/* 基础样式和变量定义 */
:root {
    /* 亮色主题变量 */
    --bg-color: #f8f9fa;
    --text-color: #333333;
    --card-bg: #ffffff;
    --primary-color: #3a86ff;
    --secondary-color: #4cc9f0;
    --accent-color: #4361ee;
    --gradient-start: #3a86ff;
    --gradient-end: #4cc9f0;
    --shadow-color: rgba(0, 0, 0, 0.08);
    --border-color: rgba(0, 0, 0, 0.1);
}

/* 暗色主题变量 */
[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --card-bg: #1e1e1e;
    --primary-color: #bb86fc;
    --secondary-color: #3700b3;
    --accent-color: #03dac6;
    --gradient-start: #bb86fc;
    --gradient-end: #6200ea;
    --shadow-color: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

body {
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
    min-height: 100vh;
    transition: background-color 0.5s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 导航栏和主题切换 */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding-top: 20px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(
        135deg,
        var(--gradient-start),
        var(--gradient-end)
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.theme-switcher {
    display: flex;
    background: var(--card-bg);
    border-radius: 50px;
    padding: 5px;
    box-shadow: 0 4px 12px var(--shadow-color);
    border: 1px solid var(--border-color);
}

.theme-btn {
    background: transparent;
    border: none;
    padding: 8px 18px;
    border-radius: 50px;
    font-size: 14px;
    cursor: pointer;
    color: var(--text-color);
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.theme-btn.active {
    background: linear-gradient(
        135deg,
        var(--gradient-start),
        var(--gradient-end)
    );
    color: white;
}

/* 个人资料部分 */
.profile-section {
    text-align: center;
    margin-bottom: 60px;
    padding: 0 20px;
}

.avatar-container {
    position: relative;
    width: 180px;
    height: 180px;
    margin: 0 auto 25px;
}

.avatar {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 5px solid var(--card-bg);
    box-shadow: 0 10px 30px var(--shadow-color);
    background: linear-gradient(
        135deg,
        var(--gradient-start),
        var(--gradient-end)
    );
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

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

.avatar-placeholder {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 70px;
}

.avatar-placeholder i {
    font-size: 70px;
}

.avatar-decor {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px dashed var(--primary-color);
    top: -8px;
    left: -8px;
    z-index: -1;
    animation: rotate 20s linear infinite;
}

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

.name {
    font-size: 2.8rem;
    margin-bottom: 10px;
    background: linear-gradient(
        135deg,
        var(--gradient-start),
        var(--gradient-end)
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.tagline {
    font-size: 1.3rem;
    opacity: 0.85;
    max-width: 700px;
    margin: 0 auto;
    color: var(--text-color);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 25px;
}

.social-link {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    color: var(--primary-color);
    font-size: 1.2rem;
    box-shadow: 0 5px 15px var(--shadow-color);
    transition: all 0.3s;
    border: 1px solid var(--border-color);
}

.social-link:hover {
    transform: translateY(-5px);
    background: linear-gradient(
        135deg,
        var(--gradient-start),
        var(--gradient-end)
    );
    color: white;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

/* 卡片布局 */
.section-title {
    font-size: 2rem;
    margin-bottom: 35px;
    position: relative;
    padding-left: 15px;
    display: inline-block;
}

.section-title::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 80%;
    background: linear-gradient(
        to bottom,
        var(--gradient-start),
        var(--gradient-end)
    );
    border-radius: 10px;
}

.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 35px;
    margin-bottom: 70px;
}

.card {
    background: var(--card-bg);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px var(--shadow-color);
    transition: transform 0.4s, box-shadow 0.4s;
    border: 1px solid var(--border-color);
}

.card:hover {
    transform: translateY(-12px);
    box-shadow: 0 15px 40px var(--shadow-color);
}

.card-header {
    padding: 25px;
    background: linear-gradient(
        135deg,
        var(--gradient-start),
        var(--gradient-end)
    );
    color: white;
    display: flex;
    align-items: center;
    gap: 15px;
}

.card-icon {
    font-size: 1.8rem;
}

.card-title {
    font-size: 1.6rem;
    margin: 0;
    font-weight: 700;
}

.card-body {
    padding: 30px;
}

.platform-list,
.project-list,
.friend-list {
    list-style: none;
}

.platform-item,
.project-item,
.friend-item {
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
}

.platform-item:last-child,
.project-item:last-child,
.friend-item:last-child {
    border-bottom: none;
}

.platform-link,
.project-link,
.friend-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-color);
    transition: color 0.3s;
    gap: 12px;
    width: 100%;
}

.platform-link:hover,
.project-link:hover,
.friend-link:hover {
    color: var(--primary-color);
}

.platform-icon,
.project-icon,
.friend-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    background: linear-gradient(
        135deg,
        var(--gradient-start),
        var(--gradient-end)
    );
    flex-shrink: 0;
}

.platform-info,
.project-info,
.friend-info {
    flex: 1;
}

.platform-name,
.project-name,
.friend-name {
    font-weight: 600;
    margin-bottom: 4px;
}

.platform-desc,
.project-desc,
.friend-desc {
    font-size: 0.9rem;
    opacity: 0.8;
}

.platform-icon img,
.friend-icon img
{
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    background: linear-gradient(
        135deg,
        var(--gradient-start),
        var(--gradient-end)
    );
    color: white;
    border: none;
    border-radius: 15px;
    font-size: 1.05rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.12);
    gap: 10px;
}

.btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: linear-gradient(
        135deg,
        var(--gradient-start),
        var(--gradient-end)
    );
    color: white;
}

/* 页脚 */
footer {
    text-align: center;
    padding: 40px 0 30px;
    color: var(--text-color);
    opacity: 0.7;
    font-size: 0.95rem;
    border-top: 1px solid var(--border-color);
    margin-top: 30px;
}

/* 响应式设计 */
@media (max-width: 900px) {
    .cards-container {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 25px;
    }
}

@media (max-width: 768px) {
    .name {
        font-size: 2.2rem;
    }

    .tagline {
        font-size: 1.1rem;
    }

    .cards-container {
        grid-template-columns: 1fr;
    }

    .theme-switcher {
        width: 100%;
        max-width: 300px;
        margin: 20px auto 0;
    }

    header {
        flex-direction: column;
        gap: 20px;
    }

    .section-title {
        font-size: 1.7rem;
    }
}

@media (max-width: 480px) {
    .theme-btn span {
        display: none;
    }

    .theme-btn {
        padding: 10px;
    }

    .avatar-container {
        width: 150px;
        height: 150px;
    }

    .name {
        font-size: 2rem;
    }

    .card-header {
        padding: 20px;
    }

    .card-body {
        padding: 25px;
    }
}