/* roulang page: index */
:root{
  --brand:#6C4CF1;
  --brand-hover:#7A5CFF;
  --brand-light:#ECE7FF;
  --accent:#C8FF4D;
  --accent-cyan:#29E0D6;
  --ink-900:#12101F;
  --ink-700:#1C1836;
  --bg:#F5F5FA;
  --card:#FFFFFF;
  --line:#E7E5F2;
  --text:#1A1730;
  --text-2:#5C5A72;
  --text-3:#8B89A0;
  --dark-text:#C9C6DE;
  --radius-sm:10px;
  --radius:16px;
  --radius-lg:20px;
  --sh-1:0 2px 8px rgba(18,16,31,.04);
  --sh-2:0 8px 24px rgba(122,92,255,.10);
  --sh-3:0 18px 40px rgba(122,92,255,.18);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:"Inter",system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::selection{background:var(--brand);color:#fff}
section[id],div[id]{scroll-margin-top:110px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
@media (min-width:768px){.container{padding:0 24px}}
@media (min-width:1024px){.container{padding:0 32px}}

.section{padding:64px 0}
@media (min-width:768px){.section{padding:88px 0}}
@media (min-width:1024px){.section{padding:104px 0}}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:50;padding-bottom:0}
.nav-shell{
  margin:12px auto 0;background:#fff;border:1px solid transparent;border-radius:var(--radius);
  box-shadow:var(--sh-2);padding:10px 14px;display:flex;align-items:center;gap:10px;
  transition:box-shadow .22s ease-out,border-color .22s ease-out;
}
.site-header.is-scrolled .nav-shell{border-color:var(--line);box-shadow:0 8px 26px rgba(18,16,31,.10)}
.logo-mark{flex-shrink:0;width:40px;height:40px;border-radius:12px;background:var(--ink-900);display:grid;place-items:center}
.nav-card{
  display:inline-flex;align-items:center;gap:7px;padding:8px 12px;border-radius:var(--radius-sm);
  font-size:14px;font-weight:600;color:var(--text-2);transition:background .18s ease-out,color .18s ease-out;
}
.nav-card svg{width:19px;height:19px;stroke-width:1.75;transition:color .18s ease-out}
.nav-card:hover{background:var(--brand-light);color:#5B3ED6}
.nav-card.is-active{background:var(--brand-light);color:#5B3ED6}
.nav-card.is-active svg{color:var(--brand)}
.nav-toggle{
  width:44px;height:44px;display:grid;place-items:center;border-radius:12px;border:1px solid var(--line);
  background:#fff;cursor:pointer;transition:background .18s ease-out,border-color .18s ease-out;
}
.nav-toggle:hover{background:var(--brand-light);border-color:rgba(122,92,255,.35)}
.mobile-drawer{
  position:fixed;inset:0;z-index:60;background:var(--ink-900);padding:18px 16px 26px;
  display:flex;flex-direction:column;gap:18px;overflow-y:auto;
  transform:translateY(-100%);opacity:0;pointer-events:none;
  transition:transform .28s ease-out,opacity .22s ease-out;
}
.mobile-drawer.is-open{transform:translateY(0);opacity:1;pointer-events:auto}
.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.drawer-card{
  background:var(--ink-700);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:14px;
  color:#fff;font-weight:600;font-size:14px;display:flex;flex-direction:column;gap:8px;
  transition:border-color .18s ease-out,transform .18s ease-out;
}
.drawer-card:hover{border-color:rgba(200,255,77,.55);transform:translateY(-2px)}
.drawer-card svg{width:20px;height:20px;color:var(--accent)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 22px;
  border:none;border-radius:12px;font-size:15px;font-weight:700;cursor:pointer;text-decoration:none;
  transition:background .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out,color .2s ease-out,border-color .2s ease-out;
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#12101F}
.btn-primary:hover{background:#D8FF7C;transform:translateY(-2px);box-shadow:0 12px 26px rgba(200,255,77,.30)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-brand{background:var(--brand);color:#fff}
.btn-brand:hover{background:var(--brand-hover);transform:translateY(-2px);box-shadow:0 12px 26px rgba(108,76,241,.30)}
.btn-ghost{background:transparent;color:var(--brand);border:1.5px solid rgba(108,76,241,.55)}
.btn-ghost:hover{background:rgba(108,76,241,.08);transform:translateY(-2px)}
.btn-ghost-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.35)}
.btn-ghost-light:hover{background:rgba(255,255,255,.10);border-color:rgba(200,255,77,.65)}
.btn-sm{height:42px;padding:0 18px;font-size:14px;border-radius:11px}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;background:var(--brand-light);color:#5B3ED6;
  border-radius:999px;padding:4px 12px;font-size:12.5px;font-weight:600;line-height:1.6;
}
.badge-accent{background:var(--accent);color:#12101F}
.badge-dark{background:rgba(255,255,255,.10);color:var(--dark-text)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--brand);text-transform:uppercase;
}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--accent)}

/* ---------- 卡片 ---------- */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--sh-1);
  transition:transform .22s ease-out,box-shadow .22s ease-out,border-color .22s ease-out;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(122,92,255,.35)}
.media-frame{overflow:hidden;border-radius:var(--radius) var(--radius) 0 0;background:#EDEBF7}
.media-frame img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease-out}
.card:hover .media-frame img{transform:scale(1.04)}
.corner-cut{clip-path:polygon(8px 0,100% 0,100% 100%,0 100%,0 8px)}

/* ---------- 首屏 ---------- */
.hero{position:relative;background:var(--ink-900);overflow:hidden;border-radius:0 0 28px 28px}
.hero-media{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;opacity:.55}
.hero-veil{position:absolute;inset:0;background:linear-gradient(100deg,rgba(18,16,31,.96) 0%,rgba(18,16,31,.90) 48%,rgba(18,16,31,.72) 100%)}
.hero-glow{position:absolute;right:-140px;top:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(108,76,241,.55) 0%,rgba(108,76,241,0) 70%);pointer-events:none}
.scanlines{background-image:repeating-linear-gradient(to bottom,rgba(255,255,255,.055) 0 1px,transparent 1px 6px)}
.dot-grid{
  background-image:radial-gradient(currentColor 1.5px,transparent 1.5px);
  background-size:16px 16px;color:var(--accent);opacity:.14;
}
.hero h1{font-size:clamp(28px,5vw,44px);line-height:1.25;font-weight:800;color:#fff;letter-spacing:.01em}
.hero-sub{color:var(--dark-text);font-size:16.5px;line-height:1.85;max-width:560px}
.trust-row{display:flex;flex-wrap:wrap;gap:10px 22px}
.trust-item{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--dark-text)}
.trust-item svg{width:17px;height:17px;color:var(--accent);flex-shrink:0}

.login-card{
  background:#fff;border-radius:var(--radius-lg);box-shadow:var(--sh-3);padding:26px 24px 22px;
  border:1px solid rgba(255,255,255,.6);
}
.form-label{display:block;font-size:14px;font-weight:500;color:var(--text-2);margin-bottom:7px}
.form-input{
  width:100%;height:48px;border-radius:12px;border:1px solid #E0DEEB;background:#FCFCFE;
  padding:0 14px;font-size:15px;transition:border-color .18s ease-out,box-shadow .18s ease-out,background .18s ease-out;
}
.form-input::placeholder{color:#A9A7BA}
.form-input:focus{outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(108,76,241,.14)}
.form-input:hover{border-color:#CFCBE4}
select.form-input{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#8B89A0 50%),linear-gradient(135deg,#8B89A0 50%,transparent 50%);
  background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
textarea.form-input{height:auto;min-height:124px;padding:12px 14px;resize:vertical;line-height:1.8}
.safe-tip{
  display:flex;align-items:flex-start;gap:8px;margin-top:16px;padding:10px 12px;border-radius:12px;
  background:rgba(200,255,77,.16);color:#3F3A1B;font-size:13px;line-height:1.7;
}
.safe-tip svg{width:17px;height:17px;color:#5F7A12;flex-shrink:0;margin-top:3px}
.link-brand{color:var(--brand);font-weight:600;border-bottom:1.5px solid rgba(108,76,241,.28);transition:color .18s ease-out,border-color .18s ease-out}
.link-brand:hover{color:#4A2FD0;border-color:#4A2FD0}

/* ---------- 快捷入口 bento ---------- */
.bento{display:grid;grid-template-columns:1fr;gap:18px}
@media (min-width:768px){.bento{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){
  .bento{grid-template-columns:repeat(3,1fr)}
  .bento-lead{grid-column:1 / 2;grid-row:1 / 3}
}
.bento-lead{position:relative;display:flex;flex-direction:column;justify-content:flex-end;min-height:300px;overflow:hidden;border-radius:var(--radius)}
.bento-lead img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.bento-lead .veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(18,16,31,.15) 0%,rgba(18,16,31,.88) 100%)}
.bento-lead .inner{position:relative;z-index:2;padding:26px 24px;color:#fff}
.mini-card{display:flex;gap:14px;padding:20px 20px;align-items:flex-start}
.mini-icon{
  flex-shrink:0;width:44px;height:44px;border-radius:12px;background:var(--brand-light);
  display:grid;place-items:center;color:var(--brand);
}
.mini-icon svg{width:22px;height:22px;stroke-width:1.75}
.mini-card:hover .mini-icon{background:var(--brand);color:#fff;transition:background .2s ease-out,color .2s ease-out}

/* ---------- 数据带 ---------- */
.band{position:relative;background:var(--ink-900);overflow:hidden;border-radius:24px}
.band .inner{position:relative;z-index:2;padding:38px 24px}
@media (min-width:768px){.band .inner{padding:46px 40px}}
.band-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px 20px}
@media (min-width:900px){.band-grid{grid-template-columns:repeat(4,1fr)}}
.band-item{position:relative;padding-left:0}
@media (min-width:900px){
  .band-item:not(:first-child){padding-left:24px}
  .band-item:not(:first-child)::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:1px;background:rgba(255,255,255,.08)}
}
.band-key{font-size:21px;font-weight:800;color:var(--accent);letter-spacing:.02em;line-height:1.4}
.band-desc{font-size:14px;color:var(--dark-text);margin-top:6px;line-height:1.75}

/* ---------- 场景卡 ---------- */
.scene-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:700px){.scene-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.scene-grid{grid-template-columns:repeat(3,1fr)}}
.scene-card{display:flex;flex-direction:column;overflow:hidden}
.scene-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.scene-title{font-size:18px;font-weight:700;line-height:1.5}
.arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--brand);margin-top:auto}
.arrow-link svg{width:16px;height:16px;transition:transform .22s ease-out}
.card:hover .arrow-link svg{transform:translateX(4px)}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:1fr;gap:18px}
@media (min-width:768px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.steps{grid-template-columns:repeat(4,1fr)}}
.step-num{
  width:42px;height:42px;border-radius:50%;display:grid;place-items:center;
  background:var(--brand-light);border:1.5px solid rgba(108,76,241,.45);color:var(--brand);
  font-weight:800;font-size:16px;flex-shrink:0;
}

/* ---------- CMS 资讯 ---------- */
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.section-title{font-size:clamp(22px,3.2vw,32px);line-height:1.3;font-weight:700;letter-spacing:.01em}
.section-desc{color:var(--text-2);font-size:15.5px;margin-top:8px;max-width:640px}
.cms-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:1024px){.cms-grid{grid-template-columns:1.05fr 1fr}}
.cms-lead{overflow:hidden;display:flex;flex-direction:column}
.cms-lead .media-frame{aspect-ratio:16/9;border-radius:var(--radius) var(--radius) 0 0}
.cms-lead-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.cms-lead h3{font-size:19px;font-weight:700;line-height:1.55}
.cms-lead h3 a:hover{color:var(--brand)}
.cms-excerpt{font-size:14.5px;color:var(--text-2);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cms-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--text-3);margin-top:auto;padding-top:6px}
.cms-list{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--sh-1);overflow:hidden}
.cms-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:15px 20px;border-bottom:1px solid var(--line);transition:background .18s ease-out}
.cms-list li:last-child .cms-row{border-bottom:none}
.cms-row:hover{background:var(--surface)}
.cms-row-title{
  font-size:15px;font-weight:600;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s ease-out;
}
.cms-row:hover .cms-row-title{color:var(--brand)}
.cms-row-side{display:flex;align-items:center;gap:12px;flex-shrink:0;font-size:12.5px;color:var(--text-3)}
.cms-empty{
  grid-column:1 / -1;min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  background:#fff;border:1px dashed var(--line);border-radius:var(--radius);color:var(--text-3);font-size:14.5px;
}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.acc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--sh-1);overflow:hidden;transition:border-color .2s ease-out,box-shadow .2s ease-out}
.acc:hover{border-color:rgba(122,92,255,.35)}
.acc[open]{box-shadow:var(--sh-2)}
.acc summary{
  list-style:none;cursor:pointer;padding:18px 22px;font-size:17px;font-weight:700;line-height:1.6;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.acc summary::-webkit-details-marker{display:none}
.acc-icon{
  position:relative;flex-shrink:0;width:22px;height:22px;border-radius:50%;
  border:1.5px solid rgba(108,76,241,.45);transition:transform .24s ease-out,background .2s ease-out;
}
.acc-icon::before,.acc-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--brand);border-radius:2px;transform:translate(-50%,-50%)}
.acc-icon::before{width:10px;height:2px}
.acc-icon::after{width:2px;height:10px}
.acc[open] .acc-icon{transform:rotate(180deg);background:var(--brand-light)}
.acc[open] .acc-icon::before{width:9px}
.acc[open] .acc-icon::after{height:2px}
.acc-body{
  padding:0 22px 20px 22px;font-size:15px;line-height:1.9;color:var(--text-2);
  border-left:3px solid var(--accent);margin-left:22px;padding-left:16px;margin-right:22px;
}

/* ---------- CTA / 表单 ---------- */
.cta-panel{
  position:relative;overflow:hidden;border-radius:24px;background:var(--ink-900);
  display:grid;grid-template-columns:1fr;gap:0;
}
@media (min-width:1024px){.cta-panel{grid-template-columns:1fr 1fr}}
.cta-media{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.webp');background-size:cover;background-position:center;opacity:.28}
.cta-left{position:relative;z-index:2;padding:36px 26px;color:#fff}
@media (min-width:768px){.cta-left{padding:46px 40px}}
.cta-right{position:relative;z-index:2;background:#fff;padding:30px 24px;border-radius:20px;margin:14px}
@media (min-width:768px){.cta-right{padding:38px 36px;margin:16px}}
.form-row{margin-bottom:18px}
.form-hint{font-size:13px;color:var(--text-3);margin-top:7px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:var(--dark-text);padding:64px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media (min-width:700px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.1fr}}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{color:#A8A5BD;font-size:14.5px;transition:color .18s ease-out,transform .18s ease-out;display:inline-block}
.footer-links a:hover{color:var(--accent);transform:translateX(2px)}
.footer-desc{font-size:14px;line-height:1.85;color:#A8A5BD;max-width:290px;margin-top:14px}
.footer-social{display:flex;gap:10px;margin-top:18px}
.footer-social a{
  width:40px;height:40px;border-radius:12px;border:1px solid rgba(255,255,255,.12);display:grid;place-items:center;
  color:#C9C6DE;transition:border-color .18s ease-out,color .18s ease-out,background .18s ease-out;
}
.footer-social a:hover{border-color:rgba(200,255,77,.6);color:var(--accent);background:rgba(200,255,77,.08)}
.footer-social svg{width:19px;height:19px}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;font-size:13.5px;color:#8B89A0;
}
.top-btn{
  position:fixed;right:18px;bottom:22px;z-index:40;width:46px;height:46px;border-radius:50%;
  border:1.5px solid rgba(200,255,77,.7);background:rgba(18,16,31,.88);color:var(--accent);
  display:grid;place-items:center;cursor:pointer;opacity:0;pointer-events:none;
  transition:opacity .24s ease-out,transform .24s ease-out;
}
.top-btn.is-show{opacity:1;pointer-events:auto}
.top-btn:hover{transform:translateY(-3px)}

/* roulang page: category1 */
:root{
  --brand:#6C4CF1;--brand-hover:#7A5CFF;--brand-soft:#ECE7FF;
  --accent:#C8FF4D;--accent-2:#29E0D6;
  --ink-900:#12101F;--ink-700:#1C1836;
  --bg:#F5F5FA;--surface:#FFFFFF;--line:#E7E5F2;
  --text:#1A1730;--text-2:#5C5A72;--text-3:#8B89A0;
  --on-dark:#FFFFFF;--on-dark-2:#C9C6DE;
  --r-s:10px;--r:16px;--r-l:20px;
  --sh-1:0 2px 8px rgba(18,16,31,.04);
  --sh-2:0 8px 24px rgba(122,92,255,.10);
  --sh-3:0 18px 40px rgba(122,92,255,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:Inter,system-ui,'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;
  font-size:16.5px;line-height:1.85;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul{list-style:none;padding:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
@media (max-width:1023px){.container{padding:0 24px}}
@media (max-width:639px){.container{padding:0 16px}}
.no-scroll{overflow:hidden}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:50;padding:12px 0 6px;background:linear-gradient(180deg,rgba(245,245,250,.96) 60%,rgba(245,245,250,0))}
.nav-shell{
  display:flex;align-items:center;gap:10px;min-height:76px;padding:0 16px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--sh-2);
}
.logo-mark{
  display:grid;place-items:center;width:44px;height:44px;flex:0 0 44px;
  border-radius:12px;background:var(--ink-900);box-shadow:inset 0 0 0 1px rgba(200,255,77,.12);
}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;padding:9px 14px;border-radius:var(--r-s);
  font-size:14.5px;font-weight:600;color:var(--text-2);white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.nav-card svg{width:18px;height:18px;stroke-width:1.75;stroke:currentColor}
.nav-card:hover{background:var(--brand-soft);color:var(--brand);transform:translateY(-1px)}
.nav-card.is-active{background:var(--brand-soft);color:var(--brand)}
.nav-toggle{
  margin-left:auto;display:grid;place-items:center;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);color:var(--text);transition:background .2s var(--ease);
}
.nav-toggle:hover{background:var(--brand-soft);color:var(--brand)}
.nav-toggle svg{width:22px;height:22px;stroke-width:1.75;stroke:currentColor}
.mobile-drawer{
  position:fixed;inset:0;z-index:70;background:var(--surface);padding:20px 20px 28px;
  overflow-y:auto;opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
}
.mobile-drawer.is-open{opacity:1;visibility:visible;transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.drawer-item{
  display:flex;flex-direction:column;gap:8px;padding:16px;border:1px solid var(--line);
  border-radius:14px;font-weight:700;font-size:15px;color:var(--text);background:var(--bg);
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.drawer-item svg{width:22px;height:22px;stroke-width:1.75;stroke:var(--brand)}
.drawer-item:hover{border-color:rgba(122,92,255,.35);background:var(--brand-soft)}
.drawer-item small{font-weight:400;font-size:12.5px;color:var(--text-3)}

/* ---------- 按钮 ---------- */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--accent);color:var(--ink-900);font-weight:700;font-size:15.5px;
  padding:13px 26px;border-radius:999px;border:1px solid transparent;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease);
}
.btn-primary:hover{background:#d7ff70;transform:translateY(-2px);box-shadow:0 12px 26px rgba(200,255,77,.30)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-primary svg{width:18px;height:18px;stroke-width:2;stroke:currentColor}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:transparent;color:var(--brand);font-weight:700;font-size:15.5px;
  padding:12px 24px;border-radius:999px;border:1.5px solid var(--brand);
  transition:background .18s var(--ease),transform .18s var(--ease);
}
.btn-ghost:hover{background:rgba(108,76,241,.08);transform:translateY(-2px)}
.btn-ghost.on-dark{color:#fff;border-color:rgba(255,255,255,.38)}
.btn-ghost.on-dark:hover{background:rgba(255,255,255,.10);border-color:rgba(255,255,255,.6)}
.btn-sm{padding:10px 18px;font-size:14.5px}

/* ---------- 分类横幅 ---------- */
.page-hero{
  position:relative;overflow:hidden;margin-top:14px;border-radius:var(--r-l);
  background-image:linear-gradient(115deg,rgba(18,16,31,.93) 0%,rgba(18,16,31,.82) 55%,rgba(108,76,241,.72) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  padding:44px 40px 46px;min-height:236px;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.045) 0 1px,transparent 1px 6px);
  opacity:.9;
}
.dot-grid{
  position:absolute;width:96px;height:96px;pointer-events:none;
  background-image:radial-gradient(currentColor 1.6px,transparent 1.7px);
  background-size:12px 12px;color:rgba(200,255,77,.14);
}
.page-hero .dot-grid{right:28px;bottom:22px}
.crumb{position:relative;z-index:2;display:flex;align-items:center;gap:8px;font-size:14px;color:var(--on-dark-2)}
.crumb a{color:var(--on-dark-2);transition:color .18s var(--ease)}
.crumb a:hover{color:var(--accent)}
.crumb .sep{opacity:.55}
.crumb .current{color:#fff;font-weight:600}
.page-hero h1{
  position:relative;z-index:2;color:#fff;font-size:clamp(28px,4.4vw,44px);line-height:1.25;
  font-weight:800;letter-spacing:.01em;margin:18px 0 14px;max-width:840px;
}
.page-hero p{position:relative;z-index:2;color:var(--on-dark-2);font-size:16.5px;line-height:1.85;max-width:720px}
.hero-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section.tight{padding:64px 0}
@media (max-width:1023px){.section{padding:72px 0}.section.tight{padding:56px 0}}
@media (max-width:639px){.section{padding:58px 0}.section.tight{padding:48px 0}}
.section-head{max-width:760px;margin-bottom:40px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.04em;
  color:var(--brand);background:var(--brand-soft);border-radius:999px;padding:6px 14px;margin-bottom:16px;
}
.section-title{font-size:clamp(22px,3.2vw,32px);line-height:1.3;font-weight:700;letter-spacing:.01em}
.section-desc{margin-top:14px;color:var(--text-2);font-size:16.5px}
.badge{
  display:inline-flex;align-items:center;gap:6px;background:var(--brand-soft);color:var(--brand);
  font-size:12.5px;font-weight:700;border-radius:999px;padding:5px 12px;
}
.badge.solid{background:var(--accent);color:var(--ink-900)}

/* ---------- 胶囊筛选条 ---------- */
.chip-row{
  display:flex;gap:10px;overflow-x:auto;padding:6px 2px 14px;scrollbar-width:thin;
}
.chip{
  display:inline-flex;align-items:center;gap:8px;white-space:nowrap;
  padding:10px 18px;border-radius:999px;border:1px solid var(--line);background:var(--surface);
  font-size:14.5px;font-weight:600;color:var(--text-2);
  transition:all .18s var(--ease);
}
.chip:hover{border-color:rgba(122,92,255,.35);color:var(--brand);transform:translateY(-2px)}
.chip.is-on{background:var(--ink-900);border-color:var(--ink-900);color:#fff}
.chip.is-on:hover{color:#fff;transform:translateY(-2px)}

/* ---------- 步骤 ---------- */
.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;position:relative}
.step-card{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:26px 24px 28px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(122,92,255,.35)}
.step-num{
  display:grid;place-items:center;width:34px;height:34px;border-radius:999px;
  background:var(--brand-soft);border:1px solid rgba(108,76,241,.35);
  color:var(--brand);font-weight:700;font-size:15px;margin-bottom:16px;
}
.step-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.step-card p{font-size:15px;color:var(--text-2);line-height:1.85}
@media (max-width:1023px){.step-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:639px){.step-grid{grid-template-columns:1fr}}

/* ---------- 卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(122,92,255,.35)}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink-700)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.card:hover .card-media img{transform:scale(1.04)}
.card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(18,16,31,0) 45%,rgba(18,16,31,.35))}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-title{font-size:19px;font-weight:700;line-height:1.45}
.card-desc{font-size:15px;color:var(--text-2);line-height:1.85}
.card-foot{
  margin-top:auto;display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:700;color:var(--brand);
}
.card-foot svg{width:16px;height:16px;stroke-width:2;stroke:currentColor;transition:transform .2s var(--ease)}
.card:hover .card-foot svg{transform:translateX(4px)}
@media (max-width:1023px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:639px){.card-grid{grid-template-columns:1fr}}

/* ---------- 深色对照面板 ---------- */
.panel-dark{
  position:relative;overflow:hidden;border-radius:var(--r-l);color:#fff;
  background-image:linear-gradient(120deg,rgba(18,16,31,.95),rgba(28,24,54,.92)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;padding:56px 48px;
}
.panel-dark::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.04) 0 1px,transparent 1px 6px);
}
.panel-dark .dot-grid{left:36px;top:32px;color:rgba(41,224,214,.14)}
.panel-dark > *{position:relative;z-index:2}
.panel-dark h2{font-size:clamp(22px,3.2vw,30px);font-weight:700;line-height:1.35;margin-bottom:12px}
.panel-dark .lead{color:var(--on-dark-2);max-width:680px;font-size:16px}
.panel-rows{margin-top:34px;display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.panel-row{
  display:flex;gap:14px;align-items:flex-start;padding:18px 20px;border-radius:14px;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);
  transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.panel-row:hover{background:rgba(255,255,255,.09);border-color:rgba(200,255,77,.35);transform:translateY(-3px)}
.panel-row .tag{
  flex:0 0 auto;font-size:13px;font-weight:700;color:var(--ink-900);background:var(--accent);
  border-radius:8px;padding:4px 10px;margin-top:3px;white-space:nowrap;
}
.panel-row p{font-size:15px;color:var(--on-dark-2);line-height:1.8}
.panel-row strong{display:block;color:#fff;font-size:15.5px;font-weight:700;margin-bottom:5px}
@media (max-width:1023px){.panel-dark{padding:44px 32px}.panel-rows{grid-template-columns:1fr}}
@media (max-width:639px){.panel-dark{padding:34px 20px}.panel-rows{margin-top:26px}}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px;margin:0 auto}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  padding:0 22px;margin-bottom:12px;box-shadow:var(--sh-1);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item:hover{border-color:rgba(122,92,255,.30)}
.faq-item[open]{border-color:rgba(122,92,255,.35);box-shadow:var(--sh-2)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:19px 0;font-size:17px;font-weight:700;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-sign{
  flex:0 0 auto;display:grid;place-items:center;width:28px;height:28px;border-radius:999px;
  border:1px solid var(--line);color:var(--brand);transition:transform .24s var(--ease),background .2s var(--ease);
}
.faq-sign svg{width:15px;height:15px;stroke-width:2.2;stroke:currentColor}
.faq-item[open] .faq-sign{transform:rotate(180deg);background:var(--brand-soft)}
.faq-body{
  border-left:3px solid var(--accent);padding:2px 0 20px 16px;margin-bottom:6px;
  font-size:15px;color:var(--text-2);line-height:1.9;
}

/* ---------- CTA 条 ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-l);
  background-image:linear-gradient(120deg,rgba(18,16,31,.94),rgba(108,76,241,.86)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;padding:52px 48px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(200,255,77,.14) 1.6px,transparent 1.7px);background-size:12px 12px;
  opacity:.6;
}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{font-size:clamp(22px,3vw,30px);font-weight:700;line-height:1.35}
.cta-band p{margin-top:12px;color:var(--on-dark-2);font-size:16px;max-width:600px}
.cta-band .actions{display:flex;gap:12px;flex-wrap:wrap}
@media (max-width:1023px){.cta-band{padding:40px 30px;flex-direction:column;align-items:flex-start}}
@media (max-width:639px){.cta-band{padding:32px 20px}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:var(--on-dark-2);margin-top:20px;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-desc{margin-top:16px;font-size:14.5px;line-height:1.85;color:#A8A5BD;max-width:320px}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{
  display:grid;place-items:center;width:38px;height:38px;border-radius:10px;
  border:1px solid rgba(255,255,255,.14);color:var(--on-dark-2);
  transition:all .2s var(--ease);
}
.footer-social a:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.footer-social svg{width:18px;height:18px}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:14.5px;color:#A8A5BD;transition:color .18s var(--ease),transform .18s var(--ease);display:inline-block}
.footer-links a:hover{color:var(--accent);transform:translateX(2px)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.10);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13.5px;color:#8B89A0}
.back-top{
  display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border-radius:999px;
  border:1px solid var(--accent);color:var(--accent);font-size:14px;font-weight:700;
  transition:all .2s var(--ease);
}
.back-top:hover{background:var(--accent);color:var(--ink-900);transform:translateY(-2px)}
.back-top svg{width:16px;height:16px;stroke-width:2;stroke:currentColor}
@media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media (max-width:639px){.footer-grid{grid-template-columns:1fr;gap:28px}.site-footer{padding:48px 0 24px}}

/* roulang page: article */
:root{
  --brand:#6C4CF1;
  --brand-hover:#7A5CFF;
  --brand-soft:#ECE7FF;
  --accent:#C8FF4D;
  --accent-2:#29E0D6;
  --ink-900:#12101F;
  --ink-700:#1C1836;
  --bg:#F5F5FA;
  --surface:#FFFFFF;
  --line:#E7E5F2;
  --text:#1A1730;
  --text-2:#5C5A72;
  --text-3:#8B89A0;
  --dark-text:#FFFFFF;
  --dark-text-2:#C9C6DE;
  --ok:#22C55E;
  --warn:#F59E0B;
  --err:#E5484D;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:20px;
  --sh-1:0 2px 8px rgba(18,16,31,.04);
  --sh-2:0 8px 24px rgba(122,92,255,.10);
  --sh-3:0 18px 40px rgba(122,92,255,.18);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.005em;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
body .container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:50;padding:12px 0 10px;background:linear-gradient(180deg,var(--bg) 72%,rgba(245,245,250,0))}
.nav-shell{
  display:flex;align-items:center;gap:10px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-2);
  padding:10px 16px;
  min-height:72px;
}
.logo-mark{
  width:42px;height:42px;flex:none;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  background:var(--ink-900);
}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:10px}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 13px;border-radius:var(--r-sm);
  font-size:14px;font-weight:600;color:var(--text-2);
  transition:background .2s ease-out,color .2s ease-out,transform .2s ease-out;
  white-space:nowrap;
}
.nav-card svg{width:20px;height:20px;stroke-width:1.75;color:var(--text-3);transition:color .2s ease-out}
.nav-card:hover{background:var(--brand-soft);color:var(--brand)}
.nav-card:hover svg{color:var(--brand)}
.nav-card.is-active{background:var(--brand-soft);color:var(--brand)}
.nav-card.is-active svg{color:var(--brand)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:var(--r-sm);align-items:center;justify-content:center;color:var(--text-2);border:1px solid var(--line)}
.nav-toggle svg{width:22px;height:22px;stroke-width:1.75}
.nav-toggle:hover{background:var(--brand-soft);color:var(--brand)}
.nav-drawer{display:none}
.nav-drawer.is-open{display:block;position:fixed;inset:0;background:var(--surface);z-index:70;padding:20px 20px 32px;overflow-y:auto}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{width:44px;height:44px;border-radius:var(--r-sm);border:1px solid var(--line);display:flex;align-items:center;justify-content:center}
.drawer-close svg{width:22px;height:22px;stroke-width:1.75}
.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px}
.drawer-card{display:flex;align-items:center;gap:10px;padding:14px 12px;border:1px solid var(--line);border-radius:var(--r-sm);font-size:14.5px;font-weight:600;color:var(--text-2)}
.drawer-card svg{width:20px;height:20px;stroke-width:1.75;color:var(--brand)}
.drawer-card.is-active{background:var(--brand-soft);border-color:rgba(108,76,241,.28);color:var(--brand)}

/* ---------- 按钮 ---------- */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--accent);color:var(--ink-900);
  font-weight:700;font-size:15px;height:46px;padding:0 24px;
  border-radius:999px;border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease-out,box-shadow .18s ease-out,background .18s ease-out;
}
.btn-primary:hover{background:#d8ff74;transform:translateY(-2px);box-shadow:0 10px 24px rgba(200,255,77,.35)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:transparent;color:var(--brand);
  font-weight:700;font-size:15px;height:46px;padding:0 22px;
  border-radius:999px;border:1.5px solid var(--brand);cursor:pointer;
  transition:background .18s ease-out,transform .18s ease-out,color .18s ease-out;
}
.btn-ghost:hover{background:rgba(108,76,241,.08);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:40px;font-size:14px;padding:0 18px}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:14.5px;
  color:var(--brand);position:relative;padding-bottom:2px;
}
.btn-text::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--accent);transition:width .24s ease-out}
.btn-text:hover::after{width:100%}

/* ---------- 通用标签 / 徽章 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:999px;font-size:12.5px;font-weight:700;letter-spacing:.02em}
.badge-brand{background:var(--brand-soft);color:var(--brand)}
.badge-accent{background:var(--accent);color:var(--ink-900)}
.badge-dark{background:rgba(200,255,77,.12);color:var(--accent);border:1px solid rgba(200,255,77,.28)}

/* ---------- 文章头图区 ---------- */
.article-hero{
  position:relative;overflow:hidden;
  background:var(--ink-900);color:var(--dark-text);
  padding:52px 0 60px;margin-bottom:44px;
}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:100% 6px;pointer-events:none;
}
.article-hero::after{
  content:"";position:absolute;right:-80px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(108,76,241,.42),rgba(108,76,241,0) 68%);
  pointer-events:none;
}
.hero-dots{
  position:absolute;right:36px;bottom:28px;width:96px;height:96px;opacity:.14;pointer-events:none;
  background-image:radial-gradient(var(--accent) 2.2px,transparent 2.3px);
  background-size:32px 32px;
}
.crumbs{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--dark-text-2);margin-bottom:22px}
.crumbs a{color:var(--dark-text-2);transition:color .2s ease-out}
.crumbs a:hover{color:var(--accent)}
.crumbs span.sep{color:rgba(201,198,222,.5)}
.crumbs .current{color:var(--dark-text);font-weight:600}
.article-hero h1{
  position:relative;z-index:2;
  margin:18px 0 0;
  font-size:clamp(28px,5vw,44px);
  line-height:1.25;font-weight:800;letter-spacing:.01em;
  color:var(--dark-text);
  max-width:900px;
}
.meta-row{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:22px;font-size:14px;color:var(--dark-text-2)}
.meta-item{display:inline-flex;align-items:center;gap:7px}
.meta-item svg{width:17px;height:17px;stroke-width:1.75;color:var(--accent-2)}

/* ---------- 正文布局 ---------- */
.article-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:48px;align-items:start;padding-bottom:56px}
.article-toc{position:sticky;top:120px}
.toc-title{font-size:12.5px;font-weight:700;letter-spacing:.12em;color:var(--text-3);text-transform:uppercase;margin:0 0 14px}
.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px;border-left:1px solid var(--line)}
.toc-list a{display:block;padding:8px 0 8px 14px;font-size:14px;color:var(--text-2);border-left:2px solid transparent;margin-left:-1px;transition:color .2s ease-out,border-color .2s ease-out,padding-left .2s ease-out}
.toc-list a:hover{color:var(--brand);border-left-color:var(--brand);padding-left:18px}
.article-panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:44px 48px 40px;
  position:relative;
  overflow:hidden;
}
.article-panel::before{
  content:"";position:absolute;left:0;top:0;width:64px;height:8px;
  background:var(--accent);border-bottom-right-radius:10px;
}
.article-body{max-width:760px;color:var(--text)}
.article-body p{margin:0 0 20px;font-size:16.5px;line-height:1.9;color:var(--text-2)}
.article-body h2{
  position:relative;margin:44px 0 18px;padding-left:16px;
  font-size:24px;line-height:1.4;font-weight:700;color:var(--text);
}
.article-body h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:3px;background:var(--brand)}
.article-body h3{margin:32px 0 14px;font-size:19px;line-height:1.45;font-weight:700;color:var(--text)}
.article-body ul,.article-body ol{margin:0 0 22px;padding-left:0;list-style:none}
.article-body li{position:relative;padding-left:22px;margin-bottom:10px;font-size:16.5px;line-height:1.9;color:var(--text-2)}
.article-body ul li::before{content:"";position:absolute;left:0;top:12px;width:8px;height:8px;border-radius:2px;background:var(--accent)}
.article-body ol{counter-reset:li}
.article-body ol li{counter-increment:li}
.article-body ol li::before{
  content:counter(li);position:absolute;left:0;top:4px;width:20px;height:20px;border-radius:50%;
  background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;background:#F7F5FF;border-left:3px solid var(--accent);
  border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--text-2);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:14px;margin:26px 0;width:100%}
.article-body a{color:var(--brand);text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:3px}
.article-body a:hover{color:#5438c9}
.article-body strong{color:var(--text);font-weight:700}
.article-body code{background:var(--brand-soft);color:#4b2fc4;padding:2px 7px;border-radius:6px;font-size:14.5px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}

.empty-state{text-align:center;padding:64px 16px}
.empty-state .empty-ico{
  width:64px;height:64px;margin:0 auto 18px;border-radius:18px;
  background:var(--brand-soft);display:flex;align-items:center;justify-content:center;
}
.empty-state .empty-ico svg{width:30px;height:30px;stroke-width:1.75;color:var(--brand)}
.empty-state h2{margin:0 0 8px;font-size:20px;font-weight:700}
.empty-state p{margin:0 0 22px;color:var(--text-2);font-size:15px}

.article-foot{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:38px;padding-top:26px;border-top:1px solid var(--line)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-right:auto}
.tag{display:inline-flex;padding:6px 14px;border-radius:999px;background:var(--bg);border:1px solid var(--line);font-size:13px;color:var(--text-2);transition:all .2s ease-out}
.tag:hover{border-color:rgba(122,92,255,.35);color:var(--brand);background:var(--brand-soft)}

/* ---------- 相关推荐 ---------- */
.section{padding:72px 0}
.section-head{max-width:720px;margin-bottom:36px}
.section-head h2{margin:0 0 10px;font-size:clamp(22px,3.2vw,32px);line-height:1.3;font-weight:700}
.section-head p{margin:0;color:var(--text-2);font-size:16px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:.14em;color:var(--brand);margin-bottom:12px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .22s ease-out,box-shadow .22s ease-out,border-color .22s ease-out;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(122,92,255,.35)}
.media-frame{position:relative;overflow:hidden;background:var(--brand-soft);border-radius:0}
.media-frame img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .6s ease-out}
.card:hover .media-frame img{transform:scale(1.04)}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{margin:0;font-size:18px;line-height:1.45;font-weight:700;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body p{margin:0;font-size:14.5px;line-height:1.8;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-link{margin-top:auto;display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--brand)}
.card-link svg{width:16px;height:16px;stroke-width:2;transition:transform .2s ease-out}
.card:hover .card-link svg{transform:translateX(4px)}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink-900);color:var(--dark-text);
  border-radius:var(--r-lg);
  padding:48px 52px;
  display:flex;flex-wrap:wrap;align-items:center;gap:28px;
  box-shadow:var(--sh-3);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:100% 6px;pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;left:-60px;bottom:-140px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(41,224,214,.22),rgba(41,224,214,0) 70%);pointer-events:none;
}
.cta-copy{position:relative;z-index:2;flex:1 1 380px;min-width:260px}
.cta-copy h2{margin:0 0 10px;font-size:clamp(22px,3vw,30px);line-height:1.3;font-weight:700;color:#fff}
.cta-copy p{margin:0;color:var(--dark-text-2);font-size:15.5px;max-width:520px}
.cta-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:var(--dark-text-2);padding:64px 0 28px;margin-top:24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-desc{margin:16px 0 18px;font-size:14.5px;line-height:1.85;color:#9d9ab6;max-width:320px}
.footer-social{display:flex;gap:10px}
.footer-social a{
  width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,.14);color:var(--dark-text-2);
  transition:all .2s ease-out;
}
.footer-social a:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.footer-social svg{width:19px;height:19px}
.footer-title{margin:0 0 16px;font-size:15px;font-weight:700;color:#fff}
.footer-links{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14.5px;color:#a8a5bd;transition:color .2s ease-out,transform .2s ease-out;display:inline-block}
.footer-links a:hover{color:var(--accent);transform:translateX(2px)}
.footer-contact{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px;font-size:14.5px;color:#a8a5bd}
.footer-contact li{display:flex;gap:9px;align-items:flex-start}
.footer-contact svg{width:17px;height:17px;flex:none;margin-top:4px;stroke-width:1.75;color:var(--accent-2)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.09);
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13.5px;color:#8b88a3;
}
.footer-bottom .spacer{margin-left:auto}
.to-top{
  width:42px;height:42px;border-radius:50%;border:1.5px solid var(--accent);color:var(--accent);
  display:flex;align-items:center;justify-content:center;transition:all .2s ease-out;
}
.to-top:hover{background:rgba(200,255,77,.12);transform:translateY(-2px)}
.to-top svg{width:18px;height:18px;stroke-width:2}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .article-toc{display:none}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .nav-shell{min-height:68px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .article-panel{padding:36px 32px 32px}
  .section{padding:60px 0}
}
@media (max-width:767px){
  body{font-size:16px}
  body .container{padding:0 20px}
  .article-hero{padding:38px 0 44px;margin-bottom:32px}
  .article-layout{gap:0;padding-bottom:40px}
  .article-panel{padding:28px 22px 26px;border-radius:var(--r-md)}
  .article-body p,.article-body li{font-size:16px}
  .article-body h2{font-size:21px;margin-top:34px}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .cta-band{padding:34px 24px;border-radius:var(--r-md)}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .section{padding:52px 0}
  .site-header{padding:10px 0 8px}
}
@media (max-width:520px){
  .nav-shell{padding:8px 12px;gap:8px}
  .nav-right .btn-primary{display:none}
  .article-hero h1{font-size:26px}
  .hero-dots{display:none}
  .crumbs{font-size:13px;gap:6px}
}

/* roulang page: category2 */
:root{
    --brand:#6C4CF1;
    --brand-hover:#7A5CFF;
    --brand-soft:#ECE7FF;
    --accent:#C8FF4D;
    --accent-dim:#D6FF6E;
    --electric:#29E0D6;
    --ink-900:#12101F;
    --ink-700:#1C1836;
    --bg:#F5F5FA;
    --surface:#FFFFFF;
    --line:#E7E5F2;
    --text:#1A1730;
    --text-2:#5C5A72;
    --text-3:#8B89A0;
    --dark-text:#FFFFFF;
    --dark-text-2:#C9C6DE;
    --success:#22C55E;
    --warning:#F59E0B;
    --danger:#E5484D;
    --r-xs:10px;
    --r-sm:12px;
    --r-md:16px;
    --r-lg:20px;
    --r-xl:24px;
    --sh-1:0 2px 8px rgba(18,16,31,.04);
    --sh-2:0 8px 24px rgba(122,92,255,.10);
    --sh-3:0 18px 40px rgba(122,92,255,.18);
    --font: system-ui, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", Inter, sans-serif;
    --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  }

  *,*::before,*::after{ box-sizing:border-box; }
  html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
  body{
    margin:0;
    font-family:var(--font);
    font-size:16px;
    line-height:1.8;
    color:var(--text);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
  }
  img{ max-width:100%; display:block; }
  a{ color:inherit; text-decoration:none; }
  button{ font:inherit; color:inherit; background:none; border:0; cursor:pointer; }
  ul,ol{ margin:0; padding:0; list-style:none; }
  h1,h2,h3,h4,p{ margin:0; }
  [id]{ scroll-margin-top:110px; }

  .container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 16px;
  }
  @media (min-width:768px){ .container{ padding:0 24px; } }
  @media (min-width:1280px){ .container{ padding:0 32px; } }

  /* ---------- header / nav ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    padding:14px 0 10px;
    background:var(--bg);
  }
  .site-header.is-scrolled .nav-shell{
    box-shadow:0 10px 30px rgba(18,16,31,.10);
    border-color:#DEDBF0;
  }
  .header-inner{ position:relative; }
  .nav-shell{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    min-height:76px;
    padding:10px 16px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    box-shadow:var(--sh-2);
    transition:box-shadow .24s ease-out, border-color .24s ease-out;
  }
  @media (min-width:768px){ .nav-shell{ padding:10px 20px; } }
  .logo-mark{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:40px;
    height:40px;
    border-radius:var(--r-sm);
    background:linear-gradient(140deg,#1C1836,#12101F);
    flex:0 0 auto;
  }
  .nav-card{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:8px 12px;
    border-radius:var(--r-xs);
    font-size:14.5px;
    font-weight:600;
    color:var(--text-2);
    white-space:nowrap;
    transition:background .18s ease-out, color .18s ease-out, transform .18s ease-out;
  }
  .nav-card svg{
    width:20px;
    height:20px;
    stroke-width:1.75;
    color:var(--text-3);
    transition:color .18s ease-out;
  }
  .nav-card:hover{ background:var(--brand-soft); color:var(--brand); transform:translateY(-1px); }
  .nav-card:hover svg{ color:var(--brand); }
  .nav-card.is-active{ background:var(--brand-soft); color:var(--brand); }
  .nav-card.is-active svg{ color:var(--brand); }
  .nav-card:focus-visible,
  .nav-toggle:focus-visible,
  .footer-links a:focus-visible,
  .footer-social a:focus-visible{
    outline:2px solid var(--accent);
    outline-offset:2px;
    border-radius:var(--r-xs);
  }
  .nav-toggle{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:42px;
    height:42px;
    border-radius:var(--r-xs);
    border:1px solid var(--line);
    color:var(--text);
    transition:background .18s ease-out, border-color .18s ease-out;
  }
  .nav-toggle:hover{ background:var(--brand-soft); border-color:rgba(122,92,255,.35); color:var(--brand); }
  .nav-toggle svg{ width:22px; height:22px; stroke-width:1.75; }

  .mobile-drawer{
    position:absolute;
    left:0;
    right:0;
    top:calc(100% + 10px);
    z-index:70;
    padding:16px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    box-shadow:var(--sh-3);
  }
  .mobile-drawer[hidden]{ display:none; }
  .drawer-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:10px;
    margin-bottom:14px;
  }
  .drawer-card{
    display:flex;
    align-items:center;
    gap:8px;
    padding:12px;
    border-radius:var(--r-xs);
    border:1px solid var(--line);
    font-size:14.5px;
    font-weight:600;
    color:var(--text-2);
    transition:background .18s ease-out, color .18s ease-out, border-color .18s ease-out;
  }
  .drawer-card svg{ width:20px; height:20px; stroke-width:1.75; color:var(--text-3); }
  .drawer-card:hover, .drawer-card.is-active{
    background:var(--brand-soft);
    border-color:rgba(122,92,255,.28);
    color:var(--brand);
  }
  .drawer-card:hover svg, .drawer-card.is-active svg{ color:var(--brand); }

  /* ---------- buttons ---------- */
  .btn-primary{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:12px 22px;
    border-radius:999px;
    background:var(--accent);
    color:var(--ink-900);
    font-weight:700;
    font-size:15px;
    line-height:1.2;
    box-shadow:0 6px 18px rgba(200,255,77,.30);
    transition:transform .18s ease-out, background .18s ease-out, box-shadow .18s ease-out;
  }
  .btn-primary:hover{ background:var(--accent-dim); transform:translateY(-2px); box-shadow:0 12px 26px rgba(200,255,77,.36); }
  .btn-primary:active{ transform:translateY(0); box-shadow:0 4px 12px rgba(200,255,77,.28); }
  .btn-primary:focus-visible{ outline:2px solid var(--ink-900); outline-offset:2px; }
  .btn-primary svg{ width:18px; height:18px; stroke-width:2; }

  .btn-ghost{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:11px 22px;
    border-radius:999px;
    border:1.5px solid var(--brand);
    color:var(--brand);
    font-weight:700;
    font-size:15px;
    line-height:1.2;
    transition:background .18s ease-out, transform .18s ease-out, color .18s ease-out;
  }
  .btn-ghost:hover{ background:rgba(108,76,241,.08); transform:translateY(-2px); }
  .btn-ghost:active{ transform:translateY(0); }
  .btn-ghost:focus-visible{ outline:2px solid var(--accent); outline-offset:2px; }
  .btn-ghost svg{ width:18px; height:18px; stroke-width:1.9; }

  .btn-ghost-light{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:11px 22px;
    border-radius:999px;
    border:1.5px solid rgba(255,255,255,.42);
    color:#fff;
    font-weight:700;
    font-size:15px;
    line-height:1.2;
    transition:background .18s ease-out, border-color .18s ease-out, transform .18s ease-out;
  }
  .btn-ghost-light:hover{ background:rgba(255,255,255,.10); border-color:#fff; transform:translateY(-2px); }
  .btn-ghost-light:focus-visible{ outline:2px solid var(--accent); outline-offset:2px; }

  .link-inline{
    color:var(--brand);
    font-weight:600;
    border-bottom:2px solid rgba(108,76,241,.28);
    transition:border-color .18s ease-out, color .18s ease-out;
  }
  .link-inline:hover{ color:var(--brand-hover); border-color:var(--brand-hover); }

  /* ---------- badges & tags ---------- */
  .badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:5px 12px;
    border-radius:999px;
    background:var(--brand-soft);
    color:var(--brand);
    font-size:12.5px;
    font-weight:700;
    letter-spacing:.02em;
  }
  .badge-accent{ background:rgba(200,255,77,.22); color:#3A5300; }
  .badge-dark{ background:rgba(255,255,255,.10); color:var(--dark-text-2); }
  .tag-row{ display:flex; flex-wrap:wrap; gap:10px; }
  .tag{
    display:inline-flex;
    align-items:center;
    gap:7px;
    padding:7px 13px;
    border-radius:999px;
    background:#fff;
    border:1px solid var(--line);
    font-size:13.5px;
    color:var(--text-2);
    font-weight:600;
  }
  .tag svg{ width:16px; height:16px; stroke-width:1.9; color:var(--brand); }

  /* ---------- hero ---------- */
  .page-hero{ padding:8px 0 0; }
  .hero-panel{
    position:relative;
    overflow:hidden;
    border-radius:var(--r-xl);
    padding:40px 22px 36px;
    color:#fff;
    background-color:var(--ink-900);
    background-image:
      linear-gradient(180deg, rgba(18,16,31,.86), rgba(18,16,31,.92)),
      url('/assets/images/backpic/back-2.png');
    background-size:cover;
    background-position:center;
    border:1px solid rgba(255,255,255,.06);
  }
  @media (min-width:768px){ .hero-panel{ padding:56px 48px 52px; } }
  .hero-panel::before{
    content:"";
    position:absolute;
    inset:0;
    background:radial-gradient(620px 320px at 88% 8%, rgba(108,76,241,.42), transparent 72%);
    pointer-events:none;
  }
  .hero-panel::after{
    content:"";
    position:absolute;
    inset:0;
    background-image:repeating-linear-gradient(to bottom, rgba(255,255,255,.045) 0 1px, transparent 1px 6px);
    pointer-events:none;
  }
  .hero-inner{ position:relative; z-index:2; }
  .dot-grid{
    position:absolute;
    right:26px;
    bottom:22px;
    width:74px;
    height:74px;
    background-image:radial-gradient(rgba(200,255,77,.6) 1.6px, transparent 1.6px);
    background-size:8px 8px;
    opacity:.45;
    pointer-events:none;
    z-index:1;
  }
  .dot-grid.top-left{ left:26px; top:22px; right:auto; bottom:auto; opacity:.3; }
  .breadcrumb{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px;
    font-size:13.5px;
    color:var(--dark-text-2);
    margin-bottom:18px;
  }
  .breadcrumb a{ color:var(--dark-text-2); transition:color .18s ease-out; }
  .breadcrumb a:hover{ color:var(--accent); }
  .breadcrumb .sep{ color:rgba(255,255,255,.35); }
  .breadcrumb .current{ color:#fff; font-weight:600; }
  .hero-title{
    font-size:clamp(28px,5vw,44px);
    line-height:1.25;
    font-weight:800;
    letter-spacing:.01em;
    max-width:820px;
  }
  .hero-sub{
    margin-top:18px;
    max-width:680px;
    font-size:16.5px;
    line-height:1.85;
    color:var(--dark-text-2);
  }
  .hero-actions{
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    margin-top:28px;
  }
  .hero-trust{
    display:flex;
    flex-wrap:wrap;
    gap:10px 22px;
    margin-top:28px;
    padding-top:22px;
    border-top:1px solid rgba(255,255,255,.12);
  }
  .hero-trust li{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:13.5px;
    color:var(--dark-text-2);
  }
  .hero-trust svg{ width:17px; height:17px; stroke-width:1.9; color:var(--accent); }

  /* ---------- sections ---------- */
  .section{ padding:56px 0; }
  @media (min-width:768px){ .section{ padding:80px 0; } }
  @media (min-width:1024px){ .section{ padding:96px 0; } }
  .section-tight{ padding:44px 0; }
  @media (min-width:1024px){ .section-tight{ padding:56px 0; } }
  .section-head{ max-width:720px; margin-bottom:34px; }
  .section-head h2{
    margin-top:14px;
    font-size:clamp(22px,3.2vw,32px);
    line-height:1.3;
    font-weight:700;
    letter-spacing:.01em;
  }
  .section-head p{
    margin-top:14px;
    font-size:16.5px;
    color:var(--text-2);
  }

  /* ---------- cards ---------- */
  .card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    box-shadow:var(--sh-1);
    transition:transform .22s ease-out, box-shadow .22s ease-out, border-color .22s ease-out;
  }
  .card:hover{
    transform:translateY(-4px);
    box-shadow:var(--sh-2);
    border-color:rgba(122,92,255,.35);
  }
  .quick-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:16px;
  }
  @media (min-width:640px){ .quick-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); } }
  @media (min-width:1024px){ .quick-grid{ grid-template-columns:repeat(4,minmax(0,1fr)); } }
  .quick-card{
    position:relative;
    padding:24px 22px;
    border-radius:var(--r-md);
    background:var(--surface);
    border:1px solid var(--line);
    box-shadow:var(--sh-1);
    transition:transform .22s ease-out, box-shadow .22s ease-out, border-color .22s ease-out;
  }
  .quick-card:hover{
    transform:translateY(-4px);
    box-shadow:var(--sh-2);
    border-color:rgba(122,92,255,.35);
  }
  .icon-box{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:44px;
    height:44px;
    border-radius:var(--r-xs);
    background:var(--brand-soft);
    color:var(--brand);
    margin-bottom:16px;
  }
  .icon-box svg{ width:22px; height:22px; stroke-width:1.75; }
  .quick-card h3{ font-size:17.5px; font-weight:700; margin-bottom:8px; }
  .quick-card p{ font-size:14.5px; color:var(--text-2); line-height:1.78; }

  /* ---------- split layout ---------- */
  .split-layout{
    display:grid;
    grid-template-columns:1fr;
    gap:28px;
  }
  @media (min-width:1024px){
    .split-layout{ grid-template-columns:240px minmax(0,1fr); gap:40px; align-items:start; }
  }
  .toc-panel{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    padding:18px;
    box-shadow:var(--sh-1);
  }
  @media (min-width:1024px){
    .toc-panel{ position:sticky; top:106px; }
  }
  .toc-title{
    font-size:13px;
    font-weight:700;
    letter-spacing:.08em;
    color:var(--text-3);
    margin-bottom:12px;
  }
  .toc-list li + li{ margin-top:4px; }
  .toc-list a{
    display:block;
    padding:9px 12px;
    border-radius:var(--r-xs);
    font-size:14.5px;
    font-weight:600;
    color:var(--text-2);
    border-left:3px solid transparent;
    transition:background .18s ease-out, color .18s ease-out, border-color .18s ease-out;
  }
  .toc-list a:hover{ background:#F5F5FA; color:var(--brand); }
  .toc-list a.is-current{
    background:var(--brand-soft);
    color:var(--brand);
    border-left-color:var(--accent);
  }
  .toc-note{
    margin-top:16px;
    padding:14px;
    border-radius:var(--r-xs);
    background:#F5F5FA;
    font-size:13px;
    line-height:1.7;
    color:var(--text-2);
  }

  .content-flow{ display:grid; gap:20px; }
  .content-flow > h2{
    font-size:clamp(21px,3vw,28px);
    font-weight:700;
    line-height:1.35;
    padding-left:14px;
    border-left:4px solid var(--brand);
    margin-bottom:6px;
  }
  .section-card{
    position:relative;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    padding:26px 22px;
    box-shadow:var(--sh-1);
    overflow:hidden;
    transition:transform .22s ease-out, box-shadow .22s ease-out, border-color .22s ease-out;
  }
  @media (min-width:768px){ .section-card{ padding:30px 30px; } }
  .section-card::before{
    content:"";
    position:absolute;
    top:0;
    left:0;
    width:16px;
    height:16px;
    background:var(--brand-soft);
    clip-path:polygon(0 0, 100% 0, 0 100%);
    pointer-events:none;
  }
  .section-card:hover{
    transform:translateY(-4px);
    box-shadow:var(--sh-2);
    border-color:rgba(122,92,255,.35);
  }
  .card-head{
    display:flex;
    align-items:center;
    gap:14px;
    margin-bottom:14px;
  }
  .step-num{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:34px;
    height:34px;
    flex:0 0 auto;
    border-radius:50%;
    border:1.5px solid var(--brand);
    background:var(--brand-soft);
    color:var(--brand);
    font-weight:700;
    font-size:14px;
  }
  .section-card h3{ font-size:19px; font-weight:700; line-height:1.4; }
  .section-card p{ font-size:16px; color:var(--text-2); line-height:1.9; }
  .section-card p + p{ margin-top:14px; }
  .check-list{ margin-top:16px; display:grid; gap:10px; }
  .check-list li{
    position:relative;
    padding-left:22px;
    font-size:15px;
    color:var(--text-2);
    line-height:1.8;
  }
  .check-list li::before{
    content:"";
    position:absolute;
    left:0;
    top:.62em;
    width:8px;
    height:8px;
    border-radius:2px;
    background:var(--accent);
  }
  .ordered-list{ margin-top:16px; display:grid; gap:10px; counter-reset:ord; }
  .ordered-list li{
    position:relative;
    padding-left:30px;
    font-size:15px;
    color:var(--text-2);
    line-height:1.8;
  }
  .ordered-list li::before{
    counter-increment:ord;
    content:counter(ord);
    position:absolute;
    left:0;
    top:.18em;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:20px;
    height:20px;
    border-radius:50%;
    background:var(--brand-soft);
    color:var(--brand);
    font-size:11.5px;
    font-weight:700;
  }
  .inline-figure{
    margin-top:20px;
    border-radius:14px;
    overflow:hidden;
    border:1px solid var(--line);
  }
  .inline-figure img{
    width:100%;
    height:auto;
    aspect-ratio:16/9;
    object-fit:cover;
    transition:transform .6s ease-out;
  }
  .inline-figure:hover img{ transform:scale(1.04); }
  .inline-figure figcaption{
    padding:10px 14px;
    font-size:13px;
    color:var(--text-3);
    background:#FAFAFD;
    border-top:1px solid var(--line);
  }

  /* ---------- scene cards ---------- */
  .scene-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:22px;
  }
  @media (min-width:768px){ .scene-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); } }
  @media (min-width:1024px){ .scene-grid{ grid-template-columns:repeat(3,minmax(0,1fr)); } }
  .scene-card{
    display:flex;
    flex-direction:column;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    overflow:hidden;
    box-shadow:var(--sh-1);
    transition:transform .22s ease-out, box-shadow .22s ease-out, border-color .22s ease-out;
  }
  .scene-card:hover{
    transform:translateY(-4px);
    box-shadow:var(--sh-2);
    border-color:rgba(122,92,255,.35);
  }
  .media-frame{
    aspect-ratio:16/9;
    overflow:hidden;
    background:var(--brand-soft);
  }
  .media-frame img{
    width:100%;
    height:100%;
    object-fit:cover;
    transition:transform .6s ease-out;
  }
  .scene-card:hover .media-frame img{ transform:scale(1.04); }
  .scene-body{ padding:20px 20px 22px; display:flex; flex-direction:column; gap:10px; flex:1; }
  .scene-body h3{ font-size:17.5px; font-weight:700; line-height:1.45; }
  .scene-body p{ font-size:14.5px; color:var(--text-2); line-height:1.78; }
  .scene-more{
    margin-top:auto;
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:14px;
    font-weight:700;
    color:var(--brand);
  }
  .scene-more svg{ width:16px; height:16px; stroke-width:2; transition:transform .18s ease-out; }
  .scene-card:hover .scene-more svg{ transform:translateX(3px); }

  /* ---------- steps band ---------- */
  .steps-band{
    position:relative;
    overflow:hidden;
    border-radius:var(--r-xl);
    padding:40px 22px;
    background-color:var(--ink-900);
    background-image:linear-gradient(180deg, rgba(18,16,31,.9), rgba(28,24,54,.94));
    color:#fff;
    border:1px solid rgba(255,255,255,.06);
  }
  @media (min-width:768px){ .steps-band{ padding:56px 48px; } }
  .steps-band::after{
    content:"";
    position:absolute;
    inset:0;
    background-image:repeating-linear-gradient(to bottom, rgba(255,255,255,.04) 0 1px, transparent 1px 6px);
    pointer-events:none;
  }
  .steps-inner{ position:relative; z-index:2; }
  .steps-head{ max-width:640px; margin-bottom:32px; }
  .steps-head h2{
    margin-top:14px;
    font-size:clamp(22px,3.2vw,32px);
    font-weight:700;
    line-height:1.3;
  }
  .steps-head p{ margin-top:12px; color:var(--dark-text-2); font-size:16px; }
  .steps-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:18px;
  }
  @media (min-width:640px){ .steps-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); } }
  @media (min-width:1024px){ .steps-grid{ grid-template-columns:repeat(4,minmax(0,1fr)); gap:22px; } }
  .step-item{
    position:relative;
    padding:22px 20px;
    border-radius:var(--r-md);
    background:var(--ink-700);
    border:1px solid rgba(255,255,255,.08);
    box-shadow:inset 0 0 0 1px rgba(200,255,77,.05);
    transition:transform .22s ease-out, border-color .22s ease-out;
  }
  .step-item:hover{ transform:translateY(-4px); border-color:rgba(200,255,77,.35); }
  .step-item .cn-num{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:34px;
    height:34px;
    border-radius:50%;
    border:1.5px solid rgba(108,76,241,.9);
    background:rgba(108,76,241,.22);
    color:#fff;
    font-size:14px;
    font-weight:700;
    margin-bottom:14px;
  }
  .step-item h3{ font-size:17px; font-weight:700; margin-bottom:8px; color:#fff; }
  .step-item p{ font-size:14.5px; color:var(--dark-text-2); line-height:1.78; }

  /* ---------- faq ---------- */
  .faq-wrap{ max-width:880px; margin:0 auto; }
  .faq-item{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    overflow:hidden;
    box-shadow:var(--sh-1);
    transition:border-color .2s ease-out, box-shadow .2s ease-out;
  }
  .faq-item + .faq-item{ margin-top:12px; }
  .faq-item[open]{
    border-left:3px solid var(--accent);
    box-shadow:var(--sh-2);
  }
  .faq-item summary{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:18px 20px;
    font-size:17px;
    font-weight:700;
    cursor:pointer;
    list-style:none;
    transition:color .18s ease-out;
  }
  .faq-item summary::-webkit-details-marker{ display:none; }
  .faq-item summary:hover{ color:var(--brand); }
  .faq-item summary:focus-visible{ outline:2px solid var(--accent); outline-offset:-3px; }
  .faq-icon{
    flex:0 0 auto;
    width:22px;
    height:22px;
    stroke-width:1.9;
    color:var(--brand);
    transition:transform .24s ease-out;
  }
  .faq-item[open] .faq-icon{ transform:rotate(180deg); }
  .faq-answer{
    padding:0 20px 20px;
    font-size:15px;
    line-height:1.9;
    color:var(--text-2);
  }

  /* ---------- cta ---------- */
  .cta-band{
    position:relative;
    overflow:hidden;
    border-radius:var(--r-xl);
    padding:40px 22px;
    background-color:var(--ink-900);
    background-image:
      linear-gradient(180deg, rgba(18,16,31,.88), rgba(18,16,31,.94)),
      url('/assets/images/backpic/back-1.webp');
    background-size:cover;
    background-position:center;
    color:#fff;
    text-align:center;
    border:1px solid rgba(255,255,255,.06);
  }
  @media (min-width:768px){ .cta-band{ padding:56px 40px; } }
  .cta-band::before{
    content:"";
    position:absolute;
    inset:0;
    background:radial-gradient(520px 260px at 50% 0%, rgba(108,76,241,.38), transparent 70%);
    pointer-events:none;
  }
  .cta-inner{ position:relative; z-index:2; max-width:720px; margin:0 auto; }
  .cta-inner h2{ font-size:clamp(22px,3.2vw,32px); font-weight:700; line-height:1.3; margin-top:14px; }
  .cta-inner p{ margin-top:14px; color:var(--dark-text-2); font-size:16px; }
  .cta-actions{ display:flex; flex-wrap:wrap; gap:12px; justify-content:center; margin-top:28px; }

  /* ---------- footer ---------- */
  .site-footer{
    margin-top:56px;
    background:var(--ink-900);
    color:var(--dark-text-2);
    padding:56px 0 24px;
    border-top:1px solid rgba(255,255,255,.06);
  }
  @media (min-width:1024px){ .site-footer{ margin-top:96px; padding:72px 0 28px; } }
  .footer-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:32px;
  }
  @media (min-width:768px){ .footer-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); } }
  @media (min-width:1024px){ .footer-grid{ grid-template-columns:1.5fr 1fr 1fr 1fr; gap:40px; } }
  .footer-desc{
    margin-top:16px;
    font-size:14px;
    line-height:1.85;
    color:var(--dark-text-2);
    max-width:320px;
  }
  .footer-social{ display:flex; gap:10px; margin-top:20px; }
  .footer-social a{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:38px;
    height:38px;
    border-radius:var(--r-xs);
    border:1px solid rgba(255,255,255,.12);
    color:var(--dark-text-2);
    transition:color .18s ease-out, border-color .18s ease-out, background .18s ease-out;
  }
  .footer-social a:hover{ color:var(--accent); border-color:rgba(200,255,77,.5); background:rgba(200,255,77,.06); }
  .footer-social svg{ width:19px; height:19px; }
  .footer-title{
    font-size:15px;
    font-weight:700;
    color:#fff;
    margin-bottom:16px;
  }
  .footer-links li + li{ margin-top:10px; }
  .footer-links a{
    display:inline-block;
    font-size:14px;
    color:#A8A5BD;
    transition:color .18s ease-out, transform .18s ease-out;
  }
  .footer-links a:hover{ color:var(--accent); transform:translateX(2px); }
  .footer-info li{
    font-size:14px;
    line-height:1.85;
    color:#A8A5BD;
  }
  .footer-info li + li{ margin-top:10px; }
  .footer-info strong{ color:#fff; font-weight:600; }
  .footer-bottom{
    margin-top:40px;
    padding-top:22px;
    border-top:1px solid rgba(255,255,255,.08);
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    font-size:13.5px;
    color:#8B89A0;
  }
  .to-top{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:42px;
    height:42px;
    border-radius:50%;
    border:1.5px solid var(--accent);
    color:var(--accent);
    transition:background .18s ease-out, transform .18s ease-out;
  }
  .to-top:hover{ background:rgba(200,255,77,.12); transform:translateY(-2px); }
  .to-top:focus-visible{ outline:2px solid var(--accent); outline-offset:3px; }
  .to-top svg{ width:20px; height:20px; stroke-width:1.9; }

  @media (prefers-reduced-motion: reduce){
    *{ transition:none !important; animation:none !important; scroll-behavior:auto !important; }
  }

/* roulang page: category3 */
:root{
    --brand:#6C4CF1;
    --brand-hover:#7A5CFF;
    --brand-soft:#ECE7FF;
    --accent:#C8FF4D;
    --accent-2:#29E0D6;
    --ink-900:#12101F;
    --ink-700:#1C1836;
    --bg:#F5F5FA;
    --surface:#FFFFFF;
    --line:#E7E5F2;
    --text:#1A1730;
    --text-2:#5C5A72;
    --text-3:#8B89A0;
    --ok:#22C55E;
    --warn:#F59E0B;
    --err:#E5484D;
    --r-sm:10px;
    --r-md:16px;
    --r-lg:20px;
    --sh-1:0 2px 8px rgba(18,16,31,.04);
    --sh-2:0 8px 24px rgba(122,92,255,.10);
    --sh-3:0 18px 40px rgba(122,92,255,.18);
    --t:180ms ease-out;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:Inter,system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16.5px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{max-width:100%;display:block;border:0}
  a{color:inherit;text-decoration:none}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  input{font:inherit}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:8px}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
  @media (min-width:640px){.container{padding:0 24px}}
  @media (min-width:1024px){.container{padding:0 32px}}

  /* ---------- header / nav ---------- */
  .site-header{
    position:sticky;top:0;z-index:50;
    padding:12px 0 10px;
    background:rgba(245,245,250,.88);
    backdrop-filter:blur(10px);
    transition:box-shadow var(--t),border-color var(--t);
    border-bottom:1px solid transparent;
  }
  .site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 20px rgba(18,16,31,.06)}
  .nav-shell{
    display:flex;align-items:center;gap:14px;
    min-height:72px;
    padding:10px 14px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    box-shadow:var(--sh-2);
  }
  .logo-mark{
    width:42px;height:42px;flex:none;
    display:grid;place-items:center;
    border-radius:12px;
    background:var(--ink-900);
    box-shadow:inset 0 0 0 1px rgba(200,255,77,.14);
  }
  .nav-card{
    display:inline-flex;align-items:center;gap:8px;
    padding:9px 13px;
    border-radius:var(--r-sm);
    font-size:14.5px;font-weight:600;color:var(--text-2);
    border:1px solid transparent;
    transition:background var(--t),color var(--t),border-color var(--t),transform var(--t);
    white-space:nowrap;
  }
  .nav-card svg{width:20px;height:20px;flex:none;stroke:currentColor;stroke-width:1.75;fill:none;stroke-linecap:round;stroke-linejoin:round}
  .nav-card:hover{background:var(--brand-soft);color:var(--brand);transform:translateY(-1px)}
  .nav-card.is-active{background:var(--brand-soft);color:var(--brand);border-color:rgba(108,76,241,.22)}
  .nav-card:active{transform:translateY(0) scale(.98)}

  .btn-primary{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 22px;
    border-radius:999px;
    background:var(--accent);
    color:var(--ink-900);
    font-weight:700;font-size:15px;
    letter-spacing:.01em;
    box-shadow:0 6px 18px rgba(200,255,77,.28);
    transition:transform var(--t),filter var(--t),box-shadow var(--t);
  }
  .btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 10px 24px rgba(200,255,77,.34)}
  .btn-primary:active{transform:translateY(0);filter:brightness(.96)}
  .btn-primary[disabled],.btn-primary.is-disabled{opacity:.5;filter:grayscale(.3);cursor:not-allowed;transform:none;box-shadow:none}

  .btn-ghost{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:11px 20px;
    border-radius:999px;
    border:1.5px solid var(--brand);
    color:var(--brand);
    font-weight:700;font-size:15px;
    background:transparent;
    transition:background var(--t),transform var(--t),color var(--t);
  }
  .btn-ghost:hover{background:rgba(108,76,241,.08);transform:translateY(-2px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-ghost-dark{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:11px 20px;border-radius:999px;
    border:1.5px solid rgba(255,255,255,.42);
    color:#fff;font-weight:700;font-size:15px;
    transition:background var(--t),transform var(--t),border-color var(--t);
  }
  .btn-ghost-dark:hover{background:rgba(255,255,255,.12);border-color:rgba(200,255,77,.7);transform:translateY(-2px)}
  .btn-text{
    display:inline-flex;align-items:center;gap:6px;
    font-weight:700;color:var(--brand);font-size:14.5px;
    position:relative;
  }
  .btn-text::after{content:"";position:absolute;left:0;right:0;bottom:-3px;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform 220ms ease-out}
  .btn-text:hover::after{transform:scaleX(1)}

  .nav-toggle{
    display:none;width:44px;height:44px;flex:none;
    align-items:center;justify-content:center;
    border-radius:12px;border:1px solid var(--line);
    color:var(--text);background:#fff;
    transition:background var(--t),color var(--t);
  }
  .nav-toggle:hover{background:var(--brand-soft);color:var(--brand)}
  .nav-toggle svg{width:22px;height:22px;stroke:currentColor;stroke-width:1.75;fill:none;stroke-linecap:round}
  @media (max-width:1023px){.nav-toggle{display:inline-flex}}

  .mobile-drawer{
    position:fixed;inset:0;z-index:80;
    background:var(--ink-900);
    padding:20px 18px 32px;
    display:flex;flex-direction:column;gap:18px;
    transform:translateY(-102%);
    transition:transform 280ms ease-out;
    overflow-y:auto;
  }
  .mobile-drawer.is-open{transform:translateY(0)}
  .drawer-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
  .drawer-card{
    display:flex;align-items:center;gap:10px;
    padding:14px 14px;
    border-radius:var(--r-md);
    background:var(--ink-700);
    border:1px solid rgba(255,255,255,.08);
    color:#fff;font-weight:600;font-size:15px;
    transition:background var(--t),border-color var(--t),transform var(--t);
  }
  .drawer-card svg{width:20px;height:20px;stroke:var(--accent);stroke-width:1.75;fill:none;stroke-linecap:round;stroke-linejoin:round}
  .drawer-card:hover{background:#262047;border-color:rgba(200,255,77,.4);transform:translateY(-2px)}
  .drawer-card.is-active{background:#262047;border-color:rgba(200,255,77,.5)}
  .drawer-close{width:44px;height:44px;display:grid;place-items:center;border-radius:12px;border:1px solid rgba(255,255,255,.16);color:#fff}
  .drawer-close svg{width:22px;height:22px;stroke:currentColor;stroke-width:1.75;fill:none;stroke-linecap:round}

  /* ---------- banner ---------- */
  .page-banner{
    position:relative;
    overflow:hidden;
    background:var(--ink-900);
    padding:56px 0 96px;
  }
  .page-banner::before{
    content:"";position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-3.webp');
    background-size:cover;background-position:center;
    opacity:.5;
  }
  .page-banner::after{
    content:"";position:absolute;inset:0;
    background:
      radial-gradient(680px 380px at 78% 18%,rgba(108,76,241,.42),transparent 62%),
      linear-gradient(180deg,rgba(18,16,31,.82),rgba(18,16,31,.94));
  }
  .banner-dots{
    position:absolute;right:6%;top:56px;width:120px;height:120px;z-index:2;
    background-image:radial-gradient(rgba(200,255,77,.55) 2px,transparent 2px);
    background-size:16px 16px;opacity:.5;pointer-events:none;
  }
  .banner-inner{position:relative;z-index:3;color:#fff}
  .crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:#C9C6DE;margin-bottom:20px;flex-wrap:wrap}
  .crumb a{color:#C9C6DE;transition:color var(--t)}
  .crumb a:hover{color:var(--accent)}
  .crumb .crumb-current{color:#fff;font-weight:600}
  .crumb span[aria-hidden]{color:rgba(255,255,255,.36)}
  .page-banner h1{
    font-size:clamp(28px,5vw,44px);
    line-height:1.25;font-weight:800;letter-spacing:.01em;
    max-width:760px;
  }
  .banner-lead{
    margin-top:18px;max-width:680px;
    font-size:16.5px;line-height:1.9;color:#C9C6DE;
  }
  .banner-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
  .chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
  .chip-row li{
    padding:6px 14px;border-radius:999px;
    font-size:13px;font-weight:600;color:#EDEBF8;
    background:rgba(255,255,255,.08);
    border:1px solid rgba(255,255,255,.14);
  }

  /* ---------- sections ---------- */
  .section{padding:72px 0}
  @media (min-width:768px){.section{padding:88px 0}}
  @media (min-width:1024px){.section{padding:104px 0}}
  .section-soft{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;font-weight:700;letter-spacing:.08em;
    color:var(--brand);text-transform:uppercase;
    margin-bottom:14px;
  }
  .eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px}
  .section-title{font-size:clamp(22px,3.2vw,32px);line-height:1.3;font-weight:700;letter-spacing:.01em}
  .section-sub{margin-top:14px;max-width:720px;color:var(--text-2);font-size:16px}
  .section-head{margin-bottom:40px}
  @media (min-width:1024px){.section-head{margin-bottom:52px}}

  /* ---------- overview band ---------- */
  .overview-band{position:relative;z-index:6;margin-top:-58px}
  .overview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
  .overview-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
    padding:20px 18px;box-shadow:var(--sh-1);
    transition:transform var(--t),box-shadow var(--t),border-color var(--t);
  }
  .overview-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(122,92,255,.35)}
  .ov-icon{
    width:38px;height:38px;border-radius:11px;
    display:grid;place-items:center;margin-bottom:12px;
    background:var(--brand-soft);color:var(--brand);
  }
  .ov-icon svg{width:20px;height:20px;stroke:currentColor;stroke-width:1.75;fill:none;stroke-linecap:round;stroke-linejoin:round}
  .overview-card h3{font-size:15.5px;font-weight:700;margin-bottom:6px}
  .overview-card p{font-size:13.5px;line-height:1.75;color:var(--text-2)}
  @media (max-width:1023px){.overview-grid{grid-template-columns:repeat(2,1fr)}}
  @media (max-width:639px){
    .overview-band{margin-top:-36px}
    .overview-grid{grid-template-columns:1fr;gap:12px}
  }

  /* ---------- alternating rows ---------- */
  .row-item{
    display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
    padding:32px 0;
  }
  .row-item + .row-item{border-top:1px dashed var(--line)}
  .row-item.reverse .row-copy{order:2}
  .row-item.reverse .row-media{order:1}
  .row-copy h3{font-size:clamp(19px,2.2vw,22px);font-weight:700;line-height:1.45;margin-bottom:14px}
  .row-copy p{color:var(--text-2);font-size:16px;margin-bottom:14px}
  .row-list li{
    position:relative;padding-left:20px;margin-bottom:9px;
    font-size:15px;color:var(--text-2);
  }
  .row-list li::before{
    content:"";position:absolute;left:0;top:11px;
    width:7px;height:7px;border-radius:2px;background:var(--accent);
  }
  .row-tag{
    display:inline-block;padding:5px 12px;border-radius:999px;
    background:var(--brand-soft);color:var(--brand);
    font-size:12.5px;font-weight:700;margin-bottom:14px;
  }
  .media-frame{
    position:relative;overflow:hidden;border-radius:var(--r-lg);
    border:1px solid var(--line);background:#fff;box-shadow:var(--sh-2);
  }
  .media-frame img{width:100%;height:100%;aspect-ratio:16/9;object-fit:cover;transition:transform 600ms ease}
  .media-frame:hover img{transform:scale(1.04)}
  @media (max-width:1023px){
    .row-item{grid-template-columns:1fr;gap:24px;padding:26px 0}
    .row-item.reverse .row-copy,.row-item.reverse .row-media{order:0}
  }

  /* ---------- steps ---------- */
  .steps-stack{display:grid;gap:16px;max-width:920px}
  .step-card{
    display:grid;grid-template-columns:64px 1fr;gap:20px;
    background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
    padding:22px 24px;box-shadow:var(--sh-1);
    transition:transform var(--t),box-shadow var(--t),border-color var(--t);
  }
  .step-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(122,92,255,.32)}
  .step-num{
    width:52px;height:52px;border-radius:50%;
    display:grid;place-items:center;
    border:1.5px solid rgba(108,76,241,.42);
    background:var(--brand-soft);color:var(--brand);
    font-size:17px;font-weight:800;
  }
  .step-card h3{font-size:17.5px;font-weight:700;margin-bottom:8px}
  .step-card p{font-size:15px;color:var(--text-2)}
  @media (max-width:639px){
    .step-card{grid-template-columns:1fr;gap:12px;padding:18px}
    .step-num{width:44px;height:44px;font-size:15px}
  }

  /* ---------- compose list (compatibility) ---------- */
  .split-list{display:grid;grid-template-columns:300px 1fr;gap:48px;align-items:start}
  .info-list{display:grid;gap:14px}
  .info-item{
    display:grid;grid-template-columns:28px 1fr;gap:14px;
    padding:18px 20px;
    background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
    transition:border-color var(--t),box-shadow var(--t),transform var(--t);
  }
  .info-item:hover{border-color:rgba(122,92,255,.35);box-shadow:var(--sh-1);transform:translateX(3px)}
  .info-item .dot{
    width:24px;height:24px;border-radius:8px;display:grid;place-items:center;
    background:rgba(41,224,214,.14);color:#189E97;margin-top:3px;
  }
  .info-item .dot svg{width:16px;height:16px;stroke:currentColor;stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round}
  .info-item h4{font-size:16px;font-weight:700;margin-bottom:4px}
  .info-item p{font-size:14.5px;color:var(--text-2)}
  .mini-note{
    background:linear-gradient(160deg,#fff,#F7F5FF);
    border:1px solid var(--line);border-left:3px solid var(--accent);
    border-radius:var(--r-md);padding:20px 22px;
  }
  .mini-note h4{font-size:16px;font-weight:700;margin-bottom:8px}
  .mini-note p{font-size:14.5px;color:var(--text-2)}
  @media (max-width:1023px){.split-list{grid-template-columns:1fr;gap:28px}}

  /* ---------- FAQ ---------- */
  .faq-wrap{max-width:880px;margin:0 auto}
  .faq-list{display:grid;gap:12px}
  .accordion-item{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
    overflow:hidden;transition:border-color var(--t),box-shadow var(--t);
  }
  .accordion-item:hover{border-color:rgba(122,92,255,.3)}
  .accordion-item.is-open{border-color:rgba(122,92,255,.42);box-shadow:var(--sh-1)}
  .accordion-head{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 22px;text-align:left;
    font-size:17px;font-weight:700;color:var(--text);
    transition:background var(--t),color var(--t);
  }
  .accordion-head:hover{background:#FAFAFF;color:var(--brand)}
  .accordion-item.is-open .accordion-head{color:var(--brand)}
  .acc-icon{position:relative;width:22px;height:22px;flex:none}
  .acc-icon::before,.acc-icon::after{content:"";position:absolute;background:currentColor;border-radius:2px;transition:transform 220ms ease-out,opacity 220ms ease-out}
  .acc-icon::before{left:3px;right:3px;top:50%;height:2px;transform:translateY(-50%)}
  .acc-icon::after{top:3px;bottom:3px;left:50%;width:2px;transform:translateX(-50%)}
  .accordion-item.is-open .acc-icon::after{transform:translateX(-50%) rotate(90deg);opacity:0}
  .accordion-item.is-open .acc-icon{transform:rotate(180deg);transition:transform 260ms ease-out}
  .accordion-body{max-height:0;overflow:hidden;transition:max-height 300ms ease-out}
  .accordion-body p{
    padding:0 22px 20px;
    font-size:15px;line-height:1.9;color:var(--text-2);
    border-left:3px solid var(--accent);
    margin-left:0;
  }

  /* ---------- CTA ---------- */
  .cta-panel{
    position:relative;overflow:hidden;
    background:var(--ink-900);
    border-radius:24px;
    padding:48px 32px;
    color:#fff;
    box-shadow:var(--sh-3);
  }
  .cta-panel::before{
    content:"";position:absolute;inset:0;
    background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
    background-size:100% 6px;opacity:.8;
  }
  .cta-panel::after{
    content:"";position:absolute;right:-90px;top:-90px;width:320px;height:320px;border-radius:50%;
    background:radial-gradient(circle,rgba(108,76,241,.5),transparent 68%);
  }
  .cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center}
  .cta-panel h2{font-size:clamp(22px,3vw,30px);font-weight:700;line-height:1.35}
  .cta-panel p{margin-top:14px;color:#C9C6DE;font-size:16px;max-width:560px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
  @media (max-width:1023px){
    .cta-inner{grid-template-columns:1fr}
    .cta-actions{justify-content:flex-start}
    .cta-panel{padding:36px 22px}
  }

  /* ---------- footer ---------- */
  .site-footer{background:var(--ink-900);color:#A8A5BD;padding:64px 0 28px;margin-top:96px}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
  .site-footer .logo-mark{background:rgba(255,255,255,.06);box-shadow:inset 0 0 0 1px rgba(200,255,77,.16)}
  .footer-desc{margin-top:16px;font-size:14.5px;line-height:1.85;max-width:300px;color:#8B89A0}
  .footer-social{display:flex;gap:10px;margin-top:20px}
  .footer-social a{
    width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
    background:rgba(255,255,255,.06);color:#C9C6DE;
    transition:background var(--t),color var(--t),transform var(--t);
  }
  .footer-social a:hover{background:rgba(200,255,77,.14);color:var(--accent);transform:translateY(-2px)}
  .footer-social svg{width:20px;height:20px}
  .footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px}
  .footer-links li{margin-bottom:10px}
  .footer-links a{
    font-size:14.5px;color:#A8A5BD;display:inline-block;
    transition:color var(--t),transform var(--t);
  }
  .footer-links a:hover{color:var(--accent);transform:translateX(2px)}
  .footer-note{margin-top:14px;font-size:13px;color:#7E7C94}
  .footer-bottom{
    margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);
    display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13.5px;color:#7E7C94;
  }
  .back-top{
    display:inline-flex;align-items:center;gap:8px;
    padding:8px 18px;border-radius:999px;
    border:1.5px solid rgba(200,255,77,.5);color:var(--accent);
    font-size:13.5px;font-weight:600;
    transition:background var(--t),transform var(--t);
  }
  .back-top:hover{background:rgba(200,255,77,.12);transform:translateY(-2px)}
  .back-top svg{width:16px;height:16px;stroke:currentColor;stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round}
  @media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
  @media (max-width:639px){
    .footer-grid{grid-template-columns:1fr;gap:28px}
    .site-footer{padding:48px 0 24px;margin-top:64px}
  }