/* roulang page: index */
/* ============ 设计令牌 ============ */
:root{
  --bg:#0B0E13;
  --bg-alt:#12161F;
  --surface:#171C27;
  --surface-hi:#1E2431;
  --footer-bg:#08090D;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --primary:#BEE94B;
  --primary-hover:#D2F86A;
  --primary-down:#A5CC35;
  --secondary:#3FE0D0;
  --accent:#FF7A59;
  --text:#F2F5F8;
  --body:#C9D1DC;
  --muted:#8C97A8;
  --disabled:#5A6474;
  --ink:#0B0E13;
  --radius-card:16px;
  --radius-img:12px;
  --radius-input:12px;
  --radius-btn:10px;
  --container:1200px;
  --glow:0 0 24px rgba(190,233,75,.18);
  --shadow-card:inset 0 0 0 1px var(--line);
  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}

/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--body);
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,figure,ul,ol,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
a,button,input,select,textarea{-webkit-tap-highlight-color:transparent;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(190,233,75,.28);color:var(--text);}
h1,h2,h3,h4{color:var(--text);line-height:1.3;font-weight:700;}
h1{font-size:clamp(30px,4.4vw,52px);font-weight:800;line-height:1.25;}
h2{font-size:clamp(24px,3vw,34px);font-weight:700;}
h3{font-size:20px;font-weight:600;}
p{font-size:16.5px;line-height:1.85;color:var(--body);}
strong{color:var(--text);font-weight:700;}

/* ============ 容器与区块 ============ */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.container--narrow{max-width:760px;}
main{display:block;}
.section{padding:104px 0;}
.section--alt{background:var(--bg-alt);}
.section--tight{padding:72px 0;}
.section-head{max-width:720px;margin-bottom:48px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:500;letter-spacing:.14em;
  color:var(--primary);text-transform:uppercase;margin-bottom:16px;
}
.section-head .eyebrow::before{content:"";width:18px;height:1.5px;background:var(--primary);display:inline-block;}
.section-head h2{margin:0 0 16px;}
.section-head p{color:var(--muted);font-size:16px;max-width:660px;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;min-height:48px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:500;letter-spacing:.02em;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .2s ease,border-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn--primary{background:var(--primary);color:var(--ink);font-weight:700;}
.btn--primary:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:var(--glow);}
.btn--primary:active{background:var(--primary-down);transform:translateY(0);}
.btn--ghost{background:transparent;color:var(--text);border-color:var(--line-strong);}
.btn--ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);}
.btn--ghost:active{border-color:var(--primary-down);color:var(--primary-down);}
.btn--text{background:none;border:0;padding:6px 0;min-height:auto;color:var(--primary);font-weight:500;border-bottom:1px solid rgba(190,233,75,.4);border-radius:0;}
.btn--text:hover{color:var(--primary-hover);border-bottom-color:var(--primary-hover);}
.btn[disabled],.btn.is-disabled{background:#2A303C;color:var(--disabled);border-color:transparent;cursor:not-allowed;transform:none;box-shadow:none;}

/* ============ 标签 / 胶囊 ============ */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12.5px;font-weight:500;line-height:1.6;
  background:rgba(190,233,75,.12);color:var(--primary);
  border:1px solid rgba(190,233,75,.28);
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.tag:hover{background:rgba(190,233,75,.2);color:var(--primary-hover);}
.tag--muted{background:rgba(255,255,255,.05);color:var(--muted);border-color:var(--line);}
.tag--accent{background:rgba(255,122,89,.12);color:var(--accent);border-color:rgba(255,122,89,.3);}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  height:68px;
  background:rgba(11,14,19,.72);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{
  height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;min-width:0;}
.brand__mark{
  width:10px;height:10px;border-radius:3px;background:var(--primary);
  box-shadow:0 0 12px rgba(190,233,75,.5);flex:none;
}
.brand__text{display:flex;flex-direction:column;line-height:1.2;}
.brand__main{font-size:15px;font-weight:700;color:var(--text);letter-spacing:.02em;white-space:nowrap;}
.brand__sub{font-size:11.5px;color:var(--muted);letter-spacing:.16em;text-transform:uppercase;}
.nav__links{display:flex;align-items:center;gap:34px;}
.nav__link{
  position:relative;font-size:14px;font-weight:500;color:#A9B3C0;
  padding:4px 0;transition:color .2s ease;white-space:nowrap;
}
.nav__link:hover{color:var(--text);}
.nav__link.is-active{color:var(--text);}
.nav__link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--primary);border-radius:2px;
}
.nav__right{display:flex;align-items:center;gap:14px;}
.nav__cta{padding:9px 18px;min-height:40px;font-size:13.5px;}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line-strong);
  background:transparent;border-radius:8px;cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:16px;height:1.5px;background:var(--text);transition:transform .2s ease,opacity .2s ease;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(3.25px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){transform:translateY(-3.25px) rotate(-45deg);}
.nav-drawer{
  display:none;position:fixed;top:56px;left:0;right:0;bottom:0;z-index:55;
  background:var(--bg);padding:20px 24px 32px;
  border-top:1px solid var(--line);overflow-y:auto;
}
.nav-drawer.is-open{display:block;}
.nav-drawer__link{
  display:block;font-size:16px;font-weight:500;color:var(--text);
  padding:18px 2px;border-bottom:1px solid var(--line);
}
.nav-drawer__link.is-active{color:var(--primary);}
.nav-drawer__cta{margin-top:26px;width:100%;}

/* ============ Hero ============ */
.hero{padding:150px 0 96px;position:relative;overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(900px 420px at 12% -10%,rgba(190,233,75,.10),transparent 62%),
    radial-gradient(700px 380px at 92% 8%,rgba(63,224,208,.07),transparent 60%);
  pointer-events:none;
}
.hero__grid{
  position:relative;display:grid;grid-template-columns:1.05fr .95fr;
  gap:64px;align-items:center;min-height:calc(78vh - 68px);
}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;color:var(--muted);letter-spacing:.1em;margin-bottom:22px;
}
.hero__eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--primary);display:block;}
.hero h1{margin-bottom:22px;max-width:620px;}
.hero h1 em{font-style:normal;color:var(--primary);}
.hero__sub{font-size:17px;color:var(--body);max-width:520px;margin-bottom:34px;}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:40px;}
.hero__trust{
  display:flex;flex-wrap:wrap;align-items:center;gap:18px;
  padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.hero__trust span{display:inline-flex;align-items:center;gap:8px;}
.hero__trust span::before{content:"";width:5px;height:5px;background:var(--primary);border-radius:1px;display:block;}
.hero__visual{position:relative;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);}
.hero__visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  filter:saturate(.85) contrast(1.05);
}
.hero__visual::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(11,14,19,.35),rgba(11,14,19,.85)),
    radial-gradient(circle at 1px 1px,rgba(255,255,255,.14) 1px,transparent 0);
  background-size:auto,14px 14px;
}
.hero__floating{
  position:absolute;left:24px;bottom:24px;right:24px;z-index:2;
  background:var(--surface);border:1px solid var(--line-strong);
  border-radius:var(--radius-img);padding:18px 20px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  box-shadow:0 12px 32px rgba(0,0,0,.35);
}
.hero__floating .fl-label{font-size:12.5px;color:var(--muted);letter-spacing:.06em;}
.hero__floating .fl-value{
  font-size:30px;font-weight:800;color:var(--primary);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.hero__floating .fl-trend{font-size:13px;color:var(--secondary);white-space:nowrap;}

/* ============ KPI ============ */
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.kpi-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:26px 24px;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.kpi-card:hover{border-color:rgba(190,233,75,.3);transform:translateY(-2px);box-shadow:var(--glow);}
.kpi-card__name{font-size:13px;color:var(--muted);letter-spacing:.06em;margin-bottom:14px;}
.kpi-card__value{
  font-size:clamp(32px,5vw,44px);font-weight:800;color:var(--primary);
  font-variant-numeric:tabular-nums;line-height:1.1;display:flex;align-items:baseline;gap:6px;
}
.kpi-card__value small{font-size:14px;font-weight:500;color:var(--muted);}
.kpi-card__foot{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:16px;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.up{color:var(--primary);font-variant-numeric:tabular-nums;}
.down{color:var(--accent);font-variant-numeric:tabular-nums;}

/* ============ Bento 服务矩阵 ============ */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.bento-card{
  position:relative;
  grid-column:span 4;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:28px 26px 24px 30px;
  display:flex;flex-direction:column;
  transition:transform .2s ease,border-color .2s ease,background-color .2s ease,box-shadow .2s ease;
  overflow:hidden;
}
.bento-card::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:2px;
  background:var(--primary);border-radius:2px;opacity:.9;
}
.bento-card:hover{transform:translateY(-2px);border-color:rgba(190,233,75,.3);background:var(--surface-hi);box-shadow:var(--glow);}
.bento-card--wide{grid-column:span 7;}
.bento-card--slim{grid-column:span 5;}
.bento-card__num{
  font-size:12.5px;font-weight:700;letter-spacing:.18em;color:var(--primary);
  font-variant-numeric:tabular-nums;margin-bottom:18px;
}
.bento-card__icon{
  width:34px;height:34px;margin-bottom:18px;
  border:1.5px solid var(--line-strong);border-radius:9px;
  display:flex;align-items:center;justify-content:center;color:var(--primary);
  font-size:15px;
}
.bento-card h3{margin-bottom:12px;font-size:19px;}
.bento-card p{font-size:15px;color:var(--muted);line-height:1.8;}
.bento-card__media{
  margin-top:22px;border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line);
}
.bento-card__media img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.bento-card__foot{
  margin-top:auto;padding-top:20px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:14px;color:var(--muted);
}
.bento-card__foot a{color:var(--primary);display:inline-flex;align-items:center;gap:6px;transition:gap .2s ease,color .2s ease;}
.bento-card__foot a:hover{gap:10px;color:var(--primary-hover);}

/* ============ 对比 ============ */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;}
.compare__col{padding:28px 26px;}
.compare__col + .compare__col{border-left:1px solid var(--line);}
.compare__title{
  font-size:13px;letter-spacing:.12em;color:var(--muted);margin-bottom:22px;
  display:flex;align-items:center;justify-content:space-between;
}
.compare__title b{color:var(--text);font-size:15px;letter-spacing:0;}
.compare__row{margin-bottom:20px;}
.compare__row:last-child{margin-bottom:0;}
.compare__label{font-size:14px;color:var(--body);display:flex;justify-content:space-between;margin-bottom:8px;}
.compare__label em{font-style:normal;font-variant-numeric:tabular-nums;color:var(--muted);}
.bar{height:8px;border-radius:999px;background:rgba(255,255,255,.06);overflow:hidden;}
.bar span{display:block;height:100%;border-radius:999px;background:rgba(255,255,255,.22);}
.compare__col--ours .bar span{background:var(--primary);}
.compare__col--ours .compare__label em{color:var(--primary);}
.compare-note{font-size:13px;color:var(--muted);margin-top:18px;line-height:1.75;}

/* ============ 最新信息 ============ */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.news-card:hover{transform:translateY(-2px);border-color:rgba(190,233,75,.3);box-shadow:var(--glow);}
.news-card--featured{grid-column:span 2;}
.news-card--featured .news-card__media img{aspect-ratio:16/7;}
.news-card__media{position:relative;overflow:hidden;background:linear-gradient(140deg,#12161F,#1E2431);}
.news-card__media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease;}
.news-card:hover .news-card__media img{transform:scale(1.03);}
.news-card__media .tag{position:absolute;top:14px;left:14px;background:rgba(11,14,19,.82);border-color:rgba(190,233,75,.35);backdrop-filter:blur(4px);}
.news-card__body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1;}
.news-card__title{
  font-size:17.5px;font-weight:700;color:var(--text);line-height:1.55;margin-bottom:12px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card--featured .news-card__title{font-size:21px;}
.news-card__excerpt{
  font-size:14.5px;color:var(--muted);line-height:1.85;margin-bottom:20px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__meta{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--muted);
}
.news-card__meta .arrow{color:var(--primary);transition:transform .2s ease;}
.news-card:hover .news-card__meta .arrow{transform:translateX(3px);}
.news-empty{
  grid-column:1/-1;border:1px dashed var(--line-strong);border-radius:var(--radius-card);
  padding:56px 24px;text-align:center;background:rgba(255,255,255,.015);
}
.news-empty__icon{
  width:40px;height:40px;margin:0 auto 18px;border:1.5px solid var(--line-strong);
  border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--muted);
}
.news-empty p{color:var(--muted);font-size:15px;margin-bottom:20px;}

/* ============ FAQ ============ */
.faq-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:64px;align-items:start;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);transition:background-color .2s ease;}
.faq-item[open]{background:var(--bg-alt);border-left:2px solid var(--primary);padding-left:20px;}
.faq-item summary{
  list-style:none;cursor:pointer;padding:22px 4px;
  display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  font-size:16px;font-weight:500;color:var(--text);line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-icon{position:relative;width:16px;height:16px;flex:none;margin-top:6px;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--primary);border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}
.faq-icon::before{left:0;top:7.25px;width:16px;height:1.5px;}
.faq-icon::after{top:0;left:7.25px;width:1.5px;height:16px;}
.faq-item[open] .faq-icon::after{transform:rotate(90deg);opacity:0;}
.faq-item p{padding:0 44px 24px 4px;font-size:15px;color:var(--muted);line-height:1.9;}

/* ============ 表单 CTA ============ */
.cta-band{
  position:relative;background:var(--bg-alt);border-top:2px solid var(--primary);
  border-radius:0 0 var(--radius-card) var(--radius-card);overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.16;
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
}
.cta-band > *{position:relative;z-index:1;}
.cta-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:64px;align-items:start;}
.cta-points{margin-top:28px;border-top:1px solid var(--line);}
.cta-points li{
  padding:16px 0 16px 26px;border-bottom:1px solid var(--line);
  font-size:15px;color:var(--body);position:relative;
}
.cta-points li::before{
  content:"";position:absolute;left:0;top:24px;width:8px;height:8px;
  border-radius:2px;background:var(--primary);
}
.form-card{
  background:rgba(23,28,39,.9);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:32px;
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13.5px;color:var(--muted);margin-bottom:8px;}
.field label .req{color:var(--accent);margin-left:4px;}
.field input,.field select,.field textarea{
  width:100%;background:var(--bg);border:1px solid var(--line-strong);
  border-radius:var(--radius-input);padding:13px 14px;min-height:48px;
  font-size:15px;color:var(--text);transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{min-height:110px;resize:vertical;line-height:1.8;}
.field input::placeholder,.field textarea::placeholder{color:var(--disabled);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(190,233,75,.25);
}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;background-size:6px 6px,6px 6px;background-repeat:no-repeat;}
.form-privacy{font-size:13px;color:var(--muted);margin-top:16px;line-height:1.75;}
.form-alert{
  display:none;margin-top:16px;padding:12px 16px;border-radius:var(--radius-input);
  font-size:14px;border:1px solid rgba(190,233,75,.4);background:rgba(190,233,75,.08);color:var(--primary);
}
.form-alert.is-visible{display:block;}

/* ============ 页脚 ============ */
.site-footer{background:var(--footer-bg);border-top:1px solid var(--line);padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:56px;}
.footer-brand__logo{display:flex;align-items:center;gap:10px;margin-bottom:18px;}
.footer-brand__logo .brand__mark{width:10px;height:10px;}
.footer-brand__logo strong{font-size:16px;color:var(--text);font-weight:700;}
.footer-brand p{font-size:14px;color:var(--muted);line-height:1.85;max-width:320px;}
.footer-col h4{font-size:14px;color:var(--text);margin-bottom:20px;letter-spacing:.04em;}
.footer-col li{margin-bottom:12px;}
.footer-col a{font-size:14px;color:var(--muted);transition:color .2s ease;}
.footer-col a:hover{color:var(--primary);}
.footer-meta{font-size:14px;color:var(--muted);line-height:1.9;}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:var(--disabled);
}
.footer-bottom a{color:var(--muted);transition:color .2s ease;}
.footer-bottom a:hover{color:var(--primary);}
.footer-bottom .sep{margin:0 10px;color:var(--disabled);}

/* ============ 提示条 ============ */
.notice{
  border:1px solid var(--line-strong);border-radius:var(--radius-input);
  padding:14px 18px;font-size:14px;color:var(--body);
  display:flex;align-items:flex-start;gap:12px;background:var(--surface);
}
.notice--warn{border-color:rgba(255,122,89,.4);background:rgba(255,122,89,.06);color:#F4C4B7;}
.notice--warn i{color:var(--accent);}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .container{padding:0 22px;}
  .hero__grid{gap:48px;}
  .bento-card{grid-column:span 6;}
  .bento-card--wide,.bento-card--slim{grid-column:span 6;}
}
@media (max-width:1024px){
  .nav__links{display:none;}
  .nav-toggle{display:flex;}
  .nav__right .btn{display:none;}
  .section{padding:76px 0;}
  .hero{padding:118px 0 72px;}
  .hero__grid{grid-template-columns:1fr;min-height:auto;}
  .hero__visual{order:-1;margin-bottom:8px;}
  .hero__visual img{aspect-ratio:16/9;}
  .kpi-grid{grid-template-columns:repeat(2,1fr);}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .news-card--featured{grid-column:span 2;}
  .faq-wrap,.cta-grid{grid-template-columns:1fr;gap:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .section{padding:64px 0;}
  .section-head{margin-bottom:32px;}
  .hero{padding:96px 0 56px;}
  .hero__sub{font-size:16px;}
  .hero__actions{gap:12px;}
  .hero__actions .btn{flex:1 1 auto;}
  .compare{grid-template-columns:1fr;}
  .compare__col + .compare__col{border-left:0;border-top:1px solid var(--line);}
  .bento{grid-template-columns:1fr;}
  .bento-card,.bento-card--wide,.bento-card--slim{grid-column:span 1;}
  .news-grid{grid-template-columns:1fr;}
  .news-card--featured{grid-column:span 1;}
  .news-card--featured .news-card__media img{aspect-ratio:16/9;}
  .footer-grid{grid-template-columns:1fr;gap:34px;}
  .form-row{grid-template-columns:1fr;}
  .form-card{padding:24px;}
}
@media (max-width:520px){
  h1{font-size:30px;}
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .kpi-grid{grid-template-columns:repeat(2,1fr);gap:16px;}
  .kpi-card{padding:20px 18px;}
  .hero__trust{gap:12px 16px;}
  .btn{width:100%;}
  .hero__actions{flex-direction:column;}
  .nav__cta{width:auto;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: article */
:root{
  --bg:#0B0E13;
  --bg-alt:#12161F;
  --surface:#171C27;
  --surface-hi:#1E2431;
  --footer-bg:#08090D;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#BEE94B;
  --brand-hover:#D2F86A;
  --brand-down:#A5CC35;
  --accent:#3FE0D0;
  --coral:#FF7A59;
  --t1:#F2F5F8;
  --t2:#C9D1DC;
  --t3:#8C97A8;
  --t4:#5A6474;
  --r-card:16px;
  --r-img:12px;
  --r-input:12px;
  --r-btn:10px;
  --r-pill:999px;
  --container:1200px;
  --read:760px;
  --gap:24px;
  --sec-desktop:104px;
  --sec-tablet:72px;
  --sec-mobile:56px;
  --shadow-glow:0 0 24px rgba(190,233,75,.18);
  --font:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--t2);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  padding-top:68px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);object-fit:cover}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;border-radius:4px
}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--t1);line-height:1.3;font-weight:700}
p{margin:0 0 1.1em}
ul,ol{margin:0;padding:0;list-style:none}
input,select,textarea{font-family:inherit;font-size:15px}
::selection{background:rgba(190,233,75,.28);color:var(--t1)}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.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}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;height:68px;
  background:rgba(11,14,19,.72);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background-color .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{background:rgba(8,9,13,.9);border-bottom-color:var(--line-strong)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px;gap:24px}
.brand{display:flex;align-items:center;gap:10px}
.brand__mark{
  width:10px;height:10px;border-radius:3px;flex:0 0 auto;
  background:var(--brand);
  box-shadow:0 0 0 4px rgba(190,233,75,.12);
}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__main{font-size:16px;font-weight:800;color:var(--t1);letter-spacing:.02em}
.brand__sub{font-size:11px;color:var(--t3);letter-spacing:.16em;text-transform:uppercase}
.nav__links{display:flex;align-items:center;gap:34px}
.nav__link{
  position:relative;font-size:14px;font-weight:500;color:#A9B3C0;padding:4px 0;
}
.nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav__link:hover{color:var(--t1)}
.nav__link:hover::after{transform:scaleX(1)}
.nav__link.is-active{color:var(--t1)}
.nav__link.is-active::after{transform:scaleX(1)}
.nav__right{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--line-strong);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:16px;height:1.5px;background:var(--t1);transition:transform .22s ease,opacity .22s ease}
.nav-toggle[aria-expanded="true"] span:first-child{transform:translateY(3.25px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:last-child{transform:translateY(-3.25px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:0 20px;height:42px;border-radius:var(--r-btn);
  font-size:14px;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;transition:all .2s ease;white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#0B0E13;border-color:var(--brand)}
.btn--primary:hover{background:var(--brand-hover);border-color:var(--brand-hover);box-shadow:var(--shadow-glow)}
.btn--primary:active{background:var(--brand-down);border-color:var(--brand-down);box-shadow:none}
.btn--ghost{background:transparent;color:var(--t1);border-color:var(--line-strong)}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand);box-shadow:var(--shadow-glow)}
.btn--ghost:active{border-color:var(--brand-down);color:var(--brand-down)}
.btn--text{height:auto;padding:0;background:none;color:var(--brand);border:0;text-decoration:underline;text-underline-offset:3px}
.btn--text:hover{color:var(--brand-hover)}
.btn--block{width:100%}

/* ---------- breadcrumb & page head ---------- */
.page-head{
  position:relative;
  padding:44px 0 40px;
  border-bottom:1px solid var(--line);
  background:
    linear-gradient(180deg,rgba(11,14,19,.92) 0%,rgba(11,14,19,.96) 100%),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:22px 22px;opacity:.55;
}
.page-head .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--t3);margin-bottom:20px}
.breadcrumb a{color:var(--t3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--t4)}
.breadcrumb .current{color:var(--t2);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cat-kicker{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:var(--r-pill);
  border:1px solid rgba(190,233,75,.35);background:rgba(190,233,75,.08);
  color:var(--brand);font-size:13px;font-weight:600;margin-bottom:18px;
}
.cat-kicker::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand)}
.article-title{
  font-size:clamp(26px,3.4vw,38px);
  line-height:1.35;
  font-weight:800;
  max-width:860px;
  letter-spacing:.01em;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:20px;font-size:13.5px;color:var(--t3);
}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--t4)}

/* ---------- article layout ---------- */
.section{padding:var(--sec-desktop) 0}
.article-main{padding:56px 0 0}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start}
.article-article{max-width:var(--read)}
.article-body{font-size:17px;line-height:1.9;color:var(--t2);min-height:320px}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  position:relative;font-size:24px;font-weight:700;color:var(--t1);
  margin:48px 0 16px;padding-left:16px;line-height:1.4;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.36em;width:3px;height:1em;border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:19px;font-weight:600;color:var(--t1);margin:32px 0 12px}
.article-body h4{font-size:17px;font-weight:600;color:var(--t1);margin:24px 0 10px}
.article-body ul,.article-body ol{padding-left:1.3em;margin:0 0 1.2em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:.45em 0;line-height:1.8}
.article-body ul li::marker{color:var(--brand)}
.article-body ol li::marker{color:var(--brand);font-variant-numeric:tabular-nums}
.article-body blockquote{
  margin:24px 0;padding:20px 22px;border-left:3px solid var(--brand);
  background:var(--bg-alt);border-radius:0 var(--r-img) var(--r-img) 0;color:var(--t2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{width:100%;height:auto;border-radius:var(--r-img);margin:24px 0}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--t3);text-align:center;margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden}
.article-body th{background:var(--surface);color:var(--t1);text-align:left;padding:12px 16px;font-weight:600;border-bottom:1px solid var(--line)}
.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);color:var(--t2)}
.article-body tr:last-child td{border-bottom:0}
.article-body th:last-child,.article-body td:last-child{text-align:right;font-variant-numeric:tabular-nums}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--brand-hover)}
.article-body strong{color:var(--t1);font-weight:600}
.article-body code{background:var(--surface);padding:2px 6px;border-radius:6px;font-size:14px;color:var(--accent)}
.article-note{
  margin-top:44px;padding:16px 18px;border:1px solid var(--line);border-radius:var(--r-img);
  font-size:13px;line-height:1.8;color:var(--t3);background:var(--bg-alt);
}
.article-note strong{color:var(--t2)}

/* ---------- aside / toc ---------- */
.article-aside{position:sticky;top:92px}
.toc-toggle{
  display:none;width:100%;align-items:center;justify-content:space-between;
  padding:14px 16px;border:1px solid var(--line-strong);border-radius:var(--r-input);
  background:var(--surface);color:var(--t1);font-size:15px;font-weight:600;
}
.toc-toggle .chev{width:8px;height:8px;border-right:1.5px solid var(--brand);border-bottom:1.5px solid var(--brand);transform:rotate(45deg);transition:transform .2s ease}
.toc-toggle[aria-expanded="true"] .chev{transform:rotate(-135deg)}
.toc-block{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;margin-bottom:20px;
}
.toc-title{
  font-size:13px;font-weight:700;color:var(--t3);letter-spacing:.14em;
  text-transform:uppercase;margin-bottom:14px;
}
.toc-list li+li{border-top:1px solid var(--line)}
.toc-list a{display:block;padding:10px 0;font-size:14.5px;color:var(--t2)}
.toc-list a:hover{color:var(--brand);padding-left:4px}
.toc-rank li+li{border-top:1px solid var(--line)}
.toc-rank a{display:flex;gap:10px;align-items:flex-start;padding:11px 0;font-size:14px;color:var(--t2);line-height:1.65}
.toc-rank a:hover{color:var(--brand)}
.toc-rank .num{
  flex:0 0 auto;font-size:12px;font-weight:700;color:var(--brand);
  font-variant-numeric:tabular-nums;padding-top:2px;
}
.toc-cta{background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--r-card);padding:22px}
.toc-cta p{font-size:14px;color:var(--t3);margin-bottom:14px}

/* ---------- empty state ---------- */
.empty-state{
  border:1px dashed var(--line-strong);border-radius:var(--r-card);
  background:var(--bg-alt);padding:56px 28px;text-align:center;
}
.empty-state__icon{
  width:44px;height:44px;margin:0 auto 18px;border-radius:12px;
  border:1px solid var(--line-strong);position:relative;
}
.empty-state__icon::before,.empty-state__icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--t4);transform:translate(-50%,-50%);
}
.empty-state__icon::before{width:16px;height:1.5px}
.empty-state__icon::after{width:1.5px;height:16px}
.empty-state h2{font-size:20px;margin-bottom:10px}
.empty-state p{color:var(--t3);font-size:14.5px;margin-bottom:20px}

/* ---------- prev next ---------- */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:44px}
.post-nav a{
  display:flex;flex-direction:column;gap:6px;padding:18px 20px;
  border:1px solid var(--line);border-radius:var(--r-img);background:var(--surface);
  transition:all .2s ease;
}
.post-nav a:hover{border-color:rgba(190,233,75,.3);transform:translateY(-2px)}
.post-nav .label{font-size:12.5px;color:var(--t3);letter-spacing:.1em}
.post-nav .ttl{font-size:15px;color:var(--t1);font-weight:600}
.post-nav .next{align-items:flex-end;text-align:right}

/* ---------- back links ---------- */
.back-links{display:flex;flex-wrap:wrap;gap:24px;margin-top:40px;padding-top:28px;border-top:1px solid var(--line)}
.back-links a{color:var(--brand);font-size:15px;text-decoration:underline;text-underline-offset:4px}
.back-links a:hover{color:var(--brand-hover)}

/* ---------- related ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,3vw,34px);line-height:1.3}
.section-head .sub{font-size:14.5px;color:var(--t3);margin-top:10px;max-width:640px}
.section-head .more{font-size:14px;font-weight:600;color:var(--brand);white-space:nowrap}
.section-head .more:hover{color:var(--brand-hover)}
.section--alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
.post-card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.post-card:hover{transform:translateY(-2px);border-color:rgba(190,233,75,.3);box-shadow:var(--shadow-glow)}
.post-card__media{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(140deg,#1E2431,#0B0E13)}
.post-card__media img{width:100%;height:100%;object-fit:cover;border-radius:0}
.post-card__tag{
  position:absolute;top:12px;left:12px;
  padding:4px 12px;border-radius:var(--r-pill);
  background:rgba(11,14,19,.78);border:1px solid rgba(190,233,75,.35);
  color:var(--brand);font-size:12px;font-weight:600;
}
.post-card__body{padding:22px;display:flex;flex-direction:column;flex:1}
.post-card__body h3{font-size:17px;line-height:1.55;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card__body p{font-size:14px;color:var(--t3);line-height:1.8;margin-bottom:18px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-card__meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--t3);
}
.post-card__meta .arrow{color:var(--brand);font-weight:600}
.post-card__meta .arrow::after{content:"→";margin-left:6px}

/* ---------- cta bar ---------- */
.cta-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  padding:28px 32px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--bg-alt);border-top:2px solid var(--brand);
}
.cta-bar h2{font-size:22px;margin-bottom:8px}
.cta-bar p{font-size:14.5px;color:var(--t3);margin:0}

/* ---------- footer ---------- */
.site-footer{background:var(--footer-bg);border-top:1px solid var(--line);padding:72px 0 0;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:48px}
.footer-brand__logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand__logo strong{font-size:16px;color:var(--t1);font-weight:800}
.footer-brand p{font-size:14px;color:var(--t3);line-height:1.85;max-width:320px;margin:0}
.footer-col h4{font-size:14px;color:var(--t1);letter-spacing:.06em;margin-bottom:18px;font-weight:700}
.footer-col ul li{margin-bottom:12px}
.footer-col ul a{font-size:14px;color:var(--t3)}
.footer-col ul a:hover{color:var(--brand)}
.footer-meta p{font-size:14px;color:var(--t3);margin:0 0 10px;line-height:1.8}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--t4);
}
.footer-bottom a{color:var(--t4)}
.footer-bottom a:hover{color:var(--brand)}
.footer-bottom .sep{margin:0 8px;color:var(--t4)}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .container{padding:0 22px}
  .article-layout{grid-template-columns:minmax(0,1fr) 280px;gap:44px}
}
@media (max-width:1024px){
  .article-layout{grid-template-columns:1fr;gap:32px}
  .article-aside{position:static;order:-1}
  .toc-toggle{display:flex}
  .toc-body{display:none;margin-top:16px}
  .toc-body.is-open{display:block}
  .article-article{max-width:none}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:72px 0}
  .article-main{padding:40px 0 0}
}
@media (max-width:768px){
  body{padding-top:56px}
  .site-header,.nav{height:56px}
  .nav-toggle{display:flex}
  .nav__cta{display:none}
  .nav__links{
    position:fixed;top:56px;left:0;right:0;z-index:99;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--bg-alt);border-bottom:1px solid var(--line-strong);
    padding:8px 24px 24px;max-height:calc(100vh - 56px);overflow-y:auto;
    transform:translateY(-12px);opacity:0;visibility:hidden;transition:all .22s ease;
  }
  .nav__links.is-open{transform:translateY(0);opacity:1;visibility:visible}
  .nav__link{padding:16px 0;font-size:16px;border-bottom:1px solid var(--line)}
  .nav__link::after{display:none}
  .nav__link.is-active{color:var(--brand)}
  .nav__links .btn{margin-top:20px}
  .page-head{padding:32px 0 30px}
  .article-title{font-size:clamp(24px,6vw,30px)}
  .article-body{font-size:16.5px}
  .article-body h2{font-size:21px;margin-top:38px}
  .article-body h3{font-size:18px}
  .article-body table{font-size:14px;display:block;overflow-x:auto;white-space:nowrap}
  .card-grid{grid-template-columns:1fr}
  .post-nav{grid-template-columns:1fr}
  .post-nav .next{align-items:flex-start;text-align:left}
  .section{padding:56px 0}
  .cta-bar{padding:24px;flex-direction:column;align-items:flex-start}
  .cta-bar .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .site-footer{padding-top:56px;margin-top:64px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .article-body{font-size:16px;line-height:1.85}
  .btn{height:48px;width:100%}
  .nav-toggle{width:44px;height:44px}
  .breadcrumb .current{max-width:200px}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px}
}

/* roulang page: category1 */
/* ============================================================
   设计令牌
   ============================================================ */
:root{
  --bg:            #0B0E13;
  --bg-alt:        #12161F;
  --surface:       #171C27;
  --surface-hi:    #1E2431;
  --bg-footer:     #08090D;

  --line:          rgba(255,255,255,0.08);
  --line-strong:   rgba(255,255,255,0.16);

  --brand:         #BEE94B;
  --brand-hover:   #D2F86A;
  --brand-active:  #A5CC35;
  --second:        #3FE0D0;
  --accent:        #FF7A59;

  --text-title:    #F2F5F8;
  --text-body:     #C9D1DC;
  --text-muted:    #8C97A8;
  --text-disabled: #5A6474;

  --radius-card:   16px;
  --radius-img:    12px;
  --radius-input:  12px;
  --radius-btn:    10px;
  --radius-pill:   999px;

  --shadow-cold:   0 0 24px rgba(190,233,75,0.18);
  --shadow-soft:   0 12px 32px rgba(0,0,0,0.35);

  --container:     1200px;
  --reading:       760px;

  --gap:           24px;
  --space-section: 96px;

  --font-cn: "Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}

/* ============================================================
   Reset / Base
   ============================================================ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding-top:68px;
  background:var(--bg);
  color:var(--text-body);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:0.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto;}
a{color:var(--second);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:var(--brand);}
button{font-family:inherit;font-size:inherit;color:inherit;}
input,select,textarea{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text-title);font-weight:700;letter-spacing:0;}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.25;font-weight:800;}
h2{font-size:clamp(24px,3vw,34px);line-height:1.35;margin-top:48px;margin-bottom:16px;}
h3{font-size:20px;line-height:1.45;font-weight:600;margin-top:32px;margin-bottom:12px;}
p{margin:0 0 1.15em;}
ul,ol{margin:0 0 1.15em;padding-left:1.25em;}
li{margin-bottom:.5em;line-height:1.8;}
hr{border:0;border-top:1px solid var(--line);margin:32px 0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(190,233,75,.28);color:#F2F5F8;}

/* ============================================================
   布局容器与板块
   ============================================================ */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:var(--space-section) 0;}
.section--alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section--tight{padding:64px 0;}
.section-head{max-width:720px;margin-bottom:40px;}
.section-head h2{margin-top:0;}
.section-head p{margin-bottom:0;color:var(--text-muted);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);margin-bottom:14px;font-weight:600;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);display:inline-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:46px;padding:0 22px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;
  cursor:pointer;white-space:nowrap;
  transition:background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.btn--primary{background:var(--brand);color:#0B0E13;border-color:var(--brand);}
.btn--primary:hover{background:var(--brand-hover);border-color:var(--brand-hover);color:#0B0E13;box-shadow:var(--shadow-cold);}
.btn--primary:active{background:var(--brand-active);border-color:var(--brand-active);transform:translateY(1px);}
.btn--ghost{background:transparent;color:var(--text-title);border-color:var(--line-strong);}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn--ghost:active{transform:translateY(1px);}
.btn--second{background:transparent;color:var(--second);border-color:rgba(63,224,208,.4);}
.btn--second:hover{color:var(--second);border-color:var(--second);box-shadow:0 0 24px rgba(63,224,208,.15);}
.btn--block{width:100%;}
.btn--sm{min-height:38px;padding:0 16px;font-size:14px;}
.btn[disabled],.btn.is-disabled{background:#2A303C;border-color:#2A303C;color:var(--text-disabled);cursor:not-allowed;box-shadow:none;transform:none;}

.text-link{
  color:var(--brand);font-weight:600;font-size:14px;
  text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;
}
.text-link:hover{color:var(--brand-hover);}

/* ============================================================
   Header / Nav
   ============================================================ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  height:68px;
  background:rgba(11,14,19,.72);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px;}

.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-title);}
.brand:hover{color:var(--text-title);}
.brand__mark{
  width:12px;height:26px;flex:0 0 auto;
  border-radius:3px;
  background:linear-gradient(180deg,var(--brand) 0%,rgba(190,233,75,.35) 100%);
  position:relative;display:inline-block;
}
.brand__mark::after{
  content:"";position:absolute;right:-5px;top:0;
  width:2px;height:100%;border-radius:2px;
  background:rgba(63,224,208,.55);
}
.brand__text{display:flex;flex-direction:column;line-height:1.15;}
.brand__main{font-size:15px;font-weight:700;letter-spacing:.02em;}
.brand__sub{font-size:11px;color:var(--text-muted);letter-spacing:.18em;text-transform:uppercase;}

.nav__links{display:flex;align-items:center;gap:34px;}
.nav__link{
  position:relative;
  font-size:14px;font-weight:500;color:#A9B3C0;
  padding:6px 0;
  transition:color .2s ease;
}
.nav__link:hover{color:var(--text-title);}
.nav__link.is-active{color:var(--text-title);}
.nav__link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-8px;
  height:2px;background:var(--brand);border-radius:2px;
}
.nav__right{display:flex;align-items:center;gap:12px;}

.nav-toggle{
  display:none;
  width:40px;height:40px;
  background:transparent;border:1px solid var(--line-strong);border-radius:10px;
  cursor:pointer;padding:0;
  position:relative;
}
.nav-toggle span{
  position:absolute;left:11px;right:11px;height:1.5px;background:var(--text-title);
  transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle span:nth-child(1){top:16px;}
.nav-toggle span:nth-child(2){top:22px;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(3px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){transform:translateY(-3px) rotate(-45deg);}

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--text-muted);
  margin-bottom:18px;
}
.breadcrumb a{color:var(--text-muted);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--text-disabled);}
.breadcrumb .current{color:var(--text-body);}

/* ============================================================
   页面头（半高）
   ============================================================ */
.page-hero{
  position:relative;
  min-height:300px;
  display:flex;align-items:center;
  background-color:var(--bg);
  background-image:
    linear-gradient(90deg,rgba(11,14,19,.92) 0%,rgba(11,14,19,.78) 55%,rgba(11,14,19,.66) 100%),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center right;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.10) 1px,transparent 1px);
  background-size:22px 22px;
  opacity:.5;
}
.page-hero .container{position:relative;z-index:2;padding-top:56px;padding-bottom:56px;}
.page-hero h1{max-width:860px;margin-bottom:14px;}
.page-hero h1 .hl{color:var(--brand);}
.page-hero__sub{max-width:640px;font-size:17px;color:var(--text-body);margin:0;}
.page-hero__meta{
  display:flex;flex-wrap:wrap;gap:10px 22px;align-items:center;
  margin-top:26px;font-size:13px;color:var(--text-muted);
}
.page-hero__meta .dot{width:4px;height:4px;border-radius:50%;background:var(--brand);display:inline-block;}

/* ============================================================
   8+4 两栏布局
   ============================================================ */
.layout-8-4{
  display:grid;
  grid-template-columns:minmax(0,8fr) minmax(0,4fr);
  gap:var(--gap);
  align-items:start;
}
.main-col{min-width:0;}
.side-col{min-width:0;}

/* 正文说明块 */
.lead{
  font-size:17.5px;
  color:var(--text-body);
  border-left:3px solid var(--brand);
  background:var(--bg-alt);
  padding:20px 24px;
  border-radius:0 var(--radius-card) var(--radius-card) 0;
  margin-bottom:32px;
}

.panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px 32px;
  margin-bottom:24px;
}
.panel > h2:first-child,
.panel > h3:first-child{margin-top:0;}
.panel__title{
  display:flex;align-items:center;gap:10px;
  font-size:20px;font-weight:600;color:var(--text-title);
  margin:0 0 16px;
}
.panel__title::before{
  content:"";width:3px;height:18px;border-radius:2px;background:var(--brand);display:inline-block;
}
.panel p:last-child{margin-bottom:0;}

/* 编号要点清单 */
.num-list{list-style:none;margin:0;padding:0;}
.num-list li{
  position:relative;
  padding:16px 0 16px 56px;
  border-bottom:1px solid var(--line);
  margin:0;
}
.num-list li:last-child{border-bottom:0;padding-bottom:0;}
.num-list li:first-child{padding-top:0;}
.num-list .num{
  position:absolute;left:0;top:15px;
  font-size:14px;font-weight:700;color:var(--brand);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}
.num-list li:first-child .num{top:0;}
.num-list strong{color:var(--text-title);display:block;font-size:16px;font-weight:600;margin-bottom:2px;}
.num-list span{color:var(--text-muted);font-size:15px;}

/* 参数小卡组 */
.metric-strip{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
  margin:8px 0 4px;
}
.metric-mini{
  background:var(--bg-alt);
  border:1px solid var(--line);
  border-radius:var(--radius-img);
  padding:18px 18px 16px;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.metric-mini:hover{border-color:rgba(190,233,75,.3);transform:translateY(-2px);box-shadow:var(--shadow-cold);}
.metric-mini__label{font-size:13px;color:var(--text-muted);margin-bottom:6px;}
.metric-mini__value{
  font-size:26px;font-weight:800;color:var(--brand);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.metric-mini__unit{font-size:12px;color:var(--text-muted);margin-left:4px;font-weight:500;}
.metric-mini__note{font-size:12.5px;color:var(--text-disabled);margin-top:6px;line-height:1.6;}

/* 图文块 */
.figure{
  margin:8px 0 24px;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-alt);
}
.figure img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  border-radius:0;
}
.figure figcaption{
  padding:12px 18px;
  font-size:13px;
  color:var(--text-muted);
  border-top:1px solid var(--line);
  background:var(--surface);
}

/* 定义列表 */
.def-list{margin:0;}
.def-list__row{
  display:grid;
  grid-template-columns:180px minmax(0,1fr);
  gap:20px;
  padding:16px 0;
  border-bottom:1px solid var(--line);
}
.def-list__row:last-child{border-bottom:0;padding-bottom:0;}
.def-list__row:first-child{padding-top:0;}
.def-list dt{color:var(--text-title);font-weight:600;font-size:15px;}
.def-list dd{margin:0;color:var(--text-muted);font-size:15px;}

/* 提示条 */
.notice{
  display:flex;gap:12px;align-items:flex-start;
  border:1px solid var(--line);
  border-left:3px solid var(--second);
  background:var(--bg-alt);
  border-radius:0 var(--radius-img) var(--radius-img) 0;
  padding:16px 20px;
  font-size:14.5px;
  color:var(--text-muted);
  margin-bottom:24px;
}
.notice strong{color:var(--text-title);}
.notice--warn{border-left-color:var(--accent);}

/* ============================================================
   侧栏粘性卡
   ============================================================ */
.side-card{
  position:sticky;
  top:92px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 24px;
  margin-bottom:24px;
}
.side-card + .side-card{margin-top:0;}
.side-card h3{
  margin:0 0 16px;
  font-size:16px;font-weight:600;
  display:flex;align-items:center;gap:8px;
  padding-bottom:12px;
  border-bottom:1px solid var(--line);
}
.side-card h3::before{
  content:"";width:4px;height:4px;border-radius:50%;background:var(--brand);display:inline-block;
}
.cat-nav{list-style:none;margin:0 0 4px;padding:0;}
.cat-nav li{margin:0;}
.cat-nav a{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:11px 0;
  font-size:14.5px;
  color:var(--text-body);
  border-bottom:1px solid var(--line);
  transition:color .2s ease,padding-left .2s ease;
}
.cat-nav li:last-child a{border-bottom:0;}
.cat-nav a::after{content:"→";font-size:13px;color:var(--text-disabled);transition:color .2s ease,transform .2s ease;}
.cat-nav a:hover{color:var(--brand);padding-left:4px;}
.cat-nav a:hover::after{color:var(--brand);transform:translateX(2px);}
.cat-nav a.is-current{color:var(--brand);font-weight:600;}
.cat-nav a.is-current::after{color:var(--brand);content:"•";}

.side-list{list-style:none;margin:0;padding:0;font-size:14.5px;}
.side-list li{
  position:relative;
  padding:10px 0 10px 18px;
  border-bottom:1px solid var(--line);
  color:var(--text-muted);
  margin:0;
}
.side-list li:last-child{border-bottom:0;padding-bottom:0;}
.side-list li::before{
  content:"";position:absolute;left:0;top:20px;
  width:6px;height:6px;border-radius:2px;background:var(--brand);
}
.side-list li:first-child::before{top:20px;}
.side-contact p{margin:0 0 8px;font-size:14px;color:var(--text-muted);}
.side-contact p:last-child{margin-bottom:0;}
.side-contact strong{color:var(--text-body);font-weight:500;}
.side-card .btn{margin-top:18px;}

/* ============================================================
   FAQ 手风琴
   ============================================================ */
.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;justify-content:space-between;gap:20px;
  padding:22px 20px;
  background:transparent;border:0;border-left:2px solid transparent;
  text-align:left;cursor:pointer;
  font-size:16px;font-weight:500;color:var(--text-title);
  transition:background .2s ease,border-color .2s ease;
}
.faq__q:hover{background:var(--bg-alt);}
.faq__item.is-open .faq__q{border-left-color:var(--brand);background:var(--bg-alt);}
.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:1px;
  transition:transform .2s ease,opacity .2s ease;
}
.faq__icon::before{left:0;right:0;top:7.25px;height:1.5px;}
.faq__icon::after{top:0;bottom:0;left:7.25px;width:1.5px;}
.faq__item.is-open .faq__icon::after{transform:rotate(90deg);opacity:0;}
.faq__a{
  display:none;
  padding:0 20px 24px 20px;
  font-size:15px;line-height:1.9;color:var(--text-muted);
  border-left:2px solid var(--brand);
}
.faq__item.is-open .faq__a{display:block;}
.faq__a p:last-child{margin-bottom:0;}

/* ============================================================
   CTA 转化条
   ============================================================ */
.cta-bar{
  background:var(--bg-alt);
  border:1px solid var(--line);
  border-top:2px solid var(--brand);
  border-radius:0 0 var(--radius-card) var(--radius-card);
  padding:32px 36px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  flex-wrap:wrap;
  margin-bottom:0;
}
.cta-bar__text h2{margin:0 0 6px;font-size:clamp(20px,2.4vw,26px);}
.cta-bar__text p{margin:0;color:var(--text-muted);font-size:15px;}
.cta-bar__actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  background:var(--bg-footer);
  border-top:1px solid var(--line);
  padding:72px 0 0;
  margin-top:var(--space-section);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand__logo{
  display:flex;align-items:center;gap:10px;
  margin-bottom:16px;
}
.footer-brand__logo strong{color:var(--text-title);font-size:16px;font-weight:700;}
.footer-brand p{color:var(--text-muted);font-size:14px;max-width:320px;margin:0;}
.footer-col h4{
  font-size:14px;font-weight:600;color:var(--text-title);
  margin:0 0 18px;letter-spacing:.02em;
}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--text-muted);}
.footer-col a:hover{color:var(--brand);}
.footer-meta p{font-size:14px;color:var(--text-muted);margin:0 0 10px;}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-disabled);
}
.footer-bottom a{color:var(--text-disabled);}
.footer-bottom a:hover{color:var(--brand);}
.footer-bottom .sep{margin:0 8px;color:#2A303C;}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1280px){
  :root{--container:1100px;}
}
@media (max-width:1024px){
  :root{--space-section:72px;}
  .layout-8-4{grid-template-columns:minmax(0,1fr);}
  .side-card{position:static;top:auto;}
  .metric-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .panel{padding:24px 24px;}
}
@media (max-width:768px){
  :root{--space-section:56px;}
  body{padding-top:56px;font-size:16px;}
  .site-header{height:56px;}
  .nav{height:56px;}
  .nav__links{
    position:fixed;left:0;right:0;top:56px;
    display:none;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(11,14,19,.98);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    padding:8px 24px 24px;
    max-height:calc(100vh - 56px);
    overflow-y:auto;
  }
  .nav__links.is-open{display:flex;}
  .nav__link{
    padding:16px 0;
    font-size:16px;
    border-bottom:1px solid var(--line);
  }
  .nav__link.is-active::after{display:none;}
  .nav__link.is-active{color:var(--brand);}
  .nav__links .btn{margin-top:18px;}
  .nav-toggle{display:block;}
  .nav__cta{display:none;}
  .page-hero{min-height:240px;background-position:center;}
  .page-hero .container{padding-top:40px;padding-bottom:40px;}
  .def-list__row{grid-template-columns:1fr;gap:6px;}
  .cta-bar{padding:26px 22px;}
  .cta-bar__actions{width:100%;}
  .cta-bar__actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .faq__q{padding:18px 12px;font-size:15.5px;}
  .faq__a{padding:0 12px 20px;}
}
@media (max-width:520px){
  h1{font-size:30px;}
  :root{--space-section:56px;}
  .container{padding:0 18px;}
  .metric-strip{grid-template-columns:1fr;}
  .btn{width:100%;min-height:48px;}
  .cta-bar__actions{gap:10px;}
  .panel{padding:20px 18px;}
  .side-card{padding:22px 18px;}
  .num-list li{padding-left:44px;}
  .footer-bottom{font-size:12.5px;}
}

/* roulang page: category2 */
/* =========================================================
   1. 设计令牌
   ========================================================= */
:root{
  --bg:#0B0E13;
  --bg-alt:#12161F;
  --surface:#171C27;
  --surface-hi:#1E2431;
  --footer-bg:#08090D;

  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);

  --brand:#BEE94B;
  --brand-hover:#D2F86A;
  --brand-press:#A5CC35;
  --brand-ink:#0B0E13;
  --sub:#3FE0D0;
  --accent:#FF7A59;

  --text:#F2F5F8;
  --text-body:#C9D1DC;
  --text-muted:#8C97A8;
  --text-disabled:#5A6474;

  --r-card:16px;
  --r-img:12px;
  --r-input:12px;
  --r-btn:10px;
  --r-pill:999px;

  --w-container:1200px;
  --w-read:760px;
  --gap:24px;
  --sec-y:104px;
  --nav-h:68px;

  --shadow-hover:0 0 24px rgba(190,233,75,.18);
  --t:200ms ease;

  --font:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}

/* =========================================================
   2. 基础 reset 与排版
   ========================================================= */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding-top:var(--nav-h);
  background:var(--bg);
  color:var(--text-body);
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color var(--t),opacity var(--t);}
a:hover{color:var(--brand);}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;line-height:1.35;}
h1{font-size:clamp(30px,4.4vw,52px);font-weight:800;line-height:1.25;letter-spacing:-.01em;}
h2{font-size:clamp(24px,3vw,34px);font-weight:700;}
h3{font-size:20px;font-weight:600;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0 0 1.1em;padding-left:0;list-style:none;}
li{line-height:1.8;}
button{font-family:inherit;}
input,select,textarea{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(190,233,75,.28);color:var(--text);}
.num{font-variant-numeric:tabular-nums;}

/* =========================================================
   3. 容器与区块
   ========================================================= */
.container{width:100%;max-width:var(--w-container);margin:0 auto;padding:0 24px;}
.section{padding:var(--sec-y) 0;}
.section--alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section--tight{padding-top:72px;padding-bottom:72px;}
.sec-head{max-width:760px;margin-bottom:52px;}
.sec-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--brand);letter-spacing:.16em;
  text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--brand);}
.sec-head h2{margin-bottom:16px;}
.sec-head p{color:var(--text-muted);font-size:16px;max-width:680px;}
.lead{font-size:17px;color:var(--text-body);}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* =========================================================
   4. 顶部导航
   ========================================================= */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  height:var(--nav-h);
  background:rgba(11,14,19,.72);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:32px;height:var(--nav-h);}
.brand{display:flex;align-items:center;gap:11px;flex:none;}
.brand__mark{
  width:11px;height:11px;border-radius:3px;background:var(--brand);
  box-shadow:0 0 12px rgba(190,233,75,.55);flex:none;
}
.brand__text{display:flex;flex-direction:column;line-height:1.15;}
.brand__main{font-size:15px;font-weight:700;color:var(--text);letter-spacing:.02em;}
.brand__sub{font-size:11px;color:var(--text-muted);letter-spacing:.18em;}
.nav__links{display:flex;align-items:center;gap:34px;}
.nav__link{
  position:relative;font-size:14px;font-weight:500;color:#A9B3C0;
  padding:6px 0;white-space:nowrap;transition:color var(--t);
}
.nav__link:hover{color:var(--text);}
.nav__link.is-active{color:var(--text);}
.nav__link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;
  background:var(--brand);border-radius:2px;
}
.nav__right{display:flex;align-items:center;gap:14px;flex:none;}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line-strong);
  border-radius:10px;background:transparent;cursor:pointer;
  flex-direction:column;justify-content:center;align-items:center;gap:6px;
  transition:border-color var(--t);
}
.nav-toggle span{display:block;width:16px;height:1.5px;background:var(--text);transition:transform var(--t),opacity var(--t);}
.nav-toggle:hover{border-color:var(--brand);}
.site-header.is-open .nav-toggle span:first-child{transform:translateY(3.75px) rotate(45deg);}
.site-header.is-open .nav-toggle span:last-child{transform:translateY(-3.75px) rotate(-45deg);}

/* =========================================================
   5. 按钮 / 标签 / 徽章
   ========================================================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:14px;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
}
.btn--primary{background:var(--brand);color:var(--brand-ink);}
.btn--primary:hover{background:var(--brand-hover);color:var(--brand-ink);box-shadow:var(--shadow-hover);transform:translateY(-1px);}
.btn--primary:active{background:var(--brand-press);transform:none;box-shadow:none;}
.btn--ghost{background:transparent;color:var(--text);border-color:var(--line-strong);}
.btn--ghost:hover{color:var(--brand);border-color:var(--brand);transform:translateY(-1px);}
.btn--ghost:active{transform:none;color:var(--brand-press);border-color:var(--brand-press);}
.btn--link{
  height:auto;padding:0;border:0;background:none;color:var(--brand);
  font-size:14.5px;font-weight:600;text-decoration:underline;
  text-underline-offset:3px;text-decoration-thickness:1px;
}
.btn--link:hover{color:var(--brand-hover);}
.btn[disabled],.btn.is-disabled{background:#2A303C;color:var(--text-disabled);border-color:transparent;cursor:not-allowed;box-shadow:none;transform:none;}
.chip{
  display:inline-flex;align-items:center;height:28px;padding:0 13px;
  border-radius:var(--r-pill);border:1px solid var(--line-strong);
  font-size:12.5px;color:var(--text-muted);white-space:nowrap;
}
.chip--brand{border-color:rgba(190,233,75,.36);color:var(--brand);background:rgba(190,233,75,.06);}
.chip--sub{border-color:rgba(63,224,208,.32);color:var(--sub);background:rgba(63,224,208,.06);}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;}

/* =========================================================
   6. 页面头（半高 240–320px）
   ========================================================= */
.page-head{
  position:relative;overflow:hidden;
  min-height:300px;display:flex;align-items:center;
  padding:56px 0;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(rgba(11,14,19,.76),rgba(11,14,19,.92)),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:22px 22px;opacity:.6;
}
.page-head__inner{position:relative;z-index:2;max-width:840px;}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;color:var(--text-muted);margin-bottom:20px;
}
.crumb a{color:var(--text-muted);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--text-disabled);}
.crumb .current{color:var(--text-body);}
.page-head h1{margin-bottom:18px;}
.page-head h1 .hl{color:var(--brand);}
.page-head__sub{font-size:17px;color:var(--text-body);max-width:640px;margin-bottom:26px;}
.meta-strip{display:flex;flex-wrap:wrap;gap:14px 28px;align-items:center;}
.meta-strip div{display:flex;align-items:baseline;gap:8px;font-size:13.5px;color:var(--text-muted);}
.meta-strip b{font-variant-numeric:tabular-nums;font-size:19px;color:var(--brand);font-weight:700;}

/* =========================================================
   7. 图文交替区块
   ========================================================= */
.alt-list{display:grid;gap:0;}
.alt-row{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
  gap:56px;align-items:center;
  padding:56px 0;border-bottom:1px solid var(--line);
}
.alt-row:first-child{padding-top:0;}
.alt-row:last-child{border-bottom:0;padding-bottom:0;}
.alt-row--reverse .alt-row__media{order:2;}
.alt-row__media{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);background:linear-gradient(140deg,#161B25 0%,#0E121A 60%,#131A1E 100%);
}
.alt-row__media::before{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:18px 18px;
}
.alt-row__media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  position:relative;z-index:2;opacity:.94;
}
.alt-row__body h2{margin-bottom:16px;}
.alt-row__body p{color:var(--text-body);max-width:560px;}
.alt-index{
  display:inline-block;font-size:12.5px;letter-spacing:.18em;
  color:var(--brand);margin-bottom:14px;font-variant-numeric:tabular-nums;
}
.deflist{display:grid;gap:14px;margin:22px 0 0;}
.deflist__row{
  display:grid;grid-template-columns:120px 1fr;gap:18px;
  padding-bottom:14px;border-bottom:1px dashed var(--line);
}
.deflist__row:last-child{border-bottom:0;padding-bottom:0;}
.deflist dt{color:var(--brand);font-size:14px;font-weight:600;}
.deflist dd{margin:0;color:var(--text-muted);font-size:15px;line-height:1.8;}
.checklist{display:grid;gap:14px;margin:22px 0 0;}
.checklist li{
  position:relative;padding-left:26px;font-size:15.5px;color:var(--text-body);
}
.checklist li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;
  border-radius:2px;background:var(--brand);
}
.checklist li b{color:var(--text);font-weight:600;}

/* 提示条 */
.notice{
  display:flex;gap:14px;align-items:flex-start;
  margin-top:24px;padding:18px 20px;
  border-radius:var(--r-card);border:1px solid var(--line-strong);
  background:var(--bg-alt);font-size:14.5px;color:var(--text-muted);
}
.notice::before{
  content:"";flex:none;width:3px;align-self:stretch;border-radius:3px;background:var(--sub);
}
.notice--warn{border-color:rgba(255,122,89,.38);}
.notice--warn::before{background:var(--accent);}
.notice--warn strong{color:var(--accent);}
.notice strong{color:var(--text);font-weight:600;}

/* =========================================================
   8. 步骤时间线
   ========================================================= */
.steps{position:relative;margin-top:8px;}
.steps::before{
  content:"";position:absolute;left:23px;top:16px;bottom:26px;width:1px;background:var(--line-strong);
}
.step{position:relative;display:grid;grid-template-columns:48px 1fr;gap:26px;padding-bottom:34px;}
.step:last-child{padding-bottom:0;}
.step__no{
  width:48px;height:48px;border-radius:14px;flex:none;
  display:flex;align-items:center;justify-content:center;
  background:var(--surface);border:1px solid var(--line-strong);
  color:var(--brand);font-weight:700;font-size:15px;
  font-variant-numeric:tabular-nums;position:relative;z-index:2;
  transition:border-color var(--t),box-shadow var(--t);
}
.step:hover .step__no{border-color:rgba(190,233,75,.45);box-shadow:var(--shadow-hover);}
.step__body{padding-top:2px;}
.step__body h3{margin-bottom:10px;font-size:19px;}
.step__body p{color:var(--text-muted);font-size:15px;margin-bottom:0;max-width:640px;}

/* =========================================================
   9. 内容卡片组（非等宽三列）
   ========================================================= */
.cardgrid{display:grid;grid-template-columns:1.35fr 1fr;gap:var(--gap);align-items:stretch;}
.card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:26px;
  transition:transform var(--t),border-color var(--t),box-shadow var(--t),background var(--t);
}
.card:hover{transform:translateY(-2px);border-color:rgba(190,233,75,.3);box-shadow:var(--shadow-hover);}
.card--lg{
  position:relative;padding:0;overflow:hidden;
  display:flex;flex-direction:column;justify-content:flex-end;min-height:420px;
}
.card--lg img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.5;
}
.card--lg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,14,19,.15) 0%,rgba(11,14,19,.88) 68%,rgba(11,14,19,.96) 100%);
}
.card--lg .card__inner{position:relative;z-index:2;padding:32px;}
.card--lg h3{font-size:22px;margin-bottom:12px;}
.card--lg p{color:var(--text-body);font-size:15px;margin-bottom:18px;}
.card__stack{display:grid;grid-template-rows:1fr 1fr;gap:var(--gap);}
.card--compact{display:flex;flex-direction:column;justify-content:space-between;}
.card__no{
  font-size:12.5px;letter-spacing:.18em;color:var(--brand);
  font-variant-numeric:tabular-nums;margin-bottom:14px;
}
.card h3{font-size:19px;margin-bottom:12px;}
.card p{color:var(--text-muted);font-size:14.8px;margin-bottom:0;}
.card__foot{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  margin-top:20px;padding-top:16px;border-top:1px solid var(--line);
}
.card__foot span{font-size:13px;color:var(--text-disabled);}
.arrow-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--brand);
}
.arrow-link::after{content:"→";transition:transform var(--t);}
.arrow-link:hover{color:var(--brand-hover);}
.arrow-link:hover::after{transform:translateX(3px);}

/* =========================================================
   10. FAQ 手风琴
   ========================================================= */
.faq-layout{display:grid;grid-template-columns:340px minmax(0,1fr);gap:64px;align-items:start;}
.faq-aside{position:sticky;top:calc(var(--nav-h) + 32px);}
.faq-aside h2{margin-bottom:16px;}
.faq-aside p{color:var(--text-muted);font-size:15px;margin-bottom:22px;}
.acc{border-top:1px solid var(--line);}
.acc__item{border-bottom:1px solid var(--line);transition:background var(--t),box-shadow var(--t),padding var(--t);}
.acc__item.is-open{
  background:var(--bg-alt);
  box-shadow:inset 3px 0 0 var(--brand);
  padding-left:22px;padding-right:22px;
}
.acc__btn{
  width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:22px 0;background:none;border:0;cursor:pointer;text-align:left;
  color:var(--text);font-size:16px;font-weight:500;line-height:1.6;
}
.acc__btn:hover{color:var(--brand);}
.acc__sign{position:relative;flex:none;width:14px;height:14px;margin-top:6px;}
.acc__sign::before,.acc__sign::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
  transition:transform var(--t),opacity var(--t);
}
.acc__sign::before{left:0;right:0;top:6.25px;height:1.5px;}
.acc__sign::after{top:0;bottom:0;left:6.25px;width:1.5px;}
.acc__item.is-open .acc__sign::after{transform:scaleY(0);opacity:0;}
.acc__panel{max-height:0;overflow:hidden;transition:max-height 280ms ease;}
.acc__item.is-open .acc__panel{max-height:420px;}
.acc__panel p{
  padding:0 0 22px;color:var(--text-muted);font-size:15px;line-height:1.9;max-width:660px;
}

/* =========================================================
   11. 单行 CTA 转化条
   ========================================================= */
.cta-bar{
  background:var(--bg-alt);border-top:2px solid var(--brand);border-bottom:1px solid var(--line);
}
.cta-bar__inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:38px 0;
}
.cta-bar__text h2{font-size:clamp(20px,2.3vw,26px);margin-bottom:8px;}
.cta-bar__text p{color:var(--text-muted);font-size:14.5px;margin:0;}
.cta-bar__actions{display:flex;gap:14px;flex:none;}

/* =========================================================
   12. 页脚
   ========================================================= */
.site-footer{background:var(--footer-bg);border-top:1px solid var(--line);padding:72px 0 0;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px;
  padding-bottom:56px;
}
.footer-brand__logo{display:flex;align-items:center;gap:11px;margin-bottom:18px;}
.footer-brand__logo strong{color:var(--text);font-size:16px;font-weight:700;}
.footer-brand p{color:var(--text-muted);font-size:14.5px;max-width:340px;margin:0;}
.footer-col h4{font-size:14px;color:var(--text);margin-bottom:18px;letter-spacing:.04em;}
.footer-col ul{display:grid;gap:12px;margin:0;}
.footer-col li a{font-size:14.5px;color:var(--text-muted);}
.footer-col li a:hover{color:var(--brand);}
.footer-meta p{font-size:14.5px;color:var(--text-muted);margin:0 0 12px;}
.footer-meta p:last-child{margin-bottom:0;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0 28px;border-top:1px solid var(--line);
  font-size:13.5px;color:var(--text-disabled);
}
.footer-bottom a{color:var(--text-muted);}
.footer-bottom a:hover{color:var(--brand);}
.footer-bottom .sep{margin:0 8px;color:var(--text-disabled);}

/* =========================================================
   13. 加载骨架 / 空态（备用组件）
   ========================================================= */
.skeleton{
  border-radius:var(--r-card);background:linear-gradient(90deg,#151A24 0%,#1E2431 50%,#151A24 100%);
  background-size:200% 100%;animation:sk 1.4s ease-in-out infinite;min-height:120px;
}
@keyframes sk{0%{background-position:200% 0;}100%{background-position:-200% 0;}}
.empty{
  border:1px dashed var(--line-strong);border-radius:var(--r-card);
  padding:40px 24px;text-align:center;color:var(--text-disabled);font-size:14.5px;
}

/* =========================================================
   14. 响应式
   ========================================================= */
@media (max-width:1280px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:40px;}
  .footer-col:last-child{grid-column:1 / -1;}
}
@media (max-width:1024px){
  :root{--sec-y:72px;}
  .alt-row{gap:36px;}
  .faq-layout{grid-template-columns:1fr;gap:32px;}
  .faq-aside{position:static;}
  .cardgrid{grid-template-columns:1fr;}
  .card--lg{min-height:340px;}
  .card__stack{grid-template-rows:auto auto;}
}
@media (max-width:768px){
  :root{--nav-h:56px;--sec-y:56px;}
  body{font-size:16px;}
  .container{padding:0 20px;}
  .nav-toggle{display:flex;}
  .nav__links{
    position:fixed;top:var(--nav-h);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#0B0E13;border-bottom:1px solid var(--line);
    padding:6px 20px 24px;
    transform:translateY(-14px);opacity:0;visibility:hidden;pointer-events:none;
    transition:transform 220ms ease,opacity 220ms ease,visibility 220ms;
    max-height:calc(100vh - var(--nav-h));overflow-y:auto;
  }
  .site-header.is-open .nav__links{transform:none;opacity:1;visibility:visible;pointer-events:auto;}
  .nav__link{font-size:16px;padding:17px 0;border-bottom:1px solid var(--line);color:var(--text-body);}
  .nav__link.is-active{color:var(--brand);}
  .nav__link.is-active::after{display:none;}
  .nav__cta{display:none;}
  .page-head{min-height:240px;padding:48px 0;}
  .page-head__sub{font-size:16px;}
  .alt-row,.alt-row--reverse{grid-template-columns:1fr;gap:24px;padding:40px 0;}
  .alt-row--reverse .alt-row__media{order:0;}
  .alt-row__media img{aspect-ratio:16/9;}
  .alt-row__body h2{margin-bottom:14px;}
  .deflist__row{grid-template-columns:1fr;gap:6px;}
  .steps::before{left:20px;}
  .step{grid-template-columns:42px 1fr;gap:18px;}
  .step__no{width:42px;height:42px;border-radius:12px;font-size:14px;}
  .cta-bar__inner{flex-direction:column;align-items:flex-start;gap:22px;padding:32px 0;}
  .cta-bar__actions{width:100%;flex-direction:column;}
  .cta-bar__actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:34px;padding-bottom:40px;}
  .footer-col:last-child{grid-column:auto;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px;}
}
@media (max-width:520px){
  h1{font-size:30px;}
  .brand__main{font-size:14px;}
  .brand__sub{font-size:10px;letter-spacing:.14em;}
  .card{padding:22px;}
  .card--lg .card__inner{padding:24px;}
  .meta-strip{gap:12px 20px;}
  .meta-strip b{font-size:17px;}
  .btn{width:100%;min-height:48px;}
  .btn--link{width:auto;}
  .acc__item.is-open{padding-left:16px;padding-right:16px;}
}