/* --- 变量定义 --- */
:root {
    --bg-color: #F2F3F5;
    --card-bg: #FFFFFF;
    --text-primary: #1F1F1F;
    --text-secondary: #86909C;
    --accent-color: #007DFF;
    --success-color: #00B578;
    --border-color: rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #121212;
        --card-bg: #1E1E1E;
        --text-primary: #E5E6EB;
        --text-secondary: #86909C;
        --accent-color: #0A84FF;
        --border-color: rgba(255, 255, 255, 0.08);
        --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
        --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    }
}

/* --- 基础样式 --- */
body {
    font-family: -apple-system, HarmonyOS Sans, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    margin: 0;
    padding: 20px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 600px;
    margin: 0 auto;
}

/* --- 头部动画 --- */
header {
    text-align: center;
    margin-bottom: 32px;
}

.fade-in-down {
    animation: fadeInDown 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.logo-container {
    width: 180px;
    height: 180px;
    margin: 0 auto 16px;
    border-radius: 20px;
    background: var(--card-bg);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    /* 控制 fallback 图标大小 */
    color: var(--accent-color);
}

.logo-fallback {
    display: none;
    /* 默认隐藏，JS 控制显示 */
}

.logo-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}

/* 渐变标题 */
.gradient-text {
    background: linear-gradient(120deg, var(--accent-color), #8A2BE2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 43px;
    font-weight: 800;
    margin: 0;
}

.version-tag {
    display: inline-block;
    background: rgba(0, 125, 255, 0.1);
    color: var(--accent-color);
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 10px;
    margin-top: 14px;
    font-weight: 500;
}

/* --- 卡片样式 --- */
.section-title {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 600;
    margin: 24px 4px 12px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* 列表小图标 */
.li-icon {
    font-size: 10px;
    color: var(--accent-color);
    margin-right: 6px;
    opacity: 0.7;
}

/* 按钮图标间距 */
.action-btn i {
    margin-right: 8px;
}

/* 链接箭头 */
.link-btn .arrow {
    margin-left: 6px;
    font-size: 12px;
    transition: transform 0.2s;
}

.link-btn:active .arrow {
    transform: translateX(4px);
}

.card:active {
    transform: scale(0.98);
}

.card-header {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
}

.card-icon {
    font-size: 18px;
    /* 图标大小 */
    margin-right: 12px;
    width: 36px;
    height: 36px;
    background: rgba(128, 128, 128, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    /* 统一图标颜色 */
}

.card-title {
    font-size: 16px;
    font-weight: 600;
}

.card-content {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 列表样式 */
.feature-list {
    margin: 0;
    padding-left: 20px;
}

.feature-list li {
    margin-bottom: 6px;
}

/* --- 交互组件 --- */
.action-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 12px;
    width: 100%;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    margin-top: 16px;
    position: relative;
    overflow: hidden;
}

/* 按钮波纹效果 */
.ripple:after {
    content: "";
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    background-image: radial-gradient(circle, #fff 10%, transparent 10.01%);
    background-repeat: no-repeat;
    background-position: 50%;
    transform: scale(10, 10);
    opacity: 0;
    transition: transform .5s, opacity 1s;
}

.ripple:active:after {
    transform: scale(0, 0);
    opacity: 0.2;
    transition: 0s;
}

/* 状态显示区 */
.status-hidden {
    height: 0;
    opacity: 0;
    overflow: hidden;
    transition: all 0.4s ease;
}

.status-show {
    height: auto;
    opacity: 1;
    margin-top: 12px;
    padding: 12px;
    background: rgba(0, 181, 120, 0.1);
    border-radius: 8px;
    color: var(--success-color);
    font-size: 13px;
    display: flex;
    align-items: center;
}

/* 图片容器 */
.image-test-box {
    margin-top: 12px;
    border: 1px dashed var(--border-color);
    border-radius: 12px;
    padding: 12px;
    text-align: center;
}

.image-test-box img {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.img-caption {
    font-size: 12px;
    margin-top: 8px;
    font-family: monospace;
    color: var(--accent-color);
    background: rgba(0, 125, 255, 0.05);
    display: inline-block;
    padding: 2px 6px;
    border-radius: 4px;
}

/* 链接按钮 */
.link-btn {
    display: flex;
    align-items: center;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    margin-top: 12px;
    transition: opacity 0.2s;
}

.link-btn .arrow {
    margin-left: 6px;
    transition: transform 0.2s;
}

.link-btn:active {
    opacity: 0.7;
}

.link-btn:active .arrow {
    transform: translateX(4px);
}

/* --- 新增：导航网格系统 (Grid Layout) --- */
.nav-grid {
display: grid;
grid-template-columns: repeat(2, 1fr); /* 两列布局 */
gap: 16px;
margin-bottom: 32px;
}

.nav-card {
background: var(--card-bg);
border-radius: 20px;
padding: 24px 16px;
text-align: center;
text-decoration: none; /* 去除下划线 */
color: var(--text-primary);
box-shadow: var(--shadow-sm);
border: 1px solid var(--border-color);
transition: all 0.2s ease;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
}

.nav-card:active {
transform: scale(0.96);
background-color: rgba(128, 128, 128, 0.05);
}

.nav-icon {
font-size: 32px;
margin-bottom: 12px;
color: var(--accent-color);
}

.nav-title {
font-size: 15px;
font-weight: 600;
}

.nav-desc {
font-size: 12px;
color: var(--text-secondary);
margin-top: 4px;
}

/* --- 新增：子页面头部 --- */
.page-header {
display: flex;
align-items: center;
margin-bottom: 24px;
}

.back-btn {
text-decoration: none;
color: var(--accent-color);
font-size: 16px;
font-weight: 600;
display: flex;
align-items: center;
padding: 8px 16px 8px 0;
}

.page-title {
font-size: 20px;
font-weight: 700;
margin-left: auto;
margin-right: auto;
transform: translateX(-16px); /* 视觉居中修正 */
}

/* --- 新增：功能列表样式 --- */
.feature-item {
display: flex;
align-items: flex-start;
padding: 16px 0;
border-bottom: 1px solid var(--border-color);
}
.feature-item:last-child { border-bottom: none; }

.feature-icon-box {
width: 40px;
height: 40px;
border-radius: 12px;
background: rgba(0, 125, 255, 0.1);
color: var(--accent-color);
display: flex;
align-items: center;
justify-content: center;
font-size: 18px;
margin-right: 16px;
flex-shrink: 0;
}

.feature-text h3 { margin: 0 0 4px 0; font-size: 16px; }
.feature-text p { margin: 0; font-size: 13px; color: var(--text-secondary); }

/* 底部 */
footer {
    text-align: center;
    margin-top: 40px;
    font-size: 12px;
    color: var(--text-secondary);
    opacity: 0.6;
}

/* --- 入场动画 --- */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 交错动画逻辑：JS会控制添加 active 类，或者直接用 css delay */
.stagger-anim {
    opacity: 0;
    animation: fadeInUp 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.stagger-anim:nth-child(1) {
    animation-delay: 0.1s;
}

.stagger-anim:nth-child(2) {
    animation-delay: 0.2s;
}

.stagger-anim:nth-child(3) {
    animation-delay: 0.3s;
}

.stagger-anim:nth-child(4) {
    animation-delay: 0.4s;
}

/* --- 新增：优雅的图片容器与占位符 --- */
.img-box {
margin: 24px 0;
border-radius: 16px;
overflow: hidden;
box-shadow: var(--shadow-md);
background-color: var(--card-bg);
border: 1px solid var(--border-color);
position: relative;
/* 默认高度，放入真实图片后可由图片撑开 */
min-height: 500px;
display: flex;
align-items: center;
justify-content: center;
}

/* 真实图片样式 */
.img-box img {
width: 100%;
height: auto;
display: block;
object-fit: cover;
}

/* 占位提示文字 */
.img-placeholder-text {
position: absolute;
color: var(--text-secondary);
font-size: 14px;
display: flex;
flex-direction: column;
align-items: center;
gap: 8px;
padding: 20px;
text-align: center;
border: 2px dashed var(--border-color);
border-radius: 12px;
width: 80%;
height: 80%;
justify-content: center;
}

/* --- 新增：滚动动画 (Scroll Reveal) --- */
.scroll-anim {
opacity: 0;
transform: translateY(30px) scale(0.98);
transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1); /* Apple 常用贝塞尔曲线 */
}

.scroll-visible {
opacity: 1;
transform: translateY(0) scale(1);
}

/* --- 新增：PPT 幻灯片组件 (Carousel) --- */
.slider-container {
position: relative;
overflow: hidden;
border-radius: 20px;
background: var(--card-bg);
box-shadow: var(--shadow-md);
margin: 24px 0;
/* 1. [新增] 最小高度，防止在窄屏手机上内容溢出 */
min-height: 260px;
display: flex;
align-items: center; /* 垂直居中 */
}

.slide {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
opacity: 0;
transform: translateX(30px); /* 稍微增加位移感 */
transition: all 0.6s cubic-bezier(0.25, 1, 0.5, 1); /* 更柔和的动效 */
padding: 24px 32px 32px 30px; /* 增加内边距 */
box-sizing: border-box;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
text-align: center;
pointer-events: none;
}

/* [新增] 专门用于截图展示的 Slide 内容样式 */
.slide-screenshot-placeholder {
width: 100%;
height: 100%;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
border: 2px dashed var(--border-color);
border-radius: 12px;
padding: 20px;
background: rgba(128, 128, 128, 0.02);
}

.slide.active {
opacity: 1;
transform: translateX(0);
pointer-events: all;
z-index: 2;
}

.slide-icon {
font-size: 48px;
margin-bottom: 16px 16px 16px 0px;
color: var(--accent-color);
}

.slide-content h3 { font-size: 18px; margin-bottom: 8px; }
.slide-content p { font-size: 14px; color: var(--text-secondary); }

/* 幻灯片指示器 */
.slider-dots {
position: absolute;
bottom: 16px;
left: 0;
width: 100%;
display: flex;
justify-content: center;
gap: 8px;
z-index: 3;
}

.dot {
width: 8px;
height: 8px;
border-radius: 50%;
background: rgba(128, 128, 128, 0.3);
transition: all 0.3s;
}

.dot.active {
background: var(--accent-color);
width: 24px;
border-radius: 4px;
}

/* 点击切换的热区覆盖 */
.slider-click-area {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
z-index: 10;
cursor: pointer;
}

/* --- 截图轮播图专用样式 --- */

/* 1. 容器高度控制：设置为视口高度的 65%，既能看清图，又不会太长 */
.screenshot-slider {
height: 65vh;
min-height: 400px;
max-height: 600px;
background-color: var(--bg-color); /* 与背景融合，不显示卡片白底 */
box-shadow: none; /* 去掉外层阴影，让图片自己发光 */
border: none;
}

/* 2. 截图包装器 */
.screenshot-wrapper {
width: 100%;
height: 100%;
position: relative;
display: flex;
justify-content: center;
align-items: center;
overflow: hidden;
}

/* 3. 图片样式：核心 */
.screenshot-img {
height: 90%; /* 留出一点上下边距 */
width: auto;
max-width: 90%;
object-fit: contain; /* 保持比例，完整显示 */
border-radius: 16px; /* 模拟手机圆角 */

/* 强烈的阴影，营造悬浮感 */
box-shadow: 0 20px 40px -10px rgba(0,0,0,0.3);

/* 稍微加一点边框，模拟手机边框 */
border: 4px solid #333;
/* [新增] 设置变换原点为顶部中心，确保放大时顶部不动 */
transform-origin: top center;
/* [新增] 添加一个平滑过渡，当滑块滑出时图片能平滑复位 */
transition: transform 1.2s cubic-bezier(0.25, 1, 0.5, 1);
}

/* =========================================
   4. 悬浮文字卡片 (Floating Badge) - 终极修复版
   请将此段代码放在 CSS 文件的最末尾
   ========================================= */

/* --- 1. 默认容器样式（对应浅色模式 Light Mode） --- */
.floating-badge {
position: absolute;
bottom: 30px;
left: 50%;
transform: translateX(-50%);

/* 关键：默认背景设为白色，文字设为深灰 */
background: rgba(255, 255, 255, 0.85);
color: #24292e;

/* 边框和阴影 */
border: 1px solid rgba(0, 0, 0, 0.1);
box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);

/* 布局与特效 */
backdrop-filter: blur(12px);
-webkit-backdrop-filter: blur(12px);
padding: 12px 20px;
border-radius: 30px;
display: flex;
align-items: center;
gap: 12px;
min-width: 200px;
z-index: 10;
transition: all 0.3s ease;
}

/* --- 2. 内部文字样式（使用 inherit 自动跟随） --- */
.badge-text {
text-align: left;
display: flex;
flex-direction: column;
}

.badge-title {
/* 关键：不要写死颜色，使用 inherit 跟随父级 */
color: inherit;
font-size: 14px;
font-weight: 600;
line-height: 1.2;
}

.badge-desc {
/* 关键：使用 inherit + opacity */
color: inherit;
opacity: 0.7;
font-size: 11px;
margin-top: 2px;
}

/* --- 3. 深色模式适配 (Dark Mode) --- */
@media (prefers-color-scheme: dark) {
.floating-badge {
/* 深色模式下：背景变黑，文字变亮灰 */
background: rgba(30, 30, 30, 0.85);
color: #c9d1d9;

border: 1px solid rgba(255, 255, 255, 0.1);
box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}
}

/* 占位图背景 (没有真实截图时显示) */
.placeholder-img-bg {
width: 260px;
height: 460px;
background: var(--card-bg);
border-radius: 16px;
border: 2px dashed var(--border-color);
display: flex;
align-items: center;
justify-content: center;
}

/* 简单的入场动画 */
.fade-in-up {
animation: fadeInUpBadge 0.6s ease forwards;
}

@keyframes fadeInUpBadge {
from { opacity: 0; transform: translate(-50%, 20px); }
to { opacity: 1; transform: translate(-50%, 0); }
}

/* 深色模式微调 */
@media (prefers-color-scheme: dark) {
.screenshot-img {
border-color: #000; /* 深色模式下边框更黑 */
box-shadow: 0 20px 40px -10px rgba(0,0,0,0.6);
}
}

/* =========================================
   新增：截图聚焦动画
   ========================================= */

/* 1. 定义动画关键帧 */
@keyframes zoomInTop {
/* 0% 到 25%：等待阶段，保持完整显示 */
0%, 10% {
transform: scale(1) translateY(0);
}
/* 100%：放大并上移阶段，聚焦顶部 */
85% {
/* 放大 1.8 倍，并向上移动 0px，根据实际效果微调 */
transform: scale(1.4) translateY(0px);
}
}

@keyframes zoomOut {
/* 0% 到 25%：等待阶段，保持完整显示 */
0% {
transform: scale(1) translateY(0);
}
/* 100%：放大并上移阶段，聚焦顶部 */
99% {
/* 根据实际效果微调 */
transform: scale(0.625) translateY(0px);
}
}

/* 3. 激活状态下应用动画 */
.slide.active .screenshot-img {
/* 应用 zoomInTop 动画
       时长: 6s (比轮播间隔稍长，确保动画能播放完)
       缓动: 使用苹果风格的平滑曲线
       模式: forwards (动画结束后停留在最终放大状态)
    */
animation: zoomInTop 5.5s cubic-bezier(0.25, 1, 0.5, 1) forwards;
/*animation: zoomOut 0.5s cubic-bezier(0.25, 1, 0.5, 1) forwards;*/
}