/* 全局样式和移动端优先设计 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* iOS 安全区域支持 */
@supports (padding-top: env(safe-area-inset-top)) {
    body {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    min-height: calc(100vh - 40px);
}

/* 头部样式 - 移动端优化 */
header {
    text-align: center;
    padding: max(20px, env(safe-area-inset-top)) 20px 30px;
    color: white;
    position: relative;
    z-index: 10;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    font-weight: 700;
}

header p {
    font-size: 1.1em;
    opacity: 0.9;
    margin-top: 10px;
}

/* 导航样式 - 移动端折叠菜单 */
nav {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 15px;
    margin: 20px 0;
    position: sticky;
    top: calc(env(safe-area-inset-top) + 10px);
    z-index: 100;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* 导航在滚动时的可见性增强 */
nav.scrolled {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(15px);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.15);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
    font-size: 0.9em;
    white-space: nowrap;
    font-weight: 500;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

nav a:hover,
nav a.active {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

/* 主要内容区域 - 修复重叠问题 */
main {
    background: white;
    border-radius: 20px;
    padding: 25px;
    margin: 20px 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    position: relative;
    z-index: 1;
}

.section {
    margin-bottom: 35px;
    padding: 20px 0;
    border-bottom: 1px solid #eee;
    position: relative;
}

.section:last-child {
    border-bottom: none;
}

.section h2 {
    color: #4a5568;
    margin-bottom: 20px;
    font-size: 1.6em;
    font-weight: 600;
    text-align: center;
}

/* 特性展示 - 移动端优化 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 15px;
    margin: 25px 0;
}

.feature {
    background: #f7fafc;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
    position: relative;
}

.feature:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.feature h3 {
    color: #3182ce;
    margin-bottom: 12px;
    font-size: 1.1em;
    font-weight: 600;
}

.feature p {
    color: #666;
    line-height: 1.5;
    font-size: 0.9em;
}

/* API 接口展示 - 修复布局 */
.api-endpoints {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 12px;
    margin: 20px 0;
}

.endpoint {
    background: #edf2f7;
    padding: 12px;
    border-radius: 8px;
    border-left: 3px solid #3182ce;
    transition: all 0.3s ease;
    position: relative;
}

.endpoint:hover {
    transform: translateX(5px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.endpoint code {
    display: block;
    background: #2d3748;
    color: #e2e8f0;
    padding: 8px 10px;
    border-radius: 4px;
    margin-bottom: 8px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    font-size: 0.85em;
    word-break: break-all;
}

.endpoint p {
    color: #4a5568;
    font-size: 0.85em;
    margin: 5px 0;
}

/* 按钮样式 - 移动端友好 */
button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 0.95em;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 8px 0;
    min-width: 120px;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

button:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(102, 126, 234, 0.3);
}

/* 页脚 - 移动端优化 */
footer {
    text-align: center;
    padding: 20px 0;
    color: white;
    opacity: 0.8;
    margin-top: 30px;
    position: relative;
    z-index: 1;
}

footer p {
    font-size: 0.9em;
    margin: 5px 0;
}

/* 通知系统样式 */
.notification {
    position: fixed;
    top: calc(env(safe-area-inset-top) + 20px);
    right: 20px;
    padding: 12px 16px;
    border-radius: 6px;
    color: white;
    font-weight: 500;
    font-size: 0.9em;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
    backdrop-filter: blur(10px);
    max-width: 280px;
    word-wrap: break-word;
}

.notification.success { background: rgba(72, 187, 120, 0.9); }
.notification.warning { background: rgba(237, 137, 54, 0.9); }
.notification.error { background: rgba(245, 101, 101, 0.9); }
.notification.info { background: rgba(49, 130, 206, 0.9); }

/* 响应式设计 - 移动端优先 */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }

    header {
        padding: max(15px, env(safe-area-inset-top)) 15px 25px;
    }

    header h1 {
        font-size: 2em;
        line-height: 1.2;
    }

    header p {
        font-size: 1em;
    }

    nav {
        margin: 15px 0;
        padding: 12px;
        background: rgba(255, 255, 255, 0.25) !important;
        backdrop-filter: blur(15px) !important;
        border: 1px solid rgba(255, 255, 255, 0.3) !important;
        box-shadow: 0 6px 25px rgba(0, 0, 0, 0.15) !important;
    }

    nav ul {
        flex-direction: column;
        gap: 6px;
    }

    nav a {
        padding: 8px 12px;
        font-size: 0.85em;
        text-align: center;
        background: rgba(255, 255, 255, 0.15);
        border: 1px solid rgba(255, 255, 255, 0.2);
        font-weight: 600;
    }

    main {
        padding: 20px;
        margin: 15px 0;
    }

    .section {
        margin-bottom: 30px;
        padding: 15px 0;
    }

    .section h2 {
        font-size: 1.4em;
        margin-bottom: 15px;
    }

    .features,
    .api-endpoints {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .feature {
        padding: 16px;
        margin: 4px 0;
    }

    .feature h3 {
        font-size: 1em;
        margin-bottom: 10px;
    }

    .endpoint {
        padding: 10px;
        margin: 2px 0;
    }

    .endpoint code {
        font-size: 0.8em;
        padding: 6px 8px;
    }

    button {
        width: 100%;
        margin: 5px 0;
        padding: 12px;
        font-size: 1em;
    }

    .notification {
        top: calc(env(safe-area-inset-top) + 10px);
        left: 10px;
        right: 10px;
        max-width: none;
        text-align: center;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.8em;
    }

    .section h2 {
        font-size: 1.2em;
    }

    .feature h3 {
        font-size: 0.95em;
    }

    .endpoint code {
        font-size: 0.75em;
    }

    footer {
        padding: 15px 0;
        margin-top: 20px;
    }
}

/* iPad 和中等屏幕适配 */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }

    .features {
        grid-template-columns: repeat(2, 1fr);
    }

    .api-endpoints {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 动画效果 - 性能优化 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section {
    animation: fadeIn 0.6s ease-out;
}

/* 减少动画偏好设置 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 加载效果 */
.loading {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #3182ce;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 滚动行为优化 */
html {
    scroll-behavior: smooth;
}

/* 防止内容溢出 */
.section {
    overflow-x: hidden;
}

.endpoint code {
    overflow-wrap: break-word;
    word-break: break-word;
}