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

:root {
    --bg-color: #0f0f0f;
    --wave-color-1: rgba(102, 126, 234, 0.15);
    --wave-color-2: rgba(118, 75, 162, 0.12);
    --wave-color-3: rgba(80, 60, 120, 0.08);
    --text-color: #ffffff;
    --text-secondary: #a0a0a0;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --hitokoto-from: #888;
    --cursor-color: #667eea;
    --particle-color: rgba(102, 126, 234, 0.6);
}

body.light-mode {
    --bg-color: #f8f9fc;
    --wave-color-1: rgba(102, 126, 234, 0.25);
    --wave-color-2: rgba(124, 58, 237, 0.2);
    --wave-color-3: rgba(159, 122, 234, 0.15);
    --text-color: #2d3748;
    --text-secondary: #4a5568;
    --card-bg: rgba(255, 255, 255, 0.7);
    --card-border: rgba(0, 0, 0, 0.1);
    --hitokoto-from: #718096;
    --cursor-color: #5a67d8;
    --particle-color: rgba(102, 126, 234, 0.4);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-color);
    min-height: 100vh;
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

/* 波浪背景装饰 */
body::before,
body::after {
    content: '';
    position: fixed;
    left: 0;
    right: 0;
    pointer-events: none;
    z-index: -1;
}

/* 第一层波浪 - 顶部 */
body::before {
    top: 0;
    height: 100vh;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, var(--wave-color-1), transparent),
        radial-gradient(ellipse 60% 40% at 20% 30%, var(--wave-color-2), transparent),
        radial-gradient(ellipse 70% 45% at 80% 40%, var(--wave-color-3), transparent);
}

/* 第二层波浪 - 底部 */
body::after {
    bottom: 0;
    height: 100vh;
    background: 
        radial-gradient(ellipse 80% 50% at 50% 120%, var(--wave-color-1), transparent),
        radial-gradient(ellipse 60% 40% at 80% 70%, var(--wave-color-2), transparent),
        radial-gradient(ellipse 70% 45% at 20% 60%, var(--wave-color-3), transparent);
}

/* 动画波浪层 */
.wave-layer {
    position: fixed;
    width: 200%;
    height: 200%;
    pointer-events: none;
    z-index: -1;
    border-radius: 40%;
    opacity: 0.5;
}

.wave-1 {
    top: -50%;
    left: -50%;
    background: radial-gradient(ellipse at center, var(--wave-color-1), transparent 70%);
    animation: wave-rotate 20s linear infinite;
}

.wave-2 {
    top: -50%;
    left: -50%;
    background: radial-gradient(ellipse at center, var(--wave-color-2), transparent 60%);
    animation: wave-rotate 25s linear infinite reverse;
}

.wave-3 {
    top: -50%;
    left: -50%;
    background: radial-gradient(ellipse at center, var(--wave-color-3), transparent 50%);
    animation: wave-rotate 30s linear infinite;
}

@keyframes wave-rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.container {
    width: 100%;
    max-width: 800px;
    text-align: center;
}

header {
    margin-bottom: 40px;
    animation: fadeInDown 0.8s ease-out;
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #4c51bf 0%, #6b46c1 50%, #805ad5 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
    letter-spacing: -1px;
    transition: background 0.3s ease;
}

body.light-mode h1 {
    background: linear-gradient(135deg, #5a67d8 0%, #7c3aed 50%, #9f7aea 100%);
    -webkit-background-clip: text;
    background-clip: text;
}

#user-bio {
    font-size: 1.6rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.6;
    transition: color 0.3s ease;
}

.hitokoto-wrapper {
    margin-top: 15px;
    animation: fadeIn 1s ease-out 0.3s both;
}

#hitokoto-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 8px;
    font-weight: 400;
    min-height: 1.8em;
}

/* 打字机效果样式 */
.typewriter-text {
    display: inline;
}

#hitokoto-from {
    font-size: 0.8rem;
    color: var(--hitokoto-from);
    font-style: italic;
    transition: color 0.3s ease;
}

.socials-section {
    margin: 50px 0;
    animation: fadeInUp 1s ease-out 0.5s both;
}

.socials-grid {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.social-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    background: var(--card-bg);
    border-radius: 16px;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--card-border);
    position: relative;
    overflow: hidden;
}

.social-name {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 80px;
    transition: color 0.3s ease;
}

.social-wrapper:hover .social-name {
    color: var(--text-color);
}

.social-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.social-link:hover::before {
    opacity: 1;
}

.social-link:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

body.light-mode .social-link:hover {
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

body:not(.light-mode) .social-wrapper:hover .social-name {
    color: #ffffff;
}

body.light-mode .social-wrapper:hover .social-name {
    color: var(--text-color);
}

.social-link svg {
    width: 32px;
    height: 32px;
    fill: var(--text-color);
    position: relative;
    z-index: 1;
    transition: transform 0.3s ease, fill 0.3s ease;
}

.social-link:hover svg {
    fill: #ffffff;
}

.social-link:hover svg {
    transform: scale(1.1);
}

.tooltip {
    position: absolute;
    bottom: -45px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 10;
}

.tooltip::before {
    content: '';
    position: absolute;
    top: -5px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-bottom: 5px solid rgba(0, 0, 0, 0.8);
}

body.light-mode .tooltip {
    background: rgba(0, 0, 0, 0.9);
}

body.light-mode .tooltip::before {
    border-bottom-color: rgba(0, 0, 0, 0.9);
}

.social-link:hover .tooltip {
    opacity: 1;
    visibility: visible;
    bottom: -50px;
}

footer {
    margin-top: 60px;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    animation: fadeIn 1s ease-out 0.7s both;
    transition: color 0.3s ease;
}

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

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

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

@media (max-width: 600px) {
    h1 {
        font-size: 2.5rem;
    }
    
    .hitokoto-card {
        padding: 20px;
    }
    
    #user-bio {
        font-size: 1.3rem;
    }
    
    #hitokoto-text {
        font-size: 0.9rem;
    }
    
    .social-link {
        width: 60px;
        height: 60px;
    }
    
    .social-link svg {
        width: 28px;
        height: 28px;
    }
    
    .social-name {
        font-size: 0.65rem;
        max-width: 70px;
    }
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(128, 128, 128, 0.3);
    border-radius: 50%;
    border-top-color: #667eea;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 主题切换按钮 */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    color: var(--text-color);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.3);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: transparent;
}

.theme-icon {
    width: 24px;
    height: 24px;
    transition: transform 0.3s ease;
}

.theme-icon.hidden {
    display: none;
}

.theme-toggle:hover .theme-icon {
    transform: rotate(180deg);
}

/* 深色模式下显示月亮图标，浅色模式下显示太阳图标 */
body:not(.light-mode) #sun-icon {
    display: none;
}

body.light-mode #moon-icon {
    display: none;
}

body:not(.light-mode) #moon-icon {
    display: block;
}

body.light-mode #sun-icon {
    display: block;
}

/* 粒子轨迹容器 */
.particle-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    overflow: hidden;
}

/* 粒子样式 */
.particle {
    position: absolute;
    border-radius: 50%;
    background: var(--particle-color);
    pointer-events: none;
    box-shadow: 0 0 10px var(--particle-color);
    transition: opacity 1s ease-out, transform 1s ease-out;
}