/* ============================================================
   liuyibin.com —— 全站样式
   结构：1 设计令牌 → 2 基础排版 → 3 通用布局 → 4 按钮/标签 →
         5 卡片 → 6 导航 → 7 页脚 → 8 时间线 → 9 爱好 →
         10 照片墙 → 11 文章 → 12 交互与动画 → 13 响应式
   约定：颜色/圆角/阴影只允许在此文件定义为令牌，页面样式一律 var() 引用
   ============================================================ */

/* ==================== 1. 设计令牌 ==================== */
:root {
  /* 主题色：参考 iOS 系统色（System Blue / System Teal），平面化、不使用渐变 */
  --site-primary: #007aff;
  --site-primary-strong: #0062cc;
  --site-accent: #5ac8fa;
  --site-warm: #ff9500;

  /* 文字与背景：对应 iOS 的 Label / Secondary Label / System Gray 6 */
  --site-ink: #1c1c1e;
  --site-muted: #6e6e73;
  --site-bg: #f2f2f7;
  --site-surface: #ffffff;
  --site-surface-muted: #f2f2f7;
  --site-border: rgba(60, 60, 67, 0.12);
  --site-border-strong: rgba(60, 60, 67, 0.24);

  /* 形状与阴影：iOS 偏小圆角 + 极轻阴影，避免"立体感过强" */
  --site-radius: 14px;
  --site-radius-sm: 10px;
  --site-radius-pill: 999px;
  --site-shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 10px 24px -18px rgba(0, 0, 0, 0.28);
  --site-shadow-hover: 0 2px 6px rgba(0, 0, 0, 0.06), 0 18px 36px -20px rgba(0, 0, 0, 0.34);

  /* 页脚（深色块）与尺寸 */
  --site-footer-bg: #1c1c1e;
  --site-container: 1140px;

  /* 动效 */
  --site-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --site-duration: 280ms;

  /* 字体：仅系统字体栈，不引入外部字体 */
  --site-font-sans: system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;

  /* Bootstrap 变量对齐（不覆盖组件编译色，仅用于链接与焦点色） */
  --bs-body-font-family: var(--site-font-sans);
  --bs-body-color: var(--site-ink);
  --bs-link-color: var(--site-primary);
  --bs-link-hover-color: var(--site-primary-strong);
  --bs-primary: var(--site-primary);
}

/* ==================== 2. 基础排版 ==================== */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem; /* 锚点跳转时避开吸顶导航 */
}

body {
  font-family: var(--site-font-sans);
  color: var(--site-ink);
  background-color: var(--site-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--site-ink);
}

a {
  text-decoration: none;
  transition: color var(--site-duration) var(--site-ease);
}

/* 焦点可见性：不删除浏览器默认轮廓，保证键盘可用（conventions §6） */
:focus-visible {
  outline: 3px solid var(--site-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ==================== 3. 通用布局 ==================== */
.site-section {
  padding: clamp(2.5rem, 1.5rem + 3vw, 4.5rem) 0;
}

.site-section-alt {
  background: var(--site-surface);
}

.site-section-head {
  max-width: 46rem;
  margin-bottom: clamp(1.5rem, 1rem + 1.5vw, 2.5rem);
}

.site-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--site-primary);
  background: var(--site-surface-muted);
  border-radius: var(--site-radius-pill);
  padding: 0.3rem 0.85rem;
  margin-bottom: 0.85rem;
}

.site-section-title {
  font-size: clamp(1.4rem, 1.1rem + 1.4vw, 2.1rem);
  margin-bottom: 0.6rem;
}

.site-section-desc {
  color: var(--site-muted);
  margin-bottom: 0;
  line-height: 1.8;
}

.site-divider-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.site-divider-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--site-border);
}

/* 面包屑：文章详情、照片详情等二级页面共用 */
.site-breadcrumb {
  font-size: 0.85rem;
}

.site-breadcrumb .breadcrumb {
  --bs-breadcrumb-divider-color: var(--site-muted);
}

.site-breadcrumb a {
  color: var(--site-muted);
}

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

.site-breadcrumb .active {
  color: var(--site-ink);
  font-weight: 600;
}

/* 跳转到主内容：键盘用户的第一个可聚焦元素 */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 1080;
  padding: 0.6rem 1rem;
  background: var(--site-primary-strong);
  color: #fff;
  border-radius: var(--site-radius-sm);
  transition: top var(--site-duration) var(--site-ease);
}

.skip-link:focus {
  top: 1rem;
  color: #fff;
}

/* 空状态 / 错误提示 */
.site-empty-icon {
  font-size: 2.5rem;
  color: var(--site-border-strong);
}

.site-alert {
  border: 1px solid var(--site-border);
  border-radius: var(--site-radius-sm);
}

/* ==================== 4. 按钮与标签 ==================== */
.btn-brand {
  --bs-btn-bg: var(--site-primary);
  --bs-btn-border-color: var(--site-primary);
  --bs-btn-color: #fff;
  --bs-btn-hover-bg: var(--site-primary-strong);
  --bs-btn-hover-border-color: var(--site-primary-strong);
  --bs-btn-hover-color: #fff;
  --bs-btn-active-bg: var(--site-primary-strong);
  --bs-btn-active-border-color: var(--site-primary-strong);
  --bs-btn-focus-shadow-rgb: 0, 122, 255;
  border-radius: var(--site-radius-sm);
  padding: 0.55rem 1.35rem;
  font-weight: 600;
}

.btn-outline-brand {
  --bs-btn-color: var(--site-primary);
  --bs-btn-border-color: var(--site-border-strong);
  --bs-btn-hover-bg: var(--site-primary);
  --bs-btn-hover-border-color: var(--site-primary);
  --bs-btn-hover-color: #fff;
  --bs-btn-active-bg: var(--site-primary-strong);
  --bs-btn-active-border-color: var(--site-primary-strong);
  --bs-btn-active-color: #fff;
  border-radius: var(--site-radius-sm);
  padding: 0.55rem 1.35rem;
  font-weight: 600;
}

.site-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.site-tag {
  display: inline-block;
  font-size: 0.76rem;
  line-height: 1.6;
  padding: 0.1rem 0.6rem;
  border-radius: var(--site-radius-pill);
  color: var(--site-primary);
  background: var(--site-surface-muted);
  border: 1px solid var(--site-border);
}

.site-tag-strong {
  color: #fff;
  background: var(--site-primary);
  border-color: var(--site-primary);
  font-weight: 600;
}

/* "示例待补充"角标：提醒这是一条占位内容，见 AGENTS.md §6 */
.site-badge-demo {
  display: inline-flex;
  align-items: center;
  font-size: 0.72rem;
  padding: 0.1rem 0.55rem;
  border-radius: var(--site-radius-pill);
  color: #8a5a00;
  background: rgba(255, 149, 0, 0.15);
  border: 1px dashed rgba(255, 149, 0, 0.55);
}

.site-badge-pin {
  display: inline-flex;
  align-items: center;
  font-size: 0.72rem;
  padding: 0.1rem 0.55rem;
  border-radius: var(--site-radius-pill);
  color: #fff;
  background: var(--site-primary);
}

/* ==================== 5. 卡片 ==================== */
.card-soft {
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: var(--site-radius);
  box-shadow: var(--site-shadow);
  padding: clamp(1.1rem, 0.9rem + 0.6vw, 1.6rem);
  transition: transform var(--site-duration) var(--site-ease),
    box-shadow var(--site-duration) var(--site-ease),
    border-color var(--site-duration) var(--site-ease);
}

.card-soft:hover {
  transform: translateY(-4px);
  box-shadow: var(--site-shadow-hover);
  border-color: var(--site-border-strong);
}

.site-fact-card {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  height: 100%;
}

.site-fact-icon {
  flex: 0 0 auto;
  width: 2.6rem;
  height: 2.6rem;
  display: grid;
  place-items: center;
  border-radius: var(--site-radius-sm);
  color: #fff;
  background: var(--site-primary);
  font-size: 1.15rem;
}

.site-fact-label {
  font-size: 0.78rem;
  color: var(--site-muted);
  margin-bottom: 0.15rem;
  letter-spacing: 0.04em;
}

.site-fact-value {
  margin-bottom: 0;
  font-weight: 600;
  line-height: 1.6;
}

/* ==================== 6. 导航栏 ==================== */
/* 吸顶容器：滚动时导航始终固定在视口顶部（sticky 加在 header 上，
   避免 .site-navbar 自身高度塌陷导致粘连失效） */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
}

.site-navbar {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--site-border);
  padding-top: 0.6rem;
  padding-bottom: 0.6rem;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.site-brand-mark {
  width: 2.35rem;
  height: 2.35rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  color: #fff;
  background: var(--site-primary);
  box-shadow: var(--site-shadow);
}

.site-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.site-brand-text strong {
  font-size: 1rem;
  color: var(--site-ink);
}

.site-brand-text small {
  font-size: 0.7rem;
  color: var(--site-muted);
  letter-spacing: 0.04em;
}

.site-nav-link {
  display: inline-flex;
  align-items: center;
  border-radius: var(--site-radius-pill);
  padding: 0.45rem 0.85rem !important;
  color: var(--site-ink);
  font-weight: 500;
}

.site-nav-link:hover {
  color: var(--site-primary);
  background: var(--site-surface-muted);
}

.site-nav-link.is-active {
  color: #fff;
  background: var(--site-primary);
  font-weight: 600;
}

.site-navbar-toggler {
  border: 1px solid var(--site-border);
  border-radius: var(--site-radius-sm);
}

.site-navbar-toggler:focus {
  box-shadow: none;
}

/* ==================== 7. 页脚 ==================== */
.site-footer {
  margin-top: clamp(2.5rem, 2rem + 2vw, 4rem);
  padding: clamp(2rem, 1.5rem + 2vw, 3rem) 0 1.5rem;
  background: var(--site-footer-bg);
  color: rgba(255, 255, 255, 0.78);
}

.site-footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-footer-name {
  font-weight: 700;
  color: #fff;
}

.site-footer-slogan {
  font-size: 0.85rem;
  color: var(--site-accent);
  letter-spacing: 0.04em;
}

.site-footer-note {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

.site-footer-title {
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 0.85rem;
}

.site-footer-links li + li {
  margin-top: 0.45rem;
}

.site-footer-links a {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.9rem;
}

.site-footer-links a:hover {
  color: #fff;
}

.site-socials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.site-social {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--site-radius-pill);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.site-social:hover {
  color: #fff;
  border-color: var(--site-accent);
  background: rgba(90, 200, 250, 0.14);
}

.site-social.is-pending {
  color: rgba(255, 255, 255, 0.42);
  border-style: dashed;
  cursor: not-allowed;
}

.site-footer-meta {
  margin-top: 0.85rem;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

.site-footer-divider {
  margin: 1.75rem 0 1rem;
  border-color: rgba(255, 255, 255, 0.12);
  opacity: 1;
}

.site-footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

.site-footer-icp {
  color: rgba(255, 255, 255, 0.5);
}

/* ==================== 8. 时间线 ==================== */
.site-timeline {
  position: relative;
}

.site-timeline-item {
  position: relative;
  padding-left: 3.4rem;
  padding-bottom: 1.25rem;
}

.site-timeline-item::before {
  content: '';
  position: absolute;
  left: 1.2rem;
  top: 2.6rem;
  bottom: -0.25rem;
  width: 2px;
  background: var(--site-border-strong);
}

.site-timeline-item:last-child {
  padding-bottom: 0;
}

.site-timeline-item:last-child::before {
  display: none;
}

.site-timeline-dot {
  position: absolute;
  left: 0.15rem;
  top: 0.35rem;
  width: 2.15rem;
  height: 2.15rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--site-primary);
  box-shadow: var(--site-shadow);
  font-size: 0.95rem;
}

.site-timeline-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.4rem;
}

.site-timeline-date {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--site-primary);
  letter-spacing: 0.04em;
}

.site-timeline-title {
  font-size: 1.02rem;
  margin-bottom: 0.3rem;
}

.site-timeline-desc {
  color: var(--site-muted);
  font-size: 0.92rem;
  line-height: 1.75;
}

/* ==================== 9. 爱好 ==================== */
.site-hobby-card {
  display: flex;
  flex-direction: column;
}

.site-hobby-head {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.7rem;
}

.site-hobby-icon {
  flex: 0 0 auto;
  width: 2.7rem;
  height: 2.7rem;
  display: grid;
  place-items: center;
  border-radius: var(--site-radius-sm);
  font-size: 1.2rem;
  color: var(--site-primary);
  background: var(--site-surface-muted);
  border: 1px solid var(--site-border);
}

.site-hobby-name {
  font-size: 1.05rem;
  margin-bottom: 0;
}

.site-hobby-level {
  font-size: 0.76rem;
  color: var(--site-muted);
}

.site-hobby-desc {
  color: var(--site-muted);
  font-size: 0.92rem;
  line-height: 1.75;
  flex: 1;
}

/* 标签云 */
.site-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.site-cloud-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: var(--site-radius-pill);
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  color: var(--site-ink);
  font-weight: 500;
  box-shadow: var(--site-shadow);
  transition: transform var(--site-duration) var(--site-ease),
    color var(--site-duration) var(--site-ease),
    border-color var(--site-duration) var(--site-ease);
}

.site-cloud-item i {
  color: var(--site-primary);
}

.site-cloud-item:hover {
  color: var(--site-primary);
  border-color: var(--site-border-strong);
  transform: translateY(-3px);
}

/* 分类筛选 */
.site-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.site-filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.95rem;
  border-radius: var(--site-radius-pill);
  border: 1px solid var(--site-border);
  background: var(--site-surface);
  color: var(--site-ink);
  font-size: 0.88rem;
  transition: all var(--site-duration) var(--site-ease);
}

.site-filter-btn:hover {
  border-color: var(--site-border-strong);
  color: var(--site-primary);
}

.site-filter-btn.is-active {
  background: var(--site-primary);
  border-color: var(--site-primary);
  color: #fff;
  font-weight: 600;
}

.site-filter-count {
  font-size: 0.75rem;
  padding: 0 0.4rem;
  border-radius: var(--site-radius-pill);
  background: rgba(255, 255, 255, 0.25);
}

/* ==================== 10. 照片墙 ==================== */
.site-gallery-item {
  margin: 0 0 1.5rem;
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: var(--site-radius);
  overflow: hidden;
  box-shadow: var(--site-shadow);
  transition: transform var(--site-duration) var(--site-ease),
    box-shadow var(--site-duration) var(--site-ease);
}

.site-gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--site-shadow-hover);
}

/* 整卡链接：点击进入照片详情页（颜色继承卡片文字色，避免整块变蓝） */
.site-gallery-link {
  display: block;
  color: var(--site-ink);
}

.site-gallery-link:hover {
  color: var(--site-ink);
}

.site-gallery-count {
  display: inline-flex;
  align-items: center;
  font-size: 0.72rem;
  padding: 0.1rem 0.5rem;
  border-radius: var(--site-radius-pill);
  color: var(--site-primary);
  background: var(--site-surface-muted);
  border: 1px solid var(--site-border);
}

.site-gallery-media {
  position: relative;
  overflow: hidden;
  background: var(--site-surface-muted);
}

.site-gallery-media.is-square { aspect-ratio: 1 / 1; }
.site-gallery-media.is-landscape { aspect-ratio: 16 / 10; }
.site-gallery-media.is-portrait { aspect-ratio: 4 / 5; }

.site-gallery-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 400ms var(--site-ease);
}

.site-gallery-item:hover .site-gallery-img {
  transform: scale(1.04);
}

.site-gallery-badge {
  position: absolute;
  right: 0.6rem;
  bottom: 0.6rem;
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--site-ink);
  background: rgba(255, 255, 255, 0.9);
  font-size: 0.9rem;
}

.site-gallery-caption {
  padding: 0.85rem 1rem 1rem;
}

.site-gallery-title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

.site-gallery-title {
  font-size: 0.98rem;
  margin-bottom: 0;
}

.site-gallery-desc {
  font-size: 0.86rem;
  color: var(--site-muted);
  margin: 0.35rem 0 0.5rem;
  line-height: 1.7;
}

.site-gallery-meta {
  font-size: 0.78rem;
  color: var(--site-muted);
}

/* ==================== 11. 文章 ==================== */
.site-post-card {
  display: flex;
  flex-direction: column;
}

.site-post-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.6rem;
}

.site-post-title {
  font-size: 1.12rem;
  line-height: 1.5;
  margin-bottom: 0.5rem;
}

.site-post-title a {
  color: var(--site-ink);
}

.site-post-title a:hover {
  color: var(--site-primary);
}

.site-post-summary {
  color: var(--site-muted);
  font-size: 0.92rem;
  line-height: 1.75;
  flex: 1;
}

.site-post-foot {
  margin-top: 0.9rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--site-border);
  font-size: 0.8rem;
  color: var(--site-muted);
}

/* 文章详情正文排版 */
.site-article {
  max-width: 46rem;
}

.site-article-title {
  font-size: clamp(1.5rem, 1.2rem + 1.6vw, 2.2rem);
  line-height: 1.35;
  margin-bottom: 0.6rem;
}

.site-article-meta {
  font-size: 0.84rem;
  color: var(--site-muted);
}

.site-article-summary {
  margin-top: 0.85rem;
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--site-accent);
  background: var(--site-surface-muted);
  border-radius: 0 var(--site-radius-sm) var(--site-radius-sm) 0;
  color: var(--site-muted);
  font-size: 0.94rem;
}

.site-article-body {
  margin-top: 1.75rem;
  font-size: 1rem;
  line-height: 1.95;
  color: var(--site-ink);
}

.site-article-body h2 {
  font-size: 1.25rem;
  margin: 2rem 0 0.75rem;
  padding-left: 0.75rem;
  border-left: 4px solid var(--site-primary);
}

.site-article-body h3 {
  font-size: 1.08rem;
  margin: 1.5rem 0 0.6rem;
}

.site-article-body p {
  margin-bottom: 1.05rem;
}

.site-article-body ul,
.site-article-body ol {
  margin-bottom: 1.1rem;
  padding-left: 1.4rem;
}

.site-article-body li {
  margin-bottom: 0.4rem;
}

.site-article-body blockquote {
  margin: 1.25rem 0;
  padding: 0.9rem 1.1rem;
  background: var(--site-surface-muted);
  border-radius: var(--site-radius-sm);
  border-left: 3px solid var(--site-primary);
  color: var(--site-muted);
}

.site-article-body blockquote p:last-child {
  margin-bottom: 0;
}

.site-article-body code {
  background: var(--site-surface-muted);
  color: var(--site-primary-strong);
  padding: 0.1rem 0.35rem;
  border-radius: 6px;
  font-size: 0.9em;
}

.site-article-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--site-border);
}

/* ==================== 12. 交互与动画 ==================== */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 480ms var(--site-ease), transform 480ms var(--site-ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.site-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 1030;
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 50%;
  color: #fff;
  background: var(--site-primary);
  box-shadow: var(--site-shadow-hover);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--site-duration) var(--site-ease),
    transform var(--site-duration) var(--site-ease),
    visibility var(--site-duration);
}

.site-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

/* ==================== 13. 响应式微调 ==================== */
@media (max-width: 991.98px) {
  .site-nav-link {
    padding: 0.55rem 0.85rem !important;
  }

  .navbar-collapse {
    margin-top: 0.6rem;
    padding-top: 0.6rem;
    border-top: 1px solid var(--site-border);
    /* 展开的菜单过高时在内部滚动，避免撑破吸顶导航 */
    max-height: calc(100vh - 5.5rem);
    overflow-y: auto;
  }
}

@media (max-width: 575.98px) {
  .site-timeline-item {
    padding-left: 2.85rem;
  }

  .site-timeline-item::before {
    left: 1rem;
  }

  .site-timeline-dot {
    width: 1.9rem;
    height: 1.9rem;
    font-size: 0.85rem;
  }

  .card-soft {
    padding: 1rem;
  }

  .site-footer-bottom {
    flex-direction: column;
  }
}

/* 无障碍：用户系统开启"减少动态效果"时全部降级为静态 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}