/* roulang page: index */
:root{
  --brand:#FF4A1C;
  --brand-dark:#E63E12;
  --brand-soft:rgba(255,74,28,.12);
  --teal:#12C2A0;
  --teal-soft:rgba(18,194,160,.12);
  --bg:#F5F3EF;
  --card:#FFFFFF;
  --dark:#111214;
  --dark-2:#17191C;
  --line:#E3E0D9;
  --line-dark:#26282C;
  --ink:#15171A;
  --ink-2:#5A5F66;
  --ink-3:#8A9099;
  --on-dark:#F5F3EF;
  --on-dark-2:#A8AEB6;
  --r-card:18px;
  --r-img:14px;
  --r-btn:10px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(17,18,20,.04);
  --shadow-2:0 12px 32px -14px rgba(17,18,20,.14);
  --ease:cubic-bezier(.2,.7,.2,1);
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --head-h:112px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(255,74,28,.3);outline-offset:2px;border-radius:6px}
.grid-container{max-width:1200px;margin:0 auto;padding-left:40px;padding-right:40px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.eyebrow{
  display:inline-block;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--ink-3);
}
.section{padding:104px 0}
.section--tight{padding:80px 0}
.section--dark{background:var(--dark);color:var(--on-dark)}
.section--dark .eyebrow{color:var(--on-dark-2)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:clamp(26px,3.4vw,42px);line-height:1.18;margin-top:12px}
.section-head p{margin-top:16px;color:var(--ink-2);font-size:15px;line-height:1.8}
.section--dark .section-head p{color:var(--on-dark-2)}
.reveal{opacity:0;transform:translateY(12px);transition:opacity .34s var(--ease),transform .34s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  transition:transform .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn--primary{background:var(--brand);color:#fff}
.btn--primary:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn--primary:active{transform:translateY(0)}
.btn--ghost{background:transparent;border:1.5px solid var(--ink);color:var(--ink)}
.btn--ghost:hover{background:var(--ink);color:var(--bg)}
.btn--ghost-light{background:transparent;border:1px solid #3A3E44;color:var(--on-dark)}
.btn--ghost-light:hover{background:#22252A;border-color:#4A4F56}
.btn--sm{height:42px;padding:0 20px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none}
.linkarrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:700;color:var(--ink);position:relative;padding-bottom:3px;
}
.linkarrow::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--brand);
  transition:width .26s var(--ease);
}
.linkarrow:hover::after{width:100%}
.linkarrow span.ar{transition:transform .22s var(--ease)}
.linkarrow:hover span.ar{transform:translateX(3px)}

/* ---------- 头部 ---------- */
.site-head{position:sticky;top:0;z-index:80;background:rgba(245,243,239,.96);backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:border-color .24s var(--ease)}
.site-head.is-stuck{border-bottom-color:var(--line)}
.brandbar{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.logo{display:flex;flex-direction:column;line-height:1.12;flex:0 0 auto}
.logo__main{font-size:18px;font-weight:900;letter-spacing:-.02em}
.logo__main em{font-style:normal;color:var(--brand)}
.logo__sub{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);margin-top:3px}
.brandactions{display:flex;align-items:center;gap:18px}
.searchtoggle{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--ink-2);padding:8px 12px;border-radius:var(--r-btn);border:1px solid transparent;transition:.2s var(--ease)}
.searchtoggle:hover{color:var(--ink);border-color:var(--line);background:#fff}
.searchtoggle svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.8}
.brand-cta{font-size:14px;font-weight:800;color:var(--brand);padding:8px 0;position:relative}
.brand-cta::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:1px;background:var(--brand);transform:scaleX(.4);transform-origin:left;transition:transform .24s var(--ease)}
.brand-cta:hover::after{transform:scaleX(1)}
.navtoggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:var(--r-btn);align-items:center;justify-content:center;background:#fff}
.navtoggle span{display:block;width:16px;height:1.5px;background:var(--ink);position:relative}
.navtoggle span::before,.navtoggle span::after{content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--ink)}
.navtoggle span::before{top:-5px}
.navtoggle span::after{top:5px}
.searchpane{display:none;border-top:1px solid var(--line);background:#fff}
.searchpane.is-open{display:block}
.searchpane form{display:flex;gap:12px;align-items:center;padding:14px 0}
.searchpane label{font-size:13px;color:var(--ink-3);flex:0 0 auto}
.searchpane input[type=search]{
  flex:1;height:48px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;color:var(--ink);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.searchpane input[type=search]:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-soft)}
.channelbar{border-top:1px solid var(--line);height:48px;display:flex;align-items:center;overflow-x:auto;scrollbar-width:none}
.channelbar::-webkit-scrollbar{display:none}
.channelbar__inner{display:flex;align-items:center;gap:30px;white-space:nowrap}
.channel-link{position:relative;font-size:15px;font-weight:600;color:var(--ink-2);padding:13px 0;transition:color .2s var(--ease)}
.channel-link::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease),background-color .24s var(--ease)}
.channel-link:hover::after{transform:scaleX(1);background:rgba(255,74,28,.4)}
.channel-link.is-active{color:var(--brand)}
.channel-link.is-active::after{transform:scaleX(1)}
.drawer{position:fixed;inset:0;z-index:90;background:var(--bg);transform:translateY(-100%);transition:transform .3s var(--ease);display:flex;flex-direction:column}
.drawer.is-open{transform:none}
.drawer__top{height:64px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
.drawer__close{width:42px;height:42px;border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;display:flex;align-items:center;justify-content:center;font-size:18px}
.drawer__body{padding:24px 0 60px;overflow-y:auto}
.drawer__label{font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin:18px 0 6px}
.drawer__link{display:block;padding:14px 0;border-bottom:1px solid var(--line);font-size:17px;font-weight:700}
.drawer__link.is-active{color:var(--brand)}
.drawer__actions{display:flex;flex-direction:column;gap:12px;margin-top:26px}

/* ---------- Hero ---------- */
.hero{position:relative;padding:88px 0 92px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(to right,rgba(21,23,26,.05) 1px,transparent 1px),linear-gradient(to bottom,rgba(21,23,26,.05) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:linear-gradient(to bottom,#000 0%,transparent 88%);
  mask-image:linear-gradient(to bottom,#000 0%,transparent 88%);
  opacity:.75;
}
.hero__grid{position:relative;display:flex;gap:56px;align-items:center}
.hero__copy{flex:1 1 58%;min-width:0}
.hero__media{flex:1 1 42%;min-width:0}
.hero h1{font-size:clamp(38px,5.4vw,66px);font-weight:900;line-height:1.06;letter-spacing:-.03em;margin-top:18px}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero__sub{margin-top:22px;font-size:18px;line-height:1.7;color:var(--ink-2);max-width:52ch}
.hero__points{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{font-size:13px;font-weight:600;padding:6px 14px;border-radius:var(--r-pill);border:1px solid var(--line);background:#fff;color:var(--ink-2)}
.chip--teal{background:var(--teal-soft);border-color:transparent;color:#0E9C80}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.figwrap{position:relative;padding-bottom:26px}
.figframe{border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden;background:#fff;aspect-ratio:16/10;box-shadow:var(--shadow-1)}
.figframe img{width:100%;height:100%;object-fit:cover;transition:transform .55s var(--ease)}
.figframe:hover img{transform:scale(1.03)}
.figcard{
  position:absolute;left:20px;right:20px;bottom:0;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:16px 18px;display:flex;align-items:center;gap:14px;box-shadow:var(--shadow-2)
}
.figcard__num{font-family:var(--mono);font-size:22px;font-weight:800;color:var(--brand)}
.figcard__text{font-size:13.5px;line-height:1.6;color:var(--ink-2)}
.figcard__text strong{display:block;color:var(--ink);font-size:14.5px}

/* ---------- 锚点导航 ---------- */
.anchornav{position:sticky;top:var(--head-h);z-index:60;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.anchornav__inner{display:flex;align-items:center;overflow-x:auto;scrollbar-width:none}
.anchornav__inner::-webkit-scrollbar{display:none}
.anchor-link{position:relative;flex:0 0 auto;padding:16px 0;margin-right:32px;font-size:14px;font-weight:700;color:var(--ink-2);white-space:nowrap;transition:color .2s var(--ease)}
.anchor-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease)}
.anchor-link:hover{color:var(--ink)}
.anchor-link.is-current{color:var(--brand)}
.anchor-link.is-current::after{transform:scaleX(1)}

/* ---------- 卖点 ---------- */
.feature-list{border-top:1px solid var(--line);margin-top:8px}
.feature-item{display:flex;gap:36px;padding:38px 0;border-bottom:1px solid var(--line);transition:transform .24s var(--ease)}
.feature-item:nth-child(even){padding-left:8%}
.feature-item:hover{transform:translateX(2px)}
.feature-num{flex:0 0 54px;font-family:var(--mono);font-size:14px;letter-spacing:.1em;color:var(--ink-3);padding-top:8px;transition:color .22s var(--ease)}
.feature-item:hover .feature-num{color:var(--brand)}
.feature-item h3{font-size:clamp(20px,2.2vw,25px);line-height:1.4}
.feature-item p{margin-top:12px;color:var(--ink-2);font-size:15.5px;line-height:1.85;max-width:70ch}

/* ---------- 演示 ---------- */
.demo-grid{display:flex;gap:56px;align-items:flex-start}
.demo-copy{flex:1 1 46%;min-width:0}
.demo-media{flex:1 1 54%;min-width:0}
.steps{position:relative;margin-top:8px;padding-left:26px}
.steps::before{content:"";position:absolute;left:5px;top:12px;bottom:12px;width:1px;background:var(--line)}
.step{position:relative;padding:0 0 30px 0}
.step:last-child{padding-bottom:0}
.step::before{content:"";position:absolute;left:-26px;top:9px;width:11px;height:11px;border-radius:50%;background:#fff;border:2px solid var(--brand)}
.step__idx{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--ink-3)}
.step h3{font-size:19px;margin-top:6px;line-height:1.45}
.step p{margin-top:8px;font-size:15px;line-height:1.8;color:var(--ink-2)}
.mediabox{border:1px solid var(--line);border-radius:var(--r-img);padding:12px;background:#fff;box-shadow:var(--shadow-1)}
.mediabox .inner{border-radius:10px;overflow:hidden;aspect-ratio:4/3}
.mediabox img{width:100%;height:100%;object-fit:cover;transition:transform .55s var(--ease)}
.mediabox:hover img{transform:scale(1.03)}
.mediabox figcaption{margin-top:12px;font-size:13px;color:var(--ink-3);text-align:center}

/* ---------- 证据 ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:34px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.metric__num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:clamp(28px,3.6vw,46px);font-weight:800;line-height:1.1;letter-spacing:-.02em}
.metric__num small{font-size:15px;font-weight:700;color:var(--ink-3);margin-left:4px}
.metric__label{margin-top:8px;font-size:13px;color:var(--ink-3)}
.railwrap{position:relative;margin-top:44px}
.railwrap::after{content:"";position:absolute;top:0;right:-1px;width:80px;height:100%;background:linear-gradient(to right,rgba(245,243,239,0),var(--bg));pointer-events:none}
.rail{display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 4px 16px;scrollbar-width:thin}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-thumb{background:var(--line);border-radius:99px}
.quotecard{
  position:relative;flex:0 0 min(400px,82%);scroll-snap-align:start;
  background:transparent;border:1px solid var(--line);border-radius:var(--r-img);
  padding:30px 26px 24px;
}
.quotecard::before{content:"";position:absolute;top:22px;left:26px;width:8px;height:8px;background:var(--brand)}
.quotecard blockquote{margin:0;padding-top:22px;font-size:15.5px;line-height:1.85;color:var(--ink)}
.quotecard footer{margin-top:20px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-3);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* ---------- 资讯列表 ---------- */
.listhead{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:40px}
.post-card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease)
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#D8D4CB}
.post-card__media{aspect-ratio:16/10;overflow:hidden;background:#EDEAE4}
.post-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .55s var(--ease)}
.post-card:hover .post-card__media img{transform:scale(1.03)}
.post-card__body{display:flex;flex-direction:column;gap:12px;padding:22px;flex:1}
.badge{align-self:flex-start;font-size:12px;font-weight:700;padding:4px 10px;border-radius:var(--r-pill);background:var(--teal-soft);color:#0E9C80}
.post-card__title{font-size:19px;font-weight:700;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card__title a:hover{color:var(--brand)}
.post-card__excerpt{font-size:14.5px;line-height:1.8;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-card__meta{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-family:var(--mono);font-size:12.5px;color:var(--ink-3)}
.empty-state{
  margin-top:40px;border:1px dashed #CFCAC0;border-radius:var(--r-card);
  padding:52px 32px;text-align:center;background:rgba(255,255,255,.6)
}
.empty-state p{color:var(--ink-2);font-size:15px}
.empty-state .btn{margin-top:22px}

/* ---------- 方案 ---------- */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;align-items:start;margin-top:44px}
.plan{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:32px 28px;transition:transform .24s var(--ease),box-shadow .24s var(--ease)}
.plan:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.plan--featured{border-top:3px solid var(--brand);margin-top:-8px}
.plan__name{font-size:22px;font-weight:800}
.plan__desc{margin-top:10px;font-size:14.5px;color:var(--ink-2);line-height:1.75}
.plan__list{margin:24px 0 28px;display:grid;gap:12px}
.plan__list li{display:flex;gap:10px;font-size:15px;color:var(--ink-2);line-height:1.7}
.plan__list li::before{content:"";flex:0 0 8px;width:8px;height:8px;margin-top:9px;background:var(--brand)}
.plan .btn{width:100%}
.plan__tag{position:absolute;top:22px;right:22px;font-size:12px;font-weight:700;color:var(--brand);border:1px solid var(--brand);border-radius:var(--r-pill);padding:2px 10px}
.plan{position:relative}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);margin-top:8px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-btn{width:100%;display:flex;align-items:center;gap:20px;padding:26px 0;text-align:left;font-size:19px;font-weight:700;line-height:1.5;transition:color .2s var(--ease)}
.faq-btn:hover{color:var(--brand)}
.faq-idx{flex:0 0 38px;font-family:var(--mono);font-size:13px;color:var(--ink-3);font-weight:500}
.faq-sign{margin-left:auto;position:relative;flex:0 0 16px;width:16px;height:16px}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;background:var(--ink);transition:transform .26s var(--ease),opacity .26s var(--ease),background-color .2s}
.faq-sign::before{top:50%;left:0;width:16px;height:1.5px;margin-top:-.75px}
.faq-sign::after{left:50%;top:0;width:1.5px;height:16px;margin-left:-.75px}
.faq-item.is-open .faq-sign::after{transform:rotate(90deg);opacity:0}
.faq-item.is-open .faq-sign::before{background:var(--brand)}
.faq-panel{max-height:0;overflow:hidden;transition:max-height .34s var(--ease)}
.faq-panel__in{padding:0 58px 26px 58px;color:var(--ink-2);font-size:15.5px;line-height:1.85;opacity:0;transition:opacity .26s var(--ease)}
.faq-item.is-open .faq-panel__in{opacity:1}

/* ---------- 底部 CTA ---------- */
.cta-band{position:relative;background:var(--dark);color:var(--on-dark);padding:72px 0;overflow:hidden}
.cta-band::after{content:"";position:absolute;inset:0;pointer-events:none;background:repeating-linear-gradient(135deg,rgba(255,255,255,.028) 0 1px,transparent 1px 14px)}
.cta-band__inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(24px,3vw,36px);line-height:1.2;max-width:26ch}
.cta-band p{margin-top:12px;color:var(--on-dark-2);font-size:15px;max-width:52ch}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--dark);color:var(--on-dark);padding-top:72px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:56px}
.foot-brand__name{font-size:20px;font-weight:900;line-height:1.3}
.foot-brand__name em{font-style:normal;color:var(--brand)}
.foot-brand p{margin-top:14px;font-size:14px;line-height:1.85;color:var(--on-dark-2);max-width:34ch}
.foot-title{font-size:13px;font-family:var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--on-dark-2);margin-bottom:16px}
.foot-links li+li{margin-top:10px}
.foot-links a{font-size:14.5px;color:#D5D8DC;transition:color .2s var(--ease)}
.foot-links a:hover{color:var(--brand)}
.foot-contact li{font-size:14.5px;color:#D5D8DC;line-height:1.9}
.foot-contact .k{display:block;font-size:12.5px;color:var(--on-dark-2)}
.foot-bar{border-top:1px solid var(--line-dark);padding:22px 0 30px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--on-dark-2)}
.foot-bar a{color:var(--on-dark-2);border-bottom:1px solid var(--line-dark)}
.foot-bar a:hover{color:var(--brand);border-color:var(--brand)}
.foot-acc{display:none}

/* ---------- 浮动 CTA ---------- */
.floatcta{position:fixed;right:32px;bottom:32px;z-index:70;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s}
.floatcta.is-on{opacity:1;visibility:visible;transform:none}
.floatcta__btn{
  display:inline-flex;align-items:center;gap:10px;height:52px;padding:0 24px;border-radius:var(--r-pill);
  background:var(--brand);color:#fff;font-size:15px;font-weight:800;box-shadow:0 14px 30px -14px rgba(255,74,28,.7);
  transition:background-color .2s var(--ease),transform .2s var(--ease)
}
.floatcta__btn:hover{background:var(--brand-dark);transform:translateY(-1px)}
.floatcta__btn svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .grid-container{padding-left:28px;padding-right:28px}
  .section{padding:80px 0}
  .hero{padding:64px 0 72px}
  .hero__grid{flex-direction:column;gap:40px;align-items:stretch}
  .hero__media{flex:1 1 auto}
  .demo-grid{flex-direction:column;gap:40px}
  .posts{grid-template-columns:repeat(2,1fr)}
  .plans{grid-template-columns:1fr;gap:20px}
  .plan--featured{margin-top:0}
  .metrics{grid-template-columns:repeat(2,1fr);gap:28px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .brandactions .brand-cta,.brandactions .searchtoggle{display:none}
  .navtoggle{display:inline-flex}
  :root{--head-h:112px}
}
@media (max-width:640px){
  .grid-container{padding-left:20px;padding-right:20px}
  .section{padding:60px 0}
  .hero h1{font-size:38px}
  .hero__sub{font-size:16px}
  .hero__cta .btn{flex:1 1 100%}
  .feature-item{flex-direction:column;gap:12px;padding:26px 0}
  .feature-item:nth-child(even){padding-left:0}
  .feature-num{padding-top:0}
  .posts{grid-template-columns:1fr}
  .faq-btn{font-size:17px;gap:12px}
  .faq-idx{flex:0 0 28px}
  .faq-panel__in{padding:0 0 22px 40px}
  .metrics{grid-template-columns:1fr 1fr;gap:22px}
  .cta-band{padding:56px 0}
  .cta-band__actions .btn{flex:1 1 100%}
  .foot-grid{grid-template-columns:1fr 1fr;gap:26px;padding-bottom:36px}
  .foot-brand{grid-column:1 / -1}
  .foot-acc{display:block;border-top:1px solid var(--line-dark)}
  .foot-acc details{border-bottom:1px solid var(--line-dark)}
  .foot-acc summary{padding:16px 0;font-size:15px;font-weight:700;list-style:none;cursor:pointer;display:flex;justify-content:space-between}
  .foot-acc summary::-webkit-details-marker{display:none}
  .foot-acc summary::after{content:"+";color:var(--on-dark-2)}
  .foot-acc details[open] summary::after{content:"×"}
  .foot-acc .foot-links{padding-bottom:18px}
  .floatcta{right:0;left:0;bottom:0;transform:translateY(110%)}
  .floatcta__btn{width:100%;height:56px;border-radius:0;justify-content:center;padding-bottom:env(safe-area-inset-bottom)}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --brand:#FF4A1C;
  --brand-dark:#E63E12;
  --brand-soft:rgba(255,74,28,.12);
  --accent:#12C2A0;
  --accent-soft:rgba(18,194,160,.12);
  --bg:#F5F3EF;
  --card:#FFFFFF;
  --dark:#111214;
  --dark-line:#26282C;
  --ink:#15171A;
  --ink-2:#5A5F66;
  --ink-3:#8A9099;
  --line:#E3E0D9;
  --light-text:#F5F3EF;
  --light-text-2:#A8AEB6;
  --r-card:18px;
  --r-img:14px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(17,18,20,.04);
  --sh-2:0 12px 32px -14px rgba(17,18,20,.14);
  --ease:cubic-bezier(.2,.7,.2,1);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font);font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand);}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,textarea,select{font-family:inherit;font-size:16px;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{text-wrap:balance;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}
::selection{background:var(--brand);color:#fff;}
:focus-visible{outline:3px solid rgba(255,74,28,.28);outline-offset:2px;border-radius:6px;}

.grid-container{max-width:1200px;margin:0 auto;padding-left:40px;padding-right:40px;width:100%;}
.grid-container.full{padding-left:0;padding-right:0;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1);}
.btn--primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);}
.btn--primary:active{transform:translateY(0);}
.btn--ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--ink);}
.btn--ghost:hover{background:var(--ink);color:var(--light-text);}
.btn--sm{height:40px;padding:0 18px;font-size:14px;}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;}
.btn--dark-ghost{color:var(--light-text);box-shadow:inset 0 0 0 1px #3A3E44;}
.btn--dark-ghost:hover{background:#20232A;color:#fff;}
.linkarrow{
  display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--ink);
  position:relative;padding-bottom:2px;
}
.linkarrow::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--brand);transition:width .24s var(--ease);}
.linkarrow i{transition:transform .24s var(--ease);font-size:13px;}
.linkarrow:hover{color:var(--brand);}
.linkarrow:hover::after{width:100%;}
.linkarrow:hover i{transform:translateX(3px);}

/* ---------- badges / tags ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;line-height:1.6;letter-spacing:.02em;font-weight:700;
  padding:4px 10px;border-radius:var(--r-pill);
  background:var(--accent-soft);color:#0E9E82;
}
.badge--line{background:transparent;box-shadow:inset 0 0 0 1px var(--line);color:var(--ink-2);}
.badge--dark{background:transparent;box-shadow:inset 0 0 0 1px #3A3E44;color:var(--light-text-2);}

/* ---------- header ---------- */
.site-head{position:sticky;top:0;z-index:60;background:rgba(245,243,239,.94);backdrop-filter:blur(8px);}
.brandbar{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px;}
.logo{display:flex;flex-direction:column;line-height:1.15;}
.logo__main{font-size:18px;font-weight:900;letter-spacing:-.02em;color:var(--ink);}
.logo__main em{font-style:normal;color:var(--brand);}
.logo__sub{font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);margin-top:3px;}
.brandactions{display:flex;align-items:center;gap:18px;}
.searchtoggle{
  display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--ink-2);
  transition:color .18s var(--ease);
}
.searchtoggle svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;}
.searchtoggle:hover{color:var(--brand);}
.brand-cta{font-size:14px;font-weight:800;color:var(--brand);position:relative;padding-bottom:2px;}
.brand-cta::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;background:currentColor;opacity:.35;transition:opacity .18s var(--ease);}
.brand-cta:hover{color:var(--brand-dark);}
.brand-cta:hover::after{opacity:.9;}
.navtoggle{display:none;width:40px;height:40px;border-radius:var(--r-btn);box-shadow:inset 0 0 0 1px var(--line);position:relative;}
.navtoggle span,.navtoggle::before,.navtoggle::after{content:"";position:absolute;left:11px;width:18px;height:2px;background:var(--ink);transition:transform .24s var(--ease),opacity .24s var(--ease);}
.navtoggle span{top:19px;}
.navtoggle::before{top:13px;}
.navtoggle::after{top:25px;}
.navtoggle[aria-expanded="true"]::before{transform:translateY(6px) rotate(45deg);}
.navtoggle[aria-expanded="true"]::after{transform:translateY(-6px) rotate(-45deg);}
.navtoggle[aria-expanded="true"] span{opacity:0;}

.searchpane{display:none;border-top:1px solid var(--line);background:#fff;}
.searchpane.is-open{display:block;}
.searchpane form{display:flex;gap:12px;align-items:flex-end;padding:18px 0;}
.searchpane label{display:block;font-size:13px;font-weight:700;color:var(--ink-2);margin-bottom:8px;}
.searchpane input[type="search"]{
  flex:1;height:48px;border-radius:var(--r-btn);border:1px solid var(--line);background:#fff;
  padding:0 14px;color:var(--ink);transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.searchpane input[type="search"]:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(255,74,28,.12);}

.channelbar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg);}
.channelbar__inner{display:flex;align-items:center;gap:28px;height:48px;overflow-x:auto;scrollbar-width:none;}
.channelbar__inner::-webkit-scrollbar{display:none;}
.channel-link{
  position:relative;flex:0 0 auto;font-size:14px;font-weight:700;color:var(--ink-2);
  height:48px;display:inline-flex;align-items:center;transition:color .18s var(--ease);
}
.channel-link::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);}
.channel-link:hover{color:var(--ink);}
.channel-link:hover::after{transform:scaleX(1);background:rgba(255,74,28,.4);}
.channel-link.is-active{color:var(--brand);}
.channel-link.is-active::after{transform:scaleX(1);background:var(--brand);}

/* ---------- drawer ---------- */
.navdrawer{
  position:fixed;inset:0;z-index:90;background:var(--dark);color:var(--light-text);
  padding:24px 22px 40px;display:flex;flex-direction:column;gap:8px;
  transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .26s var(--ease),transform .26s var(--ease);
}
.navdrawer.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
.navdrawer__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
.navdrawer .logo__main{color:var(--light-text);font-size:17px;}
.navdrawer__close{width:42px;height:42px;border-radius:var(--r-btn);box-shadow:inset 0 0 0 1px #2A2D31;font-size:20px;color:var(--light-text);}
.navdrawer__nav{display:flex;flex-direction:column;}
.navdrawer__nav a{padding:15px 0;border-bottom:1px solid var(--dark-line);font-size:16px;font-weight:700;color:var(--light-text);}
.navdrawer__nav a.is-active{color:var(--brand);}
.navdrawer .btn{margin-top:26px;}

/* ---------- page head / breadcrumb ---------- */
.page-head{padding:56px 0 8px;background:
  radial-gradient(1200px 400px at 12% -20%,rgba(255,74,28,.07),transparent 60%),
  var(--bg);}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:26px;}
.breadcrumb a{color:var(--ink-2);font-weight:600;}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--ink-3);}
.breadcrumb .current{max-width:340px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--ink-3);}

.article-hero{max-width:820px;}
.article-hero h1{
  font-size:clamp(30px,4vw,52px);font-weight:900;line-height:1.16;letter-spacing:-.025em;
  margin:18px 0 20px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;font-size:13px;color:var(--ink-3);}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--line);display:inline-block;}
.meta-divider{height:1px;background:var(--line);margin:40px 0 0;}

/* ---------- article layout ---------- */
.article-section{padding:56px 0 40px;}
.article-layout{display:grid;grid-template-columns:200px minmax(0,1fr);gap:48px;align-items:start;}
.toc{position:sticky;top:132px;display:none;}
.toc.is-ready{display:block;}
.toc h2{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);font-weight:800;margin-bottom:14px;font-family:var(--mono);}
.toc a{display:block;font-size:13.5px;line-height:1.6;color:var(--ink-2);padding:7px 0 7px 14px;border-left:2px solid var(--line);transition:color .18s var(--ease),border-color .18s var(--ease);}
.toc a:hover{color:var(--ink);}
.toc a.is-current{color:var(--brand);border-left-color:var(--brand);font-weight:700;}

.article-main{max-width:720px;width:100%;}
.article-body{font-size:17px;line-height:1.9;color:#1F2226;}
.article-body > * + *{margin-top:20px;}
.article-body p{font-size:17px;line-height:1.9;color:#1F2226;}
.article-body h2{
  position:relative;font-size:clamp(22px,2.6vw,28px);font-weight:800;line-height:1.3;letter-spacing:-.02em;
  margin:48px 0 18px;padding-left:16px;color:var(--ink);scroll-margin-top:140px;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;width:4px;height:1em;background:var(--brand);border-radius:2px;}
.article-body h3{font-size:20px;font-weight:700;line-height:1.45;margin:34px 0 12px;color:var(--ink);}
.article-body ul,.article-body ol{margin:20px 0;padding-left:22px;}
.article-body ul li,.article-body ol li{position:relative;margin:10px 0;padding-left:6px;line-height:1.85;}
.article-body ul li::before{content:"";position:absolute;left:-16px;top:.72em;width:6px;height:6px;background:var(--brand);border-radius:1px;}
.article-body ol{list-style:decimal;padding-left:24px;}
.article-body blockquote{
  margin:28px 0;padding:18px 22px;background:#FBFAF7;border-left:3px solid var(--brand);
  border-radius:0 var(--r-img) var(--r-img) 0;color:var(--ink-2);font-size:16px;
}
.article-body blockquote p{margin:0;font-size:16px;color:var(--ink-2);}
.article-body img{border-radius:var(--r-img);margin:28px auto;box-shadow:inset 0 0 0 1px rgba(17,18,20,.06);}
.article-body figure{margin:28px 0;}
.article-body figcaption{text-align:center;font-size:13px;color:var(--ink-3);margin-top:12px;}
.article-body code{
  font-family:var(--mono);font-size:.92em;background:#EFEDE7;padding:2px 6px;border-radius:6px;color:#2B2F35;
}
.article-body pre{
  background:#15171A;color:#EDEAE4;padding:18px 20px;border-radius:var(--r-img);
  overflow-x:auto;font-family:var(--mono);font-size:14px;line-height:1.75;
}
.article-body pre code{background:none;color:inherit;padding:0;}
.article-body a{color:var(--brand);font-weight:600;text-decoration:underline;text-underline-offset:3px;}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left;}
.article-body th{border-bottom:2px solid var(--brand);font-weight:800;background:#FBFAF7;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0;}

.article-foot{margin-top:52px;padding-top:28px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;}
.article-foot .note{font-size:13px;color:var(--ink-3);}

/* ---------- empty state ---------- */
.empty-state{
  border:1px dashed #CFCAC0;border-radius:var(--r-card);background:#FCFBF8;
  padding:52px 32px;text-align:center;
}
.empty-state h2{font-size:22px;font-weight:800;margin-bottom:10px;}
.empty-state p{font-size:15px;color:var(--ink-2);margin-bottom:24px;}

/* ---------- sections ---------- */
.section{padding:104px 0;}
.section--tight{padding:72px 0;}
.section--alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px;}
.sec-head .eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);display:block;margin-bottom:14px;}
.sec-head h2{font-size:clamp(26px,3.4vw,42px);font-weight:800;line-height:1.18;letter-spacing:-.02em;}
.sec-head p{font-size:15px;color:var(--ink-2);margin-top:14px;max-width:560px;}

/* ---------- cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;}
.card{
  display:flex;flex-direction:column;background:var(--card);border-radius:var(--r-card);
  box-shadow:var(--sh-1);border:1px solid var(--line);overflow:hidden;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.card__media{position:relative;overflow:hidden;aspect-ratio:16/10;border-bottom:1px solid var(--line);}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.card:hover .card__media img{transform:scale(1.03);}
.card__body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.card__title{font-size:19px;font-weight:700;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card__desc{font-size:14.5px;color:var(--ink-2);line-height:1.8;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.card__meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-3);padding-top:14px;border-top:1px solid var(--line);}
.card__meta i{transition:transform .24s var(--ease);}
.card:hover .card__meta i{transform:translateX(3px);color:var(--brand);}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--dark);color:var(--light-text);position:relative;overflow:hidden;
  padding:72px 0;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(135deg,rgba(255,255,255,.035) 0 1px,transparent 1px 14px);
  pointer-events:none;
}
.cta-band__inner{position:relative;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;}
.cta-band h2{font-size:clamp(24px,3vw,36px);font-weight:800;letter-spacing:-.02em;line-height:1.24;}
.cta-band p{color:var(--light-text-2);font-size:15px;margin-top:14px;max-width:520px;}

/* ---------- 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:flex-start;gap:18px;text-align:left;
  padding:24px 4px;font-size:17px;font-weight:700;color:var(--ink);line-height:1.6;
  transition:color .18s var(--ease);
}
.faq-q:hover{color:var(--brand);}
.faq-q .num{font-family:var(--mono);font-size:13px;color:var(--ink-3);padding-top:4px;min-width:26px;}
.faq-q .sign{margin-left:auto;font-size:20px;font-weight:400;color:var(--ink-3);transition:transform .24s var(--ease),color .18s var(--ease);line-height:1;}
.faq-item.is-open .faq-q .sign{transform:rotate(45deg);color:var(--brand);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease);}
.faq-a__inner{padding:0 4px 26px 44px;font-size:15.5px;color:var(--ink-2);line-height:1.85;}
.faq-item.is-open .faq-a{max-height:340px;}

/* ---------- footer ---------- */
.site-foot{background:var(--dark);color:var(--light-text);padding:72px 0 0;}
.foot-grid{row-gap:44px;}
.foot-brand .logo__main{color:var(--light-text);font-size:19px;display:block;}
.foot-brand .logo__main em{color:var(--brand);font-style:normal;}
.foot-brand p{color:var(--light-text-2);font-size:14.5px;line-height:1.85;margin-top:16px;max-width:300px;}
.foot-title{font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-family:var(--mono);color:var(--light-text-2);font-weight:700;margin-bottom:18px;}
.foot-links li{margin-bottom:12px;}
.foot-links a,.foot-links span{font-size:14.5px;color:#D6D2CB;transition:color .18s var(--ease);}
.foot-links a:hover{color:var(--brand);}
.foot-bottom{
  margin-top:56px;padding:24px 0;border-top:1px solid var(--dark-line);
  display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--light-text-2);
}
.foot-bottom a{color:#D6D2CB;}
.foot-bottom a:hover{color:var(--brand);}
.foot-note{
  display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center;justify-content:space-between;
  padding:16px 0 28px;font-size:12px;color:#7C8189;
}

/* ---------- float cta ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  height:52px;padding:0 24px;border-radius:var(--r-pill);
  background:var(--brand);color:#fff;font-size:15px;font-weight:800;
  box-shadow:0 14px 30px -12px rgba(255,74,28,.6);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease),background .18s var(--ease);
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta:hover{background:var(--brand-dark);color:#fff;}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease);}
.reveal.is-in{opacity:1;transform:translateY(0);}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .grid-container{padding-left:28px;padding-right:28px;}
  .section{padding:80px 0;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;}
  .toc{display:none !important;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
}
@media (max-width:768px){
  .brandactions .searchtoggle,.brandactions .brand-cta{display:none;}
  .navtoggle{display:block;}
  .breadcrumb .current{max-width:190px;}
  .article-hero h1{font-size:clamp(26px,7vw,36px);}
  .article-body,.article-body p{font-size:16.5px;}
  .cta-band{padding:56px 0;}
  .site-foot{padding-top:56px;}
}
@media (max-width:640px){
  .grid-container{padding-left:20px;padding-right:20px;}
  .section{padding:60px 0;}
  .sec-head{margin-bottom:28px;}
  .card-grid{grid-template-columns:minmax(0,1fr);gap:20px;}
  .faq-q{font-size:16px;gap:12px;}
  .faq-a__inner{padding-left:4px;}
  .float-cta{
    right:0;left:0;bottom:0;width:100%;height:56px;border-radius:0;
    justify-content:center;padding:0 20px calc(0px + env(safe-area-inset-bottom));
    padding-bottom:env(safe-area-inset-bottom);
  }
  .searchpane form{flex-direction:column;align-items:stretch;}
  .article-foot{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
:root{
  --brand:#FF4A1C;
  --brand-dark:#E63E12;
  --brand-soft:rgba(255,74,28,.10);
  --brand-ring:rgba(255,74,28,.28);
  --accent:#12C2A0;
  --accent-soft:rgba(18,194,160,.12);
  --bg:#F5F3EF;
  --card:#FFFFFF;
  --dark:#111214;
  --dark-line:#26282C;
  --text:#15171A;
  --text-2:#5A5F66;
  --text-3:#8A9099;
  --line:#E3E0D9;
  --line-dark:#2A2D31;
  --r-card:18px;
  --r-img:14px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(17,18,20,.04);
  --sh-2:0 12px 32px -14px rgba(17,18,20,.14);
  --sh-3:0 18px 40px -16px rgba(17,18,20,.20);
  --ease:cubic-bezier(.2,.7,.2,1);
  --font-cn:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",Arial,sans-serif;
  --font-mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand)}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;padding:0}
ul,ol{list-style:none}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
::selection{background:var(--brand-soft)}
:focus-visible{outline:3px solid var(--brand-ring);outline-offset:2px;border-radius:4px}

/* ---------- 容器 ---------- */
.grid-container{max-width:1200px;padding-left:40px;padding-right:40px;margin:0 auto;width:100%}
@media screen and (max-width:1024px){.grid-container{padding-left:28px;padding-right:28px}}
@media screen and (max-width:640px){.grid-container{padding-left:20px;padding-right:20px}}

/* ---------- 头部 ---------- */
.site-head{position:relative;background:var(--bg);z-index:50}
.brandbar{
  display:flex;align-items:center;justify-content:space-between;
  min-height:64px;gap:16px;
}
.logo{display:flex;flex-direction:column;line-height:1.1;gap:2px;flex-shrink:0}
.logo__main{font-size:19px;font-weight:900;letter-spacing:-.02em;color:var(--text)}
.logo__main em{font-style:normal;color:var(--brand)}
.logo:hover .logo__main{color:var(--text)}
.logo__sub{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--text-3);font-family:var(--font-mono)}
.brandactions{display:flex;align-items:center;gap:8px}
.searchtoggle{
  display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 14px;border-radius:var(--r-btn);
  font-size:14px;color:var(--text-2);border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.searchtoggle svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round}
.searchtoggle:hover{background:#fff;border-color:var(--line);color:var(--text);box-shadow:var(--sh-1)}
.brand-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 18px;border-radius:var(--r-btn);
  font-size:14px;font-weight:700;color:var(--brand);
  border:1px solid rgba(255,74,28,.28);
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.brand-cta:hover{background:var(--brand);color:#fff;border-color:var(--brand);transform:translateY(-1px)}
.navtoggle{display:none;width:42px;height:42px;border-radius:var(--r-btn);position:relative;border:1px solid var(--line);background:#fff}
.navtoggle span,.navtoggle span::before,.navtoggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--text);border-radius:2px;
  transform:translateX(-50%);transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.navtoggle span{top:50%;margin-top:-1px}
.navtoggle span::before,.navtoggle span::after{content:"";left:0;transform:none}
.navtoggle span::before{top:-6px}
.navtoggle span::after{top:6px}
.site-head.is-open .navtoggle span{background:transparent}
.site-head.is-open .navtoggle span::before{top:0;transform:rotate(45deg);background:var(--brand)}
.site-head.is-open .navtoggle span::after{top:0;transform:rotate(-45deg);background:var(--brand)}

.searchpane{display:none;border-top:1px solid var(--line);background:#fff;box-shadow:var(--sh-1)}
.searchpane.is-open{display:block;animation:paneIn .28s var(--ease)}
@keyframes paneIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
.searchpane form{display:flex;flex-wrap:wrap;align-items:flex-end;gap:12px;padding:20px 0}
.searchpane label{flex:1 1 220px;font-size:13px;color:var(--text-2);display:block}
.searchpane input{
  width:100%;height:48px;margin-top:6px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.searchpane input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-soft)}

.channelbar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg)}
.channelbar__inner{display:flex;align-items:center;gap:30px;height:48px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.channelbar__inner::-webkit-scrollbar{display:none}
.channel-link{
  position:relative;flex:0 0 auto;display:inline-flex;align-items:center;height:48px;
  font-size:15px;font-weight:600;color:var(--text-2);white-space:nowrap;
  transition:color .2s var(--ease);
}
.channel-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:transparent;
  transition:background .2s var(--ease);
}
.channel-link:hover{color:var(--text)}
.channel-link:hover::after{background:rgba(255,74,28,.4)}
.channel-link.is-active{color:var(--brand)}
.channel-link.is-active::after{background:var(--brand)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;line-height:1;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn--primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:translateY(0)}
.btn--ghost{background:transparent;border:1.5px solid var(--text);color:var(--text)}
.btn--ghost:hover{background:var(--text);color:var(--bg)}
.btn--sm{height:42px;padding:0 20px;font-size:14px}
.btn--onDark{border:1px solid #3A3E44;color:var(--bg);background:transparent}
.btn--onDark:hover{background:var(--bg);color:var(--dark);border-color:var(--bg)}
.linkarrow{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:700;color:var(--text);padding-bottom:2px;
}
.linkarrow::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--brand);
  transition:width .28s var(--ease);
}
.linkarrow span.arrow{transition:transform .24s var(--ease);color:var(--brand)}
.linkarrow:hover{color:var(--brand)}
.linkarrow:hover::after{width:100%}
.linkarrow:hover span.arrow{transform:translateX(3px)}

/* ---------- 标签 / 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;line-height:1;padding:5px 11px;border-radius:var(--r-pill);
  background:var(--accent-soft);color:#0E9B80;font-weight:700;letter-spacing:.02em;
}
.badge--soft{background:var(--brand-soft);color:var(--brand)}
.badge--outline{background:transparent;border:1px solid var(--line);color:var(--text-2)}
.eyebrow{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--text-3);margin-bottom:14px;
}

/* ---------- 首屏 ---------- */
.page-hero{
  position:relative;padding:72px 0 84px;background-color:var(--bg);
  background-image:linear-gradient(rgba(21,23,26,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(21,23,26,.035) 1px,transparent 1px);
  background-size:56px 56px;
  border-bottom:1px solid var(--line);
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:28px}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--brand)}
.crumb-current{color:var(--text);font-weight:600}
.page-hero h1{
  font-size:clamp(32px,4.4vw,52px);font-weight:900;line-height:1.12;letter-spacing:-.03em;
  max-width:15em;
}
.page-hero h1 em{font-style:normal;color:var(--brand)}
.lede{font-size:18px;color:var(--text-2);margin-top:20px;max-width:30em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-media{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--sh-2);background:#fff;
}
.hero-media img{width:100%;height:300px;object-fit:cover;transition:transform .5s var(--ease)}
.hero-media:hover img{transform:scale(1.03)}
.hero-media .mini-card{
  position:absolute;left:16px;right:16px;bottom:16px;
  background:#fff;border-radius:12px;padding:14px 16px;
  box-shadow:var(--sh-2);border:1px solid var(--line);
}
.hero-media .mini-card strong{display:block;font-size:14px;font-weight:800}
.hero-media .mini-card span{font-size:12.5px;color:var(--text-2);line-height:1.6;display:block;margin-top:2px}

/* ---------- 板块 ---------- */
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--light{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:720px;margin-bottom:48px}
.sec-head h2{font-size:clamp(26px,3.2vw,40px);font-weight:800;line-height:1.18;letter-spacing:-.02em}
.sec-head p{color:var(--text-2);margin-top:16px;font-size:16px}
.sec-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}

/* ---------- 通道卡（2×2 不对称） ---------- */
.channel-grid{margin-top:-8px}
.chcard{
  position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:32px;height:100%;display:flex;flex-direction:column;
  box-shadow:var(--sh-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.chcard:hover{transform:translateY(-2px);box-shadow:var(--sh-3);border-color:#D6D2C8}
.chcard__top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}
.chcard__idx{font-family:var(--font-mono);font-size:13px;color:var(--text-3);letter-spacing:.1em}
.chcard:hover .chcard__idx{color:var(--brand)}
.chcard h3{font-size:21px;font-weight:800;line-height:1.4;letter-spacing:-.01em}
.chcard p{color:var(--text-2);font-size:15px;line-height:1.8;margin-top:12px}
.chcard__list{margin-top:20px;padding-top:18px;border-top:1px solid var(--line);display:grid;gap:2px}
.chcard__list li{display:flex;gap:10px;font-size:14.5px;color:var(--text-2);line-height:1.75}
.chcard__list li::before{
  content:"";flex:0 0 auto;width:6px;height:6px;margin-top:11px;background:var(--brand);border-radius:1px;
}
.chcard__foot{margin-top:auto;padding-top:22px}
.chcard--wide{background:linear-gradient(180deg,#fff 0%,#FCFBF8 100%)}
.chcard--dark{background:var(--dark);border-color:var(--dark-line);color:#F5F3EF}
.chcard--dark h3{color:#F5F3EF}
.chcard--dark p,.chcard--dark .chcard__list li{color:#A8AEB6}
.chcard--dark .chcard__idx{color:#6E747C}
.chcard--dark:hover{border-color:#3A3E44}
.chcard--dark .chcard__list{border-top-color:var(--dark-line)}
.chcard--dark .linkarrow{color:#F5F3EF}
.chcard--dark .linkarrow:hover{color:var(--brand)}
.thumbsplit{display:flex;gap:24px;align-items:flex-start}
.thumbsplit__img{flex:0 0 128px;border-radius:12px;overflow:hidden;border:1px solid var(--line)}
.thumbsplit__img img{width:100%;height:128px;object-fit:cover;transition:transform .5s var(--ease)}
.thumbsplit:hover .thumbsplit__img img{transform:scale(1.03)}

/* ---------- 三步流程条 ---------- */
.steps{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);
}
.step{padding:34px 32px;position:relative;border-right:1px solid var(--line)}
.step:last-child{border-right:0}
.step__num{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--brand);font-weight:700}
.step h3{font-size:19px;font-weight:800;margin-top:14px;line-height:1.45}
.step p{font-size:14.5px;color:var(--text-2);margin-top:10px;line-height:1.8}
.step__meta{
  display:inline-flex;align-items:center;gap:8px;margin-top:18px;
  font-size:12.5px;color:var(--text-3);font-family:var(--font-mono);
}
.step__meta::before{content:"";width:18px;height:1px;background:var(--line);display:block}
.stepline{
  margin-top:22px;height:2px;background:var(--line);border-radius:2px;position:relative;overflow:hidden;
}
.stepline::after{content:"";position:absolute;left:0;top:0;height:100%;width:0;background:var(--brand);transition:width 1.2s var(--ease)}
.stepline.is-run::after{width:100%}

/* ---------- 精简 FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  display:flex;align-items:center;gap:20px;width:100%;text-align:left;
  padding:26px 0;font-size:17px;font-weight:700;line-height:1.5;
  transition:color .2s var(--ease);
}
.faq-idx{font-family:var(--font-mono);font-size:13px;color:var(--text-3);flex:0 0 auto;transition:color .2s var(--ease)}
.faq-q:hover{color:var(--brand)}
.faq-q:hover .faq-idx{color:var(--brand)}
.faq-mark{
  margin-left:auto;flex:0 0 auto;position:relative;width:16px;height:16px;
}
.faq-mark::before,.faq-mark::after{
  content:"";position:absolute;background:var(--text-2);border-radius:2px;
  transition:transform .28s var(--ease),background .28s var(--ease);
}
.faq-mark::before{left:0;top:7px;width:16px;height:2px}
.faq-mark::after{top:0;left:7px;width:2px;height:16px}
.faq-item.is-open .faq-mark::after{transform:rotate(90deg);opacity:0}
.faq-item.is-open .faq-mark::before{background:var(--brand)}
.faq-item.is-open .faq-q{color:var(--brand)}
.faq-a{overflow:hidden;height:0;transition:height .3s var(--ease)}
.faq-a__inner{padding:0 0 26px 46px;color:var(--text-2);font-size:15.5px;line-height:1.85;opacity:0;transition:opacity .3s var(--ease)}
.faq-item.is-open .faq-a__inner{opacity:1}

/* ---------- 联系入口 ---------- */
.helpbox{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:32px;box-shadow:var(--sh-1);height:100%;
}
.helpbox h3{font-size:19px;font-weight:800}
.helpbox p{color:var(--text-2);font-size:15px;margin-top:12px}
.helpbox ul{margin-top:18px;display:grid;gap:12px}
.helpbox li{display:flex;gap:10px;font-size:14.5px;color:var(--text-2)}
.helpbox li::before{content:"";flex:0 0 auto;width:6px;height:6px;margin-top:10px;background:var(--accent);border-radius:50%}
.helpbox .btn{margin-top:24px}

/* ---------- 深色 CTA 带 ---------- */
.cta-band{
  background:var(--dark);color:#F5F3EF;position:relative;overflow:hidden;
  padding:72px 0;
  background-image:repeating-linear-gradient(135deg,rgba(255,255,255,.035) 0 1px,transparent 1px 9px);
}
.cta-band__inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.25;letter-spacing:-.02em;max-width:20em}
.cta-band p{color:#A8AEB6;font-size:15.5px;margin-top:14px;max-width:34em}
.cta-band .actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--dark);color:#F5F3EF;padding:72px 0 0}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand .logo__main{color:#F5F3EF;font-size:18px}
.foot-brand .logo__main em{color:var(--brand)}
.foot-brand p{color:#A8AEB6;font-size:14.5px;margin-top:16px;line-height:1.8;max-width:26em}
.foot-col h4{font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:#8A9099;margin-bottom:18px}
.foot-col ul{display:grid;gap:12px}
.foot-col a{font-size:14.5px;color:#C9CED4;transition:color .2s var(--ease)}
.foot-col a:hover{color:var(--brand)}
.foot-note{font-size:14px;color:#A8AEB6;line-height:1.85}
.foot-bottom{
  margin-top:56px;border-top:1px solid var(--dark-line);padding:24px 0 32px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:#8A9099;
}
.foot-bottom .mono{color:#8A9099}
.foot-bottom a{color:#C9CED4}
.foot-bottom a:hover{color:var(--brand)}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:32px;bottom:32px;z-index:80;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 24px;border-radius:var(--r-pill);
  background:var(--brand);color:#fff;font-weight:700;font-size:15px;
  box-shadow:0 14px 30px -12px rgba(255,74,28,.6);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease),background .2s var(--ease);
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px)}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1024px){
  .page-hero{padding:56px 0 64px}
  .section{padding:80px 0}
  .section--tight{padding:60px 0}
  .steps{grid-template-columns:1fr}
  .step{border-right:0;border-bottom:1px solid var(--line)}
  .step:last-child{border-bottom:0}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media screen and (max-width:899px){
  .navtoggle{display:block}
  .searchtoggle span{display:none}
  .channelbar{display:none}
  .site-head.is-open .channelbar{
    display:block;position:absolute;left:0;right:0;top:64px;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh-2);z-index:60;
  }
  .site-head.is-open .channelbar__inner{
    flex-direction:column;align-items:stretch;height:auto;overflow:visible;gap:0;padding:6px 0 14px;
  }
  .site-head.is-open .channel-link{height:auto;padding:15px 0;border-bottom:1px solid var(--line);font-size:15.5px}
  .site-head.is-open .channel-link:last-child{border-bottom:0}
  .site-head.is-open .channel-link::after{display:none}
}
@media screen and (max-width:640px){
  body{font-size:15.5px}
  .page-hero{padding:40px 0 48px}
  .page-hero h1{font-size:clamp(28px,8.4vw,38px)}
  .lede{font-size:16px;margin-top:16px}
  .hero-actions{margin-top:26px}
  .hero-actions .btn{flex:1 1 auto}
  .hero-media img{height:220px}
  .section{padding:58px 0}
  .section--tight{padding:48px 0}
  .sec-head{margin-bottom:32px}
  .sec-head--row{flex-direction:column;align-items:flex-start;gap:16px}
  .chcard{padding:24px}
  .thumbsplit{flex-direction:column}
  .thumbsplit__img{flex:0 0 auto;width:100%}
  .thumbsplit__img img{height:160px}
  .step{padding:26px 22px}
  .faq-q{font-size:16px;gap:14px;padding:22px 0}
  .faq-a__inner{padding-left:0;font-size:15px}
  .cta-band{padding:56px 0}
  .cta-band__inner{flex-direction:column;align-items:flex-start;gap:24px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:10px}
  .float-cta{
    left:0;right:0;bottom:0;width:100%;height:56px;border-radius:0;
    padding-bottom:env(safe-area-inset-bottom);
    box-shadow:0 -8px 24px -12px rgba(17,18,20,.35);
  }
  .float-cta.is-visible{transform:none}
  .site-foot{padding-bottom:64px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --brand:#FF4A1C;
  --brand-dark:#E63E12;
  --brand-soft:rgba(255,74,28,.10);
  --accent:#12C2A0;
  --accent-soft:rgba(18,194,160,.12);
  --bg:#F5F3EF;
  --surface:#FFFFFF;
  --ink:#15171A;
  --ink-2:#5A5F66;
  --ink-3:#8A9099;
  --line:#E3E0D9;
  --dark:#111214;
  --dark-line:#26282C;
  --dark-ink:#F5F3EF;
  --dark-ink-2:#A8AEB6;
  --r-card:18px;
  --r-img:14px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(17,18,20,.04);
  --sh-2:0 12px 32px -14px rgba(17,18,20,.14);
  --sh-3:0 18px 42px -16px rgba(17,18,20,.20);
  --sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(255,74,28,.28);outline-offset:2px;border-radius:var(--r-btn);}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
.grid-container{max-width:1200px!important;padding-left:40px!important;padding-right:40px!important;margin-left:auto;margin-right:auto;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* ---------- 按钮体系 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;line-height:1;
  transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1);}
.btn--primary:hover{background:var(--brand-dark);transform:translateY(-1px);color:#fff;}
.btn--primary:active{transform:translateY(0);}
.btn--ghost{background:transparent;border:1.5px solid var(--ink);color:var(--ink);}
.btn--ghost:hover{background:var(--ink);color:var(--bg);}
.btn--dark{background:transparent;border:1px solid #3A3E44;color:var(--dark-ink);}
.btn--dark:hover{border-color:var(--dark-ink);transform:translateY(-1px);}
.btn--sm{height:40px;padding:0 18px;font-size:14px;}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none!important;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:15px;position:relative;color:var(--ink);
}
.link-arrow i{transition:transform .2s var(--ease);font-size:12px;}
.link-arrow::after{
  content:"";position:absolute;left:0;bottom:-4px;height:1px;width:0;background:var(--brand);
  transition:width .28s var(--ease);
}
.link-arrow:hover{color:var(--brand);}
.link-arrow:hover i{transform:translateX(3px);}
.link-arrow:hover::after{width:100%;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.02em;
  padding:4px 10px;border-radius:var(--r-pill);
  background:var(--accent-soft);color:#0B8C74;
}
.badge--brand{background:var(--brand-soft);color:var(--brand-dark);}
.badge--line{background:transparent;border:1px solid var(--line);color:var(--ink-2);}
.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-3);
}

/* ---------- 头部导航 ---------- */
.site-head{
  position:sticky;top:0;z-index:60;
  background:rgba(245,243,239,.94);
  backdrop-filter:saturate(150%) blur(8px);
  border-bottom:1px solid var(--line);
}
.brandbar{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px;}
.logo{display:flex;flex-direction:column;justify-content:center;line-height:1.15;}
.logo__main{font-size:19px;font-weight:900;letter-spacing:-.02em;}
.logo__main em{font-style:normal;color:var(--brand);}
.logo__sub{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);}
.brandactions{display:flex;align-items:center;gap:14px;}
.searchtoggle{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--ink-2);
  padding:8px 12px;border-radius:var(--r-pill);border:1px solid var(--line);background:var(--surface);
  transition:color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.searchtoggle svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;}
.searchtoggle:hover{color:var(--ink);border-color:var(--ink-3);box-shadow:var(--sh-1);}
.brand-cta{font-size:14px;font-weight:800;color:var(--brand);border-bottom:2px solid transparent;padding-bottom:2px;transition:border-color .2s var(--ease);}
.brand-cta:hover{border-color:var(--brand);}
.navtoggle{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-btn);background:var(--surface);position:relative;}
.navtoggle span,.navtoggle span::before,.navtoggle span::after{content:"";position:absolute;left:11px;width:18px;height:2px;background:var(--ink);transition:transform .24s var(--ease),opacity .2s var(--ease);}
.navtoggle span{top:19px;}
.navtoggle span::before{top:-6px;left:0;}
.navtoggle span::after{top:6px;left:0;}
.navtoggle[aria-expanded="true"] span{background:transparent;}
.navtoggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg);}
.navtoggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg);}

.searchpane{display:none;border-top:1px solid var(--line);background:var(--surface);padding:18px 0;}
.searchpane.is-open{display:block;animation:fadeDown .28s var(--ease);}
@keyframes fadeDown{from{opacity:0;transform:translateY(-8px);}to{opacity:1;transform:none;}}
.searchpane form{display:flex;align-items:flex-end;gap:14px;flex-wrap:wrap;}
.searchpane label{display:block;font-size:13px;font-weight:600;color:var(--ink-2);margin-bottom:8px;width:100%;}
.searchpane input[type="search"]{
  flex:1 1 320px;height:48px;padding:0 16px;font-size:15px;
  border:1px solid var(--line);border-radius:var(--r-btn);background:var(--bg);color:var(--ink);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease);
}
.searchpane input[type="search"]:focus{outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(255,74,28,.12);}

.channelbar{border-top:1px solid var(--line);background:var(--surface);}
.channelbar__inner{display:flex;align-items:center;gap:28px;height:48px;overflow-x:auto;scrollbar-width:none;}
.channelbar__inner::-webkit-scrollbar{display:none;}
.channel-link{
  position:relative;font-size:15px;font-weight:600;color:var(--ink-2);
  padding:6px 0;white-space:nowrap;
}
.channel-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:transparent;
  transition:background-color .2s var(--ease);
}
.channel-link:hover{color:var(--ink);}
.channel-link:hover::after{background:rgba(255,74,28,.4);}
.channel-link.is-active{color:var(--brand);}
.channel-link.is-active::after{background:var(--brand);}

/* ---------- 通用板块 ---------- */
.section{padding:104px 0;}
.section--tight{padding:72px 0;}
.section__head{max-width:720px;margin-bottom:40px;}
.section__head h2{font-size:clamp(26px,3.4vw,42px);font-weight:800;line-height:1.18;letter-spacing:-.02em;margin-top:10px;}
.section__head p{color:var(--ink-2);font-size:16px;margin-top:14px;}
.rule{height:1px;background:var(--line);border:0;}

/* ---------- 分类页 Hero ---------- */
.cat-hero{padding:64px 0 56px;border-bottom:1px solid var(--line);position:relative;overflow:hidden;}
.cat-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.04;
  background-image:linear-gradient(to right,#15171A 1px,transparent 1px),linear-gradient(to bottom,#15171A 1px,transparent 1px);
  background-size:64px 64px;
}
.cat-hero__inner{position:relative;display:grid;grid-template-columns:1.35fr 1fr;gap:56px;align-items:end;}
.cat-hero h1{font-size:clamp(30px,4.4vw,54px);font-weight:900;line-height:1.1;letter-spacing:-.03em;margin-top:16px;}
.cat-hero h1 span{color:var(--brand);}
.cat-hero__lead{margin-top:20px;font-size:17px;color:var(--ink-2);max-width:560px;}
.cat-hero__actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px;}
.cat-hero__figure{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-2);}
.cat-hero__figure img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s var(--ease);}
.cat-hero__figure:hover img{transform:scale(1.03);}

/* ---------- 数据条 ---------- */
.statbar{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.statbar__item{padding:26px 24px;border-right:1px solid var(--line);}
.statbar__item:last-child{border-right:0;}
.statbar__num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:clamp(26px,3vw,36px);font-weight:700;letter-spacing:-.02em;color:var(--ink);}
.statbar__num em{font-style:normal;color:var(--brand);font-size:.6em;margin-left:2px;}
.statbar__label{font-size:13px;color:var(--ink-3);margin-top:6px;letter-spacing:.02em;}

/* ---------- 指南布局：目录 + 时间轴 ---------- */
.guide-wrap{display:grid;grid-template-columns:250px 1fr;gap:56px;align-items:start;}
.toc{position:sticky;top:132px;}
.toc__title{font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);padding-bottom:12px;border-bottom:1px solid var(--line);}
.toc__list{margin-top:14px;}
.toc__list a{
  display:flex;gap:12px;align-items:baseline;
  padding:11px 0;font-size:15px;font-weight:600;color:var(--ink-2);
  border-bottom:1px solid transparent;
}
.toc__list a .idx{font-family:var(--mono);font-size:12px;color:var(--ink-3);transition:color .18s var(--ease);}
.toc__list a:hover{color:var(--ink);}
.toc__list a.is-current{color:var(--brand);}
.toc__list a.is-current .idx{color:var(--brand);}
.toc__note{margin-top:26px;padding:18px;border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface);box-shadow:var(--sh-1);}
.toc__note p{font-size:14px;color:var(--ink-2);line-height:1.75;}
.toc__note .btn{margin-top:14px;}

.timeline{position:relative;padding-left:38px;}
.timeline::before{content:"";position:absolute;left:11px;top:8px;bottom:8px;width:1px;background:var(--line);}
.step{position:relative;padding-bottom:52px;}
.step:last-child{padding-bottom:0;}
.step::before{
  content:"";position:absolute;left:-33px;top:8px;width:11px;height:11px;border-radius:50%;
  background:var(--surface);border:2px solid var(--line);transition:border-color .24s var(--ease),background-color .24s var(--ease);
}
.step:hover::before{border-color:var(--brand);background:var(--brand);}
.step__num{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--ink-3);}
.step h3{font-size:22px;font-weight:700;line-height:1.4;margin-top:8px;}
.step p{margin-top:12px;color:var(--ink-2);max-width:660px;}
.step__tip{
  margin-top:16px;display:flex;gap:12px;align-items:flex-start;
  padding:14px 18px;border-left:3px solid var(--accent);background:var(--accent-soft);
  border-radius:0 var(--r-btn) var(--r-btn) 0;font-size:14px;color:#0B7A66;line-height:1.75;
}
.step__tip i{margin-top:4px;font-size:13px;}
.step__media{margin-top:18px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);max-width:560px;}
.step__media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s var(--ease);}
.step__media:hover img{transform:scale(1.03);}
.step__media figcaption{font-size:12px;color:var(--ink-3);padding:10px 14px;background:var(--surface);border-top:1px solid var(--line);}

/* ---------- 准备清单 ---------- */
.checklist{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.checkcard{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-1);transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.checkcard:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.checkcard h3{font-size:19px;font-weight:700;margin-top:14px;}
.checkcard p{font-size:15px;color:var(--ink-2);margin-top:10px;line-height:1.8;}
.checkcard ul{margin-top:16px;border-top:1px solid var(--line);padding-top:14px;}
.checkcard li{display:flex;gap:10px;font-size:14px;color:var(--ink-2);padding:5px 0;}
.checkcard li::before{content:"";width:6px;height:6px;margin-top:9px;background:var(--brand);flex:0 0 6px;}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);}
.faq__item{border-bottom:1px solid var(--line);}
.faq__q{
  width:100%;display:flex;align-items:center;gap:18px;text-align:left;
  padding:24px 0;font-size:17px;font-weight:700;color:var(--ink);
  transition:color .2s var(--ease);
}
.faq__q:hover{color:var(--brand);}
.faq__q .idx{font-family:var(--mono);font-size:12px;color:var(--ink-3);flex:0 0 auto;}
.faq__q .txt{flex:1;}
.faq__sign{position:relative;width:16px;height:16px;flex:0 0 16px;}
.faq__sign::before,.faq__sign::after{content:"";position:absolute;background:var(--ink-3);transition:transform .28s var(--ease),background-color .2s var(--ease);}
.faq__sign::before{left:0;top:7px;width:16px;height:2px;}
.faq__sign::after{left:7px;top:0;width:2px;height:16px;}
.faq__q[aria-expanded="true"] .faq__sign::after{transform:rotate(90deg);opacity:0;}
.faq__q[aria-expanded="true"] .faq__sign::before{background:var(--brand);}
.faq__a{max-height:0;overflow:hidden;transition:max-height .34s var(--ease);}
.faq__a-inner{padding:0 0 26px 34px;font-size:15px;color:var(--ink-2);max-width:780px;animation:fadeUp .34s var(--ease);}
.faq__item.is-open .faq__a{max-height:420px;}

/* ---------- 深色 CTA 带 ---------- */
.cta-band{background:var(--dark);color:var(--dark-ink);position:relative;overflow:hidden;}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:repeating-linear-gradient(135deg,rgba(255,255,255,.028) 0 1px,transparent 1px 12px);
}
.cta-band__inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:40px;padding:72px 0;}
.cta-band h2{font-size:clamp(24px,3vw,36px);font-weight:800;line-height:1.2;letter-spacing:-.02em;}
.cta-band p{color:var(--dark-ink-2);font-size:15px;margin-top:12px;max-width:520px;}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--dark);color:var(--dark-ink);}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding:72px 0 48px;}
.foot-brand__main{font-size:18px;font-weight:900;letter-spacing:-.02em;}
.foot-brand__main em{font-style:normal;color:var(--brand);}
.foot-brand__sub{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:#6E747C;margin-top:8px;}
.foot-brand p{font-size:14px;color:var(--dark-ink-2);margin-top:16px;line-height:1.8;max-width:300px;}
.foot-col h4{font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:#8E949C;margin-bottom:16px;}
.foot-col a,.foot-col span{display:block;font-size:14px;color:var(--dark-ink-2);padding:6px 0;}
.foot-col a:hover{color:var(--brand);}
.foot-bottom{
  border-top:1px solid var(--dark-line);padding:22px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:#7C828A;
}
.foot-bottom .mono{color:#9AA0A8;}
.foot-bottom a{color:#9AA0A8;border-bottom:1px solid #3A3E44;}
.foot-bottom a:hover{color:var(--brand);border-color:var(--brand);}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:32px;bottom:32px;z-index:70;
  display:inline-flex;align-items:center;gap:10px;
  height:52px;padding:0 26px;border-radius:var(--r-pill);
  background:var(--brand);color:#fff;font-weight:800;font-size:15px;
  box-shadow:0 18px 40px -16px rgba(255,74,28,.6);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s,background-color .18s var(--ease);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:none;}
.float-cta:hover{background:var(--brand-dark);transform:translateY(-2px);}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .34s var(--ease),transform .34s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:none;}}

/* ---------- 移动目录 ---------- */
.toc-mobile{display:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .grid-container{padding-left:28px!important;padding-right:28px!important;}
  .section{padding:80px 0;}
  .cat-hero__inner{grid-template-columns:1fr;gap:36px;}
  .guide-wrap{grid-template-columns:1fr;gap:36px;}
  .toc{display:none;}
  .toc-mobile{
    display:block;position:sticky;top:113px;z-index:40;
    background:rgba(245,243,239,.96);border-bottom:1px solid var(--line);
    margin:0 -28px 32px;padding:12px 28px;
  }
  .toc-mobile__inner{display:flex;gap:10px;overflow-x:auto;scrollbar-width:none;}
  .toc-mobile__inner::-webkit-scrollbar{display:none;}
  .toc-mobile a{
    flex:0 0 auto;font-size:13px;font-weight:700;color:var(--ink-2);
    padding:8px 14px;border:1px solid var(--line);border-radius:var(--r-pill);background:#fff;
  }
  .toc-mobile a.is-current{color:#fff;background:var(--brand);border-color:var(--brand);}
  .timeline{padding-left:32px;}
  .timeline::before{left:9px;}
  .step::before{left:-28px;}
  .checklist{grid-template-columns:1fr 1fr;}
  .statbar{grid-template-columns:1fr 1fr;}
  .statbar__item:nth-child(2){border-right:0;}
  .statbar__item:nth-child(n+3){border-top:1px solid var(--line);}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;padding:56px 0 36px;}
}
@media (max-width:768px){
  .searchtoggle span,.searchtoggle{display:none;}
  .brand-cta{display:none;}
  .navtoggle{display:block;}
  .channelbar__inner{gap:20px;}
  .cta-band__inner{flex-direction:column;align-items:flex-start;padding:56px 0;}
  .float-cta{
    right:0;left:0;bottom:0;width:100%;height:56px;justify-content:center;
    border-radius:0;padding:0 20px calc(0px + env(safe-area-inset-bottom));
  }
  .foot-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .grid-container{padding-left:20px!important;padding-right:20px!important;}
  .section{padding:60px 0;}
  .section__head{margin-bottom:28px;}
  .cat-hero{padding:44px 0 40px;}
  .cat-hero__actions .btn{width:100%;}
  .checklist{grid-template-columns:1fr;}
  .statbar{grid-template-columns:1fr;}
  .statbar__item{border-right:0;border-top:0;border-bottom:1px solid var(--line);}
  .statbar__item:last-child{border-bottom:0;}
  .timeline{padding-left:28px;}
  .step h3{font-size:19px;}
  .toc-mobile{margin:0 -20px 28px;padding:12px 20px;top:113px;}
  .searchpane form .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root{
  --brand:#FF4A1C;
  --brand-dark:#E63E12;
  --accent:#12C2A0;
  --accent-soft:rgba(18,194,160,.12);
  --bg:#F5F3EF;
  --surface:#FFFFFF;
  --ink:#15171A;
  --ink-2:#5A5F66;
  --ink-3:#8A9099;
  --line:#E3E0D9;
  --dark:#111214;
  --dark-2:#1A1C1F;
  --dark-line:#26282C;
  --on-dark:#F5F3EF;
  --on-dark-2:#A8AEB6;
  --r-card:18px;
  --r-img:14px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(17,18,20,.04);
  --sh-2:0 12px 32px -14px rgba(17,18,20,.14);
  --ease:cubic-bezier(.2,.7,.2,1);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
a:hover{color:inherit}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
h1,h2,h3,h4{line-height:1.2;font-weight:800}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(255,74,28,.28);border-radius:8px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- layout ---------- */
.grid-container{max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;width:100%}
@media (min-width:768px){.grid-container{padding-left:28px;padding-right:28px}}
@media (min-width:1024px){.grid-container{padding-left:40px;padding-right:40px}}
.section{padding:60px 0}
@media (min-width:768px){.section{padding:80px 0}}
@media (min-width:1024px){.section{padding:104px 0}}
.section--tight{padding:48px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head--row{display:flex;flex-wrap:wrap;gap:24px;align-items:flex-end;justify-content:space-between;max-width:none}
.eyebrow{
  display:inline-block;font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-3);margin-bottom:16px;
}
h1{font-size:clamp(30px,4.6vw,50px);font-weight:900;line-height:1.15;letter-spacing:-.02em}
h2{font-size:clamp(26px,3.4vw,40px);font-weight:800;line-height:1.18;letter-spacing:-.02em}
h3{font-size:20px;font-weight:700;line-height:1.4}
h4{font-size:16px;font-weight:700;line-height:1.4}
.section-desc{color:var(--ink-2);font-size:16px;line-height:1.85;margin-top:16px}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;border:1.5px solid transparent;
  transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#fff}
.btn--primary:hover{background:var(--brand-dark);transform:translateY(-1px)}
.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(--bg)}
.btn--ghost:active{transform:translateY(1px)}
.btn--sm{height:40px;padding:0 18px;font-size:14px}
.btn--block{width:100%}
.btn--on-dark{background:transparent;border-color:#3A3E44;color:var(--on-dark)}
.btn--on-dark:hover{background:var(--on-dark);color:var(--dark)}
.link-arrow{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  font-weight:700;font-size:15px;color:var(--ink);padding-bottom:4px;
}
.link-arrow::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--brand);
  transition:width .24s var(--ease);
}
.link-arrow span{transition:transform .24s var(--ease)}
.link-arrow:hover{color:var(--brand)}
.link-arrow:hover::after{width:100%}
.link-arrow:hover span{transform:translateX(3px)}

/* ---------- badges / tags ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;line-height:1.6;
  padding:4px 10px;border-radius:var(--r-pill);background:var(--accent-soft);color:#0E8F78;font-weight:700;
}
.badge--outline{background:transparent;border:1px solid var(--line);color:var(--ink-2)}
.tag{
  display:inline-flex;align-items:center;height:38px;padding:0 16px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--surface);font-size:14px;font-weight:600;color:var(--ink-2);
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.tag:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}

/* ---------- header ---------- */
.site-head{position:sticky;top:0;z-index:80;background:var(--bg);border-bottom:1px solid var(--line)}
.brandbar{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.logo{display:flex;flex-direction:column;line-height:1.1;padding:2px 0}
.logo__main{font-size:18px;font-weight:900;letter-spacing:-.02em;color:var(--ink)}
.logo__main em{font-style:normal;color:var(--brand)}
.logo__sub{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);margin-top:3px}
.brandactions{display:flex;align-items:center;gap:20px}
.searchtoggle{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--ink-2);transition:color .18s var(--ease)}
.searchtoggle:hover{color:var(--brand)}
.searchtoggle svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round}
.brand-cta{
  position:relative;font-size:14px;font-weight:700;color:var(--brand);padding-bottom:3px;
}
.brand-cta::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease)}
.brand-cta:hover::after{transform:scaleX(1)}
.navtoggle{display:none;width:40px;height:40px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:10px;background:var(--surface)}
.navtoggle span{position:relative;display:block;width:16px;height:2px;background:var(--ink);border-radius:2px}
.navtoggle span::before,.navtoggle span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);border-radius:2px}
.navtoggle span::before{top:-5px}
.navtoggle span::after{top:5px}
.searchpane{display:none;border-top:1px solid var(--line);background:var(--surface)}
.searchpane.is-open{display:block}
.searchpane form{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;padding:18px 0}
.searchpane label{display:block;font-size:13px;font-weight:700;color:var(--ink-2);margin-bottom:8px;width:100%}
.searchpane input[type="search"]{
  flex:1 1 260px;height:48px;padding:0 16px;border:1px solid var(--line);border-radius:var(--r-btn);background:var(--bg);
}
.searchpane input[type="search"]:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(255,74,28,.12)}
.channelbar{border-top:1px solid var(--line);background:var(--bg)}
.channelbar__inner{
  display:flex;align-items:stretch;gap:26px;height:48px;overflow-x:auto;
  scrollbar-width:none;-ms-overflow-style:none;
}
.channelbar__inner::-webkit-scrollbar{display:none}
.channel-link{
  display:inline-flex;align-items:center;white-space:nowrap;font-size:14.5px;font-weight:600;
  color:var(--ink-2);border-bottom:2px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease);
}
.channel-link:hover{color:var(--ink);border-bottom-color:rgba(21,23,26,.35)}
.channel-link.is-active{color:var(--brand);border-bottom-color:var(--brand)}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;inset:0;z-index:120;background:var(--bg);display:none;flex-direction:column;
  padding:20px;overflow-y:auto;
}
.drawer.is-open{display:flex}
.drawer__top{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid var(--line)}
.drawer__brand{font-size:17px;font-weight:900;letter-spacing:-.02em}
.drawer__close{width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:var(--surface);font-size:20px;line-height:1}
.drawer__nav{display:flex;flex-direction:column;padding:12px 0}
.drawer__nav a{padding:16px 0;font-size:17px;font-weight:700;border-bottom:1px solid var(--line);color:var(--ink)}
.drawer__nav a.is-active{color:var(--brand)}
.drawer__actions{padding-top:24px}

/* ---------- hero ---------- */
.hero-help{
  position:relative;padding:44px 0 56px;border-bottom:1px solid var(--line);overflow:hidden;
  background-image:linear-gradient(to right,rgba(21,23,26,.035) 1px,transparent 1px),linear-gradient(to bottom,rgba(21,23,26,.035) 1px,transparent 1px);
  background-size:56px 56px;
}
.hero-help__grid{row-gap:36px}
.hero-help__lead{font-size:17px;color:var(--ink-2);margin-top:20px;max-width:620px}
.hero-help__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-help__meta{display:flex;flex-wrap:wrap;gap:24px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line)}
.hero-help__meta dl{margin:0}
.hero-help__meta dt{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3)}
.hero-help__meta dd{margin:4px 0 0;font-size:15px;font-weight:700;color:var(--ink)}
.media-frame{position:relative;border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden;background:var(--surface);box-shadow:var(--sh-1)}
.media-frame img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s var(--ease)}
.media-frame:hover img{transform:scale(1.03)}
.media-note{
  position:absolute;left:14px;bottom:14px;display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.94);border:1px solid var(--line);border-radius:var(--r-pill);
  padding:6px 14px;font-size:12.5px;font-weight:700;color:var(--ink);
}
.media-note .dot{width:8px;height:8px;border-radius:50%;background:var(--accent)}

/* ---------- search zone ---------- */
.search-zone{padding:40px 0;border-bottom:1px solid var(--line);background:var(--bg)}
.search-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-1)}
@media (min-width:768px){.search-card{padding:32px 36px}}
.search-form{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-end}
.field{flex:1 1 320px;min-width:0}
.field label{display:block;font-size:13px;font-weight:700;color:var(--ink-2);margin-bottom:8px;letter-spacing:.02em}
.field input{
  width:100%;height:48px;padding:0 16px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:var(--bg);transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(255,74,28,.12)}
.field input.is-error{border-color:var(--accent);box-shadow:0 0 0 4px rgba(18,194,160,.16)}
.field-msg{margin-top:8px;font-size:13px;color:#0E8F78}
.search-hint{margin-top:14px;font-size:14px;color:var(--ink-2)}
.quick-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;padding-top:22px;border-top:1px solid var(--line)}

/* ---------- faq layout ---------- */
.faq-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px;align-items:start}
@media (min-width:1024px){.faq-layout{grid-template-columns:minmax(0,1fr) 336px;gap:56px}}
.faq-side{display:flex;flex-direction:column;gap:20px}
@media (min-width:1024px){.faq-side{position:sticky;top:132px}}
.faq-meta{display:flex;flex-wrap:wrap;gap:18px;align-items:center;margin-bottom:28px;font-size:13px;color:var(--ink-3)}
.from-note{font-size:13px;color:var(--ink-3)}
.faq-group{margin-bottom:40px}
.faq-group:last-child{margin-bottom:0}
.faq-group__title{display:flex;align-items:center;gap:14px;margin-bottom:8px}
.faq-group__title .idx{font-family:var(--mono);font-size:13px;color:var(--brand);letter-spacing:.06em}
.faq-group__title h3{font-size:21px}

/* ---------- accordion ---------- */
.acc{border-top:1px solid var(--line)}
.acc-item{border-bottom:1px solid var(--line);transition:background-color .2s var(--ease)}
.acc-item.is-open{background:rgba(255,255,255,.6)}
.acc-btn{display:flex;align-items:flex-start;gap:16px;width:100%;text-align:left;padding:22px 4px}
.acc-num{flex:0 0 34px;font-family:var(--mono);font-size:13px;line-height:1.6;color:var(--ink-3);padding-top:3px;transition:color .2s var(--ease)}
.acc-q{flex:1;font-size:17.5px;font-weight:700;line-height:1.5;color:var(--ink);transition:color .2s var(--ease)}
.acc-sign{position:relative;flex:0 0 16px;width:16px;height:16px;margin-top:7px;transition:transform .28s var(--ease)}
.acc-sign::before,.acc-sign::after{content:"";position:absolute;left:50%;top:50%;background:var(--ink-3);transition:background-color .2s var(--ease)}
.acc-sign::before{width:14px;height:1.6px;transform:translate(-50%,-50%)}
.acc-sign::after{width:1.6px;height:14px;transform:translate(-50%,-50%)}
.acc-btn:hover .acc-num{color:var(--brand)}
.acc-btn:hover .acc-q{color:var(--brand)}
.acc-item.is-open .acc-sign{transform:rotate(45deg)}
.acc-item.is-open .acc-num{color:var(--brand)}
.acc-item.is-open .acc-sign::before,.acc-item.is-open .acc-sign::after{background:var(--brand)}
.acc-panel{height:0;overflow:hidden;transition:height .32s var(--ease)}
.acc-inner{padding:0 40px 24px 50px;font-size:15.5px;line-height:1.85;color:var(--ink-2);opacity:.4;transition:opacity .3s var(--ease)}
.acc-item.is-open .acc-inner{opacity:1}
.acc-inner p+p{margin-top:12px}
.acc-inner ul{margin-top:12px}
.acc-inner li{position:relative;padding-left:18px;margin-bottom:8px}
.acc-inner li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;background:var(--brand);border-radius:1px}
.acc-inner strong{color:var(--ink);font-weight:700}

/* ---------- side cards ---------- */
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-1)}
.side-card h3{font-size:19px;margin-top:14px}
.side-card p{font-size:14.5px;color:var(--ink-2);margin-top:12px}
.check-list{margin:18px 0 22px}
.check-list li{position:relative;padding-left:22px;font-size:14.5px;color:var(--ink-2);margin-bottom:10px}
.check-list li::before{
  content:"";position:absolute;left:0;top:.7em;width:10px;height:10px;border-radius:2px;
  background:var(--brand);
}
.side-note{margin-top:14px;font-size:13px;color:var(--ink-3)}
.side-card--dark{background:var(--dark);border-color:var(--dark-line);box-shadow:none}
.side-card--dark h3,.side-card--dark p{color:var(--on-dark)}
.side-card--dark p{color:var(--on-dark-2)}
.side-card--dark .side-note{color:var(--on-dark-2)}
.side-card--dark .badge{background:transparent;border:1px solid #3A3E44;color:var(--on-dark)}
.stat-list{margin-top:20px;border-top:1px solid var(--dark-line)}
.stat-list div{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--dark-line)}
.stat-list strong{font-family:var(--mono);font-size:20px;color:var(--on-dark)}
.stat-list span{font-size:13.5px;color:var(--on-dark-2)}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:1fr;gap:0;margin-top:8px}
.step{display:flex;gap:20px;padding-bottom:30px;position:relative}
.step:last-child{padding-bottom:0}
.step::before{content:"";position:absolute;left:15px;top:34px;bottom:0;width:1px;background:var(--line)}
.step:last-child::before{display:none}
.step__num{
  flex:0 0 32px;width:32px;height:32px;border-radius:50%;border:1px solid var(--line);background:var(--surface);
  display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:13px;color:var(--brand);
}
.step__body h3{font-size:18px}
.step__body p{font-size:15px;color:var(--ink-2);margin-top:8px}

/* ---------- quick qna ---------- */
.qna-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:700px){.qna-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.qna-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.qna-card{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.qna-card::before{content:"";position:absolute;left:26px;top:26px;width:8px;height:8px;border-radius:2px;background:var(--brand)}
.qna-card h3{font-size:18px;margin-top:22px}
.qna-card p{font-size:15px;color:var(--ink-2);margin-top:10px}
.qna-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D6D2C8}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--dark);color:var(--on-dark);
  background-image:repeating-linear-gradient(135deg,rgba(255,255,255,.03) 0 1px,transparent 1px 14px);
}
.cta-band__inner{display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between;padding:56px 0}
@media (min-width:1024px){.cta-band__inner{padding:72px 0}}
.cta-band h2{color:var(--on-dark);font-size:clamp(24px,3vw,36px)}
.cta-band p{color:var(--on-dark-2);margin-top:12px;max-width:620px}
.cta-band .actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- footer ---------- */
.site-foot{background:var(--dark);color:var(--on-dark);border-top:1px solid var(--dark-line)}
.foot-grid{display:grid;grid-template-columns:1fr;gap:36px;padding:56px 0 44px}
@media (min-width:640px){.foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.foot-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding:72px 0 56px}}
.foot-logo{display:block;font-size:17px;font-weight:900;letter-spacing:-.02em;color:var(--on-dark)}
.foot-logo em{font-style:normal;color:var(--brand)}
.foot-brand p{font-size:14.5px;color:var(--on-dark-2);margin-top:16px;max-width:340px}
.foot-col h4{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--on-dark-2);font-family:var(--mono);font-weight:500}
.foot-col ul{margin-top:18px}
.foot-col li{margin-bottom:12px}
.foot-col a,.foot-col span{font-size:14.5px;color:var(--on-dark)}
.foot-col a{position:relative;transition:color .2s var(--ease)}
.foot-col a:hover{color:var(--brand)}
.foot-bottom{
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  padding:22px 0 28px;border-top:1px solid var(--dark-line);font-size:13px;color:var(--on-dark-2);
}
.foot-bottom .mono{color:var(--on-dark-2)}

/* ---------- float cta ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:90;
  display:inline-flex;align-items:center;justify-content:center;height:52px;padding:0 26px;
  background:var(--brand);color:#fff;font-weight:700;font-size:15px;border-radius:var(--r-pill);
  box-shadow:0 16px 32px -16px rgba(255,74,28,.7);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease),background-color .18s var(--ease);
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{background:var(--brand-dark)}
@media (max-width:767px){
  .float-cta{
    right:0;left:0;bottom:0;height:56px;border-radius:0;padding:0 20px calc(0px + env(safe-area-inset-bottom));
    box-shadow:0 -8px 24px -16px rgba(17,18,20,.4);
  }
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none!important;transition-duration:.001ms!important}
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .navtoggle{display:inline-flex}
  .brandactions .brand-cta{display:none}
}
@media (max-width:767px){
  body{font-size:15.5px;line-height:1.8}
  h1{font-size:clamp(28px,7vw,38px)}
  h2{font-size:clamp(22px,6vw,30px)}
  .hero-help{padding:32px 0 44px}
  .section{padding:60px 0}
  .section-head{margin-bottom:28px}
  .search-card{padding:22px}
  .acc-btn{padding:18px 2px}
  .acc-q{font-size:16px}
  .acc-inner{padding:0 8px 20px 42px}
  .side-card{padding:22px}
  .cta-band__inner{padding:48px 0}
  .cta-band .actions{width:100%}
  .cta-band .btn{width:100%}
  .float-cta{margin-bottom:0}
  body.has-float{padding-bottom:56px}
}
@media (max-width:520px){
  .brandactions{gap:12px}
  .searchtoggle span.txt{display:none}
  .channelbar__inner{gap:20px}
  .channel-link{font-size:14px}
  .hero-help__actions .btn{width:100%}
  .quick-tags .tag{flex:1 1 auto;justify-content:center}
}

/* roulang page: category4 */
:root{
  --brand:#FF4A1C;
  --brand-dark:#E63E12;
  --brand-soft:rgba(255,74,28,.10);
  --accent:#12C2A0;
  --accent-soft:rgba(18,194,160,.12);
  --bg:#F5F3EF;
  --surface:#FFFFFF;
  --ink:#111214;
  --line-dark:#26282C;
  --text:#15171A;
  --text-2:#5A5F66;
  --text-3:#8A9099;
  --border:#E3E0D9;
  --border-dark:#2A2D31;
  --r-card:18px;
  --r-img:14px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(17,18,20,.04);
  --sh-2:0 12px 32px -14px rgba(17,18,20,.14);
  --sh-3:0 20px 44px -18px rgba(17,18,20,.24);
  --ease:cubic-bezier(.2,.7,.2,1);
  --sec-y:104px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease),opacity .18s var(--ease)}
a:hover{color:var(--brand)}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4,p,ul,ol,figure,table,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus{outline:none}
:focus-visible{outline:3px solid rgba(255,74,28,.28);outline-offset:2px;border-radius:4px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums;letter-spacing:.02em}
.grid-container{max-width:1200px;width:100%;padding-left:40px;padding-right:40px;margin-left:auto;margin-right:auto}
.grid-x{align-items:stretch}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-3);font-weight:700}
.eyebrow--dark{color:#A8AEB6}
.hr{height:1px;background:var(--border);border:0}

/* ---------- 按钮系统 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;line-height:1;white-space:nowrap;
  border:1.5px solid transparent;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn--primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:translateY(0)}
.btn--outline{background:transparent;border-color:var(--text);color:var(--text)}
.btn--outline:hover{background:var(--text);color:var(--bg);transform:translateY(-1px)}
.btn--outline:active{transform:translateY(0)}
.btn--ghost-dark{background:transparent;border-color:#3A3E44;color:#F5F3EF}
.btn--ghost-dark:hover{background:#F5F3EF;border-color:#F5F3EF;color:#15171A;transform:translateY(-1px)}
.btn--sm{height:42px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none!important}
.link-arrow{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  font-weight:700;font-size:15px;color:var(--text);padding-bottom:2px;
}
.link-arrow::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--brand);
  transition:width .22s var(--ease);
}
.link-arrow span{transition:transform .22s var(--ease)}
.link-arrow:hover{color:var(--brand)}
.link-arrow:hover::after{width:100%}
.link-arrow:hover span{transform:translateX(3px)}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;line-height:1;padding:5px 10px;border-radius:var(--r-pill);
  background:var(--accent-soft);color:#0B8F76;font-weight:600;
}
.badge--dark{background:transparent;border:1px solid var(--border-dark);color:#A8AEB6}

/* ---------- 站点头部 ---------- */
.site-head{
  position:relative;z-index:90;background:var(--bg);
  border-bottom:1px solid var(--border);
}
.brandbar{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;flex-direction:column;justify-content:center;line-height:1.15}
.logo__main{font-size:19px;font-weight:900;letter-spacing:-.02em;color:var(--text)}
.logo__main em{font-style:normal;color:var(--brand)}
.logo__sub{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-3);font-weight:700;margin-top:2px}
.brandactions{display:flex;align-items:center;gap:18px}
.searchtoggle{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--text-2);
  padding:8px 4px;border-radius:8px;
}
.searchtoggle svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}
.searchtoggle:hover{color:var(--brand)}
.brand-cta{font-size:14px;font-weight:800;color:var(--brand);padding:8px 2px;border-bottom:2px solid transparent;transition:border-color .18s var(--ease)}
.brand-cta:hover{border-color:var(--brand)}
.navtoggle{display:none;width:42px;height:42px;border:1px solid var(--border);border-radius:var(--r-btn);align-items:center;justify-content:center;background:var(--surface)}
.navtoggle span{position:relative;display:block;width:18px;height:1.8px;background:var(--text);border-radius:2px;transition:background .2s var(--ease)}
.navtoggle span::before,.navtoggle span::after{content:"";position:absolute;left:0;width:18px;height:1.8px;background:var(--text);border-radius:2px;transition:transform .22s var(--ease)}
.navtoggle span::before{top:-6px}
.navtoggle span::after{top:6px}
.site-head.is-open .navtoggle span{background:transparent}
.site-head.is-open .navtoggle span::before{transform:translateY(6px) rotate(45deg)}
.site-head.is-open .navtoggle span::after{transform:translateY(-6px) rotate(-45deg)}
.searchpane{display:none;background:var(--surface);border-top:1px solid var(--border);padding:20px 0}
.searchpane form{display:flex;flex-wrap:wrap;align-items:flex-end;gap:14px}
.searchpane label{display:block;font-size:13px;font-weight:700;color:var(--text-2);width:100%;margin-bottom:6px}
.searchpane input{
  flex:1 1 260px;height:48px;padding:0 16px;border:1px solid var(--border);border-radius:var(--r-btn);
  background:#fff;transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.searchpane input:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(255,74,28,.12)}
.channelbar{background:var(--bg)}
.channelbar__inner{display:flex;align-items:center;gap:32px;height:48px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.channelbar__inner::-webkit-scrollbar{display:none}
.channel-link{
  position:relative;display:inline-flex;align-items:center;height:48px;
  font-size:15px;font-weight:600;color:var(--text-2);white-space:nowrap;
}
.channel-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:transparent;transition:background .18s var(--ease)}
.channel-link:hover{color:var(--text)}
.channel-link:hover::after{background:rgba(255,74,28,.4)}
.channel-link.is-active{color:var(--brand)}
.channel-link.is-active::after{background:var(--brand)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;background:var(--ink);color:#F5F3EF;
  padding:96px 0 72px;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(135deg,rgba(255,255,255,.028) 0 1px,transparent 1px 16px);
}
.hero__grid{position:relative;z-index:2}
.hero h1{
  font-size:clamp(34px,5vw,58px);font-weight:900;line-height:1.06;letter-spacing:-.03em;
  margin:16px 0 20px;color:#F5F3EF;
}
.hero__lead{font-size:16px;line-height:1.8;color:#A8AEB6;max-width:560px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero__media{margin-top:36px}
.media{
  position:relative;overflow:hidden;border-radius:var(--r-img);
  border:1px solid var(--border);background:#fff;
}
.media--dark{border-color:var(--border-dark)}
.media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;transition:transform .5s var(--ease)}
.media:hover img{transform:scale(1.03)}
.media__tag{
  position:absolute;left:16px;bottom:16px;z-index:3;
  background:rgba(17,18,20,.86);color:#F5F3EF;border:1px solid var(--border-dark);
  border-radius:var(--r-pill);font-size:12px;padding:6px 12px;line-height:1.4;
}
.statbar{
  position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);
  gap:1px;margin-top:64px;border:1px solid var(--border-dark);border-radius:var(--r-card);overflow:hidden;
}
.statbar li{padding:24px 22px;background:#15171A;border-right:1px solid var(--border-dark)}
.statbar li:last-child{border-right:0}
.statbar__num{display:block;font-size:clamp(24px,3.2vw,34px);font-weight:800;color:#F5F3EF;line-height:1.2}
.statbar__label{display:block;font-size:13px;color:#A8AEB6;margin-top:6px}

/* ---------- 板块 ---------- */
.section{padding:var(--sec-y) 0}
.section--tight{padding:72px 0}
.section--alt{background:#EFECE5}
.sec-head{max-width:720px;margin-bottom:48px}
.sec-head h2{
  font-size:clamp(26px,3.4vw,42px);font-weight:800;line-height:1.18;letter-spacing:-.02em;
  margin:14px 0 16px;
}
.sec-head__desc{font-size:15px;line-height:1.8;color:var(--text-2)}
.sec-head--split{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}

/* ---------- 对照表 ---------- */
.ctable-wrap{
  border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden;background:var(--surface);
  box-shadow:var(--sh-1);
}
.ctable{width:100%;border-collapse:separate;border-spacing:0}
.ctable caption{
  text-align:left;padding:20px 22px;font-size:13px;font-weight:700;color:var(--text-2);
  border-bottom:1px solid var(--border);letter-spacing:.02em;
}
.ctable th,.ctable td{padding:18px 22px;text-align:left;vertical-align:top;border-bottom:1px solid var(--border)}
.ctable th{
  font-size:13px;font-weight:700;color:var(--text-2);letter-spacing:.06em;
  border-bottom:1px solid var(--brand);
}
.ctable tbody tr:last-child td{border-bottom:0}
.ctable tbody tr{transition:background .18s var(--ease)}
.ctable tbody tr:hover{background:#FBF9F5}
.ctable td:first-child{width:32%;font-weight:700;color:var(--text);white-space:nowrap}
.ctable td:last-child{color:var(--text-2);font-size:15px}
.sidecard{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);margin-top:24px;
}
.sidecard h3{font-size:19px;font-weight:700;margin-bottom:14px}
.checklist li{
  position:relative;padding-left:24px;font-size:15px;line-height:1.8;color:var(--text-2);margin-bottom:12px;
}
.checklist li:last-child{margin-bottom:0}
.checklist li::before{
  content:"";position:absolute;left:0;top:.62em;width:10px;height:10px;border-radius:3px;
  background:var(--brand-soft);border:1.5px solid var(--brand);
}

/* ---------- 时间线 ---------- */
.timeline{position:relative;padding-left:30px;max-width:880px}
.timeline::before{content:"";position:absolute;left:5px;top:8px;bottom:8px;width:1px;background:var(--border)}
.timeline__item{position:relative;padding:0 0 40px 0}
.timeline__item:last-child{padding-bottom:0}
.timeline__item::before{
  content:"";position:absolute;left:-30px;top:8px;width:11px;height:11px;border-radius:50%;
  background:var(--bg);border:2px solid var(--brand);
  transition:background .18s var(--ease);
}
.timeline__item:hover::before{background:var(--brand)}
.timeline__meta{font-size:13px;color:var(--text-3);letter-spacing:.06em}
.timeline__item h3{font-size:20px;font-weight:700;line-height:1.4;margin:8px 0 10px}
.timeline__item p{font-size:15px;line-height:1.8;color:var(--text-2);max-width:760px}
.timeline__tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--border);max-width:900px}
.faq__item{border-bottom:1px solid var(--border)}
.faq__q{
  width:100%;display:flex;align-items:center;gap:16px;padding:24px 0;text-align:left;
  font-size:17px;font-weight:700;color:var(--text);transition:color .18s var(--ease);
}
.faq__q:hover{color:var(--brand)}
.faq__num{font-size:12px;color:var(--text-3);font-weight:700;min-width:26px;letter-spacing:.06em}
.faq__icon{
  margin-left:auto;position:relative;width:16px;height:16px;flex:0 0 16px;
}
.faq__icon::before,.faq__icon::after{
  content:"";position:absolute;background:var(--text-3);transition:transform .24s var(--ease),background .18s var(--ease);
}
.faq__icon::before{left:0;top:7px;width:16px;height:1.6px}
.faq__icon::after{left:7px;top:0;width:1.6px;height:16px}
.faq__item.is-open .faq__icon::before{background:var(--brand)}
.faq__item.is-open .faq__icon::after{transform:rotate(90deg);opacity:0}
.faq__a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq__a p{padding:0 42px 24px 42px;font-size:15px;line-height:1.85;color:var(--text-2)}
.faq__item.is-open .faq__q{color:var(--brand)}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--ink);color:#F5F3EF;padding:72px 0;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(45deg,rgba(255,255,255,.025) 0 1px,transparent 1px 18px);
}
.cta-band__inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px}
.cta-band h2{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.2;letter-spacing:-.02em}
.cta-band p{color:#A8AEB6;font-size:15px;margin-top:10px;max-width:620px}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--ink);color:#F5F3EF;padding-top:72px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:56px}
.foot-brand .logo__main{color:#F5F3EF;font-size:20px}
.foot-brand .logo__sub{color:#8A9099}
.foot-brand p{font-size:14px;color:#A8AEB6;line-height:1.8;margin-top:14px;max-width:320px}
.foot-col h4{font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:#8A9099;font-weight:700;margin-bottom:18px}
.foot-col li{margin-bottom:12px}
.foot-col a,.foot-col span{font-size:14px;color:#A8AEB6;transition:color .18s var(--ease)}
.foot-col a:hover{color:var(--brand)}
.foot-bar{border-top:1px solid var(--line-dark)}
.foot-bar__inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;padding-top:24px;padding-bottom:28px}
.foot-bar p,.foot-bar span{font-size:13px;color:#8A9099}
.foot-bar__meta{display:flex;flex-wrap:wrap;align-items:center;gap:20px}
.foot-bar__meta a{font-size:13px;color:#A8AEB6;border-bottom:1px solid var(--border-dark)}
.foot-bar__meta a:hover{color:var(--brand);border-color:var(--brand)}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;justify-content:center;
  height:52px;padding:0 24px;border-radius:var(--r-pill);
  background:var(--brand);color:#fff;font-weight:800;font-size:15px;
  box-shadow:var(--sh-3);
  opacity:0;pointer-events:none;transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),background .18s var(--ease);
}
.float-cta:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px)}
.float-cta.is-visible{opacity:1;pointer-events:auto;transform:translateY(0)}
.float-cta.is-muted{opacity:0;pointer-events:none;transform:translateY(12px)}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  :root{--sec-y:80px}
  .grid-container{padding-left:28px;padding-right:28px}
  .navtoggle{display:inline-flex}
  .searchtoggle{display:none}
  .channelbar{
    position:fixed;inset:0;z-index:85;display:none;background:var(--bg);
    padding:88px 28px 40px;overflow-y:auto;
  }
  .site-head.is-open .channelbar{display:block}
  .channelbar__inner{display:block;height:auto;overflow:visible;gap:0}
  .channel-link{
    display:flex;width:100%;height:auto;padding:18px 0;font-size:19px;
    border-bottom:1px solid var(--border);
  }
  .channel-link::after{display:none}
  .channel-link.is-active{color:var(--brand)}
  .hero{padding:72px 0 56px}
  .statbar{grid-template-columns:repeat(2,1fr);margin-top:48px}
  .statbar li:nth-child(2){border-right:0}
  .statbar li:nth-child(1),.statbar li:nth-child(2){border-bottom:1px solid var(--border-dark)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{padding:56px 0}
  .float-cta{right:20px;bottom:20px}
}
@media (max-width:639px){
  :root{--sec-y:60px}
  .grid-container{padding-left:20px;padding-right:20px}
  .logo__main{font-size:16px}
  .logo__sub{font-size:10px;letter-spacing:.1em}
  .hero{padding:56px 0 44px}
  .hero h1{font-size:32px}
  .hero__lead{font-size:15px}
  .hero__actions .btn{flex:1 1 100%}
  .statbar{grid-template-columns:1fr}
  .statbar li{border-right:0;border-bottom:1px solid var(--border-dark);padding:20px}
  .statbar li:last-child{border-bottom:0}
  .sec-head h2{font-size:26px}
  .ctable th,.ctable td{padding:14px 16px;font-size:14px}
  .ctable td:first-child{width:38%;white-space:normal}
  .timeline{padding-left:24px}
  .timeline__item::before{left:-24px}
  .faq__a p{padding-left:0;padding-right:0}
  .foot-grid{grid-template-columns:1fr 1fr;gap:24px;padding-bottom:40px}
  .foot-brand{grid-column:1 / -1}
  .cta-band__inner .btn{width:100%}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;height:56px;
    padding-bottom:env(safe-area-inset-bottom);
    box-shadow:0 -8px 24px -12px rgba(17,18,20,.4);
  }
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}