/* =========================================================
   亚新体育入口 · 共享样式 /assets/site.css
   深墨蓝控制台 · 电光青状态 · 信号橙动作
   ========================================================= */

/* ---------- 1. 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, ul, ol { margin: 0; }

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

h1, h2, h3, h4 { font-weight: 700; line-height: 1.15; }

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

button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 色板 */
  --ink-950: #0B1220;
  --ink-850: #101B2E;
  --ink-700: #1E2E49;
  --cyan-400: #35E3DA;
  --cyan-150: #A6F2EE;
  --orange-500: #FF6A2B;
  --paper-100: #F4F1EA;
  --paper-300: #D8D2C4;
  --gray-400: #8A93A6;
  --white: #FFFFFF;

  /* 派生 */
  --text-soft: #C4CEE0;
  --paper-ink: #1B2436;
  --header-scrolled: rgba(11, 18, 32, 0.96);
  --cyan-wash: rgba(53, 227, 218, 0.08);
  --orange-wash: rgba(255, 106, 43, 0.10);

  /* 字体 */
  --font-display: "Inter Tight", "Archivo", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 尺度 */
  --header-h: 78px;
  --header-h-scrolled: 60px;
  --maxw: 1280px;
  --gutter: clamp(1.15rem, 4vw, 3.5rem);
  --radius: 2px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 中文排版基座 ---------- */
body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--ink-950);
  background-image:
    radial-gradient(1100px 620px at 82% -12%, rgba(53, 227, 218, 0.10), transparent 68%),
    radial-gradient(760px 480px at 4% 102%, rgba(30, 46, 73, 0.55), transparent 70%);
  background-repeat: no-repeat;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.8;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
  border-radius: 1px;
}

::selection {
  background: var(--cyan-400);
  color: var(--ink-950);
}

/* ---------- 4. 通用容器与栅格 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(2.75rem, 6.5vw, 5.5rem);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.25rem;
  padding-bottom: 0.85rem;
  margin-bottom: clamp(1.25rem, 3vw, 2.25rem);
  border-bottom: 1px solid var(--ink-700);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.375rem, 2.4vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.section-note {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(0.9rem, 2vw, 1.75rem);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.25rem);
}

@media (min-width: 920px) {
  .split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
}

.rule {
  height: 1px;
  border: 0;
  margin-block: clamp(1.5rem, 3vw, 2.5rem);
  background: linear-gradient(90deg, var(--cyan-400) 0 56px, var(--ink-700) 56px 100%);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 5. 跳至主要内容 ---------- */
.skip-link {
  position: fixed;
  top: -120px;
  left: 1rem;
  z-index: 400;
  padding: 0.75rem 1.15rem;
  background: var(--cyan-400);
  color: var(--ink-950);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: var(--radius);
  transition: top 0.2s var(--ease);
}

.skip-link:focus {
  top: 0.85rem;
}

/* ---------- 6. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: linear-gradient(180deg, rgba(11, 18, 32, 0.82) 0%, rgba(11, 18, 32, 0.42) 72%, rgba(11, 18, 32, 0) 100%);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: background-color 0.24s var(--ease), border-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.site-header[data-scrolled] {
  background: var(--header-scrolled);
  border-bottom-color: var(--ink-700);
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.42);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.75rem);
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: var(--header-h);
  transition: min-height 0.24s var(--ease);
}

.site-header[data-scrolled] .header-inner {
  min-height: var(--header-h-scrolled);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: 0 0 auto;
}

.brand-mark {
  position: relative;
  display: block;
  width: 28px;
  height: 28px;
  flex: none;
  background: var(--ink-850);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: 5px;
  background: var(--cyan-400);
  clip-path: polygon(0 100%, 44% 0, 100% 0, 100% 34%, 62% 100%);
}

.brand-mark::after {
  content: "";
  position: absolute;
  right: 4px;
  bottom: 4px;
  width: 4px;
  height: 4px;
  background: var(--orange-500);
}

.brand-mark--footer {
  width: 32px;
  height: 32px;
  margin-bottom: 0.85rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  line-height: 1.12;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--white);
}

.brand-line {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
}

/* 主导航 */
.primary-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(0.85rem, 1.9vw, 1.75rem);
  max-width: var(--maxw);
  margin-inline: auto;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.45rem 0.05rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: #C9D4E4;
  white-space: nowrap;
  transition: color 0.2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--cyan-400);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible { color: var(--white); }

.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  color: var(--cyan-400);
  font-weight: 600;
}

.nav-link[aria-current="page"]::after { transform: scaleX(1); }

/* 右侧动作区 */
.header-actions {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
}

/* 状态胶囊 */
.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.36rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  line-height: 1.4;
  text-transform: uppercase;
  color: var(--cyan-150);
  white-space: nowrap;
  background: rgba(16, 27, 46, 0.72);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
}

.status-chip--footer {
  margin-top: 1.1rem;
  background: rgba(16, 27, 46, 0.9);
}

.status-dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: var(--cyan-400);
  animation: dot-pulse 2.4s ease-in-out infinite;
}

@keyframes dot-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(53, 227, 218, 0.6); }
  50% { box-shadow: 0 0 0 5px rgba(53, 227, 218, 0); }
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--white);
  background: rgba(16, 27, 46, 0.78);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--cyan-400);
  color: var(--cyan-400);
}

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 12px;
}

.nav-toggle-bars span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 0.22s var(--ease);
}

.nav-toggle-bars span:nth-child(1) { top: 1px; }
.nav-toggle-bars span:nth-child(2) { bottom: 1px; }

.site-header[data-open] .nav-toggle-bars span:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.site-header[data-open] .nav-toggle-bars span:nth-child(2) {
  transform: translateY(-4px) rotate(-45deg);
}

/* 阅读进度 */
.header-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  pointer-events: none;
  background: linear-gradient(90deg, var(--cyan-400) 0%, var(--cyan-150) 60%, var(--orange-500) 100%);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.12s linear;
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.01em;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.btn--primary {
  background: var(--orange-500);
  border-color: var(--orange-500);
  color: #140B05;
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: #FF8A57;
  border-color: #FF8A57;
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  border-color: var(--ink-700);
  color: var(--cyan-150);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--cyan-400);
  color: var(--cyan-400);
}

.btn--sm {
  padding: 0.6rem 1rem;
  font-size: 0.8125rem;
}

.btn--block { width: 100%; }

/* ---------- 8. 文本与标签 ---------- */
.mono-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--cyan-400);
}

.display-num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(3.75rem, 13vw, 9.5rem);
  font-weight: 800;
  line-height: 0.82;
  letter-spacing: -0.04em;
  color: var(--white);
}

.lead {
  max-width: 34em;
  font-size: clamp(1.0625rem, 1.6vw, 1.25rem);
  line-height: 1.72;
  color: #C7D2E2;
}

.prose {
  max-width: 38em;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: #D3DCEA;
}

.prose p + p { margin-top: 1.05em; }

.prose--on-paper { color: var(--paper-ink); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.24rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.09em;
  line-height: 1.5;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--cyan-150);
  background: var(--cyan-wash);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
}

.tag--signal {
  color: var(--orange-500);
  background: var(--orange-wash);
  border-color: rgba(255, 106, 43, 0.42);
}

/* ---------- 9. 面板与卡片 ---------- */
.panel {
  position: relative;
  padding: clamp(1.15rem, 3vw, 2rem);
  background: var(--ink-850);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
}

.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  padding-bottom: 0.85rem;
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan-400);
  border-bottom: 1px solid var(--ink-700);
}

.panel__body { color: #C9D4E4; }

.panel--paper {
  background: var(--paper-100);
  border-color: var(--paper-300);
  color: var(--paper-ink);
  box-shadow: 6px 6px 0 rgba(30, 46, 73, 0.55);
}

.panel--paper .panel__head {
  color: var(--ink-700);
  border-bottom-color: var(--paper-300);
}

.panel--paper .panel__body { color: var(--paper-ink); }

.paper-sheet {
  position: relative;
  padding: clamp(1.15rem, 3vw, 2rem);
  background: var(--paper-100);
  color: var(--paper-ink);
  border: 1px solid var(--paper-300);
  border-radius: var(--radius);
  box-shadow: 6px 6px 0 rgba(30, 46, 73, 0.5), 12px 12px 0 rgba(30, 46, 73, 0.26);
}

/* ---------- 10. 图片容器基础规则 ---------- */
.media {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background-color: var(--ink-850);
  background-image:
    repeating-linear-gradient(135deg, rgba(53, 227, 218, 0.07) 0 1px, transparent 1px 9px),
    radial-gradient(120% 90% at 18% 0%, rgba(53, 227, 218, 0.10), transparent 62%);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(11, 18, 32, 0.55);
}

.media > img,
.media > video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3  { aspect-ratio: 4 / 3; }
.media--1x1  { aspect-ratio: 1 / 1; }
.media--wide { aspect-ratio: 21 / 9; }

.media__caption {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  line-height: 1.6;
  color: var(--gray-400);
}

/* ---------- 11. 面包屑 ---------- */
.breadcrumb { margin-bottom: clamp(1.25rem, 3vw, 2.25rem); }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--gray-400);
}

.breadcrumb__item { display: inline-flex; align-items: center; gap: 0.5rem; }

.breadcrumb__item a {
  transition: color 0.2s var(--ease);
}

.breadcrumb__item a:hover,
.breadcrumb__item a:focus-visible { color: var(--cyan-400); }

.breadcrumb__sep {
  width: 10px;
  height: 1px;
  background: rgba(255, 255, 255, 0.24);
}

.breadcrumb__current {
  color: var(--cyan-400);
}

/* ---------- 12. 装饰标记 ---------- */
.register-mark {
  position: relative;
  display: block;
  width: 20px;
  height: 20px;
  flex: none;
}

.register-mark::before,
.register-mark::after {
  content: "";
  position: absolute;
  background: var(--cyan-400);
}

.register-mark::before {
  top: 0;
  left: 50%;
  width: 1px;
  height: 100%;
  transform: translateX(-50%);
}

.register-mark::after {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  transform: translateY(-50%);
}

/* ---------- 13. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  padding-block: clamp(2.5rem, 6vw, 4rem) clamp(1.5rem, 3vw, 2.5rem);
  background: var(--ink-950);
  border-top: 1px solid var(--ink-700);
  color: var(--gray-400);
  font-size: 0.875rem;
  line-height: 1.75;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan-400) 0 22%, var(--ink-700) 22% 100%);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
}

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1000px) {
  .footer-grid { grid-template-columns: minmax(0, 1.7fr) repeat(3, minmax(0, 1fr)); }
}

.footer-identity { min-width: 0; }

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--white);
}

.footer-id {
  margin-top: 0.4rem;
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--gray-400);
}

.footer-col-title {
  margin-bottom: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-list a {
  font-size: 0.875rem;
  color: var(--text-soft);
  transition: color 0.2s var(--ease);
}

.footer-list a:hover,
.footer-list a:focus-visible { color: var(--cyan-400); }

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 2.25rem;
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  padding-top: clamp(1.15rem, 3vw, 1.75rem);
  border-top: 1px solid var(--ink-700);
}

.footer-contact-item {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  font-size: 0.8125rem;
  color: var(--text-soft);
  word-break: break-word;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem 1.5rem;
  margin-top: clamp(1.25rem, 3vw, 2rem);
  padding-top: 1rem;
  border-top: 1px solid var(--ink-700);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  color: var(--gray-400);
}

.footer-legal a {
  border-bottom: 1px solid var(--ink-700);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.footer-legal a:hover,
.footer-legal a:focus-visible {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

.footer-note { color: var(--gray-400); }

/* ---------- 14. 入场动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 15. 响应式：平板 ---------- */
@media (max-width: 1080px) {
  .brand-line { display: none; }
  .status-chip { font-size: 0.625rem; }
}

@media (max-width: 979px) {
  .nav-toggle { display: inline-flex; }

  .primary-nav {
    position: absolute;
    inset: 100% 0 auto 0;
    display: block;
    padding: 0 var(--gutter) 1.25rem;
    background: var(--ink-850);
    border-block: 1px solid var(--ink-700);
    box-shadow: 0 26px 52px rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 0.22s var(--ease), transform 0.22s var(--ease), visibility 0.22s;
  }

  .site-header[data-open] .primary-nav {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-width: var(--maxw);
    margin-inline: auto;
  }

  .nav-item + .nav-item { border-top: 1px solid var(--ink-700); }

  .nav-link {
    display: block;
    padding: 0.95rem 0;
    font-size: 1rem;
    color: var(--text-soft);
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] { color: var(--cyan-400); }

  .header-actions { margin-left: auto; }
}

/* ---------- 16. 响应式：手机 ---------- */
@media (max-width: 640px) {
  body { font-size: 1rem; line-height: 1.78; }

  .header-inner { gap: 0.6rem; }

  .status-chip { display: none; }

  .btn--sm { padding: 0.55rem 0.8rem; font-size: 0.75rem; }

  .nav-toggle-label { display: none; }

  .footer-contact { flex-direction: column; gap: 0.55rem; }

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

  .paper-sheet {
    box-shadow: 4px 4px 0 rgba(30, 46, 73, 0.5);
  }
}

/* ---------- 17. 降低动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .status-dot { animation: none; }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}