/* ============================================================
   爱体育月卡 · 全站共享样式 /assets/site.css
   夜间场馆聚光体系：墨黑基底 + 荧光青灯带 + 琥珀金数据
   ============================================================ */

:root {
  --ink: #070B09;
  --green-deep: #0D241D;
  --green-turf: #14382C;
  --paper: #F3F7F0;
  --cyan: #33F0CE;
  --cyan-mist: #A6FFEA;
  --amber: #F0B54A;
  --gray: #9AA8A1;
  --cream: #E9E1CC;
  --signal: #5BD68A;

  --font-head: "Barlow Condensed", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 22px;
  --radius-pill: 999px;

  --shell: 1200px;
  --gutter: clamp(18px, 4vw, 44px);

  --line-soft: rgba(166, 255, 234, 0.14);
  --line-strong: rgba(166, 255, 234, 0.3);
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 104px;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(92% 58% at 82% -8%, rgba(51, 240, 206, 0.10), transparent 62%),
    radial-gradient(66% 46% at 4% 6%, rgba(240, 181, 74, 0.055), transparent 60%),
    var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.012em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, picture, video { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; }
button { font: inherit; color: inherit; }

::selection {
  background: rgba(51, 240, 206, 0.28);
  color: #F3F7F0;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 中文排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0.012em;
  margin: 0 0 0.55em;
  color: var(--paper);
}

h1 { font-size: clamp(2.25rem, 5.2vw, 4rem); }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.65rem); letter-spacing: 0.02em; }
h4 { font-size: 1.0625rem; letter-spacing: 0.04em; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--cyan-mist); }

strong { font-weight: 700; color: var(--paper); }

.display {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.6rem, 6.4vw, 5.4rem);
  line-height: 0.98;
  letter-spacing: 0.01em;
  margin: 0 0 0.4em;
}

.lede {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 1.78;
  color: #D6E3DC;
  max-width: 62ch;
}

.prose { max-width: 68ch; }
.prose p { margin-bottom: 1.15em; color: #D2DFD8; }
.prose h3 { margin-top: 1.6em; }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.data {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--amber);
  letter-spacing: 0.03em;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow { max-width: 760px; }

.section {
  position: relative;
  padding-block: clamp(48px, 7vw, 96px);
}

.section--tight { padding-block: clamp(30px, 4vw, 56px); }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 5px 13px 5px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: rgba(20, 56, 44, 0.72);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan-mist);
  line-height: 1.6;
}

.section-label::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  flex: 0 0 auto;
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.grid > * { grid-column: span 12; min-width: 0; }

@media (min-width: 721px) {
  .grid > .col-3  { grid-column: span 3; }
  .grid > .col-4  { grid-column: span 4; }
  .grid > .col-5  { grid-column: span 5; }
  .grid > .col-6  { grid-column: span 6; }
  .grid > .col-7  { grid-column: span 7; }
  .grid > .col-8  { grid-column: span 8; }
  .grid > .col-9  { grid-column: span 9; }
  .grid > .col-12 { grid-column: span 12; }
}

@media (max-width: 720px) {
  .grid { grid-template-columns: minmax(0, 1fr); }
  .grid > * { grid-column: 1 / -1; }
}

/* ---------- 面板 / 卡片基底 ---------- */
.panel {
  position: relative;
  background: linear-gradient(158deg, rgba(20, 56, 44, 0.84) 0%, rgba(13, 36, 29, 0.94) 100%);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  padding: clamp(18px, 2.4vw, 28px);
  overflow: hidden;
}

.panel--paper {
  background: linear-gradient(158deg, #EFE8D6 0%, #DFD5BC 100%);
  border-color: rgba(7, 11, 9, 0.22);
  color: #17241E;
  box-shadow: 0 18px 34px -26px rgba(0, 0, 0, 0.9);
}

.panel--paper h2,
.panel--paper h3,
.panel--paper h4 { color: #10201A; }

.panel--paper p { color: #2C3B33; }

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  line-height: 1.8;
  border: 1px solid transparent;
  white-space: nowrap;
}

.tag--cyan {
  color: var(--cyan);
  background: rgba(51, 240, 206, 0.1);
  border-color: rgba(51, 240, 206, 0.4);
}

.tag--amber {
  color: var(--amber);
  background: rgba(240, 181, 74, 0.1);
  border-color: rgba(240, 181, 74, 0.42);
}

.tag--signal {
  color: var(--signal);
  background: rgba(91, 214, 138, 0.1);
  border-color: rgba(91, 214, 138, 0.38);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 22px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.18s ease, background-color 0.18s ease,
              color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(135deg, #33F0CE 0%, #14C8A9 100%);
  color: #04120E;
  box-shadow: 0 16px 32px -18px rgba(51, 240, 206, 0.95);
}
.btn--primary:hover { color: #04120E; box-shadow: 0 20px 38px -18px rgba(51, 240, 206, 1); }

.btn--amber {
  background: linear-gradient(135deg, #F5C86A 0%, #E0A233 100%);
  color: #221706;
  box-shadow: 0 16px 32px -20px rgba(240, 181, 74, 0.9);
}
.btn--amber:hover { color: #221706; }

.btn--ghost {
  background: rgba(20, 56, 44, 0.62);
  color: var(--paper);
  border-color: var(--line-strong);
}
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan-mist); }

.btn--quiet {
  background: transparent;
  color: var(--cyan-mist);
  border-color: rgba(166, 255, 234, 0.22);
}
.btn--quiet:hover { border-color: var(--cyan); color: var(--paper); }

/* ---------- 面包屑 ---------- */
.breadcrumb { margin-bottom: clamp(20px, 3vw, 32px); }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gray);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: rgba(154, 168, 161, 0.5);
}

.breadcrumb-link { color: var(--gray); text-decoration: none; }
.breadcrumb-link:hover { color: var(--cyan-mist); }

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

/* ---------- 图像容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius-m);
  border: 1px solid var(--line-soft);
  background:
    radial-gradient(72% 84% at 50% 118%, rgba(51, 240, 206, 0.22), transparent 68%),
    radial-gradient(50% 50% at 18% 0%, rgba(240, 181, 74, 0.12), transparent 70%),
    linear-gradient(158deg, #0D241D 0%, #070B09 100%);
}

.media-frame > img,
.media-frame > picture,
.media-frame > picture > img,
.media-frame > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

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

@media (max-width: 560px) {
  .media-frame--wide { aspect-ratio: 16 / 9; }
  .media-frame--portrait { aspect-ratio: 3 / 4; }
}

/* ---------- 显现动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

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

/* ---------- 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 50%;
  z-index: 300;
  transform: translate(-50%, -180%);
  padding: 10px 22px;
  border-radius: 0 0 12px 12px;
  background: var(--cyan);
  color: #04120E;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
  transition: transform 0.2s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translate(-50%, 0);
  color: #04120E;
}

/* ============================================================
   头部
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  padding: 12px var(--gutter);
  background:
    radial-gradient(120% 150% at 16% -40%, rgba(51, 240, 206, 0.14), transparent 60%),
    linear-gradient(180deg, rgba(11, 26, 21, 0.97) 0%, rgba(7, 11, 9, 0.95) 100%);
  border-bottom: 1px solid var(--line-soft);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(51, 240, 206, 0.55) 22%, rgba(240, 181, 74, 0.42) 64%, transparent);
  pointer-events: none;
}

.header-shell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--shell);
  margin-inline: auto;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  color: var(--paper);
  flex: 0 0 auto;
}

.brand:hover { color: var(--paper); }

.brand-mark {
  position: relative;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  border-radius: 13px;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 32%, #EAFFF8 0%, #33F0CE 24%, #123C30 64%, #0B1A15 100%);
  box-shadow: 0 0 0 1px rgba(166, 255, 234, 0.34), 0 12px 26px -16px rgba(51, 240, 206, 0.95);
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 7px;
  width: 22px;
  height: 9px;
  transform: translateX(-50%);
  border-radius: 50%;
  border: 2px solid rgba(7, 11, 9, 0.55);
  border-top-color: transparent;
  opacity: 0.85;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--paper);
  display: block;
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--gray);
  display: block;
}

/* 右侧动作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

/* 悬浮胶囊导航 */
.nav-capsule {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  border-radius: var(--radius-pill);
  background: rgba(20, 56, 44, 0.72);
  border: 1px solid var(--line-soft);
  box-shadow: inset 0 1px 0 rgba(243, 247, 240, 0.06), 0 20px 42px -30px rgba(0, 0, 0, 0.95);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.nav-item { display: block; min-width: 0; }

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  color: #CFE3DA;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.nav-link:hover {
  color: var(--paper);
  background: rgba(166, 255, 234, 0.1);
}

.nav-link[aria-current="page"] {
  color: #04120E;
  background: var(--cyan);
  box-shadow: 0 0 24px -8px rgba(51, 240, 206, 0.9);
}

.nav-link[aria-current="page"]:hover {
  color: #04120E;
  background: var(--cyan-mist);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  margin-left: 4px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, #F3F7F0 0%, #E4EBDD 100%);
  color: #0A1712;
  font-size: 13.5px;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.nav-cta:hover {
  color: #04120E;
  background: linear-gradient(135deg, #A6FFEA 0%, #33F0CE 100%);
  box-shadow: 0 0 24px -8px rgba(51, 240, 206, 0.9);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  min-width: 44px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  background: rgba(20, 56, 44, 0.78);
  color: var(--paper);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

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

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: background-color 0.2s ease;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.24s 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 { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-5px) rotate(-45deg); }

.nav-toggle-label { line-height: 1; }

/* 滚动光带 */
.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(166, 255, 234, 0.1);
  overflow: hidden;
  pointer-events: none;
}

.scroll-meter-fill {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan-mist) 55%, var(--amber) 100%);
  box-shadow: 0 0 12px rgba(51, 240, 206, 0.75);
}

/* ---------- 头部响应式 ---------- */
@media (max-width: 1080px) {
  .nav-link { padding: 0 11px; font-size: 13.5px; }
  .nav-cta { padding: 0 14px; font-size: 13px; }
}

@media (max-width: 900px) {
  .site-header { padding-block: 10px; }

  .header-shell {
    justify-content: space-between;
    gap: 12px;
  }

  .header-actions { position: static; }

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

  .nav-capsule {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 10px;
    border-radius: var(--radius-l);
    background: linear-gradient(168deg, #0E2A22 0%, #0A1A15 100%);
    border: 1px solid var(--line-strong);
    box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.98);
  }

  .nav-capsule[data-open="true"] {
    display: flex;
    animation: navDrop 0.2s ease-out both;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    width: 100%;
  }

  .nav-item { width: 100%; }

  .nav-link {
    display: flex;
    width: 100%;
    min-height: 48px;
    padding: 0 16px;
    border-radius: 12px;
    font-size: 15px;
  }

  .nav-cta {
    width: 100%;
    min-height: 46px;
    margin: 6px 0 0;
    font-size: 14px;
  }
}

@keyframes navDrop {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 460px) {
  .brand-tag { display: none; }
  .brand-name { font-size: 16px; letter-spacing: 0.06em; }
  .brand-mark { width: 34px; height: 34px; border-radius: 11px; }
  .nav-toggle { padding: 0 12px; }
  .nav-toggle-label { display: none; }
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 108px);
  overflow: hidden;
  background:
    radial-gradient(84% 120% at 88% 0%, rgba(51, 240, 206, 0.13), transparent 58%),
    radial-gradient(56% 80% at 6% 100%, rgba(240, 181, 74, 0.08), transparent 62%),
    linear-gradient(180deg, #0B1D17 0%, #070B09 66%);
  border-top: 1px solid var(--line-strong);
  color: #D2DFD8;
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 6px;
  opacity: 0.5;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(166, 255, 234, 0.3) 0 1px, transparent 1px 26px);
}

.footer-shell {
  display: grid;
  grid-template-columns: 1.15fr 1.5fr 1fr;
  gap: clamp(28px, 4vw, 52px);
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(40px, 5vw, 66px) var(--gutter) 0;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  min-width: 0;
}

.footer-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-name {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--paper);
  line-height: 1.15;
}

.footer-line {
  margin: 0;
  font-size: 13.5px;
  color: var(--gray);
}

.footer-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  margin-top: 6px;
  padding: 0 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  background: rgba(20, 56, 44, 0.8);
  color: var(--cyan-mist);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.footer-cta:hover {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04120E;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 34px);
  min-width: 0;
}

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

.footer-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray);
}

.footer-list {
  display: grid;
  gap: 9px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-link {
  display: inline-block;
  color: #C6D6CF;
  font-size: 14.5px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer-link:hover {
  color: var(--cyan-mist);
  border-bottom-color: rgba(51, 240, 206, 0.55);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.footer-note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: #B7C8C0;
  overflow-wrap: anywhere;
}

.footer-key {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--cyan-mist);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 26px;
  max-width: var(--shell);
  margin: clamp(28px, 4vw, 46px) auto 0;
  padding: 20px var(--gutter) 34px;
  border-top: 1px solid rgba(166, 255, 234, 0.1);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--gray);
}

.footer-legal,
.footer-copy { margin: 0; }

.footer-icp { color: #C6D6CF; }

@media (max-width: 900px) {
  .footer-shell { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 600px) {
  .footer-shell { grid-template-columns: minmax(0, 1fr); }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-base { flex-direction: column; align-items: flex-start; gap: 8px; }
}

/* ============================================================
   减弱动效
   ============================================================ */
@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;
    transform: none;
  }

  .btn:hover { transform: none; }
  .scroll-meter-fill { transition: none !important; }
}