/* PC桌面端专用样式 - Letter of Goodbye Desktop Version */

:root {
    --primary: #7f5af0;
    --primary-rgb: 127, 90, 240;
    --secondary: #2cb67d;
    --secondary-rgb: 44, 182, 125;
    --accent: #ff6b6b;
    --accent-rgb: 255, 107, 107;
    --background: #f8f9fa;
    --text: #2a2a2a;
    --card-bg: rgba(255, 255, 255, 0.95);
    --sidebar-bg: rgba(255, 255, 255, 0.85);
    --nav-bg: rgba(255, 255, 255, 0.95);
    --border: rgba(0, 0, 0, 0.1);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 12px 48px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --spacing: 1.5rem;
}

[data-theme="dark"] {
    --primary: #BB86FC;
    --primary-rgb: 187, 134, 252;
    --secondary: #03DAC6;
    --secondary-rgb: 3, 218, 198;
    --accent: #ff9999;
    --accent-rgb: 255, 153, 153;
    --background: #0f0f0f;
    --text: #e4e4e4;
    --card-bg: rgba(26, 26, 26, 0.95);
    --sidebar-bg: rgba(20, 20, 20, 0.85);
    --nav-bg: rgba(24, 24, 24, 0.95);
    --border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body.desktop-layout {
    font-family: 'Ma Shan Zheng', cursive, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--background) center/cover fixed no-repeat;
    background-size: cover;
    background-attachment: fixed;
    background-position: center center;
    color: var(--text);
    min-height: 100vh;
    transition: var(--transition);
    position: relative;
    line-height: 1.6;
    overflow-x: hidden;
}

/* 粒子背景 */
#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    z-index: 0;
}

/* 全屏加载动画 */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--background);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s, visibility 0.5s;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.loader-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(var(--primary-rgb), 0.3);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 1s linear infinite;
}

/* 顶部导航栏 */
.desktop-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    z-index: 1000;
    transition: var(--transition);
}

.nav-left .logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.4rem;
    font-weight: bold;
    color: var(--primary);
}

.nav-center .nav-quote {
    font-style: italic;
    color: var(--text);
    opacity: 0.8;
    max-width: 400px;
    text-align: center;
    font-size: 1rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.visit-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text);
    opacity: 0.8;
}

.nav-btn {
    padding: 0.8rem;
    border: none;
    border-radius: 50%;
    background: rgba(var(--primary-rgb), 0.1);
    color: var(--primary);
    cursor: pointer;
    transition: var(--transition);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-btn:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.1);
}

/* 主布局容器 */
.desktop-container {
    display: grid;
    grid-template-columns: 320px 1fr 350px;
    gap: 0;
    min-height: 100vh;
    padding-top: 70px;
    position: relative;
    z-index: 1;
    background: transparent;
}

/* 左侧边栏 */
.left-sidebar {
    background: var(--sidebar-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--border);
    padding: var(--spacing);
    overflow-y: auto;
    height: calc(100vh - 70px);
    position: sticky;
    top: 70px;
}

/* 右侧边栏 */
.right-sidebar {
    background: var(--sidebar-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid var(--border);
    padding: var(--spacing);
    overflow-y: auto;
    height: calc(100vh - 70px);
    position: sticky;
    top: 70px;
}

/* 主要内容区域 */
.main-content {
    padding: 2rem 3rem;
    max-width: none;
    background: transparent;
    min-height: calc(100vh - 70px);
}

/* 侧边栏通用样式 */
.sidebar-section {
    margin-bottom: 2rem;
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.sidebar-section:hover {
    box-shadow: var(--shadow-hover);
}

.sidebar-section h3 {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: var(--spacing);
    color: var(--primary);
    font-size: 1.1rem;
    border-bottom: 2px solid rgba(var(--primary-rgb), 0.2);
    padding-bottom: 0.5rem;
}

/* 主题控制 */
.theme-controls {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.theme-btn {
    padding: 0.8rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.theme-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.4);
}

/* 桌面版音乐播放器 */
.desktop-music-player {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.music-cover {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(var(--primary-rgb), 0.05);
    border-radius: var(--border-radius);
    border: 2px solid rgba(var(--primary-rgb), 0.1);
}

.cover-art {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.music-info {
    flex: 1;
    min-width: 0;
}

.music-title {
    font-weight: bold;
    color: var(--text);
    margin-bottom: 0.3rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.music-artist {
    color: var(--text);
    opacity: 0.7;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.music-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    padding: 0.5rem 0;
}

.control-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: rgba(var(--primary-rgb), 0.1);
    color: var(--primary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.control-btn:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.1);
}

.play-btn {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    font-size: 1.2rem;
}

.music-progress-container {
    margin: 1rem 0;
}

.progress-bar-container {
    width: 100%;
    height: 6px;
    background: rgba(var(--primary-rgb), 0.2);
    border-radius: 3px;
    overflow: hidden;
    cursor: pointer;
    margin-bottom: 0.5rem;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    width: 0%;
    transition: width 0.3s ease;
}

.time-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text);
    opacity: 0.7;
}

.volume-container {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.volume-slider {
    flex: 1;
    height: 4px;
    border-radius: 2px;
    background: rgba(var(--primary-rgb), 0.2);
    outline: none;
    -webkit-appearance: none;
}

.volume-slider::-webkit-slider-thumb {
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
}

/* 数据统计面板 */
.stats-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem;
    background: rgba(var(--secondary-rgb), 0.05);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.stat-item:hover {
    background: rgba(var(--secondary-rgb), 0.1);
    transform: translateX(5px);
}

.stat-item i {
    color: var(--secondary);
    width: 20px;
    text-align: center;
}

/* 内容头部 */
.content-header {
    text-align: center;
    margin-bottom: 3rem;
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: 3rem 2rem;
    box-shadow: var(--shadow);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.content-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

.main-title {
    font-family: 'Zhi Mang Xing', cursive;
    font-size: clamp(3rem, 5vw, 4.5rem);
    color: var(--primary);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    letter-spacing: 3px;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 4s ease infinite;
}

.title-decoration {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 1rem;
}

.decoration-line {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.title-decoration i {
    color: var(--primary);
    font-size: 1.5rem;
    animation: float 3s ease-in-out infinite;
}

/* 文章内容 */
.letter-content {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    line-height: 1.8;
    position: relative;
}

.letter-content::before {
    content: '"';
    position: absolute;
    top: 1rem;
    left: 2rem;
    font-size: 4rem;
    color: var(--primary);
    opacity: 0.3;
    font-family: 'Times New Roman', serif;
}

.letter-content p {
    font-size: 1.2rem;
    margin: 2rem 0;
    padding: 1.5rem;
    background: rgba(var(--primary-rgb), 0.03);
    border-left: 4px solid var(--primary);
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
}

.letter-content p:hover {
    background: rgba(var(--primary-rgb), 0.06);
    transform: translateX(8px);
    box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.1);
}

.signature-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid rgba(var(--primary-rgb), 0.2);
    text-align: right;
}

.signature {
    font-style: italic;
    color: var(--primary);
    font-size: 1.3rem;
    letter-spacing: 0.05em;
    display: inline-block;
    padding: 1rem 2rem;
    background: rgba(var(--primary-rgb), 0.05);
    border-radius: var(--border-radius);
    position: relative;
}

.signature::before {
    content: '✒️';
    position: absolute;
    top: -10px;
    left: -10px;
    font-size: 1.5rem;
}

/* 评论发布区域 */
.comment-compose-section {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: 2.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.section-title {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--primary);
    font-size: 1.8rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid rgba(var(--primary-rgb), 0.2);
}

.desktop-comment-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 200px;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-input {
    padding: 1rem 1.2rem;
    border: 2px solid rgba(var(--primary-rgb), 0.2);
    border-radius: var(--border-radius);
    background: rgba(var(--primary-rgb), 0.03);
    color: var(--text);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}

.form-input:focus {
    border-color: var(--primary);
    background: rgba(var(--primary-rgb), 0.08);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.1);
}

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

.char-counter {
    align-self: flex-end;
    font-size: 0.9rem;
    color: var(--text);
    opacity: 0.7;
}

/* 表情选择器 */
.emoji-section {
    padding: 1.5rem;
    background: rgba(var(--secondary-rgb), 0.03);
    border-radius: var(--border-radius);
    border: 1px solid rgba(var(--secondary-rgb), 0.2);
}

.emoji-label {
    margin-bottom: 1rem;
    color: var(--secondary);
    font-weight: bold;
}

.emoji-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    gap: 0.8rem;
}

.emoji-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(var(--secondary-rgb), 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.2rem;
}

.emoji-btn:hover {
    background: var(--secondary);
    transform: scale(1.2);
    box-shadow: 0 4px 15px rgba(var(--secondary-rgb), 0.3);
}

/* 提交按钮 */
.submit-button {
    padding: 1.2rem 2.5rem;
    border: none;
    border-radius: var(--border-radius-lg);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    align-self: flex-start;
    box-shadow: var(--shadow);
}

.submit-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(var(--primary-rgb), 0.4);
}

/* 评论卡片 */
.comments-container {
    max-height: 600px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.desktop-comment-card {
    background: rgba(var(--primary-rgb), 0.03);
    border-radius: var(--border-radius);
    padding: 1.2rem;
    margin-bottom: 1rem;
    border-left: 4px solid var(--primary);
    transition: var(--transition);
    position: relative;
}

.desktop-comment-card:hover {
    background: rgba(var(--primary-rgb), 0.06);
    transform: translateX(5px);
    box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.1);
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.8rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(var(--primary-rgb), 0.1);
}

.comment-author {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary);
    font-weight: bold;
}

.comment-author .mood {
    font-size: 1.2rem;
}

.comment-time {
    font-size: 0.8rem;
    color: var(--text);
    opacity: 0.7;
}

.comment-content {
    margin: 1rem 0;
    line-height: 1.6;
    color: var(--text);
}

.comment-actions {
    display: flex;
    justify-content: flex-end;
}

.like-btn {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 20px;
    background: rgba(var(--accent-rgb), 0.1);
    color: var(--accent);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.like-btn:hover {
    background: var(--accent);
    color: white;
    transform: scale(1.05);
}

.no-comments {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text);
    opacity: 0.6;
}

.no-comments i {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* 查看更多按钮 */
.view-more {
    text-align: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(var(--primary-rgb), 0.2);
}

.view-more-btn {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0 auto;
}

.view-more-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.3);
}

/* 全局提示 */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--card-bg);
    color: var(--primary);
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transform: translateX(400px);
    opacity: 0;
    transition: var(--transition);
    z-index: 9999;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(var(--primary-rgb), 0.2);
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

/* 返回顶部 */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow);
}

.scroll-to-top.visible {
    opacity: 1;
    transform: translateY(0);
}

.scroll-to-top:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 8px 25px rgba(var(--primary-rgb), 0.4);
}

/* 自定义滚动条 */
.comments-container::-webkit-scrollbar,
.left-sidebar::-webkit-scrollbar,
.right-sidebar::-webkit-scrollbar {
    width: 6px;
}

.comments-container::-webkit-scrollbar-track,
.left-sidebar::-webkit-scrollbar-track,
.right-sidebar::-webkit-scrollbar-track {
    background: rgba(var(--primary-rgb), 0.1);
    border-radius: 3px;
}

.comments-container::-webkit-scrollbar-thumb,
.left-sidebar::-webkit-scrollbar-thumb,
.right-sidebar::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 3px;
}

.comments-container::-webkit-scrollbar-thumb:hover,
.left-sidebar::-webkit-scrollbar-thumb:hover,
.right-sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--secondary);
}

/* 动画效果 */
@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

@keyframes slideIn {
    from { transform: translateX(-30px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* 响应式设计 - 适配小一点的桌面屏幕 */
@media (max-width: 1400px) {
    .desktop-container {
        grid-template-columns: 280px 1fr 320px;
    }
    
    .main-content {
        padding: 2rem;
    }
    
    .left-sidebar,
    .right-sidebar {
        padding: 1rem;
    }
}

@media (max-width: 1200px) {
    .desktop-container {
        grid-template-columns: 250px 1fr 300px;
    }
    
    .main-title {
        font-size: clamp(2.5rem, 4vw, 3.5rem);
    }
    
    .form-row {
        grid-template-columns: 1fr 180px;
    }
}

/* 平板适配 - 切换到移动布局 */
@media (max-width: 1024px) {
    .desktop-container {
        display: block;
        padding-top: 70px;
    }
    
    .left-sidebar,
    .right-sidebar {
        display: none;
    }
    
    .main-content {
        max-width: 900px;
        margin: 0 auto;
        padding: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .emoji-grid {
        grid-template-columns: repeat(auto-fill, minmax(35px, 1fr));
    }
}

/* 特殊效果 */
.desktop-layout::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(var(--primary-rgb), 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(var(--secondary-rgb), 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* 文字选择样式 */
::selection {
    background: rgba(var(--primary-rgb), 0.3);
    color: var(--text);
}

::-moz-selection {
    background: rgba(var(--primary-rgb), 0.3);
    color: var(--text);
}