/* ======================================================
   乐鱼体育 · Site Kit 共享样式
   文件：/assets/site.css
   关键词：深海蓝 / 活力橙 / 刊头导航 / 展览标签 / 低密度
   ====================================================== */

/* ---------- 1. Reset 与基础排版 ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--leyu-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--leyu-text);
  background-color: var(--leyu-bg);
  background-image:
    radial-gradient(1100px 480px at 88% -120px, rgba(255, 122, 0, .08) 0%, transparent 60%),
    radial-gradient(900px 420px at -120px 35%, rgba(29, 111, 143, .09) 0%, transparent 55%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video, canvas { max-width: 100%; display: block; height: auto; }
input, button, textarea, select { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
strong, b { font-weight: 700; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--leyu-title);
  font-weight: 900;
  line-height: 1.15;
  color: var(--leyu-text);
  text-wrap: balance;
}

/* ---------- 2. 设计变量 ---------- */
:root {
  --leyu-navy: #003B5C;
  --leyu-navy-light: #1D6F8F;
  --leyu-navy-dark: #002A44;
  --leyu-navy-darker: #001F33;
  --leyu-orange: #FF7A00;
  --leyu-orange-light: #FFA040;
  --leyu-bg: #F5F7FA;
  --leyu-surface: #FFFFFF;
  --leyu-text: #1A1A2E;
  --leyu-text-secondary: #5A6B7B;
  --leyu-border: #D4DCE4;
  --leyu-positive: #00A878;
  --leyu-warning: #FFC107;
  --leyu-title: Impact, "Arial Black", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --leyu-body: "Roboto", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  --leyu-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --leyu-radius: 14px;
  --leyu-radius-sm: 9px;
  --leyu-radius-lg: 22px;
  --leyu-container: 1280px;
  --leyu-shadow: 0 10px 30px rgba(0, 42, 68, .14);
  --leyu-shadow-sm: 0 4px 14px rgba(0, 42, 68, .08);
  --leyu-ease: cubic-bezier(.22, .61, .36, 1);
}

::selection { background: var(--leyu-orange); color: #fff; }
:focus-visible { outline: 3px solid var(--leyu-orange); outline-offset: 3px; border-radius: 6px; }

/* ---------- 3. 容器与工具类 ---------- */
.leyu-container {
  width: min(100% - 2rem, var(--leyu-container));
  margin-inline: auto;
}
.leyu-container--narrow { --leyu-container: 860px; }
.leyu-container--wide { --leyu-container: 1480px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.text-muted { color: var(--leyu-text-secondary); }
.text-navy { color: var(--leyu-navy); }
.mono { font-family: var(--leyu-mono); }
.hl { color: var(--leyu-orange); font-weight: 700; }
.stack { display: grid; gap: 1.5rem; }
.stack--lg { gap: 2.5rem; }

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 9999;
  display: inline-flex;
  align-items: center;
  padding: .8rem 1.5rem;
  background: var(--leyu-orange);
  color: #fff;
  font-weight: 700;
  font-size: .9375rem;
  border-radius: 0 0 12px 0;
  transform: translateY(-130%);
  transition: transform .3s var(--leyu-ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 5. 头部：刊头导航 ---------- */
.site-header {
  position: relative;
  z-index: 1000;
  color: #fff;
  background:
    repeating-linear-gradient(115deg, rgba(255,255,255,.03) 0 1px, transparent 1px 12px),
    linear-gradient(135deg, var(--leyu-navy-darker) 0%, var(--leyu-navy) 52%, var(--leyu-navy-light) 140%);
  border-bottom: 4px solid var(--leyu-orange);
  box-shadow: 0 6px 24px rgba(0, 42, 68, .22);
}

.masthead-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-family: var(--leyu-title);
  font-size: 1.875rem;
  line-height: 1;
  letter-spacing: .03em;
  color: #fff;
}
.brand-mark {
  display: block;
  width: 10px;
  height: 2.25rem;
  background: var(--leyu-orange);
  transform: skewX(-16deg);
  box-shadow: 5px 0 0 rgba(255,122,0,.32);
}
.brand-name { white-space: nowrap; }
.brand-tag {
  font-family: var(--leyu-mono);
  font-size: .7rem;
  line-height: 1;
  letter-spacing: .22em;
  color: rgba(255,255,255,.72);
  border: 1px solid rgba(255,255,255,.24);
  background: rgba(255,255,255,.08);
  border-radius: 999px;
  padding: .42em .85em .38em;
}

.masthead-actions {
  display: flex;
  align-items: center;
  gap: .8rem;
}

.season-badge {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .42rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.22);
  background: rgba(255,255,255,.09);
  color: rgba(255,255,255,.9);
  font-size: .875rem;
  font-weight: 500;
  letter-spacing: .02em;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.season-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--leyu-positive);
  animation: leyu-pulse 2.4s ease-out infinite;
}
.season-full { display: inline; }
.season-short { display: none; }

@keyframes leyu-pulse {
  0% { box-shadow: 0 0 0 0 rgba(0,168,120,.55); }
  70% { box-shadow: 0 0 0 8px rgba(0,168,120,0); }
  100% { box-shadow: 0 0 0 0 rgba(0,168,120,0); }
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,.25);
  background: rgba(255,255,255,.08);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: #fff;
  transition: transform .3s var(--leyu-ease), opacity .25s ease, background .25s ease;
}
.nav-toggle:hover,
.nav-toggle:focus-visible { background: rgba(255,255,255,.16); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); background: var(--leyu-orange-light); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); background: var(--leyu-orange-light); }

.masthead-nav {
  border-top: 1px solid rgba(255,255,255,.14);
  background: rgba(0,42,68,.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav-list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}
.nav-list a {
  position: relative;
  display: block;
  padding: .92rem 1.25rem;
  font-size: .95rem;
  font-weight: 500;
  letter-spacing: .05em;
  color: rgba(255,255,255,.78);
  transition: color .22s ease, background .22s ease;
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 1.1rem;
  right: 1.1rem;
  bottom: -1px;
  height: 3px;
  background: var(--leyu-orange);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .28s var(--leyu-ease);
}
.nav-list a:hover,
.nav-list a:focus-visible { color: #fff; }
.nav-list a:hover::after,
.nav-list a:focus-visible::after { transform: scaleX(1); }
.nav-list a[aria-current="page"] { color: #fff; }
.nav-list a[aria-current="page"]::after { transform: scaleX(1); }

/* ---------- 6. 页脚：展览标签式深蓝页脚 ---------- */
.site-footer {
  background: var(--leyu-navy-dark);
  color: rgba(255,255,255,.76);
  font-size: .9375rem;
  line-height: 1.7;
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.6fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  padding-block: clamp(2.5rem, 6vw, 4rem) 2.5rem;
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--leyu-title);
  font-size: 1.85rem;
  line-height: 1;
  color: #fff;
  letter-spacing: .03em;
  margin-bottom: .9rem;
}
.footer-brand-mark {
  width: 9px;
  height: 1.9rem;
  background: var(--leyu-orange);
  transform: skewX(-16deg);
  box-shadow: 4px 0 0 rgba(255,122,0,.3);
}
.footer-intro {
  max-width: 40ch;
  color: rgba(255,255,255,.68);
  margin-bottom: 1.2rem;
}
.footer-trust {
  max-width: 50ch;
  font-size: .85rem;
  line-height: 1.75;
  color: rgba(255,255,255,.56);
  border-left: 2px solid var(--leyu-orange);
  padding-left: .95rem;
}
.footer-trust-mark {
  display: block;
  font-family: var(--leyu-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--leyu-orange-light);
  text-transform: uppercase;
  margin-bottom: .25rem;
}

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

.footer-heading {
  position: relative;
  font-family: var(--leyu-body);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: rgba(255,255,255,.88);
  text-transform: uppercase;
  margin-bottom: 1rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid rgba(255,255,255,.14);
}
.footer-heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 32px;
  height: 2px;
  background: var(--leyu-orange);
}

.footer-links li { margin-bottom: .45rem; }
.footer-links a {
  color: rgba(255,255,255,.72);
  transition: color .2s ease, padding-left .2s ease;
}
.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--leyu-orange-light);
  padding-left: 4px;
}

.footer-contact { margin-bottom: 1rem; }
.footer-contact li {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: .5rem;
  color: rgba(255,255,255,.68);
}
.footer-contact-label {
  min-width: 2.6em;
  font-family: var(--leyu-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: rgba(255,255,255,.45);
  padding-top: .15em;
}
.footer-note {
  font-size: .8rem;
  line-height: 1.65;
  color: rgba(255,255,255,.5);
  border: 1px dashed rgba(255,255,255,.18);
  border-radius: 10px;
  padding: .65rem .8rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12);
  background: rgba(0,31,51,.5);
}
.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .5rem 1.5rem;
  padding-block: 1.1rem;
  font-size: .85rem;
  color: rgba(255,255,255,.58);
}
.footer-copy { margin: 0; }
.footer-icp { font-family: var(--leyu-mono); font-size: .8rem; letter-spacing: .04em; }
.footer-meta { display: inline-flex; align-items: center; gap: .6rem; }
.footer-meta a { color: rgba(255,255,255,.78); }
.footer-meta a:hover,
.footer-meta a:focus-visible { color: var(--leyu-orange-light); }
.footer-divider-dot { color: var(--leyu-orange); }

/* ---------- 7. 内页页眉与面包屑 ---------- */
.page-head {
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(1.5rem, 4vw, 2.5rem);
  border-bottom: 1px solid var(--leyu-border);
}
.page-title {
  font-size: clamp(2.1rem, 5.5vw, 3.6rem);
  line-height: 1.02;
  letter-spacing: .01em;
  color: var(--leyu-text);
}
.page-lead {
  max-width: 720px;
  margin-top: .75rem;
  font-size: 1.1rem;
  line-height: 1.75;
  color: var(--leyu-text-secondary);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  column-gap: .35rem;
  row-gap: .2rem;
  padding-block: 1.1rem;
  font-size: .875rem;
  color: var(--leyu-text-secondary);
}
.breadcrumb li + li::before {
  content: "/";
  margin-right: .35rem;
  color: var(--leyu-border);
  font-weight: 700;
}
.breadcrumb a { color: var(--leyu-navy); font-weight: 500; }
.breadcrumb a:hover { color: var(--leyu-orange); }
.breadcrumb [aria-current="page"] { color: var(--leyu-text-secondary); }

/* ---------- 8. 展区式段落节奏 ---------- */
.section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.section-head { max-width: 780px; margin-bottom: 1.75rem; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  margin-bottom: .6rem;
  font-family: var(--leyu-mono);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--leyu-navy);
}
.section-tag::before {
  content: "";
  width: 14px;
  height: 14px;
  flex: none;
  background: var(--leyu-orange);
  transform: skewX(-16deg);
}
.section-title {
  font-size: clamp(1.8rem, 3.6vw, 2.7rem);
  line-height: 1.08;
}
.section-subtitle {
  margin-top: .55rem;
  color: var(--leyu-text-secondary);
}

/* ---------- 9. 分屏与网格 ---------- */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}
.split--aside-right { grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); }
.split--aside-left { grid-template-columns: minmax(0, 1fr) minmax(0, 1.55fr); }

.grid { display: grid; gap: 1.5rem; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 10. 按钮与卡片 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .72rem 1.35rem;
  border-radius: var(--leyu-radius-sm);
  font-weight: 700;
  font-size: .95rem;
  line-height: 1.25;
  letter-spacing: .02em;
  transition: transform .22s ease, background .25s ease, color .25s ease, box-shadow .25s ease;
}
.btn-primary { background: var(--leyu-orange); color: #fff; box-shadow: 0 4px 14px rgba(255,122,0,.32); }
.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--leyu-orange-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,122,0,.4);
}
.btn-outline { border: 2px solid var(--leyu-navy); color: var(--leyu-navy); background: transparent; }
.btn-outline:hover,
.btn-outline:focus-visible { background: var(--leyu-navy); color: #fff; transform: translateY(-2px); }
.btn-ghost { background: rgba(0,59,92,.08); color: var(--leyu-navy); }
.btn-ghost:hover,
.btn-ghost:focus-visible { background: rgba(0,59,92,.15); transform: translateY(-2px); }
.btn-block { display: flex; width: 100%; }

.card {
  background: var(--leyu-surface);
  border: 1px solid var(--leyu-border);
  border-radius: var(--leyu-radius);
  padding: 1.6rem;
  box-shadow: var(--leyu-shadow-sm);
  transition: transform .3s var(--leyu-ease), box-shadow .3s var(--leyu-ease), border-color .3s ease;
}
.card--hover:hover,
.card--hover:focus-within {
  transform: translateY(-6px);
  box-shadow: var(--leyu-shadow);
  border-color: #c3d0db;
}
.card--navy { background: var(--leyu-navy); color: #fff; border-color: transparent; box-shadow: none; }
.card--accent-top { border-top: 4px solid var(--leyu-orange); }
.card-title { margin-bottom: .5rem; font-size: 1.35rem; line-height: 1.25; }
.card--navy .card-title { color: #fff; }
.card-text { color: var(--leyu-text-secondary); }
.card--navy .card-text { color: rgba(255,255,255,.72); }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  margin-top: .75rem;
  font-weight: 700;
  color: var(--leyu-navy);
}
.card-link::after { content: "→"; transition: margin-left .2s ease; }
.card-link:hover::after { margin-left: .3rem; }
.card--navy .card-link { color: var(--leyu-orange-light); }

/* ---------- 11. 玻璃层、标签、数据与表格 ---------- */
.glass {
  background: rgba(255,255,255,.72);
  border: 1px solid rgba(255,255,255,.85);
  border-radius: var(--leyu-radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--leyu-shadow-sm);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .3em .85em;
  border-radius: 999px;
  background: #E8EEF3;
  color: var(--leyu-text-secondary);
  font-size: .78rem;
  font-weight: 600;
  white-space: nowrap;
}
.tag--orange { background: rgba(255,122,0,.16); color: #b85500; }
.tag--navy { background: rgba(0,59,92,.12); color: var(--leyu-navy); }
.tag--green { background: rgba(0,168,120,.14); color: #007a58; }
.tag--warning { background: rgba(255,193,7,.2); color: #8a6a00; }

.stat { display: flex; flex-direction: column; }
.stat-label {
  font-family: var(--leyu-mono);
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--leyu-text-secondary);
}
.stat-value {
  margin-top: .15rem;
  font-family: var(--leyu-title);
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.05;
  color: var(--leyu-navy);
}
.stat--orange .stat-value { color: var(--leyu-orange); }
.stat--green .stat-value { color: var(--leyu-positive); }
.stat--light .stat-label { color: rgba(255,255,255,.55); }
.stat--light .stat-value { color: #fff; }

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--leyu-border);
  border-radius: var(--leyu-radius);
  background: var(--leyu-surface);
}
.table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: .9375rem;
}
.table th,
.table td {
  padding: .85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--leyu-border);
}
.table thead th {
  background: var(--leyu-navy);
  color: #fff;
  font-size: .84rem;
  font-weight: 600;
  letter-spacing: .04em;
}
.table tbody tr:last-child td { border-bottom: 0; }
.table tbody tr:hover { background: rgba(0, 59, 92, .045); }

/* ---------- 12. 正文容器与可展开组 ---------- */
.content { max-width: 78ch; }
.content p { margin-bottom: 1.15em; }
.content h2,
.content h3 { margin: 1.6em 0 .5em; }
.content ul { margin-bottom: 1.15em; }
.content ul li {
  position: relative;
  padding-left: 1.35em;
  margin-bottom: .45em;
}
.content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 9px;
  height: 9px;
  background: var(--leyu-orange);
  transform: skewX(-16deg);
}
.content a {
  color: var(--leyu-navy);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}
.content a:hover { color: var(--leyu-orange); }
.content blockquote {
  margin: 1.5em 0;
  padding: .75rem 0 .75rem 1.25rem;
  border-left: 4px solid var(--leyu-orange);
  background: rgba(255,122,0,.06);
  border-radius: 0 10px 10px 0;
  color: var(--leyu-text-secondary);
}

.details {
  border: 1px solid var(--leyu-border);
  border-radius: var(--leyu-radius);
  background: var(--leyu-surface);
  box-shadow: var(--leyu-shadow-sm);
}
.details + .details { margin-top: .8rem; }
.details summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  font-weight: 700;
}
.details summary::-webkit-details-marker { display: none; }
.details summary::after {
  content: "+";
  font-family: var(--leyu-mono);
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--leyu-orange);
  transition: transform .3s var(--leyu-ease);
}
.details[open] summary { border-bottom: 1px solid var(--leyu-border); }
.details[open] summary::after { transform: rotate(45deg); }
.details-body {
  padding: 1rem 1.25rem 1.25rem;
  color: var(--leyu-text-secondary);
}

/* ---------- 13. 图片占位容器 ---------- */
.image-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--leyu-radius);
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--leyu-navy-light) 0%, var(--leyu-navy) 70%);
}
.image-frame--wide { aspect-ratio: 21 / 9; }
.image-frame--portrait { aspect-ratio: 4 / 5; }
.image-frame--square { aspect-ratio: 1 / 1; }
.image-frame::before {
  content: attr(data-caption);
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  max-width: calc(100% - 2rem);
  padding: .35em .85em;
  border-radius: 999px;
  border-left: 3px solid var(--leyu-orange);
  background: rgba(0, 42, 68, .6);
  color: rgba(255,255,255,.9);
  font-family: var(--leyu-mono);
  font-size: .76rem;
  letter-spacing: .05em;
  opacity: 0;
  transition: opacity .25s ease;
}
.image-frame[data-caption]::before { opacity: 1; }

/* ---------- 14. 滚动显现 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .55s ease, transform .55s var(--leyu-ease);
  will-change: opacity, transform;
}
.js [data-reveal].is-revealed { opacity: 1; transform: none; }
.js [data-reveal][data-reveal-delay="1"] { transition-delay: .08s; }
.js [data-reveal][data-reveal-delay="2"] { transition-delay: .16s; }
.js [data-reveal][data-reveal-delay="3"] { transition-delay: .24s; }

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1020px) {
  .grid--3,
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-main { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .js .masthead-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    background: var(--leyu-navy-dark);
    border-top: 1px solid rgba(255,255,255,.12);
    box-shadow: 0 18px 32px rgba(0,0,0,.3);
  }
  .js .masthead-nav[data-open] { display: block; }
  .js .nav-toggle { display: inline-flex; }
  .nav-list {
    flex-direction: column;
  }
  .nav-list a {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid rgba(255,255,255,.08);
  }
  .nav-list a::after { display: none; }
  .nav-list a[aria-current="page"] { background: rgba(255,122,0,.14); }
  .split,
  .split--aside-right,
  .split--aside-left { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .leyu-container { width: min(100% - 1.25rem, var(--leyu-container)); }
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-bottom-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 560px) {
  .brand { font-size: 1.5rem; }
  .brand-tag { display: none; }
  .season-full { display: none; }
  .season-short { display: inline; }
  .season-badge {
    padding: .35rem .7rem;
    font-size: .82rem;
  }
  .masthead-top { padding-block: .8rem; }
}

/* ---------- 16. 减少动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}