/* roulang page: index */
:root{
  --ink-900:#0B0C12;
  --ink-800:#14161F;
  --ink-700:#1F2230;
  --paper:#F7F6F3;
  --surface:#FFFFFF;
  --line:#E6E3DD;
  --line-dark:rgba(255,255,255,.10);
  --text:#191B22;
  --text-2:#5B5F6C;
  --text-3:#8A8E9A;
  --brand:#6C4CE0;
  --brand-ink:#4530A8;
  --brand-soft:#EFEBFF;
  --accent:#FF6B35;
  --accent-ink:#E0521F;
  --mint:#14B892;
  --star:#FFD25E;
  --danger:#D94B4B;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:24px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,12,18,.04),0 10px 28px -14px rgba(11,12,18,.10);
  --sh-2:0 2px 4px rgba(11,12,18,.05),0 18px 40px -18px rgba(11,12,18,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --block:clamp(64px,8vw,120px);
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease)}
a:hover{color:var(--brand-ink)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
ul{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;font-feature-settings:"tnum" 1}

/* ===== 容器与栅格覆盖 ===== */
.container,
.st-container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1400px){
  .container,.st-container{max-width:1360px}
}
.row{--bs-gutter-x:24px;--bs-gutter-y:24px}
@media (max-width:767.98px){
  .container,.st-container{padding-left:16px;padding-right:16px}
  .row{--bs-gutter-x:16px;--bs-gutter-y:16px}
}

/* ===== 按钮 ===== */
.st-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}
.st-btn:active{transform:translateY(1px)}
.st-btn-accent{
  background:var(--accent);
  color:#fff;
  box-shadow:0 1px 2px rgba(11,12,18,.06),0 12px 26px -14px rgba(255,107,53,.55);
}
.st-btn-accent:hover{background:var(--accent-ink);color:#fff;transform:translateY(-2px);box-shadow:0 0 0 6px rgba(255,107,53,.16),0 16px 30px -14px rgba(255,107,53,.6)}
.st-btn-brand{
  background:var(--brand);
  color:#fff;
}
.st-btn-brand:hover{background:var(--brand-ink);color:#fff;transform:translateY(-2px)}
.st-btn-ghost{
  background:transparent;
  color:#E9E9F0;
  border-color:rgba(255,255,255,.26);
}
.st-btn-ghost:hover{color:#fff;border-color:#fff;background:rgba(255,255,255,.06)}
.st-btn-outline{
  background:transparent;
  color:var(--text);
  border-color:var(--line);
}
.st-btn-outline:hover{border-color:var(--brand);color:var(--brand-ink);background:var(--brand-soft)}
.st-btn-sm{padding:10px 20px;font-size:14px}
.btn{border-radius:var(--r-pill);font-weight:600}
.btn-primary{--bs-btn-bg:var(--brand);--bs-btn-border-color:var(--brand);--bs-btn-hover-bg:var(--brand-ink);--bs-btn-hover-border-color:var(--brand-ink);--bs-btn-active-bg:var(--brand-ink);--bs-btn-active-border-color:var(--brand-ink)}
.btn:focus-visible{box-shadow:0 0 0 3px rgba(108,76,224,.2)}

/* ===== 顶部信息条 ===== */
.st-topbar{
  background:var(--ink-900);
  color:var(--text-3);
  font-size:12.5px;
  letter-spacing:.02em;
  min-height:36px;
}
.st-topbar-inner{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:36px;
  flex-wrap:nowrap;
}
.st-topbar-brand{
  color:#E9E9F0;
  font-weight:600;
  letter-spacing:.04em;
}
.st-topbar-tip{
  color:var(--text-3);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.st-topbar-domain{
  margin-left:auto;
  color:rgba(255,255,255,.42);
  font-variant-numeric:tabular-nums;
  letter-spacing:.06em;
}
.st-topbar-actions{
  display:flex;
  align-items:center;
  gap:14px;
}
.st-topbar-actions a{color:rgba(255,255,255,.66)}
.st-topbar-actions a:hover{color:#fff}
.st-topbar-sep{width:1px;height:14px;background:rgba(255,255,255,.18);display:inline-block}
@media (max-width:767.98px){
  .st-topbar-tip,.st-topbar-domain{display:none}
  .st-topbar-actions{margin-left:auto}
}

/* ===== 主导航 ===== */
.st-header{
  position:sticky;
  top:0;
  z-index:1040;
  background:rgba(247,246,243,.94);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.st-header.is-scrolled{
  border-bottom-color:var(--line);
  background:rgba(247,246,243,.97);
  box-shadow:0 6px 22px -18px rgba(11,12,18,.5);
}
.st-nav-inner{
  display:flex;
  align-items:center;
  gap:28px;
  height:68px;
  transition:height .2s var(--ease);
}
.st-header.is-scrolled .st-nav-inner{height:56px}
.st-logo{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:19px;
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--ink-900);
  white-space:nowrap;
}
.st-logo:hover{color:var(--ink-900)}
.st-logo-dot{
  width:10px;
  height:10px;
  border-radius:50%;
  background:var(--brand);
  box-shadow:0 0 0 4px rgba(108,76,224,.14);
  flex:none;
}
.st-nav-list{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:8px;
}
.st-nav-link{
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  font-weight:500;
  color:var(--text-2);
  border-radius:var(--r-sm);
  position:relative;
}
.st-nav-link:hover{color:var(--ink-900)}
.st-nav-link.is-active{color:var(--ink-900);font-weight:600}
.st-nav-link.is-active::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:-2px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
}
.st-nav-right{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:10px;
}
.st-icon-btn{
  width:40px;
  height:40px;
  border-radius:50%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--text-2);
  border:1px solid var(--line);
  background:var(--surface);
}
.st-icon-btn:hover{color:var(--brand-ink);border-color:var(--brand);background:var(--brand-soft)}
.st-burger{
  display:none;
  width:40px;
  height:40px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--ink-900);
  align-items:center;
  justify-content:center;
}
@media (max-width:991.98px){
  .st-nav-list,.st-nav-right .st-btn{display:none}
  .st-burger{display:inline-flex}
}

/* 移动端抽屉 */
.st-drawer{
  position:fixed;
  inset:0;
  z-index:1060;
  background:var(--ink-900);
  transform:translateX(100%);
  transition:transform .28s var(--ease);
  display:flex;
  flex-direction:column;
  padding:22px 22px 28px;
  overflow-y:auto;
}
.st-drawer.is-open{transform:translateX(0)}
.st-drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}
.st-drawer-top .st-logo{color:#fff}
.st-drawer-close{
  width:42px;height:42px;border-radius:var(--r-sm);
  border:1px solid var(--line-dark);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
}
.st-drawer-list{display:flex;flex-direction:column;gap:6px;flex:1}
.st-drawer-list a{
  color:#E9E9F0;
  font-size:22px;
  font-weight:700;
  padding:14px 0;
  border-bottom:1px solid var(--line-dark);
}
.st-drawer-list a:hover,.st-drawer-list a.is-active{color:var(--brand-soft)}
.st-drawer-cta{margin-top:24px}

/* ===== Hero ===== */
.st-hero{
  position:relative;
  background:var(--ink-900);
  color:#E9E9F0;
  padding:clamp(48px,7vw,92px) 0 clamp(56px,8vw,104px);
  overflow:hidden;
}
.st-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    radial-gradient(circle at 12% 22%, rgba(255,255,255,.05) 0 1px, transparent 1.6px),
    radial-gradient(circle at 68% 12%, rgba(255,255,255,.045) 0 1px, transparent 1.6px),
    radial-gradient(circle at 84% 62%, rgba(255,255,255,.04) 0 1px, transparent 1.6px),
    radial-gradient(circle at 32% 78%, rgba(255,255,255,.035) 0 1px, transparent 1.6px),
    repeating-linear-gradient(115deg, rgba(255,255,255,.022) 0 1px, transparent 1px 46px);
  pointer-events:none;
}
.st-hero-inner{position:relative;z-index:2}
.st-hero-copy{max-width:620px}
.st-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  letter-spacing:.06em;
  color:#C9C6F1;
  background:rgba(108,76,224,.20);
  border:1px solid rgba(108,76,224,.42);
  border-radius:var(--r-pill);
  padding:6px 14px;
  margin-bottom:22px;
}
.st-hero h1{
  font-size:clamp(34px,5.2vw,68px);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.02em;
  color:#fff;
}
.st-hero h1 em{
  font-style:normal;
  color:#C6BBFF;
}
.st-hero-sub{
  margin-top:20px;
  font-size:clamp(15px,1.35vw,17px);
  line-height:1.8;
  color:#B9BAC6;
  max-width:560px;
}
.st-hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:32px;
}
.st-trust{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 26px;
  margin-top:34px;
  padding-top:24px;
  border-top:1px solid var(--line-dark);
  font-size:13.5px;
  color:#9A9CA9;
}
.st-trust b{
  color:#fff;
  font-size:17px;
  font-weight:700;
  margin-right:6px;
  font-variant-numeric:tabular-nums;
}
.st-trust .st-mint{color:var(--mint)}
.st-hero-visual{
  display:flex;
  justify-content:center;
  align-items:center;
}
.st-phone{
  position:relative;
  width:min(380px,86vw);
  aspect-ratio:9/16;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line-dark);
  box-shadow:0 40px 80px -40px rgba(0,0,0,.85);
  animation:stBreath 6s ease-in-out infinite;
}
.st-phone img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.st-phone::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(11,12,18,.55) 0%,rgba(11,12,18,.12) 38%,rgba(11,12,18,.82) 100%);
}
.st-phone-brand{
  position:absolute;
  top:18px;
  left:20px;
  z-index:2;
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  color:#fff;
  display:inline-flex;
  align-items:center;
  gap:7px;
}
.st-phone-brand i{color:#C6BBFF;font-size:11px}
.st-phone-tag{
  position:absolute;
  right:18px;
  bottom:20px;
  z-index:2;
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(11,12,18,.62);
  border:1px solid var(--line-dark);
  border-radius:var(--r-pill);
  padding:7px 14px;
  font-size:12.5px;
  color:#E9E9F0;
  font-variant-numeric:tabular-nums;
}
.st-phone-tag i{color:var(--accent);font-size:11px}
@keyframes stBreath{
  0%,100%{transform:translateY(-6px)}
  50%{transform:translateY(6px)}
}
@media (max-width:991.98px){
  .st-hero-visual{margin-top:44px}
  .st-hero-copy{max-width:none}
}

/* ===== 通用板块 ===== */
.st-section{padding:var(--block) 0}
.st-section-alt{background:var(--surface)}
.st-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:32px;
}
.st-head h2{
  font-size:clamp(22px,2.6vw,32px);
  font-weight:700;
  letter-spacing:-.02em;
}
.st-head .st-kicker{
  display:block;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--brand);
  font-weight:600;
  margin-bottom:8px;
}
.st-head p{
  margin-top:10px;
  font-size:14.5px;
  color:var(--text-2);
  max-width:560px;
}
.st-link-arrow{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:14.5px;
  font-weight:600;
  color:var(--brand-ink);
  white-space:nowrap;
}
.st-link-arrow i{transition:transform .2s var(--ease);font-size:12px}
.st-link-arrow:hover i{transform:translateX(4px)}
@media (max-width:575.98px){
  .st-head{flex-direction:column;align-items:flex-start;gap:14px}
}

/* ===== 横滑卡带 ===== */
.st-rail-wrap{position:relative}
.st-rail{
  display:flex;
  gap:16px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:6px 2px 14px;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.st-rail::-webkit-scrollbar{display:none}
.st-clip{
  position:relative;
  flex:0 0 auto;
  width:236px;
  aspect-ratio:9/16;
  border-radius:20px;
  overflow:hidden;
  border:1px solid var(--line);
  scroll-snap-align:start;
  background:var(--ink-800);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.st-clip img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .35s var(--ease);
}
.st-clip::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(11,12,18,.28) 0%,rgba(11,12,18,0) 34%,rgba(11,12,18,.86) 100%);
}
.st-clip:hover{
  transform:translateY(-4px);
  border-color:var(--brand);
  box-shadow:var(--sh-2);
  color:inherit;
}
.st-clip:hover img{transform:scale(1.04)}
.st-clip-play{
  position:absolute;
  top:14px;
  left:14px;
  z-index:2;
  width:32px;
  height:32px;
  border-radius:50%;
  background:rgba(11,12,18,.5);
  border:1px solid var(--line-dark);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  font-size:11px;
}
.st-clip-time{
  position:absolute;
  right:12px;
  bottom:12px;
  z-index:2;
  font-size:12px;
  color:#fff;
  background:rgba(11,12,18,.68);
  border-radius:var(--r-pill);
  padding:3px 9px;
  font-variant-numeric:tabular-nums;
}
.st-clip-title{
  position:absolute;
  left:14px;
  right:60px;
  bottom:14px;
  z-index:2;
  font-size:14.5px;
  font-weight:600;
  color:#fff;
  line-height:1.45;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
@media (max-width:575.98px){
  .st-clip{width:186px}
}

/* ===== 种草清单 ===== */
.st-list{border-top:1px solid var(--line)}
.st-list-item{
  display:flex;
  align-items:center;
  gap:22px;
  padding:24px 20px 24px 8px;
  border-bottom:1px solid var(--line);
  transition:background-color .2s var(--ease),padding-left .2s var(--ease);
}
.st-list-item:hover{background:var(--brand-soft);padding-left:16px}
.st-list-num{
  flex:0 0 auto;
  font-size:clamp(34px,4.4vw,54px);
  font-weight:800;
  line-height:1;
  color:transparent;
  -webkit-text-stroke:1px rgba(108,76,224,.55);
  font-variant-numeric:tabular-nums;
  min-width:74px;
}
.st-list-body{flex:1;min-width:0}
.st-list-body h3{font-size:17.5px;font-weight:600}
.st-list-body p{font-size:14px;color:var(--text-2);margin-top:4px}
.st-list-item > i{
  color:var(--text-3);
  font-size:13px;
  transition:transform .2s var(--ease),color .2s var(--ease);
}
.st-list-item:hover > i{transform:translateX(4px);color:var(--brand)}
.st-list-foot{margin-top:28px}

/* ===== 口碑条 ===== */
.st-stats{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  padding-bottom:34px;
  margin-bottom:34px;
  border-bottom:1px solid var(--line);
}
.st-stat b{
  display:block;
  font-size:clamp(28px,3vw,36px);
  font-weight:800;
  letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
  line-height:1.1;
}
.st-stat span{
  display:block;
  margin-top:6px;
  font-size:13.5px;
  color:var(--text-2);
}
.st-stat .st-tag-mint{
  display:inline-block;
  margin-top:8px;
  font-size:12px;
  color:var(--mint);
  background:rgba(20,184,146,.12);
  border-radius:var(--r-pill);
  padding:2px 10px;
}
.st-quote{
  flex:0 0 auto;
  width:284px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:20px;
  scroll-snap-align:start;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.st-quote:hover{border-color:var(--brand);box-shadow:var(--sh-1);transform:translateY(-2px)}
.st-quote-head{display:flex;align-items:center;gap:10px}
.st-avatar{
  width:36px;height:36px;
  border-radius:50%;
  background:var(--brand-soft);
  color:var(--brand-ink);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:14px;
  font-weight:700;
  flex:none;
}
.st-quote-name{font-size:14px;font-weight:600}
.st-stars{color:var(--star);font-size:12px;letter-spacing:1px;margin-left:auto}
.st-quote p{
  margin-top:12px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
@media (max-width:767.98px){
  .st-stats{grid-template-columns:repeat(2,1fr);gap:20px}
  .st-quote{width:250px}
}

/* ===== 跟买 CTA ===== */
.st-cta-block{
  background:var(--surface);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:clamp(40px,5vw,64px) 0;
}
.st-cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.st-cta-inner h2{font-size:clamp(22px,2.6vw,32px);letter-spacing:-.02em}
.st-cta-inner p{margin-top:10px;font-size:15px;color:var(--text-2)}
@media (max-width:767.98px){
  .st-cta-inner{flex-direction:column;align-items:flex-start;gap:22px}
  .st-cta-inner .st-btn{width:100%}
}

/* ===== 资讯卡片 ===== */
.st-news-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.st-news-card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.st-news-card:hover{
  transform:translateY(-3px);
  border-color:var(--brand);
  box-shadow:var(--sh-2);
  color:inherit;
}
.st-news-cover{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--ink-700);
}
.st-news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.st-news-card:hover .st-news-cover img{transform:scale(1.03)}
.st-badge{
  display:inline-flex;
  align-items:center;
  gap:5px;
  position:absolute;
  top:12px;
  left:12px;
  background:var(--brand-soft);
  color:var(--brand-ink);
  font-size:12px;
  font-weight:600;
  border-radius:var(--r-pill);
  padding:4px 12px;
}
.st-news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.st-news-body h3{
  font-size:17.5px;
  font-weight:600;
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.st-news-body p{
  margin-top:10px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.st-news-foot{
  margin-top:auto;
  padding-top:16px;
  margin-top:18px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
  color:var(--text-3);
}
.st-news-foot time{font-variant-numeric:tabular-nums}
.st-news-foot span{color:var(--brand-ink);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.st-news-card:hover .st-news-foot span i{transform:translateX(4px)}
.st-news-foot span i{transition:transform .2s var(--ease);font-size:11px}
.st-empty{
  border:1px dashed var(--line);
  border-radius:var(--r-md);
  min-height:200px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:14px;
  color:var(--text-2);
  font-size:15px;
  text-align:center;
  padding:32px;
}
@media (max-width:991.98px){
  .st-news-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:575.98px){
  .st-news-grid{grid-template-columns:1fr}
}

/* ===== FAQ ===== */
.st-faq{border-top:1px solid var(--line)}
.st-faq .accordion-item{
  background:transparent;
  border:0;
  border-bottom:1px solid var(--line);
  border-radius:0;
}
.st-faq .accordion-button{
  background:transparent;
  color:var(--text);
  font-size:17px;
  font-weight:600;
  padding:22px 40px 22px 4px;
  box-shadow:none;
  border-radius:0;
  line-height:1.5;
}
.st-faq .accordion-button:not(.collapsed){color:var(--brand);background:transparent;box-shadow:none}
.st-faq .accordion-button::after{
  background-image:none;
  content:"\2b";
  font-family:var(--font);
  font-size:20px;
  font-weight:400;
  color:var(--text-3);
  width:22px;
  height:22px;
  line-height:22px;
  text-align:center;
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.st-faq .accordion-button:not(.collapsed)::after{
  transform:rotate(45deg);
  color:var(--brand);
}
.st-faq .accordion-button:focus{box-shadow:none;outline:2px solid var(--brand);outline-offset:-2px}
.st-faq .accordion-body{
  padding:0 60px 24px 4px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
}

/* ===== 页脚 ===== */
.st-footer{
  background:var(--ink-900);
  color:rgba(255,255,255,.66);
  padding:clamp(52px,6vw,80px) 0 0;
  border-top:1px solid var(--line-dark);
  font-size:13.5px;
}
.st-footer h4{
  color:#fff;
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  margin-bottom:16px;
}
.st-footer p{color:rgba(255,255,255,.6);line-height:1.8}
.st-footer-logo{
  display:inline-flex;
  align-items:center;
  gap:9px;
  color:#fff;
  font-size:18px;
  font-weight:800;
  letter-spacing:-.02em;
  margin-bottom:16px;
}
.st-footer-links{display:flex;flex-direction:column;gap:11px}
.st-footer-links a{color:rgba(255,255,255,.66)}
.st-footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.st-footer-meta{display:flex;flex-direction:column;gap:11px}
.st-footer-meta span{color:rgba(255,255,255,.6)}
.st-sub-form{display:flex;gap:10px;margin-top:4px}
.st-sub-form input{
  flex:1;
  min-width:0;
  height:48px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.16);
  background:var(--ink-800);
  color:#fff;
  padding:0 14px;
  font-size:14px;
  font-family:var(--font);
}
.st-sub-form input::placeholder{color:rgba(255,255,255,.38)}
.st-sub-form input:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(108,76,224,.22);
}
.st-sub-form button{
  height:48px;
  padding:0 20px;
  border-radius:12px;
  background:var(--accent);
  color:#fff;
  font-weight:600;
  font-size:14px;
  flex:none;
  transition:background-color .2s var(--ease),transform .16s var(--ease);
}
.st-sub-form button:hover{background:var(--accent-ink)}
.st-sub-form button:active{transform:translateY(1px)}
.st-form-tip{margin-top:10px;font-size:12.5px;color:rgba(255,255,255,.42)}
.st-footer-bottom{
  margin-top:clamp(40px,5vw,64px);
  border-top:1px solid var(--line-dark);
  padding:22px 0 26px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  font-size:12px;
  color:var(--text-3);
  flex-wrap:wrap;
}
@media (max-width:767.98px){
  .st-footer-grid > div{margin-bottom:24px}
  .st-sub-form{flex-direction:column}
  .st-sub-form button{width:100%}
}

/* ===== 入场动效 ===== */
.st-reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.st-reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .st-reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --ink-900:#0B0C12; --ink-800:#14161F; --ink-700:#1F2230;
  --paper:#F7F6F3; --surface:#FFFFFF;
  --line:#E6E3DD; --line-dark:rgba(255,255,255,.10);
  --text:#191B22; --text-2:#5B5F6C; --text-3:#8A8E9A;
  --brand:#6C4CE0; --brand-ink:#4530A8; --brand-soft:#EFEBFF;
  --accent:#FF6B35; --accent-ink:#E0521F;
  --mint:#14B892; --star:#FFD25E;
  --r-sm:10px; --r-md:16px; --r-lg:24px; --r-pill:999px;
  --shadow-1:0 1px 2px rgba(11,12,18,.04), 0 10px 28px -14px rgba(11,12,18,.10);
  --shadow-2:0 2px 4px rgba(11,12,18,.05), 0 18px 40px -18px rgba(11,12,18,.16);
  --ease:160ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--text);
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body.st-lock{overflow:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease)}
button,input{font:inherit}
h1,h2,h3,h4,p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{max-width:1280px;width:100%;margin:0 auto;padding-left:24px;padding-right:24px}
@media (max-width:767px){.container{padding-left:16px;padding-right:16px}}

/* ============ 顶部信息条 ============ */
.st-topbar{background:var(--ink-900);color:var(--text-3);font-size:12.5px;letter-spacing:.02em}
.st-topbar-inner{display:flex;align-items:center;gap:16px;height:36px}
.st-topbar-brand{color:#cfd0da;white-space:nowrap}
.st-topbar-mid{margin-inline:auto;color:#71747f;font-variant-numeric:tabular-nums}
.st-topbar-links{display:flex;align-items:center;gap:12px;white-space:nowrap}
.st-topbar-links a{color:#b9bac6}
.st-topbar-links a:hover{color:#fff}
.st-topbar-sep{width:1px;height:12px;background:rgba(255,255,255,.18)}
@media (max-width:767px){.st-topbar-mid{display:none}.st-topbar-brand{font-size:12px}}

/* ============ 导航 ============ */
.st-header{position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.94);backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid transparent;transition:border-color var(--ease),box-shadow var(--ease)}
.st-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 10px 26px -22px rgba(11,12,18,.45)}
.st-nav-inner{display:flex;align-items:center;height:68px;gap:14px;transition:height var(--ease)}
.st-header.is-stuck .st-nav-inner{height:56px}
.st-logo{display:inline-flex;align-items:center;gap:9px;font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--ink-900);white-space:nowrap}
.st-logo-dot{width:11px;height:11px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(108,76,224,.14);flex:none}
.st-nav-list{display:flex;align-items:center;gap:2px;margin-left:26px}
.st-nav-link{position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:var(--text-2);border-radius:var(--r-pill);transition:color var(--ease),background-color var(--ease)}
.st-nav-link:hover{color:var(--ink-900);background:var(--brand-soft)}
.st-nav-link.is-active{color:var(--ink-900);font-weight:600}
.st-nav-link.is-active::after{content:"";position:absolute;left:50%;bottom:-2px;width:20px;height:2px;border-radius:2px;background:var(--brand);transform:translateX(-50%)}
.st-nav-right{display:flex;align-items:center;gap:10px;margin-left:auto}
.st-icon-btn{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--text-2);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--ease)}
.st-icon-btn:hover{color:var(--brand);border-color:var(--brand);background:var(--brand-soft)}
.st-burger{display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:#fff;color:var(--ink-900);cursor:pointer}
.st-burger:hover{border-color:var(--brand);color:var(--brand)}

/* ============ 按钮 ============ */
.st-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-pill);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:background-color var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease)}
.st-btn-sm{height:38px;padding:0 16px;font-size:14px}
.st-btn-accent{background:var(--accent);color:#fff}
.st-btn-accent:hover{background:var(--accent-ink);color:#fff;box-shadow:0 12px 26px -14px rgba(255,107,53,.75)}
.st-btn-brand{background:var(--brand);color:#fff}
.st-btn-brand:hover{background:var(--brand-ink);color:#fff;box-shadow:0 12px 26px -14px rgba(108,76,224,.8)}
.st-btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}
.st-btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.st-btn:active{transform:translateY(1px)}
.btn{border-radius:var(--r-pill);font-weight:600;box-shadow:none}
.btn:focus,.btn:focus-visible{box-shadow:0 0 0 3px rgba(108,76,224,.16)}

/* ============ 移动抽屉 ============ */
.st-drawer{position:fixed;inset:0;z-index:1080;background:rgba(11,12,18,.5);opacity:0;visibility:hidden;transition:opacity .2s ease-out,visibility .2s ease-out}
.st-drawer.is-open{opacity:1;visibility:visible}
.st-drawer-panel{position:absolute;top:0;right:0;width:min(86vw,360px);height:100%;background:#fff;padding:20px 22px 28px;display:flex;flex-direction:column;transform:translateX(100%);transition:transform .24s ease-out;overflow-y:auto}
.st-drawer.is-open .st-drawer-panel{transform:none}
.st-drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
.st-drawer-logo{display:inline-flex;align-items:center;gap:9px;font-size:18px;font-weight:800;color:var(--ink-900)}
.st-drawer-close{width:38px;height:38px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--text-2);cursor:pointer}
.st-drawer-close:hover{color:var(--brand);border-color:var(--brand)}
.st-drawer-list{display:flex;flex-direction:column;gap:4px;margin-bottom:auto}
.st-drawer-list a{display:block;padding:14px 4px;font-size:19px;font-weight:600;color:var(--ink-900);border-bottom:1px solid var(--line)}
.st-drawer-list a:hover{color:var(--brand)}
.st-drawer-cta{width:100%;margin-top:24px}

/* ============ 面包屑 ============ */
.st-crumb{padding:22px 0 4px;font-size:13px;color:var(--text-3)}
.st-crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.st-crumb li{display:flex;align-items:center;gap:8px;min-width:0}
.st-crumb li+li::before{content:"/";color:#c9c6bf}
.st-crumb a{color:var(--text-2)}
.st-crumb a:hover{color:var(--brand)}
.st-crumb .is-current{display:block;max-width:42vw;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--text-3)}

/* ============ 正文头 ============ */
.st-article-head{padding:14px 0 26px;border-bottom:1px solid var(--line)}
.st-badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:600;letter-spacing:.02em}
.st-article-title{margin:16px 0 18px;font-size:clamp(28px,4vw,44px);line-height:1.2;font-weight:800;letter-spacing:-.02em;color:var(--ink-900)}
.st-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums}
.st-meta i{color:var(--brand);margin-right:6px;font-size:12px}
.st-layout{padding:clamp(28px,4vw,44px) 0 0}

/* ============ 正文排版 ============ */
.st-article-body{font-size:16.5px;line-height:1.9;color:var(--text);max-width:74ch}
.st-article-body>*:first-child{margin-top:0}
.st-article-body h2{margin:2.1em 0 .75em;font-size:clamp(21px,2.4vw,27px);font-weight:700;line-height:1.4;color:var(--ink-900);padding-left:14px;border-left:3px solid var(--brand)}
.st-article-body h3{margin:1.7em 0 .6em;font-size:19px;font-weight:600;line-height:1.5;color:var(--ink-900)}
.st-article-body h4{margin:1.4em 0 .5em;font-size:17px;font-weight:600;color:var(--ink-800)}
.st-article-body p{margin:0 0 1.15em}
.st-article-body ul{list-style:disc;padding-left:1.4em;margin:0 0 1.25em}
.st-article-body ol{list-style:decimal;padding-left:1.4em;margin:0 0 1.25em}
.st-article-body li{margin:.45em 0}
.st-article-body ul li::marker{color:var(--brand)}
.st-article-body ol li::marker{color:var(--brand);font-variant-numeric:tabular-nums}
.st-article-body a{color:var(--brand-ink);border-bottom:1px solid rgba(108,76,224,.32)}
.st-article-body a:hover{color:var(--brand);border-bottom-color:var(--brand)}
.st-article-body blockquote{margin:1.6em 0;padding:18px 22px;background:var(--brand-soft);border-left:3px solid var(--brand);border-radius:0 var(--r-sm) var(--r-sm) 0;color:#332d55}
.st-article-body blockquote p:last-child{margin-bottom:0}
.st-article-body img{border-radius:var(--r-md);margin:1.5em 0;box-shadow:var(--shadow-1)}
.st-article-body figure{margin:1.6em 0}
.st-article-body figcaption{margin-top:8px;font-size:13px;color:var(--text-3);text-align:center}
.st-article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}
.st-article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px}
.st-article-body th,.st-article-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.st-article-body th{background:#FBFAF8;font-weight:600;color:var(--ink-900)}
.st-article-body code{background:#F0EEE9;border-radius:6px;padding:2px 6px;font-size:14px}
.st-empty{border:1px dashed var(--line);background:#fff;border-radius:var(--r-md);padding:52px 24px;text-align:center}
.st-empty h2{font-size:22px;font-weight:700;color:var(--ink-900);margin-bottom:12px}
.st-empty p{color:var(--text-2);max-width:46ch;margin:0 auto 22px}

/* ============ 侧栏 ============ */
.st-side{display:flex;flex-direction:column;gap:20px}
@media (min-width:992px){.st-side{position:sticky;top:92px}}
.st-side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:20px;box-shadow:var(--shadow-1)}
.st-side-title{font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--text-3);margin-bottom:12px}
.st-side-brand{display:inline-flex;align-items:center;gap:9px;font-size:17px;font-weight:800;color:var(--ink-900)}
.st-side-desc{margin:12px 0 16px;font-size:13.5px;line-height:1.78;color:var(--text-2)}
.st-side-stats{display:flex;gap:20px;border-top:1px solid var(--line);padding-top:14px}
.st-side-stat b{display:block;font-size:21px;font-weight:800;line-height:1.3;color:var(--ink-900);font-variant-numeric:tabular-nums}
.st-side-stat b em{font-style:normal;font-size:12px;color:var(--mint);font-weight:600;margin-left:2px}
.st-side-stat span{font-size:12px;color:var(--text-3)}
.st-side-list a{display:flex;align-items:center;gap:10px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14.5px;color:var(--text-2)}
.st-side-list li:last-child a{border-bottom:0}
.st-side-list a:hover{color:var(--brand)}
.st-side-list i{font-size:11px;color:var(--brand);opacity:.75;width:14px;text-align:center}
.st-side-list .st-side-arrow{margin-left:auto;font-size:11px;color:var(--text-3);transition:transform var(--ease);opacity:1}
.st-side-list a:hover .st-side-arrow{transform:translateX(4px);color:var(--brand)}
.st-side-cta{background:var(--brand-soft);border-color:rgba(108,76,224,.18)}
.st-side-cta h3{font-size:16px;font-weight:700;color:var(--brand-ink);margin-bottom:8px}
.st-side-cta p{font-size:13.5px;line-height:1.78;color:#4B4470;margin-bottom:14px}

/* ============ 板块与卡片 ============ */
.st-block{margin-top:clamp(48px,6vw,80px)}
.st-block-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:24px}
.st-h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;letter-spacing:-.01em;color:var(--ink-900);line-height:1.3}
.st-textlink{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand)}
.st-textlink i{font-size:11px;transition:transform var(--ease)}
.st-textlink:hover{color:var(--brand-ink)}
.st-textlink:hover i{transform:translateX(4px)}
.st-card{display:flex;flex-direction:column;height:100%;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--shadow-1);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out}
.st-card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow-2)}
.st-card-cover{position:relative;aspect-ratio:16/10;overflow:hidden;background:#EDEBE6}
.st-card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}
.st-card:hover .st-card-cover img{transform:scale(1.03)}
.st-card-badge{position:absolute;left:12px;top:12px;display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);background:rgba(255,255,255,.94);color:var(--brand);font-size:12px;font-weight:600}
.st-card-body{display:flex;flex-direction:column;gap:10px;padding:18px 20px 20px;flex:1}
.st-card-body h3{font-size:17px;font-weight:600;line-height:1.5;color:var(--ink-900);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.st-card-body p{font-size:14px;line-height:1.7;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.st-card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:12px;border-top:1px solid var(--line);font-size:12.5px;color:var(--text-3);font-variant-numeric:tabular-nums}
.st-card-foot span:last-child{color:var(--brand);font-weight:600}
.st-card:hover .st-card-body h3{color:var(--brand-ink)}

/* ============ 文末 ============ */
.st-readfoot{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:clamp(40px,5vw,64px);padding-top:24px;border-top:1px solid var(--line)}
.st-back-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--text-2)}
.st-back-link i{transition:transform var(--ease)}
.st-back-link:hover{color:var(--brand)}
.st-back-link:hover i{transform:translateX(-4px)}

/* ============ 折叠面板 ============ */
.accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent}
.accordion-button{background:transparent;box-shadow:none;padding:20px 0;font-size:17px;font-weight:600;color:var(--ink-900);border-radius:0!important}
.accordion-button:not(.collapsed){background:transparent;color:var(--brand);box-shadow:none}
.accordion-button:focus{box-shadow:none;border-color:transparent}
.accordion-button::after{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%236C4CE0'%3E%3Cpath d='M8 2a.75.75 0 0 1 .75.75v4.5h4.5a.75.75 0 0 1 0 1.5h-4.5v4.5a.75.75 0 0 1-1.5 0v-4.5h-4.5a.75.75 0 0 1 0-1.5h4.5v-4.5A.75.75 0 0 1 8 2z'/%3E%3C/svg%3E");background-size:16px;transition:transform var(--ease)}
.accordion-button:not(.collapsed)::after{transform:rotate(45deg)}
.accordion-body{padding:0 0 22px;font-size:15px;line-height:1.85;color:var(--text-2)}
.card{border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-1)}
.form-control{border-radius:12px;border-color:var(--line);min-height:48px;font-size:15px}
.form-control:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(108,76,224,.12)}

/* ============ 页脚 ============ */
.st-footer{margin-top:clamp(64px,8vw,120px);background:var(--ink-900);color:rgba(255,255,255,.66);font-size:14px;padding-top:64px;border-top:1px solid var(--line-dark)}
.st-footer-grid{--bs-gutter-x:2rem;row-gap:32px}
.st-footer h4{font-size:14px;font-weight:700;color:#fff;letter-spacing:.02em;margin-bottom:16px}
.st-footer-logo{display:inline-flex;align-items:center;gap:9px;font-size:18px;font-weight:800;color:#fff;margin-bottom:14px}
.st-footer p{color:rgba(255,255,255,.6);line-height:1.85;max-width:36ch}
.st-footer-links{display:flex;flex-direction:column;gap:10px}
.st-footer-links a{color:rgba(255,255,255,.66);width:fit-content}
.st-footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.st-footer-meta{display:flex;flex-direction:column;gap:10px;color:rgba(255,255,255,.6);font-variant-numeric:tabular-nums}
.st-sub-form{display:flex;gap:8px;margin-bottom:10px}
.st-sub-form label{display:none}
.st-sub-form input{flex:1;min-width:0;height:48px;padding:0 14px;border-radius:12px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);color:#fff;font-size:14px}
.st-sub-form input::placeholder{color:rgba(255,255,255,.42)}
.st-sub-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(108,76,224,.24)}
.st-sub-form button{height:48px;padding:0 18px;border:0;border-radius:12px;background:var(--accent);color:#fff;font-size:14px;font-weight:600;white-space:nowrap;cursor:pointer;transition:background-color var(--ease)}
.st-sub-form button:hover{background:var(--accent-ink)}
.st-form-tip{font-size:12.5px;color:rgba(255,255,255,.45)}
.st-footer-bottom{margin-top:48px;padding:22px 0;border-top:1px solid var(--line-dark);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:12px;color:rgba(255,255,255,.45);font-variant-numeric:tabular-nums}

/* ============ 动效 ============ */
.st-reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease-out,transform .5s ease-out}
.st-reveal.is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:991px){
  .st-nav-list{display:none}
  .st-burger{display:inline-flex;align-items:center;justify-content:center}
  .st-article-body{max-width:none}
  .st-side{margin-top:8px}
}
@media (max-width:767px){
  .st-nav-inner{height:60px}
  .st-logo{font-size:17px}
  .st-nav-right .st-btn{display:none}
  .st-crumb .is-current{max-width:56vw}
  .st-readfoot{flex-direction:column;align-items:stretch}
  .st-readfoot .st-btn{width:100%}
}
@media (max-width:575px){
  .st-sub-form{flex-direction:column}
  .st-sub-form button{width:100%}
  .st-article-body{font-size:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .st-reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --ink-900:#0B0C12;
  --ink-800:#14161F;
  --ink-700:#1F2230;
  --paper:#F7F6F3;
  --surface:#FFFFFF;
  --line:#E6E3DD;
  --text:#191B22;
  --text-2:#5B5F6C;
  --text-3:#8A8E9A;
  --brand:#6C4CE0;
  --brand-ink:#4530A8;
  --brand-soft:#EFEBFF;
  --accent:#FF6B35;
  --accent-ink:#E0521F;
  --mint:#14B892;
  --star:#FFD25E;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:24px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,12,18,.04), 0 10px 28px -14px rgba(11,12,18,.10);
  --sh-2:0 2px 4px rgba(11,12,18,.05), 0 18px 40px -18px rgba(11,12,18,.16);
  --ease:160ms ease-out;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--ease);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.28;color:var(--text);}
p{margin:0 0 16px;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
figure{margin:0;}

.container,.container-lg,.container-md,.container-sm,.container-xl,.container-xxl{
  max-width:1280px;
  padding-left:24px;
  padding-right:24px;
  margin-left:auto;
  margin-right:auto;
}
@media (min-width:1400px){
  .container,.container-lg,.container-md,.container-sm,.container-xl,.container-xxl{max-width:1360px;}
}
.row{--bs-gutter-x:24px;--bs-gutter-y:24px;}
@media (max-width:767.98px){
  .container,.container-lg,.container-md,.container-sm,.container-xl,.container-xxl{padding-left:16px;padding-right:16px;}
  .row{--bs-gutter-x:16px;--bs-gutter-y:16px;}
}

/* ---------- 按钮 ---------- */
.st-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:background var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease),opacity var(--ease);
}
.st-btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.st-btn:active{transform:translateY(1px);}
.st-btn-accent{background:var(--accent);color:#fff;}
.st-btn-accent:hover{background:var(--accent-ink);color:#fff;box-shadow:0 0 0 6px rgba(255,107,53,.22);}
.st-btn-ghost{background:transparent;color:#E9E9F0;border-color:rgba(255,255,255,.28);}
.st-btn-ghost:hover{color:#fff;border-color:rgba(255,255,255,.72);background:rgba(255,255,255,.08);}
.st-btn-light{background:var(--surface);color:var(--text);border-color:var(--line);}
.st-btn-light:hover{border-color:var(--brand);color:var(--brand-ink);box-shadow:var(--sh-1);}
.st-btn-sm{height:38px;padding:0 16px;font-size:14px;}

/* ---------- 顶部信息条 ---------- */
.st-header{position:relative;z-index:1030;}
.st-topbar{
  background:var(--ink-900);
  color:var(--text-3);
  height:36px;
  display:flex;
  align-items:center;
  font-size:12.5px;
  letter-spacing:.02em;
}
.st-topbar-inner{display:flex;align-items:center;gap:20px;width:100%;}
.st-topbar-brand{color:#C9CAD6;font-weight:600;}
.st-topbar-mid{color:var(--text-3);}
.st-topbar-actions{margin-left:auto;display:flex;align-items:center;gap:0;}
.st-topbar-actions a{color:#C9CAD6;padding:0 14px;}
.st-topbar-actions a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.st-topbar-actions a+a{border-left:1px solid rgba(255,255,255,.14);}
@media (max-width:767.98px){
  .st-topbar-mid{display:none;}
  .st-topbar{font-size:12px;}
  .st-topbar-actions a{padding:0 10px;}
}

/* ---------- 主导航 ---------- */
.st-nav{
  position:sticky;
  top:0;
  z-index:1020;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid transparent;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.st-nav.is-scrolled{border-bottom-color:var(--line);box-shadow:0 8px 24px -20px rgba(11,12,18,.4);}
.st-nav-inner{display:flex;align-items:center;gap:28px;height:68px;transition:height var(--ease);}
.st-nav.is-scrolled .st-nav-inner{height:56px;}
.st-logo{display:inline-flex;align-items:center;gap:9px;font-size:19px;font-weight:800;letter-spacing:-.02em;color:var(--ink-900);}
.st-logo-dot{
  width:10px;height:10px;border-radius:50%;
  background:var(--brand);
  box-shadow:0 0 0 4px rgba(108,76,224,.12);
  flex:none;
}
.st-nav-list{display:flex;align-items:center;gap:4px;margin:0 auto;}
.st-nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  border-radius:var(--r-sm);
  font-size:15px;
  font-weight:600;
  color:var(--text-2);
  transition:color var(--ease),background var(--ease);
}
.st-nav-link:hover{color:var(--ink-900);background:var(--brand-soft);}
.st-nav-link.is-active{color:var(--ink-900);}
.st-nav-link.is-active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;border-radius:2px;
  background:var(--brand);
}
.st-nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;}
.st-icon-btn{
  width:38px;height:38px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--text-2);
  cursor:pointer;
  transition:color var(--ease),border-color var(--ease),background var(--ease);
}
.st-icon-btn:hover{color:var(--brand);border-color:var(--brand);background:var(--brand-soft);}
.st-icon-btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.st-burger{
  display:none;
  width:38px;height:38px;
  align-items:center;justify-content:center;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--ink-900);
  cursor:pointer;
}
.st-burger:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.st-nav-drawer-cta{display:none;}
body.st-lock{overflow:hidden;}

@media (max-width:991.98px){
  .st-nav-list{
    position:fixed;
    inset:0;
    z-index:1060;
    margin:0;
    padding:92px 24px 32px;
    flex-direction:column;
    align-items:flex-start;
    justify-content:flex-start;
    gap:4px;
    background:var(--ink-900);
    transform:translateX(-100%);
    transition:transform 280ms ease-out;
    overflow-y:auto;
  }
  .st-nav-list.is-open{transform:none;}
  .st-nav-link{
    width:100%;
    font-size:21px;
    color:#E9E9F0;
    padding:13px 8px;
    border-radius:8px;
  }
  .st-nav-link:hover{color:#fff;background:rgba(255,255,255,.06);}
  .st-nav-link.is-active{color:#fff;}
  .st-nav-link.is-active::after{left:8px;right:auto;width:26px;bottom:6px;}
  .st-burger{display:inline-flex;}
  .st-nav-right .st-btn-accent{display:none;}
  .st-nav-drawer-cta{display:block;width:100%;margin-top:auto;padding-top:28px;}
  .st-nav-drawer-cta .st-btn{width:100%;}
  .st-nav-inner{gap:16px;}
}

/* ---------- 面包屑 ---------- */
.st-crumb{font-size:13px;color:#8A8E9A;margin-bottom:22px;}
.st-crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.st-crumb li{display:inline-flex;align-items:center;gap:8px;}
.st-crumb li+li::before{content:"/";color:rgba(255,255,255,.24);}
.st-crumb a{color:rgba(255,255,255,.66);}
.st-crumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.st-crumb .is-current{color:#E9E9F0;}

/* ---------- Hero ---------- */
.st-hero{
  position:relative;
  overflow:hidden;
  background:var(--ink-900);
  color:#DCDDE6;
  padding:clamp(36px,5vw,64px) 0 clamp(52px,6.5vw,92px);
}
.st-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,.055) 0 1px,transparent 1px 24px);
  pointer-events:none;
}
.st-hero .container{position:relative;z-index:1;}
.st-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 20px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  border:1px solid rgba(255,255,255,.10);
  background:rgba(255,255,255,.06);
  font-size:13px;
  letter-spacing:.04em;
  color:#B9BAC6;
}
.st-live-dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--accent);
  flex:none;
  animation:stPulse 2s infinite;
}
@keyframes stPulse{
  0%{box-shadow:0 0 0 0 rgba(255,107,53,.55);}
  70%{box-shadow:0 0 0 9px rgba(255,107,53,0);}
  100%{box-shadow:0 0 0 0 rgba(255,107,53,0);}
}
.st-hero-title{
  font-size:clamp(32px,4.6vw,58px);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.02em;
  color:#fff;
  max-width:14em;
}
.st-hero-sub{
  margin:18px 0 28px;
  font-size:clamp(16px,1.5vw,18px);
  line-height:1.75;
  color:#DCDDE6;
  max-width:32em;
}
.st-hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
.st-hero-facts{
  display:flex;
  flex-wrap:wrap;
  gap:28px;
  margin-top:34px;
  padding-top:24px;
  border-top:1px solid rgba(255,255,255,.10);
  font-size:13.5px;
  color:#B9BAC6;
}
.st-hero-facts strong{
  display:block;
  font-size:22px;
  font-weight:800;
  color:#fff;
  font-variant-numeric:tabular-nums;
  line-height:1.3;
}
.st-hero-visual{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid rgba(255,255,255,.10);
  box-shadow:0 32px 64px -32px rgba(0,0,0,.72);
  animation:stFloat 6s ease-in-out infinite;
}
.st-hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.st-hero-visual::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,12,18,.02) 0%,rgba(11,12,18,.56) 100%);
  pointer-events:none;
}
.st-hero-chip{
  position:absolute;
  left:16px;bottom:16px;
  z-index:2;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 14px;
  border-radius:var(--r-pill);
  background:rgba(11,12,18,.62);
  border:1px solid rgba(255,255,255,.16);
  color:#fff;
  font-size:13px;
  line-height:1;
}
.st-hero-chip i{color:var(--accent);}
@keyframes stFloat{
  0%,100%{transform:translateY(-6px);}
  50%{transform:translateY(6px);}
}

/* ---------- 数据条 ---------- */
.st-metrics{background:var(--surface);border-bottom:1px solid var(--line);padding:26px 0;}
.st-metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.st-metric strong{
  display:block;
  font-size:clamp(24px,2.6vw,32px);
  font-weight:800;
  color:var(--ink-900);
  font-variant-numeric:tabular-nums;
  line-height:1.25;
}
.st-metric span{font-size:13px;color:var(--text-3);}
@media (max-width:767.98px){
  .st-metrics-grid{grid-template-columns:repeat(2,1fr);gap:20px 16px;}
}

/* ---------- 通用板块 ---------- */
.st-section{padding:clamp(56px,7vw,104px) 0;}
.st-section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.st-section-head{max-width:720px;margin-bottom:40px;}
.st-section-head h2{font-size:clamp(22px,2.6vw,32px);}
.st-section-head p{margin-top:12px;color:var(--text-2);font-size:15.5px;}
.st-head-row{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  max-width:none;
  flex-wrap:wrap;
}
.st-text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--brand);
  white-space:nowrap;
}
.st-text-link i{transition:transform var(--ease);font-size:12px;}
.st-text-link:hover{color:var(--brand-ink);text-decoration:underline;text-underline-offset:4px;}
.st-text-link:hover i{transform:translateX(4px);}
.st-figure-img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.st-check-list{margin-top:22px;}
.st-check-list li{
  position:relative;
  padding-left:26px;
  margin-bottom:12px;
  font-size:15px;
  color:var(--text-2);
}
.st-check-list li::before{
  content:"\f00c";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  position:absolute;
  left:0;top:0;
  color:var(--mint);
  font-size:13px;
}
.st-body-text{color:var(--text-2);font-size:15.5px;line-height:1.9;}

/* ---------- 编号清单 ---------- */
.st-point-list{border-top:1px solid var(--line);}
.st-point{
  display:flex;
  align-items:flex-start;
  gap:24px;
  padding:22px 12px;
  border-bottom:1px solid var(--line);
  transition:background var(--ease);
}
.st-point:hover{background:var(--brand-soft);}
.st-point-num{
  flex:none;
  min-width:76px;
  font-size:clamp(28px,3vw,46px);
  font-weight:800;
  line-height:1.1;
  color:rgba(108,76,224,.22);
  font-variant-numeric:tabular-nums;
}
.st-point-body h3{font-size:17.5px;font-weight:600;}
.st-point-body p{margin:6px 0 0;font-size:14.5px;line-height:1.75;color:var(--text-2);}
.st-point-arrow{
  margin-left:auto;
  align-self:center;
  color:var(--text-3);
  font-size:13px;
  transition:transform var(--ease),color var(--ease);
}
.st-point:hover .st-point-arrow{transform:translateX(4px);color:var(--brand);}
@media (max-width:575.98px){
  .st-point{gap:14px;padding:18px 8px;}
  .st-point-num{min-width:48px;font-size:26px;}
  .st-point-arrow{display:none;}
}

/* ---------- 卡片 ---------- */
.st-card{
  height:100%;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.st-card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--sh-2);}
.st-card-link{display:flex;flex-direction:column;height:100%;}
.st-card-media{position:relative;overflow:hidden;background:var(--ink-800);}
.st-card-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform 240ms ease-out;}
.st-card:hover .st-card-media img{transform:scale(1.03);}
.st-badge{
  position:absolute;
  left:12px;top:12px;
  padding:4px 11px;
  border-radius:var(--r-pill);
  background:var(--brand-soft);
  color:var(--brand-ink);
  font-size:12px;
  font-weight:600;
  line-height:1.6;
}
.st-card-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1;}
.st-card-title{
  font-size:17px;
  font-weight:600;
  line-height:1.45;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.st-card-desc{
  margin:8px 0 16px;
  font-size:14px;
  line-height:1.7;
  color:var(--text-2);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.st-card-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:var(--text-3);
  font-variant-numeric:tabular-nums;
}
.st-card-more{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand);}
.st-card-more i{font-size:11px;transition:transform var(--ease);}
.st-card:hover .st-card-more i{transform:translateX(3px);}

/* ---------- FAQ ---------- */
.st-faq{border-top:1px solid var(--line);}
.st-faq .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line);border-radius:0;}
.st-faq .accordion-header{margin:0;}
.st-faq .accordion-button{
  position:relative;
  width:100%;
  padding:20px 48px 20px 2px;
  background:transparent;
  border:0;
  border-radius:0;
  box-shadow:none;
  font-size:17px;
  font-weight:600;
  color:var(--text);
  text-align:left;
  transition:color var(--ease);
}
.st-faq .accordion-button:not(.collapsed){color:var(--brand);background:transparent;box-shadow:none;}
.st-faq .accordion-button:focus{box-shadow:none;outline:none;}
.st-faq .accordion-button:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.st-faq .accordion-button::after{
  content:"+";
  position:absolute;
  right:6px;top:50%;
  width:auto;height:auto;
  transform:translateY(-50%);
  background-image:none;
  font-size:22px;
  font-weight:400;
  line-height:1;
  color:var(--text-3);
  transition:transform 220ms ease-out,color var(--ease);
}
.st-faq .accordion-button:not(.collapsed)::after{transform:translateY(-50%) rotate(45deg);color:var(--brand);}
.st-faq .accordion-body{padding:0 48px 22px 2px;font-size:15px;line-height:1.85;color:var(--text-2);}

/* ---------- CTA ---------- */
.st-cta{padding:0 0 clamp(56px,7vw,104px);}
.st-cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
  padding:clamp(28px,4vw,48px);
  border-radius:var(--r-lg);
  background:var(--brand-soft);
  border:1px solid rgba(108,76,224,.18);
}
.st-cta-inner h2{font-size:clamp(20px,2.2vw,28px);}
.st-cta-inner p{margin:8px 0 0;font-size:15px;color:var(--text-2);}
@media (max-width:575.98px){
  .st-cta-inner{flex-direction:column;align-items:flex-start;}
  .st-cta-inner .st-btn{width:100%;}
}

/* ---------- 页脚 ---------- */
.st-footer{
  background:var(--ink-900);
  color:rgba(255,255,255,.66);
  border-top:1px solid rgba(255,255,255,.10);
  padding:clamp(48px,6vw,72px) 0 28px;
  font-size:14px;
}
.st-footer-grid{--bs-gutter-x:32px;--bs-gutter-y:32px;}
.st-footer-logo{
  display:inline-flex;
  align-items:center;
  gap:9px;
  margin-bottom:14px;
  font-size:18px;
  font-weight:800;
  color:#fff;
}
.st-footer p{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.6);max-width:34em;}
.st-footer h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.02em;}
.st-footer-links{display:flex;flex-direction:column;gap:10px;}
.st-footer-links a{display:inline-block;font-size:13.5px;color:rgba(255,255,255,.66);}
.st-footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.st-footer-meta{display:flex;flex-direction:column;gap:10px;font-size:13.5px;color:rgba(255,255,255,.6);}
.st-sub-form{display:flex;gap:8px;}
.st-sub-form input{
  flex:1;
  min-width:0;
  height:44px;
  padding:0 14px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.06);
  color:#fff;
  font-size:14px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.st-sub-form input::placeholder{color:rgba(255,255,255,.42);}
.st-sub-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(108,76,224,.12);}
.st-sub-form button{
  height:44px;
  padding:0 18px;
  border:0;
  border-radius:12px;
  background:var(--accent);
  color:#fff;
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  transition:background var(--ease),box-shadow var(--ease);
}
.st-sub-form button:hover{background:var(--accent-ink);box-shadow:0 0 0 5px rgba(255,107,53,.22);}
.st-sub-form button:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.st-form-tip{margin-top:10px;font-size:12.5px;color:rgba(255,255,255,.45);}
.st-footer-bottom{
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.10);
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:12.5px;
  color:var(--text-3);
}
@media (max-width:767.98px){
  .st-sub-form{flex-direction:column;}
  .st-sub-form button{width:100%;}
  .st-footer-grid{--bs-gutter-y:24px;}
}

/* ---------- 入场动效 ---------- */
.st-js .st-reveal{opacity:0;transform:translateY(12px);transition:opacity .55s ease-out,transform .55s ease-out;}
.st-js .st-reveal.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;}
  .st-js .st-reveal{opacity:1;transform:none;}
  .st-hero-visual,.st-live-dot{animation:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --ink-900:#0B0C12;
  --ink-800:#14161F;
  --ink-700:#1F2230;
  --paper:#F7F6F3;
  --surface:#FFFFFF;
  --line:#E6E3DD;
  --line-dark:rgba(255,255,255,.10);
  --text:#191B22;
  --text-2:#5B5F6C;
  --text-3:#8A8E9A;
  --text-invert:#E9E9F0;
  --brand:#6C4CE0;
  --brand-ink:#4530A8;
  --brand-soft:#EFEBFF;
  --accent:#FF6B35;
  --accent-ink:#E0521F;
  --mint:#14B892;
  --star:#FFD25E;
  --danger:#C8402F;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:24px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(11,12,18,.04), 0 10px 28px -14px rgba(11,12,18,.10);
  --shadow-2:0 2px 6px rgba(11,12,18,.06), 0 18px 40px -18px rgba(11,12,18,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:.2s;
  --nav-h:68px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease), border-color var(--dur) var(--ease), opacity var(--dur) var(--ease);}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0 0 16px;}
p:last-child{margin-bottom:0;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
figure{margin:0;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:-.01em;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
::selection{background:var(--brand-soft);color:var(--brand-ink);}
.st-num{font-variant-numeric:tabular-nums;}

/* ============ Bootstrap 覆盖 ============ */
.container{width:100%;max-width:1280px;margin-inline:auto;padding-inline:24px;}
@media (min-width:1400px){.container{max-width:1360px;}}
.row{--bs-gutter-x:24px;--bs-gutter-y:24px;}
.btn{border-radius:var(--r-pill);font-weight:600;padding:12px 24px;border:1px solid transparent;transition:all var(--dur) var(--ease);}
.btn-primary{background:var(--brand);border-color:var(--brand);}
.btn-primary:hover,.btn-primary:focus{background:var(--brand-ink);border-color:var(--brand-ink);}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-1);}
.navbar{padding:0;background:transparent;}
.nav-link{color:var(--text);padding:0;}
.form-control,.form-select{
  height:48px;border:1px solid var(--line);border-radius:12px;background:var(--surface);
  color:var(--text);font-size:15px;padding:0 16px;box-shadow:none;
}
.form-control:focus,.form-select:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(108,76,224,.12);}
.form-control::placeholder{color:var(--text-3);}
.accordion-item{background:transparent;border:0;}
.accordion-button{background:transparent;color:var(--text);}
.badge{border-radius:var(--r-pill);font-weight:600;}
.offcanvas{background:var(--surface);}

/* ============ 顶部信息条 ============ */
.st-topbar{background:var(--ink-900);color:var(--text-3);font-size:12.5px;letter-spacing:.02em;}
.st-topbar-inner{
  min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.st-topbar-note{color:rgba(233,233,240,.72);}
.st-topbar-domain{
  color:rgba(233,233,240,.42);font-variant-numeric:tabular-nums;
  padding-inline:16px;border-left:1px solid var(--line-dark);border-right:1px solid var(--line-dark);
}
.st-topbar-links{display:flex;align-items:center;gap:12px;}
.st-topbar-links a{color:rgba(233,233,240,.78);}
.st-topbar-links a:hover{color:#fff;}
.st-topbar-sep{width:1px;height:12px;background:var(--line-dark);display:inline-block;}

/* ============ 主导航 ============ */
.st-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(247,246,243,.94);
  backdrop-filter:saturate(160%) blur(10px);
  -webkit-backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.st-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 1px 0 rgba(11,12,18,.02),0 12px 24px -20px rgba(11,12,18,.24);}
.st-nav-inner{
  min-height:var(--nav-h);
  display:flex;align-items:center;gap:24px;
  transition:min-height var(--dur) var(--ease);
}
.st-header.is-scrolled .st-nav-inner{min-height:56px;}
.st-logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:19px;font-weight:800;letter-spacing:-.02em;color:var(--ink-900);
  white-space:nowrap;
}
.st-logo-dot{
  width:11px;height:11px;border-radius:50%;flex:0 0 auto;
  background:radial-gradient(circle at 32% 30%, #fff 0 16%, var(--brand) 62%);
  box-shadow:0 0 0 4px rgba(108,76,224,.14);
}
.st-nav-list{display:flex;align-items:center;gap:4px;margin-left:auto;}
.st-nav-link{
  display:inline-block;position:relative;
  padding:10px 14px;font-size:15px;font-weight:500;color:var(--text-2);
  border-radius:var(--r-sm);
}
.st-nav-link:hover{color:var(--ink-900);background:rgba(11,12,18,.04);}
.st-nav-link.is-active{color:var(--ink-900);font-weight:600;}
.st-nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
}
.st-nav-right{display:flex;align-items:center;gap:10px;}
.st-icon-btn{
  width:40px;height:40px;border-radius:var(--r-pill);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--text-2);border:1px solid var(--line);background:var(--surface);
  transition:all var(--dur) var(--ease);
}
.st-icon-btn:hover{color:var(--brand);border-color:var(--brand);background:var(--brand-soft);}
.st-burger{display:none;width:40px;height:40px;border-radius:var(--r-pill);border:1px solid var(--line);align-items:center;justify-content:center;color:var(--ink-900);background:var(--surface);}

/* ============ 按钮 ============ */
.st-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;white-space:nowrap;
  transition:transform var(--dur) var(--ease), background-color var(--dur) var(--ease),
             border-color var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.st-btn:active{transform:translateY(1px);}
.st-btn-sm{height:40px;padding:0 18px;font-size:14px;}
.st-btn-block{width:100%;}
.st-btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 24px -14px rgba(255,107,53,.85);}
.st-btn-accent:hover{background:var(--accent-ink);color:#fff;box-shadow:0 14px 30px -14px rgba(255,107,53,.55);}
.st-btn-outline{border-color:var(--line);color:var(--ink-900);background:var(--surface);}
.st-btn-outline:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);}
.st-btn-ghost{border-color:rgba(255,255,255,.28);color:#fff;background:transparent;}
.st-btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.10);color:#fff;}
.st-text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);
}
.st-text-link i{transition:transform var(--dur) var(--ease);}
.st-text-link:hover{color:var(--brand-ink);text-decoration:underline;text-underline-offset:4px;}
.st-text-link:hover i{transform:translateX(4px);}

/* ============ Hero ============ */
.st-hero{
  position:relative;background:var(--ink-900);color:var(--text-invert);
  padding:44px 0 132px;overflow:hidden;text-align:center;
}
.st-hero::before{
  content:"";position:absolute;inset:0;
  background-image:
    radial-gradient(circle at 18% 24%, rgba(255,255,255,.05) 0 1.4px, transparent 1.6px),
    radial-gradient(circle at 72% 62%, rgba(255,255,255,.045) 0 1.2px, transparent 1.5px),
    radial-gradient(circle at 46% 12%, rgba(108,76,224,.28) 0 1.6px, transparent 1.9px),
    radial-gradient(circle at 88% 30%, rgba(255,255,255,.04) 0 1.2px, transparent 1.5px);
  background-size:340px 340px, 260px 260px, 460px 460px, 300px 300px;
  opacity:.9;pointer-events:none;
}
.st-hero .container{position:relative;z-index:2;}
.st-crumbs{
  display:flex;align-items:center;justify-content:center;gap:8px;
  font-size:13px;color:rgba(233,233,240,.55);margin-bottom:26px;
}
.st-crumbs a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.st-crumbs i{font-size:10px;opacity:.6;}
.st-crumbs span{color:rgba(233,233,240,.88);}
.st-hero h1{
  font-size:clamp(30px,4.4vw,52px);
  font-weight:800;line-height:1.18;letter-spacing:-.02em;
  color:#fff;max-width:900px;margin:0 auto;
}
.st-hero-lead{
  max-width:640px;margin:22px auto 0;
  font-size:clamp(16px,1.5vw,18px);line-height:1.8;color:rgba(233,233,240,.76);
}
.st-hero-actions{
  display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:32px;
}
.st-hero-stats{
  display:flex;flex-wrap:wrap;justify-content:center;gap:14px 44px;margin-top:40px;
  padding-top:28px;border-top:1px solid var(--line-dark);
}
.st-stat{display:flex;flex-direction:column;align-items:center;gap:2px;}
.st-stat strong{font-size:clamp(22px,2.4vw,30px);font-weight:800;color:#fff;letter-spacing:-.02em;}
.st-stat span{font-size:12.5px;color:rgba(233,233,240,.55);letter-spacing:.02em;}
.st-stat span em{color:var(--mint);font-style:normal;font-weight:600;}
.st-hero-media{position:relative;z-index:3;margin-top:-96px;}
.st-cover-wide{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-2);background:var(--ink-800);
}
.st-cover-wide img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.st-cover-cap{
  margin-top:12px;font-size:13px;color:var(--text-3);text-align:center;letter-spacing:.01em;
}

/* ============ 通用板块 ============ */
.st-section{padding-block:clamp(56px,7vw,104px);}
.st-section-head{max-width:760px;margin-bottom:clamp(28px,3vw,40px);}
.st-section-head.is-center{margin-inline:auto;text-align:center;}
.st-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;
  color:var(--brand);margin-bottom:14px;
}
.st-eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);border-radius:2px;}
.st-h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;color:var(--ink-900);}
.st-sub{margin-top:14px;font-size:15.5px;color:var(--text-2);line-height:1.8;}

/* ============ 图文交错 ============ */
.st-alt{padding-block:clamp(48px,6vw,88px);}
.st-alt + .st-alt{border-top:1px solid var(--line);}
.st-alt-media{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-1);background:var(--surface);
}
.st-alt-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .28s var(--ease);}
.st-alt-media:hover img{transform:scale(1.03);}
.st-alt h2{font-size:clamp(20px,2.3vw,28px);color:var(--ink-900);margin-bottom:16px;}
.st-alt p{color:var(--text-2);font-size:15.5px;}
.st-points{margin-top:22px;display:grid;gap:12px;}
.st-points li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text);}
.st-points i{color:var(--brand);margin-top:7px;font-size:13px;}

/* ============ 编号清单 ============ */
.st-numlist{border-top:1px solid var(--line);}
.st-numlist-item{
  display:flex;align-items:flex-start;gap:clamp(16px,2.4vw,32px);
  padding:24px 12px;border-bottom:1px solid var(--line);
  transition:background-color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}
.st-numlist-item:hover{background:var(--brand-soft);}
.st-numlist-item:hover .st-numlist-arrow{transform:translateX(4px);}
.st-num{
  flex:0 0 auto;min-width:64px;
  font-size:clamp(30px,3.6vw,48px);font-weight:800;line-height:1;
  color:transparent;-webkit-text-stroke:1.2px rgba(108,76,224,.55);
  font-variant-numeric:tabular-nums;padding-top:4px;
}
.st-numlist-body{flex:1 1 auto;}
.st-numlist-body h3{font-size:17px;font-weight:600;color:var(--ink-900);margin-bottom:6px;}
.st-numlist-body p{font-size:14.5px;color:var(--text-2);margin:0;}
.st-numlist-arrow{align-self:center;color:var(--brand);transition:transform var(--dur) var(--ease);}

/* ============ 卡片栅格 ============ */
.st-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.st-card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow-2);}
.st-card-media{aspect-ratio:16/10;overflow:hidden;background:var(--brand-soft);}
.st-card-media img{width:100%;height:100%;object-fit:cover;transition:transform .28s var(--ease);}
.st-card:hover .st-card-media img{transform:scale(1.03);}
.st-card-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1 1 auto;gap:12px;}
.st-badge{
  display:inline-flex;align-items:center;gap:6px;align-self:flex-start;
  padding:4px 12px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand-ink);
  font-size:12px;font-weight:600;letter-spacing:.02em;
}
.st-card-body h3{font-size:17px;font-weight:600;color:var(--ink-900);line-height:1.5;}
.st-card-body p{
  font-size:14.5px;color:var(--text-2);line-height:1.7;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.st-card-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);
}
.st-card-foot .st-more{font-size:13.5px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:5px;}
.st-card-foot .st-more i{transition:transform var(--dur) var(--ease);}
.st-card:hover .st-card-foot .st-more i{transform:translateX(4px);}

/* ============ FAQ ============ */
.st-faq{border-top:1px solid var(--line);}
.st-faq-item{border-bottom:1px solid var(--line);}
.st-faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 4px;text-align:left;font-size:17px;font-weight:600;color:var(--ink-900);
  transition:color var(--dur) var(--ease);
}
.st-faq-q:hover{color:var(--brand);}
.st-faq-q[aria-expanded="true"]{color:var(--brand);}
.st-faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);color:var(--text-2);font-size:12px;
  transition:transform var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.st-faq-q:hover .st-faq-icon{border-color:var(--brand);color:var(--brand);}
.st-faq-q[aria-expanded="true"] .st-faq-icon{transform:rotate(45deg);border-color:var(--brand);color:var(--brand);}
.st-faq-a{padding:0 4px 26px;font-size:15px;line-height:1.85;color:var(--text-2);max-width:820px;}

/* ============ CTA ============ */
.st-cta{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
  padding:clamp(28px,3.4vw,44px);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-1);
}
.st-cta h2{font-size:clamp(20px,2.2vw,26px);color:var(--ink-900);}
.st-cta p{margin-top:10px;font-size:15px;color:var(--text-2);max-width:520px;}
.st-cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ============ 页脚 ============ */
.st-footer{
  background:var(--ink-900);color:rgba(233,233,240,.66);
  border-top:1px solid var(--line-dark);
  padding-block:clamp(48px,6vw,72px) 28px;font-size:13.5px;
}
.st-footer-grid{row-gap:32px;}
.st-footer-logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:18px;font-weight:800;color:#fff;letter-spacing:-.01em;margin-bottom:16px;
}
.st-footer p{color:rgba(233,233,240,.6);line-height:1.85;max-width:340px;font-size:13.5px;}
.st-footer h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:18px;letter-spacing:.02em;}
.st-footer-links{display:flex;flex-direction:column;gap:11px;}
.st-footer-links a{color:rgba(233,233,240,.66);width:fit-content;}
.st-footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.st-footer-meta{display:flex;flex-direction:column;gap:11px;color:rgba(233,233,240,.6);font-variant-numeric:tabular-nums;}
.st-sub-form{display:flex;gap:10px;}
.st-sub-form input{
  flex:1 1 auto;min-width:0;height:48px;border-radius:12px;
  border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);
  color:#fff;padding:0 14px;font-size:14px;
}
.st-sub-form input::placeholder{color:rgba(233,233,240,.45);}
.st-sub-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(108,76,224,.22);}
.st-sub-form button{
  flex:0 0 auto;height:48px;padding:0 20px;border-radius:12px;
  background:var(--accent);color:#fff;font-weight:600;font-size:14px;
  transition:background-color var(--dur) var(--ease);
}
.st-sub-form button:hover{background:var(--accent-ink);}
.st-form-tip{margin-top:12px;font-size:12.5px;color:rgba(233,233,240,.42);}
.st-footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:12.5px;color:rgba(233,233,240,.42);
}

/* ============ 抽屉 ============ */
.st-drawer{width:min(86vw,360px);border-left:1px solid var(--line);}
.st-drawer .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 22px;}
.st-drawer-title{font-size:17px;font-weight:800;color:var(--ink-900);display:inline-flex;align-items:center;gap:10px;}
.st-drawer .offcanvas-body{padding:14px 12px;display:flex;flex-direction:column;gap:2px;}
.st-drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:15px 14px;border-radius:var(--r-sm);
  font-size:18px;font-weight:600;color:var(--text-2);
  transition:all var(--dur) var(--ease);
}
.st-drawer-link:hover{background:var(--brand-soft);color:var(--brand-ink);}
.st-drawer-link.is-active{color:var(--brand);}
.st-drawer-foot{padding:18px 22px 26px;border-top:1px solid var(--line);}

/* ============ 动画 ============ */
.st-reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease), transform .5s var(--ease);}
.st-reveal.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important;}
  .st-reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .st-nav-list{gap:0;}
  .st-nav-link{padding:10px 10px;font-size:14.5px;}
}
@media (max-width:991.98px){
  .st-nav-list{display:none;}
  .st-burger{display:inline-flex;}
  .st-nav-right .st-btn{display:none;}
  .st-hero{padding:36px 0 108px;}
  .st-hero-media{margin-top:-76px;}
  .st-num{min-width:48px;-webkit-text-stroke:1px rgba(108,76,224,.5);}
}
@media (max-width:767.98px){
  .container{padding-inline:16px;}
  .st-topbar-domain{display:none !important;}
  .st-topbar-note{font-size:12px;}
  .st-hero{padding:28px 0 96px;}
  .st-hero-media{margin-top:-60px;}
  .st-hero-stats{gap:18px 28px;justify-content:space-between;}
  .st-stat{flex:1 1 40%;}
  .st-cover-wide{border-radius:16px;}
  .st-alt-media img{aspect-ratio:16/10;}
  .st-cta{flex-direction:column;align-items:flex-start;}
  .st-cta-actions{width:100%;}
  .st-cta-actions .st-btn{flex:1 1 auto;}
  .st-sub-form{flex-direction:column;}
  .st-sub-form button{width:100%;}
  .st-crumbs{margin-bottom:18px;}
}
@media (max-width:575.98px){
  .st-logo{font-size:16px;}
  .st-numlist-item{gap:14px;padding:20px 6px;}
  .st-num{font-size:26px;min-width:34px;}
  .st-faq-q{font-size:16px;padding:20px 2px;}
  .st-card-body{padding:18px;}
}

/* roulang page: category3 */
:root{
  --ink-900:#0B0C12;
  --ink-800:#14161F;
  --ink-700:#1F2230;
  --paper:#F7F6F3;
  --surface:#FFFFFF;
  --line:#E6E3DD;
  --line-dark:rgba(255,255,255,.10);
  --text:#191B22;
  --text-2:#5B5F6C;
  --text-3:#8A8E9A;
  --brand:#6C4CE0;
  --brand-ink:#4530A8;
  --brand-soft:#EFEBFF;
  --accent:#FF6B35;
  --accent-ink:#E0521F;
  --mint:#14B892;
  --star:#FFD25E;
  --danger:#D2453C;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:24px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(11,12,18,.04), 0 10px 28px -14px rgba(11,12,18,.10);
  --sh-2:0 2px 6px rgba(11,12,18,.06), 0 18px 40px -18px rgba(11,12,18,.16);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  background:var(--paper);
  color:var(--text);
  font-size:16px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand)}
button{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1280px!important;padding-left:24px;padding-right:24px;margin:0 auto}
@media (min-width:1400px){.container{max-width:1360px!important}}
.row{--bs-gutter-x:24px;--bs-gutter-y:24px}

/* ===== Header / Nav ===== */
.st-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(247,246,243,.94);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease),background .22s var(--ease);
}
.st-header.is-scrolled{box-shadow:0 8px 24px -18px rgba(11,12,18,.28);background:rgba(255,255,255,.96)}
.st-nav-inner{display:flex;align-items:center;gap:20px;height:68px;transition:height .22s var(--ease)}
.st-header.is-scrolled .st-nav-inner{height:56px}
.st-logo{display:inline-flex;align-items:center;gap:9px;font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--ink-900);white-space:nowrap}
.st-logo:hover{color:var(--ink-900)}
.st-logo-dot{width:10px;height:10px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(108,76,224,.14);flex:none}
.st-nav-list{display:flex;align-items:center;gap:2px;margin-left:auto}
.st-nav-link{position:relative;display:inline-block;padding:10px 12px;font-size:15px;color:var(--text-2);border-radius:var(--r-sm);transition:color .2s var(--ease),background .2s var(--ease)}
.st-nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease)}
.st-nav-link:hover{color:var(--ink-900);background:rgba(108,76,224,.06)}
.st-nav-link:hover::after{transform:scaleX(1)}
.st-nav-link.is-active{color:var(--ink-900);font-weight:700}
.st-nav-link.is-active::after{transform:scaleX(1)}
.st-nav-right{display:flex;align-items:center;gap:10px;margin-left:10px}
.st-icon-btn{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--text-2);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease)}
.st-icon-btn:hover{color:var(--brand);border-color:var(--brand);transform:translateY(-2px)}
.st-burger{display:none;width:42px;height:42px;border-radius:var(--r-sm);border:1px solid var(--line);background:var(--surface);color:var(--ink-900);align-items:center;justify-content:center;cursor:pointer}
.st-drawer{position:fixed;inset:0;z-index:1060;background:var(--ink-900);padding:24px;display:flex;flex-direction:column;opacity:0;visibility:hidden;transform:translateY(-16px);transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s}
.st-drawer.is-open{opacity:1;visibility:visible;transform:none}
.st-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}
.st-drawer-logo{color:#fff;font-size:18px;font-weight:800}
.st-drawer-close{width:42px;height:42px;border-radius:50%;border:1px solid var(--line-dark);background:transparent;color:#fff;cursor:pointer}
.st-drawer-list{display:flex;flex-direction:column;gap:6px}
.st-drawer-list a{display:block;padding:14px 4px;font-size:22px;font-weight:700;color:#E9E9F0;border-bottom:1px solid var(--line-dark)}
.st-drawer-list a.is-active{color:var(--brand)}
.st-drawer-foot{margin-top:auto}

/* ===== Buttons / Badges ===== */
.st-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:var(--r-pill);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease)}
.st-btn:active{transform:translateY(0) scale(.99)}
.st-btn-accent{background:var(--accent);color:#fff}
.st-btn-accent:hover{background:var(--accent-ink);color:#fff;transform:translateY(-2px);box-shadow:0 0 0 8px rgba(255,107,53,.14)}
.st-btn-brand{background:var(--brand);color:#fff}
.st-btn-brand:hover{background:var(--brand-ink);color:#fff;transform:translateY(-2px);box-shadow:0 0 0 8px rgba(108,76,224,.16)}
.st-btn-ghost{background:var(--surface);border-color:var(--line);color:var(--ink-900)}
.st-btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.st-btn-sm{height:40px;padding:0 20px;font-size:14px}
.st-badge{display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:var(--r-pill);background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:600;letter-spacing:.02em}
.st-badge-mint{background:rgba(20,184,146,.12);color:#0E8A6D}

/* ===== Breadcrumb ===== */
.st-crumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3);padding:22px 0 0}
.st-crumb a{color:var(--text-3)}
.st-crumb a:hover{color:var(--brand)}
.st-crumb span[aria-current]{color:var(--text-2)}

/* ===== Blocks ===== */
.st-block{padding:clamp(52px,7vw,96px) 0}
.st-sec-head{margin-bottom:28px}
.st-sec-title{position:relative;padding-left:16px;font-size:clamp(22px,2.6vw,32px);font-weight:700;letter-spacing:-.01em;line-height:1.3;color:var(--ink-900)}
.st-sec-title::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;border-radius:3px;background:var(--brand)}
.st-sec-desc{margin-top:10px;color:var(--text-2);font-size:15px;max-width:640px}
.st-hero{padding:8px 0 0}
.st-h1-bar{position:relative;padding-left:20px;font-size:clamp(28px,4vw,44px);line-height:1.2;font-weight:800;letter-spacing:-.02em;color:var(--ink-900);margin-bottom:18px}
.st-h1-bar::before{content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:3px;border-radius:3px;background:var(--brand)}
.st-lead{font-size:clamp(16px,1.5vw,18px);color:var(--text-2);max-width:560px;margin-bottom:26px}
.st-hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.st-trust{display:flex;flex-wrap:wrap;gap:28px;padding-top:22px;border-top:1px solid var(--line)}
.st-trust li{font-size:13px;color:var(--text-3)}
.st-trust strong{display:block;font-size:24px;font-weight:700;color:var(--ink-900);letter-spacing:-.01em}
.st-trust .mint{color:var(--mint)}
.st-media{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);background:var(--ink-800);position:relative}
.st-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/5}
.st-media-tag{position:absolute;left:16px;bottom:16px;display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:var(--r-pill);background:rgba(11,12,18,.62);color:#EDEDF4;font-size:12px;letter-spacing:.02em}
.st-media-tag i{color:var(--accent)}

/* ===== Panels ===== */
.st-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;box-shadow:var(--sh-1);height:100%}
.st-panel h3{font-size:19px;font-weight:700;color:var(--ink-900);margin-bottom:12px}
.st-panel p{font-size:15px;color:var(--text-2);margin-bottom:14px}
.st-panel p:last-child{margin-bottom:0}
.st-panel-img{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);margin-bottom:22px}
.st-panel-img img{width:100%;aspect-ratio:16/10;object-fit:cover}
.st-mini-list li{display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-bottom:1px dashed var(--line);font-size:15px;color:var(--text-2)}
.st-mini-list li:last-child{border-bottom:0;padding-bottom:0}
.st-mini-list i{color:var(--brand);margin-top:6px;font-size:12px}

/* ===== Numbered list ===== */
.st-numlist{border-top:1px solid var(--line)}
.st-num-item{display:flex;align-items:center;gap:22px;padding:24px 12px;border-bottom:1px solid var(--line);transition:background .2s var(--ease),padding-left .2s var(--ease)}
.st-num-item:hover{background:var(--brand-soft);padding-left:20px}
.st-num{flex:none;width:64px;font-size:40px;font-weight:800;line-height:1;color:var(--brand);opacity:.34;letter-spacing:-.03em}
.st-num-body{flex:1;min-width:0}
.st-num-body h3{font-size:17px;font-weight:600;color:var(--ink-900);margin-bottom:2px}
.st-num-body p{font-size:14px;color:var(--text-2)}
.st-num-arrow{flex:none;color:var(--text-3);transition:transform .2s var(--ease),color .2s var(--ease)}
.st-num-item:hover .st-num-arrow{transform:translateX(6px);color:var(--brand)}

/* ===== Cards ===== */
.st-card{display:flex;flex-direction:column;height:100%;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease)}
.st-card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--sh-2);color:inherit}
.st-card-media{overflow:hidden;background:var(--brand-soft)}
.st-card-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s var(--ease)}
.st-card:hover .st-card-media img{transform:scale(1.03)}
.st-card-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.st-card-body h3{font-size:17px;font-weight:700;color:var(--ink-900);line-height:1.5}
.st-card-body p{font-size:14px;color:var(--text-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.st-card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);padding-top:8px}
.st-card-foot .st-more{color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.st-card:hover .st-more i{transform:translateX(4px)}
.st-more i{transition:transform .2s var(--ease)}

/* ===== FAQ ===== */
.st-faq .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.st-faq .accordion-item:first-child{border-top:1px solid var(--line)}
.st-faq .accordion-button{position:relative;width:100%;background:transparent;border:0;padding:22px 48px 22px 0;font-size:17px;font-weight:600;color:var(--ink-900);text-align:left;line-height:1.6;box-shadow:none!important;border-radius:0!important}
.st-faq .accordion-button:not(.collapsed){color:var(--brand)}
.st-faq .accordion-button::after{content:"+";position:absolute;right:8px;top:50%;transform:translateY(-50%);width:auto;height:auto;background-image:none;font-size:26px;font-weight:300;line-height:1;color:var(--text-3);transition:transform .22s var(--ease),color .22s var(--ease)}
.st-faq .accordion-button.collapsed::after{transform:translateY(-50%)}
.st-faq .accordion-button:not(.collapsed)::after{transform:translateY(-50%) rotate(45deg);color:var(--brand)}
.st-faq .accordion-body{padding:0 48px 26px 0;font-size:15px;color:var(--text-2)}

/* ===== CTA ===== */
.st-cta{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(28px,4vw,48px);box-shadow:var(--sh-1);display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.st-cta h2{font-size:clamp(22px,2.4vw,30px);font-weight:800;color:var(--ink-900);letter-spacing:-.01em;margin-bottom:8px}
.st-cta p{font-size:15px;color:var(--text-2);max-width:560px}
.st-cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ===== Footer ===== */
.st-footer{background:var(--ink-900);color:rgba(255,255,255,.66);padding:clamp(48px,6vw,80px) 0 0;margin-top:clamp(48px,6vw,88px);border-top:1px solid var(--line-dark)}
.st-footer-grid{row-gap:32px}
.st-footer-logo{display:inline-flex;align-items:center;gap:9px;color:#fff;font-size:18px;font-weight:800;margin-bottom:14px}
.st-footer h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.02em}
.st-footer-links{display:flex;flex-direction:column;gap:10px}
.st-footer-links a{color:rgba(255,255,255,.66);font-size:14px}
.st-footer-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.st-footer-meta{display:flex;flex-direction:column;gap:10px;font-size:14px}
.st-footer p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6)}
.st-sub-form{display:flex;gap:10px;margin-bottom:12px}
.st-sub-form input{flex:1;min-width:0;height:48px;padding:0 14px;border-radius:12px;border:1px solid var(--line-dark);background:rgba(255,255,255,.05);color:#fff;font-size:14px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.st-sub-form input::placeholder{color:rgba(255,255,255,.42)}
.st-sub-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(108,76,224,.28)}
.st-sub-form button{height:48px;padding:0 20px;border-radius:12px;border:0;background:var(--accent);color:#fff;font-weight:600;cursor:pointer;white-space:nowrap;transition:background .18s var(--ease)}
.st-sub-form button:hover{background:var(--accent-ink)}
.st-form-tip{font-size:12px!important;color:rgba(255,255,255,.45)!important}
.st-footer-bottom{margin-top:44px;padding:20px 0 28px;border-top:1px solid var(--line-dark);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:12px;color:var(--text-3)}

/* ===== Reveal ===== */
.st-reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.st-reveal.is-visible{opacity:1;transform:none}

/* ===== Responsive ===== */
@media (min-width:992px){
  .st-shift{margin-top:72px}
}
@media (max-width:991.98px){
  .st-nav-list{display:none}
  .st-burger{display:inline-flex}
  .st-icon-btn{display:none}
  .st-shift{margin-top:0}
  .st-hero{padding-top:0}
}
@media (max-width:767.98px){
  .container{padding-left:16px;padding-right:16px}
  .row{--bs-gutter-x:16px;--bs-gutter-y:16px}
  .st-nav-inner{height:60px}
  .st-logo{font-size:17px}
  .st-trust{gap:20px}
  .st-trust strong{font-size:20px}
  .st-num-item{gap:14px;padding:18px 8px}
  .st-num{width:44px;font-size:28px}
  .st-cta{flex-direction:column;align-items:flex-start}
  .st-cta-actions{width:100%}
  .st-cta-actions .st-btn{flex:1}
  .st-sub-form{flex-direction:column}
  .st-sub-form button{width:100%}
}
@media (max-width:575.98px){
  .st-h1-bar{font-size:26px}
  .st-panel{padding:22px}
  .st-btn{height:46px;padding:0 20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .st-reveal{opacity:1;transform:none}
}

/* roulang page: category4 */
:root{
  --ink-900:#0B0C12;
  --ink-800:#14161F;
  --ink-700:#1F2230;
  --paper:#F7F6F3;
  --surface:#FFFFFF;
  --line:#E6E3DD;
  --text:#191B22;
  --text-2:#5B5F6C;
  --text-3:#8A8E9A;
  --brand:#6C4CE0;
  --brand-ink:#4530A8;
  --brand-soft:#EFEBFF;
  --accent:#FF6B35;
  --accent-ink:#E0521F;
  --mint:#14B892;
  --star:#FFD25E;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:24px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(11,12,18,.04),0 10px 28px -14px rgba(11,12,18,.10);
  --shadow-2:0 2px 6px rgba(11,12,18,.06),0 18px 40px -18px rgba(11,12,18,.16);
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.st-num{font-variant-numeric:tabular-nums;}

h1{font-size:clamp(28px,4vw,44px);font-weight:800;line-height:1.2;letter-spacing:-.02em;color:var(--ink-900);}
h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;line-height:1.3;letter-spacing:-.01em;color:var(--ink-900);}
h3{font-size:20px;font-weight:600;line-height:1.45;color:var(--ink-900);}

.container{width:100%;max-width:1280px;margin-inline:auto;padding-inline:24px;}
@media (min-width:1400px){.container{max-width:1360px;}}
@media (max-width:767.98px){.container{padding-inline:16px;}}

.row{--bs-gutter-x:24px;--bs-gutter-y:24px;}
@media (max-width:767.98px){.row{--bs-gutter-x:16px;--bs-gutter-y:16px;}}

/* ============ 顶部导航 ============ */
.st-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(247,246,243,.94);
  -webkit-backdrop-filter:saturate(150%) blur(10px);
  backdrop-filter:saturate(150%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.st-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 10px 30px -24px rgba(11,12,18,.6);}
.st-nav-inner{display:flex;align-items:center;gap:20px;height:68px;transition:height .2s ease-out;}
.st-header.is-scrolled .st-nav-inner{height:56px;}

.st-logo{
  display:inline-flex;align-items:center;gap:10px;flex:none;margin-right:auto;
  font-size:18px;font-weight:800;letter-spacing:-.01em;color:var(--ink-900);
  transition:color .18s ease-out;
}
.st-logo:hover{color:var(--brand-ink);}
.st-logo-dot{
  width:10px;height:10px;border-radius:50%;flex:none;
  background:var(--brand);
  box-shadow:0 0 0 4px rgba(108,76,224,.14);
}

.st-nav-list{display:flex;align-items:center;justify-content:center;gap:2px;flex:1 1 auto;}
.st-nav-link{
  position:relative;display:inline-block;padding:8px 14px;
  font-size:15px;font-weight:500;color:var(--text-2);border-radius:var(--r-pill);
  transition:color .18s ease-out,background-color .18s ease-out;
}
.st-nav-link:hover{color:var(--ink-900);background:rgba(108,76,224,.07);}
.st-nav-link.is-active{color:var(--ink-900);font-weight:700;background:transparent;}
.st-nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
}
.st-nav-right{display:flex;align-items:center;gap:10px;flex:none;}

.st-icon-btn{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--surface);color:var(--ink-900);
  border-radius:12px;cursor:pointer;
  transition:border-color .18s ease-out,color .18s ease-out,background-color .18s ease-out;
}
.st-icon-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);}
.st-icon-btn:active{transform:scale(.97);}

.st-burger{
  display:none;width:40px;height:40px;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--surface);color:var(--ink-900);
  border-radius:12px;cursor:pointer;
  transition:border-color .18s ease-out,color .18s ease-out;
}
.st-burger:hover{border-color:var(--brand);color:var(--brand);}

/* 抽屉 */
.st-drawer{background:var(--paper);width:min(86vw,360px);}
.st-drawer .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px;}
.st-drawer .offcanvas-body{padding:18px 20px;}
.st-drawer-title{font-size:16px;font-weight:800;color:var(--ink-900);display:inline-flex;align-items:center;gap:10px;}
.st-drawer-list{display:flex;flex-direction:column;gap:2px;}
.st-drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 4px;font-size:19px;font-weight:700;color:var(--ink-900);
  border-bottom:1px solid var(--line);
  transition:color .18s ease-out,padding-left .18s ease-out;
}
.st-drawer-link:hover,.st-drawer-link.is-active{color:var(--brand);padding-left:10px;}
.st-drawer-foot{margin-top:24px;display:flex;flex-direction:column;gap:12px;}
.st-drawer-foot .st-btn{width:100%;}

/* ============ 按钮 ============ */
.st-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1.4;letter-spacing:0;
  border:1px solid transparent;cursor:pointer;text-align:center;
  transition:transform .18s ease-out,background-color .18s ease-out,border-color .18s ease-out,color .18s ease-out,box-shadow .18s ease-out;
}
.st-btn:active{transform:scale(.985);}
.st-btn-sm{padding:9px 18px;font-size:14px;}
.st-btn-lg{padding:15px 32px;font-size:16px;}
.st-btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 24px -14px rgba(255,107,53,.7);}
.st-btn-accent:hover{background:var(--accent-ink);color:#fff;transform:translateY(-1px);box-shadow:0 0 0 8px rgba(255,107,53,.16);}
.st-btn-ghost{background:transparent;color:#E9E9F0;border-color:rgba(255,255,255,.28);}
.st-btn-ghost:hover{color:#fff;border-color:rgba(255,255,255,.7);transform:translateY(-1px);}
.st-btn-outline{background:transparent;color:var(--brand);border-color:rgba(108,76,224,.35);}
.st-btn-outline:hover{background:var(--brand-soft);border-color:var(--brand);transform:translateY(-1px);}
.st-btn:disabled,.st-btn.is-disabled{opacity:.45;box-shadow:none;pointer-events:none;}

.st-textlink{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);
  transition:color .18s ease-out;
}
.st-textlink i{transition:transform .18s ease-out;}
.st-textlink:hover{color:var(--brand-ink);}
.st-textlink:hover i{transform:translateX(4px);}

/* ============ 面包屑 ============ */
.st-crumb{background:var(--paper);border-bottom:1px solid var(--line);}
.st-crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:16px 0;font-size:13px;color:var(--text-3);}
.st-crumb li{display:inline-flex;align-items:center;gap:8px;}
.st-crumb li:not(:first-child)::before{content:"/";color:#C9C5BC;}
.st-crumb a{color:var(--text-2);transition:color .18s ease-out;}
.st-crumb a:hover{color:var(--brand);}
.st-crumb [aria-current="page"]{color:var(--ink-900);font-weight:600;}

/* ============ Hero ============ */
.st-hero{
  position:relative;overflow:hidden;
  background:var(--ink-900);
  color:#E9E9F0;
  padding-block:clamp(56px,7vw,104px);
}
.st-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:104px 104px;opacity:.07;
}
.st-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(118deg,rgba(255,255,255,.05) 0 1px,transparent 1px 72px);
  opacity:.5;
}
.st-hero .container{position:relative;z-index:2;}

.st-hero-tag{
  display:inline-flex;align-items:center;gap:12px;
  font-size:13px;letter-spacing:.16em;color:rgba(233,233,240,.72);margin-bottom:22px;
}
.st-hero-tag .st-num{color:#fff;font-weight:800;letter-spacing:.06em;}
.st-hero-tag-line{width:28px;height:2px;background:var(--brand);border-radius:2px;display:inline-block;}

.st-hero h1{color:#fff;max-width:15em;}
.st-hero-sub{
  margin-top:20px;max-width:34em;
  font-size:clamp(16px,1.4vw,18px);line-height:1.75;color:rgba(233,233,240,.82);
}
.st-hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.st-hero-note{
  margin-top:26px;font-size:13px;letter-spacing:.02em;color:rgba(233,233,240,.6);
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
}
.st-hero-note .st-num{color:var(--mint);font-weight:700;}

.st-hero-card{
  position:relative;margin:40px auto 0;max-width:420px;
  aspect-ratio:4/5;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid rgba(255,255,255,.10);
  box-shadow:0 50px 90px -50px rgba(0,0,0,.9);
  animation:stFloat 6s ease-in-out infinite;
}
.st-hero-card img{width:100%;height:100%;object-fit:cover;}
.st-hero-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,12,18,.12) 0%,rgba(11,12,18,0) 42%,rgba(11,12,18,.78) 100%);
}
.st-hero-card figcaption{
  position:absolute;left:20px;right:20px;bottom:18px;z-index:2;
  display:flex;align-items:center;justify-content:space-between;
  color:#fff;font-size:13px;letter-spacing:.02em;
}
.st-hero-card-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.18);
  font-weight:600;
}
.st-hero-card-time{font-weight:700;color:rgba(255,255,255,.86);}
@keyframes stFloat{
  0%,100%{transform:translateY(-6px);}
  50%{transform:translateY(6px);}
}
@media (min-width:992px){
  .st-hero-card{margin:0 0 0 auto;}
}

/* ============ 通用板块 ============ */
.st-section{padding-block:clamp(56px,7vw,100px);}
.st-section-alt{background:rgba(108,76,224,.045);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.st-sec-head{max-width:760px;margin-bottom:clamp(24px,3vw,40px);}
.st-sec-head h2{margin-bottom:12px;}
.st-sec-head p{color:var(--text-2);font-size:16px;}
.st-muted{color:var(--text-2);}

.st-bar-title{
  position:relative;padding-left:18px;
}
.st-bar-title::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;
  background:var(--brand);border-radius:3px;
}

/* ============ 步骤清单 ============ */
.st-steps{border-top:1px solid var(--line);}
.st-step{
  display:flex;align-items:flex-start;gap:clamp(16px,2.4vw,32px);
  padding:26px 12px;border-bottom:1px solid var(--line);
  transition:background-color .2s ease-out,padding-left .2s ease-out;
}
.st-step:hover{background:var(--brand-soft);padding-left:20px;}
.st-step-num{
  flex:none;font-size:clamp(34px,4vw,54px);font-weight:800;line-height:1;
  color:var(--brand);opacity:.24;letter-spacing:-.03em;
  transition:opacity .2s ease-out;
}
.st-step:hover .st-step-num{opacity:.6;}
.st-step-body{flex:1 1 auto;padding-top:4px;}
.st-step-body h3{margin-bottom:6px;font-size:18px;}
.st-step-body p{color:var(--text-2);font-size:15px;max-width:62ch;}
.st-step-arrow{
  flex:none;align-self:center;color:var(--text-3);font-size:15px;
  transition:transform .2s ease-out,color .2s ease-out;
}
.st-step:hover .st-step-arrow{transform:translateX(6px);color:var(--brand);}

/* ============ 卡片 ============ */
.st-card{
  height:100%;display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.st-card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow-2);}
.st-card-media{display:block;aspect-ratio:16/10;overflow:hidden;background:var(--brand-soft);}
.st-card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out;}
.st-card:hover .st-card-media img{transform:scale(1.03);}
.st-card-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.st-card-body h3{font-size:18px;}
.st-card-body h3 a{transition:color .18s ease-out;}
.st-card-body h3 a:hover{color:var(--brand);}
.st-card-body p{color:var(--text-2);font-size:15px;line-height:1.7;}
.st-badge{
  align-self:flex-start;
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand-ink);
  font-size:12px;font-weight:600;letter-spacing:.02em;
}

/* ============ 要点清单 ============ */
.st-notes{border-top:1px solid var(--line);}
.st-note{
  display:flex;gap:18px;padding:22px 0;border-bottom:1px solid var(--line);
}
.st-note-icon{
  flex:none;width:36px;height:36px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-size:15px;
}
.st-note-body h3{font-size:17px;margin-bottom:6px;}
.st-note-body p{color:var(--text-2);font-size:15px;line-height:1.75;}

/* ============ 数据条 ============ */
.st-stats-band{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.st-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding-block:clamp(32px,4vw,52px);
}
.st-stat{display:flex;flex-direction:column;gap:6px;border-left:1px solid var(--line);padding-left:20px;}
.st-stat:first-child{border-left:0;padding-left:0;}
.st-stat-num{
  font-size:clamp(26px,3vw,36px);font-weight:800;line-height:1.1;color:var(--ink-900);
  letter-spacing:-.02em;
}
.st-stat-num em{font-style:normal;font-size:14px;font-weight:600;color:var(--text-3);margin-left:4px;}
.st-stat-label{font-size:13px;color:var(--text-2);}
.st-stat-pos{color:var(--mint);}
@media (max-width:767.98px){
  .st-stats{grid-template-columns:repeat(2,1fr);gap:20px;}
  .st-stat:nth-child(3){border-left:0;padding-left:0;}
}

/* ============ FAQ ============ */
.st-faq{border-top:1px solid var(--line);max-width:920px;}
.st-faq .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line);border-radius:0;}
.st-faq .accordion-header{margin:0;}
.st-faq .accordion-button{
  background:transparent;border:0;box-shadow:none;
  padding:22px 44px 22px 0;
  font-size:17px;font-weight:600;color:var(--ink-900);line-height:1.5;
  transition:color .18s ease-out;
}
.st-faq .accordion-button:not(.collapsed){color:var(--brand);}
.st-faq .accordion-button:hover{color:var(--brand);}
.st-faq .accordion-button:focus{box-shadow:none;outline:2px solid var(--brand);outline-offset:-2px;}
.st-faq .accordion-button::after{
  width:16px;height:16px;background-image:none;flex:none;
  background:
    linear-gradient(var(--brand),var(--brand)) center/16px 2px no-repeat,
    linear-gradient(var(--brand),var(--brand)) center/2px 16px no-repeat;
  transform:rotate(0deg);
  transition:transform .22s ease-out;
  margin-left:auto;
}
.st-faq .accordion-button:not(.collapsed)::after{transform:rotate(45deg);}
.st-faq .accordion-body{
  padding:0 0 24px;color:var(--text-2);font-size:15px;line-height:1.85;max-width:70ch;
}

/* ============ CTA ============ */
.st-cta-block{padding-block:clamp(48px,6vw,88px);background:rgba(108,76,224,.045);border-top:1px solid var(--line);}
.st-cta-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:clamp(26px,3.4vw,44px);
  box-shadow:var(--shadow-1);
}
.st-cta-inner h2{font-size:clamp(20px,2.2vw,28px);margin-bottom:8px;}
.st-cta-inner p{color:var(--text-2);font-size:15px;max-width:52ch;}

.st-sticky-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:1035;
  align-items:center;justify-content:space-between;gap:14px;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:rgba(255,255,255,.96);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-top:1px solid var(--line);
}
.st-sticky-text{font-size:13px;color:var(--text-2);display:flex;align-items:center;gap:8px;}
.st-sticky-text .st-num{color:var(--mint);font-weight:700;}
@media (max-width:991.98px){
  .st-cta-block{display:none;}
  .st-sticky-bar{display:flex;}
  body{padding-bottom:74px;}
}

/* ============ 页脚 ============ */
.st-footer{background:var(--ink-900);color:rgba(255,255,255,.66);border-top:1px solid rgba(255,255,255,.10);padding-top:clamp(48px,6vw,80px);}
.st-footer-grid{--bs-gutter-y:32px;row-gap:32px;}
.st-footer-logo{
  display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;
  font-size:17px;font-weight:800;color:#fff;letter-spacing:-.01em;
}
.st-footer p{font-size:14px;line-height:1.8;max-width:34ch;color:rgba(255,255,255,.62);}
.st-footer h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.02em;}
.st-footer-links{display:flex;flex-direction:column;gap:10px;}
.st-footer-links a{
  font-size:14px;color:rgba(255,255,255,.66);
  transition:color .18s ease-out,transform .18s ease-out;display:inline-block;
}
.st-footer-links a:hover{color:#fff;transform:translateX(3px);}
.st-footer-meta{display:flex;flex-direction:column;gap:10px;font-size:14px;color:rgba(255,255,255,.62);}
.st-sub-form{display:flex;flex-wrap:wrap;gap:10px;}
.st-sub-form input{
  flex:1 1 160px;height:48px;padding:0 16px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);
  border-radius:12px;color:#fff;font-size:14px;
  transition:border-color .18s ease-out,box-shadow .18s ease-out,background-color .18s ease-out;
}
.st-sub-form input::placeholder{color:rgba(255,255,255,.42);}
.st-sub-form input:focus{
  outline:none;border-color:var(--brand);background:rgba(255,255,255,.10);
  box-shadow:0 0 0 3px rgba(108,76,224,.28);
}
.st-sub-form button{
  height:48px;padding:0 22px;border:0;border-radius:12px;cursor:pointer;
  background:var(--accent);color:#fff;font-size:14px;font-weight:600;
  transition:background-color .18s ease-out,transform .18s ease-out;
}
.st-sub-form button:hover{background:var(--accent-ink);transform:translateY(-1px);}
.st-sub-form button:active{transform:translateY(0);}
.st-form-tip{margin-top:12px;font-size:12.5px;color:rgba(255,255,255,.44);}
.st-footer-bottom{
  margin-top:clamp(36px,4vw,56px);padding:20px 0 26px;
  border-top:1px solid rgba(255,255,255,.10);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.44);
}

/* ============ 入场动效 ============ */
.st-reveal{opacity:0;transform:translateY(12px);transition:opacity .24s ease-out,transform .24s ease-out;}
.st-reveal.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *{animation:none !important;transition:none !important;}
  .st-reveal{opacity:1;transform:none;}
}

/* ============ 响应式 ============ */
@media (max-width:991.98px){
  .st-nav-list{display:none;}
  .st-burger{display:inline-flex;}
  .st-nav-right .st-btn{display:none;}
  .st-nav-inner{height:62px;gap:12px;}
}
@media (max-width:575.98px){
  .st-hero-actions .st-btn{width:100%;}
  .st-step{flex-wrap:wrap;}
  .st-step-arrow{display:none;}
  .st-stat{border-left:0;padding-left:0;}
  .st-stats{grid-template-columns:repeat(2,1fr);}
}