/* roulang page: index */
:root{
  --brand:#2B6E9E;
  --brand-deep:#1D517C;
  --brand-soft:#6FA9D3;
  --accent:#E8752C;
  --accent-deep:#D4621A;
  --success:#17A673;
  --bg:#F3F7FB;
  --surface:#FFFFFF;
  --ink:#1A2B3C;
  --muted:#576B7E;
  --line:#E2EBF3;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-card:0 1px 2px rgba(28,55,92,.04),0 12px 26px -12px rgba(28,55,92,.08);
  --shadow-hover:0 8px 16px -8px rgba(28,55,92,.08),0 24px 40px -16px rgba(28,55,92,.16);
  --container:1240px;
  --trans:all .28s ease;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
a:focus-visible{outline:2px solid var(--brand-soft);outline-offset:3px;border-radius:6px}
img{max-width:100%;display:block;border:0}
ul,ol{list-style:none}
button,input{font-family:inherit;font-size:inherit}
button:focus-visible,input:focus-visible{outline:2px solid var(--brand-soft);outline-offset:2px}
.container{max-width:var(--container);margin:0 auto;padding-left:24px;padding-right:24px}
@media(max-width:767px){.container{padding-left:16px;padding-right:16px}}

/* ---------- base section ---------- */
.section{padding:88px 0}
.section.soft{background:var(--surface)}
.section-head{max-width:760px;margin:0 auto 56px;text-align:center}
.section-tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 16px;border-radius:100px;
  background:#EAF3FB;color:var(--brand-deep);
  font-size:14px;font-weight:500;letter-spacing:.2px;
  margin-bottom:14px;
}
.section-tag::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent)}
.section-title{
  font-size:32px;line-height:1.35;letter-spacing:-.01em;
  color:var(--brand-deep);font-weight:700;
}
.section-sub{color:var(--muted);font-size:16px;margin-top:14px}
@media(max-width:767px){
  .section{padding:60px 0}
  .section-title{font-size:26px}
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--radius-sm);
  padding:11px 22px;font-size:15px;font-weight:600;
  line-height:1.4;cursor:pointer;white-space:nowrap;
  transition:var(--trans);user-select:none;
}
.btn svg{width:18px;height:18px;flex:0 0 auto}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 20px -8px rgba(232,117,44,.64)}
.btn-primary:hover{background:var(--accent-deep);transform:translateY(-1px);box-shadow:0 14px 24px -10px rgba(212,98,26,.66)}
.btn-primary:active{transform:translateY(0)}
.btn-secondary{background:#fff;color:var(--brand-deep);border-color:#CFE0ED}
.btn-secondary:hover{border-color:var(--brand);background:#F6FAFD;transform:translateY(-1px)}
.btn-secondary:active{transform:translateY(0)}
.btn-brand{background:var(--brand);color:#fff}
.btn-brand:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:0 14px 24px -12px rgba(29,81,124,.5)}
.btn-white{background:#fff;color:var(--brand-deep)}
.btn-white:hover{background:#F2F7FC;transform:translateY(-1px)}
.btn-lg{padding:14px 30px;font-size:16px;border-radius:12px}
.btn-block{width:100%}

/* ---------- header ---------- */
.site-header{
  position:fixed;left:0;right:0;top:0;z-index:80;
  height:68px;background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(226,235,243,.9);
  transition:box-shadow .28s ease,background .28s ease;
}
.site-header.scrolled{box-shadow:0 6px 18px rgba(28,55,92,.07)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:18px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;margin-right:6px}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(145deg,var(--brand),var(--brand-deep));
  display:flex;align-items:center;justify-content:center;
  color:#fff;box-shadow:0 8px 16px -8px rgba(43,110,158,.58);
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.16}
.brand-text strong{font-size:18px;font-weight:700;color:var(--brand-deep);letter-spacing:.2px}
.brand-text small{font-size:11.5px;color:var(--muted);letter-spacing:.4px;margin-top:2px}
.main-nav{display:flex;align-items:center;gap:6px;margin:0 auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  height:56px;padding:0 14px;font-size:15px;font-weight:500;
  color:var(--muted);border-radius:10px;
}
.nav-link:hover{color:var(--brand);background:#F1F7FB}
.nav-link.active{color:var(--brand-deep);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;
  height:3px;border-radius:3px;background:var(--brand);
}
.header-actions{display:flex;align-items:center;gap:14px;flex-shrink:0}
.search{position:relative;width:196px}
.search input{
  width:100%;height:41px;padding:0 16px 0 40px;
  border:1px solid var(--line);border-radius:100px;
  background:#F6FAFD;color:var(--ink);
  transition:var(--trans);font-size:14px;
}
.search input::placeholder{color:#92A4B4}
.search input:focus{background:#fff;border-color:var(--brand-soft);box-shadow:0 0 0 4px rgba(43,110,158,.08)}
.search-icon{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:17px;height:17px;color:#7C93A7;pointer-events:none}
.header-cta{height:40px;padding:0 18px;background:var(--accent);color:#fff;border-radius:10px;font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:7px;transition:var(--trans)}
.header-cta:hover{background:var(--accent-deep);transform:translateY(-1px);box-shadow:0 10px 18px -8px rgba(232,117,44,.7)}
.header-cta svg{width:16px;height:16px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;
  border:1px solid var(--line);background:#fff;
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{
  display:block;width:20px;height:2px;background:var(--brand-deep);border-radius:4px;
  position:relative;transition:var(--trans);
}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--brand-deep);border-radius:4px;transition:var(--trans)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:120;
  width:min(82vw,330px);background:#fff;box-shadow:-18px 0 50px rgba(28,55,92,.14);
  transform:translateX(102%);transition:transform .34s ease;
  padding:28px 24px;display:flex;flex-direction:column;gap:26px;
}
.mobile-drawer.open{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:22px;color:var(--muted);line-height:1}
.drawer-search input{
  width:100%;height:44px;border-radius:100px;
  border:1px solid var(--line);background:#F6FAFD;
  padding:0 16px;font-size:14px;
}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{
  display:block;padding:13px 12px;border-radius:12px;
  color:var(--muted);font-size:16px;font-weight:500;
}
.drawer-nav a:hover{background:#F1F7FB;color:var(--brand)}
.drawer-nav a.active{background:#EAF3FB;color:var(--brand-deep);font-weight:600}
.mobile-drawer .btn{margin-top:auto}
.drawer-mask{position:fixed;inset:0;z-index:110;background:rgba(26,43,60,.4);opacity:0;visibility:hidden;transition:var(--trans)}
.drawer-mask.show{opacity:1;visibility:visible}
@media(max-width:1100px){
  .search{display:none}
}
@media(max-width:860px){
  .main-nav{display:none}
  .header-cta{display:none}
  .nav-toggle{display:inline-flex}
  .header-actions{gap:8px}
}

/* ---------- mobile fixed download bar ---------- */
.mobile-small-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  height:64px;background:#fff;display:none;
  align-items:center;gap:10px;
  padding:8px max(24px,calc((100vw - 100%) / 2)) 8px calc((100vw - 100%) / 2);
  box-shadow:0 -8px 24px rgba(28,55,92,.09);
  max-width:760px;margin:0 auto;
}
.mobile-small-bar .bar-brand{display:flex;align-items:center;gap:8px;min-width:0;flex:1}
.mobile-small-bar .bar-brand svg{width:18px;height:18px;color:var(--success);flex:0 0 auto}
.mobile-small-bar .bar-brand strong{font-size:13px;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block}
.mobile-small-bar .bar-brand small{font-size:11px;color:var(--muted);display:block}
.mobile-small-bar .btn{border-radius:100px;height:40px;padding:0 18px;font-size:14px;flex-shrink:0}
@media(max-width:767px){
  body{padding-bottom:64px}
  .mobile-small-bar{display:flex;left:50%;transform:translateX(-50%);width:100%}
}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:88px 0 76px;
  background:
    radial-gradient(circle at 84% 12%,rgba(111,169,211,.18),transparent 36%),
    radial-gradient(circle at 12% 88%,rgba(23,166,115,.1),transparent 30%),
    linear-gradient(180deg,#EDF5FD 0%,#F6FAFD 68%,#F3F7FB 100%);
}
.hero::before{
  content:"";position:absolute;right:-140px;top:-120px;width:460px;height:460px;
  background:radial-gradient(circle,rgba(111,169,211,.13),transparent 65%);
  pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:70px;align-items:center;position:relative}
.hero-copy{position:relative;z-index:2}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.84);border:1px solid #CFE3F1;
  padding:7px 15px;border-radius:100px;
  color:var(--brand-deep);font-size:14px;font-weight:500;
}
.hero-eyebrow svg{width:15px;height:15px;color:var(--success)}
.hero h1{
  font-size:46px;line-height:1.3;letter-spacing:-.015em;
  color:var(--brand-deep);font-weight:800;margin:22px 0 16px;
  max-width:620px;
}
.hero-sub{color:var(--muted);font-size:17px;line-height:1.85;max-width:580px;margin-bottom:28px}
.hero-sub strong{color:var(--brand-deep);font-weight:600}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.chip-link{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 16px;border-radius:100px;background:#fff;
  border:1px solid var(--line);color:var(--muted);
  font-size:14px;transition:var(--trans);
}
.chip-link:hover{border-color:var(--brand-soft);color:var(--brand-deep);box-shadow:0 8px 18px -10px rgba(43,110,158,.2);transform:translateY(-1px)}
.hero-safe{margin-top:24px;display:flex;flex-wrap:wrap;gap:8px 20px;color:var(--muted);font-size:13.5px}
.hero-safe li{display:flex;align-items:center;gap:7px}
.hero-safe svg{width:15px;height:15px;color:var(--success)}
.hero-visual{position:relative;padding:0 18px}
.mock-wrap{
  position:relative;max-width:260px;margin-left:auto;margin-right:14px;
  animation:float 5s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.mock-phone{
  background:#fff;border:9px solid #DCE9F3;border-radius:38px;
  box-shadow:0 28px 60px -18px rgba(29,81,124,.44),0 0 0 1px rgba(29,81,124,.08);
  overflow:hidden;aspect-ratio:9/17;
}
.mock-phone img{width:100%;height:100%;object-fit:cover}
.hero-float-card{
  position:absolute;right:0;left:auto;bottom:46px;
  min-width:196px;background:rgba(255,255,255,.94);
  border:1px solid var(--line);border-radius:16px;
  padding:16px;box-shadow:var(--shadow-hover);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.hero-float-card strong{display:flex;align-items:center;gap:7px;font-size:14px;color:var(--ink)}
.hero-float-card strong svg{width:16px;height:16px;color:var(--success)}
.hero-float-card span{display:block;font-size:12px;color:var(--muted);margin-top:4px}
.hero-badge-top{
  position:absolute;top:10px;left:-4px;z-index:3;
  background:var(--brand-deep);color:#fff;
  border-radius:100px;padding:8px 16px;font-size:13px;font-weight:500;
  display:flex;align-items:center;gap:6px;box-shadow:0 10px 18px -8px rgba(29,81,124,.65);
}
.hero-badge-top svg{width:15px;height:15px;color:#9ED6BF}
@media(max-width:992px){
  .hero-grid{grid-template-columns:1fr;gap:58px}
  .hero h1{font-size:38px}
  .mock-wrap{margin:0 auto}
}
@media(max-width:767px){
  .hero{padding:64px 0 56px}
  .hero h1{font-size:32px}
  .hero-sub{font-size:15.5px}
  .mock-wrap{max-width:230px}
}

/* ---------- stat strip ---------- */
.stat-band{border-bottom:1px solid var(--line);background:rgba(255,255,255,.76)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;padding:26px 0}
.stat-item{display:flex;align-items:center;gap:15px;padding:10px 18px;border-left:1px solid var(--line)}
.stat-item:first-child{border-left:0;padding-left:6px}
.stat-ico{width:44px;height:44px;flex:0 0 auto;border-radius:14px;display:flex;align-items:center;justify-content:center}
.stat-ico svg{width:21px;height:21px}
.stat-ico.blue{background:#E7F1FA;color:var(--brand)}
.stat-ico.green{background:#E0F5ED;color:var(--success)}
.stat-ico.orange{background:#FCE9DE;color:var(--accent)}
.stat-ico.cyan{background:#E3F2F7;color:#248A93}
.stat-item strong{display:block;font-size:16px;color:var(--ink);font-weight:700;line-height:1.35}
.stat-item span{font-size:13px;color:var(--muted)}
@media(max-width:992px){
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .stat-item:nth-child(3){border-left:0}
}
@media(max-width:767px){
  .stat-item{padding:10px 8px}
  .stat-ico{width:38px;height:38px;border-radius:10px}
  .stat-item strong{font-size:15px}
}

/* ---------- features ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature-card{
  background:var(--surface);border-radius:var(--radius-lg);
  padding:26px 24px;border:1px solid var(--line);
  box-shadow:var(--shadow-card);transition:var(--trans);
}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#C8DDEB}
.feature-icon{width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:17px}
.feature-icon svg{width:23px;height:23px}
.feature-icon.blue{background:#E7F1FA;color:var(--brand)}
.feature-icon.deep{background:#E2EAF2;color:var(--brand-deep)}
.feature-icon.green{background:#E0F5ED;color:var(--success)}
.feature-icon.orange{background:#FCE9DE;color:var(--accent)}
.feature-card h3{font-size:18px;font-weight:700;color:var(--ink);line-height:1.5;margin-bottom:10px}
.feature-card p{color:var(--muted);font-size:14.5px;line-height:1.75}
@media(max-width:1100px){.feature-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){
  .feature-grid{grid-template-columns:1fr}
  .feature-card{padding:22px 20px}
}

/* ---------- showcase slider ---------- */
.screens-section{background:#fff;border-top:1px solid var(--line)}
.showcase-shell{
  background:linear-gradient(150deg,#EFF5FB,#E7F1FA);
  border:1px solid #DCECF7;border-radius:28px;
  padding:28px;position:relative;overflow:hidden;
}
.screens-track{position:relative;max-width:950px;margin:0 auto}
.screen-list{display:flex;overflow:hidden;border-radius:22px;gap:0}
.screen-item{
  flex:0 0 100%;min-width:100%;
  opacity:1;border-radius:22px;display:none;
  box-shadow:0 20px 50px -16px rgba(28,55,92,.22);
  background:#fff;
}
.screen-item.active{display:block;animation:fadeSlide .56s ease}
@keyframes fadeSlide{
  from{opacity:0;transform:translateX(18px)}
  to{opacity:1;transform:translateX(0)}
}
.screen-item img{width:100%;height:520px;object-fit:cover;border-radius:22px}
.screen-nav{
  position:absolute;top:50%;transform:translateY(-50%);z-index:5;
  width:46px;height:46px;border-radius:50%;border:1px solid var(--line);
  background:#fff;color:var(--brand-deep);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 20px -8px rgba(28,55,92,.16);
  transition:var(--trans);
}
.screen-nav:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
.screen-nav.prev{left:-6px}
.screen-nav.next{right:-6px}
.screen-nav svg{width:20px;height:20px}
.screen-dots{display:flex;justify-content:center;gap:9px;margin-top:22px}
.screen-dots button{
  width:10px;height:10px;border-radius:100px;border:0;cursor:pointer;
  background:#C5D9E8;transition:var(--trans);padding:0;
}
.screen-dots button.active{width:28px;background:var(--brand)}
@media(max-width:767px){
  .screens-section{padding:64px 0}
  .showcase-shell{padding:14px;border-radius:20px}
  .screen-item img{height:auto;min-height:200px;object-fit:cover}
  .screen-nav{width:36px;height:36px}
  .screen-nav.prev{left:-8px}
  .screen-nav.next{right:-8px}
}

/* ---------- category channels ---------- */
.channel-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:28px;display:flex;gap:22px;align-items:flex-start;
  box-shadow:var(--shadow-card);transition:var(--trans);
}
.channel-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.channel-ico{width:64px;height:64px;border-radius:18px;flex:0 0 auto;display:flex;align-items:center;justify-content:center;color:#fff}
.channel-ico svg{width:30px;height:30px}
.channel-ico.download{background:linear-gradient(145deg,var(--brand),var(--brand-deep))}
.channel-ico.help{background:linear-gradient(145deg,#35B08D,#17A673)}
.channel-card h3{font-size:18px;color:var(--ink)}
.channel-card p{color:var(--muted);font-size:14.5px;line-height:1.8;margin-top:6px}
.channel-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--brand);margin-top:12px;transition:var(--trans)}
.channel-link:hover{color:var(--accent);gap:10px}
@media(max-width:700px){.channel-card{padding:22px;flex-direction:column;gap:14px}}

/* ---------- requirements ---------- */
.req-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:stretch}
.req-card{
  border:1px solid var(--line);border-radius:22px;background:#fff;
  padding:30px 28px;box-shadow:var(--shadow-card);transition:var(--trans);
}
.req-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.req-card-header{display:flex;align-items:center;gap:14px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.req-ico{width:52px;height:52px;border-radius:15px;display:flex;align-items:center;justify-content:center}
.req-ico.ios{background:#E3EBF4;color:var(--brand-deep)}
.req-ico.android{background:#E0F5ED;color:var(--success)}
.req-card-header h3{font-size:19px}
.req-card-header span{font-size:13.5px;color:var(--muted)}
.req-list{padding-top:8px;display:grid;gap:4px}
.req-item{display:flex;gap:11px;align-items:flex-start;padding:10px 0;border-bottom:1px dashed #E8F0F6}
.req-item:last-child{border:0}
.req-item svg{width:18px;height:18px;color:var(--success);flex:0 0 auto;margin-top:5px}
.req-item strong{display:block;font-size:14.5px;color:var(--ink);font-weight:600}
.req-item span{font-size:13.5px;color:var(--muted);line-height:1.65}
.req-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:14px;margin-top:20px;font-weight:500}
.req-link:hover{color:var(--accent)}
@media(max-width:767px){.req-grid{grid-template-columns:1fr}}

/* ---------- reviews ---------- */
.review-wrap{display:grid;grid-template-columns:290px 1fr;gap:26px}
.rating-card{
  background:linear-gradient(150deg,var(--brand) 10%,var(--brand-deep) 92%);
  color:#fff;border-radius:22px;padding:30px 26px;height:100%;
  box-shadow:0 22px 48px -18px rgba(29,81,124,.6);
}
.rating-card .score{font-size:52px;font-weight:800;line-height:1;letter-spacing:-.02em}
.rating-card .score small{font-size:17px;font-weight:500;opacity:.85;margin-left:3px}
.rating-stars{display:flex;gap:3px;color:#FFC65D;margin:12px 0 6px}
.rating-stars svg{width:18px;height:18px}
.rating-card p{color:rgba(255,255,255,.84);font-size:13.5px;line-height:1.7}
.bar-item{display:grid;grid-template-columns:32px 1fr 38px;gap:10px;align-items:center;margin-top:9px;font-size:12px;color:rgba(255,255,255,.84)}
.bar-track{height:6px;border-radius:100px;background:rgba(255,255,255,.2);overflow:hidden}
.bar-fill{height:100%;border-radius:100px;background:#FFC65D}
.bar-item em{font-style:normal;text-align:right}
.review-list{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.review-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px;box-shadow:var(--shadow-card);transition:var(--trans);
  position:relative;
}
.review-card::before{
  content:"”";position:absolute;right:18px;top:4px;
  font-size:60px;line-height:1;color:#DCEBIF;color:#DCECF5;font-family:Georgia,serif;
}
.review-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.avatar{
  width:42px;height:42px;border-radius:50%;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  font-weight:600;color:#fff;background:var(--brand);font-size:15px;
}
.avatar.green{background:#27A77A}
.avatar.orange{background:#EA8A4A}
.avatar.purple{background:#5B79B8}
.review-head .name{font-size:14px;font-weight:600}
.review-head .date{font-size:12px;color:var(--muted)}
.review-card p{color:var(--muted);font-size:14px;line-height:1.8}
@media(max-width:1080px){.review-wrap{grid-template-columns:1fr}}
@media(max-width:767px){.review-list{grid-template-columns:1fr}}

/* ---------- news / cms ---------- */
.news-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:30px}
.news-empty{
  grid-column:1/-1;background:#fff;border:1px dashed #BBD8EB;color:var(--muted);
  border-radius:20px;padding:46px 20px;text-align:center;font-size:15px;
  display:flex;flex-direction:column;align-items:center;gap:12px;
}
.news-empty svg{width:42px;height:42px;color:var(--brand-soft)}
.feature-post{
  background:#fff;border:1px solid var(--line);border-radius:20px;
  overflow:hidden;height:100%;display:flex;flex-direction:column;
  box-shadow:var(--shadow-card);transition:var(--trans);
}
.feature-post:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.feature-post-cover{position:relative;overflow:hidden;min-height:230px;max-height:270px}
.feature-post-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.feature-post:hover .feature-post-cover img{transform:scale(1.04)}
.feature-post-body{padding:26px;display:flex;flex-direction:column;flex:1}
.feature-post-tags,.news-meta-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.tag{
  display:inline-block;background:#EAF3FB;color:var(--brand);
  padding:3px 11px;border-radius:100px;font-size:12px;letter-spacing:.2px;
}
.tag.green{background:#E0F5ED;color:var(--success)}
.tag.orange{background:#FCE9DE;color:var(--accent)}
.feature-post h3{font-size:20px;line-height:1.6}
.feature-post-body p{color:var(--muted);font-size:14.5px;line-height:1.8;margin-top:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.feature-post-foot{margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between}
.post-link{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:14px;font-weight:500;
  transition:var(--trans);
}
.post-link:hover{color:var(--accent);gap:10px}
.post-date{color:var(--muted);font-size:13px}
.news-list{display:flex;flex-direction:column;gap:0}
.news-row{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:20px;transition:var(--trans);display:block;
  border-bottom:2px solid transparent;
  box-shadow:0 1px 4px rgba(28,55,92,.02),0 8px 24px -14px rgba(28,55,92,.08);
}
.news-row:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#CBDFEC}
.news-row + .news-row{margin-top:14px}
.news-row-top{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap}
.news-row h3{font-size:17px;color:var(--ink);line-height:1.55;font-weight:600}
.news-row p{color:var(--muted);font-size:13.5px;line-height:1.7;margin-top:7px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-row-foot{display:flex;align-items:center;gap:8px;margin-top:12px;flex-wrap:wrap}
.news-meta-date{font-size:12px;color:var(--muted)}
@media(max-width:992px){.news-layout{grid-template-columns:1fr}}

/* ---------- faq ---------- */
.faq-panel{max-width:860px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  margin-bottom:14px;box-shadow:0 1px 2px rgba(28,55,92,.03);
  transition:var(--trans);overflow:hidden;
}
.faq-item:hover{border-color:#C8DDEB}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:16px;
  padding:20px 22px;font-weight:600;color:var(--ink);font-size:15.5px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .faq-ico{
  width:30px;height:30px;border-radius:100px;background:#ECF4FA;color:var(--brand);
  display:flex;align-items:center;justify-content:center;flex:0 0 auto;
  transition:var(--trans);
}
.faq-item summary .faq-ico svg{width:14px;height:14px}
.faq-item[open] .faq-ico{background:var(--brand);color:#fff;transform:rotate(45deg)}
.faq-item .faq-body{padding:0 22px 22px 68px;color:var(--muted);font-size:14.5px;line-height:1.8}
@media(max-width:600px){
  .faq-item summary{padding:17px 16px;gap:12px}
  .faq-item .faq-body{padding:0 18px 20px 58px}
}

/* ---------- final CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:30px;
  color:#fff;padding:74px 52px;
  background:
    linear-gradient(110deg,rgba(21,63,98,.94) 12%,rgba(29,81,124,.92) 58%,rgba(43,110,158,.85) 100%),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  box-shadow:0 30px 60px -20px rgba(20,52,82,.5);
}
.cta-band::after{content:"";position:absolute;right:-70px;bottom:-80px;width:280px;height:280px;background:rgba(244,255,255,.12);border-radius:50%;pointer-events:none}
.cta-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:46px;align-items:center;position:relative;z-index:2}
.cta-band h2{font-size:32px;line-height:1.45;letter-spacing:-.01em;color:#fff;margin-bottom:14px}
.cta-band p{color:rgba(255,255,255,.86);max-width:540px;font-size:15.5px}
.cta-actions{display:flex;gap:14px;margin-top:24px;flex-wrap:wrap}
.cta-qr{background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.24);border-radius:22px;padding:22px;display:flex;gap:18px;align-items:center;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.cta-qr-code{
  width:92px;height:92px;background:#fff;border-radius:14px;flex:0 0 auto;
  display:grid;grid-template-columns:repeat(6,1fr);grid-template-rows:repeat(6,1fr);
  gap:3px;padding:7px;
}
.cta-qr-code i{background:#142B3D;border-radius:1px}
.cta-qr-code i:nth-child(odd){background:#172C3E}
.cta-qr-code i:nth-child(2n){background:#fff}
.cta-qr-code i:nth-child(3n+1){background:#1A3448}
.cta-qr span{color:#fff;font-size:15px;font-weight:600}
.cta-qr small{color:rgba(255,255,255,.82);font-size:12px;display:block;margin-top:4px}
.cta-note{display:block;margin-top:16px;color:rgba(255,255,255,.72);font-size:12.5px}
@media(max-width:992px){.cta-grid{grid-template-columns:1fr}}
@media(max-width:767px){
  .cta-band{border-radius:22px;padding:44px 26px}
  .cta-band h2{font-size:25px}
  .cta-qr{flex-direction:column;text-align:center}
}

/* ---------- footer ---------- */
.site-footer{background:#E8F0F6;border-top:1px solid #D6E4EE;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.3fr .8fr .9fr 1fr;gap:44px;padding-bottom:40px}
.footer-brand p{font-size:14px;color:var(--muted);line-height:1.9;margin-top:16px;max-width:330px}
.footer-brand .brand-text small{color:var(--muted)}
.footer-column h4{font-size:15px;color:var(--brand-deep);margin-bottom:16px;letter-spacing:.2px}
.footer-column ul{display:grid;gap:10px}
.footer-column li{font-size:14px}
.footer-column a{color:var(--muted);transition:var(--trans);display:inline-flex;align-items:center;gap:6px}
.footer-column a:hover{color:var(--brand)}
.footer-column a svg{width:13px;height:13px;opacity:.6}
.footer-bottom{
  border-top:1px solid #D6E4EE;padding:24px 0;color:var(--muted);font-size:13px;
}
.footer-bottom-inner{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.footer-bottom a{color:var(--muted);margin-left:16px}
.footer-bottom a:hover{color:var(--brand)}
@media(max-width:1080px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.footer-grid{grid-template-columns:1fr;gap:30px}}

/* ---------- helper / utility ---------- */
.center{text-align:center}
.mt-20{margin-top:20px}
.mb-20{margin-bottom:20px}
.small-note{font-size:13px;color:var(--muted)}
.flex-center{display:flex;align-items:center;justify-content:center}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
@media(max-width:600px){.grid-2{grid-template-columns:1fr}}
.section-hr{border:0;border-top:1px solid var(--line)}

/* roulang page: category1 */
:root{
  --brand:#2B6E9E;
  --brand-deep:#1D517C;
  --brand-soft:#6FA9D3;
  --brand-mist:#EAF1F7;
  --action:#E8752C;
  --action-deep:#D4621A;
  --success:#17A673;
  --bg:#F3F7FB;
  --card:#FFFFFF;
  --text:#1A2B3C;
  --text-sub:#576B7E;
  --line:#E2EBF3;
  --radius-card:16px;
  --radius-sm:12px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(28,55,92,.04),0 12px 26px -12px rgba(28,55,92,.08);
  --shadow-hover:0 8px 16px -8px rgba(28,55,92,.08),0 24px 40px -16px rgba(28,55,92,.16);
  --space-section:96px;
  --space-section-md:64px;
  --space-section-sm:40px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
body.nav-open{overflow:hidden}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-deep)}
button,input{font-family:inherit}
input:focus{outline:none}
.container{max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:var(--space-section) 0}
@media(max-width:1024px){.section{padding:var(--space-section-md) 0}}
.section-header{text-align:center;max-width:820px;margin:0 auto 52px}
.section-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--brand);background:#E4EFF8;padding:7px 16px;border-radius:999px}
.section-title{font-size:32px;line-height:1.3;font-weight:700;color:var(--brand-deep);margin:14px 0 12px;letter-spacing:-.01em}
.section-desc{font-size:16px;color:var(--text-sub);margin:0}
@media(max-width:767px){.section-title{font-size:26px}.section-header{margin-bottom:36px}}

/* header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;height:68px;background:rgba(255,255,255,.93);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid rgba(226,235,243,.8);transition:box-shadow .3s ease}
.site-header.scrolled{box-shadow:0 6px 20px -12px rgba(29,81,124,.2)}
.header-inner{height:68px;display:flex;align-items:center;justify-content:space-between;gap:18px;position:relative}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:38px;height:38px;border-radius:11px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 6px 14px -6px rgba(43,110,158,.45)}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text strong{font-size:16px;font-weight:800;color:var(--brand-deep);letter-spacing:.02em}
.brand-text small{font-size:11px;color:var(--brand-soft);font-weight:600;letter-spacing:.12em;margin-top:3px}
.main-nav{display:flex;align-items:center;gap:6px;background:#F4F8FC;padding:5px;border-radius:999px}
.main-nav .nav-link{display:block;padding:7px 18px;font-size:14px;font-weight:600;color:var(--text-sub);border-radius:999px;transition:background .2s ease,color .2s ease}
.main-nav .nav-link:hover{color:var(--brand-deep)}
.main-nav .nav-link.active{background:#fff;color:var(--brand-deep);box-shadow:0 2px 8px rgba(29,81,124,.12)}
.header-actions{display:flex;align-items:center;gap:10px}
.search{display:flex;align-items:center;background:#F4F8FC;border-radius:999px;padding:0 6px 0 14px;border:1px solid transparent;transition:border-color .2s ease,background .2s ease;position:relative}
.search:focus-within{background:#fff;border-color:var(--brand-soft)}
.search-icon{width:16px;height:16px;color:#8da6bc;flex-shrink:0}
.search input{background:transparent;border:0;width:150px;padding:9px 6px;font-size:14px;color:var(--text)}
.search input::placeholder{color:#9BB0C4}
.search input::-webkit-search-cancel-button{display:none}
.header-cta{display:inline-flex;align-items:center;gap:6px;background:var(--action);color:#fff;font-size:14px;font-weight:700;border-radius:999px;padding:10px 20px;border:none;cursor:pointer;box-shadow:0 4px 14px -4px rgba(232,117,44,.5);transition:background .2s ease,box-shadow .2s ease,transform .2s ease}
.header-cta:hover{background:var(--action-deep);color:#fff;transform:translateX(2px)}
.header-cta svg{width:16px;height:16px}
.nav-toggle{display:none;background:transparent;border:1px solid var(--line);border-radius:10px;width:42px;height:42px;cursor:pointer;position:relative;align-items:center;justify-content:center;flex-direction:column;gap:4px}
.nav-toggle span,.nav-toggle::before,.nav-toggle::after{content:"";display:block;width:18px;height:2px;background:var(--brand-deep);border-radius:4px;transition:transform .3s ease,opacity .3s ease}
.nav-toggle::before{transform:translateY(-7px)}
.nav-toggle::after{transform:translateY(5px)}
.nav-toggle.active::before{transform:rotate(45deg)}
.nav-toggle.active span{opacity:0}
.nav-toggle.active::after{transform:rotate(-45deg)}
@media(max-width:1024px){
  .main-nav,.header-actions .search{display:none}
  .nav-toggle{display:flex}
  .mobile-menu .main-nav{display:flex;flex-direction:column}
}
.mobile-menu{display:none;position:fixed;top:68px;left:0;right:0;bottom:0;background:#fff;z-index:99;padding:28px 24px;overflow-y:auto}
.mobile-menu.open{display:block}
.mobile-menu .main-nav{display:flex;flex-direction:column;align-items:stretch;background:transparent;padding:0;border-radius:0;gap:4px}
.mobile-menu .main-nav .nav-link{display:block;padding:15px 16px;background:#F7FAFD;border-radius:14px;color:var(--text);font-size:16px}
.mobile-menu .main-nav .nav-link.active{color:var(--brand-deep);font-weight:700}
.mobile-menu .search{display:flex;margin-top:20px;border:1px solid var(--line)}
.mobile-menu .search input{width:100%}
.mobile-menu .mobile-menu-cta{margin-top:16px;display:flex}
body.pushed-for-drawer{padding-bottom:0}

/* hero category */
.category-hero{position:relative;padding:172px 0 80px;background:linear-gradient(135deg,#DDEBF6 0%,#F3F7FB 58%,#E7F0F7 100%);overflow:hidden}
.category-hero::before{content:"";position:absolute;width:720px;height:520px;right:-160px;top:-120px;background:radial-gradient(circle at center,rgba(111,169,211,.22) 0,transparent 68%);pointer-events:none}
.category-hero::after{content:"";position:absolute;bottom:0;left:0;right:0;height:34px;background:linear-gradient(180deg,transparent,#F3F7FB)}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.hero-copy .hero-tag{display:inline-flex;align-items:center;gap:8px;background:rgba(43,110,158,.12);color:var(--brand-deep);font-weight:600;font-size:13px;border-radius:999px;padding:7px 16px;margin-bottom:22px;letter-spacing:.02em}
.hero-tag::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 0 4px rgba(23,166,115,.15)}
.hero-copy h1{font-size:48px;line-height:1.18;letter-spacing:-.02em;color:var(--brand-deep);margin:0 0 20px;font-weight:800}
.hero-copy .lead{font-size:17px;color:var(--text-sub);max-width:560px;margin:0 0 28px}
.hero-badges{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.hero-badges span{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 15px;font-size:13px;font-weight:600;color:var(--text-sub);box-shadow:0 2px 6px -2px rgba(29,81,124,.08)}
.hero-badges svg{width:15px;height:15px;color:var(--success)}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;font-weight:700;font-size:14px;border:0;cursor:pointer;transition:all .22s ease;line-height:1}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--action);color:#fff;padding:15px 28px;box-shadow:0 8px 18px -8px rgba(232,117,44,.6)}
.btn-primary:hover{background:var(--action-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 22px -8px rgba(232,117,44,.6)}
.btn-secondary{background:#fff;color:var(--brand-deep);border:1.5px solid var(--brand-soft);padding:15px 28px}
.btn-secondary:hover{background:#F0F7FD;border-color:var(--brand);transform:translateY(-2px);box-shadow:0 6px 16px -6px rgba(43,110,158,.18);color:var(--brand-deep)}
.hero-panel{background:rgba(255,255,255,.96);border-radius:26px;padding:30px;box-shadow:var(--shadow-card);overflow:hidden;backdrop-filter:blur(6px)}
.mobile-frame{width:100%;max-width:250px;margin:0 auto;background:#16212E;border-radius:28px;padding:14px 10px 28px;box-shadow:0 24px 50px -18px rgba(29,81,124,.35)}
.mobile-screen{border-radius:20px;overflow:hidden;background:#fff}
.mobile-screen img{width:100%;height:auto;aspect-ratio:9/19;object-fit:cover}
.hero-float-card{margin-top:16px;text-align:center;background:rgba(111,169,211,.10);border:1px solid rgba(111,169,211,.22);border-radius:16px;padding:12px 16px;display:flex;align-items:center;gap:12px;justify-content:center}
.float-avatar{width:34px;height:34px;border-radius:12px;background:var(--brand);display:flex;align-items:center;justify-content:center;color:#fff}
.float-avatar svg{width:17px;height:17px}
.hero-float-card small{display:block;font-size:12px;color:var(--text-sub)}
.hero-float-card strong{font-size:14px;color:var(--brand-deep)}
@media(max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:40px;text-align:center}
  .hero-copy .lead{margin-left:auto;margin-right:auto}
  .hero-btns{justify-content:center}
  .category-hero{padding-top:150px}
  .hero-panel{max-width:420px;margin:0 auto}
}
@media(max-width:767px){
  .category-hero{padding:130px 0 56px}
  .hero-copy h1{font-size:33px}
  .hero-copy .lead{font-size:15px}
}

/* channel cards */
.channel-section{position:relative;z-index:1}
.channel-section .section-header{text-align:left;max-width:760px}
.channel-section .section-header .section-eyebrow{background:#EDF5FB}
.channel-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.channel-card{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;padding:10px;box-shadow:var(--shadow-card);transition:transform .3s ease,box-shadow .3s ease}
.channel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.channel-media{height:180px;border-radius:13px;overflow:hidden;background:#EAF1F7;margin-bottom:12px}
.channel-media img{width:100%;height:100%;object-fit:cover}
.channel-body{padding:18px 10px 14px}
.channel-body .channel-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.channel-body h3{font-size:22px;color:var(--brand-deep);font-weight:700;margin:0}
.channel-body p{font-size:14px;color:var(--text-sub);margin:8px 0 14px}
.platform-badge{font-size:12px;font-weight:700;color:var(--brand);background:#E7F0F8;border-radius:999px;padding:4px 12px;white-space:nowrap}
.channel-list{list-style:none;margin:0 0 16px;padding:0;display:grid;gap:8px}
.channel-list li{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text)}
.channel-list li::before{content:"✓";width:20px;height:20px;border-radius:6px;background:#EAF8F2;color:var(--success);font-weight:700;display:inline-flex;align-items:center;justify-content:center;font-size:12px;flex-shrink:0}
.channel-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:700;color:var(--action);transition:gap .2s ease}
.channel-link:hover{color:var(--action-deep);gap:10px}
.channel-link svg{width:16px;height:16px}
@media(max-width:1024px){.channel-grid{grid-template-columns:1fr 1fr}.channel-body h3{font-size:19px}}
@media(max-width:767px){.channel-grid{grid-template-columns:1fr}.channel-media{height:160px}}

/* prep */
.prep-section{background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat rgba(23,45,71,.82);position:relative}
.prep-section::before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,rgba(27,65,102,.93) 0%,rgba(29,81,124,.86) 60%,rgba(43,110,158,.9) 100%)}
.prep-section .container,.prep-section .section-header{position:relative;z-index:1}
.prep-section .section-title{color:#fff}
.prep-section .section-desc{color:rgba(255,255,255,.82)}
.prep-section .section-eyebrow{background:rgba(255,255,255,.14);color:#DCEBF8}
.prep-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.prep-item{background:rgba(255,255,255,.1);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:24px;transition:background .25s ease,transform .25s ease}
.prep-item:hover{background:rgba(255,255,255,.16);transform:translateY(-3px)}
.prep-icon{width:44px;height:44px;border-radius:13px;background:rgba(255,255,255,.2);margin-bottom:16px;display:flex;align-items:center;justify-content:center;color:#fff}
.prep-icon svg{width:21px;height:21px}
.prep-item h3{font-size:16px;font-weight:700;color:#fff;margin:0 0 8px}
.prep-item p{font-size:13px;line-height:1.6;color:rgba(255,255,255,.82);margin:0}
@media(max-width:1024px){.prep-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:767px){.prep-grid{grid-template-columns:1fr}}

/* steps */
.steps-section{padding:var(--space-section) 0}
.steps-wrap{max-width:860px;margin:0 auto}
.step-flow{position:relative;display:grid;grid-template-columns:150px 1fr;gap:20px 40px}
.step-flow::before{content:"";position:absolute;left:65px;top:12px;bottom:12px;width:2px;background:repeating-linear-gradient(to bottom,var(--brand-soft) 0 6px,transparent 6px 14px);opacity:.45}
.step-item{background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px 28px;box-shadow:var(--shadow-card);transition:transform .3s ease,box-shadow .3s ease;position:relative}
.step-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.step-num{display:flex;align-items:center;justify-content:center;width:60px;height:60px;border-radius:18px;background:var(--brand);color:#fff;font-size:20px;font-weight:800;letter-spacing:.02em;box-shadow:0 8px 18px -10px rgba(43,110,158,.35);position:relative;z-index:1}
.step-body h3{font-size:20px;color:var(--brand-deep);font-weight:700;margin:0 0 8px}
.step-body p{margin:0;font-size:15px;color:var(--text-sub)}
.step-item .step-inner{display:flex;align-items:flex-start;gap:20px}
@media(max-width:767px){
  .step-flow{grid-template-columns:1fr;gap:18px}
  .step-flow::before{display:none}
  .step-item{padding:20px}
  .step-item .step-inner{flex-direction:column;gap:12px}
  .step-num{width:48px;height:48px;border-radius:14px;font-size:17px}
}

/* verify panel */
.verify-section{background:#EAF1F7;overflow:hidden}
.verify-card{display:grid;grid-template-columns:.9fr 1.1fr;gap:0;background:#fff;border-radius:24px;overflow:hidden;box-shadow:var(--shadow-card)}
.verify-left{background:linear-gradient(150deg,rgba(222,235,246,.9) 0%,#fff 70%);padding:46px 42px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;border-right:1px solid var(--line)}
.qr-box{width:176px;height:176px;background:#fff;border:1px dashed var(--brand-soft);border-radius:18px;display:flex;align-items:center;justify-content:center;box-shadow:inset 0 0 0 6px #F5F9FD;margin:18px auto 18px}
.qr-placeholder{width:164px;height:164px;border-radius:14px;display:flex;align-items:center;justify-content:center;flex-direction:column;color:var(--brand);font-size:13px;background:url("data:image/svg+xml,%3Csvg width='46' height='46' viewBox='0 0 46 46' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M8 8h12v12H8zM26 8h12v12H26zM8 26h12v12H8zM26 30h4v4h-4zM34 26h4v4h-4zM30 34h4v4h-4z' fill='%236FA9D3'/%3E%3Crect x='22' y='22' width='2' height='2' fill='%232B6E9E'/%3E%3Crect x='12' y='12' width='4' height='4' fill='%236FA9D3'/%3E%3Crect x='30' y='12' width='4' height='4' fill='%236FA9D3'/%3E%3Crect x='12' y='30' width='4' height='4' fill='%236FA9D3'/%3E%3C/svg%3E") center/80px no-repeat #fff}
.qr-box small{color:#93ADC4;font-size:12px;margin-top:8px}
.verify-left span{font-size:14px;font-weight:600;color:var(--brand-deep)}
.verify-left em{font-size:12px;font-style:normal;color:var(--text-sub);margin-top:4px}
.verify-right{padding:46px 42px}
.verify-right h2{font-size:27px;color:var(--brand-deep);margin:0 0 8px;font-weight:800}
.verify-right > p{font-size:15px;color:var(--text-sub);margin:0 0 28px}
.verify-list{list-style:none;margin:0 0 28px;padding:0;display:grid;gap:16px}
.verify-list li{display:grid;grid-template-columns:38px 1fr;gap:12px;align-items:flex-start}
.verify-list .v-icon{width:38px;height:38px;border-radius:12px;background:#E8F2FA;color:var(--brand);display:flex;align-items:center;justify-content:center}
.verify-list .v-icon svg{width:18px;height:18px}
.verify-list strong{display:block;font-size:15px;font-weight:700;color:var(--text);line-height:1.4}
.verify-list p{font-size:14px;color:var(--text-sub);margin:2px 0 0}
@media(max-width:1024px){.verify-card{grid-template-columns:1fr}.verify-left{border-right:0;border-bottom:1px solid var(--line);padding:36px}.verify-right{padding:36px}}
@media(max-width:767px){.verify-left,.verify-right{padding:30px 24px}}

/* faq */
.faq-section{padding:var(--space-section) 0}
.faq-panel{max-width:880px;margin:0 auto;background:#fff;border-radius:22px;box-shadow:var(--shadow-card);overflow:hidden}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-item details{padding:0}
.faq-item summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:24px 28px;cursor:pointer;font-weight:600;font-size:16px;color:var(--text);transition:background .2s ease,color .2s ease}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:#F7FAFD;color:var(--brand-deep)}
.faq-plus{width:34px;height:34px;border-radius:50%;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .3s ease;background:#F8FBFE}
.faq-plus svg{width:15px;height:15px;stroke:var(--brand-deep);transition:transform .3s ease}
details[open] summary{color:var(--brand-deep);background:#F9FBFD}
details[open] .faq-plus{background:var(--brand);border-color:var(--brand)}
details[open] .faq-plus svg{transform:rotate(45deg);stroke:#fff}
.faq-answer{padding:0 28px 24px 58px;color:var(--text-sub);font-size:15px;line-height:1.85;margin-top:-4px}
@media(max-width:767px){
  .faq-item summary{padding:18px 16px;font-size:15px}
  .faq-answer{padding:0 16px 18px 50px}
}

/* category cta */
.category-cta{position:relative;padding:68px 0 86px;background:linear-gradient(132deg,#1D517C 0%,#2B6E9E 100%)}
.category-cta::before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M60 0H0V60' stroke='%23FFFFFF' stroke-opacity='.06'/%3E%3C/svg%3E") repeat}
.cta-inner{position:relative;z-index:1;text-align:center;max-width:800px;margin:0 auto}
.cta-inner h2{font-size:34px;color:#fff;font-weight:800;margin:0 0 12px;letter-spacing:-.01em}
.category-cta .cta-sub{font-size:16px;color:rgba(255,255,255,.82);margin:0 0 28px}
.cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn-white{background:#fff;color:var(--brand-deep);padding:15px 30px;box-shadow:0 10px 24px -10px rgba(0,0,0,.2)}
.btn-white:hover{background:#F1F7FC;color:var(--brand-deep);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1.5px solid rgba(255,255,255,.22);padding:15px 30px}
.btn-ghost:hover{background:rgba(255,255,255,.24);color:#fff;transform:translateY(-2px)}
@media(max-width:767px){
  .category-cta{padding:50px 0 70px}
  .cta-inner h2{font-size:27px}
  .cta-btns .btn{width:100%}
}

/* footer */
.site-footer{background:#EAF1F7;border-top:1px solid #DCE7F1;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:44px;padding-bottom:48px}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{font-size:14px;line-height:1.75;color:var(--text-sub);max-width:400px;margin:12px 0 0}
.footer-column h4{font-size:15px;font-weight:700;color:var(--brand-deep);margin:0 0 18px}
.footer-column ul{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.footer-column a{display:inline-flex;font-size:14px;color:var(--text-sub);transition:padding-left .2s ease,color .2s ease}
.footer-column a:hover{color:var(--action);padding-left:4px}
.footer-bottom{border-top:1px solid #D4E2EE;padding:24px 0}
.footer-bottom-inner{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap}
.footer-bottom span{font-size:13px;color:#778da3}
@media(max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr;gap:34px}}
@media(max-width:767px){.footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}.footer-bottom-inner{flex-direction:column;text-align:center}}
@media(max-width:520px){.container{padding:0 18px}.header-actions .header-cta{width:36px;height:36px;padding:0;justify-content:center}.header-cta span{display:none}.footer-column ul{grid-gap:10px}}

/* roulang page: article */
:root {
  --primary: #2B6E9E;
  --primary-deep: #1D517C;
  --primary-soft: #EAF2F9;
  --accent-blue: #6FA9D3;
  --action: #E8752C;
  --action-deep: #D4621A;
  --success: #17A673;
  --bg-page: #F3F7FB;
  --bg-card: #FFFFFF;
  --text-main: #1A2B3C;
  --text-muted: #576B7E;
  --line: #E2EBF3;
  --radius-card: 16px;
  --radius-card-sm: 12px;
  --radius-btn: 10px;
  --shadow-card: 0 1px 2px rgba(28, 55, 92, .04), 0 12px 26px -12px rgba(28, 55, 92, .08);
  --shadow-hover: 0 8px 16px -8px rgba(28, 55, 92, .08), 0 24px 40px -16px rgba(28, 55, 92, .16);
  --header-h: 72px;
  --font-main: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

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

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

button, input {
  font-family: inherit;
  font-size: inherit;
  border: 0;
  outline: none;
  background: transparent;
}

ul, ol {
  list-style: none;
}

.container {
  width: min(1240px, 100% - 48px);
  margin-inline: auto;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 3px solid rgba(43, 110, 158, .28);
  outline-offset: 2px;
  border-radius: 8px;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 235, 243, .85);
  z-index: 100;
  transition: box-shadow .3s ease, background .3s ease;
}

.site-header.scrolled {
  background: #fff;
  box-shadow: 0 6px 24px -16px rgba(28, 55, 92, .16), 0 1px 0 rgba(226, 235, 243, .6);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #2B6E9E, #1D517C);
  color: #fff;
  border-radius: 12px;
  box-shadow: 0 8px 18px -10px rgba(29, 81, 124, .6);
}

.brand-mark svg {
  width: 24px;
  height: 24px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  gap: 3px;
}

.brand-text strong {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .5px;
  color: var(--primary-deep);
}

.brand-text small {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .2px;
  color: var(--text-muted);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  background: #F7FAFD;
  border-radius: 999px;
}

.nav-link {
  position: relative;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  transition: background .25s, color .25s, box-shadow .25s;
}

.nav-link:hover {
  color: var(--primary);
  background: #EFF6FB;
}

.nav-link.active {
  color: var(--primary-deep);
  background: #fff;
  font-weight: 600;
  box-shadow: 0 8px 18px -14px rgba(28, 55, 92, .4);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 3px;
  width: 18px;
  height: 3px;
  border-radius: 99px;
  background: var(--action);
  transform: translateX(-50%);
}

.mobile-nav-title {
  display: none;
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-shrink: 0;
}

.search {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 200px;
  height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #F7FAFD;
  transition: border .25s, box-shadow .25s, background .25s;
}

.search:focus-within {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(43, 110, 158, .1);
}

.search-icon {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.search input {
  width: 100%;
  color: var(--text-main);
  font-size: 14px;
}

.search input::placeholder {
  color: #93A6B8;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  background: var(--action);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: 0 10px 22px -12px rgba(232, 117, 44, .66);
  transition: background .25s, transform .2s, box-shadow .25s;
}

.header-cta svg {
  width: 18px;
  height: 18px;
}

.header-cta:hover {
  background: var(--action-deep);
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -14px rgba(212, 98, 26, .72);
}

.header-cta:active {
  transform: translateY(0);
  box-shadow: none;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: #F2F7FB;
  border: 1px solid var(--line);
  position: relative;
  cursor: pointer;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 4px;
  background: var(--primary-deep);
  position: absolute;
  left: 50%;
  margin-left: -9px;
  transition: transform .3s, opacity .3s;
}

.nav-toggle span {
  top: 50%;
  margin-top: -1px;
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

.site-header.open .nav-toggle span {
  background: transparent;
}

.site-header.open .nav-toggle span::before {
  transform: translateY(6px) rotate(45deg);
}

.site-header.open .nav-toggle span::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* ===== Article banner ===== */
.article-hero {
  padding-top: calc(var(--header-h) + 34px);
  padding-bottom: 34px;
  background-image:
    linear-gradient(180deg, rgba(255,255,255,.96), rgba(243,247,251,.9)),
    url(/assets/images/backpic/back-2.png);
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid rgba(226, 235, 243, .75);
}

.article-hero-inner {
  width: min(820px, 100% - 48px);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--text-muted);
}

.breadcrumb a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
  transition: color .2s;
}

.breadcrumb a:hover {
  color: var(--primary);
}

.breadcrumb .sep {
  opacity: .5;
}

.breadcrumb .current {
  color: var(--text-main);
  font-weight: 500;
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== Article body ===== */
.article-main {
  padding: 42px 0 80px;
}

.article-shell-wrap {
  width: min(820px, 100% - 48px);
  margin-inline: auto;
}

.article-shell {
  background: var(--bg-card);
  border-radius: 20px;
  border: 1px solid rgba(226, 235, 243, .65);
  box-shadow: var(--shadow-card);
  padding: 56px;
}

.article-head {
  border-bottom: 1px solid var(--line);
  padding-bottom: 30px;
  margin-bottom: 40px;
}

.article-head h1 {
  font-size: 40px;
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: -.5px;
  color: var(--text-main);
}

.article-summary {
  margin-top: 18px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-muted);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  margin-top: 22px;
  font-size: 13px;
  color: var(--text-muted);
}

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  line-height: 1.2;
}

.article-meta-item svg {
  width: 15px;
  height: 15px;
  color: var(--accent-blue);
}

.meta-cat {
  display: inline-flex;
  align-items: center;
  height: 26px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary-deep);
  font-size: 13px;
  font-weight: 600;
  transition: background .2s, color .2s;
}

.meta-cat:hover {
  background: var(--primary);
  color: #fff;
}

/* rich content area */
.article-body {
  color: var(--text-main);
  font-size: 16.5px;
  line-height: 1.9;
}

.article-body > * + * {
  margin-top: 1.2em;
}

.article-body p {
  color: #213545;
}

.article-body h2,
.article-body h3,
.article-body h4 {
  line-height: 1.5;
  color: var(--primary-deep);
  margin-top: 1.7em;
}

.article-body h2 {
  font-size: 26px;
  padding-left: 14px;
  border-left: 4px solid var(--action);
  border-radius: 2px;
}

.article-body h3 {
  font-size: 21px;
}

.article-body a {
  color: var(--primary);
  border-bottom: 1px solid rgba(43, 110, 158, .3);
  transition: border .2s, color .2s;
}

.article-body a:hover {
  color: var(--action);
  border-color: rgba(232, 117, 44, .4);
}

.article-body ul,
.article-body ol {
  padding-left: 6px;
  display: grid;
  gap: 10px;
}

.article-body ul li {
  position: relative;
  padding-left: 26px;
  color: #2D4153;
}

.article-body ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--primary);
  opacity: .7;
}

.article-body ol {
  counter-reset: item;
}

.article-body ol li {
  position: relative;
  padding-left: 40px;
  counter-increment: item;
  color: #2D4153;
}

.article-body ol li::before {
  content: counter(item);
  position: absolute;
  left: 0;
  top: .15em;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary-deep);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.article-body blockquote {
  margin: 1.6em 0;
  padding: 20px 24px;
  border-radius: 14px;
  background: #FBF6F0;
  border-left: 4px solid var(--action);
  color: #5A4B3E;
  font-size: 15px;
}

.article-body img {
  border-radius: 16px;
  border: 1px solid var(--line);
  margin: 1.8em 0;
  box-shadow: var(--shadow-card);
}

.article-body code {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  background: #EDF5FB;
  color: var(--primary-deep);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .92em;
}

.article-body table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  margin: 1.5em 0;
}

.article-body th {
  background: var(--primary-soft);
  color: var(--primary-deep);
  font-weight: 600;
  text-align: left;
  padding: 13px 16px;
  font-size: 14px;
}

.article-body td {
  padding: 13px 16px;
  border-top: 1px solid var(--line);
  font-size: 15px;
  color: #2D4153;
}

.article-body hr {
  border: 0;
  height: 1px;
  background: var(--line);
  margin: 2.2em 0;
}

/* download inline block */
.article-download-block {
  margin: 40px 0 8px;
  padding: 28px;
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(43,110,158,.96), rgba(29,81,124,.98)),
    url(/assets/images/backpic/back-2.png);
  background-size: cover;
  background-position: center;
  color: #fff;
  box-shadow: 0 18px 38px -20px rgba(29, 81, 124, .6);
}

.article-download-block h3 {
  color: #fff;
  font-size: 21px;
  font-weight: 700;
}

.article-download-block p {
  color: rgba(255,255,255,.84);
  font-size: 14.5px;
  margin-top: 8px;
  max-width: 580px;
}

.download-block-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  background: var(--action);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  box-shadow: 0 12px 24px -12px rgba(232, 117, 44, .7);
  transition: background .25s, transform .2s, box-shadow .25s;
}

.download-btn svg {
  width: 17px;
  height: 17px;
}

.download-btn:hover {
  background: #FF8A3D;
  transform: translateY(-2px);
}

.download-btn.outline-white {
  background: transparent;
  border: 1px solid rgba(255,255,255,.45);
  color: #fff;
  box-shadow: none;
}

.download-btn.outline-white:hover {
  background: rgba(255,255,255,.14);
  transform: translateY(-2px);
}

.article-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px dashed var(--line);
}

.toolbar-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.mini-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 38px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #F9FCFE;
  color: var(--text-muted);
  font-size: 13.5px;
  font-weight: 500;
  transition: all .25s;
}

.mini-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  background: #F4F8FC;
  border: 1px solid var(--line);
  color: var(--text-muted);
  font-size: 12.5px;
  transition: all .2s;
}

.tag-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* ===== Related ===== */
.related-section {
  width: min(1240px, 100% - 48px);
  margin: 0 auto;
  padding: 26px 0 60px;
}

.related-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 26px;
}

.related-head h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  position: relative;
  padding-bottom: 10px;
}

.related-head h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 46px;
  height: 4px;
  border-radius: 99px;
  background: var(--action);
}

.related-head a {
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
  white-space: nowrap;
  transition: color .2s;
}

.related-head a:hover {
  color: var(--action);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-card {
  background: #fff;
  border: 1px solid rgba(226,235,243,.8);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform .3s ease, box-shadow .3s ease;
}

.related-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.related-card-img {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--primary-soft);
}

.related-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

.related-card:hover .related-card-img img {
  transform: scale(1.05);
}

.related-card-cat {
  position: absolute;
  left: 12px;
  top: 12px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 99px;
  background: rgba(255,255,255,.92);
  color: var(--primary-deep);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,.5);
}

.related-card-body {
  padding: 18px 20px 20px;
}

.related-card-body h3 {
  font-size: 17px;
  line-height: 1.55;
  color: var(--text-main);
  font-weight: 600;
  transition: color .2s;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card:hover .related-card-body h3 {
  color: var(--primary);
}

.related-card-body p {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid #EEF4F9;
  font-size: 12.5px;
  color: #8AA0B4;
}

.related-meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: #C1D4E4;
}

/* ===== Empty ===== */
.article-empty {
  width: min(720px, 100% - 48px);
  margin-inline: auto;
  padding: 48px 0 30px;
}

.empty-card {
  background: #fff;
  border-radius: 22px;
  border: 1px solid rgba(226,235,243,.9);
  box-shadow: var(--shadow-card);
  padding: 60px 48px;
  text-align: center;
}

.empty-icon {
  width: 96px;
  height: 96px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 30px;
  background: var(--primary-soft);
  color: var(--primary);
}

.empty-icon svg {
  width: 42px;
  height: 42px;
}

.empty-card h1 {
  font-size: 28px;
  color: var(--text-main);
  font-weight: 700;
}

.empty-card p {
  margin: 14px auto 26px;
  max-width: 460px;
  color: var(--text-muted);
  font-size: 15px;
}

.empty-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: transform .25s, box-shadow .25s, background .25s, border-color .25s;
}

.btn svg {
  width: 17px;
  height: 17px;
}

.btn-primary {
  background: var(--action);
  color: #fff;
  box-shadow: 0 12px 26px -14px rgba(232,117,44,.7);
}

.btn-primary:hover {
  background: var(--action-deep);
  transform: translateY(-2px);
  box-shadow: 0 16px 32px -16px rgba(212,98,26,.7);
}

.btn-ghost {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--primary-deep);
}

.btn-ghost:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
  transform: translateY(-2px);
}

/* ===== Footer ===== */
.site-footer {
  background: #EAF1F7;
  border-top: 1px solid rgba(226,235,243,.8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr .8fr .9fr .9fr;
  gap: 48px;
  padding: 68px 0 46px;
}

.site-footer .brand .brand-text strong {
  color: var(--primary-deep);
}

.footer-brand p {
  max-width: 380px;
  margin-top: 18px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-muted);
}

.footer-column h4 {
  font-size: 15px;
  color: var(--text-main);
  font-weight: 600;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.footer-column h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 26px;
  height: 3px;
  border-radius: 99px;
  background: var(--action);
}

.footer-column ul {
  display: grid;
  gap: 5px;
}

.footer-column ul a {
  display: inline-block;
  padding: 5px 0;
  font-size: 14px;
  color: var(--text-muted);
  transition: color .2s, padding-left .25s;
}

.footer-column ul a:hover {
  color: var(--primary);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(226,235,243,.7);
  padding: 22px 0;
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: #8BA0B3;
  line-height: 1.6;
}

/* mobile bar */
.mobile-download-bar {
  display: none;
}

/* responsive */
@media (max-width: 1080px) {
  .search {
    width: 180px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 920px) {
  .search {
    display: none;
  }
}

@media (max-width: 860px) {
  .header-inner {
    gap: 8px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .brand-text strong {
    font-size: 16.5px;
  }

  .brand-text small {
    font: 11.5px;
  }

  .main-nav {
    position: fixed;
    top: calc(var(--header-h) + 10px);
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 40px);
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow-hover);
    border-radius: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 16px;
    opacity: 0;
    visibility: hidden;
    margin-top: -8px;
    transition: opacity .25s ease, margin-top .25s ease, visibility .25s;
    z-index: 99;
  }

  .site-header.open .main-nav {
    opacity: 1;
    visibility: visible;
    margin-top: 0;
  }

  .main-nav a {
    display: block;
    padding: 12px 18px;
    border-radius: 10px;
    font-size: 15px;
  }

  .main-nav a.active::after {
    left: 18px;
    bottom: auto;
    width: 4px;
    height: 20px;
    transform: none;
  }

  .mobile-nav-title {
    display: block;
    font-size: 12px;
    letter-spacing: .15em;
    color: #95A9BA;
    padding: 6px 12px 10px;
    border-bottom: 1px solid #F0F6FA;
    margin-bottom: 8px;
    font-weight: 500;
    text-transform: uppercase;
  }

  .header-cta span {
    display: none;
  }

  .header-cta {
    width: 44px;
    padding: 0;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .article-shell {
    padding: 40px 28px;
  }

  .article-head h1 {
    font-size: 32px;
  }

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

@media (max-width: 640px) {
  body {
    padding-bottom: 72px;
  }

  .container,
  .article-hero-inner,
  .article-shell-wrap {
    width: min(100% - 32px, 1240px);
  }

  .brand-text strong {
    font-size: 15px;
    letter-spacing: -.2px;
  }

  .brand-text small {
    font-size: 10.5px;
    letter-spacing: 0;
  }

  .brand {
    gap: 8px;
  }

  .header-cta {
    width: 42px;
    height: 42px;
  }

  .header-cta svg {
    width: 18px;
  }

  .nav-toggle {
    width: 42px;
    height: 42px;
  }

  .main-nav {
    top: 66px;
    width: calc(100% - 24px);
  }

  .article-hero {
    padding-top: calc(var(--header-h) + 30px);
    padding-bottom: 20px;
  }

  .breadcrumb {
    font-size: 12px;
  }

  .article-main {
    padding: 24px 0 30px;
  }

  .article-shell {
    padding: 30px 20px 34px;
    border-radius: 16px;
  }

  .article-head h1 {
    font-size: 26px;
    letter-spacing: -.3px;
  }

  .article-summary {
    font-size: 14.5px;
  }

  .article-head {
    margin-bottom: 28px;
    padding-bottom: 22px;
  }

  .article-body {
    font-size: 15.5px;
  }

  .article-body h2 {
    font-size: 21px;
  }

  .article-body h3 {
    font-size: 18.5px;
  }

  .article-body ol,
  .article-body ul {
    padding-left: 0;
  }

  .article-body table {
    display: block;
    overflow-x: auto;
  }

  .article-body blockquote {
    padding: 16px;
    font-size: 14px;
  }

  .article-body img {
    border-radius: 12px;
  }

  .article-download-block {
    padding: 24px 18px;
  }

  .download-block-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .download-btn {
    width: 100%;
  }

  .article-toolbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .toolbar-links {
    flex-wrap: wrap;
  }

  .related-section {
    width: min(100% - 32px, 1240px);
    padding-top: 14px;
  }

  .related-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .related-head h2 {
    font-size: 23px;
  }

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

  .empty-card {
    padding: 36px 22px;
  }

  .empty-card h1 {
    font-size: 24px;
  }

  .empty-actions .btn {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 48px 0 34px;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    font-size: 12px;
  }

  .mobile-download-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 92;
    min-height: 64px;
    padding: 10px 16px;
    background: rgba(255,255,255,.96);
    border-top: 1px solid var(--line);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: 0 -8px 24px -20px rgba(28,55,92,.2);
  }

  .mobile-download-info {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
  }

  .mobile-download-ico {
    width: 38px;
    height: 38px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--primary-deep));
    color: #fff;
  }

  .mobile-download-ico svg {
    width: 19px;
    height: 19px;
  }

  .mobile-download-info strong {
    display: block;
    font-size: 14px;
    color: var(--text-main);
    line-height: 1.2;
  }

  .mobile-download-info small {
    display: block;
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 2px;
  }

  .mobile-download-bar .btn {
    height: 40px;
    padding: 0 18px;
    font-size: 14px;
    flex-shrink: 0;
  }
}

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

/* roulang page: category2 */
:root {
    --brand: #2B6E9E;
    --brand-deep: #1D517C;
    --brand-soft: #6FA9D3;
    --accent: #E8752C;
    --accent-hover: #D4621A;
    --success: #17A673;
    --page-bg: #F3F7FB;
    --card: #FFFFFF;
    --text: #1A2B3C;
    --text-secondary: #576B7E;
    --line: #E2EBF3;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 10px;
    --shadow-static: 0 1px 2px rgba(28,55,92,.04), 0 12px 26px -12px rgba(28,55,92,.08);
    --shadow-hover: 0 8px 16px -8px rgba(28,55,92,.08), 0 24px 40px -16px rgba(28,55,92,.16);
    --max-width: 1240px;
    --space-section: 96px;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.75;
    color: var(--text);
    background: var(--page-bg);
    -webkit-font-smoothing: antialiased;
  }

  body.lock-scroll {
    overflow: hidden;
  }

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

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

  ul,
  ol {
    list-style: none;
  }

  button,
  input {
    font: inherit;
    border: none;
    outline: none;
    background: transparent;
  }

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

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 68px;
    background: #FFFFFF;
    border-bottom: 1px solid var(--line);
    transition: box-shadow .3s ease, background .3s ease;
  }

  .site-header.scrolled {
    box-shadow: 0 6px 24px rgba(28, 55, 92, 0.08);
  }

  .site-header .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    height: 68px;
  }

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    color: #FFFFFF;
    background: var(--brand);
    box-shadow: 0 4px 12px rgba(43, 110, 158, .18);
  }

  .brand-mark svg {
    width: 21px;
    height: 21px;
  }

  .brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
  }

  .brand-text strong {
    font-size: 17px;
    font-weight: 700;
    color: var(--brand-deep);
    letter-spacing: .01em;
  }

  .brand-text small {
    font-size: 11px;
    color: var(--text-secondary);
    letter-spacing: .08em;
    margin-top: 1px;
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 8px 12px;
    border-radius: 8px;
    transition: background .2s, color .2s;
    white-space: nowrap;
  }

  .nav-link:hover {
    color: var(--brand);
    background: rgba(43, 110, 158, .06);
  }

  .nav-link.active {
    color: var(--brand-deep);
    font-weight: 600;
    background: rgba(43, 110, 158, .08);
  }

  .header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .search {
    display: flex;
    align-items: center;
    background: var(--page-bg);
    border: 1px solid transparent;
    border-radius: 100px;
    padding: 0 12px;
    width: 190px;
    transition: border .2s, background .2s, box-shadow .2s;
  }

  .search:focus-within {
    background: #fff;
    border-color: var(--brand-soft);
    box-shadow: 0 0 0 3px rgba(43, 110, 158, .1);
  }

  .search-icon {
    width: 15px;
    height: 15px;
    color: var(--text-secondary);
    flex-shrink: 0;
  }

  .search input {
    padding: 7px 8px;
    font-size: 13px;
    background: transparent;
    color: var(--text);
    width: 100%;
  }

  .search input::placeholder {
    color: #8FA1B3;
  }

  .header-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--accent);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    padding: 9px 18px;
    border-radius: 10px;
    transition: background .2s, transform .2s, box-shadow .2s;
    white-space: nowrap;
  }

  .header-cta svg {
    width: 16px;
    height: 16px;
  }

  .header-cta:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 8px 16px -6px rgba(232, 117, 44, .35);
  }

  .nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    background: var(--page-bg);
    cursor: pointer;
  }

  .nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform .3s, opacity .3s;
  }

  .nav-toggle.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle.is-open span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Page Hero */
  .page-section {
    padding: 96px 0;
  }

  .category-hero {
    position: relative;
    background: linear-gradient(135deg, #EEF4FA 0%, #F7FBFE 55%, #F3F7FB 100%);
    padding: 142px 0 68px;
    overflow: hidden;
  }

  .category-hero::before {
    content: "";
    position: absolute;
    top: 30px;
    right: -80px;
    width: 340px;
    height: 340px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(43, 110, 158, .10) 0%, transparent 70%);
    pointer-events: none;
  }

  .category-hero::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 60%;
    width: 260px;
    height: 200px;
    background: url('/assets/images/backpic/back-3.webp') no-repeat right bottom / contain;
    opacity: .12;
    pointer-events: none;
  }

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

  .category-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 24px;
  }

  .category-breadcrumb a {
    transition: color .2s;
  }

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

  .category-breadcrumb .sep {
    color: #B9C8D6;
  }

  .category-breadcrumb .current {
    color: var(--brand);
    font-weight: 500;
  }

  .category-hero-grid {
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: 48px;
    align-items: center;
  }

  .category-hero-copy h1 {
    font-size: 44px;
    line-height: 1.25;
    font-weight: 700;
    color: var(--brand-deep);
    margin-bottom: 14px;
    letter-spacing: -.01em;
  }

  .category-hero-copy h1 span {
    color: var(--accent);
  }

  .category-hero-copy .hero-lead {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 520px;
  }

  .hero-note {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
  }

  .hero-note .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    padding: 6px 12px;
    border-radius: 30px;
    background: #fff;
    border: 1px solid var(--line);
    color: var(--text-secondary);
  }

  .hero-note .badge svg {
    width: 14px;
    height: 14px;
    color: var(--success);
  }

  .hero-img-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-hover);
  }

  .hero-img-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
  }

  .hero-img-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(29, 81, 124, .05), rgba(43, 110, 158, .28));
  }

  .hero-img-card .img-tag {
    position: absolute;
    left: 16px;
    bottom: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, .86);
    backdrop-filter: blur(6px);
    padding: 8px 14px;
    border-radius: 30px;
    font-size: 13px;
    color: var(--brand-deep);
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0, 0, 0, .08);
  }

  .hero-img-card .img-tag svg {
    width: 15px;
    height: 15px;
    color: var(--success);
  }

  /* Meta Strip */
  .strip-section {
    padding: 0;
    background: transparent;
    margin-top: -20px;
    position: relative;
    z-index: 5;
  }

  .meta-strip {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    background: var(--card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-static);
    overflow: hidden;
    border: 1px solid var(--line);
  }

  .meta-item {
    padding: 22px 28px;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    border-left: 1px solid var(--line);
  }

  .meta-item:first-child {
    border-left: none;
  }

  .meta-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(43, 110, 158, .08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand);
  }

  .meta-icon svg {
    width: 20px;
    height: 20px;
  }

  .meta-text strong {
    display: block;
    font-size: 17px;
    font-weight: 600;
    color: var(--text);
    line-height: 1.4;
  }

  .meta-text p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 2px;
  }

  /* Section title */
  .section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 42px;
  }

  .section-kicker {
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: .1em;
    text-transform: uppercase;
    margin-bottom: 6px;
  }

  .section-head h2 {
    font-size: 32px;
    line-height: 1.3;
    font-weight: 700;
    color: var(--brand-deep);
  }

  .section-head p {
    color: var(--text-secondary);
    font-size: 15px;
    margin-top: 8px;
    max-width: 680px;
  }

  /* Topic List */
  .topic-section {
    background: var(--page-bg);
  }

  .topic-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 40px;
    align-items: start;
  }

  .topic-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .topic-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 28px 30px;
    display: flex;
    gap: 20px;
    transition: box-shadow .3s, transform .3s, border-color .3s;
  }

  .topic-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
    border-color: rgba(43, 110, 158, .15);
  }

  .topic-num {
    font-size: 36px;
    font-weight: 700;
    line-height: 1;
    color: rgba(43, 110, 158, .2);
    flex-shrink: 0;
    font-family: "Inter", "PingFang SC", sans-serif;
    width: 42px;
  }

  .topic-card-body {
    flex: 1;
  }

  .topic-card-body h3 {
    font-size: 19px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
  }

  .topic-card-body h3 a {
    color: inherit;
    transition: color .2s;
  }

  .topic-card-body h3 a:hover {
    color: var(--brand);
  }

  .topic-card-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 12px;
  }

  .topic-meta {
    display: flex;
    gap: 14px;
    align-items: center;
    flex-wrap: wrap;
  }

  .topic-tag {
    font-size: 12px;
    background: rgba(43, 110, 158, .07);
    color: var(--brand);
    padding: 3px 10px;
    border-radius: 30px;
    font-weight: 500;
  }

  .topic-tag.hot {
    background: rgba(232, 117, 44, .1);
    color: var(--accent);
  }

  .topic-time {
    font-size: 13px;
    color: #92A4B5;
  }

  /* Sidebar */
  .sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 84px;
  }

  .side-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-static);
    border: 1px solid var(--line);
  }

  .side-card h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 14px;
    color: var(--text);
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
    position: relative;
  }

  .side-card h3::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--brand);
    border-radius: 2px;
  }

  .download-mini-card {
    text-align: center;
  }

  .download-mini-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(23, 166, 115, .1);
    color: var(--success);
    font-size: 13px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 30px;
    margin-bottom: 12px;
  }

  .download-mini-card p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 18px;
    line-height: 1.7;
  }

  .mini-qr-block {
    background: var(--page-bg);
    border: 1px dashed var(--line);
    border-radius: 12px;
    padding: 14px 10px;
    margin-bottom: 18px;
    font-size: 13px;
    color: var(--text-secondary);
  }

  .mini-qr-placeholder {
    width: 64px;
    height: 64px;
    margin: 0 auto 8px;
    border-radius: 8px;
    background: repeating-linear-gradient(45deg, #DBE7F0, #DBE7F0 4px, #edf3f7 4px, #edf3f7 8px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(43,110,158,.5);
  }

  .mini-qr-block span {
    font-size: 12px;
  }

  .download-mini-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--accent);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    padding: 11px 20px;
    border-radius: 10px;
    width: 100%;
    transition: .2s;
  }

  .download-mini-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -6px rgba(232, 117, 44, .4);
  }

  .side-list a {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    padding: 9px 0;
    font-size: 14px;
    color: var(--text-secondary);
    transition: .2s;
    border-bottom: 1px dashed #F0F5FA;
  }

  .side-list a:last-child {
    border-bottom: none;
  }

  .side-list a:hover {
    color: var(--brand);
    padding-left: 4px;
  }

  .side-list a span {
    color: var(--brand-soft);
    flex-shrink: 0;
  }

  /* Steps */
  .steps-section {
    background: var(--card);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .step-card {
    background: var(--page-bg);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 28px 24px;
    position: relative;
    transition: .3s;
  }

  .step-card:hover {
    background: #fff;
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
  }

  .step-index {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--brand-deep);
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
  }

  .step-card:nth-child(2) .step-index {
    background: var(--brand);
  }

  .step-card:nth-child(3) .step-index {
    background: var(--brand-soft);
  }

  .step-card:nth-child(4) .step-index {
    background: #3C87B5;
  }

  .step-card h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
  }

  .step-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
  }

  /* FAQ */
  .faq-section {
    background: var(--page-bg);
  }

  .faq-container {
    max-width: 920px;
    margin: 0 auto;
  }

  .faq-list {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-static);
    border: 1px solid var(--line);
    padding: 8px 28px;
  }

  .faq-item {
    border-bottom: 1px solid var(--line);
    padding: 24px 0;
  }

  .faq-item:last-child {
    border-bottom: none;
  }

  .faq-q {
    display: flex;
    align-items: center;
    gap: 16px;
    cursor: pointer;
  }

  .faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(43, 110, 158, .1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand);
    flex-shrink: 0;
    font-size: 18px;
    transition: background .3s, color .3s;
  }

  .faq-q h3 {
    font-size: 17px;
    font-weight: 600;
    flex: 1;
    color: var(--text);
    line-height: 1.5;
    transition: color .2s;
  }

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

  .faq-detail p {
    padding: 14px 0 4px 44px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
  }

  .mobile-download-bar {
    display: none;
  }

  /* CTA */
  .cta-section {
    background: var(--brand-deep);
    position: relative;
    overflow: hidden;
  }

  .cta-section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('/assets/images/backpic/back-2.png') no-repeat center center / cover;
    opacity: .1;
  }

  .cta-content {
    position: relative;
    z-index: 2;
    padding: 56px 0;
    max-width: 920px;
    margin: 0 auto;
    text-align: center;
  }

  .cta-content .cta-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: rgba(255, 255, 255, .8);
    background: rgba(255, 255, 255, .1);
    font-size: 13px;
    border-radius: 30px;
    padding: 6px 14px;
    margin-bottom: 16px;
  }

  .cta-content h2 {
    color: #fff;
    font-size: 34px;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 12px;
  }

  .cta-content p {
    color: rgba(255, 255, 255, .8);
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 26px;
  }

  .cta-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
  }

  .cta-btn, .cta-btn-o {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 600;
    padding: 14px 32px;
    border-radius: 12px;
    transition: .2s;
  }

  .cta-btn {
    background: var(--accent);
    color: #fff;
  }

  .cta-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 12px 24px -8px rgba(0,0,0,.3);
  }

  .cta-btn-o {
    border: 1px solid rgba(255, 255, 255, .5);
    color: #fff;
  }

  .cta-btn-o:hover {
    background: rgba(255, 255, 255, .1);
    transform: translateY(-2px);
  }

  .cta-secure {
    margin-top: 18px;
    font-size: 13px;
    color: rgba(255, 255, 255, .7);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
  }

  .cta-secure svg {
    width: 15px;
    height: 15px;
    color: #6EE7BD;
  }

  /* Notices / Panel */
  .notice-strip {
    background: #fff;
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
  }

  .notice-inner {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--text-secondary);
  }

  .notice-inner strong {
    color: var(--text);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .notice-inner strong svg {
    color: var(--accent);
    width: 17px;
    height: 17px;
  }

  /* Footer */
  .site-footer {
    background: #EAF1F7;
    padding: 70px 0 0;
  }

  .site-footer .footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
  }

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

  .site-footer .brand small,
  .site-footer .brand strong {
    color: var(--brand-deep);
  }

  .footer-brand p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-top: 18px;
    max-width: 360px;
  }

  .footer-column h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--brand-deep);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(29, 81, 124, .1);
  }

  .footer-column ul li {
    margin-bottom: 10px;
  }

  .footer-column ul a {
    color: var(--text-secondary);
    font-size: 14px;
    transition: color .2s, padding-left .2s;
  }

  .footer-column ul a:hover {
    color: var(--brand);
    padding-left: 4px;
  }

  .footer-bottom {
    border-top: 1px solid rgba(29, 81, 124, .1);
    padding: 24px 0;
  }

  .footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    color: #7891A5;
    font-size: 13px;
    line-height: 1.6;
  }

  @media (max-width: 1100px) {
    .footer-grid {
      grid-template-columns: 1fr 1fr !important;
    }
  }

  @media (max-width: 1024px) {
    .main-nav {
      gap: 4px;
    }

    .nav-link {
      padding: 8px 8px;
    }

    .search {
      width: 160px;
    }

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

    .topic-layout {
      grid-template-columns: 1fr;
    }

    .sidebar {
      position: static;
      flex-direction: row;
      flex-wrap: wrap;
    }

    .side-card {
      flex: 1;
      min-width: 260px;
    }

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

  @media (max-width: 768px) {
    :root {
      --space-section: 56px;
    }

    .site-header.scrolled .search {
      display: none;
    }

    .header-actions {
      gap: 6px;
    }

    .header-cta {
      display: none;
    }

    .main-nav {
      position: fixed;
      top: 68px;
      left: 0;
      right: 0;
      background: #fff;
      border-bottom: 1px solid var(--line);
      flex-direction: column;
      padding: 16px 24px 20px;
      gap: 2px;
      align-items: flex-start;
      box-shadow: 0 16px 30px rgba(0, 0, 0, .08);
      text-align: center;
      max-height: 0;
      overflow: hidden;
      transition: max-height .4s ease;
    }

    .main-nav.open {
      max-height: 320px;
    }

    .main-nav .nav-link {
      display: block;
      width: 100%;
      padding: 12px 8px;
    }

    .nav-toggle {
      display: inline-flex;
    }

    .category-hero {
      padding: 118px 0 56px;
    }

    .category-hero-copy h1 {
      font-size: 32px;
    }

    .hero-img-card img {
      height: 220px;
    }

    .meta-strip {
      grid-template-columns: 1fr;
      margin-top: -8px;
    }

    .meta-item {
      border-left: none;
      border-bottom: 1px solid var(--line);
      padding: 16px 20px;
    }

    .meta-item:last-child {
      border-bottom: none;
    }

    .section-head {
      flex-direction: column;
      align-items: flex-start;
    }

    .section-head h2 {
      font-size: 26px;
    }

    .topic-card {
      flex-direction: column;
      gap: 10px;
      padding: 24px;
    }

    .topic-num {
      font-size: 28px;
    }

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

    .footer-grid {
      grid-template-columns: 1fr !important;
      gap: 32px;
    }

    .footer-bottom-inner {
      flex-direction: column;
    }

    .cta-content h2 {
      font-size: 26px;
    }

    .cta-buttons {
      flex-direction: column;
      width: 100%;
    }

    .cta-btn,
    .cta-btn-o {
      padding: 13px 24px;
      width: 100%;
      justify-content: center;
    }

    .faq-list {
      padding: 8px 16px;
    }

    .faq-q {
      gap: 12px;
    }

    .faq-detail p {
      padding-left: 40px;
    }

    .mobile-download-bar {
      display: flex;
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      z-index: 999;
      background: #fff;
      padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
      box-shadow: 0 -4px 24px rgba(28, 55, 92, .12);
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      transform: translateY(100%);
      transition: transform .3s ease;
    }

    .mobile-download-bar.show {
      transform: translateY(0);
    }

    .mb-left {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .mb-icon {
      width: 30px;
      height: 30px;
      border-radius: 8px;
      background: var(--brand);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .mb-icon svg {
      width: 16px;
      height: 16px;
    }

    .mb-text {
      font-size: 13px;
      font-weight: 600;
      color: var(--text);
    }

    .mb-text small {
      display: block;
      font-size: 11px;
      color: var(--text-secondary);
      font-weight: 400;
    }

    .mb-btn {
      background: var(--accent);
      color: #fff;
      font-size: 14px;
      font-weight: 600;
      padding: 9px 22px;
      border-radius: 10px;
      flex-shrink: 0;
    }

    body.has-mobile-bar {
      padding-bottom: 70px;
    }
  }

  @media (max-width: 380px) {
    .brand-text strong {
      font-size: 15px;
    }

    .brand-text small {
      font-size: 10px;
    }
  }