*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:#1a1a2e;line-height:1.7;background:#f5f8fc;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
:root{--blue:#0066ff;--blue-dark:#0052cc;--navy:#0a1628;--navy2:#1a2a4a;--orange:#ff6b00;--orange-light:#ff8c33;--green:#00c853;--bg:#f5f8fc;--ink:#1a1a2e;--ink2:#4a4a6a;--ink3:#8a8aa8}

header{background:#fff;box-shadow:0 1px 10px rgba(10,22,40,.07);position:sticky;top:0;z-index:1000}
header .container{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:10px}
.logo img{height:40px;width:auto}
.logo b{font-size:19px;font-weight:800;color:var(--blue);letter-spacing:.5px}
.logo b small{font-weight:500;color:var(--ink3);font-size:12px;margin-left:4px}
nav{display:flex;align-items:center;gap:28px}
nav a{font-size:15px;color:var(--ink2);font-weight:500;position:relative;padding:6px 0;transition:color .2s}
nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--blue);transition:width .3s}
nav a:hover,nav a.active{color:var(--blue)}
nav a:hover::after,nav a.active::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-login{font-size:14px;color:var(--ink2);font-weight:600;padding:8px 16px;border-radius:8px;transition:.2s}
.nav-login:hover{background:#eef4ff;color:var(--blue)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:8px}
.hamburger span{width:24px;height:2px;background:var(--navy);border-radius:2px;transition:.3s}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;border-radius:10px;font-size:15px;font-weight:700;cursor:pointer;border:none;transition:transform .2s,box-shadow .2s,background .2s;line-height:1}
.btn-primary{background:linear-gradient(135deg,var(--orange),#e05e00);color:#fff;box-shadow:0 8px 22px rgba(255,107,0,.35)}
.btn-primary:hover{transform:translateY(-2px) scale(1.02);box-shadow:0 14px 30px rgba(255,107,0,.45)}
.btn-blue{background:linear-gradient(135deg,var(--blue),var(--blue-dark));color:#fff;box-shadow:0 8px 22px rgba(0,102,255,.3)}
.btn-blue:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(0,102,255,.42)}
.btn-ghost{background:#fff;color:var(--blue);border:2px solid var(--blue)}
.btn-ghost:hover{background:#eef4ff}
.btn-lg{padding:15px 36px;font-size:16px;border-radius:12px}
.pulse{animation:btnPulse 2s infinite}
@keyframes btnPulse{0%,100%{box-shadow:0 0 0 0 rgba(255,107,0,.5)}50%{box-shadow:0 0 0 12px rgba(255,107,0,0)}}

.breadcrumb{background:#fff;border-bottom:1px solid #eef1f6;padding:14px 0}
.breadcrumb .container{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink3)}
.breadcrumb a{color:var(--ink3)}
.breadcrumb a:hover{color:var(--blue)}
.breadcrumb span{color:var(--blue);font-weight:600}

.page-head{background:linear-gradient(160deg,var(--navy),var(--navy2));color:#fff;padding:60px 0;text-align:center}
.page-head h1{font-size:38px;font-weight:800;margin-bottom:12px}
.page-head p{font-size:16px;opacity:.85;max-width:720px;margin:0 auto}

section{padding:64px 0}
.sec-title{text-align:center;margin-bottom:44px}
.sec-title .tag{display:inline-block;font-size:12px;font-weight:700;color:var(--blue);background:#eef4ff;padding:4px 14px;border-radius:20px;margin-bottom:12px;letter-spacing:1px}
.sec-title h2{font-size:32px;font-weight:800;color:var(--ink);margin-bottom:12px}
.sec-title p{font-size:16px;color:var(--ink3);max-width:640px;margin:0 auto}

.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:#fff;border-radius:14px;padding:30px 24px;border:1px solid #eef1f6;box-shadow:0 2px 12px rgba(10,22,40,.05);transition:transform .3s,box-shadow .3s}
.card:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(10,22,40,.12)}
.card h3{font-size:18px;font-weight:700;margin:14px 0 8px;color:var(--ink)}
.card p{font-size:14px;color:var(--ink3);line-height:1.7}
.icon{width:58px;height:58px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:26px}
.icon.blue{background:#eef4ff;color:var(--blue)}
.icon.orange{background:#fff3e8;color:var(--orange)}
.icon.green{background:#e8fbf0;color:var(--green)}
.icon.purple{background:#f3eeff;color:#7c3aed}
.icon.cyan{background:#e6faff;color:#06b6d4}
.icon.rose{background:#ffeef1;color:#e11d48}

footer{background:var(--navy);color:#9aa7bd;padding:54px 0 26px}
.footer-grid{display:grid;grid-template-columns:2.2fr 1fr 1fr 1.2fr;gap:36px;margin-bottom:36px}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.footer-col p{font-size:13px;line-height:1.8;color:#8d99ad}
.footer-col a{display:block;font-size:13px;color:#9aa7bd;margin-bottom:9px;transition:color .2s}
.footer-col a:hover{color:var(--orange-light)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:20px;text-align:center;font-size:12px;color:#6b788c}
.footer-bottom a{color:#9aa7bd}
.footer-bottom a:hover{color:#fff}
.footer-sitemap{margin-top:10px;font-size:12px;color:#6b788c}
.footer-sitemap a{color:#8d99ad;margin:0 6px}

.faq-item{background:#fff;border-radius:12px;margin-bottom:16px;border:1px solid #eef1f6;overflow:hidden;box-shadow:0 1px 6px rgba(10,22,40,.04)}
.faq-q{padding:18px 24px;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:16px;font-weight:600;color:var(--ink);transition:background .2s}
.faq-q:hover{background:#f8fbff}
.faq-q .arrow{flex-shrink:0;color:var(--blue);font-size:20px;transition:transform .3s;font-weight:300}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease;padding:0 24px;color:var(--ink2);font-size:14px;line-height:1.8}
.faq-item.open .faq-a{max-height:900px;padding:0 24px 22px}
.faq-a ol{padding-left:20px;list-style:decimal}
.faq-a ol li{margin-bottom:8px}

.news-card{background:#fff;border-radius:14px;overflow:hidden;border:1px solid #eef1f6;box-shadow:0 2px 12px rgba(10,22,40,.05);transition:transform .3s,box-shadow .3s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(10,22,40,.12)}
.news-thumb{height:170px;background-size:cover;background-position:center;position:relative}
.news-thumb .tag{position:absolute;top:12px;left:12px;background:var(--blue);color:#fff;font-size:11px;font-weight:700;padding:4px 10px;border-radius:6px}
.news-body{padding:18px;flex:1;display:flex;flex-direction:column}
.news-body h3{font-size:16px;font-weight:700;line-height:1.5;margin-bottom:8px;color:var(--ink)}
.news-body p{font-size:13px;color:var(--ink3);flex:1;line-height:1.7}
.news-meta{font-size:12px;color:#aab4c4;margin-top:12px;display:flex;justify-content:space-between;align-items:center}
.news-meta .more{color:var(--blue);font-weight:600}

.article{max-width:820px;margin:0 auto;background:#fff;border-radius:16px;padding:48px;border:1px solid #eef1f6;box-shadow:0 2px 16px rgba(10,22,40,.05)}
.article h1{font-size:30px;font-weight:800;line-height:1.4;margin-bottom:16px}
.article .art-meta{font-size:13px;color:#aab4c4;margin-bottom:24px;padding-bottom:20px;border-bottom:1px solid #eef1f6}
.article .art-cover{border-radius:12px;margin-bottom:28px;overflow:hidden}
.article h2{font-size:22px;font-weight:700;margin:28px 0 12px;color:var(--ink)}
.article p{font-size:16px;color:var(--ink2);line-height:1.9;margin-bottom:16px}
.article blockquote{border-left:4px solid var(--blue);background:#f6faff;padding:16px 20px;border-radius:0 8px 8px 0;color:var(--ink2);margin:20px 0;font-size:15px}

.related{margin-top:40px}
.related h3{font-size:20px;font-weight:700;margin-bottom:20px}

.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden}
th,td{padding:14px 18px;text-align:left;font-size:14px;border-bottom:1px solid #eef1f6}
th{background:#f6f9ff;color:var(--ink);font-weight:700}
tr:last-child td{border-bottom:none}

@media(max-width:992px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){
nav{position:fixed;top:70px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;padding:16px 20px;gap:0;box-shadow:0 10px 30px rgba(10,22,40,.1);transform:translateY(-120%);transition:transform .3s;z-index:999}
nav.open{transform:translateY(0)}
nav a{padding:12px 0;width:100%;border-bottom:1px solid #f1f4f9}
.nav-cta{margin-left:auto}
.nav-login{display:none}
.hamburger{display:flex}
.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr 1fr}
.page-head h1{font-size:28px}
.sec-title h2{font-size:24px}
.article{padding:24px}
.article h1{font-size:24px}
}