/* Ledger官网 - 全站样式表 v1.0.0 */
:root{--primary:#ff5500;--primary-dark:#e64d00;--fg:#1a1a2e;--fg-muted:#666;--bg:#f8f9fa;--bg-alt:#fff;--border:#e0e0e0;--border-light:#f0f0f0;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--radius:8px;--radius-lg:12px;--shadow:0 2px 8px rgba(0,0,0,.08);--shadow-lg:0 4px 16px rgba(0,0,0,.12);--header-h:64px;--container:1200px;--transition:.2s ease}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.6;color:var(--fg);background:var(--bg)}
h1,h2,h3,h4,h5,h6{margin:0 0 .5em;font-weight:600;line-height:1.3}
p{margin:0 0 1em}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer;border:none;background:none}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}
.u-ico{flex-shrink:0;vertical-align:middle}
.u-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;font-size:15px;font-weight:500;border-radius:var(--radius);transition:all var(--transition);white-space:nowrap}
.u-btn--primary{background:var(--primary);color:#fff}
.u-btn--primary:hover{background:var(--primary-dark)}
.u-btn--outline{background:transparent;border:1px solid var(--primary);color:var(--primary)}
.u-btn--outline:hover{background:var(--primary);color:#fff}
.u-btn--lg{padding:14px 28px;font-size:16px}
.u-btn--block{width:100%}
.site-header{position:sticky;top:0;z-index:100;background:var(--bg-alt);border-bottom:1px solid var(--border);height:var(--header-h)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{display:flex;align-items:center;gap:8px;font-size:18px;font-weight:600;color:var(--fg)}
.logo:hover{color:var(--primary)}
.main-nav{display:flex;gap:24px}
.main-nav a{color:var(--fg-muted);font-size:15px;padding:8px 0;position:relative}
.main-nav a:hover,.main-nav a.active{color:var(--primary)}
.main-nav a.active::after{content:'';position:absolute;bottom:0;left:0;right:0;height:2px;background:var(--primary)}
.header-cta{display:flex}
.menu-toggle{display:none;padding:8px}
.hero{background:linear-gradient(135deg,#1a1a2e 0%,#16213e 100%);color:#fff;padding:60px 0 50px;text-align:center}
.hero h1{font-size:clamp(1.75rem,4vw,2.5rem);margin-bottom:16px}
.hero p{font-size:18px;opacity:.9;max-width:600px;margin:0 auto 24px}
.page-hero{background:linear-gradient(135deg,#1a1a2e 0%,#16213e 100%);color:#fff;padding:40px 0 36px}
.page-hero h1{font-size:clamp(1.5rem,3vw,2rem);margin-bottom:8px}
.hero-desc{opacity:.85;margin:0}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;margin-bottom:16px;opacity:.8}
.breadcrumb a{color:#fff;opacity:.7}
.breadcrumb a:hover{opacity:1}
section{padding:50px 0}
section:nth-child(even):not(.hero):not(.page-hero):not(.cta-section){background:var(--bg-alt)}
section h2{font-size:clamp(1.25rem,2.5vw,1.5rem);margin-bottom:24px;text-align:center}
.cta-section{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;text-align:center;padding:50px 0}
.cta-section h2{color:#fff;margin-bottom:12px}
.cta-section p{opacity:.9;margin-bottom:24px}
.card{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;transition:box-shadow var(--transition)}
.card:hover{box-shadow:var(--shadow-lg)}
.faq-item{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;cursor:pointer;font-weight:500;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item .answer{padding:0 20px 16px;color:var(--fg-muted);line-height:1.7}
.faq-grid{display:grid;gap:12px;max-width:800px;margin:0 auto}
.news-filter{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:32px}
.filter-btn{padding:8px 16px;font-size:14px;border-radius:20px;background:var(--bg);color:var(--fg-muted);border:1px solid var(--border);transition:all var(--transition)}
.filter-btn:hover,.filter-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.news-list{display:grid;gap:24px;max-width:800px;margin:0 auto}
.news-card{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px}
.news-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px;font-size:14px}
.news-tag{padding:4px 10px;border-radius:4px;font-size:12px;font-weight:500}
.tag-firmware{background:#e0f2fe;color:#0369a1}
.tag-product{background:#dcfce7;color:#15803d}
.tag-security{background:#fef3c7;color:#b45309}
.news-card h2{font-size:18px;margin-bottom:8px;text-align:left}
.news-card p{color:var(--fg-muted);margin-bottom:16px}
.news-footer{display:flex;gap:12px}
.news-more{text-align:center;margin-top:32px;padding-top:32px;border-top:1px solid var(--border)}
.about-content{max-width:800px;margin:0 auto}
.about-block{margin-bottom:32px}
.about-block h2{font-size:20px;text-align:left;margin-bottom:16px}
.about-list{display:grid;gap:12px}
.about-list li{color:var(--fg-muted)}
.about-disclaimer{background:#fff8f0;border:1px solid #ffe4c4;border-radius:var(--radius-lg);padding:24px}
.disclaimer-box p{margin-bottom:12px;font-size:14px;color:var(--fg-muted)}
.disclaimer-box p:last-child{margin-bottom:0}
.disclaimer-box strong{color:var(--fg)}
.about-cta{text-align:center;padding-top:24px;border-top:1px solid var(--border)}
.about-cta h2{margin-bottom:8px}
.about-cta p{color:var(--fg-muted);margin-bottom:16px}
.contact-grid{display:grid;gap:32px}
.contact-main{display:grid;gap:24px}
.contact-card{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;text-align:center}
.contact-chat{background:linear-gradient(135deg,#f0f7ff 0%,#e8f4ff 100%);border-color:#c7e0ff}
.contact-card h2{font-size:22px;margin-bottom:12px}
.contact-card p{color:var(--fg-muted);margin-bottom:20px}
.service-time{margin-top:16px;font-size:14px;color:var(--fg-muted)}
.contact-topics{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px}
.contact-topics h3{font-size:18px;margin-bottom:16px;text-align:center}
.topic-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px}
.topic-item{display:flex;align-items:center;gap:10px;padding:12px;background:var(--bg);border-radius:var(--radius);font-size:14px}
.contact-sidebar{display:grid;gap:16px}
.sidebar-card{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px}
.sidebar-card h3{font-size:16px;margin-bottom:8px}
.sidebar-card p{font-size:14px;color:var(--fg-muted);margin-bottom:12px}
.sidebar-warning{background:#fef3c7;border-color:#fde68a}
.sitemap-grid{display:grid;gap:32px}
.sitemap-group{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px}
.sitemap-group h2{font-size:18px;text-align:left;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border)}
.sitemap-list li{margin-bottom:12px}
.sitemap-list a{font-weight:500}
.page-desc{display:block;font-size:13px;color:var(--fg-muted);margin-top:2px}
.sitemap-cta{text-align:center;padding:32px;background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius-lg)}
.sitemap-cta h2{margin-bottom:8px}
.sitemap-cta p{color:var(--fg-muted);margin-bottom:16px}
.legal-section{padding:40px 0 60px}
.legal-content{max-width:800px;margin:0 auto}
.legal-update{font-size:14px;color:var(--fg-muted);margin-bottom:32px;padding-bottom:16px;border-bottom:1px solid var(--border)}
.legal-article{margin-bottom:32px}
.legal-article h2{font-size:18px;margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border-light)}
.legal-article h3{font-size:16px;margin:16px 0 8px;color:var(--fg)}
.legal-article p{color:var(--fg-muted);line-height:1.8;margin-bottom:12px}
.legal-article a{text-decoration:underline}
.privacy-highlight{background:linear-gradient(135deg,#f0fdf4 0%,#dcfce7 100%);border:1px solid #bbf7d0;border-radius:var(--radius-lg);padding:24px;margin-bottom:32px}
.privacy-highlight h3{font-size:18px;margin-bottom:12px;color:#15803d}
.privacy-highlight p{margin:0;color:#166534}
.site-footer{background:#1a1a2e;color:#fff;padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:32px;margin-bottom:32px}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:16px;text-transform:uppercase;letter-spacing:.5px}
.footer-col a{display:block;color:rgba(255,255,255,.7);font-size:14px;padding:4px 0;transition:color var(--transition)}
.footer-col a:hover{color:#fff}
.footer-bottom{text-align:center;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);font-size:13px;color:rgba(255,255,255,.6)}
.footer-bottom .disclaimer{margin-top:12px;font-size:12px;opacity:.7}
.mobile-sticky{display:none;position:fixed;bottom:0;left:0;right:0;z-index:99;background:var(--bg-alt);border-top:1px solid var(--border);padding:12px 16px;gap:12px;box-shadow:0 -2px 10px rgba(0,0,0,.08)}
.mobile-sticky .u-btn{flex:1}
.mobile-menu{display:none;position:fixed;top:var(--header-h);left:0;right:0;bottom:0;z-index:99;background:var(--bg-alt);padding:20px;overflow-y:auto}
.mobile-menu.active{display:block}
.mobile-menu a{display:block;padding:14px 0;font-size:16px;color:var(--fg);border-bottom:1px solid var(--border)}
.mobile-menu a:hover,.mobile-menu a.active{color:var(--primary)}
@media(min-width:768px){.contact-grid{grid-template-columns:1fr 280px}.sitemap-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.sitemap-grid{grid-template-columns:repeat(4,1fr)}}
@media(max-width:768px){.main-nav,.header-cta{display:none}.menu-toggle{display:flex}.mobile-sticky{display:flex}body{padding-bottom:70px}section{padding:36px 0}.hero{padding:40px 0 36px}.page-hero{padding:30px 0 26px}.container{padding:0 16px}.footer-grid{grid-template-columns:repeat(2,1fr);gap:24px}}
@media(max-width:480px){.topic-grid{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr}}
@media print{.site-header,.site-footer,.mobile-sticky,.cta-section{display:none}body{background:#fff;color:#000}a{color:#000;text-decoration:underline}}