/* roulang page: index */
:root{
  --ink:#0B1220;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --primary:#1C4FD8;
  --primary-dark:#143AA6;
  --secondary:#18C8D8;
  --accent:#FF6A2A;
  --success:#17B26A;
  --border:#E4E7EC;
  --muted:#667085;
  --nav-bg:#0A1024;
  --radius:16px;
  --radius-sm:10px;
  --shadow-sm:0 1px 2px rgba(16,24,40,.06);
  --shadow:0 1px 2px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.08);
  --shadow-hover:0 12px 32px rgba(28,79,216,.14);
  --space:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button,input{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:3px solid rgba(34,211,238,.45);outline-offset:2px;border-radius:6px}

.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--tight{padding:56px 0}
.section--alt{background:var(--surface)}
.eyebrow{
  display:inline-block;
  font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--primary);
  background:rgba(28,79,216,.08);
  border-radius:999px;
  padding:5px 14px;
  margin-bottom:14px;
}
.eyebrow--cyan{color:#0E7490;background:rgba(24,200,216,.14)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:36px}
.section-head h2{font-size:28px;line-height:1.4;font-weight:800;letter-spacing:-.01em}
.section-desc{max-width:560px;color:var(--muted);font-size:15px;line-height:1.85}
.lead{color:var(--muted);font-size:16px;line-height:1.9}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 18px rgba(28,79,216,.22)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 12px 26px rgba(28,79,216,.3)}
.btn-ghost{background:transparent;color:var(--primary);border-color:rgba(28,79,216,.4)}
.btn-ghost:hover{background:rgba(28,79,216,.08);border-color:var(--primary);transform:translateY(-1px)}
.btn-neon{background:linear-gradient(90deg,#22D3EE,#5EEAD4);color:#06121F;font-weight:700;box-shadow:0 0 0 1px rgba(34,211,238,.4),0 8px 20px rgba(34,211,238,.25)}
.btn-neon:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(34,211,238,.6),0 12px 26px rgba(34,211,238,.38)}
.btn-block{width:100%}
.btn-sm{height:42px;padding:0 18px;font-size:14px}

/* ============ 徽章 ============ */
.badge{display:inline-block;font-size:12px;font-weight:600;border-radius:999px;padding:4px 12px;line-height:1.6}
.badge-cyan{background:rgba(24,200,216,.14);color:#0E7490}
.badge-blue{background:rgba(28,79,216,.1);color:var(--primary-dark)}
.badge-gray{background:#F2F4F7;color:var(--muted)}
.badge-green{background:rgba(23,178,106,.14);color:#0F7A48}
.badge-orange{background:rgba(255,106,42,.13);color:#C2410C}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--nav-bg);
  border-bottom:1px solid rgba(255,255,255,.08);
  box-shadow:0 10px 30px rgba(6,10,25,.35);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,#22D3EE 28%,#7C5CFF 72%,transparent);
  opacity:.6;pointer-events:none;
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:12px;height:12px;border-radius:50%;flex-shrink:0;
  background:radial-gradient(circle at 30% 30%,#8FF3FF,#22D3EE 45%,#7C5CFF);
  box-shadow:0 0 12px rgba(34,211,238,.85);
}
.brand-text{color:#fff;font-size:18px;font-weight:800;letter-spacing:.02em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:4px;flex:1;justify-content:center}
.nav-link{
  position:relative;display:block;padding:9px 14px;border-radius:8px;
  color:rgba(255,255,255,.72);font-size:15px;font-weight:500;white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.07)}
.nav-link.is-active{color:#8FF3FF;text-shadow:0 0 14px rgba(34,211,238,.55)}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,#22D3EE,#7C5CFF);
  box-shadow:0 0 10px rgba(34,211,238,.6);
}
.nav-cta{
  display:inline-flex;align-items:center;height:40px;padding:0 18px;border-radius:var(--radius-sm);
  font-size:14px;font-weight:700;white-space:nowrap;
  background:linear-gradient(90deg,#22D3EE,#5EEAD4);color:#06121F;
  box-shadow:0 0 0 1px rgba(34,211,238,.4),0 8px 20px rgba(34,211,238,.22);
  transition:filter .2s ease,transform .2s ease;
}
.nav-cta:hover{filter:brightness(1.1);transform:translateY(-1px)}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 10px;border-radius:10px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);cursor:pointer;
}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:#8FF3FF;transition:transform .25s ease,opacity .25s ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-nav{display:none;background:var(--nav-bg);border-top:1px solid rgba(255,255,255,.08);padding:10px 0 18px}
.mobile-nav.is-open{display:block}
.mobile-nav .wrap{display:flex;flex-direction:column;gap:4px}
.mobile-nav .nav-link{padding:12px 14px}
.mobile-nav .nav-cta{margin-top:10px;justify-content:center;width:100%}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:76px 0 72px;background:linear-gradient(180deg,#F8FAFF 0%,#F5F7FB 100%)}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(circle at 12% 18%,rgba(28,79,216,.10),transparent 46%),
    radial-gradient(circle at 88% 8%,rgba(24,200,216,.14),transparent 42%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:
    linear-gradient(rgba(28,79,216,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(28,79,216,.05) 1px,transparent 1px);
  background-size:52px 52px;
  -webkit-mask-image:radial-gradient(circle at 45% 30%,#000 0%,transparent 72%);
  mask-image:radial-gradient(circle at 45% 30%,#000 0%,transparent 72%);
}
.hero .wrap{position:relative;z-index:1}
.grid{display:grid;gap:var(--space)}
.g-7-5{grid-template-columns:7fr 5fr;align-items:center}
.hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.hero h1{font-size:44px;line-height:1.28;font-weight:800;letter-spacing:-.015em;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--primary);position:relative}
.hero-sub{max-width:640px;font-size:17px;line-height:1.95;color:#475467;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.hero-notes{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px;color:var(--muted)}
.hero-notes span{display:inline-flex;align-items:center;gap:7px}
.hero-notes span::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--secondary);flex-shrink:0;
  box-shadow:0 0 8px rgba(24,200,216,.7);
}
.hero-visual{position:relative;border-radius:var(--radius);overflow:hidden;background:#0B1220;
  border:1px solid rgba(34,211,238,.35);
  box-shadow:0 0 0 1px rgba(34,211,238,.14),0 26px 52px rgba(11,18,32,.22);
}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-visual figcaption{
  position:absolute;left:16px;bottom:16px;right:16px;
  padding:12px 16px;border-radius:12px;font-size:13px;line-height:1.6;color:#E6F7FF;
  background:rgba(10,16,36,.78);border:1px solid rgba(34,211,238,.28);
  backdrop-filter:blur(4px);
}

/* ============ 快捷入口条 ============ */
.quick-strip{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--border)}
.quick-item{background:var(--surface);padding:26px 24px;display:flex;gap:14px;align-items:flex-start;transition:background .2s ease}
.quick-item:hover{background:#F8FAFF}
.quick-icon{
  width:40px;height:40px;border-radius:12px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;color:var(--primary);
  background:rgba(28,79,216,.09);
}
.quick-item h3{font-size:16px;font-weight:700;margin-bottom:4px}
.quick-item p{font-size:14px;line-height:1.7;color:var(--muted)}

/* ============ 步骤 ============ */
.steps{display:flex;flex-direction:column;gap:16px}
.step{
  display:flex;gap:18px;padding:22px 24px;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);
  transition:box-shadow .22s ease,border-color .22s ease,transform .22s ease;
}
.step:hover{box-shadow:var(--shadow-hover);border-color:rgba(28,79,216,.3);transform:translateY(-2px)}
.step-num{
  flex-shrink:0;width:38px;height:38px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;color:#fff;
  background:linear-gradient(135deg,var(--primary),#3B6BE8);
  box-shadow:0 6px 14px rgba(28,79,216,.28);
}
.step h3{font-size:16px;font-weight:700;margin-bottom:4px}
.step p{font-size:14.5px;line-height:1.8;color:var(--muted)}
.story-figure{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow);margin-top:24px}
.story-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}

/* ============ 精选内容卡 ============ */
.g-8-4{grid-template-columns:8fr 4fr;align-items:stretch}
.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);overflow:hidden;
  transition:box-shadow .22s ease,border-color .22s ease,transform .22s ease;
}
.card:hover{box-shadow:var(--shadow-hover);border-color:rgba(28,79,216,.3);transform:translateY(-2px)}
.card-media{overflow:hidden}
.card-media img{width:100%;object-fit:cover;transition:transform .35s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:26px 28px}
.card-body h3{font-size:20px;line-height:1.5;font-weight:700;margin:12px 0 10px}
.card-body p{font-size:15px;line-height:1.85;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;font-size:13px;color:var(--muted)}
.card-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;font-size:14px;transition:gap .2s ease}
.card:hover .card-arrow{gap:11px}
.card--feature .card-media img{aspect-ratio:16/9}
.compact-stack{display:flex;flex-direction:column;gap:var(--space)}
.card--compact{display:flex;flex:1;align-items:stretch}
.card--compact .card-media{flex:0 0 42%;display:flex}
.card--compact .card-media img{width:100%;height:100%;min-height:150px;object-fit:cover}
.card--compact .card-body{padding:20px 22px;display:flex;flex-direction:column;justify-content:center}
.card--compact h3{font-size:16px;margin:8px 0 6px;-webkit-line-clamp:2;display:-webkit-box;-webkit-box-orient:vertical;overflow:hidden}
.card--compact p{font-size:14px;-webkit-line-clamp:2}

/* ============ 最新信息（CMS） ============ */
.latest-grid{display:grid;grid-template-columns:7fr 5fr;gap:var(--space);align-items:start}
.latest-feature{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:30px 32px;box-shadow:var(--shadow-sm);
  transition:box-shadow .22s ease,border-color .22s ease,transform .22s ease;
}
.latest-feature:hover{box-shadow:var(--shadow-hover);border-color:rgba(28,79,216,.3);transform:translateY(-2px)}
.latest-feature h3{font-size:22px;line-height:1.5;font-weight:700;margin:14px 0 12px}
.latest-feature h3 a:hover{color:var(--primary)}
.latest-feature p{font-size:15px;line-height:1.9;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.latest-list{display:flex;flex-direction:column;gap:12px}
.latest-row{
  display:block;background:var(--surface);border:1px solid var(--border);border-radius:12px;
  padding:16px 20px;box-shadow:var(--shadow-sm);
  transition:box-shadow .2s ease,border-color .2s ease,transform .2s ease;
}
.latest-row:hover{box-shadow:var(--shadow-hover);border-color:rgba(28,79,216,.3);transform:translateX(3px)}
.latest-row h4{font-size:15.5px;line-height:1.6;font-weight:600;margin:8px 0 6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.latest-row:hover h4{color:var(--primary)}
.latest-row .meta{font-size:13px;color:var(--muted);display:flex;gap:14px;flex-wrap:wrap}
.empty-state{
  border:1px dashed rgba(28,79,216,.35);border-radius:var(--radius);
  background:rgba(28,79,216,.03);padding:56px 24px;text-align:center;
}
.empty-state .empty-icon{
  width:52px;height:52px;margin:0 auto 16px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-size:20px;color:var(--primary);background:rgba(28,79,216,.1);
}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:20px}

/* ============ 信任背书 ============ */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:28px}
.metric{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-sm);text-align:left;
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.metric:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:rgba(28,79,216,.28)}
.metric .num{font-size:34px;line-height:1.2;font-weight:800;color:var(--primary);letter-spacing:-.02em}
.metric .num small{font-size:16px;font-weight:700;margin-left:2px}
.metric .label{font-size:14px;color:var(--muted);margin-top:8px;line-height:1.7}
.quotes{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.quote{
  background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--secondary);
  border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow-sm);
}
.quote p{font-size:15px;line-height:1.9;color:#344054}
.quote cite{display:block;margin-top:12px;font-size:13px;color:var(--muted);font-style:normal}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;margin:0 auto}
.accordion{border:none;background:transparent;margin:0}
.accordion-item{
  border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);
  margin-bottom:12px;overflow:hidden;box-shadow:var(--shadow-sm);
  transition:box-shadow .2s ease,border-color .2s ease;
}
.accordion-item:hover{box-shadow:var(--shadow-hover);border-color:rgba(28,79,216,.28)}
.accordion-title{
  position:relative;display:block;border:none;padding:19px 56px 19px 22px;
  font-size:16px;font-weight:600;color:var(--ink);background:transparent;line-height:1.6;
}
.accordion-title:hover{color:var(--primary);background:transparent}
.accordion-title::before{
  content:"";position:absolute;right:26px;top:50%;width:13px;height:2px;margin:0;
  border-radius:2px;background:var(--primary);transform:translateY(-50%);
}
.accordion-title::after{
  content:"";position:absolute;right:31px;top:50%;width:2px;height:13px;margin:0;
  border-radius:2px;background:var(--primary);transform:translateY(-50%);
  transition:transform .25s ease,opacity .25s ease;
}
.accordion-item.is-active .accordion-title::after{transform:translateY(-50%) rotate(90deg);opacity:0}
.accordion-content{border:none;padding:0 22px 20px;background:transparent}
.accordion-content p{font-size:15px;line-height:1.85;color:var(--muted)}
.accordion-content::before{
  content:"";display:block;width:100%;height:1px;background:var(--border);margin:0 0 16px;
}

/* ============ 订阅 / 进店 ============ */
.subscribe{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:44px 48px;
  background-image:radial-gradient(circle at 92% 12%,rgba(24,200,216,.1),transparent 42%);
}
.subscribe h2{font-size:26px;font-weight:800;line-height:1.45;margin-bottom:12px}
.subscribe p{font-size:15px;line-height:1.9;color:var(--muted)}
.sub-form{display:flex;flex-direction:column;gap:10px}
.sub-form label{font-size:13px;font-weight:600;color:#344054}
.sub-form .field{display:flex;gap:10px}
.sub-form input[type="email"]{
  flex:1;height:48px;padding:0 16px;border-radius:var(--radius-sm);
  border:1px solid var(--border);background:#fff;font-size:15px;color:var(--ink);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.sub-form input[type="email"]::placeholder{color:#98A2B3}
.sub-form input[type="email"]:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(24,200,216,.22)}
.sub-hint{font-size:13px;color:var(--muted)}
.sub-msg{font-size:13.5px;color:var(--success);display:none}
.sub-msg.is-shown{display:block}

/* ============ 页脚 ============ */
.site-footer{background:#0A1024;color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:36px;padding-bottom:44px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-text{color:#fff;font-size:17px}
.footer-brand .brand-mark{width:11px;height:11px}
.site-footer p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.6)}
.site-footer h3{font-size:14px;font-weight:700;color:#fff;letter-spacing:.04em;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.66);transition:color .2s ease}
.footer-links a:hover{color:#8FF3FF}
.footer-sub{display:flex;gap:10px;margin-top:14px}
.footer-sub input{
  flex:1;height:44px;padding:0 14px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  color:#fff;font-size:14px;
}
.footer-sub input::placeholder{color:rgba(255,255,255,.45)}
.footer-sub input:focus{outline:none;border-color:rgba(34,211,238,.7);box-shadow:0 0 0 3px rgba(34,211,238,.2)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding:22px 0 30px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:#8FF3FF}

/* ============ 响应式 ============ */
@media screen and (max-width:1200px){
  .hero h1{font-size:40px}
}
@media screen and (max-width:1024px){
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:flex}
  .section{padding:64px 0}
  .hero{padding:56px 0}
  .g-7-5,.g-8-4,.latest-grid,.footer-grid{grid-template-columns:1fr}
  .metrics{grid-template-columns:1fr 1fr}
  .quotes{grid-template-columns:1fr}
  .quick-grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:36px}
  .subscribe{padding:34px 30px}
}
@media screen and (max-width:768px){
  .wrap{padding:0 18px}
  .section{padding:52px 0}
  .hero{padding:44px 0 52px}
  .hero h1{font-size:32px;line-height:1.35}
  .hero-sub{font-size:16px}
  .section-head h2{font-size:23px}
  .card--compact{flex-direction:column}
  .card--compact .card-media{flex:0 0 auto}
  .card--compact .card-media img{min-height:0;aspect-ratio:16/9}
  .card-body{padding:22px 20px}
  .latest-feature{padding:24px 20px}
  .latest-feature h3{font-size:19px}
  .subscribe{padding:28px 22px}
}
@media screen and (max-width:520px){
  .brand-text{font-size:16px}
  .nav-inner{height:56px;gap:12px}
  .hero h1{font-size:28px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .quick-grid{grid-template-columns:1fr}
  .metrics{grid-template-columns:1fr}
  .sub-form .field{flex-direction:column}
  .sub-form .field .btn{width:100%}
  .footer-sub{flex-direction:column}
  .footer-sub .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: article */
:root{
  --ink:#0B1220;
  --ink-soft:#1D2939;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --primary:#1C4FD8;
  --primary-dark:#143AA6;
  --primary-soft:#EEF3FF;
  --secondary:#18C8D8;
  --accent:#FF6A2A;
  --success:#17B26A;
  --border:#E4E7EC;
  --muted:#667085;
  --nav-bg:#0A1024;
  --radius-card:16px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(16,24,40,.06), 0 8px 24px rgba(16,24,40,.08);
  --shadow-hover:0 12px 32px rgba(28,79,216,.14);
  --gap:24px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","HarmonyOS Sans","Inter",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--primary-dark);text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease,box-shadow .2s ease;}
a:hover{color:var(--accent);}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--ink);letter-spacing:.2px;}
p{margin:0 0 14px;}
ul,ol{margin:0;padding:0;}
button{font-family:inherit;cursor:pointer;}
input,textarea,select{font-family:inherit;}
:focus-visible{outline:3px solid rgba(34,211,238,.45);outline-offset:2px;border-radius:6px;}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--nav-bg);
  border-bottom:1px solid rgba(255,255,255,.08);
  box-shadow:0 10px 30px rgba(6,10,25,.35);
}
.nav-inner{display:flex;align-items:center;gap:18px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:17px;letter-spacing:.4px;white-space:nowrap;}
.brand:hover{color:#fff;}
.brand-mark{
  width:28px;height:28px;flex:0 0 28px;border-radius:9px;
  background:linear-gradient(135deg,var(--secondary),#7C5CFF);
  box-shadow:0 0 0 1px rgba(255,255,255,.14),0 0 18px rgba(34,211,238,.55);
}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 13px;border-radius:8px;
  font-size:15px;font-weight:600;color:rgba(255,255,255,.72);
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.07);}
.nav-link.is-active{color:#22D3EE;text-shadow:0 0 12px rgba(34,211,238,.55);}
.nav-link.is-active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,#22D3EE,#7C5CFF);
  box-shadow:0 0 10px rgba(34,211,238,.75);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:999px;
  background:var(--secondary);color:#04121C;font-size:14px;font-weight:700;
  box-shadow:0 0 0 1px rgba(34,211,238,.4),0 8px 22px rgba(24,200,216,.28);
}
.nav-cta:hover{background:#3EE0EE;color:#04121C;box-shadow:0 0 0 1px rgba(34,211,238,.7),0 10px 26px rgba(24,200,216,.45);}
.nav-toggle{
  display:none;margin-left:auto;align-items:center;justify-content:center;
  width:44px;height:40px;border-radius:10px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);color:#E7ECFF;font-size:17px;
}
.nav-toggle:hover{background:rgba(255,255,255,.12);}
.drawer-mask{position:fixed;inset:0;background:rgba(6,10,25,.58);opacity:0;visibility:hidden;transition:.28s ease;z-index:70;}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:80;
  background:#0A1024;border-left:1px solid rgba(255,255,255,.1);
  padding:20px;transform:translateX(102%);transition:transform .28s ease;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
.drawer .brand{font-size:15px;}
.drawer-close{
  width:38px;height:38px;border-radius:10px;border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.06);color:#DDE6FF;font-size:16px;
}
.drawer-close:hover{background:rgba(255,255,255,.14);}
.drawer-links{display:flex;flex-direction:column;gap:6px;}
.drawer-links a{
  padding:12px 14px;border-radius:10px;color:rgba(255,255,255,.78);font-weight:600;font-size:15px;
  border:1px solid transparent;
}
.drawer-links a:hover{background:rgba(255,255,255,.07);color:#fff;}
.drawer-links a.is-active{
  color:#22D3EE;background:rgba(34,211,238,.09);border-color:rgba(34,211,238,.35);
  box-shadow:inset 0 0 18px rgba(34,211,238,.14);
}
.drawer-cta{margin-top:20px;display:block;text-align:center;}

/* ============ 文章头部 ============ */
.article-head{
  position:relative;
  background:
    radial-gradient(900px 320px at 12% -30%, rgba(28,79,216,.10), transparent 62%),
    radial-gradient(700px 280px at 92% 0%, rgba(24,200,216,.14), transparent 60%),
    var(--surface);
  border-bottom:1px solid var(--border);
  padding:30px 0 46px;
}
.article-head::after{
  content:"";position:absolute;inset:auto 0 0 0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(28,79,216,.35),rgba(24,200,216,.35),transparent);
  opacity:.55;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--muted);margin-bottom:20px;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:#C3CAD6;}
.breadcrumb .current{color:var(--primary-dark);font-weight:600;}
.head-grid{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:36px;align-items:start;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12.5px;font-weight:600;line-height:1.6;
}
.badge-cyan{background:rgba(24,200,216,.14);color:#0E7C86;}
.badge-blue{background:var(--primary-soft);color:var(--primary-dark);}
.badge-muted{background:#F1F3F7;color:var(--muted);}
.article-head h1{
  font-size:42px;line-height:1.28;font-weight:800;margin:16px 0 18px;letter-spacing:.3px;
}
.article-head .lead{font-size:17px;color:#475467;max-width:760px;line-height:1.85;}
.meta-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.meta-item{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 12px;border-radius:999px;background:#F1F3F7;color:var(--muted);font-size:13px;font-weight:600;
}
.meta-item i{color:var(--primary);}
.head-cover{
  border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--border);
  box-shadow:var(--shadow-card);background:#DDE6FF;
}
.head-cover img{width:100%;height:220px;object-fit:cover;}

/* ============ 正文区 ============ */
.article-section{padding:56px 0 72px;}
.article-layout{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:40px;align-items:start;}
.article-panel{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:38px 44px;
}
.article-body{max-width:820px;font-size:18px;line-height:1.9;color:var(--ink-soft);}
.article-body>*:first-child{margin-top:0;}
.article-body h2{
  position:relative;font-size:28px;line-height:1.4;font-weight:800;color:var(--ink);
  margin:44px 0 18px;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;border-radius:3px;
  background:linear-gradient(180deg,var(--primary),var(--secondary));
}
.article-body h3{font-size:20px;line-height:1.5;font-weight:700;color:var(--ink);margin:30px 0 12px;}
.article-body h4{font-size:17px;font-weight:700;margin:22px 0 10px;color:var(--ink);}
.article-body p{margin:0 0 18px;}
.article-body a{color:var(--primary-dark);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
.article-body a:hover{color:var(--accent);text-decoration-thickness:2px;}
.article-body strong{color:var(--ink);font-weight:700;}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:24px;}
.article-body li{margin-bottom:10px;padding-left:4px;}
.article-body ul li::marker{color:var(--secondary);}
.article-body ol li::marker{color:var(--primary);font-weight:700;}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;border-left:3px solid var(--secondary);
  background:#F0F8FA;border-radius:0 12px 12px 0;color:#344054;font-size:17px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--radius-card);margin:22px 0 10px;border:1px solid var(--border);}
.article-body figure{margin:26px 0;}
.article-body figcaption{font-size:13.5px;color:var(--muted);text-align:center;margin-top:8px;}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:15.5px;background:var(--surface);
  border:1px solid var(--border);border-radius:12px;overflow:hidden;
}
.article-body thead th{background:var(--primary-soft);color:var(--primary-dark);font-weight:700;}
.article-body th,.article-body td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border);}
.article-body tbody tr:last-child td{border-bottom:none;}
.article-body tbody tr:hover{background:#FAFBFE;}
.article-body code{
  background:#F1F3F7;padding:2px 6px;border-radius:6px;font-size:15px;color:#B54708;
}
.article-body hr{border:none;border-top:1px solid var(--border);margin:34px 0;}

/* ============ 侧栏 ============ */
.side-stack{display:flex;flex-direction:column;gap:22px;position:sticky;top:88px;}
.side-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:22px 22px 24px;
}
.side-card h2{font-size:16px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card h2 i{color:var(--secondary);}
.toc-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:block;padding:7px 10px;border-radius:8px;font-size:14px;color:#475467;
  border-left:2px solid transparent;line-height:1.6;
}
.toc-list a:hover{background:var(--primary-soft);color:var(--primary-dark);border-left-color:var(--primary);}
.toc-list .toc-h3 a{padding-left:22px;font-size:13.5px;color:var(--muted);}
.rel-list{display:flex;flex-direction:column;gap:14px;}
.rel-item{display:flex;gap:12px;align-items:flex-start;}
.rel-item img{width:72px;height:60px;object-fit:cover;border-radius:10px;flex:0 0 72px;border:1px solid var(--border);}
.rel-item span{font-size:14px;font-weight:600;color:var(--ink-soft);line-height:1.6;}
.rel-item:hover span{color:var(--primary);}
.side-cta{
  background:linear-gradient(150deg,#0F1B3D,#0A1024);
  border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-card);padding:22px;
  color:#C9D4F0;
}
.side-cta h2{color:#fff;font-size:16px;margin-bottom:8px;}
.side-cta p{font-size:14px;color:rgba(201,212,240,.8);margin-bottom:16px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(28,79,216,.24);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px rgba(28,79,216,.32);}
.btn-ghost{background:transparent;color:var(--primary);border-color:rgba(28,79,216,.42);}
.btn-ghost:hover{background:rgba(28,79,216,.08);color:var(--primary-dark);border-color:var(--primary);}
.btn-neon{background:var(--secondary);color:#04121C;}
.btn-neon:hover{background:#3EE0EE;color:#04121C;box-shadow:0 0 0 1px rgba(34,211,238,.6),0 10px 26px rgba(24,200,216,.4);}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-block{width:100%;}

/* ============ 相关推荐 ============ */
.related-section{padding:8px 0 72px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;}
.section-head h2{font-size:28px;line-height:1.35;}
.section-head p{color:var(--muted);font-size:15px;margin:8px 0 0;}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.rel-card{
  display:flex;gap:16px;align-items:stretch;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:16px;transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.rel-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);border-color:rgba(28,79,216,.3);}
.rel-card .thumb{width:104px;flex:0 0 104px;border-radius:12px;overflow:hidden;}
.rel-card .thumb img{width:100%;height:100%;min-height:92px;object-fit:cover;transition:transform .35s ease;}
.rel-card:hover .thumb img{transform:scale(1.06);}
.rel-card h3{font-size:16px;line-height:1.55;margin:10px 0 8px;}
.rel-card p{font-size:14px;color:var(--muted);margin:0;line-height:1.7;}
.rel-card .more{display:inline-block;margin-top:10px;font-size:13.5px;font-weight:600;color:var(--primary);}
.rel-card .more i{margin-left:4px;transition:transform .2s ease;display:inline-block;}
.rel-card:hover .more i{transform:translateX(4px);}

/* ============ 返回 CTA ============ */
.back-cta{
  background:linear-gradient(150deg,#0F1B3D,#0A1024);
  border-radius:20px;padding:38px 40px;color:#D5DEFF;
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
  border:1px solid rgba(255,255,255,.08);
  box-shadow:0 20px 44px rgba(9,15,34,.28);
}
.back-cta h2{color:#fff;font-size:24px;margin-bottom:8px;}
.back-cta p{color:rgba(213,222,255,.78);font-size:15px;margin:0;max-width:620px;}
.back-cta .actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 空态 ============ */
.empty-state{
  border:1.5px dashed #CDD5E1;border-radius:var(--radius-card);
  padding:56px 26px;text-align:center;background:#FBFCFE;color:var(--muted);
}
.empty-state i{font-size:32px;color:#B9C3D3;margin-bottom:14px;display:block;}
.empty-state h2{font-size:20px;color:var(--ink);margin-bottom:10px;}
.empty-state p{font-size:15px;margin-bottom:20px;}

/* ============ 页脚 ============ */
.site-footer{background:#070C1C;color:#AEB9D6;padding:56px 0 26px;border-top:1px solid rgba(255,255,255,.08);}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-text{color:#fff;font-weight:800;font-size:16px;letter-spacing:.3px;}
.footer-brand .brand-mark{width:24px;height:24px;flex:0 0 24px;border-radius:8px;}
.site-footer p{font-size:14px;line-height:1.8;color:#8E9AB8;margin:0;}
.site-footer h3{color:#fff;font-size:15px;margin-bottom:14px;font-weight:700;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{color:#8E9AB8;font-size:14px;}
.footer-links a:hover{color:#22D3EE;}
.footer-sub{display:flex;gap:8px;margin-top:14px;}
.footer-sub input{
  flex:1;min-width:0;height:44px;border-radius:10px;padding:0 14px;
  border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.05);color:#fff;font-size:14px;
}
.footer-sub input::placeholder{color:#7C87A3;}
.footer-sub input:focus{outline:none;border-color:var(--secondary);box-shadow:0 0 0 3px rgba(34,211,238,.22);}
.footer-sub .btn{height:44px;padding:0 18px;}
.footer-msg{margin-top:10px;font-size:13px;color:#22D3EE;min-height:18px;}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:#75809E;
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .article-head h1{font-size:36px;}
  .article-panel{padding:32px 30px;}
}
@media (max-width:1023px){
  .nav-links,.nav-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .head-grid{grid-template-columns:1fr;gap:24px;}
  .head-cover img{height:200px;}
  .article-layout{grid-template-columns:1fr;gap:28px;}
  .side-stack{position:static;}
  .related-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .article-section{padding:44px 0 56px;}
  .article-body{font-size:17px;}
}
@media (max-width:639px){
  .wrap{padding:0 16px;}
  .nav-inner{height:56px;}
  .brand{font-size:15px;}
  .article-head{padding:22px 0 34px;}
  .article-head h1{font-size:32px;line-height:1.35;}
  .article-head .lead{font-size:16px;}
  .article-panel{padding:24px 18px;border-radius:14px;}
  .article-body{font-size:16.5px;line-height:1.85;}
  .article-body h2{font-size:22px;margin:32px 0 14px;}
  .article-body h3{font-size:18px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
  .related-grid{grid-template-columns:1fr;}
  .rel-card{flex-direction:row;}
  .section-head h2{font-size:22px;}
  .back-cta{padding:26px 22px;border-radius:16px;}
  .back-cta .actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .article-section{padding:36px 0 48px;}
}

/* roulang page: category1 */
:root{
  --ink:#0B1220;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --primary:#1C4FD8;
  --primary-dark:#143AA6;
  --secondary:#18C8D8;
  --accent:#FF6A2A;
  --success:#17B26A;
  --border:#E4E7EC;
  --muted:#667085;
  --nav-bg:#0A1024;
  --neon-1:#22D3EE;
  --neon-2:#7C5CFF;
  --radius-card:16px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(16,24,40,.06), 0 8px 24px rgba(16,24,40,.08);
  --shadow-hover:0 12px 32px rgba(28,79,216,.14);
  --section-y:88px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--primary-dark);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent);}
p{margin:0 0 16px;}
h1,h2,h3,h4{margin:0 0 14px;font-weight:800;line-height:1.35;color:var(--ink);letter-spacing:-.01em;}
h1{font-size:44px;line-height:1.24;}
h2{font-size:28px;line-height:1.4;}
h3{font-size:20px;line-height:1.5;font-weight:700;}
ul,ol{margin:0 0 16px;padding-left:20px;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(34,211,238,.45);outline-offset:2px;border-radius:6px;}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:var(--section-y) 0;}
.section-alt{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.section-head{max-width:780px;margin-bottom:36px;}
.section-head p{color:var(--muted);margin:0;font-size:16.5px;}
.h2-bar{position:relative;padding-left:16px;}
.h2-bar::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;background:linear-gradient(180deg,var(--secondary),var(--primary));}
.lead{font-size:17px;color:#3F4A5A;line-height:1.85;}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--nav-bg);border-bottom:1px solid rgba(255,255,255,.08);}
.site-header::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:linear-gradient(90deg,transparent,rgba(34,211,238,.65),rgba(124,92,255,.65),transparent);}
.header-inner{display:flex;align-items:center;gap:20px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;flex:none;}
.brand:hover{color:#fff;}
.brand-mark{width:22px;height:22px;border-radius:50%;flex:none;background:conic-gradient(from 210deg,#22D3EE,#7C5CFF,#22D3EE);box-shadow:0 0 0 3px rgba(34,211,238,.12),0 0 14px rgba(34,211,238,.5);}
.brand-text{font-size:17px;letter-spacing:.02em;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{position:relative;padding:10px 14px;color:rgba(255,255,255,.72);font-size:15px;font-weight:500;border-radius:8px;transition:.2s ease;}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.06);}
.nav-link.is-active{color:#fff;text-shadow:0 0 12px rgba(34,211,238,.55);}
.nav-link.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--neon-1),var(--neon-2));box-shadow:0 0 10px rgba(34,211,238,.75);}
.header-actions{display:flex;align-items:center;gap:12px;flex:none;}
.nav-toggle{display:none;width:42px;height:42px;border-radius:10px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.04);cursor:pointer;padding:0;align-items:center;justify-content:center;}
.nav-toggle span{display:block;width:18px;height:2px;background:#E6EDF7;border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:#E6EDF7;border-radius:2px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;cursor:pointer;transition:.2s ease;text-align:center;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(28,79,216,.22);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px rgba(28,79,216,.3);}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--primary-dark);}
.btn-ghost:hover{background:rgba(28,79,216,.08);color:var(--primary-dark);}
.btn-neon{background:var(--secondary);color:#04202A;font-weight:700;box-shadow:0 0 18px rgba(34,211,238,.35);}
.btn-neon:hover{background:#3EE0EE;color:#04202A;box-shadow:0 0 26px rgba(34,211,238,.6);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px;}
.btn-block{width:100%;}

/* ---------- drawer ---------- */
.drawer{position:fixed;top:0;bottom:0;left:0;width:84%;max-width:340px;background:#0A1024;z-index:120;padding:20px;transform:translateX(-102%);transition:transform .3s ease;overflow-y:auto;border-right:1px solid rgba(255,255,255,.08);}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;gap:10px;padding-bottom:16px;border-bottom:1px solid rgba(255,255,255,.08);margin-bottom:16px;}
.drawer-head .brand-text{font-size:16px;color:#fff;font-weight:800;white-space:normal;line-height:1.4;}
.drawer-close{margin-left:auto;width:36px;height:36px;border-radius:9px;border:1px solid rgba(255,255,255,.18);background:transparent;color:#fff;font-size:20px;line-height:1;cursor:pointer;}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{display:block;padding:12px 14px;border-radius:10px;color:rgba(255,255,255,.76);font-size:15px;font-weight:500;}
.drawer-nav a:hover{background:rgba(255,255,255,.06);color:#fff;}
.drawer-nav a.is-active{color:#fff;background:rgba(34,211,238,.1);box-shadow:inset 3px 0 0 var(--neon-1);text-shadow:0 0 12px rgba(34,211,238,.55);}
.drawer-cta{margin-top:20px;}
.drawer-mask{position:fixed;inset:0;background:rgba(6,11,26,.62);opacity:0;visibility:hidden;transition:.3s ease;z-index:110;}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#EEF3FC 0%,#F5F7FB 100%);border-bottom:1px solid var(--border);}
.hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(28,79,216,.16) 1px,transparent 1px),radial-gradient(rgba(24,200,216,.14) 1px,transparent 1px);background-size:34px 34px,52px 52px;background-position:0 0,14px 18px;opacity:.55;pointer-events:none;}
.hero::after{content:"";position:absolute;right:-160px;top:-120px;width:520px;height:520px;border-radius:50%;border:1px solid rgba(28,79,216,.16);box-shadow:0 0 0 60px rgba(28,79,216,.032),0 0 0 130px rgba(24,200,216,.026);pointer-events:none;}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.12fr .88fr;gap:48px;align-items:center;padding:64px 0 60px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:rgba(28,79,216,.09);color:var(--primary-dark);font-size:13px;font-weight:600;margin-bottom:16px;}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--secondary);box-shadow:0 0 8px rgba(24,200,216,.8);}
.hero h1{margin-bottom:16px;}
.hero-copy p{font-size:17px;color:#3F4A5A;line-height:1.85;margin-bottom:24px;max-width:640px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;}
.tag{display:inline-flex;align-items:center;padding:5px 13px;border-radius:999px;font-size:13px;font-weight:600;background:rgba(24,200,216,.12);color:#0A6C78;}
.tag.gray{background:#EEF1F6;color:var(--muted);}
.tag.green{background:rgba(23,178,106,.12);color:#0B7A47;}
.hero-visual img{width:100%;height:360px;object-fit:cover;border-radius:16px;border:1px solid rgba(34,211,238,.4);box-shadow:0 20px 44px rgba(16,24,40,.16);}

/* ---------- crumbs ---------- */
.crumbs{font-size:14px;color:var(--muted);padding:22px 0 0;}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--primary-dark);}
.crumbs .sep{margin:0 8px;color:#CBD5E1;}
.crumbs .current{color:var(--primary-dark);font-weight:600;}

/* ---------- split layout ---------- */
.split{display:grid;grid-template-columns:41.6667% 58.3333%;gap:32px;align-items:start;}
.sticky-card{position:sticky;top:88px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:24px;}
.sticky-card h3{font-size:16px;margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--border);}
.toc{list-style:none;margin:0;padding:0;}
.toc li{margin-bottom:4px;}
.toc a{display:block;padding:9px 12px;border-radius:9px;font-size:14.5px;color:#3F4A5A;font-weight:500;}
.toc a:hover{background:rgba(28,79,216,.07);color:var(--primary-dark);}
.toc a.is-current{background:rgba(28,79,216,.1);color:var(--primary-dark);font-weight:700;box-shadow:inset 3px 0 0 var(--primary);}
.sticky-note{margin-top:20px;padding:16px;border-radius:12px;background:#F7F9FE;border:1px dashed rgba(28,79,216,.3);font-size:14px;color:#3F4A5A;line-height:1.75;}
.sticky-note strong{color:var(--primary-dark);}
.sticky-thumb{margin-top:20px;border-radius:12px;overflow:hidden;border:1px solid var(--border);}
.sticky-thumb img{width:100%;height:150px;object-fit:cover;}

/* ---------- steps ---------- */
.steps{list-style:none;margin:0;padding:0;counter-reset:step;}
.steps>li{position:relative;padding:0 0 28px 62px;counter-increment:step;}
.steps>li::before{content:counter(step,decimal-leading-zero);position:absolute;left:0;top:0;width:42px;height:42px;border-radius:12px;background:rgba(28,79,216,.09);color:var(--primary-dark);font-weight:800;display:flex;align-items:center;justify-content:center;font-size:15px;font-variant-numeric:tabular-nums;}
.steps>li::after{content:"";position:absolute;left:21px;top:48px;bottom:8px;width:1px;background:linear-gradient(180deg,rgba(28,79,216,.35),var(--border));}
.steps>li:last-child{padding-bottom:0;}
.steps>li:last-child::after{display:none;}
.steps h3{margin:0 0 6px;font-size:18px;}
.steps p{margin:0;color:var(--muted);font-size:15px;line-height:1.8;}

/* ---------- check list ---------- */
.check-list{list-style:none;margin:0;padding:0;display:grid;gap:14px;}
.check-list li{display:flex;gap:14px;padding:18px 20px;background:var(--surface);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow-card);transition:.25s ease;}
.check-list li:hover{border-color:rgba(28,79,216,.3);box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.check-ico{flex:none;width:26px;height:26px;border-radius:8px;background:rgba(23,178,106,.12);position:relative;margin-top:3px;}
.check-ico::after{content:"";position:absolute;left:8px;top:5px;width:6px;height:11px;border:solid var(--success);border-width:0 2px 2px 0;transform:rotate(42deg);}
.check-list h3{font-size:16.5px;margin:0 0 4px;}
.check-list p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.75;}

/* ---------- cards ---------- */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:24px;transition:.25s ease;}
.card:hover{border-color:rgba(28,79,216,.3);box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.media-card{padding:0;overflow:hidden;display:flex;flex-direction:column;}
.media-card .thumb{overflow:hidden;}
.media-card .thumb img{width:100%;height:190px;object-fit:cover;transition:transform .4s ease;}
.media-card:hover .thumb img{transform:scale(1.03);}
.media-card .body{padding:22px 24px 24px;}
.media-card h3{font-size:18px;margin:10px 0 8px;}
.media-card p{margin:0;color:var(--muted);font-size:15px;line-height:1.8;}
.media-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}

/* ---------- tips table ---------- */
.tip-table{width:100%;border-collapse:separate;border-spacing:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);}
.tip-table th,.tip-table td{padding:16px 20px;text-align:left;font-size:15px;border-bottom:1px solid var(--border);vertical-align:top;}
.tip-table th{background:#F7F9FE;font-weight:700;color:var(--ink);font-size:14.5px;}
.tip-table tr:last-child td{border-bottom:0;}
.tip-table td:first-child{font-weight:600;color:var(--primary-dark);width:38%;}
.tip-table td{color:#3F4A5A;}

/* ---------- accordion ---------- */
.accordion{background:transparent;border:0;margin:0;padding:0;list-style:none;}
.accordion-item{background:var(--surface);border:1px solid var(--border);border-radius:12px;margin-bottom:12px;overflow:hidden;box-shadow:var(--shadow-card);transition:.25s ease;}
.accordion-item:hover{border-color:rgba(28,79,216,.3);}
.accordion-item.is-active{border-color:rgba(28,79,216,.38);}
.accordion-title{display:block;padding:18px 52px 18px 22px;font-weight:600;font-size:16px;color:var(--ink);background:transparent;border:0;border-left:3px solid transparent;position:relative;transition:.2s ease;}
.accordion-title:hover{color:var(--primary-dark);}
.accordion-item.is-active .accordion-title{border-left-color:var(--primary);color:var(--primary-dark);}
.accordion-title::before{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:20px;font-weight:600;color:var(--muted);line-height:1;}
.accordion-item.is-active .accordion-title::before{content:"–";color:var(--primary);}
.accordion-content{border:0;background:#FBFCFE;padding:14px 22px 20px;font-size:15px;line-height:1.85;color:#3F4A5A;}

/* ---------- cta band ---------- */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(135deg,#0A1024 0%,#132252 58%,#0E2A4E 100%);border-radius:20px;padding:48px;color:#fff;box-shadow:0 20px 44px rgba(10,16,36,.28);}
.cta-band::after{content:"";position:absolute;right:-80px;bottom:-120px;width:340px;height:340px;border-radius:50%;border:1px solid rgba(34,211,238,.28);box-shadow:0 0 0 44px rgba(34,211,238,.05),0 0 0 96px rgba(124,92,255,.05);pointer-events:none;}
.cta-band h2{color:#fff;position:relative;z-index:1;}
.cta-band p{color:rgba(255,255,255,.76);position:relative;z-index:1;max-width:640px;margin-bottom:24px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1;}

/* ---------- footer ---------- */
.site-footer{background:#0A1024;color:rgba(255,255,255,.72);padding:56px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-text{color:#fff;font-weight:800;font-size:16.5px;white-space:normal;line-height:1.4;}
.site-footer h3{color:#fff;font-size:15.5px;margin-bottom:14px;}
.site-footer p{font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.62);margin:0;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{color:rgba(255,255,255,.72);font-size:14.5px;}
.footer-links a:hover{color:#22D3EE;}
.footer-sub{display:flex;gap:10px;margin-top:14px;}
.footer-sub input{flex:1;min-width:0;height:42px;padding:0 14px;border-radius:10px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);color:#fff;font-size:14px;}
.footer-sub input::placeholder{color:rgba(255,255,255,.42);}
.footer-sub input:focus{outline:none;border-color:var(--secondary);box-shadow:0 0 0 3px rgba(34,211,238,.22);}
.footer-bottom{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;padding:20px 0;border-top:1px solid rgba(255,255,255,.08);font-size:13.5px;color:rgba(255,255,255,.5);}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  :root{--section-y:64px;}
  .nav-links{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-cta{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:32px;padding:48px 0 44px;}
  .hero-visual img{height:280px;}
  .split{grid-template-columns:1fr;gap:28px;}
  .sticky-card{position:static;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:768px){
  :root{--section-y:56px;}
  h1{font-size:34px;}
  h2{font-size:24px;}
  h3{font-size:18px;}
  .hero h1{font-size:34px;}
  .hero-copy p{font-size:16px;}
  .media-grid{grid-template-columns:1fr;}
  .cta-band{padding:32px 24px;}
  .tip-table td:first-child{width:44%;}
  .header-inner{height:56px;gap:12px;}
  .brand-text{font-size:16px;}
}
@media (max-width:520px){
  :root{--section-y:48px;}
  .wrap{padding:0 16px;}
  h1,h2{font-size:26px;}
  .hero h1{font-size:28px;line-height:1.3;}
  .hero-cta .btn{width:100%;}
  .hero-visual img{height:220px;}
  .btn{height:46px;padding:0 20px;font-size:14.5px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-sub{flex-direction:column;}
  .footer-sub .btn{width:100%;}
  .check-list li{padding:16px;}
  .steps>li{padding-left:54px;}
  .steps>li::before{width:38px;height:38px;font-size:14px;}
  .steps>li::after{left:19px;top:44px;}
  .tip-table th,.tip-table td{padding:13px 14px;font-size:14px;}
}
@media (max-width:420px){
  .tip-table,.tip-table tbody,.tip-table tr,.tip-table td,.tip-table th{display:block;width:100%;}
  .tip-table th{display:none;}
  .tip-table tr{border-bottom:1px solid var(--border);}
  .tip-table tr:last-child{border-bottom:0;}
  .tip-table td{border-bottom:0;padding:8px 16px;}
  .tip-table td:first-child{padding-top:16px;width:100%;}
  .tip-table td:last-child{padding-bottom:16px;}
}

/* roulang page: category2 */
:root{
  --ink:#0B1220;
  --ink-2:#1D2939;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --primary:#1C4FD8;
  --primary-dark:#143AA6;
  --secondary:#18C8D8;
  --accent:#FF6A2A;
  --success:#17B26A;
  --danger:#D92D20;
  --border:#E4E7EC;
  --muted:#667085;
  --nav-bg:#0A1024;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-sm:0 1px 2px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.08);
  --shadow-hover:0 12px 32px rgba(28,79,216,.14);
  --ring:0 0 0 3px rgba(34,211,238,.45);
  --space-sec:88px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--primary-dark);text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease;}
a:hover{color:var(--accent);}
h1,h2,h3,h4,p,figure,blockquote{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;font-size:inherit;}
:focus-visible{outline:3px solid rgba(34,211,238,.55);outline-offset:2px;}
::selection{background:rgba(28,79,216,.16);}

.wrap,.grid-container{
  width:100%;
  max-width:1240px;
  margin-left:auto;
  margin-right:auto;
  padding-left:24px;
  padding-right:24px;
}
.grid-container{max-width:1240px;padding-left:24px;padding-right:24px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:var(--nav-bg);
  border-bottom:1px solid rgba(255,255,255,.08);
  box-shadow:0 10px 30px rgba(10,16,36,.28);
}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:20px;
  height:64px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:26px;height:26px;border-radius:8px;flex:0 0 auto;
  background:linear-gradient(135deg,#22D3EE 0%,#7C5CFF 100%);
  box-shadow:0 0 16px rgba(34,211,238,.55);
}
.brand-text{
  color:#fff;
  font-weight:700;
  font-size:17px;
  letter-spacing:.02em;
  white-space:nowrap;
}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:9px 14px;
  border-radius:8px;
  color:rgba(255,255,255,.72);
  font-size:15px;
  font-weight:500;
  white-space:nowrap;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.07);}
.nav-link.is-active{
  color:#67E8F9;
  text-shadow:0 0 12px rgba(34,211,238,.55);
}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;border-radius:2px;
  background:linear-gradient(90deg,#22D3EE,#7C5CFF);
  box-shadow:0 0 12px rgba(34,211,238,.55);
}
.nav-cta{flex:0 0 auto;}
.nav-toggle{
  display:none;
  margin-left:auto;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.06);
  color:#fff;
  font-size:18px;
  cursor:pointer;
  transition:background-color .2s ease,border-color .2s ease;
}
.nav-toggle:hover{background:rgba(34,211,238,.14);border-color:rgba(34,211,238,.4);}
.mobile-panel{
  display:none;
  background:#0A1024;
  border-top:1px solid rgba(255,255,255,.08);
  padding:14px 24px 22px;
}
.mobile-panel.is-open{display:block;}
.mobile-panel .m-brand{
  display:flex;align-items:center;gap:10px;
  padding:10px 4px 16px;
  border-bottom:1px solid rgba(255,255,255,.08);
  margin-bottom:10px;
}
.mobile-panel .m-brand span:last-child{color:#fff;font-weight:700;font-size:16px;}
.m-link{
  display:block;
  padding:13px 14px;
  border-radius:10px;
  color:rgba(255,255,255,.78);
  font-size:16px;
}
.m-link:hover{background:rgba(255,255,255,.06);color:#fff;}
.m-link.is-active{
  color:#67E8F9;
  background:rgba(34,211,238,.1);
  box-shadow:inset 0 0 0 1px rgba(34,211,238,.28);
  text-shadow:0 0 10px rgba(34,211,238,.5);
}
.mobile-panel .btn{width:100%;margin-top:14px;justify-content:center;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border:1px solid transparent;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(28,79,216,.24);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 28px rgba(28,79,216,.32);}
.btn-ghost{background:#fff;color:var(--primary);border-color:rgba(28,79,216,.38);}
.btn-ghost:hover{background:rgba(28,79,216,.08);color:var(--primary-dark);border-color:var(--primary);transform:translateY(-1px);}
.btn-neon{background:var(--secondary);color:#06202A;box-shadow:0 8px 22px rgba(24,200,216,.3);}
.btn-neon:hover{background:#3ADBEA;color:#06202A;transform:translateY(-1px);box-shadow:0 12px 28px rgba(24,200,216,.45);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(255,106,42,.28);}
.btn-accent:hover{background:#F05515;color:#fff;transform:translateY(-1px);}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}

/* ---------- 面包屑与标签 ---------- */
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--muted);
  padding:24px 0 4px;
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--primary);}
.crumb .sep{color:#C4C9D4;}
.crumb .cur{color:var(--primary-dark);font-weight:600;}

.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 20px;}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 13px;
  border-radius:999px;
  font-size:12.5px;
  font-weight:600;
  line-height:1.6;
}
.badge-cyan{background:rgba(24,200,216,.13);color:#0B7F8C;}
.badge-blue{background:rgba(28,79,216,.1);color:var(--primary-dark);}
.badge-green{background:rgba(23,178,106,.13);color:#0B7A4A;}
.badge-gray{background:#EEF0F4;color:var(--muted);}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(circle at 82% 12%,rgba(24,200,216,.12),transparent 42%),
    radial-gradient(circle at 8% 82%,rgba(28,79,216,.1),transparent 46%),
    linear-gradient(180deg,#FFFFFF 0%,#F5F7FB 100%);
  border-bottom:1px solid var(--border);
  padding-bottom:72px;
}
.page-hero::before{
  content:"";
  position:absolute;
  top:-180px;right:-160px;
  width:520px;height:520px;
  border-radius:50%;
  border:1px solid rgba(28,79,216,.14);
  box-shadow:0 0 0 60px rgba(24,200,216,.04),0 0 0 120px rgba(28,79,216,.03);
  pointer-events:none;
}
.page-hero .grid-x{position:relative;z-index:1;}
.hero-inner{padding-top:34px;}
.hero-h1{
  font-size:44px;
  line-height:1.28;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--ink);
}
.hero-h1 em{
  font-style:normal;
  background:linear-gradient(90deg,var(--primary) 0%,var(--secondary) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-lead{
  margin-top:18px;
  max-width:640px;
  font-size:17px;
  line-height:1.9;
  color:var(--muted);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-facts{
  display:flex;
  flex-wrap:wrap;
  gap:26px;
  margin-top:34px;
  padding-top:24px;
  border-top:1px dashed var(--border);
}
.hero-facts li{font-size:14px;color:var(--muted);}
.hero-facts b{display:block;font-size:20px;color:var(--ink);font-weight:800;line-height:1.4;}
.hero-figure{
  position:relative;
  margin-top:14px;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid rgba(28,79,216,.22);
  box-shadow:0 18px 44px rgba(16,24,40,.14);
  aspect-ratio:4/3.1;
  background:#0A1024;
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.hero-figure figcaption{
  position:absolute;
  left:14px;right:14px;bottom:14px;
  padding:10px 14px;
  border-radius:var(--radius-sm);
  background:rgba(10,16,36,.72);
  color:#E6F7FB;
  font-size:13px;
  line-height:1.6;
  backdrop-filter:blur(2px);
}
.hero-tag{
  position:absolute;
  top:14px;left:14px;
  padding:6px 12px;
  border-radius:999px;
  background:rgba(24,200,216,.92);
  color:#06202A;
  font-size:12.5px;
  font-weight:700;
}

/* ---------- 通用板块 ---------- */
.section{padding:var(--space-sec) 0;}
.section-alt{background:#FFFFFF;border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head .eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--secondary);
  margin-bottom:12px;
  text-transform:uppercase;
}
.section-head h2{
  font-size:28px;
  line-height:1.42;
  font-weight:800;
  color:var(--ink);
}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px;line-height:1.9;}

/* ---------- 卡片 ---------- */
.card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
  padding:28px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  height:100%;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(28,79,216,.28);}
.card h3{font-size:19px;font-weight:700;line-height:1.5;color:var(--ink);}
.card p{margin-top:10px;color:var(--muted);font-size:15px;line-height:1.85;}
.card-icon{
  width:46px;height:46px;
  display:flex;align-items:center;justify-content:center;
  border-radius:13px;
  font-size:19px;
  margin-bottom:18px;
  background:rgba(28,79,216,.1);
  color:var(--primary);
}
.card-icon.i-cyan{background:rgba(24,200,216,.14);color:#0B7F8C;}
.card-icon.i-orange{background:rgba(255,106,42,.13);color:#D4530F;}
.card-icon.i-green{background:rgba(23,178,106,.13);color:#0B7A4A;}
.card-list{margin-top:16px;}
.card-list li{
  position:relative;
  padding-left:20px;
  font-size:14.5px;
  color:var(--ink-2);
  line-height:1.85;
}
.card-list li::before{
  content:"";
  position:absolute;left:2px;top:12px;
  width:6px;height:6px;border-radius:50%;
  background:var(--secondary);
}

/* ---------- 安全清单 ---------- */
.check-panel{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
  padding:32px;
}
.check-list li{
  display:flex;
  gap:14px;
  padding:16px 0;
  border-bottom:1px dashed var(--border);
  font-size:15.5px;
  color:var(--ink-2);
  line-height:1.8;
}
.check-list li:last-child{border-bottom:0;}
.check-list .chk{
  flex:0 0 auto;
  width:24px;height:24px;
  margin-top:3px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(23,178,106,.14);
  color:var(--success);
  font-size:12px;
}
.check-list .chk.warn{background:rgba(255,106,42,.14);color:#D4530F;}
.side-figure{
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--border);
  box-shadow:var(--shadow-sm);
  aspect-ratio:16/11;
  background:#0A1024;
}
.side-figure img{width:100%;height:100%;object-fit:cover;}
.side-note{
  margin-top:20px;
  padding:22px 24px;
  border-radius:var(--radius-md);
  background:linear-gradient(135deg,rgba(28,79,216,.08),rgba(24,200,216,.1));
  border:1px solid rgba(28,79,216,.16);
}
.side-note h3{font-size:16.5px;font-weight:700;color:var(--ink);}
.side-note p{margin-top:8px;font-size:14.5px;color:var(--muted);line-height:1.85;}

/* ---------- 指标条 ---------- */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  background:var(--border);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
}
.stat-strip .stat{
  background:var(--surface);
  padding:28px 24px;
}
.stat-num{
  font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:32px;
  font-weight:800;
  line-height:1.2;
  color:var(--primary);
  letter-spacing:-.01em;
}
.stat-num span{font-size:16px;margin-left:4px;color:var(--muted);font-weight:600;}
.stat-label{margin-top:8px;font-size:14.5px;color:var(--muted);line-height:1.7;}

/* ---------- FAQ ---------- */
.faq-block{max-width:900px;margin:0 auto;}
ul.accordion{
  background:transparent;
  border:0;
  margin:0;
}
ul.accordion .accordion-item{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:14px;
  margin-bottom:14px;
  overflow:hidden;
  box-shadow:0 1px 2px rgba(16,24,40,.05);
  transition:border-color .2s ease,box-shadow .2s ease;
}
ul.accordion .accordion-item.is-active{
  border-color:rgba(28,79,216,.32);
  box-shadow:var(--shadow-hover);
}
ul.accordion .accordion-title{
  position:relative;
  display:block;
  padding:20px 58px 20px 22px;
  background:var(--surface);
  border:0;
  font-size:16px;
  font-weight:600;
  line-height:1.6;
  color:var(--ink);
}
ul.accordion .accordion-title:hover,
ul.accordion .accordion-title:focus{background:#F7F9FE;color:var(--primary-dark);}
ul.accordion .accordion-title::before{
  content:"\002B";
  position:absolute;
  right:20px;top:50%;
  transform:translateY(-50%);
  width:26px;height:26px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  background:rgba(28,79,216,.1);
  color:var(--primary);
  font-size:15px;
  font-weight:700;
  margin:0;
}
ul.accordion .accordion-title[aria-expanded="true"]::before{
  content:"\2212";
  background:var(--primary);
  color:#fff;
}
ul.accordion .accordion-content{
  border:0;
  border-left:3px solid var(--primary);
  background:#FBFCFE;
  padding:2px 24px 22px;
  color:var(--muted);
  font-size:15px;
  line-height:1.9;
}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  background:linear-gradient(135deg,#0B1533 0%,#122A6B 55%,#0A1024 100%);
  border-radius:22px;
  padding:52px 48px;
  color:#fff;
  box-shadow:0 24px 60px rgba(11,21,51,.36);
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-120px;bottom:-160px;
  width:380px;height:380px;
  border-radius:50%;
  border:1px solid rgba(34,211,238,.28);
  box-shadow:0 0 0 50px rgba(34,211,238,.05);
}
.cta-band h2{
  position:relative;
  z-index:1;
  font-size:28px;
  font-weight:800;
  line-height:1.4;
  color:#fff;
}
.cta-band p{
  position:relative;
  z-index:1;
  margin-top:14px;
  max-width:560px;
  color:rgba(255,255,255,.78);
  font-size:15.5px;
  line-height:1.9;
}
.sub-form{
  position:relative;
  z-index:1;
  display:flex;
  gap:10px;
  margin-top:26px;
  max-width:520px;
}
.sub-form input{
  flex:1 1 auto;
  min-width:0;
  height:48px;
  padding:0 16px;
  border-radius:var(--radius-sm);
  border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.08);
  color:#fff;
  font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.sub-form input::placeholder{color:rgba(255,255,255,.5);}
.sub-form input:focus{
  outline:none;
  border-color:var(--secondary);
  background:rgba(255,255,255,.12);
  box-shadow:0 0 0 3px rgba(34,211,238,.28);
}
.form-hint{
  position:relative;
  z-index:1;
  margin-top:12px;
  font-size:13.5px;
  color:rgba(255,255,255,.62);
}
.form-state{
  position:relative;
  z-index:1;
  margin-top:10px;
  font-size:13.5px;
  color:#7CF3CE;
  min-height:20px;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#0A1024;
  color:rgba(255,255,255,.72);
  padding:68px 0 26px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:44px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{color:#fff;font-size:17px;font-weight:700;}
.site-footer p{font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.62);}
.site-footer h3{
  font-size:15px;
  font-weight:700;
  color:#fff;
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-links a{
  display:block;
  padding:6px 0;
  font-size:14.5px;
  color:rgba(255,255,255,.66);
}
.footer-links a:hover{color:#67E8F9;}
.footer-sub{display:flex;gap:8px;margin-top:14px;}
.footer-sub input{
  flex:1 1 auto;
  min-width:0;
  height:44px;
  padding:0 14px;
  border-radius:var(--radius-sm);
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.06);
  color:#fff;
  font-size:14px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.footer-sub input::placeholder{color:rgba(255,255,255,.45);}
.footer-sub input:focus{
  outline:none;
  border-color:var(--secondary);
  box-shadow:0 0 0 3px rgba(34,211,238,.25);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:space-between;
  margin-top:44px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.08);
  font-size:13.5px;
  color:rgba(255,255,255,.48);
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  :root{--space-sec:64px;}
  .nav-links,.nav-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .hero-h1{font-size:36px;}
  .section-head h2{font-size:25px;}
  .cta-band{padding:42px 32px;}
  .cta-band h2{font-size:24px;}
  .stat-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media (max-width:767px){
  :root{--space-sec:56px;}
  .wrap,.grid-container{padding-left:16px;padding-right:16px;}
  .hero-h1{font-size:30px;line-height:1.35;}
  .hero-lead{font-size:15.5px;}
  .hero-inner{padding-top:20px;}
  .hero-actions .btn{width:100%;}
  .hero-facts{gap:18px 26px;}
  .hero-figure{aspect-ratio:16/11;margin-top:26px;}
  .section-head h2{font-size:22px;}
  .card,.check-panel{padding:22px;}
  .sub-form{flex-direction:column;}
  .sub-form .btn{width:100%;}
  .cta-band{padding:32px 22px;border-radius:18px;}
  .cta-band h2{font-size:21px;}
  .stat-strip{grid-template-columns:1fr;}
  .stat-strip .stat{padding:22px;}
  .site-footer{padding-top:52px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  ul.accordion .accordion-title{padding:17px 52px 17px 18px;font-size:15.2px;}
  ul.accordion .accordion-content{padding:2px 18px 20px;}
}
@media (max-width:420px){
  .brand-text{font-size:15px;}
}

/* roulang page: category3 */
:root{
  --ink:#0B1220;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --primary:#1C4FD8;
  --primary-dark:#143AA6;
  --secondary:#18C8D8;
  --accent:#FF6A2A;
  --success:#17B26A;
  --danger:#D92D20;
  --border:#E4E7EC;
  --muted:#667085;
  --nav:#0A1024;
  --nav-soft:#111A33;
  --radius:16px;
  --radius-sm:10px;
  --shadow-sm:0 1px 2px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.08);
  --shadow-hover:0 12px 32px rgba(28,79,216,.14);
  --space:88px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","HarmonyOS Sans",Inter,system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--primary-dark);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent);}
button{font:inherit;color:inherit;cursor:pointer;}
input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4{font-weight:700;line-height:1.35;margin:0;color:var(--ink);letter-spacing:0;}
p{margin:0 0 16px;}
ul{margin:0;padding:0;list-style:none;}
.site-wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.grid-container{max-width:1240px;padding-left:24px;padding-right:24px;}
.section{padding:var(--space) 0;}
.section-sm{padding:56px 0;}
.section-head{margin-bottom:40px;max-width:760px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--primary);text-transform:uppercase;
  background:rgba(28,79,216,.08);
  border-radius:999px;padding:6px 14px;margin-bottom:16px;
}
.eyebrow i{color:var(--secondary);}
h1{font-size:44px;font-weight:800;line-height:1.25;}
h2{font-size:28px;line-height:1.4;}
h3{font-size:20px;line-height:1.5;}
.lead{font-size:17px;color:var(--muted);line-height:1.85;}
.muted{color:var(--muted);}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--nav);
  border-bottom:1px solid rgba(255,255,255,.08);
  box-shadow:0 8px 28px rgba(4,8,22,.35);
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,rgba(34,211,238,0),#22D3EE,rgba(124,92,255,.9),rgba(34,211,238,0));
  opacity:.75;
}
.header-inner{
  display:flex;align-items:center;gap:24px;
  height:64px;
}
.brand{display:flex;align-items:center;gap:10px;color:#fff;flex:0 0 auto;}
.brand:hover{color:#fff;}
.brand-mark{
  width:30px;height:30px;border-radius:9px;flex:0 0 auto;
  background:radial-gradient(circle at 30% 25%,#22D3EE,rgba(34,211,238,.15) 60%),
             linear-gradient(140deg,#1C4FD8,#0A1024);
  box-shadow:0 0 0 1px rgba(34,211,238,.5),0 0 16px rgba(34,211,238,.35);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:7px;border-radius:50%;
  border:2px solid rgba(255,255,255,.85);border-left-color:transparent;border-bottom-color:transparent;
  transform:rotate(45deg);
}
.brand-text{font-size:16px;font-weight:700;letter-spacing:.02em;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  position:relative;display:inline-block;
  padding:10px 12px;border-radius:8px;
  font-size:15px;font-weight:600;color:rgba(233,238,255,.78);
  transition:color .2s ease,background .2s ease,text-shadow .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,#22D3EE,#7C5CFF);
  transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.06);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{
  color:#7DEBFA;
  text-shadow:0 0 14px rgba(34,211,238,.55);
  background:rgba(34,211,238,.08);
}
.nav-link.is-active::after{transform:scaleX(1);}
.header-cta{
  flex:0 0 auto;margin-left:8px;
  background:#22D3EE;color:#06121F!important;
  border-radius:var(--radius-sm);padding:11px 18px;
  font-size:15px;font-weight:700;
  box-shadow:0 0 0 1px rgba(34,211,238,.4),0 10px 24px rgba(34,211,238,.22);
}
.header-cta:hover{background:#5CE6F5;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(34,211,238,.6),0 14px 30px rgba(34,211,238,.35);}
.nav-toggle{
  display:none;margin-left:auto;
  width:42px;height:42px;border-radius:10px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  color:#E9EEFF;font-size:17px;
}
.nav-toggle:hover{background:rgba(34,211,238,.12);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border:1px solid transparent;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  text-align:center;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(28,79,216,.24);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 28px rgba(28,79,216,.3);}
.btn-ghost{background:transparent;color:var(--primary-dark);border-color:rgba(28,79,216,.45);}
.btn-ghost:hover{background:rgba(28,79,216,.08);color:var(--primary-dark);transform:translateY(-1px);}
.btn-neon{background:#22D3EE;color:#06121F;font-weight:700;}
.btn-neon:hover{background:#5CE6F5;color:#06121F;transform:translateY(-1px);box-shadow:0 10px 24px rgba(34,211,238,.28);}
.btn-sm{padding:10px 16px;font-size:14px;border-radius:9px;}
.btn-block{width:100%;}
.btn:focus-visible,.nav-link:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{
  outline:3px solid rgba(34,211,238,.45);outline-offset:2px;
}

/* ---------- Badges / tags ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  border-radius:999px;padding:4px 12px;
  font-size:13px;font-weight:600;line-height:1.6;
}
.badge-primary{background:rgba(28,79,216,.1);color:var(--primary-dark);}
.badge-cyan{background:rgba(24,200,216,.14);color:#0B7C8A;}
.badge-green{background:rgba(23,178,106,.14);color:#0B7A4B;}
.badge-gray{background:#F2F4F7;color:var(--muted);}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:8px 14px;border-radius:999px;
  background:var(--surface);border:1px solid var(--border);
  font-size:14px;font-weight:600;color:#344054;
  transition:border-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.tag:hover{border-color:rgba(28,79,216,.45);color:var(--primary-dark);transform:translateY(-1px);box-shadow:var(--shadow-sm);}
.tag i{color:var(--secondary);}

/* ---------- Breadcrumb ---------- */
.crumb{padding:20px 0 0;font-size:14px;color:var(--muted);}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--primary-dark);}
.crumb .sep{margin:0 8px;color:#C3C9D4;}
.crumb .current{color:var(--primary-dark);font-weight:600;}

/* ---------- Hero ---------- */
.help-hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 420px at 88% -10%,rgba(34,211,238,.20),transparent 62%),
    radial-gradient(700px 380px at 5% 110%,rgba(28,79,216,.16),transparent 60%),
    var(--surface);
  border-bottom:1px solid var(--border);
  padding:56px 0 72px;
}
.help-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(11,18,32,.10) 1px,transparent 1px);
  background-size:26px 26px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 78%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.55),transparent 78%);
}
.help-hero .grid-container{position:relative;z-index:1;}
.hero-title{font-size:44px;font-weight:800;line-height:1.24;margin:0 0 18px;}
.hero-title .hl{
  background:linear-gradient(180deg,transparent 62%,rgba(24,200,216,.35) 62%);
  padding:0 2px;
}
.hero-sub{font-size:17px;color:var(--muted);line-height:1.9;margin-bottom:24px;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}

.search-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);padding:28px;
}
.search-label{display:block;font-size:14px;font-weight:700;color:#344054;margin-bottom:10px;}
.search-row{display:flex;gap:10px;}
.search-field{
  position:relative;flex:1 1 auto;
  display:flex;align-items:center;
  background:#F9FAFC;border:1px solid var(--border);border-radius:var(--radius-sm);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-field:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(34,211,238,.35);}
.search-field i{color:var(--muted);padding:0 0 0 14px;font-size:15px;}
.search-field input{
  width:100%;height:48px;border:0;background:transparent;outline:none;padding:0 14px;
  font-size:15px;color:var(--ink);
}
.search-field input::placeholder{color:#98A2B3;}
.search-hint{font-size:13px;color:var(--muted);margin:12px 0 0;}
.quick-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:20px;}
.quick-item{
  display:flex;align-items:center;gap:10px;
  padding:12px 14px;border-radius:12px;
  background:#F7F9FC;border:1px solid var(--border);
  font-size:14px;font-weight:600;color:#344054;
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.quick-item:hover{border-color:rgba(28,79,216,.4);background:#fff;transform:translateY(-1px);}
.quick-item i{color:var(--primary);}

/* ---------- Cards ---------- */
.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  overflow:hidden;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(28,79,216,.3);}
.card-body{padding:26px 28px;}
.card-media{position:relative;overflow:hidden;border-radius:var(--radius) var(--radius) 0 0;}
.card-media img{width:100%;height:210px;object-fit:cover;transition:transform .35s ease;}
.card:hover .card-media img{transform:scale(1.03);}
.card h3{margin:14px 0 10px;}
.card p{color:var(--muted);font-size:15px;margin:0;}
.card-link{
  display:inline-flex;align-items:center;gap:8px;margin-top:18px;
  font-size:15px;font-weight:600;color:var(--primary-dark);
}
.card:hover .card-link i{transform:translateX(4px);}
.card-link i{transition:transform .25s ease;}

.panel{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);padding:28px;
}
.panel-title{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;margin-bottom:18px;}
.panel-title i{color:var(--secondary);}

/* ---------- Side index ---------- */
.index-card{position:sticky;top:96px;}
.index-list li + li{margin-top:4px;}
.index-list a{
  display:flex;align-items:center;gap:10px;
  padding:11px 14px;border-radius:10px;
  font-size:15px;font-weight:600;color:#344054;
  border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.index-list a:hover{background:#F5F7FB;color:var(--primary-dark);border-color:var(--border);}
.index-list a .num{
  width:24px;height:24px;border-radius:8px;flex:0 0 auto;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(28,79,216,.1);color:var(--primary-dark);
  font-size:12px;font-weight:700;
}
.index-note{
  margin-top:20px;padding:16px;border-radius:12px;
  background:rgba(24,200,216,.08);border:1px solid rgba(24,200,216,.25);
  font-size:14px;color:#0B5C68;line-height:1.8;
}

/* ---------- Steps ---------- */
.steps{counter-reset:step;display:grid;gap:16px;}
.step{
  display:flex;gap:16px;padding:22px;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  transition:border-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.step:hover{border-color:rgba(28,79,216,.3);transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.step-num{
  flex:0 0 auto;width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--primary),#3F7BFF);
  color:#fff;font-weight:800;font-size:16px;
  box-shadow:0 8px 18px rgba(28,79,216,.24);
}
.step h3{margin-bottom:6px;font-size:18px;}
.step p{margin:0;color:var(--muted);font-size:15px;}
.step-figure img{width:100%;height:320px;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow-sm);}
.step-figure figcaption{font-size:13px;color:var(--muted);margin-top:12px;}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;}
.faq-item{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);overflow:hidden;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.faq-item.is-open{border-color:rgba(28,79,216,.35);box-shadow:var(--shadow-hover);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;background:transparent;border:0;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);
}
.faq-q i{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(28,79,216,.1);color:var(--primary-dark);font-size:12px;
  transition:transform .25s ease,background .25s ease,color .25s ease;
}
.faq-item.is-open .faq-q i{background:var(--primary);color:#fff;transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease;}
.faq-a-inner{
  padding:0 24px 22px 24px;border-left:3px solid var(--primary);margin-left:24px;
  color:var(--muted);font-size:15px;line-height:1.85;
}
.faq-a-inner p{margin:0 0 10px;}
.faq-a-inner p:last-child{margin-bottom:0;}
.faq-item.is-open .faq-a{max-height:420px;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:
    radial-gradient(600px 300px at 90% 20%,rgba(34,211,238,.22),transparent 65%),
    linear-gradient(135deg,#0A1024,#131E3F 58%,#0A1024);
  border-radius:24px;padding:52px;
  color:#E9EEFF;
}
.cta-band::after{
  content:"";position:absolute;left:-60px;bottom:-120px;width:340px;height:340px;border-radius:50%;
  border:1px solid rgba(34,211,238,.28);pointer-events:none;
}
.cta-band h2{color:#fff;margin-bottom:14px;font-size:28px;}
.cta-band p{color:rgba(233,238,255,.78);font-size:16px;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.cta-band .btn-ghost{color:#7DEBFA;border-color:rgba(125,235,250,.5);}
.cta-band .btn-ghost:hover{background:rgba(34,211,238,.12);color:#B7F4FC;}
.cta-side{position:relative;z-index:1;}
.cta-side .stat-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}
.cta-side .stat{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:14px;padding:18px;
}
.cta-side .stat b{display:block;font-size:24px;color:#7DEBFA;font-weight:800;line-height:1.4;}
.cta-side .stat span{font-size:13px;color:rgba(233,238,255,.7);}

/* ---------- Info list ---------- */
.info-list{display:grid;gap:14px;}
.info-item{
  display:flex;gap:14px;padding:18px 20px;
  background:#F9FAFC;border:1px solid var(--border);border-radius:14px;
  transition:background .2s ease,border-color .2s ease;
}
.info-item:hover{background:#fff;border-color:rgba(28,79,216,.28);}
.info-item i{color:var(--success);font-size:16px;margin-top:4px;}
.info-item h3{font-size:16px;margin-bottom:4px;}
.info-item p{margin:0;color:var(--muted);font-size:14px;}

.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;}
.metric{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow-sm);text-align:left;
}
.metric b{display:block;font-size:28px;font-weight:800;color:var(--primary-dark);line-height:1.3;}
.metric span{font-size:14px;color:var(--muted);}

/* ---------- Footer ---------- */
.site-footer{
  margin-top:var(--space);
  background:var(--nav);color:rgba(233,238,255,.72);
  border-top:1px solid rgba(255,255,255,.08);
  padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{color:#fff;font-size:16px;font-weight:700;}
.site-footer h3{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.02em;}
.site-footer p{font-size:14px;line-height:1.85;color:rgba(233,238,255,.62);}
.footer-links{display:grid;gap:10px;}
.footer-links a{color:rgba(233,238,255,.72);font-size:14px;}
.footer-links a:hover{color:#7DEBFA;}
.footer-sub{display:flex;gap:10px;margin-top:16px;}
.footer-sub input{
  flex:1 1 auto;height:44px;padding:0 14px;
  border-radius:10px;border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.05);color:#fff;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.footer-sub input::placeholder{color:rgba(233,238,255,.4);}
.footer-sub input:focus{border-color:#22D3EE;box-shadow:0 0 0 3px rgba(34,211,238,.3);}
.footer-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(233,238,255,.5);
}
.form-status{font-size:13px;margin-top:10px;display:none;}
.form-status.ok{display:block;color:#7DEBFA;}
.form-status.err{display:block;color:#FF9E9E;}

/* ---------- Responsive ---------- */
@media screen and (max-width:1024px){
  :root{--space:64px;}
  h1,.hero-title{font-size:36px;}
  h2{font-size:24px;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .nav-links{
    position:absolute;left:16px;right:16px;top:68px;
    display:none;flex-direction:column;align-items:stretch;gap:4px;
    padding:14px;border-radius:16px;
    background:var(--nav-soft);border:1px solid rgba(255,255,255,.12);
    box-shadow:0 24px 48px rgba(4,8,22,.45);
  }
  .nav-links.is-open{display:flex;}
  .nav-link{padding:12px 14px;font-size:15px;}
  .header-cta{margin-left:12px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .index-card{position:static;}
  .cta-band{padding:38px;}
}
@media screen and (max-width:640px){
  :root{--space:52px;}
  .site-wrap,.grid-container{padding-left:18px;padding-right:18px;}
  .header-inner{height:56px;}
  .brand-text{font-size:15px;}
  .header-cta{display:none;}
  h1,.hero-title{font-size:30px;line-height:1.32;}
  h2{font-size:22px;}
  h3{font-size:18px;}
  body{font-size:16px;}
  .help-hero{padding:36px 0 52px;}
  .quick-grid{grid-template-columns:1fr;}
  .search-row{flex-direction:column;}
  .search-row .btn{width:100%;}
  .card-media img{height:180px;}
  .card-body{padding:22px;}
  .panel{padding:20px;}
  .step{padding:18px;}
  .step-figure img{height:220px;}
  .faq-q{padding:16px 18px;font-size:15px;}
  .faq-a-inner{margin-left:16px;padding:0 18px 18px 18px;}
  .cta-band{padding:28px;border-radius:18px;}
  .cta-side .stat-row{grid-template-columns:1fr;}
  .metric-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-sub{flex-direction:column;}
  .footer-sub .btn{width:100%;}
}

/* roulang page: category4 */
:root{
  --ink:#0B1220;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --primary:#1C4FD8;
  --primary-dark:#143AA6;
  --secondary:#18C8D8;
  --accent:#FF6A2A;
  --success:#17B26A;
  --border:#E4E7EC;
  --muted:#667085;
  --nav-bg:#0A1024;
  --nav-line:linear-gradient(90deg,#22D3EE,#7C5CFF);
  --radius-lg:16px;
  --radius-sm:10px;
  --shadow-1:0 1px 2px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.08);
  --shadow-2:0 12px 32px rgba(28,79,216,.14);
  --section-pad:88px;
  --wrap:1200px;
}

*,*::before,*::after{ box-sizing:border-box; }

html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}

img{ max-width:100%; display:block; border:0; }
a{ color:var(--primary-dark); text-decoration:none; transition:color .18s ease,border-color .18s ease,background-color .18s ease; }
a:hover{ color:var(--accent); }
button,input{ font-family:inherit; font-size:inherit; }
h1,h2,h3,h4,p,ul,ol{ margin:0; }
ul,ol{ padding:0; list-style:none; }
table{ margin:0; }

:focus-visible{
  outline:3px solid rgba(34,211,238,.45);
  outline-offset:2px;
  border-radius:6px;
}

.wrap{
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 24px;
}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--nav-bg);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.site-header::after{
  content:"";
  display:block;
  height:1px;
  background:var(--nav-line);
  opacity:.75;
}
.header-inner{
  position:relative;
  min-height:64px;
  display:flex;
  align-items:center;
  gap:24px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:32px;
  height:32px;
  border-radius:10px;
  background:linear-gradient(135deg,#22D3EE,#7C5CFF);
  box-shadow:0 0 0 1px rgba(255,255,255,.12),0 6px 18px rgba(34,211,238,.35);
  position:relative;
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:9px;
  border-radius:4px;
  border:2px solid rgba(10,16,36,.85);
  border-bottom-color:transparent;
}
.brand-lockup{
  display:flex;
  flex-direction:column;
  line-height:1.15;
}
.brand-text{
  color:#F2F6FF;
  font-size:17px;
  font-weight:800;
  letter-spacing:.4px;
}
.brand-sub{
  color:#8FA3C8;
  font-size:11px;
  letter-spacing:1.6px;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  color:#B9C6DE;
  font-size:15px;
  font-weight:600;
  border-radius:8px;
}
.nav-link:hover{
  color:#E9F4FF;
  background:rgba(255,255,255,.06);
}
.nav-link.is-active{
  color:#7FE9F5;
  text-shadow:0 0 12px rgba(34,211,238,.55);
}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--nav-line);
  box-shadow:0 0 10px rgba(34,211,238,.6);
}
.header-cta{ margin-left:10px; }
.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:42px;
  height:40px;
  margin-left:auto;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.04);
  cursor:pointer;
}
.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:#DCE7FA;
  position:relative;
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  border-radius:2px;
  background:#DCE7FA;
}
.nav-toggle span::before{ top:-6px; }
.nav-toggle span::after{ top:6px; }

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--radius-sm);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{
  background:var(--primary);
  color:#fff;
  box-shadow:0 10px 22px rgba(28,79,216,.22);
}
.btn-primary:hover{
  background:var(--primary-dark);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:0 14px 28px rgba(28,79,216,.28);
}
.btn-ghost{
  background:#fff;
  border-color:var(--primary);
  color:var(--primary);
}
.btn-ghost:hover{
  background:rgba(28,79,216,.08);
  color:var(--primary-dark);
  transform:translateY(-1px);
}
.btn-neon{
  background:var(--secondary);
  color:#06202A;
  box-shadow:0 8px 20px rgba(24,200,216,.28);
}
.btn-neon:hover{
  background:#3BDCEC;
  color:#06202A;
  transform:translateY(-1px);
  box-shadow:0 10px 26px rgba(24,200,216,.4);
}
.btn-sm{
  height:40px;
  padding:0 18px;
  font-size:14px;
  border-radius:10px;
}
.btn-block{ width:100%; }

/* ============ 面包屑 ============ */
.crumb{
  font-size:14px;
  color:var(--muted);
  padding:22px 0 0;
}
.crumb a{ color:var(--muted); }
.crumb a:hover{ color:var(--primary); }
.crumb .sep{ padding:0 8px; color:#B4BECE; }
.crumb .current{ color:var(--primary-dark); font-weight:600; }

/* ============ 板块 ============ */
.section{
  padding:var(--section-pad) 0;
}
.section-tight{ padding-top:56px; }
.section-head{ max-width:760px; margin-bottom:40px; }
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:700;
  letter-spacing:1.8px;
  color:var(--primary);
  background:rgba(28,79,216,.08);
  border-radius:999px;
  padding:6px 14px;
  margin-bottom:16px;
}
.eyebrow::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--secondary);
  box-shadow:0 0 8px rgba(24,200,216,.8);
}
h1{
  font-size:44px;
  line-height:1.25;
  font-weight:800;
  letter-spacing:-.5px;
}
h2{
  font-size:28px;
  line-height:1.4;
  font-weight:700;
}
h3{
  font-size:20px;
  line-height:1.5;
  font-weight:700;
}
.lead{
  font-size:17px;
  color:#475467;
  line-height:1.85;
}
.muted{ color:var(--muted); font-size:14px; }

/* ============ Hero ============ */
.hero{
  position:relative;
  padding:36px 0 72px;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  top:-160px;
  right:-120px;
  width:520px;
  height:520px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(28,79,216,.12),rgba(28,79,216,0) 68%);
  pointer-events:none;
}
.hero::after{
  content:"";
  position:absolute;
  left:-180px;
  bottom:-220px;
  width:480px;
  height:480px;
  border-radius:50%;
  border:1px dashed rgba(24,200,216,.28);
  pointer-events:none;
}
.hero-grid{ position:relative; z-index:1; align-items:center; }
.hero h1{ margin-bottom:20px; }
.hero h1 .hl{
  color:var(--primary);
  position:relative;
}
.hero .lead{ margin-bottom:28px; max-width:56ch; }
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:28px;
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  border-radius:999px;
  padding:6px 14px;
  font-size:13px;
  font-weight:600;
  background:#EAF7F9;
  color:#0E7A87;
}
.tag-gray{ background:#F2F4F7; color:#475467; }
.tag-green{ background:#E7F7EF; color:#0E7B4C; }
.tag-orange{ background:#FFF1E9; color:#B54818; }
.hero-visual{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid rgba(28,79,216,.35);
  box-shadow:0 18px 44px rgba(16,24,40,.16);
  background:#0A1024;
}
.hero-visual img{
  width:100%;
  height:380px;
  object-fit:cover;
}
.hero-visual::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(10,16,36,0) 40%,rgba(10,16,36,.72));
  pointer-events:none;
}
.hero-visual-caption{
  position:absolute;
  left:22px;
  right:22px;
  bottom:20px;
  z-index:2;
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.hero-visual-caption .tag{
  background:rgba(255,255,255,.14);
  color:#EAF6FF;
  border:1px solid rgba(255,255,255,.22);
  backdrop-filter:none;
}

/* ============ 亮点卡 ============ */
.card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);
  transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.card:hover{
  box-shadow:var(--shadow-2);
  transform:translateY(-3px);
  border-color:rgba(28,79,216,.3);
}
.hl-list{ display:flex; flex-direction:column; gap:16px; }
.hl-item{
  display:flex;
  gap:18px;
  padding:22px 24px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);
  transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.hl-item:hover{
  box-shadow:var(--shadow-2);
  transform:translateY(-3px);
  border-color:rgba(28,79,216,.3);
}
.hl-num{
  flex:0 0 auto;
  width:44px;
  height:44px;
  border-radius:12px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:800;
  font-size:15px;
  color:#fff;
  background:linear-gradient(135deg,var(--primary),#2E6BF0);
  box-shadow:0 8px 18px rgba(28,79,216,.26);
}
.hl-item h3{ margin-bottom:6px; font-size:18px; }
.hl-item p{ color:#475467; font-size:15px; line-height:1.75; }

.side-figure{
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--border);
  box-shadow:var(--shadow-1);
  background:#fff;
}
.side-figure img{ width:100%; height:260px; object-fit:cover; }
.side-figure-body{ padding:22px 24px; }
.side-figure-body h3{ margin-bottom:10px; }
.side-figure-body p{ color:#475467; font-size:15px; line-height:1.75; }
.mini-list{ display:flex; flex-direction:column; gap:10px; margin-top:16px; }
.mini-list li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:15px;
  color:#344054;
}
.mini-list li::before{
  content:"";
  flex:0 0 auto;
  width:8px;
  height:8px;
  margin-top:9px;
  border-radius:50%;
  background:var(--secondary);
  box-shadow:0 0 0 4px rgba(24,200,216,.15);
}

/* ============ 对比表 ============ */
.cmp-wrap{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);
  padding:8px;
  overflow:hidden;
}
.cmp-table{
  width:100%;
  border-collapse:separate;
  border-spacing:0;
  background:#fff;
  border-radius:12px;
  overflow:hidden;
}
.cmp-table thead th{
  background:#0E1730;
  color:#E6EDF7;
  font-size:14px;
  font-weight:600;
  letter-spacing:.4px;
  text-align:left;
  padding:16px 20px;
  border:0;
}
.cmp-table tbody td{
  padding:16px 20px;
  font-size:15px;
  color:#344054;
  border-top:1px solid var(--border);
  vertical-align:middle;
}
.cmp-table tbody tr:hover{ background:#F8FAFF; }
.cmp-table tbody td:first-child{ font-weight:600; color:var(--ink); }
.state{
  display:inline-flex;
  align-items:center;
  gap:6px;
  border-radius:999px;
  padding:4px 12px;
  font-size:13px;
  font-weight:600;
}
.state-ok{ background:#E7F7EF; color:#0E7B4C; }
.state-mid{ background:#FFF4E6; color:#B54708; }
.cmp-note{
  margin-top:18px;
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:18px 22px;
  border:1px dashed #C7D2E4;
  border-radius:var(--radius-lg);
  background:#FBFCFE;
  color:#475467;
  font-size:15px;
}
.cmp-note strong{ color:var(--ink); }

/* ============ 步骤 ============ */
.steps{ display:flex; flex-direction:column; gap:0; }
.step{
  position:relative;
  display:flex;
  gap:20px;
  padding:0 0 28px 0;
}
.step:last-child{ padding-bottom:0; }
.step::before{
  content:"";
  position:absolute;
  left:21px;
  top:44px;
  bottom:0;
  width:2px;
  background:linear-gradient(180deg,rgba(28,79,216,.35),rgba(28,79,216,.05));
}
.step:last-child::before{ display:none; }
.step-idx{
  flex:0 0 auto;
  width:44px;
  height:44px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:800;
  color:var(--primary);
  background:#fff;
  border:2px solid rgba(28,79,216,.35);
  box-shadow:0 6px 16px rgba(28,79,216,.12);
  position:relative;
  z-index:1;
}
.step-body{
  padding-top:4px;
}
.step-body h3{ font-size:17px; margin-bottom:6px; }
.step-body p{ color:#475467; font-size:15px; line-height:1.75; }

.tip-card{
  background:linear-gradient(160deg,#0E1730,#122048);
  border-radius:var(--radius-lg);
  padding:28px;
  color:#D6E1F5;
  border:1px solid rgba(255,255,255,.08);
}
.tip-card h3{ color:#fff; margin-bottom:12px; }
.tip-card p{ font-size:15px; line-height:1.8; color:#AEBBD5; margin-bottom:14px; }
.tip-card .tag{ background:rgba(34,211,238,.16); color:#8BE9F6; }
.tip-list{ display:flex; flex-direction:column; gap:12px; margin-top:18px; }
.tip-list li{
  display:flex;
  gap:10px;
  font-size:15px;
  color:#C6D3EA;
  line-height:1.7;
}
.tip-list li::before{
  content:"";
  flex:0 0 auto;
  width:6px;
  height:6px;
  margin-top:10px;
  border-radius:50%;
  background:var(--secondary);
}

/* ============ FAQ ============ */
.faq-col{ max-width:900px; }
.accordion{
  background:transparent;
  border:0;
  margin:0;
  list-style:none;
}
.accordion .accordion-item{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);
  margin-bottom:14px;
  overflow:hidden;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.accordion .accordion-item:hover{
  border-color:rgba(28,79,216,.3);
  box-shadow:var(--shadow-2);
}
.accordion .accordion-title{
  display:block;
  position:relative;
  padding:18px 56px 18px 24px;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  border:0;
  margin:0;
  line-height:1.6;
}
.accordion .accordion-title:hover{
  color:var(--primary);
  background:#F8FAFF;
}
.accordion .accordion-title::before{
  content:"+";
  position:absolute;
  right:22px;
  top:50%;
  transform:translateY(-50%);
  width:26px;
  height:26px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  font-size:18px;
  font-weight:600;
  color:var(--primary);
  background:rgba(28,79,216,.08);
  line-height:1;
}
.accordion .accordion-item.is-active > .accordion-title{
  color:var(--primary-dark);
  box-shadow:inset 3px 0 0 var(--primary);
}
.accordion .accordion-item.is-active > .accordion-title::before{
  content:"–";
  background:var(--primary);
  color:#fff;
}
.accordion .accordion-content{
  padding:0 24px 20px 24px;
  border:0;
  background:#fff;
  color:#475467;
  font-size:15px;
  line-height:1.85;
}
.accordion .accordion-content p{ margin-bottom:10px; }
.accordion .accordion-content p:last-child{ margin-bottom:0; }

/* ============ CTA ============ */
.cta-band{
  position:relative;
  border-radius:24px;
  overflow:hidden;
  background:#0A1024;
  border:1px solid rgba(255,255,255,.08);
  box-shadow:0 24px 60px rgba(10,16,36,.28);
}
.cta-band img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.32;
}
.cta-band::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(120deg,rgba(10,16,36,.94),rgba(20,58,166,.72));
}
.cta-inner{
  position:relative;
  z-index:2;
  padding:56px 48px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:28px;
  justify-content:space-between;
}
.cta-inner h2{ color:#fff; margin-bottom:12px; }
.cta-inner p{ color:#C3D0E8; font-size:16px; max-width:60ch; }
.cta-actions{ display:flex; flex-wrap:wrap; gap:14px; }

/* ============ 页脚 ============ */
.site-footer{
  margin-top:88px;
  background:var(--nav-bg);
  color:#A9B7D0;
  border-top:1px solid rgba(255,255,255,.08);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding:64px 0 40px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
}
.footer-brand .brand-text{
  color:#F2F6FF;
  font-size:17px;
  font-weight:800;
}
.site-footer h3{
  color:#E6EDF9;
  font-size:15px;
  margin-bottom:16px;
  letter-spacing:.4px;
}
.site-footer p{ font-size:14px; line-height:1.85; color:#93A1BC; }
.footer-links{ display:flex; flex-direction:column; gap:10px; }
.footer-links a{
  color:#A9B7D0;
  font-size:14px;
}
.footer-links a:hover{ color:#7FE9F5; }
.footer-sub{
  display:flex;
  gap:8px;
  margin-top:14px;
}
.footer-sub input{
  flex:1 1 auto;
  min-width:0;
  height:40px;
  padding:0 14px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.06);
  color:#EAF2FF;
  font-size:14px;
}
.footer-sub input::placeholder{ color:#8496B5; }
.footer-sub input:focus{
  outline:none;
  border-color:var(--secondary);
  box-shadow:0 0 0 3px rgba(34,211,238,.35);
}
.sub-msg{ font-size:13px; margin-top:8px; color:#7FE9F5; min-height:18px; }
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:space-between;
  padding:20px 0 28px;
  border-top:1px solid rgba(255,255,255,.08);
  font-size:13px;
  color:#7C8AAA;
}

/* ============ 响应式 ============ */
@media (max-width:1200px){
  h1{ font-size:40px; }
}
@media (max-width:1023px){
  :root{ --section-pad:64px; }
  .nav-toggle{ display:inline-flex; }
  .nav-links{
    position:absolute;
    top:100%;
    left:-24px;
    right:-24px;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    padding:14px 24px 20px;
    background:var(--nav-bg);
    border-top:1px solid rgba(255,255,255,.08);
    border-bottom:1px solid rgba(255,255,255,.08);
    box-shadow:0 24px 40px rgba(4,8,20,.5);
  }
  .site-header.is-open .nav-links{ display:flex; }
  .nav-link{ padding:12px 14px; }
  .nav-link.is-active::after{ left:14px; right:auto; width:36px; }
  .header-cta{ margin-left:0; }
  h1{ font-size:34px; }
  h2{ font-size:24px; }
  .hero{ padding:24px 0 48px; }
  .hero-visual img{ height:300px; }
  .footer-grid{ grid-template-columns:1fr 1fr; gap:32px; padding:48px 0 32px; }
  .cta-inner{ padding:40px 28px; }
}
@media (max-width:767px){
  .cmp-table thead{ display:none; }
  .cmp-table,
  .cmp-table tbody,
  .cmp-table tr,
  .cmp-table td{ display:block; width:100%; }
  .cmp-table{ background:transparent; border-radius:0; }
  .cmp-table tbody tr{
    background:#fff;
    border:1px solid var(--border);
    border-radius:14px;
    box-shadow:var(--shadow-1);
    margin-bottom:14px;
    overflow:hidden;
  }
  .cmp-table tbody td{
    border-top:0;
    border-bottom:1px solid var(--border);
    padding:12px 16px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:14px;
    text-align:right;
  }
  .cmp-table tbody td:last-child{ border-bottom:0; }
  .cmp-table tbody td::before{
    content:attr(data-label);
    flex:0 0 auto;
    color:var(--muted);
    font-size:13px;
    font-weight:600;
    text-align:left;
  }
}
@media (max-width:640px){
  :root{ --section-pad:56px; }
  .wrap{ padding:0 16px; }
  h1{ font-size:32px; line-height:1.3; }
  h2{ font-size:22px; }
  .lead{ font-size:16px; }
  .brand-sub{ display:none; }
  .hero-actions .btn{ width:100%; }
  .cta-actions{ width:100%; }
  .cta-actions .btn{ width:100%; }
  .footer-grid{ grid-template-columns:1fr; gap:28px; }
  .footer-bottom{ flex-direction:column; }
  .hero-visual img{ height:240px; }
  .hl-item{ padding:18px; gap:14px; }
  .side-figure img{ height:200px; }
}
@media (max-width:400px){
  .header-cta{ display:none; }
  .brand-text{ font-size:15px; }
}