/* roulang page: index */
:root{
  --brand:#1F1B2E;
  --accent:#E8552F;
  --accent-2:#F2B33D;
  --bg:#FAF8F5;
  --surface:#FFFFFF;
  --surface-2:#F1EDE7;
  --ink:#1B1A22;
  --ink-2:#5C5866;
  --line:#E3DED6;
  --dark:#16131F;
  --light:#F5F2EE;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --sh-1:0 2px 8px rgba(31,27,46,.06);
  --sh-2:0 14px 40px rgba(31,27,46,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.85;color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:"Noto Serif SC","Source Han Serif SC",serif;color:var(--brand);margin:0;line-height:1.34;font-weight:700}
h1{font-size:48px;letter-spacing:-.6px}
h2{font-size:34px}
h3{font-size:22px;font-weight:600}
p{margin:0}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
img{max-width:100%;display:block}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 顶部细条 ---------- */
.topbar{height:36px;background:var(--dark);color:rgba(245,242,238,.72);font-size:13px;display:flex;align-items:center}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;width:100%}
.topbar a:hover{color:var(--accent-2)}
.topbar-l{display:flex;gap:20px;align-items:center}
.topbar-r{display:flex;gap:18px;align-items:center}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(250,248,245,.94);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease);
}
.site-header.scrolled{box-shadow:var(--sh-1)}
.nav-inner{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  height:76px;transition:height .24s var(--ease);position:relative;
}
.site-header.scrolled .nav-inner{height:60px}
.nav-side{display:flex;gap:26px;align-items:center}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end}
.nav-link{
  font-size:15px;font-weight:500;color:var(--ink);position:relative;padding:6px 0;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;background:var(--accent);
  transition:left .2s var(--ease),right .2s var(--ease);
}
.nav-link:hover::after,.nav-link.is-active::after{left:0;right:0}
.nav-link.is-active{color:var(--brand);font-weight:700}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand);color:#fff;border-radius:999px;
  padding:10px 22px;font-size:14px;font-weight:500;
  border:1px solid var(--brand);transition:all .22s var(--ease);
}
.nav-cta:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.logo{display:inline-flex;align-items:center;gap:9px;justify-self:center}
.logo-mark{color:var(--accent);display:inline-flex}
.logo-text{font-family:"Noto Serif SC",serif;font-size:20px;font-weight:700;color:var(--brand);letter-spacing:.4px}
.burger{
  position:absolute;right:0;top:50%;transform:translateY(-50%);
  display:none;width:42px;height:42px;border:1px solid var(--line);background:var(--surface);
  border-radius:var(--r-sm);cursor:pointer;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.burger span{display:block;width:18px;height:2px;background:var(--brand);transition:all .22s var(--ease)}
.drawer{
  position:fixed;left:0;right:0;top:0;z-index:200;background:var(--surface);
  transform:translateY(-102%);transition:transform .26s var(--ease);
  box-shadow:var(--sh-2);padding:18px 0 26px;border-bottom:1px solid var(--line);
}
.drawer.open{transform:translateY(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:0 18px 14px;border-bottom:1px solid var(--line)}
.drawer-close{width:38px;height:38px;border:1px solid var(--line);background:transparent;border-radius:var(--r-sm);font-size:18px;color:var(--brand);cursor:pointer}
.drawer nav{display:flex;flex-direction:column;padding:8px 18px 0}
.drawer nav a{padding:14px 0;border-bottom:1px solid var(--line);font-size:16px;font-weight:500}
.drawer nav a.is-active{color:var(--accent)}
.drawer-cta{margin:18px 18px 0;display:block;text-align:center;background:var(--brand);color:#fff;border-radius:999px;padding:14px;font-size:15px}
.drawer-mask{position:fixed;inset:0;background:rgba(22,19,31,.45);z-index:150;opacity:0;visibility:hidden;transition:opacity .26s var(--ease),visibility .26s}
.drawer-mask.open{opacity:1;visibility:visible}

/* ---------- 按钮族 ---------- */
.btn-main{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--brand);color:#fff;border:1px solid var(--brand);
  border-radius:999px;padding:14px 32px;font-size:15px;font-weight:500;
  transition:all .22s var(--ease);cursor:pointer;
}
.btn-main:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-main .arw{transition:transform .22s var(--ease)}
.btn-main:hover .arw{transform:translateX(4px)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:10px;
  background:transparent;color:var(--ink);border:1px solid var(--ink);
  border-radius:999px;padding:14px 32px;font-size:15px;font-weight:500;
  transition:all .22s var(--ease);cursor:pointer;
}
.btn-ghost:hover{background:var(--surface-2)}
.btn-text{color:var(--accent);font-size:14px;font-weight:500;display:inline-flex;align-items:center;gap:6px}
.btn-text:hover{color:var(--brand)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:76px 0 92px;background:var(--bg)}
.hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.11;filter:saturate(.5) contrast(.95);
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(250,248,245,.35) 0%,rgba(250,248,245,.95) 78%,var(--bg) 100%);
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--accent-2);color:var(--brand);
  border-radius:999px;padding:5px 14px;font-size:13px;font-weight:600;margin-bottom:20px;
}
.hero-badge i{font-size:11px}
.hero-title{font-size:52px;line-height:1.24;letter-spacing:-1px;margin-bottom:18px}
.hero-title em{font-style:normal;color:var(--accent);position:relative}
.hero-title em::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:6px;background:rgba(242,179,61,.48);z-index:-1}
.hero-sub{font-size:19px;color:var(--brand);font-weight:500;margin-bottom:14px}
.hero-lead{color:var(--ink-2);font-size:16px;max-width:560px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:22px}
.hero-meta{font-size:13px;color:var(--ink-2);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.hero-visual{position:relative}
.hero-visual::before{
  content:"";position:absolute;inset:8% 4% 8% 4%;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border-radius:var(--r-lg);opacity:.9;
}
.phone-shot{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-2);border:1px solid var(--line);background:var(--surface);
  max-width:440px;margin-left:auto;
  animation:floaty 3s ease-in-out infinite;
}
.phone-shot img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.float-stat{
  position:absolute;left:-6px;bottom:-22px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-2);
  padding:16px 20px;display:flex;gap:22px;
}
.float-stat div{text-align:left}
.float-stat b{display:block;font-family:"Noto Sans SC",sans-serif;font-weight:800;font-size:26px;color:var(--brand);line-height:1.1;font-variant-numeric:tabular-nums}
.float-stat span{font-size:12px;color:var(--ink-2)}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-alt{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:48px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--accent);margin-bottom:14px}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--accent)}
.section-title{font-size:34px;margin-bottom:14px}
.section-desc{color:var(--ink-2);font-size:16px;max-width:660px}

/* ---------- 功能截图轮播 ---------- */
.showcase{position:relative}
.show-item{margin:0;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);background:var(--surface);box-shadow:var(--sh-2)}
.show-item img{width:100%;aspect-ratio:16/9;object-fit:cover}
.show-item figcaption{font-size:14px;color:var(--ink-2);padding:16px 22px;border-top:1px solid var(--line);background:var(--surface)}
.showcase .carousel-indicators{position:static;margin:26px 0 0;display:flex;gap:10px;justify-content:center}
.showcase .carousel-indicators [data-bs-target]{
  width:52px;height:4px;background:var(--line);border:0;border-radius:3px;opacity:1;
  text-indent:0;margin:0;padding:0;transition:background .22s var(--ease);
}
.showcase .carousel-indicators .active{background:var(--accent)}
.showcase .carousel-control-prev,.showcase .carousel-control-next{width:52px;height:52px;top:50%;transform:translateY(-50%);background:var(--surface);border:1px solid var(--line);border-radius:50%;opacity:1;box-shadow:var(--sh-1)}
.showcase .carousel-control-prev{left:-26px}
.showcase .carousel-control-next{right:-26px}
.showcase .carousel-control-prev i,.showcase .carousel-control-next i{color:var(--brand);font-size:16px}

/* ---------- 功能要点 ---------- */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:44px 0;border-top:1px solid var(--line)}
.feature-row:first-child{border-top:0;padding-top:0}
.feature-row.rev .feature-media{order:-1}
.feature-no{font-family:"Noto Sans SC",sans-serif;font-weight:800;font-size:15px;color:var(--accent);font-variant-numeric:tabular-nums;letter-spacing:.14em;display:block;margin-bottom:12px}
.feature-text h3{margin-bottom:14px}
.feature-text p{color:var(--ink-2);margin-bottom:16px;max-width:560px}
.feature-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--ink);padding:6px 0}
.feature-list li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent-2);margin-top:11px;flex:none}
.feature-media img{width:100%;border-radius:var(--r-lg);box-shadow:var(--sh-2);border:1px solid var(--line);aspect-ratio:16/10;object-fit:cover}

/* ---------- 系统要求 ---------- */
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.spec-col{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:32px;box-shadow:var(--sh-1);transition:box-shadow .24s var(--ease),transform .24s var(--ease)}
.spec-col:hover{box-shadow:var(--sh-2);transform:translateY(-4px)}
.spec-col.is-top{border-color:var(--accent-2)}
.spec-col h3{margin-bottom:6px}
.spec-tag{font-size:13px;color:var(--ink-2);display:block;margin-bottom:20px}
.spec-list li{display:flex;justify-content:space-between;gap:18px;padding:15px 0;border-bottom:1px solid var(--line);font-size:15px}
.spec-list li:last-child{border-bottom:0}
.spec-list span{color:var(--ink-2)}
.spec-list strong{color:var(--brand);font-weight:600;text-align:right;font-variant-numeric:tabular-nums}

/* ---------- 评价墙 ---------- */
.review-wall{column-count:3;column-gap:24px}
.review-card{
  break-inside:avoid;margin-bottom:24px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);padding:24px;
  box-shadow:var(--sh-1);transition:box-shadow .24s var(--ease),transform .24s var(--ease);
}
.review-card:hover{box-shadow:var(--sh-2);transform:translateY(-4px)}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{
  width:42px;height:42px;border-radius:50%;flex:none;
  background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;
  font-family:"Noto Serif SC",serif;font-size:17px;font-weight:700;
}
.review-name{font-size:15px;font-weight:600;color:var(--brand)}
.review-id{font-size:12px;color:var(--ink-2)}
.stars{color:var(--accent-2);font-size:13px;margin-bottom:10px;letter-spacing:2px}
.review-card p{font-size:15px;color:var(--ink-2)}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:box-shadow .24s var(--ease),transform .24s var(--ease);
}
.news-card:hover{box-shadow:var(--sh-2);transform:translateY(-4px)}
.news-cover{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--surface-2)}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.news-card:hover .news-cover img{transform:scale(1.04)}
.news-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.badge-cat{
  align-self:flex-start;background:var(--surface-2);color:var(--ink-2);
  border-radius:999px;padding:3px 12px;font-size:13px;line-height:1.6;
}
.badge-new{background:var(--accent-2);color:var(--brand);font-weight:600}
.news-title{font-size:19px;line-height:1.5}
.news-title a{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-title a:hover{color:var(--accent)}
.news-excerpt{font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;font-size:13px;color:var(--ink-2);display:flex;gap:14px;font-variant-numeric:tabular-nums;border-top:1px solid var(--line);padding-top:14px}
.empty-state{
  grid-column:1/-1;text-align:center;background:var(--surface);border:1px dashed var(--line);
  border-radius:var(--r-lg);padding:56px 24px;
}
.empty-state i{font-size:30px;color:var(--accent-2);display:block;margin-bottom:14px}
.empty-state p{color:var(--ink-2);margin-bottom:18px}

/* ---------- 下载带 ---------- */
.download-band{background:var(--dark);color:var(--light);padding:92px 0;position:relative;overflow:hidden}
.download-band::before{
  content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;opacity:.14;
}
.band-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.5fr 1fr;gap:56px;align-items:center}
.band-copy h2{color:var(--light);font-size:34px;margin-bottom:14px}
.band-copy > p{color:rgba(245,242,238,.72);max-width:560px;margin-bottom:30px}
.platform-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;max-width:640px}
.platform-btn{
  display:flex;align-items:center;gap:14px;padding:16px 20px;
  background:rgba(245,242,238,.06);border:1px solid rgba(245,242,238,.16);
  border-radius:var(--r-md);transition:all .22s var(--ease);
}
.platform-btn:hover{background:rgba(232,85,47,.16);border-color:var(--accent);transform:translateY(-3px)}
.pf-ico{width:34px;height:34px;border-radius:var(--r-sm);background:rgba(245,242,238,.1);display:flex;align-items:center;justify-content:center;color:var(--accent-2);font-size:15px;flex:none}
.pf-name{display:block;font-size:15px;font-weight:600;color:var(--light)}
.pf-ver{display:block;font-size:12px;color:rgba(245,242,238,.6);font-variant-numeric:tabular-nums}
.band-side{border-left:1px solid rgba(245,242,238,.15);padding-left:44px}
.band-side-title{font-size:14px;font-weight:600;color:var(--light);letter-spacing:.06em;margin-bottom:12px}
.band-side p{color:rgba(245,242,238,.7);font-size:14px;margin-bottom:12px}
.band-note{font-size:13px;color:rgba(245,242,238,.55);border-top:1px solid rgba(245,242,238,.15);padding-top:14px;margin-top:20px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);margin-bottom:14px;overflow:hidden;box-shadow:var(--sh-1)}
.faq-item .accordion-button{
  font-family:"Noto Serif SC",serif;font-size:17px;font-weight:600;color:var(--brand);
  background:var(--surface);padding:22px 56px 22px 26px;box-shadow:none;position:relative;
}
.faq-item .accordion-button:not(.collapsed){color:var(--accent);background:var(--surface)}
.faq-item .accordion-button:focus{box-shadow:none;border-color:transparent}
.faq-item .accordion-button::after{
  background-image:none;content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;
  font-size:13px;color:var(--ink-2);width:auto;height:auto;transition:transform .22s var(--ease);
}
.faq-item .accordion-button:not(.collapsed)::after{transform:rotate(180deg);color:var(--accent)}
.faq-item .accordion-button::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;background:var(--accent);
  transform:scaleY(0);transform-origin:center;transition:transform .24s var(--ease);
}
.faq-item .accordion-button:not(.collapsed)::before{transform:scaleY(1)}
.faq-item .accordion-body{padding:0 26px 24px;color:var(--ink-2);font-size:15px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:var(--light);padding:72px 0 0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1.2fr 1fr;gap:40px;padding-bottom:52px;border-bottom:1px solid rgba(245,242,238,.14)}
.foot-logo{font-family:"Noto Serif SC",serif;font-size:22px;font-weight:700;color:var(--light);margin-bottom:14px}
.foot-brand p{color:rgba(245,242,238,.62);font-size:14px;max-width:320px}
.foot-col h4{font-family:"Noto Sans SC",sans-serif;font-size:14px;font-weight:600;color:var(--light);letter-spacing:.05em;margin-bottom:18px}
.foot-col a,.foot-col p{display:block;font-size:13px;color:rgba(245,242,238,.7);margin-bottom:11px}
.foot-col a:hover{color:var(--accent-2)}
.foot-bottom{text-align:center;font-size:13px;color:rgba(245,242,238,.5);padding:24px 0;font-variant-numeric:tabular-nums}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .nav-side{gap:18px}
  .nav-link{font-size:14px}
  .hero-title{font-size:44px}
}
@media (max-width:991px){
  h1{font-size:38px}
  .hero-title{font-size:38px}
  .section-title,.band-copy h2{font-size:28px}
  .nav-left,.nav-right{display:none}
  .burger{display:flex}
  .nav-inner{grid-template-columns:auto 1fr auto;height:64px}
  .logo{justify-self:start}
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-visual{order:-1}
  .phone-shot{margin:0 auto;max-width:400px}
  .float-stat{left:50%;transform:translateX(-50%);bottom:-26px}
  .feature-row{grid-template-columns:1fr;gap:28px;padding:36px 0}
  .feature-row.rev .feature-media{order:0}
  .spec-grid{grid-template-columns:1fr}
  .review-wall{column-count:2}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .band-inner{grid-template-columns:1fr;gap:36px}
  .band-side{border-left:0;padding-left:0;border-top:1px solid rgba(245,242,238,.15);padding-top:28px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .showcase .carousel-control-prev{left:8px}
  .showcase .carousel-control-next{right:8px}
}
@media (max-width:767px){
  .wrap{padding:0 18px}
  h1{font-size:30px}
  .hero{padding:48px 0 64px}
  .hero-title{font-size:30px;letter-spacing:-.4px}
  .hero-sub{font-size:17px}
  .hero-lead{font-size:15px;margin-bottom:24px}
  .hero-actions{gap:10px}
  .btn-main,.btn-ghost{padding:12px 24px;font-size:14px;flex:1 1 auto;justify-content:center}
  .float-stat{gap:16px;padding:12px 16px}
  .float-stat b{font-size:20px}
  .section{padding:56px 0}
  .section-title,.band-copy h2{font-size:24px}
  .section-head{margin-bottom:32px}
  .news-grid{grid-template-columns:1fr}
  .review-wall{column-count:1}
  .platform-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .topbar-l span:last-child{display:none}
  .download-band{padding:56px 0}
  .feature-row h3{font-size:19px}
  .spec-col{padding:24px}
  .spec-list li{flex-direction:column;gap:2px;align-items:flex-start}
  .spec-list strong{text-align:left}
}

/* roulang page: article */
:root{
  --brand:#1F1B2E;
  --brand-soft:#2B2740;
  --accent:#E8552F;
  --accent-2:#F2B33D;
  --bg:#FAF8F5;
  --surface:#FFFFFF;
  --surface-2:#F1EDE7;
  --ink:#1B1A22;
  --ink-2:#5C5866;
  --line:#E3DED6;
  --dark:#16131F;
  --on-dark:#F5F2EE;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --sh-1:0 2px 8px rgba(31,27,46,.06);
  --sh-2:0 14px 40px rgba(31,27,46,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--accent);}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit;}
h1,h2,h3,h4{font-family:"Noto Serif SC","Source Han Serif SC",serif;color:var(--brand);margin:0;line-height:1.35;letter-spacing:.01em;}
p{margin:0 0 1.2em;}
ul,ol{margin:0 0 1.2em;padding-left:1.3em;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:900;
  background:rgba(250,248,245,.94);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid transparent;
  transition:height .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-1);border-bottom-color:var(--line);}
.nav-inner{
  position:relative;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  height:76px;
  transition:height .22s var(--ease);
}
.site-header.is-scrolled .nav-inner{height:60px;}
.nav-side{display:flex;align-items:center;gap:26px;min-width:0;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}
.nav-link{
  position:relative;
  font-size:15px;font-weight:500;color:var(--ink);
  padding:6px 0;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;
  background:var(--accent);transition:left .2s var(--ease),right .2s var(--ease);
}
.nav-link:hover::after,.nav-link.is-active::after{left:0;right:0;}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--brand);}
.logo-mark{display:inline-flex;color:var(--brand);transition:color .2s var(--ease),transform .22s var(--ease);}
.logo:hover .logo-mark{color:var(--accent);transform:rotate(-8deg);}
.logo-text{font-family:"Noto Serif SC",serif;font-size:20px;font-weight:700;letter-spacing:.02em;}
.nav-cta{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--brand);color:#fff;border-radius:999px;
  padding:10px 22px;font-size:14px;font-weight:600;white-space:nowrap;
  transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-cta:hover{background:var(--accent);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-1);}
.burger{
  display:none;width:42px;height:42px;flex-direction:column;justify-content:center;align-items:center;gap:5px;
  border-radius:var(--r-sm);border:1px solid var(--line);background:var(--surface);
}
.burger span{display:block;width:18px;height:2px;background:var(--brand);transition:transform .22s var(--ease),opacity .18s var(--ease);}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(22,19,31,.55);z-index:940;
  opacity:0;pointer-events:none;transition:opacity .22s var(--ease);
}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;left:0;right:0;top:0;z-index:950;
  background:var(--surface);border-bottom:1px solid var(--line);
  box-shadow:var(--sh-2);
  padding:22px 18px 26px;
  transform:translateY(-102%);
  transition:transform .26s var(--ease);
}
.drawer.is-open{transform:translateY(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.drawer-title{font-family:"Noto Serif SC",serif;font-weight:700;font-size:18px;color:var(--brand);}
.drawer-close{width:38px;height:38px;border-radius:var(--r-sm);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--ink-2);}
.drawer-close:hover{color:var(--accent);border-color:var(--accent);}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-nav a{
  padding:14px 2px;font-size:16px;font-weight:500;border-bottom:1px solid var(--line);
}
.drawer-nav a:last-child{border-bottom:0;}
.drawer-cta{margin-top:16px;display:block;text-align:center;background:var(--brand);color:#fff;border-radius:999px;padding:14px 20px;font-weight:600;}
.drawer-cta:hover{background:var(--accent);color:#fff;}

/* ---------- 文章头部 ---------- */
.article-head{
  position:relative;
  border-bottom:1px solid var(--line);
  background-image:url("/assets/images/backpic/back-3.png");
  background-size:cover;
  background-position:center;
}
.article-head::before{content:"";position:absolute;inset:0;background:rgba(250,248,245,.94);}
.article-head .wrap{position:relative;z-index:1;padding-top:26px;padding-bottom:44px;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);margin-bottom:22px;}
.crumb a:hover{color:var(--accent);}
.crumb .sep{color:#B9B3AA;}
.crumb .cur{color:var(--ink-2);max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:4px 12px;border-radius:999px;
  font-size:13px;line-height:1;background:var(--surface-2);color:var(--ink-2);
}
.badge.is-warm{background:var(--accent-2);color:var(--ink);font-weight:600;}
.article-title{
  font-size:44px;line-height:1.28;font-weight:700;margin:14px 0 18px;max-width:20em;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;font-size:13px;color:var(--ink-2);}
.article-meta span{display:inline-flex;align-items:center;gap:6px;}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C6C0B6;display:inline-block;}

/* ---------- 正文 ---------- */
.article-main{padding:64px 0 24px;}
.article-shell{max-width:900px;margin:0 auto;padding:0 24px;}
.article-body{
  max-width:760px;
  margin:0 auto;
  font-size:16.5px;
  line-height:1.95;
  color:#26242E;
}
.article-body>*:first-child{margin-top:0;}
.article-body h2{
  font-size:28px;font-weight:700;margin:48px 0 18px;color:var(--brand);
}
.article-body h2::before{content:"";display:block;width:48px;height:2px;background:var(--accent);margin-bottom:14px;}
.article-body h3{font-size:21px;font-weight:600;margin:34px 0 12px;color:var(--brand);}
.article-body h4{font-size:18px;font-weight:600;margin:26px 0 10px;color:var(--brand);}
.article-body p{margin:0 0 1.3em;}
.article-body a{color:var(--accent);border-bottom:1px solid rgba(232,85,47,.35);}
.article-body a:hover{border-bottom-color:var(--accent);}
.article-body ul,.article-body ol{padding-left:1.35em;margin:0 0 1.4em;}
.article-body li{margin-bottom:.5em;}
.article-body blockquote{
  margin:24px 0;padding:16px 22px;background:var(--surface-2);
  border-left:4px solid var(--line);border-radius:0 var(--r-md) var(--r-md) 0;color:var(--ink-2);
}
.article-body img{border-radius:var(--r-md);box-shadow:var(--sh-1);margin:22px 0;height:auto;}
.article-body figure{margin:26px 0;}
.article-body figcaption{text-align:center;font-size:13px;color:var(--ink-2);margin-top:10px;}
.article-body code{
  background:var(--surface-2);border:1px solid var(--line);border-radius:6px;
  padding:2px 6px;font-size:14px;color:#B3401F;
}
.article-body pre{
  background:var(--dark);color:var(--on-dark);border-radius:var(--r-md);
  padding:18px 20px;overflow-x:auto;font-size:14px;line-height:1.7;
}
.article-body pre code{background:none;border:0;color:inherit;padding:0;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:38px 0;}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:12px 10px;text-align:left;}
.article-body th{background:var(--surface-2);font-weight:600;color:var(--brand);}

/* 空态 */
.empty-state{
  border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);
  padding:48px 32px;text-align:center;box-shadow:var(--sh-1);
}
.empty-state .empty-icon{
  width:56px;height:56px;margin:0 auto 18px;border-radius:50%;
  border:2px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--ink-2);
}
.empty-state h2{font-size:22px;margin-bottom:10px;}
.empty-state p{color:var(--ink-2);font-size:15px;margin-bottom:22px;}

/* ---------- 文末 ---------- */
.article-foot{max-width:760px;margin:44px auto 0;padding-top:26px;border-top:1px solid var(--line);}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:22px;}
.tag-row .lbl{font-size:13px;color:var(--ink-2);}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:999px;
  border:1px solid var(--line);background:var(--surface);font-size:13px;color:var(--ink-2);
  transition:border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.tag:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px);}
.share-row{display:flex;align-items:center;gap:12px;}
.share-row .lbl{font-size:13px;color:var(--ink-2);}
.icon-btn{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--surface);
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink-2);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.icon-btn:hover{background:var(--accent);border-color:var(--accent);color:#fff;transform:translateY(-3px);}

/* ---------- 通用区块 ---------- */
.section{padding:82px 0;}
.section-head{margin-bottom:38px;max-width:44em;}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.12em;
  color:var(--accent);font-weight:600;margin-bottom:12px;text-transform:uppercase;
}
.section-eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);display:block;}
.section-head h2{font-size:32px;font-weight:700;margin-bottom:12px;}
.section-head p{color:var(--ink-2);font-size:15.5px;margin:0;}

.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);}
.card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#D6CFC4;}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease);}
.card:hover .card-media img{transform:scale(1.04);}
.card-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.card-body h3{font-size:19px;font-weight:600;line-height:1.5;}
.card-body p{color:var(--ink-2);font-size:14.5px;margin:0;line-height:1.75;}
.card-meta{display:flex;align-items:center;gap:12px;margin-top:auto;font-size:13px;color:var(--ink-2);}
.card-link{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;}
.card-link .arrow{transition:transform .2s var(--ease);}
.card:hover .card-link{color:var(--accent);}
.card:hover .card-link .arrow{transform:translateX(4px);}

/* ---------- CTA 带 ---------- */
.cta-band{background:var(--dark);color:var(--on-dark);padding:64px 0;}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;}
.cta-inner h2{color:#fff;font-size:30px;margin-bottom:10px;}
.cta-inner p{color:rgba(245,242,238,.72);font-size:15px;margin:0;max-width:52ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
.btn-main{
  display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;
  border-radius:999px;padding:14px 32px;font-size:15px;font-weight:600;
  transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-main:hover{background:#D1471F;color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(232,85,47,.32);}
.btn-main .arrow{transition:transform .2s var(--ease);}
.btn-main:hover .arrow{transform:translateX(4px);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;background:transparent;color:var(--ink);
  border:1px solid var(--ink);border-radius:999px;padding:14px 30px;font-size:15px;font-weight:600;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.btn-ghost:hover{background:var(--surface-2);color:var(--ink);transform:translateY(-2px);}
.btn-ghost.on-dark{color:var(--on-dark);border-color:rgba(245,242,238,.5);}
.btn-ghost.on-dark:hover{background:rgba(245,242,238,.12);color:#fff;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:var(--on-dark);padding:66px 0 26px;margin-top:0;}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px;}
.foot-logo{font-family:"Noto Serif SC",serif;font-size:22px;font-weight:700;color:#fff;margin-bottom:14px;}
.foot-brand p{color:rgba(245,242,238,.68);font-size:13.5px;line-height:1.9;margin:0;max-width:32em;}
.foot-col h4{font-size:14px;font-weight:600;color:#F5F2EE;margin-bottom:16px;}
.foot-col a,.foot-col p{display:block;font-size:13px;color:rgba(245,242,238,.7);margin:0 0 10px;line-height:1.7;}
.foot-col a:hover{color:var(--accent-2);}
.foot-bottom{
  border-top:1px solid rgba(245,242,238,.14);padding-top:20px;text-align:center;
  font-size:13px;color:rgba(245,242,238,.6);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .nav-side{gap:18px;}
  .nav-link{font-size:14px;}
  .article-title{font-size:38px;}
}
@media (max-width:991px){
  .nav-side{display:none;}
  .burger{display:flex;position:absolute;right:18px;top:50%;transform:translateY(-50%);z-index:2;}
  .nav-inner{grid-template-columns:1fr auto 1fr;height:64px;}
  .site-header.is-scrolled .nav-inner{height:58px;}
  .wrap{padding:0 20px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .section{padding:64px 0;}
  .section-head h2{font-size:27px;}
  .article-title{font-size:32px;}
  .article-main{padding:48px 0 18px;}
  .article-body{font-size:16px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .wrap{padding:0 18px;}
  .article-head .wrap{padding-top:20px;padding-bottom:34px;}
  .article-title{font-size:27px;margin:12px 0 16px;}
  .crumb{font-size:12.5px;margin-bottom:16px;}
  .crumb .cur{white-space:normal;max-width:100%;}
  .article-main{padding:36px 0 12px;}
  .article-body h2{font-size:23px;margin:36px 0 14px;}
  .article-body h3{font-size:19px;}
  .article-body{font-size:15.8px;line-height:1.9;}
  .card-grid{grid-template-columns:1fr;}
  .section{padding:52px 0;}
  .section-head{margin-bottom:26px;}
  .section-head h2{font-size:23px;}
  .cta-band{padding:50px 0;}
  .cta-inner h2{font-size:23px;}
  .cta-actions{width:100%;}
  .btn-main,.btn-ghost{width:100%;justify-content:center;}
  .foot-grid{grid-template-columns:1fr;gap:26px;padding-bottom:30px;}
  .article-meta{gap:8px 14px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
}
@media (max-width:400px){
  .article-title{font-size:24px;}
  .logo-text{font-size:18px;}
}

/* roulang page: category1 */
:root{
  --brand:#1F1B2E;
  --accent:#E8552F;
  --accent-2:#F2B33D;
  --bg:#FAF8F5;
  --surface:#FFFFFF;
  --surface-2:#F1EDE7;
  --ink:#1B1A22;
  --ink-2:#5C5866;
  --line:#E3DED6;
  --dark:#16131F;
  --on-dark:#F5F2EE;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --sh-1:0 2px 8px rgba(31,27,46,.06);
  --sh-2:0 14px 40px rgba(31,27,46,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Noto Serif SC","Source Han Serif SC",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4{font-family:var(--serif);margin:0;color:var(--brand);letter-spacing:.01em;}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
.num{font-family:"Inter",var(--sans);font-variant-numeric:tabular-nums;}
::selection{background:var(--accent);color:#fff;}

.wrap{max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section-sm{padding:64px 0;}
.section-alt{background:var(--surface-2);}

/* ---------- 顶部工具栏 ---------- */
.topbar{background:var(--dark);color:rgba(245,242,238,.72);font-size:13px;height:36px;display:flex;align-items:center;}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;width:100%;}
.topbar-info{display:flex;gap:18px;align-items:center;}
.topbar-info i{color:var(--accent-2);margin-right:6px;}
.topbar-login{display:inline-flex;align-items:center;gap:6px;color:var(--on-dark);transition:color .2s var(--ease);}
.topbar-login:hover{color:var(--accent-2);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(250,248,245,.94);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:box-shadow .24s var(--ease),border-color .24s var(--ease),background .24s var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:var(--sh-1);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:76px;transition:height .24s var(--ease);}
.site-header.is-stuck .nav-inner{height:60px;}
.nav-side{display:flex;align-items:center;gap:26px;flex:1;min-width:0;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;gap:22px;}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--ink);
  padding:6px 0;white-space:nowrap;transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;
  background:var(--accent);transition:left .2s var(--ease),right .2s var(--ease);
}
.nav-link:hover{color:var(--brand);}
.nav-link:hover::after{left:0;right:0;}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{left:0;right:0;}
.logo{display:inline-flex;align-items:center;gap:9px;flex:0 0 auto;padding:0 22px;}
.logo-mark{display:inline-flex;align-items:center;color:var(--accent);transition:transform .24s var(--ease);}
.logo:hover .logo-mark{transform:rotate(-8deg);}
.logo-text{font-family:var(--serif);font-size:20px;font-weight:700;color:var(--brand);letter-spacing:.02em;}
.nav-cta{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--brand);color:#fff;border-radius:999px;
  padding:9px 20px;font-size:14px;font-weight:600;
  transition:background .22s var(--ease),transform .22s var(--ease);
}
.nav-cta:hover{background:var(--accent);color:#fff;transform:translateY(-1px);}
.burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:var(--surface);
  border-radius:var(--r-sm);position:relative;cursor:pointer;
}
.burger span{
  position:absolute;left:12px;right:12px;height:2px;background:var(--brand);border-radius:2px;
  transition:transform .24s var(--ease),opacity .18s var(--ease);
}
.burger span:nth-child(1){top:15px;}
.burger span:nth-child(2){top:21px;}
.burger span:nth-child(3){top:27px;}
.burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ---------- 移动端抽屉 ---------- */
.drawer{
  position:fixed;top:0;left:0;right:0;z-index:1200;
  background:var(--dark);color:var(--on-dark);
  transform:translateY(-100%);transition:transform .26s var(--ease);
  padding:18px 0 26px;box-shadow:var(--sh-2);
}
.drawer.open{transform:translateY(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:0 24px 14px;border-bottom:1px solid rgba(245,242,238,.14);}
.drawer-head .logo-text{color:var(--on-dark);}
.drawer-close{
  width:40px;height:40px;border-radius:50%;border:1px solid rgba(245,242,238,.24);
  background:transparent;color:var(--on-dark);font-size:20px;line-height:1;cursor:pointer;
}
.drawer-close:hover{border-color:var(--accent-2);color:var(--accent-2);}
.drawer-nav{display:flex;flex-direction:column;padding:14px 24px 0;gap:2px;}
.drawer-nav a{
  padding:13px 0;font-size:15px;color:rgba(245,242,238,.82);
  border-bottom:1px solid rgba(245,242,238,.08);transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.drawer-nav a:hover{color:var(--accent-2);padding-left:6px;}
.drawer-nav a.is-active{color:#fff;font-weight:600;}
.drawer-nav .drawer-cta{
  margin-top:14px;border:0;text-align:center;border-radius:999px;
  background:var(--accent);color:#fff;font-weight:600;
}
.drawer-mask{
  position:fixed;inset:0;z-index:1100;background:rgba(22,19,31,.55);
  opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s var(--ease);
}
.drawer-mask.show{opacity:1;visibility:visible;}

/* ---------- 按钮 ---------- */
.btn-main{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--brand);color:#fff;border:1px solid var(--brand);
  border-radius:999px;padding:14px 32px;font-size:15px;font-weight:600;
  transition:background .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-main .arw{transition:transform .22s var(--ease);}
.btn-main:hover{background:var(--accent);border-color:var(--accent);color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(232,85,47,.28);}
.btn-main:hover .arw{transform:translateX(4px);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:10px;
  background:transparent;color:var(--ink);border:1px solid var(--ink);
  border-radius:999px;padding:13px 30px;font-size:15px;font-weight:600;
  transition:background .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn-ghost:hover{background:var(--surface-2);color:var(--brand);transform:translateY(-2px);}
.btn-main:focus-visible,.btn-ghost:focus-visible,.nav-link:focus-visible,.nav-cta:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;
}

/* ---------- 徽章 / 标签 ---------- */
.badge-pill{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 12px;
  border-radius:999px;font-size:13px;font-weight:500;
  background:var(--surface-2);color:var(--ink-2);
}
.badge-hot{background:var(--accent-2);color:var(--ink);font-weight:600;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  letter-spacing:.14em;color:var(--accent);text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--accent);display:inline-block;}

/* ---------- 页面头部 ---------- */
.page-hero{
  position:relative;color:#fff;padding:120px 0 64px;min-height:440px;
  display:flex;align-items:flex-end;
  background:linear-gradient(180deg,rgba(22,19,31,.58) 0%,rgba(22,19,31,.86) 100%),
             url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.page-hero h1{
  color:#fff;font-size:48px;line-height:1.25;font-weight:700;margin:0 0 18px;max-width:900px;
}
.page-hero .hero-sub{
  font-size:17px;line-height:1.9;color:rgba(245,242,238,.84);max-width:680px;margin:0 0 26px;
}
.crumb{font-size:13px;color:rgba(245,242,238,.62);display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.crumb a{color:rgba(245,242,238,.82);transition:color .2s var(--ease);}
.crumb a:hover{color:var(--accent-2);}
.crumb .sep{color:rgba(245,242,238,.4);}

/* ---------- 导语区 ---------- */
.split{display:grid;grid-template-columns:1.85fr 1fr;gap:48px;align-items:start;}
.lead-text p{color:var(--ink-2);font-size:16px;}
.lead-text h2{font-size:34px;line-height:1.35;margin-bottom:22px;}
.check-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:28px;box-shadow:var(--sh-1);
}
.check-card h3{font-size:18px;font-weight:600;margin-bottom:6px;}
.check-card .card-note{font-size:13px;color:var(--ink-2);margin-bottom:18px;}
.check-list li{
  position:relative;padding:11px 0 11px 22px;font-size:14.5px;color:var(--ink-2);line-height:1.75;
  border-bottom:1px dashed var(--line);
}
.check-list li:last-child{border-bottom:0;padding-bottom:0;}
.check-list li::before{
  content:"";position:absolute;left:0;top:19px;width:8px;height:8px;border-radius:50%;
  background:var(--accent-2);
}

/* ---------- 区块标题 ---------- */
.sec-head{max-width:760px;margin-bottom:52px;}
.sec-head h2{font-size:34px;line-height:1.4;margin-bottom:14px;}
.sec-head p{color:var(--ink-2);font-size:15.5px;}

/* ---------- 图文交替 ---------- */
.alt-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.alt-row + .alt-row{margin-top:96px;}
.alt-media{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2);border:1px solid var(--line);}
.alt-media img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform .32s var(--ease);}
.alt-row:hover .alt-media img{transform:scale(1.04);}
.alt-media .media-tag{
  position:absolute;left:16px;bottom:16px;background:rgba(22,19,31,.78);color:#fff;
  font-size:13px;padding:6px 14px;border-radius:999px;letter-spacing:.04em;
}
.alt-row.reverse .alt-media{order:2;}
.alt-body h2{font-size:28px;line-height:1.42;margin-bottom:16px;}
.alt-body p{color:var(--ink-2);font-size:15.5px;}
.step-mini{display:flex;flex-direction:column;gap:14px;margin-top:24px;}
.step-mini li{display:flex;gap:14px;align-items:flex-start;font-size:15px;color:var(--ink-2);}
.step-mini .idx{
  flex:0 0 auto;font-family:"Inter",var(--sans);font-weight:800;font-size:14px;
  color:var(--accent);line-height:1.5;min-width:26px;
}

/* ---------- 定义式双列列表 ---------- */
.def-list{display:grid;grid-template-columns:1fr 1fr;gap:0 40px;margin:0;}
.def-item{
  display:grid;grid-template-columns:120px 1fr;gap:18px;
  padding:20px 0;border-bottom:1px solid var(--line);
}
.def-item dt{
  font-size:14.5px;font-weight:600;color:var(--brand);line-height:1.7;
}
.def-item dd{margin:0;font-size:14.5px;color:var(--ink-2);line-height:1.8;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px;margin:0 auto;}
.j9-acc .accordion-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:14px;overflow:hidden;box-shadow:var(--sh-1);
}
.j9-acc .accordion-button{
  position:relative;width:100%;background:var(--surface);color:var(--ink);
  font-size:16px;font-weight:600;padding:20px 56px 20px 24px;box-shadow:none;
  border:0;border-radius:0;transition:color .2s var(--ease);
}
.j9-acc .accordion-button::before{
  content:"";position:absolute;left:0;top:50%;width:3px;height:60%;
  background:var(--accent);transform:translateY(-50%) scaleY(0);transform-origin:center;
  transition:transform .22s var(--ease);
}
.j9-acc .accordion-button:not(.collapsed){color:var(--brand);}
.j9-acc .accordion-button:not(.collapsed)::before{transform:translateY(-50%) scaleY(1);}
.j9-acc .accordion-button:focus{box-shadow:none;outline:2px solid var(--accent);outline-offset:-2px;}
.j9-acc .accordion-button::after{
  width:20px;height:20px;background-size:20px;background-position:center;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231F1B2E' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E");
}
.j9-acc .accordion-button:not(.collapsed)::after{
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23E8552F' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M5 12h14'/%3E%3C/svg%3E");
}
.j9-acc .accordion-body{padding:0 24px 22px;font-size:15px;color:var(--ink-2);line-height:1.85;}

/* ---------- CTA ---------- */
.cta-band{background:var(--dark);color:var(--on-dark);padding:76px 0;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;}
.cta-band h2{color:#fff;font-size:32px;line-height:1.4;margin-bottom:12px;}
.cta-band p{color:rgba(245,242,238,.74);font-size:15.5px;max-width:560px;margin:0;}
.cta-band .btn-main{background:var(--accent);border-color:var(--accent);}
.cta-band .btn-main:hover{background:#fff;border-color:#fff;color:var(--brand);box-shadow:0 12px 28px rgba(0,0,0,.32);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(245,242,238,.7);}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px;padding:72px 0 44px;}
.foot-logo{font-family:var(--serif);font-size:20px;font-weight:700;color:var(--on-dark);margin-bottom:14px;letter-spacing:.02em;}
.foot-brand p{font-size:13px;line-height:1.9;color:rgba(245,242,238,.7);max-width:320px;margin:0;}
.foot-col h4{font-size:14px;font-weight:600;color:var(--on-dark);margin:0 0 16px;font-family:var(--sans);}
.foot-col a{display:block;font-size:13px;color:rgba(245,242,238,.7);margin-bottom:10px;transition:color .2s var(--ease),transform .2s var(--ease);}
.foot-col a:hover{color:var(--accent-2);transform:translateX(3px);}
.foot-col p{font-size:13px;color:rgba(245,242,238,.7);margin:0 0 10px;line-height:1.85;}
.foot-bottom{
  border-top:1px solid rgba(245,242,238,.12);padding:22px 0 34px;text-align:center;
  font-size:13px;color:rgba(245,242,238,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .nav-side{gap:18px;}
  .logo{padding:0 12px;}
  .page-hero h1{font-size:42px;}
}
@media (max-width:991px){
  .nav-side{display:none;}
  .burger{display:block;}
  .nav-inner{height:64px;}
  .site-header.is-stuck .nav-inner{height:58px;}
  .logo{padding:0;}
  .section{padding:64px 0;}
  .section-sm{padding:52px 0;}
  .split{grid-template-columns:1fr;gap:32px;}
  .alt-row{grid-template-columns:1fr;gap:28px;}
  .alt-row.reverse .alt-media{order:0;}
  .alt-row + .alt-row{margin-top:64px;}
  .def-list{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;padding:56px 0 32px;}
  .page-hero{padding:92px 0 48px;min-height:0;}
  .page-hero h1{font-size:34px;}
  .sec-head h2{font-size:28px;}
  .lead-text h2{font-size:28px;}
  .alt-body h2{font-size:24px;}
}
@media (max-width:600px){
  .wrap{padding:0 18px;}
  .topbar{display:none;}
  body{font-size:15.5px;}
  .section{padding:56px 0;}
  .page-hero{padding:76px 0 40px;}
  .page-hero h1{font-size:29px;line-height:1.34;}
  .page-hero .hero-sub{font-size:15px;}
  .sec-head{margin-bottom:34px;}
  .sec-head h2{font-size:24px;}
  .lead-text h2{font-size:24px;}
  .alt-body h2{font-size:21px;}
  .alt-row + .alt-row{margin-top:52px;}
  .def-item{grid-template-columns:1fr;gap:6px;padding:16px 0;}
  .cta-band{padding:56px 0;}
  .cta-band h2{font-size:23px;}
  .cta-inner .btn-main{width:100%;justify-content:center;}
  .foot-grid{grid-template-columns:1fr;padding:48px 0 26px;}
  .j9-acc .accordion-button{font-size:15px;padding:17px 48px 17px 18px;}
  .j9-acc .accordion-body{padding:0 18px 18px;font-size:14.5px;}
  .check-card{padding:22px;}
}

/* roulang page: category2 */
:root{
  --brand:#1F1B2E;
  --accent:#E8552F;
  --accent-2:#F2B33D;
  --bg:#FAF8F5;
  --surface:#FFFFFF;
  --surface-2:#F1EDE7;
  --ink:#1B1A22;
  --ink-2:#5C5866;
  --line:#E3DED6;
  --dark:#16131F;
  --dark-ink:#F5F2EE;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --sh-1:0 2px 8px rgba(31,27,46,.06);
  --sh-2:0 14px 40px rgba(31,27,46,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-family:var(--serif);color:var(--ink);font-weight:700;letter-spacing:-.01em;}
p{margin:0 0 1.2em;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ---------- 容器 ---------- */
.wrap{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.wrap-narrow{max-width:760px;}

/* ---------- 顶部工具栏 ---------- */
.topbar{
  background:var(--dark);
  color:rgba(245,242,238,.72);
  font-size:13px;
  line-height:36px;
  height:36px;
  overflow:hidden;
}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.topbar a{color:rgba(245,242,238,.72);}
.topbar a:hover{color:var(--accent-2);}
.topbar-right{display:flex;align-items:center;gap:18px;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(250,248,245,.94);
  backdrop-filter:saturate(150%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.nav-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  height:76px;
  transition:height .24s var(--ease);
}
.site-header.is-scrolled .nav-inner{height:60px;}
.nav-side{display:flex;align-items:center;gap:26px;}
.nav-left{justify-self:start;}
.nav-right{justify-self:end;}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--ink-2);
  padding:6px 0;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:0;
  width:0;
  height:2px;
  background:var(--accent);
  transform:translateX(-50%);
  transition:width .2s var(--ease);
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--ink);font-weight:600;}
.nav-link.is-active::after{width:100%;}
.logo{
  display:inline-flex;
  align-items:center;
  gap:9px;
  justify-self:center;
  color:var(--brand);
}
.logo-mark{display:inline-flex;color:var(--accent);}
.logo-text{
  font-family:var(--sans);
  font-size:20px;
  font-weight:700;
  letter-spacing:.02em;
}
.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:var(--brand);
  color:#fff;
  font-size:14px;
  font-weight:600;
  padding:10px 22px;
  border-radius:999px;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.nav-cta:hover{background:var(--accent);color:#fff;transform:translateY(-2px);}
.burger{
  display:none;
  justify-self:end;
  width:42px;
  height:42px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:var(--surface);
  padding:0;
  cursor:pointer;
  position:relative;
}
.burger span{
  position:absolute;
  left:12px;
  width:18px;
  height:2px;
  background:var(--ink);
  border-radius:2px;
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.burger span:nth-child(1){top:14px;}
.burger span:nth-child(2){top:20px;}
.burger span:nth-child(3){top:26px;}
.burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-2);
  padding:18px 24px 26px;
  transform:translateY(-102%);
  transition:transform .26s var(--ease);
}
.drawer.is-open{transform:translateY(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.drawer-title{font-size:14px;font-weight:600;color:var(--ink-2);letter-spacing:.06em;}
.drawer-close{
  width:36px;height:36px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:var(--surface-2);font-size:18px;line-height:1;color:var(--ink);cursor:pointer;
}
.drawer nav{display:flex;flex-direction:column;}
.drawer nav a{
  padding:13px 0;
  font-size:16px;
  font-weight:500;
  color:var(--ink);
  border-bottom:1px solid var(--line);
}
.drawer nav a.is-active{color:var(--accent);font-weight:600;}
.drawer .drawer-cta{
  display:block;
  margin-top:18px;
  text-align:center;
  background:var(--brand);
  color:#fff;
  font-weight:600;
  padding:13px 22px;
  border-radius:999px;
}
.overlay{
  position:fixed;inset:0;z-index:70;
  background:rgba(22,19,31,.45);
  opacity:0;visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s var(--ease);
}
.overlay.is-open{opacity:1;visibility:visible;}

/* ---------- 按钮 ---------- */
.btn-main,.btn-ghost{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:15px;
  font-weight:600;
  padding:14px 32px;
  border-radius:999px;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn-main{background:var(--brand);color:#fff;}
.btn-main .arw{transition:transform .2s var(--ease);}
.btn-main:hover{background:var(--accent);color:#fff;}
.btn-main:hover .arw{transform:translateX(4px);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--surface-2);color:var(--ink);}
.btn-sm{padding:10px 22px;font-size:14px;}

/* ---------- 分类页头图 ---------- */
.cat-hero{
  position:relative;
  color:#fff;
  padding:104px 0 88px;
  background-image:linear-gradient(rgba(22,19,31,.70),rgba(22,19,31,.78)),url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.cat-hero::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:rgba(245,242,238,.18);
}
.cat-hero .crumb{
  font-size:13px;
  color:rgba(245,242,238,.72);
  margin-bottom:22px;
  font-variant-numeric:tabular-nums;
}
.cat-hero .crumb a{color:rgba(245,242,238,.72);}
.cat-hero .crumb a:hover{color:var(--accent-2);}
.cat-hero .crumb .sep{margin:0 8px;opacity:.6;}
.cat-hero h1{
  color:#fff;
  font-size:48px;
  line-height:1.25;
  max-width:16em;
  margin-bottom:20px;
}
.cat-hero .lede{
  max-width:640px;
  font-size:17px;
  line-height:1.9;
  color:rgba(245,242,238,.86);
  margin:0;
}
.cat-hero .hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:30px;
}
.tag-pill{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:13px;
  line-height:24px;
  padding:4px 13px;
  border-radius:999px;
  background:rgba(245,242,238,.10);
  border:1px solid rgba(245,242,238,.22);
  color:rgba(245,242,238,.9);
}
.tag-pill i{width:6px;height:6px;border-radius:50%;background:var(--accent-2);display:inline-block;}

/* ---------- 板块 ---------- */
.section{padding:96px 0;}
.section.tight{padding:72px 0;}
.section.alt{background:var(--surface-2);}
.section-head{max-width:720px;margin-bottom:48px;}
.section-head .eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--accent);
  letter-spacing:.08em;
  margin-bottom:14px;
}
.section-head .eyebrow::before{
  content:"";
  width:24px;height:2px;background:var(--accent);display:inline-block;
}
.section-head h2{font-size:34px;line-height:1.35;margin-bottom:14px;}
.section-head p{color:var(--ink-2);font-size:16px;margin:0;max-width:680px;}

/* ---------- 导语区 ---------- */
.intro-grid{
  display:grid;
  grid-template-columns:2fr 1fr;
  gap:48px;
  align-items:start;
}
.intro-text p{color:var(--ink-2);max-width:680px;}
.intro-text p strong{color:var(--ink);font-weight:600;}
.intro-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:28px;
}
.intro-card h3{font-size:18px;margin-bottom:18px;line-height:1.5;}
.intro-card li{
  position:relative;
  padding-left:20px;
  font-size:15px;
  color:var(--ink-2);
  line-height:1.8;
  margin-bottom:12px;
}
.intro-card li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--accent-2);
}
.intro-card li:last-child{margin-bottom:0;}

/* ---------- 两列要点 ---------- */
.key-visual{
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--sh-2);
  border:1px solid var(--line);
  margin-bottom:52px;
  background:var(--surface);
}
.key-visual img{width:100%;aspect-ratio:21/9;object-fit:cover;transition:transform .32s var(--ease);}
.key-visual:hover img{transform:scale(1.02);}
.key-columns{display:grid;grid-template-columns:1fr 1fr;gap:40px;}
.key-col{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:32px 30px;
  box-shadow:var(--sh-1);
  transition:box-shadow .24s var(--ease),transform .24s var(--ease);
}
.key-col:hover{box-shadow:var(--sh-2);transform:translateY(-4px);}
.key-col h3{
  font-size:20px;
  margin-bottom:8px;
}
.key-col .col-note{font-size:13px;color:var(--ink-2);margin-bottom:22px;}
.key-item{
  display:grid;
  grid-template-columns:44px 1fr;
  gap:14px;
  padding:18px 0;
  border-top:1px solid var(--line);
}
.key-item:first-of-type{border-top:0;padding-top:6px;}
.key-item .idx{
  font-family:var(--sans);
  font-size:22px;
  font-weight:800;
  color:var(--accent);
  line-height:1.2;
  font-variant-numeric:tabular-nums;
}
.key-item h4{font-size:16px;font-weight:600;font-family:var(--sans);margin-bottom:6px;}
.key-item p{font-size:14px;color:var(--ink-2);margin:0;line-height:1.8;}

/* ---------- 图文交替 ---------- */
.media-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.media-row + .media-row{margin-top:80px;}
.media-row.reverse .media-text{order:2;}
.media-row.reverse .media-figure{order:1;}
.media-figure{
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--sh-2);
  background:var(--surface);
}
.media-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .32s var(--ease);}
.media-figure:hover img{transform:scale(1.04);}
.media-text .badge-soft{
  display:inline-block;
  font-size:13px;
  line-height:24px;
  padding:2px 12px;
  border-radius:999px;
  background:var(--surface-2);
  color:var(--ink-2);
  margin-bottom:16px;
}
.media-text h3{font-size:26px;line-height:1.45;margin-bottom:16px;}
.media-text p{color:var(--ink-2);font-size:15.5px;}
.media-text ul{margin-top:20px;}
.media-text ul li{
  position:relative;
  padding-left:22px;
  font-size:15px;
  color:var(--ink-2);
  margin-bottom:10px;
}
.media-text ul li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:10px;height:2px;
  background:var(--accent);
}

/* ---------- 定义式双列 ---------- */
.def-list{
  border-top:1px solid var(--line);
}
.def-row{
  display:grid;
  grid-template-columns:260px 1fr;
  gap:32px;
  padding:26px 4px;
  border-bottom:1px solid var(--line);
  transition:background .2s var(--ease),padding .2s var(--ease);
}
.def-row:hover{background:var(--surface);padding-left:16px;padding-right:16px;border-radius:var(--r-sm);}
.def-row dt{
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  font-family:var(--sans);
}
.def-row dt span{
  display:block;
  font-size:12.5px;
  color:var(--ink-2);
  font-weight:400;
  margin-top:4px;
  font-family:var(--sans);
}
.def-row dd{
  margin:0;
  font-size:15px;
  color:var(--ink-2);
}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;}
.accordion-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md) !important;
  overflow:hidden;
  margin-bottom:12px;
}
.accordion-button{
  position:relative;
  width:100%;
  font-size:16px;
  font-weight:600;
  font-family:var(--sans);
  color:var(--ink);
  background:var(--surface);
  padding:20px 56px 20px 24px;
  box-shadow:none !important;
  border:0;
}
.accordion-button::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:3px;
  background:var(--accent);
  transform:scaleY(0);
  transform-origin:top;
  transition:transform .24s var(--ease);
}
.accordion-button:not(.collapsed)::before{transform:scaleY(1);}
.accordion-button::after{display:none !important;}
.accordion-button:not(.collapsed){
  color:var(--accent);
  background:var(--surface-2);
}
.accordion-button:focus{box-shadow:none !important;}
.faq-sign{
  position:absolute;
  right:22px;top:50%;
  width:16px;height:16px;
  transform:translateY(-50%);
}
.faq-sign::before,.faq-sign::after{
  content:"";
  position:absolute;
  background:var(--ink-2);
  transition:transform .24s var(--ease),background .24s var(--ease);
}
.faq-sign::before{left:0;top:7px;width:16px;height:2px;}
.faq-sign::after{left:7px;top:0;width:2px;height:16px;}
.accordion-button:not(.collapsed) .faq-sign::after{transform:scaleY(0);}
.accordion-button:not(.collapsed) .faq-sign::before{background:var(--accent);}
.accordion-body{
  padding:4px 24px 24px;
  font-size:15px;
  color:var(--ink-2);
  background:var(--surface-2);
}
.accordion-body p:last-child{margin-bottom:0;}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--dark);
  color:var(--dark-ink);
  padding:80px 0;
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
}
.cta-inner h2{
  color:#fff;
  font-size:32px;
  line-height:1.4;
  margin-bottom:12px;
}
.cta-inner p{
  color:rgba(245,242,238,.72);
  font-size:15.5px;
  margin:0;
  max-width:560px;
}
.cta-inner .btn-main{background:var(--accent);white-space:nowrap;}
.cta-inner .btn-main:hover{background:var(--accent-2);color:var(--brand);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--dark);
  color:rgba(245,242,238,.7);
  padding:72px 0 0;
  font-size:13.5px;
}
.foot-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:52px;
}
.foot-logo{
  font-size:20px;
  font-weight:700;
  color:#fff;
  margin-bottom:14px;
  letter-spacing:.02em;
}
.foot-brand p{color:rgba(245,242,238,.62);line-height:1.9;max-width:320px;margin:0;}
.foot-col h4{
  font-family:var(--sans);
  font-size:14px;
  font-weight:600;
  color:var(--dark-ink);
  margin-bottom:16px;
}
.foot-col a,.foot-col p{
  display:block;
  color:rgba(245,242,238,.7);
  font-size:13px;
  line-height:2;
  margin:0 0 4px;
}
.foot-col a:hover{color:var(--accent-2);}
.foot-bottom{
  border-top:1px solid rgba(245,242,238,.14);
  padding:22px 0 26px;
  text-align:center;
  font-size:13px;
  color:rgba(245,242,238,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .nav-side{gap:18px;}
  .nav-link{font-size:14px;}
  .logo-text{font-size:18px;}
  .cat-hero h1{font-size:42px;}
}
@media (max-width:991px){
  .nav-side{display:none;}
  .burger{display:block;}
  .nav-inner{grid-template-columns:1fr auto 1fr;}
  .section{padding:72px 0;}
  .intro-grid{grid-template-columns:1fr;gap:32px;}
  .key-columns{grid-template-columns:1fr;gap:24px;}
  .media-row{grid-template-columns:1fr;gap:28px;}
  .media-row.reverse .media-text{order:1;}
  .media-row.reverse .media-figure{order:2;}
  .media-row + .media-row{margin-top:56px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .section-head h2{font-size:28px;}
  .cat-hero{padding:76px 0 62px;}
  .cat-hero h1{font-size:34px;}
}
@media (max-width:767px){
  .wrap{padding:0 18px;}
  .topbar{font-size:12px;}
  .topbar .topbar-right{display:none;}
  .section{padding:56px 0;}
  .section.tight{padding:48px 0;}
  .cat-hero h1{font-size:30px;line-height:1.35;}
  .cat-hero .lede{font-size:15.5px;}
  .section-head h2{font-size:24px;}
  .key-visual img{aspect-ratio:16/9;}
  .def-row{grid-template-columns:1fr;gap:8px;}
  .media-text h3{font-size:22px;}
  .cta-inner h2{font-size:24px;}
  .btn-main,.btn-ghost{width:100%;justify-content:center;padding:14px 22px;}
  .cta-inner .btn-main{width:auto;align-self:stretch;text-align:center;}
  .foot-grid{grid-template-columns:1fr;gap:28px;}
  .accordion-button{font-size:15px;padding:16px 48px 16px 18px;}
  .accordion-body{padding:4px 18px 20px;}
}
@media (max-width:520px){
  .cat-hero{padding:60px 0 50px;}
  .cat-hero h1{font-size:26px;}
  .hero-tags{gap:8px;}
  .tag-pill{font-size:12px;}
  .key-col{padding:24px 20px;}
  .key-item{grid-template-columns:36px 1fr;gap:10px;}
}

/* roulang page: category3 */
:root{
  --brand:#1F1B2E;
  --accent:#E8552F;
  --accent-2:#F2B33D;
  --bg:#FAF8F5;
  --surface:#FFFFFF;
  --surface-2:#F1EDE7;
  --ink:#1B1A22;
  --ink-2:#5C5866;
  --line:#E3DED6;
  --dark:#16131F;
  --on-dark:#F5F2EE;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --sh-1:0 2px 8px rgba(31,27,46,.06);
  --sh-2:0 14px 40px rgba(31,27,46,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Noto Serif SC","Source Han Serif SC",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{font-family:var(--serif);color:var(--brand);margin:0;font-weight:700;letter-spacing:.01em}
p{margin:0 0 1.2em}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.sec-head{max-width:720px;margin-bottom:44px}
.sec-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:14px;
}
.sec-head .eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);display:block}
.sec-head h2{font-size:34px;line-height:1.4}
.sec-head p{margin-top:16px;color:var(--ink-2);max-width:640px}
.lead{color:var(--ink-2);font-size:16.5px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(250,248,245,.95);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:background .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-1)}
.nav-inner{
  position:relative;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  height:76px;gap:20px;transition:height .24s var(--ease);
}
.site-header.is-scrolled .nav-inner{height:60px}
.nav-side{display:flex;align-items:center;gap:24px}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--ink);
  padding:6px 0;white-space:nowrap;transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;
  background:var(--accent);transform:translateX(-50%);
  transition:width .2s var(--ease);
}
.nav-link:hover{color:var(--accent)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{width:100%}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand);color:#fff;border:1px solid var(--brand);
  border-radius:999px;padding:10px 22px;font-size:14px;font-weight:600;
  transition:background .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.nav-cta:hover{background:var(--accent);border-color:var(--accent);color:#fff;transform:translateY(-2px)}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--serif);font-size:20px;font-weight:700;color:var(--brand);
  transition:color .2s var(--ease);
}
.logo:hover{color:var(--accent)}
.logo-mark{display:inline-flex;color:var(--accent)}
.burger{
  display:none;position:absolute;right:24px;top:50%;transform:translateY(-50%);
  width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:var(--surface);cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.burger span{display:block;width:18px;height:2px;background:var(--brand);transition:transform .22s var(--ease),opacity .22s var(--ease)}
body.drawer-open .burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.drawer-open .burger span:nth-child(2){opacity:0}
body.drawer-open .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;top:0;left:0;right:0;z-index:120;
  background:var(--dark);color:var(--on-dark);
  padding:22px 24px 32px;
  transform:translateY(-105%);
  transition:transform .28s var(--ease);
  box-shadow:var(--sh-2);
}
body.drawer-open .drawer{transform:translateY(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-top .logo-text{font-family:var(--serif);font-size:19px;font-weight:700;color:var(--on-dark)}
.drawer-close{
  width:38px;height:38px;border-radius:10px;border:1px solid rgba(245,242,238,.24);
  background:transparent;color:var(--on-dark);font-size:18px;line-height:1;cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.drawer-close:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.drawer-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:20px}
.drawer-nav a{
  padding:13px 2px;font-size:15.5px;color:rgba(245,242,238,.78);
  border-bottom:1px solid rgba(245,242,238,.10);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.drawer-nav a:hover{color:var(--accent-2);padding-left:6px}
.drawer-nav a.is-active{color:var(--accent-2);font-weight:600}
.drawer-cta{width:100%;justify-content:center}
.drawer-mask{
  position:fixed;inset:0;z-index:110;background:rgba(22,19,31,.5);
  opacity:0;visibility:hidden;transition:opacity .26s var(--ease),visibility .26s var(--ease);
}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;color:#fff;padding:104px 0 86px;
  background-image:linear-gradient(rgba(22,19,31,.74),rgba(22,19,31,.72)),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(245,242,238,.72);margin-bottom:22px}
.crumbs a{color:rgba(245,242,238,.72);transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--accent-2)}
.crumbs .sep{opacity:.6}
.crumbs .now{color:var(--accent-2)}
.page-hero h1{color:#fff;font-size:48px;line-height:1.25;letter-spacing:.01em}
.page-hero .sub{margin-top:18px;max-width:660px;color:rgba(245,242,238,.82);font-size:17px;line-height:1.85}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}

/* ---------- badge ---------- */
.badge-tag{
  display:inline-flex;align-items:center;height:24px;padding:4px 12px;border-radius:999px;
  background:var(--surface-2);color:var(--ink-2);font-size:13px;font-weight:500;letter-spacing:.01em;
}
.badge-hot{background:var(--accent-2);color:var(--ink);font-weight:600}
.badge-dark{background:rgba(245,242,238,.14);color:var(--on-dark);border:1px solid rgba(245,242,238,.2)}

/* ---------- buttons ---------- */
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;gap:10px;
  border-radius:999px;padding:14px 32px;font-size:15px;font-weight:600;
  cursor:pointer;transition:background .22s var(--ease),color .22s var(--ease),
    border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-main{background:var(--brand);color:#fff;border:1px solid var(--brand)}
.btn-main:hover{background:var(--accent);border-color:var(--accent);color:#fff;transform:translateY(-2px);box-shadow:0 10px 26px rgba(232,85,47,.28)}
.btn-main .arw{transition:transform .22s var(--ease)}
.btn-main:hover .arw{transform:translateX(4px)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn-ghost:hover{background:var(--surface-2)}
.btn-ghost-light{background:transparent;color:var(--on-dark);border:1px solid rgba(245,242,238,.45)}
.btn-ghost-light:hover{background:rgba(245,242,238,.12);color:#fff}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}

/* ---------- intro ---------- */
.intro-grid{display:grid;grid-template-columns:1.9fr 1fr;gap:32px;align-items:start}
.intro-copy p{max-width:680px}
.intro-copy p:last-child{margin-bottom:0}
.fact-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--sh-1);
}
.fact-card h3{font-size:19px;margin-bottom:18px}
.fact-card li{
  position:relative;padding-left:20px;font-size:15px;color:var(--ink-2);
  line-height:1.8;padding-bottom:12px;
}
.fact-card li:last-child{padding-bottom:0}
.fact-card li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;
  background:var(--accent-2);
}
.fact-card li strong{color:var(--ink);font-weight:600}

/* ---------- steps ---------- */
.steps-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:56px 40px 48px;box-shadow:var(--sh-1)}
.steps{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.steps::before{content:"";position:absolute;left:0;right:0;top:32px;height:1px;background:var(--line)}
.step{position:relative;padding-right:26px}
.step-num{
  display:inline-block;font-family:"Inter","Noto Sans SC",sans-serif;font-variant-numeric:tabular-nums;
  font-size:54px;font-weight:800;line-height:1;letter-spacing:-.02em;color:var(--accent);
  background:var(--surface);padding-right:16px;position:relative;z-index:1;
}
.step h3{font-size:20px;margin:18px 0 10px}
.step p{font-size:15px;color:var(--ink-2);margin:0;line-height:1.8}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split + .split{margin-top:88px}
.split-media{border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2);border:1px solid var(--line)}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .4s var(--ease)}
.split-media:hover img{transform:scale(1.03)}
.split-body h2{font-size:30px;line-height:1.4;margin-bottom:18px}
.split-body p{color:var(--ink-2)}
.mini-list{margin-top:22px;display:flex;flex-direction:column;gap:12px}
.mini-list li{position:relative;padding-left:22px;font-size:15px;color:var(--ink-2)}
.mini-list li::before{
  content:"";position:absolute;left:0;top:12px;width:10px;height:2px;background:var(--accent);
}
.split.reverse .split-media{order:2}
.split.reverse .split-body{order:1}

/* ---------- definition grid ---------- */
.def-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 56px;margin-top:12px}
.def-item{border-top:1px solid var(--line);padding:24px 0}
.def-item h3{font-size:18px;margin-bottom:8px;font-weight:600;display:flex;align-items:center;gap:10px}
.def-item h3 span{
  font-family:"Inter",sans-serif;font-size:13px;font-weight:700;color:var(--accent-2);
  font-variant-numeric:tabular-nums;
}
.def-item p{margin:0;font-size:15px;color:var(--ink-2);line-height:1.85}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px}
.accordion-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md)!important;
  margin-bottom:14px;overflow:hidden;box-shadow:var(--sh-1);
}
.accordion-button{
  position:relative;background:var(--surface);color:var(--brand);
  font-family:var(--serif);font-size:17px;font-weight:600;line-height:1.6;
  padding:22px 56px 22px 26px;border:0;box-shadow:none!important;border-radius:0!important;
}
.accordion-button::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent);
  transform:scaleY(0);transform-origin:top;transition:transform .24s var(--ease);
}
.accordion-button:not(.collapsed)::before{transform:scaleY(1)}
.accordion-button:not(.collapsed){background:var(--surface);color:var(--accent)}
.accordion-button::after{
  background-image:none!important;
  width:10px;height:10px;border-right:2px solid var(--ink-2);border-bottom:2px solid var(--ink-2);
  transform:rotate(45deg);margin-top:-6px;transition:transform .24s var(--ease),border-color .24s var(--ease);
}
.accordion-button:not(.collapsed)::after{transform:rotate(-135deg);border-color:var(--accent);margin-top:0}
.accordion-body{padding:0 26px 24px;font-size:15.5px;color:var(--ink-2);line-height:1.9}
.accordion-body p:last-child{margin-bottom:0}

/* ---------- cta band ---------- */
.cta-band{background:var(--dark);color:var(--on-dark);padding:86px 0}
.cta-inner{max-width:720px;margin:0 auto;text-align:center}
.cta-inner h2{color:#fff;font-size:34px;line-height:1.4}
.cta-inner p{color:rgba(245,242,238,.76);margin-top:18px}
.cta-inner .btn-row{justify-content:center}
.cta-note{margin-top:22px;font-size:13px;color:rgba(245,242,238,.55)}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:rgba(245,242,238,.7);padding-top:76px}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1.2fr 1.2fr;gap:40px}
.foot-logo{font-family:var(--serif);font-size:22px;font-weight:700;color:var(--on-dark);margin-bottom:14px}
.foot-brand p{font-size:13.5px;line-height:1.9;color:rgba(245,242,238,.62);max-width:330px}
.foot-col h4{font-size:14px;font-weight:600;color:var(--on-dark);margin-bottom:16px;font-family:var(--sans)}
.foot-col a{display:block;font-size:13px;color:rgba(245,242,238,.7);padding:5px 0;transition:color .2s var(--ease),padding-left .2s var(--ease)}
.foot-col a:hover{color:var(--accent-2);padding-left:4px}
.foot-col p{font-size:13px;margin:0 0 8px;color:rgba(245,242,238,.62)}
.foot-bottom{
  border-top:1px solid rgba(245,242,238,.12);margin-top:52px;padding:24px 0;
  text-align:center;font-size:13px;color:rgba(245,242,238,.55);
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .nav-side{gap:16px}
  .nav-link{font-size:14px}
  .page-hero h1{font-size:42px}
  .split{gap:40px}
}
@media (max-width:991px){
  .nav-left,.nav-right{display:none}
  .burger{display:flex}
  .nav-inner{grid-template-columns:1fr auto 1fr}
  .page-hero{padding:88px 0 70px}
  .intro-grid{grid-template-columns:1fr}
  .steps-panel{padding:40px 26px 34px}
  .steps{grid-template-columns:repeat(2,1fr);gap:36px 0}
  .steps::before{display:none}
  .step{border-top:1px solid var(--line);padding-top:20px;padding-right:20px}
  .step-num{padding-right:0;font-size:46px}
  .split{grid-template-columns:1fr;gap:32px}
  .split.reverse .split-media{order:1}
  .split.reverse .split-body{order:2}
  .def-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .wrap{padding:0 18px}
  .section{padding:56px 0}
  .section-tight{padding:48px 0}
  .nav-inner{height:64px}
  .logo{font-size:18px}
  .page-hero{padding:64px 0 56px}
  .page-hero h1{font-size:30px;line-height:1.35}
  .page-hero .sub{font-size:15.5px}
  .sec-head h2{font-size:25px}
  .split-body h2{font-size:23px}
  .steps{grid-template-columns:1fr;gap:28px}
  .step-num{font-size:42px}
  .cta-inner h2{font-size:25px}
  .btn-main,.btn-ghost{padding:13px 24px;font-size:14.5px}
  .foot-grid{grid-template-columns:1fr}
  .accordion-button{font-size:16px;padding:18px 48px 18px 20px}
  .accordion-body{padding:0 20px 20px}
}
@media (max-width:520px){
  .page-hero h1{font-size:26px}
  .btn-row{flex-direction:column;align-items:stretch}
  .btn-row .btn-main,.btn-row .btn-ghost{justify-content:center}
}

/* roulang page: category4 */
:root{
  --brand:#1F1B2E;
  --accent:#E8552F;
  --accent-2:#F2B33D;
  --bg:#FAF8F5;
  --surface:#FFFFFF;
  --surface-2:#F1EDE7;
  --ink:#1B1A22;
  --ink-2:#5C5866;
  --line:#E3DED6;
  --dark:#16131F;
  --dark-ink:#F5F2EE;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --sh-1:0 2px 8px rgba(31,27,46,.06);
  --sh-2:0 14px 40px rgba(31,27,46,.10);
  --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(--ink);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-md);}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--accent);}
h1,h2,h3,h4{
  font-family:"Noto Serif SC","Source Han Serif SC",serif;
  color:var(--brand);
  margin:0;
  line-height:1.35;
}
h1{font-size:48px;font-weight:700;letter-spacing:-.5px;}
h2{font-size:34px;font-weight:700;}
h3{font-size:22px;font-weight:600;}
p{margin:0 0 1.2em;}
.num{font-family:"Inter","Noto Sans SC",sans-serif;font-variant-numeric:tabular-nums;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(250,248,245,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease),height .24s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.nav-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:18px;
  height:76px;
  transition:height .24s var(--ease);
}
.site-header.is-scrolled .nav-inner{height:60px;}
.nav-side{display:flex;align-items:center;gap:24px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  padding:6px 0;
  white-space:nowrap;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;
  background:var(--accent);
  transition:left .2s var(--ease),right .2s var(--ease);
}
.nav-link:hover{color:var(--brand);}
.nav-link:hover::after,.nav-link.is-active::after{left:0;right:0;}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.logo{
  display:flex;align-items:center;gap:9px;
  font-family:"Noto Serif SC",serif;
  font-size:20px;font-weight:700;color:var(--brand);
  letter-spacing:.3px;
}
.logo-mark{display:flex;color:var(--accent);}
.logo-text{white-space:nowrap;}
.nav-cta{
  display:inline-flex;align-items:center;
  background:var(--brand);color:#fff;
  font-size:14px;font-weight:600;
  padding:10px 22px;border-radius:999px;
  transition:background .22s var(--ease),transform .22s var(--ease);
  white-space:nowrap;
}
.nav-cta:hover{background:var(--accent);color:#fff;transform:translateY(-1px);}
.burger{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;padding:0 8px;
  background:transparent;border:1px solid var(--line);border-radius:var(--r-sm);
  cursor:pointer;
}
.burger span{display:block;height:2px;width:100%;background:var(--brand);transition:transform .22s var(--ease),opacity .22s var(--ease);}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* drawer */
.drawer{
  position:fixed;top:0;left:0;right:0;z-index:70;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-2);
  transform:translateY(-102%);
  transition:transform .28s var(--ease);
  padding:76px 24px 28px;
}
.drawer.is-open{transform:translateY(0);}
.drawer-close{
  position:absolute;top:18px;right:20px;
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line);background:transparent;color:var(--ink);
  font-size:18px;line-height:1;cursor:pointer;
}
.drawer a{
  display:block;padding:14px 0;font-size:16px;font-weight:500;
  border-bottom:1px dashed var(--line);
}
.drawer a:last-child{border-bottom:none;}
.drawer a.is-active{color:var(--accent);}
.mask{position:fixed;inset:0;background:rgba(22,19,31,.42);z-index:65;opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s var(--ease);}
.mask.is-open{opacity:1;visibility:visible;}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  background:var(--dark) url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  color:var(--dark-ink);
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(22,19,31,.94) 0%,rgba(22,19,31,.78) 48%,rgba(22,19,31,.58) 100%);
}
.page-hero .wrap{position:relative;z-index:2;padding-top:88px;padding-bottom:64px;}
.crumb{
  display:flex;flex-wrap:wrap;gap:8px;align-items:center;
  font-size:13px;color:rgba(245,242,238,.72);margin-bottom:22px;
}
.crumb a:hover{color:var(--accent-2);}
.crumb .sep{color:rgba(245,242,238,.45);}
.page-hero h1{color:#fff;max-width:820px;}
.page-hero .lede{
  margin-top:18px;max-width:660px;
  font-size:17px;line-height:1.9;color:rgba(245,242,238,.82);
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.hero-tags span{
  display:inline-block;
  font-size:13px;padding:5px 14px;border-radius:999px;
  border:1px solid rgba(245,242,238,.3);color:rgba(245,242,238,.86);
}
.hero-tags span.key{background:var(--accent-2);border-color:var(--accent-2);color:var(--brand);font-weight:600;}

/* ---------- layout ---------- */
.section{padding:88px 0;}
.section.tight{padding:56px 0;}
.layout{
  display:grid;
  grid-template-columns:250px 1fr;
  gap:52px;
  align-items:start;
}
.toc{
  position:sticky;top:104px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  padding:22px 20px;
}
.toc h4{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--ink-2);text-transform:uppercase;margin-bottom:14px;font-family:"Noto Sans SC",sans-serif;}
.toc ol{list-style:none;margin:0;padding:0;counter-reset:toc;}
.toc li{counter-increment:toc;margin-bottom:2px;}
.toc a{
  display:flex;gap:10px;align-items:baseline;
  font-size:14px;padding:9px 10px;border-radius:var(--r-sm);
  color:var(--ink-2);transition:background .2s var(--ease),color .2s var(--ease);
}
.toc a::before{
  content:counter(toc,decimal-leading-zero);
  font-family:"Inter",sans-serif;font-size:12px;font-variant-numeric:tabular-nums;
  color:var(--accent);font-weight:700;
}
.toc a:hover{background:var(--surface-2);color:var(--brand);}
.toc a.is-current{background:var(--surface-2);color:var(--brand);font-weight:600;}
.toc-note{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-2);line-height:1.7;
}

.flow{min-width:0;}
.flow-block{margin-bottom:72px;}
.flow-block:last-child{margin-bottom:0;}
.block-head{margin-bottom:24px;}
.block-head .eyebrow{
  display:inline-block;font-size:13px;font-weight:600;color:var(--accent);
  letter-spacing:.1em;margin-bottom:10px;
}
.block-head h2{position:relative;padding-bottom:14px;}
.block-head h2::after{
  content:"";position:absolute;left:0;bottom:0;width:48px;height:2px;background:var(--accent);
}
.flow p{max-width:680px;color:var(--ink-2);}
.flow p strong{color:var(--ink);font-weight:600;}

/* definition list */
.deflist{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0 36px;
  border-top:1px solid var(--line);
  margin-top:8px;
}
.deflist .item{
  padding:20px 0;border-bottom:1px solid var(--line);
}
.deflist dt{font-size:15px;font-weight:600;color:var(--brand);margin-bottom:6px;}
.deflist dd{margin:0;font-size:14px;color:var(--ink-2);line-height:1.8;}

/* branch cards */
.branch-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:8px;}
.branch{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);padding:26px 24px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.branch:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.branch .idx{
  font-family:"Inter",sans-serif;font-size:30px;font-weight:800;color:var(--accent-2);
  line-height:1;margin-bottom:14px;font-variant-numeric:tabular-nums;
}
.branch h3{font-size:18px;margin-bottom:10px;}
.branch p{font-size:14px;margin:0;max-width:none;}
.badge-soft{
  display:inline-block;font-size:13px;padding:4px 12px;border-radius:999px;
  background:var(--surface-2);color:var(--ink-2);margin-bottom:12px;
}
.badge-key{background:var(--accent-2);color:var(--brand);font-weight:600;}

/* figure block */
.figure-block{
  display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:28px;margin-top:8px;
}
.figure-block img{border-radius:var(--r-lg);box-shadow:var(--sh-2);width:100%;height:100%;object-fit:cover;}
.figure-block .copy h3{margin-bottom:14px;}
.figure-block .copy ul{list-style:none;margin:0;padding:0;}
.figure-block .copy li{
  position:relative;padding-left:22px;font-size:14px;color:var(--ink-2);margin-bottom:10px;line-height:1.8;
}
.figure-block .copy li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;background:var(--accent-2);
}

/* steps */
.steps{display:grid;gap:18px;margin-top:8px;counter-reset:step;}
.step{
  display:grid;grid-template-columns:88px 1fr;gap:22px;align-items:start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.step .n{
  font-family:"Inter",sans-serif;font-size:40px;font-weight:800;line-height:1;
  color:var(--brand);opacity:.16;font-variant-numeric:tabular-nums;
}
.step h3{font-size:18px;margin-bottom:8px;}
.step p{margin:0;font-size:14px;max-width:none;}

/* problem table-like list */
.problems{border-top:1px solid var(--line);margin-top:8px;}
.problem{
  display:grid;grid-template-columns:1fr 1.35fr;gap:24px;
  padding:22px 0;border-bottom:1px solid var(--line);
}
.problem .q{
  font-size:16px;font-weight:600;color:var(--brand);font-family:"Noto Serif SC",serif;
  display:flex;gap:10px;align-items:flex-start;
}
.problem .q i{color:var(--accent);font-size:14px;margin-top:6px;}
.problem .a{font-size:14px;color:var(--ink-2);margin:0;line-height:1.85;}
.problem .a .meta{display:block;margin-top:8px;font-size:13px;color:var(--ink-2);}
.problem .a .meta em{font-style:normal;color:var(--accent);font-weight:600;}

/* faq */
.accordion-custom .accordion-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md) !important;
  margin-bottom:14px;overflow:hidden;box-shadow:var(--sh-1);
}
.accordion-custom .accordion-button{
  position:relative;background:var(--surface);color:var(--brand);
  font-family:"Noto Serif SC",serif;font-size:17px;font-weight:600;
  padding:20px 52px 20px 24px;box-shadow:none;
}
.accordion-custom .accordion-button::after{
  background-image:none;content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;
  font-size:13px;color:var(--ink-2);transition:transform .22s var(--ease);position:absolute;right:24px;
}
.accordion-custom .accordion-button:not(.collapsed){
  background:var(--surface);color:var(--brand);box-shadow:none;
}
.accordion-custom .accordion-button:not(.collapsed)::after{transform:rotate(180deg);color:var(--accent);}
.accordion-custom .accordion-button:focus{box-shadow:none;border-color:var(--line);}
.accordion-custom .accordion-button::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;background:var(--accent);
  transform:scaleY(0);transform-origin:top;transition:transform .24s var(--ease);
}
.accordion-custom .accordion-button:not(.collapsed)::before{transform:scaleY(1);}
.accordion-custom .accordion-body{
  padding:0 24px 22px;font-size:15px;color:var(--ink-2);line-height:1.9;
}

/* CTA */
.cta-band{
  background:var(--dark);color:var(--dark-ink);
  border-radius:var(--r-lg);
  padding:48px 44px;
  display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:space-between;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;
  border:1px solid rgba(242,179,61,.28);
}
.cta-band h2{color:#fff;font-size:28px;margin-bottom:10px;}
.cta-band p{color:rgba(245,242,238,.78);margin:0;font-size:15px;max-width:560px;position:relative;z-index:2;}
.cta-band .cta-copy{position:relative;z-index:2;max-width:620px;}
.cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:2;}

.btn-main{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--brand);color:#fff;font-size:15px;font-weight:600;
  padding:14px 32px;border-radius:999px;border:1px solid var(--brand);
  transition:background .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn-main i{transition:transform .22s var(--ease);font-size:13px;}
.btn-main:hover{background:var(--accent);border-color:var(--accent);color:#fff;transform:translateY(-2px);}
.btn-main:hover i{transform:translateX(4px);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:10px;
  background:transparent;color:var(--ink);font-size:15px;font-weight:600;
  padding:14px 30px;border-radius:999px;border:1px solid var(--ink);
  transition:background .22s var(--ease),color .22s var(--ease);
}
.btn-ghost:hover{background:var(--surface-2);color:var(--brand);}
.cta-band .btn-main{background:var(--accent);border-color:var(--accent);color:#fff;}
.cta-band .btn-main:hover{background:#fff;border-color:#fff;color:var(--brand);}
.cta-band .btn-ghost{color:var(--dark-ink);border-color:rgba(245,242,238,.5);}
.cta-band .btn-ghost:hover{background:rgba(245,242,238,.12);color:#fff;}

/* footer */
.site-footer{background:var(--dark);color:var(--dark-ink);margin-top:96px;padding:72px 0 24px;}
.foot-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1.2fr 1.3fr;gap:40px;
  padding-bottom:40px;border-bottom:1px solid rgba(245,242,238,.14);
}
.foot-logo{font-family:"Noto Serif SC",serif;font-size:22px;font-weight:700;color:#fff;margin-bottom:14px;}
.foot-brand p{font-size:13px;color:rgba(245,242,238,.7);line-height:1.9;margin:0;max-width:320px;}
.foot-col h4{font-size:14px;font-weight:600;color:var(--dark-ink);margin-bottom:16px;font-family:"Noto Sans SC",sans-serif;}
.foot-col a,.foot-col p{display:block;font-size:13px;color:rgba(245,242,238,.7);margin:0 0 10px;transition:color .2s var(--ease);}
.foot-col a:hover{color:var(--accent-2);}
.foot-bottom{text-align:center;font-size:13px;color:rgba(245,242,238,.55);padding-top:22px;}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .nav-side{gap:18px;}
  .nav-link{font-size:14px;}
  h1{font-size:42px;}
}
@media (max-width:991px){
  .nav-side{display:none;}
  .burger{display:flex;justify-self:end;}
  .nav-inner{grid-template-columns:auto 1fr auto;}
  .logo{justify-self:center;}
  .layout{grid-template-columns:1fr;gap:36px;}
  .toc{position:static;}
  .toc ol{display:flex;flex-wrap:wrap;gap:8px;}
  .toc li{margin:0;}
  .toc a{background:var(--surface-2);}
  .branch-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .figure-block{grid-template-columns:1fr;}
}
@media (max-width:767px){
  body{font-size:15px;}
  .wrap{padding:0 18px;}
  h1{font-size:30px;line-height:1.4;}
  h2{font-size:24px;}
  h3{font-size:19px;}
  .page-hero .wrap{padding-top:56px;padding-bottom:44px;}
  .page-hero .lede{font-size:15px;}
  .section{padding:56px 0;}
  .flow-block{margin-bottom:52px;}
  .deflist{grid-template-columns:1fr;gap:0;}
  .branch-grid{grid-template-columns:1fr;}
  .step{grid-template-columns:1fr;gap:10px;}
  .step .n{font-size:30px;}
  .problem{grid-template-columns:1fr;gap:8px;}
  .cta-band{padding:32px 24px;}
  .cta-band h2{font-size:22px;}
  .cta-band .cta-actions{width:100%;}
  .cta-band .btn-main,.cta-band .btn-ghost{flex:1 1 auto;justify-content:center;}
  .site-footer{margin-top:56px;padding-top:52px;}
  .foot-grid{grid-template-columns:1fr;}
  .figure-block{padding:20px;}
}
@media (max-width:520px){
  h1{font-size:27px;}
  .hero-tags span{font-size:12px;padding:4px 11px;}
  .btn-main,.btn-ghost{padding:13px 24px;font-size:14px;}
}