/* 动态主题CSS变量 */
:root {
    /* 主题色彩 */
    --color-primary: #4A90E2;
    --color-secondary: #357abd;
    --color-success: #27ae60;
    --color-danger: #e74c3c;
    --color-warning: #f39c12;
    --color-info: #3498db;
    --color-light: #f5f7fa;
    --color-dark: #333;

    /* 卡片配置 */
--card-border-radius: 20px;
--card-padding: 60px;
--card-margin-bottom: 30px;
--card-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);

    /* 动画配置 */
    --animation-duration: 0.3s;
    --animation-easing: ease;
}

/* 应用CSS变量的样式 */
.card {
    border-radius: var(--card-border-radius);
    padding: 0; /* 使用card-container来控制内边距 */
    margin-bottom: var(--card-margin-bottom);
    box-shadow: var(--card-shadow);
    transition: all var(--animation-duration) var(--animation-easing);
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(50px);
    -webkit-backdrop-filter: blur(50px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    position: relative;
    overflow: hidden;
}

.card-container {
    padding: 60px !important;
    position: relative;
    z-index: 1;
}

.music-player {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-radius: 50px;
    padding: 12px 20px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
    transition: all var(--animation-duration) var(--animation-easing);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.music-btn {
    color: var(--color-primary);
    transition: all var(--animation-duration) var(--animation-easing);
}

.progress-fill {
    background: var(--color-primary);
    transition: width var(--animation-duration) var(--animation-easing);
}

.main-title {
    color: var(--color-primary);
}

.profile-name {
    color: var(--color-primary);
}

.profile-title {
    color: var(--color-primary);
}

.divider {
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

.contact-card h3,
.about-card h3,
.projects-card h3,
.message-board-card h3 {
    color: var(--color-primary);
}

.contact-item i {
    color: var(--color-primary);
}

.social-icon {
    transition: all var(--animation-duration) var(--animation-easing);
}

.project-icon {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.project-tag {
    background: rgba(74, 144, 226, 0.12);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    color: var(--color-primary);
    border: 1px solid rgba(74, 144, 226, 0.25);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.15);
}

.project-arrow {
    color: var(--color-primary);
}

.message-form input:focus,
.message-form textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.submit-btn {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.message-author {
    color: var(--color-primary);
}

.message-item {
    border-left: 3px solid var(--color-primary);
}

.editable:hover {
    background: rgba(74, 144, 226, 0.1);
}

.editable:focus {
    background: rgba(74, 144, 226, 0.2);
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.3);
}