/* =========================================
           CSS Reset & Variables
           ========================================= */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        :root {
            /* 颜色变量 */
            --gradient-btn: linear-gradient(90deg, #e032d9 0%, #9932d9 100%);
            --text-gold: #fce17a;
            --text-pink: #e032d9;
            --bg-black: #000000;
            
            /* 为你提供的 CSS 类设置的基础变量 (类似 Tailwind 标准) */
            --spacing: 0.25rem;       /* 基础间距单位 4px */
            --container-7xl: 80rem;   /* 最大宽度 1280px */
        }

        body {
            background-color: var(--bg-black);
            color: #ffffff;
            line-height: 1.6;
            padding-top: 120px;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        /* =========================================
           你提供的自定义布局 CSS (网格、间距等)
           ========================================= */
        @media (width >= 64rem) {
            .lg\:grid-cols-2 {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }
        }

        @media (width >= 40rem) {
            .sm\:py-10 {
                padding-block: calc(var(--spacing) * 10);
            }
            .sm\:gap-8 {
                gap: calc(var(--spacing) * 8);
            }
        }

        .py-8 {
            padding-block: calc(var(--spacing) * 19);
        }

        .px-4 {
            padding-inline: calc(var(--spacing) * 4);
        }

        .gap-6 {
            gap: calc(var(--spacing) * 6);
        }

        .items-center {
            align-items: center;
        }

        .max-w-7xl {
            max-width: var(--container-7xl);
        }

        .h-full {
            height: 100%;
        }

        .grid {
            display: grid;
        }

        .mx-auto {
            margin-inline: auto;
        }

        /* =========================================
           Top Bar & Navbar 组件样式
           ========================================= */
        .top-bar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 8px 5%;
            background-color: #0a0a0a;
            font-size: 0.8rem;
            color: #888;
            border-bottom: 1px solid #222;
            height: 40px;
            box-sizing: border-box;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            width: 100%;
            z-index: 1001;
        }

        .top-bar .langs span.active { color: var(--text-pink); }
        .top-bar .langs span { margin: 0 4px; cursor: pointer; transition: color 0.3s; }
        .top-bar .langs span:hover { color: #fff; }

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 5%;
            background-color: var(--bg-black);
            height: 80px;
            box-sizing: border-box;
            overflow: visible;
            position: fixed;
            top: 40px;
            left: 0;
            right: 0;
            width: 100%;
            z-index: 1000;
        }

        .logo img { height: 74px; width: auto; }

        .nav-links { display: flex; gap: 30px; align-items: center; }
        .nav-links a { font-size: 0.9rem; transition: color 0.3s; }
        .nav-links a:hover, .nav-links a.active { color: var(--text-pink); }

        .nav-actions { display: flex; gap: 15px; }

        /* 汉堡菜单按钮 (默认桌面端隐藏) */
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 32px;
            height: 32px;
            background: none;
            border: none;
            padding: 0;
            cursor: pointer;
            z-index: 1002;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: #ffffff;
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .btn {
            padding: 10px 20px;
            border-radius: 5px;
            font-weight: bold;
            font-size: 0.9rem;
            cursor: pointer;
            transition: transform 0.2s, opacity 0.3s;
        }
        .btn:hover { opacity: 0.9; transform: translateY(-2px); }
        .btn-outline { background: transparent; border: 1px solid #555; color: #fff; }
        .btn-outline:hover { border-color: var(--text-pink); }
        .btn-primary { background: var(--gradient-btn); border: none; color: #fff; }

        /* =========================================
           Hero/Banner 样式 (包含背景图设置)
           ========================================= */
        .hero-banner-wrapper {
            /* 在这里插入你想要的 Banner 背景图片路径 */
            background-image: url('/img/banner.webp'); 
            
            /* 如果图片没加载出来，显示的备用渐变背景 */
            background-color: #120415; 
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
        }

        /* 为背景图增加一个半透明遮罩，让文字更清晰（可选） */
        .hero-banner-wrapper::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0, 0, 0, 0.4); 
            pointer-events: none;
        }

        /* 确保内容在遮罩层之上 */
        .hero-container {
            position: relative;
            z-index: 2;
        }

        /* 左侧文字内容样式 */
        .trust-badge {
            display: inline-flex;
            align-items: center;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            margin-bottom: 20px;
            border: 1px solid rgba(255,255,255,0.1);
        }

        .trust-badge .dot {
            height: 8px; width: 8px; background-color: #00ff88;
            border-radius: 50%; margin-right: 8px; box-shadow: 0 0 8px #00ff88;
        }

        .hero-content h1 { font-size: 3.2rem; line-height: 1.2; margin-bottom: 20px; font-weight: 700; }
        .hero-content h1 .highlight { color: var(--text-gold); }
        .hero-content p { color: #cccccc; font-size: 1.1rem; margin-bottom: 40px; max-width: 500px; }
        .hero-buttons { display: flex; gap: 20px; }

        /* 右侧图片样式 */
        .hero-image {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-image img {
            max-width: 100%;
            height: auto;
            object-fit: contain;
            /* 如果还没放图片，占位高度 */
            min-height: 350px; 
        }

        /* 移动端适配调整 */
        @media (max-width: 992px) {
            .nav-toggle {
                display: flex;
            }

            .nav-links {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                background-color: #0a0a0a;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: 0 12px 24px rgba(0, 0, 0, 0.4);
                max-height: 0;
                overflow: hidden;
                opacity: 0;
                visibility: hidden;
                transition: max-height 0.3s ease, opacity 0.25s ease;
            }

            .nav-links.open {
                max-height: 320px;
                opacity: 1;
                visibility: visible;
            }

            .nav-links a {
                width: 100%;
                padding: 14px 5%;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }

            .nav-links a:last-child {
                border-bottom: none;
            }

            .hero-content h1 { font-size: 2.5rem; }
            .hero-content { display: flex; flex-direction: column; align-items: center; text-align: center; }
        }

        /* =========================================
   Second Part: Features & Security Cards (左大右小布局)
   ========================================= */

/* 大屏下设置比例：左侧占 1.6fr，右侧占 1fr (约为 62% : 38%) */
@media (min-width: 64rem) {
    .lg\:grid-why-security {
        grid-template-columns: 1.6fr 1fr;
    }
}

.features-section {
    background-color: var(--bg-black);
    padding-top: 2rem;
    padding-bottom: 5rem;
    position: relative;
    overflow: hidden;
}

/* 基础卡片样式 (深色圆角边框) */
.feature-card {
    background-color: rgba(18, 18, 18, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 1.4rem 2rem;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    height: 100%; /* 确保左右两张卡片保持相同高度 */
}

.feature-card h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 1rem;
}

/* 左侧 Why Card 样式 */
.why-card p {
    color: #a1a1aa;
    font-size: 1rem;
    line-height: 1.7;
}

.underline-link {
    color: #ffffff;
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* 左侧微弱紫色光晕背景 */
.why-card::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, rgba(224, 50, 217, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

/* 右侧 Security Snapshot 列表样式 */
.security-list {
    list-style: none;
    padding-left: 0;
}

.security-list li {
    color: #d4d4d8;
    font-size: 0.95rem;
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
}

.security-list li:last-child {
    margin-bottom: 0;
}

.security-list li::before {
    content: "•";
    color: #a1a1aa;
    font-weight: bold;
    font-size: 1.2rem;
    margin-right: 0.75rem;
    line-height: 1;
}

/* =========================================
   Third Part: Install App Section 样式
   ========================================= */

.install-section {
    background-color: var(--bg-black);
    padding-top: 2rem;
    padding-bottom: 5rem;
    color: #ffffff;
}

/* 顶部 Header (标题与 Tab 按钮平行排列) */
.install-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.install-title h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.install-title p {
    color: #a1a1aa;
    font-size: 0.95rem;
}

/* Tab 切换按钮组 */
.install-tabs {
    display: flex;
    gap: 0.5rem;
}

.tab-btn {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #ffffff;
    padding: 8px 18px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    border-color: var(--text-pink);
}

.tab-btn.active {
    background: var(--gradient-btn);
    border-color: transparent;
}

/* 左侧大图卡片 */
.app-image-card {
    background-color: rgba(18, 18, 18, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.app-image-card img {
    width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: 12px;
}

/* 右侧内容容器 */
.app-info-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* 通用右侧深色卡片 */
.info-card {
    background-color: rgba(18, 18, 18, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 1.75rem 2rem;
    position: relative;
    backdrop-filter: blur(10px);
}

.info-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #ffffff;
}

/* 有序列表样式 */
.step-list {
    padding-left: 1.25rem;
    color: #d4d4d8;
    font-size: 0.95rem;
}

.step-list li {
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.step-list li:last-child {
    margin-bottom: 0;
}

.step-list strong, .step-list em {
    color: #ffffff;
}

/* 无序列表样式 (•) */
.bullet-list {
    list-style: none;
    padding-left: 0;
    color: #d4d4d8;
    font-size: 0.95rem;
}

.bullet-list li {
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
    line-height: 1.5;
}

.bullet-list li:last-child {
    margin-bottom: 0;
}

.bullet-list li::before {
    content: "•";
    color: #a1a1aa;
    font-weight: bold;
    margin-right: 0.75rem;
}

/* 防伪卡片右侧微弱圆轮背景装饰 */
.warning-card {
    overflow: hidden;
}


/* 底部按钮排版 */
.install-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
}

/* =========================================
   修正第三区域左右卡片间距 (gap)
   ========================================= */

/* 1. 显式指定第三区域的 Grid 间距 */
.install-section .grid {
    display: grid;
    gap: 2rem; /* 这里的 2rem (约 32px) 就是左右卡片之间的空隙，可以根据需要改成 1.5rem 或 2.5rem */
}

/* 2. 确保在电脑大屏幕（lg）下左右分为两列 */
@media (min-width: 64rem) {
    .install-section .grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* 响应式调整 */
@media (max-width: 768px) {
    .install-header {
        flex-direction: column;
        align-items: flex-start;
    }
}


/* =========================================
   Fourth Part: Registration & Login 样式
   ========================================= */

.auth-section {
    background-color: var(--bg-black);
    padding-top: 2rem;
    padding-bottom: 5rem;
    color: #ffffff;
}

/* 标题样式 */
.auth-header {
    margin-bottom: 2rem;
}

.auth-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.auth-header p {
    color: #a1a1aa;
    font-size: 0.95rem;
}

/* 4列网格排版，显式添加 gap 确保间隔 */
.auth-grid {
    display: grid;
    grid-template-columns: repeat(1, minmax(0, 1fr));
    gap: 1.5rem; /* 确保卡片与卡片之间有间距 */
}

@media (min-width: 640px) {
    .auth-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1024px) {
    .auth-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

/* 基础卡片样式 */
.auth-card {
    background-color: rgba(18, 18, 18, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    height: 100%;
}

.auth-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 0.75rem;
}

.auth-card p {
    color: #a1a1aa;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* =========================================
   Fifth Part: Tips for New Players 样式
   ========================================= */

.tips-section {
    background-color: var(--bg-black);
    padding-top: 2rem;
    padding-bottom: 5rem;
    color: #ffffff;
}

/* 标题样式 (左侧带有微弱淡金色光影) */
.tips-header {
    margin-bottom: 2rem;
    position: relative;
}

.tips-header h2 {
    font-size: 2rem;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.tips-header::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -20px;
    width: 100px;
    height: 60px;
    background: radial-gradient(circle, rgba(234, 179, 8, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

/* 3 列网格排版，显式添加 gap 保证间距 */
.tips-grid {
    display: grid;
    grid-template-columns: repeat(1, minmax(0, 1fr));
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .tips-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1024px) {
    .tips-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

/* 基础卡片样式 */
.tip-card {
    background-color: rgba(18, 18, 18, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 1rem 1.75rem;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    height: 100%;
}

.tip-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 0.75rem;
}

.tip-card p {
    color: #a1a1aa;
    font-size: 0.9rem;
    line-height: 1.5;
}


/* =========================================
   Sixth Part: Customer Support 样式
   ========================================= */

.support-section {
    background-color: var(--bg-black);
    padding-top: 2rem;
    padding-bottom: 5rem;
    color: #ffffff;
}

.support-header {
    margin-bottom: 2rem;
}

.support-header h2 {
    font-size: 2rem;
    font-weight: 700;
}

/* 基础卡片样式 */
.support-card {
    border-radius: 16px;
    position: relative;
    overflow: hidden;
    min-height: 380px;
}

/* 左侧卡片 (深色圆角边框 + 微弱光晕装饰) */
.support-left {
    background-color: rgba(18, 18, 18, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 3rem 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    backdrop-filter: blur(10px);
}

.support-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: #ffffff;
}

.support-content p {
    color: #a1a1aa;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    max-width: 480px;
}

.support-buttons {
    display: flex;
    gap: 1rem;
}

/* 左侧卡片左上角金色线条微光 */
.support-left::before {
    content: '';
    position: absolute;
    top: -40px;
    left: -40px;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(234, 179, 8, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

/* 左侧卡片左下角扑克心形卡片弱光装饰 */
.support-left::after {
    content: '♥';
    position: absolute;
    bottom: 30px;
    left: 20px;
    width: 65px;
    height: 75px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(224, 50, 217, 0.2);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(224, 50, 217, 0.4);
    font-size: 1.5rem;
    transform: rotate(-10deg);
    pointer-events: none;
    box-shadow: 0 0 15px rgba(224, 50, 217, 0.1);
}

/* 右侧卡片 (紫色渐变背景与插图容器) */
.support-right {
    border: 1px solid rgba(224, 50, 217, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.support-right img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* =========================================
   Seventh Part: Call to Action Banner 样式
   ========================================= */

.cta-banner-section {
    background-color: var(--bg-black);
    padding-top: 2rem;
    padding-bottom: 5rem;
    color: #ffffff;
}

/* 鲜艳的亮粉紫渐变卡片 */
.cta-card {
    background: linear-gradient(135deg, #d932d9 0%, #e032b8 50%, #e6328c 100%);
    border-radius: 20px;
    padding: 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    box-shadow: 0 10px 30px rgba(224, 50, 217, 0.25);
}

/* 左侧文字与按钮 */
.cta-content {
    flex: 1;
    max-width: 680px;
}

.cta-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.cta-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* 专属黑色与白色按钮 */
.btn-dark {
    background-color: #000000;
    color: #ffffff;
    border: none;
    padding: 12px 24px;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: transform 0.2s, opacity 0.3s;
}

.btn-dark:hover {
    opacity: 0.85;
    transform: translateY(-2px);
}

.btn-light {
    background-color: #ffffff;
    color: #000000;
    border: none;
    padding: 12px 24px;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: transform 0.2s, opacity 0.3s;
}

.btn-light:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

/* 右侧二维码容器 */
.cta-qrcode {
    background-color: #ffffff;
    padding: 1rem;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    flex-shrink: 0;
}

.cta-qrcode img {
    width: 180px;
    height: 180px;
    object-fit: contain;
    display: block;
}

/* 响应式适配 */
@media (max-width: 992px) {
    .cta-card {
        flex-direction: column;
        text-align: center;
        padding: 2.5rem 1.5rem;
    }

    .cta-buttons {
        justify-content: center;
    }

    .cta-qrcode img {
        width: 150px;
        height: 150px;
    }
}

/* =========================================
   Eighth Part: Footer 样式
   ========================================= */

.site-footer {
    background-color: var(--bg-black);
    color: #a1a1aa;
    font-size: 0.9rem;
    padding-top: 4rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* 4 列布局 */
.footer-grid {
    display: grid;
    grid-template-columns: repeat(1, minmax(0, 1fr));
    gap: 2.5rem;
    padding-bottom: 3.5rem;
}

@media (min-width: 640px) {
    .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1.5fr 1fr 1fr 1fr;
    }
}

/* 第一列 Logo 与文案 */
.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.footer-brand .footer-logo img {
    height: 40px;
    width: auto;
}

.footer-brand .brand-name {
    font-size: 1.2rem;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: 0.5px;
}

.footer-brand .brand-desc {
    color: #a1a1aa;
    line-height: 1.6;
    max-width: 300px;
}

/* 链接列样式 */
.footer-col h4 {
    color: #ffffff;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links li a {
    color: #a1a1aa;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links li a:hover {
    color: var(--text-pink);
}

/* 版权底部细条 */
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 1.25rem 0;
    font-size: 0.85rem;
    color: #71717a;
}

/* =========================================
   Ninth Part: Mega888 2026 APK Guide (Full Article) 样式
   ========================================= */

.apk-guide-section {
    background-color: var(--bg-black);
    padding-top: 2rem;
    padding-bottom: 3rem;
    color: #ffffff;
}

.apk-guide-header {
    margin-bottom: 2rem;
}

.apk-guide-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.apk-guide-header p {
    color: #a1a1aa;
    font-size: 1rem;
    line-height: 1.7;
}

/* 内容区块卡片 */
.apk-guide-block {
    background-color: rgba(18, 18, 18, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
}

.apk-guide-block:last-child {
    margin-bottom: 0;
}

.apk-guide-block h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 1rem;
}

.apk-guide-block h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: #ffffff;
}

.apk-guide-block p {
    color: #d4d4d8;
    font-size: 0.98rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.apk-guide-block p:last-child {
    margin-bottom: 0;
}

.apk-guide-block a {
    color: var(--text-pink);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.apk-guide-block .bullet-list,
.apk-guide-block .step-list {
    margin-bottom: 1rem;
}

.apk-guide-block .step-list {
    padding-left: 1.25rem;
}

/* 安装流程图 (图片) */
.install-flow-image {
    background-color: rgba(18, 18, 18, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
}

.install-flow-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* 安装流程图 (HTML 版) */
.install-flow-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    background-color: rgba(18, 18, 18, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 1.5rem 1rem;
    margin-bottom: 1.5rem;
}

.install-flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.35rem;
    width: 257px;
    padding: 1rem 0.75rem;
    border-radius: 10px;
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.install-flow-step.is-final {
    background: linear-gradient(135deg, rgba(224, 50, 217, 0.18) 0%, rgba(153, 50, 217, 0.18) 100%);
    border-color: rgba(224, 50, 217, 0.4);
}

.install-flow-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background-color: rgba(0, 255, 136, 0.15);
    color: #00ff88;
    font-size: 0.85rem;
    font-weight: 700;
}

.install-flow-step.is-final .install-flow-num {
    background: var(--gradient-btn);
    color: #ffffff;
}

.install-flow-title {
    color: #ffffff;
    font-weight: 700;
    font-size: 0.95rem;
}

.install-flow-desc {
    color: #a1a1aa;
    font-size: 0.8rem;
    line-height: 1.4;
}

.install-flow-arrow {
    color: #52525b;
    font-size: 1.4rem;
    line-height: 1;
}

@media (max-width: 640px) {
    .install-flow-diagram {
        flex-direction: column;
    }

    .install-flow-step {
        width: 100%;
        max-width: 220px;
    }

    .install-flow-arrow {
        transform: rotate(90deg);
    }
}

/* APK 真假对比卡片 (HTML 版) */
.apk-compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.apk-compare-card {
    display: flex;
    flex-direction: column;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background-color: rgba(18, 18, 18, 0.4);
    overflow: hidden;
}

.apk-compare-card.is-genuine {
    border-color: rgba(0, 255, 136, 0.35);
    background-color: rgba(0, 255, 136, 0.06);
}

.apk-compare-card.is-fake {
    border-color: rgba(255, 77, 79, 0.35);
    background-color: rgba(255, 77, 79, 0.06);
}

.apk-compare-title {
    text-align: center;
    padding: 0.85rem 1rem;
    font-size: 1rem;
    font-weight: 700;
    color: #ffffff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.apk-compare-row {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.apk-compare-label {
    color: #a1a1aa;
    font-size: 0.78rem;
}

.apk-compare-value {
    color: #ffffff;
    font-weight: 600;
    font-size: 0.92rem;
}

.apk-compare-footer {
    margin-top: auto;
    text-align: center;
    padding: 0.75rem 1rem;
    font-weight: 700;
    font-size: 0.9rem;
}

.apk-compare-card.is-genuine .apk-compare-footer {
    color: #00ff88;
}

.apk-compare-card.is-fake .apk-compare-footer {
    color: #ff4d4f;
}

@media (max-width: 640px) {
    .apk-compare-grid {
        grid-template-columns: 1fr;
    }
}

/* 文件详情表格 */
.apk-table-wrapper {
    overflow-x: auto;
    margin-bottom: 1rem;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.apk-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.apk-table th,
.apk-table td {
    text-align: left;
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.apk-table th {
    color: #ffffff;
    font-weight: 700;
    background: rgba(255, 255, 255, 0.04);
}

.apk-table td {
    color: #d4d4d8;
}

.apk-table tr:last-child td {
    border-bottom: none;
}

/* FAQ 手风琴样式 */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.faq-item {
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    padding: 0.9rem 1.25rem;
    background: rgba(255, 255, 255, 0.02);
}

.faq-item summary {
    cursor: pointer;
    font-weight: 700;
    color: #ffffff;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    color: var(--text-pink);
    font-size: 1.2rem;
    margin-left: 1rem;
}

.faq-item[open] summary::after {
    content: '\2212';
}

.faq-item p {
    color: #a1a1aa;
    margin-top: 0.75rem;
    margin-bottom: 0;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* =========================================
   Subpage Banner & Content 区域样式
   ========================================= */

/* 子页面 Banner (矮条状，包含红紫微光渐变) */
.subpage-banner {
    background: linear-gradient(135deg, #4a0d33 0%, #20062a 40%, #10021c 70%, #000000 100%);
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
}

/* 渐变装饰效果 */
.subpage-banner::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at 80% 50%, rgba(153, 50, 217, 0.25) 0%, transparent 70%);
    pointer-events: none;
}

.subpage-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.subpage-breadcrumb {
    color: #a1a1aa;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

/* 子页面中间内容预留区 */
.subpage-content {
    background-color: var(--bg-black);
    min-height: 400px; /* 预留基础高度，避免没内容时 Footer 贴太近 */
}

/* =========================================
   Mobile Responsive (手机端整体适配)
   ========================================= */

@media (max-width: 767px) {

    /* Top Bar & Navbar */
    .top-bar {
        padding: 6px 4%;
        height: 32px;
        font-size: 0.7rem;
    }

    .top-bar .info {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .navbar {
        top: 32px;
        padding: 10px 4%;
        height: 64px;
    }

    body {
        padding-top: 96px;
    }

    .logo img {
        height: 48px;
    }

    .nav-actions {
        gap: 8px;
        margin-right: 12px;
    }

    .nav-actions .btn {
        padding: 8px 14px;
        font-size: 0.8rem;
    }

    /* Utility spacing */
    .py-8 {
        padding-block: calc(var(--spacing) * 10);
    }

    /* Hero Banner */
    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
        max-width: 100%;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
        gap: 12px;
    }

    .hero-buttons .btn {
        width: 100%;
        text-align: center;
    }

    .hero-image img {
        min-height: 220px;
    }

    /* Feature Cards */
    .feature-card {
        padding: 1.25rem 1.5rem;
    }

    .feature-card h2 {
        font-size: 1.25rem;
    }

    /* Section Headers (Install / Auth / Tips / Support) */
    .install-title h2,
    .auth-header h2,
    .tips-header h2,
    .support-header h2 {
        font-size: 1.5rem;
    }

    .install-tabs {
        width: 100%;
    }

    .tab-btn {
        flex: 1;
        text-align: center;
    }

    .install-buttons {
        flex-direction: column;
    }

    .install-buttons .btn {
        width: 100%;
        text-align: center;
    }

    /* Support Section */
    .support-card {
        min-height: auto;
    }

    .support-left {
        padding: 2rem 1.5rem;
    }

    .support-content h3 {
        font-size: 1.25rem;
    }

    .support-buttons {
        flex-direction: column;
    }

    .support-buttons .btn {
        width: 100%;
        text-align: center;
    }

    .support-right {
        min-height: 220px;
    }

    /* CTA Banner */
    .cta-card {
        padding: 2rem 1.5rem;
    }

    .cta-content h2 {
        font-size: 1.5rem;
    }

    .cta-content p {
        font-size: 0.9rem;
    }

    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }

    .cta-buttons button {
        width: 100%;
    }

    .cta-qrcode img {
        width: 130px;
        height: 130px;
    }

    /* Footer */
    .footer-grid {
        gap: 2rem;
        padding-bottom: 2.5rem;
    }

    .footer-brand .brand-desc {
        max-width: 100%;
    }

    /* Subpage Banner */
    .subpage-banner {
        padding-top: 2rem;
        padding-bottom: 2rem;
    }

    .subpage-title {
        font-size: 1.6rem;
    }

    .subpage-breadcrumb {
        font-size: 0.75rem;
    }

    /* APK Guide / Article Blocks */
    .apk-guide-header h2 {
        font-size: 1.5rem;
    }

    .apk-guide-block {
        padding: 1.25rem 1.25rem;
        margin-bottom: 1.25rem;
    }

    .apk-guide-block h3 {
        font-size: 1.15rem;
    }

    .apk-guide-block h4 {
        font-size: 1rem;
    }

    .apk-guide-block p {
        font-size: 0.92rem;
    }

    /* Table (scrolls horizontally, just tighten padding/text) */
    .apk-table th,
    .apk-table td {
        padding: 0.6rem 0.85rem;
        font-size: 0.85rem;
    }

    /* FAQ */
    .faq-item {
        padding: 0.75rem 1rem;
    }
}

@media (max-width: 480px) {

    .top-bar .info {
        font-size: 0.65rem;
    }

    .logo img {
        height: 40px;
    }

    .nav-actions .btn {
        padding: 7px 10px;
        font-size: 0.75rem;
    }

    .hero-content h1 {
        font-size: 1.7rem;
    }

    .trust-badge {
        font-size: 0.7rem;
    }

    .feature-card,
    .auth-card,
    .tip-card {
        padding: 1rem 1.25rem;
    }

    .cta-content h2 {
        font-size: 1.3rem;
    }

    .cta-qrcode img {
        width: 110px;
        height: 110px;
    }

    .subpage-title {
        font-size: 1.4rem;
    }

    .apk-guide-block {
        padding: 1rem;
    }
}