/* roulang page: index */
:root{--primary:#0f2b46;--primary-dark:#091d30;--primary-light:#16405e;--accent:#e6a817;--accent-light:#ffd76a;--accent-dark:#c18407;--bg:#f4f6f9;--white:#fff;--text:#1e293b;--text-light:#5b6b7c;--text-lighter:#93a4b5;--border:#dfe6ee;--border-light:#eef2f6;--radius-sm:8px;--radius-md:14px;--radius-lg:22px;--shadow-sm:0 2px 6px rgba(15,43,70,.07);--shadow-md:0 6px 18px rgba(15,43,70,.09);--shadow-lg:0 16px 40px rgba(15,43,70,.14);--font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;--transition:.3s ease}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button,input,textarea{font-family:inherit;font-size:inherit}
.grid-container{max-width:1200px;padding-left:20px;padding-right:20px}
.cell{padding:0}
.container{width:min(1200px,92%);margin:0 auto}
.section{padding:96px 0}
.section-header{text-align:center;max-width:720px;margin:0 auto 56px}
.section-header .tag{display:inline-block;padding:6px 16px;border-radius:30px;background:rgba(230,168,23,.12);color:var(--accent-dark);font-size:13px;font-weight:600;letter-spacing:.5px;margin-bottom:14px}
.section-header h2{font-size:38px;line-height:1.3;font-weight:800;color:var(--primary);margin-bottom:14px}
.section-header p{color:var(--text-light);font-size:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 32px;border-radius:40px;font-size:15px;font-weight:600;transition:var(--transition);border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--accent);color:var(--primary-dark)}
.btn-primary:hover{background:var(--accent-light);transform:translateY(-3px);box-shadow:0 10px 24px rgba(230,168,23,.35)}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.btn-outline-light:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-3px)}
.btn-outline-dark{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-outline-dark:hover{background:var(--primary);color:#fff;transform:translateY(-3px)}
.site-header{position:sticky;top:0;z-index:100;background:rgba(15,43,70,.96);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08);padding:14px 0}
.site-header .header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{font-size:22px;font-weight:800;color:#fff;letter-spacing:.5px;display:flex;align-items:center;gap:10px;white-space:nowrap}
.logo::before{content:'';width:10px;height:28px;border-radius:4px;background:linear-gradient(180deg,var(--accent),var(--accent-dark))}
.logo-short{display:none}
.main-nav{display:flex;align-items:center;gap:8px}
.main-nav .nav-link{display:inline-block;padding:10px 20px;border-radius:30px;color:rgba(255,255,255,.85);font-size:15px;font-weight:500;transition:var(--transition);border:1px solid transparent}
.main-nav .nav-link:hover{color:#fff;background:rgba(255,255,255,.12)}
.main-nav .nav-link.active{color:var(--primary);background:var(--accent);font-weight:600}
.nav-cta{padding:9px 22px;border-radius:30px;background:var(--accent);color:var(--primary-dark);font-weight:600;border:1px solid rgba(255,255,255,.2);transition:var(--transition);white-space:nowrap}
.nav-cta:hover{background:var(--accent-light);transform:translateY(-2px);box-shadow:0 6px 16px rgba(230,168,23,.3)}
.hero{position:relative;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;padding:150px 0 120px;color:#fff}
.hero::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(9,29,48,.92) 0%,rgba(15,43,70,.78) 50%,rgba(22,64,94,.55) 100%)}
.hero-content{position:relative;z-index:2;max-width:700px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 18px;border-radius:40px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);font-size:13px;letter-spacing:1px;backdrop-filter:blur(6px);margin-bottom:28px}
.hero h1{font-size:54px;line-height:1.18;font-weight:900;letter-spacing:-1px;margin-bottom:22px}
.hero h1 span{color:var(--accent-light)}
.hero p.lead{font-size:18px;line-height:1.8;color:rgba(255,255,255,.85);margin-bottom:36px;max-width:560px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;gap:48px;margin-top:56px;flex-wrap:wrap}
.hero-stats .stat-val{font-size:34px;font-weight:800;letter-spacing:1px}
.hero-stats .stat-label{font-size:13px;color:rgba(255,255,255,.7);margin-top:4px;letter-spacing:.5px}
.feature-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:38px 30px;height:100%;transition:var(--transition);position:relative;overflow:hidden}
.feature-card:hover{box-shadow:var(--shadow-md);transform:translateY(-6px);border-color:rgba(230,168,23,.35)}
.feature-icon{width:58px;height:58px;border-radius:16px;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:22px}
.feature-card h3{font-size:20px;font-weight:700;color:var(--primary);margin-bottom:10px}
.feature-card p{color:var(--text-light);font-size:15px;line-height:1.75}
.category-card{border-radius:var(--radius-lg);overflow:hidden;background:var(--white);border:1px solid var(--border);box-shadow:var(--shadow-sm);transition:var(--transition);height:100%;display:flex;flex-direction:column}
.category-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-8px)}
.category-card .cat-media{position:relative;height:220px;overflow:hidden}
.category-card .cat-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.category-card:hover .cat-media img{transform:scale(1.06)}
.category-card .cat-overlay{position:absolute;inset:0;background:linear-gradient(180deg,transparent 20%,rgba(9,29,48,.72) 100%)}
.category-card .cat-body{padding:28px;flex:1;display:flex;flex-direction:column}
.category-card .cat-body .cat-tag{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--accent-dark);background:rgba(230,168,23,.12);padding:5px 12px;border-radius:20px;width:fit-content;margin-bottom:14px}
.category-card .cat-body h3{font-size:22px;font-weight:800;color:var(--primary);margin-bottom:10px}
.category-card .cat-body p{color:var(--text-light);font-size:15px;line-height:1.7;flex:1;margin-bottom:18px}
.category-card .cat-link{font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px;font-size:15px;transition:var(--transition)}
.category-card .cat-link i{transition:transform .3s}
.category-card:hover .cat-link i{transform:translateX(5px)}
.stats-band{background:var(--primary);padding:72px 0;position:relative;overflow:hidden}
.stats-band::before{content:'';position:absolute;right:-100px;top:-100px;width:300px;height:300px;background:rgba(230,168,23,.08);border-radius:50%}
.stats-band::after{content:'';position:absolute;left:50%;bottom:-140px;width:280px;height:280px;background:rgba(255,255,255,.04);border-radius:50%}
.stat-item{text-align:center;padding:24px;position:relative;z-index:1}
.stat-item .num{font-size:48px;font-weight:900;color:var(--accent-light);line-height:1.1}
.stat-item .label{color:rgba(255,255,255,.75);font-size:14px;margin-top:8px;letter-spacing:.5px}
.news-card{display:block;background:var(--white);border:1px solid var(--border);border-radius:var(--radius-md);padding:24px 26px;transition:var(--transition);margin-bottom:18px;position:relative;overflow:hidden}
.news-card::after{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--accent);transform:scaleY(0);transform-origin:center;transition:transform .3s}
.news-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);border-color:rgba(230,168,23,.3)}
.news-card:hover::after{transform:scaleY(1)}
.news-card .news-cat{display:inline-block;font-size:12px;font-weight:600;color:var(--accent-dark);background:rgba(230,168,23,.12);padding:4px 12px;border-radius:16px;margin-bottom:10px}
.news-card h3{font-size:18px;font-weight:700;color:var(--primary);margin-bottom:8px;line-height:1.5}
.news-card p{color:var(--text-light);font-size:14px;line-height:1.7;margin-bottom:12px}
.news-card .news-date{font-size:13px;color:var(--text-lighter)}
.news-side-card{display:flex;gap:14px;align-items:center;background:var(--white);border:1px solid var(--border);border-radius:var(--radius-md);padding:14px;margin-bottom:12px;transition:var(--transition)}
.news-side-card:hover{box-shadow:var(--shadow-sm);border-color:rgba(230,168,23,.3);transform:translateX(4px)}
.news-side-card img{width:88px;height:70px;object-fit:cover;border-radius:10px;flex-shrink:0}
.news-side-card .side-body h4{font-size:14px;font-weight:600;color:var(--primary);line-height:1.5;margin-bottom:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-side-card .side-body span{font-size:12px;color:var(--text-lighter)}
.step-item{text-align:center;padding:30px 20px;position:relative}
.step-num{width:64px;height:64px;border-radius:50%;background:var(--primary);color:#fff;font-size:22px;font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;position:relative;z-index:1;box-shadow:0 8px 20px rgba(15,43,70,.25)}
.step-item::after{content:'';position:absolute;top:64px;left:calc(50% + 40px);width:calc(100% - 80px);height:2px;border-top:2px dashed var(--border);z-index:0}
.step-item:last-child::after{display:none}
.step-item h4{font-size:18px;font-weight:700;color:var(--primary);margin-bottom:10px}
.step-item p{font-size:14px;color:var(--text-light);line-height:1.6}
.faq-item{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-md);padding:24px 28px;margin-bottom:16px;transition:var(--transition)}
.faq-item:hover{box-shadow:var(--shadow-sm);border-color:rgba(15,43,70,.15)}
.faq-item h4{font-size:17px;font-weight:700;color:var(--primary);margin-bottom:10px;display:flex;align-items:center;gap:10px}
.faq-item h4::before{content:'Q';width:28px;height:28px;border-radius:50%;background:rgba(230,168,23,.15);color:var(--accent-dark);font-size:14px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}
.faq-item p{color:var(--text-light);font-size:15px;line-height:1.75;padding-left:38px}
.cta-band{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);padding:88px 0;color:#fff;position:relative;overflow:hidden}
.cta-band::before{content:'';position:absolute;right:-60px;top:-60px;width:240px;height:240px;background:rgba(230,168,23,.12);border-radius:50%}
.cta-band h2{font-size:36px;font-weight:800;margin-bottom:14px}
.cta-band p{color:rgba(255,255,255,.8);font-size:17px;margin-bottom:32px;max-width:600px}
.site-footer{background:var(--primary-dark);color:rgba(255,255,255,.65);padding:56px 0 30px}
.site-footer h4{color:#fff;font-size:18px;font-weight:700;margin-bottom:16px}
.site-footer p{font-size:14px;line-height:1.8}
.site-footer .footer-links a{display:inline-block;color:rgba(255,255,255,.65);font-size:14px;line-height:1.8;transition:var(--transition)}
.site-footer .footer-links a:hover{color:var(--accent-light)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding-top:24px;text-align:center;font-size:14px}
.mobile-bottom-tab{display:none;position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--border);z-index:200;padding:6px 0 calc(6px + env(safe-area-inset-bottom));box-shadow:0 -4px 20px rgba(15,43,70,.06)}
.mobile-bottom-tab .tab-list{display:flex;justify-content:space-around;align-items:center}
.mobile-bottom-tab .tab-item{display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 14px;color:var(--text-lighter);font-size:12px;font-weight:500;transition:var(--transition);border-radius:12px}
.mobile-bottom-tab .tab-item i{font-size:20px}
.mobile-bottom-tab .tab-item.active{color:var(--accent-dark)}
.tag-badge{display:inline-block;padding:5px 14px;border-radius:20px;background:rgba(230,168,23,.12);color:var(--accent-dark);font-size:13px;font-weight:600}
@media(max-width:1024px){
.hero{padding:130px 0 100px}
.hero h1{font-size:46px}
.section{padding:80px 0}
.section-header h2{font-size:32px}
}
@media(max-width:768px){
.site-header{padding:10px 0}
.logo-short{display:inline}
.logo-full{display:none}
.main-nav{display:none}
.nav-cta{display:none}
.hero{padding:110px 0 80px}
.hero h1{font-size:36px;letter-spacing:0}
.hero p.lead{font-size:16px}
.hero-stats{gap:28px;margin-top:40px}
.hero-stats .stat-val{font-size:28px}
.hero-stats .stat-label{font-size:12px}
.section{padding:56px 0}
.section-header{margin-bottom:36px}
.section-header h2{font-size:28px}
.stats-band{padding:48px 0}
.stat-item .num{font-size:34px}
.step-item::after{display:none}
.cta-band h2{font-size:28px}
.cta-band p{font-size:15px}
.mobile-bottom-tab{display:block}
body{padding-bottom:64px}
.site-footer{padding:40px 0 90px}
}
@media(max-width:520px){
.container{width:90%}
.hero-stats{gap:20px}
.hero-stats .stat-val{font-size:24px}
.hero-actions .btn{width:100%}
.section-header h2{font-size:24px}
.stat-item{padding:16px}
.stat-item .num{font-size:28px}
}

/* roulang page: article */
:root {
  --primary: #0f4c81;
  --primary-dark: #0a3a63;
  --primary-light: #e8f0fe;
  --accent: #f0a500;
  --accent-light: #fff4d6;
  --bg: #f4f6fb;
  --white: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
  --shadow-md: 0 6px 24px rgba(0,0,0,.08);
  --shadow-lg: 0 16px 40px rgba(0,0,0,.12);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: all .25s ease;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== 顶部导航 ===== */
.site-header {
  background: rgba(255,255,255,0.96);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
  padding: 14px 0;
  position: sticky;
  top: 0;
  z-index: 200;
  border-bottom: 1px solid var(--border);
}
.site-header .grid-container {
  max-width: 1280px;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 20px;
}
.logo {
  display: inline-flex;
  align-items: center;
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: .5px;
  gap: 8px;
  line-height: 1.2;
}
.logo i { color: var(--accent); font-size: 20px; }
.logo-short { display: none; }
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.main-nav .nav-link {
  padding: 9px 18px;
  border-radius: 999px;
  font-weight: 500;
  color: var(--text);
  font-size: 15px;
  transition: var(--transition);
}
.main-nav .nav-link:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.main-nav .nav-link.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(15,76,129,.3);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #0f4c81, #1a6fb5);
  color: #fff;
  padding: 10px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-cta:hover {
  background: linear-gradient(135deg, #0a3a63, #0f4c81);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ===== 页面 Banner ===== */
.page-banner {
  padding: 72px 0 64px;
  background: linear-gradient(135deg, rgba(8,32,58,.94), rgba(15,76,129,.82)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color: #fff;
  position: relative;
}
.page-banner .grid-container {
  max-width: 1280px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 14px;
  color: rgba(255,255,255,.75);
  margin-bottom: 18px;
}
.breadcrumb a { color: rgba(255,255,255,.85); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb i { font-size: 10px; color: rgba(255,255,255,.5); }
.breadcrumb span { color: var(--accent); font-weight: 500; }
.banner-title {
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.3;
  margin: 0 0 16px;
  max-width: 860px;
  letter-spacing: .5px;
  word-break: break-word;
}
.banner-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px 24px;
  font-size: 14px;
  color: rgba(255,255,255,.85);
}
.banner-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.banner-meta .meta-item i { color: var(--accent); }

/* ===== 文章主体 ===== */
.article-main {
  padding: 48px 0 60px;
}
.article-main .grid-container {
  max-width: 1280px;
}
.article-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.article-card:hover { box-shadow: var(--shadow-md); }
.article-cover {
  width: 100%;
  height: 320px;
  object-fit: cover;
}
.article-content-body {
  padding: 36px 40px 40px;
}
.article-content-body h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 32px 0 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
  color: var(--primary-dark);
}
.article-content-body h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 28px 0 12px;
  color: var(--text);
}
.article-content-body h4 {
  font-size: 17px;
  font-weight: 600;
  margin: 22px 0 10px;
  color: var(--text);
}
.article-content-body p {
  margin: 16px 0;
  line-height: 1.85;
  color: #2d3a4e;
}
.article-content-body ul,
.article-content-body ol {
  margin: 16px 0 16px 26px;
  line-height: 1.8;
}
.article-content-body li { margin: 8px 0; }
.article-content-body blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  padding: 18px 22px;
  border-radius: 0 10px 10px 0;
  margin: 22px 0;
  color: var(--primary-dark);
  font-weight: 500;
}
.article-content-body img {
  border-radius: var(--radius-sm);
  margin: 20px 0;
  box-shadow: var(--shadow-sm);
}
.article-content-body a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 15px;
}
.article-content-body th,
.article-content-body td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}
.article-content-body th { background: var(--primary-light); font-weight: 600; color: var(--primary-dark); }
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 24px 40px 30px;
  border-top: 1px solid var(--border);
  background: #fafbfe;
}
.article-tags .tag-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-light);
  font-weight: 600;
}
.article-tags .tag-item {
  display: inline-block;
  padding: 5px 14px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition);
}
.article-tags .tag-item:hover { background: var(--primary); color: #fff; }

/* ===== 侧边栏 ===== */
.sidebar-card {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 26px;
  margin-bottom: 24px;
  transition: var(--transition);
}
.sidebar-card:hover { box-shadow: var(--shadow-md); }
.sidebar-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-card h3 i { color: var(--accent); }
.sidebar-links { display: flex; flex-direction: column; gap: 8px; }
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--bg);
  border: 1px solid transparent;
  transition: var(--transition);
  color: var(--text);
  font-weight: 500;
  font-size: 14px;
}
.sidebar-link i { color: var(--primary); width: 20px; text-align: center; font-size: 15px; }
.sidebar-link:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary); transform: translateX(3px); }
.sidebar-link.active { background: var(--primary); color: #fff; }
.sidebar-link.active i { color: #fff; }
.sidebar-list { list-style: none; margin: 0; padding: 0; }
.sidebar-list li { border-bottom: 1px dashed var(--border); }
.sidebar-list li:last-child { border-bottom: 0; }
.sidebar-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 0;
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  transition: var(--transition);
}
.sidebar-list a:hover { color: var(--primary); padding-left: 4px; }
.sidebar-list a i { font-size: 12px; color: var(--accent); }
.sidebar-list .list-date { margin-left: auto; font-size: 12px; color: var(--text-light); white-space: nowrap; flex-shrink: 0; }
.sidebar-security {
  background: linear-gradient(135deg, #0a3a63, #0f4c81);
  color: #fff;
  border: none;
}
.sidebar-security h3 { color: #fff; border-color: rgba(255,255,255,.2); }
.sidebar-security h3 i { color: var(--accent); }
.sidebar-security p { font-size: 14px; color: rgba(255,255,255,.85); margin: 12px 0 20px; line-height: 1.7; }
.sidebar-security .button {
  background: var(--accent);
  color: #1e293b;
  font-weight: 700;
  border-radius: 999px;
  padding: 10px 22px;
  font-size: 14px;
  transition: var(--transition);
  margin-bottom: 0;
}
.sidebar-security .button:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(240,165,0,.35); }

/* ===== 推荐阅读 ===== */
.related-section {
  padding: 0 0 60px;
}
.related-section .grid-container { max-width: 1280px; }
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}
.section-head h2 {
  font-size: 26px;
  font-weight: 800;
  color: var(--text);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-head h2 i { color: var(--accent); }
.rel-card {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: var(--transition);
}
.rel-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--primary-light); }
.rel-thumb {
  height: 160px;
  background-size: cover;
  background-position: center;
  position: relative;
}
.rel-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(8,32,58,.55), transparent);
}
.rel-info { padding: 20px 22px 22px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.rel-info .badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  width: fit-content;
}
.rel-info h3 { font-size: 16px; font-weight: 600; margin: 0; line-height: 1.5; color: var(--text); transition: var(--transition); }
.rel-card:hover .rel-info h3 { color: var(--primary); }
.rel-info p { font-size: 13px; color: var(--text-light); margin: 0; line-height: 1.6; flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.rel-date { font-size: 12px; color: var(--text-light); display: flex; align-items: center; gap: 6px; }

/* ===== CTA ===== */
.cta-section {
  padding: 64px 0;
  background: linear-gradient(135deg, #0a3a63 0%, #0f4c81 50%, #1a6fb5 100%);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 260px; height: 260px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
}
.cta-section::after {
  content: '';
  position: absolute;
  bottom: -80px; left: -40px;
  width: 180px; height: 180px;
  border-radius: 50%;
  background: rgba(240,165,0,.12);
}
.cta-wrap {
  text-align: center;
  color: #fff;
  position: relative;
  z-index: 1;
}
.cta-wrap h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 800; margin: 0 0 12px; }
.cta-wrap p { font-size: 16px; color: rgba(255,255,255,.85); max-width: 560px; margin: 0 auto 28px; line-height: 1.7; }
.cta-buttons { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #1e293b;
  font-weight: 700;
  font-size: 15px;
  padding: 13px 30px;
  border-radius: 999px;
  transition: var(--transition);
  box-shadow: 0 4px 18px rgba(240,165,0,.35);
}
.cta-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(240,165,0,.5); color: #1e293b; }
.cta-btn-line {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1.5px solid rgba(255,255,255,.6);
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  padding: 13px 30px;
  border-radius: 999px;
  transition: var(--transition);
}
.cta-btn-line:hover { background: rgba(255,255,255,.12); color: #fff; border-color: #fff; }

/* ===== 页脚 ===== */
.site-footer {
  background: #0b1a2b;
  color: rgba(255,255,255,.8);
  padding: 56px 0 24px;
  font-size: 14px;
}
.site-footer .grid-container { max-width: 1280px; }
.site-footer h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.site-footer h4::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 28px; height: 3px;
  border-radius: 2px;
  background: var(--accent);
}
.site-footer a { color: rgba(255,255,255,.7); }
.site-footer a:hover { color: var(--accent); }
.site-footer .footer-links a {
  display: inline-block;
  padding: 5px 0;
  font-weight: 500;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12);
  margin-top: 36px;
  padding-top: 22px;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,.55);
}

/* ===== 内容未找到 ===== */
.not-found-content {
  text-align: center;
  padding: 80px 40px;
}
.not-found-content i { font-size: 48px; color: var(--primary-light); margin-bottom: 18px; }
.not-found-content h2 { font-size: 26px; font-weight: 700; color: var(--text); margin: 0 0 8px; }
.not-found-content p { color: var(--text-light); margin: 0 0 24px; }
.not-found-content .button {
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  padding: 12px 28px;
  font-weight: 600;
  transition: var(--transition);
}
.not-found-content .button:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* ===== 移动端底部 Tab ===== */
.mobile-tab-bar {
  display: none;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .article-content-body { padding: 28px 28px 32px; }
  .article-tags { padding: 20px 28px 24px; }
  .page-banner { padding: 54px 0 48px; }
}
@media (max-width: 768px) {
  .site-header { padding: 12px 0; }
  .header-inner { gap: 12px; }
  .main-nav, .nav-cta { display: none; }
  .logo-full { display: none; }
  .logo-short { display: inline-block; font-size: 22px; }
  .page-banner { padding: 44px 0 40px; }
  .banner-title { font-size: 28px; }
  .article-main { padding: 26px 0 40px; }
  .article-cover { height: 210px; }
  .article-content-body { padding: 22px 20px 26px; }
  .article-tags { padding: 18px 20px 22px; }
  .sidebar-card { padding: 20px; margin-bottom: 20px; }
  .section-head h2 { font-size: 22px; }
  .section-head { margin-bottom: 20px; }
  .cta-section { padding: 48px 0; }
  body { padding-bottom: 66px; }
  .mobile-tab-bar {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255,255,255,.98);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--border);
    box-shadow: 0 -2px 12px rgba(0,0,0,.05);
    z-index: 1000;
    padding: 6px 10px calc(6px + env(safe-area-inset-bottom));
    justify-content: space-around;
  }
  .mobile-tab-bar .tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    padding: 6px 12px;
    font-size: 11px;
    color: var(--text-light);
    border-radius: 10px;
    transition: var(--transition);
    font-weight: 500;
  }
  .mobile-tab-bar .tab-item i { font-size: 18px; }
  .mobile-tab-bar .tab-item.active { color: var(--primary); background: var(--primary-light); }
  .mobile-tab-bar .tab-item:hover { color: var(--primary); }
  .footer-bottom { font-size: 12px; }
}
@media (max-width: 520px) {
  .page-banner { padding: 36px 0 32px; }
  .banner-title { font-size: 24px; }
  .banner-meta { gap: 10px 16px; font-size: 13px; }
  .article-cover { height: 180px; }
  .article-content-body { padding: 18px 16px 22px; }
  .article-content-body h2 { font-size: 20px; }
  .article-content-body h3 { font-size: 17px; }
  .article-tags { padding: 16px; }
  .cta-buttons .cta-btn, .cta-buttons .cta-btn-line { width: 100%; justify-content: center; }
  .rel-info h3 { font-size: 15px; }
  .rel-info p { display: none; }
  .site-footer { padding: 40px 0 20px; }
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(240,165,0,.5);
  outline-offset: 2px;
}

/* roulang page: category1 */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --accent: #f59e0b;
  --text: #0f172a;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --bg-deep: #0f172a;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 10px 30px rgba(15, 23, 42, .08);
  --shadow-hover: 0 18px 40px rgba(15, 23, 42, .12);
  --section-space: 96px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: inline-block; vertical-align: middle; }
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-dark); }
button, input, select { font-family: inherit; }
ul, ol, dl, dd, p, figure, blockquote { margin: 0; padding: 0; list-style: none; }
.grid-container { max-width: 1200px; }
::selection { background: var(--primary-light); color: var(--primary-dark); }

:focus-visible { outline: 3px solid rgba(37, 99, 235, .45); outline-offset: 2px; }

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 16px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.22rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: .2px;
  white-space: nowrap;
}
.logo i { color: var(--accent); }
.logo-short { display: none; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 18px;
  border-radius: 999px;
  font-weight: 600;
  font-size: .94rem;
  color: var(--text-weak);
  transition: background .2s ease, color .2s ease, transform .2s ease;
}
.nav-link:hover { background: var(--primary-light); color: var(--primary); transform: translateY(-1px); }
.nav-link.active { background: var(--primary-light); color: var(--primary); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-size: .9rem;
  font-weight: 600;
  box-shadow: 0 6px 16px rgba(37, 99, 235, .28);
  transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
}
.nav-cta:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(37, 99, 235, .36); }

/* ===== 通用区块 ===== */
.section { padding: var(--section-space) 0; }
.section-head { max-width: 760px; margin: 0 auto 52px; text-align: center; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: .83rem;
  font-weight: 700;
  letter-spacing: .4px;
}
.section-title { font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 800; line-height: 1.25; margin: 14px 0 14px; letter-spacing: -.5px; }
.section-sub { font-size: 1.04rem; color: var(--text-weak); line-height: 1.8; }
.text-center { text-align: center; }

/* ===== 首屏 ===== */
.page-hero {
  position: relative;
  padding: 110px 0 94px;
  background: linear-gradient(98deg, rgba(15, 23, 42, .93) 0%, rgba(30, 58, 138, .88) 50%, rgba(37, 99, 235, .82) 100%), url('/assets/images/backpic/back-2.png') center/cover;
  color: #fff;
  overflow: hidden;
}
.hero-content { max-width: 900px; }
.hero-tag-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 20px; }
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .22);
  font-size: .86rem;
  font-weight: 600;
  backdrop-filter: blur(6px);
}
.hero-tag i { color: #fbbf24; }
.hero-title { font-size: clamp(2rem, 4.6vw, 3.4rem); font-weight: 900; line-height: 1.18; margin: 0 0 18px; letter-spacing: -1px; }
.hero-sub { font-size: 1.08rem; line-height: 1.85; color: rgba(255, 255, 255, .9); max-width: 680px; margin-bottom: 34px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 52px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: .96rem;
  border: none;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}
.btn-primary { background: var(--accent); color: #0f172a; box-shadow: 0 10px 26px rgba(245, 158, 11, .35); }
.btn-primary:hover { background: #fbbf24; color: #0f172a; transform: translateY(-2px); box-shadow: 0 14px 34px rgba(245, 158, 11, .42); }
.btn-light { background: rgba(255, 255, 255, .12); color: #fff; border: 1px solid rgba(255, 255, 255, .28); backdrop-filter: blur(6px); }
.btn-light:hover { background: rgba(255, 255, 255, .24); color: #fff; transform: translateY(-2px); }
.hero-stats { display: flex; flex-wrap: wrap; gap: 34px; padding-top: 32px; border-top: 1px solid rgba(255, 255, 255, .2); }
.stat-item { text-align: left; }
.stat-num { display: block; font-size: 1.7rem; font-weight: 800; line-height: 1.2; color: #fff; }
.stat-label { font-size: .88rem; color: rgba(255, 255, 255, .78); margin-top: 4px; }

/* ===== 登录前准备 ===== */
.prep-section { background: var(--bg); }
.prep-cards { display: flex; flex-wrap: wrap; gap: 24px; }
.prep-card {
  flex: 1 1 0;
  min-width: 250px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.prep-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: rgba(37, 99, 235, .4); }
.prep-icon {
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 1.3rem;
  margin-bottom: 18px;
}
.prep-card h3 { font-size: 1.14rem; font-weight: 700; margin: 0 0 10px; }
.prep-card p { color: var(--text-weak); font-size: .94rem; line-height: 1.75; }

/* ===== 标准登录流程 ===== */
.steps-section { background: var(--bg-soft); }
.steps-wrap { display: flex; flex-wrap: wrap; gap: 24px; counter-reset: step; }
.step-item {
  flex: 1 1 0;
  min-width: 230px;
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px 28px;
  box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease;
}
.step-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.step-num {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: 1.05rem;
  margin-bottom: 16px;
  box-shadow: 0 8px 20px rgba(37, 99, 235, .3);
}
.step-title { font-size: 1.08rem; font-weight: 700; margin: 0 0 8px; }
.step-text { color: var(--text-weak); font-size: .93rem; line-height: 1.75; }

/* ===== 设备与场景 ===== */
.device-section { background: var(--bg); }
.device-grid { display: flex; flex-wrap: wrap; gap: 24px; }
.device-card {
  flex: 1 1 0;
  min-width: 280px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease;
}
.device-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.device-media { height: 190px; overflow: hidden; position: relative; background: var(--bg-soft); }
.device-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.device-card:hover .device-media img { transform: scale(1.05); }
.device-body { padding: 24px 24px 28px; }
.device-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: .8rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.device-body h3 { font-size: 1.1rem; font-weight: 700; margin: 0 0 8px; }
.device-body p { color: var(--text-weak); font-size: .93rem; line-height: 1.75; }

/* ===== 常见问题自查 ===== */
.trouble-section { background: var(--bg-soft); }
.trouble-list { display: flex; flex-direction: column; gap: 16px; max-width: 900px; margin: 0 auto; }
.trouble-item {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 26px;
  box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease;
}
.trouble-item:hover { transform: translateX(6px); box-shadow: var(--shadow-hover); }
.trouble-icon {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: #fef3c7;
  color: #d97706;
  font-size: 1.05rem;
}
.trouble-item h3 { font-size: 1.02rem; font-weight: 700; margin: 0 0 4px; }
.trouble-item p { color: var(--text-weak); font-size: .92rem; line-height: 1.7; }

/* ===== FAQ ===== */
.faq-section { background: var(--bg); }
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  overflow: hidden;
  box-shadow: 0 4px 14px rgba(15, 23, 42, .04);
  transition: box-shadow .2s ease, border-color .2s ease;
}
.faq-item:hover { border-color: rgba(37, 99, 235, .35); box-shadow: var(--shadow); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 26px;
  font-weight: 700;
  font-size: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  color: var(--primary);
  transition: transform .25s ease;
}
.faq-item[open] summary::after { transform: rotate(180deg); }
.faq-item[open] { border-color: rgba(37, 99, 235, .4); }
.faq-answer { padding: 0 26px 24px; color: var(--text-weak); font-size: .95rem; line-height: 1.8; }

/* ===== CTA ===== */
.cta-section { background: var(--bg-soft); }
.cta-box {
  position: relative;
  background: linear-gradient(100deg, #0f172a, #1e3a8a), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  background-blend-mode: overlay;
  border-radius: 24px;
  padding: 60px 56px;
  color: #fff;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}
.cta-box h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); font-weight: 800; margin: 0 0 10px; }
.cta-box p { color: rgba(255, 255, 255, .84); font-size: 1rem; max-width: 480px; line-height: 1.8; }
.cta-buttons { display: flex; flex-wrap: wrap; gap: 14px; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-deep);
  color: #cbd5e1;
  padding: 64px 0 34px;
}
.site-footer .logo { color: #fff; margin-bottom: 16px; }
.site-footer h4 { color: #fff; font-size: 1rem; font-weight: 700; margin: 0 0 16px; }
.site-footer p { color: #94a3b8; font-size: .92rem; line-height: 1.8; }
.footer-links a { display: inline-block; color: #94a3b8; font-size: .93rem; margin-bottom: 8px; transition: color .2s ease, transform .2s ease; }
.footer-links a:hover { color: #fff; transform: translateX(4px); }
.footer-links a i { margin-right: 6px; font-size: .8rem; color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  margin-top: 40px;
  padding-top: 22px;
  text-align: center;
  font-size: .88rem;
  color: #94a3b8;
}

/* ===== 移动端底部 Tab ===== */
.bottom-tab {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 80;
  display: none;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  box-shadow: 0 -8px 24px rgba(15, 23, 42, .06);
  padding: 6px 12px calc(6px + env(safe-area-inset-bottom));
}
.tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 7px 4px;
  border-radius: 12px;
  color: var(--text-weak);
  font-size: .74rem;
  font-weight: 600;
  transition: color .2s ease, background .2s ease;
}
.tab-item i { font-size: 1.15rem; }
.tab-item:hover, .tab-item.active { color: var(--primary); background: var(--primary-light); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .prep-card { flex: 1 1 42%; }
  .step-item { flex: 1 1 42%; }
  .device-card { flex: 1 1 42%; }
  .hero-stats { gap: 24px; }
}

@media (max-width: 768px) {
  :root { --section-space: 70px; }
  .main-nav { display: none; }
  .header-inner { min-height: 60px; }
  .logo-full { display: none; }
  .logo-short { display: inline; }
  .nav-cta { padding: 8px 16px; font-size: .84rem; }
  .page-hero { padding: 88px 0 70px; }
  .hero-actions { margin-bottom: 40px; }
  .hero-stats { gap: 18px; }
  .stat-num { font-size: 1.35rem; }
  .prep-card, .step-item, .device-card { flex: 1 1 100%; }
  .cta-box { padding: 40px 28px; }
  .bottom-tab { display: flex; }
  body { padding-bottom: 70px; }
  .footer-bottom { text-align: left; }
}

@media (max-width: 520px) {
  .section-head { margin-bottom: 38px; }
  .hero-title { font-size: 1.9rem; }
  .hero-sub { font-size: .98rem; }
  .btn { width: 100%; }
  .hero-stats { flex-direction: column; gap: 14px; }
  .trouble-item { flex-direction: column; gap: 10px; padding: 20px; }
  .faq-item summary { padding: 18px 20px; font-size: .95rem; }
  .faq-answer { padding: 0 20px 20px; }
  .cta-box { padding: 34px 24px; }
  .site-footer { padding: 48px 0 28px; }
}

/* roulang page: category2 */
:root {
  --primary: #123b63;
  --primary-dark: #0a2540;
  --primary-light: #1e5c8f;
  --accent: #10b981;
  --accent-light: #d1fae5;
  --bg: #f5f7fb;
  --bg-white: #ffffff;
  --text: #1a2233;
  --text-weak: #667388;
  --border: #e3e8ee;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 2px 4px rgba(0,0,0,.04), 0 6px 24px rgba(18,59,99,.06);
  --shadow-lg: 0 4px 8px rgba(0,0,0,.05), 0 12px 32px rgba(18,59,99,.10);
  --transition: all .3s ease;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; }
.container-fluid { padding: 0 24px; }
.grid-container { max-width: 1200px; }
:focus-visible {
  outline: 3px solid rgba(16,185,129,.5);
  outline-offset: 2px;
}

/* ===== Header ===== */
.site-header {
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .grid-container { max-width: 1320px; }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  font-size: 20px;
  font-weight: 800;
  color: var(--primary-dark) !important;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.3px;
}
.logo-short { display: none; }
.main-nav { display: flex; gap: 6px; align-items: center; }
.nav-link {
  padding: 9px 18px;
  border-radius: 999px;
  font-weight: 600;
  color: var(--text-weak);
  font-size: 15px;
  background: transparent;
  transition: var(--transition);
}
.nav-link:hover { color: var(--primary); background: #f0f4f8; }
.nav-link.active { color: #fff; background: var(--primary); box-shadow: 0 4px 12px rgba(18,59,99,.25); }
.nav-cta {
  padding: 10px 22px;
  background: var(--accent);
  color: #fff !important;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(16,185,129,.3);
  transition: var(--transition);
}
.nav-cta:hover { background: #059669; transform: translateY(-1px); box-shadow: 0 6px 18px rgba(16,185,129,.4); }

/* ===== Mobile Tab Nav ===== */
.mobile-tab-nav {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  z-index: 300;
  padding: 8px 10px 10px;
  box-shadow: 0 -4px 24px rgba(0,0,0,.06);
}
.mobile-tab-nav .mobile-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--text-weak);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 0;
  border-radius: 10px;
  transition: var(--transition);
}
.mobile-tab-nav .mobile-tab i { font-size: 20px; }
.mobile-tab-nav .mobile-tab.active { color: var(--primary); background: rgba(18,59,99,.06); }

/* ===== Hero ===== */
.security-hero {
  position: relative;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  padding: 120px 0 140px;
  overflow: hidden;
}
.security-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10,37,64,.94) 0%, rgba(10,37,64,.75) 55%, rgba(10,37,64,.5) 100%);
}
.security-hero .grid-container { position: relative; z-index: 2; }
.hero-content { max-width: 680px; color: #fff; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.25);
  padding: 7px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 26px;
  backdrop-filter: blur(8px);
}
.hero-badge i { color: var(--accent); }
.hero-content h1 {
  font-size: 44px;
  line-height: 1.2;
  font-weight: 800;
  color: #fff;
  letter-spacing: -1px;
  margin-bottom: 20px;
}
.hero-content h1 span {
  display: block;
  font-size: 28px;
  font-weight: 600;
  color: rgba(255,255,255,.85);
  margin-top: 10px;
  letter-spacing: 0;
}
.hero-content p {
  font-size: 17px;
  color: rgba(255,255,255,.8);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.8;
}
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: #fff !important; box-shadow: 0 6px 20px rgba(16,185,129,.35); }
.btn-primary:hover { background: #059669; transform: translateY(-2px); box-shadow: 0 10px 26px rgba(16,185,129,.42); }
.btn-outline { background: transparent; color: #fff !important; border: 1.5px solid rgba(255,255,255,.65); }
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,.1); transform: translateY(-2px); }

/* ===== Section ===== */
.section { padding: 90px 0; }
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-light);
  color: #059669;
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 16px;
}
.section-header h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}
.section-header p {
  font-size: 16px;
  color: var(--text-weak);
  line-height: 1.7;
}

/* ===== Overview Card ===== */
.overview-section { background: var(--bg-white); }
.overview-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  height: 100%;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.overview-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}
.overview-card:hover::before { opacity: 1; }
.overview-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.overview-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--primary);
  background: rgba(18,59,99,.08);
  margin-bottom: 20px;
  transition: var(--transition);
}
.overview-card:hover .overview-icon { color: #fff; background: var(--primary); }
.overview-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}
.overview-card p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.75;
  margin-bottom: 0;
}

/* ===== Defense Matrix ===== */
.matrix-section { background: var(--bg); }
.defense-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  height: 100%;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.defense-card::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  opacity: 0;
  transition: var(--transition);
}
.defense-card:hover::before { opacity: 1; }
.defense-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.defense-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  color: var(--primary);
  background: rgba(18,59,99,.07);
  margin-bottom: 18px;
  transition: var(--transition);
}
.defense-card:hover .defense-icon { color: #fff; background: var(--primary); }
.defense-card h3 { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.defense-card p { font-size: 14px; color: var(--text-weak); line-height: 1.7; margin-bottom: 0; }

/* ===== Stats ===== */
.stats-section {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  padding: 70px 0;
  position: relative;
  overflow: hidden;
}
.stats-section::after {
  content: '';
  position: absolute;
  top: -50%; right: -20%;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: rgba(255,255,255,.04);
}
.stats-section::before {
  content: '';
  position: absolute;
  bottom: -60%; left: -10%;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: rgba(16,185,129,.08);
}
.stats-section .grid-container { position: relative; z-index: 2; }
.stat-item { text-align: center; padding: 16px 10px; }
.stat-num {
  font-size: 46px;
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 6px;
}
.stat-num span { color: var(--accent); }
.stat-label {
  font-size: 14px;
  color: rgba(255,255,255,.75);
  font-weight: 600;
  letter-spacing: 1px;
}

/* ===== Process ===== */
.process-section { background: var(--bg-white); }
.process-step {
  text-align: center;
  padding: 36px 26px;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--border);
  height: 100%;
  position: relative;
  transition: var(--transition);
}
.process-step:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.step-num {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.step-tag {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-light);
  padding: 4px 14px;
  border-radius: 999px;
  display: inline-block;
  margin-bottom: 14px;
}
.process-step h3 { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.process-step p { font-size: 14px; color: var(--text-weak); line-height: 1.7; margin-bottom: 0; }

/* ===== Articles ===== */
.articles-section { background: var(--bg); }
.article-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.article-thumb {
  position: relative;
  overflow: hidden;
  height: 180px;
}
.article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.article-card:hover .article-thumb img { transform: scale(1.06); }
.article-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(10,37,64,.2), transparent 60%);
}
.article-tag {
  position: absolute;
  top: 16px; left: 16px;
  z-index: 2;
  background: rgba(255,255,255,.92);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}
.article-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.article-body h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 10px;
}
.article-body p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #9aa7b5;
}
.article-meta i { color: var(--accent); }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-white); }
.faq-wrap { max-width: 800px; margin: 0 auto; }
.accordion {
  background: transparent !important;
  border: none;
  margin: 0;
}
.accordion-item {
  list-style: none !important;
  margin-bottom: 14px;
  border: 1px solid var(--border) !important;
  border-radius: 14px !important;
  background: var(--bg-white);
  overflow: hidden;
  transition: var(--transition);
}
.accordion-item:hover { border-color: rgba(18,59,99,.25) !important; box-shadow: var(--shadow); }
.accordion-title {
  font-size: 16px;
  font-weight: 600;
  padding: 20px 26px;
  color: var(--text);
  background: var(--bg-white) !important;
  display: flex;
  align-items: center;
  gap: 12px;
}
.accordion-title::before {
  content: '\f059';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  color: var(--accent);
  font-size: 18px;
}
.accordion-title:hover, .accordion-title:focus {
  color: var(--primary);
  background: var(--bg-white) !important;
}
.accordion-content {
  border: none !important;
  background: var(--bg-white);
  color: var(--text-weak);
  line-height: 1.8;
  padding: 0 26px 22px 51px;
  font-size: 15px;
}
.accordion-content p:last-child { margin-bottom: 0; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 100%);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::after {
  content: '';
  position: absolute;
  top: -100px; right: -60px;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: rgba(16,185,129,.15);
}
.cta-inner { text-align: center; position: relative; z-index: 2; }
.cta-inner h2 {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.cta-inner p {
  font-size: 16px;
  color: rgba(255,255,255,.8);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.8;
}
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-light { background: #fff; color: var(--primary) !important; box-shadow: 0 6px 20px rgba(0,0,0,.15); }
.btn-light:hover { background: #f0f4f8; transform: translateY(-2px); box-shadow: 0 10px 26px rgba(0,0,0,.2); }
.btn-green { background: var(--accent); color: #fff !important; box-shadow: 0 6px 20px rgba(16,185,129,.35); }
.btn-green:hover { background: #059669; transform: translateY(-2px); }

/* ===== Footer ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,.75);
  padding: 60px 0 30px;
}
.site-footer .logo { color: #fff !important; font-size: 20px; }
.site-footer h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}
.site-footer p { font-size: 14px; line-height: 1.7; margin-bottom: 0; }
.footer-links a {
  display: inline-block;
  color: rgba(255,255,255,.7);
  font-size: 14px;
  padding: 4px 0;
  transition: var(--transition);
}
.footer-links a:hover { color: #fff; transform: translateX(3px); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  margin-top: 48px;
  padding-top: 22px;
  text-align: center;
  font-size: 14px;
  color: rgba(255,255,255,.45);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-content h1 { font-size: 38px; }
  .hero-content h1 span { font-size: 24px; }
  .section { padding: 70px 0; }
  .section-header h2 { font-size: 30px; }
  .stat-num { font-size: 38px; }
}
@media (max-width: 768px) {
  .site-header .main-nav, .site-header .nav-cta { display: none; }
  .mobile-tab-nav { display: flex; }
  body { padding-bottom: 66px; }
  .logo-full { display: none; }
  .logo-short { display: inline; }
  .header-inner { height: 64px; }
  .security-hero { padding: 80px 0 100px; }
  .hero-content h1 { font-size: 32px; }
  .hero-content h1 span { font-size: 20px; }
  .hero-content p { font-size: 15px; }
  .hero-buttons { flex-direction: column; align-items: flex-start; }
  .btn { width: 100%; justify-content: center; }
  .section { padding: 58px 0; }
  .section-header { margin-bottom: 36px; }
  .section-header h2 { font-size: 25px; }
  .stat-num { font-size: 34px; }
  .stat-label { font-size: 13px; }
  .stats-section { padding: 50px 0; }
  .process-step { padding: 26px 18px; }
  .cta-inner h2 { font-size: 26px; }
  .accordion-title { font-size: 15px; padding: 16px 18px; }
  .accordion-content { padding: 0 18px 18px 44px; font-size: 14px; }
  .site-footer { padding: 46px 0 26px; }
  .site-footer .cell { margin-bottom: 30px; }
}
@media (max-width: 520px) {
  .security-hero { padding: 64px 0 80px; }
  .hero-content h1 { font-size: 27px; }
  .hero-content h1 span { font-size: 18px; }
  .hero-badge { font-size: 12px; padding: 6px 14px; }
  .grid-container { padding: 0 18px; }
  .overview-card { padding: 24px 20px; }
  .defense-card { padding: 22px 18px; }
  .article-body { padding: 20px; }
  .article-thumb { height: 150px; }
}