/* roulang page: index */
:root{
  --yd-ink:#0B0D10;
  --yd-ink-2:#141821;
  --yd-ink-3:#1C2230;
  --yd-neon:#C6F24E;
  --yd-neon-soft:rgba(198,242,78,.12);
  --yd-neon-line:rgba(198,242,78,.35);
  --yd-flame:#FF6A3D;
  --yd-flame-soft:rgba(255,106,61,.12);
  --yd-paper:#F7F8F6;
  --yd-card:#FFFFFF;
  --yd-line:rgba(11,13,16,.10);
  --yd-line-2:rgba(11,13,16,.06);
  --yd-line-dark:rgba(255,255,255,.10);
  --yd-t1:#0F1216;
  --yd-t2:#5B6470;
  --yd-t1-d:#EDEFF3;
  --yd-t2-d:#98A1AE;
  --yd-r-card:12px;
  --yd-r-btn:6px;
  --yd-r-input:8px;
  --yd-shadow-1:0 1px 2px rgba(11,13,16,.06);
  --yd-shadow-2:0 16px 36px -20px rgba(11,13,16,.30);
  --yd-max:1240px;
  --yd-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --yd-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,Courier,monospace;
  --yd-ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--yd-sans);
  font-size:16.5px;
  line-height:1.85;
  color:var(--yd-t1);
  background:var(--yd-paper);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--yd-neon);outline-offset:2px;}
.y-js .yd-reveal{opacity:0;transform:translateY(12px);}
.yd-reveal.is-in{opacity:1;transform:none;transition:opacity .42s var(--yd-ease),transform .42s var(--yd-ease);}

.yd-container{width:100%;max-width:var(--yd-max);margin:0 auto;padding:0 32px;}
.yd-num{font-family:var(--yd-mono);font-variant-numeric:tabular-nums;letter-spacing:-.02em;}

/* ============ 顶部导航 ============ */
.yd-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  background:rgba(11,13,16,.94);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  transition:height .28s var(--yd-ease),background .28s var(--yd-ease);
}
.yd-header::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,rgba(198,242,78,0) 0%,rgba(198,242,78,.65) 50%,rgba(198,242,78,0) 100%);
}
.yd-nav-wrap{
  height:72px;
  display:flex;
  align-items:center;
  gap:28px;
  transition:height .28s var(--yd-ease);
}
.yd-header.is-scrolled .yd-nav-wrap{height:60px;}
.yd-logo{
  font-size:19px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--yd-t1-d);
  white-space:nowrap;
  display:inline-flex;
  align-items:center;
  gap:2px;
}
.yd-logo span{color:var(--yd-neon);}
.yd-nav{display:flex;align-items:center;gap:6px;margin-left:14px;}
.yd-nav a{
  position:relative;
  display:block;
  padding:8px 12px;
  font-size:15px;
  font-weight:500;
  color:#B9C0CC;
  border-radius:var(--yd-r-btn);
  transition:color .2s var(--yd-ease),background .2s var(--yd-ease);
}
.yd-nav a:hover{color:#FFFFFF;background:rgba(255,255,255,.06);}
.yd-nav a.is-active{color:var(--yd-neon);text-shadow:0 0 12px rgba(198,242,78,.55);}
.yd-nav a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
  background:var(--yd-neon);border-radius:2px;
}
.yd-nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;}
.yd-burger{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--yd-line-dark);
  border-radius:var(--yd-r-btn);
  align-items:center;justify-content:center;
  color:var(--yd-t1-d);
}
.yd-burger i{
  display:block;width:18px;height:2px;background:currentColor;position:relative;
}
.yd-burger i::before,.yd-burger i::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;
}
.yd-burger i::before{top:-6px;}
.yd-burger i::after{top:6px;}

.yd-drawer{
  position:fixed;inset:0;z-index:120;
  background:rgba(6,8,11,.72);
  opacity:0;visibility:hidden;
  transition:opacity .26s var(--yd-ease),visibility .26s var(--yd-ease);
}
.yd-drawer.is-open{opacity:1;visibility:visible;}
.yd-drawer-panel{
  position:absolute;top:0;right:0;bottom:0;
  width:min(84vw,340px);
  background:var(--yd-ink);
  border-left:1px solid var(--yd-line-dark);
  padding:22px 20px 32px;
  transform:translateX(24px);
  transition:transform .3s var(--yd-ease);
  overflow-y:auto;
}
.yd-drawer.is-open .yd-drawer-panel{transform:none;}
.yd-drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.yd-drawer-close{
  width:40px;height:40px;border:1px solid var(--yd-line-dark);border-radius:var(--yd-r-btn);
  color:var(--yd-t1-d);display:flex;align-items:center;justify-content:center;font-size:20px;line-height:1;
}
.yd-drawer nav a{
  display:block;
  line-height:52px;
  padding:0 14px;
  border-left:3px solid transparent;
  color:#B9C0CC;
  font-size:16px;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.yd-drawer nav a.is-active{color:var(--yd-neon);border-left-color:var(--yd-neon);background:rgba(198,242,78,.06);}
.yd-drawer nav a:hover{color:#FFFFFF;background:rgba(255,255,255,.05);}
.yd-drawer-cta{margin-top:20px;}

/* ============ 按钮 ============ */
.yd-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 26px;
  border-radius:var(--yd-r-btn);
  font-size:15px;
  font-weight:700;
  line-height:1;
  border:1px solid transparent;
  transition:transform .2s var(--yd-ease),box-shadow .2s var(--yd-ease),background .2s var(--yd-ease),color .2s var(--yd-ease),border-color .2s var(--yd-ease);
}
.yd-btn-primary{background:var(--yd-neon);color:var(--yd-ink);}
.yd-btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 20px -6px var(--yd-neon);background:#D4FA66;}
.yd-btn-ghost{border-color:var(--yd-neon);color:var(--yd-neon);background:transparent;}
.yd-btn-ghost:hover{background:rgba(198,242,78,.12);transform:translateY(-1px);}
.yd-btn-ink{background:var(--yd-ink);color:#FFFFFF;}
.yd-btn-ink:hover{transform:translateY(-1px);box-shadow:0 0 20px -8px rgba(11,13,16,.6);}
.yd-btn-sm{padding:10px 18px;font-size:14px;}
.yd-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:700;color:var(--yd-neon);
}
.yd-link i{font-style:normal;display:inline-block;transition:transform .2s var(--yd-ease);}
.yd-link:hover i{transform:translateX(4px);}
.yd-link-ink{color:var(--yd-t1);}
.yd-link-ink:hover{color:#0B0D10;}
.yd-link-ink i{transition:transform .2s var(--yd-ease);}

/* ============ 徽章 ============ */
.yd-badge{
  display:inline-flex;align-items:center;
  padding:3px 11px;
  border-radius:999px;
  font-size:13px;
  font-weight:500;
  letter-spacing:.02em;
  background:var(--yd-neon-soft);
  color:#5B7A08;
}
.yd-badge--flame{background:var(--yd-flame-soft);color:#C4471E;}
.yd-badge--dark{background:rgba(198,242,78,.14);color:var(--yd-neon);}
.yd-badge--line{background:transparent;border:1px solid var(--yd-line);color:var(--yd-t2);}

/* ============ Hero ============ */
.yd-hero{
  position:relative;
  background:var(--yd-ink);
  color:var(--yd-t1-d);
  padding:150px 0 0;
  overflow:hidden;
}
.yd-hero-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  opacity:.30;
}
.yd-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,13,16,.86) 0%,rgba(11,13,16,.78) 55%,rgba(11,13,16,.94) 100%);
}
.yd-hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:64px 64px;
  pointer-events:none;
}
.yd-hero-inner{
  position:relative;z-index:2;
  display:grid;
  grid-template-columns:1.35fr .85fr;
  gap:56px;
  align-items:center;
  padding-bottom:64px;
}
.yd-eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:500;
  letter-spacing:.08em;
  color:var(--yd-neon);
  padding:5px 14px;
  border:1px solid var(--yd-neon-line);
  border-radius:999px;
  margin-bottom:22px;
  background:rgba(198,242,78,.06);
}
.yd-hero-title{
  font-size:clamp(34px,4.6vw,56px);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.02em;
  color:#FFFFFF;
}
.yd-hero-title em{font-style:normal;color:var(--yd-neon);}
.yd-hero-sub{
  margin-top:20px;
  font-size:17px;
  line-height:1.8;
  color:#C4CBD6;
  max-width:32em;
}
.yd-hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}

.yd-hero-panel{
  background:rgba(20,24,33,.82);
  border:1px solid var(--yd-line-dark);
  border-radius:var(--yd-r-card);
  padding:24px;
  backdrop-filter:blur(6px);
}
.yd-panel-status{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--yd-t2-d);
  padding-bottom:16px;border-bottom:1px solid var(--yd-line-dark);
}
.yd-dot{width:8px;height:8px;border-radius:50%;background:var(--yd-neon);box-shadow:0 0 10px var(--yd-neon);}
.yd-panel-list{margin-top:16px;display:grid;gap:14px;}
.yd-panel-list li{display:flex;align-items:baseline;justify-content:space-between;gap:12px;}
.yd-panel-list span{font-size:14px;color:#B4BCC8;}
.yd-panel-list b{font-family:var(--yd-mono);font-variant-numeric:tabular-nums;font-size:18px;color:var(--yd-neon);font-weight:700;}
.yd-panel-note{margin-top:18px;font-size:13px;line-height:1.7;color:#8D96A3;}

.yd-hero-strip{
  position:relative;z-index:2;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--yd-line-dark);
  margin-top:8px;
}
.yd-hero-strip li{
  padding:26px 26px 30px;
  border-right:1px solid var(--yd-line-dark);
}
.yd-hero-strip li:last-child{border-right:0;}
.yd-strip-value{display:flex;align-items:baseline;gap:4px;}
.yd-strip-value b{font-family:var(--yd-mono);font-variant-numeric:tabular-nums;font-size:30px;font-weight:700;color:var(--yd-neon);line-height:1;}
.yd-strip-value i{font-style:normal;font-size:14px;color:#B4BCC8;}
.yd-hero-strip p{margin-top:10px;font-size:13.5px;line-height:1.7;color:#8D96A3;}

/* ============ 通用板块 ============ */
.yd-section{padding:96px 0;}
.yd-section--paper{background:var(--yd-paper);}
.yd-section--white{background:#FFFFFF;}
.yd-section--dark{background:var(--yd-ink);color:var(--yd-t1-d);}
.yd-sec-head{max-width:760px;margin-bottom:48px;}
.yd-sec-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.yd-sec-label{
  display:inline-block;font-family:var(--yd-mono);font-size:13px;letter-spacing:.12em;
  color:#7C8794;margin-bottom:14px;
}
.yd-section--dark .yd-sec-label{color:#7E8894;}
.yd-sec-title{
  font-size:clamp(26px,3vw,38px);
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.01em;
}
.yd-sec-title::after{
  content:"";display:block;width:32px;height:3px;background:var(--yd-neon);border-radius:2px;margin-top:18px;
}
.yd-sec-head--center .yd-sec-title::after{margin-left:auto;margin-right:auto;}
.yd-sec-desc{margin-top:16px;font-size:16px;color:var(--yd-t2);}
.yd-section--dark .yd-sec-desc{color:#A6AEBA;}

/* ============ 指标看板 ============ */
.yd-grid{display:grid;gap:24px;}
.yd-grid--4{grid-template-columns:repeat(4,1fr);}
.yd-grid--3{grid-template-columns:repeat(3,1fr);}
.yd-grid--2{grid-template-columns:repeat(2,1fr);}

.yd-metric{
  background:#FFFFFF;
  border:1px solid var(--yd-line);
  border-radius:var(--yd-r-card);
  padding:26px 24px 24px;
  box-shadow:var(--yd-shadow-1);
  transition:transform .25s var(--yd-ease),border-color .25s var(--yd-ease),box-shadow .25s var(--yd-ease);
}
.yd-metric:hover{transform:translateY(-4px);border-color:var(--yd-neon);box-shadow:var(--yd-shadow-2);}
.yd-metric-value{display:flex;align-items:baseline;gap:4px;}
.yd-metric-value b{font-family:var(--yd-mono);font-variant-numeric:tabular-nums;font-size:38px;font-weight:700;line-height:1;color:var(--yd-t1);letter-spacing:-.03em;}
.yd-metric-value i{font-style:normal;font-size:14px;color:var(--yd-t2);}
.yd-metric-name{margin-top:12px;font-size:16px;font-weight:700;}
.yd-metric-note{margin-top:8px;font-size:13.5px;line-height:1.7;color:var(--yd-t2);}
.yd-bar-track{margin-top:18px;height:6px;border-radius:999px;background:rgba(11,13,16,.08);overflow:hidden;}
.yd-bar-fill{height:100%;border-radius:999px;background:var(--yd-neon);}
.yd-bar-fill--flame{background:var(--yd-flame);}

/* ============ 服务矩阵 ============ */
.yd-matrix{display:grid;grid-template-columns:1.08fr 1fr;gap:24px;align-items:stretch;}
.yd-matrix-right{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.yd-matrix-right .yd-svc-card:first-child{grid-column:1 / -1;}
.yd-svc-card{
  position:relative;
  background:#FFFFFF;
  border:1px solid var(--yd-line);
  border-radius:var(--yd-r-card);
  padding:28px;
  box-shadow:var(--yd-shadow-1);
  display:flex;flex-direction:column;
  transition:transform .25s var(--yd-ease),border-color .25s var(--yd-ease),box-shadow .25s var(--yd-ease);
}
.yd-svc-card:hover{transform:translateY(-4px);border-color:var(--yd-neon);box-shadow:var(--yd-shadow-2);}
.yd-svc-icon{
  width:44px;height:44px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:var(--yd-neon-soft);
  color:#5B7A08;
  font-family:var(--yd-mono);font-weight:700;font-size:15px;
  margin-bottom:20px;
}
.yd-svc-icon--flame{background:var(--yd-flame-soft);color:#C4471E;}
.yd-svc-card h3{font-size:20px;line-height:1.4;font-weight:700;}
.yd-svc-card p{margin-top:10px;font-size:15px;line-height:1.8;color:var(--yd-t2);}
.yd-svc-card .yd-link{margin-top:auto;padding-top:20px;}
.yd-svc-card--lg{padding:0;overflow:hidden;}
.yd-svc-media{aspect-ratio:16/9;background:var(--yd-ink);overflow:hidden;}
.yd-svc-media img{width:100%;height:100%;object-fit:cover;opacity:.86;}
.yd-svc-body{padding:28px;}
.yd-svc-card--lg p{max-width:34em;}

/* ============ 结果对比 ============ */
.yd-compare{
  border:1px solid var(--yd-line);
  border-radius:var(--yd-r-card);
  background:#FFFFFF;
  overflow:hidden;
  box-shadow:var(--yd-shadow-1);
}
.yd-cmp-head{
  display:grid;grid-template-columns:1.1fr 2fr 90px;
  gap:20px;padding:16px 28px;
  background:rgba(11,13,16,.03);
  border-bottom:1px solid var(--yd-line);
  font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--yd-t2);
}
.yd-cmp-row{
  display:grid;grid-template-columns:1.1fr 2fr 90px;
  gap:20px;padding:24px 28px;
  border-bottom:1px solid var(--yd-line-2);
  align-items:center;
  transition:background .2s var(--yd-ease);
}
.yd-cmp-row:last-child{border-bottom:0;}
.yd-cmp-row:hover{background:rgba(198,242,78,.05);}
.yd-cmp-name{font-size:15.5px;font-weight:700;}
.yd-cmp-track{display:grid;gap:10px;}
.yd-cmp-line{display:grid;grid-template-columns:64px 1fr 74px;align-items:center;gap:12px;}
.yd-cmp-tag{font-size:13px;color:var(--yd-t2);}
.yd-cmp-barwrap{height:10px;border-radius:999px;background:rgba(11,13,16,.07);overflow:hidden;}
.yd-cmp-bar{display:block;height:100%;border-radius:999px;background:var(--yd-neon);}
.yd-cmp-bar--base{background:rgba(11,13,16,.22);}
.yd-cmp-val{font-family:var(--yd-mono);font-variant-numeric:tabular-nums;font-size:14px;color:var(--yd-t2);text-align:right;}
.yd-cmp-delta{
  justify-self:end;
  font-family:var(--yd-mono);font-variant-numeric:tabular-nums;
  font-size:13px;font-weight:700;
  padding:4px 10px;border-radius:999px;
  background:var(--yd-neon-soft);color:#5B7A08;
}
.yd-cmp-foot{padding:18px 28px;font-size:13px;color:var(--yd-t2);background:rgba(11,13,16,.03);border-top:1px solid var(--yd-line);}

/* ============ 资讯卡片 ============ */
.yd-post-card{
  height:100%;
  display:flex;flex-direction:column;
  background:#FFFFFF;
  border:1px solid var(--yd-line);
  border-radius:var(--yd-r-card);
  overflow:hidden;
  box-shadow:var(--yd-shadow-1);
  transition:transform .25s var(--yd-ease),border-color .25s var(--yd-ease),box-shadow .25s var(--yd-ease);
}
.yd-post-card:hover{transform:translateY(-4px);border-color:var(--yd-neon);box-shadow:var(--yd-shadow-2);}
.yd-post-cover{display:block;aspect-ratio:16/9;background:var(--yd-ink);overflow:hidden;}
.yd-post-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--yd-ease);}
.yd-post-card:hover .yd-post-cover img{transform:scale(1.04);}
.yd-post-body{padding:24px;display:flex;flex-direction:column;flex:1;}
.yd-post-meta{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.yd-post-time{font-family:var(--yd-mono);font-variant-numeric:tabular-nums;font-size:13px;color:var(--yd-t2);}
.yd-post-card h3{font-size:19px;line-height:1.45;font-weight:700;}
.yd-post-card h3 a{transition:color .2s var(--yd-ease);}
.yd-post-card h3 a:hover{color:#4C6A05;}
.yd-post-summary{
  margin-top:10px;font-size:14.5px;line-height:1.75;color:var(--yd-t2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.yd-post-body .yd-link{margin-top:auto;padding-top:18px;}
.yd-empty{
  text-align:center;
  padding:56px 24px;
  border:1px dashed var(--yd-line);
  border-radius:var(--yd-r-card);
  background:#FFFFFF;
}
.yd-empty-icon{
  width:48px;height:48px;margin:0 auto 16px;border-radius:50%;
  border:1px solid var(--yd-neon-line);
  display:flex;align-items:center;justify-content:center;
  color:#5B7A08;font-family:var(--yd-mono);font-size:20px;
}
.yd-empty p{color:var(--yd-t2);font-size:15px;}
.yd-empty .yd-btn{margin-top:20px;}

/* ============ 社会认同 ============ */
.yd-proof{
  background:var(--yd-ink-2);
  border:1px solid var(--yd-line-dark);
  border-radius:var(--yd-r-card);
  padding:26px;
}
.yd-proof h3{font-size:17px;font-weight:700;color:var(--yd-t1-d);}
.yd-proof p{margin-top:12px;font-size:15px;line-height:1.8;color:#A6AEBA;}
.yd-proof-meta{margin-top:18px;font-family:var(--yd-mono);font-variant-numeric:tabular-nums;font-size:13px;color:var(--yd-neon);}
.yd-proof-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--yd-line-dark);border:1px solid var(--yd-line-dark);border-radius:var(--yd-r-card);overflow:hidden;margin-top:24px;}
.yd-proof-stats div{background:var(--yd-ink);padding:24px;}
.yd-proof-stats b{display:block;font-family:var(--yd-mono);font-variant-numeric:tabular-nums;font-size:28px;color:var(--yd-neon);line-height:1;}
.yd-proof-stats span{display:block;margin-top:10px;font-size:13.5px;color:#98A1AE;}

/* ============ FAQ ============ */
.yd-faq{border-top:1px solid var(--yd-line);}
.yd-faq-item{border-bottom:1px solid var(--yd-line);}
.yd-faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:64px;padding:18px 4px;
  text-align:left;
  font-size:16.5px;font-weight:700;
  color:var(--yd-t1);
  transition:color .2s var(--yd-ease),background .2s var(--yd-ease);
}
.yd-faq-q:hover{color:#4C6A05;}
.yd-faq-icon{
  position:relative;flex:0 0 18px;width:18px;height:18px;
}
.yd-faq-icon::before,.yd-faq-icon::after{
  content:"";position:absolute;left:0;top:8px;width:18px;height:2px;background:currentColor;border-radius:2px;
  transition:transform .25s var(--yd-ease),opacity .25s var(--yd-ease);
}
.yd-faq-icon::after{transform:rotate(90deg);}
.yd-faq-item.is-open .yd-faq-icon::after{transform:rotate(0);opacity:0;}
.yd-faq-item.is-open{
  border-left:3px solid var(--yd-neon);
  padding-left:16px;
  background:rgba(198,242,78,.05);
}
.yd-faq-a{max-width:820px;padding:0 0 24px;font-size:15.5px;line-height:1.85;color:var(--yd-t2);}
.yd-faq-a p + p{margin-top:12px;}

/* ============ CTA 表单 ============ */
.yd-cta{
  position:relative;
  background:var(--yd-ink);
  color:var(--yd-t1-d);
  overflow:hidden;
}
.yd-cta-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  opacity:.18;
}
.yd-cta::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,13,16,.88),rgba(11,13,16,.96));
}
.yd-cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:start;}
.yd-cta h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.3;}
.yd-cta h2::after{content:"";display:block;width:32px;height:3px;background:var(--yd-neon);border-radius:2px;margin-top:18px;}
.yd-cta p.yd-cta-desc{margin-top:18px;font-size:16px;line-height:1.85;color:#A6AEBA;max-width:30em;}
.yd-cta-list{margin-top:28px;display:grid;gap:12px;}
.yd-cta-list li{display:flex;gap:10px;font-size:15px;color:#C4CBD6;}
.yd-cta-list li::before{content:"";flex:0 0 6px;width:6px;height:6px;margin-top:10px;border-radius:50%;background:var(--yd-neon);}

.yd-form{
  background:rgba(20,24,33,.9);
  border:1px solid var(--yd-line-dark);
  border-radius:var(--yd-r-card);
  padding:28px;
}
.yd-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.yd-field{display:flex;flex-direction:column;gap:8px;}
.yd-field--full{grid-column:1 / -1;}
.yd-field label{font-size:13px;font-weight:600;color:#B4BCC8;letter-spacing:.02em;}
.yd-field input,.yd-field select,.yd-field textarea{
  width:100%;
  padding:14px;
  border-radius:var(--yd-r-input);
  border:1px solid var(--yd-line-dark);
  background:rgba(11,13,16,.6);
  color:var(--yd-t1-d);
  transition:border-color .2s var(--yd-ease),box-shadow .2s var(--yd-ease),background .2s var(--yd-ease);
}
.yd-field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#98A1AE 50%),linear-gradient(135deg,#98A1AE 50%,transparent 50%);background-position:calc(100% - 20px) 22px,calc(100% - 14px) 22px;background-size:6px 6px,6px 6px;background-repeat:no-repeat;}
.yd-field textarea{min-height:112px;resize:vertical;}
.yd-field input::placeholder,.yd-field textarea::placeholder{color:#6C7683;}
.yd-field input:focus,.yd-field select:focus,.yd-field textarea:focus{
  outline:none;
  border-color:var(--yd-neon);
  box-shadow:0 0 0 3px rgba(198,242,78,.16);
  background:rgba(11,13,16,.8);
}
.yd-form-note{margin-top:16px;font-size:13px;line-height:1.7;color:#8D96A3;}
.yd-form-error{margin-top:12px;font-size:13.5px;color:#FF7A66;display:none;}
.yd-form-error.is-show{display:block;}
.yd-form .yd-btn{width:100%;margin-top:20px;}
.yd-form-ok{margin-top:16px;font-size:14px;color:var(--yd-neon);display:none;}
.yd-form-ok.is-show{display:block;}

/* ============ 页脚 ============ */
.yd-footer{background:var(--yd-ink);color:#98A1AE;padding:72px 0 0;}
.yd-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;}
.yd-footer-brand .yd-logo{font-size:20px;}
.yd-footer-brand p{margin-top:16px;font-size:14.5px;line-height:1.8;max-width:26em;}
.yd-footer h4{font-size:14px;font-weight:700;color:#DDE2E9;letter-spacing:.04em;margin-bottom:16px;}
.yd-footer ul{display:grid;gap:10px;}
.yd-footer ul a{font-size:14.5px;color:#98A1AE;transition:color .2s var(--yd-ease);}
.yd-footer ul a:hover{color:var(--yd-neon);}
.yd-footer-contact li{font-size:14.5px;line-height:1.7;}
.yd-footer-bottom{
  margin-top:56px;
  padding:22px 0 28px;
  border-top:1px solid rgba(198,242,78,.28);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13.5px;color:#7C8794;
}
.yd-footer-bottom .yd-domain{font-family:var(--yd-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .yd-container{padding:0 28px;}
  .yd-hero-inner{gap:40px;}
}
@media (max-width:1023px){
  .yd-container{padding:0 24px;}
  .yd-section{padding:72px 0;}
  .yd-nav{display:none;}
  .yd-burger{display:flex;}
  .yd-nav-right .yd-btn{display:none;}
  .yd-hero{padding-top:130px;}
  .yd-hero-inner{grid-template-columns:1fr;gap:36px;padding-bottom:48px;}
  .yd-hero-strip{grid-template-columns:repeat(2,1fr);}
  .yd-hero-strip li{border-bottom:1px solid var(--yd-line-dark);}
  .yd-hero-strip li:nth-child(2n){border-right:0;}
  .yd-grid--4{grid-template-columns:repeat(2,1fr);}
  .yd-grid--3{grid-template-columns:repeat(2,1fr);}
  .yd-matrix{grid-template-columns:1fr;}
  .yd-cta-inner{grid-template-columns:1fr;gap:40px;}
  .yd-footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .yd-section{padding:48px 0;}
  .yd-sec-head{margin-bottom:32px;}
  .yd-grid--4,.yd-grid--3,.yd-grid--2{grid-template-columns:1fr;}
  .yd-matrix-right{grid-template-columns:1fr;}
  .yd-cmp-head{display:none;}
  .yd-cmp-row{grid-template-columns:1fr;gap:14px;padding:20px;}
  .yd-cmp-delta{justify-self:start;}
  .yd-proof-stats{grid-template-columns:1fr;}
  .yd-form-grid{grid-template-columns:1fr;}
  .yd-cta-list li{font-size:14.5px;}
  .yd-hero-strip{grid-template-columns:1fr;}
  .yd-hero-strip li{border-right:0;}
}
@media (max-width:519px){
  .yd-container{padding:0 20px;}
  .yd-hero{padding-top:112px;}
  .yd-hero-cta{flex-direction:column;align-items:stretch;}
  .yd-hero-cta .yd-btn{width:100%;}
  .yd-btn{padding:13px 20px;}
  .yd-cmp-line{grid-template-columns:52px 1fr 64px;gap:8px;}
  .yd-footer-grid{grid-template-columns:1fr;}
  .yd-footer-bottom{flex-direction:column;}
  .yd-svc-card,.yd-metric,.yd-form{padding:20px;}
  .yd-svc-body{padding:20px;}
  .yd-post-body{padding:20px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .y-js .yd-reveal{opacity:1;transform:none;}
}

/* roulang page: article */
:root{
  --yd-ink:#0B0D10;
  --yd-ink-2:#141821;
  --yd-neon:#C6F24E;
  --yd-flame:#FF6A3D;
  --yd-paper:#F7F8F6;
  --yd-card:#FFFFFF;
  --yd-line:rgba(11,13,16,.10);
  --yd-line-dark:rgba(255,255,255,.10);
  --yd-t1:#0F1216;
  --yd-t2:#5B6470;
  --yd-t1-dark:#EDEFF3;
  --yd-radius:12px;
  --yd-radius-sm:6px;
  --yd-radius-input:8px;
  --yd-shadow:0 1px 2px rgba(11,13,16,.06);
  --yd-shadow-lg:0 16px 36px -20px rgba(11,13,16,.30);
  --yd-font:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --yd-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--yd-font);
  font-size:16.5px;
  line-height:1.85;
  color:var(--yd-t1);
  background:var(--yd-paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none}
input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding-left:1.25em}
:focus-visible{outline:2px solid var(--yd-neon);outline-offset:2px}
.yd-container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.yd-mono{font-family:var(--yd-mono);font-variant-numeric:tabular-nums}

/* ---------- 顶栏 ---------- */
.yd-header{
  position:sticky;top:0;z-index:80;
  background:var(--yd-ink);
  border-bottom:1px solid var(--yd-line-dark);
  transition:height .25s ease,background .25s ease;
}
.yd-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,rgba(198,242,78,0) 0%,rgba(198,242,78,.7) 50%,rgba(198,242,78,0) 100%);
}
.yd-nav-wrap{display:flex;align-items:center;gap:28px;height:72px;transition:height .25s ease}
.yd-header.is-scrolled{backdrop-filter:blur(10px);background:rgba(11,13,16,.94)}
.yd-header.is-scrolled .yd-nav-wrap{height:60px}
.yd-logo{font-size:20px;font-weight:800;letter-spacing:.01em;color:#fff;white-space:nowrap}
.yd-logo span{color:var(--yd-neon)}
.yd-nav{display:flex;align-items:center;gap:6px;margin-left:12px}
.yd-nav a{
  position:relative;display:inline-flex;align-items:center;height:72px;
  padding:0 14px;font-size:15px;font-weight:500;color:rgba(237,239,243,.78);
  transition:color .2s ease;
}
.yd-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:18px;height:2px;
  background:var(--yd-neon);transform:scaleX(0);transform-origin:left;
  transition:transform .25s ease;
}
.yd-nav a:hover{color:#fff}
.yd-nav a:hover::after{transform:scaleX(1)}
.yd-nav a.is-active{color:var(--yd-neon);box-shadow:0 0 12px -2px var(--yd-neon)}
.yd-nav a.is-active::after{transform:scaleX(1)}
.yd-nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.yd-burger{display:none;width:40px;height:40px;border:1px solid var(--yd-line-dark);border-radius:var(--yd-radius-sm);position:relative}
.yd-burger i,.yd-burger i::before,.yd-burger i::after{
  content:"";position:absolute;left:11px;width:18px;height:2px;background:#fff;transition:.2s ease;
}
.yd-burger i{top:19px}
.yd-burger i::before{top:-6px;left:0}
.yd-burger i::after{top:6px;left:0}
.yd-drawer{
  position:fixed;inset:0;z-index:120;background:var(--yd-ink);
  transform:translateX(100%);transition:transform .3s cubic-bezier(.22,.61,.36,1);
  display:flex;flex-direction:column;
}
.yd-drawer.is-open{transform:translateX(0)}
.yd-drawer-head{display:flex;align-items:center;justify-content:space-between;height:64px;padding:0 20px;border-bottom:1px solid var(--yd-line-dark)}
.yd-drawer-close{width:40px;height:40px;border:1px solid var(--yd-line-dark);border-radius:var(--yd-radius-sm);color:#fff;font-size:18px;line-height:1}
.yd-drawer-nav{display:flex;flex-direction:column;padding:12px 0}
.yd-drawer-nav a{color:rgba(237,239,243,.86);padding:0 20px;line-height:52px;font-size:16px;border-left:3px solid transparent}
.yd-drawer-nav a.is-active{color:var(--yd-neon);border-left-color:var(--yd-neon);background:rgba(198,242,78,.06)}
.yd-drawer-cta{padding:16px 20px 28px}

/* ---------- 按钮 ---------- */
.yd-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:var(--yd-radius-sm);font-weight:700;font-size:15px;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;
}
.yd-btn-primary{background:var(--yd-neon);color:var(--yd-ink)}
.yd-btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 20px -6px var(--yd-neon)}
.yd-btn-ghost{background:transparent;border:1px solid var(--yd-neon);color:var(--yd-neon)}
.yd-btn-ghost:hover{background:rgba(198,242,78,.12)}
.yd-btn-sm{padding:10px 18px;font-size:14px}
.yd-btn-dark{background:var(--yd-ink);color:#fff}
.yd-btn-dark:hover{transform:translateY(-1px);box-shadow:0 0 20px -6px rgba(11,13,16,.6)}

/* ---------- 文章头部 ---------- */
.yd-page-hero{
  background:var(--yd-ink);color:var(--yd-t1-dark);
  padding:56px 0 64px;position:relative;overflow:hidden;
}
.yd-page-hero::before{
  content:"";position:absolute;inset:0;
  background:url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  opacity:.16;
}
.yd-page-hero .yd-container{position:relative;z-index:1}
.yd-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(237,239,243,.62);margin-bottom:22px}
.yd-crumb a{color:rgba(237,239,243,.82);background-image:linear-gradient(90deg,var(--yd-neon),var(--yd-neon));background-repeat:no-repeat;background-size:0 1px;background-position:0 100%;transition:background-size .3s ease}
.yd-crumb a:hover{background-size:100% 1px;color:#fff}
.yd-crumb span{opacity:.4}
.yd-crumb em{font-style:normal;color:rgba(237,239,243,.66);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.yd-badge{
  display:inline-flex;align-items:center;padding:5px 14px;border-radius:999px;
  font-size:13px;font-weight:600;letter-spacing:.02em;
  background:rgba(198,242,78,.12);color:var(--yd-neon);margin-bottom:18px;
}
.yd-page-hero h1{
  font-size:clamp(28px,3.4vw,42px);font-weight:800;line-height:1.22;
  letter-spacing:-.02em;max-width:900px;color:#fff;
}
.yd-meta{display:flex;flex-wrap:wrap;gap:18px;margin-top:26px;font-size:13.5px;color:rgba(237,239,243,.6)}
.yd-meta span{font-family:var(--yd-mono);font-variant-numeric:tabular-nums}

/* ---------- 板块 ---------- */
.yd-section{padding:88px 0}
.yd-section--tight{padding:64px 0 88px}
.yd-section-head{margin-bottom:40px}
.yd-h2{font-size:clamp(26px,3vw,38px);font-weight:700;line-height:1.25}
.yd-h2::after{content:"";display:block;width:32px;height:3px;background:var(--yd-neon);margin-top:16px}
.yd-section-sub{margin-top:14px;font-size:14px;color:var(--yd-t2);max-width:68ch}

/* ---------- 正文布局 ---------- */
.yd-article-layout{display:grid;grid-template-columns:minmax(0,760px) 240px;gap:56px;justify-content:center}
.yd-article-body{font-size:17px;line-height:1.9;color:var(--yd-t1);min-width:0}
.yd-article-body>*+*{margin-top:1.1em}
.yd-article-body p{margin:1.1em 0}
.yd-article-body h2{
  font-size:clamp(22px,2.4vw,28px);font-weight:700;line-height:1.35;
  margin:2.2em 0 .7em;
}
.yd-article-body h2::after{content:"";display:block;width:32px;height:3px;background:var(--yd-neon);margin-top:12px}
.yd-article-body h3{font-size:20px;font-weight:700;line-height:1.4;margin:1.8em 0 .6em}
.yd-article-body h4{font-size:17px;font-weight:700;margin:1.5em 0 .5em}
.yd-article-body ul,.yd-article-body ol{margin:1.1em 0;padding-left:1.35em}
.yd-article-body li{margin:.45em 0}
.yd-article-body li::marker{color:#8A9440}
.yd-article-body blockquote{
  margin:1.6em 0;padding:18px 24px;background:rgba(198,242,78,.10);
  border-left:3px solid var(--yd-neon);border-radius:0 var(--yd-radius) var(--yd-radius) 0;
  color:#2A3320;
}
.yd-article-body blockquote p{margin:0}
.yd-article-body img{border-radius:var(--yd-radius);margin:1.6em auto;box-shadow:var(--yd-shadow-lg)}
.yd-article-body figure{margin:1.6em 0}
.yd-article-body figcaption{font-size:13.5px;color:var(--yd-t2);text-align:center;margin-top:10px}
.yd-article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15.5px;border:1px solid var(--yd-line);border-radius:var(--yd-radius);overflow:hidden}
.yd-article-body th,.yd-article-body td{padding:12px 14px;border:1px solid var(--yd-line);text-align:left}
.yd-article-body th{background:#F1F3EE;font-weight:700;font-size:14.5px}
.yd-article-body a{
  color:var(--yd-t1);font-weight:500;
  border-bottom:1px solid rgba(11,13,16,.25);
  background-image:linear-gradient(90deg,var(--yd-neon),var(--yd-neon));
  background-repeat:no-repeat;background-size:0 2px;background-position:0 100%;
  transition:background-size .3s ease;
}
.yd-article-body a:hover{background-size:100% 2px}
.yd-article-body hr{border:0;border-top:1px solid var(--yd-line);margin:2.4em 0}
.yd-article-body code{
  font-family:var(--yd-mono);font-size:.92em;background:#EFF1EC;
  padding:2px 6px;border-radius:4px;
}

/* 目录 */
.yd-toc{position:sticky;top:100px;align-self:start;font-size:14px}
.yd-toc h4{font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--yd-t2);margin-bottom:14px}
.yd-toc ul{list-style:none;margin:0;padding:0;border-left:1px solid var(--yd-line)}
.yd-toc li{margin:0}
.yd-toc a{display:block;padding:8px 12px;color:var(--yd-t2);border-left:2px solid transparent;margin-left:-1px;transition:color .2s ease,border-color .2s ease,background .2s ease}
.yd-toc a:hover{color:var(--yd-t1);background:rgba(11,13,16,.03)}
.yd-toc a.is-active{color:var(--yd-t1);font-weight:600;border-left-color:var(--yd-neon);background:rgba(198,242,78,.10)}

/* 中段 CTA */
.yd-inline-cta{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  margin:2.4em 0;padding:24px 28px;border-radius:var(--yd-radius);
  background:var(--yd-ink);color:var(--yd-t1-dark);border:1px solid var(--yd-line-dark);
}
.yd-inline-cta p{font-size:15.5px;line-height:1.7;margin:0;max-width:52ch}
.yd-inline-cta strong{color:var(--yd-neon);font-weight:700}

/* ---------- 卡片 ---------- */
.yd-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.yd-card{
  display:flex;flex-direction:column;background:var(--yd-card);
  border:1px solid var(--yd-line);border-radius:var(--yd-radius);
  overflow:hidden;box-shadow:var(--yd-shadow);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.yd-card:hover{transform:translateY(-4px);border-color:var(--yd-neon);box-shadow:var(--yd-shadow-lg)}
.yd-card-media{aspect-ratio:16/9;background:var(--yd-ink);overflow:hidden}
.yd-card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.yd-card:hover .yd-card-media img{transform:scale(1.04)}
.yd-card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.yd-card-body h3{font-size:19px;font-weight:700;line-height:1.4}
.yd-card-body p{font-size:15px;color:var(--yd-t2);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.yd-tag{
  display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;background:rgba(255,106,61,.12);color:#C6431B;letter-spacing:.02em;
}
.yd-card-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;font-size:13px;color:var(--yd-t2)}
.yd-card-meta time{font-family:var(--yd-mono);font-variant-numeric:tabular-nums}
.yd-link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--yd-t1)}
.yd-link-arrow span{transition:transform .2s ease}
.yd-link-arrow:hover span{transform:translateX(4px)}

/* 空态 */
.yd-empty{
  border:1px dashed var(--yd-line);border-radius:var(--yd-radius);
  background:var(--yd-card);padding:56px 28px;text-align:center;
}
.yd-empty-title{font-size:20px;font-weight:700}
.yd-empty-desc{font-size:15px;color:var(--yd-t2);margin:10px 0 24px}

/* 返回入口 */
.yd-article-foot{display:flex;flex-wrap:wrap;gap:14px;margin-top:8px}

/* ---------- 页脚 ---------- */
.yd-footer{background:var(--yd-ink);color:rgba(237,239,243,.72);padding:72px 0 0;margin-top:0}
.yd-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.yd-footer-brand p{font-size:14.5px;line-height:1.8;margin-top:16px;max-width:34ch;color:rgba(237,239,243,.6)}
.yd-footer h4{font-size:14px;font-weight:700;color:#fff;letter-spacing:.04em;margin-bottom:18px}
.yd-footer ul{list-style:none;margin:0;padding:0}
.yd-footer li{margin-bottom:12px;font-size:14.5px}
.yd-footer ul a{color:rgba(237,239,243,.72);transition:color .2s ease}
.yd-footer ul a:hover{color:var(--yd-neon)}
.yd-footer-contact{font-family:var(--yd-mono);font-variant-numeric:tabular-nums;font-size:14px}
.yd-footer-bottom{
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
  padding:22px 0 30px;border-top:1px solid var(--yd-line-dark);font-size:13px;
  color:rgba(237,239,243,.5);
}
.yd-footer-bottom::before{
  content:"";position:absolute;
}
.yd-domain{font-family:var(--yd-mono)}

/* 动效 */
.reveal{opacity:0;transform:translateY(12px)}
.reveal.is-in{opacity:1;transform:translateY(0);transition:opacity .42s cubic-bezier(.22,.61,.36,1),transform .42s cubic-bezier(.22,.61,.36,1)}
@media (prefers-reduced-motion:reduce){
  .reveal,.reveal.is-in{opacity:1;transform:none;transition:none}
  .yd-card:hover{transform:none}
  .yd-btn:hover{transform:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .yd-container{padding:0 24px}
  .yd-article-layout{gap:40px;grid-template-columns:minmax(0,1fr) 220px}
}
@media (max-width:1023px){
  .yd-nav{display:none}
  .yd-burger{display:block}
  .yd-nav-right .yd-btn-sm{display:none}
  .yd-article-layout{grid-template-columns:minmax(0,1fr)}
  .yd-toc{display:none}
  .yd-card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .yd-section{padding:72px 0}
  .yd-footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:767px){
  .yd-container{padding:0 20px}
  .yd-nav-wrap{height:64px}
  .yd-header.is-scrolled .yd-nav-wrap{height:56px}
  .yd-page-hero{padding:40px 0 48px}
  .yd-section{padding:48px 0}
  .yd-card-grid{grid-template-columns:minmax(0,1fr)}
  .yd-inline-cta{flex-direction:column;align-items:flex-start;padding:22px}
  .yd-inline-cta .yd-btn{width:100%}
  .yd-article-body{font-size:16.5px}
  .yd-article-body table{font-size:14.5px}
  .yd-footer{padding-top:56px}
  .yd-footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .yd-article-foot .yd-btn{width:100%}
}
@media (max-width:519px){
  .yd-container{padding:0 16px}
  .yd-logo{font-size:18px}
  .yd-page-hero h1{font-size:26px}
  .yd-crumb em{max-width:180px}
  .yd-meta{gap:12px;font-size:13px}
}

/* roulang page: category1 */
:root{
  --yd-ink:#0B0D10;
  --yd-ink-2:#141821;
  --yd-neon:#C6F24E;
  --yd-neon-deep:#3F5C00;
  --yd-flame:#FF6A3D;
  --yd-flame-deep:#B23A15;
  --yd-paper:#F7F8F6;
  --yd-card:#FFFFFF;
  --yd-line:rgba(11,13,16,.10);
  --yd-line-d:rgba(255,255,255,.10);
  --yd-t1:#0F1216;
  --yd-t2:#5B6470;
  --yd-t1-d:#EDEFF3;
  --yd-t2-d:rgba(237,239,243,.62);
  --yd-r-card:12px;
  --yd-r-btn:6px;
  --yd-r-input:8px;
  --yd-shadow:0 1px 2px rgba(11,13,16,.06);
  --yd-shadow-hover:0 16px 36px -20px rgba(11,13,16,.30);
  --yd-ease:cubic-bezier(.22,.61,.36,1);
  --yd-section:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--yd-t1);
  background:var(--yd-paper);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:inherit;color:inherit;margin:0}
h1{font-size:clamp(30px,3.9vw,48px);font-weight:800;line-height:1.16;letter-spacing:-.02em}
h2{font-size:clamp(26px,3vw,38px);font-weight:700;line-height:1.25;letter-spacing:-.01em}
h3{font-size:20px;font-weight:700;line-height:1.4}
p{margin:0}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--yd-neon);outline-offset:2px;border-radius:4px}
.yd-mono{font-family:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;font-variant-numeric:tabular-nums;letter-spacing:.01em}
.yd-container{max-width:1240px;margin:0 auto;padding:0 32px}
.yd-section{padding:var(--yd-section) 0}
.yd-section-alt{background:#fff;border-top:1px solid var(--yd-line);border-bottom:1px solid var(--yd-line)}
.yd-section-head{margin-bottom:44px;max-width:760px}
.yd-section-head .yd-bar-line{width:32px;height:3px;background:var(--yd-neon);border-radius:2px;margin-bottom:18px}
.yd-section-head p{margin-top:14px;font-size:15px;color:var(--yd-t2)}

/* ============ 导航 ============ */
.yd-header{
  position:sticky;top:0;z-index:60;
  background:var(--yd-ink);
  border-bottom:1px solid var(--yd-line-d);
  transition:height .25s var(--yd-ease);
}
.yd-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(198,242,78,.7),transparent);
  pointer-events:none;
}
.yd-nav-wrap{display:flex;align-items:center;gap:24px;height:72px;transition:height .25s var(--yd-ease)}
.yd-header.is-shrink .yd-nav-wrap{height:60px}
.yd-header.is-shrink{backdrop-filter:blur(8px);background:rgba(11,13,16,.94)}
.yd-logo{
  font-size:20px;font-weight:800;letter-spacing:.02em;color:#fff;
  white-space:nowrap;flex:0 0 auto;
}
.yd-logo span{color:var(--yd-neon)}
.yd-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.yd-nav a{
  position:relative;display:block;padding:10px 14px;font-size:15px;font-weight:500;
  color:rgba(237,239,243,.74);border-radius:var(--yd-r-btn);
  transition:color .2s,background .2s;
}
.yd-nav a:hover{color:#fff;background:rgba(255,255,255,.06)}
.yd-nav a.is-active{color:var(--yd-neon);box-shadow:0 0 12px -2px var(--yd-neon)}
.yd-nav a.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--yd-neon);border-radius:2px;
}
.yd-nav-right{display:flex;align-items:center;gap:12px;margin-left:8px}
.yd-burger{
  display:none;width:42px;height:42px;border-radius:var(--yd-r-btn);
  background:transparent;border:1px solid var(--yd-line-d);cursor:pointer;position:relative;
}
.yd-burger i,.yd-burger i::before,.yd-burger i::after{
  content:"";position:absolute;left:11px;width:20px;height:2px;background:var(--yd-neon);border-radius:2px;
  transition:transform .25s var(--yd-ease);
}
.yd-burger i{top:20px}
.yd-burger i::before{top:-6px;left:0}
.yd-burger i::after{top:6px;left:0}

/* 抽屉 */
.yd-scrim{
  position:fixed;inset:0;background:rgba(11,13,16,.62);opacity:0;visibility:hidden;
  transition:opacity .28s var(--yd-ease),visibility .28s;z-index:70;
}
.yd-scrim.is-open{opacity:1;visibility:visible}
.yd-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:80;
  background:var(--yd-ink);border-left:1px solid var(--yd-line-d);
  padding:22px 20px;overflow-y:auto;
  transform:translateX(101%);transition:transform .3s var(--yd-ease);
}
.yd-drawer.is-open{transform:none}
.yd-drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.yd-drawer-close{
  width:40px;height:40px;border-radius:var(--yd-r-btn);background:transparent;
  border:1px solid var(--yd-line-d);color:var(--yd-t1-d);font-size:20px;line-height:1;cursor:pointer;
}
.yd-drawer-close:hover{border-color:var(--yd-neon);color:var(--yd-neon)}
.yd-drawer-nav a{
  display:flex;align-items:center;min-height:52px;padding:0 12px 0 14px;
  border-left:3px solid transparent;color:rgba(237,239,243,.78);font-size:15.5px;
  border-radius:0 var(--yd-r-btn) var(--yd-r-btn) 0;
  transition:background .2s,color .2s,border-color .2s;
}
.yd-drawer-nav a:hover{background:rgba(255,255,255,.05);color:#fff}
.yd-drawer-nav a.is-active{
  color:var(--yd-neon);border-left-color:var(--yd-neon);background:rgba(198,242,78,.08);
}
.yd-drawer-cta{margin-top:24px}
.yd-drawer-cta .yd-btn{width:100%}

/* ============ 按钮 ============ */
.yd-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:var(--yd-r-btn);border:1px solid transparent;
  font-size:15px;font-weight:700;line-height:1;cursor:pointer;text-align:center;
  transition:transform .2s var(--yd-ease),box-shadow .2s var(--yd-ease),background .2s,border-color .2s,color .2s;
}
.yd-btn-primary{background:var(--yd-neon);color:#0B0D10}
.yd-btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 20px -6px var(--yd-neon)}
.yd-btn-primary:active{transform:translateY(0)}
.yd-btn-ghost{background:transparent;border-color:var(--yd-neon);color:var(--yd-neon)}
.yd-btn-ghost:hover{background:rgba(198,242,78,.12)}
.yd-btn-ghost:active{background:rgba(198,242,78,.2)}
.yd-btn-sm{padding:11px 18px;font-size:14px}
.yd-btn-dark{background:var(--yd-ink);color:#fff}
.yd-btn-dark:hover{transform:translateY(-1px);box-shadow:0 0 20px -6px rgba(11,13,16,.45)}
.yd-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;
  color:var(--yd-neon-deep);
  background:linear-gradient(currentColor,currentColor) no-repeat 0 100%/0 1px;
  transition:background-size .3s var(--yd-ease),color .2s;
}
.yd-link:hover{background-size:100% 1px}
.yd-link .arw{transition:transform .2s var(--yd-ease)}
.yd-link:hover .arw{transform:translateX(4px)}
.yd-link-dark{color:var(--yd-neon)}

/* ============ 页头窄条 ============ */
.yd-pagehero{
  position:relative;overflow:hidden;background:var(--yd-ink);
  padding:52px 0 56px;color:var(--yd-t1-d);
}
.yd-pagehero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  opacity:.5;
}
.yd-pagehero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(11,13,16,.96) 0%,rgba(11,13,16,.86) 46%,rgba(11,13,16,.62) 100%);
}
.yd-pagehero .yd-container{position:relative;z-index:2}
.yd-pagehero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.yd-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--yd-t2-d);margin-bottom:18px}
.yd-crumb a{color:var(--yd-t2-d);transition:color .2s}
.yd-crumb a:hover{color:var(--yd-neon)}
.yd-crumb span.sep{color:rgba(237,239,243,.3)}
.yd-crumb strong{color:var(--yd-neon);font-weight:500}
.yd-pagehero h1{color:#fff}
.yd-pagehero h1 em{font-style:normal;color:var(--yd-neon)}
.yd-pagehero-sub{margin-top:18px;font-size:16px;color:rgba(237,239,243,.76);max-width:600px}
.yd-pagehero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.yd-pagehero-media{
  border-radius:var(--yd-r-card);overflow:hidden;border:1px solid var(--yd-line-d);
  aspect-ratio:4/3;background:var(--yd-ink-2);
}
.yd-pagehero-media img{width:100%;height:100%;object-fit:cover}

/* 徽章 */
.yd-badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;
  font-size:13px;font-weight:500;letter-spacing:.02em;
  background:rgba(198,242,78,.14);color:var(--yd-neon-deep);
}
.yd-badge-flame{background:rgba(255,106,61,.14);color:var(--yd-flame-deep)}
.yd-badge-dark{background:rgba(198,242,78,.14);color:var(--yd-neon)}
.yd-badge-dark-flame{background:rgba(255,106,61,.16);color:#FFB49A}

/* ============ 主体布局 ============ */
.yd-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:40px;align-items:start}
.yd-side{position:sticky;top:96px}
.yd-side-title{
  font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--yd-t2);
  text-transform:uppercase;margin-bottom:14px;
}
.yd-side-list{border-left:1px solid var(--yd-line)}
.yd-side-list a{
  display:flex;align-items:center;min-height:46px;padding:0 12px 0 16px;
  font-size:15px;color:var(--yd-t2);border-left:3px solid transparent;margin-left:-1px;
  transition:color .2s,background .2s,border-color .2s,transform .2s;
}
.yd-side-list a:hover{color:var(--yd-t1);background:rgba(11,13,16,.03);transform:translateX(2px)}
.yd-side-list a.is-active{
  color:var(--yd-t1);font-weight:700;border-left-color:var(--yd-neon);background:rgba(198,242,78,.10);
}
.yd-side-note{
  margin-top:24px;padding:20px;border-radius:var(--yd-r-card);
  background:var(--yd-ink);color:var(--yd-t1-d);border:1px solid var(--yd-line-d);
}
.yd-side-note h4{font-size:15px;font-weight:700;margin-bottom:8px;color:#fff}
.yd-side-note p{font-size:14px;color:var(--yd-t2-d);line-height:1.75}
.yd-side-note .yd-link{margin-top:14px}

/* ============ 卡片流 ============ */
.yd-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.yd-grid-sep{grid-column:1/-1;height:1px;background:var(--yd-line);margin:8px 0}
.yd-card{
  display:flex;flex-direction:column;background:var(--yd-card);
  border:1px solid var(--yd-line);border-radius:var(--yd-r-card);overflow:hidden;
  box-shadow:var(--yd-shadow);
  transition:transform .25s var(--yd-ease),border-color .25s,box-shadow .25s;
}
.yd-card:hover{transform:translateY(-4px);border-color:var(--yd-neon);box-shadow:var(--yd-shadow-hover)}
.yd-card-media{aspect-ratio:4/3;overflow:hidden;background:var(--yd-ink-2);position:relative}
.yd-card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--yd-ease)}
.yd-card:hover .yd-card-media img{transform:scale(1.03)}
.yd-card-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto}
.yd-card-body h3{font-size:20px}
.yd-card-desc{
  font-size:15px;line-height:1.75;color:var(--yd-t2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.yd-card-meta{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--yd-line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.yd-card-meta time{font-size:13px;color:var(--yd-t2)}

/* ============ 指标带 ============ */
.yd-metrics{background:var(--yd-ink);color:var(--yd-t1-d)}
.yd-metrics .yd-section-head h2{color:#fff}
.yd-metrics .yd-section-head p{color:var(--yd-t2-d)}
.yd-metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.yd-metric{
  background:var(--yd-ink-2);border:1px solid var(--yd-line-d);border-radius:var(--yd-r-card);
  padding:26px 24px;
  transition:border-color .25s,transform .25s var(--yd-ease);
}
.yd-metric:hover{border-color:rgba(198,242,78,.5);transform:translateY(-4px)}
.yd-metric-num{
  font-size:34px;font-weight:800;line-height:1.1;color:var(--yd-neon);
  font-family:"JetBrains Mono","SFMono-Regular",Consolas,monospace;font-variant-numeric:tabular-nums;
}
.yd-metric-num small{font-size:15px;font-weight:600;margin-left:4px;color:var(--yd-t2-d)}
.yd-metric-label{margin-top:10px;font-size:15px;font-weight:700;color:#fff}
.yd-metric-cap{margin-top:6px;font-size:13px;color:var(--yd-t2-d);line-height:1.7}
.yd-bar{height:6px;border-radius:999px;background:rgba(255,255,255,.12);overflow:hidden;margin-top:16px}
.yd-bar i{display:block;height:100%;border-radius:999px;background:var(--yd-neon)}

/* ============ 流程 ============ */
.yd-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.yd-step{
  position:relative;background:#fff;border:1px solid var(--yd-line);border-radius:var(--yd-r-card);
  padding:28px 24px;box-shadow:var(--yd-shadow);
  transition:transform .25s var(--yd-ease),border-color .25s,box-shadow .25s;
}
.yd-step:hover{transform:translateY(-4px);border-color:var(--yd-neon);box-shadow:var(--yd-shadow-hover)}
.yd-step-num{
  font-size:26px;font-weight:800;color:var(--yd-neon-deep);opacity:.35;
  font-family:"JetBrains Mono","SFMono-Regular",Consolas,monospace;font-variant-numeric:tabular-nums;
}
.yd-step h3{margin-top:12px;font-size:18px}
.yd-step p{margin-top:10px;font-size:14.5px;color:var(--yd-t2);line-height:1.75}

/* ============ FAQ ============ */
.yd-faq{max-width:900px;border-top:1px solid var(--yd-line)}
.yd-faq-item{position:relative;padding-left:14px;border-bottom:1px solid var(--yd-line);transition:background .2s}
.yd-faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--yd-neon);
  opacity:0;transition:opacity .2s;border-radius:2px;
}
.yd-faq-item:hover{background:rgba(11,13,16,.02)}
.yd-faq-item.is-open{background:rgba(198,242,78,.06)}
.yd-faq-item.is-open::before{opacity:1}
.yd-faq-q{
  width:100%;min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:12px 0;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16.5px;font-weight:700;color:var(--yd-t1);line-height:1.6;
}
.yd-faq-q:hover{color:var(--yd-neon-deep)}
.yd-faq-icon{
  flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform .28s var(--yd-ease);
}
.yd-faq-icon::before,.yd-faq-icon::after{
  content:"";position:absolute;background:var(--yd-neon-deep);border-radius:2px;
}
.yd-faq-icon::before{left:0;top:10px;width:22px;height:2px}
.yd-faq-icon::after{left:10px;top:0;width:2px;height:22px;transition:transform .28s var(--yd-ease)}
.yd-faq-item.is-open .yd-faq-icon{transform:rotate(180deg)}
.yd-faq-item.is-open .yd-faq-icon::after{transform:scaleY(0)}
.yd-faq-a{display:none;padding:0 0 20px;max-width:820px;font-size:15.5px;color:var(--yd-t2);line-height:1.85}
.yd-faq-item.is-open .yd-faq-a{display:block;animation:ydFade .28s var(--yd-ease)}
@keyframes ydFade{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ============ CTA 条 ============ */
.yd-cta{
  background:var(--yd-ink);color:var(--yd-t1-d);border-radius:var(--yd-r-card);
  border:1px solid var(--yd-line-d);padding:34px 36px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.yd-cta h3{font-size:clamp(20px,2.2vw,26px);color:#fff}
.yd-cta p{margin-top:8px;font-size:15px;color:var(--yd-t2-d)}
.yd-cta-side{display:flex;gap:12px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.yd-footer{background:var(--yd-ink);color:var(--yd-t1-d);padding:72px 0 0;margin-top:0}
.yd-footer::before{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,transparent,rgba(198,242,78,.55),transparent);
  margin-bottom:56px;
}
.yd-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px}
.yd-footer-brand p{margin-top:16px;font-size:14.5px;color:var(--yd-t2-d);line-height:1.8;max-width:320px}
.yd-footer h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:18px}
.yd-footer ul li{margin-bottom:12px}
.yd-footer ul a{font-size:14.5px;color:var(--yd-t2-d);transition:color .2s}
.yd-footer ul a:hover{color:var(--yd-neon)}
.yd-footer-contact li{font-size:14.5px;color:var(--yd-t2-d)}
.yd-footer-bottom{
  margin-top:52px;padding:22px 0 30px;border-top:1px solid var(--yd-line-d);
  display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center;justify-content:space-between;
  font-size:13.5px;color:rgba(237,239,243,.5);
}

/* ============ 动效降级 ============ */
.yd-anim .yd-reveal{opacity:0;transform:translateY(12px)}
.yd-anim .yd-reveal.is-in{
  opacity:1;transform:none;
  transition:opacity .42s var(--yd-ease),transform .42s var(--yd-ease);
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .yd-anim .yd-reveal{opacity:1;transform:none}
  *{transition-duration:.001ms !important;animation-duration:.001ms !important}
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .yd-container{padding:0 28px}
  .yd-layout{gap:32px;grid-template-columns:230px minmax(0,1fr)}
}
@media (max-width:1023px){
  :root{--yd-section:72px}
  .yd-container{padding:0 24px}
  .yd-nav{display:none}
  .yd-burger{display:block}
  .yd-nav-right .yd-btn{display:none}
  .yd-pagehero-grid{grid-template-columns:1fr;gap:32px}
  .yd-layout{grid-template-columns:1fr}
  .yd-side{position:static}
  .yd-side-list{display:flex;flex-wrap:wrap;border-left:0;gap:8px}
  .yd-side-list a{
    border:1px solid var(--yd-line);border-radius:999px;padding:8px 16px;min-height:auto;
    margin-left:0;font-size:14px;background:#fff;
  }
  .yd-side-list a.is-active{border-color:var(--yd-neon);color:var(--yd-t1)}
  .yd-side-note{display:none}
  .yd-metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .yd-steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .yd-footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767px){
  :root{--yd-section:56px}
  .yd-container{padding:0 20px}
  .yd-pagehero{padding:40px 0 44px}
  .yd-cards{grid-template-columns:1fr}
  .yd-pagehero-media{aspect-ratio:16/9}
  .yd-metric-grid{grid-template-columns:1fr}
  .yd-steps{grid-template-columns:1fr}
  .yd-cta{padding:28px 22px;flex-direction:column;align-items:flex-start}
  .yd-cta-side{width:100%}
  .yd-cta-side .yd-btn{flex:1 1 auto}
  .yd-footer{padding-top:56px}
  .yd-footer-grid{grid-template-columns:1fr}
  .yd-footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:479px){
  .yd-container{padding:0 16px}
  .yd-card-body{padding:20px}
  .yd-metric{padding:22px 20px}
  .yd-step{padding:24px 20px}
  .yd-cta-side .yd-btn{width:100%}
}

/* roulang page: category2 */
:root{
  --yd-ink:#0B0D10;
  --yd-ink-2:#141821;
  --yd-neon:#C6F24E;
  --yd-flame:#FF6A3D;
  --yd-paper:#F7F8F6;
  --yd-card:#FFFFFF;
  --yd-line:rgba(11,13,16,.10);
  --yd-line-dark:rgba(255,255,255,.10);
  --yd-t1:#0F1216;
  --yd-t2:#5B6470;
  --yd-t1-dark:#EDEFF3;
  --yd-t2-dark:#9AA4B2;
  --yd-r-card:12px;
  --yd-r-btn:6px;
  --yd-r-input:8px;
  --yd-shadow-1:0 1px 2px rgba(11,13,16,.06);
  --yd-shadow-2:0 16px 36px -20px rgba(11,13,16,.30);
  --yd-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --yd-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --yd-gap:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding:0;
  background:var(--yd-paper);
  color:var(--yd-t1);
  font-family:var(--yd-sans);
  font-size:16.5px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--yd-sans);
  color:var(--yd-t1);
  margin:0;
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.01em;
}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
a{color:inherit;text-decoration:none;background:none}
a:hover,a:focus{color:inherit}
img{max-width:100%;display:block;border:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;font-size:inherit;border:0;background:none;cursor:pointer;color:inherit}
input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
:focus-visible{outline:2px solid var(--yd-neon);outline-offset:2px}

/* ---------- 容器 ---------- */
.yd-container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 32px;
}
.yd-section{padding:var(--yd-gap) 0}
.yd-section-tight{padding:64px 0}
.yd-dark{background:var(--yd-ink);color:var(--yd-t1-dark)}
.yd-dark h1,.yd-dark h2,.yd-dark h3,.yd-dark h4{color:var(--yd-t1-dark)}
.yd-dark p{color:var(--yd-t2-dark)}
.yd-mono{font-family:var(--yd-mono);font-variant-numeric:tabular-nums}

/* ---------- 头部导航 ---------- */
.yd-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(11,13,16,.94);
  backdrop-filter:saturate(140%) blur(10px);
  -webkit-backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.yd-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,rgba(198,242,78,0) 0%,rgba(198,242,78,.68) 50%,rgba(198,242,78,0) 100%);
}
.yd-nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:72px;
  transition:height .25s ease;
}
.yd-header.is-scrolled .yd-nav-wrap{height:60px}
.yd-logo{
  font-size:20px;
  font-weight:800;
  letter-spacing:-.02em;
  color:#fff;
  white-space:nowrap;
  display:inline-flex;
  align-items:center;
}
.yd-logo span{color:var(--yd-neon)}
.yd-nav{
  display:flex;
  align-items:center;
  gap:6px;
  flex:1 1 auto;
  justify-content:center;
}
.yd-nav a{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  font-size:15px;
  font-weight:500;
  color:#C9CFD8;
  border-radius:var(--yd-r-btn);
  transition:color .22s ease,background .22s ease;
}
.yd-nav a::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:4px;
  height:2px;
  border-radius:2px;
  background:var(--yd-neon);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .28s cubic-bezier(.22,.61,.36,1);
}
.yd-nav a:hover{color:#fff;background:rgba(255,255,255,.05)}
.yd-nav a:hover::after{transform:scaleX(1)}
.yd-nav a.is-active{
  color:var(--yd-neon);
  box-shadow:0 0 12px -2px var(--yd-neon);
}
.yd-nav a.is-active::after{transform:scaleX(1)}
.yd-nav-right{display:flex;align-items:center;gap:14px}

/* ---------- 按钮 ---------- */
.yd-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 26px;
  border-radius:var(--yd-r-btn);
  font-weight:700;
  font-size:15px;
  line-height:1;
  border:1px solid transparent;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.yd-btn-primary{background:var(--yd-neon);color:#0B0D10}
.yd-btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 20px -6px var(--yd-neon);color:#0B0D10}
.yd-btn-primary:active{transform:translateY(0);box-shadow:none}
.yd-btn-ghost{background:transparent;color:var(--yd-neon);border-color:var(--yd-neon)}
.yd-btn-ghost:hover{background:rgba(198,242,78,.12);color:var(--yd-neon)}
.yd-btn-ghost:active{background:rgba(198,242,78,.2)}
.yd-btn-sm{padding:11px 20px;font-size:14px}
.yd-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--yd-neon);
  border-bottom:1px solid rgba(198,242,78,.35);
  background-image:linear-gradient(var(--yd-neon),var(--yd-neon));
  background-repeat:no-repeat;
  background-size:0 1px;
  background-position:0 100%;
  transition:background-size .28s cubic-bezier(.22,.61,.36,1),color .2s ease;
}
.yd-link:hover{background-size:100% 1px;color:var(--yd-neon)}
.yd-link .yd-arrow{transition:transform .25s ease;display:inline-block}
.yd-link:hover .yd-arrow{transform:translateX(4px)}
.yd-link-dark{color:#4C6B00;border-bottom-color:rgba(76,107,0,.3);background-image:linear-gradient(#4C6B00,#4C6B00)}
.yd-link-dark:hover{color:#4C6B00}

.yd-burger{
  display:none;
  width:42px;height:42px;
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--yd-r-btn);
  position:relative;
}
.yd-burger i,.yd-burger i::before,.yd-burger i::after{
  position:absolute;
  left:50%;
  width:18px;height:2px;
  background:#EDEFF3;
  border-radius:2px;
  transform:translateX(-50%);
  transition:.22s ease;
}
.yd-burger i{top:20px}
.yd-burger i::before{content:"";top:-6px;left:0;transform:none}
.yd-burger i::after{content:"";top:6px;left:0;transform:none}
.yd-burger[aria-expanded="true"] i{background:transparent}
.yd-burger[aria-expanded="true"] i::before{transform:rotate(45deg);top:0}
.yd-burger[aria-expanded="true"] i::after{transform:rotate(-45deg);top:0}

/* ---------- 抽屉 ---------- */
.yd-drawer{
  position:fixed;
  inset:0;
  z-index:120;
  background:rgba(6,8,10,.6);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;
}
.yd-drawer.is-open{opacity:1;visibility:visible}
.yd-drawer-panel{
  position:absolute;
  top:0;right:0;
  width:300px;
  max-width:86vw;
  height:100%;
  background:var(--yd-ink);
  border-left:1px solid rgba(255,255,255,.08);
  padding:20px;
  transform:translateX(100%);
  transition:transform .3s cubic-bezier(.22,.61,.36,1);
  overflow-y:auto;
}
.yd-drawer.is-open .yd-drawer-panel{transform:translateX(0)}
.yd-drawer-head{
  display:flex;align-items:center;justify-content:space-between;
  padding-bottom:18px;margin-bottom:12px;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.yd-drawer-close{
  width:36px;height:36px;
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--yd-r-btn);
  color:#EDEFF3;
  font-size:20px;line-height:1;
}
.yd-drawer-nav a{
  display:block;
  line-height:52px;
  padding:0 14px;
  color:#C9CFD8;
  font-size:16px;
  font-weight:500;
  border-left:3px solid transparent;
  border-bottom:1px solid rgba(255,255,255,.05);
}
.yd-drawer-nav a.is-active{
  border-left-color:var(--yd-neon);
  color:var(--yd-neon);
  background:rgba(198,242,78,.06);
}
.yd-drawer-nav a:hover{background:rgba(255,255,255,.05);color:#fff}

/* ---------- 页头窄条 ---------- */
.yd-pagehead{
  position:relative;
  background:var(--yd-ink);
  color:var(--yd-t1-dark);
  overflow:hidden;
  padding:56px 0 0;
}
.yd-pagehead::before{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:56px 56px;
  pointer-events:none;
}
.yd-pagehead-grid{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1fr) 360px;
  gap:48px;
  align-items:center;
  min-height:280px;
  padding-bottom:44px;
}
.yd-pagehead h1{
  font-size:clamp(30px,3.4vw,44px);
  font-weight:800;
  line-height:1.18;
  letter-spacing:-.02em;
  color:#fff;
  margin:18px 0 16px;
  max-width:20em;
}
.yd-pagehead p{color:var(--yd-t2-dark);max-width:640px;font-size:16px}
.yd-crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;font-weight:500;letter-spacing:.02em;
  color:#8A93A0;
}
.yd-crumb a{color:#8A93A0;transition:color .2s ease}
.yd-crumb a:hover{color:var(--yd-neon)}
.yd-crumb .sep{color:#4A525E}
.yd-crumb .cur{color:#DDE2E9}
.yd-head-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.yd-pagehead-media{
  border-radius:var(--yd-r-card);
  overflow:hidden;
  border:1px solid rgba(255,255,255,.12);
  background:var(--yd-ink-2);
  aspect-ratio:4/3;
}
.yd-pagehead-media img{width:100%;height:100%;object-fit:cover;opacity:.92}

.yd-headline-strip{
  position:relative;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid rgba(255,255,255,.1);
}
.yd-headline-strip li{
  padding:24px 24px 28px 0;
  border-right:1px solid rgba(255,255,255,.08);
}
.yd-headline-strip li:last-child{border-right:0}
.yd-headline-strip .num{
  font-family:var(--yd-mono);
  font-variant-numeric:tabular-nums;
  font-size:26px;
  font-weight:700;
  color:var(--yd-neon);
  display:block;
  line-height:1.2;
}
.yd-headline-strip .cap{
  display:block;
  font-size:14px;
  color:#B7BFCB;
  margin-top:6px;
}
.yd-headline-strip .sub{
  display:block;
  font-size:13px;
  color:#7C8593;
  margin-top:4px;
}

/* ---------- 板块标题 ---------- */
.yd-sec-head{margin-bottom:40px;max-width:760px}
.yd-sec-head h2{
  font-size:clamp(26px,3vw,38px);
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.02em;
}
.yd-sec-head .yd-rule{
  display:block;
  width:32px;height:3px;
  background:var(--yd-neon);
  border-radius:2px;
  margin-top:16px;
}
.yd-sec-head p{margin-top:14px;color:var(--yd-t2);font-size:15px;max-width:68ch}

/* ---------- 编号条目流 ---------- */
.yd-flow{
  border-top:1px solid var(--yd-line);
}
.yd-row{
  display:grid;
  grid-template-columns:96px minmax(0,1fr) 210px;
  gap:28px;
  align-items:center;
  padding:30px 18px 30px 0;
  border-bottom:1px solid var(--yd-line);
  transition:background .25s ease,transform .25s ease;
}
.yd-row:hover{
  background:rgba(198,242,78,.06);
  transform:translateX(-2px);
}
.yd-row-num{
  font-family:var(--yd-mono);
  font-variant-numeric:tabular-nums;
  font-size:44px;
  font-weight:700;
  line-height:1;
  letter-spacing:-.03em;
  color:var(--yd-neon);
  opacity:.2;
  transition:opacity .25s ease;
}
.yd-flow .yd-row:nth-child(1) .yd-row-num{opacity:.2}
.yd-flow .yd-row:nth-child(2) .yd-row-num{opacity:.3}
.yd-flow .yd-row:nth-child(3) .yd-row-num{opacity:.4}
.yd-flow .yd-row:nth-child(4) .yd-row-num{opacity:.5}
.yd-flow .yd-row:nth-child(5) .yd-row-num{opacity:.62}
.yd-flow .yd-row:nth-child(6) .yd-row-num{opacity:.74}
.yd-flow .yd-row:nth-child(7) .yd-row-num{opacity:.86}
.yd-flow .yd-row:nth-child(8) .yd-row-num{opacity:.94}
.yd-flow .yd-row:nth-child(9) .yd-row-num{opacity:1}
.yd-row:hover .yd-row-num{opacity:1}
.yd-row-main h3{
  font-size:20px;
  line-height:1.4;
  font-weight:700;
  margin-bottom:8px;
}
.yd-row-main p{
  color:var(--yd-t2);
  font-size:15.5px;
  line-height:1.8;
  max-width:640px;
  margin:0;
}
.yd-row-side{
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:12px;
  text-align:right;
}
.yd-badge{
  display:inline-flex;
  align-items:center;
  padding:5px 12px;
  border-radius:999px;
  font-size:13px;
  font-weight:500;
  letter-spacing:.02em;
  background:rgba(198,242,78,.12);
  color:#4C6B00;
  white-space:nowrap;
}
.yd-badge-flame{
  background:rgba(255,106,61,.12);
  color:#C63F17;
}
.yd-row-meta{
  font-family:var(--yd-mono);
  font-variant-numeric:tabular-nums;
  font-size:13px;
  color:var(--yd-t2);
  letter-spacing:.02em;
}

/* ---------- 步骤 ---------- */
.yd-steps{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:32px;
}
.yd-steps li{
  border-top:3px solid var(--yd-neon);
  padding-top:22px;
}
.yd-steps .step-no{
  font-family:var(--yd-mono);
  font-variant-numeric:tabular-nums;
  font-size:13px;
  letter-spacing:.12em;
  color:var(--yd-t2);
  display:block;
  margin-bottom:10px;
}
.yd-steps h3{font-size:19px;margin-bottom:10px}
.yd-steps p{color:var(--yd-t2);font-size:15px;margin:0}

/* ---------- 轻量问答 ---------- */
.yd-acc{border-top:1px solid var(--yd-line);max-width:900px}
.yd-acc-item{border-bottom:1px solid var(--yd-line);transition:background .25s ease,box-shadow .25s ease}
.yd-acc-item.is-open{
  background:rgba(198,242,78,.05);
  box-shadow:inset 3px 0 0 var(--yd-neon);
}
.yd-acc-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:64px;
  padding:16px 20px;
  text-align:left;
  font-size:16.5px;
  font-weight:600;
  color:var(--yd-t1);
  transition:color .2s ease;
}
.yd-acc-q:hover{color:#3F5A00}
.yd-acc-icon{
  flex:0 0 auto;
  width:22px;height:22px;
  position:relative;
  transition:transform .3s ease;
}
.yd-acc-icon::before,.yd-acc-icon::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  background:var(--yd-t2);
  border-radius:2px;
  transform:translate(-50%,-50%);
  transition:background .2s ease,transform .3s ease;
}
.yd-acc-icon::before{width:14px;height:2px}
.yd-acc-icon::after{width:2px;height:14px}
.yd-acc-item.is-open .yd-acc-icon{transform:rotate(180deg)}
.yd-acc-item.is-open .yd-acc-icon::before{background:var(--yd-neon)}
.yd-acc-item.is-open .yd-acc-icon::after{background:var(--yd-neon);transform:translate(-50%,-50%) scaleY(0)}
.yd-acc-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .32s cubic-bezier(.22,.61,.36,1);
}
.yd-acc-a-inner{
  max-width:820px;
  padding:0 20px 22px;
  color:var(--yd-t2);
  font-size:15.5px;
  line-height:1.85;
}

/* ---------- 横向 CTA ---------- */
.yd-cta-bar{
  background:var(--yd-ink);
  border:1px solid var(--yd-line-dark);
  border-radius:var(--yd-r-card);
  padding:32px 36px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
}
.yd-cta-bar h3{
  color:#fff;
  font-size:22px;
  font-weight:700;
  margin-bottom:8px;
}
.yd-cta-bar p{color:var(--yd-t2-dark);font-size:15px;margin:0;max-width:56ch}

/* ---------- 页脚 ---------- */
.yd-footer{
  background:var(--yd-ink);
  color:#B7BFCB;
  padding:72px 0 0;
  margin-top:0;
  border-top:1px solid rgba(255,255,255,.07);
}
.yd-footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.yd-footer h4{
  color:#fff;
  font-size:15px;
  font-weight:700;
  letter-spacing:.04em;
  margin-bottom:18px;
}
.yd-footer .yd-logo{font-size:19px;margin-bottom:16px}
.yd-footer p{font-size:14.5px;color:#8E97A4;line-height:1.8;max-width:36ch}
.yd-footer ul li{margin-bottom:11px}
.yd-footer ul a{
  font-size:14.5px;
  color:#B7BFCB;
  transition:color .2s ease;
  background-image:linear-gradient(var(--yd-neon),var(--yd-neon));
  background-repeat:no-repeat;
  background-size:0 1px;
  background-position:0 100%;
  padding-bottom:2px;
}
.yd-footer ul a:hover{color:var(--yd-neon);background-size:100% 1px}
.yd-footer-contact li{font-size:14.5px;color:#8E97A4}
.yd-footer-bottom{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:22px 0 30px;
  font-size:13.5px;
  color:#7C8593;
}
.yd-footer-bottom::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,rgba(198,242,78,0) 0%,rgba(198,242,78,.55) 50%,rgba(198,242,78,0) 100%);
}
.yd-footer-bottom p{margin:0;font-size:13.5px;color:#7C8593;max-width:none}
.yd-domain{font-family:var(--yd-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}

/* ---------- 入场动效 ---------- */
.yd-reveal{opacity:1;transform:none}
.js-on .yd-reveal{opacity:0;transform:translateY(12px);transition:opacity .42s cubic-bezier(.22,.61,.36,1),transform .42s cubic-bezier(.22,.61,.36,1)}
.js-on .yd-reveal.is-in{opacity:1;transform:translateY(0)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .yd-container{padding:0 24px}
  .yd-nav a{padding:10px 11px;font-size:14.5px}
}
@media (max-width:1023px){
  :root{--yd-gap:72px}
  .yd-nav{display:none}
  .yd-burger{display:block}
  .yd-pagehead-grid{grid-template-columns:1fr;gap:32px;padding-bottom:36px}
  .yd-pagehead-media{aspect-ratio:16/9;max-width:560px}
  .yd-headline-strip{grid-template-columns:repeat(2,1fr)}
  .yd-headline-strip li{border-bottom:1px solid rgba(255,255,255,.08)}
  .yd-headline-strip li:nth-child(2n){border-right:0}
  .yd-row{grid-template-columns:72px minmax(0,1fr);gap:20px}
  .yd-row-side{grid-column:2;flex-direction:row;align-items:center;justify-content:flex-start;text-align:left}
  .yd-row-num{font-size:36px}
  .yd-footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .yd-steps{grid-template-columns:1fr;gap:24px}
}
@media (max-width:767px){
  :root{--yd-gap:48px}
  .yd-container{padding:0 20px}
  body{font-size:16px}
  .yd-pagehead h1{font-size:clamp(28px,7vw,36px)}
  .yd-headline-strip{grid-template-columns:1fr}
  .yd-headline-strip li{padding:20px 0;border-right:0}
  .yd-row{grid-template-columns:1fr;gap:14px;padding:24px 0}
  .yd-row-num{font-size:30px}
  .yd-row-side{grid-column:1}
  .yd-cta-bar{flex-direction:column;align-items:flex-start;padding:26px 22px}
  .yd-cta-bar .yd-btn{width:100%}
  .yd-sec-head{margin-bottom:28px}
  .yd-footer{padding-top:56px}
  .yd-footer-grid{grid-template-columns:1fr;gap:28px}
  .yd-footer-bottom{flex-direction:column;align-items:flex-start}
  .yd-acc-q{padding:14px 16px;font-size:16px}
  .yd-acc-a-inner{padding:0 16px 20px}
}
@media (max-width:519px){
  .yd-container{padding:0 18px}
  .yd-pagehead{padding-top:40px}
  .yd-head-actions .yd-btn{width:100%}
  .yd-btn{padding:13px 20px}
  .yd-nav-wrap{gap:12px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important}
  .js-on .yd-reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --yd-ink:#0B0D10;
  --yd-ink-2:#141821;
  --yd-neon:#C6F24E;
  --yd-neon-deep:#3F6B10;
  --yd-flame:#FF6A3D;
  --yd-paper:#F7F8F6;
  --yd-card:#FFFFFF;
  --yd-line:rgba(11,13,16,.10);
  --yd-line-d:rgba(255,255,255,.10);
  --yd-t1:#0F1216;
  --yd-t2:#5B6470;
  --yd-t1d:#EDEFF3;
  --yd-t2d:#98A2B0;
  --yd-radius-card:12px;
  --yd-radius-btn:6px;
  --yd-radius-input:8px;
  --yd-shadow-1:0 1px 2px rgba(11,13,16,.06);
  --yd-shadow-2:0 16px 36px -20px rgba(11,13,16,.30);
  --yd-wrap:1240px;
  --yd-gap:24px;
  --yd-section:96px;
  --yd-mono:ui-monospace,SFMono-Regular,"JetBrains Mono","Roboto Mono",Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--yd-t1);
  background:var(--yd-paper);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-0.01em;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease;}
button{font:inherit;color:inherit;}
table{border-collapse:collapse;}
:focus-visible{outline:2px solid var(--yd-neon);outline-offset:2px;}
.yd-mono{font-family:var(--yd-mono);font-variant-numeric:tabular-nums;}
.yd-container{width:100%;max-width:var(--yd-wrap);margin:0 auto;padding:0 32px;}
.yd-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ---------- header ---------- */
.yd-header{position:sticky;top:0;z-index:60;background:var(--yd-ink);transition:box-shadow .25s ease;}
.yd-header::after{content:"";display:block;height:1px;background:linear-gradient(90deg,rgba(198,242,78,0) 0%,rgba(198,242,78,.7) 50%,rgba(198,242,78,0) 100%);}
.yd-header.is-scrolled{box-shadow:0 12px 30px -22px rgba(0,0,0,.9);backdrop-filter:blur(6px);}
.yd-nav-wrap{display:flex;align-items:center;gap:26px;height:72px;transition:height .25s ease;}
.yd-header.is-scrolled .yd-nav-wrap{height:60px;}
.yd-logo{font-size:20px;font-weight:800;letter-spacing:-0.02em;color:#FFFFFF;white-space:nowrap;}
.yd-logo span{color:var(--yd-neon);}
.yd-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.yd-nav a{position:relative;display:block;padding:10px 14px;font-size:15px;font-weight:500;color:#C6CDD7;border-radius:6px;}
.yd-nav a:hover{color:#FFFFFF;background:rgba(255,255,255,.06);}
.yd-nav a.is-active{color:var(--yd-neon);text-shadow:0 0 12px rgba(198,242,78,.45);}
.yd-nav a.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--yd-neon);box-shadow:0 0 12px -2px var(--yd-neon);}
.yd-nav-right{display:flex;align-items:center;gap:12px;margin-left:8px;}
.yd-burger{display:none;position:relative;width:42px;height:42px;border:1px solid var(--yd-line-d);border-radius:6px;background:transparent;cursor:pointer;transition:border-color .2s ease,background-color .2s ease;}
.yd-burger:hover{border-color:rgba(198,242,78,.55);background:rgba(255,255,255,.05);}
.yd-burger i,.yd-burger i::before,.yd-burger i::after{content:"";position:absolute;left:50%;width:18px;height:2px;background:#E7EAF0;transform:translateX(-50%);transition:transform .2s ease;}
.yd-burger i{top:50%;margin-top:-1px;}
.yd-burger i::before{top:-6px;}
.yd-burger i::after{top:6px;}

/* ---------- drawer ---------- */
.yd-drawer{position:fixed;inset:0;z-index:90;background:rgba(11,13,16,.62);opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;}
.yd-drawer.is-open{opacity:1;visibility:visible;}
.yd-drawer-panel{position:absolute;top:0;right:0;width:min(320px,86vw);height:100%;background:var(--yd-ink);padding:22px 20px 40px;overflow-y:auto;transform:translateX(100%);transition:transform .3s cubic-bezier(.22,.61,.36,1);}
.yd-drawer.is-open .yd-drawer-panel{transform:translateX(0);}
.yd-drawer-top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px;}
.yd-drawer-close{width:38px;height:38px;line-height:1;font-size:22px;border:1px solid var(--yd-line-d);border-radius:6px;background:transparent;color:#E7EAF0;cursor:pointer;transition:border-color .2s ease,color .2s ease;}
.yd-drawer-close:hover{border-color:rgba(198,242,78,.55);color:var(--yd-neon);}
.yd-drawer-nav a{display:block;line-height:52px;padding:0 14px;font-size:15.5px;font-weight:500;color:#C6CDD7;border-left:3px solid transparent;}
.yd-drawer-nav a:hover{color:#FFFFFF;background:rgba(255,255,255,.05);}
.yd-drawer-nav a.is-active{color:var(--yd-neon);border-left-color:var(--yd-neon);background:rgba(198,242,78,.07);}
.yd-drawer-cta{margin-top:22px;width:100%;}

/* ---------- buttons ---------- */
.yd-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:var(--yd-radius-btn);padding:14px 26px;font-size:15px;font-weight:700;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;}
.yd-btn-sm{padding:10px 20px;font-size:14px;}
.yd-btn-primary{background:var(--yd-neon);color:#0B0D10;}
.yd-btn-primary:hover{transform:translateY(-1px);background:#D4F96C;box-shadow:0 0 20px -6px var(--yd-neon);}
.yd-btn-primary:active{transform:translateY(0);}
.yd-btn-ghost{background:transparent;border-color:rgba(198,242,78,.55);color:var(--yd-neon);}
.yd-btn-ghost:hover{background:rgba(198,242,78,.12);}
.yd-btn-dark{background:var(--yd-ink);color:#FFFFFF;}
.yd-btn-dark:hover{transform:translateY(-1px);background:#1B202A;box-shadow:0 0 20px -8px rgba(198,242,78,.6);}

/* ---------- badges ---------- */
.yd-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:.02em;background:rgba(198,242,78,.20);color:#2F4C0B;}
.yd-badge-flame{background:rgba(255,106,61,.14);color:#B23E16;}
.yd-badge-dark{background:rgba(198,242,78,.12);color:var(--yd-neon);}

/* ---------- hero ---------- */
.yd-hero{position:relative;background:var(--yd-ink) url("/assets/images/backpic/back-2.png") center/cover no-repeat;color:var(--yd-t1d);overflow:hidden;}
.yd-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(11,13,16,.95) 0%,rgba(11,13,16,.88) 46%,rgba(11,13,16,.74) 100%);}
.yd-hero-inner{position:relative;display:grid;grid-template-columns:1.35fr .95fr;gap:48px;align-items:center;padding:60px 0;min-height:290px;}
.yd-hero h1{font-size:clamp(32px,4vw,50px);font-weight:800;line-height:1.16;letter-spacing:-0.02em;color:#FFFFFF;margin:16px 0 18px;}
.yd-hero-lead{color:#C3CAD4;font-size:16.5px;max-width:56ch;margin:0;}
.yd-hero-media{border:1px solid var(--yd-line-d);border-radius:var(--yd-radius-card);overflow:hidden;background:var(--yd-ink-2);}
.yd-hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.yd-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;letter-spacing:.02em;color:var(--yd-t2d);}
.yd-crumb a{color:#C6CDD7;}
.yd-crumb a:hover{color:var(--yd-neon);}
.yd-crumb .sep{opacity:.5;}

/* ---------- sections ---------- */
.yd-section{padding:var(--yd-section) 0;}
.yd-section-paper{background:var(--yd-paper);}
.yd-section-ink{background:var(--yd-ink);color:var(--yd-t1d);}
.yd-section-ink h2,{color:#FFFFFF;}
.yd-section-head{max-width:760px;margin-bottom:44px;}
.yd-section-head h2{font-size:clamp(26px,3vw,38px);color:var(--yd-t1);}
.yd-section-ink .yd-section-head h2{color:#FFFFFF;}
.yd-section-head h2::after{content:"";display:block;width:32px;height:3px;margin-top:16px;border-radius:2px;background:var(--yd-neon);}
.yd-section-head p{margin:16px 0 0;color:var(--yd-t2);font-size:15.5px;max-width:68ch;}
.yd-section-ink .yd-section-head p{color:var(--yd-t2d);}
.yd-divider{height:1px;background:var(--yd-line);margin:0;}

/* ---------- compare table ---------- */
.yd-compare{border:1px solid var(--yd-line);border-radius:var(--yd-radius-card);background:var(--yd-card);box-shadow:var(--yd-shadow-1);overflow:hidden;}
.yd-compare-head,.yd-compare-row{display:grid;grid-template-columns:1.05fr 1fr 1.15fr 1.5fr;}
.yd-compare-head{background:#F1F3EF;border-bottom:1px solid var(--yd-line);}
.yd-compare-head span{padding:16px 18px;font-size:13px;font-weight:700;letter-spacing:.02em;color:var(--yd-t2);}
.yd-compare-head span.is-best{color:#2F4C0B;background:rgba(198,242,78,.20);}
.yd-compare-row{border-top:1px solid var(--yd-line);transition:background-color .2s ease;}
.yd-compare-row:first-of-type{border-top:0;}
.yd-compare-row:hover{background:rgba(11,13,16,.02);}
.yd-compare-row > span{padding:18px;font-size:15px;color:var(--yd-t1);display:flex;align-items:center;}
.yd-compare-name{font-weight:700;}
.yd-compare-mid{color:var(--yd-t2);}
.yd-compare-best{background:rgba(198,242,78,.18);color:#2C460A;font-weight:700;}
.yd-compare-note{color:var(--yd-t2);font-size:14.5px;}
.yd-compare-foot{margin-top:16px;font-size:13.5px;color:var(--yd-t2);}

/* ---------- steps ---------- */
.yd-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--yd-gap);}
.yd-step{background:var(--yd-ink-2);border:1px solid var(--yd-line-d);border-radius:var(--yd-radius-card);padding:26px 24px;transition:transform .22s ease,border-color .22s ease;}
.yd-step:hover{transform:translateY(-4px);border-color:rgba(198,242,78,.5);}
.yd-step-no{font-family:var(--yd-mono);font-variant-numeric:tabular-nums;font-size:13px;letter-spacing:.12em;color:var(--yd-neon);}
.yd-step h3{margin:14px 0 10px;font-size:19px;color:#FFFFFF;}
.yd-step p{margin:0;font-size:14.5px;color:var(--yd-t2d);}

/* ---------- faq ---------- */
.yd-faq{border-top:1px solid var(--yd-line);}
.yd-faq-item{border-bottom:1px solid var(--yd-line);}
.yd-faq-q{display:flex;align-items:center;justify-content:space-between;gap:18px;width:100%;min-height:64px;padding:14px 8px 14px 16px;background:transparent;border:0;border-left:3px solid transparent;text-align:left;font-size:17px;font-weight:600;color:var(--yd-t1);cursor:pointer;transition:background-color .2s ease,color .2s ease,border-color .2s ease;}
.yd-faq-q:hover{background:rgba(198,242,78,.07);color:#2C460A;}
.yd-faq-item.is-open .yd-faq-q{border-left-color:var(--yd-neon);background:rgba(198,242,78,.07);}
.yd-faq-icon{position:relative;flex:0 0 auto;width:16px;height:16px;}
.yd-faq-icon::before,.yd-faq-icon::after{content:"";position:absolute;background:var(--yd-t2);transition:transform .25s ease,background-color .2s ease;}
.yd-faq-icon::before{left:0;top:7px;width:16px;height:2px;}
.yd-faq-icon::after{left:7px;top:0;width:2px;height:16px;}
.yd-faq-item.is-open .yd-faq-icon::after{transform:scaleY(0);}
.yd-faq-item.is-open .yd-faq-icon::before{background:var(--yd-neon-deep);}
.yd-faq-a{max-height:0;overflow:hidden;transition:max-height .34s cubic-bezier(.22,.61,.36,1);}
.yd-faq-a-inner{max-width:820px;padding:0 16px 24px;font-size:15.5px;line-height:1.85;color:var(--yd-t2);}
.yd-faq-a-inner strong{color:var(--yd-t1);}

/* ---------- cta ---------- */
.yd-cta{display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;background:var(--yd-ink-2);border:1px solid rgba(198,242,78,.34);border-radius:var(--yd-radius-card);padding:32px 36px;color:var(--yd-t1d);}
.yd-cta h2{font-size:clamp(20px,2.2vw,26px);color:#FFFFFF;}
.yd-cta h2::after{display:none;}
.yd-cta p{margin:10px 0 0;font-size:15px;color:var(--yd-t2d);max-width:62ch;}

/* ---------- footer ---------- */
.yd-footer{position:relative;background:var(--yd-ink);color:#B7BFC9;padding:64px 0 0;}
.yd-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,rgba(198,242,78,0),rgba(198,242,78,.65),rgba(198,242,78,0));}
.yd-footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:48px;}
.yd-footer h4{font-size:14px;font-weight:700;letter-spacing:.02em;color:#FFFFFF;margin-bottom:16px;}
.yd-footer ul li{margin-bottom:10px;font-size:14px;}
.yd-footer a{color:#B7BFC9;}
.yd-footer a:hover{color:var(--yd-neon);}
.yd-footer-brand p{margin:14px 0 0;font-size:14px;color:#8C95A2;max-width:34ch;}
.yd-footer-contact li{color:#B7BFC9;}
.yd-footer-bottom{display:flex;flex-wrap:wrap;gap:10px 28px;justify-content:space-between;align-items:center;border-top:1px solid var(--yd-line-d);padding:20px 0 28px;font-size:13px;color:#7C8592;}
.yd-domain{font-family:var(--yd-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* ---------- motion ---------- */
.js .yd-reveal{opacity:0;transform:translateY(12px);transition:opacity .42s cubic-bezier(.22,.61,.36,1),transform .42s cubic-bezier(.22,.61,.36,1);}
.js .yd-reveal.is-in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .yd-container{padding:0 24px;}
  .yd-nav a{padding:10px 11px;font-size:14.5px;}
  .yd-hero-inner{gap:32px;}
  .yd-steps{grid-template-columns:repeat(2,1fr);}
  .yd-footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media (max-width:1023px){
  :root{--yd-section:72px;}
  .yd-compare-head,.yd-compare-row{grid-template-columns:1fr 1fr 1.2fr;}
  .yd-compare-head span:nth-child(4),.yd-compare-row .yd-compare-note{display:none;}
}
@media (max-width:900px){
  .yd-nav,.yd-nav-right .yd-btn{display:none;}
  .yd-burger{display:block;}
  .yd-nav-right{margin-left:auto;}
  .yd-hero-inner{grid-template-columns:1fr;gap:28px;padding:44px 0 52px;}
  .yd-hero-media{order:2;}
  .yd-footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  :root{--yd-section:56px;}
  .yd-container{padding:0 20px;}
  .yd-compare{border-radius:var(--yd-radius-card);}
  .yd-compare-head{display:none;}
  .yd-compare-row{grid-template-columns:1fr;padding:16px 18px;gap:10px;}
  .yd-compare-row > span{padding:0;font-size:15px;}
  .yd-compare-row > span[data-label]{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;}
  .yd-compare-row > span[data-label]::before{content:attr(data-label);flex:0 0 auto;font-size:13px;font-weight:700;color:var(--yd-t2);}
  .yd-compare-name{font-size:17px;}
  .yd-compare-best{background:transparent;color:#2C460A;padding-left:0;}
  .yd-steps{grid-template-columns:1fr;}
  .yd-cta{padding:24px 20px;}
  .yd-cta .yd-btn{width:100%;}
}
@media (max-width:520px){
  .yd-nav-wrap{height:64px;}
  .yd-header.is-scrolled .yd-nav-wrap{height:58px;}
  .yd-hero h1{font-size:clamp(26px,7vw,34px);}
  .yd-footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px;}
  .yd-faq-q{font-size:16px;padding-left:12px;}
  .yd-btn{padding:13px 22px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important;}
  .js .yd-reveal{opacity:1;transform:none;}
}