/* roulang page: index */
:root{
  --bg-deep:#0F0C1A;
  --bg-deep-2:#0B0914;
  --bg-sub:#17131F;
  --bg-light:#F6F3EC;
  --star-gold:#E3B04B;
  --star-gold-deep:#C9982F;
  --nebula:#6E5AA8;
  --nebula-light:#9B8AD1;
  --text-main:#F4F1EA;
  --text-sub:#A79FB5;
  --text-dark:#1A1526;
  --text-dark-sub:#5C5470;
  --line:rgba(255,255,255,.07);
  --line-strong:rgba(255,255,255,.14);
  --gold-line:rgba(227,176,75,.45);
  --r-video:18px;
  --r-card:14px;
  --r-btn:999px;
  --r-tag:6px;
  --r-input:10px;
  --container:1240px;
  --shadow-amb:0 20px 48px rgba(0,0,0,.55);
  --dur:200ms;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--bg-deep);
  color:var(--text-main);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:radial-gradient(rgba(244,241,234,.06) 1px,transparent 1px);
  background-size:34px 34px;
  opacity:.5;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease);}
a:hover{color:var(--star-gold);}
p{margin:0 0 1em;max-width:72ch;}
h1,h2,h3,h4{margin:0 0 .6em;font-weight:700;letter-spacing:-.02em;line-height:1.25;color:var(--text-main);}
h1{font-size:clamp(34px,4.2vw,56px);line-height:1.15;}
h2{font-size:clamp(24px,2.6vw,36px);}
h3{font-size:21px;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
  position:relative;
  z-index:1;
}
.section{padding:110px 0;position:relative;z-index:1;}
.section--tight{padding:88px 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:32px;
  margin-bottom:48px;
  flex-wrap:wrap;
}
.section-head p{margin:0;color:var(--text-sub);font-size:15px;max-width:52ch;}
.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--star-gold);
  border:1px solid var(--gold-line);
  border-radius:var(--r-tag);
  padding:4px 10px;
  margin-bottom:18px;
}
.muted{color:var(--text-sub);}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn-primary{background:var(--star-gold);color:#1A1526;}
.btn-primary:hover{background:var(--star-gold-deep);color:#1A1526;transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--text-main);border-color:var(--line-strong);}
.btn-ghost:hover{background:var(--text-main);color:#1A1526;transform:translateY(-2px);}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.btn-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--text-main);
  font-size:15px;
  font-weight:600;
  background:none;
  border:0;
  padding:6px 0;
  cursor:pointer;
}
.btn-link i{transition:transform var(--dur) var(--ease);}
.btn-link:hover{color:var(--star-gold);}
.btn-link:hover i{transform:translateX(4px);}
.btn:focus-visible,.btn-link:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--star-gold);
  outline-offset:3px;
  border-radius:6px;
}

/* 导航 */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),backdrop-filter var(--dur) var(--ease);
}
.site-header.is-stuck{
  background:rgba(15,12,26,.92);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:76px;
}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--text-main);}
.brand:hover{color:var(--text-main);}
.brand-mark{
  width:22px;height:22px;
  border-radius:50%;
  background:radial-gradient(circle at 30% 30%,var(--star-gold),var(--nebula) 70%,transparent 72%);
  box-shadow:0 0 14px rgba(227,176,75,.45);
  flex:none;
}
.main-nav{display:flex;align-items:center;gap:34px;}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--text-sub);
  padding:6px 0;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  height:2px;width:0;
  background:var(--star-gold);
  transition:width var(--dur) var(--ease);
}
.nav-link:hover{color:var(--text-main);}
.nav-link:hover::after,.nav-link.active::after{width:100%;}
.nav-link.active{color:var(--text-main);}
.header-cta{display:flex;align-items:center;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line-strong);
  border-radius:10px;
  background:transparent;
  cursor:pointer;
  padding:0;
  position:relative;
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  margin:3px auto;
  background:var(--text-main);
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle.is-open span:nth-child(1){transform:translateY(5px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-5px) rotate(-45deg);}
.mobile-drawer{
  display:none;
  position:fixed;
  top:76px;left:0;right:0;bottom:0;
  background:var(--bg-deep-2);
  padding:32px;
  z-index:55;
  overflow-y:auto;
  transform:translateY(-8px);
  opacity:0;
  pointer-events:none;
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.mobile-drawer.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
.mobile-drawer a.m-link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:20px;
  font-weight:600;
  padding:18px 0;
  border-bottom:1px solid var(--line);
  color:var(--text-main);
}
.mobile-drawer a.m-link.active{color:var(--star-gold);}
.drawer-foot{margin-top:32px;font-size:14px;color:var(--text-sub);line-height:2;}

/* Hero */
.hero{
  position:relative;
  padding:170px 0 100px;
  background:
    linear-gradient(180deg,rgba(15,12,26,.4) 0%,rgba(15,12,26,.96) 78%,var(--bg-deep) 100%),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  overflow:hidden;
}
.hero::after{
  content:"";
  position:absolute;
  right:-12%;top:-18%;
  width:620px;height:620px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(110,90,168,.32),transparent 66%);
  pointer-events:none;
}
.hero-copy{position:relative;z-index:2;}
.hero h1{margin-bottom:20px;}
.hero-sub{
  font-size:17px;
  color:var(--text-sub);
  max-width:34ch;
  margin-bottom:32px;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px;}
.hero-stats{
  display:flex;
  gap:0;
  flex-wrap:wrap;
  border-top:1px solid var(--line);
  padding-top:24px;
}
.hero-stats li{
  padding:0 26px;
  border-left:1px solid var(--line);
}
.hero-stats li:first-child{padding-left:0;border-left:0;}
.hero-stats strong{display:block;font-size:24px;color:var(--star-gold);letter-spacing:-.02em;}
.hero-stats span{font-size:13px;color:var(--text-sub);}
.hero-visual{position:relative;z-index:2;}
.phone-frame{
  position:relative;
  aspect-ratio:9/16;
  max-height:600px;
  margin-left:auto;
  width:100%;
  max-width:330px;
  border-radius:26px;
  overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-amb),0 0 0 1px rgba(227,176,75,.18);
  background:linear-gradient(160deg,#1B1529,#0F0C1A);
}
.phone-frame img{width:100%;height:100%;object-fit:cover;}
.phone-frame::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:58%;
  background:linear-gradient(180deg,rgba(15,12,26,0) 0%,rgba(15,12,26,.92) 82%);
}
.phone-caption{
  position:absolute;
  left:20px;right:20px;bottom:20px;
  z-index:2;
}
.phone-caption h3{font-size:18px;margin-bottom:6px;}
.phone-caption p{font-size:13px;color:var(--text-sub);margin:0;}

/* 横向滚动片段卡 */
.clip-section{background:var(--bg-deep);}
.clip-track{
  display:flex;
  gap:22px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:6px 32px 22px;
  scrollbar-width:thin;
  scrollbar-color:var(--nebula) transparent;
}
.clip-track::-webkit-scrollbar{height:6px;}
.clip-track::-webkit-scrollbar-thumb{background:var(--nebula);border-radius:999px;}
.clip-track::-webkit-scrollbar-track{background:transparent;}
.clip-card{
  scroll-snap-align:start;
  flex:0 0 calc((100% - 88px)/4.5);
  position:relative;
  aspect-ratio:9/16;
  border-radius:var(--r-video);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-sub);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.clip-card img{width:100%;height:100%;object-fit:cover;transition:transform var(--dur) var(--ease);}
.clip-card::after{
  content:"";
  position:absolute;inset:auto 0 0 0;height:62%;
  background:linear-gradient(180deg,rgba(15,12,26,0),rgba(15,12,26,.94) 78%);
}
.clip-card:hover{transform:translateY(-4px);border-color:var(--gold-line);box-shadow:var(--shadow-amb);}
.clip-card:hover img{transform:scale(1.03);}
.clip-play{
  position:absolute;right:14px;top:14px;z-index:2;
  width:34px;height:34px;border-radius:50%;
  background:rgba(15,12,26,.6);
  border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;
  color:var(--star-gold);font-size:12px;
}
.clip-body{position:absolute;left:16px;right:16px;bottom:16px;z-index:2;}
.clip-body h3{font-size:16px;margin-bottom:8px;line-height:1.4;}
.clip-tag{
  display:inline-block;
  font-size:12px;letter-spacing:.04em;
  padding:3px 8px;border-radius:var(--r-tag);
  background:rgba(110,90,168,.28);
  color:var(--nebula-light);
  border:1px solid rgba(155,138,209,.35);
}
.clip-duration{
  position:absolute;right:14px;bottom:16px;z-index:2;
  font-size:12px;color:var(--text-sub);
}

/* 种草清单 */
.list-section{background:linear-gradient(180deg,var(--bg-deep) 0%,var(--bg-sub) 100%);}
.pick-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 40px;}
.pick-item{
  display:flex;
  gap:22px;
  padding:26px 24px;
  border-radius:var(--r-card);
  background:rgba(255,255,255,.02);
  border:1px solid var(--line);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.pick-item:nth-child(even){transform:translateY(24px);}
.pick-item:hover{border-color:var(--gold-line);transform:translateY(-4px);box-shadow:var(--shadow-amb);}
.pick-item:nth-child(even):hover{transform:translateY(20px);}
.pick-num{
  font-size:34px;
  font-weight:700;
  line-height:1;
  color:var(--star-gold);
  letter-spacing:-.03em;
  flex:none;
  min-width:52px;
}
.pick-body h3{font-size:19px;margin-bottom:8px;}
.pick-body p{font-size:14px;color:var(--text-sub);margin:0 0 12px;}
.pick-more{font-size:13px;color:var(--star-gold);display:inline-flex;align-items:center;gap:6px;}
.pick-more i{transition:transform var(--dur) var(--ease);}
.pick-item:hover .pick-more i{transform:translateX(4px);}

/* 最新信息 */
.news-section{background:var(--bg-sub);}
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.news-card{
  display:flex;
  flex-direction:column;
  background:var(--bg-deep);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 24px 22px;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:var(--gold-line);box-shadow:var(--shadow-amb);}
.news-card h3{
  font-size:18px;
  margin:14px 0 10px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-card h3 a:hover{color:var(--star-gold);}
.news-summary{
  font-size:14px;
  color:var(--text-sub);
  margin:0 0 20px;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
  max-width:none;
}
.news-meta{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-sub);
}
.news-meta .tag{
  font-size:12px;
  color:var(--nebula-light);
  background:rgba(110,90,168,.2);
  border:1px solid rgba(155,138,209,.3);
  border-radius:var(--r-tag);
  padding:3px 8px;
}
.news-empty{
  grid-column:1/-1;
  padding:48px 24px;
  text-align:center;
  color:var(--text-sub);
  border:1px dashed var(--line-strong);
  border-radius:var(--r-card);
  font-size:15px;
}

/* 口碑浅色反差区 */
.voice-section{background:var(--bg-light);color:var(--text-dark);padding:104px 0;}
.voice-section h2{color:var(--text-dark);}
.voice-section .section-head p{color:var(--text-dark-sub);}
.voice-head-note{color:var(--text-dark-sub);}
.voice-track{
  display:flex;
  gap:20px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding-bottom:16px;
  scrollbar-width:none;
}
.voice-track::-webkit-scrollbar{display:none;}
.voice-card{
  scroll-snap-align:start;
  flex:0 0 300px;
  background:#FFFDF7;
  border:1px solid rgba(26,21,38,.1);
  border-radius:var(--r-card);
  padding:24px;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.voice-card:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(26,21,38,.12);}
.voice-top{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.voice-avatar{
  width:40px;height:40px;border-radius:50%;
  background:linear-gradient(140deg,var(--nebula),var(--star-gold));
  flex:none;
}
.voice-name{font-weight:600;font-size:15px;color:var(--text-dark);}
.voice-star{color:var(--star-gold);font-size:12px;letter-spacing:2px;}
.voice-card p{font-size:14.5px;color:var(--text-dark-sub);margin:0;line-height:1.8;}

/* 信任条 */
.trust-section{background:var(--bg-deep);padding:80px 0;}
.trust-row{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.trust-item{
  padding:32px 26px;
  border-left:1px solid var(--line);
}
.trust-item:first-child{border-left:0;padding-left:0;}
.trust-item i{color:var(--star-gold);font-size:18px;margin-bottom:12px;display:block;}
.trust-item strong{display:block;font-size:16px;margin-bottom:6px;}
.trust-item span{font-size:13.5px;color:var(--text-sub);}

/* FAQ */
.faq-section{background:var(--bg-sub);}
.faq-list{max-width:900px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  background:none;
  border:0;
  color:var(--text-main);
  font-size:17px;
  font-weight:600;
  text-align:left;
  padding:24px 0;
  cursor:pointer;
  transition:color var(--dur) var(--ease);
}
.faq-q:hover{color:var(--star-gold);}
.faq-icon{
  flex:none;
  width:26px;height:26px;
  border-radius:50%;
  border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;
  color:var(--star-gold);
  font-size:12px;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(180deg);border-color:var(--gold-line);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 320ms var(--ease);
}
.faq-a p{
  color:var(--text-sub);
  font-size:15px;
  margin:0 0 24px;
  max-width:70ch;
}

/* CTA 转化区 */
.cta-section{
  background:radial-gradient(circle at 50% 0%,rgba(110,90,168,.22),transparent 62%),var(--bg-deep);
  text-align:center;
  padding:130px 0;
}
.cta-section h2{margin-bottom:16px;}
.cta-section p{color:var(--text-sub);margin:0 auto 36px;max-width:52ch;}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-bottom:44px;}
.qr-box{
  width:120px;height:120px;
  margin:0 auto;
  border-radius:12px;
  border:1px dashed var(--line-strong);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-sub);
  font-size:12px;
  line-height:1.6;
  text-align:center;
  background:rgba(255,255,255,.02);
}

/* 页脚 */
.site-footer{
  background:var(--bg-deep-2);
  border-top:1px solid var(--line);
  padding:72px 0 0;
  font-size:14px;
  line-height:2;
  color:var(--text-sub);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand p{font-size:14px;color:var(--text-sub);max-width:36ch;margin-bottom:12px;}
.footer-col h4{font-size:15px;color:var(--text-main);margin-bottom:16px;letter-spacing:0;}
.footer-col a{display:block;padding:5px 0;color:var(--text-sub);}
.footer-col a:hover{color:var(--star-gold);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-sub);
}
.footer-bottom a{color:var(--text-sub);}
.footer-bottom a:hover{color:var(--star-gold);}

/* 吸底 CTA */
.sticky-cta{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  height:56px;
  background:rgba(15,12,26,.96);
  border-top:1px solid var(--line);
  backdrop-filter:blur(10px);
  align-items:center;
  justify-content:space-between;
  padding:0 16px calc(env(safe-area-inset-bottom));
  z-index:70;
}
.sticky-cta span{font-size:14px;font-weight:600;color:var(--text-main);}
.sticky-cta .btn{height:38px;padding:0 18px;font-size:14px;}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}

/* Foundation 默认覆盖 */
.button{background:var(--star-gold);color:#1A1526;border-radius:var(--r-btn);}
.button:hover{background:var(--star-gold-deep);}
.accordion{border:0;background:transparent;}
input,textarea,select{
  border-radius:var(--r-input);
  background:var(--bg-sub);
  border:1px solid var(--line-strong);
  color:var(--text-main);
  box-shadow:none;
  height:48px;
}
input:focus,textarea:focus{outline:none;border-color:var(--star-gold);box-shadow:0 0 0 2px rgba(227,176,75,.22);}

/* 响应式 */
@media (max-width:1023px){
  .container{padding:0 24px;}
  .section{padding:80px 0;}
  .main-nav,.header-cta{display:none;}
  .nav-toggle{display:block;}
  .mobile-drawer{display:block;}
  .hero{padding:140px 0 80px;}
  .hero-visual{margin-top:48px;}
  .phone-frame{margin:0 auto;max-width:300px;}
  .hero-stats li{padding:0 18px;}
  .clip-card{flex:0 0 calc((100% - 44px)/2.1);}
  .pick-list{grid-template-columns:1fr;gap:20px;}
  .pick-item:nth-child(even){transform:none;}
  .pick-item:nth-child(even):hover{transform:translateY(-4px);}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .trust-row{grid-template-columns:repeat(2,minmax(0,1fr));}
  .trust-item{border-top:1px solid var(--line);}
  .trust-item:nth-child(1),.trust-item:nth-child(2){border-top:0;}
  .trust-item:nth-child(odd){border-left:0;padding-left:0;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:640px){
  .container{padding:0 20px;}
  .section{padding:64px 0;}
  .header-inner{height:66px;}
  .mobile-drawer{top:66px;padding:24px 20px;}
  .hero{padding:120px 0 72px;}
  .hero-sub{font-size:15.5px;max-width:none;}
  .hero-actions .btn{flex:1 1 auto;}
  .hero-stats{padding-top:20px;}
  .hero-stats li{flex:1 1 33%;padding:0 12px;}
  .hero-stats strong{font-size:20px;}
  .clip-track{padding:6px 20px 20px;}
  .clip-card{flex:0 0 calc((100% - 26px)/1.15);}
  .news-grid{grid-template-columns:1fr;}
  .voice-card{flex:0 0 84%;}
  .trust-row{grid-template-columns:1fr;}
  .trust-item{border-left:0;padding-left:0;padding-right:0;}
  .trust-item:nth-child(2){border-top:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr;}
  .cta-section{padding:88px 0;}
  .sticky-cta{display:flex;}
  .site-footer{padding-bottom:56px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  .clip-card:hover,.news-card:hover,.pick-item:hover,.voice-card:hover,.btn:hover{transform:none;}
}

/* roulang page: article */
:root{
  --bg-deep:#0F0C1A;
  --bg-sub:#17131F;
  --bg-sub-2:#1D1828;
  --bg-light:#F6F3EC;
  --star-gold:#E3B04B;
  --star-gold-dark:#C9982F;
  --nebula:#6E5AA8;
  --nebula-light:#9B8AD1;
  --text-main:#F4F1EA;
  --text-sub:#A79FB5;
  --text-dark:#1A1526;
  --text-dark-sub:#5C5470;
  --line:rgba(255,255,255,.07);
  --line-strong:rgba(255,255,255,.14);
  --line-gold:rgba(227,176,75,.45);
  --r-media:18px;
  --r-card:14px;
  --r-btn:999px;
  --r-tag:6px;
  --r-input:10px;
  --dur:200ms;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow:0 20px 48px rgba(0,0,0,.55);
  --shadow-soft:0 12px 32px rgba(0,0,0,.38);
  --container:1240px;
  --gutter:24px;
  --sec-desktop:112px;
  --sec-mobile:68px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--text-main);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    radial-gradient(rgba(244,241,234,.055) 1px, transparent 1px),
    radial-gradient(rgba(227,176,75,.05) 1px, transparent 1px);
  background-size:64px 64px, 128px 128px;
  background-position:0 0, 32px 40px;
  opacity:.9;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease);}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit;}
h1,h2,h3,h4{
  margin:0 0 .5em;
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.22;
  color:var(--text-main);
}
h1{font-size:clamp(34px,4.2vw,56px);line-height:1.15;}
h2{font-size:clamp(24px,2.6vw,36px);}
h3{font-size:21px;line-height:1.35;}
p{margin:0 0 1.1em;max-width:72ch;}
ul,ol{margin:0 0 1.1em;padding-left:1.2em;}
:focus-visible{outline:2px solid var(--star-gold);outline-offset:3px;border-radius:4px;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
  position:relative;
  z-index:2;
}
.section{padding:var(--sec-desktop) 0;position:relative;z-index:2;}
.section--tight{padding:64px 0;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--star-gold);
  text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--star-gold);opacity:.7;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:48px;
  flex-wrap:wrap;
}
.section-head p{margin:0;color:var(--text-sub);font-size:14px;max-width:46ch;}
/* ===== 导航 ===== */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background var(--dur) var(--ease), border-color var(--dur) var(--ease), backdrop-filter var(--dur) var(--ease);
}
.site-header.is-scrolled{
  background:rgba(15,12,26,.94);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:76px;
  gap:24px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--text-main);
  flex:0 0 auto;
}
.brand-mark{
  width:22px;
  height:22px;
  border-radius:50%;
  position:relative;
  background:radial-gradient(circle at 30% 30%, var(--star-gold) 0 22%, transparent 24%),
             radial-gradient(circle at 70% 62%, var(--nebula-light) 0 18%, transparent 20%),
             radial-gradient(circle at 46% 80%, rgba(244,241,234,.85) 0 10%, transparent 12%),
             linear-gradient(150deg,#241C36,#120E1E);
  box-shadow:0 0 0 1px rgba(227,176,75,.35), 0 0 18px rgba(227,176,75,.22);
}
.brand-text{white-space:nowrap;}
.main-nav{
  display:flex;
  align-items:center;
  gap:34px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--text-sub);
  padding:6px 0;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  height:2px;width:0;
  background:var(--star-gold);
  transition:width var(--dur) var(--ease);
}
.nav-link:hover{color:var(--text-main);}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--text-main);}
.nav-link.active::after{width:100%;}
.nav-actions{display:flex;align-items:center;gap:16px;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line-strong);
  align-items:center;
  justify-content:center;
  color:var(--text-main);
  font-size:16px;
}
.nav-drawer{
  position:fixed;
  inset:0;
  z-index:70;
  background:rgba(12,9,21,.98);
  backdrop-filter:blur(14px);
  padding:22px 24px 36px;
  display:none;
  flex-direction:column;
  overflow-y:auto;
}
.nav-drawer.is-open{display:flex;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;min-height:56px;}
.drawer-close{
  width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;
}
.drawer-links{display:flex;flex-direction:column;margin-top:32px;}
.drawer-links a{
  font-size:22px;
  font-weight:600;
  padding:18px 0;
  border-bottom:1px solid var(--line);
  color:var(--text-main);
}
.drawer-links a.active{color:var(--star-gold);}
.drawer-foot{
  margin-top:auto;
  padding-top:32px;
  color:var(--text-sub);
  font-size:14px;
  line-height:2;
}
.drawer-foot strong{display:block;color:var(--text-main);font-weight:600;margin-bottom:4px;}
/* ===== 按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  transition:transform var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--star-gold);color:#1A1526;}
.btn-primary:hover{background:var(--star-gold-dark);color:#140F1F;transform:translateY(-2px);}
.btn-ghost{border:1px solid rgba(244,241,234,.5);color:var(--text-main);background:transparent;}
.btn-ghost:hover{background:var(--text-main);color:#17131F;border-color:var(--text-main);transform:translateY(-2px);}
.btn-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--text-main);
  font-size:15px;
  font-weight:600;
  padding:8px 0;
}
.btn-link i{transition:transform var(--dur) var(--ease);}
.btn-link:hover{color:var(--star-gold);}
.btn-link:hover i{transform:translateX(4px);}
/* ===== 文章头部 ===== */
.article-hero{
  position:relative;
  padding:180px 0 72px;
  background-image:linear-gradient(180deg, rgba(15,12,26,.72) 0%, rgba(15,12,26,.94) 62%, var(--bg-deep) 100%), url("/assets/images/backpic/back-3.webp");
  background-size:cover;
  background-position:center 30%;
  border-bottom:1px solid var(--line);
}
.article-hero::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg, transparent, var(--line-gold), transparent);
}
.article-hero h1{
  max-width:20ch;
  margin-bottom:20px;
}
.article-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:12px 22px;
  font-size:13px;
  color:var(--text-sub);
}
.meta-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:var(--r-tag);
  background:rgba(110,90,168,.22);
  border:1px solid rgba(155,138,209,.38);
  color:#D4CBEE;
  font-size:12px;
  letter-spacing:.04em;
}
.meta-item{display:inline-flex;align-items:center;gap:7px;}
.meta-item i{color:var(--star-gold);font-size:12px;}
/* ===== 面包屑 ===== */
.breadcrumb-bar{
  background:var(--bg-sub);
  border-bottom:1px solid var(--line);
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-sub);
  padding:14px 0;
  margin:0;
  list-style:none;
}
.breadcrumb li{display:flex;align-items:center;gap:10px;}
.breadcrumb li+li::before{content:"/";color:rgba(167,159,181,.5);}
.breadcrumb a:hover{color:var(--star-gold);}
.breadcrumb .current{color:var(--text-sub);cursor:default;}
/* ===== 正文区 ===== */
.article-layout{padding:72px 0 96px;}
.article-grid{display:flex;gap:56px;align-items:flex-start;}
.article-main{flex:1 1 auto;min-width:0;}
.article-body{
  max-width:760px;
  font-size:16px;
  line-height:1.85;
  color:rgba(244,241,234,.9);
}
.article-body>p:first-of-type{
  font-size:17px;
  color:var(--text-main);
}
.article-body p{margin:0 0 1.28em;max-width:72ch;}
.article-body h2{
  font-size:clamp(22px,2.2vw,28px);
  margin:48px 0 18px;
  padding-left:16px;
  position:relative;
  letter-spacing:-.02em;
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;top:.18em;
  width:3px;height:1em;
  background:var(--star-gold);
  border-radius:2px;
}
.article-body h3{font-size:19px;margin:32px 0 14px;color:var(--text-main);}
.article-body a{color:var(--star-gold);border-bottom:1px solid rgba(227,176,75,.35);}
.article-body a:hover{border-bottom-color:var(--star-gold);}
.article-body strong{color:var(--text-main);font-weight:700;}
.article-body ul,.article-body ol{padding-left:0;list-style:none;margin:0 0 1.4em;}
.article-body ul li,.article-body ol li{
  position:relative;
  padding-left:22px;
  margin-bottom:9px;
  color:rgba(244,241,234,.86);
}
.article-body ul li::before{
  content:"";
  position:absolute;
  left:2px;top:.78em;
  width:9px;height:2px;
  background:var(--star-gold);
  border-radius:2px;
}
.article-body ol{counter-reset:olc;}
.article-body ol li::before{
  counter-increment:olc;
  content:counter(olc,decimal-leading-zero);
  position:absolute;
  left:0;top:0;
  font-size:12px;
  font-weight:700;
  color:var(--star-gold);
  top:.32em;
}
.article-body blockquote{
  margin:28px 0;
  padding:6px 0 6px 20px;
  border-left:3px solid var(--star-gold);
  color:var(--text-sub);
}
.article-body blockquote p{margin:0;color:var(--text-sub);}
.article-body img{
  border-radius:var(--r-card);
  margin:28px 0 10px;
  border:1px solid var(--line);
}
.article-body figure{margin:28px 0;}
.article-body figcaption{
  font-size:13px;
  color:var(--text-sub);
  text-align:center;
  margin-top:0;
}
.article-body table{
  width:100%;
  display:block;
  overflow-x:auto;
  border-collapse:collapse;
  font-size:14px;
  margin:26px 0;
  border:1px solid var(--line);
  border-radius:var(--r-card);
}
.article-body th,.article-body td{
  padding:12px 16px;
  border-bottom:1px solid var(--line);
  text-align:left;
  white-space:nowrap;
}
.article-body th{background:rgba(110,90,168,.16);color:var(--text-main);font-weight:600;}
.article-body pre{
  background:var(--bg-sub);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:18px 20px;
  overflow-x:auto;
  font-size:13.5px;
  line-height:1.7;
  color:#D9D3EA;
  margin:24px 0;
}
.article-body code{
  font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  background:rgba(110,90,168,.18);
  border:1px solid var(--line);
  border-radius:6px;
  padding:1px 6px;
  font-size:13.5px;
  color:#DCD3F0;
}
.article-body pre code{background:none;border:0;padding:0;color:inherit;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0;}
/* 空态 */
.article-empty{
  max-width:620px;
  padding:56px 40px;
  border-radius:var(--r-card);
  background:var(--bg-sub);
  box-shadow:inset 0 0 0 1px var(--line), var(--shadow-soft);
  text-align:center;
}
.article-empty i{font-size:28px;color:var(--star-gold);margin-bottom:16px;display:block;}
.article-empty h2{font-size:22px;margin-bottom:10px;}
.article-empty p{color:var(--text-sub);font-size:15px;margin:0 auto 24px;max-width:40ch;}
/* 目录 */
.article-toc{
  flex:0 0 248px;
  position:sticky;
  top:108px;
  align-self:flex-start;
  border-left:1px solid var(--line);
  padding-left:22px;
}
.toc-title{
  font-size:12px;
  letter-spacing:.16em;
  color:var(--text-sub);
  margin-bottom:16px;
  text-transform:uppercase;
}
.toc-list{list-style:none;margin:0;padding:0;}
.toc-list a{
  display:block;
  font-size:13.5px;
  line-height:1.6;
  color:var(--text-sub);
  padding:7px 0 7px 12px;
  border-left:1px solid transparent;
  margin-left:-23px;
  transition:color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.toc-list a:hover{color:var(--text-main);}
.toc-list a.is-active{color:var(--star-gold);border-left-color:var(--star-gold);}
/* 动作区 */
.article-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px 32px;
  margin-top:56px;
  padding-top:28px;
  border-top:1px solid var(--line);
  max-width:760px;
}
/* 卡片通用 */
.card{
  position:relative;
  background:var(--bg-sub);
  border-radius:var(--r-card);
  box-shadow:inset 0 0 0 1px var(--line), var(--shadow-soft);
  transition:transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  height:100%;
}
.card:hover{
  transform:translateY(-4px);
  box-shadow:inset 0 0 0 1px var(--line-gold), var(--shadow);
}
.card-media{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:linear-gradient(160deg,#241C36,#120E1E);
}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms var(--ease);}
.card:hover .card-media img{transform:scale(1.03);}
.card-media::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:58%;
  background:linear-gradient(180deg, rgba(15,12,26,0), rgba(15,12,26,.82));
}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.card-body h3{font-size:18px;margin:0;line-height:1.45;}
.card-body p{font-size:14px;color:var(--text-sub);margin:0;line-height:1.75;}
.card-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:12.5px;
  color:var(--text-sub);
  padding-top:6px;
}
.card-foot .go{display:inline-flex;align-items:center;gap:7px;color:var(--star-gold);font-weight:600;}
.card-foot .go i{transition:transform var(--dur) var(--ease);}
.card:hover .card-foot .go i{transform:translateX(4px);}
.tag{
  display:inline-flex;
  align-items:center;
  padding:3px 10px;
  border-radius:var(--r-tag);
  font-size:12px;
  letter-spacing:.04em;
  background:rgba(110,90,168,.2);
  border:1px solid rgba(155,138,209,.35);
  color:#D2C8EE;
}
.tag--gold{background:rgba(227,176,75,.14);border-color:rgba(227,176,75,.4);color:#F0CE86;}
/* 相关阅读 */
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
/* CTA 大区 */
.cta-band{
  padding:var(--sec-desktop) 0;
  position:relative;
  background:
    radial-gradient(900px 320px at 50% 0%, rgba(110,90,168,.24), transparent 70%),
    var(--bg-deep);
  border-top:1px solid var(--line);
  text-align:center;
}
.cta-band h2{max-width:22ch;margin:0 auto 16px;}
.cta-band p{color:var(--text-sub);margin:0 auto 32px;max-width:52ch;font-size:15px;}
.cta-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;}
/* 页脚 */
.site-footer{
  background:#0B0916;
  border-top:1px solid var(--line);
  padding:72px 0 28px;
  font-size:14px;
  line-height:2;
  position:relative;
  z-index:2;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px 32px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{color:var(--text-sub);font-size:14px;max-width:34ch;margin:0 0 6px;}
.footer-col h4{
  font-size:13px;
  letter-spacing:.12em;
  color:var(--text-main);
  margin:6px 0 16px;
  font-weight:600;
}
.footer-col a{
  display:block;
  color:var(--text-sub);
  padding:3px 0;
  font-size:14px;
}
.footer-col a:hover{color:var(--star-gold);}
.footer-bottom{
  margin-top:52px;
  padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  color:var(--text-sub);
  font-size:13px;
}
/* 动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease), transform 420ms var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
  .card:hover{transform:none;}
  .btn:hover{transform:none;}
}
/* 响应式 */
@media (max-width:1439px){
  :root{--container:1180px;}
}
@media (max-width:1023px){
  .main-nav{display:none;}
  .nav-toggle{display:flex;}
  .container{padding:0 24px;}
  .section{padding:80px 0;}
  .article-hero{padding:150px 0 56px;}
  .article-toc{display:none;}
  .article-grid{gap:0;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:640px){
  :root{--sec-desktop:64px;--gutter:16px;}
  .container{padding:0 20px;}
  .section{padding:var(--sec-mobile) 0;}
  .header-inner{min-height:64px;}
  .brand{font-size:16px;}
  .article-hero{padding:126px 0 44px;}
  .article-hero h1{max-width:none;font-size:clamp(26px,7vw,34px);}
  .article-meta{gap:10px 16px;}
  .article-layout{padding:48px 0 64px;}
  .article-body{font-size:15.5px;}
  .article-body h2{margin-top:36px;}
  .article-empty{padding:40px 22px;}
  .related-grid{grid-template-columns:1fr;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;}
  .article-actions{gap:6px 24px;}
}
@media (max-width:400px){
  .brand-text{font-size:15px;}
}

/* roulang page: category1 */
:root{
  --bg-deep:#0F0C1A;
  --bg-deeper:#0B0913;
  --bg-sub:#17131F;
  --bg-light:#F6F3EC;
  --star-gold:#E3B04B;
  --star-gold-dark:#C9982F;
  --nebula:#6E5AA8;
  --nebula-light:#9B8AD1;
  --text-main:#F4F1EA;
  --text-sub:#A79FB5;
  --text-dark:#1A1526;
  --text-dark-sub:#5C5470;
  --line:rgba(244,241,234,.10);
  --line-strong:rgba(244,241,234,.20);
  --ring:0 0 0 1px rgba(244,241,234,.07);
  --shadow-ambient:0 20px 48px rgba(0,0,0,.55);
  --radius-lg:18px;
  --radius:14px;
  --radius-sm:6px;
  --radius-pill:999px;
  --dur:200ms;
  --ease:cubic-bezier(.22,.61,.36,1);
  --section-y:112px;
  --container-max:1240px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--text-main);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:radial-gradient(rgba(244,241,234,.06) 1px, transparent 1px);
  background-size:34px 34px;
  opacity:.5;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease);}
h1,h2,h3,h4{letter-spacing:-.02em;margin:0;color:var(--text-main);font-weight:700;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
.container{
  width:100%;
  max-width:var(--container-max);
  margin:0 auto;
  padding:0 32px;
  position:relative;
  z-index:1;
}
.section{padding:var(--section-y) 0;position:relative;z-index:1;}
.section-title{font-size:clamp(24px,2.6vw,36px);line-height:1.25;margin-bottom:14px;}
.section-desc{color:var(--text-sub);font-size:15px;max-width:72ch;}
.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--nebula-light);
  border:1px solid rgba(155,138,209,.35);
  border-radius:var(--radius-sm);
  padding:4px 10px;
  margin-bottom:18px;
  text-transform:uppercase;
}
:focus-visible{outline:2px solid var(--star-gold);outline-offset:3px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 26px;
  border-radius:var(--radius-pill);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  border:1px solid transparent;
  transition:transform var(--dur) var(--ease), background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn-primary{background:var(--star-gold);color:#181222;}
.btn-primary:hover{background:var(--star-gold-dark);color:#0F0C1A;transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--text-main);border-color:rgba(244,241,234,.45);}
.btn-ghost:hover{background:var(--text-main);color:var(--text-dark);border-color:var(--text-main);}
.btn-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--text-main);
  font-weight:600;
  font-size:15px;
}
.btn-link span{transition:transform var(--dur) var(--ease);display:inline-block;}
.btn-link:hover{color:var(--star-gold);}
.btn-link:hover span{transform:translateX(4px);}
.btn:focus-visible,.btn-link:focus-visible{outline:2px solid var(--star-gold);outline-offset:3px;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:60;
  transition:background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(15,12,26,.94);
  backdrop-filter:blur(10px);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:76px;
  gap:24px;
}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:22px;height:22px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%, var(--star-gold) 0 22%, rgba(110,90,168,.9) 45%, rgba(15,12,26,0) 72%);
  box-shadow:0 0 0 1px rgba(227,176,75,.5), 0 0 18px rgba(227,176,75,.35);
  flex:none;
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--text-main);}
.main-nav{display:flex;align-items:center;gap:32px;}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--text-sub);
  padding:6px 0;
}
.nav-link::after{
  content:"";
  position:absolute;left:0;bottom:0;
  height:2px;width:0;
  background:var(--star-gold);
  transition:width var(--dur) var(--ease);
}
.nav-link:hover{color:var(--text-main);}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--text-main);}
.nav-link.active::after{width:100%;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:10px;
  border:1px solid var(--line-strong);
  background:transparent;
  padding:0;
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--text-main);border-radius:2px;transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-drawer{
  position:fixed;
  inset:0;
  z-index:55;
  background:rgba(11,9,19,.98);
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  padding:104px 24px 32px;
  opacity:0;
  visibility:hidden;
  transform:translateY(-8px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur);
}
.mobile-drawer.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.drawer-nav{display:flex;flex-direction:column;gap:6px;}
.drawer-nav a{
  font-size:20px;
  font-weight:600;
  padding:16px 0;
  border-bottom:1px solid var(--line);
  color:var(--text-sub);
}
.drawer-nav a.active,.drawer-nav a:hover{color:var(--star-gold);}
.drawer-foot{border-top:1px solid var(--line);padding-top:18px;color:var(--text-sub);font-size:14px;line-height:2;}

/* ---------- 页面 Hero ---------- */
.page-hero{
  position:relative;
  min-height:320px;
  display:flex;
  align-items:flex-end;
  padding:140px 0 48px;
  background-color:var(--bg-sub);
  background-image:
    linear-gradient(100deg, rgba(15,12,26,.94) 0%, rgba(15,12,26,.72) 46%, rgba(15,12,26,.45) 100%),
    url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero h1{
  font-size:clamp(30px,3.6vw,46px);
  line-height:1.18;
  max-width:22ch;
  margin:0 0 16px;
}
.page-hero p{
  color:var(--text-sub);
  font-size:16px;
  max-width:60ch;
  margin:0;
}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:24px;
}
.chip{
  display:inline-block;
  font-size:12px;
  letter-spacing:.04em;
  padding:4px 12px;
  border-radius:var(--radius-sm);
  color:var(--nebula-light);
  border:1px solid rgba(155,138,209,.4);
  background:rgba(110,90,168,.16);
}
.breadcrumb{
  font-size:13px;
  color:var(--text-sub);
  margin-bottom:16px;
}
.breadcrumb a{color:var(--text-sub);}
.breadcrumb a:hover{color:var(--star-gold);}
.breadcrumb span.sep{margin:0 8px;opacity:.5;}
.breadcrumb span.now{color:var(--text-sub);}

/* ---------- 主体两栏 ---------- */
.layout{padding:80px 0 var(--section-y);position:relative;z-index:1;}
.side-nav-inner{
  position:sticky;
  top:100px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--bg-sub);
  padding:22px 20px;
}
.side-nav-title{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--text-sub);
  margin:0 0 14px;
}
.side-link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:11px 0;
  font-size:14px;
  color:var(--text-sub);
  border-bottom:1px solid var(--line);
}
.side-link:last-child{border-bottom:0;}
.side-link::before{
  content:"";
  width:3px;height:14px;border-radius:2px;
  background:transparent;
  transition:background-color var(--dur) var(--ease);
  flex:none;
}
.side-link:hover{color:var(--text-main);}
.side-link.active{color:var(--text-main);}
.side-link.active::before{background:var(--star-gold);}
.side-note{margin-top:18px;font-size:13px;color:var(--text-sub);line-height:1.7;}

.content-block{padding-bottom:56px;}
.content-block h2{font-size:clamp(22px,2.2vw,30px);margin-bottom:16px;}
.content-block p{color:var(--text-sub);max-width:72ch;}
.content-block p strong{color:var(--text-main);font-weight:600;}

/* ---------- 图文交替行 ---------- */
.media-row{
  display:flex;
  align-items:center;
  gap:44px;
  padding:38px 0;
  border-top:1px solid var(--line);
}
.media-row:first-of-type{border-top:0;padding-top:8px;}
.media-row.reverse{flex-direction:row-reverse;}
.media-figure{
  flex:0 0 46%;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-ambient);
  background:var(--bg-sub);
}
.media-figure img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform var(--dur) var(--ease);
}
.media-row:hover .media-figure img{transform:scale(1.03);}
.media-body{flex:1 1 auto;min-width:0;}
.index-tag{
  display:inline-block;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--star-gold);
  border:1px solid rgba(227,176,75,.4);
  border-radius:var(--radius-sm);
  padding:3px 10px;
  margin-bottom:14px;
}
.media-body h3{font-size:21px;margin-bottom:12px;}
.media-body p{color:var(--text-sub);font-size:15px;}
.media-points{margin-top:16px;display:flex;flex-direction:column;gap:8px;}
.media-points li{
  position:relative;
  padding-left:18px;
  font-size:14px;
  color:var(--text-main);
}
.media-points li::before{
  content:"";
  position:absolute;left:0;top:.75em;
  width:8px;height:2px;border-radius:2px;
  background:var(--star-gold);
}

/* ---------- 参数信息条 ---------- */
.spec-bar{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  margin-top:14px;
}
.spec-item{
  padding:26px 24px;
  border-left:1px solid var(--line);
}
.spec-item:first-child{border-left:0;padding-left:0;}
.spec-item h4{font-size:13px;color:var(--text-sub);font-weight:500;margin-bottom:8px;letter-spacing:.04em;}
.spec-item p{font-size:15px;color:var(--text-main);margin:0;}

/* ---------- FAQ ---------- */
.faq-section{border-top:1px solid var(--line);}
ul.accordion{
  border:0;
  background:transparent;
  margin:26px 0 0;
}
ul.accordion li.accordion-item{
  border:0;
  border-bottom:1px solid var(--line);
  background:transparent;
}
ul.accordion .accordion-title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:22px 0;
  font-size:17px;
  font-weight:600;
  color:var(--text-main);
  border:0;
  background:transparent;
}
ul.accordion .accordion-title::before{
  content:"+";
  order:2;
  font-size:20px;
  font-weight:400;
  color:var(--star-gold);
  line-height:1;
  transition:transform var(--dur) var(--ease);
}
ul.accordion .accordion-title[aria-expanded="true"]::before{content:"−";transform:rotate(180deg);}
ul.accordion .accordion-content{
  padding:0 0 24px;
  background:transparent;
  border:0;
  color:var(--text-sub);
  font-size:15px;
  line-height:1.85;
}
ul.accordion .accordion-content p{color:var(--text-sub);}

/* ---------- 结尾 CTA ---------- */
.cta-section{border-top:1px solid var(--line);}
.cta-panel{
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:linear-gradient(160deg, rgba(110,90,168,.18), rgba(23,19,31,.9) 62%);
  padding:56px 48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  flex-wrap:wrap;
  box-shadow:var(--shadow-ambient);
}
.cta-panel h2{font-size:clamp(22px,2.4vw,32px);margin-bottom:12px;}
.cta-panel p{color:var(--text-sub);max-width:56ch;margin:0;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-deeper);
  border-top:1px solid var(--line);
  padding:72px 0 28px;
  font-size:14px;
  color:var(--text-sub);
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-text{font-size:16px;}
.footer-brand p{line-height:2;margin-bottom:6px;color:var(--text-sub);max-width:38ch;}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text-main);margin-bottom:14px;}
.footer-col a{display:block;padding:5px 0;color:var(--text-sub);}
.footer-col a:hover{color:var(--star-gold);}
.footer-bottom{
  margin-top:48px;
  padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-sub);
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1023px){
  .container{padding:0 24px;}
  :root{--section-y:80px;}
  .main-nav{display:none;}
  .nav-toggle{display:flex;}
  .layout{padding:56px 0 80px;}
  .side-nav-inner{position:static;margin-bottom:36px;display:flex;gap:8px;overflow-x:auto;padding:12px 14px;}
  .side-nav-title{display:none;}
  .side-link{border-bottom:0;white-space:nowrap;padding:8px 4px;}
  .side-note{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .spec-bar{grid-template-columns:1fr 1fr;}
  .spec-item{border-left:1px solid var(--line);padding-left:24px;}
  .spec-item:nth-child(odd){border-left:0;padding-left:0;}
  .cta-panel{padding:40px 28px;}
}
@media screen and (max-width:640px){
  .container{padding:0 20px;}
  :root{--section-y:64px;}
  .page-hero{min-height:260px;padding:120px 0 36px;}
  .page-hero h1{font-size:26px;}
  .media-row,.media-row.reverse{flex-direction:column;gap:20px;padding:28px 0;}
  .media-figure{flex:0 0 auto;width:100%;}
  .spec-bar{grid-template-columns:1fr;}
  .spec-item{border-left:0;padding-left:0;border-top:1px solid var(--line);}
  .spec-item:first-child{border-top:0;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-panel{padding:32px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 100%;}
  .btn{min-height:48px;}
  .footer-bottom{font-size:12px;}
}
@media screen and (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root{
  --bg-deep:#0F0C1A;
  --bg-sub:#17131F;
  --bg-light:#F6F3EC;
  --star-gold:#E3B04B;
  --star-gold-dark:#C9982F;
  --nebula:#6E5AA8;
  --nebula-light:#9B8AD1;
  --text-main:#F4F1EA;
  --text-sub:#A79FB5;
  --text-dark:#1A1526;
  --text-dark-sub:#5C5470;
  --line:rgba(244,241,234,.10);
  --line-strong:rgba(244,241,234,.18);
  --radius-card:14px;
  --radius-video:18px;
  --radius-pill:999px;
  --radius-tag:6px;
  --radius-input:10px;
  --shadow-env:0 20px 48px rgba(0,0,0,.55);
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:200ms;
  --space-section:104px;
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--text-main);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:radial-gradient(rgba(244,241,234,.055) 1px,transparent 1px);
  background-size:38px 38px;
  opacity:.9;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--text-main);text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{color:var(--star-gold)}
p{margin:0 0 1.1em;max-width:72ch}
h1,h2,h3,h4{
  font-weight:700;
  letter-spacing:-0.02em;
  color:var(--text-main);
  margin:0 0 .6em;
  line-height:1.25;
}
h1{font-size:clamp(30px,3.6vw,46px);line-height:1.18}
h2{font-size:clamp(24px,2.6vw,36px)}
h3{font-size:21px}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--star-gold);outline-offset:3px;border-radius:4px}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
  position:relative;
  z-index:1;
}
.section{padding:var(--space-section) 0}
.section-tight{padding:72px 0}
.section-head{margin-bottom:44px}
.section-head h2{margin-bottom:10px}
.section-sub{color:var(--text-sub);font-size:15px;max-width:66ch}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),backdrop-filter var(--dur) var(--ease);
}
.site-header.is-solid{
  background:rgba(15,12,26,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:76px;
  gap:24px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size:17px;
  color:var(--text-main);
  letter-spacing:-0.01em;
}
.brand:hover{color:var(--text-main)}
.brand-mark{
  width:20px;height:20px;
  flex:0 0 20px;
  border-radius:50%;
  background:radial-gradient(circle at 30% 30%,var(--star-gold) 0 28%,rgba(227,176,75,.35) 34%,transparent 62%),
             radial-gradient(circle at 72% 70%,var(--nebula-light) 0 18%,transparent 56%);
  box-shadow:0 0 0 1px rgba(227,176,75,.35);
}
.brand-text{white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:32px}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--text-sub);
  padding:6px 0;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:0;height:2px;
  background:var(--star-gold);
  transition:width var(--dur) var(--ease);
}
.nav-link:hover{color:var(--text-main)}
.nav-link:hover::after{width:100%}
.nav-link.active{color:var(--text-main)}
.nav-link.active::after{width:100%}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line-strong);
  background:transparent;
  border-radius:10px;
  color:var(--text-main);
  font-size:18px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
}
.mobile-drawer{
  position:fixed;
  inset:0;
  z-index:90;
  background:rgba(15,12,26,.985);
  display:flex;
  flex-direction:column;
  padding:26px 24px 34px;
  transform:translateY(-100%);
  opacity:0;
  visibility:hidden;
  transition:transform 240ms var(--ease),opacity 240ms var(--ease),visibility 240ms;
}
.mobile-drawer.is-open{transform:translateY(0);opacity:1;visibility:visible}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:40px}
.drawer-close{
  width:44px;height:44px;border-radius:10px;
  border:1px solid var(--line-strong);
  background:transparent;color:var(--text-main);font-size:18px;cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;gap:8px}
.drawer-nav a{
  font-size:20px;
  font-weight:600;
  padding:14px 0;
  border-bottom:1px solid var(--line);
  color:var(--text-main);
}
.drawer-nav a.active{color:var(--star-gold)}
.drawer-foot{margin-top:auto;color:var(--text-sub);font-size:14px;line-height:2}
.drawer-foot a{color:var(--star-gold)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--radius-pill);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--star-gold);color:var(--text-dark)}
.btn-primary:hover{background:var(--star-gold-dark);color:var(--text-dark);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--text-main);border-color:var(--line-strong)}
.btn-ghost:hover{background:var(--text-main);color:var(--text-dark);border-color:var(--text-main)}
.btn-text{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--text-main);font-weight:600;font-size:15px;
  padding:8px 0;
}
.btn-text i{transition:transform var(--dur) var(--ease)}
.btn-text:hover{color:var(--star-gold)}
.btn-text:hover i{transform:translateX(4px)}
.btn-block{width:100%}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  letter-spacing:.04em;
  padding:4px 10px;
  border-radius:var(--radius-tag);
  background:rgba(110,90,168,.22);
  color:var(--nebula-light);
  border:1px solid rgba(155,138,209,.28);
}
.tag-gold{background:rgba(227,176,75,.14);color:var(--star-gold);border-color:rgba(227,176,75,.32)}
.tag-outline{background:transparent;color:var(--text-sub);border-color:var(--line-strong)}

/* ---------- 分类页 Hero ---------- */
.cat-hero{
  position:relative;
  margin-top:76px;
  padding:96px 0 64px;
  text-align:center;
  background-image:linear-gradient(180deg,rgba(15,12,26,.82) 0%,rgba(15,12,26,.92) 55%,var(--bg-deep) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.cat-hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(244,241,234,.06) 1px,transparent 1px);
  background-size:30px 30px;
  pointer-events:none;
}
.cat-hero .container{max-width:880px}
.cat-hero h1{margin:18px 0 16px}
.cat-hero .lead{
  color:var(--text-sub);
  font-size:16px;
  max-width:62ch;
  margin:0 auto;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:26px}
.breadcrumb-line{
  font-size:13px;
  color:var(--text-sub);
  display:flex;
  gap:10px;
  justify-content:center;
  align-items:center;
}
.breadcrumb-line a{color:var(--text-sub)}
.breadcrumb-line a:hover{color:var(--star-gold)}
.breadcrumb-line .sep{opacity:.5}
.breadcrumb-line .current{color:var(--star-gold)}

/* ---------- 信息条 ---------- */
.info-strip{padding:0 0 8px;margin-top:-38px}
.info-strip-inner{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  background:var(--bg-sub);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-env);
  overflow:hidden;
}
.info-item{
  padding:24px 26px;
  border-right:1px solid var(--line);
}
.info-item:last-child{border-right:0}
.info-item .num{
  font-size:22px;
  font-weight:700;
  color:var(--star-gold);
  font-family:"Helvetica Neue",Arial,sans-serif;
  letter-spacing:-.02em;
}
.info-item .lbl{font-size:14px;color:var(--text-main);font-weight:600;margin-top:2px}
.info-item .desc{font-size:13px;color:var(--text-sub);line-height:1.7;margin:4px 0 0}

/* ---------- 主体两列 ---------- */
.cat-body{padding:var(--space-section) 0}
.body-grid{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:32px;align-items:start}
.qa-group{margin-bottom:44px}
.qa-group-head{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:8px;
  padding-bottom:12px;
  border-bottom:1px solid var(--line-strong);
}
.qa-group-head .idx{
  font-size:13px;
  color:var(--star-gold);
  letter-spacing:.08em;
  font-family:"Helvetica Neue",Arial,sans-serif;
}
.qa-group-head h2{font-size:22px;margin:0}
.qa-group-head .count{margin-left:auto;font-size:13px;color:var(--text-sub)}
.qa-item{border-bottom:1px solid var(--line)}
.qa-q{
  width:100%;
  background:transparent;
  border:0;
  text-align:left;
  padding:20px 0;
  display:flex;
  align-items:flex-start;
  gap:16px;
  cursor:pointer;
  color:var(--text-main);
  font-size:16px;
  font-weight:600;
  line-height:1.6;
  transition:color var(--dur) var(--ease);
}
.qa-q:hover{color:var(--star-gold)}
.qa-q .plus{
  margin-left:auto;
  flex:0 0 22px;
  color:var(--nebula-light);
  font-size:15px;
  transition:transform var(--dur) var(--ease),color var(--dur) var(--ease);
  line-height:1.6;
}
.qa-item.is-open .qa-q{color:var(--star-gold)}
.qa-item.is-open .plus{transform:rotate(180deg);color:var(--star-gold)}
.qa-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 260ms var(--ease);
}
.qa-a-inner{
  padding:0 34px 22px 0;
  color:var(--text-sub);
  font-size:15px;
  line-height:1.85;
}
.qa-a-inner p{margin-bottom:.7em;max-width:66ch}
.qa-a-inner ul{margin:8px 0 4px}
.qa-a-inner li{
  position:relative;
  padding-left:16px;
  color:var(--text-sub);
  font-size:15px;
  line-height:1.85;
}
.qa-a-inner li::before{
  content:"";
  position:absolute;
  left:0;top:13px;
  width:8px;height:2px;
  background:var(--star-gold);
}

/* ---------- 粘性联系卡 ---------- */
.sticky-col{position:sticky;top:100px;display:flex;flex-direction:column;gap:20px}
.contact-card{
  background:var(--bg-sub);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 24px;
  box-shadow:var(--shadow-env);
}
.contact-card h3{font-size:19px;margin-bottom:6px}
.contact-card .sub{font-size:13px;color:var(--text-sub);margin-bottom:18px}
.contact-card + .contact-card{margin-top:0}
.contact-list{margin:18px 0 0;border-top:1px solid var(--line);padding-top:16px}
.contact-list li{
  display:flex;
  gap:10px;
  font-size:13px;
  color:var(--text-sub);
  line-height:1.9;
}
.contact-list li i{color:var(--star-gold);margin-top:5px;font-size:12px}
.contact-list li b{color:var(--text-main);font-weight:600}
.mini-card{
  background:linear-gradient(160deg,rgba(110,90,168,.20),rgba(23,19,31,.9));
  border:1px solid rgba(155,138,209,.26);
  border-radius:var(--radius-card);
  padding:22px 24px;
}
.mini-card h4{font-size:15px;margin-bottom:8px;color:var(--star-gold)}
.mini-card p{font-size:13px;color:var(--text-sub);line-height:1.8;margin:0}
.mini-card .cover{
  border-radius:10px;
  overflow:hidden;
  margin-bottom:14px;
  border:1px solid var(--line);
}
.mini-card .cover img{width:100%;height:132px;object-fit:cover}

/* ---------- 服务承诺条 ---------- */
.promise{
  background:var(--bg-light);
  color:var(--text-dark);
  padding:78px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.promise h2{color:var(--text-dark);margin-bottom:10px}
.promise .section-sub{color:var(--text-dark-sub)}
.promise-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  margin-top:38px;
}
.promise-item{
  background:#fffdf8;
  border:1px solid rgba(26,21,38,.10);
  border-radius:var(--radius-card);
  padding:26px 24px;
}
.promise-item .ico{
  width:38px;height:38px;
  border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(227,176,75,.18);
  color:#8a6412;
  font-size:16px;
  margin-bottom:14px;
}
.promise-item h3{font-size:17px;color:var(--text-dark);margin-bottom:6px}
.promise-item p{font-size:14px;color:var(--text-dark-sub);line-height:1.8;margin:0}

/* ---------- CTA ---------- */
.cta-section{padding:110px 0}
.cta-box{
  background:var(--bg-sub);
  border:1px solid var(--line);
  border-radius:20px;
  padding:64px 44px;
  text-align:center;
  box-shadow:var(--shadow-env);
  position:relative;
  overflow:hidden;
}
.cta-box::before{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(227,176,75,.10) 1px,transparent 1px);
  background-size:26px 26px;
  opacity:.6;
  pointer-events:none;
}
.cta-box > *{position:relative}
.cta-box h2{margin-bottom:12px}
.cta-box p{color:var(--text-sub);margin:0 auto 30px;max-width:60ch}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#0B0913;
  border-top:1px solid var(--line);
  padding:72px 0 28px;
  font-size:14px;
  line-height:2;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:36px;
}
.footer-brand .brand{margin-bottom:14px;font-size:16px}
.footer-brand p{color:var(--text-sub);font-size:14px;line-height:2;margin:0 0 6px;max-width:38ch}
.footer-col h4{
  font-size:14px;
  color:var(--text-main);
  margin-bottom:14px;
  letter-spacing:.02em;
}
.footer-col a{
  display:block;
  color:var(--text-sub);
  font-size:14px;
  padding:3px 0;
}
.footer-col a:hover{color:var(--star-gold)}
.footer-bottom{
  margin-top:44px;
  padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  color:var(--text-sub);
  font-size:13px;
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  :root{--space-section:78px}
  .main-nav{display:none}
  .nav-toggle{display:inline-flex}
  .body-grid{grid-template-columns:1fr;gap:40px}
  .sticky-col{position:static}
  .info-strip-inner{grid-template-columns:repeat(2,1fr)}
  .info-item:nth-child(2){border-right:0}
  .info-item:nth-child(1),.info-item:nth-child(2){border-bottom:1px solid var(--line)}
  .promise-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .cat-hero{padding:84px 0 56px}
}
@media (max-width:640px){
  :root{--space-section:64px}
  .container{padding:0 20px}
  .cat-hero{margin-top:68px;padding:64px 0 44px}
  .header-inner{min-height:68px}
  .brand{font-size:16px}
  .info-strip{margin-top:0;padding-top:36px}
  .info-strip-inner{grid-template-columns:1fr;box-shadow:none}
  .info-item{border-right:0!important;border-bottom:1px solid var(--line)}
  .info-item:last-child{border-bottom:0}
  .promise-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-box{padding:44px 22px}
  .cta-actions .btn{width:100%}
  .footer-bottom{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
/* ============ 设计变量 ============ */
:root{
  --bg-deep:#0F0C1A;
  --bg-sub:#17131F;
  --bg-light:#F6F3EC;
  --star-gold:#E3B04B;
  --star-gold-deep:#C9982F;
  --nebula:#6E5AA8;
  --nebula-light:#9B8AD1;
  --text-main:#F4F1EA;
  --text-sub:#A79FB5;
  --text-dark:#1A1526;
  --text-dark-sub:#5C5470;
  --line-soft:rgba(255,255,255,.07);
  --line-strong:rgba(255,255,255,.16);
  --line-gold:rgba(227,176,75,.45);
  --r-card:14px;
  --r-tall:18px;
  --r-tag:6px;
  --r-input:10px;
  --r-pill:999px;
  --shadow-env:0 20px 48px rgba(0,0,0,.55);
  --dur:200ms;
  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1240px;
  --nav-h:72px;
}

/* ============ Reset / 基础 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background-color:var(--bg-deep);
  background-image:radial-gradient(rgba(244,241,234,.055) 1px, transparent 1px);
  background-size:36px 36px;
  color:var(--text-main);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:0;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease);}
a:hover{color:var(--star-gold);}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.02em;color:var(--text-main);}
h1{font-size:clamp(34px,4.2vw,56px);line-height:1.15;}
h2{font-size:clamp(24px,2.6vw,36px);line-height:1.25;}
h3{font-size:21px;line-height:1.4;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
::selection{background:rgba(227,176,75,.35);color:var(--text-main);}
:focus-visible{outline:2px solid var(--star-gold);outline-offset:3px;border-radius:4px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}
.section{padding:96px 0;position:relative;}
.section--tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.section-head h2{margin-bottom:16px;}
.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--star-gold);
  border:1px solid var(--line-gold);
  border-radius:var(--r-tag);
  padding:4px 10px;
  margin-bottom:18px;
}
.lead{color:var(--text-sub);font-size:16px;max-width:72ch;line-height:1.85;}
.muted{color:var(--text-sub);font-size:14px;}
.gold-line{width:64px;height:2px;background:var(--star-gold);border-radius:2px;margin:20px 0 0;}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),backdrop-filter var(--dur) var(--ease);
}
.site-header.is-scrolled{
  background:rgba(15,12,26,.93);
  border-bottom-color:var(--line-soft);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h);}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:16px;height:16px;flex:0 0 16px;border-radius:50%;
  background:radial-gradient(circle at 32% 30%,#FBEAC1 0%,var(--star-gold) 42%,var(--nebula) 100%);
  box-shadow:0 0 0 4px rgba(227,176,75,.10);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;color:var(--text-main);}
.brand:hover .brand-text{color:var(--star-gold);}
.main-nav{display:flex;align-items:center;gap:34px;}
.nav-link{
  position:relative;
  font-size:15px;font-weight:500;
  color:var(--text-sub);
  padding:6px 0;
  transition:color var(--dur) var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--star-gold);border-radius:2px;
  transition:width var(--dur) var(--ease);
}
.nav-link:hover{color:var(--text-main);}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--text-main);}
.nav-link.active::after{width:100%;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line-soft);
  background:rgba(23,19,31,.6);border-radius:10px;
  padding:0;position:relative;
}
.nav-toggle span{
  position:absolute;left:12px;right:12px;height:1.5px;background:var(--text-main);border-radius:2px;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease),top var(--dur) var(--ease);
}
.nav-toggle span:nth-child(1){top:15px;}
.nav-toggle span:nth-child(2){top:21px;}
.nav-toggle span:nth-child(3){top:27px;}
.nav-toggle.is-open span:nth-child(1){top:21px;transform:rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){top:21px;transform:rotate(-45deg);}

.nav-drawer{
  position:fixed;inset:0;z-index:55;
  background:rgba(15,12,26,.98);
  backdrop-filter:blur(10px);
  padding:96px 24px 40px;
  transform:translateY(-100%);
  opacity:0;visibility:hidden;
  transition:transform 260ms var(--ease),opacity 260ms var(--ease),visibility 260ms var(--ease);
  display:flex;flex-direction:column;gap:6px;
  overflow-y:auto;
}
.nav-drawer.is-open{transform:translateY(0);opacity:1;visibility:visible;}
.nav-drawer a.drawer-link{
  font-size:20px;font-weight:600;color:var(--text-main);
  padding:16px 4px;border-bottom:1px solid var(--line-soft);
}
.nav-drawer a.drawer-link.active{color:var(--star-gold);}
.drawer-foot{margin-top:auto;padding-top:28px;border-top:1px solid var(--line-soft);color:var(--text-sub);font-size:14px;line-height:2;}

/* ============ 按钮 / 标签 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--star-gold);color:#221A06;}
.btn-primary:hover{background:var(--star-gold-deep);color:#160F02;transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--text-main);border-color:rgba(244,241,234,.42);}
.btn-ghost:hover{background:var(--text-main);color:var(--text-dark);border-color:var(--text-main);}
.btn-text{
  display:inline-flex;align-items:center;gap:8px;color:var(--text-main);
  font-size:15px;font-weight:600;background:none;border:0;padding:0;
}
.btn-text i{transition:transform var(--dur) var(--ease);}
.btn-text:hover{color:var(--star-gold);}
.btn-text:hover i{transform:translateX(4px);}
.btn:active{transform:translateY(0);}
.btn-primary:active{background:var(--star-gold-deep);}

.tag{
  display:inline-flex;align-items:center;
  font-size:12px;letter-spacing:.04em;line-height:1;
  padding:6px 10px;border-radius:var(--r-tag);
  background:rgba(110,90,168,.20);
  color:var(--nebula-light);
  border:1px solid rgba(110,90,168,.42);
}
.tag--gold{background:rgba(227,176,75,.14);color:var(--star-gold);border-color:var(--line-gold);}
.tag--ghost{background:transparent;color:var(--text-sub);border-color:var(--line-strong);}

/* ============ 分类 Hero ============ */
.cat-hero{
  position:relative;
  padding:148px 0 76px;
  background-image:
    linear-gradient(180deg,rgba(15,12,26,.74) 0%,rgba(15,12,26,.90) 62%,var(--bg-deep) 100%),
    url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line-soft);
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-sub);margin-bottom:22px;}
.breadcrumb a{color:var(--text-sub);}
.breadcrumb a:hover{color:var(--star-gold);}
.breadcrumb .sep{opacity:.55;}
.breadcrumb .current{color:var(--text-sub);}
.cat-hero h1{max-width:20ch;}
.cat-hero .lead{margin-top:20px;max-width:62ch;color:var(--text-sub);}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:28px;margin-top:40px;padding-top:24px;border-top:1px solid var(--line-soft);}
.hero-meta div{font-size:14px;color:var(--text-sub);}
.hero-meta strong{display:block;color:var(--text-main);font-size:20px;font-weight:700;letter-spacing:-.01em;}

/* ============ 步骤导航条 ============ */
.step-nav{
  position:sticky;top:var(--nav-h);z-index:45;
  background:rgba(23,19,31,.95);
  border-bottom:1px solid var(--line-soft);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.step-nav-inner{display:flex;align-items:stretch;overflow-x:auto;scrollbar-width:none;}
.step-nav-inner::-webkit-scrollbar{display:none;}
.step-nav-item{
  position:relative;flex:1 0 auto;min-width:186px;
  padding:20px 24px 20px 0;
  display:flex;align-items:center;gap:12px;
}
.step-nav-item::after{
  content:"";position:absolute;right:14px;top:50%;width:26px;height:1px;background:var(--line-strong);
}
.step-nav-item:last-child::after{display:none;}
.step-nav-item .num{
  font-size:13px;font-weight:700;color:var(--star-gold);
  border:1px solid var(--line-gold);border-radius:var(--r-tag);
  padding:3px 7px;line-height:1;
}
.step-nav-item a{font-size:15px;font-weight:600;color:var(--text-sub);}
.step-nav-item a:hover{color:var(--star-gold);}

/* ============ 步骤区块 ============ */
.step-block{padding:84px 0;border-bottom:1px solid var(--line-soft);scroll-margin-top:160px;}
.step-block:last-of-type{border-bottom:0;}
.step-row{align-items:center;}
.step-row.reverse > .step-media{order:2;}
.step-row.reverse > .step-text{order:1;}
.step-media{display:flex;justify-content:center;}
.tall-shot{
  position:relative;width:100%;max-width:330px;
  aspect-ratio:9/16;
  border-radius:var(--r-tall);
  overflow:hidden;
  background:linear-gradient(160deg,#231B36,#120E1D);
  box-shadow:0 0 0 1px var(--line-soft),var(--shadow-env);
  transition:box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.tall-shot img{width:100%;height:100%;object-fit:cover;transition:transform 400ms var(--ease);}
.tall-shot::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(15,12,26,0) 42%,rgba(15,12,26,.78) 100%);
}
.tall-shot:hover{transform:translateY(-4px);box-shadow:0 0 0 1px var(--line-gold),var(--shadow-env);}
.tall-shot:hover img{transform:scale(1.03);}
.shot-caption{
  position:absolute;left:18px;right:18px;bottom:16px;z-index:2;
  font-size:13px;color:var(--text-main);line-height:1.6;
}
.shot-caption span{display:block;color:var(--star-gold);font-size:12px;letter-spacing:.08em;margin-bottom:4px;}
.step-text{padding:12px 0;}
.step-index{
  font-size:clamp(56px,7vw,92px);
  font-weight:800;line-height:1;
  letter-spacing:-.04em;
  color:transparent;
  -webkit-text-stroke:1px rgba(227,176,75,.55);
  display:block;margin-bottom:18px;
}
.step-text h2{margin-bottom:14px;}
.step-text > p{color:var(--text-sub);max-width:60ch;}
.mini-list{margin-top:26px;border-top:1px solid var(--line-soft);}
.mini-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 0;border-bottom:1px solid var(--line-soft);
  font-size:15px;color:var(--text-sub);
}
.mini-list li::before{
  content:"";flex:0 0 6px;width:6px;height:6px;margin-top:10px;border-radius:50%;
  background:var(--nebula-light);
}
.mini-list li strong{color:var(--text-main);font-weight:600;}

/* ============ 浅色反差区块 ============ */
.light-panel{
  background:var(--bg-light);
  color:var(--text-dark);
  padding:96px 0;
}
.light-panel h2,.light-panel h3{color:var(--text-dark);}
.light-panel .lead{color:var(--text-dark-sub);}
.light-panel .eyebrow{color:#8A6A1C;border-color:rgba(138,106,28,.35);}
.check-grid{margin-top:12px;}
.check-item{
  display:flex;gap:14px;align-items:flex-start;
  padding:22px 0;border-bottom:1px solid rgba(26,21,38,.12);
}
.check-item:last-child{border-bottom:0;}
.check-icon{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  background:rgba(227,176,75,.22);color:#7A5A12;
  display:flex;align-items:center;justify-content:center;font-size:12px;
  margin-top:4px;
}
.check-item h3{font-size:17px;margin-bottom:6px;}
.check-item p{color:var(--text-dark-sub);font-size:15px;margin:0;}
.light-note{
  margin-top:36px;padding:22px 24px;border-radius:var(--r-card);
  background:rgba(26,21,38,.05);border:1px solid rgba(26,21,38,.10);
  font-size:15px;color:var(--text-dark-sub);
}
.light-note strong{color:var(--text-dark);}

/* ============ 功能矩阵 ============ */
.matrix{border-top:1px solid var(--line-soft);margin-top:16px;}
.matrix-row{
  display:grid;
  grid-template-columns:200px 1fr 132px;
  gap:24px;align-items:center;
  padding:26px 0;border-bottom:1px solid var(--line-soft);
  transition:background var(--dur) var(--ease),padding-left var(--dur) var(--ease);
}
.matrix-row:hover{background:rgba(110,90,168,.07);padding-left:12px;}
.matrix-name{font-size:17px;font-weight:700;color:var(--text-main);}
.matrix-desc{font-size:15px;color:var(--text-sub);margin:0;}
.matrix-state{justify-self:start;}

/* ============ FAQ ============ */
.faq{border-top:1px solid var(--line-soft);max-width:900px;}
.faq-item{border-bottom:1px solid var(--line-soft);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  background:none;border:0;padding:24px 0;text-align:left;
  color:var(--text-main);font-size:17px;font-weight:600;line-height:1.5;
  transition:color var(--dur) var(--ease);
}
.faq-q:hover{color:var(--star-gold);}
.faq-icon{
  position:relative;flex:0 0 22px;width:22px;height:22px;
  border:1px solid var(--line-strong);border-radius:50%;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:6px;right:6px;top:10px;height:1.5px;background:var(--text-main);border-radius:2px;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease);
}
.faq-icon::after{transform:rotate(90deg);}
.faq-item.is-open .faq-icon{transform:rotate(180deg);border-color:var(--line-gold);background:rgba(227,176,75,.14);}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:var(--star-gold);}
.faq-item.is-open .faq-icon::after{transform:rotate(0deg);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height 280ms var(--ease);
}
.faq-a p{color:var(--text-sub);font-size:15px;padding:0 44px 24px 0;margin:0;}

/* ============ CTA 区 ============ */
.cta-block{
  padding:120px 0;
  text-align:center;
  background-image:radial-gradient(circle at 50% 0%,rgba(110,90,168,.20),transparent 62%);
  border-top:1px solid var(--line-soft);
}
.cta-block h2{max-width:22ch;margin:0 auto 18px;}
.cta-block .lead{margin:0 auto;max-width:60ch;}
.cta-note{
  margin:40px auto 0;max-width:760px;
  padding:20px 24px;border-radius:var(--r-card);
  border:1px solid var(--line-soft);background:rgba(23,19,31,.7);
  font-size:14px;color:var(--text-sub);text-align:left;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:36px;}

/* ============ 页脚 ============ */
.site-footer{
  background:#0B0913;
  border-top:1px solid var(--line-soft);
  padding:76px 0 32px;
  font-size:14px;
  line-height:2;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-brand p{color:var(--text-sub);margin:14px 0 0;max-width:38ch;font-size:14px;}
.footer-brand .brand{margin-bottom:6px;}
.footer-col h4{
  font-size:14px;font-weight:700;color:var(--text-main);
  letter-spacing:.06em;margin-bottom:12px;
}
.footer-col a{display:block;color:var(--text-sub);font-size:14px;padding:2px 0;}
.footer-col a:hover{color:var(--star-gold);}
.footer-bottom{
  margin-top:52px;padding-top:24px;border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  color:var(--text-sub);font-size:13px;
}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 500ms var(--ease),transform 500ms var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  .reveal{opacity:1;transform:none;}
  .tall-shot:hover{transform:none;}
  .tall-shot:hover img{transform:none;}
  .btn:hover{transform:none;}
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .container{padding:0 24px;}
  .section{padding:72px 0;}
  .cat-hero{padding:120px 0 60px;}
  .step-block{padding:64px 0;}
  .step-row.reverse > .step-media,
  .step-row.reverse > .step-text{order:0;}
  .step-media{margin-bottom:32px;}
  .tall-shot{max-width:290px;}
  .matrix-row{grid-template-columns:1fr;gap:10px;padding:22px 0;}
  .matrix-state{justify-self:start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .main-nav{display:none;}
  .nav-toggle{display:block;}
}
@media (max-width:639px){
  body{font-size:15.5px;}
  .container{padding:0 20px;}
  .section{padding:64px 0;}
  .cat-hero{padding:112px 0 52px;}
  .cat-hero h1{font-size:clamp(28px,8vw,36px);}
  .hero-actions .btn{width:100%;}
  .hero-meta{gap:20px;}
  .hero-meta strong{font-size:18px;}
  .step-nav-item{min-width:158px;padding:16px 18px 16px 0;}
  .step-index{font-size:56px;}
  .tall-shot{max-width:260px;}
  .light-panel{padding:64px 0;}
  .faq-q{font-size:16px;padding:20px 0;}
  .cta-block{padding:72px 0;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
}