background:var(--accent);transition:width .28s ease-out}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;min-height:56px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:16px 4px;text-align:left;
  font-family:var(--serif);font-size:1.06rem;color:var(--text);
}
.faq-q .plus{
  position:relative;width:20px;height:20px;flex:0 0 20px;
  transition:transform .24s ease-out;
}
.faq-q .plus::before,
.faq-q .plus::after{
  content:"";position:absolute;background:var(--accent);border-radius:2px;
}
.faq-q .plus::before{left:0;right:0;top:9px;height:2px}
.faq-q .plus::after{top:0;bottom:0;left:9px;width:2px}
.faq-item.is-open .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease-out}
.faq-a-inner{
  max-width:840px;padding:0 4px 20px;
  font-size:15px;line-height:1.85;color:var(--text-2);
}

/* ---------- 深色 CTA ---------- */
.cta-dark{position:relative;background:var(--ink);color:#fff;overflow:hidden}
.cta-dark::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  opacity:.18;
}
.cta-inner{
  position:relative;z-index:2;
  display:flex;align-items:center;justify-content:space-between;
  gap:40px;flex-wrap:wrap;
  padding:88px 0;
}
.cta-inner h2{font-size:clamp(1.6rem,2.6vw,2.1rem);color:#fff;margin-bottom:12px}
.cta-inner p{max-width:580px;font-size:16px;color:rgba(242,245,244,.82)}
.cta-actions{display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.cta-dark .link-arrow{color:#F2C7AC}

/* ---------- 页脚 ---------- */
.footer{
  background:var(--ink);
  color:var(--text-invert);
  border-top:1px solid rgba(255,255,255,.12);
  padding:72px 0 32px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px}
.footer h3{font-size:15px;color:#fff;margin-bottom:18px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand .brand-mark{width:32px;height:32px;flex:0 0 32px;border-color:rgba(242,245,244,.28)}
.footer-brand .brand-name{font-size:16px;color:#F2F5F4;font-family:var(--serif)}
.footer p{font-size:14px;line-height:1.8;color:rgba(242,245,244,.72);margin-top:16px;max-width:330px}
.footer-nav,.footer-contact{display:flex;flex-direction:column;gap:10px}
.footer-nav a,.footer-contact a{font-size:14px;color:rgba(242,245,244,.72);transition:color .2s ease-out}
.footer-nav a:hover,.footer-contact a:hover{color:#fff;text-decoration:underline}
.footer-bottom{
  margin-top:56px;padding-top:20px;
  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:13px;color:rgba(242,245,244,.6);
}
.footer-bottom a{color:rgba(242,245,244,.8)}
.footer-bottom a:hover{color:#fff;text-decoration:underline}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease-out,transform .5s ease-out}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 窄栏（1024–1279） ---------- */
@media (min-width:1024px) and (max-width:1279px){
  .sidebar{width:76px;padding:0 12px 24px;overflow:visible}
  .brand{justify-content:center;padding:0}
  .brand-name{display:none}
  .nav-item{justify-content:center;padding:0}
  .nav-label{
    position:absolute;left:64px;top:50%;transform:translate(-6px,-50%);
    background:var(--surface);color:var(--ink);
    border:1px solid var(--line);border-radius:var(--r-sm);
    padding:8px 14px;font-size:14px;white-space:nowrap;
    box-shadow:var(--shadow-2);
    opacity:0;pointer-events:none;
    transition:opacity .2s ease-out,transform .2s ease-out;
  }
  .nav-item:hover .nav-label,
  .nav-item:focus-visible .nav-label{opacity:1;transform:translate(0,-50%)}
  .sidebar-foot{display:none}
  .page-main{margin-left:76px}
}

/* ---------- 平板与手机 ---------- */
@media (max-width:1023px){
  .topbar{display:flex}
  .sidebar{
    width:86vw;max-width:330px;
    transform:translateX(-100%);
    box-shadow:0 0 0 1px rgba(255,255,255,.06);
  }
  .sidebar.is-open{transform:translateX(0)}
  .brand-name{display:inline}
  .page-main{margin-left:0;padding-top:60px}
  .container{padding:0 32px}
  .band{height:360px}
  .band-inner{padding:0 32px 48px}
  .section{padding:72px 0}
  .section-tight{padding:56px 0}
  .info-strip{grid-template-columns:1fr 1fr}
  .info-cell{border-left:1px solid var(--line);border-top:1px solid var(--line)}
  .info-cell:nth-child(-n+2){border-top:0}
  .info-cell:nth-child(odd){border-left:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .cta-inner{padding:72px 0}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .band{height:320px}
  .band-inner{padding:0 20px 40px}
  .band h1{font-size:1.9rem}
  .band-lead{font-size:15px}
  .band-actions{gap:16px;margin-top:24px}
  .info-wrap{margin-top:-40px}
  .info-strip{grid-template-columns:1fr}
  .info-cell{border-left:0;border-top:1px solid var(--line);padding:24px 22px}
  .info-cell:first-child{border-top:0}
  .index-row{grid-template-columns:1fr;gap:10px;padding:26px 22px}
  .index-num{font-size:1.9rem}
  .index-body h3{font-size:1.15rem}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .wide-figure{margin-top:44px}
  .wide-figure .frame{aspect-ratio:16/9}
  .quote-section{padding:56px 0}
  .quote-text{min-height:180px;font-size:1.25rem}
  .cta-inner{padding:56px 0;gap:28px}
  .footer{padding:56px 0 28px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{margin-top:40px;flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .band{height:290px}
  .band h1{font-size:1.7rem}
  .btn{height:46px;padding:0 20px;font-size:14px}
  .btn-invert,.btn-ghost{width:100%}
  .band-actions .btn-invert{width:auto}
}
@media (min-width:1024px){
  .drawer-mask{display:none}
}
@media (prefers-reduced-motion: reduce){
  *{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
}