/* roulang page: index */
:root{
  --brand:#6C3BF4;
  --brand-hover:#5A2BE0;
  --brand-active:#4B21C4;
  --brand-soft:#F1ECFF;
  --brand-12:rgba(108,59,244,.12);
  --accent:#00C9A7;
  --accent-12:rgba(0,201,167,.12);
  --amber:#FFB020;
  --amber-12:rgba(255,176,32,.14);
  --bg:#F6F5FB;
  --surface:#FFFFFF;
  --surface-2:#FBFAFE;
  --dark:#14121F;
  --dark-2:#1C1929;
  --text:#1B1A24;
  --text-2:#5C5870;
  --text-3:#8A8699;
  --border:#E7E4F2;
  --divider:#EFEDF7;
  --dark-text:#EDEBF7;
  --dark-text-2:rgba(237,235,247,.68);
  --radius-card:16px;
  --radius-lg:22px;
  --radius-btn:12px;
  --shadow-card:0 1px 2px rgba(20,18,31,.04), 0 8px 24px rgba(20,18,31,.06);
  --shadow-hover:0 12px 32px rgba(20,18,31,.10);
  --container:1200px;
  --bs-primary:#6C3BF4;
  --bs-primary-rgb:108,59,244;
  --bs-body-color:#1B1A24;
  --bs-body-bg:#F6F5FB;
  --bs-border-color:#E7E4F2;
  --bs-link-color:#5A2BE0;
  --bs-link-hover-color:#4B21C4;
  --bs-font-sans-serif:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--bs-font-sans-serif);
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  padding-bottom:78px;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:#5A2BE0;text-decoration:none;transition:color .18s ease-out;}
a:hover{color:#4B21C4;text-decoration:underline;text-underline-offset:3px;}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.3;color:var(--text);}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1040;
  background:#fff;
  border-bottom:1px solid var(--divider);
  transition:box-shadow .18s ease-out, background-color .18s ease-out;
}
.site-header.is-scrolled{
  box-shadow:0 6px 20px rgba(20,18,31,.07);
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(140%) blur(8px);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:68px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--text);
  font-weight:700;
  font-size:18px;
  letter-spacing:.2px;
}
.brand:hover{color:var(--text);text-decoration:none;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#6C3BF4 0%,#4B21C4 100%);
  color:#fff;font-size:16px;
  box-shadow:0 6px 16px rgba(108,59,244,.32);
}
.brand-text{
  background:linear-gradient(90deg,#6C3BF4 0%,#4B21C4 55%,#00C9A7 140%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
  white-space:nowrap;
}
.nav-desktop{
  display:none;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
.nav-desktop .nav-link{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  font-size:15px;
  font-weight:500;
  color:var(--text-2);
  border-radius:10px;
  white-space:nowrap;
}
.nav-desktop .nav-link:hover{
  color:var(--brand-hover);
  background:var(--surface-2);
  text-decoration:none;
}
.nav-desktop .nav-link.is-active{
  color:var(--brand);
  font-weight:600;
}
.nav-desktop .nav-link.is-active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;border-radius:2px;
  background:var(--brand);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
}
.nav-toggle{
  display:inline-flex;
  align-items:center;justify-content:center;
  width:42px;height:42px;
  border:1px solid var(--border);
  border-radius:12px;
  background:#fff;
  color:var(--text);
  font-size:17px;
}
.nav-toggle:active{background:var(--brand-12);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:var(--radius-btn);
  font-weight:600;
  font-size:15px;
  line-height:1;
  padding:13px 22px;
  border:1px solid transparent;
  transition:transform .18s ease-out, background-color .18s ease-out, box-shadow .18s ease-out, color .18s ease-out, border-color .18s ease-out;
  cursor:pointer;
}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn:active{transform:translateY(0);}
.btn-brand{
  background:var(--brand);
  color:#fff;
  box-shadow:0 8px 20px rgba(108,59,244,.26);
}
.btn-brand:hover{background:var(--brand-hover);color:#fff;box-shadow:0 12px 26px rgba(108,59,244,.32);}
.btn-brand:active{background:var(--brand-active);color:#fff;}
.btn-outline-brand{
  background:var(--brand-soft);
  border-color:#DCD2FF;
  color:var(--brand-hover);
}
.btn-outline-brand:hover{background:#E7DEFF;border-color:#CDBEFF;color:var(--brand-active);}
.btn-ghost{
  background:#fff;
  border-color:var(--border);
  color:var(--text);
}
.btn-ghost:hover{background:var(--surface-2);border-color:#DCD6F0;color:var(--text);}
.btn-mint{
  background:var(--accent);
  color:#0B2B25;
  box-shadow:0 10px 24px rgba(0,201,167,.28);
}
.btn-mint:hover{background:#00B798;color:#0B2B25;}
.btn-sm{padding:10px 16px;font-size:14px;}
.btn-lg{padding:15px 28px;font-size:16px;}
.btn-block{width:100%;}

/* ============ 徽章 / 标签 ============ */
.badge-soft{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  line-height:1.5;
}
.badge-purple{background:var(--brand-12);color:#5326D6;}
.badge-mint{background:var(--accent-12);color:#00806B;}
.badge-amber{background:var(--amber-12);color:#9A6200;}
.badge-plain{background:#F1F0F8;color:var(--text-2);}

/* ============ 通用板块 ============ */
.section{padding:88px 0;}
.section-sm{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head.is-center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--brand);
  text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";width:22px;height:2px;border-radius:2px;background:var(--brand);
}
.section-title{font-size:31px;margin-bottom:16px;letter-spacing:-.2px;}
.section-desc{font-size:16.5px;line-height:1.85;color:var(--text-2);max-width:720px;}
.is-center .section-desc{margin-left:auto;margin-right:auto;}

/* ============ Hero ============ */
.hero{
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(900px 460px at 12% -10%, rgba(108,59,244,.14), transparent 62%),
    radial-gradient(700px 420px at 92% 6%, rgba(0,201,167,.12), transparent 60%),
    var(--bg);
  padding:64px 0 72px;
}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  opacity:.16;
  pointer-events:none;
}
.hero-inner{position:relative;display:grid;gap:44px;}
.hero-copy{max-width:640px;}
.hero h1{
  font-size:30px;
  line-height:1.32;
  letter-spacing:-.4px;
  margin-bottom:18px;
}
.hero h1 .hl{
  color:var(--brand);
  position:relative;
  white-space:nowrap;
}
.hero-sub{
  font-size:17px;
  color:var(--text-2);
  line-height:1.8;
  max-width:560px;
  margin-bottom:26px;
}
.hero-points{
  display:flex;
  flex-wrap:wrap;
  gap:10px 18px;
  margin-bottom:30px;
}
.hero-point{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--text-2);
  font-weight:500;
}
.hero-point i{color:var(--brand);font-size:14px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px;}
.hero-note{
  font-size:14px;
  color:var(--text-3);
  display:flex;align-items:center;gap:8px;
}
.hero-note i{color:var(--accent);}

.hero-visual{
  position:relative;
}
.device-frame{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  background:#fff;
  border:1px solid var(--border);
  box-shadow:0 22px 50px rgba(20,18,31,.14), inset 0 0 0 1px rgba(255,255,255,.6);
}
.device-frame img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
}
.device-frame::after{
  content:"";
  position:absolute;inset:0;
  box-shadow:inset 0 -60px 70px -40px rgba(20,18,31,.28);
  pointer-events:none;
}
.hero-float{
  position:absolute;
  right:16px;bottom:-18px;
  background:#fff;
  border:1px solid var(--border);
  border-radius:14px;
  box-shadow:var(--shadow-card);
  padding:12px 16px;
  display:flex;align-items:center;gap:10px;
  font-size:13px;
  color:var(--text-2);
}
.hero-float strong{color:var(--text);font-size:15px;}
.dot-live{
  width:9px;height:9px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 0 4px rgba(0,201,167,.18);
  animation:pulse 2.4s infinite;
}
@keyframes pulse{
  0%,100%{box-shadow:0 0 0 4px rgba(0,201,167,.18);}
  50%{box-shadow:0 0 0 8px rgba(0,201,167,.06);}
}

/* ============ 信任条 ============ */
.trust-strip{
  background:var(--surface-2);
  border-top:1px solid var(--divider);
  border-bottom:1px solid var(--divider);
  padding:26px 0;
}
.trust-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px 16px;
}
.trust-item{
  display:flex;
  align-items:center;
  gap:12px;
}
.trust-icon{
  flex:0 0 auto;
  width:40px;height:40px;
  border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:#fff;
  border:1px solid var(--border);
  color:var(--brand);
  font-size:16px;
}
.trust-item strong{
  display:block;
  font-size:14.5px;
  font-weight:600;
  color:var(--text);
  line-height:1.5;
}
.trust-item span{
  display:block;
  font-size:13px;
  color:var(--text-3);
  line-height:1.5;
}

/* ============ 功能亮点（非对称交错） ============ */
.feature-row{
  display:grid;
  gap:24px;
  margin-bottom:24px;
}
.feature-main,
.feature-side{
  background:#fff;
  border:1px solid var(--divider);
  border-radius:var(--radius-card);
  padding:26px;
  box-shadow:var(--shadow-card);
  transition:transform .18s ease-out, box-shadow .18s ease-out;
}
.feature-main:hover,
.feature-side:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.feature-main.wide{grid-column:span 1;}
.feature-icon{
  width:46px;height:46px;
  border-radius:14px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:19px;
  background:var(--brand-12);
  color:var(--brand);
  margin-bottom:16px;
}
.feature-icon.mint{background:var(--accent-12);color:#00806B;}
.feature-icon.amber{background:var(--amber-12);color:#9A6200;}
.feature-main h3{font-size:22px;margin-bottom:10px;}
.feature-side h3{font-size:19px;margin-bottom:10px;}
.feature-p{font-size:15.5px;color:var(--text-2);line-height:1.85;margin-bottom:16px;}
.feature-list li{
  position:relative;
  padding-left:22px;
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.75;
  margin-bottom:8px;
}
.feature-list li:last-child{margin-bottom:0;}
.feature-list li::before{
  content:"";
  position:absolute;
  left:0;top:.62em;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--brand);
  box-shadow:0 0 0 3px rgba(108,59,244,.12);
}
.feature-list.mint li::before{background:var(--accent);box-shadow:0 0 0 3px rgba(0,201,167,.14);}

/* ============ 截图轮播 ============ */
.slider-section{background:var(--surface-2);border-top:1px solid var(--divider);border-bottom:1px solid var(--divider);}
.carousel-inner{border-radius:var(--radius-lg);}
.slide-card{
  border-radius:var(--radius-lg);
  overflow:hidden;
  background:#fff;
  border:1px solid var(--border);
  box-shadow:var(--shadow-card);
}
.slide-card img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
}
.slide-caption{
  padding:16px 20px;
  font-size:14.5px;
  color:var(--text-2);
  display:flex;
  align-items:center;
  gap:10px;
  border-top:1px solid var(--divider);
}
.slide-caption i{color:var(--brand);}
.carousel-control-prev,
.carousel-control-next{
  width:46px;height:46px;
  top:50%;
  transform:translateY(-50%);
  border-radius:50%;
  background:#fff;
  border:1px solid var(--border);
  box-shadow:0 8px 22px rgba(20,18,31,.10);
  opacity:1;
  color:var(--brand);
  display:flex;align-items:center;justify-content:center;
}
.carousel-control-prev{left:-6px;}
.carousel-control-next{right:-6px;}
.carousel-control-prev:hover,
.carousel-control-next:hover{background:var(--brand-soft);color:var(--brand-hover);}
.carousel-control-prev i,
.carousel-control-next i{font-size:16px;}
.carousel-indicators{
  position:static;
  margin:26px 0 0;
  gap:8px;
}
.carousel-indicators [data-bs-target]{
  width:18px;height:4px;
  border-radius:999px;
  background:#D6D1E8;
  border:0;
  opacity:1;
  margin:0;
  transition:width .18s ease-out, background-color .18s ease-out;
}
.carousel-indicators .active{
  width:34px;
  background:var(--brand);
}

/* ============ 系统要求 ============ */
.spec-card{
  background:#fff;
  border:1px solid var(--divider);
  border-radius:var(--radius-lg);
  padding:8px 26px;
  box-shadow:var(--shadow-card);
}
.spec-grid{
  display:grid;
  grid-template-columns:1fr;
}
.spec-row{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:6px 16px;
  padding:20px 0;
  border-bottom:1px solid var(--divider);
}
.spec-row:last-child{border-bottom:0;}
.spec-row dt{
  flex:0 0 120px;
  font-size:14px;
  font-weight:600;
  color:var(--text-3);
  letter-spacing:.02em;
}
.spec-row dd{
  margin:0;
  flex:1 1 220px;
  font-size:15.5px;
  color:var(--text);
  line-height:1.7;
}
.spec-row dd small{
  display:block;
  font-size:13.5px;
  color:var(--text-3);
  margin-top:4px;
}

/* ============ 评价墙 ============ */
.review-wall{
  display:grid;
  gap:20px;
}
.review-card{
  background:#fff;
  border:1px solid var(--divider);
  border-radius:var(--radius-card);
  padding:22px;
  box-shadow:var(--shadow-card);
  transition:transform .18s ease-out, box-shadow .18s ease-out;
}
.review-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.review-top{
  display:flex;align-items:center;gap:12px;
  margin-bottom:14px;
}
.avatar{
  width:44px;height:44px;
  flex:0 0 auto;
  border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:700;
  font-size:16px;
  color:#fff;
  background:linear-gradient(135deg,#6C3BF4,#4B21C4);
}
.avatar.mint{background:linear-gradient(135deg,#00C9A7,#009C81);}
.avatar.amber{background:linear-gradient(135deg,#FFB020,#E08600);}
.review-name{font-size:15px;font-weight:600;line-height:1.4;}
.review-meta{font-size:13px;color:var(--text-3);line-height:1.5;}
.stars{color:var(--amber);font-size:13px;letter-spacing:1px;margin-bottom:10px;}
.review-text{font-size:15px;color:var(--text-2);line-height:1.85;margin-bottom:14px;}
.review-tag{
  display:inline-block;
  font-size:12.5px;
  color:var(--text-3);
  background:var(--surface-2);
  border:1px solid var(--divider);
  border-radius:999px;
  padding:4px 10px;
}

/* ============ 下载区 ============ */
.download-band{
  position:relative;
  overflow:hidden;
  background:linear-gradient(135deg,#6C3BF4 0%,#4B21C4 52%,#2C1466 100%);
  color:var(--dark-text);
}
.download-band::before{
  content:"";
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.14;
  pointer-events:none;
}
.download-inner{
  position:relative;
  display:grid;
  gap:34px;
}
.download-band h2{color:#fff;font-size:30px;margin-bottom:14px;}
.download-band p{color:var(--dark-text-2);font-size:16px;max-width:520px;margin-bottom:0;}
.dl-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:12px;
}
.dl-btn{
  display:flex;
  align-items:center;
  gap:12px;
  padding:14px 16px;
  border-radius:14px;
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.20);
  color:#fff;
  font-size:14.5px;
  font-weight:600;
  transition:background-color .18s ease-out, transform .18s ease-out, border-color .18s ease-out;
}
.dl-btn:hover{
  background:rgba(255,255,255,.18);
  border-color:rgba(255,255,255,.34);
  color:#fff;
  text-decoration:none;
  transform:translateY(-1px);
}
.dl-btn i{font-size:19px;}
.dl-btn.is-primary{
  background:var(--accent);
  border-color:var(--accent);
  color:#06302A;
}
.dl-btn.is-primary:hover{background:#00B798;border-color:#00B798;color:#06302A;}
.dl-btn small{
  display:block;
  font-size:12px;
  font-weight:400;
  opacity:.72;
  line-height:1.5;
}
.qr-card{
  grid-column:span 2;
  display:flex;
  align-items:center;
  gap:16px;
  background:#fff;
  border-radius:var(--radius-card);
  padding:14px 16px;
  color:var(--text);
}
.qr-box{
  width:132px;height:132px;
  flex:0 0 auto;
  border-radius:12px;
  border:1px solid var(--border);
  background:
    repeating-conic-gradient(#14121F 0% 25%, #ffffff 0% 50%) 50% / 12px 12px;
  display:flex;align-items:center;justify-content:center;
  position:relative;
  overflow:hidden;
}
.qr-box img{
  position:absolute;inset:0;
  width:100%;height:100%;
  object-fit:cover;
}
.qr-text strong{display:block;font-size:15px;margin-bottom:4px;}
.qr-text span{font-size:13px;color:var(--text-3);line-height:1.6;display:block;}

/* ============ 最新信息（CMS 区） ============ */
.news-section{background:var(--bg);}
.news-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:38px;
}
.news-more{
  font-size:14.5px;
  font-weight:600;
  color:var(--brand-hover);
  display:inline-flex;align-items:center;gap:6px;
}
.news-card{
  height:100%;
  background:#fff;
  border:1px solid var(--divider);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .18s ease-out, box-shadow .18s ease-out;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.news-link{display:flex;flex-direction:column;height:100%;color:inherit;}
.news-link:hover{text-decoration:none;color:inherit;}
.news-media{
  position:relative;
  background:linear-gradient(135deg,rgba(108,59,244,.12),rgba(0,201,167,.12));
}
.news-media img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
}
.news-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1 1 auto;}
.news-title{
  font-size:17px;
  line-height:1.55;
  margin:12px 0 8px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  transition:color .18s ease-out;
}
.news-card:hover .news-title{color:var(--brand);}
.news-excerpt{
  font-size:14.5px;
  color:var(--text-3);
  line-height:1.75;
  margin-bottom:14px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-foot{
  margin-top:auto;
  padding-top:12px;
  border-top:1px solid var(--divider);
  font-size:13.5px;
  color:var(--text-3);
  display:flex;align-items:center;gap:8px;
}
.news-foot i{color:var(--text-3);font-size:13px;}
.empty-state{
  text-align:center;
  padding:56px 24px;
  background:#fff;
  border:1px dashed #D9D3EE;
  border-radius:var(--radius-lg);
}
.empty-state .empty-icon{
  width:62px;height:62px;
  margin:0 auto 16px;
  border-radius:18px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-12);
  color:var(--brand);
  font-size:24px;
}
.empty-state p{font-size:15px;color:var(--text-2);margin-bottom:18px;}

/* ============ FAQ ============ */
.faq-section{background:var(--surface-2);border-top:1px solid var(--divider);}
.accordion-custom .accordion-item{
  background:#fff;
  border:1px solid var(--divider);
  border-radius:var(--radius-card);
  margin-bottom:12px;
  overflow:hidden;
  box-shadow:0 1px 2px rgba(20,18,31,.03);
  transition:box-shadow .18s ease-out;
}
.accordion-custom .accordion-item:last-child{margin-bottom:0;}
.accordion-custom .accordion-button{
  background:#fff;
  color:var(--text);
  font-size:16px;
  font-weight:600;
  line-height:1.6;
  padding:18px 52px 18px 20px;
  border:0;
  box-shadow:none;
  position:relative;
}
.accordion-custom .accordion-button::after{display:none;}
.accordion-custom .accordion-button .chev{
  position:absolute;
  right:18px;top:50%;
  transform:translateY(-50%);
  width:26px;height:26px;
  border-radius:50%;
  background:var(--surface-2);
  color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:12px;
  transition:transform .18s ease-out, background-color .18s ease-out;
}
.accordion-custom .accordion-button:not(.collapsed){
  color:var(--brand-hover);
  background:#FCFBFF;
  box-shadow:inset 3px 0 0 var(--brand);
}
.accordion-custom .accordion-button:not(.collapsed) .chev{
  transform:translateY(-50%) rotate(180deg);
  background:var(--brand-12);
}
.accordion-custom .accordion-button:focus{box-shadow:inset 3px 0 0 var(--brand);}
.accordion-custom .accordion-body{
  padding:4px 22px 22px 23px;
  font-size:15.5px;
  line-height:1.9;
  color:var(--text-2);
  border-top:1px solid var(--divider);
  margin-top:0;
  padding-top:18px;
}

/* ============ 底部 CTA ============ */
.bottom-cta{
  background:var(--dark);
  color:var(--dark-text);
  position:relative;
  overflow:hidden;
}
.bottom-cta::before{
  content:"";
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center bottom;
  opacity:.12;
  pointer-events:none;
}
.bottom-inner{
  position:relative;
  display:grid;
  gap:26px;
  align-items:center;
  padding:72px 0;
}
.bottom-cta h2{color:#fff;font-size:28px;margin-bottom:12px;}
.bottom-cta p{color:var(--dark-text-2);font-size:15.5px;margin-bottom:0;max-width:520px;}
.bottom-note{font-size:13.5px;color:rgba(237,235,247,.55);}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--dark);
  color:var(--dark-text-2);
  padding:56px 0 0;
  border-top:1px solid rgba(255,255,255,.07);
}
.footer-grid{
  display:grid;
  gap:34px;
  padding-bottom:40px;
}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;
  color:#fff;font-weight:700;font-size:17px;margin-bottom:14px;
}
.footer-brand:hover{color:#fff;text-decoration:none;}
.footer-brand .brand-mark{box-shadow:none;}
.footer-desc{font-size:14.5px;line-height:1.85;max-width:320px;margin-bottom:16px;}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;}
.footer-tags span{
  font-size:12.5px;
  padding:4px 10px;
  border-radius:999px;
  background:rgba(255,255,255,.07);
  color:rgba(237,235,247,.75);
}
.footer-col h4{
  color:#fff;
  font-size:15px;
  margin-bottom:16px;
  font-weight:600;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul li a{
  font-size:14.5px;
  color:var(--dark-text-2);
}
.footer-col ul li a:hover{color:#fff;text-decoration:none;}
.footer-col ul li .muted{font-size:14.5px;color:rgba(237,235,247,.5);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:20px 0 26px;
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
  justify-content:space-between;
  font-size:13.5px;
  color:rgba(237,235,247,.55);
}
.footer-bottom a{color:rgba(237,235,247,.7);}
.footer-bottom a:hover{color:#fff;text-decoration:none;}

/* ============ 移动底部 Tab ============ */
.mobile-tabbar{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:1050;
  display:flex;
  align-items:stretch;
  height:58px;
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(255,255,255,.98);
  border-top:1px solid var(--divider);
  box-shadow:0 -6px 20px rgba(20,18,31,.06);
}
.tab-item{
  flex:1 1 0;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  font-size:11.5px;
  font-weight:500;
  color:var(--text-3);
  border-radius:0;
  transition:color .18s ease-out, background-color .18s ease-out;
}
.tab-item:hover{text-decoration:none;color:var(--brand-hover);}
.tab-item i{font-size:17px;}
.tab-item.is-active{color:var(--brand);font-weight:700;}
.tab-item:active{background:rgba(108,59,244,.12);}

/* ============ Offcanvas ============ */
.offcanvas-drawer{
  background:#fff;
  width:min(86vw,360px);
}
.offcanvas-drawer .offcanvas-header{
  border-bottom:1px solid var(--divider);
  padding:18px 20px;
}
.offcanvas-drawer .offcanvas-body{padding:16px 20px 24px;}
.drawer-nav a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 14px;
  border-radius:12px;
  font-size:15.5px;
  font-weight:500;
  color:var(--text-2);
  margin-bottom:6px;
}
.drawer-nav a:hover{background:var(--surface-2);color:var(--brand-hover);text-decoration:none;}
.drawer-nav a.is-active{background:var(--brand-12);color:var(--brand);font-weight:600;}
.drawer-nav a i{font-size:13px;color:var(--text-3);}
.drawer-foot{margin-top:18px;padding-top:18px;border-top:1px solid var(--divider);}

/* ============ 响应式 ============ */
@media (min-width:576px){
  .trust-grid{grid-template-columns:repeat(4,minmax(0,1fr));}
  .hero h1{font-size:34px;}
  .review-wall{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:768px){
  body{padding-bottom:0;}
  .section{padding:96px 0;}
  .hero{padding:78px 0 88px;}
  .hero h1{font-size:38px;}
  .section-title{font-size:32px;}
  .feature-row{grid-template-columns:repeat(12,minmax(0,1fr));}
  .feature-main{grid-column:span 7;}
  .feature-side{grid-column:span 5;}
  .feature-row.flip .feature-main{grid-column:span 5;order:2;}
  .feature-row.flip .feature-side{grid-column:span 7;order:1;}
  .spec-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .spec-row{border-bottom:1px solid var(--divider);}
  .spec-row:nth-last-child(-n+2){border-bottom:0;}
  .download-inner{grid-template-columns:1fr 1fr;align-items:center;}
  .dl-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .qr-card{grid-column:span 2;}
  .review-wall{grid-template-columns:repeat(3,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;}
  .bottom-inner{grid-template-columns:1.6fr 1fr;padding:80px 0;}
}
@media (min-width:992px){
  .mobile-tabbar{display:none;}
  body{padding-bottom:0;}
  .nav-desktop{display:flex;}
  .nav-toggle{display:none;}
  .hero-inner{grid-template-columns:1.05fr 1fr;align-items:center;gap:56px;}
  .hero h1{font-size:42px;}
  .hero-visual{padding-left:8px;}
  .container{padding-left:24px;padding-right:24px;}
}
@media (min-width:1200px){
  .hero h1{font-size:44px;}
  .section-title{font-size:33px;}
}
@media (max-width:767.98px){
  .carousel-control-prev{left:-2px;}
  .carousel-control-next{right:-2px;}
  .review-wall{
    display:grid;
    grid-auto-flow:column;
    grid-auto-columns:82%;
    overflow-x:auto;
    scroll-snap-type:x mandatory;
    padding-bottom:8px;
    margin:0 -16px;
    padding-left:16px;
    padding-right:16px;
  }
  .review-card{scroll-snap-align:start;}
  .hero-float{position:static;margin-top:14px;right:auto;bottom:auto;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  .btn:hover,.news-card:hover,.review-card:hover,.feature-main:hover,.feature-side:hover{transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --brand:#6C3BF4;
  --brand-hover:#5A2BE0;
  --brand-active:#4B21C4;
  --brand-soft:#F1ECFF;
  --brand-12:rgba(108,59,244,.12);
  --mint:#00C9A7;
  --mint-soft:rgba(0,201,167,.12);
  --amber:#FFB020;
  --amber-soft:rgba(255,176,32,.14);
  --bg:#F6F5FB;
  --surface:#FFFFFF;
  --surface-2:#FBFAFE;
  --dark:#14121F;
  --dark-2:#1C1930;
  --dark-text:#EDEBF7;
  --dark-muted:rgba(237,235,247,.68);
  --text:#1B1A24;
  --text-2:#5C5870;
  --text-3:#8A8699;
  --border:#E7E4F2;
  --divider:#EFEDF7;
  --danger:#E5484D;
  --r-card:16px;
  --r-lg:22px;
  --r-btn:12px;
  --shadow-card:0 1px 2px rgba(20,18,31,.04),0 8px 24px rgba(20,18,31,.06);
  --shadow-hover:0 12px 32px rgba(20,18,31,.10);
  --shadow-nav:0 4px 18px rgba(20,18,31,.07);
  --ease:180ms ease-out;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  padding-bottom:78px;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand-hover);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--brand-active);text-decoration:underline;text-underline-offset:3px}
button{font:inherit}
h1,h2,h3,h4,h5{color:var(--text);font-weight:700;line-height:1.3;margin:0}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
@media (max-width:575.98px){.container{padding-left:16px;padding-right:16px}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--divider);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-nav);background:rgba(255,255,255,.94)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700}
.brand:hover{text-decoration:none;color:var(--text)}
.brand-mark{
  width:36px;height:36px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand) 0%,#8A5CFF 100%);
  color:#fff;font-size:17px;
  box-shadow:0 6px 16px rgba(108,59,244,.28);
}
.brand-text{font-size:18px;letter-spacing:.2px;white-space:nowrap}
.nav-desktop{display:none;align-items:center;gap:6px}
.nav-link{
  position:relative;display:inline-block;padding:8px 12px;border-radius:10px;
  font-size:15px;color:var(--text-2);font-weight:500;transition:color var(--ease),background var(--ease);
}
.nav-link:hover{color:var(--brand-hover);background:var(--brand-soft);text-decoration:none}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;border-radius:2px;background:var(--brand);
}
.header-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{
  width:42px;height:42px;border-radius:12px;border:1px solid var(--border);background:#fff;color:var(--text);
  display:inline-flex;align-items:center;justify-content:center;font-size:18px;cursor:pointer;
  transition:background var(--ease),border-color var(--ease),color var(--ease);
}
.nav-toggle:hover{background:var(--brand-soft);border-color:#DDD3FA;color:var(--brand-hover)}
@media (min-width:992px){
  .nav-desktop{display:flex}
  .nav-toggle{display:none}
}

/* ---------- 抽屉 ---------- */
.drawer{width:min(320px,86vw);background:#fff}
.drawer .offcanvas-header{border-bottom:1px solid var(--divider);padding:18px 20px}
.drawer .offcanvas-body{padding:16px 20px 28px;display:flex;flex-direction:column;gap:8px}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:12px}
.drawer-link{
  display:block;padding:12px 14px;border-radius:12px;color:var(--text-2);font-size:15px;font-weight:500;
  border:1px solid transparent;transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.drawer-link:hover{background:var(--brand-soft);color:var(--brand-hover);text-decoration:none;border-color:#E4DAFB}
.drawer-link.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600;border-color:#E4DAFB}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);font-weight:600;font-size:15px;
  padding:11px 20px;border:1px solid transparent;cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
  text-decoration:none;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-brand{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(108,59,244,.24)}
.btn-brand:hover{background:var(--brand-hover);color:#fff;box-shadow:0 12px 26px rgba(108,59,244,.30)}
.btn-brand:active{background:var(--brand-active)}
.btn-outline-brand{background:var(--brand-soft);color:var(--brand-hover);border-color:#DED2FA}
.btn-outline-brand:hover{background:#E9E0FF;color:var(--brand-active);border-color:#CDBBF7}
.btn-mint{background:var(--mint);color:#08201B;box-shadow:0 8px 20px rgba(0,201,167,.24)}
.btn-mint:hover{background:#00B99A;color:#08201B}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.34)}
.btn-ghost-light:hover{background:rgba(255,255,255,.10);color:#fff;border-color:rgba(255,255,255,.55)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-lg{padding:14px 26px;font-size:16px}

/* ---------- 徽章 ---------- */
.badge-pill{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;
  padding:4px 12px;border-radius:999px;line-height:1.6;
}
.badge-brand{background:var(--brand-12);color:var(--brand-hover)}
.badge-mint{background:var(--mint-soft);color:#00806B}
.badge-amber{background:var(--amber-soft);color:#9A6200}

/* ---------- 面包屑 ---------- */
.breadcrumb-bar{background:var(--surface-2);border-bottom:1px solid var(--divider)}
.breadcrumb-list{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:14px;color:var(--text-3);padding:14px 0}
.breadcrumb-list a{color:var(--text-2)}
.breadcrumb-list a:hover{color:var(--brand-hover)}
.breadcrumb-sep{color:#C6C1D8}
.breadcrumb-current{color:var(--brand);font-weight:600;max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章区 ---------- */
.article-wrap{padding:44px 0 88px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:48px;align-items:start}
@media (min-width:992px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px}
}
.article-shell{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-card);padding:32px 28px 40px}
@media (min-width:768px){.article-shell{padding:44px 48px 56px}}
.article-head{border-bottom:1px solid var(--divider);padding-bottom:22px;margin-bottom:32px}
.article-title{font-size:26px;margin:14px 0 16px;letter-spacing:.2px}
@media (min-width:768px){.article-title{font-size:36px}}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:14px;color:var(--text-3)}
.article-meta span{display:inline-flex;align-items:center;gap:7px}
.article-meta i{color:var(--brand);font-size:13px}

.article-body{max-width:760px;font-size:17px;line-height:1.9;color:var(--text)}
.article-body p{margin:0 0 1.1em}
.article-body h2{
  position:relative;font-size:24px;margin:2em 0 .6em;padding-left:16px;line-height:1.35;
}
@media (min-width:768px){.article-body h2{font-size:30px}}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:3px;border-radius:3px;background:var(--brand);
}
.article-body h3{font-size:22px;margin:1.7em 0 .5em}
.article-body h4{font-size:18px;margin:1.4em 0 .5em;color:var(--text-2)}
.article-body ul{margin:0 0 1.1em;padding-left:4px}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.5em;line-height:1.7}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--brand);
}
.article-body ol{margin:0 0 1.1em;padding-left:22px;list-style:decimal}
.article-body ol li{margin-bottom:.5em;line-height:1.7}
.article-body blockquote{
  margin:1.4em 0;padding:18px 20px;border-left:3px solid var(--brand);border-radius:0 12px 12px 0;
  background:var(--brand-12);color:var(--text-2);font-style:normal;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body code{
  background:#F2F0F8;border-radius:6px;padding:2px 7px;font-size:.92em;color:#4B21C4;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body pre{
  background:#1B1A24;color:#EDEBF7;border-radius:14px;padding:18px 20px;overflow-x:auto;
  font-size:14px;line-height:1.7;
}
.article-body pre code{background:transparent;color:inherit;padding:0}
.article-body img{border-radius:14px;margin:1.4em 0;box-shadow:var(--shadow-card)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15px;display:block;overflow-x:auto}
.article-body table thead th{background:#F4F0FF;color:var(--text);font-weight:600;text-align:left;padding:12px 14px;white-space:nowrap}
.article-body table td{padding:12px 14px;border-top:1px solid var(--divider);color:var(--text-2)}
.article-body a{font-weight:600}
.article-body hr{border:0;border-top:1px solid var(--divider);margin:2.2em 0}

/* ---------- 侧栏 ---------- */
.article-side{display:flex;flex-direction:column;gap:20px}
@media (min-width:992px){.article-side{position:sticky;top:92px}}
.side-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-card);padding:22px}
.side-card h3{font-size:16px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3 i{color:var(--brand);font-size:14px}
.side-list li+li{margin-top:10px;padding-top:10px;border-top:1px solid var(--divider)}
.side-list a{font-size:15px;color:var(--text-2);font-weight:500;display:block;line-height:1.6}
.side-list a:hover{color:var(--brand-hover)}
.side-download{background:linear-gradient(135deg,#6C3BF4 0%,#3F1CA8 100%);color:#fff;border:0}
.side-download h3{color:#fff}
.side-download p{font-size:14px;color:rgba(255,255,255,.78);margin:0 0 16px;line-height:1.7}

/* ---------- 空态 ---------- */
.empty-state{text-align:center;padding:56px 20px}
.empty-icon{
  width:76px;height:76px;margin:0 auto 20px;border-radius:20px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(108,59,244,.12),rgba(0,201,167,.12));color:var(--brand);font-size:28px;
}
.empty-state h2{font-size:22px;margin-bottom:10px}
.empty-state p{color:var(--text-2);margin-bottom:22px}

/* ---------- 文末模块 ---------- */
.end-block{margin-top:48px;padding-top:36px;border-top:1px solid var(--divider)}
.end-block h2{font-size:22px;margin-bottom:20px;display:flex;align-items:center;gap:10px}
.end-block h2 i{color:var(--brand);font-size:16px}
.related-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:768px){.related-grid{grid-template-columns:repeat(3,1fr)}}
.news-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--shadow-card);display:flex;flex-direction:column;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#DDD3FA}
.news-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,rgba(108,59,244,.12),rgba(0,201,167,.12))}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-body h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card:hover .news-body h3{color:var(--brand)}
.news-desc{font-size:14px;color:var(--text-3);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-foot{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);margin-top:auto}

.end-actions{display:flex;flex-direction:column;gap:14px;margin-top:32px}
@media (min-width:640px){.end-actions{flex-direction:row;align-items:center;justify-content:space-between}}
.prev-next{display:grid;grid-template-columns:1fr;gap:12px}
@media (min-width:640px){.prev-next{grid-template-columns:1fr 1fr}}
.prev-next a{
  display:flex;align-items:center;gap:10px;padding:14px 18px;border:1px solid var(--border);border-radius:var(--r-btn);
  background:var(--surface);color:var(--text-2);font-size:15px;font-weight:500;
  transition:border-color var(--ease),background var(--ease),color var(--ease);
}
.prev-next a:hover{border-color:#DED2FA;background:var(--brand-soft);color:var(--brand-hover);text-decoration:none}
.prev-next .next-link{justify-content:flex-end}

/* ---------- 底部 CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--dark);color:var(--dark-text);
  border-radius:var(--r-lg);padding:40px 28px;margin-top:56px;
}
.cta-band::before{
  content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;opacity:.14;
}
.cta-inner{position:relative;display:flex;flex-direction:column;gap:22px}
@media (min-width:768px){.cta-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:36px}}
.cta-inner h2{color:#fff;font-size:24px;margin-bottom:8px}
.cta-inner p{color:var(--dark-muted);font-size:15px;margin:0}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:var(--dark-text);margin-top:88px;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px;padding-bottom:44px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr}}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;margin-bottom:16px}
.footer-brand:hover{color:#fff;text-decoration:none}
.footer-desc{font-size:14px;color:var(--dark-muted);line-height:1.8;max-width:340px}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.footer-tags span{
  font-size:13px;padding:4px 12px;border-radius:999px;background:rgba(108,59,244,.22);color:#CFC4FF;
}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:14px;color:var(--dark-muted)}
.footer-col ul a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-col .muted{font-size:14px;color:var(--dark-muted);line-height:1.7}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.10);padding:20px 0 26px;display:flex;flex-direction:column;gap:8px;
  font-size:13px;color:rgba(237,235,247,.54);
}
@media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between}}

/* ---------- 移动端底部 Tab ---------- */
.mobile-tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:1040;
  display:grid;grid-template-columns:repeat(4,1fr);
  background:rgba(255,255,255,.98);border-top:1px solid var(--divider);
  padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -4px 20px rgba(20,18,31,.06);
}
.tab-item{
  height:58px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:11px;color:var(--text-3);font-weight:500;transition:color var(--ease),background var(--ease);
  -webkit-tap-highlight-color:transparent;
}
.tab-item svg{width:22px;height:22px;stroke-width:1.75;stroke:currentColor;fill:none;stroke-linecap:round;stroke-linejoin:round}
.tab-item:hover{text-decoration:none;color:var(--brand-hover)}
.tab-item:active{background:rgba(108,59,244,.12)}
.tab-item.is-active{color:var(--brand);font-weight:600}
@media (min-width:992px){
  .mobile-tabbar{display:none}
  body{padding-bottom:0}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .btn:hover,.news-card:hover{transform:none}
}

/* roulang page: category1 */
:root{
  --brand:#6C3BF4;
  --brand-hover:#5A2BE0;
  --brand-press:#4B21C4;
  --brand-soft:#F1ECFF;
  --mint:#00C9A7;
  --amber:#FFB020;
  --bg:#F6F5FB;
  --surface:#FFFFFF;
  --surface-soft:#FBFAFE;
  --dark:#14121F;
  --dark-ink:#EDEBF7;
  --dark-ink-2:rgba(237,235,247,.68);
  --ink:#1B1A24;
  --ink-2:#5C5870;
  --ink-3:#8A8699;
  --line:#E7E4F2;
  --line-soft:#EFEDF7;
  --r-card:16px;
  --r-lg:22px;
  --r-btn:12px;
  --sh-card:0 1px 2px rgba(20,18,31,.04), 0 8px 24px rgba(20,18,31,.06);
  --sh-hover:0 12px 32px rgba(20,18,31,.10);
  --ease:180ms ease-out;

  --bs-primary:#6C3BF4;
  --bs-primary-rgb:108,59,244;
  --bs-link-color:#5A2BE0;
  --bs-link-hover-color:#4B21C4;
  --bs-body-bg:#F6F5FB;
  --bs-body-color:#1B1A24;
  --bs-border-color:#E7E4F2;
  --bs-border-radius:16px;
  --bs-font-sans-serif:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.85;
  padding-bottom:78px;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block}
a{color:var(--brand-hover);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px;color:var(--brand-press)}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;color:var(--ink)}
h1{font-size:42px}
h2{font-size:31px}
h3{font-size:22px}
h4{font-size:18px}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line-soft);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 22px rgba(20,18,31,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:var(--ink)}
.brand:hover{text-decoration:none;color:var(--brand-hover)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),#8A63FF);color:#fff;font-size:15px;flex:none;
}
.nav-desktop{display:flex;align-items:center;gap:4px}
.nav-link{position:relative;padding:9px 13px;border-radius:10px;font-size:15px;font-weight:500;color:var(--ink-2);transition:color var(--ease),background var(--ease)}
.nav-link:hover{color:var(--brand-hover);background:var(--brand-soft);text-decoration:none}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:13px;right:13px;bottom:-2px;height:2px;border-radius:2px;background:var(--brand)}
.header-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:#fff;color:var(--ink);font-size:18px;align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);border:1px solid transparent;font-weight:600;font-size:15px;
  padding:11px 20px;line-height:1.4;transition:transform var(--ease),background var(--ease),box-shadow var(--ease),color var(--ease);
  text-align:center;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-brand{background:var(--brand);color:#fff}
.btn-brand:hover{background:var(--brand-hover);color:#fff;box-shadow:0 10px 24px rgba(108,59,244,.28)}
.btn-brand:active{background:var(--brand-press)}
.btn-ghost{background:var(--brand-soft);border-color:#DED4FF;color:var(--brand-hover)}
.btn-ghost:hover{background:#E8E0FF;color:var(--brand-press)}
.btn-mint{background:var(--mint);color:#06322B}
.btn-mint:hover{background:#00B699;color:#06322B;box-shadow:0 10px 24px rgba(0,201,167,.28)}
.btn-outline-light-ink{background:transparent;border-color:rgba(237,235,247,.4);color:var(--dark-ink)}
.btn-outline-light-ink:hover{background:rgba(237,235,247,.12);color:#fff}
.btn-sm{padding:8px 16px;font-size:14px}
.btn-lg{padding:14px 26px;font-size:16px}

/* ---------- badges ---------- */
.badge-pill{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;
  padding:4px 12px;border-radius:999px;background:rgba(108,59,244,.12);color:var(--brand-hover);
}
.badge-pill.is-mint{background:rgba(0,201,167,.14);color:#0A7B69}
.badge-pill.is-amber{background:rgba(255,176,32,.18);color:#95600A}

/* ---------- breadcrumb ---------- */
.breadcrumb-bar{background:var(--surface-soft);border-bottom:1px solid var(--line-soft)}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--ink-3);padding:14px 0;margin:0;list-style:none}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li+li::before{content:"/";color:#C6C1DA}
.crumb a{color:var(--ink-2)}
.crumb .is-current{color:var(--brand);font-weight:600}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:56px 0 68px;
  background:
    radial-gradient(920px 420px at 88% -20%, rgba(108,59,244,.18), transparent 62%),
    radial-gradient(620px 320px at -6% 106%, rgba(0,201,167,.14), transparent 66%),
    var(--bg);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;opacity:.14;pointer-events:none;
}
.page-hero .container{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--brand-hover);background:#fff;border:1px solid var(--line);
  padding:6px 14px;border-radius:999px;box-shadow:var(--sh-card);margin-bottom:18px;
}
.hero-title{margin-bottom:16px}
.hero-lead{font-size:17px;line-height:1.85;color:var(--ink-2);max-width:620px;margin-bottom:24px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px}
.hero-points li{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-2);
  background:#fff;border:1px solid var(--line-soft);border-radius:999px;padding:7px 14px;
}
.hero-points i{color:var(--mint)}
.hero-figure{
  position:relative;border-radius:var(--r-lg);overflow:hidden;background:#fff;
  box-shadow:var(--sh-card);border:1px solid var(--line-soft);
}
.hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-figure::after{content:"";position:absolute;inset:0;box-shadow:inset 0 0 0 1px rgba(20,18,31,.05),inset 0 -40px 60px rgba(20,18,31,.08);pointer-events:none;border-radius:var(--r-lg)}

/* ---------- section ---------- */
.section{padding:92px 0}
.section-sm{padding:60px 0}
.section-alt{background:var(--surface-soft);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{margin-bottom:12px}
.section-head p{color:var(--ink-2);margin:0;font-size:16px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* ---------- feature cards ---------- */
.feature-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.feature-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line-soft);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card);
  transition:transform var(--ease),box-shadow var(--ease);
}
.feature-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover)}
.feature-card .thumb{aspect-ratio:4/3;overflow:hidden;background:linear-gradient(135deg,rgba(108,59,244,.14),rgba(0,201,167,.14))}
.feature-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out}
.feature-card:hover .thumb img{transform:scale(1.03)}
.feature-card .body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.feature-card h3{font-size:20px}
.feature-card p{color:var(--ink-2);font-size:15px;margin:0}
.card-link{margin-top:auto;display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-hover)}
.card-link i{transition:transform var(--ease)}
.card-link:hover i{transform:translateX(3px)}

/* ---------- keybar ---------- */
.keybar{
  background:#FBFAFE;border:1px solid var(--line-soft);border-radius:var(--r-lg);
  padding:26px 28px;display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
}
.keybar-item{display:flex;gap:12px;align-items:flex-start}
.keybar-item i{
  width:38px;height:38px;flex:none;border-radius:12px;display:grid;place-items:center;
  background:rgba(108,59,244,.12);color:var(--brand-hover);font-size:15px;
}
.keybar-item:nth-child(2) i{background:rgba(0,201,167,.14);color:#0A7B69}
.keybar-item:nth-child(3) i{background:rgba(255,176,32,.18);color:#95600A}
.keybar-item strong{display:block;font-size:15px;margin-bottom:2px}
.keybar-item span{font-size:14px;color:var(--ink-2);line-height:1.7}

/* ---------- prep split ---------- */
.prep-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:start}
.check-list{display:grid;gap:14px}
.check-list li{
  display:flex;gap:14px;background:#fff;border:1px solid var(--line-soft);
  border-radius:var(--r-card);padding:18px 20px;box-shadow:var(--sh-card);
}
.check-list i{
  width:30px;height:30px;flex:none;border-radius:9px;display:grid;place-items:center;
  background:rgba(0,201,167,.14);color:#0A7B69;font-size:13px;margin-top:2px;
}
.check-list strong{display:block;font-size:16px;margin-bottom:2px}
.check-list span{font-size:14.5px;color:var(--ink-2);line-height:1.75}
.spec-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r-card);
  padding:22px 24px;box-shadow:var(--sh-card);position:sticky;top:88px;
}
.spec-card h3{font-size:18px;margin-bottom:14px}
.spec-list{margin:0}
.spec-list div{
  display:flex;justify-content:space-between;gap:16px;
  padding:12px 0;border-bottom:1px solid var(--line-soft);font-size:15px;
}
.spec-list div:last-child{border-bottom:0;padding-bottom:0}
.spec-list dt{color:var(--ink-3);font-weight:400;margin:0}
.spec-list dd{margin:0;font-weight:600;color:var(--ink);text-align:right}

/* ---------- platform grid ---------- */
.platform-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.platform-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--r-card);
  padding:22px 20px;box-shadow:var(--sh-card);transition:transform var(--ease),box-shadow var(--ease);
}
.platform-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover)}
.platform-card .ico{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;font-size:18px;
  background:rgba(108,59,244,.12);color:var(--brand-hover);margin-bottom:14px;
}
.platform-card:nth-child(2) .ico{background:rgba(0,201,167,.14);color:#0A7B69}
.platform-card:nth-child(3) .ico{background:rgba(255,176,32,.18);color:#95600A}
.platform-card:nth-child(4) .ico{background:rgba(108,59,244,.10);color:var(--brand-hover)}
.platform-card h3{font-size:17px;margin-bottom:6px}
.platform-card p{font-size:14px;color:var(--ink-2);margin:0}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.accordion-item{
  border:1px solid var(--line-soft);border-radius:14px;background:#fff;
  margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-card);
}
.accordion-button{
  font-size:16px;font-weight:600;color:var(--ink);background:#fff;
  padding:18px 20px;box-shadow:none;border:0;
}
.accordion-button:not(.collapsed){color:var(--brand-hover);background:#FCFBFF;border-left:3px solid var(--brand)}
.accordion-button:focus{box-shadow:none;border-color:transparent}
.accordion-button::after{
  width:1.15rem;height:1.15rem;background-size:1.15rem;
  background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%236C3BF4'%3e%3cpath d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
  transition:transform 200ms ease-out;
}
.accordion-button:not(.collapsed)::after{transform:rotate(180deg)}
.accordion-body{padding:6px 20px 20px;color:var(--ink-2);font-size:15px;line-height:1.85}

/* ---------- cross links ---------- */
.cross-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cross-card{
  display:block;background:#fff;border:1px solid var(--line-soft);border-radius:var(--r-card);
  padding:22px 22px 24px;box-shadow:var(--sh-card);color:inherit;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.cross-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#DED4FF;text-decoration:none}
.cross-card h3{font-size:18px;margin:12px 0 8px}
.cross-card p{font-size:14px;color:var(--ink-2);margin:0}
.cross-card .go{margin-top:14px;display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-hover)}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;background:linear-gradient(120deg,#3A1C9E 0%,#241352 55%,#14121F 100%);
  color:var(--dark-ink);padding:72px 0;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;opacity:.12;pointer-events:none;
}
.cta-band .container{position:relative;z-index:1}
.cta-grid{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px}
.cta-grid h2{color:#fff;margin-bottom:10px}
.cta-grid p{color:var(--dark-ink-2);margin:0;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-note{margin-top:26px;font-size:14px;color:var(--dark-ink-2)}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:var(--dark-ink);padding:66px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px;border-bottom:1px solid rgba(237,235,247,.14)}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:#fff}
.footer-brand:hover{color:#fff;text-decoration:none}
.footer-desc{margin:16px 0;font-size:14.5px;line-height:1.8;color:var(--dark-ink-2);max-width:340px}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-tags span{
  font-size:13px;padding:4px 12px;border-radius:999px;
  background:rgba(108,59,244,.26);color:#D9CDFF;
}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer-col ul{display:grid;gap:10px}
.footer-col a,.footer-col .muted{font-size:14.5px;color:var(--dark-ink-2)}
.footer-col a:hover{color:#fff}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding-top:22px;font-size:13.5px;color:rgba(237,235,247,.56);
}

/* ---------- drawer ---------- */
.drawer{background:#fff;max-width:320px}
.drawer .offcanvas-header{border-bottom:1px solid var(--line-soft);padding:18px 20px}
.drawer .brand-text{font-weight:700;font-size:16px}
.drawer .offcanvas-body{padding:16px 20px 24px}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 12px;border-radius:12px;font-size:15.5px;color:var(--ink-2);font-weight:500;
}
.drawer-link:hover{background:var(--brand-soft);color:var(--brand-hover);text-decoration:none}
.drawer-link.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600}

/* ---------- mobile tabbar ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:1040;display:flex;
  background:rgba(255,255,255,.97);border-top:1px solid var(--line-soft);
  padding-bottom:env(safe-area-inset-bottom);
}
.tab-item{
  flex:1;height:58px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:2px;font-size:11px;color:var(--ink-3);
}
.tab-item i{font-size:19px}
.tab-item:hover{text-decoration:none;color:var(--brand-hover)}
.tab-item:active{background:rgba(108,59,244,.12)}
.tab-item.is-active{color:var(--brand);font-weight:600}

/* ---------- responsive ---------- */
@media (min-width:992px){
  .tabbar{display:none}
  body{padding-bottom:0}
}
@media (max-width:1199.98px){
  .feature-cards{gap:20px}
}
@media (max-width:991.98px){
  h1{font-size:32px}
  h2{font-size:24px}
  .nav-desktop{display:none}
  .nav-toggle{display:inline-flex}
  .section{padding:64px 0}
  .section-sm{padding:48px 0}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-lead{font-size:16px}
  .prep-grid{grid-template-columns:1fr}
  .spec-card{position:static}
  .platform-grid{grid-template-columns:repeat(2,1fr)}
  .cross-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .page-hero{padding:44px 0 56px}
}
@media (max-width:767.98px){
  .feature-cards{grid-template-columns:1fr}
  .keybar{grid-template-columns:1fr;padding:22px}
  .cta-grid{flex-direction:column;align-items:flex-start}
  .site-footer{padding-top:52px}
}
@media (max-width:575.98px){
  .container{padding-left:16px;padding-right:16px}
  h1{font-size:29px}
  .hero-actions .btn{flex:1 1 100%}
  .platform-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-points li{font-size:13.5px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}

/* roulang page: category2 */
:root{
  --brand:#6C3BF4;
  --brand-hover:#5A2BE0;
  --brand-active:#4B21C4;
  --brand-soft:#F1ECFF;
  --mint:#00C9A7;
  --mint-deep:#046A57;
  --amber:#FFB020;
  --bg:#F6F5FB;
  --bg-soft:#FBFAFE;
  --dark:#14121F;
  --dark-2:#1E1B2E;
  --dark-ink:#EDEBF7;
  --dark-muted:rgba(237,235,247,.68);
  --ink:#1B1A24;
  --ink-2:#5C5870;
  --ink-3:#8A8699;
  --line:#E7E4F2;
  --line-2:#EFEDF7;
  --danger:#E5484D;
  --radius:16px;
  --radius-lg:22px;
  --radius-sm:12px;
  --shadow:0 1px 2px rgba(20,18,31,.04),0 8px 24px rgba(20,18,31,.06);
  --shadow-hover:0 12px 32px rgba(20,18,31,.10);
  --bs-primary:#6C3BF4;
  --bs-primary-rgb:108,59,244;
  --bs-body-font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --bs-body-color:#1B1A24;
  --bs-link-color:#5A2BE0;
  --bs-link-hover-color:#4B21C4;
  --bs-border-radius:12px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  padding-bottom:78px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand-hover);text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--brand-active);text-decoration:underline;text-underline-offset:3px}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{font-weight:700;line-height:1.3;color:var(--ink);margin:0 0 .5em}
h1{font-size:28px}
h2{font-size:22px}
h3{font-size:19px}
h4{font-size:18px;font-weight:600}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.num{font-variant-numeric:tabular-nums}

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

/* ---------- 按钮 ---------- */
.btn{border-radius:var(--radius-sm);font-weight:600;padding:11px 22px;font-size:15.5px;line-height:1.4;transition:transform .18s ease-out,background-color .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;border:1px solid transparent;display:inline-flex;align-items:center;justify-content:center;gap:8px}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn-brand{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-brand:hover,.btn-brand:focus{background:var(--brand-hover);border-color:var(--brand-hover);color:#fff;transform:translateY(-1px);text-decoration:none}
.btn-brand:active{background:var(--brand-active);border-color:var(--brand-active);transform:none}
.btn-ghost{background:var(--brand-soft);border-color:#DCD2FB;color:var(--brand-hover)}
.btn-ghost:hover,.btn-ghost:focus{background:#E7DEFF;border-color:#CDBEF9;color:var(--brand-active);transform:translateY(-1px);text-decoration:none}
.btn-mint{background:var(--mint);border-color:var(--mint);color:#052F27}
.btn-mint:hover,.btn-mint:focus{background:#00B798;border-color:#00B798;color:#04231D;transform:translateY(-1px);text-decoration:none}
.btn-outline-light-2{background:transparent;border-color:rgba(237,235,247,.45);color:var(--dark-ink)}
.btn-outline-light-2:hover,.btn-outline-light-2:focus{background:rgba(237,235,247,.12);color:#fff;border-color:rgba(237,235,247,.7);text-decoration:none}
.btn-sm{padding:8px 16px;font-size:14.5px}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:1035;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line-2);transition:box-shadow .18s ease-out,background-color .18s ease-out}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(20,18,31,.08);background:rgba(255,255,255,.88);backdrop-filter:blur(8px)}
.header-inner{display:flex;align-items:center;gap:16px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:16.5px;flex:none}
.brand:hover{color:var(--brand-hover);text-decoration:none}
.brand-mark{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(135deg,#6C3BF4 0%,#8B5CF6 100%);color:#fff;font-size:15px;flex:none}
.brand-text{white-space:nowrap}
.nav-desktop{display:none;align-items:center;gap:2px;margin-left:auto}
.nav-link{position:relative;padding:9px 12px;font-size:15px;color:var(--ink-2);border-radius:10px;white-space:nowrap;transition:color .18s ease-out,background-color .18s ease-out}
.nav-link:hover{color:var(--brand-hover);background:var(--brand-soft);text-decoration:none}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--brand)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-toggle{width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--ink);display:grid;place-items:center;font-size:17px;transition:background-color .18s ease-out,border-color .18s ease-out}
.nav-toggle:hover{background:var(--brand-soft);border-color:#DCD2FB;color:var(--brand-hover)}
@media (min-width:992px){
  .nav-desktop{display:flex}
  .nav-toggle{display:none}
}

/* ---------- 移动抽屉 ---------- */
.offcanvas.drawer{background:#fff;max-width:82vw}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line-2)}
.drawer-body{padding:12px 12px 20px;display:flex;flex-direction:column;gap:4px}
.drawer-link{padding:14px 16px;border-radius:12px;color:var(--ink-2);font-weight:500;font-size:15.5px}
.drawer-link:hover{background:var(--brand-soft);color:var(--brand-hover);text-decoration:none}
.drawer-link.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.drawer-foot{margin-top:auto;padding:16px 20px 24px;border-top:1px solid var(--line-2)}
.btn-close-2{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--ink-2);display:grid;place-items:center}

/* ---------- 面包屑 ---------- */
.crumb-row{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-3);flex-wrap:wrap}
.crumb-row a{color:var(--ink-2)}
.crumb-row .sep{color:var(--ink-3)}
.crumb-row .current{color:var(--brand);font-weight:600}

/* ---------- 徽章 ---------- */
.badge-soft{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;padding:5px 12px;border-radius:999px;line-height:1.5}
.badge-purple{background:rgba(108,59,244,.12);color:#4B21C4}
.badge-mint{background:rgba(0,201,167,.14);color:#067A63}
.badge-amber{background:rgba(255,176,32,.16);color:#96620A}
.badge-dark-soft{background:rgba(237,235,247,.14);color:var(--dark-ink)}

/* ---------- Hero ---------- */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line-2);background:linear-gradient(180deg,#FFFFFF 0%,#F6F5FB 100%)}
.page-hero::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:.13;pointer-events:none}
.page-hero-inner{position:relative;z-index:1;padding-top:40px;padding-bottom:48px}
.page-hero h1{margin-top:16px;margin-bottom:14px;font-size:29px;letter-spacing:-.01em}
.hero-lead{max-width:720px;font-size:16.5px;color:var(--ink-2);line-height:1.85}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:30px;padding-top:22px;border-top:1px solid var(--line-2)}
.fact{display:flex;align-items:center;gap:8px;font-size:14.5px;color:var(--ink-2)}
.fact i{color:var(--brand);font-size:14px}
@media (min-width:992px){
  .page-hero-inner{padding-top:58px;padding-bottom:62px}
  .page-hero h1{font-size:40px}
}

/* ---------- 板块 ---------- */
.section{padding:56px 0}
@media (min-width:992px){.section{padding:92px 0}}
.section-head{max-width:720px;margin-bottom:30px}
.section-sub{color:var(--ink-2);font-size:16px;margin:0}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;color:var(--brand);letter-spacing:.08em;margin-bottom:10px}
.section-alt{background:var(--bg-soft);border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2)}

/* ---------- 时间线 ---------- */
.timeline{position:relative;margin-top:8px}
.timeline::before{content:"";position:absolute;left:19px;top:12px;bottom:20px;width:2px;background:var(--line-2)}
.tl-item{position:relative;padding-left:62px;padding-bottom:30px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{position:absolute;left:0;top:0;width:40px;height:40px;border-radius:50%;background:#fff;border:2px solid var(--brand);color:var(--brand);display:grid;place-items:center;font-weight:700;font-size:15px;font-variant-numeric:tabular-nums}
.tl-item h3{margin-bottom:8px;font-size:18.5px}
.tl-item p{color:var(--ink-2);font-size:15.5px;margin-bottom:10px}
.tl-meta{display:flex;flex-wrap:wrap;gap:8px}
.tl-tag{font-size:13px;padding:4px 11px;border-radius:999px;background:var(--bg-soft);border:1px solid var(--line-2);color:var(--ink-2)}

/* ---------- 卡片 / 侧栏 ---------- */
.panel{background:#fff;border:1px solid var(--line-2);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:transform .18s ease-out,box-shadow .18s ease-out}
.panel-hover:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.side-card{background:#fff;border:1px solid var(--line-2);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.side-card-media{width:100%;aspect-ratio:4/3;object-fit:cover;background:linear-gradient(135deg,rgba(108,59,244,.12),rgba(0,201,167,.12))}
.side-card-body{padding:20px}
.spec-list{margin:0}
.spec-list .row-item{display:flex;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px solid var(--line-2);font-size:14.5px}
.spec-list .row-item:last-child{border-bottom:0;padding-bottom:0}
.spec-list dt{color:var(--ink-2);margin:0;font-weight:400}
.spec-list dd{margin:0;font-weight:600;color:var(--ink);text-align:right;font-variant-numeric:tabular-nums}
.sticky-wrap{position:static}
@media (min-width:992px){.sticky-wrap{position:sticky;top:92px}}

/* ---------- 功能分组卡 ---------- */
.card-media{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:12px;background:linear-gradient(135deg,rgba(108,59,244,.12),rgba(0,201,167,.12))}
.feature-card{display:flex;flex-direction:column;gap:16px;height:100%}
.feature-card h3{margin-bottom:6px}
.feature-card p{color:var(--ink-2);font-size:15.5px;margin:0}
.check-list{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.check-list li{display:flex;gap:9px;font-size:14.5px;color:var(--ink-2);line-height:1.7}
.check-list i{color:var(--mint);font-size:14px;margin-top:5px;flex:none}

/* ---------- 深色数据带 ---------- */
.dark-band{position:relative;background:var(--dark);color:var(--dark-ink);overflow:hidden;padding:56px 0}
.dark-band::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;opacity:.14}
.dark-band::after{content:"";position:absolute;top:-120px;right:-80px;width:360px;height:360px;border-radius:50%;background:radial-gradient(circle,rgba(108,59,244,.45),transparent 68%);pointer-events:none}
.dark-band .container{position:relative;z-index:1}
.dark-band h2{color:#fff}
.dark-band p{color:var(--dark-muted)}
@media (min-width:992px){.dark-band{padding:84px 0}}
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.stat-card{background:rgba(237,235,247,.07);border:1px solid rgba(237,235,247,.12);border-radius:var(--radius);padding:18px}
.stat-num{font-size:26px;font-weight:700;color:#fff;line-height:1.2;font-variant-numeric:tabular-nums}
.stat-label{font-size:13.5px;color:var(--dark-muted);margin-top:4px}
.rank-list{margin-top:22px;background:rgba(237,235,247,.05);border:1px solid rgba(237,235,247,.12);border-radius:var(--radius);overflow:hidden}
.rank-row{display:flex;align-items:center;gap:14px;padding:13px 18px;border-bottom:1px solid rgba(237,235,247,.08);font-size:14.5px}
.rank-row:last-child{border-bottom:0}
.rank-idx{width:24px;height:24px;border-radius:8px;display:grid;place-items:center;font-size:13px;font-weight:700;background:rgba(237,235,247,.12);color:var(--dark-ink);font-variant-numeric:tabular-nums;flex:none}
.rank-idx.top{background:rgba(255,176,32,.2);color:var(--amber)}
.rank-name{flex:1;color:var(--dark-ink)}
.rank-val{color:var(--mint);font-weight:600;font-variant-numeric:tabular-nums}

/* ---------- FAQ ---------- */
.faq-acc .accordion-item{background:#fff;border:1px solid var(--line-2);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;box-shadow:0 1px 2px rgba(20,18,31,.03)}
.faq-acc .accordion-button{background:#fff;color:var(--ink);font-weight:600;font-size:16px;padding:18px 20px;border:0;box-shadow:none;border-radius:var(--radius)}
.faq-acc .accordion-button:not(.collapsed){color:var(--brand);background:var(--bg-soft);box-shadow:inset 3px 0 0 var(--brand)}
.faq-acc .accordion-button:focus{box-shadow:0 0 0 3px rgba(108,59,244,.12);z-index:2}
.faq-acc .accordion-button::after{content:"";background-image:none;width:11px;height:11px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg);margin-left:auto;margin-top:-5px;flex:none;transition:transform .2s ease-out}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);margin-top:4px}
.faq-acc .accordion-body{padding:2px 20px 20px;color:var(--ink-2);font-size:15.5px;line-height:1.85;background:#fff}

/* ---------- 分类互链 ---------- */
.link-card{display:flex;flex-direction:column;gap:12px;height:100%}
.link-card h3{margin:0;font-size:18px}
.link-card p{color:var(--ink-2);font-size:15px;margin:0;flex:1}
.link-card .more{font-weight:600;font-size:14.5px;color:var(--brand-hover);display:inline-flex;align-items:center;gap:7px}
.link-card .more i{transition:transform .18s ease-out}
.link-card:hover .more i{transform:translateX(3px)}
a.link-card{color:inherit}
a.link-card:hover{text-decoration:none;color:inherit}

/* ---------- CTA ---------- */
.cta-box{background:linear-gradient(135deg,#6C3BF4 0%,#4B21C4 100%);border-radius:var(--radius-lg);padding:32px;color:#fff;box-shadow:var(--shadow)}
.cta-box h2{color:#fff;margin-bottom:10px}
.cta-box p{color:rgba(255,255,255,.86);margin-bottom:22px;max-width:640px}
@media (min-width:992px){.cta-box{padding:46px 48px}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:var(--dark-muted);padding:56px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16.5px;margin-bottom:14px}
.footer-brand:hover{color:#fff;text-decoration:none}
.footer-desc{font-size:14.5px;line-height:1.85;max-width:340px;color:var(--dark-muted)}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.footer-tags span{font-size:13px;padding:4px 11px;border-radius:999px;background:rgba(237,235,247,.1);color:var(--dark-ink)}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:var(--dark-muted);font-size:14.5px}
.footer-col a:hover{color:#fff;text-decoration:none}
.footer-col .muted{font-size:14.5px;color:var(--dark-muted)}
.footer-bottom{margin-top:40px;padding-top:20px;border-top:1px solid rgba(237,235,247,.12);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13.5px;color:rgba(237,235,247,.55)}

/* ---------- 移动底部 Tab ---------- */
.mobile-tabbar{position:fixed;left:0;right:0;bottom:0;z-index:1040;display:grid;grid-template-columns:repeat(5,1fr);background:#fff;border-top:1px solid var(--line-2);padding-bottom:env(safe-area-inset-bottom);box-shadow:0 -6px 20px rgba(20,18,31,.07)}
.tab-item{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;height:58px;color:var(--ink-3);font-size:11.5px;line-height:1.3}
.tab-item:hover{color:var(--brand-hover);text-decoration:none}
.tab-item svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}
.tab-item.is-active{color:var(--brand);font-weight:600}
.tab-item:active{background:rgba(108,59,244,.12)}
@media (min-width:992px){.mobile-tabbar{display:none}}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important}
  .panel-hover:hover,.btn:hover{transform:none !important}
}

/* roulang page: category3 */
:root{
  --brand:#6C3BF4;
  --brand-hover:#5A2BE0;
  --brand-active:#4B21C4;
  --brand-soft:#F1ECFF;
  --mint:#00C9A7;
  --mint-soft:rgba(0,201,167,.12);
  --amber:#FFB020;
  --bg:#F6F5FB;
  --paper:#FFFFFF;
  --dark:#14121F;
  --dark-ink:#EDEBF7;
  --dark-ink-2:rgba(237,235,247,.68);
  --ink:#1B1A24;
  --ink-2:#5C5870;
  --ink-3:#8A8699;
  --line:#E7E4F2;
  --divider:#EFEDF7;
  --r-card:16px;
  --r-lg:22px;
  --r-btn:12px;
  --sh-card:0 1px 2px rgba(20,18,31,.04), 0 8px 24px rgba(20,18,31,.06);
  --sh-hover:0 12px 32px rgba(20,18,31,.10);
  --sh-soft:0 1px 2px rgba(20,18,31,.04);
  --bs-primary:#6C3BF4;
  --bs-primary-rgb:108,59,244;
  --bs-link-color:#5A2BE0;
  --bs-link-hover-color:#4B21C4;
  --bs-body-color:#1B1A24;
  --bs-border-color:#E7E4F2;
  --bs-border-radius:12px;
  --bs-font-sans-serif:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,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(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
body.has-tabbar{padding-bottom:0;}
img{max-width:100%;height:auto;display:block;}
a{color:#5A2BE0;text-decoration:none;transition:color .18s ease-out;}
a:hover{color:var(--brand-active);text-decoration:underline;text-underline-offset:3px;}
button{font-family:inherit;}
h1,h2,h3,h4{line-height:1.3;font-weight:700;color:var(--ink);margin:0;}
p{margin:0 0 1em;line-height:1.85;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
dl,dd,dt{margin:0;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ---------- 按钮 ---------- */
.btn{
  --bs-btn-focus-box-shadow:none;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:var(--r-btn);
  font-weight:600;
  font-size:16px;
  padding:13px 24px;
  border:1px solid transparent;
  transition:transform .18s ease-out, background-color .18s ease-out, box-shadow .18s ease-out, color .18s ease-out, border-color .18s ease-out;
  line-height:1.4;
  white-space:nowrap;
}
.btn:focus{box-shadow:0 0 0 3px rgba(108,59,244,.18);}
.btn-brand{
  background:var(--brand);
  color:#fff;
  box-shadow:0 1px 2px rgba(20,18,31,.06), 0 6px 18px rgba(108,59,244,.22);
}
.btn-brand:hover,.btn-brand:focus{
  background:var(--brand-hover);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:0 10px 26px rgba(108,59,244,.28);
  text-decoration:none;
}
.btn-brand:active{background:var(--brand-active);transform:translateY(0);}
.btn-outline-brand{
  background:var(--brand-soft);
  border-color:#DCD2FB;
  color:var(--brand-hover);
}
.btn-outline-brand:hover{
  background:#E7DEFD;
  border-color:#C9B8F9;
  color:var(--brand-active);
  transform:translateY(-1px);
  text-decoration:none;
}
.btn-mint{
  background:var(--mint);
  color:#0E2B26;
  box-shadow:0 6px 18px rgba(0,201,167,.26);
}
.btn-mint:hover{background:#00B597;color:#0E2B26;transform:translateY(-1px);text-decoration:none;}
.btn-ghost-light{
  background:transparent;
  border-color:rgba(237,235,247,.38);
  color:var(--dark-ink);
}
.btn-ghost-light:hover{
  background:rgba(237,235,247,.10);
  border-color:rgba(237,235,247,.6);
  color:#fff;
  text-decoration:none;
  transform:translateY(-1px);
}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:10px;}

/* ---------- 徽章 / 标签 ---------- */
.badge-soft{
  display:inline-flex;
  align-items:center;
  gap:6px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  padding:5px 12px;
  line-height:1.5;
}
.badge-purple{background:rgba(108,59,244,.12);color:#5A2BE0;}
.badge-mint{background:rgba(0,201,167,.14);color:#00836D;}
.badge-amber{background:rgba(255,176,32,.15);color:#9A6300;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--divider);
  transition:box-shadow .2s ease-out, backdrop-filter .2s ease-out;
}
.site-header.is-scrolled{
  box-shadow:0 6px 22px rgba(20,18,31,.07);
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:68px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--ink);
  font-weight:700;
  font-size:17px;
  letter-spacing:.2px;
  flex-shrink:0;
}
.brand:hover{color:var(--brand-hover);text-decoration:none;}
.brand-mark{
  width:34px;height:34px;
  border-radius:11px;
  background:linear-gradient(135deg,var(--brand) 0%,#8C63F7 55%,var(--mint) 140%);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:15px;
  flex-shrink:0;
  box-shadow:0 4px 12px rgba(108,59,244,.28);
}
.brand-text{white-space:nowrap;}
.nav-desktop{
  display:none;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 6px;
  font-size:15px;
  font-weight:500;
  color:var(--ink-2);
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:6px;right:6px;
  bottom:-2px;
  height:2px;
  border-radius:2px;
  background:transparent;
  transition:background-color .18s ease-out;
}
.nav-link:hover{color:var(--brand-hover);text-decoration:none;}
.nav-link:hover::after{background:rgba(108,59,244,.28);}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{background:var(--brand);}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:auto;
}
.nav-desktop + .header-actions{margin-left:0;}
.nav-toggle{
  width:42px;height:42px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#fff;
  color:var(--ink);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:17px;
  transition:background-color .18s ease-out, border-color .18s ease-out;
}
.nav-toggle:hover{background:var(--brand-soft);border-color:#DCD2FB;color:var(--brand-hover);}
.nav-toggle:active{background:rgba(108,59,244,.18);}

/* 抽屉导航 */
.offcanvas.drawer{
  width:min(86vw,340px);
  border-right:1px solid var(--divider);
}
.drawer .offcanvas-header{
  border-bottom:1px solid var(--divider);
  padding:18px 20px;
}
.drawer .offcanvas-title{font-size:16px;font-weight:700;}
.drawer .offcanvas-body{padding:14px 12px 26px;display:flex;flex-direction:column;gap:4px;}
.drawer-link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:13px 14px;
  border-radius:12px;
  color:var(--ink);
  font-size:15.5px;
  font-weight:500;
  transition:background-color .18s ease-out,color .18s ease-out;
}
.drawer-link:hover{background:var(--bg);color:var(--brand-hover);text-decoration:none;}
.drawer-link.is-active{background:var(--brand-soft);color:var(--brand);font-weight:600;}
.drawer-link i{font-size:13px;color:var(--ink-3);}
.drawer-foot{margin-top:auto;padding:18px 8px 0;border-top:1px solid var(--divider);}
.drawer-foot .btn{width:100%;}

/* ---------- 面包屑 ---------- */
.crumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:14px;
  color:var(--ink-3);
  padding:18px 0;
}
.crumb a{color:var(--ink-2);}
.crumb a:hover{color:var(--brand-hover);}
.crumb .sep{color:#C6C2D6;}
.crumb .current{color:var(--brand);font-weight:600;}

/* ---------- Hero（深色氛围带） ---------- */
.cat-hero{
  position:relative;
  background:var(--dark);
  color:var(--dark-ink);
  overflow:hidden;
  padding:34px 0 64px;
}
.cat-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center right;
  opacity:.18;
  pointer-events:none;
}
.cat-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(115deg, rgba(20,18,31,.96) 0%, rgba(20,18,31,.86) 45%, rgba(108,59,244,.42) 100%);
  pointer-events:none;
}
.cat-hero .container{position:relative;z-index:2;}
.crumb-light{color:rgba(237,235,247,.62);}
.crumb-light a{color:rgba(237,235,247,.82);}
.crumb-light a:hover{color:#fff;}
.crumb-light .sep{color:rgba(237,235,247,.4);}
.crumb-light .current{color:var(--mint);}

.hero-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
  align-items:start;
  margin-top:8px;
}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(0,201,167,.14);
  color:#7FF0DA;
  border:1px solid rgba(0,201,167,.32);
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  padding:6px 14px;
  margin-bottom:18px;
}
.cat-hero h1{
  color:#fff;
  font-size:28px;
  letter-spacing:.4px;
  margin-bottom:16px;
}
.cat-hero-lead{
  color:var(--dark-ink-2);
  font-size:16px;
  line-height:1.9;
  max-width:640px;
  margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
.hero-points{
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  margin-top:26px;
  padding-top:22px;
  border-top:1px solid rgba(237,235,247,.14);
}
.hero-points li{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--dark-ink-2);
}
.hero-points i{color:var(--mint);font-size:13px;}

.hero-aside{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(237,235,247,.14);
  border-radius:var(--r-lg);
  padding:22px;
}
.hero-aside h2{
  color:#fff;
  font-size:16px;
  font-weight:600;
  margin-bottom:16px;
  display:flex;
  align-items:center;
  gap:9px;
}
.hero-aside h2 i{color:var(--amber);}
.stat-row{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  padding:12px 0;
  border-bottom:1px solid rgba(237,235,247,.12);
  font-size:14px;
  color:var(--dark-ink-2);
}
.stat-row:last-child{border-bottom:0;padding-bottom:0;}
.stat-row b{color:#fff;font-size:15px;font-weight:600;}

/* ---------- 通用板块 ---------- */
.section{padding:64px 0;}
.section-tight{padding:52px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head .kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--brand);
  font-size:13px;
  font-weight:700;
  letter-spacing:1.4px;
  text-transform:uppercase;
  margin-bottom:12px;
}
.section-head h2{font-size:24px;margin-bottom:14px;}
.section-head p{color:var(--ink-2);font-size:16px;margin:0;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}

/* ---------- 对比卡 ---------- */
.compare-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
  align-items:stretch;
}
.compare-card{
  position:relative;
  background:#fff;
  border:1px solid var(--divider);
  border-radius:var(--r-card);
  padding:26px 24px;
  box-shadow:var(--sh-card);
  display:flex;
  flex-direction:column;
  transition:transform .18s ease-out, box-shadow .18s ease-out;
}
.compare-card::before{
  content:"";
  position:absolute;
  top:-1px;left:20px;right:20px;
  height:4px;
  border-radius:0 0 4px 4px;
  background:var(--divider);
}
.compare-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);}
.compare-card h3{font-size:20px;margin:14px 0 10px;}
.compare-lead{color:var(--ink-2);font-size:15px;margin-bottom:20px;}
.compare-list{border-top:1px solid var(--divider);padding-top:6px;margin-top:auto;}
.compare-list > div{
  display:flex;
  justify-content:space-between;
  gap:14px;
  padding:11px 0;
  border-bottom:1px solid var(--divider);
  font-size:14.5px;
}
.compare-list > div:last-child{border-bottom:0;}
.compare-list dt{color:var(--ink-3);font-weight:400;flex-shrink:0;}
.compare-list dd{color:var(--ink);font-weight:600;text-align:right;}
.compare-card.is-featured{
  border-color:rgba(108,59,244,.35);
  box-shadow:0 12px 34px rgba(108,59,244,.16);
  transform:scale(1.02);
}
.compare-card.is-featured::before{background:linear-gradient(90deg,var(--brand),#9A79F8);}
.compare-card.is-featured:hover{transform:scale(1.02) translateY(-2px);}
.rec-tag{
  position:absolute;
  top:16px;right:16px;
  background:var(--amber);
  color:#43300A;
  font-size:12px;
  font-weight:700;
  border-radius:999px;
  padding:4px 11px;
}

.note-strip{
  margin-top:26px;
  background:#FBFAFE;
  border:1px solid var(--divider);
  border-radius:var(--r-card);
  padding:20px 24px;
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
}
.note-strip div{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--ink-2);}
.note-strip i{color:var(--mint);margin-top:5px;font-size:13px;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:940px;margin:0 auto;}
.faq-accordion .accordion-item{
  background:#fff;
  border:1px solid var(--divider);
  border-radius:var(--r-card);
  overflow:hidden;
  margin-bottom:14px;
  box-shadow:var(--sh-soft);
}
.faq-accordion .accordion-item:last-child{margin-bottom:0;}
.faq-accordion .accordion-button{
  position:relative;
  background:#fff;
  color:var(--ink);
  font-size:16.5px;
  font-weight:600;
  padding:20px 54px 20px 26px;
  box-shadow:none;
  border:0;
}
.faq-accordion .accordion-button::before{
  content:"";
  position:absolute;
  left:0;top:14px;bottom:14px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:transparent;
  transition:background-color .18s ease-out;
}
.faq-accordion .accordion-button:not(.collapsed){
  background:#FBFAFE;
  color:var(--brand-hover);
}
.faq-accordion .accordion-button:not(.collapsed)::before{background:var(--brand);}
.faq-accordion .accordion-button:focus{box-shadow:0 0 0 3px rgba(108,59,244,.14);}
.faq-accordion .accordion-button::after{
  width:16px;height:16px;
  background-size:16px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%236C3BF4'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
  transition:transform .28s ease-out;
  margin-left:auto;
}
.faq-accordion .accordion-button:not(.collapsed)::after{transform:rotate(180deg);}
.faq-accordion .accordion-body{
  padding:6px 26px 24px;
  color:var(--ink-2);
  font-size:15.5px;
  line-height:1.9;
  background:#FBFAFE;
}
.faq-accordion .accordion-body strong{color:var(--ink);font-weight:600;}

/* ---------- 图文交替 ---------- */
.alt-section{background:#fff;border-top:1px solid var(--divider);border-bottom:1px solid var(--divider);}
.alt-row{
  display:grid;
  grid-template-columns:1fr;
  gap:30px;
  align-items:center;
  padding:8px 0;
}
.alt-row + .alt-row{margin-top:56px;}
.alt-media{
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--divider);
  box-shadow:var(--sh-card);
  background:linear-gradient(135deg,rgba(108,59,244,.12),rgba(0,201,167,.12));
}
.alt-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
}
.alt-copy h3{font-size:22px;margin-bottom:14px;}
.alt-copy p{color:var(--ink-2);font-size:16px;}
.alt-list{margin-top:20px;display:grid;gap:12px;}
.alt-list li{display:flex;align-items:flex-start;gap:10px;font-size:15.5px;color:var(--ink-2);}
.alt-list i{color:var(--brand);margin-top:6px;font-size:13px;}

/* ---------- 分类互链 ---------- */
.cat-links{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
.cat-link-card{
  display:block;
  background:#fff;
  border:1px solid var(--divider);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh-card);
  color:var(--ink);
  transition:transform .18s ease-out, box-shadow .18s ease-out, border-color .18s ease-out;
}
.cat-link-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--sh-hover);
  border-color:#DCD2FB;
  text-decoration:none;
  color:var(--ink);
}
.cat-link-card h3{font-size:18px;margin:14px 0 10px;}
.cat-link-card p{color:var(--ink-2);font-size:14.5px;margin-bottom:16px;}
.cat-link-card .go{
  display:inline-flex;
  align-items:center;
  gap:7px;
  color:var(--brand);
  font-size:14px;
  font-weight:600;
}
.cat-link-card.is-current{border-color:rgba(108,59,244,.35);background:#FBFAFE;}

/* ---------- 底部 CTA ---------- */
.cta-band{
  position:relative;
  background:linear-gradient(128deg,#1B1330 0%,var(--dark) 42%,#2A1A5E 100%);
  color:var(--dark-ink);
  overflow:hidden;
  padding:58px 0;
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-3.png");
  background-size:cover;
  background-position:center;
  opacity:.12;
  pointer-events:none;
}
.cta-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1fr;
  gap:26px;
  align-items:center;
}
.cta-inner h2{color:#fff;font-size:24px;margin-bottom:12px;}
.cta-inner p{color:var(--dark-ink-2);font-size:15.5px;margin:0;max-width:600px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--dark);
  color:var(--dark-ink);
  padding:56px 0 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:34px;
  padding-bottom:34px;
  border-bottom:1px solid rgba(237,235,247,.14);
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-weight:700;
  font-size:17px;
  margin-bottom:16px;
}
.footer-brand:hover{color:#fff;text-decoration:none;}
.footer-desc{
  color:var(--dark-ink-2);
  font-size:14.5px;
  line-height:1.85;
  max-width:340px;
  margin-bottom:18px;
}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;}
.footer-tags span{
  font-size:13px;
  color:#B9B2DC;
  border:1px solid rgba(237,235,247,.18);
  border-radius:999px;
  padding:4px 12px;
}
.footer-col h4{
  color:#fff;
  font-size:15px;
  font-weight:600;
  margin-bottom:16px;
}
.footer-col ul{display:grid;gap:11px;}
.footer-col a,.footer-col .muted{
  color:var(--dark-ink-2);
  font-size:14.5px;
}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  padding-top:22px;
  color:rgba(237,235,247,.56);
  font-size:13.5px;
}

/* ---------- 移动底部 Tab ---------- */
.mobile-tabbar{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:1035;
  display:flex;
  background:#fff;
  border-top:1px solid var(--divider);
  height:calc(58px + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -4px 18px rgba(20,18,31,.06);
}
.tab-item{
  flex:1 1 0;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  font-size:11.5px;
  color:var(--ink-3);
  transition:color .18s ease-out, background-color .18s ease-out;
  padding-top:4px;
}
.tab-item i{font-size:19px;line-height:1;}
.tab-item:hover{color:var(--brand-hover);text-decoration:none;}
.tab-item:active{background:rgba(108,59,244,.12);}
.tab-item.is-active{color:var(--brand);font-weight:600;}

/* ---------- 响应式 ---------- */
@media (min-width:576px){
  .compare-grid{grid-template-columns:repeat(2,1fr);}
  .cat-links{grid-template-columns:repeat(2,1fr);}
  .note-strip{grid-template-columns:repeat(3,1fr);}
  .hero-points{gap:10px 26px;}
}
@media (min-width:768px){
  .section{padding:80px 0;}
  .cat-hero{padding:40px 0 76px;}
  .cat-hero h1{font-size:36px;}
  .cat-hero-lead{font-size:17px;}
  .section-head h2{font-size:28px;}
  .alt-copy h3{font-size:24px;}
  .cta-inner h2{font-size:28px;}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;}
}
@media (min-width:992px){
  body.has-tabbar{padding-bottom:0;}
  .mobile-tabbar{display:none;}
  .nav-desktop{display:flex;}
  .nav-toggle{display:none;}
  .compare-grid{grid-template-columns:repeat(3,1fr);gap:24px;}
  .cat-links{grid-template-columns:repeat(3,1fr);}
  .cta-inner{grid-template-columns:1.6fr 1fr;}
  .cta-actions{justify-content:flex-end;}
  .hero-grid{grid-template-columns:1.55fr 1fr;gap:48px;}
  .cat-hero h1{font-size:42px;}
  .section{padding:96px 0;}
  .alt-row{grid-template-columns:1fr 1fr;gap:56px;}
  .alt-row.is-reverse .alt-media{order:2;}
  .alt-row.is-reverse .alt-copy{order:1;}
  .alt-row + .alt-row{margin-top:72px;}
}
@media (min-width:1200px){
  .container{max-width:1200px;}
  .cat-hero h1{font-size:44px;}
}
@media (max-width:991.98px){
  body.has-tabbar{padding-bottom:78px;}
}
@media (max-width:575.98px){
  .container{padding-left:16px;padding-right:16px;}
  .section{padding:56px 0;}
  .cat-hero{padding:26px 0 54px;}
  .cat-hero h1{font-size:28px;}
  .compare-card.is-featured{transform:none;}
  .compare-card.is-featured:hover{transform:translateY(-2px);}
  .footer-bottom{flex-direction:column;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}