/* roulang page: index */
:root{
  --primary:#2563EB;
  --primary-hover:#1D4ED8;
  --primary-light:#EFF4FF;
  --secondary:#4B6A8C;
  --border:#DCE6F2;
  --bg:#F7FAFC;
  --card:#FFFFFF;
  --accent:#F59E0B;
  --text:#152A3A;
  --text-2:#57708A;
  --text-3:#98A9B8;
  --success:#10B981;
  --danger:#EF4444;
  --r-btn:10px;
  --r-card:16px;
  --r-input:12px;
  --r-pill:999px;
  --shadow-card:0 4px 20px rgba(21,42,58,.06);
  --shadow-hover:0 18px 36px -18px rgba(21,42,58,.22);
  --container:1200px;
  --header-h:64px;
  --font-stack:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{
  font-family:var(--font-stack);
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input{font:inherit}
button{cursor:pointer;background:none;border:0;color:inherit}
kbd{
  font-family:inherit;
  font-size:11px;
  background:#fff;
  border:1px solid var(--border);
  border-radius:6px;
  padding:2px 7px;
  color:var(--text-2);
}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-alt{background:#F1F5FB}
.section[id]{scroll-margin-top:88px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--primary);
  text-transform:uppercase;
}
.section-head{margin-bottom:44px;max-width:780px}
.section-head h2{
  font-size:30px;
  line-height:1.3;
  font-weight:700;
  margin:10px 0 10px;
}
.section-head p{color:var(--text-2);font-size:15px;max-width:640px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:38px;
  padding:0 20px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  line-height:1;
  transition:all .25s ease;
  white-space:nowrap;
  border:1px solid transparent;
  cursor:pointer;
}
.btn:active{transform:translateY(1px)}
.btn:focus-visible,.nav-link:focus-visible,.search-btn:focus-visible,.icon-btn:focus-visible,.menu-toggle:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 18px -8px rgba(37,99,235,.7)}
.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:0 12px 22px -10px rgba(37,99,235,.75)}
.btn-secondary{background:#fff;border-color:var(--border);color:var(--text)}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}
.btn-ghost{background:transparent;color:var(--text-2)}
.btn-ghost:hover{color:var(--primary);background:var(--primary-light)}
.btn-lg{height:46px;padding:0 26px;font-size:16px}
.btn-white{background:#fff;color:var(--primary)}
.btn-white:hover{background:var(--primary-light);transform:translateY(-1px)}
.btn-outline-white{background:transparent;border-color:rgba(255,255,255,.75);color:#fff}
.btn-outline-white:hover{background:rgba(255,255,255,.15)}
.tag{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:28px;
  padding:0 14px;
  border-radius:var(--r-pill);
  font-size:12px;
  font-weight:600;
  background:var(--primary-light);
  color:var(--primary);
}
.tag-accent{background:#FEF3C7;color:#92400E}
.tag-gray{background:#EDF1F5;color:var(--text-2)}
.card{
  background:var(--card);
  border:1px solid rgba(220,230,242,.7);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  transition:all .3s ease;
}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.text-muted{color:var(--text-2)}
.hidden-xs{display:inline-flex}

/* ===== Header ===== */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  height:var(--header-h);
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid transparent;
  transition:box-shadow .3s ease,border-color .3s ease,background .3s ease;
  box-shadow:0 6px 18px -14px rgba(21,42,58,.12);
}
.site-header.is-scrolled{background:#fff;border-color:var(--border);box-shadow:0 8px 24px -18px rgba(21,42,58,.22)}
.header-inner{display:flex;height:var(--header-h);align-items:center;gap:22px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;
  border-radius:10px;
  background:var(--primary);
  color:#fff;
  font-size:16px;font-weight:700;
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 8px 16px -8px rgba(37,99,235,.8);
}
.brand-text{
  font-weight:700;
  font-size:16px;
  letter-spacing:.5px;
  color:var(--text);
  line-height:1.3;
}
.main-nav{display:flex;align-items:center;gap:4px;margin:0 auto}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  height:var(--header-h);
  padding:0 15px;
  font-size:15px;
  font-weight:500;
  color:var(--text-2);
  transition:color .25s;
}
.nav-link:hover{color:var(--primary)}
.nav-link.active{color:var(--text)}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:0;
  height:2px;
  border-radius:2px;
  background:var(--primary);
}
.header-tools{display:flex;align-items:center;gap:10px}
.search-btn{
  width:238px;
  height:38px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:0 10px 0 14px;
  border-radius:var(--r-pill);
  background:var(--primary-light);
  border:1px solid transparent;
  color:var(--text-2);
  transition:all .3s ease;
  font-size:14px;
  text-align:left;
}
.search-btn i{font-size:13px;color:var(--primary)}
.search-placeholder{flex:1;opacity:.92}
.search-btn:hover{border-color:#C9D9EF;background:#E8F1FF}
.quick-link{
  font-size:14px;
  color:var(--text-2);
  font-weight:600;
  padding:10px 4px;
  transition:color .2s;
}
.quick-link:hover{color:var(--primary)}
.nav-cta{height:36px;padding:0 18px;font-size:14px}
.menu-toggle{
  display:none;
  width:40px;height:40px;
  border-radius:10px;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
  background:var(--primary-light);
}
.menu-toggle span{width:18px;height:2px;border-radius:2px;background:var(--text);transition:.3s}
body.menu-open .menu-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.menu-open .menu-toggle span:nth-child(2){opacity:0}
body.menu-open .menu-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== Hero ===== */
.hero{
  position:relative;
  width:100%;
  overflow:hidden;
  background:var(--bg);
  padding:calc(var(--header-h) + 64px) 0 0;
}
.hero-bg{
  position:absolute;
  inset:0;
  pointer-events:none;
}
.hero-bg::after{
  content:"";
  position:absolute;
  right:-120px;
  top:-130px;
  width:420px;height:420px;
  background:radial-gradient(circle,rgba(37,99,235,.08) 0%,rgba(37,99,235,0) 70%);
}
.hero-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:64px;
  align-items:center;
  position:relative;
}
.hero-copy{max-width:640px}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:34px;
  padding:0 16px;
  border-radius:var(--r-pill);
  background:var(--primary-light);
  color:var(--primary);
  font-weight:600;
  font-size:13px;
  letter-spacing:.04em;
  margin-bottom:20px;
}
.hero h1{
  font-size:42px;
  font-weight:700;
  line-height:1.3;
  letter-spacing:.5px;
  margin:0 0 18px;
}
.hero-lead{
  font-size:17px;
  line-height:1.9;
  color:var(--text-2);
  margin-bottom:32px;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:46px}
.hero-trust{
  display:flex;
  flex-wrap:wrap;
  gap:10px 30px;
  border-top:1px solid var(--border);
  padding-top:18px;
}
.hero-trust li{
  font-size:13px;
  color:var(--text-2);
  display:inline-flex;
  align-items:center;
  gap:7px;
}
.hero-trust i{color:var(--primary);font-size:12px}
.hero-visual{position:relative}
.browser-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:16px;
  box-shadow:0 28px 58px -34px rgba(21,42,58,.28);
  overflow:hidden;
}
.browser-bar{
  height:44px;
  background:#FFFFFF;
  border-bottom:1px solid #EDF2F7;
  display:flex;
  align-items:center;
  gap:8px;
  padding:0 14px;
}
.browser-bar>span{width:10px;height:10px;border-radius:50%;display:inline-block}
.browser-bar>span:nth-child(1){background:#F87171}
.browser-bar>span:nth-child(2){background:#FBBF24}
.browser-bar>span:nth-child(3){background:#34D399}
.browser-cell{
  flex:1;
  height:26px;
  background:var(--bg);
  border-radius:8px;
  margin-left:10px;
  display:flex;
  align-items:center;
  padding:0 14px;
  gap:8px;
  color:var(--text-2);
  font-size:12px;
}
.browser-cell i{font-size:11px;color:var(--success)}
.browser-body{background:var(--primary-light)}
.browser-body img{aspect-ratio:16/10;object-fit:cover;width:100%}

/* ===== Trust strip ===== */
.trust-strip{
  margin-top:72px;
  border-top:1px solid var(--border);
  background:var(--bg);
  padding:26px 0;
}
.trust-strip-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
  color:var(--text-2);
  font-size:14px;
}
.trust-strip-item{display:inline-flex;align-items:center;gap:10px}
.trust-strip-item i{color:var(--primary);width:22px;height:22px;border-radius:8px;background:var(--primary-light);display:inline-flex;align-items:center;justify-content:center;font-size:12px}

/* ===== Features ===== */
.section-features{padding:96px 0 72px}
.features-head{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:26px;
  margin-bottom:48px;
}
.features-head .section-head{margin-bottom:0}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  color:var(--primary);
  font-weight:600;
  font-size:15px;
  white-space:nowrap;
  transition:color .2s;
}
.text-link i{transition:transform .25s}
.text-link:hover{color:var(--primary-hover)}
.text-link:hover i{transform:translateX(4px)}
.bento-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  grid-auto-rows:auto;
  gap:24px;
}
.feature-card{
  background:#fff;
  border:1px solid rgba(220,230,242,.8);
  border-radius:16px;
  padding:34px;
  box-shadow:var(--shadow-card);
  transition:all .3s ease;
  display:flex;
  flex-direction:column;
  gap:14px;
}
.feature-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.feature-card.main{grid-column:span 7}
.feature-card.info{grid-column:span 5}
.feature-card.safe{grid-column:span 5}
.feature-card.update{grid-column:span 7}
.icon-box{
  width:46px;height:46px;
  border-radius:12px;
  background:var(--primary-light);
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:19px;
  margin-bottom:4px;
}
.feature-card h3{font-size:20px;font-weight:700;line-height:1.4}
.feature-card p{color:var(--text-2);font-size:15px;line-height:1.8;flex:1}
.feature-more{margin-top:12px}

/* ===== Demo ===== */
.section-demo{background:#F1F5FB;padding:96px 0}
.demo-grid{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:52px;
  align-items:center;
}
.step-list{position:relative;margin-top:22px}
.step-item{position:relative;display:flex;gap:22px;padding:0 0 34px 0}
.step-item:last-child{padding-bottom:4px}
.step-line{
  position:absolute;
  top:50px;
  bottom:16px;
  left:23px;
  width:1px;
  background:var(--border);
}
.step-item:last-child .step-line{display:none}
.step-num{
  width:46px;height:46px;
  border-radius:50%;
  background:#fff;
  border:1px solid var(--border);
  color:var(--primary);
  font-weight:700;
  font-size:14px;
  flex-shrink:0;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 8px 18px -10px rgba(21,42,58,.14);
}
.step-body{padding-top:2px}
.step-body h3{font-size:17px;font-weight:700;margin-bottom:8px}
.step-body p{font-size:15px;color:var(--text-2);line-height:1.8;max-width:560px}
.demo-visual{position:relative}
.demo-frame{
  border-radius:16px;
  border:1px solid var(--border);
  background:#fff;
  padding:12px;
  box-shadow:0 28px 58px -30px rgba(21,42,58,.3);
}
.demo-frame img{border-radius:10px;aspect-ratio:4/3;object-fit:cover;width:100%}

/* ===== Evidence ===== */
.section-evidence{padding:96px 0}
.evidence-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.evidence-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:16px;
  padding:30px 26px;
  display:flex;
  flex-direction:column;
  gap:12px;
  box-shadow:var(--shadow-card);
  transition:all .3s ease;
}
.evidence-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.evidence-icon{width:42px;height:42px;border-radius:12px;background:var(--primary-light);color:var(--primary);display:inline-flex;align-items:center;justify-content:center;font-size:17px}
.metric-value{font-size:34px;font-weight:700;letter-spacing:-.5px;line-height:1.1;color:var(--text)}
.metric-label{color:var(--text-2);font-size:14px}

/* ===== News ===== */
.section-news{padding:96px 0}
.news-feature{
  display:grid;
  grid-template-columns:55% 45%;
  background:#fff;
  border:1px solid var(--border);
  border-radius:16px;
  overflow:hidden;
  box-shadow:var(--shadow-card);
  margin-bottom:24px;
  transition:all .3s ease;
}
.news-feature:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.news-feature-media{position:relative;min-height:280px;background:var(--primary-light)}
.news-feature-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.news-feature-body{padding:34px 36px;display:flex;flex-direction:column;justify-content:center;gap:14px}
.news-feature h3{font-size:26px;line-height:1.4;font-weight:700}
.news-feature p{color:var(--text-2);font-size:15px;line-height:1.85}
.news-meta{display:flex;align-items:center;gap:20px;font-size:13px;color:var(--text-3);margin-top:auto;padding-top:8px}
.news-meta .read-more{color:var(--primary);font-weight:600;margin-left:auto}
.news-empty{
  background:#fff;
  border:1px dashed #C6D7EA;
  border-radius:16px;
  padding:80px 30px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:16px;
  text-align:center;
  color:var(--text-3);
}
.news-empty i{font-size:40px;color:#C6D7EA}
.news-empty p{font-size:16px}
.news-mini-list{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.news-item{
  background:#fff;
  border:1px solid var(--border);
  border-radius:16px;
  padding:22px;
  display:flex;
  gap:18px;
  box-shadow:var(--shadow-card);
  transition:all .3s ease;
}
.news-item:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.news-item-thumb{width:132px;height:92px;flex-shrink:0;border-radius:10px;overflow:hidden;background:var(--primary-light)}
.news-item-thumb img{width:100%;height:100%;object-fit:cover}
.news-item-content{display:flex;flex-direction:column;gap:8px;min-width:0;flex:1}
.news-item-content h3{font-size:16px;font-weight:700;line-height:1.55;word-break:break-word}
.news-item-content p{font-size:14px;color:var(--text-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item-meta{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--text-3)}
.news-item-meta span{margin-left:auto}

/* ===== Plans ===== */
.section-plans{padding:96px 0;background:#F7FAFC}
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;max-width:1050px;margin:0 auto}
.plan-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:16px;
  padding:34px 28px;
  box-shadow:var(--shadow-card);
  transition:all .3s ease;
  display:flex;
  color:var(--text);
  flex-direction:column;
  gap:6px;
}
.plan-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.plan-card.featured{
  border:1px solid var(--primary);
  background:var(--primary-light);
  box-shadow:0 10px 26px -12px rgba(37,99,235,.35);
  padding-top:48px;
  padding-bottom:48px;
  position:relative;
  margin-top:-12px;
}
.plan-badge{
  position:absolute;
  top:-14px;
  left:50%;
  transform:translateX(-50%);
  background:var(--primary);
  color:#fff;
  height:28px;
  padding:0 18px;
  border-radius:var(--r-pill);
  font-size:12px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  white-space:nowrap;
}
.plan-title{font-weight:700;font-size:20px}
.plan-price{font-size:14px;font-weight:600;color:var(--primary);margin-bottom:16px}
.plan-list{margin:8px 0 22px;display:flex;flex-direction:column;gap:11px}
.plan-list li{position:relative;padding-left:28px;color:var(--text-2);font-size:15px;line-height:1.7}
.plan-list li::before{
  content:"\f00c";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  color:var(--primary);
  position:absolute;left:0;top:2px;
  font-size:11px;
  background:var(--primary-light);
  width:19px;height:19px;
  border-radius:50%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
}
.plan-card.featured .plan-list li::before{background:#fff}

/* ===== FAQ ===== */
.section-faq{padding:96px 0}
.faq-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:54px;align-items:start}
.faq-column{display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:#fff;
  border:1px solid var(--border);
  border-radius:14px;
  overflow:hidden;
  transition:box-shadow .3s ease;
}
.faq-item.open{box-shadow:var(--shadow-card)}
.faq-question{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  text-align:left;
  padding:18px 22px;
  font-size:16px;
  font-weight:600;
  line-height:1.5;
  color:var(--text);
  transition:color .2s;
}
.faq-question:hover{color:var(--primary)}
.faq-icon{
  width:30px;height:30px;
  border-radius:8px;
  background:var(--primary-light);
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:13px;
  flex-shrink:0;
  transition:transform .35s ease;
}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height .4s ease;
  border-top:0 solid var(--border);
}
.faq-item.open .faq-answer{
  max-height:300px;
  border-top-width:1px;
}
.faq-answer-inner{
  padding:4px 22px 20px;
  color:var(--text-2);
  font-size:15px;
  line-height:1.85;
}
.faq-aside{
  position:sticky;
  top:100px;
  background:#fff;
  border-radius:16px;
  border:1px solid var(--border);
  padding:28px;
  box-shadow:var(--shadow-card);
}
.faq-aside h3{font-size:17px;margin-bottom:8px}
.faq-aside p{color:var(--text-2);font-size:14px;line-height:1.8;margin-bottom:16px}

/* ===== CTA ===== */
.section-cta{padding:0 0 96px}
.cta-panel{
  background:var(--primary);
  border-radius:22px;
  padding:60px 50px;
  color:#fff;
  text-align:center;
}
.cta-panel h2{font-size:28px;line-height:1.4;margin-bottom:12px}
.cta-panel p{color:rgba(255,255,255,.88);font-size:16px;max-width:640px;margin:0 auto 30px}
.cta-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* ===== Footer ===== */
.site-footer{background:#fff;border-top:1px solid var(--border)}
.footer-main{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:48px;
  padding:70px 0 46px;
}
.footer-brand p{
  color:var(--text-2);
  font-size:14px;
  line-height:1.8;
  max-width:340px;
  margin:18px 0 22px;
}
.social-row{display:flex;gap:10px}
.social-btn{
  width:36px;height:36px;
  border-radius:10px;
  border:1px solid var(--border);
  background:#fff;
  color:var(--text-2);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:14px;
  transition:all .25s;
}
.social-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light);transform:translateY(-1px)}
.footer-title{font-size:15px;font-weight:700;margin-bottom:18px}
.footer-links{display:flex;flex-direction:column;gap:12px;font-size:14px;color:var(--text-2)}
.footer-links a{transition:color .2s}
.footer-links a:hover{color:var(--primary)}
.footer-bottom{
  border-top:1px solid var(--border);
  padding:22px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);transition:color .2s}
.footer-bottom a:hover{color:var(--primary)}
.footer-legal{display:flex;gap:18px;flex-wrap:wrap}

/* ===== Float CTA ===== */
.float-cta{
  position:fixed;
  right:26px;
  bottom:30px;
  z-index:100;
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  background:var(--primary);
  color:#fff;
  font-size:14px;
  font-weight:600;
  border-radius:var(--r-pill);
  box-shadow:0 16px 32px -12px rgba(37,99,235,.7);
  opacity:0;
  transform:translateY(14px);
  pointer-events:none;
  transition:all .35s ease;
}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{background:var(--primary-hover);transform:translateY(-2px)}
.float-cta i{font-size:13px}

/* ===== Mobile Menu ===== */
@media (max-width:1023.98px){
  .main-nav{
    position:fixed;
    top:var(--header-h);
    left:0;right:0;
    background:#fff;
    flex-direction:column;
    align-items:stretch;
    padding:12px 24px 20px;
    border-bottom:1px solid var(--border);
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:all .28s ease;
    box-shadow:0 30px 42px -32px rgba(21,42,58,.25);
    display:flex;
    z-index:99;
  }
  body.menu-open .main-nav{opacity:1;visibility:visible;transform:translateY(0)}
  .nav-link{height:46px;padding:0;border-bottom:1px solid #F0F4F8;border-radius:8px}
  .nav-link:last-child{border-bottom:0}
  .nav-link.active{background:var(--primary-light);color:var(--primary);padding-left:14px}
  .nav-link.active::after{display:none}
  .header-tools{max-width:260px;margin-left:10px}
  .search-btn{width:190px;padding-left:10px}
  .quick-link{display:none}
  .nav-cta{padding:0 12px;font-size:13px}
}
@media (max-width:767.98px){
  .header-tools .search-btn{width:38px;padding:0;justify-content:center;border-radius:50%}
  .header-tools .search-placeholder{display:none}
  .header-tools .nav-cta{padding:0 10px}
  .search-btn kbd{display:none}
  .header-tools{gap:8px}
  .menu-toggle{display:inline-flex}
  .main-nav{top:var(--header-h)}
  .section{padding:72px 0}
  .section-demo,.section-news,.section-faq{padding:72px 0}
  .hero{padding:calc(var(--header-h) + 42px) 0 0}
  .hero h1{font-size:28px}
  .hero-lead{font-size:16px}
  .hero-grid,.demo-grid,.faq-wrap{grid-template-columns:1fr;gap:40px}
  .features-head{flex-direction:column;align-items:flex-start;gap:14px}
  .bento-grid{grid-template-columns:1fr}
  .feature-card.main,.feature-card.info,.feature-card.safe,.feature-card.update{grid-column:span 1}
  .evidence-grid,.plan-grid,.news-mini-list{grid-template-columns:1fr}
  .plan-card.featured{margin-top:0}
  .news-feature{grid-template-columns:1fr}
  .news-feature-media{min-height:200px}
  .news-feature-body{padding:26px}
  .news-feature h3{font-size:20px}
  .news-item{flex-direction:row}
  .footer-main{grid-template-columns:1fr 1fr;gap:34px;padding:52px 0 38px}
  .float-cta{left:16px;right:16px;bottom:16px;justify-content:center}
  .footer-bottom{justify-content:center;text-align:center}
  .footer-legal{justify-content:center}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .hero-grid{gap:30px}
  .hero-actions .btn{flex:1 1 100%;max-width:100%}
  .btn-lg{width:100%}
  .trust-strip{display:none}
  .feature-card{padding:26px}
  .news-item{flex-direction:column}
  .news-item-thumb{width:100%;height:110px}
  .news-item-meta{flex-wrap:wrap}
  .cta-panel{padding:40px 20px}
  .cta-actions .btn{flex:1 1 100%}
  .footer-main{grid-template-columns:1fr}
  .site-footer .container:last-child .footer-bottom{flex-direction:column}
}

/* roulang page: article */
:root {
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --primary-light: #EFF4FF;
  --secondary: #4B6A8C;
  --border: #DCE6F2;
  --bg: #F7FAFC;
  --card-bg: #FFFFFF;
  --accent: #F59E0B;
  --text: #152A3A;
  --text-light: #57708A;
  --text-lighter: #98A9B8;
  --success: #10B981;
  --error: #EF4444;
  --radius-btn: 10px;
  --radius-card: 16px;
  --shadow: 0 4px 20px rgba(21,42,58,0.06);
  --shadow-hover: 0 18px 36px -18px rgba(21,42,58,0.22);
  --container-width: 1200px;
  --header-h: 64px;
  --transition: all 0.3s ease;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* header + nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(220,230,242,0.7);
  transition: var(--transition);
}
.site-header .container {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: nowrap;
}
.header-left {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-shrink: 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0;
}
.brand-mark {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}
.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  line-height: 1.3;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 400;
  color: var(--text-light);
  border-radius: 8px;
  position: relative;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}
.nav-link:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.nav-link.active {
  color: var(--text);
  font-weight: 600;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.nav-link:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.header-btn-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.btn-search {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 38px;
  padding: 0 12px;
  background: var(--primary-light);
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--text-light);
  font-size: 14px;
  transition: var(--transition);
  cursor: pointer;
}
.btn-search:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.btn-search:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.search-kbd {
  font-size: 12px;
  background: rgba(255,255,255,0.8);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 6px;
  color: var(--text-lighter);
  white-space: nowrap;
}
.btn-ghost {
  height: 38px;
  padding: 0 16px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: var(--radius-btn);
  border: 1px solid var(--border);
  color: var(--text-light);
  background: #fff;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
  cursor: pointer;
}
.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
.btn-primary {
  height: 38px;
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: var(--radius-btn);
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  white-space: nowrap;
  cursor: pointer;
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px -8px rgba(37,99,235,0.5);
}
.btn-primary:focus-visible,
.btn-ghost:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.btn-mobile {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.mobile-overlay {
  display: none;
}
.mobile-menu {
  display: none;
}

/* breadcrumb */
.breadcrumb {
  padding: 20px 0 0;
  font-size: 14px;
}
.breadcrumb a {
  color: var(--text-light);
  text-decoration: none;
  transition: color .2s;
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb span {
  color: var(--text-lighter);
  margin: 0 8px;
}
.breadcrumb em {
  font-style: normal;
  color: var(--text);
  font-weight: 500;
  display: inline-block;
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  vertical-align: bottom;
}

/* article layout */
.article-section {
  padding: 16px 0 56px;
}
.article-layout {
  display: grid;
  grid-template-columns: 1fr 330px;
  gap: 36px;
  align-items: start;
  margin-top: 16px;
}
.article-main {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 48px;
  box-shadow: var(--shadow);
}
.article-top.meta {
  margin-bottom: 24px;
}
.article-top .cat-label {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 12px;
}
.article-top h1 {
  font-size: 30px;
  line-height: 1.4;
  color: var(--text);
  font-weight: 700;
  margin-bottom: 14px;
}
.article-top .meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 14px;
  color: var(--text-lighter);
  align-items: center;
}
.article-top .meta-row i {
  margin-right: 4px;
  color: var(--text-lighter);
}
.article-body {
  border-top: 1px solid var(--border);
  padding-top: 28px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
}
.article-body p {
  margin-bottom: 20px;
  text-align: justify;
}
.article-body h2 {
  font-size: 23px;
  line-height: 1.5;
  margin: 36px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  color: var(--text);
  font-weight: 700;
}
.article-body h3 {
  font-size: 19px;
  line-height: 1.5;
  margin: 28px 0 12px;
  font-weight: 600;
}
.article-body a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color .2s;
}
.article-body a:hover {
  color: var(--primary-hover);
}
.article-body ul,
.article-body ol {
  margin: 16px 0 22px;
  padding-left: 6px;
  list-style: none;
}
.article-body ul li,
.article-body ol li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
  line-height: 1.8;
}
.article-body ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 13px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0.7;
}
.article-body ol {
  counter-reset: article-ol;
}
.article-body ol li {
  counter-increment: article-ol;
}
.article-body ol li::before {
  content: counter(article-ol) ".";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--primary);
  font-weight: 700;
  font-size: 16px;
  width: 20px;
  text-align: right;
}
.article-body blockquote {
  background: var(--primary-light);
  border-radius: 12px;
  padding: 18px 22px;
  margin: 22px 0;
  color: var(--text-light);
  font-size: 15px;
  position: relative;
}
.article-body blockquote p {
  margin-bottom: 0;
}
.article-body img {
  border-radius: 16px;
  border: 1px solid var(--border);
  margin: 24px auto;
  width: 100%;
}
.article-body figure {
  margin: 24px 0;
  text-align: center;
}
.article-body figcaption {
  font-size: 13px;
  color: var(--text-lighter);
  margin-top: 6px;
}
.article-body code {
  background: #F2F5F9;
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 14px;
  color: var(--primary);
  border: 1px solid var(--border);
  word-break: break-all;
}
.article-body kbd {
  background: #F2F5F9;
  border-radius: 8px;
  padding: 3px 8px;
  font-size: 13px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  color: var(--text);
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}
.article-body table th {
  background: var(--primary-light);
  color: var(--text);
  font-weight: 600;
  text-align: left;
  padding: 12px 16px;
  border: 1px solid var(--border);
}
.article-body table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  line-height: 1.7;
}

/* article-not-found */
.article-not-found {
  text-align: center;
  padding: 60px 30px;
}
.article-not-found .tip-icon {
  width: 72px;
  height: 72px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  font-size: 30px;
}
.article-not-found h1 {
  font-size: 24px;
  margin-bottom: 12px;
}
.article-not-found p {
  color: var(--text-light);
  font-size: 15px;
}
.article-not-found .btn-primary {
  margin-top: 20px;
}

/* sidebar */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: sticky;
  top: 80px;
}
.sidebar-card {
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 22px;
  box-shadow: var(--shadow);
}
.sidebar-card .sidebar-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
  position: relative;
  padding-left: 12px;
}
.sidebar-card .sidebar-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 18px;
  border-radius: 3px;
  background: var(--primary);
}
.sidebar-note p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-light);
}
.sidebar-label {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 10px;
  font-weight: 500;
}
.sidebar-related-list a {
  display: block;
  padding: 12px 0;
  border-bottom: 1px dashed var(--border);
  transition: var(--transition);
}
.sidebar-related-list a:last-child {
  border-bottom: none;
}
.sidebar-related-list a:hover .rel-title {
  color: var(--primary);
}
.rel-cat {
  font-size: 12px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 2px 10px;
  border-radius: 999px;
  display: inline-block;
  margin-bottom: 6px;
  font-weight: 500;
}
.rel-title {
  font-size: 14px;
  line-height: 1.6;
  font-weight: 500;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color .2s;
}
.rel-date {
  font-size: 12px;
  color: var(--text-lighter);
  margin-top: 6px;
}
.sidebar-btn-wrap {
  text-align: center;
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 22px;
  background: var(--primary-light);
  border: 1px solid var(--primary);
  border-radius: var(--radius-btn);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
}
.btn-secondary:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-1px);
}
.btn-secondary:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* related posts bottom */
.related-section {
  padding: 16px 0 64px;
}
.related-section > .container .section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 24px;
}
.related-section .section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.related-card {
  display: flex;
  gap: 16px;
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 14px;
  box-shadow: 0 2px 10px rgba(21,42,58,0.04);
  transition: var(--transition);
}
.related-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: #c7d6e8;
  cursor: pointer;
}
.related-card img {
  width: 140px;
  height: 100px;
  border-radius: 12px;
  object-fit: cover;
  border: 1px solid var(--border);
  flex-shrink: 0;
}
.related-card .rc-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  flex: 1;
}
.rc-tag {
  font-size: 12px;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: 999px;
  padding: 3px 12px;
  display: inline-block;
  width: fit-content;
  font-weight: 500;
  margin-bottom: 6px;
}
.rc-title {
  font-size: 15px;
  line-height: 1.6;
  font-weight: 600;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color .2s;
}
.rc-date {
  font-size: 12px;
  color: var(--text-lighter);
  margin-top: 6px;
}

/* footer */
.site-footer {
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 56px 0 28px;
  margin-top: 8px;
}
.site-footer .footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 36px;
}
.site-footer .footer-brand .brand {
  margin-bottom: 12px;
}
.site-footer .footer-brand > p {
  font-size: 14px;
  color: var(--text-light);
  max-width: 340px;
  line-height: 1.8;
  margin-bottom: 16px;
}
.social-row {
  display: flex;
  gap: 8px;
}
.social-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary-light);
  border: 1px solid transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  cursor: pointer;
  font-size: 15px;
  transition: var(--transition);
}
.social-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.site-footer .footer-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
  position: relative;
}
.site-footer .footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.site-footer .footer-links a {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  transition: var(--transition);
  width: fit-content;
}
.site-footer .footer-links a:hover {
  color: var(--primary);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-lighter);
}
.footer-legall {
  display: flex;
  gap: 18px;
}
.footer-legal a {
  color: var(--text-lighter);
  transition: var(--transition);
}
.footer-legal a:hover {
  color: var(--primary);
}
.footer-bottom a {
  color: var(--text-lighter);
  text-decoration: none;
}
.footer-bottom a:hover {
  color: var(--primary);
}

/* floating cta */
.floating-cta {
  position: fixed;
  right: 28px;
  bottom: 32px;
  z-index: 90;
  display: flex;
}
.floating-cta .btn-floating {
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  height: 46px;
  padding: 0 26px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 8px 24px -8px rgba(37,99,235,0.5);
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.floating-cta .btn-floating:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -10px rgba(37,99,235,0.6);
}

/* == responsive == */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }
  .main-nav {
    display: none;
  }
  .btn-ghost, .btn-search {
    display: none;
  }
  .btn-mobile {
    display: flex;
  }
  .header-btn-group {
    gap: 6px;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    position: static;
  }
  .sidebar-card {
    width: 100%;
  }
  .article-main {
    padding: 30px 28px;
  }
}
@media (max-width: 900px) {
  .site-footer .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  .article-section {
    padding: 12px 0 40px;
  }
  .article-main {
    padding: 22px 16px;
  }
  .article-top h1 {
    font-size: 22px;
  }
  .article-top .meta-row {
    gap: 12px;
  }
  .article-body {
    font-size: 15px;
  }
  .article-body h2 {
    font-size: 19px;
  }
  .article-sidebar {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .related-card img {
    width: 110px;
    height: 88px;
  }
  .breadcrumb {
    font-size: 13px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }
  .floating-cta {
    left: 16px;
    right: 16px;
    bottom: 16px;
    max-height: 0;
    overflow: visible;
    justify-content: center;
    pointer-events: none;
    margin: 0;
  }
  .floating-cta .btn-floating {
    width: 100%;
    justify-content: center;
    pointer-events: auto;
    height: 44px;
  }
  .site-footer {
    padding: 40px 0 80px;
  }
}

/* mobile menu drawer */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -290px;
  width: 280px;
  height: 100vh;
  background: #fff;
  z-index: 999;
  box-shadow: -8px 0 30px rgba(21,42,58,0.14);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  padding: 80px 24px 32px;
  visibility: hidden;
}
.mobile-menu.open {
  right: 0;
  visibility: visible;
}
.mobile-menu a {
  padding: 12px 8px;
  font-size: 15px;
  color: var(--text-light);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.mobile-menu a:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.mobile-menu a.btn-mobile-cta {
  background: var(--primary);
  color: #fff;
  border-radius: 12px;
  margin-top: 20px;
  text-align: center;
  border: none;
}
.mobile-menu-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(21,42,58,0.35);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}
.mobile-menu-backdrop.show {
  opacity: 1;
  visibility: visible;
}
.mobile-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
}

/* focus visible */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* dark mode? no — 仅标准模式 */

/* roulang page: category1 */
:root{
  --primary:#2563EB;
  --primary-hover:#1D4ED8;
  --primary-soft:#EFF4FF;
  --blue:#4B6A8C;
  --line:#DCE6F2;
  --bg-page:#F7FAFC;
  --bg-card:#FFFFFF;
  --bg-soft:#F1F5FB;
  --border-light:#EAF0F6;
  --warning:#F59E0B;
  --success:#10B981;
  --danger:#EF4444;
  --text-title:#152A3A;
  --text-body:#334E62;
  --text-secondary:#57708A;
  --text-muted:#98A9B8;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-input:12px;
  --shadow-card:0 4px 20px rgba(21,42,58,.06);
  --shadow-hover:0 18px 36px -18px rgba(21,42,58,.22);
  --transition:.2s ease;
  --header-height:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Helvetica Neue",Arial,sans-serif;font-size:16px;line-height:1.9;background:var(--bg-page);color:var(--text-body);-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{color:var(--text-title);line-height:1.3;margin:0}
p{margin:0}
a{color:var(--primary);text-decoration:none;transition:color var(--transition),background var(--transition),border-color var(--transition),box-shadow var(--transition)}
a:focus-visible,button:focus-visible,summary:focus-visible,label:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
section{scroll-margin-top:calc(var(--header-height) + 20px)}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:10px 20px;
  border-radius:var(--radius-btn);border:1px solid transparent;font-size:15px;font-weight:600;
  line-height:1.4;cursor:pointer;transition:var(--transition);background:transparent;color:inherit;
  text-align:center;white-space:nowrap;
}
.btn-sm{padding:7px 14px;font-size:14px;min-height:32px}
.btn-lg{padding:13px 28px;font-size:16px;min-height:46px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 14px rgba(37,99,235,.18)}
.btn-primary:hover{background:var(--primary-hover);color:#fff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(37,99,235,.24)}
.btn-secondary{background:#fff;border-color:var(--line);color:var(--primary)}
.btn-secondary:hover{border-color:var(--primary);background:var(--primary-soft);color:var(--primary);transform:translateY(-1px)}
.btn-ghost-white{border-color:rgba(255,255,255,.75);color:#fff;background:rgba(255,255,255,.08)}
.btn-ghost-white:hover{background:#fff;color:var(--primary);border-color:#fff}
.eyebrow{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;letter-spacing:.2px;color:var(--primary);background:var(--primary-soft);border-radius:999px;padding:6px 14px}
.section-head{max-width:800px;margin-bottom:38px}
.section-head h2{font-size:30px;font-weight:700;margin:14px 0 10px}
.section-head p{color:var(--text-secondary);font-size:16px}
.section{padding:88px 0}
.site-header{position:sticky;top:0;z-index:1000;height:var(--header-height);background:#fff;border-bottom:1px solid var(--line)}
.site-header::after{content:"";position:absolute;left:0;right:0;bottom:-12px;height:12px;background:linear-gradient(180deg,rgba(21,42,58,.04),rgba(21,42,58,0));pointer-events:none}
.header-inner{position:relative;display:flex;height:var(--header-height);align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;border-radius:10px}
.brand-mark{width:40px;height:40px;border-radius:13px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:700;box-shadow:0 8px 16px rgba(37,99,235,.25)}
.brand-text{font-weight:700;font-size:17px;color:var(--text-title);letter-spacing:.2px}
.header-inner .main-nav{display:flex;align-items:center;justify-content:center;gap:4px;margin:0 auto}
.nav-link{display:block;padding:10px 14px;border-radius:8px;color:var(--text-secondary);font-weight:500;font-size:15px;position:relative}
.nav-link:hover{color:var(--primary);background:var(--primary-soft)}
.nav-link.active{color:var(--primary);font-weight:600;background:var(--primary-soft)}
.nav-link.active::after{content:"";position:absolute;left:16px;right:16px;bottom:-4px;height:2px;background:var(--primary)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.command-search{display:flex;align-items:center;gap:8px;background:var(--bg-page);border:1px solid var(--border-light);border-radius:999px;padding:7px 12px 7px 14px;min-width:170px;color:var(--text-secondary);transition:var(--transition)}
.command-search:hover{border-color:var(--line);background:#fff}
.command-search .fa-magnifying-glass{font-size:13px;color:var(--text-muted)}
.search-placeholder{font-size:13px;color:var(--text-muted)}
.cmd-badge{font-size:11px;color:var(--text-secondary);background:#fff;border:1px solid var(--line);border-radius:6px;padding:1px 5px;line-height:1.6}
.quick-link{font-size:14px;color:var(--text-secondary);font-weight:500;padding:7px 10px;border-radius:8px}
.quick-link:hover{color:var(--primary);background:var(--primary-soft)}
.site-header .mobile-menu, .site-header .nav-toggle, .site-header .nav-toggle-btn{display:none}
.mobile-panel{display:none}
details.mobile-menu summary{list-style:none;display:flex;align-items:center;justify-content:center;color:var(--text-title);background:var(--primary-soft);border-radius:10px;width:42px;height:42px}
details.mobile-menu summary::-webkit-details-marker{display:none}
details.mobile-menu summary i{color:var(--primary)}
.breadcrumb-row{padding:20px 0 0;background:#fff}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;font-size:14px;color:var(--text-secondary)}
.breadcrumb a{color:var(--text-secondary);margin-right:6px}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb span.sep{margin:0 6px;color:var(--text-muted)}
.breadcrumb .current{color:var(--text-title);font-weight:500;cursor:default}
.category-hero{padding:56px 0 64px;background:#fff;border-bottom:1px solid var(--border-light)}
.hero-layout{display:grid;grid-template-columns:1.25fr .9fr;gap:52px;align-items:center}
.hero-copy .eyebrow{margin-bottom:18px}
.hero-copy h1{font-size:24px;line-height:1.4;margin:0;letter-spacing:.3px}
.hero-copy h1 .hero-mark{display:block;margin-top:12px;font-size:22px;font-weight:600;line-height:1.3}
.hero-desc{color:var(--text-secondary);margin:22px 0 30px;font-size:16px;line-height:1.9;max-width:620px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-pic{position:relative}
.browser-card{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-card);overflow:hidden}
.browser-bar{height:52px;display:flex;align-items:center;padding:0 16px;gap:8px;background:#fff;border-bottom:1px solid var(--border-light)}
.browser-bar i{font-size:10px;color:var(--text-muted)}
.browser-bar span{color:var(--text-muted);font-size:11px;margin-left:8px}
.browser-pic{background:var(--bg-soft);overflow:hidden}
.browser-pic img{height:330px;width:100%;object-fit:cover}
.hero-note{margin-top:12px;font-size:13px;color:var(--text-muted);text-align:right;padding-right:6px}
.guide-focus-section{background:var(--bg-page);padding:80px 0 56px}
.guide-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:28px}
.guide-main{grid-column:span 8;background:#fff;border:1px solid var(--border-light);border-radius:24px;padding:40px 44px;box-shadow:var(--shadow-card)}
.guide-main h2{font-size:24px;font-weight:700;margin-bottom:18px}
.guide-main p{color:var(--text-body);font-size:15px;line-height:1.9;margin-bottom:14px}
.guide-note{margin:22px 0 0;padding:0;list-style:none}
.guide-note li{position:relative;padding:8px 0 8px 28px;color:var(--text-secondary);font-size:15px;line-height:1.8}
.guide-note li::before{content:"\f00c";font-family:"Font Awesome 6 Free";font-weight:900;color:var(--primary);position:absolute;left:0;top:10px;width:18px;height:18px;background:var(--primary-soft);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:9px}
.aside-sticky{grid-column:span 4;position:sticky;top:calc(var(--header-height) + 32px);align-self:start}
.security-box{background:var(--bg-soft);border:1px solid rgba(245,158,11,.22);border-radius:20px;padding:28px;overflow:hidden;position:relative}
.security-box .icon-circle{width:44px;height:44px;border-radius:14px;background:rgba(245,158,11,.14);color:var(--warning);display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:18px}
.security-box h3{font-size:18px;font-weight:700;margin-bottom:12px}
.security-box p{font-size:14px;line-height:1.9;color:var(--text-secondary);margin-bottom:12px}
.security-tip-list{list-style:none;margin:16px 0 0;padding:0}
.security-tip-list li{position:relative;padding-left:26px;color:var(--text-secondary);font-size:14px;margin-bottom:10px;line-height:1.8}
.security-tip-list li::before{content:"\f071";font-family:"Font Awesome 6 Free";font-weight:900;color:var(--warning);font-size:12px;position:absolute;left:0;top:4px}
.flow-section{background:#fff;padding:80px 0}
.flow-section .section-head h2{font-size:30px}
.flow-list{display:grid;gap:26px;max-width:1120px}
.flow-card{display:grid;grid-template-columns:120px 1fr;gap:24px;background:var(--bg-soft);border:1px solid var(--border-light);border-radius:24px;padding:34px 38px;transition:var(--transition)}
.flow-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);border-color:var(--line)}
.flow-num{font-size:44px;font-weight:700;color:var(--primary);line-height:1;letter-spacing:-1px;opacity:.95;display:flex;align-items:flex-start}
.flow-tag{display:inline-block;margin-top:8px;background:#fff;color:var(--primary);border:1px solid var(--line);font-size:12px;border-radius:999px;padding:2px 10px;font-weight:500}
.flow-copy h3{font-size:20px;margin:10px 0 8px}
.flow-copy p{color:var(--text-secondary);font-size:15px;line-height:1.9}
.flow-steps{list-style:none;margin:16px 0 0;padding:0}
.flow-steps li{display:flex;gap:12px;position:relative;padding:0 0 16px 4px;font-size:14px;color:var(--text-secondary);line-height:1.9}
.flow-steps li:last-child{padding-bottom:0}
.flow-steps li .step-badge{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--primary);color:#fff;font-size:11px;font-weight:600;display:flex;align-items:center;justify-content:center;margin-top:5px}
.checklist-section{background:var(--bg-soft);padding:82px 0}
.checklist-section .section-head h2{font-size:28px}
.checklist-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:30px;align-items:center}
.checklist-card{grid-column:span 7;background:#fff;border:1px solid var(--border-light);border-radius:24px;padding:34px 36px;box-shadow:var(--shadow-card)}
.checklist-card h3{font-size:18px;margin-bottom:20px}
.checklist-items{list-style:none;margin:0;padding:0}
.checklist-items li{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--border-light);align-items:flex-start}
.checklist-items li:last-child{border-bottom:none}
.check-icon{width:24px;height:24px;border-radius:50%;background:var(--primary-soft);color:var(--primary);flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;margin-top:3px}
.checklist-items .item-title{font-weight:600;font-size:15px;color:var(--text-title);line-height:1.6}
.checklist-items p{font-size:14px;color:var(--text-secondary);line-height:1.75}
.checklist-visual{grid-column:span 5}
.browser-mock{border:1px solid var(--line);border-radius:22px;overflow:hidden;background:#fff;box-shadow:var(--shadow-card)}
.browser-mock .mock-head{background:var(--bg-soft);border-bottom:1px solid var(--border-light);height:44px;display:flex;align-items:center;padding:0 16px;gap:8px}
.mock-head i{color:var(--text-muted);font-size:9px}
.mock-body img{max-height:400px;width:100%;object-fit:cover}
.mock-caption{padding:18px 20px;color:var(--text-secondary);font-size:13px;line-height:1.7}
.alert-section{background:#fff;padding:82px 0}
.alert-guide{display:grid;gap:18px;max-width:1120px}
.alert-tip{display:grid;grid-template-columns:66px 1fr;gap:18px;background:var(--bg-page);border:1px solid var(--border-light);border-radius:20px;padding:22px 26px;transition:var(--transition)}
.alert-tip:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.alert-icon{width:50px;height:50px;border-radius:14px;background:#fff7E9;color:var(--warning);display:flex;align-items:center;justify-content:center;font-size:18px}
.alert-copy h3{font-size:16px;font-weight:700;margin-bottom:4px}
.alert-copy p{font-size:14px;color:var(--text-secondary);line-height:1.85}
.cta-panel{background:var(--primary);border-radius:28px;padding:56px 40px;color:#fff;text-align:center;position:relative;overflow:hidden}
.cta-panel h2{color:#fff;font-size:28px;font-weight:700;margin:8px 0 14px}
.cta-panel p{color:#dceafc;font-size:16px;line-height:1.9;max-width:620px;margin:0 auto 28px}
.cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.site-footer{background:#0F1E2D;color:#A7B8C7;padding:64px 0 0}
.footer-main{display:grid;grid-template-columns:2.1fr 1.1fr 1.2fr 1fr;gap:36px;padding-bottom:38px}
.footer-brand .brand{color:#fff;margin-bottom:16px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{font-size:14px;line-height:2;margin:16px 0 20px;max-width:360px;color:#9cb0c0}
.social-row{display:flex;gap:10px}
.social-btn{width:36px;height:36px;border-radius:10px;background:rgba(255,255,255,.08);color:#c6d6e3;display:flex;align-items:center;justify-content:center;font-size:14px;cursor:default}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-links a{color:#9cb0c0;font-size:14px;line-height:1.6}
.footer-links a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:#7d95aa}
.footer-legal{display:flex;align-items:center;gap:20px}
.footer-legal a{color:#9cb0c0}
.footer-legal a:hover{color:#fff}
.footer-legal span{color:#768fa3}
@media (max-width:1100px){
  .header-inner{gap:16px}
  .command-search{min-width:130px}
  .hero-layout{grid-template-columns:1.1fr .85fr;gap:32px}
  .header-inner .main-nav{margin-left:auto}
}
@media (min-width:1024px){
  .site-footer .container{max-width:1200px}
}
@media (max-width:1023px){
  .header-inner .main-nav{display:none}
  .mobile-menu{display:block;position:relative}
  .mobile-drop{position:absolute;right:0;top:48px;width:260px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-hover);border-radius:16px;padding:14px;display:flex;flex-direction:column;gap:4px;z-index:1000}
  .mobile-drop a.nav-link.active::after,.mobile-drop a.nav-link::after{display:none}
  .mobile-drop a.nav-link{padding:11px 14px;border-radius:10px;margin:0}
  .mobile-drop .btn{margin-top:10px;justify-content:center}
  details.mobile-menu summary{display:flex}
  details.mobile-menu summary .fa-bars{font-size:18px}
  details[open].mobile-menu summary .fa-bars{transform:rotate(90deg);transition:transform .2s}
  .mobile-menu summary{list-style:none}
  .mobile-menu summary::-webkit-details-marker{display:none}
  .command-search{display:none}
  .quick-link{display:none}
  .footer-main{grid-template-columns:1.2fr 1fr 1fr;row-gap:32px}
  .footer-brand p{max-width:100%}
}
@media (max-width:900px){
  .hero-layout{grid-template-columns:1fr;gap:30px}
  .hero-copy h1{font-size:26px}
  .hero-copy h1 .hero-mark{font-size:24px;margin-top:8px}
  .guide-main{grid-column:span 12}
  .aside-sticky{grid-column:span 12;position:static}
  .security-box p{max-width:620px}
  .checklist-card{grid-column:span 12}
  .checklist-visual{grid-column:span 12}
  .section{padding:70px 0}
  .guide-focus-section,.flow-section,.checklist-section,.alert-section{padding:68px 0}
}
@media (max-width:768px){
  .site-header .header-cta span{display:none}
  .header-cta{padding:8px 12px}
  .section{padding:58px 0}
  .section-head h2,.flow-section .section-head h2{font-size:24px}
  .footer-main{grid-template-columns:1fr;gap:28px}
  .guide-main{padding:28px}
  .flow-card{grid-template-columns:70px 1fr;padding:24px}
  .flow-num{font-size:34px}
  .alert-tip{grid-template-columns:1fr;gap:12px}
  .alert-icon{width:42px;height:42px;font-size:16px}
  .cta-panel{padding:42px 22px}
  .cta-panel h2{font-size:24px}
  .breadcrumb-row{padding:14px 0 0}
}
@media (max-width:640px){
  body{font-size:15px}
  .container{padding:0 16px}
  .header-inner{gap:10px}
  .brand-text{font-size:15px}
  .brand-mark{width:36px;height:36px;font-size:17px;border-radius:12px}
  .hero-copy h1,.hero-copy h1 .hero-mark{font-size:21px}
  .hero-desc{font-size:15px;line-height:1.85}
  .hero-actions .btn{width:100%;justify-content:center}
  .browser-pic img{height:220px}
  .section-head h2,.flow-section .section-head h2{font-size:23px}
  .flow-card{grid-template-columns:1fr;padding:22px}
  .flow-num{font-size:28px}
  .checklist-card{padding:24px 20px}
  .guide-main{padding:24px 20px}
  .section-head p{font-size:15px}
  .footer-bottom{flex-direction:column;text-align:center}
  .footer-legal{gap:12px;flex-wrap:wrap;justify-content:center}
  .mobile-drop{width:calc(100vw - 32px);right:-10px}
  .footer-bottom{justify-content:center}
  .flow-steps li{font-size:14px}
  .flow-copy h3{font-size:19px}
  .browser-mock .mock-body img{max-height:260px}
}

/* roulang page: category2 */
:root {
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --primary-light: #EFF4FF;
  --primary-lighter: #F7FAFF;
  --secondary: #4B6A8C;
  --line: #DCE6F2;
  --bg: #F7FAFC;
  --card: #FFFFFF;
  --accent: #F59E0B;
  --text: #152A3A;
  --text-sub: #57708A;
  --text-weak: #98A9B8;
  --success: #10B981;
  --danger: #EF4444;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --shadow: 0 4px 20px rgba(21,42,58,0.06);
  --shadow-hover: 0 18px 36px -18px rgba(21,42,58,0.22);
  --container: 1200px;
  --header-h: 64px;
  --space-block: 96px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button, input { font-family: inherit; font-size: inherit; }
ul { list-style: none; }
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.block { padding: var(--space-block) 0; }
.section-header {
  max-width: 760px;
  margin-bottom: 42px;
}
.section-header.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.02em;
  margin-bottom: 10px;
}
.section-title {
  font-size: 30px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}
.section-desc {
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.9;
}
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  height: 46px;
  padding: 0 24px;
  font-size: 15px;
  transition: all .2s ease;
}
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.btn i { font-size: 14px; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 14px -6px rgba(37,99,235,0.4); }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: 0 10px 22px -8px rgba(37,99,235,0.5); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { background: #fff; border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); border-color: var(--primary-hover); color: var(--primary-hover); transform: translateY(-1px); }
.btn-white { background: #fff; color: var(--primary); border-color: #fff; }
.btn-white:hover { background: #EFF4FF; border-color: #EFF4FF; transform: translateY(-1px); }
.btn-sm { height: 32px; padding: 0 14px; font-size: 14px; }
.btn-lg { height: 50px; padding: 0 30px; font-size: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid rgba(220,230,242,.7);
  box-shadow: 0 1px 12px rgba(21,42,58,0.03);
  backdrop-filter: blur(6px);
}
.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 19px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 12px -6px rgba(37,99,235,.5);
}
.brand-text {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--text);
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 26px;
  flex: 1;
}
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  padding: 18px 0 16px;
  line-height: 1.2;
  transition: color .2s ease;
  white-space: nowrap;
}
.nav-link:hover { color: var(--primary); }
.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px 2px 0 0;
}
.nav-link:focus-visible { outline: 2px solid var(--primary); outline-offset: 4px; border-radius: 6px; }
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.command-search {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 12px;
  background: var(--primary-light);
  border-radius: 999px;
  color: var(--text-weak);
  font-size: 14px;
  width: 210px;
  transition: box-shadow .2s, background .2s;
  cursor: text;
}
.command-search i { color: var(--secondary); font-size: 13px; }
.command-search span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--text-weak); }
.command-search .kbd {
  margin-left: auto;
  line-height: 1;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 3px 6px;
  color: var(--text-weak);
  font-size: 12px;
}
.command-search:focus-within { box-shadow: 0 0 0 3px rgba(37,99,235,.15); background: #fff; }
.quick-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 38px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text-sub);
  font-size: 14px;
  transition: all .2s ease;
}
.quick-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.header-cta { height: 38px; padding: 0 18px; font-size: 14px; border-radius: var(--radius-sm); }
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  transition: border-color .2s;
}
.menu-toggle:hover { border-color: var(--primary); color: var(--primary); }

.page-breadcrumb {
  padding: 18px 0 0;
  font-size: 14px;
  color: var(--text-weak);
}
.page-breadcrumb a { color: var(--text-sub); transition: color .2s; }
.page-breadcrumb a:hover { color: var(--primary); }
.page-breadcrumb i { font-style: normal; margin: 0 9px; color: var(--line); }
.page-breadcrumb span { color: var(--text-sub); }

.page-hero {
  position: relative;
  background: var(--primary-lighter);
  border-bottom: 1px solid var(--line);
  padding: 62px 0 52px;
  overflow: hidden;
}
.page-hero .hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: 48px;
  align-items: center;
}
.hero-copy h1 {
  font-size: 40px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 18px;
}
.hero-lead {
  font-size: 17px;
  color: var(--text-sub);
  line-height: 1.9;
  max-width: 540px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}
.hero-visual {
  position: relative;
}
.watch-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.watch-top {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 16px;
  background: #FBFCFE;
  border-bottom: 1px solid var(--line);
  color: var(--secondary);
  font-size: 13px;
  font-weight: 500;
}
.watch-top i { font-size: 14px; color: var(--primary); }
.watch-top span:nth-child(2) { margin-right: auto; }
.watch-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(245,158,11,.12);
}
.watch-body img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 34px;
  margin-top: 22px;
  align-items: center;
  color: var(--text-weak);
  font-size: 13px;
}
.hero-trust i { color: var(--primary); margin-right: 6px; }

.top-story-block { padding-top: 70px; }
.top-story {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow .3s, transform .3s;
}
.top-story:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.story-media {
  position: relative;
  min-height: 290px;
}
.story-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.story-media .story-pin {
  position: absolute;
  top: 18px;
  left: 18px;
  background: rgba(255,255,255,.92);
  color: var(--primary);
  border: 1px solid rgba(37,99,235,.18);
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}
.story-body { padding: 34px 36px; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; }
.badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.story-date { color: var(--text-weak); font-size: 13px; margin-bottom: 10px; display: flex; align-items: center; gap: 6px; }
.story-body h2 { font-size: 26px; line-height: 1.4; font-weight: 700; margin-bottom: 12px; }
.story-body p { color: var(--text-sub); font-size: 15px; line-height: 1.9; margin-bottom: 20px; }

.update-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 350px;
  gap: 28px;
  align-items: start;
}
.updates-panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 6px 26px;
}
.update-item {
  display: flex;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid #EEF3F9;
  align-items: center;
  transition: background .2s;
}
.update-item:last-child { border-bottom: none; }
.update-thumb {
  width: 146px;
  height: 98px;
  border-radius: 12px;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--primary-light);
}
.update-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.update-item:hover .update-thumb img { transform: scale(1.04); }
.update-main { min-width: 0; flex: 1; }
.update-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
  font-size: 13px;
  color: var(--text-weak);
}
.update-meta .badge { margin-bottom: 0; }
.update-main h3 {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 5px;
  color: var(--text);
  transition: color .2s;
}
.update-item:hover .update-main h3 { color: var(--primary); }
.update-main p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.75;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.time-text { white-space: nowrap; }
.update-aside { display: grid; gap: 18px; }
.side-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 24px;
}
.side-card .side-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 12px;
}
.side-title i {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}
.side-card p { color: var(--text-sub); font-size: 14px; line-height: 1.85; }
.side-divider { height: 1px; background: var(--line); margin: 18px 0; }
.reference-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.reference-tags span {
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 999px;
  font-weight: 500;
}
.recap-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.8;
  margin-top: 6px;
}
.recap-row i { color: var(--success); padding-top: 5px; font-size: 14px; }

.timeline-block {
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.timeline {
  max-width: 880px;
  margin: 0 auto;
  position: relative;
  padding-left: 34px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 12px;
  bottom: 16px;
  width: 1px;
  background: var(--line);
}
.timeline-item { position: relative; margin-bottom: 30px; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot {
  position: absolute;
  left: -30px;
  top: 9px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 5px solid var(--primary);
  box-shadow: 0 0 0 4px rgba(37,99,235,.12);
}
.tl-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  transition: box-shadow .3s, transform .3s, border-color .3s;
}
.tl-card:hover { border-color: rgba(37,99,235,.35); box-shadow: var(--shadow); transform: translateY(-2px); }
.tl-time {
  font-size: 13px;
  color: var(--primary);
  font-weight: 700;
  letter-spacing: .02em;
  margin-bottom: 6px;
  display: inline-block;
  background: var(--primary-light);
  padding: 2px 10px;
  border-radius: 999px;
}
.tl-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.tl-card p { color: var(--text-sub); font-size: 15px; line-height: 1.85; }

.faq-block { background: var(--bg); }
.faq-wrap { max-width: 880px; margin: 0 auto; }
.faq-list {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.faq-item { border-bottom: 1px solid #EEF3F9; }
.faq-item:last-child { border-bottom: none; }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  background: #fff;
  border: none;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: background .2s;
}
.faq-question:hover { background: var(--primary-lighter); }
.faq-icon {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary);
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  transition: transform .3s;
}
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.9;
}

.cta-block { padding-bottom: 80px; }
.cta-strip {
  background: var(--primary);
  border-radius: 24px;
  color: #fff;
  text-align: center;
  padding: 54px 36px 52px;
  position: relative;
  overflow: hidden;
}
.cta-strip::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  right: -40px;
  top: -60px;
  background: rgba(255,255,255,.08);
}
.cta-strip h2 { font-size: 28px; font-weight: 700; line-height: 1.4; margin-bottom: 10px; position: relative; z-index: 1; }
.cta-strip p { font-size: 16px; line-height: 1.8; color: rgba(255,255,255,.88); max-width: 680px; margin: 0 auto 24px; position: relative; z-index: 1; }
.cta-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; position: relative; z-index: 1; }

.site-footer { background: #0F2132; color: #9FB6C8; padding: 52px 0 26px; }
.site-footer .brand-text { color: #fff; }
.site-footer .footer-main {
  display: grid;
  grid-template-columns: 1.6fr .9fr .9fr .9fr;
  gap: 40px;
  padding-bottom: 38px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand p { color: #7F9BB1; font-size: 14px; line-height: 1.9; margin: 16px 0 18px; max-width: 360px; }
.social-row { display: flex; gap: 10px; }
.social-btn {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,.12);
  background: transparent;
  color: #9FB6C8;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all .2s;
}
.social-btn:hover { background: rgba(255,255,255,.1); color: #fff; border-color: rgba(255,255,255,.2); }
.footer-title { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 18px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 14px; color: #7F9BB1; transition: color .2s; }
.footer-links a:hover { color: #fff; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: #607D91;
  padding-top: 24px;
}
.footer-bottom a { color: #8DA6B8; }
.footer-bottom a:hover { color: #fff; }
.footer-legal { display: flex; align-items: center; gap: 16px; font-size: 13px; }

.float-cta {
  position: fixed;
  right: 30px;
  bottom: 30px;
  z-index: 60;
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  box-shadow: 0 14px 28px -8px rgba(37,99,235,.45);
  padding: 13px 22px;
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all .3s ease;
}
.float-cta.show { opacity: 1; visibility: visible; transform: translateY(0); }
.float-cta:hover { background: var(--primary-hover); transform: translateY(-2px); }

@media (min-width: 1024px) {
  .main-nav { display: flex !important; }
}
@media (max-width: 1023px) {
  :root { --space-block: 72px; }
  .main-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 14px 24px 20px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    box-shadow: 0 18px 30px rgba(21,42,58,.08);
    z-index: 99;
  }
  .header-inner.menu-open .main-nav { display: flex; }
  .nav-link { padding: 12px 14px; border-radius: 10px; }
  .nav-link:hover { background: var(--primary-light); }
  .nav-link.active::after { display: none; }
  .nav-link.active { background: var(--primary-light); }
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .quick-btn span { display: none; }
  .quick-btn { width: 38px; padding: 0; justify-content: center; }
  .command-search { width: 170px; }
  .page-hero { padding-top: 46px; padding-bottom: 38px; }
  .page-hero .hero-grid { grid-template-columns: 1fr; gap: 30px; }
  .update-layout { grid-template-columns: 1fr; }
  .side-card { max-width: none; }
  .footer-main { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  :root { --space-block: 56px; }
  .container { padding-left: 16px; padding-right: 16px; }
  .section-title { font-size: 24px; }
  .brand-text { font-size: 15px; }
  .brand-mark { width: 32px; height: 32px; font-size: 17px; border-radius: 9px; }
  .header-actions { gap: 6px; }
  .command-search { width: 42px; padding: 0; justify-content: center; }
  .command-search span { display: none; }
  .command-search .kbd { display: none; }
  .command-search i { margin: 0; }
  .header-cta { display: none; }
  .quick-btn { display: none; }
  .menu-toggle { display: inline-flex; }
  .page-hero h1 { font-size: 29px; }
  .hero-lead { font-size: 15px; }
  .hero-actions .btn { width: 100%; padding: 0; }
  .story-media { min-height: 210px; position: relative; }
  .story-media img { position: absolute; width: 100%; height: 100%; }
  .top-story { grid-template-columns: 1fr; }
  .story-body { padding: 24px; }
  .story-body h2 { font-size: 21px; }
  .headline-card { display: block !important; }
  .update-section .section-header { margin-bottom: 24px; }
  .updates-panel { padding: 4px 14px; }
  .update-item { display: block; }
  .update-thumb { width: 100%; height: 106px; margin-bottom: 12px; }
  .update-main h3 { font-size: 16px; }
  .update-meta { flex-wrap: wrap; }
  .time-text { margin-left: auto; }
  .side-card { padding: 20px 18px; }
  .timeline { padding-left: 24px; }
  .faq-question { padding: 18px 16px; font-size: 15px; }
  .faq-answer-inner { padding: 0 16px 20px; }
  .cta-strip { padding: 40px 20px 38px; border-radius: 18px; }
  .cta-strip h2 { font-size: 22px; }
  .cta-actions .btn { width: 100%; padding: 0 16px; }
  .site-footer { padding-top: 40px; }
  .footer-main { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .float-cta { right: 16px; bottom: 16px; left: 16px; justify-content: center; border-radius: 14px; }
}
@media (max-width: 520px) {
  .section-title { font-size: 22px; }
  .hero-trust { gap: 16px; }
  .hero-trust span { width: 44%; }
}

/* roulang page: category3 */
:root{
  --primary:#2563EB;
  --primary-hover:#1D4ED8;
  --primary-soft:#EFF4FF;
  --accent:#F59E0B;
  --ash:#4B6A8C;
  --line:#DCE6F2;
  --bg:#F7FAFC;
  --card:#FFFFFF;
  --text:#152A3A;
  --text-2:#57708A;
  --muted:#98A9B8;
  --success:#10B981;
  --danger:#EF4444;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-input:12px;
  --shadow-card:0 4px 20px rgba(21,42,58,0.06);
  --shadow-hover:0 18px 36px -18px rgba(21,42,58,0.22);
  --font-stack:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Helvetica Neue",Arial,sans-serif;
  --header-height:64px;
}
*,*::before,*::after{
  box-sizing:border-box;
}
html{
  scroll-behavior:smooth;
}
body{
  margin:0;
  font-family:var(--font-stack);
  font-size:16px;
  line-height:1.9;
  background:var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
}
img{
  max-width:100%;
  display:block;
  border:0;
}
a{
  color:var(--primary);
  text-decoration:none;
  transition:color .25s ease,background .25s ease,border-color .25s ease,box-shadow .25s ease,transform .25s ease;
}
a:hover{
  color:var(--primary-hover);
}
button{
  font-family:inherit;
  cursor:pointer;
  border:0;
  background:none;
}
ul,ol{
  margin:0;
  padding:0;
}
li{
  list-style:none;
}
p{
  margin:0 0 20px;
}
h1,h2,h3,h4{
  margin:0 0 16px;
  line-height:1.3;
  font-weight:700;
  color:var(--text);
}
h1{
  font-size:42px;
}
h2{
  font-size:30px;
}
h3{
  font-size:20px;
}
h4{
  font-size:18px;
}
section{
  scroll-margin-top:90px;
}
i{
  font-style:normal;
}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
@media (max-width:640px){
  h1{font-size:28px;}
  h2{font-size:24px;}
  .container{padding:0 20px;}
}

.site-header{
  position:sticky;
  top:0;
  height:var(--header-height);
  background:rgba(255,255,255,.96);
  border-bottom:1px solid transparent;
  transition:box-shadow .3s ease,border-color .3s ease;
  z-index:80;
}
.site-header.scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 4px 16px rgba(21,42,58,.04);
}
.site-header .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:var(--header-height);
  gap:28px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text);
  flex-shrink:0;
}
.brand:hover{
  color:var(--text);
}
.brand-mark{
  width:34px;
  height:34px;
  border-radius:9px;
  background:var(--primary);
  color:#fff;
  font-size:18px;
  font-weight:700;
  display:inline-flex;
  align-items:center;
  justify-content:center;
}
.brand-text{
  font-size:18px;
  font-weight:700;
  color:var(--text);
  white-space:nowrap;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:28px;
  margin-left:16px;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  color:var(--text-2);
  font-weight:500;
  padding:18px 2px;
  font-size:15px;
}
.nav-link:hover{
  color:var(--primary);
}
.nav-link.active{
  color:var(--primary);
  font-weight:600;
}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:2px;
  border-radius:2px;
  background:var(--primary);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:auto;
  flex-shrink:0;
}
.search-wrap{
  display:flex;
  align-items:center;
  background:var(--primary-soft);
  border:1px solid transparent;
  border-radius:999px;
  height:38px;
  padding:0 8px 0 14px;
  width:220px;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.search-wrap:focus-within{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(37,99,235,.12);
}
.search-wrap .fa-magnifying-glass{
  color:var(--muted);
  font-size:13px;
}
.search-wrap input{
  border:0;
  background:transparent;
  font-family:inherit;
  font-size:13px;
  color:var(--text);
  padding:0 6px;
  flex:1;
  min-width:0;
  outline:none;
}
.search-wrap input::placeholder{
  color:var(--muted);
}
.search-kbd{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:11px;
  background:#fff;
  color:var(--ash);
  border:1px solid var(--line);
  border-radius:6px;
  padding:1px 6px;
  line-height:1.5;
  font-family:inherit;
  user-select:none;
}
.search-icon-btn{
  display:none;
  align-items:center;
  justify-content:center;
  width:38px;
  height:38px;
  border-radius:50%;
  color:var(--muted);
  border:1px solid var(--line);
  background:#fff;
}
.search-icon-btn:hover{
  color:var(--primary);
  border-color:var(--primary);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-family:inherit;
  border-radius:var(--radius-btn);
  font-weight:600;
  height:38px;
  padding:0 20px;
  font-size:14px;
  line-height:1;
  transition:transform .2s ease,background .2s ease,border-color .2s ease,color .2s ease,box-shadow .2s ease;
}
.btn-primary{
  background:var(--primary);
  color:#fff;
  border:1px solid var(--primary);
}
.btn-primary:hover{
  background:var(--primary-hover);
  border-color:var(--primary-hover);
  color:#fff;
  transform:translateY(-2px);
  box-shadow:var(--shadow-hover);
}
.btn-secondary{
  background:#fff;
  color:var(--primary);
  border:1px solid var(--primary);
}
.btn-secondary:hover{
  background:var(--primary-soft);
  color:var(--primary);
  transform:translateY(-1px);
}
.btn-light{
  background:#fff;
  color:var(--primary);
  border:1px solid #fff;
}
.btn-light:hover{
  background:#D9E4FF;
  border-color:#D9E4FF;
  color:var(--primary-hover);
  transform:translateY(-2px);
  box-shadow:0 12px 24px -12px rgba(255,255,255,.5);
}
.btn-outline-light{
  background:transparent;
  color:#fff;
  border:1px solid rgba(255,255,255,.6);
}
.btn-outline-light:hover{
  background:rgba(255,255,255,.12);
  color:#fff;
  border-color:#fff;
}
.nav-toggle{
  display:none;
  width:40px;
  height:40px;
  border-radius:8px;
  border:1px solid var(--line);
  background:#fff;
  color:var(--text);
  font-size:17px;
  align-items:center;
  justify-content:center;
}
.nav-toggle:hover{
  border-color:var(--primary);
  color:var(--primary);
}

.cat-hero{
  background:var(--primary-soft);
  padding:64px 0 72px;
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  font-size:13px;
  color:var(--ash);
  margin-bottom:26px;
  gap:8px;
}
.breadcrumb a{
  color:var(--primary);
}
.breadcrumb a:hover{
  text-decoration:underline;
}
.breadcrumb i{
  color:var(--muted);
  margin:0 2px;
}
.cat-hero-inner{
  max-width:860px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  font-size:13px;
  font-weight:600;
  color:var(--primary);
  letter-spacing:.4px;
  margin-bottom:10px;
}
.cat-hero-inner h1{
  font-size:42px;
  line-height:1.25;
  margin-bottom:18px;
}
.hero-lead{
  font-size:17px;
  color:var(--text-2);
  max-width:760px;
  line-height:1.9;
}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:18px;
  margin-top:22px;
  color:var(--ash);
  font-size:14px;
}
.hero-meta span{
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.hero-meta .fa-regular,.hero-meta .fa-solid{
  color:var(--primary);
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:22px;
}
.tag{
  display:inline-flex;
  align-items:center;
  padding:6px 14px;
  border-radius:999px;
  background:#fff;
  color:var(--ash);
  font-size:13px;
  border:1px solid var(--line);
  line-height:1.6;
}
.tag-primary{
  background:var(--primary-soft);
  color:var(--primary);
  border-color:transparent;
  font-weight:500;
}

.entry-context{
  padding:96px 0 48px;
}
.context-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) 376px;
  gap:32px;
  align-items:start;
}
.context-main{
  background:var(--card);
  border-radius:var(--radius-card);
  padding:32px;
  box-shadow:var(--shadow-card);
}
.context-main .eyebrow{
  margin-bottom:6px;
}
.context-main h2{
  font-size:28px;
  margin-bottom:14px;
}
.context-main > p{
  color:var(--text-2);
  font-size:16px;
  margin-bottom:26px;
}
.mini-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
  margin-bottom:32px;
}
.mini-item{
  background:var(--bg);
  border:1px solid var(--line);
  border-radius:14px;
  padding:20px;
}
.mini-item:first-child{
  grid-column:span 2;
}
.mini-icon{
  width:42px;
  height:42px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:12px;
  background:var(--primary-soft);
  color:var(--primary);
  font-size:16px;
  margin-bottom:14px;
}
.mini-item h4{
  font-size:17px;
  margin-bottom:6px;
}
.mini-item p{
  margin:0;
  font-size:14px;
  color:var(--text-2);
  line-height:1.8;
}
.entry-window{
  border:1px solid var(--line);
  border-radius:16px;
  background:#fff;
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
.window-bar{
  display:flex;
  align-items:center;
  gap:7px;
  padding:10px 14px;
  background:#F3F6FB;
  border-bottom:1px solid var(--line);
}
.window-dot{
  width:10px;
  height:10px;
  border-radius:50%;
  background:#DCE6F2;
}
.window-dot:first-child{
  background:#FF9C9C;
}
.window-dot:nth-child(2){
  background:#FFD98C;
}
.window-dot:nth-child(3){
  background:#B5E6C0;
}
.entry-window img{
  width:100%;
  height:auto;
  object-fit:cover;
  border-bottom-left-radius:16px;
  border-bottom-right-radius:16px;
}
.entry-window figcaption{
  padding:10px 16px;
  font-size:13px;
  color:var(--muted);
}
.safety-card{
  background:var(--primary-soft);
  border:1px solid rgba(37,99,235,.08);
  border-radius:var(--radius-card);
  padding:26px 24px;
  position:sticky;
  top:88px;
}
.security-head{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:6px;
}
.security-head .fa-solid{
  width:36px;
  height:36px;
  border-radius:10px;
  background:#fff;
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:15px;
}
.safety-card h3{
  font-size:18px;
  margin:0;
}
.safety-card > p{
  font-size:14px;
  color:var(--text-2);
  margin-top:14px;
}
.safety-list{
  margin-top:18px;
  display:flex;
  flex-direction:column;
  gap:12px;
}
.safety-list li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:14px;
  line-height:1.7;
  color:var(--text);
}
.safety-list li i{
  color:var(--accent);
  margin-top:7px;
  font-size:13px;
}

.section-card-space{
  padding:48px 0 96px;
}
.step-panel{
  background:var(--card);
  border-radius:var(--radius-card);
  padding:34px;
  box-shadow:var(--shadow-card);
}
.step-panel .eyebrow{
  margin-bottom:4px;
}
.step-panel h2{
  margin-bottom:10px;
}
.step-panel > .section-desc{
  color:var(--text-2);
  margin-bottom:40px;
  max-width:720px;
}
.step-duo{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.step-card{
  background:var(--bg);
  border:1px solid var(--line);
  border-radius:16px;
  padding:30px;
  position:relative;
  overflow:hidden;
}
.step-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-hover);
}
.step-number{
  font-size:42px;
  font-weight:700;
  color:var(--primary);
  line-height:1;
  margin-bottom:16px;
  display:block;
}
.step-card h3{
  font-size:20px;
  margin-bottom:8px;
}
.step-card > p{
  color:var(--text-2);
  font-size:14px;
  margin-bottom:20px;
}
.step-list{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.step-list li{
  display:flex;
  gap:12px;
  font-size:15px;
  color:var(--text);
}
.step-list .step-index{
  color:var(--primary);
  font-weight:700;
  min-width:22px;
  font-size:15px;
}
.step-list .step-divider{
  display:block;
  height:1px;
  background:var(--line);
  margin:2px 0;
  width:100%;
}

.checklist-section{
  background:#fff;
  padding:96px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.checklist-header{
  max-width:720px;
  margin-bottom:42px;
}
.checklist-header .eyebrow{
  margin-bottom:6px;
}
.checklist-header h2{
  margin-bottom:12px;
}
.checklist-header p{
  color:var(--text-2);
  margin:0;
}
.check-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
}
.check-item{
  display:flex;
  gap:16px;
  background:var(--bg);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.check-item:hover{
  box-shadow:var(--shadow-hover);
  border-color:rgba(37,99,235,.25);
  transform:translateY(-2px);
}
.check-icon{
  width:34px;
  height:34px;
  border-radius:10px;
  background:var(--primary-soft);
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  font-size:14px;
}
.check-item h4{
  font-size:17px;
  margin-bottom:4px;
}
.check-item p{
  font-size:14px;
  color:var(--text-2);
  margin:0;
  line-height:1.7;
}

.notice-section{
  padding:96px 0;
}
.notice-panel{
  max-width:900px;
  margin:0 auto;
}
.notice-panel .eyebrow{
  margin-bottom:6px;
}
.notice-panel h2{
  margin-bottom:12px;
}
.notice-panel > p{
  color:var(--text-2);
  margin-bottom:36px;
}
.notice-list{
  display:flex;
  flex-direction:column;
  gap:14px;
}
.alert-item{
  display:flex;
  gap:18px;
  padding:22px 22px;
  background:#fff;
  border:1px solid var(--line);
  border-left:4px solid var(--accent);
  border-radius:12px;
  box-shadow:var(--shadow-card);
  transition:box-shadow .25s ease,transform .25s ease;
}
.alert-item:hover{
  transform:translateX(4px);
  box-shadow:var(--shadow-hover);
}
.alert-tag{
  width:34px;
  height:34px;
  border-radius:10px;
  background:#FFF7E6;
  color:var(--accent);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  font-size:14px;
}
.alert-content h4{
  font-size:16px;
  margin-bottom:4px;
}
.alert-content p{
  font-size:14px;
  color:var(--text-2);
  margin:0;
  line-height:1.8;
}

.cta-mini-section{
  padding-bottom:96px;
}
.cta-panel{
  background:var(--primary);
  border-radius:24px;
  padding:64px 56px;
  text-align:center;
  color:#fff;
}
.cta-panel h2{
  color:#fff;
  font-size:30px;
  margin-bottom:14px;
}
.cta-panel p{
  color:rgba(255,255,255,.82);
  font-size:16px;
  max-width:620px;
  margin:0 auto 32px;
  line-height:1.8;
}
.cta-buttons{
  display:flex;
  justify-content:center;
  gap:16px;
  flex-wrap:wrap;
}
.cta-panel .btn-light{
  min-width:150px;
}
.cta-panel .btn-outline-light{
  min-width:150px;
}

.site-footer{
  background:#F1F5FB;
  border-top:1px solid var(--line);
  padding-top:68px;
  color:var(--text-2);
}
.footer-main{
  display:grid;
  grid-template-columns:minmax(0,2fr) 1fr 1fr 1fr;
  gap:44px;
  padding-bottom:44px;
}
.site-footer .brand{
  margin-bottom:16px;
}
.site-footer .brand-text{
  font-size:17px;
}
.footer-main p{
  font-size:14px;
  line-height:1.9;
  color:var(--text-2);
  margin-bottom:22px;
  max-width:320px;
}
.social-row{
  display:flex;
  gap:10px;
}
.social-btn{
  width:38px;
  height:38px;
  border-radius:50%;
  background:#fff;
  border:1px solid var(--line);
  color:var(--ash);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:color .25s ease,transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.social-btn:hover{
  color:var(--primary);
  border-color:var(--primary);
  transform:translateY(-2px);
  box-shadow:var(--shadow-card);
}
.footer-title{
  font-size:15px;
  font-weight:700;
  color:var(--text);
  margin-bottom:18px;
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:11px;
}
.footer-links a,.footer-links span{
  color:var(--text-2);
  font-size:14px;
  display:inline-block;
}
.footer-links a:hover{
  color:var(--primary);
}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  gap:16px;
  border-top:1px solid var(--line);
  padding:16px 0;
  font-size:13px;
  color:var(--muted);
}
.footer-legal{
  display:flex;
  align-items:center;
  gap:16px;
}
.footer-legal a{
  color:var(--muted);
}
.footer-legal a:hover{
  color:var(--primary);
}

a:focus-visible,button:focus-visible,.social-btn:focus-visible,.tag:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
  border-radius:6px;
}
.btn:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:3px;
}

@media (max-width:1024px){
  .search-wrap{
    width:170px;
  }
  .main-nav{
    gap:16px;
    margin-left:4px;
  }
  .site-header .container{
    gap:14px;
  }
  .brand-text{
    font-size:15px;
  }
  .context-grid{
    grid-template-columns:minmax(0,1fr) 320px;
    gap:24px;
  }
  .footer-main{
    grid-template-columns:1fr 1fr;
  }
}

@media (max-width:768px){
  .site-header .container{
    justify-content:space-between;
    gap:12px;
  }
  .main-nav{
    position:fixed;
    top:var(--header-height);
    left:0;
    right:0;
    background:#fff;
    flex-direction:column;
    align-items:flex-start;
    padding:18px 24px 28px;
    margin:0;
    gap:4px;
    border-bottom:1px solid var(--line);
    box-shadow:0 16px 30px rgba(21,42,58,.08);
    display:none;
  }
  .site-header.nav-open .main-nav{
    display:flex;
  }
  .main-nav a{
    width:100%;
    padding:11px 0;
    font-size:16px;
    border-bottom:1px solid var(--line);
  }
  .main-nav a:last-child{
    border-bottom:0;
  }
  .main-nav a.active::after{
    display:none;
  }
  .search-wrap{
    display:none;
  }
  .search-icon-btn{
    display:inline-flex;
  }
  .nav-toggle{
    display:inline-flex;
  }
  .header-actions .btn{
    display:none;
  }
  .header-actions{
    gap:6px;
  }
  .cat-hero{
    padding:44px 0 56px;
  }
  .cat-hero-inner h1{
    font-size:28px;
  }
  .hero-lead{
    font-size:15px;
  }
  .entry-context{
    padding:56px 0 40px;
  }
  .context-grid{
    grid-template-columns:1fr;
  }
  .safety-card{
    position:static;
  }
  .section-card-space{
    padding:40px 0 56px;
  }
  .step-panel{
    padding:26px 20px;
  }
  .step-duo{
    grid-template-columns:1fr;
  }
  .checklist-section{
    padding:56px 0;
  }
  .check-grid{
    grid-template-columns:1fr;
  }
  .notice-section{
    padding:56px 0;
  }
  .alert-item{
    flex-direction:column;
    gap:10px;
    padding:20px;
  }
  .alert-item:hover{
    transform:none;
  }
  .cta-mini-section{
    padding-bottom:58px;
  }
  .cta-panel{
    padding:44px 22px;
    border-radius:16px;
  }
  .cta-panel h2{
    font-size:24px;
  }
  .context-main{
    padding:24px 20px;
  }
  .mini-grid{
    grid-template-columns:1fr;
  }
  .mini-item:first-child{
    grid-column:auto;
  }
  .footer-main{
    grid-template-columns:1fr;
    gap:30px;
    padding-bottom:30px;
  }
  .footer-bottom{
    flex-direction:column;
    justify-content:flex-start;
  }
}

@media (max-width:520px){
  .cat-hero-inner h1{
    font-size:26px;
  }
  .brand-text{
    white-space:normal;
    max-width:130px;
    line-height:1.3;
  }
  .step-panel h2{
    font-size:22px;
  }
  .step-card{
    padding:24px 18px;
  }
  .hero-meta{
    gap:10px;
    flex-direction:column;
    align-items:flex-start;
  }
  .check-item{
    flex-direction:column;
    gap:12px;
  }
}