/* ===== /assets/site.css —— 88体育官网共享样式 ===== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 140px;
}

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

ul, ol { padding: 0; }

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

button, input, select, textarea { font: inherit; color: inherit; }

a { color: inherit; }

/* 变量 */
:root {
  --deep: #0A1F2E;
  --night: #0F2A3D;
  --card: #14384F;
  --sunset: #F4813C;
  --neon: #C6F24E;
  --ice: #E8EEF2;
  --mist: #9FB6C4;
  --ridge: #2E5C78;
  --dusk: #1B3B55;
  --sand: #FFD9B8;
  --ink: #08161F;

  --font-display: "Oswald", "Barlow Condensed", "PingFang SC", "Noto Sans SC", sans-serif;
  --font-body: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, monospace;

  --line: 2px solid var(--ridge);
  --shadow-hard: 8px 8px 0 rgba(4, 15, 23, 0.55);
  --shadow-hard-lg: 12px 12px 0 rgba(4, 15, 23, 0.6);
  --gap: clamp(16px, 2.4vw, 32px);
  --pad-section: clamp(48px, 8vw, 112px);
  --radius: 0;
}

/* 中文排版基础 */
body {
  position: relative;
  min-height: 100vh;
  background-color: var(--deep);
  color: var(--ice);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  font-weight: 400;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(1100px 520px at 82% -6%, rgba(244, 129, 60, 0.12), transparent 62%),
    radial-gradient(900px 620px at -8% 12%, rgba(46, 92, 120, 0.28), transparent 66%);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: 0.04em;
  color: var(--ice);
}

h1 { font-size: clamp(2.1rem, 5vw, 4rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.5rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.55rem); }
h4 { font-size: 1rem; letter-spacing: 0.08em; }

p { font-size: 1rem; color: var(--ice); }
p + p { margin-top: 0.9em; }

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

:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

/* 布局容器与网格 */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 40px);
  position: relative;
  z-index: 1;
}

.grid {
  display: grid;
  gap: var(--gap);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.grid--split { grid-template-columns: minmax(220px, 3fr) minmax(0, 9fr); }

.stack {
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 2vw, 28px);
}

.prose { max-width: 42em; }
.prose p { color: var(--ice); }
.prose a { color: var(--sunset); }

.section { padding: var(--pad-section) 0; }
.section + .section { border-top: 1px solid rgba(46, 92, 120, 0.55); }

.section-head { margin-bottom: clamp(20px, 3vw, 40px); }

.section-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--sunset);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-index::after {
  content: "";
  display: block;
  width: 42px;
  height: 2px;
  margin-top: 8px;
  background: var(--sunset);
}

.section-lede {
  max-width: 40em;
  margin-top: 12px;
  color: var(--mist);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--neon);
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 2px solid var(--ridge);
  border-radius: var(--radius);
  background: transparent;
  color: var(--ice);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease, border-color 120ms ease, box-shadow 120ms ease, transform 120ms ease;
}

.btn:hover {
  border-color: var(--neon);
  color: var(--neon);
  transform: translateY(-2px);
  box-shadow: 6px 6px 0 rgba(4, 15, 23, 0.5);
}

.btn-primary {
  background: var(--sunset);
  border-color: var(--sunset);
  color: var(--ink);
  box-shadow: 6px 6px 0 rgba(4, 15, 23, 0.5);
}

.btn-primary:hover {
  background: var(--sand);
  border-color: var(--neon);
  color: var(--ink);
  box-shadow: 8px 8px 0 rgba(4, 15, 23, 0.55);
}

.btn-ghost { background: transparent; }
.btn--sm { padding: 8px 14px; font-size: 13px; }
.btn--block { width: 100%; }

/* 面包屑 */
.breadcrumbs { padding: 18px 0 0; }

.breadcrumb-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.breadcrumb-item { display: flex; align-items: center; gap: 8px; }

.breadcrumb-item:not(:last-child)::after {
  content: "/";
  color: var(--ridge);
}

.breadcrumb-link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 120ms ease, border-color 120ms ease;
}

.breadcrumb-link:hover { color: var(--neon); border-bottom-color: var(--neon); }
.breadcrumb-current { color: var(--ice); }

/* ===================== 头部 ===================== */
.skip-link {
  position: fixed;
  top: -90px;
  left: 16px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--neon);
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  border: 2px solid var(--ink);
  transition: top 120ms ease;
}

.skip-link:focus { top: 10px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, #081A26 0%, var(--deep) 62%, #0C2434 100%);
  border-bottom: var(--line);
}

.header-strip {
  background: rgba(15, 42, 61, 0.72);
  border-bottom: 1px solid rgba(46, 92, 120, 0.7);
}

.header-strip-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 32px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.strip-label { color: var(--neon); white-space: nowrap; }

.strip-scale { display: flex; gap: 6px; flex: 1 1 auto; min-width: 40px; }

.strip-scale i {
  flex: 1 1 auto;
  height: 2px;
  background: linear-gradient(90deg, var(--ridge), rgba(46, 92, 120, 0.08));
}

.strip-scale i:nth-child(3) { background: linear-gradient(90deg, var(--sunset), rgba(244, 129, 60, 0.1)); }

.strip-state { color: var(--sunset); white-space: nowrap; }

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: 74px;
  padding-top: 10px;
  padding-bottom: 10px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
  text-decoration: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  background: var(--sunset);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: 4px 4px 0 rgba(4, 15, 23, 0.55);
}

.brand-text { display: flex; flex-direction: column; }

.brand-name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ice);
  line-height: 1.2;
}

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  background: rgba(20, 56, 79, 0.7);
  border: 2px solid var(--ridge);
  color: var(--ice);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: border-color 120ms ease, color 120ms ease;
}

.nav-toggle:hover { border-color: var(--neon); color: var(--neon); }

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 18px;
  height: 13px;
}

.nav-toggle-bars i {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 120ms ease, opacity 120ms ease;
}

.site-header[data-open] .nav-toggle-bars i:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bars i:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle-bars i:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.8vw, 26px);
}

.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.4vw, 22px);
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 2px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 120ms ease, border-color 120ms ease;
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--ridge);
  transition: color 120ms ease;
}

.nav-link:hover { color: var(--ice); border-bottom-color: var(--ridge); }
.nav-link:hover .nav-index { color: var(--sunset); }

.nav-link[aria-current="page"] {
  color: var(--ice);
  border-bottom-color: var(--sunset);
}

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

.header-utility {
  display: flex;
  align-items: center;
  padding-left: clamp(10px, 1.4vw, 20px);
  border-left: 1px solid rgba(46, 92, 120, 0.7);
}

.utility-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
}

.utility-link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px dotted var(--ridge);
  transition: color 120ms ease, border-color 120ms ease;
}

.utility-link:hover { color: var(--neon); border-bottom-color: var(--neon); }

.header-cta { flex: 0 0 auto; padding: 10px 16px; font-size: 14px; }

.scroll-progress {
  height: 3px;
  background: rgba(46, 92, 120, 0.45);
}

.scroll-progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--sunset), var(--neon));
}

/* 回到顶部 */
.to-top {
  position: fixed;
  right: clamp(14px, 3vw, 32px);
  bottom: clamp(14px, 3vw, 32px);
  z-index: 70;
  padding: 10px 14px;
  background: var(--card);
  border: 2px solid var(--ridge);
  color: var(--ice);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(6px);
  transition: opacity 140ms ease, transform 140ms ease, visibility 140ms ease, border-color 140ms ease, color 140ms ease;
}

.to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: none;
}

.to-top:hover { border-color: var(--neon); color: var(--neon); }

/* ===================== 页脚 ===================== */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(56px, 9vw, 128px);
  background: var(--night);
  border-top: var(--line);
  color: var(--mist);
}

.footer-rule {
  height: 12px;
  border-bottom: 1px solid var(--ridge);
  background: repeating-linear-gradient(90deg, var(--ridge) 0 2px, transparent 2px 14px);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(240px, 1.3fr) minmax(0, 1.9fr) minmax(220px, 1.1fr);
  gap: clamp(24px, 4vw, 64px);
  padding: clamp(36px, 6vw, 72px) clamp(16px, 4vw, 40px) 34px;
}

.footer-brand { max-width: 34em; }

.footer-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  background: var(--sunset);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  box-shadow: 4px 4px 0 rgba(4, 15, 23, 0.5);
}

.footer-brand-name {
  margin-top: 14px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ice);
  line-height: 1.3;
}

.footer-tagline {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--neon);
}

.footer-note {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(120px, 1fr));
  gap: clamp(16px, 2.4vw, 36px);
}

.footer-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--ice);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.footer-heading::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 2px;
  background: var(--sunset);
}

.footer-links { list-style: none; display: flex; flex-direction: column; gap: 4px; }

.footer-link {
  display: inline-block;
  padding: 5px 0;
  font-size: 15px;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 120ms ease, border-color 120ms ease;
}

.footer-link:hover { color: var(--ice); border-bottom-color: var(--sunset); }

.contact-list { list-style: none; display: flex; flex-direction: column; }

.contact-item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 10px;
  padding: 7px 0;
  border-bottom: 1px dashed rgba(46, 92, 120, 0.55);
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
  padding-top: 3px;
}

.contact-value {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ice);
  word-break: break-word;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 18px;
  padding-bottom: 30px;
  border-top: 1px solid rgba(46, 92, 120, 0.6);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.filing { color: var(--ice); }
.footer-copy { color: var(--mist); }

/* ===================== 通用组件 ===================== */
.frame-window {
  position: relative;
  background: var(--card);
  border: var(--line);
  box-shadow: var(--shadow-hard-lg);
}

.frame-window-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 14px;
  border-bottom: var(--line);
  background: rgba(15, 42, 61, 0.9);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.frame-window-body { padding: clamp(16px, 2.4vw, 30px); }

.frame-ticks {
  height: 10px;
  border-bottom: 1px solid var(--ridge);
  background: repeating-linear-gradient(90deg, var(--ridge) 0 1px, transparent 1px 10px);
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: var(--line);
  box-shadow: var(--shadow-hard);
  transition: box-shadow 140ms ease, transform 140ms ease, background-color 140ms ease, border-color 140ms ease;
}

.card:hover {
  background: var(--dusk);
  border-color: var(--mist);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hard-lg);
}

.card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--ridge);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}

.card-body { padding: 16px; flex: 1 1 auto; }

.card-foot {
  padding: 12px 16px;
  border-top: 1px solid var(--ridge);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 12px;
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  background: rgba(10, 31, 46, 0.62);
  border: 1px solid var(--ridge);
  border-left: 3px solid var(--sunset);
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
}

.metric-value {
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.4vw, 26px);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--ice);
}

.metric-value--away { color: var(--sand); }
.metric-delta { font-family: var(--font-mono); font-size: 13px; color: var(--neon); }

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.table caption {
  text-align: left;
  padding: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.table th,
.table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--ridge);
  text-align: left;
}

.table thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
  border-bottom: var(--line);
}

.table tbody tr { transition: background-color 120ms ease; }
.table tbody tr:hover { background: var(--dusk); }
.table .is-num { font-family: var(--font-mono); text-align: right; font-variant-numeric: tabular-nums; }

.axis-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
  margin-bottom: 10px;
}

.axis-list { list-style: none; display: flex; flex-direction: column; gap: 6px; }

.axis-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  background: rgba(20, 56, 79, 0.5);
  border: 2px solid transparent;
  border-left: 3px solid var(--ridge);
  color: var(--mist);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease, border-color 120ms ease;
}

.axis-link:hover { background: var(--dusk); border-left-color: var(--sunset); color: var(--ice); }

.axis-link[aria-current="true"],
.axis-link.is-active {
  background: var(--sunset);
  border-color: var(--ink);
  border-left-color: var(--neon);
  color: var(--ink);
}

.toc { font-family: var(--font-mono); font-size: 13px; }

.toc-list { list-style: none; display: flex; flex-direction: column; gap: 6px; }

.toc-link {
  display: block;
  padding: 5px 0 5px 12px;
  border-left: 2px solid var(--ridge);
  color: var(--mist);
  text-decoration: none;
  transition: color 120ms ease, border-color 120ms ease;
}

.toc-link:hover { color: var(--ice); border-left-color: var(--sunset); }
.toc-link[aria-current="true"] { color: var(--neon); border-left-color: var(--neon); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: rgba(20, 56, 79, 0.7);
  border: 1px solid var(--ridge);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}

.chip--accent { border-color: var(--sunset); color: var(--sand); background: rgba(244, 129, 60, 0.16); }
.chip--neon { border-color: var(--neon); color: var(--neon); background: rgba(198, 242, 78, 0.1); }

.media-frame {
  position: relative;
  overflow: hidden;
  border: var(--line);
  background: var(--card);
  box-shadow: var(--shadow-hard);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--16-9 { aspect-ratio: 16 / 9; }
.media-frame--4-3 { aspect-ratio: 4 / 3; }
.media-frame--3-2 { aspect-ratio: 3 / 2; }
.media-frame--21-9 { aspect-ratio: 21 / 9; }

.media-frame--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  background-image:
    linear-gradient(135deg, rgba(46, 92, 120, 0.35) 25%, transparent 25%, transparent 50%, rgba(46, 92, 120, 0.35) 50%, rgba(46, 92, 120, 0.35) 75%, transparent 75%);
  background-size: 18px 18px;
}

.media-caption {
  padding: 8px 12px;
  border-top: 1px solid var(--ridge);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.tick-rule {
  height: 12px;
  border-bottom: 1px solid var(--ridge);
  background: repeating-linear-gradient(90deg, var(--ridge) 0 2px, transparent 2px 14px);
}

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

/* 滚动显现 */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 260ms ease, transform 260ms ease;
}

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

/* ===================== 响应式 ===================== */
@media (max-width: 1100px) {
  .header-utility { padding-left: 0; border-left: 0; }
  .grid--split { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 960px) {
  html { scroll-padding-top: 160px; }

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

  .header-inner { align-items: center; }

  .primary-nav {
    display: none;
    order: 5;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--ridge);
  }

  .site-header[data-open] .primary-nav { display: flex; }

  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }

  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 12px 2px;
    border-bottom: 1px solid rgba(46, 92, 120, 0.55);
  }

  .nav-link[aria-current="page"] { border-bottom-color: var(--sunset); }

  .header-utility {
    width: 100%;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid rgba(46, 92, 120, 0.55);
  }

  .utility-list { flex-wrap: wrap; gap: 10px 16px; }

  .header-cta { margin-top: 14px; width: 100%; }

  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-nav { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
}

@media (max-width: 620px) {
  body { font-size: 16px; }

  .header-strip-inner { font-size: 10px; letter-spacing: 0.1em; }
  .strip-scale i:nth-child(n + 4) { display: none; }

  .brand-name { font-size: 17px; }
  .brand-tagline { font-size: 10px; }

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

  .contact-item { grid-template-columns: 54px minmax(0, 1fr); }

  .to-top { right: 12px; bottom: 12px; }
}

@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] {
    opacity: 1 !important;
    transform: none !important;
  }

  .btn:hover,
  .card:hover,
  .to-top { transform: none !important; }
}