/* ==========================================================================
   乐鱼赛场 — 共享站点样式 /assets/site.css
   深海蓝底 · 荧光青强调 · 珊瑚橙赛后标记 · 暖灰赛季层级
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*, *::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 { margin: 0; }

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

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

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

a { color: inherit; }

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 品牌色 */
  --deep: #061826;
  --deep-2: #04121E;
  --night: #0C2540;
  --cyan: #2FE3D0;
  --cyan-soft: #B7F5EE;
  --cyan-deep: #0F7F74;
  --coral: #FF6A4D;
  --warmgray: #C7C0B4;
  --paper: #F5F8F7;
  --ink: #0B1118;
  --mist: #8FA9C0;

  /* 语义色 */
  --text: #CFDEE8;
  --text-dim: #8FA9C0;
  --line: rgba(143, 169, 192, 0.18);
  --line-strong: rgba(47, 227, 208, 0.32);

  /* 字体 */
  --font-display: "HarmonyOS Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "HarmonyOS Sans SC", system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 度量 */
  --gutter: clamp(18px, 4vw, 44px);
  --width: 1240px;
  --radius: 4px;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- 3. 中文排版基线 ---------- */
body {
  background-color: var(--deep);
  background-image:
    radial-gradient(120% 80% at 88% -10%, rgba(12, 37, 64, 0.9) 0%, transparent 60%),
    linear-gradient(180deg, #05131F 0%, var(--deep) 42%, #04101B 100%);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--paper);
  text-wrap: balance;
}

h1 { font-size: clamp(2.4rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.75rem, 3.6vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.2vw, 1.55rem); line-height: 1.3; }
h4 { font-size: 1.0625rem; line-height: 1.4; letter-spacing: 0; }

p { text-wrap: pretty; }

::selection { background: var(--cyan); color: #04121E; }

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

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan);
  color: #04121E;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  border-radius: 2px;
  transform: translateY(-260%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus { transform: translateY(0); }

/* ---------- 5. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(5, 18, 30, 0.94);
  border-bottom: 1px solid var(--line);
  transition: border-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.site-header[data-scrolled] {
  border-bottom-color: var(--line-strong);
  box-shadow: 0 14px 34px -22px rgba(0, 0, 0, 0.95);
}

/* 上层层：品牌 + 说明 + 工具位 */
.topbar { border-bottom: 1px solid rgba(143, 169, 192, 0.1); }

.topbar__inner {
  width: 100%;
  max-width: var(--width);
  margin-inline: auto;
  padding: 12px var(--gutter);
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 34px);
}

.topbar__lead {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
  flex: 1 1 auto;
}

.topbar__tagline {
  margin: 0;
  padding-left: 14px;
  border-left: 1px solid rgba(143, 169, 192, 0.25);
  font-size: 0.78rem;
  line-height: 1.55;
  letter-spacing: 0.01em;
  color: var(--mist);
  min-width: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--paper);
}

.brand__mark {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  background: linear-gradient(135deg, var(--cyan) 0 54%, var(--coral) 54% 100%);
  clip-path: polygon(0 0, 100% 0, 100% 58%, 58% 100%, 0 100%);
  transition: transform 0.24s var(--ease);
}

.brand:hover .brand__mark { transform: rotate(-7deg) scale(1.05); }

.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.06rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.topbar__utils {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  flex: 0 0 auto;
}

.util-link {
  position: relative;
  display: inline-block;
  padding: 0.42em 0.1em;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--cyan-soft);
  text-decoration: none;
  white-space: nowrap;
}

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

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

.util-link--accent {
  padding: 0.42em 0.85em;
  color: var(--coral);
  border: 1px solid rgba(255, 106, 77, 0.5);
  border-radius: 2px;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.util-link--accent::after { display: none; }

.util-link--accent:hover,
.util-link--accent:focus-visible {
  background: rgba(255, 106, 77, 0.14);
  border-color: var(--coral);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  background: rgba(12, 37, 64, 0.9);
  color: var(--cyan-soft);
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--cyan);
  background: rgba(47, 227, 208, 0.1);
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: top 0.18s var(--ease), transform 0.18s var(--ease);
}

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }

.nav-toggle__text {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* 下层层：主导航 */
.mainnav {
  width: 100%;
  background: linear-gradient(90deg, rgba(12, 37, 64, 0.55), transparent 70%);
}

.mainnav__list {
  width: 100%;
  max-width: var(--width);
  margin-inline: auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: stretch;
  gap: clamp(6px, 1.6vw, 26px);
  overflow-x: auto;
  scrollbar-width: none;
}

.mainnav__list::-webkit-scrollbar { display: none; }

.mainnav__item { display: block; flex: 0 0 auto; }

.mainnav__link {
  position: relative;
  display: block;
  padding: 13px 2px 15px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.01em;
  color: #A9BDCD;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s var(--ease);
}

.mainnav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}

.mainnav__link:hover { color: var(--paper); }
.mainnav__link:hover::after { transform: scaleX(1); }

.mainnav__link[aria-current="page"] { color: var(--cyan); }
.mainnav__link[aria-current="page"]::after { transform: scaleX(1); }

/* ---------- 6. 页脚 ---------- */
.site-footer {
  background: linear-gradient(180deg, #051420 0%, var(--deep-2) 55%, #030D16 100%);
  border-top: 1px solid var(--line-strong);
  color: var(--mist);
}

.site-footer__inner {
  width: 100%;
  max-width: var(--width);
  margin-inline: auto;
  padding: clamp(36px, 5.5vw, 72px) var(--gutter) clamp(26px, 3.5vw, 44px);
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.2fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.foot-brand {
  border-left: 2px solid var(--cyan);
  padding-left: clamp(14px, 2vw, 22px);
}

.foot-brand__title {
  margin-bottom: 0.35em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.foot-brand__sub {
  max-width: 30ch;
  font-size: 0.85rem;
  line-height: 1.85;
  color: var(--mist);
}

.foot-nav__list { display: grid; gap: 2px; }

.foot-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 0;
  font-size: 0.9rem;
  color: #A9BDCD;
  text-decoration: none;
  border-bottom: 1px dashed rgba(143, 169, 192, 0.18);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), padding-left 0.18s var(--ease);
}

.foot-nav__link:hover,
.foot-nav__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: rgba(47, 227, 208, 0.55);
  padding-left: 6px;
}

.foot-contact { display: grid; gap: 10px; align-content: start; }

.foot-contact__row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: baseline;
  font-size: 0.85rem;
  line-height: 1.7;
}

.foot-contact__key {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(143, 169, 192, 0.75);
  white-space: nowrap;
}

.foot-contact__val {
  color: var(--cyan-soft);
  overflow-wrap: anywhere;
}

.foot-contact__val--mono {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.01em;
}

.site-footer__base {
  border-top: 1px solid rgba(143, 169, 192, 0.12);
  background: rgba(3, 13, 22, 0.6);
}

.site-footer__base-inner {
  width: 100%;
  max-width: var(--width);
  margin-inline: auto;
  padding: 16px var(--gutter) 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.foot-note {
  font-size: 0.72rem;
  line-height: 1.8;
  color: rgba(143, 169, 192, 0.72);
}

.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-top: 12px;
  border-top: 1px solid rgba(143, 169, 192, 0.1);
}

.icp {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  color: var(--warmgray);
}

.foot-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
}

.foot-legal__link {
  font-size: 0.78rem;
  color: #A9BDCD;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.foot-legal__link:hover,
.foot-legal__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 7. 页面骨架 ---------- */
.container {
  width: 100%;
  max-width: var(--width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(28px, 4vw, 52px); }

.section--paper {
  background: var(--paper);
  color: #26333D;
}

.section--paper h2,
.section--paper h3,
.section--paper h4 { color: var(--ink); }

.section--paper .eyebrow { color: var(--cyan-deep); }
.section--paper .eyebrow::before { background: var(--cyan-deep); }
.section--paper .side-note { color: #56666F; border-left-color: var(--cyan-deep); }
.section--paper .stat { color: var(--ink); }
.section--paper .stat-label { color: #5C6C77; }
.section--paper .prose { color: #26333D; }
.section--paper .prose strong { color: var(--ink); }

.grid { display: grid; gap: clamp(20px, 3vw, 40px); }
.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--8-4 { grid-template-columns: 8fr 4fr; }
.grid--5-7 { grid-template-columns: 5fr 7fr; }
.grid--3-9 { grid-template-columns: 3fr 9fr; }
.grid--4-8 { grid-template-columns: 4fr 8fr; }

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--stack-gap, 18px);
}

.stack--sm { --stack-gap: 10px; }

/* ---------- 8. 通用组件 ---------- */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75em;
  margin-bottom: 0.9em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  flex: 0 0 auto;
  width: 26px;
  height: 1px;
  background: var(--cyan);
}

.breadcrumb { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.05em; }

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  color: var(--mist);
}

.breadcrumb li + li::before {
  content: "/";
  padding-inline: 0.6em;
  color: rgba(143, 169, 192, 0.45);
}

.breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

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

.breadcrumb [aria-current="page"] { color: var(--cyan-soft); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.72em 1.4em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.btn--primary {
  background: var(--coral);
  color: #1A0703;
}

.btn--primary:hover,
.btn--primary:focus-visible { background: #FF8A72; }

.btn--ghost {
  background: transparent;
  border-color: rgba(47, 227, 208, 0.45);
  color: var(--cyan);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: rgba(47, 227, 208, 0.12);
  border-color: var(--cyan);
}

.btn--quiet {
  background: rgba(12, 37, 64, 0.6);
  border-color: rgba(199, 192, 180, 0.28);
  color: var(--cyan-soft);
}

.btn--quiet:hover,
.btn--quiet:focus-visible {
  border-color: var(--warmgray);
  color: var(--paper);
}

.prose {
  max-width: 68ch;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: #C6D5E0;
}

.prose > * + * { margin-top: 1.1em; }
.prose h2 { margin-top: 2.1em; font-size: clamp(1.5rem, 2.6vw, 2rem); }
.prose h3 { margin-top: 1.7em; }
.prose ul,
.prose ol { padding-left: 1.25em; }
.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4em; }
.prose strong { color: var(--paper); font-weight: 700; }

.prose a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 208, 0.4);
  transition: border-color 0.18s var(--ease);
}

.prose a:hover { border-bottom-color: var(--cyan); }

.side-note {
  padding-left: 1em;
  border-left: 2px solid rgba(47, 227, 208, 0.4);
  font-size: 0.8125rem;
  line-height: 1.9;
  color: var(--mist);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.26em 0.62em;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid rgba(199, 192, 180, 0.35);
  border-radius: 999px;
  color: var(--warmgray);
  white-space: nowrap;
}

.tag--season {
  background: rgba(199, 192, 180, 0.1);
  color: var(--warmgray);
}

.tag--live {
  background: rgba(255, 106, 77, 0.1);
  border-color: rgba(255, 106, 77, 0.5);
  color: var(--coral);
}

.tag--index {
  background: rgba(47, 227, 208, 0.08);
  border-color: rgba(47, 227, 208, 0.45);
  color: var(--cyan);
}

.stat {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--paper);
}

.stat--end { text-align: right; }

.stat-label {
  display: block;
  margin-top: 0.5em;
  font-size: 0.75rem;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* 可复用图片容器 */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  isolation: isolate;
  border-radius: var(--radius) var(--radius) 20px var(--radius);
  background-color: var(--night);
  background-image:
    linear-gradient(118deg, rgba(47, 227, 208, 0.12), transparent 58%),
    repeating-linear-gradient(90deg, rgba(143, 169, 192, 0.12) 0 1px, transparent 1px 46px);
  box-shadow: inset 0 0 0 1px rgba(47, 227, 208, 0.14);
}

.media-frame > img,
.media-frame > picture > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--band { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--cyan-soft);
  background: linear-gradient(transparent, rgba(6, 24, 38, 0.9));
}

.visually-hidden {
  position: absolute;
  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;
}

/* ---------- 9. 阅读进度（由 site.js 注入） ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 90;
  background: rgba(47, 227, 208, 0.08);
  pointer-events: none;
}

.scroll-progress__fill {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan) 58%, var(--coral) 100%);
  will-change: transform;
}

/* ---------- 10. 响应式 ---------- */
@media (max-width: 1100px) {
  .site-footer__inner { grid-template-columns: 1.2fr 1fr; }
  .foot-contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .grid--7-5,
  .grid--8-4,
  .grid--5-7,
  .grid--3-9,
  .grid--4-8 { grid-template-columns: 1fr; }

  .topbar__tagline { font-size: 0.75rem; }
}

@media (max-width: 880px) {
  .topbar__inner {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "lead toggle"
      "utils utils";
    align-items: center;
    gap: 10px 12px;
    padding-block: 11px;
  }

  .topbar__lead {
    grid-area: lead;
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
  }

  .topbar__tagline {
    padding-left: 0;
    border-left: 0;
    font-size: 0.72rem;
    line-height: 1.5;
  }

  .topbar__utils {
    grid-area: utils;
    margin-left: 0;
    flex-wrap: wrap;
    gap: 8px 14px;
  }

  .nav-toggle {
    grid-area: toggle;
    display: inline-flex;
    justify-self: end;
    margin-left: 0;
  }

  .mainnav {
    display: none;
    border-top: 1px solid rgba(143, 169, 192, 0.14);
    background: rgba(4, 18, 30, 0.98);
  }

  .mainnav[data-open] {
    display: block;
    animation: navIn 0.18s var(--ease) both;
  }

  .mainnav__list {
    flex-direction: column;
    gap: 0;
    padding-block: 6px 12px;
    overflow: visible;
  }

  .mainnav__item + .mainnav__item { border-top: 1px solid rgba(143, 169, 192, 0.1); }

  .mainnav__link {
    padding: 13px 2px;
    font-size: 0.95rem;
  }

  .mainnav__link::after { display: none; }

  .mainnav__link[aria-current="page"]::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    margin-right: 10px;
    vertical-align: middle;
    background: var(--cyan);
    border-radius: 1px;
  }

  .site-footer__inner { grid-template-columns: 1fr; gap: 30px; }

  .site-footer__meta { justify-content: flex-start; }
}

@keyframes navIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 520px) {
  body { font-size: 15.5px; }

  .foot-contact__row { grid-template-columns: 1fr; gap: 2px; }

  .btn { width: 100%; }
}

/* ---------- 11. 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;
    scroll-behavior: auto !important;
  }

  .mainnav[data-open] { animation: none; }
}