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

/* 搜索功能样式 */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.search-overlay.active {
    display: flex;
    opacity: 1;
}

/* 常驻搜索模式：背景保持模糊，阻止页面交互 */
body.persistent-search-mode .search-overlay {
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    pointer-events: auto; /* 确保遮罩层接收点击事件以阻止页面交互 */
}

body.persistent-search-mode .search-modal {
    pointer-events: auto;
    transform: translateY(0);
}

.search-modal {
    position: relative;
    width: 90%;
    max-width: 600px;
    transform: translateY(-20px);
    transition: transform 0.3s ease;
}

.search-lock-btn {
    position: absolute;
    top: -45px;
    right: 0;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: #fff;
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.search-lock-btn:hover {
    background: rgba(255, 255, 255, 0.4);
    transform: scale(1.1);
}

.search-lock-btn.locked {
    background: #1a73e8;
    border-color: #1a73e8;
    color: #fff;
}

.search-overlay.active .search-modal {
    transform: translateY(0);
}

.search-box {
    display: flex;
    align-items: center;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    overflow: visible;
    padding: 8px;
}

.search-engine-selector {
    position: relative;
    cursor: pointer;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    transition: background 0.3s ease;
    border-radius: 6px;
}

.search-engine-selector:hover {
    background: #f5f5f5;
}

.search-engine-selector img {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

#global-search-input {
    flex: 1;
    padding: 12px 15px;
    border: none;
    outline: none;
    font-size: 16px;
    background: transparent;
}

#global-search-btn {
    padding: 12px 24px;
    border: none;
    background: #333;
    color: #fff;
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.3s ease;
    font-size: 15px;
}

#global-search-btn:hover {
    background: #000;
}

.search-engine-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 8px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 180px;
    display: none;
    overflow: hidden;
    z-index: 10000;
}

.search-engine-dropdown.show {
    display: block;
}

.engine-option {
    padding: 12px 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background 0.2s ease;
}

.engine-option:hover {
    background: #f5f5f5;
}

.engine-option.active {
    background: #e8f0fe;
    color: #1a73e8;
}

.engine-option img {
    width: 20px;
    height: 20px;
    object-fit: contain;
}

body {
    font-family: 'Georgia', 'Times New Roman', 'STSong', serif;
    line-height: 1.8;
    color: #333;
    padding: 20px;
    background-position: 0 0, 10px 10px;
    /* 信件背景（图片） */
    background: #eeeeee url(../img/bj.png);
    background-attachment: fixed;
    background-repeat: repeat;
    /* 信件背景（马赛克方格） */
    /*background-color: #f0f0f0;*/
    /*background-image:*/
    /*    linear-gradient(45deg, #e0e0e0 25%, transparent 25%, transparent 75%, #e0e0e0 75%),*/
    /*    linear-gradient(45deg, #e0e0e0 25%, transparent 25%, transparent 75%, #e0e0e0 75%);*/
    /*background-size: 20px 20px;*/
}

.letter-container {
    /* max-width: 65%; */
    max-width: 850px;
    margin: 0 auto;
    background: white;
    padding: 40px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    border-radius: 2px;
    margin-bottom: 20px;
    position: relative;
}

/* 语言切换按钮样式 */
.lang-switch-container {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 100;
}

.lang-switch-container img {
    width: 24px;
    height: 24px;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.lang-switch-container img:hover {
    opacity: 1.0;
}

/* 头部导航 */
.nav-tabs {
    display: flex;
    border-bottom: 1px solid #eee;
    margin-bottom: 30px;
}

.nav-tab {
    padding: 15px 20px;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
    font-size: 16px;
}

.nav-tab:hover {
    background-color: #f5f5f5;
}

.nav-tab.active {
    border-bottom-color: #333;
    color: #333;
    font-weight: bold;
}

/* 内容区域 */
.tab-content {
    display: none;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-content.active {
    display: block;
    animation: tabFadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes tabFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 信纸纹理效果 */
.letter-container {
    background-image:
        linear-gradient(transparent 29px, #f0f0f0 30px);
    background-size: 100% 30px;
}

/* 通用内容样式 */
.content-section {
    font-size: 16px;
    line-height: 1.8;
}

.content-section h2 {
    margin-bottom: 20px;
    color: #222;
    font-size: 24px;
}

.content-section h3 {
    margin: 25px 0 15px 0;
    color: #444;
    font-size: 18px;
}

.content-section p {
    margin-bottom: 15px;
    text-align: justify;
}

/* 列表样式 */
.content-section ul {
    list-style: none;
    padding-left: 0;
    margin: 15px 0;
}

.content-section li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 20px;
}

.content-section li::before {
    content: "▹";
    color: #999;
    position: absolute;
    left: 0;
    top: 0;
}

/* 联系方式 */
.contact-info {
    margin: 15px 0;
}

.contact-item {
    margin-bottom: 10px;
}

.contact-label {
    font-weight: bold;
    color: #555;
}

/* 网站链接 */
.website-links a {
    display: inline-block;
    margin-right: 20px;
    color: #666;
    text-decoration: none;
    margin-bottom: 10px;
}

.website-links a:hover {
    color: #333;
    text-decoration: underline;
}

/* 视图切换文字样式 */
.website-view-toggle {
    font-size: 13px;
    color: #999;
    cursor: pointer;
    transition: color 0.3s ease;
    user-select: none;
}

.website-view-toggle:hover {
    color: #333;
    text-decoration: underline;
}

/* 卡片视图样式 */
.website-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.website-card {
    background: #fff;
    border: 1px solid #eee;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    transition: border-color 0.3s ease;
}

.website-card:hover {
    border-color: #333;
}

.website-card-icon {
    width: 100%;
    height: 120px;
    overflow: hidden;
    background: #f9f9f9;
    display: flex;
    align-items: center;
    justify-content: center;
}

.website-card-placeholder {
    background: linear-gradient(135deg, #e0e0e0 0%, #f5f5f5 100%);
    color: #999;
    font-size: 30px;
    font-weight: bold;
    font-family: serif;
}

.website-card-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.website-card-info {
    padding: 12px;
}

.website-card-title {
    font-weight: bold;
    color: #333;
    font-size: 14px;
    margin-bottom: 6px;
    line-height: 1.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.website-card-desc {
    font-size: 12px;
    color: #888;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* MookNote 弹窗样式 */
.mooknote-modal-content {
    max-width: 800px;
    width: 90%;
}

.mooknote-banner-carousel {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 8px 8px 0 0;
}

.carousel-container {
    position: relative;
    width: 100%;
    height: 400px;
    background: #f5f5f5;
}

.carousel-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0;
    transition: opacity 0.5s ease;
    cursor: pointer;
    pointer-events: none;
}

.carousel-image.active {
    opacity: 1;
    pointer-events: auto;
}

.carousel-image:hover {
    filter: brightness(1.1);
}

.carousel-btn {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 60px;
    background: rgba(255, 255, 255, 0.3);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 28px;
    transition: background 0.3s ease;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-btn:hover {
    background: rgba(0, 0, 0, 0.1);
}

.carousel-prev {
    left: 0;
}

.carousel-next {
    right: 0;
}

.carousel-indicators {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.carousel-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: background 0.3s ease;
}

.carousel-indicator.active {
    background: #fff;
}

/* MookNote 全屏预览样式 */
.photo-lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.95);
    z-index: 10000;
    align-items: center;
    justify-content: center;
}

.photo-lightbox.active {
    display: flex;
}

.lightbox-img {
    max-width: 95%;
    max-height: 95%;
    object-fit: contain;
    border-radius: 4px;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    border: none;
    font-size: 36px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.3s ease;
    z-index: 10001;
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.4);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    border: none;
    font-size: 32px;
    width: 60px;
    height: 80px;
    cursor: pointer;
    transition: background 0.3s ease;
    z-index: 10001;
}

.lightbox-nav:hover {
    background: rgba(255, 255, 255, 0.4);
}

.lightbox-prev {
    left: 30px;
}

.lightbox-next {
    right: 30px;
}

.lightbox-counter {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    font-size: 16px;
    background: rgba(0, 0, 0, 0.5);
    padding: 8px 20px;
    border-radius: 20px;
}

.mooknote-body {
    padding: 40px 50px;
}

.mooknote-content {
    padding: 40px 35px;
}

.mooknote-content p {
    margin-bottom: 15px;
    line-height: 1.8;
    color: #444;
    text-align: justify;
}

.mooknote-intro {
    font-size: 16px;
    color: #333;
    font-weight: 500;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.mooknote-thanks {
    font-style: italic;
    color: #666;
    background: #f9f9f9;
    padding: 15px;
    border-left: 4px solid #ddd;
    border-radius: 4px;
}

.mooknote-download {
    text-align: center;
    margin-top: 30px;
    margin-bottom: 60px;
    padding-top: 20px;
    border-top: 1px dashed #eee;
}

.download-btn {
    display: inline-block;
    padding: 12px 30px;
    background: #333;
    color: #fff;
    text-decoration: none;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background: #000;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* 工具和游戏网格 */
.tools-grid,
.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
    margin: 15px 0;
}

.tool-item,
.game-item {
    padding: 15px;
    border: 1px solid #eee;
    border-radius: 4px;
    background-color: #fafafa;
    cursor: pointer;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), 
                box-shadow 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.tool-item:hover,
.game-item:hover {
    border-color: #000;
}

.tool-name,
.game-name {
    font-weight: bold;
    color: #333;
    margin-bottom: 5px;
}

.tool-desc,
.game-desc {
    font-size: 14px;
    color: #666;
}

/* 关于我页面特殊样式 */
.about-me-content {
    text-align: justify;
}

.about-me-content p:first-child {
    font-size: 18px;
    font-style: italic;
    color: #666;
    margin-bottom: 25px;
}

@media (max-width: 768px) {
    .letter-container {
        padding: 20px;
        margin: 10px;
    }

    .nav-tabs {
        flex-wrap: wrap;
    }

    .nav-tab {
        padding: 10px 15px;
        font-size: 14px;
    }

    .tools-grid,
    .games-grid {
        grid-template-columns: 1fr;
    }

    /* 移动端调整语言按钮位置 */
    .lang-switch-container {
        top: 5px;
        right: 5px;
    }
}

/* 信纸底部页脚描述 */
.letter-footer {
    text-align: center;
    margin-top: 60px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    color: #999;
    font-size: 14px;
}

/* 底部版权信息 - 在信纸外部 */
#footer-wrap {
    max-width: 850px;
    /* max-width: 65%; */
    margin: 0 auto 20px auto;
    text-align: center;
    padding: 20px;
    color: #999;
    font-size: 12px;
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    border-radius: 2px;
    background-image:
        linear-gradient(transparent 29px, #f0f0f0 30px);
    background-size: 100% 30px;
    border-top: 1px solid #eee;
}

#footer-wrap a {
    color: #666;
    text-decoration: none;
}

#footer-wrap a:hover {
    color: #333;
    text-decoration: underline;
}

#footer-wrap img {
    width: 50px;
    vertical-align: middle;
    margin-left: 5px;
}

/* 今日诗词样式 */
#jinrishici-sentence {
    position: absolute;
    top: 111px;
    right: 40px;
    font-size: 14px;
    font-style: italic;
    color: #666;
    text-align: right;
    max-width: 300px;
}

/* 网站统计样式 */
.webinfo {
    display: flex;
    justify-content: center;
    gap: 30px;
    font-size: 12px;
    color: #999;
    margin-top: 10px;
}

.webinfo-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

@media (max-width: 768px) {
    #jinrishici-sentence {
        position: static;
        text-align: center;
        max-width: 100%;
        margin-bottom: 20px;
        padding: 10px;
        font-size: 13px;
    }

    .webinfo {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 15px;
    }
}