/* 全局重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    transition: all 0.3s ease;
    overflow-x: hidden;
}

body.dark-mode {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

/* 粒子背景 */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.particle {
    position: absolute;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: float 6s infinite ease-in-out;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) translateX(0px); opacity: 0; }
    50% { transform: translateY(-100px) translateX(20px); opacity: 0.8; }
}

/* 主题切换按钮 */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: rotate(90deg) scale(1.1);
    background: rgba(255, 255, 255, 0.3);
}

/* 主容器 */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
    position: relative;
    z-index: 1;
}

/* 头像容器 */
.avatar-container {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

.avatar {
    position: relative;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 4px solid rgba(255, 255, 255, 0.5);
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    animation: pulse 2s infinite;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.online-status {
    position: absolute;
    bottom: 5px;
    right: 5px;
    width: 20px;
    height: 20px;
    background: #4CAF50;
    border: 3px solid #fff;
    border-radius: 50%;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* 信息卡片 */
.info-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    min-height: 60px;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 30px;
    min-height: 30px;
}

/* 信息网格 */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.info-item {
    background: rgba(255, 255, 255, 0.15);
    padding: 15px;
    border-radius: 10px;
    transition: transform 0.3s ease;
}

.info-item:hover {
    transform: translateY(-5px);
}

.label {
    display: block;
    font-size: 0.9rem;
    opacity: 0.8;
    margin-bottom: 5px;
}

.value {
    display: block;
    font-weight: bold;
    font-size: 1.1rem;
}

.bio {
    line-height: 1.8;
    font-size: 1.1rem;
    opacity: 0.95;
}

/* 社交链接 */
.social-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin: 30px 0;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 25px;
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 25px;
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.social-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.icon {
    font-size: 1.3rem;
}

/* 留言板 */
.message-board {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    margin-top: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.message-board h2 {
    text-align: center;
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.message-input-area {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
}

textarea, input[type="text"] {
    width: 100%;
    padding: 15px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1rem;
    resize: vertical;
    transition: all 0.3s ease;
}

textarea:focus, input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.15);
}

textarea::placeholder, input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.submit-btn {
    padding: 12px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 25px;
    color: white;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.messages-list {
    max-height: 400px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message-item {
    background: rgba(255, 255, 255, 0.15);
    padding: 15px;
    border-radius: 10px;
    border-left: 4px solid rgba(255, 255, 255, 0.5);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-author {
    font-weight: bold;
    margin-bottom: 5px;
    color: #ffcc00;
}

.message-text {
    line-height: 1.6;
    word-wrap: break-word;
}

.message-date {
    font-size: 0.8rem;
    opacity: 0.7;
    margin-top: 8px;
    text-align: right;
}

.delete-btn {
    background: transparent;
    border: 1px solid rgba(255, 0, 0, 0.3);
    color: rgba(255, 0, 0, 0.7);
    padding: 3px 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.8rem;
    margin-left: 10px;
    transition: all 0.3s ease;
}

.delete-btn:hover {
    background: rgba(255, 0, 0, 0.2);
    color: white;
}

/* 页脚 */
footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    opacity: 0.8;
}

.copyright {
    margin-top: 10px;
    font-size: 0.9rem;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 20px 15px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .social-links {
        flex-direction: column;
        align-items: center;
    }
    
    .social-btn {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .avatar {
        width: 120px;
        height: 120px;
    }
}