:root{
  --brand:#0B3D91;
  --brand-dark:#082C6B;
  --brand-light:#1A5CC8;
  --accent:#E63946;
  --accent-dark:#B71C2B;
  --bg:#FFFFFF;
  --bg-soft:#F5F7FA;
  --bg-card:#FFFFFF;
  --bg-nav:rgba(255,255,255,0.82);
  --bg-footer:#0B1B33;
  --text-main:#17202A;
  --text-strong:#0D1520;
  --text-body:#1F2937;
  --text-sub:#4B5563;
  --text-muted:#5A6675;
  --text-invert:#FFFFFF;
  --text-footer:#E5E7EB;
  --text-footer-sub:#B8C2D0;
  --border:#D9E0E8;
  --border-soft:#E8EDF3;
  --shadow:0 2px 12px rgba(11,61,145,0.08);
  --shadow-lg:0 8px 32px rgba(11,61,145,0.12);
  --link:#0B3D91;
  --link-hover:#E63946;
  --btn-primary-bg:#0B3D91;
  --btn-primary-text:#FFFFFF;
  --btn-accent-bg:#E63946;
  --btn-accent-text:#FFFFFF;
  --tag-bg:#EAF0FA;
  --tag-text:#0B3D91;
  --banner-overlay:rgba(8,20,45,0.55);
  --banner-text:#FFFFFF;
  --banner-text-sub:#E5E7EB;
  --glass:rgba(255,255,255,0.72);
  --glass-border:rgba(255,255,255,0.35);
  --transition:background-color .3s ease, color .3s ease, border-color .3s ease;
}
html[data-theme="dark"]{
  --bg:#0F172A;
  --bg-soft:#131C31;
  --bg-card:#1B2540;
  --bg-nav:rgba(15,23,42,0.82);
  --bg-footer:#080E1C;
  --text-main:#F1F5F9;
  --text-strong:#FFFFFF;
  --text-body:#E5E7EB;
  --text-sub:#C3CCDA;
  --text-muted:#A5B0C2;
  --text-invert:#FFFFFF;
  --text-footer:#E5E7EB;
  --text-footer-sub:#B8C2D0;
  --border:#2A3854;
  --border-soft:#22304A;
  --shadow:0 2px 12px rgba(0,0,0,0.4);
  --shadow-lg:0 8px 32px rgba(0,0,0,0.5);
  --link:#8AB4F8;
  --link-hover:#FF8A96;
  --btn-primary-bg:#2E6BE6;
  --btn-primary-text:#FFFFFF;
  --btn-accent-bg:#E63946;
  --btn-accent-text:#FFFFFF;
  --tag-bg:#22304A;
  --tag-text:#8AB4F8;
  --banner-overlay:rgba(5,10,25,0.7);
  --banner-text:#FFFFFF;
  --banner-text-sub:#E5E7EB;
  --glass:rgba(27,37,64,0.72);
  --glass-border:rgba(255,255,255,0.12);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--text-body);
  font-size:16px;
  line-height:1.8;
  transition:var(--transition);
  overflow-x:hidden;
}
img,svg{max-width:100%;display:block}
a{color:var(--link);text-decoration:none;transition:color .2s ease}
a:hover,a:focus{color:var(--link-hover);text-decoration:underline}
h1,h2,h3,h4,h5{color:var(--text-strong);line-height:1.4;font-weight:700;transition:var(--transition)}
h1{font-size:2.2rem}
h2{font-size:1.75rem}
h3{font-size:1.3rem}
h4{font-size:1.1rem}
p{color:var(--text-body);margin-bottom:1rem}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 20px;z-index:9999}
.skip-link:focus{left:0}

/* ===== 顶部信息条 ===== */
.top-bar{background:var(--brand-dark);color:#FFFFFF;font-size:.85rem;padding:6px 0}
.top-bar .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.top-bar a{color:#FFFFFF}
.top-bar a:hover{color:#FFD166;text-decoration:underline}
.top-bar span{color:#E5E7EB}

/* ===== 导航 ===== */
.nav-wrap{position:sticky;top:0;z-index:1000;background:var(--bg-nav);border-bottom:1px solid var(--border);box-shadow:var(--shadow);transition:var(--transition);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:12px 0;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.35rem;font-weight:800;color:var(--text-strong)}
.logo svg{width:40px;height:40px;flex-shrink:0}
.logo-text small{display:block;font-size:.7rem;font-weight:400;color:var(--text-muted);letter-spacing:1px}
.nav-links{display:flex;align-items:center;gap:6px;list-style:none;flex-wrap:wrap}
.nav-links a{color:var(--text-body);font-size:.95rem;padding:8px 12px;border-radius:8px;font-weight:500;transition:background-color .2s ease,color .2s ease}
.nav-links a:hover,.nav-links a:focus{background:var(--tag-bg);color:var(--brand);text-decoration:none}
.nav-actions{display:flex;align-items:center;gap:10px}
.search-box{position:relative;display:flex;align-items:center}
.search-box input{
  width:180px;padding:9px 36px 9px 14px;border:1px solid var(--border);border-radius:20px;
  background:var(--bg-soft);color:var(--text-body);font-size:.9rem;outline:none;transition:var(--transition)
}
.search-box input::placeholder{color:var(--text-muted)}
.search-box input:focus{border-color:var(--brand);background:var(--bg);box-shadow:0 0 0 3px rgba(11,61,145,0.15)}
.search-box button{position:absolute;right:4px;background:var(--brand);border:none;border-radius:50%;width:30px;height:30px;cursor:pointer;display:flex;align-items:center;justify-content:center;color:#fff}
.search-box button:hover{background:var(--brand-light)}
.theme-toggle{background:var(--bg-soft);border:1px solid var(--border);border-radius:50%;width:40px;height:40px;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text-body);transition:var(--transition)}
.theme-toggle:hover{background:var(--tag-bg);color:var(--brand)}
.menu-toggle{display:none;background:var(--bg-soft);border:1px solid var(--border);border-radius:8px;width:42px;height:42px;cursor:pointer;color:var(--text-body);align-items:center;justify-content:center}

/* ===== Banner 轮播 ===== */
.banner{position:relative;overflow:hidden;background:var(--brand-dark)}
.banner-slides{position:relative;height:480px}
.banner-slide{position:absolute;inset:0;opacity:0;transition:opacity .8s ease;display:flex;align-items:center}
.banner-slide.active{opacity:1;z-index:2}
.banner-slide svg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.banner-content{position:relative;z-index:3;max-width:640px;padding:0 20px;margin-left:auto;margin-right:auto;width:100%;text-shadow:0 2px 12px rgba(0,0,0,0.6)}
.banner-content .tag{display:inline-block;background:var(--btn-accent-bg);color:var(--btn-accent-text);font-size:.8rem;padding:4px 14px;border-radius:20px;margin-bottom:16px;font-weight:600}
.banner-content h2{color:#FFFFFF;font-size:2.4rem;margin-bottom:16px;text-shadow:0 2px 16px rgba(0,0,0,0.7)}
.banner-content p{color:#F1F5F9;font-size:1.05rem;margin-bottom:24px;text-shadow:0 2px 12px rgba(0,0,0,0.7)}
.banner-btn{display:inline-block;background:var(--btn-primary-bg);color:#FFFFFF;padding:12px 32px;border-radius:30px;font-weight:600;border:none;cursor:pointer;font-size:1rem;transition:transform .2s ease,background-color .2s ease;text-decoration:none}
.banner-btn:hover{background:#1A5CC8;color:#FFFFFF;text-decoration:none;transform:translateY(-2px)}
.banner-dots{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5}
.banner-dots button{width:12px;height:12px;border-radius:50%;border:2px solid #FFFFFF;background:transparent;cursor:pointer;padding:0;transition:background-color .3s ease}
.banner-dots button.active{background:#FFFFFF}
.banner-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:5;background:rgba(0,0,0,0.4);border:1px solid rgba(255,255,255,0.5);color:#FFFFFF;width:44px;height:44px;border-radius:50%;cursor:pointer;font-size:1.2rem;display:flex;align-items:center;justify-content:center;transition:background-color .2s ease}
.banner-arrow:hover{background:rgba(0,0,0,0.7)}
.banner-arrow.prev{left:20px}
.banner-arrow.next{right:20px}

/* ===== 通用区块 ===== */
.section{padding:64px 0}
.section-alt{background:var(--bg-soft)}
.section-head{text-align:center;max-width:760px;margin:0 auto 44px}
.section-head .eyebrow{display:inline-block;color:var(--brand);font-size:.85rem;font-weight:700;letter-spacing:2px;text-transform:uppercase;margin-bottom:10px}
.section-head h2{position:relative;display:inline-block;padding-bottom:14px;margin-bottom:16px}
.section-head h2::after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:56px;height:4px;background:var(--accent);border-radius:2px}
.section-head p{color:var(--text-sub);font-size:1.02rem}
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--glass);border:1px solid var(--glass-border);border-radius:14px;padding:28px;box-shadow:var(--shadow);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--brand-light)}
.card h3{color:var(--text-strong);margin-bottom:12px}
.card p{color:var(--text-body);font-size:.95rem;margin-bottom:0}
.card .icon{width:52px;height:52px;border-radius:12px;background:var(--tag-bg);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card .icon svg{width:28px;height:28px}

/* ===== 统计数字 ===== */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-item{background:var(--glass);border:1px solid var(--glass-border);border-radius:14px;padding:32px 16px;box-shadow:var(--shadow);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.stat-num{font-size:2.6rem;font-weight:800;color:var(--brand);line-height:1.2;font-variant-numeric:tabular-nums}
.stat-label{color:var(--text-sub);font-size:.95rem;margin-top:8px}

/* ===== 文章列表 ===== */
.article-card{background:var(--glass);border:1px solid var(--glass-border);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .25s ease,box-shadow .25s ease;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.article-thumb{height:170px;overflow:hidden}
.article-thumb svg{width:100%;height:100%}
.article-body{padding:22px;display:flex;flex-direction:column;flex:1}
.article-meta{display:flex;gap:14px;font-size:.82rem;color:var(--text-muted);margin-bottom:10px;flex-wrap:wrap}
.article-meta .cat{color:var(--brand);font-weight:600}
.article-body h3{font-size:1.12rem;margin-bottom:10px;color:var(--text-strong)}
.article-body p{font-size:.92rem;color:var(--text-sub);flex:1}
.read-more{color:var(--link);font-weight:600;font-size:.9rem;margin-top:12px;display:inline-flex;align-items:center;gap:6px}
.read-more:hover{color:var(--link-hover)}

/* ===== FAQ ===== */
.faq-list{max-width:900px;margin:0 auto}
.faq-item{background:var(--glass);border:1px solid var(--glass-border);border-radius:12px;margin-bottom:14px;overflow:hidden;box-shadow:var(--shadow);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.faq-q{width:100%;text-align:left;background:none;border:none;padding:20px 24px;font-size:1.02rem;font-weight:600;color:var(--text-strong);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;font-family:inherit;transition:background-color .2s ease}
.faq-q:hover{background:var(--bg-soft)}
.faq-q .arrow{flex-shrink:0;transition:transform .3s ease;color:var(--brand);font-size:1.2rem}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 24px 22px;color:var(--text-body);font-size:.95rem;line-height:1.85}
.faq-a-inner p{margin-bottom:10px}
.faq-a-inner p:last-child{margin-bottom:0}

/* ===== HowTo ===== */
.howto-steps{max-width:900px;margin:0 auto;counter-reset:step}
.howto-step{position:relative;padding:0 0 32px 68px;border-left:2px solid var(--border);margin-left:24px}
.howto-step:last-child{border-left-color:transparent;padding-bottom:0}
.howto-step::before{counter-increment:step;content:counter(step);position:absolute;left:-25px;top:0;width:48px;height:48px;border-radius:50%;background:var(--brand);color:#FFFFFF;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem;border:4px solid var(--bg)}
.howto-step h3{color:var(--text-strong);margin-bottom:8px}
.howto-step p{color:var(--text-body);font-size:.95rem}

/* ===== 案例 ===== */
.case-card{background:var(--glass);border:1px solid var(--glass-border);border-radius:14px;padding:28px;box-shadow:var(--shadow);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.case-card .quote{font-size:1rem;color:var(--text-body);font-style:italic;border-left:4px solid var(--accent);padding-left:16px;margin:16px 0}
.case-user{display:flex;align-items:center;gap:12px;margin-top:18px}
.case-avatar{width:48px;height:48px;border-radius:50%;flex-shrink:0}
.case-user strong{display:block;color:var(--text-strong);font-size:.95rem}
.case-user span{color:var(--text-muted);font-size:.82rem}

/* ===== 表格 ===== */
.table-wrap{overflow-x:auto;border-radius:12px;border:1px solid var(--border);box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;background:var(--bg-card);min-width:600px}
thead th{background:var(--brand);color:#FFFFFF;padding:14px 18px;text-align:left;font-size:.95rem;font-weight:600}
tbody td{padding:13px 18px;border-bottom:1px solid var(--border-soft);color:var(--text-body);font-size:.92rem}
tbody tr:last-child td{border-bottom:none}
tbody tr:nth-child(even){background:var(--bg-soft)}
tbody tr:hover{background:var(--tag-bg)}

/* ===== 团队 ===== */
.team-card{text-align:center;background:var(--glass);border:1px solid var(--glass-border);border-radius:14px;padding:28px 20px;box-shadow:var(--shadow);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.team-avatar{width:88px;height:88px;border-radius:50%;margin:0 auto 16px}
.team-card h3{font-size:1.05rem;margin-bottom:4px}
.team-card .role{color:var(--brand);font-size:.85rem;font-weight:600;margin-bottom:10px}
.team-card p{font-size:.88rem;color:var(--text-sub);margin-bottom:0}

/* ===== 新闻 ===== */
.news-item{display:flex;gap:20px;padding:20px;background:var(--glass);border:1px solid var(--glass-border);border-radius:12px;box-shadow:var(--shadow);margin-bottom:16px;transition:transform .2s ease;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.news-item:hover{transform:translateX(4px)}
.news-date{flex-shrink:0;width:70px;text-align:center;border-right:1px solid var(--border);padding-right:16px}
.news-date .day{font-size:1.6rem;font-weight:800;color:var(--brand);line-height:1}
.news-date .ym{font-size:.78rem;color:var(--text-muted)}
.news-content h3{font-size:1.05rem;margin-bottom:6px}
.news-content p{font-size:.9rem;color:var(--text-sub);margin-bottom:0}

/* ===== 联系 ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.contact-info-item{display:flex;gap:16px;margin-bottom:22px}
.contact-icon{width:44px;height:44px;border-radius:10px;background:var(--tag-bg);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.contact-icon svg{width:22px;height:22px}
.contact-info-item strong{display:block;color:var(--text-strong);margin-bottom:2px;font-size:.95rem}
.contact-info-item span{color:var(--text-sub);font-size:.9rem}
.contact-form{background:var(--glass);border:1px solid var(--glass-border);border-radius:14px;padding:28px;box-shadow:var(--shadow);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.form-group{margin-bottom:18px}
.form-group label{display:block;color:var(--text-strong);font-size:.9rem;font-weight:600;margin-bottom:6px}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:11px 14px;border:1px solid var(--border);border-radius:8px;background:var(--bg-soft);color:var(--text-body);font-size:.95rem;font-family:inherit;outline:none;transition:var(--transition)}
.form-group input::placeholder,.form-group textarea::placeholder{color:var(--text-muted)}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:var(--brand);background:var(--bg);box-shadow:0 0 0 3px rgba(11,61,145,0.15)}
.form-group textarea{resize:vertical;min-height:110px}
.btn-submit{background:var(--btn-primary-bg);color:var(--btn-primary-text);border:none;padding:13px 36px;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;font-family:inherit;transition:background-color .2s ease,transform .2s ease}
.btn-submit:hover{background:#1A5CC8;transform:translateY(-2px)}

/* ===== 面包屑 ===== */
.breadcrumb{padding:14px 0;font-size:.88rem;color:var(--text-muted)}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.breadcrumb a{color:var(--link)}
.breadcrumb li::after{content:"›";margin-left:8px;color:var(--text-muted)}
.breadcrumb li:last-child::after{content:""}
.breadcrumb li:last-child{color:var(--text-sub)}

/* ===== 锚点导航 ===== */
.anchor-nav{background:var(--bg-soft);border-bottom:1px solid var(--border);padding:0}
.anchor-nav ul{list-style:none;display:flex;flex-wrap:wrap;gap:4px;padding:10px 0}
.anchor-nav a{display:block;padding:6px 14px;border-radius:20px;font-size:.85rem;color:var(--text-sub);transition:var(--transition)}
.anchor-nav a:hover{background:var(--tag-bg);color:var(--brand);text-decoration:none}

/* ===== Footer ===== */
footer{background:var(--bg-footer);color:var(--text-footer);padding:56px 0 0;transition:var(--transition)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:36px;padding-bottom:40px}
.footer-col h4{color:#FFFFFF;font-size:1rem;margin-bottom:18px;font-weight:700}
.footer-col p,.footer-col li{color:var(--text-footer);font-size:.88rem;line-height:1.9}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:8px}
.footer-col a{color:var(--text-footer)}
.footer-col a:hover{color:#FFD166;text-decoration:underline}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-logo svg{width:36px;height:36px}
.footer-logo span{color:#FFFFFF;font-size:1.2rem;font-weight:800}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.15);padding:22px 0;font-size:.82rem;color:var(--text-footer-sub)}
.footer-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-bottom a{color:var(--text-footer-sub)}
.footer-bottom a:hover{color:#FFD166}
.footer-links{display:flex;flex-wrap:wrap;gap:14px}

/* ===== 返回顶部 ===== */
.back-top{position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;background:var(--brand);color:#FFFFFF;border:none;cursor:pointer;display:none;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);z-index:900;transition:background-color .2s ease,transform .2s ease}
.back-top:hover{background:var(--brand-light);transform:translateY(-3px)}
.back-top.show{display:flex}

/* ===== 滚动动画 ===== */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
}
@media (max-width:768px){
  h1{font-size:1.6rem}
  h2{font-size:1.4rem}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg-nav);flex-direction:column;padding:16px;border-bottom:1px solid var(--border);box-shadow:var(--shadow-lg);gap:4px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
  .nav-links.open{display:flex}
  .nav-links a{width:100%;padding:12px}
  .menu-toggle{display:flex}
  .search-box input{width:130px}
  .banner-slides{height:420px}
  .banner-content h2{font-size:1.6rem}
  .banner-content p{font-size:.95rem}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:44px 0}
  .banner-arrow{display:none}
  .top-bar .container{justify-content:center;text-align:center}
}
@media (max-width:480px){
  .container{padding:0 14px}
  .banner-slides{height:460px}
  .banner-content h2{font-size:1.35rem}
  .stat-num{font-size:2rem}
  .news-item{flex-direction:column;gap:10px}
  .news-date{border-right:none;border-bottom:1px solid var(--border);padding:0 0 10px;width:100%;text-align:left;display:flex;gap:8px;align-items:baseline}
}