/* ============================================================
   J9体育 · 站点共享样式 /assets/site.css
   深空蓝仪表盘 + 杂志报头 + 编号章节体系
   ============================================================ */

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 150px;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  color: var(--mist);
  background-color: var(--deep);
  background-image:
    radial-gradient(1100px 560px at 82% -10%, rgba(55, 242, 211, 0.13), transparent 62%),
    radial-gradient(880px 500px at 0% 6%, rgba(123, 97, 255, 0.10), transparent 64%);
  background-repeat: no-repeat;
}

h1, h2, h3, h4, p, figure, ul, ol, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { max-width: 100%; display: block; }
a { color: inherit; }
button { font: inherit; color: inherit; }

::selection {
  background: var(--aqua);
  color: #04121f;
}

:focus-visible {
  outline: 2px solid var(--aqua);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 变量 ---------- */
:root {
  --deep: #061424;
  --hull: #0B2038;
  --grid-line: #1E3A57;
  --mist: #E8F4FF;
  --aqua: #37F2D3;
  --track: #FF6B35;
  --signal: #FFD447;
  --violet: #7B61FF;
  --ok: #4ADE80;
  --muted: #8FA9C0;

  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --shell: 1180px;
  --pad: clamp(18px, 4vw, 56px);
  --r-sm: 10px;
  --r-md: 18px;
  --r-lg: 28px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 0.2s;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 120;
  transform: translate(-50%, -130%);
  padding: 0.65em 1.4em;
  background: var(--aqua);
  color: #04121f;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-radius: 0 0 var(--r-sm) var(--r-sm);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translate(-50%, 0); }

/* ---------- 通用容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.main-content {
  flex: 1 0 auto;
  display: block;
}

.section { padding-block: clamp(36px, 5.5vw, 78px); }
.section--line { border-top: 1px solid rgba(30, 58, 87, 0.75); }

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 30px);
}
.c-4 { grid-column: span 4; }
.c-5 { grid-column: span 5; }
.c-6 { grid-column: span 6; }
.c-7 { grid-column: span 7; }
.c-8 { grid-column: span 8; }
.c-12 { grid-column: span 12; }

/* ---------- 排版工具 ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--aqua);
}

.chapter-no {
  display: block;
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: clamp(46px, 7.5vw, 120px);
  line-height: 0.82;
  letter-spacing: -0.05em;
  color: var(--signal);
  opacity: 0.94;
  font-variant-numeric: tabular-nums;
}

.lede {
  max-width: 64ch;
  color: var(--muted);
  font-size: 16px;
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

/* ---------- 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55em;
  padding: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.crumbs a:hover {
  color: var(--aqua);
  border-bottom-color: rgba(55, 242, 211, 0.55);
}
.crumbs__sep { color: var(--grid-line); }

/* ---------- 页面头 ---------- */
.page-head {
  display: grid;
  gap: 14px;
  padding-block: clamp(32px, 5vw, 66px) clamp(20px, 3vw, 38px);
}
.page-head__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--aqua);
}
.page-head__title {
  font-size: clamp(32px, 5.6vw, 72px);
  font-weight: 300;
  line-height: 1.12;
  letter-spacing: -0.015em;
  max-width: 24ch;
}
.page-head__lede {
  max-width: 64ch;
  color: var(--muted);
  font-size: 16px;
}

/* ---------- 按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  overflow: hidden;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}
.btn::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -40%;
  width: 34%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transform: skewX(-18deg);
  opacity: 0;
  transition: opacity 0.2s var(--ease), left 0.45s var(--ease);
}
.btn:hover::after { opacity: 1; left: 120%; }
.btn:active { transform: translateY(1px); }

.btn--accent { background: var(--track); color: #1b0600; }
.btn--accent:hover { background: #ff8257; }

.btn--aqua { background: var(--aqua); color: #04121f; }
.btn--aqua:hover { background: #6bf7e0; }

.btn--ghost {
  background: rgba(30, 58, 87, 0.28);
  border-color: var(--grid-line);
  color: var(--mist);
}
.btn--ghost:hover {
  border-color: rgba(55, 242, 211, 0.55);
  color: var(--aqua);
}

.btn--sm { padding: 9px 16px; font-size: 13px; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--aqua);
  text-decoration: none;
}
.link-arrow::after {
  content: "→";
  transition: transform var(--dur) var(--ease);
}
.link-arrow:hover::after { transform: translateX(4px); }

/* ---------- 面板 / 展签 ---------- */
.panel {
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--grid-line);
  border-radius: var(--r-md);
  background: linear-gradient(165deg, rgba(11, 32, 56, 0.92), rgba(8, 24, 42, 0.86));
}

.exhibit {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 18px 20px 18px 24px;
  border: 1px solid var(--grid-line);
  border-radius: 4px var(--r-md) var(--r-md) 4px;
  background: rgba(11, 32, 56, 0.55);
  transition:
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}
.exhibit::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--aqua), rgba(55, 242, 211, 0.08));
}
.exhibit:hover {
  background: rgba(20, 48, 78, 0.78);
  border-color: rgba(55, 242, 211, 0.35);
  transform: translateY(-2px);
}
.exhibit__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.exhibit__title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.01em;
}
.exhibit__meta { font-size: 13px; color: var(--muted); }

/* ---------- 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--grid-line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(120% 90% at 18% 0%, rgba(55, 242, 211, 0.16), transparent 62%),
    radial-gradient(90% 70% at 92% 100%, rgba(255, 107, 53, 0.14), transparent 66%),
    linear-gradient(150deg, var(--hull), #08182a);
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--3x4 { aspect-ratio: 3 / 4; }

.media-frame__caption {
  position: absolute;
  left: 14px;
  bottom: 14px;
  right: 14px;
  padding: 6px 12px;
  border: 1px solid rgba(30, 58, 87, 0.9);
  border-radius: 999px;
  background: rgba(6, 20, 36, 0.75);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

/* ---------- 数据表 ---------- */
.data-table__scroll {
  overflow-x: auto;
  border: 1px solid var(--grid-line);
  border-radius: var(--r-md);
  background: rgba(8, 24, 42, 0.62);
  -webkit-overflow-scrolling: touch;
}
.data-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
}
.data-table caption {
  padding: 14px 16px 0;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(30, 58, 87, 0.7);
}
.data-table thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--aqua);
  background: rgba(30, 58, 87, 0.35);
}
.data-table tbody tr { transition: background-color 0.16s var(--ease); }
.data-table tbody tr:hover { background: rgba(55, 242, 211, 0.07); }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table td.num { text-align: right; }

/* ---------- 指标组件 ---------- */
.meter {
  height: 6px;
  border-radius: 999px;
  background: rgba(30, 58, 87, 0.85);
  overflow: hidden;
}
.meter__fill {
  display: block;
  height: 100%;
  width: var(--value, 0%);
  border-radius: inherit;
  background: linear-gradient(90deg, var(--aqua), var(--ok));
  transition: width 0.4s var(--ease);
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  padding: 4px 10px;
  border: 1px solid var(--grid-line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.pill--ok {
  color: var(--ok);
  border-color: rgba(74, 222, 128, 0.35);
  background: rgba(74, 222, 128, 0.08);
}
.pill--warn {
  color: var(--signal);
  border-color: rgba(255, 212, 71, 0.35);
  background: rgba(255, 212, 71, 0.08);
}
.pill--hot {
  color: var(--track);
  border-color: rgba(255, 107, 53, 0.4);
  background: rgba(255, 107, 53, 0.1);
}

.stat { display: grid; gap: 2px; }
.stat__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 44px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--mist);
}
.stat__label {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* ============================================================
   头部
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  border-bottom: 1px solid var(--grid-line);
  background: linear-gradient(180deg, rgba(6, 20, 36, 0.97), rgba(6, 20, 36, 0.9));
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.scroll-rail {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  z-index: 3;
  pointer-events: none;
  background: rgba(30, 58, 87, 0.55);
}
.scroll-rail__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--aqua), var(--signal) 55%, var(--track));
  transition: transform 0.12s linear;
}

/* 顶部信息带 */
.masthead-bar {
  border-bottom: 1px solid rgba(30, 58, 87, 0.7);
  background-image: linear-gradient(
    90deg,
    rgba(55, 242, 211, 0.09),
    rgba(6, 20, 36, 0) 40%,
    rgba(255, 107, 53, 0.08)
  );
}
.masthead-bar__grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px 18px;
  padding-block: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.masthead-bar__issue { color: var(--mist); }
.masthead-bar__note { color: rgba(143, 169, 192, 0.85); }
.masthead-bar__hours { color: rgba(143, 169, 192, 0.85); }

/* 报头 */
.masthead {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding-block: clamp(16px, 2.4vw, 26px);
}
.masthead__status {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  white-space: nowrap;
  color: var(--muted);
}
.dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.18);
}
.masthead__brand {
  justify-self: center;
  display: block;
  text-align: center;
  text-decoration: none;
  color: var(--mist);
}
.masthead__plate {
  display: inline-flex;
  align-items: baseline;
  gap: 0.14em;
  font-size: clamp(26px, 3.2vw, 38px);
  line-height: 1;
}
.masthead__num {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: -0.02em;
  transition: color var(--dur) var(--ease);
}
.masthead__cn {
  font-weight: 200;
  letter-spacing: 0.3em;
  transition: color var(--dur) var(--ease);
}
.masthead__brand:hover .masthead__num { color: var(--aqua); }
.masthead__brand:hover .masthead__cn { color: var(--aqua); }
.masthead__sub {
  display: block;
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}
.masthead__actions { justify-self: end; }

/* 导航 */
.masthead-nav {
  position: relative;
  border-top: 1px solid rgba(30, 58, 87, 0.85);
  background: linear-gradient(180deg, rgba(11, 32, 56, 0.32), rgba(6, 20, 36, 0));
}
.masthead-nav__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding-block: 4px;
}
.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 2px;
}
.nav-list__item { display: flex; }
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  padding: 13px 15px;
  border-radius: 8px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 6px;
  height: 1px;
  background: var(--aqua);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}
.nav-link:hover,
.nav-link:focus-visible { color: var(--aqua); }
.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link[aria-current="page"]::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--aqua); }
.nav-list__idx {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}
.nav-link:hover .nav-list__idx,
.nav-link[aria-current="page"] .nav-list__idx { color: var(--signal); }
.nav-link__label { white-space: nowrap; }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--grid-line);
  border-radius: 999px;
  background: rgba(30, 58, 87, 0.35);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--mist);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: rgba(55, 242, 211, 0.5); }
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: var(--aqua);
  transition: background-color var(--dur) var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--aqua);
  transition: transform var(--dur) var(--ease);
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }
.masthead-nav[data-open="true"] .nav-toggle__bars { background: transparent; }
.masthead-nav[data-open="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.masthead-nav[data-open="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  margin-top: clamp(40px, 6vw, 88px);
  border-top: 1px solid var(--grid-line);
  background: linear-gradient(180deg, rgba(11, 32, 56, 0.55), rgba(6, 20, 36, 1) 62%);
}

.footer-scale {
  height: 8px;
  border-bottom: 1px solid rgba(30, 58, 87, 0.6);
  background-image: repeating-linear-gradient(
    90deg,
    rgba(30, 58, 87, 0.95) 0 1px,
    transparent 1px 14px
  );
}

.footer-lead {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 32px;
  padding-block: clamp(28px, 4vw, 44px) clamp(20px, 3vw, 30px);
}
.footer-brand {
  display: grid;
  gap: 8px;
  text-decoration: none;
  color: var(--mist);
}
.footer-brand__mark {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: 0.06em;
}
.footer-brand__mark span {
  font-weight: 200;
  letter-spacing: 0.34em;
  color: var(--aqua);
}
.footer-brand__line {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.footer-lead__issue {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 4vw, 52px);
  padding-block: clamp(26px, 4vw, 44px);
  border-top: 1px solid rgba(30, 58, 87, 0.7);
}
.footer-col { min-width: 0; }
.footer-col__title {
  position: relative;
  margin-bottom: 16px;
  padding-top: 15px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}
.footer-col__title::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--aqua);
}
.footer-list li + li { margin-top: 10px; }
.footer-list a {
  position: relative;
  display: inline-block;
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
.footer-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: var(--aqua);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}
.footer-list a:hover { color: var(--mist); }
.footer-list a:hover::after { transform: scaleX(1); }

.footer-contact {
  display: grid;
  gap: 9px;
  font-size: 14px;
  color: var(--muted);
}
.copy-btn {
  justify-self: start;
  padding: 2px 0;
  border: 0;
  border-bottom: 1px dashed rgba(55, 242, 211, 0.5);
  background: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--aqua);
  text-align: left;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.copy-btn:hover { color: var(--signal); border-bottom-color: var(--signal); }
.copy-btn[data-copied="true"] {
  color: var(--ok);
  border-bottom-color: rgba(74, 222, 128, 0.6);
}
.footer-contact__line {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--muted);
}
.footer-contact__link {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  margin-top: 4px;
  font-size: 14px;
  color: var(--aqua);
  text-decoration: none;
}
.footer-contact__link::after {
  content: "→";
  transition: transform var(--dur) var(--ease);
}
.footer-contact__link:hover::after { transform: translateX(4px); }

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 18px 28px;
  border-top: 1px solid rgba(30, 58, 87, 0.7);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}
.footer-base__icp { color: rgba(143, 169, 192, 0.88); }
.footer-base__note { color: rgba(143, 169, 192, 0.78); }

/* ---------- 滚动显现（渐进增强） ---------- */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.js-reveal [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 900px) {
  .c-4, .c-5, .c-6, .c-7, .c-8 { grid-column: span 12; }
}

@media (max-width: 820px) {
  html { scroll-padding-top: 170px; }

  .masthead-bar__note,
  .masthead-bar__hours { display: none; }
  .masthead-bar__grid { justify-content: center; }

  .masthead {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 14px;
    padding-block: 18px;
  }
  .masthead__status { display: none; }
  .masthead__actions { justify-self: center; }

  .masthead-nav__inner {
    justify-content: flex-end;
    padding-block: 10px;
  }
  .nav-toggle { display: inline-flex; }

  .nav-list {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 40;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: min(72vh, 520px);
    overflow-y: auto;
    padding: 8px;
    border: 1px solid var(--grid-line);
    border-top: 0;
    border-radius: 0 0 var(--r-md) var(--r-md);
    background: linear-gradient(180deg, #0B2038, #081a2e);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
  }
  .masthead-nav[data-open="true"] .nav-list { display: flex; }

  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 14px 16px;
    font-size: 15px;
    border-radius: 8px;
  }
  .nav-link::after { display: none; }
  .nav-link:hover,
  .nav-link:focus-visible { background: rgba(55, 242, 211, 0.08); }
  .nav-list__idx { font-size: 11px; }

  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-base { justify-content: flex-start; }
}

@media (max-width: 560px) {
  body { font-size: 15px; }
  .masthead__plate { font-size: 26px; }
  .masthead__cn { letter-spacing: 0.22em; }
  .page-head__title { letter-spacing: 0; }
  .footer-lead { flex-direction: column; align-items: flex-start; }
}

/* ---------- 动效偏好 ---------- */
@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;
  }
  .js-reveal [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .scroll-rail__bar { transition: none !important; }
}