/* ===== 01. 复位 ===== */
*,
*::before,
*::after { box-sizing: border-box; }

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

body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, blockquote { margin: 0; padding: 0; }

ul, ol { list-style: none; }

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

a { color: inherit; text-decoration: none; }

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

button { background: none; border: 0; cursor: pointer; }

::selection { background: rgba(216, 169, 75, 0.9); color: #08101f; }

/* ===== 02. 变量 ===== */
:root {
  --ink: #0A1430;
  --ink-deep: #070E22;
  --teal: #0C2C2E;
  --indigo: #1A1740;
  --wine: #3B1220;
  --gold: #D8A94B;
  --gold-line: rgba(216, 169, 75, 0.35);
  --amber: #E8793A;
  --jade: #35C39A;
  --paper: #F3EBDC;
  --mist: #A8B6CE;
  --steel: #26365C;
  --maxw: 1240px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --fs-12: 0.75rem;
  --fs-14: 0.875rem;
  --fs-16: 1rem;
  --fs-20: 1.25rem;
  --fs-26: 1.625rem;
  --fs-34: 2.125rem;
  --fs-46: 2.875rem;
  --fs-64: 4rem;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Roboto Mono", "Courier New", monospace;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --dur: 240ms;
  --radius: 3px;
  --shadow-lift: 0 24px 60px -42px rgba(0, 0, 0, 0.95);
}

/* ===== 03. 基础排版 ===== */
body {
  font-family: var(--font-sans);
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--paper);
  background-color: var(--ink);
  background-image:
    radial-gradient(120% 70% at 50% -10%, rgba(26, 23, 64, 0.85) 0%, rgba(10, 20, 48, 0) 60%),
    radial-gradient(45% 35% at 92% 6%, rgba(216, 169, 75, 0.07), transparent 70%),
    radial-gradient(60% 45% at 4% 82%, rgba(12, 44, 46, 0.75), transparent 72%);
  background-repeat: no-repeat;
  min-height: 100vh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.is-nav-open { overflow: hidden; }

#main-content { display: block; scroll-margin-top: 1rem; }
#main-content:focus { outline: none; }

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

/* ===== 04. 通用工具 ===== */
.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;
}

.skip-link {
  position: absolute;
  left: 50%;
  top: 0.35rem;
  z-index: 120;
  transform: translate(-50%, -180%);
  padding: 0.6rem 1.2rem;
  font-size: var(--fs-14);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #08101f;
  background: linear-gradient(180deg, #E6BC69, #D8A94B);
  border-radius: 0 0 3px 3px;
  transition: transform 180ms var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); }

.display {
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.08;
  color: var(--paper);
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.eyebrow {
  font-size: var(--fs-12);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 700;
}

.lede {
  font-size: clamp(1rem, 1.4vw, 1.0625rem);
  line-height: 1.85;
  color: var(--mist);
  max-width: 38em;
}

.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--gold-line), rgba(216, 169, 75, 0));
}

/* ===== 05. 容器与网格 ===== */
.container {
  width: min(var(--maxw), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

.section { padding-block: clamp(2rem, 6vw, 4rem); }

.band {
  border-block: 1px solid var(--steel);
  background:
    linear-gradient(180deg, rgba(12, 44, 46, 0.72), rgba(10, 20, 48, 0.35)),
    var(--teal);
}

.grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.75rem);
}
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }

.panel {
  position: relative;
  padding: clamp(1rem, 2.5vw, 1.6rem);
  border: 1px solid var(--steel);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(26, 23, 64, 0.55), rgba(10, 20, 48, 0.88));
  box-shadow: var(--shadow-lift);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  padding-block: 1rem;
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--mist);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 0.45rem; }
.breadcrumb li + li::before { content: "›"; color: var(--steel); }
.breadcrumb a { color: var(--mist); transition: color 160ms var(--ease); }
.breadcrumb a:hover { color: var(--gold); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.34rem 0.75rem;
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--mist);
  border: 1px solid var(--steel);
  border-radius: 999px;
  background: rgba(243, 235, 220, 0.02);
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}
.chip:hover { color: var(--paper); border-color: var(--gold-line); }
.chip.is-active,
.chip[aria-pressed="true"] {
  color: var(--jade);
  border-color: rgba(53, 195, 154, 0.6);
  background: rgba(53, 195, 154, 0.12);
}

/* ===== 06. 图片容器基础 ===== */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--steel);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 90% at 20% 0%, rgba(216, 169, 75, 0.16), transparent 60%),
    linear-gradient(150deg, var(--indigo), var(--teal));
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-line), transparent);
  pointer-events: none;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }

/* ===== 07. 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.68rem 1.15rem;
  font-size: var(--fs-14);
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.2;
  text-align: center;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: background-color 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease), transform 180ms var(--ease);
}
.btn:active { transform: translateY(1px); }

.btn--gold {
  color: #08101f;
  background: linear-gradient(180deg, #E6BC69 0%, #D8A94B 100%);
  box-shadow: 0 0 0 1px rgba(216, 169, 75, 0.45), 0 16px 34px -24px rgba(216, 169, 75, 0.95);
}
.btn--gold:hover { background: linear-gradient(180deg, #F2CE88 0%, #E0B255 100%); }

.btn--ghost {
  color: var(--mist);
  border-color: var(--steel);
  background: rgba(243, 235, 220, 0.03);
}
.btn--ghost:hover {
  color: var(--amber);
  border-color: rgba(232, 121, 58, 0.65);
  background: rgba(232, 121, 58, 0.08);
}

.btn--jade {
  color: var(--jade);
  border-color: rgba(53, 195, 154, 0.55);
  background: rgba(53, 195, 154, 0.1);
}
.btn--jade:hover { background: rgba(53, 195, 154, 0.2); }

/* ===== 08. 头部 ===== */
.site-header {
  position: relative;
  z-index: 30;
  color: var(--paper);
  border-bottom: 1px solid var(--steel);
  background-image:
    radial-gradient(120% 200% at 50% -60%, rgba(26, 23, 64, 0.92), transparent 62%),
    linear-gradient(180deg, #0B1734 0%, #091028 100%);
  box-shadow: 0 30px 70px -60px rgba(0, 0, 0, 0.95);
}
.site-header::after {
  content: "";
  position: absolute;
  inset: auto 0 -1px 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(216, 169, 75, 0.55) 22%, rgba(216, 169, 75, 0.55) 78%, transparent);
  pointer-events: none;
}

.scroll-meter {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 70;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--gold), var(--amber));
  pointer-events: none;
}

.header-infobar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  width: min(var(--maxw), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
  padding-block: 0.6rem;
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--mist);
  border-bottom: 1px solid rgba(38, 54, 92, 0.7);
}
.infobar-item {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}
.infobar-item::before {
  content: "";
  width: 6px;
  height: 6px;
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}
.infobar-item--muted::before { border-color: var(--steel); }

.masthead-wrap {
  width: min(var(--maxw), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
  padding-block: clamp(1.1rem, 3vw, 1.9rem) clamp(0.9rem, 2vw, 1.35rem);
  display: grid;
  justify-items: center;
  text-align: center;
}

.masthead {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
}
.masthead-kicker {
  font-size: var(--fs-12);
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 700;
}
.masthead-brand {
  font-size: clamp(2rem, 6.4vw, 3.35rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--paper);
  transition: color 180ms var(--ease);
}
.masthead-brand:hover { color: var(--gold); }
.masthead-subtitle {
  font-size: var(--fs-14);
  letter-spacing: 0.04em;
  color: var(--mist);
}
.masthead::after {
  content: "";
  display: block;
  width: clamp(84px, 18vw, 156px);
  height: 1px;
  margin-top: 0.6rem;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.nav-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  width: min(var(--maxw), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
  padding-block: 0.55rem 1rem;
  border-top: 1px solid rgba(38, 54, 92, 0.7);
}

.nav-row-label {
  display: none;
  font-size: var(--fs-12);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--mist);
  opacity: 0.65;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  flex: 1 1 100%;
  padding: 0.6rem 0.9rem;
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--gold);
  border: 1px solid rgba(216, 169, 75, 0.5);
  border-radius: 2px;
  background: rgba(216, 169, 75, 0.07);
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease);
}
.nav-toggle:hover { border-color: var(--gold); background: rgba(216, 169, 75, 0.14); }
.nav-toggle[aria-expanded="true"] { color: var(--jade); border-color: rgba(53, 195, 154, 0.6); background: rgba(53, 195, 154, 0.12); }

.nav-toggle-bars {
  display: inline-grid;
  gap: 3px;
  width: 16px;
}
.nav-toggle-bars span {
  display: block;
  height: 1.5px;
  background: currentColor;
}
.nav-toggle-label { line-height: 1; }

.site-nav {
  position: fixed;
  inset-block: 0;
  left: 0;
  z-index: 85;
  width: min(320px, 88vw);
  padding: 1.15rem 1.1rem 2.5rem;
  overflow-y: auto;
  border-right: 1px solid rgba(216, 169, 75, 0.4);
  background:
    radial-gradient(110% 55% at 100% 0%, rgba(26, 23, 64, 0.75), transparent 62%),
    linear-gradient(180deg, #0E1A38 0%, #0A1430 58%, #0B282A 100%);
  transform: translateX(-102%);
  visibility: hidden;
  transition: transform var(--dur) var(--ease), visibility 0s linear var(--dur);
}
.site-nav[data-open] {
  transform: translateX(0);
  visibility: visible;
  transition: transform var(--dur) var(--ease), visibility 0s linear 0s;
  box-shadow: 40px 0 80px -40px rgba(0, 0, 0, 0.95);
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}
.nav-list a {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.78rem 0.85rem;
  font-size: var(--fs-16);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #D9E1F0;
  border-bottom: 1px solid rgba(38, 54, 92, 0.55);
  border-radius: 2px;
  transition: color 160ms var(--ease), background-color 160ms var(--ease), box-shadow 160ms var(--ease);
}
.nav-list a:hover { color: var(--gold); background: rgba(216, 169, 75, 0.07); }
.nav-list a[aria-current="page"] {
  color: var(--gold);
  box-shadow: inset 2px 0 0 var(--gold);
}

.nav-drawer {
  display: grid;
  gap: 0.45rem;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(216, 169, 75, 0.28);
}
.drawer-title {
  font-size: var(--fs-12);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 700;
}
.nav-drawer a {
  font-size: var(--fs-14);
  color: var(--mist);
  transition: color 160ms var(--ease);
}
.nav-drawer a:hover { color: var(--paper); }
.drawer-legal {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--steel);
}
.nav-drawer .drawer-back {
  margin-top: 0.7rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.62rem 0.9rem;
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--jade);
  border: 1px solid rgba(53, 195, 154, 0.5);
  border-radius: 2px;
  background: rgba(53, 195, 154, 0.1);
}
.nav-drawer .drawer-back:hover { background: rgba(53, 195, 154, 0.2); color: var(--paper); }

.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(4, 8, 20, 0.72);
  opacity: 0;
  visibility: hidden;
  transition: opacity 260ms var(--ease), visibility 0s linear 260ms;
}
.site-nav[data-open] + .nav-scrim {
  opacity: 1;
  visibility: visible;
  transition: opacity 260ms var(--ease), visibility 0s linear 0s;
}

.header-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
  flex: 1 1 100%;
}
.header-actions .btn { width: 100%; }

/* ===== 09. 页脚 ===== */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  color: var(--paper);
  border-top: 1px solid var(--gold-line);
  background:
    radial-gradient(90% 130% at 50% 0%, rgba(26, 23, 64, 0.6), transparent 64%),
    radial-gradient(60% 60% at 90% 100%, rgba(12, 44, 46, 0.8), transparent 70%),
    linear-gradient(180deg, #091026 0%, #08101F 60%, #0A1430 100%);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: -1px 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.6;
}

.footer-inner {
  width: min(var(--maxw), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
  padding-block: clamp(1.75rem, 5vw, 3rem) 1.25rem;
  display: grid;
  gap: clamp(1.25rem, 4vw, 2rem);
}

.footer-brand-line {
  font-size: clamp(1.125rem, 2.4vw, 1.375rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.4;
  color: var(--paper);
}
.footer-brand-note {
  margin-top: 0.6rem;
  max-width: 34em;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--mist);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.25rem 1.5rem;
}
.footer-col-title {
  margin-bottom: 0.65rem;
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--gold);
}
.footer-col a {
  display: inline-block;
  padding-block: 0.22rem;
  font-size: var(--fs-14);
  color: var(--mist);
  transition: color 160ms var(--ease), transform 160ms var(--ease);
}
.footer-col a:hover { color: var(--paper); transform: translateX(2px); }

.footer-contact {
  display: grid;
  gap: 0.2rem;
  align-content: start;
}
.footer-contact-line {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.02em;
  color: var(--paper);
  word-break: break-all;
}
.footer-contact-note {
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--mist);
}

.footer-help {
  padding: 0.9rem 1rem;
  border: 1px solid rgba(38, 54, 92, 0.95);
  border-radius: 2px;
  background: rgba(12, 44, 46, 0.4);
}
.footer-help-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: var(--fs-14);
  font-weight: 600;
  color: var(--paper);
  list-style: none;
  cursor: pointer;
}
.footer-help-summary::-webkit-details-marker { display: none; }
.footer-help-summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--gold);
  transition: transform 200ms var(--ease);
}
.footer-help[open] .footer-help-summary::after { content: "–"; }
.footer-help-body {
  margin-top: 0.65rem;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--mist);
  max-width: 58ch;
}
.footer-help-link {
  display: inline-block;
  margin-top: 0.6rem;
  font-size: var(--fs-14);
  font-weight: 600;
  color: var(--jade);
  border-bottom: 1px solid rgba(53, 195, 154, 0.45);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.footer-help-link:hover { color: var(--paper); border-color: var(--paper); }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.4rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(38, 54, 92, 0.8);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--mist);
}
.footer-legal p { margin: 0; }

/* ===== 10. 浮动回到主线 ===== */
.to-mainline {
  position: fixed;
  right: clamp(0.75rem, 3vw, 1.75rem);
  bottom: clamp(0.75rem, 3vw, 1.75rem);
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.65rem 1rem;
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.14em;
  color: #08101f;
  border-radius: 2px;
  background: linear-gradient(180deg, #E6BC69, #D8A94B);
  box-shadow: 0 0 0 1px rgba(216, 169, 75, 0.5), 0 20px 44px -26px rgba(216, 169, 75, 0.95);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility 0s linear var(--dur);
}
.to-mainline:hover { background: linear-gradient(180deg, #F2CE88, #E0B255); }
.to-mainline[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility 0s linear 0s;
}

/* ===== 11. 断点 ===== */
@media (min-width: 420px) {
  .header-actions { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 700px) {
  .header-infobar { letter-spacing: 0.22em; }
  .nav-toggle { flex: 0 0 auto; align-self: flex-start; }
  .header-actions { flex: 0 0 auto; grid-template-columns: auto auto; }
  .header-actions .btn { width: auto; }
}

@media (min-width: 1024px) {
  .nav-row {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 1rem;
    padding-block: 0.85rem 1.1rem;
  }
  .nav-row-label { display: block; justify-self: start; }
  .nav-toggle { display: none; }

  .site-nav {
    position: static;
    inset: auto;
    z-index: auto;
    width: auto;
    padding: 0;
    overflow: visible;
    border: 0;
    background: none;
    transform: none;
    visibility: visible;
    transition: none;
    justify-self: center;
  }
  .site-nav[data-open] { transform: none; box-shadow: none; }

  .nav-list {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.1rem;
  }
  .nav-list a {
    padding: 0.55rem 0.8rem;
    font-size: 0.9375rem;
    border-bottom: 0;
    border-radius: 2px;
  }
  .nav-list a::after {
    content: "";
    position: absolute;
    left: 0.8rem;
    right: 0.8rem;
    bottom: 0.22rem;
    height: 1px;
    background: var(--gold);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 200ms var(--ease);
  }
  .nav-list a:hover { color: var(--paper); background: rgba(216, 169, 75, 0.07); }
  .nav-list a:hover::after,
  .nav-list a[aria-current="page"]::after { transform: scaleX(1); }
  .nav-list a[aria-current="page"] { box-shadow: none; }

  .nav-drawer { display: none; }
  .nav-scrim { display: none; }

  .header-actions {
    justify-self: end;
    display: flex;
    gap: 0.6rem;
  }

  .footer-inner {
    grid-template-columns: minmax(230px, 0.95fr) minmax(0, 1.65fr);
    column-gap: clamp(2rem, 5vw, 4.5rem);
    row-gap: 2rem;
  }
  .footer-brand { grid-column: 1; grid-row: 1; }
  .footer-cols {
    grid-column: 2;
    grid-row: 1;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem 1.5rem;
  }
  .footer-contact { grid-column: 1; grid-row: 2; }
  .footer-help { grid-column: 2; grid-row: 2; align-self: start; }
  .footer-legal { grid-column: 1 / -1; grid-row: 3; }
}

@media (min-width: 1280px) {
  .nav-list a { padding-inline: 0.95rem; }
}

/* ===== 12. 减少动态 ===== */
@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;
    transition-delay: 0s !important;
  }
}