/* ========================================
   USB Redirector 中文官网 - 布局样式
   导航栏 + 页脚 + 通用页面布局
   ======================================== */

/* ---- 导航栏 ---- */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,0.95);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:all .3s ease;height:72px}
.navbar.scrolled{border-bottom-color:#e8ecf0;box-shadow:0 2px 20px rgba(0,0,0,.06)}
.nav-container{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:100%}
.nav-brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex-shrink:0}
.nav-logo{height:38px;width:auto}
.nav-brand-text{display:flex;flex-direction:column;line-height:1.2}
.nav-brand-name{font-size:18px;font-weight:700;color:#4F5355}
.nav-brand-sub{font-size:11px;color:#9ca3af;font-weight:400}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu-item{padding:8px 16px;font-size:14px;color:#4F5355;text-decoration:none;border-radius:8px;transition:all .3s ease;font-weight:500;white-space:nowrap;border:none;background:none;cursor:pointer;display:inline-flex;align-items:center;gap:4px}
.nav-menu-item:hover{color:#108BC2;background:rgba(16,139,194,0.06)}
.nav-menu-item.active{color:#108BC2;background:rgba(16,139,194,0.1);font-weight:600}
.nav-menu-item .dd-arrow{width:14px;height:14px;transition:transform .25s ease;flex-shrink:0}
/* 下拉菜单容器 */
.nav-dropdown{position:relative}
.nav-dropdown.open .dd-arrow{transform:rotate(180deg)}
.nav-dropdown.open .nav-dd-trigger{color:#108BC2;background:rgba(16,139,194,0.06)}
/* 下拉面板 */
.nav-dd-panel{position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%) translateY(4px);min-width:280px;background:#fff;border:1px solid #e8ecf0;border-radius:14px;box-shadow:0 12px 40px rgba(0,0,0,.1);padding:8px;opacity:0;visibility:hidden;transition:all .2s ease;z-index:100}
.nav-dropdown.open .nav-dd-panel{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
/* 下拉项 */
.nav-dd-item{display:flex;align-items:center;gap:14px;padding:10px 14px;border-radius:10px;text-decoration:none;transition:all .2s ease}
.nav-dd-item:hover{background:rgba(16,139,194,0.05)}
.nav-dd-item.nav-dd-active{background:rgba(16,139,194,0.08)}
.nav-dd-icon{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,rgba(16,139,194,0.08),rgba(16,139,194,0.03));display:flex;align-items:center;justify-content:center;flex-shrink:0}
.nav-dd-icon svg{width:18px;height:18px;color:#108BC2}
.nav-dd-text{display:flex;flex-direction:column;gap:2px;min-width:0}
.nav-dd-name{font-size:14px;font-weight:600;color:#1a1d1f;white-space:nowrap}
.nav-dd-active .nav-dd-name{color:#108BC2}
.nav-dd-desc{font-size:12px;color:#9ca3af;white-space:nowrap}
.nav-actions{display:flex;align-items:center;gap:12px}
.btn-sm{padding:9px 20px;font-size:14px;border-radius:8px}
.nav-btn-download{background:transparent;color:#6b7280;border:1.5px solid #d0d5d9}
.nav-btn-download:hover{border-color:#108BC2;color:#108BC2}
.nav-btn-buy{background:linear-gradient(135deg,#108BC2,#0d6fa0);color:#fff !important;box-shadow:0 3px 12px rgba(16,139,194,0.3)}
.nav-btn-buy:hover{background:linear-gradient(135deg,#0d9fe0,#108BC2);color:#fff !important;box-shadow:0 5px 18px rgba(16,139,194,0.4);transform:translateY(-1px)}
.nav-hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;padding:8px;background:none;border:none;cursor:pointer;border-radius:8px;transition:background .3s ease}
.nav-hamburger:hover{background:rgba(0,0,0,0.04)}
.hamburger-line{display:block;width:100%;height:2px;background:#4F5355;border-radius:2px;transition:all .3s ease}
.nav-mobile-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.4);z-index:1001;opacity:0;transition:opacity .3s ease}
.nav-mobile-overlay.open{display:block;opacity:1}
.nav-mobile-menu{position:fixed;top:0;right:-320px;width:300px;max-width:85vw;height:100vh;height:100dvh;background:#fff;z-index:1002;transition:right .35s cubic-bezier(0.4,0,0.2,1);display:flex;flex-direction:column;box-shadow:-4px 0 30px rgba(0,0,0,0.1);overflow:hidden}
.nav-mobile-menu.open{right:0}
.nav-mobile-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid #e8ecf0}
.nav-mobile-header .nav-brand{gap:10px}
.nav-mobile-header .nav-logo{height:32px}
.nav-mobile-header .nav-brand-name{font-size:16px}
.nav-mobile-close{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:none;border:none;cursor:pointer;border-radius:8px;transition:background .3s ease}
.nav-mobile-close:hover{background:rgba(0,0,0,0.04)}
.nav-mobile-close svg{width:22px;height:22px;color:#4F5355}
.nav-mobile-links{padding:12px 16px;display:flex;flex-direction:column;gap:4px;overflow-y:auto;flex:1;min-height:0;-webkit-overflow-scrolling:touch}
.nav-mobile-link{display:block;padding:12px 16px;font-size:16px;color:#4F5355;text-decoration:none;border-radius:10px;font-weight:500;transition:all .2s ease}
.nav-mobile-link:hover,.nav-mobile-link.active{color:#108BC2;background:rgba(16,139,194,0.08)}
/* 移动端分组折叠 */
.nav-mob-group{border-radius:10px}
.nav-mob-group-toggle{display:flex;align-items:center;justify-content:space-between;width:100%;padding:12px 16px;font-size:16px;color:#4F5355;font-weight:500;background:none;border:none;cursor:pointer;border-radius:10px;transition:all .2s ease}
.nav-mob-group-toggle:hover{background:rgba(0,0,0,.03)}
.nav-mob-group-toggle .dd-arrow{width:16px;height:16px;color:#9ca3af;transition:transform .25s ease}
.nav-mob-group.open .nav-mob-group-toggle{color:#108BC2}
.nav-mob-group.open .nav-mob-group-toggle .dd-arrow{transform:rotate(180deg);color:#108BC2}
.nav-mob-group-active .nav-mob-group-toggle{color:#108BC2}
.nav-mob-sub{display:none;padding:0 0 4px 16px}
.nav-mob-group.open .nav-mob-sub{display:flex;flex-direction:column;gap:2px}
.nav-mob-sub .nav-mobile-link{font-size:15px;padding:10px 16px}
.nav-mobile-actions{padding:16px 20px;margin-top:auto;display:flex;flex-direction:column;gap:10px;border-top:1px solid #e8ecf0}
.btn-block{width:100%;justify-content:center;text-align:center}
.nav-spacer{height:72px}

@media(max-width:900px){
    .nav-menu,.nav-actions{display:none}
    .nav-hamburger{display:flex}
}

/* ---- 页脚 ---- */
.site-footer{background:#f8f9fb;border-top:1px solid #e8ecf0;margin-top:80px}
.footer-container{max-width:1200px;margin:0 auto;padding:48px 24px 36px}
.footer-main{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-logo{height:36px;width:auto;opacity:.85}
.footer-brand-info{display:flex;flex-direction:column;line-height:1.3}
.footer-brand-name{font-size:16px;font-weight:700;color:#4F5355}
.footer-brand-sub{font-size:12px;color:#9ca3af}
.footer-contact{display:flex;align-items:center;gap:32px}
.footer-contact-item{display:flex;align-items:center;gap:8px;color:#6b7280;font-size:14px}
.footer-contact-item svg{width:18px;height:18px;color:#108BC2;flex-shrink:0}
.footer-contact-item a{color:#4F5355;text-decoration:none;transition:color .3s ease}
.footer-contact-item a:hover{color:#108BC2}
.footer-divider{height:1px;background:#e8ecf0;margin:28px 0}
.footer-bottom{text-align:center}
.footer-copyright{font-size:14px;color:#4F5355;font-weight:500;margin-bottom:8px}
.footer-notice{font-size:13px;color:#9ca3af;margin-bottom:4px}
.footer-notice strong{color:#6b7280}
.footer-notice-en{font-size:12px;color:#b0b7bf;font-style:italic}

@media(max-width:768px){
    .footer-main{flex-direction:column;align-items:flex-start}
    .footer-contact{flex-direction:column;align-items:flex-start;gap:12px}
    .footer-container{padding:36px 16px 28px}
}

/* ---- 通用子页面样式 ---- */
.page-hero{background:linear-gradient(160deg,#f0f7fc 0%,#ffffff 50%,#f5f8fb 100%);padding:60px 0 48px;position:relative;overflow:hidden}
.page-hero::before{content:'';position:absolute;top:-50%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(16,139,194,0.06) 0%,transparent 70%);border-radius:50%;pointer-events:none}
.page-hero .container{position:relative;z-index:1}
.page-hero-title{font-size:36px;font-weight:800;color:#1a1d1f;line-height:1.25;margin-bottom:16px;letter-spacing:-0.5px}
.page-hero-desc{font-size:17px;color:#6b7280;line-height:1.8;max-width:720px}
.page-hero-img{display:block;max-width:180px;margin-bottom:24px}

.page-content{padding:60px 0}
.page-content h2{font-size:26px;font-weight:700;color:#1a1d1f;margin:48px 0 20px;padding-bottom:12px;border-bottom:2px solid #e8ecf0}
.page-content h2:first-child{margin-top:0}
.page-content h3{font-size:20px;font-weight:600;color:#4F5355;margin:32px 0 14px}
.page-content p{font-size:15px;color:#4F5355;line-height:1.9;margin-bottom:16px}
.page-content ul,.page-content ol{margin:16px 0;padding-left:24px}
.page-content li{font-size:15px;color:#4F5355;line-height:1.8;margin-bottom:10px}
.page-content li strong{color:#1a1d1f}
.page-content img{max-width:100%;border-radius:12px;box-shadow:0 4px 20px rgba(0,0,0,.06);margin:20px 0}
.page-content a{color:#108BC2;text-decoration:none;font-weight:500;transition:color .3s ease}
.page-content a:hover{color:#0d6fa0;text-decoration:underline}
.page-content strong{color:#1a1d1f}

/* 代码块 */
.code-block{background:#1a1d1f;color:#e0e6ed;padding:16px 20px;border-radius:10px;font-family:'Consolas','Monaco','Courier New',monospace;font-size:13.5px;line-height:1.7;overflow-x:auto;margin:16px 0;white-space:pre-wrap;word-break:break-all}
.code-block .prompt{color:#9ca3af}
.code-block .highlight{color:#5ec4ff}
.code-block .success{color:#5cb85c}

/* 终端输出块 */
.terminal-block{background:#1e2127;color:#c8ccd4;padding:16px 20px;border-radius:10px;font-family:'Consolas','Monaco','Courier New',monospace;font-size:13px;line-height:1.7;overflow-x:auto;margin:16px 0;white-space:pre-wrap;word-break:break-all;border:1px solid #2d3139}

/* 表格 */
.styled-table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14px;border-radius:12px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.04);border:1px solid #e8ecf0}
.styled-table thead{background:linear-gradient(135deg,#108BC2,#0d6fa0);color:#fff}
.styled-table th{padding:14px 18px;font-weight:600;text-align:center;font-size:14px}
.styled-table td{padding:12px 18px;border-bottom:1px solid #f0f2f5;text-align:center;color:#4F5355}
.styled-table tbody tr:last-child td{border-bottom:none}
.styled-table tbody tr:hover{background:rgba(16,139,194,0.03)}

/* 卡片布局 */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px;margin:28px 0}
.card{background:#fff;border:1px solid #e8ecf0;border-radius:16px;padding:32px 28px;transition:all .3s ease}
.card:hover{box-shadow:0 8px 30px rgba(0,0,0,.06);transform:translateY(-2px)}
.card h3{font-size:18px;font-weight:600;color:#1a1d1f;margin:0 0 12px}
.card p{font-size:14px;color:#6b7280;line-height:1.7;margin-bottom:0}
.card-icon{width:52px;height:52px;background:linear-gradient(135deg,rgba(16,139,194,0.1),rgba(16,139,194,0.05));border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card-icon svg{width:26px;height:26px;color:#108BC2}
.card-icon img{width:40px;height:40px;border-radius:0;box-shadow:none;margin:0}

/* 步骤时间线 */
.step-list{margin:28px 0}
.step-item{display:flex;gap:24px;padding:28px 0;border-bottom:1px solid #f0f2f5}
.step-item:last-child{border-bottom:none}
.step-num{width:44px;height:44px;flex-shrink:0;border-radius:50%;background:linear-gradient(135deg,#108BC2,#0d6fa0);color:#fff;font-size:16px;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:2px}
.step-body{flex:1;min-width:0}
.step-body h4{font-size:16px;font-weight:600;color:#1a1d1f;margin:0 0 10px}
.step-body p{margin-bottom:12px}
.step-body img{max-width:600px}

/* 信息提示 */
.info-box{background:rgba(16,139,194,0.06);border-left:4px solid #108BC2;padding:16px 20px;border-radius:0 10px 10px 0;margin:20px 0}
.info-box p{margin-bottom:0;color:#4F5355}
.warn-box{background:rgba(245,166,35,0.08);border-left:4px solid #f5a623;padding:16px 20px;border-radius:0 10px 10px 0;margin:20px 0}
.warn-box p{margin-bottom:0;color:#4F5355}

/* 价格卡片 */
.price-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;margin:28px 0}
.price-card{background:#fff;border:1px solid #e8ecf0;border-radius:16px;padding:28px 24px;text-align:center;transition:all .3s ease}
.price-card:hover{box-shadow:0 8px 30px rgba(0,0,0,.06);transform:translateY(-2px)}
.price-card .price{font-size:32px;font-weight:800;color:#108BC2;margin:12px 0 4px}
.price-card .price .currency{font-size:16px;font-weight:600;vertical-align:top;margin-right:2px}
.price-card .price-desc{font-size:13px;color:#9ca3af;margin-bottom:16px}
.price-card h4{font-size:16px;font-weight:700;color:#1a1d1f;margin-bottom:8px}
.price-card .tag{display:inline-block;padding:4px 12px;background:rgba(16,139,194,0.08);color:#108BC2;font-size:12px;font-weight:600;border-radius:100px;margin-bottom:12px}

/* 授权说明区 */
.license-intro{display:flex;align-items:flex-start;gap:24px;flex-wrap:wrap;margin-bottom:20px}
.license-intro-img{width:140px;border-radius:12px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.price-card .buy-btn{display:inline-flex;align-items:center;gap:6px;padding:12px 28px;border-radius:10px;font-size:14px;font-weight:600;text-decoration:none;color:#fff;background:linear-gradient(135deg,#108BC2,#0d6fa0);box-shadow:0 3px 12px rgba(16,139,194,.3);transition:all .3s ease;cursor:pointer}
.price-card .buy-btn:hover{box-shadow:0 5px 18px rgba(16,139,194,.4);transform:translateY(-1px);color:#fff}

/* OEM 开发语言图标 */
.oem-logos{display:flex;gap:16px;align-items:center;margin:28px 0}
.oem-logos img{height:48px;border-radius:0;box-shadow:none}

/* CTA 横幅 */
.page-cta{background:linear-gradient(135deg,#4F5355,#2d3139);padding:56px 0;margin-top:0}
.page-cta .container{text-align:center}
.page-cta h2{font-size:28px;color:#fff;font-weight:700;margin-bottom:12px;border:none;padding:0}
.page-cta p{color:rgba(255,255,255,.7);font-size:16px;margin-bottom:28px}
.page-cta .btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:10px;font-size:15px;font-weight:600;text-decoration:none;transition:all .3s ease;cursor:pointer}
.page-cta .btn-primary{background:linear-gradient(135deg,#108BC2,#0d6fa0);color:#fff;box-shadow:0 4px 16px rgba(16,139,194,0.35)}
.page-cta .btn-primary:hover{box-shadow:0 6px 24px rgba(16,139,194,0.5);transform:translateY(-2px)}
.page-cta .btn-outline{border:1.5px solid rgba(255,255,255,.3);color:#fff;margin-left:12px}
.page-cta .btn-outline:hover{border-color:rgba(255,255,255,.6);background:rgba(255,255,255,.06)}

/* 解决方案卡片 */
.solution-card{background:#fff;border:1px solid #e8ecf0;border-radius:16px;padding:0;margin:28px 0;overflow:hidden}
.solution-card-header{background:linear-gradient(135deg,rgba(16,139,194,0.06),rgba(16,139,194,0.02));padding:20px 28px;border-bottom:1px solid #e8ecf0}
.solution-card-header h4{font-size:17px;font-weight:700;color:#1a1d1f;margin:0}
.solution-card-body{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:0;padding:28px}
.solution-role{text-align:center;padding:0 20px}
.solution-role img{width:48px;height:48px;border-radius:0;box-shadow:none;margin:0 auto 12px;display:block}
.solution-role p{font-size:13px;color:#6b7280;line-height:1.6;margin:0}
.solution-role .role-title{font-size:14px;font-weight:700;color:#1a1d1f;margin-bottom:8px;display:block}
.solution-proto{text-align:center;padding:0 16px}
.solution-proto img{width:36px;height:36px;border-radius:0;box-shadow:none;margin:0 auto 8px;display:block}
.solution-proto .proto-label{font-size:13px;font-weight:700;color:#108BC2}
.solution-card-footer{padding:0 28px 20px;text-align:center}
.solution-card-footer a{font-size:14px}

@media(max-width:768px){
    .page-hero-title{font-size:28px}
    .page-hero-desc{font-size:15px}
    .page-content h2{font-size:22px}
    .card-grid{grid-template-columns:1fr}
    .solution-card-body{grid-template-columns:1fr;gap:20px}
    .solution-proto{padding:12px 0}
    .price-cards{grid-template-columns:1fr}
    .step-item{flex-direction:column;gap:16px}
    .step-body img{max-width:100%}
    .page-cta .btn-outline{margin-left:0;margin-top:12px}
}