/* roulang page: index */
:root{
  --ink:#0B0C0E;
  --deep:#17191C;
  --accent:#E2542A;
  --accent-d:#B93F1C;
  --accent-soft:#FDEDE6;
  --secondary:#2F6F6B;
  --paper:#F6F5F2;
  --surface:#FFFFFF;
  --line:#E3E1DC;
  --muted:#6E6E73;
  --ok:#2F7A4F;
  --warn:#B7791F;
  --err:#C0392B;
  --r-s:2px;
  --r-m:4px;
  --r-l:6px;
  --sh-1:0 1px 2px rgba(11,12,14,.04);
  --sh-2:0 14px 36px -14px rgba(11,12,14,.18);
  --ease:cubic-bezier(.2,.7,.2,1);
  --font:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --container:1240px;
  --pad:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--r-s);}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 var(--pad);
}
@media (min-width:1440px){:root{--container:1320px;}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 28px;
  border-radius:var(--r-s);
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  border:1px solid transparent;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--accent-d);transform:translateX(1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateX(1px) translateY(1px);}
.btn-outline{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn-outline:hover{background:var(--ink);color:#fff;}
.btn-ghost{border-color:rgba(255,255,255,.4);color:#fff;background:rgba(255,255,255,.04);}
.btn-ghost:hover{background:#fff;color:var(--ink);border-color:#fff;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;}

.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--accent);
  position:relative;
  padding-bottom:2px;
}
.text-link::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:100%;height:1px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .18s var(--ease);
}
.text-link:hover::after{transform:scaleX(1);}

/* ---------- 头部导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  height:64px;
  display:flex;
  align-items:center;
  background:transparent;
  border-bottom:1px solid rgba(255,255,255,.12);
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.site-header.is-scrolled{
  background:var(--paper);
  border-bottom-color:var(--line);
  color:var(--ink);
}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  width:100%;
}
.logo{display:inline-flex;align-items:center;gap:10px;color:#fff;transition:color .2s var(--ease);}
.site-header.is-scrolled .logo{color:var(--ink);}
.logo-mark{
  width:32px;height:32px;
  display:flex;align-items:center;justify-content:center;
  background:var(--ink);
  color:var(--accent);
  font-family:var(--mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.04em;
  border-radius:var(--r-s);
  border:1px solid rgba(226,84,42,.45);
}
.site-header.is-scrolled .logo-mark{background:var(--ink);}
.logo-text{font-size:16px;font-weight:800;letter-spacing:-.01em;}
.nav-chips{display:none;align-items:center;gap:6px;}
.chip{
  display:inline-flex;
  align-items:center;
  height:34px;
  padding:0 14px;
  border-radius:999px;
  font-size:14px;
  font-weight:500;
  color:rgba(255,255,255,.72);
  border:1px solid transparent;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.chip:hover{color:#fff;background:rgba(255,255,255,.1);}
.chip.is-active{background:#fff;color:var(--ink);font-weight:600;}
.site-header.is-scrolled .chip{color:var(--muted);}
.site-header.is-scrolled .chip:hover{color:var(--ink);background:rgba(11,12,14,.05);}
.site-header.is-scrolled .chip.is-active{background:var(--ink);color:#fff;}
.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-actions .btn-primary{display:none;}
.nav-toggle{
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  border-radius:var(--r-s);
  color:inherit;
}
.nav-toggle span{
  display:block;width:20px;height:2px;background:currentColor;position:relative;
}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:20px;height:2px;background:currentColor;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* 移动端抽屉 */
.drawer{
  position:fixed;
  inset:0;
  z-index:200;
  background:var(--ink);
  color:#fff;
  display:none;
  flex-direction:column;
  padding:24px;
}
.drawer.is-open{display:flex;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:40px;}
.drawer-close{
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,.25);border-radius:var(--r-s);font-size:20px;line-height:1;
}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 0;
  font-size:22px;
  font-weight:700;
  border-bottom:1px solid rgba(255,255,255,.12);
  transition:color .18s var(--ease);
}
.drawer-nav a:hover{color:var(--accent);}
.drawer-foot{margin-top:auto;padding-top:32px;}
.drawer-foot .btn{width:100%;}

@media (min-width:1024px){
  .nav-chips{display:flex;}
  .nav-actions .btn-primary{display:inline-flex;}
  .nav-toggle{display:none;}
}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  min-height:86vh;
  display:flex;
  align-items:center;
  background:var(--ink);
  color:#fff;
  overflow:hidden;
  padding:120px 0 72px;
  scroll-margin-top:88px;
}
.hero-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  opacity:.55;
}
.hero-overlay{
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(11,12,14,.86) 0%,rgba(11,12,14,.72) 45%,rgba(11,12,14,.94) 100%);
}
.hero-grid-lines{
  position:absolute;inset:0;
  background-image:linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:80px 100%;
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;width:100%;}
.hero-tag{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--accent);
  border:1px solid rgba(226,84,42,.4);
  background:rgba(226,84,42,.1);
  border-radius:999px;
  padding:6px 14px;
  margin-bottom:28px;
}
.hero h1{
  font-size:clamp(40px,6.4vw,84px);
  font-weight:900;
  line-height:1.02;
  letter-spacing:-.02em;
  max-width:16ch;
  margin-bottom:24px;
}
.hero-sub{
  font-size:clamp(16px,1.5vw,19px);
  line-height:1.75;
  color:rgba(255,255,255,.78);
  max-width:560px;
  margin-bottom:36px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:64px;}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
  border-top:1px solid rgba(255,255,255,.16);
  padding-top:28px;
  max-width:760px;
}
.stat-num{
  font-family:var(--mono);
  font-size:clamp(22px,2.4vw,32px);
  font-weight:700;
  color:#fff;
  line-height:1.2;
}
.stat-num em{font-style:normal;color:var(--accent);}
.stat-label{
  font-size:12px;
  letter-spacing:.08em;
  color:rgba(255,255,255,.6);
  margin-top:6px;
}

/* 锚点条 */
.anchor-bar{
  position:sticky;
  top:64px;
  z-index:100;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.anchor-inner{
  display:flex;
  gap:24px;
  overflow-x:auto;
  padding:0 var(--pad);
  scrollbar-width:none;
}
.anchor-inner::-webkit-scrollbar{display:none;}
.anchor-inner a{
  flex:0 0 auto;
  padding:14px 0;
  font-size:14px;
  font-weight:600;
  color:var(--muted);
  border-bottom:2px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.anchor-inner a:hover{color:var(--accent);border-bottom-color:var(--accent);}

/* ---------- 板块通用 ---------- */
.section{
  padding:72px 0;
  scroll-margin-top:88px;
}
.section + .section{border-top:1px solid var(--line);}
@media (min-width:1024px){
  .section{padding:120px 0;}
}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:48px;
}
.sec-num{
  display:inline-block;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--accent);
  border:1px solid var(--line);
  background:var(--surface);
  border-radius:var(--r-s);
  padding:4px 10px;
  margin-bottom:14px;
}
.section-title{
  font-size:clamp(28px,3.4vw,44px);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.02em;
}
.section-sub{
  font-size:16px;
  color:var(--muted);
  max-width:640px;
  margin-top:14px;
}
.sec-num-light{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.18);color:var(--accent);}

/* ---------- 卖点区 ---------- */
.split{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:36px;
}
@media (min-width:1024px){
  .split{grid-template-columns:300px minmax(0,1fr);gap:72px;}
  .split-aside{position:sticky;top:128px;align-self:start;}
}
.num-list{border-top:1px solid var(--line);}
.num-item{
  display:grid;
  grid-template-columns:56px minmax(0,1fr);
  gap:20px;
  padding:32px 0;
  border-bottom:1px solid var(--line);
  transition:background-color .18s var(--ease);
}
.num-item:hover{background:var(--accent-soft);}
.num-index{
  font-family:var(--mono);
  font-size:14px;
  font-weight:700;
  color:var(--accent);
  padding-top:4px;
}
.num-title{
  font-size:20px;
  font-weight:700;
  line-height:1.45;
  margin-bottom:10px;
}
.num-text{
  font-size:16px;
  line-height:1.85;
  color:var(--muted);
  max-width:66ch;
  margin-bottom:14px;
}

/* ---------- 步骤 ---------- */
.steps{display:flex;flex-direction:column;}
.step{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:20px;
  padding:32px 0;
  border-bottom:1px solid var(--line);
}
.step:first-child{padding-top:0;}
.step:last-child{border-bottom:0;}
@media (min-width:768px){
  .step{grid-template-columns:minmax(0,1fr) 300px;align-items:center;gap:56px;padding:56px 0;}
}
.step-index{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:36px;height:36px;
  border:1px solid var(--ink);
  border-radius:var(--r-s);
  font-family:var(--mono);
  font-size:14px;
  font-weight:700;
  margin-bottom:16px;
}
.step h3{font-size:clamp(20px,2vw,26px);font-weight:700;line-height:1.3;margin-bottom:12px;}
.step p{color:var(--muted);max-width:60ch;}
.step-figure{
  border-radius:var(--r-s);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--surface);
}
.step-figure img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  transition:transform .18s var(--ease);
}
.step:hover .step-figure img{transform:scale(1.03);}

/* ---------- 证据区 ---------- */
.proof-band{
  background:var(--ink);
  color:#fff;
  padding:56px 0;
}
.proof-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:32px 20px;
}
@media (min-width:768px){.proof-grid{grid-template-columns:repeat(4,minmax(0,1fr));}}
.proof-item{border-left:2px solid var(--accent);padding-left:18px;}
.proof-num{
  font-family:var(--mono);
  font-size:clamp(26px,3vw,34px);
  font-weight:700;
  line-height:1.1;
}
.proof-cap{font-size:13px;color:rgba(255,255,255,.62);margin-top:8px;letter-spacing:.04em;}
.evidence-track{
  display:flex;
  gap:20px;
  overflow-x:auto;
  padding-bottom:12px;
  scroll-snap-type:x mandatory;
}
.evidence-card{
  flex:0 0 320px;
  scroll-snap-align:start;
  background:var(--surface);
  border:1px solid var(--line);
  border-left:3px solid var(--secondary);
  border-radius:var(--r-m);
  padding:26px;
  transition:box-shadow .18s var(--ease),transform .18s var(--ease);
}
.evidence-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.evidence-card h4{font-size:18px;font-weight:600;margin-bottom:10px;}
.evidence-card p{font-size:15px;color:var(--muted);line-height:1.8;}
.evidence-meta{
  margin-top:18px;
  font-family:var(--mono);
  font-size:12px;
  color:var(--muted);
  letter-spacing:.06em;
  display:flex;
  justify-content:space-between;
  gap:10px;
  border-top:1px solid var(--line);
  padding-top:14px;
}
.rank-list{
  border-top:1px solid var(--line);
  margin-top:40px;
}
.rank-item{
  display:flex;
  align-items:baseline;
  gap:16px;
  padding:16px 4px;
  border-bottom:1px solid var(--line);
  transition:background-color .18s var(--ease),padding-left .18s var(--ease);
}
.rank-item:hover{background:var(--accent-soft);padding-left:12px;}
.rank-no{
  font-family:var(--mono);
  font-size:13px;
  font-weight:700;
  color:var(--accent);
  min-width:28px;
}
.rank-title{flex:1;font-size:16px;font-weight:500;}
.rank-time{font-family:var(--mono);font-size:12px;color:var(--muted);}
.brand-row{
  display:flex;
  flex-wrap:wrap;
  gap:12px 28px;
  align-items:center;
  margin-top:48px;
  padding-top:28px;
  border-top:1px solid var(--line);
}
.brand-item{
  font-size:13px;
  letter-spacing:.08em;
  color:var(--muted);
  opacity:.62;
  transition:opacity .18s var(--ease),color .18s var(--ease);
}
.brand-item:hover{opacity:1;color:var(--ink);}

/* ---------- 最新信息 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.08em;
  background:rgba(47,111,107,.1);
  color:var(--secondary);
  font-weight:600;
}
.badge-hot{
  background:var(--accent-soft);
  color:var(--accent-d);
}
.news-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:28px;
}
@media (min-width:1024px){
  .news-grid{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:48px;}
}
.news-feature{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.news-feature:hover{border-color:rgba(226,84,42,.35);box-shadow:var(--sh-2);transform:translateY(-2px);}
.news-feature-cover{aspect-ratio:16/9;overflow:hidden;background:var(--paper);}
.news-feature-cover img{width:100%;height:100%;object-fit:cover;transition:transform .18s var(--ease);}
.news-feature:hover .news-feature-cover img{transform:scale(1.03);}
.news-feature-body{padding:26px;display:flex;flex-direction:column;gap:12px;}
.news-title{
  font-size:20px;
  font-weight:700;
  line-height:1.45;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-feature .news-title{font-size:clamp(20px,2vw,26px);}
.news-summary{
  font-size:15px;
  color:var(--muted);
  line-height:1.8;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--line);
  font-family:var(--mono);
  font-size:12px;
  color:var(--muted);
  letter-spacing:.05em;
}
.news-list{display:flex;flex-direction:column;border-top:1px solid var(--line);}
.news-item{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:20px 4px;
  border-bottom:1px solid var(--line);
  transition:background-color .18s var(--ease),padding-left .18s var(--ease);
}
.news-item:hover{background:var(--accent-soft);padding-left:12px;}
.news-item .news-title{font-size:17px;font-weight:600;-webkit-line-clamp:2;}
.news-item-foot{
  display:flex;
  align-items:center;
  gap:12px;
  font-family:var(--mono);
  font-size:12px;
  color:var(--muted);
}
.empty-state{
  border:1px dashed var(--line);
  border-radius:var(--r-m);
  background:var(--surface);
  padding:64px 24px;
  text-align:center;
  color:var(--muted);
}
.empty-state svg{margin:0 auto 16px;display:block;color:var(--muted);}
.empty-state p{font-size:16px;margin-bottom:18px;}

/* ---------- 方案价目 ---------- */
.price-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:24px;
}
@media (min-width:768px){.price-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.price-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}
.price-card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  padding:32px 28px;
  display:flex;
  flex-direction:column;
  transition:box-shadow .18s var(--ease),transform .18s var(--ease),border-color .18s var(--ease);
}
.price-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.price-card.is-featured{border:2px solid var(--accent);}
.ribbon{
  position:absolute;
  top:-13px;left:28px;
  background:var(--accent);
  color:#fff;
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  padding:4px 12px;
  border-radius:999px;
}
.price-name{font-size:18px;font-weight:700;margin-bottom:8px;}
.price-desc{font-size:14px;color:var(--muted);line-height:1.8;min-height:44px;}
.price-amount{
  font-family:var(--mono);
  font-size:clamp(30px,4vw,44px);
  font-weight:700;
  line-height:1.1;
  margin:22px 0 6px;
}
.price-amount small{font-size:14px;font-weight:500;color:var(--muted);margin-left:6px;font-family:var(--font);}
.price-cycle{font-size:13px;color:var(--muted);font-family:var(--mono);letter-spacing:.06em;}
.price-divider{height:1px;background:var(--line);margin:22px 0;}
.price-list{display:flex;flex-direction:column;gap:12px;margin-bottom:28px;}
.price-list li{
  display:flex;
  gap:10px;
  font-size:15px;
  line-height:1.7;
  color:var(--muted);
}
.price-list li::before{
  content:"";
  flex:0 0 auto;
  width:8px;height:8px;
  margin-top:9px;
  background:var(--accent);
  border-radius:1px;
}
.price-card .btn{margin-top:auto;}
.price-note{
  margin-top:28px;
  font-size:13px;
  color:var(--muted);
  line-height:1.8;
  border-left:2px solid var(--line);
  padding-left:14px;
}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px;}
@media (min-width:1024px){.faq-layout{grid-template-columns:300px minmax(0,1fr);gap:72px;}}
.faq-aside p{color:var(--muted);font-size:15px;margin:16px 0 22px;max-width:30ch;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:20px;
  text-align:left;
  padding:22px 4px;
  font-size:18px;
  font-weight:600;
  line-height:1.55;
  transition:color .18s var(--ease);
}
.faq-q:hover{color:var(--accent);}
.faq-icon{
  flex:0 0 auto;
  width:22px;height:22px;
  position:relative;
  margin-top:6px;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--muted);
  transition:transform .18s var(--ease),background-color .18s var(--ease);
}
.faq-icon::before{top:10px;left:0;width:22px;height:1.5px;}
.faq-icon::after{left:10px;top:0;width:1.5px;height:22px;}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);}
.faq-item.is-open .faq-q{color:var(--accent);}
.faq-item.is-open .faq-icon::before{background:var(--accent);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .25s var(--ease);
}
.faq-a-inner{
  padding:0 4px 24px;
  max-width:720px;
  font-size:16px;
  line-height:1.85;
  color:var(--muted);
}
.faq-item.is-open .faq-a{max-height:360px;}

/* ---------- 结尾 CTA ---------- */
.cta-band{
  position:relative;
  background:var(--ink);
  color:#fff;
  padding:88px 0;
  overflow:hidden;
  scroll-margin-top:88px;
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(180deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:80px 80px;
  opacity:.6;
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1fr);gap:32px;align-items:center;}
@media (min-width:1024px){.cta-inner{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:64px;}}
.cta-band h2{
  font-size:clamp(30px,4.2vw,56px);
  font-weight:900;
  line-height:1.08;
  letter-spacing:-.02em;
  margin-bottom:18px;
}
.cta-band p{color:rgba(255,255,255,.72);max-width:52ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:8px;}
.cta-contact{
  font-family:var(--mono);
  font-size:13px;
  color:rgba(255,255,255,.62);
  margin-top:20px;
  letter-spacing:.05em;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);
  color:rgba(255,255,255,.72);
  padding:64px 0 28px;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:36px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:48px;}}
.footer-brand .logo{color:#fff;margin-bottom:16px;}
.footer-brand p{line-height:1.85;font-size:14px;max-width:34ch;}
.footer-col h4{
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  color:#fff;
  margin-bottom:18px;
}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col a{
  font-size:14px;
  color:rgba(255,255,255,.68);
  transition:color .18s var(--ease);
}
.footer-col a:hover{color:var(--accent);}
.footer-col p{font-size:14px;line-height:1.85;margin-bottom:10px;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px 24px;
  align-items:center;
  justify-content:space-between;
  padding-top:24px;
  font-size:13px;
  color:rgba(255,255,255,.5);
  font-family:var(--mono);
  letter-spacing:.03em;
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;
  right:32px;
  bottom:32px;
  z-index:150;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
}
.float-cta.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta .btn{border-radius:999px;box-shadow:var(--sh-2);}
.float-mobile{display:none;}

@media (max-width:600px){
  .float-cta{
    right:0;left:0;bottom:0;
    padding:10px 14px calc(10px + env(safe-area-inset-bottom,0px));
    background:rgba(11,12,14,.96);
    border-top:1px solid rgba(255,255,255,.12);
    transform:translateY(100%);
  }
  .float-cta.is-show{transform:translateY(0);}
  .float-cta .float-desktop{display:none;}
  .float-mobile{display:flex;gap:10px;align-items:center;}
  .float-mobile .btn-main{flex:1 1 70%;}
  .float-mobile .icon-btn{
    flex:0 0 auto;
    width:48px;height:48px;
    display:flex;align-items:center;justify-content:center;
    border:1px solid rgba(255,255,255,.28);
    border-radius:var(--r-s);
    color:#fff;
    transition:background-color .18s var(--ease),color .18s var(--ease);
  }
  .float-mobile .icon-btn:hover{background:#fff;color:var(--ink);}
  body{padding-bottom:76px;}
}

@media (max-width:768px){
  .hero{min-height:78vh;padding:104px 0 56px;}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .evidence-card{flex:0 0 82%;}
}
@media (max-width:520px){
  :root{--pad:20px;}
  .logo-text{font-size:15px;}
  .hero h1{font-size:clamp(30px,9vw,40px);}
  .hero-cta .btn{width:100%;}
  .num-item{grid-template-columns:40px minmax(0,1fr);gap:14px;}
  .news-feature-cover{aspect-ratio:4/3;}
}

/* roulang page: article */
:root{
  --ink:#0B0C0E;
  --deep:#17191C;
  --accent:#E2542A;
  --accent-d:#B93F1C;
  --accent-soft:#FDEDE6;
  --secondary:#2F6F6B;
  --paper:#F6F5F2;
  --surface:#FFFFFF;
  --line:#E3E1DC;
  --muted:#6E6E73;
  --text:#22242A;
  --ok:#2F7A4F;
  --warn:#B7791F;
  --err:#C0392B;
  --r-s:2px;
  --r-m:4px;
  --r-l:6px;
  --sh-1:0 1px 2px rgba(11,12,14,.04);
  --sh-2:0 14px 36px -14px rgba(11,12,14,.18);
  --ease:cubic-bezier(.2,.7,.2,1);
  --sec:clamp(56px,8vw,120px);
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;color:var(--ink);}
p{margin:0;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:var(--r-s);}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
@media (min-width:1440px){.container{max-width:1320px;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,245,242,.92);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease),background-color .22s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-1);background:rgba(246,245,242,.98);}
.nav-wrap{display:flex;align-items:center;gap:24px;height:64px;}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);letter-spacing:-.01em;flex:0 0 auto;}
.logo-mark{
  width:32px;height:32px;border-radius:var(--r-m);
  background:var(--ink);color:#fff;
  display:grid;place-items:center;
  font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.02em;
}
.logo-text{font-size:16px;white-space:nowrap;}
.nav-chips{display:flex;align-items:center;gap:6px;flex:1 1 auto;min-width:0;overflow-x:auto;scrollbar-width:none;}
.nav-chips::-webkit-scrollbar{display:none;}
.chip{
  flex:0 0 auto;
  padding:8px 14px;border-radius:999px;
  font-size:14px;font-weight:600;color:var(--muted);
  border:1px solid transparent;white-space:nowrap;
}
.chip:hover{color:var(--ink);background:#EFEDE8;}
.chip.is-active{background:var(--ink);color:#fff;border-color:var(--ink);}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-m);
  border:1px solid var(--line);background:var(--surface);
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";position:absolute;left:12px;width:20px;height:1.5px;background:var(--ink);border-radius:2px;
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.nav-toggle span{top:21px;}
.nav-toggle span::before{left:0;top:-6px;}
.nav-toggle span::after{left:0;top:6px;}
body.nav-open .nav-toggle span{transform:rotate(45deg);}
body.nav-open .nav-toggle span::before{transform:rotate(-90deg) translateX(-6px);opacity:0;}
body.nav-open .nav-toggle span::after{transform:rotate(-90deg) translateX(6px);opacity:0;}

.mobile-drawer{
  position:fixed;inset:0;z-index:55;
  background:var(--ink);color:#fff;
  padding:88px 24px 32px;
  display:flex;flex-direction:column;gap:8px;
  transform:translateY(-100%);opacity:0;pointer-events:none;
  transition:transform .3s var(--ease),opacity .3s var(--ease);
}
body.nav-open .mobile-drawer{transform:translateY(0);opacity:1;pointer-events:auto;}
.mobile-drawer a{
  font-size:22px;font-weight:700;color:#fff;
  padding:16px 0;border-bottom:1px solid rgba(255,255,255,.12);
}
.mobile-drawer a:hover{color:var(--accent);}
.mobile-drawer .btn{margin-top:24px;align-self:flex-start;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-s);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-d);transform:translateX(1px);}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn-ghost:hover{background:var(--ink);color:#fff;}
.btn-light{border-color:rgba(255,255,255,.4);color:#fff;background:transparent;}
.btn-light:hover{background:#fff;color:var(--ink);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn:disabled,.btn.is-disabled{opacity:.4;pointer-events:none;}
.link-arrow{color:var(--accent);font-weight:700;font-size:14px;display:inline-flex;align-items:center;gap:6px;}
.link-arrow::after{content:"→";transition:transform .18s var(--ease);}
.link-arrow:hover::after{transform:translateX(4px);}

/* ============ 阅读进度 ============ */
.progress-bar{position:fixed;top:0;left:0;height:2px;width:0;background:var(--accent);z-index:70;transition:width .1s linear;}

/* ============ 面包屑 ============ */
.article-top{padding:32px 0 0;}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:12px;color:var(--muted);letter-spacing:.02em;}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb .sep{color:var(--line);}
.breadcrumb .current{max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink);}

/* ============ 文章头 ============ */
.article-head{padding:28px 0 36px;border-bottom:1px solid var(--line);}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:700;letter-spacing:.08em;
  background:rgba(47,111,107,.1);color:var(--secondary);
}
.badge-accent{background:var(--accent-soft);color:var(--accent-d);}
.article-head h1{
  margin:18px 0 0;
  font-size:clamp(30px,4vw,48px);
  font-weight:800;line-height:1.2;letter-spacing:-.02em;
  max-width:900px;
}
.article-meta{
  margin-top:22px;display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  font-size:13px;color:var(--muted);
}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--line);}
.article-meta .mono{font-family:var(--mono);font-size:12px;letter-spacing:.02em;}

/* ============ 正文 ============ */
.article-main{padding:48px 0 8px;}
.article-body{
  max-width:760px;margin:0 auto;
  font-size:17px;line-height:1.9;color:var(--text);
}
.article-body p{margin:0 0 22px;}
.article-body > p:first-of-type{font-size:18px;color:#2C2F36;}
.article-body h2{
  position:relative;
  margin:56px 0 20px;padding:24px 0 0 14px;
  font-size:clamp(22px,2.4vw,30px);font-weight:800;line-height:1.3;
  border-top:1px solid var(--line);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:28px;width:4px;height:22px;
  background:var(--accent);border-radius:2px;
}
.article-body h3{margin:36px 0 14px;font-size:clamp(18px,1.8vw,22px);font-weight:700;line-height:1.45;}
.article-body h4{margin:26px 0 10px;font-size:18px;font-weight:600;line-height:1.5;}
.article-body a{color:var(--accent-d);border-bottom:1px solid rgba(226,84,42,.35);}
.article-body a:hover{color:var(--accent);border-bottom-color:var(--accent);}
.article-body ul,.article-body ol{margin:0 0 24px;padding-left:2px;}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:10px;}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:13px;width:6px;height:6px;
  background:var(--secondary);border-radius:1px;
}
.article-body ol{counter-reset:li;padding-left:0;}
.article-body ol li{position:relative;padding-left:34px;margin-bottom:10px;counter-increment:li;}
.article-body ol li::before{
  content:counter(li,decimal-leading-zero);
  position:absolute;left:0;top:2px;
  font-family:var(--mono);font-size:13px;color:var(--accent);font-weight:700;
}
.article-body blockquote{
  margin:28px 0;padding:20px 24px;
  background:var(--surface);border-left:3px solid var(--accent);
  border-radius:0 var(--r-m) var(--r-m) 0;
  color:#3A3D45;font-size:16.5px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  width:100%;height:auto;border-radius:var(--r-m);
  margin:28px 0 10px;box-shadow:var(--sh-1);
}
.article-body figure{margin:28px 0;}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px;}
.article-body table{
  width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;
  border:1px solid var(--line);background:var(--surface);
  display:block;overflow-x:auto;white-space:nowrap;
}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);text-align:left;}
.article-body th{background:var(--paper);font-weight:700;color:var(--ink);}
.article-body pre{
  background:var(--deep);color:#EDEDEA;border-radius:var(--r-m);
  padding:18px 20px;overflow-x:auto;font-family:var(--mono);font-size:14px;line-height:1.7;
  margin:24px 0;
}
.article-body code{
  font-family:var(--mono);font-size:14px;background:#EFEDE8;
  padding:2px 6px;border-radius:var(--r-s);color:#8A3A22;
}
.article-body pre code{background:none;color:inherit;padding:0;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0;}

/* 空态 */
.empty-state{
  max-width:760px;margin:0 auto;padding:64px 24px;text-align:center;
  background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-l);
}
.empty-state .icon{width:44px;height:44px;margin:0 auto 18px;color:var(--muted);}
.empty-state h2{font-size:20px;margin-bottom:10px;}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:24px;}

/* ============ 文末 ============ */
.article-foot{padding:16px 0 0;}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:32px 0 0;}
.tag-row .tag{
  padding:5px 12px;border-radius:999px;font-size:12.5px;
  background:var(--surface);border:1px solid var(--line);color:var(--muted);
}
.tag-row .tag:hover{border-color:var(--accent);color:var(--accent);}
.post-nav{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  margin:40px 0 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.post-nav a{padding:26px 24px;display:flex;flex-direction:column;gap:6px;transition:background-color .18s var(--ease);}
.post-nav a:hover{background:var(--surface);}
.post-nav a:hover .pn-title{color:var(--accent);}
.post-nav a + a{border-left:1px solid var(--line);}
.post-nav .pn-label{font-size:12px;letter-spacing:.12em;color:var(--muted);font-family:var(--mono);}
.post-nav .pn-title{font-size:17px;font-weight:700;color:var(--ink);transition:color .18s var(--ease);}
.back-row{margin:28px 0 0;}

/* ============ 相关推荐 ============ */
.section{padding:var(--sec) 0;border-top:1px solid var(--line);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-head h2{font-size:clamp(24px,2.8vw,36px);line-height:1.15;letter-spacing:-.02em;}
.section-head .eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--accent);
  display:block;margin-bottom:12px;
}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(226,84,42,.3);}
.card-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--paper);}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .28s var(--ease);}
.card:hover .card-thumb img{transform:scale(1.03);}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.card-body h3{font-size:18px;font-weight:700;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-body p{font-size:14.5px;line-height:1.75;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--muted);}

/* ============ CTA 带 ============ */
.cta-band{background:var(--ink);color:#fff;padding:clamp(64px,9vw,110px) 0;position:relative;overflow:hidden;}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:64px 64px;opacity:.6;
}
.cta-band .container{position:relative;z-index:2;}
.cta-band h2{
  color:#fff;font-size:clamp(30px,4.4vw,56px);font-weight:900;line-height:1.08;letter-spacing:-.02em;
  max-width:820px;
}
.cta-band p{color:rgba(255,255,255,.72);margin-top:20px;max-width:640px;font-size:16px;line-height:1.85;}
.cta-actions{margin-top:38px;display:flex;flex-wrap:wrap;gap:14px;}
.cta-note{margin-top:26px;font-size:13px;color:rgba(255,255,255,.55);letter-spacing:.02em;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand .logo{color:#fff;margin-bottom:18px;}
.footer-brand .logo-mark{background:#fff;color:var(--ink);}
.footer-brand p{font-size:14px;line-height:1.85;max-width:340px;}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:18px;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col li,.footer-col p{font-size:14px;line-height:1.75;margin-bottom:10px;}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:24px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:12.5px;color:rgba(255,255,255,.5);
}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:32px;bottom:32px;z-index:58;
  display:flex;align-items:center;gap:10px;
  background:var(--surface);border:1px solid var(--line);border-radius:999px;
  padding:8px;box-shadow:var(--sh-2);
  opacity:0;transform:translateY(16px);pointer-events:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta .btn{border-radius:999px;height:44px;}
.float-icon{
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--ink);background:var(--surface);
}
.float-icon:hover{border-color:var(--accent);color:var(--accent);}
.float-icon svg{width:20px;height:20px;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .card-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:1024px){
  .nav-chips{display:none;}
  .nav-toggle{display:block;}
  .nav-actions .btn{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .article-head h1{font-size:28px;}
  .article-body{font-size:16px;line-height:1.88;}
  .post-nav{grid-template-columns:1fr;}
  .post-nav a + a{border-left:0;border-top:1px solid var(--line);}
  .card-grid{grid-template-columns:1fr;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;border-left:0;border-right:0;border-bottom:0;
    padding:10px 16px;justify-content:space-between;
  }
  .float-cta .btn-primary{flex:1;margin-right:8px;}
  body{padding-bottom:76px;}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr;}
  .article-meta{gap:8px 16px;}
  .cta-actions .btn{width:100%;}
}

/* roulang page: category1 */
:root{
  --ink:#0B0C0E;
  --deep:#17191C;
  --accent:#E2542A;
  --accent-d:#B93F1C;
  --accent-soft:#FDEDE6;
  --secondary:#2F6F6B;
  --paper:#F6F5F2;
  --surface:#FFFFFF;
  --line:#E3E1DC;
  --muted:#6E6E73;
  --ok:#2F7A4F;
  --warn:#B7791F;
  --err:#C0392B;
  --info:#2F6F6B;
  --r-s:2px;
  --r-m:4px;
  --r-l:6px;
  --sh-1:0 1px 2px rgba(11,12,14,.04);
  --sh-2:0 14px 36px -14px rgba(11,12,14,.18);
  --ease:cubic-bezier(.2,.7,.2,1);
  --t:180ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"Noto Sans SC","Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16.5px;
  line-height:1.88;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.is-locked{overflow:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color var(--t) var(--ease),border-color var(--t) var(--ease),background-color var(--t) var(--ease)}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:var(--r-s)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{font-weight:800;letter-spacing:-.02em;line-height:1.18;margin:0}
p{margin:0 0 16px}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.mono{font-family:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;font-variant-numeric:tabular-nums}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-s);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background-color var(--t) var(--ease),color var(--t) var(--ease),border-color var(--t) var(--ease),transform var(--t) var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-d);transform:translateX(1px)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn-light{border-color:rgba(255,255,255,.5);color:#fff;background:transparent}
.btn-light:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn-lg{height:54px;padding:0 34px;font-size:16px}
.btn[disabled]{opacity:.4;pointer-events:none}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.08em;
  border:1px solid transparent;
}
.badge-secondary{background:rgba(47,111,107,.1);color:var(--secondary);border-color:rgba(47,111,107,.22)}
.badge-accent{background:var(--accent-soft);color:var(--accent-d);border-color:rgba(226,84,42,.22)}
.badge-ink{background:var(--ink);color:#fff}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  border-bottom:1px solid transparent;
  transition:background-color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.site-header.is-scrolled{background:var(--paper);border-bottom-color:var(--line)}
.nav-wrap{display:flex;align-items:center;gap:24px;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em;color:#fff}
.logo-mark{
  width:32px;height:32px;flex:0 0 32px;display:grid;place-items:center;
  border:1px solid rgba(255,255,255,.5);border-radius:var(--r-m);
  font-size:12.5px;font-weight:800;letter-spacing:.02em;color:#fff;
  transition:background-color var(--t) var(--ease),color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.site-header.is-scrolled .logo{color:var(--ink)}
.site-header.is-scrolled .logo-mark{background:var(--ink);border-color:var(--ink);color:#fff}
.nav-chips{display:flex;align-items:center;justify-content:center;gap:4px;flex:1}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
  font-size:14.5px;font-weight:600;color:rgba(255,255,255,.74);
  transition:color var(--t) var(--ease),background-color var(--t) var(--ease);
}
.chip:hover{color:#fff}
.chip.is-active{background:rgba(255,255,255,.16);color:#fff}
.site-header.is-scrolled .chip{color:var(--muted)}
.site-header.is-scrolled .chip:hover{color:var(--ink)}
.site-header.is-scrolled .chip.is-active{background:var(--ink);color:#fff}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border-radius:var(--r-m);border:1px solid rgba(255,255,255,.4);
}
.nav-toggle span{position:relative;display:block;width:18px;height:1.5px;background:#fff;transition:background-color var(--t) var(--ease)}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:1.5px;background:#fff;transition:transform var(--t) var(--ease)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.site-header.is-scrolled .nav-toggle{border-color:var(--line)}
.site-header.is-scrolled .nav-toggle span,
.site-header.is-scrolled .nav-toggle span::before,
.site-header.is-scrolled .nav-toggle span::after{background:var(--ink)}

/* ---------- 移动抽屉 ---------- */
.mobile-drawer{
  position:fixed;inset:0;z-index:120;background:var(--ink);color:#fff;
  padding:20px 24px 32px;display:flex;flex-direction:column;
  transform:translateY(-102%);transition:transform 280ms var(--ease);
  visibility:hidden;
}
.mobile-drawer.is-open{transform:translateY(0);visibility:visible}
.drawer-top{display:flex;align-items:center;justify-content:space-between;height:44px;margin-bottom:28px}
.drawer-close{width:44px;height:44px;display:grid;place-items:center;border:1px solid rgba(255,255,255,.35);border-radius:var(--r-m);margin-left:auto;color:#fff}
.drawer-close:hover{border-color:var(--accent);color:var(--accent)}
.drawer-menu{display:flex;flex-direction:column;gap:4px}
.drawer-menu a{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 0;font-size:22px;font-weight:800;
  border-bottom:1px solid rgba(255,255,255,.12);color:#fff;
}
.drawer-menu a span{font-size:12px;font-weight:500;color:rgba(255,255,255,.45);letter-spacing:.12em}
.drawer-menu a:hover{color:var(--accent)}
.drawer-foot{margin-top:auto;padding-top:28px}
.drawer-foot .btn{width:100%}
.drawer-note{font-size:13.5px;color:rgba(255,255,255,.55);margin:14px 0 0}

/* ---------- 页头 banner ---------- */
.page-hero{position:relative;background:var(--ink);color:#fff;overflow:hidden;padding:136px 0 64px}
.page-hero .hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.42;filter:grayscale(28%);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:72px 72px;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:rgba(255,255,255,.6);margin-bottom:26px}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:rgba(255,255,255,.3)}
.page-hero h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;margin:18px 0 14px;letter-spacing:-.02em}
.hero-lead{max-width:720px;font-size:17px;line-height:1.9;color:rgba(255,255,255,.78);margin:0 0 26px}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px}
.hero-chips li{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:999px;
  border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06);
  font-size:13px;color:rgba(255,255,255,.85);
}
.hero-chips b{font-family:"JetBrains Mono",monospace;font-size:14px;color:#fff;font-weight:700}

/* ---------- 锚点两栏布局 ---------- */
.anchor-section{padding:96px 0 24px}
.anchor-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:64px;align-items:start}
.anchor-side{position:sticky;top:96px}
.anchor-side h1{font-size:clamp(34px,4.2vw,56px);font-weight:900;line-height:1.06;letter-spacing:-.025em}
.side-desc{font-size:16px;color:var(--muted);line-height:1.9;margin:18px 0 28px;max-width:420px}
.side-nav{display:flex;flex-direction:column;gap:2px;border-top:1px solid var(--line);padding-top:18px}
.side-nav a{
  display:flex;align-items:center;gap:12px;
  padding:10px 0;font-size:14.5px;color:var(--muted);
  border-bottom:1px solid var(--line);
}
.side-nav a i{font-style:normal;font-family:"JetBrains Mono",monospace;font-size:12px;color:var(--muted);letter-spacing:.06em}
.side-nav a:hover{color:var(--accent)}
.side-nav a:hover i{color:var(--accent)}
.side-meta{margin-top:26px;padding-top:20px;border-top:1px solid var(--line);font-size:13.5px;color:var(--muted);line-height:1.8}

/* ---------- 流式分节 ---------- */
.flow-item{padding:56px 0;border-bottom:1px solid var(--line);scroll-margin-top:96px}
.flow-item:first-child{padding-top:0}
.flow-item:last-child{border-bottom:0}
.flow-head{display:flex;align-items:baseline;gap:14px;margin-bottom:18px}
.flow-num{
  font-family:"JetBrains Mono",monospace;font-size:12px;font-weight:700;
  color:var(--accent);letter-spacing:.1em;
  border:1px solid rgba(226,84,42,.3);border-radius:var(--r-s);padding:2px 7px;
}
.flow-item h3{font-size:clamp(20px,2vw,26px);font-weight:700;line-height:1.3}
.flow-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.86fr);gap:40px;align-items:center}
.flow-item.rev .flow-grid .flow-media{order:-1}
.flow-text p{font-size:16.5px;color:#2a2b2f;line-height:1.9}
.flow-text p:last-child{margin-bottom:0}
.flow-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.flow-list li{position:relative;padding-left:22px;font-size:15.5px;color:var(--muted);line-height:1.8}
.flow-list li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;
  border:1.5px solid var(--secondary);border-radius:1px;
}
.flow-media{position:relative;border-radius:var(--r-m);overflow:hidden;background:#fff;border:1px solid var(--line)}
.flow-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform 320ms var(--ease)}
.flow-media:hover img{transform:scale(1.03)}
.flow-media figcaption{font-size:12.5px;color:var(--muted);padding:10px 14px;border-top:1px solid var(--line);background:var(--surface)}

/* ---------- 数据带 ---------- */
.metric-band{
  margin:56px 0;padding:34px 32px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-m);
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:26px;
}
.metric-band .metric{border-left:1px solid var(--line);padding-left:20px}
.metric-band .metric:first-child{border-left:0;padding-left:0}
.metric b{display:block;font-family:"JetBrains Mono",monospace;font-size:30px;font-weight:700;letter-spacing:-.02em;line-height:1.1}
.metric span{display:block;margin-top:8px;font-size:12.5px;color:var(--muted);letter-spacing:.06em}

/* ---------- FAQ ---------- */
.faq-section{padding:96px 0;border-top:1px solid var(--line)}
.faq-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:64px;align-items:start}
.faq-side h2{font-size:clamp(28px,3.4vw,44px);font-weight:800}
.faq-side p{color:var(--muted);font-size:15.5px;margin-top:16px}
.faq-side .side-contact{margin-top:22px;padding:18px 20px;background:var(--accent-soft);border-left:3px solid var(--accent);border-radius:var(--r-s);font-size:14.5px;color:#5c3a2c}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:22px;
  padding:22px 0;font-size:18px;font-weight:600;line-height:1.55;transition:color var(--t) var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--accent)}
.faq-icon{position:relative;flex:0 0 16px;width:16px;height:16px;margin-top:6px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ink);transition:transform var(--t) var(--ease)}
.faq-icon::before{left:0;top:7px;width:16px;height:1.5px}
.faq-icon::after{left:7px;top:0;width:1.5px;height:16px}
.faq-item[open] .faq-icon::after{transform:scaleY(0)}
.faq-answer{max-width:720px;padding:0 0 24px;font-size:16px;line-height:1.9;color:var(--muted)}

/* ---------- 相关入口 ---------- */
.related-section{padding:0 0 96px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px}
.section-head h2{font-size:clamp(24px,2.6vw,32px);font-weight:800}
.link-more{font-size:14px;font-weight:600;color:var(--accent);border-bottom:1px solid transparent}
.link-more:hover{border-bottom-color:var(--accent)}
.entry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.entry-card{
  display:flex;flex-direction:column;gap:12px;
  padding:28px 26px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-m);
  transition:border-color var(--t) var(--ease),transform var(--t) var(--ease),box-shadow var(--t) var(--ease);
}
.entry-card:hover{border-color:rgba(226,84,42,.4);transform:translateY(-2px);box-shadow:var(--sh-2)}
.entry-card .entry-idx{font-family:"JetBrains Mono",monospace;font-size:12px;color:var(--secondary);letter-spacing:.1em}
.entry-card h3{font-size:19px;font-weight:700}
.entry-card p{font-size:14.5px;color:var(--muted);line-height:1.85;margin:0}
.entry-card .entry-link{margin-top:6px;font-size:14px;font-weight:600;color:var(--accent)}

/* ---------- CTA 带 ---------- */
.cta-band{position:relative;background:var(--ink);color:#fff;padding:88px 0;overflow:hidden;scroll-margin-top:80px}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:64px 64px;pointer-events:none;
}
.cta-band .container{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:48px;align-items:center}
.cta-band h2{font-size:clamp(28px,3.6vw,46px);font-weight:900;line-height:1.08;letter-spacing:-.025em;margin-bottom:16px}
.cta-band p{color:rgba(255,255,255,.72);font-size:16px;margin:0}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.cta-info{display:flex;flex-direction:column;gap:14px;font-size:14.5px;color:rgba(255,255,255,.72)}
.cta-info .row{display:flex;gap:12px;padding-bottom:14px;border-bottom:1px solid rgba(255,255,255,.14)}
.cta-info .row b{color:#fff;font-weight:600;min-width:76px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand .logo-mark{background:#fff;border-color:#fff;color:var(--ink)}
.footer-brand p{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.6);max-width:320px;margin:0}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14.5px;color:rgba(255,255,255,.68)}
.footer-col a:hover{color:var(--accent)}
.footer-col p{font-size:14px;color:rgba(255,255,255,.6);margin:0 0 8px;line-height:1.8}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:24px;font-size:13px;color:rgba(255,255,255,.45)}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:32px;bottom:32px;z-index:60;display:flex;align-items:center;gap:10px;
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity 220ms var(--ease),transform 220ms var(--ease);
}
.float-cta.is-visible{opacity:1;transform:none;pointer-events:auto}
.float-icon{
  display:none;width:48px;height:48px;align-items:center;justify-content:center;
  background:var(--surface);border:1px solid var(--line);border-radius:999px;color:var(--ink);
  box-shadow:var(--sh-1);
}
.float-icon:hover{border-color:var(--accent);color:var(--accent)}
.float-cta .btn{border-radius:999px;box-shadow:var(--sh-2)}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .anchor-layout,.faq-layout{gap:44px}
  .anchor-side{position:static}
  .side-desc{max-width:none}
  .side-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 24px}
}
@media (max-width:1024px){
  .nav-chips{display:none}
  .nav-toggle{display:inline-flex}
  .nav-wrap{gap:16px}
  .nav-actions{margin-left:auto}
  .anchor-layout,.faq-layout{grid-template-columns:minmax(0,1fr);gap:36px}
  .flow-grid{grid-template-columns:minmax(0,1fr);gap:26px}
  .flow-item.rev .flow-grid .flow-media{order:0}
  .entry-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-band .container{grid-template-columns:minmax(0,1fr);gap:32px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .page-hero{padding:112px 0 52px}
  .anchor-section{padding:64px 0 12px}
  .flow-item{padding:40px 0}
  .metric-band{grid-template-columns:repeat(2,minmax(0,1fr));padding:26px 22px;gap:22px}
  .metric-band .metric{border-left:0;padding-left:0}
  .faq-section{padding:64px 0}
  .related-section{padding:0 0 64px}
  .entry-grid{grid-template-columns:minmax(0,1fr)}
  .cta-band{padding:64px 0}
  .site-footer{padding:56px 0 28px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:30px;padding-bottom:32px}
  .float-cta{
    left:0;right:0;bottom:0;gap:10px;
    padding:12px 16px calc(12px + env(safe-area-inset-bottom));
    background:rgba(246,245,242,.97);border-top:1px solid var(--line);transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0)}
  .float-cta .btn{flex:1 1 70%;border-radius:var(--r-s)}
  .float-icon{display:inline-flex;flex:0 0 48px}
  body{padding-bottom:76px}
}
@media (max-width:520px){
  body{font-size:16px}
  .logo-text{font-size:15.5px}
  .side-nav{grid-template-columns:minmax(0,1fr)}
  .flow-media img{aspect-ratio:4/3}
  .site-footer{padding-bottom:96px}
  .footer-bottom{flex-direction:column;gap:6px}
}

/* roulang page: category2 */
:root{
  --ink:#0B0C0E;
  --deep:#17191C;
  --accent:#E2542A;
  --accent-d:#B93F1C;
  --accent-soft:#FDEDE6;
  --secondary:#2F6F6B;
  --secondary-soft:#E9F1F0;
  --paper:#F6F5F2;
  --surface:#FFFFFF;
  --line:#E3E1DC;
  --line-strong:#CFCCC5;
  --muted:#6E6E73;
  --ok:#2F7A4F;
  --warn:#B7791F;
  --err:#C0392B;
  --r-s:2px;
  --r-m:4px;
  --r-l:6px;
  --sh-1:0 1px 2px rgba(11,12,14,.04);
  --sh-2:0 14px 36px -14px rgba(11,12,14,.18);
  --ease:cubic-bezier(.2,.7,.2,1);
  --dur:180ms;
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0 0 0;
  background:var(--paper);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease);}
a:hover{color:var(--accent);}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:none;background:none;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-0.01em;line-height:1.2;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:var(--r-s);}
.mono{font-family:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
section{scroll-margin-top:88px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,245,242,.94);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--dur) var(--ease),background var(--dur) var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-1);background:rgba(246,245,242,.98);}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:64px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:32px;height:32px;
  display:flex;align-items:center;justify-content:center;
  background:var(--ink);color:#fff;
  font-size:13px;font-weight:800;letter-spacing:.04em;
  border-radius:var(--r-s);
}
.logo-text{font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;}
.nav-chips{
  display:flex;align-items:center;gap:4px;
  padding:4px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:999px;
}
.chip{
  display:inline-block;
  padding:8px 16px;
  border-radius:999px;
  font-size:14px;
  color:var(--muted);
  white-space:nowrap;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.chip:hover{color:var(--ink);}
.chip.is-active{background:var(--ink);color:#fff;}
.nav-actions{display:flex;align-items:center;gap:16px;margin-left:24px;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--r-m);
}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--ink);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:1.5px;background:var(--ink);
  transition:transform var(--dur) var(--ease);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.mobile-drawer{
  display:none;
  position:fixed;
  inset:64px 0 0 0;
  z-index:55;
  background:var(--ink);
  padding:32px 24px 40px;
  overflow-y:auto;
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a{
  display:block;
  padding:18px 0;
  color:#fff;
  font-size:22px;
  font-weight:700;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.mobile-drawer a:hover,.mobile-drawer a.is-active{color:var(--accent);}
.mobile-drawer .btn{margin-top:28px;width:100%;justify-content:center;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;
  border-radius:var(--r-s);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
  white-space:nowrap;
}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-d);color:#fff;transform:translateX(1px);}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn-ghost:hover{background:var(--ink);color:#fff;}
.btn-light{border-color:rgba(255,255,255,.4);color:#fff;background:transparent;}
.btn-light:hover{background:#fff;color:var(--ink);border-color:#fff;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.4;pointer-events:none;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--line-strong);
  padding-bottom:2px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.link-arrow:hover{color:var(--accent);border-color:var(--accent);}

/* ---------- hero ---------- */
.hero-narrow{
  position:relative;
  min-height:42vh;
  display:flex;align-items:flex-end;
  color:#fff;
  background-image:linear-gradient(105deg,rgba(11,12,14,.92) 0%,rgba(11,12,14,.72) 55%,rgba(11,12,14,.86) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  padding:72px 0 56px;
}
.hero-narrow::after{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  pointer-events:none;
  opacity:.5;
}
.hero-narrow .container{position:relative;z-index:2;}
.breadcrumb{display:flex;gap:8px;align-items:center;font-size:12px;color:rgba(255,255,255,.62);margin-bottom:20px;flex-wrap:wrap;}
.breadcrumb a{color:rgba(255,255,255,.62);}
.breadcrumb a:hover{color:var(--accent);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;
  color:var(--accent);
  font-weight:700;
  margin-bottom:18px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent);display:block;}
.hero-narrow h1{
  font-size:clamp(34px,4.6vw,56px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.08;
  margin-bottom:18px;
}
.hero-narrow .hero-sub{
  max-width:640px;
  font-size:17px;
  color:rgba(255,255,255,.78);
  line-height:1.8;
}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.chips-pill{
  display:inline-flex;align-items:center;
  padding:7px 14px;
  border:1px solid rgba(255,255,255,.24);
  border-radius:999px;
  font-size:13px;
  color:rgba(255,255,255,.85);
}
.hero-metrics{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
  margin-top:40px;
  padding-top:24px;
  border-top:1px solid rgba(255,255,255,.14);
  max-width:720px;
}
.hero-metrics .num{font-size:clamp(22px,2.4vw,30px);font-weight:700;letter-spacing:-.01em;}
.hero-metrics .lbl{font-size:12px;letter-spacing:.08em;color:rgba(255,255,255,.6);margin-top:2px;}

/* ---------- section base ---------- */
.section{padding:88px 0;}
.section + .section{border-top:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head h2{
  font-size:clamp(28px,3.4vw,42px);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.02em;
  margin-bottom:16px;
}
.section-head p{color:var(--muted);font-size:16px;}
.section-label{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.12em;font-weight:700;
  color:var(--secondary);
  margin-bottom:16px;
}
.section-label .idx{
  display:inline-flex;align-items:center;justify-content:center;
  width:24px;height:24px;
  border:1px solid var(--line-strong);
  font-size:11px;
  color:var(--ink);
}

/* ---------- intro ---------- */
.intro-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:56px;
  align-items:center;
}
.intro-copy p{color:var(--muted);margin-bottom:18px;font-size:16.5px;max-width:600px;}
.intro-copy .lead{
  color:var(--ink);
  font-size:19px;
  line-height:1.75;
  font-weight:600;
  margin-bottom:24px;
}
.intro-media{position:relative;}
.intro-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--r-m);
  border:1px solid var(--line);
}
.intro-media .tag-float{
  position:absolute;left:20px;bottom:20px;
  background:var(--surface);
  border:1px solid var(--line);
  border-left:3px solid var(--accent);
  padding:12px 16px;
  font-size:13px;
  color:var(--ink);
  box-shadow:var(--sh-2);
}
.intro-facts{display:flex;flex-wrap:wrap;gap:32px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line);}
.intro-facts div{min-width:120px;}
.intro-facts .num{font-size:24px;font-weight:700;}
.intro-facts .lbl{font-size:12px;color:var(--muted);letter-spacing:.06em;}

/* ---------- capability grid (1 big 2 small) ---------- */
.cap-grid{
  display:grid;
  grid-template-columns:1.35fr 1fr;
  grid-template-rows:auto auto;
  gap:24px;
}
.cap-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  padding:32px;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.cap-card:hover{transform:translateY(-2px);border-color:rgba(226,84,42,.35);box-shadow:var(--sh-2);}
.cap-card.is-large{grid-row:span 2;display:flex;flex-direction:column;}
.cap-card.is-large img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-s);margin-bottom:26px;
}
.icon-box{
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--r-s);
  color:var(--accent);
  margin-bottom:18px;
}
.icon-box svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.cap-card h3{font-size:20px;font-weight:700;margin-bottom:12px;}
.cap-card p{color:var(--muted);font-size:15.5px;}
.cap-card .cap-meta{margin-top:auto;padding-top:24px;display:flex;gap:10px;flex-wrap:wrap;}
.badge{
  display:inline-flex;align-items:center;
  font-size:12px;letter-spacing:.08em;
  padding:4px 10px;
  border-radius:999px;
  background:var(--secondary-soft);
  color:var(--secondary);
  font-weight:600;
}
.badge.accent{background:var(--accent-soft);color:var(--accent-d);}
.badge.square{border-radius:var(--r-s);background:var(--paper);color:var(--muted);border:1px solid var(--line);}

/* ---------- dark band ---------- */
.band-dark{
  background:var(--ink);
  color:#fff;
  padding:64px 0;
}
.band-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:32px;
}
.band-item{border-left:1px solid rgba(255,255,255,.16);padding-left:20px;}
.band-item .num{
  font-size:clamp(26px,3vw,34px);
  font-weight:700;
  letter-spacing:-.02em;
}
.band-item .lbl{font-size:13px;color:rgba(255,255,255,.6);margin-top:6px;line-height:1.6;}
.band-quote{
  margin-top:48px;padding-top:32px;border-top:1px solid rgba(255,255,255,.14);
  font-size:clamp(18px,2.2vw,24px);
  font-weight:700;
  line-height:1.5;
  max-width:860px;
}
.band-quote span{color:var(--accent);}

/* ---------- steps ---------- */
.steps{display:flex;flex-direction:column;}
.step{
  display:grid;
  grid-template-columns:88px 1fr;
  gap:24px;
  padding:32px 0;
  border-top:1px solid var(--line);
  transition:background var(--dur) var(--ease);
}
.step:last-child{border-bottom:1px solid var(--line);}
.step:hover{background:var(--accent-soft);}
.step .step-num{
  font-size:14px;font-weight:700;color:var(--accent);letter-spacing:.08em;padding-top:4px;
}
.step h3{font-size:19px;font-weight:700;margin-bottom:10px;}
.step p{color:var(--muted);font-size:15.5px;max-width:720px;}
.step .step-tagline{font-size:13px;color:var(--secondary);margin-top:10px;font-weight:600;}

/* ---------- table ---------- */
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-m);background:var(--surface);}
table.plan-table{width:100%;border-collapse:collapse;min-width:760px;}
table.plan-table th,table.plan-table td{
  padding:18px 20px;
  text-align:left;
  font-size:15px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
table.plan-table thead th{
  background:var(--paper);
  font-size:14px;
  font-weight:700;
  color:var(--ink);
  letter-spacing:.02em;
}
table.plan-table thead th.col-name{font-size:16px;}
table.plan-table tbody th{
  font-weight:600;
  color:var(--muted);
  font-size:14px;
  width:180px;
  background:var(--surface);
}
table.plan-table td{color:var(--ink);}
table.plan-table .col-rec{background:rgba(226,84,42,.05);}
table.plan-table thead th.col-rec{color:var(--accent-d);position:relative;}
.rec-flag{
  display:inline-block;margin-left:8px;padding:2px 8px;
  background:var(--accent);color:#fff;font-size:11px;border-radius:999px;letter-spacing:.06em;
}
.price-cell{font-weight:700;font-size:16px;}
.price-cell small{display:block;font-weight:400;color:var(--muted);font-size:13px;margin-top:4px;}
.table-note{font-size:13px;color:var(--muted);margin-top:14px;}

/* ---------- faq ---------- */
.faq-grid{display:grid;grid-template-columns:.9fr 1.4fr;gap:56px;align-items:start;}
.faq-aside p{color:var(--muted);font-size:15.5px;margin-top:14px;max-width:340px;}
.faq-aside .contact-line{margin-top:24px;padding-top:20px;border-top:1px solid var(--line);font-size:15px;}
.faq-aside .contact-line strong{display:block;font-size:18px;margin-bottom:4px;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;
  text-align:left;
  font-size:18px;
  font-weight:600;
  color:var(--ink);
  transition:color var(--dur) var(--ease);
}
.faq-q:hover{color:var(--accent);}
.faq-q .sign{
  position:relative;flex:0 0 auto;width:16px;height:16px;
}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;background:currentColor;transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.faq-q .sign::before{left:0;top:7px;width:16px;height:1.5px;}
.faq-q .sign::after{left:7px;top:0;width:1.5px;height:16px;}
.faq-item.is-open .faq-q{color:var(--accent);}
.faq-item.is-open .faq-q .sign::after{transform:rotate(90deg);opacity:0;}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height 260ms var(--ease);
}
.faq-a p{
  max-width:720px;
  padding:0 4px 26px;
  color:var(--muted);
  font-size:16px;
}
.faq-item.is-open .faq-a{max-height:400px;}

/* ---------- form ---------- */
.form-section{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.form-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:64px;align-items:start;}
.form-copy h2{font-size:clamp(26px,3vw,36px);font-weight:800;letter-spacing:-.02em;margin-bottom:16px;}
.form-copy p{color:var(--muted);font-size:16px;margin-bottom:20px;max-width:420px;}
.form-points li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:15px;color:var(--muted);padding:8px 0;
}
.form-points li::before{
  content:"";flex:0 0 auto;width:8px;height:8px;margin-top:9px;
  background:var(--accent);
}
form.consult{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1 / -1;}
.field label{font-size:14px;color:var(--muted);}
.field label .req{color:var(--accent);margin-left:2px;}
.field input,.field select,.field textarea{
  height:48px;
  padding:0 14px;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--r-s);
  font-size:15px;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease);
}
.field textarea{height:120px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  background:#fff;
  border-color:var(--accent);
  box-shadow:0 0 0 2px rgba(226,84,42,.18);
}
.field.has-error input,.field.has-error textarea{border-color:var(--err);}
.field .err-msg{font-size:13px;color:var(--err);display:none;}
.field.has-error .err-msg{display:block;}
.form-actions{grid-column:1 / -1;display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.form-status{
  grid-column:1 / -1;
  display:none;
  padding:12px 16px;
  font-size:14px;
  border-radius:var(--r-s);
  border-left:3px solid var(--ok);
  background:rgba(47,122,79,.08);
  color:var(--ok);
}
.form-status.is-error{border-left-color:var(--err);background:rgba(192,57,43,.08);color:var(--err);}
.form-status.is-visible{display:block;}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;
  background:var(--ink);
  color:#fff;
  padding:80px 0;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:72px 72px;
  pointer-events:none;
}
.cta-band .container{position:relative;z-index:2;display:flex;justify-content:space-between;gap:48px;align-items:center;flex-wrap:wrap;}
.cta-band h2{
  font-size:clamp(28px,3.6vw,46px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.12;
  max-width:640px;
}
.cta-band .cta-side{display:flex;flex-direction:column;gap:16px;align-items:flex-start;}
.cta-band .cta-side .meta{font-size:14px;color:rgba(255,255,255,.65);}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 32px;font-size:15px;}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand .logo-text{color:#fff;}
.footer-brand p{margin-top:18px;font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px;}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:18px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{color:rgba(255,255,255,.72);font-size:14.5px;}
.footer-col a:hover{color:var(--accent);}
.footer-col p{font-size:14.5px;color:rgba(255,255,255,.62);margin-bottom:8px;line-height:1.75;}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:24px;
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* ---------- float cta ---------- */
.float-cta{
  position:fixed;
  right:32px;bottom:32px;
  z-index:70;
  display:flex;align-items:center;gap:10px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta .icon-btn{
  width:48px;height:48px;
  display:flex;align-items:center;justify-content:center;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--ink);
  box-shadow:var(--sh-2);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.float-cta .icon-btn:hover{background:var(--ink);color:#fff;}
.float-cta .icon-btn svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.float-cta .btn{border-radius:999px;box-shadow:var(--sh-2);}
.float-cta .mobile-extra{display:none;}

/* ---------- states ---------- */
.state-empty{
  text-align:center;padding:64px 24px;color:var(--muted);
  border:1px dashed var(--line-strong);border-radius:var(--r-m);background:var(--surface);
}
.state-empty svg{width:28px;height:28px;stroke:var(--muted);fill:none;stroke-width:1.5;margin:0 auto 16px;}
.state-empty p{margin-bottom:18px;font-size:15px;}

/* ---------- responsive ---------- */
@media (min-width:1440px){:root{--container:1320px;}}
@media (max-width:1200px){
  .intro-grid,.faq-grid,.form-grid{gap:40px;}
  .band-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:1024px){
  .nav-chips{
    overflow-x:auto;
    scrollbar-width:none;
    -webkit-overflow-scrolling:touch;
    max-width:52vw;
  }
  .nav-chips::-webkit-scrollbar{display:none;}
  .intro-grid{grid-template-columns:1fr;gap:32px;}
  .cap-grid{grid-template-columns:1fr;}
  .cap-card.is-large{grid-row:auto;}
  .faq-grid,.form-grid{grid-template-columns:1fr;}
  .section{padding:72px 0;}
}
@media (max-width:768px){
  body{font-size:16px;padding-bottom:88px;}
  .container{padding:0 20px;}
  .nav-chips,.nav-actions .btn-sm{display:none;}
  .nav-toggle{display:flex;}
  .nav-wrap{height:56px;}
  .mobile-drawer{inset:56px 0 0 0;}
  .hero-narrow{min-height:78vh;padding:64px 0 44px;}
  .hero-metrics{grid-template-columns:1fr;gap:18px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .band-grid{grid-template-columns:1fr;gap:22px;}
  .band-item{border-left:none;border-top:1px solid rgba(255,255,255,.16);padding-left:0;padding-top:16px;}
  .step{grid-template-columns:1fr;gap:8px;padding:24px 0;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .cta-band{padding:56px 0;}
  .cta-band .container{flex-direction:column;align-items:flex-start;gap:28px;}
  form.consult{grid-template-columns:1fr;}
  .float-cta{
    right:0;left:0;bottom:0;
    gap:8px;
    padding:12px 16px;
    background:rgba(246,245,242,.96);
    border-top:1px solid var(--line);
    transform:translateY(0);
    opacity:1;visibility:visible;
  }
  .float-cta .btn{border-radius:var(--r-s);flex:1 1 auto;}
  .float-cta .icon-btn{border-radius:var(--r-s);width:48px;flex:0 0 auto;}
  .float-cta .mobile-extra{display:flex;}
  .float-cta.is-near-footer{transform:translateY(120%);opacity:0;visibility:hidden;}
}
@media (max-width:520px){
  .hero-narrow h1{font-size:clamp(30px,8vw,38px);}
  .intro-media img{aspect-ratio:4/3;}
  .cap-card{padding:24px;}
  .faq-q{font-size:16.5px;padding:18px 2px;}
  .btn{height:46px;padding:0 20px;}
  .cta-band h2{font-size:clamp(26px,7vw,32px);}
}