/* roulang page: index */
:root{
  --brand:#D9523B;
  --brand-hover:#B8422E;
  --brand-active:#9E3724;
  --teal:#1B7C6E;
  --teal-hover:#146357;
  --amber:#F0A83C;
  --bg:#FBF7F2;
  --bg-alt:#F5EFE6;
  --card:#FFFFFF;
  --line:#E9E1D6;
  --ink:#1F2124;
  --ink-2:#5C5F63;
  --radius:14px;
  --radius-sm:10px;
  --shadow-1:0 1px 2px rgba(31,33,36,.06);
  --shadow-2:0 8px 24px rgba(31,33,36,.09);
}
*,*::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:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16.5px;
  line-height:1.8;
}
img{max-width:100%;display:block;}
a{color:var(--teal);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;transition:color .2s ease;}
a:hover{color:var(--teal-hover);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:.2px;}
h1{font-size:clamp(28px,4vw,44px);line-height:1.25;}
h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3;}
h3{font-size:19px;line-height:1.4;font-weight:600;}
p{margin:0 0 1em;}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media(min-width:768px){.container{padding-left:24px;padding-right:24px;}}
.section{padding:48px 0;}
@media(min-width:768px){.section{padding:76px 0;}}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--brand);font-weight:600;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:5px 14px;letter-spacing:.5px;
}
.section-head{max-width:780px;margin-bottom:32px;}
.section-head p{color:var(--ink-2);font-size:16px;margin-top:12px;margin-bottom:0;}
.sec-title{position:relative;padding-bottom:12px;}
.sec-title::after{
  content:"";position:absolute;left:0;bottom:0;width:56px;height:3px;border-radius:2px;background:var(--brand);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-sm);
  font-size:15.5px;font-weight:600;text-decoration:none;border:1px solid transparent;
  cursor:pointer;transition:background-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.btn:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-primary:active{background:var(--brand-active);}
.btn-outline{background:#fff;color:var(--teal);border-color:var(--teal);}
.btn-outline:hover{background:var(--teal);color:#fff;transform:translateY(-1px);}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-sm{min-height:36px;padding:0 14px;font-size:14px;border-radius:8px;}
.btn-block{width:100%;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;line-height:1.6;padding:3px 11px;border-radius:999px;
  border:1px solid var(--teal);color:var(--teal);background:#fff;text-decoration:none;
}
.tag-solid{background:var(--brand);border-color:var(--brand);color:#fff;}
.tag-soft{background:#FBEFE9;border-color:#F0CFC4;color:var(--brand-hover);}
.tag-amber{background:#FDF3E2;border-color:#F2D8AC;color:#A96A12;}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(217,82,59,.3);}
.img-round{border-radius:var(--radius-sm);border:1px solid var(--line);object-fit:cover;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:rgba(251,247,242,.96);backdrop-filter:blur(8px);border-bottom:1px solid transparent;transition:box-shadow .2s ease,border-color .2s ease;}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:var(--shadow-1);}
.brand-row{display:flex;align-items:center;gap:16px;padding-top:12px;padding-bottom:12px;}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0;}
.brand-mark{
  width:40px;height:40px;border-radius:11px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:17px;letter-spacing:.5px;
  box-shadow:0 4px 12px rgba(217,82,59,.28);
}
.brand-text strong{display:block;font-size:17.5px;font-weight:700;color:var(--ink);line-height:1.3;}
.brand-text span{display:block;font-size:12px;color:var(--ink-2);line-height:1.4;}
.brand-row-search{flex:1;display:none;max-width:360px;}
.search-box{position:relative;display:flex;align-items:center;}
.search-box input{
  width:100%;height:40px;border-radius:999px;border:1px solid var(--line);background:#fff;
  padding:0 16px 0 38px;font-size:14px;color:var(--ink);outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box input::placeholder{color:#9A9CA0;}
.search-box input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(27,124,110,.14);}
.search-box svg{position:absolute;left:13px;width:16px;height:16px;color:var(--ink-2);}
.brand-actions{display:flex;align-items:center;gap:8px;margin-left:auto;}
@media(min-width:900px){.brand-row-search{display:block;}}

/* channel tabs */
.channel-row{position:relative;padding-bottom:10px;}
.channel-scroll{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding:2px 0 4px;}
.channel-scroll::-webkit-scrollbar{display:none;}
.channel-link{
  flex:0 0 auto;display:inline-flex;align-items:center;height:36px;padding:0 15px;
  border-radius:999px;font-size:14px;font-weight:500;color:var(--ink);
  background:#fff;border:1px solid var(--line);text-decoration:none;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.channel-link:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.channel-link.active{background:var(--brand);border-color:var(--brand);color:#fff;}
.channel-link.active:hover{color:#fff;background:var(--brand-hover);}
.channel-link:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}

/* hero */
.hero{position:relative;background:
  radial-gradient(circle at 1px 1px, rgba(31,33,36,.055) 1px, transparent 0) 0 0/22px 22px,
  var(--bg);
  padding:44px 0 56px;border-bottom:1px solid var(--line);overflow:hidden;}
.hero-grid{display:grid;gap:32px;align-items:start;}
@media(min-width:1024px){
  .hero-grid{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:48px;align-items:center;}
}
.hero h1{margin-top:16px;}
.hero h1 em{font-style:normal;color:var(--brand);}
.hero-lead{color:var(--ink-2);font-size:16.5px;margin:18px 0 0;max-width:620px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.hero-visual{position:relative;}
.hero-visual img{width:100%;height:auto;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow-2);}
.hero-bubble{
  position:absolute;left:-8px;bottom:22px;background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:10px 14px;font-size:13px;color:var(--ink-2);
  box-shadow:var(--shadow-2);max-width:74%;
}
.hero-bubble strong{color:var(--brand);font-weight:600;}
@media(max-width:640px){.hero-bubble{position:static;margin-top:14px;max-width:none;}}

/* help-center search hero block */
.ask-panel{margin-top:30px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:var(--shadow-1);}
.ask-panel h2{font-size:16px;font-weight:600;margin-bottom:12px;}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;}
.chip-row a{
  font-size:13px;padding:5px 12px;border-radius:999px;background:var(--bg-alt);
  border:1px solid var(--line);color:var(--ink-2);text-decoration:none;transition:.2s ease;
}
.chip-row a:hover{background:#fff;border-color:var(--brand);color:var(--brand);}

/* feature groups */
.feat-grid{display:grid;gap:20px;}
@media(min-width:900px){.feat-grid{grid-template-columns:1fr 1fr;gap:26px;}}
.feat-card{padding:24px;}
.feat-list{list-style:none;margin:14px 0 0;padding:0;}
.feat-list li{display:flex;gap:12px;padding:12px 0;border-top:1px dashed var(--line);}
.feat-list li:first-child{border-top:0;padding-top:4px;}
.feat-icon{
  flex:0 0 34px;width:34px;height:34px;border-radius:9px;display:grid;place-items:center;
  background:#EAF4F2;color:var(--teal);font-size:14px;font-weight:700;
}
.feat-list h4{font-size:15.5px;margin-bottom:2px;}
.feat-list p{margin:0;font-size:14px;color:var(--ink-2);line-height:1.7;}
.feat-top-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;}

/* scenarios */
.scene-grid{display:grid;gap:18px;}
@media(min-width:900px){
  .scene-grid{grid-template-columns:repeat(3,1fr);}
  .scene-main{grid-column:span 2;display:grid;grid-template-columns:1fr 1fr;gap:0;overflow:hidden;}
}
.scene-main{padding:0;overflow:hidden;}
.scene-main img{width:100%;height:100%;min-height:220px;object-fit:cover;}
.scene-main-body{padding:24px;}
.scene-main-body ul{margin:14px 0 0;padding-left:18px;color:var(--ink-2);font-size:14.5px;}
.scene-main-body ul li{margin-bottom:6px;}
.scene-card{padding:22px;display:flex;flex-direction:column;justify-content:space-between;min-height:170px;}
.scene-card p{font-size:14.5px;color:var(--ink-2);margin:10px 0 14px;}
.link-more{font-size:14px;font-weight:600;text-decoration:none;color:var(--teal);}
.link-more::after{content:" →";}
.link-more:hover{color:var(--teal-hover);}

/* steps */
.steps{display:grid;gap:18px;counter-reset:step;}
@media(min-width:768px){.steps{grid-template-columns:repeat(4,1fr);gap:20px;}}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 18px;}
.step-num{
  width:30px;height:30px;border-radius:999px;background:var(--amber);color:#4A2C00;
  display:grid;place-items:center;font-weight:700;font-size:14px;margin-bottom:12px;
}
.step h3{font-size:16.5px;margin-bottom:6px;}
.step p{margin:0;font-size:14px;color:var(--ink-2);}
@media(min-width:768px){
  .step:not(:last-child)::after{
    content:"";position:absolute;top:36px;right:-14px;width:12px;border-top:2px dashed #E0C9A8;
  }
}

/* demo */
.demo-grid{display:grid;gap:24px;align-items:center;}
@media(min-width:1024px){.demo-grid{grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:40px;}}
.demo-shot{padding:12px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-2);}
.demo-shot img{border-radius:10px;}
.demo-labels{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.demo-points{list-style:none;margin:0;padding:0;}
.demo-points li{display:flex;gap:14px;padding:14px 0;border-bottom:1px dashed var(--line);}
.demo-points li:last-child{border-bottom:0;}
.demo-points .num{flex:0 0 26px;font-weight:700;color:var(--brand);font-size:15px;}
.demo-points h4{font-size:15.5px;margin-bottom:2px;}
.demo-points p{margin:0;font-size:14px;color:var(--ink-2);}

/* stories */
.story-grid{display:grid;gap:20px;}
@media(min-width:900px){.story-grid{grid-template-columns:1fr 1fr;gap:26px;}}
.story-card{padding:24px;}
.story-card p{font-size:15px;color:var(--ink-2);margin:14px 0 16px;}

/* plans */
.plan-grid{display:grid;gap:20px;}
@media(min-width:900px){.plan-grid{grid-template-columns:1fr 1fr;gap:26px;}}
.plan{padding:26px;position:relative;display:flex;flex-direction:column;}
.plan-featured{border:2px solid var(--brand);box-shadow:var(--shadow-2);}
.plan-badge{
  position:absolute;top:-12px;left:24px;background:var(--amber);color:#4A2C00;
  font-size:12.5px;font-weight:700;padding:3px 12px;border-radius:999px;
}
.plan h3{font-size:20px;margin-bottom:6px;}
.plan .plan-sub{font-size:14px;color:var(--ink-2);margin-bottom:16px;}
.plan ul{list-style:none;margin:0 0 22px;padding:0;flex:1;}
.plan ul li{position:relative;padding-left:22px;font-size:15px;color:#33363A;margin-bottom:10px;}
.plan ul li::before{
  content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:999px;background:var(--teal);
}

/* testimonial wall */
.wall{display:grid;gap:16px;}
@media(min-width:700px){.wall{grid-template-columns:1fr 1fr;}}
@media(min-width:1024px){.wall{grid-template-columns:repeat(3,1fr);}}
.note{
  padding:18px;border-radius:12px;border:1px solid var(--line);background:#fff;
  box-shadow:var(--shadow-1);transform:rotate(-.5deg);transition:transform .2s ease,box-shadow .2s ease;
}
.note:nth-child(even){transform:rotate(.5deg);background:#FFFDF8;}
.note:hover{transform:rotate(0);box-shadow:var(--shadow-2);}
.note p{margin:10px 0 0;font-size:14.5px;color:var(--ink-2);}

/* concerns */
.concern-grid{display:grid;gap:26px;}
@media(min-width:900px){.concern-grid{grid-template-columns:1fr 1fr;gap:40px;}}
.qa-item{border-left:3px solid var(--teal);padding:2px 0 2px 16px;margin-bottom:20px;}
.qa-item h3{font-size:16.5px;margin-bottom:4px;}
.qa-item p{margin:0;font-size:14.5px;color:var(--ink-2);}

/* tag cloud */
.tagwall{display:flex;flex-wrap:wrap;gap:10px;}
.tagwall span{
  font-size:14px;padding:6px 15px;border-radius:999px;background:#fff;border:1px solid var(--line);
  color:var(--ink);transition:.2s ease;
}
.tagwall span:hover{border-color:var(--brand);color:var(--brand);background:#FBEFE9;}

/* cms list */
.cms-grid{display:grid;gap:20px;}
@media(min-width:700px){.cms-grid{grid-template-columns:1fr 1fr;}}
@media(min-width:1024px){.cms-grid{grid-template-columns:repeat(3,1fr);}}
.cms-card{display:flex;flex-direction:column;overflow:hidden;text-decoration:none;color:inherit;}
.cms-card:hover{color:inherit;}
.cms-thumb{aspect-ratio:16/9;width:100%;object-fit:cover;background:var(--bg-alt);}
.cms-body{padding:18px;display:flex;flex-direction:column;flex:1;}
.cms-body h3{font-size:17px;line-height:1.45;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.cms-body .excerpt{
  font-size:14px;color:var(--ink-2);margin:0 0 14px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.cms-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;font-size:13px;color:#8A8D92;}
.empty-state{padding:44px 20px;text-align:center;color:var(--ink-2);background:#fff;border:1px dashed var(--line);border-radius:var(--radius);grid-column:1/-1;}
.empty-state strong{display:block;color:var(--ink);font-size:16px;margin-bottom:6px;}

/* download */
.dl-grid{display:grid;gap:26px;align-items:center;}
@media(min-width:1024px){.dl-grid{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:44px;}}
.dl-buttons{display:grid;gap:12px;margin-top:22px;}
@media(min-width:640px){.dl-buttons{grid-template-columns:repeat(3,1fr);}}
.dl-btn{
  display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:12px;background:#fff;
  border:1px solid var(--line);text-decoration:none;color:var(--ink);box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.dl-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--brand);color:var(--brand);}
.dl-btn:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
.dl-btn .dl-ico{flex:0 0 30px;width:30px;height:30px;border-radius:8px;display:grid;place-items:center;background:#FBEFE9;color:var(--brand);font-size:12px;font-weight:700;}
.dl-btn strong{display:block;font-size:14.5px;line-height:1.3;}
.dl-btn small{display:block;font-size:12px;color:var(--ink-2);}
.dl-visual img{width:100%;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow-2);}

/* CTA band */
.cta-band{background:var(--brand);color:#fff;border-radius:16px;padding:36px 26px;display:grid;gap:22px;align-items:center;box-shadow:0 12px 30px rgba(217,82,59,.24);}
@media(min-width:900px){.cta-band{grid-template-columns:1fr auto;padding:44px 44px;}}
.cta-band h2{color:#fff;font-size:clamp(21px,2.5vw,28px);}
.cta-band p{color:rgba(255,255,255,.9);margin:10px 0 0;font-size:15.5px;}
.cta-band .btns{display:flex;flex-wrap:wrap;gap:12px;}
.cta-band .btn-primary{background:#fff;color:var(--brand);}
.cta-band .btn-primary:hover{background:#FBEFE9;color:var(--brand-active);}
.cta-band .btn-outline{background:transparent;border-color:rgba(255,255,255,.75);color:#fff;}
.cta-band .btn-outline:hover{background:#fff;color:var(--brand);}

/* faq */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:0;padding:18px 2px;text-align:left;font-size:16.5px;font-weight:600;
  color:var(--ink);cursor:pointer;min-height:44px;
}
.faq-q:hover{color:var(--brand);}
.faq-q:focus-visible{outline:2px solid var(--teal);outline-offset:-2px;}
.faq-q .arrow{flex:0 0 18px;transition:transform .2s ease;color:var(--teal);}
.faq-item.open .faq-q .arrow{transform:rotate(180deg);}
.faq-a{display:none;padding:0 0 18px 16px;border-left:3px solid var(--brand);margin-left:2px;}
.faq-item.open .faq-a{display:block;}
.faq-a p{margin:0;font-size:15px;color:var(--ink-2);}

/* footer */
.site-footer{background:#241F1C;color:#D8D2CB;padding:52px 0 26px;margin-top:0;}
.footer-grid{display:grid;gap:32px;}
@media(min-width:768px){.footer-grid{grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:28px;}}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:14px;}
.site-footer p{font-size:13.5px;color:#B3ACA4;line-height:1.8;}
.site-footer a{color:#D8D2CB;text-decoration:none;font-size:13.5px;transition:color .2s ease;}
.site-footer a:hover{color:#F0A83C;}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:9px;}
.footer-brand .brand-mark{background:var(--brand);}
.footer-brand .brand-text strong{color:#fff;}
.footer-brand .brand-text span{color:#B3ACA4;}
.footer-dl{display:grid;gap:9px;margin-top:2px;}
.footer-dl a{display:flex;align-items:center;gap:8px;font-size:13.5px;color:#D8D2CB;border:1px solid rgba(255,255,255,.14);border-radius:8px;padding:8px 12px;transition:.2s ease;}
.footer-dl a:hover{border-color:var(--amber);color:#F0A83C;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:18px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:#948D86;}

/* roulang page: category1 */
:root{
  --brand:#D9523B;
  --brand-hover:#B8422E;
  --brand-active:#9E3724;
  --teal:#1B7C6E;
  --teal-hover:#146357;
  --amber:#F0A83C;
  --bg:#FBF7F2;
  --bg-alt:#F5EFE6;
  --card:#FFFFFF;
  --line:#E9E1D6;
  --ink:#1F2124;
  --ink-2:#5C5F63;
  --radius:14px;
  --radius-sm:10px;
  --shadow-1:0 1px 2px rgba(31,33,36,.06);
  --shadow-2:0 8px 24px rgba(31,33,36,.09);
}
*,*::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:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16.5px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--teal);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;transition:color .2s ease;}
a:hover{color:var(--teal-hover);}
button{font-family:inherit;}
h1,h2,h3,h4{color:var(--ink);font-weight:700;line-height:1.35;margin:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (min-width:768px){.container{padding-left:24px;padding-right:24px;}}
.section{padding:48px 0;}
@media (min-width:768px){.section{padding:76px 0;}}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--brand);font-weight:600;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:5px 14px;letter-spacing:.5px;
}
.section-head{max-width:800px;margin-bottom:32px;}
.section-head p{color:var(--ink-2);font-size:16px;margin-top:12px;}
.sec-title{position:relative;padding-bottom:12px;font-size:clamp(22px,2.6vw,30px);}
.sec-title::after{
  content:"";position:absolute;left:0;bottom:0;width:56px;height:3px;border-radius:2px;background:var(--brand);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-sm);
  font-size:15.5px;font-weight:600;text-decoration:none;border:1px solid transparent;
  cursor:pointer;transition:background-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.btn:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-primary:active{background:var(--brand-active);}
.btn-outline{background:#fff;color:var(--teal);border-color:var(--teal);}
.btn-outline:hover{background:var(--teal);color:#fff;transform:translateY(-1px);}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-sm{min-height:36px;padding:0 14px;font-size:14px;border-radius:8px;}
.btn-block{width:100%;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;line-height:1.6;padding:3px 11px;border-radius:999px;
  border:1px solid var(--teal);color:var(--teal);background:#fff;text-decoration:none;
}
.tag-solid{background:var(--brand);border-color:var(--brand);color:#fff;}
.tag-soft{background:#FBEFE9;border-color:#F0CFC4;color:var(--brand-hover);}
.tag-amber{background:#FDF3E2;border-color:#F2D8AC;color:#A96A12;}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(217,82,59,.3);}
.img-round{border-radius:var(--radius-sm);border:1px solid var(--line);object-fit:cover;}
.divider{height:1px;background:var(--line);border:0;margin:0;}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:rgba(251,247,242,.96);backdrop-filter:blur(8px);border-bottom:1px solid transparent;transition:box-shadow .2s ease,border-color .2s ease;}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:var(--shadow-1);}
.brand-row{display:flex;align-items:center;gap:14px;padding-top:12px;padding-bottom:12px;}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0;}
.brand-mark{
  width:40px;height:40px;border-radius:11px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:17px;letter-spacing:.5px;
  box-shadow:0 4px 12px rgba(217,82,59,.28);
}
.brand-text strong{display:block;font-size:17.5px;font-weight:700;color:var(--ink);line-height:1.3;}
.brand-text span{display:block;font-size:12px;color:var(--ink-2);line-height:1.4;}
.brand-row-search{flex:1;display:none;max-width:360px;}
.search-box{position:relative;display:flex;align-items:center;}
.search-box input{
  width:100%;height:40px;border-radius:999px;border:1px solid var(--line);background:#fff;
  padding:0 16px 0 38px;font-size:14px;color:var(--ink);outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box input::placeholder{color:#9A9CA0;}
.search-box input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(27,124,110,.14);}
.search-box svg{position:absolute;left:13px;width:16px;height:16px;color:var(--ink-2);}
.brand-actions{display:flex;align-items:center;gap:8px;margin-left:auto;}
@media (min-width:900px){.brand-row-search{display:block;}}
@media (max-width:899px){.brand-text span{display:none;}}
/* channel tabs */
.channel-row{position:relative;padding-bottom:10px;}
.channel-scroll{
  display:flex;gap:8px;overflow-x:auto;padding:2px 2px 6px;
  scrollbar-width:none;-webkit-overflow-scrolling:touch;
}
.channel-scroll::-webkit-scrollbar{display:none;}
.channel-link{
  flex:0 0 auto;display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink-2);
  font-size:14px;font-weight:500;text-decoration:none;white-space:nowrap;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.channel-link:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.channel-link:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
.channel-link.active{background:var(--brand);border-color:var(--brand);color:#fff;}
.channel-link.active:hover{background:var(--brand-hover);color:#fff;}

/* category head */
.cat-head{
  position:relative;
  background:
    repeating-linear-gradient(0deg, rgba(31,33,36,.045) 0 1px, transparent 1px 30px),
    repeating-linear-gradient(90deg, rgba(31,33,36,.045) 0 1px, transparent 1px 30px),
    var(--bg-alt);
  border-bottom:1px solid var(--line);
  padding:24px 0 40px;
}
@media (min-width:768px){.cat-head{padding:30px 0 48px;}}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-2);}
.crumb a{color:var(--ink-2);text-decoration:none;}
.crumb a:hover{color:var(--brand);text-decoration:underline;}
.crumb .sep{color:#B9B2A8;}
.crumb .now{color:var(--brand);font-weight:600;}
.cat-head-grid{display:grid;gap:26px;margin-top:18px;align-items:start;}
@media (min-width:960px){.cat-head-grid{grid-template-columns:minmax(0,1.45fr) minmax(0,.85fr);gap:44px;align-items:center;}}
.cat-head h1{font-size:clamp(26px,3.6vw,38px);line-height:1.3;}
.cat-head h1 em{font-style:normal;color:var(--brand);}
.cat-head-lead{color:var(--ink-2);font-size:16px;margin-top:16px;max-width:660px;}
.cat-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px;}
.cat-facts{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;box-shadow:var(--shadow-1);
  display:grid;grid-template-columns:1fr 1fr;gap:12px;
}
@media (max-width:639px){.cat-facts{grid-template-columns:1fr;}}
.fact{padding:12px 14px;border-radius:var(--radius-sm);background:var(--bg-alt);border:1px solid var(--line);}
.fact strong{display:block;font-size:15.5px;color:var(--ink);}
.fact span{display:block;font-size:13px;color:var(--ink-2);margin-top:2px;}

/* filter pills */
.filter-bar{display:flex;gap:8px;overflow-x:auto;padding:6px 2px 10px;scrollbar-width:none;}
.filter-bar::-webkit-scrollbar{display:none;}
.filter-pill{
  flex:0 0 auto;display:inline-flex;align-items:center;height:34px;padding:0 15px;border-radius:999px;
  border:1px solid var(--line);background:#fff;color:var(--ink-2);font-size:13.5px;font-weight:500;
  text-decoration:none;white-space:nowrap;cursor:pointer;transition:all .2s ease;
}
.filter-pill:hover{border-color:var(--brand);color:var(--brand);}
.filter-pill:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
.filter-pill.is-on{background:var(--brand);border-color:var(--brand);color:#fff;}

/* post list */
.post-grid{display:grid;gap:20px;grid-template-columns:1fr;}
@media (min-width:760px){.post-grid{grid-template-columns:1fr 1fr;gap:22px;}}
.post-card{display:flex;flex-direction:column;padding:20px;}
.post-card .post-kicker{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:10px;}
.post-card h3{font-size:18.5px;line-height:1.45;margin-bottom:8px;}
.post-card h3 a{color:var(--ink);text-decoration:none;}
.post-card h3 a:hover{color:var(--brand);}
.post-card .post-excerpt{color:var(--ink-2);font-size:15px;line-height:1.75;}
.post-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);font-size:13px;color:var(--ink-2);}
.post-more{font-size:13.5px;font-weight:600;color:var(--brand);text-decoration:none;white-space:nowrap;}
.post-more:hover{color:var(--brand-hover);text-decoration:underline;}
.list-empty{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  padding:38px 20px;text-align:center;border:1px dashed var(--line);border-radius:var(--radius);
  background:#fff;color:var(--ink-2);font-size:15px;
}
.list-empty svg{width:34px;height:34px;color:var(--brand);}

/* checklist */
.check-grid{display:grid;gap:14px;grid-template-columns:1fr;}
@media (min-width:760px){.check-grid{grid-template-columns:1fr 1fr;}}
.check-item{display:flex;gap:12px;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);}
.check-item .ck{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:rgba(27,124,110,.12);
  color:var(--teal);display:grid;place-items:center;margin-top:2px;
}
.check-item .ck svg{width:13px;height:13px;}
.check-item h3{font-size:16px;margin-bottom:4px;}
.check-item p{font-size:14.5px;color:var(--ink-2);line-height:1.72;}

/* topic rows */
.topic-rows{display:grid;gap:16px;}
.topic-row{
  display:grid;grid-template-columns:1fr;gap:0;overflow:hidden;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
@media (min-width:700px){.topic-row{grid-template-columns:180px 1fr;}}
.topic-row:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(217,82,59,.3);}
.topic-row img{width:100%;height:150px;object-fit:cover;border:0;border-radius:0;}
@media (min-width:700px){.topic-row img{height:100%;min-height:140px;}}
.topic-body{padding:18px 20px;}
.topic-body h3{font-size:17.5px;margin-bottom:6px;}
.topic-body p{font-size:14.5px;color:var(--ink-2);line-height:1.72;}

/* timeline */
.timeline{position:relative;padding-left:26px;margin-top:8px;}
.timeline::before{
  content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(180deg,var(--brand),rgba(217,82,59,.15));
  border-radius:2px;
}
.tl-item{position:relative;padding:0 0 22px 0;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-24px;top:8px;width:12px;height:12px;border-radius:50%;
  background:#fff;border:3px solid var(--brand);box-shadow:0 0 0 3px rgba(217,82,59,.1);
}
.tl-item h3{font-size:16.5px;margin-bottom:4px;}
.tl-item p{font-size:14.5px;color:var(--ink-2);line-height:1.72;}
.tl-item .tl-num{font-size:12.5px;color:var(--amber);font-weight:700;letter-spacing:1px;}

/* faq */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:16px 2px;cursor:pointer;font-size:16.5px;font-weight:600;color:var(--ink);
  list-style:none;transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand);}
.faq-item summary:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
.faq-item summary .arw{
  flex:0 0 auto;width:22px;height:22px;display:grid;place-items:center;color:var(--ink-2);
  transition:transform .2s ease,color .2s ease;
}
.faq-item[open] summary .arw{transform:rotate(180deg);color:var(--brand);}
.faq-answer{
  padding:2px 0 18px 14px;border-left:3px solid var(--brand);
  font-size:15px;color:var(--ink-2);line-height:1.8;margin-left:2px;
}

/* download mini + related */
.split-panel{display:grid;gap:22px;grid-template-columns:1fr;}
@media (min-width:900px){.split-panel{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:30px;align-items:start;}}
.info-list li{display:flex;gap:10px;padding:12px 0;border-bottom:1px dashed var(--line);font-size:15px;color:var(--ink-2);line-height:1.72;}
.info-list li:last-child{border-bottom:0;}
.info-list li strong{color:var(--ink);font-weight:600;}
.dot{flex:0 0 auto;width:7px;height:7px;border-radius:50%;background:var(--brand);margin-top:11px;}
.dl-card{padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);}
.dl-card h3{font-size:18px;margin-bottom:6px;}
.dl-card p{font-size:14.5px;color:var(--ink-2);}
.dl-btns{display:grid;gap:10px;margin-top:16px;}
.dl-btn{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 16px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--bg);
  text-decoration:none;color:var(--ink);font-size:15px;font-weight:600;
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.dl-btn small{display:block;font-size:12.5px;font-weight:400;color:var(--ink-2);}
.dl-btn:hover{border-color:var(--brand);background:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2);color:var(--brand);}
.dl-btn:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
.dl-btn svg{width:18px;height:18px;color:var(--brand);flex:0 0 auto;}
.note-strip{
  margin-top:18px;padding:14px 16px;border-radius:var(--radius-sm);
  background:#FDF3E2;border:1px solid #F2D8AC;color:#8A5B12;font-size:14px;line-height:1.72;
}

/* footer */
.site-footer{background:#241F1C;color:#D9D2C9;padding:48px 0 22px;margin-top:0;}
@media (min-width:768px){.site-footer{padding:60px 0 24px;}}
.footer-grid{display:grid;gap:28px;grid-template-columns:1fr;}
@media (min-width:760px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;}}
.site-footer .brand-mark{background:var(--brand);}
.site-footer .brand-text strong{color:#fff;}
.site-footer .brand-text span{color:#A9A29A;}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:14px;font-weight:600;}
.site-footer p{font-size:14px;color:#B3ABA2;line-height:1.75;}
.footer-links li{margin-bottom:9px;}
.footer-links a{color:#C8C0B7;font-size:14px;text-decoration:none;}
.footer-links a:hover{color:var(--amber);text-decoration:underline;}
.footer-dl{display:grid;gap:8px;}
.footer-dl a{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 12px;border-radius:8px;border:1px solid #43392F;background:#2C2622;
  color:#E6DFD6;font-size:13.5px;text-decoration:none;transition:all .2s ease;
}
.footer-dl a:hover{border-color:var(--brand);color:#fff;background:#332B26;}
.footer-bottom{
  margin-top:34px;padding-top:18px;border-top:1px solid #3A332D;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:#8E877F;
}
[id]{scroll-margin-top:96px;}
@media (max-width:520px){
  body{font-size:16px;}
  .brand-actions .btn-outline{display:none;}
  .btn{width:100%;}
  .brand-actions{flex:0 0 auto;}
  .brand-actions .btn{width:auto;}
  .hero-cta .btn,.dl-btns .dl-btn{width:100%;}
}

/* roulang page: article */
:root{
  --brand:#D9523B;
  --brand-hover:#B8422E;
  --brand-active:#9E3724;
  --teal:#1B7C6E;
  --teal-hover:#146357;
  --amber:#F0A83C;
  --bg:#FBF7F2;
  --bg-alt:#F5EFE6;
  --card:#FFFFFF;
  --line:#E9E1D6;
  --ink:#1F2124;
  --ink-2:#5C5F63;
  --radius:14px;
  --radius-sm:10px;
  --shadow-1:0 1px 2px rgba(31,33,36,.06);
  --shadow-2:0 8px 24px rgba(31,33,36,.09);
}
*,*::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:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16.5px;
  line-height:1.8;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--teal);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;transition:color .2s ease;}
a:hover{color:var(--teal-hover);}
button{font-family:inherit;}
h1,h2,h3,h4{color:var(--ink);font-weight:700;letter-spacing:.2px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (min-width:768px){.container{padding-left:24px;padding-right:24px;}}
.section{padding:48px 0;}
@media (min-width:768px){.section{padding:72px 0;}}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--brand);font-weight:600;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:5px 14px;letter-spacing:.5px;
}
.sec-title{position:relative;padding-bottom:12px;margin:0;font-size:clamp(21px,2.6vw,28px);line-height:1.35;}
.sec-title::after{content:"";position:absolute;left:0;bottom:0;width:56px;height:3px;border-radius:2px;background:var(--brand);}
.section-head{max-width:780px;margin-bottom:28px;}
.section-head p{color:var(--ink-2);font-size:16px;margin:12px 0 0;}
.muted{color:var(--ink-2);font-size:14px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-sm);
  font-size:15.5px;font-weight:600;text-decoration:none;border:1px solid transparent;
  cursor:pointer;transition:background-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.btn:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--brand-hover);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-primary:active{background:var(--brand-active);}
.btn-outline{background:#fff;color:var(--teal);border-color:var(--teal);}
.btn-outline:hover{background:var(--teal);color:#fff;transform:translateY(-1px);}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-sm{min-height:36px;padding:0 14px;font-size:14px;border-radius:8px;}
.btn-block{width:100%;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;line-height:1.6;padding:3px 11px;border-radius:999px;
  border:1px solid var(--teal);color:var(--teal);background:#fff;text-decoration:none;
}
.tag-solid{background:var(--brand);border-color:var(--brand);color:#fff;}
.tag-soft{background:#FBEFE9;border-color:#F0CFC4;color:var(--brand-hover);}
.tag-amber{background:#FDF3E2;border-color:#F2D8AC;color:#A96A12;}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(217,82,59,.3);}
.divider{height:1px;background:var(--line);border:0;margin:0;}
/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:60;background:rgba(251,247,242,.96);backdrop-filter:blur(8px);border-bottom:1px solid transparent;transition:box-shadow .2s ease,border-color .2s ease;}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:var(--shadow-1);}
.brand-row{display:flex;align-items:center;gap:14px;padding:12px 0;flex-wrap:nowrap;}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0;}
.brand-mark{
  width:40px;height:40px;border-radius:11px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:17px;letter-spacing:.5px;
  box-shadow:0 4px 12px rgba(217,82,59,.28);flex-shrink:0;
}
.brand-text strong{display:block;font-size:17px;font-weight:700;color:var(--ink);line-height:1.3;}
.brand-text span{display:block;font-size:12px;color:var(--ink-2);line-height:1.4;}
.brand-row-search{flex:1 1 auto;min-width:0;display:none;max-width:380px;}
@media (min-width:900px){.brand-row-search{display:block;}}
.search-box{position:relative;display:flex;align-items:center;}
.search-box input{
  width:100%;height:40px;border-radius:999px;border:1px solid var(--line);background:#fff;
  padding:0 16px 0 38px;font-size:14px;color:var(--ink);outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box input::placeholder{color:#9A9CA0;}
.search-box input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(27,124,110,.14);}
.search-box svg{position:absolute;left:13px;width:16px;height:16px;color:var(--ink-2);}
.brand-actions{display:flex;align-items:center;gap:8px;margin-left:auto;flex-shrink:0;}
.channel-row{position:relative;padding-bottom:10px;}
.channel-scroll{
  display:flex;align-items:center;gap:8px;overflow-x:auto;padding:2px 0 4px;
  scrollbar-width:none;-ms-overflow-style:none;
}
.channel-scroll::-webkit-scrollbar{display:none;}
.channel-link{
  flex:0 0 auto;font-size:14px;line-height:1.6;padding:6px 14px;border-radius:999px;
  border:1px solid var(--line);background:#fff;color:var(--ink-2);text-decoration:none;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.channel-link:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.channel-link:focus-visible{outline:2px solid var(--teal);outline-offset:2px;}
.channel-link.active{background:var(--brand);border-color:var(--brand);color:#fff;}
.channel-link.active:hover{background:var(--brand-hover);color:#fff;}
/* ============ article head ============ */
.article-head{
  padding:30px 0 36px;border-bottom:1px solid var(--line);
  background:
    radial-gradient(circle at 1px 1px, rgba(31,33,36,.05) 1px, transparent 0) 0 0/22px 22px,
    var(--bg-alt);
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:7px;font-size:13px;color:var(--ink-2);line-height:1.6;}
.crumb a{color:var(--teal);text-decoration:none;}
.crumb a:hover{color:var(--teal-hover);text-decoration:underline;}
.crumb .sep{color:#B4B7BA;}
.crumb-current{color:var(--ink-2);}
.article-head h1{
  margin:16px 0 0;max-width:920px;
  font-size:clamp(25px,3.4vw,38px);line-height:1.32;font-weight:700;letter-spacing:.2px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;margin-top:18px;font-size:13.5px;color:var(--ink-2);}
.article-meta .dot{width:5px;height:5px;border-radius:50%;background:var(--amber);display:inline-block;}
.article-cover{margin:26px auto 0;max-width:1200px;}
.article-cover img{width:100%;border-radius:var(--radius-sm);border:1px solid var(--line);object-fit:cover;}
.article-cover figcaption{margin-top:10px;font-size:13px;color:var(--ink-2);line-height:1.6;}
/* ============ layout ============ */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px;align-items:start;}
@media (min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:48px;}
}
.article-col{min-width:0;}
/* ============ article body ============ */
.article-body{font-size:17px;line-height:1.85;color:var(--ink);max-width:760px;}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.15em;}
.article-body h2{
  position:relative;font-size:clamp(21px,2.4vw,25px);line-height:1.45;
  margin:2em 0 .7em;padding-bottom:.45em;border-bottom:1px solid var(--line);
}
.article-body h2::after{content:"";position:absolute;left:0;bottom:-1px;width:56px;height:3px;border-radius:2px;background:var(--brand);}
.article-body h3{font-size:19px;line-height:1.5;margin:1.7em 0 .6em;}
.article-body h4{font-size:17px;line-height:1.6;margin:1.4em 0 .5em;}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.35em;}
.article-body li{margin:.42em 0;}
.article-body li::marker{color:var(--brand);}
.article-body blockquote{
  margin:1.5em 0;padding:14px 18px;background:#fff;border-left:3px solid var(--teal);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--ink-2);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--radius-sm);border:1px solid var(--line);margin:1.4em auto;object-fit:cover;}
.article-body figure{margin:1.5em 0;}
.article-body figcaption{font-size:13px;color:var(--ink-2);text-align:center;margin-top:8px;}
.article-body a{color:var(--teal);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--teal-hover);}
.article-body strong{color:var(--ink);font-weight:700;}
.article-body code{background:#F3EDE4;border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:14px;}
.article-body pre{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px;overflow-x:auto;}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:1.3em 0;display:block;overflow-x:auto;white-space:nowrap;}
.article-body th,.article-body td{border:1px solid var(--line);padding:8px 12px;text-align:left;}
.article-body th{background:var(--bg-alt);font-weight:600;}
.article-body hr{border:0;height:1px;background:var(--line);margin:2em 0;}
/* ============ empty state ============ */
.empty-state{
  text-align:center;padding:48px 20px;background:#fff;border:1px dashed var(--line);
  border-radius:var(--radius);max-width:760px;
}
.empty-state svg{width:36px;height:36px;color:#C9BEB0;margin:0 auto 12px;}
.empty-state p{margin:0 0 16px;color:var(--ink-2);font-size:15.5px;}
/* ============ key points ============ */
.key-points{margin-top:38px;background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius);padding:22px 22px 18px;max-width:760px;}
.key-points h2{font-size:18px;margin:0 0 14px;display:flex;align-items:center;gap:8px;}
.key-points h2::before{content:"";width:6px;height:18px;border-radius:3px;background:var(--brand);display:inline-block;}
.key-points ul{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
.key-points li{position:relative;padding-left:26px;font-size:15px;line-height:1.75;color:var(--ink-2);}
.key-points li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;
  background:var(--amber);box-shadow:0 0 0 3px rgba(240,168,60,.18);
}
/* ============ related ============ */
.related{margin-top:38px;max-width:760px;}
.related h2{font-size:20px;margin:0 0 16px;}
.related-list{list-style:none;margin:0;padding:0;display:grid;gap:12px;}
.related-item{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 12px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:14px 16px;box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.related-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(217,82,59,.3);}
.related-item .related-title{font-size:15.5px;font-weight:600;color:var(--ink);text-decoration:none;line-height:1.6;}
.related-item .related-title:hover{color:var(--brand);}
/* ============ aside ============ */
.article-aside{display:grid;gap:18px;min-width:0;}
@media (min-width:1024px){.article-aside{position:sticky;top:108px;}}
.aside-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 18px 16px;box-shadow:var(--shadow-1);}
.aside-card h3{font-size:15.5px;margin:0 0 12px;display:flex;align-items:center;gap:8px;}
.aside-card h3 span{width:6px;height:16px;border-radius:3px;background:var(--teal);display:inline-block;}
.aside-card ul{list-style:none;margin:0;padding:0;display:grid;gap:9px;}
.aside-card li{font-size:14px;line-height:1.7;color:var(--ink-2);padding-left:16px;position:relative;}
.aside-card li::before{content:"";position:absolute;left:0;top:8px;width:6px;height:6px;border-radius:50%;background:var(--brand);}
.aside-dl{display:grid;gap:8px;}
.aside-dl a{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  font-size:14px;padding:9px 12px;border:1px solid var(--line);border-radius:8px;
  background:var(--bg);color:var(--ink);text-decoration:none;
  transition:background-color .2s ease,border-color .2s ease,color .2s ease,transform .2s ease;
}
.aside-dl a:hover{background:#fff;border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.aside-dl a .dl-name{font-weight:600;}
.aside-dl a .dl-file{font-size:12px;color:var(--ink-2);}
.aside-note{font-size:12.5px;line-height:1.7;color:var(--ink-2);margin:12px 0 0;}
/* ============ cta band ============ */
.cta-wrap{padding:0 0 64px;}
.cta-band{
  background:var(--brand);color:#fff;border-radius:16px;padding:30px 24px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  box-shadow:0 12px 30px rgba(217,82,59,.22);
  background-image:radial-gradient(circle at 1px 1px, rgba(255,255,255,.16) 1px, transparent 0);
  background-size:20px 20px;
}
.cta-band h2{color:#fff;font-size:clamp(19px,2.4vw,24px);line-height:1.4;margin:0 0 8px;}
.cta-band p{color:rgba(255,255,255,.9);margin:0;font-size:14.5px;line-height:1.7;}
.cta-actions{display:flex;flex-wrap:wrap;gap:10px;}
.cta-band .btn-primary{background:#fff;color:var(--brand);}
.cta-band .btn-primary:hover{background:#FFF4EF;color:var(--brand-hover);}
.cta-band .btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.75);}
.cta-band .btn-outline:hover{background:#fff;color:var(--brand);border-color:#fff;}
@media (max-width:639px){
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
}
/* ============ footer ============ */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:46px 0 22px;}
.footer-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:28px;}
@media (min-width:768px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;}}
.site-footer p{font-size:13.5px;line-height:1.75;color:var(--ink-2);margin:0;}
.site-footer h4{font-size:14px;font-weight:700;color:var(--ink);margin:0 0 12px;letter-spacing:.3px;}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:8px;}
.footer-links a{font-size:14px;color:var(--ink-2);text-decoration:none;transition:color .2s ease;}
.footer-links a:hover{color:var(--brand);}
.footer-dl{display:grid;gap:8px;}
.footer-dl a{
  display:block;font-size:13.5px;padding:8px 12px;border:1px solid var(--line);border-radius:8px;
  background:var(--bg);color:var(--ink);text-decoration:none;
  transition:background-color .2s ease,border-color .2s ease,color .2s ease,transform .2s ease;
}
.footer-dl a:hover{background:#fff;border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.footer-bottom{
  margin-top:30px;padding-top:16px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
  font-size:13px;color:var(--ink-2);
}
@media (max-width:519px){
  body{font-size:16px;}
  .brand-text span{display:none;}
  .brand-mark{width:36px;height:36px;font-size:15px;border-radius:10px;}
  .brand-actions .btn{padding:0 12px;font-size:13px;}
  .article-head{padding:22px 0 28px;}
  .cta-band{padding:24px 18px;}
}