/* roulang page: index */
:root{
  --brand-700:#1E4D42;
  --brand-600:#2A6A5A;
  --brand-100:#DCE9E3;
  --accent-600:#A85B2B;
  --accent-700:#8E4A22;
  --accent-100:#F6E7DA;
  --ink-900:#14201C;
  --ink-600:#4A5A54;
  --ink-400:#8A968F;
  --line:#E2DCD0;
  --paper:#FAF7F1;
  --paper-2:#F2EDE3;
  --white:#FFFFFF;
  --sh-1:0 1px 2px rgba(20,32,28,.05),0 8px 20px -14px rgba(20,32,28,.22);
  --sh-2:0 2px 6px rgba(20,32,28,.06),0 20px 40px -22px rgba(20,32,28,.32);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --nav-h:74px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand-600);text-decoration:none;transition:color .25s ease;}
a:hover{color:var(--accent-600);}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
h1,h2,h3,h4{font-family:var(--serif);margin:0;color:var(--ink-900);font-weight:700;letter-spacing:.01em;}
h1{font-size:clamp(28px,4.4vw,46px);line-height:1.24;}
h2{font-size:clamp(22px,2.8vw,34px);line-height:1.32;}
h3{font-size:clamp(18px,1.8vw,22px);line-height:1.45;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
strong{font-weight:700;}
:focus-visible{outline:2px solid var(--accent-600);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section-alt{background:var(--paper-2);}
.section-white{background:var(--white);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:52px;flex-wrap:wrap;}
.section-head p{margin:12px 0 0;color:var(--ink-600);font-size:17px;max-width:640px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.08em;color:var(--brand-600);
  text-transform:none;margin:0 0 14px;font-weight:500;
}
.eyebrow::before{
  content:"";width:8px;height:8px;background:var(--accent-600);
  border-radius:2px;display:inline-block;
}
.lead{font-size:clamp(16px,1.6vw,19px);line-height:1.75;color:var(--ink-600);}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;color:var(--brand-600);font-weight:500;white-space:nowrap;}
.link-more span{transition:transform .25s ease;}
.link-more:hover span{transform:translateX(4px);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15.5px;font-weight:500;line-height:1;
  transition:transform .2s ease,background-color .25s ease,color .25s ease,box-shadow .25s ease,border-color .25s ease;
  border:1px solid transparent;white-space:nowrap;
}
.btn-primary{background:var(--accent-600);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--accent-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(1px);box-shadow:none;}
.btn-outline{border-color:var(--line);color:var(--brand-700);background:transparent;}
.btn-outline:hover{border-color:var(--accent-600);background:var(--accent-100);color:var(--accent-700);}
.btn-outline:active{transform:translateY(1px);}
.btn-light{background:#fff;color:var(--brand-700);box-shadow:var(--sh-1);}
.btn-light:hover{background:var(--paper-2);color:var(--brand-700);transform:translateY(-1px);}
.btn-link{color:var(--brand-600);padding:0;height:auto;}
.btn-sm{height:40px;padding:0 18px;font-size:14.5px;}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(250,247,241,.88);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .3s ease,border-color .3s ease,background-color .3s ease;
}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 6px 18px -14px rgba(20,32,28,.35);}
.nav-wrap{display:flex;align-items:center;gap:28px;height:var(--nav-h);transition:height .3s ease;}
.site-header.is-stuck .nav-wrap{height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:28px;height:28px;border-radius:8px;flex:0 0 auto;
  background:linear-gradient(150deg,var(--brand-600),var(--brand-700));
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;left:6px;right:6px;top:13px;height:2px;
  background:var(--accent-100);border-radius:2px;
  box-shadow:0 -5px 0 -0.5px rgba(246,231,218,.6),0 5px 0 -0.5px rgba(246,231,218,.6);
}
.brand-name{font-family:var(--serif);font-size:19px;font-weight:700;color:var(--brand-700);letter-spacing:.02em;}
.nav-links{display:flex;align-items:center;gap:20px;margin-left:auto;flex-wrap:nowrap;}
.nav-links a{
  position:relative;font-size:14.5px;color:var(--ink-600);padding:6px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent-600);
  transform:scaleX(0);transform-origin:left;transition:transform .28s ease;
}
.nav-links a:hover{color:var(--brand-700);}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active{color:var(--brand-700);font-weight:500;}
.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-btn);
  border:1px solid var(--line);background:#fff;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle i{display:block;width:18px;height:2px;background:var(--brand-700);border-radius:2px;transition:transform .28s ease,opacity .2s ease;}
.nav-toggle.is-open i:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open i:nth-child(2){opacity:0;}
.nav-toggle.is-open i:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.drawer{
  position:fixed;inset:var(--nav-h) 0 0 0;background:var(--paper);z-index:75;
  padding:28px 24px 120px;overflow-y:auto;
  transform:translateY(-12px);opacity:0;pointer-events:none;transition:opacity .28s ease,transform .28s ease;
}
.drawer.is-open{opacity:1;transform:none;pointer-events:auto;}
.drawer a{display:flex;align-items:center;min-height:52px;font-size:17px;color:var(--ink-900);border-bottom:1px solid var(--line);}
.drawer a.active{color:var(--brand-600);font-weight:500;}
.drawer-cta{position:fixed;left:0;right:0;bottom:0;padding:12px 24px calc(12px + env(safe-area-inset-bottom));background:var(--paper-2);border-top:1px solid var(--line);}
.drawer-cta .btn{width:100%;height:52px;}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background-image:linear-gradient(108deg,rgba(20,32,28,.92) 0%,rgba(30,77,66,.88) 38%,rgba(30,77,66,.55) 66%,rgba(250,247,241,.86) 100%),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  padding:84px 0 0;
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;padding-bottom:76px;}
.hero-copy{color:#fff;max-width:640px;}
.hero-copy h1{color:#fff;text-shadow:0 2px 20px rgba(20,32,28,.35);}
.hero-sub{
  margin:22px 0 0;font-size:clamp(16px,1.5vw,18.5px);line-height:1.75;
  color:rgba(255,255,255,.88);max-width:520px;
}
.hero-actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap;}
.hero-stats{
  display:flex;gap:40px;margin-top:48px;padding-top:28px;
  border-top:1px solid rgba(255,255,255,.24);flex-wrap:wrap;
}
.hero-stats li{display:flex;flex-direction:column;gap:2px;}
.hero-stats strong{
  font-family:var(--serif);font-size:28px;line-height:1.2;color:#fff;
  font-variant-numeric:tabular-nums;
}
.hero-stats span{font-size:13px;color:rgba(255,255,255,.72);letter-spacing:.02em;}
.hero-visual{position:relative;}
.hero-card{
  background:rgba(255,255,255,.96);border-radius:var(--r-card);
  box-shadow:var(--sh-2);padding:16px;border:1px solid rgba(255,255,255,.7);
}
.hero-card img{border-radius:var(--r-img);width:100%;aspect-ratio:16/10;object-fit:cover;}
.hero-card-foot{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 6px 4px;
}
.hero-card-foot strong{font-family:var(--serif);font-size:17px;color:var(--brand-700);}
.hero-card-foot span{font-size:13px;color:var(--ink-400);}
.hero-badge{
  position:absolute;left:-14px;bottom:32px;background:var(--brand-700);color:#fff;
  padding:14px 20px;border-radius:var(--r-card);box-shadow:var(--sh-2);
  font-size:13.5px;line-height:1.5;max-width:210px;
}
.hero-badge strong{display:block;font-family:var(--serif);font-size:22px;margin-bottom:2px;}
.hero-divider{display:block;width:100%;height:26px;}

/* ---------- selling ---------- */
.selling-grid{display:grid;grid-template-columns:300px 1fr;gap:56px;align-items:start;}
.selling-side{position:sticky;top:110px;}
.selling-side p{margin-top:16px;color:var(--ink-600);font-size:15.5px;line-height:1.8;}
.selling-list{border-top:1px solid var(--line);}
.selling-item{
  display:grid;grid-template-columns:64px 1fr 28px;gap:24px;align-items:center;
  padding:28px 16px;border-bottom:1px solid var(--line);
  transition:background-color .28s ease;cursor:default;
}
.selling-item:hover{background:var(--paper-2);}
.selling-num{
  width:52px;height:52px;border-radius:10px;background:var(--brand-100);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--serif);font-size:20px;color:var(--brand-700);
  transition:background-color .28s ease,color .28s ease;
}
.selling-item:hover .selling-num{background:var(--accent-100);color:var(--accent-700);}
.selling-body h3{font-size:19px;margin-bottom:8px;}
.selling-body p{color:var(--ink-600);font-size:15.5px;line-height:1.8;margin:0;}
.selling-arrow{color:var(--ink-400);font-size:20px;transition:transform .28s ease,color .28s ease;}
.selling-item:hover .selling-arrow{transform:translateX(4px);color:var(--accent-600);}

/* ---------- demo ---------- */
.demo-window{
  border-radius:var(--r-card);border:1px solid var(--line);background:#fff;
  box-shadow:var(--sh-2);overflow:hidden;margin-bottom:56px;
}
.demo-bar{display:flex;align-items:center;gap:8px;padding:14px 18px;border-bottom:1px solid var(--line);background:var(--paper-2);}
.demo-bar i{width:10px;height:10px;border-radius:50%;background:#D8D0C2;display:block;}
.demo-bar span{margin-left:10px;font-size:13px;color:var(--ink-400);}
.demo-window img{width:100%;aspect-ratio:16/8;object-fit:cover;}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;}
.steps::before{
  content:"";position:absolute;top:19px;left:6%;right:6%;height:1px;background:var(--line);
}
.step{position:relative;padding:0 20px;text-align:center;}
.step-dot{
  width:38px;height:38px;border-radius:50%;background:#fff;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;margin:0 auto 18px;
  font-family:var(--serif);font-size:15px;color:var(--brand-700);position:relative;z-index:1;
  box-shadow:var(--sh-1);
}
.step h3{font-size:17px;margin-bottom:8px;}
.step p{font-size:14.5px;color:var(--ink-600);line-height:1.75;margin:0;}

/* ---------- proof ---------- */
.proof-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:24px;align-items:stretch;}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;transition:transform .3s ease,box-shadow .3s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.proof-main{display:flex;flex-direction:column;}
.proof-main img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease;}
.proof-main:hover img{transform:scale(1.04);}
.proof-body{padding:26px 28px 30px;}
.proof-body h3{font-size:20px;margin-bottom:12px;}
.proof-body p{color:var(--ink-600);font-size:15.5px;line-height:1.8;margin:0;}
.proof-metric{
  display:flex;gap:28px;margin-top:22px;padding-top:20px;border-top:1px solid var(--line);
}
.proof-metric div strong{display:block;font-family:var(--serif);font-size:26px;color:var(--brand-700);font-variant-numeric:tabular-nums;}
.proof-metric div span{font-size:13px;color:var(--ink-400);}
.quote{padding:30px 28px;display:flex;flex-direction:column;justify-content:space-between;}
.quote p{font-size:16px;line-height:1.85;color:var(--ink-600);}
.quote footer{margin-top:24px;padding-top:18px;border-top:1px solid var(--line);}
.quote footer strong{display:block;font-size:15px;color:var(--ink-900);font-weight:500;}
.quote footer span{font-size:13px;color:var(--ink-400);}
.proof-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:56px;
  padding-top:40px;border-top:1px solid var(--line);
}
.proof-stats li strong{
  display:block;font-family:var(--serif);font-size:32px;color:var(--brand-700);
  line-height:1.25;font-variant-numeric:tabular-nums;
}
.proof-stats li span{font-size:14px;color:var(--ink-600);}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .3s ease,box-shadow .3s ease;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.news-cover{position:relative;display:block;overflow:hidden;}
.news-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease;}
.news-card:hover .news-cover img{transform:scale(1.04);}
.tag-chip{
  position:absolute;left:14px;top:14px;
  background:rgba(250,247,241,.94);color:var(--brand-600);
  font-size:12.5px;letter-spacing:.04em;padding:4px 10px;border-radius:6px;
}
.news-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1;}
.news-body h3{font-size:18px;line-height:1.5;margin-bottom:12px;}
.news-body h3 a{color:var(--ink-900);}
.news-body h3 a:hover{color:var(--brand-600);}
.news-excerpt{
  font-size:15px;line-height:1.75;color:var(--ink-600);margin:0 0 20px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;display:flex;align-items:center;gap:10px;
  font-size:13px;color:var(--ink-400);font-variant-numeric:tabular-nums;
}
.news-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--ink-400);display:block;}
.empty-state{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;
  border:1px dashed var(--line);border-radius:var(--r-card);background:#fff;text-align:center;padding:40px 24px;
}
.empty-state p{color:var(--ink-600);font-size:15px;margin:0;}

/* ---------- price ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
.price-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:34px 30px 36px;box-shadow:var(--sh-1);position:relative;
  transition:transform .3s ease,box-shadow .3s ease;display:flex;flex-direction:column;
}
.price-card:hover{box-shadow:var(--sh-2);}
.price-card.featured{transform:translateY(-12px);border-top:3px solid var(--accent-600);box-shadow:var(--sh-2);}
.price-card.featured:hover{transform:translateY(-14px);}
.price-chip{
  position:absolute;right:24px;top:-13px;background:var(--accent-600);color:#fff;
  font-size:12.5px;padding:3px 12px;border-radius:999px;letter-spacing:.04em;
}
.price-card h3{font-size:19px;margin-bottom:6px;}
.price-desc{font-size:14.5px;color:var(--ink-600);margin:0 0 22px;line-height:1.7;}
.price-amount{font-family:var(--serif);font-size:34px;color:var(--brand-700);line-height:1.2;font-variant-numeric:tabular-nums;}
.price-amount small{font-family:var(--sans);font-size:14px;color:var(--ink-400);margin-left:6px;}
.price-feats{margin:24px 0 30px;padding-top:22px;border-top:1px solid var(--line);flex:1;}
.price-feats li{position:relative;padding-left:26px;font-size:15px;color:var(--ink-600);line-height:1.8;margin-bottom:10px;}
.price-feats li::before{
  content:"";position:absolute;left:2px;top:10px;width:11px;height:6px;
  border-left:2px solid var(--brand-600);border-bottom:2px solid var(--brand-600);
  transform:rotate(-45deg);border-radius:1px;
}
.price-card .btn{width:100%;}

/* ---------- faq ---------- */
.faq-grid{display:grid;grid-template-columns:340px 1fr;gap:56px;align-items:start;}
.faq-side{position:sticky;top:110px;}
.faq-side p{color:var(--ink-600);font-size:15.5px;margin:16px 0 26px;line-height:1.8;}
.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:17px;font-weight:500;color:var(--ink-900);
  transition:color .25s ease;
}
.faq-q:hover{color:var(--brand-600);}
.faq-q i{
  flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform .3s ease;
}
.faq-q i::before,.faq-q i::after{
  content:"";position:absolute;background:var(--brand-600);border-radius:2px;
}
.faq-q i::before{left:0;right:0;top:10px;height:2px;}
.faq-q i::after{top:0;bottom:0;left:10px;width:2px;transition:opacity .25s ease;}
.faq-item.is-open .faq-q i{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a p{padding:0 40px 24px 4px;font-size:15px;line-height:1.85;color:var(--ink-600);margin:0;}

/* ---------- contact ---------- */
.contact-cta{
  position:relative;overflow:hidden;background:var(--brand-700);color:#fff;
  padding:88px 0;
}
.contact-cta::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;opacity:.16;
}
.contact-inner{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start;}
.contact-copy h2{color:#fff;}
.contact-copy p{color:rgba(255,255,255,.82);margin-top:18px;font-size:16.5px;line-height:1.85;max-width:520px;}
.contact-points{margin-top:32px;display:flex;flex-direction:column;gap:14px;}
.contact-points li{display:flex;gap:12px;font-size:15px;color:rgba(255,255,255,.85);align-items:flex-start;}
.contact-points li::before{
  content:"";flex:0 0 auto;width:8px;height:8px;margin-top:8px;border-radius:2px;background:var(--accent-100);
}
.contact-actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap;}
.form-card{
  background:#fff;border-radius:var(--r-card);padding:34px 32px 36px;box-shadow:var(--sh-2);
}
.form-card h3{font-size:20px;margin-bottom:6px;}
.form-card > p{font-size:14.5px;color:var(--ink-600);margin-bottom:24px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13px;color:var(--ink-600);margin-bottom:7px;}
.field input,.field textarea,.field select{
  width:100%;border:1px solid var(--line);border-radius:var(--r-btn);
  background:var(--paper);padding:0 14px;height:46px;font-size:15px;color:var(--ink-900);
  transition:border-color .25s ease,box-shadow .25s ease,background-color .25s ease;
}
.field textarea{height:110px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--brand-600);background:#fff;
  box-shadow:0 0 0 3px var(--brand-100);
}
.field.has-error input,.field.has-error textarea{border-color:#B3453B;}
.field .err{display:none;font-size:13px;color:#B3453B;margin-top:6px;}
.field.has-error .err{display:block;}
.form-note{font-size:13px;color:var(--ink-400);margin-top:14px;}
.form-success{
  display:none;background:var(--brand-100);color:var(--brand-700);
  border-radius:var(--r-btn);padding:12px 16px;font-size:14.5px;margin-bottom:18px;
}
.form-success.is-show{display:block;}

/* ---------- footer ---------- */
.site-footer{background:var(--paper-2);border-top:1px solid var(--line);padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:56px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{font-size:14.5px;color:var(--ink-600);line-height:1.85;margin:0;max-width:320px;}
.footer-col h4{font-family:var(--sans);font-size:14px;font-weight:700;color:var(--ink-900);letter-spacing:.04em;margin-bottom:18px;}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul li a{font-size:14.5px;color:var(--ink-600);}
.footer-col ul li a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px;}
.footer-col p{font-size:14.5px;color:var(--ink-600);line-height:1.9;margin:0 0 10px;}
.qr-box{
  width:110px;height:110px;border:1px solid var(--line);border-radius:10px;background:#fff;
  display:flex;align-items:center;justify-content:center;font-size:12.5px;color:var(--ink-400);
  text-align:center;padding:10px;margin-top:6px;
}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:13.5px;color:var(--ink-400);
}
.footer-bottom a{color:var(--ink-400);}
.footer-bottom a:hover{color:var(--brand-600);}

/* ---------- floating ---------- */
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:70;display:flex;align-items:center;gap:10px;
  opacity:0;transform:translateY(10px);pointer-events:none;transition:opacity .4s ease,transform .4s ease;
}
.float-cta.is-show{opacity:1;transform:none;pointer-events:auto;}
.float-cta .btn{height:56px;padding:0 26px;border-radius:999px;font-size:15.5px;}
.to-top{
  width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--line);
  color:var(--brand-700);display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-1);font-size:16px;transition:transform .25s ease,box-shadow .25s ease;
}
.to-top:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}

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

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .nav-links{gap:14px;}
  .nav-links a{font-size:14px;}
  .proof-grid{grid-template-columns:1fr 1fr;}
  .proof-main{grid-column:1 / -1;}
}
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-copy{max-width:none;}
  .hero-badge{position:static;margin-top:16px;max-width:none;}
  .selling-grid{grid-template-columns:1fr;gap:32px;}
  .selling-side,.faq-side{position:static;}
  .faq-grid{grid-template-columns:1fr;gap:32px;}
  .steps{grid-template-columns:repeat(2,1fr);gap:36px 0;}
  .steps::before{display:none;}
  .price-grid{grid-template-columns:1fr 1fr;}
  .price-card.featured{transform:none;}
  .price-card.featured:hover{transform:translateY(-2px);}
  .contact-inner{grid-template-columns:1fr;gap:44px;}
}
@media (max-width:900px){
  .nav-links{display:none;}
  .nav-actions .btn-outline{display:none;}
  .nav-toggle{display:flex;}
}
@media (max-width:768px){
  .section{padding:52px 0;}
  .container{padding:0 20px;}
  .hero{padding-top:52px;}
  .hero-grid{padding-bottom:52px;}
  .hero-stats{gap:26px;margin-top:34px;}
  .hero-stats strong{font-size:24px;}
  .news-grid{grid-template-columns:1fr;}
  .proof-grid{grid-template-columns:1fr;}
  .proof-stats{grid-template-columns:1fr 1fr;gap:28px 20px;margin-top:40px;}
  .price-grid{grid-template-columns:1fr;}
  .selling-item{grid-template-columns:52px 1fr;gap:18px;padding:22px 12px;}
  .selling-arrow{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
  .section-head{margin-bottom:34px;}
  .float-cta{right:16px;left:16px;bottom:0;padding:10px 0 calc(10px + env(safe-area-inset-bottom));background:rgba(250,247,241,.96);backdrop-filter:blur(8px);border-top:1px solid var(--line);gap:10px;}
  .float-cta .btn{flex:1;height:52px;border-radius:10px;}
  .to-top{width:52px;height:52px;border-radius:10px;}
  .price-card{padding:30px 24px 32px;}
  .form-card{padding:28px 22px 30px;}
  .contact-cta{padding:56px 0;}
}
@media (max-width:520px){
  body{font-size:16px;}
  .footer-grid{grid-template-columns:1fr;}
  .proof-stats{grid-template-columns:1fr 1fr;}
  .steps{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --brand-700:#1E4D42;
  --brand-600:#2A6A5A;
  --brand-100:#DCE9E3;
  --accent-600:#A85B2B;
  --accent-700:#8E4A22;
  --accent-100:#F6E7DA;
  --ink-900:#14201C;
  --ink-600:#4A5A54;
  --ink-400:#8A968F;
  --line:#E2DCD0;
  --paper:#FAF7F1;
  --paper-2:#F2EDE3;
  --white:#FFFFFF;
  --danger:#B3453B;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --r-tag:6px;
  --sh-1:0 1px 2px rgba(20,32,28,.05),0 8px 20px -14px rgba(20,32,28,.22);
  --sh-2:0 2px 6px rgba(20,32,28,.06),0 20px 40px -22px rgba(20,32,28,.28);
  --nav-h:74px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-top:var(--nav-h);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.9;
  color:var(--ink-600);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--ink-900);margin:0;font-weight:700}
p{margin:0 0 1.1em}
ul,ol{margin:0;padding:0}
button{font-family:inherit;font-size:inherit}
[id]{scroll-margin-top:96px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;font-size:15px;font-weight:500;line-height:1;
  border:1px solid transparent;border-radius:var(--r-btn);cursor:pointer;
  transition:background-color .22s ease,color .22s ease,border-color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.btn-sm{height:44px;padding:0 20px;font-size:14.5px}
.btn-primary{background:var(--accent-600);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--accent-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{background:transparent;color:var(--brand-700);border-color:var(--line)}
.btn-ghost:hover{background:var(--accent-100);color:var(--accent-700);border-color:var(--accent-100)}
.btn-ghost:active{transform:translateY(1px)}
.btn-text{background:none;color:var(--brand-600);padding:0 4px;height:auto}
.btn-text:hover{color:var(--brand-700);text-decoration:underline;text-underline-offset:3px}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
a:focus-visible,button:focus-visible,input:focus-visible,.btn:focus-visible{outline:2px solid var(--accent-600);outline-offset:2px}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--r-tag);
  background:var(--paper-2);color:var(--brand-600);font-size:12.5px;letter-spacing:.08em;
}
/* 导航 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  height:var(--nav-h);
  background:rgba(250,247,241,.94);
  border-bottom:1px solid transparent;
  transition:height .25s ease,background-color .25s ease,border-color .25s ease;
}
.site-header.is-stuck{
  height:64px;
  background:rgba(250,247,241,.86);
  border-bottom-color:var(--line);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.nav-wrap{display:flex;align-items:center;gap:22px;height:100%}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink-900);font-weight:700;font-size:18px;letter-spacing:.01em}
.brand:hover{color:var(--brand-700)}
.brand-mark{width:28px;height:28px;flex:0 0 28px}
.nav-links{display:flex;align-items:center;gap:26px;margin:0 auto}
.nav-links a{
  position:relative;display:inline-block;padding:6px 0;font-size:15px;color:var(--ink-600);
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;
  background:var(--accent-600);transform:scaleX(0);transform-origin:left;transition:transform .26s ease;
}
.nav-links a:hover{color:var(--ink-900)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a[aria-current="page"]{color:var(--brand-700);font-weight:500}
.nav-links a[aria-current="page"]::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-btn);cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-900);transition:transform .25s ease;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-drawer{
  position:fixed;top:var(--nav-h);left:0;right:0;bottom:0;z-index:79;
  background:var(--paper);padding:24px;display:flex;flex-direction:column;
  transform:translateX(100%);transition:transform .3s ease;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.mobile-drawer a{
  display:flex;align-items:center;min-height:52px;font-size:16px;color:var(--ink-900);
  border-bottom:1px solid var(--line);
}
.mobile-drawer a:hover{color:var(--brand-600)}
.mobile-drawer .drawer-cta{margin-top:auto;width:100%;height:56px}
/* 文章头 */
.article-hero{
  background:linear-gradient(180deg,var(--brand-100) 0%,var(--paper) 100%);
  padding:56px 0 44px;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-400);margin-bottom:18px}
.breadcrumb a{color:var(--ink-400)}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--ink-600);max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-hero h1{
  font-size:clamp(26px,3.4vw,36px);
  line-height:1.34;
  letter-spacing:.01em;
  max-width:900px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:20px;font-size:13.5px;color:var(--ink-400)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line);display:inline-block}
.num{font-variant-numeric:tabular-nums}
/* 布局 */
.article-layout{
  display:grid;grid-template-columns:minmax(0,780px) 240px;gap:56px;justify-content:center;
  padding:56px 0 72px;
}
.article-layout.no-toc{grid-template-columns:minmax(0,780px)}
.article-body{max-width:780px;font-size:16.5px;line-height:1.9;color:var(--ink-600)}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.1em}
.article-body h2{
  font-size:clamp(20px,2.2vw,24px);line-height:1.45;color:var(--ink-900);
  margin:40px 0 16px;padding-left:14px;border-left:4px solid var(--brand-100);
}
.article-body h3{font-size:18px;line-height:1.5;color:var(--ink-900);margin:28px 0 12px}
.article-body h4{font-size:16.5px;margin:22px 0 10px}
.article-body strong{color:var(--ink-900)}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:0;list-style:none}
.article-body ol{counter-reset:olcount}
.article-body li{position:relative;padding-left:22px;margin-bottom:.55em}
.article-body ul>li::before{
  content:"";position:absolute;left:4px;top:.85em;width:6px;height:6px;background:var(--brand-600);border-radius:2px;
}
.article-body ol>li{counter-increment:olcount}
.article-body ol>li::before{
  content:counter(olcount);position:absolute;left:0;top:.15em;font-size:13px;color:var(--accent-600);font-weight:700;
}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--paper-2);
  border-left:3px solid var(--brand-100);border-radius:0 var(--r-btn) var(--r-btn) 0;color:var(--ink-600);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{margin:24px auto;border-radius:var(--r-img)}
.article-body figure{margin:26px 0}
.article-body figcaption{font-size:13px;color:var(--ink-400);text-align:center;margin-top:10px}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;
  border:1px solid var(--line);border-radius:var(--r-btn);overflow:hidden;
}
.article-body th,.article-body td{padding:10px 14px;border:1px solid var(--line);text-align:left}
.article-body thead th{background:var(--brand-100);color:var(--ink-900);font-weight:500}
.article-body tbody tr:nth-child(even){background:var(--paper-2)}
.article-body code{
  background:var(--paper-2);padding:2px 6px;border-radius:var(--r-tag);
  font-size:.92em;color:var(--accent-700);font-family:ui-monospace,Consolas,monospace;
}
.article-body pre{
  background:var(--brand-700);color:#F2EDE3;padding:18px 20px;border-radius:var(--r-img);
  overflow-x:auto;line-height:1.7;font-size:14px;margin:24px 0;
}
.article-body pre code{background:none;color:inherit;padding:0}
.article-body hr{border:none;border-top:1px solid var(--line);margin:36px 0}
.article-body a{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
/* 目录 */
.article-aside{position:relative}
.toc{position:sticky;top:104px;border-left:1px solid var(--line);padding-left:18px}
.toc h2{font-family:var(--font-sans);font-size:12.5px;letter-spacing:.08em;color:var(--ink-400);font-weight:500;margin-bottom:12px}
.toc ul{list-style:none}
.toc li{margin-bottom:8px}
.toc a{display:block;font-size:14px;color:var(--ink-600);line-height:1.6}
.toc a:hover{color:var(--brand-600)}
.toc a.is-active{color:var(--brand-700);font-weight:500}
/* 空态 */
.empty-state{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:48px 32px;text-align:center;
}
.empty-state h2{font-size:22px;margin-bottom:12px}
.empty-state p{margin-bottom:22px}
/* 文章尾部 */
.article-foot{padding:0 0 88px}
.foot-inner{max-width:780px;margin:0 auto}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.divider{height:1px;background:var(--line);margin:28px 0 36px}
.related-title{font-size:20px;margin-bottom:20px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{
  display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;
  transition:box-shadow .3s ease,transform .3s ease;
}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.card-media{aspect-ratio:16/10;overflow:hidden;background:var(--paper-2)}
.card-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s ease}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:17px;line-height:1.5;margin-bottom:8px}
.card-body p{font-size:14.5px;line-height:1.75;color:var(--ink-600);margin-bottom:14px}
.card-link{margin-top:auto;font-size:14.5px;font-weight:500;display:inline-flex;align-items:center;gap:6px}
.card-link .arrow{transition:transform .26s ease}
.card-link:hover .arrow{transform:translateX(4px)}
.foot-actions{margin-top:34px;display:flex;flex-wrap:wrap;gap:12px}
/* 浮动 CTA */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;display:flex;flex-direction:column;align-items:flex-end;gap:12px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .4s ease,transform .4s ease,visibility .4s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta.is-docked{transform:translateY(-12px)}
.float-main{height:56px;border-radius:var(--r-pill);padding:0 26px;box-shadow:var(--sh-2)}
.to-top{
  width:46px;height:46px;border-radius:50%;background:var(--white);color:var(--brand-700);
  border:1px solid var(--line);box-shadow:var(--sh-1);cursor:pointer;display:flex;align-items:center;justify-content:center;
}
.to-top:hover{background:var(--brand-100);transform:translateY(-1px)}
.to-top:active{transform:translateY(1px);box-shadow:none}
/* 页脚 */
.site-footer{background:var(--paper-2);border-top:1px solid var(--line);padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:48px}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{font-size:14.5px;line-height:1.8;max-width:320px;margin-bottom:0}
.footer-col h3{font-family:var(--font-sans);font-size:15px;color:var(--ink-900);margin-bottom:14px;font-weight:500}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px;font-size:14.5px}
.footer-col a{color:var(--ink-600)}
.footer-col a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.footer-col .muted{color:var(--ink-400);font-size:13.5px}
.qr-box{
  width:96px;height:96px;border-radius:var(--r-btn);border:1px dashed var(--line);background:var(--white);
  display:flex;align-items:center;justify-content:center;text-align:center;font-size:12px;color:var(--ink-400);
  padding:8px;line-height:1.5;margin-top:14px;
}
.footer-bar{border-top:1px solid var(--line);padding:18px 0;font-size:13px;color:var(--ink-400)}
.footer-bar .container{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}
.footer-bar a{color:var(--ink-400)}
.footer-bar a:hover{color:var(--brand-600)}
/* 动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}
/* 响应式 */
@media (max-width:1200px){
  .article-layout{grid-template-columns:minmax(0,780px);gap:0}
  .article-aside{display:none}
}
@media (max-width:1024px){
  .container{padding:0 20px}
  .nav-links{gap:18px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .nav-links,.nav-actions{display:none}
  .nav-toggle{display:inline-flex}
  .nav-wrap{justify-content:space-between}
}
@media (max-width:768px){
  :root{--nav-h:64px}
  body{font-size:16px;padding-bottom:76px}
  .container{padding:0 16px}
  .article-hero{padding:40px 0 32px}
  .article-layout{padding:36px 0 48px}
  .breadcrumb .current{max-width:45%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
  .related-grid{grid-template-columns:1fr}
  .float-cta{
    left:0;right:0;bottom:0;gap:10px;flex-direction:row;align-items:center;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    background:rgba(250,247,241,.96);border-top:1px solid var(--line);backdrop-filter:blur(10px);
  }
  .float-cta.is-docked{transform:translateY(0)}
  .float-main{flex:1;width:100%;height:52px}
  .to-top{display:none}
  .foot-actions .btn{width:100%}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .article-hero h1{font-size:25px}
  .article-body h2{font-size:20px}
}

/* roulang page: category1 */
:root{
  --brand-700:#1E4D42;
  --brand-600:#2A6A5A;
  --brand-100:#DCE9E3;
  --accent-600:#A85B2B;
  --accent-700:#8E4A22;
  --accent-100:#F6E7DA;
  --ink-900:#14201C;
  --ink-600:#4A5A54;
  --ink-400:#8A968F;
  --line:#E2DCD0;
  --paper:#FAF7F1;
  --paper-2:#F2EDE3;
  --white:#FFFFFF;
  --danger:#B3453B;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --r-tag:6px;
  --sh-1:0 1px 2px rgba(20,32,28,.05), 0 8px 20px -14px rgba(20,32,28,.22);
  --sh-2:0 2px 6px rgba(20,32,28,.06), 0 20px 40px -22px rgba(20,32,28,.28);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --container:1200px;
  --nav-h:74px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.9;
  color:var(--ink-600);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease, background-color .2s ease, border-color .2s ease}
a:hover{color:var(--brand-700)}
ul,ol{list-style:none}
h1,h2,h3,h4{
  font-family:var(--serif);
  color:var(--ink-900);
  font-weight:600;
  letter-spacing:.01em;
}
h1{font-size:clamp(28px,4.4vw,46px);line-height:1.24}
h2{font-size:clamp(22px,2.8vw,34px);line-height:1.32}
h3{font-size:clamp(18px,1.8vw,22px);line-height:1.45}
p{max-width:780px}
button,input,textarea,select{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--accent-600);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--alt{background:var(--paper-2)}
.section--tight{padding:72px 0}
.num{font-variant-numeric:tabular-nums}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease, box-shadow .2s ease, background-color .2s ease, color .2s ease, border-color .2s ease;
}
.btn-primary{background:var(--accent-600);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--accent-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-outline{border-color:var(--line);background:var(--white);color:var(--ink-900)}
.btn-outline:hover{border-color:var(--accent-600);background:var(--accent-100);color:var(--accent-700);transform:translateY(-1px)}
.btn-outline:active{transform:translateY(1px)}
.btn-text{color:var(--brand-600);padding:0 4px;height:auto}
.btn-text:hover{color:var(--brand-700);text-decoration:underline;text-underline-offset:3px}
.btn-sm{height:40px;padding:0 18px;font-size:14.5px}
.btn-lg{height:52px;padding:0 30px;font-size:16px}
.btn-on-dark{background:#fff;color:var(--brand-700)}
.btn-on-dark:hover{background:var(--accent-100);color:var(--accent-700);transform:translateY(-1px)}
.btn-ghost-dark{border-color:rgba(255,255,255,.55);color:#fff;background:transparent}
.btn-ghost-dark:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.btn:focus-visible{outline:2px solid var(--accent-600);outline-offset:2px}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(250,247,241,.9);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease, box-shadow .25s ease, height .25s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 20px -18px rgba(20,32,28,.5)}
.nav-wrap{display:flex;align-items:center;gap:28px;height:var(--nav-h);transition:height .25s ease}
.site-header.is-scrolled .nav-wrap{height:64px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:28px;height:28px;border-radius:8px;
  background:var(--brand-700);color:#fff;
  font-family:var(--serif);font-size:16px;
  display:flex;align-items:center;justify-content:center;
}
.brand-text{font-family:var(--serif);font-size:20px;color:var(--ink-900);letter-spacing:.02em}
.nav-links{display:flex;align-items:center;gap:24px;margin-left:auto}
.nav-links a{
  position:relative;font-size:15px;color:var(--ink-600);
  padding:6px 0;white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--accent-600);transition:width .28s ease;
}
.nav-links a:hover{color:var(--ink-900)}
.nav-links a:hover::after{width:100%}
.nav-links a.is-active{color:var(--brand-700);font-weight:500}
.nav-links a.is-active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);
  background:var(--white);border-radius:var(--r-btn);cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-900);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.drawer{
  position:fixed;inset:0;z-index:90;background:var(--paper);
  display:flex;flex-direction:column;padding:20px 24px 0;
  transform:translateX(100%);transition:transform .3s ease;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:56px}
.drawer-close{width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);background:var(--white);font-size:20px;color:var(--ink-900);cursor:pointer}
.drawer-nav{display:flex;flex-direction:column;margin-top:12px}
.drawer-nav a{
  height:52px;display:flex;align-items:center;
  font-size:16.5px;color:var(--ink-900);border-bottom:1px solid var(--line);
}
.drawer-foot{margin-top:auto;padding:16px 0 28px}
.drawer-foot .btn{width:100%}

/* ---------- Hero ---------- */
.cat-hero{
  position:relative;min-height:320px;display:flex;align-items:center;
  background-image:linear-gradient(100deg, rgba(20,32,28,.82) 0%, rgba(30,77,66,.68) 46%, rgba(250,247,241,.34) 100%), url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  padding:64px 0;
}
.cat-hero .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.78);margin-bottom:18px}
.crumb a{color:rgba(255,255,255,.86)}
.crumb a:hover{color:#fff}
.crumb span.sep{opacity:.6}
.crumb .current{color:#fff}
.cat-hero h1{color:#fff;max-width:820px}
.cat-hero .hero-sub{
  margin-top:16px;font-size:clamp(16px,1.6vw,19px);line-height:1.75;
  color:rgba(255,255,255,.9);max-width:640px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.hero-tags span{
  font-size:12.5px;letter-spacing:.08em;padding:7px 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.28);
}
.cloud-rule{height:1px;background:linear-gradient(90deg,transparent,rgba(30,77,66,.18),transparent)}

/* ---------- 分栏布局 ---------- */
.cat-layout{
  display:grid;grid-template-columns:240px 1fr;gap:56px;
  align-items:start;padding:72px 0 96px;
}
.cat-side{position:sticky;top:96px}
.cat-side h2{
  font-size:14px;font-family:var(--sans);font-weight:600;color:var(--ink-400);
  letter-spacing:.1em;margin-bottom:14px;
}
.cat-side ol{border-left:1px solid var(--line)}
.cat-side li a{
  display:block;padding:9px 0 9px 16px;font-size:15px;color:var(--ink-600);
  border-left:2px solid transparent;margin-left:-1px;transition:all .2s ease;
}
.cat-side li a:hover,.cat-side li a.is-active{
  color:var(--brand-700);border-left-color:var(--accent-600);background:var(--paper-2);
}
.side-note{
  margin-top:24px;padding:18px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--white);box-shadow:var(--sh-1);
}
.side-note p{font-size:13.5px;line-height:1.8;color:var(--ink-600);margin-bottom:12px}
.side-note .btn{width:100%}

.cat-main{min-width:0}
.block{margin-bottom:72px}
.block:last-child{margin-bottom:0}
.block-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:22px}
.block-head .seal{
  flex-shrink:0;width:10px;height:10px;border-radius:2px;background:var(--accent-600);
  margin-top:12px;
}
.block-head h2{max-width:640px}
.lede{font-size:clamp(16px,1.6vw,19px);line-height:1.75;color:var(--ink-600)}
.cat-main p{margin-bottom:1.1em}
.cat-main p:last-child{margin-bottom:0}

/* 图文组 */
.figure-row{
  display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;
  padding:40px 0;border-top:1px solid var(--line);
}
.figure-row:first-of-type{border-top:0;padding-top:8px}
.figure-row.reverse .figure-text{order:2}
.figure-row.reverse .figure-media{order:1}
.figure-media img{width:100%;aspect-ratio:4/3;object-fit:cover;box-shadow:var(--sh-1)}
.figure-text h3{margin-bottom:12px;font-size:clamp(18px,1.8vw,22px)}
.figure-text p{font-size:16px}
.figure-text .mini{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;
}
.figure-text .mini span{
  font-size:12.5px;letter-spacing:.06em;color:var(--brand-600);
  background:var(--brand-100);border-radius:var(--r-tag);padding:5px 10px;
}

/* 方形序号清单 */
.point-list{border-top:1px solid var(--line)}
.point-list li{
  display:grid;grid-template-columns:56px 1fr;gap:20px;
  padding:24px 0;border-bottom:1px solid var(--line);
}
.point-list .idx{
  width:44px;height:44px;border-radius:10px;background:var(--brand-100);
  color:var(--brand-700);font-family:var(--serif);font-size:19px;
  display:flex;align-items:center;justify-content:center;
}
.point-list h3{font-size:18px;margin-bottom:6px}
.point-list p{font-size:15.5px;line-height:1.8;color:var(--ink-600);max-width:640px}

/* 流程 */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:12px;border-top:1px solid var(--line)}
.flow-step{padding:26px 22px 26px 0;border-right:1px solid var(--line)}
.flow-step:last-child{border-right:0;padding-right:0}
.flow-step .dot{
  width:10px;height:10px;border-radius:50%;background:var(--accent-600);
  position:relative;top:-32px;left:0;margin-bottom:-10px;
}
.flow-step .step-no{
  font-family:var(--serif);font-size:14px;color:var(--ink-400);letter-spacing:.08em;
}
.flow-step h3{font-size:18px;margin:8px 0 8px}
.flow-step p{font-size:15px;line-height:1.8}

/* 对比条 */
.compare{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  margin-top:8px;
}
.compare-item{padding:26px 22px;border-right:1px solid var(--line)}
.compare-item:last-child{border-right:0}
.compare-item .label{font-size:13px;color:var(--ink-400);letter-spacing:.06em}
.compare-item .value{
  font-family:var(--serif);font-size:clamp(20px,2vw,26px);color:var(--ink-900);
  margin:8px 0 6px;font-variant-numeric:tabular-nums;
}
.compare-item p{font-size:14.5px;line-height:1.75}

/* 证据 */
.proof-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.proof-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-1);transition:box-shadow .3s ease, transform .3s ease;
}
.proof-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.proof-card .quote{font-family:var(--serif);font-size:18px;line-height:1.7;color:var(--ink-900);margin-bottom:16px}
.proof-card .stat{
  font-family:var(--serif);font-size:30px;color:var(--brand-700);
  font-variant-numeric:tabular-nums;margin-bottom:6px;
}
.proof-card .byline{font-size:13.5px;color:var(--ink-400)}

/* 投入档位 */
.tier-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:8px}
.tier{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 22px;box-shadow:var(--sh-1);transition:transform .3s ease, box-shadow .3s ease;
  display:flex;flex-direction:column;
}
.tier:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.tier h3{font-size:19px;margin-bottom:6px}
.tier .price{
  font-family:var(--serif);font-size:26px;color:var(--ink-900);
  font-variant-numeric:tabular-nums;margin:10px 0 4px;
}
.tier .price small{font-size:13px;font-family:var(--sans);color:var(--ink-400);margin-left:6px}
.tier ul{margin:16px 0 22px;display:flex;flex-direction:column;gap:10px}
.tier li{position:relative;padding-left:22px;font-size:15px;line-height:1.75}
.tier li::before{
  content:"";position:absolute;left:0;top:9px;width:9px;height:9px;
  border-radius:2px;background:var(--brand-600);
}
.tier .btn{margin-top:auto;width:100%}

/* FAQ */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;background:none;border:0;cursor:pointer;text-align:left;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 0;font-size:17px;font-weight:500;color:var(--ink-900);
}
.faq-q .plus{
  flex-shrink:0;width:22px;height:22px;position:relative;transition:transform .3s ease;
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--accent-600);
  transform:translate(-50%,-50%);
}
.faq-q .plus::before{width:14px;height:2px}
.faq-q .plus::after{width:2px;height:14px}
.faq-item.is-open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{font-size:15px;line-height:1.85;color:var(--ink-600);padding:0 40px 22px 0}

/* 相关入口 */
.related{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.related-card{
  display:block;background:var(--white);border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-1);
  transition:transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-100)}
.related-card .tag{
  display:inline-block;font-size:12.5px;letter-spacing:.08em;color:var(--brand-600);
  background:var(--brand-100);border-radius:var(--r-tag);padding:4px 10px;margin-bottom:12px;
}
.related-card h3{font-size:17px;margin-bottom:6px}
.related-card p{font-size:14.5px;line-height:1.75;color:var(--ink-600)}

/* CTA 通栏 */
.cta-band{
  background-color:var(--brand-700);
  background-image:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,0)),
    repeating-linear-gradient(115deg, rgba(255,255,255,.05) 0 1px, transparent 1px 26px);
  padding:88px 0;text-align:center;
}
.cta-band h2{color:#fff;max-width:760px;margin:0 auto 16px}
.cta-band p{color:rgba(255,255,255,.86);max-width:620px;margin:0 auto 32px;font-size:17px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* 页脚 */
.site-footer{background:var(--paper-2);border-top:1px solid var(--line);padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-text{font-size:19px}
.site-footer p{font-size:14.5px;line-height:1.8;color:var(--ink-600)}
.footer-quote{
  margin-top:20px;padding:16px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--white);box-shadow:var(--sh-1);
}
.footer-quote strong{display:block;font-size:14.5px;color:var(--ink-900);font-weight:600}
.footer-quote span{font-size:13px;color:var(--ink-400)}
.footer-col h3{
  font-family:var(--sans);font-size:14px;font-weight:600;color:var(--ink-900);
  letter-spacing:.08em;margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col li a,.footer-col li span{font-size:14.5px;color:var(--ink-600)}
.footer-col li a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;display:flex;flex-wrap:wrap;
  gap:12px;justify-content:space-between;align-items:center;
}
.footer-bottom span{font-size:13.5px;color:var(--ink-400)}
.footer-bottom a{font-size:13.5px;color:var(--ink-400)}
.footer-bottom a:hover{color:var(--brand-600)}

/* 浮动 CTA */
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:70;
  display:flex;align-items:center;gap:12px;
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .4s ease, transform .4s ease;
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta .pill{
  height:56px;display:inline-flex;align-items:center;gap:10px;padding:0 26px;
  background:var(--accent-600);color:#fff;border-radius:var(--r-pill);
  font-size:15.5px;box-shadow:var(--sh-2);
}
.float-cta .pill:hover{background:var(--accent-700);color:#fff;transform:translateY(-1px)}
.to-top{
  width:48px;height:48px;border-radius:50%;background:var(--white);color:var(--ink-900);
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-1);cursor:pointer;font-size:16px;
}
.to-top:hover{border-color:var(--accent-600);color:var(--accent-700);transform:translateY(-1px)}

/* 进场动画 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease, transform .5s ease}
.reveal.is-visible{opacity:1;transform:translateY(0)}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .container{padding:0 20px}
  .section{padding:64px 0}
  .nav-links{gap:16px}
  .nav-links a{font-size:14px}
  .cat-layout{grid-template-columns:1fr;gap:32px;padding:56px 0 72px}
  .cat-side{position:static}
  .cat-side ol{display:flex;flex-wrap:wrap;gap:8px;border-left:0}
  .cat-side li a{
    border:1px solid var(--line);border-radius:var(--r-pill);padding:8px 14px;
    background:var(--white);font-size:14px;margin-left:0;
  }
  .cat-side li a:hover,.cat-side li a.is-active{border-color:var(--accent-600);background:var(--accent-100)}
  .side-note{margin-top:16px}
  .compare{grid-template-columns:repeat(2,1fr)}
  .compare-item:nth-child(2){border-right:0}
  .compare-item:nth-child(1),.compare-item:nth-child(2){border-bottom:1px solid var(--line)}
  .related{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .nav-links,.nav-actions{display:none}
  .nav-toggle{display:flex;margin-left:auto}
}
@media (max-width:768px){
  body{font-size:16px}
  .section{padding:52px 0}
  .cat-hero{min-height:280px;padding:48px 0}
  .figure-row{grid-template-columns:1fr;gap:22px;padding:32px 0}
  .figure-row.reverse .figure-text{order:1}
  .figure-row.reverse .figure-media{order:2}
  .flow{grid-template-columns:1fr}
  .flow-step{border-right:0;border-bottom:1px solid var(--line);padding:22px 0}
  .flow-step:last-child{border-bottom:0}
  .flow-step .dot{display:none}
  .tier-list{grid-template-columns:1fr}
  .proof-grid{grid-template-columns:1fr}
  .related{grid-template-columns:1fr}
  .cta-band{padding:64px 0}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .float-cta{
    left:0;right:0;bottom:0;gap:0;padding:0;
    flex-direction:row;justify-content:center;
  }
  .float-cta .pill{
    border-radius:0;width:100%;justify-content:center;height:56px;
    padding:0 16px calc(0px + env(safe-area-inset-bottom, 0px));
  }
  .float-cta .to-top{display:none}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .hero-tags span{font-size:12px;padding:6px 11px}
  .compare{grid-template-columns:1fr}
  .compare-item{border-right:0;border-bottom:1px solid var(--line)}
  .compare-item:last-child{border-bottom:0}
  .point-list li{grid-template-columns:44px 1fr;gap:14px}
  .point-list .idx{width:38px;height:38px;font-size:17px}
}

/* roulang page: category2 */
:root{
  --brand-700:#1E4D42;
  --brand-600:#2A6A5A;
  --brand-100:#DCE9E3;
  --accent-600:#A85B2B;
  --accent-700:#8E4A22;
  --accent-100:#F6E7DA;
  --ink-900:#14201C;
  --ink-600:#4A5A54;
  --ink-400:#8A968F;
  --line:#E2DCD0;
  --paper:#FAF7F1;
  --paper-2:#F2EDE3;
  --white:#FFFFFF;
  --danger:#B3453B;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --radius-pill:999px;
  --radius-tag:6px;
  --sh-1:0 1px 2px rgba(20,32,28,.05),0 8px 20px -14px rgba(20,32,28,.22);
  --sh-2:0 2px 6px rgba(20,32,28,.06),0 20px 40px -22px rgba(20,32,28,.28);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --container:1200px;
  --sec-y:96px;
  --nav-h:74px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-600);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent-600);}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--ink-900);margin:0;font-weight:600;}
h1{font-size:clamp(28px,4.4vw,46px);line-height:1.24;letter-spacing:.01em;}
h2{font-size:clamp(22px,2.8vw,34px);line-height:1.32;}
h3{font-size:clamp(18px,1.8vw,22px);line-height:1.45;}
p{margin:0 0 1.1em;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent-600);outline-offset:2px;border-radius:4px;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;width:100%;}
.nums{font-variant-numeric:tabular-nums;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(250,247,241,.94);
  border-bottom:1px solid transparent;
  transition:height .25s ease,background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-stuck{
  border-bottom-color:var(--line);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.nav-bar{
  display:flex;align-items:center;gap:24px;
  height:var(--nav-h);
  transition:height .25s ease;
}
.site-header.is-stuck .nav-bar{height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand .mark{
  width:28px;height:28px;border-radius:8px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--brand-600),var(--brand-700));
  position:relative;
}
.brand .mark::after{
  content:"";position:absolute;left:7px;right:7px;bottom:8px;height:1.5px;
  background:rgba(255,255,255,.75);border-radius:2px;
  box-shadow:0 -5px 0 rgba(255,255,255,.45);
}
.brand .wordmark{
  font-family:var(--font-serif);font-size:19px;font-weight:600;
  color:var(--ink-900);letter-spacing:.02em;white-space:nowrap;
}
.nav-links{
  display:flex;align-items:center;gap:22px;margin-left:auto;
}
.nav-links a{
  position:relative;color:var(--ink-600);font-size:15px;line-height:18px;
  padding:6px 0;white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--accent-600);transition:width .28s ease;
}
.nav-links a:hover{color:var(--ink-900);}
.nav-links a:hover::after{width:100%;}
.nav-links a.active{color:var(--brand-700);font-weight:500;}
.nav-links a.active::after{width:100%;}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:500;line-height:1;
  padding:0 22px;height:44px;border-radius:var(--radius-btn);
  border:1px solid transparent;text-align:center;white-space:nowrap;
  transition:transform .2s ease,background .2s ease,color .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--accent-600);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--accent-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(1px);box-shadow:none;}
.btn-ghost{border-color:var(--line);color:var(--ink-900);background:transparent;}
.btn-ghost:hover{border-color:var(--accent-600);background:var(--accent-100);color:var(--accent-700);}
.btn-ghost:active{transform:translateY(1px);}
.btn-light{background:#fff;color:var(--brand-700);box-shadow:var(--sh-1);}
.btn-light:hover{background:var(--accent-100);color:var(--accent-700);transform:translateY(-1px);}
.btn-outline-light{border-color:rgba(255,255,255,.55);color:#fff;background:transparent;}
.btn-outline-light:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff;}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none!important;box-shadow:none;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:1.8px;background:var(--ink-900);border-radius:2px;transition:transform .25s ease,opacity .25s ease;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.drawer{
  display:none;position:fixed;inset:var(--nav-h) 0 0 0;z-index:79;
  background:var(--paper);padding:12px 24px 0;flex-direction:column;
  border-top:1px solid var(--line);
}
.drawer.is-open{display:flex;}
.drawer a{
  display:flex;align-items:center;height:52px;font-size:17px;color:var(--ink-900);
  border-bottom:1px solid var(--line);
}
.drawer a.active{color:var(--brand-700);font-weight:500;}
.drawer-foot{margin-top:auto;padding:16px 0 24px;}
.drawer-foot .btn{width:100%;height:52px;font-size:16px;}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;min-height:380px;display:flex;align-items:center;
  justify-content:center;text-align:center;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(30,77,66,.72),rgba(250,247,241,.35) 78%,var(--paper)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  padding:56px 0 64px;
}
.page-hero .inner{max-width:840px;margin:0 auto;padding:0 24px;}
.crumbs{font-size:13px;color:rgba(255,255,255,.86);display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:18px;}
.crumbs a{color:rgba(255,255,255,.9);}
.crumbs a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.crumbs .sep{opacity:.6;}
.crumbs .current{color:#fff;font-weight:500;}
.page-hero h1{color:#fff;text-shadow:0 2px 18px rgba(20,32,28,.32);}
.page-hero .lede{
  margin:18px auto 0;max-width:640px;color:rgba(255,255,255,.94);
  font-size:clamp(16px,1.6vw,19px);line-height:1.75;
  text-shadow:0 1px 12px rgba(20,32,28,.3);
}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:28px;}
.hero-tags{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:26px;}
.hero-tags span{
  font-size:12.5px;letter-spacing:.06em;color:#fff;
  border:1px solid rgba(255,255,255,.48);border-radius:var(--radius-pill);
  padding:6px 14px;background:rgba(30,77,66,.28);
}
.ridge{display:block;width:100%;height:16px;margin-top:0;opacity:.16;}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sec-y) 0;}
.section.alt{background:var(--paper-2);}
.section-head{max-width:780px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.08em;color:var(--brand-600);
  background:var(--brand-100);border-radius:var(--radius-tag);
  padding:5px 10px;margin-bottom:16px;
}
.eyebrow::before{content:"";width:6px;height:6px;background:var(--accent-600);border-radius:1px;}
.section-head p{margin-top:14px;font-size:16.5px;color:var(--ink-600);}
.lead-serif{font-family:var(--font-serif);color:var(--ink-900);font-size:clamp(19px,2vw,23px);line-height:1.6;}

/* 两栏导语 */
.intro-grid{display:grid;grid-template-columns:minmax(280px,5fr) minmax(320px,7fr);gap:56px;align-items:start;}
.intro-grid .side{border-left:1px solid var(--line);padding-left:28px;}
.intro-grid .side p{margin-bottom:.9em;}
.intro-grid .side p:last-child{margin-bottom:0;}
.intro-stat{display:flex;gap:36px;flex-wrap:wrap;margin-top:30px;}
.intro-stat div{min-width:120px;}
.intro-stat .num{font-family:var(--font-serif);font-size:28px;color:var(--brand-700);line-height:1.2;}
.intro-stat .cap{font-size:13px;color:var(--ink-400);}

/* ---------- 卡片矩阵 ---------- */
.matrix{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.m-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--sh-1);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .28s ease,box-shadow .28s ease;
}
.m-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.m-card .thumb{position:relative;overflow:hidden;border-radius:0;}
.m-card .thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s ease;}
.m-card:hover .thumb img{transform:scale(1.04);}
.m-card .pill{
  position:absolute;left:14px;top:14px;z-index:2;
  background:var(--paper);color:var(--brand-600);
  font-size:12.5px;letter-spacing:.04em;border-radius:var(--radius-tag);
  padding:5px 10px;box-shadow:var(--sh-1);
}
.m-card .body{padding:24px 24px 26px;display:flex;flex-direction:column;gap:10px;flex:1;}
.m-card .body h3{font-size:19px;}
.m-card .body p{margin:0;font-size:15px;line-height:1.8;color:var(--ink-600);}
.m-card .more{
  margin-top:auto;padding-top:14px;font-size:14.5px;color:var(--brand-600);
  display:inline-flex;align-items:center;gap:6px;font-weight:500;
}
.m-card .more:hover{color:var(--accent-600);}
.m-card .more .arw{transition:transform .25s ease;}
.m-card .more:hover .arw{transform:translateX(4px);}
.m-card.wide{grid-column:span 2;flex-direction:row;}
.m-card.wide .thumb{flex:0 0 46%;min-height:290px;}
.m-card.wide .body{padding:34px 36px;justify-content:center;}
.m-card.wide .body h3{font-size:clamp(20px,2.2vw,26px);}
.m-card.wide .body p{font-size:15.5px;}
.m-card.tall .thumb{aspect-ratio:16/10;}

/* 对比条 */
.compare{
  margin-top:56px;background:var(--white);border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--sh-1);overflow:hidden;
}
.compare .head{
  padding:20px 28px;border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.compare .head h3{font-size:17px;}
.compare .head span{font-size:13px;color:var(--ink-400);}
.compare .row{display:grid;grid-template-columns:repeat(4,1fr);}
.compare .cell{padding:26px 24px;border-left:1px solid var(--line);}
.compare .cell:first-child{border-left:0;}
.compare .cell .k{font-size:13px;color:var(--ink-400);margin-bottom:8px;}
.compare .cell .v{font-family:var(--font-serif);font-size:20px;color:var(--ink-900);line-height:1.4;}
.compare .cell .d{font-size:13.5px;color:var(--ink-600);margin-top:6px;line-height:1.7;}

/* 关键要点 */
.points{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:8px;}
.point{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--sh-1);padding:26px 24px;transition:transform .28s ease,box-shadow .28s ease;}
.point:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.point .idx{
  width:34px;height:34px;border-radius:8px;background:var(--brand-100);color:var(--brand-700);
  font-family:var(--font-serif);font-size:17px;display:flex;align-items:center;justify-content:center;
  margin-bottom:14px;
}
.point h3{font-size:17.5px;margin-bottom:8px;}
.point p{margin:0;font-size:14.8px;line-height:1.8;color:var(--ink-600);}

/* 流程 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:8px;}
.step{position:relative;padding:0 22px;border-left:1px solid var(--line);}
.step:first-child{border-left:0;padding-left:0;}
.step .no{font-family:var(--font-serif);font-size:14px;color:var(--accent-600);letter-spacing:.08em;}
.step h3{font-size:17.5px;margin:8px 0 8px;}
.step p{margin:0;font-size:14.8px;line-height:1.8;color:var(--ink-600);}
.step .dot{
  position:absolute;left:-5px;top:12px;width:9px;height:9px;border-radius:50%;
  background:var(--brand-600);border:2px solid var(--paper);
}
.step:first-child .dot{left:0;}

/* FAQ */
.faq-wrap{display:grid;grid-template-columns:minmax(260px,4fr) minmax(320px,8fr);gap:56px;align-items:start;}
.faq-aside{position:sticky;top:110px;}
.faq-aside p{margin-top:14px;font-size:15.5px;}
.faq-aside .btn{margin-top:22px;}
.accordion{border-top:1px solid var(--line);}
.acc-item{border-bottom:1px solid var(--line);}
.acc-q{
  width:100%;background:none;border:0;padding:22px 0;display:flex;align-items:flex-start;
  gap:16px;text-align:left;font-size:17px;font-weight:500;color:var(--ink-900);
  font-family:var(--font-sans);line-height:1.6;
}
.acc-q:hover{color:var(--brand-700);}
.acc-q .sign{
  margin-left:auto;flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform .3s ease;
}
.acc-q .sign::before,.acc-q .sign::after{
  content:"";position:absolute;background:var(--accent-600);border-radius:2px;
}
.acc-q .sign::before{left:0;right:0;top:10px;height:1.6px;}
.acc-q .sign::after{top:0;bottom:0;left:10px;width:1.6px;transition:opacity .3s ease;}
.acc-item.open .acc-q .sign{transform:rotate(45deg);}
.acc-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.acc-a .inner{padding:0 42px 24px 0;font-size:15px;line-height:1.85;color:var(--ink-600);}

/* CTA */
.cta-band{
  background:var(--brand-700);color:#fff;position:relative;overflow:hidden;
  padding:88px 0;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;opacity:.16;
}
.cta-band .inner{position:relative;z-index:2;max-width:820px;margin:0 auto;text-align:center;padding:0 24px;}
.cta-band h2{color:#fff;}
.cta-band p{color:rgba(255,255,255,.86);margin-top:16px;font-size:16.5px;}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:30px;}
.cta-meta{
  margin-top:28px;font-size:13.5px;color:rgba(255,255,255,.72);
  display:flex;gap:20px;justify-content:center;flex-wrap:wrap;
}

/* 相关入口 */
.entries{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.entry{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px;box-shadow:var(--sh-1);transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
  display:flex;flex-direction:column;gap:8px;
}
.entry:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-100);}
.entry .tag{font-size:12.5px;letter-spacing:.06em;color:var(--brand-600);}
.entry strong{font-family:var(--font-serif);font-size:17px;color:var(--ink-900);font-weight:600;}
.entry span{font-size:14px;color:var(--ink-600);line-height:1.7;}
.entry em{font-style:normal;font-size:14px;color:var(--brand-600);margin-top:auto;}

/* 联系表单 */
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:8px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:span 2;}
.field label{font-size:13px;color:var(--ink-600);letter-spacing:.02em;}
.field input,.field textarea,.field select{
  height:46px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:#fff;padding:0 14px;font-size:15px;color:var(--ink-900);font-family:inherit;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:120px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px var(--brand-100);
}
.field .hint{font-size:12.5px;color:var(--ink-400);}
.field .err{font-size:13px;color:var(--danger);display:none;}
.field.has-error input,.field.has-error textarea{border-color:var(--danger);}
.field.has-error .err{display:block;}
.form-note{
  margin-top:18px;background:var(--brand-100);color:var(--brand-700);
  border-radius:var(--radius-btn);padding:12px 16px;font-size:14px;
}
.form-box{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--sh-1);padding:32px;
}
.contact-grid{display:grid;grid-template-columns:minmax(300px,5fr) minmax(320px,7fr);gap:56px;align-items:start;}
.contact-info dl{margin:0;display:grid;gap:18px;}
.contact-info dt{font-size:13px;color:var(--ink-400);}
.contact-info dd{margin:4px 0 0;font-size:16px;color:var(--ink-900);}

/* 页脚 */
.site-footer{
  background:var(--paper-2);border-top:1px solid var(--line);
  padding:64px 0 0;margin-top:0;
}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.foot-brand .wordmark{
  font-family:var(--font-serif);font-size:20px;color:var(--ink-900);font-weight:600;
  display:flex;align-items:center;gap:10px;
}
.foot-brand .mark{
  width:26px;height:26px;border-radius:7px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--brand-600),var(--brand-700));position:relative;
}
.foot-brand .mark::after{
  content:"";position:absolute;left:6px;right:6px;bottom:7px;height:1.5px;
  background:rgba(255,255,255,.75);border-radius:2px;box-shadow:0 -4px 0 rgba(255,255,255,.45);
}
.foot-brand p{margin-top:14px;font-size:14.5px;color:var(--ink-600);max-width:320px;line-height:1.8;}
.foot-col h4{font-family:var(--font-sans);font-size:14px;letter-spacing:.06em;color:var(--ink-900);margin-bottom:16px;font-weight:600;}
.foot-col ul{display:grid;gap:10px;}
.foot-col a{color:var(--ink-600);font-size:14.5px;}
.foot-col a:hover{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px;}
.qr-slot{
  width:104px;height:104px;border:1px dashed var(--line);border-radius:var(--radius-img);
  background:#fff;display:flex;align-items:center;justify-content:center;
  font-size:12.5px;color:var(--ink-400);text-align:center;padding:8px;line-height:1.6;
}
.foot-bottom{
  margin-top:48px;border-top:1px solid var(--line);padding:22px 0;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-400);
}
.foot-bottom a{color:var(--ink-400);}
.foot-bottom a:hover{color:var(--brand-600);}
.foot-links{display:flex;gap:18px;flex-wrap:wrap;}

/* 浮动 CTA */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:flex;flex-direction:column;align-items:flex-end;gap:12px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .4s ease,transform .4s ease,visibility .4s ease;
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta .main{
  display:inline-flex;align-items:center;gap:8px;height:56px;padding:0 26px;
  border-radius:var(--radius-pill);background:var(--accent-600);color:#fff;
  font-size:15.5px;font-weight:500;box-shadow:var(--sh-2);
}
.float-cta .main:hover{background:var(--accent-700);color:#fff;transform:translateY(-1px);}
.to-top{
  width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--line);
  box-shadow:var(--sh-1);display:flex;align-items:center;justify-content:center;
  color:var(--ink-900);font-size:16px;
}
.to-top:hover{border-color:var(--brand-600);color:var(--brand-700);}

/* 进场动画 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease;}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* 响应式 */
@media (max-width:1024px){
  :root{--sec-y:64px;}
  .nav-links{gap:16px;}
  .nav-links a{font-size:14px;}
  .intro-grid{grid-template-columns:1fr;gap:32px;}
  .intro-grid .side{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:24px;}
  .points{grid-template-columns:repeat(2,1fr);}
  .entries{grid-template-columns:repeat(2,1fr);}
  .compare .row{grid-template-columns:repeat(2,1fr);}
  .compare .cell:nth-child(3){border-left:0;}
  .compare .cell{border-top:1px solid var(--line);}
  .compare .cell:nth-child(1),.compare .cell:nth-child(2){border-top:0;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .steps{grid-template-columns:repeat(2,1fr);row-gap:32px;}
  .step:nth-child(3){border-left:0;padding-left:0;}
  .step:nth-child(3) .dot{left:0;}
  .faq-wrap{grid-template-columns:1fr;gap:32px;}
  .faq-aside{position:static;}
  .contact-grid{grid-template-columns:1fr;gap:36px;}
}
@media (max-width:860px){
  .nav-links,.nav-actions .btn-ghost{display:none;}
  .nav-toggle{display:flex;}
  .page-hero{min-height:320px;padding:44px 0 52px;}
  .m-card.wide{grid-column:span 2;flex-direction:column;}
  .m-card.wide .thumb{flex:none;min-height:0;aspect-ratio:16/10;}
  .m-card.wide .body{padding:26px 24px;}
}
@media (max-width:768px){
  :root{--sec-y:52px;}
  body{font-size:16px;}
  .matrix{grid-template-columns:1fr;}
  .m-card.wide{grid-column:span 1;}
  .points{grid-template-columns:1fr;}
  .entries{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;row-gap:26px;}
  .step{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:22px;}
  .step:first-child{border-top:0;padding-top:0;}
  .step .dot{display:none;}
  .compare .row{grid-template-columns:1fr;}
  .compare .cell{border-left:0;}
  .foot-grid{grid-template-columns:1fr;gap:28px;}
  .form-grid{grid-template-columns:1fr;}
  .field.full{grid-column:span 1;}
  .form-box{padding:24px;}
  .cta-band{padding:64px 0;}
  .float-cta{left:16px;right:16px;bottom:0;align-items:stretch;flex-direction:row-reverse;gap:10px;}
  .float-cta .main{flex:1;justify-content:center;height:56px;border-radius:12px;margin-bottom:calc(12px + env(safe-area-inset-bottom));}
  .to-top{width:56px;height:56px;border-radius:12px;margin-bottom:calc(12px + env(safe-area-inset-bottom));}
}
@media (max-width:520px){
  .container{padding:0 18px;}
  .page-hero .inner{padding:0 18px;}
  .hero-actions .btn,.cta-actions .btn{width:100%;}
  .compare .head{padding:16px 18px;}
  .compare .cell{padding:20px 18px;}
  .m-card .body{padding:20px 18px 22px;}
  .m-card.wide .body{padding:22px 18px;}
}