/* ========================================
   一个青年人的自白 - 博客样式
   ======================================== */

/* 变量定义 */
:root {
    --color-bg: #FAFAF8;
    --color-bg-card: #FFFFFF;
    --color-text: #2D2D2D;
    --color-text-secondary: #6B6B6B;
    --color-text-muted: #999999;
    --color-accent: #E07A3A;
    --color-accent-light: #FDF4EE;
    --color-border: #E8E6E3;
    --color-border-light: #F0EFED;
    
    --font-serif: 'Noto Serif SC', 'Songti SC', serif;
    --font-sans: 'Noto Sans SC', 'PingFang SC', sans-serif;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.08);
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.8;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* 容器 */
.container {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   导航栏
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(250, 250, 248, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-light);
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-mark {
    font-family: var(--font-serif);
    font-size: 24px;
    color: var(--color-accent);
    font-weight: 700;
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
}

.nav {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 14px;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--color-text);
    background: var(--color-border-light);
}

.nav-link.active {
    color: var(--color-accent);
    font-weight: 500;
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
}

/* 移动端菜单 */
.mobile-menu {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 24px;
    display: none;
    flex-direction: column;
    gap: 8px;
    z-index: 99;
}

.mobile-menu.active {
    display: flex;
}

.mobile-nav-link {
    padding: 12px 16px;
    font-size: 15px;
    color: var(--color-text-secondary);
    text-align: left;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    color: var(--color-accent);
    background: var(--color-accent-light);
}

/* ========================================
   页面通用
   ======================================== */
.page {
    display: none;
    padding-top: 64px;
    min-height: 100vh;
}

.page.active {
    display: block;
}

/* ========================================
   Hero 区域
   ======================================== */
.hero {
    padding: 100px 0 80px;
    text-align: center;
}

.hero-content {
    max-width: 600px;
    margin: 0 auto;
}

.hero-subtitle {
    font-size: 14px;
    color: var(--color-text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(32px, 6vw, 48px);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 24px;
    letter-spacing: 2px;
}

.hero-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 2;
    margin-bottom: 40px;
}

.hero-line {
    width: 60px;
    height: 3px;
    background: var(--color-accent);
    margin: 0 auto;
}

/* ========================================
   文章列表
   ======================================== */
.articles {
    padding: 40px 0 80px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border);
}

.section-title {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 600;
}

.section-more {
    font-size: 14px;
    color: var(--color-accent);
    transition: var(--transition);
}

.section-more:hover {
    opacity: 0.8;
}

.article-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* 文章卡片 */
.article-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    padding: 28px 32px;
    border: 1px solid var(--color-border-light);
    transition: var(--transition);
    cursor: pointer;
}

.article-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.article-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.article-tag {
    font-size: 12px;
    color: var(--color-accent);
    background: var(--color-accent-light);
    padding: 4px 10px;
    border-radius: 20px;
}

.article-date {
    font-size: 13px;
    color: var(--color-text-muted);
}

.article-title {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 12px;
    transition: var(--transition);
}

.article-card:hover .article-title {
    color: var(--color-accent);
}

.article-excerpt {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-footer {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border-light);
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--color-text-muted);
}

.article-meta svg {
    opacity: 0.6;
}

/* ========================================
   归档页
   ======================================== */
.archive-header {
    padding: 80px 0 40px;
    text-align: center;
}

.page-title {
    font-family: var(--font-serif);
    font-size: clamp(28px, 5vw, 36px);
    font-weight: 700;
    margin-bottom: 12px;
}

.page-subtitle {
    font-size: 15px;
    color: var(--color-text-secondary);
}

.archive-content {
    padding-bottom: 80px;
}

.archive-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.archive-year {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-accent);
}

.archive-year-articles {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding-left: 16px;
}

.archive-item {
    display: flex;
    align-items: baseline;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px dashed var(--color-border);
    cursor: pointer;
    transition: var(--transition);
}

.archive-item:hover {
    padding-left: 8px;
}

.archive-item:hover .archive-item-title {
    color: var(--color-accent);
}

.archive-item-date {
    font-size: 13px;
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.archive-item-title {
    font-size: 15px;
    color: var(--color-text);
    transition: var(--transition);
}

/* ========================================
   文章详情
   ======================================== */
.article-detail {
    max-width: 720px;
    margin: 0 auto;
    padding: 60px 24px 100px;
}

.article-detail-header {
    margin-bottom: 40px;
    text-align: center;
}

.article-detail-title {
    font-family: var(--font-serif);
    font-size: clamp(26px, 5vw, 34px);
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 20px;
}

.article-detail-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    font-size: 14px;
    color: var(--color-text-muted);
}

.article-detail-content {
    font-size: 17px;
    line-height: 2;
    color: var(--color-text);
}

.article-detail-content p {
    margin-bottom: 24px;
    text-align: justify;
}

.article-detail-content h2 {
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 600;
    margin: 48px 0 20px;
}

.article-detail-content h3 {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 600;
    margin: 36px 0 16px;
}

.article-detail-content blockquote {
    margin: 32px 0;
    padding: 20px 24px;
    background: var(--color-accent-light);
    border-left: 4px solid var(--color-accent);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
}

.article-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 48px;
    padding: 12px 20px;
    font-size: 14px;
    color: var(--color-text-secondary);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.article-back:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ========================================
   关于页
   ======================================== */
.about-header {
    padding: 100px 0 60px;
    text-align: center;
}

.about-avatar {
    width: 100px;
    height: 100px;
    margin: 0 auto 24px;
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 36px;
    font-weight: 700;
    color: var(--color-accent);
    background: var(--color-accent-light);
    border-radius: 50%;
}

.about-name {
    font-family: var(--font-serif);
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.about-tagline {
    font-size: 14px;
    color: var(--color-text-muted);
    letter-spacing: 2px;
}

.about-content {
    padding-bottom: 100px;
}

.about-text {
    max-width: 600px;
    margin: 0 auto 48px;
}

.about-text p {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 2;
    margin-bottom: 20px;
    text-align: center;
}

.about-links {
    text-align: center;
}

.about-links h3 {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    font-size: 14px;
    color: var(--color-text-secondary);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.social-link:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* ========================================
   页脚
   ======================================== */
.footer {
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--color-border-light);
}

.footer-text {
    font-size: 13px;
    color: var(--color-text-muted);
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero {
        padding: 80px 0 60px;
    }
    
    .hero-desc {
        font-size: 15px;
    }
    
    .article-card {
        padding: 24px;
    }
    
    .article-title {
        font-size: 18px;
    }
    
    .article-excerpt {
        font-size: 14px;
    }
    
    .article-detail-content {
        font-size: 16px;
    }
    
    .archive-item {
        flex-direction: column;
        gap: 4px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        letter-spacing: 1px;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .social-links {
        flex-direction: column;
        align-items: center;
    }
    
    .social-link {
        width: 100%;
        justify-content: center;
    }
}

/* ========================================
   动画
   ======================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.article-card,
.archive-year,
.archive-item,
.about-header,
.about-text,
.about-links {
    animation: fadeIn 0.5s ease forwards;
}

.article-card:nth-child(1) { animation-delay: 0.1s; }
.article-card:nth-child(2) { animation-delay: 0.2s; }
.article-card:nth-child(3) { animation-delay: 0.3s; }
.article-card:nth-child(4) { animation-delay: 0.4s; }

/* ========================================
   页面通用头部
   ======================================== */
.page-header {
    padding: 80px 0 40px;
    text-align: center;
}

/* ========================================
   图片板块
   ======================================== */
.photos-content {
    padding-bottom: 80px;
}

.photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.photo-item {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    background: var(--color-border-light);
}

.photo-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.photo-item:hover img {
    transform: scale(1.08);
}

.photo-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.3s ease;
    display: flex;
    align-items: flex-end;
    padding: 20px;
}

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

.photo-info {
    color: #fff;
}

.photo-title {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 4px;
}

.photo-desc {
    font-size: 13px;
    opacity: 0.8;
}

.photo-category {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 4px 12px;
    background: rgba(255,255,255,0.9);
    border-radius: 20px;
    font-size: 12px;
    color: var(--color-text);
}

/* 图片灯笼弹窗 */
.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.95);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    max-width: 90vw;
    max-height: 90vh;
    text-align: center;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 80vh;
    border-radius: var(--radius-md);
}

.lightbox-info {
    margin-top: 24px;
    color: #fff;
}

.lightbox-info h3 {
    font-family: var(--font-serif);
    font-size: 20px;
    margin-bottom: 8px;
}

.lightbox-info p {
    font-size: 14px;
    opacity: 0.7;
}

.lightbox-close {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    font-size: 32px;
    color: #fff;
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.3s;
}

.lightbox-close:hover {
    background: rgba(255,255,255,0.2);
}

/* ========================================
   视频板块
   ======================================== */
.videos-content {
    padding-bottom: 80px;
}

.video-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 32px;
}

.video-item {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

.video-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.video-cover {
    position: relative;
    aspect-ratio: 16/9;
    background: #000;
    overflow: hidden;
}

.video-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.3);
    transition: background 0.3s;
}

.video-item:hover .video-play-btn {
    background: rgba(0,0,0,0.4);
}

.video-play-icon {
    width: 64px;
    height: 64px;
    background: rgba(255,255,255,0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s;
}

.video-item:hover .video-play-icon {
    transform: scale(1.1);
}

.video-play-icon svg {
    width: 28px;
    height: 28px;
    margin-left: 4px;
    fill: var(--color-accent);
}

.video-meta {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 10px;
    background: rgba(0,0,0,0.6);
    border-radius: 4px;
    font-size: 12px;
    color: #fff;
}

.video-info {
    padding: 20px;
}

.video-title {
    font-family: var(--font-serif);
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text);
}

.video-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* 视频弹窗 */
.videobox {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.95);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.videobox.active {
    display: flex;
}

.videobox-content {
    width: 100%;
    max-width: 1000px;
    aspect-ratio: 16/9;
    background: #000;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.videobox-content iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.videobox-close {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    font-size: 32px;
    color: #fff;
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

.videobox-close:hover {
    background: rgba(255,255,255,0.2);
}

/* ========================================
   空状态
   ======================================== */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--color-text-muted);
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 16px;
}

/* ========================================
   响应式增强
   ======================================== */
@media (max-width: 768px) {
    .photo-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 16px;
    }
    
    .video-list {
        grid-template-columns: 1fr;
    }
    
    .lightbox, .videobox {
        padding: 20px;
    }
}

/* ========================================
   评论区
   ======================================== */
.article-comments {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--color-border);
}

.comments-title {
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 32px;
}

.comments-list {
    margin-bottom: 40px;
}

.no-comments {
    text-align: center;
    padding: 40px 20px;
    color: var(--color-text-muted);
    font-size: 15px;
    background: var(--color-bg-card);
    border-radius: var(--radius);
}

.comment-item {
    display: flex;
    gap: 16px;
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border);
}

.comment-item:last-child {
    border-bottom: none;
}

.comment-avatar {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #f5a623 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    flex-shrink: 0;
}

.comment-body {
    flex: 1;
    min-width: 0;
}

.comment-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.comment-author {
    font-weight: 600;
    font-size: 15px;
    color: var(--color-text);
}

.comment-time {
    font-size: 13px;
    color: var(--color-text-muted);
}

.comment-content {
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    word-break: break-word;
}

/* 评论表单 */
.comment-form {
    background: var(--color-bg-card);
    padding: 32px;
    border-radius: var(--radius-lg);
    margin-top: 32px;
}

.comment-form-title {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 24px;
}

.comment-input,
.comment-textarea {
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg);
    font-family: inherit;
    transition: var(--transition);
}

.comment-input:focus,
.comment-textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(224, 122, 58, 0.1);
}

.comment-textarea {
    resize: vertical;
    min-height: 120px;
}

.comment-submit {
    margin-top: 16px;
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 500;
    color: #fff;
    background: var(--color-accent);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
}

.comment-submit:hover {
    background: #c96a2f;
    transform: translateY(-1px);
}

@media (max-width: 768px) {
    .comment-form {
        padding: 24px 20px;
    }
}