/* roulang page: index */
:root{
  --brand-600:#6D28D9;
  --brand-700:#5B21B6;
  --brand-500:#7C3AED;
  --brand-50:#F5F3FF;
  --brand-100:#EDE9FE;
  --brand-200:#DDD6FE;
  --accent-400:#A3E635;
  --ink-900:#17102B;
  --ink-700:#3A3350;
  --ink-500:#6B6480;
  --line:#E7E3F1;
  --page:#FBFAFD;
  --card:#FFFFFF;
  --r-card:16px;
  --r-btn:10px;
  --r-img:14px;
  --shadow-1:0 1px 2px rgba(23,16,43,.05);
  --shadow-2:0 14px 34px -14px rgba(23,16,43,.22);
  --shadow-brand:0 10px 24px -10px rgba(109,40,217,.5);
  --header-h:56px;
}
@media (min-width:1024px){ :root{ --header-h:64px; } }

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:88px;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  padding-top:var(--header-h);
  background:var(--page);
  color:var(--ink-900);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .2s;}
a:hover{color:var(--brand-700);text-decoration:underline;text-underline-offset:3px;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:none;background:none;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (min-width:768px){ .wrap{padding-left:24px;padding-right:24px;} }
@media (min-width:1024px){ .wrap{padding-left:32px;padding-right:32px;} }

.section{padding:56px 0;}
@media (min-width:768px){ .section{padding:80px 0;} }
@media (min-width:1024px){ .section{padding:104px 0;} }

.h1{font-size:clamp(30px,5vw,52px);line-height:1.18;font-weight:800;letter-spacing:-.01em;}
.h2{font-size:clamp(24px,3.4vw,36px);line-height:1.25;font-weight:800;}
.lead{font-size:16px;line-height:1.85;color:var(--ink-700);}
.muted{font-size:14px;line-height:1.6;color:var(--ink-500);}
.tabnum{font-variant-numeric:tabular-nums;}

/* ============ header ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(251,250,253,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:0 10px 30px -22px rgba(23,16,43,.5);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:26px;height:26px;border-radius:8px;flex:0 0 26px;
  background:linear-gradient(135deg,var(--brand-500),var(--accent-400));
  box-shadow:0 6px 16px -8px rgba(109,40,217,.7);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:8px;border-radius:3px;
  background:rgba(255,255,255,.92);
  clip-path:polygon(0 0,100% 0,100% 100%);
}
.brand-name{font-size:17px;font-weight:800;color:var(--ink-900);letter-spacing:.01em;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:var(--header-h);
  padding:0 14px;font-size:15px;font-weight:600;color:var(--ink-700);
  text-decoration:none;transition:color .2s ease;
}
.nav-link:hover{color:var(--brand-600);text-decoration:none;}
.nav-link.active{color:var(--brand-600);}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:16px;height:2px;border-radius:2px;
  background:var(--brand-600);
}
.icon-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink-700);
  transition:.2s ease;flex:0 0 40px;
}
.icon-btn:hover{color:var(--brand-600);border-color:var(--brand-200);background:var(--brand-50);}
.icon-btn:active{transform:scale(.96);}
.hamburger{
  width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:#fff;
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-700);transition:.25s;}
.hamburger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.hamburger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.mobile-panel{
  display:none;position:fixed;left:0;right:0;top:var(--header-h);z-index:55;
  background:#fff;border-bottom:1px solid var(--line);
  box-shadow:0 24px 40px -30px rgba(23,16,43,.6);
  padding:12px 20px 22px;
}
.mobile-panel.open{display:block;animation:dropIn .24s ease;}
@keyframes dropIn{from{opacity:0;transform:translateY(-8px);}to{opacity:1;transform:none;}}
.mobile-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 4px;font-size:16px;font-weight:600;color:var(--ink-700);
  border-bottom:1px solid var(--line);text-decoration:none;
}
.mobile-link:hover{color:var(--brand-600);text-decoration:none;}
.mobile-link.active{color:var(--brand-600);}
.mobile-link span{color:var(--brand-500);font-size:18px;}

.search-panel{
  position:absolute;right:0;top:calc(100% + 10px);width:290px;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow-2);padding:14px;
  opacity:0;visibility:hidden;transform:translateY(-6px);transition:.22s ease;
}
.search-panel.open{opacity:1;visibility:visible;transform:none;}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;text-decoration:none;
  border:1px solid transparent;transition:.22s ease;white-space:nowrap;
}
.btn:hover{text-decoration:none;}
.btn:active{transform:scale(.98);}
.btn-primary{background:linear-gradient(135deg,var(--brand-500),var(--brand-700));color:#fff;box-shadow:var(--shadow-brand);}
.btn-primary:hover{color:#fff;transform:translateY(-1px);box-shadow:0 16px 30px -12px rgba(109,40,217,.6);}
.btn-ghost{background:#fff;border-color:#D8D2EA;color:var(--brand-700);}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-600);background:var(--brand-50);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--brand-600);text-decoration:none;
}
.btn-link .arw{transition:transform .22s ease;}
.btn-link:hover{color:var(--brand-700);text-decoration:none;}
.btn-link:hover .arw{transform:translateX(3px);}

/* ============ hero ============ */
.hero{position:relative;overflow:hidden;padding:44px 0 64px;}
@media (min-width:1024px){ .hero{padding:72px 0 96px;} }
.hero::before{
  content:"";position:absolute;top:-160px;left:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(124,58,237,.16),transparent 65%);pointer-events:none;
}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:30px;padding:0 12px;border-radius:999px;
  background:var(--brand-50);border:1px solid var(--brand-100);
  font-size:13px;font-weight:600;color:var(--brand-700);white-space:nowrap;
}
.badge-dot{width:6px;height:6px;border-radius:50%;background:var(--accent-400);flex:0 0 6px;}
.hero-visual{position:relative;border-radius:20px;overflow:hidden;box-shadow:var(--shadow-2);}
.hero-visual img{width:100%;height:250px;object-fit:cover;}
@media (min-width:640px){ .hero-visual img{height:330px;} }
@media (min-width:1024px){ .hero-visual img{height:460px;} }
.hero-visual::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(90deg,rgba(124,58,237,.5),rgba(124,58,237,.1) 52%,rgba(124,58,237,0));
}
.hero-float-card{
  position:absolute;right:14px;bottom:14px;width:212px;
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:15px 17px;box-shadow:0 20px 44px -24px rgba(23,16,43,.55);
}
.live-dot{width:8px;height:8px;border-radius:50%;background:var(--accent-400);box-shadow:0 0 0 4px rgba(163,230,53,.22);flex:0 0 8px;}

/* ============ pain cards ============ */
.pain-card{
  position:relative;background:var(--card);border:1px solid var(--line);border-left:3px solid var(--brand-600);
  border-radius:var(--r-card);padding:22px 24px;box-shadow:var(--shadow-1);transition:.25s ease;
}
.pain-card:hover{transform:translateY(-2px);border-color:var(--brand-200);border-left-color:var(--brand-500);box-shadow:var(--shadow-2);}
.pain-idx{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:9px;background:var(--brand-50);color:var(--brand-700);
  font-size:13px;font-weight:800;margin-bottom:12px;font-variant-numeric:tabular-nums;
}

/* ============ solution ============ */
.solution-main{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-1);transition:.25s ease;height:100%;
  display:flex;flex-direction:column;
}
.solution-main:hover{transform:translateY(-2px);border-color:#C4B5FD;box-shadow:var(--shadow-2);}
.solution-main img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.tick-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;line-height:1.75;color:var(--ink-700);}
.tick-list li + li{margin-top:10px;}
.tick-list .tk{
  flex:0 0 20px;width:20px;height:20px;border-radius:50%;margin-top:3px;
  background:var(--brand-100);color:var(--brand-700);
  display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;
}
.narrow-card{
  display:flex;flex-direction:column;justify-content:center;gap:8px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 24px;box-shadow:var(--shadow-1);transition:.25s ease;text-decoration:none;
}
.narrow-card:hover{transform:translateY(-2px);border-color:#C4B5FD;box-shadow:var(--shadow-2);text-decoration:none;}
.narrow-num{
  font-size:26px;font-weight:800;color:var(--brand-200);line-height:1;
  font-variant-numeric:tabular-nums;
}
.narrow-card:hover .narrow-num{color:var(--brand-500);}

/* ============ stats ============ */
.stats-band{position:relative;background:var(--ink-900);color:#fff;overflow:hidden;padding:56px 0;}
@media (min-width:1024px){ .stats-band{padding:76px 0;} }
.stats-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(circle at 12% 18%,rgba(109,40,217,.55),transparent 55%),
             radial-gradient(circle at 88% 84%,rgba(163,230,53,.14),transparent 52%);
}
.stats-grid{position:relative;display:grid;grid-template-columns:repeat(2,1fr);}
.stat{padding:24px 16px;border-top:1px solid rgba(255,255,255,.12);}
.stat:nth-child(-n+2){border-top:none;}
@media (min-width:1024px){
  .stats-grid{grid-template-columns:repeat(4,1fr);}
  .stat{border-top:none;border-left:1px solid rgba(255,255,255,.12);padding:8px 22px;}
  .stat:first-child{border-left:none;padding-left:0;}
}
.stat-num{
  font-size:clamp(32px,4.6vw,52px);font-weight:800;line-height:1.1;
  color:var(--accent-400);font-variant-numeric:tabular-nums;letter-spacing:-.01em;
}
.stat-label{margin-top:8px;font-size:14px;color:#C7C2D9;}

/* ============ info cards ============ */
.info-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-1);transition:.25s ease;text-decoration:none;
}
.info-card:hover{transform:translateY(-2px);border-color:#C4B5FD;box-shadow:var(--shadow-2);text-decoration:none;}
.info-cover{aspect-ratio:16/9;overflow:hidden;background:var(--brand-50);}
.info-cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease;}
.info-card:hover .info-cover img{transform:scale(1.04);}
.info-body{padding:18px 20px 0;flex:1 1 auto;}
.info-foot{padding:14px 20px 18px;margin-top:16px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px;}
.cat-badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:var(--brand-50);color:var(--brand-700);font-size:12px;font-weight:700;
}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.empty-state{
  border:1px dashed var(--brand-200);border-radius:var(--r-card);background:#fff;
  padding:40px 24px;text-align:center;
}

/* ============ faq ============ */
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0;text-align:left;font-size:17px;font-weight:700;color:var(--ink-900);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--brand-600);}
.faq-q[aria-expanded="true"]{color:var(--brand-600);}
.faq-icon{
  position:relative;flex:0 0 28px;width:28px;height:28px;border-radius:50%;
  background:var(--brand-50);transition:background .25s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-600);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:12px;height:2px;}
.faq-icon::after{width:2px;height:12px;transition:transform .25s ease;}
.faq-item.open .faq-icon{background:var(--brand-100);}
.faq-item.open .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease;}
.faq-item.open .faq-a{max-height:340px;}
.faq-a p{padding:0 44px 20px 0;font-size:15px;line-height:1.9;color:var(--ink-700);}

/* ============ cta band ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:24px;padding:44px 32px;
  background:linear-gradient(120deg,#4C1D95,#6D28D9 58%,#7C3AED);
  color:#fff;box-shadow:0 30px 60px -34px rgba(76,29,149,.7);
}
.cta-band::after{
  content:"";position:absolute;right:-60px;bottom:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(163,230,53,.32),transparent 68%);
}
@media (min-width:768px){ .cta-band{padding:56px 48px;} }

/* ============ footer ============ */
.site-footer{background:var(--ink-900);color:#C7C2D9;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px;padding:56px 0 40px;}
@media (min-width:640px){ .footer-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding:68px 0 48px;} }
.footer-title{color:#fff;font-size:15px;font-weight:700;margin-bottom:14px;}
.footer-link{display:block;font-size:14px;line-height:2.1;color:#C7C2D9;text-decoration:none;}
.footer-link:hover{color:#fff;text-decoration:none;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:18px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center;justify-content:space-between;
  font-size:13px;color:#8F89A6;
}
.footer-bottom a{color:#8F89A6;}
.footer-bottom a:hover{color:#fff;}

/* ============ modal ============ */
.modal{position:fixed;inset:0;z-index:90;display:none;}
.modal.open{display:block;}
.modal-backdrop{position:absolute;inset:0;background:rgba(23,16,43,.55);animation:fadeIn .25s ease;}
@keyframes fadeIn{from{opacity:0;}to{opacity:1;}}
.modal-panel{
  position:absolute;right:0;top:0;bottom:0;width:480px;max-width:100%;
  background:#fff;padding:28px 26px;overflow-y:auto;
  box-shadow:-24px 0 60px -30px rgba(23,16,43,.6);
  animation:slideIn .3s ease;
}
@keyframes slideIn{from{transform:translateX(48px);opacity:.5;}to{transform:none;opacity:1;}}
@media (max-width:767px){
  .modal-panel{
    top:auto;left:0;right:0;bottom:0;width:100%;height:92%;
    border-radius:20px 20px 0 0;animation:slideUp .3s ease;
  }
  @keyframes slideUp{from{transform:translateY(48px);opacity:.5;}to{transform:none;opacity:1;}}
}
.field{display:block;margin-bottom:16px;}
.field-label{display:block;font-size:14px;font-weight:600;color:var(--ink-700);margin-bottom:7px;}
.field-input{
  width:100%;height:46px;padding:0 14px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:#fff;font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
textarea.field-input{height:auto;padding:12px 14px;line-height:1.7;resize:vertical;}
.field-input:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(109,40,217,.14);}
.field-input::placeholder{color:#A9A3BC;}
.check-row{display:flex;gap:10px;align-items:flex-start;font-size:13px;line-height:1.7;color:var(--ink-500);}
.check-row input{margin-top:4px;accent-color:var(--brand-600);width:16px;height:16px;flex:0 0 16px;}

@media (max-width:520px){
  .h1{font-size:28px;}
  .btn{height:44px;padding:0 18px;font-size:14px;}
  .cta-band{padding:36px 20px;border-radius:18px;}
}

/* roulang page: article */
:root{
  --brand-600:#6D28D9;
  --brand-700:#5B21B6;
  --brand-400:#7C3AED;
  --brand-50:#F5F3FF;
  --brand-100:#EDE9FE;
  --accent-400:#A3E635;
  --ink-900:#17102B;
  --ink-700:#3A3350;
  --ink-500:#6B6480;
  --line:#E7E3F1;
  --page:#FBFAFD;
  --card:#FFFFFF;
  --radius-card:16px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(23,16,43,.05);
  --shadow-hover:0 14px 34px -14px rgba(23,16,43,.22);
  --shadow-btn:0 10px 24px -10px rgba(109,40,217,.5);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  color:var(--ink-700);
  background:var(--page);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none}
a:hover{color:var(--brand-700)}
button{font:inherit;cursor:pointer}
input,select,textarea{font:inherit}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.wrap{padding:0 24px}}
@media(min-width:1024px){.wrap{padding:0 32px}}
.section{padding:56px 0}
@media(min-width:768px){.section{padding:80px 0}}
@media(min-width:1024px){.section{padding:104px 0}}
.nums{font-variant-numeric:tabular-nums}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(251,250,253,.92);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:0 8px 24px -18px rgba(23,16,43,.35)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:56px}
@media(min-width:1024px){.header-inner{height:64px}}
.brand{display:inline-flex;align-items:center;gap:9px;color:var(--ink-900);font-weight:800;font-size:17px;letter-spacing:.01em}
.brand:hover{color:var(--ink-900)}
.brand-mark{
  width:22px;height:22px;flex:0 0 22px;border-radius:6px;
  background:linear-gradient(45deg,var(--brand-600),var(--accent-400));
  box-shadow:0 6px 14px -8px rgba(109,40,217,.7);
}
.nav-link{
  position:relative;display:inline-block;padding:6px 12px;margin:0 2px;
  font-size:15px;font-weight:500;color:var(--ink-700);
  border-radius:8px;transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--brand-600);background:var(--brand-50)}
.nav-link.active{color:var(--brand-600);font-weight:700}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;
  background:var(--brand-600);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:10px}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:10px;border:1.5px solid #D8D2EA;
  background:#fff;color:var(--ink-700);transition:all .2s ease;
}
.icon-btn:hover{border-color:#C4B5FD;color:var(--brand-600);transform:translateY(-1px)}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-btn);border:0;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-400));
  color:#fff;font-size:15px;font-weight:600;box-shadow:var(--shadow-btn);
  transition:transform .18s ease,box-shadow .25s ease,filter .2s ease;
}
.btn-main:hover{color:#fff;transform:translateY(-1px);filter:brightness(1.05)}
.btn-main:active{transform:translateY(0) scale(.98)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border-radius:var(--radius-btn);
  border:1.5px solid #D8D2EA;background:#fff;color:var(--brand-700);
  font-size:15px;font-weight:600;transition:all .2s ease;
}
.btn-ghost:hover{border-color:#C4B5FD;background:var(--brand-50);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0) scale(.98)}
.menu-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:10px;border:1.5px solid #D8D2EA;background:#fff;color:var(--ink-900);
}
@media(min-width:1024px){.menu-btn{display:none}}
.mobile-panel{display:none;border-top:1px solid var(--line);background:#fff;padding:12px 20px 20px}
.mobile-panel.open{display:block}
.mobile-panel a{
  display:block;padding:13px 4px;min-height:44px;font-size:16px;color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.mobile-panel a:last-of-type{border-bottom:0}
.mobile-panel .btn-main{width:100%;margin-top:14px;padding:13px 20px}

/* 文章头部 */
.article-banner{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#F5F3FF 0%,#FBFAFD 100%);
  border-bottom:1px solid var(--line);
}
.article-banner::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.16;pointer-events:none;
}
.article-banner .wrap{position:relative;z-index:1;padding-top:28px;padding-bottom:34px}
@media(min-width:1024px){.article-banner .wrap{padding-top:40px;padding-bottom:46px}}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-500)}
.crumb a{color:var(--ink-500)}
.crumb a:hover{color:var(--brand-600)}
.crumb .sep{color:#C9C3DC}
.crumb .now{color:var(--ink-700);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@media(max-width:640px){.crumb .now{white-space:normal}}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);
  font-size:12.5px;font-weight:700;color:var(--brand-700);letter-spacing:.02em;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent-400)}
h1.article-title{
  margin:16px 0 0;
  font-size:clamp(26px,4.2vw,42px);
  line-height:1.22;font-weight:800;color:var(--ink-900);
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  margin-top:18px;font-size:13.5px;color:var(--ink-500);
}
.meta-row .chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);
  font-weight:600;font-size:12.5px;
}
.meta-row .chip a{color:var(--brand-700)}

/* 正文 */
.article-shell{padding:40px 0 0}
@media(min-width:768px){.article-shell{padding:52px 0 0}}
.article-card{
  max-width:760px;margin:0 auto;background:var(--card);
  border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-card);
  padding:26px 20px 34px;
}
@media(min-width:768px){.article-card{padding:40px 44px 46px}}
.article-body{font-size:17px;line-height:1.95;color:var(--ink-700)}
.article-body > p{margin:0 0 1.25em}
.article-body > p:first-of-type{font-size:18px;color:var(--ink-900);line-height:1.9}
.article-body h2{
  margin:1.6em 0 .8em;font-size:clamp(20px,2.6vw,25px);line-height:1.35;font-weight:800;color:var(--ink-900);
}
.article-body h3{margin:1.4em 0 .7em;font-size:19px;line-height:1.4;font-weight:700;color:var(--ink-900)}
.article-body h4{margin:1.3em 0 .6em;font-size:17px;font-weight:700;color:var(--ink-900)}
.article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--brand-700)}
.article-body strong{color:var(--ink-900);font-weight:700}
.article-body ul,.article-body ol{margin:0 0 1.25em;padding-left:1.4em}
.article-body li{margin:.4em 0}
.article-body blockquote{
  margin:1.4em 0;padding:14px 18px;border-left:4px solid var(--brand-600);
  background:var(--brand-50);border-radius:0 12px 12px 0;color:var(--ink-700);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius-img);margin:1.5em auto}
.article-body figure{margin:1.5em 0}
.article-body figcaption{font-size:13.5px;color:var(--ink-500);text-align:center;margin-top:8px}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15px;
  border:1px solid var(--line);border-radius:12px;overflow:hidden;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body th{background:var(--brand-50);color:var(--ink-900);font-weight:700}
.article-body pre{
  background:var(--ink-900);color:var(--brand-100);padding:16px 18px;border-radius:12px;
  overflow-x:auto;font-size:14px;line-height:1.8;margin:1.4em 0;
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.empty-state{text-align:center;padding:34px 6px}
.empty-state h2{margin:0 0 10px;font-size:22px;font-weight:800;color:var(--ink-900)}
.empty-state p{margin:0 0 20px;color:var(--ink-500);font-size:15px}

/* 标签 */
.tag-row{max-width:760px;margin:20px auto 0;display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;padding:6px 13px;border-radius:999px;
  background:#fff;border:1px solid var(--line);font-size:13px;color:var(--ink-500);
}
.tag:hover{border-color:#C4B5FD;color:var(--brand-600)}

/* 相关推荐 */
.rec-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:26px}
@media(min-width:768px){.rec-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.rec-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.rec-card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .22s ease,box-shadow .25s ease,border-color .22s ease;
}
.rec-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#C4B5FD}
.rec-card .thumb{aspect-ratio:16/9;width:100%;object-fit:cover}
.rec-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.rec-card h3{margin:0;font-size:17px;line-height:1.45;font-weight:700;color:var(--ink-900)}
.rec-card .desc{margin:0;font-size:14px;line-height:1.8;color:var(--ink-500)}
.rec-card .foot{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-500);
}
.rec-card .foot .more{color:var(--brand-600);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.rec-card .foot .more .arw{transition:transform .2s ease}
.rec-card:hover .foot .more .arw{transform:translateX(3px)}
.badge-cat{
  display:inline-flex;align-items:center;align-self:flex-start;
  padding:3px 10px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);
  font-size:12px;font-weight:700;
}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px}
.sec-head h2{margin:0;font-size:clamp(22px,3vw,30px);line-height:1.3;font-weight:800;color:var(--ink-900)}
.sec-head .link-more{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px}
.sec-head .link-more .arw{transition:transform .2s ease}
.sec-head .link-more:hover .arw{transform:translateX(3px)}

/* CTA 条 */
.cta-band{
  background:var(--ink-900);border-radius:20px;padding:32px 24px;position:relative;overflow:hidden;
}
@media(min-width:768px){.cta-band{padding:44px 46px}}
.cta-band::after{
  content:"";position:absolute;right:-70px;top:-70px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(109,40,217,.55),transparent 68%);
}
.cta-band .inner{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between}
.cta-band h2{margin:0 0 8px;font-size:clamp(21px,2.9vw,28px);font-weight:800;color:#fff;line-height:1.35}
.cta-band p{margin:0;font-size:15px;color:#C7C2D9;max-width:620px}
.cta-band .actions{display:flex;flex-wrap:wrap;gap:12px}
.btn-light{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 22px;border-radius:var(--radius-btn);border:0;
  background:var(--accent-400);color:#17102B;font-size:15px;font-weight:700;
  transition:transform .18s ease,filter .2s ease;
}
.btn-light:hover{color:#17102B;filter:brightness(1.06);transform:translateY(-1px)}
.btn-line{
  display:inline-flex;align-items:center;justify-content:center;
  padding:11px 20px;border-radius:var(--radius-btn);
  border:1.5px solid rgba(255,255,255,.34);color:#fff;font-size:15px;font-weight:600;
  transition:all .2s ease;
}
.btn-line:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}

/* 页脚 */
.site-footer{background:var(--ink-900);color:#C7C2D9;margin-top:64px}
.site-footer .wrap{padding-top:52px;padding-bottom:26px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);gap:36px}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.footer-title{font-size:14px;font-weight:700;color:#fff;margin:0 0 14px;letter-spacing:.02em}
.footer-link{display:block;font-size:14px;line-height:1.9;color:#C7C2D9;padding:3px 0}
.footer-link:hover{color:#fff}
.footer-bottom{
  margin-top:36px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:12.5px;color:#8F89A6;line-height:1.8;
}
.footer-bottom span{max-width:760px}
@media (prefers-reduced-motion: reduce){
  *{transition:none !important;animation:none !important}
}

/* roulang page: category2 */
:root{
  --brand-600:#6D28D9;
  --brand-700:#5B21B6;
  --brand-500:#7C3AED;
  --brand-50:#F5F3FF;
  --brand-100:#EDE9FE;
  --accent-400:#A3E635;
  --ink-900:#17102B;
  --ink-700:#3A3350;
  --ink-500:#6B6480;
  --line:#E7E3F1;
  --bg:#FBFAFD;
  --card:#FFFFFF;
  --radius-card:16px;
  --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(23,16,43,.05);
  --shadow-2:0 14px 34px -14px rgba(23,16,43,.22);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-700);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:14px;}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-700);}
button{font-family:inherit;}
h1,h2,h3,h4,p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}

.wrap{max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;width:100%;}
@media(min-width:768px){.wrap{padding-left:24px;padding-right:24px;}}
@media(min-width:1024px){.wrap{padding-left:32px;padding-right:32px;}}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(251,250,253,.94);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.scrolled{box-shadow:0 6px 22px -16px rgba(23,16,43,.35);}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;min-height:64px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:26px;height:26px;display:inline-block;flex-shrink:0;
  background:linear-gradient(45deg,var(--brand-600),var(--accent-400));
  clip-path:polygon(22% 0,100% 0,100% 78%,78% 100%,0 100%,0 22%);
}
.brand-text{font-size:17px;font-weight:800;color:var(--ink-900);letter-spacing:.01em;}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 14px;font-size:15px;font-weight:600;color:var(--ink-700);
  border-radius:8px;transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--brand-700);background:var(--brand-50);}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--brand-600);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-link.active{color:var(--brand-600);}
.nav-link.active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:10px;}

.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border:none;cursor:pointer;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;color:#fff;line-height:1.2;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-600));
  box-shadow:0 10px 24px -10px rgba(109,40,217,.5);
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease;
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 14px 30px -12px rgba(109,40,217,.62);color:#fff;}
.btn-primary:active{transform:translateY(1px) scale(.98);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-btn);
  border:1.5px solid #D8D2EA;background:#fff;
  color:var(--brand-700);font-size:15px;font-weight:600;line-height:1.2;
  transition:border-color .18s ease,background .18s ease,transform .18s ease;
}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--brand-50);color:var(--brand-700);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(1px) scale(.98);}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--brand-600);
}
.text-link .arw{transition:transform .18s ease;}
.text-link:hover{color:var(--brand-700);text-decoration:underline;text-underline-offset:3px;}
.text-link:hover .arw{transform:translateX(3px);}

.menu-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:10px;border:1.5px solid var(--line);
  background:#fff;color:var(--ink-900);cursor:pointer;
}
.menu-toggle:hover{border-color:#C4B5FD;background:var(--brand-50);}
@media(min-width:1024px){.menu-toggle{display:none;}}
.mobile-panel{
  display:none;border-top:1px solid var(--line);background:#fff;
}
.mobile-panel.open{display:block;}
.mobile-panel .m-link{
  display:block;padding:14px 0;font-size:16px;font-weight:600;color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.mobile-panel .m-link.active{color:var(--brand-600);}
.mobile-panel .m-link:hover{color:var(--brand-700);}

/* ============ hero ============ */
.cat-hero{
  background:linear-gradient(180deg,var(--brand-50) 0%,#FBFAFD 100%);
  border-bottom:1px solid var(--line);
  padding:38px 0 40px;
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);}
.crumb a{color:var(--ink-500);}
.crumb a:hover{color:var(--brand-600);}
.crumb .sep{color:#BFB8D4;}
.crumb .cur{color:var(--ink-700);font-weight:600;}
.cat-hero h1{
  margin-top:16px;
  font-size:clamp(30px,5vw,46px);line-height:1.18;font-weight:800;color:var(--ink-900);
  letter-spacing:.01em;
}
.cat-hero .lead{margin-top:14px;font-size:17px;line-height:1.8;color:var(--ink-500);max-width:680px;}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:22px;
  font-size:13.5px;color:var(--ink-500);
}
.hero-stats span{display:inline-flex;align-items:center;gap:8px;}
.dot{width:7px;height:7px;border-radius:50%;background:var(--accent-400);display:inline-block;}

/* ============ anchor bar ============ */
.anchor-bar{
  position:sticky;top:64px;z-index:40;
  background:rgba(255,255,255,.95);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(160%) blur(6px);
}
.anchor-scroll{
  display:flex;gap:8px;overflow-x:auto;padding:12px 0;
  scrollbar-width:none;
}
.anchor-scroll::-webkit-scrollbar{display:none;}
.anchor-chip{
  flex:0 0 auto;padding:7px 15px;border-radius:999px;
  font-size:14px;font-weight:600;color:var(--ink-700);
  border:1px solid var(--line);background:#fff;white-space:nowrap;
  transition:all .18s ease;
}
.anchor-chip:hover{border-color:#C4B5FD;background:var(--brand-50);color:var(--brand-700);}
.anchor-chip.is-active{background:var(--brand-600);border-color:var(--brand-600);color:#fff;}
.anchor-chip.is-active:hover{color:#fff;}

/* ============ main layout ============ */
.section{padding:56px 0;}
@media(min-width:768px){.section{padding:80px 0;}}
@media(min-width:1024px){.section{padding:96px 0;}}

.layout-2col{display:grid;grid-template-columns:1fr;gap:32px;}
@media(min-width:1024px){.layout-2col{grid-template-columns:minmax(0,1fr) 340px;gap:40px;align-items:start;}}

.sec-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--brand-600);text-transform:uppercase;
}
.sec-title{
  margin-top:10px;
  font-size:clamp(24px,3.4vw,34px);line-height:1.28;font-weight:800;color:var(--ink-900);
}
.sec-desc{margin-top:12px;font-size:16px;line-height:1.85;color:var(--ink-500);max-width:700px;}

.figure-block{margin-top:26px;position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-1);}
.figure-block img{width:100%;height:100%;object-fit:cover;border-radius:0;aspect-ratio:16/9;}
.figure-cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:26px 22px 16px;color:#fff;font-size:14px;
  background:linear-gradient(180deg,rgba(23,16,43,0) 0%,rgba(23,16,43,.78) 100%);
  border-radius:0;
}

/* ============ dense list ============ */
.dense-list{
  margin-top:26px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden;
}
.dense-row{
  display:flex;align-items:flex-start;gap:16px;
  padding:18px 20px;
  border-bottom:1px solid var(--line);
  color:inherit;
  transition:background .18s ease,padding-left .18s ease;
}
.dense-row:last-child{border-bottom:none;}
.dense-row:hover{background:var(--brand-50);padding-left:26px;color:inherit;}
.dense-num{
  flex:0 0 auto;width:34px;height:34px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-50);color:var(--brand-700);
  font-size:13px;font-weight:800;font-variant-numeric:tabular-nums;
  transition:background .18s ease,color .18s ease;
}
.dense-row:hover .dense-num{background:var(--brand-600);color:#fff;}
.dense-body{flex:1 1 auto;min-width:0;}
.dense-title{display:block;font-size:17px;font-weight:700;color:var(--ink-900);line-height:1.5;}
.dense-desc{display:block;margin-top:6px;font-size:14px;line-height:1.8;color:var(--ink-500);}
.dense-arrow{
  flex:0 0 auto;color:#B9B2CD;font-size:18px;line-height:1;margin-top:7px;
  transition:transform .18s ease,color .18s ease;
}
.dense-row:hover .dense-arrow{transform:translateX(4px);color:var(--brand-600);}

/* ============ sidebar ============ */
.side-col{display:flex;flex-direction:column;gap:20px;}
@media(min-width:1024px){
  .side-col{position:sticky;top:128px;}
}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px;box-shadow:var(--shadow-1);
}
.side-title{font-size:15px;font-weight:800;color:var(--ink-900);letter-spacing:.02em;}
.side-nav{margin-top:14px;}
.side-nav a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 0;border-bottom:1px dashed var(--line);
  font-size:14.5px;font-weight:600;color:var(--ink-700);
  transition:color .18s ease,padding-left .18s ease;
}
.side-nav a:last-child{border-bottom:none;}
.side-nav a:hover{color:var(--brand-700);padding-left:5px;}
.side-nav a .mini-arw{color:#C0B9D4;}
.side-nav a:hover .mini-arw{color:var(--brand-600);}
.side-cta{
  background:linear-gradient(160deg,#F5F3FF 0%,#FFFFFF 62%);
  border:1px solid var(--brand-100);
}
.side-cta p{font-size:14px;line-height:1.85;color:var(--ink-500);margin-top:10px;}
.side-cta .btn-primary{width:100%;margin-top:16px;}
.side-points{margin-top:14px;display:flex;flex-direction:column;gap:12px;}
.side-points li{
  display:flex;gap:10px;font-size:14px;line-height:1.8;color:var(--ink-700);
}
.side-points .tick{
  flex:0 0 auto;width:18px;height:18px;border-radius:50%;margin-top:5px;
  background:var(--brand-100);color:var(--brand-700);
  display:inline-flex;align-items:center;justify-content:center;font-size:11px;font-weight:800;
}

/* ============ steps dark band ============ */
.steps-band{background:var(--ink-900);color:#C7C2D9;}
.steps-band .sec-title{color:#fff;}
.steps-band .sec-desc{color:#A79FC4;}
.steps-grid{
  margin-top:36px;display:grid;grid-template-columns:1fr;gap:1px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius-card);overflow:hidden;
}
@media(min-width:640px){.steps-grid{grid-template-columns:1fr 1fr;}}
@media(min-width:1024px){.steps-grid{grid-template-columns:repeat(4,1fr);}}
.step-cell{background:var(--ink-900);padding:26px 22px;}
.step-num{
  font-size:32px;font-weight:800;line-height:1;color:var(--accent-400);
  font-variant-numeric:tabular-nums;
}
.step-cell h3{margin-top:14px;font-size:17px;font-weight:700;color:#fff;}
.step-cell p{margin-top:8px;font-size:14px;line-height:1.85;color:#A79FC4;}

/* ============ FAQ ============ */
.faq-list{margin-top:26px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 0;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-q{font-size:17px;font-weight:700;color:var(--ink-900);line-height:1.6;}
.faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;
  background:var(--brand-50);color:var(--brand-700);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:700;line-height:1;
  transition:transform .22s ease,background .22s ease,color .22s ease;
}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--brand-600);color:#fff;}
.faq-item .faq-a{
  padding:0 44px 20px 0;font-size:15.5px;line-height:1.9;color:var(--ink-500);
}
.faq-item summary:hover .faq-q{color:var(--brand-700);}

/* ============ CTA ============ */
.cta-band{
  background:linear-gradient(120deg,#F5F3FF 0%,#FFFFFF 55%,#F7FEE7 100%);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-inner{
  display:grid;grid-template-columns:1fr;gap:24px;align-items:center;
}
@media(min-width:1024px){.cta-inner{grid-template-columns:1.4fr 1fr;gap:40px;}}
.cta-inner h2{font-size:clamp(24px,3.2vw,32px);line-height:1.3;font-weight:800;color:var(--ink-900);}
.cta-inner p{margin-top:12px;font-size:16px;line-height:1.85;color:var(--ink-500);}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
@media(min-width:1024px){.cta-actions{justify-content:flex-end;}}

/* ============ footer ============ */
.site-footer{background:var(--ink-900);color:#C7C2D9;padding:56px 0 22px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px;}
@media(min-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:34px 28px;}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}}
.footer-title{font-size:15px;font-weight:800;color:#fff;margin-bottom:16px;letter-spacing:.02em;}
.footer-link{
  display:block;padding:6px 0;font-size:14px;color:#C7C2D9;
  transition:color .18s ease,transform .18s ease;
}
.footer-link:hover{color:#fff;transform:translateX(3px);}
.footer-bottom{
  margin-top:38px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px 26px;justify-content:space-between;
  font-size:13px;line-height:1.8;color:#8F89A6;
}
.footer-bottom span{max-width:660px;}

/* ============ reveal ============ */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .55s ease,transform .55s ease;}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none;}
}

/* roulang page: category1 */
:root{
    --brand-600:#6D28D9;
    --brand-700:#5B21B6;
    --brand-500:#7C3AED;
    --brand-50:#F5F3FF;
    --brand-100:#EDE9FE;
    --accent-400:#A3E635;
    --ink-900:#17102B;
    --ink-700:#3A3350;
    --ink-500:#6B6480;
    --line:#E7E3F1;
    --page:#FBFAFD;
    --card:#FFFFFF;
    --radius-card:16px;
    --radius-btn:10px;
    --shadow-card:0 1px 2px rgba(23,16,43,.05);
    --shadow-hover:0 14px 34px -14px rgba(23,16,43,.22);
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--page);
    color:var(--ink-900);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
    font-size:16px;
    line-height:1.85;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;}
  a{color:var(--brand-600);text-decoration:none;transition:color .2s ease;}
  a:hover{color:var(--brand-700);}
  button{font:inherit;}
  h1,h2,h3,p,ul,ol,figure{margin:0;}
  ul{list-style:none;padding:0;}
  :focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}

  .wrap{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
  @media(min-width:768px){.wrap{padding-left:24px;padding-right:24px;}}
  @media(min-width:1024px){.wrap{padding-left:32px;padding-right:32px;}}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(251,250,253,.94);
    border-bottom:1px solid var(--line);
    transition:box-shadow .25s ease;
  }
  .site-header.scrolled{box-shadow:0 10px 30px -22px rgba(23,16,43,.55);}
  .header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px;}
  @media(max-width:1023px){.header-inner{height:56px;}}

  .brand-mark{
    width:30px;height:30px;flex:0 0 auto;border-radius:9px;
    background:linear-gradient(135deg,var(--brand-600) 0%,var(--brand-500) 45%,var(--accent-400) 100%);
    box-shadow:0 8px 18px -10px rgba(109,40,217,.75);
    position:relative;
  }
  .brand-mark::after{
    content:"";position:absolute;inset:9px;border-radius:3px;background:rgba(255,255,255,.85);
  }
  .brand-text{font-size:17px;font-weight:800;color:var(--ink-900);letter-spacing:-.01em;line-height:1;}

  .nav-link{
    position:relative;display:inline-flex;align-items:center;
    padding:10px 14px;font-size:15px;font-weight:600;color:var(--ink-700);
    border-radius:8px;transition:color .2s ease,background .2s ease;
  }
  .nav-link:hover{color:var(--brand-600);background:var(--brand-50);}
  .nav-link.active{color:var(--brand-600);}
  .nav-link.active::after{
    content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;
    background:var(--brand-600);border-radius:2px;
  }

  .icon-btn{
    width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
    border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--ink-700);
    cursor:pointer;transition:border-color .2s ease,color .2s ease,transform .18s ease;
  }
  .icon-btn:hover{border-color:#C4B5FD;color:var(--brand-600);}
  .icon-btn:active{transform:scale(.96);}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 22px;border-radius:var(--radius-btn);
    font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
    transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
    white-space:nowrap;
  }
  .btn-primary{
    background:linear-gradient(135deg,#7C3AED 0%,#5B21B6 100%);
    color:#fff;box-shadow:0 10px 24px -10px rgba(109,40,217,.5);
  }
  .btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 16px 30px -12px rgba(109,40,217,.55);}
  .btn-ghost{background:#fff;border-color:#D8D2EA;color:var(--brand-700);}
  .btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-700);transform:translateY(-2px);}
  .btn:active{transform:scale(.98);}
  .btn-sm{height:38px;padding:0 16px;font-size:14px;}

  .arrow-link{
    display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--brand-600);
  }
  .arrow-link svg{transition:transform .2s ease;}
  .arrow-link:hover svg{transform:translateX(3px);}

  .mobile-menu{
    border-top:1px solid var(--line);background:#fff;
    padding:10px 20px 20px;
  }
  .mobile-link{
    display:flex;align-items:center;min-height:46px;padding:0 12px;border-radius:10px;
    font-size:15px;font-weight:600;color:var(--ink-700);
  }
  .mobile-link:hover{background:var(--brand-50);color:var(--brand-600);}
  .mobile-link.active{background:var(--brand-50);color:var(--brand-600);}

  /* ---------- hero ---------- */
  .hero-cat{
    background:linear-gradient(180deg,#F5F3FF 0%,#FBFAFD 100%);
    border-bottom:1px solid var(--line);
  }
  .breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--ink-500);}
  .breadcrumb a{color:var(--ink-500);}
  .breadcrumb a:hover{color:var(--brand-600);}
  .breadcrumb .sep{color:#C7C2D9;}
  .breadcrumb .current{color:var(--ink-700);font-weight:600;}

  .tag-pill{
    display:inline-flex;align-items:center;gap:6px;
    height:28px;padding:0 12px;border-radius:999px;
    background:#fff;border:1px solid var(--brand-100);
    color:var(--brand-700);font-size:12.5px;font-weight:700;letter-spacing:.02em;
  }
  .tag-pill .dot{width:6px;height:6px;border-radius:50%;background:var(--accent-400);}

  .hero-title{
    font-size:clamp(30px,5vw,48px);line-height:1.18;font-weight:800;letter-spacing:-.02em;
    color:var(--ink-900);margin-top:18px;
  }
  .hero-lead{
    font-size:clamp(15px,2vw,17.5px);line-height:1.85;color:var(--ink-700);
    margin-top:16px;max-width:720px;
  }
  .trust-row{
    display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:28px;
    font-size:13.5px;color:var(--ink-500);
  }
  .trust-row span{display:inline-flex;align-items:center;gap:8px;}
  .trust-row span::before{
    content:"";width:6px;height:6px;border-radius:2px;background:var(--brand-500);display:inline-block;
  }

  /* ---------- anchor bar ---------- */
  .anchor-bar{
    position:sticky;top:64px;z-index:50;
    background:rgba(251,250,253,.96);
    border-bottom:1px solid var(--line);
  }
  @media(max-width:1023px){.anchor-bar{top:56px;}}
  .anchor-scroll{
    display:flex;align-items:center;overflow-x:auto;gap:26px;
    scrollbar-width:none;
  }
  .anchor-scroll::-webkit-scrollbar{display:none;}
  .anchor-link{
    position:relative;flex:0 0 auto;padding:14px 0;font-size:14px;font-weight:600;
    color:var(--ink-500);border-bottom:2px solid transparent;transition:color .2s ease,border-color .2s ease;
  }
  .anchor-link:hover{color:var(--brand-600);}
  .anchor-link.active{color:var(--brand-600);border-bottom-color:var(--brand-600);}

  /* ---------- sections ---------- */
  .section{padding:56px 0;}
  @media(min-width:768px){.section{padding:80px 0;}}
  @media(min-width:1024px){.section{padding:100px 0;}}
  .section-head{max-width:720px;}
  .eyebrow{
    display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:.14em;
    color:var(--brand-600);text-transform:uppercase;
  }
  .section-title{
    font-size:clamp(24px,3.4vw,36px);line-height:1.25;font-weight:800;letter-spacing:-.015em;
    color:var(--ink-900);margin-top:12px;
  }
  .section-sub{font-size:16px;line-height:1.9;color:var(--ink-500);margin-top:14px;}

  /* ---------- zigzag ---------- */
  .zigzag{display:flex;flex-direction:column;gap:56px;}
  @media(min-width:1024px){.zigzag{gap:96px;}}
  .zigzag-item{display:grid;grid-template-columns:1fr;gap:26px;align-items:center;}
  @media(min-width:1024px){
    .zigzag-item{grid-template-columns:1fr 1fr;gap:64px;}
    .zigzag-item .zz-text{order:1;}
    .zigzag-item .zz-media{order:2;}
    .zigzag-item.rev .zz-text{order:2;}
    .zigzag-item.rev .zz-media{order:1;}
  }
  .zz-index{
    display:inline-flex;align-items:center;justify-content:center;
    width:34px;height:34px;border-radius:11px;
    background:var(--brand-50);color:var(--brand-700);
    font-size:14px;font-weight:800;font-variant-numeric:tabular-nums;
  }
  .zz-title{font-size:clamp(20px,2.6vw,26px);line-height:1.35;font-weight:800;color:var(--ink-900);margin-top:16px;}
  .zz-text p{margin-top:14px;color:var(--ink-700);font-size:16px;line-height:1.9;}
  .point-list{margin-top:20px;display:flex;flex-direction:column;gap:12px;}
  .point-list li{
    position:relative;padding-left:22px;font-size:15px;line-height:1.8;color:var(--ink-700);
  }
  .point-list li::before{
    content:"";position:absolute;left:0;top:10px;width:9px;height:9px;border-radius:3px;
    background:linear-gradient(135deg,var(--brand-500),var(--accent-400));
  }
  .zz-media{
    border-radius:18px;overflow:hidden;border:1px solid var(--line);
    box-shadow:var(--shadow-card);background:#fff;
  }
  .zz-media img{width:100%;aspect-ratio:16/9;object-fit:cover;}

  /* ---------- checklist ---------- */
  .checklist{border-top:1px solid var(--line);}
  .check-row{
    display:flex;gap:18px;padding:20px 14px;border-bottom:1px solid var(--line);
    transition:background .2s ease,padding-left .2s ease;
  }
  .check-row:hover{background:var(--brand-50);padding-left:20px;}
  .check-num{
    font-size:14px;font-weight:800;color:var(--brand-600);font-variant-numeric:tabular-nums;
    flex:0 0 36px;padding-top:2px;letter-spacing:.02em;
  }
  .check-title{font-size:16.5px;font-weight:700;color:var(--ink-900);}
  .check-desc{font-size:14.5px;line-height:1.85;color:var(--ink-500);margin-top:4px;}

  /* ---------- faq ---------- */
  .faq-list{border-top:1px solid var(--line);}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
    gap:18px;padding:18px 0;font-size:16.5px;font-weight:700;color:var(--ink-900);
    transition:color .2s ease;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:hover{color:var(--brand-600);}
  .faq-icon{
    width:28px;height:28px;flex:0 0 auto;border-radius:50%;
    background:var(--brand-50);color:var(--brand-600);
    display:inline-flex;align-items:center;justify-content:center;
    font-size:17px;font-weight:700;line-height:1;
    transition:transform .25s ease,background .25s ease,color .25s ease;
  }
  .faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--brand-600);color:#fff;}
  .faq-answer{padding:0 0 22px;font-size:15.5px;line-height:1.9;color:var(--ink-700);max-width:820px;}

  /* ---------- cta band ---------- */
  .cta-band{
    background:radial-gradient(120% 140% at 12% 0%,#2B1B54 0%,#17102B 58%);
    border-radius:22px;padding:40px 28px;color:#fff;
    display:flex;flex-direction:column;gap:26px;
  }
  @media(min-width:1024px){.cta-band{padding:56px 56px;flex-direction:row;align-items:center;justify-content:space-between;}}
  .cta-band h2{font-size:clamp(22px,2.8vw,32px);line-height:1.3;font-weight:800;letter-spacing:-.015em;}
  .cta-band p{margin-top:14px;color:#C7C2D9;font-size:15.5px;line-height:1.9;max-width:620px;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

  /* ---------- footer ---------- */
  .site-footer{background:var(--ink-900);color:#C7C2D9;padding:64px 0 0;margin-top:0;}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:36px;}
  @media(min-width:768px){.footer-grid{grid-template-columns:1fr 1fr;}}
  @media(min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:44px;}}
  .footer-title{color:#fff;font-size:15px;font-weight:700;margin:0 0 14px;}
  .footer-link{display:block;color:#C7C2D9;font-size:14px;line-height:2.05;}
  .footer-link:hover{color:#fff;}
  .footer-bottom{
    display:flex;flex-direction:column;gap:10px;
    border-top:1px solid rgba(255,255,255,.12);
    margin-top:48px;padding:22px 0 32px;
    font-size:12.5px;color:#8F89A6;line-height:1.8;
  }
  @media(min-width:1024px){
    .footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;gap:40px;}
    .footer-bottom span:last-child{max-width:660px;text-align:right;}
  }
  .site-footer .brand-mark{width:28px;height:28px;}