/* ========================================
   股票指标网 - 墨竹主题 v4.0 (iPad优化版)
   修复：iPad 头部间距过窄，增加左右留白
   ======================================== */

:root {
    --gray-900: #1a1a1a;
    --gray-800: #2c2c2c;
    --gray-700: #4a4a4a;
    --gray-600: #6b6b6b;
    --gray-500: #8a8a8a;
    --gray-300: #e0e0e0;
    --gray-100: #f5f5f5;
    --white: #ffffff;
    --black: #000000;
    --accent: #2c7da0;
    --accent-light: #4a9fbf;
    --accent-dark: #1f5e7a;
    --max-width: 1280px;
    --content-width: 800px;
    --transition: all 0.2s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", "Microsoft YaHei", sans-serif;
    background: var(--gray-100);
    color: var(--gray-900);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
}

/* 容器系统 - 基础留白（笔记本及以上） */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.container-narrow {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* 链接样式 */
a {
    color: var(--gray-800);
    text-decoration: none;
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

a:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.article-body a {
    color: var(--accent);
    border-bottom: 1px solid var(--accent-light);
}

.article-body a:hover {
    color: var(--accent-dark);
    border-bottom-color: var(--accent-dark);
}

/* ========== 头部 ========== */
.site-header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-300);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
    background: rgba(255,255,255,0.95);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    padding: 16px 0;
}

.logo-area {
    display: flex;
    align-items: baseline;
    gap: 12px;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--gray-900);
    border-bottom: none;
}

.logo:hover {
    color: var(--gray-900);
    border-bottom: none;
}

.site-slogan {
    font-size: 0.8rem;
    color: var(--gray-600);
    border-left: 1px solid var(--gray-300);
    padding-left: 12px;
}

.main-nav ul {
    display: flex;
    gap: 24px;
    list-style: none;
}

.main-nav a {
    font-size: 0.9rem;
    font-weight: 500;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
}

.main-nav a:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ========== 面包屑 ========== */
.breadcrumb {
    background: var(--white);
    border-bottom: 1px solid var(--gray-300);
    padding: 12px 0;
    font-size: 0.8rem;
    color: var(--gray-600);
}

.breadcrumb a {
    color: var(--gray-600);
}

.breadcrumb a:hover {
    color: var(--accent);
}

.breadcrumb .separator {
    margin: 0 8px;
    color: var(--gray-500);
}

/* ========== 主布局 ========== */
.layout-grid {
    display: flex;
    gap: 48px;
    margin: 40px auto;
    align-items: flex-start;
}

.content-main {
    flex: 1;
    min-width: 0;
}

.sidebar {
    width: 280px;
    flex-shrink: 0;
}

.content-card {
    background: var(--white);
    border: 1px solid var(--gray-300);
    padding: 40px 48px;
    width: 100%;
}

/* 页面标题 */
.page-header {
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gray-300);
}

.page-header h1 {
    font-size: 1.8rem;
    font-weight: 600;
    letter-spacing: -0.3px;
    color: var(--gray-800);
}

/* ========== 文章列表 ========== */
.post-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.post-card {
    display: flex;
    gap: 32px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--gray-300);
}

.post-card:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.post-thumb {
    flex-shrink: 0;
    width: 240px;
}

.post-thumb img,
.post-thumb .thumb {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
}

.post-content {
    flex: 1;
}

.post-title {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 8px;
}

.post-title a {
    color: var(--gray-800);
    border-bottom: none;
}

.post-title a:hover {
    color: var(--accent);
    border-bottom: none;
}

.post-meta {
    display: flex;
    gap: 16px;
    font-size: 0.75rem;
    color: var(--gray-600);
    margin-bottom: 16px;
}

.post-meta i {
    margin-right: 4px;
    font-size: 0.7rem;
}

.post-excerpt {
    font-size: 0.9rem;
    color: var(--gray-700);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;
    white-space: normal;
}

/* ========== 分页 ========== */
.pagination {
    margin-top: 40px;
    text-align: center;
}

.pagination ul {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    list-style: none;
}

.pagination ul li a,
.pagination ul li span {
    display: inline-block;
    min-width: 36px;
    padding: 6px 12px;
    background: var(--white);
    border: 1px solid var(--gray-300);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--gray-700);
}

.pagination ul li a:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--white);
}

.pagination ul li.active span {
    background: var(--gray-800);
    border-color: var(--gray-800);
    color: var(--white);
}

/* ========== 侧边栏 ========== */
.sidebar-widget {
    background: var(--white);
    border: 1px solid var(--gray-300);
    margin-bottom: 32px;
    display: block;
    width: 100%;
}

.widget-header {
    font-size: 1rem;
    font-weight: 600;
    padding: 16px 20px 12px;
    border-bottom: 1px solid var(--gray-300);
    letter-spacing: -0.2px;
}

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

.about-text {
    font-size: 0.85rem;
    color: var(--gray-700);
    line-height: 1.6;
}

.hot-list {
    list-style: none;
}

.hot-list li {
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px dashed var(--gray-300);
}

.hot-list li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.hot-list a {
    font-size: 0.85rem;
    color: var(--gray-700);
    display: block;
    line-height: 1.4;
}

.hot-list a:hover {
    color: var(--accent);
    transform: translateX(4px);
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag-cloud a {
    background: var(--gray-100);
    padding: 4px 12px;
    font-size: 0.75rem;
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
    display: inline-block;
}

.tag-cloud a:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--white);
}

.ad-placeholder {
    text-align: center;
    padding: 20px;
    background: var(--gray-100);
    font-size: 0.8rem;
    color: var(--gray-600);
}

/* ========== 文章详情页 ========== */
.article-header {
    margin-bottom: 40px;
    text-align: center;
}

.article-title {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    line-height: 1.3;
    margin-bottom: 16px;
    color: var(--gray-800);
}

.article-meta {
    display: flex;
    justify-content: center;
    gap: 20px;
    font-size: 0.8rem;
    color: var(--gray-600);
}

.article-body {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--gray-800);
}

.article-body h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 32px 0 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--gray-300);
}

.article-body h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 28px 0 12px;
}

.article-body p {
    margin-bottom: 1.25em;
}

.article-body img {
    max-width: 100%;
    height: auto;
    margin: 24px auto;
    display: block;
    border: 1px solid var(--gray-300);
}

/* 代码块 */
.code-block {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 20px;
    margin: 24px 0;
    overflow-x: auto;
    font-family: "SF Mono", "Fira Code", "Consolas", monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    border-left: 4px solid var(--accent);
}

.code-block pre {
    margin: 0;
    white-space: pre-wrap;
    word-break: break-word;
}

/* 引用块 */
.article-body blockquote {
    margin: 24px 0;
    padding: 16px 24px;
    background: var(--gray-100);
    border-left: 4px solid var(--gray-500);
    color: var(--gray-700);
    font-style: italic;
}

/* 表格 */
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
}

.article-body th,
.article-body td {
    border: 1px solid var(--gray-300);
    padding: 8px 12px;
    text-align: left;
}

.article-body th {
    background: var(--gray-100);
    font-weight: 600;
}

/* 版权声明 */
.post-copyright {
    margin: 40px 0;
    padding: 16px 20px;
    background: var(--gray-100);
    font-size: 0.8rem;
    color: var(--gray-600);
    text-align: center;
    border-top: 1px solid var(--gray-300);
    border-bottom: 1px solid var(--gray-300);
}

/* 相关推荐 */
.related-posts {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--gray-300);
}

.related-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: -0.2px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    list-style: none;
}

.related-grid li a {
    display: block;
    padding: 8px 0 8px 20px;
    background: var(--gray-100);
    font-size: 0.85rem;
    color: var(--gray-700);
    position: relative;
    border-bottom: none;
}

.related-grid li a:before {
    content: "›";
    position: absolute;
    left: 8px;
    color: var(--accent);
    font-size: 1rem;
}

.related-grid li a:hover {
    background: var(--accent);
    color: var(--white);
}

/* ========== 页脚 ========== */
.site-footer {
    background: var(--white);
    border-top: 1px solid var(--gray-300);
    padding: 40px 0;
    text-align: center;
    font-size: 0.75rem;
    color: var(--gray-600);
    margin-top: 60px;
}

.footer-links {
    margin-top: 12px;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* ========================================
   响应式设计 - 针对不同设备精细调节
   ======================================== */

/* 平板设备 (iPad 竖屏/横屏，宽度 768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
    /* 增加容器左右留白，让头部不贴边 */
    .container,
    .container-narrow {
        padding: 0 40px !important;
    }
    /* 主内容卡片内边距同步增加 */
    .content-card {
        padding: 36px 40px !important;
    }
    /* 保持布局为两栏，但间距调整 */
    .layout-grid {
        gap: 36px;
    }
    .sidebar {
        width: 260px;
    }
    /* 文章卡片保持横向，但缩略图稍微缩小 */
    .post-card {
        gap: 24px;
    }
    .post-thumb {
        width: 220px;
    }
    /* 确保头部内容不换行错位 */
    .header-container {
        justify-content: space-between;
    }
    .main-nav ul {
        gap: 20px;
    }
}

/* 笔记本及大屏幕 (≥1025px) 保持默认留白 */
@media (min-width: 1025px) {
    .container {
        padding: 0 24px;
    }
}

/* 手机 (宽度 ≤ 767px) 保持紧凑留白 */
@media (max-width: 767px) {
    .container,
    .container-narrow {
        padding: 0 16px !important;
    }
    .layout-grid {
        flex-direction: column;
        gap: 32px;
        margin: 20px auto;
    }
    .sidebar {
        width: 100%;
        order: 2;
    }
    .content-main {
        order: 1;
        width: 100%;
    }
    .content-card {
        padding: 20px 16px !important;
        border-left: none;
        border-right: none;
    }
    .post-card {
        flex-direction: column;
        gap: 12px;
        padding-bottom: 20px;
    }
    .post-thumb {
        width: 100%;
        max-width: 100%;
    }
    .post-thumb img {
        max-height: 180px;
        object-fit: cover;
    }
    .post-title {
        font-size: 1.2rem;
    }
    .post-excerpt {
        font-size: 0.85rem;
        -webkit-line-clamp: 2;
    }
    /* 头部垂直排列，消除右侧空白 */
    .header-container {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 12px 0;
    }
    .logo-area {
        justify-content: center;
        width: 100%;
    }
    .main-nav ul {
        justify-content: center;
        gap: 12px;
        flex-wrap: wrap;
    }
    /* 面包屑滚动支持 */
    .breadcrumb .container {
        white-space: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 4px;
    }
    .pagination ul li a,
    .pagination ul li span {
        padding: 4px 10px;
        min-width: 32px;
        font-size: 0.75rem;
    }
    .article-title {
        font-size: 1.5rem;
    }
    .article-meta {
        gap: 12px;
        flex-wrap: wrap;
    }
    .code-block {
        font-size: 0.75rem;
        padding: 12px;
        overflow-x: auto;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .post-copyright,
    .site-footer p {
        word-break: break-word;
    }
}

/* 极小屏 (宽度 ≤ 480px) 进一步精简 */
@media (max-width: 480px) {
    .content-card {
        padding: 16px 12px !important;
    }
    .post-meta {
        gap: 8px;
        font-size: 0.7rem;
    }
    .widget-header {
        padding: 12px 16px 8px;
        font-size: 0.95rem;
    }
    .widget-content {
        padding: 12px 16px;
    }
}

/* 全局强制换行，防止溢出 */
body, p, li, .post-excerpt, .about-text, .widget-content, .breadcrumb {
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;
}

/* 图片/表格/代码块自适应 */
img, iframe, video, table, .code-block {
    max-width: 100%;
    height: auto;
}
table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
}

/* 修复任何可能的横向滚动条 */
html, body {
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
}