/* =========================================================
   LD体育 · 共享样式 /assets/site.css
   设计语言：草原赛场电子记分牌 / 斜切面板 / 等宽数字
   ========================================================= */

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

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

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

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

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

button { font: inherit; color: inherit; }

table { width: 100%; border-collapse: collapse; }

:target { scroll-margin-top: 160px; }

/* ---------- 2. 设计变量 ---------- */
:root {
  --c-ink: #06182A;
  --c-ink-2: #0E2C42;
  --c-teal: #12BFA2;
  --c-orange: #FF6A2B;
  --c-lime: #C8F14A;
  --c-indigo: #3B2F72;
  --c-wine: #6E2036;
  --c-mist: #F3F7F6;
  --c-graphite: #9FB0B8;
  --c-pine: #0A5B4C;

  --line: rgba(159, 176, 184, 0.26);
  --line-strong: rgba(159, 176, 184, 0.48);
  --glass: rgba(14, 44, 66, 0.72);

  --font-display: "Noto Sans SC", "Source Han Sans SC", "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", "SFMono-Regular", ui-monospace, Menlo, Consolas, "Liberation Mono", monospace;

  --fs-label: 11px;
  --fs-xs: 12px;
  --fs-sm: 14px;
  --fs-body: 17px;
  --fs-md: 24px;
  --fs-lg: clamp(26px, 3.2vw, 40px);
  --fs-xl: clamp(34px, 6vw, 72px);

  --wrap: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --cut: 10px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --dur: 180ms;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background: var(--c-ink);
  color: var(--c-mist);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

h1 { font-size: var(--fs-xl); }
h2 { font-size: var(--fs-lg); }
h3 { font-size: var(--fs-md); }
h4 { font-size: var(--fs-sm); letter-spacing: 0.02em; }

p { max-width: 68ch; }

a {
  color: var(--c-teal);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}
a:hover { color: var(--c-lime); }

strong, b { font-weight: 700; }

::selection {
  background: var(--c-lime);
  color: var(--c-ink);
}

/* 可访问焦点 */
:focus-visible {
  outline: 2px solid var(--c-lime);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 4. 工具类 ---------- */
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-label);
  letter-spacing: 0.18em;
  line-height: 1.4;
  color: var(--c-graphite);
  max-width: none;
}
.label::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  background: var(--c-lime);
}

.lead {
  font-size: clamp(16px, 1.5vw, 19px);
  color: rgba(243, 247, 246, 0.84);
  max-width: 62ch;
}

.hint {
  font-size: var(--fs-xs);
  color: var(--c-graphite);
  letter-spacing: 0.04em;
}

/* ---------- 5. 布局骨架 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: clamp(40px, 6vw, 88px);
}

.band {
  position: relative;
  padding-block: clamp(18px, 3vw, 28px);
  background: var(--c-ink-2);
  border-block: 1px solid var(--line);
}
.band--teal { background: var(--c-teal); color: var(--c-ink); border-color: transparent; }
.band--teal a { color: var(--c-ink); }
.band--indigo { background: var(--c-indigo); }
.band--wine { background: var(--c-wine); }

.grid {
  display: grid;
  gap: clamp(16px, 2.6vw, 32px);
  align-items: start;
}
.grid--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.grid--5-7 { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ---------- 6. 切角面板 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 3vw, 32px);
  background: var(--c-ink-2);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}
.panel--indigo { background: var(--c-indigo); }
.panel--wine { background: var(--c-wine); }
.panel--mist {
  background: var(--c-mist);
  color: var(--c-ink);
  border-color: transparent;
}
.panel--mist a { color: var(--c-pine); }

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--c-mist);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-1px); }

.btn--cta {
  background: var(--c-orange);
  color: var(--c-ink);
}
.btn--cta:hover {
  background: var(--c-lime);
  color: var(--c-ink);
}

.btn--ghost {
  border-color: var(--line-strong);
  color: var(--c-mist);
}
.btn--ghost:hover {
  border-color: var(--c-teal);
  color: var(--c-teal);
}

/* ---------- 8. 标签 / 筹码 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: var(--c-teal);
  background: rgba(18, 191, 162, 0.14);
  border: 1px solid rgba(18, 191, 162, 0.42);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
  color: var(--c-mist);
  background: transparent;
  border: 1px solid var(--line-strong);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.chip:hover { border-color: var(--c-teal); color: var(--c-teal); }
.chip[aria-pressed="true"] {
  background: var(--c-lime);
  border-color: var(--c-lime);
  color: var(--c-ink);
  font-weight: 700;
}

/* ---------- 9. 表格 ---------- */
.data-table {
  font-size: var(--fs-sm);
  border: 1px solid var(--line);
}
.data-table th,
.data-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.data-table thead th {
  background: rgba(14, 44, 66, 0.92);
  color: var(--c-graphite);
  font-size: var(--fs-label);
  font-weight: 400;
  letter-spacing: 0.18em;
}
.data-table tbody tr:nth-child(even) { background: rgba(14, 44, 66, 0.36); }
.data-table .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
  white-space: nowrap;
}

/* ---------- 10. 标签页与分段切换 ---------- */
.tabs { display: block; }

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 4px;
  background: var(--glass);
  border: 1px solid var(--line);
}

.tab {
  appearance: none;
  padding: 8px 16px;
  border: 0;
  background: transparent;
  color: var(--c-mist);
  font-size: var(--fs-sm);
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.tab:hover { background: rgba(18, 191, 162, 0.16); }
.tab[aria-selected="true"] {
  background: var(--c-teal);
  color: var(--c-ink);
  font-weight: 700;
}

.tab-panel { padding-top: clamp(16px, 2.4vw, 24px); }
.tab-panel[hidden] { display: none; }

/* ---------- 11. 影像容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(145deg, var(--c-ink-2), var(--c-indigo) 72%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}
.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(118deg, rgba(243, 247, 246, 0.07) 0 1px, transparent 1px 8px);
}
.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }

.media-caption {
  margin-top: 10px;
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  color: var(--c-graphite);
}

/* ---------- 12. 面包屑 ---------- */
.breadcrumb {
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  color: var(--c-graphite);
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li:not(:last-child)::after {
  content: "/";
  color: rgba(159, 176, 184, 0.5);
}
.breadcrumb a {
  color: var(--c-graphite);
  text-decoration: none;
}
.breadcrumb a:hover { color: var(--c-teal); }
.breadcrumb [aria-current="page"] { color: var(--c-mist); }

/* ---------- 13. 跳至主内容 ---------- */
.skip-link {
  position: absolute;
  top: 8px;
  left: var(--gutter);
  z-index: 200;
  padding: 10px 16px;
  background: var(--c-lime);
  color: var(--c-ink);
  font-size: var(--fs-sm);
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus { transform: translateY(0); color: var(--c-ink); }

/* =========================================================
   14. 头部 Header
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--c-ink);
  border-bottom: 1px solid var(--line);
}

/* 14.1 状态轨 */
.header-rail {
  overflow: hidden;
  max-height: 44px;
  background: linear-gradient(90deg, var(--c-indigo), var(--c-ink-2) 46%, var(--c-ink));
  border-bottom: 1px solid var(--line);
  transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.header-rail > .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 6px;
}
.rail-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  max-width: none;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.12em;
  color: var(--c-mist);
}
.rail-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  background: var(--c-lime);
  animation: railPulse 2.4s var(--ease) infinite;
}
@keyframes railPulse {
  0% { box-shadow: 0 0 0 0 rgba(200, 241, 74, 0.55); }
  70% { box-shadow: 0 0 0 8px rgba(200, 241, 74, 0); }
  100% { box-shadow: 0 0 0 0 rgba(200, 241, 74, 0); }
}
.rail-code {
  max-width: none;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.18em;
  color: var(--c-graphite);
  text-align: right;
  white-space: nowrap;
}
.site-header.is-compact .header-rail {
  max-height: 0;
  opacity: 0;
  border-bottom-color: transparent;
}

/* 14.2 主栏 */
.header-main-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 24px);
  min-height: 74px;
  padding-block: 10px;
}

/* 品牌字标 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
  color: var(--c-mist);
  text-decoration: none;
}
.brand:hover { color: var(--c-mist); }

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  background: var(--c-lime);
  color: var(--c-ink);
  font-family: var(--font-mono);
  font-size: var(--fs-body);
  font-weight: 700;
  letter-spacing: 0.02em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.brand-lockup {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.04em;
}
.brand-tag {
  font-size: var(--fs-label);
  letter-spacing: 0.18em;
  color: var(--c-graphite);
}
.brand-season {
  padding: 2px 6px;
  border: 1px solid rgba(18, 191, 162, 0.5);
  color: var(--c-teal);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.08em;
  white-space: nowrap;
}

/* 移动端栏目按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  background: rgba(14, 44, 66, 0.85);
  border: 1px solid var(--line-strong);
  color: var(--c-mist);
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--c-teal); color: var(--c-teal); }
.nav-toggle-bars {
  display: grid;
  gap: 4px;
  width: 18px;
}
.nav-toggle-bars i {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 主导航（桌面：分段控件） */
.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 20px);
}

.nav-list {
  display: flex;
  align-items: stretch;
  gap: 2px;
  padding: 3px;
  background: var(--glass);
  border: 1px solid var(--line);
}
.nav-item { display: flex; }

.nav-link {
  display: flex;
  align-items: center;
  padding: 7px 13px;
  color: var(--c-mist);
  font-size: var(--fs-sm);
  letter-spacing: 0.04em;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-link:hover {
  background: var(--c-ink-2);
  color: var(--c-teal);
}
.nav-link[aria-current="page"] {
  background: var(--c-teal);
  color: var(--c-ink);
  font-weight: 700;
  box-shadow: inset 0 -3px 0 var(--c-lime);
}

.nav-utility {
  display: flex;
  align-items: center;
  gap: 10px;
}
.lang-chip {
  padding: 4px 7px;
  border: 1px solid var(--line-strong);
  color: var(--c-graphite);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.18em;
  line-height: 1.4;
}

/* 14.3 赛季数据索引带 */
.header-index {
  background: var(--c-ink-2);
  border-top: 1px solid var(--line);
}
.index-track {
  display: flex;
  align-items: stretch;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--c-pine) transparent;
}
.index-track::-webkit-scrollbar { height: 4px; }
.index-track::-webkit-scrollbar-thumb { background: var(--c-pine); }

.index-item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  flex: 0 0 auto;
  padding: 9px 18px;
  border-right: 1px solid var(--line);
  scroll-snap-align: start;
  white-space: nowrap;
}
.index-item:first-child { padding-left: 0; }
.index-item:last-child { border-right: 0; }

.index-key {
  font-size: var(--fs-label);
  letter-spacing: 0.18em;
  color: var(--c-graphite);
}
.index-val {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-variant-numeric: tabular-nums;
  color: var(--c-lime);
}
.index-item:first-child .index-val { color: var(--c-teal); }

/* =========================================================
   15. 页脚 Footer
   ========================================================= */
.site-footer {
  position: relative;
  margin-top: clamp(32px, 5vw, 64px);
  background: var(--c-ink);
  border-top: 1px solid var(--line);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 220px;
  pointer-events: none;
  background:
    repeating-linear-gradient(102deg, rgba(10, 91, 76, 0.18) 0 2px, transparent 2px 22px),
    radial-gradient(120% 90% at 12% 100%, rgba(18, 191, 162, 0.16), transparent 62%);
}

.footer-stripe {
  height: 8px;
  background: repeating-linear-gradient(
    90deg,
    var(--c-teal) 0 44px,
    var(--c-orange) 44px 88px,
    var(--c-lime) 88px 132px,
    var(--c-indigo) 132px 220px,
    var(--c-wine) 220px 300px
  );
}

.footer-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: clamp(24px, 4vw, 56px);
  padding-block: clamp(40px, 6vw, 76px);
  align-items: start;
}

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

.footer-col--brand {
  padding-bottom: clamp(16px, 4vw, 56px);
}
.footer-col--support { margin-top: clamp(0px, 2vw, 28px); }
.footer-col--contact { margin-top: clamp(0px, 1vw, 12px); }

.footer-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: none;
}
.footer-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  background: transparent;
  border: 1px solid var(--c-teal);
  color: var(--c-teal);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 700;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}
.footer-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.04em;
}
.footer-tagline {
  margin-top: 14px;
  font-size: var(--fs-sm);
  letter-spacing: 0.08em;
  color: var(--c-graphite);
  max-width: 24ch;
}
.footer-icp {
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
  color: rgba(159, 176, 184, 0.8);
  max-width: none;
}

.footer-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: var(--fs-label);
  font-weight: 400;
  letter-spacing: 0.18em;
  color: var(--c-graphite);
}
.footer-heading::before {
  content: "";
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  background: var(--c-lime);
}

.footer-list {
  display: grid;
  gap: 10px;
}
.footer-link {
  display: inline-block;
  color: var(--c-mist);
  font-size: var(--fs-sm);
  text-decoration: none;
  letter-spacing: 0.02em;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-link:hover {
  color: var(--c-teal);
  border-bottom-color: var(--c-teal);
}

.footer-contact {
  display: grid;
  gap: 10px;
}
.contact-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 10px;
  max-width: none;
  font-size: var(--fs-sm);
  line-height: 1.6;
}
.contact-key {
  font-size: var(--fs-label);
  letter-spacing: 0.14em;
  color: var(--c-graphite);
  padding-top: 3px;
}
.contact-val {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--c-mist);
  word-break: break-word;
}
.contact-row:last-child .contact-val { font-family: var(--font-body); }

.footer-note {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--c-graphite);
  max-width: 40ch;
}

.footer-bars {
  position: relative;
  border-top: 1px solid var(--line);
  background: rgba(6, 24, 42, 0.72);
}
.footer-bars-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 16px;
}
.footer-copy {
  max-width: none;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
  color: var(--c-graphite);
}
.footer-meta {
  max-width: 52ch;
  font-size: var(--fs-xs);
  letter-spacing: 0.02em;
  color: rgba(159, 176, 184, 0.78);
}

/* =========================================================
   16. 显现动效
   ========================================================= */
[data-reveal] {
  transition: opacity 480ms var(--ease), transform 480ms var(--ease);
}
[data-reveal].is-pending {
  opacity: 0;
  transform: translateY(16px);
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* =========================================================
   17. 响应式
   ========================================================= */
@media (max-width: 1080px) {
  .brand-tag { display: none; }
  .nav-link { padding: 7px 10px; font-size: 13px; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-col--contact { grid-column: 1 / -1; margin-top: 8px; }
}

@media (max-width: 899px) {
  :root { --fs-body: 16px; }

  .nav-toggle { display: inline-flex; }

  .primary-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: var(--gutter);
    right: var(--gutter);
    z-index: 90;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    background: var(--c-ink-2);
    border: 1px solid var(--line-strong);
    box-shadow: 0 26px 48px rgba(0, 0, 0, 0.5);
    max-height: calc(100vh - 140px);
    overflow-y: auto;
  }
  .primary-nav[data-open] {
    display: flex;
    animation: navDrop 220ms var(--ease) both;
  }
  @keyframes navDrop {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    padding: 0;
    background: transparent;
    border: 0;
  }
  .nav-link {
    padding: 13px 10px;
    font-size: 15px;
    border-bottom: 1px solid var(--line);
  }
  .nav-link[aria-current="page"] {
    background: rgba(18, 191, 162, 0.16);
    color: var(--c-teal);
    box-shadow: inset 3px 0 0 var(--c-teal);
  }
  .nav-link[aria-current="page"]:hover { color: var(--c-mist); }

  .nav-utility {
    padding: 14px 10px 4px;
    justify-content: space-between;
  }

  .index-item { padding: 8px 14px; }

  .grid--7-5,
  .grid--5-7,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px 24px;
  }
  .footer-col--brand { grid-column: 1 / -1; padding-bottom: 0; }
  .footer-col--support { margin-top: 0; }
  .footer-col--contact { grid-column: 1 / -1; margin-top: 0; }

  .footer-bars-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  .brand-mark { width: 38px; height: 38px; font-size: var(--fs-sm); }
  .brand-name { font-size: 18px; }
  .brand-season { display: none; }
  .rail-code { display: none; }

  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .contact-row { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .contact-key { padding-top: 0; }

  .tab { flex: 1 1 auto; text-align: center; }
}

/* =========================================================
   18. 动效可访问性
   ========================================================= */
@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;
  }

  [data-reveal],
  [data-reveal].is-pending {
    opacity: 1 !important;
    transform: none !important;
  }

  .btn:hover { transform: none; }
}