/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 1rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-logo a:hover {
    color: #ffd700;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    margin-left: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #ffd700;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #ffd700;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 3px 0;
    transition: 0.3s;
}

/* 轮播图样式 */
.carousel-section {
    margin-top: 80px;
    height: 100vh;
    position: relative;
    overflow: hidden;
}

.carousel-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.carousel {
    width: 100%;
    height: 100%;
    position: relative;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5%;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
}

.slide.active {
    opacity: 1;
    animation: fadeInContent 0.8s ease-out;
}

.slide.active .slide-content {
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.slide.active .slide-image {
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.slide:nth-child(1) {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.slide:nth-child(2) {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.slide:nth-child(3) {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.slide-content {
    flex: 1;
    max-width: 600px;
    opacity: 0;
    transform: translateY(30px);
}

.slide-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
    line-height: 1.2;
}

.slide-content p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
    padding: 15px 30px;
    font-size: 1.1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.cta-button:hover {
    background: white;
    color: #333;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.slide-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transform: translateY(30px);
}

.placeholder-image {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.placeholder-image i {
    font-size: 6rem;
    color: rgba(255, 255, 255, 0.8);
}

/* 轮播图控制按钮 */
.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    z-index: 10;
}

.carousel-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-50%) scale(1.1);
}

.prev-btn {
    left: 30px;
}

.next-btn {
    right: 30px;
}

/* 轮播图指示器 */
.carousel-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 10;
}

.indicator {
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: white;
    transform: scale(1.2);
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.8);
}

/* 动画效果 */
@keyframes fadeInContent {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* 内容区域样式 */
.about-section,
.articles-section,
.projects-section,
.contact-section {
    padding: 80px 0;
}

.about-section {
    background: white;
}

.articles-section {
    background: #f8f9fa;
}

.projects-section {
    background: white;
}

.contact-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

/* 标题样式 */
h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
    position: relative;
}

.contact-section h2 {
    color: white;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.contact-section h2::after {
    background: white;
}

/* 关于我区域 */
.about-header {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.about-header h2 {
    margin-bottom: 0;
    text-align: left;
}

.about-header h2::after {
    display: none; /* 隐藏下划线 */
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

/* 头像样式 */
.profile-avatar {
    position: relative;
    flex-shrink: 0;
}

.avatar-image {
    width: 80px;
    height: 80px;
    border-radius: 10%;
    object-fit: cover;
    border: 3px solid transparent;
    background: linear-gradient(white, white) padding-box,
                linear-gradient(135deg, #667eea 0%, #8fc0c0 100%) border-box;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
}

.avatar-image:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.avatar-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.avatar-placeholder i {
    font-size: 1.8rem;
    color: white;
}

/* 当图片加载失败时显示占位符 */
.avatar-image:not([src]),
.avatar-image[src=""] {
    opacity: 0;
}

.avatar-image:not([src]) + .avatar-placeholder,
.avatar-image[src=""] + .avatar-placeholder {
    opacity: 1;
}

/* 防止组件加载时闪烁 */
.about-header-container,
.about-content-container,
#author-avatar-container {
    min-height: 80px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.about-header-container.component-loaded,
.about-content-container.component-loaded,
#author-avatar-container.component-loaded {
    opacity: 1;
}

/* 如果JavaScript未加载，显示基本内容 */
.no-js .about-header-container,
.no-js .about-content-container,
.no-js #author-avatar-container {
    opacity: 1;
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
}

.about-text p {
    margin-bottom: 1.5rem;
}

.skills h3 {
    margin-bottom: 1.5rem;
    color: #333;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 8px 16px;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* 文章网格 */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.article-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.article-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
}

.article-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.article-image .placeholder-image {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.article-image .placeholder-image i {
    font-size: 2rem;
    color: white;
}

.article-content {
    padding: 1.5rem;
}

.article-content h3 {
    margin-bottom: 1rem;
    color: #333;
    font-size: 1.3rem;
}

.article-content p {
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: #888;
}

.category {
    background: #e9ecef;
    padding: 4px 12px;
    border-radius: 15px;
    color: #666;
}

/* 项目网格 */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
}

.project-image {
    height: 200px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-content {
    padding: 1.5rem;
}

.project-content h3 {
    margin-bottom: 1rem;
    color: #333;
    font-size: 1.3rem;
}

.project-content p {
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-tag {
    background: #e9ecef;
    color: #666;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
}

/* 联系我区域 */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.contact-item i {
    margin-right: 1rem;
    font-size: 1.3rem;
    color: #ffd700;
}

/* 二维码样式 */
.qr-code-item {
    flex-direction: column;
    align-items: flex-start;
}

.qr-code-container {
    margin-top: 0.5rem;
    margin-left: 2.3rem;
}

.qr-code-placeholder {
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px dashed rgba(255, 215, 0, 0.5);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.qr-code-placeholder:hover {
    border-color: #ffd700;
    background: rgba(255, 255, 255, 0.15);
    transform: scale(1.05);
}

.qr-code-placeholder i {
    font-size: 2rem;
    color: #ffd700;
    margin-bottom: 0.5rem;
}

.qr-code-placeholder p {
    font-size: 0.8rem;
    color: #fff;
    margin: 0;
    text-align: center;
}

.contact-form {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    margin-bottom: 1rem;
    border: none;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
}

.contact-form button {
    background: white;
    color: #667eea;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.contact-form button:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* 页脚 */
.footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* 背景音乐播放器（在 app.html 外壳中固定） */
.music-player {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 2000;
}
.music-player #bgm-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border: none;
    border-radius: 999px;
    padding: 10px 14px;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(102,126,234,.35);
    transition: transform .2s ease, box-shadow .2s ease;
}
.music-player #bgm-toggle:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(102,126,234,.45); }
.music-player #bgm-toggle i { font-size: 16px; }
.music-player #bgm-status { font-size: 13px; }

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0,0,0,0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-item {
        margin: 1rem 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .slide {
        flex-direction: column;
        text-align: center;
        padding: 2rem;
    }

    .slide-content {
        max-width: 100%;
        margin-bottom: 2rem;
    }

    .slide-content h1 {
        font-size: 2.5rem;
    }

    .slide-image {
        margin-top: 2rem;
    }

    .placeholder-image {
        width: 200px;
        height: 200px;
    }

    .placeholder-image i {
        font-size: 4rem;
    }

    .carousel-btn {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }

    .prev-btn {
        left: 15px;
    }

    .next-btn {
        right: 15px;
    }

    .about-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 1rem;
    }

    .about-header h2 {
        text-align: center;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .avatar-image,
    .avatar-placeholder {
        width: 60px;
        height: 60px;
    }

    .avatar-placeholder i {
        font-size: 1.5rem;
    }

    .articles-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    /* 移动端二维码样式 */
    .qr-code-placeholder {
        width: 100px;
        height: 100px;
    }

    .qr-code-placeholder i {
        font-size: 1.5rem;
    }

    .qr-code-placeholder p {
        font-size: 0.7rem;
    }

    h2 {
        font-size: 2rem;
    }
}

@media screen and (max-width: 480px) {
    .slide-content h1 {
        font-size: 2rem;
    }

    .slide-content p {
        font-size: 1.1rem;
    }

    .container {
        padding: 0 15px;
    }

    .carousel-indicators {
        bottom: 20px;
    }

    .indicator {
        width: 12px;
        height: 12px;
    }
}