/* ============================================================
   欧亿体育数据 — site.css（共享层）
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background: #050807;
}

body {
  margin: 0;
  min-height: 100vh;
  color: #EAF6EF;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background-color: #050807;
  background-image:
    radial-gradient(90% 55% at 50% -12%, rgba(57, 229, 140, 0.13), transparent 68%),
    linear-gradient(to right, rgba(36, 53, 44, 0.20) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 53, 44, 0.20) 1px, transparent 1px);
  background-size: auto, 72px 72px, 72px 72px;
  background-attachment: fixed, scroll, scroll;
}

img, svg, video { display: block; max-width: 100%; }
h1, h2, h3, h4, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }

::selection { background: #39E58C; color: #04140C; }

:focus-visible {
  outline: 2px solid #39E58C;
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------------- 变量 ---------------- */
:root {
  --bg-void: #050807;
  --bg-panel: #0B1210;
  --bg-elevated: #111C17;
  --line-dim: #24352C;
  --line-bright: #2F4A3C;
  --text-primary: #EAF6EF;
  --text-secondary: #A9BDB2;
  --green-arena: #39E58C;
  --green-deep: #0E3B27;
  --orange-signal: #FF7A2F;
  --blue-electric: #4DA3FF;
  --white-signal: #F7FFF9;

  --font-display: "Barlow Condensed", "Oswald", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --shell-max: 1240px;
  --shell-pad: clamp(16px, 4vw, 40px);
  --header-offset: 118px;
}

/* ---------------- 跳转链接 ---------------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  transform: translateY(-180%);
  padding: 10px 18px;
  border-radius: 2px;
  background: var(--green-arena);
  color: #04140C;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  transition: transform 0.2s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--white-signal);
  outline-offset: 2px;
}

/* ---------------- 容器与版式工具 ---------------- */
.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--shell-pad);
}

.main-content {
  display: block;
  padding-bottom: clamp(32px, 5vw, 64px);
  scroll-margin-top: var(--header-offset);
}
#main-content { scroll-margin-top: var(--header-offset); }

.section { padding-block: clamp(40px, 6vw, 84px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 24px;
  margin-bottom: clamp(20px, 3vw, 34px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-dim);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--green-arena);
}
.eyebrow::before {
  content: "";
  width: 20px;
  height: 1px;
  background: currentColor;
  flex: none;
}

.display-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(40px, 5vw, 72px);
  line-height: 1.0;
  letter-spacing: -0.01em;
  color: var(--white-signal);
  text-wrap: balance;
}
.display-title .mono { font-size: 0.66em; color: var(--green-arena); }

.lede {
  max-width: 62ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--text-secondary);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

.rule {
  height: 1px;
  border: 0;
  margin-block: clamp(22px, 3.5vw, 38px);
  background: linear-gradient(90deg, var(--line-bright), var(--line-dim) 45%, transparent);
}

.prose { max-width: 68ch; color: var(--text-secondary); font-size: 16px; line-height: 1.9; }
.prose > * + * { margin-top: 1.05em; }
.prose h2, .prose h3 {
  font-family: var(--font-display);
  color: var(--white-signal);
  line-height: 1.15;
  letter-spacing: 0.01em;
}
.prose h2 { font-size: clamp(24px, 2.6vw, 32px); }
.prose h3 { font-size: clamp(19px, 2vw, 23px); }
.prose strong { color: var(--text-primary); font-weight: 600; }
.prose a {
  color: var(--blue-electric);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.prose a:hover { color: var(--white-signal); }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--line-bright); }
.breadcrumb a {
  color: var(--blue-electric);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.breadcrumb a:hover { color: var(--white-signal); }
.breadcrumb [aria-current="page"] { color: var(--text-primary); }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border: 1px solid var(--line-bright);
  border-radius: 2px;
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1.2;
  text-align: center;
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease),
              background 0.18s var(--ease), color 0.18s var(--ease), filter 0.18s var(--ease);
}
.btn::after { content: "→"; font-family: var(--font-mono); font-size: 0.85em; opacity: 0.8; }
.btn:hover { transform: translateY(-1px); border-color: var(--green-arena); color: var(--white-signal); }
.btn--primary {
  background: var(--green-arena);
  border-color: var(--green-arena);
  color: #04140C;
  box-shadow: 0 10px 26px -18px rgba(57, 229, 140, 0.9);
}
.btn--primary:hover { background: var(--green-arena); color: #04140C; filter: brightness(1.07); }
.btn--signal {
  background: var(--orange-signal);
  border-color: var(--orange-signal);
  color: #1A0800;
  box-shadow: 0 10px 26px -18px rgba(255, 122, 47, 0.95);
}
.btn--signal:hover { color: #1A0800; filter: brightness(1.07); border-color: var(--orange-signal); }
.btn--ghost {
  background: transparent;
  border-color: var(--line-dim);
  color: var(--text-secondary);
}
.btn--ghost:hover { background: rgba(57, 229, 140, 0.08); color: var(--green-arena); }
.btn:focus-visible { outline: 2px solid var(--green-arena); outline-offset: 3px; }

/* ---------------- 芯片与标签 ---------------- */
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border: 1px solid var(--line-dim);
  border-radius: 999px;
  background: rgba(17, 28, 23, 0.72);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.5;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.chip:hover { border-color: var(--green-arena); color: var(--text-primary); }
.chip.is-active,
.chip[aria-pressed="true"] {
  background: var(--green-arena);
  border-color: var(--green-arena);
  color: #04140C;
  font-weight: 600;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line-dim);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  background: rgba(11, 18, 16, 0.9);
}
.tag--signal { color: var(--orange-signal); border-color: rgba(255, 122, 47, 0.45); }
.tag--blue { color: var(--blue-electric); border-color: rgba(77, 163, 255, 0.42); }

/* ---------------- Bento 与卡片 ---------------- */
.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(10px, 1.4vw, 16px);
}

.card {
  position: relative;
  padding: clamp(16px, 2vw, 26px);
  border: 1px solid var(--line-dim);
  border-radius: 3px;
  background:
    linear-gradient(168deg, var(--bg-elevated) 0%, var(--bg-panel) 72%);
  box-shadow: inset 0 1px 0 rgba(247, 255, 249, 0.045);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease),
              box-shadow 0.18s var(--ease);
}
.card:hover {
  transform: translateY(-2px);
  border-color: rgba(57, 229, 140, 0.38);
  box-shadow: 0 20px 36px -28px rgba(57, 229, 140, 0.7),
              inset 0 1px 0 rgba(247, 255, 249, 0.07);
}

.card-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.22;
  letter-spacing: 0.01em;
  color: var(--white-signal);
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--green-arena);
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* ---------------- 图片容器基础 ---------------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line-dim);
  border-radius: 3px;
  background:
    radial-gradient(120% 110% at 18% 0%, rgba(57, 229, 140, 0.16), transparent 62%),
    linear-gradient(158deg, var(--bg-elevated), var(--bg-panel) 78%);
  isolation: isolate;
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(57, 229, 140, 0.10) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(57, 229, 140, 0.10) 1px, transparent 1px);
  background-size: 44px 44px, 44px 44px;
  mix-blend-mode: screen;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  z-index: 3;
  pointer-events: none;
  background: linear-gradient(90deg, var(--green-arena), transparent 55%, var(--orange-signal));
  opacity: 0.7;
}
.media-inner {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(0.9) contrast(1.05) brightness(0.92);
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--portrait { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-cap {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 4;
  padding: 4px 9px;
  border: 1px solid rgba(57, 229, 140, 0.35);
  border-radius: 2px;
  background: rgba(5, 8, 7, 0.82);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green-arena);
}

/* ============================================================
   头部
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  color: var(--text-primary);
  background: linear-gradient(180deg, rgba(11, 18, 16, 0.97) 0%, rgba(5, 8, 7, 0.95) 100%);
  border-bottom: 1px solid var(--line-dim);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.header-strip {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 34px;
  padding-inline: clamp(12px, 3vw, 32px);
  border-bottom: 1px solid rgba(36, 53, 44, 0.7);
  background: rgba(14, 59, 39, 0.16);
  font-size: 12px;
  color: var(--text-secondary);
}

.strip-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green-arena);
}

.status-dot {
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--green-arena);
  box-shadow: 0 0 0 3px rgba(57, 229, 140, 0.16);
  animation: dot-breathe 2.8s var(--ease) infinite;
}
@keyframes dot-breathe {
  0%, 100% { opacity: 0.55; box-shadow: 0 0 0 3px rgba(57, 229, 140, 0.10); }
  50% { opacity: 1; box-shadow: 0 0 0 6px rgba(57, 229, 140, 0.20); }
}

.strip-marquee {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  font-size: 12px;
  letter-spacing: 0.04em;
}

.strip-meta {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange-signal);
}

.header-main {
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 26px);
  min-height: 72px;
  padding: 10px clamp(12px, 3vw, 32px);
}

/* 品牌铭牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  color: var(--text-primary);
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #04140C;
  background: linear-gradient(150deg, var(--green-arena), #1FB870);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.12; }
.brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white-signal);
  white-space: nowrap;
}
.brand-suffix {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.brand-descriptor {
  padding-left: 14px;
  border-left: 1px solid var(--line-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* 导航 */
.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: clamp(6px, 1vw, 16px);
}
.nav-list { display: flex; align-items: center; gap: 2px; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 10px 10px 9px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 14px;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: color 0.18s var(--ease), background 0.18s var(--ease),
              border-color 0.18s var(--ease);
}
.nav-index {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  color: var(--line-bright);
  transition: color 0.18s var(--ease);
}
.nav-label { font-weight: 500; }
.nav-link:hover {
  color: var(--white-signal);
  background: rgba(57, 229, 140, 0.08);
  border-color: rgba(57, 229, 140, 0.28);
}
.nav-link:hover .nav-index { color: var(--green-arena); }
.nav-link[aria-current="page"] {
  background: var(--green-arena);
  border-color: var(--green-arena);
  color: #04140C;
  font-weight: 600;
}
.nav-link[aria-current="page"] .nav-index { color: rgba(4, 20, 12, 0.62); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: 2px;
  background: var(--orange-signal);
  color: #1A0800;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
  box-shadow: inset 0 0 0 1px rgba(255, 122, 47, 0.7), 0 8px 22px -16px rgba(255, 122, 47, 0.95);
  transition: transform 0.18s var(--ease), filter 0.18s var(--ease);
}
.nav-cta::after { content: "→"; font-family: var(--font-mono); font-size: 0.85em; }
.nav-cta:hover { transform: translateY(-1px); filter: brightness(1.08); }
.nav-cta:focus-visible { outline: 2px solid var(--green-arena); outline-offset: 3px; }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 13px;
  border: 1px solid var(--line-dim);
  border-radius: 2px;
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}
.nav-toggle:hover { border-color: var(--green-arena); color: var(--green-arena); }
.nav-toggle-bars { display: grid; gap: 4px; width: 16px; }
.nav-toggle-bars span {
  display: block;
  height: 2px;
  background: var(--green-arena);
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:first-child {
  transform: translateY(3px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}
.nav-toggle-label { line-height: 1; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  margin-top: clamp(48px, 7vw, 96px);
  border-top: 1px solid var(--line-dim);
  background:
    radial-gradient(120% 90% at 10% 0%, rgba(57, 229, 140, 0.10), transparent 64%),
    linear-gradient(180deg, var(--bg-panel) 0%, var(--bg-void) 100%);
  color: var(--text-secondary);
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(230px, 1.15fr) minmax(300px, 1.45fr) minmax(230px, 1fr);
  gap: clamp(24px, 4vw, 52px);
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: clamp(32px, 5vw, 62px) var(--shell-pad) clamp(24px, 3vw, 40px);
}

.footer-brand { display: flex; flex-direction: column; gap: 14px; }

.footer-summary {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
  max-width: 30ch;
}

.footer-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--green-arena);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 36px);
}

.footer-col { display: flex; flex-direction: column; gap: 12px; }

.footer-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-primary);
}
.footer-title::before {
  content: "";
  width: 7px;
  height: 7px;
  flex: none;
  background: var(--green-arena);
  clip-path: polygon(0 0, 100% 0, 100% 60%, 60% 100%, 0 100%);
}

.footer-list { display: grid; gap: 9px; font-size: 14px; }
.footer-list a {
  display: inline-block;
  color: var(--text-secondary);
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.footer-list a:hover { color: var(--green-arena); border-bottom-color: rgba(57, 229, 140, 0.55); }

.footer-contact { display: flex; flex-direction: column; gap: 12px; }

.contact-list { display: grid; gap: 10px; margin: 0; }
.contact-row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding-bottom: 9px;
  border-bottom: 1px solid rgba(36, 53, 44, 0.55);
}
.contact-row dt {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--line-bright);
  padding-top: 3px;
}
.contact-row dd {
  margin: 0;
  color: var(--text-primary);
  font-size: 13.5px;
  line-height: 1.6;
  word-break: break-word;
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 16px var(--shell-pad) 26px;
  border-top: 1px solid var(--line-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}
.footer-legal { color: var(--text-secondary); }
.footer-note { color: var(--text-secondary); flex: 1 1 260px; }
.footer-stamp {
  color: var(--orange-signal);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  white-space: nowrap;
}

/* ============================================================
   滚动进度与显现
   ============================================================ */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  pointer-events: none;
  background: transparent;
}
.scroll-progress-bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--green-arena), var(--blue-electric) 58%, var(--orange-signal));
  transition: transform 0.1s linear;
}

html.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
html.has-js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1180px) {
  .brand-descriptor { display: none; }
  .nav-link { padding: 10px 7px; font-size: 13.5px; }
}

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-contact { grid-column: 1 / -1; }
  .footer-summary { max-width: none; }
}

@media (max-width: 1023px) {
  :root { --header-offset: 116px; }

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

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    margin-left: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px clamp(12px, 3vw, 24px) 18px;
    background: rgba(6, 12, 10, 0.99);
    border-top: 1px solid var(--line-dim);
    border-bottom: 1px solid var(--line-dim);
    box-shadow: 0 26px 44px -26px #000000;
    max-height: calc(100vh - 116px);
    overflow-y: auto;
  }
  .site-nav[data-open],
  .site-nav[data-open="true"] { display: flex; }

  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-link {
    justify-content: space-between;
    padding: 14px 6px;
    border: 0;
    border-bottom: 1px solid rgba(36, 53, 44, 0.62);
    border-radius: 0;
    font-size: 16px;
  }
  .nav-link:hover { background: rgba(57, 229, 140, 0.07); border-color: rgba(36, 53, 44, 0.62); }
  .nav-link[aria-current="page"] {
    background: transparent;
    border-color: rgba(36, 53, 44, 0.62);
    color: var(--green-arena);
    border-left: 2px solid var(--green-arena);
    padding-left: 12px;
  }
  .nav-link[aria-current="page"] .nav-index { color: var(--green-arena); }
  .nav-index { font-size: 11px; }

  .nav-cta { margin-top: 16px; justify-content: center; padding: 14px 18px; font-size: 16px; }
}

@media (max-width: 720px) {
  .header-strip { height: auto; min-height: 32px; padding-block: 6px; gap: 10px; }
  .strip-marquee { display: none; }
  .strip-meta { margin-left: auto; font-size: 9px; letter-spacing: 0.12em; }
  .header-main { min-height: 64px; padding-block: 8px; }
  .brand-mark { width: 32px; height: 32px; font-size: 11px; }
  .brand-name { font-size: 17px; }
  .brand-suffix { font-size: 9px; letter-spacing: 0.22em; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .contact-row { grid-template-columns: 48px minmax(0, 1fr); }
}

@media (max-width: 420px) {
  .footer-nav { grid-template-columns: 1fr; }
  .footer-stamp { letter-spacing: 0.12em; }
}

/* ============================================================
   动效降级
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .status-dot { animation: none; opacity: 1; }
  .scroll-progress-bar { transition: none; }
  html.has-js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}