/* roulang page: index */
:root{
  --primary:#2E8B9E;
  --primary-dark:#1C5E6E;
  --primary-light:#E3F0F2;
  --accent:#F5A623;
  --accent-dark:#C77E14;
  --bg-body:#F7FAFB;
  --bg-card:#FFFFFF;
  --text-main:#253338;
  --text-secondary:#5C6F75;
  --text-caption:#8A9BA1;
  --border:#E4ECEE;
  --shadow-card:0 4px 20px rgba(37,51,56,.06);
  --shadow-hover:0 8px 30px rgba(37,51,56,.10);
  --radius:8px;
  --radius-pill:999px;
  --font-main:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-main);
  background:var(--bg-body);
  color:var(--text-main);
  line-height:1.7;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto}
button:focus, a:focus, input:focus{outline:none}
a:focus-visible, button:focus-visible, input:focus-visible{
  outline:3px solid rgba(46,139,158,.35);
  outline-offset:2px;
  border-radius:4px;
}
.container{max-width:1200px;padding-left:20px;padding-right:20px}

/* ========== Header ========== */
.site-header{
  position:sticky;
  top:0;
  z-index:1050;
  background:rgba(255,255,255,.98);
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s ease;
}
.site-header.scrolled{
  box-shadow:0 4px 20px rgba(37,51,56,.07);
}
.header-top{
  padding:12px 0;
  border-bottom:1px solid var(--border);
}
.header-top .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.brand-logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-icon{
  width:38px;height:38px;
  border-radius:10px;
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:18px;
  box-shadow:0 4px 12px rgba(46,139,158,.25);
}
.brand-text{
  font-size:20px;
  font-weight:700;
  color:var(--text-main);
  letter-spacing:.5px;
  line-height:1.2;
}
.brand-text small{
  display:block;
  font-size:11px;
  font-weight:400;
  color:var(--text-caption);
  letter-spacing:1px;
}
.header-search{
  flex:0 1 360px;
  margin:0 auto;
  position:relative;
}
.header-search form{position:relative}
.header-search input{
  width:100%;
  height:40px;
  border:1px solid var(--border);
  border-radius:var(--radius-pill);
  padding:0 42px 0 16px;
  font-size:14px;
  background:var(--bg-body);
  transition:border-color .2s, box-shadow .2s;
}
.header-search input:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(46,139,158,.15);
  background:#fff;
}
.header-search button{
  position:absolute;
  right:4px;top:50%;
  transform:translateY(-50%);
  width:32px;height:32px;
  border:none;background:var(--primary);
  color:#fff;border-radius:50%;
  font-size:13px;
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;
  transition:background .2s;
}
.header-search button:hover{background:var(--primary-dark)}
.btn-login{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:38px;
  padding:0 22px;
  border-radius:var(--radius-pill);
  border:1.5px solid var(--primary);
  color:var(--primary);
  font-size:14px;
  font-weight:600;
  background:transparent;
  transition:all .2s ease;
  white-space:nowrap;
}
.btn-login:hover{
  background:var(--primary);
  color:#fff;
  box-shadow:0 4px 14px rgba(46,139,158,.25);
  transform:translateY(-1px);
}
.navbar-toggler-custom{
  display:none;
  width:40px;height:40px;
  border:1px solid var(--border);
  border-radius:8px;
  background:var(--bg-body);
  color:var(--text-main);
  font-size:18px;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:all .2s;
}
.navbar-toggler-custom:hover{
  border-color:var(--primary);
  color:var(--primary);
}
.header-nav{
  background:#fff;
}
.header-nav .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:50px;
}
.nav-main{
  display:flex;
  align-items:center;
  gap:4px;
  list-style:none;
  margin:0;
  padding:0;
}
.nav-main li a{
  display:inline-block;
  padding:8px 18px;
  font-size:15px;
  font-weight:500;
  color:var(--text-main);
  border-radius:6px;
  transition:all .2s ease;
}
.nav-main li a:hover{
  color:var(--primary);
  background:var(--primary-light);
}
.nav-main li.active a{
  color:#fff;
  background:var(--primary);
  box-shadow:0 4px 12px rgba(46,139,158,.25);
}
.hot-tags{
  display:flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  color:var(--text-caption);
}
.hot-tags span{white-space:nowrap}
.hot-tags a{
  color:var(--text-secondary);
  background:var(--bg-body);
  padding:3px 12px;
  border-radius:var(--radius-pill);
  font-size:12px;
  transition:all .2s;
  white-space:nowrap;
}
.hot-tags a:hover{
  color:#fff;
  background:var(--primary);
}
.mobile-menu{
  display:none;
  background:#fff;
  border-top:1px solid var(--border);
  padding:16px 20px 20px;
}
.mobile-menu.show{display:block}
.mobile-menu .nav-main{
  flex-direction:column;
  align-items:stretch;
  gap:6px;
  margin-bottom:14px;
}
.mobile-menu .nav-main li a{
  display:block;
  padding:12px 16px;
  background:var(--bg-body);
  border-radius:8px;
}
.mobile-menu .nav-main li.active a{
  background:var(--primary);
  color:#fff;
}
.mobile-search{
  position:relative;
  margin-bottom:14px;
}
.mobile-search input{
  width:100%;
  height:42px;
  border:1px solid var(--border);
  border-radius:8px;
  padding:0 42px 0 14px;
  font-size:14px;
  background:var(--bg-body);
}
.mobile-search button{
  position:absolute;
  right:4px;top:50%;
  transform:translateY(-50%);
  width:32px;height:32px;
  border:none;border-radius:50%;
  background:var(--primary);color:#fff;
  font-size:13px;
}
.mobile-hot{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.mobile-hot a{
  font-size:12px;
  color:var(--text-secondary);
  background:var(--bg-body);
  padding:4px 12px;
  border-radius:var(--radius-pill);
}

/* ========== Hero ========== */
.hero-section{
  position:relative;
  padding:88px 0 80px;
  background:linear-gradient(135deg, rgba(227,240,242,.96) 0%, rgba(247,250,251,.94) 55%, rgba(255,255,255,.9) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  overflow:hidden;
}
.hero-section::before{
  content:'';
  position:absolute;
  width:420px;height:420px;
  border-radius:50%;
  border:38px solid rgba(46,139,158,.06);
  top:-100px;right:-80px;
  pointer-events:none;
}
.hero-section::after{
  content:'';
  position:absolute;
  width:160px;height:160px;
  border-radius:50%;
  border:18px solid rgba(245,166,35,.08);
  bottom:-30px;left:8%;
  pointer-events:none;
}
.hero-wrap{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:60px;
  align-items:center;
  position:relative;
  z-index:2;
}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(255,255,255,.92);
  border:1px solid rgba(46,139,158,.25);
  color:var(--primary);
  font-size:13px;
  font-weight:600;
  padding:6px 16px;
  border-radius:var(--radius-pill);
  margin-bottom:18px;
  box-shadow:0 2px 10px rgba(46,139,158,.08);
}
.hero-badge i{font-size:12px;color:var(--accent)}
.hero-title{
  font-size:clamp(28px, 4.4vw, 42px);
  font-weight:700;
  line-height:1.3;
  color:var(--text-main);
  margin-bottom:16px;
  letter-spacing:.5px;
}
.hero-title .highlight{
  color:var(--primary);
  position:relative;
}
.hero-desc{
  font-size:16px;
  color:var(--text-secondary);
  line-height:1.8;
  margin-bottom:30px;
  max-width:460px;
}
.hero-desc strong{color:var(--primary-dark);font-weight:600}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}
.btn-download{
  display:inline-flex;
  align-items:center;
  gap:9px;
  height:48px;
  padding:0 28px;
  background:var(--accent);
  color:#fff;
  font-size:15px;
  font-weight:600;
  border:none;
  border-radius:8px;
  box-shadow:0 6px 18px rgba(245,166,35,.32);
  cursor:pointer;
  transition:all .22s ease;
  text-decoration:none;
}
.btn-download:hover{
  background:var(--accent-dark);
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 10px 26px rgba(245,166,35,.38);
}
.btn-download:active{transform:translateY(0) scale(.98)}
.btn-more{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  background:transparent;
  color:var(--primary);
  font-size:15px;
  font-weight:600;
  border:1.5px solid var(--primary);
  border-radius:8px;
  transition:all .22s ease;
  text-decoration:none;
}
.btn-more:hover{
  background:var(--primary-light);
  color:var(--primary-dark);
  transform:translateY(-2px);
}
.hero-visual{
  position:relative;
  display:flex;
  justify-content:center;
  align-items:center;
}
.hero-visual .main-img{
  position:relative;
  z-index:2;
  width:100%;
  max-width:460px;
  border-radius:20px;
  box-shadow:0 20px 60px rgba(37,51,56,.16);
  border:5px solid #fff;
  transform:rotate(1deg);
  transition:transform .4s ease;
}
.hero-visual .main-img:hover{transform:rotate(0deg) scale(1.01)}
.hero-visual::before{
  content:'';
  position:absolute;
  width:80%;padding-bottom:80%;
  background:radial-gradient(circle, rgba(46,139,158,.12) 0%, transparent 65%);
  top:50%;left:50%;
  transform:translate(-50%,-50%);
  border-radius:50%;
}
.float-card{
  position:absolute;
  z-index:3;
  background:rgba(255,255,255,.96);
  border-radius:12px;
  padding:12px 18px;
  box-shadow:var(--shadow-card);
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-secondary);
  backdrop-filter:blur(6px);
  border:1px solid rgba(255,255,255,.6);
}
.float-card i{
  width:32px;height:32px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--primary-light);
  color:var(--primary);
  font-size:14px;
}
.float-card strong{display:block;color:var(--text-main);font-size:14px;font-weight:600}
.float-card.fc-1{top:12%;left:-4%;animation:floatY 4s ease-in-out infinite}
.float-card.fc-2{bottom:12%;right:-2%;animation:floatY 5s ease-in-out .6s infinite}
@keyframes floatY{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-10px)}
}

/* ========== Trust strip ========== */
.trust-strip{
  border-bottom:1px solid var(--border);
  background:#fff;
}
.trust-grid{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:0;
}
.trust-item{
  padding:26px 20px;
  text-align:center;
  border-right:1px solid var(--border);
}
.trust-item:last-child{border-right:none}
.trust-item .num{
  font-size:26px;
  font-weight:700;
  color:var(--primary);
  font-variant-numeric:tabular-nums;
  line-height:1.3;
}
.trust-item .label{
  font-size:13px;
  color:var(--text-caption);
  margin-top:4px;
}
.trust-item .label i{color:var(--accent);margin-right:4px}

/* ========== Section base ========== */
.section{
  padding:100px 0;
}
.section-head{
  text-align:center;
  margin-bottom:52px;
  max-width:680px;
  margin-left:auto;
  margin-right:auto;
}
.section-tag{
  display:inline-block;
  font-size:13px;
  font-weight:500;
  color:var(--primary);
  background:var(--primary-light);
  padding:5px 16px;
  border-radius:var(--radius-pill);
  margin-bottom:14px;
  letter-spacing:.5px;
}
.section-title{
  font-size:clamp(24px, 3vw, 30px);
  font-weight:700;
  color:var(--text-main);
  line-height:1.4;
  margin-bottom:14px;
  position:relative;
  display:inline-block;
  padding-left:16px;
}
.section-title::before{
  content:'';
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:4px;
  height:26px;
  border-radius:2px;
  background:var(--primary);
}
.section-sub{
  color:var(--text-secondary);
  font-size:15px;
  line-height:1.8;
}

/* ========== Features ========== */
.features-section{
  background:var(--bg-body);
}
.feature-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:28px;
}
.feature-card{
  background:var(--bg-card);
  border-radius:12px;
  padding:32px 26px 24px;
  border:1px solid var(--border);
  box-shadow:var(--shadow-card);
  transition:all .25s ease;
  position:relative;
  overflow:hidden;
}
.feature-card::after{
  content:'';
  position:absolute;
  width:80px;height:80px;
  border-radius:50%;
  background:var(--primary-light);
  opacity:.5;
  top:-30px;right:-25px;
}
.feature-card:nth-child(2){
  margin-top:36px;
  background:var(--primary);
  border-color:var(--primary);
}
.feature-card:nth-child(2)::after{background:rgba(255,255,255,.15)}
.feature-card:nth-child(3){
  margin-top:18px;
  border-left:3px solid var(--accent);
}
.feature-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
}
.feature-icon{
  width:58px;height:58px;
  border-radius:14px;
  background:var(--primary-light);
  color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  font-size:24px;
  margin-bottom:18px;
  transition:all .3s ease;
  position:relative;
  z-index:1;
}
.feature-card:nth-child(2) .feature-icon{
  background:rgba(255,255,255,.2);
  color:#fff;
}
.feature-card h3{
  font-size:19px;
  font-weight:600;
  margin-bottom:10px;
  color:var(--text-main);
}
.feature-card:nth-child(2) h3{
  color:#fff;
}
.feature-card p{
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.75;
  margin-bottom:16px;
}
.feature-card:nth-child(2) p{
  color:rgba(255,255,255,.85);
}
.feature-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:500;
  color:var(--primary);
  text-decoration:none;
  transition:gap .2s ease;
  position:relative;
  z-index:1;
}
.feature-card:nth-child(2) .feature-link{color:#fff}
.feature-link:hover{gap:10px;color:var(--accent-dark)}
.feature-card:nth-child(2) .feature-link:hover{color:var(--accent)}

/* ========== Preview carousel ========== */
.preview-section{
  background:#fff;
  position:relative;
}
.preview-section::before{
  content:'';
  position:absolute;
  inset:0;
  background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  opacity:.12;
  pointer-events:none;
}
.preview-carousel{
  max-width:860px;
  margin:0 auto;
  border-radius:16px;
  overflow:hidden;
  box-shadow:0 18px 50px rgba(37,51,56,.14);
  border:6px solid #fff;
}
.carousel-item{position:relative}
.carousel-item img{
  width:100%;
  height:440px;
  object-fit:cover;
}
.carousel-caption-custom{
  position:absolute;
  bottom:0;left:0;right:0;
  padding:46px 30px 26px;
  background:linear-gradient(to top, rgba(37,51,56,.78), transparent);
  color:#fff;
  text-align:left;
}
.carousel-caption-custom h4{
  font-size:18px;
  font-weight:600;
  margin-bottom:4px;
}
.carousel-caption-custom p{
  font-size:13px;
  opacity:.88;
  margin:0;
}
.carousel-indicators{
  position:static;
  margin-top:22px;
  display:flex;
  justify-content:center;
  gap:8px;
}
.carousel-indicators [data-bs-target]{
  width:10px;height:10px;
  border-radius:50%;
  background:var(--border);
  border:1px solid rgba(46,139,158,.25);
  opacity:1;
  transition:all .25s;
}
.carousel-indicators .active{
  background:var(--primary);
  width:28px;
  border-radius:var(--radius-pill);
}
.carousel-control-prev, .carousel-control-next{
  width:46px;height:46px;
  background:rgba(255,255,255,.92);
  border-radius:50%;
  top:50%;
  transform:translateY(-50%);
  margin:0 16px;
  opacity:0;
  transition:all .3s ease;
  box-shadow:var(--shadow-card);
}
.carousel-control-prev:hover, .carousel-control-next:hover{
  background:var(--primary);
  opacity:1;
}
.carousel-control-prev i, .carousel-control-next i{
  color:var(--primary);
  font-size:18px;
}
.carousel-control-prev:hover i, .carousel-control-next:hover i{
  color:#fff;
}
.preview-carousel:hover .carousel-control-prev,
.preview-carousel:hover .carousel-control-next{
  opacity:.7;
}

/* ========== Requirements ========== */
.req-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:32px;
}
.req-card{
  background:var(--bg-card);
  border-radius:12px;
  border:1px solid var(--border);
  padding:34px 30px;
  box-shadow:var(--shadow-card);
  transition:all .25s ease;
}
.req-card:hover{
  box-shadow:var(--shadow-hover);
  transform:translateY(-3px);
}
.req-card.recommend{
  border-top:3px solid var(--primary);
}
.req-card.minimum{
  border-top:3px solid var(--accent);
}
.req-title{
  display:flex;
  align-items:center;
  gap:12px;
  font-size:20px;
  font-weight:600;
  color:var(--text-main);
  margin-bottom:20px;
}
.req-title i{
  width:40px;height:40px;
  border-radius:10px;
  background:var(--primary-light);
  color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;
}
.req-card.minimum .req-title i{
  background:rgba(245,166,35,.15);
  color:var(--accent-dark);
}
.config-list{
  margin:0;
  padding:0;
  list-style:none;
}
.config-list li{
  display:flex;
  align-items:flex-start;
  gap:12px;
  padding:10px 0;
  border-bottom:1px dashed var(--border);
  font-size:14px;
  color:var(--text-secondary);
}
.config-list li:last-child{border-bottom:none}
.config-list li::before{
  content:'';
  width:8px;height:8px;
  border-radius:50%;
  background:var(--primary);
  margin-top:7px;
  flex-shrink:0;
}
.req-card.minimum .config-list li::before{
  background:var(--accent);
}
.config-list li strong{
  color:var(--text-main);
  font-weight:600;
  min-width:86px;
  flex-shrink:0;
}

/* ========== Testimonials ========== */
.testimonials-section{
  background:var(--primary-light);
  position:relative;
  overflow:hidden;
}
.testimonials-section::before{
  content:'\201C';
  position:absolute;
  font-size:260px;
  color:rgba(46,139,158,.08);
  top:-40px;right:4%;
  font-family:Georgia,serif;
  line-height:1;
}
.testimonial-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:28px;
  position:relative;
  z-index:1;
}
.testimonial-card{
  background:#fff;
  border-radius:12px;
  padding:28px 26px;
  box-shadow:var(--shadow-card);
  border:1px solid var(--border);
  transition:all .25s ease;
}
.testimonial-card:nth-child(2){
  margin-top:38px;
  background:var(--primary-dark);
  border-color:var(--primary-dark);
}
.testimonial-card:nth-child(3){
  margin-top:16px;
}
.testimonial-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
}
.stars{
  color:var(--accent);
  font-size:14px;
  letter-spacing:2px;
  margin-bottom:14px;
}
.testimonial-card:nth-child(2) .stars{color:var(--accent)}
.testimonial-text{
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.8;
  margin-bottom:20px;
  min-height:86px;
}
.testimonial-card:nth-child(2) .testimonial-text{
  color:rgba(255,255,255,.85);
}
.testimonial-user{
  display:flex;
  align-items:center;
  gap:12px;
  padding-top:16px;
  border-top:1px solid var(--border);
}
.testimonial-card:nth-child(2) .testimonial-user{
  border-top-color:rgba(255,255,255,.15);
}
.user-avatar{
  width:42px;height:42px;
  border-radius:50%;
  background:var(--primary-light);
  color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;
  flex-shrink:0;
}
.testimonial-card:nth-child(2) .user-avatar{
  background:rgba(255,255,255,.18);
  color:#fff;
}
.user-name{
  font-size:14px;
  font-weight:600;
  color:var(--text-main);
}
.user-time{
  font-size:12px;
  color:var(--text-caption);
}
.testimonial-card:nth-child(2) .user-name{color:#fff}
.testimonial-card:nth-child(2) .user-time{color:rgba(255,255,255,.7)}

/* ========== News / CMS ========== */
.news-section{
  background:#fff;
}
.news-list{
  display:flex;
  flex-direction:column;
  gap:0;
}
.news-item{
  display:flex;
  align-items:flex-start;
  gap:24px;
  padding:24px 0;
  border-bottom:1px solid var(--border);
  transition:all .25s ease;
}
.news-item:first-child{padding-top:0}
.news-item:last-child{border-bottom:none;padding-bottom:0}
.news-item:hover{
  padding-left:12px;
}
.news-thumb{
  width:180px;
  height:110px;
  border-radius:8px;
  object-fit:cover;
  flex-shrink:0;
  box-shadow:var(--shadow-card);
}
.news-info{flex:1;min-width:0}
.news-meta{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:6px;
  flex-wrap:wrap;
}
.news-meta .tag{
  display:inline-block;
  background:var(--primary-light);
  color:var(--primary);
  font-size:12px;
  font-weight:500;
  padding:2px 12px;
  border-radius:var(--radius-pill);
}
.news-meta time{
  font-size:12px;
  color:var(--text-caption);
}
.news-item h3{
  font-size:17px;
  font-weight:600;
  margin-bottom:6px;
  line-height:1.5;
}
.news-item h3 a{
  color:var(--text-main);
}
.news-item h3 a:hover{
  color:var(--primary);
}
.news-item .summary{
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.7;
  margin-bottom:8px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.read-more{
  font-size:13px;
  font-weight:500;
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.read-more:hover{gap:10px;color:var(--accent-dark)}
.empty-tip{
  text-align:center;
  padding:60px 20px;
  color:var(--text-caption);
  background:var(--bg-body);
  border-radius:12px;
  border:1px dashed var(--border);
  font-size:15px;
}

/* ========== FAQ ========== */
.faq-section{
  background:var(--bg-body);
}
.faq-wrap{
  max-width:760px;
  margin:0 auto;
}
.accordion-item{
  border:1px solid var(--border);
  border-radius:8px;
  margin-bottom:12px;
  overflow:hidden;
  box-shadow:0 2px 8px rgba(37,51,56,.03);
}
.accordion-item:last-child{margin-bottom:0}
.accordion-button{
  padding:18px 22px;
  font-size:15px;
  font-weight:600;
  color:var(--text-main);
  background:#fff;
  border:none;
  box-shadow:none;
  transition:all .2s ease;
}
.accordion-button:not(.collapsed){
  color:var(--primary);
  background:var(--primary-light);
  box-shadow:none;
  border-left:3px solid var(--primary);
}
.accordion-button:focus{
  box-shadow:0 0 0 3px rgba(46,139,158,.15);
  border-radius:8px;
}
.accordion-button::after{
  background-image:none;
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  content:"\f067";
  color:var(--text-caption);
  font-size:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  width:24px;height:24px;
  transition:transform .3s ease;
}
.accordion-button:not(.collapsed)::after{
  transform:rotate(45deg);
  color:var(--primary);
}
.accordion-body{
  padding:16px 22px 20px;
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.8;
  background:#fff;
}
.accordion-body strong{color:var(--text-main)}

/* ========== CTA ========== */
.cta-section{
  padding:72px 0;
  background:var(--primary-light);
  position:relative;
  overflow:hidden;
}
.cta-section::before{
  content:'';
  position:absolute;
  width:280px;height:280px;
  border-radius:50%;
  border:30px solid rgba(46,139,158,.07);
  top:-90px;left:-60px;
}
.cta-wrap{
  text-align:center;
  position:relative;
  z-index:1;
}
.cta-wrap h2{
  font-size:clamp(24px, 3vw, 30px);
  font-weight:700;
  color:var(--text-main);
  margin-bottom:10px;
}
.cta-wrap p{
  color:var(--text-secondary);
  font-size:15px;
  margin-bottom:28px;
}
.cta-buttons{
  display:flex;
  justify-content:center;
  gap:16px;
  flex-wrap:wrap;
}
.btn-win, .btn-mac{
  display:inline-flex;
  align-items:center;
  gap:10px;
  height:48px;
  padding:0 26px;
  border-radius:8px;
  font-size:15px;
  font-weight:600;
  transition:all .22s ease;
  text-decoration:none;
}
.btn-win{
  background:var(--primary);
  color:#fff;
  box-shadow:0 6px 18px rgba(46,139,158,.28);
}
.btn-win:hover{
  background:var(--primary-dark);
  color:#fff;
  transform:translateY(-2px);
}
.btn-mac{
  background:#fff;
  color:var(--text-main);
  border:1.5px solid var(--border);
  box-shadow:0 4px 14px rgba(37,51,56,.06);
}
.btn-mac:hover{
  border-color:var(--primary);
  color:var(--primary);
  transform:translateY(-2px);
  box-shadow:var(--shadow-hover);
}
.btn-win i, .btn-mac i{font-size:18px}

/* ========== Footer ========== */
.site-footer{
  background:var(--primary-dark);
  color:rgba(255,255,255,.88);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand .brand-logo{
  margin-bottom:16px;
}
.footer-brand .brand-text{
  color:#fff;
}
.footer-brand .brand-text small{
  color:rgba(255,255,255,.6);
}
.footer-desc{
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.7);
  margin-top:14px;
}
.footer-title{
  font-size:16px;
  font-weight:600;
  color:#fff;
  margin-bottom:18px;
  position:relative;
  padding-bottom:10px;
}
.footer-title::after{
  content:'';
  position:absolute;
  left:0;bottom:0;
  width:26px;height:2px;
  background:var(--accent);
  border-radius:2px;
}
.footer-links{
  list-style:none;
  margin:0;
  padding:0;
}
.footer-links li{margin-bottom:8px}
.footer-links a{
  color:rgba(255,255,255,.7);
  font-size:14px;
  transition:all .2s ease;
  text-decoration:none;
}
.footer-links a:hover{
  color:#fff;
  padding-left:6px;
  border-left:2px solid var(--accent);
}
.contact-item{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  color:rgba(255,255,255,.7);
  margin-bottom:12px;
}
.contact-item i{
  width:34px;height:34px;
  border-radius:50%;
  background:rgba(255,255,255,.12);
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;
  flex-shrink:0;
}
.footer-social{
  display:flex;
  gap:10px;
  margin-top:16px;
}
.footer-social a{
  width:38px;height:38px;
  border-radius:50%;
  background:rgba(255,255,255,.12);
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;
  transition:all .25s ease;
}
.footer-social a:hover{
  background:var(--accent);
  color:#fff;
  transform:translateY(-3px);
}
.footer-bottom{
  padding:20px 0;
  text-align:center;
  font-size:12px;
  color:rgba(255,255,255,.6);
}
.footer-bottom a{
  color:rgba(255,255,255,.8);
  margin:0 6px;
}
.footer-bottom a:hover{color:#fff}

/* ========== Responsive ========== */
@media (max-width: 991.98px){
  .container{padding-left:16px;padding-right:16px}
  .header-search{display:none}
  .navbar-toggler-custom{display:inline-flex}
  .header-nav{display:none}
  .hero-section{
    padding:60px 0 64px;
  }
  .hero-wrap{
    grid-template-columns:1fr;
    gap:44px;
    text-align:center;
  }
  .hero-desc{max-width:100%;margin-left:auto;margin-right:auto}
  .hero-actions{justify-content:center}
  .hero-visual .main-img{max-width:380px}
  .float-card.fc-1{left:0}
  .float-card.fc-2{right:0}
  .section{padding:72px 0}
  .feature-grid{
    grid-template-columns:repeat(2, 1fr);
    gap:24px;
  }
  .feature-card:nth-child(2){margin-top:0}
  .feature-card:nth-child(3){margin-top:0}
  .testimonial-grid{
    grid-template-columns:1fr;
    max-width:480px;
    margin:0 auto;
    gap:20px;
  }
  .testimonial-card:nth-child(2), .testimonial-card:nth-child(3){
    margin-top:0;
  }
  .req-grid{
    grid-template-columns:1fr;
    gap:24px;
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:32px;
  }
}
@media (max-width: 767.98px){
  .trust-grid{
    grid-template-columns:repeat(2,1fr);
    gap:0;
  }
  .trust-item{
    border-bottom:1px solid var(--border);
    padding:20px 12px;
  }
  .trust-item:nth-child(2){border-right:none}
  .trust-item:nth-child(3){border-bottom:none}
  .trust-item:nth-child(4){
    border-bottom:none;
    border-right:1px solid var(--border);
  }
  .section{padding:56px 0}
  .hero-section{padding:44px 0 52px}
  .feature-grid{
    grid-template-columns:1fr;
    gap:20px;
  }
  .carousel-item img{height:280px}
  .news-item{
    flex-direction:column;
    gap:14px;
  }
  .news-thumb{
    width:100%;
    height:160px;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:28px;
    padding-bottom:32px;
  }
  .cta-section{padding:52px 0}
}
@media (max-width: 575.98px){
  .brand-text{
    font-size:18px;
  }
  .brand-text small{display:none}
  .container{padding-left:14px;padding-right:14px}
  .hero-title{
    font-size:26px;
  }
  .hero-desc{
    font-size:14px;
  }
  .btn-download, .btn-more{
    flex:1;
    justify-content:center;
    padding:0 16px;
  }
  .section-title{
    font-size:22px;
    padding-left:12px;
  }
  .req-card{
    padding:24px 20px;
  }
  .cta-buttons .btn-win, .cta-buttons .btn-mac{
    width:100%;
    justify-content:center;
  }
  .trust-item .num{font-size:22px}
  .float-card{
    display:none;
  }
  .carousel-caption-custom{
    padding:28px 18px 16px;
  }
  .carousel-caption-custom h4{font-size:15px}
  .carousel-caption-custom p{font-size:12px}
  .carousel-control-prev, .carousel-control-next{
    display:none;
  }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
  --primary: #2E8B9E;
  --primary-dark: #1C5E6E;
  --primary-light: #E3F0F2;
  --accent: #F5A623;
  --accent-dark: #C77E14;
  --bg-body: #F7FAFB;
  --bg-card: #FFFFFF;
  --text-main: #253338;
  --text-secondary: #5C6F75;
  --text-caption: #8A9BA1;
  --border: #E4ECEE;
  --shadow-card: 0 4px 20px rgba(37, 51, 56, 0.06);
  --shadow-hover: 0 8px 30px rgba(37, 51, 56, 0.10);
  --radius: 8px;
  --radius-lg: 14px;
  --transition: 0.2s ease;
  --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* ===== 基础 Reset ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-family);
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--primary-dark);
}
ul,
ol {
  list-style: none;
}
button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}
button {
  border: none;
  background: none;
  cursor: pointer;
}
.container {
  max-width: 1200px;
  padding-left: 20px;
  padding-right: 20px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== 吸顶导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1050;
  background: #fff;
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.site-header.scrolled {
  box-shadow: 0 4px 16px rgba(37, 51, 56, 0.08);
}
.header-top .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  box-shadow: 0 3px 10px rgba(46, 139, 158, 0.25);
}
.brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.5px;
  line-height: 1.2;
  display: flex;
  flex-direction: column;
}
.brand-text small {
  font-size: 10px;
  font-weight: 500;
  color: var(--text-caption);
  letter-spacing: 1.2px;
  line-height: 1;
}
.header-search form {
  display: flex;
  align-items: center;
  background: var(--bg-body);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 6px 4px 18px;
  width: 320px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.header-search form:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(46, 139, 158, 0.12);
}
.header-search input {
  flex: 1;
  border: none;
  background: transparent;
  outline: none;
  font-size: 13px;
  color: var(--text-main);
  height: 32px;
}
.header-search input::placeholder {
  color: var(--text-caption);
}
.header-search button {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition);
}
.header-search button:hover {
  background: var(--primary);
  color: #fff;
}
.btn-login {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  transition: all var(--transition);
  flex-shrink: 0;
  background: #fff;
}
.btn-login:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
.navbar-toggler-custom {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-main);
  font-size: 18px;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.navbar-toggler-custom:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.header-nav {
  border-top: 1px solid var(--border);
  background: #fff;
}
.header-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-main {
  display: flex;
  gap: 4px;
  padding: 0;
  margin: 0;
}
.nav-main li a {
  display: inline-block;
  padding: 14px 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}
.nav-main li a:hover {
  color: var(--primary);
}
.nav-main li.active a {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}
.hot-tags {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-caption);
  white-space: nowrap;
}
.hot-tags span {
  color: var(--text-caption);
}
.hot-tags a {
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--primary-light);
  font-size: 12px;
  transition: all var(--transition);
}
.hot-tags a:hover {
  background: var(--primary);
  color: #fff;
}

/* 移动端菜单 */
.mobile-menu {
  display: none;
  padding: 16px 20px 20px;
  border-top: 1px solid var(--border);
  background: #fff;
}
.mobile-menu.show {
  display: block;
}
.mobile-menu .nav-main {
  flex-direction: column;
  gap: 0;
}
.mobile-menu .nav-main li a {
  display: block;
  padding: 12px 8px;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
}
.mobile-menu .nav-main li:last-child a {
  border-bottom: none;
}
.mobile-search form {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-top: 14px;
}
.mobile-search input {
  flex: 1;
  border: none;
  outline: none;
  padding: 10px 14px;
  font-size: 14px;
}
.mobile-search button {
  padding: 0 18px;
  background: var(--primary);
  color: #fff;
}
.mobile-hot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.mobile-hot a {
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary);
}
.mobile-hot a:hover {
  background: var(--primary);
  color: #fff;
}

/* ===== 页面标题区 ===== */
.page-banner {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--bg-body) 60%, #fff 100%);
  background-image: linear-gradient(135deg, rgba(46,139,158,0.08) 0%, rgba(46,139,158,0.02) 40%), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  padding: 80px 0 60px;
  border-bottom: 1px solid var(--border);
}
.breadcrumb-custom {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-caption);
  margin-bottom: 16px;
}
.breadcrumb-custom a {
  color: var(--text-caption);
  transition: color var(--transition);
}
.breadcrumb-custom a:hover {
  color: var(--primary);
}
.breadcrumb-custom .sep {
  color: var(--border);
}
.breadcrumb-custom .current {
  color: var(--primary);
  font-weight: 500;
}
.page-banner h1 {
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.page-banner .banner-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.8;
}
.page-banner .banner-meta {
  display: flex;
  gap: 24px;
  margin-top: 20px;
  flex-wrap: wrap;
}
.page-banner .banner-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-caption);
}
.page-banner .banner-meta i {
  color: var(--primary);
}

/* ===== 下载版本区 ===== */
.section {
  padding: 90px 0;
}
.section-header {
  text-align: center;
  margin-bottom: 52px;
}
.section-header .section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 5px 16px;
  border-radius: 999px;
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.section-header h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 12px;
}
.section-header p {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}
.section-header.left {
  text-align: left;
}
.section-header.left p {
  margin: 0;
}
.section-title-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
}
.section-title-bar .bar {
  width: 4px;
  height: 24px;
  border-radius: 4px;
  background: var(--primary);
}
.section-title-bar h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
  margin: 0;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  margin-top: 48px;
}
.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.download-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity var(--transition);
}
.download-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.download-card:hover::before {
  opacity: 1;
}
.download-card .os-icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  margin-bottom: 20px;
  background: var(--primary-light);
  color: var(--primary);
}
.download-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}
.download-card .version-text {
  font-size: 13px;
  color: var(--text-caption);
  margin-bottom: 16px;
}
.download-card ul {
  text-align: left;
  margin-bottom: 24px;
  padding: 0;
}
.download-card ul li {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 5px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.download-card ul li i {
  color: var(--primary);
  font-size: 13px;
  width: 18px;
  text-align: center;
}
.download-card ul li i.fa-times {
  color: var(--text-caption);
}
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 13px 36px;
  border-radius: var(--radius);
  transition: all var(--transition);
  box-shadow: 0 4px 14px rgba(245, 166, 35, 0.3);
}
.btn-download:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(199, 126, 20, 0.35);
}
.btn-download:active {
  transform: translateY(0);
  box-shadow: none;
}
.btn-download .fa-download {
  font-size: 16px;
}
.btn-outline-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1.5px solid var(--primary);
  color: var(--primary);
  font-size: 15px;
  font-weight: 500;
  padding: 12px 30px;
  border-radius: var(--radius);
  background: transparent;
  transition: all var(--transition);
}
.btn-outline-primary:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  transform: translateY(-2px);
}
.btn-outline-primary:active {
  transform: translateY(0);
}

/* ===== 扫码模块 ===== */
.qr-section {
  margin-top: 56px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.qr-left {
  display: flex;
  align-items: center;
  gap: 24px;
  flex: 1;
  min-width: 280px;
}
.qr-placeholder {
  width: 110px;
  height: 110px;
  border-radius: var(--radius);
  background: var(--primary-light);
  border: 1px dashed var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--primary);
  text-align: center;
  flex-shrink: 0;
}
.qr-left h4 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}
.qr-left p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 0;
}
.qr-right {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ===== 功能对照表 ===== */
.compare-section {
  background: #fff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 90px 0;
}
.compare-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
}
.compare-table th,
.compare-table td {
  padding: 16px 24px;
  text-align: center;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}
.compare-table thead th {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 600;
  font-size: 15px;
  border-bottom: 2px solid var(--primary);
}
.compare-table thead th:first-child {
  text-align: left;
  border-radius: 0;
}
.compare-table tbody td:first-child {
  text-align: left;
  font-weight: 500;
  color: var(--text-main);
  background: #fbfdfd;
}
.compare-table tbody tr:hover {
  background: #f8fbfc;
}
.compare-table .fa-check {
  color: #2BAE85;
  font-size: 15px;
}
.compare-table .fa-minus {
  color: var(--text-caption);
  font-size: 15px;
}

/* ===== 数据指标区 ===== */
.stats-section {
  background: var(--bg-body);
  padding: 70px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 28px;
}
.stat-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.stat-item .stat-num {
  font-size: 34px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-variant-numeric: tabular-nums;
}
.stat-item .stat-label {
  font-size: 13px;
  color: var(--text-caption);
  margin-top: 8px;
}
.stat-item .stat-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  margin-bottom: 14px;
}

/* ===== 下载 FAQ ===== */
.faq-section {
  background: var(--bg-body);
  padding: 70px 0 90px;
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item:hover {
  border-color: var(--primary-light);
}
.faq-item.active {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-card);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  gap: 16px;
}
.faq-question .faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 400;
  flex-shrink: 0;
  transition: transform 0.3s ease, background var(--transition), color var(--transition);
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}
.faq-answer {
  display: none;
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}
.faq-answer.show {
  display: block;
}

/* ===== CTA 横幅 ===== */
.cta-banner {
  background: linear-gradient(120deg, var(--primary-dark), var(--primary));
  padding: 70px 0;
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.1);
}
.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -60%;
  left: -5%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.08);
}
.cta-banner h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}
.cta-banner p {
  font-size: 15px;
  opacity: 0.9;
  margin-bottom: 30px;
  position: relative;
  z-index: 1;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}
.cta-banner .cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}
.cta-banner .btn-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--primary-dark);
  font-weight: 600;
  font-size: 15px;
  padding: 14px 34px;
  border-radius: var(--radius);
  transition: all var(--transition);
}
.cta-banner .btn-white:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}
.cta-banner .btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1.5px solid rgba(255, 255, 255, 0.7);
  color: #fff;
  font-weight: 500;
  font-size: 15px;
  padding: 13px 34px;
  border-radius: var(--radius);
  transition: all var(--transition);
}
.cta-banner .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.85);
  padding: 70px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding-bottom: 40px;
}
.footer-brand .brand-logo {
  margin-bottom: 16px;
}
.footer-brand .brand-icon {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.footer-brand .brand-text {
  color: #fff;
}
.footer-brand .brand-text small {
  color: rgba(255, 255, 255, 0.5);
}
.footer-desc {
  font-size: 13px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 16px;
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.footer-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: rgba(255, 255, 255, 0.4);
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 13px;
  transition: color var(--transition), padding-left var(--transition);
}
.footer-links a:hover {
  color: #fff;
  padding-left: 6px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 12px;
}
.contact-item i {
  color: rgba(255, 255, 255, 0.5);
  width: 16px;
  text-align: center;
}
.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}
.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  transition: all var(--transition);
}
.footer-social a:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  transform: translateY(-2px);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}
.footer-bottom a {
  color: rgba(255, 255, 255, 0.5);
}
.footer-bottom a:hover {
  color: #fff;
}

/* ===== 焦点态 ===== */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}
input:focus-visible {
  outline: 3px solid rgba(46, 139, 158, 0.2);
}

/* ===== 响应式 ===== */
@media (max-width: 992px) {
  .header-top .container {
    flex-wrap: nowrap;
    gap: 12px;
  }
  .header-search {
    display: none;
  }
  .navbar-toggler-custom {
    display: inline-flex;
  }
  .header-nav.d-none {
    display: none !important;
  }
  .btn-login {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .section {
    padding: 70px 0;
  }
  .compare-section {
    padding: 70px 0;
  }
  .download-card {
    padding: 30px 24px;
  }
}
@media (max-width: 768px) {
  .page-banner {
    padding: 50px 0 40px;
  }
  .page-banner h1 {
    font-size: 28px;
  }
  .section-header {
    margin-bottom: 36px;
  }
  .qr-section {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }
  .qr-left {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }
  .qr-right {
    justify-content: center;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .download-grid {
    grid-template-columns: 1fr;
  }
  .cta-banner {
    padding: 50px 0;
  }
  .compare-table th,
  .compare-table td {
    padding: 12px 14px;
    font-size: 13px;
  }
  .section-title-bar h2 {
    font-size: 20px;
  }
}
@media (max-width: 576px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .brand-text {
    font-size: 17px;
  }
  .brand-icon {
    width: 34px;
    height: 34px;
    font-size: 15px;
  }
  .page-banner h1 {
    font-size: 24px;
  }
  .page-banner .banner-meta {
    flex-direction: column;
    gap: 8px;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .stat-item {
    padding: 20px 12px;
  }
  .stat-item .stat-num {
    font-size: 24px;
  }
  .compare-table thead th {
    font-size: 13px;
  }
  .compare-table th,
  .compare-table td {
    padding: 10px 8px;
    font-size: 12px;
  }
  .faq-question {
    padding: 15px 16px;
    font-size: 14px;
  }
  .faq-answer {
    padding: 0 16px 16px;
    font-size: 13px;
  }
  .cta-banner h2 {
    font-size: 22px;
  }
  .cta-banner .btn-white,
  .cta-banner .btn-ghost {
    width: 100%;
    justify-content: center;
  }
}

/* roulang page: article */
:root{
    --primary:#2E8B9E;
    --primary-dark:#1C5E6E;
    --primary-light:#E3F0F2;
    --accent:#F5A623;
    --accent-dark:#C77E14;
    --bg-body:#F7FAFB;
    --bg-card:#FFFFFF;
    --text-main:#253338;
    --text-secondary:#5C6F75;
    --text-caption:#8A9BA1;
    --border:#E4ECEE;
    --shadow-card:0 4px 20px rgba(37,51,56,.06);
    --shadow-hover:0 8px 30px rgba(37,51,56,.10);
    --radius:8px;
    --trans:.2s ease;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
    font-size:15px;
    line-height:1.7;
    background:var(--bg-body);
    color:var(--text-main);
    -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{text-decoration:none;color:inherit;transition:var(--trans);}
button,input{font-family:inherit;}
.container{max-width:1200px;padding-left:20px;padding-right:20px;}
@media(min-width:1400px){.container{max-width:1200px;}}
.row{--bs-gutter-x:28px;}
:focus-visible{outline:3px solid rgba(46,139,158,.35);outline-offset:2px;border-radius:4px;}

/* ========= Header ========= */
.site-header{
    position:sticky;top:0;z-index:1050;
    background:#fff;
    border-bottom:1px solid var(--border);
    transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 18px rgba(37,51,56,.06);}
.header-top{border-bottom:1px solid var(--border);}
.header-top .container{
    display:flex;align-items:center;gap:16px;
    padding-top:10px;padding-bottom:10px;
}
.brand-logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-icon{
    width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
    background:var(--primary);color:#fff;border-radius:10px;font-size:17px;
    box-shadow:0 4px 10px rgba(46,139,158,.22);
}
.brand-text{
    font-size:20px;font-weight:700;color:var(--text-main);letter-spacing:.3px;
    line-height:1.15;display:inline-flex;flex-direction:column;
}
.brand-text small{font-size:9px;font-weight:600;color:var(--text-caption);letter-spacing:2px;margin-top:2px;}
.header-search{margin-left:auto;}
.header-search form{display:flex;align-items:center;background:var(--bg-body);border:1px solid var(--border);border-radius:999px;overflow:hidden;transition:var(--trans);}
.header-search form:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(46,139,158,.12);}
.header-search input{width:260px;height:38px;border:0;background:transparent;padding:0 16px;font-size:14px;color:var(--text-main);outline:none;}
.header-search button{border:0;background:transparent;color:var(--text-caption);padding:0 14px;height:38px;cursor:pointer;font-size:14px;}
.header-search button:hover{color:var(--primary);}
.btn-login{
    font-size:14px;font-weight:600;color:var(--text-secondary);
    padding:8px 6px;border-radius:6px;flex-shrink:0;
    display:inline-flex;align-items:center;gap:6px;
}
.btn-login:hover{color:var(--primary);}
.navbar-toggler-custom{
    display:none;border:1px solid var(--border);background:#fff;color:var(--text-main);
    width:40px;height:40px;border-radius:8px;align-items:center;justify-content:center;
    cursor:pointer;font-size:17px;transition:var(--trans);
}
.navbar-toggler-custom:hover{background:var(--primary-light);border-color:var(--primary);color:var(--primary);}
.header-nav{border-top:1px solid transparent;}
.header-nav .container{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:8px;padding-bottom:8px;}
.nav-main{list-style:none;margin:0;padding:0;display:flex;align-items:center;gap:6px;}
.nav-main li a{
    display:inline-block;padding:8px 18px;border-radius:999px;font-size:15px;font-weight:500;
    color:var(--text-main);transition:var(--trans);line-height:1.4;
}
.nav-main li a:hover{background:var(--primary-light);color:var(--primary);}
.nav-main li.active a{background:var(--primary);color:#fff;box-shadow:0 4px 12px rgba(46,139,158,.25);}
.hot-tags{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-secondary);flex-wrap:wrap;justify-content:flex-end;}
.hot-tags a{padding:4px 11px;border-radius:999px;background:#fff;border:1px solid var(--border);color:var(--text-secondary);font-size:13px;transition:var(--trans);}
.hot-tags a:hover{color:var(--primary);border-color:var(--primary);background:var(--primary-light);}
.mobile-menu{display:none;background:#fff;border-top:1px solid var(--border);padding:18px 0 22px;}
.mobile-menu .nav-main{flex-direction:column;align-items:stretch;gap:4px;padding:0 20px;}
.mobile-menu .nav-main li a{display:block;padding:11px 16px;border-radius:8px;font-size:15px;}
.mobile-menu .nav-main li.active a{background:var(--primary);color:#fff;}
.mobile-search{padding:14px 20px 6px;}
.mobile-search form{display:flex;align-items:center;background:var(--bg-body);border:1px solid var(--border);border-radius:999px;overflow:hidden;}
.mobile-search input{flex:1;height:42px;border:0;background:transparent;padding:0 16px;outline:none;font-size:14px;}
.mobile-search button{border:0;background:transparent;color:var(--text-caption);padding:0 14px;cursor:pointer;}
.mobile-hot{display:flex;flex-wrap:wrap;gap:8px;padding:12px 20px 0;}
.mobile-hot a{padding:6px 14px;border-radius:999px;background:var(--primary-light);color:var(--primary-dark);font-size:13px;font-weight:500;}
.mobile-hot a:hover{background:var(--primary);color:#fff;}

@media(max-width:991px){
  .navbar-toggler-custom{display:inline-flex;}
  .header-search{display:none;}
  .btn-login{display:none;}
  .mobile-menu.open{display:block;}
}
@media(min-width:992px){
  .mobile-menu{display:none !important;}
}

/* ========= Article Banner ========= */
.article-banner{
    padding:64px 0 62px;
    color:#fff;
    background:linear-gradient(135deg, rgba(46,139,158,.92), rgba(28,94,110,.80)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
    border-bottom:4px solid var(--accent);
}
.breadcrumb-bar{
    display:flex;align-items:center;flex-wrap:wrap;gap:8px;
    font-size:14px;color:rgba(255,255,255,.8);margin-bottom:20px;
}
.breadcrumb-bar a{color:rgba(255,255,255,.85);}
.breadcrumb-bar a:hover{color:#fff;}
.breadcrumb-bar .sep{font-size:11px;opacity:.65;}
.breadcrumb-bar .current{color:#fff;opacity:.95;}
.article-banner .badge-cat{
    display:inline-block;background:var(--accent);color:#fff;
    font-size:13px;font-weight:600;padding:5px 14px;border-radius:999px;margin-bottom:12px;
}
.article-banner h1{
    font-size:clamp(28px,5vw,40px);font-weight:700;line-height:1.35;
    margin:0 0 14px;max-width:880px;color:#fff;letter-spacing:.3px;
}
.article-meta{display:flex;flex-wrap:wrap;gap:18px;font-size:14px;color:rgba(255,255,255,.84);}
.article-meta span{display:inline-flex;align-items:center;gap:6px;}
.article-meta i{opacity:.85;}

/* ========= Article Body ========= */
.article-main{padding:44px 0 24px;}
.article-content{max-width:760px;margin:0 auto;}
.article-content p{font-size:16px;line-height:1.9;color:var(--text-main);margin:0 0 24px;word-break:break-word;}
.article-content h2{
    font-size:24px;font-weight:700;color:var(--text-main);margin:38px 0 16px;
    padding-left:14px;border-left:4px solid var(--primary);line-height:1.4;
}
.article-content h3{font-size:20px;font-weight:600;color:var(--text-main);margin:32px 0 12px;line-height:1.45;}
.article-content h4{font-size:17px;font-weight:600;margin:26px 0 10px;}
.article-content a{color:var(--primary);border-bottom:1px solid transparent;}
.article-content a:hover{color:var(--primary-dark);border-bottom-color:var(--primary);}
.article-content img{border-radius:12px;box-shadow:var(--shadow-card);margin:24px 0;height:auto;}
.article-content blockquote{
    background:var(--primary-light);border-left:4px solid var(--primary);
    padding:18px 22px;border-radius:0 12px 12px 0;color:var(--text-secondary);
    margin:26px 0;font-size:15px;line-height:1.8;
}
.article-content blockquote p:last-child{margin-bottom:0;}
.article-content ul,.article-content ol{padding-left:1.4em;margin-bottom:24px;}
.article-content li{margin-bottom:8px;line-height:1.85;color:var(--text-main);}
.article-content pre{
    background:#fff;border:1px solid var(--border);border-radius:12px;
    padding:18px 20px;overflow-x:auto;margin:24px 0;font-size:14px;line-height:1.7;
}
.article-content code{font-family:"SF Mono",Consolas,Menlo,monospace;font-size:.92em;background:var(--primary-light);color:var(--primary-dark);padding:2px 6px;border-radius:4px;}
.article-content pre code{background:transparent;padding:0;color:var(--text-main);}
.article-content figure{margin:26px 0;}
.article-content figcaption,.article-content figure figcaption{
    font-size:13px;color:var(--text-caption);text-align:center;margin-top:-12px;
}
.article-content table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;}
.article-content th,.article-content td{border:1px solid var(--border);padding:10px 12px;text-align:left;}
.article-content th{background:var(--primary-light);color:var(--primary-dark);}

/* ========= Article Footer Panel ========= */
.article-footer-panel{padding:10px 0 36px;}
.article-footer-inner{
    max-width:760px;margin:0 auto;padding-top:26px;border-top:1px solid var(--border);
    display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
}
.article-tags .tag-label{
    display:inline-block;background:var(--primary-light);color:var(--primary-dark);
    font-size:13px;padding:5px 14px;border-radius:999px;margin-right:6px;margin-bottom:4px;font-weight:500;
}
.article-share{display:flex;align-items:center;gap:8px;}
.article-share a{
    display:inline-flex;align-items:center;justify-content:center;
    width:34px;height:34px;border:1px solid var(--border);border-radius:50%;
    color:var(--text-secondary);font-size:14px;transition:var(--trans);background:#fff;
}
.article-share a:hover{color:var(--primary);border-color:var(--primary);background:var(--primary-light);transform:translateY(-2px);}
.prev-next-row{
    max-width:760px;margin:28px auto 0;
    display:grid;grid-template-columns:1fr 1fr;gap:18px;
}
.pn-card{
    display:block;background:#fff;border:1px solid var(--border);border-radius:12px;
    padding:18px 22px;box-shadow:var(--shadow-card);transition:var(--trans);
}
.pn-card:hover{border-color:var(--primary);box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.pn-label{font-size:13px;color:var(--text-caption);display:block;margin-bottom:4px;}
.pn-title{font-size:16px;font-weight:600;color:var(--text-main);line-height:1.5;}
.pn-card:hover .pn-title{color:var(--primary);}
.text-end{text-align:right;}

/* ========= Related ========= */
.related-section{padding:64px 0 74px;background:var(--primary-light);border-top:1px solid #fff;}
.section-head{margin-bottom:36px;display:flex;align-items:center;gap:14px;}
.section-head h2{
    font-size:clamp(22px,3vw,28px);font-weight:700;color:var(--text-main);margin:0;
    padding-left:14px;border-left:4px solid var(--primary);line-height:1.3;
}
.section-head .section-sub{color:var(--text-caption);font-size:14px;margin-top:6px;}
.related-card-col{margin-bottom:28px;}
@media(min-width:768px){
  .related-card-col:nth-child(2){margin-top:34px;}
  .related-card-col:nth-child(3){margin-top:6px;}
}
.related-card{
    display:flex;flex-direction:column;background:var(--bg-card);border-radius:14px;
    overflow:hidden;box-shadow:var(--shadow-card);transition:var(--trans);height:100%;
    border:1px solid transparent;
}
.related-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-5px);border-color:var(--primary);}
.related-card .thumb-wrap{position:relative;overflow:hidden;}
.related-card .thumb-wrap img{width:100%;height:190px;object-fit:cover;transition:transform .4s ease;}
.related-card:hover .thumb-wrap img{transform:scale(1.04);}
.badge-tag{
    position:absolute;top:14px;left:14px;z-index:2;
    background:rgba(255,255,255,.94);color:var(--primary-dark);
    font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px;box-shadow:0 2px 8px rgba(0,0,0,.08);
}
.related-card .card-body{padding:20px 22px 22px;}
.related-card h3{font-size:18px;font-weight:600;margin:0 0 8px;color:var(--text-main);line-height:1.5;}
.related-card:hover h3{color:var(--primary);}
.related-card p{font-size:14px;color:var(--text-secondary);line-height:1.7;margin:0;}
.related-card .card-meta{margin-top:12px;font-size:13px;color:var(--text-caption);display:flex;gap:12px;align-items:center;}

/* ========= CTA Band ========= */
.cta-band{
    padding:72px 0;text-align:center;color:#fff;
    background:linear-gradient(135deg, rgba(46,139,158,.90), rgba(28,94,110,.78)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.cta-band h2{font-size:clamp(24px,4vw,34px);font-weight:700;margin:0 0 12px;color:#fff;}
.cta-band p{margin:0 auto 32px;max-width:620px;font-size:16px;color:rgba(255,255,255,.9);line-height:1.8;}
.cta-buttons{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
.btn-accent{
    display:inline-flex;align-items:center;gap:8px;
    background:var(--accent);border:1px solid var(--accent);color:#fff;font-weight:600;
    padding:13px 30px;border-radius:var(--radius);transition:var(--trans);
}
.btn-accent:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:#fff;transform:translateY(-2px);box-shadow:0 8px 24px rgba(245,166,35,.32);}
.btn-outline-light{
    display:inline-flex;align-items:center;gap:8px;
    background:transparent;border:2px solid rgba(255,255,255,.9);color:#fff;font-weight:600;
    padding:12px 28px;border-radius:var(--radius);transition:var(--trans);
}
.btn-outline-light:hover{background:rgba(255,255,255,.12);color:#fff;transform:translateY(-2px);}

/* ========= Missing ========= */
.article-missing{padding:96px 0;text-align:center;}
.article-missing h1{font-size:clamp(26px,4vw,36px);font-weight:700;color:var(--text-main);}
.article-missing p{color:var(--text-secondary);font-size:16px;margin:12px 0 28px;}
.btn-primary{
    display:inline-flex;align-items:center;gap:8px;
    background:var(--primary);border:1px solid var(--primary);color:#fff;font-weight:600;
    padding:12px 28px;border-radius:var(--radius);transition:var(--trans);
}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 8px 22px rgba(46,139,158,.28);}

/* ========= Footer ========= */
.site-footer{background:var(--primary-dark);color:rgba(255,255,255,.78);padding-top:58px;}
.footer-grid{
    display:grid;grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:38px;
    padding-bottom:42px;
}
.footer-brand .brand-logo .brand-text{color:#fff;}
.footer-brand .brand-icon{background:rgba(255,255,255,.12);}
.footer-desc{margin:18px 0 0;font-size:14px;line-height:1.9;color:rgba(255,255,255,.68);max-width:300px;}
.footer-title{margin:0 0 16px;color:#fff;font-size:15px;font-weight:600;letter-spacing:.5px;}
.footer-links{list-style:none;margin:0;padding:0;}
.footer-links li{margin-bottom:10px;}
.footer-links a{color:rgba(255,255,255,.72);font-size:14px;transition:var(--trans);}
.footer-links a:hover{color:#fff;padding-left:4px;}
.contact-item{font-size:14px;color:rgba(255,255,255,.72);margin-bottom:10px;display:flex;align-items:center;gap:8px;}
.contact-item i{width:15px;color:var(--accent);}
.footer-social{display:flex;gap:10px;margin-top:16px;}
.footer-social a{
    width:34px;height:34px;border-radius:50%;background:rgba(255,255,255,.08);
    display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:14px;transition:var(--trans);
}
.footer-social a:hover{background:var(--accent);color:#fff;transform:translateY(-3px);}
.footer-bottom{
    border-top:1px solid rgba(255,255,255,.14);padding:20px 0;text-align:center;font-size:12px;
}
.footer-bottom a{color:rgba(255,255,255,.6);}
.footer-bottom a:hover{color:#fff;}

/* ========= Responsive ========= */
@media(max-width:991px){
    .article-banner{padding:48px 0 48px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media(max-width:768px){
    .prev-next-row{grid-template-columns:1fr;gap:12px;}
    .article-meta{gap:10px 14px;}
    .footer-grid{grid-template-columns:1fr;}
}
@media(max-width:576px){
    .container{padding-left:16px;padding-right:16px;}
    .brand-text{font-size:17px;}
    .brand-text small{font-size:8px;}
    .brand-icon{width:34px;height:34px;font-size:15px;}
    .article-banner{padding:38px 0 42px;}
    .article-banner h1{font-size:26px;}
    .article-metainner{gap:10px 12px;}
    .cta-buttons .btn-accent,.cta-buttons .btn-outline-light{width:100%;justify-content:center;}
    .related-card .thumb-wrap img{height:170px;}
}

/* roulang page: category2 */
:root {
            --primary: #2E8B9E;
            --primary-dark: #1C5E6E;
            --primary-light: #E3F0F2;
            --accent: #F5A623;
            --accent-dark: #C77E14;
            --bg-body: #F7FAFB;
            --bg-card: #FFFFFF;
            --text-main: #253338;
            --text-secondary: #5C6F75;
            --text-caption: #8A9BA1;
            --border: #E4ECEE;
            --shadow-card: 0 4px 20px rgba(37, 51, 56, 0.06);
            --shadow-hover: 0 8px 30px rgba(37, 51, 56, 0.10);
            --radius: 8px;
            --radius-pill: 999px;
            --transition: all 0.2s ease;
            --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        button,
        input {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }
        .row {
            --bs-gutter-x: 28px;
            --bs-gutter-y: 28px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: #fff;
            border-bottom: 1px solid var(--border);
            transition: box-shadow 0.2s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(37, 51, 56, 0.06);
        }
        .header-top {
            background: #fff;
        }
        .header-top .container {
            display: flex;
            align-items: center;
            gap: 24px;
            height: 68px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(46, 139, 158, 0.25);
        }
        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
            display: flex;
            flex-direction: column;
            letter-spacing: 0.5px;
        }
        .brand-text small {
            font-size: 10px;
            letter-spacing: 1px;
            color: var(--text-caption);
            font-weight: 500;
            line-height: 1.2;
        }
        .header-search {
            flex: 1;
            max-width: 440px;
            margin-left: auto;
        }
        .header-search form {
            position: relative;
        }
        .header-search input {
            width: 100%;
            height: 40px;
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 0 44px 0 18px;
            font-size: 14px;
            background: var(--bg-body);
            transition: var(--transition);
            color: var(--text-main);
        }
        .header-search input::placeholder {
            color: var(--text-caption);
        }
        .header-search input:focus {
            outline: none;
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(46, 139, 158, 0.12);
        }
        .header-search button {
            position: absolute;
            right: 4px;
            top: 4px;
            bottom: 4px;
            width: 32px;
            border: none;
            background: var(--primary);
            color: #fff;
            border-radius: 999px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .header-search button:hover {
            background: var(--primary-dark);
        }
        .btn-login {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            height: 40px;
            padding: 0 18px;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            background: #fff;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-login:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }
        .navbar-toggler-custom {
            display: none;
            width: 40px;
            height: 40px;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            background: #fff;
            color: var(--primary);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
            cursor: pointer;
        }
        .navbar-toggler-custom:hover {
            background: var(--primary-light);
            border-color: var(--primary);
        }
        .header-nav {
            background: #fff;
            border-top: 1px solid var(--border);
        }
        .header-nav .container {
            display: flex;
            align-items: center;
            gap: 28px;
            min-height: 48px;
        }
        .nav-main {
            display: flex;
            gap: 4px;
            flex-shrink: 0;
        }
        .nav-main li a {
            display: block;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-main li a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-main li.active a {
            color: var(--primary-dark);
            background: var(--primary-light);
            font-weight: 600;
        }
        .hot-tags {
            margin-left: auto;
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-caption);
            white-space: nowrap;
        }
        .hot-tags a {
            color: var(--text-secondary);
            font-weight: 500;
        }
        .hot-tags a:hover {
            color: var(--primary);
        }
        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 16px;
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu .nav-main {
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu .nav-main li a {
            width: 100%;
            padding: 12px 16px;
            border-radius: var(--radius);
        }
        .mobile-search {
            margin-top: 14px;
        }
        .mobile-search form {
            position: relative;
        }
        .mobile-search input {
            width: 100%;
            height: 42px;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 0 44px 0 14px;
            font-size: 14px;
            background: var(--bg-body);
            color: var(--text-main);
            transition: var(--transition);
        }
        .mobile-search input:focus {
            outline: none;
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(46, 139, 158, 0.12);
        }
        .mobile-search button {
            position: absolute;
            right: 4px;
            top: 4px;
            bottom: 4px;
            width: 34px;
            border: none;
            background: var(--primary);
            color: #fff;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .mobile-hot {
            margin-top: 14px;
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .mobile-hot a {
            font-size: 13px;
            color: var(--text-secondary);
            background: var(--bg-body);
            padding: 5px 14px;
            border-radius: 999px;
            transition: var(--transition);
        }
        .mobile-hot a:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .mobile-login {
            margin-top: 14px;
        }
        .mobile-login .btn-login {
            width: 100%;
            justify-content: center;
        }
        .page-banner {
            background: linear-gradient(135deg, rgba(227, 240, 242, 0.92) 0%, rgba(247, 250, 251, 0.96) 55%, rgba(255, 255, 255, 0.98) 100%), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            border-bottom: 1px solid var(--border);
            padding: 64px 0 56px;
            position: relative;
            overflow: hidden;
        }
        .breadcrumb-nav {
            font-size: 13px;
            color: var(--text-caption);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .breadcrumb-nav a {
            color: var(--text-caption);
        }
        .breadcrumb-nav a:hover {
            color: var(--primary);
        }
        .breadcrumb-nav .sep {
            margin: 0 8px;
            color: #c5d3d6;
        }
        .page-banner h1 {
            font-size: clamp(30px, 4vw, 40px);
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            line-height: 1.3;
            letter-spacing: 0.5px;
            position: relative;
            display: inline-block;
            padding-left: 16px;
        }
        .page-banner h1::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 4px;
            background: var(--accent);
        }
        .banner-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 520px;
            margin-bottom: 8px;
            line-height: 1.8;
        }
        .banner-image {
            border-radius: 16px;
            box-shadow: var(--shadow-hover);
            width: 100%;
            max-width: 420px;
            margin: 0 auto;
        }
        .search-section {
            padding: 56px 0 8px;
        }
        .search-box-wrap {
            max-width: 680px;
            margin: 0 auto;
            text-align: center;
        }
        .search-box-wrap h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .search-box-wrap .sub {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 28px;
        }
        .search-big form {
            display: flex;
            gap: 8px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 6px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .search-big form:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(46, 139, 158, 0.1);
        }
        .search-big input {
            flex: 1;
            border: none;
            outline: none;
            height: 40px;
            padding: 0 16px;
            font-size: 15px;
            background: transparent;
            color: var(--text-main);
            min-width: 0;
        }
        .search-big button {
            height: 40px;
            padding: 0 28px;
            border: none;
            border-radius: 999px;
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }
        .search-big button:hover {
            background: var(--accent-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(245, 166, 35, 0.3);
        }
        .search-tags {
            margin-top: 16px;
            display: flex;
            justify-content: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .search-tags a {
            font-size: 13px;
            color: var(--text-secondary);
            background: var(--primary-light);
            padding: 5px 14px;
            border-radius: 999px;
            transition: var(--transition);
            font-weight: 500;
        }
        .search-tags a:hover {
            color: #fff;
            background: var(--primary);
            transform: translateY(-2px);
        }
        .tutorial-section {
            padding: 56px 0 16px;
        }
        .section-head {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            letter-spacing: 0.5px;
            display: inline-block;
            position: relative;
            padding-bottom: 12px;
        }
        .section-head h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 48px;
            height: 3px;
            border-radius: 3px;
            background: var(--accent);
        }
        .section-head p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-top: 12px;
        }
        .tutorial-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 30px 24px;
            height: 100%;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .tutorial-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .tutorial-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .tutorial-card:hover::before {
            opacity: 1;
        }
        .tutorial-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 18px;
            transition: var(--transition);
        }
        .tutorial-card:hover .tutorial-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }
        .tutorial-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .tutorial-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }
        .tutorial-more {
            margin-top: 14px;
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .tutorial-more i {
            font-size: 12px;
            transition: var(--transition);
        }
        .tutorial-card:hover .tutorial-more i {
            transform: translateX(4px);
        }
        .steps-section {
            padding: 56px 0;
        }
        .steps-wrap {
            display: flex;
            gap: 16px;
            align-items: stretch;
            margin-top: 16px;
        }
        .step-item {
            flex: 1;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 32px 20px 28px;
            text-align: center;
            position: relative;
            transition: var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .step-num {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 16px;
            box-shadow: 0 4px 12px rgba(46, 139, 158, 0.25);
        }
        .step-item h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .step-item p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .step-arrow {
            position: absolute;
            right: -12px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--primary);
            z-index: 2;
            font-size: 18px;
            background: var(--bg-body);
            border-radius: 50%;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .faq-section {
            padding: 60px 0;
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .faq-item {
            background: var(--bg-body);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 22px 26px;
            margin-bottom: 14px;
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: var(--primary);
            background: #fff;
        }
        .faq-item.open {
            border-left: 3px solid var(--primary);
            background: #fff;
            box-shadow: var(--shadow-card);
        }
        .faq-item h3 {
            font-size: 15px;
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            margin-bottom: 0;
            color: var(--text-main);
            line-height: 1.5;
        }
        .faq-icon {
            color: var(--primary);
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            transition: transform 0.25s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-answer {
            display: none;
            margin-top: 14px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
            border-top: 1px dashed var(--border);
            padding-top: 14px;
            margin-bottom: 0;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .cta-banner {
            padding: 60px 0;
        }
        .cta-banner .inner {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: 20px;
            padding: 44px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
            color: #fff;
            box-shadow: var(--shadow-hover);
            position: relative;
            overflow: hidden;
        }
        .cta-banner .inner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: 12%;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }
        .cta-banner .inner::after {
            content: '';
            position: absolute;
            bottom: -50px;
            left: 8%;
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
        }
        .cta-content {
            position: relative;
            z-index: 2;
            flex: 1;
            min-width: 280px;
        }
        .cta-content h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
            color: #fff;
        }
        .cta-content p {
            margin-bottom: 0;
            color: rgba(255, 255, 255, 0.88);
            font-size: 14px;
            line-height: 1.7;
        }
        .cta-btns {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
            flex-shrink: 0;
        }
        .btn-light-custom {
            background: #fff;
            color: var(--primary-dark);
            border: none;
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-light-custom:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.65);
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 280px 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-brand .brand-logo .brand-text {
            color: #fff;
        }
        .footer-brand .brand-logo .brand-text small {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-brand .brand-icon {
            background: rgba(255, 255, 255, 0.15);
            box-shadow: none;
        }
        .footer-desc {
            font-size: 13px;
            line-height: 1.8;
            margin-top: 16px;
            color: rgba(255, 255, 255, 0.7);
        }
        .footer-title {
            font-size: 15px;
            color: #fff;
            margin-bottom: 16px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
            line-height: 1.5;
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .contact-item {
            font-size: 13px;
            margin-bottom: 10px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.6;
        }
        .contact-item i {
            width: 18px;
            margin-right: 6px;
            color: var(--accent);
            text-align: center;
        }
        .footer-social {
            margin-top: 14px;
            display: flex;
            gap: 10px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.8);
            transition: var(--transition);
            font-size: 14px;
        }
        .footer-social a:hover {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding: 16px 0;
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom p {
            margin: 0;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.75);
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        @media (max-width: 991.98px) {
            .navbar-toggler-custom {
                display: flex;
            }
            .header-search {
                display: none;
            }
            .btn-login {
                display: none;
            }
            .header-top .container {
                gap: 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .steps-wrap {
                flex-direction: column;
                max-width: 420px;
                margin-left: auto;
                margin-right: auto;
            }
            .step-arrow {
                display: none;
            }
            .cta-banner .inner {
                flex-direction: column;
                text-align: center;
                padding: 36px 28px;
            }
            .cta-btns {
                justify-content: center;
            }
        }
        @media (max-width: 767.98px) {
            .page-banner {
                padding: 40px 0 32px;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .banner-desc {
                font-size: 15px;
            }
            .search-section {
                padding: 40px 0 8px;
            }
            .tutorial-section {
                padding: 40px 0 8px;
            }
            .steps-section {
                padding: 40px 0;
            }
            .faq-section {
                padding: 44px 0;
            }
            .cta-banner {
                padding: 40px 0;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                padding-bottom: 28px;
            }
            .search-big form {
                flex-direction: column;
                border-radius: 16px;
                padding: 10px;
            }
            .search-big input {
                border: 1px solid var(--border);
                border-radius: 10px;
                padding: 0 14px;
            }
            .search-big button {
                justify-content: center;
                width: 100%;
            }
        }
        @media (max-width: 575.98px) {
            .header-top .container {
                height: 60px;
                gap: 10px;
            }
            .brand-text {
                font-size: 17px;
            }
            .brand-text small {
                font-size: 9px;
            }
            .brand-icon {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-banner h1 {
                padding-left: 12px;
                font-size: 25px;
            }
            .faq-item {
                padding: 18px 18px;
            }
            .faq-item h3 {
                font-size: 14px;
            }
            .cta-banner .inner {
                padding: 30px 20px;
            }
            .cta-btns {
                flex-direction: column;
                width: 100%;
            }
            .btn-light-custom,
            .btn-outline-light {
                width: 100%;
                justify-content: center;
            }
        }