/* ==========================================================================
   澳门新萄京CN · 共享样式 /assets/site.css
   静水深流自有声：深墨蓝基底 · 夜河灰过渡 · 铜金刻度 · 水光青细线
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; background: #0A1A28; }
body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, picture, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 色彩 */
  --ink: #0A1A28;
  --night: #16242F;
  --slate: #24333F;
  --copper: #C08A3E;
  --red: #9A3B3B;
  --aqua: #7FA8B4;
  --paper: #F4F2EC;
  --steel: #93A2AE;
  --copper-pale: #E0C79A;
  --film: #05101A;

  --line-soft: rgba(127, 168, 180, 0.18);
  --line-mid: rgba(127, 168, 180, 0.32);
  --line-copper: rgba(192, 138, 62, 0.34);
  --text-soft: rgba(244, 242, 236, 0.82);

  /* 字体 */
  --font-head: "Source Han Serif SC", "Songti SC", "Noto Serif SC", Georgia, "Times New Roman", serif;
  --font-body: "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Inter, system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 节奏 */
  --wrap: 1200px;
  --measure: 36em;
  --gap: clamp(20px, 3vw, 36px);
  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 32px;
  --sp-5: 48px;
  --sp-6: 72px;

  /* 动效 */
  --ease-water: cubic-bezier(0.22, 0.7, 0.2, 1);
}

/* ---------- 3. 中文排版基座 ---------- */
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--paper);
  background: transparent;
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: -8% -4% -8% -4%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(120% 60% at 50% 0%, rgba(36, 51, 63, 0.55), rgba(10, 26, 40, 0) 70%),
    radial-gradient(90% 55% at 18% 100%, rgba(127, 168, 180, 0.09), rgba(10, 26, 40, 0) 72%);
  transform: translate3d(0, var(--drift, 0px), 0);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.01em;
}
h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 2.2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

a { color: var(--aqua); transition: color 0.25s ease; }
a:hover { color: var(--copper-pale); }
strong { font-weight: 600; color: var(--paper); }
small { font-size: 0.8125rem; }

:focus-visible {
  outline: 2px solid var(--copper-pale);
  outline-offset: 3px;
}
::selection { background: var(--copper); color: var(--film); }

/* ---------- 4. 布局基座 ---------- */
.container {
  width: min(var(--wrap), 100% - 3rem);
  margin-inline: auto;
}
.section { padding: clamp(48px, 7vw, 88px) 0; }
.section--tight { padding: clamp(32px, 4.5vw, 56px) 0; }
.section--night { background: var(--night); }
.section--slate { background: var(--slate); }

.section__head { max-width: var(--measure); margin-bottom: var(--sp-4); }
.section__head + .grid { margin-top: var(--sp-2); }

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  color: var(--copper);
  margin-bottom: var(--sp-2);
}

.rule {
  border: 0;
  height: 1px;
  margin: 0;
  background: linear-gradient(90deg, rgba(192, 138, 62, 0.55), rgba(127, 168, 180, 0.22) 45%, rgba(127, 168, 180, 0) 100%);
}

.grid { display: grid; gap: var(--gap); }
.grid--split { grid-template-columns: minmax(0, 2.35fr) minmax(0, 1fr); }
.grid--halves { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--thirds { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--mosaic { grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); }
.grid--editorial {
  display: grid;
  grid-template-columns: minmax(0, 62fr) minmax(0, 26fr) minmax(0, 12fr);
  gap: var(--gap);
}

.rail { display: flex; flex-direction: column; gap: var(--sp-3); }
.rail__item {
  border-top: 1px solid var(--line-soft);
  padding-top: var(--sp-2);
  font-size: 0.8125rem;
  line-height: 1.85;
  color: var(--steel);
}
.stack > * + * { margin-top: 12px; }

/* ---------- 5. 文字组件 ---------- */
.display { font-size: clamp(2.5rem, 6vw, 4.75rem); letter-spacing: 0.02em; }
.title-lg { font-size: clamp(2rem, 3.6vw, 2.75rem); }
.title-md { font-size: clamp(1.35rem, 2.4vw, 1.75rem); }

.prose {
  max-width: var(--measure);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-soft);
}
.prose p + p { margin-top: 1.05em; }
.prose--lead { font-size: 1.0625rem; color: var(--paper); }

.num {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
  font-size: 0.9375em;
}

/* ---------- 6. 通用按钮与链接 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  letter-spacing: 0.18em;
  border: 1px solid transparent;
  border-radius: 0;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}
.btn--copper { background: var(--copper); color: var(--film); }
.btn--copper:hover { background: var(--copper-pale); color: var(--film); }
.btn--ghost {
  border-color: var(--line-mid);
  background: rgba(36, 51, 63, 0.4);
  color: var(--paper);
}
.btn--ghost:hover { border-color: var(--copper); color: var(--copper-pale); }

.ghost-link {
  position: relative;
  display: inline-block;
  padding-bottom: 4px;
  font-size: 0.8125rem;
  letter-spacing: 0.2em;
  color: var(--steel);
}
.ghost-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--line-mid);
  transform-origin: left;
  transition: background-color 0.25s ease, transform 0.3s var(--ease-water);
}
.ghost-link:hover { color: var(--copper-pale); }
.ghost-link:hover::after { background: var(--copper); transform: scaleX(1.02); }

/* ---------- 7. 面板 / 标签 / 图形 ---------- */
.panel {
  padding: var(--sp-3) var(--sp-3);
  background: rgba(36, 51, 63, 0.55);
  border: 1px solid var(--line-soft);
  border-radius: 0;
}
.panel--night { background: var(--night); }
.panel--slate { background: var(--slate); }
.panel--edge { border-left: 2px solid var(--copper); }

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  border: 1px solid var(--line-mid);
  color: var(--steel);
}
.tag--ended { border-color: rgba(154, 59, 59, 0.75); background: rgba(154, 59, 59, 0.18); color: var(--paper); }
.tag--live { border-color: rgba(192, 138, 62, 0.7); background: rgba(192, 138, 62, 0.14); color: var(--copper-pale); }

.figure {
  margin: 0;
  background: var(--night);
  border: 1px solid var(--line-soft);
  overflow: hidden;
}
.figure__frame {
  position: relative;
  display: flex;
  align-items: flex-end;
  aspect-ratio: 16 / 9;
  padding: var(--sp-2);
  background:
    radial-gradient(120% 80% at 20% 110%, rgba(127, 168, 180, 0.16), rgba(5, 16, 26, 0) 70%),
    repeating-linear-gradient(90deg, rgba(127, 168, 180, 0.07) 0 1px, rgba(127, 168, 180, 0) 1px 56px),
    linear-gradient(180deg, var(--slate), var(--film));
}
.figure__frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure__frame--wide { aspect-ratio: 21 / 9; }
.figure__frame--square { aspect-ratio: 1 / 1; }
.figure__frame--tall { aspect-ratio: 3 / 4; }
.figure__caption {
  padding: 12px var(--sp-2);
  font-size: 0.8125rem;
  line-height: 1.7;
  letter-spacing: 0.05em;
  color: var(--steel);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 8. 筛选条（只筛选当前页面已存在内容） ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: var(--sp-2) 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.filter-bar__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--steel);
  margin-right: 6px;
}
.filter-chip {
  padding: 9px 16px;
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  border: 1px solid var(--line-mid);
  border-radius: 0;
  color: var(--steel);
  transition: color 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}
.filter-chip:hover { color: var(--paper); border-color: var(--aqua); }
.filter-chip[aria-pressed="true"] {
  background: var(--copper);
  border-color: var(--copper);
  color: var(--film);
}
[data-filter-item][hidden] { display: none !important; }

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  padding-top: var(--sp-3);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--steel);
}
.breadcrumb__list { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.breadcrumb__item { display: inline-flex; align-items: center; gap: 10px; }
.breadcrumb__item + .breadcrumb__item::before { content: "/"; color: rgba(127, 168, 180, 0.5); }
.breadcrumb__link { color: var(--steel); }
.breadcrumb__link:hover { color: var(--copper-pale); }
.breadcrumb__item [aria-current="page"] { color: var(--paper); }

/* ---------- 10. 工具类 ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: absolute;
  top: -120px;
  left: 16px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--copper);
  color: var(--film);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  transition: top 0.25s ease;
}
.skip-link:focus { top: 16px; color: var(--film); }

/* ---------- 11. 页头 ---------- */
.site-header {
  position: relative;
  isolation: isolate;
  background: linear-gradient(180deg, var(--film) 0%, var(--ink) 62%, var(--night) 100%);
  border-bottom: 1px solid var(--line-copper);
}
.site-header::before {
  content: "";
  position: absolute;
  z-index: -1;
  left: -12%;
  right: -12%;
  bottom: -90px;
  height: 180px;
  pointer-events: none;
  background: radial-gradient(58% 100% at 50% 0%, rgba(127, 168, 180, 0.16), rgba(127, 168, 180, 0) 72%);
}
.site-header__inner { position: relative; padding: clamp(20px, 3.4vw, 34px) 0 0; }

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: var(--sp-2);
  padding-bottom: clamp(16px, 2.4vw, 26px);
}
.masthead__brand-wrap { grid-column: 2; text-align: center; }
.masthead__brand {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: 0.16em;
  text-indent: 0.16em;
  color: var(--paper);
  transition: color 0.3s ease;
}
.masthead__brand:hover { color: var(--copper-pale); }
.masthead__tagline {
  margin-top: 8px;
  font-size: 0.75rem;
  letter-spacing: 0.42em;
  text-indent: 0.42em;
  color: var(--steel);
}
.masthead__actions {
  grid-column: 3;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-toggle {
  grid-column: 1;
  justify-self: start;
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line-mid);
  color: var(--paper);
  font-size: 0.8125rem;
  letter-spacing: 0.2em;
  transition: border-color 0.25s ease, color 0.25s ease;
}
.nav-toggle:hover { border-color: var(--copper); color: var(--copper-pale); }
.nav-toggle__bars { display: inline-flex; flex-direction: column; justify-content: center; gap: 4px; width: 18px; }
.nav-toggle__bars span {
  display: block;
  height: 1px;
  background: var(--copper-pale);
  transition: transform 0.28s var(--ease-water), opacity 0.2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle__label { line-height: 1; }

.site-nav {
  position: relative;
  border-top: 1px solid var(--line-mid);
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(90deg, rgba(36, 51, 63, 0) 0%, rgba(36, 51, 63, 0.55) 50%, rgba(36, 51, 63, 0) 100%);
}
.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
}
.site-nav__item { position: relative; }
.site-nav__item + .site-nav__item { border-left: 1px solid var(--line-soft); }
.site-nav__link {
  position: relative;
  display: block;
  padding: 16px 22px;
  font-size: 0.9375rem;
  letter-spacing: 0.14em;
  color: var(--paper);
  transition: color 0.25s ease, background-color 0.25s ease, opacity 0.18s ease, transform 0.18s ease;
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 0;
  height: 2px;
  background: var(--copper);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease-water);
}
.site-nav__link:hover { color: var(--copper-pale); background: rgba(192, 138, 62, 0.06); }
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--copper-pale); }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }
.site-nav__note {
  padding: 10px 16px 12px;
  text-align: center;
  font-size: 0.75rem;
  letter-spacing: 0.24em;
  color: var(--steel);
}

.scroll-line {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 120;
  background: rgba(127, 168, 180, 0.12);
  pointer-events: none;
}
.scroll-line__fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--copper), var(--copper-pale));
  transition: width 0.12s linear;
}

/* ---------- 12. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--night) 0%, var(--film) 100%);
  border-top: 1px solid var(--line-copper);
  color: var(--steel);
  font-size: 0.875rem;
}
.footer__inner { position: relative; z-index: 1; padding: clamp(40px, 6vw, 72px) 0 28px; }
.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 2fr) minmax(0, 1.1fr);
  gap: clamp(24px, 4vw, 56px);
}
.footer__brand-link {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 0.14em;
  color: var(--paper);
}
.footer__brand-link:hover { color: var(--copper-pale); }
.footer__tagline { margin-top: 10px; font-size: 0.75rem; letter-spacing: 0.4em; color: var(--steel); }
.footer__note { margin-top: var(--sp-2); max-width: 22em; line-height: 1.9; color: rgba(147, 162, 174, 0.85); }

.footer__groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 32px);
}
.footer__group-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.24em;
  color: var(--copper);
}
.footer__links { display: flex; flex-direction: column; gap: 9px; }
.footer__link {
  position: relative;
  display: inline-block;
  color: var(--steel);
  transition: color 0.22s ease;
}
.footer__link::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: rgba(192, 138, 62, 0.65);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s var(--ease-water);
}
.footer__link:hover { color: var(--copper-pale); }
.footer__link:hover::before { transform: scaleX(1); }

.footer__contact-list { display: flex; flex-direction: column; gap: 10px; }
.footer__contact-item { display: flex; flex-direction: column; gap: 2px; line-height: 1.65; color: var(--paper); }
.footer__contact-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--steel);
}
.footer__contact-note { margin-top: 14px; max-width: 24em; line-height: 1.85; color: rgba(147, 162, 174, 0.85); }

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 28px;
  margin-top: clamp(32px, 5vw, 56px);
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.8125rem;
  color: rgba(147, 162, 174, 0.9);
}
.footer__icp, .footer__copy { letter-spacing: 0.08em; }
.to-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border: 1px solid var(--line-mid);
  color: var(--steel);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  transition: color 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}
.to-top:hover { color: var(--copper-pale); border-color: var(--copper); background: rgba(192, 138, 62, 0.08); }
.footer__grain {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image:
    repeating-linear-gradient(0deg, rgba(244, 242, 236, 0.022) 0 1px, rgba(244, 242, 236, 0) 1px 3px),
    radial-gradient(120% 70% at 80% 0%, rgba(127, 168, 180, 0.08), rgba(5, 16, 26, 0) 70%);
}

/* ---------- 13. 动效组件 ---------- */
.ripple { position: relative; overflow: hidden; }
.ripple__wave {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, rgba(192, 138, 62, 0.45), rgba(192, 138, 62, 0) 70%);
  transform: translate(-50%, -50%) scale(0.2);
  animation: ripple-out 0.7s var(--ease-water) forwards;
}
@keyframes ripple-out {
  from { transform: translate(-50%, -50%) scale(0.2); opacity: 0.75; }
  to { transform: translate(-50%, -50%) scale(1); opacity: 0; }
}

[data-reveal].is-primed {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease-water), transform 0.7s var(--ease-water);
}
[data-reveal].is-primed.is-visible { opacity: 1; transform: none; }

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1060px) {
  .grid--editorial { grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); }
  .footer__top { grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr); }
  .footer__contact { grid-column: 1 / -1; }
}

@media (max-width: 960px) {
  .grid--split, .grid--halves, .grid--thirds, .grid--mosaic { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 860px) {
  .masthead { grid-template-columns: auto minmax(0, 1fr) auto; }
  .masthead__brand-wrap { grid-column: 2; }
  .masthead__actions { display: none; }
  .nav-toggle { display: inline-flex; }

  .site-nav[data-nav-ready] {
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    border-top-color: transparent;
    transition: max-height 0.4s var(--ease-water), visibility 0s linear 0.4s;
  }
  .site-nav[data-nav-ready][data-open] {
    max-height: min(78vh, 560px);
    visibility: visible;
    border-top-color: var(--line-mid);
    transition: max-height 0.4s var(--ease-water), visibility 0s;
  }
  .site-nav__list { flex-direction: column; padding: 6px 0 2px; }
  .site-nav__item + .site-nav__item { border-left: 0; border-top: 1px solid rgba(127, 168, 180, 0.1); }
  .site-nav__link {
    padding: 14px 2px;
    letter-spacing: 0.18em;
    opacity: 0;
    transform: translateY(-8px);
    transition-delay: 0ms;
  }
  .site-nav__link::after { display: none; }
  .site-nav__link[aria-current="page"] { background: rgba(192, 138, 62, 0.08); padding-left: 12px; }
  .site-nav[data-open] .site-nav__link { opacity: 1; transform: none; }
  .site-nav[data-open] .site-nav__item:nth-child(1) .site-nav__link { transition-delay: 0ms; }
  .site-nav[data-open] .site-nav__item:nth-child(2) .site-nav__link { transition-delay: 40ms; }
  .site-nav[data-open] .site-nav__item:nth-child(3) .site-nav__link { transition-delay: 80ms; }
  .site-nav[data-open] .site-nav__item:nth-child(4) .site-nav__link { transition-delay: 120ms; }
  .site-nav[data-open] .site-nav__item:nth-child(5) .site-nav__link { transition-delay: 160ms; }
  .site-nav[data-open] .site-nav__item:nth-child(6) .site-nav__link { transition-delay: 200ms; }
  .site-nav__note { text-align: left; padding: 8px 2px 16px; letter-spacing: 0.18em; }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  .container { width: min(var(--wrap), 100% - 2rem); }
  .footer__top { grid-template-columns: minmax(0, 1fr); }
  .footer__groups { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__contact { grid-column: auto; }
  .footer__bottom { justify-content: flex-start; }
}

@media (max-width: 460px) {
  .masthead__brand { font-size: 2rem; letter-spacing: 0.1em; text-indent: 0.1em; }
  .masthead__tagline { letter-spacing: 0.24em; text-indent: 0.24em; }
  .nav-toggle { padding: 9px 10px; letter-spacing: 0.12em; }
  .footer__groups { grid-template-columns: minmax(0, 1fr); }
  .footer__contact-item { word-break: break-all; }
}

/* ---------- 15. 偏好与打印 ---------- */
@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: 0ms !important;
  }
  body::before { transform: none; }
  [data-reveal].is-primed { opacity: 1; transform: none; }
  .scroll-line__fill { transition: none; }
}

@media print {
  .site-header, .site-footer, .scroll-line, .to-top { display: none; }
  body { background: #fff; color: #000; }
}