/* ==========================================================================
   /assets/site.css — 澳门新葡萄玩法介绍 共享样式
   1) 定稿变量  2) Reset  3) 排版基础  4) 布局骨架  5) 通用组件
   6) 页头  7) 页脚  8) 响应式与无障碍
   ========================================================================== */

:root {
  --color-surface: #fcfcfc;
  --color-surface-alt: #f3f3f3;
  --color-surface-deep: #e6e7e7;
  --color-ink: #414d4e;
  --color-ink-soft: #627374;
  --color-ink-muted: #768889;
  --color-line: #dadcdd;
  --color-primary: #2b8288;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #dfebec;
  --color-accent: #128262;
  --color-accent-ink: #ffffff;
  --color-highlight: #d2e6e0;
  --color-focus: #0a805e;
  --color-contrast-surface: #111b1c;
  --color-contrast-ink: #e4e7e7;
  --color-contrast-line: #3f4849;
  --color-contrast-accent: #1fe0a9;
  --overlay-scrim: linear-gradient(180deg, rgba(17, 27, 28, 0.35) 0%, rgba(17, 27, 28, 0.72) 55%, rgba(17, 27, 28, 0.92) 100%);
  --font-heading: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-body: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 12.9px;
  --text-sm: 15.5px;
  --text-base: 17px;
  --text-lg: 20.4px;
  --text-xl: 24.5px;
  --text-2xl: 29.4px;
  --text-3xl: 35.3px;
  --text-4xl: 42.3px;
  --text-display: clamp(34px, 6.2vw, 80px);
  --text-figure: clamp(28px, 4.5vw, 58px);
  --weight-heading: 765;
  --weight-body: 400;
  --leading-body: 1.82;
  --leading-heading: 1.29;
  --tracking-heading: -0.002em;
  --radius-sm: 14px;
  --radius-md: 20px;
  --radius-lg: 26px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: 0 6px 18px rgba(65, 77, 78, 0.08);
  --shadow-2: 0 18px 44px rgba(65, 77, 78, 0.14);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1240px;
  --measure: 67ch;
  --gutter: 32px;
  --section-y: 110px;
  --section-y-lg: 154px;
}

/* ------------------------------------------------------------------ 2. Reset */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 148px;
}

body {
  margin: 0;
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

p { margin: 0 0 1.05em; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

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

button { font: inherit; color: inherit; cursor: pointer; background: none; border: 0; padding: 0; }

ul, ol { margin: 0; padding: 0; }

table { width: 100%; border-collapse: collapse; }

hr { border: 0; margin: 0; }

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

.section--contrast :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--color-contrast-accent);
}

/* ------------------------------------------------------- 3. 排版与展示字号 */

.display {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.05;
  letter-spacing: var(--tracking-heading);
  margin: 0;
}

.figure {
  font-family: var(--font-heading);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1.04;
  letter-spacing: var(--tracking-heading);
  font-variant-numeric: tabular-nums;
  margin: 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background-color: var(--color-primary);
  opacity: 0.7;
}

.eyebrow--contrast { color: var(--color-contrast-accent); }
.eyebrow--contrast::before { background-color: var(--color-contrast-line); opacity: 1; }

.section-head {
  display: grid;
  gap: var(--space-2);
  max-width: 72ch;
  margin-bottom: var(--space-6);
}

.section-head__title {
  font-size: var(--text-3xl);
  margin: 0;
}

.section-head__note {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: var(--text-base);
  max-width: var(--measure);
}

.section--contrast .section-head__note { color: var(--color-contrast-ink); opacity: 0.86; }

/* ------------------------------------------------------------- 4. 布局骨架 */

.shell {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

@media (min-width: 768px) { .shell { padding-inline: var(--space-4); } }
@media (min-width: 1100px) { .shell { padding-inline: var(--gutter); } }

.section {
  position: relative;
  padding-block: var(--space-8);
}

@media (min-width: 900px) { .section { padding-block: var(--section-y); } }

.section--lg { padding-block: var(--space-8); }
@media (min-width: 900px) { .section--lg { padding-block: var(--section-y-lg); } }

.section--alt { background-color: var(--color-surface-alt); }
.section--deep { background-color: var(--color-surface-deep); }

.section--contrast {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.section--contrast h1,
.section--contrast h2,
.section--contrast h3,
.section--contrast h4 { color: var(--color-contrast-ink); }
.section--contrast a { color: var(--color-contrast-accent); }
.section--contrast p { color: var(--color-contrast-ink); }

.grid { display: grid; gap: var(--space-3); }
.grid--tight { gap: var(--space-2); }
.grid--loose { gap: var(--space-6); }
.grid--2,
.grid--3,
.grid--4 { grid-template-columns: minmax(0, 1fr); }

@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1000px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.layout { display: grid; gap: var(--space-6); }

@media (min-width: 1000px) {
  .layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: var(--gutter);
    align-items: start;
  }
}

.layout__main { min-width: 0; }

.layout__rail {
  display: grid;
  gap: var(--space-3);
  align-content: start;
  min-width: 0;
}

.prose { max-width: var(--measure); }

.prose h2 {
  font-size: var(--text-2xl);
  margin: var(--space-6) 0 var(--space-2);
}

.prose h3 {
  font-size: var(--text-xl);
  margin: var(--space-4) 0 var(--space-2);
}

.prose ul { display: grid; gap: 10px; margin: 0 0 var(--space-3); }

.prose ul li {
  position: relative;
  padding-left: 24px;
}

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary-soft);
  box-shadow: inset 0 0 0 2px var(--color-primary);
}

/* ------------------------------------------------------------- 5. 通用组件 */

.btn {
  --btn-bg: var(--color-primary);
  --btn-ink: var(--color-primary-ink);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 12px 22px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  background-color: var(--btn-bg);
  color: var(--btn-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.03em;
  line-height: 1.2;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.24s ease, background-color 0.24s ease, color 0.24s ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-1);
  text-decoration: none;
}

.btn:active { transform: translateY(0); }

.btn--accent {
  --btn-bg: var(--color-accent);
  --btn-ink: var(--color-accent-ink);
}

.btn--ghost {
  --btn-bg: transparent;
  --btn-ink: var(--color-ink);
  border-color: var(--color-line);
}

.btn--ghost:hover {
  border-color: var(--color-focus);
  color: var(--color-accent);
  box-shadow: none;
}

.btn--contrast {
  --btn-bg: var(--color-contrast-accent);
  --btn-ink: var(--color-contrast-surface);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary-soft);
  color: var(--color-accent);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: currentColor;
}

.section--contrast .tag {
  background-color: color-mix(in srgb, var(--color-contrast-accent) 18%, transparent);
  color: var(--color-contrast-accent);
}

.card {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4);
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.card--soft {
  background-color: var(--color-primary-soft);
  border-color: transparent;
  box-shadow: none;
}

.card--flat {
  background-color: transparent;
  border: var(--border-thin) dashed var(--color-line);
  border-radius: var(--radius-lg);
  box-shadow: none;
}

.panel-contrast {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-4);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-lg);
}

.panel-contrast h2,
.panel-contrast h3 { color: var(--color-contrast-ink); }
.panel-contrast p { color: var(--color-contrast-ink); opacity: 0.9; }
.panel-contrast a { color: var(--color-contrast-accent); }

.stat {
  display: grid;
  gap: 6px;
  padding: var(--space-3);
  border: var(--border-thin) dashed var(--color-line);
  border-radius: var(--radius-md);
  background-color: color-mix(in srgb, var(--color-primary-soft) 62%, transparent);
}

.stat__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.section--contrast .stat {
  background-color: color-mix(in srgb, var(--color-contrast-accent) 10%, transparent);
  border-color: var(--color-contrast-line);
}

.section--contrast .stat__label { color: var(--color-contrast-ink); opacity: 0.72; }

.dot-rule {
  display: block;
  height: 1px;
  border: 0;
  margin-block: var(--space-4);
  background-image: linear-gradient(90deg, var(--color-line) 0 6px, transparent 6px 12px);
  background-size: 12px 1px;
  background-repeat: repeat-x;
}

.dot-rule--contrast {
  background-image: linear-gradient(90deg, var(--color-contrast-line) 0 6px, transparent 6px 12px);
}

.note-rail {
  display: grid;
  gap: var(--space-2);
  padding-left: var(--space-3);
  border-left: var(--border-thin) dashed var(--color-line);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.section--contrast .note-rail {
  border-left-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}

.link-list {
  display: grid;
  list-style: none;
  margin: 0;
  padding: 0;
}

.link-list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) dashed var(--color-line);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
}

.link-list a::after {
  content: "→";
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

.link-list a:hover { color: var(--color-accent); text-decoration: none; }
.link-list a:hover::after { transform: translateX(4px); }

.section--contrast .link-list a {
  color: var(--color-contrast-ink);
  border-bottom-color: var(--color-contrast-line);
}
.section--contrast .link-list a::after { color: var(--color-contrast-accent); }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  padding: var(--space-1);
  border: var(--border-thin) dashed var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
}

.filter-btn {
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-ink-soft);
  background-color: transparent;
  transition: background-color 0.24s ease, color 0.24s ease, box-shadow 0.24s ease;
}

.filter-btn:hover { background-color: var(--color-surface-alt); color: var(--color-ink); }

.filter-btn[aria-pressed="true"] {
  background-color: var(--color-highlight);
  color: var(--color-accent);
  box-shadow: inset 0 0 0 1px var(--color-focus);
}

[data-filter-tags] { transition: opacity 0.24s ease; }
[data-filter-tags][hidden] { display: none; }

.collapse {
  border: var(--border-thin) dashed var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
}

.collapse__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-3);
  text-align: left;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.collapse__trigger::after {
  content: "+";
  flex: none;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background-color: var(--color-primary-soft);
  color: var(--color-accent);
  font-size: var(--text-base);
  transition: transform 0.24s ease;
}

.collapse__trigger[aria-expanded="true"]::after {
  content: "−";
  transform: rotate(180deg);
}

.collapse__panel {
  height: 0;
  overflow: hidden;
  transition: height 0.3s ease;
}

.collapse__panel > * {
  padding: 0 var(--space-3) var(--space-3);
}

.crumbs {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.crumbs li { display: inline-flex; align-items: center; gap: 6px; }

.crumbs li + li::before {
  content: "·";
  color: var(--color-line);
}

.crumbs a { color: var(--color-ink-soft); }

/* 图片容器基础规则：页面阶段把 img 放进 .media 即可 */
.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-image: linear-gradient(150deg, var(--color-primary-soft) 0%, var(--color-surface-alt) 62%, var(--color-highlight) 100%);
  aspect-ratio: 16 / 10;
  isolation: isolate;
}

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

.media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.72);
}

.media__tint {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(160deg,
    color-mix(in srgb, var(--color-primary) 42%, transparent) 0%,
    color-mix(in srgb, var(--color-accent) 26%, transparent) 100%);
  mix-blend-mode: multiply;
  pointer-events: none;
}

.media__scrim {
  position: absolute;
  inset: 0;
  background-image: var(--overlay-scrim);
  pointer-events: none;
}

.media__caption {
  position: absolute;
  left: var(--space-3);
  right: var(--space-3);
  bottom: var(--space-3);
  margin: 0;
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* ------------------------------------------------------------------ 6. 页头 */

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: 10px;
  z-index: 90;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  font-weight: 600;
  transform: translateY(-180%);
  transition: transform 0.2s ease;
}

.skip-link:focus { transform: translateY(0); text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
  background-color: color-mix(in srgb, var(--color-surface) 94%, transparent);
  border-bottom: var(--border-thin) solid var(--color-line);
  backdrop-filter: blur(14px);
}

.header-top {
  max-height: 140px;
  overflow: hidden;
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  transition: max-height 0.34s ease, opacity 0.28s ease;
}

.site-header.is-compact .header-top {
  max-height: 0;
  opacity: 0;
}

.header-top__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: 12px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: inherit;
  text-decoration: none;
}

.brand:hover { text-decoration: none; }

.brand__mark {
  display: grid;
  grid-template-columns: 7px 7px;
  grid-auto-rows: 7px;
  gap: 3px;
  flex: none;
  padding: 6px;
  border-radius: var(--radius-sm);
  background-color: color-mix(in srgb, var(--color-contrast-accent) 14%, transparent);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-contrast-accent) 34%, transparent);
}

.brand__mark span {
  border-radius: 50%;
  background-color: var(--color-contrast-accent);
}

.brand__mark span:first-child {
  grid-column: 1 / -1;
  justify-self: center;
}

.brand__text { display: grid; gap: 2px; }

.brand__name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: 0.04em;
  line-height: 1.25;
  color: var(--color-contrast-ink);
}

.brand__line {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: color-mix(in srgb, var(--color-contrast-accent) 82%, var(--color-contrast-ink));
}

.header-top__links {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.header-link {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.86;
  letter-spacing: 0.02em;
}

.header-link:hover { color: var(--color-contrast-accent); opacity: 1; }

.header-bar {
  background-color: color-mix(in srgb, var(--color-surface) 96%, transparent);
}

.header-bar__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 66px;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
}

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars span {
  height: 2px;
  border-radius: 2px;
  background-color: var(--color-primary);
  transition: transform 0.24s ease, opacity 0.24s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) 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(-6px) rotate(-45deg); }

.primary-nav { flex: 1 1 auto; min-width: 0; }

.primary-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px;
  list-style: none;
}

.primary-nav__list a {
  display: inline-block;
  padding: 8px 12px;
  border-radius: var(--radius-pill);
  color: var(--color-ink-soft);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  transition: background-color 0.22s ease, color 0.22s ease, box-shadow 0.22s ease;
}

.primary-nav__list a:hover {
  background-color: var(--color-primary-soft);
  color: var(--color-ink);
  text-decoration: none;
}

.primary-nav__list a[aria-current="page"] {
  background-color: var(--color-highlight);
  color: var(--color-accent);
  box-shadow: inset 0 0 0 1px var(--color-focus);
}

.header-bar__cta { flex: none; }

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background-image: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 58%, var(--color-contrast-accent) 100%);
  transition: transform 0.12s linear;
}

/* ------------------------------------------------------------------ 7. 页脚 */

.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: var(--space-8);
  padding-block: var(--space-8) var(--space-4);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.site-footer::before {
  content: "";
  position: absolute;
  left: -15%;
  right: -15%;
  bottom: -50%;
  height: 78%;
  background-image: radial-gradient(58% 100% at 50% 100%,
    color-mix(in srgb, var(--color-primary) 62%, transparent) 0%,
    transparent 72%);
  opacity: 0.5;
  pointer-events: none;
}

.footer-inner { position: relative; z-index: 1; }

.footer-top { display: grid; gap: var(--space-6); }

@media (min-width: 900px) {
  .footer-top { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
}

.footer-lead { display: grid; gap: var(--space-2); align-content: start; }

.footer-lead__line {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: 0.03em;
  color: var(--color-contrast-ink);
}

.footer-lead__note {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

.footer-lead .btn { justify-self: start; margin-top: var(--space-1); }

.footer-links {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(168px, 1fr));
}

.footer-group__title {
  margin: 0;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
}

.footer-group ul {
  display: grid;
  gap: 10px;
  margin-top: var(--space-2);
  list-style: none;
}

.footer-group a {
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  opacity: 0.9;
}

.footer-group a:hover { color: var(--color-contrast-accent); opacity: 1; }

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-6);
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  border-top: var(--border-thin) dashed var(--color-contrast-line);
}

.footer-contact__item {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.footer-contact__item a { color: var(--color-contrast-accent); }

.footer-mark {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--border-thin) dashed var(--color-contrast-line);
  overflow: hidden;
}

.footer-mark__word {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: 0.01em;
  white-space: nowrap;
  color: color-mix(in srgb, var(--color-contrast-accent) 34%, transparent);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: var(--border-thin) dashed var(--color-contrast-line);
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.footer-legal__copy,
.footer-legal__icp { margin: 0; letter-spacing: 0.04em; }

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  list-style: none;
}

.footer-legal__links a {
  color: var(--color-contrast-ink);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--color-contrast-line);
}

.footer-legal__links a:hover { color: var(--color-contrast-accent); }

/* --------------------------------------------- 8. 动效、响应式与无障碍支持 */

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.32s ease-out, transform 0.32s ease-out;
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }

  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 5;
    max-height: 0;
    overflow: hidden;
    padding-inline: var(--space-3);
    background-color: var(--color-surface);
    border: var(--border-thin) solid transparent;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    transition: max-height 0.34s ease;
  }

  .primary-nav[data-open] {
    max-height: min(68vh, 540px);
    overflow-y: auto;
    padding-block: var(--space-2) var(--space-3);
    border-color: var(--color-line);
    box-shadow: var(--shadow-2);
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .primary-nav__list li { width: 100%; }

  .primary-nav__list a {
    display: block;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    border-bottom: var(--border-thin) dashed var(--color-line);
    font-size: var(--text-base);
  }

  .primary-nav__list li:last-child a { border-bottom: 0; }
}

@media (max-width: 720px) {
  .header-top__links { gap: var(--space-2); }
  .header-link { font-size: var(--text-xs); }
  .brand__name { font-size: var(--text-base); }
  .header-bar__inner { justify-content: space-between; }
}

@media (max-width: 560px) {
  .header-bar__cta { display: none; }
  .header-top__inner { gap: var(--space-1); }
  .footer-mark__word { font-size: clamp(28px, 12vw, 60px); }
  .section-head__title { font-size: var(--text-2xl); }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}