/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 莫兰迪色系基础样式 */
:root {
    --primary-color: #d6c2ba;
    --secondary-color: #a0c4c6;
    --accent-color: #e8b39e;
    --text-color: #5a5a5a;
    --light-text: #8d8d8d;
    --background-color: #faf7f5;
    --card-bg: #ffffff;
    --border-color: #f0ebe7;
    --shadow-color: rgba(0, 0, 0, 0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', 'Noto Sans SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--background-color);
    background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23d6c2ba' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    font-synthesis: none;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 主容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 40px 80px;
    position: relative;
}

/* 页面头部 */
.header {
    text-align: center;
    margin-bottom: 60px;
    padding: 40px 20px;
    position: relative;
}

.title {
    font-size: 2.4rem;
    color: var(--text-color);
    margin-bottom: 20px;
    font-weight: 500;
    letter-spacing: 0.5px;
    line-height: 1.3;
}

.heart-icon {
    color: var(--accent-color);
    margin: 0 15px;
    font-size: 1.8rem;
    transition: var(--transition);
}

.heart-icon:hover {
    transform: scale(1.1);
    opacity: 0.8;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--light-text);
    font-weight: 400;
    letter-spacing: 0.3px;
    line-height: 1.6;
}

/* 上传区域 */
.upload-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    padding: 25px 35px;
    border-radius: 8px;
    margin-bottom: 60px;
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.upload-btn {
    background: var(--card-bg);
    color: var(--text-color);
    padding: 12px 24px;
    border-radius: 3px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: relative;
}

.upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.tag-filter select {
    padding: 10px 18px;
    border-radius: 3px;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    font-size: 0.95rem;
    font-family: inherit;
    cursor: pointer;
    outline: none;
    transition: var(--transition);
    color: var(--text-color);
    min-width: 160px;
}

.tag-filter select:hover {
    border-color: var(--primary-color);
}

.tag-filter select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(214, 194, 186, 0.2);
}

/* 照片网格 */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 40px;
    margin-bottom: 80px;
    perspective: 1000px;
}

.photo-card {
    background: var(--card-bg);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.07);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transform-style: preserve-3d;
    display: flex;
    flex-direction: column;
}

.photo-card:hover {
    transform: translateY(-8px) rotateX(2deg);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.photo-card:active {
    transform: translateY(-4px) rotateX(1deg);
}

.photo-card img {
    width: 100%;
    height: 240px;
    object-fit: cover;
    display: block;
    transition: filter 0.5s ease, transform 0.5s ease;
    border-radius: 8px;
    filter: blur(2px);
    opacity: 0.9;
}

.photo-card img.loaded {
    filter: blur(0);
    opacity: 1;
}

.photo-card:hover img {
    transform: scale(1.03);
}

.photo-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.5));
    color: white;
    padding: 15px 18px;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    transform: translateY(10px);
    z-index: 2;
    backdrop-filter: blur(2px);
}

.photo-card:hover .photo-overlay {
    opacity: 1;
    transform: translateY(0);
}

.photo-note {
    font-size: 0.9rem;
    margin-bottom: 6px;
    font-weight: 400;
    line-height: 1.4;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.photo-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.tag {
    background: rgba(255, 255, 255, 0.2);
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    backdrop-filter: blur(4px);
    transition: var(--transition);
    font-weight: 400;
    letter-spacing: 0.3px;
}

.tag.date { background: rgba(214, 194, 186, 0.6); }
.tag.travel { background: rgba(160, 196, 198, 0.6); }
.tag.daily { background: rgba(232, 179, 158, 0.6); }
.tag.special { background: rgba(180, 180, 180, 0.6); }

/* 照片日期水印 */
.photo-date {
    position: absolute;
    top: 10px;
    right: 10px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.7rem;
    font-style: italic;
    transform: rotate(10deg);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 1;
}

.photo-card:hover .photo-date {
    opacity: 1;
}

/* 照片查看器 */
.photo-viewer {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(250, 247, 245, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0s linear 0.5s;
    backdrop-filter: blur(8px);
}

.photo-viewer.active {
    opacity: 1;
    visibility: visible;
    transition-delay: 0s;
}

.viewer-content {
    position: relative;
    width: 90%;
    max-width: 900px;
    max-height: 95vh;
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: scale(1.05) translateY(20px);
    opacity: 0;
    transition: transform 0.5s ease, opacity 0.5s ease;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
}

.photo-viewer.active .viewer-content {
    transform: scale(1) translateY(0);
    opacity: 1;
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    font-size: 1.4rem;
    cursor: pointer;
    border-radius: 3px;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    color: var(--text-color);
}

.close-btn:hover {
    background: var(--primary-color);
    color: var(--card-bg);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

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

.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    font-size: 1.2rem;
    cursor: pointer;
    border-radius: 3px;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    color: var(--text-color);
}

.prev-btn {
    left: 15px;
}

.next-btn {
    right: 15px;
}

.nav-btn:hover {
    background: var(--primary-color);
    color: var(--card-bg);
    border-color: var(--primary-color);
    transform: translateY(-50%) translateY(-2px);
}

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

/* 半透明预览图 */
.prev-preview, .next-preview {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 80px;
    height: 120px;
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 4px;
    overflow: hidden;
    z-index: 5;
    pointer-events: none;
}

.prev-preview {
    left: 70px;
    opacity: 0.3;
}

.next-preview {
    right: 70px;
    opacity: 0.3;
}

.prev-preview img, .next-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.main-photo-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px;
    overflow: hidden;
    background: var(--background-color);
    position: relative;
}

.main-photo {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.5s ease;
    transform-origin: center;
    filter: blur(0);
}

.main-photo.loading {
    filter: blur(4px);
    transition: filter 0.5s ease;
}

/* 照片详情水印 */
.main-photo-date {
    position: absolute;
    top: 40px;
    right: 40px;
    color: rgba(90, 90, 90, 0.4);
    font-size: 0.8rem;
    font-style: italic;
    transform: rotate(10deg);
    pointer-events: none;
}

.photo-info {
    padding: 25px 30px;
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
}

#photo-note {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    font-size: 0.95rem;
    font-family: inherit;
    margin-bottom: 20px;
    outline: none;
    transition: var(--transition);
    resize: none;
    background: var(--background-color);
    color: var(--text-color);
}

#photo-note:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(214, 194, 186, 0.2);
}

.tag-options {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    align-items: center;
}

.tag-options label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 400;
    transition: color 0.3s ease;
    color: var(--text-color);
    padding: 4px 0;
    position: relative;
}

.tag-options label::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.tag-options label:hover {
    color: var(--primary-color);
}

.tag-options label:hover::after {
    width: 100%;
}

.tag-options input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.save-note-btn {
    background: var(--card-bg);
    color: var(--text-color);
    padding: 12px;
    border-radius: 3px;
    text-align: center;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.save-note-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

/* 爱心按钮 */
.love-btn {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 60px;
    height: 60px;
    border-radius: 3px;
    background: var(--card-bg);
    color: var(--accent-color);
    border: 1px solid var(--border-color);
    font-size: 1.8rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    z-index: 100;
    position: relative;
}

.love-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    color: var(--primary-color);
}

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

/* 爱心特效 */
.heart-effect {
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    animation: heartFly 1.2s ease-out forwards;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
    color: var(--accent-color);
}

@keyframes heartFly {
    0% {
        transform: scale(0);
        opacity: 0.8;
    }
    50% {
        transform: scale(1.1) translateY(-30px) rotate(15deg);
        opacity: 0.9;
    }
    100% {
        transform: scale(0.9) translateY(-100px) rotate(30deg);
        opacity: 0;
    }
}

/* 高级点击特效 */
.click-effect {
    position: fixed;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(214, 194, 186, 0.5) 0%, rgba(214, 194, 186, 0) 70%);
    pointer-events: none;
    z-index: 9998;
    transform: translate(-50%, -50%) scale(0);
    animation: clickRipple 0.6s ease-out forwards;
}

@keyframes clickRipple {
    0% {
        transform: translate(-50%, -50%) scale(0);
    }
    50% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.5;
    }
    100% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0;
    }
}

/* 页面载入动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.container > * {
    animation: fadeIn 0.6s ease-out;
    animation-fill-mode: both;
}

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

/* 照片悬停效果增强 */
@keyframes subtleHover {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-2px);
    }
}

.photo-card:hover {
    animation: subtleHover 3s ease-in-out infinite;
}

/* 导航栏样式 */
.nav-menu {
    position: fixed;
    top: 30px;
    right: 30px;
    z-index: 999;
}

.nav-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    width: 45px;
    height: 45px;
    border-radius: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    position: relative;
    z-index: 100;
}

.nav-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 1px;
    background: var(--text-color);
    position: relative;
    transition: var(--transition);
}

.nav-toggle span::before,
.nav-toggle span::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 1px;
    background: var(--text-color);
    transition: var(--transition);
}

.nav-toggle span::before {
    top: -5px;
}

.nav-toggle span::after {
    top: 5px;
}

.nav-items {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    gap: 30px;
    padding: 0;
    margin: 0;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 90;
}

.nav-items.active {
    opacity: 1;
    visibility: visible;
}

.nav-items li a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    padding: 5px 0;
    position: relative;
    transition: color 0.3s ease;
    letter-spacing: 0.5px;
}

.nav-items li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-items li a:hover {
    color: var(--primary-color);
}

.nav-items li a:hover::after {
    width: 100%;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 50px;
    height: 50px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 98;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .container {
        max-width: 900px;
        padding: 30px 30px 60px;
    }
    
    .photo-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 25px 25px 60px;
    }
    
    .title {
        font-size: 2rem;
    }
    
    .heart-icon {
        margin: 0 10px;
        font-size: 1.5rem;
    }
    
    .upload-section {
        flex-direction: column;
        gap: 20px;
        padding: 20px 25px;
        width: 100%;
    }
    
    .photo-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 25px;
        margin-bottom: 60px;
    }
    
    .photo-card img {
        height: 200px;
    }
    
    .nav-menu {
        top: 20px;
        right: 20px;
    }
    
    .nav-toggle {
        width: 40px;
        height: 40px;
    }
    
    .nav-items {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav-items li a {
        font-size: 0.9rem;
    }
    
    .viewer-content {
        width: 95%;
        max-width: 800px;
        border-radius: 10px;
    }
    
    .main-photo-container {
        padding: 20px;
    }
    
    .main-photo {
        max-height: 60vh;
    }
    
    .nav-btn {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }
    
    .prev-btn {
        left: 10px;
    }
    
    .next-btn {
        right: 10px;
    }
    
    .prev-preview,
    .next-preview {
        width: 60px;
        height: 90px;
    }
    
    .prev-preview {
        left: 60px;
    }
    
    .next-preview {
        right: 60px;
    }
    
    .love-btn,
    .back-to-top {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        bottom: 25px;
        right: 25px;
    }
    
    .back-to-top {
        right: 85px;
    }
    
    .photo-info {
        padding: 20px 25px;
    }
    
    .tag-options {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 20px 20px 50px;
    }
    
    .title {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .header {
        margin-bottom: 40px;
        padding: 30px 15px;
    }
    
    .upload-section {
        margin-bottom: 40px;
    }
    
    .upload-btn {
        padding: 10px 20px;
        font-size: 0.9rem;
        width: 100%;
        justify-content: center;
    }
    
    .tag-filter select {
        width: 100%;
    }
    
    .photo-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 20px;
        margin-bottom: 50px;
    }
    
    .photo-card img {
        height: 180px;
    }
    
    .photo-overlay {
        padding: 12px 15px;
    }
    
    .photo-note {
        font-size: 0.85rem;
    }
    
    .viewer-content {
        width: 98%;
        border-radius: 8px;
    }
    
    .main-photo-container {
        padding: 15px;
    }
    
    .main-photo {
        max-height: 50vh;
    }
    
    .photo-info {
        padding: 15px 20px;
    }
    
    #photo-note {
        font-size: 0.9rem;
        padding: 10px 12px;
    }
    
    .tag-options label {
        font-size: 0.85rem;
    }
    
    .close-btn {
        width: 35px;
        height: 35px;
        font-size: 1.3rem;
    }
    
    .love-btn,
    .back-to-top {
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
        bottom: 20px;
    }
    
    .back-to-top {
        right: 75px;
    }
}

/* 天气气泡样式 */
.weather-bubble {
    position: fixed;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 20px;
    font-size: 14px;
    color: var(--text-color);
    font-weight: 500;
    opacity: 0.6;
    transform: translate(-50%, -100%);
    margin-top: -15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    z-index: 10000;
    transition: opacity 0.3s ease, transform 0.3s ease;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.8);
}

/* 暗色模式切换按钮 */
.dark-mode-toggle {
    position: fixed;
    top: 20px;
    left: 20px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1005;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.dark-mode-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    background: var(--primary-color);
    color: white;
}

/* 优化导航切换按钮 */
.nav-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1005;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.nav-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    background: var(--primary-color);
    color: white;
}

/* 导航栏悬浮图标模式 */
.nav-toggle.floating-icon {
    width: 50px;
    height: 50px;
    background: url('mmexport1717928610572.jpg') center/cover no-repeat;
    border: 2px solid white;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

/* 隐藏式导航菜单 */
.hidden-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1004;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

.hidden-nav.active {
    opacity: 1;
    visibility: visible;
}

.hidden-nav ul {
    list-style: none;
    padding: 0;
    text-align: center;
}

.hidden-nav li {
    margin: 25px 0;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.hidden-nav.active li {
    opacity: 1;
    transform: translateY(0);
}

/* 导航项动画延迟 */
.hidden-nav li:nth-child(1) { transition-delay: 0.1s; }
.hidden-nav li:nth-child(2) { transition-delay: 0.15s; }
.hidden-nav li:nth-child(3) { transition-delay: 0.2s; }
.hidden-nav li:nth-child(4) { transition-delay: 0.25s; }
.hidden-nav li:nth-child(5) { transition-delay: 0.3s; }

.hidden-nav a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 22px;
    font-weight: 500;
    position: relative;
    padding: 8px 15px;
    transition: color 0.3s ease;
    display: inline-block;
}

.hidden-nav a:hover {
    color: var(--primary-color);
}

.hidden-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 1px;
    background: var(--primary-color);
    transition: all 0.3s ease;
}

.hidden-nav a:hover::after {
    width: 100%;
    left: 0;
}

/* 暗色模式样式 */
body.dark-mode {
    background-color: #222831;
    color: #e0e0e0;
}

body.dark-mode .container {
    background-color: rgba(34, 40, 49, 0.7);
}

body.dark-mode header,
body.dark-mode .upload-section {
    background-color: rgba(40, 47, 58, 0.8);
}

body.dark-mode h1,
body.dark-mode .subtitle {
    color: #e0e0e0;
}

body.dark-mode .upload-btn,
body.dark-mode .tag-filter select {
    background-color: #393e46;
    color: #e0e0e0;
    border-color: #555;
}

body.dark-mode .photo-card {
    background-color: #393e46;
    border-color: #555;
}

body.dark-mode .photo-viewer {
    background-color: rgba(34, 40, 49, 0.95);
}

body.dark-mode .viewer-content {
    background-color: #393e46;
}

body.dark-mode .photo-info input,
body.dark-mode .photo-info select {
    background-color: #4a4f57;
    color: #e0e0e0;
    border-color: #555;
}

body.dark-mode .save-note-btn {
    background-color: var(--primary-color);
    color: #fff;
}

/* 优化照片容器和日期水印 */
.photo-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.date-watermark {
    position: absolute;
    bottom: 10px;
    right: 10px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.4);
    transform: rotate(10deg);
    padding: 4px 8px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    pointer-events: none;
    transition: all 0.3s ease;
    opacity: 0;
}

.photo-card:hover .date-watermark {
    opacity: 1;
    color: rgba(255, 255, 255, 0.8);
    background: rgba(0, 0, 0, 0.3);
}

.photo-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: all 0.5s ease;
}

.photo-image.loaded {
    opacity: 1;
    filter: blur(0);
}

/* 照片查看器日期水印 */
.photo-date-watermark {
    position: absolute;
    bottom: 20px;
    right: 20px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.4);
    transform: rotate(10deg);
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.15);
    border-radius: 6px;
    font-weight: 500;
    pointer-events: none;
    transition: all 0.3s ease;
}

body.dark-mode .photo-date-watermark {
    color: rgba(224, 224, 224, 0.4);
    background: rgba(255, 255, 255, 0.1);
}

/* 页面背景渐变效果（查看器激活时） */
body.viewer-active {
    background-color: #f8f6f4;
}

body.dark-mode.viewer-active {
    background-color: #1a1d22;
}

/* 增强滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    opacity: 0.3;
    border-radius: 4px;
    transition: opacity 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    opacity: 0.6;
}

/* 更新返回顶部按钮样式 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1003;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(214, 194, 186, 0.4);
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(214, 194, 186, 0.5);
    background: var(--accent-color);
}

/* 移动端优化 */
@media (max-width: 768px) {
    .nav-toggle {
        top: 15px;
        right: 15px;
        width: 36px;
        height: 36px;
    }
    
    .dark-mode-toggle {
        top: 15px;
        left: 15px;
        width: 32px;
        height: 32px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
    
    .hidden-nav a {
        font-size: 18px;
    }
    
    .date-watermark {
        font-size: 10px;
    }
    
    .photo-date-watermark {
        font-size: 12px;
        bottom: 15px;
        right: 15px;
    }
}