/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --ink:#0D0F0E;
  --ink-2:#141715;
  --surface:#191D1B;
  --surface-2:#1F2421;
  --line:#262B28;
  --line-strong:#343A36;
  --fg:#F1F4F0;
  --fg-2:#A7B0A9;
  --fg-3:#6E7772;
  --brand:#C8F14E;
  --brand-ink:#0D0F0E;
  --brand-soft:rgba(200,241,78,.12);
  --brand-line:rgba(200,241,78,.32);
  --accent:#FF7A45;
  --ok:#5FD08A;
  --warn:#F0B84E;
  --err:#F0705F;
  --r-btn:6px;
  --r-card:16px;
  --r-img:12px;
  --r-badge:4px;
  --shadow:0 12px 32px rgba(0,0,0,.35);
  --shadow-soft:inset 0 1px 0 rgba(255,255,255,.03);
  --container:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;
}

/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--fg);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease),transform .22s var(--ease)}
a:hover{color:var(--brand)}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.2}
p{margin:0}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand);color:var(--brand-ink)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.01em}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ============ 通用文字 ============ */
.eyebrow{
  display:inline-block;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--brand);
  margin-bottom:14px;
}
.h2{font-size:clamp(26px,3.4vw,42px);font-weight:800;letter-spacing:-.02em;line-height:1.22}
.h3{font-size:clamp(19px,2.1vw,25px);font-weight:800;line-height:1.3}
.lead{color:var(--fg-2);font-size:16.5px;line-height:1.9;max-width:64ch}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  white-space:nowrap;
  border:1px solid transparent;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.btn-primary{background:var(--brand);color:var(--brand-ink);box-shadow:0 0 0 0 rgba(200,241,78,0)}
.btn-primary:hover{background:#D6F86B;color:var(--brand-ink);box-shadow:0 0 0 1px var(--brand);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);background:#B7E03F}
.btn-outline{background:transparent;color:var(--fg);border-color:var(--line-strong)}
.btn-outline:hover{color:var(--brand);border-color:var(--brand-line);transform:translateY(-1px)}
.btn-outline:active{transform:translateY(0);color:var(--brand)}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;pointer-events:none;transform:none}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:200;
  background:rgba(13,15,14,.94);
  border-bottom:1px solid transparent;
  transition:background-color .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow)}
.brand-bar{border-bottom:1px solid var(--line)}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:76px;transition:height .3s var(--ease)}
.site-header.is-scrolled .brand-inner{height:62px}
.logo{display:inline-flex;align-items:center;gap:11px;white-space:nowrap;flex:0 0 auto}
.logo-mark{
  width:38px;height:38px;flex:0 0 auto;
  border-radius:10px;
  background:var(--brand);color:var(--brand-ink);
  display:grid;place-items:center;
  font-family:var(--mono);font-weight:800;font-size:19px;line-height:1;
  box-shadow:var(--shadow-soft);
}
.logo-text{font-size:17.5px;font-weight:800;letter-spacing:-.02em;color:var(--fg);line-height:1.2}
.logo:hover .logo-text{color:var(--brand)}
.brand-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.icon-btn{
  width:42px;height:42px;border-radius:var(--r-btn);
  border:1px solid var(--line);display:grid;place-items:center;
  color:var(--fg-2);transition:color .22s var(--ease),border-color .22s var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand-line)}
.menu-toggle{display:none;width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);place-items:center;color:var(--fg-2)}
.menu-toggle:hover{color:var(--brand);border-color:var(--brand-line)}
.menu-toggle span{display:block;width:18px;height:2px;background:currentColor;box-shadow:0 -6px 0 currentColor,0 6px 0 currentColor}
.channel-bar{overflow:hidden}
.channel-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:56px}
.channels{display:flex;align-items:center;gap:34px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;height:100%}
.channels::-webkit-scrollbar{display:none}
.channel{
  position:relative;display:inline-flex;align-items:center;height:56px;
  font-size:15px;color:var(--fg-2);white-space:nowrap;
  transition:color .22s var(--ease);
}
.channel::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .26s var(--ease);
}
.channel:hover{color:var(--fg)}
.channel:hover::after{transform:scaleX(1)}
.channel.is-active{color:var(--fg);font-weight:700}
.channel.is-active::after{transform:scaleX(1)}
.channel-note{font-family:var(--mono);font-size:12px;color:var(--fg-3);white-space:nowrap}

/* ============ 移动端抽屉 ============ */
.drawer{
  position:fixed;inset:0;z-index:400;
  background:var(--ink);
  transform:translateX(100%);
  transition:transform .34s var(--ease);
  display:flex;flex-direction:column;
  padding:22px 22px 36px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.drawer-close{width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);display:grid;place-items:center;font-size:20px;line-height:1;color:var(--fg-2)}
.drawer-close:hover{color:var(--brand);border-color:var(--brand-line)}
.drawer-nav{display:grid;gap:2px;margin-top:18px}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:56px;padding:0 4px;font-size:17px;font-weight:600;
  border-bottom:1px solid var(--line);color:var(--fg-2);
}
.drawer-nav a.is-active,.drawer-nav a:hover{color:var(--brand)}
.drawer-nav a span{font-family:var(--mono);font-size:12px;color:var(--fg-3)}
.drawer-cta{margin-top:28px;display:grid;gap:12px}
.drawer-cta .btn{width:100%}

/* ============ Hero ============ */
.hero{position:relative;isolation:isolate;overflow:hidden;padding-top:76px}
.hero-media{position:absolute;inset:0;z-index:-3}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.5}
.hero-scrim{
  position:absolute;inset:0;z-index:-2;
  background:linear-gradient(180deg,rgba(13,15,14,.70) 0%,rgba(13,15,14,.90) 58%,var(--ink) 100%);
}
.hero-lines{
  position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:repeating-linear-gradient(to bottom,rgba(255,255,255,.05) 0 1px,transparent 1px 7px);
  opacity:.6;
}
.hero-inner{
  display:grid;grid-template-columns:minmax(0,1.6fr) minmax(270px,.75fr);
  gap:52px;align-items:center;padding-top:32px;padding-bottom:72px;
}
.hero h1{
  font-size:clamp(38px,5.4vw,68px);
  font-weight:900;
  line-height:1.14;
  letter-spacing:-.025em;
  max-width:16ch;
}
.hero-sub{margin-top:20px;font-size:17px;color:var(--fg-2);max-width:36ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-panel{
  background:rgba(25,29,27,.78);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px;
  box-shadow:var(--shadow);
}
.panel-head{display:flex;align-items:center;gap:9px;font-family:var(--mono);font-size:13px;color:var(--fg-2);letter-spacing:.06em;padding-bottom:14px;border-bottom:1px solid var(--line)}
.panel-head .dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 4px rgba(95,208,138,.14)}
.panel-list{display:grid;gap:2px;margin-top:6px}
.panel-list li{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px dashed rgba(38,43,40,.9);font-size:14px;color:var(--fg-2)}
.panel-list li:last-child{border-bottom:0}
.panel-list b{color:var(--ok);font-family:var(--mono);font-weight:600}
.hero-bar{
  display:flex;flex-wrap:wrap;gap:10px 34px;
  padding:16px 0 22px;
  border-top:1px solid var(--line);
  font-size:12.5px;color:var(--fg-3);letter-spacing:.04em;
}

/* ============ 数据条 ============ */
.stat-strip{background:var(--ink-2);border-bottom:1px solid var(--line)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:34px 26px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat b{
  display:block;font-family:var(--mono);
  font-size:clamp(26px,3.2vw,38px);font-weight:700;line-height:1.1;
  color:var(--brand);letter-spacing:-.02em;
}
.stat span{display:block;margin-top:10px;font-size:13px;color:var(--fg-3);letter-spacing:.03em}

/* ============ 板块通用 ============ */
.section{padding:96px 0}
.section-alt{background:var(--ink-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:32px;
  margin-bottom:52px;
}
.section-head .lead{margin-top:16px}
.link-more{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:700;color:var(--fg-2);white-space:nowrap;
  padding-bottom:4px;border-bottom:1px solid var(--line-strong);
}
.link-more:hover{color:var(--brand);border-bottom-color:var(--brand)}
.link-more span{transition:transform .22s var(--ease)}
.link-more:hover span{transform:translateX(4px)}

/* ============ 时间线 ============ */
.flow{position:relative}
.flow-item{display:grid;grid-template-columns:96px 42px minmax(0,1fr);padding-bottom:38px}
.flow-item:last-child{padding-bottom:0}
.flow-time{font-family:var(--mono);font-size:14px;color:var(--accent);letter-spacing:.06em;padding-top:1px}
.flow-rail{position:relative;display:flex;justify-content:center}
.flow-rail::before{content:"";position:absolute;top:10px;bottom:-38px;width:1px;background:var(--line)}
.flow-item:last-child .flow-rail::before{display:none}
.flow-dot{
  position:relative;z-index:1;margin-top:6px;
  width:11px;height:11px;border-radius:50%;
  background:var(--ink);border:2px solid var(--brand);
}
.flow-item.is-current .flow-dot{background:var(--accent);border-color:var(--accent);animation:pulse 2.4s var(--ease) infinite}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(255,122,69,.45)}
  70%{box-shadow:0 0 0 9px rgba(255,122,69,0)}
  100%{box-shadow:0 0 0 0 rgba(255,122,69,0)}
}
.flow-body h3{font-size:19px;font-weight:800;line-height:1.35}
.flow-body .flow-meta{
  display:flex;flex-wrap:wrap;gap:8px 18px;
  margin-top:10px;font-family:var(--mono);font-size:12.5px;color:var(--fg-3);
}
.flow-body p{margin-top:10px;color:var(--fg-2);font-size:15.5px;max-width:62ch}

/* ============ 亮点错落网格 ============ */
.feature-grid{display:grid;grid-template-columns:1.45fr 1fr;gap:24px}
.feature-card{
  position:relative;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.feature-card:hover{border-color:var(--brand-line);transform:translateY(-2px);box-shadow:var(--shadow)}
.feature-card img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.feature-card:hover img{transform:scale(1.03)}
.feature-main{grid-row:span 2;display:flex;flex-direction:column}
.feature-main .feature-media{aspect-ratio:16/10;overflow:hidden}
.feature-side{display:flex;gap:20px;padding:20px;align-items:center}
.feature-side .feature-media{width:104px;height:104px;flex:0 0 auto;border-radius:var(--r-img);overflow:hidden}
.feature-info{padding:26px;min-width:0}
.feature-main .feature-info{padding:28px 26px 30px}
.feature-info h3{font-size:20px;font-weight:800;line-height:1.35;transition:color .22s var(--ease)}
.feature-card:hover .feature-info h3{color:var(--fg)}
.feature-info p{margin-top:10px;color:var(--fg-2);font-size:15px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.badge{
  display:inline-flex;align-items:center;
  padding:3px 9px;border-radius:var(--r-badge);
  background:var(--brand-soft);color:var(--brand);
  border:1px solid var(--brand-line);
  font-size:12px;font-weight:700;letter-spacing:.04em;line-height:1.7;
}
.badge-warn{background:rgba(240,184,78,.12);color:var(--warn);border-color:rgba(240,184,78,.3)}
.badge-plain{background:var(--surface-2);color:var(--fg-2);border-color:var(--line)}

/* ============ 对比表 ============ */
.compare-wrap{overflow-x:auto;margin:0 -24px;padding:0 24px 10px;scrollbar-width:thin}
.compare{width:100%;min-width:760px;border-spacing:0}
.compare th,.compare td{padding:18px 20px;text-align:left;border-bottom:1px solid var(--line);vertical-align:middle}
.compare thead th{
  font-family:var(--mono);font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--fg-2);text-transform:uppercase;
  background:var(--surface);border-bottom:1px solid var(--line-strong);
}
.compare thead th:first-child{border-radius:var(--r-card) 0 0 0;color:var(--fg-3)}
.compare thead th:last-child{border-radius:0 var(--r-card) 0 0}
.compare tbody th{
  font-size:14px;font-weight:600;color:var(--fg-2);
  background:var(--ink-2);white-space:nowrap;
}
.compare td{font-size:15px;color:var(--fg)}
.compare td .mono{color:var(--fg-2);font-size:14px}
.compare .is-featured{
  background:rgba(200,241,78,.06);
  border-left:1px solid var(--brand-line);
  border-right:1px solid var(--brand-line);
  position:relative;
}
.compare thead .is-featured{color:var(--brand);border-top:2px solid var(--brand)}
.compare thead .is-featured::after{
  content:"推荐";position:absolute;top:-11px;right:16px;
  background:var(--accent);color:#21100A;
  font-family:var(--font);font-size:11px;font-weight:800;letter-spacing:.08em;
  padding:2px 8px;border-radius:999px;
}
.compare .is-featured strong{color:var(--brand);font-weight:800}
.compare tfoot td{border-bottom:0;padding-top:26px}

/* ============ 资讯卡片 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{border-color:var(--brand-line);transform:translateY(-2px);box-shadow:var(--shadow)}
.card-media{display:block;aspect-ratio:16/10;overflow:hidden;background:var(--ink-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1 1 auto;min-width:0}
.card-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.card-meta time{font-family:var(--mono);font-size:12.5px;color:var(--fg-3)}
.card-title{
  font-size:18px;font-weight:800;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-title a:hover{color:var(--brand)}
.card-excerpt{
  margin-top:12px;color:var(--fg-2);font-size:14.5px;line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-link{
  margin-top:auto;padding-top:18px;
  display:inline-flex;align-items:center;gap:6px;
  font-size:13.5px;font-weight:700;color:var(--fg-2);
}
.card-link span{transition:transform .22s var(--ease)}
.card:hover .card-link{color:var(--brand)}
.card:hover .card-link span{transform:translateX(4px)}
.empty-state{
  grid-column:1/-1;
  border:1px dashed var(--line-strong);
  border-radius:var(--r-card);
  padding:56px 24px;text-align:center;
  color:var(--fg-3);
}
.empty-state p{font-size:15px;margin-bottom:18px;font-family:var(--mono);letter-spacing:.04em}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:20px;
  padding:24px 4px;text-align:left;
  font-size:17px;font-weight:700;color:var(--fg);
  transition:color .22s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-no{font-family:var(--mono);font-size:13px;color:var(--brand);flex:0 0 auto;letter-spacing:.08em;width:28px}
.faq-text{flex:1 1 auto;min-width:0}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 auto}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--fg-2);
  transition:transform .3s var(--ease),background-color .3s var(--ease);
}
.faq-icon::before{width:14px;height:1.5px;transform:translate(-50%,-50%)}
.faq-icon::after{width:1.5px;height:14px;transform:translate(-50%,-50%)}
.faq-item.is-open .faq-icon::before{background:var(--brand)}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);background:var(--brand)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .34s var(--ease)}
.faq-item.is-open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden}
.faq-a-inner p{
  padding:0 4px 26px 52px;
  color:var(--fg-2);font-size:15.5px;line-height:1.9;max-width:78ch;
}

/* ============ CTA + 表单 ============ */
.assist{
  position:relative;isolation:isolate;overflow:hidden;
  border-top:1px solid var(--line);
}
.assist-bg{position:absolute;inset:0;z-index:-2}
.assist-bg img{width:100%;height:100%;object-fit:cover;opacity:.28}
.assist-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(13,15,14,.96) 0%,rgba(13,15,14,.86) 52%,rgba(13,15,14,.72) 100%);
}
.assist-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,460px);gap:64px;align-items:start}
.assist-copy h2{font-size:clamp(26px,3.2vw,40px);font-weight:800;line-height:1.24;letter-spacing:-.02em}
.assist-copy p{margin-top:18px;color:var(--fg-2);max-width:44ch}
.assist-points{display:grid;gap:14px;margin-top:30px}
.assist-points li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--fg-2)}
.assist-points li::before{
  content:"";flex:0 0 auto;margin-top:11px;
  width:6px;height:6px;border-radius:50%;background:var(--brand);
}
.form-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:30px 28px 32px;
  box-shadow:var(--shadow);
}
.form-card h3{font-size:19px;font-weight:800}
.form-card .form-hint{margin-top:8px;font-size:13px;color:var(--fg-3)}
.field{position:relative;margin-top:26px}
.field label{
  display:block;font-size:12.5px;color:var(--fg-3);
  font-family:var(--mono);letter-spacing:.06em;margin-bottom:2px;
  transition:color .22s var(--ease);
}
.field input,.field select,.field textarea{
  width:100%;background:transparent;border:0;border-bottom:1px solid var(--line-strong);
  border-radius:0;padding:9px 0;font-size:15.5px;color:var(--fg);
  transition:border-color .22s var(--ease);
  appearance:none;
}
.field textarea{resize:vertical;min-height:76px;line-height:1.7}
.field select{
  background-image:linear-gradient(45deg,transparent 50%,var(--fg-2) 50%),linear-gradient(135deg,var(--fg-2) 50%,transparent 50%);
  background-position:calc(100% - 13px) 50%,calc(100% - 8px) 50%;
  background-size:5px 5px,5px 5px;background-repeat:no-repeat;
  padding-right:26px;
}
.field select option{background:var(--ink-2);color:var(--fg)}
.field input::placeholder,.field textarea::placeholder{color:var(--fg-3)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-bottom-color:var(--brand)}
.field input:focus + .focus-mark,.field select:focus + .focus-mark{transform:scaleX(1)}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-bottom-color:var(--err)}
.field.has-error label{color:var(--err)}
.field .err-text{
  display:none;margin-top:7px;
  font-family:var(--mono);font-size:12px;color:var(--err);letter-spacing:.02em;
}
.field.has-error .err-text{display:block}
.form-actions{margin-top:32px}
.form-actions .btn{width:100%}
.form-success{
  display:none;text-align:center;padding:26px 8px 8px;
}
.form-success.is-visible{display:block}
.success-mark{
  width:52px;height:52px;margin:0 auto 18px;border-radius:50%;
  background:rgba(95,208,138,.12);border:1px solid rgba(95,208,138,.4);
  display:grid;place-items:center;color:var(--ok);font-size:24px;line-height:1;
}
.form-success h3{font-size:19px;font-weight:800}
.form-success p{margin-top:12px;color:var(--fg-2);font-size:14.5px}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-2);border-top:1px solid var(--line);padding-top:72px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px;padding-bottom:56px}
.footer-brand p{margin-top:18px;color:var(--fg-3);font-size:14px;line-height:1.9;max-width:34ch}
.footer-col h4{
  font-size:13px;font-weight:800;letter-spacing:.14em;
  color:var(--fg);text-transform:uppercase;margin-bottom:18px;
}
.footer-col ul{display:grid;gap:11px}
.footer-col a{font-size:14.5px;color:var(--fg-3)}
.footer-col a:hover{color:var(--brand)}
.footer-col .mono{font-family:var(--mono);font-size:14px;color:var(--fg-3)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:24px 0 32px;border-top:1px solid var(--line);
  font-size:13px;color:var(--fg-3);
}
.back-top{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--fg-2)}
.back-top:hover{color:var(--brand)}

/* ============ 进入动效 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .section{padding:72px 0}
  .hero-inner{grid-template-columns:1fr;gap:38px;align-items:start;padding-bottom:56px}
  .hero-panel{max-width:440px}
  .hero h1{max-width:20ch}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .stat{border-right:0}
  .stat:nth-child(odd){border-right:1px solid var(--line)}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .feature-grid{grid-template-columns:1fr}
  .feature-main{grid-row:auto}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .assist-grid{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
  .channel-note{display:none}
}
@media (max-width:768px){
  body{font-size:15.5px}
  .container{padding:0 20px}
  .section{padding:56px 0}
  .brand-inner{height:66px}
  .site-header.is-scrolled .brand-inner{height:58px}
  .logo-text{font-size:15.5px;white-space:normal;line-height:1.25}
  .logo-mark{width:34px;height:34px;font-size:17px}
  .brand-actions .btn{display:none}
  .menu-toggle{display:grid}
  .channel-inner{height:50px}
  .channels{gap:22px}
  .channel{height:50px;font-size:14.5px}
  .hero{padding-top:52px}
  .hero h1{font-size:clamp(30px,8vw,42px);line-height:1.22}
  .hero-sub{font-size:15.5px}
  .hero-cta{gap:12px}
  .hero-cta .btn{flex:1 1 auto}
  .hero-bar{gap:6px 20px;font-size:12px}
  .flow-item{grid-template-columns:64px 30px minmax(0,1fr);padding-bottom:32px}
  .flow-time{font-size:12.5px}
  .flow-body h3{font-size:17px}
  .feature-side{flex-direction:column;align-items:flex-start;gap:16px}
  .feature-side .feature-media{width:100%;height:auto;aspect-ratio:16/10}
  .section-head{flex-direction:column;align-items:flex-start;gap:20px;margin-bottom:36px}
  .news-grid{grid-template-columns:1fr}
  .faq-q{font-size:15.5px;gap:14px;padding:20px 2px}
  .faq-a-inner p{padding-left:42px;padding-bottom:22px}
  .form-card{padding:24px 20px 26px}
  .footer-grid{grid-template-columns:1fr;gap:34px;padding-bottom:40px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px}
  .assist-copy p{max-width:none}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
  .stat{padding:26px 18px}
  .compare-wrap{margin:0 -16px;padding:0 16px 10px}
  .card-body{padding:18px 18px 20px}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --ink:#0D0F0E;
  --ink-2:#141715;
  --surface:#191D1B;
  --surface-2:#1F2422;
  --line:#262B28;
  --line-2:#333A36;
  --fg:#F1F4F0;
  --fg-2:#A7B0A9;
  --fg-3:#6E7772;
  --brand:#C8F14E;
  --brand-ink:#0D0F0E;
  --accent:#FF7A45;
  --ok:#5FD08A;
  --warn:#F0B84E;
  --err:#F0705F;

  --radius-btn:6px;
  --radius-card:16px;
  --radius-img:12px;
  --radius-badge:4px;

  --shadow-soft:0 12px 32px rgba(0,0,0,.35);
  --shadow-card:0 6px 20px rgba(0,0,0,.22);

  --gap:24px;
  --sec-desktop:96px;
  --sec-tablet:72px;
  --sec-mobile:56px;

  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ============ Reset / base ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink);
  color:var(--fg);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--fg);text-decoration:none;transition:color 220ms var(--ease),border-color 220ms var(--ease),background-color 220ms var(--ease),transform 220ms var(--ease);}
a:hover{color:var(--brand);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{font-weight:800;letter-spacing:-.02em;line-height:1.24;}
p{color:var(--fg-2);}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}
::selection{background:var(--brand);color:var(--brand-ink);}

/* ============ 容器与板块 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:var(--sec-desktop) 0;}
.section-tight{padding:64px 0;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.sec-head h2{font-size:clamp(28px,3.6vw,44px);}
.sec-head .sec-desc{max-width:560px;font-size:15px;color:var(--fg-3);margin-top:10px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);display:block;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:11px 20px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;white-space:nowrap;
  border:1px solid transparent;
  transition:all 220ms var(--ease);
}
.btn-primary{background:var(--brand);color:var(--brand-ink);border-color:var(--brand);}
.btn-primary:hover{filter:brightness(1.08);color:var(--brand-ink);box-shadow:0 0 0 1px rgba(200,241,78,.55);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);}
.btn-outline{background:transparent;color:var(--fg);border-color:var(--line-2);}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-outline:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--fg-2);border-color:transparent;padding-left:4px;padding-right:4px;}
.btn-ghost:hover{color:var(--brand);}
.btn-sm{min-height:38px;padding:8px 15px;font-size:13.5px;border-radius:6px;}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--fg-2);}
.link-arrow span{transition:transform 220ms var(--ease);}
.link-arrow:hover{color:var(--brand);}
.link-arrow:hover span{transform:translateX(4px);}

/* ============ 标签 / 徽章 ============ */
.badge{
  display:inline-block;padding:3px 9px;border-radius:var(--radius-badge);
  font-size:12px;font-weight:700;letter-spacing:.04em;
  background:rgba(200,241,78,.12);color:var(--brand);border:1px solid rgba(200,241,78,.28);
}
.badge-accent{background:rgba(255,122,69,.12);color:var(--accent);border-color:rgba(255,122,69,.3);}
.badge-muted{background:rgba(167,176,169,.1);color:var(--fg-2);border-color:var(--line-2);}

/* ============ 头部 / 导航 ============ */
.site-header{position:sticky;top:0;z-index:60;background:rgba(13,15,14,.96);border-bottom:1px solid var(--line);}
.brand-bar{padding:14px 0;transition:padding 220ms var(--ease);}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.logo{display:inline-flex;align-items:center;gap:10px;white-space:nowrap;}
.logo-mark{
  width:34px;height:34px;flex:none;border-radius:8px;
  background:var(--brand);color:var(--brand-ink);
  display:grid;place-items:center;
  font-family:var(--font-mono);font-weight:700;font-size:19px;
}
.logo-text{font-size:19px;font-weight:800;letter-spacing:-.02em;color:var(--fg);}
.logo:hover .logo-text{color:var(--brand);}
.brand-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:40px;height:40px;border-radius:8px;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--fg-2);
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand);}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:8px;border:1px solid var(--line);
  position:relative;
}
.menu-toggle span,.menu-toggle span::before,.menu-toggle span::after{
  content:"";position:absolute;left:50%;width:18px;height:2px;background:var(--fg);transform:translateX(-50%);
  transition:transform 220ms var(--ease),opacity 220ms var(--ease);
}
.menu-toggle span{top:50%;margin-top:-1px;}
.menu-toggle span::before{top:-6px;}
.menu-toggle span::after{top:6px;}
.menu-toggle[aria-expanded="true"] span{background:transparent;}
.menu-toggle[aria-expanded="true"] span::before{transform:translateX(-50%) rotate(45deg);top:0;}
.menu-toggle[aria-expanded="true"] span::after{transform:translateX(-50%) rotate(-45deg);top:0;}

.channel-bar{border-top:1px solid var(--line);background:var(--ink-2);}
.channel-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;}
.channels{display:flex;align-items:stretch;gap:4px;overflow-x:auto;scrollbar-width:none;}
.channels::-webkit-scrollbar{display:none;}
.channel{
  position:relative;display:inline-flex;align-items:center;
  padding:15px 14px;font-size:15px;font-weight:600;color:var(--fg-2);
  white-space:nowrap;min-height:44px;
}
.channel::after{content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;background:transparent;transition:background 220ms var(--ease);}
.channel:hover{color:var(--fg);}
.channel.is-active{color:var(--brand);}
.channel.is-active::after{background:var(--brand);}
.channel-note{font-size:12.5px;color:var(--fg-3);white-space:nowrap;}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:0;z-index:90;background:var(--ink);
  transform:translateY(-100%);transition:transform 280ms var(--ease);
  display:flex;flex-direction:column;padding:22px 24px 32px;overflow-y:auto;
}
.drawer.is-open{transform:translateY(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
.drawer-close{width:44px;height:44px;border:1px solid var(--line);border-radius:8px;font-size:20px;color:var(--fg-2);}
.drawer-nav{display:flex;flex-direction:column;gap:2px;}
.drawer-nav a{
  padding:15px 4px;font-size:17px;font-weight:600;color:var(--fg-2);
  border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;
}
.drawer-nav a.is-active{color:var(--brand);}
.drawer-foot{margin-top:auto;padding-top:26px;display:flex;flex-direction:column;gap:12px;}

/* ============ 内页 banner ============ */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  opacity:.34;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(13,15,14,.82) 0%,rgba(13,15,14,.92) 62%,rgba(13,15,14,1) 100%),
    repeating-linear-gradient(0deg,rgba(255,255,255,.035) 0 1px,transparent 1px 5px);
}
.page-hero .container{position:relative;z-index:2;}
.page-hero-inner{padding:66px 0 58px;max-width:900px;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--fg-3);margin-bottom:22px;}
.crumbs a{color:var(--fg-3);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{color:var(--fg-3);opacity:.6;}
.crumbs strong{color:var(--fg-2);font-weight:600;}
.page-hero h1{font-size:clamp(34px,5.2vw,60px);margin-bottom:20px;}
.page-hero h1 em{font-style:normal;color:var(--brand);}
.page-hero .lead{font-size:17px;color:var(--fg-2);max-width:720px;margin-bottom:26px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:12.5px;color:var(--fg-3);font-family:var(--font-mono);margin-top:26px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;}

/* ============ 数据条 ============ */
.stat-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--ink-2);}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.stat{padding:30px 26px;border-left:1px solid var(--line);}
.stat:first-child{border-left:0;}
.stat .num{font-family:var(--font-mono);font-size:clamp(28px,3.4vw,40px);font-weight:700;color:var(--fg);letter-spacing:-.02em;line-height:1.1;}
.stat .num i{font-style:normal;color:var(--brand);font-size:.62em;margin-left:2px;}
.stat .lbl{font-size:13.5px;color:var(--fg-3);margin-top:6px;}

/* ============ 左右分栏（粘性说明 + 编号清单） ============ */
.split{display:grid;grid-template-columns:340px minmax(0,1fr);gap:56px;align-items:start;}
.side-sticky{position:sticky;top:130px;}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow-card);
}
.side-card h3{font-size:19px;margin-bottom:12px;}
.side-card p{font-size:14.5px;line-height:1.8;}
.side-list{margin:18px 0 22px;display:flex;flex-direction:column;gap:10px;}
.side-list li{display:flex;gap:10px;font-size:14px;color:var(--fg-2);}
.side-list li::before{content:"";flex:none;width:6px;height:6px;margin-top:9px;border-radius:2px;background:var(--brand);}
.side-fig{margin-top:22px;border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line);}
.side-fig img{width:100%;aspect-ratio:16/10;object-fit:cover;}

.entry-list{border-top:1px solid var(--line);}
.entry{
  display:grid;grid-template-columns:74px minmax(0,1fr);gap:20px;
  padding:26px 4px;border-bottom:1px solid var(--line);
  transition:background 220ms var(--ease);
}
.entry:hover{background:rgba(200,241,78,.03);}
.entry-no{
  font-family:var(--font-mono);font-size:20px;font-weight:700;color:var(--fg-3);
  padding-top:2px;transition:color 220ms var(--ease);
}
.entry:hover .entry-no{color:var(--brand);}
.entry h3{font-size:19px;margin-bottom:8px;}
.entry p{font-size:15px;line-height:1.8;}
.entry .entry-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;font-family:var(--font-mono);font-size:12px;color:var(--fg-3);}
.entry .entry-tags span{border:1px solid var(--line);border-radius:var(--radius-badge);padding:2px 8px;}

/* 强调小结条 */
.note-strip{
  display:flex;gap:14px;align-items:flex-start;
  border-left:3px solid var(--accent);background:rgba(255,122,69,.06);
  border-radius:0 var(--radius-btn) var(--radius-btn) 0;
  padding:16px 20px;margin:26px 0;
}
.note-strip strong{color:var(--accent);font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;flex:none;padding-top:2px;}
.note-strip p{font-size:14.5px;color:var(--fg-2);}

/* ============ 场景条带 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;}
.scene{background:var(--surface);padding:28px 26px;transition:background 220ms var(--ease);}
.scene:hover{background:var(--surface-2);}
.scene-top{display:flex;align-items:center;gap:12px;margin-bottom:12px;}
.scene-top .ico{
  width:38px;height:38px;flex:none;border-radius:9px;border:1px solid var(--line-2);
  display:grid;place-items:center;color:var(--brand);font-family:var(--font-mono);font-size:14px;
}
.scene h3{font-size:18px;}
.scene p{font-size:14.5px;line-height:1.8;}

/* ============ 流程 ============ */
.flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;counter-reset:flow;}
.flow-step{position:relative;padding-top:26px;border-top:1px solid var(--line-2);}
.flow-step::before{
  counter-increment:flow;content:"0" counter(flow);
  position:absolute;top:-13px;left:0;
  font-family:var(--font-mono);font-size:12px;color:var(--ink);
  background:var(--brand);border-radius:var(--radius-badge);padding:3px 8px;font-weight:700;
}
.flow-step h3{font-size:17px;margin-bottom:8px;}
.flow-step p{font-size:14px;line-height:1.78;}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:grid;grid-template-columns:56px minmax(0,1fr) 28px;align-items:center;gap:14px;
  padding:22px 4px;text-align:left;font-size:17px;font-weight:700;color:var(--fg);
  transition:color 220ms var(--ease);
}
.faq-q:hover{color:var(--brand);}
.faq-no{font-family:var(--font-mono);font-size:13px;color:var(--fg-3);font-weight:500;}
.faq-ico{position:relative;width:16px;height:16px;justify-self:end;}
.faq-ico::before,.faq-ico::after{content:"";position:absolute;background:var(--brand);transition:transform 240ms var(--ease),opacity 240ms var(--ease);}
.faq-ico::before{left:0;top:7px;width:16px;height:2px;}
.faq-ico::after{left:7px;top:0;width:2px;height:16px;}
.faq-item.is-open .faq-ico::after{transform:rotate(90deg);opacity:0;}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows 260ms var(--ease);}
.faq-item.is-open .faq-a{grid-template-rows:1fr;}
.faq-a-inner{overflow:hidden;}
.faq-a p{padding:0 4px 24px 70px;font-size:15px;line-height:1.85;}

/* ============ CTA 与表单 ============ */
.cta-block{
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  background:var(--surface);
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
}
.cta-left{padding:44px 40px;border-right:1px solid var(--line);position:relative;overflow:hidden;}
.cta-left::after{
  content:"";position:absolute;right:-70px;bottom:-70px;width:210px;height:210px;border-radius:50%;
  background:radial-gradient(circle,rgba(200,241,78,.16),transparent 68%);
}
.cta-left h2{font-size:clamp(24px,2.6vw,32px);margin-bottom:14px;}
.cta-left p{font-size:15px;}
.cta-left ul{margin-top:20px;display:flex;flex-direction:column;gap:10px;}
.cta-left li{display:flex;gap:10px;font-size:14px;color:var(--fg-2);}
.cta-left li::before{content:"—";color:var(--brand);font-family:var(--font-mono);}
.cta-right{padding:40px;}
.field{margin-bottom:26px;position:relative;}
.field label{
  display:block;font-size:12.5px;color:var(--fg-3);font-family:var(--font-mono);
  letter-spacing:.06em;margin-bottom:8px;transition:color 220ms var(--ease);
}
.field input,.field select,.field textarea{
  width:100%;background:transparent;border:0;border-bottom:1px solid var(--line-2);
  padding:8px 2px;font-size:15.5px;color:var(--fg);border-radius:0;
  transition:border-color 220ms var(--ease);
  appearance:none;
}
.field select{background-image:linear-gradient(45deg,transparent 50%,var(--fg-3) 50%),linear-gradient(135deg,var(--fg-3) 50%,transparent 50%);background-position:calc(100% - 13px) 18px,calc(100% - 8px) 18px;background-size:5px 5px;background-repeat:no-repeat;}
.field textarea{resize:vertical;min-height:70px;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-bottom-color:var(--brand);}
.field input:focus+label,.field select:focus+label,.field textarea:focus+label{color:var(--brand);}
.field.has-err input,.field.has-err select,.field.has-err textarea{border-bottom-color:var(--err);}
.field .err-msg{display:none;font-family:var(--font-mono);font-size:12px;color:var(--err);margin-top:7px;}
.field.has-err .err-msg{display:block;}
.form-foot{display:flex;flex-wrap:wrap;align-items:center;gap:16px;}
.form-tip{font-size:12.5px;color:var(--fg-3);}
.form-success{
  display:none;border:1px dashed var(--ok);border-radius:var(--radius-btn);
  padding:32px 26px;text-align:center;
}
.form-success.is-on{display:block;}
.form-success .tick{
  width:44px;height:44px;margin:0 auto 14px;border-radius:50%;
  border:1px solid var(--ok);color:var(--ok);display:grid;place-items:center;font-size:20px;
}
.form-success p{color:var(--fg-2);font-size:15px;}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--line);background:var(--ink-2);margin-top:var(--sec-desktop);}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding:64px 0 48px;}
.footer-brand p{font-size:14px;color:var(--fg-3);margin-top:16px;max-width:300px;line-height:1.8;}
.footer-col h4{font-size:14px;letter-spacing:.1em;color:var(--fg);margin-bottom:18px;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col li{font-size:14px;color:var(--fg-3);}
.footer-col a{color:var(--fg-3);}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--fg-3);}
.back-top{font-size:13px;color:var(--fg-3);font-family:var(--font-mono);display:inline-flex;align-items:center;gap:8px;min-height:44px;}
.back-top:hover{color:var(--brand);}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 600ms var(--ease),transform 600ms var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ============ 断点 ============ */
@media (max-width:1100px){
  .split{grid-template-columns:1fr;gap:36px;}
  .side-sticky{position:static;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media (max-width:1024px){
  .section{padding:var(--sec-tablet) 0;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .stat:nth-child(3){border-left:0;}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line);}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
  .cta-block{grid-template-columns:1fr;}
  .cta-left{border-right:0;border-bottom:1px solid var(--line);padding:36px 30px;}
  .cta-right{padding:32px 30px;}
}
@media (max-width:820px){
  .brand-actions .btn{display:none;}
  .menu-toggle{display:block;}
  .channel-note{display:none;}
  .scene-grid{grid-template-columns:1fr;}
  .faq-a p{padding-left:4px;}
  .faq-q{grid-template-columns:40px minmax(0,1fr) 24px;font-size:16px;}
}
@media (max-width:640px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .section{padding:var(--sec-mobile) 0;}
  .sec-head{flex-direction:column;align-items:flex-start;margin-bottom:28px;}
  .page-hero-inner{padding:44px 0 40px;}
  .brand-bar{padding:10px 0;}
  .logo-text{font-size:16.5px;}
  .entry{grid-template-columns:1fr;gap:8px;padding:22px 0;}
  .entry-no{font-size:15px;}
  .flow{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;padding:44px 0 34px;}
  .footer-brand p{max-width:none;}
  .hero-cta .btn{width:100%;}
  .cta-left,.cta-right{padding:26px 20px;}
}
@media (max-width:420px){
  .page-hero h1{font-size:30px;}
  .stat{padding:22px 16px;}
}

/* roulang page: article */
:root{
  --ink:#0D0F0E;
  --ink-2:#141715;
  --surface:#191D1B;
  --line:#262B28;
  --fg:#F1F4F0;
  --fg-2:#A7B0A9;
  --fg-3:#6E7772;
  --brand:#C8F14E;
  --brand-ink:#0D0F0E;
  --accent:#FF7A45;
  --ok:#5FD08A;
  --warn:#F0B84E;
  --err:#F0705F;
  --r-sm:6px;
  --r-md:12px;
  --r-lg:16px;
  --shadow:0 12px 32px rgba(0,0,0,.35);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink);
  color:var(--fg);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.drawer-open::after{
  content:"";position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:90;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.3}
p{margin:0}
ul,ol{margin:0}
.mono{font-family:var(--mono);letter-spacing:0}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand);color:var(--brand-ink)}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(13,15,14,.94);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease);
}
.site-header.is-stuck{box-shadow:var(--shadow)}
.brand-bar{border-bottom:1px solid var(--line)}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.02em;white-space:nowrap;min-width:0}
.logo-mark{
  flex:0 0 auto;width:32px;height:32px;border-radius:8px;
  background:var(--brand);color:var(--brand-ink);
  display:grid;place-items:center;font-weight:900;font-size:16px;font-family:var(--mono);
}
.logo-text{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.brand-actions{display:flex;align-items:center;gap:10px}
.icon-btn{
  width:44px;height:44px;border-radius:var(--r-sm);border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--fg-2);
  transition:border-color .22s var(--ease),color .22s var(--ease),background .22s var(--ease);
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--ink-2)}
.menu-toggle{
  display:none;position:relative;z-index:120;width:44px;height:44px;
  border:1px solid var(--line);border-radius:var(--r-sm);background:transparent;
}
.menu-toggle span,.menu-toggle span::before,.menu-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--fg);
  transform:translateX(-50%);transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.menu-toggle span{top:50%;margin-top:-1px}
.menu-toggle span::before{content:"";top:-6px;left:0;transform:none}
.menu-toggle span::after{content:"";top:6px;left:0;transform:none}
.menu-toggle[aria-expanded="true"] span{background:transparent}
.menu-toggle[aria-expanded="true"] span::before{transform:rotate(45deg) translateY(6px);background:var(--brand)}
.menu-toggle[aria-expanded="true"] span::after{transform:rotate(-45deg) translateY(-6px);background:var(--brand)}

.channel-bar{background:var(--ink)}
.channel-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:52px}
.channels{display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:none}
.channels::-webkit-scrollbar{display:none}
.channel{
  position:relative;padding:8px 14px;border-radius:var(--r-sm);
  font-size:15px;color:var(--fg-2);white-space:nowrap;
  transition:color .22s var(--ease),background .22s var(--ease);
}
.channel:hover{color:var(--fg);background:var(--ink-2)}
.channel.is-active{color:var(--fg);font-weight:600}
.channel.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:-2px;height:2px;
  background:var(--brand);border-radius:2px;
}
.channel-note{font-size:12.5px;color:var(--fg-3);white-space:nowrap}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-sm);font-size:15px;font-weight:600;
  border:1px solid transparent;white-space:nowrap;min-height:44px;
  transition:transform .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-sm{padding:8px 16px;font-size:14px;min-height:40px}
.btn-primary{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}
.btn-primary:hover{background:#D6FA63;box-shadow:0 0 0 1px rgba(200,241,78,.55);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);background:#BCE33F}
.btn-outline{background:transparent;color:var(--fg-2);border-color:var(--line)}
.btn-outline:hover{color:var(--brand);border-color:var(--brand)}
.btn-outline:active{color:var(--brand);background:rgba(200,241,78,.08)}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;transform:none;box-shadow:none}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;padding:3px 10px;border-radius:4px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  background:var(--ink-2);color:var(--fg-2);border:1px solid var(--line);
}
.badge-brand{background:rgba(200,241,78,.12);color:var(--brand);border-color:rgba(200,241,78,.35)}
.tag{
  display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;
  font-size:13.5px;color:var(--fg-2);border:1px solid var(--line);background:var(--surface);
  transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.tag:hover{color:var(--brand);border-color:rgba(200,241,78,.45);transform:translateY(-2px)}

/* ============ 文章头部 ============ */
.article-hero{
  position:relative;padding:52px 0 44px;overflow:hidden;
  background:var(--ink-2) url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(13,15,14,.94) 0%,rgba(13,15,14,.88) 55%,rgba(13,15,14,.96) 100%);
}
.article-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(255,255,255,.035) 0 1px,transparent 1px 44px);
}
.article-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13.5px;color:var(--fg-3);margin-bottom:22px}
.breadcrumb a{color:var(--fg-2);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span[aria-current]{color:var(--fg-3);max-width:56ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:14px;margin-bottom:18px}
.article-meta .meta-item{font-size:13px;color:var(--fg-3)}
.article-title{
  font-size:clamp(30px,4.4vw,46px);font-weight:900;line-height:1.24;
  max-width:20ch;margin-bottom:20px;
}
.article-lead{
  max-width:70ch;font-size:16.5px;line-height:1.9;color:var(--fg-2);
  padding-left:16px;border-left:3px solid var(--brand);
}

/* ============ 正文与目录 ============ */
.section{padding:64px 0}
.article-layout{
  display:grid;grid-template-columns:minmax(0,760px) 232px;
  gap:56px;justify-content:center;align-items:start;
}
.article-content{min-width:0;font-size:17px;line-height:1.9;color:#D8E0D8}
.article-content > *:first-child{margin-top:0}
.article-content h2{
  font-size:clamp(23px,2.4vw,29px);line-height:1.4;color:var(--fg);
  margin:2.2em 0 .9em;padding-left:14px;border-left:3px solid var(--brand);
  scroll-margin-top:120px;
}
.article-content h3{
  font-size:20px;line-height:1.5;color:var(--fg);margin:1.8em 0 .7em;
  scroll-margin-top:120px;
}
.article-content h4{font-size:17px;color:var(--fg);margin:1.6em 0 .6em}
.article-content p{margin:1.05em 0}
.article-content strong{color:var(--fg);font-weight:700}
.article-content em{color:var(--brand);font-style:normal}
.article-content a{color:var(--brand);border-bottom:1px solid rgba(200,241,78,.4);transition:border-color .2s var(--ease)}
.article-content a:hover{border-bottom-color:var(--brand)}
.article-content ul,.article-content ol{margin:1.1em 0;padding-left:1.35em}
.article-content li{margin:.5em 0}
.article-content ul li::marker{color:var(--brand)}
.article-content ol li::marker{color:var(--brand);font-family:var(--mono);font-size:.92em}
.article-content blockquote{
  margin:1.8em 0;padding:16px 20px;border-left:3px solid var(--accent);
  background:var(--ink-2);border-radius:0 var(--r-md) var(--r-md) 0;color:var(--fg-2);
}
.article-content blockquote p{margin:.4em 0}
.article-content img{
  border-radius:var(--r-md);border:1px solid var(--line);margin:1.8em auto;max-width:100%;
}
.article-content figure{margin:1.8em 0}
.article-content figcaption{font-size:13px;color:var(--fg-3);text-align:center;margin-top:10px}
.article-content hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}
.article-content code{
  font-family:var(--mono);font-size:.9em;padding:2px 6px;border-radius:4px;
  background:var(--ink-2);border:1px solid var(--line);color:var(--brand);
}
.article-content pre{
  margin:1.6em 0;padding:16px 18px;border-radius:var(--r-md);
  background:var(--ink-2);border:1px solid var(--line);overflow-x:auto;
}
.article-content pre code{background:none;border:0;padding:0;color:var(--fg);font-size:14px;line-height:1.7}
.article-content table{
  width:100%;border-collapse:collapse;margin:1.8em 0;font-size:15px;
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
}
.article-content th,.article-content td{padding:11px 14px;border:1px solid var(--line);text-align:left;vertical-align:top}
.article-content th{background:var(--ink-2);color:var(--fg);font-weight:700;white-space:nowrap}
.article-content td{color:var(--fg-2)}

.article-toc{position:sticky;top:112px;align-self:start}
.article-toc.is-hidden{display:none !important}
.toc-title{
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--fg-3);
  margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line);
}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:62vh;overflow-y:auto}
.toc-link{
  display:block;padding:7px 0 7px 12px;font-size:13.5px;line-height:1.5;color:var(--fg-3);
  border-left:2px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease);
}
.toc-link:hover{color:var(--fg-2)}
.toc-link.is-sub{padding-left:24px;font-size:13px}
.toc-link.is-active{color:var(--brand);border-left-color:var(--brand)}

/* ============ 空态 ============ */
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-lg);
  padding:56px 28px;text-align:center;background:var(--surface);
}
.empty-title{font-size:20px;font-weight:800;color:var(--fg);margin-bottom:10px}
.empty-text{font-size:15px;color:var(--fg-2);max-width:46ch;margin:0 auto 24px}

/* ============ 标签与相关推荐 ============ */
.sub-section{padding:0 0 72px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:56px;padding-top:8px;border-top:1px solid var(--line)}
.tag-label{font-size:13px;color:var(--fg-3);align-self:center;margin-right:4px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px}
.section-head h2{font-size:clamp(22px,2.4vw,30px)}
.section-head .more{font-size:14px;color:var(--fg-2);transition:color .2s var(--ease)}
.section-head .more:hover{color:var(--brand)}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{border-color:rgba(200,241,78,.32);transform:translateY(-2px);box-shadow:var(--shadow)}
.card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--ink-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-top{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--fg-3)}
.card-title{font-size:18px;font-weight:700;line-height:1.5;color:var(--fg)}
.card-text{font-size:14px;line-height:1.8;color:var(--fg-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-link{
  margin-top:auto;display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
}
.card-link span.arrow{transition:transform .22s var(--ease)}
.card:hover .card-link span.arrow{transform:translateX(4px)}

/* ============ 返回入口 ============ */
.back-row{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-top:48px;padding:24px 26px;border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--surface);
}
.back-row p{font-size:15px;color:var(--fg-2)}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;
  padding:20px 4px;font-size:16.5px;font-weight:600;color:var(--fg);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-num{font-size:13px;color:var(--fg-3);flex:0 0 auto;min-width:26px}
.faq-text{flex:1;min-width:0}
.faq-icon{position:relative;flex:0 0 auto;width:16px;height:16px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
  transition:transform .28s var(--ease),opacity .28s var(--ease);
}
.faq-icon::before{left:0;top:7px;width:16px;height:2px}
.faq-icon::after{left:7px;top:0;width:2px;height:16px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s var(--ease)}
.faq-item.is-open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden}
.faq-a-inner p{padding:0 4px 22px 42px;font-size:15px;color:var(--fg-2);max-width:78ch}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--line);background:var(--ink-2);padding-top:56px;margin-top:24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--fg-3);max-width:36ch}
.footer-col h4{
  font-size:13px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--fg);margin-bottom:16px;font-weight:700;
}
.footer-col ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-col li{font-size:14px;color:var(--fg-3)}
.footer-col a{color:var(--fg-2);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:20px;padding-bottom:24px;border-top:1px solid var(--line);
}
.footer-bottom p{font-size:13px;color:var(--fg-3)}
.back-top{font-size:13px;color:var(--fg-2);transition:color .2s var(--ease)}
.back-top:hover{color:var(--brand)}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .card,.btn,.tag{transition:none}
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,760px)}
  .article-toc{display:none}
}
@media (max-width:1024px){
  .container{padding:0 20px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section{padding:56px 0}
}
@media (max-width:900px){
  .channel-note{display:none}
  .menu-toggle{display:inline-flex}
  .channels{
    position:fixed;top:0;right:0;bottom:0;left:auto;width:min(320px,86vw);
    flex-direction:column;align-items:stretch;gap:6px;
    background:var(--ink-2);border-left:1px solid var(--line);
    padding:96px 20px 28px;overflow-y:auto;z-index:110;
    transform:translateX(101%);transition:transform .28s var(--ease);
  }
  .channels.is-open{transform:translateX(0)}
  .channel{padding:14px 12px;font-size:16px;border-radius:8px}
  .channel.is-active{background:rgba(200,241,78,.08)}
  .channel.is-active::after{display:none}
}
@media (max-width:768px){
  body{font-size:15.5px}
  .logo{font-size:16px}
  .logo-mark{width:28px;height:28px;font-size:14px;border-radius:7px}
  .brand-actions .btn-outline{display:none}
  .article-hero{padding:36px 0 32px}
  .article-title{max-width:none}
  .article-lead{font-size:15.5px;padding-left:13px}
  .section{padding:48px 0}
  .sub-section{padding-bottom:56px}
  .article-content{font-size:16px}
  .card-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .faq-a-inner p{padding-left:4px}
  .back-row{padding:20px;flex-direction:column;align-items:flex-start}
  .article-content table{display:block;overflow-x:auto;white-space:nowrap}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .brand-inner{min-height:64px;gap:10px}
  .brand-actions{gap:8px}
  .article-title{font-size:26px}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px}
  .faq-q{font-size:15.5px;gap:12px;padding:18px 0}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: category3 */
:root{
  --ink:#0D0F0E;
  --ink-2:#141715;
  --surface:#191D1B;
  --line:#262B28;
  --fg:#F1F4F0;
  --fg-2:#A7B0A9;
  --fg-3:#6E7772;
  --brand:#C8F14E;
  --brand-ink:#0D0F0E;
  --accent:#FF7A45;
  --ok:#5FD08A;
  --warn:#F0B84E;
  --err:#F0705F;
  --r-btn:6px;
  --r-card:16px;
  --r-img:12px;
  --r-badge:4px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow:0 12px 32px rgba(0,0,0,.35);
  --max:1200px;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--fg);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.2}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.mono{font-family:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",monospace;letter-spacing:0}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
@media (max-width:520px){.container{padding:0 16px}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(13,15,14,.96);border-bottom:1px solid var(--line);transition:padding .22s var(--ease)}
.brand-bar{border-bottom:1px solid var(--line)}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px;padding-top:10px;padding-bottom:10px}
.logo{display:inline-flex;align-items:center;gap:10px;white-space:nowrap}
.logo-mark{
  width:30px;height:30px;flex:0 0 30px;border-radius:8px;
  background:var(--brand);color:var(--brand-ink);
  display:grid;place-items:center;font-weight:900;font-size:17px;line-height:1;
}
.logo-text{font-weight:800;font-size:17px;letter-spacing:-.01em}
.brand-actions{display:flex;align-items:center;gap:10px}
.icon-btn{
  width:40px;height:40px;display:grid;place-items:center;
  border:1px solid var(--line);border-radius:var(--r-btn);background:transparent;
  color:var(--fg-2);cursor:pointer;transition:border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.icon-btn:hover{border-color:rgba(200,241,78,.6);color:var(--brand)}
.icon-btn:active{transform:translateY(1px)}
.menu-toggle{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-btn);background:transparent;cursor:pointer;position:relative}
.menu-toggle span,.menu-toggle span::before,.menu-toggle span::after{
  position:absolute;left:50%;transform:translateX(-50%);
  width:16px;height:2px;background:var(--fg);border-radius:2px;content:"";
}
.menu-toggle span{top:50%;margin-top:-1px}
.menu-toggle span::before{top:-5px}
.menu-toggle span::after{top:5px}
.channel-bar{background:var(--ink-2)}
.channel-inner{display:flex;align-items:center;justify-content:space-between;gap:16px}
.channels{display:flex;align-items:center;gap:26px;overflow-x:auto;scrollbar-width:none}
.channels::-webkit-scrollbar{display:none}
.channel{
  position:relative;padding:14px 2px;font-size:15px;color:var(--fg-2);
  white-space:nowrap;transition:color .2s var(--ease);
}
.channel::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease)}
.channel:hover{color:var(--fg)}
.channel:hover::after{transform:scaleX(1)}
.channel.is-active{color:var(--fg);font-weight:600}
.channel.is-active::after{transform:scaleX(1)}
.channel-note{font-size:12.5px;color:var(--fg-3);white-space:nowrap}
@media (max-width:900px){
  .menu-toggle{display:block}
  .brand-actions .btn-sm{display:none}
  .channel-note{display:none}
}
.drawer{
  position:fixed;inset:0;z-index:70;background:var(--ink);
  transform:translateY(-100%);transition:transform .3s var(--ease);
  display:flex;flex-direction:column;padding:22px 20px;
}
.drawer.is-open{transform:translateY(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
.drawer-close{width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-btn);background:transparent;cursor:pointer;font-size:20px;line-height:1;color:var(--fg)}
.drawer nav{display:flex;flex-direction:column;gap:4px}
.drawer nav a{padding:15px 4px;border-bottom:1px solid var(--line);font-size:17px;color:var(--fg-2)}
.drawer nav a.is-active{color:var(--brand)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-weight:700;font-size:15px;white-space:nowrap;cursor:pointer;
  border:1px solid transparent;background:transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--brand);color:var(--brand-ink)}
.btn-primary:hover{background:#d6f773;box-shadow:0 0 0 1px rgba(200,241,78,.55)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{border-color:var(--line);color:var(--fg)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-outline:active{transform:translateY(1px)}
.btn-sm{min-height:38px;padding:0 15px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn:disabled{opacity:.5;pointer-events:none}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(13,15,14,.86),rgba(13,15,14,.96)),url("/assets/images/backpic/back-3.webp");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(241,244,240,.05) 0 1px,transparent 1px 56px);
  opacity:.7;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;
  padding:76px 24px 84px;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--fg-3);margin-bottom:20px}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--fg-3);opacity:.6}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-family:ui-monospace,Consolas,monospace;
  color:var(--brand);border:1px solid rgba(200,241,78,.35);
  border-radius:var(--r-badge);padding:5px 10px;margin-bottom:22px;
  background:rgba(200,241,78,.06);
}
.page-hero h1{font-size:clamp(38px,5.4vw,68px);font-weight:900;margin:0 0 18px}
.page-hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{font-size:18px;color:var(--fg-2);max-width:34em;margin-bottom:30px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px}
.hero-art{
  position:relative;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;background:var(--surface);box-shadow:var(--shadow);
  aspect-ratio:16/11;
}
.hero-art img{width:100%;height:100%;object-fit:cover}
.hero-art figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:14px 16px;
  background:linear-gradient(180deg,transparent,rgba(13,15,14,.92));
  font-size:13px;color:var(--fg-2);
}
.hero-strip{
  position:relative;z-index:2;border-top:1px solid var(--line);
  background:rgba(13,15,14,.7);
}
.hero-strip .container{
  display:flex;flex-wrap:wrap;gap:12px 34px;padding:16px 24px;
  font-family:ui-monospace,Consolas,monospace;font-size:13px;color:var(--fg-2);
}
.hero-strip b{color:var(--brand);font-weight:600}
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:34px;padding:56px 24px 62px}
  .hero-art{max-width:560px}
}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section.tight{padding:76px 0}
.section.alt{background:var(--ink-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:44px}
.eyebrow{
  font-family:ui-monospace,Consolas,monospace;font-size:12.5px;color:var(--brand);
  letter-spacing:.08em;text-transform:uppercase;margin-bottom:14px;display:block;
}
.section-head h2{font-size:clamp(26px,3.4vw,42px);margin-bottom:16px}
.section-head p{color:var(--fg-2);font-size:16.5px}
@media (max-width:768px){
  .section{padding:60px 0}
  .section.tight{padding:52px 0}
  .section-head{margin-bottom:30px}
}

/* ---------- spec list (双列参数) ---------- */
.spec-group{margin-bottom:14px}
.spec-group-title{
  display:flex;align-items:baseline;gap:12px;
  padding:0 0 14px;margin-bottom:4px;
  font-size:14px;color:var(--fg-3);font-family:ui-monospace,Consolas,monospace;
}
.spec-group-title b{color:var(--fg);font-weight:700;font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;font-size:15px;letter-spacing:0}
.spec-row{
  display:grid;grid-template-columns:minmax(180px,.65fr) 1.35fr;gap:8px 34px;
  padding:22px 0;border-top:1px solid var(--line);
  transition:background .22s var(--ease);
}
.spec-row:hover{background:rgba(200,241,78,.03)}
.spec-key{font-size:17px;font-weight:700;letter-spacing:-.01em}
.spec-key span{display:block;font-family:ui-monospace,Consolas,monospace;font-size:12.5px;color:var(--fg-3);font-weight:400;margin-top:6px}
.spec-desc{color:var(--fg-2);font-size:16px}
.spec-note{
  display:flex;gap:14px;align-items:flex-start;
  margin:26px 0 40px;padding:16px 20px;
  border-left:3px solid var(--brand);
  background:rgba(200,241,78,.06);
  border-radius:0 var(--r-btn) var(--r-btn) 0;
}
.spec-note strong{color:var(--brand);font-weight:700;white-space:nowrap}
.spec-note span{color:var(--fg-2);font-size:15.5px}
@media (max-width:768px){
  .spec-row{grid-template-columns:1fr;gap:8px;padding:18px 0}
  .spec-note{margin:20px 0 32px}
}

/* ---------- scene cards ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap)}
.scene-card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.scene-card:hover{border-color:rgba(200,241,78,.32);transform:translateY(-2px);box-shadow:var(--shadow)}
.scene-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--ink-2)}
.scene-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.scene-card:hover .thumb img{transform:scale(1.03)}
.scene-body{padding:24px 24px 26px}
.scene-body h3{font-size:20px;margin-bottom:10px}
.scene-body p{color:var(--fg-2);font-size:15.5px}
.scene-card.wide{grid-column:span 2}
.scene-card.wide .thumb{aspect-ratio:21/8}
.link-more{display:inline-flex;align-items:center;gap:6px;margin-top:18px;color:var(--brand);font-size:14.5px;font-weight:600}
.link-more span{transition:transform .22s var(--ease)}
.scene-card:hover .link-more span,.link-more:hover span{transform:translateX(4px)}
@media (max-width:848px){
  .scene-grid{grid-template-columns:1fr}
  .scene-card.wide{grid-column:span 1}
  .scene-card.wide .thumb{aspect-ratio:16/10}
}

/* ---------- check list (现象 / 建议) ---------- */
.check-list{border-top:1px solid var(--line)}
.check-item{
  display:grid;grid-template-columns:56px minmax(180px,.7fr) 1.3fr;gap:6px 26px;align-items:start;
  padding:24px 0;border-bottom:1px solid var(--line);
}
.check-idx{font-family:ui-monospace,Consolas,monospace;font-size:13px;color:var(--fg-3);padding-top:4px}
.check-name{font-size:17px;font-weight:700}
.check-fix{color:var(--fg-2);font-size:15.5px}
.check-fix b{color:var(--ok);font-weight:600}
@media (max-width:768px){
  .check-item{grid-template-columns:44px 1fr;gap:4px 14px}
  .check-fix{grid-column:2}
}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.stat{
  border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--surface);padding:26px 22px;
}
.stat b{display:block;font-family:ui-monospace,Consolas,monospace;font-size:clamp(28px,3.2vw,40px);color:var(--brand);font-weight:700;line-height:1.1}
.stat span{display:block;margin-top:10px;color:var(--fg-2);font-size:14.5px}
@media (max-width:900px){.stats{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.stats{grid-template-columns:1fr}}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);counter-reset:step}
.step{position:relative;padding-top:26px;border-top:2px solid var(--line)}
.step::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  position:absolute;top:-15px;left:0;
  font-family:ui-monospace,Consolas,monospace;font-size:12.5px;
  color:var(--brand-ink);background:var(--brand);border-radius:var(--r-badge);
  padding:2px 8px;line-height:1.7;
}
.step h3{font-size:18px;margin-bottom:10px}
.step p{color:var(--fg-2);font-size:15px}
@media (max-width:1024px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.steps{grid-template-columns:1fr;gap:34px}}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line);max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:flex-start;gap:18px;text-align:left;
  background:transparent;border:0;padding:22px 0;cursor:pointer;
  font-size:17.5px;font-weight:700;color:var(--fg);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-q .num{font-family:ui-monospace,Consolas,monospace;font-size:13.5px;color:var(--fg-3);padding-top:5px;flex:0 0 32px}
.faq-q .sign{margin-left:auto;flex:0 0 20px;color:var(--fg-3);font-size:20px;line-height:1.2;transition:transform .26s var(--ease),color .2s var(--ease)}
.faq-item.is-open .faq-q .sign{transform:rotate(45deg);color:var(--brand)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s var(--ease)}
.faq-item.is-open .faq-a{grid-template-rows:1fr}
.faq-a>div{overflow:hidden}
.faq-a p{color:var(--fg-2);font-size:15.8px;padding:0 48px 24px 50px}
@media (max-width:560px){.faq-a p{padding:0 8px 22px 32px}}

/* ---------- cta / form ---------- */
.cta-wrap{
  display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:44px;position:relative;overflow:hidden;
}
.cta-wrap::after{
  content:"";position:absolute;right:-80px;top:-80px;width:260px;height:260px;
  background:radial-gradient(circle,rgba(200,241,78,.16),transparent 70%);
}
.cta-wrap h2{font-size:clamp(24px,3vw,36px);margin-bottom:14px;position:relative}
.cta-wrap .cta-note{color:var(--fg-2);font-size:15.5px;position:relative}
.cta-list{margin-top:26px;display:flex;flex-direction:column;gap:12px;position:relative}
.cta-list li{display:flex;gap:10px;align-items:flex-start;color:var(--fg-2);font-size:15px}
.cta-list li::before{content:"";flex:0 0 6px;height:6px;border-radius:50%;background:var(--brand);margin-top:11px}
.form{position:relative;display:grid;gap:22px}
.field{position:relative}
.field label{
  position:absolute;left:0;top:8px;font-size:14px;color:var(--fg-3);
  transition:transform .2s var(--ease),color .2s var(--ease),font-size .2s var(--ease);
  pointer-events:none;
}
.field input,.field select,.field textarea{
  width:100%;background:transparent;border:0;border-bottom:1px solid var(--line);
  padding:14px 0 10px;font-size:16px;color:var(--fg);outline:none;
  border-radius:0;appearance:none;
  transition:border-color .2s var(--ease);
}
.field textarea{resize:vertical;min-height:76px}
.field select{cursor:pointer}
.field select option{background:var(--ink-2);color:var(--fg)}
.field input:focus,.field select:focus,.field textarea:focus{border-bottom-color:var(--brand)}
.field input:focus+label,.field select:focus+label,.field textarea:focus+label,
.field input:not(:placeholder-shown)+label,.field textarea:not(:placeholder-shown)+label,
.field.has-value label{transform:translateY(-18px);font-size:12.5px;color:var(--brand)}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-bottom-color:var(--err)}
.field .err-msg{display:none;margin-top:8px;font-family:ui-monospace,Consolas,monospace;font-size:12.5px;color:var(--err)}
.field.has-error .err-msg{display:block}
.form-foot{display:flex;flex-wrap:wrap;align-items:center;gap:16px}
.form-foot small{color:var(--fg-3);font-size:13px}
.form-success{
  display:none;align-items:center;gap:14px;
  border:1px solid rgba(95,208,138,.4);background:rgba(95,208,138,.08);
  border-radius:var(--r-btn);padding:22px;color:var(--fg);
}
.form-success.is-visible{display:flex}
.form-success .tick{
  flex:0 0 34px;width:34px;height:34px;border-radius:50%;
  background:var(--ok);color:var(--ink);display:grid;place-items:center;font-weight:900;
}
@media (max-width:900px){
  .cta-wrap{grid-template-columns:1fr;gap:32px;padding:28px}
}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-2);border-top:1px solid var(--line);margin-top:96px}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding-top:64px;padding-bottom:48px;
}
.footer-brand p{color:var(--fg-2);font-size:15px;margin-top:16px;max-width:32em}
.footer-col h4{font-size:14px;letter-spacing:.06em;color:var(--fg-3);font-weight:700;margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a,.footer-col span{color:var(--fg-2);font-size:14.5px;transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  border-top:1px solid var(--line);padding-top:22px;padding-bottom:26px;
  color:var(--fg-3);font-size:13.5px;
}
.back-top{display:inline-flex;align-items:center;gap:6px;color:var(--fg-2);font-size:13.5px}
.back-top:hover{color:var(--brand)}
@media (max-width:900px){.footer-grid{grid-template-columns:1fr 1fr;gap:30px}}
@media (max-width:520px){.footer-grid{grid-template-columns:1fr;padding-top:48px}.site-footer{margin-top:60px}}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{animation:none!important;transition-duration:.01ms!important}
}

/* roulang page: category2 */
:root{
  --ink:#0D0F0E;
  --ink-2:#141715;
  --surface:#191D1B;
  --surface-2:#1E2320;
  --line:#262B28;
  --line-2:#333936;
  --fg:#F1F4F0;
  --fg-2:#A7B0A9;
  --fg-3:#6E7772;
  --brand:#C8F14E;
  --brand-ink:#0D0F0E;
  --brand-soft:rgba(200,241,78,.14);
  --accent:#FF7A45;
  --ok:#5FD08A;
  --warn:#F0B84E;
  --err:#F0705F;
  --r-btn:6px;
  --r-card:16px;
  --r-img:12px;
  --r-badge:4px;
  --s1:4px; --s2:8px; --s3:12px; --s4:16px; --s5:24px; --s6:32px; --s7:48px; --s8:64px; --s9:96px;
  --shadow:0 12px 32px rgba(0,0,0,.35);
  --ease:cubic-bezier(.22,.61,.36,1);
  --mono:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono","Courier New",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--fg);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.2;color:var(--fg)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease),opacity .22s var(--ease)}
button{font-family:inherit;font-size:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-tight{padding:64px 0}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  min-height:46px;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.btn-primary{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}
.btn-primary:hover,.btn-primary:focus-visible{background:#d7ff63;color:var(--brand-ink);box-shadow:0 0 0 1px rgba(200,241,78,.55),0 8px 24px rgba(200,241,78,.16);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:transparent;color:var(--fg);border-color:var(--line-2)}
.btn-outline:hover,.btn-outline:focus-visible{color:var(--brand);border-color:var(--brand);transform:translateY(-1px)}
.btn-outline:active{transform:translateY(0)}
.btn-sm{padding:9px 16px;font-size:14px;min-height:40px}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;transform:none}

.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:transparent;color:var(--fg-2);
  transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease);
}
.icon-btn:hover,.icon-btn:focus-visible{color:var(--brand);border-color:var(--brand)}

.badge{
  display:inline-block;padding:3px 10px;border-radius:var(--r-badge);
  background:var(--brand-soft);color:var(--brand);
  font-size:12.5px;font-weight:600;letter-spacing:.06em;
}
.tag{
  display:inline-block;padding:3px 10px;border-radius:var(--r-badge);
  border:1px solid var(--line-2);color:var(--fg-2);
  font-size:12.5px;font-weight:500;letter-spacing:.04em;
}

/* ============ 站点头部 ============ */
.site-header{position:sticky;top:0;z-index:80;background:rgba(13,15,14,.97);border-bottom:1px solid var(--line)}
.brand-bar{border-bottom:1px solid var(--line)}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:70px;padding-top:10px;padding-bottom:10px;transition:min-height .25s var(--ease),padding .25s var(--ease)}
.site-header.is-stuck .brand-inner{min-height:58px;padding-top:6px;padding-bottom:6px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.01em}
.logo-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:8px;
  background:var(--brand);color:var(--brand-ink);
  font-family:var(--mono);font-size:18px;font-weight:700;letter-spacing:0;
}
.logo-text{font-size:18px;white-space:nowrap;color:var(--fg)}
.logo:hover .logo-text{color:var(--brand)}
.brand-actions{display:flex;align-items:center;gap:10px}

.channel-bar{background:var(--ink-2)}
.channel-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:52px}
.channels{display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.channels::-webkit-scrollbar{display:none}
.channel{
  position:relative;display:inline-flex;align-items:center;height:52px;padding:0 16px;
  font-size:15px;color:var(--fg-2);white-space:nowrap;
}
.channel::after{content:"";position:absolute;left:16px;right:16px;bottom:0;height:2px;background:transparent;transition:background-color .22s var(--ease)}
.channel:hover{color:var(--fg)}
.channel:hover::after{background:var(--line-2)}
.channel.is-active{color:var(--fg);font-weight:600}
.channel.is-active::after{background:var(--brand)}
.channel-note{font-size:12.5px;color:var(--fg-3);white-space:nowrap}
.channel-note::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--ok);margin-right:8px;vertical-align:middle}

.menu-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:transparent;color:var(--fg);
  align-items:center;justify-content:center;
}
.menu-toggle span{display:block;width:18px;height:2px;background:currentColor;position:relative}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}

.drawer{position:fixed;inset:0;z-index:120;background:rgba(10,12,11,.96);transform:translateY(-100%);transition:transform .32s var(--ease);visibility:hidden}
.drawer.is-open{transform:translateY(0);visibility:visible}
.drawer-panel{padding:20px 24px 40px;max-width:520px;margin:0 auto}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid var(--line)}
.drawer-nav{display:flex;flex-direction:column;padding-top:12px}
.drawer-nav a{padding:16px 0;border-bottom:1px solid var(--line);font-size:17px;color:var(--fg-2)}
.drawer-nav a.is-active{color:var(--brand)}
.drawer-close{width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);background:transparent;color:var(--fg);font-size:20px;line-height:1}

/* ============ 内页首屏 ============ */
.page-hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background:#111413 url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:linear-gradient(92deg,rgba(13,15,14,.97) 0%,rgba(13,15,14,.92) 46%,rgba(13,15,14,.62) 100%);
}
.hero-grid{
  position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:linear-gradient(rgba(241,244,240,.055) 1px,transparent 1px);
  background-size:100% 48px;
}
.hero-inner{position:relative;z-index:2;padding-top:64px;padding-bottom:56px;max-width:820px}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--fg-3);margin-bottom:24px}
.breadcrumb a{color:var(--fg-2)}
.breadcrumb a:hover{color:var(--brand)}
.page-hero h1{font-size:clamp(34px,5.4vw,62px);margin:20px 0 18px;letter-spacing:-.03em}
.hero-sub{font-size:clamp(17px,2vw,20px);color:var(--brand);font-weight:600;margin-bottom:20px}
.hero-lead{font-size:16.5px;color:var(--fg-2);max-width:640px;line-height:1.9}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:34px 0 30px}
.hero-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  padding-top:20px;border-top:1px solid rgba(241,244,240,.12);
  font-size:13px;color:var(--fg-3);
}
.hero-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--fg-3);display:inline-block}

/* ============ 数据条 ============ */
.stats{border-bottom:1px solid var(--line);background:var(--ink-2)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}
.stat{background:var(--ink-2);padding:34px 26px}
.stat-num{display:flex;align-items:baseline;gap:6px;font-size:clamp(30px,3.4vw,42px);font-weight:800;color:var(--brand);letter-spacing:-.02em;line-height:1.1}
.stat-num small{font-size:14px;font-weight:600;color:var(--fg-2);letter-spacing:0}
.stat-label{margin-top:10px;font-size:14px;color:var(--fg-2);line-height:1.6}

/* ============ 板块标题 ============ */
.section-head{max-width:720px;margin-bottom:52px}
.section-head h2{font-size:clamp(26px,3.4vw,40px);margin-bottom:16px}
.section-head p{color:var(--fg-2);font-size:16px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;color:var(--fg-3);margin-bottom:14px;text-transform:uppercase}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand)}

/* ============ 错落大图卡片 ============ */
.mosaic{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.mosaic-col{display:flex;flex-direction:column;gap:32px}
.mosaic-col--offset{padding-top:64px}
.m-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.m-card:hover{border-color:rgba(200,241,78,.4);transform:translateY(-2px);box-shadow:var(--shadow)}
.m-thumb{display:block;position:relative;overflow:hidden;background:var(--ink-2)}
.m-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.m-card:hover .m-thumb img{transform:scale(1.03)}
.ratio-16-10{aspect-ratio:16/10}
.ratio-4-3{aspect-ratio:4/3}
.ratio-1-1{aspect-ratio:1/1}
.m-body{padding:24px 26px 26px}
.m-body h3{font-size:19px;line-height:1.45;margin:14px 0 12px}
.m-body h3 a:hover{color:var(--brand)}
.m-body p{font-size:15.5px;color:var(--fg-2);line-height:1.85}
.m-link{display:inline-flex;align-items:center;gap:6px;margin-top:18px;font-size:14px;font-weight:600;color:var(--brand)}
.m-link span{transition:transform .22s var(--ease)}
.m-link:hover span{transform:translateX(4px)}

/* ============ 流程 ============ */
.flow-section{background:var(--ink-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.flow-list{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.flow-item{position:relative;padding-top:26px;border-top:2px solid var(--line)}
.flow-item::before{
  content:"";position:absolute;top:-6px;left:0;width:10px;height:10px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 4px rgba(200,241,78,.14);
}
.flow-idx{font-family:var(--mono);font-size:13px;color:var(--accent);letter-spacing:.1em}
.flow-item h3{font-size:18px;margin:12px 0 12px}
.flow-item p{font-size:15px;color:var(--fg-2);line-height:1.8}

/* ============ 协助通道 ============ */
.assist-list{border-top:1px solid var(--line)}
.assist-row{
  display:grid;grid-template-columns:220px 1fr;gap:32px;align-items:start;
  padding:28px 0;border-bottom:1px solid var(--line);
  transition:background-color .22s var(--ease);
}
.assist-row:hover{background:rgba(200,241,78,.03)}
.assist-row h3{font-size:18px;display:flex;align-items:center;gap:12px}
.assist-row h3 .num-tag{font-family:var(--mono);font-size:13px;color:var(--brand)}
.assist-row p{font-size:15.5px;color:var(--fg-2);max-width:720px}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:border-color .22s var(--ease)}
.faq-item:hover{border-color:var(--line-2)}
.faq-item[open]{border-color:rgba(200,241,78,.35)}
.faq-item summary{
  display:flex;align-items:center;gap:16px;padding:20px 22px;
  cursor:pointer;list-style:none;font-size:17px;font-weight:600;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-idx{font-family:var(--mono);font-size:13px;color:var(--brand);flex:none;letter-spacing:.06em}
.faq-icon{margin-left:auto;flex:none;width:18px;height:18px;position:relative;transition:transform .25s var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--fg-2);border-radius:1px}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-item[open] .faq-icon{transform:rotate(135deg)}
.faq-item[open] .faq-icon::before,.faq-item[open] .faq-icon::after{background:var(--brand)}
.faq-body{padding:0 22px 24px 58px;color:var(--fg-2);font-size:15.5px;line-height:1.9}

/* ============ 表单 CTA ============ */
.cta-section{background:var(--ink-2);border-top:1px solid var(--line)}
.cta-wrap{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.cta-copy h2{font-size:clamp(26px,3.4vw,38px);margin-bottom:18px}
.cta-copy p{color:var(--fg-2);font-size:16px}
.cta-points{margin-top:28px;display:flex;flex-direction:column;gap:14px}
.cta-points li{display:flex;gap:12px;font-size:15px;color:var(--fg-2);align-items:flex-start}
.cta-points li::before{content:"";flex:none;width:6px;height:6px;border-radius:50%;background:var(--brand);margin-top:11px}

.assist-form{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:32px}
.field{position:relative;margin-bottom:26px}
.field label{display:block;font-size:13px;color:var(--fg-3);margin-bottom:8px;letter-spacing:.04em}
.field input,.field select,.field textarea{
  width:100%;background:transparent;border:0;border-bottom:1px solid var(--line-2);
  padding:9px 0;font-size:16px;color:var(--fg);border-radius:0;
  transition:border-color .22s var(--ease);
}
.field textarea{resize:vertical;min-height:76px;line-height:1.7}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--fg-3) 50%),linear-gradient(135deg,var(--fg-3) 50%,transparent 50%);background-position:calc(100% - 14px) 20px,calc(100% - 8px) 20px;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.field select option{background:var(--surface);color:var(--fg)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-bottom-color:var(--brand)}
.field input::placeholder,.field textarea::placeholder{color:var(--fg-3)}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-bottom-color:var(--err)}
.field-error{display:none;margin-top:8px;font-family:var(--mono);font-size:12.5px;color:var(--err)}
.field.has-error .field-error{display:block}
.form-note{font-size:13px;color:var(--fg-3);margin-top:6px;line-height:1.7}
.form-success{display:none;text-align:center;padding:34px 10px}
.form-success.is-visible{display:block}
.success-mark{
  width:56px;height:56px;border-radius:50%;margin:0 auto 18px;
  background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:26px;
}
.form-success h3{font-size:20px;margin-bottom:10px}
.form-success p{color:var(--fg-2);font-size:15px}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);border-top:1px solid var(--line);padding-top:72px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px;padding-bottom:56px}
.footer-brand p{margin-top:18px;color:var(--fg-2);font-size:15px;max-width:340px;line-height:1.9}
.footer-col h4{font-size:14px;letter-spacing:.14em;color:var(--fg-3);font-weight:600;margin-bottom:20px}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col li{font-size:15px;color:var(--fg-2)}
.footer-col a{color:var(--fg-2)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding-top:24px;padding-bottom:32px;
  font-size:13.5px;color:var(--fg-3);
}
.back-top{display:inline-flex;align-items:center;gap:6px;color:var(--fg-2);font-size:13.5px}
.back-top:hover{color:var(--brand)}
.back-top span{transition:transform .22s var(--ease)}
.back-top:hover span{transform:translateY(-3px)}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease);transition-delay:calc(var(--i,0) * 80ms)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none!important;transition-duration:.01ms!important}
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .section{padding:72px 0}
  .section-tight{padding:52px 0}
  .brand-actions .btn-outline{display:none}
  .mosaic{gap:24px}
  .mosaic-col{gap:24px}
  .flow-list{grid-template-columns:repeat(2,1fr);gap:32px}
  .cta-wrap{grid-template-columns:1fr;gap:44px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media (max-width:768px){
  body{font-size:16px}
  .container{padding:0 18px}
  .section{padding:56px 0}
  .section-tight{padding:40px 0}
  .menu-toggle{display:inline-flex}
  .channels{order:1}
  .channel-inner{min-height:48px;gap:0}
  .channel{height:48px;padding:0 13px;font-size:14.5px}
  .channel::after{left:13px;right:13px}
  .channel-note{display:none}
  .brand-actions .btn{display:none}
  .brand-actions .icon-btn{display:none}
  .hero-inner{padding-top:44px;padding-bottom:40px}
  .page-hero h1{font-size:clamp(30px,8vw,40px)}
  .stats-grid{grid-template-columns:1fr 1fr}
  .stat{padding:24px 18px}
  .mosaic{grid-template-columns:1fr;gap:24px}
  .mosaic-col--offset{padding-top:0}
  .flow-list{grid-template-columns:1fr;gap:26px}
  .assist-row{grid-template-columns:1fr;gap:12px}
  .faq-body{padding-left:22px}
  .assist-form{padding:24px 20px}
  .footer-grid{grid-template-columns:1fr;gap:34px;padding-bottom:40px}
  .footer-brand p{max-width:none}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px}
}
@media (max-width:520px){
  .logo-text{font-size:16px}
  .stat-num{font-size:30px}
  .m-body{padding:20px 18px 22px}
  .hero-actions .btn{width:100%}
  .faq-item summary{font-size:15.5px;padding:18px 16px;gap:12px}
  .faq-body{padding:0 16px 20px 16px;font-size:15px}
}