/* roulang page: index */
/* ============ 1. 设计变量 ============ */
:root{
  --ink:#0D1412;
  --ink-2:#1B2624;
  --ink-3:#243330;
  --lime:#C8F24B;
  --lime-soft:rgba(200,242,75,.22);
  --lime-line:rgba(200,242,75,.34);
  --orange:#FF6A3D;
  --bg:#F7F5F0;
  --bg-soft:#F1EEE6;
  --card:#FFFFFF;
  --line:#E4E1D8;
  --line-soft:#EFEDE6;
  --muted:#6B7573;
  --text:#17201E;
  --dark-text:#F2F0E9;
  --dark-muted:rgba(242,240,233,.72);
  --r-card:14px;
  --r-img:16px;
  --r-input:10px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(13,20,18,.04);
  --sh-2:0 14px 32px -14px rgba(13,20,18,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --hh:76px;
  --max:1200px;
}

/* ============ 2. 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px;}
html,body{max-width:100%;overflow-x:hidden;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'Inter','Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:color .24s var(--ease);}
a:hover,a:focus{color:inherit;}
img{max-width:100%;display:block;height:auto;border:0;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,select,textarea{font:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px;}
::selection{background:var(--lime);color:var(--ink);}

/* ============ 3. 版式层级 ============ */
h1{font-size:clamp(2rem,3.5vw,2.95rem);line-height:1.16;font-weight:800;letter-spacing:.002em;color:var(--ink);}
h2{font-size:clamp(1.62rem,2.6vw,2.3rem);line-height:1.26;font-weight:700;color:var(--ink);}
h3{font-size:1.2rem;line-height:1.45;font-weight:700;color:var(--ink);}
p{font-size:17px;line-height:1.85;}

/* ============ 4. 容器与区块 ============ */
.grid-container{max-width:var(--max);padding-left:24px;padding-right:24px;}
.section{padding:104px 0;}
.section-tight{padding:78px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:36px;margin-bottom:52px;}
.section-head h2{margin-bottom:12px;}
.section-head p{color:var(--muted);font-size:16px;line-height:1.8;max-width:56ch;}
.section-head .head-side{flex:0 0 auto;}
.rule{height:1px;background:var(--line);border:0;margin:0;}

/* ============ 5. 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;
  transition:transform .24s var(--ease),background-color .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.btn i{font-size:13px;transition:transform .24s var(--ease);}
.btn:hover{transform:translateY(-1px);}
.btn:hover i{transform:translateX(2px);}
.btn:active{transform:translateY(0);}
.btn-primary{background:var(--ink);color:var(--lime);box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--ink-2);color:var(--lime);box-shadow:var(--sh-2);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:#F2F0E9;}
.btn-lime{background:var(--lime);color:var(--ink);}
.btn-lime:hover{background:#D6F96F;color:var(--ink);}
.btn-light{background:#fff;color:var(--ink);border-color:var(--line);}
.btn-light:hover{background:#fff;border-color:var(--ink);color:var(--ink);box-shadow:var(--sh-2);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-lg{padding:15px 26px;font-size:16px;}
.btn-block{width:100%;}
.pill{border-radius:var(--r-pill);}

/* ============ 6. 徽章与标签 ============ */
.badge{
  display:inline-block;background:var(--lime-soft);color:#3D4A10;
  font-size:12.5px;font-weight:600;line-height:1.6;
  padding:3px 10px;border-radius:6px;letter-spacing:.02em;
}
.badge-warm{background:rgba(255,106,61,.14);color:#9A3413;}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;letter-spacing:.06em;color:var(--muted);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);
  padding:6px 15px;margin-bottom:22px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--lime);box-shadow:0 0 0 3px rgba(200,242,75,.32);}

/* ============ 7. 顶部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--hh);
  background:rgba(247,245,240,.88);
  -webkit-backdrop-filter:blur(12px) saturate(150%);
  backdrop-filter:blur(12px) saturate(150%);
  border-bottom:1px solid transparent;
  transition:height .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header.is-shrunk{height:64px;border-bottom-color:var(--line);box-shadow:0 1px 12px rgba(13,20,18,.05);}
.hdr{display:flex;align-items:center;gap:20px;height:100%;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  position:relative;width:36px;height:36px;border-radius:8px;
  background:var(--ink);color:var(--lime);
  display:grid;place-items:center;
  font-family:'Inter',sans-serif;font-size:13px;font-weight:800;letter-spacing:.02em;
  overflow:hidden;flex:0 0 auto;
}
.brand-mark::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--lime);}
.brand-name{display:flex;align-items:baseline;gap:6px;line-height:1.1;}
.brand-name b{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:.01em;white-space:nowrap;}
.brand-name i{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.05em;white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:6px;}
.main-nav a{
  position:relative;padding:10px 12px;border-radius:8px;
  font-size:14px;font-weight:500;color:var(--text);white-space:nowrap;
  transition:color .24s var(--ease);
}
.main-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left center;
  transition:transform .24s var(--ease);
}
.main-nav a:hover::after,.main-nav a.is-active::after{transform:scaleX(1);}
.main-nav a:hover{color:var(--ink);}
.main-nav a.is-active{color:var(--ink);font-weight:600;}
.hdr-tools{display:flex;align-items:center;gap:12px;margin-left:auto;flex:0 0 auto;}
.cmd-search{
  position:relative;display:flex;align-items:center;
  width:250px;height:40px;padding:0 10px 0 34px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-input);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.cmd-search > i{position:absolute;left:12px;font-size:13px;color:var(--muted);}
.cmd-search input{width:100%;border:0;outline:0;background:transparent;font-size:14px;color:var(--text);line-height:40px;height:38px;}
.cmd-search input::placeholder{color:#9AA3A1;}
.cmd-search:focus-within{border-color:var(--lime);box-shadow:0 0 0 3px rgba(200,242,75,.35);}
.kbd{
  flex:0 0 auto;margin-left:8px;padding:2px 6px;border:1px solid var(--line);border-radius:6px;
  font-size:11px;color:var(--muted);background:var(--bg);font-family:'Inter',sans-serif;
}
.icon-link{
  width:40px;height:40px;border-radius:var(--r-input);
  display:grid;place-items:center;color:var(--ink);
  border:1px solid var(--line);background:#fff;
  transition:border-color .24s var(--ease),color .24s var(--ease),background-color .24s var(--ease);
}
.icon-link:hover{border-color:var(--ink);color:var(--ink);}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:var(--r-input);
  border:1px solid var(--line);background:#fff;
  padding:11px 10px;flex-direction:column;justify-content:space-between;
}
.nav-toggle span{display:block;height:2px;width:100%;background:var(--ink);border-radius:2px;transition:transform .24s var(--ease),opacity .24s var(--ease);}
.nav-toggle.is-open span:nth-child(1){transform:translateY(8px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-8px) rotate(-45deg);}

/* ============ 8. 移动抽屉 ============ */
.mobile-drawer{
  position:fixed;inset:0;z-index:99;
  background:var(--bg);
  padding:calc(var(--hh) + 26px) 24px 40px;
  display:flex;flex-direction:column;
  transform:translateY(-102%);opacity:0;visibility:hidden;
  transition:transform .36s var(--ease),opacity .36s var(--ease),visibility .36s var(--ease);
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateY(0);opacity:1;visibility:visible;}
.mobile-drawer a.drawer-link{
  display:block;font-size:21px;font-weight:700;color:var(--ink);
  padding:18px 2px;border-bottom:1px solid var(--line);
}
.mobile-drawer a.drawer-link.is-active{color:var(--ink);}
.mobile-drawer a.drawer-link.is-active::after{content:"当前";float:right;font-size:12px;font-weight:600;color:#4E6B00;background:var(--lime-soft);padding:2px 9px;border-radius:6px;margin-top:8px;}
.drawer-foot{margin-top:auto;padding-top:32px;}
.drawer-foot .btn{width:100%;height:52px;}
body.drawer-open{overflow:hidden;}

/* ============ 9. 首屏 ============ */
.hero{position:relative;padding:calc(var(--hh) + 68px) 0 96px;overflow:hidden;}
.hero-watermark{
  position:absolute;top:60px;right:-60px;
  font-family:'Noto Sans SC',sans-serif;font-size:520px;font-weight:900;line-height:1;
  color:var(--ink);opacity:.045;pointer-events:none;user-select:none;
}
.hero-grid{row-gap:52px;}
.hero-copy h1{margin-bottom:20px;}
.hero-sub{font-size:17px;line-height:1.8;color:var(--muted);max-width:44ch;margin-bottom:32px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:44px;}
.hero-stats{display:flex;flex-wrap:wrap;row-gap:22px;}
.hero-stats li{padding:0 26px;border-left:1px solid var(--line);}
.hero-stats li:first-child{padding-left:0;border-left:0;}
.hero-stats strong{display:block;font-family:'Inter',sans-serif;font-size:27px;font-weight:800;line-height:1.15;color:var(--ink);}
.hero-stats span{display:block;font-size:13px;color:var(--muted);margin-top:2px;}
.hero-visual img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:18px;border:1px solid var(--line);box-shadow:var(--sh-2);
}
.hero-visual{position:relative;}

/* ============ 10. 卖点区 ============ */
.feature-list{border-top:1px solid var(--line);}
.feature-row{
  display:grid;grid-template-columns:56px minmax(180px,270px) 1fr 28px;
  align-items:center;gap:26px;
  padding:26px 18px;border-bottom:1px solid var(--line);
  cursor:pointer;
  transition:background-color .28s var(--ease),padding-left .28s var(--ease);
}
.feature-row:hover{background:var(--bg-soft);padding-left:28px;}
.f-num{font-family:'Inter',sans-serif;font-size:14px;font-weight:700;color:var(--muted);letter-spacing:.08em;}
.f-title{font-size:17px;font-weight:700;color:var(--ink);line-height:1.5;}
.f-desc{font-size:15px;color:var(--muted);line-height:1.75;}
.f-arrow{color:var(--muted);font-size:14px;transition:transform .28s var(--ease),color .28s var(--ease);}
.feature-row:hover .f-arrow{transform:translateX(4px);color:var(--ink);}

/* ============ 11. 演示区 ============ */
.demo-item{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;}
.demo-item + .demo-item{margin-top:96px;}
.demo-item.is-reverse .demo-media{order:2;}
.demo-step{
  display:block;font-family:'Inter',sans-serif;
  font-size:clamp(3rem,5.4vw,4.2rem);font-weight:800;line-height:1;margin-bottom:14px;
  color:rgba(13,20,18,.12);
  -webkit-text-stroke:1.5px rgba(13,20,18,.3);
  -webkit-text-fill-color:transparent;
}
.demo-copy h3{margin-bottom:12px;font-size:1.35rem;}
.demo-copy > p{color:var(--muted);font-size:16px;margin-bottom:20px;}
.demo-points{display:grid;gap:10px;}
.demo-points li{position:relative;padding-left:20px;font-size:15px;color:var(--text);line-height:1.75;}
.demo-points li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;background:var(--lime);border-radius:2px;}
.demo-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-img);border:1px solid var(--line);box-shadow:var(--sh-1);
  transition:transform .42s var(--ease),box-shadow .42s var(--ease);
}
.demo-media:hover img{transform:scale(1.03);box-shadow:var(--sh-2);}

/* ============ 12. 证据区（深色） ============ */
.proof{background:var(--ink);color:var(--dark-text);padding:110px 0;}
.proof h2{color:#fff;}
.proof .section-head p{color:var(--dark-muted);}
.proof-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:rgba(242,240,233,.14);
  border:1px solid rgba(242,240,233,.14);border-radius:var(--r-card);overflow:hidden;
  margin:0 0 12px;
}
.proof-stat{background:var(--ink);padding:32px 24px;}
.proof-stat strong{display:block;font-family:'Inter',sans-serif;font-size:clamp(1.9rem,3.2vw,2.7rem);font-weight:800;line-height:1.1;color:var(--lime);}
.proof-stat span{display:block;margin-top:8px;font-size:14px;color:var(--dark-muted);line-height:1.7;}
.proof-tags{display:flex;flex-wrap:wrap;gap:12px;margin-top:44px;}
.proof-tags li{
  flex:1 1 150px;display:flex;align-items:center;justify-content:center;
  height:62px;padding:0 16px;text-align:center;
  border:1px solid rgba(242,240,233,.16);border-radius:10px;
  font-size:13.5px;letter-spacing:.03em;color:rgba(242,240,233,.55);
  transition:color .28s var(--ease),border-color .28s var(--ease),background-color .28s var(--ease);
}
.proof-tags li:hover{color:var(--lime);border-color:var(--lime-line);background:rgba(200,242,75,.06);}
.proof-quotes{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:44px;}
.quote{background:var(--ink-2);border:1px solid rgba(242,240,233,.16);border-radius:var(--r-card);padding:28px;}
.quote p{font-size:16px;line-height:1.8;color:var(--dark-text);margin-bottom:16px;}
.quote footer{font-size:13px;color:var(--dark-muted);}

/* ============ 13. 方案区 ============ */
.plans{margin-top:6px;}
.plan{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);padding:32px 28px;box-shadow:var(--sh-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
  height:100%;
}
.plan:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--ink);}
.plan.is-featured{border:2px solid var(--lime);margin-top:-8px;padding-top:38px;}
.plan-badge{
  position:absolute;top:-13px;left:26px;
  background:var(--lime);color:var(--ink);
  font-size:12px;font-weight:700;padding:4px 12px;border-radius:var(--r-pill);
}
.plan h3{font-size:1.1rem;margin-bottom:6px;}
.plan-note{font-size:14px;color:var(--muted);line-height:1.7;}
.plan-price{font-family:'Inter',sans-serif;font-size:34px;font-weight:800;line-height:1;color:var(--ink);margin:18px 0 4px;}
.plan-price small{font-family:inherit;font-size:14px;font-weight:500;color:var(--muted);margin-left:6px;}
.plan-list{display:grid;gap:12px;margin:22px 0 26px;}
.plan-list li{display:flex;gap:10px;font-size:15px;line-height:1.65;color:var(--text);}
.plan-list li i{color:#7BA300;font-size:12px;margin-top:6px;flex:0 0 auto;}
.pricing-foot{margin-top:34px;font-size:14px;color:var(--muted);line-height:1.8;}

/* ============ 14. 资讯区（CMS） ============ */
.news-feature{
  display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:32px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.news-feature:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--ink);}
.nf-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:12px;}
.nf-body{display:flex;flex-direction:column;padding:6px 4px;}
.nf-body h3{font-size:1.35rem;margin:14px 0 12px;line-height:1.42;}
.nf-body h3 a{background-image:linear-gradient(var(--ink),var(--ink));background-size:0 1px;background-repeat:no-repeat;background-position:0 100%;transition:background-size .32s var(--ease);}
.news-feature:hover .nf-body h3 a{background-size:100% 1px;}
.nf-body > p{color:var(--muted);font-size:15.5px;line-height:1.8;margin-bottom:20px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:auto;font-size:13px;color:var(--muted);}
.meta-more{font-weight:600;color:var(--ink);font-size:14px;}
.meta-more i{margin-left:4px;font-size:12px;transition:transform .24s var(--ease);}
.meta-more:hover i{transform:translateX(3px);}
.news-row{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:24px;}
.news-card{
  display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--ink);}
.news-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.nc-body{padding:20px 22px 24px;}
.nc-body h3{font-size:1.1rem;line-height:1.45;margin:12px 0 10px;}
.nc-body p{font-size:14.5px;color:var(--muted);line-height:1.75;margin-bottom:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.nc-meta{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted);}
.news-empty{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:64px 24px;background:var(--card);border:1px dashed var(--line);border-radius:var(--r-card);
  text-align:center;
}
.news-empty i{font-size:26px;color:var(--muted);}
.news-empty p{color:var(--muted);font-size:16px;}
.link-more{font-size:15px;font-weight:600;color:var(--ink);white-space:nowrap;border-bottom:1px solid var(--line);padding-bottom:2px;transition:border-color .24s var(--ease);}
.link-more:hover{border-color:var(--ink);}
.link-more i{margin-left:6px;font-size:12px;transition:transform .24s var(--ease);}
.link-more:hover i{transform:translateX(3px);}

/* ============ 15. FAQ ============ */
.faq-list{border-top:1px solid var(--line);}
.faq-list > li{border-bottom:1px solid var(--line);}
.faq-list .accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:24px 4px;background:transparent;border:0;border-radius:0;
  font-size:17px;font-weight:600;line-height:1.6;color:var(--ink);
  transition:color .24s var(--ease);
}
.faq-list .accordion-title:hover{color:var(--ink);}
.faq-list .accordion-title::before{content:none;display:none;}
.faq-list .accordion-title::after{
  content:"+";flex:0 0 auto;font-family:'Inter',sans-serif;
  font-size:24px;font-weight:300;line-height:1;color:var(--ink);
  transition:transform .28s var(--ease),color .28s var(--ease);
}
.faq-list .accordion-title[aria-expanded="true"]::after{transform:rotate(45deg);color:#6E9B00;}
.faq-list .accordion-content{
  padding:0 4px 26px 12px;background:transparent;border:0;color:var(--muted);
  font-size:16px;line-height:1.85;
}

/* ============ 16. 结尾 CTA ============ */
.final-cta{
  position:relative;overflow:hidden;
  background:var(--ink);color:var(--dark-text);
  border-radius:24px;padding:60px 56px;
  display:grid;grid-template-columns:1.35fr 1fr;gap:40px;align-items:center;
}
.final-cta h2{color:#fff;margin-bottom:14px;}
.final-cta p{color:var(--dark-muted);font-size:16px;line-height:1.8;max-width:48ch;}
.final-cta .cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}
.final-cta-watermark{
  position:absolute;right:-20px;bottom:-90px;font-family:'Inter',sans-serif;
  font-size:280px;font-weight:800;line-height:1;color:rgba(200,242,75,.06);
  pointer-events:none;user-select:none;
}

/* ============ 17. 页脚 ============ */
.site-footer{background:var(--ink);color:var(--dark-text);padding:72px 0 0;}
.footer-grid{row-gap:40px;}
.footer-brand .brand-name b{color:#fff;}
.footer-brand .brand-name i{color:var(--dark-muted);}
.footer-brand p{margin-top:18px;font-size:15px;line-height:1.85;color:var(--dark-muted);max-width:34ch;}
.footer-col h4{font-size:13px;font-weight:600;letter-spacing:.1em;color:rgba(242,240,233,.52);margin-bottom:18px;}
.footer-col a{display:block;font-size:15px;color:var(--dark-text);padding:6px 0;transition:color .24s var(--ease),transform .24s var(--ease);}
.footer-col a:hover{color:var(--lime);transform:translateX(-3px);}
.footer-col p{font-size:15px;color:var(--dark-muted);line-height:1.85;}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(242,240,233,.14);
  padding:24px 0;display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(242,240,233,.6);
}
.footer-bottom a{color:rgba(242,240,233,.6);}
.footer-bottom a:hover{color:var(--lime);}

/* ============ 18. 浮动 CTA ============ */
.float-cta{
  position:fixed;right:28px;bottom:32px;z-index:90;
  display:flex;align-items:center;gap:10px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .32s var(--ease),transform .32s var(--ease),visibility .32s var(--ease);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.btn-top{
  width:48px;height:48px;border-radius:50%;padding:0;
  background:#fff;border:1px solid var(--line);color:var(--ink);
  display:grid;place-items:center;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease),transform .24s var(--ease);
}
.btn-top:hover{border-color:var(--ink);box-shadow:var(--sh-2);transform:translateY(-1px);}

/* ============ 19. 滚动入场 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .54s var(--ease),transform .54s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ============ 20. 响应式 ============ */
@media screen and (max-width:1250px){
  .cmd-search{width:190px;}
  .main-nav a{font-size:13.5px;padding:10px 10px;}
  .main-nav a::after{left:10px;right:10px;}
}
@media screen and (max-width:1120px){
  .main-nav{display:none;}
  .cmd-search{display:none;}
  .icon-link{display:none;}
  .nav-toggle{display:flex;}
  .hdr-tools .btn{display:none;}
}
@media screen and (max-width:1024px){
  .section{padding:88px 0;}
  .section-tight{padding:70px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:20px;margin-bottom:42px;}
  .hero{padding:calc(var(--hh) + 48px) 0 76px;}
  .hero-watermark{font-size:360px;top:80px;right:-80px;}
  .demo-item{gap:40px;}
  .demo-item + .demo-item{margin-top:76px;}
  .proof{padding:88px 0;}
  .proof-stats{grid-template-columns:repeat(2,1fr);}
  .proof-quotes{grid-template-columns:1fr;}
  .final-cta{grid-template-columns:1fr;padding:48px 36px;}
  .final-cta .cta-actions{justify-content:flex-start;}
}
@media screen and (max-width:767px){
  body{font-size:16px;}
  .grid-container{padding-left:20px;padding-right:20px;}
  .section{padding:64px 0;}
  .section-tight{padding:56px 0;}
  .hero-stats li{padding:0 18px;}
  .hero-stats li:nth-child(3){padding-left:0;border-left:0;}
  .feature-row{grid-template-columns:44px 1fr 20px;gap:14px;padding:22px 10px;}
  .f-desc{grid-column:2 / 4;margin-top:6px;}
  .feature-row:hover{padding-left:16px;}
  .demo-item{grid-template-columns:1fr;gap:26px;}
  .demo-item.is-reverse .demo-media{order:0;}
  .demo-item + .demo-item{margin-top:64px;}
  .plans .cell{margin-bottom:24px;}
  .plan.is-featured{margin-top:0;}
  .news-feature{grid-template-columns:1fr;gap:20px;padding:18px;}
  .news-row{grid-template-columns:1fr;}
  .faq-list .accordion-title{font-size:16px;padding:20px 2px;gap:16px;}
  .faq-list .accordion-content{padding-left:6px;}
  .final-cta{border-radius:18px;padding:36px 24px;}
  .final-cta-watermark{font-size:180px;bottom:-60px;}
  .site-footer{padding-bottom:84px;}
  .float-cta{
    left:0;right:0;bottom:0;gap:10px;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    background:rgba(247,245,240,.95);
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
    border-top:1px solid var(--line);
  }
  .float-cta .float-main{flex:1 1 auto;height:56px;border-radius:14px;}
  .btn-top{width:56px;height:56px;border-radius:14px;flex:0 0 auto;}
}
@media screen and (max-width:520px){
  h1{font-size:1.86rem;}
  .hero-actions .btn{width:100%;}
  .hero-stats{gap:0 0;}
  .hero-stats li{width:50%;padding:0 12px;margin-bottom:20px;}
  .hero-stats li:nth-child(odd){padding-left:0;border-left:0;}
  .proof-stats{grid-template-columns:1fr;}
  .brand-name i{display:none;}
}
@media screen and (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .reveal{transform:none !important;transition:opacity .3s linear;}
  .btn:hover,.plan:hover,.news-card:hover,.news-feature:hover,.demo-media:hover img{transform:none !important;}
  .btn:hover i,.link-more:hover i{transform:none !important;}
}

/* roulang page: article */
:root{
  --ink:#0D1412;
  --ink-2:#1B2624;
  --lime:#C8F24B;
  --orange:#FF6A3D;
  --bg:#F7F5F0;
  --card:#FFFFFF;
  --line:#E4E1D8;
  --muted:#6B7573;
  --text:#17201E;
  --r-card:14px;
  --r-img:16px;
  --r-input:10px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(13,20,18,.04);
  --sh-2:0 14px 32px -14px rgba(13,20,18,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --hdr:76px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:17px;line-height:1.85;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .24s var(--ease)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding-left:0;list-style:none}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px}
::selection{background:rgba(200,242,75,.5);color:var(--ink)}
.grid-container{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;width:100%}
@media screen and (max-width:39.9375em){
  .grid-container{padding-left:20px;padding-right:20px}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--r-btn);font-size:15px;font-weight:600;line-height:1.3;
  border:1px solid transparent;cursor:pointer;background:transparent;
  transition:transform .24s var(--ease),background .24s var(--ease),color .24s var(--ease),
             box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.btn i{transition:transform .24s var(--ease)}
.btn:hover i{transform:translateX(2px)}
.btn-primary{background:var(--ink);color:var(--lime);border-color:var(--ink)}
.btn-primary:hover{background:#1B2624;color:#DDF88C;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#F2F0E9;transform:translateY(-1px)}
.btn-lime{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.btn-lime:hover{background:#D6F86F;transform:translateY(-1px);box-shadow:0 14px 32px -16px rgba(200,242,75,.9)}
.btn-outline-light{background:transparent;border-color:rgba(242,240,233,.42);color:#F2F0E9}
.btn-outline-light:hover{background:rgba(242,240,233,.12);border-color:#F2F0E9;transform:translateY(-1px)}
.pill{border-radius:999px}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,240,.9);
  -webkit-backdrop-filter:blur(14px) saturate(1.25);
  backdrop-filter:blur(14px) saturate(1.25);
  border-bottom:1px solid transparent;
  transition:box-shadow .28s var(--ease),border-color .28s var(--ease),background .28s var(--ease);
}
.site-header.is-shrunk{
  --hdr:64px;
  background:rgba(247,245,240,.95);
  border-bottom-color:var(--line);
  box-shadow:0 1px 0 rgba(13,20,18,.03),0 10px 26px -22px rgba(13,20,18,.45);
}
.header-inner{display:flex;align-items:center;gap:20px;height:var(--hdr);transition:height .28s var(--ease)}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:8px;background:var(--ink);color:var(--lime);
  display:grid;place-items:center;font-size:18px;font-weight:800;line-height:1;flex:0 0 auto;
}
.brand-mark::before{content:"";position:absolute}
.brand-text{display:flex;align-items:baseline;gap:6px;white-space:nowrap}
.brand-text b{font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--ink)}
.brand-text i{font-style:normal;font-size:13px;color:var(--muted);letter-spacing:.02em}
.main-nav{display:flex;align-items:center;gap:2px;margin:0 auto}
.main-nav a{
  position:relative;padding:8px 13px;font-size:15px;color:#3B4644;border-radius:8px;white-space:nowrap;
  transition:color .24s var(--ease),background .24s var(--ease);
}
.main-nav a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;border-radius:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left center;
  transition:transform .24s var(--ease);
}
.main-nav a:hover{color:var(--ink);background:rgba(228,225,216,.45)}
.main-nav a:hover::after,.main-nav a.is-active::after{transform:scaleX(1)}
.main-nav a.is-active{color:var(--ink);font-weight:700}
.header-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.command-search{
  display:flex;align-items:center;gap:8px;height:40px;width:222px;
  padding:0 10px 0 12px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-input);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.command-search i{color:var(--muted);font-size:13px;flex:0 0 auto}
.command-search input{border:0;outline:0;background:transparent;font-size:14px;width:100%;min-width:0;line-height:1.4}
.command-search input::placeholder{color:#9AA3A1}
.command-search:focus-within{border-color:var(--lime);box-shadow:0 0 0 3px rgba(200,242,75,.4)}
.kbd{
  flex:0 0 auto;font-size:11px;color:var(--muted);border:1px solid var(--line);
  border-radius:5px;padding:1px 5px;background:#FAF9F5;letter-spacing:.02em;
}
.icon-entry{
  width:40px;height:40px;border-radius:var(--r-input);border:1px solid var(--line);background:var(--card);
  display:grid;place-items:center;color:var(--ink);font-size:15px;
  transition:border-color .24s var(--ease),background .24s var(--ease),transform .24s var(--ease);
}
.icon-entry:hover{border-color:var(--ink);transform:translateY(-1px)}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-input);
  background:var(--card);cursor:pointer;position:relative;flex:0 0 auto;
}
.nav-toggle span{
  position:absolute;left:11px;right:11px;height:2px;border-radius:2px;background:var(--ink);
  transition:transform .24s var(--ease);
}
.nav-toggle span:nth-child(1){top:14px}
.nav-toggle span:nth-child(2){top:24px}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){transform:translateY(-5px) rotate(-45deg)}

.nav-drawer{
  position:fixed;inset:0;z-index:80;padding:96px 24px 40px;overflow-y:auto;
  background:rgba(247,245,240,.985);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  display:flex;flex-direction:column;gap:2px;
  transform:translateY(-100%);visibility:hidden;
  transition:transform .36s var(--ease),visibility .36s var(--ease);
}
.nav-drawer.is-open{transform:translateY(0);visibility:visible}
.nav-drawer a.drawer-link{
  font-size:21px;font-weight:700;color:var(--ink);padding:15px 0;border-bottom:1px solid var(--line);
  transition:color .24s var(--ease),padding-left .24s var(--ease);
}
.nav-drawer a.drawer-link:hover{color:#5E6E10;padding-left:6px}
.nav-drawer .drawer-cta{margin-top:28px;align-self:flex-start}

@media screen and (max-width:63.9375em){
  .main-nav,.command-search,.icon-entry,.header-tools .pill{display:none}
  .header-tools{margin-left:auto}
  .nav-toggle{display:block}
}
@media screen and (max-width:30em){
  .brand-text b{font-size:17px}
  .brand-text i{font-size:11.5px}
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:28px;bottom:32px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:999px;
  background:var(--ink);color:var(--lime);font-size:15px;font-weight:600;
  box-shadow:0 14px 30px -14px rgba(13,20,18,.55);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .32s var(--ease),transform .32s var(--ease),visibility .32s var(--ease),background .24s var(--ease);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:#1B2624}
.float-cta i{transition:transform .24s var(--ease)}
.float-cta:hover i{transform:translateX(3px)}
@media screen and (max-width:39.9375em){
  body{padding-bottom:64px}
  .float-cta{
    left:0;right:0;bottom:0;width:100%;border-radius:0;justify-content:center;
    padding:16px 20px calc(16px + env(safe-area-inset-bottom,0px));
    transform:translateY(110%);opacity:1;visibility:visible;
  }
  .float-cta.is-visible{transform:translateY(0)}
}

/* ---------- 内容主体 ---------- */
main{padding:40px 0 0}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:28px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb span{color:#C4C0B4}
.breadcrumb em{font-style:normal;color:var(--text);max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.article-head{margin-bottom:26px}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:6px;
  background:rgba(200,242,75,.3);color:#2C3610;font-size:12.5px;font-weight:600;line-height:1.5;
}
.article-head h1{
  margin:16px 0 18px;font-size:clamp(1.9rem,3.6vw,2.9rem);line-height:1.22;font-weight:800;
  letter-spacing:-.005em;color:var(--ink);
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;font-size:13.5px;color:var(--muted)}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.article-meta i{font-size:12px;color:#A9B0AE}
.article-meta b{color:var(--ink);font-weight:600}

.article-lead{
  margin:22px 0 0;padding:16px 20px;border-radius:var(--r-card);
  background:#FFFFFF;border:1px solid var(--line);border-left:3px solid var(--lime);
  font-size:15.5px;line-height:1.85;color:#3B4644;
}

.article-cover{margin:30px 0 44px;border-radius:var(--r-img);overflow:hidden;background:#EDEAE2}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;height:auto}

.article-grid{
  display:grid;grid-template-columns:minmax(0,760px) 264px;gap:64px;
  justify-content:center;align-items:start;
}
.article-main{min-width:0}

/* 正文排版 */
.article-body{font-size:17px;line-height:1.9;color:var(--text);word-break:break-word}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.4em}
.article-body h2{
  position:relative;margin:2.2em 0 .85em;padding-left:16px;
  font-size:clamp(1.35rem,2vw,1.72rem);font-weight:700;line-height:1.4;color:var(--ink);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;border-radius:2px;background:var(--lime);
}
.article-body h3{margin:1.8em 0 .7em;font-size:1.22rem;font-weight:700;line-height:1.5;color:var(--ink)}
.article-body h4{margin:1.5em 0 .6em;font-size:1.05rem;font-weight:700;color:var(--ink)}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:0}
.article-body li{position:relative;padding-left:22px;margin-bottom:.6em}
.article-body ul>li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:2px;
  background:var(--ink);
}
.article-body ol{counter-reset:li}
.article-body ol>li::before{
  counter-increment:li;content:counter(li);position:absolute;left:0;top:.34em;
  font-size:12px;font-weight:700;color:var(--ink);background:rgba(200,242,75,.55);
  border-radius:5px;padding:1px 6px;line-height:1.5;
}
.article-body blockquote{
  margin:1.8em 0;padding:14px 20px;background:#F1EEE6;border-left:4px solid var(--ink);
  border-radius:0 var(--r-card) var(--r-card) 0;color:#2C3634;font-size:16.5px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:1.6em 0 .8em;height:auto}
.article-body figure{margin:1.8em 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:-.2em}
.article-body a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--lime);text-decoration-thickness:2px;text-underline-offset:3px}
.article-body a:hover{text-decoration-thickness:3px}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px}
.article-body thead th{background:var(--ink);color:#F2F0E9;font-weight:600;text-align:left}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;vertical-align:top}
.article-body tbody tr:nth-child(even){background:#FBFAF6}
.article-body code{background:#F1EEE6;border-radius:5px;padding:2px 6px;font-size:14px}
.article-body pre{background:#F1EEE6;border:1px solid var(--line);border-radius:12px;padding:16px 18px;overflow:auto;font-size:14px;line-height:1.7}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}

/* 目录 */
.article-aside{min-width:0}
.toc-card{
  position:sticky;top:100px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);padding:20px;box-shadow:var(--sh-1);
}
.toc-title{font-size:12.5px;font-weight:700;letter-spacing:.08em;color:var(--muted);margin-bottom:12px;text-transform:uppercase}
.toc-list{display:flex;flex-direction:column;max-height:58vh;overflow-y:auto}
.toc-list a{
  display:block;padding:7px 0 7px 12px;border-left:2px solid var(--line);
  font-size:13.5px;line-height:1.55;color:var(--muted);
  transition:border-color .24s var(--ease),color .24s var(--ease),padding-left .24s var(--ease);
}
.toc-list a.toc-sub{padding-left:24px;font-size:13px}
.toc-list a:hover{color:var(--ink);border-left-color:#B9C99A}
.toc-list a.is-current{border-left-color:var(--lime);color:var(--ink);font-weight:600}
.toc-empty{font-size:13.5px;color:var(--muted)}

/* 标签与返回 */
.article-tags{display:flex;flex-wrap:wrap;gap:10px;margin:44px 0 0;padding-top:26px;border-top:1px solid var(--line)}
.tag{
  display:inline-flex;align-items:center;padding:5px 12px;border-radius:999px;
  background:#FFFFFF;border:1px solid var(--line);font-size:13px;color:#3B4644;
  transition:border-color .24s var(--ease),color .24s var(--ease),transform .24s var(--ease);
}
.tag:hover{border-color:var(--ink);color:var(--ink);transform:translateY(-1px)}
.article-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}

/* 相关推荐 */
.related{margin:96px 0 0;padding-top:64px;border-top:1px solid var(--line)}
.sec-head{margin-bottom:34px}
.sec-head h2{font-size:clamp(1.5rem,2.4vw,2rem);font-weight:700;color:var(--ink);line-height:1.3}
.sec-head p{margin-top:10px;font-size:15.5px;color:var(--muted);max-width:640px}
.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.related-feature{
  grid-column:1 / -1;display:grid;grid-template-columns:minmax(0,.96fr) minmax(0,1.04fr);
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.related-feature:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--ink)}
.related-feature .rf-img{overflow:hidden;background:#EDEAE2}
.related-feature .rf-img img{width:100%;height:100%;min-height:240px;object-fit:cover;transition:transform .42s var(--ease)}
.related-feature:hover .rf-img img{transform:scale(1.03)}
.rf-body{padding:30px 32px;display:flex;flex-direction:column;gap:12px;justify-content:center}
.rf-body h3{font-size:1.3rem;font-weight:700;line-height:1.4;color:var(--ink)}
.rf-body p{font-size:15px;color:var(--muted);line-height:1.75}
.related-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--ink)}
.related-card .rc-img{overflow:hidden;background:#EDEAE2}
.related-card .rc-img img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .42s var(--ease)}
.related-card:hover .rc-img img{transform:scale(1.03)}
.rc-body{padding:24px;display:flex;flex-direction:column;gap:10px;flex:1}
.rc-body h3{font-size:1.08rem;font-weight:700;line-height:1.45;color:var(--ink)}
.rc-body p{font-size:14.5px;color:var(--muted);line-height:1.75}
.card-meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);margin-top:auto;padding-top:8px}
.card-meta i{font-size:12px;transition:transform .24s var(--ease)}
.related-card:hover .card-meta i,.related-feature:hover .card-meta i{transform:translateX(3px)}
@media screen and (max-width:47.9375em){
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .related-feature{grid-template-columns:minmax(0,1fr)}
  .related-feature .rf-img img{min-height:190px}
  .rf-body{padding:24px}
}

/* 收尾 CTA */
.end-cta{margin:96px 0 0;background:var(--ink-2);color:#F2F0E9;border-radius:24px;overflow:hidden}
.end-cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
  padding:56px 52px;
}
.end-cta h2{font-size:clamp(1.5rem,2.4vw,2.1rem);font-weight:700;line-height:1.3;color:#F2F0E9}
.end-cta p{margin-top:12px;font-size:15.5px;color:rgba(242,240,233,.72);max-width:520px}
.end-cta-actions{display:flex;flex-wrap:wrap;gap:14px}
@media screen and (max-width:47.9375em){
  .end-cta-inner{padding:40px 24px}
  .end-cta-actions{width:100%}
  .end-cta-actions .btn{flex:1 1 auto}
}

/* 空态 */
.empty-state{padding:96px 0 120px;text-align:center}
.empty-state .es-icon{
  width:64px;height:64px;border-radius:18px;border:1.5px dashed var(--line);
  display:grid;place-items:center;margin:0 auto 22px;color:var(--muted);font-size:22px;background:#FFFFFF;
}
.empty-state h2{font-size:1.6rem;font-weight:700;color:var(--ink)}
.empty-state p{margin:14px auto 26px;font-size:15.5px;color:var(--muted);max-width:460px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#F2F0E9;margin-top:120px;padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr .8fr .8fr 1fr;gap:44px}
.footer-logo{font-size:19px;font-weight:800;letter-spacing:-.01em;color:#F2F0E9}
.footer-logo span{color:var(--lime)}
.footer-brand p{margin-top:14px;font-size:14.5px;line-height:1.8;color:rgba(242,240,233,.66);max-width:330px}
.footer-note{
  margin-top:16px !important;display:inline-flex;align-items:center;gap:8px;
  font-size:13px !important;color:rgba(242,240,233,.55) !important;
  border:1px solid rgba(242,240,233,.16);border-radius:999px;padding:5px 13px;
}
.footer-col h4{font-size:13px;font-weight:600;letter-spacing:.08em;color:rgba(242,240,233,.5);margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:15px;color:rgba(242,240,233,.82);display:inline-block;transition:color .24s var(--ease),transform .24s var(--ease)}
.footer-col a:hover{color:var(--lime);transform:translateX(-3px)}
.footer-col li span{font-size:15px;color:rgba(242,240,233,.82)}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(242,240,233,.14);
  padding:22px 0 26px;display:flex;flex-wrap:wrap;gap:10px 24px;
  justify-content:space-between;font-size:13.5px;color:rgba(242,240,233,.55);
}
@media screen and (max-width:63.9375em){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px}
}
@media screen and (max-width:39.9375em){
  .site-footer{padding-top:56px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .footer-bottom{flex-direction:column}
}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{transform:none}
}

/* 桌面/平板切换 */
@media screen and (max-width:74.9375em){
  .article-grid{grid-template-columns:minmax(0,760px);gap:0}
  .article-aside{display:none}
}
@media screen and (max-width:47.9375em){
  main{padding-top:28px}
  .article-body{font-size:16px;line-height:1.85}
  .article-cover{margin:22px 0 34px}
  .related{margin-top:72px;padding-top:48px}
  .end-cta{margin-top:72px;border-radius:18px}
}

/* roulang page: category1 */
:root{
  --ink:#0D1412;
  --ink-2:#1B2624;
  --ink-3:#243130;
  --lime:#C8F24B;
  --lime-soft:rgba(200,242,75,.20);
  --sand:#FF6A3D;
  --bg:#F7F5F0;
  --card:#FFFFFF;
  --line:#E4E1D8;
  --muted:#6B7573;
  --text:#17201E;
  --dark-text:#F2F0E9;
  --radius-card:14px;
  --radius-img:16px;
  --radius-input:10px;
  --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(13,20,18,.04);
  --shadow-2:0 14px 32px -14px rgba(13,20,18,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1200px;
  --nav-h:76px;
  --nav-h-shrink:64px;
  --sec-space:124px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden;}
img{max-width:100%;display:block;height:auto;}
a{color:var(--text);text-decoration:none;transition:color .24s var(--ease);}
a:hover{color:var(--ink);}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding-left:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,select,textarea{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px;}
::selection{background:var(--lime);color:var(--ink);}

.grid-container{max-width:var(--container);padding-left:24px;padding-right:24px;margin-left:auto;margin-right:auto;}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(247,245,240,.88);
  -webkit-backdrop-filter:saturate(140%) blur(10px);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid transparent;
  transition:height .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease),background-color .28s var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 6px 18px -14px rgba(13,20,18,.28);
  background:rgba(247,245,240,.94);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:var(--nav-h);
  transition:height .28s var(--ease);
}
.site-header.is-scrolled .nav-inner{height:var(--nav-h-shrink);}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:8px;background:var(--ink);
  color:var(--lime);font-weight:800;font-size:19px;line-height:34px;text-align:center;
  letter-spacing:0;position:relative;overflow:hidden;
}
.brand-mark::after{content:"";position:absolute;left:50%;top:50%;width:22px;height:2px;background:var(--lime);transform:translate(-50%,-50%) rotate(-45deg);opacity:.55;}
.brand-text{display:flex;align-items:baseline;gap:6px;white-space:nowrap;}
.brand-text-a{font-family:"Inter",sans-serif;font-size:17px;font-weight:700;color:var(--ink);letter-spacing:.01em;}
.brand-text-b{font-size:13px;font-weight:500;color:var(--muted);}
.brand--footer .brand-text-a{color:var(--dark-text);}
.brand--footer .brand-text-b{color:rgba(242,240,233,.7);}

.main-nav{display:flex;align-items:center;gap:28px;margin-left:8px;}
.main-nav a{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--muted);
  padding:6px 0;
  transition:color .24s var(--ease);
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  height:2px;width:0;
  background:var(--lime);
  transition:width .24s var(--ease);
}
.main-nav a:hover{color:var(--ink);}
.main-nav a:hover::after{width:100%;}
.main-nav a.is-active{color:var(--ink);font-weight:700;}
.main-nav a.is-active::after{width:100%;}

.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto;flex:0 0 auto;}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:260px;height:42px;padding:0 10px 0 12px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-input);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.command-search:focus-within{
  border-color:var(--lime);
  box-shadow:0 0 0 3px rgba(200,242,75,.35);
}
.command-search svg{flex:0 0 auto;color:var(--muted);}
.command-search input{
  flex:1 1 auto;min-width:0;
  border:0;background:transparent;
  font-size:14px;color:var(--text);
  line-height:1.4;
}
.command-search input::placeholder{color:#9BA3A1;}
.command-search input:focus{outline:none;}
.kbd{
  flex:0 0 auto;
  font-family:"Inter",sans-serif;
  font-size:11px;font-weight:600;color:var(--muted);
  border:1px solid var(--line);
  border-radius:6px;
  padding:2px 6px;
  background:var(--bg);
}
.icon-shortcut{
  width:42px;height:42px;border-radius:var(--radius-input);
  border:1px solid var(--line);background:var(--card);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--ink);
  transition:border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.icon-shortcut:hover{border-color:var(--ink);transform:translateY(-1px);box-shadow:var(--shadow-1);}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 22px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  transition:background-color .24s var(--ease),color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
  white-space:nowrap;
}
.btn svg{transition:transform .24s var(--ease);}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn:hover svg{transform:translateX(2px);}
.btn-primary{background:var(--ink);color:var(--lime);border-color:var(--ink);}
.btn-primary:hover{background:var(--ink-2);color:var(--lime);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--dark-text);}
.btn-lime{background:var(--lime);color:var(--ink);border-color:var(--lime);}
.btn-lime:hover{background:#D6F76E;color:var(--ink);}
.btn-pill{border-radius:999px;padding:12px 20px;font-size:14px;}
.btn-sm{padding:11px 18px;font-size:14px;}

.nav-toggle{
  display:none;
  width:42px;height:42px;border-radius:var(--radius-input);
  border:1px solid var(--line);background:var(--card);
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative;transition:transform .24s var(--ease),background-color .24s var(--ease);}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);
  transition:transform .24s var(--ease),top .24s var(--ease);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg);}

.mobile-drawer{
  position:fixed;inset:0;
  background:var(--bg);
  z-index:90;
  padding:96px 24px 32px;
  display:flex;flex-direction:column;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s var(--ease);
}
.mobile-drawer.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.mobile-drawer nav{display:flex;flex-direction:column;gap:4px;margin-bottom:28px;}
.mobile-drawer nav a{
  font-size:22px;font-weight:700;color:var(--ink);
  padding:16px 0;border-bottom:1px solid var(--line);
}
.mobile-drawer nav a.is-active{color:var(--ink);}
.mobile-drawer nav a.is-active::before{content:"";display:inline-block;width:8px;height:8px;background:var(--lime);border-radius:2px;margin-right:10px;vertical-align:middle;}
.mobile-drawer .drawer-search{width:100%;margin-bottom:20px;height:48px;}
.mobile-drawer .btn{width:100%;}
.drawer-close{position:absolute;top:20px;right:20px;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-input);display:flex;align-items:center;justify-content:center;background:var(--card);}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:72px 0 88px;
  border-bottom:1px solid var(--line);
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center right;
  background-color:var(--bg);
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(247,245,240,.98) 0%,rgba(247,245,240,.94) 46%,rgba(247,245,240,.72) 100%);
}
.page-hero .hero-watermark{
  position:absolute;right:-40px;bottom:-90px;
  font-size:340px;line-height:1;font-weight:800;color:var(--ink);
  opacity:.05;pointer-events:none;user-select:none;
}
.page-hero .grid-container{position:relative;z-index:2;}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:22px;flex-wrap:wrap;}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--ink);}
.crumbs span.sep{color:#B8BFBD;}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--ink);
  background:var(--lime-soft);
  border-radius:6px;
  padding:6px 12px;
  margin-bottom:20px;
}
.eyebrow::before{content:"";width:6px;height:6px;background:var(--ink);border-radius:2px;}
h1{
  font-size:clamp(2.4rem,5.2vw,4.2rem);
  line-height:1.12;
  font-weight:800;
  letter-spacing:0;
  color:var(--ink);
  margin-bottom:20px;
}
.hero-lead{
  font-size:18px;
  line-height:1.85;
  color:var(--text);
  max-width:36em;
  margin-bottom:18px;
}
.hero-sub{
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
  max-width:36em;
  margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px;}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:0;
  border-top:1px solid var(--line);
  padding-top:22px;
}
.hero-facts li{
  padding:0 24px;
  border-left:1px solid var(--line);
}
.hero-facts li:first-child{padding-left:0;border-left:0;}
.hero-facts strong{
  display:block;font-family:"Inter",sans-serif;
  font-size:22px;font-weight:700;color:var(--ink);line-height:1.3;
}
.hero-facts span{font-size:13px;color:var(--muted);}
.hero-figure{
  border-radius:18px;overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  background:var(--card);
}
.hero-figure img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  transition:transform .42s var(--ease);
}
.hero-figure:hover img{transform:scale(1.03);}
.hero-figure figcaption{
  font-size:13px;color:var(--muted);
  padding:12px 16px;border-top:1px solid var(--line);
  background:var(--card);
}

/* ---------- Sections ---------- */
.section{padding:var(--sec-space) 0;}
.section--tight{padding:88px 0;}
.section--dark{background:var(--ink);color:var(--dark-text);}
.section--dark .section-title,.section--dark h2{color:var(--dark-text);}
.section--dark .section-desc{color:rgba(242,240,233,.7);}
.section-head{max-width:720px;margin-bottom:56px;}
.section-label{
  display:inline-block;font-family:"Inter",sans-serif;
  font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);margin-bottom:14px;
}
.section--dark .section-label{color:rgba(242,240,233,.55);}
h2{
  font-size:clamp(1.75rem,3vw,2.6rem);
  line-height:1.22;
  font-weight:700;
  letter-spacing:0;
  color:var(--ink);
  margin-bottom:16px;
}
.section-desc{font-size:16px;line-height:1.85;color:var(--muted);max-width:40em;}
h3{font-size:1.25rem;line-height:1.5;font-weight:700;color:var(--ink);}

/* ---------- Alternating media blocks ---------- */
.media-row{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:64px;
  align-items:center;
  padding:56px 0;
  border-top:1px solid var(--line);
}
.media-row:first-of-type{border-top:0;padding-top:0;}
.media-row--reverse .media-copy{order:2;}
.media-row--reverse .media-figure{order:1;}
.media-figure{
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--card);
  box-shadow:var(--shadow-1);
}
.media-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .42s var(--ease);}
.media-figure:hover img{transform:scale(1.03);}
.step-tag{
  font-family:"Inter",sans-serif;
  font-size:13px;font-weight:600;color:var(--ink);
  background:var(--lime);
  border-radius:6px;padding:4px 10px;display:inline-block;margin-bottom:16px;
}
.media-copy p{font-size:16px;line-height:1.85;color:var(--muted);margin-bottom:18px;}
.check-list{display:flex;flex-direction:column;gap:12px;}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  font-size:16px;line-height:1.75;color:var(--text);
}
.check-list li svg{flex:0 0 auto;margin-top:5px;color:var(--ink);}
.check-list li b{font-weight:700;color:var(--ink);}

/* ---------- Numbered steps ---------- */
.step-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;border-top:1px solid var(--line);}
.step-card{
  padding:40px 36px 40px 0;
  border-bottom:1px solid var(--line);
  display:flex;gap:24px;align-items:flex-start;
  transition:background-color .28s var(--ease);
}
.step-card:nth-child(odd){border-right:1px solid var(--line);padding-right:40px;}
.step-card:nth-child(even){padding-left:40px;}
.step-card:hover{background:rgba(228,225,216,.28);}
.step-num{
  font-family:"Inter",sans-serif;
  font-size:48px;font-weight:700;line-height:1;
  color:transparent;
  -webkit-text-stroke:1.5px var(--ink);
  flex:0 0 auto;
  transition:color .28s var(--ease);
}
.step-card:hover .step-num{color:var(--lime);-webkit-text-stroke:1.5px var(--ink);}
.step-card h3{margin-bottom:10px;}
.step-card p{font-size:15px;line-height:1.85;color:var(--muted);}

/* ---------- Problem cards (non-equal width) ---------- */
.problem-grid{
  display:grid;
  grid-template-columns:1.35fr 1fr;
  gap:24px;
}
.problem-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px;
  box-shadow:var(--shadow-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.problem-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--ink);}
.problem-card h3{margin-bottom:10px;font-size:1.1rem;}
.problem-card p{font-size:15px;line-height:1.85;color:var(--muted);}
.problem-badge{
  display:inline-block;
  font-size:12px;font-weight:600;
  color:var(--ink);
  background:var(--lime-soft);
  border:1px solid rgba(255,106,61,.35);
  border-radius:6px;
  padding:4px 10px;
  margin-bottom:14px;
}
.problem-card--wide{background:var(--card);}
.problem-card--wide .inner-split{display:grid;grid-template-columns:minmax(0,1fr) 200px;gap:24px;align-items:center;}
.problem-card--wide img{border-radius:12px;aspect-ratio:16/10;object-fit:cover;width:100%;border:1px solid var(--line);}

/* ---------- Quote strip ---------- */
.quote-strip{
  display:flex;align-items:center;gap:18px;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:22px 0;
  margin-top:56px;
}
.quote-strip svg{color:var(--ink);flex:0 0 auto;}
.quote-strip p{font-size:16px;color:var(--ink);}
.quote-strip span{font-size:13px;color:var(--muted);}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:26px 0;
  font-size:17px;font-weight:600;color:var(--ink);
  text-align:left;
  transition:color .24s var(--ease);
}
.faq-q:hover{color:var(--ink);}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 auto;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--lime);
  transition:transform .28s var(--ease),opacity .28s var(--ease);
}
.faq-icon::before{width:18px;height:2px;transform:translate(-50%,-50%);}
.faq-icon::after{width:2px;height:18px;transform:translate(-50%,-50%);}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(45deg);opacity:0;}
.faq-item.is-open .faq-icon::before{transform:translate(-50%,-50%) rotate(45deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .32s var(--ease);
}
.faq-a p{
  font-size:16px;line-height:1.8;color:var(--muted);
  padding:0 0 26px 8px;
  max-width:52em;
}

/* ---------- CTA ---------- */
.cta-block{
  background:var(--ink);
  color:var(--dark-text);
  border-radius:20px;
  padding:64px 56px;
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);
  gap:40px;
  align-items:center;
  position:relative;
  overflow:hidden;
}
.cta-block::after{
  content:"";
  position:absolute;right:-60px;top:-60px;
  width:240px;height:240px;border-radius:50%;
  background:rgba(200,242,75,.12);
}
.cta-block h2{color:var(--dark-text);margin-bottom:12px;}
.cta-block p{color:rgba(242,240,233,.75);font-size:16px;max-width:34em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:2;}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--ink);
  color:var(--dark-text);
  padding:72px 0 0;
  margin-top:var(--sec-space);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:52px;
  border-bottom:1px solid rgba(242,240,233,.14);
}
.footer-brand p{
  font-size:14px;line-height:1.9;
  color:rgba(242,240,233,.7);
  margin-top:18px;
  max-width:30em;
}
.footer-col h4{
  font-size:13px;font-weight:600;
  color:rgba(242,240,233,.55);
  margin-bottom:18px;
  letter-spacing:.02em;
}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col a{
  font-size:15px;color:var(--dark-text);
  display:inline-block;
  transition:color .24s var(--ease),transform .24s var(--ease);
}
.footer-col a:hover{color:var(--lime);transform:translateX(-3px);}
.footer-col li span{font-size:15px;color:rgba(242,240,233,.75);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  padding:24px 0 28px;
  font-size:13px;
  color:rgba(242,240,233,.6);
}
.footer-bottom a{color:rgba(242,240,233,.6);}
.footer-bottom a:hover{color:var(--lime);}

/* ---------- Floating CTA ---------- */
.float-bar{
  position:fixed;
  right:28px;
  bottom:32px;
  display:flex;
  align-items:center;
  gap:10px;
  z-index:70;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s var(--ease);
}
.float-bar.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.float-main{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--ink);color:var(--lime);
  border-radius:999px;
  padding:14px 22px;
  font-size:14px;font-weight:600;
  box-shadow:var(--shadow-2);
  transition:transform .24s var(--ease),background-color .24s var(--ease);
}
.float-main:hover{background:var(--ink-2);color:var(--lime);transform:translateY(-1px);}
.float-main svg{transition:transform .24s var(--ease);}
.float-main:hover svg{transform:translateX(2px);}
.float-top{
  display:none;
  align-items:center;justify-content:center;
  width:52px;height:52px;
  border-radius:50%;
  background:var(--card);color:var(--ink);
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
}

/* ---------- Reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .42s var(--ease),transform .42s var(--ease);}
[data-reveal].is-visible{opacity:1;transform:none;}
.stagger > *{transition-delay:0ms;}
.stagger > *:nth-child(2){transition-delay:60ms;}
.stagger > *:nth-child(3){transition-delay:120ms;}
.stagger > *:nth-child(4){transition-delay:180ms;}
.stagger > *:nth-child(5){transition-delay:240ms;}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  :root{--sec-space:104px;}
  .command-search{width:210px;}
  .main-nav{gap:20px;}
}
@media (max-width:1023px){
  :root{--sec-space:92px;}
  .main-nav,.command-search,.icon-shortcut{display:none;}
  .nav-toggle{display:inline-flex;}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:40px;}
  .media-row{grid-template-columns:minmax(0,1fr);gap:36px;padding:48px 0;}
  .media-row--reverse .media-copy{order:1;}
  .media-row--reverse .media-figure{order:2;}
  .problem-grid{grid-template-columns:minmax(0,1fr);}
  .problem-card--wide .inner-split{grid-template-columns:minmax(0,1fr);}
  .cta-block{grid-template-columns:minmax(0,1fr);padding:48px 36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .step-grid{grid-template-columns:minmax(0,1fr);}
  .step-card:nth-child(odd){border-right:0;padding-right:0;}
  .step-card:nth-child(even){padding-left:0;}
}
@media (max-width:639px){
  :root{--sec-space:72px;--nav-h:64px;--nav-h-shrink:60px;}
  body{font-size:16px;}
  .grid-container{padding-left:20px;padding-right:20px;}
  h1{font-size:clamp(2rem,8vw,2.6rem);}
  .page-hero{padding:44px 0 60px;}
  .page-hero .hero-watermark{font-size:200px;right:-30px;bottom:-50px;}
  .hero-facts li{padding:0 16px;}
  .hero-facts strong{font-size:19px;}
  .hero-actions .btn{width:100%;}
  .brand-text-b{display:none;}
  .step-card{padding:28px 0;gap:16px;}
  .step-num{font-size:36px;}
  .faq-q{font-size:16px;padding:22px 0;}
  .cta-block{padding:38px 24px;border-radius:16px;}
  .footer-grid{grid-template-columns:1fr;}
  .site-footer{padding-top:56px;padding-bottom:76px;}
  .float-bar{
    right:0;left:0;bottom:0;
    padding:8px 16px calc(8px + env(safe-area-inset-bottom));
    background:rgba(247,245,240,.96);
    border-top:1px solid var(--line);
    gap:10px;
  }
  .float-main{flex:1 1 auto;justify-content:center;height:44px;padding:0 18px;box-shadow:none;}
  .float-top{display:inline-flex;width:44px;height:44px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  [data-reveal]{transform:none !important;}
  .btn:hover,.problem-card:hover,.icon-shortcut:hover{transform:none !important;}
}

/* roulang page: category2 */
:root{
  --ink:#0D1412;
  --ink-2:#1B2624;
  --ink-3:#243230;
  --lime:#C8F24B;
  --lime-dim:rgba(200,242,75,.2);
  --orange:#FF6A3D;
  --bg:#F7F5F0;
  --card:#FFFFFF;
  --line:#E4E1D8;
  --muted:#6B7573;
  --text:#17201E;
  --on-dark:#F2F0E9;
  --on-dark-dim:rgba(242,240,233,.7);
  --r-card:14px;
  --r-img:16px;
  --r-input:10px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(13,20,18,.04);
  --sh-2:0 14px 32px -14px rgba(13,20,18,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --hd:76px;
  --pad:clamp(64px,9vw,132px);
  --font:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",-apple-system,sans-serif;
  --num:"Inter","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:17px;
  line-height:1.85;
  letter-spacing:0;
  padding-top:var(--hd);
  transition:padding-top .24s var(--ease);
  overflow-x:hidden;
}
html.is-scrolled body{padding-top:64px;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
a:hover{color:inherit;}
button{font-family:inherit;font-size:inherit;cursor:pointer;background:none;border:0;color:inherit;}
input{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px;}
::selection{background:var(--lime);color:var(--ink);}

/* ---------- 容器 ---------- */
.grid-container{
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
  width:100%;
}
.section{padding:var(--pad) 0;}
.section--tight{padding:calc(var(--pad) * .68) 0;}
.section-head{max-width:760px;margin-bottom:clamp(32px,4vw,56px);}
.section-head .eyebrow{
  font-family:var(--num);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
  display:block;
  margin-bottom:14px;
}
h1,h2,h3,h4{letter-spacing:0;}
h2{
  font-size:clamp(1.75rem,3vw,2.6rem);
  line-height:1.2;
  font-weight:700;
}
.section-head p{
  margin-top:14px;
  color:var(--muted);
  font-size:16px;
  max-width:660px;
}
.rule{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 24px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  line-height:1;
  border:1px solid transparent;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),background-color .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease);
  white-space:nowrap;
}
.btn .arrow{transition:transform .24s var(--ease);display:inline-block;}
.btn:hover .arrow{transform:translateX(2px);}
.btn-primary{background:var(--ink);color:var(--lime);}
.btn-primary:hover{background:#1d2a27;color:var(--lime);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--on-dark);transform:translateY(-1px);}
.btn-lime{background:var(--lime);color:var(--ink);}
.btn-lime:hover{background:#d5f96a;color:var(--ink);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-block{width:100%;justify-content:center;}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 10px;
  border-radius:6px;
  background:var(--lime-dim);
  color:var(--ink-2);
  font-size:12.5px;
  font-weight:600;
  line-height:1.4;
}
.badge--orange{background:rgba(255,106,61,.14);color:#B33F1C;}
.badge--line{background:transparent;border:1px solid var(--line);color:var(--muted);font-weight:500;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  height:var(--hd);
  background:rgba(247,245,240,.88);
  backdrop-filter:saturate(160%) blur(12px);
  -webkit-backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid transparent;
  transition:height .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease),background-color .28s var(--ease);
}
html.is-scrolled .site-header{
  height:64px;
  border-bottom-color:var(--line);
  box-shadow:0 1px 0 rgba(13,20,18,.05);
}
.nav-inner{
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  height:100%;
  display:flex;
  align-items:center;
  gap:22px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;
  border-radius:8px;
  background:var(--ink);
  color:var(--lime);
  display:grid;
  place-items:center;
  font-weight:800;
  font-size:17px;
  font-family:var(--num);
  position:relative;
  overflow:hidden;
}
.brand-mark::after{
  content:"";
  position:absolute;
  left:6px;right:6px;bottom:7px;
  height:2px;
  background:var(--lime);
  border-radius:2px;
}
.brand-text{display:flex;align-items:baseline;gap:6px;line-height:1;}
.brand-text .b1{font-size:16px;font-weight:800;letter-spacing:.01em;}
.brand-text .b2{font-size:12px;font-weight:600;color:var(--muted);letter-spacing:.02em;}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px;}
.main-nav a{
  position:relative;
  padding:8px 12px;
  font-size:14.5px;
  font-weight:500;
  color:#3C4A47;
  border-radius:8px;
  transition:color .24s var(--ease),background-color .24s var(--ease);
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s var(--ease);
  border-radius:2px;
}
.main-nav a:hover{color:var(--ink);background:rgba(13,20,18,.04);}
.main-nav a:hover::after,.main-nav a.is-active::after{transform:scaleX(1);}
.main-nav a.is-active{color:var(--ink);font-weight:700;}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.command-search{
  display:flex;
  align-items:center;
  gap:8px;
  height:38px;
  padding:0 10px 0 12px;
  border:1px solid var(--line);
  border-radius:var(--r-input);
  background:#fff;
  min-width:210px;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.command-search:focus-within{
  border-color:var(--lime);
  box-shadow:0 0 0 3px rgba(200,242,75,.35);
}
.command-search svg{flex-shrink:0;opacity:.6;}
.command-search input{
  border:0;outline:0;background:transparent;
  width:100%;
  font-size:14px;
  color:var(--text);
}
.command-search input::placeholder{color:#9AA3A1;}
.kbd{
  font-family:var(--num);
  font-size:11px;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:6px;
  padding:2px 6px;
  background:var(--bg);
  flex-shrink:0;
}
.icon-btn{
  width:38px;height:38px;
  border-radius:10px;
  border:1px solid var(--line);
  background:#fff;
  display:grid;place-items:center;
  transition:border-color .24s var(--ease),transform .24s var(--ease),color .24s var(--ease);
  color:var(--ink);
}
.icon-btn:hover{border-color:var(--ink);transform:translateY(-1px);}
.nav-toggle{display:none;}
.nav-cta{padding:11px 20px;font-size:14.5px;border-radius:var(--r-pill);}

/* 抽屉 */
.drawer{
  position:fixed;
  inset:0;
  z-index:200;
  background:var(--bg);
  transform:translateY(-8px);
  opacity:0;
  visibility:hidden;
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s;
  display:flex;
  flex-direction:column;
  padding:22px 20px calc(24px + env(safe-area-inset-bottom));
  overflow-y:auto;
}
.drawer.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
.drawer-links{display:flex;flex-direction:column;}
.drawer-links a{
  font-size:22px;
  font-weight:700;
  padding:18px 0;
  border-bottom:1px solid var(--line);
  transition:color .24s var(--ease),padding-left .24s var(--ease);
}
.drawer-links a:hover,.drawer-links a.is-active{color:var(--ink);padding-left:8px;}
.drawer-links a.is-active::before{content:"";display:inline-block;width:6px;height:6px;background:var(--lime);border-radius:50%;margin-right:10px;vertical-align:middle;}
.drawer-foot{margin-top:auto;padding-top:28px;display:flex;flex-direction:column;gap:12px;}
body.no-scroll{overflow:hidden;}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding:clamp(48px,7vw,90px) 0 clamp(56px,7vw,96px);
  overflow:hidden;
}
.hero::before{
  content:"九";
  position:absolute;
  right:-2%;
  top:-16%;
  font-size:clamp(240px,34vw,520px);
  font-weight:800;
  line-height:1;
  color:var(--ink);
  opacity:.05;
  pointer-events:none;
  user-select:none;
}
.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:clamp(32px,4vw,64px);
  align-items:center;
}
.crumbs{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  color:var(--muted);
  margin-bottom:22px;
  flex-wrap:wrap;
}
.crumbs a:hover{color:var(--ink);text-decoration:underline;}
.crumbs .sep{opacity:.55;}
.hero h1{
  font-size:clamp(2.1rem,4.4vw,3.5rem);
  line-height:1.14;
  font-weight:800;
  margin:16px 0 18px;
}
.hero-lead{
  font-size:17px;
  color:var(--muted);
  max-width:560px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}
.hero-stats{
  display:flex;
  flex-wrap:wrap;
  gap:0;
  margin-top:38px;
  border-top:1px solid var(--line);
  padding-top:20px;
}
.hero-stats div{
  padding:0 22px;
  border-left:1px solid var(--line);
}
.hero-stats div:first-child{padding-left:0;border-left:0;}
.hero-stats strong{
  display:block;
  font-family:var(--num);
  font-size:22px;
  font-weight:700;
  color:var(--ink);
  line-height:1.2;
}
.hero-stats span{font-size:13px;color:var(--muted);}
.hero-media{
  position:relative;
  border-radius:18px;
  overflow:hidden;
  aspect-ratio:16/10;
  box-shadow:var(--sh-1);
  border:1px solid var(--line);
}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media figcaption{
  position:absolute;
  left:16px;bottom:16px;
  background:rgba(13,20,18,.82);
  color:var(--on-dark);
  font-size:12.5px;
  padding:7px 12px;
  border-radius:8px;
  backdrop-filter:blur(4px);
}

/* ---------- 时间轴 ---------- */
.timeline-wrap{position:relative;}
.timeline{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:0;
  border-top:1px solid var(--line);
  margin-top:12px;
}
.tl-step{
  position:relative;
  padding:28px 22px 0 0;
  transition:background-color .3s var(--ease);
}
.tl-step::before{
  content:"";
  position:absolute;
  top:-5px;left:0;
  width:9px;height:9px;
  border-radius:50%;
  background:var(--ink);
  transition:background-color .3s var(--ease),transform .3s var(--ease);
}
.tl-step:hover::before{background:var(--lime);transform:scale(1.25);}
.tl-num{
  font-family:var(--num);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--muted);
  display:block;
  margin-bottom:10px;
}
.tl-step h3{font-size:1.05rem;font-weight:700;margin-bottom:8px;}
.tl-step p{font-size:14.5px;color:var(--muted);line-height:1.75;}

/* ---------- 场景卡（不等宽） ---------- */
.scene-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:24px;
  align-items:stretch;
}
.scene-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--ink);}
.scene-media{aspect-ratio:16/10;overflow:hidden;background:#EDEAE2;}
.scene-media img{width:100%;height:100%;object-fit:cover;transition:transform .42s var(--ease);}
.scene-card:hover .scene-media img{transform:scale(1.03);}
.scene-body{padding:24px 26px 28px;display:flex;flex-direction:column;gap:12px;flex:1;}
.scene-body h3{font-size:1.2rem;font-weight:700;}
.scene-body h3 span{display:block;font-size:12.5px;font-weight:600;color:var(--muted);letter-spacing:.1em;margin-bottom:8px;font-family:var(--num);}
.scene-body p{font-size:15px;color:var(--muted);}
.scene-body .tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto;padding-top:6px;}
.scene-card--lead .scene-media{aspect-ratio:16/9;}
.scene-card--lead .scene-body h3{font-size:1.5rem;}
.scene-card--lead .scene-body p{font-size:16px;}
.mini-grid{display:grid;grid-template-columns:5fr 7fr;gap:24px;margin-top:24px;}

/* ---------- 清单 ---------- */
.check-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 40px;margin-top:8px;}
.check-list li{
  display:flex;
  gap:12px;
  padding:18px 0;
  border-bottom:1px solid var(--line);
  font-size:15.5px;
  color:#28332F;
}
.check-list .ck{
  flex:0 0 20px;
  width:20px;height:20px;
  border-radius:6px;
  background:var(--lime);
  color:var(--ink);
  display:grid;place-items:center;
  font-size:12px;
  font-weight:800;
  margin-top:5px;
}

/* ---------- 深色证据区 ---------- */
.dark-band{
  background:var(--ink);
  color:var(--on-dark);
  padding:var(--pad) 0;
  position:relative;
  overflow:hidden;
}
.dark-band::after{
  content:"9";
  position:absolute;
  right:-1%;bottom:-24%;
  font-family:var(--num);
  font-size:clamp(200px,26vw,420px);
  font-weight:800;
  opacity:.05;
  line-height:1;
  pointer-events:none;
}
.dark-band h2{color:var(--on-dark);}
.dark-band .section-head p{color:var(--on-dark-dim);}
.stat-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  background:rgba(242,240,233,.16);
  border:1px solid rgba(242,240,233,.16);
  border-radius:var(--r-card);
  overflow:hidden;
  margin-bottom:48px;
}
.stat-cell{
  background:var(--ink-2);
  padding:30px 26px;
}
.stat-cell strong{
  display:block;
  font-family:var(--num);
  font-size:clamp(1.9rem,3vw,2.5rem);
  font-weight:700;
  color:var(--lime);
  line-height:1.1;
}
.stat-cell span{display:block;margin-top:8px;font-size:14px;color:var(--on-dark-dim);}
.quote-row{
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:28px;
  align-items:center;
}
.quote{
  border-left:4px solid var(--lime);
  padding-left:22px;
  font-size:17px;
  line-height:1.8;
  color:var(--on-dark);
}
.quote cite{display:block;margin-top:12px;font-size:13.5px;color:var(--on-dark-dim);font-style:normal;}
.dark-note{
  border:1px solid rgba(242,240,233,.2);
  border-radius:var(--r-card);
  padding:24px;
  font-size:14.5px;
  color:var(--on-dark-dim);
  line-height:1.8;
}
.dark-note strong{display:block;color:var(--on-dark);margin-bottom:8px;font-size:15px;}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  text-align:left;
  padding:22px 4px;
  font-size:17px;
  font-weight:600;
  color:var(--text);
  transition:color .24s var(--ease),background-color .24s var(--ease);
}
.faq-q:hover{color:var(--ink);background:rgba(228,225,216,.35);}
.faq-icon{
  position:relative;
  flex:0 0 18px;
  width:18px;height:18px;
  transition:transform .28s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--lime);
  border-radius:2px;
  transition:background-color .24s var(--ease);
}
.faq-icon::before{left:0;right:0;top:8px;height:2px;}
.faq-icon::after{top:0;bottom:0;left:8px;width:2px;}
.faq-item:hover .faq-icon::before,.faq-item:hover .faq-icon::after{background:var(--ink);}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows .32s var(--ease);
}
.faq-item.is-open .faq-a{grid-template-rows:1fr;}
.faq-a-inner{overflow:hidden;}
.faq-a-inner p{
  padding:0 0 24px 8px;
  font-size:16px;
  line-height:1.8;
  color:var(--muted);
  max-width:820px;
}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--lime);
  color:var(--ink);
  border-radius:24px;
  padding:clamp(36px,5vw,64px);
  display:grid;
  grid-template-columns:1.3fr .7fr;
  gap:32px;
  align-items:center;
}
.cta-band h2{font-size:clamp(1.6rem,2.8vw,2.3rem);}
.cta-band p{margin-top:12px;font-size:16px;color:rgba(13,20,18,.72);max-width:520px;}
.cta-actions{display:flex;flex-direction:column;gap:12px;align-items:flex-start;}
.cta-band .btn-ghost{border-color:var(--ink);}
.cta-band .btn-ghost:hover{background:var(--ink);color:var(--lime);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);
  color:var(--on-dark);
  padding:clamp(56px,7vw,88px) 0 0;
  margin-top:clamp(56px,7vw,110px);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px 32px;
}
.footer-brand .brand-mark{background:var(--lime);color:var(--ink);}
.footer-brand .brand-mark::after{background:var(--ink);}
.footer-brand .brand-text .b2{color:var(--on-dark-dim);}
.footer-brand p{margin-top:16px;font-size:14.5px;color:var(--on-dark-dim);max-width:320px;line-height:1.8;}
.footer-col h4{
  font-size:13px;
  letter-spacing:.14em;
  color:rgba(242,240,233,.55);
  font-weight:600;
  margin-bottom:18px;
  font-family:var(--num);
}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col a{
  font-size:15px;
  color:var(--on-dark);
  transition:color .24s var(--ease),transform .24s var(--ease);
  display:inline-block;
}
.footer-col a:hover{color:var(--lime);transform:translateX(-3px);}
.footer-col .plain{font-size:14.5px;color:var(--on-dark-dim);line-height:1.9;}
.footer-bottom{
  margin-top:52px;
  border-top:1px solid rgba(242,240,233,.16);
  padding:22px 0 calc(22px + env(safe-area-inset-bottom));
  display:flex;
  flex-wrap:wrap;
  gap:12px 24px;
  justify-content:space-between;
  font-size:13.5px;
  color:var(--on-dark-dim);
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;
  right:28px;
  bottom:32px;
  z-index:110;
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:var(--ink);
  color:var(--lime);
  padding:13px 22px;
  border-radius:var(--r-pill);
  font-size:14.5px;
  font-weight:600;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s,background-color .24s var(--ease);
  box-shadow:0 12px 28px -12px rgba(13,20,18,.5);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:#1d2a27;color:var(--lime);}
.float-cta .arrow{transition:transform .24s var(--ease);}
.float-cta:hover .arrow{transform:translateX(2px);}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1199px){
  .hero-grid{gap:36px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;}
  .footer-col:last-child{grid-column:span 3;}
}
@media screen and (max-width:1023px){
  .main-nav,.command-search,.icon-btn{display:none;}
  .nav-toggle{display:grid;}
  .nav-cta{display:none;}
  .hero-grid{grid-template-columns:1fr;}
  .hero::before{display:none;}
  .timeline{grid-template-columns:1fr;border-top:0;}
  .tl-step{
    border-top:1px solid var(--line);
    padding:22px 0 22px 26px;
  }
  .tl-step::before{top:30px;}
  .scene-grid,.mini-grid{grid-template-columns:1fr;}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .quote-row{grid-template-columns:1fr;}
  .cta-band{grid-template-columns:1fr;}
  .check-list{grid-template-columns:1fr;}
}
@media screen and (max-width:767px){
  :root{--pad:64px;}
  .grid-container,.nav-inner{padding-left:20px;padding-right:20px;}
  .hero-stats div{padding:0 16px;}
  .hero-stats strong{font-size:19px;}
  .stat-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-brand{grid-column:span 2;}
  .footer-col:last-child{grid-column:span 2;}
  .scene-body{padding:20px;}
}
@media screen and (max-width:639px){
  .float-cta{
    right:0;left:0;bottom:0;
    border-radius:0;
    height:56px;
    justify-content:center;
    padding:0 18px calc(env(safe-area-inset-bottom)) 18px;
    transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0);}
  .float-cta .top-link{display:inline-flex;}
  .site-footer{padding-bottom:64px;}
  .hero-actions .btn{width:100%;justify-content:center;}
  .hero-stats{gap:16px 0;}
  .crumbs{font-size:12.5px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{transform:none;transition:opacity .3s linear;}
  .scene-card:hover,.btn:hover,.icon-btn:hover{transform:none;}
  .main-nav a::after{transition:none;}
  *{animation-duration:.001ms !important;transition-duration:.15s !important;}
}

/* roulang page: category3 */
:root{
  --ink:#0D1412;
  --ink-2:#1B2624;
  --ink-3:#16211F;
  --lime:#C8F24B;
  --lime-soft:rgba(200,242,75,.22);
  --orange:#FF6A3D;
  --orange-soft:rgba(255,106,61,.14);
  --bg:#F7F5F0;
  --card:#FFFFFF;
  --line:#E4E1D8;
  --muted:#6B7573;
  --text:#17201E;
  --dark-text:#F2F0E9;
  --dark-muted:rgba(242,240,233,.7);
  --r-card:14px;
  --r-img:16px;
  --r-input:10px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(13,20,18,.04);
  --sh-2:0 14px 32px -14px rgba(13,20,18,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --sec-y:110px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.85;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.grid-container{max-width:1200px;padding-left:24px;padding-right:24px;margin-left:auto;margin-right:auto}
.section{padding:var(--sec-y) 0}
.section--tight{padding:72px 0}
.section-head{max-width:740px;margin-bottom:52px}
.section-head h2{font-size:clamp(1.75rem,3vw,2.6rem);font-weight:700;line-height:1.2;letter-spacing:.005em}
.section-head p{color:var(--muted);font-size:16px;margin-top:14px;max-width:640px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:18px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--lime)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  height:76px;
  background:rgba(247,245,240,.9);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:height .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease),background .28s var(--ease);
}
.site-header.is-scrolled{
  height:64px;
  border-bottom-color:var(--line);
  box-shadow:0 6px 18px -16px rgba(13,20,18,.5);
  background:rgba(247,245,240,.96);
}
.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:8px;background:var(--ink);
  display:flex;align-items:center;justify-content:center;
  color:var(--lime);font-weight:800;font-size:19px;line-height:1;
  position:relative;overflow:hidden;
}
.brand-mark::after{content:"";position:absolute;left:8px;right:8px;bottom:8px;height:2px;background:var(--lime);opacity:.85}
.brand-text{display:flex;align-items:baseline;gap:6px;white-space:nowrap}
.brand-text .b1{font-size:18px;font-weight:800;letter-spacing:.01em}
.brand-text .b2{font-size:12.5px;color:var(--muted);font-weight:500}
.main-nav{display:flex;align-items:center;gap:4px}
.main-nav a{
  position:relative;display:inline-block;padding:9px 12px;font-size:15px;color:var(--text);border-radius:8px;
  transition:color .24s var(--ease),background .24s var(--ease);
}
.main-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);
}
.main-nav a:hover{background:rgba(13,20,18,.04)}
.main-nav a:hover::after,.main-nav a.is-active::after{transform:scaleX(1)}
.main-nav a.is-active{font-weight:600}
.header-tools{display:flex;align-items:center;gap:12px;flex-shrink:0}
.command-search{
  display:flex;align-items:center;gap:8px;height:42px;padding:0 10px 0 12px;min-width:216px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-input);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.command-search:focus-within{border-color:var(--lime);box-shadow:0 0 0 3px var(--lime-soft)}
.command-search svg{flex-shrink:0}
.command-search input{
  border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--text);
  font-family:inherit;
}
.command-search input::placeholder{color:#9AA3A0}
.kbd{
  font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:6px;
  padding:1px 6px;line-height:1.6;background:#FAF9F5;white-space:nowrap;
}
.icon-btn{
  width:42px;height:42px;border-radius:var(--r-input);border:1px solid var(--line);background:#fff;
  display:flex;align-items:center;justify-content:center;color:var(--text);
  transition:border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.icon-btn:hover{border-color:var(--ink);transform:translateY(-1px);box-shadow:var(--sh-2)}
.menu-toggle{
  display:none;width:42px;height:42px;border-radius:var(--r-input);border:1px solid var(--line);
  background:#fff;align-items:center;justify-content:center;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink)}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:background .26s var(--ease),color .26s var(--ease),transform .26s var(--ease),box-shadow .26s var(--ease),border-color .26s var(--ease);
}
.btn .arw{transition:transform .26s var(--ease)}
.btn:hover .arw{transform:translateX(2px)}
.btn-primary{background:var(--ink);color:var(--lime)}
.btn-primary:hover{background:#1a2624;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--dark-text);transform:translateY(-1px)}
.btn-lime{background:var(--lime);color:var(--ink)}
.btn-lime:hover{background:#d3f76a;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.pill{border-radius:999px}

/* 抽屉 */
.drawer{
  position:fixed;inset:0;z-index:90;background:var(--bg);
  padding:24px 20px calc(28px + env(safe-area-inset-bottom));
  display:flex;flex-direction:column;
  transform:translateY(-100%);opacity:0;visibility:hidden;
  transition:transform .32s var(--ease),opacity .32s var(--ease),visibility .32s var(--ease);
  overflow-y:auto;
}
.drawer.is-open{transform:translateY(0);opacity:1;visibility:visible}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:36px}
.drawer-nav{display:flex;flex-direction:column;gap:6px;flex:1}
.drawer-nav a{
  font-size:22px;font-weight:700;padding:14px 4px;border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
}
.drawer-nav a.is-active{color:var(--ink)}
.drawer-nav a.is-active::after{content:"";width:8px;height:8px;border-radius:50%;background:var(--lime)}
.drawer-cta{margin-top:28px}
.close-btn{width:42px;height:42px;border-radius:var(--r-input);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:20px;line-height:1}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:78px 0 88px}
.hero-watermark{
  position:absolute;right:-4%;top:-14%;font-size:min(44vw,480px);font-weight:800;line-height:.8;
  color:var(--ink);opacity:.05;pointer-events:none;user-select:none;
}
.hero-inner{position:relative;z-index:2}
.hero-copy{max-width:620px}
.hero h1{
  font-size:clamp(2.1rem,4.4vw,3.5rem);
  font-weight:800;line-height:1.14;letter-spacing:.005em;
  margin:18px 0 18px;
}
.hero-sub{font-size:17px;color:var(--muted);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-media{
  border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#fff;
  box-shadow:var(--sh-1);
}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .42s var(--ease)}
.hero-media:hover img{transform:scale(1.03)}
.stats{
  display:flex;flex-wrap:wrap;margin-top:44px;border-top:1px solid var(--line);
}
.stats .stat{flex:1 1 150px;padding:18px 20px;border-right:1px solid var(--line)}
.stats .stat:last-child{border-right:0}
.stats .stat strong{display:block;font-family:"Inter",sans-serif;font-size:24px;font-weight:700;line-height:1.3}
.stats .stat span{font-size:13.5px;color:var(--muted)}

/* ---------- 问题分类 双栏卡片矩阵 ---------- */
.matrix{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.qcard{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-1);position:relative;
  transition:transform .26s var(--ease),border-color .26s var(--ease),box-shadow .26s var(--ease);
}
.qcard:hover{transform:translateY(-2px);border-color:var(--ink);box-shadow:var(--sh-2)}
.qcard .num{
  font-family:"Inter",sans-serif;font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.08em;
}
.qcard h3{font-size:1.25rem;font-weight:700;margin:10px 0 8px}
.qcard .card-title-link{position:relative;display:inline-block}
.qcard .card-title-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .26s var(--ease);
}
.qcard:hover .card-title-link::after{transform:scaleX(1)}
.qcard p{color:var(--muted);font-size:15.5px;margin-bottom:16px}
.tick-list li{
  display:flex;gap:10px;align-items:flex-start;font-size:15.5px;color:var(--text);padding:7px 0;
  border-top:1px solid var(--line);
}
.tick-list li:first-child{border-top:0}
.tick-list li::before{
  content:"";flex-shrink:0;width:14px;height:14px;margin-top:7px;border-radius:4px;
  background:var(--lime-soft);border:1px solid rgba(200,242,75,.9);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;
  background:var(--lime-soft);color:#26340b;border-radius:6px;padding:4px 10px;line-height:1.5;
}
.badge-orange{background:var(--orange-soft);color:#8a2f13}

/* ---------- 自查步骤 ---------- */
.steps-wrap{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0}
.step{padding:34px 26px;border-left:1px solid var(--line);transition:background .26s var(--ease)}
.step:first-child{border-left:0}
.step:hover{background:rgba(247,245,240,.9)}
.step .big{
  font-family:"Inter",sans-serif;font-size:44px;font-weight:800;line-height:1;
  color:transparent;-webkit-text-stroke:1.5px rgba(13,20,18,.35);
}
.step h3{font-size:1.05rem;font-weight:700;margin:16px 0 8px}
.step p{font-size:15px;color:var(--muted)}

/* ---------- FAQ 双列 ---------- */
.faq-columns{column-gap:48px}
.faq-list.accordion{
  border:0;background:transparent;margin:0;
}
.faq-list .accordion-item{
  border:0;border-top:1px solid var(--line);background:transparent;
}
.faq-list .accordion-item:first-child{border-top:0}
.faq-list .accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 0;border:0;font-size:17px;font-weight:600;color:var(--text);line-height:1.6;
  background:transparent;transition:color .24s var(--ease),padding-left .24s var(--ease);
}
.faq-list .accordion-title:hover{color:var(--ink);padding-left:8px}
.faq-list .accordion-title::before{content:none}
.acc-plus{
  position:relative;flex-shrink:0;width:16px;height:16px;
  transition:transform .28s var(--ease);
}
.acc-plus::before,.acc-plus::after{
  content:"";position:absolute;background:var(--ink);border-radius:2px;
}
.acc-plus::before{left:0;top:7px;width:16px;height:2px}
.acc-plus::after{left:7px;top:0;width:2px;height:16px}
.accordion-item.is-active .acc-plus{transform:rotate(45deg)}
.faq-list .accordion-content{
  display:none;padding:0 40px 22px 8px;color:var(--muted);font-size:16px;line-height:1.85;
  border:0;background:transparent;
}
.accordion-item.is-active > .accordion-content{display:block}
.faq-note{
  margin-top:26px;padding:18px 20px;border:1px dashed var(--line);border-radius:var(--r-card);
  font-size:14.5px;color:var(--muted);background:#fff;
}

/* ---------- 相关专题 ---------- */
.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.topic-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:transform .26s var(--ease),border-color .26s var(--ease),box-shadow .26s var(--ease);
}
.topic-card:hover{transform:translateY(-2px);border-color:var(--ink);box-shadow:var(--sh-2)}
.topic-card img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .42s var(--ease)}
.topic-card:hover img{transform:scale(1.03)}
.topic-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:10px;flex:1}
.topic-body h3{font-size:1.15rem;font-weight:700}
.topic-body p{font-size:15px;color:var(--muted);flex:1}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--ink)}
.link-arrow .arw{transition:transform .26s var(--ease)}
.topic-card:hover .link-arrow .arw{transform:translateX(3px)}

/* ---------- 深色 CTA ---------- */
.cta-band{
  background:var(--ink-2);color:var(--dark-text);border-radius:20px;
  padding:56px 48px;display:flex;align-items:center;justify-content:space-between;gap:40px;
  border:1px solid rgba(242,240,233,.12);
}
.cta-band h2{font-size:clamp(1.5rem,2.4vw,2.1rem);font-weight:700;line-height:1.25;color:#fff}
.cta-band p{color:var(--dark-muted);font-size:15.5px;margin-top:12px;max-width:520px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex-shrink:0}
.cta-band .btn-ghost{border-color:rgba(242,240,233,.5);color:var(--dark-text)}
.cta-band .btn-ghost:hover{background:var(--dark-text);color:var(--ink);border-color:var(--dark-text)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-2);color:var(--dark-text);margin-top:var(--sec-y);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:36px}
.footer-brand .fb-logo{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.footer-brand .fb-logo .brand-mark{background:#000;border:1px solid rgba(242,240,233,.16)}
.footer-brand .brand-text .b1{color:#fff}
.footer-brand .brand-text .b2{color:var(--dark-muted)}
.footer-brand p{color:var(--dark-muted);font-size:15px;max-width:320px}
.footer-quote{
  margin-top:20px;padding-left:14px;border-left:3px solid var(--lime);
  font-size:14.5px;color:var(--dark-muted);
}
.site-footer h4{font-size:13px;font-weight:600;color:rgba(242,240,233,.55);letter-spacing:.08em;margin-bottom:16px;text-transform:uppercase}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{
  font-size:15px;color:var(--dark-text);
  transition:color .24s var(--ease),transform .24s var(--ease);
  display:inline-block;
}
.footer-links a:hover{color:var(--lime);transform:translateX(-3px)}
.footer-meta{font-size:15px;color:var(--dark-muted);display:flex;flex-direction:column;gap:10px}
.footer-meta span strong{color:var(--dark-text);font-weight:600}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(242,240,233,.14);
  padding:22px 0 28px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13.5px;color:rgba(242,240,233,.6);
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:28px;bottom:32px;z-index:80;
  display:inline-flex;align-items:center;gap:8px;height:46px;padding:0 20px;border-radius:999px;
  background:var(--ink);color:var(--lime);font-size:15px;font-weight:600;
  box-shadow:0 12px 28px -14px rgba(13,20,18,.55);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease),background .24s var(--ease);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--ink-3)}
.float-cta .arw{transition:transform .26s var(--ease)}
.float-cta:hover .arw{transform:translateX(2px)}

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

/* ---------- 响应式 ---------- */
@media screen and (max-width:1200px){
  .command-search{min-width:180px}
}
@media screen and (max-width:1023px){
  .main-nav,.command-search,.icon-btn{display:none}
  .menu-toggle{display:flex}
  .hero{padding:56px 0 64px}
  .section{--sec-y:72px;padding:72px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media screen and (max-width:767px){
  .matrix{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .step{border-left:0;border-top:1px solid var(--line)}
  .step:nth-child(odd){border-right:1px solid var(--line)}
  .step:nth-child(-n+2){border-top:0}
  .topic-grid{grid-template-columns:1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px 26px}
  .faq-columns > .cell + .cell{margin-top:8px}
  .stats .stat{flex:1 1 50%;border-right:0;border-bottom:1px solid var(--line)}
  .stats .stat:nth-last-child(-n+2){border-bottom:0}
}
@media screen and (max-width:639px){
  body{font-size:16px}
  .grid-container{padding-left:20px;padding-right:20px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .float-cta{
    left:16px;right:16px;bottom:calc(12px + env(safe-area-inset-bottom));
    height:56px;border-radius:14px;justify-content:center;
  }
  .site-footer{padding-bottom:72px}
  .hero h1{font-size:clamp(1.9rem,8vw,2.4rem)}
  .brand-text .b2{display:none}
}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}