/* roulang page: index */
:root{
  --ink:#16181A;
  --ink-soft:#23262A;
  --paper:#F7F5F1;
  --paper-2:#EFEBE4;
  --card:#FFFFFF;
  --accent:#C1502E;
  --accent-soft:rgba(193,80,46,.08);
  --moss:#4A5A52;
  --text:#1A1A18;
  --text-2:#5C5F5A;
  --text-3:#8A8D86;
  --border:#E2DED6;
  --divider:#EAE6DF;
  --radius-card:6px;
  --radius-btn:2px;
  --radius-img:4px;
  --shadow-1:0 1px 2px rgba(22,24,26,.04);
  --shadow-2:0 18px 40px rgba(22,24,26,.08);
  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1200px;
  --serif:"Noto Serif SC","Songti SC",Georgia,serif;
  --sans:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:inherit;text-decoration:none;}
a:hover{color:inherit;}
p{margin:0 0 1.1em;}
h1,h2,h3,h4{margin:0;font-family:var(--serif);font-weight:700;letter-spacing:-.02em;line-height:1.3;color:var(--text);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px;}
.rk-num,.rk-stat__value{font-variant-numeric:tabular-nums;}

/* ============ 容器与板块 ============ */
.grid-container.rk-container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.rk-section{padding:104px 0;}
.rk-section--tight{padding:72px 0;}
.rk-section--alt{background:var(--paper-2);}
.rk-section--dark{background:var(--ink);color:var(--paper);}
.rk-section--dark h2,.rk-section--dark h3{color:var(--paper);}
.rk-head{max-width:720px;margin-bottom:52px;}
.rk-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.rk-eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--accent);font-weight:500;margin-bottom:18px;
}
.rk-h2{font-size:clamp(26px,3vw,40px);margin-bottom:16px;}
.rk-lead{font-size:17.5px;line-height:1.9;color:var(--text-2);max-width:640px;margin:0;}
.rk-head--center .rk-lead{margin:0 auto;}
.rk-divider{height:1px;background:var(--divider);border:0;margin:0;}

/* ============ 按钮 / 链接 / 徽章 ============ */
.rk-btn{
  display:inline-flex;align-items:center;gap:10px;justify-content:center;
  min-height:50px;padding:0 32px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:500;letter-spacing:.02em;line-height:1;
  transition:background-color .42s var(--ease),color .42s var(--ease),border-color .42s var(--ease),transform .42s var(--ease);
  white-space:nowrap;
}
.rk-btn .rk-arrow{transition:transform .42s var(--ease);font-size:14px;}
.rk-btn--primary{background:var(--ink);color:var(--paper);border:1px solid var(--ink);}
.rk-btn--primary:hover{background:var(--accent);border-color:var(--accent);color:#fff;}
.rk-btn--primary:hover .rk-arrow{transform:translateX(4px);}
.rk-btn--primary:active{transform:translateY(1px);}
.rk-btn--ghost{background:transparent;border:1px solid var(--ink);color:var(--ink);}
.rk-btn--ghost:hover{background:var(--ink);color:var(--paper);}
.rk-btn--light{background:var(--paper);color:var(--ink);border:1px solid var(--paper);}
.rk-btn--light:hover{background:var(--accent);border-color:var(--accent);color:#fff;}
.rk-btn--sm{min-height:44px;padding:0 24px;font-size:14px;}
.rk-btn--block{width:100%;}
.rk-btn[disabled],.rk-btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;}
.rk-btn.is-loading{opacity:.7;pointer-events:none;}
.rk-link{
  position:relative;display:inline-block;font-size:15px;font-weight:500;color:var(--ink);
  padding-bottom:3px;transition:color .32s var(--ease);
}
.rk-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--accent);
  transition:width .42s var(--ease);
}
.rk-link:hover{color:var(--accent);}
.rk-link:hover::after{width:100%;}
.rk-arrow-link{
  display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:500;color:var(--ink);
  transition:color .32s var(--ease),gap .32s var(--ease);
}
.rk-arrow-link i{font-size:12px;transition:transform .42s var(--ease);}
.rk-arrow-link:hover{color:var(--accent);}
.rk-arrow-link:hover i{transform:translateX(4px);}
.rk-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border:1px solid var(--border);border-radius:999px;
  background:var(--card);font-size:12.5px;color:var(--text-2);letter-spacing:.04em;line-height:1.4;
}
.rk-badge--accent{border-color:rgba(193,80,46,.35);color:var(--accent);background:var(--accent-soft);}
.rk-badge--dark{background:transparent;border-color:rgba(247,245,241,.28);color:rgba(247,245,241,.85);}

/* ============ 顶部信息条 ============ */
.rk-topbar{background:var(--ink);color:rgba(247,245,241,.86);font-size:12.5px;letter-spacing:.02em;}
.rk-topbar__inner{height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px;}
.rk-topbar__left{display:flex;align-items:center;gap:12px;min-width:0;overflow:hidden;white-space:nowrap;}
.rk-topbar__dot{width:6px;height:6px;border-radius:1px;background:var(--accent);flex:0 0 auto;}
.rk-topbar__sep{color:rgba(247,245,241,.3);}
.rk-topbar__right{display:flex;align-items:center;gap:22px;flex:0 0 auto;}
.rk-topbar__right a{color:rgba(247,245,241,.92);border-bottom:1px solid rgba(247,245,241,.3);padding-bottom:1px;transition:color .3s var(--ease),border-color .3s var(--ease);}
.rk-topbar__right a:hover{color:var(--accent);border-color:var(--accent);}

/* ============ 主导航 ============ */
.rk-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,245,241,.94);
  backdrop-filter:saturate(160%) blur(10px);
  -webkit-backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .4s var(--ease);
}
.rk-header.is-scrolled{box-shadow:0 8px 26px rgba(22,24,26,.07);}
.rk-header__inner{display:flex;align-items:center;gap:34px;height:84px;transition:height .4s var(--ease);}
.rk-header.is-scrolled .rk-header__inner{height:70px;}
.rk-logo{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.rk-logo__mark{
  width:34px;height:34px;border-radius:2px;background:var(--ink);position:relative;flex:0 0 auto;
  transition:background-color .4s var(--ease);
}
.rk-logo__mark::before{
  content:"";position:absolute;inset:8px 8px auto 8px;height:2px;background:var(--accent);
}
.rk-logo__mark::after{
  content:"";position:absolute;left:8px;bottom:8px;width:9px;height:9px;background:var(--paper);
}
.rk-logo:hover .rk-logo__mark{background:var(--accent);}
.rk-logo__text{display:flex;flex-direction:column;line-height:1.2;}
.rk-logo__text strong{font-family:var(--serif);font-size:17px;font-weight:700;letter-spacing:.01em;}
.rk-logo__text em{font-style:normal;font-size:11.5px;color:var(--text-3);letter-spacing:.14em;margin-top:3px;}
.rk-nav{display:flex;align-items:center;gap:30px;margin-left:auto;}
.rk-nav a{
  position:relative;font-size:15px;font-weight:500;color:var(--text-2);padding:6px 0;
  transition:color .32s var(--ease);
}
.rk-nav a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--accent);
  transition:width .38s var(--ease);
}
.rk-nav a:hover{color:var(--ink);}
.rk-nav a:hover::after{width:100%;}
.rk-nav a.is-active{color:var(--ink);}
.rk-nav a.is-active::after{width:24px;}
.rk-header__actions{display:flex;align-items:center;gap:14px;flex:0 0 auto;}
.rk-burger{
  display:none;width:46px;height:46px;border:1px solid var(--border);border-radius:2px;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;background:var(--card);
}
.rk-burger span{display:block;width:18px;height:1.5px;background:var(--ink);transition:transform .4s var(--ease),opacity .3s var(--ease);}
.rk-burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.rk-burger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.rk-burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

/* 抽屉 */
.rk-drawer{position:fixed;inset:0;z-index:120;pointer-events:none;}
.rk-drawer__mask{
  position:absolute;inset:0;background:rgba(22,24,26,.55);opacity:0;transition:opacity .4s var(--ease);
}
.rk-drawer__panel{
  position:absolute;top:0;right:0;height:100%;width:min(88vw,360px);background:var(--card);
  padding:28px 26px 40px;transform:translateX(100%);transition:transform .48s var(--ease);
  overflow-y:auto;box-shadow:-18px 0 44px rgba(22,24,26,.16);
}
.rk-drawer.is-open{pointer-events:auto;}
.rk-drawer.is-open .rk-drawer__mask{opacity:1;}
.rk-drawer.is-open .rk-drawer__panel{transform:translateX(0);}
.rk-drawer__head{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid var(--divider);margin-bottom:12px;}
.rk-drawer__head span{font-family:var(--serif);font-size:16px;font-weight:700;}
.rk-drawer__close{width:44px;height:44px;display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--text-2);}
.rk-drawer__nav{display:flex;flex-direction:column;}
.rk-drawer__nav a{
  padding:16px 0;border-bottom:1px solid var(--divider);font-size:16px;font-weight:500;color:var(--text);
  opacity:0;transform:translateX(12px);transition:opacity .4s var(--ease),transform .4s var(--ease),color .3s var(--ease);
}
.rk-drawer.is-open .rk-drawer__nav a{opacity:1;transform:translateX(0);}
.rk-drawer__nav a.is-active{color:var(--accent);}
.rk-drawer__nav a:hover{color:var(--accent);}
.rk-drawer__foot{margin-top:28px;display:flex;flex-direction:column;gap:14px;}
.rk-drawer__foot p{font-size:13px;color:var(--text-3);margin:0;}

/* ============ Hero ============ */
.rk-hero{padding:88px 0 96px;position:relative;overflow:hidden;}
.rk-hero::before{
  content:"";position:absolute;right:-140px;top:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(193,80,46,.07),transparent 68%);pointer-events:none;
}
.rk-hero__grid{display:grid;grid-template-columns:7fr 5fr;gap:64px;align-items:center;}
.rk-hero__text{max-width:660px;}
.rk-hero h1{
  font-size:clamp(34px,4.4vw,58px);line-height:1.22;margin-bottom:24px;
}
.rk-hero h1 .rk-mark{position:relative;display:inline-block;}
.rk-hero h1 .rk-mark::after{
  content:"";position:absolute;left:0;right:0;bottom:4px;height:8px;background:var(--accent-soft);z-index:-1;
}
.rk-hero__sub{font-size:19px;line-height:1.85;color:var(--text-2);max-width:560px;margin-bottom:36px;}
.rk-hero__cta{display:flex;align-items:center;gap:28px;flex-wrap:wrap;margin-bottom:26px;}
.rk-hero__trust{
  display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--text-3);margin:0;
}
.rk-hero__trust::before{content:"";width:26px;height:1px;background:var(--accent);display:block;}
.rk-hero__media{position:relative;}
.rk-hero__frame{
  position:relative;border:1px solid var(--border);border-radius:var(--radius-img);padding:10px;background:var(--card);
  box-shadow:var(--shadow-1);
}
.rk-hero__frame img{width:100%;aspect-ratio:4/5;object-fit:cover;}
.rk-hero__frame::after{
  content:"";position:absolute;left:-14px;bottom:-14px;width:96px;height:96px;border-left:1px solid var(--accent);border-bottom:1px solid var(--accent);
}
.rk-hero__badge{
  position:absolute;right:-14px;bottom:34px;background:var(--ink);color:var(--paper);
  padding:16px 20px;border-radius:var(--radius-card);box-shadow:var(--shadow-2);min-width:150px;
}
.rk-hero__badge span{display:block;font-size:12px;letter-spacing:.12em;color:rgba(247,245,241,.6);margin-bottom:6px;}
.rk-hero__badge strong{font-family:var(--serif);font-size:26px;font-weight:900;color:var(--paper);}

/* ============ 信任条 ============ */
.rk-trust{border-top:1px solid var(--divider);border-bottom:1px solid var(--divider);padding:26px 0;}
.rk-trust__inner{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;}
.rk-trust__label{font-size:12.5px;letter-spacing:.16em;color:var(--text-3);flex:0 0 auto;}
.rk-trust__list{display:flex;align-items:center;gap:38px;flex-wrap:wrap;}
.rk-trust__list li{
  font-family:var(--serif);font-size:16px;font-weight:700;color:var(--text-2);
  opacity:.55;transition:opacity .4s var(--ease),color .4s var(--ease);letter-spacing:.04em;
}
.rk-trust__list li:hover{opacity:1;color:var(--ink);}

/* ============ 痛点卡 ============ */
.rk-row{margin:0 -12px;}
.rk-col{padding:0 12px;margin-bottom:24px;}
.rk-pain{
  height:100%;background:var(--card);border:1px solid var(--border);border-left:2px solid var(--accent);
  border-radius:var(--radius-card);padding:30px 26px 28px;box-shadow:var(--shadow-1);
  transition:background-color .46s var(--ease),color .46s var(--ease),border-color .46s var(--ease),transform .46s var(--ease);
}
.rk-pain__no{font-family:var(--serif);font-size:34px;font-weight:900;color:var(--accent);line-height:1;margin-bottom:18px;display:block;}
.rk-pain h3{font-size:19px;line-height:1.5;margin-bottom:12px;}
.rk-pain p{font-size:14.5px;color:var(--text-2);margin:0;line-height:1.85;}
.rk-pain:hover{background:var(--ink);border-color:var(--ink);transform:translateY(-4px);}
.rk-pain:hover h3,.rk-pain:hover p{color:var(--paper);}
.rk-pain:hover .rk-pain__no{color:var(--accent);}

/* ============ 方案区 2+1 ============ */
.rk-solution{display:grid;grid-template-columns:1.15fr 1fr;gap:28px;align-items:stretch;}
.rk-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);overflow:hidden;
  transition:border-color .46s var(--ease),transform .46s var(--ease),box-shadow .46s var(--ease);
}
.rk-card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:var(--shadow-2);}
.rk-card--feature{display:flex;flex-direction:column;}
.rk-card__media{overflow:hidden;position:relative;background:var(--paper-2);}
.rk-card__media img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0;transition:transform .6s var(--ease);}
.rk-card:hover .rk-card__media img{transform:scale(1.03);}
.rk-card__body{padding:32px 30px 34px;display:flex;flex-direction:column;flex:1;}
.rk-card__body h3{font-size:23px;margin:16px 0 14px;}
.rk-card__body p{font-size:15px;color:var(--text-2);line-height:1.9;margin-bottom:26px;}
.rk-card__body .rk-arrow-link{margin-top:auto;}
.rk-stack{display:grid;grid-template-rows:1fr 1fr;gap:28px;}
.rk-card--mini{padding:34px 30px;display:flex;flex-direction:column;}
.rk-card--mini .rk-mini-no{
  font-family:var(--serif);font-size:15px;font-weight:700;letter-spacing:.18em;color:var(--accent);margin-bottom:16px;
}
.rk-card--mini h3{font-size:21px;margin-bottom:14px;}
.rk-card--mini p{font-size:15px;color:var(--text-2);margin-bottom:22px;line-height:1.9;}
.rk-card--mini .rk-arrow-link{margin-top:auto;}

/* ============ 数据区 ============ */
.rk-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid rgba(247,245,241,.14);}
.rk-stat{padding:38px 30px 34px;border-right:1px solid rgba(247,245,241,.14);}
.rk-stat:last-child{border-right:0;}
.rk-stat__value{
  font-family:var(--serif);font-size:clamp(38px,4vw,58px);font-weight:900;color:var(--paper);line-height:1;display:block;margin-bottom:14px;
}
.rk-stat__value em{font-style:normal;font-size:.5em;color:var(--accent);margin-left:4px;letter-spacing:0;}
.rk-stat__label{font-size:14px;color:rgba(247,245,241,.62);margin:0;line-height:1.7;}
.rk-stats__foot{
  margin-top:34px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(247,245,241,.5);
}
.rk-stats__foot .rk-link{color:rgba(247,245,241,.86);}
.rk-stats__foot .rk-link:hover{color:var(--accent);}

/* ============ 最新信息 ============ */
.rk-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none;margin-bottom:46px;}
.rk-news{display:grid;grid-template-columns:1.25fr 1fr;gap:40px;align-items:start;}
.rk-news__feature{display:block;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;transition:border-color .44s var(--ease),transform .44s var(--ease),box-shadow .44s var(--ease);}
.rk-news__feature:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:var(--shadow-2);}
.rk-news__feature img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0;transition:transform .6s var(--ease);}
.rk-news__feature:hover img{transform:scale(1.03);}
.rk-news__fbody{padding:28px 28px 30px;}
.rk-news__fbody h3{font-size:22px;line-height:1.45;margin:14px 0 12px;}
.rk-news__fbody p{font-size:15px;color:var(--text-2);margin-bottom:20px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rk-meta{display:flex;align-items:center;gap:14px;font-size:13px;color:var(--text-3);flex-wrap:wrap;}
.rk-meta span{display:inline-flex;align-items:center;gap:6px;}
.rk-list{display:flex;flex-direction:column;}
.rk-list__item{
  display:block;padding:22px 0;border-bottom:1px solid var(--divider);
  transition:padding-left .4s var(--ease);
}
.rk-list__item:first-child{padding-top:6px;}
.rk-list__item:hover{padding-left:8px;}
.rk-list__item h3{font-size:17px;line-height:1.6;margin-bottom:10px;transition:color .34s var(--ease);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rk-list__item:hover h3{color:var(--accent);}
.rk-empty{
  border:1px dashed var(--border);border-radius:var(--radius-card);background:var(--card);
  padding:52px 28px;text-align:center;color:var(--text-3);font-size:15px;
}
.rk-empty i{display:block;font-size:22px;color:var(--border);margin-bottom:14px;}

/* ============ FAQ ============ */
.rk-faq{border-top:1px solid var(--border);}
.rk-faq__item{border-bottom:1px solid var(--border);}
.rk-faq__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:26px 4px;text-align:left;font-size:17.5px;font-weight:700;font-family:var(--serif);
  color:var(--text);transition:color .34s var(--ease);
}
.rk-faq__q:hover{color:var(--accent);}
.rk-faq__icon{
  position:relative;width:16px;height:16px;flex:0 0 auto;
}
.rk-faq__icon::before,.rk-faq__icon::after{
  content:"";position:absolute;background:var(--accent);transition:transform .42s var(--ease),opacity .42s var(--ease);
}
.rk-faq__icon::before{left:0;top:7.5px;width:16px;height:1.5px;}
.rk-faq__icon::after{top:0;left:7.5px;height:16px;width:1.5px;}
.rk-faq__item.is-open .rk-faq__icon::after{transform:scaleY(0);opacity:0;}
.rk-faq__a{overflow:hidden;max-height:0;transition:max-height .5s var(--ease);}
.rk-faq__a-inner{padding:0 60px 28px 4px;font-size:15px;line-height:1.95;color:var(--text-2);}
.rk-faq__a-inner p:last-child{margin-bottom:0;}

/* ============ CTA / 表单 ============ */
.rk-cta{display:grid;grid-template-columns:5fr 7fr;gap:60px;align-items:start;}
.rk-cta__intro .rk-h2{margin-bottom:20px;}
.rk-cta__intro .rk-lead{margin-bottom:32px;}
.rk-cta__points{display:flex;flex-direction:column;gap:16px;}
.rk-cta__points li{display:flex;gap:12px;font-size:15px;color:var(--text-2);}
.rk-cta__points i{color:var(--accent);font-size:13px;margin-top:6px;}
.rk-panel{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:38px 36px 34px;box-shadow:var(--shadow-2);
}
.rk-form{display:flex;flex-direction:column;gap:18px;}
.rk-field{display:flex;flex-direction:column;gap:8px;}
.rk-field label{font-size:13.5px;font-weight:500;color:var(--text-2);letter-spacing:.02em;}
.rk-input,.rk-textarea,.rk-select{
  width:100%;min-height:48px;padding:12px 14px;background:var(--paper);
  border:1px solid var(--border);border-radius:2px;font-size:15px;line-height:1.6;
  transition:border-color .32s var(--ease),background-color .32s var(--ease);
}
.rk-textarea{min-height:104px;resize:vertical;}
.rk-input:hover,.rk-textarea:hover,.rk-select:hover{border-color:#CFC9BE;}
.rk-input:focus,.rk-textarea:focus,.rk-select:focus{outline:none;border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px var(--accent-soft);}
.rk-field.has-error .rk-input,.rk-field.has-error .rk-textarea{border-color:var(--accent);}
.rk-field__err{font-size:13px;color:var(--accent);display:none;}
.rk-field.has-error .rk-field__err{display:block;}
.rk-chips{display:flex;flex-wrap:wrap;gap:10px;}
.rk-chip{
  padding:9px 16px;border:1px solid var(--border);border-radius:999px;background:var(--paper);
  font-size:13.5px;color:var(--text-2);transition:all .32s var(--ease);
}
.rk-chip:hover{border-color:var(--moss);color:var(--ink);}
.rk-chip.is-active{background:var(--ink);border-color:var(--ink);color:var(--paper);}
.rk-consent{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--text-3);line-height:1.7;}
.rk-consent input{
  appearance:none;-webkit-appearance:none;width:16px;height:16px;flex:0 0 auto;margin-top:4px;
  border:1px solid var(--border);border-radius:2px;background:var(--paper);position:relative;cursor:pointer;
  transition:border-color .3s var(--ease),background-color .3s var(--ease);
}
.rk-consent input:checked{border-color:var(--accent);}
.rk-consent input:checked::after{
  content:"";position:absolute;left:4.5px;top:1px;width:5px;height:9px;
  border-right:1.5px solid var(--accent);border-bottom:1.5px solid var(--accent);transform:rotate(42deg);
}
.rk-consent a{color:var(--text-2);border-bottom:1px solid var(--border);}
.rk-consent a:hover{color:var(--accent);border-color:var(--accent);}
.rk-form__note{font-size:12.5px;color:var(--text-3);margin:0;text-align:center;}
.rk-success{display:none;text-align:center;padding:26px 0 10px;}
.rk-success.is-visible{display:block;}
.rk-success i{font-size:30px;color:var(--accent);display:block;margin-bottom:16px;}
.rk-success h3{font-size:21px;margin-bottom:10px;}
.rk-success p{font-size:14.5px;color:var(--text-2);margin:0;}

/* ============ 隐私说明条 ============ */
.rk-privacy{border-top:1px solid var(--divider);padding:22px 0;background:var(--paper-2);}
.rk-privacy__inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:13px;color:var(--text-3);}
.rk-privacy__inner a{color:var(--text-2);border-bottom:1px solid var(--border);}
.rk-privacy__inner a:hover{color:var(--accent);border-color:var(--accent);}

/* ============ 页脚 ============ */
.rk-footer{background:var(--ink);color:rgba(247,245,241,.72);padding:72px 0 0;font-size:14px;}
.rk-footer .rk-container{border-top:0;}
.rk-footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:52px;}
.rk-footer__brand{display:flex;flex-direction:column;gap:16px;}
.rk-footer__logo{display:flex;align-items:center;gap:12px;}
.rk-footer__logo .rk-logo__mark{background:var(--paper);}
.rk-footer__logo .rk-logo__mark::after{background:var(--ink);}
.rk-footer__logo strong{font-family:var(--serif);font-size:17px;color:var(--paper);font-weight:700;}
.rk-footer__slogan{font-family:var(--serif);font-size:19px;color:var(--paper);font-weight:700;letter-spacing:.01em;margin:0;}
.rk-footer__desc{font-size:13.5px;line-height:1.9;color:rgba(247,245,241,.56);margin:0;max-width:320px;}
.rk-footer h4{font-family:var(--sans);font-size:13px;letter-spacing:.16em;color:rgba(247,245,241,.5);font-weight:500;margin-bottom:20px;}
.rk-footer__links{display:flex;flex-direction:column;gap:12px;}
.rk-footer__links a{font-size:14px;color:rgba(247,245,241,.76);transition:color .3s var(--ease);}
.rk-footer__links a:hover{color:var(--accent);}
.rk-footer__contact{display:flex;flex-direction:column;gap:14px;}
.rk-footer__contact p{margin:0;font-size:14px;color:rgba(247,245,241,.76);line-height:1.7;}
.rk-footer__contact strong{color:var(--paper);font-family:var(--serif);font-size:20px;letter-spacing:.02em;}
.rk-footer__bottom{
  border-top:1px solid rgba(247,245,241,.12);padding:24px 0 30px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:rgba(247,245,241,.46);
}
.rk-footer__bottom a{color:rgba(247,245,241,.68);}
.rk-footer__bottom a:hover{color:var(--accent);}
.rk-footer__bottom-links{display:flex;gap:20px;flex-wrap:wrap;}

/* ============ 弹层 ============ */
.rk-modal{position:fixed;inset:0;z-index:200;display:none;}
.rk-modal.is-open{display:block;}
.rk-modal__mask{position:absolute;inset:0;background:rgba(22,24,26,.55);opacity:0;transition:opacity .4s var(--ease);}
.rk-modal.is-open .rk-modal__mask{opacity:1;}
.rk-modal__panel{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-46%);
  width:min(92vw,520px);max-height:92vh;overflow-y:auto;background:var(--card);
  border-radius:var(--radius-card);padding:38px 38px 34px;box-shadow:0 30px 70px rgba(22,24,26,.28);
  opacity:0;transition:opacity .42s var(--ease),transform .42s var(--ease);
}
.rk-modal.is-open .rk-modal__panel{opacity:1;transform:translate(-50%,-50%);}
.rk-modal__close{
  position:absolute;right:14px;top:14px;width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  font-size:22px;color:var(--text-3);transition:color .3s var(--ease);
}
.rk-modal__close:hover{color:var(--accent);}
.rk-modal__panel h3{font-size:23px;margin-bottom:10px;}
.rk-modal__desc{font-size:14px;color:var(--text-2);margin-bottom:24px;}

/* ============ 回到顶部 ============ */
.rk-top{
  position:fixed;right:26px;bottom:26px;width:44px;height:44px;border-radius:50%;
  background:var(--ink);color:var(--paper);display:flex;align-items:center;justify-content:center;
  font-size:15px;opacity:0;pointer-events:none;transform:translateY(10px);z-index:90;
  transition:opacity .42s var(--ease),transform .42s var(--ease),background-color .3s var(--ease);
}
.rk-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0);}
.rk-top:hover{background:var(--accent);color:#fff;}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.is-in{opacity:1;transform:translateY(0);}
.rk-hero h1,.rk-hero__sub,.rk-hero__cta,.rk-hero__trust{opacity:0;transform:translateY(14px);animation:rkRise .7s var(--ease) forwards;}
.rk-hero__sub{animation-delay:.1s;}
.rk-hero__cta{animation-delay:.18s;}
.rk-hero__trust{animation-delay:.26s;}
@keyframes rkRise{to{opacity:1;transform:translateY(0);}}

/* ============ 响应式 ============ */
@media screen and (max-width:1200px){
  .rk-nav{gap:22px;}
  .rk-hero__grid{gap:48px;}
  .rk-footer__grid{grid-template-columns:1.4fr 1fr 1fr;gap:36px;}
  .rk-footer__contact{grid-column:span 3;flex-direction:row;gap:32px;align-items:center;flex-wrap:wrap;}
}
@media screen and (max-width:900px){
  .rk-section{padding:72px 0;}
  .rk-nav{display:none;}
  .rk-header__actions .rk-btn{display:none;}
  .rk-burger{display:flex;}
  .rk-topbar__left span:not(.rk-topbar__dot):not(.rk-topbar__sep){max-width:46vw;overflow:hidden;text-overflow:ellipsis;}
  .rk-topbar__left .rk-topbar__domain{max-width:none;}
  .rk-topbar__right span{display:none;}
  .rk-hero{padding:64px 0 72px;}
  .rk-hero__grid{grid-template-columns:1fr;gap:44px;}
  .rk-hero__text{max-width:none;}
  .rk-hero__frame img{aspect-ratio:16/10;}
  .rk-hero__badge{right:10px;bottom:-18px;}
  .rk-solution{grid-template-columns:1fr;}
  .rk-stack{grid-template-rows:none;grid-template-columns:1fr;}
  .rk-news{grid-template-columns:1fr;gap:32px;}
  .rk-cta{grid-template-columns:1fr;gap:36px;}
  .rk-stats{grid-template-columns:repeat(2,1fr);}
  .rk-stat{border-bottom:1px solid rgba(247,245,241,.14);}
  .rk-stat:nth-child(2n){border-right:0;}
  .rk-footer__grid{grid-template-columns:1fr 1fr;}
  .rk-footer__contact{grid-column:span 2;}
  .rk-trust__list{gap:24px;}
}
@media screen and (max-width:640px){
  body{font-size:15.5px;}
  .grid-container.rk-container{padding:0 18px;}
  .rk-section{padding:56px 0;}
  .rk-section--tight{padding:44px 0;}
  .rk-topbar__inner{height:auto;padding:10px 0;flex-direction:column;align-items:flex-start;gap:6px;}
  .rk-topbar__right{width:100%;justify-content:space-between;}
  .rk-topbar__left span:not(.rk-topbar__dot):not(.rk-topbar__sep){max-width:62vw;}
  .rk-header__inner{height:70px;}
  .rk-logo__text strong{font-size:15.5px;}
  .rk-logo__text em{font-size:10.5px;letter-spacing:.1em;}
  .rk-hero h1{font-size:clamp(28px,7.4vw,36px);}
  .rk-hero__sub{font-size:17px;}
  .rk-hero__cta{gap:18px;flex-direction:column;align-items:stretch;}
  .rk-hero__cta .rk-btn{width:100%;}
  .rk-hero__badge{position:static;margin-top:16px;display:inline-block;}
  .rk-hero__frame::after{display:none;}
  .rk-stats{grid-template-columns:1fr;}
  .rk-stat{border-right:0;padding:28px 4px;}
  .rk-pain{padding:26px 22px;}
  .rk-card__body,.rk-card--mini{padding:26px 22px 28px;}
  .rk-panel{padding:28px 22px 26px;}
  .rk-faq__a-inner{padding-right:20px;}
  .rk-faq__q{font-size:16.5px;padding:22px 2px;}
  .rk-footer{padding-top:56px;}
  .rk-footer__grid{grid-template-columns:1fr;gap:34px;padding-bottom:38px;}
  .rk-footer__contact{grid-column:span 1;flex-direction:column;align-items:flex-start;gap:14px;}
  .rk-footer__bottom{flex-direction:column;align-items:flex-start;}
  .rk-modal__panel{left:0;top:auto;bottom:0;transform:translateY(24px);width:100%;max-width:100%;border-radius:6px 6px 0 0;padding:30px 22px 26px;max-height:90vh;}
  .rk-modal.is-open .rk-modal__panel{transform:translateY(0);}
  .rk-top{right:16px;bottom:16px;}
  .rk-privacy__inner{flex-direction:column;align-items:flex-start;gap:12px;}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  .reveal{opacity:1;transform:none;}
  .rk-hero h1,.rk-hero__sub,.rk-hero__cta,.rk-hero__trust{opacity:1;transform:none;}
}

/* roulang page: article */
:root{
  --ink:#16181A;
  --paper:#F7F5F1;
  --paper-2:#EFEBE4;
  --card:#FFFFFF;
  --accent:#C1502E;
  --jade:#4A5A52;
  --text:#1A1A18;
  --text-2:#5C5F5A;
  --text-3:#8A8D86;
  --line:#E2DED6;
  --divider:#EAE6DF;
  --r-card:6px;
  --r-btn:2px;
  --r-img:4px;
  --shadow-1:0 1px 2px rgba(22,24,26,.04);
  --shadow-2:0 18px 40px rgba(22,24,26,.08);
  --ease:cubic-bezier(.22,.61,.36,1);
  --gap-s:16px;
  --gap-m:28px;
  --gap-l:48px;
  --sect:104px;
  --serif:"Noto Serif SC","Songti SC",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--ink);text-decoration:none;transition:color .35s var(--ease)}
a:hover{color:var(--accent)}
button{font-family:inherit}
h1,h2,h3,h4{
  font-family:var(--serif);
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.35;
  margin:0;
  color:var(--ink);
}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--text)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
::selection{background:rgba(193,80,46,.16)}

.rk-container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.rk-narrow{max-width:760px;margin:0 auto}

/* 顶部信息条 */
.rk-topbar{
  background:var(--ink);
  color:#EFEBE4;
  font-size:12.5px;
  letter-spacing:.02em;
  transition:transform .45s var(--ease),opacity .45s var(--ease);
}
.rk-topbar.is-hidden{transform:translateY(-100%);opacity:0}
.rk-topbar__inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;min-height:36px;line-height:1.6;
}
.rk-topbar__left{display:flex;align-items:center;gap:14px;min-width:0}
.rk-topbar__dot{width:6px;height:6px;background:var(--accent);border-radius:1px;flex:0 0 auto}
.rk-topbar__host{color:#B9B4AA;font-variant-numeric:tabular-nums}
.rk-topbar__right{display:flex;align-items:center;gap:18px;white-space:nowrap}
.rk-topbar__right a{color:#EFEBE4;border-bottom:1px solid rgba(239,235,228,.4);padding-bottom:1px}
.rk-topbar__right a:hover{color:var(--accent);border-color:var(--accent)}

/* 主导航 */
.rk-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,241,.96);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .4s var(--ease),background .4s var(--ease);
}
.rk-header.is-stuck{box-shadow:0 8px 24px rgba(22,24,26,.07)}
.rk-header__inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;min-height:84px;transition:min-height .35s var(--ease);
}
.rk-header.is-stuck .rk-header__inner{min-height:72px}
.rk-logo{display:flex;align-items:center;gap:12px;min-width:0}
.rk-logo__mark{
  width:20px;height:20px;flex:0 0 auto;border-radius:2px;
  background:var(--ink);position:relative;
}
.rk-logo__mark::after{
  content:"";position:absolute;inset:5px;background:var(--paper);border-radius:1px;
}
.rk-logo strong{
  font-family:var(--serif);font-size:19px;font-weight:700;letter-spacing:-.02em;
  color:var(--ink);white-space:nowrap;
}
.rk-logo em{
  font-style:normal;font-size:12px;color:var(--text-3);
  padding-left:12px;margin-left:2px;border-left:1px solid var(--line);
  white-space:nowrap;
}
.rk-nav{display:flex;align-items:center;gap:30px}
.rk-nav a{
  position:relative;font-size:15px;color:var(--text-2);padding:6px 0;
}
.rk-nav a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--accent);transition:width .4s var(--ease);
}
.rk-nav a:hover{color:var(--ink)}
.rk-nav a:hover::after,.rk-nav a.is-active::after{width:100%}
.rk-nav a.is-active{color:var(--ink);font-weight:500}
.rk-header__actions{display:flex;align-items:center;gap:14px}

/* 按钮 */
.rk-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:50px;padding:0 30px;border-radius:var(--r-btn);
  border:1px solid transparent;cursor:pointer;
  font-size:15px;font-weight:500;letter-spacing:.01em;
  transition:background .4s var(--ease),color .4s var(--ease),border-color .4s var(--ease),transform .4s var(--ease);
}
.rk-btn--primary{background:var(--ink);color:#F7F5F1;border-color:var(--ink)}
.rk-btn--primary:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.rk-btn--ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.rk-btn--ghost:hover{background:var(--ink);color:#F7F5F1}
.rk-btn--light{background:transparent;color:#F7F5F1;border-color:rgba(247,245,241,.4)}
.rk-btn--light:hover{background:#F7F5F1;color:var(--ink);border-color:#F7F5F1}
.rk-btn--sm{height:42px;padding:0 20px;font-size:14px}
.rk-btn--block{width:100%}
.rk-btn .rk-arrow{transition:transform .4s var(--ease);display:inline-block}
.rk-btn:hover .rk-arrow{transform:translateX(4px)}
.rk-btn:disabled{opacity:.45;cursor:not-allowed}
.rk-btn.is-loading{opacity:.7;pointer-events:none}

.rk-link{
  position:relative;display:inline-block;font-size:15px;color:var(--ink);
  padding-bottom:2px;font-weight:500;
}
.rk-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--accent);transition:width .45s var(--ease);
}
.rk-link:hover::after{width:100%}
.rk-link .rk-arrow{transition:transform .4s var(--ease)}
.rk-link:hover .rk-arrow{transform:translateX(4px)}

/* 移动端汉堡与抽屉 */
.rk-burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);
  background:transparent;border-radius:var(--r-btn);padding:0;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;
}
.rk-burger span{display:block;width:18px;height:1.5px;background:var(--ink);transition:transform .35s var(--ease),opacity .3s var(--ease)}
.rk-burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.rk-burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.rk-burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.rk-drawer{
  position:fixed;top:0;right:0;width:min(86vw,360px);height:100%;
  background:var(--paper);border-left:1px solid var(--line);z-index:90;
  transform:translateX(102%);transition:transform .45s var(--ease);
  padding:32px 28px;display:flex;flex-direction:column;gap:8px;overflow-y:auto;
}
.rk-drawer.is-open{transform:translateX(0)}
.rk-drawer__title{font-size:12px;letter-spacing:.16em;color:var(--text-3);margin-bottom:12px}
.rk-drawer a{
  font-family:var(--serif);font-size:19px;padding:14px 0;border-bottom:1px solid var(--divider);
  opacity:0;transform:translateY(8px);
}
.rk-drawer.is-open a{opacity:1;transform:translateY(0);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.rk-drawer.is-open a:nth-child(2){transition-delay:.05s}
.rk-drawer.is-open a:nth-child(3){transition-delay:.1s}
.rk-drawer.is-open a:nth-child(4){transition-delay:.15s}
.rk-drawer.is-open a:nth-child(5){transition-delay:.2s}
.rk-drawer .rk-btn{margin-top:24px}
.rk-mask{
  position:fixed;inset:0;background:rgba(22,24,26,.45);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .4s var(--ease),visibility .4s var(--ease);
}
.rk-mask.is-open{opacity:1;visibility:visible}

/* 阅读进度 */
.rk-progress{
  position:fixed;top:0;left:0;height:3px;width:0;z-index:100;
  background:var(--accent);transition:width .12s linear;
}

/* 面包屑 */
.rk-crumb{padding:28px 0 0;font-size:13px;color:var(--text-3)}
.rk-crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.rk-crumb li{display:flex;align-items:center;gap:8px}
.rk-crumb li+li::before{content:"/";color:#C6C2B9}
.rk-crumb a{color:var(--text-2)}
.rk-crumb a:hover{color:var(--accent)}
.rk-crumb [aria-current]{color:var(--text-3)}

/* 文章头部 */
.rk-article-head{padding:36px 0 40px;border-bottom:1px solid var(--line)}
.rk-article-head__inner{max-width:820px}
.rk-badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border:1px solid var(--line);border-radius:999px;background:var(--paper-2);
  font-size:12.5px;color:var(--jade);letter-spacing:.02em;
}
.rk-article-head h1{
  font-size:clamp(28px,4vw,44px);
  margin:20px 0 0;font-weight:900;
}
.rk-article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  margin-top:22px;font-size:13.5px;color:var(--text-3);
  font-variant-numeric:tabular-nums;
}
.rk-article-meta span{position:relative}
.rk-article-meta span+span::before{
  content:"";position:absolute;left:-12px;top:50%;width:3px;height:3px;
  background:#C6C2B9;border-radius:50%;transform:translateY(-50%);
}
.rk-article-lead{
  margin-top:24px;font-size:18px;line-height:1.95;color:var(--text-2);
  padding-left:20px;border-left:2px solid var(--accent);
}

/* 布局：正文 + 粘性侧栏 */
.rk-article-wrap{
  display:grid;grid-template-columns:minmax(0,1fr) 260px;
  gap:64px;align-items:start;padding:56px 0 0;
}
.rk-prose{max-width:760px;font-size:17px;line-height:1.9;color:#2A2B28}
.rk-prose>*+*{margin-top:1.2em}
.rk-prose h2{
  font-size:26px;margin:46px 0 18px;padding-left:16px;position:relative;
}
.rk-prose h2::before{
  content:"";position:absolute;left:0;top:.28em;width:3px;height:1em;background:var(--accent);
}
.rk-prose h3{font-size:20px;margin:34px 0 14px;font-weight:700}
.rk-prose p{color:#2A2B28}
.rk-prose a{color:var(--accent);border-bottom:1px solid rgba(193,80,46,.35)}
.rk-prose a:hover{border-color:var(--accent)}
.rk-prose strong{color:var(--ink);font-weight:700}
.rk-prose ul,.rk-prose ol{padding-left:22px;color:#2A2B28}
.rk-prose ul{list-style:none}
.rk-prose ul li{position:relative;padding-left:20px;margin-bottom:10px}
.rk-prose ul li::before{
  content:"";position:absolute;left:0;top:.78em;width:6px;height:6px;
  background:var(--accent);border-radius:1px;
}
.rk-prose ol{list-style:decimal}
.rk-prose ol li{margin-bottom:10px}
.rk-prose ol li::marker{color:var(--accent);font-weight:700}
.rk-prose blockquote{
  margin:32px 0;padding:22px 26px;background:var(--paper-2);
  border-left:3px solid var(--accent);border-radius:0 var(--r-card) var(--r-card) 0;
  color:#3A3B37;font-size:16.5px;
}
.rk-prose blockquote p:last-child{margin-bottom:0}
.rk-prose img{margin:32px auto;border:1px solid var(--line);border-radius:var(--r-img)}
.rk-prose figure{margin:32px 0}
.rk-prose figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px}
.rk-prose table{width:100%;border-collapse:collapse;font-size:15px;margin:28px 0}
.rk-prose th,.rk-prose td{border:1px solid var(--line);padding:12px 14px;text-align:left}
.rk-prose th{background:var(--paper-2);font-weight:600;color:var(--ink)}
.rk-prose code{
  background:var(--paper-2);padding:2px 7px;border-radius:3px;
  font-size:14px;color:#8C3B22;
}
.rk-prose pre{
  background:var(--ink);color:#EDE9E1;padding:22px;border-radius:var(--r-card);
  overflow-x:auto;font-size:14px;line-height:1.7;
}
.rk-prose pre code{background:transparent;color:inherit;padding:0}

/* 无内容空态 */
.rk-empty{
  border:1px dashed var(--line);border-radius:var(--r-card);
  background:var(--card);padding:64px 32px;text-align:center;
}
.rk-empty__mark{
  width:44px;height:44px;margin:0 auto 20px;border:1px solid var(--line);
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  color:var(--accent);font-size:18px;
}
.rk-empty h2{font-size:22px;margin-bottom:12px}
.rk-empty p{color:var(--text-2);font-size:15.5px;margin-bottom:24px}

/* 侧栏 */
.rk-side{position:sticky;top:112px;display:flex;flex-direction:column;gap:20px}
.rk-side__card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-1);
}
.rk-side__card h3{font-size:16px;margin-bottom:12px}
.rk-side__card p{font-size:14px;color:var(--text-2);line-height:1.8;margin-bottom:18px}
.rk-side__list{display:flex;flex-direction:column}
.rk-side__list a{
  font-size:14.5px;color:var(--text-2);padding:11px 0;border-top:1px solid var(--divider);
  display:flex;justify-content:space-between;align-items:center;gap:10px;
}
.rk-side__list a:first-child{border-top:0}
.rk-side__card--ink{background:var(--ink);border-color:var(--ink);color:#EFEBE4}
.rk-side__card--ink h3{color:#F7F5F1}
.rk-side__card--ink p{color:#B9B4AA}
.rk-side__card--ink .rk-btn--light{margin-top:4px}

/* 标签 */
.rk-tags{
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;
  margin-top:52px;padding-top:28px;border-top:1px solid var(--line);
}
.rk-tags__label{font-size:13px;color:var(--text-3);margin-right:6px}
.rk-tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;
  border:1px solid var(--line);border-radius:999px;font-size:13px;color:var(--text-2);
  background:var(--card);transition:border-color .35s var(--ease),color .35s var(--ease);
}
.rk-tag:hover{border-color:var(--accent);color:var(--accent)}

.rk-backline{
  margin-top:26px;display:flex;flex-wrap:wrap;gap:16px 28px;align-items:center;
}

/* 相关推荐 */
.rk-section{padding:var(--sect) 0}
.rk-section--tight{padding:72px 0}
.rk-section__head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:44px;
}
.rk-section__head h2{font-size:clamp(24px,3vw,34px)}
.rk-eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:12.5px;
  letter-spacing:.16em;color:var(--text-3);margin-bottom:14px;
}
.rk-eyebrow::before{content:"";width:22px;height:1px;background:var(--accent)}
.rk-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.rk-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .5s var(--ease),border-color .5s var(--ease),box-shadow .5s var(--ease);
}
.rk-card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:var(--shadow-2)}
.rk-card__media{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--paper-2)}
.rk-card__media img{
  width:100%;height:100%;object-fit:cover;border-radius:0;
  transition:transform .6s var(--ease);
}
.rk-card:hover .rk-card__media img{transform:scale(1.03)}
.rk-card__badge{
  position:absolute;left:14px;top:14px;
  background:rgba(247,245,241,.94);border:1px solid var(--line);
  border-radius:999px;height:26px;padding:0 12px;display:inline-flex;align-items:center;
  font-size:12.5px;color:var(--jade);
}
.rk-card__body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.rk-card__body h3{font-size:18.5px;line-height:1.5}
.rk-card__body p{font-size:14.5px;color:var(--text-2);line-height:1.8;margin:0}
.rk-card__foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums;
}

/* CTA 表单带 */
.rk-cta{
  background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.rk-cta__grid{
  display:grid;grid-template-columns:5fr 7fr;gap:64px;align-items:start;
  padding:var(--sect) 0;
}
.rk-cta__grid h2{font-size:clamp(24px,3vw,34px);margin-bottom:20px}
.rk-cta__grid p{color:var(--text-2);font-size:16px}
.rk-cta__points{margin-top:26px;display:flex;flex-direction:column;gap:12px}
.rk-cta__points li{
  display:flex;gap:12px;font-size:15px;color:var(--text-2);align-items:flex-start;
}
.rk-cta__points li::before{
  content:"";flex:0 0 auto;width:6px;height:6px;margin-top:.72em;
  background:var(--accent);border-radius:1px;
}
.rk-form{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:36px;box-shadow:var(--shadow-1);
}
.rk-field{margin-bottom:18px}
.rk-field label{display:block;font-size:13.5px;color:var(--text-2);margin-bottom:8px}
.rk-field input,.rk-field select,.rk-field textarea{
  width:100%;border:1px solid var(--line);background:var(--paper);
  border-radius:var(--r-btn);padding:12px 14px;transition:border-color .3s var(--ease),background .3s var(--ease);
}
.rk-field input:focus,.rk-field select:focus,.rk-field textarea:focus{
  border-color:var(--ink);background:#fff;outline:none;
}
.rk-field textarea{resize:vertical;min-height:104px}
.rk-field.is-error input,.rk-field.is-error textarea,.rk-field.is-error select{border-color:var(--accent)}
.rk-field__err{display:none;font-size:13px;color:var(--accent);margin-top:6px}
.rk-field.is-error .rk-field__err{display:block}
.rk-chips{display:flex;flex-wrap:wrap;gap:10px}
.rk-chip{
  border:1px solid var(--line);background:var(--paper);border-radius:999px;
  padding:8px 16px;font-size:14px;color:var(--text-2);cursor:pointer;
  transition:border-color .3s var(--ease),color .3s var(--ease),background .3s var(--ease);
}
.rk-chip:hover{border-color:var(--ink);color:var(--ink)}
.rk-chip.is-on{background:var(--ink);border-color:var(--ink);color:#F7F5F1}
.rk-consent{
  display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--text-3);
  margin:6px 0 20px;line-height:1.7;
}
.rk-consent input{
  appearance:none;width:16px;height:16px;flex:0 0 auto;margin-top:3px;
  border:1px solid var(--line);border-radius:2px;background:var(--paper);cursor:pointer;
  transition:border-color .3s var(--ease),background .3s var(--ease);
}
.rk-consent input:checked{border-color:var(--accent);background:var(--accent)}
.rk-consent a{color:var(--text-2);border-bottom:1px solid var(--line)}
.rk-consent a:hover{color:var(--accent);border-color:var(--accent)}
.rk-form__note{font-size:13px;color:var(--text-3);margin-top:14px;text-align:center}
.rk-form__ok{display:none;text-align:center;padding:28px 8px}
.rk-form__ok.is-on{display:block}
.rk-form__ok .rk-ok-mark{
  width:52px;height:52px;margin:0 auto 18px;border-radius:50%;
  border:1px solid var(--accent);color:var(--accent);
  display:flex;align-items:center;justify-content:center;font-size:22px;
}
.rk-form__ok h3{margin-bottom:10px}
.rk-form__ok p{font-size:15px;color:var(--text-2)}

/* 隐私说明条 */
.rk-privacy{
  padding:22px 0;font-size:13px;color:var(--text-3);
  border-bottom:1px solid var(--line);
}
.rk-privacy .rk-container{display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center;justify-content:space-between}
.rk-privacy a{border-bottom:1px solid var(--line);color:var(--text-2)}
.rk-privacy a:hover{color:var(--accent);border-color:var(--accent)}

/* 页脚 */
.rk-footer{background:var(--ink);color:#D9D5CC;font-size:14px;padding:72px 0 26px}
.rk-footer__grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px;
  padding-bottom:44px;border-bottom:1px solid rgba(239,235,228,.14);
}
.rk-footer__logo{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.rk-footer__logo .rk-logo__mark{background:#F7F5F1}
.rk-footer__logo .rk-logo__mark::after{background:var(--ink)}
.rk-footer__logo strong{font-family:var(--serif);font-size:18px;color:#F7F5F1}
.rk-footer__slogan{
  font-family:var(--serif);font-size:17px;color:#F7F5F1;margin-bottom:12px;letter-spacing:-.01em;
}
.rk-footer__desc{font-size:13.5px;line-height:1.85;color:#9E9A92;max-width:340px}
.rk-footer h4{
  font-family:var(--sans);font-size:12.5px;letter-spacing:.16em;color:#8E8A82;
  font-weight:500;margin-bottom:18px;
}
.rk-footer__links{display:flex;flex-direction:column;gap:12px}
.rk-footer a{color:#D9D5CC}
.rk-footer a:hover{color:var(--accent)}
.rk-footer__contact strong{
  display:block;font-family:var(--serif);font-size:24px;color:#F7F5F1;
  font-variant-numeric:tabular-nums;margin-bottom:8px;
}
.rk-footer__contact p{font-size:13.5px;color:#9E9A92;margin-bottom:10px}
.rk-footer__contact .rk-btn{margin-top:8px}
.rk-footer__bottom{
  padding-top:22px;display:flex;flex-wrap:wrap;gap:12px 24px;
  align-items:center;justify-content:space-between;
  font-size:13px;color:#8E8A82;
}
.rk-footer__bottom-links{display:flex;flex-wrap:wrap;gap:18px}

/* 回到顶部 */
.rk-top{
  position:fixed;right:24px;bottom:28px;width:44px;height:44px;border-radius:50%;
  background:var(--ink);color:#F7F5F1;border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:center;z-index:70;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .4s var(--ease),transform .4s var(--ease),visibility .4s var(--ease),background .4s var(--ease);
}
.rk-top.is-on{opacity:1;visibility:visible;transform:translateY(0)}
.rk-top:hover{background:var(--accent)}

/* 弹层表单 */
.rk-modal{
  position:fixed;inset:0;z-index:120;display:flex;align-items:center;justify-content:center;
  padding:24px;opacity:0;visibility:hidden;
  transition:opacity .4s var(--ease),visibility .4s var(--ease);
}
.rk-modal.is-open{opacity:1;visibility:visible}
.rk-modal__mask{position:absolute;inset:0;background:rgba(22,24,26,.55)}
.rk-modal__panel{
  position:relative;background:#fff;border-radius:var(--r-card);width:100%;max-width:520px;
  padding:38px;max-height:88vh;overflow-y:auto;
  transform:translateY(14px);transition:transform .45s var(--ease);
}
.rk-modal.is-open .rk-modal__panel{transform:translateY(0)}
.rk-modal__close{
  position:absolute;right:18px;top:18px;width:36px;height:36px;border:1px solid var(--line);
  background:transparent;border-radius:var(--r-btn);cursor:pointer;color:var(--text-2);
  display:flex;align-items:center;justify-content:center;font-size:16px;
  transition:border-color .3s var(--ease),color .3s var(--ease);
}
.rk-modal__close:hover{border-color:var(--accent);color:var(--accent)}
.rk-modal__panel h3{font-size:22px;margin-bottom:10px}
.rk-modal__panel>p{font-size:14.5px;color:var(--text-2);margin-bottom:24px}

/* 动效 */
.rk-rise{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.rk-rise.is-in{opacity:1;transform:translateY(0)}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important}
  .rk-rise{opacity:1;transform:none}
}

@media (max-width:1200px){
  .rk-article-wrap{grid-template-columns:minmax(0,1fr);gap:48px}
  .rk-side{position:static;flex-direction:row;flex-wrap:wrap}
  .rk-side__card{flex:1 1 280px}
  .rk-footer__grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media (max-width:1024px){
  :root{--sect:88px}
  .rk-nav{display:none}
  .rk-burger{display:flex}
  .rk-logo em{display:none}
  .rk-cta__grid{grid-template-columns:1fr;gap:40px;padding:80px 0}
  .rk-grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
  :root{--sect:68px}
  body{font-size:16px}
  .rk-topbar__right a{display:none}
  .rk-header__inner{min-height:68px}
  .rk-logo strong{font-size:17px;white-space:normal}
  .rk-header__actions .rk-btn{display:none}
  .rk-article-head{padding:26px 0 32px}
  .rk-article-lead{font-size:16.5px}
  .rk-section__head{flex-direction:column;align-items:flex-start;gap:14px}
  .rk-form{padding:26px}
  .rk-grid-3{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:520px){
  .rk-container{padding:0 18px}
  .rk-topbar__inner{font-size:12px}
  .rk-topbar__right{display:none}
  .rk-prose{font-size:15.8px}
  .rk-prose h2{font-size:22px;margin-top:36px}
  .rk-modal{padding:0;align-items:flex-end}
  .rk-modal__panel{max-width:none;border-radius:6px 6px 0 0;padding:28px 22px;max-height:92vh}
  .rk-footer__grid{grid-template-columns:1fr;gap:32px}
  .rk-top{right:16px;bottom:18px}
}

/* roulang page: category1 */
:root{
  --ink:#16181A;
  --paper:#F7F5F1;
  --paper-2:#EFEBE4;
  --card:#FFFFFF;
  --cinnabar:#C1502E;
  --pine:#4A5A52;
  --text:#1A1A18;
  --text-2:#5C5F5A;
  --text-3:#8A8D86;
  --line:#E2DED6;
  --line-2:#EAE6DF;
  --r-card:6px;
  --r-btn:2px;
  --r-img:4px;
  --shadow-0:0 1px 2px rgba(22,24,26,.04);
  --shadow-1:0 18px 40px rgba(22,24,26,.08);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--ink);text-decoration:none;transition:color .35s var(--ease);}
p{margin:0 0 1.2em;}
h1,h2,h3,h4{font-family:var(--serif);color:var(--ink);margin:0;letter-spacing:-.02em;line-height:1.3;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
.grid-container.rk-container{max-width:1200px;padding-left:24px;padding-right:24px;}
:focus-visible{outline:2px solid var(--cinnabar);outline-offset:2px;}
.rk-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ---------- 顶部信息条 ---------- */
.rk-topbar{
  background:var(--ink);
  color:#EFEBE4;
  font-size:12.5px;
  letter-spacing:.04em;
  overflow:hidden;
  max-height:40px;
  transition:max-height .45s var(--ease),opacity .35s var(--ease);
}
.rk-topbar.is-hidden{max-height:0;opacity:0;}
.rk-topbar__inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:36px;padding:4px 0;flex-wrap:wrap;
}
.rk-topbar__left{display:flex;align-items:center;gap:12px;color:#C9C5BC;}
.rk-topbar__left b{color:#F7F5F1;font-weight:600;letter-spacing:.06em;}
.rk-topbar__dot{width:4px;height:4px;background:var(--cinnabar);border-radius:50%;display:inline-block;}
.rk-topbar__right{display:flex;align-items:center;gap:18px;}
.rk-topbar__right a{color:#EFEBE4;font-size:12.5px;border-bottom:1px solid rgba(239,235,228,.35);padding-bottom:1px;}
.rk-topbar__right a:hover{color:var(--cinnabar);border-color:var(--cinnabar);}

/* ---------- 主导航 ---------- */
.rk-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,241,.95);
  border-bottom:1px solid var(--line);
  transition:box-shadow .4s var(--ease);
}
.rk-header.is-scrolled{box-shadow:0 8px 26px rgba(22,24,26,.07);}
.rk-header__inner{display:flex;align-items:center;gap:28px;height:84px;transition:height .4s var(--ease);}
.rk-header.is-scrolled .rk-header__inner{height:70px;}
.rk-logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.rk-logo__mark{
  width:14px;height:14px;background:var(--ink);display:inline-block;
  position:relative;flex-shrink:0;
}
.rk-logo__mark::after{
  content:"";position:absolute;right:-4px;bottom:-4px;width:8px;height:8px;
  background:var(--cinnabar);
}
.rk-logo strong{font-family:var(--serif);font-size:19px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;}
.rk-nav{display:flex;align-items:center;gap:26px;margin-left:auto;}
.rk-nav a{
  position:relative;font-size:15px;color:var(--text-2);padding:6px 0;white-space:nowrap;
}
.rk-nav a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--cinnabar);
  transition:width .4s var(--ease);
}
.rk-nav a:hover{color:var(--ink);}
.rk-nav a:hover::after{width:100%;}
.rk-nav a.is-active{color:var(--ink);font-weight:600;}
.rk-nav a.is-active::after{width:100%;}
.rk-header__cta{flex-shrink:0;}

/* ---------- 按钮 ---------- */
.rk-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:50px;padding:0 30px;border-radius:var(--r-btn);border:1px solid var(--ink);
  background:var(--ink);color:#F7F5F1;font-size:15px;font-weight:600;letter-spacing:.02em;
  cursor:pointer;transition:background .4s var(--ease),color .4s var(--ease),border-color .4s var(--ease),transform .4s var(--ease);
}
.rk-btn i{transition:transform .4s var(--ease);font-size:13px;}
.rk-btn:hover{background:var(--cinnabar);border-color:var(--cinnabar);color:#fff;}
.rk-btn:hover i{transform:translateX(4px);}
.rk-btn:active{transform:translateY(1px);}
.rk-btn:disabled{opacity:.45;cursor:not-allowed;background:var(--text-3);border-color:var(--text-3);}
.rk-btn--ghost{background:transparent;color:var(--ink);}
.rk-btn--ghost:hover{background:var(--ink);border-color:var(--ink);color:#F7F5F1;}
.rk-btn--light{background:transparent;border-color:#EFEBE4;color:#F7F5F1;}
.rk-btn--light:hover{background:var(--cinnabar);border-color:var(--cinnabar);}
.rk-btn--sm{height:40px;padding:0 20px;font-size:13.5px;}
.rk-btn--block{width:100%;}
.rk-link{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;color:var(--ink);padding-bottom:3px;
}
.rk-link::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--cinnabar);
  transition:width .45s var(--ease);
}
.rk-link:hover::after{width:100%;}
.rk-link i{font-size:12px;transition:transform .4s var(--ease);}
.rk-link:hover i{transform:translateX(4px);}

/* ---------- 移动端导航 ---------- */
.rk-burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:transparent;
  border-radius:var(--r-btn);cursor:pointer;align-items:center;justify-content:center;
}
.rk-burger span{display:block;width:18px;height:1.5px;background:var(--ink);position:relative;}
.rk-burger span::before,.rk-burger span::after{
  content:"";position:absolute;left:0;width:18px;height:1.5px;background:var(--ink);
}
.rk-burger span::before{top:-6px;}
.rk-burger span::after{top:6px;}
.rk-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);background:var(--paper);
  border-left:1px solid var(--line);z-index:90;padding:28px 24px;
  transform:translateX(100%);transition:transform .5s var(--ease);
  display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.rk-drawer.is-open{transform:translateX(0);}
.rk-drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.rk-drawer__head strong{font-family:var(--serif);font-size:17px;}
.rk-drawer__close{width:44px;height:44px;border:1px solid var(--line);background:transparent;border-radius:var(--r-btn);cursor:pointer;font-size:15px;color:var(--ink);}
.rk-drawer a{
  font-size:16px;padding:14px 0;border-bottom:1px solid var(--line-2);opacity:0;
  transform:translateX(12px);transition:opacity .45s var(--ease),transform .45s var(--ease);
}
.rk-drawer.is-open a{opacity:1;transform:translateX(0);}
.rk-drawer.is-open a:nth-child(2){transition-delay:.06s;}
.rk-drawer.is-open a:nth-child(3){transition-delay:.12s;}
.rk-drawer.is-open a:nth-child(4){transition-delay:.18s;}
.rk-drawer.is-open a:nth-child(5){transition-delay:.24s;}
.rk-drawer a.is-active{color:var(--cinnabar);font-weight:600;}
.rk-drawer .rk-btn{margin-top:22px;}
.rk-overlay{
  position:fixed;inset:0;background:rgba(22,24,26,.55);z-index:80;opacity:0;visibility:hidden;
  transition:opacity .4s var(--ease),visibility .4s var(--ease);
}
.rk-overlay.is-open{opacity:1;visibility:visible;}

/* ---------- 面包屑 ---------- */
.rk-crumb{padding:26px 0 0;font-size:12.5px;color:var(--text-3);letter-spacing:.04em;}
.rk-crumb a{color:var(--text-3);}
.rk-crumb a:hover{color:var(--cinnabar);}
.rk-crumb span.sep{margin:0 8px;color:var(--line);}
.rk-crumb span.now{color:var(--text-2);}

/* ---------- 页头 ---------- */
.rk-hero{padding:44px 0 88px;}
.rk-hero__grid{display:grid;grid-template-columns:7fr 5fr;gap:60px;align-items:center;}
.rk-eyebrow{
  display:inline-flex;align-items:center;gap:9px;font-size:12.5px;letter-spacing:.16em;
  color:var(--cinnabar);text-transform:uppercase;margin-bottom:22px;font-weight:600;
}
.rk-eyebrow::before{content:"";width:22px;height:1px;background:var(--cinnabar);display:inline-block;}
.rk-hero h1{
  font-size:clamp(32px,4.6vw,56px);font-weight:900;line-height:1.2;margin-bottom:24px;
}
.rk-hero h1 em{font-style:normal;position:relative;white-space:nowrap;}
.rk-hero h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:8px;background:rgba(193,80,46,.16);z-index:-1;
}
.rk-hero__lead{font-size:18px;color:var(--text-2);max-width:600px;margin-bottom:32px;}
.rk-hero__actions{display:flex;align-items:center;gap:24px;flex-wrap:wrap;margin-bottom:26px;}
.rk-hero__trust{font-size:13.5px;color:var(--text-3);display:flex;align-items:center;gap:10px;}
.rk-hero__trust b{font-family:var(--sans);color:var(--ink);font-weight:700;font-variant-numeric:tabular-nums;}
.rk-hero__media{position:relative;}
.rk-hero__media img{
  width:100%;aspect-ratio:4/5;object-fit:cover;border:1px solid var(--line);
  box-shadow:var(--shadow-0);
}
.rk-hero__frame{
  position:absolute;left:-18px;top:-18px;width:120px;height:120px;
  border-top:2px solid var(--cinnabar);border-left:2px solid var(--cinnabar);pointer-events:none;
}
.rk-badge{
  position:absolute;right:-14px;bottom:26px;background:var(--card);border:1px solid var(--line);
  border-radius:999px;padding:9px 18px;font-size:13px;color:var(--pine);letter-spacing:.04em;
  box-shadow:var(--shadow-0);
}
.rk-badge b{color:var(--ink);font-weight:700;font-variant-numeric:tabular-nums;}

/* ---------- 锚点导航 ---------- */
.rk-anchors{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--paper-2);
}
.rk-anchors__inner{display:flex;gap:34px;flex-wrap:wrap;padding:18px 0;}
.rk-anchors a{
  font-size:14px;color:var(--text-2);display:inline-flex;align-items:center;gap:8px;
}
.rk-anchors a i{font-size:11px;color:var(--cinnabar);}
.rk-anchors a:hover{color:var(--cinnabar);}

/* ---------- 通用板块 ---------- */
.rk-section{padding:96px 0;}
.rk-section--alt{background:var(--paper-2);}
.rk-section__head{max-width:720px;margin-bottom:52px;}
.rk-section__head h2{font-size:clamp(26px,3vw,38px);font-weight:800;margin-bottom:18px;}
.rk-section__head p{color:var(--text-2);font-size:16.5px;margin:0;}
.rk-section__eyebrow{
  font-size:12.5px;letter-spacing:.18em;color:var(--cinnabar);font-weight:600;
  display:block;margin-bottom:14px;
}

/* ---------- 分节图文 ---------- */
.rk-split{
  display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;
  padding:56px 0;border-top:1px solid var(--line-2);
}
.rk-split:first-of-type{border-top:0;padding-top:0;}
.rk-split--rev .rk-split__media{order:-1;}
.rk-split__num{
  font-family:var(--serif);font-size:44px;font-weight:900;color:var(--cinnabar);
  line-height:1;margin-bottom:18px;display:block;font-variant-numeric:tabular-nums;
}
.rk-split h3{font-size:clamp(22px,2.3vw,28px);font-weight:800;margin-bottom:16px;}
.rk-split p{color:var(--text-2);}
.rk-split__media img{width:100%;aspect-ratio:4/3;object-fit:cover;border:1px solid var(--line);transition:transform .6s var(--ease);}
.rk-split__media{overflow:hidden;border-radius:var(--r-img);}
.rk-split__media:hover img{transform:scale(1.03);}
.rk-points{margin-top:22px;display:grid;gap:12px;}
.rk-points li{display:flex;gap:12px;font-size:15px;color:var(--text-2);line-height:1.8;}
.rk-points li i{color:var(--cinnabar);font-size:12px;margin-top:9px;flex-shrink:0;}

/* ---------- 对照块 ---------- */
.rk-compare{display:grid;grid-template-columns:1fr 1fr;gap:28px;}
.rk-compare__card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:38px 34px;transition:transform .45s var(--ease),box-shadow .45s var(--ease),border-color .45s var(--ease);
}
.rk-compare__card:hover{transform:translateY(-4px);box-shadow:var(--shadow-1);border-color:var(--cinnabar);}
.rk-tag{
  display:inline-block;font-size:12px;letter-spacing:.08em;color:var(--pine);
  border:1px solid var(--line);border-radius:999px;padding:4px 13px;background:var(--paper);
  margin-bottom:20px;
}
.rk-compare__card h3{font-size:22px;font-weight:800;margin-bottom:12px;}
.rk-compare__card > p{color:var(--text-2);font-size:15px;min-height:56px;}
.rk-compare__list{border-top:1px solid var(--line-2);margin-top:22px;padding-top:22px;display:grid;gap:13px;}
.rk-compare__list li{display:flex;gap:12px;font-size:14.5px;color:var(--text-2);line-height:1.75;}
.rk-compare__list li i{color:var(--pine);font-size:12px;margin-top:8px;flex-shrink:0;}
.rk-compare__card--dark{background:var(--ink);border-color:var(--ink);}
.rk-compare__card--dark h3{color:#F7F5F1;}
.rk-compare__card--dark > p{color:#B9B6AE;}
.rk-compare__card--dark .rk-tag{background:transparent;border-color:rgba(239,235,228,.28);color:#D8D4CB;}
.rk-compare__card--dark .rk-compare__list{border-color:rgba(239,235,228,.16);}
.rk-compare__card--dark .rk-compare__list li{color:#C9C5BC;}
.rk-compare__card--dark .rk-compare__list li i{color:var(--cinnabar);}

/* ---------- FAQ ---------- */
.rk-faq{border-top:1px solid var(--line);}
.rk-faq__item{border-bottom:1px solid var(--line);}
.rk-faq__q{
  width:100%;background:transparent;border:0;padding:26px 46px 26px 0;text-align:left;cursor:pointer;
  font-size:17px;font-weight:700;color:var(--ink);font-family:var(--sans);position:relative;line-height:1.6;
  transition:color .35s var(--ease);
}
.rk-faq__q:hover{color:var(--cinnabar);}
.rk-faq__q::after{
  content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);
  font-size:24px;font-weight:400;color:var(--cinnabar);transition:transform .45s var(--ease);
}
.rk-faq__item.is-open .rk-faq__q::after{transform:translateY(-50%) rotate(135deg);}
.rk-faq__a{max-height:0;overflow:hidden;transition:max-height .5s var(--ease);}
.rk-faq__a p{padding:0 60px 26px 0;margin:0;color:var(--text-2);font-size:15px;line-height:1.9;}

/* ---------- 表单带 ---------- */
.rk-formband{background:var(--ink);color:#EFEBE4;padding:88px 0;}
.rk-formband__grid{display:grid;grid-template-columns:5fr 7fr;gap:64px;align-items:start;}
.rk-formband h2{color:#F7F5F1;font-size:clamp(24px,2.8vw,34px);font-weight:800;margin-bottom:18px;}
.rk-formband p{color:#B9B6AE;font-size:15.5px;}
.rk-formband__meta{margin-top:30px;border-top:1px solid rgba(239,235,228,.16);padding-top:24px;display:grid;gap:10px;}
.rk-formband__meta span{font-size:13.5px;color:#C9C5BC;display:flex;align-items:center;gap:10px;}
.rk-formband__meta span i{color:var(--cinnabar);font-size:12px;}
.rk-form{
  background:#FFFFFF;border-radius:var(--r-card);padding:36px 34px;color:var(--text);
  box-shadow:0 24px 60px rgba(0,0,0,.22);
}
.rk-form__row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.rk-field{margin-bottom:18px;display:flex;flex-direction:column;gap:8px;}
.rk-field label{font-size:13.5px;color:var(--text-2);font-weight:600;}
.rk-field input,.rk-field select,.rk-field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--r-btn);background:var(--paper);
  padding:12px 14px;font-size:15px;font-family:var(--sans);color:var(--text);
  transition:border-color .35s var(--ease),background .35s var(--ease);
}
.rk-field textarea{resize:vertical;min-height:96px;line-height:1.8;}
.rk-field input:focus,.rk-field select:focus,.rk-field textarea:focus{
  outline:none;border-color:var(--ink);background:#fff;
}
.rk-field input:focus-visible,.rk-field select:focus-visible,.rk-field textarea:focus-visible{
  outline:2px solid var(--cinnabar);outline-offset:1px;
}
.rk-field.is-error input,.rk-field.is-error select,.rk-field.is-error textarea{border-color:var(--cinnabar);}
.rk-field__err{font-size:13px;color:var(--cinnabar);display:none;}
.rk-field.is-error .rk-field__err{display:block;}
.rk-chips{display:flex;flex-wrap:wrap;gap:10px;}
.rk-chip{
  border:1px solid var(--line);border-radius:999px;padding:7px 16px;font-size:13.5px;color:var(--text-2);
  cursor:pointer;background:var(--paper);transition:all .35s var(--ease);
}
.rk-chip:hover{border-color:var(--ink);color:var(--ink);}
.rk-chip.is-on{background:var(--ink);border-color:var(--ink);color:#F7F5F1;}
.rk-privacy{display:flex;align-items:flex-start;gap:10px;margin:6px 0 22px;font-size:13px;color:var(--text-3);line-height:1.7;}
.rk-privacy input{
  appearance:none;width:16px;height:16px;border:1px solid var(--line);border-radius:2px;
  margin-top:3px;flex-shrink:0;cursor:pointer;position:relative;background:#fff;
  transition:border-color .3s var(--ease);
}
.rk-privacy input:checked{border-color:var(--cinnabar);}
.rk-privacy input:checked::after{
  content:"";position:absolute;left:4.5px;top:1.5px;width:4px;height:8px;
  border-right:2px solid var(--cinnabar);border-bottom:2px solid var(--cinnabar);transform:rotate(45deg);
}
.rk-privacy a{color:var(--text-2);text-decoration:underline;text-underline-offset:3px;}
.rk-privacy a:hover{color:var(--cinnabar);}
.rk-form__success{display:none;text-align:center;padding:30px 10px;}
.rk-form__success i{font-size:34px;color:var(--cinnabar);display:block;margin-bottom:16px;}
.rk-form__success h3{font-size:20px;margin-bottom:10px;}
.rk-form__success p{color:var(--text-2);font-size:14.5px;margin:0;}
.rk-form.is-done .rk-form__body{display:none;}
.rk-form.is-done .rk-form__success{display:block;}

/* ---------- 隐私说明条 ---------- */
.rk-privacybar{background:var(--paper-2);border-top:1px solid var(--line);padding:18px 0;}
.rk-privacybar__inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:13px;color:var(--text-3);}
.rk-privacybar a{color:var(--text-2);border-bottom:1px solid var(--line);}
.rk-privacybar a:hover{color:var(--cinnabar);border-color:var(--cinnabar);}

/* ---------- 页脚 ---------- */
.rk-footer{background:var(--ink);color:#C9C5BC;padding:72px 0 0;font-size:14px;}
.rk-footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:52px;border-bottom:1px solid rgba(239,235,228,.14);}
.rk-footer__logo{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.rk-footer__logo .rk-logo__mark{background:#F7F5F1;}
.rk-footer__logo .rk-logo__mark::after{background:var(--cinnabar);}
.rk-footer__logo strong{font-family:var(--serif);color:#F7F5F1;font-size:18px;}
.rk-footer__slogan{color:#EFEBE4;font-size:14.5px;margin-bottom:12px;font-family:var(--serif);letter-spacing:.02em;}
.rk-footer__desc{color:#96938C;font-size:13.5px;line-height:1.85;margin:0;}
.rk-footer h4{color:#F7F5F1;font-size:14px;font-family:var(--sans);font-weight:700;margin-bottom:18px;letter-spacing:.06em;}
.rk-footer__links{display:grid;gap:11px;}
.rk-footer__links a{color:#C9C5BC;font-size:13.5px;}
.rk-footer__links a:hover{color:var(--cinnabar);}
.rk-footer__contact strong{display:block;color:#F7F5F1;font-size:20px;font-family:var(--serif);margin-bottom:10px;letter-spacing:.01em;}
.rk-footer__contact p{font-size:13.5px;color:#96938C;margin:0 0 8px;}
.rk-footer__contact .rk-btn{margin-top:16px;}
.rk-footer__bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0 30px;font-size:13px;color:#8A8D86;
}
.rk-footer__bottom-links{display:flex;gap:20px;}
.rk-footer__bottom-links a{color:#8A8D86;}
.rk-footer__bottom-links a:hover{color:var(--cinnabar);}

/* ---------- 弹层 ---------- */
.rk-modal{
  position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;
  padding:24px;opacity:0;visibility:hidden;transition:opacity .4s var(--ease),visibility .4s var(--ease);
}
.rk-modal.is-open{opacity:1;visibility:visible;}
.rk-modal__mask{position:absolute;inset:0;background:rgba(22,24,26,.55);}
.rk-modal__panel{
  position:relative;background:#fff;border-radius:var(--r-card);width:100%;max-width:520px;
  padding:36px 34px;box-shadow:0 30px 80px rgba(0,0,0,.28);
  transform:translateY(16px);transition:transform .5s var(--ease);max-height:90vh;overflow-y:auto;
}
.rk-modal.is-open .rk-modal__panel{transform:translateY(0);}
.rk-modal__close{
  position:absolute;right:16px;top:16px;width:40px;height:40px;border:1px solid var(--line);
  background:transparent;border-radius:var(--r-btn);cursor:pointer;color:var(--text-2);font-size:14px;
}
.rk-modal__close:hover{border-color:var(--ink);color:var(--ink);}
.rk-modal__panel h3{font-size:22px;margin-bottom:8px;}
.rk-modal__panel > p{color:var(--text-2);font-size:14px;margin-bottom:24px;}

/* ---------- 回到顶部 ---------- */
.rk-top{
  position:fixed;right:22px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:var(--ink);color:#F7F5F1;border:0;cursor:pointer;z-index:70;
  display:flex;align-items:center;justify-content:center;font-size:14px;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .4s var(--ease),visibility .4s var(--ease),transform .4s var(--ease),background .35s var(--ease);
}
.rk-top.is-on{opacity:1;visibility:visible;transform:translateY(0);}
.rk-top:hover{background:var(--cinnabar);}

/* ---------- 入场动效 ---------- */
.rk-rise{opacity:0;transform:translateY(16px);transition:opacity .7s var(--ease),transform .7s var(--ease);}
.rk-rise.is-in{opacity:1;transform:translateY(0);}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none!important;transition-duration:.01ms!important;}
  .rk-rise{opacity:1;transform:none;}
}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1200px){
  .rk-header__inner{gap:20px;}
  .rk-nav{gap:20px;}
  .rk-logo strong{font-size:17px;}
}
@media screen and (max-width:1024px){
  .rk-nav{display:none;}
  .rk-burger{display:flex;}
  .rk-header__cta{display:none;}
  .rk-hero__grid{grid-template-columns:1fr;gap:40px;}
  .rk-hero__media img{aspect-ratio:16/10;}
  .rk-split{grid-template-columns:1fr;gap:32px;}
  .rk-split--rev .rk-split__media{order:0;}
  .rk-formband__grid{grid-template-columns:1fr;gap:40px;}
  .rk-compare{grid-template-columns:1fr;}
  .rk-footer__grid{grid-template-columns:1fr 1fr;gap:36px;}
}
@media screen and (max-width:900px){
  .rk-section{padding:72px 0;}
  .rk-hero{padding:32px 0 64px;}
  .rk-anchors__inner{gap:22px;}
  .rk-topbar__left span.rk-topbar__hide{display:none;}
}
@media screen and (max-width:640px){
  body{font-size:15.5px;}
  .grid-container.rk-container{padding-left:18px;padding-right:18px;}
  .rk-topbar__inner{justify-content:center;}
  .rk-topbar__right a{display:none;}
  .rk-header__inner{height:68px;}
  .rk-logo strong{font-size:15px;letter-spacing:0;}
  .rk-hero h1{font-size:30px;}
  .rk-hero__lead{font-size:16px;}
  .rk-hero__actions{gap:16px;}
  .rk-btn{width:100%;padding:0 20px;}
  .rk-hero__actions .rk-link{width:100%;}
  .rk-section{padding:56px 0;}
  .rk-section__head{margin-bottom:34px;}
  .rk-form__row{grid-template-columns:1fr;gap:0;}
  .rk-form{padding:26px 20px;}
  .rk-formband{padding:60px 0;}
  .rk-split{padding:36px 0;}
  .rk-split__num{font-size:34px;}
  .rk-faq__q{font-size:16px;padding:22px 38px 22px 0;}
  .rk-faq__a p{padding-right:20px;}
  .rk-footer{padding-top:52px;}
  .rk-footer__grid{grid-template-columns:1fr;gap:30px;}
  .rk-footer__bottom{justify-content:flex-start;}
  .rk-modal{padding:0;align-items:flex-end;}
  .rk-modal__panel{max-width:100%;border-radius:var(--r-card) var(--r-card) 0 0;padding:30px 20px 34px;max-height:92vh;}
  .rk-top{right:14px;bottom:16px;}
  .rk-badge{right:8px;bottom:12px;font-size:12px;padding:7px 14px;}
  .rk-hero__frame{display:none;}
}

/* roulang page: category3 */
:root{
  --ink:#16181A;
  --paper:#F7F5F1;
  --paper-2:#EFEBE4;
  --card:#FFFFFF;
  --cinnabar:#C1502E;
  --moss:#4A5A52;
  --t1:#1A1A18;
  --t2:#5C5F5A;
  --t3:#8A8D86;
  --line:#E2DED6;
  --line-2:#EAE6DF;
  --r-card:6px;
  --r-btn:2px;
  --r-img:4px;
  --sh-sm:0 1px 2px rgba(22,24,26,.04);
  --sh-lg:0 18px 40px rgba(22,24,26,.08);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --sec:clamp(56px,7vw,110px);
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;padding:0;
  font-family:var(--sans);
  font-size:16.5px;line-height:1.9;
  color:var(--t1);background:var(--paper);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-family:var(--serif);font-weight:800;letter-spacing:-.02em;line-height:1.28}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
::selection{background:rgba(193,80,46,.18)}
:focus-visible{outline:2px solid var(--cinnabar);outline-offset:2px}

/* 容器 */
.rk-container{width:100%;max-width:var(--wrap);margin:0 auto;padding-left:24px;padding-right:24px}
.grid-container.rk-container{max-width:var(--wrap);padding-left:24px;padding-right:24px}

/* 顶部信息条 + 头部 */
.rk-headwrap{position:sticky;top:0;z-index:80}
.rk-topbar{
  background:var(--ink);color:rgba(247,245,241,.82);
  font-size:12.5px;line-height:1.6;
  max-height:38px;overflow:hidden;
  transition:max-height .42s var(--ease),opacity .3s var(--ease);
}
.rk-headwrap.is-scrolled .rk-topbar{max-height:0;opacity:0}
.rk-topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:38px}
.rk-topbar__left{display:flex;align-items:center;gap:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rk-topbar__dot{width:6px;height:6px;background:var(--cinnabar);display:inline-block;border-radius:50%;flex:none}
.rk-topbar__right{display:flex;align-items:center;gap:20px;white-space:nowrap}
.rk-topbar__right a{color:rgba(247,245,241,.92);border-bottom:1px solid transparent;transition:border-color .3s var(--ease),color .3s var(--ease)}
.rk-topbar__right a:hover{color:#fff;border-color:var(--cinnabar)}

.rk-header{background:rgba(247,245,241,.96);backdrop-filter:saturate(160%) blur(8px);border-bottom:1px solid var(--line);transition:box-shadow .35s var(--ease),padding .35s var(--ease)}
.rk-header.is-scrolled{box-shadow:0 6px 22px rgba(22,24,26,.06)}
.rk-header__inner{display:flex;align-items:center;justify-content:space-between;gap:28px;min-height:80px;transition:min-height .35s var(--ease)}
.rk-header.is-scrolled .rk-header__inner{min-height:68px}
.rk-logo{display:flex;align-items:center;gap:12px;min-width:0}
.rk-logo__mark{width:22px;height:22px;background:var(--ink);flex:none;position:relative;border-radius:2px;transition:background .35s var(--ease)}
.rk-logo__mark::after{content:"";position:absolute;right:5px;bottom:5px;width:7px;height:7px;background:var(--cinnabar)}
.rk-logo:hover .rk-logo__mark{background:var(--cinnabar)}
.rk-logo__text{display:flex;flex-direction:column;min-width:0}
.rk-logo__text strong{font-family:var(--serif);font-size:18px;font-weight:900;letter-spacing:.01em;line-height:1.25;color:var(--ink);white-space:nowrap}
.rk-logo__text em{font-style:normal;font-size:11.5px;color:var(--t3);letter-spacing:.14em;line-height:1.4}
.rk-nav{display:flex;align-items:center;gap:32px}
.rk-nav a{position:relative;font-size:15px;color:var(--t2);padding:6px 0;transition:color .3s var(--ease);white-space:nowrap}
.rk-nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--cinnabar);transition:width .38s var(--ease)}
.rk-nav a:hover{color:var(--ink)}
.rk-nav a:hover::after,.rk-nav a.is-active::after{width:100%}
.rk-nav a.is-active{color:var(--ink);font-weight:700}
.rk-header__actions{display:flex;align-items:center;gap:14px}
.rk-burger{width:44px;height:44px;display:none;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:var(--r-btn);color:var(--ink);transition:background .3s var(--ease),color .3s var(--ease)}
.rk-burger:hover{background:var(--ink);color:var(--paper)}

/* 按钮 */
.rk-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:50px;padding:0 32px;
  background:var(--ink);color:var(--paper);
  border:1px solid var(--ink);border-radius:var(--r-btn);
  font-size:15px;font-weight:500;letter-spacing:.02em;
  transition:background .35s var(--ease),border-color .35s var(--ease),color .35s var(--ease),transform .35s var(--ease);
}
.rk-btn i{transition:transform .35s var(--ease)}
.rk-btn:hover{background:var(--cinnabar);border-color:var(--cinnabar);color:#fff}
.rk-btn:hover i{transform:translateX(4px)}
.rk-btn:active{transform:translateY(1px)}
.rk-btn--sm{min-height:44px;padding:0 22px;font-size:14px}
.rk-btn--ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.rk-btn--ghost:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.rk-btn--light{background:transparent;color:var(--paper);border-color:rgba(247,245,241,.42)}
.rk-btn--light:hover{background:var(--cinnabar);border-color:var(--cinnabar);color:#fff}
.rk-btn--full{width:100%}
.rk-btn[disabled]{opacity:.45;cursor:not-allowed;pointer-events:none}
.rk-link{position:relative;display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:500;color:var(--ink)}
.rk-link::after{content:"";position:absolute;left:0;bottom:-3px;width:0;height:1px;background:var(--cinnabar);transition:width .38s var(--ease)}
.rk-link:hover{color:var(--cinnabar)}
.rk-link:hover::after{width:100%}

/* 面包屑 */
.rk-crumb{padding:22px 0 0;font-size:12.5px;color:var(--t3)}
.rk-crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.rk-crumb li{display:flex;align-items:center;gap:10px}
.rk-crumb li+li::before{content:"/";color:var(--line);font-size:12px}
.rk-crumb a{color:var(--t2);transition:color .3s var(--ease)}
.rk-crumb a:hover{color:var(--cinnabar)}
.rk-crumb .is-current{color:var(--t3)}

/* 页面头部 */
.rk-pagehead{position:relative;padding:clamp(48px,6vw,84px) 0 clamp(40px,5vw,64px);border-bottom:1px solid var(--line)}
.rk-pagehead::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.16;filter:saturate(.6);
  pointer-events:none;
}
.rk-pagehead .rk-container{position:relative;z-index:1}
.rk-eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12.5px;letter-spacing:.2em;color:var(--cinnabar);text-transform:none;margin-bottom:20px}
.rk-eyebrow::before{content:"";width:26px;height:1px;background:var(--cinnabar)}
.rk-pagehead h1{font-size:clamp(30px,4.4vw,52px);max-width:900px;color:var(--ink)}
.rk-pagehead h1 span{position:relative;white-space:nowrap}
.rk-pagehead h1 span::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:8px;background:rgba(193,80,46,.16);z-index:-1}
.rk-pagehead__lead{margin-top:24px;max-width:760px;font-size:18px;color:var(--t2);line-height:1.95}
.rk-pagehead__meta{margin-top:30px;display:flex;flex-wrap:wrap;gap:10px}
.rk-tag{display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.7);font-size:13px;color:var(--t2)}
.rk-tag i{color:var(--moss);font-size:12px}

/* 板块通用 */
.rk-sec{padding:var(--sec) 0}
.rk-sec--alt{background:var(--paper-2)}
.rk-sec__head{max-width:720px;margin-bottom:clamp(32px,4vw,52px)}
.rk-sec__head h2{font-size:clamp(25px,3vw,38px);color:var(--ink);margin-bottom:18px}
.rk-sec__head p{color:var(--t2);font-size:16.5px}
.rk-sec__head--split{max-width:none;display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px}
.rk-sec__head--split>div{max-width:660px}

/* 步骤时间线 */
.rk-steps{margin-top:8px}
.rk-step{position:relative;display:grid;grid-template-columns:96px 1fr;gap:32px;padding-bottom:52px}
.rk-step:last-child{padding-bottom:0}
.rk-step::before{content:"";position:absolute;left:31px;top:66px;bottom:6px;width:1px;background:var(--line)}
.rk-step:last-child::before{display:none}
.rk-step__num{
  position:relative;z-index:1;
  width:64px;height:64px;display:flex;align-items:center;justify-content:center;
  font-family:var(--serif);font-weight:900;font-size:26px;color:var(--cinnabar);
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-card);
  transition:border-color .38s var(--ease),background .38s var(--ease),color .38s var(--ease);
}
.rk-sec--alt .rk-step__num{background:var(--paper-2)}
.rk-step:hover .rk-step__num{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.rk-step__body{padding-top:6px;max-width:760px}
.rk-step__body h3{font-size:21px;color:var(--ink);margin-bottom:14px}
.rk-step__body p{color:var(--t2);font-size:16px}
.rk-step__tags{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px}
.rk-step__tags span{font-size:12.5px;color:var(--moss);border:1px solid var(--line);border-radius:999px;padding:4px 12px;background:var(--card)}

/* 团队图文 */
.rk-team{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,64px);align-items:center}
.rk-team__media{position:relative;border:1px solid var(--line);border-radius:var(--r-card);padding:14px;background:var(--card);box-shadow:var(--sh-sm);transition:box-shadow .45s var(--ease),transform .45s var(--ease)}
.rk-team__media:hover{box-shadow:var(--sh-lg);transform:translateY(-4px)}
.rk-team__media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.rk-team__badge{position:absolute;right:28px;bottom:28px;background:var(--paper);border:1px solid var(--line);border-radius:999px;padding:8px 18px;font-size:12.5px;color:var(--t2);letter-spacing:.04em}
.rk-team__body h2{font-size:clamp(24px,2.8vw,36px);color:var(--ink);margin-bottom:20px}
.rk-team__body>p{color:var(--t2);margin-bottom:26px}
.rk-list li{display:flex;gap:14px;padding:16px 0;border-top:1px solid var(--line-2)}
.rk-list li:last-child{border-bottom:1px solid var(--line-2)}
.rk-list i{color:var(--cinnabar);font-size:13px;margin-top:9px;flex:none}
.rk-list strong{display:block;font-size:15.5px;color:var(--ink);font-weight:700;margin-bottom:4px;font-family:var(--sans)}
.rk-list span{font-size:14.5px;color:var(--t2);line-height:1.8}

/* 深色数据区 */
.rk-stats{background:var(--ink);color:var(--paper);padding:clamp(52px,6vw,88px) 0}
.rk-stats h2{font-size:clamp(23px,2.6vw,34px);color:var(--paper);margin-bottom:16px;max-width:640px}
.rk-stats__intro{color:rgba(247,245,241,.68);max-width:640px;margin-bottom:48px}
.rk-stats__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;border-top:1px solid rgba(247,245,241,.16);padding-top:40px}
.rk-stat__num{display:block;font-family:var(--serif);font-weight:900;font-size:clamp(38px,4.6vw,60px);line-height:1;color:var(--paper);font-variant-numeric:tabular-nums}
.rk-stat__num small{font-size:.42em;font-weight:700;margin-left:6px;color:var(--cinnabar);font-family:var(--sans)}
.rk-stat__label{margin-top:14px;font-size:14px;color:rgba(247,245,241,.66);line-height:1.75}
.rk-stats__foot{margin-top:44px;padding-top:22px;border-top:1px solid rgba(247,245,241,.16);display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;font-size:13.5px;color:rgba(247,245,241,.6)}
.rk-stats__foot a{color:var(--paper);border-bottom:1px solid rgba(247,245,241,.4);padding-bottom:2px;transition:color .3s var(--ease),border-color .3s var(--ease)}
.rk-stats__foot a:hover{color:var(--cinnabar);border-color:var(--cinnabar)}

/* FAQ */
.rk-faq{border-top:1px solid var(--line);margin-top:8px}
.rk-faq__item{border-bottom:1px solid var(--line)}
.rk-faq__q{
  width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:24px;
  padding:26px 0;text-align:left;font-size:17.5px;font-weight:700;color:var(--ink);
  font-family:var(--serif);letter-spacing:-.01em;transition:color .3s var(--ease);
}
.rk-faq__q:hover{color:var(--cinnabar)}
.rk-faq__sign{flex:none;width:26px;height:26px;position:relative;margin-top:4px}
.rk-faq__sign::before,.rk-faq__sign::after{content:"";position:absolute;background:var(--cinnabar);transition:transform .4s var(--ease),opacity .3s var(--ease)}
.rk-faq__sign::before{left:0;top:12px;width:26px;height:2px}
.rk-faq__sign::after{left:12px;top:0;width:2px;height:26px}
.rk-faq__item.is-open .rk-faq__sign::after{transform:rotate(90deg);opacity:0}
.rk-faq__a{max-height:0;overflow:hidden;transition:max-height .5s var(--ease)}
.rk-faq__a p{padding:0 56px 28px 0;color:var(--t2);font-size:15.5px}

/* CTA 表单带 */
.rk-cta{background:var(--paper-2);padding:var(--sec) 0;border-top:1px solid var(--line)}
.rk-cta__grid{display:grid;grid-template-columns:5fr 7fr;gap:clamp(32px,5vw,64px);align-items:start}
.rk-cta__info h2{font-size:clamp(25px,3vw,38px);color:var(--ink);margin-bottom:20px}
.rk-cta__info p{color:var(--t2)}
.rk-cta__points{margin-top:28px}
.rk-cta__points li{display:flex;gap:12px;align-items:flex-start;padding:10px 0;color:var(--t2);font-size:15px}
.rk-cta__points i{color:var(--cinnabar);font-size:13px;margin-top:8px;flex:none}
.rk-form{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:clamp(24px,3vw,40px);box-shadow:var(--sh-sm)}
.rk-field{margin-bottom:20px}
.rk-field label{display:block;font-size:13.5px;color:var(--t2);margin-bottom:8px;letter-spacing:.02em}
.rk-field input,.rk-field textarea,.rk-field select{
  width:100%;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-btn);
  padding:13px 15px;font-size:15px;color:var(--t1);line-height:1.6;
  transition:border-color .3s var(--ease),background .3s var(--ease),box-shadow .3s var(--ease);
}
.rk-field textarea{resize:vertical;min-height:104px}
.rk-field input:hover,.rk-field textarea:hover,.rk-field select:hover{border-color:#D2CCC1}
.rk-field input:focus,.rk-field textarea:focus,.rk-field select:focus{outline:none;border-color:var(--ink);background:#fff}
.rk-field.is-error input,.rk-field.is-error textarea{border-color:var(--cinnabar)}
.rk-field__err{display:none;margin-top:6px;font-size:13px;color:var(--cinnabar)}
.rk-field.is-error .rk-field__err{display:block}
.rk-chips{display:flex;flex-wrap:wrap;gap:10px}
.rk-chips label{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border:1px solid var(--line);border-radius:999px;
  font-size:13.5px;color:var(--t2);cursor:pointer;background:var(--paper);
  transition:border-color .3s var(--ease),color .3s var(--ease),background .3s var(--ease);
}
.rk-chips input{position:absolute;opacity:0;width:0;height:0}
.rk-chips label:hover{border-color:var(--ink);color:var(--ink)}
.rk-chips input:checked+span{color:var(--ink);font-weight:700}
.rk-chips label:has(input:checked){border-color:var(--cinnabar);color:var(--ink);background:rgba(193,80,46,.06)}
.rk-privacy{display:flex;gap:12px;align-items:flex-start;margin:22px 0 24px;font-size:13px;color:var(--t3);line-height:1.8}
.rk-privacy input{
  appearance:none;-webkit-appearance:none;flex:none;width:16px;height:16px;margin-top:5px;
  border:1px solid var(--line);border-radius:2px;background:#fff;position:relative;
  transition:border-color .3s var(--ease),background .3s var(--ease);cursor:pointer;
}
.rk-privacy input:checked{border-color:var(--cinnabar);background:var(--cinnabar)}
.rk-privacy input:checked::after{content:"";position:absolute;left:4px;top:1px;width:5px;height:9px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}
.rk-privacy a{color:var(--t2);border-bottom:1px solid var(--line);transition:color .3s var(--ease),border-color .3s var(--ease)}
.rk-privacy a:hover{color:var(--cinnabar);border-color:var(--cinnabar)}
.rk-form__ok{display:none;text-align:center;padding:40px 10px}
.rk-form__ok i{font-size:38px;color:var(--cinnabar);display:block;margin-bottom:18px}
.rk-form__ok strong{display:block;font-family:var(--serif);font-size:22px;margin-bottom:10px;color:var(--ink)}
.rk-form__ok p{color:var(--t2);font-size:15px}
.rk-form.is-done form{display:none}
.rk-form.is-done .rk-form__ok{display:block}

/* 隐私说明条 */
.rk-note{background:var(--paper);padding:26px 0;border-top:1px solid var(--line);font-size:13px;color:var(--t3)}
.rk-note__inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px}
.rk-note a{color:var(--t2);border-bottom:1px solid var(--line);transition:color .3s var(--ease),border-color .3s var(--ease)}
.rk-note a:hover{color:var(--cinnabar);border-color:var(--cinnabar)}

/* 页脚 */
.rk-footer{background:var(--ink);color:rgba(247,245,241,.72);padding:clamp(48px,6vw,80px) 0 0;font-size:13.5px}
.rk-footer__grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:52px;border-bottom:1px solid rgba(247,245,241,.14)}
.rk-footer h4{font-family:var(--sans);font-size:13px;font-weight:700;letter-spacing:.16em;color:rgba(247,245,241,.52);margin-bottom:20px}
.rk-footer__logo{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.rk-footer__logo strong{font-family:var(--serif);font-size:17px;font-weight:900;color:var(--paper);letter-spacing:.01em}
.rk-footer .rk-logo__mark{background:var(--paper)}
.rk-footer .rk-logo__mark::after{background:var(--cinnabar)}
.rk-footer__slogan{font-family:var(--serif);font-size:15px;color:var(--paper);margin-bottom:14px;letter-spacing:.02em}
.rk-footer__desc{line-height:1.9;max-width:340px;color:rgba(247,245,241,.6)}
.rk-footer__links{display:flex;flex-direction:column;gap:12px}
.rk-footer__links a{color:rgba(247,245,241,.72);width:fit-content;transition:color .3s var(--ease),transform .3s var(--ease)}
.rk-footer__links a:hover{color:var(--cinnabar);transform:translateX(3px)}
.rk-footer__contact strong{display:block;font-family:var(--serif);font-size:22px;color:var(--paper);margin-bottom:10px;letter-spacing:.02em}
.rk-footer__contact p{margin-bottom:8px;color:rgba(247,245,241,.6)}
.rk-footer__contact .rk-btn{margin-top:18px}
.rk-footer__bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;padding:24px 0;font-size:12.5px;color:rgba(247,245,241,.5)}
.rk-footer__bottom-links{display:flex;flex-wrap:wrap;gap:22px}
.rk-footer__bottom-links a{transition:color .3s var(--ease)}
.rk-footer__bottom-links a:hover{color:var(--cinnabar)}

/* 抽屉与遮罩 */
.rk-drawer{position:fixed;inset:0;z-index:120;pointer-events:none}
.rk-drawer__panel{
  position:absolute;top:0;right:0;height:100%;width:min(84vw,340px);
  background:var(--paper);border-left:1px solid var(--line);
  padding:26px 24px 40px;display:flex;flex-direction:column;gap:26px;
  transform:translateX(100%);transition:transform .48s var(--ease);
  overflow-y:auto;
}
.rk-drawer.is-open{pointer-events:auto}
.rk-drawer.is-open .rk-drawer__panel{transform:translateX(0)}
.rk-drawer__top{display:flex;align-items:center;justify-content:space-between}
.rk-drawer__top strong{font-family:var(--serif);font-size:16px;font-weight:900;color:var(--ink)}
.rk-drawer__close{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:var(--r-btn);color:var(--ink);transition:background .3s var(--ease),color .3s var(--ease)}
.rk-drawer__close:hover{background:var(--ink);color:var(--paper)}
.rk-drawer__nav{display:flex;flex-direction:column}
.rk-drawer__nav a{padding:16px 0;border-bottom:1px solid var(--line-2);font-size:16px;color:var(--t2);opacity:0;transform:translateY(8px);transition:opacity .4s var(--ease),transform .4s var(--ease),color .3s var(--ease)}
.rk-drawer.is-open .rk-drawer__nav a{opacity:1;transform:translateY(0)}
.rk-drawer.is-open .rk-drawer__nav a:nth-child(1){transition-delay:.08s}
.rk-drawer.is-open .rk-drawer__nav a:nth-child(2){transition-delay:.14s}
.rk-drawer.is-open .rk-drawer__nav a:nth-child(3){transition-delay:.2s}
.rk-drawer.is-open .rk-drawer__nav a:nth-child(4){transition-delay:.26s}
.rk-drawer__nav a.is-active{color:var(--ink);font-weight:700}
.rk-drawer__nav a:hover{color:var(--cinnabar)}
.rk-mask{position:fixed;inset:0;background:rgba(22,24,26,.5);opacity:0;visibility:hidden;transition:opacity .4s var(--ease),visibility .4s var(--ease);z-index:110}
.rk-mask.is-open{opacity:1;visibility:visible}

/* 弹层 */
.rk-modal{position:fixed;inset:0;z-index:140;display:flex;align-items:center;justify-content:center;padding:24px;opacity:0;visibility:hidden;transition:opacity .4s var(--ease),visibility .4s var(--ease)}
.rk-modal.is-open{opacity:1;visibility:visible}
.rk-modal__panel{position:relative;width:100%;max-width:520px;background:#fff;border-radius:var(--r-card);padding:clamp(26px,3.4vw,40px);max-height:90vh;overflow-y:auto;transform:translateY(14px);transition:transform .45s var(--ease)}
.rk-modal.is-open .rk-modal__panel{transform:translateY(0)}
.rk-modal__close{position:absolute;top:16px;right:16px;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:var(--r-btn);color:var(--t2);transition:background .3s var(--ease),color .3s var(--ease)}
.rk-modal__close:hover{background:var(--ink);color:var(--paper)}
.rk-modal__head{margin-bottom:26px;padding-right:40px}
.rk-modal__head h3{font-size:24px;color:var(--ink);margin-bottom:10px}
.rk-modal__head p{font-size:14.5px;color:var(--t2)}

/* 回到顶部 */
.rk-backtop{position:fixed;right:24px;bottom:28px;width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:var(--ink);color:var(--paper);border-radius:50%;z-index:100;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .4s var(--ease),visibility .4s var(--ease),transform .4s var(--ease),background .3s var(--ease)}
.rk-backtop.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.rk-backtop:hover{background:var(--cinnabar)}

/* 入场动效 */
.rk-reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.rk-reveal.is-in{opacity:1;transform:none}

/* 响应式 */
@media (max-width:1200px){
  .rk-nav{gap:24px}
  .rk-nav a{font-size:14.5px}
}
@media (max-width:1024px){
  .rk-nav{display:none}
  .rk-burger{display:flex}
  .rk-header__actions .rk-btn{display:none}
  .rk-stats__grid{grid-template-columns:repeat(2,1fr);gap:36px 28px}
}
@media (max-width:900px){
  .rk-team{grid-template-columns:1fr}
  .rk-cta__grid{grid-template-columns:1fr}
  .rk-footer__grid{grid-template-columns:1fr 1fr;gap:34px}
  .rk-footer__desc{max-width:none}
}
@media (max-width:640px){
  body{font-size:15.5px}
  .rk-container{padding-left:18px;padding-right:18px}
  .grid-container.rk-container{padding-left:18px;padding-right:18px}
  .rk-topbar__right a,.rk-topbar__left span.rk-topbar__note{display:none}
  .rk-logo__text strong{font-size:15.5px;white-space:normal}
  .rk-logo__text em{display:none}
  .rk-pagehead__lead{font-size:16.5px}
  .rk-step{grid-template-columns:1fr;gap:18px;padding-bottom:40px}
  .rk-step::before{left:19px;top:62px}
  .rk-step__num{width:40px;height:40px;font-size:19px;border-radius:4px}
  .rk-faq__q{font-size:16px;padding:22px 0}
  .rk-faq__a p{padding-right:0}
  .rk-stats__grid{grid-template-columns:1fr;gap:30px}
  .rk-footer__grid{grid-template-columns:1fr}
  .rk-form{padding:22px}
  .rk-modal{padding:0;align-items:flex-end}
  .rk-modal__panel{max-width:none;border-radius:6px 6px 0 0;max-height:92vh}
  .rk-backtop{right:16px;bottom:18px}
}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
  .rk-reveal{opacity:1;transform:none}
}

/* roulang page: category2 */
:root{
  --ink:#16181A;
  --ink-2:#24272A;
  --paper:#F7F5F1;
  --paper-2:#EFEBE4;
  --card:#FFFFFF;
  --cinnabar:#C1502E;
  --cinnabar-dark:#A63F22;
  --pine:#4A5A52;
  --text:#1A1A18;
  --text-2:#5C5F5A;
  --text-3:#8A8D86;
  --border:#E2DED6;
  --line:#EAE6DF;
  --r-card:6px;
  --r-btn:2px;
  --r-img:4px;
  --sh-1:0 1px 2px rgba(22,24,26,.04);
  --sh-2:0 18px 40px rgba(22,24,26,.08);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Noto Serif SC","Songti SC","SimSun",serif;
  --sans:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
  --nav-h:84px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.9;
  font-weight:400;
  letter-spacing:.008em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;background:transparent;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;line-height:inherit;margin:0;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;letter-spacing:-.02em;line-height:1.24;}
:focus-visible{outline:2px solid var(--cinnabar);outline-offset:2px;}
::selection{background:rgba(193,80,46,.16);}

/* 容器 */
.grid-container.rk-container{max-width:1200px;padding-left:24px;padding-right:24px;}
@media screen and (min-width:40em){
  .grid-container.rk-container{max-width:1200px;padding-left:24px;padding-right:24px;}
}
.rk-narrow{max-width:760px;}

/* 顶部信息条 */
.rk-topbar{
  background:var(--ink);
  color:rgba(247,245,241,.82);
  font-size:12.5px;
  letter-spacing:.04em;
  height:38px;
  display:flex;
  align-items:center;
  overflow:hidden;
  transition:height .42s var(--ease),transform .42s var(--ease),opacity .42s var(--ease);
}
.rk-topbar.is-hidden{height:0;transform:translateY(-100%);opacity:0;}
.rk-topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;}
.rk-topbar__left{display:flex;align-items:center;gap:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.rk-topbar__dot{width:6px;height:6px;background:var(--cinnabar);display:inline-block;border-radius:999px;flex:none;}
.rk-topbar__right{display:flex;align-items:center;gap:18px;white-space:nowrap;}
.rk-topbar__right a{color:rgba(247,245,241,.82);transition:color .3s var(--ease);}
.rk-topbar__right a:hover{color:#fff;}
.rk-topbar__cta{position:relative;}
.rk-topbar__cta::after{content:"";position:absolute;left:0;bottom:-3px;width:100%;height:1px;background:var(--cinnabar);transform:scaleX(0);transform-origin:left;transition:transform .42s var(--ease);}
.rk-topbar__cta:hover::after{transform:scaleX(1);}

/* 导航 */
.rk-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(247,245,241,.96);
  backdrop-filter:saturate(150%) blur(6px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .4s var(--ease),height .4s var(--ease);
}
.rk-header.is-scrolled{box-shadow:0 6px 24px rgba(22,24,26,.06);}
.rk-header__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:var(--nav-h);
  transition:height .4s var(--ease);
}
.rk-header.is-scrolled .rk-header__inner{height:70px;}
.rk-logo{display:flex;align-items:center;gap:11px;flex:none;}
.rk-logo__mark{
  width:26px;height:26px;flex:none;display:block;position:relative;
  background:var(--ink);
}
.rk-logo__mark::after{
  content:"";position:absolute;right:-5px;bottom:-5px;width:11px;height:11px;
  background:var(--cinnabar);
}
.rk-logo__text{display:flex;flex-direction:column;line-height:1.18;}
.rk-logo__text strong{
  font-family:var(--serif);font-size:18px;font-weight:900;letter-spacing:-.01em;color:var(--ink);
}
.rk-logo__text em{
  font-style:normal;font-size:10.5px;letter-spacing:.22em;color:var(--text-3);
}
.rk-nav{display:flex;align-items:center;gap:30px;}
.rk-nav a{
  position:relative;
  font-size:15px;
  color:var(--text-2);
  padding:6px 0;
  transition:color .3s var(--ease);
}
.rk-nav a::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;
  background:var(--cinnabar);transform:scaleX(0);transform-origin:left;
  transition:transform .42s var(--ease);
}
.rk-nav a:hover{color:var(--ink);}
.rk-nav a:hover::after{transform:scaleX(1);}
.rk-nav a.is-active{color:var(--ink);font-weight:500;}
.rk-nav a.is-active::after{transform:scaleX(1);}
.rk-header__actions{display:flex;align-items:center;gap:14px;flex:none;}
.rk-burger{
  display:none;width:46px;height:46px;align-items:center;justify-content:center;
  border:1px solid var(--border);border-radius:var(--r-btn);background:var(--card);
}
.rk-burger span{display:block;width:18px;height:1.5px;background:var(--ink);position:relative;}
.rk-burger span::before,.rk-burger span::after{
  content:"";position:absolute;left:0;width:18px;height:1.5px;background:var(--ink);transition:transform .35s var(--ease);
}
.rk-burger span::before{top:-6px;}
.rk-burger span::after{top:6px;}

/* 按钮 */
.rk-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:50px;padding:0 30px;border-radius:var(--r-btn);
  background:var(--ink);color:var(--paper);
  font-size:15px;font-weight:500;letter-spacing:.03em;
  border:1px solid var(--ink);
  transition:background-color .38s var(--ease),color .38s var(--ease),border-color .38s var(--ease),opacity .3s var(--ease);
}
.rk-btn .rk-btn__arrow{transition:transform .38s var(--ease);display:inline-block;}
.rk-btn:hover{background:var(--cinnabar);border-color:var(--cinnabar);color:#fff;}
.rk-btn:hover .rk-btn__arrow{transform:translateX(4px);}
.rk-btn:active{background:var(--cinnabar-dark);border-color:var(--cinnabar-dark);transform:translateY(1px);}
.rk-btn:disabled,.rk-btn.is-disabled{background:#C9C6C0;border-color:#C9C6C0;color:#fff;cursor:not-allowed;}
.rk-btn--ghost{background:transparent;color:var(--ink);border:1px solid var(--ink);}
.rk-btn--ghost:hover{background:var(--ink);color:var(--paper);border-color:var(--ink);}
.rk-btn--light{background:var(--paper);color:var(--ink);border-color:var(--paper);}
.rk-btn--light:hover{background:var(--cinnabar);border-color:var(--cinnabar);color:#fff;}
.rk-btn--sm{height:42px;padding:0 22px;font-size:14px;}
.rk-btn--block{width:100%;}
.rk-link{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  font-size:15px;color:var(--ink);padding-bottom:2px;
}
.rk-link::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;background:var(--cinnabar);
  transform:scaleX(0);transform-origin:left;transition:transform .42s var(--ease);
}
.rk-link:hover::after{transform:scaleX(1);}
.rk-link:hover .rk-btn__arrow{transform:translateX(4px);}
.rk-link .rk-btn__arrow{transition:transform .38s var(--ease);}

/* 面包屑 */
.rk-crumb{font-size:12.5px;color:var(--text-3);letter-spacing:.02em;padding:22px 0 0;display:flex;gap:8px;flex-wrap:wrap;align-items:center;}
.rk-crumb a{color:var(--text-2);transition:color .3s var(--ease);}
.rk-crumb a:hover{color:var(--cinnabar);}
.rk-crumb span.sep{color:#C6C2BA;}
.rk-crumb .cur{color:var(--text-3);}

/* 页头 */
.rk-pagehead{position:relative;padding:34px 0 76px;overflow:hidden;background:linear-gradient(180deg,var(--paper) 0%,var(--paper-2) 100%);}
.rk-pagehead__deco{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center right;
  opacity:.08;pointer-events:none;
}
.rk-pagehead__deco::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,var(--paper) 12%,rgba(247,245,241,.55) 60%,rgba(247,245,241,.2) 100%);
}
.rk-pagehead__grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;padding-top:30px;}
.rk-eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12px;letter-spacing:.2em;color:var(--pine);text-transform:uppercase;
  margin-bottom:20px;
}
.rk-eyebrow::before{content:"";width:26px;height:1px;background:var(--cinnabar);display:block;}
.rk-pagehead h1{
  font-size:clamp(32px,4.4vw,54px);
  font-weight:900;
  color:var(--ink);
  line-height:1.2;
}
.rk-pagehead h1 .rk-hl{position:relative;display:inline-block;}
.rk-pagehead h1 .rk-hl::after{
  content:"";position:absolute;left:0;right:0;bottom:.06em;height:.14em;
  background:rgba(193,80,46,.24);
}
.rk-lede{
  margin-top:22px;font-size:18px;line-height:1.92;color:var(--text-2);max-width:600px;
}
.rk-pagehead__cta{display:flex;align-items:center;gap:26px;flex-wrap:wrap;margin-top:34px;}
.rk-pagehead__note{margin-top:20px;font-size:13px;color:var(--text-3);letter-spacing:.02em;}
.rk-pagehead__media{position:relative;}
.rk-pagehead__media img{
  width:100%;height:360px;object-fit:cover;border-radius:var(--r-img);
  border:1px solid var(--border);box-shadow:var(--sh-1);
}
.rk-pagehead__media::after{
  content:"";position:absolute;right:-14px;bottom:-14px;width:120px;height:120px;
  border-right:1px solid var(--cinnabar);border-bottom:1px solid var(--cinnabar);
}
.rk-badge{
  position:absolute;left:-14px;bottom:24px;background:var(--card);border:1px solid var(--border);
  border-radius:999px;padding:9px 18px;font-size:12.5px;color:var(--text-2);letter-spacing:.04em;
  box-shadow:var(--sh-1);
}
.rk-badge strong{color:var(--cinnabar);font-family:var(--serif);font-size:15px;margin-right:5px;}

/* 筛选徽章行 */
.rk-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:44px;position:relative;}
.rk-chip{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border:1px solid var(--border);border-radius:999px;background:rgba(255,255,255,.7);
  font-size:13px;color:var(--text-2);letter-spacing:.03em;transition:all .35s var(--ease);
}
.rk-chip:hover{border-color:var(--cinnabar);color:var(--cinnabar);background:#fff;}

/* 板块 */
.rk-section{padding:96px 0;}
.rk-section--tight{padding:72px 0;}
.rk-section--alt{background:var(--paper-2);}
.rk-section--plain{background:var(--card);}
.rk-sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:44px;flex-wrap:wrap;}
.rk-sec-head h2{font-size:clamp(25px,2.8vw,38px);font-weight:900;color:var(--ink);max-width:640px;}
.rk-sec-head p{margin-top:14px;color:var(--text-2);font-size:16px;max-width:620px;}
.rk-sec-head__aside{font-size:13px;color:var(--text-3);letter-spacing:.04em;}

/* 案例网格 */
.rk-cases{display:grid;grid-template-columns:repeat(2,1fr);gap:34px;}
.rk-case{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .45s var(--ease),box-shadow .45s var(--ease),border-color .45s var(--ease);
}
.rk-case:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(193,80,46,.5);}
.rk-case__media{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--paper-2);}
.rk-case__media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease);}
.rk-case:hover .rk-case__media img{transform:scale(1.03);}
.rk-case__media::after{content:"";position:absolute;inset:0;background:rgba(22,24,26,.05);}
.rk-case__tag{
  position:absolute;top:16px;left:16px;z-index:2;
  background:rgba(247,245,241,.94);border:1px solid var(--border);border-radius:999px;
  padding:5px 14px;font-size:12px;color:var(--pine);letter-spacing:.04em;
}
.rk-case__body{padding:26px 28px 28px;display:flex;flex-direction:column;flex:1;}
.rk-case__body h3{font-size:21px;color:var(--ink);line-height:1.4;}
.rk-case__desc{margin-top:14px;font-size:15px;line-height:1.9;color:var(--text-2);}
.rk-case__metrics{
  margin-top:auto;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 26px;font-size:13px;color:var(--text-3);
}
.rk-case__metrics span{display:inline-flex;align-items:baseline;gap:6px;}
.rk-case__metrics strong{font-family:var(--serif);font-size:16px;color:var(--cinnabar);font-weight:700;}

/* 深色数据条 */
.rk-darkband{
  background:var(--ink);color:var(--paper);padding:72px 0;
}
.rk-darkband__head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;flex-wrap:wrap;margin-bottom:46px;}
.rk-darkband__head h2{color:var(--paper);font-size:clamp(24px,2.6vw,34px);}
.rk-darkband__head p{color:rgba(247,245,241,.62);font-size:15px;margin-top:12px;max-width:560px;}
.rk-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;}
.rk-metric{border-left:1px solid rgba(247,245,241,.16);padding-left:22px;}
.rk-metric__num{
  font-family:var(--serif);font-weight:900;font-size:clamp(38px,4.4vw,60px);
  line-height:1;color:var(--paper);font-variant-numeric:tabular-nums;
}
.rk-metric__num em{font-style:normal;font-size:.44em;color:var(--cinnabar);margin-left:4px;font-family:var(--sans);font-weight:500;}
.rk-metric__label{margin-top:14px;font-size:14px;color:rgba(247,245,241,.66);line-height:1.7;}
.rk-darkband__foot{
  margin-top:50px;padding-top:24px;border-top:1px solid rgba(247,245,241,.14);
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:13px;color:rgba(247,245,241,.55);
}
.rk-darkband__foot a{color:var(--paper);position:relative;}
.rk-darkband__foot a::after{content:"";position:absolute;left:0;bottom:-2px;width:100%;height:1px;background:var(--cinnabar);transform:scaleX(0);transform-origin:left;transition:transform .42s var(--ease);}
.rk-darkband__foot a:hover::after{transform:scaleX(1);}

/* 交付范围图文 */
.rk-split{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center;}
.rk-split--reverse{grid-template-columns:7fr 5fr;}
.rk-split__media img{width:100%;height:420px;object-fit:cover;border-radius:var(--r-img);border:1px solid var(--border);}
.rk-split__body h2{font-size:clamp(25px,2.8vw,36px);font-weight:900;color:var(--ink);}
.rk-split__body > p{margin-top:16px;color:var(--text-2);font-size:16px;}
.rk-scope-list{margin-top:30px;display:grid;gap:2px;}
.rk-scope-list li{
  display:grid;grid-template-columns:52px 1fr;gap:16px;align-items:start;
  padding:18px 0;border-top:1px solid var(--line);
  transition:background-color .35s var(--ease);
}
.rk-scope-list li:last-child{border-bottom:1px solid var(--line);}
.rk-scope-list .num{font-family:var(--serif);font-size:19px;color:var(--cinnabar);font-weight:700;letter-spacing:-.02em;}
.rk-scope-list h3{font-size:17px;color:var(--ink);}
.rk-scope-list p{margin-top:6px;font-size:14.5px;color:var(--text-2);line-height:1.8;}

/* 引述 / 信任 */
.rk-quotes{display:grid;grid-template-columns:repeat(2,1fr);gap:30px;}
.rk-quote{
  background:var(--card);border:1px solid var(--border);border-left:2px solid var(--cinnabar);
  border-radius:var(--r-card);padding:30px 30px 26px;
  transition:transform .45s var(--ease),box-shadow .45s var(--ease);
}
.rk-quote:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.rk-quote--wide{grid-column:1 / -1;}
.rk-quote p{font-size:16px;color:var(--text);line-height:1.9;}
.rk-quote footer{margin-top:18px;font-size:13px;color:var(--text-3);letter-spacing:.03em;}

/* FAQ */
.rk-faq{border-top:1px solid var(--line);}
.rk-faq__item{border-bottom:1px solid var(--line);}
.rk-faq__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:26px 0;text-align:left;font-size:17.5px;font-weight:500;color:var(--ink);
  font-family:var(--sans);transition:color .3s var(--ease);
}
.rk-faq__q:hover{color:var(--cinnabar);}
.rk-faq__icon{position:relative;width:16px;height:16px;flex:none;}
.rk-faq__icon::before,.rk-faq__icon::after{
  content:"";position:absolute;background:var(--cinnabar);transition:transform .42s var(--ease),opacity .3s var(--ease);
}
.rk-faq__icon::before{left:0;top:7.25px;width:16px;height:1.5px;}
.rk-faq__icon::after{top:0;left:7.25px;width:1.5px;height:16px;}
.rk-faq__item.is-open .rk-faq__icon::after{transform:rotate(90deg);opacity:0;}
.rk-faq__a{max-height:0;overflow:hidden;transition:max-height .5s var(--ease);}
.rk-faq__a-inner{padding:0 46px 28px 0;}
.rk-faq__a p{font-size:15px;color:var(--text-2);line-height:1.9;}

/* CTA 表单带 */
.rk-cta{background:var(--ink);color:var(--paper);padding:96px 0;}
.rk-cta__grid{display:grid;grid-template-columns:5fr 7fr;gap:60px;align-items:start;}
.rk-cta h2{color:var(--paper);font-size:clamp(26px,3vw,38px);font-weight:900;}
.rk-cta__copy p{margin-top:18px;color:rgba(247,245,241,.66);font-size:15.5px;}
.rk-cta__list{margin-top:30px;display:grid;gap:12px;font-size:14.5px;color:rgba(247,245,241,.72);}
.rk-cta__list li{display:flex;gap:12px;align-items:flex-start;}
.rk-cta__list li::before{content:"";width:6px;height:6px;background:var(--cinnabar);flex:none;margin-top:12px;border-radius:999px;}
.rk-form{
  background:rgba(247,245,241,.045);
  border:1px solid rgba(247,245,241,.16);
  border-radius:var(--r-card);
  padding:32px;
}
.rk-form__row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.rk-field{margin-bottom:18px;}
.rk-field label{display:block;font-size:13px;color:rgba(247,245,241,.7);margin-bottom:8px;letter-spacing:.04em;}
.rk-input,.rk-select,.rk-textarea{
  width:100%;background:rgba(247,245,241,.06);
  border:1px solid rgba(247,245,241,.2);border-radius:var(--r-btn);
  color:var(--paper);padding:12px 14px;font-size:15px;
  transition:border-color .3s var(--ease),background-color .3s var(--ease);
}
.rk-textarea{min-height:104px;resize:vertical;}
.rk-select option{color:var(--ink);}
.rk-input:hover,.rk-select:hover,.rk-textarea:hover{border-color:rgba(247,245,241,.38);}
.rk-input:focus,.rk-select:focus,.rk-textarea:focus{
  outline:none;border-color:var(--cinnabar);background:rgba(247,245,241,.1);
}
.rk-input.is-error,.rk-select.is-error{border-color:var(--cinnabar);}
.rk-error{display:none;font-size:13px;color:#E08A6E;margin-top:6px;}
.rk-error.is-on{display:block;}
.rk-check{display:flex;align-items:flex-start;gap:11px;font-size:13px;color:rgba(247,245,241,.66);line-height:1.75;}
.rk-check input{appearance:none;width:16px;height:16px;flex:none;margin-top:5px;border:1px solid rgba(247,245,241,.4);border-radius:2px;background:transparent;position:relative;cursor:pointer;transition:border-color .3s var(--ease);}
.rk-check input:checked{border-color:var(--cinnabar);}
.rk-check input:checked::after{content:"";position:absolute;left:5px;top:1px;width:4px;height:9px;border-right:1.6px solid var(--cinnabar);border-bottom:1.6px solid var(--cinnabar);transform:rotate(42deg);}
.rk-check a{color:var(--paper);text-decoration:underline;text-decoration-color:var(--cinnabar);text-underline-offset:3px;}
.rk-form__submit{margin-top:24px;}
.rk-form__ok{display:none;text-align:center;padding:38px 10px;}
.rk-form__ok.is-on{display:block;}
.rk-form__ok .ok-mark{
  width:52px;height:52px;border-radius:999px;border:1.5px solid var(--cinnabar);
  display:flex;align-items:center;justify-content:center;margin:0 auto 20px;position:relative;
}
.rk-form__ok .ok-mark::after{content:"";width:8px;height:15px;border-right:2px solid var(--cinnabar);border-bottom:2px solid var(--cinnabar);transform:rotate(42deg) translate(-1px,-2px);}
.rk-form__ok h3{color:var(--paper);font-size:21px;}
.rk-form__ok p{margin-top:12px;color:rgba(247,245,241,.66);font-size:14.5px;}

/* 隐私说明条 */
.rk-privacy{
  background:var(--paper-2);border-top:1px solid var(--border);
  padding:22px 0;font-size:13px;color:var(--text-3);
}
.rk-privacy__inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;}
.rk-privacy a{color:var(--text-2);text-decoration:underline;text-decoration-color:#CFCAC1;text-underline-offset:3px;transition:color .3s var(--ease);}
.rk-privacy a:hover{color:var(--cinnabar);}

/* 页脚 */
.rk-footer{background:var(--ink);color:rgba(247,245,241,.72);padding:76px 0 26px;font-size:14px;}
.rk-footer h4{font-family:var(--sans);font-size:13px;letter-spacing:.16em;color:rgba(247,245,241,.5);font-weight:500;margin-bottom:20px;}
.rk-footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:52px;border-bottom:1px solid rgba(247,245,241,.14);}
.rk-footer__logo{display:flex;align-items:center;gap:11px;margin-bottom:18px;}
.rk-footer__logo .rk-logo__mark{background:var(--paper);}
.rk-footer__logo .rk-logo__mark::after{background:var(--cinnabar);}
.rk-footer__logo strong{font-family:var(--serif);font-size:18px;color:var(--paper);font-weight:900;}
.rk-footer__slogan{color:rgba(247,245,241,.86);font-size:14.5px;margin-bottom:12px;}
.rk-footer__desc{font-size:13.5px;line-height:1.9;color:rgba(247,245,241,.5);max-width:320px;}
.rk-footer__links{display:grid;gap:11px;}
.rk-footer__links a{color:rgba(247,245,241,.72);transition:color .3s var(--ease);}
.rk-footer__links a:hover{color:var(--cinnabar);}
.rk-footer__contact strong{display:block;font-family:var(--serif);font-size:22px;color:var(--paper);letter-spacing:.01em;margin-bottom:10px;}
.rk-footer__contact p{font-size:13px;color:rgba(247,245,241,.5);margin-bottom:8px;}
.rk-footer__contact .rk-btn{margin-top:12px;}
.rk-footer__bottom{
  padding-top:24px;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:rgba(247,245,241,.42);
}
.rk-footer__bottom-links{display:flex;gap:22px;}
.rk-footer__bottom-links a{color:rgba(247,245,241,.55);transition:color .3s var(--ease);}
.rk-footer__bottom-links a:hover{color:var(--cinnabar);}

/* 抽屉导航 */
.rk-drawer{position:fixed;inset:0;z-index:120;pointer-events:none;}
.rk-drawer__mask{position:absolute;inset:0;background:rgba(22,24,26,.5);opacity:0;transition:opacity .4s var(--ease);}
.rk-drawer__panel{
  position:absolute;top:0;right:0;bottom:0;width:320px;max-width:86vw;
  background:var(--paper);padding:26px 26px 40px;
  transform:translateX(100%);transition:transform .46s var(--ease);
  display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.rk-drawer.is-open{pointer-events:auto;}
.rk-drawer.is-open .rk-drawer__mask{opacity:1;}
.rk-drawer.is-open .rk-drawer__panel{transform:translateX(0);}
.rk-drawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.rk-drawer__head strong{font-family:var(--serif);font-size:16px;color:var(--ink);}
.rk-drawer__close{width:44px;height:44px;border:1px solid var(--border);border-radius:var(--r-btn);display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--text-2);background:var(--card);}
.rk-drawer__close:hover{border-color:var(--cinnabar);color:var(--cinnabar);}
.rk-drawer__panel > a{
  padding:15px 2px;border-bottom:1px solid var(--line);font-size:16px;color:var(--text-2);
  opacity:0;transform:translateY(10px);transition:opacity .4s var(--ease),transform .4s var(--ease),color .3s var(--ease);
}
.rk-drawer.is-open .rk-drawer__panel > a{opacity:1;transform:none;}
.rk-drawer.is-open .rk-drawer__panel > a:nth-child(2){transition-delay:.06s;}
.rk-drawer.is-open .rk-drawer__panel > a:nth-child(3){transition-delay:.11s;}
.rk-drawer.is-open .rk-drawer__panel > a:nth-child(4){transition-delay:.16s;}
.rk-drawer.is-open .rk-drawer__panel > a:nth-child(5){transition-delay:.21s;}
.rk-drawer__panel > a:hover,.rk-drawer__panel > a.is-active{color:var(--cinnabar);}
.rk-drawer__panel .rk-btn{margin-top:26px;}

/* 弹层 */
.rk-modal{position:fixed;inset:0;z-index:140;display:flex;align-items:center;justify-content:center;pointer-events:none;}
.rk-modal__mask{position:absolute;inset:0;background:rgba(22,24,26,.55);opacity:0;transition:opacity .4s var(--ease);}
.rk-modal__panel{
  position:relative;width:520px;max-width:92vw;max-height:88vh;overflow-y:auto;
  background:var(--card);border-radius:var(--r-card);padding:38px 38px 34px;
  transform:translateY(16px);opacity:0;transition:transform .46s var(--ease),opacity .4s var(--ease);
}
.rk-modal.is-open{pointer-events:auto;}
.rk-modal.is-open .rk-modal__mask{opacity:1;}
.rk-modal.is-open .rk-modal__panel{transform:none;opacity:1;}
.rk-modal__close{position:absolute;top:16px;right:16px;width:44px;height:44px;display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--text-3);border-radius:var(--r-btn);}
.rk-modal__close:hover{color:var(--cinnabar);background:var(--paper-2);}
.rk-modal__panel h3{font-size:23px;color:var(--ink);}
.rk-modal__sub{margin-top:10px;font-size:14.5px;color:var(--text-2);}
.rk-modal .rk-form{background:transparent;border:0;padding:0;margin-top:24px;}
.rk-modal .rk-field label{color:var(--text-2);}
.rk-modal .rk-input,.rk-modal .rk-select,.rk-modal .rk-textarea{background:var(--paper);border-color:var(--border);color:var(--text);}
.rk-modal .rk-input:focus,.rk-modal .rk-select:focus,.rk-modal .rk-textarea:focus{border-color:var(--cinnabar);background:#fff;}
.rk-modal .rk-check{color:var(--text-3);}
.rk-modal .rk-check a{color:var(--text-2);}
.rk-modal .rk-check input{border-color:#C9C4BB;}
.rk-modal .rk-form__ok h3{color:var(--ink);}
.rk-modal .rk-form__ok p{color:var(--text-2);}

/* 回到顶部 */
.rk-totop{
  position:fixed;right:24px;bottom:28px;z-index:100;
  width:44px;height:44px;border-radius:999px;background:var(--ink);color:var(--paper);
  display:flex;align-items:center;justify-content:center;
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .4s var(--ease),transform .4s var(--ease),background-color .3s var(--ease);
}
.rk-totop.is-on{opacity:1;transform:none;pointer-events:auto;}
.rk-totop:hover{background:var(--cinnabar);}

/* 入场动效 */
.rk-rise{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.rk-rise.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  .rk-rise{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* 断点 */
@media screen and (max-width:1200px){
  .rk-pagehead__grid{gap:40px;}
  .rk-split,.rk-split--reverse{gap:38px;}
}
@media screen and (max-width:900px){
  :root{--nav-h:68px;}
  .rk-nav{display:none;}
  .rk-header__actions .rk-btn{display:none;}
  .rk-burger{display:flex;}
  .rk-pagehead{padding:22px 0 56px;}
  .rk-pagehead__grid{grid-template-columns:1fr;gap:34px;padding-top:22px;}
  .rk-pagehead__media img{height:260px;}
  .rk-pagehead__media::after{display:none;}
  .rk-badge{left:12px;bottom:12px;}
  .rk-section{padding:68px 0;}
  .rk-section--tight{padding:54px 0;}
  .rk-cases{grid-template-columns:1fr;gap:24px;}
  .rk-metrics{grid-template-columns:repeat(2,1fr);gap:26px;}
  .rk-split,.rk-split--reverse{grid-template-columns:1fr;gap:30px;}
  .rk-split__media img{height:280px;}
  .rk-quotes{grid-template-columns:1fr;gap:20px;}
  .rk-cta{padding:68px 0;}
  .rk-cta__grid{grid-template-columns:1fr;gap:36px;}
  .rk-footer__grid{grid-template-columns:1fr 1fr;gap:34px;}
  .rk-darkband{padding:56px 0;}
  .rk-darkband__head{margin-bottom:32px;}
}
@media screen and (max-width:640px){
  body{font-size:15.5px;}
  .grid-container.rk-container{padding-left:18px;padding-right:18px;}
  .rk-topbar__right span.tel{display:none;}
  .rk-logo__text strong{font-size:16px;}
  .rk-logo__text em{display:none;}
  .rk-pagehead h1{font-size:clamp(26px,7vw,34px);}
  .rk-lede{font-size:16px;margin-top:16px;}
  .rk-pagehead__cta{gap:16px;}
  .rk-btn{height:48px;padding:0 22px;font-size:14.5px;}
  .rk-pagehead__cta .rk-btn{width:100%;}
  .rk-cases{grid-template-columns:1fr;}
  .rk-case__body{padding:22px 20px 24px;}
  .rk-metrics{grid-template-columns:1fr;gap:22px;}
  .rk-metric{border-left:0;border-top:1px solid rgba(247,245,241,.16);padding:20px 0 0;}
  .rk-form{padding:24px 20px;}
  .rk-form__row{grid-template-columns:1fr;gap:0;}
  .rk-footer__grid{grid-template-columns:1fr;}
  .rk-footer{padding:56px 0 22px;}
  .rk-faq__q{font-size:16px;padding:22px 0;}
  .rk-faq__a-inner{padding-right:20px;}
  .rk-modal__panel{width:100%;max-width:100%;border-radius:6px 6px 0 0;padding:30px 20px 34px;align-self:flex-end;}
  .rk-modal{align-items:flex-end;}
  .rk-totop{right:16px;bottom:18px;}
}