/* 基础样式和变量 */
:root {
    --primary-color: #4a90e2;
    --secondary-color: #f5f5f5;
    --text-color: #333;
    --bg-color: #fff;
    --border-color: #ddd;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* 移动端优化 */
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

/* 导航栏 */
.navbar {
    background-color: var(--navbar-bg, var(--primary-color));
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    transition: all 0.3s ease;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

/* 网站标题可编辑状态样式 */
#site-title[contenteditable="true"] {
    cursor: text;
    outline: none;
}

#site-title[contenteditable="true"]:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px dashed rgba(255, 255, 255, 0.5);
}

#site-title[contenteditable="true"]:focus {
    background-color: rgba(255, 255, 255, 0.15);
    border: 2px dashed rgba(255, 255, 255, 0.7);
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

#site-title.editable-hint {
    position: relative;
}

#site-title.editable-hint::after {
    content: '✏️';
    font-size: 0.8rem;
    margin-left: 0.5rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

#site-title.editable-hint:hover::after {
    opacity: 0.7;
}

/* 网站标题不可编辑状态 */
#site-title[contenteditable="false"] {
    cursor: default;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
    min-height: 44px; /* 触摸友好 */
    display: flex;
    align-items: center;
}

.nav-link:hover,
.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
}

.login-btn,
.logout-btn {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
    min-height: 44px; /* 触摸友好 */
    min-width: 60px;
}

.login-btn:hover,
.logout-btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.mobile-menu-btn .menu-icon {
    width: 25px;
    height: 3px;
    background-color: white;
    border-radius: 3px;
    transition: all 0.3s ease;
}

.mobile-menu-btn[aria-expanded="true"] .menu-icon:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.mobile-menu-btn[aria-expanded="true"] .menu-icon:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn[aria-expanded="true"] .menu-icon:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* 主题切换器 */
.theme-switcher {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.theme-btn {
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.theme-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow);
}

.theme-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.theme-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* 主题字大横幅 */
.hero-banner {
    background: linear-gradient(135deg, var(--hero-gradient-start, #667eea), var(--hero-gradient-end, #764ba2));
    padding: 8rem 2rem;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: bold;
    margin: 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    transition: all 0.3s;
}

.hero-title.editable:hover {
    outline: 2px dashed rgba(255, 255, 255, 0.5);
}

/* 功能区域 */
.feature-section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

/* 轮播图容器 */
.carousel-wrapper {
    position: relative;
    width: 100%;
}

.carousel-container {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: var(--shadow);
    background: rgba(0, 0, 0, 0.05);
}

/* 轮播图滑片容器 */
.carousel-slides {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 66.67%; /* 3:2 宽高比 */
    overflow: hidden;
}

/* 轮播图滑片 */
.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transform: scale(0.85); /* 非活动图片缩小 */
    transition: opacity 0.5s ease-in-out, transform 0.5s ease-in-out;
    pointer-events: none;
    z-index: 0;
}

.carousel-slide.active {
    opacity: 1;
    pointer-events: auto;
    z-index: 1;
    transform: scale(1.15); /* 放大当前显示的图片，更突出 */
    transition: opacity 0.5s ease-in-out, transform 0.5s ease-in-out;
    filter: brightness(1.05); /* 稍微增加亮度，更加突出 */
}

/* 轮播图图片 */
.carousel-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease-in-out, filter 0.5s ease-in-out;
}

/* 轮播图导航箭头 */
.carousel-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.9);
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.carousel-nav-btn:hover {
    background-color: rgba(255, 255, 255, 1);
    border-color: var(--primary-color, #4a90e2);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    transform: translateY(-50%) scale(1.1);
}

.carousel-nav-btn:active {
    transform: translateY(-50%) scale(0.95);
}

.carousel-prev-btn {
    left: 15px;
}

.carousel-next-btn {
    right: 15px;
}

.carousel-arrow {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color, #4a90e2);
    line-height: 1;
    user-select: none;
}

.carousel-nav-btn:hover .carousel-arrow {
    color: var(--primary-color, #4a90e2);
}

/* 轮播图指示器 */
.carousel-indicators {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
    padding: 8px;
    background-color: rgba(0, 0, 0, 0.3);
    border-radius: 20px;
    backdrop-filter: blur(5px);
}

.carousel-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    background-color: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
    outline: none;
}

.carousel-indicator:hover {
    background-color: rgba(255, 255, 255, 0.6);
    border-color: rgba(255, 255, 255, 0.8);
    transform: scale(1.2);
}

.carousel-indicator.active {
    background-color: var(--primary-color, #4a90e2);
    border-color: rgba(255, 255, 255, 0.9);
    width: 24px;
    border-radius: 6px;
    transform: scale(1.1);
}

.carousel-indicator:focus {
    outline: 2px solid var(--primary-color, #4a90e2);
    outline-offset: 2px;
}

/* 保留原有的编辑按钮位置 */
.feature-image-wrapper {
    position: relative;
}

.feature-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow);
    object-fit: cover;
}

.edit-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    z-index: 20;
    pointer-events: auto;
}

.edit-btn:hover {
    background-color: rgba(0, 0, 0, 0.9);
}

.feature-content {
    padding: 2rem;
}

.feature-title {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.feature-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
}

/* 可编辑内容样式 */
.editable {
    transition: all 0.3s;
}

.editable[contenteditable="true"] {
    outline: 2px dashed var(--primary-color);
    background-color: rgba(74, 144, 226, 0.1);
    padding: 0.5rem;
    border-radius: 4px;
}

.editable[contenteditable="true"]:focus {
    outline: 2px solid var(--primary-color);
    background-color: rgba(74, 144, 226, 0.2);
}

/* 可编辑元素提示样式（虚线边框） */
.editable-hint {
    border: 2px dashed var(--primary-color) !important;
    padding: 0.3rem 0.5rem !important;
    border-radius: 4px !important;
    transition: all 0.3s ease !important;
}

.editable-hint:hover {
    border-style: solid !important;
    background-color: rgba(74, 144, 226, 0.05) !important;
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.1) !important;
}

/* 时间轴 */
.timeline-container {
    max-width: 800px;
    margin: 0 auto;
}

.timeline-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-color);
}

.timeline-posts {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.timeline-post {
    background-color: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.timeline-post:hover {
    transform: translateY(-5px);
}

/* 置顶说说样式 */
.timeline-post.post-pinned {
    border: 3px solid #ffd700;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), var(--bg-color));
    box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3), var(--shadow);
    position: relative;
}

.timeline-post.post-pinned::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #ffd700, #ffed4e, #ffd700);
    border-radius: 12px 12px 0 0;
}

.post-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.post-header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.post-date {
    color: #666;
    font-size: 0.9rem;
}

/* 置顶徽章 */
.pinned-badge-post {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: #333;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: bold;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    box-shadow: 0 2px 6px rgba(255, 215, 0, 0.4);
    animation: pulsePin 2s ease-in-out infinite;
}

@keyframes pulsePin {
    0%, 100% {
        box-shadow: 0 2px 6px rgba(255, 215, 0, 0.4);
    }
    50% {
        box-shadow: 0 2px 12px rgba(255, 215, 0, 0.6);
    }
}

/* 说说操作按钮容器 */
.post-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* 置顶按钮 */
.btn-pin-post {
    background-color: rgba(255, 215, 0, 0.2);
    color: #ffd700;
    border: 1px solid rgba(255, 215, 0, 0.5);
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s ease;
    white-space: nowrap;
    font-weight: 500;
}

.btn-pin-post:hover {
    background-color: rgba(255, 215, 0, 0.4);
    color: #fff;
    border-color: #ffd700;
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(255, 215, 0, 0.3);
}

.delete-post {
    background-color: #e74c3c;
    color: white;
    border: none;
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.delete-post:hover {
    background-color: #c0392b;
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(231, 76, 60, 0.3);
}

.post-content {
    margin-bottom: 1rem;
    color: var(--text-color);
    line-height: 1.8;
}

.post-image {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    border-radius: 8px;
    margin-top: 1rem;
}

.add-post-btn {
    text-align: center;
    margin-top: 2rem;
}

/* 发布说说区域 */
.publish-section {
    margin-bottom: 3rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.timeline-post-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.timeline-post-input {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    min-height: 120px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.timeline-post-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.timeline-publish-btn {
    align-self: flex-end;
    min-width: 120px;
}

/* 查看更多链接容器 */
.view-more-container {
    text-align: center;
    margin-top: 2rem;
    padding: 1.5rem;
}

.view-more-link {
    display: inline-block;
    color: var(--primary-color, #4a90e2);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 500;
    padding: 0.8rem 2rem;
    border: 2px solid var(--primary-color, #4a90e2);
    border-radius: 8px;
    transition: all 0.3s ease;
    background-color: rgba(255, 255, 255, 0.8);
}

.view-more-link:hover {
    background-color: var(--primary-color, #4a90e2);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
}

.view-more-link:active {
    transform: translateY(0);
}

/* 说说高亮样式 */
.timeline-post.post-highlighted {
    animation: postHighlight 0.5s ease-out;
    box-shadow: 0 0 20px rgba(74, 144, 226, 0.5) !important;
    transform: scale(1.02);
    transition: all 0.3s ease;
}

@keyframes postHighlight {
    0% {
        box-shadow: 0 0 0 rgba(74, 144, 226, 0);
    }
    50% {
        box-shadow: 0 0 30px rgba(74, 144, 226, 0.8);
    }
    100% {
        box-shadow: 0 0 20px rgba(74, 144, 226, 0.5);
    }
}

/* 轮播图响应式设计 */
@media (max-width: 768px) {
    .carousel-nav-btn {
        width: 40px;
        height: 40px;
    }
    
    .carousel-arrow {
        font-size: 1.5rem;
    }
    
    .carousel-prev-btn {
        left: 10px;
    }
    
    .carousel-next-btn {
        right: 10px;
    }
    
    .carousel-indicators {
        bottom: 10px;
        gap: 6px;
        padding: 6px;
    }
    
    .carousel-indicator {
        width: 10px;
        height: 10px;
    }
    
    .carousel-indicator.active {
        width: 20px;
    }
}


/* 页脚 */
.footer {
    background-color: var(--footer-bg, #2c3e50);
    color: white;
    padding: 3rem 2rem;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.social-link {
    color: white;
    text-decoration: none;
    padding: 0.5rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.social-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.message-board {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message-input {
    width: 100%;
    padding: 1rem;
    border-radius: 8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    min-height: 100px;
    transition: all 0.3s ease;
}

.message-input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.message-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.messages-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-height: 300px;
    overflow-y: auto;
}

.message-item {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
    animation: fadeInMessage 0.3s ease-out;
    position: relative;
}

.message-item:hover {
    background-color: rgba(255, 255, 255, 0.15);
    transform: translateX(5px);
}

/* 置顶留言样式 */
.message-item.message-pinned {
    border-left-color: #ffd700;
    background-color: rgba(255, 215, 0, 0.15);
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.2);
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.pinned-badge {
    background-color: #ffd700;
    color: #333;
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: bold;
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
}

.message-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-pin,
.btn-delete-message {
    padding: 0.4rem 0.8rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-pin {
    background-color: rgba(255, 215, 0, 0.3);
    color: #ffd700;
    border: 1px solid rgba(255, 215, 0, 0.5);
}

.btn-pin:hover {
    background-color: rgba(255, 215, 0, 0.5);
    color: #fff;
    transform: translateY(-1px);
}

.btn-delete-message {
    background-color: rgba(231, 76, 60, 0.3);
    color: #e74c3c;
    border: 1px solid rgba(231, 76, 60, 0.5);
}

.btn-delete-message:hover {
    background-color: rgba(231, 76, 60, 0.5);
    color: #fff;
    transform: translateY(-1px);
}

.message-item .message-text {
    color: rgba(255, 255, 255, 0.95);
    line-height: 1.6;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.message-item .message-time {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 0.5rem;
    font-style: italic;
}

/* 留言淡入动画 */
@keyframes fadeInMessage {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 成功提示动画 */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* 按钮样式 */
.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    will-change: transform;
}

.btn-primary:hover {
    background-color: #357abd;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s;
}

.modal.show {
    display: flex;
    justify-content: center;
    align-items: center;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideDown 0.3s;
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    color: #999;
    background: none;
    border: none;
    padding: 0.5rem;
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s;
}

.close:hover {
    color: #333;
    background-color: rgba(0, 0, 0, 0.05);
}

.close:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.modal-content h2 {
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: bold;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.error-message {
    color: #e74c3c;
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.image-preview {
    max-width: 100%;
    max-height: 200px;
    margin-top: 1rem;
    border-radius: 8px;
    display: block;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* 说说图片上传区域 */
.timeline-image-upload {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.image-upload-label {
    display: inline-block;
    cursor: pointer;
    padding: 0.5rem 1rem;
    background-color: var(--primary-color, #4a90e2);
    color: white;
    border-radius: 6px;
    text-align: center;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    user-select: none;
}

.image-upload-label:hover {
    background-color: var(--primary-color-dark, #357abd);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.image-upload-label:active {
    transform: translateY(0);
}

.timeline-image-upload input[type="file"] {
    display: none;
}

.timeline-image-upload .image-preview {
    margin-top: 0.5rem;
    max-height: 300px;
    width: auto;
    border: 2px solid var(--border-color);
}

/* 说说中的图片样式 */
.post-image {
    max-width: 100%;
    max-height: 400px;
    margin-top: 1rem;
    border-radius: 8px;
    display: block;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* 轮播图管理样式 */
.carousel-manage-container {
    max-height: 60vh;
    overflow-y: auto;
    padding: 1rem 0;
}

.carousel-image-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.carousel-manage-item {
    background-color: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.carousel-manage-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.carousel-item-preview {
    position: relative;
    width: 100%;
    padding-bottom: 75%; /* 4:3 宽高比 */
    overflow: hidden;
    border-radius: 8px;
    background-color: rgba(0, 0, 0, 0.05);
    margin-bottom: 1rem;
}

.carousel-item-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

.carousel-item-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
    border-radius: 8px;
}

.carousel-item-preview:hover .carousel-item-overlay {
    opacity: 1;
}

.btn-remove-image {
    padding: 0.5rem 1rem;
    background-color: #e74c3c;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}

.btn-remove-image:hover {
    background-color: #c0392b;
}

.carousel-item-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.carousel-item-info label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-color);
}

.carousel-item-description {
    width: 100%;
    padding: 0.5rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.9rem;
    resize: vertical;
    min-height: 60px;
    transition: border-color 0.3s;
}

.carousel-item-description:focus {
    outline: none;
    border-color: var(--primary-color);
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 2px solid var(--border-color);
}

.btn-secondary {
    padding: 0.75rem 1.5rem;
    background-color: #6c757d;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

/* 信封图标样式 */
.envelope-icon {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), #5ba3f5);
    border: none;
    border-radius: 50%;
    font-size: 2rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    animation: envelopeFloat 3s ease-in-out infinite;
}

.envelope-icon:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.envelope-icon:active {
    transform: scale(0.95);
}

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

/* 信封模态框样式 */
.envelope-modal-content {
    max-width: 600px;
    background: linear-gradient(135deg, var(--bg-color), rgba(255, 255, 255, 0.95));
    border: 2px solid var(--primary-color);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.envelope-title {
    text-align: center;
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    font-weight: bold;
}

.envelope-text {
    background-color: rgba(255, 255, 255, 0.8);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    line-height: 1.8;
    font-size: 1rem;
    color: var(--text-color);
    text-align: justify;
    max-height: 400px;
    overflow-y: auto;
}

.envelope-text p {
    margin: 0;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* 信封按钮触摸优化 */
.envelope-icon {
    min-width: 60px;
    min-height: 60px;
    -webkit-tap-highlight-color: transparent;
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 移动端菜单 */
    .mobile-menu-btn {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 60px;
        right: -100%;
        width: 280px;
        height: calc(100vh - 60px);
        background-color: var(--navbar-bg, var(--primary-color));
        flex-direction: column;
        align-items: stretch;
        padding: 1.5rem;
        gap: 1rem;
        transition: right 0.3s ease;
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.2);
        overflow-y: auto;
        z-index: 1000;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-link {
        width: 100%;
        padding: 1rem;
        justify-content: center;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .login-btn,
    .logout-btn {
        width: 100%;
        margin-top: 1rem;
    }

    .feature-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2rem;
        padding: 0 1rem;
    }

    .hero-banner {
        padding: 4rem 1rem;
    }

    .theme-switcher {
        position: relative;
        top: 0;
        right: 0;
        flex-direction: row;
        justify-content: center;
        padding: 1rem;
        background-color: var(--bg-color);
        flex-wrap: wrap;
    }

    .nav-container {
        padding: 0 1rem;
    }

    .feature-section {
        padding: 2rem 1rem;
    }

    .timeline-container {
        padding: 0 1rem;
    }

    .publish-section {
        padding: 1rem;
    }

    .modal-content {
        width: 95%;
        padding: 1.5rem;
        max-height: 95vh;
        margin: 1rem auto;
    }

    /* 按钮触摸优化 */
button,
.btn-primary,
.btn-secondary {
    min-height: 44px;
    min-width: 44px;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    /* 触摸优化 */
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
    touch-action: manipulation;
    user-select: none;
}

    /* 输入框触摸优化 */
    input[type="text"],
    input[type="password"],
    textarea {
        font-size: 16px; /* 防止iOS自动缩放 */
        padding: 0.75rem;
        min-height: 44px;
        -webkit-appearance: none;
        border-radius: 4px;
    }
    
    /* 防止iOS输入框聚焦时的样式 */
    input:focus,
    textarea:focus {
        outline: none;
        -webkit-tap-highlight-color: transparent;
    }

    /* 轮播图优化 */
    .carousel-container {
        height: 300px;
        touch-action: pan-y pinch-zoom; /* 允许垂直滚动和缩放 */
    }

    .carousel-description {
        font-size: 0.9rem;
        padding: 0.75rem;
    }
    
    /* 轮播图导航按钮优化 */
    .carousel-nav-btn {
        min-width: 44px;
        min-height: 44px;
    }
    
    /* 轮播图指示器优化 */
    .carousel-indicator {
        min-width: 24px;
        min-height: 24px;
    }
}

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

    .hero-title {
        font-size: 1.5rem;
        line-height: 1.4;
    }

    .hero-banner {
        padding: 3rem 1rem;
    }

    .timeline-title {
        font-size: 1.75rem;
    }

    .theme-btn {
        font-size: 0.8rem;
        padding: 0.5rem 0.8rem;
        min-height: 40px;
    }

    .theme-switcher {
        gap: 0.5rem;
        padding: 0.75rem;
    }

    .message-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .message-actions {
        width: 100%;
        justify-content: flex-end;
        gap: 0.5rem;
    }

    .btn-pin,
    .btn-delete-message {
        font-size: 0.85rem;
        padding: 0.5rem 0.75rem;
        min-height: 40px;
    }

    /* 说说卡片优化 */
    .timeline-post {
        padding: 1rem;
        margin-bottom: 1rem;
    }

    .timeline-post-text {
        font-size: 0.95rem;
        line-height: 1.6;
    }

    /* 轮播图小屏幕优化 */
    .carousel-container {
        height: 250px;
    }

    .carousel-description {
        font-size: 0.85rem;
        padding: 0.5rem;
    }

    /* 模态框优化 */
    .modal-content {
        width: 98%;
        padding: 1rem;
        margin: 0.5rem auto;
    }

    /* 表单优化 */
    .form-group {
        margin-bottom: 1rem;
    }

    .form-group label {
        font-size: 0.95rem;
        margin-bottom: 0.5rem;
    }

    /* 图片上传优化 */
    .image-upload-label {
        padding: 1rem;
        min-height: 44px;
    }
    
    /* 信封图标移动端优化 */
    .envelope-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        bottom: 20px;
        left: 20px;
    }
    
    .envelope-modal-content {
        max-width: 95%;
        padding: 1.5rem;
    }
    
    .envelope-text {
        max-height: 300px;
        padding: 1rem;
        font-size: 0.95rem;
    }
}

/* ========== 主题样式 ========== */

/* 可爱风主题 */
body.theme-cute {
    --primary-color: #ff9ec4;
    --secondary-color: #fff0f5;
    --text-color: #4a4a4a;
    --bg-color: #fff5f8;
    --border-color: #ffd1e0;
    --navbar-bg: #ff9ec4;
    --footer-bg: #ffb6d5;
    --hero-gradient-start: #ff9ec4;
    --hero-gradient-end: #ffc0d9;
}

body.theme-cute .hero-banner::before {
    content: '🐱';
    position: absolute;
    font-size: 5rem;
    opacity: 0.3;
    top: 20px;
    left: 20px;
    animation: float 3s ease-in-out infinite;
}

body.theme-cute .hero-banner::after {
    content: '🐾';
    position: absolute;
    font-size: 3rem;
    opacity: 0.3;
    bottom: 20px;
    right: 20px;
    animation: float 3s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* 抑郁风主题 */
body.theme-depressed {
    --primary-color: #5a5a5a;
    --secondary-color: #2a2a2a;
    --text-color: #ccc;
    --bg-color: #1a1a1a;
    --border-color: #3a3a3a;
    --navbar-bg: #2a2a2a;
    --footer-bg: #1a1a1a;
    --hero-gradient-start: #2c2c2c;
    --hero-gradient-end: #1a1a1a;
}

body.theme-depressed .hero-title {
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8);
}

body.theme-depressed .timeline-post {
    background-color: #2a2a2a;
    border-color: #3a3a3a;
}

/* 阳光风主题 */
body.theme-sunny {
    --primary-color: #ffa500;
    --secondary-color: #fff8e1;
    --text-color: #5a4a3a;
    --bg-color: #fffbf0;
    --border-color: #ffd700;
    --navbar-bg: #ffa500;
    --footer-bg: #ff8c00;
    --hero-gradient-start: #ffd700;
    --hero-gradient-end: #ffa500;
}

body.theme-sunny .hero-banner::before {
    content: '☀️';
    position: absolute;
    font-size: 4rem;
    opacity: 0.5;
    top: 30px;
    right: 30px;
    animation: rotate 10s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* 星月夜风格主题 */
body.theme-starry {
    --primary-color: #6b46c1;
    --secondary-color: #ede9fe;
    --text-color: #1e1b4b;
    --bg-color: #0f172a;
    --border-color: #4c1d95;
    --navbar-bg: #312e81;
    --footer-bg: #1e1b4b;
    --hero-gradient-start: #312e81;
    --hero-gradient-end: #1e1b4b;
}

body.theme-starry .hero-banner {
    background: linear-gradient(135deg, #1e1b4b, #312e81);
    position: relative;
    overflow: hidden;
}

body.theme-starry .hero-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, #fff, transparent),
        radial-gradient(2px 2px at 60px 70px, #fff, transparent),
        radial-gradient(1px 1px at 50px 50px, #fff, transparent),
        radial-gradient(1px 1px at 80px 10px, #fff, transparent),
        radial-gradient(2px 2px at 90px 40px, #fff, transparent),
        radial-gradient(1px 1px at 33px 90px, #fff, transparent),
        radial-gradient(2px 2px at 40px 60px, #fff, transparent);
    background-repeat: repeat;
    background-size: 100px 100px;
    opacity: 0.5;
    animation: twinkle 3s ease-in-out infinite;
}

body.theme-starry .hero-banner::after {
    content: '🌙';
    position: absolute;
    font-size: 4rem;
    top: 30px;
    right: 30px;
    opacity: 0.7;
}

@keyframes twinkle {
    0%, 100% {
        opacity: 0.5;
    }
    50% {
        opacity: 0.8;
    }
}

body.theme-starry .hero-title {
    color: #fff;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

/* ========== 新的主题类样式（使用 .theme 类名） ========== */

/* 可爱风主题 - .cute-theme */
.cute-theme {
    --primary-color: #ff9ec4;
    --secondary-color: #ffeef5;
    --text-color: #5a4a5a;
    --bg-color: #fff5f9;
    --border-color: #ffd1e0;
    --navbar-bg: #ffb3d1;
    --footer-bg: #ffcce0;
    --hero-gradient-start: #ffb3d1;
    --hero-gradient-end: #ffcce0;
    
    /* 圆润字体设置 */
    font-family: 'Comic Sans MS', '微软雅黑', 'STHeiti', 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', cursive, sans-serif;
    
    /* 柔和的粉色渐变背景 */
    background: linear-gradient(135deg, #fff5f9 0%, #ffeef5 50%, #fff0f8 100%);
    background-image: 
        radial-gradient(circle at 15% 25%, rgba(255, 179, 209, 0.15) 0%, transparent 60%),
        radial-gradient(circle at 85% 75%, rgba(255, 204, 224, 0.15) 0%, transparent 60%),
        radial-gradient(circle at 50% 50%, rgba(255, 209, 224, 0.08) 0%, transparent 70%);
    background-attachment: fixed;
    min-height: 100vh;
    position: relative;
}

/* 在页面右下角添加可爱的猫猫图标装饰 */
.cute-theme::after {
    content: '🐱';
    position: fixed;
    bottom: 20px;
    right: 20px;
    font-size: 4rem;
    opacity: 0.4;
    z-index: 100;
    pointer-events: none;
    animation: cuteFloat 4s ease-in-out infinite;
    filter: drop-shadow(0 4px 8px rgba(255, 158, 196, 0.3));
    transition: transform 0.3s ease;
}

.cute-theme::after:hover {
    transform: scale(1.1) rotate(5deg);
    opacity: 0.6;
}

/* 猫猫浮动动画 */
@keyframes cuteFloat {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-10px) rotate(-5deg);
    }
    50% {
        transform: translateY(-15px) rotate(0deg);
    }
    75% {
        transform: translateY(-10px) rotate(5deg);
    }
}

/* 在页面左上角添加小爪子装饰 */
.cute-theme::before {
    content: '🐾';
    position: fixed;
    top: 80px;
    left: 20px;
    font-size: 2rem;
    opacity: 0.25;
    z-index: 100;
    pointer-events: none;
    animation: pawBounce 3s ease-in-out infinite;
}

@keyframes pawBounce {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-8px) scale(1.1);
    }
}

/* 标题横幅样式 */
.cute-theme .hero-banner {
    background: linear-gradient(135deg, var(--hero-gradient-start), var(--hero-gradient-end));
    position: relative;
    box-shadow: 0 4px 20px rgba(255, 179, 209, 0.3);
}

.cute-theme .hero-banner::before {
    content: '🐱';
    position: absolute;
    font-size: 5rem;
    opacity: 0.35;
    top: 20px;
    left: 30px;
    animation: float 3s ease-in-out infinite;
    filter: drop-shadow(0 2px 4px rgba(255, 255, 255, 0.5));
}

.cute-theme .hero-banner::after {
    content: '🐾';
    position: absolute;
    font-size: 3rem;
    opacity: 0.3;
    bottom: 20px;
    right: 30px;
    animation: float 3s ease-in-out infinite reverse;
}

.cute-theme .hero-title {
    font-weight: 600;
    letter-spacing: 1px;
    text-shadow: 2px 2px 8px rgba(255, 255, 255, 0.6);
    color: #fff;
}

/* 导航栏样式 */
.cute-theme .navbar {
    background: linear-gradient(135deg, var(--navbar-bg), #ff9ec4);
    box-shadow: 0 4px 16px rgba(255, 179, 209, 0.35);
    border-bottom: 3px solid rgba(255, 255, 255, 0.3);
}

.cute-theme .navbar .logo {
    font-weight: bold;
    text-shadow: 1px 1px 2px rgba(255, 255, 255, 0.5);
}

/* 时间轴帖子样式 */
.cute-theme .timeline-post {
    background: linear-gradient(135deg, #ffffff, #fff5f9);
    border: 3px dashed var(--border-color);
    border-radius: 20px;
    box-shadow: 0 4px 12px rgba(255, 209, 224, 0.4);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cute-theme .timeline-post::before {
    content: '💕';
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 1.2rem;
    opacity: 0.3;
}

.cute-theme .timeline-post:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 18px rgba(255, 179, 209, 0.5);
    border-color: var(--primary-color);
}

/* 可爱风主题 - 置顶说说样式 */
.cute-theme .timeline-post.post-pinned {
    border: 3px solid #ffd700;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), #fff5f9);
    box-shadow: 0 4px 16px rgba(255, 215, 0, 0.4), 0 4px 12px rgba(255, 209, 224, 0.4);
}

.cute-theme .timeline-post.post-pinned::before {
    content: '⭐';
    opacity: 0.5;
}

/* 按钮样式 */
.cute-theme .btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #ffb3d1);
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 25px;
    box-shadow: 0 4px 12px rgba(255, 158, 196, 0.4);
    font-weight: 600;
    transition: all 0.3s ease;
}

.cute-theme .btn-primary:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 16px rgba(255, 158, 196, 0.6);
}

/* 主题切换按钮 */
.cute-theme .theme-btn {
    border-radius: 20px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.cute-theme .theme-btn.active {
    background: linear-gradient(135deg, var(--primary-color), #ffb3d1);
    box-shadow: 0 4px 12px rgba(255, 158, 196, 0.4);
}

/* 功能区域样式 */
.cute-theme .feature-section {
    background: rgba(255, 255, 255, 0.5);
    border-radius: 20px;
    margin: 2rem auto;
    padding: 3rem 2rem;
    box-shadow: 0 4px 16px rgba(255, 209, 224, 0.2);
}

.cute-theme .feature-title {
    color: var(--text-color);
    font-weight: 600;
    text-shadow: 1px 1px 2px rgba(255, 209, 224, 0.3);
}

.cute-theme .feature-text {
    color: var(--text-color);
    line-height: 1.8;
    font-size: 1.05rem;
}

/* 页脚样式 */
.cute-theme .footer {
    background: linear-gradient(135deg, var(--footer-bg), #ffd1e0);
    border-top: 3px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 -4px 16px rgba(255, 179, 209, 0.3);
}

/* 可编辑元素提示 */
.cute-theme .editable-hint {
    border: 3px dashed var(--primary-color) !important;
    background: rgba(255, 209, 224, 0.15) !important;
    border-radius: 12px !important;
}

/* 模态框样式 */
.cute-theme .modal-content {
    background: linear-gradient(135deg, #ffffff, #fff5f9);
    border: 3px solid var(--border-color);
    box-shadow: 0 8px 24px rgba(255, 158, 196, 0.4);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .cute-theme::after {
        font-size: 3rem;
        bottom: 15px;
        right: 15px;
    }
    
    .cute-theme::before {
        font-size: 1.5rem;
        top: 70px;
        left: 15px;
    }
}

/* 抑郁风主题 - .depress-theme */
.depress-theme {
    --primary-color: #5a5a5a;
    --secondary-color: #2a2a2a;
    --text-color: #bbb;
    --bg-color: #1a1a1a;
    --border-color: #3a3a3a;
    --navbar-bg: #1a1a1a;
    --footer-bg: #0f0f0f;
    --hero-gradient-start: #2c2c2c;
    --hero-gradient-end: #1a1a1a;
    
    font-family: 'Times New Roman', 'SimSun', serif;
    background-color: #1a1a1a;
    background-image: 
        repeating-linear-gradient(45deg, transparent, transparent 2px, rgba(58, 58, 58, 0.1) 2px, rgba(58, 58, 58, 0.1) 4px);
}

.depress-theme .hero-banner {
    background: linear-gradient(135deg, var(--hero-gradient-start), var(--hero-gradient-end));
    position: relative;
}

.depress-theme .hero-banner::before {
    content: '☁️';
    position: absolute;
    font-size: 4rem;
    opacity: 0.2;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: float 4s ease-in-out infinite;
}

.depress-theme .hero-title {
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8);
    font-weight: 300;
    letter-spacing: 2px;
}

.depress-theme .navbar {
    background-color: var(--navbar-bg);
    border-bottom: 1px solid var(--border-color);
}

.depress-theme .timeline-post {
    background-color: #2a2a2a;
    border-color: var(--border-color);
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
}

/* 抑郁风主题 - 置顶说说样式 */
.depress-theme .timeline-post.post-pinned {
    border: 3px solid rgba(255, 215, 0, 0.6);
    background-color: #3a3a2a;
    box-shadow: 0 0 15px rgba(255, 215, 0, 0.3), inset 0 0 10px rgba(0, 0, 0, 0.5);
}

/* 阳光风主题 - .sunny-theme */
.sunny-theme {
    --primary-color: #ffa500;
    --secondary-color: #fff8e1;
    --text-color: #5a4a3a;
    --bg-color: #fffbf0;
    --border-color: #ffd700;
    --navbar-bg: #ffa500;
    --footer-bg: #ff8c00;
    --hero-gradient-start: #ffd700;
    --hero-gradient-end: #ffa500;
    
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    background-color: #fffbf0;
    background-image: 
        radial-gradient(circle at 50% 0%, rgba(255, 215, 0, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 0% 100%, rgba(255, 165, 0, 0.1) 0%, transparent 50%);
}

.sunny-theme .hero-banner {
    background: linear-gradient(135deg, var(--hero-gradient-start), var(--hero-gradient-end));
    position: relative;
}

.sunny-theme .hero-banner::before {
    content: '☀️';
    position: absolute;
    font-size: 6rem;
    opacity: 0.4;
    top: 20px;
    right: 30px;
    animation: rotate 15s linear infinite;
}

.sunny-theme .hero-banner::after {
    content: '✨';
    position: absolute;
    font-size: 2rem;
    opacity: 0.3;
    top: 60px;
    left: 40px;
    animation: float 3s ease-in-out infinite;
}

.sunny-theme .hero-title {
    text-shadow: 2px 2px 4px rgba(255, 215, 0, 0.5);
    font-weight: bold;
}

.sunny-theme .navbar {
    background: linear-gradient(135deg, #ffa500, #ff8c00);
    box-shadow: 0 4px 12px rgba(255, 165, 0, 0.4);
}

.sunny-theme .timeline-post {
    background: linear-gradient(135deg, #fff, #fffbf0);
    border: 2px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.2);
}

/* 阳光风主题 - 置顶说说样式 */
.sunny-theme .timeline-post.post-pinned {
    border: 3px solid #ffd700;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), #fffbf0);
    box-shadow: 0 4px 16px rgba(255, 215, 0, 0.4), 0 4px 12px rgba(255, 215, 0, 0.3);
}

/* 星月夜风格主题 - .starry-theme */
.starry-theme {
    --primary-color: #6b46c1;
    --secondary-color: #ede9fe;
    --text-color: #e0d5ff;
    --bg-color: #0f172a;
    --border-color: #4c1d95;
    --navbar-bg: #312e81;
    --footer-bg: #1e1b4b;
    --hero-gradient-start: #312e81;
    --hero-gradient-end: #1e1b4b;
    
    font-family: 'Georgia', 'SimSun', serif;
    background-color: #0f172a;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, rgba(255, 255, 255, 0.3), transparent),
        radial-gradient(2px 2px at 60px 70px, rgba(255, 255, 255, 0.2), transparent),
        radial-gradient(1px 1px at 50px 50px, rgba(255, 255, 255, 0.3), transparent),
        radial-gradient(1px 1px at 80px 10px, rgba(255, 255, 255, 0.2), transparent);
    background-size: 200px 200px;
    background-position: 0 0, 100px 100px, 50px 50px, 150px 150px;
}

.starry-theme .hero-banner {
    background: linear-gradient(135deg, var(--hero-gradient-start), var(--hero-gradient-end));
    position: relative;
    overflow: hidden;
}

.starry-theme .hero-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, #fff, transparent),
        radial-gradient(2px 2px at 60px 70px, #fff, transparent),
        radial-gradient(1px 1px at 50px 50px, #fff, transparent),
        radial-gradient(1px 1px at 80px 10px, #fff, transparent),
        radial-gradient(2px 2px at 90px 40px, #fff, transparent),
        radial-gradient(1px 1px at 33px 90px, #fff, transparent),
        radial-gradient(2px 2px at 40px 60px, #fff, transparent);
    background-repeat: repeat;
    background-size: 100px 100px;
    opacity: 0.6;
    animation: twinkle 3s ease-in-out infinite;
    pointer-events: none; /* 允许点击穿透，不阻挡交互 */
    z-index: 0;
}

.starry-theme .hero-banner::after {
    content: '🌙';
    position: absolute;
    font-size: 5rem;
    top: 20px;
    right: 30px;
    opacity: 0.8;
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.5));
    pointer-events: none; /* 允许点击穿透，不阻挡交互 */
    z-index: 0;
}

.starry-theme .hero-title {
    color: #fff;
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.6), 0 0 30px rgba(107, 70, 193, 0.8);
    font-weight: 300;
    letter-spacing: 3px;
    position: relative;
    z-index: 1; /* 确保标题在装饰元素之上 */
}

.starry-theme .navbar {
    background: linear-gradient(135deg, #312e81, #1e1b4b);
    box-shadow: 0 4px 12px rgba(107, 70, 193, 0.5);
}

.starry-theme .timeline-post {
    background: linear-gradient(135deg, #1e1b4b, #0f172a);
    border-color: var(--border-color);
    box-shadow: 0 0 15px rgba(107, 70, 193, 0.3);
    color: var(--text-color);
}

/* 星月夜主题 - 置顶说说样式 */
.starry-theme .timeline-post.post-pinned {
    border: 3px solid rgba(255, 215, 0, 0.7);
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), #1e1b4b, #0f172a);
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.4), 0 0 15px rgba(107, 70, 193, 0.3);
}

/* 星月夜主题可编辑元素样式 */
.starry-theme .editable-hint {
    border: 2px dashed var(--primary-color) !important;
    background-color: rgba(107, 70, 193, 0.15) !important;
    border-radius: 4px !important;
}

.starry-theme .hero-title.editable-hint {
    background-color: rgba(107, 70, 193, 0.2) !important;
    outline: 2px dashed var(--primary-color) !important;
}

.starry-theme .editable[contenteditable="true"]:focus {
    outline: 2px solid var(--primary-color) !important;
    background-color: rgba(107, 70, 193, 0.25) !important;
}