/* roulang page: index */
:root{
  --paper:#F5F2EB;
  --ink:#16161A;
  --ink-2:#3A3A42;
  --muted:#7C7A74;
  --line:#E2DDD2;
  --accent:#C8452A;
  --accent-hover:#A8371F;
  --accent-soft:#FBEAE4;
  --jade:#1F5F52;
  --sand:#EDE6D8;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --sh-1:0 1px 2px rgba(22,22,26,.05),0 8px 24px -12px rgba(22,22,26,.12);
  --sh-2:0 20px 40px -20px rgba(22,22,26,.28);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-serif:"Songti SC","Noto Serif SC","SimSun",Georgia,serif;
  --bs-body-bg:var(--paper);
  --bs-body-color:var(--ink-2);
  --bs-border-color:var(--line);
  --bs-primary:var(--accent);
  --bs-link-color:var(--jade);
  --bs-link-hover-color:var(--accent-hover);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-2);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--jade);text-decoration:none;transition:color .25s ease;}
a:hover{color:var(--accent-hover);}
button{font-family:inherit;}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--ink);font-weight:600;letter-spacing:.01em;line-height:1.15;margin:0;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
::selection{background:var(--accent-soft);color:var(--ink);}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px;}

/* 顶部阅读进度 */
.scroll-progress{
  position:fixed;top:0;left:0;height:2px;width:0;
  background:var(--accent);z-index:4000;transition:width .12s linear;
}

/* 左侧竖向导航 */
.site-shell{display:block;}
.sidebar{
  position:fixed;left:0;top:0;width:232px;height:100vh;
  background:var(--ink);color:#fff;z-index:1200;
  overflow-y:auto;scrollbar-width:none;
}
.sidebar::-webkit-scrollbar{display:none;}
.sidebar-inner{padding:30px 22px 26px;display:flex;flex-direction:column;min-height:100%;}
.brand{display:flex;align-items:center;gap:12px;margin-bottom:34px;color:#fff;}
.brand:hover{color:#fff;}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:12px;
  background:var(--accent);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-serif);font-size:21px;font-weight:600;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-family:var(--font-serif);font-size:20px;letter-spacing:.02em;color:#fff;font-weight:600;}
.brand-text em{font-style:normal;font-size:12px;letter-spacing:.14em;color:rgba(255,255,255,.6);}
.side-label{
  font-size:11px;letter-spacing:.16em;color:rgba(255,255,255,.38);
  text-transform:uppercase;margin:0 0 12px;padding-left:12px;
}
.side-nav-links{display:flex;flex-direction:column;gap:2px;margin-bottom:30px;}
.nav-link{
  position:relative;display:block;color:rgba(255,255,255,.78);
  font-size:15.5px;padding:12px 14px;border-radius:var(--r-sm);
  transition:background .25s ease,color .25s ease;
}
.nav-link::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;background:var(--accent);border-radius:2px;
  transition:height .28s cubic-bezier(.22,.61,.36,1);
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.05);}
.nav-link:hover::before{height:56%;}
.nav-link.active{color:#fff;background:rgba(255,255,255,.07);}
.nav-link.active::before{height:64%;}
.side-sub{display:flex;flex-direction:column;gap:10px;margin-bottom:28px;}
.side-sub a{
  font-size:14px;color:rgba(255,255,255,.62);
  display:flex;align-items:center;gap:8px;padding-left:14px;
  transition:color .25s ease,transform .25s ease;
}
.side-sub a::before{content:"";width:5px;height:5px;border-radius:50%;background:rgba(255,255,255,.3);flex:0 0 5px;}
.side-sub a:hover{color:#fff;transform:translateX(3px);}
.side-sub a:hover::before{background:var(--accent);}
.side-foot{margin-top:auto;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);}
.btn-ghost-sm{
  display:block;text-align:center;border:1.5px solid rgba(255,255,255,.34);
  color:#fff;font-size:13.5px;padding:10px 14px;border-radius:10px;
  transition:background .25s ease,border-color .25s ease,transform .25s ease;
}
.btn-ghost-sm:hover{background:var(--accent);border-color:var(--accent);color:#fff;transform:translateY(-2px);}
.side-foot p{font-size:11.5px;color:rgba(255,255,255,.42);margin:12px 0 0;line-height:1.7;}

/* 主内容区 */
.site-main{margin-left:232px;min-height:100vh;display:flex;flex-direction:column;}
main{flex:1 1 auto;}
.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 24px;}

/* 移动端顶部栏 */
.mobile-bar{
  display:none;position:sticky;top:0;z-index:1300;
  height:60px;background:var(--paper);border-bottom:1px solid var(--line);
  align-items:center;justify-content:space-between;padding:0 18px;
}
.mobile-brand{display:flex;align-items:center;gap:10px;color:var(--ink);}
.mobile-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;font-size:17px;border-radius:9px;}
.mobile-brand span{font-family:var(--font-serif);font-size:16px;font-weight:600;letter-spacing:.02em;}
.mobile-menu-btn{
  width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:10px;
  color:var(--ink);font-size:17px;display:flex;align-items:center;justify-content:center;
}
.mobile-menu-btn:hover{border-color:var(--accent);color:var(--accent);}
.offcanvas.offcanvas-start{background:var(--ink);color:#fff;width:290px;}
.offcanvas-header{border-bottom:1px solid rgba(255,255,255,.12);padding:20px 22px;}
.offcanvas-title{font-family:var(--font-serif);font-size:18px;color:#fff;}
.offcanvas-body{padding:22px;}
.btn-close{filter:invert(1) grayscale(1);opacity:.7;}

/* 倒计时条 */
.countdown-bar{
  position:sticky;top:0;z-index:1100;
  background:var(--ink);color:#fff;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.cd-wrap{
  display:flex;align-items:center;gap:22px;justify-content:space-between;
  padding:12px 24px;flex-wrap:wrap;
}
.cd-left{display:flex;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,.82);}
.cd-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(200,69,42,.18);}
.cd-mid{display:flex;align-items:center;gap:6px;font-variant-numeric:tabular-nums;}
.cd-unit{display:flex;align-items:baseline;gap:3px;}
.cd-unit b{
  display:inline-block;min-width:30px;text-align:center;
  font-size:19px;font-weight:600;color:#fff;font-variant-numeric:tabular-nums;
  background:rgba(255,255,255,.08);border-radius:6px;padding:2px 5px;
}
.cd-unit i{font-style:normal;font-size:11px;color:rgba(255,255,255,.5);}
.cd-btn{
  background:var(--accent);color:#fff;font-size:13px;font-weight:600;
  padding:8px 16px;border-radius:9px;transition:background .25s ease,transform .25s ease;
}
.cd-btn:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px);}

/* 通用按钮 */
.btn-solid{
  display:inline-flex;align-items:center;gap:9px;
  background:var(--ink);color:#fff;font-size:15px;font-weight:600;
  padding:14px 26px;border-radius:10px;border:1.5px solid var(--ink);
  transition:background .25s ease,transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.btn-solid:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-solid:active{transform:translateY(0);}
.btn-accent{
  display:inline-flex;align-items:center;gap:9px;
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;
  padding:14px 26px;border-radius:10px;border:1.5px solid var(--accent);
  transition:background .25s ease,transform .25s ease,box-shadow .25s ease;
}
.btn-accent:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-line{
  display:inline-flex;align-items:center;gap:9px;
  background:transparent;color:var(--ink);font-size:15px;font-weight:600;
  padding:14px 26px;border-radius:10px;border:1.5px solid var(--ink);
  transition:background .25s ease,color .25s ease,transform .25s ease;
}
.btn-line:hover{background:var(--ink);color:#fff;transform:translateY(-2px);}
.btn-line-light{
  display:inline-flex;align-items:center;gap:9px;
  background:transparent;color:#fff;font-size:15px;font-weight:600;
  padding:13px 24px;border-radius:10px;border:1.5px solid rgba(255,255,255,.5);
  transition:background .25s ease,color .25s ease,transform .25s ease;
}
.btn-line-light:hover{background:#fff;color:var(--ink);transform:translateY(-2px);}
.text-link{
  display:inline-flex;align-items:center;gap:7px;
  color:var(--ink);font-size:14.5px;font-weight:600;position:relative;
}
.text-link i{transition:transform .25s ease;font-size:12px;}
.text-link::after{
  content:"";position:absolute;left:0;bottom:-4px;height:1.5px;width:0;
  background:var(--accent);transition:width .3s ease;
}
.text-link:hover{color:var(--accent);}
.text-link:hover i{transform:translateX(4px);}
.text-link:hover::after{width:100%;}

/* 徽章 */
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;letter-spacing:.06em;font-weight:500;
  padding:4px 12px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent-hover);
}
.badge-jade{background:rgba(31,95,82,.1);color:var(--jade);}
.badge-line{background:transparent;border:1px solid var(--line);color:var(--muted);}

/* Hero */
.hero{padding:72px 0 84px;position:relative;}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.06em;color:var(--jade);
  background:rgba(31,95,82,.08);border-radius:999px;padding:5px 14px;margin-bottom:22px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--jade);}
.hero h1{
  font-size:clamp(34px,4.4vw,58px);
  letter-spacing:.01em;margin-bottom:20px;color:var(--ink);
}
.hero h1 .hl-accent{color:var(--accent);}
.hero-sub{font-size:17px;line-height:1.9;color:var(--ink-2);max-width:560px;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:38px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:0;border-top:1px solid var(--line);padding-top:24px;}
.stat{padding-right:34px;margin-right:34px;border-right:1px solid var(--line);}
.stat:last-child{border-right:0;margin-right:0;padding-right:0;}
.stat strong{
  display:block;font-family:var(--font-serif);font-size:30px;color:var(--ink);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.stat span{font-size:13px;color:var(--muted);letter-spacing:.04em;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:16/11;object-fit:cover;
  border-radius:var(--r-lg);box-shadow:var(--sh-2);
}
.hero-visual::before{
  content:"";position:absolute;inset:18px -18px -18px 18px;
  border:1px solid var(--line);border-radius:var(--r-lg);z-index:-1;
}
.hv-num{
  position:absolute;left:-10px;bottom:-24px;
  font-family:var(--font-serif);font-size:76px;line-height:1;
  color:rgba(22,22,26,.08);font-variant-numeric:tabular-nums;letter-spacing:-.02em;
  pointer-events:none;
}

/* 板块通用 */
.section{padding:88px 0;}
.section-sand{background:var(--sand);}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;flex-wrap:wrap;margin-bottom:44px;
}
.section-head .sh-left{max-width:640px;}
.section-head h2{font-size:clamp(24px,3vw,36px);margin-bottom:12px;}
.section-head p{font-size:15.5px;color:var(--muted);max-width:600px;line-height:1.85;}
.section-tag{
  font-size:12.5px;letter-spacing:.16em;color:var(--accent);
  text-transform:uppercase;margin-bottom:12px;display:block;font-weight:600;
}

/* 卖点错列 */
.hl-list{border-bottom:1px solid var(--line);}
.hl-item{
  display:grid;grid-template-columns:110px 1fr;gap:34px;
  padding:34px 0;border-top:1px solid var(--line);align-items:start;
}
.hl-item.reverse{grid-template-columns:1fr 110px;}
.hl-item.reverse .hl-num{order:2;text-align:right;}
.hl-item.reverse .hl-body{order:1;}
.hl-num{
  font-family:var(--font-serif);font-size:42px;line-height:1;
  color:var(--accent);font-variant-numeric:tabular-nums;letter-spacing:-.02em;
  opacity:.9;
}
.hl-body h3{font-size:21px;margin-bottom:10px;}
.hl-body p{font-size:15.5px;color:var(--ink-2);line-height:1.85;max-width:660px;}

/* 图墙 */
.gallery-grid{column-count:3;column-gap:20px;}
.g-item{
  position:relative;display:block;break-inside:avoid;
  margin-bottom:20px;border-radius:var(--r-md);overflow:hidden;
  box-shadow:var(--sh-1);background:var(--ink);
}
.g-item img{width:100%;height:100%;object-fit:cover;transition:transform .55s cubic-bezier(.22,.61,.36,1);}
.g-a{aspect-ratio:4/5;}
.g-b{aspect-ratio:1/1;}
.g-c{aspect-ratio:16/9;}
.g-overlay{
  position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;
  gap:8px;padding:20px;background:linear-gradient(to top,rgba(22,22,26,.82) 0%,rgba(22,22,26,.28) 46%,rgba(22,22,26,0) 78%);
  opacity:.94;transition:opacity .35s ease;
}
.g-item:hover img{transform:scale(1.03);}
.g-item:hover .g-overlay{opacity:1;}
.g-overlay strong{font-family:var(--font-serif);font-size:17px;color:#fff;line-height:1.4;font-weight:600;}
.g-badge{
  align-self:flex-start;font-size:11.5px;letter-spacing:.08em;
  padding:3px 10px;border-radius:999px;background:rgba(255,255,255,.16);
  color:#fff;backdrop-filter:blur(2px);
}

/* 最新信息列表 */
.news-list{border-top:1px solid var(--line);}
.news-row{
  display:grid;grid-template-columns:104px 1fr 24px;gap:22px;align-items:start;
  padding:24px 4px;border-bottom:1px solid var(--line);
  transition:background .25s ease,padding-left .25s ease;
}
.news-row:hover{background:rgba(255,255,255,.55);padding-left:12px;}
.news-time{
  font-variant-numeric:tabular-nums;font-size:13.5px;color:var(--muted);
  padding-top:3px;letter-spacing:.02em;
}
.news-body h3{font-size:17.5px;margin-bottom:8px;transition:color .25s ease;}
.news-row:hover .news-body h3{color:var(--accent);}
.news-body p{font-size:14.5px;color:var(--muted);line-height:1.75;margin:0;}
.news-meta{display:flex;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap;}
.news-arrow{color:var(--muted);padding-top:6px;transition:transform .25s ease,color .25s ease;}
.news-row:hover .news-arrow{transform:translateX(4px);color:var(--accent);}
.news-empty{
  border:1px dashed var(--line);border-radius:var(--r-md);
  padding:44px 24px;text-align:center;background:rgba(255,255,255,.5);
}
.news-empty p{color:var(--muted);font-size:15px;margin-bottom:18px;}

/* 报名 CTA */
.signup{background:var(--ink);color:#fff;padding:88px 0;position:relative;overflow:hidden;}
.signup::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;
  border-radius:50%;border:1px solid rgba(255,255,255,.07);
}
.signup-grid{display:grid;grid-template-columns:1fr 460px;gap:64px;align-items:center;position:relative;z-index:2;}
.signup h2{color:#fff;font-size:clamp(24px,3vw,38px);margin-bottom:18px;}
.signup p.lead{color:rgba(255,255,255,.72);font-size:16px;line-height:1.9;max-width:480px;}
.step-list{margin-top:32px;display:flex;flex-direction:column;gap:18px;}
.step-item{display:flex;gap:16px;align-items:flex-start;}
.step-num{
  flex:0 0 30px;width:30px;height:30px;border-radius:9px;
  background:rgba(255,255,255,.1);color:#fff;font-size:13px;font-weight:600;
  display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
}
.step-text{font-size:14.5px;color:rgba(255,255,255,.75);line-height:1.75;}
.step-text strong{color:#fff;display:block;font-size:15.5px;font-weight:600;margin-bottom:2px;font-family:var(--font-sans);}
.form-card{
  background:var(--paper);border-radius:var(--r-lg);padding:32px 30px;
  box-shadow:0 30px 60px -30px rgba(0,0,0,.6);
}
.form-card h3{font-size:20px;margin-bottom:6px;}
.form-card .form-hint{font-size:13.5px;color:var(--muted);margin-bottom:22px;}
.form-field{margin-bottom:16px;}
.form-field label{
  display:block;font-size:13px;color:var(--ink-2);letter-spacing:.04em;
  margin-bottom:7px;font-weight:500;
}
.form-card input[type="text"],
.form-card input[type="tel"],
.form-card select{
  width:100%;background:#fff;border:1.5px solid var(--line);
  border-radius:var(--r-sm);padding:12px 14px;font-size:15px;color:var(--ink);
  transition:border-color .25s ease,box-shadow .25s ease;
  appearance:none;
}
.form-card select{
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath fill='%237C7A74' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;background-size:11px;
  padding-right:36px;
}
.form-card input::placeholder{color:#B3AFA6;}
.form-card input:focus,
.form-card select:focus{
  outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(200,69,42,.13);
}
.check-line{display:flex;align-items:flex-start;gap:9px;margin:6px 0 20px;}
.check-line input{margin-top:5px;width:16px;height:16px;accent-color:var(--accent);flex:0 0 16px;}
.check-line label{font-size:13px;color:var(--muted);line-height:1.65;margin:0;font-weight:400;}
.form-card .btn-accent{width:100%;justify-content:center;}
.form-note{
  margin-top:14px;font-size:13.5px;color:var(--jade);
  background:rgba(31,95,82,.08);border-radius:var(--r-sm);padding:10px 14px;
}
.form-err{color:var(--accent);font-size:12.5px;margin-top:6px;display:none;}

/* FAQ */
.faq-wrap{max-width:880px;}
.accordion-item{
  background:transparent;border:0;border-top:1px solid var(--line);
}
.accordion-item:last-child{border-bottom:1px solid var(--line);}
.accordion-header{margin:0;}
.accordion-button{
  display:flex;align-items:center;gap:16px;
  background:transparent;box-shadow:none;border:0;
  padding:22px 4px;font-size:17px;font-weight:600;color:var(--ink);
  font-family:var(--font-sans);line-height:1.5;
}
.accordion-button:not(.collapsed){background:transparent;color:var(--accent);box-shadow:none;}
.accordion-button:focus{box-shadow:none;outline:2px solid var(--accent);outline-offset:-2px;}
.accordion-button::after{
  content:"+";background-image:none;width:auto;height:auto;
  font-size:24px;font-weight:400;color:var(--accent);
  margin-left:auto;line-height:1;transition:transform .28s ease;
  display:flex;align-items:center;justify-content:center;
}
.accordion-button:not(.collapsed)::after{transform:rotate(45deg);}
.faq-num{
  font-variant-numeric:tabular-nums;font-size:13px;color:var(--muted);
  letter-spacing:.06em;flex:0 0 26px;
}
.accordion-body{
  padding:0 4px 24px 46px;font-size:15px;color:var(--muted);line-height:1.9;
  max-width:720px;
}

/* 页脚 */
.site-footer{background:var(--ink);color:rgba(255,255,255,.66);padding:76px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:52px;}
.f-brand .brand{margin-bottom:18px;}
.f-brand p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.55);max-width:300px;}
.f-contact{margin-top:18px;font-size:13.5px;color:rgba(255,255,255,.5);font-variant-numeric:tabular-nums;}
.f-col h4{
  font-family:var(--font-sans);font-size:13px;letter-spacing:.14em;
  color:#fff;margin-bottom:18px;font-weight:600;text-transform:uppercase;opacity:.85;
}
.f-col a{
  display:block;font-size:14px;color:rgba(255,255,255,.6);
  padding:6px 0;transition:color .25s ease,transform .25s ease;
}
.f-col a:hover{color:#fff;transform:translateX(3px);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(255,255,255,.42);letter-spacing:.02em;
}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .62s cubic-bezier(.22,.61,.36,1),transform .62s cubic-bezier(.22,.61,.36,1);}
.reveal.is-in{opacity:1;transform:none;}

/* 响应式 */
@media (max-width:1199px){
  .sidebar{width:200px;}
  .site-main{margin-left:200px;}
  .hero-grid{gap:40px;}
  .signup-grid{grid-template-columns:1fr 420px;gap:44px;}
}
@media (max-width:991px){
  .sidebar{display:none;}
  .site-main{margin-left:0;}
  .mobile-bar{display:flex;}
  .countdown-bar{top:60px;}
  .wrap{padding:0 20px;}
  .hero{padding:52px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-visual{order:-1;}
  .hero-visual::before{display:none;}
  .hv-num{display:none;}
  .section{padding:72px 0;}
  .gallery-grid{column-count:2;column-gap:16px;}
  .g-item{margin-bottom:16px;}
  .signup{padding:72px 0;}
  .signup-grid{grid-template-columns:1fr;gap:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .hl-item{grid-template-columns:84px 1fr;gap:24px;}
  .hl-item.reverse{grid-template-columns:1fr 84px;}
  .hl-num{font-size:34px;}
  .news-row{grid-template-columns:88px 1fr 20px;gap:16px;}
}
@media (max-width:767px){
  body{font-size:16px;line-height:1.8;}
  .hero h1{font-size:clamp(30px,7.4vw,40px);}
  .section-head h2{font-size:clamp(22px,5.4vw,28px);}
  .section{padding:56px 0;}
  .signup{padding:56px 0;}
  .cd-wrap{padding:10px 18px;gap:10px;}
  .cd-left{font-size:12.5px;}
  .cd-unit b{font-size:16px;min-width:26px;}
  .gallery-grid{column-count:1;}
  .hero-stats{gap:0;flex-wrap:wrap;}
  .stat{padding-right:20px;margin-right:20px;margin-bottom:14px;}
  .stat strong{font-size:26px;}
  .hl-item,.hl-item.reverse{grid-template-columns:1fr;gap:10px;}
  .hl-item.reverse .hl-num{order:0;text-align:left;}
  .hl-item.reverse .hl-body{order:0;}
  .hl-num{font-size:30px;}
  .news-row{grid-template-columns:1fr 20px;gap:10px;padding:20px 2px;}
  .news-time{grid-column:1/-1;padding-top:0;}
  .news-meta{margin-bottom:8px;}
  .form-card{padding:26px 20px;}
  .accordion-button{font-size:16px;padding:18px 2px;gap:12px;}
  .accordion-body{padding:0 2px 20px 34px;font-size:14.5px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:36px;}
  .site-footer{padding-top:56px;}
  .hero-actions .btn-solid,.hero-actions .btn-line{width:100%;justify-content:center;}
}
@media (max-width:519px){
  .wrap{padding:0 16px;}
  .cd-btn{padding:7px 12px;font-size:12px;}
  .hero{padding:40px 0 52px;}
  .hero-actions{gap:10px;}
  .btn-solid,.btn-line,.btn-accent{padding:13px 20px;font-size:14.5px;}
  .stat{padding-right:16px;margin-right:16px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
}

/* roulang page: category1 */
:root{
  --paper:#F5F2EB;
  --ink:#16161A;
  --ink-2:#3A3A42;
  --muted:#7C7A74;
  --line:#E2DDD2;
  --accent:#C8452A;
  --accent-hover:#A8371F;
  --accent-soft:#FBEAE4;
  --jade:#1F5F52;
  --sand:#EDE6D8;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --shadow-1:0 1px 2px rgba(22,22,26,.05),0 8px 24px -12px rgba(22,22,26,.12);
  --shadow-2:0 20px 40px -20px rgba(22,22,26,.28);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --font-serif:"Songti SC","Noto Serif SC",SimSun,serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-2);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  margin:0;
  font-family:var(--font-serif);
  font-weight:600;
  color:var(--ink);
  line-height:1.15;
  letter-spacing:.01em;
}
p{margin:0}
img{max-width:100%;display:block}
a{color:var(--jade);text-decoration:none;transition:color .25s ease}
a:hover{color:var(--accent)}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
section[id],div[id]{scroll-margin-top:76px}

/* ============ 布局骨架 ============ */
.layout{display:flex;align-items:flex-start;min-height:100vh}
.main-area{flex:1 1 auto;min-width:0}
.wrap{max-width:1280px;margin:0 auto;padding-left:24px;padding-right:24px}

/* ============ 阅读进度条 ============ */
.read-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--accent);z-index:2000;transition:width .12s linear}

/* ============ 品牌 ============ */
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:inherit}
.brand-mark{
  width:38px;height:38px;flex:0 0 auto;
  border-radius:11px;background:var(--accent);color:#fff;
  display:grid;place-items:center;
  font-family:var(--font-serif);font-size:20px;font-weight:600;
  box-shadow:0 6px 16px -8px rgba(200,69,42,.8);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-family:var(--font-serif);font-size:19px;letter-spacing:.05em;font-weight:600}
.brand-text em{font-style:normal;font-size:11px;letter-spacing:.14em;color:var(--muted)}

/* ============ 左侧竖向导航 ============ */
.side-nav{
  position:sticky;top:0;
  flex:0 0 232px;width:232px;height:100vh;
  background:var(--ink);color:#fff;
  display:flex;flex-direction:column;
  z-index:1040;
}
.side-scroll{
  height:100%;overflow-y:auto;
  padding:28px 20px 22px;
  display:flex;flex-direction:column;gap:26px;
  scrollbar-width:none;
}
.side-scroll::-webkit-scrollbar{display:none;width:0;height:0}
.side-nav .brand{color:#fff}
.side-nav .brand-text em{color:rgba(255,255,255,.55)}
.side-nav-links{display:flex;flex-direction:column;gap:2px}
.side-nav-links .nav-link{
  position:relative;
  display:block;
  padding:12px 14px;
  border-radius:10px;
  color:rgba(255,255,255,.78);
  font-size:15px;
  letter-spacing:.02em;
  transition:background .25s ease,color .25s ease,padding-left .25s ease;
}
.side-nav-links .nav-link::before{
  content:"";position:absolute;left:0;top:50%;
  transform:translateY(-50%);
  width:3px;height:0;background:var(--accent);border-radius:2px;
  transition:height .25s ease;
}
.side-nav-links .nav-link:hover{background:rgba(255,255,255,.06);color:#fff;padding-left:20px}
.side-nav-links .nav-link:hover::before{height:18px}
.side-nav-links .nav-link.active{background:rgba(255,255,255,.09);color:#fff;font-weight:600}
.side-nav-links .nav-link.active::before{height:22px}
.side-sublinks{
  display:flex;flex-direction:column;gap:8px;
  padding-top:18px;border-top:1px solid rgba(255,255,255,.12);
}
.side-title{font-size:11px;letter-spacing:.16em;color:rgba(255,255,255,.42);margin-bottom:4px}
.side-sublinks a{font-size:14px;color:rgba(255,255,255,.62);padding:3px 0}
.side-sublinks a:hover{color:#fff}
.side-foot{
  margin-top:auto;
  display:flex;flex-direction:column;gap:14px;
  padding-top:18px;border-top:1px solid rgba(255,255,255,.12);
}
.btn-side{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 14px;
  border:1.5px solid rgba(255,255,255,.4);
  border-radius:10px;
  background:transparent;
  color:#fff;font-size:13.5px;letter-spacing:.04em;
  transition:background .25s ease,color .25s ease,border-color .25s ease;
}
.btn-side:hover{background:#fff;color:var(--ink);border-color:#fff}
.side-meta{font-size:11.5px;line-height:1.75;color:rgba(255,255,255,.45)}

/* ============ 移动端顶栏 ============ */
.topbar{
  display:none;
  position:sticky;top:0;z-index:1035;
  height:60px;
  align-items:center;justify-content:space-between;
  padding:0 18px;
  background:rgba(245,242,235,.96);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.topbar .brand{color:var(--ink)}
.topbar .brand-mark{width:34px;height:34px;font-size:18px;border-radius:9px}
.topbar .brand-text strong{font-size:17px}
.topbar .brand-text em{color:var(--muted)}
.burger{
  width:44px;height:44px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border:1px solid var(--line);border-radius:10px;background:#fff;
  padding:0;cursor:pointer;transition:background .25s ease,border-color .25s ease;
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:background .25s ease}
.burger:hover{background:var(--ink);border-color:var(--ink)}
.burger:hover span{background:#fff}

/* ============ 移动端抽屉 ============ */
.mobile-nav{background:var(--ink);color:#fff;width:300px;max-width:88vw}
.mobile-nav .offcanvas-header{border-bottom:1px solid rgba(255,255,255,.12);padding:18px 20px}
.mobile-nav .offcanvas-title{color:#fff;font-size:16px;letter-spacing:.1em}
.mobile-nav .btn-close{filter:invert(1) grayscale(1) brightness(2);opacity:.75}
.mobile-nav .btn-close:hover{opacity:1}
.mobile-nav .offcanvas-body{padding:22px 20px 30px;display:flex;flex-direction:column;gap:24px}
.mobile-nav .side-sublinks{margin-top:0}

/* ============ 通用按钮 ============ */
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 26px;
  border-radius:10px;
  font-size:15.5px;font-weight:600;letter-spacing:.02em;
  transition:transform .25s ease,background .25s ease,color .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.btn-main{background:var(--accent);border:1.5px solid var(--accent);color:#fff;box-shadow:var(--shadow-1)}
.btn-main:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-main:active{transform:translateY(0)}
.btn-ghost{background:transparent;border:1.5px solid var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-ghost:active{transform:translateY(0)}
.btn-light{background:#fff;border:1.5px solid #fff;color:var(--ink)}
.btn-light:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.link-arrow{
  display:inline-flex;align-items:center;gap:7px;
  font-weight:600;font-size:15px;color:var(--jade);
  border-bottom:1px solid transparent;
  transition:color .25s ease,border-color .25s ease;
}
.link-arrow span{transition:transform .25s ease}
.link-arrow:hover{color:var(--accent);border-bottom-color:var(--accent)}
.link-arrow:hover span{transform:translateX(4px)}

/* ============ 面包屑与徽章 ============ */
.crumb{font-size:13px;color:var(--muted);letter-spacing:.04em;margin-bottom:20px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--accent)}
.crumb .sep{margin:0 9px;color:#C6C0B3}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent);
  font-size:13px;font-weight:600;letter-spacing:.06em;
}
.chip-jade{background:rgba(31,95,82,.1);color:var(--jade)}

/* ============ 首屏横幅 ============ */
.banner{background:var(--sand);border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.banner-inner{
  display:grid;grid-template-columns:1.15fr .85fr;
  gap:56px;align-items:center;
  padding-top:64px;padding-bottom:64px;
}
.banner h1{font-size:clamp(30px,3.6vw,50px);margin:18px 0 20px}
.banner .lead{font-size:17px;line-height:1.85;color:var(--ink-2);max-width:600px}
.banner .lead-sub{margin-top:14px;font-size:15px;line-height:1.85;color:var(--muted);max-width:600px}
.banner-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.banner-media{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-1)}
.banner-media img{width:100%;height:340px;object-fit:cover}
.banner-media::before{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.2) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.2) 1px,transparent 1px);
  background-size:56px 56px;
}
.banner-media::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(180deg,rgba(22,22,26,0) 45%,rgba(22,22,26,.45) 100%);
}
.banner-num{
  position:absolute;right:18px;bottom:8px;z-index:2;
  font-family:var(--font-serif);font-size:64px;line-height:1;
  color:rgba(255,255,255,.72);letter-spacing:-.02em;
}

/* ============ 板块通用 ============ */
.section{padding-top:96px;padding-bottom:96px}
.section--sand{background:var(--sand);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:740px;margin-bottom:40px}
.sec-kicker{font-size:13px;letter-spacing:.16em;color:var(--jade);font-weight:600;margin-bottom:12px}
.sec-head h2{font-size:clamp(24px,3vw,36px);margin-bottom:14px}
.sec-head p{color:var(--muted);font-size:16px}

/* ============ 图文交错 ============ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split + .split{margin-top:80px}
.split--rev .split-media{order:2}
.split-text{max-width:640px}
.split-text h3{font-size:23px;margin-bottom:18px;position:relative;padding-left:18px}
.split-text h3::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:2px;background:var(--accent)}
.split-text p{font-size:16px;line-height:1.9;color:var(--ink-2);margin-bottom:14px}
.split-text p:last-child{margin-bottom:0}
.split-media img{
  width:100%;height:340px;object-fit:cover;
  border-radius:var(--r-md);
  box-shadow:var(--shadow-1);
  transition:transform .5s ease,box-shadow .5s ease;
}
.split-media:hover img{transform:translateY(-4px);box-shadow:var(--shadow-2)}

/* ============ 参数区 ============ */
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 56px;margin:0}
.spec-item{display:flex;gap:18px;align-items:baseline;padding:20px 0;border-bottom:1px dashed #D5CDBC}
.spec-item dt{flex:0 0 118px;font-size:13.5px;color:var(--muted);letter-spacing:.05em;font-weight:400}
.spec-item dd{margin:0;font-size:16px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums}

/* ============ 图墙 ============ */
.gallery-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.g-card{
  position:relative;display:block;
  border-radius:var(--r-md);overflow:hidden;
  background:var(--ink);box-shadow:var(--shadow-1);
  transition:box-shadow .4s ease,transform .4s ease;
}
.g-card img{width:100%;aspect-ratio:3/2;object-fit:cover;transition:transform .6s ease,opacity .4s ease}
.g-mask{
  position:absolute;inset:0;
  display:flex;flex-direction:column;justify-content:flex-end;
  padding:22px;
  background:linear-gradient(180deg,rgba(22,22,26,0) 32%,rgba(22,22,26,.84) 100%);
  color:#fff;
}
.g-mask h4{color:#fff;font-size:18px;margin-bottom:6px}
.g-mask p{font-size:13.5px;color:rgba(255,255,255,.78);margin:0}
.g-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.g-card:hover img{transform:scale(1.04);opacity:.94}

/* ============ 提示条 ============ */
.notice{
  display:flex;gap:20px;align-items:flex-start;
  max-width:920px;margin:0 auto;
  padding:26px 30px;
  background:var(--paper);
  border-left:4px solid var(--accent);
  border-radius:0 var(--r-md) var(--r-md) 0;
  box-shadow:var(--shadow-1);
}
.notice-icon{
  flex:0 0 auto;width:34px;height:34px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--accent-soft);color:var(--accent);
  font-weight:700;font-size:16px;
}
.notice-body h3{font-size:17px;margin-bottom:8px}
.notice-body p{font-size:15px;color:var(--ink-2);line-height:1.85}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;margin:0 auto}
.faq-wrap .accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent}
.faq-wrap .accordion-button{
  position:relative;
  background:transparent;
  padding:22px 48px 22px 54px;
  font-family:var(--font-sans);
  font-size:16.5px;font-weight:600;
  color:var(--ink);
  box-shadow:none;
  border-radius:0;
}
.faq-wrap .accordion-button:not(.collapsed){background:transparent;color:var(--accent);box-shadow:none}
.faq-wrap .accordion-button:focus{box-shadow:none;border:0;outline:2px solid var(--accent);outline-offset:-2px}
.faq-wrap .accordion-button::after{
  background-image:none !important;
  content:"+";
  width:auto;height:auto;
  font-size:22px;line-height:1;
  color:var(--muted);
  transition:transform .3s ease,color .3s ease;
}
.faq-wrap .accordion-button:not(.collapsed)::after{transform:rotate(45deg);color:var(--accent)}
.acc-num{
  position:absolute;left:16px;top:50%;transform:translateY(-50%);
  font-family:var(--font-serif);font-size:14px;color:var(--muted);
  font-variant-numeric:tabular-nums;letter-spacing:.04em;
}
.faq-wrap .accordion-body{
  padding:0 48px 26px 54px;
  font-size:15px;line-height:1.9;color:var(--muted);
}

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink);color:#fff;
  border-radius:var(--r-lg);
  padding:56px;
  display:grid;grid-template-columns:1.25fr .75fr;
  gap:44px;align-items:center;
  box-shadow:var(--shadow-2);
}
.cta-band::before{
  content:"";position:absolute;right:-80px;top:-80px;width:260px;height:260px;
  border-radius:50%;border:1px solid rgba(255,255,255,.12);
}
.cta-band h2{color:#fff;font-size:clamp(24px,3vw,34px);margin-bottom:16px}
.cta-band p{color:rgba(255,255,255,.74);font-size:15.5px;line-height:1.9;max-width:560px}
.cta-steps{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.cta-steps span{
  font-size:12.5px;letter-spacing:.06em;
  padding:6px 14px;border-radius:999px;
  border:1px solid rgba(255,255,255,.22);
  color:rgba(255,255,255,.82);
}
.cta-actions{display:flex;flex-direction:column;gap:14px;position:relative;z-index:2}
.cta-actions .btn-main{width:100%}
.cta-actions .btn-ghost{border-color:rgba(255,255,255,.45);color:#fff;width:100%}
.cta-actions .btn-ghost:hover{background:#fff;color:var(--ink);border-color:#fff}
.cta-note{font-size:12.5px;color:rgba(255,255,255,.5);line-height:1.7;text-align:center}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding-top:72px;margin-top:96px}
.site-footer .wrap{max-width:1280px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.f-brand .brand{margin-bottom:18px;color:#fff}
.f-brand .brand-text em{color:rgba(255,255,255,.55)}
.f-brand p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.6);max-width:330px}
.f-contact{margin-top:16px;font-size:13px;color:rgba(255,255,255,.45);line-height:1.85}
.f-col h4{
  font-family:var(--font-sans);
  font-size:14px;font-weight:600;color:#fff;
  letter-spacing:.1em;margin-bottom:16px;
}
.f-col a{
  display:block;
  font-size:14px;color:rgba(255,255,255,.6);
  padding:6px 0;
  transition:color .25s ease,transform .25s ease;
}
.f-col a:hover{color:#fff;transform:translateX(3px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  padding:22px 0;
  font-size:12.5px;color:rgba(255,255,255,.45);
}

/* ============ 淡入动效 ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .62s cubic-bezier(.22,.61,.36,1),transform .62s cubic-bezier(.22,.61,.36,1)}
.reveal.is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .side-nav{flex-basis:200px;width:200px}
  .side-scroll{padding:24px 16px 20px}
  .banner-inner{gap:40px}
  .split{gap:40px}
  .spec-grid{gap:0 36px}
  .cta-band{padding:46px}
}
@media (max-width:991.98px){
  .layout{display:block}
  .side-nav{display:none}
  .topbar{display:flex}
  .section{padding-top:72px;padding-bottom:72px}
  .banner-inner{grid-template-columns:1fr;gap:32px;padding-top:44px;padding-bottom:48px}
  .banner-media img{height:270px}
  .banner-num{font-size:52px}
  .split{grid-template-columns:1fr;gap:28px}
  .split + .split{margin-top:56px}
  .split--rev .split-media{order:0}
  .split-media img{height:280px}
  .spec-grid{grid-template-columns:1fr}
  .gallery-3{grid-template-columns:repeat(2,1fr);gap:20px}
  .cta-band{grid-template-columns:1fr;gap:32px;padding:40px}
  .cta-actions{flex-direction:row;flex-wrap:wrap}
  .cta-actions .btn-main,.cta-actions .btn-ghost{width:auto;flex:1 1 180px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .site-footer{margin-top:72px}
}
@media (max-width:767.98px){
  body{font-size:16px;line-height:1.8}
  .wrap{padding-left:18px;padding-right:18px}
  .section{padding-top:56px;padding-bottom:56px}
  .banner-inner{padding-top:34px;padding-bottom:38px}
  .banner h1{font-size:clamp(26px,7.4vw,34px);margin:16px 0 16px}
  .banner .lead{font-size:15.5px}
  .banner .lead-sub{font-size:14px}
  .banner-actions{gap:12px;margin-top:26px}
  .banner-actions .btn-main,.banner-actions .btn-ghost{width:100%}
  .banner-media img{height:230px}
  .banner-num{font-size:44px;right:14px;bottom:6px}
  .sec-head{margin-bottom:28px}
  .sec-head h2{font-size:clamp(22px,6vw,28px)}
  .split-text h3{font-size:20px;padding-left:14px}
  .split-text p{font-size:15.5px}
  .split-media img{height:230px}
  .spec-item{flex-direction:column;gap:4px;padding:16px 0}
  .spec-item dt{flex:none}
  .gallery-3{grid-template-columns:1fr}
  .notice{padding:20px 20px;gap:14px}
  .faq-wrap .accordion-button{padding:18px 40px 18px 46px;font-size:15.5px}
  .faq-wrap .accordion-body{padding:0 18px 22px 46px;font-size:14.5px}
  .acc-num{left:6px;font-size:13px}
  .cta-band{padding:30px 22px;border-radius:var(--r-md)}
  .cta-band p{font-size:14.5px}
  .cta-actions{flex-direction:column}
  .cta-actions .btn-main,.cta-actions .btn-ghost{width:100%;flex:none}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .site-footer{padding-top:52px;margin-top:56px}
  .footer-bottom{flex-direction:column;gap:6px;font-size:12px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --paper:#F5F2EB;
  --ink:#16161A;
  --ink-2:#3A3A42;
  --muted:#7C7A74;
  --line:#E2DDD2;
  --accent:#C8452A;
  --accent-hover:#A8371F;
  --accent-soft:#FBEAE4;
  --jade:#1F5F52;
  --sand:#EDE6D8;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --sh-1:0 1px 2px rgba(22,22,26,.05),0 8px 24px -12px rgba(22,22,26,.12);
  --sh-2:0 20px 40px -20px rgba(22,22,26,.28);
  --ff-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --ff-serif:"Songti SC","Noto Serif SC","SimSun",Georgia,serif;
  --bs-body-bg:#F5F2EB;
  --bs-body-color:#3A3A42;
  --bs-primary:#C8452A;
  --bs-link-color:#1F5F52;
  --bs-link-hover-color:#C8452A;
  --bs-border-color:#E2DDD2;
  --bs-border-radius:14px;
  --bs-font-sans-serif:var(--ff-sans);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--ff-sans);
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink-2);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--jade);text-decoration:none;transition:color .22s ease}
a:hover{color:var(--accent)}
h1,h2,h3,h4{font-family:var(--ff-serif);font-weight:600;letter-spacing:.01em;line-height:1.15;color:var(--ink);margin:0}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0}
button{font-family:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:3px;
  border-radius:4px;
}
::selection{background:var(--accent-soft);color:var(--accent-hover)}

/* ===== 阅读进度条 ===== */
.reading-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  z-index:1200;
  pointer-events:none;
  background:transparent;
}
.reading-progress span{
  display:block;
  height:100%;
  width:0;
  background:var(--accent);
  transition:width .12s linear;
}

/* ===== 布局骨架 ===== */
.app-shell{
  display:flex;
  align-items:flex-start;
  min-height:100vh;
}
.content{
  flex:1 1 auto;
  min-width:0;
  display:flex;
  flex-direction:column;
}
.wrap{
  width:100%;
  max-width:1040px;
  margin:0 auto;
  padding:0 24px;
}

/* ===== 左侧竖向导航 ===== */
.side-nav{
  position:sticky;
  top:0;
  flex:0 0 232px;
  width:232px;
  height:100vh;
  background:var(--ink);
  display:flex;
  flex-direction:column;
  padding:28px 20px 22px;
  overflow-y:auto;
  scrollbar-width:none;
  z-index:1040;
}
.side-nav::-webkit-scrollbar{display:none}

.brand{display:flex;align-items:center;gap:11px;text-decoration:none}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;
  display:grid;place-items:center;
  border-radius:11px;
  background:var(--accent);
  color:#fff;
  font-family:var(--ff-serif);
  font-size:20px;
  font-weight:600;
  line-height:1;
}
.brand-text{display:flex;flex-direction:column;line-height:1.28}
.brand-text strong{
  font-family:var(--ff-serif);
  font-size:19px;
  font-weight:600;
  letter-spacing:.06em;
  color:#fff;
}
.brand-text em{
  font-style:normal;
  font-size:11px;
  letter-spacing:.14em;
  color:rgba(255,255,255,.55);
}

.side-nav-links{
  display:flex;
  flex-direction:column;
  gap:2px;
  margin-top:34px;
}
.side-nav-links .nav-link{
  position:relative;
  display:block;
  padding:11px 12px 11px 16px;
  font-size:15.5px;
  line-height:1.5;
  color:rgba(255,255,255,.72);
  border-radius:8px;
  transition:color .22s ease,background .22s ease;
}
.side-nav-links .nav-link::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:3px;height:0;
  background:var(--accent);
  border-radius:2px;
  transition:height .25s cubic-bezier(.22,.61,.36,1);
}
.side-nav-links .nav-link:hover{
  color:#fff;
  background:rgba(255,255,255,.05);
}
.side-nav-links .nav-link:hover::before{height:16px}
.side-nav-links .nav-link.active{
  color:#fff;
  background:rgba(255,255,255,.06);
}
.side-nav-links .nav-link.active::before{height:20px}

.side-nav-sub{
  margin-top:28px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.1);
  display:flex;
  flex-direction:column;
  gap:4px;
}
.side-nav-sub .sub-title{
  margin:0 0 8px 16px;
  font-size:11px;
  letter-spacing:.16em;
  color:rgba(255,255,255,.35);
}
.side-nav-sub a{
  display:block;
  padding:6px 0 6px 16px;
  font-size:14px;
  color:rgba(255,255,255,.62);
  transition:color .22s ease,padding-left .22s ease;
}
.side-nav-sub a:hover{color:#fff;padding-left:19px}

.side-nav-foot{
  margin-top:auto;
  padding-top:30px;
  display:flex;
  flex-direction:column;
  gap:14px;
}
.ghost-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:10px 16px;
  border:1.5px solid rgba(255,255,255,.28);
  border-radius:10px;
  font-size:13.5px;
  letter-spacing:.04em;
  color:#fff;
  transition:background .22s ease,border-color .22s ease,color .22s ease;
}
.ghost-btn:hover{
  border-color:var(--accent);
  background:var(--accent);
  color:#fff;
}
.side-contact{
  margin:0;
  font-size:12.5px;
  line-height:1.85;
  color:rgba(255,255,255,.45);
  font-variant-numeric:tabular-nums;
}
.side-copy{
  margin:0;
  font-size:11.5px;
  color:rgba(255,255,255,.3);
}

/* ===== 移动端顶栏 ===== */
.mobile-topbar{display:none}
.brand-sm{display:flex;align-items:center;gap:9px;text-decoration:none}
.brand-sm .brand-mark{width:32px;height:32px;flex:0 0 32px;font-size:16px;border-radius:9px}
.brand-sm .txt{display:flex;flex-direction:column;line-height:1.16}
.brand-sm .txt strong{
  font-family:var(--ff-serif);
  font-size:16px;
  font-weight:600;
  letter-spacing:.05em;
  color:var(--ink);
}
.brand-sm .txt em{
  font-style:normal;
  font-size:10px;
  letter-spacing:.12em;
  color:var(--muted);
}
.hamburger{
  width:44px;height:44px;
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  background:transparent;
  border:1px solid var(--line);
  border-radius:10px;
  cursor:pointer;
  transition:border-color .22s ease,background .22s ease;
}
.hamburger:hover{border-color:var(--accent);background:var(--accent-soft)}
.hamburger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px}

/* ===== 抽屉导航 ===== */
.offcanvas{
  background:var(--ink);
  color:rgba(255,255,255,.78);
  max-width:86vw;
}
.offcanvas-header{
  border-bottom:1px solid rgba(255,255,255,.1);
  padding:18px 20px;
}
.offcanvas-title{
  font-family:var(--ff-serif);
  font-size:17px;
  letter-spacing:.04em;
  color:#fff;
}
.offcanvas .btn-close{
  filter:invert(1) grayscale(1) brightness(1.8);
  opacity:.75;
}
.offcanvas .btn-close:hover{opacity:1}
.offcanvas-body{padding:22px 20px 30px}
.m-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:26px}
.m-nav a{
  display:block;
  min-height:44px;
  padding:11px 14px;
  border-radius:10px;
  font-size:15px;
  color:rgba(255,255,255,.75);
  transition:background .22s ease,color .22s ease;
}
.m-nav a:hover,.m-nav a:focus-visible{background:rgba(255,255,255,.07);color:#fff}
.m-nav-title{
  margin:0 0 10px 14px;
  font-size:11px;
  letter-spacing:.16em;
  color:rgba(255,255,255,.35);
}
.m-cta{margin-top:26px;width:100%;justify-content:center}
.m-contact{
  margin-top:22px;
  font-size:12.5px;
  line-height:1.9;
  color:rgba(255,255,255,.42);
}

/* ===== 面包屑 ===== */
.breadcrumb-line{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:40px 0 0;
  font-size:13px;
  letter-spacing:.02em;
  color:var(--muted);
}
.breadcrumb-line a{color:var(--muted)}
.breadcrumb-line a:hover{color:var(--accent)}
.breadcrumb-line .sep{color:var(--line)}
.breadcrumb-line .current{color:var(--ink-2)}

/* ===== 标题区 ===== */
.post-hero{padding-bottom:0}
.post-head{max-width:840px;padding:20px 0 0}
.badge-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.badge-tag{
  display:inline-flex;
  align-items:center;
  padding:6px 13px;
  border-radius:999px;
  font-size:13px;
  letter-spacing:.06em;
  line-height:1.5;
  background:var(--accent-soft);
  color:var(--accent-hover);
  border:1px solid #F1D5CB;
  transition:background .22s ease,color .22s ease,border-color .22s ease;
}
.badge-tag:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.badge-tag.jade{
  background:#E7F0ED;
  color:var(--jade);
  border-color:#CFE1DC;
}
.badge-tag.jade:hover{background:var(--jade);color:#fff;border-color:var(--jade)}
.post-head h1{
  margin:18px 0 0;
  font-size:clamp(28px,3.4vw,44px);
  line-height:1.24;
  letter-spacing:.01em;
  word-break:break-word;
}
.post-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:13px;
  margin-top:24px;
  padding-bottom:26px;
  border-bottom:1px solid var(--line);
  font-size:13.5px;
  color:var(--muted);
}
.post-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.post-meta .num{
  font-variant-numeric:tabular-nums;
  color:var(--ink-2);
  font-weight:600;
}

/* ===== 封面 ===== */
.post-cover{
  margin:36px 0 0;
  max-width:100%;
}
.post-cover-frame{
  border-radius:var(--r-lg);
  overflow:hidden;
  background:var(--sand);
  box-shadow:var(--sh-1);
}
.post-cover-frame img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
}
.post-cover figcaption{
  padding:12px 4px 0;
  font-size:13px;
  color:var(--muted);
}

/* ===== 正文排版 ===== */
.prose{
  max-width:720px;
  margin:44px auto 0;
  font-size:17px;
  line-height:1.9;
  color:var(--ink-2);
  word-break:break-word;
}
.prose p{margin:0 0 1.6em}
.prose h2{
  position:relative;
  margin:2.2em 0 .9em;
  padding-left:16px;
  font-size:clamp(22px,2.4vw,28px);
  line-height:1.32;
}
.prose h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.2em;
  width:3px;
  height:26px;
  background:var(--accent);
  border-radius:2px;
}
.prose h3{
  margin:1.9em 0 .8em;
  font-size:21px;
  color:var(--ink);
}
.prose h4{
  margin:1.6em 0 .7em;
  font-size:17px;
  color:var(--ink);
}
.prose img{
  margin:1.6em 0;
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
}
.prose blockquote{
  margin:1.8em 0;
  padding:20px 24px;
  border-left:3px solid var(--accent);
  background:var(--sand);
  border-radius:0 var(--r-md) var(--r-md) 0;
  font-size:16.5px;
  color:var(--ink-2);
}
.prose blockquote p:last-child{margin-bottom:0}
.prose ul,.prose ol{list-style:none;margin:1.2em 0 1.6em;padding-left:0}
.prose ul li{
  position:relative;
  padding-left:22px;
  margin-bottom:.7em;
}
.prose ul li::before{
  content:"";
  position:absolute;
  left:4px;
  top:.72em;
  width:7px;
  height:7px;
  background:var(--accent);
  border-radius:1px;
  transform:rotate(45deg);
}
.prose ol{counter-reset:prose-ol}
.prose ol li{
  position:relative;
  padding-left:32px;
  margin-bottom:.7em;
  counter-increment:prose-ol;
}
.prose ol li::before{
  content:counter(prose-ol,decimal-leading-zero);
  position:absolute;
  left:0;
  top:.28em;
  font-size:13px;
  font-weight:700;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}
.prose table{
  width:100%;
  border-collapse:collapse;
  margin:1.8em 0;
  font-size:15.5px;
}
.prose th{
  background:var(--sand);
  text-align:left;
  font-weight:600;
  color:var(--ink);
  padding:12px 14px;
  border-bottom:1px solid var(--line);
}
.prose td{
  padding:12px 14px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
.prose a{
  color:var(--jade);
  border-bottom:1px solid rgba(31,95,82,.32);
  transition:color .22s ease,border-color .22s ease;
}
.prose a:hover{color:var(--accent);border-color:var(--accent)}
.prose strong{color:var(--ink);font-weight:600}
.prose hr{
  border:0;
  border-top:1px solid var(--line);
  margin:2.4em 0;
}

/* ===== 文末标签与返回 ===== */
.post-tags{
  max-width:720px;
  margin:44px auto 0;
  padding-top:26px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.post-back-row{
  max-width:720px;
  margin:24px auto 0;
}
.back-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:6px 0;
  font-size:14.5px;
  color:var(--jade);
}
.back-link .arrow{transition:transform .22s ease}
.back-link:hover{color:var(--accent)}
.back-link:hover .arrow{transform:translateX(-4px)}

/* ===== 空态 ===== */
.empty-state{
  max-width:720px;
  margin:56px auto 0;
  padding:52px 32px;
  text-align:center;
  background:rgba(255,255,255,.66);
  border:1px dashed var(--line);
  border-radius:var(--r-lg);
}
.empty-state h2{
  font-size:clamp(22px,2.6vw,28px);
  margin-bottom:14px;
}
.empty-state p{
  max-width:420px;
  margin:0 auto 26px;
  font-size:15.5px;
  color:var(--muted);
}

/* ===== 按钮 ===== */
.btn-main{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  min-height:46px;
  padding:13px 26px;
  border:none;
  border-radius:10px;
  background:var(--accent);
  color:#fff;
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  cursor:pointer;
  transition:background .22s ease,transform .22s ease,box-shadow .22s ease,color .22s ease;
}
.btn-main:hover{
  background:var(--accent-hover);
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 16px 30px -16px rgba(200,69,42,.85);
}
.btn-main:active{transform:translateY(0);box-shadow:none}
.btn-main .arrow{transition:transform .22s ease}
.btn-main:hover .arrow{transform:translateX(4px)}

.text-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:14.5px;
  color:var(--jade);
  border-bottom:1px solid transparent;
  transition:color .22s ease,border-color .22s ease;
}
.text-link .arrow{transition:transform .22s ease}
.text-link:hover{color:var(--accent);border-color:var(--accent)}
.text-link:hover .arrow{transform:translateX(4px)}

/* ===== 相关推荐 ===== */
.related{padding:80px 0 0}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
  margin-bottom:30px;
}
.kicker{
  display:block;
  margin-bottom:10px;
  font-family:var(--ff-sans);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--accent);
}
.section-head h2{font-size:clamp(24px,3vw,34px)}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.related-card{
  display:flex;
  flex-direction:column;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  color:inherit;
  transition:transform .3s cubic-bezier(.22,.61,.36,1),box-shadow .3s ease,border-color .3s ease;
}
.related-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--sh-2);
  border-color:#D6CFC0;
  color:inherit;
}
.related-card .thumb{
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--sand);
}
.related-card .thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.related-card:hover .thumb img{transform:scale(1.04)}
.rc-body{
  padding:18px 20px 22px;
  display:flex;
  flex-direction:column;
  gap:10px;
  flex:1 1 auto;
}
.rc-body h3{
  font-family:var(--ff-sans);
  font-size:17px;
  font-weight:600;
  line-height:1.5;
  color:var(--ink);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  transition:color .22s ease;
}
.related-card:hover .rc-body h3{color:var(--accent)}
.rc-date{
  margin-top:auto;
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--muted);
  font-variant-numeric:tabular-nums;
}

/* ===== CTA 条 ===== */
.cta-wrap{padding:80px 0 0}
.cta-strip{
  position:relative;
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
  padding:44px 40px;
  border-radius:var(--r-lg);
  background:var(--ink);
}
.cta-strip::after{
  content:"";
  position:absolute;
  right:-60px;
  bottom:-90px;
  width:240px;
  height:240px;
  border-radius:50%;
  background:radial-gradient(circle at center,rgba(200,69,42,.32),transparent 70%);
  pointer-events:none;
}
.cta-strip h2{
  color:#fff;
  font-size:clamp(21px,2.4vw,27px);
  position:relative;
  z-index:1;
}
.cta-strip p{
  position:relative;
  z-index:1;
  margin:12px 0 0;
  max-width:52ch;
  font-size:15px;
  line-height:1.85;
  color:rgba(255,255,255,.62);
}
.cta-strip .btn-main{position:relative;z-index:1}

/* ===== 页脚 ===== */
.site-footer{
  margin-top:96px;
  padding:64px 0 0;
  background:var(--ink);
  color:rgba(255,255,255,.62);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1fr;
  gap:36px;
  padding-bottom:50px;
}
.f-brand .brand{margin-bottom:18px}
.f-brand p{
  max-width:36ch;
  font-size:14px;
  line-height:1.9;
  color:rgba(255,255,255,.55);
}
.f-contact{font-variant-numeric:tabular-nums}
.f-col h4{
  margin-bottom:16px;
  font-family:var(--ff-sans);
  font-size:15px;
  font-weight:600;
  letter-spacing:.04em;
  color:#fff;
}
.f-col a{
  display:block;
  min-height:32px;
  padding:5px 0;
  font-size:14px;
  color:rgba(255,255,255,.58);
  transition:color .22s ease,transform .22s ease;
}
.f-col a:hover{color:#fff;transform:translateX(3px)}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:22px 0 30px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:12.5px;
  letter-spacing:.02em;
  color:rgba(255,255,255,.4);
}

/* ===== 入场动效 ===== */
.reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .62s cubic-bezier(.22,.61,.36,1),transform .62s cubic-bezier(.22,.61,.36,1);
}
.reveal.is-visible{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:1199.98px){
  .side-nav{flex-basis:200px;width:200px;padding:24px 16px 20px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:30px}
  .f-col:last-child{grid-column:1 / -1}
  .f-col:last-child a{display:inline-block;margin-right:22px}
}

@media (max-width:991.98px){
  .side-nav{display:none}
  .mobile-topbar{
    display:flex;
    align-items:center;
    justify-content:space-between;
    position:sticky;
    top:0;
    z-index:1030;
    height:60px;
    padding:0 18px;
    background:var(--paper);
    border-bottom:1px solid var(--line);
  }
  .reading-progress{z-index:1100}
  .wrap{max-width:100%;padding:0 20px}
  .breadcrumb-line{padding-top:26px}
  .post-cover{margin-top:28px}
  .prose{margin-top:34px;font-size:16.5px}
  .related{padding-top:64px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
  .cta-wrap{padding-top:64px}
  .cta-strip{padding:36px 28px}
  .site-footer{margin-top:72px;padding-top:52px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .f-brand{grid-column:1 / -1}
  .f-col:last-child{grid-column:1 / -1}
}

@media (max-width:767.98px){
  body{font-size:16px;line-height:1.8}
  .post-head h1{font-size:clamp(24px,6vw,32px)}
  .post-meta{gap:10px;font-size:13px;margin-top:20px;padding-bottom:20px}
  .post-meta .dot{display:none}
  .post-meta span{width:100%}
  .post-cover-frame{border-radius:var(--r-md)}
  .post-cover figcaption{font-size:12.5px}
  .prose{max-width:100%;font-size:16px;line-height:1.85;margin-top:30px}
  .prose h2{font-size:22px;padding-left:14px}
  .prose h2::before{height:22px}
  .prose h3{font-size:19px}
  .prose blockquote{padding:16px 18px;font-size:15.5px}
  .prose table{font-size:14.5px;display:block;overflow-x:auto;white-space:nowrap}
  .post-tags{max-width:100%;margin-top:34px;padding-top:22px}
  .post-back-row{max-width:100%}
  .related{padding-top:56px}
  .related-grid{grid-template-columns:1fr;gap:16px}
  .section-head{margin-bottom:22px;align-items:flex-start}
  .cta-wrap{padding-top:56px}
  .cta-strip{padding:30px 22px;border-radius:var(--r-md)}
  .cta-strip .btn-main{width:100%}
  .site-footer{margin-top:60px;padding-top:44px}
  .footer-grid{grid-template-columns:1fr;gap:26px;padding-bottom:36px}
  .f-col:last-child a{display:block;margin-right:0}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .empty-state{padding:38px 20px;margin-top:40px}
}

@media (max-width:519.98px){
  .wrap{padding:0 16px}
  .brand-sm .txt em{display:none}
  .post-head h1{font-size:24px}
  .badge-tag{font-size:12px;padding:5px 11px}
  .post-cover-frame img{aspect-ratio:4/3}
  .btn-main{width:100%}
}

/* roulang page: category2 */
:root{
  --paper:#F5F2EB;
  --ink:#16161A;
  --ink-2:#3A3A42;
  --muted:#7C7A74;
  --line:#E2DDD2;
  --accent:#C8452A;
  --accent-hover:#A8371F;
  --accent-soft:#FBEAE4;
  --jade:#1F5F52;
  --sand:#EDE6D8;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --shadow-sm:0 1px 2px rgba(22,22,26,.05),0 8px 24px -12px rgba(22,22,26,.12);
  --shadow-lg:0 20px 40px -20px rgba(22,22,26,.28);
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --serif:"Songti SC","Noto Serif SC","Source Han Serif SC","SimSun",serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;letter-spacing:.01em;line-height:1.15;margin:0;color:var(--ink)}
h2{font-size:clamp(24px,3vw,38px)}
h3{font-family:var(--sans);font-size:21px;line-height:1.4;font-weight:600}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
a{color:var(--jade);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--accent)}
img{max-width:100%;display:block}
ul,ol{margin:0;padding:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
::selection{background:var(--accent-soft);color:var(--accent-hover)}

.wrap{max-width:1040px;margin:0 auto;padding:0 24px}
.progress-top{position:fixed;top:0;left:0;height:2px;width:0;background:var(--accent);z-index:2000;transition:width .12s linear}

.shell{display:flex;min-height:100vh;align-items:stretch}
.main-col{flex:1;min-width:0;display:flex;flex-direction:column}

/* ---------- 左侧竖向导航 ---------- */
.side-nav{
  width:232px;flex:0 0 232px;
  position:sticky;top:0;height:100vh;
  background:var(--ink);
  color:#fff;
  padding:28px 18px 22px;
  display:flex;flex-direction:column;gap:24px;
  overflow-y:auto;scrollbar-width:none;
  z-index:1040;
}
.side-nav::-webkit-scrollbar{display:none}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:#fff}
.brand:hover{color:#fff}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:10px;
  background:var(--accent);color:#fff;
  display:grid;place-items:center;
  font-family:var(--serif);font-size:20px;font-weight:600;
}
.brand-text strong{display:block;font-family:var(--serif);font-size:17px;letter-spacing:.05em}
.brand-text em{display:block;font-style:normal;font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.5);margin-top:3px}

.side-nav-links{display:flex;flex-direction:column;gap:2px}
.side-nav-links .nav-link{
  display:block;position:relative;
  padding:13px 14px 13px 18px;
  border-radius:10px;
  color:rgba(255,255,255,.66);
  font-size:15.5px;line-height:1.4;
  text-decoration:none;
  transition:color .22s,background .22s;
}
.side-nav-links .nav-link::before{
  content:"";position:absolute;left:6px;top:50%;transform:translateY(-50%);
  width:3px;height:0;border-radius:2px;background:var(--accent);
  transition:height .24s ease;
}
.side-nav-links .nav-link:hover{color:#fff;background:rgba(255,255,255,.05)}
.side-nav-links .nav-link:hover::before{height:18px}
.side-nav-links .nav-link.active{color:#fff;background:rgba(255,255,255,.06)}
.side-nav-links .nav-link.active::before{height:22px}

.side-label{
  font-size:11px;letter-spacing:.16em;color:rgba(255,255,255,.36);
  margin:0 0 8px;padding-left:8px;text-transform:uppercase;
}
.side-cats{display:flex;flex-direction:column;gap:1px}
.side-cats a{
  display:flex;align-items:center;gap:8px;
  font-size:14px;color:rgba(255,255,255,.62);
  padding:8px;border-radius:8px;
  transition:color .2s,background .2s;
}
.side-cats a:hover{color:#fff;background:rgba(255,255,255,.05)}
.side-cats a.is-current{color:#fff}
.side-cats a.is-current::after{
  content:"";width:5px;height:5px;border-radius:50%;background:var(--accent);margin-left:auto;
}

.side-foot{
  margin-top:auto;padding-top:18px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-direction:column;gap:12px;
}
.side-foot .mini-btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:38px;padding:8px 14px;
  border:1.5px solid rgba(255,255,255,.32);border-radius:10px;
  color:#fff;font-size:13.5px;letter-spacing:.03em;
  transition:background .22s,color .22s,border-color .22s;
}
.side-foot .mini-btn:hover{background:#fff;color:var(--ink);border-color:#fff}
.side-foot p{font-size:11.5px;line-height:1.75;color:rgba(255,255,255,.42);margin:0}

/* ---------- 移动端顶栏 ---------- */
.topbar{display:none}
@media (max-width:991.98px){
  .side-nav{display:none}
  .topbar{
    display:flex;align-items:center;justify-content:space-between;
    height:60px;padding:0 18px;
    background:rgba(245,242,235,.96);
    backdrop-filter:blur(8px);
    border-bottom:1px solid var(--line);
    position:sticky;top:0;z-index:1030;
  }
  .topbar .brand-mark{width:32px;height:32px;flex:0 0 32px;font-size:17px;border-radius:9px}
  .topbar .brand-text strong{font-size:15px;color:var(--ink);font-family:var(--serif)}
  .topbar .brand-text em{font-size:10px;color:var(--muted);letter-spacing:.12em}
  .menu-btn{
    width:44px;height:44px;border:1px solid var(--line);border-radius:10px;
    background:#fff;display:grid;place-items:center;gap:0;
    padding:0;cursor:pointer;
  }
  .menu-btn span{display:block;width:18px;height:1.8px;background:var(--ink);border-radius:2px}
  .menu-btn span+span{margin-top:4px}
}
.drawer{background:var(--ink)!important;color:#fff;width:296px!important}
.drawer .offcanvas-header{padding:22px 20px 10px;border-bottom:1px solid rgba(255,255,255,.1)}
.drawer .offcanvas-title{color:#fff;font-family:var(--serif);font-size:16px;letter-spacing:.04em}
.drawer .btn-close{filter:invert(1) grayscale(1);opacity:.7}
.drawer .offcanvas-body{padding:18px 16px 28px;display:flex;flex-direction:column;gap:22px}
.drawer .side-nav-links .nav-link{font-size:16px;min-height:48px;display:flex;align-items:center}
.drawer .side-cats a{font-size:14.5px;min-height:44px}
.drawer .drawer-note{margin-top:auto;font-size:12px;line-height:1.8;color:rgba(255,255,255,.42)}

/* ---------- 页头 ---------- */
.page-head{background:var(--sand);border-top:2px solid var(--ink);padding:18px 0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);letter-spacing:.02em}
.crumb a{color:var(--ink-2)}
.crumb a:hover{color:var(--accent)}
.crumb .sep{color:var(--line)}
.crumb .now{color:var(--ink)}

/* ---------- 首屏：竖排大标题 + 长文 ---------- */
.intro{padding:64px 0 76px}
.intro-grid{display:grid;grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:56px;align-items:start}
.intro-title{position:sticky;top:28px}
.intro-title h1{
  font-family:var(--serif);
  font-size:clamp(30px,4vw,52px);
  line-height:1.16;
  letter-spacing:.01em;
  margin:18px 0 0;
}
.intro-title h1 em{
  display:block;font-style:normal;
  color:var(--accent);
  font-size:.66em;letter-spacing:.02em;margin-top:12px;
}
.intro-title .intro-note{
  margin-top:22px;font-size:14px;color:var(--muted);line-height:1.8;
  padding-left:14px;border-left:2px solid var(--line);
}
.tag{
  display:inline-flex;align-items:center;
  padding:5px 13px;border-radius:999px;
  background:rgba(31,95,82,.1);color:var(--jade);
  font-size:13px;letter-spacing:.06em;font-weight:600;
}
.intro-copy{max-width:640px}
.intro-copy .lead{font-size:17.5px;line-height:1.9;color:var(--ink-2)}
.intro-copy p{color:var(--ink-2)}
.head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}

/* 按钮 */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:13px 26px;
  border-radius:10px;border:1.5px solid transparent;
  font-size:15.5px;font-weight:600;letter-spacing:.02em;
  cursor:pointer;text-decoration:none;
  transition:background .22s,color .22s,border-color .22s,transform .22s,box-shadow .22s;
}
.btn-solid{background:var(--ink);color:#fff}
.btn-solid:hover{background:var(--accent-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.btn-onink{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-onink:hover{background:#fff;color:var(--ink);border-color:#fff;transform:translateY(-2px)}
.btn-x:active{transform:translateY(0)}

/* ---------- 时间线 ---------- */
.timeline{list-style:none;margin:34px 0 0;padding:0 0 0 30px;position:relative}
.timeline::before{content:"";position:absolute;left:7px;top:10px;bottom:14px;width:1px;background:var(--line)}
.timeline li{position:relative;padding-bottom:26px}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{
  content:"";position:absolute;left:-30px;top:8px;
  width:15px;height:15px;border-radius:50%;
  background:var(--paper);border:2px solid var(--accent);
}
.timeline h3{font-size:17px;display:flex;align-items:baseline;gap:10px;margin-bottom:6px}
.tl-num{
  font-variant-numeric:tabular-nums;
  font-size:13px;letter-spacing:.1em;font-weight:700;color:var(--accent);
  font-family:var(--sans);
}
.timeline p{font-size:15.5px;color:var(--muted);line-height:1.8;margin:0}

/* ---------- 通用板块 ---------- */
.section{padding:76px 0}
.section-head{max-width:720px;margin-bottom:40px}
.section-head h2{margin-bottom:14px}
.section-head p{color:var(--muted);font-size:16px}
.eyebrow{
  display:block;font-size:12.5px;letter-spacing:.18em;
  color:var(--accent);font-weight:700;margin-bottom:12px;
  font-family:var(--sans);text-transform:uppercase;
}

/* ---------- 步骤条 ---------- */
.steps-band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.steps{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.steps li{
  position:relative;background:var(--paper);
  border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px 22px;box-shadow:var(--shadow-sm);
  transition:transform .26s,box-shadow .26s,border-color .26s;
}
.steps li:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#d3ccbd}
.steps .num{
  display:block;font-variant-numeric:tabular-nums;
  font-size:13px;letter-spacing:.14em;font-weight:700;color:var(--accent);
}
.steps strong{display:block;font-family:var(--serif);font-size:18px;margin:10px 0 6px}
.steps em{display:block;font-style:normal;font-size:13.5px;color:var(--muted);line-height:1.65}
.steps li:not(:last-child)::after{
  content:"";position:absolute;right:-13px;top:50%;
  width:8px;height:8px;border-top:1.5px solid #cfc7b6;border-right:1.5px solid #cfc7b6;
  transform:translateY(-50%) rotate(45deg);
}

/* ---------- 图墙 ---------- */
.shots{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.shots figure{
  margin:0;position:relative;border-radius:var(--r-md);overflow:hidden;
  background:var(--sand);box-shadow:var(--shadow-sm);
}
.shots .ph{aspect-ratio:3/2;overflow:hidden}
.shots img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.shots figure:hover img{transform:scale(1.03)}
.shots figcaption{
  padding:14px 16px 16px;font-size:14px;color:var(--ink-2);
  background:#fff;border-top:1px solid var(--line);line-height:1.6;
}
.shots figcaption span{display:block;font-size:12.5px;color:var(--muted);letter-spacing:.04em;margin-top:3px}

/* ---------- 提示条 ---------- */
.notice{
  display:flex;gap:16px;
  background:#fff;border:1px solid var(--line);border-left:4px solid var(--accent);
  border-radius:var(--r-md);padding:22px 24px;
  box-shadow:var(--shadow-sm);
}
.notice .n-icon{
  flex:0 0 30px;width:30px;height:30px;border-radius:50%;
  background:var(--accent-soft);color:var(--accent);
  display:grid;place-items:center;font-weight:700;font-size:15px;
  font-family:var(--sans);
}
.notice p{font-size:15px;color:var(--ink-2);line-height:1.85;margin:0}
.notice strong{color:var(--ink)}

/* ---------- FAQ ---------- */
.faq{background:#fff;border-radius:var(--r-lg);border:1px solid var(--line);padding:8px 28px;box-shadow:var(--shadow-sm)}
.faq .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.faq .accordion-item:last-child{border-bottom:0}
.faq .accordion-button{
  background:transparent;box-shadow:none;
  color:var(--ink);font-size:17px;font-weight:600;
  padding:22px 44px 22px 0;
  display:flex;align-items:center;gap:14px;
  font-family:var(--sans);
}
.faq .accordion-button:not(.collapsed){background:transparent;color:var(--accent);box-shadow:none}
.faq .accordion-button:focus{box-shadow:none;outline:2px solid var(--accent);outline-offset:3px}
.faq .accordion-button .q-index{
  font-variant-numeric:tabular-nums;font-size:13px;font-weight:700;
  color:var(--muted);letter-spacing:.08em;flex:0 0 auto;
}
.faq .accordion-button:not(.collapsed) .q-index{color:var(--accent)}
.faq .accordion-button::after{
  background-image:none;
  content:"+";
  font-size:22px;line-height:1;font-weight:400;color:var(--ink);
  width:26px;height:26px;display:flex;align-items:center;justify-content:center;
  transform:none;transition:transform .3s ease,color .3s ease;
  margin-left:auto;
}
.faq .accordion-button:not(.collapsed)::after{background-image:none;transform:rotate(45deg);color:var(--accent)}
.faq .accordion-body{padding:0 44px 24px 0;font-size:15px;line-height:1.85;color:var(--muted)}

/* ---------- CTA ---------- */
.cta-band{position:relative;background:var(--ink);color:#fff;padding:76px 0;overflow:hidden}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  opacity:.14;
}
.cta-band .wrap{position:relative;z-index:1}
.cta-grid{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:40px;align-items:center}
.cta-band h2{color:#fff;max-width:560px}
.cta-band p{color:rgba(255,255,255,.7);font-size:15.5px;margin-top:16px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.68);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:36px}
.f-brand .brand{margin-bottom:18px}
.f-brand p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.55);max-width:340px}
.f-brand .f-contact{margin-top:16px;font-size:13px;color:rgba(255,255,255,.42);line-height:1.9}
.f-col h4{color:#fff;font-size:14px;letter-spacing:.08em;margin:0 0 16px;font-family:var(--sans);font-weight:600}
.f-col a{display:block;font-size:14px;color:rgba(255,255,255,.58);padding:6px 0;transition:color .2s,padding-left .2s}
.f-col a:hover{color:#fff;padding-left:4px}
.footer-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12.5px;color:rgba(255,255,255,.4);
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .62s cubic-bezier(.22,.61,.36,1),transform .62s cubic-bezier(.22,.61,.36,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .side-nav{width:200px;flex:0 0 200px}
  .intro-grid{gap:44px}
}
@media (max-width:991.98px){
  .section{padding:64px 0}
  .intro{padding:48px 0 60px}
  .steps{grid-template-columns:repeat(2,1fr);gap:16px}
  .steps li::after{display:none}
}
@media (max-width:860px){
  .intro-grid{grid-template-columns:1fr;gap:30px}
  .intro-title{position:static}
  .shots{grid-template-columns:1fr 1fr;gap:18px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .cta-grid{grid-template-columns:1fr;gap:26px}
}
@media (max-width:640px){
  body{font-size:16px;line-height:1.8}
  .wrap{padding:0 18px}
  .section{padding:56px 0}
  .intro{padding:40px 0 52px}
  .intro-copy .lead{font-size:16.5px}
  .shots{grid-template-columns:1fr}
  .faq{padding:6px 20px;border-radius:var(--r-md)}
  .faq .accordion-body{padding-right:8px}
  .cta-band{padding:56px 0}
  .cta-actions .btn-x{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;font-size:12px}
  .notice{flex-direction:column;gap:12px}
}
@media (max-width:520px){
  .steps{grid-template-columns:1fr}
  .head-actions .btn-x{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  .shots figure:hover img{transform:none}
}