/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

/* 页面切换 */
.page {
    display: none;
}

.page.active {
    display: block;
}

/* 落地页样式 */
.landing-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.hero-section {
    text-align: center;
    margin-bottom: 60px;
    animation: fadeInUp 1s ease-out;
}

.main-title {
    font-size: 3.5em;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.subtitle {
    font-size: 1.5em;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta-button {
    padding: 18px 48px;
    font-size: 1.2em;
    border: none;
    border-radius: 50px;
    background: white;
    color: #667eea;
    cursor: pointer;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    max-width: 900px;
    width: 100%;
}

.feature-card {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.2);
}

.feature-icon {
    font-size: 3em;
    margin-bottom: 15px;
}

.feature-card h3 {
    margin-bottom: 10px;
    font-size: 1.3em;
}

/* 应用容器样式 */
.app-container {
    min-height: 100vh;
    background: white;
    max-width: 768px;
    margin: 0 auto;
    position: relative;
}

/* 顶部导航 */
.top-nav {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-title {
    font-size: 1.3em;
    font-weight: bold;
}

.back-btn {
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.back-btn:hover {
    background: rgba(255,255,255,0.3);
}

/* 主要内容区 */
.main-content {
    padding: 20px;
    padding-bottom: 80px;
}

.welcome-section {
    text-align: center;
    margin-bottom: 30px;
    animation: fadeIn 0.5s ease-out;
}

.welcome-section h2 {
    color: #667eea;
    margin-bottom: 10px;
    font-size: 2em;
}

.welcome-section p {
    color: #666;
    font-size: 1.1em;
}

/* 技能卡片 */
.skills-section {
    margin-bottom: 30px;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 15px;
}

.skill-card {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

.skill-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.skill-name {
    font-size: 1.2em;
    font-weight: bold;
    color: #333;
}

.skill-level {
    background: #667eea;
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.9em;
}

.skill-desc {
    color: #666;
    margin-bottom: 10px;
}

.skill-progress {
    background: #e0e0e0;
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar {
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    height: 100%;
    transition: width 0.5s ease;
}

/* 快捷操作 */
.quick-actions {
    margin-bottom: 30px;
}

.quick-actions h3 {
    margin-bottom: 15px;
    color: #333;
    font-size: 1.4em;
}

.action-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.action-btn {
    background: white;
    border: 2px solid #667eea;
    color: #667eea;
    padding: 20px;
    border-radius: 15px;
    font-size: 1.1em;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.action-btn:hover {
    background: #667eea;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.action-btn span {
    font-size: 2em;
}

/* 底部导航 */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    box-shadow: 0 -2px 20px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-around;
    padding: 10px 0;
    max-width: 768px;
    margin: 0 auto;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px;
    border: none;
    background: none;
    cursor: pointer;
    color: #999;
    transition: all 0.3s ease;
}

.nav-item.active {
    color: #667eea;
}

.nav-item span:first-child {
    font-size: 1.5em;
}

.nav-item span:last-child {
    font-size: 0.8em;
}

/* 搜索栏 */
.search-bar {
    margin-bottom: 20px;
}

.search-bar input {
    width: 100%;
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 25px;
    font-size: 1em;
    transition: all 0.3s ease;
}

.search-bar input:focus {
    border-color: #667eea;
    outline: none;
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.2);
}

/* 内容网格 */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.content-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.content-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

.content-image {
    width: 100%;
    height: 150px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3em;
}

.content-info {
    padding: 15px;
}

.content-title {
    font-size: 1.2em;
    font-weight: bold;
    margin-bottom: 8px;
    color: #333;
}

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

/* 个人空间 */
.user-profile {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 20px;
    margin-bottom: 30px;
}

.avatar {
    font-size: 4em;
    margin-bottom: 15px;
}

.user-profile h2 {
    font-size: 2em;
    margin-bottom: 10px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.stat-value {
    font-size: 2.5em;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 5px;
}

.stat-label {
    color: #666;
    font-size: 0.9em;
}

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-title {
        font-size: 2.5em;
    }

    .subtitle {
        font-size: 1.2em;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .action-buttons {
        grid-template-columns: 1fr;
    }
}

/* 法律链接样式 */
.legal-links {
    margin-top: 30px;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.legal-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.9em;
    transition: all 0.3s ease;
}

.legal-link:hover {
    color: white;
    text-decoration: underline;
}

.separator {
    color: rgba(255, 255, 255, 0.5);
}

/* 认证按钮 */
.auth-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

.auth-btn {
    padding: 12px 30px;
    border: 2px solid white;
    background: transparent;
    color: white;
    font-size: 1em;
    font-weight: bold;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.auth-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.auth-btn.primary {
    background: white;
    color: #667eea;
}

.auth-btn.primary:hover {
    background: #f0f0ff;
    transform: translateY(-2px);
}

/* 页脚法律链接 */
.footer-legal {
    text-align: center;
    padding: 20px;
    background: #f5f5f5;
    font-size: 0.85em;
}

.footer-link {
    color: #666;
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-link:hover {
    color: #667eea;
    text-decoration: underline;
}

.footer-separator {
    color: #999;
    margin: 0 10px;
}