/*
 * style.css - 老友摄影网站样式
 * 设计原则：大字体、简洁、亮色、老人友好
 */

/* === 全局变量 === */
:root {
    --color-bg: #faf9f7;
    --color-surface: #ffffff;
    --color-text: #2c2c2c;
    --color-text-secondary: #6b6b6b;
    --color-text-tertiary: #9e9e9e;
    --color-border: #e8e6e3;
    --color-primary: #5b8c5a;
    --color-primary-hover: #4a7a49;
    --color-primary-light: #e8f0e7;
    --color-accent: #c97b4a;
    --color-shadow: rgba(0, 0, 0, 0.08);
    --radius: 8px;
    --radius-lg: 16px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 22px;
    --font-size-xxl: 28px;
    --max-width: 1200px;
}

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

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

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

img {
    max-width: 100%;
    display: block;
}

/* === 导航栏 === */
.navbar {
    background: linear-gradient(135deg, rgba(240, 248, 240, 0.72) 0%, rgba(255, 255, 255, 0.68) 50%, rgba(250, 245, 235, 0.72) 100%);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(232, 230, 227, 0.55);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 2px;
}

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

.nav-link {
    padding: 10px 24px;
    border-radius: var(--radius);
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 2px solid rgba(91, 140, 90, 0.5);
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.7);
    transition: all 0.2s;
    font-weight: 500;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.75);
    border-color: rgba(91, 140, 90, 0.7);
    color: var(--color-primary);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.85);
    border-color: var(--color-primary);
    color: var(--color-primary);
    font-weight: 600;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

/* 数字人生 - 特殊按钮样式 */
.nav-link-special {
    border-color: rgba(201, 123, 74, 0.55);
    color: var(--color-accent);
}

.nav-link-special:hover {
    background: rgba(255, 255, 255, 0.75);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.nav-link-special.active {
    background: rgba(255, 255, 255, 0.85);
    border-color: var(--color-accent);
    color: var(--color-accent);
    font-weight: 600;
}

/* JTBM 协作 - AI 主题特殊按钮 */
.nav-link-jtbm {
    border-color: rgba(25, 118, 210, 0.55);
    color: #1976d2;
    background: rgba(25, 118, 210, 0.08);
}

.nav-link-jtbm:hover {
    background: rgba(25, 118, 210, 0.15);
    border-color: #1976d2;
    color: #1976d2;
}

.nav-link-jtbm.active {
    background: rgba(25, 118, 210, 0.2);
    border-color: #1976d2;
    color: #1976d2;
    font-weight: 600;
}

/* === 主内容区 === */
.main-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 32px 24px;
    min-height: calc(100vh - 200px);
}

/* === 页面标题 === */
.page-header {
    text-align: center;
    margin-bottom: 40px;
}

.page-header h1 {
    font-size: var(--font-size-xxl);
    color: var(--color-text);
    margin-bottom: 8px;
    font-weight: 500;
}

.page-header p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

/* === 照片墙（CSS Grid） === */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.photo-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 2px 8px var(--color-shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    display: block;
    color: var(--color-text);
}

.photo-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--color-shadow);
}

.photo-img-wrapper {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: linear-gradient(135deg, #e0e0e0, #f0f0f0);
}

.photo-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.photo-card:hover .photo-img-wrapper img {
    transform: scale(1.05);
}

/* 图片加载失败的占位符 */
.photo-img-wrapper.img-fallback {
    background: linear-gradient(135deg, #b0bec5, #cfd8dc);
}

.photo-img-wrapper.img-fallback::after {
    content: attr(data-category);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
    color: white;
    font-weight: 500;
}

.photo-img-wrapper.img-fallback img {
    display: none;
}

/* 分类角标 */
.photo-category-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 12px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    border-radius: 20px;
    font-size: 13px;
    backdrop-filter: blur(4px);
}

/* 照片信息 */
.photo-info {
    padding: 16px 20px;
}

.photo-info h3 {
    font-size: var(--font-size-lg);
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--color-text);
}

.photo-date {
    font-size: 14px;
    color: var(--color-text-tertiary);
    margin-bottom: 8px;
}

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

.tag {
    font-size: 13px;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    padding: 2px 10px;
    border-radius: 12px;
}

/* === 照片详情页 === */
.photo-detail {
    max-width: 900px;
    margin: 0 auto;
}

.back-link {
    display: inline-block;
    margin-bottom: 24px;
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

.photo-large {
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 32px;
    background: var(--color-border);
    aspect-ratio: 4/3;
}

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

.photo-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #b0bec5, #cfd8dc);
    font-size: 32px;
    color: white;
}

.photo-meta {
    padding: 0 8px;
}

.photo-meta h1 {
    font-size: var(--font-size-xxl);
    font-weight: 500;
    margin-bottom: 16px;
}

.photo-tags-large {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 32px;
}

.tag-large {
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 500;
    padding: 4px 14px;
    font-size: 14px;
}

/* AI 描述 */
.ai-description {
    background: var(--color-surface);
    padding: 24px 28px;
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
    border-left: 4px solid var(--color-primary);
}

.ai-description h2,
.user-memory h2,
.exif-info h2 {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.ai-description p {
    font-size: var(--font-size-lg);
    line-height: 1.9;
    color: var(--color-text);
}

/* 老友回忆 */
.user-memory {
    background: #fff8f0;
    padding: 24px 28px;
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
    border-left: 4px solid var(--color-accent);
}

.user-memory p {
    font-size: var(--font-size-lg);
    line-height: 1.9;
    color: var(--color-text);
}

/* 拍摄信息 */
.exif-info {
    background: var(--color-surface);
    padding: 24px 28px;
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
}

.exif-table {
    width: 100%;
    border-collapse: collapse;
}

.exif-table td {
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--font-size-base);
}

.exif-table td:first-child {
    color: var(--color-text-tertiary);
    width: 120px;
}

.exif-table td:last-child {
    color: var(--color-text);
}

/* 下载按钮 */
.photo-actions {
    margin: 32px 0;
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: var(--radius);
    font-size: var(--font-size-lg);
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

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

.btn-primary:hover {
    background: var(--color-primary-hover);
    color: white;
}

.btn-share {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-share:hover {
    background: var(--color-primary);
    color: #fff;
}

/* 分享提示 Toast */
.share-toast {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    background: #333;
    color: #fff;
    padding: 12px 28px;
    border-radius: 24px;
    font-size: var(--font-size-base);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.share-toast.show {
    opacity: 1;
}

.btn-filter {
    background: var(--color-primary);
    color: white;
    padding: 10px 24px;
}

.btn-reset {
    background: transparent;
    color: var(--color-text-secondary);
    padding: 10px 24px;
    border: 1px solid var(--color-border);
}

/* 上一张/下一张 */
.photo-nav {
    display: flex;
    justify-content: space-between;
    padding: 24px 0;
    border-top: 1px solid var(--color-border);
    margin-top: 32px;
}

.nav-prev, .nav-next {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
}

.nav-disabled {
    color: var(--color-text-tertiary);
    font-size: var(--font-size-lg);
}

/* === 筛选页 === */
.filter-bar {
    background: var(--color-surface);
    padding: 20px 24px;
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
    box-shadow: 0 2px 8px var(--color-shadow);
}

.filter-form {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.filter-select {
    padding: 10px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: var(--font-size-base);
    background: var(--color-surface);
    color: var(--color-text);
    font-family: inherit;
    cursor: pointer;
}

.filter-select:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: -1px;
}

.result-count {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    font-size: 15px;
}

/* === 关于页 === */
.about-page {
    max-width: 800px;
    margin: 0 auto;
}

.about-header {
    text-align: center;
    margin-bottom: 48px;
}

.about-header h1 {
    font-size: 32px;
    font-weight: 500;
    margin-bottom: 8px;
}

.about-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

/* === 数字人生页 === */
.digital-life-page {
    max-width: 800px;
    margin: 0 auto;
}

.feature-grid {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
    padding: 0;
}

.feature-grid li {
    background: var(--color-bg);
    padding: 20px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.feature-grid li strong {
    display: block;
    font-size: var(--font-size-base);
    color: var(--color-text);
    margin-bottom: 6px;
}

.feature-grid li p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin: 0;
}

.coming-soon {
    text-align: center;
    background: linear-gradient(135deg, #fff8f0, #fff3e0) !important;
    border: 2px dashed var(--color-accent) !important;
}

.coming-soon h2 {
    color: var(--color-accent);
}

.about-section {
    background: var(--color-surface);
    padding: 32px;
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
    box-shadow: 0 2px 8px var(--color-shadow);
}

.about-section h2 {
    font-size: var(--font-size-xl);
    font-weight: 500;
    margin-bottom: 16px;
    color: var(--color-text);
}

.about-section p {
    font-size: var(--font-size-lg);
    line-height: 1.9;
    color: var(--color-text);
    margin-bottom: 12px;
}

.license-list {
    list-style: none;
    padding: 16px 0;
}

.license-list li {
    padding: 6px 0;
    padding-left: 24px;
    position: relative;
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

.license-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary);
}

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

.empty-state p {
    font-size: var(--font-size-xl);
    margin-bottom: 8px;
}

.empty-state .hint {
    font-size: var(--font-size-base);
    color: var(--color-text-tertiary);
}

/* === 底部 === */
.footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 32px 24px;
    text-align: center;
    margin-top: 60px;
}

.footer-content p {
    font-size: 14px;
    color: var(--color-text-tertiary);
    margin-bottom: 4px;
}

.footer-content a {
    color: var(--color-text-secondary);
    text-decoration: underline;
}

/* === 访客记录页 === */

/* 总访问量数字 */
.stats-hero {
    text-align: center;
    padding: 48px 32px !important;
    background: linear-gradient(135deg, #e8f0e7, #d4e8d3) !important;
}

.stat-big-number {
    font-size: 64px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

/* 柱状图 */
.chart-container {
    overflow-x: auto;
}

.bar-chart {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    min-height: 200px;
    padding: 8px 0;
}

.bar-item {
    flex: 1;
    min-width: 36px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.bar-label {
    font-size: 12px;
    color: var(--color-text-tertiary);
}

.bar-track {
    width: 100%;
    max-width: 40px;
    height: 150px;
    background: var(--color-bg);
    border-radius: 4px 4px 0 0;
    position: relative;
    display: flex;
    align-items: flex-end;
}

.bar-fill {
    width: 100%;
    background: linear-gradient(180deg, var(--color-primary), rgba(91, 140, 90, 0.5));
    border-radius: 4px 4px 0 0;
    min-height: 4px;
    transition: height 0.4s ease;
}

.bar-value {
    font-size: 13px;
    color: var(--color-text);
    font-weight: 600;
}

/* 访客记录表格 */
.visitor-log-table-wrapper {
    overflow-x: auto;
}

.visitor-log-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-base);
}

.visitor-log-table th {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 2px solid var(--color-border);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.visitor-log-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}

.log-time {
    white-space: nowrap;
    color: var(--color-text-tertiary) !important;
    font-size: 14px;
}

.log-page {
    font-family: monospace;
    font-size: 14px;
}

.empty-hint {
    font-size: var(--font-size-base);
    color: var(--color-text-tertiary);
    text-align: center;
    padding: 24px;
}

/* --- 下载记录页 --- */

.top-downloads-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.top-download-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 10px 16px;
    background: rgba(46, 125, 50, 0.05);
    border-radius: var(--border-radius);
    border: 1px solid rgba(46, 125, 50, 0.1);
    transition: background 0.2s;
}

.top-download-item:hover {
    background: rgba(46, 125, 50, 0.1);
}

.top-download-rank {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
    min-width: 36px;
    text-align: center;
}

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

.top-download-title {
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    text-decoration: none;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.top-download-title:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.top-download-meta {
    font-size: 13px;
    color: var(--color-text-tertiary);
    margin-top: 2px;
}

.top-download-meta strong {
    color: var(--color-primary);
}

/* === 响应式（手机适配） === */
@media (max-width: 640px) {
    .nav-container {
        padding: 12px 16px;
    }

    .nav-logo {
        font-size: var(--font-size-lg);
    }

    .nav-link {
        padding: 6px 12px;
        font-size: var(--font-size-base);
    }

    .main-content {
        padding: 20px 16px;
    }

    .photo-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 12px;
    }

    .photo-info {
        padding: 10px 12px;
    }

    .photo-info h3 {
        font-size: 15px;
    }

    .filter-form {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-select {
        width: 100%;
    }

    .about-section {
        padding: 20px;
    }
}