/* --- 1. 全局变量与重置 (Variables & Reset) --- */
:root {
    --primary-color: #3B46F7; /* 现代亮蓝 */
    --primary-dark: #2563eb;
    --accent-color: #60a5fa;
    --text-main: #1e293b; /* 深岩灰，比纯黑更有质感 */
    --text-secondary: #64748b;
    --bg-body: #f8fafc; /* 极淡的灰蓝背景 */
    --bg-white: #ffffff;
    --radius-md: 12px;
    --radius-lg: 24px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
    --container-width: 1200px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* --- 2. 通用组件 (Utilities) --- */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.39);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.23);
}
.btn-white{
    background: white; color: var(--primary-color); border: 1px solid #e2e8f0; margin-left: 10px;
}

.btn-white:hover{
    color: #fff;
}


.btn-outline {
    background: transparent;
    border: 2px solid white;
    color: white;
    margin-left: 15px;
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-main);
    font-weight: 700;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

/* --- 3. 导航栏 (Header) --- */
.mian-header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

nav {
}
.main-nav{
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
} 
.signal-logo{
    height: 50px;
}
.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-links a:hover { color: var(--primary-color); }

.nav-links .current-post-ancestor a,
.nav-links .current-menu-item a,
.nav-links .current_page_item a,
.nav-links a:hover { color: var(--primary-color); }

/* --- 4. Hero 区域 (Hero Section) --- */
.hero {
    background: linear-gradient(135deg, #e0f2fe 0%, #dbeafe 100%);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 40px;
}

.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(to right, #2563eb, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 90%;
}

.hero-image {
    position: relative;
    width: calc(50% + (100vw - 100%) / 2);
}

.hero-image img {
    transform: perspective(1000px) rotateY(-5deg);
    transition: var(--transition);
}

.hero-image:hover img {
    transform: perspective(1000px) rotateY(0deg);
}

/* --- 5. 核心功能 (Features) --- */
.features {
    padding: 80px 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-white);
    padding: 40px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-align: center;
    border: 1px solid #f1f5f9;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: #eff6ff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--primary-color);
}

.feature-card h3 { margin-bottom: 15px; font-size: 1.25rem; }
.feature-card p { color: var(--text-secondary); font-size: 0.95rem; }

/* --- 6. 应用展示 (App Showcase) --- */
.showcase {
    background: var(--bg-white);
    padding: 100px 0;
}

.showcase-container {
    background: linear-gradient(to right, #f8fafc, #f1f5f9);
    border-radius: var(--radius-lg);
    padding: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.showcase-text { flex: 1; }
.showcase-text h2 { font-size: 2.5rem; margin-bottom: 20px; }
.showcase-text p { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 30px; }

.showcase-img { flex: 1; display: flex; gap: 20px; }
.showcase-img img { border-radius: var(--radius-md); }

/* --- 7. 下载平台 (Downloads) --- */
.downloads {
    padding: 80px 0;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.platform-card {
    background: var(--bg-white);
    padding: 30px;
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid #e2e8f0;
    transition: var(--transition);
}

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

.platform-icon { margin-bottom: 20px; width: 48px; height: 48px; margin: 0 auto 15px;}
.platform-icon img{
    width: 100%;
    height: 100%;
}
.platform-btn {
    width: 100%;
    margin-top: 20px;
    padding: 10px;
    background: var(--primary-color);
    color: var(--bg-body);
    display: block;
    font-weight: bold;
    border-radius: 8px;
    transition: var(--transition);
}
.platform-btn:hover { background: var(--primary-dark); color: #fff; }

.download-grid p{
    font-size:0.85rem; color:#64748b;
}
/* --- 8. 用户评价 (Reviews) --- */
.reviews {
    background: #f1f5f9;
    padding: 80px 0;
}

.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.review-card {
    background: white;
    padding: 30px;
    border-radius: var(--radius-md);
    position: relative;
}

.review-quote {
    color: var(--text-main);
    font-style: italic;
    margin-bottom: 20px;
}

.review-author {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-align: right;
}

/* --- 9. 新闻 (News Grid) --- */
.news { padding: 80px 0; }

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.news-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.news-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }

.news-thumb {
    height: 160px;
    background: #cbd5e1; /* 占位图背景 */
    position: relative;
    overflow: hidden;
}

.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-content { padding: 20px; }
.news-tag { 
    font-size: 0.75rem; 
    color: var(--primary-color); 
    text-transform: uppercase; 
    font-weight: 700;
    margin-bottom: 8px;
    display: block;
}
.news-title { font-size: 1rem; font-weight: 600; line-height: 1.4; }

/* --- 10. 页脚 (Footer) --- */
/* --- 10. 高级页脚 (Footer Refined) --- */
        footer {
            background-color: #0f172a; /* 深邃的夜空蓝/黑，比纯黑更有质感 */
            color: #94a3b8; /* 柔和的灰蓝文字，阅读舒适 */
            padding: 80px 0 30px;
            font-size: 0.9rem;
            margin-top: auto;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr; /* 左侧品牌区宽一些 */
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }

        .footer-brand h2 {
            color: #fff;
            font-size: 1.5rem;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand p {
            line-height: 1.8;
            margin-bottom: 20px;
            max-width: 350px;
            font-size: 0.95rem;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 0.5em;
            font-weight: 600;
        }

        .footer-col ul li {
            margin-bottom: 6px;
        }

        .footer-col ul li a {
            color: #94a3b8;
            transition: all 0.3s ease;
            display: inline-block;
        }

        .footer-col ul li a:hover {
            color: var(--primary-color);
            transform: translateX(5px);
        }

        /* 底部介绍文本块 */
        .footer-intro {
            margin-bottom: 40px;
            background: rgba(255,255,255,0.03);
            padding: 25px;
            border-radius: var(--radius-md);
            font-size: 0.85rem;
            line-height: 1.7;
        }
        
        .footer-intro strong { color: #e2e8f0; }

        /* 友情链接区域 */
        .friend-links {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 30px;
            margin-bottom: 30px;
        }

        .friend-links h5 {
            color: #e2e8f0;
            margin-bottom: 15px;
            font-size: 0.9rem;
            font-weight: 600;
        }

        .link-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }

        .link-tags a {
            font-size: 0.8rem;
            color: #64748b;
            text-decoration: none;
        }

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

        /* 版权行 */
        .copyright-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.05);
            font-size: 0.8rem;
        }

        /* 响应式适配 */
        @media (max-width: 900px) {
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 600px) {
            .footer-top {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 30px;
            }
            .footer-brand{
                grid-column: 1 / -1;
            }
            .copyright-row {
                flex-direction: column;
                gap: 10px;
                text-align: center;
            }
        }
        

/* --- 响应式 (Responsive) --- */
@media (max-width: 768px) {
    .hero-content { grid-template-columns: 1fr; text-align: center; }
    .hero-text h1 { font-size: 2rem; }
    .hero-text p { margin: 0 auto 30px; }
    .showcase-container { flex-direction: column; text-align: center; padding: 30px; }
    .showcase-img { width: 100%; justify-content: center; }
    .download-grid { grid-template-columns: 1fr; }
/*    .nav-links { display: none; /* 简化处理，移动端隐藏菜单 */ }*/
    .hero-image{
        width: 100%;
    }
    .showcase-text h2{
        font-size: 1.6rem;
    }
    .showcase,
    .downloads{
        padding-top: 50px;
        padding-bottom: 50px;
    }
}






/* --- Windows 下载页专用样式 --- */

/* 页面容器 */
.page-wrapper {
    padding: 60px 0 100px;
    background: linear-gradient(to bottom, #f8fafc 0%, #ffffff 100%);
}

/* 1. Hero 区域：下载与截图 */
body:not(.wp-admin) .app-hero {
    text-align: center;
    margin-bottom: 80px;
    display: none;
}
.is-linux #app-hero-windows,
.is-android #app-hero-windows,
.is-windows #app-hero-windows{
    display: block;
}
.is-ios #app-hero-windows,
.is-mac #app-hero-windows{
    display: block;
}
.app-hero{
    padding-top: 80px;
}
.app-hero h1 {
    font-size: 2.5rem;
    color: var(--text-main);
    margin-bottom: 30px;
    font-weight: 800;
}

/* 模拟 Windows 窗口效果 */
.window-frame {
    background: #fff;
/*    border-radius: 12px;*/
/*    border: 1px solid #cbd5e1;*/
/*    max-width: 900px;*/
    margin: 0 auto 40px;
    overflow: hidden;
    position: relative;
    text-align: center;
}

.window-header {
    height: 36px;
    background: #f1f5f9;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    padding-left: 15px;
    gap: 8px;
}

.win-dot { width: 10px; height: 10px; border-radius: 50%; background: #cbd5e1; }
.win-dot.red { background: #ff5f56; }
.win-dot.yellow { background: #ffbd2e; }
.win-dot.green { background: #27c93f; }

.window-frame img {
/*    width: 100%;*/
    width: auto;
    height: auto;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    display: inline-block;
    margin-bottom: 40px;
}

/* 下载操作区 */
.download-action {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}
.download-action svg{
    margin-right:10px; width:24px; height:24px;
}
.download-btn-lg {
    padding: .8em 2em;
    font-size: 1.2rem;
    border-radius: 8px;
    background: var(--primary-color);
    color: white;
    box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.4);
    transition: all 0.3s ease;
    width: 100%;
    max-width: 400px;
}

.download-btn-lg:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 25px -5px rgba(59, 130, 246, 0.5);
    background: var(--primary-dark);
}

/* 警告/提示框 */
.alert-box {
    background: #eff6ff;
    border-left: 4px solid var(--primary-color);
    padding: 15px 20px;
    border-radius: 4px;
    color: #1e3a8a;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 12px;
    text-align: left;
    max-width: 600px;
    width: 100%;
}

.os-links {
    margin-top: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.os-links a { color: var(--primary-color); text-decoration: underline; margin: 0 5px; }

/* 2. 通用板块标题 */
.block-title {
    text-align: center;
    margin-bottom: 40px;
    position: relative;
    width: 100%;
}
.block-title h2 {
    font-size: 1.8rem;
    color: var(--text-main);
    display: inline-flex;
    align-items: center;
    gap: 12px;
}
.block-title h2 svg{
/*    width: 24px;*/
    height: 1em;
    width: 1em;
}

/* 3. 安装步骤 (Process Steps) */
.install-guide {
    margin-bottom: 80px;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.step-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    border: 1px solid #f1f5f9;
    box-shadow: var(--shadow-sm);
    position: relative;
    transition: var(--transition);
}

.step-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: #bfdbfe; }

.step-num {
    font-size: 3rem;
    font-weight: 900;
    color: #f1f5f9;
    position: absolute;
    top: 10px;
    right: 15px;
    line-height: 1;
    z-index: 0;
}

.step-content { position: relative; z-index: 1; }
.step-content h3 { font-size: 1.1rem; margin-bottom: 10px; color: var(--text-main); }
.step-content p { font-size: 0.9rem; color: var(--text-secondary); }

/* 4. 双栏布局：安全与功能 (Grid Layout) */
.info-grid-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 80px;
}

.info-panel {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-md);
    border: 1px solid #f1f5f9;
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
    border-bottom: 2px solid #f1f5f9;
    padding-bottom: 20px;
}

.panel-icon-bg {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: #eff6ff;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.panel-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.list-item {
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.list-item svg {
    flex-shrink: 0;
    color: var(--primary-color);
    margin-top: 3px;
}

.list-item h4 { font-size: 1rem; color: var(--text-main); margin-bottom: 4px; }
.list-item p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.5; }

/* 5. FAQ 区域 */
.faq-section {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid #e2e8f0;
    transition: var(--transition);
}

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

.faq-q {
    font-weight: 700;
    color: var(--text-main);
    font-size: 1.05rem;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.faq-q::before {
    content: "Q";
    display: inline-block;
    background: #fee2e2;
    color: #ef4444;
    width: 24px;
    height: 24px;
    border-radius: 4px;
    text-align: center;
    line-height: 24px;
    font-size: 0.8rem;
}

.faq-a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding-left: 34px; /* Align with text above */
}

/* 响应式适配 */
@media (max-width: 768px) {
    .info-grid-section { grid-template-columns: 1fr; }
    .window-header { display: none; } /* 手机端简化窗口栏 */
    .download-btn-lg { width: 100%; }
    .page-wrapper { padding: 40px 0; }
}





/* --- 下载中心专用样式 (Download Hub) --- */

.hub-wrapper {
    background-color: #f8fafc;
    padding-bottom: 100px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: #334155;
}

/* 1. Hero 区域：多端展示 */
.hub-hero {
    background: linear-gradient(180deg, #ffffff 0%, #eff6ff 100%);
    padding: 80px 0 100px;
    text-align: center;
    overflow: hidden; /* 防止图片动画溢出 */
}

.hub-title {
    font-size: 2.8rem;
    font-weight: 800;
    color: #1e293b;
    margin-bottom: 15px;
    letter-spacing: -0.02em;
}

.hub-subtitle {
    font-size: 1.2rem;
    color: #64748b;
    margin-bottom: 50px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 设备组合图容器 */
.device-mockups {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: -40px; /* 让手机稍微遮挡一点电脑，增加层次感 */
    margin-bottom: 60px;
    transform: translateY(0);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

.mockup-desktop {
    width: 600px;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.12);
    border: 8px solid #1e293b; /* 模拟屏幕边框 */
    background: #fff;
    z-index: 1;
}

.mockup-mobile {
    width: 180px;
    border-radius: 24px;
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
    border: 6px solid #1e293b;
    background: #fff;
    z-index: 2;
    margin-left: -50px; /* 负边距实现重叠 */
    margin-bottom: -20px;
}

/* 2. 平台下载入口 (Platform Grid) */
.platform-selector {
    margin-top: -60px; /* 向上浮动，压在 Hero 区域底部 */
    position: relative;
    z-index: 10;
    margin-bottom: 80px;
}
.platform-selector  .section-header{
    margin-bottom: 20px;
}
.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 15px;
    background: white;
    padding: 20px;
    border-radius: 20px;
    box-shadow: 0 10px 40px -10px rgba(0,0,0,0.1);
    max-width: 1000px;
    margin: 0 auto;
}

.platform-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px 10px;
    border-radius: 12px;
    background: #f8fafc;
    transition: all 0.2s ease;
    text-decoration: none;
    color: #475569;
    border: 2px solid transparent;
}

.platform-item:hover {
    background: #eff6ff;
    border-color: #3b82f6;
    color: #3b82f6;
    transform: translateY(-2px);
}

.platform-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 10px;
    color: inherit;
}

.platform-name {
    font-weight: 700;
    font-size: 1rem;
}

/* 3. 通用板块标题 (复用) */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}
.section-header h2 {
    font-size: 2rem;
    color: #0f172a;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}
.section-header h2 svg{
    width: 1em;
    height: 1em;
}
.section-bg-white {
    background: white;
    padding: 80px 0;
}

/* 4. 安装教程 (Timeline) */
.tutorial-steps {
    display: flex;
    justify-content: space-between;
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

/* 连接线 */
.tutorial-steps::before {
    content: '';
    position: absolute;
    top: 25px;
    left: 40px;
    right: 40px;
    height: 4px;
    background: #e2e8f0;
    z-index: 0;
}

.t-step {
    position: relative;
    z-index: 1;
    flex: 1;
    text-align: center;
    padding: 0 15px;
}

.t-icon-box {
    width: 54px;
    height: 54px;
    flex: 0 0 54px;
    background: white;
    border: 4px solid #e2e8f0;
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: #94a3b8;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

/* 激活状态/Hover效果 */
.t-step:hover .t-icon-box {
    border-color: #3b82f6;
    background: #3b82f6;
    color: white;
    transform: scale(1.1);
}

.t-step h3 { font-size: 1.1rem; margin-bottom: 8px; color: #1e293b; }
.t-step p { font-size: 0.9rem; color: #64748b; line-height: 1.5; }

/* 5. 核心特性与安全 (Bento Grid Style) */
.features-grid-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.feature-box {
    background: #f1f5f9; /* 浅灰色背景 */
    padding: 40px;
    border-radius: 24px;
    transition: transform 0.3s ease;
}

.feature-box:hover { transform: translateY(-5px); }

.feature-box.blue {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
}

.box-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
}
.box-header h3 { font-size: 1.5rem; color: #1e3a8a; }


.feature-box .check-list svg{
    fill: #e11d48;
}
.feature-box.blue .check-list svg{
    fill: #2563eb;
}

.check-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.check-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: rgba(255,255,255,0.6);
    padding: 15px;
    border-radius: 12px;
}

.check-item svg {
    color: #2563eb;
    flex-shrink: 0;
    margin-top: 2px;
}
.check-item h4 { font-size: 1rem; font-weight: 700; color: #334155; margin-bottom: 2px; }
.check-item p { font-size: 0.9rem; color: #64748b; margin: 0; }

/* 6. FAQ 区域 (卡片式) */
.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-bottom: 80px;
}

.faq-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    display: flex;
    gap: 15px;
    position: relative;
}

.faq-icon {
    width: 32px;
    height: 32px;
    background: #fee2e2;
    color: #ef4444;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: bold;
}

.faq-content h4 {
    font-size: 1.05rem;
    margin-bottom: 8px;
    color: #1e293b;
}

.faq-content p {
    font-size: 0.95rem;
    color: #64748b;
    line-height: 1.6;
}

/* 响应式 */
@media (max-width: 850px) {
    .hub-title { font-size: 2rem; }
    .device-mockups { flex-direction: column; align-items: center; gap: 20px; }
    .mockup-desktop { width: 90%; }
    .mockup-mobile { margin-left: 0; margin-bottom: 0; width: 120px; position: absolute; bottom: -20px; right: 20px; }
    
    .tutorial-steps { flex-direction: column; gap: 30px; }
    .tutorial-steps::before { width: 4px; height: 100%; left: 18px; top: 0; } /* 变为垂直线 */
    .t-step { display: flex; text-align: left; gap: 20px; padding: 0;align-items: center; }
    .t-icon-box { margin: 0; 
        width: 40px;
        height: 40px;
        flex: 0 0 40px;
    }
    .t-step h3{
        flex: 0 0 2em;
        line-height: 1.2;
        margin-bottom: 0;
    }
    .features-grid-wrapper { grid-template-columns: 1fr; }
    .faq-grid { grid-template-columns: 1fr; }
}




/* --- 博客列表页专用样式 (News List) --- */

.news-wrapper {
    background-color: #f8fafc; /* 延续统一的浅灰蓝背景 */
    padding: 60px 0 100px;
}

/* 1. 页面头部 (Page Header) */
.page-header {
    text-align: center;
    margin-bottom: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: #1e293b;
    margin-bottom: 15px;
    letter-spacing: -0.025em;
}

.page-header p {
    font-size: 1.1rem;
    color: #64748b;
    line-height: 1.6;
}

/* 2. 文章网格 (News Grid) */
.articles-grid {
    display: grid;
    /* 响应式布局：桌面端4列，平板2-3列，手机1列 */
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); 
    gap: 30px;
    margin-bottom: 60px;
}

.article-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(226, 232, 240, 0.6);
    height: 100%; /* 保证卡片等高 */
}

.article-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border-color: #bfdbfe;
}

/* 图片区域 */
.card-image {
    height: 180px;
    position: relative;
    overflow: hidden;
    background-color: #e2e8f0;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.article-card:hover .card-image img {
    transform: scale(1.08); /* 悬停微缩放 */
}
.card-date{
    display: inline-flex;
    align-items: center;
}
.card-date svg{
    margin-right: 6px;
}
/* 标签 Badge */
.card-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    background: rgba(255, 255, 255, 0.95);
    color: #2563eb;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 6px 12px;
    border-radius: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    z-index: 2;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* 内容区域 */
.card-content {
    padding: 24px;
    flex: 1; /* 让内容撑开，保证footer在底部 */
    display: flex;
    flex-direction: column;
}

.card-meta-top {
    font-size: 0.8rem;
    color: #94a3b8;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 12px;
    line-height: 1.5;
    /* 限制为2行，超出省略 */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.2s;
}

.article-card:hover .card-title {
    color: #2563eb;
}

.card-excerpt {
    font-size: 0.9rem;
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 20px;
    /* 限制为3行 */
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1; /* 占满剩余空间 */
}

.card-footer {
    padding-top: 15px;
    border-top: 1px solid #f1f5f9;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: #94a3b8;
}

.footer-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* 3. 分页 (Pagination) */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 40px;
}

.page-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: white;
    border: 1px solid #e2e8f0;
    color: #64748b;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.page-btn:hover {
    background: #f8fafc;
    border-color: #cbd5e1;
    color: #334155;
}

.page-btn.active {
    background: #2563eb;
    border-color: #2563eb;
    color: white;
    box-shadow: 0 4px 6px rgba(37, 99, 235, 0.2);
}

.page-btn.prev,
.page-btn.next {
    width: auto;
    padding: 0 20px;
}

/* 响应式微调 */
@media (max-width: 768px) {
    .page-header h1 { font-size: 2rem; }
    .articles-grid { gap: 20px; }
}











/* --- 文章详情页专用样式 (Article Detail) --- */

.article-page-bg {
    background-color: #f8fafc;
    padding: 40px 0 80px;
}

/* 1. 面包屑导航 */
.breadcrumbs {
    font-size: 0.9rem;
    color: #64748b;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.breadcrumbs a { color: #64748b; transition: color 0.2s; }
.breadcrumbs a:hover { color: #2563eb; }
.breadcrumbs-divider { color: #cbd5e1; }
.breadcrumbs-current { color: #1e293b; font-weight: 500; }

/* 2. 文章主体容器 */
.article-container {
    background: white;
    border-radius: 24px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    overflow: hidden;
    margin-bottom: 60px;
    border: 1px solid #e2e8f0;
}

/* 头部信息 */
.article-header {
    padding: 60px 60px 40px;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.article-badge {
    display: inline-block;
    background: #eff6ff;
    color: #2563eb;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 20px;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.article-title {
    font-size: 2.5rem;
    line-height: 1.3;
    font-weight: 800;
    color: #1e293b;
    margin-bottom: 30px;
}

.article-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    font-size: 0.95rem;
    color: #64748b;
    border-top: 1px solid #f1f5f9;
    width: 100%;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.author-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.author-name {
    font-weight: 600;
    color: #334155;
}

/* 特色图片 */
.featured-image-wrapper {
    width: 100%;
    height: 500px;
    overflow: hidden;
}

.featured-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 正文区域 */
.article-body {
    padding: 60px;
/*    max-width: 800px;*/
    margin: 0 auto;
    font-size: 1.125rem;
    line-height: 1.8;
    color: #334155;
}

.article-body p { margin-bottom: 24px; }

.article-body h2 { 
    font-size: 1.8rem; 
    color: #1e293b; 
    margin-top: 50px; 
    margin-bottom: 20px; 
    font-weight: 700;
}

.article-body h3 {
    font-size: 1.4rem;
    color: #1e293b;
    margin-top: 40px;
    margin-bottom: 15px;
    font-weight: 600;
}

.article-body ul {
    margin-bottom: 24px;
    padding-left: 20px;
}

.article-body ul li {
    margin-bottom: 10px;
    list-style-type: disc;
    padding-left: 10px;
}

.article-body blockquote {
    border-left: 4px solid #3b82f6;
    background: #f8fafc;
    padding: 20px 30px;
    margin: 40px 0;
    font-style: italic;
    color: #475569;
    border-radius: 0 8px 8px 0;
    font-size: 1.2rem;
}

/* 文章底部标签区 */
.article-footer-area {
    margin-top: 50px;
    padding-top: 30px;
    border-top: 1px solid #e2e8f0;
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.tags-label {
    font-weight: 700;
    color: #1e293b;
    padding-top: 6px; /* 对齐 Tag */
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag-item {
    display: inline-block;
    border: 1px solid #e2e8f0;
    color: #64748b;
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.tag-item:hover {
    border-color: #3b82f6;
    color: #3b82f6;
    background: #eff6ff;
}

/* 3. 上一篇/下一篇 导航 */
.post-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 80px;
}

.nav-link {
    background: white;
    padding: 30px;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    display: flex;
    flex-direction: column;
    text-decoration: none;
    transition: all 0.3s ease;
}

.nav-link:hover {
    border-color: #bfdbfe;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.nav-link.next {
    align-items: flex-end;
    text-align: right;
}

.nav-label {
    font-size: 0.85rem;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 5px;
    font-weight: 700;
}

.nav-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #1e293b;
    line-height: 1.4;
}

/* 4. 相关文章 (复用并覆盖部分样式) */
.related-section {
    margin-top: 80px;
}

.section-heading {
    font-size: 1.5rem;
    font-weight: 800;
    color: #1e293b;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-icon {
    width: 28px;
    height: 28px;
    color: #2563eb; /* 替代行内 stroke */
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

/* 相关文章卡片 - 尺寸调整类 */
.related-card-image {
    height: 160px; /* 覆盖默认高度 */
}

.related-card-badge {
    font-size: 0.7rem;
    padding: 4px 10px;
}

.related-card-content {
    padding: 20px; /* 覆盖默认 padding */
}

.related-card-title {
    font-size: 1rem; /* 覆盖默认标题大小 */
    margin-bottom: 0;
}

.related-card-footer {
    margin-top: 15px;
    font-size: 0.8rem;
    color: #94a3b8;
}

/* 响应式 */
@media (max-width: 900px) {
    .article-header { padding: 40px 20px; }
    .article-body { padding: 30px 20px; }
    .featured-image-wrapper { height: 300px; }
    .post-navigation { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: 1fr; }
    .article-title { font-size: 1.8rem; }
    .nav-link.next { align-items: flex-start; text-align: left; } /* 移动端左对齐更好读 */
}

.row-common{
    margin-bottom: 80px;
}




/* 容器样式：设定点击区域大小 */
.navbar-burger {
  cursor: pointer;
  display: block;
  height: 3.25rem; /* 约 52px */
  width: 3.25rem;
  position: relative;
  color: #333; /* 线条颜色，可以使用 currentColor */
  margin-left: auto; /* 靠右对齐 */
  background: transparent;
  border: none;
  display: none;
  color: var(--primary-color);
}

/* 线条通用样式 */
.navbar-burger span {
  background-color: currentColor; /* 继承父元素文字颜色 */
  display: block;
  height: 2px; /* 线条粗细 */
  width: 16px; /* 线条长度 */
  left: calc(50% - 8px); /* 水平居中 (50%减去宽度的一半) */
  position: absolute;
  transform-origin: center; /* 旋转中心点 */
  transition-duration: 0.3s; /* 动画速度 */
  transition-property: background-color, opacity, transform;
  transition-timing-function: ease-out;
}

/* 第一条线 (顶部) */
.navbar-burger span:nth-child(1) {
  top: calc(50% - 6px);
}

/* 第二条线 (中间) */
.navbar-burger span:nth-child(2) {
  top: calc(50% - 1px);
}

/* 第三条线 (底部) */
.navbar-burger span:nth-child(3) {
  top: calc(50% + 4px);
}

/* --- 激活状态 (变成 X) --- */

/* 第一条线：下移并旋转45度 */
.navbar-burger.is-active span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

/* 第二条线：直接隐藏 */
.navbar-burger.is-active span:nth-child(2) {
  opacity: 0;
}

/* 第三条线：上移并旋转-45度 */
.navbar-burger.is-active span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

@media (max-width: 768px) {
    .block-title h2{
        font-size: 18px;
    }
    .app-hero{
        padding-top: 50px;
    }
    .app-hero h1{
        font-size: 1.8rem;
    }
    .download-btn-lg{
        font-size: 1rem;
        padding-left: 0.4em;
        padding-right: 0.4em;
    }
    .signal-logo{
        height: 30px;
    }
    .feature-box{
        padding: 20px;
    }
    .navbar-burger{
        display: block;
    }
    #signalNavbar{
        position: absolute;
        left: 0;
        top: 100%;
        width: 100%;
        display: none;
        background: rgba(255, 255, 255, 0.9);
        backdrop-filter: blur(10px);
    }
    .nav-links{
        padding-top: 20px;
        padding-bottom: 20px;
        gap: 10px;
        text-align: center;
        flex-direction: column;
    }
}
.news-index{
    padding-top: 100px;
    padding-bottom: 50px;
}
@media screen and (max-width: 768px){
    .news-index{
        padding-top: 50px;
        padding-bottom: 10px;
    }
}