/* roulang page: index */
:root{
  --bg-body:#F3F6FB;
  --bg-deep:#E7EDF6;
  --surface:#FFFFFF;
  --surface-muted:#F8FAFE;
  --brand-600:#3D62D9;
  --brand-700:#3151B5;
  --brand-100:#E5ECFA;
  --brand-50:#F1F5FE;
  --accent:#F2A93B;
  --star-dot:#9DB6E4;
  --text-strong:#1B2738;
  --text-body:#3F4D62;
  --text-muted:#6B7B93;
  --line:#D9E1EE;
  --line-light:#E8EEF7;
  --shadow-1:0 2px 8px rgba(40,66,105,.05);
  --shadow-2:0 6px 18px rgba(40,66,105,.08);
  --shadow-3:0 16px 40px rgba(40,66,105,.12);
  --radius-md:8px;
  --radius-lg:16px;
  --radius-xl:24px;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
}
html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}
*,
*::before,
*::after{
  box-sizing:border-box;
}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--text-body);
  background:var(--bg-body);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{
  color:var(--text-strong);
  line-height:1.35;
  margin:0 0 16px;
}
p{margin:0 0 16px;}
a{
  color:var(--brand-600);
  text-decoration:none;
  transition:color .2s ease, background .2s ease, border .2s ease, box-shadow .2s ease, transform .18s ease;
}
a:hover{
  color:var(--brand-700);
}
img{
  max-width:100%;
  height:auto;
  display:block;
}
button,input,select,textarea{
  font-family:inherit;
}
.container{
  max-width:1200px;
}
.header-wide{
  max-width:1300px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:var(--radius-md);
  padding:.66rem 1.3rem;
  font-size:15px;
  font-weight:500;
  line-height:1.5;
  border-width:1px;
  border-style:solid;
  cursor:pointer;
  transition:all .18s ease;
}
.btn-brand{
  background:var(--brand-600);
  border-color:var(--brand-600);
  color:#fff;
  box-shadow:var(--shadow-1);
}
.btn-brand:hover,
.btn-brand:focus{
  background:var(--brand-700);
  border-color:var(--brand-700);
  color:#fff;
  box-shadow:var(--shadow-2);
  transform:translateY(-1px);
}
.btn-outline{
  background:var(--surface);
  border-color:var(--line);
  color:var(--text-body);
  box-shadow:var(--shadow-1);
}
.btn-outline:hover,
.btn-outline:focus{
  border-color:var(--brand-600);
  color:var(--brand-600);
  box-shadow:var(--shadow-2);
  transform:translateY(-1px);
}
.btn-ghost{
  background:transparent;
  border-color:transparent;
  color:var(--text-body);
  padding-left:8px;
  padding-right:8px;
}
.btn-ghost:hover,
.btn-ghost:focus{
  color:var(--brand-600);
}
.btn-ghost .arrow{
  display:inline-block;
  transition:transform .18s ease;
}
.btn-ghost:hover .arrow{
  transform:translateX(4px);
}
.section{
  padding:clamp(3.5rem,7vw,6rem) 0;
  position:relative;
}
.section-bg-white{
  background:var(--surface);
}
.section-bg-deep{
  background:var(--bg-deep);
}
.section-padding-tight{
  padding:clamp(3rem,5vw,4.5rem) 0;
}
.sec-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:500;
  letter-spacing:.06em;
  color:var(--brand-600);
  margin-bottom:14px;
}
.sec-eyebrow .dot{
  width:6px;
  height:6px;
  border-radius:999px;
  background:var(--brand-600);
  display:inline-block;
}
.section-heading{
  font-size:clamp(1.6rem,2.8vw,2.2rem);
  font-weight:700;
  letter-spacing:.01em;
  margin-bottom:12px;
}
.section-sub{
  color:var(--text-muted);
  font-size:16px;
  max-width:680px;
}
.section-heading-center{
  text-align:center;
}
.section-heading-center .section-sub{
  margin-left:auto;
  margin-right:auto;
}
.section-head-row{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:44px;
}
@media(max-width:767px){
  .section-head-row{
    display:block;
  }
}
.site-header{
  position:sticky;
  top:0;
  z-index:1050;
  background:rgba(255,255,255,.84);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-light);
}
.header-flex{
  display:flex;
  align-items:center;
  min-height:76px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:34px;
  height:34px;
  border-radius:10px;
  background:linear-gradient(140deg,#4165DB,#2E4FB2);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 4px 12px rgba(61,98,217,.22);
}
.brand-mark svg{
  width:18px;
  height:18px;
}
.brand-text{
  font-size:19px;
  font-weight:700;
  color:var(--text-strong);
  letter-spacing:.02em;
  white-space:nowrap;
}
.brand-text:hover{
  color:var(--brand-600);
}
.desktop-menu{
  margin-left:46px;
  display:flex;
  align-items:center;
  gap:34px;
}
.desktop-menu .nav-link-item{
  position:relative;
  display:inline-block;
  font-size:15px;
  color:var(--text-muted);
  padding:22px 0;
}
.desktop-menu .nav-link-item::after{
  content:"";
  position:absolute;
  left:0;
  bottom:10px;
  width:0;
  height:2px;
  border-radius:2px;
  background:var(--brand-600);
  transition:width .2s ease;
}
.desktop-menu .nav-link-item:hover{
  color:var(--brand-600);
}
.desktop-menu .nav-link-item:hover::after{
  width:100%;
}
.desktop-menu .nav-link-item.active{
  color:var(--brand-600);
}
.desktop-menu .nav-link-item.active::after{
  width:100%;
}
.header-actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:10px;
}
.login-link{
  font-size:15px;
  color:var(--text-body);
  font-weight:500;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 10px;
}
.login-link:hover{
  color:var(--brand-600);
}
.header-download-btn{
  padding:.55rem 1.1rem;
  border-radius:var(--radius-md);
  font-size:14px;
}
.hamburger-btn{
  all:unset;
  width:42px;
  height:42px;
  border-radius:10px;
  border:1px solid var(--line);
  display:none;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  background:var(--surface);
}
.hamburger-btn:focus-visible{
  outline:3px solid var(--brand-100);
}
.hamburger-btn svg{
  width:20px;
  height:20px;
}
.mobile-drawer{
  overflow:hidden;
}
.mobile-drawer-inner{
  display:flex;
  flex-direction:column;
  height:100%;
  padding:24px 0 36px;
}
.mobile-drawer-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:32px;
}
.mobile-close-btn{
  all:unset;
  width:40px;
  height:40px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:var(--bg-body);
  cursor:pointer;
  color:var(--text-strong);
}
.mobile-close-btn:hover{
  background:var(--brand-100);
  color:var(--brand-600);
}
.mobile-close-btn svg{
  width:18px;
  height:18px;
}
.mobile-nav-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns:1fr;
  gap:8px;
  flex:1;
}
.mobile-nav-list a{
  display:block;
  padding:14px 16px;
  border-radius:12px;
  font-size:18px;
  font-weight:600;
  color:var(--text-strong);
}
.mobile-nav-list a.active{
  background:var(--brand-50);
  color:var(--brand-600);
}
.mobile-nav-list a:not(.active):hover{
  background:var(--bg-body);
  color:var(--brand-600);
}
.mobile-drawer-actions{
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
  padding-top:24px;
  margin-top:20px;
  border-top:1px solid var(--line-light);
}
@media(min-width:992px){
  .mobile-drawer{
    display:none!important;
  }
}
@media(max-width:991px){
  .hamburger-btn{
    display:inline-flex;
  }
  .desktop-menu{
    display:none!important;
  }
  .header-actions .login-link{
    display:none!important;
  }
}
@media(max-width:991.98px){
  .mobile-drawer{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    height:100%;
    z-index:1090;
    background:var(--surface);
    overflow-y:auto;
  }
}
.hero-section{
  position:relative;
  padding:98px 0 52px;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
  background-color:var(--bg-body);
  overflow:hidden;
}
.hero-section::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(97deg,rgba(243,248,254,.98) 0%,rgba(243,248,254,.92) 44%,rgba(207,225,248,.30) 100%);
  pointer-events:none;
}
.hero-section .container{
  position:relative;
  z-index:2;
}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--brand-600);
  background:var(--brand-50);
  border:1px solid var(--brand-100);
  padding:6px 14px;
  border-radius:999px;
  font-size:13px;
  font-weight:500;
  margin-bottom:24px;
}
.hero-eyebrow .pulse{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--brand-600);
  box-shadow:0 0 0 3px rgba(61,98,217,.12);
}
.hero-title{
  font-size:clamp(2.05rem,4vw,3rem);
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.25;
  margin-bottom:24px;
  color:var(--text-strong);
}
.hero-title .highlight{
  color:var(--brand-600);
  position:relative;
}
.hero-lead{
  font-size:17px;
  color:var(--text-body);
  max-width:540px;
  margin-bottom:34px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:40px;
}
.hero-points{
  border-top:1px solid rgba(216,226,238,.8);
  margin-top:58px;
  padding-top:26px;
}
.trust-list{
  list-style:none;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  margin:0;
  padding:0;
}
.trust-item{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  color:var(--text-muted);
}
.trust-item svg{
  width:17px;
  height:17px;
  color:var(--brand-600);
}
@media(max-width:767px){
  .trust-list{
    grid-template-columns:repeat(2,1fr);
    gap:16px 18px;
  }
  .hero-section{
    padding-top:70px;
  }
}
.browser-mock{
  background:var(--surface);
  border-radius:18px;
  box-shadow:var(--shadow-3);
  border:1px solid var(--line-light);
  overflow:hidden;
  transform:translateZ(0);
  margin-left:auto;
  max-width:520px;
}
.mock-bar{
  background:var(--bg-body);
  border-bottom:1px solid var(--line-light);
  padding:12px 16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.mock-dots{
  display:flex;
  gap:6px;
}
.mock-dots i{
  width:9px;
  height:9px;
  border-radius:50%;
  display:block;
  background:#CBD5E4;
}
.mock-dots i:nth-child(1){background:#F4A9A0;}
.mock-dots i:nth-child(2){background:#F2D37C;}
.mock-dots i:nth-child(3){background:#9DC9A5;}
.mock-address{
  background:#fff;
  border:1px solid var(--line-light);
  color:var(--text-muted);
  font-size:12px;
  border-radius:6px;
  padding:4px 16px;
  display:flex;
  align-items:center;
  gap:6px;
  min-width:170px;
}
.mock-address svg{
  width:12px;
  height:12px;
  color:#7FA076;
}
.mock-body{
  background:linear-gradient(160deg,#FBFDFF,#F2F6FC);
  padding:34px 30px 28px;
}
.mock-app-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:26px;
}
.mock-app-title{
  display:flex;
  align-items:center;
  gap:8px;
}
.mock-app-title .box{
  width:28px;
  height:28px;
  background:var(--brand-600);
  border-radius:7px;
}
.mock-app-title span{
  font-size:14px;
  font-weight:700;
  color:var(--text-strong);
}
.mock-connect{
  font-size:12px;
  color:#3C9D6C;
  background:#EAF7F0;
  padding:4px 10px;
  border-radius:999px;
  display:flex;
  align-items:center;
  gap:4px;
}
.mock-connect::before{
  content:"";
  width:5px;
  height:5px;
  background:#3C9D6C;
  border-radius:50%;
}
.mock-login-card{
  background:#fff;
  border:1px solid var(--line-light);
  box-shadow:var(--shadow-2);
  border-radius:14px;
  padding:24px;
}
.mock-login-card .top{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:20px;
}
.mock-login-card .top b{
  font-size:15px;
  color:var(--text-strong);
}
.mock-login-card .top span{
  font-size:12px;
  color:var(--brand-600);
  background:var(--brand-50);
  padding:2px 8px;
  border-radius:999px;
}
.mock-input{
  border:1px solid var(--line);
  background:var(--surface-muted);
  border-radius:8px;
  height:36px;
  margin-bottom:12px;
}
.mock-input.lg{
  height:38px;
}
.mock-row{
  display:flex;
  gap:12px;
}
.mock-row .mock-input.flex{
  flex:1;
  width:auto;
}
.mock-code{
  width:92px;
  border:1px dashed var(--brand-100);
  background:var(--brand-50);
  border-radius:8px;
  height:36px;
  flex-shrink:0;
}
.mock-check{
  display:flex;
  align-items:center;
  gap:6px;
  margin:12px 0 14px;
  font-size:12px;
  color:var(--text-muted);
}
.mock-check .s{
  width:14px;
  height:14px;
  border:1px solid var(--line);
  border-radius:4px;
}
.mock-btn{
  background:var(--brand-600);
  color:#fff;
  width:100%;
  height:40px;
  border:none;
  border-radius:8px;
  font-weight:600;
  font-size:14px;
}
.mock-foot{
  text-align:center;
  color:var(--text-muted);
  font-size:12px;
  margin-top:14px;
}
.mock-foot a{
  color:var(--brand-600);
  margin:0 4px;
}
@media(max-width:991px){
  .browser-mock{
    max-width:520px;
    margin:30px auto 0;
  }
}
@media(max-width:520px){
  .mock-body{
    padding:26px 18px 20px;
  }
}
.feature-slider-wrap{
  max-width:1060px;
  margin:0 auto;
}
.showcase-window{
  background:var(--surface);
  border:1px solid var(--line-light);
  border-radius:18px;
  box-shadow:var(--shadow-3);
  overflow:hidden;
}
.window-bar{
  display:flex;
  align-items:center;
  border-bottom:1px solid var(--line-light);
  background:var(--bg-body);
  padding:12px 18px;
  gap:12px;
}
.window-bar .dots{
  display:flex;
  gap:6px;
}
.window-bar .dots i{
  width:9px;
  height:9px;
  background:#CDD9E7;
  border-radius:50%;
}
.showcase-media{
  background:var(--bg-deep);
  min-height:320px;
  overflow:hidden;
}
.showcase-media img{
  width:100%;
  height:100%;
  aspect-ratio:16/7;
  object-fit:cover;
}
.slide-caption{
  padding:28px 32px 30px;
  background:#fff;
}
.slide-caption h3{
  font-size:20px;
  font-weight:700;
  margin-bottom:8px;
}
.slide-caption p{
  margin:0;
  color:var(--text-muted);
  max-width:720px;
}
@media(max-width:767px){
  .showcase-media{
    min-height:200px;
  }
  .showcase-media img{
    aspect-ratio:16/9;
  }
  .slide-caption{
    padding:20px 18px 22px;
  }
}
.feature-carousel{
  position:relative;
}
.feature-carousel .carousel-indicators{
  position:static;
  margin:28px 0 0;
  display:flex;
  justify-content:center;
  align-items:center;
  gap:8px;
}
.feature-carousel .carousel-indicators [data-bs-target]{
  width:7px;
  height:7px;
  background:var(--line);
  border:none;
  border-radius:999px;
  opacity:1;
  margin:0;
  transition:all .2s ease;
}
.feature-carousel .carousel-indicators .active{
  width:24px;
  background:var(--brand-600);
}
.feature-carousel .carousel-control-prev,
.feature-carousel .carousel-control-next{
  width:38px;
  height:38px;
  border-radius:50%;
  background:var(--surface);
  box-shadow:var(--shadow-2);
  top:34%;
  transform:translateY(-50%);
  right:-16px;
  left:auto;
  opacity:1;
  border:1px solid var(--line-light);
}
.feature-carousel .carousel-control-prev{
  left:-16px;
}
.feature-carousel .carousel-control-prev-icon,
.feature-carousel .carousel-control-next-icon{
  filter:invert(38%) sepia(34%) saturate(2200%) hue-rotate(201deg) brightness(96%) contrast(95%);
}
@media(max-width:767px){
  .feature-carousel .carousel-control-prev,
  .feature-carousel .carousel-control-next{
    display:none;
  }
}
.feature-note-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
  margin-top:40px;
}
@media(max-width:767px){
  .feature-note-grid{
    grid-template-columns:1fr;
  }
}
.feature-note-card{
  background:var(--surface);
  border-radius:14px;
  padding:28px;
  box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.feature-note-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-2);
}
.feature-note-card .icon{
  width:38px;
  height:38px;
  border-radius:10px;
  background:var(--brand-50);
  color:var(--brand-600);
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:16px;
}
.feature-note-card .icon svg{
  width:19px;
  height:19px;
}
.feature-note-card h3{
  font-size:17px;
  color:var(--text-strong);
  margin-bottom:8px;
  font-weight:650;
}
.feature-note-card p{
  margin:0;
  color:var(--text-muted);
  font-size:14px;
}
.sys-row{
  display:flex;
  align-items:center;
  gap:52px;
}
.sys-intro{
  flex:1 1 42%;
}
.sys-grid{
  flex:1 1 58%;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
@media(max-width:991px){
  .sys-row{
    flex-direction:column;
    gap:36px;
  }
  .sys-grid{
    flex:1 1 auto;
    width:100%;
  }
}
@media(max-width:520px){
  .sys-grid{
    grid-template-columns:1fr;
  }
}
.sys-card{
  background:var(--surface);
  border:1px solid var(--line-light);
  border-radius:16px;
  padding:24px;
  box-shadow:var(--shadow-1);
  transition:border-color .2s ease, box-shadow .2s ease;
}
.sys-card:hover{
  border-color:var(--brand-100);
  box-shadow:var(--shadow-2);
}
.sys-card .brand-badge{
  font-size:12px;
  font-weight:500;
  padding:3px 10px;
  border-radius:999px;
  background:var(--brand-50);
  color:var(--brand-600);
  border:1px solid var(--brand-100);
}
.sys-card h3{
  font-size:18px;
  margin:12px 0 6px;
}
.sys-card p{
  margin:0;
  color:var(--text-muted);
  font-size:14px;
  line-height:1.7;
}
.feedback-wrap{
  display:grid;
  grid-template-columns:42% 58%;
  gap:32px;
  align-items:stretch;
}
.rating-card{
  background:linear-gradient(150deg,var(--surface),var(--brand-50));
  border:1px solid var(--brand-100);
  border-radius:20px;
  padding:36px;
  box-shadow:var(--shadow-2);
  display:flex;
  flex-direction:column;
}
.rating-card h3{
  font-size:20px;
  font-weight:700;
  margin-bottom:6px;
}
.rating-score{
  font-size:15px;
  color:var(--text-body);
  margin-bottom:12px;
}
.rating-score strong{
  font-size:26px;
  color:var(--text-strong);
}
.rating-stars{
  display:flex;
  gap:3px;
  align-items:center;
  margin-bottom:18px;
}
.rating-stars svg{
  width:18px;
  height:18px;
  fill:var(--accent);
}
.rating-points{
  list-style:none;
  margin:auto 0 0;
  padding:18px 0 0;
  border-top:1px solid var(--brand-100);
  display:grid;
  gap:8px;
}
.rating-points li{
  display:flex;
  gap:8px;
  color:var(--text-muted);
  font-size:14px;
}
.rating-points svg{
  width:16px;
  height:16px;
  flex-shrink:0;
  color:var(--brand-600);
}
.feedback-notes{
  display:grid;
  grid-template-columns:1fr 1fr;
  grid-template-rows:auto auto;
  gap:18px;
}
.feedback-note{
  background:var(--surface);
  border-radius:16px;
  padding:28px;
  box-shadow:var(--shadow-1);
  font-size:15px;
  color:var(--text-body);
}
.feedback-note .tag{
  display:inline-block;
  color:var(--brand-600);
  font-size:13px;
  background:var(--brand-50);
  border-radius:999px;
  padding:3px 12px;
  margin-bottom:14px;
}
.feedback-note p{
  margin:0;
}
.feedback-note.wide{
  grid-column:span 2;
}
@media(max-width:991px){
  .feedback-wrap{
    grid-template-columns:1fr;
  }
  .feedback-notes{
    grid-template-columns:1fr;
  }
  .feedback-note.wide{
    grid-column:auto;
  }
}
@media(max-width:520px){
  .feedback-notes{
    display:grid;
  }
}
.download-area{
  background:linear-gradient(rgba(231,237,246,.92),rgba(243,248,253,.94)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  background-attachment:scroll;
}
.download-panel{
  background:var(--surface);
  border-radius:24px;
  box-shadow:var(--shadow-3);
  padding:clamp(28px,4vw,58px);
  position:relative;
  overflow:hidden;
}
.download-panel::before{
  content:"";
  position:absolute;
  right:-100px;
  top:-100px;
  width:220px;
  height:220px;
  border-radius:50%;
  background:var(--brand-50);
}
.download-panel::after{
  content:"";
  position:absolute;
  right:36px;
  bottom:36px;
  width:120px;
  height:120px;
  background-image:radial-gradient(var(--star-dot) 1px,transparent 1px);
  background-size:14px 14px;
  opacity:.35;
  pointer-events:none;
}
.download-panel .content{
  position:relative;
  z-index:2;
}
.download-head-sm{
  font-size:14px;
  color:var(--brand-600);
  background:var(--brand-50);
  display:inline-flex;
  padding:4px 12px;
  border-radius:999px;
  margin-bottom:14px;
}
.download-panel h2{
  font-size:clamp(1.65rem,3vw,2.2rem);
  font-weight:700;
  line-height:1.4;
}
.download-panel .lead{
  color:var(--text-muted);
  max-width:640px;
}
.platform-cards-wrap{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:22px;
  margin-top:34px;
}
@media(max-width:767px){
  .platform-cards-wrap{
    grid-template-columns:1fr;
  }
}
.platform-card{
  border:1px solid var(--line);
  border-radius:18px;
  padding:30px;
  background:linear-gradient(180deg,#FFFFFF,#F8FAFE);
  transition:all .2s ease;
}
.platform-card:hover{
  border-color:var(--brand-100);
  box-shadow:var(--shadow-2);
  transform:translateY(-2px);
}
.platform-card .plat-name{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:12px;
}
.platform-card .plat-ico{
  width:43px;
  height:43px;
  border-radius:12px;
  background:var(--brand-600);
  color:#fff;
  font-size:14px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
}
.platform-card .plat-ico.light{
  background:var(--brand-100);
  color:var(--brand-700);
}
.platform-card h3{
  font-size:18px;
  margin:0;
}
.platform-card p{
  color:var(--text-muted);
  font-size:14px;
  margin-bottom:18px;
}
.aux-download-line{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 20px;
  margin-top:22px;
  font-size:14px;
  color:var(--text-muted);
}
.aux-download-line a{
  color:var(--brand-600);
}
.seal-note{
  display:flex;
  align-items:center;
  gap:8px;
  color:var(--text-muted);
  font-size:13px;
  margin-top:22px;
  background:var(--brand-50);
  border-radius:10px;
  padding:10px 14px;
  max-width:620px;
}
.seal-note svg{
  width:15px;
  height:15px;
  color:var(--brand-600);
  flex-shrink:0;
}
.login-quick-card{
  margin-top:28px;
  display:flex;
  align-items:center;
  gap:24px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:var(--shadow-2);
  padding:30px;
}
.login-quick-icon{
  width:54px;
  height:54px;
  border-radius:50%;
  background:var(--brand-50);
  border:1px solid var(--brand-100);
  color:var(--brand-600);
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.login-quick-icon svg{
  width:24px;
  height:24px;
}
.login-quick-copy{
  flex:1;
}
.login-quick-copy h3{
  font-size:18px;
  margin-bottom:6px;
}
.login-quick-copy p{
  color:var(--text-muted);
  margin:0;
  font-size:14px;
  max-width:600px;
}
@media(max-width:767px){
  .login-quick-card{
    align-items:flex-start;
    flex-direction:column;
    gap:18px;
    padding:24px;
  }
  .login-quick-copy p{
    margin-bottom:12px;
  }
}
.news-empty{
  border:1.5px dashed var(--line);
  border-radius:18px;
  background:var(--surface);
  max-width:520px;
  margin:0 auto;
  text-align:center;
  padding:46px 28px;
  color:var(--text-muted);
}
.news-empty .empty-icon{
  width:52px;
  height:52px;
  margin:0 auto 16px;
  border-radius:16px;
  background:var(--bg-body);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--brand-600);
}
.news-empty h3{
  font-size:17px;
  font-weight:600;
  color:var(--text-strong);
  margin-bottom:8px;
}
.news-empty p{
  margin:0;
  font-size:14px;
}
.news-list-card{
  height:100%;
  background:var(--surface);
  border-radius:16px;
  border:1px solid var(--line-light);
  box-shadow:var(--shadow-1);
  padding:26px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  display:flex;
  flex-direction:column;
}
.news-list-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-3);
  border-color:var(--brand-100);
}
.news-tag{
  display:inline-block;
  font-size:12px;
  width:fit-content;
  color:var(--brand-700);
  background:var(--brand-100);
  border-radius:999px;
  padding:3px 11px;
  margin-bottom:14px;
}
.news-list-card h3{
  font-size:17px;
  font-weight:650;
  line-height:1.55;
  margin-bottom:10px;
}
.news-list-card h3 a{
  color:var(--text-strong);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-list-card h3 a:hover{
  color:var(--brand-600);
}
.news-list-card .abstract{
  color:var(--text-muted);
  font-size:14px;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:18px;
  flex:1;
}
.news-list-card .meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
  color:var(--text-muted);
  padding-top:16px;
  border-top:1px solid var(--line-light);
}
.news-list-card .more{
  color:var(--brand-600);
  font-size:13px;
}
.news-list-card .more:hover{
  color:var(--brand-700);
}
.faq-accordion{
  max-width:820px;
  margin:0 auto;
}
.faq-accordion .accordion-item{
  background:transparent;
  border:0;
  border-bottom:1px solid var(--line-light);
  border-radius:0;
}
.faq-accordion .accordion-item:last-child{
  border-bottom:none;
}
.faq-accordion .accordion-button{
  background:transparent;
  box-shadow:none;
  color:var(--text-strong);
  font-size:16px;
  font-weight:600;
  padding:26px 8px;
  line-height:1.6;
  transition:color .2s ease;
}
.faq-accordion .accordion-button:not(.collapsed){
  color:var(--brand-600);
  box-shadow:none;
}
.faq-accordion .accordion-button:focus{
  border:none;
  box-shadow:none;
  outline:3px solid var(--brand-100);
  border-radius:8px;
}
.faq-accordion .accordion-button::after{
  content:"+";
  background-image:none;
  width:22px;
  height:22px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:22px;
  font-weight:400;
  color:var(--text-muted);
  transform:none;
  transition:transform .25s ease,color .2s ease;
}
.faq-accordion .accordion-button:not(.collapsed)::after{
  transform:rotate(45deg);
  color:var(--brand-600);
}
.faq-accordion .accordion-body{
  padding:0 34px 30px 8px;
  color:var(--text-body);
  font-size:15px;
  line-height:1.85;
}
.faq-accordion .accordion-body p:last-child{
  margin:0;
}
.cta-card{
  background:var(--surface);
  border-radius:22px;
  box-shadow:var(--shadow-3);
  background-image:radial-gradient(circle at 85% 20%,var(--brand-50),transparent 38%);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  padding:clamp(34px,4vw,54px);
}
.cta-card h2{
  font-size:clamp(1.5rem,2.6vw,2.05rem);
  font-weight:700;
  margin-bottom:8px;
}
.cta-card p{
  margin:0;
  color:var(--text-muted);
  max-width:620px;
}
.cta-card .cta-actions{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
}
.site-footer{
  background:#15233B;
  color:#AFC0D4;
  font-size:14px;
}
.footer-main{
  padding:68px 0 48px;
}
.footer-grid{
  display:grid;
  grid-template-columns:2.2fr 1fr 1fr 1fr;
  gap:42px;
}
@media(max-width:991px){
  .footer-grid{
    grid-template-columns:1fr 1fr;
  }
}
@media(max-width:520px){
  .footer-grid{
    grid-template-columns:1fr;
    gap:34px;
  }
}
.footer-brand{
  max-width:340px;
}
.footer-brand .brand-text{
  color:#fff;
  font-size:20px;
  display:block;
  margin-bottom:14px;
}
.footer-brand p{
  color:#AFC0D4;
  margin-bottom:18px;
  line-height:1.8;
}
.footer-brand .brand-mark{
  width:32px;
  height:32px;
  background:var(--brand-600);
}
.footer-title{
  color:#fff;
  font-size:15px;
  font-weight:700;
  letter-spacing:.03em;
  margin-bottom:18px;
}
.footer-link-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:10px;
}
.footer-link-list a{
  color:#AFC0D4;
  display:inline-flex;
  align-items:center;
  gap:5px;
}
.footer-link-list a:hover{
  color:#fff;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.09);
  padding:20px 0 24px;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px 24px;
  color:#8FA4BC;
  font-size:13px;
}
.footer-bottom a{
  color:#B9C8DC;
}
.footer-bottom a:hover{
  color:#fff;
}
:focus-visible{
  outline:3px solid var(--brand-100);
  outline-offset:2px;
}
@media(max-width:767px){
  .section{
    padding:64px 0;
  }
  .header-actions .btn-brand.header-download-btn{
    padding:.5rem .8rem;
  }
  .brand-text{
    font-size:17px;
  }
  .brand-mark{
    width:31px;
    height:31px;
  }
  .hero-lead{
    font-size:16px;
  }
  .hero-actions .btn{
    width:100%;
    margin-bottom:0;
  }
}

/* roulang page: category1 */
:root {
      --bg-body: #F3F6FB;
      --bg-deep: #E7EDF6;
      --surface: #FFFFFF;
      --surface-muted: #F8FAFE;

      --brand-600: #3D62D9;
      --brand-700: #3151B5;
      --brand-100: #E5ECFA;
      --brand-50: #F1F5FE;

      --accent: #F2A93B;
      --star-dot: #9DB6E4;

      --text-strong: #1B2738;
      --text-body: #3F4D62;
      --text-muted: #6B7B93;
      --line: #D9E1EE;
      --line-light: #E8EEF7;
      --footer-bg: #15233B;
      --footer-text: #A9B7CE;

      --radius-md: 8px;
      --radius-lg: 16px;
      --radius-xl: 24px;
      --shadow-1: 0 2px 8px rgba(40,66,105,.05);
      --shadow-2: 0 6px 18px rgba(40,66,105,.08);
      --shadow-3: 0 16px 40px rgba(40,66,105,.12);
      --container-w: 1200px;
      --header-w: 1280px;
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
    }

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

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

    body {
      margin: 0;
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.75;
      color: var(--text-body);
      background: var(--bg-body);
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, h5, h6 {
      margin: 0;
      color: var(--text-strong);
      line-height: 1.3;
      letter-spacing: -0.01em;
    }

    p {
      margin: 0 0 16px;
    }

    ul, ol {
      margin: 0;
      padding: 0;
      list-style: none;
    }

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

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

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

    a:focus-visible, button:focus-visible, input:focus-visible {
      outline: 3px solid var(--brand-100);
      outline-offset: 2px;
    }

    .container, .container-fluid, .container-lg, .container-md, .container-sm {
      width: 100%;
      max-width: var(--container-w);
    }

    .container.header-wide {
      max-width: var(--header-w);
    }

    .section {
      padding: 96px 0;
    }

    .section-head {
      max-width: 780px;
      margin-bottom: 56px;
    }

    .section-head.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .section-head h2 {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .section-head p {
      font-size: 16px;
      color: var(--text-muted);
      margin-bottom: 0;
    }

    .eyebrow, .overline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      background: var(--brand-50);
      border: 1px solid var(--brand-100);
      border-radius: 999px;
      font-size: 13px;
      font-weight: 500;
      color: var(--brand-600);
      letter-spacing: .02em;
      margin-bottom: 18px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 26px;
      border-radius: var(--radius-md);
      border: 1px solid transparent;
      font-size: 15px;
      font-weight: 600;
      line-height: 1.5;
      text-align: center;
      white-space: nowrap;
      transition: background-color .2s ease, border-color .2s ease, color .2s ease, box-shadow .2s ease, transform .2s ease;
    }

    .btn-brand {
      color: #FFFFFF;
      background: var(--brand-600);
      border-color: var(--brand-600);
      box-shadow: var(--shadow-1);
    }

    .btn-brand:hover, .btn-brand:active {
      color: #FFFFFF !important;
      background: var(--brand-700);
      border-color: var(--brand-700);
      box-shadow: var(--shadow-3);
      transform: translateY(-2px);
    }

    .btn-outline {
      color: var(--text-strong);
      background: var(--surface);
      border-color: var(--line);
    }

    .btn-outline:hover {
      color: var(--brand-600);
      border-color: var(--brand-600);
      background: var(--surface);
      transform: translateY(-2px);
      box-shadow: var(--shadow-2);
    }

    .btn-lg {
      padding: 14px 34px;
      font-size: 16px;
    }

    .header-download-btn {
      min-height: 42px;
      padding: 9px 18px;
    }

    .text-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      margin-top: 18px;
      color: var(--brand-600);
      font-weight: 600;
      font-size: 15px;
      transition: gap .2s ease;
    }

    .text-link:hover {
      color: var(--brand-700);
    }

    .text-link svg {
      width: 16px;
      height: 16px;
      transition: transform .2s ease;
    }

    .text-link:hover svg {
      transform: translateX(4px);
    }

    /* Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, .88);
      -webkit-backdrop-filter: blur(14px);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--line-light);
    }

    .header-flex {
      display: flex;
      align-items: center;
      gap: 18px;
      min-height: 88px;
      padding: 18px 0;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--text-strong);
      font-weight: 700;
      font-size: 19px;
      letter-spacing: .01em;
    }

    .brand-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      background: var(--brand-50);
      border: 1px solid var(--brand-100);
      border-radius: 12px;
      color: var(--brand-600);
    }

    .brand-mark svg {
      width: 20px;
      height: 20px;
    }

    .brand-text {
      line-height: 1.2;
    }

    .desktop-menu {
      display: flex;
      align-items: center;
      gap: 30px;
      margin: 0 12px 0 36px;
    }

    .nav-link-item {
      position: relative;
      display: inline-block;
      padding: 10px 2px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-body);
      transition: color .2s ease;
    }

    .nav-link-item::after {
      content: "";
      position: absolute;
      left: 50%;
      bottom: -4px;
      width: 0;
      height: 2px;
      border-radius: 2px;
      background: var(--brand-600);
      transform: translateX(-50%);
      opacity: 0;
      transition: width .2s ease, opacity .2s ease;
    }

    .nav-link-item:hover {
      color: var(--brand-600);
    }

    .nav-link-item:hover::after {
      width: 16px;
      opacity: .7;
    }

    .nav-link-item.active {
      color: var(--text-strong);
      font-weight: 600;
    }

    .nav-link-item.active::after {
      width: 20px;
      opacity: 1;
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-left: auto;
    }

    .login-link {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 7px;
      padding: 9px 14px;
      border-radius: var(--radius-md);
      color: var(--text-strong);
      font-size: 14px;
      font-weight: 600;
      transition: color .2s ease, background-color .2s ease;
    }

    .login-link:hover {
      color: var(--brand-600);
      background: var(--brand-50);
    }

    .login-link svg {
      width: 17px;
      height: 17px;
    }

    .download-short {
      display: none;
    }

    .hamburger-btn {
      display: none;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      background: #FFFFFF;
      border: 1px solid var(--line);
      border-radius: 10px;
      color: var(--text-strong);
      cursor: pointer;
      transition: border-color .2s ease, background-color .2s ease;
    }

    .hamburger-btn:hover {
      border-color: var(--brand-600);
      color: var(--brand-600);
    }

    .hamburger-btn svg {
      width: 22px;
      height: 22px;
    }

    .mobile-close-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      background: #FFFFFF;
      border: 1px solid var(--line);
      border-radius: 10px;
      color: var(--text-strong);
      cursor: pointer;
    }

    .mobile-close-btn svg {
      width: 22px;
      height: 22px;
    }

    /* Mobile drawer */
    .mobile-drawer.collapse:not(.show) {
      display: none;
    }

    .mobile-drawer-inner {
      display: flex;
      flex-direction: column;
      min-height: 320px;
    }

    .mobile-drawer-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 20px;
    }

    .mobile-nav-list a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 2px;
      border-bottom: 1px solid var(--line-light);
      font-size: 18px;
      font-weight: 500;
      color: var(--text-strong);
      transition: color .2s ease;
    }

    .mobile-nav-list a:hover {
      color: var(--brand-600);
    }

    .mobile-nav-list a.active {
      color: var(--brand-600);
      font-weight: 600;
    }

    /* Page hero */
    .page-hero {
      position: relative;
      padding: 104px 0 96px;
      overflow: hidden;
    }

    .page-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.png');
      background-position: center;
      background-repeat: no-repeat;
      background-size: cover;
      opacity: .22;
      z-index: 0;
    }

    .page-hero::after {
      content: "";
      position: absolute;
      right: -140px;
      top: -180px;
      width: 420px;
      height: 420px;
      background: radial-gradient(circle, rgba(61, 98, 217, .12) 0%, rgba(61, 98, 217, 0) 70%);
      z-index: 0;
      pointer-events: none;
    }

    .page-hero .container {
      position: relative;
      z-index: 2;
    }

    .breadcrumb-nav {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 28px;
    }

    .breadcrumb-nav a {
      color: var(--text-muted);
      transition: color .2s ease;
    }

    .breadcrumb-nav a:hover {
      color: var(--brand-600);
    }

    .page-hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.08fr) minmax(380px, .82fr);
      gap: 72px;
      align-items: center;
    }

    .page-hero-copy {
      max-width: 820px;
    }

    .page-hero-copy h1 {
      font-size: 44px;
      line-height: 1.28;
      font-weight: 700;
      margin-bottom: 24px;
    }

    .page-hero-copy .lead {
      font-size: 18px;
      line-height: 1.8;
      color: var(--text-body);
      margin-bottom: 34px;
      max-width: 680px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .hero-status-card {
      background: rgba(255, 255, 255, .86);
      border: 1px solid var(--line-light);
      border-radius: 20px;
      box-shadow: var(--shadow-2);
      padding: 28px;
    }

    .hero-status-title {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-bottom: 18px;
      border-bottom: 1px solid var(--line-light);
      margin-bottom: 12px;
      color: var(--text-strong);
      font-weight: 600;
      font-size: 15px;
    }

    .official-tag {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      color: var(--brand-600);
      font-size: 12px;
      font-weight: 600;
    }

    .status-list {
      margin-top: 14px;
    }

    .status-list-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 12px 0;
      border-bottom: 1px dashed var(--line-light);
    }

    .status-list-item:last-child {
      border-bottom: 0;
      padding-bottom: 0;
    }

    .status-dot {
      width: 8px;
      height: 8px;
      flex: none;
      margin-top: 9px;
      border-radius: 50%;
      background: #57BB8A;
    }

    .status-list-item strong {
      display: block;
      color: var(--text-strong);
      font-size: 14.5px;
      font-weight: 600;
    }

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

    /* Feature showcase */
    .feature-showcase {
      background: var(--surface);
      padding: 64px 0 48px;
    }

    .showcase-row {
      display: flex;
      align-items: center;
      gap: 80px;
      padding: 72px 0;
      border-bottom: 1px solid var(--line-light);
    }

    .showcase-row:first-child {
      border-top: 0;
    }

    .showcase-row.flip {
      flex-direction: row-reverse;
    }

    .showcase-copy {
      flex: 0 0 50%;
      padding-right: 20px;
    }

    .showcase-row.flip .showcase-copy {
      padding-right: 0;
      padding-left: 20px;
    }

    .showcase-media {
      flex: 1 1 50%;
      min-width: 0;
    }

    .feature-tag {
      display: inline-flex;
      align-items: center;
      padding: 6px 14px;
      border-radius: 999px;
      background: var(--brand-100);
      color: var(--brand-700);
      font-size: 13px;
      font-weight: 500;
      margin-bottom: 16px;
    }

    .showcase-copy h3 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .showcase-copy p {
      color: var(--text-body);
      font-size: 16px;
      margin-bottom: 22px;
    }

    .feature-list {
      margin-top: 8px;
    }

    .feature-list li {
      position: relative;
      padding-left: 30px;
      margin-bottom: 12px;
      color: var(--text-body);
      font-size: 15px;
    }

    .feature-list li::before {
      content: "";
      position: absolute;
      left: 0;
      top: 7px;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%233D62D9' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E");
      background-size: 10px;
      background-position: center;
      background-repeat: no-repeat;
      background-color: var(--brand-50);
    }

    .browser-card {
      background: #FFFFFF;
      border: 1px solid var(--line-light);
      border-radius: 20px;
      overflow: hidden;
      box-shadow: var(--shadow-2);
    }

    .browser-top {
      display: flex;
      align-items: center;
      gap: 6px;
      height: 38px;
      padding: 0 16px;
      border-bottom: 1px solid var(--line-light);
      background: var(--surface-muted);
    }

    .browser-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--line);
    }

    .browser-dot:first-child {
      background: #F6A6A6;
    }

    .browser-dot:nth-child(2) {
      background: #F2D78A;
    }

    .browser-dot:nth-child(3) {
      background: #A7D8B0;
    }

    .browser-url {
      margin-left: 12px;
      color: var(--text-muted);
      font-size: 12px;
      background: var(--bg-body);
      border-radius: 6px;
      padding: 3px 12px;
      display: inline-block;
    }

    .browser-media img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
    }

    /* Scene guide */
    .scene-guide {
      background: var(--bg-body);
      padding: 104px 0;
    }

    .scene-grid {
      display: grid;
      grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
      gap: 72px;
      align-items: start;
    }

    .scene-intro {
      position: sticky;
      top: 140px;
    }

    .scene-intro h2 {
      font-size: 32px;
      line-height: 1.34;
      margin-bottom: 18px;
    }

    .scene-intro p {
      color: var(--text-muted);
      font-size: 16px;
      margin-bottom: 0;
    }

    .scene-item {
      display: grid;
      grid-template-columns: 68px 1fr;
      gap: 24px;
      padding: 28px 0;
      border-bottom: 1px solid var(--line-light);
    }

    .scene-item:first-child {
      border-top: 1px solid var(--line-light);
    }

    .scene-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 48px;
      height: 48px;
      border: 1px solid var(--brand-100);
      border-radius: 50%;
      background: var(--surface);
      color: var(--brand-600);
      font-weight: 700;
      font-size: 14px;
    }

    .scene-item h3 {
      font-size: 19px;
      font-weight: 600;
      margin-bottom: 8px;
    }

    .scene-item p {
      color: var(--text-muted);
      font-size: 15px;
      margin-bottom: 0;
      max-width: 58ch;
    }

    /* Workflow */
    .workflow-section {
      background: var(--surface);
      padding: 104px 0;
    }

    .workflow-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 56px;
    }

    .workflow-step {
      position: relative;
      border-top: 2px solid var(--brand-100);
      padding: 28px 22px 16px 0;
      transition: transform .2s ease;
    }

    .workflow-step:nth-child(even) {
      transform: translateY(18px);
    }

    .workflow-step:hover {
      transform: translateY(2px);
    }

    .workflow-step:hover:nth-child(even) {
      transform: translateY(20px);
    }

    .workflow-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 30px;
      height: 30px;
      border-radius: 50%;
      background: var(--brand-600);
      color: #FFFFFF;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .workflow-step h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 10px;
    }

    .workflow-step p {
      color: var(--text-muted);
      font-size: 14.5px;
      margin-bottom: 0;
    }

    /* FAQ */
    .faq-section {
      background: var(--bg-body);
      padding: 104px 0;
    }

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

    .faq-accordion-item {
      border-bottom: 1px solid var(--line);
    }

    .faq-accordion-item:first-child {
      border-top: 1px solid var(--line);
    }

    .faq-question {
      margin: 0;
    }

    .faq-question button {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      width: 100%;
      padding: 22px 4px;
      background: transparent;
      border: 0;
      text-align: left;
      color: var(--text-strong);
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      transition: color .2s ease;
    }

    .faq-question button:hover {
      color: var(--brand-600);
    }

    .faq-icon {
      position: relative;
      flex: none;
      width: 20px;
      height: 20px;
    }

    .faq-icon::before,
    .faq-icon::after {
      content: "";
      position: absolute;
      background: var(--text-muted);
      border-radius: 2px;
      transition: background-color .2s ease, transform .3s ease;
    }

    .faq-icon::before {
      left: 50%;
      top: 3px;
      width: 2px;
      height: 14px;
      transform: translateX(-50%);
    }

    .faq-icon::after {
      left: 3px;
      top: 50%;
      width: 14px;
      height: 2px;
      transform: translateY(-50%);
    }

    .faq-question button:not(.collapsed) .faq-icon {
      transform: rotate(45deg);
    }

    .faq-question button:not(.collapsed) .faq-icon::before,
    .faq-question button:not(.collapsed) .faq-icon::after {
      background: var(--brand-600);
    }

    .faq-answer {
      padding: 0 36px 24px 4px;
    }

    .faq-answer p {
      color: var(--text-body);
      font-size: 15px;
      line-height: 1.85;
      margin-bottom: 0;
    }

    /* CTA Band */
    .cta-section {
      background: var(--bg-body);
      padding: 40px 0 110px;
    }

    .cta-panel {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 48px;
      background: var(--surface);
      border: 1px solid var(--line-light);
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-1);
      padding: 56px;
    }

    .cta-copy {
      max-width: 620px;
    }

    .cta-copy h2 {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .cta-copy p {
      color: var(--text-muted);
      font-size: 15px;
      margin-bottom: 0;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      justify-content: flex-end;
    }

    /* Footer */
    .site-footer {
      background: var(--footer-bg);
      color: var(--footer-text);
      padding: 72px 0 28px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 56px;
    }

    .footer-brand {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
    }

    .footer-brand .brand-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 38px;
      height: 38px;
      border-radius: 12px;
      background: rgba(255, 255, 255, .1);
      border-color: rgba(255, 255, 255, .14);
      color: #FFFFFF;
    }

    .footer-brand .brand-text {
      color: #FFFFFF;
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .footer-brand p {
      color: #8DA0BD;
      font-size: 14px;
      line-height: 1.8;
      margin-bottom: 22px;
      max-width: 340px;
    }

    .footer-title {
      color: #FFFFFF;
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 18px;
    }

    .footer-link-list li {
      margin-bottom: 10px;
    }

    .footer-link-list a {
      color: var(--footer-text);
      font-size: 14px;
      transition: color .2s ease;
    }

    .footer-link-list a:hover {
      color: #FFFFFF;
    }

    .footer-bottom {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, .1);
      padding-top: 26px;
      margin-top: 56px;
      color: #8194B0;
      font-size: 13px;
    }

    /* Responsive */
    @media (max-width: 1199.98px) {
      .page-hero-grid {
        gap: 40px;
        grid-template-columns: minmax(0, 1fr) 400px;
      }

      .showcase-row {
        gap: 40px;
      }

      .scene-grid {
        gap: 40px;
      }

      .cta-panel {
        padding: 40px;
      }

      .footer-grid {
        gap: 40px;
      }
    }

    @media (max-width: 991.98px) {
      .desktop-menu,
      .header-actions .login-link {
        display: none !important;
      }

      .hamburger-btn {
        display: inline-flex;
      }

      .mobile-drawer.show {
        position: fixed;
        inset: 0;
        z-index: 2000;
        background: #FFFFFF;
        overflow-y: auto;
        padding: 0;
        display: flex !important;
        flex-direction: column;
      }

      .mobile-drawer-inner {
        width: 100%;
        padding: 22px 24px 40px;
      }

      .page-hero {
        padding: 80px 0 72px;
      }

      .page-hero-grid {
        grid-template-columns: 1fr;
        gap: 44px;
      }

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

      .hero-status-card {
        max-width: 620px;
      }

      .showcase-row,
      .showcase-row.flip {
        flex-direction: column;
        align-items: flex-start;
        gap: 32px;
        padding: 52px 0;
      }

      .showcase-copy,
      .showcase-row.flip .showcase-copy {
        flex: none;
        width: 100%;
        padding: 0;
      }

      .showcase-media {
        width: 100%;
        max-width: 620px;
      }

      .scene-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }

      .scene-intro {
        position: static;
      }

      .scene-item h3 {
        font-size: 18px;
      }

      .workflow-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
      }

      .workflow-step:nth-child(even) {
        transform: translateY(0);
      }

      .workflow-step:hover:nth-child(even) {
        transform: translateY(2px);
      }

      .cta-panel {
        flex-direction: column;
        align-items: flex-start;
        padding: 32px;
      }

      .cta-actions {
        justify-content: flex-start;
      }

      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
      }
    }

    @media (max-width: 767.98px) {
      body {
        font-size: 15px;
      }

      .section,
      .scene-guide,
      .workflow-section,
      .faq-section {
        padding: 66px 0;
      }

      .section-head {
        margin-bottom: 32px;
      }

      .section-head h2 {
        font-size: 24px;
      }

      .header-flex {
        min-height: 72px;
        padding: 14px 0;
        gap: 12px;
      }

      .brand-text,
      .footer-brand .brand-text {
        font-size: 17px;
      }

      .brand-mark {
        width: 36px;
        height: 36px;
      }

      .header-download-btn {
        padding: 9px 14px;
      }

      .download-full {
        display: none;
      }

      .download-short {
        display: inline;
      }

      .page-hero {
        padding: 56px 0 60px;
      }

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

      .page-hero-copy .lead {
        font-size: 16px;
        margin-bottom: 26px;
      }

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

      .hero-status-card {
        padding: 20px;
      }

      .showcase-copy h3 {
        font-size: 21px;
      }

      .scene-grid {
        gap: 16px;
      }

      .scene-item {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 24px 0;
      }

      .scene-num {
        width: 38px;
        height: 38px;
      }

      .workflow-grid {
        grid-template-columns: 1fr;
        gap: 8px;
      }

      .workflow-step {
        padding: 22px 0 14px;
      }

      .faq-wrapper {
        margin-top: 24px;
      }

      .faq-question button {
        padding: 18px 2px;
        font-size: 15px;
      }

      .faq-answer {
        padding-right: 0;
        padding-left: 0;
      }

      .cta-section {
        padding-bottom: 64px;
      }

      .cta-panel {
        padding: 24px;
      }

      .cta-copy h2 {
        font-size: 23px;
      }

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

      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }

/* roulang page: article */
:root{
  --bg-body:#F3F6FB;
  --bg-deep:#E7EDF6;
  --surface:#FFFFFF;
  --surface-muted:#F8FAFE;

  --brand-600:#3D62D9;
  --brand-700:#3151B5;
  --brand-100:#E5ECFA;
  --brand-50:#F1F5FE;

  --accent:#F2A93B;
  --star-dot:#9DB6E4;

  --text-strong:#1B2738;
  --text-body:#3F4D62;
  --text-muted:#6B7B93;
  --line:#D9E1EE;
  --line-light:#E8EEF7;

  --footer-bg:#15233B;
  --footer-text:#92A6C6;
  --footer-heading:#F5F8FD;
  --footer-border:rgba(255,255,255,.10);
  --footer-copy:#7287A5;

  --shadow-1:0 2px 8px rgba(40,66,105,.05);
  --shadow-2:0 6px 18px rgba(40,66,105,.08);
  --shadow-3:0 16px 40px rgba(40,66,105,.12);
  --shadow-4:0 22px 54px rgba(40,66,105,.13);

  --radius-md:8px;
  --radius-lg:16px;
  --radius-xl:24px;

  --font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--bg-body);
  color:var(--text-body);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;vertical-align:middle;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;}

.container{
  width:100%;
  max-width:1200px;
  margin-left:auto;
  margin-right:auto;
  padding-left:20px;
  padding-right:20px;
}
.header-wide{max-width:1280px;}
.anchor-target{position:relative;top:-90px;display:block;height:0;overflow:hidden;visibility:hidden;}

/* Header */
.site-header{
  position:sticky;
  top:0;
  z-index:1050;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-light);
}
.header-flex{
  display:flex;
  align-items:center;
  min-height:72px;
  gap:14px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:6px 2px;
  flex-shrink:0;
}
.brand-mark{
  display:inline-flex;
  color:var(--brand-600);
  width:28px;
  height:28px;
}
.brand-mark svg{width:100%;height:100%;}
.brand-text{
  font-size:17px;
  font-weight:700;
  color:var(--text-strong);
  letter-spacing:.01em;
  white-space:nowrap;
}
.desktop-menu{
  display:flex;
  align-items:center;
  gap:2px;
  margin-left:14px;
}
.nav-link-item{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:27px 13px 25px;
  font-size:15px;
  font-weight:500;
  color:var(--text-body);
  letter-spacing:.02em;
  transition:color .18s ease;
}
.nav-link-item::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:13px;
  height:2px;
  border-radius:999px;
  background:var(--brand-600);
  opacity:0;
  transform:scaleX(.4);
  transition:opacity .2s ease, transform .2s ease;
}
.nav-link-item:hover{color:var(--brand-600);}
.nav-link-item:hover::after{opacity:.8;transform:scaleX(1);}
.nav-link-item.active{color:var(--text-strong);}
.nav-link-item.active::after{opacity:1;transform:scaleX(1);}
.nav-link-item:focus-visible,
.login-link:focus-visible{
  outline:3px solid var(--brand-100);
  outline-offset:-3px;
  border-radius:6px;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:14px;
  margin-left:auto;
}
.login-link{
  display:inline-flex;
  align-items:center;
  font-size:14px;
  font-weight:500;
  color:var(--text-body);
  padding:8px 2px;
  transition:color .18s ease;
}
.login-link:hover{color:var(--brand-600);}
.header-download-btn{
  white-space:nowrap;
  padding:9px 15px;
  display:inline-flex;
  align-items:center;
  gap:7px;
}
.header-download-btn svg{width:16px;height:16px;}
.hamburger-btn{
  display:none;
  align-items:center;
  justify-content:center;
  width:42px;
  height:42px;
  border-radius:10px;
  border:0;
  background:transparent;
  color:var(--text-strong);
  cursor:pointer;
  transition:background-color .18s ease;
}
.hamburger-btn:hover{background:var(--brand-50);color:var(--brand-600);}
.hamburger-btn svg{width:22px;height:22px;}

.mobile-drawer{
  background:var(--surface);
  border-bottom:1px solid var(--line-light);
}
.mobile-drawer-inner{padding:8px 20px 26px;}
.mobile-drawer-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:12px 0 16px;
}
.mobile-close-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;
  height:38px;
  border:0;
  background:var(--surface-muted);
  color:var(--text-strong);
  border-radius:10px;
  cursor:pointer;
}
.mobile-close-btn:hover{background:var(--brand-100);color:var(--brand-700);}
.mobile-close-btn svg{width:18px;height:18px;}
.mobile-nav-list{display:flex;flex-direction:column;gap:2px;}
.mobile-nav-list a{
  padding:13px 4px;
  font-size:17px;
  color:var(--text-strong);
  border-bottom:1px solid var(--line-light);
  transition:color .18s ease;
}
.mobile-nav-list a:active,
.mobile-nav-list a:hover{color:var(--brand-600);}
.mobile-nav-list a.mobile-login-entry{color:var(--brand-600);font-weight:500;}
.mobile-download-btn{margin-top:18px;}

/* Buttons */
.btn{
  border-radius:var(--radius-md);
  font-size:15px;
  font-weight:500;
  line-height:1.4;
  padding:10px 20px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:1px solid transparent;
  transition:all .18s ease;
  cursor:pointer;
}
.btn:focus-visible{
  outline:3px solid var(--brand-100);
  outline-offset:2px;
  box-shadow:none;
}
.btn-brand{
  background:var(--brand-600);
  border-color:var(--brand-600);
  color:#fff;
}
.btn-brand:hover{
  background:var(--brand-700);
  border-color:var(--brand-700);
  color:#fff;
  transform:translateY(-2px);
  box-shadow:var(--shadow-3);
}
.btn-ghost{
  background:var(--surface);
  border-color:var(--line);
  color:var(--text-strong);
}
.btn-ghost:hover{
  border-color:var(--brand-600);
  color:var(--brand-600);
  background:var(--surface);
  transform:translateY(-2px);
  box-shadow:var(--shadow-2);
}

/* Article body */
.article-page{background:var(--bg-body);}
.article-main{
  padding:66px 0 96px;
  position:relative;
  background:
    radial-gradient(circle at 8% 6%, rgba(61,98,217,.06) 0, transparent 260px),
    radial-gradient(circle at 92% 24%, rgba(157,182,228,.20) 0, transparent 320px),
    var(--bg-body);
}
.article-layout{
  max-width:900px;
  margin:0 auto;
}
.article-card{
  background:var(--surface);
  border:1px solid rgba(255,255,255,.72);
  border-radius:var(--radius-xl);
  box-shadow:var(--shadow-4);
  padding:48px 56px 42px;
}
.crumb-nav{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:7px;
  font-size:13px;
  color:var(--text-muted);
  margin-bottom:20px;
}
.crumb-nav a{color:var(--text-muted);transition:color .18s ease;}
.crumb-nav a:hover{color:var(--brand-600);}
.crumb-sep{color:var(--star-dot);}
.crumb-current{color:var(--text-muted);}
.article-h1{
  font-size:34px;
  line-height:1.32;
  font-weight:700;
  color:var(--text-strong);
  letter-spacing:-.01em;
  margin:0 0 20px;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 18px;
  padding-top:18px;
  border-top:1px solid var(--line-light);
  font-size:14px;
  color:var(--text-muted);
}
.meta-item{
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.meta-tag{
  display:inline-flex;
  align-items:center;
  padding:3px 11px;
  border-radius:999px;
  background:var(--brand-100);
  color:var(--brand-700);
  font-size:13px;
  font-weight:500;
}
.article-body{
  max-width:720px;
  margin:36px auto 0;
  color:var(--text-body);
}
.article-body p{
  font-size:16px;
  line-height:1.85;
  margin:0 0 24px;
}
.article-body a{
  color:var(--brand-600);
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:3px;
}
.article-body a:hover{color:var(--brand-700);}
.article-body h2,
.article-body h3{
  color:var(--text-strong);
  letter-spacing:-.01em;
  line-height:1.4;
}
.article-body h2{
  font-size:24px;
  margin:44px 0 16px;
}
.article-body h3{
  font-size:19px;
  margin:36px 0 12px;
}
.article-body img{
  display:block;
  max-width:100%;
  height:auto;
  border-radius:16px;
  margin:30px auto 18px;
  box-shadow:var(--shadow-2);
}
.article-body img + em,
.article-body .image-caption{
  display:block;
  text-align:center;
  font-size:14px;
  font-style:normal;
  color:var(--text-muted);
  margin:-10px 0 30px;
}
.article-body ul,
.article-body ol{
  margin:0 0 24px;
  padding-left:22px;
}
.article-body li{
  margin-bottom:8px;
  line-height:1.8;
}
.article-body blockquote{
  margin:30px 0;
  padding:18px 22px;
  border-left:4px solid var(--brand-600);
  background:var(--brand-50);
  border-radius:0 var(--radius-lg) var(--radius-lg) 0;
  color:var(--text-body);
  font-size:16px;
  line-height:1.8;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body table{
  width:100%;
  margin:28px 0;
  border-collapse:collapse;
  background:var(--surface);
  border-radius:12px;
  overflow:hidden;
  font-size:14px;
}
.article-body th,
.article-body td{
  border:1px solid var(--line-light);
  padding:11px 14px;
  text-align:left;
}
.article-body th{
  background:var(--brand-50);
  color:var(--text-strong);
  font-weight:600;
}
.article-body code{
  background:var(--surface-muted);
  border:1px solid var(--line-light);
  border-radius:6px;
  padding:2px 6px;
  font-size:14px;
}
.article-body hr{
  border:0;
  border-top:1px solid var(--line);
  margin:36px 0;
}

.article-sub-footer{
  max-width:720px;
  margin:38px auto 0;
  padding-top:22px;
  border-top:1px solid var(--line-light);
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:16px;
}
.article-topic-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.mini-tag{
  display:inline-flex;
  align-items:center;
  border:1px solid var(--line);
  background:var(--surface);
  padding:4px 12px;
  border-radius:999px;
  font-size:13px;
  color:var(--text-muted);
}
.back-home{
  display:inline-flex;
  align-items:center;
  color:var(--brand-600);
  font-size:14px;
  font-weight:500;
}
.back-home:hover{color:var(--brand-700);}
.back-home svg{width:15px;height:15px;margin-right:6px;}

.article-guide-card{
  margin-top:22px;
  background:linear-gradient(135deg, var(--brand-50), rgba(255,255,255,.92) 56%);
  border:1px solid var(--line-light);
  border-radius:var(--radius-xl);
  padding:20px 32px 20px 20px;
  display:grid;
  grid-template-columns:228px 1fr;
  align-items:center;
  gap:30px;
  box-shadow:var(--shadow-2);
}
.article-guide-card img{
  width:100%;
  height:166px;
  object-fit:cover;
  border-radius:18px;
  box-shadow:var(--shadow-2);
}
.guide-label{
  display:inline-flex;
  align-items:center;
  font-size:13px;
  font-weight:500;
  color:var(--brand-700);
  background:var(--brand-100);
  padding:4px 12px;
  border-radius:999px;
}
.guide-h2{
  font-size:21px;
  line-height:1.4;
  color:var(--text-strong);
  font-weight:700;
  margin:14px 0 10px;
}
.guide-desc{
  font-size:15px;
  line-height:1.8;
  color:var(--text-muted);
  margin-bottom:18px;
}
.guide-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* Not found */
.notfound-panel{
  max-width:760px;
  margin:60px auto;
  background:var(--surface);
  border-radius:var(--radius-xl);
  box-shadow:var(--shadow-4);
  border:1px solid rgba(255,255,255,.72);
  padding:76px 48px;
  text-align:center;
}
.notfound-icon{
  width:58px;
  height:58px;
  margin:0 auto 22px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:16px;
  background:var(--brand-50);
  color:var(--brand-600);
}
.notfound-icon svg{width:28px;height:28px;}
.notfound-title{
  font-size:28px;
  font-weight:700;
  color:var(--text-strong);
  margin:0 0 12px;
}
.notfound-panel p{
  font-size:15px;
  line-height:1.8;
  color:var(--text-muted);
  max-width:520px;
  margin:0 auto 28px;
}

/* Footer */
.site-footer{
  background:var(--footer-bg);
  color:var(--footer-text);
  padding:64px 0 28px;
}
.footer-main{display:block;}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:48px;
}
.footer-brand .brand-text{
  color:var(--footer-heading);
  font-size:18px;
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.footer-brand .brand-mark{color:var(--brand-600);}
.footer-brand p{
  margin:18px 0 24px;
  font-size:14px;
  line-height:1.85;
  color:var(--footer-text);
  max-width:330px;
}
.footer-title{
  font-size:15px;
  font-weight:600;
  color:var(--footer-heading);
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-link-list{
  list-style:none;
  padding:0;
  margin:0;
}
.footer-link-list li{margin-bottom:9px;}
.footer-link-list a{
  font-size:14px;
  color:var(--footer-text);
  transition:color .18s ease;
}
.footer-link-list a:hover{color:#fff;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
  border-top:1px solid var(--footer-border);
  margin-top:54px;
  padding-top:22px;
  font-size:13px;
  color:var(--footer-copy);
}

@media (max-width: 1199.98px){
  .footer-grid{grid-template-columns:1.8fr 1fr 1fr 1fr;gap:32px;}
  .article-card{padding:44px 44px 38px;}
}
@media (max-width: 991.98px){
  .desktop-menu{display:none;}
  .hamburger-btn{display:inline-flex;}
  .header-flex{min-height:66px;}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;}
  .footer-grid > div:first-child{grid-column:1 / -1;}
  .article-main{padding:48px 0 76px;}
  .article-layout{max-width:820px;}
  .article-card{padding:40px 36px 34px;}
}
@media (max-width: 767.98px){
  .header-flex{gap:8px;}
  .brand-text{font-size:16px;}
  .header-download-btn{padding:8px 12px;}
  .container,
  .header-wide{padding-left:16px;padding-right:16px;}
  .article-main{padding:28px 0 60px;}
  .article-card{
    padding:28px 20px 26px;
    border-radius:18px;
  }
  .crumb-nav{font-size:12px;margin-bottom:14px;}
  .article-h1{font-size:26px;margin-bottom:16px;}
  .article-meta{gap:8px 12px;font-size:13px;}
  .article-body{margin-top:24px;}
  .article-body p{font-size:15px;}
  .article-body h2{font-size:21px;}
  .article-body h3{font-size:18px;}
  .article-body blockquote{margin:22px 0;padding:14px 16px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
  .article-sub-footer{align-items:flex-start;flex-direction:column;}
  .article-guide-card{
    grid-template-columns:1fr;
    gap:18px;
    padding:18px;
  }
  .article-guide-card img{height:150px;}
  .guide-h2{font-size:19px;}
  .guide-actions{flex-direction:column;align-items:stretch;}
  .guide-actions .btn{width:100%;}
  .notfound-panel{padding:52px 24px;margin:40px 0;}
  .notfound-title{font-size:24px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;text-align:center;margin-top:38px;}
}
@media (max-width: 575.98px){
  .article-main::before{display:none;}
  .header-actions{gap:6px;}
  .header-download-btn {font-size:14px;padding:8px 11px;}
  .footer-brand p{font-size:13px;}
  .article-body p{line-height:1.78;}
  .article-h1{font-size:23px;}
  .download-full{display:none;}
  .download-short{display:inline;}
}
@media (min-width:576px){
  .download-short{display:none;}
}

/* roulang page: category2 */
/* ========== 基础变量 ========== */
    :root {
      --bg-body: #F3F6FB;
      --bg-deep: #E7EDF6;
      --surface: #FFFFFF;
      --surface-muted: #F8FAFE;

      --brand-600: #3D62D9;
      --brand-700: #3151B5;
      --brand-100: #E5ECFA;
      --brand-50: #F1F5FE;

      --accent: #F2A93B;
      --star-dot: #9DB6E4;

      --navy-deep: #15233B;

      --text-strong: #1B2738;
      --text-body: #3F4D62;
      --text-muted: #6B7B93;
      --line: #D9E1EE;
      --line-light: #E8EEF7;

      --shadow-1: 0 2px 8px rgba(40,66,105,.05);
      --shadow-2: 0 6px 18px rgba(40,66,105,.08);
      --shadow-3: 0 16px 40px rgba(40,66,105,.12);
      --radius-md: 8px;
      --radius-lg: 16px;
      --radius-xl: 24px;

      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: var(--font-sans);
      background: var(--bg-body);
      color: var(--text-body);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    a { color: var(--brand-600); text-decoration: none; transition: color .2s ease; }
    a:hover { color: var(--brand-700); }
    img { max-width: 100%; display: block; }
    button, input, select, textarea { font-family: inherit; }
    :focus-visible { outline: 3px solid var(--brand-100); outline-offset: 2px; }
    .container { max-width: 1200px; }
    .header-wide { max-width: 1280px; }

    /* ========== Header ========== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1040;
      background: rgba(255,255,255,.9);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--line-light);
    }
    .header-flex {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 82px;
      gap: 24px;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--text-strong);
      font-weight: 700;
      font-size: 18px;
      letter-spacing: .01em;
      flex-shrink: 0;
    }
    .brand:hover { color: var(--text-strong); }
    .brand-mark {
      width: 36px;
      height: 36px;
      border-radius: 12px;
      background: linear-gradient(145deg, #3D62D9, #20356E);
      color: #fff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-2);
    }
    .brand-mark svg { width: 20px; height: 20px; }
    .brand-text { font-size: 18px; font-weight: 700; color: var(--text-strong); white-space: nowrap; }
    .desktop-menu {
      display: flex;
      align-items: center;
      gap: 34px;
      margin: 0 auto 0 42px;
    }
    .nav-link-item {
      position: relative;
      color: var(--text-strong);
      font-size: 15px;
      font-weight: 500;
      letter-spacing: .02em;
      padding: 30px 0 26px;
      text-decoration: none;
      white-space: nowrap;
    }
    .nav-link-item::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 20px;
      width: 20px;
      height: 2px;
      border-radius: 10px;
      background: var(--brand-600);
      margin: 0 auto;
      opacity: 0;
      transform: scaleX(.4);
      transition: opacity .2s ease, transform .2s ease;
    }
    .nav-link-item:hover { color: var(--brand-600); }
    .nav-link-item:hover::after { opacity: .7; transform: scaleX(1); }
    .nav-link-item.active { color: var(--brand-600); font-weight: 600; }
    .nav-link-item.active::after { opacity: 1; transform: scaleX(1); }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-shrink: 0;
    }
    .login-link {
      color: var(--text-strong);
      font-size: 15px;
      font-weight: 600;
      padding: 10px 18px;
      border-radius: 999px;
      transition: background .2s ease, color .2s ease;
    }
    .login-link:hover { background: var(--brand-50); color: var(--brand-600); }

    .btn {
      border-radius: var(--radius-md);
      font-weight: 600;
      transition: background .2s ease, border-color .2s ease, color .2s ease, box-shadow .2s ease, transform .2s ease;
    }
    .btn-brand {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--brand-600);
      border: 1px solid var(--brand-600);
      color: #fff;
      padding: 10px 22px;
      font-size: 15px;
      box-shadow: var(--shadow-2);
    }
    .btn-brand:hover { background: var(--brand-700); border-color: var(--brand-700); color: #fff; box-shadow: var(--shadow-3); transform: translateY(-2px); }
    .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: transparent;
      border: 1px solid var(--line);
      color: var(--text-strong);
      padding: 10px 22px;
      font-size: 15px;
    }
    .btn-ghost:hover { border-color: var(--brand-600); color: var(--brand-600); box-shadow: var(--shadow-2); }
    .btn-light-brand {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: var(--brand-50);
      border: 1px solid var(--brand-100);
      color: var(--brand-700);
      padding: 10px 22px;
      font-size: 15px;
    }
    .btn-light-brand:hover { background: var(--brand-100); color: var(--brand-700); border-color: var(--brand-600); }
    .header-download-btn { padding: 9px 18px; }
    .header-download-btn svg { width: 16px; height: 16px; }

    .hamburger-btn {
      display: none;
      width: 42px;
      height: 42px;
      border: 1px solid var(--line);
      background: var(--surface);
      border-radius: 10px;
      align-items: center;
      justify-content: center;
      color: var(--text-strong);
    }
    .hamburger-btn svg { width: 22px; height: 22px; }

    .mobile-drawer { background: #fff; border-top: 1px solid var(--line-light); }
    .mobile-drawer-inner { padding: 20px 24px 34px; }
    .mobile-drawer-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
    .mobile-close-btn { border: 0; background: transparent; color: var(--text-strong); width: 38px; height: 38px; border-radius: 10px; }
    .mobile-close-btn svg { width: 20px; height: 20px; }
    .mobile-nav-list { display: flex; flex-direction: column; gap: 4px; }
    .mobile-nav-list a {
      display: block;
      padding: 13px 12px;
      border-radius: 12px;
      color: var(--text-strong);
      font-size: 18px;
      font-weight: 500;
    }
    .mobile-nav-list a:hover { background: var(--brand-50); }
    .mobile-nav-list a.active { background: var(--brand-50); color: var(--brand-600); font-weight: 700; }

    /* ========== 常用区块 ========== */
    .section-block { padding: 96px 0; }
    .section-alt { background: var(--bg-deep); }
    .section-white { background: var(--surface); }
    .section-head { text-align: center; margin-bottom: 44px; }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--brand-50);
      color: var(--brand-700);
      border: 1px solid var(--brand-100);
      border-radius: 999px;
      padding: 5px 14px;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: .02em;
    }
    .section-title {
      margin-top: 14px;
      margin-bottom: 12px;
      color: var(--text-strong);
      font-size: 32px;
      font-weight: 700;
      line-height: 1.3;
    }
    .section-subtitle { max-width: 680px; margin: 0 auto; color: var(--text-muted); font-size: 16px; }
    .brand-hl { color: var(--brand-600); }

    /* ========== 分类 Hero ========== */
    .cat-hero {
      position: relative;
      padding: 74px 0 78px;
      background: linear-gradient(115deg, rgba(243,246,251,.97) 12%, rgba(231,237,246,.85) 72%, rgba(206,220,241,.62) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
      border-bottom: 1px solid var(--line-light);
      overflow: hidden;
    }
    .cat-hero::after {
      content: "";
      position: absolute;
      right: -80px;
      top: -110px;
      width: 360px;
      height: 360px;
      background:
        radial-gradient(circle at 80% 20%, rgba(157,182,228,.36) 0 4px, transparent 5px),
        radial-gradient(circle at 20% 50%, rgba(157,182,228,.24) 0 3px, transparent 4px),
        radial-gradient(circle at 55% 90%, rgba(61,98,217,.16) 0 5px, transparent 6px);
      pointer-events: none;
      z-index: 0;
    }
    .cat-hero .container { position: relative; z-index: 2; }
    .breadcrumb-nav {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 8px;
      margin: 0 0 26px;
      padding: 0;
      list-style: none;
      font-size: 13px;
      color: var(--text-muted);
    }
    .breadcrumb-nav a { color: var(--text-muted); }
    .breadcrumb-nav a:hover { color: var(--brand-600); }
    .breadcrumb-nav span { color: var(--text-strong); }
    .hero-title {
      margin: 16px 0 18px;
      color: var(--text-strong);
      font-size: 46px;
      line-height: 1.25;
      font-weight: 700;
      letter-spacing: -.02em;
    }
    .hero-title .brand-hl { color: var(--brand-600); }
    .hero-lead {
      max-width: 560px;
      color: var(--text-body);
      font-size: 17px;
      line-height: 1.85;
      margin-bottom: 28px;
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-trust {
      display: flex;
      flex-wrap: wrap;
      gap: 22px 34px;
      margin-top: 40px;
      padding-top: 20px;
      border-top: 1px solid var(--line-light);
    }
    .hero-trust span {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--text-body);
      font-size: 14px;
      font-weight: 500;
    }
    .hero-trust svg { width: 16px; height: 16px; color: var(--brand-600); }

    .hero-visual { padding: 8px; }
    .visual-frame {
      background: var(--surface);
      border: 1px solid var(--line-light);
      border-radius: 18px;
      box-shadow: var(--shadow-3);
      padding: 14px 14px 0;
      overflow: hidden;
    }
    .visual-top {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 0 6px 12px;
    }
    .visual-top i {
      display: inline-block;
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #DCE4F0;
    }
    .visual-top i:nth-child(2) { background: #AEBFD8; }
    .visual-top i:nth-child(3) { background: var(--brand-100); }
    .visual-frame img {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
      border-radius: 12px 12px 0 0;
    }
    .visual-note {
      display: flex;
      gap: 12px;
      align-items: center;
      padding: 14px 4px 16px;
      font-size: 13px;
      color: var(--text-muted);
    }
    .visual-note svg { width: 15px; height: 15px; color: var(--accent); }

    /* ========== 下载版本区块 ========== */
    .download-panel { background: var(--surface); border-radius: var(--radius-xl); padding: 44px; box-shadow: var(--shadow-2); }
    .section-head-left { text-align: left; margin-bottom: 32px; }
    .dl-intro { max-width: 620px; }
    .dl-card-row .col-lg-6 { margin-bottom: 24px; }
    .dl-card {
      height: 100%;
      background: var(--surface);
      border: 1px solid var(--line-light);
      border-radius: 18px;
      padding: 26px;
      box-shadow: var(--shadow-1);
      transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
      display: flex;
      gap: 22px;
      align-items: flex-start;
    }
    .dl-card:hover {
      box-shadow: var(--shadow-3);
      transform: translateY(-4px);
      border-color: var(--brand-100);
    }
    .dl-icon {
      width: 60px;
      height: 60px;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--brand-50);
      border: 1px solid var(--brand-100);
      flex-shrink: 0;
    }
    .dl-icon svg { width: 32px; height: 32px; color: var(--brand-600); }
    .dl-content { flex: 1; padding-top: 2px; }
    .dl-content h3 { margin: 0 0 10px; color: var(--text-strong); font-size: 22px; font-weight: 700; line-height: 1.35; }
    .dl-feature-list {
      margin: 6px 0 16px;
      padding: 0;
      list-style: none;
      display: flex;
      flex-wrap: wrap;
      gap: 8px 18px;
      color: var(--text-muted);
      font-size: 14px;
    }
    .dl-feature-list li { position: relative; padding-left: 8px; }
    .dl-feature-list li::before { content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%); width: 3px; height: 3px; border-radius: 50%; background: var(--star-dot); }
    .dl-btn-group .btn { min-width: 160px; margin-right: 8px; margin-bottom: 8px; }
    .mobile-dl-links {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 18px;
      padding-top: 22px;
      border-top: 1px solid var(--line-light);
      margin-top: 6px;
      color: var(--text-muted);
      font-size: 14px;
    }
    .mobile-dl-links a {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--brand-600);
      font-weight: 500;
    }
    .mobile-dl-links svg { width: 17px; height: 17px; }

    /* ========== 安装步骤 ========== */
    .install-section { background: var(--surface-muted); }
    .install-wrap { max-width: 860px; margin: 0 auto; }
    .step-timeline { position: relative; margin-top: 48px; }
    .step-item {
      position: relative;
      display: flex;
      gap: 24px;
      padding-bottom: 34px;
    }
    .step-item:last-child { padding-bottom: 0; }
    .step-item::before {
      content: "";
      position: absolute;
      left: 27px;
      top: 64px;
      bottom: 14px;
      width: 1px;
      background: var(--brand-100);
    }
    .step-item:last-child::before { display: none; }
    .step-dot {
      width: 56px;
      height: 56px;
      background: var(--surface);
      border: 1px solid var(--brand-100);
      color: var(--brand-600);
      border-radius: 50%;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      box-shadow: var(--shadow-1);
      flex-shrink: 0;
      position: relative;
      z-index: 2;
    }
    .step-card {
      flex: 1;
      background: var(--surface);
      border: 1px solid var(--line-light);
      border-radius: 16px;
      padding: 22px 28px 24px;
      box-shadow: var(--shadow-1);
      transition: box-shadow .2s ease, border-color .2s ease;
    }
    .step-card:hover { border-color: var(--brand-100); box-shadow: var(--shadow-2); }
    .step-card h3 { margin: 0 0 8px; font-size: 18px; color: var(--text-strong); font-weight: 700; }
    .step-card p { margin: 0; color: var(--text-muted); font-size: 15px; line-height: 1.8; }
    .step-note {
      margin-top: 18px;
      background: var(--brand-50);
      border-radius: 12px;
      color: var(--brand-700);
      padding: 12px 18px;
      font-size: 14px;
    }

    /* ========== 多端与登录入口 ========== */
    .cross-section { padding: 100px 0; }
    .cross-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px; align-items: center; }
    .cross-copy h2 { margin: 16px 0 14px; font-size: 32px; line-height: 1.3; font-weight: 700; color: var(--text-strong); }
    .cross-copy p { color: var(--text-muted); font-size: 16px; margin-bottom: 20px; }
    .cross-list { list-style: none; margin: 0 0 28px; padding: 0; display: grid; gap: 12px; }
    .cross-list li {
      display: flex;
      gap: 12px;
      align-items: flex-start;
      color: var(--text-body);
      font-weight: 500;
    }
    .cross-list svg {
      margin-top: 5px;
      color: var(--brand-600);
      flex: none;
    }
    .cross-list span { font-size: 15px; }
    .cross-action { display: flex; flex-wrap: wrap; gap: 12px; }
    .cross-media {
      background: linear-gradient(140deg, #E5ECFA, #F3F6FB);
      border: 1px solid var(--line-light);
      border-radius: 24px;
      padding: 28px;
      position: relative;
      box-shadow: var(--shadow-2);
    }
    .cross-media img { border-radius: 16px; box-shadow: var(--shadow-2); }
    .media-caption {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 14px;
      margin-top: 14px;
      font-size: 13px;
      color: var(--text-muted);
    }
    .media-tag {
      display: inline-flex;
      align-items: center;
      background: var(--surface);
      border: 1px solid var(--brand-100);
      color: var(--brand-700);
      padding: 4px 12px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 600;
    }

    /* ========== 系统要求 ========== */
    .req-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
    .req-item {
      background: var(--surface);
      border: 1px solid var(--line-light);
      padding: 24px;
      border-radius: 16px;
      box-shadow: var(--shadow-1);
      transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
    }
    .req-item:hover { border-color: var(--brand-100); box-shadow: var(--shadow-3); transform: translateY(-4px); }
    .req-icon { width: 42px; height: 42px; margin-bottom: 16px; }
    .req-item h3 { font-size: 18px; font-weight: 700; color: var(--text-strong); margin-bottom: 8px; }
    .req-item p { margin: 0; color: var(--text-muted); font-size: 14px; }
    .req-item strong { display: block; color: var(--text-body); font-size: 14px; margin-bottom: 2px; }

    /* ========== FAQ ========== */
    .faq-section { background: var(--surface); }
    .faq-wrap { max-width: 860px; margin: 0 auto; }
    .faq-note {
      text-align: center;
      margin-top: 34px;
      color: var(--text-muted);
      font-size: 14px;
    }
    .faq-note a { color: var(--brand-600); font-weight: 500; }
    .accordion { background: transparent; }
    .accordion-item {
      background: transparent;
      border: 0;
      border-bottom: 1px solid var(--line-light);
      border-radius: 0 !important;
    }
    .accordion-item:first-of-type, .accordion-item:last-of-type { border-radius: 0; }
    .accordion-button {
      background: transparent;
      color: var(--text-strong);
      font-size: 17px;
      font-weight: 600;
      padding: 24px 52px 24px 0;
      border: 0;
      box-shadow: none;
      position: relative;
      line-height: 1.6;
    }
    .accordion-button:hover { color: var(--brand-600); }
    .accordion-button:not(.collapsed) { color: var(--brand-700); background: transparent; box-shadow: none; }
    .accordion-button:focus { box-shadow: none; border: 0; outline: none; }
    .accordion-button::after {
      content: "+";
      position: absolute;
      right: 12px;
      top: 50%;
      transform: translateY(-50%) rotate(0);
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--brand-50);
      color: var(--brand-600);
      font-size: 22px;
      font-weight: 400;
      display: flex;
      align-items: center;
      justify-content: center;
      line-height: 1;
      transition: transform .25s ease, background .25s ease;
    }
    .accordion-button:not(.collapsed)::after {
      transform: translateY(-50%) rotate(45deg);
      background: var(--brand-100);
    }
    .accordion-body {
      padding: 0 40px 26px 0;
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.9;
    }

    /* ========== 最后 CTA / 登录入口速达 ========== */
    .cta-band { padding: 70px 0; background: var(--bg-body); }
    .cta-inner {
      background: linear-gradient(118deg, #15233B, #22385F);
      border-radius: var(--radius-xl);
      color: #E9EFF8;
      padding: 48px 52px;
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      align-items: center;
      gap: 28px;
      box-shadow: var(--shadow-3);
    }
    .cta-inner .cta-text h2 {
      margin: 0 0 10px;
      color: #fff;
      font-size: 28px;
      line-height: 1.4;
      font-weight: 700;
    }
    .cta-inner .cta-text p { margin: 0; max-width: 540px; color: #C7D2E6; }
    .cta-inner .cta-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-end; }
    .btn-white {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #fff;
      border-color: #fff;
      color: var(--text-strong);
      font-weight: 600;
      padding: 11px 26px;
    }
    .btn-white:hover { background: #EDF2FC; border-color: #EDF2FC; color: var(--brand-700); transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0,0,0,.18); }
    .btn-outline-light {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: transparent;
      border: 1px solid rgba(255,255,255,.55);
      color: #fff;
      padding: 10px 24px;
    }
    .btn-outline-light:hover { background: rgba(255,255,255,.06); border-color: #fff; color: #fff; }

    .login-quick {
      background: var(--surface);
      border-bottom: 1px solid var(--line-light);
      padding: 72px 0;
    }
    .login-quick-card {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 32px;
      border: 1px solid var(--brand-100);
      background: var(--brand-50);
      border-radius: 22px;
      padding: 28px 32px;
      flex-wrap: wrap;
    }
    .login-quick-copy { display: flex; gap: 18px; align-items: center; flex: 1; min-width: 280px; }
    .login-quick-icon {
      width: 52px;
      height: 52px;
      border: 1px solid var(--brand-100);
      background: var(--surface);
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--brand-600);
      flex: none;
    }
    .login-quick-copy h2 { margin: 0 0 4px; color: var(--text-strong); font-size: 20px; font-weight: 700; }
    .login-quick-copy p { margin: 0; color: var(--text-muted); font-size: 15px; }
    .login-quick-actions { display: flex; flex-wrap: wrap; gap: 10px; }

    /* ========== Footer ========== */
    .site-footer { background: var(--navy-deep); color: #B7C3D9; padding: 68px 0 28px; }
    .footer-main { margin-bottom: 34px; }
    .footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 48px; }
    .footer-brand .brand-text {
      display: block;
      color: #fff;
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .footer-brand p { font-size: 14px; line-height: 1.85; color: #9EAECB; margin: 14px 0 24px; max-width: 320px; }
    .footer-title { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 18px; }
    .footer-link-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
    .footer-link-list a { color: #B7C3D9; font-size: 14px; transition: color .2s ease, padding-left .2s ease; }
    .footer-link-list a:hover { color: #fff; padding-left: 4px; }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,.1);
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 10px 20px;
      font-size: 13px;
      color: #8E9DBB;
    }

    /* ========== 响应式 ========== */
    @media (max-width: 991px) {
      .desktop-menu { display: none; }
      .hamburger-btn { display: inline-flex; }
      .header-flex { gap: 12px; }
      .login-link { display: none !important; }
      .section-block { padding: 72px 0; }
      .cat-hero { padding: 52px 0 56px; }
      .hero-title { font-size: 40px; }
      .download-panel { padding: 28px 24px; }
      .cross-grid { grid-template-columns: 1fr; gap: 40px; }
      .req-grid { grid-template-columns: repeat(2,1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px 28px; }
      .cta-inner { grid-template-columns: 1fr; padding: 38px 28px; }
      .cta-inner .cta-actions { justify-content: flex-start; }
    }

    @media (max-width: 767px) {
      .section-block { padding: 56px 0; }
      .cat-hero { padding: 40px 0 48px; }
      .hero-title { font-size: 31px; }
      .section-title { font-size: 24px; }
      .header-flex { min-height: 70px; }
      .download-panel { padding: 20px 16px; border-radius: 18px; }
      .dl-card { flex-direction: column; padding: 22px 18px; }
      .dl-btn-group .btn { width: 100%; min-width: 0; margin-right: 0; }
      .step-item { gap: 16px; }
      .step-item::before { left: 20px; }
      .step-dot { width: 40px; height: 40px; font-size: 16px; }
      .step-card { padding: 18px; }
      .step-card h3 { font-size: 17px; }
      .step-card p, .step-note { font-size: 14px; }
      .req-grid { grid-template-columns: 1fr; }
      .cross-section { padding: 56px 0; }
      .cross-copy h2 { font-size: 24px; }
      .cross-media { padding: 16px; }
      .accordion-button { font-size: 16px; padding: 20px 44px 20px 0; }
      .accordion-body { font-size: 14px; padding-top: 0; padding-right: 12px; }
      .login-quick-card { padding: 20px; }
      .login-quick-copy { flex-direction: column; align-items: flex-start; }
      .footer-grid { grid-template-columns: 1fr; gap: 28px; }
      .cta-inner .cta-text h2 { font-size: 23px; }
    }

    @media (min-width: 768px) and (max-width: 1024px) {
      .desktop-menu { gap: 20px; margin-left: 14px; }
      .header-download-btn .download-full { display: none; }
    }

    @media (max-width: 520px) {
      .hero-trust { gap: 16px; }
      .hero-actions .btn, .cross-action .btn { width: 100%; min-width: 0; }
      .cta-actions .btn { width: 100%; }
      .visual-note { font-size: 12px; }
    }

/* roulang page: category3 */
:root{
  --bg-body:#F3F6FB;
  --bg-deep:#E7EDF6;
  --surface:#FFFFFF;
  --surface-muted:#F8FAFE;

  --brand-600:#3D62D9;
  --brand-700:#3151B5;
  --brand-100:#E5ECFA;
  --brand-50:#F1F5FE;

  --accent:#F2A93B;
  --star-dot:#9DB6E4;

  --text-strong:#1B2738;
  --text-body:#3F4D62;
  --text-muted:#6B7B93;
  --line:#D9E1EE;
  --line-light:#E8EEF7;

  --shadow-1:0 2px 8px rgba(40,66,105,.05);
  --shadow-2:0 6px 18px rgba(40,66,105,.08);
  --shadow-3:0 16px 40px rgba(40,66,105,.12);
  --radius-md:8px;
  --radius-lg:16px;
  --radius-xl:24px;

  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
  --plus:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%233D62D9' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E");
}

html{
  scroll-behavior:smooth;
}

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

body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--text-body);
  background:var(--bg-body);
  -webkit-font-smoothing:antialiased;
}

img{
  max-width:100%;
  height:auto;
}

a{
  color:var(--brand-600);
  text-decoration:none;
  transition:color .18s ease;
}

a:hover{
  color:var(--brand-700);
}

button{
  font-family:inherit;
}

:focus-visible{
  outline:3px solid var(--brand-100);
  outline-offset:2px;
}

.container{
  max-width:1200px;
  padding-left:24px;
  padding-right:24px;
}

.header-wide{
  max-width:1280px;
}

/* 导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(255,255,255,.9);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-light);
}

.header-flex{
  min-height:76px;
  display:flex;
  align-items:center;
  gap:34px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text-strong);
  font-size:19px;
  font-weight:700;
  letter-spacing:.01em;
  white-space:nowrap;
}

.brand:hover{
  color:var(--text-strong);
}

.brand-mark{
  display:inline-flex;
  color:var(--brand-600);
  width:22px;
  height:22px;
  flex:0 0 auto;
}

.brand-mark svg{
  width:100%;
  height:100%;
}

.desktop-menu{
  display:flex;
  align-items:center;
  gap:30px;
  margin-left:8px;
}

.nav-link-item{
  position:relative;
  display:inline-flex;
  align-items:center;
  font-size:15px;
  font-weight:500;
  color:var(--text-body);
  letter-spacing:.02em;
  padding:14px 2px;
  text-decoration:none;
}

.nav-link-item::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:6px;
  width:20px;
  height:2px;
  margin:0 auto;
  border-radius:2px;
  background:var(--brand-600);
  opacity:0;
  transform:scaleX(.4);
  transition:opacity .2s ease,transform .2s ease;
}

.nav-link-item:hover{
  color:var(--brand-600);
}

.nav-link-item:hover::after{
  opacity:1;
  transform:scaleX(1);
}

.nav-link-item.active{
  color:var(--brand-600);
}

.nav-link-item.active::after{
  opacity:1;
  transform:scaleX(1);
}

.header-actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:16px;
}

.login-link{
  display:none;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:600;
  padding:9px 18px;
  color:var(--brand-600);
  background:var(--brand-50);
  border:1px solid var(--brand-100);
  border-radius:var(--radius-md);
  text-decoration:none;
  transition:background .18s ease,border-color .18s ease,color .18s ease;
}

.login-link:hover{
  background:var(--brand-100);
  border-color:var(--brand-600);
  color:var(--brand-700);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:var(--radius-md);
  padding:11px 22px;
  font-size:15px;
  font-weight:600;
  line-height:1.4;
  letter-spacing:.01em;
  border:1px solid transparent;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
}

.btn-brand{
  background:var(--brand-600);
  color:#fff;
  border-color:var(--brand-600);
  box-shadow:var(--shadow-2);
}

.btn-brand:hover{
  background:var(--brand-700);
  border-color:var(--brand-700);
  color:#fff;
  box-shadow:var(--shadow-3);
  transform:translateY(-2px);
}

.btn-outline{
  background:var(--surface);
  color:var(--text-strong);
  border-color:var(--line);
  box-shadow:var(--shadow-1);
}

.btn-outline:hover{
  color:var(--brand-600);
  border-color:var(--brand-600);
  box-shadow:var(--shadow-2);
  transform:translateY(-2px);
}

.btn-white{
  background:#fff;
  color:var(--text-strong);
  border-color:transparent;
  box-shadow:var(--shadow-2);
}

.btn-white:hover{
  color:var(--brand-600);
  transform:translateY(-2px);
  box-shadow:var(--shadow-3);
}

.btn-block{
  width:100%;
}

.header-download-btn{
  min-width:112px;
  padding:9px 16px;
}

.hamburger-btn{
  display:none;
  align-items:center;
  justify-content:center;
  width:42px;
  height:42px;
  padding:0;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--text-strong);
}

.hamburger-btn svg{
  width:22px;
  height:22px;
}

.mobile-drawer{
  position:fixed;
  top:0;
  right:0;
  bottom:0;
  width:min(100%,420px);
  z-index:1100;
  background:var(--surface);
  border-left:1px solid var(--line-light);
  padding:22px;
  overflow-y:auto;
}

.mobile-drawer-inner{
  display:flex;
  flex-direction:column;
  height:100%;
}

.mobile-drawer-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:30px;
}

.mobile-close-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  border:1px solid var(--line);
  background:var(--surface);
  border-radius:10px;
  color:var(--text-strong);
}

.mobile-close-btn svg{
  width:20px;
  height:20px;
}

.mobile-nav-list{
  display:flex;
  flex-direction:column;
  gap:4px;
}

.mobile-nav-list a{
  font-size:17px;
  font-weight:600;
  color:var(--text-body);
  padding:15px 12px;
  border-radius:10px;
  text-decoration:none;
}

.mobile-nav-list a:hover,
.mobile-nav-list a.active{
  color:var(--brand-600);
  background:var(--brand-50);
}

.mobile-drawer-extra{
  margin-top:auto;
  padding-top:28px;
  display:flex;
  flex-direction:column;
  gap:12px;
}

.mobile-drawer-extra .btn-outline{
  border-color:var(--line);
}

/* 页面主体间距 */
.main{
  overflow:hidden;
}

.section{
  padding:96px 0;
}

.section-sm{
  padding:64px 0;
}

.section-head{
  margin-bottom:52px;
  max-width:720px;
}

.section-head.center{
  margin-left:auto;
  margin-right:auto;
  text-align:center;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--brand-600);
  background:var(--brand-50);
  border:1px solid var(--brand-100);
  padding:6px 14px;
  border-radius:999px;
  margin-bottom:18px;
}

.eyebrow-dot{
  width:6px;
  height:6px;
  border-radius:50%;
  display:inline-block;
  background:var(--accent);
}

.section-kicker{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--brand-600);
  text-transform:none;
  margin-bottom:10px;
}

h1, h2, h3, h4, h5{
  color:var(--text-strong);
  font-weight:700;
  line-height:1.3;
  margin:0 0 16px;
}

h1{
  font-size:44px;
  letter-spacing:-.01em;
}

h2{
  font-size:32px;
  letter-spacing:-.01em;
}

h3{
  font-size:20px;
  line-height:1.45;
}

p{
  margin:0 0 18px;
}

.section-lead{
  font-size:17px;
  color:var(--text-muted);
  margin-bottom:32px;
}

/* 面包屑 */
.crumb-wrap{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-muted);
  margin-bottom:18px;
}

.crumb-wrap a{
  color:var(--text-muted);
  text-decoration:none;
}

.crumb-wrap a:hover{
  color:var(--brand-600);
}

.crumb-sep{
  color:var(--star-dot);
}

/* 首屏 */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:64px 0 92px;
  background:
    radial-gradient(circle at 12% 18%, rgba(61,98,217,.08), transparent 28%),
    radial-gradient(circle at 88% 28%, rgba(242,169,59,.08), transparent 22%),
    linear-gradient(120deg, rgba(243,246,251,.94), rgba(231,237,246,.92)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
}

.page-hero::before{
  content:"";
  position:absolute;
  width:200px;
  height:200px;
  right:-60px;
  bottom:-40px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(157,182,228,.26), transparent 65%);
  pointer-events:none;
}

.page-hero .container{
  position:relative;
  z-index:2;
}

.hero-title{
  font-size:42px;
  line-height:1.25;
  margin-bottom:18px;
  letter-spacing:-.02em;
}

.hero-title .hero-accent{
  color:var(--brand-600);
}

.hero-lead{
  font-size:16px;
  color:var(--text-body);
  max-width:560px;
  line-height:1.8;
  margin-bottom:26px;
}

.safe-points{
  list-style:none;
  padding:0;
  margin:0 0 32px;
  display:flex;
  flex-direction:column;
  gap:10px;
}

.safe-points li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  color:var(--text-body);
  font-size:15px;
}

.safe-points svg{
  width:18px;
  height:18px;
  color:var(--brand-600);
  flex:0 0 auto;
  margin-top:2px;
}

.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}

/* 登录窗口示意 */
.login-window{
  background:var(--surface);
  border-radius:20px;
  box-shadow:var(--shadow-3);
  border:1px solid var(--line-light);
  overflow:hidden;
  max-width:560px;
  margin-left:auto;
}

.window-toolbar{
  display:flex;
  align-items:center;
  gap:10px;
  background:var(--surface-muted);
  padding:14px 20px;
  border-bottom:1px solid var(--line-light);
}

.window-dots{
  display:inline-flex;
  gap:6px;
}

.window-dots span{
  width:10px;
  height:10px;
  border-radius:50%;
  display:inline-block;
}

.window-dots .d-1{background:#F2A93B;}
.window-dots .d-2{background:#9DB6E4;}
.window-dots .d-3{background:#C9D7EF;}

.window-label{
  margin-left:auto;
  font-size:12px;
  color:var(--text-muted);
}

.window-body{
  padding:30px;
}

.login-panel-tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:13px;
  font-weight:600;
  color:var(--brand-700);
  background:var(--brand-50);
  padding:6px 13px;
  border-radius:999px;
  margin-bottom:22px;
}

.login-avatar{
  width:52px;
  height:52px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--brand-100);
  border-radius:15px;
  color:var(--brand-600);
  margin-bottom:14px;
}

.login-avatar svg{
  width:26px;
  height:26px;
}

.window-body h3{
  font-size:19px;
  color:var(--text-strong);
  margin-bottom:18px;
}

.login-mode-tabs{
  display:flex;
  gap:6px;
  background:var(--surface-muted);
  border:1px solid var(--line-light);
  padding:4px;
  border-radius:10px;
  margin-bottom:20px;
}

.login-mode-tabs span{
  flex:1;
  text-align:center;
  font-size:14px;
  font-weight:500;
  padding:8px 10px;
  border-radius:7px;
  color:var(--text-muted);
}

.login-mode-tabs span.active{
  background:var(--surface);
  color:var(--brand-600);
  box-shadow:var(--shadow-1);
  font-weight:600;
}

.demo-field{
  margin-bottom:16px;
}

.demo-field label{
  display:block;
  font-size:13px;
  font-weight:600;
  color:var(--text-body);
  margin-bottom:7px;
}

.demo-input{
  background:var(--surface-muted);
  border:1px solid var(--line);
  border-radius:8px;
  padding:11px 14px;
  font-size:14px;
  color:var(--text-strong);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
}

.demo-input .demo-placeholder{
  color:var(--star-dot);
}

.demo-check{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-muted);
  margin:10px 0 24px;
}

.demo-btn{
  display:block;
  width:100%;
  text-align:center;
  padding:11px 20px;
  border-radius:9px;
  background:var(--brand-600);
  color:#fff;
  font-size:15px;
  font-weight:600;
  box-shadow:var(--shadow-2);
}

.window-foot{
  margin-top:22px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  font-size:13px;
  color:var(--text-muted);
}

.window-foot span{
  color:var(--brand-600);
  font-weight:600;
}

/* 登录步骤 */
.step-section{
  background:var(--surface);
}

.step-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  counter-reset:step;
}

.step-item{
  position:relative;
  border-radius:16px;
  background:var(--surface-muted);
  border:1px solid var(--line-light);
  padding:30px 26px 26px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}

.step-item:hover{
  transform:translateY(-4px);
  border-color:var(--brand-100);
  box-shadow:var(--shadow-3);
  background:var(--surface);
}

.step-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border-radius:50%;
  background:var(--brand-100);
  color:var(--brand-700);
  font-weight:700;
  font-size:18px;
  margin-bottom:22px;
}

.step-item h3{
  font-size:18px;
  margin-bottom:10px;
}

.step-item p{
  font-size:14px;
  color:var(--text-muted);
  margin-bottom:0;
  line-height:1.75;
}

/* 两列说明 */
.detail-band{
  background:var(--bg-body);
}

.detail-band.alt{
  background:var(--surface);
}

.editor-row{
  display:grid;
  grid-template-columns:minmax(0,.92fr) minmax(0,1.25fr);
  gap:72px;
  align-items:start;
}

.editor-left{
  position:relative;
}

.editor-left h2{
  font-size:28px;
  line-height:1.35;
  margin-top:10px;
  margin-bottom:18px;
}

.editor-intro{
  color:var(--text-body);
  font-size:16px;
}

.editor-visual{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:16px;
  box-shadow:var(--shadow-3);
  margin:24px 0 0;
}

.editor-list{
  list-style:none;
  padding:0;
  margin:0;
}

.editor-list-item{
  position:relative;
  display:flex;
  gap:18px;
  padding:22px 0;
  border-bottom:1px solid var(--line-light);
}

.editor-list-item:first-child{
  border-top:1px solid var(--line-light);
}

.editor-index{
  color:var(--brand-600);
  font-size:14px;
  font-weight:700;
  line-height:1.8;
  display:flex;
  align-items:flex-start;
  gap:8px;
}

.editor-index::after{
  content:"01";
  font-feature-settings:"tnum";
}

.editor-list-item:nth-child(1) .editor-index::after{content:"01";}
.editor-list-item:nth-child(2) .editor-index::after{content:"02";}
.editor-list-item:nth-child(3) .editor-index::after{content:"03";}
.editor-list-item:nth-child(4) .editor-index::after{content:"04";}

.editor-list-item h3{
  font-size:17px;
  font-weight:700;
  color:var(--text-strong);
  margin-bottom:4px;
}

.editor-list-item p{
  font-size:15px;
  color:var(--text-muted);
  margin:0;
}

/* 客户端与系统适配 */
.client-band{
  background:var(--bg-deep);
  position:relative;
  overflow:hidden;
}

.client-band .container{
  position:relative;
  z-index:1;
}

.client-card{
  background:var(--surface);
  border-radius:20px;
  box-shadow:var(--shadow-3);
  border:1px solid var(--line-light);
  padding:32px;
}

.client-card h3{
  font-size:21px;
  margin-bottom:8px;
}

.client-card p{
  color:var(--text-muted);
  font-size:15px;
  margin-bottom:26px;
}

.platform-pills{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:30px;
}

.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:var(--brand-50);
  color:var(--text-strong);
  border:1px solid var(--brand-100);
  padding:8px 16px;
  border-radius:999px;
  font-size:14px;
  font-weight:600;
}

.pill svg{
  width:16px;
  height:16px;
  color:var(--brand-600);
}

.client-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}

.security-note{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:13px;
  color:var(--text-muted);
  line-height:1.7;
  margin-top:20px;
}

.security-note svg{
  width:16px;
  height:16px;
  color:var(--brand-600);
  flex:0 0 auto;
  margin-top:3px;
}

/* FAQ */
.faq-band{
  background:var(--surface);
}

.custom-accordion{
  max-width:800px;
  margin:0 auto;
}

.accordion-item{
  background:transparent;
  border:0;
  border-bottom:1px solid var(--line-light);
}

.accordion-button{
  background:transparent;
  color:var(--text-strong);
  font-size:17px;
  font-weight:600;
  padding:22px 48px 22px 0;
  line-height:1.5;
  box-shadow:none !important;
  border:0;
}

.accordion-button:hover,
.accordion-button:not(.collapsed){
  background:transparent;
  color:var(--brand-600);
  box-shadow:none !important;
}

.accordion-button::after{
  background-image:var(--plus);
  background-size:18px;
  width:20px;
  height:20px;
  background-position:center;
  transition:transform .2s ease;
}

.accordion-button:not(.collapsed)::after{
  transform:rotate(45deg);
  background-image:var(--plus);
}

.accordion-body{
  padding:0 56px 26px 0;
  color:var(--text-body);
  font-size:15px;
}

/* CTA */
.cta-band{
  background:var(--bg-body);
  padding:76px 0 96px;
}

.cta-card{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  background:
    radial-gradient(circle at 88% 10%, rgba(242,169,59,.14), transparent 30%),
    linear-gradient(120deg,var(--surface),var(--brand-50));
  border:1px solid var(--line-light);
  border-radius:24px;
  padding:48px 56px;
  box-shadow:var(--shadow-2);
}

.cta-card h2{
  font-size:27px;
  margin-bottom:10px;
}

.cta-card p{
  color:var(--text-muted);
  margin-bottom:0;
  max-width:640px;
}

.cta-actions{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  flex:0 0 auto;
}

.cta-actions .btn-plus{
  color:var(--brand-600);
  font-weight:600;
  padding:8px 0;
  background:none;
  border:0;
}

/* 页脚 */
.site-footer{
  background:#15233B;
  color:#AAB9D4;
}

.footer-main{
  padding:72px 0 44px;
}

.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:44px;
}

.footer-brand .brand-text{
  display:block;
  color:#fff;
  font-size:20px;
  font-weight:700;
  margin-bottom:15px;
}

.footer-brand .brand-mark{
  color:var(--star-dot);
}

.footer-brand p{
  color:#AAB9D4;
  font-size:14px;
  line-height:1.9;
  max-width:360px;
  margin-bottom:24px;
}

.footer-title{
  color:#fff;
  font-weight:600;
  font-size:16px;
  margin-bottom:18px;
}

.footer-link-list{
  list-style:none;
  padding:0;
  margin:0;
  display:flex;
  flex-direction:column;
  gap:12px;
}

.footer-link-list a{
  color:#AAB9D4;
  font-size:14px;
  text-decoration:none;
  transition:color .18s ease,padding-left .18s ease;
}

.footer-link-list a:hover{
  color:#fff;
  padding-left:3px;
}

.footer-bottom{
  border-top:1px solid rgba(255,255,255,.09);
  padding:22px 0;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px;
  font-size:13px;
  color:#7D90AF;
}

.footer-bottom a{
  color:#7D90AF;
  text-decoration:none;
}

/* Bootstrap 覆盖 */
.form-control{
  border-radius:var(--radius-md);
}

.card{
  border-color:var(--line-light);
  border-radius:var(--radius-lg);
}

/* 响应式 */
@media (max-width:1199.98px){
  .desktop-menu{
    gap:22px;
  }
  .header-flex{
    gap:20px;
  }
  .step-grid{
    gap:18px;
  }
  .editor-row{
    gap:48px;
  }
}

@media (max-width:991.98px){
  .desktop-menu{
    display:none;
  }
  .hamburger-btn{
    display:inline-flex;
  }
  .header-actions .login-link{
    display:none;
  }
  .section{
    padding:76px 0;
  }
  .hero-title{
    font-size:34px;
  }
  .step-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .editor-row{
    grid-template-columns:1fr;
    gap:44px;
  }
  .editor-left h2{
    font-size:26px;
  }
  .footer-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .cta-card{
    flex-direction:column;
    text-align:center;
    padding:36px 30px;
  }
  .cta-actions{
    justify-content:center;
  }
  .login-window{
    margin-left:0;
    margin-top:12px;
  }
}

@media (max-width:767.98px){
  .section{
    padding:64px 0;
  }
  .site-header .brand-text{
    font-size:16px;
  }
  .brand-mark{
    width:20px;
    height:20px;
  }
  .header-download-btn{
    min-width:auto;
    padding:9px 14px;
  }
  .hero-title{
    font-size:28px;
  }
  .hero-lead{
    font-size:15px;
  }
  .section-head h2{
    font-size:24px;
  }
  .section-lead{
    font-size:15px;
  }
  .step-grid{
    grid-template-columns:1fr;
  }
  .step-item{
    padding:24px 22px;
  }
  .window-body{
    padding:22px;
  }
  .content-pagination{
    flex-direction:column;
    align-items:flex-start;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:32px;
  }
  .footer-main{
    padding:56px 0 32px;
  }
  .footer-bottom{
    flex-direction:column;
    text-align:center;
    align-items:center;
  }
  .cta-band{
    padding:60px 0 72px;
  }
  .cta-card h2{
    font-size:23px;
  }
}

/* roulang page: category4 */
:root{
  --bg-body:#F3F6FB;
  --bg-deep:#E7EDF6;
  --surface:#FFFFFF;
  --surface-muted:#F8FAFE;
  --brand-600:#3D62D9;
  --brand-700:#3151B5;
  --brand-100:#E5ECFA;
  --brand-50:#F1F5FE;
  --accent:#F2A93B;
  --star-dot:#9DB6E4;
  --text-strong:#1B2738;
  --text-body:#3F4D62;
  --text-muted:#6B7B93;
  --line:#D9E1EE;
  --line-light:#E8EEF7;
  --shadow-1:0 2px 8px rgba(40,66,105,.05);
  --shadow-2:0 6px 18px rgba(40,66,105,.08);
  --shadow-3:0 16px 40px rgba(40,66,105,.12);
  --radius-md:8px;
  --radius-lg:16px;
  --radius-xl:24px;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--bg-body);
  color:var(--text-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background .18s ease,box-shadow .18s ease}
img{max-width:100%;height:auto;display:block}
button{font:inherit;cursor:pointer}
ul{list-style:none;margin:0;padding:0}
section[id]{scroll-margin-top:96px}
:focus-visible{outline:3px solid var(--brand-100);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.container-wide{max-width:1280px}
.container-narrow{max-width:860px}
.w-100{width:100%}
.d-none{display:none!important}
.d-flex{display:flex!important}

/* ===== Header ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(140%) blur(12px);
  -webkit-backdrop-filter:saturate(140%) blur(12px);
  border-bottom:1px solid var(--line-light);
}
.header-flex{display:flex;align-items:center;gap:28px;height:76px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:38px;height:38px;flex:0 0 auto;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;color:#fff;background:linear-gradient(135deg,#4272EC 0%,#3151B5 100%);box-shadow:var(--shadow-1);font-size:15px}
.brand-mark svg{width:20px;height:20px;display:block}
.brand-text{font-size:18px;font-weight:700;letter-spacing:.02em;color:var(--text-strong);white-space:nowrap}
.desktop-menu{display:flex;align-items:center;gap:2px;margin-left:10px}
.nav-link-item{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:10px 14px;
  color:var(--text-body);
  font-size:15px;
  font-weight:500;
  letter-spacing:.02em;
  white-space:nowrap;
}
.nav-link-item::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:4px;
  height:2px;
  border-radius:2px;
  background:var(--brand-600);
  opacity:0;
  transform:scaleX(.35);
  transition:opacity .2s ease,transform .2s ease;
}
.nav-link-item:hover{color:var(--brand-600)}
.nav-link-item.active{color:var(--brand-600);font-weight:600}
.nav-link-item:hover::after,
.nav-link-item.active::after{opacity:1;transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto}
.login-link{display:inline-flex;align-items:center;color:var(--text-strong);font-size:15px;font-weight:600;white-space:nowrap}
.login-link:hover{color:var(--brand-600)}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  border:1px solid transparent;
  border-radius:var(--radius-md);
  font-size:15px;
  font-weight:600;
  line-height:1;
  white-space:nowrap;
  transition:background .18s ease,border-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease;
  flex-shrink:0;
}
.btn:focus-visible{outline:3px solid var(--brand-100);outline-offset:2px}
.btn-brand{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-1)}
.btn-brand:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-brand:active{transform:translateY(0) scale(.99)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--text-strong);box-shadow:var(--shadow-1)}
.btn-ghost:hover{border-color:var(--brand-600);color:var(--brand-600);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-ghost:active{transform:translateY(0) scale(.99)}
.header-download-btn{height:40px;padding:0 18px;font-size:14px}
.header-download-btn svg{width:15px;height:15px;display:block}
.hamburger-btn{display:none;width:44px;height:44px;align-items:center;justify-content:center;border:1px solid var(--line-light);background:#fff;border-radius:var(--radius-md);color:var(--text-strong);padding:0;transition:border-color .18s ease,color .18s ease}
.hamburger-btn:hover{border-color:var(--brand-100);color:var(--brand-600)}
.hamburger-btn svg{width:21px;height:21px;display:block}
.mobile-drawer{
  position:fixed;
  top:0;
  left:0;
  right:0;
  bottom:0;
  z-index:1090;
  background:rgba(255,255,255,.98);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  padding:20px 24px 32px;
  overflow-y:auto;
  display:none;
}
.mobile-drawer.show{display:block}
.mobile-drawer-inner{max-width:640px;margin:0 auto}
.mobile-drawer-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line-light)}
.mobile-close-btn{width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;background:var(--surface-muted);border:1px solid var(--line-light);color:var(--text-strong);border-radius:var(--radius-md);padding:0}
.mobile-close-btn svg{width:20px;height:20px;display:block}
.mobile-close-btn:hover{color:var(--brand-600);border-color:var(--brand-100)}
.mobile-nav-list{display:flex;flex-direction:column;gap:0;padding:20px 0}
.mobile-nav-list a{display:block;padding:14px 2px;font-size:18px;font-weight:500;color:var(--text-strong);border-bottom:1px solid var(--line-light)}
.mobile-nav-list a:hover,.mobile-nav-list a.active{color:var(--brand-600)}
.mobile-actions{display:flex;gap:12px;padding-top:16px;flex-wrap:wrap}
.mobile-actions .btn{flex:1 1 140px}

/* ===== Category Hero ===== */
.category-hero{
  position:relative;
  padding:84px 0 76px;
  overflow:hidden;
  background:
    linear-gradient(180deg,rgba(243,246,251,.88) 0%,rgba(255,255,255,.95) 55%,rgba(243,246,251,.8) 100%),
    url('/assets/images/backpic/back-1.png') center / cover no-repeat;
}
.category-hero::before{
  content:"";
  position:absolute;
  width:180px;
  height:180px;
  border-radius:50%;
  background:radial-gradient(circle at center,rgba(157,182,228,.34) 0%,rgba(157,182,228,0) 70%);
  top:-40px;
  right:8%;
  pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
.breadcrumb-nav{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-muted);margin-bottom:22px;flex-wrap:wrap}
.breadcrumb-nav a{color:var(--text-muted)}
.breadcrumb-nav a:hover{color:var(--brand-600)}
.breadcrumb-nav .sep{color:var(--star-dot);margin:0 2px}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.04em;color:var(--brand-700);background:rgba(255,255,255,.75);border:1px solid var(--brand-100);padding:6px 14px;border-radius:999px;margin:0 0 20px}
.hero-eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);display:inline-block}
.category-hero h1{
  font-size:42px;
  line-height:1.28;
  font-weight:700;
  color:var(--text-strong);
  margin:0 0 20px;
  letter-spacing:-.01em;
}
.category-hero h1 .text-accent{color:var(--brand-600)}
.hero-lead{font-size:17px;line-height:1.8;color:var(--text-body);margin:0 0 30px;max-width:520px}
.hero-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.hero-actions .btn{height:48px;padding:0 26px}
.help-window{
  background:#fff;
  border:1px solid rgba(255,255,255,.9);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-3);
  overflow:hidden;
}
.window-toolbar{
  display:flex;
  align-items:center;
  gap:12px;
  padding:13px 16px;
  background:var(--surface-muted);
  border-bottom:1px solid var(--line-light);
}
.window-dots{display:flex;gap:6px}
.window-dots span{width:10px;height:10px;border-radius:50%;background:var(--line)}
.window-dots span:first-child{background:#C9D4E8}
.window-address{
  flex:1;
  min-width:0;
  background:#fff;
  border:1px solid var(--line-light);
  border-radius:6px;
  padding:5px 12px;
  font-size:12px;
  color:var(--text-muted);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.help-window .window-image{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--bg-body)}
.window-footer{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 16px;background:#fff;border-top:1px solid var(--line-light)}
.status-pill{display:inline-flex;align-items:center;background:var(--brand-50);color:var(--brand-700);font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px}
.window-note{font-size:13px;color:var(--text-muted)}

/* ===== Help channel ===== */
.help-channel{padding:24px 0 0}
.channel-row{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  padding:18px 22px;
  background:var(--surface);
  border:1px solid var(--line-light);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);
}
.channel-label{font-size:13px;font-weight:600;color:var(--text-muted);letter-spacing:.03em;margin-right:6px}
.channel-chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:500;
  color:var(--text-body);
  background:var(--surface-muted);
  border:1px solid var(--line-light);
  padding:7px 16px;
  border-radius:999px;
  transition:all .18s ease;
}
.channel-chip:hover{
  color:var(--brand-700);
  border-color:var(--brand-100);
  background:var(--brand-50);
  transform:translateY(-2px);
  box-shadow:var(--shadow-1);
}

/* ===== FAQ ===== */
.faq-section{padding:84px 0 72px}
.section-head{margin:0 auto 42px;max-width:680px}
.section-head.center{text-align:center}
.eyebrow{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:7px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.05em;
  color:var(--brand-700);
  background:var(--brand-50);
  border:1px solid var(--brand-100);
  padding:6px 14px;
  border-radius:999px;
  margin-bottom:18px;
}
.section-head h2{font-size:32px;font-weight:700;line-height:1.3;color:var(--text-strong);margin:0 0 12px}
.section-head p{font-size:16px;color:var(--text-muted);margin:0}
.faq-accordion{border-top:1px solid var(--line)}
.accordion-item{
  background:transparent;
  border:0;
  border-bottom:1px solid var(--line);
}
.accordion-item:first-child{border-top:none}
.accordion-header{margin:0;padding:0}
.accordion-button{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  width:100%;
  padding:22px 2px;
  background:transparent;
  border:none;
  box-shadow:none;
  color:var(--text-strong);
  font-size:16px;
  font-weight:600;
  line-height:1.6;
  text-align:left;
  transition:color .18s ease;
}
.accordion-button::after{display:none}
.accordion-button:not(.collapsed){color:var(--text-strong);box-shadow:none}
.accordion-button:hover{color:var(--brand-600)}
.acc-icon{
  position:relative;
  flex:0 0 auto;
  width:20px;
  height:20px;
  border-radius:50%;
  border:1px solid var(--line);
  background:#fff;
  transition:border-color .18s ease,background .18s ease,transform .18s ease;
}
.accordion-button:hover .acc-icon{border-color:var(--brand-100);background:var(--brand-50)}
.acc-icon::before,.acc-icon::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  transform:translate(-50%,-50%);
  background:var(--brand-600);
  border-radius:2px;
}
.acc-icon::before{width:10px;height:2px}
.acc-icon::after{width:2px;height:10px}
.accordion-button:not(.collapsed) .acc-icon{background:var(--brand-50);border-color:var(--brand-100);transform:rotate(45deg)}
.accordion-collapse{border:none}
.accordion-body{padding:2px 42px 24px 2px}
.accordion-body p{margin:0;font-size:15px;color:var(--text-body);line-height:1.85}
.faq-more{
  margin-top:28px;
  display:flex;
  justify-content:center;
}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--brand-600)}
.link-arrow svg{width:15px;height:15px;transition:transform .18s ease}
.link-arrow:hover svg{transform:translateX(4px)}

/* ===== Security strip ===== */
.security-strip{padding:26px 0}
.security-inner{
  display:flex;
  align-items:center;
  gap:18px;
  background:linear-gradient(180deg,rgba(255,255,255,.96),rgba(255,255,255,.88)),url('/assets/images/backpic/back-3.png') center / cover no-repeat;
  border:1px solid var(--line-light);
  border-left:4px solid var(--brand-600);
  border-radius:var(--radius-lg);
  padding:20px 26px;
  box-shadow:var(--shadow-1);
}
.security-icon{
  flex:0 0 auto;
  width:46px;
  height:46px;
  border-radius:50%;
  background:var(--brand-50);
  color:var(--brand-600);
  display:inline-flex;
  align-items:center;
  justify-content:center;
}
.security-icon svg{width:22px;height:22px}
.security-inner p{margin:0;font-size:14px;line-height:1.75;color:var(--text-body)}

/* ===== Timeline ===== */
.timeline-section{padding:70px 0 84px}
.timeline-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:38px;flex-wrap:wrap}
.timeline-head h2{font-size:30px;font-weight:700;color:var(--text-strong);margin:0 0 10px;line-height:1.3}
.timeline-head p{font-size:15px;color:var(--text-muted);margin:0}
.timeline-wrap{
  position:relative;
  margin:0 auto;
  max-width:960px;
  padding-left:26px;
  border-left:1px solid var(--line);
}
.timeline-year{
  position:relative;
  font-size:17px;
  font-weight:700;
  color:var(--text-strong);
  margin:36px 0 16px;
  letter-spacing:.02em;
}
.timeline-year:first-child{margin-top:0}
.timeline-year::before{
  content:"";
  position:absolute;
  left:-31.5px;
  top:8px;
  width:11px;
  height:11px;
  border-radius:50%;
  background:#fff;
  border:3px solid var(--brand-600);
  box-shadow:0 0 0 4px var(--brand-50);
}
.release-list li + li{border-top:1px solid var(--line-light)}
.timeline-row{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:20px;
  padding:17px 6px;
  transition:background .18s ease;
}
.timeline-row:hover{background:var(--surface);border-radius:10px}
.timeline-row .title{color:var(--text-body);font-size:15px;line-height:1.7;transition:color .18s ease}
.timeline-row:hover .title{color:var(--brand-600)}
.timeline-row time{
  flex:0 0 auto;
  font-size:13px;
  color:var(--text-muted);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}

/* ===== Page CTA ===== */
.page-cta{padding:20px 0 96px}
.cta-card{
  background:linear-gradient(180deg,#fff 0%,#F7FAFF 100%);
  border:1px solid var(--brand-100);
  border-radius:var(--radius-xl);
  box-shadow:var(--shadow-2);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:46px 52px;
  overflow:hidden;
  position:relative;
}
.cta-card::before{
  content:"";
  position:absolute;
  right:-70px;
  top:-70px;
  width:220px;
  height:220px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(157,182,228,.22) 0%,rgba(157,182,228,0) 70%);
  pointer-events:none;
}
.cta-card h2{font-size:28px;font-weight:700;color:var(--text-strong);margin:0 0 10px;line-height:1.35}
.cta-card p{font-size:15px;color:var(--text-muted);margin:0;max-width:560px;line-height:1.8}
.cta-card .btn{height:50px;padding:0 30px;flex-shrink:0}

/* ===== Footer ===== */
.site-footer{background:#15233B;color:#AFC0DE;padding:68px 0 0}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:48px}
.footer-brand .brand-text{color:#fff;font-size:18px;font-weight:700;letter-spacing:.02em}
.footer-brand p{margin:16px 0 22px;font-size:14px;line-height:1.85;color:#AFC0DE;max-width:320px}
.footer-brand .btn-brand{height:42px;padding:0 20px;font-size:14px;background:var(--brand-600)}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px;letter-spacing:.03em}
.footer-link-list{display:flex;flex-direction:column;gap:12px}
.footer-link-list a{font-size:14px;color:#AFC0DE;line-height:1.5;transition:color .18s ease}
.footer-link-list a:hover{color:#fff}
.footer-bottom{
  margin-top:56px;
  border-top:1px solid rgba(255,255,255,.08);
  padding:22px 0;
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  font-size:13px;
  color:#8CA1C3;
}

/* ===== Responsive ===== */
@media (max-width:991.98px){
  .desktop-menu{display:none}
  .hamburger-btn{display:inline-flex}
  .login-link{display:none!important}
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .category-hero{padding:60px 0 64px}
  .category-hero h1{font-size:34px}
  .cta-card{flex-direction:column;align-items:flex-start}
  .cta-card .btn{width:auto}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media (max-width:767.98px){
  body{font-size:15px}
  .header-flex{height:66px;gap:14px}
  .brand-text{font-size:16px}
  .brand-mark{width:35px;height:35px}
  .header-actions{gap:8px}
  .header-download-btn{height:38px;padding:0 14px}
  .category-hero{padding:48px 0 52px}
  .hero-grid{gap:30px}
  .category-hero h1{font-size:28px;line-height:1.35}
  .hero-lead{font-size:15px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .section-head h2{font-size:24px}
  .eyebrow{font-size:12px}
  .channel-row{padding:14px 16px}
  .channel-label{width:100%}
  .faq-section{padding:60px 0 52px}
  .accordion-button{font-size:15px;padding:18px 0}
  .accordion-body{padding-right:0}
  .timeline-section{padding:48px 0 64px}
  .timeline-head h2{font-size:24px}
  .timeline-wrap{padding-left:20px}
  .timeline-year::before{left:-26px;width:9px;height:9px}
  .timeline-row{flex-direction:column;gap:2px;padding:14px 4px}
  .timeline-row time,.timeline-row .title{font-size:14px}
  .page-cta{padding:8px 0 64px}
  .cta-card{padding:32px 26px;gap:24px}
  .cta-card h2{font-size:22px}
  .security-inner{padding:18px 18px}
  .security-icon{width:40px;height:40px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (min-width:992px){
  .d-lg-inline-flex{display:inline-flex!important}
}