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

:root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2c2c2c;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --accent-color: #3498db;
    --accent-hover: #2980b9;
    --border-color: #404040;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

header {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
    display: flex;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--accent-color);
}

.logo-svg {
    margin-right: 0.5rem;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 1.5rem;
}

nav ul li a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: var(--accent-color);
    text-decoration: none;
}

.hero {
    text-align: center;
    padding: 3rem 1rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.steps {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.steps h2 {
    margin-bottom: 1.5rem;
    text-align: center;
    color: var(--text-primary);
}

.step {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.step h3 {
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.step p {
    color: var(--text-secondary);
}

.step-icon {
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
}

.btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--text-primary);
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s;
    border: 1px solid transparent;
}

.btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.info-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
    border-top: 1px solid var(--border-color);
}

.info-section h2 {
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.info-section p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.info-section img {
    max-width: 100%;
    height: auto;
    margin: 1rem 0;
    display: block;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.faq h3 {
    color: var(--text-primary);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.faq p {
    color: var(--text-secondary);
}

footer {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    text-align: center;
    padding: 1.5rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
}

footer a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s;
}

footer a:hover {
    color: var(--accent-hover);
}

#test-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: black;
    display: none;
    z-index: 1000;
    cursor: pointer;
}

.controls {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.8);
    padding: 10px 20px;
    border-radius: 8px;
    color: var(--text-primary);
    display: none;
    z-index: 1001;
    backdrop-filter: blur(5px);
    border: 1px solid var(--border-color);
}

.breadcrumb {
    background-color: var(--bg-secondary);
    padding: 0.5rem 1rem;
    margin: 0;
    list-style: none;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb li {
    display: inline;
    color: var(--text-secondary);
}

.breadcrumb li + li:before {
    content: ">";
    padding: 0 8px;
    color: var(--text-secondary);
}

.breadcrumb a {
    color: var(--accent-color);
    text-decoration: none;
}

.breadcrumb a:hover {
    color: var(--accent-hover);
}

mark {
    background-color: var(--accent-color);
    color: var(--text-primary);
    padding: 0 4px;
    border-radius: 3px;
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
    }
    
    nav ul {
        margin-top: 1rem;
    }
    
    nav ul li {
        margin-left: 1rem;
        margin-right: 1rem;
    }
    
    .buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .step {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .image-grid {
        grid-template-columns: 1fr;
    }
}

.hero-bg {
    background: linear-gradient(rgba(26, 26, 26, 0.8), rgba(26, 26, 26, 0.9));
    background-size: cover;
    background-position: center;
    position: relative;
    padding: 5rem 1rem;
}

.hero-content {
    position: relative;
    z-index: 2;
}

/* 图片容器相关样式 */
.image-container {
    margin: 2rem 0;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

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

.image-caption {
    padding: 0.8rem;
    color: var(--text-secondary);
    font-style: italic;
    font-size: 0.9rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

/* 图片网格 */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.image-item {
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

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

/* 设备兼容性容器 */
.devices-container {
    border-radius: 8px;
    overflow: hidden;
    margin: 1.5rem 0;
    border: 1px solid var(--border-color);
}

/* 添加退出按钮样式 */
.exit-btn {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    padding: 8px 15px;
    margin-left: 15px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s;
}

.exit-btn:hover, .exit-btn:active {
    background-color: rgba(255, 255, 255, 0.3);
}

/* 优化移动端控制栏样式 */
@media (max-width: 768px) {
    .controls {
        flex-direction: column;
        align-items: center;
        gap: 10px;
        padding: 15px;
        width: 90%;
    }
    
    .exit-btn {
        margin-left: 0;
        width: 100%;
        padding: 12px;
        font-size: 16px;
    }
}