/* --- 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 0 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;

    }

}