/* roulang page: index */
:root{
  --c-primary:#C05B4D;
  --c-primary-dark:#A94A3E;
  --c-accent:#7B8B6B;
  --c-amber:#DFA34E;
  --c-bg:#FAF6F0;
  --c-bg-alt:#F2EBE1;
  --c-ink:#1C1917;
  --c-text:#221F1C;
  --c-muted:#6B6259;
  --c-line:#E6DCCE;
  --c-white:#FFFDFA;
  --r-card:16px;
  --r-sm:12px;
  --shadow:0 10px 28px rgba(28,25,23,.05);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-serif:"Optima","Georgia","Songti SC",serif;
  --bs-primary:#C05B4D;
  --bs-body-bg:#FAF6F0;
  --bs-body-color:#221F1C;
  --bs-border-radius:12px;
  --bs-font-sans-serif:var(--font-sans);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:var(--c-primary);text-decoration:none;transition:color .25s ease;}
a:hover{color:var(--c-primary-dark);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.15;letter-spacing:-.02em;font-weight:700;color:var(--c-text);}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ============ 按钮 ============ */
.yac-btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 30px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:background .25s ease,color .25s ease,border-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.yac-btn i{transition:transform .25s ease;font-size:13px;}
.yac-btn:hover i{transform:translateX(4px);}
.yac-btn-primary{background:var(--c-primary);color:#fff;border-color:var(--c-primary);}
.yac-btn-primary:hover{background:var(--c-primary-dark);border-color:var(--c-primary-dark);color:#fff;}
.yac-btn-primary:active{transform:translateY(1px);}
.yac-btn-outline{background:transparent;color:var(--c-primary);border-color:rgba(192,91,77,.45);}
.yac-btn-outline:hover{background:rgba(192,91,77,.08);color:var(--c-primary-dark);border-color:var(--c-primary);}
.yac-btn-ghost{background:#fff;color:var(--c-ink);border-color:#fff;}
.yac-btn-ghost:hover{background:#F7F2EA;color:var(--c-ink);}
.yac-btn-sm{padding:10px 20px;font-size:14px;}
.yac-btn-block{width:100%;justify-content:center;}

/* ============ 徽章 / 标签 ============ */
.yac-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;font-size:12px;font-weight:600;
  background:rgba(192,91,77,.08);color:var(--c-primary-dark);
}
.yac-badge--green{background:rgba(123,139,107,.12);color:#5D6B4F;}
.yac-badge--amber{background:rgba(223,163,78,.14);color:#8C6318;}
.yac-tagwall{display:flex;flex-wrap:wrap;gap:10px;}
.yac-tag{
  display:inline-block;padding:8px 16px;border-radius:999px;font-size:13px;
  background:#fff;border:1px solid var(--c-line);color:var(--c-muted);
  transition:color .25s ease,border-color .25s ease,background .25s ease;
}
.yac-tag:hover{color:var(--c-primary);border-color:rgba(192,91,77,.4);background:rgba(192,91,77,.04);}

/* ============ 头部导航 ============ */
.yac-header{position:relative;z-index:60;background:var(--c-white);border-bottom:1px solid var(--c-line);}
.yac-topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px;}
.yac-brand{display:inline-flex;align-items:center;gap:10px;color:var(--c-text);}
.yac-brand:hover{color:var(--c-text);}
.yac-brand-mark{
  width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--c-primary),#D4796B);color:#fff;
  font-size:19px;font-weight:700;
  box-shadow:0 6px 16px rgba(192,91,77,.24);
}
.yac-brand-text{display:flex;flex-direction:column;line-height:1.15;font-size:18px;font-weight:700;letter-spacing:-.01em;}
.yac-brand-text em{font-style:normal;font-size:11px;font-weight:500;letter-spacing:.16em;color:var(--c-muted);}
.yac-primary-nav{display:flex;align-items:center;gap:28px;margin-left:auto;}
.yac-primary-nav a{
  position:relative;font-size:15px;color:var(--c-text);padding:6px 0;
}
.yac-primary-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.yac-primary-nav a:hover{color:var(--c-primary);}
.yac-primary-nav a:hover::after,.yac-primary-nav a.is-active::after{transform:scaleX(1);}
.yac-primary-nav a.is-active{color:var(--c-primary);font-weight:600;}
.yac-actions{display:flex;align-items:center;gap:12px;}
.yac-burger{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);
  background:#fff;color:var(--c-text);font-size:17px;align-items:center;justify-content:center;
}
.yac-iconbar-wrap{background:var(--c-bg-alt);border-bottom:1px solid var(--c-line);}
.yac-iconbar{display:flex;align-items:stretch;gap:4px;overflow-x:auto;scrollbar-width:none;}
.yac-iconbar::-webkit-scrollbar{display:none;}
.yac-icon-item{
  flex:0 0 auto;display:flex;flex-direction:column;align-items:center;gap:6px;
  padding:14px 16px 12px;min-width:96px;border-radius:12px;
  font-size:13px;color:var(--c-muted);position:relative;
  transition:background .25s ease,color .25s ease;
}
.yac-icon-item i{font-size:20px;color:var(--c-primary);line-height:1;}
.yac-icon-item:hover,.yac-icon-item.is-active{background:rgba(192,91,77,.08);color:var(--c-primary);}
.yac-icon-item.is-active::after{
  content:"";position:absolute;bottom:4px;left:50%;transform:translateX(-50%);
  width:22px;height:2px;border-radius:2px;background:var(--c-primary);
}
.yac-drawer{
  display:none;position:fixed;inset:0;z-index:80;background:rgba(28,25,23,.45);
  opacity:0;pointer-events:none;transition:opacity .2s ease;
}
.yac-drawer.is-open{opacity:1;pointer-events:auto;}
.yac-drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(86vw,360px);
  background:var(--c-bg);padding:22px;overflow-y:auto;
  transform:translateX(100%);transition:transform .24s ease;
}
.yac-drawer.is-open .yac-drawer-panel{transform:translateX(0);}
.yac-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.yac-drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--c-line);background:#fff;color:var(--c-text);}
.yac-drawer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:22px;}
.yac-drawer-grid a{
  display:flex;flex-direction:column;align-items:center;gap:6px;padding:14px 4px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-sm);
  font-size:12px;color:var(--c-muted);text-align:center;
}
.yac-drawer-grid a i{font-size:18px;color:var(--c-primary);}
.yac-drawer-grid a:hover{border-color:rgba(192,91,77,.4);color:var(--c-primary);}

/* ============ 通用板块 ============ */
.yac-section{padding:96px 0;}
.yac-section--alt{background:var(--c-bg-alt);}
.yac-section--ink{background:var(--c-ink);color:#F7F2EA;}
.yac-section--ink h2,.yac-section--ink h3{color:#F7F2EA;}
.yac-section--line{border-top:1px solid var(--c-line);}
.yac-head{max-width:720px;margin-bottom:44px;}
.yac-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.yac-eyebrow{
  display:block;font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--c-primary);font-weight:700;margin-bottom:14px;
}
.yac-section--ink .yac-eyebrow{color:var(--c-amber);}
.yac-head h2{font-size:40px;margin-bottom:16px;}
.yac-head p{font-size:16px;color:var(--c-muted);margin:0;}
.yac-section--ink .yac-head p{color:rgba(247,242,234,.72);}
.yac-link-more{font-size:14px;font-weight:600;color:var(--c-primary);border-bottom:1px solid rgba(192,91,77,.4);padding-bottom:2px;}
.yac-link-more:hover{color:var(--c-primary-dark);border-color:var(--c-primary-dark);}

/* ============ Hero ============ */
.yac-hero{
  position:relative;padding:80px 0 88px;background:
    linear-gradient(180deg,rgba(250,246,240,.94),rgba(250,246,240,.98)),
    url('/assets/images/b8472a51cc3f27af.webp') center/cover no-repeat;
  overflow:hidden;
}
.yac-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(90deg,rgba(28,25,23,.045) 0 1px,transparent 1px 96px);
  opacity:.55;
}
.yac-hero .container{position:relative;z-index:2;}
.yac-hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:start;}
.yac-hero h1{font-size:56px;margin-bottom:22px;animation:yacRise .7s ease both;}
.yac-hero-sub{
  font-size:19px;font-weight:600;color:var(--c-primary-dark);margin-bottom:18px;
  animation:yacRise .7s ease .08s both;
}
.yac-hero-desc{
  font-size:16px;color:var(--c-muted);max-width:560px;margin-bottom:30px;
  animation:yacRise .7s ease .16s both;
}
.yac-hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;animation:yacRise .7s ease .24s both;}
.yac-hero-trust{display:flex;flex-wrap:wrap;gap:18px;font-size:13px;color:var(--c-muted);animation:yacRise .7s ease .3s both;}
.yac-hero-trust span{display:inline-flex;align-items:center;gap:7px;}
.yac-hero-trust i{color:var(--c-accent);}
@keyframes yacRise{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:translateY(0);}}
.yac-quick{
  background:rgba(255,253,250,.86);border:1px solid var(--c-line);border-radius:22px;
  padding:26px;box-shadow:var(--shadow);backdrop-filter:blur(2px);
  animation:yacRise .7s ease .18s both;
}
.yac-quick-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.yac-quick-title h2{font-size:17px;letter-spacing:0;}
.yac-quick-title span{font-size:12px;color:var(--c-muted);}
.yac-quick-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;}
.yac-quick-grid a{
  display:flex;align-items:center;gap:12px;padding:14px;border-radius:var(--r-sm);
  background:#fff;border:1px solid var(--c-line);color:var(--c-text);font-size:14px;font-weight:600;
  transition:border-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.yac-quick-grid a i{font-size:16px;color:var(--c-primary);}
.yac-quick-grid a:hover{border-color:rgba(192,91,77,.42);transform:translateY(-2px);box-shadow:0 8px 20px rgba(28,25,23,.06);color:var(--c-primary-dark);}
.yac-quick-foot{margin-top:18px;padding-top:16px;border-top:1px dashed var(--c-line);font-size:13px;color:var(--c-muted);}

/* ============ 数据看板 ============ */
.yac-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.yac-metric{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:28px 24px;box-shadow:var(--shadow);
  transition:border-color .3s ease,transform .3s ease;
}
.yac-metric:hover{border-color:rgba(192,91,77,.4);transform:translateY(-2px);}
.yac-metric-num{font-family:var(--font-serif);font-size:40px;font-weight:700;color:var(--c-primary);line-height:1;letter-spacing:-.01em;}
.yac-metric-num small{font-size:15px;font-weight:600;margin-left:4px;color:var(--c-muted);}
.yac-metric p{margin:12px 0 16px;font-size:14px;color:var(--c-muted);}
.yac-bar{height:3px;border-radius:3px;background:var(--c-bg-alt);overflow:hidden;}
.yac-bar i{display:block;height:100%;border-radius:3px;background:var(--c-primary);}
.yac-bar i.g{background:var(--c-accent);}
.yac-bar i.a{background:var(--c-amber);}

/* ============ 服务矩阵 ============ */
.yac-matrix{display:grid;grid-template-columns:repeat(12,1fr);gap:20px;}
.yac-mcard{
  grid-column:span 4;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:30px 28px;display:flex;flex-direction:column;gap:12px;
  transition:border-color .3s ease,transform .3s ease,box-shadow .3s ease;
}
.yac-mcard:hover{border-color:rgba(192,91,77,.4);transform:translateY(-2px);box-shadow:var(--shadow);}
.yac-mcard i.ico{font-size:20px;color:var(--c-primary);}
.yac-mcard h3{font-size:20px;}
.yac-mcard p{font-size:14px;color:var(--c-muted);margin:0;}
.yac-mcard .arrow{margin-top:auto;font-size:13px;color:var(--c-primary);font-weight:600;}
.yac-mcard--wide{grid-column:span 5;}
.yac-mcard--mid{grid-column:span 4;}
.yac-mcard--narrow{grid-column:span 3;background:var(--c-ink);border-color:var(--c-ink);}
.yac-mcard--narrow h3{color:#F7F2EA;}
.yac-mcard--narrow p{color:rgba(247,242,234,.72);}
.yac-mcard--narrow i.ico{color:var(--c-amber);}

/* ============ 结果对比 ============ */
.yac-compare{
  display:grid;grid-template-columns:1fr auto 1fr;gap:0;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow);
}
.yac-compare-col{padding:36px 32px;}
.yac-compare-col h3{font-size:20px;margin-bottom:8px;}
.yac-compare-col > span{display:block;font-size:13px;color:var(--c-muted);margin-bottom:22px;}
.yac-compare-col li{display:flex;gap:12px;font-size:14px;color:var(--c-muted);padding:11px 0;border-bottom:1px dashed var(--c-line);}
.yac-compare-col li:last-child{border-bottom:0;}
.yac-compare-col li i{margin-top:5px;font-size:13px;color:#BDB2A5;}
.yac-compare-col--right{background:rgba(123,139,107,.06);}
.yac-compare-col--right li{color:var(--c-text);}
.yac-compare-col--right li i{color:var(--c-accent);}
.yac-compare-divider{
  display:flex;align-items:center;justify-content:center;position:relative;
  background:var(--c-bg-alt);width:56px;
}
.yac-compare-divider::before{content:"";position:absolute;top:0;bottom:0;left:50%;width:1px;background:var(--c-line);}
.yac-compare-divider span{
  position:relative;z-index:2;width:38px;height:38px;border-radius:50%;
  background:#fff;border:1px solid var(--c-line);display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;color:var(--c-primary);
}
.yac-compare-note{margin-top:18px;font-size:13px;color:var(--c-muted);}

/* ============ 安全主张 ============ */
.yac-safety-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.yac-safety-media{
  position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--c-line);
  aspect-ratio:4/3;box-shadow:var(--shadow);
}
.yac-safety-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.yac-safety-media:hover img{transform:scale(1.03);}
.yac-safety-media figcaption{
  position:absolute;left:16px;bottom:16px;right:16px;
  background:rgba(255,253,250,.92);border-radius:12px;padding:12px 16px;font-size:13px;color:var(--c-text);
}
.yac-safety-list li{display:flex;gap:16px;padding:16px 0;border-bottom:1px solid var(--c-line);}
.yac-safety-list li:last-child{border-bottom:0;}
.yac-safety-list i{
  flex:0 0 auto;width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:rgba(123,139,107,.12);color:#5D6B4F;font-size:15px;
}
.yac-safety-list h3{font-size:16px;margin-bottom:4px;}
.yac-safety-list p{font-size:14px;color:var(--c-muted);margin:0;}

/* ============ 检查项 ============ */
.yac-checks{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;}
.yac-check{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:24px 20px;
  transition:border-color .3s ease,transform .3s ease;
}
.yac-check:hover{border-color:rgba(192,91,77,.4);transform:translateY(-2px);}
.yac-check .no{font-family:var(--font-serif);font-size:24px;color:var(--c-primary);line-height:1;margin-bottom:14px;}
.yac-check h3{font-size:16px;margin-bottom:8px;}
.yac-check p{font-size:13px;color:var(--c-muted);margin:0;}

/* ============ 合规徽章条 ============ */
.yac-badges{display:grid;grid-template-columns:repeat(5,1fr);gap:0;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;}
.yac-badge-cell{padding:26px 22px;border-right:1px solid var(--c-line);}
.yac-badge-cell:last-child{border-right:0;}
.yac-badge-cell i{font-size:18px;color:var(--c-accent);margin-bottom:10px;display:block;}
.yac-badge-cell h3{font-size:15px;margin-bottom:6px;}
.yac-badge-cell p{font-size:13px;color:var(--c-muted);margin:0;}

/* ============ 边界说明 ============ */
.yac-boundary{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.yac-boundary-card{
  border-radius:var(--r-card);padding:32px;border:1px solid var(--c-line);background:#fff;
}
.yac-boundary-card--warn{background:rgba(192,91,77,.05);border-color:rgba(192,91,77,.22);}
.yac-boundary-card h3{font-size:20px;margin-bottom:16px;display:flex;align-items:center;gap:10px;}
.yac-boundary-card h3 i{font-size:16px;color:var(--c-primary);}
.yac-boundary-card li{position:relative;padding-left:22px;font-size:14px;color:var(--c-muted);margin-bottom:12px;}
.yac-boundary-card li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;background:var(--c-accent);}
.yac-boundary-card--warn li::before{background:var(--c-primary);}

/* ============ 节奏时间轴（深色） ============ */
.yac-timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:8px;}
.yac-node{position:relative;padding-top:34px;}
.yac-node::before{content:"";position:absolute;top:9px;left:0;right:0;height:1px;background:rgba(247,242,234,.2);}
.yac-node::after{
  content:"";position:absolute;top:4px;left:0;width:11px;height:11px;border-radius:50%;
  background:var(--c-primary);box-shadow:0 0 0 4px rgba(192,91,77,.18);
}
.yac-node .yr{font-family:var(--font-serif);font-size:15px;letter-spacing:.06em;color:var(--c-amber);display:block;margin-bottom:10px;}
.yac-node h3{font-size:18px;margin-bottom:8px;}
.yac-node p{font-size:14px;color:rgba(247,242,234,.7);margin:0;}
.yac-timeline-foot{margin-top:36px;padding-top:22px;border-top:1px solid rgba(247,242,234,.14);font-size:14px;color:rgba(247,242,234,.66);}

/* ============ 专题卡 ============ */
.yac-topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.yac-topic{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
  display:flex;flex-direction:column;
  transition:border-color .3s ease,transform .3s ease,box-shadow .3s ease;
}
.yac-topic:hover{border-color:rgba(192,91,77,.4);transform:translateY(-2px);box-shadow:var(--shadow);}
.yac-topic-img{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--c-bg-alt);}
.yac-topic-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.yac-topic:hover .yac-topic-img img{transform:scale(1.03);}
.yac-topic-img .yac-badge{position:absolute;left:12px;top:12px;background:rgba(255,253,250,.92);color:var(--c-primary-dark);}
.yac-topic-body{padding:20px;display:flex;flex-direction:column;gap:8px;flex:1;}
.yac-topic-body h3{font-size:17px;}
.yac-topic-body p{font-size:13px;color:var(--c-muted);margin:0;}
.yac-topic-body .meta{margin-top:auto;font-size:12px;color:#9B9187;}

/* ============ 圈子 ============ */
.yac-circles{display:grid;grid-template-columns:.85fr 1.15fr;gap:56px;align-items:start;}
.yac-circle-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:32px;}
.yac-circle-card{background:rgba(192,91,77,.05);border:1px solid rgba(192,91,77,.18);border-radius:var(--r-card);padding:22px 20px;}
.yac-circle-card i{font-size:18px;color:var(--c-primary);margin-bottom:10px;display:block;}
.yac-circle-card h3{font-size:16px;margin-bottom:6px;}
.yac-circle-card p{font-size:13px;color:var(--c-muted);margin:0;}

/* ============ 资讯列表 ============ */
.yac-news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap;}
.yac-news{display:grid;grid-template-columns:1fr;gap:0;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow);}
.yac-news-item{display:grid;grid-template-columns:150px 1fr;gap:22px;padding:22px 26px;border-bottom:1px solid var(--c-line);align-items:center;transition:background .25s ease;}
.yac-news-item:last-child{border-bottom:0;}
.yac-news-item:hover{background:rgba(242,235,225,.55);}
.yac-news-thumb{aspect-ratio:16/10;border-radius:var(--r-sm);overflow:hidden;background:var(--c-bg-alt);border:1px solid var(--c-line);}
.yac-news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.yac-news-item:hover .yac-news-thumb img{transform:scale(1.03);}
.yac-news-body .yac-badge{margin-bottom:8px;}
.yac-news-body h3{font-size:17px;margin-bottom:6px;}
.yac-news-body h3 a{color:var(--c-text);}
.yac-news-body h3 a:hover{color:var(--c-primary);}
.yac-news-body p{
  font-size:13px;color:var(--c-muted);margin:0 0 8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.yac-news-meta{font-size:12px;color:#9B9187;display:flex;gap:14px;flex-wrap:wrap;}
.yac-empty{
  padding:56px 26px;text-align:center;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
}
.yac-empty i{font-size:26px;color:var(--c-primary);margin-bottom:14px;display:block;}
.yac-empty p{font-size:14px;color:var(--c-muted);margin-bottom:18px;}

/* ============ 平台保障四宫格 ============ */
.yac-guard{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--c-line);border-left:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;background:#fff;}
.yac-guard-cell{padding:32px 26px;border-right:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.yac-guard-cell i{font-size:20px;color:var(--c-primary);margin-bottom:14px;display:block;}
.yac-guard-cell h3{font-size:17px;margin-bottom:8px;}
.yac-guard-cell p{font-size:13px;color:var(--c-muted);margin:0;}
.yac-guard-note{
  margin-top:24px;padding:16px 22px;border-radius:999px;background:rgba(192,91,77,.08);
  color:var(--c-primary-dark);font-size:14px;display:flex;align-items:center;gap:10px;
}

/* ============ 快速解答 ============ */
.yac-fast{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.yac-fast-item{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:22px 20px;}
.yac-fast-item h3{font-size:13px;color:var(--c-primary);font-weight:700;margin-bottom:8px;}
.yac-fast-item p{font-size:13px;color:var(--c-muted);margin:0;}

/* ============ FAQ ============ */
.yac-faq{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start;}
.yac-accordion .accordion-item{
  background:transparent;border:0;border-bottom:1px solid var(--c-line);
}
.yac-accordion .accordion-button{
  background:transparent;color:var(--c-text);font-size:16px;font-weight:600;
  padding:20px 46px 20px 0;box-shadow:none;border-radius:0;
}
.yac-accordion .accordion-button:not(.collapsed){color:var(--c-primary);background:transparent;box-shadow:none;}
.yac-accordion .accordion-button::after{
  content:"\2b";font-family:var(--font-sans);font-size:18px;font-weight:400;color:var(--c-primary);
  background-image:none;width:auto;height:auto;transform:none;line-height:1;position:absolute;right:6px;
}
.yac-accordion .accordion-button:not(.collapsed)::after{content:"\2212";}
.yac-accordion .accordion-button:focus{box-shadow:none;border-color:transparent;}
.yac-accordion .accordion-body{padding:0 40px 22px 0;font-size:14px;color:var(--c-muted);line-height:1.8;}

/* ============ 参与阶梯 ============ */
.yac-tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch;}
.yac-tier{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:32px 28px;display:flex;flex-direction:column;}
.yac-tier--feature{background:var(--c-ink);border-color:var(--c-ink);transform:translateY(-8px);}
.yac-tier--feature h3,.yac-tier--feature .price{color:#F7F2EA;}
.yac-tier--feature li{color:rgba(247,242,234,.76);}
.yac-tier--feature .yac-badge{background:rgba(223,163,78,.18);color:var(--c-amber);}
.yac-tier h3{font-size:20px;margin-bottom:6px;}
.yac-tier .price{font-family:var(--font-serif);font-size:15px;color:var(--c-muted);margin-bottom:20px;display:block;}
.yac-tier li{font-size:14px;color:var(--c-muted);padding:8px 0;display:flex;gap:10px;}
.yac-tier li i{color:var(--c-accent);font-size:12px;margin-top:7px;}
.yac-tier .yac-btn{margin-top:auto;}
.yac-tier--feature li i{color:var(--c-amber);}

/* ============ 社区公约 ============ */
.yac-pact{display:grid;grid-template-columns:1.25fr .75fr;gap:56px;align-items:center;}
.yac-pact ol{counter-reset:pact;margin-top:8px;}
.yac-pact li{
  counter-increment:pact;position:relative;padding:18px 0 18px 62px;border-bottom:1px solid var(--c-line);
  font-size:15px;color:var(--c-text);
}
.yac-pact li:last-child{border-bottom:0;}
.yac-pact li::before{
  content:counter(pact,decimal-leading-zero);position:absolute;left:0;top:14px;
  font-family:var(--font-serif);font-size:26px;color:var(--c-primary);line-height:1;
}
.yac-pact li small{display:block;font-size:13px;color:var(--c-muted);margin-top:4px;}
.yac-pact-media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--c-line);aspect-ratio:1/1;box-shadow:var(--shadow);}
.yac-pact-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.yac-pact-media:hover img{transform:scale(1.03);}

/* ============ 下载区 ============ */
.yac-download{background:var(--c-bg-alt);}
.yac-download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.yac-dl-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:32px 28px;
  display:flex;flex-direction:column;gap:10px;
  transition:border-color .3s ease,transform .3s ease,box-shadow .3s ease;
}
.yac-dl-card:hover{border-color:rgba(192,91,77,.4);transform:translateY(-2px);box-shadow:var(--shadow);}
.yac-dl-card i.os{font-size:24px;color:var(--c-primary);}
.yac-dl-card h3{font-size:19px;}
.yac-dl-card p{font-size:13px;color:var(--c-muted);margin:0 0 10px;}
.yac-dl-card .yac-btn{margin-top:auto;}
.yac-dl-note{margin-top:24px;font-size:13px;color:var(--c-muted);}

/* ============ 转化表单 ============ */
.yac-join{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;}
.yac-join-points li{display:flex;gap:12px;font-size:14px;color:rgba(247,242,234,.78);margin-bottom:14px;}
.yac-join-points i{color:var(--c-amber);margin-top:6px;font-size:12px;}
.yac-form{background:rgba(255,253,250,.06);border:1px solid rgba(247,242,234,.16);border-radius:var(--r-card);padding:32px;}
.yac-form .form-label{font-size:13px;color:rgba(247,242,234,.72);margin-bottom:6px;}
.yac-form .form-control,.yac-form .form-select{
  height:48px;border-radius:12px;border:1px solid rgba(247,242,234,.2);
  background:rgba(255,253,250,.06);color:#F7F2EA;font-size:14px;padding:0 14px;
  transition:border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.yac-form .form-select{color-scheme:dark;}
.yac-form .form-control::placeholder{color:rgba(247,242,234,.4);}
.yac-form .form-control:focus,.yac-form .form-select:focus{
  border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(192,91,77,.18);background:rgba(255,253,250,.1);color:#fff;
}
.yac-form .form-check-label{font-size:13px;color:rgba(247,242,234,.66);}
.yac-form .form-check-input{background-color:transparent;border-color:rgba(247,242,234,.35);}
.yac-form .form-check-input:checked{background-color:var(--c-primary);border-color:var(--c-primary);}
.yac-form-tip{font-size:12px;color:rgba(247,242,234,.5);margin-top:14px;}
.yac-form .mb-3{margin-bottom:16px !important;}

/* ============ 尾部 CTA 细带 ============ */
.yac-cta-band{
  background:rgba(192,91,77,.08);border-top:1px solid rgba(192,91,77,.16);border-bottom:1px solid rgba(192,91,77,.16);
}
.yac-cta-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:120px;flex-wrap:wrap;padding:24px 0;}
.yac-cta-inner h2{font-size:24px;margin:0;}
.yac-cta-inner p{font-size:14px;color:var(--c-muted);margin:6px 0 0;}

/* ============ 页脚 ============ */
.yac-footer{background:var(--c-ink);color:rgba(247,242,234,.7);padding:72px 0 0;font-size:14px;}
.yac-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.yac-footer h3{font-size:14px;letter-spacing:.14em;text-transform:uppercase;color:#F7F2EA;margin-bottom:18px;font-weight:700;}
.yac-footer .yac-brand-text{color:#F7F2EA;font-size:17px;}
.yac-footer .yac-brand-text em{color:rgba(247,242,234,.5);}
.yac-footer p{font-size:13px;line-height:1.9;color:rgba(247,242,234,.6);}
.yac-footer li{margin-bottom:10px;}
.yac-footer li a{color:rgba(247,242,234,.72);font-size:13px;}
.yac-footer li a:hover{color:#fff;}
.yac-footer li i{width:18px;color:var(--c-amber);font-size:12px;margin-right:6px;}
.yac-footer-bottom{
  margin-top:52px;border-top:1px solid rgba(247,242,234,.12);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12px;color:rgba(247,242,234,.45);
}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .yac-hero h1{font-size:46px;}
  .yac-head h2{font-size:34px;}
  .yac-topic-grid{grid-template-columns:repeat(2,1fr);}
  .yac-checks{grid-template-columns:repeat(3,1fr);}
  .yac-fast{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991.98px){
  .yac-primary-nav{display:none;}
  .yac-burger{display:flex;}
  .yac-actions .yac-btn{display:none;}
  .yac-drawer{display:block;}
  .yac-section{padding:64px 0;}
  .yac-hero{padding:56px 0 64px;}
  .yac-hero-grid{grid-template-columns:1fr;gap:36px;}
  .yac-hero h1{font-size:38px;}
  .yac-metrics{grid-template-columns:repeat(2,1fr);}
  .yac-matrix .yac-mcard,
  .yac-matrix .yac-mcard--wide,
  .yac-matrix .yac-mcard--mid,
  .yac-matrix .yac-mcard--narrow{grid-column:span 6;}
  .yac-matrix .yac-mcard--narrow{grid-column:span 12;}
  .yac-compare{grid-template-columns:1fr;}
  .yac-compare-divider{width:100%;height:44px;}
  .yac-compare-divider::before{top:50%;left:0;right:0;bottom:auto;width:auto;height:1px;}
  .yac-safety-grid,.yac-circles,.yac-faq,.yac-pact,.yac-join{grid-template-columns:1fr;gap:36px;}
  .yac-badges{grid-template-columns:repeat(2,1fr);}
  .yac-badge-cell{border-right:0;border-bottom:1px solid var(--c-line);}
  .yac-boundary{grid-template-columns:1fr;}
  .yac-timeline{grid-template-columns:repeat(2,1fr);gap:32px;}
  .yac-guard{grid-template-columns:repeat(2,1fr);}
  .yac-tiers{grid-template-columns:1fr;}
  .yac-tier--feature{transform:none;}
  .yac-download-grid{grid-template-columns:1fr;}
  .yac-footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .yac-circle-cards{grid-template-columns:repeat(3,1fr);}
}
@media (max-width:767.98px){
  .container{padding:0 18px;}
  .yac-hero h1{font-size:32px;}
  .yac-hero-sub{font-size:17px;}
  .yac-head h2{font-size:26px;}
  .yac-section{padding:52px 0;}
  .yac-metrics{grid-template-columns:1fr 1fr;gap:16px;}
  .yac-metric{padding:22px 18px;}
  .yac-metric-num{font-size:32px;}
  .yac-quick-grid{grid-template-columns:1fr;}
  .yac-topic-grid{grid-template-columns:1fr;}
  .yac-checks{grid-template-columns:1fr 1fr;}
  .yac-fast{grid-template-columns:1fr;}
  .yac-badges{grid-template-columns:1fr;}
  .yac-timeline{grid-template-columns:1fr;}
  .yac-node{padding-top:26px;padding-left:26px;}
  .yac-node::before{top:0;bottom:0;left:5px;right:auto;width:1px;height:auto;}
  .yac-node::after{top:4px;left:0;}
  .yac-guard{grid-template-columns:1fr;}
  .yac-news-item{grid-template-columns:1fr;gap:14px;}
  .yac-news-thumb{aspect-ratio:16/9;}
  .yac-circle-cards{grid-template-columns:1fr;}
  .yac-footer-grid{grid-template-columns:1fr;}
  .yac-cta-inner h2{font-size:20px;}
  .yac-form{padding:24px 20px;}
  .yac-icon-item{min-width:82px;padding:12px 12px 10px;font-size:12px;}
}
@media (max-width:519.98px){
  .yac-hero h1{font-size:28px;}
  .yac-hero-btns .yac-btn{width:100%;justify-content:center;}
  .yac-checks{grid-template-columns:1fr;}
  .yac-metrics{grid-template-columns:1fr;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
}

/* roulang page: article */
:root{
  --c-primary:#C05B4D;
  --c-primary-dark:#A94A3E;
  --c-accent:#7B8B6B;
  --c-amber:#DFA34E;
  --c-bg:#FAF6F0;
  --c-bg-alt:#F2EBE1;
  --c-ink:#1C1917;
  --c-text:#221F1C;
  --c-muted:#6B6259;
  --c-line:#E6DCCE;
  --c-white:#FFFDFA;
  --r-card:16px;
  --r-sm:12px;
  --shadow:0 10px 28px rgba(28,25,23,.05);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-serif:"Optima","Georgia","Songti SC",serif;
  --bs-primary:#C05B4D;
  --bs-body-bg:#FAF6F0;
  --bs-body-color:#221F1C;
  --bs-border-radius:12px;
  --bs-font-sans-serif:var(--font-sans);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:var(--c-primary);text-decoration:none;transition:color .25s ease,border-color .25s ease;}
a:hover{color:var(--c-primary-dark);}
ul,ol{margin:0;padding:0;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;letter-spacing:-.02em;color:var(--c-text);}
p{margin:0;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ============ 按钮 ============ */
.yac-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:background .25s ease,color .25s ease,border-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.yac-btn i{transition:transform .25s ease;font-size:13px;}
.yac-btn:hover i{transform:translateX(4px);}
.yac-btn-primary{background:var(--c-primary);color:#fff;border-color:var(--c-primary);}
.yac-btn-primary:hover{background:var(--c-primary-dark);border-color:var(--c-primary-dark);color:#fff;}
.yac-btn-primary:active{transform:translateY(1px);}
.yac-btn-outline{background:transparent;color:var(--c-primary);border-color:rgba(192,91,77,.45);}
.yac-btn-outline:hover{background:rgba(192,91,77,.08);color:var(--c-primary-dark);border-color:var(--c-primary);}
.yac-btn-ghost{background:#fff;color:var(--c-ink);border-color:#fff;}
.yac-btn-ghost:hover{background:#F7F2EA;color:var(--c-ink);}
.yac-btn-sm{padding:10px 20px;font-size:14px;}
.yac-btn-block{width:100%;}
.yac-btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--c-primary);outline-offset:2px;
}

/* ============ 徽章 / 标签 ============ */
.yac-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;font-size:12px;font-weight:600;
  background:rgba(192,91,77,.08);color:var(--c-primary-dark);
}
.yac-badge--green{background:rgba(123,139,107,.12);color:#5D6B4F;}
.yac-badge--amber{background:rgba(223,163,78,.14);color:#8C6318;}
.yac-tagwall{display:flex;flex-wrap:wrap;gap:10px;}
.yac-tag{
  display:inline-block;padding:8px 16px;border-radius:999px;font-size:13px;
  background:#fff;border:1px solid var(--c-line);color:var(--c-muted);
  transition:color .25s ease,border-color .25s ease,background .25s ease;
}
.yac-tag:hover{color:var(--c-primary);border-color:rgba(192,91,77,.4);background:rgba(192,91,77,.04);}

/* ============ 头部导航 ============ */
.yac-header{position:relative;z-index:60;background:var(--c-white);border-bottom:1px solid var(--c-line);}
.yac-topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px;}
.yac-brand{display:inline-flex;align-items:center;gap:10px;color:var(--c-text);}
.yac-brand:hover{color:var(--c-text);}
.yac-brand-mark{
  width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--c-primary),#D4796B);color:#fff;
  font-size:19px;font-weight:700;box-shadow:0 6px 16px rgba(192,91,77,.24);
}
.yac-brand-text{display:flex;flex-direction:column;line-height:1.15;font-size:18px;font-weight:700;letter-spacing:-.01em;}
.yac-brand-text em{font-style:normal;font-size:11px;font-weight:500;letter-spacing:.16em;color:var(--c-muted);}
.yac-primary-nav{display:flex;align-items:center;gap:28px;margin-left:auto;}
.yac-primary-nav a{position:relative;font-size:15px;color:var(--c-text);padding:6px 0;}
.yac-primary-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.yac-primary-nav a:hover{color:var(--c-primary);}
.yac-primary-nav a:hover::after,.yac-primary-nav a.is-active::after{transform:scaleX(1);}
.yac-primary-nav a.is-active{color:var(--c-primary);font-weight:600;}
.yac-actions{display:flex;align-items:center;gap:14px;}
.yac-burger{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);
  background:#fff;color:var(--c-text);font-size:17px;cursor:pointer;
  transition:border-color .25s ease,color .25s ease;
}
.yac-burger:hover{border-color:rgba(192,91,77,.45);color:var(--c-primary);}
.yac-iconbar-wrap{border-top:1px solid var(--c-line);background:var(--c-white);}
.yac-iconbar{
  display:flex;align-items:center;gap:4px;overflow-x:auto;padding:4px 0;
  scrollbar-width:none;
}
.yac-iconbar::-webkit-scrollbar{display:none;}
.yac-icon-item{
  flex:0 0 auto;display:flex;flex-direction:column;align-items:center;gap:6px;
  padding:14px 16px 12px;min-width:96px;border-radius:12px;
  font-size:13px;color:var(--c-muted);position:relative;text-align:center;
  transition:background .25s ease,color .25s ease;
}
.yac-icon-item i{font-size:20px;color:var(--c-primary);line-height:1;}
.yac-icon-item:hover,.yac-icon-item.is-active{background:rgba(192,91,77,.08);color:var(--c-primary);}
.yac-icon-item.is-active::after{
  content:"";position:absolute;bottom:4px;left:50%;transform:translateX(-50%);
  width:22px;height:2px;border-radius:2px;background:var(--c-primary);
}
.yac-drawer{
  display:none;position:fixed;inset:0;z-index:80;background:rgba(28,25,23,.45);
  opacity:0;pointer-events:none;transition:opacity .2s ease;
}
.yac-drawer.is-open{opacity:1;pointer-events:auto;}
.yac-drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(86vw,360px);
  background:var(--c-bg);padding:22px;overflow-y:auto;
  transform:translateX(100%);transition:transform .24s ease;
}
.yac-drawer.is-open .yac-drawer-panel{transform:translateX(0);}
.yac-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.yac-drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--c-line);background:#fff;color:var(--c-text);cursor:pointer;}
.yac-drawer-close:hover{color:var(--c-primary);border-color:rgba(192,91,77,.45);}
.yac-drawer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:22px;}
.yac-drawer-grid a{
  display:flex;flex-direction:column;align-items:center;gap:6px;padding:14px 4px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-sm);
  font-size:12px;color:var(--c-muted);text-align:center;
}
.yac-drawer-grid a i{font-size:18px;color:var(--c-primary);}
.yac-drawer-grid a:hover{border-color:rgba(192,91,77,.4);color:var(--c-primary);}

/* ============ 通用板块 ============ */
.yac-section{padding:96px 0;}
.yac-section--alt{background:var(--c-bg-alt);}
.yac-section--tight{padding:72px 0;}
.yac-eyebrow{
  display:block;font-size:12px;font-weight:600;letter-spacing:.18em;
  color:var(--c-primary);text-transform:uppercase;margin-bottom:14px;
}
.yac-section-head{max-width:720px;margin-bottom:44px;}
.yac-section-head h2{font-size:36px;line-height:1.25;}
.yac-section-head p{margin-top:14px;color:var(--c-muted);font-size:15.5px;}

/* ============ 文章头部 ============ */
.yac-art-hero{padding:48px 0 44px;background:var(--c-bg-alt);border-bottom:1px solid var(--c-line);}
.yac-crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:18px;}
.yac-crumbs a{color:var(--c-muted);}
.yac-crumbs a:hover{color:var(--c-primary);}
.yac-crumbs i{font-size:10px;opacity:.6;}
.yac-art-hero h1{
  font-size:44px;line-height:1.24;letter-spacing:-.025em;max-width:900px;margin:16px 0 16px;
}
.yac-art-lead{max-width:780px;color:var(--c-muted);font-size:16.5px;line-height:1.8;}
.yac-art-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px 22px;margin-top:24px;
  font-size:13px;color:var(--c-muted);
}
.yac-art-meta-item{display:inline-flex;align-items:center;gap:7px;}
.yac-art-meta-item i{color:var(--c-primary);font-size:13px;}

/* ============ 正文区 ============ */
.yac-article-main{padding:72px 0 88px;}
.yac-article-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start;}
.yac-article-body{max-width:760px;font-size:16.5px;line-height:1.9;color:var(--c-text);}
.yac-article-body > * + *{margin-top:20px;}
.yac-article-body p{margin:0;}
.yac-article-body h2{
  font-size:26px;line-height:1.4;margin-top:42px;padding-left:14px;
  border-left:3px solid var(--c-primary);
}
.yac-article-body h3{font-size:20px;line-height:1.5;margin-top:32px;}
.yac-article-body h4{font-size:17px;margin-top:26px;}
.yac-article-body ul,.yac-article-body ol{padding-left:22px;margin:20px 0;}
.yac-article-body ul{list-style:none;padding-left:4px;}
.yac-article-body ul > li{position:relative;padding-left:20px;margin-bottom:10px;}
.yac-article-body ul > li::before{
  content:"";position:absolute;left:0;top:12px;width:7px;height:7px;border-radius:50%;
  background:rgba(192,91,77,.55);
}
.yac-article-body ol > li{margin-bottom:10px;}
.yac-article-body blockquote{
  margin:28px 0;padding:18px 24px;border-left:3px solid var(--c-primary);
  background:var(--c-bg-alt);border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--c-text);
}
.yac-article-body blockquote p + p{margin-top:12px;}
.yac-article-body img{border-radius:12px;margin:28px 0;width:100%;}
.yac-article-body figure{margin:28px 0;}
.yac-article-body figcaption{font-size:13px;color:var(--c-muted);text-align:center;margin-top:10px;}
.yac-article-body a{color:var(--c-primary);border-bottom:1px solid rgba(192,91,77,.35);}
.yac-article-body a:hover{border-bottom-color:var(--c-primary);}
.yac-article-body strong{font-weight:700;}
.yac-article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;}
.yac-article-body th,.yac-article-body td{border:1px solid var(--c-line);padding:10px 14px;text-align:left;}
.yac-article-body th{background:var(--c-bg-alt);font-weight:600;}
.yac-empty{
  text-align:center;padding:64px 24px;background:#fff;
  border:1px dashed var(--c-line);border-radius:var(--r-card);box-shadow:var(--shadow);
}
.yac-empty i{font-size:34px;color:var(--c-primary);margin-bottom:16px;display:block;}
.yac-empty h2{font-size:22px;margin-bottom:10px;}
.yac-empty p{color:var(--c-muted);margin-bottom:22px;}

/* ============ 侧栏 ============ */
.yac-aside{display:grid;gap:20px;position:sticky;top:24px;}
.yac-mini{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--shadow);
}
.yac-mini h3{font-size:15px;margin-bottom:14px;letter-spacing:0;}
.yac-mini-list{list-style:none;display:grid;gap:12px;font-size:13.5px;color:var(--c-muted);}
.yac-mini-list li{display:flex;align-items:flex-start;gap:9px;line-height:1.6;}
.yac-mini-list i{color:var(--c-accent);font-size:12px;margin-top:5px;}
.yac-mini-meta{display:flex;justify-content:space-between;gap:10px;font-size:13px;color:var(--c-muted);padding:7px 0;border-bottom:1px dashed var(--c-line);}
.yac-mini-meta:last-child{border-bottom:0;}
.yac-mini-meta span:last-child{color:var(--c-text);font-weight:600;}
.yac-mini p{font-size:13.5px;color:var(--c-muted);line-height:1.75;margin-bottom:16px;}

/* ============ 要点 ============ */
.yac-takeaways{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.yac-takeaway{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--shadow);transition:transform .3s ease,border-color .3s ease;
}
.yac-takeaway:hover{transform:translateY(-2px);border-color:rgba(192,91,77,.4);}
.yac-takeaway-num{
  font-family:var(--font-serif);font-size:32px;line-height:1;color:var(--c-primary);margin-bottom:14px;
}
.yac-takeaway h3{font-size:17px;margin-bottom:8px;}
.yac-takeaway p{font-size:14px;color:var(--c-muted);line-height:1.75;}
.yac-tagrow{margin-top:36px;display:flex;flex-wrap:wrap;gap:10px;}

/* ============ 公约 ============ */
.yac-rules{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
}
.yac-rule{padding:28px 24px;border-right:1px solid var(--c-line);}
.yac-rule:last-child{border-right:0;}
.yac-rule i{font-size:20px;color:var(--c-primary);margin-bottom:14px;display:block;}
.yac-rule h3{font-size:16px;margin-bottom:8px;}
.yac-rule p{font-size:13.5px;color:var(--c-muted);line-height:1.75;}

/* ============ 频道入口 ============ */
.yac-channels{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start;}
.yac-channel-figure{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--c-line);
  background:var(--c-bg-alt);box-shadow:var(--shadow);
}
.yac-channel-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s ease;}
.yac-channel-figure:hover img{transform:scale(1.03);}
.yac-channel-figure figcaption{padding:14px 18px;font-size:13px;color:var(--c-muted);background:#fff;}
.yac-channel-list{display:grid;gap:16px;}
.yac-channel{
  display:flex;align-items:flex-start;gap:16px;padding:22px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  color:var(--c-text);transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.yac-channel:hover{transform:translateY(-2px);border-color:rgba(192,91,77,.4);box-shadow:var(--shadow);color:var(--c-text);}
.yac-channel-icon{
  flex:0 0 auto;width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(192,91,77,.08);color:var(--c-primary);font-size:17px;
}
.yac-channel h3{font-size:16.5px;margin-bottom:6px;}
.yac-channel p{font-size:13.5px;color:var(--c-muted);line-height:1.7;}

/* ============ 讨论 / 表单 ============ */
.yac-discuss{display:grid;grid-template-columns:0.9fr 1.1fr;gap:56px;align-items:start;}
.yac-discuss h2{font-size:32px;line-height:1.3;margin-bottom:16px;}
.yac-discuss .yac-intro{color:var(--c-muted);font-size:15.5px;margin-bottom:24px;max-width:420px;}
.yac-checks{list-style:none;display:grid;gap:14px;}
.yac-checks li{display:flex;gap:11px;font-size:14.5px;color:var(--c-text);line-height:1.7;}
.yac-checks i{color:var(--c-accent);margin-top:5px;font-size:13px;}
.yac-form{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--shadow);
}
.yac-field{margin-bottom:18px;}
.yac-field label{display:block;font-size:13px;font-weight:600;color:var(--c-muted);margin-bottom:8px;}
.yac-input,.yac-textarea{
  width:100%;border:1px solid var(--c-line);border-radius:var(--r-sm);
  background:var(--c-bg);color:var(--c-text);font-size:14.5px;font-family:inherit;
  padding:12px 14px;transition:border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.yac-input{height:48px;}
.yac-textarea{min-height:120px;resize:vertical;line-height:1.75;}
.yac-input:focus,.yac-textarea:focus{
  outline:none;border-color:var(--c-primary);background:#fff;
  box-shadow:0 0 0 3px rgba(192,91,77,.15);
}
.yac-form-note{font-size:13px;color:var(--c-muted);margin-top:14px;line-height:1.7;}

/* ============ 订阅条 ============ */
.yac-cta-strip{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  background:rgba(192,91,77,.06);border:1px solid rgba(192,91,77,.22);
  border-radius:var(--r-card);padding:28px 32px;
}
.yac-cta-strip h3{font-size:19px;margin-bottom:6px;}
.yac-cta-strip p{font-size:13.5px;color:var(--c-muted);}
.yac-sub-form{display:flex;gap:12px;flex-wrap:wrap;}
.yac-sub-form .yac-input{width:240px;background:#fff;}
.yac-backtop{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--c-muted);
  background:none;border:0;cursor:pointer;padding:0;
}
.yac-backtop:hover{color:var(--c-primary);}

/* ============ 下载 ============ */
.yac-download{background:var(--c-ink);color:#F7F2EA;padding:72px 0;}
.yac-download .yac-eyebrow{color:var(--c-amber);}
.yac-download h2{color:#F7F2EA;font-size:32px;line-height:1.3;}
.yac-download-head{max-width:640px;margin-bottom:36px;}
.yac-download-head p{color:#B9AEA2;font-size:14.5px;margin-top:12px;}
.yac-dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.yac-dl-card{
  display:flex;flex-direction:column;gap:14px;padding:26px;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-card);transition:border-color .3s ease,transform .3s ease,background .3s ease;
}
.yac-dl-card:hover{border-color:rgba(223,163,78,.55);background:rgba(255,255,255,.08);transform:translateY(-2px);}
.yac-dl-card i.yac-dl-icon{font-size:24px;color:var(--c-amber);}
.yac-dl-card h3{color:#F7F2EA;font-size:17px;}
.yac-dl-card p{font-size:13px;color:#B9AEA2;line-height:1.7;}

/* ============ 页脚 ============ */
.yac-footer{background:var(--c-ink);color:#C9BFB4;padding:64px 0 0;}
.yac-footer .yac-brand{color:#F7F2EA;margin-bottom:16px;}
.yac-footer .yac-brand:hover{color:#fff;}
.yac-footer .yac-brand-text em{color:#A99C8E;}
.yac-footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;}
.yac-footer-grid p{font-size:13.5px;line-height:1.85;color:#A99C8E;}
.yac-footer h3{font-size:14px;color:#F7F2EA;margin-bottom:16px;letter-spacing:.04em;}
.yac-footer ul{list-style:none;display:grid;gap:11px;}
.yac-footer ul a{font-size:13.5px;color:#B8ADA1;}
.yac-footer ul a:hover{color:var(--c-amber);}
.yac-footer ul a i{margin-right:8px;font-size:13px;}
.yac-footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:#8E8378;
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .yac-art-hero h1{font-size:38px;}
  .yac-article-grid{gap:40px;}
}
@media (max-width:991px){
  .yac-primary-nav{display:none;}
  .yac-burger{display:inline-flex;align-items:center;justify-content:center;}
  .yac-drawer{display:block;}
  .yac-section{padding:64px 0;}
  .yac-section--tight{padding:52px 0;}
  .yac-section-head h2{font-size:28px;}
  .yac-section-head{margin-bottom:32px;}
  .yac-art-hero{padding:36px 0 34px;}
  .yac-art-hero h1{font-size:30px;}
  .yac-article-main{padding:52px 0 64px;}
  .yac-article-grid{grid-template-columns:1fr;gap:32px;}
  .yac-aside{position:static;grid-template-columns:1fr 1fr;gap:16px;}
  .yac-takeaways{grid-template-columns:1fr;gap:16px;}
  .yac-rules{grid-template-columns:repeat(2,1fr);}
  .yac-rule:nth-child(2n){border-right:0;}
  .yac-rule:nth-child(1),.yac-rule:nth-child(2){border-bottom:1px solid var(--c-line);}
  .yac-channels{grid-template-columns:1fr;}
  .yac-discuss{grid-template-columns:1fr;gap:32px;}
  .yac-discuss h2{font-size:26px;}
  .yac-dl-grid{grid-template-columns:1fr;}
  .yac-footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .yac-cta-strip{padding:24px;}
  .yac-sub-form .yac-input{width:100%;}
  .yac-sub-form{width:100%;}
  .yac-sub-form .yac-btn{width:100%;}
}
@media (max-width:575px){
  .container{padding:0 18px;}
  .yac-brand-text{font-size:16px;}
  .yac-art-hero h1{font-size:26px;line-height:1.3;}
  .yac-art-lead{font-size:15px;}
  .yac-article-body{font-size:15.5px;line-height:1.85;}
  .yac-article-body h2{font-size:21px;}
  .yac-article-body h3{font-size:18px;}
  .yac-aside{grid-template-columns:1fr;}
  .yac-rules{grid-template-columns:1fr;}
  .yac-rule{border-right:0;border-bottom:1px solid var(--c-line);}
  .yac-rule:last-child{border-bottom:0;}
  .yac-cta-strip h3{font-size:17px;}
  .yac-download h2{font-size:24px;}
  .yac-btn{padding:12px 22px;font-size:14px;}
  .yac-icon-item{min-width:84px;font-size:12px;}
  .yac-footer-grid{grid-template-columns:1fr;}
  .yac-footer-bottom{font-size:12px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition:none !important;animation:none !important;}
}

/* roulang page: category1 */
:root{
  --c-primary:#C05B4D;
  --c-primary-dark:#A94A3E;
  --c-accent:#7B8B6B;
  --c-amber:#DFA34E;
  --c-bg:#FAF6F0;
  --c-bg-alt:#F2EBE1;
  --c-ink:#1C1917;
  --c-text:#221F1C;
  --c-muted:#6B6259;
  --c-line:#E6DCCE;
  --c-white:#FFFDFA;
  --r-card:16px;
  --r-sm:12px;
  --shadow:0 10px 28px rgba(28,25,23,.05);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-serif:"Optima","Georgia","Songti SC",serif;
  --bs-primary:#C05B4D;
  --bs-body-bg:#FAF6F0;
  --bs-body-color:#221F1C;
  --bs-border-radius:12px;
  --bs-font-sans-serif:var(--font-sans);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:var(--c-primary);text-decoration:none;transition:color .25s ease;}
a:hover{color:var(--c-primary-dark);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;letter-spacing:-.02em;line-height:1.15;font-weight:700;color:var(--c-text);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ============ 按钮 ============ */
.yac-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:background .25s ease,color .25s ease,border-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.yac-btn i{transition:transform .25s ease;font-size:13px;}
.yac-btn:hover i{transform:translateX(4px);}
.yac-btn-primary{background:var(--c-primary);color:#fff;border-color:var(--c-primary);}
.yac-btn-primary:hover{background:var(--c-primary-dark);border-color:var(--c-primary-dark);color:#fff;}
.yac-btn-primary:active{transform:translateY(1px);}
.yac-btn-outline{background:transparent;color:var(--c-primary);border-color:rgba(192,91,77,.45);}
.yac-btn-outline:hover{background:rgba(192,91,77,.08);color:var(--c-primary-dark);border-color:var(--c-primary);}
.yac-btn-ghost{background:#fff;color:var(--c-ink);border-color:#fff;}
.yac-btn-ghost:hover{background:#F7F2EA;color:var(--c-ink);}
.yac-btn-sm{padding:10px 20px;font-size:14px;}
.yac-btn:focus-visible,.yac-burger:focus-visible,.yac-icon-item:focus-visible,
.yac-primary-nav a:focus-visible,.yac-news-row:focus-visible{
  outline:2px solid var(--c-primary);outline-offset:2px;
}

/* ============ 徽章 / 标签 ============ */
.yac-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;font-size:12px;font-weight:600;
  background:rgba(192,91,77,.08);color:var(--c-primary-dark);
}
.yac-badge--green{background:rgba(123,139,107,.12);color:#5D6B4F;}
.yac-badge--amber{background:rgba(223,163,78,.14);color:#8C6318;}
.yac-tagwall{display:flex;flex-wrap:wrap;gap:10px;}
.yac-tag{
  display:inline-block;padding:8px 16px;border-radius:999px;font-size:13px;
  background:#fff;border:1px solid var(--c-line);color:var(--c-muted);
  transition:color .25s ease,border-color .25s ease,background .25s ease;
}
.yac-tag:hover{color:var(--c-primary);border-color:rgba(192,91,77,.4);background:rgba(192,91,77,.04);}

/* ============ 头部导航 ============ */
.yac-header{position:relative;z-index:60;background:var(--c-white);border-bottom:1px solid var(--c-line);}
.yac-topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px;}
.yac-brand{display:inline-flex;align-items:center;gap:10px;color:var(--c-text);}
.yac-brand:hover{color:var(--c-text);}
.yac-brand-mark{
  width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--c-primary),#D4796B);color:#fff;
  font-size:19px;font-weight:700;flex:0 0 auto;
  box-shadow:0 6px 16px rgba(192,91,77,.24);
}
.yac-brand-text{display:flex;flex-direction:column;line-height:1.15;font-size:18px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;}
.yac-brand-text em{font-style:normal;font-size:11px;font-weight:500;letter-spacing:.16em;color:var(--c-muted);}
.yac-primary-nav{display:flex;align-items:center;gap:28px;margin-left:auto;}
.yac-primary-nav a{position:relative;font-size:15px;color:var(--c-text);padding:6px 0;white-space:nowrap;}
.yac-primary-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.yac-primary-nav a:hover{color:var(--c-primary);}
.yac-primary-nav a:hover::after,.yac-primary-nav a.is-active::after{transform:scaleX(1);}
.yac-primary-nav a.is-active{color:var(--c-primary);font-weight:600;}
.yac-actions{display:flex;align-items:center;gap:12px;}
.yac-burger{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);
  background:#fff;color:var(--c-text);font-size:16px;align-items:center;justify-content:center;
  transition:border-color .25s ease,color .25s ease;
}
.yac-burger:hover{border-color:rgba(192,91,77,.45);color:var(--c-primary);}
.yac-iconbar-wrap{border-top:1px solid var(--c-line);background:var(--c-white);}
.yac-iconbar{display:flex;align-items:center;gap:2px;overflow-x:auto;padding:4px 0;scrollbar-width:none;}
.yac-iconbar::-webkit-scrollbar{display:none;}
.yac-icon-item{
  flex:0 0 auto;display:flex;flex-direction:column;align-items:center;gap:6px;
  padding:14px 16px 12px;min-width:96px;border-radius:12px;
  font-size:13px;color:var(--c-muted);position:relative;
  transition:background .25s ease,color .25s ease;
}
.yac-icon-item i{font-size:20px;color:var(--c-primary);line-height:1;}
.yac-icon-item:hover,.yac-icon-item.is-active{background:rgba(192,91,77,.08);color:var(--c-primary);}
.yac-icon-item.is-active::after{
  content:"";position:absolute;bottom:4px;left:50%;transform:translateX(-50%);
  width:22px;height:2px;border-radius:2px;background:var(--c-primary);
}
.yac-drawer{
  display:none;position:fixed;inset:0;z-index:80;background:rgba(28,25,23,.45);
  opacity:0;pointer-events:none;transition:opacity .2s ease;
}
.yac-drawer.is-open{opacity:1;pointer-events:auto;display:block;}
.yac-drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(86vw,360px);
  background:var(--c-bg);padding:22px;overflow-y:auto;
  transform:translateX(100%);transition:transform .24s ease;
}
.yac-drawer.is-open .yac-drawer-panel{transform:translateX(0);}
.yac-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.yac-drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--c-line);background:#fff;color:var(--c-text);}
.yac-drawer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:22px;}
.yac-drawer-grid a{
  display:flex;flex-direction:column;align-items:center;gap:6px;padding:14px 4px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-sm);
  font-size:12px;color:var(--c-muted);text-align:center;
}
.yac-drawer-grid a i{font-size:18px;color:var(--c-primary);}
.yac-drawer-grid a:hover{border-color:rgba(192,91,77,.4);color:var(--c-primary);}

/* ============ 通用板块 ============ */
.yac-section{padding:96px 0;}
.yac-section--alt{background:var(--c-bg-alt);}
.yac-section--ink{background:var(--c-ink);color:#F7F2EA;}
.yac-section--ink h2,.yac-section--ink h3{color:#F7F2EA;}
.yac-section--ink p{color:rgba(247,242,234,.76);}
.yac-head{max-width:720px;margin-bottom:48px;}
.yac-eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.18em;font-weight:700;
  color:var(--c-primary);text-transform:uppercase;margin-bottom:14px;
}
.yac-head h2{font-size:40px;line-height:1.15;}
.yac-head p{margin-top:16px;font-size:16px;color:var(--c-muted);}
.yac-section--ink .yac-eyebrow{color:var(--c-amber);}

/* ============ 分类页头 ============ */
.yac-cathead{
  background:var(--c-bg-alt);
  border-bottom:1px solid var(--c-line);
  padding:44px 0 40px;
  position:relative;
  overflow:hidden;
}
.yac-cathead::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(90deg,rgba(28,25,23,.035) 0 1px,transparent 1px 96px);
  pointer-events:none;
}
.yac-cathead .container{position:relative;}
.yac-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:20px;}
.yac-crumb a{color:var(--c-muted);}
.yac-crumb a:hover{color:var(--c-primary);}
.yac-crumb span.sep{opacity:.55;}
.yac-cathead h1{font-size:48px;line-height:1.12;margin-bottom:16px;}
.yac-cathead h1 em{font-style:normal;color:var(--c-primary);}
.yac-catlead{font-size:17px;color:var(--c-muted);max-width:680px;}
.yac-stats{display:flex;flex-wrap:wrap;gap:14px 40px;margin-top:28px;}
.yac-stats div{display:flex;align-items:baseline;gap:8px;font-size:13px;color:var(--c-muted);}
.yac-stats strong{
  font-family:var(--font-serif);font-size:30px;font-weight:700;color:var(--c-ink);line-height:1;
}
.yac-cathead-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}

/* ============ 话题卡网格 ============ */
.yac-topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.yac-topic-card{
  background:var(--c-white);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow);
  transition:border-color .3s ease,transform .3s ease,box-shadow .3s ease;
  display:flex;flex-direction:column;
}
.yac-topic-card:hover{border-color:rgba(192,91,77,.4);transform:translateY(-2px);box-shadow:0 16px 34px rgba(28,25,23,.09);}
.yac-thumb{
  position:relative;aspect-ratio:16/10;background:var(--c-bg-alt);overflow:hidden;
  border-bottom:1px solid var(--c-line);
}
.yac-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.yac-topic-card:hover .yac-thumb img{transform:scale(1.03);}
.yac-thumb .yac-badge{position:absolute;left:14px;top:14px;background:rgba(255,253,250,.94);}
.yac-topic-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.yac-topic-body h3{font-size:20px;}
.yac-topic-body p{font-size:14px;color:var(--c-muted);line-height:1.8;}
.yac-topic-foot{margin-top:auto;display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);}
.yac-topic-foot i{color:var(--c-accent);}

/* ============ 三步形式 ============ */
.yac-flow{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--c-line);}
.yac-flow-item{padding:36px 32px 8px;border-left:1px solid var(--c-line);}
.yac-flow-item:first-child{border-left:none;padding-left:0;}
.yac-flow-num{
  font-family:var(--font-serif);font-size:40px;line-height:1;color:var(--c-primary);
  opacity:.85;margin-bottom:16px;
}
.yac-flow-item h3{font-size:21px;margin-bottom:12px;}
.yac-flow-item p{font-size:15px;color:var(--c-muted);}

/* ============ 安全边界 ============ */
.yac-safety-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid rgba(247,242,234,.16);}
.yac-safety-item{padding:34px 26px 30px;border-left:1px solid rgba(247,242,234,.16);}
.yac-safety-item:first-child{border-left:none;padding-left:0;}
.yac-safety-item i{font-size:20px;color:var(--c-amber);margin-bottom:16px;display:block;}
.yac-safety-item h3{font-size:18px;margin-bottom:10px;}
.yac-safety-item p{font-size:14px;line-height:1.8;}
.yac-safety-note{
  margin-top:36px;padding:16px 24px;border-radius:999px;
  background:rgba(192,91,77,.16);border:1px solid rgba(223,163,78,.32);
  font-size:14px;color:rgba(247,242,234,.88);
  display:flex;align-items:center;gap:10px;
}
.yac-safety-note i{color:var(--c-amber);}

/* ============ 专题推荐 ============ */
.yac-feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.yac-feature-card{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--c-line);background:var(--c-ink);
  aspect-ratio:16/9;display:block;
}
.yac-feature-card img{width:100%;height:100%;object-fit:cover;opacity:.62;transition:transform .45s ease,opacity .45s ease;}
.yac-feature-card:hover img{transform:scale(1.03);opacity:.7;}
.yac-feature-cover{
  position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;
  padding:30px;background:linear-gradient(180deg,rgba(28,25,23,0) 30%,rgba(28,25,23,.82) 100%);
  color:#F7F2EA;
}
.yac-feature-cover h3{color:#fff;font-size:24px;margin-bottom:10px;}
.yac-feature-cover p{font-size:14px;color:rgba(247,242,234,.82);line-height:1.75;max-width:420px;}
.yac-feature-cover .yac-badge{margin-bottom:14px;background:rgba(255,253,250,.92);color:var(--c-primary-dark);align-self:flex-start;}

/* ============ 资讯列表 ============ */
.yac-news-list{border-top:1px solid var(--c-line);}
.yac-news-row{
  display:flex;align-items:flex-start;gap:24px;justify-content:space-between;
  padding:26px 4px;border-bottom:1px solid var(--c-line);color:var(--c-text);
  transition:background .25s ease,padding-left .25s ease;
}
.yac-news-row:hover{background:rgba(255,253,250,.85);padding-left:14px;color:var(--c-text);}
.yac-news-body{max-width:800px;}
.yac-news-body h3{font-size:19px;margin:10px 0 8px;}
.yac-news-row:hover h3{color:var(--c-primary);}
.yac-news-body p{font-size:14px;color:var(--c-muted);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.yac-news-time{
  flex:0 0 auto;font-size:13px;color:var(--c-muted);font-family:var(--font-serif);
  padding-top:6px;white-space:nowrap;
}
.yac-news-empty{
  border:1px dashed var(--c-line);border-radius:var(--r-card);background:var(--c-white);
  padding:56px 24px;text-align:center;color:var(--c-muted);
}
.yac-news-empty i{font-size:26px;color:var(--c-primary);display:block;margin-bottom:14px;}
.yac-news-empty p{font-size:15px;margin-bottom:18px;}

/* ============ FAQ ============ */
.yac-faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start;}
.yac-accordion .accordion-item{
  border:1px solid var(--c-line);border-radius:var(--r-sm);background:var(--c-white);
  margin-bottom:12px;overflow:hidden;
}
.yac-accordion .accordion-button{
  font-size:16px;font-weight:600;color:var(--c-text);background:var(--c-white);
  padding:18px 22px;box-shadow:none;line-height:1.5;
}
.yac-accordion .accordion-button:not(.collapsed){
  color:var(--c-primary);background:rgba(192,91,77,.05);box-shadow:none;
}
.yac-accordion .accordion-button:focus{box-shadow:none;outline:2px solid rgba(192,91,77,.45);outline-offset:-2px;}
.yac-accordion .accordion-button::after{
  background-image:none;content:"+";font-family:var(--font-sans);
  font-size:20px;font-weight:600;color:var(--c-primary);
  width:auto;height:auto;line-height:1;transform:none;transition:none;
}
.yac-accordion .accordion-button:not(.collapsed)::after{content:"−";transform:none;}
.yac-accordion .accordion-body{
  padding:4px 22px 22px;font-size:15px;color:var(--c-muted);line-height:1.85;
}
.yac-faq-aside{
  background:var(--c-white);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--shadow);
}
.yac-faq-aside h3{font-size:20px;margin-bottom:14px;}
.yac-faq-aside p{font-size:14px;color:var(--c-muted);margin-bottom:20px;}
.yac-faq-aside ul{display:flex;flex-direction:column;gap:12px;}
.yac-faq-aside li{display:flex;gap:10px;font-size:14px;color:var(--c-muted);}
.yac-faq-aside li i{color:var(--c-accent);margin-top:5px;font-size:13px;}

/* ============ 下载 ============ */
.yac-dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.yac-dl-card{
  background:var(--c-white);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:32px 28px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:14px;
  transition:border-color .3s ease,transform .3s ease;
}
.yac-dl-card:hover{border-color:rgba(192,91,77,.4);transform:translateY(-2px);}
.yac-dl-card i.yac-dl-icon{font-size:26px;color:var(--c-primary);}
.yac-dl-card h3{font-size:20px;}
.yac-dl-card p{font-size:14px;color:var(--c-muted);}
.yac-dl-card .yac-btn{margin-top:auto;}

/* ============ 加入 / 订阅 ============ */
.yac-join{background:var(--c-bg-alt);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.yac-join-inner{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
}
.yac-join h2{font-size:34px;margin-bottom:14px;}
.yac-join p{font-size:15px;color:var(--c-muted);}
.yac-join-form{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
.yac-input{
  flex:1 1 220px;height:48px;border-radius:var(--r-sm);border:1px solid var(--c-line);
  background:#fff;padding:0 16px;font-size:15px;color:var(--c-text);
  transition:border-color .25s ease,box-shadow .25s ease;
}
.yac-input::placeholder{color:#A79C8F;}
.yac-input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(192,91,77,.14);}
.yac-form-tip{flex:1 1 100%;font-size:13px;color:var(--c-accent);min-height:20px;}

/* ============ 页脚 ============ */
.yac-footer{background:var(--c-ink);color:rgba(247,242,234,.74);padding:72px 0 32px;}
.yac-footer .yac-brand{color:#F7F2EA;margin-bottom:16px;}
.yac-footer .yac-brand:hover{color:#F7F2EA;}
.yac-footer .yac-brand-text em{color:rgba(247,242,234,.55);}
.yac-footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.yac-footer p{font-size:14px;line-height:1.85;max-width:340px;}
.yac-footer h3{font-size:15px;color:#F7F2EA;margin-bottom:18px;letter-spacing:.02em;}
.yac-footer ul{display:flex;flex-direction:column;gap:11px;}
.yac-footer ul a{font-size:14px;color:rgba(247,242,234,.72);}
.yac-footer ul a:hover{color:#fff;}
.yac-footer ul a i{margin-right:8px;color:var(--c-amber);width:14px;}
.yac-footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(247,242,234,.14);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(247,242,234,.55);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .yac-cathead h1{font-size:42px;}
  .yac-topic-grid{gap:20px;}
}
@media (max-width:991px){
  .yac-primary-nav{display:none;}
  .yac-burger{display:flex;}
  .yac-iconbar-wrap{display:none;}
  .yac-actions .yac-btn{display:none;}
  .yac-head h2{font-size:32px;}
  .yac-cathead{padding:34px 0 32px;}
  .yac-cathead h1{font-size:34px;}
  .yac-topic-grid{grid-template-columns:repeat(2,1fr);}
  .yac-safety-grid{grid-template-columns:repeat(2,1fr);}
  .yac-safety-item{padding:26px 22px;border-left:none;border-top:1px solid rgba(247,242,234,.16);}
  .yac-safety-item:nth-child(odd){padding-left:0;}
  .yac-faq-layout{grid-template-columns:1fr;gap:32px;}
  .yac-join-inner{grid-template-columns:1fr;gap:28px;}
  .yac-dl-grid{grid-template-columns:1fr;gap:16px;}
  .yac-footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .yac-section{padding:72px 0;}
}
@media (max-width:767px){
  body{font-size:15px;}
  .container{padding:0 18px;}
  .yac-section{padding:56px 0;}
  .yac-head{margin-bottom:32px;}
  .yac-head h2{font-size:26px;}
  .yac-cathead h1{font-size:28px;}
  .yac-catlead{font-size:15px;}
  .yac-stats{gap:12px 24px;}
  .yac-stats strong{font-size:24px;}
  .yac-topic-grid{grid-template-columns:1fr;}
  .yac-flow{grid-template-columns:1fr;}
  .yac-flow-item{border-left:none;border-top:1px solid var(--c-line);padding:24px 0 0;}
  .yac-flow-item:first-child{border-top:none;}
  .yac-feature-grid{grid-template-columns:1fr;}
  .yac-safety-grid{grid-template-columns:1fr;}
  .yac-news-row{flex-direction:column;gap:8px;}
  .yac-news-time{padding-top:0;}
  .yac-join h2{font-size:26px;}
  .yac-footer{padding:52px 0 26px;}
  .yac-footer-grid{grid-template-columns:1fr;}
  .yac-cathead-actions .yac-btn{width:100%;}
}
@media (max-width:520px){
  .yac-brand-text{font-size:16px;}
  .yac-brand-text em{letter-spacing:.1em;}
  .yac-cathead h1{font-size:24px;}
  .yac-feature-cover{padding:20px;}
  .yac-feature-cover h3{font-size:19px;}
  .yac-feature-cover p{font-size:13px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
  .yac-topic-card:hover,.yac-dl-card:hover{transform:none;}
  .yac-topic-card:hover .yac-thumb img,.yac-feature-card:hover img{transform:none;}
}