/* roulang page: index */
:root{
  --primary:#1e4fff;
  --primary-dark:#1437c7;
  --primary-light:#e8eeff;
  --accent:#ff7a1a;
  --accent-light:#fff1e6;
  --success:#10b981;
  --success-light:#e6faf2;
  --bg:#f4f6fb;
  --bg-white:#ffffff;
  --bg-dark:#0d1526;
  --text:#0f172a;
  --text-muted:#5b6b82;
  --border:#dfe5ef;
  --radius:18px;
  --radius-sm:12px;
  --radius-lg:26px;
  --shadow-sm:0 2px 8px rgba(15,23,42,.05);
  --shadow-md:0 8px 28px rgba(15,23,42,.08);
  --shadow-lg:0 18px 48px rgba(15,23,42,.12);
  --container-w:1200px;
  --header-h:76px;
  --btn-radius:14px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(30,79,255,.35);outline-offset:2px;border-radius:4px}
button{border:none;background:none;cursor:pointer;font-family:inherit}
input,textarea{font-family:inherit;font-size:inherit}
ul,ol{list-style:none}
.container{max-width:var(--container-w);margin:0 auto;padding:0 24px;width:100%}
.container-narrow{max-width:880px}
.section{padding:100px 0}
.section-alt{background:var(--bg-white)}
.text-center{text-align:center}

/* ========== 按钮 ========== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:var(--btn-radius);
  font-size:15px;font-weight:600;line-height:1.4;
  transition:all .28s cubic-bezier(.4,0,.2,1);
  border:2px solid transparent;
  white-space:nowrap;
}
.btn svg{width:18px;height:18px;flex-shrink:0}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);transform:translateY(-2px);box-shadow:0 10px 28px rgba(30,79,255,.3)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(30,79,255,.2)}
.btn-accent{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-accent:hover{background:#e86a00;border-color:#e86a00;transform:translateY(-2px);box-shadow:0 10px 28px rgba(255,122,26,.3)}
.btn-accent:active{transform:translateY(0);box-shadow:0 4px 12px rgba(255,122,26,.2)}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary-light);transform:translateY(-2px)}
.btn-outline-dark{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-outline-dark:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-2px)}
.btn-white{background:#fff;color:var(--primary-dark);border-color:#fff}
.btn-white:hover{background:#f0f4ff;transform:translateY(-2px);box-shadow:0 10px 28px rgba(0,0,0,.15)}
.btn-lg{padding:17px 40px;font-size:16px;border-radius:16px}
.btn-sm{padding:9px 20px;font-size:13px;border-radius:11px}
.btn-block{width:100%}

/* ========== 标签 / 徽章 ========== */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:100px;
  font-size:12px;font-weight:600;letter-spacing:.02em;
  background:var(--primary-light);color:var(--primary);
}
.badge-accent{background:var(--accent-light);color:var(--accent)}
.badge-success{background:var(--success-light);color:var(--success)}
.badge-white{background:rgba(255,255,255,.2);color:#fff;backdrop-filter:blur(8px)}
.section-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.06em;
  color:var(--primary);background:var(--primary-light);
  padding:6px 16px;border-radius:100px;margin-bottom:16px;
}
.section-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary)}

/* ========== 导航 ========== */
.site-header{
  position:sticky;top:0;z-index:1000;
  height:var(--header-h);
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .3s;
}
.site-header.scrolled{box-shadow:0 6px 24px rgba(15,23,42,.08)}
.header-inner{max-width:var(--container-w);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;gap:28px;width:100%}
.brand-logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-icon{
  width:40px;height:40px;border-radius:12px;
  background:linear-gradient(135deg,var(--primary),#6c5ce7);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:20px;font-weight:800;
  box-shadow:0 4px 14px rgba(30,79,255,.35);
}
.brand-text{font-size:18px;font-weight:800;letter-spacing:.01em;color:var(--text)}
.brand-text small{display:block;font-size:10px;font-weight:600;color:var(--text-muted);letter-spacing:.14em;line-height:1;margin-top:2px}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px;flex:1}
.nav-link{
  padding:9px 18px;border-radius:var(--btn-radius);
  font-size:14px;font-weight:600;color:var(--text-muted);
  transition:all .25s ease;position:relative;
  white-space:nowrap;
}
.nav-link:hover{color:var(--text);background:var(--bg)}
.nav-link.active{color:var(--primary);background:var(--primary-light)}
.nav-link.active::after{content:"";position:absolute;bottom:2px;left:50%;transform:translateX(-50%);width:16px;height:3px;border-radius:3px;background:var(--primary)}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.search-box{
  display:flex;align-items:center;gap:8px;
  background:var(--bg);border:1.5px solid var(--border);
  border-radius:12px;padding:0 14px;height:42px;
  transition:all .25s;width:200px;
}
.search-box:focus-within{border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px rgba(30,79,255,.1);width:240px}
.search-box svg{width:16px;height:16px;color:var(--text-muted);flex-shrink:0}
.search-box input{border:none;background:transparent;outline:none;font-size:13px;width:100%;color:var(--text)}
.search-box input::placeholder{color:var(--text-muted)}
.header-btn{flex-shrink:0}
.menu-toggle{display:none;flex-direction:column;gap:5px;padding:10px;border-radius:10px;flex-shrink:0}
.menu-toggle span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:all .3s}
.mobile-menu{
  display:none;position:fixed;top:0;left:0;right:0;bottom:0;z-index:1200;
  background:rgba(0,0,0,.5);backdrop-filter:blur(4px);
}
.mobile-menu.active{display:block}
.mobile-menu-panel{
  position:absolute;top:0;right:0;bottom:0;width:300px;max-width:85vw;
  background:#fff;box-shadow:-20px 0 60px rgba(0,0,0,.15);
  display:flex;flex-direction:column;padding:24px;gap:8px;
  transform:translateX(100%);transition:transform .35s cubic-bezier(.4,0,.2,1);
}
.mobile-menu.active .mobile-menu-panel{transform:translateX(0)}
.mobile-menu-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
.mobile-menu-close{width:36px;height:36px;border-radius:10px;background:var(--bg);display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--text)}
.mobile-nav-link{
  padding:14px 16px;border-radius:14px;font-size:15px;font-weight:600;
  color:var(--text);transition:all .25s;display:flex;align-items:center;justify-content:space-between;
}
.mobile-nav-link:hover{background:var(--bg)}
.mobile-nav-link.active{background:var(--primary-light);color:var(--primary)}
.mobile-nav-arrow{font-size:14px;color:var(--text-muted)}

/* ========== Hero ========== */
.hero{
  position:relative;
  background:linear-gradient(135deg,#0b1a3a 0%,#132448 50%,#0d1f3f 100%);
  overflow:hidden;
  min-height:620px;
  display:flex;align-items:center;
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.32;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse at 30% 40%,rgba(30,79,255,.18) 0%,transparent 60%),linear-gradient(90deg,rgba(11,26,58,.92) 0%,rgba(11,26,58,.78) 45%,rgba(11,26,58,.35) 100%);
}
.hero-inner{position:relative;z-index:2;padding:96px 24px;min-height:620px;display:flex;align-items:center;max-width:var(--container-w);margin:0 auto;width:100%}
.hero-content{max-width:620px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 18px;border-radius:100px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);
  color:#fff;font-size:13px;font-weight:600;letter-spacing:.04em;
  backdrop-filter:blur(10px);margin-bottom:24px;
}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:#34d399;box-shadow:0 0 0 4px rgba(52,211,153,.2)}
.hero h1{
  font-size:56px;line-height:1.12;font-weight:900;letter-spacing:-.02em;
  color:#fff;margin-bottom:20px;
}
.hero h1 .gradient-text{
  background:linear-gradient(135deg,#7dd3fc,#a5b4fc,#fca5a5);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.hero-desc{font-size:18px;line-height:1.7;color:rgba(255,255,255,.82);margin-bottom:32px;max-width:520px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:36px}
.hero-tags{display:flex;gap:12px;flex-wrap:wrap}
.hero-tags span{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;color:rgba(255,255,255,.75);
  background:rgba(255,255,255,.1);border-radius:8px;padding:6px 12px;
  backdrop-filter:blur(6px);
}
.hero-meta{
  position:absolute;right:24px;bottom:32px;z-index:2;
  display:flex;gap:36px;color:rgba(255,255,255,.7);font-size:13px;
}
.hero-meta strong{display:block;font-size:22px;font-weight:800;color:#fff;line-height:1.3}

/* ========== 核心特点 ========== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feature-card{
  background:var(--bg-white);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:36px 32px;
  transition:all .35s cubic-bezier(.4,0,.2,1);
  position:relative;overflow:hidden;
}
.feature-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  opacity:0;transition:opacity .3s;
}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.feature-card:hover::before{opacity:1}
.feature-icon{
  width:60px;height:60px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:22px;font-size:26px;
}
.feature-icon.blue{background:var(--primary-light);color:var(--primary)}
.feature-icon.green{background:var(--success-light);color:var(--success)}
.feature-icon.orange{background:var(--accent-light);color:var(--accent)}
.feature-card h3{font-size:19px;font-weight:750;margin-bottom:10px}
.feature-card p{color:var(--text-muted);font-size:14px;line-height:1.65}
.feature-card .feature-link{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:18px;font-size:13px;font-weight:600;color:var(--primary);
  transition:gap .25s;
}
.feature-card .feature-link:hover{gap:10px}

/* ========== 分类入口 ========== */
.category-section{background:var(--bg-white)}
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.category-card{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  height:360px;display:block;
  transition:all .35s cubic-bezier(.4,0,.2,1);
  box-shadow:var(--shadow-sm);
}
.category-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.category-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.category-card:hover img{transform:scale(1.05)}
.category-card-overlay{
  position:absolute;inset:0;z-index:2;
  background:linear-gradient(180deg,transparent 30%,rgba(8,15,35,.92) 100%);
  display:flex;flex-direction:column;justify-content:flex-end;
  padding:30px;color:#fff;
}
.category-card.blue-overlay .category-card-overlay{background:linear-gradient(180deg,transparent 30%,rgba(20,55,199,.9) 100%)}
.category-card.green-overlay .category-card-overlay{background:linear-gradient(180deg,transparent 30%,rgba(5,124,80,.9) 100%)}
.category-card.orange-overlay .category-card-overlay{background:linear-gradient(180deg,transparent 30%,rgba(185,88,0,.9) 100%)}
.category-tag{
  display:inline-flex;width:max-content;align-items:center;gap:6px;
  background:rgba(255,255,255,.18);backdrop-filter:blur(8px);
  border-radius:100px;padding:5px 12px;font-size:12px;font-weight:600;
  margin-bottom:14px;letter-spacing:.04em;
}
.category-card h3{font-size:24px;font-weight:800;margin-bottom:8px;letter-spacing:-.01em}
.category-card p{font-size:14px;line-height:1.6;opacity:.9;margin-bottom:16px}
.category-card .category-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:#fff;
  transition:gap .25s;
}
.category-card .category-link:hover{gap:14px}

/* ========== 资讯列表 ========== */
.news-section{background:var(--bg)}
.news-layout{display:grid;grid-template-columns:5fr 7fr;gap:28px;align-items:start}
.news-featured{
  background:#fff;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--border);box-shadow:var(--shadow-sm);
  transition:box-shadow .3s;
}
.news-featured:hover{box-shadow:var(--shadow-md)}
.news-featured img{width:100%;height:230px;object-fit:cover}
.news-f-body{padding:24px}
.news-f-title{font-size:20px;font-weight:750;line-height:1.4;margin:12px 0 10px}
.news-f-title a{transition:color .2s}
.news-f-title a:hover{color:var(--primary)}
.news-f-excerpt{font-size:14px;color:var(--text-muted);line-height:1.6;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-f-meta{display:flex;align-items:center;gap:14px;font-size:12px;color:var(--text-muted)}
.news-list{display:flex;flex-direction:column;gap:12px}
.news-item{
  display:flex;gap:20px;align-items:center;
  background:#fff;border:1px solid var(--border);
  border-radius:var(--radius);padding:20px 24px;
  transition:all .3s;
}
.news-item:hover{box-shadow:var(--shadow-md);transform:translateX(4px);border-color:var(--primary)}
.news-item-body{flex:1;min-width:0}
.news-item-title{font-size:15px;font-weight:650;line-height:1.45;margin:6px 0 8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.news-item-title a{transition:color .2s}
.news-item-title a:hover{color:var(--primary)}
.news-item-meta{display:flex;gap:10px;align-items:center;font-size:12px;color:var(--text-muted)}
.news-item-arrow{font-size:20px;color:var(--text-muted);transition:all .25s;flex-shrink:0}
.news-item:hover .news-item-arrow{color:var(--primary);transform:translateX(4px)}
.empty-tip{
  grid-column:1/-1;text-align:center;padding:80px 20px;
  color:var(--text-muted);font-size:16px;
  background:#fff;border-radius:var(--radius-lg);border:1px dashed var(--border);
}

/* ========== 数据统计 ========== */
.stats-section{
  background:linear-gradient(135deg,#0b1a3a 0%,#132448 100%);
  position:relative;overflow:hidden;
}
.stats-section::before{
  content:"";position:absolute;top:-200px;right:-200px;width:500px;height:500px;
  border-radius:50%;background:rgba(30,79,255,.15);filter:blur(80px);
}
.stats-section::after{
  content:"";position:absolute;bottom:-150px;left:-100px;width:400px;height:400px;
  border-radius:50%;background:rgba(255,122,26,.1);filter:blur(70px);
}
.stats-inner{position:relative;z-index:2}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:40px;text-align:center}
.stat-item{padding:10px}
.stat-number{
  font-size:46px;font-weight:900;color:#fff;letter-spacing:-.02em;
  line-height:1.1;margin-bottom:8px;
}
.stat-number .plus{color:var(--accent);font-size:30px}
.stat-label{font-size:14px;color:rgba(255,255,255,.65)}

/* ========== 流程 ========== */
.process-section{background:var(--bg-white)}
.process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;position:relative}
.process-step{
  text-align:center;padding:20px 10px;position:relative;
}
.process-num{
  width:68px;height:68px;border-radius:50%;
  background:var(--primary-light);color:var(--primary);
  font-size:24px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 20px;position:relative;z-index:2;
  box-shadow:0 0 0 6px#fff,0 0 0 7px var(--border);
}
.process-step:nth-child(2) .process-num{background:var(--accent-light);color:var(--accent)}
.process-step:nth-child(3) .process-num{background:var(--success-light);color:var(--success)}
.process-step:nth-child(4) .process-num{background:#f0e9ff;color:#7c3aed}
.process-step::before{
  content:"";position:absolute;top:44px;left:calc(50% + 50px);right:calc(-50% + 50px);
  height:2px;background:var(--border);z-index:1;
}
.process-step:last-child::before{display:none}
.process-step h3{font-size:17px;font-weight:700;margin-bottom:8px}
.process-step p{font-size:14px;color:var(--text-muted);line-height:1.6;max-width:180px;margin:0 auto}

/* ========== FAQ ========== */
.faq-section{background:var(--bg)}
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--border);
  border-radius:var(--radius);margin-bottom:14px;
  transition:all .3s;overflow:hidden;
}
.faq-item:hover{border-color:var(--primary)}
.faq-item.active{box-shadow:var(--shadow-md);border-color:var(--primary)}
.faq-question{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:22px 26px;text-align:left;font-size:16px;font-weight:650;
  color:var(--text);transition:color .2s;
}
.faq-question:hover{color:var(--primary)}
.faq-icon{
  flex-shrink:0;width:28px;height:28px;border-radius:8px;
  background:var(--bg);display:flex;align-items:center;justify-content:center;
  font-size:16px;transition:all .35s;
}
.faq-item.active .faq-icon{background:var(--primary);color:#fff;transform:rotate(45deg)}
.faq-answer{
  max-height:0;overflow:hidden;transition:max-height .4s ease;
  padding:0 26px;line-height:1.7;font-size:14px;color:var(--text-muted);
}
.faq-item.active .faq-answer{max-height:300px;padding:0 26px 22px}

/* ========== CTA ========== */
.cta-section{
  position:relative;overflow:hidden;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.cta-section::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(11,26,58,.95) 30%,rgba(30,79,255,.75) 100%);
}
.cta-inner{position:relative;z-index:2;text-align:center;padding:110px 24px;max-width:720px;margin:0 auto}
.cta-inner h2{font-size:40px;font-weight:900;color:#fff;margin-bottom:16px;letter-spacing:-.02em}
.cta-inner p{font-size:17px;color:rgba(255,255,255,.8);margin-bottom:36px;line-height:1.7}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ========== 页脚 ========== */
.site-footer{background:var(--bg-dark);color:rgba(255,255,255,.7);padding:70px 0 0;overflow:hidden}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:44px;padding-bottom:50px}
.footer-brand .brand-text{color:#fff;font-size:20px;margin-bottom:14px}
.footer-brand p{font-size:14px;line-height:1.7;max-width:300px;margin-top:10px}
.footer-logo-icon{
  width:44px;height:44px;border-radius:13px;
  background:linear-gradient(135deg,var(--primary),#6c5ce7);
  display:flex;align-items:center;justify-content:center;
  font-size:22px;color:#fff;margin-bottom:12px;
  box-shadow:0 6px 20px rgba(30,79,255,.4);
}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:18px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:14px;color:rgba(255,255,255,.6);transition:all .25s;display:inline-block}
.footer-col ul a:hover{color:#fff;transform:translateX(3px)}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;font-size:14px;line-height:1.6;color:rgba(255,255,255,.6)}
.footer-contact svg{width:16px;height:16px;flex-shrink:0;margin-top:3px;color:var(--primary)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:24px 0;text-align:center;font-size:13px;color:rgba(255,255,255,.4);
}
.footer-bottom a{color:rgba(255,255,255,.5);transition:color .25s}
.footer-bottom a:hover{color:#fff}

/* ========== 响应式 ========== */
@media(max-width:1024px){
  .main-nav{display:none}
  .header-actions .search-box{display:none}
  .menu-toggle{display:flex}
  .hero h1{font-size:46px}
  .features-grid{grid-template-columns:repeat(3,1fr);gap:20px}
  .category-grid{grid-template-columns:repeat(3,1fr);gap:20px}
  .stats-number{font-size:36px}
  .process-grid{grid-template-columns:repeat(4,1fr);gap:16px}
  .news-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .section{padding:70px 0}
  .hero{min-height:540px}
  .hero-inner{padding:70px 24px;min-height:540px}
  .hero h1{font-size:40px}
  .hero-desc{font-size:16px}
  .features-grid{grid-template-columns:1fr 1fr}
  .category-grid{grid-template-columns:1fr}
  .category-card{height:300px}
  .stats-grid{grid-template-columns:1fr 1fr;gap:30px}
  .process-grid{grid-template-columns:1fr 1fr;gap:20px}
  .process-step::before{display:none}
  .cta-inner h2{font-size:32px}
  .cta-inner{padding:80px 24px}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .news-item{flex-direction:column;align-items:flex-start;gap:10px}
  .news-item-arrow{display:none}
}
@media(max-width:520px){
  .container{padding:0 16px}
  .header-inner{padding:0 16px;gap:12px}
  .brand-text{font-size:16px}
  .brand-text small{display:none}
  .hero h1{font-size:34px;line-height:1.2}
  .hero-desc{font-size:15px}
  .hero-actions .btn{width:100%;justify-content:center}
  .hero-tags{flex-direction:column;gap:8px}
  .hero-meta{display:none}
  .features-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr;gap:20px}
  .stat-number{font-size:30px}
  .process-grid{grid-template-columns:1fr}
  .category-card{height:260px}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
  .faq-question{font-size:15px;padding:18px 18px;flex-wrap:wrap}
  .faq-answer{padding:0 18px}
  .faq-item.active .faq-answer{padding:0 18px 18px}
  .news-f-body{padding:18px}
  .news-f-title{font-size:18px}
  .search-box{display:none}
  .header-btn.btn-header{display:none}
}

/* roulang page: category1 */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --bg-body: #f8fafc;
  --bg-white: #ffffff;
  --bg-soft: #f1f5f9;
  --bg-dark: #0f172a;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
  --shadow-md: 0 8px 24px rgba(0,0,0,.08);
  --shadow-lg: 0 16px 40px rgba(0,0,0,.10);
  --space-section: 96px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color .2s ease;
}

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: #fff;
  box-shadow: 0 4px 12px rgba(37,99,235,.3);
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: .2px;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: center;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
  transition: all .2s ease;
}

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

.nav-link.active {
  color: var(--primary-dark);
  background: var(--primary-light);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-search {
  position: relative;
}

.nav-search input {
  width: 200px;
  padding: 9px 16px 9px 38px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 14px;
  background: var(--bg-soft);
  outline: none;
  transition: all .25s ease;
  font-family: inherit;
}

.nav-search input:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
  width: 240px;
}

.nav-search i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 14px;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(37,99,235,.25);
  transition: all .25s ease;
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(37,99,235,.35);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
  color: var(--text-main);
  font-size: 20px;
  align-items: center;
  justify-content: center;
}

/* ===== Page Banner ===== */
.page-banner {
  position: relative;
  padding: 80px 0 100px;
  background: linear-gradient(135deg, rgba(15,23,42,.88) 0%, rgba(30,64,175,.82) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: #fff;
}

.banner-content {
  max-width: 760px;
}

.banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.25);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 20px;
  backdrop-filter: blur(4px);
}

.banner-content h1 {
  font-size: 44px;
  line-height: 1.25;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -.5px;
}

.banner-content h1 span {
  color: #fbbf24;
}

.banner-content p {
  font-size: 17px;
  color: rgba(255,255,255,.85);
  margin-bottom: 28px;
  max-width: 600px;
  line-height: 1.8;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,.7);
  margin-bottom: 18px;
}

.breadcrumb a {
  color: rgba(255,255,255,.85);
}

.breadcrumb a:hover {
  color: #fbbf24;
}

.breadcrumb i {
  font-size: 11px;
  opacity: .6;
}

.banner-stats {
  display: flex;
  gap: 40px;
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,.15);
}

.stat-item h3 {
  font-size: 28px;
  font-weight: 800;
  color: #fbbf24;
  line-height: 1.2;
}

.stat-item p {
  font-size: 13px;
  color: rgba(255,255,255,.7);
  margin: 4px 0 0;
}

/* ===== Section Common ===== */
.section {
  padding: var(--space-section) 0;
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-head .tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 12px;
  letter-spacing: -.3px;
}

.section-head p {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.7;
}

/* ===== Guide Steps ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  position: relative;
  transition: all .3s ease;
}

.step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(37,99,235,.3);
}

.step-num {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 48px;
  font-weight: 800;
  color: var(--bg-soft);
  line-height: 1;
  transition: color .3s ease;
}

.step-card:hover .step-num {
  color: var(--primary-light);
}

.step-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary-light), #fff);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 20px;
}

.step-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}

.step-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* ===== Login Methods ===== */
.methods-section {
  background: var(--bg-white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.methods-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.method-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  text-align: center;
  transition: all .3s ease;
  background: var(--bg-white);
}

.method-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.method-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  background: var(--bg-soft);
  color: var(--primary);
  transition: all .3s ease;
}

.method-card:hover .method-icon {
  background: var(--primary);
  color: #fff;
  transform: scale(1.05);
}

.method-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
}

.method-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.method-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 600;
}

/* ===== Video Cover Block ===== */
.video-block {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 60px;
  align-items: center;
}

.video-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.video-media img {
  width: 100%;
  height: 380px;
  object-fit: cover;
}

.video-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15,23,42,0) 40%, rgba(15,23,42,.4));
}

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(255,255,255,.9);
  color: var(--primary);
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  box-shadow: 0 8px 30px rgba(0,0,0,.25);
  transition: all .3s ease;
  border: none;
}

.play-btn:hover {
  background: var(--primary);
  color: #fff;
  transform: translate(-50%, -50%) scale(1.08);
}

.video-block h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.video-block h2 span {
  color: var(--primary);
}

.video-block p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}

.video-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 20px 0 28px;
}

.video-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
}

.video-features i {
  color: var(--primary);
  background: var(--primary-light);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
}

/* ===== Notice Cards ===== */
.notice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.notice-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all .3s ease;
}

.notice-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.notice-img {
  height: 190px;
  overflow: hidden;
}

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

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

.notice-body {
  padding: 24px;
}

.notice-body .date {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 10px;
}

.notice-body h3 {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 8px;
}

.notice-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.notice-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

.notice-link:hover {
  color: var(--primary-dark);
}

.notice-link i {
  margin-left: 4px;
  font-size: 12px;
  transition: transform .2s ease;
}

.notice-link:hover i {
  transform: translateX(4px);
}

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

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow .25s ease;
}

.faq-item:hover {
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  transition: color .2s ease;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-question i {
  font-size: 14px;
  color: var(--text-muted);
  transition: all .3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .3s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--bg-dark) 0%, #1e3a8a 100%);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(37,99,235,.3);
  filter: blur(80px);
  top: -100px;
  right: -100px;
}

.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}

.cta-inner p {
  color: rgba(255,255,255,.75);
  font-size: 16px;
  margin-bottom: 30px;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: all .25s ease;
  border: none;
}

.btn-primary {
  background: #fbbf24;
  color: #1e293b;
  box-shadow: 0 6px 20px rgba(251,191,36,.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(251,191,36,.45);
}

.btn-ghost {
  background: rgba(255,255,255,.12);
  color: #fff;
  border: 1px solid rgba(255,255,255,.2);
  backdrop-filter: blur(4px);
}

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

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-dark);
  color: #94a3b8;
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr .8fr .9fr 1.1fr;
  gap: 48px;
  padding-bottom: 56px;
}

.footer-brand .footer-logo-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #fff;
  margin-bottom: 14px;
}

.footer-brand .brand-text {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.8;
  max-width: 300px;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col a {
  font-size: 14px;
  color: #94a3b8;
  transition: color .2s ease;
}

.footer-col a:hover {
  color: #fbbf24;
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  margin-bottom: 14px;
  color: #94a3b8;
}

.footer-contact svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--primary);
}

.footer-bottom {
  text-align: center;
  padding: 24px 0;
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: 13px;
  color: #64748b;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root {
    --space-section: 72px;
  }

  .main-nav {
    gap: 4px;
  }

  .nav-link {
    padding: 8px 12px;
    font-size: 14px;
  }

  .nav-search input {
    width: 160px;
  }

  .nav-search input:focus {
    width: 190px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 34px;
  }
}

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

  .header-inner {
    height: 62px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 62px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px;
    gap: 4px;
    box-shadow: 0 20px 40px rgba(0,0,0,.12);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
  }

  .main-nav.open {
    display: flex;
  }

  .nav-link {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }

  .nav-search {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .banner-content h1 {
    font-size: 32px;
  }

  .banner-stats {
    flex-wrap: wrap;
    gap: 20px;
  }

  .methods-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

  .video-media img {
    height: 280px;
  }

  .notice-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 40px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .logo-text {
    font-size: 16px;
  }

  .nav-cta {
    display: none;
  }

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

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

  .cta-inner h2 {
    font-size: 28px;
  }

  .video-features {
    grid-template-columns: 1fr;
  }

  .banner-content h1 {
    font-size: 26px;
  }
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root {
  --primary: #FF6B35;
  --primary-light: #FF8E66;
  --primary-dark: #E8532A;
  --primary-bg: #FFF1EB;
  --secondary: #1B2A4A;
  --secondary-light: #2A3D66;
  --accent: #00C9A7;
  --accent-bg: #E6FAF5;
  --bg-light: #F5F7FA;
  --bg-white: #FFFFFF;
  --text-dark: #1E2A3B;
  --text-body: #4A5A6A;
  --text-light: #7A8A9A;
  --text-white: #FFFFFF;
  --border: #E8ECF1;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(30, 42, 59, 0.06);
  --shadow-md: 0 8px 24px rgba(30, 42, 59, 0.08);
  --shadow-lg: 0 16px 40px rgba(30, 42, 59, 0.12);
  --transition: all 0.3s ease;
  --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* ===== 基础重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-family); font-size: 16px; line-height: 1.7; color: var(--text-body); background: var(--bg-white); }
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; display: block; height: auto; }
button, input, select { font-family: inherit; font-size: inherit; outline: none; border: none; background: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5 { color: var(--text-dark); line-height: 1.3; font-weight: 700; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }

/* ===== Header / 导航 ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-container { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: var(--text-dark); letter-spacing: -0.5px; white-space: nowrap; }
.brand-icon { font-size: 24px; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav .nav-link { position: relative; padding: 10px 18px; font-size: 15px; font-weight: 500; color: var(--text-body); border-radius: var(--radius-sm); }
.main-nav .nav-link:hover { color: var(--primary); background: var(--primary-bg); }
.main-nav .nav-link.active { color: var(--primary); background: var(--primary-bg); font-weight: 600; }
.main-nav .nav-link.active::after { content: ''; position: absolute; left: 18px; right: 18px; bottom: 2px; height: 3px; border-radius: 4px; background: var(--primary); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-search { display: flex; align-items: center; gap: 8px; background: var(--bg-light); border: 1px solid var(--border); border-radius: 30px; padding: 8px 16px; width: 220px; transition: var(--transition); }
.nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(255,107,53,0.12); background: var(--bg-white); }
.nav-search svg { width: 16px; height: 16px; color: var(--text-light); flex-shrink: 0; }
.nav-search input { width: 100%; background: transparent; font-size: 14px; color: var(--text-dark); }
.nav-search input::placeholder { color: var(--text-light); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: 30px; font-size: 15px; font-weight: 600; cursor: pointer; transition: var(--transition); border: 2px solid transparent; line-height: 1.4; }
.btn-primary { background: var(--primary); color: var(--text-white); box-shadow: 0 4px 16px rgba(255,107,53,0.3); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,107,53,0.4); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(255,107,53,0.3); }
.btn-outline { border-color: var(--border); color: var(--text-dark); background: var(--bg-white); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-bg); }
.btn-outline-light { border-color: rgba(255,255,255,0.6); color: var(--text-white); }
.btn-outline-light:hover { background: rgba(255,255,255,0.15); border-color: var(--text-white); }
.btn-sm { padding: 8px 20px; font-size: 14px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; }
.nav-toggle span { width: 22px; height: 2px; background: var(--text-dark); border-radius: 2px; transition: var(--transition); }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.hero { position: relative; background-image: url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center; padding: 130px 0 110px; overflow: hidden; }
.hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(27,42,74,0.92) 0%, rgba(27,42,74,0.78) 45%, rgba(27,42,74,0.45) 100%); z-index: 1; }
.hero .container { position: relative; z-index: 2; }
.hero-content { max-width: 680px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.25); color: #fff; font-size: 13px; font-weight: 500; padding: 6px 16px; border-radius: 30px; margin-bottom: 24px; backdrop-filter: blur(4px); }
.hero-badge span { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); display: inline-block; }
.hero h1 { font-size: 46px; line-height: 1.2; color: #fff; font-weight: 800; margin-bottom: 20px; letter-spacing: -1px; }
.hero h1 span { color: var(--primary-light); }
.hero p { font-size: 18px; color: rgba(255,255,255,0.85); line-height: 1.8; margin-bottom: 36px; max-width: 560px; }
.hero-btns { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 48px; }
.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; }
.hero-stats .stat { display: flex; flex-direction: column; gap: 4px; }
.hero-stats .stat-num { font-size: 32px; font-weight: 800; color: #fff; line-height: 1; }
.hero-stats .stat-label { font-size: 14px; color: rgba(255,255,255,0.7); }
.hero-stats .stat-num small { font-size: 16px; font-weight: 600; color: var(--primary-light); }
.hero-art { position: absolute; right: 60px; top: 50%; transform: translateY(-50%); width: 420px; z-index: 2; background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.25); border-radius: var(--radius-lg); padding: 28px; backdrop-filter: blur(8px); display: none; }
.hero-art h4 { color: #fff; font-size: 18px; margin-bottom: 16px; }
.hero-art ul { display: flex; flex-direction: column; gap: 12px; }
.hero-art li { display: flex; align-items: center; gap: 10px; color: rgba(255,255,255,0.9); font-size: 14px; }
.hero-art li span { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

/* ===== 板块标题 ===== */
.section-header { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.section-header .section-tag { display: inline-block; font-size: 13px; font-weight: 600; color: var(--primary); background: var(--primary-bg); padding: 6px 16px; border-radius: 30px; margin-bottom: 16px; letter-spacing: 0.5px; }
.section-header h2 { font-size: 34px; margin-bottom: 14px; letter-spacing: -0.5px; }
.section-header p { font-size: 16px; color: var(--text-light); line-height: 1.8; }
.section-header.left { text-align: left; margin-left: 0; margin-right: 0; }

/* ===== 功能卡片 ===== */
.features-section { background: var(--bg-light); }
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card { background: var(--bg-white); border-radius: var(--radius-lg); padding: 36px 28px; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition); display: flex; flex-direction: column; }
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.feature-icon { width: 64px; height: 64px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; font-size: 28px; margin-bottom: 20px; background: var(--primary-bg); }
.feature-card:nth-child(2) .feature-icon { background: var(--accent-bg); }
.feature-card:nth-child(3) .feature-icon { background: var(--bg-light); }
.feature-card:nth-child(4) .feature-icon { background: var(--primary-bg); }
.feature-card h3 { font-size: 18px; margin-bottom: 10px; }
.feature-card p { font-size: 14px; line-height: 1.7; color: var(--text-light); flex: 1; margin-bottom: 16px; }
.feature-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.feature-link:hover { gap: 10px; }
.feature-link svg { width: 14px; height: 14px; }

/* ===== 图文详情 ===== */
.detail-section { background: var(--bg-white); }
.detail-block { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; padding: 32px 0; }
.detail-block + .detail-block { border-top: 1px solid var(--border); margin-top: 32px; }
.detail-block.reverse .detail-img { order: 2; }
.detail-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); position: relative; }
.detail-img img { width: 100%; height: 400px; object-fit: cover; transition: transform 0.6s ease; }
.detail-img:hover img { transform: scale(1.03); }
.detail-content h3 { font-size: 26px; margin-bottom: 16px; letter-spacing: -0.3px; }
.detail-content p { font-size: 15px; line-height: 1.9; color: var(--text-body); margin-bottom: 20px; }
.detail-list { display: flex; flex-direction: column; gap: 12px; }
.detail-list li { display: flex; align-items: flex-start; gap: 12px; font-size: 14px; color: var(--text-body); }
.detail-list li svg { width: 20px; height: 20px; color: var(--accent); flex-shrink: 0; margin-top: 2px; }
.detail-list li strong { color: var(--text-dark); }

/* ===== 数据统计 ===== */
.stats-section { background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%); position: relative; overflow: hidden; }
.stats-section::before { content: ''; position: absolute; width: 300px; height: 300px; border-radius: 50%; background: rgba(255,107,53,0.16); top: -150px; right: -120px; }
.stats-section::after { content: ''; position: absolute; width: 200px; height: 200px; border-radius: 50%; background: rgba(0,201,167,0.12); bottom: -80px; left: -60px; }
.stats-section .container { position: relative; z-index: 2; }
.stats-section .section-header h2 { color: #fff; }
.stats-section .section-header p { color: rgba(255,255,255,0.7); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.stat-item { text-align: center; padding: 40px 24px; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius-lg); transition: var(--transition); }
.stat-item:hover { background: rgba(255,255,255,0.12); transform: translateY(-4px); }
.stat-item .num { font-size: 44px; font-weight: 800; color: #fff; line-height: 1.1; margin-bottom: 8px; display: flex; align-items: baseline; justify-content: center; gap: 4px; }
.stat-item .num small { font-size: 20px; color: var(--primary-light); font-weight: 600; }
.stat-item .label { font-size: 14px; color: rgba(255,255,255,0.7); }

/* ===== 流程 ===== */
.process-section { background: var(--bg-light); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; position: relative; }
.process-step { text-align: center; padding: 32px 20px; position: relative; }
.process-step .step-num { width: 48px; height: 48px; margin: 0 auto 20px; border-radius: 50%; background: var(--primary); color: #fff; font-size: 18px; font-weight: 700; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 16px rgba(255,107,53,0.3); position: relative; z-index: 2; }
.process-step:nth-child(2) .step-num { background: var(--accent); box-shadow: 0 4px 16px rgba(0,201,167,0.3); }
.process-step:nth-child(3) .step-num { background: var(--secondary); box-shadow: 0 4px 16px rgba(27,42,74,0.3); }
.process-step:nth-child(4) .step-num { background: var(--primary-light); box-shadow: 0 4px 16px rgba(255,107,53,0.3); }
.process-step h3 { font-size: 17px; margin-bottom: 8px; }
.process-step p { font-size: 14px; color: var(--text-light); line-height: 1.7; }
.process-line { position: absolute; top: 56px; left: 20%; right: 20%; height: 2px; background: var(--border); z-index: 1; }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-white); }
.faq-wrap { max-width: 800px; margin: 0 auto; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-md); margin-bottom: 16px; background: var(--bg-white); transition: var(--transition); overflow: hidden; }
.faq-item:hover { border-color: var(--primary); box-shadow: var(--shadow-sm); }
.faq-item.active { border-color: var(--primary); box-shadow: var(--shadow-md); }
.faq-question { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 24px; cursor: pointer; font-size: 16px; font-weight: 600; color: var(--text-dark); }
.faq-question .faq-toggle { width: 28px; height: 28px; border-radius: 50%; background: var(--bg-light); display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: var(--transition); }
.faq-item.active .faq-toggle { background: var(--primary); transform: rotate(45deg); }
.faq-item.active .faq-toggle svg { color: #fff; }
.faq-toggle svg { width: 14px; height: 14px; color: var(--text-light); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-answer p { padding: 0 24px 20px; font-size: 15px; line-height: 1.8; color: var(--text-light); }

/* ===== CTA ===== */
.cta-section { background: linear-gradient(120deg, var(--primary) 0%, var(--primary-light) 100%); padding: 80px 0; position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; width: 200px; height: 200px; border-radius: 50%; background: rgba(255,255,255,0.15); top: -80px; right: -60px; }
.cta-section::after { content: ''; position: absolute; width: 160px; height: 160px; border-radius: 50%; background: rgba(255,255,255,0.1); bottom: -60px; left: -40px; }
.cta-content { text-align: center; position: relative; z-index: 2; }
.cta-content h2 { font-size: 34px; color: #fff; margin-bottom: 16px; }
.cta-content p { font-size: 16px; color: rgba(255,255,255,0.9); max-width: 620px; margin: 0 auto 32px; line-height: 1.8; }
.cta-btns { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-btns .btn-white { background: #fff; color: var(--primary); box-shadow: 0 4px 16px rgba(0,0,0,0.15); }
.cta-btns .btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }
.cta-btns .btn-ghost { border: 2px solid rgba(255,255,255,0.6); color: #fff; }
.cta-btns .btn-ghost:hover { background: rgba(255,255,255,0.15); border-color: #fff; }

/* ===== 页脚 ===== */
.site-footer { background: var(--secondary); color: rgba(255,255,255,0.7); padding: 72px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 48px; padding-bottom: 48px; }
.footer-brand .brand-text { font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 4px; }
.footer-brand p { font-size: 14px; line-height: 1.8; margin-top: 12px; color: rgba(255,255,255,0.6); max-width: 320px; }
.footer-logo-icon { font-size: 32px; margin-bottom: 12px; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 20px; font-weight: 600; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { font-size: 14px; color: rgba(255,255,255,0.65); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-contact li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: rgba(255,255,255,0.65); }
.footer-contact svg { width: 18px; height: 18px; color: var(--primary-light); flex-shrink: 0; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 24px 0; text-align: center; font-size: 14px; color: rgba(255,255,255,0.5); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .nav-search { width: 160px; }
  .hero { padding: 100px 0 80px; }
  .hero h1 { font-size: 38px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .detail-block { gap: 32px; }
  .detail-img img { height: 300px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav-container { height: 64px; }
  .nav-toggle { display: flex; }
  .main-nav { position: fixed; top: 64px; left: 0; right: 0; background: var(--bg-white); flex-direction: column; align-items: stretch; padding: 16px 24px; box-shadow: var(--shadow-lg); border-bottom: 1px solid var(--border); transform: translateY(-120%); opacity: 0; pointer-events: none; transition: var(--transition); z-index: 99; gap: 6px; }
  .main-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .main-nav .nav-link { padding: 12px 16px; font-size: 16px; }
  .main-nav .nav-link.active::after { display: none; }
  .nav-search { display: none; }
  .hero { padding: 80px 0 64px; }
  .hero h1 { font-size: 32px; }
  .hero p { font-size: 16px; }
  .hero-btns .btn { padding: 10px 20px; font-size: 14px; }
  .hero-stats { gap: 24px; }
  .hero-stats .stat-num { font-size: 26px; }
  .detail-block { grid-template-columns: 1fr; gap: 24px; }
  .detail-block.reverse .detail-img { order: 0; }
  .detail-img img { height: 240px; }
  .process-line { display: none; }
  .cta-content h2 { font-size: 28px; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .features-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .stats-section .section-header h2 { font-size: 26px; }
  .process-grid { grid-template-columns: 1fr; gap: 0; }
  .process-step { padding: 24px 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .section-header h2 { font-size: 26px; }
  .hero h1 { font-size: 26px; }
  .hero p { font-size: 15px; }
  .hero-btns { flex-direction: column; align-items: stretch; }
  .hero-btns .btn { width: 100%; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .detail-content h3 { font-size: 22px; }
  .detail-block { padding: 20px 0; }
  .cta-content h2 { font-size: 24px; }
  .cta-btns { flex-direction: column; align-items: stretch; }
  .cta-btns .btn { width: 100%; }
}

/* roulang page: article */
/* ========== 设计变量 ========== */
:root {
  --primary: #10b981;
  --primary-dark: #059669;
  --primary-light: #d1fae5;
  --secondary: #0ea5e9;
  --secondary-light: #e0f2fe;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --text-body: #334155;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.04);
  --shadow: 0 6px 28px rgba(15, 23, 42, 0.06);
  --shadow-hover: 0 12px 36px rgba(15, 23, 42, 0.12);
  --nav-h: 76px;
  --container: 1160px;
  --transition: 0.25s ease;
}

/* ========== Reset / Base ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text-body);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text);
  line-height: 1.3;
  font-weight: 700;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: 48px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  padding: 6px 14px;
  border-radius: 999px;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: 36px;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-head p {
  font-size: 17px;
  color: var(--text-weak);
  line-height: 1.8;
}

.text-link {
  color: var(--primary);
  font-weight: 600;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.text-link:hover {
  color: var(--primary-dark);
}

.empty-text {
  text-align: center;
  padding: 40px;
  color: var(--text-weak);
  background: var(--card);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.4;
  transition: all var(--transition);
  white-space: nowrap;
  border: 1.5px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.28);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(16, 185, 129, 0.34);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline-light {
  border-color: rgba(255, 255, 255, 0.8);
  color: #fff;
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
}

.btn-light {
  background: #fff;
  color: var(--primary-dark);
}

.btn-light:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.12);
}

.btn-sm {
  padding: 9px 20px;
  font-size: 14px;
}

.btn:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* ========== 徽章 / 标签 ========== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary-dark);
  letter-spacing: 0.3px;
}

.badge-light {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(6px);
}

.tag {
  display: inline-block;
  padding: 6px 16px;
  background: #f1f5f9;
  color: var(--text-weak);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition);
}

.tag:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
}

/* ========== Header / 导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
  box-shadow: 0 1px 10px rgba(15, 23, 42, 0.03);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: var(--nav-h);
}

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

.logo-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 12px;
  color: #fff;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.logo-icon svg {
  width: 22px;
  height: 22px;
}

.logo-text {
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.3px;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0 auto;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-weak);
  transition: all var(--transition);
  white-space: nowrap;
}

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

.nav-link.active {
  color: var(--primary-dark);
  background: var(--primary-light);
  font-weight: 700;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #f1f5f9;
  border: 1.5px solid transparent;
  border-radius: 999px;
  padding: 8px 14px;
  min-width: 220px;
  transition: all var(--transition);
}

.search-box:hover,
.search-box:focus-within {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.12);
}

.search-box svg {
  width: 16px;
  height: 16px;
  color: var(--text-weak);
  flex-shrink: 0;
}

.search-box input {
  flex: 1;
  font-size: 14px;
  color: var(--text);
  background: transparent;
  min-width: 0;
}

.search-box input::placeholder {
  color: #94a3b8;
}

.search-kbd {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-weak);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 7px;
  white-space: nowrap;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: transparent;
  border: 1px solid var(--border);
  align-items: center;
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

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

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

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

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px 24px;
  box-shadow: var(--shadow);
  z-index: 99;
  flex-direction: column;
  gap: 4px;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu .nav-link {
  padding: 14px 16px;
  font-size: 16px;
  border-radius: 12px;
}

.mobile-cta {
  margin-top: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ========== 文章 Hero ========== */
.article-hero {
  position: relative;
  padding: 78px 0 108px;
  background-size: cover;
  background-position: center;
}

.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.86) 0%, rgba(16, 185, 129, 0.74) 100%);
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
}

.breadcrumb a:hover {
  color: #fff;
  text-decoration: underline;
}

.breadcrumb .sep {
  color: rgba(255, 255, 255, 0.4);
}

.article-hero h1 {
  color: #fff;
  font-size: 42px;
  letter-spacing: -0.8px;
  line-height: 1.25;
  max-width: 860px;
  margin: 18px 0 20px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.16);
}

.hero-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
}

.hero-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.hero-meta svg {
  width: 15px;
  height: 15px;
}

/* ========== 文章主体 ========== */
.article-layout {
  position: relative;
  z-index: 3;
  margin-top: -56px;
  padding-bottom: 80px;
}

.article-card {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 52px 60px;
  border: 1px solid rgba(226, 232, 240, 0.6);
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.article-body {
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--text-body);
}

.article-body h2 {
  font-size: 26px;
  margin: 38px 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-light);
}

.article-body h3 {
  font-size: 21px;
  margin: 30px 0 12px;
}

.article-body p {
  margin-bottom: 18px;
}

.article-body a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body a:hover {
  color: var(--primary-dark);
}

.article-body ul,
.article-body ol {
  margin: 18px 0 22px;
  padding-left: 24px;
}

.article-body ul li {
  list-style: disc;
  margin-bottom: 8px;
  padding-left: 4px;
}

.article-body ol li {
  list-style: decimal;
  margin-bottom: 8px;
  padding-left: 4px;
}

.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  padding: 18px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
  color: var(--text);
  font-style: normal;
}

.article-body img {
  width: auto;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: 24px 0;
  box-shadow: var(--shadow-sm);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 15px;
}

.article-body th,
.article-body td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}

.article-body th {
  background: #f8fafc;
  font-weight: 700;
}

.not-found {
  text-align: center;
  padding: 60px 20px;
}

.not-found .not-found-icon {
  font-size: 56px;
  margin-bottom: 16px;
}

.not-found h2 {
  font-size: 28px;
  margin-bottom: 12px;
}

.not-found p {
  color: var(--text-weak);
  margin-bottom: 28px;
}

/* ========== 相关推荐 ========== */
.related-section {
  background: #fff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.post-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.post-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

.post-thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #e2e8f0;
}

.post-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

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

.post-card-body {
  padding: 22px 24px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.post-card-body .badge {
  align-self: flex-start;
}

.post-card-body h3 {
  font-size: 17px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition);
}

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

.post-card-body p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.post-date {
  font-size: 13px;
  color: var(--text-weak);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ========== FAQ ========== */
.faq-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 52px;
  align-items: center;
}

.faq-list {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0 20px;
  transition: all var(--transition);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
  font-weight: 600;
  font-size: 15.5px;
  color: var(--text);
  user-select: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "";
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--text-weak);
  border-bottom: 2px solid var(--text-weak);
  transform: rotate(45deg);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-right: 6px;
}

.faq-item[open] summary::after {
  transform: rotate(-135deg);
  margin-top: -6px;
}

.faq-item .faq-answer {
  padding: 0 0 18px;
  font-size: 14.5px;
  color: var(--text-weak);
  line-height: 1.8;
}

.faq-item .faq-answer p {
  margin-bottom: 8px;
}

.faq-item .faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-visual img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 5;
}

/* ========== CTA ========== */
.cta-section {
  padding: 80px 0;
}

.cta-inner {
  position: relative;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 28px;
  padding: 64px 56px;
  text-align: center;
  color: #fff;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(16, 185, 129, 0.3);
}

.cta-inner::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 360px;
  height: 360px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}

.cta-inner::after {
  content: "";
  position: absolute;
  bottom: -60%;
  left: -5%;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 50%;
}

.cta-inner > * {
  position: relative;
  z-index: 2;
}

.cta-inner h2 {
  color: #fff;
  font-size: 34px;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.cta-inner p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 30px;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

/* ========== 页脚 ========== */
.site-footer {
  background: #0b1220;
  color: #94a3b8;
  margin-top: auto;
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.7fr 0.9fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-logo-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 14px;
  font-size: 22px;
  box-shadow: 0 6px 18px rgba(16, 185, 129, 0.3);
}

.brand-text {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.3px;
}

.footer-brand p {
  font-size: 14.5px;
  line-height: 1.8;
  max-width: 340px;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 22px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul a {
  color: #94a3b8;
  font-size: 14.5px;
  transition: all var(--transition);
}

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

.footer-contact {
  gap: 14px;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
}

.footer-contact svg {
  width: 18px;
  height: 18px;
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-bottom {
  padding: 22px 0 28px;
  text-align: center;
  font-size: 13.5px;
  color: #64748b;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .main-nav {
    display: none;
  }

  .header-actions .search-box {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .header-actions {
    margin-left: auto;
  }

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

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

  .faq-visual img {
    max-width: 460px;
    margin: 0 auto;
  }

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

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .section-head h2 {
    font-size: 28px;
  }

  .article-hero {
    padding: 60px 0 90px;
  }

  .article-hero h1 {
    font-size: 28px;
  }

  .article-layout {
    margin-top: -44px;
    padding-bottom: 60px;
  }

  .article-card {
    padding: 32px 26px;
    border-radius: 16px;
  }

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

  .cta-inner {
    padding: 48px 28px;
  }

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

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

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .logo-text {
    font-size: 16px;
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .logo-icon {
    width: 34px;
    height: 34px;
    border-radius: 10px;
  }

  .logo-icon svg {
    width: 18px;
    height: 18px;
  }

  .header-actions .btn {
    padding: 9px 14px;
    font-size: 13px;
  }

  .article-hero h1 {
    font-size: 23px;
  }

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

  .article-body h2 {
    font-size: 22px;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-buttons .btn {
    width: 100%;
  }
}

/* roulang page: category3 */
/* ========== 设计变量 ========== */
    :root {
      --primary: #2563eb;
      --primary-dark: #1e40af;
      --primary-light: #eff6ff;
      --primary-light-2: #dbeafe;
      --accent: #10b981;
      --accent-light: #ecfdf5;
      --secondary: #8b5cf6;
      --secondary-light: #f5f3ff;
      --warning: #f59e0b;
      --warning-light: #fffbeb;
      --bg: #f8fafc;
      --surface: #ffffff;
      --text: #0f172a;
      --text-weak: #64748b;
      --border: #e2e8f0;
      --radius-lg: 20px;
      --radius-md: 14px;
      --radius-sm: 8px;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
      --shadow: 0 4px 24px rgba(15, 23, 42, 0.07);
      --shadow-lg: 0 16px 48px rgba(37, 99, 235, 0.12);
      --spacing: 24px;
      --transition: 0.25s ease;
      --header-height: 76px;
    }

    /* ========== Reset / Base ========== */
    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "微软雅黑", "Microsoft YaHei", sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--transition);
    }
    button,
    input,
    textarea,
    select {
      font-family: inherit;
      font-size: inherit;
      line-height: inherit;
      border: none;
      outline: none;
      background: none;
      color: inherit;
    }
    ul,
    ol {
      list-style: none;
    }
    :focus-visible {
      outline: 3px solid rgba(37, 99, 235, 0.35);
      outline-offset: 2px;
      border-radius: 4px;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ========== 按钮 ========== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 600;
      line-height: 1.4;
      cursor: pointer;
      transition: all var(--transition);
      white-space: nowrap;
      border: 1px solid transparent;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 4px 16px rgba(37, 99, 235, 0.28);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
    }
    .btn-primary:active {
      transform: translateY(0);
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
    }
    .btn-outline {
      background: transparent;
      color: var(--primary);
      border-color: var(--primary-light-2);
    }
    .btn-outline:hover {
      background: var(--primary-light);
      border-color: var(--primary);
      transform: translateY(-2px);
    }
    .btn-white {
      background: #fff;
      color: var(--primary);
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    }
    .btn-white:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16);
    }
    .btn-sm {
      padding: 8px 20px;
      font-size: 14px;
    }
    .btn-lg {
      padding: 16px 40px;
      font-size: 16px;
    }

    /* ========== 标签 / 徽章 ========== */
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.01em;
      background: var(--primary-light);
      color: var(--primary);
    }
    .badge-accent {
      background: var(--accent-light);
      color: var(--accent);
    }
    .badge-warning {
      background: var(--warning-light);
      color: #b45309;
    }
    .badge-secondary {
      background: var(--secondary-light);
      color: var(--secondary);
    }
    .badge-white {
      background: rgba(255, 255, 255, 0.2);
      color: #fff;
      backdrop-filter: blur(6px);
    }

    /* ========== Header / 导航 ========== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border);
    }
    .header-inner {
      display: flex;
      align-items: center;
      gap: 20px;
      height: var(--header-height);
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .brand-icon {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: #fff;
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
    }
    .brand-text {
      font-size: 18px;
      font-weight: 700;
      color: var(--text);
      letter-spacing: -0.01em;
      white-space: nowrap;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 2px;
      margin-left: 12px;
      flex: 1;
    }
    .nav-link {
      display: inline-flex;
      align-items: center;
      padding: 10px 16px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-weak);
      transition: all var(--transition);
      white-space: nowrap;
    }
    .nav-link:hover {
      color: var(--primary);
      background: var(--primary-light);
    }
    .nav-link.active {
      color: var(--primary);
      background: var(--primary-light);
      font-weight: 600;
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: auto;
      flex-shrink: 0;
    }
    .search-trigger {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 8px 16px;
      border-radius: 999px;
      border: 1px solid var(--border);
      background: var(--surface);
      color: var(--text-weak);
      font-size: 14px;
      cursor: pointer;
      transition: all var(--transition);
    }
    .search-trigger:hover {
      border-color: var(--primary);
      box-shadow: 0 0 0 4px var(--primary-light);
    }
    .search-trigger kbd {
      background: var(--bg);
      border: 1px solid var(--border);
      border-bottom-width: 2px;
      border-radius: 5px;
      padding: 1px 6px;
      font-size: 11px;
      font-family: inherit;
      color: var(--text-weak);
      margin-left: 4px;
    }
    .nav-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border-radius: 10px;
      border: 1px solid var(--border);
      background: var(--surface);
      cursor: pointer;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .nav-toggle svg {
      width: 20px;
      height: 20px;
      stroke: var(--text);
    }
    .nav-toggle.active svg .line2 {
      display: none;
    }

    /* ========== Hero ========== */
    .hero-security {
      position: relative;
      padding: 88px 0 72px;
      background: url('/assets/images/backpic/back-1.png') center 20% / cover no-repeat;
      border-bottom: 1px solid var(--border);
    }
    .hero-security::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(255, 255, 255, 0.96) 0%, rgba(239, 246, 255, 0.88) 60%, rgba(219, 234, 254, 0.72) 100%);
    }
    .hero-inner {
      position: relative;
      z-index: 2;
      max-width: 760px;
    }
    .hero-breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text-weak);
      margin-bottom: 24px;
    }
    .hero-breadcrumb a {
      color: var(--text-weak);
      transition: color var(--transition);
    }
    .hero-breadcrumb a:hover {
      color: var(--primary);
    }
    .hero-breadcrumb .sep {
      opacity: 0.5;
    }
    .hero-breadcrumb .current {
      color: var(--text);
      font-weight: 500;
    }
    .hero-security h1 {
      font-size: 46px;
      line-height: 1.2;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
      color: var(--text);
    }
    .hero-security h1 .gradient-text {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-security .hero-desc {
      font-size: 18px;
      line-height: 1.75;
      color: var(--text-weak);
      margin-bottom: 32px;
      max-width: 620px;
    }
    .hero-btns {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 44px;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      max-width: 680px;
    }
    .metric-card {
      background: rgba(255, 255, 255, 0.8);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 16px 18px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform var(--transition), box-shadow var(--transition);
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow);
    }
    .metric-card .metric-value {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }
    .metric-card .metric-label {
      font-size: 13px;
      color: var(--text-weak);
      margin-top: 4px;
    }

    /* ========== 板块通用 ========== */
    .section {
      padding: 88px 0;
    }
    .section-head {
      text-align: center;
      max-width: 680px;
      margin: 0 auto 56px;
    }
    .section-head .section-tag {
      margin-bottom: 14px;
    }
    .section-head h2 {
      font-size: 34px;
      line-height: 1.3;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-bottom: 14px;
    }
    .section-head p {
      font-size: 16px;
      color: var(--text-weak);
      line-height: 1.7;
    }

    /* ========== 核心能力卡片 ========== */
    .capabilities {
      background: var(--surface);
    }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .feature-card {
      position: relative;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 36px 28px 28px;
      transition: all var(--transition);
      overflow: hidden;
    }
    .feature-card::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      opacity: 0;
      transition: opacity var(--transition);
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: transparent;
      background: var(--surface);
    }
    .feature-card:hover::after {
      opacity: 1;
    }
    .feature-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 20px;
      background: var(--primary-light);
    }
    .feature-card:nth-child(2) .feature-icon {
      background: var(--secondary-light);
    }
    .feature-card:nth-child(3) .feature-icon {
      background: var(--accent-light);
    }
    .feature-card:nth-child(4) .feature-icon {
      background: var(--warning-light);
    }
    .feature-card h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .feature-card p {
      font-size: 14.5px;
      line-height: 1.7;
      color: var(--text-weak);
      margin-bottom: 20px;
    }
    .feature-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      transition: gap var(--transition);
    }
    .feature-link:hover {
      gap: 10px;
    }
    .feature-link svg {
      width: 16px;
      height: 16px;
    }

    /* ========== 防护措施 ========== */
    .protection {
      background: var(--bg);
      border-top: 1px solid var(--border);
    }
    .protection-item {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      margin-bottom: 80px;
    }
    .protection-item:last-child {
      margin-bottom: 0;
    }
    .protection-item.reverse .protection-image {
      order: 2;
    }
    .protection-item.reverse .protection-content {
      order: 1;
    }
    .protection-image {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }
    .protection-image img {
      width: 100%;
      height: 340px;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .protection-image:hover img {
      transform: scale(1.03);
    }
    .protection-image .img-badge {
      position: absolute;
      top: 16px;
      left: 16px;
    }
    .protection-content .badge {
      margin-bottom: 14px;
    }
    .protection-content h3 {
      font-size: 28px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 12px;
    }
    .protection-content .desc {
      font-size: 15.5px;
      color: var(--text-weak);
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .protection-list {
      display: grid;
      gap: 12px;
    }
    .protection-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 15px;
    }
    .check-icon {
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: var(--accent-light);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      margin-top: 2px;
    }
    .check-icon svg {
      width: 12px;
      height: 12px;
      stroke: var(--accent);
      stroke-width: 3;
    }

    /* ========== 安全流程 ========== */
    .process-section {
      background: url('/assets/images/backpic/back-2.png') center / cover fixed no-repeat;
      position: relative;
    }
    .process-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(15, 23, 42, 0.9);
    }
    .process-section .container {
      position: relative;
      z-index: 2;
    }
    .process-section .section-head h2 {
      color: #fff;
    }
    .process-section .section-head p {
      color: rgba(255, 255, 255, 0.72);
    }
    .process-section .section-tag {
      background: rgba(255, 255, 255, 0.15);
      color: #fff;
      backdrop-filter: blur(8px);
    }
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 20px;
    }
    .process-step {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.14);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      position: relative;
      transition: transform var(--transition), background var(--transition);
    }
    .process-step:hover {
      transform: translateY(-6px);
      background: rgba(255, 255, 255, 0.12);
    }
    .step-number {
      font-size: 40px;
      font-weight: 800;
      line-height: 1;
      background: linear-gradient(135deg, #60a5fa, #a78bfa);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 16px;
      display: block;
    }
    .process-step h3 {
      color: #fff;
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .process-step p {
      color: rgba(255, 255, 255, 0.68);
      font-size: 14px;
      line-height: 1.65;
    }
    .process-step::after {
      content: '';
      position: absolute;
      top: 32px;
      right: -14px;
      width: 28px;
      height: 2px;
      background: linear-gradient(90deg, rgba(96, 165, 250, 0.6), transparent);
    }
    .process-step:last-child::after {
      display: none;
    }

    /* ========== FAQ ========== */
    .faq-section {
      background: var(--surface);
    }
    .faq-wrap {
      max-width: 780px;
      margin: 0 auto;
      display: grid;
      gap: 14px;
    }
    .faq-item {
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      background: var(--surface);
      overflow: hidden;
      transition: box-shadow var(--transition), border-color var(--transition);
    }
    .faq-item.open {
      border-color: var(--primary-light-2);
      box-shadow: var(--shadow);
    }
    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      text-align: left;
      padding: 22px 26px;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      background: transparent;
      color: var(--text);
      transition: background var(--transition);
    }
    .faq-question:hover {
      background: var(--bg);
    }
    .faq-icon {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      transition: transform var(--transition), background var(--transition);
    }
    .faq-icon svg {
      width: 14px;
      height: 14px;
      stroke: var(--primary);
      stroke-width: 2.5;
      transition: transform var(--transition);
    }
    .faq-item.open .faq-icon {
      background: var(--primary);
    }
    .faq-item.open .faq-icon svg {
      transform: rotate(45deg);
      stroke: #fff;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
    }
    .faq-item.open .faq-answer {
      max-height: 300px;
    }
    .faq-answer-inner {
      padding: 0 26px 24px;
      color: var(--text-weak);
      font-size: 15px;
      line-height: 1.75;
    }

    /* ========== CTA ========== */
    .cta-section {
      position: relative;
      padding: 88px 0;
      background: url('/assets/images/backpic/back-3.png') center / cover no-repeat;
    }
    .cta-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(37, 99, 235, 0.92), rgba(139, 92, 246, 0.85));
    }
    .cta-inner {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 640px;
      margin: 0 auto;
    }
    .cta-inner .badge-white {
      margin-bottom: 20px;
    }
    .cta-inner h2 {
      font-size: 36px;
      font-weight: 800;
      color: #fff;
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.02em;
    }
    .cta-inner p {
      color: rgba(255, 255, 255, 0.9);
      font-size: 16px;
      line-height: 1.75;
      margin-bottom: 36px;
    }
    .cta-btns {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 14px;
    }

    /* ========== Footer ========== */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 64px 0 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 48px;
      padding-bottom: 48px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-logo-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 16px;
      box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
    }
    .footer-brand .brand-text {
      color: #fff;
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
      display: block;
    }
    .footer-brand p {
      font-size: 14px;
      line-height: 1.7;
      color: #94a3b8;
      max-width: 320px;
    }
    .footer-col h4 {
      color: #fff;
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 20px;
    }
    .footer-col ul {
      display: grid;
      gap: 10px;
    }
    .footer-col ul li a {
      color: #94a3b8;
      font-size: 14px;
      transition: color var(--transition), padding-left var(--transition);
    }
    .footer-col ul li a:hover {
      color: #60a5fa;
      padding-left: 4px;
    }
    .footer-contact li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: #94a3b8;
    }
    .footer-contact svg {
      width: 18px;
      height: 18px;
      color: #60a5fa;
      flex-shrink: 0;
    }
    .footer-bottom {
      padding: 24px 0;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }

    /* ========== 响应式 ========== */
    @media (max-width: 1024px) {
      .features-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }
      .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-step::after {
        display: none;
      }
      .header-actions .search-trigger span {
        display: none;
      }
      .header-actions .search-trigger kbd {
        display: none;
      }
      .header-actions .search-trigger {
        width: 42px;
        height: 42px;
        padding: 0;
        justify-content: center;
        border-radius: 10px;
      }
    }

    @media (max-width: 768px) {
      .section {
        padding: 64px 0;
      }
      .hero-security {
        padding: 64px 0;
      }
      .hero-security h1 {
        font-size: 32px;
      }
      .hero-desc {
        font-size: 16px;
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .protection-item,
      .protection-item.reverse {
        grid-template-columns: 1fr;
        gap: 36px;
        margin-bottom: 56px;
      }
      .protection-item.reverse .protection-image {
        order: 0;
      }
      .protection-item.reverse .protection-content {
        order: 0;
      }
      .protection-image img {
        height: 260px;
      }
      .section-head h2 {
        font-size: 28px;
      }
      .cta-inner h2 {
        font-size: 28px;
      }
      .header-inner {
        gap: 12px;
      }
      .brand-text {
        font-size: 16px;
      }
      .main-nav {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--surface);
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
        padding: 16px 24px 24px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
        margin-left: 0;
      }
      .main-nav.open {
        display: flex;
      }
      .main-nav .nav-link {
        width: 100%;
        padding: 14px 16px;
        font-size: 16px;
      }
      .nav-toggle {
        display: inline-flex;
      }
      .header-actions .btn-primary {
        display: none;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
    }

    @media (max-width: 520px) {
      .container {
        padding: 0 16px;
      }
      .features-grid {
        grid-template-columns: 1fr;
      }
      .process-steps {
        grid-template-columns: 1fr;
      }
      .hero-security h1 {
        font-size: 28px;
      }
      .hero-metrics {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
      }
      .metric-card {
        padding: 12px 10px;
      }
      .metric-card .metric-value {
        font-size: 22px;
      }
      .hero-btns .btn {
        width: 100%;
      }
      .cta-btns .btn {
        width: 100%;
      }
      .section-head {
        margin-bottom: 36px;
      }
      .section-head p {
        font-size: 15px;
      }
    }