/* roulang page: index */
:root{
  --bg-deep:#070F1E;
  --bg-dark:#0B1F3A;
  --bg-navy:#0E2A4D;
  --brand:#2B7FFF;
  --brand-light:#4D9FFF;
  --cyan:#2DE2E6;
  --gold:#D9C27E;
  --white:#F7FAFF;
  --text:#B0C4E0;
  --text-2:#7895B8;
  --text-3:#5D7A9E;
  --line:rgba(255,255,255,.14);
  --card:rgba(255,255,255,.06);
  --card-2:rgba(255,255,255,.085);
  --radius:16px;
  --radius-sm:10px;
  --shadow-cta:0 8px 24px rgba(43,127,255,.35);
  --shadow-cta-h:0 10px 36px rgba(43,127,255,.55);
  --shadow-card:0 12px 30px rgba(0,0,0,.42);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--text);
  line-height:1.7;
  background:
    radial-gradient(circle at 12% -8%, rgba(43,127,255,.14), transparent 38%),
    radial-gradient(circle at 88% 16%, rgba(45,226,230,.07), transparent 32%),
    linear-gradient(150deg, #050B16 0%, #0B1F3A 48%, #081426 100%);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  background-image:linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size:72px 72px;
  pointer-events:none;
}
img{max-width:100%;display:block}
a{color:var(--white);text-decoration:none}
ul,ol{list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--cyan);outline-offset:2px;border-radius:4px}
.container{max-width:1280px;margin:0 auto;padding:0 24px}
.container-wide{max-width:1320px;margin:0 auto;padding:0 24px}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:46px;
  padding:0 26px;
  border-radius:var(--radius-sm);
  font-size:16px;
  font-weight:600;
  border:1px solid transparent;
  transition:all .25s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),#3D7FFF);
  color:#fff;
  box-shadow:var(--shadow-cta);
}
.btn-primary:hover{
  background:linear-gradient(135deg,#3d8bff,var(--brand-light));
  box-shadow:var(--shadow-cta-h);
  transform:translateY(-1px);
  color:#fff;
}
.btn-ghost{
  background:rgba(255,255,255,.06);
  border-color:rgba(255,255,255,.25);
  color:var(--white);
  backdrop-filter:blur(8px);
}
.btn-ghost:hover{
  border-color:rgba(255,255,255,.45);
  background:rgba(255,255,255,.1);
  color:var(--white);
}
.btn-lg{min-height:54px;padding:0 34px;font-size:17px}
.btn-block{width:100%}

/* 区块通用 */
.section{padding:84px 0;position:relative;scroll-margin-top:125px}
.section-head{max-width:760px;margin:0 auto 52px;text-align:center}
.section-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 16px;
  border:1px solid rgba(45,226,230,.3);
  border-radius:999px;
  color:var(--cyan);
  font-size:13px;
  letter-spacing:.04em;
  background:rgba(45,226,230,.07);
  margin-bottom:18px;
}
.section-title{
  font-size:clamp(26px,3.2vw,34px);
  color:var(--white);
  font-weight:700;
  letter-spacing:-.5px;
  line-height:1.3;
}
.section-desc{
  margin-top:16px;
  font-size:16px;
  color:var(--text);
}
.muted{color:var(--text-2)}

/* header */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(7,17,32,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.topbar{
  display:flex;
  align-items:center;
  gap:26px;
  padding:14px 0 10px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:38px;height:38px;
  border-radius:11px;
  background:linear-gradient(135deg,var(--brand),var(--cyan));
  display:flex;
  align-items:center;
  justify-content:center;
  color:#07142b;
  font-weight:800;
  font-size:18px;
  box-shadow:0 0 18px rgba(43,127,255,.55);
}
.brand-text{
  font-size:22px;
  font-weight:800;
  color:var(--white);
  letter-spacing:-.4px;
  line-height:1.3;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.brand-text small{
  font-size:11px;
  font-weight:500;
  color:var(--text-2);
  letter-spacing:.08em;
}
.nav-search{
  flex:1;
  display:flex;
  align-items:center;
  max-width:560px;
  margin:0 auto;
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.14);
  border-radius:999px;
  height:42px;
  padding:0 8px 0 16px;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.nav-search:focus-within{
  border-color:var(--cyan);
  box-shadow:0 0 0 3px rgba(45,226,230,.15);
}
.nav-search svg{flex-shrink:0;margin-right:10px;opacity:.8}
.nav-search input{
  flex:1;
  min-width:0;
  background:transparent;
  border:0;
  outline:none;
  color:var(--white);
  font-size:14px;
  height:100%;
}
.nav-search input::placeholder{color:#7190B5}
.nav-search button{
  background:var(--brand);
  border:0;
  color:#fff;
  padding:0 18px;
  border-radius:999px;
  height:32px;
  font-size:14px;
  transition:background .25s ease;
}
.nav-search button:hover{background:var(--brand-light)}
.site-nav{
  display:flex;
  align-items:center;
  gap:4px;
  padding-bottom:12px;
  flex-wrap:wrap;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:4px;
  flex-wrap:wrap;
}
.nav-list a{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 14px;
  font-size:15px;
  color:var(--white);
  border-radius:999px;
  font-weight:500;
  transition:all .2s ease;
}
.nav-list a::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:4px;
  width:0;
  height:2px;
  transform:translateX(-50%);
  background:linear-gradient(90deg,var(--brand),var(--cyan));
  border-radius:2px;
  transition:all .25s ease;
}
.nav-list a:hover{color:#fff;background:rgba(255,255,255,.06)}
.nav-list a[aria-current="page"]{
  color:#fff;
  background:rgba(43,127,255,.14);
}
.nav-list a[aria-current="page"]::after{width:22px}
.hot-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-left:10px;
  font-size:12px;
  color:var(--gold);
}
.hot-tag i{
  width:5px;height:5px;
  border-radius:50%;
  background:var(--gold);
}
.header-cta .btn{min-height:40px;padding:0 18px;font-size:14px}
.menu-toggle{
  display:none;
  width:42px;
  height:42px;
  border-radius:10px;
  background:rgba(255,255,255,.07);
  border:1px solid var(--line);
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
}
.menu-toggle span{
  width:20px;
  height:2px;
  background:var(--white);
  border-radius:2px;
  transition:all .25s;
}
body.nav-open .menu-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.nav-open .menu-toggle span:nth-child(2){opacity:0}
body.nav-open .menu-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* hero */
.hero{
  position:relative;
  display:flex;
  align-items:center;
  padding:74px 0 74px;
  background:
    linear-gradient(90deg, rgba(5,13,26,.85) 20%, rgba(5,13,26,.45) 100%),
    url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  border-bottom:1px solid rgba(255,255,255,.05);
  overflow:hidden;
}
.hero .container{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:58px;
  align-items:center;
}
.hero-copy{max-width:620px}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  border:1px solid rgba(217,194,126,.45);
  background:rgba(217,194,126,.08);
  color:var(--gold);
  padding:5px 14px;
  border-radius:999px;
  font-size:13px;
  margin-bottom:22px;
}
.hero h1{
  font-size:clamp(32px,4vw,50px);
  font-weight:800;
  line-height:1.18;
  color:var(--white);
  letter-spacing:-.8px;
  margin-bottom:22px;
}
.hero h1 .hero-highlight{
  background:linear-gradient(90deg,var(--cyan),var(--brand-light));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-sub{
  font-size:16px;
  color:#B6CBE4;
  line-height:1.85;
  margin-bottom:28px;
  max-width:520px;
}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap}
.hero-card{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.data-tile{
  position:relative;
  border-radius:18px;
  padding:18px 18px 16px;
  border:1px solid rgba(255,255,255,.15);
  background:linear-gradient(145deg,rgba(255,255,255,.1),rgba(255,255,255,.04));
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  box-shadow:0 14px 30px rgba(0,0,0,.18);
  overflow:hidden;
}
.data-tile::before{
  content:"";
  position:absolute;
  right:0;top:0;
  width:70px;height:70px;
  background:radial-gradient(circle at top right,rgba(45,226,230,.15),transparent 70%);
}
.data-tile strong{
  display:block;
  font-size:22px;
  font-weight:800;
  color:#fff;
  letter-spacing:-.3px;
  line-height:1.3;
}
.data-tile strong small{font-size:14px;color:var(--cyan);margin-left:2px}
.data-tile span{
  display:block;
  margin-top:4px;
  font-size:13px;
  color:var(--text-2);
}

/* 优惠阶梯 */
.price-section{background:linear-gradient(180deg,rgba(11,31,58,0) 0%,rgba(11,31,58,.4) 50%,rgba(11,31,58,0) 100%)}
.price-grid{
  display:grid;
  grid-template-columns:.88fr 1.12fr .88fr;
  gap:22px;
  align-items:stretch;
}
.price-card{
  position:relative;
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:20px;
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  padding:34px 28px 28px;
  transition:all .3s ease;
  overflow:hidden;
}
.price-card::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:radial-gradient(circle at 50% 0%,rgba(255,255,255,.06),transparent 40%);
}
.price-card:hover{
  background:rgba(255,255,255,.09);
  border-color:rgba(255,255,255,.25);
  box-shadow:var(--shadow-card);
  transform:translateY(-4px);
}
.price-card.hot{
  background:linear-gradient(180deg,rgba(43,127,255,.16),rgba(255,255,255,.05));
  border-color:rgba(43,127,255,.55);
  box-shadow:0 14px 44px rgba(21,60,177,.25);
}
.price-flag{
  position:absolute;
  top:-12px;
  left:50%;
  transform:translateX(-50%);
  background:linear-gradient(90deg,var(--brand),var(--cyan));
  color:#fff;
  font-size:12px;
  font-weight:600;
  padding:3px 16px;
  border-radius:999px;
  box-shadow:0 6px 18px rgba(43,127,255,.4);
  white-space:nowrap;
}
.price-top{margin-bottom:18px;flex-shrink:0}
.price-top h3{
  font-size:21px;
  color:#fff;
  font-weight:700;
  margin-bottom:5px;
}
.price-top p{font-size:13px;color:var(--text-2)}
.price-amount{
  display:flex;
  align-items:baseline;
  gap:6px;
  margin-bottom:22px;
  flex-shrink:0;
}
.price-amount .cur{font-size:16px;color:var(--gold);font-weight:600}
.price-amount .num{
  font-size:42px;
  font-weight:800;
  color:#fff;
  letter-spacing:-1px;
}
.price-amount .unit{font-size:14px;color:var(--text-2)}
.price-list{flex:1;display:flex;flex-direction:column;gap:10px;margin-bottom:26px}
.price-list li{
  position:relative;
  padding-left:22px;
  font-size:15px;
  line-height:1.55;
  color:#D0E0F2;
}
.price-list li::before{
  content:"✓";
  position:absolute;
  left:0;
  color:var(--cyan);
  font-weight:700;
}
.price-card .btn{width:100%}

/* 套餐对比 */
.compare-grid{
  display:grid;
  grid-template-columns:.92fr 1.38fr;
  gap:46px;
  align-items:center;
}
.compare-copy h2{margin-bottom:18px}
.compare-copy .section-desc{margin-bottom:20px}
.feature-check-list li{
  display:flex;
  gap:10px;
  font-size:15px;
  color:#C6D8EF;
  margin-bottom:10px;
  align-items:flex-start;
}
.feature-check-list li svg{
  flex-shrink:0;
  margin-top:5px;
}
.table-wrap{
  position:relative;
  border-radius:18px;
  background:linear-gradient(145deg,rgba(255,255,255,.1),rgba(255,255,255,.04));
  border:1px solid var(--line);
  backdrop-filter:blur(18px);
  overflow:auto;
}
.compare-table{width:100%;border-collapse:collapse;min-width:560px}
.compare-table th,
.compare-table td{
  padding:11px 16px;
  text-align:left;
  border-bottom:1px solid rgba(255,255,255,.08);
  vertical-align:middle;
  font-size:14px;
}
.compare-table th{
  min-height:48px;
  color:var(--white);
  font-weight:600;
  background:rgba(255,255,255,.04);
  white-space:nowrap;
}
.compare-table td:first-child{
  color:var(--text-2);
  white-space:nowrap;
  font-size:14px;
}
.compare-table td:not(:first-child){
  color:#DDECFF;
}
.compare-table tbody tr:hover td{
  background:rgba(255,255,255,.025);
}
.compare-table th:nth-child(3){
  color:var(--brand-light);
}
.table-tip{
  padding:12px 14px;
  display:flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  color:var(--text-2);
}

/* 限时入口 */
.promo-block{
  background:
    linear-gradient(90deg, rgba(5,13,26,.82) 20%, rgba(43,127,255,.25) 100%),
    url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  border-block:1px solid rgba(255,255,255,.07);
}
.promo-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  flex-wrap:wrap;
}
.promo-copy{flex:1;min-width:280px}
.promo-copy h2{
  color:#fff;
  font-size:clamp(24px,3vw,32px);
  font-weight:700;
  letter-spacing:-.5px;
  margin-bottom:8px;
}
.promo-copy p{color:#bed3ed;max-width:540px;margin-top:10px}
.countdown{
  display:flex;
  align-items:center;
  gap:12px;
  flex-shrink:0;
}
.count-block{
  min-width:68px;
  display:flex;
  flex-direction:column;
  align-items:center;
  padding:12px 8px;
  background:rgba(255,255,255,.1);
  backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,.2);
  border-radius:14px;
  box-shadow:inset 0 1px rgba(255,255,255,.2);
}
.count-block b{
  font-size:26px;
  font-weight:800;
  color:#fff;
  font-variant-numeric:tabular-nums;
}
.count-block span{
  font-size:12px;
  color:var(--text-2);
  margin-top:2px;
}
.count-sep{font-size:24px;font-weight:800;color:var(--cyan);padding-bottom:16px}
.promo-btn-wrap{flex-shrink:0;display:flex;flex-direction:column;gap:8px;align-items:center}

/* 动态资讯 */
.news-intro{
  margin-bottom:44px;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
}
.news-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px;
}
.news-card{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--card);
  backdrop-filter:blur(12px);
  transition:all .3s ease;
}
.news-card:hover{
  border-color:rgba(255,255,255,.28);
  background:rgba(255,255,255,.09);
  box-shadow:var(--shadow-card);
  transform:translateY(-3px);
}
.news-card-inner{
  display:flex;
  min-height:190px;
}
.news-thumb{
  flex:0 0 215px;
  overflow:hidden;
  border-right:1px solid rgba(255,255,255,.08);
}
.news-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-body{
  flex:1;
  display:flex;
  flex-direction:column;
  padding:20px 18px 16px;
  min-width:0;
}
.news-body h3{
  font-size:17px;
  font-weight:700;
  color:var(--white);
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:8px;
  letter-spacing:-.2px;
}
.news-excerpt{
  color:var(--text-2);
  font-size:14px;
  line-height:1.7;
  margin-bottom:14px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-meta{
  margin-top:auto;
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-2);
}
.news-cat{
  padding:3px 12px;
  background:rgba(217,194,126,.08);
  color:#E2C991;
  border-radius:999px;
  font-size:12px;
  display:inline-block;
}
.news-meta time{margin-left:auto}
.news-link{
  display:inline-flex;
  align-items:center;
  gap:4px;
  font-size:14px;
  color:var(--brand-light);
  font-weight:500;
  flex-shrink:0;
}
.news-link:hover{color:var(--cyan)}
.news-empty{
  grid-column:1/-1;
  border:1px dashed rgba(255,255,255,.22);
  border-radius:18px;
  padding:60px 20px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:14px;
  text-align:center;
  color:var(--text-2);
  background:rgba(255,255,255,.02);
}
.news-empty .empty-icon{
  width:56px;
  height:56px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  color:var(--gold);
}
.news-more{
  margin-top:36px;
  display:flex;
  justify-content:center;
}

/* FAQ */
.faq{
  background:linear-gradient(180deg,transparent,rgba(11,31,58,.45),transparent);
}
.faq-wrap{max-width:800px;margin:0 auto}
.faq-item{
  border:1px solid var(--line);
  border-radius:14px;
  margin-bottom:12px;
  background:var(--card);
  backdrop-filter:blur(10px);
  overflow:hidden;
  transition:border-color .25s ease;
}
.faq-item[open]{
  border-color:rgba(43,127,255,.5);
  background:rgba(43,127,255,.04);
}
.faq-item summary{
  display:flex;
  align-items:center;
  gap:14px;
  list-style:none;
  min-height:66px;
  padding:13px 18px;
  cursor:pointer;
  user-select:none;
  font-size:16px;
  color:var(--white);
  font-weight:600;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";
  margin-left:auto;
  font-size:24px;
  color:var(--cyan);
  font-weight:300;
  transition:transform .25s ease;
  flex-shrink:0;
}
.faq-item[open] summary::after{
  content:"−";
  transform:rotate(180deg);
}
.faq-q{
  flex-shrink:0;
  padding:2px 10px;
  border-radius:6px;
  font-size:12px;
  font-weight:700;
  color:var(--gold);
  background:rgba(217,194,126,.1);
}
.faq-a{
  padding:0 20px 22px 64px;
  color:#C6D9F0;
  font-size:15px;
  line-height:1.85;
}
.faq-a a{color:var(--cyan);text-decoration:underline}

/* 咨询表单 */
.contact-grid{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:52px;
  align-items:center;
}
.contact-left h2{margin-bottom:16px}
.contact-left .section-desc{margin-bottom:28px}
.contact-list{display:flex;flex-direction:column;gap:20px}
.contact-item{
  display:flex;
  align-items:flex-start;
  gap:16px;
  padding:18px 20px;
  border-radius:14px;
  background:var(--card);
  border:1px solid var(--line);
  max-width:420px;
}
.contact-item .c-icon{
  width:38px;height:38px;
  flex-shrink:0;
  border-radius:10px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(43,127,255,.14);
  color:var(--brand-light);
}
.c-text strong{
  display:block;
  color:#fff;
  font-size:15px;
  margin-bottom:2px;
}
.c-text span{color:var(--text-2);font-size:14px}
.contact-form-card{
  padding:34px 30px;
  border:1px solid var(--line);
  border-radius:20px;
  background:rgba(255,255,255,.075);
  backdrop-filter:blur(22px);
  box-shadow:0 18px 44px rgba(0,0,0,.28);
}
.form-row-title{font-size:22px;color:#fff;margin-bottom:6px;font-weight:700}
.form-row-sub{font-size:14px;color:var(--text-2);margin-bottom:24px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-field{margin-bottom:16px}
.form-field label{
  display:block;
  font-size:14px;
  color:#C6D8EF;
  font-weight:500;
  margin-bottom:8px;
}
.form-field input,
.form-field select,
.form-field textarea{
  width:100%;
  height:46px;
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.12);
  border-radius:10px;
  padding:0 14px;
  color:#fff;
  font-size:14px;
  outline:none;
  transition:border-color .2s,box-shadow .2s;
}
.form-field textarea{height:104px;padding-top:12px;resize:vertical}
.form-field.full{grid-column:1/-1}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus{
  border-color:#6FC6FF;
  box-shadow:0 0 0 3px rgba(47,128,237,.2);
}
.form-field select{
  appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%237895B8' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 14px center;
  padding-right:36px;
}
.form-field input::placeholder,
.form-field textarea::placeholder{color:#7190B5}
.form-privacy{
  margin-top:4px;
  font-size:13px;
  color:var(--text-2);
}
.form-privacy a{color:var(--cyan)}

/* footer */
.site-footer{
  border-top:1px solid rgba(255,255,255,.08);
  background:linear-gradient(180deg,rgba(7,15,30,.55),rgba(4,9,17,.9));
  padding:52px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.35fr 1fr 1fr 1.15fr;
  gap:42px;
  padding-bottom:46px;
}
.footer-col .brand{margin-bottom:18px}
.footer-brand-text{
  margin-top:4px;
  color:var(--text-2);
  font-size:14px;
  line-height:1.8;
}
.footer-title{
  font-size:15px;
  color:#fff;
  font-weight:700;
  margin-bottom:16px;
}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a,
.footer-links li{
  font-size:14px;
  color:var(--text-2);
  transition:color .2s,transform .25s;
  display:inline-block;
}
.footer-links a:hover{
  color:var(--cyan);
  transform:translateX(3px);
}
.footer-contact li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  margin-bottom:10px;
}
.footer-contact svg{flex-shrink:0;margin-top:4px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.07);
  padding:18px 0;
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:12px;
  color:var(--text-3);
  font-size:13px;
}
.footer-bottom-copy a:hover{color:var(--cyan)}

/* 返回顶部 */
.back-top{
  position:fixed;
  right:22px;
  bottom:30px;
  width:44px;
  height:44px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(43,127,255,.9);
  border:0;
  border-radius:12px;
  color:#fff;
  box-shadow:var(--shadow-cta);
  z-index:99;
  opacity:0;
  visibility:hidden;
  transition:all .3s;
}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{background:var(--brand-light);transform:translateY(-3px)}

/* 动画 */
@keyframes fadeInUp{
  from{opacity:0;transform:translateY(24px)}
  to{opacity:1;transform:translateY(0)}
}
[data-animate]{
  opacity:0;
  animation:fadeInUp .6s ease forwards;
}
[data-animate="1"]{animation-delay:.05s}
[data-animate="2"]{animation-delay:.16s}
[data-animate="3"]{animation-delay:.28s}
[data-animate="4"]{animation-delay:.4s}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none !important;transition:none !important}
  [data-animate]{opacity:1}
}

/* 响应式 */
@media (max-width:1200px){
  .hero .container{grid-template-columns:1.05fr .95fr;gap:36px}
  .compare-grid{gap:28px}
  .news-thumb{flex-basis:190px}
}
@media (max-width:1024px){
  .topbar{flex-wrap:wrap;gap:12px}
  .nav-search{order:3;flex-basis:100%;max-width:none;margin:0}
  .menu-toggle{display:flex}
  .site-nav{
    display:none;
    padding:0 0 18px;
  }
  body.nav-open .site-nav{
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
  }
  body.nav-open .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
  }
  body.nav-open .nav-list a{
    border-radius:10px;
    justify-content:flex-start;
  }
  body.nav-open .nav-list a::after{display:none}
  body.nav-open .hot-tag{margin:4px 0 0 14px}
  .hot-tag{display:none}
  .price-grid{grid-template-columns:1fr 1fr}
  .price-card:first-child{grid-column:1/-1;order:1}
  .price-card.hot{order:0;grid-column:1/2}
  .price-card:last-child{grid-column:2/3}
  .compare-grid{grid-template-columns:1fr;gap:36px}
  .contact-grid{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .section{padding:54px 0}
  .hero{padding:44px 0 64px}
  .hero .container{grid-template-columns:1fr;gap:32px}
  .hero-card{max-width:480px}
  .news-grid{grid-template-columns:1fr}
  .news-card-inner{flex-direction:column;min-height:0}
  .news-thumb{
    flex:0 0 160px;
    width:100%;
    border-right:0;
    border-bottom:1px solid rgba(255,255,255,.06);
  }
  .news-thumb img{height:100%}
  .news-body{padding:18px}
  .contact-form-card{padding:24px 18px}
  .form-grid{grid-template-columns:1fr}
  .form-field.full{grid-column:auto}
  .promo-inner{flex-direction:column;align-items:flex-start;text-align:left;gap:28px;padding:28px 0}
  .countdown{flex-wrap:wrap}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .brand-text{font-size:19px}
  .header-cta .btn{display:none}
  .header-cta .mobile-cta{
    display:inline-flex;
  }
  .grid-table-wrap{overflow-x:auto}
  .section-title{font-size:24px}
  .section-desc{font-size:15px}
  .hero h1{font-size:31px}
  .hero-group-btn.double .btn{width:100%}
  .price-grid{grid-template-columns:1fr}
  .price-grid .price-card{
    grid-column:auto !important;
  }
  .price-card{order:0 !important}
  .compare-table{min-width:520px}
  .promo-copy h2{font-size:24px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: article */
:root {
  --primary: #0B1F3A;
  --primary-2: #0E2A4D;
  --primary-3: #132F57;
  --accent: #2B7FFF;
  --accent-hover: #4D9FFF;
  --accent-soft: rgba(43, 127, 255, .16);
  --cyan: #2DE2E6;
  --gold: #D9C27E;
  --bg-deep: #070F1C;
  --bg-body: #0B1F3A;
  --card-bg: rgba(255, 255, 255, .06);
  --card-bg-hover: rgba(255, 255, 255, .1);
  --card-border: rgba(255, 255, 255, .14);
  --card-border-hover: rgba(255, 255, 255, .24);
  --text-light: #F7FAFF;
  --text-body: #B0C4E0;
  --text-muted: #7895B8;
  --text-weak: #5A7699;
  --color-input-bg: rgba(255,255,255,.07);
  --color-placeholder: #7190B5;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-pill: 24px;
  --shadow-btn: 0 8px 24px rgba(43, 127, 255, .35);
  --shadow-btn-hover: 0 10px 34px rgba(43, 127, 255, .55);
  --shadow-card: 0 12px 30px rgba(0, 0, 0, .42);
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --container: 1320px;
  --ease: .25s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg-body);
  background-image: radial-gradient(ellipse at 20% 0%, rgba(43,127,255,.1) 0%, transparent 60%), radial-gradient(ellipse at 90% 10%, rgba(45,226,230,.06) 0%, transparent 50%), linear-gradient(140deg, #0A1830 0%, #0B1F3A 45%, #0E2A4D 100%);
  background-attachment: fixed;
  color: var(--text-light);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--ease); }
ul, ol { list-style-position: inside; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.container-wide { max-width: 1440px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
.site-header {
  background: rgba(8, 18, 34, .82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,.06);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container-wide {
  display: flex;
  flex-direction: column;
}
.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding-top: 14px;
  padding-bottom: 14px;
  flex-wrap: wrap;
}
.header-left {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.5px;
  color: var(--text-light);
  white-space: nowrap;
  line-height: 1.2;
}
.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  min-height: 42px;
  background: linear-gradient(135deg, #2B7FFF, #1A56C4);
  border-radius: 12px;
  font-size: 17px;
  font-weight: 900;
  color: #fff;
  box-shadow: 0 4px 14px rgba(43,127,255,.4);
}
.brand-text { font-weight: 800; font-size: 21px; letter-spacing: -.5px; color: #fff; }
.header-search {
  flex: 1 1 360px;
  max-width: 560px;
  display: flex;
  justify-content: center;
}
.search-form {
  width: 100%;
  position: relative;
  display: flex;
  align-items: center;
}
.search-form .search-icon {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  width: 17px;
  height: 17px;
  color: var(--text-muted);
  pointer-events: none;
  z-index: 1;
}
.search-form input[type="search"] {
  width: 100%;
  height: 44px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.07);
  padding: 0 118px 0 42px;
  font-size: 15px;
  color: var(--text-light);
  outline: none;
  transition: border-color var(--ease), box-shadow var(--ease), background var(--ease);
}
.search-form input[type="search"]::placeholder { color: var(--color-placeholder); }
.search-form input[type="search"]:focus {
  border-color: rgba(79,159,255,.7);
  box-shadow: 0 0 0 3px rgba(43,127,255,.18), 0 4px 18px rgba(0,0,0,.2);
  background: rgba(255,255,255,.09);
}
.search-form .search-submit {
  position: absolute;
  right: 5px;
  top: 50%;
  transform: translateY(-50%);
  height: 34px;
  border: 0;
  background: linear-gradient(135deg, #2B7FFF, #1F6AE0);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: 20px;
  padding: 0 18px;
  transition: background var(--ease), box-shadow var(--ease);
  white-space: nowrap;
}
.search-form .search-submit:hover { background: linear-gradient(135deg, #3D8CFF, #2B7FFF); box-shadow: 0 4px 12px rgba(43,127,255,.3); }
.header-actions {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 14px;
}
.header-cta {
  height: 42px;
  border: 1px solid rgba(255,255,255,.22);
  background: rgba(255,255,255,.05);
  color: var(--text-light);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  padding: 0 22px;
  line-height: 40px;
  transition: all var(--ease);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.header-cta:hover {
  background: rgba(255,255,255,.12);
  border-color: rgba(255,255,255,.35);
  color: #fff;
}
.header-bottom {
  border-top: 1px solid rgba(255,255,255,.04);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 0;
  padding-bottom: 0;
  min-height: 52px;
  flex-wrap: wrap;
}
.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 18px;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  flex-wrap: wrap;
}
.nav-list a {
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  line-height: 1.4;
  transition: all var(--ease);
  position: relative;
  white-space: nowrap;
}
.nav-list a:hover { color: #fff; background: rgba(255,255,255,.05); }
.nav-list a[aria-current="page"] {
  color: #fff;
  font-weight: 600;
}
.nav-list a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  background: linear-gradient(90deg, #2B7FFF, var(--cyan));
  border-radius: 2px;
  box-shadow: 0 2px 8px rgba(43,127,255,.5);
}
.hot-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--gold);
  background: rgba(217,194,126,.08);
  border: 1px solid rgba(217,194,126,.16);
  border-radius: 16px;
  padding: 4px 12px;
  white-space: nowrap;
}
.hot-tag i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 6px rgba(217,194,126,.7);
}
.nav-toggle {
  display: none;
}

/* mobile header below 1024 */
@media (max-width: 1024px) {
  .header-top { flex-wrap: wrap; gap: 10px; }
  .header-search { order: 3; flex: 0 0 100%; max-width: 100%; }
  .search-form input[type="search"] { padding: 0 118px 0 38px; }
  .nav-toggle { display: inline-flex; }
  .header-bottom { display: none; }
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,.14);
    background: rgba(255,255,255,.05);
    color: #fff;
  }
  .site-nav.mobile-open { display: flex; flex-direction: column; align-items: flex-start; padding: 10px 0 16px; }
  .nav-list { flex-direction: column; width: 100%; align-items: stretch; gap: 2px; }
  .nav-list a { justify-content: flex-start; width: 100%; }
  .hot-tag { margin-left: 0; margin-top: 10px; }
}

@media (max-width: 640px) {
  .header-left { flex: 1; }
  .brand-text { font-size: 18px; }
  .brand-mark { min-width: 36px; min-height: 36px; font-size: 14px; border-radius: 10px; }
  .header-actions .header-cta { display: none; }
  .search-form input[type="search"] { padding: 0 95px 0 36px; }
  .search-form .search-submit { padding: 0 14px; }
}

/* Breadcrumb */
.breadcrumb-bar {
  background: rgba(7,15,28,.5);
  border-bottom: 1px solid rgba(255,255,255,.04);
  padding: 18px 0;
}
.crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
}
.crumbs a { color: var(--text-body); display: inline-flex; align-items: center; gap: 8px; }
.crumbs a:hover { color: #fff; }
.crumbs .sep { color: rgba(255,255,255,.25); }
.crumbs .current {
  color: var(--text-muted);
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Article main */
.article-page {
  padding: 48px 0 30px;
}
.article-wrapper {
  max-width: 840px;
  margin: 0 auto;
}
.article-card-outer {
  background: rgba(255,255,255,.05);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 46px 52px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(0,0,0,.3);
}
.article-card-outer::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -60px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(43,127,255,.16), transparent 70%);
  pointer-events: none;
}

.article-head {
  margin-bottom: 28px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  padding-bottom: 24px;
}
.article-head-cat {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(217,194,126,.1);
  border: 1px solid rgba(217,194,126,.16);
  color: var(--gold);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 16px;
  margin-bottom: 18px;
}
.article-head h1 {
  font-size: 32px;
  line-height: 1.35;
  font-weight: 800;
  color: var(--text-light);
  letter-spacing: -.5px;
  margin-bottom: 16px;
  word-break: break-word;
}
.article-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 14px;
  color: var(--text-muted);
}
.article-meta-row .meta-dot {
  width: 3px;
  height: 3px;
  background: var(--text-weak);
  border-radius: 50%;
}

.article-body {
  font-size: 16px;
  line-height: 1.95;
  color: var(--text-body);
  word-break: break-word;
}
.article-body > * + * { margin-top: 1.2em; }
.article-body h2,
.article-body h3 {
  color: var(--text-light);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -.3px;
  margin-top: 1.8em;
  margin-bottom: .7em;
}
.article-body h2 { font-size: 25px; padding-left: 14px; border-left: 4px solid var(--accent); }
.article-body h3 { font-size: 19px; }
.article-body p { margin-bottom: 1em; }
.article-body ul,
.article-body ol { padding-left: 1.4em; margin-bottom: 1em; }
.article-body li { margin-bottom: .45em; }
.article-body a { color: var(--accent-hover); text-decoration: underline; }
.article-body a:hover { color: #80B8FF; }
.article-body blockquote {
  background: rgba(43,127,255,.07);
  border-left: 4px solid var(--accent);
  padding: 16px 22px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-light);
  font-style: normal;
  margin: 1.6em 0;
}
.article-body blockquote p:last-child { margin-bottom: 0; }
.article-body img { border-radius: 12px; margin: 1.6em 0; box-shadow: 0 8px 20px rgba(0,0,0,.3); }
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 14px;
  background: rgba(255,255,255,.03);
  border-radius: 10px;
  overflow: hidden;
}
.article-body table th,
.article-body table td {
  padding: 12px 16px;
  border: 1px solid rgba(255,255,255,.08);
  text-align: left;
}
.article-body table th { background: rgba(43,127,255,.14); color: var(--text-light); font-weight: 600; white-space: nowrap; }
.article-body code {
  background: rgba(255,255,255,.08);
  padding: 3px 8px;
  border-radius: 5px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: .9em;
  color: #8FD8FF;
}
.article-body pre {
  background: rgba(0,0,0,.35);
  border: 1px solid rgba(255,255,255,.08);
  padding: 18px;
  border-radius: 12px;
  overflow-x: auto;
  margin: 1.6em 0;
}
.article-body pre code { background: none; padding: 0; color: #D8E6F5; }

.article-not-found {
  text-align: center;
  padding: 70px 30px 50px;
}
.article-not-found .nf-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  background: rgba(255,255,255,.05);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--text-muted);
  border: 1px solid rgba(255,255,255,.08);
}
.article-not-found h2 { font-size: 22px; color: var(--text-light); margin-bottom: 8px; }
.article-not-found p { color: var(--text-muted); font-size: 15px; margin-bottom: 22px; }
.article-not-found .btn { display: inline-flex; margin-top: 6px; }

/* CTA strip after article */
.article-cta-strip {
  max-width: 840px;
  margin: 34px auto 0;
  background: linear-gradient(135deg, rgba(43,127,255,.12), rgba(45,226,230,.06)), rgba(255,255,255,.04);
  border: 1px solid rgba(43,127,255,.2);
  border-radius: var(--radius-lg);
  padding: 28px 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.article-cta-strip .txt h4 { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.article-cta-strip .txt p { font-size: 14px; color: var(--text-muted); margin: 0; }

/* buttons basic */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 26px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  border: none;
  transition: all var(--ease);
  text-decoration: none;
  white-space: nowrap;
  line-height: 44px;
}
.btn-primary {
  background: linear-gradient(135deg, #2B7FFF 0%, #1F66E2 100%);
  color: #fff;
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #3D8CFF, #2B7FFF);
  box-shadow: var(--shadow-btn-hover);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,.25);
  color: var(--text-light);
}
.btn-ghost:hover { border-color: rgba(255,255,255,.45); background: rgba(255,255,255,.06); color: #fff; }
.btn-sm { height: 38px; padding: 0 18px; font-size: 14px; line-height: 36px; }

/* Related */
.related-section {
  max-width: 840px;
  margin: 60px auto 10px;
}
.related-section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: -.4px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.related-section-title::before {
  content: "";
  width: 6px;
  height: 22px;
  background: linear-gradient(180deg, #2B7FFF, var(--cyan));
  border-radius: 3px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.related-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: calc(var(--radius-lg) - 2px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--ease);
}
.related-card:hover {
  background: var(--card-bg-hover);
  border-color: var(--card-border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}
.related-card .thumb {
  width: 100%;
  height: 140px;
  object-fit: cover;
  display: block;
}
.related-card .related-body {
  padding: 16px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.related-card .related-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-light);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 48px;
  transition: color var(--ease);
}
.related-card:hover .related-title { color: #fff; }
.related-card .related-date {
  font-size: 13px;
  color: var(--text-weak);
  margin-top: auto;
}

/* Footer */
.site-footer {
  background: #071420;
  border-top: 1px solid rgba(255,255,255,.08);
  margin-top: 80px;
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  max-width: 800px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(43,127,255,.4), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.1fr 1.15fr;
  gap: 40px;
  padding: 60px 0 36px;
}
.footer-col .brand { margin-bottom: 14px; }
.footer-brand-text {
  font-size: 14px;
  color: var(--text-muted);
  letter-spacing: .2px;
  line-height: 1.8;
  max-width: 320px;
  padding-top: 4px;
}
.footer-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 18px;
  letter-spacing: -.2px;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: all var(--ease);
  display: inline-block;
}
.footer-links a:hover { color: #fff; transform: translateX(3px); }
.footer-contact li { font-size: 14px; color: var(--text-muted); line-height: 1.7; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.07);
  padding: 20px 0;
}
.footer-bottom p { font-size: 13px; color: var(--text-weak); margin: 0; }
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .article-card-outer { padding: 38px 30px; }
  .article-head h1 { font-size: 27px; }
}
@media (max-width: 768px) {
  .container, .container-wide { padding-left: 16px; padding-right: 16px; }
  .article-card-outer { padding: 30px 18px; border-radius: 12px; }
  .article-page { padding-top: 20px; }
  .article-body { font-size: 15px; line-height: 1.85; }
  .related-grid { grid-template-columns: 1fr; }
  .article-cta-strip { padding: 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; padding-top: 44px; padding-bottom: 20px; }
  .footer-col { padding-bottom: 10px; }
  .crumbs .current { max-width: 160px; }
}
@media (max-width: 520px) {
  .article-head h1 { font-size: 22px; }
  .article-head-cat { font-size: 12px; padding: 3px 10px; }
  .article-meta-row { font-size: 13px; gap: 10px; }
  .related-card .thumb { height: 160px; }
  .article-cta-strip { flex-direction: column; align-items: stretch; text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* roulang page: category1 */
:root {
      --bg-deep: #081A33;
      --bg-night: #0E2A4D;
      --bg-soft: rgba(255, 255, 255, 0.06);
      --bg-soft-2: rgba(255, 255, 255, 0.09);
      --border-glass: rgba(255, 255, 255, 0.14);
      --primary: #2B7FFF;
      --primary-hover: #4D9FFF;
      --cyan: #2DE2E6;
      --gold: #D9C27E;
      --gold-text: #E2C991;
      --text-hi: #F7FAFF;
      --text-main: #B0C4E0;
      --text-muted: #7895B8;
      --text-faint: #9FB7D4;
      --shadow-cta: 0 8px 24px rgba(43, 127, 255, 0.35);
      --shadow-card: 0 12px 30px rgba(0, 0, 0, 0.42);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 10px;
      --radius-pill: 24px;
      --container: 1280px;
      --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    }

    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-stack);
      background:
        radial-gradient(ellipse at 8% 8%, rgba(43, 127, 255, 0.16), transparent 46%),
        radial-gradient(ellipse at 95% 20%, rgba(45, 226, 230, 0.06), transparent 38%),
        linear-gradient(135deg, #071527 0%, #0B1F3A 48%, #0E2A4D 100%);
      background-attachment: fixed;
      color: var(--text-main);
      line-height: 1.7;
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
    }

    img {
      max-width: 100%;
      display: block;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    button,
    input,
    textarea,
    select {
      font-family: inherit;
    }

    ul,
    ol {
      list-style: none;
    }

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

    .container-wide {
      max-width: 1440px;
      margin: 0 auto;
      padding: 0 32px;
    }

    .section {
      padding: 72px 0;
    }

    .site-header {
      position: relative;
      z-index: 20;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      background: rgba(8, 18, 34, 0.7);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
    }

    .header-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
      min-height: 76px;
      padding-top: 12px;
      padding-bottom: 8px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .brand-mark {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), #1457D6);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 19px;
      font-weight: 800;
      box-shadow: 0 0 18px rgba(43, 127, 255, 0.36);
      letter-spacing: 0;
    }

    .brand-text {
      color: var(--text-hi);
      font-size: 21px;
      font-weight: 700;
      letter-spacing: -0.3px;
      white-space: nowrap;
    }

    .header-search {
      flex: 1;
      max-width: 560px;
      position: relative;
    }

    .search-box {
      display: flex;
      align-items: center;
      gap: 10px;
      height: 44px;
      padding: 0 18px;
      border-radius: var(--radius-pill);
      background: rgba(255, 255, 255, 0.07);
      border: 1px solid rgba(255, 255, 255, 0.14);
      transition: border-color .25s ease, box-shadow .25s ease;
    }

    .search-box:focus-within {
      border-color: #6FC6FF;
      box-shadow: 0 0 0 4px rgba(47, 128, 237, 0.16);
      background: rgba(255, 255, 255, 0.1);
    }

    .search-box svg {
      width: 17px;
      height: 17px;
      color: #9FB7D4;
      flex-shrink: 0;
    }

    .search-box input {
      flex: 1;
      background: transparent;
      border: none;
      outline: none;
      color: var(--text-hi);
      font-size: 15px;
      height: 100%;
    }

    .search-box input::placeholder {
      color: #7190B5;
    }

    .header-btn {
      flex-shrink: 0;
    }

    .header-main {
      border-top: 1px solid rgba(255, 255, 255, 0.04);
    }

    .site-nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 48px;
      gap: 24px;
    }

    .nav-list {
      display: flex;
      align-items: center;
      gap: 6px;
      flex-wrap: wrap;
      padding-top: 4px;
    }

    .nav-list a {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 36px;
      padding: 0 18px;
      border-radius: 8px;
      color: var(--text-muted);
      font-size: 15px;
      font-weight: 500;
      transition: color .25s ease, background .25s ease, box-shadow .25s ease;
      border: 1px solid transparent;
    }

    .nav-list a:hover {
      color: var(--text-hi);
      background: rgba(255, 255, 255, 0.08);
    }

    .nav-list a:focus-visible {
      outline: 2px solid var(--cyan);
      outline-offset: 2px;
    }

    .nav-list a[aria-current="page"] {
      color: #fff;
      background: rgba(43, 127, 255, 0.18);
      border-color: rgba(43, 127, 255, 0.45);
      box-shadow: 0 0 0 1px rgba(43, 127, 255, 0.14), 0 0 20px rgba(43, 127, 255, 0.08) inset;
    }

    .hot-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--gold-text);
      font-size: 13px;
      background: rgba(217, 194, 126, 0.07);
      border: 1px solid rgba(217, 194, 126, 0.2);
      padding: 6px 12px;
      border-radius: 999px;
      white-space: nowrap;
    }

    .hot-tag i {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--gold);
      box-shadow: 0 0 8px var(--gold);
      display: inline-block;
    }

    .hero {
      position: relative;
      min-height: 520px;
      display: flex;
      align-items: center;
      padding: 78px 0 72px;
      overflow: hidden;
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(rgba(7, 21, 39, 0.78), rgba(9, 26, 49, 0.6)),
        url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
      opacity: 0.9;
      z-index: -2;
    }

    .hero::after {
      content: "";
      position: absolute;
      width: 520px;
      height: 520px;
      top: -240px;
      right: -120px;
      background: radial-gradient(circle, rgba(45, 226, 230, 0.14), transparent 65%);
      z-index: -1;
      border-radius: 50%;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      align-items: center;
      gap: 64px;
    }

    .hero-overline {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--cyan);
      font-size: 14px;
      font-weight: 500;
      letter-spacing: 0.4px;
      background: rgba(255, 255, 255, 0.06);
      padding: 8px 14px;
      border-radius: 999px;
      border: 1px solid rgba(255, 255, 255, 0.12);
      margin-bottom: 22px;
    }

    .hero-overline i {
      width: 7px;
      height: 7px;
      background: var(--cyan);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--cyan);
    }

    .hero h1 {
      color: var(--text-hi);
      font-size: 48px;
      line-height: 1.15;
      font-weight: 800;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
    }

    .hero h1 span {
      color: var(--primary-hover);
    }

    .hero-desc {
      font-size: 17px;
      color: var(--text-main);
      max-width: 560px;
      margin-bottom: 28px;
    }

    .hero-cta-row {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 48px;
      padding: 0 26px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, var(--primary), #2B5FE0);
      color: #fff;
      font-size: 16px;
      font-weight: 600;
      border: none;
      cursor: pointer;
      box-shadow: var(--shadow-cta);
      transition: all .25s ease;
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-hover), var(--primary));
      box-shadow: 0 10px 34px rgba(43, 127, 255, 0.55);
      transform: translateY(-1px);
    }

    .btn-primary:focus-visible,
    .btn-ghost:focus-visible {
      outline: 2px solid var(--cyan);
      outline-offset: 3px;
    }

    .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 48px;
      padding: 0 24px;
      border-radius: var(--radius-sm);
      background: transparent;
      border: 1px solid rgba(255, 255, 255, 0.25);
      color: var(--text-hi);
      font-size: 16px;
      font-weight: 500;
      cursor: pointer;
      transition: all .25s ease;
    }

    .btn-ghost:hover {
      border-color: rgba(255, 255, 255, 0.42);
      background: rgba(255, 255, 255, 0.07);
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 12px;
      max-width: 600px;
    }

    .stat-item {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 16px 10px;
      border-radius: var(--radius-md);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      text-align: center;
    }

    .stat-item strong {
      display: block;
      font-size: 22px;
      color: #fff;
      font-weight: 700;
      margin-bottom: 4px;
    }

    .stat-item span {
      display: block;
      font-size: 13px;
      color: var(--text-muted);
    }

    .hero-visual {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.16);
      box-shadow: 0 30px 70px rgba(0, 0, 0, 0.48);
      background: rgba(255, 255, 255, 0.03);
    }

    .hero-visual img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      min-height: 380px;
      max-height: 420px;
    }

    .hero-float-card {
      position: absolute;
      left: 20px;
      bottom: 20px;
      right: 20px;
      background: rgba(5, 18, 40, 0.68);
      border: 1px solid rgba(255, 255, 255, 0.14);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-radius: var(--radius-md);
      padding: 16px 18px;
      color: #fff;
      font-size: 14px;
    }

    .hero-float-card b {
      display: block;
      margin-bottom: 4px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-hi);
    }

    .hero-float-card span {
      color: var(--gold-text);
      font-size: 13px;
    }

    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 54px;
    }

    .section-tag {
      display: inline-block;
      color: var(--gold-text);
      background: rgba(217, 194, 126, 0.09);
      border: 1px solid rgba(217, 194, 126, 0.22);
      padding: 6px 14px;
      border-radius: 99px;
      font-size: 13px;
      margin-bottom: 16px;
    }

    .section-head h2 {
      color: var(--text-hi);
      font-size: 32px;
      font-weight: 700;
      letter-spacing: -0.4px;
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .section-head p {
      color: var(--text-muted);
      font-size: 16px;
    }

    .plan-grid {
      display: grid;
      grid-template-columns: 0.92fr 1.08fr 0.92fr;
      gap: 24px;
      align-items: stretch;
    }

    .plan-card {
      background: var(--bg-soft);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      display: flex;
      flex-direction: column;
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
    }

    .plan-card:hover {
      transform: translateY(-4px);
      border-color: rgba(255, 255, 255, 0.24);
      box-shadow: var(--shadow-card);
    }

    .plan-card.is-hot {
      background: linear-gradient(160deg, rgba(43, 127, 255, 0.15), rgba(15, 45, 95, 0.15));
      border-color: rgba(43, 127, 255, 0.5);
      position: relative;
    }

    .plan-tag {
      display: inline-flex;
      width: fit-content;
      color: var(--cyan);
      background: rgba(45, 226, 230, 0.08);
      border: 1px solid rgba(45, 226, 230, 0.2);
      padding: 4px 12px;
      border-radius: 99px;
      font-size: 13px;
      margin-bottom: 20px;
    }

    .plan-tag.gold-tag {
      color: var(--gold-text);
      background: rgba(217, 194, 126, 0.08);
      border-color: rgba(217, 194, 126, 0.3);
    }

    .plan-card h3 {
      color: var(--text-hi);
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .plan-desc {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.75;
      min-height: 54px;
      margin-bottom: 18px;
    }

    .plan-price {
      padding: 14px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      margin-bottom: 18px;
    }

    .plan-price strong {
      color: #fff;
      font-size: 28px;
      font-weight: 800;
      letter-spacing: -0.4px;
    }

    .plan-price strong small {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 400;
      margin-left: 4px;
    }

    .plan-price span {
      display: block;
      color: var(--gold-text);
      font-size: 13px;
      margin-top: 4px;
    }

    .plan-features {
      margin-bottom: 24px;
      flex: 1;
    }

    .plan-features li {
      color: var(--text-main);
      font-size: 15px;
      padding: 6px 0 6px 22px;
      position: relative;
    }

    .plan-features li::before {
      content: "";
      position: absolute;
      left: 2px;
      top: 15px;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--primary-hover);
      box-shadow: 0 0 8px rgba(43, 127, 255, 0.5);
    }

    .plan-card.is-hot .plan-features li::before {
      background: var(--gold);
      box-shadow: 0 0 8px rgba(217, 194, 126, 0.5);
    }

    .plan-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      border-radius: var(--radius-sm);
      background: rgba(43, 127, 255, 0.12);
      border: 1px solid rgba(43, 127, 255, 0.38);
      color: #fff;
      font-size: 15px;
      font-weight: 500;
      transition: all .25s ease;
    }

    .plan-btn:hover {
      background: rgba(43, 127, 255, 0.28);
      border-color: var(--primary-hover);
    }

    .plan-card.is-hot .plan-btn {
      background: linear-gradient(135deg, var(--primary), #2363D8);
      box-shadow: var(--shadow-cta);
      border: none;
    }

    .plan-card.is-hot .plan-btn:hover {
      box-shadow: 0 10px 34px rgba(43, 127, 255, 0.55);
      transform: translateY(-1px);
    }

    .compare-wrap {
      display: grid;
      grid-template-columns: 0.8fr 1.2fr;
      align-items: center;
      gap: 54px;
    }

    .compare-copy h2 {
      color: var(--text-hi);
      font-size: 32px;
      font-weight: 700;
      letter-spacing: -0.4px;
      line-height: 1.35;
      margin: 12px 0 18px;
    }

    .compare-copy p {
      color: var(--text-main);
      font-size: 16px;
      line-height: 1.85;
      margin-bottom: 22px;
    }

    .feature-check-list {
      margin-bottom: 28px;
    }

    .feature-check-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      color: var(--text-main);
      font-size: 15px;
      padding: 7px 0;
    }

    .feature-check-list li svg {
      width: 18px;
      height: 18px;
      color: var(--cyan);
      flex-shrink: 0;
      margin-top: 4px;
    }

    .link-arrow {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary-hover);
      font-size: 15px;
      font-weight: 500;
      transition: gap .25s ease;
    }

    .link-arrow:hover {
      gap: 12px;
      color: var(--cyan);
    }

    .table-glass {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.14);
      border-radius: var(--radius-lg);
      padding: 12px;
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      overflow: hidden;
    }

    .table-scroll {
      overflow-x: auto;
      border-radius: var(--radius-md);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 620px;
    }

    .compare-table th,
    .compare-table td {
      padding: 13px 16px;
      text-align: left;
      font-size: 14px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      min-height: 44px;
      vertical-align: middle;
    }

    .compare-table th {
      color: var(--text-hi);
      font-weight: 600;
      font-size: 15px;
      white-space: nowrap;
    }

    .compare-table td {
      color: var(--text-main);
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .compare-table tbody tr:hover td {
      background: rgba(255, 255, 255, 0.04);
    }

    .compare-table td:first-child {
      color: var(--text-muted);
      white-space: nowrap;
      font-weight: 500;
    }

    .compare-table .data-hot {
      color: #fff;
      font-weight: 600;
    }

    .scroll-tip {
      display: block;
      text-align: center;
      color: var(--text-faint);
      font-size: 12px;
      padding: 8px 0 2px;
    }

    .split-section {
      padding: 72px 0;
    }

    .split-panel {
      display: grid;
      grid-template-columns: 1fr 1fr;
      align-items: center;
      gap: 64px;
      margin-bottom: 64px;
    }

    .split-panel:last-child {
      margin-bottom: 0;
    }

    .split-panel.reverse .split-text {
      order: 2;
    }

    .split-panel.reverse .split-visual {
      order: 1;
    }

    .split-visual {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.16);
      position: relative;
      box-shadow: 0 22px 60px rgba(0, 0, 0, 0.4);
    }

    .split-visual img {
      width: 100%;
      height: 340px;
      object-fit: cover;
      transition: transform .6s ease;
    }

    .split-panel:hover .split-visual img {
      transform: scale(1.02);
    }

    .split-visual::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      height: 60%;
      background: linear-gradient(transparent, rgba(5, 16, 36, 0.6));
      pointer-events: none;
    }

    .split-text .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--cyan);
      font-size: 14px;
      margin-bottom: 12px;
    }

    .split-text h3 {
      color: var(--text-hi);
      font-size: 30px;
      font-weight: 700;
      line-height: 1.35;
      letter-spacing: -0.4px;
      margin-bottom: 18px;
    }

    .split-text p {
      color: var(--text-main);
      font-size: 16px;
      line-height: 1.9;
      margin-bottom: 22px;
    }

    .split-list {
      display: grid;
      gap: 12px;
      margin-bottom: 24px;
    }

    .split-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      color: var(--text-main);
      font-size: 15px;
    }

    .split-list li svg {
      width: 20px;
      height: 20px;
      color: var(--primary-hover);
      flex-shrink: 0;
      margin-top: 2px;
    }

    .faq-section {
      padding: 72px 0;
      position: relative;
    }

    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: rgba(255, 255, 255, 0.055);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color .25s ease;
    }

    .faq-item.open {
      border-color: rgba(43, 127, 255, 0.38);
    }

    .faq-q {
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      text-align: left;
      background: transparent;
      border: none;
      padding: 20px 22px;
      cursor: pointer;
      color: var(--text-hi);
      font-size: 17px;
      font-weight: 500;
      line-height: 1.5;
      transition: background .25s ease;
    }

    .faq-q:hover {
      background: rgba(255, 255, 255, 0.04);
    }

    .faq-q:focus-visible {
      outline: 2px solid var(--cyan);
      outline-offset: -2px;
      border-radius: var(--radius-md);
    }

    .faq-q .q-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: rgba(43, 127, 255, 0.15);
      border: 1px solid rgba(43, 127, 255, 0.35);
      color: var(--primary-hover);
      font-size: 14px;
      font-weight: 700;
      border-radius: 8px;
      min-width: 34px;
      height: 34px;
      padding: 0 5px;
      flex-shrink: 0;
    }

    .faq-icon {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      border: 1px solid rgba(255, 255, 255, 0.2);
      position: relative;
      flex-shrink: 0;
      transition: transform .3s ease, border-color .3s ease;
    }

    .faq-icon::before,
    .faq-icon::after {
      content: "";
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
      width: 12px;
      height: 2px;
      background: #fff;
      border-radius: 2px;
    }

    .faq-icon::after {
      transform: translate(-50%, -50%) rotate(90deg);
      transition: transform .3s ease;
    }

    .faq-item.open .faq-icon {
      border-color: var(--cyan);
    }

    .faq-item.open .faq-icon::after {
      transform: translate(-50%, -50%) rotate(0deg);
    }

    .faq-a {
      max-height: 0;
      overflow: hidden;
      transition: max-height .35s ease;
    }

    .faq-a-inner {
      padding: 0 24px 22px 70px;
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.9;
    }

    .cta-card {
      background: linear-gradient(135deg, rgba(43, 127, 255, 0.2), rgba(23, 62, 126, 0.2));
      border: 1px solid rgba(43, 127, 255, 0.45);
      border-radius: var(--radius-lg);
      padding: 46px 48px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
      position: relative;
      overflow: hidden;
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
    }

    .cta-card::after {
      content: "";
      position: absolute;
      right: -80px;
      top: -80px;
      width: 260px;
      height: 260px;
      background: radial-gradient(circle, rgba(45, 226, 230, 0.12), transparent 65%);
      pointer-events: none;
      border-radius: 50%;
    }

    .cta-content h2 {
      color: #fff;
      font-size: 28px;
      font-weight: 700;
      letter-spacing: -0.4px;
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .cta-content p {
      color: var(--text-main);
      font-size: 16px;
      max-width: 560px;
    }

    .cta-actions {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-shrink: 0;
      flex-wrap: wrap;
    }

    .site-footer {
      margin-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 60px 0 0;
      background: rgba(5, 16, 30, 0.6);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.3fr 0.9fr 0.9fr 1.2fr;
      gap: 40px;
      padding-bottom: 42px;
    }

    .footer-col .brand {
      margin-bottom: 16px;
    }

    .footer-brand-text {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.9;
      max-width: 300px;
    }

    .footer-title {
      color: var(--text-hi);
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 18px;
    }

    .footer-links {
      display: grid;
      gap: 10px;
    }

    .footer-links a {
      color: var(--text-muted);
      font-size: 15px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      min-height: 32px;
      transition: color .25s ease, transform .25s ease;
    }

    .footer-links a:hover {
      color: var(--text-hi);
      transform: translateX(3px);
    }

    .footer-contact li {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.7;
      padding: 4px 0;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 20px 0 24px;
    }

    .footer-bottom p {
      color: var(--text-muted);
      font-size: 14px;
    }

    @media (max-width: 1180px) {
      .header-search {
        max-width: 420px;
      }

      .hero h1 {
        font-size: 40px;
      }

      .plan-desc {
        min-height: 0;
        margin-bottom: 14px;
      }
    }

    @media (max-width: 1024px) {
      .section {
        padding: 56px 0;
      }

      .header-search {
        max-width: 360px;
      }

      .site-nav {
        flex-wrap: wrap;
        padding: 4px 0;
      }

      .hot-tag {
        display: none;
      }

      .hero {
        padding: 56px 0;
      }

      .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }

      .hero-desc {
        max-width: none;
      }

      .hero-visual img {
        min-height: 260px;
        max-height: 320px;
      }

      .plan-grid {
        grid-template-columns: 1fr 1fr;
      }

      .plan-card.is-hot {
        grid-column: 1 / -1;
        order: -1;
      }

      .compare-wrap {
        grid-template-columns: 1fr;
        gap: 32px;
      }

      .split-panel,
      .split-panel.reverse {
        grid-template-columns: 1fr;
        gap: 30px;
      }

      .split-panel.reverse .split-text {
        order: 1;
      }

      .split-panel.reverse .split-visual {
        order: 2;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
      }
    }

    @media (max-width: 768px) {
      .container,
      .container-wide {
        padding: 0 18px;
      }

      .header-top {
        min-height: 64px;
        gap: 12px;
      }

      .brand-mark {
        width: 36px;
        height: 36px;
        font-size: 17px;
        border-radius: 10px;
      }

      .brand-text {
        font-size: 18px;
      }

      .header-search {
        max-width: none;
        flex: 1;
      }

      .search-box {
        height: 40px;
        padding: 0 14px;
      }

      .header-btn {
        display: none;
      }

      .section-head {
        margin-bottom: 34px;
      }

      .section-head h2,
      .compare-copy h2,
      .split-text h3 {
        font-size: 26px;
      }

      .hero h1 {
        font-size: 34px;
      }

      .hero-desc {
        font-size: 15px;
      }

      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }

      .plan-grid {
        grid-template-columns: 1fr;
      }

      .plan-card.is-hot {
        grid-column: auto;
        order: 0;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }

      .cta-card {
        padding: 32px 24px;
      }
    }

    @media (max-width: 520px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }

      .nav-list {
        gap: 4px;
      }

      .nav-list a {
        padding: 0 12px;
        font-size: 14px;
        min-height: 34px;
      }

      .hero h1 {
        font-size: 29px;
      }

      .hero-stats {
        gap: 8px;
      }

      .stat-item {
        padding: 12px 8px;
      }

      .stat-item strong {
        font-size: 19px;
      }

      .hero-cta-row {
        align-items: stretch;
        flex-direction: column;
      }

      .btn-primary,
      .btn-ghost {
        width: 100%;
      }

      .faq-a-inner {
        padding: 0 16px 16px;
      }

      .faq-q {
        padding: 16px 14px;
      }

      .split-visual img {
        height: 240px;
      }

      .cta-content h2 {
        font-size: 22px;
      }

      .cta-actions {
        width: 100%;
      }

      .cta-actions .btn-primary {
        width: 100%;
      }

      .footer-bottom p {
        font-size: 13px;
      }

      .header-search {
        display: none;
      }

      .header-top {
        justify-content: space-between;
      }
    }

    .btn-primary:active,
    .btn-ghost:active,
    .plan-btn:active {
      transform: translateY(0) scale(0.98);
    }

    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
      }
    }

/* roulang page: category2 */
:root {
            --bg-0: #071226;
            --bg-1: #0B1F3A;
            --bg-2: #0E2A4D;
            --primary: #2B7FFF;
            --primary-hover: #4D9FFF;
            --cyan: #2DE2E6;
            --gold: #D9C27E;
            --white: #F7FAFF;
            --body-text: #B0C4E0;
            --sub-text: #7996B9;
            --muted: #4d6b8f;
            --border: rgba(255, 255, 255, 0.14);
            --card-bg: rgba(255, 255, 255, 0.06);
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-primary: 0 8px 24px rgba(43, 127, 255, 0.35);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background:
                radial-gradient(1100px 430px at 10% -10%, rgba(43, 127, 255, 0.18), transparent 60%),
                radial-gradient(900px 420px at 100% 5%, rgba(45, 226, 230, 0.08), transparent 55%),
                var(--bg-0);
            color: var(--body-text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            display: block;
            max-width: 100%;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            border: 0;
            background: transparent;
        }
        ul {
            list-style: none;
        }
        .container {
            width: min(1280px, calc(100% - 32px));
            margin: 0 auto;
        }
        .container-wide {
            width: min(1320px, calc(100% - 40px));
            margin: 0 auto;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            vertical-align: middle;
            padding: 12px 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            line-height: 1;
            transition: all 0.25s ease;
            cursor: pointer;
            border: 1px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), #1d63ff);
            color: #ffffff;
            box-shadow: var(--shadow-primary);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #3A8DFF, #2B7FFF);
            box-shadow: 0 10px 34px rgba(43, 127, 255, 0.55);
            transform: translateY(-1px);
            color: #fff;
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(255, 255, 255, 0.26);
            color: var(--white);
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
        }
        .btn-ghost:hover {
            border-color: rgba(255, 255, 255, 0.55);
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }
        .btn-light {
            background: rgba(247, 250, 255, 0.14);
            border-color: rgba(255, 255, 255, 0.2);
            color: #F7FAFF;
        }
        .btn-light:hover {
            background: rgba(247, 250, 255, 0.22);
            color: #fff;
        }
        .btn-lg {
            padding: 15px 34px;
            font-size: 16px;
            border-radius: 12px;
        }
        .btn-sm {
            padding: 11px 18px;
            font-size: 14px;
        }
        .link-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #80b5ff;
            font-weight: 600;
            font-size: 15px;
        }
        .link-more svg {
            transition: transform 0.25s ease;
        }
        .link-more:hover {
            color: #b5d4ff;
        }
        .link-more:hover svg {
            transform: translateX(4px);
        }

        /* header */
        .site-header {
            position: relative;
            z-index: 40;
            background: rgba(7, 18, 38, 0.72);
            -webkit-backdrop-filter: blur(16px);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .site-header .container-wide {
            position: relative;
        }
        .header-row {
            display: flex;
            align-items: center;
            gap: 22px;
            min-height: 72px;
            flex-wrap: wrap;
            padding: 8px 0;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 13px;
            font-weight: 800;
            font-size: 16px;
            color: #fff;
            background: linear-gradient(135deg, #2B7FFF, #18b8cf);
            box-shadow: 0 8px 22px rgba(43, 127, 255, 0.4);
            letter-spacing: -0.5px;
        }
        .brand-text {
            font-weight: 750;
            color: var(--white);
            letter-spacing: -0.4px;
            font-size: 20px;
        }
        .search-wrap {
            flex: 1 1 auto;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .header-search {
            display: flex;
            align-items: center;
            gap: 9px;
            width: 100%;
            max-width: 545px;
            height: 44px;
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.13);
            border-radius: 220px;
            padding: 0 6px 0 17px;
            transition: border-color 0.25s, box-shadow 0.25s;
        }
        .header-search:focus-within {
            border-color: rgba(111, 198, 255, 0.85);
            box-shadow: 0 0 0 4px rgba(43, 127, 255, 0.2);
        }
        .header-search svg {
            flex: 0 0 auto;
            opacity: 0.8;
        }
        .search-input {
            flex: 1 1 60px;
            height: 100%;
            border: 0;
            background: transparent;
            outline: none;
            color: var(--white);
            font-size: 15px;
            min-width: 0;
        }
        .search-input::placeholder {
            color: #7595b8;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
            margin-left: auto;
        }
        .nav-mobile-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            gap: 5px;
            flex-direction: column;
        }
        .nav-mobile-toggle span {
            display: block;
            width: 18px;
            height: 2px;
            border-radius: 10px;
            background: #F7FAFF;
            transition: transform 0.25s ease, opacity 0.25s ease;
        }
        .nav-mobile-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-mobile-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-mobile-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .nav-row-wrap {
            display: flex;
            align-items: center;
            min-height: 52px;
            padding-bottom: 8px;
            gap: 18px;
        }
        .site-nav {
            display: flex;
            align-items: center;
            flex: 1 1 auto;
            gap: 18px;
            min-width: 0;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-list a {
            display: inline-flex;
            align-items: center;
            min-height: 36px;
            padding: 6px 14px;
            border-radius: 9px;
            color: #BFD1E6;
            font-weight: 500;
            transition: all 0.22s ease;
        }
        .nav-list a:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #F7FAFF;
        }
        .nav-list a[aria-current="page"] {
            color: #fff;
            background: rgba(43, 127, 255, 0.16);
            box-shadow: inset 0 0 0 1px rgba(77, 159, 255, 0.35), 0 6px 14px rgba(43, 127, 255, 0.12);
        }
        .hot-tag {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            margin-left: auto;
            color: #bdcfe2;
            font-size: 13px;
            white-space: nowrap;
            padding: 8px 14px;
            background: rgba(45, 226, 230, 0.05);
            border: 1px solid rgba(45, 226, 230, 0.14);
            border-radius: 32px;
        }
        .hot-tag i {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #2DE2E6;
            box-shadow: 0 0 0 4px rgba(45, 226, 230, 0.12);
            display: inline-block;
        }

        /* category hero */
        .category-hero {
            position: relative;
            background:
                linear-gradient(100deg, rgba(6, 16, 32, 0.97) 8%, rgba(9, 25, 52, 0.88) 45%, rgba(13, 45, 80, 0.72) 80%),
                url('/assets/images/backpic/back-3.webp') center right / cover no-repeat;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            overflow: hidden;
        }
        .category-hero .hero-inner {
            padding: 88px 0 102px;
            position: relative;
            z-index: 2;
        }
        .hero-overline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--cyan);
            font-weight: 600;
            font-size: 14px;
            margin-bottom: 22px;
            letter-spacing: 0.3px;
        }
        .hero-overline::before {
            content: "";
            width: 24px;
            height: 1px;
            background: rgba(45, 226, 230, 0.65);
        }
        .category-hero h1 {
            font-size: clamp(34px, 5vw, 54px);
            line-height: 1.2;
            color: #ffffff;
            font-weight: 800;
            margin: 0 0 24px;
            letter-spacing: -0.6px;
            max-width: 800px;
        }
        .category-hero .lead {
            color: #Aec4E2;
            max-width: 760px;
            font-size: 17px;
            line-height: 1.9;
            margin: 0 0 22px;
        }
        .hero-note {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 20px;
            margin: 18px 0 26px;
            padding: 14px 18px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.11);
            border-radius: 16px;
            max-width: 680px;
            color: #B9CFEA;
            font-size: 14px;
        }
        .hero-note span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-note svg {
            color: var(--cyan);
        }
        .hero-actions {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 28px;
        }

        /* section global */
        .section {
            padding: 92px 0;
        }
        .section-top-center {
            max-width: 720px;
            margin: 0 auto 58px;
            text-align: center;
        }
        .section-top-center h2,
        .section-head-left h2 {
            color: #fff;
            font-size: clamp(25px, 3.4vw, 34px);
            font-weight: 750;
            line-height: 1.35;
            letter-spacing: -0.4px;
        }
        .section-top-desc {
            color: #839ebc;
            margin-top: 14px;
            font-size: 16px;
        }

        /* process steps */
        .steps-flow {
            display: flex;
            flex-direction: column;
            gap: 74px;
        }
        .step-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            align-items: center;
            gap: 60px;
        }
        .step-row .step-copy {
            order: 1;
        }
        .step-row .step-media {
            order: 2;
        }
        .step-row.reverse .step-copy {
            order: 2;
        }
        .step-row.reverse .step-media {
            order: 1;
        }
        .step-ordinal {
            display: inline-block;
            color: var(--cyan);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 11px;
            padding: 4px 12px;
            border-radius: 100px;
            background: rgba(45, 226, 230, 0.08);
            border: 1px solid rgba(45, 226, 230, 0.2);
        }
        .step-copy h3 {
            color: #F4F8FF;
            font-size: 23px;
            line-height: 1.45;
            margin-bottom: 14px;
            font-weight: 750;
        }
        .step-copy p {
            font-size: 16px;
            color: var(--body-text);
            line-height: 1.9;
            margin-bottom: 18px;
        }
        .check-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
            margin-top: 14px;
        }
        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: #bad0eb;
        }
        .check-list svg {
            flex: 0 0 auto;
            margin-top: 6px;
            color: #43C9D3;
        }
        .step-media {
            position: relative;
            border-radius: 22px;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.13);
            box-shadow: 0 24px 64px rgba(0, 0, 0, 0.35);
        }
        .step-media img {
            aspect-ratio: 4 / 3;
            object-fit: cover;
            width: 100%;
            transition: transform 0.5s ease, opacity 0.5s ease;
        }
        .step-media:hover img {
            transform: scale(1.02);
        }
        .step-media .media-chip {
            position: absolute;
            left: 18px;
            bottom: 18px;
            padding: 9px 16px;
            border-radius: 10px;
            font-size: 13px;
            color: #E5EDFA;
            background: rgba(6, 18, 36, 0.8);
            border: 1px solid rgba(255, 255, 255, 0.18);
            -webkit-backdrop-filter: blur(8px);
            backdrop-filter: blur(8px);
        }

        /* compare section */
        .compare-section {
            background: linear-gradient(180deg, rgba(14, 34, 68, 0.24), rgba(8, 22, 44, 0.45));
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .compare-grid {
            display: grid;
            grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
            gap: 36px;
            align-items: center;
        }
        .table-scroll {
            background: rgba(255, 255, 255, 0.045);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 18px;
            padding: 4px;
            overflow-x: auto;
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
        }
        .table-scroll table {
            width: 100%;
            border-collapse: collapse;
            min-width: 560px;
            font-size: 14px;
        }
        .table-scroll th,
        .table-scroll td {
            padding: 14px 16px;
            text-align: left;
            vertical-align: top;
            line-height: 1.6;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            color: #b6c9e0;
        }
        .table-scroll tr:last-child td,
        .table-scroll tr:last-child th {
            border-bottom: 0;
        }
        .table-scroll thead th {
            background: rgba(43, 127, 255, 0.16);
            color: #ffffff;
            font-weight: 650;
        }
        .table-scroll tbody th {
            color: #E7EFF9;
            background: rgba(255, 255, 255, 0.025);
            width: 24%;
            font-weight: 600;
        }
        .table-scroll tbody td {
            min-width: 150px;
        }
        .table-scroll tbody tr:hover td {
            background: rgba(255, 255, 255, 0.03);
        }
        .mobile-hint {
            display: none;
            font-size: 12px;
            color: #7691b3;
            margin-bottom: 8px;
        }
        .compare-side h2 {
            color: #fff;
            font-size: 30px;
            line-height: 1.4;
            margin-bottom: 18px;
            font-weight: 750;
        }
        .compare-side p {
            color: #9CB4D2;
            margin-bottom: 14px;
        }
        .compare-side ul {
            display: flex;
            flex-direction: column;
            gap: 13px;
            margin-top: 22px;
        }
        .compare-side ul li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            color: #C0D4EC;
            font-size: 15px;
        }
        .compare-side ul svg {
            color: #5CCDDF;
            margin-top: 5px;
        }

        /* FAQ */
        .faq-grid {
            max-width: 960px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            border: 1px solid rgba(255, 255, 255, 0.13);
            border-radius: 18px;
            background: rgba(255, 255, 255, 0.055);
            overflow: hidden;
            transition: background 0.25s ease;
        }
        .faq-item:hover {
            background: rgba(255, 255, 255, 0.075);
        }
        .faq-toggle {
            display: flex;
            align-items: center;
            gap: 14px;
            width: 100%;
            text-align: left;
            padding: 20px 22px;
            min-height: 68px;
            color: #E7EEFA;
            font-weight: 600;
            font-size: 16px;
        }
        .faq-toggle svg {
            flex: 0 0 auto;
            margin-left: auto;
            color: #93ACCB;
            transition: transform 0.3s ease;
        }
        .faq-item.open .faq-toggle svg {
            transform: rotate(180deg);
        }
        .faq-toggle .faq-q-icon {
            display: inline-flex;
            width: 30px;
            height: 30px;
            border-radius: 9px;
            background: rgba(45, 226, 230, 0.12);
            border: 1px solid rgba(45, 226, 230, 0.26);
            color: #a7f1ff;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 800;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-answer p {
            padding: 0 22px 22px 66px;
            color: #ADC2DD;
            font-size: 15px;
            line-height: 1.9;
        }

        /* contact */
        .contact-inner {
            display: grid;
            grid-template-columns: 0.88fr 1.12fr;
            gap: 60px;
            align-items: center;
            background: linear-gradient(135deg, rgba(13, 35, 69, 0.95), rgba(6, 16, 36, 0.95));
            border: 1px solid rgba(255, 255, 255, 0.13);
            padding: 62px 58px;
            border-radius: 26px;
            box-shadow: 0 32px 90px rgba(0, 0, 0, 0.34);
            position: relative;
            overflow: hidden;
        }
        .contact-inner::before {
            content: "";
            position: absolute;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            right: -220px;
            top: -240px;
            background: radial-gradient(circle, rgba(43, 127, 255, 0.3), transparent 65%);
            pointer-events: none;
            z-index: 0;
        }
        .contact-side {
            position: relative;
            z-index: 2;
        }
        .contact-side h2 {
            color: #fff;
            font-size: 30px;
            line-height: 1.4;
            letter-spacing: -0.3px;
            margin-bottom: 16px;
            font-weight: 750;
        }
        .contact-side p {
            color: #A5BAD6;
            margin-bottom: 28px;
        }
        .contact-hours {
            display: flex;
            flex-direction: column;
            gap: 11px;
        }
        .contact-hours li {
            display: flex;
            gap: 12px;
            align-items: center;
            color: #B7C9E1;
            font-size: 15px;
        }
        .contact-hours svg {
            color: var(--cyan);
            flex: 0 0 auto;
        }
        .contact-form-card {
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 20px;
            padding: 32px;
            -webkit-backdrop-filter: blur(16px);
            backdrop-filter: blur(16px);
            position: relative;
            z-index: 2;
        }
        .form-row {
            display: grid;
            gap: 12px;
            margin-bottom: 14px;
        }
        .form-row.two-col {
            grid-template-columns: repeat(2, minmax(0, 1fr));
        }
        .input-label {
            font-size: 13px;
            color: #99b1cf;
            margin-bottom: 6px;
            display: inline-block;
        }
        .control {
            height: 46px;
            width: 100%;
            padding: 0 14px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.14);
            background: rgba(255, 255, 255, 0.07);
            outline: none;
            color: #F1F6FE;
            font-size: 15px;
            transition: all 0.25s;
        }
        textarea.control {
            height: 104px;
            padding: 12px 14px;
            resize: vertical;
        }
        .control::placeholder {
            color: #7190b5;
        }
        .control:focus {
            border-color: #6fc6ff;
            box-shadow: 0 0 0 4px rgba(47, 128, 237, 0.2);
        }
        select.control {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%238eacc8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
            padding-right: 40px;
        }
        select.control option {
            background: #0c203a;
            color: #e5f0ff;
        }
        .btn-form {
            width: 100%;
            min-height: 50px;
        }
        .form-feedback {
            margin-top: 10px;
            text-align: center;
            font-size: 14px;
            color: #48e4a7;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .form-feedback.show {
            opacity: 1;
        }

        /* footer */
        .site-footer {
            background: #050e1d;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 0;
        }
        .site-footer .container {
            padding-top: 64px;
            padding-bottom: 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.9fr 1fr;
            gap: 44px;
            align-items: start;
        }
        .footer-col .brand {
            margin-bottom: 16px;
        }
        .footer-brand-text {
            color: #7c9bbd;
            font-size: 14px;
            line-height: 1.85;
            max-width: 380px;
            margin-top: 16px;
        }
        .footer-title {
            color: #d8e6f5;
            font-size: 16px;
            margin-bottom: 16px;
            font-weight: 650;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
            color: #7895b8;
            font-size: 15px;
        }
        .footer-links a:hover {
            color: #b6d6ff;
        }
        .footer-contact {
            color: #627d9e;
            font-size: 14px;
            line-height: 1.8;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            padding: 20px 0 22px;
            margin-top: 42px;
        }
        .footer-bottom p {
            color: #4d7194;
            font-size: 13px;
        }

        @media (max-width: 1220px) {
            .contact-inner {
                padding: 44px 34px;
                gap: 36px;
            }
            .footer-grid {
                grid-template-columns: 1.2fr 1fr 1fr;
                gap: 30px;
            }
        }
        @media (max-width: 1024px) {
            .nav-mobile-toggle {
                display: inline-flex;
            }
            .header-row {
                gap: 14px;
            }
            .header-actions {
                margin-left: 0;
                order: 2;
            }
            .nav-list a {
                min-height: 44px;
            }
            .site-nav {
                flex-wrap: wrap;
                gap: 8px;
            }
            .hot-tag {
                margin-left: auto;
                margin-top: 4px;
            }
            .nav-row-wrap .nav-list {
                flex-wrap: wrap;
            }
            .step-row,
            .step-row.reverse {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .step-row .step-copy,
            .step-row.reverse .step-copy {
                order: 2;
            }
            .step-row .step-media,
            .step-row.reverse .step-media {
                order: 1;
            }
            .compare-grid {
                grid-template-columns: 1fr;
                gap: 34px;
            }
            .contact-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1.2fr 1fr 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 800px) {
            .category-hero .hero-inner {
                padding: 70px 0 82px;
            }
            .section {
                padding: 64px 0;
            }
            .steps-flow {
                gap: 46px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 640px) {
            body {
                font-size: 15px;
            }
            .header-row {
                flex-wrap: nowrap;
                min-height: 64px;
                gap: 10px;
            }
            .brand-text {
                font-size: 18px;
            }
            .brand-mark {
                width: 36px;
                height: 36px;
                font-size: 14px;
            }
            .header-search {
                max-width: calc(100vw - 130px);
                height: 42px;
                order: 3;
                margin-left: auto;
            }
            .header-actions .btn-ghost {
                font-size: 13px;
                padding: 10px 13px;
                border-radius: 9px;
            }
            .hot-tag {
                width: 100%;
                margin-left: 0;
                justify-content: center;
            }
            .section-top-center {
                margin-bottom: 36px;
            }
            .category-hero h1 {
                font-size: 34px;
            }
            .category-hero .lead {
                font-size: 15px;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-note {
                flex-direction: column;
                gap: 7px;
            }
            .table-scroll table {
                min-width: 520px;
            }
            .mobile-hint {
                display: block;
            }
            .compare-side h2,
            .contact-side h2 {
                font-size: 26px;
            }
            .contact-inner {
                padding: 30px 19px;
            }
            .contact-form-card {
                padding: 20px;
            }
            .form-row.two-col {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .site-footer .container {
                padding-top: 42px;
            }
            .footer-bottom .container-wide {
                flex-direction: column;
                text-align: center;
            }
            .section {
                padding: 50px 0;
            }
            .faq-toggle {
                font-size: 15px;
                padding: 16px;
            }
            .faq-answer p {
                padding: 0 16px 18px 48px;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }
            *,
            *::before,
            *::after {
                transition: none !important;
                animation: none !important;
            }
        }