/* roulang page: index */
:root{
  --bg:#060A12;
  --bg-soft:#0A111F;
  --panel:#0F1A2B;
  --primary:#35F2D0;
  --purple:#7C5CFF;
  --warm:#FFB86B;
  --text:#EAF6FF;
  --muted:#9FB3C8;
  --line:rgba(120,220,255,.16);
  --line-strong:rgba(93,230,255,.28);
  --success:#4ADE80;
  --danger:#FF6B81;
  --radius:20px;
  --radius-sm:12px;
  --shadow:0 12px 40px rgba(0,0,0,.35);
  --shadow-hover:0 16px 50px rgba(53,242,208,.12);
  --sidebar-w:248px;
  --content-max:1320px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 82% -8%, rgba(124,92,255,.16), transparent 62%),
    radial-gradient(900px 520px at 6% 4%, rgba(53,242,208,.10), transparent 60%),
    var(--bg);
  min-height:100vh;
}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:700;letter-spacing:0;line-height:1.3}
p{margin:0}
a{color:var(--primary);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:#6bffe4}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}
::selection{background:rgba(53,242,208,.28);color:#03110f}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-soft)}
::-webkit-scrollbar-thumb{background:rgba(120,220,255,.22);border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:rgba(53,242,208,.4)}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--primary);color:#04120f;padding:10px 18px;border-radius:0 0 12px 0;font-weight:600;
}
.skip-link:focus{left:0}
.container{width:100%;max-width:var(--content-max);margin:0 auto;padding:0 28px}
.glass{
  background:rgba(12,22,38,.62);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border:1px solid rgba(93,230,255,.18);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  position:relative;
  overflow:hidden;
}
.glass::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,242,208,.65),transparent);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;border:1px solid transparent;
  font-weight:600;font-size:15px;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,opacity .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),#1fd3ba);
  color:#04120f;
  box-shadow:0 0 24px rgba(53,242,208,.35);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 34px rgba(53,242,208,.55);color:#04120f}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 16px rgba(53,242,208,.35)}
.btn-ghost{
  background:rgba(12,22,38,.5);
  border-color:rgba(120,220,255,.26);
  color:var(--text);
}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);background:rgba(53,242,208,.08)}
.btn-ghost:active{transform:translateY(1px)}
.btn:disabled{opacity:.55;cursor:not-allowed;box-shadow:none;transform:none}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:999px;
  font-size:13px;font-weight:600;letter-spacing:.02em;
  color:var(--primary);
  background:rgba(53,242,208,.10);
  border:1px solid rgba(53,242,208,.28);
}
.badge-warm{color:var(--warm);background:rgba(255,184,107,.10);border-color:rgba(255,184,107,.32)}
.badge-purple{color:#b9a8ff;background:rgba(124,92,255,.12);border-color:rgba(124,92,255,.34)}
.tag{
  display:inline-flex;align-items:center;
  padding:2px 10px;border-radius:8px;
  font-size:12px;font-weight:600;
  color:#b9a8ff;background:rgba(124,92,255,.14);
  border:1px solid rgba(124,92,255,.28);
}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.14em;
  color:var(--primary);margin-bottom:12px;
}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--primary);
}
.link-arrow span{transition:transform .2s ease}
.link-arrow:hover span{transform:translateX(4px)}

/* App shell */
.app{min-height:100vh}
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  display:flex;flex-direction:column;gap:24px;
  padding:26px 18px 22px;
  background:linear-gradient(180deg,rgba(10,17,31,.96),rgba(6,10,18,.98));
  border-right:1px solid var(--line);
  z-index:60;
  transition:transform .28s ease;
}
.brand{display:flex;align-items:center;gap:12px;padding:0 6px}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:14px;
  display:grid;place-items:center;
  font-weight:700;font-size:20px;color:#04120f;
  background:linear-gradient(135deg,var(--primary),#20c9ff);
  box-shadow:0 0 20px rgba(53,242,208,.4);
}
.brand-text{display:flex;flex-direction:column;line-height:1.35;min-width:0}
.brand-text strong{font-size:15px;font-weight:700;color:var(--text);letter-spacing:0}
.brand-text em{font-style:normal;font-size:11px;letter-spacing:.22em;color:var(--muted);margin-top:2px}
.nav{display:flex;flex-direction:column;gap:6px;margin-top:4px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;
  height:46px;padding:0 14px;border-radius:12px;
  font-size:15px;font-weight:600;color:var(--muted);
  transition:background .2s ease,color .2s ease;
}
.nav-item svg{width:19px;height:19px;flex:0 0 19px;opacity:.85}
.nav-item:hover{background:rgba(53,242,208,.07);color:var(--text)}
.nav-item.is-active{
  color:var(--primary);
  background:rgba(53,242,208,.09);
  box-shadow:inset 0 0 0 1px rgba(53,242,208,.18);
}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:11px;bottom:11px;width:3px;border-radius:999px;
  background:var(--primary);box-shadow:0 0 12px rgba(53,242,208,.9);
}
.sidebar-foot{margin-top:auto}
.sidebar-card{padding:18px 16px;border-radius:16px}
.sidebar-card h3{font-size:14px;margin-bottom:6px}
.sidebar-card p{font-size:12.5px;color:var(--muted);line-height:1.7;margin-bottom:14px}
.sidebar-card .btn{width:100%}
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:70;
  align-items:center;justify-content:space-between;
  padding:0 16px;
  background:rgba(8,14,24,.94);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.topbar-brand{font-size:15px;font-weight:700;color:var(--text);letter-spacing:0}
.hamburger{
  width:44px;height:44px;border-radius:12px;
  display:grid;place-items:center;
  background:rgba(53,242,208,.08);
  border:1px solid rgba(53,242,208,.22);
  color:var(--primary);cursor:pointer;
  transition:background .2s ease;
}
.hamburger:hover{background:rgba(53,242,208,.16)}
.hamburger span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative}
.hamburger span::before,.hamburger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;
  transition:transform .2s ease;
}
.hamburger span::before{top:-6px}
.hamburger span::after{top:6px}
.overlay{
  display:none;position:fixed;inset:0;z-index:55;
  background:rgba(3,7,13,.68);
  backdrop-filter:blur(2px);
}
.overlay.is-open{display:block}
.main{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}

/* Hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero::before{
  content:"";position:absolute;inset:0;
  background:url(/assets/images/backpic/back-1.png) center/cover no-repeat;
  opacity:.4;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,18,.78),rgba(6,10,18,.92) 62%,var(--bg) 100%);
}
.hero-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.12fr .88fr;gap:48px;align-items:center;
  padding:84px 0 76px;
}
.hero h1{
  font-size:clamp(2.4rem,5vw,4rem);
  line-height:1.18;
  margin:18px 0 20px;
  background:linear-gradient(120deg,#ffffff 18%,#8ef8e6 62%,#b9a8ff 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:17px;color:#c5d7e8;max-width:560px;line-height:1.85}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-stats{display:flex;flex-wrap:wrap;gap:34px;margin-top:44px;padding-top:26px;border-top:1px solid var(--line)}
.hero-stats div{min-width:96px}
.hero-stats strong{display:block;font-size:24px;font-weight:700;color:var(--primary);font-variant-numeric:tabular-nums;line-height:1.2}
.hero-stats span{font-size:13px;color:var(--muted)}
.hero-card{padding:20px;border-radius:var(--radius)}
.hero-card-img{
  border-radius:14px;overflow:hidden;border:1px solid var(--line);margin-bottom:18px;position:relative;
}
.hero-card-img img{width:100%;height:210px;object-fit:cover}
.hero-card-img figcaption{
  position:absolute;left:14px;bottom:12px;
  font-size:12px;font-weight:600;color:#04120f;
  background:rgba(53,242,208,.9);padding:3px 10px;border-radius:999px;
}
.hero-card h2{font-size:15px;color:var(--text);margin-bottom:14px;letter-spacing:0}
.hero-rows{display:flex;flex-direction:column;gap:10px}
.hero-row{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:11px 14px;border-radius:12px;
  background:rgba(9,17,30,.66);border:1px solid var(--line);
}
.hero-row span{font-size:13.5px;color:var(--muted)}
.hero-row strong{font-size:14.5px;color:var(--primary);font-variant-numeric:tabular-nums}

/* Sections */
.section{padding:80px 0}
.section-alt{background:linear-gradient(180deg,rgba(10,17,31,.55),transparent)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:34px;flex-wrap:wrap;
}
.section-head h2{font-size:clamp(1.6rem,2.4vw,2.25rem)}
.section-head p{color:var(--muted);font-size:15px;margin-top:8px;max-width:620px}

/* Ladder */
.ladder{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ladder-node{position:relative;padding-top:46px}
.ladder-node::before{
  content:"";position:absolute;top:8px;left:0;width:16px;height:16px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 16px rgba(53,242,208,.85);
  z-index:2;
}
.ladder-node::after{
  content:"";position:absolute;top:15px;left:24px;right:-24px;height:1px;
  background:linear-gradient(90deg,rgba(53,242,208,.62),rgba(124,92,255,.22));
}
.ladder-node:last-child::after{display:none}
.step{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.18em;
  color:var(--purple);margin-bottom:8px;
}
.ladder-node h3{font-size:1.2rem;margin-bottom:10px}
.ladder-node p{color:var(--muted);font-size:14.5px;margin-bottom:16px;min-height:76px}

/* Plans */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.plan{
  position:relative;display:flex;flex-direction:column;
  padding:28px 24px;border-radius:var(--radius);
  background:var(--panel);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.plan:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.plan:not(.is-featured){opacity:.92}
.plan.is-featured{
  background:rgba(12,22,38,.62);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-color:rgba(53,242,208,.45);
  box-shadow:0 18px 60px rgba(53,242,208,.14);
  transform:translateY(-8px);
}
.plan-badge{
  position:absolute;top:-14px;left:24px;
  padding:4px 14px;border-radius:999px;
  font-size:12px;font-weight:700;color:#04120f;
  background:linear-gradient(135deg,var(--primary),#20c9ff);
  box-shadow:0 0 18px rgba(53,242,208,.45);
}
.plan h3{font-size:1.25rem;margin-bottom:6px}
.plan-sub{font-size:13.5px;color:var(--muted);margin-bottom:18px}
.price{display:flex;align-items:baseline;gap:6px;margin-bottom:20px;padding-bottom:20px;border-bottom:1px dashed rgba(120,220,255,.18)}
.price .num{
  font-size:44px;font-weight:700;line-height:1;
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;color:var(--text);
}
.plan.is-featured .price .num{color:var(--primary)}
.price .unit{font-size:13.5px;color:var(--muted)}
.plan-list{display:flex;flex-direction:column;gap:11px;margin-bottom:26px;flex:1}
.plan-list li{display:flex;gap:10px;font-size:14.5px;color:#c8d9e9;line-height:1.65}
.plan-list li::before{
  content:"";flex:0 0 16px;width:16px;height:16px;margin-top:5px;border-radius:50%;
  background:rgba(53,242,208,.14);
  border:1px solid rgba(53,242,208,.45);
  background-image:linear-gradient(135deg,var(--primary),var(--primary));
  background-size:7px 7px;background-position:center;background-repeat:no-repeat;
  clip-path:circle(50%);
}
.plan .btn{width:100%}

/* Timer bar */
.timer-wrap{padding:0 0 80px}
.timer-bar{
  display:flex;align-items:center;gap:30px;flex-wrap:wrap;
  padding:28px 32px;border-radius:var(--radius);
}
.timer-copy{flex:1 1 300px;min-width:0}
.timer-copy h3{font-size:1.25rem;margin:12px 0 8px}
.timer-copy p{font-size:14.5px;color:var(--muted)}
.timer{display:flex;align-items:center;gap:10px}
.timer-block{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  min-width:70px;padding:10px 8px;border-radius:14px;
  background:rgba(255,184,107,.10);border:1px solid rgba(255,184,107,.32);
}
.timer-block span{
  font-size:26px;font-weight:700;color:var(--warm);
  font-variant-numeric:tabular-nums;line-height:1.1;letter-spacing:.02em;
}
.timer-block em{font-style:normal;font-size:11.5px;color:var(--muted);margin-top:4px}
.timer-bar > .btn{flex:0 0 auto}

/* News */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  display:flex;flex-direction:column;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(53,242,208,.5);box-shadow:var(--shadow-hover)}
.news-card.is-featured{grid-column:span 2}
.news-thumb{display:block;overflow:hidden;background:var(--bg-soft)}
.news-thumb img{width:100%;height:200px;object-fit:cover;transition:transform .35s ease}
.news-card.is-featured .news-thumb img{height:280px}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.news-meta time{font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.news-body h3{font-size:1.15rem;line-height:1.5}
.news-body h3 a{color:var(--text)}
.news-body h3 a:hover{color:var(--primary)}
.news-body p{
  font-size:14px;color:var(--muted);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body .link-arrow{margin-top:auto;padding-top:6px}
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:64px 24px;text-align:center;
  background:var(--panel);border:1px dashed rgba(120,220,255,.24);border-radius:var(--radius);
}
.empty-state svg{width:44px;height:44px;color:rgba(53,242,208,.6)}
.empty-state p{color:var(--muted);font-size:15px}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.faq-item{
  background:rgba(12,22,38,.55);
  border:1px solid var(--line);border-radius:16px;
  padding:0 20px;
  transition:border-color .2s ease,background .2s ease;
}
.faq-item:hover{border-color:rgba(53,242,208,.34)}
.faq-item[open]{background:rgba(15,26,43,.9);border-color:rgba(53,242,208,.34)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0;font-size:15.5px;font-weight:600;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex:0 0 24px;width:24px;height:24px;border-radius:50%;
  display:grid;place-items:center;
  font-size:16px;font-weight:600;color:var(--primary);
  background:rgba(53,242,208,.12);border:1px solid rgba(53,242,208,.3);
  transition:transform .2s ease;
}
.faq-item[open] summary::after{content:"−";transform:rotate(180deg)}
.faq-item p{
  padding:0 0 20px;font-size:14.5px;color:var(--muted);line-height:1.85;
  animation:fadeIn .2s ease;
}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* Form */
.contact-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:start}
.contact-info h2{font-size:clamp(1.6rem,2.4vw,2.25rem);margin-bottom:16px}
.contact-info p{color:var(--muted);font-size:15px;margin-bottom:26px}
.info-list{display:flex;flex-direction:column;gap:14px}
.info-item{
  display:flex;gap:14px;padding:16px 18px;border-radius:14px;
  background:rgba(15,26,43,.7);border:1px solid var(--line);
}
.info-item strong{display:block;font-size:14px;margin-bottom:2px}
.info-item span{font-size:13.5px;color:var(--muted)}
.info-dot{
  flex:0 0 34px;width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;color:var(--primary);
  background:rgba(53,242,208,.1);border:1px solid rgba(53,242,208,.26);
}
.info-dot svg{width:17px;height:17px}
.form-card{padding:30px 28px;border-radius:var(--radius)}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field-full{grid-column:1/-1}
.field label{font-size:13.5px;font-weight:600;color:#c8d9e9}
.field label em{font-style:normal;color:var(--danger);margin-left:2px}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border-radius:12px;
  background:rgba(6,12,22,.86);
  border:1px solid rgba(120,220,255,.2);
  color:var(--text);font-size:14.5px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{resize:vertical;min-height:108px;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:#63788d}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(53,242,208,.16);
}
.field.is-error input,.field.is-error select,.field.is-error textarea{
  border-color:var(--danger);box-shadow:0 0 0 3px rgba(255,107,129,.14);
}
.field.is-ok input,.field.is-ok select,.field.is-ok textarea{border-color:rgba(74,222,128,.6)}
.field .err{font-size:12.5px;color:var(--danger);display:none}
.field.is-error .err{display:block}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--muted)}
.check-row input{width:17px;height:17px;margin-top:4px;accent-color:var(--primary);flex:0 0 17px}
.form-alert{
  display:none;margin-bottom:16px;padding:12px 16px;border-radius:12px;font-size:14px;
  border:1px solid transparent;
}
.form-alert.is-success{display:block;color:#b6f5cd;background:rgba(74,222,128,.1);border-color:rgba(74,222,128,.4)}
.form-alert.is-error{display:block;color:#ffc2ca;background:rgba(255,107,129,.1);border-color:rgba(255,107,129,.4)}
.form-foot{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:22px;flex-wrap:wrap}
.form-foot small{font-size:12.5px;color:var(--muted)}

/* Footer */
.footer{
  margin-top:auto;padding:60px 0 26px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,17,31,.5),rgba(4,8,14,.9));
  position:relative;
}
.footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,242,208,.55),transparent);
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;
  padding-bottom:40px;
}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-mark{width:38px;height:38px;flex:0 0 38px;font-size:18px;border-radius:12px}
.footer-brand strong{font-size:15px;color:var(--text)}
.footer-desc{font-size:13.5px;color:var(--muted);line-height:1.85;max-width:340px}
.footer h4{font-size:14px;color:var(--text);margin-bottom:16px;letter-spacing:.02em}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:13.5px;color:var(--muted)}
.footer-links a:hover{color:var(--primary)}
.footer-contact li{font-size:13.5px;color:var(--muted);margin-bottom:10px;line-height:1.7}
.footer-contact b{color:var(--text);font-weight:600}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:22px;border-top:1px solid rgba(120,220,255,.12);
  font-size:12.5px;color:#7d92a8;
}
.footer-bottom .site-domain{color:#8fa8bd}

@media (max-width:1200px){
  :root{--sidebar-w:220px}
  .container{padding:0 22px}
  .hero-inner{gap:34px;padding:72px 0 64px}
  .section{padding:66px 0}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .news-card.is-featured{grid-column:span 2}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
}
@media (max-width:992px){
  .sidebar{transform:translateX(-100%);width:280px;box-shadow:0 0 60px rgba(0,0,0,.6)}
  .sidebar.is-open{transform:translateX(0)}
  .topbar{display:flex}
  .main{margin-left:0;padding-top:60px}
  .hero-inner{grid-template-columns:1fr;padding:56px 0 52px}
  .hero-card{max-width:520px}
  .plans{grid-template-columns:1fr}
  .plan.is-featured{transform:none}
  .ladder{grid-template-columns:1fr;gap:8px}
  .ladder-node{padding-top:36px;padding-bottom:24px}
  .ladder-node::after{display:none}
  .ladder-node p{min-height:0}
  .contact-wrap{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr}
  .timer-bar{padding:24px}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .section{padding:52px 0}
  .hero h1{font-size:clamp(2rem,8vw,2.8rem)}
  .hero-sub{font-size:15.5px}
  .hero-stats{gap:22px}
  .news-grid{grid-template-columns:1fr}
  .news-card.is-featured{grid-column:span 1}
  .news-card.is-featured .news-thumb img{height:210px}
  .form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .timer-bar{gap:20px}
  .timer-bar > .btn{width:100%}
}
@media (max-width:520px){
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .hero-stats{flex-direction:column;gap:16px}
  .timer{width:100%;justify-content:space-between;gap:8px}
  .timer-block{flex:1;min-width:0}
  .footer-grid{grid-template-columns:1fr}
  .form-card{padding:24px 20px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .news-card:hover .news-thumb img{transform:none}
  .plan:hover{transform:none}
}

/* roulang page: article */
:root{
  --bg:#060A12;
  --bg-2:#0A111F;
  --panel:#0F1A2B;
  --panel-soft:rgba(12,22,38,.62);
  --primary:#35F2D0;
  --primary-soft:rgba(53,242,208,.12);
  --purple:#7C5CFF;
  --amber:#FFB86B;
  --text:#EAF6FF;
  --muted:#9FB3C8;
  --line:rgba(120,220,255,.16);
  --line-strong:rgba(53,242,208,.36);
  --success:#4ADE80;
  --error:#FF6B81;
  --radius:20px;
  --radius-sm:12px;
  --shadow:0 12px 40px rgba(0,0,0,.35);
  --shadow-hover:0 16px 50px rgba(53,242,208,.12);
  --sidebar:248px;
  --container:1320px;
  --ease:200ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  min-width:320px;
  overflow-x:hidden;
  color:var(--text);
  background:
    radial-gradient(circle at 12% 18%,rgba(53,242,208,.06),transparent 28%),
    radial-gradient(circle at 92% 8%,rgba(124,92,255,.08),transparent 30%),
    linear-gradient(180deg,var(--bg),#050810 70%,#050810);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:var(--primary);text-decoration:none;transition:color var(--ease),opacity var(--ease);}
a:hover{color:#7FF8E4;}
button,input,textarea,select{font:inherit;}
button{cursor:pointer;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:1.25em;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;}
::selection{background:rgba(53,242,208,.32);color:#fff;}
.container{width:min(calc(100% - 48px),var(--container));margin:0 auto;}
.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;}

/* 左侧导航 */
.sidebar{
  position:fixed;
  inset:0 auto 0 0;
  z-index:60;
  width:var(--sidebar);
  height:100dvh;
  padding:24px 18px;
  border-right:1px solid var(--line);
  background:linear-gradient(180deg,#08101D 0%,#070C16 100%);
  box-shadow:12px 0 40px rgba(0,0,0,.18);
}
.sidebar-inner{display:flex;flex-direction:column;gap:28px;height:100%;min-height:0;}
.brand{display:flex;align-items:center;gap:12px;color:var(--text);min-width:0;}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  flex:0 0 42px;width:42px;height:42px;border-radius:14px;
  color:#041014;font-weight:800;font-size:1.1rem;
  background:linear-gradient(135deg,var(--primary),#8CFBE8);
  box-shadow:0 0 24px rgba(53,242,208,.28);
}
.brand-text{display:block;font-size:.98rem;font-weight:700;line-height:1.35;letter-spacing:0;overflow-wrap:anywhere;}
.brand-text small{display:block;margin-top:3px;color:var(--muted);font-size:.64rem;font-weight:600;letter-spacing:.22em;text-transform:uppercase;}
.side-nav{display:flex;flex-direction:column;gap:8px;}
.nav-link{
  position:relative;
  display:flex;align-items:center;gap:10px;
  min-height:46px;padding:0 13px;
  border:1px solid transparent;border-radius:12px;
  color:var(--muted);font-size:.93rem;font-weight:600;
  transition:background var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.nav-link::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:999px;
  background:transparent;transition:background var(--ease),box-shadow var(--ease);
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.035);}
.nav-link.is-active{
  color:var(--text);
  border-color:rgba(53,242,208,.18);
  background:linear-gradient(90deg,rgba(53,242,208,.13),rgba(53,242,208,.025));
  box-shadow:0 0 24px rgba(53,242,208,.07);
}
.nav-link.is-active::before{background:var(--primary);box-shadow:0 0 16px rgba(53,242,208,.9);}
.nav-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:24px;height:24px;border-radius:8px;
  color:var(--muted);font-size:.66rem;font-weight:700;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
}
.nav-link.is-active .nav-icon{color:var(--primary);border-color:rgba(53,242,208,.35);}
.sidebar-help{
  margin-top:auto;
  padding:18px;
  border:1px solid rgba(93,230,255,.18);
  border-radius:18px;
  background:rgba(12,22,38,.62);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow);
}
.sidebar-help .help-label{display:block;color:var(--primary);font-size:.72rem;font-weight:700;letter-spacing:.08em;margin-bottom:8px;}
.sidebar-help strong{display:block;font-size:.92rem;line-height:1.55;margin-bottom:14px;}
.sidebar-help .help-action{display:inline-flex;align-items:center;gap:6px;font-size:.84rem;font-weight:700;color:var(--primary);}
.sidebar-help .help-action:hover{gap:10px;}

/* 移动端顶栏与抽屉 */
.topbar{display:none;}
.hamburger{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:rgba(255,255,255,.03);color:var(--text);
}
.hamburger span{position:relative;display:block;width:20px;height:2px;border-radius:2px;background:currentColor;}
.hamburger span::before,.hamburger span::after{
  content:"";position:absolute;left:0;width:20px;height:2px;border-radius:2px;background:currentColor;
}
.hamburger span::before{top:-6px;}
.hamburger span::after{top:6px;}
.drawer-backdrop{position:fixed;inset:0;z-index:55;background:rgba(2,6,14,.72);backdrop-filter:blur(3px);}
.main{margin-left:var(--sidebar);padding-top:0;min-width:0;}

/* 通用板块 */
.section{padding:80px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:32px;}
.section-head h2{margin-top:10px;font-size:clamp(1.6rem,2.4vw,2.25rem);line-height:1.25;letter-spacing:0;}
.section-sub{max-width:58ch;color:var(--muted);font-size:.94rem;line-height:1.8;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-size:.76rem;font-weight:700;letter-spacing:.08em;}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--primary);box-shadow:0 0 12px rgba(53,242,208,.9);}
.badge{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:28px;padding:2px 11px;border-radius:999px;
  font-size:.74rem;font-weight:700;line-height:1.4;
  color:var(--primary);background:rgba(53,242,208,.1);border:1px solid rgba(53,242,208,.25);
}
.badge-purple{color:#C9BDFF;background:rgba(124,92,255,.14);border-color:rgba(124,92,255,.32);}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border:1px solid transparent;border-radius:999px;
  color:#041014;background:var(--primary);
  font-size:.94rem;font-weight:700;line-height:1;text-align:center;
  box-shadow:0 0 24px rgba(53,242,208,.35);
  transition:transform var(--ease),box-shadow var(--ease),filter var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
}
.btn:hover{color:#041014;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 30px rgba(53,242,208,.45);}
.btn:active{transform:translateY(1px);box-shadow:0 0 18px rgba(53,242,208,.28);}
.btn-secondary{color:var(--text);background:rgba(255,255,255,.035);border-color:var(--line);box-shadow:none;backdrop-filter:blur(10px);}
.btn-secondary:hover{color:var(--text);background:rgba(53,242,208,.08);border-color:rgba(53,242,208,.38);transform:translateY(-1px);box-shadow:none;}
.btn-ghost{color:var(--primary);background:transparent;border-color:rgba(53,242,208,.28);box-shadow:none;}
.btn-ghost:hover{color:var(--primary);background:rgba(53,242,208,.08);}
.btn-block{width:100%;}
.btn:disabled,.btn.is-disabled{opacity:.45;pointer-events:none;box-shadow:none;}

/* 文章首屏 */
.article-hero{
  position:relative;
  overflow:hidden;
  padding:58px 0 64px;
  border-bottom:1px solid var(--line);
  background:
    linear-gradient(90deg,rgba(6,10,18,.97) 0%,rgba(6,10,18,.86) 48%,rgba(6,10,18,.7) 100%),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.article-hero::after{
  content:"";position:absolute;right:-120px;bottom:-160px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(53,242,208,.13),transparent 68%);
  pointer-events:none;
}
.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:30px;color:var(--muted);font-size:.83rem;}
.breadcrumbs a{color:var(--muted);}
.breadcrumbs a:hover{color:var(--primary);}
.breadcrumbs .crumb-current{color:var(--text);}
.article-heading-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:40px;align-items:end;position:relative;z-index:1;}
.article-heading h1{
  margin:14px 0 18px;
  max-width:18ch;
  font-size:clamp(2.1rem,4.2vw,3.6rem);
  line-height:1.14;
  font-weight:800;
  letter-spacing:0;
  text-wrap:balance;
}
.h1-brand{display:block;margin-top:12px;color:var(--primary);font-size:.55em;font-weight:700;letter-spacing:.02em;}
.article-lead{max-width:76ch;color:var(--muted);font-size:1.02rem;line-height:1.85;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;margin-top:26px;color:var(--muted);font-size:.84rem;}
.meta-dot{width:4px;height:4px;border-radius:50%;background:var(--muted);opacity:.6;}
.glass-card{
  position:relative;
  overflow:hidden;
  border:1px solid rgba(93,230,255,.18);
  border-radius:var(--radius);
  background:rgba(12,22,38,.62);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow);
}
.glass-card::before{
  content:"";position:absolute;top:0;left:18px;right:18px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,242,208,.65),transparent);
}
.hero-side-card{padding:24px;}
.hero-side-card .side-label{display:block;color:var(--primary);font-size:.7rem;font-weight:700;letter-spacing:.1em;margin-bottom:10px;}
.hero-side-card h2{font-size:1.04rem;line-height:1.45;margin-bottom:12px;letter-spacing:0;}
.hero-side-card p{color:var(--muted);font-size:.86rem;line-height:1.75;}
.article-side-stats{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:18px;}
.stat{padding:12px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.03);}
.stat span{display:block;color:var(--muted);font-size:.7rem;line-height:1.5;}
.stat strong{display:block;margin-top:2px;color:var(--primary);font-size:1rem;font-variant-numeric:tabular-nums;line-height:1.5;}

/* 正文与侧栏 */
.article-section{padding-top:64px;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:40px;align-items:start;}
.article-body{
  min-width:0;
  padding:40px clamp(22px,4vw,44px);
  border:1px solid var(--line);
  border-radius:22px;
  background:var(--panel);
  box-shadow:var(--shadow);
}
.article-content{max-width:760px;margin:0 auto;font-size:1.01rem;line-height:1.9;color:#D7E7F5;overflow-wrap:break-word;}
.article-content > :first-child{margin-top:0;}
.article-content h2{
  margin:2.2em 0 .8em;
  padding-left:14px;
  border-left:4px solid var(--primary);
  color:var(--text);
  font-size:clamp(1.42rem,2.1vw,1.9rem);
  line-height:1.35;
  letter-spacing:0;
}
.article-content h3{margin:1.8em 0 .6em;color:var(--text);font-size:1.22rem;line-height:1.45;letter-spacing:0;}
.article-content h4{margin:1.5em 0 .5em;color:var(--text);font-size:1.05rem;}
.article-content p{margin:0 0 1.15em;}
.article-content ul,.article-content ol{margin:0 0 1.2em;padding-left:1.45em;}
.article-content li{margin:.4em 0;}
.article-content a{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
.article-content strong{color:#fff;}
.article-content blockquote{
  margin:1.6em 0;padding:18px 20px;border-left:3px solid var(--primary);border-radius:0 14px 14px 0;
  background:rgba(53,242,208,.06);color:#CFE6F4;
}
.article-content img{width:100%;height:auto;margin:1.5em 0;border:1px solid var(--line);border-radius:16px;}
.article-content hr{border:0;border-top:1px solid var(--line);margin:2em 0;}
.article-content pre{max-width:100%;overflow-x:auto;padding:18px;border:1px solid var(--line);border-radius:14px;background:#08111D;color:#CFE6F4;}
.article-content code{font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace;font-size:.92em;}
.article-content table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;margin:1.4em 0;}
.article-content th,.article-content td{min-width:120px;padding:10px 12px;border:1px solid var(--line);text-align:left;}
.article-content th{background:rgba(53,242,208,.07);color:var(--text);}
.article-end{display:flex;flex-wrap:wrap;gap:12px;max-width:760px;margin:36px auto 0;padding-top:24px;border-top:1px solid var(--line);}
.article-sidebar{position:relative;}
.sidebar-sticky{position:sticky;top:32px;display:flex;flex-direction:column;gap:18px;}
.side-card{padding:22px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow);}
.side-card h3{margin-bottom:14px;color:var(--text);font-size:1rem;line-height:1.4;letter-spacing:0;}
.toc{display:grid;gap:6px;margin:0;padding:0;list-style:none;}
.toc a{display:flex;align-items:flex-start;gap:9px;padding:7px 0;color:var(--muted);font-size:.9rem;line-height:1.55;}
.toc a::before{content:"";flex:0 0 6px;width:6px;height:6px;margin-top:.55em;border-radius:50%;background:rgba(53,242,208,.55);}
.toc a:hover{color:var(--primary);}
.mini-list{display:grid;gap:10px;margin:0;padding:0;list-style:none;}
.mini-list a{display:flex;justify-content:space-between;gap:12px;padding-bottom:10px;border-bottom:1px solid rgba(120,220,255,.1);color:var(--muted);font-size:.87rem;line-height:1.6;}
.mini-list li:last-child a{border-bottom:0;padding-bottom:0;}
.mini-list a span{color:var(--primary);flex:0 0 auto;transition:transform var(--ease);}
.mini-list a:hover{color:var(--text);}
.mini-list a:hover span{transform:translateX(3px);}
.consult-card{
  border-color:rgba(93,230,255,.2);
  background:rgba(12,22,38,.62);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
}
.consult-card .mini-label{display:block;margin-bottom:9px;color:var(--primary);font-size:.72rem;font-weight:700;letter-spacing:.08em;}
.consult-card p{margin-bottom:16px;color:var(--muted);font-size:.86rem;line-height:1.75;}
.empty-state{max-width:620px;margin:24px auto;padding:48px 24px;text-align:center;}
.empty-icon{
  display:flex;align-items:center;justify-content:center;width:58px;height:58px;margin:0 auto 18px;
  border-radius:18px;color:var(--amber);font-size:1.5rem;font-weight:800;
  background:rgba(255,184,107,.1);border:1px solid rgba(255,184,107,.28);
}
.empty-state h2{font-size:1.5rem;margin-bottom:10px;letter-spacing:0;}
.empty-state p{color:var(--muted);margin-bottom:24px;}

/* 相关推荐 */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.post-card{
  display:flex;flex-direction:column;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--panel);box-shadow:var(--shadow);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.post-card:hover{transform:translateY(-3px);border-color:rgba(53,242,208,.38);box-shadow:var(--shadow-hover);}
.post-media{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--bg-2);}
.post-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.post-card:hover .post-media img{transform:scale(1.04);}
.post-body{display:flex;flex:1;flex-direction:column;padding:22px;}
.post-tag{align-self:flex-start;margin-bottom:12px;padding:2px 10px;border:1px solid rgba(124,92,255,.32);border-radius:999px;color:#C9BDFF;background:rgba(124,92,255,.12);font-size:.72rem;font-weight:700;}
.post-card h3{margin-bottom:9px;font-size:1.06rem;line-height:1.45;letter-spacing:0;}
.post-card h3 a{color:var(--text);}
.post-card h3 a:hover{color:var(--primary);}
.post-excerpt{color:var(--muted);font-size:.87rem;line-height:1.7;}
.post-link{display:inline-flex;align-items:center;gap:6px;margin-top:auto;padding-top:16px;color:var(--primary);font-size:.86rem;font-weight:700;}
.post-link span{transition:transform var(--ease);}
.post-link:hover span{transform:translateX(4px);}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.faq-item{overflow:hidden;border:1px solid var(--line);border-radius:16px;background:rgba(12,22,38,.45);}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:18px;width:100%;padding:18px 20px;border:0;background:transparent;color:var(--text);font-size:.94rem;font-weight:700;line-height:1.55;text-align:left;transition:background var(--ease),color var(--ease);}
.faq-q:hover{background:rgba(53,242,208,.045);color:var(--primary);}
.faq-icon{flex:0 0 auto;color:var(--primary);font-size:1.3rem;font-weight:400;line-height:1;}
.faq-a{max-height:0;overflow:hidden;padding:0 20px;color:var(--muted);font-size:.88rem;line-height:1.8;transition:max-height .2s ease,padding .2s ease;}
.faq-item.is-open{border-color:rgba(53,242,208,.3);background:rgba(53,242,208,.035);}
.faq-item.is-open .faq-a{max-height:260px;padding-bottom:18px;}

/* CTA */
.cta-panel{
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  padding:clamp(28px,5vw,56px);
  border:1px solid rgba(53,242,208,.24);border-radius:24px;
  background:
    radial-gradient(circle at 88% 10%,rgba(124,92,255,.18),transparent 34%),
    radial-gradient(circle at 12% 100%,rgba(53,242,208,.14),transparent 38%),
    linear-gradient(135deg,#0D1A2D,#09111E);
  box-shadow:0 20px 60px rgba(0,0,0,.35);
}
.cta-panel h2{margin:10px 0 12px;font-size:clamp(1.55rem,2.4vw,2.25rem);line-height:1.3;letter-spacing:0;}
.cta-panel p{max-width:62ch;color:var(--muted);font-size:.96rem;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto;}

/* 页脚 */
.footer{position:relative;margin-top:80px;border-top:1px solid var(--line);background:#070D18;}
.footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(53,242,208,.55),transparent);}
.footer-grid{display:grid;grid-template-columns:1.5fr .8fr .8fr 1.05fr;gap:36px;padding:56px 0 36px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;font-size:1.02rem;}
.footer-brand .brand-mark{width:38px;height:38px;flex-basis:38px;border-radius:12px;font-size:1rem;}
.footer-brand strong{font-weight:700;line-height:1.4;}
.footer-desc{max-width:42ch;color:var(--muted);font-size:.88rem;line-height:1.8;}
.footer h4{margin:4px 0 16px;color:var(--text);font-size:.92rem;font-weight:700;letter-spacing:.02em;}
.footer-links{display:grid;gap:10px;}
.footer-links a{color:var(--muted);font-size:.86rem;}
.footer-links a:hover{color:var(--primary);}
.footer-contact{display:grid;gap:9px;margin:0;padding:0;list-style:none;color:var(--muted);font-size:.84rem;line-height:1.7;}
.footer-contact b{color:var(--text);font-weight:600;}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 0 28px;border-top:1px solid var(--line);color:var(--muted);font-size:.8rem;}
.site-domain{color:rgba(159,179,200,.72);}

/* 响应式 */
@media (min-width:1440px){
  .container{width:min(calc(100% - 72px),var(--container));}
}
@media (max-width:1200px){
  :root{--sidebar:220px;}
  .sidebar{padding-left:14px;padding-right:14px;}
  .brand-text{font-size:.9rem;}
  .article-heading-grid{grid-template-columns:minmax(0,1fr) 290px;gap:28px;}
  .article-layout{grid-template-columns:minmax(0,1fr) 260px;gap:28px;}
}
@media (max-width:1100px){
  .article-layout{grid-template-columns:1fr;}
  .article-sidebar{order:2;}
  .sidebar-sticky{position:static;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));}
  .consult-card{grid-column:1/-1;}
}
@media (max-width:991px){
  .topbar{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    position:fixed;top:0;left:0;right:0;z-index:70;height:60px;padding:0 18px;
    border-bottom:1px solid var(--line);background:rgba(7,13,24,.92);
    backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  }
  .topbar-brand{display:block;max-width:calc(100% - 62px);overflow:hidden;color:var(--text);font-size:.94rem;font-weight:700;line-height:1.3;white-space:nowrap;text-overflow:ellipsis;}
  .sidebar{width:280px;padding:82px 18px 24px;transform:translateX(-100%);transition:transform .25s ease;box-shadow:22px 0 60px rgba(0,0,0,.45);}
  .sidebar.is-open{transform:translateX(0);}
  .main{margin-left:0;padding-top:60px;}
  .drawer-backdrop[hidden]{display:none;}
  body.drawer-open{overflow:hidden;}
  .sidebar-help{margin-top:10px;}
  .article-hero{padding-top:42px;}
  .article-heading-grid{grid-template-columns:1fr;align-items:start;}
  .hero-side-card{max-width:560px;}
  .section{padding:62px 0;}
  .section-head{align-items:flex-start;flex-direction:column;gap:14px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 24px;}
  .cta-panel{align-items:flex-start;flex-direction:column;}
}
@media (max-width:768px){
  .container{width:min(calc(100% - 36px),var(--container));}
  .article-hero{padding:34px 0 44px;}
  .breadcrumbs{margin-bottom:22px;}
  .article-heading h1{max-width:none;font-size:clamp(1.9rem,7vw,2.6rem);}
  .article-lead{font-size:.95rem;}
  .article-meta{font-size:.8rem;margin-top:20px;}
  .article-body{padding:26px 20px;border-radius:18px;}
  .article-content{font-size:.98rem;line-height:1.86;}
  .article-content h2{margin-top:1.8em;}
  .article-end{flex-direction:column;}
  .article-end .btn{width:100%;}
  .sidebar-sticky{grid-template-columns:1fr;}
  .related-grid{grid-template-columns:1fr;}
  .faq-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-top:44px;}
  .footer-bottom{align-items:flex-start;flex-direction:column;gap:8px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .section{padding:56px 0;}
}
@media (max-width:520px){
  .container{width:calc(100% - 32px);}
  .topbar{padding:0 14px;}
  .topbar-brand{font-size:.88rem;}
  .sidebar{width:286px;}
  .article-side-stats{grid-template-columns:1fr;}
  .article-body{padding:22px 16px;}
  .post-body{padding:20px;}
  .side-card{padding:18px;}
  .hero-side-card{padding:20px;}
  .btn{min-height:48px;padding-left:18px;padding-right:18px;}
  .faq-q{padding:16px;font-size:.9rem;}
  .faq-a{padding-left:16px;padding-right:16px;}
  .cta-panel{padding:26px 20px;border-radius:20px;}
  .footer-bottom{font-size:.76rem;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important;}
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
:root{
  --bg:#060A12;
  --bg-2:#0A111F;
  --panel:#0F1A2B;
  --panel-2:#101D30;
  --primary:#35F2D0;
  --primary-soft:rgba(53,242,208,.10);
  --purple:#7C5CFF;
  --warm:#FFB86B;
  --text:#EAF6FF;
  --muted:#9FB3C8;
  --border:rgba(120,220,255,.16);
  --ok:#4ADE80;
  --err:#FF6B81;
  --radius:20px;
  --radius-sm:12px;
  --shadow:0 12px 40px rgba(0,0,0,.35);
  --shadow-hover:0 16px 50px rgba(53,242,208,.12);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --sidebar-w:248px;
}

/* ========== 基础重置 ========== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(1200px 620px at 82% -12%, rgba(53,242,208,.09), transparent 62%),
    radial-gradient(900px 520px at 6% 0%, rgba(124,92,255,.12), transparent 60%);
  background-attachment:fixed;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.28;letter-spacing:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:#7ff8e2;}
img{display:block;max-width:100%;height:auto;}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
input,textarea,select{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:8px;}
::selection{background:rgba(53,242,208,.28);color:#04121A;}

/* 滚动条 */
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:#070D18;}
::-webkit-scrollbar-thumb{background:rgba(120,220,255,.22);border-radius:999px;border:2px solid #070D18;}
::-webkit-scrollbar-thumb:hover{background:rgba(53,242,208,.45);}

/* ========== 容器与主区 ========== */
.container{width:100%;max-width:1320px;margin:0 auto;padding:0 32px;}
.app-main{margin-left:var(--sidebar-w);min-height:100vh;}

/* ========== 侧边导航 ========== */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  display:flex;flex-direction:column;gap:20px;
  padding:26px 18px 22px;
  background:linear-gradient(180deg,#0A111F 0%,#070D18 100%);
  border-right:1px solid var(--border);
  z-index:100;
  overflow-y:auto;
}
.sidebar-brand{
  display:flex;align-items:center;gap:12px;
  padding:4px 4px 18px;
  border-bottom:1px solid var(--border);
  color:var(--text);
}
.brand-mark{
  width:38px;height:38px;flex:none;display:grid;place-items:center;
  border-radius:12px;
  background:linear-gradient(140deg,var(--primary),var(--purple));
  color:#04121A;font-weight:700;font-size:18px;
  box-shadow:0 0 22px rgba(53,242,208,.35);
}
.brand-name{display:flex;flex-direction:column;gap:2px;font-size:14px;font-weight:700;line-height:1.4;color:var(--text);}
.brand-name em{font-style:normal;font-size:10.5px;letter-spacing:.2em;color:var(--muted);font-weight:500;}
.nav{display:flex;flex-direction:column;gap:4px;}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;
  min-height:44px;padding:0 14px;border-radius:12px;
  color:var(--muted);font-size:14.5px;font-weight:500;
  transition:background .2s ease,color .2s ease;
}
.nav-item:hover{background:rgba(53,242,208,.06);color:var(--text);}
.nav-item.active{background:rgba(53,242,208,.10);color:var(--text);font-weight:600;}
.nav-item.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:3px;
  background:var(--primary);box-shadow:0 0 14px rgba(53,242,208,.85);
}
.nav-ico{
  width:8px;height:8px;flex:none;border-radius:2px;
  background:rgba(159,179,200,.45);
  transition:background .2s ease,box-shadow .2s ease;
}
.nav-item:hover .nav-ico{background:rgba(53,242,208,.6);}
.nav-item.active .nav-ico{background:var(--primary);box-shadow:0 0 12px rgba(53,242,208,.8);}
.sidebar-consult{
  margin-top:auto;padding:18px;border-radius:16px;
  background:rgba(12,22,38,.62);
  border:1px solid rgba(93,230,255,.18);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
}
.sidebar-consult p{font-size:14px;font-weight:600;color:var(--text);}
.sidebar-consult span{display:block;margin:6px 0 14px;font-size:12.5px;line-height:1.7;color:var(--muted);}

/* ========== 移动端顶栏 ========== */
.topbar{display:none;}
.topbar-brand{font-size:15px;font-weight:700;color:var(--text);letter-spacing:0;}
.hamburger{
  width:44px;height:44px;display:grid;place-items:center;
  border-radius:12px;border:1px solid var(--border);
  background:rgba(53,242,208,.05);
  transition:background .2s ease,border-color .2s ease;
}
.hamburger:hover{background:rgba(53,242,208,.12);border-color:rgba(53,242,208,.4);}
.hamburger span{position:relative;display:block;width:20px;height:2px;border-radius:2px;background:var(--text);}
.hamburger span::before,.hamburger span::after{
  content:"";position:absolute;left:0;width:20px;height:2px;border-radius:2px;background:var(--text);
  transition:transform .2s ease;
}
.hamburger span::before{top:-6px;}
.hamburger span::after{top:6px;}
.drawer-mask{
  position:fixed;inset:0;z-index:99;
  background:rgba(3,7,14,.72);
  opacity:0;visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ========== 按钮 ========== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:999px;
  font-size:15px;font-weight:600;border:1px solid transparent;
  white-space:nowrap;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn:active{transform:translateY(1px);}
.btn-primary{
  background:linear-gradient(135deg,#35F2D0,#1FCFC5);
  color:#04121A;
  box-shadow:0 0 24px rgba(53,242,208,.35);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 34px rgba(53,242,208,.55);color:#04121A;}
.btn-outline{
  border-color:rgba(120,220,255,.28);
  background:rgba(12,22,38,.5);
  color:var(--text);
}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);background:rgba(53,242,208,.06);}
.btn-ghost{border-color:rgba(53,242,208,.32);color:var(--primary);background:transparent;}
.btn-ghost:hover{background:rgba(53,242,208,.10);color:var(--primary);}
.btn-sm{min-height:38px;padding:0 18px;font-size:13.5px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;pointer-events:none;}

/* ========== 徽章 / 标签 ========== */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  color:var(--primary);
  background:rgba(53,242,208,.10);
  border:1px solid rgba(53,242,208,.28);
}
.badge-purple{color:#C3B4FF;background:rgba(124,92,255,.14);border-color:rgba(124,92,255,.35);}

/* ========== 首屏 ========== */
.page-hero{
  position:relative;overflow:hidden;
  padding:84px 0 72px;
  background-image:
    linear-gradient(180deg,rgba(6,10,18,.58) 0%,rgba(6,10,18,.86) 62%,rgba(6,10,18,.97) 100%),
    url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
  border-bottom:1px solid var(--border);
}
.page-hero::after{
  content:"";position:absolute;right:-160px;top:-120px;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(53,242,208,.20),transparent 68%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:22px;font-size:13px;color:var(--muted);}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb span.sep{opacity:.55;}
.page-hero h1{
  margin-top:14px;
  font-size:clamp(2.4rem,5vw,4rem);
  line-height:1.15;
  max-width:15em;
  background:linear-gradient(100deg,#EAF6FF 34%,#35F2D0 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
  color:#EAF6FF;
}
.hero-lead{max-width:60ch;margin-top:20px;font-size:16.5px;color:var(--muted);}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:16px;margin-top:42px;}
.hero-stats > div{
  min-width:150px;padding:16px 22px;border-radius:16px;
  background:rgba(12,22,38,.62);
  border:1px solid rgba(93,230,255,.18);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
}
.hero-stats b{display:block;font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:1.35rem;color:var(--primary);line-height:1.3;}
.hero-stats span{font-size:12.5px;color:var(--muted);}

/* ========== 通用板块 ========== */
.section{padding:76px 0;}
.section-head{max-width:760px;margin-bottom:36px;}
.eyebrow{display:inline-block;margin-bottom:12px;font-size:12.5px;font-weight:600;letter-spacing:.14em;color:var(--purple);}
.section-head h2{font-size:clamp(1.6rem,2.4vw,2.25rem);}
.section-sub{margin-top:14px;font-size:15.5px;color:var(--muted);}

/* ========== 筛选条 ========== */
.filter-strip{padding:36px 0 0;}
.filter-bar{
  display:flex;align-items:center;gap:20px;flex-wrap:wrap;
  padding:18px 22px;border-radius:16px;
  background:var(--panel);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
}
.filter-label{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--muted);}
.filter-tags{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  padding:8px 16px;border-radius:999px;
  font-size:13.5px;color:var(--muted);
  border:1px solid var(--border);
  background:rgba(255,255,255,.02);
  transition:color .2s ease,border-color .2s ease,background .2s ease,box-shadow .2s ease;
}
.tag:hover{color:var(--text);border-color:rgba(120,220,255,.38);}
.tag.is-active{
  background:var(--primary);color:#04121A;font-weight:600;
  border-color:var(--primary);
  box-shadow:0 0 18px rgba(53,242,208,.30);
}

/* ========== 权益阶梯 ========== */
.ladder{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.ladder::before{
  content:"";position:absolute;top:27px;left:12%;right:12%;height:2px;
  background:linear-gradient(90deg,rgba(53,242,208,0),var(--primary),var(--purple),rgba(124,92,255,0));
  opacity:.55;
}
.ladder-node{position:relative;padding-top:58px;}
.ladder-dot{
  position:absolute;top:20px;left:50%;transform:translateX(-50%);
  width:14px;height:14px;border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 0 5px rgba(53,242,208,.10),0 0 20px rgba(53,242,208,.8);
}
.ladder-node:nth-child(2) .ladder-dot{background:#A18EFF;box-shadow:0 0 0 5px rgba(124,92,255,.12),0 0 20px rgba(124,92,255,.8);}
.ladder-node:nth-child(3) .ladder-dot{background:var(--warm);box-shadow:0 0 0 5px rgba(255,184,107,.12),0 0 20px rgba(255,184,107,.75);}
.ladder-card{
  display:flex;flex-direction:column;height:100%;
  padding:26px;border-radius:var(--radius);
  background:var(--panel);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.ladder-card:hover{transform:translateY(-4px);border-color:rgba(53,242,208,.4);box-shadow:var(--shadow-hover);}
.ladder-step{font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--purple);}
.ladder-card h3{margin:10px 0 10px;font-size:1.2rem;}
.ladder-card p{font-size:14.5px;color:var(--muted);}
.ladder-cond{
  margin:16px 0 20px;padding:12px 14px;
  font-size:13px;line-height:1.7;color:var(--muted);
  border-radius:12px;
  background:rgba(53,242,208,.05);
  border-left:3px solid var(--primary);
}
.ladder-card .btn{margin-top:auto;}

/* ========== 套餐对比 ========== */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch;}
.plan-card{
  position:relative;display:flex;flex-direction:column;
  padding:30px 26px 26px;border-radius:var(--radius);
  background:var(--panel);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.plan-card:hover{transform:translateY(-4px);border-color:rgba(120,220,255,.34);box-shadow:var(--shadow-hover);}
.plan-card.is-featured{
  border-color:rgba(53,242,208,.5);
  background:linear-gradient(180deg,rgba(53,242,208,.08) 0%,rgba(15,26,43,1) 46%);
  box-shadow:0 0 0 1px rgba(53,242,208,.16),0 16px 50px rgba(53,242,208,.14);
}
.plan-badge{
  position:absolute;top:-13px;left:26px;
  padding:4px 14px;border-radius:999px;
  background:var(--primary);color:#04121A;
  font-size:12px;font-weight:700;letter-spacing:.04em;
  box-shadow:0 0 18px rgba(53,242,208,.45);
}
.plan-card h3{font-size:1.18rem;}
.plan-desc{margin-top:8px;font-size:13.5px;color:var(--muted);min-height:46px;}
.plan-price{
  display:flex;align-items:baseline;gap:5px;
  margin:18px 0 4px;
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:2.6rem;font-weight:700;color:var(--text);line-height:1.1;
}
.plan-price .currency{font-size:1.25rem;color:var(--primary);}
.plan-price .period{font-family:var(--font);font-size:13px;font-weight:400;color:var(--muted);}
.plan-list{display:flex;flex-direction:column;gap:12px;margin:22px 0 26px;font-size:14px;color:var(--muted);}
.plan-list li{display:flex;align-items:flex-start;gap:10px;}
.plan-list li::before{
  content:"✓";flex:none;
  width:18px;height:18px;margin-top:4px;
  display:grid;place-items:center;
  border-radius:50%;
  background:rgba(53,242,208,.14);
  color:var(--primary);
  font-size:11px;line-height:1;
}
.plan-card .btn{margin-top:auto;}

/* ========== 限时入口 ========== */
.limit-wrap{padding:0 0 76px;}
.limit-inner{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:26px 32px;border-radius:var(--radius);
  background:rgba(12,22,38,.62);
  border:1px solid rgba(255,184,107,.30);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:0 0 44px rgba(255,184,107,.08);
}
.limit-text .eyebrow{color:var(--warm);margin-bottom:6px;}
.limit-text h3{font-size:1.25rem;}
.limit-text p{margin-top:6px;font-size:13.5px;color:var(--muted);}
.countdown{display:flex;gap:10px;}
.cd-block{
  min-width:66px;padding:10px 8px;text-align:center;
  border-radius:12px;
  background:rgba(255,184,107,.08);
  border:1px solid rgba(255,184,107,.26);
}
.cd-block b{
  display:block;
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:1.5rem;line-height:1.2;color:var(--warm);
}
.cd-block span{font-size:11.5px;color:var(--muted);}

/* ========== FAQ ========== */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.faq-item{
  border-radius:16px;overflow:hidden;
  background:var(--panel);
  border:1px solid var(--border);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(120,220,255,.3);}
.faq-item.open{border-color:rgba(53,242,208,.38);box-shadow:0 10px 34px rgba(53,242,208,.08);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;text-align:left;
  font-size:15px;font-weight:700;color:var(--text);
}
.faq-icon{
  position:relative;flex:none;width:20px;height:20px;border-radius:6px;
  background:rgba(53,242,208,.10);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;
  transform:translate(-50%,-50%);
  background:var(--primary);border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}
.faq-icon::before{width:10px;height:1.5px;}
.faq-icon::after{width:1.5px;height:10px;}
.faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .2s ease;}
.faq-item.open .faq-a{grid-template-rows:1fr;}
.faq-a > div{overflow:hidden;}
.faq-a p{padding:0 22px 20px;font-size:14.5px;color:var(--muted);}

/* ========== 收口 CTA ========== */
.cta-band{padding:0 0 88px;}
.cta-inner{
  position:relative;overflow:hidden;
  padding:52px 44px;border-radius:24px;
  border:1px solid var(--border);
  background-image:
    linear-gradient(120deg,rgba(6,10,18,.90),rgba(6,10,18,.74)),
    url("/assets/images/backpic/back-3.png");
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
}
.cta-inner > *{position:relative;z-index:2;}
.cta-inner::after{
  content:"";position:absolute;left:-120px;bottom:-160px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(124,92,255,.22),transparent 68%);
  z-index:1;pointer-events:none;
}
.cta-inner h2{max-width:20em;font-size:clamp(1.6rem,2.4vw,2.25rem);}
.cta-inner p{margin-top:14px;max-width:60ch;font-size:15.5px;color:var(--muted);}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}

/* ========== 页脚 ========== */
.footer{
  position:relative;
  padding:64px 0 28px;
  border-top:1px solid var(--border);
  background:linear-gradient(180deg,rgba(15,26,43,.55),rgba(6,10,18,1));
}
.footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,242,208,.6),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:15px;}
.footer-brand strong{font-weight:700;color:var(--text);}
.footer-desc{margin-top:16px;max-width:34ch;font-size:14px;color:var(--muted);}
.footer h4{margin-bottom:16px;font-size:14px;font-weight:600;color:var(--text);}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:var(--muted);}
.footer-links a:hover{color:var(--primary);}
.footer-contact li{font-size:13.5px;line-height:1.95;color:var(--muted);}
.footer-contact b{font-weight:600;color:var(--text);}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;
  margin-top:48px;padding-top:22px;
  border-top:1px solid var(--border);
  font-size:13px;color:var(--muted);
}
.site-domain{color:rgba(159,179,200,.75);}

/* ========== 响应式 ========== */
@media (max-width:1200px){
  :root{--sidebar-w:220px;}
  .container{padding:0 26px;}
}
@media (max-width:992px){
  .topbar{
    display:flex;align-items:center;justify-content:space-between;
    position:fixed;top:0;left:0;right:0;height:60px;
    padding:0 18px;
    background:rgba(6,10,18,.92);
    border-bottom:1px solid var(--border);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    z-index:101;
  }
  .sidebar{
    width:280px;
    transform:translateX(-100%);
    transition:transform .25s ease;
    box-shadow:0 0 60px rgba(0,0,0,.6);
    z-index:102;
  }
  .sidebar.is-open{transform:translateX(0);}
  .app-main{margin-left:0;padding-top:60px;}
  .page-hero{padding:56px 0 52px;}
  .section{padding:56px 0;}
  .ladder{grid-template-columns:1fr;gap:18px;}
  .ladder::before{display:none;}
  .ladder-node{padding-top:0;padding-left:44px;}
  .ladder-dot{left:14px;top:26px;transform:none;}
  .plans{grid-template-columns:1fr;gap:22px;}
  .plan-desc{min-height:0;}
  .faq-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .limit-wrap{padding-bottom:56px;}
  .cta-band{padding-bottom:60px;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .section{padding:44px 0;}
  .section-head{margin-bottom:28px;}
  .page-hero h1{max-width:100%;}
  .hero-lead{font-size:15.5px;}
  .hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
  .hero-stats > div{min-width:0;padding:14px 16px;}
  .filter-bar{padding:16px;gap:14px;}
  .limit-inner{padding:22px;}
  .cta-inner{padding:34px 22px;}
  .footer{padding:48px 0 24px;}
  .footer-grid{grid-template-columns:1fr;}
}
@media (max-width:480px){
  .hero-actions .btn,.cta-actions .btn{width:100%;}
  .countdown{width:100%;justify-content:space-between;}
  .cd-block{flex:1;min-width:0;padding:8px 4px;}
  .cd-block b{font-size:1.25rem;}
  .plan-price{font-size:2.2rem;}
  .limit-text h3{font-size:1.12rem;}
  .faq-q{padding:16px 18px;font-size:14.5px;}
  .faq-a p{padding:0 18px 18px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category2 */
:root{
  --bg:#060A12;
  --bg-2:#0A111F;
  --panel:#0F1A2B;
  --glass:rgba(12,22,38,.62);
  --primary:#35F2D0;
  --primary-soft:rgba(53,242,208,.14);
  --violet:#7C5CFF;
  --violet-soft:rgba(124,92,255,.16);
  --warm:#FFB86B;
  --text:#EAF6FF;
  --muted:#9FB3C8;
  --border:rgba(120,220,255,.16);
  --border-strong:rgba(53,242,208,.42);
  --success:#4ADE80;
  --danger:#FF6B81;
  --radius:20px;
  --radius-sm:12px;
  --radius-lg:26px;
  --shadow:0 12px 40px rgba(0,0,0,.35);
  --shadow-hover:0 16px 50px rgba(53,242,208,.12);
  --sidebar-w:248px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  background:
    radial-gradient(900px 520px at 86% -10%, rgba(124,92,255,.16), transparent 62%),
    radial-gradient(760px 460px at 4% 2%, rgba(53,242,208,.10), transparent 60%),
    linear-gradient(180deg,#060A12 0%,#08101C 48%,#060A12 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--primary);text-decoration:none;transition:color .2s ease}
a:hover{color:#7CFFE6}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:0;line-height:1.32}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
input,select,textarea{font-family:inherit;font-size:15px}
::selection{background:rgba(53,242,208,.28);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#070C15}
::-webkit-scrollbar-thumb{background:rgba(53,242,208,.24);border-radius:999px;border:2px solid #070C15}
::-webkit-scrollbar-thumb:hover{background:rgba(53,242,208,.42)}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}

.skip-link{position:absolute;left:-9999px;top:0;z-index:200;padding:12px 20px;background:var(--primary);color:#04211C;font-weight:600;border-radius:0 0 12px 0}
.skip-link:focus{left:0}

.container{width:100%;max-width:1320px;margin:0 auto;padding:0 32px}

/* ---------- 移动端顶部栏 ---------- */
.topbar{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:60px;
  z-index:70;
  align-items:center;
  justify-content:space-between;
  padding:0 16px;
  background:rgba(6,10,18,.88);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--border);
}
.topbar-brand{
  font-size:16px;
  font-weight:700;
  color:var(--text);
  letter-spacing:.01em;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.topbar-brand:hover{color:var(--primary)}
.hamburger{
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  background:transparent;
  border:1px solid var(--border);
  border-radius:12px;
  cursor:pointer;
  transition:border-color .2s,background .2s;
}
.hamburger:hover{border-color:var(--border-strong);background:rgba(53,242,208,.06)}
.hamburger span{display:block;position:relative;width:18px;height:2px;background:var(--text);border-radius:2px}
.hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px}
.hamburger span::before{top:-6px}
.hamburger span::after{top:6px}

/* ---------- 左侧 App Shell ---------- */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  z-index:60;
  display:flex;
  flex-direction:column;
  gap:22px;
  padding:24px 18px;
  overflow-y:auto;
  background:linear-gradient(180deg,#08101C 0%,#060A12 100%);
  border-right:1px solid var(--border);
}
.sidebar-brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding:4px 4px 16px;
  border-bottom:1px solid var(--border);
  color:var(--text);
}
.sidebar-brand:hover{color:var(--text)}
.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex:none;
  width:36px;height:36px;
  border-radius:12px;
  font-size:16px;
  font-weight:700;
  color:#04120F;
  background:linear-gradient(135deg,#35F2D0 0%,#7C5CFF 100%);
  box-shadow:0 0 18px rgba(53,242,208,.35);
}
.brand-name{display:block;font-size:15px;font-weight:700;line-height:1.35;letter-spacing:0}
.brand-sub{display:block;font-size:10px;font-weight:600;letter-spacing:.2em;color:var(--muted);text-transform:uppercase}
.nav{display:flex;flex-direction:column;gap:6px}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  gap:11px;
  height:44px;
  padding:0 14px;
  border-radius:12px;
  font-size:15px;
  font-weight:500;
  color:var(--muted);
  transition:background .2s ease,color .2s ease,box-shadow .2s ease;
}
.nav-item i{font-size:14px;width:18px;text-align:center;opacity:.9}
.nav-item:hover{color:var(--text);background:rgba(53,242,208,.06)}
.nav-item:active{transform:translateY(1px)}
.nav-item.is-active{
  color:var(--text);
  background:linear-gradient(90deg,rgba(53,242,208,.16),rgba(53,242,208,.04));
  box-shadow:inset 0 0 0 1px rgba(53,242,208,.2);
}
.nav-item.is-active::before{
  content:"";
  position:absolute;
  left:0;top:10px;bottom:10px;
  width:3px;
  border-radius:3px;
  background:var(--primary);
  box-shadow:0 0 14px rgba(53,242,208,.9);
}
.nav-item.is-active i{color:var(--primary)}
.sidebar-card{
  margin-top:auto;
  padding:18px;
  border-radius:18px;
  background:var(--glass);
  border:1px solid rgba(93,230,255,.18);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow);
  position:relative;
  overflow:hidden;
}
.sidebar-card::before{
  content:"";
  position:absolute;top:0;left:16px;right:16px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,242,208,.7),transparent);
}
.sidebar-card h3{font-size:15px;margin-bottom:6px}
.sidebar-card p{font-size:13px;line-height:1.7;color:var(--muted);margin-bottom:14px}
.sidebar-card .btn{width:100%;height:42px;font-size:14px}
.backdrop{
  position:fixed;
  inset:0;
  z-index:55;
  background:rgba(3,7,13,.68);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;
}
.backdrop.is-open{opacity:1;visibility:visible}

.app-main{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
main{flex:1 0 auto}

/* ---------- 按钮 / 标签 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  cursor:pointer;
  text-decoration:none;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease,filter .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#35F2D0 0%,#22C9AE 100%);
  color:#04211C;
  box-shadow:0 0 24px rgba(53,242,208,.35);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 0 34px rgba(53,242,208,.52);color:#04211C}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 16px rgba(53,242,208,.4)}
.btn-ghost{
  background:rgba(15,26,43,.62);
  border-color:var(--border);
  color:var(--text);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.btn-ghost:hover{border-color:var(--border-strong);color:var(--primary);background:rgba(53,242,208,.07)}
.btn-ghost:active{transform:translateY(1px)}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;box-shadow:none}
.btn-sm{height:40px;padding:0 18px;font-size:14px}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.04em;
  border:1px solid transparent;
  white-space:nowrap;
}
.tag-primary{background:rgba(53,242,208,.14);color:var(--primary);border-color:rgba(53,242,208,.28)}
.tag-violet{background:var(--violet-soft);color:#C0AEFF;border-color:rgba(124,92,255,.32)}
.tag-warm{background:rgba(255,184,107,.14);color:var(--warm);border-color:rgba(255,184,107,.3)}
.tag-muted{background:rgba(159,179,200,.1);color:var(--muted);border-color:rgba(159,179,200,.2)}

/* ---------- 页头 Hero ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:76px 0 64px;
  border-bottom:1px solid var(--border);
}
.page-hero .hero-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  opacity:.34;
  filter:saturate(115%);
  transform:scale(1.02);
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(100deg,rgba(6,10,18,.95) 0%,rgba(6,10,18,.78) 52%,rgba(10,17,31,.92) 100%);
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:20px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:var(--text)}
.page-hero h1{
  font-size:clamp(1.95rem,3.6vw,3rem);
  line-height:1.26;
  margin:18px 0 0;
  max-width:22em;
}
.page-hero h1 em{font-style:normal;color:var(--primary)}
.hero-lede{
  margin-top:18px;
  max-width:46em;
  font-size:16px;
  color:var(--muted);
  line-height:1.85;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:14px;
  margin-top:40px;
  max-width:820px;
}
.hero-stat{
  padding:16px 18px;
  border-radius:16px;
  background:rgba(12,22,38,.62);
  border:1px solid var(--border);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.hero-stat b{
  display:block;
  font-family:var(--mono);
  font-size:22px;
  font-weight:700;
  color:var(--primary);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.hero-stat span{display:block;font-size:12.5px;color:var(--muted);margin-top:2px}

/* ---------- 板块通用 ---------- */
.section{padding:80px 0}
.section-tight{padding:64px 0}
.section-head{max-width:720px;margin-bottom:36px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--primary);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--primary);box-shadow:0 0 10px rgba(53,242,208,.8)}
.section-head h2{
  font-size:clamp(1.55rem,2.4vw,2.2rem);
  margin-top:14px;
  line-height:1.34;
}
.section-head p{margin-top:14px;color:var(--muted);font-size:15.5px;line-height:1.85}

/* ---------- 目录 + 图文长列表 ---------- */
.layout-split{
  display:grid;
  grid-template-columns:264px minmax(0,1fr);
  gap:40px;
  align-items:start;
}
.toc{
  position:sticky;
  top:28px;
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:22px;
  border-radius:var(--radius);
  background:var(--panel);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
}
.toc-title{
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--muted);
  text-transform:uppercase;
  margin-bottom:6px;
}
.toc a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:10px 12px;
  border-radius:10px;
  font-size:14.5px;
  color:var(--muted);
  border:1px solid transparent;
  transition:background .2s,color .2s,border-color .2s;
}
.toc a::after{content:"→";opacity:0;transform:translateX(-4px);transition:opacity .2s,transform .2s;color:var(--primary)}
.toc a:hover{background:rgba(53,242,208,.07);color:var(--text);border-color:rgba(53,242,208,.2)}
.toc a:hover::after{opacity:1;transform:translateX(0)}
.toc-card{
  margin-top:14px;
  padding:16px;
  border-radius:16px;
  background:var(--glass);
  border:1px solid rgba(93,230,255,.18);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
}
.toc-card p{font-size:13px;color:var(--muted);line-height:1.7;margin-bottom:12px}
.toc-card .btn{width:100%;height:40px;font-size:14px}

.long-list{display:flex;flex-direction:column;gap:20px}
.long-item{
  display:grid;
  grid-template-columns:228px minmax(0,1fr);
  gap:24px;
  padding:22px;
  border-radius:var(--radius);
  background:var(--panel);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.long-item:hover{
  border-color:var(--border-strong);
  box-shadow:var(--shadow-hover);
  transform:translateY(-2px);
}
.long-thumb{
  border-radius:14px;
  overflow:hidden;
  background:#0B1524;
  border:1px solid var(--border);
  aspect-ratio:16/10;
}
.long-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.long-item:hover .long-thumb img{transform:scale(1.04)}
.long-body{display:flex;flex-direction:column;min-width:0}
.long-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:10px}
.long-time{font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.dot-sep{width:4px;height:4px;border-radius:50%;background:rgba(159,179,200,.45)}
.long-body h3{font-size:1.2rem;margin-bottom:8px;line-height:1.4}
.long-body p{font-size:14.5px;color:var(--muted);line-height:1.8}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-top:14px;
  font-size:14px;
  font-weight:600;
  color:var(--primary);
  align-self:flex-start;
}
.link-arrow span{transition:transform .2s ease}
.link-arrow:hover span{transform:translateX(4px)}

/* ---------- 阅读体验三要点 ---------- */
.point-list{display:flex;flex-direction:column;gap:14px}
.point{
  display:grid;
  grid-template-columns:64px minmax(0,1fr);
  gap:20px;
  align-items:start;
  padding:24px 26px;
  border-radius:var(--radius);
  background:linear-gradient(120deg,rgba(15,26,43,.96),rgba(11,21,36,.9));
  border:1px solid var(--border);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.point:hover{border-color:var(--border-strong);box-shadow:var(--shadow-hover)}
.point-num{
  font-family:var(--mono);
  font-size:24px;
  font-weight:700;
  color:var(--primary);
  line-height:1.2;
  font-variant-numeric:tabular-nums;
  text-shadow:0 0 18px rgba(53,242,208,.5);
}
.point h3{font-size:1.15rem;margin-bottom:6px}
.point p{font-size:14.5px;color:var(--muted);line-height:1.8}

/* ---------- 时间线 ---------- */
.timeline{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
  position:relative;
  margin-top:8px;
}
.timeline::before{
  content:"";
  position:absolute;
  top:15px;left:6%;right:6%;
  height:2px;
  background:linear-gradient(90deg,rgba(53,242,208,.05),rgba(53,242,208,.65),rgba(124,92,255,.55),rgba(53,242,208,.05));
}
.tl-node{position:relative;padding-top:46px}
.tl-node::before{
  content:"";
  position:absolute;
  top:8px;left:0;
  width:16px;height:16px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 0 5px rgba(53,242,208,.14),0 0 20px rgba(53,242,208,.7);
}
.tl-node h3{font-size:1.05rem;margin-bottom:6px}
.tl-node p{font-size:14px;color:var(--muted);line-height:1.75}
.tl-node .tl-when{
  display:inline-block;
  font-family:var(--mono);
  font-size:12.5px;
  color:var(--warm);
  margin-bottom:6px;
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}

/* ---------- 双栏图文 ---------- */
.split-media{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  gap:44px;
  align-items:center;
}
.split-figure{
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  background:#0B1524;
  aspect-ratio:4/3;
}
.split-figure img{width:100%;height:100%;object-fit:cover}
.check-list{display:flex;flex-direction:column;gap:16px;margin-top:24px}
.check-item{display:grid;grid-template-columns:26px minmax(0,1fr);gap:14px;align-items:start}
.check-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;border-radius:9px;
  background:rgba(53,242,208,.14);
  border:1px solid rgba(53,242,208,.3);
  color:var(--primary);
  font-size:13px;
  margin-top:3px;
}
.check-item strong{display:block;font-size:15.5px;margin-bottom:4px}
.check-item p{font-size:14px;color:var(--muted);line-height:1.75}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.faq-item{
  border-radius:16px;
  background:var(--panel);
  border:1px solid var(--border);
  padding:0 22px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(53,242,208,.28)}
.faq-item[open]{border-color:var(--border-strong);box-shadow:var(--shadow-hover)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  position:relative;
  padding:18px 34px 18px 0;
  font-size:15.5px;
  font-weight:600;
  line-height:1.6;
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--primary)}
.faq-item summary::after{
  content:"+";
  position:absolute;
  right:0;top:50%;
  transform:translateY(-50%);
  font-size:20px;
  line-height:1;
  font-weight:400;
  color:var(--primary);
  transition:transform .2s ease;
}
.faq-item[open] summary::after{content:"−"}
.faq-item .faq-answer{
  padding:0 0 20px;
  font-size:14.5px;
  color:var(--muted);
  line-height:1.85;
  animation:fadeIn .2s ease;
}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ---------- CTA + 表单 ---------- */
.cta-band{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);
  gap:44px;
  padding:44px;
  border-radius:var(--radius-lg);
  background:
    radial-gradient(600px 320px at 12% 0%, rgba(53,242,208,.14), transparent 62%),
    linear-gradient(140deg,rgba(15,26,43,.96),rgba(9,16,28,.96));
  border:1px solid var(--border);
  box-shadow:var(--shadow);
}
.cta-copy h2{font-size:clamp(1.5rem,2.3vw,2rem);line-height:1.34;margin-top:14px}
.cta-copy p{margin-top:16px;color:var(--muted);font-size:15px;line-height:1.85}
.cta-points{display:flex;flex-direction:column;gap:12px;margin-top:26px}
.cta-points li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:14.5px;color:var(--text);
}
.cta-points li::before{
  content:"";
  flex:none;
  width:7px;height:7px;border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 10px rgba(53,242,208,.8);
  margin-top:9px;
}

.form-card{
  padding:26px;
  border-radius:var(--radius);
  background:rgba(10,17,31,.82);
  border:1px solid rgba(93,230,255,.18);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
}
.form-alert{
  display:none;
  margin-bottom:16px;
  padding:12px 16px;
  border-radius:12px;
  font-size:14px;
  line-height:1.7;
  border:1px solid transparent;
}
.form-alert.is-show{display:block}
.form-alert.is-success{background:rgba(74,222,128,.1);border-color:rgba(74,222,128,.4);color:#9BF0BE}
.form-alert.is-error{background:rgba(255,107,129,.1);border-color:rgba(255,107,129,.4);color:#FFB0BB}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.field{display:flex;flex-direction:column;gap:7px;min-width:0}
.field-full{grid-column:1/-1}
.field label{font-size:13.5px;font-weight:600;color:var(--text)}
.field label .req{color:var(--warm);margin-left:2px}
.field input,.field select,.field textarea{
  width:100%;
  padding:12px 14px;
  border-radius:12px;
  background:#08111D;
  border:1px solid var(--border);
  color:var(--text);
  line-height:1.6;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
  appearance:none;
}
.field select{
  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;
  padding-right:40px;
}
.field textarea{resize:vertical;min-height:104px}
.field input::placeholder,.field textarea::placeholder{color:rgba(159,179,200,.62)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:var(--primary);
  background:#0A1626;
  box-shadow:0 0 0 3px rgba(53,242,208,.14),0 0 18px rgba(53,242,208,.18);
}
.field.is-invalid input,.field.is-invalid select,.field.is-invalid textarea{border-color:var(--danger);box-shadow:0 0 0 3px rgba(255,107,129,.12)}
.field.is-valid input,.field.is-valid select,.field.is-valid textarea{border-color:rgba(74,222,128,.55)}
.field-error{font-size:12.5px;color:var(--danger);min-height:16px;line-height:1.5}
.checkbox-row{display:flex;align-items:flex-start;gap:10px;grid-column:1/-1}
.checkbox-row input[type="checkbox"]{
  width:18px;height:18px;flex:none;margin-top:5px;
  accent-color:#35F2D0;cursor:pointer;
}
.checkbox-row label{font-size:13.5px;color:var(--muted);line-height:1.7;font-weight:400}
.checkbox-row.is-invalid label{color:var(--danger)}
.form-actions{grid-column:1/-1;display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:4px}
.form-note{font-size:12.5px;color:var(--muted)}

/* ---------- 页脚 ---------- */
.footer{
  margin-top:auto;
  padding:64px 0 0;
  border-top:1px solid var(--border);
  background:linear-gradient(180deg,rgba(8,16,28,.6),rgba(6,10,18,1));
  position:relative;
}
.footer::before{
  content:"";
  position:absolute;
  top:-1px;left:16%;right:16%;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,242,208,.55),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:44px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand strong{font-size:16px;font-weight:700;letter-spacing:0}
.footer-desc{font-size:14px;color:var(--muted);line-height:1.85;max-width:34em}
.footer h4{font-size:14px;font-weight:600;color:var(--text);margin-bottom:16px;letter-spacing:.02em}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--muted)}
.footer-links a:hover{color:var(--primary)}
.footer-contact{display:flex;flex-direction:column;gap:10px}
.footer-contact li{font-size:13.5px;color:var(--muted);line-height:1.7}
.footer-contact b{color:var(--text);font-weight:600}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:20px 0 26px;
  border-top:1px solid var(--border);
  font-size:13px;
  color:var(--muted);
}
.site-domain{font-family:var(--mono);font-size:12.5px;letter-spacing:.02em;opacity:.8}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  :root{--sidebar-w:220px}
  .container{padding:0 24px}
  .layout-split{grid-template-columns:230px minmax(0,1fr);gap:28px}
  .long-item{grid-template-columns:190px minmax(0,1fr);gap:20px}
  .cta-band{padding:36px;gap:32px}
  .split-media{gap:32px}
}
@media (max-width:991px){
  .topbar{display:flex}
  .app-main{margin-left:0;padding-top:60px}
  .sidebar{
    width:280px;
    transform:translateX(-100%);
    transition:transform .28s ease;
    z-index:65;
    box-shadow:0 0 60px rgba(0,0,0,.6);
  }
  .sidebar.is-open{transform:translateX(0)}
  .section{padding:56px 0}
  .section-tight{padding:48px 0}
  .page-hero{padding:52px 0 48px}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:32px}
  .layout-split{grid-template-columns:1fr;gap:24px}
  .toc{
    position:static;
    flex-direction:row;
    align-items:center;
    overflow-x:auto;
    padding:14px;
    gap:10px;
    scrollbar-width:none;
    -ms-overflow-style:none;
  }
  .toc::-webkit-scrollbar{display:none}
  .toc-title{display:none}
  .toc a{flex:none;white-space:nowrap;padding:8px 14px;border-color:var(--border);background:rgba(8,17,29,.7)}
  .toc a::after{display:none}
  .toc-card{display:none}
  .timeline{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}
  .timeline::before{display:none}
  .tl-node{padding-top:38px;padding-left:0}
  .split-media{grid-template-columns:1fr;gap:28px}
  .split-figure{aspect-ratio:16/9}
  .cta-band{grid-template-columns:1fr;padding:30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .section{padding:44px 0}
  .section-tight{padding:40px 0}
  .page-hero{padding:40px 0 38px}
  .page-hero h1{font-size:clamp(1.7rem,6vw,2.2rem)}
  .hero-lede{font-size:15px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .long-item{grid-template-columns:1fr;gap:16px;padding:18px}
  .long-thumb{aspect-ratio:16/9}
  .faq-grid{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .point{grid-template-columns:1fr;gap:10px;padding:20px}
  .point-num{font-size:20px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer{padding-top:48px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:480px){
  .hero-stats{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr}
  .btn{width:100%;padding:0 20px}
  .sidebar-card .btn{width:100%}
  .cta-band{padding:22px}
  .form-card{padding:18px}
  .toc{padding:12px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .long-item:hover,.btn-primary:hover{transform:none}
}