/* ===== CSS 变量定义 ===== */
:root {
    --primary-pink: #ff6b9d;
    --primary-blue: #00d4ff;
    --primary-purple: #c471ed;
    --bg-gradient-start: #ffeef8;
    --bg-gradient-end: #e8f4ff;
    --card-bg: rgba(255, 255, 255, 0.85);
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --shadow-soft: 0 4px 20px rgba(255, 107, 157, 0.15);
    --shadow-hover: 0 8px 30px rgba(255, 107, 157, 0.25);
    --border-radius: 20px;
    --border-radius-sm: 12px;
    --transition: all 0.3s ease;
}

/* ===== 基础样式重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== 粒子画布 ===== */
#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 3rem;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-soft);
    z-index: 100;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.nav-links a:hover {
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-blue));
    color: white;
    transform: translateY(-2px);
}

/* ===== 通用区域样式 ===== */
.section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

/* ===== 个人介绍区域 ===== */
.about-section {
    padding-top: 8rem;
}

.about-container {
    display: flex;
    align-items: center;
    gap: 4rem;
    background: var(--card-bg);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(10px);
}

.avatar-wrapper {
    position: relative;
    flex-shrink: 0;
}

.avatar {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid transparent;
    background: linear-gradient(white, white) padding-box,
        linear-gradient(135deg, var(--primary-pink), var(--primary-blue)) border-box;
}

.avatar-ring {
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border-radius: 50%;
    border: 3px dashed var(--primary-pink);
    animation: spin 20s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.about-content {
    flex: 1;
}

.greeting {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.highlight {
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--primary-purple);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.bio {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.social-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.social-btn {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-purple));
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}

.social-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* ===== 图片展示区域 ===== */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.gallery-item {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    aspect-ratio: 4/3;
    cursor: pointer;
    transition: var(--transition);
}

.gallery-item:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-hover);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.8), rgba(0, 212, 255, 0.8));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-overlay span {
    color: white;
    font-weight: 700;
    font-size: 1.1rem;
    padding: 0.5rem 1rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--border-radius-sm);
}

/* ===== 文章展示区域 ===== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.article-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.article-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.article-cover {
    position: relative;
    aspect-ratio: 3/2;
    overflow: hidden;
}

.article-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.article-card:hover .article-cover img {
    transform: scale(1.1);
}

.article-cover-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
}

.article-cover-overlay span {
    color: white;
    font-size: 0.85rem;
    background: rgba(255, 107, 157, 0.8);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
}

.article-content {
    padding: 1.5rem;
}

.article-date {
    color: var(--primary-pink);
    font-size: 0.85rem;
    font-weight: 600;
}

.article-title {
    font-size: 1.3rem;
    margin: 0.5rem 0;
    color: var(--text-primary);
}

.article-excerpt {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    line-height: 1.7;
}

.read-more {
    display: inline-block;
    color: var(--primary-purple);
    text-decoration: none;
    font-weight: 700;
    transition: var(--transition);
}

.read-more:hover {
    color: var(--primary-pink);
    transform: translateX(5px);
}

/* ===== 页脚 ===== */
.footer {
    text-align: center;
    padding: 2rem;
    background: var(--card-bg);
    color: var(--text-secondary);
    backdrop-filter: blur(10px);
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem 1.5rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-links a {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }

    .about-container {
        flex-direction: column;
        text-align: center;
        padding: 2rem;
        gap: 2rem;
    }

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

    .greeting {
        font-size: 1.5rem;
    }

    .social-links {
        justify-content: center;
    }

    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .nav-brand {
        font-size: 1.2rem;
    }

    .nav-links {
        gap: 0.5rem;
    }

    .nav-links a {
        padding: 0.3rem 0.5rem;
        font-size: 0.8rem;
    }

    .section {
        padding: 4rem 1rem;
    }
}

/* ===== 动画效果 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.about-container,
.gallery-item,
.article-card {
    animation: fadeInUp 0.6s ease-out;
}

.gallery-item:nth-child(2) {
    animation-delay: 0.1s;
}

.gallery-item:nth-child(3) {
    animation-delay: 0.2s;
}

.gallery-item:nth-child(4) {
    animation-delay: 0.3s;
}

.article-card:nth-child(2) {
    animation-delay: 0.1s;
}

.article-card:nth-child(3) {
    animation-delay: 0.2s;
}

/* ===== 图片灯箱 ===== */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox.active {
    display: flex;
    opacity: 1;
}

.lightbox-img {
    max-width: 90%;
    max-height: 90%;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 50px rgba(255, 107, 157, 0.3);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.lightbox.active .lightbox-img {
    transform: scale(1);
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 3rem;
    color: white;
    cursor: pointer;
    transition: var(--transition);
    z-index: 2001;
}

.lightbox-close:hover {
    color: var(--primary-pink);
    transform: rotate(90deg);
}