/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --bg-900:#05080F;
  --surface-1:#0A1020;
  --surface-2:#0E1728;
  --surface-3:rgba(18,28,48,.55);
  --brand:#2F7CFF;
  --brand-2:#35E0D6;
  --accent:#C8F55A;
  --text-1:#E8EEF9;
  --text-2:#A8B6CE;
  --text-3:#6E7E96;
  --line:rgba(120,170,255,.14);
  --line-strong:rgba(120,170,255,.28);
  --ok:#35E0D6;
  --warn:#FFB547;
  --err:#FF6B6B;
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --r-pill:999px;
  --sh-1:0 8px 24px -12px rgba(0,0,0,.6);
  --sh-2:0 16px 40px -16px rgba(47,124,255,.35);
  --glow:0 0 0 1px rgba(200,245,90,.35), 0 8px 24px -6px rgba(200,245,90,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --maxw:1200px;
}

/* ============ 基础重置 ============ */
*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;line-height:1.32;font-weight:700;letter-spacing:.01em;}
h1{font-size:44px;}
h2{font-size:32px;}
h3{font-size:22px;font-weight:600;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:var(--text-1);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand);}
a:visited{color:var(--text-1);}
a:visited:hover{color:var(--brand);}
img{max-width:100%;display:block;border-radius:var(--r-img);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,textarea,select{font:inherit;color:inherit;}
strong{font-weight:700;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:8px;}
::selection{background:rgba(47,124,255,.35);color:#fff;}

/* ============ 容器与板块 ============ */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px;}
.section{padding:110px 0;position:relative;}
.section-alt{background:var(--surface-1);}
.section-line{position:absolute;left:0;right:0;top:0;height:1px;background:linear-gradient(90deg,transparent,rgba(47,124,255,.45),transparent);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:46px;}
.section-head h2{font-size:32px;}
.section-sub{margin-top:12px;color:var(--text-2);font-size:15px;max-width:640px;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--brand-2);}
.link-more svg{transition:transform .2s var(--ease);}
.link-more:hover svg{transform:translateX(3px);}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:200;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.site-header.scrolled{
  background:rgba(6,10,20,.84);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  border-bottom-color:var(--line);
  box-shadow:0 12px 32px -22px rgba(0,0,0,.95);
}
.nav-inner{display:flex;align-items:center;gap:26px;height:80px;transition:height .22s var(--ease);}
.site-header.scrolled .nav-inner{height:62px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  font-size:13px;font-weight:800;letter-spacing:.04em;color:#05140E;
  background:linear-gradient(135deg,var(--accent),var(--brand-2));
  box-shadow:0 6px 18px -8px rgba(53,224,214,.7);
}
.logo-text{font-size:18px;font-weight:700;}
.logo-seal{
  font-size:11px;line-height:1;padding:4px 6px;border:1px solid var(--line-strong);
  border-radius:6px;color:var(--brand-2);letter-spacing:.06em;
}
.nav-main{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-link{position:relative;font-size:15px;color:var(--text-2);padding:6px 0;}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  box-shadow:0 0 12px rgba(47,124,255,.85);
  transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--text-1);}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand);}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:10px;}
.icon-btn{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  color:var(--text-2);border:1px solid transparent;
  transition:all .2s var(--ease);
}
.icon-btn:hover{color:var(--brand-2);border-color:var(--line);background:rgba(47,124,255,.08);}
.hamburger{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);place-items:center;color:var(--text-1);}
.hamburger span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;margin:3px auto;}
.search-panel{max-height:0;overflow:hidden;transition:max-height .26s var(--ease);background:rgba(5,8,15,.96);}
.search-panel.open{max-height:110px;border-bottom:1px solid var(--line);}
.search-form{display:flex;gap:12px;padding:18px 0;}
.search-input{
  flex:1;height:48px;border-radius:var(--r-input);background:#0C1424;
  border:1px solid var(--line);padding:0 16px;color:var(--text-1);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search-input::placeholder{color:var(--text-3);}
.search-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,124,255,.22);}
.mobile-drawer{max-height:0;overflow:hidden;transition:max-height .28s var(--ease);background:rgba(5,8,15,.97);}
.mobile-drawer.open{max-height:420px;border-bottom:1px solid var(--line);}
.drawer-inner{padding:10px 0 22px;}
.drawer-link{display:block;padding:14px 4px;font-size:16px;color:var(--text-2);border-bottom:1px solid var(--line);}
.drawer-link.active{color:var(--brand);}

/* ============ 按钮体系 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;white-space:nowrap;border:1px solid transparent;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--accent);color:#0A1410;box-shadow:var(--glow);}
.btn-primary:hover{color:#0A1410;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(200,245,90,.5),0 16px 34px -8px rgba(200,245,90,.6);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{border-color:var(--line-strong);color:var(--text-1);border-radius:12px;background:rgba(255,255,255,.02);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(47,124,255,.1);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-mini{height:32px;padding:0 14px;font-size:13px;border-radius:10px;}
.btn:disabled,.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.btn-loading{opacity:.75;pointer-events:none;}

/* ============ Hero ============ */
.hero{position:relative;padding:150px 0 96px;overflow:hidden;}
.hero-glow{
  position:absolute;top:-260px;left:50%;transform:translateX(-50%);
  width:1100px;height:620px;pointer-events:none;
  background:radial-gradient(closest-side,rgba(47,124,255,.18),transparent 72%);
}
.hero-grid-bg{
  position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,170,255,.06) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,170,255,.06) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse at 28% 18%,#000 0%,transparent 72%);
  mask-image:radial-gradient(ellipse at 28% 18%,#000 0%,transparent 72%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand-2);
  border:1px solid rgba(53,224,214,.3);background:rgba(53,224,214,.08);
  padding:5px 12px;border-radius:var(--r-pill);margin-bottom:22px;
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);display:block;}
.hero h1{font-size:44px;max-width:620px;}
.hero-sub{margin-top:20px;font-size:18px;line-height:1.75;color:var(--text-2);max-width:560px;}
.hero-cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap;}
.hero-stats{display:flex;align-items:center;gap:26px;margin-top:44px;flex-wrap:wrap;}
.hero-stats li{display:flex;align-items:baseline;gap:8px;}
.hero-stats li+li{padding-left:26px;border-left:1px solid var(--line);}
.hero-stats strong{font-size:26px;color:var(--accent);font-variant-numeric:tabular-nums;font-weight:700;}
.hero-stats span{font-size:13px;color:var(--text-3);}
.hero-right{position:relative;}
.hero-visual{
  position:relative;min-height:430px;border-radius:22px;overflow:hidden;
  border:1px solid var(--line-strong);
  background:#0A1020 url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  box-shadow:var(--sh-1);
}
.hero-visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(5,8,15,.15),rgba(5,8,15,.82));
}
.hero-visual::before{
  content:"";position:absolute;right:-60px;bottom:-60px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(53,224,214,.35),transparent 70%);pointer-events:none;
}
.hero-card{
  position:absolute;left:-28px;bottom:-26px;width:300px;padding:22px;
  border-radius:var(--r-card);
  background:var(--surface-3);
  border:1px solid var(--line-strong);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--sh-1),inset 0 1px 0 rgba(255,255,255,.06);
}
.hc-tag{font-size:12px;color:var(--accent);letter-spacing:.05em;}
.hc-title{margin-top:8px;font-size:17px;font-weight:600;}
.hc-params{margin-top:12px;font-size:13px;color:var(--text-2);display:flex;flex-wrap:wrap;gap:8px;}
.hc-params span{padding:3px 9px;border:1px solid var(--line);border-radius:var(--r-pill);font-variant-numeric:tabular-nums;}
.hero-card .btn{margin-top:16px;width:100%;}

/* ============ 主推网格 ============ */
.lead-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.card{
  position:relative;display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface-1);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(47,124,255,.55);box-shadow:var(--sh-2);}
.card-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:linear-gradient(140deg,#0C1424,#070C16);}
.card-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s var(--ease);}
.card:hover .card-thumb img{transform:scale(1.03);}
.card-badge{
  position:absolute;top:12px;left:12px;z-index:2;font-size:12px;line-height:1;
  padding:6px 10px;border-radius:var(--r-pill);
  background:rgba(200,245,90,.16);color:var(--accent);border:1px solid rgba(200,245,90,.35);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.card-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.card-title{font-size:18px;font-weight:600;line-height:1.45;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-desc{font-size:14px;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{font-size:12px;line-height:1;padding:5px 10px;border-radius:var(--r-pill);
  background:rgba(47,124,255,.1);color:var(--brand-2);border:1px solid rgba(53,224,214,.2);font-variant-numeric:tabular-nums;}
.card-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;}
.price{color:var(--accent);font-weight:700;font-size:16px;font-variant-numeric:tabular-nums;}
.price small{color:var(--text-3);font-weight:400;font-size:12px;margin-left:2px;}
.lead-lg{grid-column:span 4;grid-row:span 2;}
.lead-lg .card-thumb{aspect-ratio:auto;flex:1;min-height:280px;}
.lead-lg .card-title{font-size:22px;}
.lead-sm{grid-column:span 2;}

/* ============ 评价轮播 ============ */
.testi-wrap{position:relative;}
.testi-track{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 4px 20px;scrollbar-width:none;-ms-overflow-style:none;
}
.testi-track::-webkit-scrollbar{display:none;}
.testi-card{
  flex:0 0 calc((100% - 40px)/3);scroll-snap-align:start;
  padding:24px;border-radius:var(--r-card);
  background:var(--surface-3);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--sh-1),inset 0 1px 0 rgba(255,255,255,.06);
}
.testi-head{display:flex;align-items:center;gap:12px;}
.avatar{
  width:40px;height:40px;border-radius:50%;display:grid;place-items:center;flex-shrink:0;
  font-size:15px;font-weight:700;color:#04131C;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
}
.testi-name{font-size:15px;font-weight:600;}
.testi-role{font-size:12px;color:var(--text-3);}
.stars{margin-left:auto;color:var(--accent);font-size:13px;letter-spacing:2px;}
.testi-text{margin-top:16px;font-size:14px;line-height:1.8;color:var(--text-2);}
.testi-nav{display:flex;align-items:center;gap:12px;justify-content:center;margin-top:12px;}
.circle-btn{
  width:40px;height:40px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line-strong);background:var(--surface-3);color:var(--text-2);
  transition:all .2s var(--ease);
}
.circle-btn:hover{color:var(--accent);border-color:var(--accent);box-shadow:0 0 0 1px rgba(200,245,90,.35);}
.testi-dots{display:flex;gap:8px;margin:0 8px;}
.dot{width:8px;height:8px;border-radius:50%;background:rgba(120,170,255,.28);transition:all .2s var(--ease);}
.dot.active{background:var(--accent);box-shadow:0 0 10px rgba(200,245,90,.8);width:20px;border-radius:4px;}

/* ============ 服务保障条 ============ */
.assure{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.assure-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.assure-item{padding:34px 26px;display:flex;gap:14px;align-items:flex-start;}
.assure-item+.assure-item{border-left:1px solid var(--line);}
.assure-icon{
  width:38px;height:38px;border-radius:11px;flex-shrink:0;display:grid;place-items:center;
  border:1px solid var(--line-strong);color:var(--brand-2);background:rgba(47,124,255,.08);
}
.assure-title{font-size:15px;font-weight:600;margin-bottom:6px;}
.assure-desc{font-size:13px;color:var(--text-2);line-height:1.7;}

/* ============ 最新信息 CMS ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface-1);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(47,124,255,.5);box-shadow:var(--sh-2);}
.news-thumb{display:block;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(140deg,#0C1424,#070C16);}
.news-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s var(--ease);}
.news-card:hover .news-thumb img{transform:scale(1.03);}
.news-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-cat{align-self:flex-start;font-size:12px;line-height:1;padding:5px 10px;border-radius:var(--r-pill);
  background:rgba(53,224,214,.1);color:var(--brand-2);border:1px solid rgba(53,224,214,.22);}
.news-title{font-size:17px;font-weight:600;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-desc{font-size:14px;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums;}
.empty-state{
  grid-column:1/-1;min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  border:1px dashed var(--line-strong);border-radius:var(--r-card);background:var(--surface-1);text-align:center;padding:30px;
}
.empty-state p{font-size:14px;color:var(--text-2);}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{
  border:1px solid var(--line);border-radius:12px;overflow:hidden;
  background:var(--surface-3);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  transition:border-color .2s var(--ease);
}
.faq-item.active{border-color:rgba(47,124,255,.6);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;text-align:left;font-size:16px;font-weight:600;color:var(--text-1);
}
.faq-plus{
  position:relative;width:18px;height:18px;flex-shrink:0;transition:transform .24s var(--ease);
}
.faq-plus::before,.faq-plus::after{
  content:"";position:absolute;background:var(--brand-2);border-radius:2px;
}
.faq-plus::before{left:0;top:8px;width:18px;height:2px;}
.faq-plus::after{top:0;left:8px;width:2px;height:18px;}
.faq-item.active .faq-plus{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease);}
.faq-a p{padding:0 22px 22px;font-size:14px;color:var(--text-2);line-height:1.85;max-width:760px;}

/* ============ CTA 表单 ============ */
.cta-card{
  border-radius:24px;border:1px solid var(--line-strong);
  background:linear-gradient(150deg,rgba(18,28,48,.72),rgba(8,13,24,.9));
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--sh-1),inset 0 1px 0 rgba(255,255,255,.06);
  padding:44px;display:grid;grid-template-columns:1.25fr .95fr;gap:48px;
}
.cta-card h2{font-size:30px;}
.cta-card .section-sub{margin-bottom:26px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1/-1;}
.field label{font-size:13px;color:var(--text-2);}
.input,.textarea{
  width:100%;height:48px;border-radius:var(--r-input);background:#0C1424;
  border:1px solid var(--line);padding:0 14px;color:var(--text-1);font-size:15px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),opacity .2s var(--ease);
}
.textarea{height:110px;padding:12px 14px;resize:vertical;line-height:1.7;}
.input::placeholder,.textarea::placeholder{color:var(--text-3);}
.input:focus,.textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,124,255,.2);}
.input.error,.textarea.error{border-color:var(--err);box-shadow:0 0 0 3px rgba(255,107,107,.16);}
.input:disabled,.textarea:disabled{opacity:.4;cursor:not-allowed;}
.form-msg{font-size:13px;margin-top:12px;min-height:20px;}
.form-msg.ok{color:var(--ok);}
.form-msg.err{color:var(--err);}
.cta-side{display:flex;flex-direction:column;gap:20px;border-left:1px solid var(--line);padding-left:44px;}
.point-list{display:flex;flex-direction:column;gap:18px;}
.point-list li{display:flex;gap:12px;align-items:flex-start;font-size:14px;color:var(--text-2);line-height:1.75;}
.point-list svg{flex-shrink:0;margin-top:4px;color:var(--accent);}
.cta-contact{margin-top:auto;font-size:14px;color:var(--text-2);}
.cta-contact strong{display:block;font-size:22px;color:var(--text-1);font-variant-numeric:tabular-nums;margin-top:6px;}

/* ============ 页脚 ============ */
.site-footer{background:var(--surface-2);border-top:1px solid var(--line);position:relative;padding:70px 0 0;}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--brand),transparent 60%);
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.foot-brand p{margin-top:16px;font-size:13px;color:var(--text-2);line-height:1.8;max-width:300px;}
.socials{display:flex;gap:12px;margin-top:20px;}
.socials a{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--text-2);transition:all .2s var(--ease);
}
.socials a:hover{color:var(--accent);border-color:rgba(200,245,90,.5);}
.foot-col h4{font-size:14px;margin-bottom:16px;color:var(--text-1);}
.foot-col ul{display:flex;flex-direction:column;gap:11px;}
.foot-col a,.foot-col span{font-size:13px;color:var(--text-2);}
.foot-bottom{
  margin-top:52px;padding:22px 0 26px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ============ 移动端底部 Tab ============ */
.bottom-tabs{
  position:fixed;left:0;right:0;bottom:0;z-index:300;display:none;
  height:64px;padding-bottom:env(safe-area-inset-bottom);
  background:rgba(6,10,20,.94);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  border-top:1px solid var(--line);
}
.tab-item{
  flex:1;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  font-size:11px;color:var(--text-3);
}
.tab-item.active{color:var(--brand);}
.tab-item.active::after{
  content:"";position:absolute;bottom:7px;width:4px;height:4px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 8px var(--accent);
}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .hero h1{font-size:40px;}
}
@media (max-width:1023px){
  .section{padding:80px 0;}
  h1,.hero h1{font-size:34px;}
  h2,.section-head h2{font-size:26px;}
  h3{font-size:20px;}
  .hero{padding:130px 0 80px;}
  .hero-inner{grid-template-columns:1fr;gap:44px;}
  .hero-visual{min-height:320px;}
  .hero-card{position:relative;left:0;bottom:0;width:100%;margin-top:-40px;}
  .lead-lg{grid-column:span 6;grid-row:auto;}
  .lead-lg .card-thumb{min-height:200px;}
  .lead-sm{grid-column:span 6;}
  .testi-card{flex:0 0 calc((100% - 20px)/2);}
  .assure-grid{grid-template-columns:repeat(2,1fr);}
  .assure-item+.assure-item{border-left:0;}
  .assure-item:nth-child(even){border-left:1px solid var(--line);}
  .assure-item:nth-child(n+3){border-top:1px solid var(--line);}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .cta-card{grid-template-columns:1fr;gap:32px;padding:32px;}
  .cta-side{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:28px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .section{padding:56px 0;}
  h1,.hero h1{font-size:28px;}
  h2,.section-head h2{font-size:22px;}
  h3{font-size:18px;}
  body{font-size:16px;line-height:1.85;}
  .nav-main{display:none;}
  .hamburger{display:grid;}
  .nav-actions .btn{display:none;}
  .nav-inner{height:64px;}
  .site-header.scrolled .nav-inner{height:58px;}
  .hero{padding:104px 0 60px;}
  .hero-cta .btn{width:100%;height:52px;}
  .hero-stats{gap:16px;}
  .hero-stats li+li{padding-left:16px;}
  .hero-stats strong{font-size:22px;}
  .lead-grid{gap:16px;}
  .lead-lg,.lead-sm{grid-column:span 12;}
  .testi-card{flex:0 0 88%;}
  .assure-grid{grid-template-columns:1fr;}
  .assure-item{border-left:0 !important;padding:22px 20px;}
  .assure-item+.assure-item{border-top:1px solid var(--line);}
  .news-grid{grid-template-columns:1fr;}
  .form-grid{grid-template-columns:1fr;}
  .faq-q{font-size:15px;padding:16px;}
  .faq-a p{padding:0 16px 18px;}
  .cta-card{padding:24px;border-radius:18px;}
  .cta-card h2{font-size:22px;}
  .foot-grid{grid-template-columns:1fr;gap:28px;}
  .foot-bottom{flex-direction:column;gap:8px;}
  .bottom-tabs{display:flex;}
  body{padding-bottom:64px;}
}
@media (max-width:479px){
  .container{padding:0 16px;}
  .card-body,.news-body{padding:16px;}
  .hero-card{padding:18px;}
}

/* ============ 无障碍动效 ============ */
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: article */
:root{
  --bg-900:#05080F;
  --surface-1:#0A1020;
  --surface-2:#0E1728;
  --surface-3:rgba(18,28,48,.55);
  --brand:#2F7CFF;
  --brand-2:#35E0D6;
  --accent:#C8F55A;
  --text-1:#E8EEF9;
  --text-2:#A8B6CE;
  --text-3:#6E7E96;
  --line:rgba(120,170,255,.14);
  --line-strong:rgba(120,170,255,.28);
  --ok:#35E0D6;
  --warn:#FFB547;
  --err:#FF6B6B;
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --r-pill:999px;
  --shadow-1:0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-2:0 16px 40px -16px rgba(47,124,255,.35);
  --glow-cta:0 0 0 1px rgba(200,245,90,.35),0 8px 24px -6px rgba(200,245,90,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:72px;
  --glass-hi:inset 0 1px 0 rgba(255,255,255,.06);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
svg{display:block}
::selection{background:rgba(47,124,255,.35);color:#fff}
:focus-visible{outline:none;box-shadow:0 0 0 2px var(--brand),0 0 0 6px rgba(47,124,255,.22);border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:rgba(5,8,15,.72);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:height .24s var(--ease),background .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.shrink{background:rgba(6,10,20,.9);box-shadow:0 12px 32px -20px rgba(0,0,0,.9)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:var(--nav-h);transition:height .24s var(--ease)}
.site-header.shrink .nav-inner{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;
  font-size:13px;font-weight:700;letter-spacing:.5px;
  color:#03121F;
  background:linear-gradient(135deg,var(--brand-2),var(--accent));
  box-shadow:0 6px 18px -10px rgba(53,224,214,.8);
}
.logo-text{font-size:17px;font-weight:700;letter-spacing:.5px;color:var(--text-1)}
.logo:hover .logo-text{color:var(--brand-2)}
.nav-main{display:flex;align-items:center;gap:6px;flex:1 1 auto;justify-content:center}
.nav-link{
  position:relative;padding:8px 12px;font-size:15px;color:var(--text-2);
  border-radius:10px;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--brand);opacity:0;transform:translateY(3px);
  transition:opacity .18s var(--ease),transform .18s var(--ease);
}
.nav-link:hover{color:var(--text-1)}
.nav-link:hover::after{opacity:.55;transform:translateY(0)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{opacity:1;transform:translateY(0);box-shadow:0 0 12px rgba(47,124,255,.85)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.icon-btn{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--text-2);
  transition:color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),background .18s var(--ease);
}
.icon-btn:hover{color:var(--brand-2);border-color:var(--line-strong);background:rgba(47,124,255,.08);transform:translateY(-2px)}
.menu-btn{display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);align-items:center;justify-content:center;color:var(--text-1)}
.menu-btn.on{color:var(--brand-2);border-color:var(--line-strong)}
.mobile-drawer{
  display:none;flex-direction:column;gap:4px;
  padding:12px 20px 20px;border-top:1px solid var(--line);
  background:rgba(8,13,26,.98);
}
.mobile-drawer.open{display:flex}
.mobile-drawer .nav-link{padding:12px 10px;font-size:16px;border-bottom:1px solid rgba(120,170,255,.08)}
.mobile-drawer .nav-link::after{display:none}
.mobile-drawer .nav-link.active{color:var(--brand-2);background:rgba(53,224,214,.06);border-radius:10px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);padding:0 24px;height:48px;
  font-size:15px;font-weight:600;letter-spacing:.2px;white-space:nowrap;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary{background:linear-gradient(120deg,var(--accent),#9FE04A);color:#0A1400;box-shadow:var(--glow-cta)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(200,245,90,.5),0 14px 34px -10px rgba(200,245,90,.6)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--text-1);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--line-strong);color:var(--brand-2);transform:translateY(-2px);background:rgba(47,124,255,.07)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:34px;padding:0 16px;font-size:13px}
.btn:disabled,.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}

/* ============ 内页头部 ============ */
.page-head{position:relative;overflow:hidden;padding:calc(var(--nav-h) + 34px) 0 10px}
.page-head::before{
  content:"";position:absolute;inset:0;
  background:url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  opacity:.16;
}
.page-head::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(560px 260px at 18% 0%,rgba(47,124,255,.20),transparent 70%),
    radial-gradient(420px 220px at 86% 6%,rgba(53,224,214,.10),transparent 72%),
    linear-gradient(180deg,rgba(5,8,15,.35),var(--bg-900) 88%);
}
.page-head .container{position:relative;z-index:2}

.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3);padding-top:12px}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--brand-2)}
.breadcrumb .sep{color:var(--text-3);opacity:.7}
.breadcrumb .now{color:var(--text-3);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章头部 ============ */
.article-head{padding:28px 0 0}
.post-tag{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12px;letter-spacing:.4px;
  color:var(--brand-2);background:rgba(53,224,214,.10);border:1px solid rgba(53,224,214,.22);
}
.article-title{
  margin:18px 0 0;font-size:44px;line-height:1.3;font-weight:700;letter-spacing:-.4px;
  max-width:880px;color:var(--text-1);
}
.meta-row{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  margin-top:18px;font-size:13px;color:var(--text-3);
}
.meta-row .dot{width:1px;height:12px;background:var(--line-strong);display:inline-block}
.meta-row b{color:var(--text-2);font-weight:500}
.cover{
  margin:32px 0 0;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);background:var(--surface-1);box-shadow:var(--shadow-1);
}
.cover img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0}
.cover figcaption{padding:12px 18px;font-size:13px;color:var(--text-3);border-top:1px solid var(--line)}

/* ============ 正文布局 ============ */
.article-section{padding:56px 0 0}
.article-layout{display:grid;grid-template-columns:minmax(0,760px) 280px;gap:56px;justify-content:center;align-items:start}
.article-main{min-width:0}
.article-body{color:var(--text-2);font-size:17px;line-height:1.85}
.article-body > *{max-width:760px}
.article-body p{margin:0 0 18px;color:var(--text-2)}
.article-body h2{
  font-size:28px;line-height:1.4;font-weight:700;color:var(--text-1);
  margin:40px 0 16px;padding-left:14px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--brand),var(--brand-2));
}
.article-body h3{font-size:20px;font-weight:600;color:var(--text-1);margin:28px 0 12px}
.article-body h4{font-size:17px;font-weight:600;color:var(--text-1);margin:22px 0 10px}
.article-body strong{color:var(--text-1);font-weight:600}
.article-body a{color:var(--brand-2);border-bottom:1px solid rgba(53,224,214,.35)}
.article-body a:hover{color:var(--accent);border-color:rgba(200,245,90,.55)}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:4px}
.article-body li{position:relative;padding-left:22px;margin-bottom:10px}
.article-body ul > li::before{
  content:"";position:absolute;left:2px;top:.68em;width:7px;height:7px;border-radius:2px;
  background:var(--accent);box-shadow:0 0 10px rgba(200,245,90,.5);
}
.article-body ol{counter-reset:oli}
.article-body ol > li{padding-left:30px;counter-increment:oli}
.article-body ol > li::before{
  content:counter(oli);position:absolute;left:0;top:.15em;width:20px;height:20px;
  display:flex;align-items:center;justify-content:center;border-radius:6px;
  font-size:12px;font-weight:700;color:var(--brand-2);
  background:rgba(47,124,255,.12);border:1px solid rgba(47,124,255,.28);
}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;border-left:3px solid var(--brand);
  border-radius:0 var(--r-input) var(--r-input) 0;
  background:var(--surface-3);box-shadow:var(--glass-hi);
  color:var(--text-1);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{margin:24px 0;border-radius:var(--r-img);border:1px solid var(--line)}
.article-body figure{margin:26px 0}
.article-body figcaption{margin-top:10px;font-size:13px;color:var(--text-3);text-align:center}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;
  border:1px solid var(--line);border-radius:var(--r-input);overflow:hidden;
}
.article-body th{
  background:var(--surface-2);color:var(--text-1);font-weight:600;
  text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);
}
.article-body td{padding:12px 14px;border-bottom:1px solid rgba(120,170,255,.08);color:var(--text-2)}
.article-body tr:last-child td{border-bottom:0}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;
  padding:2px 7px;border-radius:6px;background:#0C1424;color:var(--brand-2);
  border:1px solid var(--line);
}
.article-body pre{
  margin:24px 0;padding:18px;border-radius:var(--r-input);overflow-x:auto;
  background:#0C1424;border:1px solid var(--line);
}
.article-body pre code{background:none;border:0;padding:0;color:var(--text-1)}
.article-body hr{border:0;height:1px;background:var(--line);margin:32px 0}

.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  min-height:260px;padding:40px 24px;text-align:center;
  background:var(--surface-1);border:1px solid var(--line);border-radius:var(--r-card);color:var(--text-3);
}
.empty-state svg{color:var(--brand);opacity:.8}
.empty-state p{font-size:15px;color:var(--text-2)}

/* ============ 右栏 ============ */
.article-aside{position:sticky;top:calc(var(--nav-h) + 20px);display:flex;flex-direction:column;gap:18px}
.aside-card{
  background:var(--surface-3);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--shadow-1),var(--glass-hi);
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
}
.aside-card h3{font-size:15px;font-weight:600;color:var(--text-1);margin-bottom:14px;letter-spacing:.3px}
.aside-list li + li{margin-top:10px}
.aside-list a{font-size:14px;color:var(--text-2);display:flex;align-items:center;gap:8px}
.aside-list a::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--brand);flex:0 0 auto;opacity:.7}
.aside-list a:hover{color:var(--brand-2)}
.aside-cta p{font-size:14px;color:var(--text-2);line-height:1.75;margin-bottom:16px}
.aside-cta .btn{width:100%;height:42px;font-size:14px}
.aside-facts{display:flex;flex-direction:column;gap:12px}
.aside-facts li{display:flex;justify-content:space-between;gap:10px;font-size:13px;color:var(--text-3);border-bottom:1px solid rgba(120,170,255,.08);padding-bottom:10px}
.aside-facts li:last-child{border-bottom:0;padding-bottom:0}
.aside-facts b{color:var(--brand-2);font-weight:600}

/* ============ 相关推荐 ============ */
.related{padding:80px 0 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
.sec-head h2{font-size:26px;font-weight:700;letter-spacing:-.2px}
.sec-head .more{font-size:14px;color:var(--text-2);display:inline-flex;align-items:center;gap:6px}
.sec-head .more:hover{color:var(--accent)}
.sec-head .more:hover svg{transform:translateX(2px)}
.sec-head .more svg{transition:transform .18s var(--ease)}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rel-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface-1);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(47,124,255,.55);box-shadow:var(--shadow-2)}
.rel-card .thumb{overflow:hidden;background:#0C1424}
.rel-card .thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;transition:transform .3s var(--ease)}
.rel-card:hover .thumb img{transform:scale(1.03)}
.rel-card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-card .body h3{font-size:17px;font-weight:600;line-height:1.55;color:var(--text-1)}
.rel-card .body p{font-size:14px;color:var(--text-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto}
.chip{
  font-size:12px;line-height:1;padding:7px 10px;border-radius:var(--r-pill);
  color:var(--text-2);background:rgba(47,124,255,.10);border:1px solid var(--line);
}

/* ============ 返回入口 ============ */
.back-nav{padding:56px 0 0}
.back-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.back-item{
  display:flex;flex-direction:column;gap:8px;padding:22px 24px;
  background:var(--surface-1);border:1px solid var(--line);border-radius:var(--r-card);
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.back-item:hover{border-color:rgba(47,124,255,.5);transform:translateY(-3px);box-shadow:var(--shadow-2)}
.back-item span{font-size:12px;color:var(--text-3);letter-spacing:.5px}
.back-item strong{font-size:16px;font-weight:600;color:var(--text-1)}
.back-item .line{font-size:14px;color:var(--text-2);line-height:1.7}
.center-link{margin-top:22px;text-align:center;font-size:14px}
.center-link a{color:var(--text-2);border-bottom:1px solid transparent}
.center-link a:hover{color:var(--brand-2);border-color:rgba(53,224,214,.5)}

/* ============ CTA ============ */
.cta-band{padding:96px 0 0}
.cta-card{
  position:relative;overflow:hidden;
  display:grid;grid-template-columns:1.35fr .95fr;gap:40px;align-items:center;
  padding:48px;border-radius:26px;
  background:linear-gradient(140deg,rgba(20,34,60,.85),rgba(10,16,32,.9));
  border:1px solid var(--line-strong);
  box-shadow:0 30px 70px -40px rgba(47,124,255,.6),var(--glass-hi);
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
}
.cta-card::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(420px 220px at 12% 0%,rgba(47,124,255,.22),transparent 70%),radial-gradient(360px 200px at 92% 100%,rgba(53,224,214,.14),transparent 70%);
}
.cta-card > *{position:relative;z-index:2}
.cta-card h2{font-size:30px;font-weight:700;line-height:1.4;letter-spacing:-.3px}
.cta-card p{margin-top:14px;font-size:15px;color:var(--text-2);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.cta-points{display:flex;flex-direction:column;gap:14px}
.cta-points li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text-2)}
.cta-points svg{flex:0 0 auto;margin-top:5px;color:var(--accent)}
.cta-points b{color:var(--text-1);font-weight:600}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:110px;background:var(--surface-2);position:relative;
  border-top:1px solid var(--line);padding:64px 0 28px;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--brand),rgba(47,124,255,0));
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand p{margin-top:16px;font-size:14px;color:var(--text-2);max-width:340px;line-height:1.8}
.socials{display:flex;gap:10px;margin-top:20px}
.socials a{
  width:38px;height:38px;border-radius:12px;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--text-2);
  transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),background .2s var(--ease);
}
.socials a:hover{color:var(--accent);border-color:rgba(200,245,90,.45);background:rgba(200,245,90,.06);transform:translateY(-2px)}
.foot-col h4{font-size:15px;font-weight:600;color:var(--text-1);margin-bottom:16px}
.foot-col ul{display:flex;flex-direction:column;gap:12px}
.foot-col li{font-size:14px;color:var(--text-2)}
.foot-col a{color:var(--text-2)}
.foot-col a:hover{color:var(--brand-2)}
.foot-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}

/* ============ 移动端底部 Tab ============ */
.tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:90;
  height:calc(64px + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(8,13,26,.94);
  backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);
  border-top:1px solid var(--line);
}
.tab-item{
  position:relative;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  font-size:11px;color:var(--text-3);
}
.tab-item svg{width:24px;height:24px;stroke-width:1.7}
.tab-item.active{color:var(--brand-2)}
.tab-item.active::after{
  content:"";position:absolute;top:8px;width:4px;height:4px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 8px rgba(200,245,90,.9);
}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr) 260px;gap:40px}
  .article-title{font-size:38px}
}
@media (max-width:1023px){
  .nav-main{display:none}
  .menu-btn{display:inline-flex}
  .nav-inner{gap:14px}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .article-aside{position:static;margin-top:40px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
  .article-title{font-size:34px}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-card{grid-template-columns:1fr;padding:36px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{padding-bottom:calc(64px + env(safe-area-inset-bottom));font-size:16px}
  .container{padding:0 16px}
  .icon-btn{display:none}
  .nav-actions .btn{display:none}
  .tabbar{display:flex}
  .page-head{padding-top:calc(var(--nav-h) + 20px)}
  .article-title{font-size:28px;margin-top:14px}
  .meta-row{gap:8px}
  .article-section{padding-top:40px}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:22px;margin-top:34px}
  .article-body h3{font-size:18px}
  .article-aside{grid-template-columns:minmax(0,1fr)}
  .rel-grid{grid-template-columns:minmax(0,1fr)}
  .back-grid{grid-template-columns:minmax(0,1fr)}
  .sec-head{flex-direction:column;align-items:flex-start;gap:10px}
  .sec-head h2{font-size:22px}
  .cta-band{padding-top:64px}
  .cta-card{padding:26px 20px;border-radius:20px;gap:26px}
  .cta-card h2{font-size:23px}
  .cta-actions{flex-direction:column;gap:12px}
  .cta-actions .btn{width:100%;height:52px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .site-footer{margin-top:72px;padding-top:48px}
  .related{padding-top:56px}
}
@media (max-width:479px){
  .article-title{font-size:25px}
  .logo-text{font-size:16px}
  .rel-card .body{padding:16px}
  .aside-card{padding:16px}
  .breadcrumb .now{max-width:200px}
}

/* roulang page: category1 */
:root{
  --bg-900:#05080F;
  --surface-1:#0A1020;
  --surface-2:#0E1728;
  --surface-3:rgba(18,28,48,.55);
  --brand:#2F7CFF;
  --brand-2:#35E0D6;
  --accent:#C8F55A;
  --text-1:#E8EEF9;
  --text-2:#A8B6CE;
  --text-3:#6E7E96;
  --ok:#35E0D6;
  --warn:#FFB547;
  --err:#FF6B6B;
  --line:rgba(120,170,255,.14);
  --line-strong:rgba(120,170,255,.24);
  --radius-card:18px;
  --radius-img:14px;
  --radius-input:12px;
  --shadow-1:0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-hover:0 16px 40px -16px rgba(47,124,255,.35);
  --glow:0 0 0 1px rgba(200,245,90,.35), 0 8px 24px -6px rgba(200,245,90,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-2)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:6px;
}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;letter-spacing:.2px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
.tnum{font-variant-numeric:tabular-nums}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(5,8,15,.82);
  backdrop-filter:blur(14px) saturate(130%);
  border-bottom:1px solid var(--line);
  transition:height .24s var(--ease),background .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,10,20,.72);
  box-shadow:0 10px 30px -20px rgba(0,0,0,.9);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:78px;
  transition:height .24s var(--ease);
}
.site-header.is-scrolled .header-inner{height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;color:var(--text-1)}
.logo:hover{color:var(--text-1)}
.logo-mark{
  width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;
  font-size:14px;font-weight:700;letter-spacing:1px;
  color:#04101F;
  background:linear-gradient(135deg,var(--accent),var(--brand-2));
  box-shadow:0 6px 18px -8px rgba(53,224,214,.7);
}
.logo-text{font-size:18px;font-weight:700;letter-spacing:.5px}
.nav-main{display:flex;align-items:center;gap:6px;margin-left:8px}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 14px;
  font-size:15px;
  color:var(--text-2);
  border-radius:10px;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  box-shadow:0 0 10px rgba(47,124,255,.7);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--text-1);background:rgba(47,124,255,.08)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--brand)}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.icon-btn{
  width:40px;height:40px;border-radius:12px;
  display:grid;place-items:center;
  border:1px solid var(--line);
  background:rgba(18,28,48,.5);
  color:var(--text-2);
  cursor:pointer;
  transition:all .2s var(--ease);
}
.icon-btn:hover{color:var(--text-1);border-color:var(--line-strong);transform:translateY(-1px)}
.menu-btn{display:none}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:none;cursor:pointer;
  font-size:15px;font-weight:600;
  padding:0 24px;height:46px;
  border-radius:999px;
  transition:all .2s var(--ease);
  white-space:nowrap;
}
.btn-sm{height:36px;padding:0 18px;font-size:14px}
.btn-primary{
  color:#08150C;
  background:linear-gradient(135deg,var(--accent),#A6E633);
  box-shadow:var(--glow);
}
.btn-primary:hover{transform:translateY(-2px);color:#08150C;box-shadow:0 0 0 1px rgba(200,245,90,.5),0 14px 30px -8px rgba(200,245,90,.6)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  color:var(--text-1);
  background:transparent;
  border:1px solid var(--line-strong);
  border-radius:12px;
}
.btn-ghost:hover{color:var(--text-1);border-color:var(--brand);background:rgba(47,124,255,.1);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
}
.text-link svg{transition:transform .2s var(--ease)}
.text-link:hover svg{transform:translateX(3px)}

/* ============ 面包屑 ============ */
.crumb{padding:22px 0 0;font-size:13px;color:var(--text-3)}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li+li::before{content:"›";color:var(--text-3)}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--brand)}
.crumb .current{color:var(--text-3)}

/* ============ 分类 Hero ============ */
.cat-hero{
  position:relative;
  overflow:hidden;
  padding:44px 0 52px;
  background:
    radial-gradient(760px 320px at 18% -30%, rgba(47,124,255,.20), transparent 70%),
    linear-gradient(180deg,rgba(10,16,32,.4),rgba(5,8,15,0)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat,
    var(--surface-1);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(5,8,15,.94) 0%,rgba(5,8,15,.78) 46%,rgba(5,8,15,.55) 100%),
    linear-gradient(180deg,rgba(5,8,15,.3),rgba(5,8,15,.9));
  pointer-events:none;
}
.cat-hero .container{position:relative;z-index:2}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:1.4px;
  color:var(--brand-2);
  padding:6px 12px;border-radius:999px;
  background:rgba(53,224,214,.1);
  border:1px solid rgba(53,224,214,.28);
  margin-bottom:16px;
}
.cat-hero h1{font-size:42px;max-width:760px}
.cat-hero h1 em{font-style:normal;color:var(--accent)}
.cat-hero .lede{
  margin-top:14px;
  max-width:700px;
  font-size:16px;
  color:var(--text-2);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:22px;
  margin-top:28px;padding-top:22px;
  border-top:1px solid var(--line);
}
.hero-facts .fact{position:relative;padding-right:22px}
.hero-facts .fact+.fact{padding-left:22px}
.hero-facts .fact+.fact::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:1px;background:var(--line);
}
.fact b{display:block;font-size:24px;color:var(--accent);font-variant-numeric:tabular-nums;line-height:1.2}
.fact span{font-size:13px;color:var(--text-3)}

/* ============ 锚点标签条 ============ */
.chip-bar{
  position:sticky;
  top:64px;
  z-index:60;
  background:rgba(6,11,22,.92);
  backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.chip-row{
  display:flex;
  gap:8px;
  overflow-x:auto;
  padding:14px 0;
  scrollbar-width:none;
}
.chip-row::-webkit-scrollbar{display:none}
.chip{
  flex:0 0 auto;
  padding:7px 16px;
  font-size:13px;
  color:var(--text-2);
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(18,28,48,.45);
  transition:all .2s var(--ease);
}
.chip:hover{color:var(--text-1);border-color:var(--line-strong);transform:translateY(-1px)}
.chip.active{
  color:#08150C;
  background:var(--accent);
  border-color:transparent;
  font-weight:600;
}

/* ============ 通用板块 ============ */
.section{padding:84px 0}
.section--alt{background:var(--surface-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:40px}
.section-head h2{font-size:31px}
.section-head p{margin-top:12px;color:var(--text-2);font-size:15px}

/* ============ 图文交错流 ============ */
.flow{display:flex;flex-direction:column;gap:28px}
.flow-item{
  display:grid;
  grid-template-columns:5.4fr 6.6fr;
  gap:0;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:linear-gradient(150deg,rgba(18,28,48,.55),rgba(10,16,32,.72));
  box-shadow:var(--shadow-1);
  overflow:hidden;
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
  scroll-margin-top:140px;
}
.flow-item:nth-child(even){grid-template-columns:6.6fr 5.4fr}
.flow-item:nth-child(even) .flow-media{order:2}
.flow-item:nth-child(even) .flow-body{order:1}
.flow-item:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.flow-media{position:relative;min-height:290px;background:var(--surface-2);overflow:hidden}
.flow-media img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;transition:transform .4s var(--ease)}
.flow-item:hover .flow-media img{transform:scale(1.03)}
.flow-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.05),rgba(5,8,15,.55));
}
.flow-index{
  position:absolute;left:18px;top:18px;z-index:2;
  font-size:12px;letter-spacing:1px;
  padding:5px 11px;border-radius:999px;
  color:#04101F;font-weight:700;
  background:linear-gradient(135deg,var(--brand-2),var(--brand));
  font-variant-numeric:tabular-nums;
}
.flow-body{padding:30px 34px;display:flex;flex-direction:column;gap:14px}
.flow-body h3{font-size:21px}
.flow-body p{color:var(--text-2);font-size:15px;max-width:640px}
.spec-tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  font-size:12px;line-height:1;
  padding:7px 11px;border-radius:999px;
  color:var(--brand-2);
  background:rgba(53,224,214,.1);
  border:1px solid rgba(53,224,214,.24);
  white-space:nowrap;
}
.flow-foot{
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.flow-price{font-size:15px;color:var(--text-3)}
.flow-price b{font-size:22px;color:var(--accent);font-variant-numeric:tabular-nums}

/* ============ 参数对照条 ============ */
.compare{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface-3);
  backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow-1),inset 0 1px 0 rgba(255,255,255,.06);
  overflow:hidden;
}
.compare-row{
  display:grid;
  grid-template-columns:150px 1fr 130px;
  gap:20px;
  align-items:center;
  padding:20px 26px;
  border-top:1px solid var(--line);
  transition:background .2s var(--ease);
}
.compare-row:first-child{border-top:none;background:rgba(14,23,40,.9)}
.compare-row:not(:first-child):hover{background:var(--surface-2)}
.compare-row .label{font-size:14px;font-weight:600;color:var(--text-1)}
.compare-row .desc{font-size:14px;color:var(--text-2)}
.compare-row .value{
  text-align:right;font-size:17px;font-weight:700;
  color:var(--accent);font-variant-numeric:tabular-nums;
}
.compare-row.head .label,
.compare-row.head .desc{color:var(--text-3);font-weight:500;font-size:13px}
.compare-row.head .value{color:var(--text-3);font-size:13px;font-weight:500}

/* ============ FAQ ============ */
.faq{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--surface-3);
  backdrop-filter:blur(18px) saturate(140%);
  overflow:hidden;
  transition:border-color .2s var(--ease);
}
.faq-item.open{border-color:rgba(47,124,255,.55)}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;
  background:none;border:none;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--text-1);text-align:left;
}
.faq-q .plus{
  flex:0 0 auto;
  width:22px;height:22px;position:relative;
  transition:transform .24s var(--ease);
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
}
.faq-q .plus::before{left:0;right:0;top:10px;height:2px}
.faq-q .plus::after{top:0;bottom:0;left:10px;width:2px}
.faq-item.open .plus{transform:rotate(45deg)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .24s var(--ease);
}
.faq-a p{padding:0 22px 20px;color:var(--text-2);font-size:15px;max-width:760px}

/* ============ 相关阅读 ============ */
.readlist{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.read-item{
  display:flex;flex-direction:column;gap:10px;
  padding:20px 22px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:rgba(18,28,48,.4);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.read-item:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.read-item .k{font-size:12px;color:var(--brand-2);letter-spacing:.6px}
.read-item h3{font-size:17px;color:var(--text-1)}
.read-item p{font-size:14px;color:var(--text-3)}

/* ============ CTA ============ */
.cta-band{
  border:1px solid var(--line);
  border-radius:24px;
  padding:44px;
  display:grid;
  grid-template-columns:1.4fr .9fr;
  gap:36px;
  align-items:center;
  background:
    radial-gradient(600px 260px at 12% 0%,rgba(47,124,255,.22),transparent 70%),
    linear-gradient(120deg,rgba(14,23,40,.96),rgba(10,16,32,.9));
  box-shadow:var(--shadow-1),inset 0 1px 0 rgba(255,255,255,.06);
}
.cta-band h2{font-size:28px}
.cta-band p{margin-top:12px;color:var(--text-2);font-size:15px;max-width:520px}
.cta-points{display:flex;flex-direction:column;gap:12px}
.cta-points li{display:flex;gap:10px;font-size:14px;color:var(--text-2)}
.cta-points li::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--accent);margin-top:9px;flex:0 0 auto}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--surface-2);
  border-top:1px solid var(--line);
  margin-top:0;
  position:relative;
  padding:58px 0 0;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--brand),transparent 78%);
}
.foot-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:42px;
}
.foot-brand p{margin-top:14px;font-size:14px;color:var(--text-3);max-width:320px}
.socials{display:flex;gap:10px;margin-top:18px}
.socials a{
  width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;
  border:1px solid var(--line);
  color:var(--text-2);
  background:rgba(18,28,48,.5);
  transition:all .2s var(--ease);
}
.socials a:hover{color:var(--accent);border-color:rgba(200,245,90,.4);transform:translateY(-2px)}
.foot-col h4{font-size:15px;margin-bottom:16px;color:var(--text-1)}
.foot-col ul li{margin-bottom:11px}
.foot-col a,.foot-col span{font-size:14px;color:var(--text-3)}
.foot-col a:hover{color:var(--brand)}
.foot-bottom{
  border-top:1px solid var(--line);
  padding:20px 0 26px;
  display:flex;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-3);
}

/* ============ 移动端底部 Tab ============ */
.mobile-tab{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:90;
  height:64px;
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(8,13,24,.94);
  backdrop-filter:blur(16px);
  border-top:1px solid var(--line);
}
.mobile-tab ul{display:flex;height:100%}
.mobile-tab li{flex:1}
.mobile-tab a{
  height:100%;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  font-size:11px;color:var(--text-3);
  position:relative;
}
.mobile-tab a.active{color:var(--brand)}
.mobile-tab a.active::after{
  content:"";position:absolute;top:8px;right:calc(50% - 20px);
  width:4px;height:4px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 8px 1px rgba(200,245,90,.9);
}
.mobile-tab svg{width:24px;height:24px}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .cat-hero h1{font-size:38px}
}
@media (max-width:1023px){
  .nav-main{display:none}
  .nav-main.open{
    display:flex;
    position:absolute;
    top:100%;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    padding:12px 20px 18px;
    background:rgba(8,13,24,.98);
    border-bottom:1px solid var(--line);
    box-shadow:0 20px 40px -24px rgba(0,0,0,.95);
  }
  .nav-main.open .nav-link{padding:12px 14px}
  .nav-main.open .nav-link::after{display:none}
  .nav-main.open .nav-link.active{background:rgba(47,124,255,.12)}
  .menu-btn{display:grid}
  .header-inner{position:relative}
  .cat-hero h1{font-size:34px}
  .flow-item,.flow-item:nth-child(even){grid-template-columns:1fr}
  .flow-item:nth-child(even) .flow-media,
  .flow-item:nth-child(even) .flow-body{order:0}
  .flow-media{min-height:230px}
  .flow-body{padding:24px}
  .readlist{grid-template-columns:repeat(2,1fr)}
  .cta-band{grid-template-columns:1fr;padding:34px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
  .compare-row{grid-template-columns:130px 1fr 110px;padding:18px 20px}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .cat-hero{padding:30px 0 40px}
  .cat-hero h1{font-size:28px}
  .cat-hero .lede{font-size:15px}
  .hero-actions .btn{flex:1 1 100%;height:52px}
  .hero-facts{gap:0;flex-direction:column}
  .hero-facts .fact{padding:12px 0;border-bottom:1px solid var(--line)}
  .hero-facts .fact+.fact{padding-left:0}
  .hero-facts .fact+.fact::before{display:none}
  .chip-bar{top:64px}
  .section-head h2{font-size:24px}
  .flow-body h3{font-size:19px}
  .readlist{grid-template-columns:1fr}
  .compare-row{grid-template-columns:1fr;gap:6px;padding:18px}
  .compare-row .value{text-align:left}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .foot-bottom{flex-direction:column;gap:6px}
  .cta-band{padding:26px;border-radius:18px}
  .mobile-tab{display:block}
  body{padding-bottom:80px}
  .btn{height:48px}
}
@media (max-width:479px){
  .container{padding:0 16px}
  .cat-hero h1{font-size:26px}
  .section-head h2{font-size:22px}
  .flow-body{padding:18px}
  .flow-media{min-height:190px}
  .logo-text{font-size:16px}
  .logo-mark{width:34px;height:34px;border-radius:10px}
}

/* roulang page: category2 */
:root{
  --bg-900:#05080F;
  --surface-1:#0A1020;
  --surface-2:#0E1728;
  --surface-3:rgba(18,28,48,.55);
  --brand:#2F7CFF;
  --brand-2:#35E0D6;
  --accent:#C8F55A;
  --ok:#35E0D6;
  --warn:#FFB547;
  --err:#FF6B6B;
  --text-1:#E8EEF9;
  --text-2:#A8B6CE;
  --text-3:#6E7E96;
  --line:rgba(120,170,255,.14);
  --line-strong:rgba(120,170,255,.3);
  --radius-card:18px;
  --radius-img:14px;
  --radius-input:12px;
  --shadow-card:0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-hover:0 16px 40px -16px rgba(47,124,255,.35);
  --shadow-cta:0 0 0 1px rgba(200,245,90,.35),0 8px 24px -6px rgba(200,245,90,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:220ms;
  --container:1200px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:Inter,"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;border-radius:var(--radius-img);object-fit:cover}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700}
p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.num{font-variant-numeric:tabular-nums}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
.section{padding:96px 0}
.section--alt{background:var(--surface-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.sec-head h2{font-size:32px;letter-spacing:.4px}
.sec-head p{margin-top:10px;color:var(--text-2);font-size:15px;max-width:640px}
.sec-more{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:14px;font-weight:600;white-space:nowrap;transition:transform var(--t) var(--ease)}
.sec-more:hover{transform:translateX(2px)}

/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:60;background:rgba(5,8,15,.88);backdrop-filter:blur(16px) saturate(140%);border-bottom:1px solid var(--line);transition:background var(--t) var(--ease)}
.site-header.scrolled{background:rgba(8,13,24,.94)}
.header-inner{display:flex;align-items:center;gap:18px;height:72px;transition:height var(--t) var(--ease)}
.site-header.scrolled .header-inner{height:60px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#04101F;font-size:13px;font-weight:800;letter-spacing:.5px;box-shadow:0 6px 18px -8px rgba(47,124,255,.9)}
.logo-text{font-size:17px;font-weight:700;letter-spacing:.6px}
.nav-main{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{position:relative;padding:8px 12px;font-size:14.5px;color:var(--text-2);border-radius:8px;transition:color var(--t) var(--ease)}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;border-radius:2px;background:transparent;transition:background var(--t) var(--ease),box-shadow var(--t) var(--ease)}
.nav-link:hover{color:var(--text-1)}
.nav-link.active{color:var(--text-1);font-weight:600}
.nav-link.active::after{background:var(--brand);box-shadow:0 0 10px rgba(47,124,255,.9)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:8px}
.icon-btn{width:38px;height:38px;border-radius:12px;border:1px solid var(--line);display:grid;place-items:center;color:var(--text-2);transition:color var(--t) var(--ease),border-color var(--t) var(--ease),background var(--t) var(--ease)}
.icon-btn:hover{color:var(--text-1);border-color:var(--line-strong);background:var(--surface-3)}
.menu-btn{display:none;width:38px;height:38px;border-radius:12px;border:1px solid var(--line);place-items:center;color:var(--text-2)}
.search-pop{display:none;border-top:1px solid var(--line);background:rgba(10,16,32,.96);padding:14px 0}
.search-pop.open{display:block}
.search-form{display:flex;gap:10px;max-width:620px}
.search-form input{flex:1;height:46px;padding:0 16px;border-radius:var(--radius-input);border:1px solid var(--line);background:#0C1424;color:var(--text-1);font-size:14.5px;transition:border-color var(--t),box-shadow var(--t)}
.search-form input::placeholder{color:var(--text-3)}
.search-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(47,124,255,.22)}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:rgba(10,16,32,.98)}
.mobile-drawer.open{display:block}
.mobile-drawer a{display:block;padding:14px 20px;font-size:15px;color:var(--text-2);border-bottom:1px solid var(--line);transition:color var(--t),background var(--t)}
.mobile-drawer a:hover{color:var(--text-1);background:var(--surface-3)}
.mobile-drawer a.active{color:var(--brand-2)}

/* ============ buttons ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;transition:transform var(--t) var(--ease),box-shadow var(--t) var(--ease),background var(--t) var(--ease),border-color var(--t) var(--ease),color var(--t) var(--ease)}
.btn-primary{background:var(--accent);color:#0B1400;border-radius:999px;padding:13px 26px;font-size:15px;font-weight:700;box-shadow:var(--shadow-cta)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(200,245,90,.5),0 12px 30px -8px rgba(200,245,90,.6)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{border:1px solid var(--line-strong);background:rgba(18,28,48,.4);color:var(--text-1);border-radius:12px;padding:13px 24px;font-size:15px}
.btn-ghost:hover{border-color:var(--brand);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{padding:0 16px;height:34px;font-size:13.5px;border-radius:999px}
.btn-line{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:14px;font-weight:600;border-bottom:1px solid rgba(47,124,255,.35);padding-bottom:2px;transition:gap var(--t) var(--ease),color var(--t)}
.btn-line:hover{gap:10px;color:var(--brand-2);border-color:rgba(53,224,214,.5)}
.btn[disabled],.btn.disabled{opacity:.4;pointer-events:none}

/* ============ breadcrumb ============ */
.crumb-wrap{padding:22px 0 0;background:var(--bg-900)}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);flex-wrap:wrap}
.breadcrumb a{color:var(--text-2);transition:color var(--t)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:rgba(120,170,255,.35)}
.breadcrumb .cur{color:var(--text-3)}

/* ============ hero ============ */
.hero-cat{position:relative;overflow:hidden;padding:40px 0 56px;background:var(--bg-900);border-bottom:1px solid var(--line)}
.hero-cat__bg{position:absolute;inset:0;background-image:url(/assets/images/backpic/back-2.webp);background-size:cover;background-position:center right;opacity:.2;mask-image:linear-gradient(100deg,rgba(0,0,0,0) 18%,rgba(0,0,0,.85) 78%);-webkit-mask-image:linear-gradient(100deg,rgba(0,0,0,0) 18%,rgba(0,0,0,.85) 78%)}
.hero-cat::before{content:"";position:absolute;top:-220px;left:12%;width:620px;height:420px;background:radial-gradient(circle,rgba(47,124,255,.18),transparent 68%);pointer-events:none}
.hero-cat::after{content:"";position:absolute;right:-80px;bottom:-120px;width:420px;height:320px;background:radial-gradient(circle,rgba(53,224,214,.14),transparent 70%);pointer-events:none}
.hero-inner{position:relative;z-index:2;max-width:820px}
.hero-tag{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:1px;color:var(--brand-2);border:1px solid rgba(53,224,214,.28);background:rgba(53,224,214,.08);border-radius:999px;padding:5px 14px}
.hero-cat h1{margin-top:20px;font-size:44px;letter-spacing:.6px}
.hero-lead{margin-top:16px;color:var(--text-2);font-size:16.5px;max-width:760px}
.hero-cta{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}
.hero-stats{display:flex;gap:0;margin-top:34px;flex-wrap:wrap}
.hero-stat{padding:0 26px;border-left:1px solid var(--line)}
.hero-stat:first-child{padding-left:0;border-left:0}
.hero-stat b{display:block;font-size:24px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;letter-spacing:.5px}
.hero-stat span{display:block;font-size:13px;color:var(--text-3);margin-top:2px}

/* ============ tabs ============ */
.tabs{position:sticky;top:72px;z-index:45;background:rgba(10,16,32,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);transition:top var(--t) var(--ease)}
.site-header.scrolled ~ .tabs{top:60px}
.tabs-inner{display:flex;gap:6px;padding:10px 0;overflow-x:auto;scrollbar-width:none}
.tabs-inner::-webkit-scrollbar{display:none}
.tab{position:relative;white-space:nowrap;padding:8px 14px;border-radius:999px;font-size:13.5px;color:var(--text-2);border:1px solid transparent;transition:color var(--t),border-color var(--t),background var(--t)}
.tab:hover{color:var(--text-1);background:rgba(18,28,48,.6)}
.tab.active{color:var(--text-1);border-color:rgba(120,170,255,.28);background:var(--surface-3)}
.tab.active::after{content:"";position:absolute;left:14px;right:14px;bottom:-1px;height:2px;border-radius:2px;background:var(--accent);box-shadow:0 0 10px rgba(200,245,90,.7)}

/* ============ module grid ============ */
.module-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.module-card{position:relative;display:flex;flex-direction:column;gap:14px;padding:26px;border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface-3);backdrop-filter:blur(18px) saturate(140%);box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);transition:transform var(--t) var(--ease),box-shadow var(--t) var(--ease),border-color var(--t) var(--ease)}
.module-card:hover{transform:translateY(-4px);border-color:rgba(47,124,255,.5);box-shadow:var(--shadow-hover),inset 0 1px 0 rgba(255,255,255,.08)}
.module-card__top{display:flex;align-items:center;gap:14px}
.icon-tile{flex-shrink:0;width:46px;height:46px;border-radius:14px;display:grid;place-items:center;color:var(--brand-2);background:linear-gradient(135deg,rgba(47,124,255,.22),rgba(53,224,214,.14));border:1px solid rgba(120,170,255,.2)}
.module-card h3{font-size:19px;font-weight:600}
.module-card p{color:var(--text-2);font-size:14.5px;line-height:1.8}
.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{font-size:12px;padding:4px 10px;border-radius:999px;color:var(--brand-2);background:rgba(53,224,214,.1);border:1px solid rgba(53,224,214,.18);white-space:nowrap}
.chip--blue{color:#9CC3FF;background:rgba(47,124,255,.12);border-color:rgba(47,124,255,.24)}
.module-card__foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:6px;border-top:1px solid var(--line)}
.module-card__foot .meta{font-size:12.5px;color:var(--text-3)}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);transition:gap var(--t) var(--ease),color var(--t)}
.link-more:hover{gap:10px;color:var(--brand-2)}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:12px;background:var(--surface-3);backdrop-filter:blur(18px);margin-bottom:12px;overflow:hidden;transition:border-color var(--t) var(--ease)}
.faq-item.open{border-color:rgba(47,124,255,.5)}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;padding:18px 20px;font-size:16px;font-weight:600;text-align:left;color:var(--text-1)}
.faq-icon{flex-shrink:0;width:22px;height:22px;display:grid;place-items:center;color:var(--brand);transition:transform 240ms var(--ease)}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--accent)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 240ms var(--ease)}
.faq-item.open .faq-a{max-height:300px}
.faq-a p{padding:0 20px 20px;color:var(--text-2);font-size:15px}

/* ============ related ============ */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface-1);overflow:hidden;box-shadow:var(--shadow-card);transition:transform var(--t) var(--ease),border-color var(--t) var(--ease),box-shadow var(--t) var(--ease)}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(47,124,255,.45);box-shadow:var(--shadow-hover)}
.rel-card__thumb{aspect-ratio:16/9;overflow:hidden;background:#0C1424}
.rel-card__thumb img{width:100%;height:100%;border-radius:0;transition:transform 320ms var(--ease)}
.rel-card:hover .rel-card__thumb img{transform:scale(1.03)}
.rel-card__body{padding:20px;display:flex;flex-direction:column;gap:10px}
.rel-card__body h3{font-size:17px;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-card__body p{font-size:14px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-card__meta{font-size:12.5px;color:var(--text-3);display:flex;gap:10px;align-items:center}

/* ============ CTA ============ */
.cta-card{position:relative;overflow:hidden;display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:center;padding:44px;border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface-3);backdrop-filter:blur(18px) saturate(140%);box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06)}
.cta-card::after{content:"";position:absolute;right:-60px;top:-80px;width:340px;height:300px;background:radial-gradient(circle,rgba(200,245,90,.12),transparent 70%);pointer-events:none}
.cta-card h2{font-size:30px}
.cta-card p{margin-top:14px;color:var(--text-2);font-size:15.5px;max-width:560px}
.cta-actions{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}
.check-list{position:relative;z-index:2;display:grid;gap:14px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--text-2);padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:rgba(10,16,32,.5)}
.check-list svg{flex-shrink:0;margin-top:3px;color:var(--accent)}

/* ============ footer ============ */
.site-footer{position:relative;background:var(--surface-2);border-top:1px solid var(--line);padding-top:64px;margin-top:0}
.site-footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:linear-gradient(90deg,rgba(47,124,255,.7),rgba(47,124,255,0))}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.foot-brand p{margin-top:16px;font-size:14px;color:var(--text-2);max-width:340px}
.socials{display:flex;gap:10px;margin-top:20px}
.socials a{display:grid;place-items:center;width:36px;height:36px;border-radius:12px;border:1px solid var(--line);color:var(--text-2);transition:color var(--t),border-color var(--t),transform var(--t)}
.socials a:hover{color:var(--brand-2);border-color:var(--line-strong);transform:translateY(-2px)}
.foot-col h4{font-size:14px;font-weight:600;letter-spacing:.6px;color:var(--text-1);margin-bottom:16px}
.foot-col ul{display:grid;gap:10px}
.foot-col a,.foot-col span{font-size:14px;color:var(--text-2);transition:color var(--t)}
.foot-col a:hover{color:var(--brand)}
.foot-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 0;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);flex-wrap:wrap}

/* ============ mobile tabbar ============ */
.mobile-tabbar{position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;grid-template-columns:repeat(4,1fr);height:64px;padding-bottom:env(safe-area-inset-bottom);background:rgba(8,13,24,.96);backdrop-filter:blur(18px);border-top:1px solid var(--line)}
.mobile-tabbar a{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:11px;color:var(--text-3);transition:color var(--t)}
.mobile-tabbar a.active{color:var(--brand)}
.mobile-tabbar a.active::after{content:"";position:absolute;bottom:8px;width:4px;height:4px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px rgba(200,245,90,.9)}

/* ============ reveal ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============ responsive ============ */
@media (max-width:1279px){
  .hero-cat h1{font-size:38px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .hero-cat h1{font-size:34px}
  .nav-main{display:none}
  .menu-btn{display:grid}
  .module-grid{grid-template-columns:1fr}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .cta-card{grid-template-columns:1fr;padding:34px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{padding-bottom:80px}
  .section{padding:56px 0}
  .sec-head{flex-direction:column;align-items:flex-start;margin-bottom:26px}
  .sec-head h2{font-size:24px}
  .hero-cat{padding:24px 0 40px}
  .hero-cat h1{font-size:28px}
  .hero-lead{font-size:15.5px}
  .hero-cta{gap:10px}
  .hero-cta .btn{width:100%;height:52px;padding:0 18px}
  .hero-stats{gap:18px;margin-top:26px}
  .hero-stat{padding:0 0 0 16px}
  .tabs{top:60px}
  .tab{padding:7px 12px;font-size:13px}
  .module-card{padding:20px}
  .rel-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:6px}
  .mobile-tabbar{display:grid}
  .cta-card{padding:24px}
  .cta-card h2{font-size:22px}
}
@media (max-width:479px){
  .container{padding:0 16px}
  .hero-cat h1{font-size:26px}
  .module-card{padding:18px;border-radius:16px}
  .hero-stats{flex-direction:column;gap:14px}
  .hero-stat{padding:0;border-left:0;border-top:1px solid var(--line);padding-top:10px}
  .hero-stat:first-child{border-top:0;padding-top:0}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category4 */
/* ============ 设计变量 ============ */
:root{
  --bg-900:#05080F;
  --surface-1:#0A1020;
  --surface-2:#0E1728;
  --surface-3:rgba(18,28,48,.55);
  --brand:#2F7CFF;
  --brand-2:#35E0D6;
  --accent:#C8F55A;
  --text-1:#E8EEF9;
  --text-2:#A8B6CE;
  --text-3:#6E7E96;
  --ok:#35E0D6;
  --warn:#FFB547;
  --err:#FF6B6B;
  --line:rgba(120,170,255,.14);
  --line-soft:rgba(120,170,255,.08);
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --sh-card:0 8px 24px -12px rgba(0,0,0,.6);
  --sh-hover:0 16px 40px -16px rgba(47,124,255,.35);
  --sh-cta:0 0 0 1px rgba(200,245,90,.35),0 8px 24px -6px rgba(200,245,90,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  padding-bottom:0;
}
img{max-width:100%;display:block;border-radius:var(--r-img);object-fit:cover;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
a:visited{color:inherit;}
button{font-family:inherit;border:0;background:none;cursor:pointer;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
input,select,textarea{font-family:inherit;font-size:15px;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.num{font-variant-numeric:tabular-nums;font-weight:700;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}
.section{padding:96px 0;}
.section--alt{background:var(--surface-1);}
@media (max-width:1023px){.section{padding:72px 0;}}
@media (max-width:767px){.section{padding:56px 0;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(5,8,15,.78);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.is-scrolled{background:rgba(5,8,15,.92);box-shadow:0 10px 30px -20px rgba(0,0,0,.9);}
.header-inner{display:flex;align-items:center;gap:20px;height:76px;transition:height .24s var(--ease);}
.site-header.is-scrolled .header-inner{height:62px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:11px;
  border:1px solid rgba(47,124,255,.55);
  background:linear-gradient(140deg,rgba(47,124,255,.28),rgba(53,224,214,.14));
  font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--text-1);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
}
.logo-text{font-size:18px;font-weight:700;letter-spacing:.02em;}
.logo-text em{font-style:normal;color:var(--brand-2);}
.nav-main{display:flex;align-items:center;gap:2px;margin-left:14px;}
.nav-link{
  position:relative;display:inline-block;
  padding:9px 14px;border-radius:10px;
  font-size:15px;color:var(--text-2);
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:var(--brand);box-shadow:0 0 10px rgba(47,124,255,.85);
  opacity:0;transform:scaleX(.4);transition:opacity .18s var(--ease),transform .18s var(--ease);
}
.nav-link:hover{color:var(--text-1);background:rgba(47,124,255,.08);}
.nav-link:hover::after{opacity:.7;transform:scaleX(1);}
.nav-link.active{color:var(--text-1);}
.nav-link.active::after{opacity:1;transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.icon-btn{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--text-2);
  transition:color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.icon-btn:hover{color:var(--brand-2);border-color:rgba(53,224,214,.5);transform:translateY(-1px);}
.nav-burger{display:none;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn-primary{
  height:46px;padding:0 24px;border-radius:999px;
  background:linear-gradient(135deg,#D6FF7A,#C8F55A 55%,#A9E23F);
  color:#08121F;box-shadow:var(--sh-cta);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(200,245,90,.5),0 14px 32px -8px rgba(200,245,90,.55);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  height:46px;padding:0 22px;border-radius:12px;
  border:1px solid var(--line);color:var(--text-1);background:rgba(255,255,255,.02);
}
.btn-ghost:hover{border-color:rgba(47,124,255,.6);color:#fff;transform:translateY(-2px);}
.btn-sm{height:32px;padding:0 14px;font-size:13px;border-radius:10px;}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.4;pointer-events:none;}
.header-actions .btn-primary{height:40px;padding:0 18px;font-size:14px;}

/* 搜索浮层 */
.search-panel{
  display:none;border-top:1px solid var(--line);background:rgba(10,16,32,.96);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
}
.search-panel.open{display:block;}
.search-inner{display:flex;gap:12px;padding:16px 20px;max-width:1200px;margin:0 auto;}
.search-inner input{
  flex:1;height:48px;border-radius:var(--r-input);
  background:#0C1424;border:1px solid var(--line);color:var(--text-1);padding:0 16px;
}
.search-inner input::placeholder{color:var(--text-3);}
.search-inner input:focus{border-color:var(--brand);box-shadow:0 0 0 2px rgba(47,124,255,.35);outline:none;}

/* 移动抽屉 */
.mobile-drawer{display:none;border-top:1px solid var(--line);background:rgba(10,16,32,.98);}
.mobile-drawer.open{display:block;}
.mobile-drawer ul{padding:10px 20px 18px;}
.mobile-drawer a{
  display:block;padding:14px 4px;border-bottom:1px solid var(--line-soft);
  font-size:16px;color:var(--text-2);
}
.mobile-drawer a.active{color:var(--accent);}

/* ============ 分类页大图条 ============ */
.cat-hero{position:relative;overflow:hidden;min-height:360px;display:flex;align-items:flex-end;padding:52px 0 44px;}
.cat-hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;border-radius:0;filter:saturate(1.05);}
.cat-hero-mask{
  position:absolute;inset:0;
  background:
    radial-gradient(720px 340px at 18% 0%,rgba(47,124,255,.20),transparent 70%),
    linear-gradient(180deg,rgba(5,8,15,.42) 0%,rgba(5,8,15,.80) 62%,rgba(5,8,15,.96) 100%);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,170,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(120,170,255,.055) 1px,transparent 1px);
  background-size:64px 64px;
}
.cat-hero-inner{position:relative;z-index:2;width:100%;}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:18px;flex-wrap:wrap;}
.crumbs a{color:var(--text-2);}
.crumbs a:hover{color:var(--brand-2);}
.crumbs .sep{color:var(--text-3);}
.crumbs .now{color:var(--text-3);}
.cat-hero h1{font-size:clamp(28px,4vw,44px);line-height:1.24;font-weight:700;letter-spacing:-.01em;}
.cat-hero-sub{margin-top:14px;max-width:760px;font-size:17px;color:var(--text-2);line-height:1.85;}
.hero-facts{display:flex;flex-wrap:wrap;gap:0;margin-top:28px;}
.fact{padding:0 24px;border-left:1px solid var(--line);}
.fact:first-child{padding-left:0;border-left:0;}
.fact b{display:block;font-size:22px;color:var(--accent);line-height:1.3;font-variant-numeric:tabular-nums;}
.fact span{font-size:13px;color:var(--text-3);}

/* ============ 锚点标签条 ============ */
.anchor-bar{position:sticky;top:62px;z-index:50;background:rgba(10,16,32,.9);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--line);}
.anchor-scroll{display:flex;gap:8px;overflow-x:auto;padding:14px 20px;max-width:1200px;margin:0 auto;scrollbar-width:none;}
.anchor-scroll::-webkit-scrollbar{display:none;}
.anchor-tab{
  flex:0 0 auto;padding:8px 16px;border-radius:999px;font-size:14px;color:var(--text-2);
  border:1px solid transparent;white-space:nowrap;transition:all .18s var(--ease);
}
.anchor-tab:hover{color:var(--text-1);background:rgba(47,124,255,.1);}
.anchor-tab.active{color:var(--accent);border-color:rgba(200,245,90,.35);background:rgba(200,245,90,.08);}

/* ============ 板块标题 ============ */
.sec-head{margin-bottom:36px;max-width:760px;}
.sec-kicker{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.16em;color:var(--brand-2);text-transform:uppercase;margin-bottom:12px;}
.sec-kicker::before{content:"";width:18px;height:1px;background:var(--brand-2);display:inline-block;}
.sec-head h2{font-size:clamp(22px,3vw,32px);line-height:1.35;font-weight:700;}
.sec-head p{margin-top:12px;color:var(--text-2);font-size:16px;line-height:1.85;}

/* ============ 规格化参数列表 ============ */
.spec-group{
  border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--surface-3);backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--sh-card),inset 0 1px 0 rgba(255,255,255,.06);
  overflow:hidden;
}
.spec-row{
  display:grid;grid-template-columns:132px 1fr 168px;gap:28px;align-items:center;
  padding:20px 26px;border-bottom:1px solid var(--line-soft);
  transition:background .18s var(--ease);
}
.spec-row:last-child{border-bottom:0;}
.spec-row:hover{background:var(--surface-2);}
.spec-tag{
  display:inline-flex;align-items:center;justify-content:center;
  height:28px;padding:0 12px;border-radius:8px;font-size:13px;font-weight:600;
  color:var(--brand-2);background:rgba(53,224,214,.1);border:1px solid rgba(53,224,214,.22);
  justify-self:start;white-space:nowrap;
}
.spec-desc{font-size:15px;color:var(--text-2);line-height:1.75;}
.spec-desc strong{color:var(--text-1);font-weight:600;}
.spec-val{text-align:right;font-size:17px;color:var(--accent);font-variant-numeric:tabular-nums;font-weight:700;}
.spec-val small{display:block;font-size:12px;color:var(--text-3);font-weight:400;letter-spacing:.02em;}

/* ============ 保障条 ============ */
.guard-bar{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.guard-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.guard-cell{padding:32px 26px;border-left:1px solid var(--line);}
.guard-cell:first-child{border-left:0;}
.guard-cell svg{color:var(--brand);margin-bottom:14px;}
.guard-cell h3{font-size:17px;font-weight:600;margin-bottom:6px;}
.guard-cell p{font-size:13px;color:var(--text-3);line-height:1.7;}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px;max-width:900px;}
.faq-item{
  border:1px solid var(--line);border-radius:12px;background:var(--surface-3);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.faq-item:hover{border-color:rgba(47,124,255,.45);}
.faq-item.open{border-color:rgba(47,124,255,.65);background:rgba(18,28,48,.7);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;font-size:16px;font-weight:600;text-align:left;color:var(--text-1);
}
.faq-icon{
  flex:0 0 auto;width:22px;height:22px;position:relative;
  transition:transform .24s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  background:var(--brand-2);border-radius:2px;
}
.faq-icon::before{width:14px;height:2px;}
.faq-icon::after{width:2px;height:14px;}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-a{
  max-height:0;overflow:hidden;opacity:0;
  transition:max-height .3s var(--ease),opacity .24s var(--ease);
}
.faq-item.open .faq-a{max-height:340px;opacity:1;}
.faq-a p{padding:0 20px 20px;font-size:15px;color:var(--text-2);line-height:1.85;}

/* ============ CTA ============ */
.cta-card{
  position:relative;overflow:hidden;
  border:1px solid rgba(120,170,255,.2);border-radius:var(--r-card);
  background:linear-gradient(120deg,rgba(15,25,45,.92),rgba(10,16,32,.9));
  padding:44px;
  display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center;
  box-shadow:var(--sh-card),inset 0 1px 0 rgba(255,255,255,.06);
}
.cta-card::before{
  content:"";position:absolute;right:-80px;top:-120px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(53,224,214,.22),transparent 65%);
}
.cta-card h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;position:relative;}
.cta-card p{margin-top:14px;color:var(--text-2);font-size:16px;max-width:560px;position:relative;}
.cta-actions{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap;position:relative;}
.cta-points{position:relative;display:grid;gap:14px;}
.cta-points li{display:flex;gap:10px;font-size:15px;color:var(--text-2);}
.cta-points li::before{content:"";flex:0 0 auto;width:8px;height:8px;margin-top:9px;border-radius:2px;background:var(--accent);box-shadow:0 0 10px rgba(200,245,90,.55);}

/* ============ 继续了解链接 ============ */
.link-track{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.link-item{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:20px 22px;border:1px solid var(--line);border-radius:14px;
  background:var(--surface-3);font-size:15px;color:var(--text-2);
  transition:all .2s var(--ease);
}
.link-item:hover{border-color:rgba(47,124,255,.55);color:var(--text-1);transform:translateY(-2px);box-shadow:var(--sh-hover);}
.link-item svg{color:var(--brand-2);flex:0 0 auto;transition:transform .2s var(--ease);}
.link-item:hover svg{transform:translateX(4px);}

/* ============ 页脚 ============ */
.site-footer{background:var(--surface-2);border-top:1px solid var(--line);position:relative;margin-top:0;}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(47,124,255,.85),rgba(47,124,255,0));
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;padding:64px 0 44px;}
.foot-brand p{margin-top:16px;font-size:14px;color:var(--text-3);line-height:1.85;max-width:320px;}
.socials{display:flex;gap:10px;margin-top:20px;}
.socials a{
  width:34px;height:34px;border-radius:10px;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--text-2);
}
.socials a:hover{color:var(--brand-2);border-color:rgba(53,224,214,.5);}
.foot-col h4{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:16px;letter-spacing:.04em;}
.foot-col li{margin-bottom:11px;}
.foot-col a,.foot-col span{font-size:14px;color:var(--text-3);}
.foot-col a:hover{color:var(--brand-2);}
.foot-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 26px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}

/* ============ 移动底部 Tab ============ */
.mobile-tabs{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:90;
  background:rgba(10,16,32,.96);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tabs ul{display:flex;}
.mobile-tabs li{flex:1;}
.mobile-tabs a{
  position:relative;height:64px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  font-size:11px;color:var(--text-3);
}
.mobile-tabs a svg{color:var(--text-3);}
.mobile-tabs a.active{color:var(--accent);}
.mobile-tabs a.active svg{color:var(--accent);}
.mobile-tabs a.active::after{
  content:"";position:absolute;top:8px;width:4px;height:4px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 8px rgba(200,245,90,.9);
}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .55s var(--ease),transform .55s var(--ease);}
.reveal.in{opacity:1;transform:none;}
.img-box{background:#0C1424;border-radius:var(--r-img);overflow:hidden;position:relative;}
.img-box.no-img::after{
  content:"图片加载中";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-size:13px;color:var(--text-3);
}

@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .foot-grid{grid-template-columns:1.5fr 1fr 1fr;gap:32px;}
  .foot-col:last-child{grid-column:span 3;}
}
@media (max-width:1023px){
  .nav-main{display:none;}
  .nav-burger{display:inline-flex;}
  .anchor-bar{top:62px;}
  .spec-row{grid-template-columns:120px 1fr 140px;gap:20px;padding:18px 20px;}
  .guard-grid{grid-template-columns:1fr 1fr;}
  .guard-cell{border-left:0;border-top:1px solid var(--line);}
  .guard-cell:nth-child(1),.guard-cell:nth-child(2){border-top:0;}
  .guard-cell:nth-child(odd){border-right:1px solid var(--line);}
  .cta-card{grid-template-columns:1fr;gap:28px;padding:34px;}
  .link-track{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  body{padding-bottom:80px;}
  .header-inner{height:62px;}
  .site-header.is-scrolled .header-inner{height:58px;}
  .header-actions .btn-primary{display:none;}
  .mobile-tabs{display:block;}
  .cat-hero{min-height:300px;padding:36px 0 32px;}
  .cat-hero-sub{font-size:16px;}
  .fact{padding:0 16px;}
  .fact b{font-size:19px;}
  .spec-row{grid-template-columns:1fr;gap:10px;padding:18px;}
  .spec-val{text-align:left;font-size:16px;}
  .spec-val small{display:inline;margin-left:8px;}
  .guard-grid{grid-template-columns:1fr;}
  .guard-cell{border-right:0;}
  .link-track{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr;gap:28px;padding:44px 0 30px;}
  .foot-col:last-child{grid-column:auto;}
  .cta-actions .btn{flex:1 1 100%;}
  .btn-primary,.btn-ghost{height:52px;}
  .cta-card{padding:26px 20px;}
}
@media (max-width:479px){
  .sec-head h2{font-size:21px;}
  .faq-q{font-size:15px;padding:16px;}
  .faq-a p{padding:0 16px 16px;}
}

/* roulang page: category3 */
:root{
  --bg-900:#05080F;
  --surface-1:#0A1020;
  --surface-2:#0E1728;
  --surface-3:rgba(18,28,48,.55);
  --brand:#2F7CFF;
  --brand-2:#35E0D6;
  --accent:#C8F55A;
  --text-1:#E8EEF9;
  --text-2:#A8B6CE;
  --text-3:#6E7E96;
  --line:rgba(120,170,255,.14);
  --line-strong:rgba(120,170,255,.32);
  --ok:#35E0D6;
  --warn:#FFB547;
  --err:#FF6B6B;
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --shadow-card:0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-hover:0 16px 40px -16px rgba(47,124,255,.35);
  --shadow-cta:0 0 0 1px rgba(200,245,90,.35),0 8px 24px -6px rgba(200,245,90,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
body::selection{background:rgba(200,245,90,.3)}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700}
p{margin:0}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,8,15,.74);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background .22s var(--ease),box-shadow .22s var(--ease);
}
.site-header.is-scrolled{background:rgba(5,8,15,.92);box-shadow:0 12px 34px -22px rgba(0,0,0,.95)}
.header-inner{display:flex;align-items:center;gap:20px;height:76px;transition:height .22s var(--ease)}
.site-header.is-scrolled .header-inner{height:62px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  font-size:13px;font-weight:700;letter-spacing:.6px;color:#04121F;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 6px 18px -8px rgba(47,124,255,.8);
}
.logo-text{font-size:17px;font-weight:700;letter-spacing:.4px}
.nav-main{display:flex;align-items:center;gap:2px;margin:0 auto}
.nav-link{
  position:relative;padding:9px 13px;border-radius:10px;
  font-size:14.5px;color:var(--text-2);
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  opacity:0;transform:scaleX(.35);transition:opacity .18s var(--ease),transform .18s var(--ease);
}
.nav-link:hover{color:var(--text-1);background:rgba(47,124,255,.09)}
.nav-link:hover::after{opacity:.65;transform:scaleX(1)}
.nav-link.active{color:var(--text-1)}
.nav-link.active::after{opacity:1;transform:scaleX(1);box-shadow:0 0 12px rgba(47,124,255,.75)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn,.menu-btn{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--text-2);background:rgba(255,255,255,.02);
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease),transform .18s var(--ease);
}
.icon-btn:hover,.menu-btn:hover{color:var(--text-1);border-color:var(--line-strong);background:rgba(47,124,255,.1);transform:translateY(-1px)}
.menu-btn{display:none}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:rgba(8,13,24,.98);
  padding:10px 20px 18px;
}
.mobile-drawer.is-open{display:block}
.mobile-drawer a{
  display:block;padding:12px 4px;font-size:15px;color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.mobile-drawer a:last-child{border-bottom:0}
.mobile-drawer a.active{color:var(--accent)}
.mobile-drawer a:hover{color:var(--text-1)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:999px;
  font-size:14.5px;font-weight:600;white-space:nowrap;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary{background:var(--accent);color:#111A06;box-shadow:var(--shadow-cta)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(200,245,90,.5),0 14px 32px -8px rgba(200,245,90,.55)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  border:1px solid var(--line);border-radius:12px;color:var(--text-1);
  background:rgba(255,255,255,.02);
}
.btn-ghost:hover{border-color:rgba(47,124,255,.6);background:rgba(47,124,255,.1);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:36px;padding:0 15px;font-size:13.5px;border-radius:10px}
.btn-block{width:100%}
.btn[disabled],.btn.is-loading{opacity:.45;pointer-events:none}

/* ============ 标签 / 徽章 ============ */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 11px;border-radius:999px;font-size:12px;
  color:var(--brand-2);background:rgba(53,224,214,.1);
  border:1px solid rgba(53,224,214,.22);
}
.tag-lime{color:var(--accent);background:rgba(200,245,90,.1);border-color:rgba(200,245,90,.28)}
.tag-blue{color:#9CC4FF;background:rgba(47,124,255,.12);border-color:rgba(47,124,255,.28)}

/* ============ 面包屑 ============ */
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);flex-wrap:wrap}
.breadcrumb a{color:var(--text-2);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--brand-2)}
.breadcrumb .sep{color:var(--line-strong)}
.breadcrumb .cur{color:var(--text-3)}

/* ============ 页面 Hero（矮版） ============ */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:var(--bg-900)}
.page-hero .hero-bg{
  position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;opacity:.28;
}
.page-hero .hero-veil{
  position:absolute;inset:0;
  background:
    radial-gradient(680px 320px at 16% 0%,rgba(47,124,255,.3),transparent 68%),
    radial-gradient(520px 260px at 92% 92%,rgba(53,224,214,.16),transparent 70%),
    linear-gradient(180deg,rgba(5,8,15,.55) 0%,rgba(5,8,15,.9) 62%,var(--bg-900) 100%);
}
.page-hero .container{position:relative;z-index:2;padding-top:46px;padding-bottom:44px}
.page-hero h1{font-size:44px;font-weight:700;margin:14px 0 12px;letter-spacing:-.4px}
.page-hero .hero-sub{color:var(--text-2);font-size:17px;max-width:760px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-stat-row{display:flex;flex-wrap:wrap;gap:26px;margin-top:26px;padding-top:22px;border-top:1px solid var(--line)}
.hero-stat{display:flex;flex-direction:column;gap:2px}
.hero-stat b{font-size:24px;font-weight:700;color:var(--accent);line-height:1.2}
.hero-stat span{font-size:13px;color:var(--text-3)}

/* ============ 锚点条 ============ */
.anchor-bar{
  position:sticky;top:76px;z-index:45;
  background:rgba(10,16,32,.92);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.anchor-inner{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;padding:10px 0}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-link{
  position:relative;padding:8px 14px;border-radius:999px;font-size:14px;white-space:nowrap;
  color:var(--text-2);border:1px solid transparent;
  transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease);
}
.anchor-link:hover{color:var(--text-1);background:rgba(47,124,255,.1)}
.anchor-link.is-active{color:var(--accent);border-color:rgba(200,245,90,.3);background:rgba(200,245,90,.07)}
.anchor-link.is-active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:2px;height:2px;border-radius:2px;
  background:var(--accent);box-shadow:0 0 10px rgba(200,245,90,.8);
}

/* ============ 通用板块 ============ */
.section{padding:88px 0}
.section-alt{background:var(--surface-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:38px}
.section-head h2{font-size:32px;letter-spacing:-.3px}
.section-head .section-sub{margin-top:12px;color:var(--text-2);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.14em;
  color:var(--brand-2);text-transform:uppercase;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--brand),transparent)}

/* ============ 时间线（左右交替） ============ */
.timeline{position:relative;padding:6px 0}
.timeline::before{
  content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;transform:translateX(-50%);
  background:linear-gradient(180deg,rgba(47,124,255,0),rgba(47,124,255,.75) 10%,rgba(53,224,214,.6) 88%,rgba(47,124,255,0));
}
.tl-item{position:relative;width:50%;padding:0 54px 36px 0}
.tl-item:nth-child(even){margin-left:50%;padding:0 0 36px 54px}
.tl-node{
  position:absolute;top:28px;right:-7px;width:14px;height:14px;border-radius:50%;
  background:var(--bg-900);border:2px solid var(--brand);
  box-shadow:0 0 0 5px rgba(47,124,255,.1),0 0 16px rgba(47,124,255,.7);
}
.tl-item:nth-child(even) .tl-node{right:auto;left:-7px;border-color:var(--brand-2);box-shadow:0 0 0 5px rgba(53,224,214,.1),0 0 16px rgba(53,224,214,.6)}
.tl-card{
  border:1px solid var(--line);border-radius:var(--r-card);padding:24px 26px;
  background:var(--surface-3);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.tl-card:hover{transform:translateY(-3px);border-color:rgba(47,124,255,.5);box-shadow:var(--shadow-hover),inset 0 1px 0 rgba(255,255,255,.08)}
.tl-index{font-size:12.5px;font-weight:700;letter-spacing:.16em;color:var(--brand-2)}
.tl-card h3{font-size:20px;margin:10px 0 10px}
.tl-card > p{color:var(--text-2);font-size:15px}
.tl-stats{display:flex;flex-wrap:wrap;gap:18px;margin-top:16px;padding-top:14px;border-top:1px solid var(--line)}
.tl-stat{font-size:12.5px;color:var(--text-3)}
.tl-stat b{margin-right:5px;font-size:15px;font-weight:700;color:var(--accent)}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px;max-width:880px}
.faq-item{
  border:1px solid var(--line);border-radius:12px;background:var(--surface-3);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item.is-open{border-color:rgba(47,124,255,.5);box-shadow:0 12px 30px -20px rgba(47,124,255,.6)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 20px;font-size:16px;font-weight:600;text-align:left;
}
.faq-q:hover{color:var(--brand-2)}
.faq-icon{
  flex:0 0 24px;width:24px;height:24px;border-radius:50%;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--brand);font-size:15px;line-height:1;
  transition:transform .24s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:rgba(200,245,90,.14);color:var(--accent);border-color:rgba(200,245,90,.35)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a-inner{padding:0 20px 20px;color:var(--text-2);font-size:15px}

/* ============ 相关入口卡 ============ */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{
  display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;background:var(--surface-1);
  box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(47,124,255,.5);box-shadow:var(--shadow-hover)}
.rel-thumb{aspect-ratio:16/9;background:#0C1424;overflow:hidden}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--ease)}
.rel-card:hover .rel-thumb img{transform:scale(1.03)}
.rel-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.rel-body h3{font-size:18px;margin-bottom:8px}
.rel-body p{color:var(--text-2);font-size:14px}
.rel-more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;color:var(--brand);font-size:13.5px}
.rel-card:hover .rel-more{gap:10px;color:var(--brand-2)}

/* ============ CTA ============ */
.cta-card{
  position:relative;overflow:hidden;
  display:grid;grid-template-columns:1.02fr .98fr;gap:38px;
  padding:38px;border-radius:22px;border:1px solid var(--line);
  background:var(--surface-3);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
}
.cta-card::before{
  content:"";position:absolute;width:420px;height:420px;right:-140px;top:-180px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,124,255,.28),transparent 65%);pointer-events:none;
}
.cta-card > *{position:relative;z-index:1}
.cta-card h2{font-size:30px;letter-spacing:-.3px}
.cta-card .cta-desc{color:var(--text-2);font-size:15.5px;margin-top:14px}
.cta-points{display:grid;gap:12px;margin-top:22px}
.cta-points li{display:flex;gap:10px;font-size:14.5px;color:var(--text-2)}
.cta-points li::before{
  content:"";flex:0 0 8px;width:8px;height:8px;margin-top:9px;border-radius:2px;
  background:var(--accent);box-shadow:0 0 10px rgba(200,245,90,.6);
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:13px;color:var(--text-2)}
.field input,.field select,.field textarea{
  height:48px;border-radius:var(--r-input);border:1px solid var(--line);
  background:#0C1424;color:var(--text-1);padding:0 14px;font-size:14.5px;font-family:inherit;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease);
}
.field textarea{height:auto;min-height:92px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(47,124,255,.22);background:#0E1728;
}
.field.full{grid-column:1 / -1}
.form-note{font-size:12.5px;color:var(--text-3);margin-top:12px}
.form-msg{display:none;margin-top:12px;font-size:14px}
.form-msg.ok{display:block;color:var(--ok)}
.form-msg.err{display:block;color:var(--err)}
.form-actions{margin-top:18px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{position:relative;background:var(--surface-2);border-top:1px solid var(--line)}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(47,124,255,.85),rgba(53,224,214,.35),transparent 78%);
}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.25fr;gap:34px;padding:58px 0 34px}
.foot-brand p{color:var(--text-2);font-size:14px;margin-top:16px;max-width:340px}
.foot-col h4{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:16px}
.foot-col ul{display:grid;gap:10px}
.foot-col a,.foot-col span{color:var(--text-2);font-size:14px;transition:color .18s var(--ease)}
.foot-col a:hover{color:var(--brand-2)}
.socials{display:flex;gap:10px;margin-top:20px}
.socials a{
  width:34px;height:34px;border-radius:10px;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--text-2);
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease),transform .18s var(--ease);
}
.socials a:hover{color:var(--brand-2);border-color:rgba(53,224,214,.45);background:rgba(53,224,214,.08);transform:translateY(-2px)}
.foot-bottom{
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding:18px 0 30px;font-size:13px;color:var(--text-3);
}

/* ============ 移动端底部 Tab ============ */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;
  background:rgba(8,13,24,.95);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar-inner{display:grid;grid-template-columns:repeat(4,1fr);height:64px}
.tab-item{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:11px;color:var(--text-3);transition:color .18s var(--ease);
}
.tab-item svg{width:22px;height:22px}
.tab-item.is-active{color:var(--brand)}
.tab-item.is-active::after{
  content:"";position:absolute;top:8px;width:4px;height:4px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 8px var(--accent);
}
.tab-item:hover{color:var(--text-1)}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
img.img-fallback{background:linear-gradient(135deg,#0C1424,#131F36);color:transparent}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .page-hero h1{font-size:38px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .page-hero h1{font-size:34px}
  .section-head h2{font-size:26px}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .cta-card{grid-template-columns:1fr;padding:30px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:900px){
  .nav-main{display:none}
  .menu-btn{display:grid}
  .anchor-bar{top:62px}
}
@media (max-width:767px){
  body{font-size:16px;padding-bottom:64px}
  .tabbar{display:block}
  .header-inner{height:62px;gap:12px}
  .icon-btn{display:none}
  .page-hero .container{padding-top:34px;padding-bottom:34px}
  .page-hero h1{font-size:28px}
  .page-hero .hero-sub{font-size:15.5px}
  .hero-stat b{font-size:20px}
  .section{padding:56px 0}
  .section-head h2{font-size:22px}
  .section-head .section-sub{font-size:15px}
  .timeline::before{left:14px;transform:none}
  .tl-item,.tl-item:nth-child(even){width:100%;margin-left:0;padding:0 0 26px 40px}
  .tl-node,.tl-item:nth-child(even) .tl-node{left:8px;right:auto}
  .tl-card{padding:20px}
  .tl-card h3{font-size:18px}
  .rel-grid{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .btn-block-mobile{width:100%;height:52px}
  .foot-grid{grid-template-columns:1fr;gap:26px;padding:44px 0 26px}
  .foot-bottom{flex-direction:column;gap:8px}
  .cta-card h2{font-size:23px}
  .cta-card{padding:24px}
}
@media (max-width:479px){
  .container{padding:0 16px}
  .page-hero h1{font-size:26px}
  .tl-card{padding:16px}
  .tl-stats{gap:10px}
  .cta-card{padding:18px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
}