/* ==========================================================================
   深圳市平冈中学校友会 · 官网样式
   配色取自会徽：墨绿 + 暖金 + 米白；纯 CSS，无外部字体 / 图标 / 依赖。
   移动端优先，断点依次为 560px、720px、900px。
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
  --green-950: #082417;
  --green-900: #0B3320;
  --green-800: #0E3D27;
  --green-700: #155238;
  --green-100: #E7EEE9;

  --gold: #C8A15C;        /* 装饰用金：细线、编号、深底文字 */
  --gold-soft: #E7D3A6;   /* 深色背景上的浅金 */
  --gold-ink: #84602A;    /* 浅色背景上的金色文字（满足对比度） */

  --cream: #FBFCF7;       /* 页面底色，与会徽底色一致 */
  --paper: #F3F0E4;
  --surface: #FFFDF8;
  --line: #DCD5C2;

  --ink: #1B2A22;
  --ink-soft: #4A5A50;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
               "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  --font-serif: "Songti SC", "STSong", "SimSun",
                "Source Han Serif SC", "Noto Serif CJK SC", serif;

  --radius: 10px;
  --container: 1120px;
  --shadow: 0 22px 48px -30px rgba(8, 36, 23, 0.45);
  --header-offset: 9.5rem; /* 移动端粘性头部高度，用于锚点定位补偿 */
}

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}

p {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: var(--green-800);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--gold-ink);
}

/* 键盘焦点清晰可见；深色页脚使用浅金保证对比度 */
:focus-visible {
  outline: 3px solid var(--gold-ink);
  outline-offset: 3px;
}

.site-footer :focus-visible {
  outline-color: var(--gold-soft);
}

/* 正文中的锚点跳转不被粘性头部遮挡 */
[id] {
  scroll-margin-top: var(--header-offset);
}

/* ---------- 通用布局 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2.5rem);
}

.section {
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.section--cream {
  background: var(--cream);
}

.section--paper {
  background: var(--paper);
}

/* 板块标题：中文标题 + 金色序号眉标 */
.section-head {
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--gold-ink);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
}

.eyebrow span {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1rem;
  letter-spacing: 0.06em;
}

.eyebrow span::after {
  content: "/";
  margin-left: 0.35rem;
  color: var(--line);
}

.section h2 {
  margin-top: 0.45rem;
  font-size: clamp(1.65rem, 4.2vw, 2.5rem);
  letter-spacing: 0.03em;
}

.section-lead {
  max-width: 62ch;
  margin-top: 0.9rem;
  color: var(--ink-soft);
}

/* ---------- 跳到主要内容 ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 100;
  padding: 0.7rem 1.1rem;
  background: var(--green-800);
  color: var(--cream);
  border-radius: 0 0 8px 8px;
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
  color: var(--cream);
}

/* ---------- 顶部：登记信息条 + 品牌 + 锚点导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251, 252, 247, 0.97);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.topbar {
  background: var(--green-900);
  color: #F2EDDD;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

.topbar-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
  padding-block: 0.4rem;
}

.topbar-dot {
  color: var(--gold-soft);
}

.header-inner {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-block: 0.65rem 0.35rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}

/* 会徽已裁剪为正方形，圆形裁切后与徽章外形一致 */
.brand-logo {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  border-radius: 50%;
  object-fit: cover;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.brand-text strong {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  letter-spacing: 0.04em;
  color: var(--green-900);
  line-height: 1.3;
}

.brand-text span {
  overflow: hidden;
  color: var(--ink-soft);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-nav ul {
  display: flex;
  gap: 0.15rem;
  overflow-x: auto;
  padding-block: 0.3rem;
  border-top: 1px solid var(--line);
  scrollbar-width: none;
  overscroll-behavior-x: contain;
}

.site-nav ul::-webkit-scrollbar {
  display: none;
}

.site-nav a {
  display: block;
  padding: 0.6rem 0.7rem;
  border-radius: 6px;
  color: var(--ink);
  font-size: 0.9rem;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav a:hover {
  background: var(--paper);
  color: var(--green-800);
}

/* 窄屏导航可横向滚动：右侧渐隐提示仍有内容；预留尾部内边距，
   滚动到末尾时最后一项不会被渐隐区域遮住 */
@media (max-width: 899px) {
  .site-nav ul {
    padding-right: 2.5rem;
    -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 2.5rem), transparent 100%);
    mask-image: linear-gradient(to right, #000 calc(100% - 2.5rem), transparent 100%);
  }
}

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  background: linear-gradient(180deg, var(--cream) 0%, #F6F2E6 100%);
}

/* 右上角淡金圆形光晕，纯 CSS 装饰，不承载信息 */
.hero::before {
  content: "";
  position: absolute;
  top: -22rem;
  right: -12rem;
  width: 40rem;
  height: 40rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 161, 92, 0.22) 0%, rgba(200, 161, 92, 0) 68%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
}

.hero-eyebrow {
  color: var(--gold-ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  line-height: 1.6;
}

.hero h1 {
  margin-top: 0.6rem;
  font-size: clamp(2rem, 7.5vw, 3.4rem);
  letter-spacing: 0.05em;
  color: var(--green-900);
}

.hero-tagline {
  margin-top: 0.65rem;
  color: var(--gold-ink);
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2.6vw, 1.2rem);
  letter-spacing: 0.08em;
}

.hero-summary {
  max-width: 60ch;
  margin-top: 1.25rem;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px; /* 触屏可点击尺寸 */
  padding: 0.6rem 1.35rem;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background: var(--green-800);
  color: var(--cream);
}

.btn-primary:hover {
  background: var(--green-700);
  color: var(--cream);
}

.btn-ghost {
  border-color: var(--green-800);
  color: var(--green-800);
  background: transparent;
}

.btn-ghost:hover {
  background: var(--green-800);
  color: var(--cream);
}

.hero-facts {
  display: grid;
  gap: 0.75rem;
  margin-top: 2rem;
}

.fact {
  padding: 0.85rem 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 2px solid var(--gold);
  border-radius: 0 0 8px 8px;
}

.fact-label {
  display: block;
  color: var(--ink-soft);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}

.fact-value {
  display: block;
  margin-top: 0.15rem;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--green-900);
}

/* 首屏会徽 */
.seal {
  display: grid;
  justify-items: center;
  align-content: center;
  margin: 0;
}

.seal-frame {
  width: clamp(200px, 58vw, 300px);
  aspect-ratio: 1;
  padding: 12px;
  border: 1px solid var(--gold-soft);
  border-radius: 50%;
  background: radial-gradient(circle, #FFFEF9 0%, #F3EDDC 100%);
  box-shadow: var(--shadow);
}

.seal-frame img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.seal figcaption {
  margin-top: 1rem;
  color: var(--gold-ink);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-align: center;
}

/* ---------- 01 简介 ---------- */
.about-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.prose p + p {
  margin-top: 1rem;
}

.prose p {
  max-width: 68ch;
  color: var(--ink-soft);
}

.member-note {
  padding: 0.9rem 1.15rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--gold);
  border-radius: 0 8px 8px 0;
  color: var(--ink) !important;
}

.member-note strong {
  color: var(--gold-ink);
  font-family: var(--font-serif);
  font-size: 1.35em;
}

/* 宗旨：深绿卡片强调，内容逐字来自任务文档 */
.purpose {
  padding: clamp(1.5rem, 4vw, 2rem);
  background: linear-gradient(155deg, var(--green-800) 0%, var(--green-950) 100%);
  border-radius: var(--radius);
  color: #F5F0E2;
  box-shadow: var(--shadow);
}

.purpose h3 {
  color: var(--gold-soft);
  font-size: 1rem;
  letter-spacing: 0.14em;
}

.purpose ul {
  margin-top: 0.75rem;
}

.purpose li {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding-block: 0.6rem;
  border-bottom: 1px solid rgba(231, 211, 166, 0.22);
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2.4vw, 1.2rem);
  letter-spacing: 0.04em;
}

.purpose li:last-child {
  border-bottom: 0;
}

.purpose li::before {
  content: "";
  width: 6px;
  height: 6px;
  flex-shrink: 0;
  background: var(--gold);
  transform: rotate(45deg);
}

/* 里程碑与会员规模 */
.milestones {
  display: grid;
  gap: 1rem;
  margin-top: clamp(2rem, 5vw, 3rem);
}

.milestone {
  padding: 1.35rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.milestone time {
  display: block;
  color: var(--gold-ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.15rem;
  letter-spacing: 0.06em;
}

.milestone h3 {
  margin-top: 0.35rem;
  font-size: 1.05rem;
}

.milestone p {
  margin-top: 0.4rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.milestone--members {
  background: var(--green-100);
  border-color: #CFDDD3;
}

.milestone-number {
  display: block;
  color: var(--green-800);
  font-family: var(--font-serif);
  font-size: 2.2rem;
  line-height: 1.1;
}

/* ---------- 02 组织架构 ---------- */
.governance {
  display: grid;
  gap: 0.75rem;
}

.gov-card {
  padding: 1.35rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.gov-card h3 {
  font-size: 1.3rem;
}

.gov-card p {
  margin-top: 0.3rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
}

.gov-card--primary {
  background: var(--green-800);
  border-color: var(--green-800);
  color: var(--cream);
}

.gov-card--primary h3 {
  color: var(--cream);
}

.gov-card--primary p {
  color: var(--gold-soft);
}

/* 箭头在窄屏竖向排列时旋转 90 度 */
.gov-arrow {
  color: var(--gold-ink);
  font-size: 1.4rem;
  text-align: center;
  line-height: 1;
  transform: rotate(90deg);
}

.subhead {
  margin-top: clamp(2rem, 5vw, 3rem);
  padding-left: 0.7rem;
  border-left: 3px solid var(--gold);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}

.leaders {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 1.1rem;
}

.leader {
  padding: 1.1rem 1.2rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.leader-role {
  color: var(--gold-ink);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.leader-name {
  margin-top: 0.25rem;
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  letter-spacing: 0.06em;
}

.leader--chair {
  background: linear-gradient(155deg, var(--green-800), var(--green-950));
  border-color: var(--green-800);
}

.leader--chair .leader-role {
  color: var(--gold-soft);
}

.leader--chair .leader-name {
  color: var(--cream);
}

/* 理事名单折叠：原生 details，键盘可直接展开 */
.council {
  margin-top: 2rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.council summary {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 1rem;
  padding: 1.05rem 3.2rem 1.05rem 1.3rem;
  cursor: pointer;
  list-style: none;
}

.council summary::-webkit-details-marker {
  display: none;
}

.council summary::after {
  position: absolute;
  top: 50%;
  right: 1.3rem;
  transform: translateY(-50%);
  content: "+";
  color: var(--gold-ink);
  font-family: Georgia, serif;
  font-size: 1.4rem;
  line-height: 1;
}

.council[open] summary::after {
  content: "−";
}

.council-title {
  font-weight: 600;
  letter-spacing: 0.04em;
}

.council-meta {
  color: var(--ink-soft);
  font-size: 0.8rem;
}

.council-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
  padding: 0 1.3rem 1.3rem;
}

.council-list li {
  padding: 0.55rem 0.6rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 0.92rem;
  text-align: center;
}

/* ---------- 03 业务范围 ---------- */
.business-grid {
  display: grid;
  gap: 1rem;
}

.business-card {
  padding: clamp(1.3rem, 3vw, 1.75rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--green-800);
  border-radius: var(--radius);
}

.business-index {
  color: var(--gold-ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.3rem;
  letter-spacing: 0.06em;
}

.business-card h3 {
  margin-top: 0.35rem;
  font-size: 1.12rem;
}

.business-card p {
  margin-top: 0.6rem;
  color: var(--ink-soft);
  font-size: 0.94rem;
}

/* ---------- 04 经费与合规 ---------- */
.finance-grid {
  display: grid;
  gap: 1rem;
}

.finance-card {
  padding: 1.35rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.finance-card h3 {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 1.05rem;
}

.finance-card h3::before {
  content: "";
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  background: var(--gold);
  transform: rotate(45deg);
}

.finance-card p {
  margin-top: 0.5rem;
  color: var(--ink-soft);
}

.compliance {
  margin-top: 1rem;
  padding: clamp(1.35rem, 3vw, 1.75rem);
  background: var(--green-100);
  border-left: 4px solid var(--green-800);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.compliance h3 {
  font-size: 1.05rem;
}

.compliance p {
  margin-top: 0.5rem;
  color: var(--ink);
  max-width: 70ch;
}

/* ---------- 05 联系我们 ---------- */
.contact-panel {
  padding: clamp(1.35rem, 4vw, 2rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.contact-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  margin: 0;
}

.contact-list dt {
  padding-block: 0.85rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
  font-weight: 600;
}

.contact-list dd {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin: 0;
  padding-block: 0.85rem;
  border-bottom: 1px solid var(--line);
}

/* 未确认的联系方式统一使用占位标记，避免编造事实 */
.placeholder-badge {
  padding: 0.2rem 0.7rem;
  border: 1px dashed var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink-soft);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.contact-note {
  margin-top: 1.15rem;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

/* ---------- 页脚 ---------- */
.site-footer {
  padding-top: clamp(2.5rem, 6vw, 3.5rem);
  padding-bottom: 1.5rem;
  background: var(--green-950);
  color: #E9E4D6;
}

.footer-grid {
  display: grid;
  gap: 2rem;
}

.footer-brand-row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.footer-logo {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  border-radius: 50%;
  object-fit: cover;
}

.footer-org {
  color: var(--cream);
  font-family: var(--font-serif);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.footer-slogan {
  margin-top: 0.4rem;
  color: var(--gold-soft);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
}

.footer-heading {
  color: var(--gold-soft);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
}

.footer-nav ul {
  margin-top: 0.65rem;
}

.footer-nav a {
  display: inline-block;
  padding-block: 0.28rem;
  color: #E9E4D6;
  font-size: 0.9rem;
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--gold-soft);
  text-decoration: underline;
}

.beian-list {
  margin-top: 0.6rem;
  color: #C9C4B6;
  font-size: 0.82rem;
  line-height: 2;
}

.beian-list a {
  color: var(--gold-soft);
  text-decoration: none;
}

.beian-list a:hover {
  color: var(--cream);
  text-decoration: underline;
}

.footer-copyright {
  margin-top: 0.45rem;
  color: #C9C4B6;
  font-size: 0.8rem;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  margin-top: clamp(2rem, 5vw, 2.75rem);
  padding-top: 1.1rem;
  border-top: 1px solid rgba(233, 228, 214, 0.18);
  color: #A9A597;
  font-size: 0.78rem;
}

.back-top {
  color: var(--gold-soft);
  text-decoration: none;
}

.back-top:hover {
  color: var(--cream);
  text-decoration: underline;
}

/* ---------- 响应式：560px 起放宽卡片 ---------- */
@media (min-width: 560px) {
  .hero-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .milestones {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .milestone--members {
    grid-column: 1 / -1;
  }

  .council-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .finance-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 响应式：720px 起治理结构横向排列 ---------- */
@media (min-width: 720px) {
  .governance {
    grid-template-columns: 1fr auto 1fr;
    align-items: stretch;
    gap: 1rem;
  }

  .gov-arrow {
    align-self: center;
    transform: none;
  }

  .leaders {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .council-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: 1.4fr 0.8fr 1fr;
    align-items: start;
  }
}

/* ---------- 响应式：900px 起桌面布局 ---------- */
@media (min-width: 900px) {
  :root {
    --header-offset: 7.5rem;
  }

  .header-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .site-nav ul {
    padding-block: 0;
    border-top: 0;
  }

  .site-nav a {
    padding: 0.55rem 0.8rem;
    font-size: 0.92rem;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(260px, 0.85fr);
    align-items: center;
  }

  .hero-facts {
    max-width: 40rem;
  }

  .about-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.9fr);
    align-items: start;
    gap: clamp(2rem, 5vw, 4rem);
  }

  .business-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .milestones {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .milestone--members {
    grid-column: auto;
  }

  /* 桌面端为卡片增加轻量悬停反馈；触屏无影响 */
  .business-card,
  .finance-card,
  .leader {
    transition: border-color 0.2s ease, transform 0.2s ease;
  }

  .business-card:hover,
  .finance-card:hover,
  .leader:hover {
    border-color: var(--gold);
    transform: translateY(-2px);
  }
}

/* ---------- 减少动态效果偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}