:root {
    --primary-bg: #FAFBFC;
    --card-bg: #FFFFFF;
    --text-primary: #1A1A1A;
    --text-secondary: #6B7280;
    --text-tertiary: #9CA3AF;
    
    --wordpress-color: #70B7D4;
    --twitter-color: #6BBBF5;
    --bilibili-color: #FFA7C1;
    --tiktok-color: #4A4A4A;
    --youtube-color: #FF6B6B;
    --wechat-color: #6BD39B;
    
    --border-radius-sm: 0.75rem;
    --border-radius-md: 1rem;
    --border-radius-lg: 1.5rem;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background: linear-gradient(135deg, #FAFBFC 0%, #F3F4F6 100%);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    min-height: 100vh;
    line-height: 1.6;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 20% 50%, rgba(107, 211, 155, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(112, 183, 212, 0.05) 0%, transparent 50%);
    z-index: -1;
    animation: backgroundMove 20s ease-in-out infinite;
}

@keyframes backgroundMove {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-5%, -5%); }
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.profile {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: 2rem 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out;
}

.profile::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--wechat-color), var(--twitter-color), var(--youtube-color));
}

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

.profile-header {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    margin-bottom: 1.5rem;
    text-align: left;
    align-items: start;
}

.avatar {
    width: 140px;
    height: 140px;
    position: relative;
}

.avatar::before {
    content: '';
    position: absolute;
    inset: -3px;
    background: linear-gradient(135deg, var(--wechat-color), var(--twitter-color), var(--youtube-color));
    border-radius: 1.2rem;
    z-index: -1;
    animation: rotate 8s linear infinite;
}

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

.avatar img {
    width: 100%;
    height: 100%;
    border-radius: 1rem;
    object-fit: cover;
    border: 4px solid var(--card-bg);
    display: block;
}

.profile-info h1 {
    font-size: 2.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 700;
    background: linear-gradient(135deg, #1A1A1A 0%, #4B5563 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.profile-details {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.8;
}

.profile-details .title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.profile-details a {
    color: var(--twitter-color);
    text-decoration: none;
    border-bottom: 1px dashed var(--twitter-color);
    transition: var(--transition-base);
}

.profile-details a:hover {
    color: var(--text-primary);
    border-bottom-color: var(--text-primary);
}

.bio {
    font-style: italic;
    color: var(--text-secondary);
    margin: 1rem 0;
    font-size: 1.1rem;
    padding: 1rem 0;
    border-top: 1px solid #F3F4F6;
    text-align: center;
    position: relative;
}

.bio::before,
.bio::after {
    content: '"';
    font-size: 2rem;
    color: var(--text-tertiary);
    opacity: 0.3;
    font-family: Georgia, serif;
}

.btc-address {
    position: relative;
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    padding: 1rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    text-align: center;
    transition: var(--transition-base);
    border: 2px solid transparent;
}

.btc-address:hover {
    border-color: #F59E0B;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.2);
}

.btc-address p {
    color: #92400E;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    margin: 0;
    font-weight: 500;
}

.btc-value {
    border-bottom: 1px dashed #92400E;
    transition: var(--transition-base);
}

.btc-value:hover {
    border-bottom-style: solid;
}

.qrcode-popup {
    position: fixed;
    background: white;
    padding: 12px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    display: none;
    z-index: 999;
    animation: popIn 0.2s ease-out;
}

@keyframes popIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.qrcode-popup img {
    display: block;
    width: 120px;
    height: 120px;
}

.tooltip {
    position: fixed;
    background: rgba(0, 0, 0, 0.85);
    color: white;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    display: none;
    pointer-events: none;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.copy-success {
    position: fixed;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    color: white;
    padding: 12px 24px;
    border-radius: 50px;
    display: none;
    z-index: 1001;
    box-shadow: var(--shadow-lg);
    font-weight: 500;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translate(-50%, -20px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

.links-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

@media (min-width: 640px) {
    .links-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.link-card {
    display: flex;
    align-items: center;
    padding: 1rem;
    border-radius: var(--border-radius-md);
    text-decoration: none;
    color: white;
    gap: 0.85rem;
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.1) 100%);
    opacity: 0;
    transition: var(--transition-base);
}

.link-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

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

.icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    transition: var(--transition-base);
}

.link-card:hover .icon {
    transform: scale(1.1) rotate(5deg);
}

.icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.text h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.text p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
}

.wordpress { background: linear-gradient(135deg, #70B7D4 0%, #5BA3BF 100%); }
.twitter { background: linear-gradient(135deg, #6BBBF5 0%, #56A6E0 100%); }
.bilibili { background: linear-gradient(135deg, #FFA7C1 0%, #FF92AC 100%); }
.tiktok { background: linear-gradient(135deg, #4A4A4A 0%, #353535 100%); }
.youtube { background: linear-gradient(135deg, #FF6B6B 0%, #EA5656 100%); }
.wechat { background: linear-gradient(135deg, #6BD39B 0%, #56BE86 100%); }

.projects-section {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: 2rem 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.projects-section h2 {
    font-size: 1.75rem;
    color: var(--text-primary);
    margin-bottom: 1.75rem;
    text-align: center;
    position: relative;
    padding-bottom: 1rem;
    font-weight: 700;
}

.projects-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--wechat-color), var(--twitter-color));
    border-radius: 2px;
}

.projects-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(2, 1fr);
}

.project-card {
    border: 1px solid #F3F4F6;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    transition: var(--transition-base);
    background: var(--card-bg);
    text-decoration: none;
    display: block;
    position: relative;
    background-size: cover;
    background-position: center;
    min-height: 200px;
}

.project-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.9) 100%);
    transition: var(--transition-base);
    z-index: 1;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: #E5E7EB;
}

.project-card:hover::before {
    background: linear-gradient(135deg, rgba(255,255,255,0.85) 0%, rgba(255,255,255,0.75) 100%);
}

.project-content {
    padding: 1.5rem;
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.project-content h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
    transition: var(--transition-base);
}

.project-card:hover .project-content h3 {
    color: var(--twitter-color);
}

.project-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.85rem;
    line-height: 1.5;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: linear-gradient(135deg, #F9FAFB 0%, #F3F4F6 100%);
    color: var(--text-secondary);
    padding: 0.35rem 0.85rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition-base);
    border: 1px solid #E5E7EB;
}

.project-card:hover .tag {
    background: linear-gradient(135deg, var(--wechat-color) 0%, var(--twitter-color) 100%);
    color: white;
    border-color: transparent;
}

.footer {
    text-align: center;
    padding: 1.5rem 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
    animation: fadeInUp 0.6s ease-out 0.6s both;
}

.footer a {
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px dashed var(--text-tertiary);
    transition: var(--transition-base);
}

.footer a:hover {
    color: var(--text-primary);
    border-bottom-color: var(--text-primary);
}

@media (max-width: 768px) {
    .container {
        padding: 1.5rem 1rem;
    }

    .profile {
        padding: 1.5rem 1.25rem;
    }

    .profile-header {
        grid-template-columns: 1fr;
        gap: 1.25rem;
        text-align: center;
    }
    
    .avatar {
        width: 120px;
        height: 120px;
        margin: 0 auto;
    }
    
    .profile-info h1 {
        font-size: 1.85rem;
    }
    
    .profile-details {
        font-size: 0.95rem;
    }

    .bio {
        font-size: 1rem;
        margin: 0.85rem 0;
        padding-top: 0.85rem;
    }

    .btc-address {
        padding: 0.85rem;
    }

    .btc-address p {
        font-size: 0.85rem;
        word-break: break-all;
    }

    .projects-section {
        padding: 1.5rem 1.25rem;
    }

    .projects-section h2 {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }
}

@media (max-width: 640px) {
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 0.85rem;
    }
    
    .profile-info h1 {
        font-size: 1.65rem;
    }

    .project-card {
        min-height: 180px;
    }

    .project-content {
        padding: 1.25rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1.25rem 0.85rem;
    }

    .profile {
        padding: 1.5rem 1rem;
    }

    .profile-info h1 {
        font-size: 1.5rem;
    }

    .bio {
        font-size: 0.95rem;
    }

    .links-grid {
        gap: 0.65rem;
    }

    .link-card {
        padding: 0.85rem;
    }

    .icon {
        width: 36px;
        height: 36px;
    }

    .text h2 {
        font-size: 1rem;
    }

    .text p {
        font-size: 0.85rem;
    }

    .projects-section {
        padding: 1.25rem 1rem;
    }

    .project-content {
        padding: 1rem;
    }

    .footer {
        padding: 1.25rem 1rem;
    }
}